1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2026 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS (100 * USEC_PER_MSEC) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 153 const struct cfg80211_chan_def *chandef, 154 u32 prohibited_flags) 155 { 156 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 157 chandef, prohibited_flags)) 158 return false; 159 160 if (chandef->punctured && 161 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 162 return false; 163 164 return true; 165 } 166 167 struct ieee80211_determine_ap_chan_data { 168 /* input data */ 169 struct ieee80211_channel *channel; 170 const struct ieee802_11_elems *elems; 171 const struct ieee80211_conn_settings *conn; 172 u32 vht_cap_info; 173 bool ignore_ht_channel_mismatch; 174 175 /* target chandef is filled in */ 176 struct cfg80211_chan_def *chandef; 177 }; 178 179 static enum ieee80211_conn_mode 180 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 181 struct ieee80211_determine_ap_chan_data *data) 182 { 183 bool ignore_ht_channel_mismatch = data->ignore_ht_channel_mismatch; 184 const struct ieee802_11_elems *elems = data->elems; 185 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 186 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 187 const struct ieee80211_he_operation *he_oper = elems->he_operation; 188 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 189 const struct ieee80211_uhr_operation *uhr_oper = elems->uhr_operation; 190 const struct ieee80211_conn_settings *conn = data->conn; 191 struct ieee80211_channel *channel = data->channel; 192 struct cfg80211_chan_def *chandef = data->chandef; 193 struct ieee80211_supported_band *sband = 194 sdata->local->hw.wiphy->bands[channel->band]; 195 struct cfg80211_chan_def vht_chandef; 196 bool no_vht = false; 197 u32 ht_cfreq; 198 199 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 200 ignore_ht_channel_mismatch = false; 201 202 *chandef = (struct cfg80211_chan_def) { 203 .chan = channel, 204 .width = NL80211_CHAN_WIDTH_20_NOHT, 205 .center_freq1 = channel->center_freq, 206 .freq1_offset = channel->freq_offset, 207 }; 208 209 /* get special S1G case out of the way */ 210 if (sband->band == NL80211_BAND_S1GHZ) { 211 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 212 chandef)) { 213 /* Fallback to default 1MHz */ 214 chandef->width = NL80211_CHAN_WIDTH_1; 215 chandef->s1g_primary_2mhz = false; 216 } 217 218 return IEEE80211_CONN_MODE_S1G; 219 } 220 221 /* get special 6 GHz case out of the way */ 222 if (sband->band == NL80211_BAND_6GHZ) { 223 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_HIGHEST; 224 225 /* this is an error */ 226 if (conn->mode < IEEE80211_CONN_MODE_HE) 227 return IEEE80211_CONN_MODE_LEGACY; 228 229 if (!elems->he_6ghz_capa || !elems->he_cap) { 230 sdata_info(sdata, 231 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 232 return IEEE80211_CONN_MODE_LEGACY; 233 } 234 235 if (!eht_oper || !elems->eht_cap) { 236 eht_oper = NULL; 237 mode = IEEE80211_CONN_MODE_HE; 238 } 239 240 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 241 eht_oper, chandef)) { 242 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 243 return IEEE80211_CONN_MODE_LEGACY; 244 } 245 246 if (eht_oper && ieee80211_hw_check(&sdata->local->hw, STRICT)) { 247 struct cfg80211_chan_def he_chandef = *chandef; 248 249 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, 250 he_oper, NULL, 251 &he_chandef)) { 252 sdata_info(sdata, 253 "bad HE operation in EHT AP\n"); 254 return IEEE80211_CONN_MODE_LEGACY; 255 } 256 257 if (!cfg80211_chandef_compatible(chandef, 258 &he_chandef)) { 259 sdata_info(sdata, "HE/EHT incompatible\n"); 260 return IEEE80211_CONN_MODE_LEGACY; 261 } 262 } 263 264 if (mode <= IEEE80211_CONN_MODE_EHT) 265 return mode; 266 goto check_uhr; 267 } 268 269 /* now we have the progression HT, VHT, ... */ 270 if (conn->mode < IEEE80211_CONN_MODE_HT) 271 return IEEE80211_CONN_MODE_LEGACY; 272 273 if (!ht_oper || !elems->ht_cap_elem) 274 return IEEE80211_CONN_MODE_LEGACY; 275 276 chandef->width = NL80211_CHAN_WIDTH_20; 277 278 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 279 channel->band); 280 /* check that channel matches the right operating channel */ 281 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 282 /* 283 * It's possible that some APs are confused here; 284 * Netgear WNDR3700 sometimes reports 4 higher than 285 * the actual channel in association responses, but 286 * since we look at probe response/beacon data here 287 * it should be OK. 288 */ 289 sdata_info(sdata, 290 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 291 channel->center_freq, ht_cfreq, 292 ht_oper->primary_chan, channel->band); 293 return IEEE80211_CONN_MODE_LEGACY; 294 } 295 296 ieee80211_chandef_ht_oper(ht_oper, chandef); 297 298 if (conn->mode < IEEE80211_CONN_MODE_VHT) 299 return IEEE80211_CONN_MODE_HT; 300 301 vht_chandef = *chandef; 302 303 /* 304 * having he_cap/he_oper parsed out implies we're at 305 * least operating as HE STA 306 */ 307 if (elems->he_cap && he_oper && 308 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 309 struct ieee80211_vht_operation he_oper_vht_cap; 310 311 /* 312 * Set only first 3 bytes (other 2 aren't used in 313 * ieee80211_chandef_vht_oper() anyway) 314 */ 315 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 316 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 317 318 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, data->vht_cap_info, 319 &he_oper_vht_cap, ht_oper, 320 &vht_chandef)) { 321 sdata_info(sdata, 322 "HE AP VHT information is invalid, disabling HE\n"); 323 /* this will cause us to re-parse as VHT STA */ 324 return IEEE80211_CONN_MODE_VHT; 325 } 326 } else if (!vht_oper || !elems->vht_cap_elem) { 327 if (sband->band == NL80211_BAND_5GHZ) 328 return IEEE80211_CONN_MODE_HT; 329 no_vht = true; 330 } else if (sband->band == NL80211_BAND_2GHZ) { 331 no_vht = true; 332 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 333 data->vht_cap_info, 334 vht_oper, ht_oper, 335 &vht_chandef)) { 336 sdata_info(sdata, 337 "AP VHT information is invalid, disabling VHT\n"); 338 return IEEE80211_CONN_MODE_HT; 339 } 340 341 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 342 sdata_info(sdata, 343 "AP VHT information doesn't match HT, disabling VHT\n"); 344 return IEEE80211_CONN_MODE_HT; 345 } 346 347 *chandef = vht_chandef; 348 349 /* stick to current max mode if we or the AP don't have HE */ 350 if (conn->mode < IEEE80211_CONN_MODE_HE || 351 !elems->he_operation || !elems->he_cap) { 352 if (no_vht) 353 return IEEE80211_CONN_MODE_HT; 354 return IEEE80211_CONN_MODE_VHT; 355 } 356 357 /* stick to HE if we or the AP don't have EHT */ 358 if (conn->mode < IEEE80211_CONN_MODE_EHT || 359 !eht_oper || !elems->eht_cap) 360 return IEEE80211_CONN_MODE_HE; 361 362 /* 363 * handle the case that the EHT operation indicates that it holds EHT 364 * operation information (in case that the channel width differs from 365 * the channel width reported in HT/VHT/HE). 366 */ 367 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 368 struct cfg80211_chan_def eht_chandef = *chandef; 369 370 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 371 &eht_chandef); 372 373 eht_chandef.punctured = 374 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 375 376 if (!cfg80211_chandef_valid(&eht_chandef)) { 377 sdata_info(sdata, 378 "AP EHT information is invalid, disabling EHT\n"); 379 return IEEE80211_CONN_MODE_HE; 380 } 381 382 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 383 sdata_info(sdata, 384 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 385 return IEEE80211_CONN_MODE_HE; 386 } 387 388 *chandef = eht_chandef; 389 } 390 391 check_uhr: 392 if (conn->mode < IEEE80211_CONN_MODE_UHR || !uhr_oper) 393 return IEEE80211_CONN_MODE_EHT; 394 395 if (elems->frame_type != (IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON)) { 396 struct cfg80211_chan_def npca_chandef = *chandef; 397 const struct ieee80211_sta_uhr_cap *uhr_cap; 398 const struct ieee80211_uhr_npca_info *npca; 399 400 /* frames other than beacons carry UHR capability too */ 401 if (!elems->uhr_cap) 402 return IEEE80211_CONN_MODE_EHT; 403 404 npca = ieee80211_uhr_npca_info(uhr_oper); 405 406 if (npca && !(elems->uhr_cap->mac.mac_cap[0] & 407 IEEE80211_UHR_MAC_CAP0_NPCA_SUPP)) { 408 sdata_info(sdata, 409 "AP without UHR NPCA capability uses it, disabling UHR\n"); 410 return IEEE80211_CONN_MODE_EHT; 411 } 412 413 /* DBE is not considered yet, so this works */ 414 if (!cfg80211_chandef_npca_valid(sdata->local->hw.wiphy, 415 &npca_chandef, npca) || 416 cfg80211_chandef_add_npca(sdata->local->hw.wiphy, 417 &npca_chandef, npca)) { 418 sdata_info(sdata, 419 "AP UHR NPCA settings invalid, disabling UHR\n"); 420 return IEEE80211_CONN_MODE_EHT; 421 } 422 423 uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 424 /* can't happen since we must have UHR to parse the elems */ 425 if (WARN_ON(!uhr_cap)) 426 return IEEE80211_CONN_MODE_EHT; 427 428 if (uhr_cap->mac.mac_cap[0] & IEEE80211_UHR_MAC_CAP0_NPCA_SUPP) 429 *chandef = npca_chandef; 430 } 431 432 return IEEE80211_CONN_MODE_UHR; 433 } 434 435 static bool 436 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 437 struct ieee80211_supported_band *sband, 438 const struct ieee80211_ht_operation *ht_op) 439 { 440 struct ieee80211_sta_ht_cap sta_ht_cap; 441 int i; 442 443 if (sband->band == NL80211_BAND_6GHZ) 444 return true; 445 446 if (!ht_op) 447 return false; 448 449 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 450 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 451 452 /* 453 * Some Xfinity XB8 firmware advertises >1 spatial stream MCS indexes in 454 * their basic HT-MCS set. On cards with lower spatial streams, the check 455 * would fail, and we'd be stuck with no HT when it in fact work fine with 456 * its own supported rate. So check it only in strict mode. 457 */ 458 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 459 return true; 460 461 /* 462 * P802.11REVme/D7.0 - 6.5.4.2.4 463 * ... 464 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 465 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 466 * in the HT Operation parameter that contains any unsupported MCSs, 467 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 468 * contain a ResultCode parameter that is not set to the value SUCCESS. 469 * ... 470 */ 471 472 /* Simply check that all basic rates are in the STA RX mask */ 473 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 474 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 475 ht_op->basic_set[i]) 476 return false; 477 } 478 479 return true; 480 } 481 482 static bool 483 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 484 int link_id, 485 struct ieee80211_supported_band *sband, 486 const struct ieee80211_vht_operation *vht_op) 487 { 488 struct ieee80211_sta_vht_cap sta_vht_cap; 489 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 490 int nss; 491 492 if (sband->band != NL80211_BAND_5GHZ) 493 return true; 494 495 if (!vht_op) 496 return false; 497 498 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 499 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 500 501 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 502 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 503 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 504 505 /* 506 * Many APs are incorrectly advertising an all-zero value here, 507 * which really means MCS 0-7 are required for 1-8 streams, but 508 * they don't really mean it that way. 509 * Some other APs are incorrectly advertising 3 spatial streams 510 * with MCS 0-7 are required, but don't really mean it that way 511 * and we'll connect only with HT, rather than even HE. 512 * As a result, unfortunately the VHT basic MCS/NSS set cannot 513 * be used at all, so check it only in strict mode. 514 */ 515 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 516 return true; 517 518 /* 519 * P802.11REVme/D7.0 - 6.5.4.2.4 520 * ... 521 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 522 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 523 * field in the VHT Operation parameter that contains any unsupported 524 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 525 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 526 * that is not set to the value SUCCESS. 527 * ... 528 */ 529 for (nss = 8; nss > 0; nss--) { 530 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 531 u8 sta_rx_val; 532 u8 sta_tx_val; 533 534 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 535 continue; 536 537 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 538 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 539 540 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 541 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 542 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 543 link_id_info(sdata, link_id, 544 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 545 nss, sta_rx_val, sta_tx_val, ap_op_val); 546 return false; 547 } 548 } 549 550 return true; 551 } 552 553 static bool 554 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 555 int link_id, 556 const struct ieee80211_he_cap_elem *he_cap, 557 const struct ieee80211_he_operation *he_op) 558 { 559 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 560 u16 mcs_80_map_tx, mcs_80_map_rx; 561 u16 ap_min_req_set; 562 int nss; 563 564 if (!he_cap) 565 return false; 566 567 /* mcs_nss is right after he_cap info */ 568 he_mcs_nss_supp = (void *)(he_cap + 1); 569 570 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 571 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 572 573 /* P802.11-REVme/D0.3 574 * 27.1.1 Introduction to the HE PHY 575 * ... 576 * An HE STA shall support the following features: 577 * ... 578 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 579 * supported channel widths for HE SU PPDUs 580 */ 581 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 582 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 583 link_id_info(sdata, link_id, 584 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 585 mcs_80_map_tx, mcs_80_map_rx); 586 return false; 587 } 588 589 if (!he_op) 590 return true; 591 592 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 593 594 /* 595 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 596 * zeroes, which is nonsense, and completely inconsistent with itself 597 * (it doesn't have 8 streams). Accept the settings in this case anyway. 598 */ 599 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 600 return true; 601 602 /* make sure the AP is consistent with itself 603 * 604 * P802.11-REVme/D0.3 605 * 26.17.1 Basic HE BSS operation 606 * 607 * A STA that is operating in an HE BSS shall be able to receive and 608 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 609 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 610 * MLME-START.request primitive and shall be able to receive at each of 611 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 612 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 613 * primitive 614 */ 615 for (nss = 8; nss > 0; nss--) { 616 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 617 u8 ap_rx_val; 618 u8 ap_tx_val; 619 620 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 621 continue; 622 623 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 624 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 625 626 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 627 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 628 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 629 link_id_info(sdata, link_id, 630 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 631 nss, ap_rx_val, ap_tx_val, ap_op_val); 632 return false; 633 } 634 } 635 636 return true; 637 } 638 639 static bool 640 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 641 struct ieee80211_supported_band *sband, 642 const struct ieee80211_he_operation *he_op) 643 { 644 const struct ieee80211_sta_he_cap *sta_he_cap = 645 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 646 u16 ap_min_req_set; 647 int i; 648 649 if (!sta_he_cap || !he_op) 650 return false; 651 652 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 653 654 /* 655 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 656 * zeroes, which is nonsense, and completely inconsistent with itself 657 * (it doesn't have 8 streams). Accept the settings in this case anyway. 658 */ 659 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 660 return true; 661 662 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 663 for (i = 0; i < 3; i++) { 664 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 665 &sta_he_cap->he_mcs_nss_supp; 666 u16 sta_mcs_map_rx = 667 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 668 u16 sta_mcs_map_tx = 669 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 670 u8 nss; 671 bool verified = true; 672 673 /* 674 * For each band there is a maximum of 8 spatial streams 675 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 676 * of 2 bits per NSS (1-8), with the values defined in enum 677 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 678 * capabilities aren't less than the AP's minimum requirements 679 * for this HE BSS per SS. 680 * It is enough to find one such band that meets the reqs. 681 */ 682 for (nss = 8; nss > 0; nss--) { 683 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 684 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 685 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 686 687 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 688 continue; 689 690 /* 691 * Make sure the HE AP doesn't require MCSs that aren't 692 * supported by the client as required by spec 693 * 694 * P802.11-REVme/D0.3 695 * 26.17.1 Basic HE BSS operation 696 * 697 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 698 * a BSS, unless it supports (i.e., is able to both transmit and 699 * receive using) all of the <HE-MCS, NSS> tuples in the basic 700 * HE-MCS and NSS set. 701 */ 702 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 703 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 704 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 705 verified = false; 706 break; 707 } 708 } 709 710 if (verified) 711 return true; 712 } 713 714 /* If here, STA doesn't meet AP's HE min requirements */ 715 return false; 716 } 717 718 static u8 719 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 720 const struct ieee80211_sta_eht_cap *sta_eht_cap, 721 unsigned int idx, int bw) 722 { 723 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 724 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 725 726 /* handle us being a 20 MHz-only EHT STA - with four values 727 * for MCS 0-7, 8-9, 10-11, 12-13. 728 */ 729 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 730 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 731 732 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 733 if (idx > 0) 734 idx--; 735 736 switch (bw) { 737 case 0: 738 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 739 case 1: 740 if (!(he_phy_cap0 & 741 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 742 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 743 return 0xff; /* pass check */ 744 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 745 case 2: 746 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 747 return 0xff; /* pass check */ 748 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 749 } 750 751 WARN_ON(1); 752 return 0; 753 } 754 755 static bool 756 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 757 struct ieee80211_supported_band *sband, 758 const struct ieee80211_eht_operation *eht_op) 759 { 760 const struct ieee80211_sta_he_cap *sta_he_cap = 761 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 762 const struct ieee80211_sta_eht_cap *sta_eht_cap = 763 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 764 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 765 unsigned int i; 766 767 if (!sta_he_cap || !sta_eht_cap || !eht_op) 768 return false; 769 770 req = &eht_op->basic_mcs_nss; 771 772 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 773 u8 req_rx_nss, req_tx_nss; 774 unsigned int bw; 775 776 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 777 IEEE80211_EHT_MCS_NSS_RX); 778 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 779 IEEE80211_EHT_MCS_NSS_TX); 780 781 for (bw = 0; bw < 3; bw++) { 782 u8 have, have_rx_nss, have_tx_nss; 783 784 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 785 sta_eht_cap, 786 i, bw); 787 have_rx_nss = u8_get_bits(have, 788 IEEE80211_EHT_MCS_NSS_RX); 789 have_tx_nss = u8_get_bits(have, 790 IEEE80211_EHT_MCS_NSS_TX); 791 792 if (req_rx_nss > have_rx_nss || 793 req_tx_nss > have_tx_nss) 794 return false; 795 } 796 } 797 798 return true; 799 } 800 801 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 802 const u8 *supp_rates, 803 unsigned int supp_rates_len, 804 const u8 *ext_supp_rates, 805 unsigned int ext_supp_rates_len, 806 u32 *rates, u32 *basic_rates, 807 unsigned long *unknown_rates_selectors, 808 bool *have_higher_than_11mbit, 809 int *min_rate, int *min_rate_index) 810 { 811 int i, j; 812 813 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 814 u8 supp_rate = i < supp_rates_len ? 815 supp_rates[i] : 816 ext_supp_rates[i - supp_rates_len]; 817 int rate = supp_rate & 0x7f; 818 bool is_basic = !!(supp_rate & 0x80); 819 820 if ((rate * 5) > 110 && have_higher_than_11mbit) 821 *have_higher_than_11mbit = true; 822 823 /* 824 * Skip membership selectors since they're not rates. 825 * 826 * Note: Even though the membership selector and the basic 827 * rate flag share the same bit, they are not exactly 828 * the same. 829 */ 830 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 831 if (unknown_rates_selectors) 832 set_bit(rate, unknown_rates_selectors); 833 continue; 834 } 835 836 for (j = 0; j < sband->n_bitrates; j++) { 837 struct ieee80211_rate *br; 838 int brate; 839 840 br = &sband->bitrates[j]; 841 842 brate = DIV_ROUND_UP(br->bitrate, 5); 843 if (brate == rate) { 844 if (rates) 845 *rates |= BIT(j); 846 if (is_basic && basic_rates) 847 *basic_rates |= BIT(j); 848 if (min_rate && (rate * 5) < *min_rate) { 849 *min_rate = rate * 5; 850 if (min_rate_index) 851 *min_rate_index = j; 852 } 853 break; 854 } 855 } 856 857 /* Handle an unknown entry as if it is an unknown selector */ 858 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 859 set_bit(rate, unknown_rates_selectors); 860 } 861 } 862 863 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 864 { 865 if (c->width == NL80211_CHAN_WIDTH_80P80) 866 return 4 + 4; 867 868 return cfg80211_chandef_get_width(c) / 20; 869 } 870 871 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 872 { 873 switch (c->width) { 874 case NL80211_CHAN_WIDTH_20: 875 case NL80211_CHAN_WIDTH_20_NOHT: 876 return 1; 877 case NL80211_CHAN_WIDTH_40: 878 return 2; 879 case NL80211_CHAN_WIDTH_80P80: 880 case NL80211_CHAN_WIDTH_80: 881 return 3; 882 case NL80211_CHAN_WIDTH_160: 883 return 4; 884 case NL80211_CHAN_WIDTH_320: 885 return 5; 886 default: 887 WARN_ON(1); 888 return 0; 889 } 890 } 891 892 VISIBLE_IF_MAC80211_KUNIT int 893 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 894 u8 n_partial_subchans) 895 { 896 int n = ieee80211_chandef_num_subchans(ap); 897 struct cfg80211_chan_def tmp = *ap; 898 int offset = 0; 899 900 /* 901 * Given a chandef (in this context, it's the AP's) and a number 902 * of subchannels that we want to look at ('n_partial_subchans'), 903 * calculate the offset in number of subchannels between the full 904 * and the subset with the desired width. 905 */ 906 907 /* same number of subchannels means no offset, obviously */ 908 if (n == n_partial_subchans) 909 return 0; 910 911 /* don't WARN - misconfigured APs could cause this if their N > width */ 912 if (n < n_partial_subchans) 913 return 0; 914 915 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 916 u32 prev = tmp.center_freq1; 917 918 ieee80211_chandef_downgrade(&tmp, NULL); 919 920 /* 921 * if center_freq moved up, half the original channels 922 * are gone now but were below, so increase offset 923 */ 924 if (prev < tmp.center_freq1) 925 offset += ieee80211_chandef_num_subchans(&tmp); 926 } 927 928 /* 929 * 80+80 with secondary 80 below primary - four subchannels for it 930 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 931 */ 932 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 933 ap->center_freq2 < ap->center_freq1) 934 offset += 4; 935 936 return offset; 937 } 938 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 939 940 VISIBLE_IF_MAC80211_KUNIT void 941 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 942 const struct cfg80211_chan_def *ap, 943 const struct cfg80211_chan_def *used) 944 { 945 u8 needed = ieee80211_chandef_num_subchans(used); 946 u8 have = ieee80211_chandef_num_subchans(ap); 947 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 948 u8 offset; 949 950 if (!psd->valid) 951 return; 952 953 /* if N is zero, all defaults were used, no point in rearranging */ 954 if (!psd->n) 955 goto out; 956 957 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 958 959 /* 960 * This assumes that 'N' is consistent with the HE channel, as 961 * it should be (otherwise the AP is broken). 962 * 963 * In psd->power we have values in the order 0..N, 0..K, where 964 * N+K should cover the entire channel per 'ap', but even if it 965 * doesn't then we've pre-filled 'unlimited' as defaults. 966 * 967 * But this is all the wrong order, we want to have them in the 968 * order of the 'used' channel. 969 * 970 * So for example, we could have a 320 MHz EHT AP, which has the 971 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 972 * seem to be considered for the TPE), as follows: 973 * 974 * EHT 320: | | | | | | | | | | | | | | | | | 975 * HE 80: | | | | | 976 * used 160: | | | | | | | | | 977 * 978 * N entries: |--|--|--|--| 979 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 980 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 981 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 982 * used chan: 0 1 2 3 4 5 6 7 983 * 984 * The idx in the power array ('power idx') is like this since it 985 * comes directly from the element's N and K entries in their 986 * element order, and those are this way for HE compatibility. 987 * 988 * Rearrange them as desired here, first by putting them into the 989 * 'full chan' order, and then selecting the necessary subset for 990 * the 'used chan'. 991 */ 992 993 /* first reorder according to AP channel */ 994 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 995 for (int i = 0; i < have; i++) { 996 if (i < offset) 997 tmp[i] = psd->power[i + psd->n]; 998 else if (i < offset + psd->n) 999 tmp[i] = psd->power[i - offset]; 1000 else 1001 tmp[i] = psd->power[i]; 1002 } 1003 1004 /* 1005 * and then select the subset for the used channel 1006 * (set everything to defaults first in case a driver is confused) 1007 */ 1008 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 1009 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 1010 for (int i = 0; i < needed; i++) 1011 psd->power[i] = tmp[offset + i]; 1012 1013 out: 1014 /* limit, but don't lie if there are defaults in the data */ 1015 if (needed < psd->count) 1016 psd->count = needed; 1017 } 1018 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 1019 1020 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 1021 const struct cfg80211_chan_def *ap, 1022 const struct cfg80211_chan_def *used) 1023 { 1024 /* ignore this completely for narrow/invalid channels */ 1025 if (!ieee80211_chandef_num_subchans(ap) || 1026 !ieee80211_chandef_num_subchans(used)) { 1027 ieee80211_clear_tpe(tpe); 1028 return; 1029 } 1030 1031 for (int i = 0; i < 2; i++) { 1032 int needed_pwr_count; 1033 1034 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 1035 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 1036 1037 /* limit this to the widths we actually need */ 1038 needed_pwr_count = ieee80211_chandef_num_widths(used); 1039 if (needed_pwr_count < tpe->max_local[i].count) 1040 tpe->max_local[i].count = needed_pwr_count; 1041 if (needed_pwr_count < tpe->max_reg_client[i].count) 1042 tpe->max_reg_client[i].count = needed_pwr_count; 1043 } 1044 } 1045 1046 /* 1047 * The AP part of the channel request is used to distinguish settings 1048 * to the device used for wider bandwidth OFDMA. This is used in the 1049 * channel context code to assign two channel contexts even if they're 1050 * both for the same channel, if the AP bandwidths are incompatible. 1051 * If not EHT (or driver override) then ap.chan == NULL indicates that 1052 * there's no wider BW OFDMA used. 1053 */ 1054 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 1055 struct ieee80211_chan_req *chanreq, 1056 struct ieee80211_conn_settings *conn, 1057 struct cfg80211_chan_def *ap_chandef) 1058 { 1059 chanreq->ap.chan = NULL; 1060 1061 if (conn->mode < IEEE80211_CONN_MODE_EHT) 1062 return; 1063 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 1064 return; 1065 1066 chanreq->ap = *ap_chandef; 1067 } 1068 1069 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 1070 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 1071 struct ieee80211_conn_settings *conn, 1072 struct cfg80211_bss *cbss, int link_id, 1073 struct ieee80211_chan_req *chanreq, 1074 struct cfg80211_chan_def *ap_chandef, 1075 unsigned long *userspace_selectors) 1076 { 1077 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1078 struct ieee80211_bss *bss = (void *)cbss->priv; 1079 struct ieee80211_channel *channel = cbss->channel; 1080 struct ieee80211_elems_parse_params parse_params = { 1081 .link_id = -1, 1082 .from_ap = true, 1083 .start = ies->data, 1084 .len = ies->len, 1085 .type = ies->from_beacon ? 1086 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1087 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1088 }; 1089 struct ieee802_11_elems *elems; 1090 struct ieee80211_supported_band *sband; 1091 enum ieee80211_conn_mode ap_mode; 1092 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1093 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1094 struct ieee80211_determine_ap_chan_data ap_chan_data = { 1095 .channel = channel, 1096 .vht_cap_info = bss->vht_cap_info, 1097 .ignore_ht_channel_mismatch = false, 1098 .chandef = ap_chandef, 1099 .conn = conn, 1100 }; 1101 int ret; 1102 1103 again: 1104 parse_params.mode = conn->mode; 1105 elems = ieee802_11_parse_elems_full(&parse_params); 1106 if (!elems) 1107 return ERR_PTR(-ENOMEM); 1108 1109 ap_chan_data.elems = elems; 1110 ap_mode = ieee80211_determine_ap_chan(sdata, &ap_chan_data); 1111 1112 /* this should be impossible since parsing depends on our mode */ 1113 if (WARN_ON(ap_mode > conn->mode)) { 1114 ret = -EINVAL; 1115 goto free; 1116 } 1117 1118 if (conn->mode != ap_mode) { 1119 conn->mode = ap_mode; 1120 kfree(elems); 1121 goto again; 1122 } 1123 1124 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1125 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1126 1127 sband = sdata->local->hw.wiphy->bands[channel->band]; 1128 1129 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1130 elems->ext_supp_rates, elems->ext_supp_rates_len, 1131 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1132 NULL); 1133 1134 switch (channel->band) { 1135 case NL80211_BAND_S1GHZ: 1136 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1137 ret = -EINVAL; 1138 goto free; 1139 } 1140 1141 chanreq->oper = *ap_chandef; 1142 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1143 IEEE80211_CHAN_DISABLED)) { 1144 ret = -EINVAL; 1145 goto free; 1146 } 1147 1148 return elems; 1149 case NL80211_BAND_6GHZ: 1150 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1151 link_id_info(sdata, link_id, 1152 "Rejecting non-HE 6/7 GHz connection"); 1153 ret = -EINVAL; 1154 goto free; 1155 } 1156 break; 1157 default: 1158 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1159 ret = -EINVAL; 1160 goto free; 1161 } 1162 } 1163 1164 switch (ap_mode) { 1165 case IEEE80211_CONN_MODE_S1G: 1166 WARN_ON(1); 1167 ret = -EINVAL; 1168 goto free; 1169 case IEEE80211_CONN_MODE_LEGACY: 1170 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1171 break; 1172 case IEEE80211_CONN_MODE_HT: 1173 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1174 conn->bw_limit, 1175 IEEE80211_CONN_BW_LIMIT_40); 1176 break; 1177 case IEEE80211_CONN_MODE_VHT: 1178 case IEEE80211_CONN_MODE_HE: 1179 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1180 conn->bw_limit, 1181 IEEE80211_CONN_BW_LIMIT_160); 1182 break; 1183 case IEEE80211_CONN_MODE_EHT: 1184 case IEEE80211_CONN_MODE_UHR: 1185 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1186 conn->bw_limit, 1187 IEEE80211_CONN_BW_LIMIT_320); 1188 break; 1189 } 1190 1191 chanreq->oper = *ap_chandef; 1192 1193 bitmap_copy(sta_selectors, userspace_selectors, 128); 1194 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1195 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1196 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1197 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1198 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1199 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1200 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1201 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1202 if (conn->mode >= IEEE80211_CONN_MODE_UHR) 1203 set_bit(BSS_MEMBERSHIP_SELECTOR_UHR_PHY, sta_selectors); 1204 1205 /* 1206 * We do not support EPD or GLK so never add them. 1207 * SAE_H2E is handled through userspace_selectors. 1208 */ 1209 1210 /* Check if we support all required features */ 1211 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1212 link_id_info(sdata, link_id, 1213 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1214 ret = -EINVAL; 1215 goto free; 1216 } 1217 1218 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1219 1220 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1221 IEEE80211_CHAN_DISABLED)) { 1222 if (chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT) { 1223 link_id_info(sdata, link_id, 1224 "unusable channel (%d MHz) for connection\n", 1225 chanreq->oper.chan->center_freq); 1226 ret = -EINVAL; 1227 goto free; 1228 } 1229 1230 ieee80211_chanreq_downgrade(chanreq, conn); 1231 } 1232 1233 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1234 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1235 IEEE80211_CHAN_NO_HE)) { 1236 conn->mode = IEEE80211_CONN_MODE_VHT; 1237 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1238 conn->bw_limit, 1239 IEEE80211_CONN_BW_LIMIT_160); 1240 } 1241 1242 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1243 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1244 IEEE80211_CHAN_NO_EHT)) { 1245 conn->mode = IEEE80211_CONN_MODE_HE; 1246 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1247 conn->bw_limit, 1248 IEEE80211_CONN_BW_LIMIT_160); 1249 } 1250 1251 if (conn->mode >= IEEE80211_CONN_MODE_UHR && 1252 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1253 IEEE80211_CHAN_NO_UHR)) 1254 conn->mode = IEEE80211_CONN_MODE_EHT; 1255 1256 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1257 link_id_info(sdata, link_id, 1258 "regulatory prevented using AP config, downgraded\n"); 1259 1260 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1261 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1262 elems->ht_operation)) { 1263 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1264 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1265 link_id_info(sdata, link_id, 1266 "required MCSes not supported, disabling HT\n"); 1267 } 1268 1269 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1270 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1271 elems->vht_operation)) { 1272 conn->mode = IEEE80211_CONN_MODE_HT; 1273 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1274 conn->bw_limit, 1275 IEEE80211_CONN_BW_LIMIT_40); 1276 link_id_info(sdata, link_id, 1277 "required MCSes not supported, disabling VHT\n"); 1278 } 1279 1280 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1281 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1282 (void *)elems->he_cap, 1283 elems->he_operation) || 1284 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1285 elems->he_operation))) { 1286 conn->mode = IEEE80211_CONN_MODE_VHT; 1287 link_id_info(sdata, link_id, 1288 "required MCSes not supported, disabling HE\n"); 1289 } 1290 1291 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1292 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1293 elems->eht_operation)) { 1294 conn->mode = IEEE80211_CONN_MODE_HE; 1295 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1296 conn->bw_limit, 1297 IEEE80211_CONN_BW_LIMIT_160); 1298 link_id_info(sdata, link_id, 1299 "required MCSes not supported, disabling EHT\n"); 1300 } 1301 1302 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1303 channel->band != NL80211_BAND_2GHZ && 1304 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1305 conn->mode = IEEE80211_CONN_MODE_HE; 1306 link_id_info(sdata, link_id, 1307 "required bandwidth not supported, disabling EHT\n"); 1308 } 1309 1310 /* the mode can only decrease, so this must terminate */ 1311 if (ap_mode != conn->mode) { 1312 kfree(elems); 1313 goto again; 1314 } 1315 1316 mlme_link_id_dbg(sdata, link_id, 1317 "connecting with %s mode, max bandwidth %d MHz\n", 1318 ieee80211_conn_mode_str(conn->mode), 1319 20 * (1 << conn->bw_limit)); 1320 1321 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1322 ret = -EINVAL; 1323 goto free; 1324 } 1325 1326 return elems; 1327 free: 1328 kfree(elems); 1329 return ERR_PTR(ret); 1330 } 1331 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1332 1333 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1334 struct ieee802_11_elems *elems, 1335 bool update, u64 *changed, u16 stype) 1336 { 1337 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1338 struct cfg80211_chan_def ap_chandef; 1339 struct ieee80211_determine_ap_chan_data ap_chan_data = { 1340 .channel = channel, 1341 .vht_cap_info = 0, 1342 .ignore_ht_channel_mismatch = true, 1343 .chandef = &ap_chandef, 1344 .elems = elems, 1345 .conn = &link->u.mgd.conn, 1346 }; 1347 struct ieee80211_sub_if_data *sdata = link->sdata; 1348 struct ieee80211_chanctx_conf *chanctx_conf; 1349 struct ieee80211_chan_req chanreq = {}; 1350 enum ieee80211_conn_mode ap_mode; 1351 const char *frame; 1352 u16 ht_opmode; 1353 int ret; 1354 1355 switch (stype) { 1356 case IEEE80211_STYPE_BEACON: 1357 frame = "beacon"; 1358 break; 1359 case IEEE80211_STYPE_ASSOC_RESP: 1360 frame = "assoc response"; 1361 break; 1362 case IEEE80211_STYPE_REASSOC_RESP: 1363 frame = "reassoc response"; 1364 break; 1365 case IEEE80211_STYPE_ACTION: 1366 /* the only action frame that gets here */ 1367 frame = "ML reconf response"; 1368 break; 1369 default: 1370 return -EINVAL; 1371 } 1372 1373 /* don't track any bandwidth changes in legacy/S1G modes */ 1374 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1375 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1376 return 0; 1377 1378 if (elems->vht_cap_elem) 1379 ap_chan_data.vht_cap_info = 1380 le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1381 1382 ap_mode = ieee80211_determine_ap_chan(sdata, &ap_chan_data); 1383 1384 if (ap_mode != link->u.mgd.conn.mode) { 1385 link_info(link, 1386 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1387 link->u.mgd.bssid, 1388 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1389 ieee80211_conn_mode_str(ap_mode), frame); 1390 return -EINVAL; 1391 } 1392 1393 chanreq.oper = ap_chandef; 1394 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1395 &ap_chandef); 1396 1397 /* 1398 * if HT operation mode changed store the new one - 1399 * this may be applicable even if channel is identical 1400 */ 1401 if (elems->ht_operation) { 1402 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1403 if (link->conf->ht_operation_mode != ht_opmode) { 1404 *changed |= BSS_CHANGED_HT; 1405 link->conf->ht_operation_mode = ht_opmode; 1406 } 1407 } 1408 1409 /* 1410 * Downgrade the new channel if we associated with restricted 1411 * bandwidth capabilities. For example, if we associated as a 1412 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1413 * or config reasons) then switching to a 40 MHz channel now 1414 * won't do us any good -- we couldn't use it with the AP. 1415 */ 1416 while (link->u.mgd.conn.bw_limit < 1417 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1418 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1419 1420 /* TPE element is not present in (re)assoc/ML reconfig response */ 1421 if (stype == IEEE80211_STYPE_BEACON && 1422 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1423 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1424 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1425 &chanreq.oper); 1426 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1427 link->conf->tpe = elems->tpe; 1428 *changed |= BSS_CHANGED_TPE; 1429 } 1430 } 1431 1432 /* 1433 * Beacons don't have the full information - we need to track 1434 * critical updates for NPCA parameters etc. For now only handle 1435 * association and link reconfiguration response. 1436 */ 1437 if (stype != IEEE80211_STYPE_BEACON && 1438 chanreq.oper.npca_chan && elems->uhr_operation && 1439 ieee80211_uhr_oper_size_ok((const void *)elems->uhr_operation, 1440 elems->uhr_operation_len, 1441 false)) { 1442 const struct ieee80211_uhr_npca_info *npca; 1443 struct ieee80211_bss_npca_params params = {}; 1444 1445 npca = ieee80211_uhr_npca_info(elems->uhr_operation); 1446 if (!npca) { 1447 chanreq.oper.npca_chan = NULL; 1448 chanreq.oper.npca_punctured = 0; 1449 } else { 1450 params.min_dur_thresh = 1451 le32_get_bits(npca->params, 1452 IEEE80211_UHR_NPCA_PARAMS_MIN_DUR_THRESH); 1453 params.switch_delay = 1454 le32_get_bits(npca->params, 1455 IEEE80211_UHR_NPCA_PARAMS_SWITCH_DELAY); 1456 params.switch_back_delay = 1457 le32_get_bits(npca->params, 1458 IEEE80211_UHR_NPCA_PARAMS_SWITCH_BACK_DELAY); 1459 params.init_qsrc = 1460 le32_get_bits(npca->params, 1461 IEEE80211_UHR_NPCA_PARAMS_INIT_QSRC); 1462 params.moplen = 1463 le32_get_bits(npca->params, 1464 IEEE80211_UHR_NPCA_PARAMS_MOPLEN); 1465 /* don't change the enabled bit yet */ 1466 params.enabled = link->conf->npca.enabled; 1467 } 1468 1469 if (memcmp(¶ms, &link->conf->npca, sizeof(params)) || 1470 !update) { 1471 link->conf->npca = params; 1472 *changed |= BSS_CHANGED_NPCA; 1473 } 1474 } 1475 1476 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) { 1477 if (update) 1478 goto update_npca; 1479 return 0; 1480 } 1481 1482 link_info(link, 1483 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1484 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1485 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1486 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1487 chanreq.oper.center_freq2); 1488 1489 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1490 sdata_info(sdata, 1491 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1492 link->u.mgd.bssid, frame); 1493 return -EINVAL; 1494 } 1495 1496 if (!update) { 1497 link->conf->chanreq = chanreq; 1498 return 0; 1499 } 1500 1501 /* 1502 * We're tracking the current AP here, so don't do any further checks 1503 * here. This keeps us from playing ping-pong with regulatory, without 1504 * it the following can happen (for example): 1505 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1506 * - AP advertises regdom US 1507 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1508 * - we detect an unsupported channel and disconnect 1509 * - disconnect causes CRDA to reload world regdomain and the game 1510 * starts anew. 1511 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1512 * 1513 * It seems possible that there are still scenarios with CSA or real 1514 * bandwidth changes where a this could happen, but those cases are 1515 * less common and wouldn't completely prevent using the AP. 1516 */ 1517 1518 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1519 if (ret) { 1520 sdata_info(sdata, 1521 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1522 link->u.mgd.bssid, frame); 1523 return ret; 1524 } 1525 1526 cfg80211_schedule_channels_check(&sdata->wdev); 1527 1528 update_npca: 1529 chanctx_conf = sdata_dereference(link->conf->chanctx_conf, sdata); 1530 /* must be non-NULL when update is true */ 1531 if (WARN_ON(!chanctx_conf)) 1532 return -EINVAL; 1533 1534 /* 1535 * If we're not associated yet (i.e. in the process associating) 1536 * then the chanctx code won't have enabled NPCA in the link, so 1537 * if the channel context was set up with NPCA for us, enable it. 1538 */ 1539 if (chanreq.oper.npca_chan && chanctx_conf->def.npca_chan && 1540 !link->conf->npca.enabled && !sdata->vif.cfg.assoc) { 1541 link->conf->npca.enabled = true; 1542 *changed |= BSS_CHANGED_NPCA; 1543 } 1544 1545 return 0; 1546 } 1547 1548 /* frame sending functions */ 1549 1550 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1551 struct sk_buff *skb, u8 ap_ht_param, 1552 struct ieee80211_supported_band *sband, 1553 struct ieee80211_channel *channel, 1554 enum ieee80211_smps_mode smps, 1555 const struct ieee80211_conn_settings *conn) 1556 { 1557 u8 *pos; 1558 u32 flags = channel->flags; 1559 u16 cap; 1560 struct ieee80211_sta_ht_cap ht_cap; 1561 1562 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1563 1564 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1565 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1566 1567 /* determine capability flags */ 1568 cap = ht_cap.cap; 1569 1570 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1571 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1572 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1573 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1574 cap &= ~IEEE80211_HT_CAP_SGI_40; 1575 } 1576 break; 1577 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1578 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1579 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1580 cap &= ~IEEE80211_HT_CAP_SGI_40; 1581 } 1582 break; 1583 } 1584 1585 /* 1586 * If 40 MHz was disabled associate as though we weren't 1587 * capable of 40 MHz -- some broken APs will never fall 1588 * back to trying to transmit in 20 MHz. 1589 */ 1590 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1591 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1592 cap &= ~IEEE80211_HT_CAP_SGI_40; 1593 } 1594 1595 /* set SM PS mode properly */ 1596 cap &= ~IEEE80211_HT_CAP_SM_PS; 1597 switch (smps) { 1598 case IEEE80211_SMPS_AUTOMATIC: 1599 case IEEE80211_SMPS_NUM_MODES: 1600 WARN_ON(1); 1601 fallthrough; 1602 case IEEE80211_SMPS_OFF: 1603 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1604 IEEE80211_HT_CAP_SM_PS_SHIFT; 1605 break; 1606 case IEEE80211_SMPS_STATIC: 1607 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1608 IEEE80211_HT_CAP_SM_PS_SHIFT; 1609 break; 1610 case IEEE80211_SMPS_DYNAMIC: 1611 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1612 IEEE80211_HT_CAP_SM_PS_SHIFT; 1613 break; 1614 } 1615 1616 /* reserve and fill IE */ 1617 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1618 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1619 } 1620 1621 /* This function determines vht capability flags for the association 1622 * and builds the IE. 1623 * Note - the function returns true to own the MU-MIMO capability 1624 */ 1625 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1626 struct sk_buff *skb, 1627 struct ieee80211_supported_band *sband, 1628 struct ieee80211_vht_cap *ap_vht_cap, 1629 const struct ieee80211_conn_settings *conn) 1630 { 1631 struct ieee80211_local *local = sdata->local; 1632 u8 *pos; 1633 u32 cap; 1634 struct ieee80211_sta_vht_cap vht_cap; 1635 u32 mask, ap_bf_sts, our_bf_sts; 1636 bool mu_mimo_owner = false; 1637 1638 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1639 1640 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1641 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1642 1643 /* determine capability flags */ 1644 cap = vht_cap.cap; 1645 1646 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1647 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1648 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1649 } 1650 1651 /* 1652 * Some APs apparently get confused if our capabilities are better 1653 * than theirs, so restrict what we advertise in the assoc request. 1654 */ 1655 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1656 if (!(ap_vht_cap->vht_cap_info & 1657 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1658 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1659 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1660 else if (!(ap_vht_cap->vht_cap_info & 1661 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1662 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1663 } 1664 1665 /* 1666 * If some other vif is using the MU-MIMO capability we cannot associate 1667 * using MU-MIMO - this will lead to contradictions in the group-id 1668 * mechanism. 1669 * Ownership is defined since association request, in order to avoid 1670 * simultaneous associations with MU-MIMO. 1671 */ 1672 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1673 bool disable_mu_mimo = false; 1674 struct ieee80211_sub_if_data *other; 1675 1676 list_for_each_entry(other, &local->interfaces, list) { 1677 if (other->vif.bss_conf.mu_mimo_owner) { 1678 disable_mu_mimo = true; 1679 break; 1680 } 1681 } 1682 if (disable_mu_mimo) 1683 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1684 else 1685 mu_mimo_owner = true; 1686 } 1687 1688 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1689 1690 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1691 our_bf_sts = cap & mask; 1692 1693 if (ap_bf_sts < our_bf_sts) { 1694 cap &= ~mask; 1695 cap |= ap_bf_sts; 1696 } 1697 1698 /* reserve and fill IE */ 1699 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1700 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1701 1702 return mu_mimo_owner; 1703 } 1704 1705 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1706 struct sk_buff *skb, 1707 enum nl80211_chan_width width, 1708 struct ieee80211_supported_band *sband, 1709 struct ieee80211_mgd_assoc_data *assoc_data) 1710 { 1711 u32 rates; 1712 1713 if (assoc_data->supp_rates_len && 1714 !ieee80211_hw_check(&local->hw, STRICT)) { 1715 /* 1716 * Get all rates supported by the device and the AP as 1717 * some APs don't like getting a superset of their rates 1718 * in the association request (e.g. D-Link DAP 1353 in 1719 * b-only mode)... 1720 */ 1721 ieee80211_parse_bitrates(sband, 1722 assoc_data->supp_rates, 1723 assoc_data->supp_rates_len, 1724 &rates); 1725 } else { 1726 /* 1727 * In case AP not provide any supported rates information 1728 * before association, we send information element(s) with 1729 * all rates that we support. 1730 */ 1731 rates = ~0; 1732 } 1733 1734 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1735 WLAN_EID_SUPP_RATES); 1736 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1737 WLAN_EID_EXT_SUPP_RATES); 1738 } 1739 1740 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1741 const u8 *elems, 1742 size_t elems_len, 1743 size_t offset) 1744 { 1745 size_t noffset; 1746 1747 static const u8 before_ht[] = { 1748 WLAN_EID_SSID, 1749 WLAN_EID_SUPP_RATES, 1750 WLAN_EID_EXT_SUPP_RATES, 1751 WLAN_EID_PWR_CAPABILITY, 1752 WLAN_EID_SUPPORTED_CHANNELS, 1753 WLAN_EID_RSN, 1754 WLAN_EID_QOS_CAPA, 1755 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1756 WLAN_EID_MOBILITY_DOMAIN, 1757 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1758 WLAN_EID_RIC_DATA, /* reassoc only */ 1759 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1760 }; 1761 static const u8 after_ric[] = { 1762 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1763 WLAN_EID_HT_CAPABILITY, 1764 WLAN_EID_BSS_COEX_2040, 1765 /* luckily this is almost always there */ 1766 WLAN_EID_EXT_CAPABILITY, 1767 WLAN_EID_QOS_TRAFFIC_CAPA, 1768 WLAN_EID_TIM_BCAST_REQ, 1769 WLAN_EID_INTERWORKING, 1770 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1771 WLAN_EID_VHT_CAPABILITY, 1772 WLAN_EID_OPMODE_NOTIF, 1773 }; 1774 1775 if (!elems_len) 1776 return offset; 1777 1778 noffset = ieee80211_ie_split_ric(elems, elems_len, 1779 before_ht, 1780 ARRAY_SIZE(before_ht), 1781 after_ric, 1782 ARRAY_SIZE(after_ric), 1783 offset); 1784 skb_put_data(skb, elems + offset, noffset - offset); 1785 1786 return noffset; 1787 } 1788 1789 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1790 const u8 *elems, 1791 size_t elems_len, 1792 size_t offset) 1793 { 1794 static const u8 before_vht[] = { 1795 /* 1796 * no need to list the ones split off before HT 1797 * or generated here 1798 */ 1799 WLAN_EID_BSS_COEX_2040, 1800 WLAN_EID_EXT_CAPABILITY, 1801 WLAN_EID_QOS_TRAFFIC_CAPA, 1802 WLAN_EID_TIM_BCAST_REQ, 1803 WLAN_EID_INTERWORKING, 1804 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1805 }; 1806 size_t noffset; 1807 1808 if (!elems_len) 1809 return offset; 1810 1811 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1812 noffset = ieee80211_ie_split(elems, elems_len, 1813 before_vht, ARRAY_SIZE(before_vht), 1814 offset); 1815 skb_put_data(skb, elems + offset, noffset - offset); 1816 1817 return noffset; 1818 } 1819 1820 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1821 const u8 *elems, 1822 size_t elems_len, 1823 size_t offset) 1824 { 1825 static const u8 before_he[] = { 1826 /* 1827 * no need to list the ones split off before VHT 1828 * or generated here 1829 */ 1830 WLAN_EID_OPMODE_NOTIF, 1831 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1832 /* 11ai elements */ 1833 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1834 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1835 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1836 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1837 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1838 /* TODO: add 11ah/11aj/11ak elements */ 1839 }; 1840 size_t noffset; 1841 1842 if (!elems_len) 1843 return offset; 1844 1845 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1846 noffset = ieee80211_ie_split(elems, elems_len, 1847 before_he, ARRAY_SIZE(before_he), 1848 offset); 1849 skb_put_data(skb, elems + offset, noffset - offset); 1850 1851 return noffset; 1852 } 1853 1854 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1855 const u8 *elems, size_t elems_len, 1856 size_t offset) 1857 { 1858 static const u8 before_reg_conn[] = { 1859 /* 1860 * no need to list the ones split off before HE 1861 * or generated here 1862 */ 1863 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1864 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1865 }; 1866 size_t noffset; 1867 1868 if (!elems_len) 1869 return offset; 1870 1871 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1872 ARRAY_SIZE(before_reg_conn), offset); 1873 skb_put_data(skb, elems + offset, noffset - offset); 1874 1875 return noffset; 1876 } 1877 1878 #define PRESENT_ELEMS_MAX 8 1879 #define PRESENT_ELEM_EXT_OFFS 0x100 1880 1881 static void 1882 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1883 struct sk_buff *skb, u16 capab, 1884 const struct element *ext_capa, 1885 const u16 *present_elems, 1886 struct ieee80211_mgd_assoc_data *assoc_data); 1887 1888 static size_t 1889 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1890 struct sk_buff *skb, u16 *capab, 1891 const struct element *ext_capa, 1892 const u8 *extra_elems, 1893 size_t extra_elems_len, 1894 unsigned int link_id, 1895 struct ieee80211_link_data *link, 1896 u16 *present_elems, 1897 struct ieee80211_mgd_assoc_data *assoc_data) 1898 { 1899 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1900 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1901 struct ieee80211_channel *chan = cbss->channel; 1902 const struct ieee80211_sband_iftype_data *iftd; 1903 struct ieee80211_local *local = sdata->local; 1904 struct ieee80211_supported_band *sband; 1905 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1906 struct ieee80211_chanctx_conf *chanctx_conf; 1907 enum ieee80211_smps_mode smps_mode; 1908 u16 orig_capab = *capab; 1909 size_t offset = 0; 1910 int present_elems_len = 0; 1911 u8 *pos; 1912 int i; 1913 1914 #define ADD_PRESENT_ELEM(id) do { \ 1915 /* need a last for termination - we use 0 == SSID */ \ 1916 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1917 present_elems[present_elems_len++] = (id); \ 1918 } while (0) 1919 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1920 1921 if (link) 1922 smps_mode = link->smps_mode; 1923 else if (sdata->u.mgd.powersave) 1924 smps_mode = IEEE80211_SMPS_DYNAMIC; 1925 else 1926 smps_mode = IEEE80211_SMPS_OFF; 1927 1928 if (link) { 1929 /* 1930 * 5/10 MHz scenarios are only viable without MLO, in which 1931 * case this pointer should be used ... All of this is a bit 1932 * unclear though, not sure this even works at all. 1933 */ 1934 rcu_read_lock(); 1935 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1936 if (chanctx_conf) 1937 width = chanctx_conf->def.width; 1938 rcu_read_unlock(); 1939 } 1940 1941 sband = local->hw.wiphy->bands[chan->band]; 1942 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1943 1944 if (sband->band == NL80211_BAND_2GHZ) { 1945 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1946 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1947 } 1948 1949 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1950 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1951 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1952 1953 if (sband->band != NL80211_BAND_S1GHZ) 1954 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1955 1956 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1957 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1958 struct cfg80211_chan_def chandef = { 1959 .width = width, 1960 .chan = chan, 1961 }; 1962 1963 pos = skb_put(skb, 4); 1964 *pos++ = WLAN_EID_PWR_CAPABILITY; 1965 *pos++ = 2; 1966 *pos++ = 0; /* min tx power */ 1967 /* max tx power */ 1968 *pos++ = ieee80211_chandef_max_power(&chandef); 1969 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1970 } 1971 1972 /* 1973 * Per spec, we shouldn't include the list of channels if we advertise 1974 * support for extended channel switching, but we've always done that; 1975 * (for now?) apply this restriction only on the (new) 6 GHz band. 1976 */ 1977 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1978 (sband->band != NL80211_BAND_6GHZ || 1979 !ext_capa || ext_capa->datalen < 1 || 1980 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1981 /* TODO: get this in reg domain format */ 1982 pos = skb_put(skb, 2 * sband->n_channels + 2); 1983 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1984 *pos++ = 2 * sband->n_channels; 1985 for (i = 0; i < sband->n_channels; i++) { 1986 int cf = sband->channels[i].center_freq; 1987 1988 *pos++ = ieee80211_frequency_to_channel(cf); 1989 *pos++ = 1; /* one channel in the subband*/ 1990 } 1991 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1992 } 1993 1994 /* if present, add any custom IEs that go before HT */ 1995 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1996 extra_elems_len, 1997 offset); 1998 1999 if (sband->band != NL80211_BAND_6GHZ && 2000 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 2001 ieee80211_add_ht_ie(sdata, skb, 2002 assoc_data->link[link_id].ap_ht_param, 2003 sband, chan, smps_mode, 2004 &assoc_data->link[link_id].conn); 2005 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 2006 } 2007 2008 /* if present, add any custom IEs that go before VHT */ 2009 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 2010 extra_elems_len, 2011 offset); 2012 2013 if (sband->band != NL80211_BAND_6GHZ && 2014 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 2015 sband->vht_cap.vht_supported) { 2016 bool mu_mimo_owner = 2017 ieee80211_add_vht_ie(sdata, skb, sband, 2018 &assoc_data->link[link_id].ap_vht_cap, 2019 &assoc_data->link[link_id].conn); 2020 2021 if (link) 2022 link->conf->mu_mimo_owner = mu_mimo_owner; 2023 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 2024 } 2025 2026 /* if present, add any custom IEs that go before HE */ 2027 offset = ieee80211_add_before_he_elems(skb, extra_elems, 2028 extra_elems_len, 2029 offset); 2030 2031 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 2032 ieee80211_put_he_cap(skb, sdata, sband, 2033 &assoc_data->link[link_id].conn); 2034 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 2035 if (sband->band == NL80211_BAND_6GHZ) 2036 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 2037 } 2038 2039 /* 2040 * if present, add any custom IEs that go before regulatory 2041 * connectivity element 2042 */ 2043 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 2044 extra_elems_len, offset); 2045 2046 if (sband->band == NL80211_BAND_6GHZ) { 2047 /* 2048 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 2049 * capable of operating on the 6 GHz band shall transmit 2050 * regulatory connectivity element. 2051 */ 2052 ieee80211_put_reg_conn(skb, chan->flags); 2053 } 2054 2055 /* 2056 * careful - need to know about all the present elems before 2057 * calling ieee80211_assoc_add_ml_elem(), so add these if 2058 * we're going to put them after the ML element 2059 */ 2060 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 2061 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 2062 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 2063 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_UHR_CAPA); 2064 2065 if (link_id == assoc_data->assoc_link_id) 2066 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 2067 present_elems, assoc_data); 2068 2069 /* crash if somebody gets it wrong */ 2070 present_elems = NULL; 2071 2072 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 2073 ieee80211_put_eht_cap(skb, sdata, sband, 2074 &assoc_data->link[link_id].conn); 2075 2076 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 2077 ieee80211_put_uhr_cap(skb, sdata, sband); 2078 2079 if (sband->band == NL80211_BAND_S1GHZ) { 2080 ieee80211_add_aid_request_ie(sdata, skb); 2081 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 2082 } 2083 2084 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 2085 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 2086 2087 return offset; 2088 } 2089 2090 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 2091 const u16 *outer, 2092 const u16 *inner) 2093 { 2094 unsigned int skb_len = skb->len; 2095 bool at_extension = false; 2096 bool added = false; 2097 int i, j; 2098 u8 *len, *list_len = NULL; 2099 2100 skb_put_u8(skb, WLAN_EID_EXTENSION); 2101 len = skb_put(skb, 1); 2102 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 2103 2104 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 2105 u16 elem = outer[i]; 2106 bool have_inner = false; 2107 2108 /* should at least be sorted in the sense of normal -> ext */ 2109 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 2110 2111 /* switch to extension list */ 2112 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 2113 at_extension = true; 2114 if (!list_len) 2115 skb_put_u8(skb, 0); 2116 list_len = NULL; 2117 } 2118 2119 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 2120 if (elem == inner[j]) { 2121 have_inner = true; 2122 break; 2123 } 2124 } 2125 2126 if (have_inner) 2127 continue; 2128 2129 if (!list_len) { 2130 list_len = skb_put(skb, 1); 2131 *list_len = 0; 2132 } 2133 *list_len += 1; 2134 skb_put_u8(skb, (u8)elem); 2135 added = true; 2136 } 2137 2138 /* if we added a list but no extension list, make a zero-len one */ 2139 if (added && (!at_extension || !list_len)) 2140 skb_put_u8(skb, 0); 2141 2142 /* if nothing added remove extension element completely */ 2143 if (!added) 2144 skb_trim(skb, skb_len); 2145 else 2146 *len = skb->len - skb_len - 2; 2147 } 2148 2149 static void 2150 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 2151 struct sk_buff *skb, u16 capab, 2152 const struct element *ext_capa, 2153 const u16 *outer_present_elems, 2154 struct ieee80211_mgd_assoc_data *assoc_data) 2155 { 2156 struct ieee80211_local *local = sdata->local; 2157 struct ieee80211_multi_link_elem *ml_elem; 2158 struct ieee80211_mle_basic_common_info *common; 2159 const struct wiphy_iftype_ext_capab *ift_ext_capa; 2160 __le16 eml_capa = 0, mld_capa_ops = 0; 2161 unsigned int link_id; 2162 u8 *ml_elem_len; 2163 void *capab_pos; 2164 2165 if (!ieee80211_vif_is_mld(&sdata->vif)) 2166 return; 2167 2168 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 2169 ieee80211_vif_type_p2p(&sdata->vif)); 2170 if (ift_ext_capa) { 2171 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 2172 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 2173 } 2174 2175 skb_put_u8(skb, WLAN_EID_EXTENSION); 2176 ml_elem_len = skb_put(skb, 1); 2177 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2178 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2179 ml_elem->control = 2180 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2181 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2182 common = skb_put(skb, sizeof(*common)); 2183 common->len = sizeof(*common) + 2184 2; /* MLD capa/ops */ 2185 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2186 2187 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2188 if (eml_capa & 2189 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2190 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2191 common->len += 2; /* EML capabilities */ 2192 ml_elem->control |= 2193 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2194 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2195 } 2196 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2197 2198 if (assoc_data->ext_mld_capa_ops) { 2199 ml_elem->control |= 2200 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2201 common->len += 2; 2202 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2203 sizeof(assoc_data->ext_mld_capa_ops)); 2204 } 2205 2206 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2207 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2208 const u8 *extra_elems; 2209 size_t extra_elems_len; 2210 size_t extra_used; 2211 u8 *subelem_len = NULL; 2212 __le16 ctrl; 2213 2214 if (!assoc_data->link[link_id].bss || 2215 link_id == assoc_data->assoc_link_id) 2216 continue; 2217 2218 extra_elems = assoc_data->link[link_id].elems; 2219 extra_elems_len = assoc_data->link[link_id].elems_len; 2220 2221 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2222 subelem_len = skb_put(skb, 1); 2223 2224 ctrl = cpu_to_le16(link_id | 2225 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2226 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2227 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2228 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2229 skb_put_data(skb, assoc_data->link[link_id].addr, 2230 ETH_ALEN); 2231 /* 2232 * Now add the contents of the (re)association request, 2233 * but the "listen interval" and "current AP address" 2234 * (if applicable) are skipped. So we only have 2235 * the capability field (remember the position and fill 2236 * later), followed by the elements added below by 2237 * calling ieee80211_add_link_elems(). 2238 */ 2239 capab_pos = skb_put(skb, 2); 2240 2241 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2242 ext_capa, 2243 extra_elems, 2244 extra_elems_len, 2245 link_id, NULL, 2246 link_present_elems, 2247 assoc_data); 2248 if (extra_elems) 2249 skb_put_data(skb, extra_elems + extra_used, 2250 extra_elems_len - extra_used); 2251 2252 put_unaligned_le16(capab, capab_pos); 2253 2254 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2255 link_present_elems); 2256 2257 ieee80211_fragment_element(skb, subelem_len, 2258 IEEE80211_MLE_SUBELEM_FRAGMENT); 2259 } 2260 2261 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2262 } 2263 2264 static int 2265 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2266 enum nl80211_iftype iftype, 2267 struct cfg80211_bss *cbss, 2268 size_t elems_len) 2269 { 2270 struct ieee80211_local *local = sdata->local; 2271 const struct ieee80211_sband_iftype_data *iftd; 2272 struct ieee80211_supported_band *sband; 2273 size_t size = 0; 2274 2275 if (!cbss) 2276 return size; 2277 2278 sband = local->hw.wiphy->bands[cbss->channel->band]; 2279 2280 /* add STA profile elements length */ 2281 size += elems_len; 2282 2283 /* and supported rates length */ 2284 size += 4 + sband->n_bitrates; 2285 2286 /* supported channels */ 2287 size += 2 + 2 * sband->n_channels; 2288 2289 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2290 if (iftd) 2291 size += iftd->vendor_elems.len; 2292 2293 /* power capability */ 2294 size += 4; 2295 2296 /* HT, VHT, HE, EHT */ 2297 size += 2 + sizeof(struct ieee80211_ht_cap); 2298 size += 2 + sizeof(struct ieee80211_vht_cap); 2299 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2300 sizeof(struct ieee80211_he_mcs_nss_supp) + 2301 IEEE80211_HE_PPE_THRES_MAX_LEN; 2302 2303 if (sband->band == NL80211_BAND_6GHZ) { 2304 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2305 /* reg connection */ 2306 size += 4; 2307 } 2308 2309 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2310 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2311 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2312 2313 size += 2 + 1 + sizeof(struct ieee80211_uhr_cap); 2314 2315 return size; 2316 } 2317 2318 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2319 { 2320 struct ieee80211_local *local = sdata->local; 2321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2322 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2323 struct ieee80211_link_data *link; 2324 struct sk_buff *skb; 2325 struct ieee80211_mgmt *mgmt; 2326 u8 *pos, qos_info, *ie_start; 2327 size_t offset, noffset; 2328 u16 capab = 0, link_capab; 2329 __le16 listen_int; 2330 struct element *ext_capa = NULL; 2331 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2332 struct ieee80211_prep_tx_info info = {}; 2333 unsigned int link_id, n_links = 0; 2334 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2335 struct sta_info *sta; 2336 bool assoc_encrypt; 2337 void *capab_pos; 2338 size_t size; 2339 int ret; 2340 2341 /* we know it's writable, cast away the const */ 2342 if (assoc_data->ie_len) 2343 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2344 assoc_data->ie, 2345 assoc_data->ie_len); 2346 2347 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2348 2349 size = local->hw.extra_tx_headroom + 2350 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2351 2 + assoc_data->ssid_len + /* SSID */ 2352 assoc_data->ie_len + /* extra IEs */ 2353 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2354 9; /* WMM */ 2355 2356 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2357 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2358 size_t elems_len = assoc_data->link[link_id].elems_len; 2359 2360 if (!cbss) 2361 continue; 2362 2363 n_links++; 2364 2365 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2366 elems_len); 2367 2368 /* non-inheritance element */ 2369 size += 2 + 2 + PRESENT_ELEMS_MAX; 2370 2371 /* should be the same across all BSSes */ 2372 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2373 capab |= WLAN_CAPABILITY_PRIVACY; 2374 } 2375 2376 if (ieee80211_vif_is_mld(&sdata->vif)) { 2377 /* consider the multi-link element with STA profile */ 2378 size += sizeof(struct ieee80211_multi_link_elem); 2379 /* max common info field in basic multi-link element */ 2380 size += sizeof(struct ieee80211_mle_basic_common_info) + 2381 2 + /* capa & op */ 2382 2 + /* ext capa & op */ 2383 2; /* EML capa */ 2384 2385 /* The capability elements were already considered above */ 2386 size += (n_links - 1) * 2387 (1 + 1 + /* subelement ID/length */ 2388 2 + /* STA control */ 2389 1 + ETH_ALEN + 2 /* STA Info field */); 2390 } 2391 2392 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2393 if (WARN_ON(!link)) 2394 return -EINVAL; 2395 2396 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2397 return -EINVAL; 2398 2399 skb = alloc_skb(size, GFP_KERNEL); 2400 if (!skb) 2401 return -ENOMEM; 2402 2403 skb_reserve(skb, local->hw.extra_tx_headroom); 2404 2405 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2406 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2407 2408 /* Set MBSSID support for HE AP if needed */ 2409 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2410 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2411 ext_capa && ext_capa->datalen >= 3) 2412 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2413 2414 mgmt = skb_put_zero(skb, 24); 2415 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2416 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2417 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2418 2419 listen_int = cpu_to_le16(assoc_data->s1g ? 2420 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2421 local->hw.conf.listen_interval); 2422 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2423 skb_put(skb, 10); 2424 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2425 IEEE80211_STYPE_REASSOC_REQ); 2426 capab_pos = &mgmt->u.reassoc_req.capab_info; 2427 mgmt->u.reassoc_req.listen_interval = listen_int; 2428 memcpy(mgmt->u.reassoc_req.current_ap, 2429 assoc_data->prev_ap_addr, ETH_ALEN); 2430 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2431 } else { 2432 skb_put(skb, 4); 2433 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2434 IEEE80211_STYPE_ASSOC_REQ); 2435 capab_pos = &mgmt->u.assoc_req.capab_info; 2436 mgmt->u.assoc_req.listen_interval = listen_int; 2437 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2438 } 2439 2440 /* SSID */ 2441 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2442 ie_start = pos; 2443 *pos++ = WLAN_EID_SSID; 2444 *pos++ = assoc_data->ssid_len; 2445 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2446 2447 /* 2448 * This bit is technically reserved, so it shouldn't matter for either 2449 * the AP or us, but it also means we shouldn't set it. However, we've 2450 * always set it in the past, and apparently some EHT APs check that 2451 * we don't set it. To avoid interoperability issues with old APs that 2452 * for some reason check it and want it to be set, set the bit for all 2453 * pre-EHT connections as we used to do. 2454 */ 2455 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2456 !ieee80211_hw_check(&local->hw, STRICT)) 2457 capab |= WLAN_CAPABILITY_ESS; 2458 2459 /* add the elements for the assoc (main) link */ 2460 link_capab = capab; 2461 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2462 ext_capa, 2463 assoc_data->ie, 2464 assoc_data->ie_len, 2465 assoc_data->assoc_link_id, link, 2466 present_elems, assoc_data); 2467 put_unaligned_le16(link_capab, capab_pos); 2468 2469 /* if present, add any custom non-vendor IEs */ 2470 if (assoc_data->ie_len) { 2471 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2472 assoc_data->ie_len, 2473 offset); 2474 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2475 offset = noffset; 2476 } 2477 2478 if (assoc_data->wmm) { 2479 if (assoc_data->uapsd) { 2480 qos_info = ifmgd->uapsd_queues; 2481 qos_info |= (ifmgd->uapsd_max_sp_len << 2482 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2483 } else { 2484 qos_info = 0; 2485 } 2486 2487 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2488 } 2489 2490 /* add any remaining custom (i.e. vendor specific here) IEs */ 2491 if (assoc_data->ie_len) { 2492 noffset = assoc_data->ie_len; 2493 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2494 } 2495 2496 if (assoc_data->fils_kek_len) { 2497 ret = fils_encrypt_assoc_req(skb, assoc_data); 2498 if (ret < 0) { 2499 dev_kfree_skb(skb); 2500 return ret; 2501 } 2502 } 2503 2504 pos = skb_tail_pointer(skb); 2505 kfree(ifmgd->assoc_req_ies); 2506 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2507 if (!ifmgd->assoc_req_ies) { 2508 dev_kfree_skb(skb); 2509 return -ENOMEM; 2510 } 2511 2512 ifmgd->assoc_req_ies_len = pos - ie_start; 2513 2514 info.link_id = assoc_data->assoc_link_id; 2515 drv_mgd_prepare_tx(local, sdata, &info); 2516 2517 sta = sta_info_get_bss(sdata, sdata->vif.cfg.ap_addr); 2518 2519 assoc_encrypt = sta && sta->sta.epp_peer && 2520 wiphy_dereference(sdata->local->hw.wiphy, 2521 sta->ptk[sta->ptk_idx]); 2522 2523 if (!assoc_encrypt) 2524 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2525 2526 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2527 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2528 IEEE80211_TX_INTFL_MLME_CONN_TX; 2529 ieee80211_tx_skb(sdata, skb); 2530 2531 return 0; 2532 } 2533 2534 void ieee80211_send_pspoll(struct ieee80211_local *local, 2535 struct ieee80211_sub_if_data *sdata) 2536 { 2537 struct ieee80211_pspoll *pspoll; 2538 struct sk_buff *skb; 2539 2540 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2541 if (!skb) 2542 return; 2543 2544 pspoll = (struct ieee80211_pspoll *) skb->data; 2545 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2546 2547 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2548 ieee80211_tx_skb(sdata, skb); 2549 } 2550 2551 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2552 struct ieee80211_sub_if_data *sdata, 2553 bool powersave) 2554 { 2555 struct sk_buff *skb; 2556 struct ieee80211_hdr_3addr *nullfunc; 2557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2558 2559 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2560 !ieee80211_hw_check(&local->hw, 2561 DOESNT_SUPPORT_QOS_NDP)); 2562 if (!skb) 2563 return; 2564 2565 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2566 if (powersave) 2567 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2568 2569 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2570 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2571 2572 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2573 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2574 2575 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2576 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2577 2578 ieee80211_tx_skb(sdata, skb); 2579 } 2580 2581 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2582 struct ieee80211_sub_if_data *sdata) 2583 { 2584 struct sk_buff *skb; 2585 struct ieee80211_hdr *nullfunc; 2586 __le16 fc; 2587 2588 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2589 return; 2590 2591 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2592 if (!skb) 2593 return; 2594 2595 skb_reserve(skb, local->hw.extra_tx_headroom); 2596 2597 nullfunc = skb_put_zero(skb, 30); 2598 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2599 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2600 nullfunc->frame_control = fc; 2601 memcpy(nullfunc->addr1, sdata->vif.cfg.ap_addr, ETH_ALEN); 2602 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2603 memcpy(nullfunc->addr3, sdata->vif.cfg.ap_addr, ETH_ALEN); 2604 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2605 2606 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2607 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2608 ieee80211_tx_skb(sdata, skb); 2609 } 2610 2611 /* spectrum management related things */ 2612 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2613 struct wiphy_work *work) 2614 { 2615 struct ieee80211_link_data *link = 2616 container_of(work, struct ieee80211_link_data, 2617 u.mgd.csa.switch_work.work); 2618 struct ieee80211_sub_if_data *sdata = link->sdata; 2619 struct ieee80211_local *local = sdata->local; 2620 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2621 int ret; 2622 2623 if (!ieee80211_sdata_running(sdata)) 2624 return; 2625 2626 lockdep_assert_wiphy(local->hw.wiphy); 2627 2628 if (!ifmgd->associated) 2629 return; 2630 2631 if (!link->conf->csa_active) 2632 return; 2633 2634 /* 2635 * If the link isn't active (now), we cannot wait for beacons, won't 2636 * have a reserved chanctx, etc. Just switch over the chandef and 2637 * update cfg80211 directly. 2638 */ 2639 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2640 struct link_sta_info *link_sta; 2641 struct sta_info *ap_sta; 2642 2643 link->conf->chanreq = link->csa.chanreq; 2644 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2645 link->link_id); 2646 link->conf->csa_active = false; 2647 2648 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2649 if (WARN_ON(!ap_sta)) 2650 return; 2651 2652 link_sta = wiphy_dereference(wiphy, 2653 ap_sta->link[link->link_id]); 2654 if (WARN_ON(!link_sta)) 2655 return; 2656 2657 link_sta->pub->bandwidth = 2658 ieee80211_sta_current_bw(link_sta, 2659 &link->csa.chanreq.oper, 2660 IEEE80211_STA_BW_TX_TO_STA); 2661 return; 2662 } 2663 2664 /* 2665 * using reservation isn't immediate as it may be deferred until later 2666 * with multi-vif. once reservation is complete it will re-schedule the 2667 * work with no reserved_chanctx so verify chandef to check if it 2668 * completed successfully 2669 */ 2670 2671 if (link->reserved_chanctx) { 2672 /* 2673 * with multi-vif csa driver may call ieee80211_csa_finish() 2674 * many times while waiting for other interfaces to use their 2675 * reservations 2676 */ 2677 if (link->reserved_ready) 2678 return; 2679 2680 ret = ieee80211_link_use_reserved_context(link); 2681 if (ret) { 2682 link_info(link, 2683 "failed to use reserved channel context, disconnecting (err=%d)\n", 2684 ret); 2685 wiphy_work_queue(sdata->local->hw.wiphy, 2686 &ifmgd->csa_connection_drop_work); 2687 } 2688 return; 2689 } 2690 2691 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2692 &link->csa.chanreq)) { 2693 link_info(link, 2694 "failed to finalize channel switch, disconnecting\n"); 2695 wiphy_work_queue(sdata->local->hw.wiphy, 2696 &ifmgd->csa_connection_drop_work); 2697 return; 2698 } 2699 2700 link->u.mgd.csa.waiting_bcn = true; 2701 2702 /* 2703 * The next beacon really should always be different, so this should 2704 * have no effect whatsoever. However, some APs (we observed this in 2705 * an Asus AXE11000), the beacon after the CSA might be identical to 2706 * the last beacon on the old channel - in this case we'd ignore it. 2707 * Resetting the CRC will lead us to handle it better (albeit with a 2708 * disconnect, but clearly the AP is broken.) 2709 */ 2710 link->u.mgd.beacon_crc_valid = false; 2711 2712 /* apply new TPE restrictions immediately on the new channel */ 2713 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2714 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2715 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2716 &link->u.mgd.csa.ap_chandef, 2717 &link->conf->chanreq.oper); 2718 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2719 sizeof(link->u.mgd.csa.tpe))) { 2720 link->conf->tpe = link->u.mgd.csa.tpe; 2721 ieee80211_link_info_change_notify(sdata, link, 2722 BSS_CHANGED_TPE); 2723 } 2724 } 2725 2726 /* 2727 * It is not necessary to reset these timers if any link does not 2728 * have an active CSA and that link still receives the beacons 2729 * when other links have active CSA. 2730 */ 2731 for_each_link_data(sdata, link) { 2732 if (!link->conf->csa_active) 2733 return; 2734 } 2735 2736 /* 2737 * Reset the beacon monitor and connection monitor timers when CSA 2738 * is active for all links in MLO when channel switch occurs in all 2739 * the links. 2740 */ 2741 ieee80211_sta_reset_beacon_monitor(sdata); 2742 ieee80211_sta_reset_conn_monitor(sdata); 2743 } 2744 2745 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2746 { 2747 struct ieee80211_sub_if_data *sdata = link->sdata; 2748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2749 int ret; 2750 2751 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2752 2753 WARN_ON(!link->conf->csa_active); 2754 2755 ieee80211_vif_unblock_queues_csa(sdata); 2756 2757 link->conf->csa_active = false; 2758 link->u.mgd.csa.blocked_tx = false; 2759 link->u.mgd.csa.waiting_bcn = false; 2760 2761 ret = drv_post_channel_switch(link); 2762 if (ret) { 2763 link_info(link, 2764 "driver post channel switch failed, disconnecting\n"); 2765 wiphy_work_queue(sdata->local->hw.wiphy, 2766 &ifmgd->csa_connection_drop_work); 2767 return; 2768 } 2769 2770 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2771 link->link_id); 2772 } 2773 2774 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2775 unsigned int link_id) 2776 { 2777 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2778 2779 trace_api_chswitch_done(sdata, success, link_id); 2780 2781 rcu_read_lock(); 2782 2783 if (!success) { 2784 sdata_info(sdata, 2785 "driver channel switch failed (link %d), disconnecting\n", 2786 link_id); 2787 wiphy_work_queue(sdata->local->hw.wiphy, 2788 &sdata->u.mgd.csa_connection_drop_work); 2789 } else { 2790 struct ieee80211_link_data *link = 2791 rcu_dereference(sdata->link[link_id]); 2792 2793 if (WARN_ON(!link)) { 2794 rcu_read_unlock(); 2795 return; 2796 } 2797 2798 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 2799 &link->u.mgd.csa.switch_work, 0); 2800 } 2801 2802 rcu_read_unlock(); 2803 } 2804 EXPORT_SYMBOL(ieee80211_chswitch_done); 2805 2806 static void 2807 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2808 { 2809 struct ieee80211_sub_if_data *sdata = link->sdata; 2810 struct ieee80211_local *local = sdata->local; 2811 2812 lockdep_assert_wiphy(local->hw.wiphy); 2813 2814 if (!local->ops->abort_channel_switch) 2815 return; 2816 2817 if (rcu_access_pointer(link->conf->chanctx_conf)) 2818 ieee80211_link_unreserve_chanctx(link); 2819 2820 ieee80211_vif_unblock_queues_csa(sdata); 2821 2822 link->conf->csa_active = false; 2823 link->u.mgd.csa.blocked_tx = false; 2824 2825 drv_abort_channel_switch(link); 2826 } 2827 2828 struct sta_csa_rnr_iter_data { 2829 struct ieee80211_link_data *link; 2830 struct ieee80211_channel *chan; 2831 u8 mld_id; 2832 }; 2833 2834 static enum cfg80211_rnr_iter_ret 2835 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2836 const struct ieee80211_neighbor_ap_info *info, 2837 const u8 *tbtt_info, u8 tbtt_info_len) 2838 { 2839 struct sta_csa_rnr_iter_data *data = _data; 2840 struct ieee80211_link_data *link = data->link; 2841 struct ieee80211_sub_if_data *sdata = link->sdata; 2842 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2843 const struct ieee80211_tbtt_info_ge_11 *ti; 2844 enum nl80211_band band; 2845 unsigned int center_freq; 2846 int link_id; 2847 2848 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2849 return RNR_ITER_CONTINUE; 2850 2851 if (tbtt_info_len < sizeof(*ti)) 2852 return RNR_ITER_CONTINUE; 2853 2854 ti = (const void *)tbtt_info; 2855 2856 if (ti->mld_params.mld_id != data->mld_id) 2857 return RNR_ITER_CONTINUE; 2858 2859 link_id = le16_get_bits(ti->mld_params.params, 2860 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2861 if (link_id != data->link->link_id) 2862 return RNR_ITER_CONTINUE; 2863 2864 /* we found the entry for our link! */ 2865 2866 /* this AP is confused, it had this right before ... just disconnect */ 2867 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2868 link_info(link, 2869 "AP now has invalid operating class in RNR, disconnect\n"); 2870 wiphy_work_queue(sdata->local->hw.wiphy, 2871 &ifmgd->csa_connection_drop_work); 2872 return RNR_ITER_BREAK; 2873 } 2874 2875 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2876 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2877 2878 return RNR_ITER_BREAK; 2879 } 2880 2881 static void 2882 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2883 struct ieee802_11_elems *elems) 2884 { 2885 struct ieee80211_sub_if_data *sdata = link->sdata; 2886 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2887 struct sta_csa_rnr_iter_data data = { 2888 .link = link, 2889 }; 2890 2891 /* 2892 * If we get here, we see a beacon from another link without 2893 * CSA still being reported for it, so now we have to check 2894 * if the CSA was aborted or completed. This may not even be 2895 * perfectly possible if the CSA was only done for changing 2896 * the puncturing, but in that case if the link in inactive 2897 * we don't really care, and if it's an active link (or when 2898 * it's activated later) we'll get a beacon and adjust. 2899 */ 2900 2901 if (WARN_ON(!elems->ml_basic)) 2902 return; 2903 2904 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2905 2906 /* 2907 * So in order to do this, iterate the RNR element(s) and see 2908 * what channel is reported now. 2909 */ 2910 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2911 ieee80211_sta_csa_rnr_iter, &data); 2912 2913 if (!data.chan) { 2914 link_info(link, 2915 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2916 wiphy_work_queue(sdata->local->hw.wiphy, 2917 &ifmgd->csa_connection_drop_work); 2918 return; 2919 } 2920 2921 /* 2922 * If it doesn't match the CSA, then assume it aborted. This 2923 * may erroneously detect that it was _not_ aborted when it 2924 * was in fact aborted, but only changed the bandwidth or the 2925 * puncturing configuration, but we don't have enough data to 2926 * detect that. 2927 */ 2928 if (data.chan != link->csa.chanreq.oper.chan) 2929 ieee80211_sta_abort_chanswitch(link); 2930 } 2931 2932 enum ieee80211_csa_source { 2933 IEEE80211_CSA_SOURCE_BEACON, 2934 IEEE80211_CSA_SOURCE_OTHER_LINK, 2935 IEEE80211_CSA_SOURCE_PROT_ACTION, 2936 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2937 }; 2938 2939 static void 2940 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2941 u64 timestamp, u32 device_timestamp, 2942 struct ieee802_11_elems *full_elems, 2943 struct ieee802_11_elems *csa_elems, 2944 enum ieee80211_csa_source source) 2945 { 2946 struct ieee80211_sub_if_data *sdata = link->sdata; 2947 struct ieee80211_local *local = sdata->local; 2948 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2949 struct ieee80211_chanctx *chanctx = NULL; 2950 struct ieee80211_chanctx_conf *conf; 2951 struct ieee80211_csa_ie csa_ie = {}; 2952 struct ieee80211_channel_switch ch_switch = { 2953 .link_id = link->link_id, 2954 .timestamp = timestamp, 2955 .device_timestamp = device_timestamp, 2956 }; 2957 u32 csa_time_tu; 2958 ktime_t now; 2959 int res; 2960 2961 lockdep_assert_wiphy(local->hw.wiphy); 2962 2963 if (csa_elems) { 2964 struct cfg80211_bss *cbss = link->conf->bss; 2965 enum nl80211_band current_band; 2966 struct ieee80211_bss *bss; 2967 2968 if (WARN_ON(!cbss)) 2969 return; 2970 2971 current_band = cbss->channel->band; 2972 bss = (void *)cbss->priv; 2973 2974 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2975 current_band, 2976 bss->vht_cap_info, 2977 &link->u.mgd.conn, 2978 link->u.mgd.bssid, 2979 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2980 &csa_ie); 2981 if (res == 0) { 2982 ch_switch.block_tx = csa_ie.mode; 2983 ch_switch.chandef = csa_ie.chanreq.oper; 2984 ch_switch.count = csa_ie.count; 2985 ch_switch.delay = csa_ie.max_switch_time; 2986 } 2987 2988 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2989 } else { 2990 /* 2991 * If there was no per-STA profile for this link, we 2992 * get called with csa_elems == NULL. This of course means 2993 * there are no CSA elements, so set res=1 indicating 2994 * no more CSA. 2995 */ 2996 res = 1; 2997 } 2998 2999 if (res < 0) { 3000 /* ignore this case, not a protected frame */ 3001 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 3002 return; 3003 goto drop_connection; 3004 } 3005 3006 if (link->conf->csa_active) { 3007 switch (source) { 3008 case IEEE80211_CSA_SOURCE_PROT_ACTION: 3009 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 3010 /* already processing - disregard action frames */ 3011 return; 3012 case IEEE80211_CSA_SOURCE_BEACON: 3013 if (link->u.mgd.csa.waiting_bcn) { 3014 ieee80211_chswitch_post_beacon(link); 3015 /* 3016 * If the CSA is still present after the switch 3017 * we need to consider it as a new CSA (possibly 3018 * to self). This happens by not returning here 3019 * so we'll get to the check below. 3020 */ 3021 } else if (res) { 3022 ieee80211_sta_abort_chanswitch(link); 3023 return; 3024 } else { 3025 drv_channel_switch_rx_beacon(sdata, &ch_switch); 3026 return; 3027 } 3028 break; 3029 case IEEE80211_CSA_SOURCE_OTHER_LINK: 3030 /* active link: we want to see the beacon to continue */ 3031 if (ieee80211_vif_link_active(&sdata->vif, 3032 link->link_id)) 3033 return; 3034 3035 /* switch work ran, so just complete the process */ 3036 if (link->u.mgd.csa.waiting_bcn) { 3037 ieee80211_chswitch_post_beacon(link); 3038 /* 3039 * If the CSA is still present after the switch 3040 * we need to consider it as a new CSA (possibly 3041 * to self). This happens by not returning here 3042 * so we'll get to the check below. 3043 */ 3044 break; 3045 } 3046 3047 /* link still has CSA but we already know, do nothing */ 3048 if (!res) 3049 return; 3050 3051 /* check in the RNR if the CSA aborted */ 3052 ieee80211_sta_other_link_csa_disappeared(link, 3053 full_elems); 3054 return; 3055 } 3056 } 3057 3058 /* no active CSA nor a new one */ 3059 if (res) { 3060 /* 3061 * However, we may have stopped queues when receiving a public 3062 * action frame that couldn't be protected, if it had the quiet 3063 * bit set. This is a trade-off, we want to be quiet as soon as 3064 * possible, but also don't trust the public action frame much, 3065 * as it can't be protected. 3066 */ 3067 if (unlikely(link->u.mgd.csa.blocked_tx)) { 3068 link->u.mgd.csa.blocked_tx = false; 3069 ieee80211_vif_unblock_queues_csa(sdata); 3070 } 3071 return; 3072 } 3073 3074 /* 3075 * We don't really trust public action frames, but block queues (go to 3076 * quiet mode) for them anyway, we should get a beacon soon to either 3077 * know what the CSA really is, or figure out the public action frame 3078 * was actually an attack. 3079 */ 3080 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 3081 if (csa_ie.mode) { 3082 link->u.mgd.csa.blocked_tx = true; 3083 ieee80211_vif_block_queues_csa(sdata); 3084 } 3085 return; 3086 } 3087 3088 if (link->conf->chanreq.oper.chan->band != 3089 csa_ie.chanreq.oper.chan->band) { 3090 link_info(link, 3091 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 3092 link->u.mgd.bssid, 3093 csa_ie.chanreq.oper.chan->center_freq, 3094 csa_ie.chanreq.oper.width, 3095 csa_ie.chanreq.oper.center_freq1, 3096 csa_ie.chanreq.oper.center_freq2); 3097 goto drop_connection; 3098 } 3099 3100 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 3101 IEEE80211_CHAN_DISABLED)) { 3102 link_info(link, 3103 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 3104 link->u.mgd.bssid, 3105 csa_ie.chanreq.oper.chan->center_freq, 3106 csa_ie.chanreq.oper.chan->freq_offset, 3107 csa_ie.chanreq.oper.width, 3108 csa_ie.chanreq.oper.center_freq1, 3109 csa_ie.chanreq.oper.freq1_offset, 3110 csa_ie.chanreq.oper.center_freq2); 3111 goto drop_connection; 3112 } 3113 3114 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 3115 &link->conf->chanreq.oper) && 3116 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 3117 if (link->u.mgd.csa.ignored_same_chan) 3118 return; 3119 link_info(link, 3120 "AP %pM tries to chanswitch to same channel, ignore\n", 3121 link->u.mgd.bssid); 3122 link->u.mgd.csa.ignored_same_chan = true; 3123 return; 3124 } 3125 3126 /* 3127 * Drop all TDLS peers on the affected link - either we disconnect or 3128 * move to a different channel from this point on. There's no telling 3129 * what our peer will do. 3130 * The TDLS WIDER_BW scenario is also problematic, as peers might now 3131 * have an incompatible wider chandef. 3132 */ 3133 ieee80211_teardown_tdls_peers(link); 3134 3135 conf = rcu_dereference_protected(link->conf->chanctx_conf, 3136 lockdep_is_held(&local->hw.wiphy->mtx)); 3137 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 3138 link_info(link, 3139 "no channel context assigned to vif?, disconnecting\n"); 3140 goto drop_connection; 3141 } 3142 3143 if (conf) 3144 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 3145 3146 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 3147 link_info(link, 3148 "driver doesn't support chan-switch with channel contexts\n"); 3149 goto drop_connection; 3150 } 3151 3152 if (drv_pre_channel_switch(sdata, &ch_switch)) { 3153 link_info(link, 3154 "preparing for channel switch failed, disconnecting\n"); 3155 goto drop_connection; 3156 } 3157 3158 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 3159 3160 link->csa.chanreq.oper = csa_ie.chanreq.oper; 3161 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 3162 &csa_ie.chanreq.ap); 3163 3164 if (chanctx) { 3165 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 3166 chanctx->mode, false); 3167 if (res) { 3168 link_info(link, 3169 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 3170 res); 3171 goto drop_connection; 3172 } 3173 } 3174 3175 link->conf->csa_active = true; 3176 link->u.mgd.csa.ignored_same_chan = false; 3177 link->u.mgd.beacon_crc_valid = false; 3178 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3179 3180 if (csa_ie.mode) 3181 ieee80211_vif_block_queues_csa(sdata); 3182 3183 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 3184 link->link_id, csa_ie.count, 3185 csa_ie.mode); 3186 3187 /* we may have to handle timeout for deactivated link in software */ 3188 now = ktime_get_boottime(); 3189 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 3190 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 3191 3192 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3193 local->ops->channel_switch) { 3194 /* 3195 * Use driver's channel switch callback, the driver will 3196 * later call ieee80211_chswitch_done(). It may deactivate 3197 * the link as well, we handle that elsewhere and queue 3198 * the csa.switch_work for the calculated time then. 3199 */ 3200 drv_channel_switch(local, sdata, &ch_switch); 3201 return; 3202 } 3203 3204 /* channel switch handled in software */ 3205 wiphy_hrtimer_work_queue(local->hw.wiphy, 3206 &link->u.mgd.csa.switch_work, 3207 link->u.mgd.csa.time - now); 3208 return; 3209 drop_connection: 3210 /* 3211 * This is just so that the disconnect flow will know that 3212 * we were trying to switch channel and failed. In case the 3213 * mode is 1 (we are not allowed to Tx), we will know not to 3214 * send a deauthentication frame. Those two fields will be 3215 * reset when the disconnection worker runs. 3216 */ 3217 link->conf->csa_active = true; 3218 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3219 3220 wiphy_work_queue(sdata->local->hw.wiphy, 3221 &ifmgd->csa_connection_drop_work); 3222 } 3223 3224 struct sta_bss_param_ch_cnt_data { 3225 struct ieee80211_sub_if_data *sdata; 3226 u8 reporting_link_id; 3227 u8 mld_id; 3228 }; 3229 3230 static enum cfg80211_rnr_iter_ret 3231 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3232 const struct ieee80211_neighbor_ap_info *info, 3233 const u8 *tbtt_info, u8 tbtt_info_len) 3234 { 3235 struct sta_bss_param_ch_cnt_data *data = _data; 3236 struct ieee80211_sub_if_data *sdata = data->sdata; 3237 const struct ieee80211_tbtt_info_ge_11 *ti; 3238 u8 bss_param_ch_cnt; 3239 int link_id; 3240 3241 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3242 return RNR_ITER_CONTINUE; 3243 3244 if (tbtt_info_len < sizeof(*ti)) 3245 return RNR_ITER_CONTINUE; 3246 3247 ti = (const void *)tbtt_info; 3248 3249 if (ti->mld_params.mld_id != data->mld_id) 3250 return RNR_ITER_CONTINUE; 3251 3252 link_id = le16_get_bits(ti->mld_params.params, 3253 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3254 bss_param_ch_cnt = 3255 le16_get_bits(ti->mld_params.params, 3256 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3257 3258 if (bss_param_ch_cnt != 255 && 3259 link_id < ARRAY_SIZE(sdata->link)) { 3260 struct ieee80211_link_data *link = 3261 sdata_dereference(sdata->link[link_id], sdata); 3262 3263 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3264 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3265 link->conf->bss_param_ch_cnt_link_id = 3266 data->reporting_link_id; 3267 } 3268 } 3269 3270 return RNR_ITER_CONTINUE; 3271 } 3272 3273 static void 3274 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3275 struct ieee80211_bss_conf *bss_conf, 3276 struct ieee802_11_elems *elems) 3277 { 3278 struct sta_bss_param_ch_cnt_data data = { 3279 .reporting_link_id = bss_conf->link_id, 3280 .sdata = sdata, 3281 }; 3282 int bss_param_ch_cnt; 3283 3284 if (!elems->ml_basic) 3285 return; 3286 3287 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3288 3289 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3290 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3291 3292 bss_param_ch_cnt = 3293 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3294 3295 /* 3296 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3297 * didn't change to indicate that we got a beacon on our own 3298 * link. 3299 */ 3300 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3301 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3302 bss_conf->bss_param_ch_cnt_link_id = 3303 bss_conf->link_id; 3304 } 3305 } 3306 3307 static bool 3308 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3309 const u8 *country_ie, u8 country_ie_len, 3310 const u8 *pwr_constr_elem, 3311 int *chan_pwr, int *pwr_reduction) 3312 { 3313 struct ieee80211_country_ie_triplet *triplet; 3314 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3315 int i, chan_increment; 3316 bool have_chan_pwr = false; 3317 3318 /* Invalid IE */ 3319 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3320 return false; 3321 3322 triplet = (void *)(country_ie + 3); 3323 country_ie_len -= 3; 3324 3325 switch (channel->band) { 3326 default: 3327 WARN_ON_ONCE(1); 3328 fallthrough; 3329 case NL80211_BAND_2GHZ: 3330 case NL80211_BAND_60GHZ: 3331 case NL80211_BAND_LC: 3332 chan_increment = 1; 3333 break; 3334 case NL80211_BAND_5GHZ: 3335 chan_increment = 4; 3336 break; 3337 case NL80211_BAND_6GHZ: 3338 /* 3339 * In the 6 GHz band, the "maximum transmit power level" 3340 * field in the triplets is reserved, and thus will be 3341 * zero and we shouldn't use it to control TX power. 3342 * The actual TX power will be given in the transmit 3343 * power envelope element instead. 3344 */ 3345 return false; 3346 } 3347 3348 /* find channel */ 3349 while (country_ie_len >= 3) { 3350 u8 first_channel = triplet->chans.first_channel; 3351 3352 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3353 goto next; 3354 3355 for (i = 0; i < triplet->chans.num_channels; i++) { 3356 if (first_channel + i * chan_increment == chan) { 3357 have_chan_pwr = true; 3358 *chan_pwr = triplet->chans.max_power; 3359 break; 3360 } 3361 } 3362 if (have_chan_pwr) 3363 break; 3364 3365 next: 3366 triplet++; 3367 country_ie_len -= 3; 3368 } 3369 3370 if (have_chan_pwr && pwr_constr_elem) 3371 *pwr_reduction = *pwr_constr_elem; 3372 else 3373 *pwr_reduction = 0; 3374 3375 return have_chan_pwr; 3376 } 3377 3378 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3379 const u8 *cisco_dtpc_ie, 3380 int *pwr_level) 3381 { 3382 /* From practical testing, the first data byte of the DTPC element 3383 * seems to contain the requested dBm level, and the CLI on Cisco 3384 * APs clearly state the range is -127 to 127 dBm, which indicates 3385 * a signed byte, although it seemingly never actually goes negative. 3386 * The other byte seems to always be zero. 3387 */ 3388 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3389 } 3390 3391 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3392 struct ieee80211_channel *channel, 3393 struct ieee80211_mgmt *mgmt, 3394 const u8 *country_ie, u8 country_ie_len, 3395 const u8 *pwr_constr_ie, 3396 const u8 *cisco_dtpc_ie) 3397 { 3398 struct ieee80211_sub_if_data *sdata = link->sdata; 3399 bool has_80211h_pwr = false, has_cisco_pwr = false; 3400 int chan_pwr = 0, pwr_reduction_80211h = 0; 3401 int pwr_level_cisco, pwr_level_80211h; 3402 int new_ap_level; 3403 __le16 capab = mgmt->u.probe_resp.capab_info; 3404 3405 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3406 return 0; /* TODO */ 3407 3408 if (country_ie && 3409 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3410 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3411 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3412 channel, country_ie, country_ie_len, 3413 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3414 pwr_level_80211h = 3415 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3416 } 3417 3418 if (cisco_dtpc_ie) { 3419 ieee80211_find_cisco_dtpc( 3420 channel, cisco_dtpc_ie, &pwr_level_cisco); 3421 has_cisco_pwr = true; 3422 } 3423 3424 if (!has_80211h_pwr && !has_cisco_pwr) 3425 return 0; 3426 3427 /* If we have both 802.11h and Cisco DTPC, apply both limits 3428 * by picking the smallest of the two power levels advertised. 3429 */ 3430 if (has_80211h_pwr && 3431 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3432 new_ap_level = pwr_level_80211h; 3433 3434 if (link->ap_power_level == new_ap_level) 3435 return 0; 3436 3437 sdata_dbg(sdata, 3438 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3439 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3440 link->u.mgd.bssid); 3441 } else { /* has_cisco_pwr is always true here. */ 3442 new_ap_level = pwr_level_cisco; 3443 3444 if (link->ap_power_level == new_ap_level) 3445 return 0; 3446 3447 sdata_dbg(sdata, 3448 "Limiting TX power to %d dBm as advertised by %pM\n", 3449 pwr_level_cisco, link->u.mgd.bssid); 3450 } 3451 3452 link->ap_power_level = new_ap_level; 3453 if (__ieee80211_recalc_txpower(link)) 3454 return BSS_CHANGED_TXPOWER; 3455 return 0; 3456 } 3457 3458 /* powersave */ 3459 static void ieee80211_enable_ps(struct ieee80211_local *local, 3460 struct ieee80211_sub_if_data *sdata) 3461 { 3462 struct ieee80211_conf *conf = &local->hw.conf; 3463 3464 /* 3465 * If we are scanning right now then the parameters will 3466 * take effect when scan finishes. 3467 */ 3468 if (local->scanning) 3469 return; 3470 3471 if (conf->dynamic_ps_timeout > 0 && 3472 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3473 mod_timer(&local->dynamic_ps_timer, jiffies + 3474 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3475 } else { 3476 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3477 ieee80211_send_nullfunc(local, sdata, true); 3478 3479 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3480 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3481 return; 3482 3483 conf->flags |= IEEE80211_CONF_PS; 3484 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3485 } 3486 } 3487 3488 static void ieee80211_change_ps(struct ieee80211_local *local) 3489 { 3490 struct ieee80211_conf *conf = &local->hw.conf; 3491 3492 if (local->ps_sdata) { 3493 ieee80211_enable_ps(local, local->ps_sdata); 3494 } else if (conf->flags & IEEE80211_CONF_PS) { 3495 conf->flags &= ~IEEE80211_CONF_PS; 3496 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3497 timer_delete_sync(&local->dynamic_ps_timer); 3498 wiphy_work_cancel(local->hw.wiphy, 3499 &local->dynamic_ps_enable_work); 3500 } 3501 } 3502 3503 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3504 { 3505 struct ieee80211_local *local = sdata->local; 3506 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3507 struct sta_info *sta = NULL; 3508 bool authorized = false; 3509 3510 if (!mgd->powersave) 3511 return false; 3512 3513 if (mgd->broken_ap) 3514 return false; 3515 3516 if (!mgd->associated) 3517 return false; 3518 3519 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3520 return false; 3521 3522 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3523 !sdata->deflink.u.mgd.have_beacon) 3524 return false; 3525 3526 rcu_read_lock(); 3527 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3528 if (sta) 3529 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3530 rcu_read_unlock(); 3531 3532 return authorized; 3533 } 3534 3535 /* need to hold RTNL or interface lock */ 3536 void ieee80211_recalc_ps(struct ieee80211_local *local) 3537 { 3538 struct ieee80211_sub_if_data *sdata, *found = NULL; 3539 int count = 0; 3540 int timeout; 3541 3542 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3543 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3544 local->ps_sdata = NULL; 3545 return; 3546 } 3547 3548 list_for_each_entry(sdata, &local->interfaces, list) { 3549 if (!ieee80211_sdata_running(sdata)) 3550 continue; 3551 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3552 /* If an AP vif is found, then disable PS 3553 * by setting the count to zero thereby setting 3554 * ps_sdata to NULL. 3555 */ 3556 count = 0; 3557 break; 3558 } 3559 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3560 continue; 3561 found = sdata; 3562 count++; 3563 } 3564 3565 if (count == 1 && ieee80211_powersave_allowed(found)) { 3566 u8 dtimper = found->deflink.u.mgd.dtim_period; 3567 3568 timeout = local->dynamic_ps_forced_timeout; 3569 if (timeout < 0) 3570 timeout = 100; 3571 local->hw.conf.dynamic_ps_timeout = timeout; 3572 3573 /* If the TIM IE is invalid, pretend the value is 1 */ 3574 if (!dtimper) 3575 dtimper = 1; 3576 3577 local->hw.conf.ps_dtim_period = dtimper; 3578 local->ps_sdata = found; 3579 } else { 3580 local->ps_sdata = NULL; 3581 } 3582 3583 ieee80211_change_ps(local); 3584 } 3585 3586 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3587 { 3588 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3589 3590 if (sdata->vif.cfg.ps != ps_allowed) { 3591 sdata->vif.cfg.ps = ps_allowed; 3592 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3593 } 3594 } 3595 3596 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3597 struct wiphy_work *work) 3598 { 3599 struct ieee80211_local *local = 3600 container_of(work, struct ieee80211_local, 3601 dynamic_ps_disable_work); 3602 3603 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3604 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3605 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3606 } 3607 3608 ieee80211_wake_queues_by_reason(&local->hw, 3609 IEEE80211_MAX_QUEUE_MAP, 3610 IEEE80211_QUEUE_STOP_REASON_PS, 3611 false); 3612 } 3613 3614 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3615 struct wiphy_work *work) 3616 { 3617 struct ieee80211_local *local = 3618 container_of(work, struct ieee80211_local, 3619 dynamic_ps_enable_work); 3620 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3621 struct ieee80211_if_managed *ifmgd; 3622 unsigned long flags; 3623 int q; 3624 3625 /* can only happen when PS was just disabled anyway */ 3626 if (!sdata) 3627 return; 3628 3629 ifmgd = &sdata->u.mgd; 3630 3631 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3632 return; 3633 3634 if (local->hw.conf.dynamic_ps_timeout > 0) { 3635 /* don't enter PS if TX frames are pending */ 3636 if (drv_tx_frames_pending(local)) { 3637 mod_timer(&local->dynamic_ps_timer, jiffies + 3638 msecs_to_jiffies( 3639 local->hw.conf.dynamic_ps_timeout)); 3640 return; 3641 } 3642 3643 /* 3644 * transmission can be stopped by others which leads to 3645 * dynamic_ps_timer expiry. Postpone the ps timer if it 3646 * is not the actual idle state. 3647 */ 3648 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3649 for (q = 0; q < local->hw.queues; q++) { 3650 if (local->queue_stop_reasons[q]) { 3651 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3652 flags); 3653 mod_timer(&local->dynamic_ps_timer, jiffies + 3654 msecs_to_jiffies( 3655 local->hw.conf.dynamic_ps_timeout)); 3656 return; 3657 } 3658 } 3659 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3660 } 3661 3662 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3663 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3664 if (drv_tx_frames_pending(local)) { 3665 mod_timer(&local->dynamic_ps_timer, jiffies + 3666 msecs_to_jiffies( 3667 local->hw.conf.dynamic_ps_timeout)); 3668 } else { 3669 ieee80211_send_nullfunc(local, sdata, true); 3670 /* Flush to get the tx status of nullfunc frame */ 3671 ieee80211_flush_queues(local, sdata, false); 3672 } 3673 } 3674 3675 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3676 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3677 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3678 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3679 local->hw.conf.flags |= IEEE80211_CONF_PS; 3680 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3681 } 3682 } 3683 3684 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3685 { 3686 struct ieee80211_local *local = timer_container_of(local, t, 3687 dynamic_ps_timer); 3688 3689 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3690 } 3691 3692 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3693 { 3694 struct ieee80211_link_data *link = 3695 container_of(work, struct ieee80211_link_data, 3696 dfs_cac_timer_work.work); 3697 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3698 struct ieee80211_sub_if_data *sdata = link->sdata; 3699 3700 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3701 3702 if (sdata->wdev.links[link->link_id].cac_started) { 3703 ieee80211_link_release_channel(link); 3704 cfg80211_cac_event(sdata->dev, &chandef, 3705 NL80211_RADAR_CAC_FINISHED, 3706 GFP_KERNEL, link->link_id); 3707 } 3708 } 3709 3710 static bool 3711 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3712 { 3713 struct ieee80211_local *local = sdata->local; 3714 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3715 bool ret = false; 3716 int ac; 3717 3718 if (local->hw.queues < IEEE80211_NUM_ACS) 3719 return false; 3720 3721 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3722 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3723 int non_acm_ac; 3724 unsigned long now = jiffies; 3725 3726 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3727 tx_tspec->admitted_time && 3728 time_after(now, tx_tspec->time_slice_start + HZ)) { 3729 tx_tspec->consumed_tx_time = 0; 3730 tx_tspec->time_slice_start = now; 3731 3732 if (tx_tspec->downgraded) 3733 tx_tspec->action = 3734 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3735 } 3736 3737 switch (tx_tspec->action) { 3738 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3739 /* take the original parameters */ 3740 if (drv_conf_tx(local, &sdata->deflink, ac, 3741 &sdata->deflink.tx_conf[ac])) 3742 link_err(&sdata->deflink, 3743 "failed to set TX queue parameters for queue %d\n", 3744 ac); 3745 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3746 tx_tspec->downgraded = false; 3747 ret = true; 3748 break; 3749 case TX_TSPEC_ACTION_DOWNGRADE: 3750 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3751 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3752 ret = true; 3753 break; 3754 } 3755 /* downgrade next lower non-ACM AC */ 3756 for (non_acm_ac = ac + 1; 3757 non_acm_ac < IEEE80211_NUM_ACS; 3758 non_acm_ac++) 3759 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3760 break; 3761 /* Usually the loop will result in using BK even if it 3762 * requires admission control, but such a configuration 3763 * makes no sense and we have to transmit somehow - the 3764 * AC selection does the same thing. 3765 * If we started out trying to downgrade from BK, then 3766 * the extra condition here might be needed. 3767 */ 3768 if (non_acm_ac >= IEEE80211_NUM_ACS) 3769 non_acm_ac = IEEE80211_AC_BK; 3770 if (drv_conf_tx(local, &sdata->deflink, ac, 3771 &sdata->deflink.tx_conf[non_acm_ac])) 3772 link_err(&sdata->deflink, 3773 "failed to set TX queue parameters for queue %d\n", 3774 ac); 3775 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3776 ret = true; 3777 wiphy_delayed_work_queue(local->hw.wiphy, 3778 &ifmgd->tx_tspec_wk, 3779 tx_tspec->time_slice_start + 3780 HZ - now + 1); 3781 break; 3782 case TX_TSPEC_ACTION_NONE: 3783 /* nothing now */ 3784 break; 3785 } 3786 } 3787 3788 return ret; 3789 } 3790 3791 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3792 { 3793 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3794 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3795 BSS_CHANGED_QOS); 3796 } 3797 3798 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3799 struct wiphy_work *work) 3800 { 3801 struct ieee80211_sub_if_data *sdata; 3802 3803 sdata = container_of(work, struct ieee80211_sub_if_data, 3804 u.mgd.tx_tspec_wk.work); 3805 ieee80211_sta_handle_tspec_ac_params(sdata); 3806 } 3807 3808 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3809 { 3810 struct ieee80211_sub_if_data *sdata = link->sdata; 3811 struct ieee80211_local *local = sdata->local; 3812 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3813 struct ieee80211_tx_queue_params *params = link->tx_conf; 3814 u8 ac; 3815 3816 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3817 mlme_dbg(sdata, 3818 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3819 ac, params[ac].acm, 3820 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3821 params[ac].txop, params[ac].uapsd, 3822 ifmgd->tx_tspec[ac].downgraded); 3823 if (!ifmgd->tx_tspec[ac].downgraded && 3824 drv_conf_tx(local, link, ac, ¶ms[ac])) 3825 link_err(link, 3826 "failed to set TX queue parameters for AC %d\n", 3827 ac); 3828 } 3829 } 3830 3831 /* MLME */ 3832 static bool 3833 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3834 struct ieee80211_link_data *link, 3835 const u8 *wmm_param, size_t wmm_param_len, 3836 const struct ieee80211_mu_edca_param_set *mu_edca) 3837 { 3838 struct ieee80211_sub_if_data *sdata = link->sdata; 3839 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3840 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3841 size_t left; 3842 int count, mu_edca_count, ac; 3843 const u8 *pos; 3844 u8 uapsd_queues = 0; 3845 3846 if (!local->ops->conf_tx) 3847 return false; 3848 3849 if (local->hw.queues < IEEE80211_NUM_ACS) 3850 return false; 3851 3852 if (!wmm_param) 3853 return false; 3854 3855 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3856 return false; 3857 3858 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3859 uapsd_queues = ifmgd->uapsd_queues; 3860 3861 count = wmm_param[6] & 0x0f; 3862 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3863 * if mu_edca was preset before and now it disappeared tell 3864 * the driver about it. 3865 */ 3866 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3867 if (count == link->u.mgd.wmm_last_param_set && 3868 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3869 return false; 3870 link->u.mgd.wmm_last_param_set = count; 3871 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3872 3873 pos = wmm_param + 8; 3874 left = wmm_param_len - 8; 3875 3876 memset(¶ms, 0, sizeof(params)); 3877 3878 sdata->wmm_acm = 0; 3879 for (; left >= 4; left -= 4, pos += 4) { 3880 int aci = (pos[0] >> 5) & 0x03; 3881 int acm = (pos[0] >> 4) & 0x01; 3882 bool uapsd = false; 3883 3884 switch (aci) { 3885 case 1: /* AC_BK */ 3886 ac = IEEE80211_AC_BK; 3887 if (acm) 3888 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3889 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3890 uapsd = true; 3891 params[ac].mu_edca = !!mu_edca; 3892 if (mu_edca) 3893 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3894 break; 3895 case 2: /* AC_VI */ 3896 ac = IEEE80211_AC_VI; 3897 if (acm) 3898 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3899 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3900 uapsd = true; 3901 params[ac].mu_edca = !!mu_edca; 3902 if (mu_edca) 3903 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3904 break; 3905 case 3: /* AC_VO */ 3906 ac = IEEE80211_AC_VO; 3907 if (acm) 3908 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3909 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3910 uapsd = true; 3911 params[ac].mu_edca = !!mu_edca; 3912 if (mu_edca) 3913 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3914 break; 3915 case 0: /* AC_BE */ 3916 default: 3917 ac = IEEE80211_AC_BE; 3918 if (acm) 3919 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3920 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3921 uapsd = true; 3922 params[ac].mu_edca = !!mu_edca; 3923 if (mu_edca) 3924 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3925 break; 3926 } 3927 3928 params[ac].aifs = pos[0] & 0x0f; 3929 3930 if (params[ac].aifs < 2) { 3931 link_info(link, 3932 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3933 params[ac].aifs, aci); 3934 params[ac].aifs = 2; 3935 } 3936 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3937 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3938 params[ac].txop = get_unaligned_le16(pos + 2); 3939 params[ac].acm = acm; 3940 params[ac].uapsd = uapsd; 3941 3942 if (params[ac].cw_min == 0 || 3943 params[ac].cw_min > params[ac].cw_max) { 3944 link_info(link, 3945 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3946 params[ac].cw_min, params[ac].cw_max, aci); 3947 return false; 3948 } 3949 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3950 } 3951 3952 /* WMM specification requires all 4 ACIs. */ 3953 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3954 if (params[ac].cw_min == 0) { 3955 link_info(link, 3956 "AP has invalid WMM params (missing AC %d), using defaults\n", 3957 ac); 3958 return false; 3959 } 3960 } 3961 3962 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3963 link->tx_conf[ac] = params[ac]; 3964 3965 return true; 3966 } 3967 3968 static bool 3969 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3970 struct ieee80211_link_data *link, 3971 const u8 *wmm_param, size_t wmm_param_len, 3972 const struct ieee80211_mu_edca_param_set *mu_edca) 3973 { 3974 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3975 mu_edca)) 3976 return false; 3977 3978 ieee80211_mgd_set_link_qos_params(link); 3979 3980 /* enable WMM or activate new settings */ 3981 link->conf->qos = true; 3982 return true; 3983 } 3984 3985 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3986 { 3987 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3988 3989 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3990 ieee80211_run_deferred_scan(sdata->local); 3991 } 3992 3993 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3994 { 3995 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3996 3997 __ieee80211_stop_poll(sdata); 3998 } 3999 4000 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 4001 u16 capab, bool erp_valid, u8 erp) 4002 { 4003 struct ieee80211_bss_conf *bss_conf = link->conf; 4004 struct ieee80211_supported_band *sband; 4005 u64 changed = 0; 4006 bool use_protection; 4007 bool use_short_preamble; 4008 bool use_short_slot; 4009 4010 sband = ieee80211_get_link_sband(link); 4011 if (!sband) 4012 return changed; 4013 4014 if (erp_valid) { 4015 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 4016 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 4017 } else { 4018 use_protection = false; 4019 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 4020 } 4021 4022 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 4023 if (sband->band == NL80211_BAND_5GHZ || 4024 sband->band == NL80211_BAND_6GHZ) 4025 use_short_slot = true; 4026 4027 if (use_protection != bss_conf->use_cts_prot) { 4028 bss_conf->use_cts_prot = use_protection; 4029 changed |= BSS_CHANGED_ERP_CTS_PROT; 4030 } 4031 4032 if (use_short_preamble != bss_conf->use_short_preamble) { 4033 bss_conf->use_short_preamble = use_short_preamble; 4034 changed |= BSS_CHANGED_ERP_PREAMBLE; 4035 } 4036 4037 if (use_short_slot != bss_conf->use_short_slot) { 4038 bss_conf->use_short_slot = use_short_slot; 4039 changed |= BSS_CHANGED_ERP_SLOT; 4040 } 4041 4042 return changed; 4043 } 4044 4045 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 4046 struct cfg80211_bss *cbss) 4047 { 4048 struct ieee80211_sub_if_data *sdata = link->sdata; 4049 struct ieee80211_bss_conf *bss_conf = link->conf; 4050 struct ieee80211_bss *bss = (void *)cbss->priv; 4051 u64 changed = BSS_CHANGED_QOS; 4052 4053 /* not really used in MLO */ 4054 sdata->u.mgd.beacon_timeout = 4055 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 4056 bss_conf->beacon_int)); 4057 4058 changed |= ieee80211_handle_bss_capability(link, 4059 bss_conf->assoc_capability, 4060 bss->has_erp_value, 4061 bss->erp_value); 4062 4063 ieee80211_check_rate_mask(link); 4064 4065 link->conf->bss = cbss; 4066 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 4067 4068 if (sdata->vif.p2p || 4069 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 4070 const struct cfg80211_bss_ies *ies; 4071 4072 rcu_read_lock(); 4073 ies = rcu_dereference(cbss->ies); 4074 if (ies) { 4075 int ret; 4076 4077 ret = cfg80211_get_p2p_attr( 4078 ies->data, ies->len, 4079 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4080 (u8 *) &bss_conf->p2p_noa_attr, 4081 sizeof(bss_conf->p2p_noa_attr)); 4082 if (ret >= 2) { 4083 link->u.mgd.p2p_noa_index = 4084 bss_conf->p2p_noa_attr.index; 4085 changed |= BSS_CHANGED_P2P_PS; 4086 } 4087 } 4088 rcu_read_unlock(); 4089 } 4090 4091 if (link->u.mgd.have_beacon) { 4092 bss_conf->beacon_rate = bss->beacon_rate; 4093 changed |= BSS_CHANGED_BEACON_INFO; 4094 } else { 4095 bss_conf->beacon_rate = NULL; 4096 } 4097 4098 /* Tell the driver to monitor connection quality (if supported) */ 4099 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 4100 bss_conf->cqm_rssi_thold) 4101 changed |= BSS_CHANGED_CQM; 4102 4103 return changed; 4104 } 4105 4106 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 4107 struct ieee80211_mgd_assoc_data *assoc_data, 4108 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 4109 { 4110 struct ieee80211_local *local = sdata->local; 4111 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 4112 u64 vif_changed = BSS_CHANGED_ASSOC; 4113 unsigned int link_id; 4114 4115 lockdep_assert_wiphy(local->hw.wiphy); 4116 4117 sdata->u.mgd.associated = true; 4118 4119 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4120 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4121 struct ieee80211_link_data *link; 4122 4123 if (!cbss || 4124 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4125 continue; 4126 4127 if (ieee80211_vif_is_mld(&sdata->vif) && 4128 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 4129 continue; 4130 4131 link = sdata_dereference(sdata->link[link_id], sdata); 4132 if (WARN_ON(!link)) 4133 return; 4134 4135 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 4136 } 4137 4138 /* just to be sure */ 4139 ieee80211_stop_poll(sdata); 4140 4141 ieee80211_led_assoc(local, 1); 4142 4143 vif_cfg->assoc = 1; 4144 4145 /* Enable ARP filtering */ 4146 if (vif_cfg->arp_addr_cnt) 4147 vif_changed |= BSS_CHANGED_ARP_FILTER; 4148 4149 if (ieee80211_vif_is_mld(&sdata->vif)) { 4150 for (link_id = 0; 4151 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4152 link_id++) { 4153 struct ieee80211_link_data *link; 4154 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4155 4156 if (!cbss || 4157 !(BIT(link_id) & 4158 ieee80211_vif_usable_links(&sdata->vif)) || 4159 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4160 continue; 4161 4162 link = sdata_dereference(sdata->link[link_id], sdata); 4163 if (WARN_ON(!link)) 4164 return; 4165 4166 ieee80211_link_info_change_notify(sdata, link, 4167 changed[link_id]); 4168 4169 ieee80211_recalc_smps(sdata, link); 4170 } 4171 4172 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 4173 } else { 4174 ieee80211_bss_info_change_notify(sdata, 4175 vif_changed | changed[0]); 4176 } 4177 4178 ieee80211_recalc_ps(local); 4179 4180 /* leave this here to not change ordering in non-MLO cases */ 4181 if (!ieee80211_vif_is_mld(&sdata->vif)) 4182 ieee80211_recalc_smps(sdata, &sdata->deflink); 4183 ieee80211_recalc_ps_vif(sdata); 4184 4185 netif_carrier_on(sdata->dev); 4186 } 4187 4188 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 4189 { 4190 struct ieee80211_mgd_assoc_data *add_links_data = 4191 sdata->u.mgd.reconf.add_links_data; 4192 4193 if (!ieee80211_vif_is_mld(&sdata->vif) || 4194 !(sdata->u.mgd.reconf.added_links | 4195 sdata->u.mgd.reconf.removed_links)) 4196 return; 4197 4198 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4199 &sdata->u.mgd.reconf.wk); 4200 sdata->u.mgd.reconf.added_links = 0; 4201 sdata->u.mgd.reconf.removed_links = 0; 4202 sdata->u.mgd.reconf.dialog_token = 0; 4203 4204 if (add_links_data) { 4205 struct cfg80211_mlo_reconf_done_data done_data = {}; 4206 u8 link_id; 4207 4208 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4209 link_id++) 4210 done_data.links[link_id].bss = 4211 add_links_data->link[link_id].bss; 4212 4213 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4214 4215 kfree(sdata->u.mgd.reconf.add_links_data); 4216 sdata->u.mgd.reconf.add_links_data = NULL; 4217 } 4218 } 4219 4220 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4221 u16 stype, u16 reason, bool tx, 4222 u8 *frame_buf) 4223 { 4224 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4225 struct ieee80211_local *local = sdata->local; 4226 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4227 unsigned int link_id; 4228 u64 changed = 0; 4229 struct ieee80211_prep_tx_info info = { 4230 .subtype = stype, 4231 .was_assoc = true, 4232 .link_id = ffs(sdata->vif.active_links) - 1, 4233 }; 4234 4235 lockdep_assert_wiphy(local->hw.wiphy); 4236 4237 if (frame_buf) 4238 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4239 4240 if (WARN_ON(!ap_sta)) 4241 return; 4242 4243 if (WARN_ON_ONCE(tx && !frame_buf)) 4244 return; 4245 4246 if (WARN_ON(!ifmgd->associated)) 4247 return; 4248 4249 ieee80211_stop_poll(sdata); 4250 4251 ifmgd->associated = false; 4252 4253 if (tx) { 4254 bool tx_link_found = false; 4255 4256 for (link_id = 0; 4257 link_id < ARRAY_SIZE(sdata->link); 4258 link_id++) { 4259 struct ieee80211_link_data *link; 4260 4261 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4262 continue; 4263 4264 link = sdata_dereference(sdata->link[link_id], sdata); 4265 if (WARN_ON_ONCE(!link)) 4266 continue; 4267 4268 if (link->u.mgd.csa.blocked_tx) 4269 continue; 4270 4271 tx_link_found = true; 4272 break; 4273 } 4274 4275 tx = tx_link_found; 4276 } 4277 4278 /* other links will be destroyed */ 4279 sdata->deflink.conf->bss = NULL; 4280 sdata->deflink.conf->epcs_support = false; 4281 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4282 4283 netif_carrier_off(sdata->dev); 4284 4285 /* 4286 * if we want to get out of ps before disassoc (why?) we have 4287 * to do it before sending disassoc, as otherwise the null-packet 4288 * won't be valid. 4289 */ 4290 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4291 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4292 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4293 } 4294 local->ps_sdata = NULL; 4295 4296 /* disable per-vif ps */ 4297 ieee80211_recalc_ps_vif(sdata); 4298 4299 /* make sure ongoing transmission finishes */ 4300 synchronize_net(); 4301 4302 /* 4303 * drop any frame before deauth/disassoc, this can be data or 4304 * management frame. Since we are disconnecting, we should not 4305 * insist sending these frames which can take time and delay 4306 * the disconnection and possible the roaming. 4307 */ 4308 ieee80211_flush_queues(local, sdata, true); 4309 4310 if (tx) { 4311 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4312 4313 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4314 sdata->vif.cfg.ap_addr, stype, 4315 reason, true, frame_buf); 4316 4317 /* flush out frame - make sure the deauth was actually sent */ 4318 ieee80211_flush_queues(local, sdata, false); 4319 4320 drv_mgd_complete_tx(sdata->local, sdata, &info); 4321 } else if (frame_buf) { 4322 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4323 sdata->vif.cfg.ap_addr, stype, 4324 reason, false, frame_buf); 4325 } 4326 4327 /* clear AP addr only after building the needed mgmt frames */ 4328 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4329 eth_zero_addr(sdata->vif.cfg.ap_addr); 4330 4331 sdata->vif.cfg.ssid_len = 0; 4332 4333 /* Remove TDLS peers */ 4334 __sta_info_flush(sdata, false, -1, ap_sta); 4335 4336 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4337 /* Only move the AP state */ 4338 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4339 } else { 4340 /* Remove AP peer */ 4341 sta_info_flush(sdata, -1); 4342 } 4343 4344 /* finally reset all BSS / config parameters */ 4345 if (!ieee80211_vif_is_mld(&sdata->vif)) 4346 changed |= ieee80211_reset_erp_info(sdata); 4347 4348 ieee80211_led_assoc(local, 0); 4349 changed |= BSS_CHANGED_ASSOC; 4350 sdata->vif.cfg.assoc = false; 4351 4352 sdata->deflink.u.mgd.p2p_noa_index = -1; 4353 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4354 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4355 4356 /* on the next assoc, re-program HT/VHT parameters */ 4357 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4358 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4359 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4360 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4361 4362 /* 4363 * reset MU-MIMO ownership and group data in default link, 4364 * if used, other links are destroyed 4365 */ 4366 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4367 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4368 memset(sdata->vif.bss_conf.mu_group.position, 0, 4369 sizeof(sdata->vif.bss_conf.mu_group.position)); 4370 if (!ieee80211_vif_is_mld(&sdata->vif)) 4371 changed |= BSS_CHANGED_MU_GROUPS; 4372 sdata->vif.bss_conf.mu_mimo_owner = false; 4373 4374 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4375 4376 timer_delete_sync(&local->dynamic_ps_timer); 4377 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4378 4379 /* Disable ARP filtering */ 4380 if (sdata->vif.cfg.arp_addr_cnt) 4381 changed |= BSS_CHANGED_ARP_FILTER; 4382 4383 sdata->vif.bss_conf.qos = false; 4384 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4385 changed |= BSS_CHANGED_QOS; 4386 /* The BSSID (not really interesting) and HT changed */ 4387 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4388 ieee80211_bss_info_change_notify(sdata, changed); 4389 } else { 4390 ieee80211_vif_cfg_change_notify(sdata, changed); 4391 } 4392 4393 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4394 /* 4395 * After notifying the driver about the disassoc, 4396 * remove the ap sta. 4397 */ 4398 sta_info_flush(sdata, -1); 4399 } 4400 4401 /* disassociated - set to defaults now */ 4402 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4403 4404 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4405 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4406 timer_delete_sync(&sdata->u.mgd.timer); 4407 4408 sdata->vif.bss_conf.dtim_period = 0; 4409 sdata->vif.bss_conf.beacon_rate = NULL; 4410 4411 sdata->deflink.u.mgd.have_beacon = false; 4412 sdata->deflink.u.mgd.tracking_signal_avg = false; 4413 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4414 4415 ifmgd->flags = 0; 4416 4417 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4418 struct ieee80211_link_data *link; 4419 4420 link = sdata_dereference(sdata->link[link_id], sdata); 4421 if (!link) 4422 continue; 4423 ieee80211_link_release_channel(link); 4424 } 4425 4426 sdata->vif.bss_conf.csa_active = false; 4427 sdata->deflink.u.mgd.csa.blocked_tx = false; 4428 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4429 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4430 ieee80211_vif_unblock_queues_csa(sdata); 4431 4432 /* existing TX TSPEC sessions no longer exist */ 4433 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4434 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4435 4436 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4437 sdata->vif.bss_conf.pwr_reduction = 0; 4438 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4439 4440 sdata->vif.cfg.eml_cap = 0; 4441 sdata->vif.cfg.eml_med_sync_delay = 0; 4442 sdata->vif.cfg.mld_capa_op = 0; 4443 4444 memset(&sdata->u.mgd.ttlm_info, 0, 4445 sizeof(sdata->u.mgd.ttlm_info)); 4446 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4447 4448 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4449 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4450 &ifmgd->neg_ttlm_timeout_work); 4451 4452 sdata->u.mgd.removed_links = 0; 4453 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 4454 &sdata->u.mgd.ml_reconf_work); 4455 4456 wiphy_work_cancel(sdata->local->hw.wiphy, 4457 &ifmgd->teardown_ttlm_work); 4458 4459 /* if disconnection happens in the middle of the ML reconfiguration 4460 * flow, cfg80211 must called to release the BSS references obtained 4461 * when the flow started. 4462 */ 4463 ieee80211_ml_reconf_reset(sdata); 4464 4465 ieee80211_vif_set_links(sdata, 0, 0); 4466 4467 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4468 4469 ifmgd->epcs.enabled = false; 4470 ifmgd->epcs.dialog_token = 0; 4471 4472 memset(ifmgd->userspace_selectors, 0, 4473 sizeof(ifmgd->userspace_selectors)); 4474 } 4475 4476 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4477 { 4478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4479 struct ieee80211_local *local = sdata->local; 4480 4481 lockdep_assert_wiphy(local->hw.wiphy); 4482 4483 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4484 return; 4485 4486 __ieee80211_stop_poll(sdata); 4487 4488 ieee80211_recalc_ps(local); 4489 4490 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4491 return; 4492 4493 /* 4494 * We've received a probe response, but are not sure whether 4495 * we have or will be receiving any beacons or data, so let's 4496 * schedule the timers again, just in case. 4497 */ 4498 ieee80211_sta_reset_beacon_monitor(sdata); 4499 4500 mod_timer(&ifmgd->conn_mon_timer, 4501 round_jiffies_up(jiffies + 4502 IEEE80211_CONNECTION_IDLE_TIME)); 4503 } 4504 4505 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4506 struct ieee80211_hdr *hdr, 4507 u16 tx_time) 4508 { 4509 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4510 u16 tid; 4511 int ac; 4512 struct ieee80211_sta_tx_tspec *tx_tspec; 4513 unsigned long now = jiffies; 4514 4515 if (!ieee80211_is_data_qos(hdr->frame_control)) 4516 return; 4517 4518 tid = ieee80211_get_tid(hdr); 4519 ac = ieee80211_ac_from_tid(tid); 4520 tx_tspec = &ifmgd->tx_tspec[ac]; 4521 4522 if (likely(!tx_tspec->admitted_time)) 4523 return; 4524 4525 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4526 tx_tspec->consumed_tx_time = 0; 4527 tx_tspec->time_slice_start = now; 4528 4529 if (tx_tspec->downgraded) { 4530 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4531 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4532 &ifmgd->tx_tspec_wk, 0); 4533 } 4534 } 4535 4536 if (tx_tspec->downgraded) 4537 return; 4538 4539 tx_tspec->consumed_tx_time += tx_time; 4540 4541 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4542 tx_tspec->downgraded = true; 4543 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4544 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4545 &ifmgd->tx_tspec_wk, 0); 4546 } 4547 } 4548 4549 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4550 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4551 { 4552 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4553 4554 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4555 !sdata->u.mgd.probe_send_count) 4556 return; 4557 4558 if (ack) 4559 sdata->u.mgd.probe_send_count = 0; 4560 else 4561 sdata->u.mgd.nullfunc_failed = true; 4562 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4563 } 4564 4565 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4566 const u8 *src, const u8 *dst, 4567 const u8 *ssid, size_t ssid_len, 4568 struct ieee80211_channel *channel) 4569 { 4570 struct sk_buff *skb; 4571 4572 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4573 ssid, ssid_len, NULL, 0, 4574 IEEE80211_PROBE_FLAG_DIRECTED); 4575 if (skb) 4576 ieee80211_tx_skb(sdata, skb); 4577 } 4578 4579 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4580 { 4581 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4582 u8 *dst = sdata->vif.cfg.ap_addr; 4583 u8 unicast_limit = max(1, max_probe_tries - 3); 4584 struct sta_info *sta; 4585 4586 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4587 4588 /* 4589 * Try sending broadcast probe requests for the last three 4590 * probe requests after the first ones failed since some 4591 * buggy APs only support broadcast probe requests. 4592 */ 4593 if (ifmgd->probe_send_count >= unicast_limit) 4594 dst = NULL; 4595 4596 /* 4597 * When the hardware reports an accurate Tx ACK status, it's 4598 * better to send a nullfunc frame instead of a probe request, 4599 * as it will kick us off the AP quickly if we aren't associated 4600 * anymore. The timeout will be reset if the frame is ACKed by 4601 * the AP. 4602 */ 4603 ifmgd->probe_send_count++; 4604 4605 if (dst) { 4606 sta = sta_info_get(sdata, dst); 4607 if (!WARN_ON(!sta)) 4608 ieee80211_check_fast_rx(sta); 4609 } 4610 4611 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4612 ifmgd->nullfunc_failed = false; 4613 ieee80211_send_nullfunc(sdata->local, sdata, false); 4614 } else { 4615 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4616 sdata->vif.cfg.ssid, 4617 sdata->vif.cfg.ssid_len, 4618 sdata->deflink.conf->bss->channel); 4619 } 4620 4621 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4622 run_again(sdata, ifmgd->probe_timeout); 4623 } 4624 4625 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4626 bool beacon) 4627 { 4628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4629 bool already = false; 4630 4631 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4632 4633 if (!ieee80211_sdata_running(sdata)) 4634 return; 4635 4636 if (!ifmgd->associated) 4637 return; 4638 4639 if (sdata->local->tmp_channel || sdata->local->scanning) 4640 return; 4641 4642 if (sdata->local->suspending) { 4643 /* reschedule after resume */ 4644 ieee80211_reset_ap_probe(sdata); 4645 return; 4646 } 4647 4648 if (beacon) { 4649 mlme_dbg_ratelimited(sdata, 4650 "detected beacon loss from AP (missed %d beacons) - probing\n", 4651 beacon_loss_count); 4652 4653 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4654 } 4655 4656 /* 4657 * The driver/our work has already reported this event or the 4658 * connection monitoring has kicked in and we have already sent 4659 * a probe request. Or maybe the AP died and the driver keeps 4660 * reporting until we disassociate... 4661 * 4662 * In either case we have to ignore the current call to this 4663 * function (except for setting the correct probe reason bit) 4664 * because otherwise we would reset the timer every time and 4665 * never check whether we received a probe response! 4666 */ 4667 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4668 already = true; 4669 4670 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4671 4672 if (already) 4673 return; 4674 4675 ieee80211_recalc_ps(sdata->local); 4676 4677 ifmgd->probe_send_count = 0; 4678 ieee80211_mgd_probe_ap_send(sdata); 4679 } 4680 4681 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4682 struct ieee80211_vif *vif) 4683 { 4684 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4685 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4686 struct cfg80211_bss *cbss; 4687 struct sk_buff *skb; 4688 const struct element *ssid; 4689 int ssid_len; 4690 4691 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4692 4693 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4694 ieee80211_vif_is_mld(&sdata->vif))) 4695 return NULL; 4696 4697 if (ifmgd->associated) 4698 cbss = sdata->deflink.conf->bss; 4699 else if (ifmgd->auth_data) 4700 cbss = ifmgd->auth_data->bss; 4701 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4702 cbss = ifmgd->assoc_data->link[0].bss; 4703 else 4704 return NULL; 4705 4706 rcu_read_lock(); 4707 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4708 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4709 "invalid SSID element (len=%d)", 4710 ssid ? ssid->datalen : -1)) 4711 ssid_len = 0; 4712 else 4713 ssid_len = ssid->datalen; 4714 4715 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4716 (u32) -1, cbss->channel, 4717 ssid->data, ssid_len, 4718 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4719 rcu_read_unlock(); 4720 4721 return skb; 4722 } 4723 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4724 4725 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4726 const u8 *buf, size_t len, bool tx, 4727 u16 reason, bool reconnect) 4728 { 4729 struct ieee80211_event event = { 4730 .type = MLME_EVENT, 4731 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4732 .u.mlme.reason = reason, 4733 }; 4734 4735 if (tx) 4736 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4737 else 4738 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4739 4740 drv_event_callback(sdata->local, sdata, &event); 4741 } 4742 4743 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4744 { 4745 struct ieee80211_local *local = sdata->local; 4746 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4747 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4748 4749 lockdep_assert_wiphy(local->hw.wiphy); 4750 4751 if (!ifmgd->associated) 4752 return; 4753 4754 if (!ifmgd->driver_disconnect) { 4755 unsigned int link_id; 4756 4757 /* 4758 * AP is probably out of range (or not reachable for another 4759 * reason) so remove the bss structs for that AP. In the case 4760 * of multi-link, it's not clear that all of them really are 4761 * out of range, but if they weren't the driver likely would 4762 * have switched to just have a single link active? 4763 */ 4764 for (link_id = 0; 4765 link_id < ARRAY_SIZE(sdata->link); 4766 link_id++) { 4767 struct ieee80211_link_data *link; 4768 4769 link = sdata_dereference(sdata->link[link_id], sdata); 4770 if (!link || !link->conf->bss) 4771 continue; 4772 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4773 link->conf->bss = NULL; 4774 } 4775 } 4776 4777 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4778 ifmgd->driver_disconnect ? 4779 WLAN_REASON_DEAUTH_LEAVING : 4780 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4781 true, frame_buf); 4782 /* the other links will be destroyed */ 4783 sdata->vif.bss_conf.csa_active = false; 4784 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4785 sdata->deflink.u.mgd.csa.blocked_tx = false; 4786 ieee80211_vif_unblock_queues_csa(sdata); 4787 4788 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4789 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4790 ifmgd->reconnect); 4791 ifmgd->reconnect = false; 4792 } 4793 4794 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4795 struct wiphy_work *work) 4796 { 4797 struct ieee80211_sub_if_data *sdata = 4798 container_of(work, struct ieee80211_sub_if_data, 4799 u.mgd.beacon_connection_loss_work); 4800 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4801 4802 if (ifmgd->connection_loss) { 4803 sdata_info(sdata, "Connection to AP %pM lost\n", 4804 sdata->vif.cfg.ap_addr); 4805 __ieee80211_disconnect(sdata); 4806 ifmgd->connection_loss = false; 4807 } else if (ifmgd->driver_disconnect) { 4808 sdata_info(sdata, 4809 "Driver requested disconnection from AP %pM\n", 4810 sdata->vif.cfg.ap_addr); 4811 __ieee80211_disconnect(sdata); 4812 ifmgd->driver_disconnect = false; 4813 } else { 4814 if (ifmgd->associated) 4815 sdata->deflink.u.mgd.beacon_loss_count++; 4816 ieee80211_mgd_probe_ap(sdata, true); 4817 } 4818 } 4819 4820 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4821 struct wiphy_work *work) 4822 { 4823 struct ieee80211_sub_if_data *sdata = 4824 container_of(work, struct ieee80211_sub_if_data, 4825 u.mgd.csa_connection_drop_work); 4826 4827 __ieee80211_disconnect(sdata); 4828 } 4829 4830 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4831 { 4832 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4833 struct ieee80211_hw *hw = &sdata->local->hw; 4834 4835 trace_api_beacon_loss(sdata); 4836 4837 sdata->u.mgd.connection_loss = false; 4838 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4839 } 4840 EXPORT_SYMBOL(ieee80211_beacon_loss); 4841 4842 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4843 { 4844 struct ieee80211_sub_if_data *sdata; 4845 struct ieee80211_hw *hw; 4846 4847 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4848 4849 sdata = vif_to_sdata(vif); 4850 hw = &sdata->local->hw; 4851 4852 trace_api_connection_loss(sdata); 4853 4854 sdata->u.mgd.connection_loss = true; 4855 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4856 } 4857 EXPORT_SYMBOL(ieee80211_connection_loss); 4858 4859 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4860 { 4861 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4862 struct ieee80211_hw *hw = &sdata->local->hw; 4863 4864 trace_api_disconnect(sdata, reconnect); 4865 4866 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4867 return; 4868 4869 sdata->u.mgd.driver_disconnect = true; 4870 sdata->u.mgd.reconnect = reconnect; 4871 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4872 } 4873 EXPORT_SYMBOL(ieee80211_disconnect); 4874 4875 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4876 bool assoc) 4877 { 4878 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4879 4880 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4881 4882 sdata->u.mgd.auth_data = NULL; 4883 4884 if (!assoc) { 4885 /* 4886 * we are not authenticated yet, the only timer that could be 4887 * running is the timeout for the authentication response which 4888 * which is not relevant anymore. 4889 */ 4890 timer_delete_sync(&sdata->u.mgd.timer); 4891 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4892 4893 /* other links are destroyed */ 4894 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4895 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4896 BSS_CHANGED_BSSID); 4897 sdata->u.mgd.flags = 0; 4898 4899 ieee80211_link_release_channel(&sdata->deflink); 4900 ieee80211_vif_set_links(sdata, 0, 0); 4901 } 4902 4903 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4904 kfree(auth_data); 4905 } 4906 4907 enum assoc_status { 4908 ASSOC_SUCCESS, 4909 ASSOC_REJECTED, 4910 ASSOC_TIMEOUT, 4911 ASSOC_ABANDON, 4912 }; 4913 4914 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4915 enum assoc_status status) 4916 { 4917 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4918 4919 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4920 4921 sdata->u.mgd.assoc_data = NULL; 4922 4923 if (status != ASSOC_SUCCESS) { 4924 /* 4925 * we are not associated yet, the only timer that could be 4926 * running is the timeout for the association response which 4927 * which is not relevant anymore. 4928 */ 4929 timer_delete_sync(&sdata->u.mgd.timer); 4930 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4931 4932 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4933 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4934 BSS_CHANGED_BSSID); 4935 sdata->u.mgd.flags = 0; 4936 sdata->vif.bss_conf.mu_mimo_owner = false; 4937 4938 if (status != ASSOC_REJECTED) { 4939 struct cfg80211_assoc_failure data = { 4940 .timeout = status == ASSOC_TIMEOUT, 4941 }; 4942 int i; 4943 4944 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4945 ARRAY_SIZE(assoc_data->link)); 4946 4947 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4948 data.bss[i] = assoc_data->link[i].bss; 4949 4950 if (ieee80211_vif_is_mld(&sdata->vif)) 4951 data.ap_mld_addr = assoc_data->ap_addr; 4952 4953 cfg80211_assoc_failure(sdata->dev, &data); 4954 } 4955 4956 ieee80211_link_release_channel(&sdata->deflink); 4957 ieee80211_vif_set_links(sdata, 0, 0); 4958 } 4959 4960 kfree(assoc_data); 4961 } 4962 4963 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4964 struct ieee80211_mgmt *mgmt, size_t len) 4965 { 4966 struct ieee80211_local *local = sdata->local; 4967 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4968 const struct element *challenge; 4969 u8 *pos; 4970 u32 tx_flags = 0; 4971 struct ieee80211_prep_tx_info info = { 4972 .subtype = IEEE80211_STYPE_AUTH, 4973 .link_id = auth_data->link_id, 4974 }; 4975 4976 pos = mgmt->u.auth.variable; 4977 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4978 len - (pos - (u8 *)mgmt)); 4979 if (!challenge) 4980 return; 4981 auth_data->expected_transaction = 4; 4982 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4983 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4984 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4985 IEEE80211_TX_INTFL_MLME_CONN_TX; 4986 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4987 (void *)challenge, 4988 challenge->datalen + sizeof(*challenge), 4989 auth_data->ap_addr, auth_data->ap_addr, 4990 auth_data->key, auth_data->key_len, 4991 auth_data->key_idx, tx_flags); 4992 } 4993 4994 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4995 { 4996 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4997 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4998 struct sta_info *sta; 4999 5000 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5001 5002 sdata_info(sdata, "authenticated\n"); 5003 ifmgd->auth_data->done = true; 5004 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 5005 ifmgd->auth_data->timeout_started = true; 5006 run_again(sdata, ifmgd->auth_data->timeout); 5007 5008 /* move station state to auth */ 5009 sta = sta_info_get(sdata, ap_addr); 5010 if (!sta) { 5011 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 5012 return false; 5013 } 5014 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 5015 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 5016 return false; 5017 } 5018 5019 return true; 5020 } 5021 5022 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 5023 struct ieee80211_mgmt *mgmt, size_t len) 5024 { 5025 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5026 u16 auth_alg, auth_transaction, status_code, encap_len; 5027 struct ieee80211_event event = { 5028 .type = MLME_EVENT, 5029 .u.mlme.data = AUTH_EVENT, 5030 }; 5031 struct ieee80211_prep_tx_info info = { 5032 .subtype = IEEE80211_STYPE_AUTH, 5033 }; 5034 bool sae_need_confirm = false; 5035 bool auth_fail = false; 5036 5037 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5038 5039 if (len < 24 + 6) 5040 return; 5041 5042 if (!ifmgd->auth_data || ifmgd->auth_data->done) 5043 return; 5044 5045 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 5046 return; 5047 5048 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 5049 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 5050 status_code = le16_to_cpu(mgmt->u.auth.status_code); 5051 5052 /* 5053 * IEEE 802.1X Authentication: 5054 * Header + Authentication Algorithm Number(2 byte) + Authentication 5055 * Transaction Sequence Number(2 byte) + Status Code(2 byte) + 5056 * Encapsulation Length(2 byte). 5057 */ 5058 if (auth_alg == WLAN_AUTH_IEEE8021X && len < 24 + 8) 5059 return; 5060 5061 info.link_id = ifmgd->auth_data->link_id; 5062 5063 if (auth_alg != ifmgd->auth_data->algorithm || 5064 (auth_alg != WLAN_AUTH_SAE && 5065 auth_transaction != ifmgd->auth_data->expected_transaction) || 5066 (auth_alg == WLAN_AUTH_SAE && 5067 (auth_transaction < ifmgd->auth_data->expected_transaction || 5068 auth_transaction > 2))) { 5069 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 5070 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 5071 auth_transaction, 5072 ifmgd->auth_data->expected_transaction); 5073 goto notify_driver; 5074 } 5075 5076 switch (auth_alg) { 5077 case WLAN_AUTH_IEEE8021X: 5078 if (status_code != WLAN_STATUS_SUCCESS && 5079 status_code != WLAN_STATUS_8021X_AUTH_SUCCESS) 5080 auth_fail = true; 5081 5082 if (!auth_fail) { 5083 /* Indicates length of encapsulated EAPOL PDU */ 5084 encap_len = get_unaligned_le16(mgmt->u.auth.variable); 5085 } 5086 break; 5087 default: 5088 if (status_code != WLAN_STATUS_SUCCESS) 5089 auth_fail = true; 5090 break; 5091 } 5092 5093 if (auth_fail) { 5094 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5095 5096 if (auth_alg == WLAN_AUTH_SAE && 5097 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 5098 (auth_transaction == 1 && 5099 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 5100 status_code == WLAN_STATUS_SAE_PK)))) { 5101 /* waiting for userspace now */ 5102 ifmgd->auth_data->waiting = true; 5103 ifmgd->auth_data->timeout = 5104 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 5105 ifmgd->auth_data->timeout_started = true; 5106 run_again(sdata, ifmgd->auth_data->timeout); 5107 if (auth_transaction == 1) 5108 sae_need_confirm = true; 5109 goto notify_driver; 5110 } 5111 5112 sdata_info(sdata, "%pM denied authentication (status %d)\n", 5113 mgmt->sa, status_code); 5114 ieee80211_destroy_auth_data(sdata, false); 5115 event.u.mlme.status = MLME_DENIED; 5116 event.u.mlme.reason = status_code; 5117 drv_event_callback(sdata->local, sdata, &event); 5118 goto notify_driver; 5119 } 5120 5121 switch (ifmgd->auth_data->algorithm) { 5122 case WLAN_AUTH_OPEN: 5123 case WLAN_AUTH_LEAP: 5124 case WLAN_AUTH_FT: 5125 case WLAN_AUTH_SAE: 5126 case WLAN_AUTH_FILS_SK: 5127 case WLAN_AUTH_FILS_SK_PFS: 5128 case WLAN_AUTH_FILS_PK: 5129 case WLAN_AUTH_EPPKE: 5130 case WLAN_AUTH_IEEE8021X: 5131 break; 5132 case WLAN_AUTH_SHARED_KEY: 5133 if (ifmgd->auth_data->expected_transaction != 4) { 5134 ieee80211_auth_challenge(sdata, mgmt, len); 5135 /* need another frame */ 5136 return; 5137 } 5138 break; 5139 default: 5140 WARN_ONCE(1, "invalid auth alg %d", 5141 ifmgd->auth_data->algorithm); 5142 goto notify_driver; 5143 } 5144 5145 event.u.mlme.status = MLME_SUCCESS; 5146 info.success = 1; 5147 drv_event_callback(sdata->local, sdata, &event); 5148 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 5149 (auth_transaction == 2 && 5150 ifmgd->auth_data->expected_transaction == 2)) { 5151 switch (ifmgd->auth_data->algorithm) { 5152 case WLAN_AUTH_IEEE8021X: 5153 /* 5154 * IEEE 802.1X authentication: 5155 * - When the full EAP handshake completes over the 5156 * Authentication process, the responder sets the 5157 * Status Code to WLAN_STATUS_8021X_AUTH_SUCCESS as 5158 * specified in "IEEE P802.11bi/D4.0, 12.16.5". 5159 * 5160 * - In the PMKSA caching case, only two Authentication 5161 * frames are exchanged if the responder (e.g., AP) 5162 * identifies a valid PMKSA, then as specified in 5163 * "IEEE P802.11bi/D4.0, 12.16.8.3", the responder 5164 * shall set the Status Code to SUCCESS in the final 5165 * Authentication frame and must not include an 5166 * encapsulated EAPOL PDU. 5167 * 5168 * Both conditions are treated as successful 5169 * authentication, so mark the state to Authenticated. 5170 */ 5171 if (status_code != WLAN_STATUS_8021X_AUTH_SUCCESS && 5172 !(status_code == WLAN_STATUS_SUCCESS && 5173 encap_len == 0)) 5174 break; 5175 fallthrough; 5176 default: 5177 if (!ieee80211_mark_sta_auth(sdata)) 5178 return; /* ignore frame -- wait for timeout */ 5179 5180 break; 5181 } 5182 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5183 auth_transaction == 1) { 5184 sae_need_confirm = true; 5185 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5186 auth_transaction == 2) { 5187 sdata_info(sdata, "SAE peer confirmed\n"); 5188 ifmgd->auth_data->peer_confirmed = true; 5189 } 5190 5191 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5192 notify_driver: 5193 if (!sae_need_confirm) 5194 drv_mgd_complete_tx(sdata->local, sdata, &info); 5195 } 5196 5197 #define case_WLAN(type) \ 5198 case WLAN_REASON_##type: return #type 5199 5200 const char *ieee80211_get_reason_code_string(u16 reason_code) 5201 { 5202 switch (reason_code) { 5203 case_WLAN(UNSPECIFIED); 5204 case_WLAN(PREV_AUTH_NOT_VALID); 5205 case_WLAN(DEAUTH_LEAVING); 5206 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 5207 case_WLAN(DISASSOC_AP_BUSY); 5208 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 5209 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 5210 case_WLAN(DISASSOC_STA_HAS_LEFT); 5211 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 5212 case_WLAN(DISASSOC_BAD_POWER); 5213 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 5214 case_WLAN(INVALID_IE); 5215 case_WLAN(MIC_FAILURE); 5216 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 5217 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 5218 case_WLAN(IE_DIFFERENT); 5219 case_WLAN(INVALID_GROUP_CIPHER); 5220 case_WLAN(INVALID_PAIRWISE_CIPHER); 5221 case_WLAN(INVALID_AKMP); 5222 case_WLAN(UNSUPP_RSN_VERSION); 5223 case_WLAN(INVALID_RSN_IE_CAP); 5224 case_WLAN(IEEE8021X_FAILED); 5225 case_WLAN(CIPHER_SUITE_REJECTED); 5226 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 5227 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 5228 case_WLAN(DISASSOC_LOW_ACK); 5229 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 5230 case_WLAN(QSTA_LEAVE_QBSS); 5231 case_WLAN(QSTA_NOT_USE); 5232 case_WLAN(QSTA_REQUIRE_SETUP); 5233 case_WLAN(QSTA_TIMEOUT); 5234 case_WLAN(QSTA_CIPHER_NOT_SUPP); 5235 case_WLAN(MESH_PEER_CANCELED); 5236 case_WLAN(MESH_MAX_PEERS); 5237 case_WLAN(MESH_CONFIG); 5238 case_WLAN(MESH_CLOSE); 5239 case_WLAN(MESH_MAX_RETRIES); 5240 case_WLAN(MESH_CONFIRM_TIMEOUT); 5241 case_WLAN(MESH_INVALID_GTK); 5242 case_WLAN(MESH_INCONSISTENT_PARAM); 5243 case_WLAN(MESH_INVALID_SECURITY); 5244 case_WLAN(MESH_PATH_ERROR); 5245 case_WLAN(MESH_PATH_NOFORWARD); 5246 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 5247 case_WLAN(MAC_EXISTS_IN_MBSS); 5248 case_WLAN(MESH_CHAN_REGULATORY); 5249 case_WLAN(MESH_CHAN); 5250 default: return "<unknown>"; 5251 } 5252 } 5253 5254 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5255 struct ieee80211_mgmt *mgmt, size_t len) 5256 { 5257 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5258 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5259 5260 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5261 5262 if (len < 24 + 2) 5263 return; 5264 5265 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5266 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5267 return; 5268 } 5269 5270 if (ifmgd->associated && 5271 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5272 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5273 sdata->vif.cfg.ap_addr, reason_code, 5274 ieee80211_get_reason_code_string(reason_code)); 5275 5276 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5277 5278 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5279 reason_code, false); 5280 return; 5281 } 5282 5283 if (ifmgd->assoc_data && 5284 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5285 sdata_info(sdata, 5286 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5287 ifmgd->assoc_data->ap_addr, reason_code, 5288 ieee80211_get_reason_code_string(reason_code)); 5289 5290 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5291 5292 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5293 return; 5294 } 5295 } 5296 5297 5298 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5299 struct ieee80211_mgmt *mgmt, size_t len) 5300 { 5301 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5302 u16 reason_code; 5303 5304 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5305 5306 if (len < 24 + 2) 5307 return; 5308 5309 if (!ifmgd->associated || 5310 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5311 return; 5312 5313 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5314 5315 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5316 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5317 return; 5318 } 5319 5320 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5321 sdata->vif.cfg.ap_addr, reason_code, 5322 ieee80211_get_reason_code_string(reason_code)); 5323 5324 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5325 5326 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5327 false); 5328 } 5329 5330 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5331 struct ieee80211_supported_band *sband, 5332 const struct link_sta_info *link_sta, 5333 const struct ieee802_11_elems *elems) 5334 { 5335 const struct ieee80211_sta_he_cap *own_he_cap = 5336 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5337 5338 if (elems->ext_capab_len < 10) 5339 return false; 5340 5341 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5342 return false; 5343 5344 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5345 IEEE80211_HE_MAC_CAP0_TWT_RES && 5346 own_he_cap && 5347 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5348 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5349 } 5350 5351 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5352 struct ieee80211_supported_band *sband, 5353 struct ieee80211_link_data *link, 5354 struct link_sta_info *link_sta, 5355 struct ieee802_11_elems *elems) 5356 { 5357 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5358 5359 if (link->conf->twt_requester != twt) { 5360 link->conf->twt_requester = twt; 5361 return BSS_CHANGED_TWT; 5362 } 5363 return 0; 5364 } 5365 5366 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5367 struct ieee80211_bss_conf *bss_conf, 5368 struct ieee80211_supported_band *sband, 5369 struct link_sta_info *link_sta) 5370 { 5371 const struct ieee80211_sta_he_cap *own_he_cap = 5372 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5373 5374 return bss_conf->he_support && 5375 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5376 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5377 own_he_cap && 5378 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5379 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5380 } 5381 5382 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5383 bool enabled) 5384 { 5385 /* in any case this is called, dialog token should be reset */ 5386 sdata->u.mgd.epcs.dialog_token = 0; 5387 5388 if (sdata->u.mgd.epcs.enabled == enabled) 5389 return; 5390 5391 sdata->u.mgd.epcs.enabled = enabled; 5392 cfg80211_epcs_changed(sdata->dev, enabled); 5393 } 5394 5395 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5396 { 5397 struct ieee80211_local *local = sdata->local; 5398 u8 link_id; 5399 5400 if (!sdata->u.mgd.epcs.enabled) 5401 return; 5402 5403 lockdep_assert_wiphy(local->hw.wiphy); 5404 5405 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5406 struct ieee802_11_elems *elems; 5407 struct ieee80211_link_data *link; 5408 const struct cfg80211_bss_ies *ies; 5409 bool ret; 5410 5411 rcu_read_lock(); 5412 5413 link = sdata_dereference(sdata->link[link_id], sdata); 5414 if (!link || !link->conf || !link->conf->bss) { 5415 rcu_read_unlock(); 5416 continue; 5417 } 5418 5419 if (link->u.mgd.disable_wmm_tracking) { 5420 rcu_read_unlock(); 5421 ieee80211_set_wmm_default(link, false, false); 5422 continue; 5423 } 5424 5425 ies = rcu_dereference(link->conf->bss->beacon_ies); 5426 if (!ies) { 5427 rcu_read_unlock(); 5428 ieee80211_set_wmm_default(link, false, false); 5429 continue; 5430 } 5431 5432 elems = ieee802_11_parse_elems(ies->data, ies->len, 5433 IEEE80211_FTYPE_MGMT | 5434 IEEE80211_STYPE_BEACON, 5435 NULL); 5436 if (!elems) { 5437 rcu_read_unlock(); 5438 ieee80211_set_wmm_default(link, false, false); 5439 continue; 5440 } 5441 5442 ret = _ieee80211_sta_wmm_params(local, link, 5443 elems->wmm_param, 5444 elems->wmm_param_len, 5445 elems->mu_edca_param_set); 5446 5447 kfree(elems); 5448 rcu_read_unlock(); 5449 5450 if (!ret) { 5451 ieee80211_set_wmm_default(link, false, false); 5452 continue; 5453 } 5454 5455 ieee80211_mgd_set_link_qos_params(link); 5456 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5457 } 5458 } 5459 5460 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5461 struct link_sta_info *link_sta, 5462 struct cfg80211_bss *cbss, 5463 struct ieee80211_mgmt *mgmt, 5464 const u8 *elem_start, 5465 unsigned int elem_len, 5466 u64 *changed) 5467 { 5468 struct ieee80211_sub_if_data *sdata = link->sdata; 5469 struct ieee80211_mgd_assoc_data *assoc_data = 5470 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5471 struct ieee80211_bss_conf *bss_conf = link->conf; 5472 struct ieee80211_local *local = sdata->local; 5473 unsigned int link_id = link->link_id; 5474 struct ieee80211_elems_parse_params parse_params = { 5475 .mode = link->u.mgd.conn.mode, 5476 .start = elem_start, 5477 .len = elem_len, 5478 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5479 .from_ap = true, 5480 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5481 }; 5482 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5483 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5484 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5485 const struct cfg80211_bss_ies *bss_ies = NULL; 5486 struct ieee80211_supported_band *sband; 5487 struct ieee802_11_elems *elems; 5488 const __le16 prof_bss_param_ch_present = 5489 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5490 u16 capab_info; 5491 bool ret; 5492 5493 elems = ieee802_11_parse_elems_full(&parse_params); 5494 if (!elems) 5495 return false; 5496 5497 if (link_id == assoc_data->assoc_link_id) { 5498 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5499 5500 /* 5501 * we should not get to this flow unless the association was 5502 * successful, so set the status directly to success 5503 */ 5504 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5505 if (elems->ml_basic) { 5506 int bss_param_ch_cnt = 5507 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5508 5509 if (bss_param_ch_cnt < 0) { 5510 ret = false; 5511 goto out; 5512 } 5513 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5514 bss_conf->bss_param_ch_cnt_link_id = link_id; 5515 } 5516 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5517 !elems->prof || 5518 !(elems->prof->control & prof_bss_param_ch_present)) { 5519 ret = false; 5520 goto out; 5521 } else { 5522 const u8 *ptr = elems->prof->variable + 5523 elems->prof->sta_info_len - 1; 5524 int bss_param_ch_cnt; 5525 5526 /* 5527 * During parsing, we validated that these fields exist, 5528 * otherwise elems->prof would have been set to NULL. 5529 */ 5530 capab_info = get_unaligned_le16(ptr); 5531 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5532 bss_param_ch_cnt = 5533 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5534 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5535 bss_conf->bss_param_ch_cnt_link_id = link_id; 5536 5537 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5538 link_info(link, "association response status code=%u\n", 5539 assoc_data->link[link_id].status); 5540 ret = true; 5541 goto out; 5542 } 5543 } 5544 5545 if (!is_s1g && !elems->supp_rates) { 5546 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5547 ret = false; 5548 goto out; 5549 } 5550 5551 link->u.mgd.tdls_chan_switch_prohibited = 5552 elems->ext_capab && elems->ext_capab_len >= 5 && 5553 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5554 5555 /* 5556 * Some APs are erroneously not including some information in their 5557 * (re)association response frames. Try to recover by using the data 5558 * from the beacon or probe response. This seems to afflict mobile 5559 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5560 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5561 */ 5562 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5563 ((assoc_data->wmm && !elems->wmm_param) || 5564 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5565 (!elems->ht_cap_elem || !elems->ht_operation)) || 5566 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5567 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5568 const struct cfg80211_bss_ies *ies; 5569 struct ieee802_11_elems *bss_elems; 5570 5571 rcu_read_lock(); 5572 ies = rcu_dereference(cbss->ies); 5573 if (ies) 5574 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5575 GFP_ATOMIC); 5576 rcu_read_unlock(); 5577 if (!bss_ies) { 5578 ret = false; 5579 goto out; 5580 } 5581 5582 parse_params.start = bss_ies->data; 5583 parse_params.len = bss_ies->len; 5584 parse_params.bss = cbss; 5585 parse_params.link_id = -1; 5586 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5587 if (!bss_elems) { 5588 ret = false; 5589 goto out; 5590 } 5591 5592 if (assoc_data->wmm && 5593 !elems->wmm_param && bss_elems->wmm_param) { 5594 elems->wmm_param = bss_elems->wmm_param; 5595 sdata_info(sdata, 5596 "AP bug: WMM param missing from AssocResp\n"); 5597 } 5598 5599 /* 5600 * Also check if we requested HT/VHT, otherwise the AP doesn't 5601 * have to include the IEs in the (re)association response. 5602 */ 5603 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5604 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5605 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5606 sdata_info(sdata, 5607 "AP bug: HT capability missing from AssocResp\n"); 5608 } 5609 if (!elems->ht_operation && bss_elems->ht_operation && 5610 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5611 elems->ht_operation = bss_elems->ht_operation; 5612 sdata_info(sdata, 5613 "AP bug: HT operation missing from AssocResp\n"); 5614 } 5615 5616 if (is_5ghz) { 5617 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5618 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5619 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5620 sdata_info(sdata, 5621 "AP bug: VHT capa missing from AssocResp\n"); 5622 } 5623 5624 if (!elems->vht_operation && bss_elems->vht_operation && 5625 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5626 elems->vht_operation = bss_elems->vht_operation; 5627 sdata_info(sdata, 5628 "AP bug: VHT operation missing from AssocResp\n"); 5629 } 5630 } 5631 kfree(bss_elems); 5632 } 5633 5634 /* 5635 * We previously checked these in the beacon/probe response, so 5636 * they should be present here. This is just a safety net. 5637 * Note that the ieee80211_config_bw() below would also check 5638 * for this (and more), but this has better error reporting. 5639 */ 5640 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5641 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5642 sdata_info(sdata, 5643 "HT AP is missing WMM params or HT capability/operation\n"); 5644 ret = false; 5645 goto out; 5646 } 5647 5648 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5649 (!elems->vht_cap_elem || !elems->vht_operation)) { 5650 sdata_info(sdata, 5651 "VHT AP is missing VHT capability/operation\n"); 5652 ret = false; 5653 goto out; 5654 } 5655 5656 /* check/update if AP changed anything in assoc response vs. scan */ 5657 if (ieee80211_config_bw(link, elems, 5658 link_id == assoc_data->assoc_link_id, 5659 changed, 5660 le16_to_cpu(mgmt->frame_control) & 5661 IEEE80211_FCTL_STYPE)) { 5662 ret = false; 5663 goto out; 5664 } 5665 5666 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5667 ret = false; 5668 goto out; 5669 } 5670 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5671 5672 /* Set up internal HT/VHT capabilities */ 5673 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5674 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, &sband->ht_cap, 5675 elems->ht_cap_elem, 5676 link_sta); 5677 5678 if (elems->vht_cap_elem && 5679 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5680 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5681 const struct cfg80211_bss_ies *ies; 5682 5683 /* 5684 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5685 * too large maximum MPDU length in the association response 5686 * (indicating 12k) that it cannot actually process ... 5687 * Work around that. 5688 */ 5689 rcu_read_lock(); 5690 ies = rcu_dereference(cbss->ies); 5691 if (ies) { 5692 const struct element *elem; 5693 5694 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5695 ies->data, ies->len); 5696 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5697 bss_vht_cap = (const void *)elem->data; 5698 } 5699 5700 if (ieee80211_hw_check(&local->hw, STRICT) && 5701 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5702 sizeof(*bss_vht_cap)))) { 5703 rcu_read_unlock(); 5704 ret = false; 5705 link_info(link, "VHT capabilities mismatch\n"); 5706 goto out; 5707 } 5708 5709 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5710 &sband->vht_cap, 5711 elems->vht_cap_elem, 5712 bss_vht_cap, link_sta); 5713 rcu_read_unlock(); 5714 } 5715 5716 if (elems->he_operation && 5717 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5718 elems->he_cap) { 5719 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5720 elems->he_cap, 5721 elems->he_cap_len, 5722 elems->he_6ghz_capa, 5723 link_sta); 5724 5725 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5726 if (elems->rsnx && elems->rsnx_len && 5727 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5728 wiphy_ext_feature_isset(local->hw.wiphy, 5729 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5730 bss_conf->twt_protected = true; 5731 else 5732 bss_conf->twt_protected = false; 5733 5734 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5735 link_sta, elems); 5736 5737 if (elems->eht_operation && elems->eht_cap && 5738 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5739 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5740 elems->he_cap, 5741 elems->he_cap_len, 5742 elems->eht_cap, 5743 elems->eht_cap_len, 5744 link_sta); 5745 5746 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5747 bss_conf->epcs_support = bss_conf->eht_support && 5748 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5749 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5750 5751 /* EPCS might be already enabled but a new added link 5752 * does not support EPCS. This should not really happen 5753 * in practice. 5754 */ 5755 if (sdata->u.mgd.epcs.enabled && 5756 !bss_conf->epcs_support) 5757 ieee80211_epcs_teardown(sdata); 5758 } else { 5759 bss_conf->eht_support = false; 5760 bss_conf->epcs_support = false; 5761 } 5762 } else { 5763 bss_conf->he_support = false; 5764 bss_conf->twt_requester = false; 5765 bss_conf->twt_protected = false; 5766 bss_conf->eht_support = false; 5767 bss_conf->epcs_support = false; 5768 } 5769 5770 if (elems->uhr_operation && elems->uhr_cap && 5771 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_UHR) { 5772 ieee80211_uhr_cap_ie_to_sta_uhr_cap(sdata, sband, 5773 elems->uhr_cap, 5774 elems->uhr_cap_len, 5775 link_sta); 5776 5777 bss_conf->uhr_support = link_sta->pub->uhr_cap.has_uhr; 5778 } else { 5779 bss_conf->uhr_support = false; 5780 } 5781 5782 if (elems->s1g_oper && 5783 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5784 elems->s1g_capab) 5785 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5786 link_sta); 5787 5788 bss_conf->twt_broadcast = 5789 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5790 5791 if (bss_conf->he_support) { 5792 bss_conf->he_bss_color.color = 5793 le32_get_bits(elems->he_operation->he_oper_params, 5794 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5795 bss_conf->he_bss_color.partial = 5796 le32_get_bits(elems->he_operation->he_oper_params, 5797 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5798 bss_conf->he_bss_color.enabled = 5799 !le32_get_bits(elems->he_operation->he_oper_params, 5800 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5801 5802 if (bss_conf->he_bss_color.enabled) 5803 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5804 5805 bss_conf->htc_trig_based_pkt_ext = 5806 le32_get_bits(elems->he_operation->he_oper_params, 5807 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5808 bss_conf->frame_time_rts_th = 5809 le32_get_bits(elems->he_operation->he_oper_params, 5810 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5811 5812 bss_conf->uora_exists = !!elems->uora_element; 5813 if (elems->uora_element) 5814 bss_conf->uora_ocw_range = elems->uora_element[0]; 5815 5816 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5817 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5818 /* TODO: OPEN: what happens if BSS color disable is set? */ 5819 } 5820 5821 if (cbss->transmitted_bss) { 5822 bss_conf->nontransmitted = true; 5823 ether_addr_copy(bss_conf->transmitter_bssid, 5824 cbss->transmitted_bss->bssid); 5825 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5826 bss_conf->bssid_index = cbss->bssid_index; 5827 } 5828 5829 /* 5830 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5831 * in their association response, so ignore that data for our own 5832 * configuration. If it changed since the last beacon, we'll get the 5833 * next beacon and update then. 5834 */ 5835 5836 ieee80211_sta_init_nss_bw_capa(link_sta, &bss_conf->chanreq.oper); 5837 5838 /* If an operating mode notification element is present, use it. */ 5839 if (elems->opmode_notif) 5840 __ieee80211_vht_handle_opmode(sdata, link_sta, 5841 *elems->opmode_notif, 5842 sband->band); 5843 5844 /* 5845 * Always handle WMM once after association regardless 5846 * of the first value the AP uses. Setting -1 here has 5847 * that effect because the AP values is an unsigned 5848 * 4-bit value. 5849 */ 5850 link->u.mgd.wmm_last_param_set = -1; 5851 link->u.mgd.mu_edca_last_param_set = -1; 5852 5853 if (link->u.mgd.disable_wmm_tracking) { 5854 ieee80211_set_wmm_default(link, false, false); 5855 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5856 elems->wmm_param_len, 5857 elems->mu_edca_param_set)) { 5858 /* still enable QoS since we might have HT/VHT */ 5859 ieee80211_set_wmm_default(link, false, true); 5860 /* disable WMM tracking in this case to disable 5861 * tracking WMM parameter changes in the beacon if 5862 * the parameters weren't actually valid. Doing so 5863 * avoids changing parameters very strangely when 5864 * the AP is going back and forth between valid and 5865 * invalid parameters. 5866 */ 5867 link->u.mgd.disable_wmm_tracking = true; 5868 } 5869 5870 if (elems->max_idle_period_ie) { 5871 bss_conf->max_idle_period = 5872 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5873 bss_conf->protected_keep_alive = 5874 !!(elems->max_idle_period_ie->idle_options & 5875 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5876 *changed |= BSS_CHANGED_KEEP_ALIVE; 5877 } else { 5878 bss_conf->max_idle_period = 0; 5879 bss_conf->protected_keep_alive = false; 5880 } 5881 5882 /* set assoc capability (AID was already set earlier), 5883 * ieee80211_set_associated() will tell the driver */ 5884 bss_conf->assoc_capability = capab_info; 5885 5886 ret = true; 5887 out: 5888 kfree(elems); 5889 kfree(bss_ies); 5890 return ret; 5891 } 5892 5893 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5894 struct sta_info *sta, 5895 struct link_sta_info *link_sta, 5896 struct cfg80211_bss *cbss) 5897 { 5898 struct ieee80211_sub_if_data *sdata = link->sdata; 5899 struct ieee80211_local *local = sdata->local; 5900 struct ieee80211_bss *bss = (void *)cbss->priv; 5901 u32 rates = 0, basic_rates = 0; 5902 bool have_higher_than_11mbit = false; 5903 int min_rate = INT_MAX, min_rate_index = -1; 5904 struct ieee80211_supported_band *sband; 5905 5906 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5907 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5908 5909 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5910 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5911 ieee80211_s1g_sta_rate_init(sta); 5912 return 0; 5913 } 5914 5915 sband = local->hw.wiphy->bands[cbss->channel->band]; 5916 5917 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5918 NULL, 0, 5919 &rates, &basic_rates, NULL, 5920 &have_higher_than_11mbit, 5921 &min_rate, &min_rate_index); 5922 5923 /* 5924 * This used to be a workaround for basic rates missing 5925 * in the association response frame. Now that we no 5926 * longer use the basic rates from there, it probably 5927 * doesn't happen any more, but keep the workaround so 5928 * in case some *other* APs are buggy in different ways 5929 * we can connect -- with a warning. 5930 * Allow this workaround only in case the AP provided at least 5931 * one rate. 5932 */ 5933 if (min_rate_index < 0) { 5934 link_info(link, "No legacy rates in association response\n"); 5935 return -EINVAL; 5936 } else if (!basic_rates) { 5937 link_info(link, "No basic rates, using min rate instead\n"); 5938 basic_rates = BIT(min_rate_index); 5939 } 5940 5941 if (rates) 5942 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5943 else 5944 link_info(link, "No rates found, keeping mandatory only\n"); 5945 5946 link->conf->basic_rates = basic_rates; 5947 5948 /* cf. IEEE 802.11 9.2.12 */ 5949 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5950 have_higher_than_11mbit; 5951 5952 return 0; 5953 } 5954 5955 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5956 struct cfg80211_bss *cbss) 5957 { 5958 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5959 const struct element *ht_cap_elem, *vht_cap_elem; 5960 const struct cfg80211_bss_ies *ies; 5961 const struct ieee80211_ht_cap *ht_cap; 5962 const struct ieee80211_vht_cap *vht_cap; 5963 const struct ieee80211_he_cap_elem *he_cap; 5964 const struct element *he_cap_elem; 5965 u16 mcs_80_map, mcs_160_map; 5966 int i, mcs_nss_size; 5967 bool support_160; 5968 u8 chains = 1; 5969 5970 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5971 return chains; 5972 5973 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5974 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5975 ht_cap = (void *)ht_cap_elem->data; 5976 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5977 /* 5978 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5979 * "Tx Unequal Modulation Supported" fields. 5980 */ 5981 } 5982 5983 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5984 return chains; 5985 5986 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5987 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5988 u8 nss; 5989 u16 tx_mcs_map; 5990 5991 vht_cap = (void *)vht_cap_elem->data; 5992 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5993 for (nss = 8; nss > 0; nss--) { 5994 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5995 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5996 break; 5997 } 5998 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5999 chains = max(chains, nss); 6000 } 6001 6002 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 6003 return chains; 6004 6005 ies = rcu_dereference(cbss->ies); 6006 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 6007 ies->data, ies->len); 6008 6009 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 6010 return chains; 6011 6012 /* skip one byte ext_tag_id */ 6013 he_cap = (void *)(he_cap_elem->data + 1); 6014 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 6015 6016 /* invalid HE IE */ 6017 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 6018 return chains; 6019 6020 /* mcs_nss is right after he_cap info */ 6021 he_mcs_nss_supp = (void *)(he_cap + 1); 6022 6023 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 6024 6025 for (i = 7; i >= 0; i--) { 6026 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 6027 6028 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 6029 chains = max_t(u8, chains, i + 1); 6030 break; 6031 } 6032 } 6033 6034 support_160 = he_cap->phy_cap_info[0] & 6035 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 6036 6037 if (!support_160) 6038 return chains; 6039 6040 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 6041 for (i = 7; i >= 0; i--) { 6042 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 6043 6044 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 6045 chains = max_t(u8, chains, i + 1); 6046 break; 6047 } 6048 } 6049 6050 return chains; 6051 } 6052 6053 static void 6054 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 6055 struct ieee80211_supported_band *sband, 6056 struct cfg80211_assoc_request *req, 6057 bool wmm_used, int link_id, 6058 struct ieee80211_conn_settings *conn) 6059 { 6060 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 6061 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 6062 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 6063 const struct ieee80211_sta_he_cap *he_cap; 6064 const struct ieee80211_sta_eht_cap *eht_cap; 6065 const struct ieee80211_sta_uhr_cap *uhr_cap; 6066 struct ieee80211_sta_vht_cap vht_cap; 6067 6068 if (sband->band == NL80211_BAND_S1GHZ) { 6069 conn->mode = IEEE80211_CONN_MODE_S1G; 6070 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6071 mlme_dbg(sdata, "operating as S1G STA\n"); 6072 return; 6073 } 6074 6075 conn->mode = IEEE80211_CONN_MODE_LEGACY; 6076 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6077 6078 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6079 6080 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 6081 mlme_link_id_dbg(sdata, link_id, 6082 "HT disabled by flag, limiting to legacy\n"); 6083 goto out; 6084 } 6085 6086 if (!wmm_used) { 6087 mlme_link_id_dbg(sdata, link_id, 6088 "WMM/QoS not supported, limiting to legacy\n"); 6089 goto out; 6090 } 6091 6092 if (req) { 6093 unsigned int i; 6094 6095 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 6096 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 6097 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 6098 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 6099 netdev_info(sdata->dev, 6100 "WEP/TKIP use, limiting to legacy\n"); 6101 goto out; 6102 } 6103 } 6104 } 6105 6106 if (!sta_ht_cap.ht_supported && !is_6ghz) { 6107 mlme_link_id_dbg(sdata, link_id, 6108 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 6109 goto out; 6110 } 6111 6112 /* HT is fine */ 6113 conn->mode = IEEE80211_CONN_MODE_HT; 6114 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 6115 IEEE80211_CONN_BW_LIMIT_40 : 6116 IEEE80211_CONN_BW_LIMIT_20; 6117 6118 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 6119 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 6120 6121 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 6122 mlme_link_id_dbg(sdata, link_id, 6123 "VHT disabled by flag, limiting to HT\n"); 6124 goto out; 6125 } 6126 6127 if (vht_cap.vht_supported && is_5ghz) { 6128 bool have_80mhz = false; 6129 unsigned int i; 6130 6131 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 6132 mlme_link_id_dbg(sdata, link_id, 6133 "no 40 MHz support on 5 GHz, limiting to HT\n"); 6134 goto out; 6135 } 6136 6137 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 6138 for (i = 0; i < sband->n_channels; i++) { 6139 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 6140 IEEE80211_CHAN_NO_80MHZ)) 6141 continue; 6142 6143 have_80mhz = true; 6144 break; 6145 } 6146 6147 if (!have_80mhz) { 6148 mlme_link_id_dbg(sdata, link_id, 6149 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 6150 goto out; 6151 } 6152 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 6153 mlme_link_id_dbg(sdata, link_id, 6154 "no VHT support on 5 GHz, limiting to HT\n"); 6155 goto out; 6156 } 6157 6158 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 6159 if (sband->band != NL80211_BAND_2GHZ) { 6160 conn->mode = IEEE80211_CONN_MODE_VHT; 6161 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 6162 } 6163 6164 if (is_5ghz && 6165 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 6166 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ | 6167 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) { 6168 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 6169 mlme_link_id_dbg(sdata, link_id, 6170 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 6171 } 6172 6173 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 6174 mlme_link_id_dbg(sdata, link_id, 6175 "HE disabled by flag, limiting to HT/VHT\n"); 6176 goto out; 6177 } 6178 6179 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 6180 if (!he_cap) { 6181 WARN_ON(is_6ghz); 6182 mlme_link_id_dbg(sdata, link_id, 6183 "no HE support, limiting to HT/VHT\n"); 6184 goto out; 6185 } 6186 6187 /* so we have HE */ 6188 conn->mode = IEEE80211_CONN_MODE_HE; 6189 6190 /* check bandwidth */ 6191 switch (sband->band) { 6192 default: 6193 case NL80211_BAND_2GHZ: 6194 if (he_cap->he_cap_elem.phy_cap_info[0] & 6195 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 6196 break; 6197 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6198 mlme_link_id_dbg(sdata, link_id, 6199 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 6200 break; 6201 case NL80211_BAND_5GHZ: 6202 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6203 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 6204 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6205 mlme_link_id_dbg(sdata, link_id, 6206 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 6207 break; 6208 } 6209 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6210 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 6211 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6212 conn->bw_limit, 6213 IEEE80211_CONN_BW_LIMIT_80); 6214 mlme_link_id_dbg(sdata, link_id, 6215 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 6216 } 6217 break; 6218 case NL80211_BAND_6GHZ: 6219 if (he_cap->he_cap_elem.phy_cap_info[0] & 6220 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 6221 break; 6222 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6223 conn->bw_limit, 6224 IEEE80211_CONN_BW_LIMIT_80); 6225 mlme_link_id_dbg(sdata, link_id, 6226 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 6227 break; 6228 } 6229 6230 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 6231 mlme_link_id_dbg(sdata, link_id, 6232 "EHT disabled by flag, limiting to HE\n"); 6233 goto out; 6234 } 6235 6236 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 6237 if (!eht_cap) { 6238 mlme_link_id_dbg(sdata, link_id, 6239 "no EHT support, limiting to HE\n"); 6240 goto out; 6241 } 6242 conn->mode = IEEE80211_CONN_MODE_EHT; 6243 6244 /* check bandwidth */ 6245 if (is_6ghz && 6246 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 6247 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 6248 else if (is_6ghz) 6249 mlme_link_id_dbg(sdata, link_id, 6250 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 6251 6252 if (req && req->flags & ASSOC_REQ_DISABLE_UHR) { 6253 mlme_link_id_dbg(sdata, link_id, 6254 "UHR disabled by flag, limiting to EHT\n"); 6255 goto out; 6256 } 6257 6258 uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 6259 if (!uhr_cap) { 6260 mlme_link_id_dbg(sdata, link_id, 6261 "no UHR support, limiting to EHT\n"); 6262 goto out; 6263 } 6264 conn->mode = IEEE80211_CONN_MODE_UHR; 6265 6266 out: 6267 mlme_link_id_dbg(sdata, link_id, 6268 "determined local STA to be %s, BW limited to %d MHz\n", 6269 ieee80211_conn_mode_str(conn->mode), 6270 20 * (1 << conn->bw_limit)); 6271 } 6272 6273 static void 6274 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6275 struct ieee80211_supported_band *sband, 6276 struct cfg80211_auth_request *req, 6277 bool wmm_used, 6278 struct ieee80211_conn_settings *conn) 6279 { 6280 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6281 req->link_id > 0 ? req->link_id : 0, 6282 conn); 6283 } 6284 6285 static void 6286 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6287 struct ieee80211_supported_band *sband, 6288 struct cfg80211_assoc_request *req, 6289 bool wmm_used, int link_id, 6290 struct ieee80211_conn_settings *conn) 6291 { 6292 struct ieee80211_conn_settings tmp; 6293 6294 WARN_ON(!req); 6295 6296 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6297 &tmp); 6298 6299 conn->mode = min_t(enum ieee80211_conn_mode, 6300 conn->mode, tmp.mode); 6301 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6302 conn->bw_limit, tmp.bw_limit); 6303 } 6304 6305 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6306 struct ieee80211_link_data *link, 6307 int link_id, 6308 struct cfg80211_bss *cbss, bool mlo, 6309 struct ieee80211_conn_settings *conn, 6310 unsigned long *userspace_selectors) 6311 { 6312 struct ieee80211_local *local = sdata->local; 6313 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6314 struct ieee80211_chan_req chanreq = {}; 6315 struct cfg80211_chan_def ap_chandef; 6316 struct ieee802_11_elems *elems; 6317 int ret; 6318 6319 lockdep_assert_wiphy(local->hw.wiphy); 6320 6321 rcu_read_lock(); 6322 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6323 &chanreq, &ap_chandef, 6324 userspace_selectors); 6325 6326 if (IS_ERR(elems)) { 6327 rcu_read_unlock(); 6328 return PTR_ERR(elems); 6329 } 6330 6331 if (mlo && !elems->ml_basic) { 6332 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6333 rcu_read_unlock(); 6334 kfree(elems); 6335 return -EINVAL; 6336 } 6337 6338 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6339 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6340 6341 if (elems->pwr_constr_elem) 6342 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6343 6344 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6345 if (he_6ghz_oper) 6346 link->conf->power_type = 6347 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6348 cbss->channel->flags); 6349 else 6350 link_info(link, 6351 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6352 cbss->channel->center_freq); 6353 6354 link->conf->tpe = elems->tpe; 6355 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6356 &chanreq.oper); 6357 } 6358 rcu_read_unlock(); 6359 /* the element data was RCU protected so no longer valid anyway */ 6360 kfree(elems); 6361 elems = NULL; 6362 6363 if (!link) 6364 return 0; 6365 6366 rcu_read_lock(); 6367 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6368 local->rx_chains); 6369 rcu_read_unlock(); 6370 6371 /* 6372 * If this fails (possibly due to channel context sharing 6373 * on incompatible channels, e.g. 80+80 and 160 sharing the 6374 * same control channel) try to use a smaller bandwidth. 6375 */ 6376 ret = ieee80211_link_use_channel(link, &chanreq, 6377 IEEE80211_CHANCTX_SHARED); 6378 6379 /* don't downgrade for 5/10/S1G MHz channels, though. */ 6380 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6381 chanreq.oper.width == NL80211_CHAN_WIDTH_10 || 6382 cfg80211_chandef_is_s1g(&chanreq.oper)) 6383 return ret; 6384 6385 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6386 ieee80211_chanreq_downgrade(&chanreq, conn); 6387 6388 ret = ieee80211_link_use_channel(link, &chanreq, 6389 IEEE80211_CHANCTX_SHARED); 6390 } 6391 6392 return ret; 6393 } 6394 6395 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6396 u8 *dtim_count, u8 *dtim_period) 6397 { 6398 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6399 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6400 ies->len); 6401 const struct ieee80211_tim_ie *tim = NULL; 6402 const struct ieee80211_bssid_index *idx; 6403 bool valid = tim_ie && tim_ie[1] >= 2; 6404 6405 if (valid) 6406 tim = (void *)(tim_ie + 2); 6407 6408 if (dtim_count) 6409 *dtim_count = valid ? tim->dtim_count : 0; 6410 6411 if (dtim_period) 6412 *dtim_period = valid ? tim->dtim_period : 0; 6413 6414 /* Check if value is overridden by non-transmitted profile */ 6415 if (!idx_ie || idx_ie[1] < 3) 6416 return valid; 6417 6418 idx = (void *)(idx_ie + 2); 6419 6420 if (dtim_count) 6421 *dtim_count = idx->dtim_count; 6422 6423 if (dtim_period) 6424 *dtim_period = idx->dtim_period; 6425 6426 return true; 6427 } 6428 6429 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6430 { 6431 if (bm_size == 1) 6432 return *data; 6433 6434 return get_unaligned_le16(data); 6435 } 6436 6437 static int 6438 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6439 const struct ieee80211_ttlm_elem *ttlm, 6440 struct ieee80211_adv_ttlm_info *ttlm_info) 6441 { 6442 /* The element size was already validated in 6443 * ieee80211_tid_to_link_map_size_ok() 6444 */ 6445 u8 control, link_map_presence, map_size, tid; 6446 u8 *pos; 6447 6448 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6449 pos = (void *)ttlm->optional; 6450 control = ttlm->control; 6451 6452 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6453 IEEE80211_TTLM_DIRECTION_BOTH) { 6454 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6455 return -EINVAL; 6456 } 6457 6458 if (!(control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP)) { 6459 link_map_presence = *pos; 6460 pos++; 6461 } 6462 6463 if (control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT) { 6464 ttlm_info->switch_time = get_unaligned_le16(pos); 6465 6466 /* Since ttlm_info->switch_time == 0 means no switch time, bump 6467 * it by 1. 6468 */ 6469 if (!ttlm_info->switch_time) 6470 ttlm_info->switch_time = 1; 6471 6472 pos += 2; 6473 } 6474 6475 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6476 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6477 pos += 3; 6478 } 6479 6480 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6481 ttlm_info->map = 0xffff; 6482 return 0; 6483 } 6484 6485 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6486 map_size = 1; 6487 else 6488 map_size = 2; 6489 6490 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6491 * not advertise a TID-to-link mapping that does not map all TIDs to the 6492 * same link set, reject frame if not all links have mapping 6493 */ 6494 if (link_map_presence != 0xff) { 6495 sdata_info(sdata, 6496 "Invalid advertised T2L mapping presence indicator\n"); 6497 return -EINVAL; 6498 } 6499 6500 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6501 if (!ttlm_info->map) { 6502 sdata_info(sdata, 6503 "Invalid advertised T2L map for TID 0\n"); 6504 return -EINVAL; 6505 } 6506 6507 pos += map_size; 6508 6509 for (tid = 1; tid < 8; tid++) { 6510 u16 map = ieee80211_get_ttlm(map_size, pos); 6511 6512 if (map != ttlm_info->map) { 6513 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6514 tid); 6515 return -EINVAL; 6516 } 6517 6518 pos += map_size; 6519 } 6520 return 0; 6521 } 6522 6523 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6524 struct ieee80211_mgmt *mgmt, 6525 struct ieee802_11_elems *elems, 6526 const u8 *elem_start, unsigned int elem_len) 6527 { 6528 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6529 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6530 struct ieee80211_local *local = sdata->local; 6531 unsigned int link_id; 6532 struct sta_info *sta; 6533 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6534 u16 valid_links = 0, dormant_links = 0; 6535 int err; 6536 6537 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6538 /* 6539 * station info was already allocated and inserted before 6540 * the association and should be available to us 6541 */ 6542 sta = sta_info_get(sdata, assoc_data->ap_addr); 6543 if (WARN_ON(!sta)) 6544 goto out_err; 6545 6546 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6547 6548 if (ieee80211_vif_is_mld(&sdata->vif)) { 6549 if (!elems->ml_basic) 6550 goto out_err; 6551 6552 sta->sta.ext_mld_capa_ops = 6553 ieee80211_mle_get_ext_mld_capa_op((const void *)elems->ml_basic); 6554 6555 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6556 if (!assoc_data->link[link_id].bss) 6557 continue; 6558 6559 valid_links |= BIT(link_id); 6560 6561 if (link_id != assoc_data->assoc_link_id) { 6562 err = ieee80211_sta_allocate_link(sta, link_id); 6563 if (err) 6564 goto out_err; 6565 } 6566 } 6567 6568 /* 6569 * We do not support setting a negotiated TTLM during 6570 * association. As such, we can assume that if there is a TTLM, 6571 * then it is the currently active advertised TTLM. 6572 * In that case, there must be exactly one TTLM that does not 6573 * have a switch time set. This mapping should also leave us 6574 * with at least one usable link. 6575 */ 6576 if (elems->ttlm_num > 1) { 6577 sdata_info(sdata, 6578 "More than one advertised TTLM in association response\n"); 6579 goto out_err; 6580 } else if (elems->ttlm_num == 1) { 6581 if (ieee80211_parse_adv_t2l(sdata, elems->ttlm[0], 6582 &sdata->u.mgd.ttlm_info) || 6583 sdata->u.mgd.ttlm_info.switch_time != 0 || 6584 !(valid_links & sdata->u.mgd.ttlm_info.map)) { 6585 sdata_info(sdata, 6586 "Invalid advertised TTLM in association response\n"); 6587 goto out_err; 6588 } 6589 6590 sdata->u.mgd.ttlm_info.active = true; 6591 dormant_links = 6592 valid_links & ~sdata->u.mgd.ttlm_info.map; 6593 } 6594 6595 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6596 } 6597 6598 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6599 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6600 struct ieee80211_link_data *link; 6601 struct link_sta_info *link_sta; 6602 6603 if (!cbss) 6604 continue; 6605 6606 link = sdata_dereference(sdata->link[link_id], sdata); 6607 if (WARN_ON(!link)) 6608 goto out_err; 6609 6610 if (ieee80211_vif_is_mld(&sdata->vif)) 6611 link_info(link, 6612 "local address %pM, AP link address %pM%s\n", 6613 link->conf->addr, 6614 assoc_data->link[link_id].bss->bssid, 6615 link_id == assoc_data->assoc_link_id ? 6616 " (assoc)" : ""); 6617 6618 link_sta = rcu_dereference_protected(sta->link[link_id], 6619 lockdep_is_held(&local->hw.wiphy->mtx)); 6620 if (WARN_ON(!link_sta)) 6621 goto out_err; 6622 6623 if (!link->u.mgd.have_beacon) { 6624 const struct cfg80211_bss_ies *ies; 6625 6626 rcu_read_lock(); 6627 ies = rcu_dereference(cbss->beacon_ies); 6628 if (ies) 6629 link->u.mgd.have_beacon = true; 6630 else 6631 ies = rcu_dereference(cbss->ies); 6632 ieee80211_get_dtim(ies, 6633 &link->conf->sync_dtim_count, 6634 &link->u.mgd.dtim_period); 6635 link->conf->beacon_int = cbss->beacon_interval; 6636 rcu_read_unlock(); 6637 } 6638 6639 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6640 6641 if (link_id != assoc_data->assoc_link_id) { 6642 link->u.mgd.conn = assoc_data->link[link_id].conn; 6643 6644 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6645 true, &link->u.mgd.conn, 6646 sdata->u.mgd.userspace_selectors); 6647 if (err) { 6648 link_info(link, "prep_channel failed\n"); 6649 goto out_err; 6650 } 6651 } 6652 6653 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6654 assoc_data->link[link_id].bss); 6655 if (err) 6656 goto out_err; 6657 6658 if (!ieee80211_assoc_config_link(link, link_sta, 6659 assoc_data->link[link_id].bss, 6660 mgmt, elem_start, elem_len, 6661 &changed[link_id])) 6662 goto out_err; 6663 6664 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6665 valid_links &= ~BIT(link_id); 6666 ieee80211_sta_remove_link(sta, link_id); 6667 continue; 6668 } 6669 6670 if (link_id != assoc_data->assoc_link_id) { 6671 err = ieee80211_sta_activate_link(sta, link_id); 6672 if (err) 6673 goto out_err; 6674 } 6675 } 6676 6677 /* links might have changed due to rejected ones, set them again */ 6678 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6679 6680 rate_control_rate_init_all_links(sta); 6681 6682 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6683 set_sta_flag(sta, WLAN_STA_MFP); 6684 sta->sta.mfp = true; 6685 } else { 6686 sta->sta.mfp = false; 6687 } 6688 6689 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6690 elems->ext_capab_len); 6691 6692 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6693 local->hw.queues >= IEEE80211_NUM_ACS; 6694 6695 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6696 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6697 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6698 if (err) { 6699 sdata_info(sdata, 6700 "failed to move station %pM to desired state\n", 6701 sta->sta.addr); 6702 WARN_ON(__sta_info_destroy(sta)); 6703 goto out_err; 6704 } 6705 6706 if (sdata->wdev.use_4addr) 6707 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6708 6709 ieee80211_set_associated(sdata, assoc_data, changed); 6710 6711 /* 6712 * If we're using 4-addr mode, let the AP know that we're 6713 * doing so, so that it can create the STA VLAN on its side 6714 */ 6715 if (ifmgd->use_4addr) 6716 ieee80211_send_4addr_nullfunc(local, sdata); 6717 6718 /* 6719 * Start timer to probe the connection to the AP now. 6720 * Also start the timer that will detect beacon loss. 6721 */ 6722 ieee80211_sta_reset_beacon_monitor(sdata); 6723 ieee80211_sta_reset_conn_monitor(sdata); 6724 6725 return true; 6726 out_err: 6727 eth_zero_addr(sdata->vif.cfg.ap_addr); 6728 return false; 6729 } 6730 6731 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6732 struct ieee80211_mgmt *mgmt, 6733 size_t len) 6734 { 6735 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6736 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6737 u16 capab_info, status_code, aid; 6738 struct ieee80211_elems_parse_params parse_params = { 6739 .bss = NULL, 6740 .link_id = -1, 6741 .from_ap = true, 6742 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 6743 }; 6744 struct ieee802_11_elems *elems; 6745 struct sta_info *sta; 6746 int ac; 6747 const u8 *elem_start; 6748 unsigned int elem_len; 6749 bool reassoc; 6750 struct ieee80211_event event = { 6751 .type = MLME_EVENT, 6752 .u.mlme.data = ASSOC_EVENT, 6753 }; 6754 struct ieee80211_prep_tx_info info = {}; 6755 struct cfg80211_rx_assoc_resp_data resp = { 6756 .uapsd_queues = -1, 6757 }; 6758 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6759 unsigned int link_id; 6760 u16 max_aid = IEEE80211_MAX_AID; 6761 6762 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6763 6764 if (!assoc_data) 6765 return; 6766 6767 info.link_id = assoc_data->assoc_link_id; 6768 6769 parse_params.mode = 6770 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6771 6772 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6773 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6774 return; 6775 6776 /* 6777 * AssocResp and ReassocResp have identical structure, so process both 6778 * of them in this function. 6779 */ 6780 6781 if (len < 24 + 6) 6782 return; 6783 6784 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6785 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6786 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6787 if (assoc_data->s1g) { 6788 elem_start = mgmt->u.s1g_assoc_resp.variable; 6789 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6790 } else { 6791 elem_start = mgmt->u.assoc_resp.variable; 6792 } 6793 6794 /* 6795 * Note: this may not be perfect, AP might misbehave - if 6796 * anyone needs to rely on perfect complete notification 6797 * with the exact right subtype, then we need to track what 6798 * we actually transmitted. 6799 */ 6800 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6801 IEEE80211_STYPE_ASSOC_REQ; 6802 6803 if (assoc_data->fils_kek_len && 6804 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6805 return; 6806 6807 elem_len = len - (elem_start - (u8 *)mgmt); 6808 parse_params.start = elem_start; 6809 parse_params.len = elem_len; 6810 elems = ieee802_11_parse_elems_full(&parse_params); 6811 if (!elems) 6812 goto notify_driver; 6813 6814 if (elems->aid_resp) 6815 aid = le16_to_cpu(elems->aid_resp->aid); 6816 else 6817 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6818 6819 /* 6820 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6821 * an S1G STA the 3 MSBs are reserved. 6822 * (802.11-2016 9.4.1.8 AID field). 6823 */ 6824 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6825 6826 sdata_info(sdata, 6827 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6828 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6829 capab_info, status_code, aid); 6830 6831 ifmgd->broken_ap = false; 6832 6833 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6834 elems->timeout_int && 6835 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6836 u32 tu, ms; 6837 6838 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6839 le32_to_cpu(elems->timeout_int->value)); 6840 6841 tu = le32_to_cpu(elems->timeout_int->value); 6842 ms = tu * 1024 / 1000; 6843 sdata_info(sdata, 6844 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6845 assoc_data->ap_addr, tu, ms); 6846 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6847 assoc_data->timeout_started = true; 6848 assoc_data->comeback = true; 6849 if (ms > IEEE80211_ASSOC_TIMEOUT) 6850 run_again(sdata, assoc_data->timeout); 6851 goto notify_driver; 6852 } 6853 6854 if (status_code != WLAN_STATUS_SUCCESS) { 6855 sdata_info(sdata, "%pM denied association (code=%d)\n", 6856 assoc_data->ap_addr, status_code); 6857 event.u.mlme.status = MLME_DENIED; 6858 event.u.mlme.reason = status_code; 6859 drv_event_callback(sdata->local, sdata, &event); 6860 } else { 6861 if (aid == 0 || aid > max_aid) { 6862 sdata_info(sdata, 6863 "invalid AID value %d (out of range), turn off PS\n", 6864 aid); 6865 aid = 0; 6866 ifmgd->broken_ap = true; 6867 } 6868 6869 if (ieee80211_vif_is_mld(&sdata->vif)) { 6870 struct ieee80211_mle_basic_common_info *common; 6871 6872 if (!elems->ml_basic) { 6873 sdata_info(sdata, 6874 "MLO association with %pM but no (basic) multi-link element in response!\n", 6875 assoc_data->ap_addr); 6876 goto abandon_assoc; 6877 } 6878 6879 common = (void *)elems->ml_basic->variable; 6880 6881 if (memcmp(assoc_data->ap_addr, 6882 common->mld_mac_addr, ETH_ALEN)) { 6883 sdata_info(sdata, 6884 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6885 common->mld_mac_addr, 6886 assoc_data->ap_addr); 6887 goto abandon_assoc; 6888 } 6889 6890 sdata->vif.cfg.eml_cap = 6891 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6892 sdata->vif.cfg.eml_med_sync_delay = 6893 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6894 sdata->vif.cfg.mld_capa_op = 6895 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6896 } 6897 6898 sdata->vif.cfg.aid = aid; 6899 sdata->vif.cfg.s1g = assoc_data->s1g; 6900 6901 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6902 elem_start, elem_len)) { 6903 /* oops -- internal error -- send timeout for now */ 6904 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6905 goto notify_driver; 6906 } 6907 event.u.mlme.status = MLME_SUCCESS; 6908 drv_event_callback(sdata->local, sdata, &event); 6909 sdata_info(sdata, "associated\n"); 6910 6911 info.success = 1; 6912 } 6913 6914 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6915 struct ieee80211_link_data *link; 6916 6917 if (!assoc_data->link[link_id].bss) 6918 continue; 6919 6920 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6921 ether_addr_copy(resp.links[link_id].addr, 6922 assoc_data->link[link_id].addr); 6923 resp.links[link_id].status = assoc_data->link[link_id].status; 6924 6925 link = sdata_dereference(sdata->link[link_id], sdata); 6926 if (!link) 6927 continue; 6928 6929 /* get uapsd queues configuration - same for all links */ 6930 resp.uapsd_queues = 0; 6931 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6932 if (link->tx_conf[ac].uapsd) 6933 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6934 } 6935 6936 if (ieee80211_vif_is_mld(&sdata->vif)) { 6937 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6938 resp.ap_mld_addr = ap_mld_addr; 6939 } 6940 6941 /* 6942 * If epp_peer set, unprotected (Re)Association Request/Response frames 6943 * are dropped, which ensures that the (re)association exchange is 6944 * encrypted over the air. 6945 */ 6946 sta = sta_info_get_bss(sdata, sdata->vif.cfg.ap_addr); 6947 resp.assoc_encrypted = sta && sta->sta.epp_peer; 6948 6949 ieee80211_destroy_assoc_data(sdata, 6950 status_code == WLAN_STATUS_SUCCESS ? 6951 ASSOC_SUCCESS : 6952 ASSOC_REJECTED); 6953 6954 resp.buf = (u8 *)mgmt; 6955 resp.len = len; 6956 resp.req_ies = ifmgd->assoc_req_ies; 6957 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6958 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6959 notify_driver: 6960 drv_mgd_complete_tx(sdata->local, sdata, &info); 6961 kfree(elems); 6962 return; 6963 abandon_assoc: 6964 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6965 goto notify_driver; 6966 } 6967 6968 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6969 struct ieee80211_mgmt *mgmt, size_t len, 6970 struct ieee80211_rx_status *rx_status) 6971 { 6972 struct ieee80211_sub_if_data *sdata = link->sdata; 6973 struct ieee80211_local *local = sdata->local; 6974 struct ieee80211_bss *bss; 6975 struct ieee80211_channel *channel; 6976 6977 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6978 6979 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6980 ieee80211_rx_status_to_khz(rx_status)); 6981 if (!channel) 6982 return; 6983 6984 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6985 if (bss) { 6986 link->conf->beacon_rate = bss->beacon_rate; 6987 ieee80211_rx_bss_put(local, bss); 6988 } 6989 } 6990 6991 6992 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6993 struct sk_buff *skb) 6994 { 6995 struct ieee80211_sub_if_data *sdata = link->sdata; 6996 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6997 struct ieee80211_if_managed *ifmgd; 6998 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6999 struct ieee80211_channel *channel; 7000 size_t baselen, len = skb->len; 7001 7002 ifmgd = &sdata->u.mgd; 7003 7004 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7005 7006 /* 7007 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 7008 * "If a 6 GHz AP receives a Probe Request frame and responds with 7009 * a Probe Response frame [..], the Address 1 field of the Probe 7010 * Response frame shall be set to the broadcast address [..]" 7011 * So, on 6GHz band we should also accept broadcast responses. 7012 */ 7013 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 7014 ieee80211_rx_status_to_khz(rx_status)); 7015 if (!channel) 7016 return; 7017 7018 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 7019 (channel->band != NL80211_BAND_6GHZ || 7020 !is_broadcast_ether_addr(mgmt->da))) 7021 return; /* ignore ProbeResp to foreign address */ 7022 7023 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 7024 if (baselen > len) 7025 return; 7026 7027 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7028 7029 if (ifmgd->associated && 7030 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 7031 ieee80211_reset_ap_probe(sdata); 7032 } 7033 7034 /* 7035 * This is the canonical list of information elements we care about, 7036 * the filter code also gives us all changes to the Microsoft OUI 7037 * (00:50:F2) vendor IE which is used for WMM which we need to track, 7038 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 7039 * changes to requested client power. 7040 * 7041 * We implement beacon filtering in software since that means we can 7042 * avoid processing the frame here and in cfg80211, and userspace 7043 * will not be able to tell whether the hardware supports it or not. 7044 * 7045 * XXX: This list needs to be dynamic -- userspace needs to be able to 7046 * add items it requires. It also needs to be able to tell us to 7047 * look out for other vendor IEs. 7048 */ 7049 static const u64 care_about_ies = 7050 (1ULL << WLAN_EID_COUNTRY) | 7051 (1ULL << WLAN_EID_ERP_INFO) | 7052 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 7053 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 7054 (1ULL << WLAN_EID_HT_CAPABILITY) | 7055 (1ULL << WLAN_EID_HT_OPERATION) | 7056 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 7057 7058 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 7059 struct ieee80211_if_managed *ifmgd, 7060 struct ieee80211_bss_conf *bss_conf, 7061 struct ieee80211_local *local, 7062 struct ieee80211_rx_status *rx_status) 7063 { 7064 struct ieee80211_sub_if_data *sdata = link->sdata; 7065 7066 /* Track average RSSI from the Beacon frames of the current AP */ 7067 7068 if (!link->u.mgd.tracking_signal_avg) { 7069 link->u.mgd.tracking_signal_avg = true; 7070 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 7071 link->u.mgd.last_cqm_event_signal = 0; 7072 link->u.mgd.count_beacon_signal = 1; 7073 link->u.mgd.last_ave_beacon_signal = 0; 7074 } else { 7075 link->u.mgd.count_beacon_signal++; 7076 } 7077 7078 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 7079 -rx_status->signal); 7080 7081 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 7082 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 7083 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7084 int last_sig = link->u.mgd.last_ave_beacon_signal; 7085 struct ieee80211_event event = { 7086 .type = RSSI_EVENT, 7087 }; 7088 7089 /* 7090 * if signal crosses either of the boundaries, invoke callback 7091 * with appropriate parameters 7092 */ 7093 if (sig > ifmgd->rssi_max_thold && 7094 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 7095 link->u.mgd.last_ave_beacon_signal = sig; 7096 event.u.rssi.data = RSSI_EVENT_HIGH; 7097 drv_event_callback(local, sdata, &event); 7098 } else if (sig < ifmgd->rssi_min_thold && 7099 (last_sig >= ifmgd->rssi_max_thold || 7100 last_sig == 0)) { 7101 link->u.mgd.last_ave_beacon_signal = sig; 7102 event.u.rssi.data = RSSI_EVENT_LOW; 7103 drv_event_callback(local, sdata, &event); 7104 } 7105 } 7106 7107 if (bss_conf->cqm_rssi_thold && 7108 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 7109 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 7110 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7111 int last_event = link->u.mgd.last_cqm_event_signal; 7112 int thold = bss_conf->cqm_rssi_thold; 7113 int hyst = bss_conf->cqm_rssi_hyst; 7114 7115 if (sig < thold && 7116 (last_event == 0 || sig < last_event - hyst)) { 7117 link->u.mgd.last_cqm_event_signal = sig; 7118 ieee80211_cqm_rssi_notify( 7119 &sdata->vif, 7120 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7121 sig, GFP_KERNEL); 7122 } else if (sig > thold && 7123 (last_event == 0 || sig > last_event + hyst)) { 7124 link->u.mgd.last_cqm_event_signal = sig; 7125 ieee80211_cqm_rssi_notify( 7126 &sdata->vif, 7127 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7128 sig, GFP_KERNEL); 7129 } 7130 } 7131 7132 if (bss_conf->cqm_rssi_low && 7133 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 7134 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7135 int last_event = link->u.mgd.last_cqm_event_signal; 7136 int low = bss_conf->cqm_rssi_low; 7137 int high = bss_conf->cqm_rssi_high; 7138 7139 if (sig < low && 7140 (last_event == 0 || last_event >= low)) { 7141 link->u.mgd.last_cqm_event_signal = sig; 7142 ieee80211_cqm_rssi_notify( 7143 &sdata->vif, 7144 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7145 sig, GFP_KERNEL); 7146 } else if (sig > high && 7147 (last_event == 0 || last_event <= high)) { 7148 link->u.mgd.last_cqm_event_signal = sig; 7149 ieee80211_cqm_rssi_notify( 7150 &sdata->vif, 7151 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7152 sig, GFP_KERNEL); 7153 } 7154 } 7155 } 7156 7157 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 7158 struct cfg80211_bss *bss) 7159 { 7160 if (ether_addr_equal(tx_bssid, bss->bssid)) 7161 return true; 7162 if (!bss->transmitted_bss) 7163 return false; 7164 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 7165 } 7166 7167 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 7168 struct wiphy_work *work) 7169 { 7170 struct ieee80211_sub_if_data *sdata = 7171 container_of(work, struct ieee80211_sub_if_data, 7172 u.mgd.ml_reconf_work.work); 7173 u16 new_valid_links, new_active_links, new_dormant_links; 7174 struct sta_info *sta; 7175 int ret; 7176 7177 if (!sdata->u.mgd.removed_links) 7178 return; 7179 7180 sdata_info(sdata, 7181 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 7182 sdata->vif.valid_links, sdata->u.mgd.removed_links); 7183 7184 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 7185 if (new_valid_links == sdata->vif.valid_links) 7186 return; 7187 7188 if (!new_valid_links || 7189 !(new_valid_links & ~sdata->vif.dormant_links)) { 7190 sdata_info(sdata, "No valid links after reconfiguration\n"); 7191 ret = -EINVAL; 7192 goto out; 7193 } 7194 7195 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 7196 if (new_active_links != sdata->vif.active_links) { 7197 if (!new_active_links) 7198 new_active_links = 7199 BIT(ffs(new_valid_links & 7200 ~sdata->vif.dormant_links) - 1); 7201 7202 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 7203 if (ret) { 7204 sdata_info(sdata, 7205 "Failed setting active links\n"); 7206 goto out; 7207 } 7208 } 7209 7210 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7211 if (sta) { 7212 unsigned long removed_links = sdata->u.mgd.removed_links; 7213 unsigned int link_id; 7214 7215 for_each_set_bit(link_id, &removed_links, 7216 IEEE80211_MLD_MAX_NUM_LINKS) 7217 ieee80211_sta_remove_link(sta, link_id); 7218 } 7219 7220 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 7221 7222 ret = ieee80211_vif_set_links(sdata, new_valid_links, 7223 new_dormant_links); 7224 if (ret) 7225 sdata_info(sdata, "Failed setting valid links\n"); 7226 7227 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 7228 7229 out: 7230 if (!ret) 7231 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 7232 else 7233 __ieee80211_disconnect(sdata); 7234 7235 sdata->u.mgd.removed_links = 0; 7236 } 7237 7238 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 7239 struct ieee802_11_elems *elems) 7240 { 7241 const struct element *sub; 7242 unsigned long removed_links = 0; 7243 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7244 u8 link_id; 7245 u32 delay; 7246 7247 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 7248 return; 7249 7250 /* Directly parse the sub elements as the common information doesn't 7251 * hold any useful information. 7252 */ 7253 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 7254 elems->ml_reconf_len) { 7255 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7256 u8 *pos = prof->variable; 7257 u16 control; 7258 7259 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 7260 continue; 7261 7262 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 7263 sub->datalen)) 7264 return; 7265 7266 control = le16_to_cpu(prof->control); 7267 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 7268 7269 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7270 continue; 7271 7272 removed_links |= BIT(link_id); 7273 7274 /* the MAC address should not be included, but handle it */ 7275 if (control & 7276 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 7277 pos += 6; 7278 7279 /* According to Draft P802.11be_D3.0, the control should 7280 * include the AP Removal Timer present. If the AP Removal Timer 7281 * is not present assume immediate removal. 7282 */ 7283 if (control & 7284 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 7285 link_removal_timeout[link_id] = get_unaligned_le16(pos); 7286 } 7287 7288 removed_links &= sdata->vif.valid_links; 7289 if (!removed_links) { 7290 /* In case the removal was cancelled, abort it */ 7291 if (sdata->u.mgd.removed_links) { 7292 sdata->u.mgd.removed_links = 0; 7293 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7294 &sdata->u.mgd.ml_reconf_work); 7295 } 7296 return; 7297 } 7298 7299 delay = 0; 7300 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 7301 struct ieee80211_bss_conf *link_conf = 7302 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 7303 u32 link_delay; 7304 7305 if (!link_conf) { 7306 removed_links &= ~BIT(link_id); 7307 continue; 7308 } 7309 7310 if (link_removal_timeout[link_id] < 1) 7311 link_delay = 0; 7312 else 7313 link_delay = link_conf->beacon_int * 7314 (link_removal_timeout[link_id] - 1); 7315 7316 if (!delay) 7317 delay = link_delay; 7318 else 7319 delay = min(delay, link_delay); 7320 } 7321 7322 sdata->u.mgd.removed_links = removed_links; 7323 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7324 &sdata->u.mgd.ml_reconf_work, 7325 us_to_ktime(ieee80211_tu_to_usec(delay))); 7326 } 7327 7328 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 7329 u16 active_links, u16 dormant_links, 7330 u16 suspended_links) 7331 { 7332 u64 changed = 0; 7333 int ret; 7334 7335 if (!active_links) { 7336 ret = -EINVAL; 7337 goto out; 7338 } 7339 7340 /* If there is an active negotiated TTLM, it should be discarded by 7341 * the new negotiated/advertised TTLM. 7342 */ 7343 if (sdata->vif.neg_ttlm.valid) { 7344 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7345 sdata->vif.suspended_links = 0; 7346 changed = BSS_CHANGED_MLD_TTLM; 7347 } 7348 7349 if (sdata->vif.active_links != active_links) { 7350 /* usable links are affected when active_links are changed, 7351 * so notify the driver about the status change 7352 */ 7353 changed |= BSS_CHANGED_MLD_VALID_LINKS; 7354 active_links &= sdata->vif.active_links; 7355 if (!active_links) 7356 active_links = 7357 BIT(__ffs(sdata->vif.valid_links & 7358 ~dormant_links)); 7359 ret = ieee80211_set_active_links(&sdata->vif, active_links); 7360 if (ret) { 7361 sdata_info(sdata, "Failed to set TTLM active links\n"); 7362 goto out; 7363 } 7364 } 7365 7366 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7367 dormant_links); 7368 if (ret) { 7369 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 7370 goto out; 7371 } 7372 7373 sdata->vif.suspended_links = suspended_links; 7374 if (sdata->vif.suspended_links) 7375 changed |= BSS_CHANGED_MLD_TTLM; 7376 7377 ieee80211_vif_cfg_change_notify(sdata, changed); 7378 7379 out: 7380 if (ret) 7381 ieee80211_disconnect(&sdata->vif, false); 7382 7383 return ret; 7384 } 7385 7386 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 7387 struct wiphy_work *work) 7388 { 7389 u16 new_active_links, new_dormant_links; 7390 struct ieee80211_sub_if_data *sdata = 7391 container_of(work, struct ieee80211_sub_if_data, 7392 u.mgd.ttlm_work.work); 7393 7394 new_active_links = sdata->u.mgd.ttlm_info.map & 7395 sdata->vif.valid_links; 7396 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 7397 sdata->vif.valid_links; 7398 7399 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 7400 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 7401 0)) 7402 return; 7403 7404 sdata->u.mgd.ttlm_info.active = true; 7405 sdata->u.mgd.ttlm_info.switch_time = 0; 7406 } 7407 7408 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7409 struct ieee802_11_elems *elems, 7410 u64 beacon_ts) 7411 { 7412 u8 i; 7413 int ret; 7414 7415 if (!ieee80211_vif_is_mld(&sdata->vif)) 7416 return; 7417 7418 if (!elems->ttlm_num) { 7419 if (sdata->u.mgd.ttlm_info.switch_time) { 7420 /* if a planned TID-to-link mapping was cancelled - 7421 * abort it 7422 */ 7423 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7424 &sdata->u.mgd.ttlm_work); 7425 } else if (sdata->u.mgd.ttlm_info.active) { 7426 /* if no TID-to-link element, set to default mapping in 7427 * which all TIDs are mapped to all setup links 7428 */ 7429 ret = ieee80211_vif_set_links(sdata, 7430 sdata->vif.valid_links, 7431 0); 7432 if (ret) { 7433 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7434 return; 7435 } 7436 ieee80211_vif_cfg_change_notify(sdata, 7437 BSS_CHANGED_MLD_VALID_LINKS); 7438 } 7439 memset(&sdata->u.mgd.ttlm_info, 0, 7440 sizeof(sdata->u.mgd.ttlm_info)); 7441 return; 7442 } 7443 7444 for (i = 0; i < elems->ttlm_num; i++) { 7445 struct ieee80211_adv_ttlm_info ttlm_info; 7446 u32 res; 7447 7448 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7449 &ttlm_info); 7450 7451 if (res) { 7452 __ieee80211_disconnect(sdata); 7453 return; 7454 } 7455 7456 if (ttlm_info.switch_time) { 7457 u16 beacon_ts_tu, st_tu, delay; 7458 u64 delay_usec; 7459 u64 mask; 7460 7461 /* The t2l map switch time is indicated with a partial 7462 * TSF value (bits 10 to 25), get the partial beacon TS 7463 * as well, and calc the delay to the start time. 7464 */ 7465 mask = GENMASK_ULL(25, 10); 7466 beacon_ts_tu = (beacon_ts & mask) >> 10; 7467 st_tu = ttlm_info.switch_time; 7468 delay = st_tu - beacon_ts_tu; 7469 7470 /* 7471 * If the switch time is far in the future, then it 7472 * could also be the previous switch still being 7473 * announced. 7474 * We can simply ignore it for now, if it is a future 7475 * switch the AP will continue to announce it anyway. 7476 */ 7477 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7478 return; 7479 7480 delay_usec = ieee80211_tu_to_usec(delay); 7481 7482 /* Link switching can take time, so schedule it 7483 * 100ms before to be ready on time 7484 */ 7485 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7486 delay_usec -= 7487 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7488 else 7489 delay_usec = 0; 7490 7491 sdata->u.mgd.ttlm_info = ttlm_info; 7492 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7493 &sdata->u.mgd.ttlm_work); 7494 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7495 &sdata->u.mgd.ttlm_work, 7496 us_to_ktime(delay_usec)); 7497 return; 7498 } 7499 } 7500 } 7501 7502 static void 7503 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7504 int reporting_link_id, 7505 struct ieee802_11_elems *elems) 7506 { 7507 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7508 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7509 const struct element *sub; 7510 const u8 *subelems; 7511 size_t subelems_len; 7512 u8 common_size; 7513 int link_id; 7514 7515 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7516 return; 7517 7518 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7519 subelems = (u8 *)elems->ml_basic + common_size; 7520 subelems_len = elems->ml_basic_len - common_size; 7521 7522 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7523 subelems, subelems_len) { 7524 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7525 struct ieee80211_link_data *link; 7526 ssize_t len; 7527 7528 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7529 sub->datalen)) 7530 continue; 7531 7532 link_id = le16_get_bits(prof->control, 7533 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7534 /* need a valid link ID, but also not our own, both AP bugs */ 7535 if (link_id == reporting_link_id || 7536 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7537 continue; 7538 7539 link = sdata_dereference(sdata->link[link_id], sdata); 7540 if (!link) 7541 continue; 7542 7543 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7544 NULL, 0, 7545 IEEE80211_MLE_SUBELEM_FRAGMENT); 7546 if (WARN_ON(len < 0)) 7547 continue; 7548 7549 sta_profiles[link_id] = sub; 7550 sta_profiles_len[link_id] = len; 7551 } 7552 7553 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7554 struct ieee80211_mle_per_sta_profile *prof; 7555 struct ieee802_11_elems *prof_elems; 7556 struct ieee80211_link_data *link; 7557 ssize_t len; 7558 7559 if (link_id == reporting_link_id) 7560 continue; 7561 7562 link = sdata_dereference(sdata->link[link_id], sdata); 7563 if (!link) 7564 continue; 7565 7566 if (!sta_profiles[link_id]) { 7567 prof_elems = NULL; 7568 goto handle; 7569 } 7570 7571 /* we can defragment in-place, won't use the buffer again */ 7572 len = cfg80211_defragment_element(sta_profiles[link_id], 7573 subelems, subelems_len, 7574 (void *)sta_profiles[link_id], 7575 sta_profiles_len[link_id], 7576 IEEE80211_MLE_SUBELEM_FRAGMENT); 7577 if (WARN_ON(len != sta_profiles_len[link_id])) 7578 continue; 7579 7580 prof = (void *)sta_profiles[link_id]; 7581 prof_elems = ieee802_11_parse_elems(prof->variable + 7582 (prof->sta_info_len - 1), 7583 len - 7584 (prof->sta_info_len - 1), 7585 IEEE80211_FTYPE_MGMT | 7586 IEEE80211_STYPE_BEACON, 7587 NULL); 7588 7589 /* memory allocation failed - let's hope that's transient */ 7590 if (!prof_elems) 7591 continue; 7592 7593 handle: 7594 /* 7595 * FIXME: the timings here are obviously incorrect, 7596 * but only older Intel drivers seem to care, and 7597 * those don't have MLO. If you really need this, 7598 * the problem is having to calculate it with the 7599 * TSF offset etc. The device_timestamp is still 7600 * correct, of course. 7601 */ 7602 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7603 IEEE80211_CSA_SOURCE_OTHER_LINK); 7604 kfree(prof_elems); 7605 } 7606 } 7607 7608 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7609 const struct ieee802_11_elems *elems) 7610 { 7611 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7612 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7613 7614 if (!elems->ssid) 7615 return false; 7616 7617 /* hidden SSID: zero length */ 7618 if (elems->ssid_len == 0) 7619 return false; 7620 7621 if (elems->ssid_len != cfg->ssid_len) 7622 return true; 7623 7624 /* hidden SSID: zeroed out */ 7625 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7626 return false; 7627 7628 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7629 } 7630 7631 static bool 7632 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7633 struct ieee80211_mgmt *mgmt, 7634 struct ieee80211_rx_status *rx_status, 7635 struct ieee80211_chanctx_conf *chanctx) 7636 { 7637 u32 pri_2mhz_khz; 7638 struct ieee80211_channel *s1g_sibling_1mhz; 7639 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7640 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7641 7642 if (rx_khz == pri_khz) 7643 return true; 7644 7645 if (!chanctx->def.s1g_primary_2mhz) 7646 return false; 7647 7648 /* 7649 * If we have an S1G interface with a 2MHz primary, beacons are 7650 * sent on the center frequency of the 2MHz primary. Find the sibling 7651 * 1MHz channel and calculate the 2MHz primary center frequency. 7652 */ 7653 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7654 &chanctx->def); 7655 if (!s1g_sibling_1mhz) 7656 return false; 7657 7658 pri_2mhz_khz = 7659 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7660 return rx_khz == pri_2mhz_khz; 7661 } 7662 7663 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7664 struct ieee80211_hdr *hdr, size_t len, 7665 struct ieee80211_rx_status *rx_status) 7666 { 7667 struct ieee80211_sub_if_data *sdata = link->sdata; 7668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7669 struct ieee80211_bss_conf *bss_conf = link->conf; 7670 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7671 struct ieee80211_mgmt *mgmt = (void *) hdr; 7672 struct ieee80211_ext *ext = NULL; 7673 size_t baselen; 7674 struct ieee802_11_elems *elems; 7675 struct ieee80211_local *local = sdata->local; 7676 struct ieee80211_chanctx_conf *chanctx_conf; 7677 struct ieee80211_supported_band *sband; 7678 struct ieee80211_channel *chan; 7679 struct link_sta_info *link_sta; 7680 struct sta_info *sta; 7681 u64 changed = 0; 7682 bool erp_valid; 7683 u8 erp_value = 0; 7684 u32 ncrc = 0; 7685 u8 *bssid, *variable = mgmt->u.beacon.variable; 7686 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7687 struct ieee80211_elems_parse_params parse_params = { 7688 .mode = link->u.mgd.conn.mode, 7689 .link_id = -1, 7690 .from_ap = true, 7691 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7692 }; 7693 7694 lockdep_assert_wiphy(local->hw.wiphy); 7695 7696 /* Process beacon from the current BSS */ 7697 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7698 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7699 ext = (void *)mgmt; 7700 variable = ext->u.s1g_beacon.variable + 7701 ieee80211_s1g_optional_len(ext->frame_control); 7702 } 7703 7704 baselen = (u8 *) variable - (u8 *) mgmt; 7705 if (baselen > len) 7706 return; 7707 7708 parse_params.start = variable; 7709 parse_params.len = len - baselen; 7710 7711 rcu_read_lock(); 7712 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7713 if (!chanctx_conf) { 7714 rcu_read_unlock(); 7715 return; 7716 } 7717 7718 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7719 chanctx_conf)) { 7720 rcu_read_unlock(); 7721 return; 7722 } 7723 chan = chanctx_conf->def.chan; 7724 rcu_read_unlock(); 7725 7726 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7727 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7728 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7729 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7730 elems = ieee802_11_parse_elems_full(&parse_params); 7731 if (!elems) 7732 return; 7733 7734 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7735 7736 if (elems->dtim_period) 7737 link->u.mgd.dtim_period = elems->dtim_period; 7738 link->u.mgd.have_beacon = true; 7739 ifmgd->assoc_data->need_beacon = false; 7740 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7741 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7742 bss_conf->sync_tsf = 7743 le64_to_cpu(mgmt->u.beacon.timestamp); 7744 bss_conf->sync_device_ts = 7745 rx_status->device_timestamp; 7746 bss_conf->sync_dtim_count = elems->dtim_count; 7747 } 7748 7749 if (elems->mbssid_config_ie) 7750 bss_conf->profile_periodicity = 7751 elems->mbssid_config_ie->profile_periodicity; 7752 else 7753 bss_conf->profile_periodicity = 0; 7754 7755 if (elems->ext_capab_len >= 11 && 7756 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7757 bss_conf->ema_ap = true; 7758 else 7759 bss_conf->ema_ap = false; 7760 7761 /* continue assoc process */ 7762 ifmgd->assoc_data->timeout = jiffies; 7763 ifmgd->assoc_data->timeout_started = true; 7764 run_again(sdata, ifmgd->assoc_data->timeout); 7765 kfree(elems); 7766 return; 7767 } 7768 7769 if (!ifmgd->associated || 7770 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7771 return; 7772 bssid = link->u.mgd.bssid; 7773 7774 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7775 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7776 local, rx_status); 7777 7778 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7779 mlme_dbg_ratelimited(sdata, 7780 "cancelling AP probe due to a received beacon\n"); 7781 ieee80211_reset_ap_probe(sdata); 7782 } 7783 7784 /* 7785 * Push the beacon loss detection into the future since 7786 * we are processing a beacon from the AP just now. 7787 */ 7788 ieee80211_sta_reset_beacon_monitor(sdata); 7789 7790 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7791 * element (which carries the beacon interval). Don't forget to add a 7792 * bit to care_about_ies[] above if mac80211 is interested in a 7793 * changing S1G element. 7794 */ 7795 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7796 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7797 parse_params.bss = bss_conf->bss; 7798 parse_params.filter = care_about_ies; 7799 parse_params.crc = ncrc; 7800 elems = ieee802_11_parse_elems_full(&parse_params); 7801 if (!elems) 7802 return; 7803 7804 if (rx_status->flag & RX_FLAG_DECRYPTED && 7805 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7806 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7807 sdata->vif.cfg.ap_addr); 7808 __ieee80211_disconnect(sdata); 7809 return; 7810 } 7811 7812 ncrc = elems->crc; 7813 7814 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7815 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7816 vif_cfg->s1g)) { 7817 if (local->hw.conf.dynamic_ps_timeout > 0) { 7818 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7819 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7820 ieee80211_hw_config(local, -1, 7821 IEEE80211_CONF_CHANGE_PS); 7822 } 7823 ieee80211_send_nullfunc(local, sdata, false); 7824 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7825 local->pspolling = true; 7826 7827 /* 7828 * Here is assumed that the driver will be 7829 * able to send ps-poll frame and receive a 7830 * response even though power save mode is 7831 * enabled, but some drivers might require 7832 * to disable power save here. This needs 7833 * to be investigated. 7834 */ 7835 ieee80211_send_pspoll(local, sdata); 7836 } 7837 } 7838 7839 if (sdata->vif.p2p || 7840 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7841 struct ieee80211_p2p_noa_attr noa = {}; 7842 int ret; 7843 7844 ret = cfg80211_get_p2p_attr(variable, 7845 len - baselen, 7846 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7847 (u8 *) &noa, sizeof(noa)); 7848 if (ret >= 2) { 7849 if (link->u.mgd.p2p_noa_index != noa.index) { 7850 /* valid noa_attr and index changed */ 7851 link->u.mgd.p2p_noa_index = noa.index; 7852 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7853 changed |= BSS_CHANGED_P2P_PS; 7854 /* 7855 * make sure we update all information, the CRC 7856 * mechanism doesn't look at P2P attributes. 7857 */ 7858 link->u.mgd.beacon_crc_valid = false; 7859 } 7860 } else if (link->u.mgd.p2p_noa_index != -1) { 7861 /* noa_attr not found and we had valid noa_attr before */ 7862 link->u.mgd.p2p_noa_index = -1; 7863 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7864 changed |= BSS_CHANGED_P2P_PS; 7865 link->u.mgd.beacon_crc_valid = false; 7866 } 7867 } 7868 7869 /* 7870 * Update beacon timing and dtim count on every beacon appearance. This 7871 * will allow the driver to use the most updated values. Do it before 7872 * comparing this one with last received beacon. 7873 * IMPORTANT: These parameters would possibly be out of sync by the time 7874 * the driver will use them. The synchronized view is currently 7875 * guaranteed only in certain callbacks. 7876 */ 7877 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7878 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7879 bss_conf->sync_tsf = 7880 le64_to_cpu(mgmt->u.beacon.timestamp); 7881 bss_conf->sync_device_ts = 7882 rx_status->device_timestamp; 7883 bss_conf->sync_dtim_count = elems->dtim_count; 7884 } 7885 7886 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7887 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7888 parse_params.start, 7889 parse_params.len))) 7890 goto free; 7891 link->u.mgd.beacon_crc = ncrc; 7892 link->u.mgd.beacon_crc_valid = true; 7893 7894 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7895 7896 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7897 rx_status->device_timestamp, 7898 elems, elems, 7899 IEEE80211_CSA_SOURCE_BEACON); 7900 7901 /* note that after this elems->ml_basic can no longer be used fully */ 7902 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7903 7904 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7905 7906 if (!sdata->u.mgd.epcs.enabled && 7907 !link->u.mgd.disable_wmm_tracking && 7908 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7909 elems->wmm_param_len, 7910 elems->mu_edca_param_set)) 7911 changed |= BSS_CHANGED_QOS; 7912 7913 /* 7914 * If we haven't had a beacon before, tell the driver about the 7915 * DTIM period (and beacon timing if desired) now. 7916 */ 7917 if (!link->u.mgd.have_beacon) { 7918 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7919 bss_conf->dtim_period = elems->dtim_period ?: 1; 7920 7921 changed |= BSS_CHANGED_BEACON_INFO; 7922 link->u.mgd.have_beacon = true; 7923 7924 ieee80211_recalc_ps(local); 7925 7926 ieee80211_recalc_ps_vif(sdata); 7927 } 7928 7929 if (elems->erp_info) { 7930 erp_valid = true; 7931 erp_value = elems->erp_info[0]; 7932 } else { 7933 erp_valid = false; 7934 } 7935 7936 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7937 changed |= ieee80211_handle_bss_capability(link, 7938 le16_to_cpu(mgmt->u.beacon.capab_info), 7939 erp_valid, erp_value); 7940 7941 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7942 if (WARN_ON(!sta)) { 7943 goto free; 7944 } 7945 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7946 lockdep_is_held(&local->hw.wiphy->mtx)); 7947 if (WARN_ON(!link_sta)) { 7948 goto free; 7949 } 7950 7951 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7952 goto free; 7953 7954 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7955 7956 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7957 7958 if (ieee80211_config_bw(link, elems, true, &changed, 7959 IEEE80211_STYPE_BEACON)) { 7960 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7961 WLAN_REASON_DEAUTH_LEAVING, 7962 true, deauth_buf); 7963 ieee80211_report_disconnect(sdata, deauth_buf, 7964 sizeof(deauth_buf), true, 7965 WLAN_REASON_DEAUTH_LEAVING, 7966 false); 7967 goto free; 7968 } 7969 7970 if (elems->opmode_notif) 7971 ieee80211_vht_handle_opmode(sdata, link_sta, 7972 *elems->opmode_notif, 7973 rx_status->band); 7974 7975 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7976 elems->country_elem, 7977 elems->country_elem_len, 7978 elems->pwr_constr_elem, 7979 elems->cisco_dtpc_elem); 7980 7981 ieee80211_ml_reconfiguration(sdata, elems); 7982 ieee80211_process_adv_ttlm(sdata, elems, 7983 le64_to_cpu(mgmt->u.beacon.timestamp)); 7984 7985 ieee80211_link_info_change_notify(sdata, link, changed); 7986 free: 7987 kfree(elems); 7988 } 7989 7990 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7991 struct ieee80211_neg_ttlm neg_ttlm) 7992 { 7993 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7994 u8 i; 7995 7996 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7997 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7998 7999 /* If there is an active TTLM, unset previously suspended links */ 8000 if (sdata->vif.neg_ttlm.valid) 8001 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 8002 8003 /* exclude links that are already disabled by advertised TTLM */ 8004 new_active_links = 8005 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 8006 new_suspended_links = 8007 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 8008 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 8009 if (ieee80211_ttlm_set_links(sdata, new_active_links, 8010 new_dormant_links, new_suspended_links)) 8011 return; 8012 8013 sdata->vif.neg_ttlm = neg_ttlm; 8014 sdata->vif.neg_ttlm.valid = true; 8015 } 8016 8017 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 8018 struct wiphy_work *work) 8019 { 8020 struct ieee80211_sub_if_data *sdata = 8021 container_of(work, struct ieee80211_sub_if_data, 8022 u.mgd.neg_ttlm_timeout_work.work); 8023 8024 sdata_info(sdata, 8025 "No negotiated TTLM response from AP, disconnecting.\n"); 8026 8027 __ieee80211_disconnect(sdata); 8028 } 8029 8030 static void 8031 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 8032 struct ieee80211_neg_ttlm *neg_ttlm) 8033 { 8034 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 8035 8036 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 8037 sizeof(neg_ttlm->downlink))) { 8038 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 8039 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 8040 } else { 8041 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 8042 } 8043 8044 for (i = 0; i < ARRAY_SIZE(direction); i++) { 8045 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 8046 __le16 map; 8047 8048 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 8049 8050 pos = skb_put(skb, len + 2); 8051 *pos++ = WLAN_EID_EXTENSION; 8052 len_pos = pos++; 8053 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 8054 *pos++ = direction[i]; 8055 map_ind_pos = pos++; 8056 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8057 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 8058 cpu_to_le16(neg_ttlm->uplink[tid]) : 8059 cpu_to_le16(neg_ttlm->downlink[tid]); 8060 if (!map) 8061 continue; 8062 8063 len += 2; 8064 map_ind |= BIT(tid); 8065 skb_put_data(skb, &map, sizeof(map)); 8066 } 8067 8068 *map_ind_pos = map_ind; 8069 *len_pos = len; 8070 8071 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 8072 break; 8073 } 8074 } 8075 8076 static void 8077 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 8078 struct ieee80211_neg_ttlm *neg_ttlm, 8079 u8 dialog_token) 8080 { 8081 struct ieee80211_local *local = sdata->local; 8082 struct ieee80211_mgmt *mgmt; 8083 struct sk_buff *skb; 8084 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_req); 8085 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8086 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8087 8088 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8089 if (!skb) 8090 return; 8091 8092 skb_reserve(skb, local->tx_headroom); 8093 mgmt = skb_put_zero(skb, hdr_len); 8094 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8095 IEEE80211_STYPE_ACTION); 8096 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8097 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8098 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8099 8100 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8101 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 8102 mgmt->u.action.ttlm_req.dialog_token = dialog_token; 8103 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8104 ieee80211_tx_skb(sdata, skb); 8105 } 8106 8107 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8108 struct cfg80211_ttlm_params *params) 8109 { 8110 struct ieee80211_neg_ttlm neg_ttlm = {}; 8111 u8 i; 8112 8113 if (!ieee80211_vif_is_mld(&sdata->vif) || 8114 !(sdata->vif.cfg.mld_capa_op & 8115 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 8116 return -EINVAL; 8117 8118 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8119 if ((params->dlink[i] & ~sdata->vif.valid_links) || 8120 (params->ulink[i] & ~sdata->vif.valid_links)) 8121 return -EINVAL; 8122 8123 neg_ttlm.downlink[i] = params->dlink[i]; 8124 neg_ttlm.uplink[i] = params->ulink[i]; 8125 } 8126 8127 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 8128 NEG_TTLM_RES_ACCEPT) 8129 return -EINVAL; 8130 8131 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8132 sdata->u.mgd.dialog_token_alloc++; 8133 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 8134 sdata->u.mgd.dialog_token_alloc); 8135 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8136 &sdata->u.mgd.neg_ttlm_timeout_work); 8137 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 8138 &sdata->u.mgd.neg_ttlm_timeout_work, 8139 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 8140 return 0; 8141 } 8142 8143 static void 8144 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8145 enum ieee80211_neg_ttlm_res ttlm_res, 8146 u8 dialog_token, 8147 struct ieee80211_neg_ttlm *neg_ttlm) 8148 { 8149 struct ieee80211_local *local = sdata->local; 8150 struct ieee80211_mgmt *mgmt; 8151 struct sk_buff *skb; 8152 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_res); 8153 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8154 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8155 u16 status_code; 8156 8157 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8158 if (!skb) 8159 return; 8160 8161 skb_reserve(skb, local->tx_headroom); 8162 mgmt = skb_put_zero(skb, hdr_len); 8163 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8164 IEEE80211_STYPE_ACTION); 8165 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8166 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8167 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8168 8169 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8170 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 8171 mgmt->u.action.ttlm_res.dialog_token = dialog_token; 8172 switch (ttlm_res) { 8173 default: 8174 WARN_ON(1); 8175 fallthrough; 8176 case NEG_TTLM_RES_REJECT: 8177 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 8178 break; 8179 case NEG_TTLM_RES_ACCEPT: 8180 status_code = WLAN_STATUS_SUCCESS; 8181 break; 8182 case NEG_TTLM_RES_SUGGEST_PREFERRED: 8183 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 8184 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8185 break; 8186 } 8187 8188 mgmt->u.action.ttlm_res.status_code = cpu_to_le16(status_code); 8189 ieee80211_tx_skb(sdata, skb); 8190 } 8191 8192 static int 8193 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8194 const struct ieee80211_ttlm_elem *ttlm, 8195 struct ieee80211_neg_ttlm *neg_ttlm, 8196 u8 *direction) 8197 { 8198 u8 control, link_map_presence, map_size, tid; 8199 u8 *pos; 8200 8201 /* The element size was already validated in 8202 * ieee80211_tid_to_link_map_size_ok() 8203 */ 8204 pos = (void *)ttlm->optional; 8205 8206 control = ttlm->control; 8207 8208 /* mapping switch time and expected duration fields are not expected 8209 * in case of negotiated TTLM 8210 */ 8211 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 8212 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 8213 mlme_dbg(sdata, 8214 "Invalid TTLM element in negotiated TTLM request\n"); 8215 return -EINVAL; 8216 } 8217 8218 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 8219 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8220 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 8221 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 8222 } 8223 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 8224 return 0; 8225 } 8226 8227 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 8228 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 8229 *direction != IEEE80211_TTLM_DIRECTION_UP && 8230 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 8231 return -EINVAL; 8232 8233 link_map_presence = *pos; 8234 pos++; 8235 8236 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 8237 map_size = 1; 8238 else 8239 map_size = 2; 8240 8241 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8242 u16 map; 8243 8244 if (link_map_presence & BIT(tid)) { 8245 map = ieee80211_get_ttlm(map_size, pos); 8246 if (!map) { 8247 mlme_dbg(sdata, 8248 "No active links for TID %d", tid); 8249 return -EINVAL; 8250 } 8251 pos += map_size; 8252 } else { 8253 map = 0; 8254 } 8255 8256 switch (*direction) { 8257 case IEEE80211_TTLM_DIRECTION_BOTH: 8258 neg_ttlm->downlink[tid] = map; 8259 neg_ttlm->uplink[tid] = map; 8260 break; 8261 case IEEE80211_TTLM_DIRECTION_DOWN: 8262 neg_ttlm->downlink[tid] = map; 8263 break; 8264 case IEEE80211_TTLM_DIRECTION_UP: 8265 neg_ttlm->uplink[tid] = map; 8266 break; 8267 default: 8268 return -EINVAL; 8269 } 8270 } 8271 return 0; 8272 } 8273 8274 static void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 8275 struct ieee80211_mgmt *mgmt, 8276 size_t len) 8277 { 8278 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 8279 size_t ies_len; 8280 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 8281 struct ieee802_11_elems *elems = NULL; 8282 struct ieee80211_neg_ttlm neg_ttlm = {}; 8283 8284 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 8285 8286 if (!ieee80211_vif_is_mld(&sdata->vif)) 8287 return; 8288 8289 dialog_token = mgmt->u.action.ttlm_req.dialog_token; 8290 ies_len = len - IEEE80211_MIN_ACTION_SIZE(ttlm_req); 8291 elems = ieee802_11_parse_elems(mgmt->u.action.ttlm_req.variable, 8292 ies_len, 8293 IEEE80211_FTYPE_MGMT | 8294 IEEE80211_STYPE_ACTION, 8295 NULL); 8296 if (!elems) { 8297 ttlm_res = NEG_TTLM_RES_REJECT; 8298 goto out; 8299 } 8300 8301 for (i = 0; i < elems->ttlm_num; i++) { 8302 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 8303 &neg_ttlm, &direction[i]) || 8304 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 8305 elems->ttlm_num != 1)) { 8306 ttlm_res = NEG_TTLM_RES_REJECT; 8307 goto out; 8308 } 8309 } 8310 8311 if (!elems->ttlm_num || 8312 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 8313 ttlm_res = NEG_TTLM_RES_REJECT; 8314 goto out; 8315 } 8316 8317 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8318 if ((neg_ttlm.downlink[i] && 8319 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 8320 (neg_ttlm.uplink[i] && 8321 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 8322 ttlm_res = NEG_TTLM_RES_REJECT; 8323 goto out; 8324 } 8325 } 8326 8327 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8328 8329 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8330 goto out; 8331 8332 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8333 out: 8334 kfree(elems); 8335 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8336 } 8337 8338 static void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8339 struct ieee80211_mgmt *mgmt, 8340 size_t len) 8341 { 8342 if (!ieee80211_vif_is_mld(&sdata->vif) || 8343 mgmt->u.action.ttlm_res.dialog_token != sdata->u.mgd.dialog_token_alloc) 8344 return; 8345 8346 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8347 &sdata->u.mgd.neg_ttlm_timeout_work); 8348 8349 /* MLD station sends a TID to link mapping request, mainly to handle 8350 * BTM (BSS transition management) request, in which case it needs to 8351 * restrict the active links set. 8352 * In this case it's not expected that the MLD AP will reject the 8353 * negotiated TTLM request. 8354 * This can be better implemented in the future, to handle request 8355 * rejections. 8356 */ 8357 if (le16_to_cpu(mgmt->u.action.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8358 __ieee80211_disconnect(sdata); 8359 } 8360 8361 static void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8362 { 8363 u16 new_dormant_links; 8364 8365 if (!sdata->vif.neg_ttlm.valid) 8366 return; 8367 8368 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8369 new_dormant_links = 8370 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8371 sdata->vif.suspended_links = 0; 8372 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8373 new_dormant_links); 8374 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8375 BSS_CHANGED_MLD_VALID_LINKS); 8376 } 8377 8378 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8379 struct wiphy_work *work) 8380 { 8381 struct ieee80211_sub_if_data *sdata = 8382 container_of(work, struct ieee80211_sub_if_data, 8383 u.mgd.teardown_ttlm_work); 8384 8385 ieee80211_process_ttlm_teardown(sdata); 8386 } 8387 8388 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8389 { 8390 int frame_len = IEEE80211_MIN_ACTION_SIZE(ttlm_tear_down); 8391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8392 struct ieee80211_local *local = sdata->local; 8393 struct ieee80211_mgmt *mgmt; 8394 struct sk_buff *skb; 8395 struct ieee80211_tx_info *info; 8396 8397 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8398 if (!skb) 8399 return; 8400 8401 skb_reserve(skb, local->hw.extra_tx_headroom); 8402 mgmt = skb_put_zero(skb, frame_len); 8403 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8404 IEEE80211_STYPE_ACTION); 8405 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8406 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8407 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8408 8409 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8410 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8411 8412 info = IEEE80211_SKB_CB(skb); 8413 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8414 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8415 ieee80211_tx_skb(sdata, skb); 8416 } 8417 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8418 8419 static void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8420 struct sk_buff *skb) 8421 { 8422 struct ieee80211_link_data *link = &sdata->deflink; 8423 struct ieee80211_rx_status *rx_status; 8424 struct ieee80211_hdr *hdr; 8425 u16 fc; 8426 8427 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8428 8429 rx_status = (struct ieee80211_rx_status *) skb->cb; 8430 hdr = (struct ieee80211_hdr *) skb->data; 8431 fc = le16_to_cpu(hdr->frame_control); 8432 8433 switch (fc & IEEE80211_FCTL_STYPE) { 8434 case IEEE80211_STYPE_S1G_BEACON: 8435 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8436 break; 8437 } 8438 } 8439 8440 static void ieee80211_sta_timer(struct timer_list *t) 8441 { 8442 struct ieee80211_sub_if_data *sdata = 8443 timer_container_of(sdata, t, u.mgd.timer); 8444 8445 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8446 } 8447 8448 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8449 u8 reason, bool tx) 8450 { 8451 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8452 8453 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8454 tx, frame_buf); 8455 8456 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8457 reason, false); 8458 } 8459 8460 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8461 { 8462 struct ieee80211_local *local = sdata->local; 8463 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8464 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8465 u32 tx_flags = 0; 8466 u16 trans = 1; 8467 u16 status = 0; 8468 struct ieee80211_prep_tx_info info = { 8469 .subtype = IEEE80211_STYPE_AUTH, 8470 }; 8471 8472 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8473 8474 if (WARN_ON_ONCE(!auth_data)) 8475 return -EINVAL; 8476 8477 if (auth_data->algorithm == WLAN_AUTH_EPPKE && 8478 ieee80211_vif_is_mld(&sdata->vif) && 8479 !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 8480 auth_data->data, auth_data->data_len)) 8481 return -EINVAL; 8482 8483 auth_data->tries++; 8484 8485 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8486 sdata_info(sdata, "authentication with %pM timed out\n", 8487 auth_data->ap_addr); 8488 8489 /* 8490 * Most likely AP is not in the range so remove the 8491 * bss struct for that AP. 8492 */ 8493 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8494 8495 return -ETIMEDOUT; 8496 } 8497 8498 if (auth_data->algorithm == WLAN_AUTH_SAE || 8499 auth_data->algorithm == WLAN_AUTH_EPPKE) 8500 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8501 8502 info.link_id = auth_data->link_id; 8503 drv_mgd_prepare_tx(local, sdata, &info); 8504 8505 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8506 auth_data->ap_addr, auth_data->tries, 8507 IEEE80211_AUTH_MAX_TRIES); 8508 8509 auth_data->expected_transaction = 2; 8510 8511 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8512 trans = auth_data->trans; 8513 status = auth_data->status; 8514 auth_data->expected_transaction = trans; 8515 } else if (auth_data->algorithm == WLAN_AUTH_EPPKE) { 8516 trans = auth_data->trans; 8517 status = auth_data->status; 8518 } else if (auth_data->algorithm == WLAN_AUTH_IEEE8021X) { 8519 trans = auth_data->trans; 8520 status = auth_data->status; 8521 auth_data->expected_transaction = trans + 1; 8522 } 8523 8524 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8525 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8526 IEEE80211_TX_INTFL_MLME_CONN_TX; 8527 8528 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8529 auth_data->data, auth_data->data_len, 8530 auth_data->ap_addr, auth_data->ap_addr, 8531 NULL, 0, 0, tx_flags); 8532 8533 if (tx_flags == 0) { 8534 if (auth_data->algorithm == WLAN_AUTH_SAE) 8535 auth_data->timeout = jiffies + 8536 IEEE80211_AUTH_TIMEOUT_SAE; 8537 else 8538 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8539 } else { 8540 auth_data->timeout = 8541 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8542 } 8543 8544 auth_data->timeout_started = true; 8545 run_again(sdata, auth_data->timeout); 8546 8547 return 0; 8548 } 8549 8550 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8551 { 8552 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8553 struct ieee80211_local *local = sdata->local; 8554 int ret; 8555 8556 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8557 8558 assoc_data->tries++; 8559 assoc_data->comeback = false; 8560 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8561 sdata_info(sdata, "association with %pM timed out\n", 8562 assoc_data->ap_addr); 8563 8564 /* 8565 * Most likely AP is not in the range so remove the 8566 * bss struct for that AP. 8567 */ 8568 cfg80211_unlink_bss(local->hw.wiphy, 8569 assoc_data->link[assoc_data->assoc_link_id].bss); 8570 8571 return -ETIMEDOUT; 8572 } 8573 8574 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8575 assoc_data->ap_addr, assoc_data->tries, 8576 IEEE80211_ASSOC_MAX_TRIES); 8577 ret = ieee80211_send_assoc(sdata); 8578 if (ret) 8579 return ret; 8580 8581 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8582 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8583 assoc_data->timeout_started = true; 8584 run_again(sdata, assoc_data->timeout); 8585 } else { 8586 assoc_data->timeout = 8587 round_jiffies_up(jiffies + 8588 IEEE80211_ASSOC_TIMEOUT_LONG); 8589 assoc_data->timeout_started = true; 8590 run_again(sdata, assoc_data->timeout); 8591 } 8592 8593 return 0; 8594 } 8595 8596 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8597 __le16 fc, bool acked) 8598 { 8599 struct ieee80211_local *local = sdata->local; 8600 8601 sdata->u.mgd.status_fc = fc; 8602 sdata->u.mgd.status_acked = acked; 8603 sdata->u.mgd.status_received = true; 8604 8605 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8606 } 8607 8608 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8609 { 8610 struct ieee80211_local *local = sdata->local; 8611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8612 8613 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8614 8615 if (ifmgd->status_received) { 8616 __le16 fc = ifmgd->status_fc; 8617 bool status_acked = ifmgd->status_acked; 8618 8619 ifmgd->status_received = false; 8620 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8621 if (status_acked) { 8622 if (ifmgd->auth_data->algorithm == 8623 WLAN_AUTH_SAE) 8624 ifmgd->auth_data->timeout = 8625 jiffies + 8626 IEEE80211_AUTH_TIMEOUT_SAE; 8627 else 8628 ifmgd->auth_data->timeout = 8629 jiffies + 8630 IEEE80211_AUTH_TIMEOUT_SHORT; 8631 run_again(sdata, ifmgd->auth_data->timeout); 8632 } else { 8633 ifmgd->auth_data->timeout = jiffies - 1; 8634 } 8635 ifmgd->auth_data->timeout_started = true; 8636 } else if (ifmgd->assoc_data && 8637 !ifmgd->assoc_data->comeback && 8638 (ieee80211_is_assoc_req(fc) || 8639 ieee80211_is_reassoc_req(fc))) { 8640 /* 8641 * Update association timeout based on the TX status 8642 * for the (Re)Association Request frame. Skip this if 8643 * we have already processed a (Re)Association Response 8644 * frame that indicated need for association comeback 8645 * at a specific time in the future. This could happen 8646 * if the TX status information is delayed enough for 8647 * the response to be received and processed first. 8648 */ 8649 if (status_acked) { 8650 ifmgd->assoc_data->timeout = 8651 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8652 run_again(sdata, ifmgd->assoc_data->timeout); 8653 } else { 8654 ifmgd->assoc_data->timeout = jiffies - 1; 8655 } 8656 ifmgd->assoc_data->timeout_started = true; 8657 } 8658 } 8659 8660 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8661 time_after(jiffies, ifmgd->auth_data->timeout)) { 8662 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8663 /* 8664 * ok ... we waited for assoc or continuation but 8665 * userspace didn't do it, so kill the auth data 8666 */ 8667 ieee80211_destroy_auth_data(sdata, false); 8668 } else if (ieee80211_auth(sdata)) { 8669 u8 ap_addr[ETH_ALEN]; 8670 struct ieee80211_event event = { 8671 .type = MLME_EVENT, 8672 .u.mlme.data = AUTH_EVENT, 8673 .u.mlme.status = MLME_TIMEOUT, 8674 }; 8675 8676 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8677 8678 ieee80211_destroy_auth_data(sdata, false); 8679 8680 cfg80211_auth_timeout(sdata->dev, ap_addr); 8681 drv_event_callback(sdata->local, sdata, &event); 8682 } 8683 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8684 run_again(sdata, ifmgd->auth_data->timeout); 8685 8686 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8687 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8688 if ((ifmgd->assoc_data->need_beacon && 8689 !sdata->deflink.u.mgd.have_beacon) || 8690 ieee80211_do_assoc(sdata)) { 8691 struct ieee80211_event event = { 8692 .type = MLME_EVENT, 8693 .u.mlme.data = ASSOC_EVENT, 8694 .u.mlme.status = MLME_TIMEOUT, 8695 }; 8696 8697 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8698 drv_event_callback(sdata->local, sdata, &event); 8699 } 8700 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8701 run_again(sdata, ifmgd->assoc_data->timeout); 8702 8703 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8704 ifmgd->associated) { 8705 u8 *bssid = sdata->deflink.u.mgd.bssid; 8706 int max_tries; 8707 8708 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8709 max_tries = max_nullfunc_tries; 8710 else 8711 max_tries = max_probe_tries; 8712 8713 /* ACK received for nullfunc probing frame */ 8714 if (!ifmgd->probe_send_count) 8715 ieee80211_reset_ap_probe(sdata); 8716 else if (ifmgd->nullfunc_failed) { 8717 if (ifmgd->probe_send_count < max_tries) { 8718 mlme_dbg(sdata, 8719 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8720 bssid, ifmgd->probe_send_count, 8721 max_tries); 8722 ieee80211_mgd_probe_ap_send(sdata); 8723 } else { 8724 mlme_dbg(sdata, 8725 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8726 bssid); 8727 ieee80211_sta_connection_lost(sdata, 8728 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8729 false); 8730 } 8731 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8732 run_again(sdata, ifmgd->probe_timeout); 8733 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8734 mlme_dbg(sdata, 8735 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8736 bssid, probe_wait_ms); 8737 ieee80211_sta_connection_lost(sdata, 8738 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8739 } else if (ifmgd->probe_send_count < max_tries) { 8740 mlme_dbg(sdata, 8741 "No probe response from AP %pM after %dms, try %d/%i\n", 8742 bssid, probe_wait_ms, 8743 ifmgd->probe_send_count, max_tries); 8744 ieee80211_mgd_probe_ap_send(sdata); 8745 } else { 8746 /* 8747 * We actually lost the connection ... or did we? 8748 * Let's make sure! 8749 */ 8750 mlme_dbg(sdata, 8751 "No probe response from AP %pM after %dms, disconnecting.\n", 8752 bssid, probe_wait_ms); 8753 8754 ieee80211_sta_connection_lost(sdata, 8755 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8756 } 8757 } 8758 } 8759 8760 static bool 8761 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8762 { 8763 /* 8764 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8765 * the links. 8766 */ 8767 struct ieee80211_link_data *link; 8768 8769 guard(rcu)(); 8770 8771 for_each_link_data_rcu(sdata, link) { 8772 if (!(link->conf->csa_active && 8773 !link->u.mgd.csa.waiting_bcn)) 8774 return false; 8775 } 8776 8777 return true; 8778 } 8779 8780 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8781 { 8782 struct ieee80211_sub_if_data *sdata = 8783 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8784 8785 if (ieee80211_is_csa_in_progress(sdata)) 8786 return; 8787 8788 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8789 return; 8790 8791 sdata->u.mgd.connection_loss = false; 8792 wiphy_work_queue(sdata->local->hw.wiphy, 8793 &sdata->u.mgd.beacon_connection_loss_work); 8794 } 8795 8796 static unsigned long 8797 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8798 { 8799 unsigned long latest_timeout = jiffies; 8800 unsigned int link_id; 8801 struct sta_info *sta; 8802 8803 guard(rcu)(); 8804 8805 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8806 if (!sta) 8807 return 0; 8808 8809 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8810 link_id++) { 8811 struct link_sta_info *link_sta; 8812 unsigned long timeout; 8813 8814 link_sta = rcu_dereference(sta->link[link_id]); 8815 if (!link_sta) 8816 continue; 8817 8818 timeout = link_sta->status_stats.last_ack; 8819 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8820 timeout = link_sta->rx_stats.last_rx; 8821 8822 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8823 8824 /* 8825 * latest_timeout holds the timeout of the link 8826 * that will expire last among all links in an 8827 * non-AP MLD STA. This ensures that the connection 8828 * monitor timer is only reset if at least one link 8829 * is still active, and it is scheduled to fire at 8830 * the latest possible timeout. 8831 */ 8832 if (time_after(timeout, latest_timeout)) 8833 latest_timeout = timeout; 8834 } 8835 8836 return latest_timeout; 8837 } 8838 8839 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8840 { 8841 struct ieee80211_sub_if_data *sdata = 8842 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8843 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8844 struct ieee80211_local *local = sdata->local; 8845 unsigned long latest_timeout; 8846 8847 if (ieee80211_is_csa_in_progress(sdata)) 8848 return; 8849 8850 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8851 8852 /* 8853 * If latest timeout is after now, then update timer to fire at 8854 * the later date, but do not actually probe at this time. 8855 */ 8856 if (time_is_after_jiffies(latest_timeout)) { 8857 mod_timer(&ifmgd->conn_mon_timer, 8858 round_jiffies_up(latest_timeout)); 8859 return; 8860 } 8861 8862 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8863 } 8864 8865 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8866 struct wiphy_work *work) 8867 { 8868 struct ieee80211_sub_if_data *sdata = 8869 container_of(work, struct ieee80211_sub_if_data, 8870 u.mgd.monitor_work); 8871 8872 ieee80211_mgd_probe_ap(sdata, false); 8873 } 8874 8875 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8876 { 8877 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8878 __ieee80211_stop_poll(sdata); 8879 8880 /* let's probe the connection once */ 8881 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8882 wiphy_work_queue(sdata->local->hw.wiphy, 8883 &sdata->u.mgd.monitor_work); 8884 } 8885 } 8886 8887 #ifdef CONFIG_PM 8888 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8889 { 8890 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8891 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8892 8893 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8894 8895 if (ifmgd->auth_data || ifmgd->assoc_data) { 8896 const u8 *ap_addr = ifmgd->auth_data ? 8897 ifmgd->auth_data->ap_addr : 8898 ifmgd->assoc_data->ap_addr; 8899 8900 /* 8901 * If we are trying to authenticate / associate while suspending, 8902 * cfg80211 won't know and won't actually abort those attempts, 8903 * thus we need to do that ourselves. 8904 */ 8905 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8906 IEEE80211_STYPE_DEAUTH, 8907 WLAN_REASON_DEAUTH_LEAVING, 8908 false, frame_buf); 8909 if (ifmgd->assoc_data) 8910 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8911 if (ifmgd->auth_data) 8912 ieee80211_destroy_auth_data(sdata, false); 8913 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8914 IEEE80211_DEAUTH_FRAME_LEN, 8915 false); 8916 } 8917 8918 /* This is a bit of a hack - we should find a better and more generic 8919 * solution to this. Normally when suspending, cfg80211 will in fact 8920 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8921 * auth (not so important) or assoc (this is the problem) process. 8922 * 8923 * As a consequence, it can happen that we are in the process of both 8924 * associating and suspending, and receive an association response 8925 * after cfg80211 has checked if it needs to disconnect, but before 8926 * we actually set the flag to drop incoming frames. This will then 8927 * cause the workqueue flush to process the association response in 8928 * the suspend, resulting in a successful association just before it 8929 * tries to remove the interface from the driver, which now though 8930 * has a channel context assigned ... this results in issues. 8931 * 8932 * To work around this (for now) simply deauth here again if we're 8933 * now connected. 8934 */ 8935 if (ifmgd->associated && !sdata->local->wowlan) { 8936 u8 bssid[ETH_ALEN]; 8937 struct cfg80211_deauth_request req = { 8938 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8939 .bssid = bssid, 8940 }; 8941 8942 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8943 ieee80211_mgd_deauth(sdata, &req); 8944 } 8945 } 8946 #endif 8947 8948 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8949 { 8950 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8951 8952 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8953 8954 if (!ifmgd->associated) 8955 return; 8956 8957 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8958 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8959 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8960 ieee80211_sta_connection_lost(sdata, 8961 WLAN_REASON_UNSPECIFIED, 8962 true); 8963 return; 8964 } 8965 8966 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8967 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8968 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8969 ieee80211_sta_connection_lost(sdata, 8970 WLAN_REASON_UNSPECIFIED, 8971 true); 8972 return; 8973 } 8974 } 8975 8976 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8977 struct wiphy_work *work) 8978 { 8979 struct ieee80211_link_data *link = 8980 container_of(work, struct ieee80211_link_data, 8981 u.mgd.request_smps_work); 8982 8983 __ieee80211_request_smps_mgd(link->sdata, link, 8984 link->u.mgd.driver_smps_mode); 8985 } 8986 8987 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8988 struct wiphy_work *work) 8989 { 8990 struct ieee80211_sub_if_data *sdata = 8991 container_of(work, struct ieee80211_sub_if_data, 8992 u.mgd.reconf.wk.work); 8993 8994 if (!sdata->u.mgd.reconf.added_links && 8995 !sdata->u.mgd.reconf.removed_links) 8996 return; 8997 8998 sdata_info(sdata, 8999 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 9000 sdata->u.mgd.reconf.added_links, 9001 sdata->u.mgd.reconf.removed_links); 9002 9003 __ieee80211_disconnect(sdata); 9004 } 9005 9006 /* interface setup */ 9007 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 9008 { 9009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9010 9011 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 9012 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 9013 ieee80211_beacon_connection_loss_work); 9014 wiphy_work_init(&ifmgd->csa_connection_drop_work, 9015 ieee80211_csa_connection_drop_work); 9016 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 9017 ieee80211_tdls_peer_del_work); 9018 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 9019 ieee80211_ml_reconf_work); 9020 wiphy_delayed_work_init(&ifmgd->reconf.wk, 9021 ieee80211_ml_sta_reconf_timeout); 9022 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 9023 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 9024 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 9025 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 9026 ieee80211_sta_handle_tspec_ac_params_wk); 9027 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 9028 ieee80211_tid_to_link_map_work); 9029 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 9030 ieee80211_neg_ttlm_timeout_work); 9031 wiphy_work_init(&ifmgd->teardown_ttlm_work, 9032 ieee80211_teardown_ttlm_work); 9033 9034 ifmgd->flags = 0; 9035 ifmgd->powersave = sdata->wdev.ps; 9036 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 9037 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 9038 /* Setup TDLS data */ 9039 spin_lock_init(&ifmgd->teardown_lock); 9040 ifmgd->teardown_skb = NULL; 9041 ifmgd->orig_teardown_skb = NULL; 9042 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 9043 } 9044 9045 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 9046 struct wiphy_work *work) 9047 { 9048 struct ieee80211_link_data *link = 9049 container_of(work, struct ieee80211_link_data, 9050 u.mgd.recalc_smps); 9051 9052 ieee80211_recalc_smps(link->sdata, link); 9053 } 9054 9055 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 9056 { 9057 struct ieee80211_sub_if_data *sdata = link->sdata; 9058 struct ieee80211_local *local = sdata->local; 9059 unsigned int link_id = link->link_id; 9060 9061 link->u.mgd.p2p_noa_index = -1; 9062 link->conf->bssid = link->u.mgd.bssid; 9063 link->smps_mode = IEEE80211_SMPS_OFF; 9064 9065 wiphy_work_init(&link->u.mgd.request_smps_work, 9066 ieee80211_request_smps_mgd_work); 9067 wiphy_work_init(&link->u.mgd.recalc_smps, 9068 ieee80211_recalc_smps_work); 9069 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 9070 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 9071 else 9072 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 9073 9074 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 9075 ieee80211_csa_switch_work); 9076 9077 ieee80211_clear_tpe(&link->conf->tpe); 9078 9079 if (sdata->u.mgd.assoc_data) 9080 ether_addr_copy(link->conf->addr, 9081 sdata->u.mgd.assoc_data->link[link_id].addr); 9082 else if (sdata->u.mgd.reconf.add_links_data) 9083 ether_addr_copy(link->conf->addr, 9084 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 9085 else if (!is_valid_ether_addr(link->conf->addr)) 9086 eth_random_addr(link->conf->addr); 9087 } 9088 9089 /* scan finished notification */ 9090 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 9091 { 9092 struct ieee80211_sub_if_data *sdata; 9093 9094 /* Restart STA timers */ 9095 rcu_read_lock(); 9096 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 9097 if (ieee80211_sdata_running(sdata)) 9098 ieee80211_restart_sta_timer(sdata); 9099 } 9100 rcu_read_unlock(); 9101 } 9102 9103 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 9104 struct cfg80211_bss *cbss, s8 link_id, 9105 const u8 *ap_mld_addr, bool assoc, 9106 struct ieee80211_conn_settings *conn, 9107 bool override, 9108 unsigned long *userspace_selectors) 9109 { 9110 struct ieee80211_local *local = sdata->local; 9111 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9112 struct ieee80211_bss *bss = (void *)cbss->priv; 9113 struct sta_info *new_sta = NULL; 9114 struct ieee80211_link_data *link; 9115 struct sta_info *have_sta = NULL; 9116 bool mlo; 9117 int err; 9118 u16 new_links; 9119 9120 if (link_id >= 0) { 9121 mlo = true; 9122 if (WARN_ON(!ap_mld_addr)) 9123 return -EINVAL; 9124 new_links = BIT(link_id); 9125 } else { 9126 if (WARN_ON(ap_mld_addr)) 9127 return -EINVAL; 9128 ap_mld_addr = cbss->bssid; 9129 new_links = 0; 9130 link_id = 0; 9131 mlo = false; 9132 } 9133 9134 if (assoc) 9135 have_sta = sta_info_get(sdata, ap_mld_addr); 9136 9137 if (mlo && !have_sta && 9138 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 9139 return -EINVAL; 9140 9141 err = ieee80211_vif_set_links(sdata, new_links, 0); 9142 if (err) 9143 return err; 9144 9145 link = sdata_dereference(sdata->link[link_id], sdata); 9146 if (WARN_ON(!link)) { 9147 err = -ENOLINK; 9148 goto out_err; 9149 } 9150 9151 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 9152 err = -EINVAL; 9153 goto out_err; 9154 } 9155 9156 /* If a reconfig is happening, bail out */ 9157 if (local->in_reconfig) { 9158 err = -EBUSY; 9159 goto out_err; 9160 } 9161 9162 if (!have_sta) { 9163 if (mlo) 9164 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 9165 link_id, cbss->bssid, 9166 GFP_KERNEL); 9167 else 9168 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 9169 9170 if (!new_sta) { 9171 err = -ENOMEM; 9172 goto out_err; 9173 } 9174 9175 if (ifmgd->auth_data && 9176 (ifmgd->auth_data->algorithm == WLAN_AUTH_EPPKE || 9177 ifmgd->auth_data->algorithm == WLAN_AUTH_IEEE8021X)) 9178 new_sta->sta.epp_peer = true; 9179 9180 new_sta->sta.mlo = mlo; 9181 } 9182 9183 /* 9184 * Set up the information for the new channel before setting the 9185 * new channel. We can't - completely race-free - change the basic 9186 * rates bitmap and the channel (sband) that it refers to, but if 9187 * we set it up before we at least avoid calling into the driver's 9188 * bss_info_changed() method with invalid information (since we do 9189 * call that from changing the channel - only for IDLE and perhaps 9190 * some others, but ...). 9191 * 9192 * So to avoid that, just set up all the new information before the 9193 * channel, but tell the driver to apply it only afterwards, since 9194 * it might need the new channel for that. 9195 */ 9196 if (new_sta) { 9197 const struct cfg80211_bss_ies *ies; 9198 struct link_sta_info *link_sta; 9199 9200 rcu_read_lock(); 9201 link_sta = rcu_dereference(new_sta->link[link_id]); 9202 if (WARN_ON(!link_sta)) { 9203 rcu_read_unlock(); 9204 sta_info_free(local, new_sta); 9205 err = -EINVAL; 9206 goto out_err; 9207 } 9208 9209 err = ieee80211_mgd_setup_link_sta(link, new_sta, 9210 link_sta, cbss); 9211 if (err) { 9212 rcu_read_unlock(); 9213 sta_info_free(local, new_sta); 9214 goto out_err; 9215 } 9216 9217 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9218 9219 /* set timing information */ 9220 link->conf->beacon_int = cbss->beacon_interval; 9221 ies = rcu_dereference(cbss->beacon_ies); 9222 if (ies) { 9223 link->conf->sync_tsf = ies->tsf; 9224 link->conf->sync_device_ts = 9225 bss->device_ts_beacon; 9226 9227 ieee80211_get_dtim(ies, 9228 &link->conf->sync_dtim_count, 9229 NULL); 9230 } else if (!ieee80211_hw_check(&sdata->local->hw, 9231 TIMING_BEACON_ONLY)) { 9232 ies = rcu_dereference(cbss->proberesp_ies); 9233 /* must be non-NULL since beacon IEs were NULL */ 9234 link->conf->sync_tsf = ies->tsf; 9235 link->conf->sync_device_ts = 9236 bss->device_ts_presp; 9237 link->conf->sync_dtim_count = 0; 9238 } else { 9239 link->conf->sync_tsf = 0; 9240 link->conf->sync_device_ts = 0; 9241 link->conf->sync_dtim_count = 0; 9242 } 9243 rcu_read_unlock(); 9244 } 9245 9246 if (new_sta || override) { 9247 /* 9248 * Only set this if we're also going to calculate the AP 9249 * settings etc., otherwise this was set before in a 9250 * previous call. Note override is set to %true in assoc 9251 * if the settings were changed. 9252 */ 9253 link->u.mgd.conn = *conn; 9254 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9255 mlo, &link->u.mgd.conn, 9256 userspace_selectors); 9257 if (err) { 9258 if (new_sta) 9259 sta_info_free(local, new_sta); 9260 goto out_err; 9261 } 9262 /* pass out for use in assoc */ 9263 *conn = link->u.mgd.conn; 9264 } 9265 9266 if (new_sta) { 9267 /* 9268 * tell driver about BSSID, basic rates and timing 9269 * this was set up above, before setting the channel 9270 */ 9271 ieee80211_link_info_change_notify(sdata, link, 9272 BSS_CHANGED_BSSID | 9273 BSS_CHANGED_BASIC_RATES | 9274 BSS_CHANGED_BEACON_INT); 9275 9276 if (assoc) 9277 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9278 9279 err = sta_info_insert(new_sta); 9280 new_sta = NULL; 9281 if (err) { 9282 sdata_info(sdata, 9283 "failed to insert STA entry for the AP (error %d)\n", 9284 err); 9285 goto out_release_chan; 9286 } 9287 } else 9288 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9289 9290 /* Cancel scan to ensure that nothing interferes with connection */ 9291 if (local->scanning) 9292 ieee80211_scan_cancel(local); 9293 9294 return 0; 9295 9296 out_release_chan: 9297 ieee80211_link_release_channel(link); 9298 out_err: 9299 if (mlo && have_sta) 9300 WARN_ON(__sta_info_destroy(have_sta)); 9301 ieee80211_vif_set_links(sdata, 0, 0); 9302 return err; 9303 } 9304 9305 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9306 const struct cfg80211_bss_ies *ies, 9307 u8 cur_channel, bool ignore_ecsa) 9308 { 9309 const struct element *csa_elem, *ecsa_elem; 9310 struct ieee80211_channel_sw_ie *csa = NULL; 9311 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9312 9313 if (!ies) 9314 return false; 9315 9316 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9317 ies->data, ies->len); 9318 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9319 csa = (void *)csa_elem->data; 9320 9321 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9322 ies->data, ies->len); 9323 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9324 ecsa = (void *)ecsa_elem->data; 9325 9326 if (csa && csa->count == 0) 9327 csa = NULL; 9328 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9329 csa = NULL; 9330 9331 if (ecsa && ecsa->count == 0) 9332 ecsa = NULL; 9333 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9334 ecsa = NULL; 9335 9336 if (ignore_ecsa && ecsa) { 9337 sdata_info(sdata, 9338 "Ignoring ECSA in probe response - was considered stuck!\n"); 9339 return csa; 9340 } 9341 9342 return csa || ecsa; 9343 } 9344 9345 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9346 struct cfg80211_bss *bss) 9347 { 9348 u8 cur_channel; 9349 bool ret; 9350 9351 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9352 9353 rcu_read_lock(); 9354 if (ieee80211_mgd_csa_present(sdata, 9355 rcu_dereference(bss->beacon_ies), 9356 cur_channel, false)) { 9357 ret = true; 9358 goto out; 9359 } 9360 9361 if (ieee80211_mgd_csa_present(sdata, 9362 rcu_dereference(bss->proberesp_ies), 9363 cur_channel, bss->proberesp_ecsa_stuck)) { 9364 ret = true; 9365 goto out; 9366 } 9367 9368 ret = false; 9369 out: 9370 rcu_read_unlock(); 9371 return ret; 9372 } 9373 9374 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9375 const u8 *supported_selectors, 9376 u8 supported_selectors_len) 9377 { 9378 if (supported_selectors) { 9379 for (int i = 0; i < supported_selectors_len; i++) { 9380 set_bit(supported_selectors[i], 9381 userspace_selectors); 9382 } 9383 } else { 9384 /* Assume SAE_H2E support for backward compatibility. */ 9385 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9386 userspace_selectors); 9387 } 9388 } 9389 9390 /* config hooks */ 9391 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9392 struct cfg80211_auth_request *req) 9393 { 9394 struct ieee80211_local *local = sdata->local; 9395 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9396 struct ieee80211_mgd_auth_data *auth_data; 9397 struct ieee80211_conn_settings conn; 9398 struct ieee80211_link_data *link; 9399 struct ieee80211_supported_band *sband; 9400 struct ieee80211_bss *bss; 9401 u16 auth_alg; 9402 int err; 9403 bool cont_auth, wmm_used; 9404 9405 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9406 9407 /* prepare auth data structure */ 9408 9409 switch (req->auth_type) { 9410 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9411 auth_alg = WLAN_AUTH_OPEN; 9412 break; 9413 case NL80211_AUTHTYPE_SHARED_KEY: 9414 if (fips_enabled) 9415 return -EOPNOTSUPP; 9416 auth_alg = WLAN_AUTH_SHARED_KEY; 9417 break; 9418 case NL80211_AUTHTYPE_FT: 9419 auth_alg = WLAN_AUTH_FT; 9420 break; 9421 case NL80211_AUTHTYPE_NETWORK_EAP: 9422 auth_alg = WLAN_AUTH_LEAP; 9423 break; 9424 case NL80211_AUTHTYPE_SAE: 9425 auth_alg = WLAN_AUTH_SAE; 9426 break; 9427 case NL80211_AUTHTYPE_FILS_SK: 9428 auth_alg = WLAN_AUTH_FILS_SK; 9429 break; 9430 case NL80211_AUTHTYPE_FILS_SK_PFS: 9431 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9432 break; 9433 case NL80211_AUTHTYPE_FILS_PK: 9434 auth_alg = WLAN_AUTH_FILS_PK; 9435 break; 9436 case NL80211_AUTHTYPE_EPPKE: 9437 auth_alg = WLAN_AUTH_EPPKE; 9438 break; 9439 case NL80211_AUTHTYPE_IEEE8021X: 9440 auth_alg = WLAN_AUTH_IEEE8021X; 9441 break; 9442 default: 9443 return -EOPNOTSUPP; 9444 } 9445 9446 if (ifmgd->assoc_data) 9447 return -EBUSY; 9448 9449 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9450 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9451 return -EINVAL; 9452 } 9453 9454 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9455 req->ie_len, GFP_KERNEL); 9456 if (!auth_data) 9457 return -ENOMEM; 9458 9459 memcpy(auth_data->ap_addr, 9460 req->ap_mld_addr ?: req->bss->bssid, 9461 ETH_ALEN); 9462 auth_data->bss = req->bss; 9463 auth_data->link_id = req->link_id; 9464 9465 if (req->auth_data_len >= 4) { 9466 if (req->auth_type == NL80211_AUTHTYPE_SAE || 9467 req->auth_type == NL80211_AUTHTYPE_EPPKE || 9468 req->auth_type == NL80211_AUTHTYPE_IEEE8021X) { 9469 __le16 *pos = (__le16 *) req->auth_data; 9470 9471 auth_data->trans = le16_to_cpu(pos[0]); 9472 auth_data->status = le16_to_cpu(pos[1]); 9473 } 9474 9475 memcpy(auth_data->data, req->auth_data + 4, 9476 req->auth_data_len - 4); 9477 auth_data->data_len += req->auth_data_len - 4; 9478 } 9479 9480 /* Check if continuing authentication or trying to authenticate with the 9481 * same BSS that we were in the process of authenticating with and avoid 9482 * removal and re-addition of the STA entry in 9483 * ieee80211_prep_connection(). 9484 */ 9485 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9486 ifmgd->auth_data->link_id == req->link_id; 9487 9488 if (req->ie && req->ie_len) { 9489 memcpy(&auth_data->data[auth_data->data_len], 9490 req->ie, req->ie_len); 9491 auth_data->data_len += req->ie_len; 9492 } 9493 9494 if (req->key && req->key_len) { 9495 auth_data->key_len = req->key_len; 9496 auth_data->key_idx = req->key_idx; 9497 memcpy(auth_data->key, req->key, req->key_len); 9498 } 9499 9500 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9501 req->supported_selectors, 9502 req->supported_selectors_len); 9503 9504 auth_data->algorithm = auth_alg; 9505 9506 /* try to authenticate/probe */ 9507 9508 if (ifmgd->auth_data) { 9509 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9510 auth_data->peer_confirmed = 9511 ifmgd->auth_data->peer_confirmed; 9512 } 9513 ieee80211_destroy_auth_data(sdata, cont_auth); 9514 } 9515 9516 /* prep auth_data so we don't go into idle on disassoc */ 9517 ifmgd->auth_data = auth_data; 9518 9519 /* If this is continuation of an ongoing SAE authentication exchange 9520 * (i.e., request to send SAE Confirm) and the peer has already 9521 * confirmed, mark authentication completed since we are about to send 9522 * out SAE Confirm. 9523 */ 9524 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9525 auth_data->peer_confirmed && auth_data->trans == 2) 9526 ieee80211_mark_sta_auth(sdata); 9527 9528 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_EPPKE && 9529 auth_data->trans == 3) 9530 ieee80211_mark_sta_auth(sdata); 9531 9532 if (ifmgd->associated) { 9533 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9534 9535 sdata_info(sdata, 9536 "disconnect from AP %pM for new auth to %pM\n", 9537 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9538 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9539 WLAN_REASON_UNSPECIFIED, 9540 false, frame_buf); 9541 9542 ieee80211_report_disconnect(sdata, frame_buf, 9543 sizeof(frame_buf), true, 9544 WLAN_REASON_UNSPECIFIED, 9545 false); 9546 } 9547 9548 /* needed for transmitting the auth frame(s) properly */ 9549 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9550 9551 bss = (void *)req->bss->priv; 9552 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9553 9554 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9555 9556 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9557 &conn); 9558 9559 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9560 req->ap_mld_addr, cont_auth, 9561 &conn, false, 9562 auth_data->userspace_selectors); 9563 if (err) 9564 goto err_clear; 9565 9566 if (req->link_id >= 0) 9567 link = sdata_dereference(sdata->link[req->link_id], sdata); 9568 else 9569 link = &sdata->deflink; 9570 9571 if (WARN_ON(!link)) { 9572 err = -ENOLINK; 9573 goto err_clear; 9574 } 9575 9576 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9577 auth_data->ap_addr, link->conf->addr); 9578 9579 err = ieee80211_auth(sdata); 9580 if (err) { 9581 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9582 goto err_clear; 9583 } 9584 9585 /* hold our own reference */ 9586 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9587 return 0; 9588 9589 err_clear: 9590 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9591 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9592 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9593 BSS_CHANGED_BSSID); 9594 ieee80211_link_release_channel(&sdata->deflink); 9595 } 9596 ifmgd->auth_data = NULL; 9597 kfree(auth_data); 9598 return err; 9599 } 9600 9601 static void 9602 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9603 struct ieee80211_mgd_assoc_data *assoc_data, 9604 struct cfg80211_assoc_request *req, 9605 struct ieee80211_conn_settings *conn, 9606 unsigned int link_id) 9607 { 9608 struct ieee80211_local *local = sdata->local; 9609 const struct cfg80211_bss_ies *bss_ies; 9610 struct ieee80211_supported_band *sband; 9611 struct ieee80211_link_data *link; 9612 struct cfg80211_bss *cbss; 9613 struct ieee80211_bss *bss; 9614 9615 cbss = assoc_data->link[link_id].bss; 9616 if (WARN_ON(!cbss)) 9617 return; 9618 9619 bss = (void *)cbss->priv; 9620 9621 sband = local->hw.wiphy->bands[cbss->channel->band]; 9622 if (WARN_ON(!sband)) 9623 return; 9624 9625 link = sdata_dereference(sdata->link[link_id], sdata); 9626 if (WARN_ON(!link)) 9627 return; 9628 9629 /* for MLO connections assume advertising all rates is OK */ 9630 if (!req->ap_mld_addr) { 9631 assoc_data->supp_rates = bss->supp_rates; 9632 assoc_data->supp_rates_len = bss->supp_rates_len; 9633 } 9634 9635 /* copy and link elems for the STA profile */ 9636 if (req->links[link_id].elems_len) { 9637 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9638 req->links[link_id].elems_len); 9639 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9640 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9641 assoc_data->ie_pos += req->links[link_id].elems_len; 9642 } 9643 9644 link->u.mgd.beacon_crc_valid = false; 9645 link->u.mgd.dtim_period = 0; 9646 link->u.mgd.have_beacon = false; 9647 9648 /* override HT configuration only if the AP and we support it */ 9649 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9650 struct ieee80211_sta_ht_cap sta_ht_cap; 9651 9652 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9653 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9654 } 9655 9656 rcu_read_lock(); 9657 bss_ies = rcu_dereference(cbss->beacon_ies); 9658 if (bss_ies) { 9659 u8 dtim_count = 0; 9660 9661 ieee80211_get_dtim(bss_ies, &dtim_count, 9662 &link->u.mgd.dtim_period); 9663 9664 sdata->deflink.u.mgd.have_beacon = true; 9665 9666 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9667 link->conf->sync_tsf = bss_ies->tsf; 9668 link->conf->sync_device_ts = bss->device_ts_beacon; 9669 link->conf->sync_dtim_count = dtim_count; 9670 } 9671 } else { 9672 bss_ies = rcu_dereference(cbss->ies); 9673 } 9674 9675 if (bss_ies) { 9676 const struct element *elem; 9677 9678 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9679 bss_ies->data, bss_ies->len); 9680 if (elem && elem->datalen >= 3) 9681 link->conf->profile_periodicity = elem->data[2]; 9682 else 9683 link->conf->profile_periodicity = 0; 9684 9685 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9686 bss_ies->data, bss_ies->len); 9687 if (elem && elem->datalen >= 11 && 9688 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9689 link->conf->ema_ap = true; 9690 else 9691 link->conf->ema_ap = false; 9692 } 9693 rcu_read_unlock(); 9694 9695 if (bss->corrupt_data) { 9696 char *corrupt_type = "data"; 9697 9698 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9699 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9700 corrupt_type = "beacon and probe response"; 9701 else 9702 corrupt_type = "beacon"; 9703 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9704 corrupt_type = "probe response"; 9705 } 9706 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9707 cbss->bssid, corrupt_type); 9708 } 9709 9710 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9711 if (sdata->u.mgd.powersave) 9712 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9713 else 9714 link->smps_mode = IEEE80211_SMPS_OFF; 9715 } else { 9716 link->smps_mode = link->u.mgd.req_smps; 9717 } 9718 } 9719 9720 static int 9721 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9722 struct ieee80211_mgd_assoc_data *assoc_data, 9723 int link_id) 9724 { 9725 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9726 enum nl80211_band band = cbss->channel->band; 9727 struct ieee80211_supported_band *sband; 9728 const struct element *elem; 9729 int err; 9730 9731 /* neither HT nor VHT elements used on 6 GHz */ 9732 if (band == NL80211_BAND_6GHZ) 9733 return 0; 9734 9735 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9736 return 0; 9737 9738 rcu_read_lock(); 9739 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9740 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9741 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9742 cbss->bssid); 9743 err = -EINVAL; 9744 goto out_rcu; 9745 } 9746 assoc_data->link[link_id].ap_ht_param = 9747 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9748 rcu_read_unlock(); 9749 9750 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9751 return 0; 9752 9753 /* some drivers want to support VHT on 2.4 GHz even */ 9754 sband = sdata->local->hw.wiphy->bands[band]; 9755 if (!sband->vht_cap.vht_supported) 9756 return 0; 9757 9758 rcu_read_lock(); 9759 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9760 /* but even then accept it not being present on the AP */ 9761 if (!elem && band == NL80211_BAND_2GHZ) { 9762 err = 0; 9763 goto out_rcu; 9764 } 9765 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9766 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9767 cbss->bssid); 9768 err = -EINVAL; 9769 goto out_rcu; 9770 } 9771 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9772 sizeof(struct ieee80211_vht_cap)); 9773 rcu_read_unlock(); 9774 9775 return 0; 9776 out_rcu: 9777 rcu_read_unlock(); 9778 return err; 9779 } 9780 9781 static bool 9782 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9783 { 9784 const struct cfg80211_bss_ies *ies; 9785 struct cfg80211_bss *bss; 9786 const struct element *ml; 9787 9788 /* not an MLO connection if link_id < 0, so irrelevant */ 9789 if (req->link_id < 0) 9790 return false; 9791 9792 bss = req->links[req->link_id].bss; 9793 9794 guard(rcu)(); 9795 ies = rcu_dereference(bss->ies); 9796 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9797 ies->data, ies->len) { 9798 const struct ieee80211_multi_link_elem *mle; 9799 9800 if (!ieee80211_mle_type_ok(ml->data + 1, 9801 IEEE80211_ML_CONTROL_TYPE_BASIC, 9802 ml->datalen - 1)) 9803 continue; 9804 9805 mle = (void *)(ml->data + 1); 9806 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9807 return true; 9808 } 9809 9810 return false; 9811 9812 } 9813 9814 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9815 struct cfg80211_assoc_request *req) 9816 { 9817 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9818 struct ieee80211_local *local = sdata->local; 9819 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9820 struct ieee80211_mgd_assoc_data *assoc_data; 9821 const struct element *ssid_elem; 9822 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9823 const struct wiphy_iftype_ext_capab *ift_ext_capa; 9824 struct ieee80211_link_data *link; 9825 u16 driver_ext_mld_capa_ops = 0; 9826 struct cfg80211_bss *cbss; 9827 bool override, uapsd_supported; 9828 bool match_auth; 9829 int i, err; 9830 size_t size = sizeof(*assoc_data) + req->ie_len; 9831 9832 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9833 size += req->links[i].elems_len; 9834 9835 assoc_data = kzalloc(size, GFP_KERNEL); 9836 if (!assoc_data) 9837 return -ENOMEM; 9838 9839 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9840 9841 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9842 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9843 err = -EINVAL; 9844 goto err_free; 9845 } 9846 9847 rcu_read_lock(); 9848 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9849 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9850 rcu_read_unlock(); 9851 err = -EINVAL; 9852 goto err_free; 9853 } 9854 9855 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9856 assoc_data->ssid_len = ssid_elem->datalen; 9857 rcu_read_unlock(); 9858 9859 if (req->ap_mld_addr) 9860 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9861 else 9862 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9863 9864 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 9865 ieee80211_vif_type_p2p(&sdata->vif)); 9866 if (ift_ext_capa) 9867 driver_ext_mld_capa_ops = ift_ext_capa->ext_mld_capa_and_ops; 9868 9869 /* 9870 * Many APs have broken parsing of the extended MLD capa/ops field, 9871 * dropping (re-)association request frames or replying with association 9872 * response with a failure status if it's present. 9873 * Set our value from the userspace request only in strict mode or if 9874 * the AP also had that field present. 9875 * For UHR we may want to advertise ML-PM (per driver_ext_mld_capa_ops) 9876 * but if the AP doesn't have it then it's pointless, and if it does 9877 * then it has to have the extended MLD capa/ops field. 9878 */ 9879 if (ieee80211_hw_check(&local->hw, STRICT) || 9880 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9881 assoc_data->ext_mld_capa_ops = 9882 cpu_to_le16(req->ext_mld_capa_ops | 9883 driver_ext_mld_capa_ops); 9884 9885 if (ifmgd->associated) { 9886 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9887 9888 sdata_info(sdata, 9889 "disconnect from AP %pM for new assoc to %pM\n", 9890 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9891 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9892 WLAN_REASON_UNSPECIFIED, 9893 false, frame_buf); 9894 9895 ieee80211_report_disconnect(sdata, frame_buf, 9896 sizeof(frame_buf), true, 9897 WLAN_REASON_UNSPECIFIED, 9898 false); 9899 } 9900 9901 memset(sdata->u.mgd.userspace_selectors, 0, 9902 sizeof(sdata->u.mgd.userspace_selectors)); 9903 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9904 req->supported_selectors, 9905 req->supported_selectors_len); 9906 9907 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9908 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9909 sizeof(ifmgd->ht_capa_mask)); 9910 9911 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9912 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9913 sizeof(ifmgd->vht_capa_mask)); 9914 9915 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9916 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9917 sizeof(ifmgd->s1g_capa_mask)); 9918 9919 /* keep some setup (AP STA, channel, ...) if matching */ 9920 match_auth = ifmgd->auth_data && 9921 ether_addr_equal(ifmgd->auth_data->ap_addr, 9922 assoc_data->ap_addr) && 9923 ifmgd->auth_data->link_id == req->link_id; 9924 9925 if (req->ap_mld_addr) { 9926 uapsd_supported = true; 9927 9928 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9929 ASSOC_REQ_DISABLE_VHT | 9930 ASSOC_REQ_DISABLE_HE | 9931 ASSOC_REQ_DISABLE_EHT)) { 9932 err = -EINVAL; 9933 goto err_free; 9934 } 9935 9936 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9937 struct ieee80211_supported_band *sband; 9938 struct cfg80211_bss *link_cbss = req->links[i].bss; 9939 struct ieee80211_bss *bss; 9940 9941 if (!link_cbss) 9942 continue; 9943 9944 bss = (void *)link_cbss->priv; 9945 9946 if (!bss->wmm_used) { 9947 err = -EINVAL; 9948 req->links[i].error = err; 9949 goto err_free; 9950 } 9951 9952 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9953 err = -EINVAL; 9954 req->links[i].error = err; 9955 goto err_free; 9956 } 9957 9958 link = sdata_dereference(sdata->link[i], sdata); 9959 if (link) 9960 ether_addr_copy(assoc_data->link[i].addr, 9961 link->conf->addr); 9962 else 9963 eth_random_addr(assoc_data->link[i].addr); 9964 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9965 9966 if (match_auth && i == assoc_link_id && link) 9967 assoc_data->link[i].conn = link->u.mgd.conn; 9968 else 9969 assoc_data->link[i].conn = 9970 ieee80211_conn_settings_unlimited; 9971 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9972 req, true, i, 9973 &assoc_data->link[i].conn); 9974 assoc_data->link[i].bss = link_cbss; 9975 9976 if (!bss->uapsd_supported) 9977 uapsd_supported = false; 9978 9979 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9980 err = -EINVAL; 9981 req->links[i].error = err; 9982 goto err_free; 9983 } 9984 9985 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9986 assoc_data, i); 9987 if (err) { 9988 err = -EINVAL; 9989 req->links[i].error = err; 9990 goto err_free; 9991 } 9992 } 9993 9994 assoc_data->wmm = true; 9995 } else { 9996 struct ieee80211_supported_band *sband; 9997 struct ieee80211_bss *bss = (void *)cbss->priv; 9998 9999 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 10000 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 10001 10002 assoc_data->wmm = bss->wmm_used && 10003 (local->hw.queues >= IEEE80211_NUM_ACS); 10004 10005 if (cbss->channel->band == NL80211_BAND_6GHZ && 10006 req->flags & (ASSOC_REQ_DISABLE_HT | 10007 ASSOC_REQ_DISABLE_VHT | 10008 ASSOC_REQ_DISABLE_HE)) { 10009 err = -EINVAL; 10010 goto err_free; 10011 } 10012 10013 sband = local->hw.wiphy->bands[cbss->channel->band]; 10014 10015 assoc_data->link[0].bss = cbss; 10016 10017 if (match_auth) 10018 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 10019 else 10020 assoc_data->link[0].conn = 10021 ieee80211_conn_settings_unlimited; 10022 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 10023 assoc_data->wmm, 0, 10024 &assoc_data->link[0].conn); 10025 10026 uapsd_supported = bss->uapsd_supported; 10027 10028 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 10029 if (err) 10030 goto err_free; 10031 } 10032 10033 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 10034 10035 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 10036 err = -EBUSY; 10037 goto err_free; 10038 } 10039 10040 if (ifmgd->assoc_data) { 10041 err = -EBUSY; 10042 goto err_free; 10043 } 10044 10045 /* Cleanup is delayed if auth_data matches */ 10046 if (ifmgd->auth_data && !match_auth) 10047 ieee80211_destroy_auth_data(sdata, false); 10048 10049 if (req->ie && req->ie_len) { 10050 memcpy(assoc_data->ie, req->ie, req->ie_len); 10051 assoc_data->ie_len = req->ie_len; 10052 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 10053 } else { 10054 assoc_data->ie_pos = assoc_data->ie; 10055 } 10056 10057 if (req->fils_kek) { 10058 /* should already be checked in cfg80211 - so warn */ 10059 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 10060 err = -EINVAL; 10061 goto err_free; 10062 } 10063 memcpy(assoc_data->fils_kek, req->fils_kek, 10064 req->fils_kek_len); 10065 assoc_data->fils_kek_len = req->fils_kek_len; 10066 } 10067 10068 if (req->fils_nonces) 10069 memcpy(assoc_data->fils_nonces, req->fils_nonces, 10070 2 * FILS_NONCE_LEN); 10071 10072 /* default timeout */ 10073 assoc_data->timeout = jiffies; 10074 assoc_data->timeout_started = true; 10075 10076 assoc_data->assoc_link_id = assoc_link_id; 10077 10078 if (req->ap_mld_addr) { 10079 /* if there was no authentication, set up the link */ 10080 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 10081 if (err) 10082 goto err_clear; 10083 } 10084 10085 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 10086 if (WARN_ON(!link)) { 10087 err = -EINVAL; 10088 goto err_clear; 10089 } 10090 10091 override = link->u.mgd.conn.mode != 10092 assoc_data->link[assoc_link_id].conn.mode || 10093 link->u.mgd.conn.bw_limit != 10094 assoc_data->link[assoc_link_id].conn.bw_limit; 10095 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 10096 10097 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 10098 assoc_link_id); 10099 10100 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 10101 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 10102 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 10103 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 10104 10105 if (assoc_data->wmm && uapsd_supported && 10106 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 10107 assoc_data->uapsd = true; 10108 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 10109 } else { 10110 assoc_data->uapsd = false; 10111 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 10112 } 10113 10114 if (req->prev_bssid) 10115 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 10116 10117 if (req->use_mfp) { 10118 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 10119 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 10120 } else { 10121 ifmgd->mfp = IEEE80211_MFP_DISABLED; 10122 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 10123 } 10124 10125 if (req->flags & ASSOC_REQ_USE_RRM) 10126 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 10127 else 10128 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 10129 10130 if (req->crypto.control_port) 10131 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 10132 else 10133 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 10134 10135 sdata->control_port_protocol = req->crypto.control_port_ethertype; 10136 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 10137 sdata->control_port_over_nl80211 = 10138 req->crypto.control_port_over_nl80211; 10139 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 10140 10141 /* kick off associate process */ 10142 ifmgd->assoc_data = assoc_data; 10143 10144 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 10145 if (!assoc_data->link[i].bss) 10146 continue; 10147 if (i == assoc_data->assoc_link_id) 10148 continue; 10149 /* only calculate the mode, hence link == NULL */ 10150 err = ieee80211_prep_channel(sdata, NULL, i, 10151 assoc_data->link[i].bss, true, 10152 &assoc_data->link[i].conn, 10153 sdata->u.mgd.userspace_selectors); 10154 if (err) { 10155 req->links[i].error = err; 10156 goto err_clear; 10157 } 10158 } 10159 10160 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 10161 vif_cfg->ssid_len = assoc_data->ssid_len; 10162 10163 /* needed for transmitting the assoc frames properly */ 10164 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 10165 10166 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 10167 req->ap_mld_addr, true, 10168 &assoc_data->link[assoc_link_id].conn, 10169 override, 10170 sdata->u.mgd.userspace_selectors); 10171 if (err) 10172 goto err_clear; 10173 10174 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 10175 const struct cfg80211_bss_ies *beacon_ies; 10176 10177 rcu_read_lock(); 10178 beacon_ies = rcu_dereference(req->bss->beacon_ies); 10179 if (!beacon_ies) { 10180 /* 10181 * Wait up to one beacon interval ... 10182 * should this be more if we miss one? 10183 */ 10184 sdata_info(sdata, "waiting for beacon from %pM\n", 10185 link->u.mgd.bssid); 10186 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 10187 assoc_data->timeout_started = true; 10188 assoc_data->need_beacon = true; 10189 } 10190 rcu_read_unlock(); 10191 } 10192 10193 run_again(sdata, assoc_data->timeout); 10194 10195 /* We are associating, clean up auth_data */ 10196 if (ifmgd->auth_data) 10197 ieee80211_destroy_auth_data(sdata, true); 10198 10199 return 0; 10200 err_clear: 10201 if (!ifmgd->auth_data) { 10202 eth_zero_addr(sdata->deflink.u.mgd.bssid); 10203 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 10204 BSS_CHANGED_BSSID); 10205 } 10206 ifmgd->assoc_data = NULL; 10207 err_free: 10208 kfree(assoc_data); 10209 return err; 10210 } 10211 10212 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 10213 struct cfg80211_deauth_request *req) 10214 { 10215 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10216 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10217 bool tx = !req->local_state_change; 10218 struct ieee80211_prep_tx_info info = { 10219 .subtype = IEEE80211_STYPE_DEAUTH, 10220 }; 10221 10222 if (ifmgd->auth_data && 10223 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 10224 sdata_info(sdata, 10225 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 10226 req->bssid, req->reason_code, 10227 ieee80211_get_reason_code_string(req->reason_code)); 10228 10229 info.link_id = ifmgd->auth_data->link_id; 10230 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10231 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10232 IEEE80211_STYPE_DEAUTH, 10233 req->reason_code, tx, 10234 frame_buf); 10235 ieee80211_destroy_auth_data(sdata, false); 10236 ieee80211_report_disconnect(sdata, frame_buf, 10237 sizeof(frame_buf), true, 10238 req->reason_code, false); 10239 drv_mgd_complete_tx(sdata->local, sdata, &info); 10240 return 0; 10241 } 10242 10243 if (ifmgd->assoc_data && 10244 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10245 sdata_info(sdata, 10246 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10247 req->bssid, req->reason_code, 10248 ieee80211_get_reason_code_string(req->reason_code)); 10249 10250 info.link_id = ifmgd->assoc_data->assoc_link_id; 10251 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10252 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10253 IEEE80211_STYPE_DEAUTH, 10254 req->reason_code, tx, 10255 frame_buf); 10256 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10257 ieee80211_report_disconnect(sdata, frame_buf, 10258 sizeof(frame_buf), true, 10259 req->reason_code, false); 10260 drv_mgd_complete_tx(sdata->local, sdata, &info); 10261 return 0; 10262 } 10263 10264 if (ifmgd->associated && 10265 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10266 sdata_info(sdata, 10267 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10268 req->bssid, req->reason_code, 10269 ieee80211_get_reason_code_string(req->reason_code)); 10270 10271 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10272 req->reason_code, tx, frame_buf); 10273 ieee80211_report_disconnect(sdata, frame_buf, 10274 sizeof(frame_buf), true, 10275 req->reason_code, false); 10276 return 0; 10277 } 10278 10279 return -ENOTCONN; 10280 } 10281 10282 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10283 struct cfg80211_disassoc_request *req) 10284 { 10285 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10286 10287 if (!sdata->u.mgd.associated || 10288 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10289 return -ENOTCONN; 10290 10291 sdata_info(sdata, 10292 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10293 req->ap_addr, req->reason_code, 10294 ieee80211_get_reason_code_string(req->reason_code)); 10295 10296 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10297 req->reason_code, !req->local_state_change, 10298 frame_buf); 10299 10300 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10301 req->reason_code, false); 10302 10303 return 0; 10304 } 10305 10306 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10307 { 10308 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10309 &link->u.mgd.request_smps_work); 10310 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10311 &link->u.mgd.recalc_smps); 10312 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10313 &link->u.mgd.csa.switch_work); 10314 } 10315 10316 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10317 { 10318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10319 10320 /* 10321 * Make sure some work items will not run after this, 10322 * they will not do anything but might not have been 10323 * cancelled when disconnecting. 10324 */ 10325 wiphy_work_cancel(sdata->local->hw.wiphy, 10326 &ifmgd->monitor_work); 10327 wiphy_work_cancel(sdata->local->hw.wiphy, 10328 &ifmgd->beacon_connection_loss_work); 10329 wiphy_work_cancel(sdata->local->hw.wiphy, 10330 &ifmgd->csa_connection_drop_work); 10331 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10332 &ifmgd->tdls_peer_del_work); 10333 10334 if (ifmgd->assoc_data) 10335 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10336 if (ifmgd->auth_data) 10337 ieee80211_destroy_auth_data(sdata, false); 10338 spin_lock_bh(&ifmgd->teardown_lock); 10339 if (ifmgd->teardown_skb) { 10340 kfree_skb(ifmgd->teardown_skb); 10341 ifmgd->teardown_skb = NULL; 10342 ifmgd->orig_teardown_skb = NULL; 10343 } 10344 kfree(ifmgd->assoc_req_ies); 10345 ifmgd->assoc_req_ies = NULL; 10346 ifmgd->assoc_req_ies_len = 0; 10347 spin_unlock_bh(&ifmgd->teardown_lock); 10348 timer_delete_sync(&ifmgd->timer); 10349 } 10350 10351 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10352 enum nl80211_cqm_rssi_threshold_event rssi_event, 10353 s32 rssi_level, 10354 gfp_t gfp) 10355 { 10356 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10357 10358 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10359 10360 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10361 } 10362 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10363 10364 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10365 { 10366 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10367 10368 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10369 10370 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10371 } 10372 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10373 10374 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10375 int rssi_min_thold, 10376 int rssi_max_thold) 10377 { 10378 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10379 10380 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10381 return; 10382 10383 /* 10384 * Scale up threshold values before storing it, as the RSSI averaging 10385 * algorithm uses a scaled up value as well. Change this scaling 10386 * factor if the RSSI averaging algorithm changes. 10387 */ 10388 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10389 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10390 } 10391 10392 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10393 int rssi_min_thold, 10394 int rssi_max_thold) 10395 { 10396 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10397 10398 WARN_ON(rssi_min_thold == rssi_max_thold || 10399 rssi_min_thold > rssi_max_thold); 10400 10401 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10402 rssi_max_thold); 10403 } 10404 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10405 10406 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10407 { 10408 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10409 10410 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10411 } 10412 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10413 10414 static void 10415 ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10416 struct ieee80211_mgmt *mgmt, size_t len) 10417 { 10418 struct ieee80211_local *local = sdata->local; 10419 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10420 struct ieee80211_mgd_assoc_data *add_links_data = 10421 ifmgd->reconf.add_links_data; 10422 struct sta_info *sta; 10423 struct cfg80211_mlo_reconf_done_data done_data = {}; 10424 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10425 sdata->u.mgd.reconf.removed_links; 10426 u16 link_mask, valid_links; 10427 unsigned int link_id; 10428 size_t orig_len = len; 10429 u8 i, group_key_data_len; 10430 u8 *pos; 10431 10432 if (!ieee80211_vif_is_mld(&sdata->vif) || 10433 len < IEEE80211_MIN_ACTION_SIZE(ml_reconf_resp) || 10434 mgmt->u.action.ml_reconf_resp.dialog_token != 10435 sdata->u.mgd.reconf.dialog_token || 10436 !sta_changed_links) 10437 return; 10438 10439 pos = mgmt->u.action.ml_reconf_resp.variable; 10440 len -= offsetofend(typeof(*mgmt), u.action.ml_reconf_resp); 10441 10442 if (len < mgmt->u.action.ml_reconf_resp.count * 10443 sizeof(struct ieee80211_ml_reconf_status)) { 10444 sdata_info(sdata, 10445 "mlo: reconf: unexpected len=%zu, count=%u\n", 10446 len, mgmt->u.action.ml_reconf_resp.count); 10447 goto disconnect; 10448 } 10449 10450 link_mask = sta_changed_links; 10451 for (i = 0; i < mgmt->u.action.ml_reconf_resp.count; i++) { 10452 struct ieee80211_ml_reconf_status *reconf_status = (void *)pos; 10453 u16 status = le16_to_cpu(reconf_status->status); 10454 10455 link_id = u8_get_bits(reconf_status->info, 10456 IEEE80211_ML_RECONF_LINK_ID_MASK); 10457 10458 if (!(link_mask & BIT(link_id))) { 10459 sdata_info(sdata, 10460 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10461 link_id, sta_changed_links); 10462 goto disconnect; 10463 } 10464 10465 /* clear the corresponding link, to detect the case that 10466 * the same link was included more than one time 10467 */ 10468 link_mask &= ~BIT(link_id); 10469 10470 /* Handle failure to remove links here. Failure to remove added 10471 * links will be done later in the flow. 10472 */ 10473 if (status != WLAN_STATUS_SUCCESS) { 10474 sdata_info(sdata, 10475 "mlo: reconf: failed on link=%u, status=%u\n", 10476 link_id, status); 10477 10478 /* The AP MLD failed to remove a link that was already 10479 * removed locally. As this is not expected behavior, 10480 * disconnect 10481 */ 10482 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10483 goto disconnect; 10484 10485 /* The AP MLD failed to add a link. Remove it from the 10486 * added links. 10487 */ 10488 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10489 } 10490 10491 pos += sizeof(*reconf_status); 10492 len -= sizeof(*reconf_status); 10493 } 10494 10495 if (link_mask) { 10496 sdata_info(sdata, 10497 "mlo: reconf: no response for links=0x%x\n", 10498 link_mask); 10499 goto disconnect; 10500 } 10501 10502 if (!sdata->u.mgd.reconf.added_links) 10503 goto out; 10504 10505 if (len < 1 || len < 1 + *pos) { 10506 sdata_info(sdata, 10507 "mlo: reconf: invalid group key data length"); 10508 goto disconnect; 10509 } 10510 10511 /* The Group Key Data field must be present when links are added. This 10512 * field should be processed by userland. 10513 */ 10514 group_key_data_len = *pos++; 10515 10516 pos += group_key_data_len; 10517 len -= group_key_data_len + 1; 10518 10519 /* Process the information for the added links */ 10520 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10521 if (WARN_ON(!sta)) 10522 goto disconnect; 10523 10524 valid_links = sdata->vif.valid_links; 10525 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10526 if (!add_links_data->link[link_id].bss || 10527 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10528 continue; 10529 10530 valid_links |= BIT(link_id); 10531 if (ieee80211_sta_allocate_link(sta, link_id)) 10532 goto disconnect; 10533 } 10534 10535 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10536 link_mask = 0; 10537 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10538 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10539 struct ieee80211_link_data *link; 10540 struct link_sta_info *link_sta; 10541 u64 changed = 0; 10542 10543 if (!cbss) 10544 continue; 10545 10546 link = sdata_dereference(sdata->link[link_id], sdata); 10547 if (WARN_ON(!link)) 10548 goto disconnect; 10549 10550 link_info(link, 10551 "mlo: reconf: local address %pM, AP link address %pM\n", 10552 add_links_data->link[link_id].addr, 10553 add_links_data->link[link_id].bss->bssid); 10554 10555 link_sta = rcu_dereference_protected(sta->link[link_id], 10556 lockdep_is_held(&local->hw.wiphy->mtx)); 10557 if (WARN_ON(!link_sta)) 10558 goto disconnect; 10559 10560 if (!link->u.mgd.have_beacon) { 10561 const struct cfg80211_bss_ies *ies; 10562 10563 rcu_read_lock(); 10564 ies = rcu_dereference(cbss->beacon_ies); 10565 if (ies) 10566 link->u.mgd.have_beacon = true; 10567 else 10568 ies = rcu_dereference(cbss->ies); 10569 ieee80211_get_dtim(ies, 10570 &link->conf->sync_dtim_count, 10571 &link->u.mgd.dtim_period); 10572 link->conf->beacon_int = cbss->beacon_interval; 10573 rcu_read_unlock(); 10574 } 10575 10576 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10577 10578 link->u.mgd.conn = add_links_data->link[link_id].conn; 10579 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10580 true, &link->u.mgd.conn, 10581 sdata->u.mgd.userspace_selectors)) { 10582 link_info(link, "mlo: reconf: prep_channel failed\n"); 10583 goto disconnect; 10584 } 10585 10586 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10587 add_links_data->link[link_id].bss)) 10588 goto disconnect; 10589 10590 if (!ieee80211_assoc_config_link(link, link_sta, 10591 add_links_data->link[link_id].bss, 10592 mgmt, pos, len, 10593 &changed)) 10594 goto disconnect; 10595 10596 /* The AP MLD indicated success for this link, but the station 10597 * profile status indicated otherwise. Since there is an 10598 * inconsistency in the ML reconfiguration response, disconnect 10599 */ 10600 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10601 goto disconnect; 10602 10603 if (ieee80211_sta_activate_link(sta, link_id)) 10604 goto disconnect; 10605 10606 changed |= ieee80211_link_set_associated(link, cbss); 10607 ieee80211_link_info_change_notify(sdata, link, changed); 10608 10609 ieee80211_recalc_smps(sdata, link); 10610 link_mask |= BIT(link_id); 10611 } 10612 10613 sdata_info(sdata, 10614 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10615 valid_links, link_mask); 10616 10617 /* links might have changed due to rejected ones, set them again */ 10618 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10619 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10620 10621 ieee80211_recalc_ps(local); 10622 ieee80211_recalc_ps_vif(sdata); 10623 10624 done_data.buf = (const u8 *)mgmt; 10625 done_data.len = orig_len; 10626 done_data.added_links = link_mask; 10627 10628 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10629 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10630 done_data.links[link_id].addr = 10631 add_links_data->link[link_id].addr; 10632 } 10633 10634 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10635 kfree(sdata->u.mgd.reconf.add_links_data); 10636 sdata->u.mgd.reconf.add_links_data = NULL; 10637 out: 10638 ieee80211_ml_reconf_reset(sdata); 10639 return; 10640 10641 disconnect: 10642 __ieee80211_disconnect(sdata); 10643 } 10644 10645 static struct sk_buff * 10646 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10647 struct ieee80211_mgd_assoc_data *add_links_data, 10648 u16 removed_links, __le16 ext_mld_capa_ops) 10649 { 10650 struct ieee80211_local *local = sdata->local; 10651 struct ieee80211_mgmt *mgmt; 10652 struct ieee80211_multi_link_elem *ml_elem; 10653 struct ieee80211_mle_basic_common_info *common; 10654 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10655 struct sk_buff *skb; 10656 size_t size; 10657 unsigned int link_id; 10658 __le16 eml_capa = 0, mld_capa_ops = 0; 10659 struct ieee80211_tx_info *info; 10660 u8 common_size, var_common_size; 10661 u8 *ml_elem_len; 10662 u16 capab = 0; 10663 10664 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10665 10666 /* Consider the maximal length of the reconfiguration ML element */ 10667 size += sizeof(struct ieee80211_multi_link_elem); 10668 10669 /* The Basic ML element and the Reconfiguration ML element have the same 10670 * fixed common information fields in the context of ML reconfiguration 10671 * action frame. The AP MLD MAC address must always be present 10672 */ 10673 common_size = sizeof(*common); 10674 10675 /* when adding links, the MLD capabilities must be present */ 10676 var_common_size = 0; 10677 if (add_links_data) { 10678 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10679 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10680 ieee80211_vif_type_p2p(&sdata->vif)); 10681 10682 if (ift_ext_capa) { 10683 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10684 mld_capa_ops = 10685 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10686 } 10687 10688 /* MLD capabilities and operation */ 10689 var_common_size += 2; 10690 10691 /* EML capabilities */ 10692 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10693 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10694 var_common_size += 2; 10695 } 10696 10697 if (ext_mld_capa_ops) 10698 var_common_size += 2; 10699 10700 /* Add the common information length */ 10701 size += common_size + var_common_size; 10702 10703 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10704 struct cfg80211_bss *cbss; 10705 size_t elems_len; 10706 10707 if (removed_links & BIT(link_id)) { 10708 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10709 ETH_ALEN; 10710 continue; 10711 } 10712 10713 if (!add_links_data || !add_links_data->link[link_id].bss) 10714 continue; 10715 10716 elems_len = add_links_data->link[link_id].elems_len; 10717 cbss = add_links_data->link[link_id].bss; 10718 10719 /* should be the same across all BSSes */ 10720 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10721 capab |= WLAN_CAPABILITY_PRIVACY; 10722 10723 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10724 ETH_ALEN; 10725 10726 /* WMM */ 10727 size += 9; 10728 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10729 elems_len); 10730 } 10731 10732 skb = alloc_skb(size, GFP_KERNEL); 10733 if (!skb) 10734 return NULL; 10735 10736 skb_reserve(skb, local->hw.extra_tx_headroom); 10737 mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE(ml_reconf_req)); 10738 10739 /* Add the MAC header */ 10740 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10741 IEEE80211_STYPE_ACTION); 10742 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10743 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10744 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10745 10746 /* Add the action frame fixed fields */ 10747 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10748 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10749 10750 /* allocate a dialog token and store it */ 10751 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10752 mgmt->u.action.ml_reconf_req.dialog_token = 10753 sdata->u.mgd.reconf.dialog_token; 10754 10755 /* Add the ML reconfiguration element and the common information */ 10756 skb_put_u8(skb, WLAN_EID_EXTENSION); 10757 ml_elem_len = skb_put(skb, 1); 10758 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10759 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10760 ml_elem->control = 10761 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10762 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10763 common = skb_put(skb, common_size); 10764 common->len = common_size + var_common_size; 10765 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10766 10767 if (add_links_data) { 10768 if (eml_capa & 10769 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10770 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10771 ml_elem->control |= 10772 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10773 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10774 } 10775 10776 ml_elem->control |= 10777 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10778 10779 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10780 } 10781 10782 if (ext_mld_capa_ops) { 10783 ml_elem->control |= 10784 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10785 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10786 } 10787 10788 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10789 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10790 10791 /* Add the per station profile */ 10792 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10793 u8 *subelem_len = NULL; 10794 u16 ctrl; 10795 const u8 *addr; 10796 10797 /* Skip links that are not changing */ 10798 if (!(removed_links & BIT(link_id)) && 10799 (!add_links_data || !add_links_data->link[link_id].bss)) 10800 continue; 10801 10802 ctrl = link_id | 10803 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10804 10805 if (removed_links & BIT(link_id)) { 10806 struct ieee80211_bss_conf *conf = 10807 sdata_dereference(sdata->vif.link_conf[link_id], 10808 sdata); 10809 if (!conf) 10810 continue; 10811 10812 addr = conf->addr; 10813 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10814 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10815 } else { 10816 addr = add_links_data->link[link_id].addr; 10817 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10818 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10819 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10820 } 10821 10822 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10823 subelem_len = skb_put(skb, 1); 10824 10825 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10826 skb_put_u8(skb, 1 + ETH_ALEN); 10827 skb_put_data(skb, addr, ETH_ALEN); 10828 10829 if (!(removed_links & BIT(link_id))) { 10830 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10831 size_t extra_used; 10832 void *capab_pos; 10833 u8 qos_info; 10834 10835 capab_pos = skb_put(skb, 2); 10836 10837 extra_used = 10838 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10839 add_links_data->link[link_id].elems, 10840 add_links_data->link[link_id].elems_len, 10841 link_id, NULL, 10842 link_present_elems, 10843 add_links_data); 10844 10845 if (add_links_data->link[link_id].elems) 10846 skb_put_data(skb, 10847 add_links_data->link[link_id].elems + 10848 extra_used, 10849 add_links_data->link[link_id].elems_len - 10850 extra_used); 10851 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10852 qos_info = sdata->u.mgd.uapsd_queues; 10853 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10854 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10855 } else { 10856 qos_info = 0; 10857 } 10858 10859 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10860 put_unaligned_le16(capab, capab_pos); 10861 } 10862 10863 ieee80211_fragment_element(skb, subelem_len, 10864 IEEE80211_MLE_SUBELEM_FRAGMENT); 10865 } 10866 10867 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10868 10869 info = IEEE80211_SKB_CB(skb); 10870 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10871 10872 return skb; 10873 } 10874 10875 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10876 struct cfg80211_ml_reconf_req *req) 10877 { 10878 const struct wiphy_iftype_ext_capab *ift_ext_capa; 10879 struct ieee80211_local *local = sdata->local; 10880 struct ieee80211_mgd_assoc_data *data = NULL; 10881 struct sta_info *sta; 10882 struct sk_buff *skb; 10883 u16 added_links, new_valid_links; 10884 u16 driver_ext_mld_capa_ops = 0; 10885 int link_id, err; 10886 10887 if (!ieee80211_vif_is_mld(&sdata->vif) || 10888 !(sdata->vif.cfg.mld_capa_op & 10889 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10890 return -EINVAL; 10891 10892 /* No support for concurrent ML reconfiguration operation */ 10893 if (sdata->u.mgd.reconf.added_links || 10894 sdata->u.mgd.reconf.removed_links) 10895 return -EBUSY; 10896 10897 added_links = 0; 10898 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10899 if (!req->add_links[link_id].bss) 10900 continue; 10901 10902 added_links |= BIT(link_id); 10903 } 10904 10905 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10906 if (WARN_ON(!sta)) 10907 return -ENOLINK; 10908 10909 /* Adding links to the set of valid link is done only after a successful 10910 * ML reconfiguration frame exchange. Here prepare the data for the ML 10911 * reconfiguration frame construction and allocate the required 10912 * resources 10913 */ 10914 if (added_links) { 10915 bool uapsd_supported; 10916 10917 data = kzalloc_obj(*data); 10918 if (!data) 10919 return -ENOMEM; 10920 10921 data->assoc_link_id = -1; 10922 data->wmm = true; 10923 10924 uapsd_supported = true; 10925 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10926 link_id++) { 10927 struct ieee80211_supported_band *sband; 10928 struct cfg80211_bss *link_cbss = 10929 req->add_links[link_id].bss; 10930 struct ieee80211_bss *bss; 10931 10932 if (!link_cbss) 10933 continue; 10934 10935 bss = (void *)link_cbss->priv; 10936 10937 if (!bss->wmm_used) { 10938 err = -EINVAL; 10939 goto err_free; 10940 } 10941 10942 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10943 err = -EINVAL; 10944 goto err_free; 10945 } 10946 10947 eth_random_addr(data->link[link_id].addr); 10948 data->link[link_id].conn = 10949 ieee80211_conn_settings_unlimited; 10950 sband = 10951 local->hw.wiphy->bands[link_cbss->channel->band]; 10952 10953 ieee80211_determine_our_sta_mode(sdata, sband, 10954 NULL, true, link_id, 10955 &data->link[link_id].conn); 10956 10957 data->link[link_id].bss = link_cbss; 10958 data->link[link_id].elems = 10959 (u8 *)req->add_links[link_id].elems; 10960 data->link[link_id].elems_len = 10961 req->add_links[link_id].elems_len; 10962 10963 if (!bss->uapsd_supported) 10964 uapsd_supported = false; 10965 10966 if (data->link[link_id].conn.mode < 10967 IEEE80211_CONN_MODE_EHT) { 10968 err = -EINVAL; 10969 goto err_free; 10970 } 10971 10972 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10973 link_id); 10974 if (err) { 10975 err = -EINVAL; 10976 goto err_free; 10977 } 10978 } 10979 10980 /* Require U-APSD support if we enabled it */ 10981 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10982 !uapsd_supported) { 10983 err = -EINVAL; 10984 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10985 goto err_free; 10986 } 10987 10988 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10989 link_id++) { 10990 if (!data->link[link_id].bss) 10991 continue; 10992 10993 /* only used to verify the mode, nothing is allocated */ 10994 err = ieee80211_prep_channel(sdata, NULL, link_id, 10995 data->link[link_id].bss, 10996 true, 10997 &data->link[link_id].conn, 10998 sdata->u.mgd.userspace_selectors); 10999 if (err) 11000 goto err_free; 11001 } 11002 } 11003 11004 /* link removal is done before the ML reconfiguration frame exchange so 11005 * that these links will not be used between their removal by the AP MLD 11006 * and before the station got the ML reconfiguration response. Based on 11007 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 11008 * link removal request. 11009 */ 11010 if (req->rem_links) { 11011 u16 new_active_links = 11012 sdata->vif.active_links & ~req->rem_links; 11013 11014 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 11015 11016 /* Should not be left with no valid links to perform the 11017 * ML reconfiguration 11018 */ 11019 if (!new_valid_links || 11020 !(new_valid_links & ~sdata->vif.dormant_links)) { 11021 sdata_info(sdata, "mlo: reconf: no valid links\n"); 11022 err = -EINVAL; 11023 goto err_free; 11024 } 11025 11026 if (new_active_links != sdata->vif.active_links) { 11027 if (!new_active_links) 11028 new_active_links = 11029 BIT(__ffs(new_valid_links & 11030 ~sdata->vif.dormant_links)); 11031 11032 err = ieee80211_set_active_links(&sdata->vif, 11033 new_active_links); 11034 if (err) { 11035 sdata_info(sdata, 11036 "mlo: reconf: failed set active links\n"); 11037 goto err_free; 11038 } 11039 } 11040 } 11041 11042 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 11043 ieee80211_vif_type_p2p(&sdata->vif)); 11044 if (ift_ext_capa) 11045 driver_ext_mld_capa_ops = ift_ext_capa->ext_mld_capa_and_ops; 11046 11047 /* Build the SKB before the link removal as the construction of the 11048 * station info for removed links requires the local address. 11049 * Invalidate the removed links, so that the transmission of the ML 11050 * reconfiguration request frame would not be done using them, as the AP 11051 * is expected to send the ML reconfiguration response frame on the link 11052 * on which the request was received. 11053 */ 11054 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 11055 cpu_to_le16(req->ext_mld_capa_ops | 11056 driver_ext_mld_capa_ops)); 11057 if (!skb) { 11058 err = -ENOMEM; 11059 goto err_free; 11060 } 11061 11062 if (req->rem_links) { 11063 u16 new_dormant_links = 11064 sdata->vif.dormant_links & ~req->rem_links; 11065 11066 err = ieee80211_vif_set_links(sdata, new_valid_links, 11067 new_dormant_links); 11068 if (err) { 11069 sdata_info(sdata, 11070 "mlo: reconf: failed set valid links\n"); 11071 kfree_skb(skb); 11072 goto err_free; 11073 } 11074 11075 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11076 link_id++) { 11077 if (!(req->rem_links & BIT(link_id))) 11078 continue; 11079 11080 ieee80211_sta_remove_link(sta, link_id); 11081 } 11082 11083 /* notify the driver and upper layers */ 11084 ieee80211_vif_cfg_change_notify(sdata, 11085 BSS_CHANGED_MLD_VALID_LINKS); 11086 cfg80211_links_removed(sdata->dev, req->rem_links); 11087 } 11088 11089 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 11090 added_links, req->rem_links); 11091 11092 ieee80211_tx_skb(sdata, skb); 11093 11094 sdata->u.mgd.reconf.added_links = added_links; 11095 sdata->u.mgd.reconf.add_links_data = data; 11096 sdata->u.mgd.reconf.removed_links = req->rem_links; 11097 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 11098 &sdata->u.mgd.reconf.wk, 11099 IEEE80211_ASSOC_TIMEOUT_SHORT); 11100 return 0; 11101 11102 err_free: 11103 kfree(data); 11104 return err; 11105 } 11106 11107 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 11108 { 11109 unsigned long valid_links = sdata->vif.valid_links; 11110 u8 link_id; 11111 11112 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11113 11114 if (!ieee80211_vif_is_mld(&sdata->vif)) 11115 return false; 11116 11117 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 11118 struct ieee80211_bss_conf *bss_conf = 11119 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 11120 11121 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 11122 return false; 11123 } 11124 11125 return true; 11126 } 11127 11128 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 11129 { 11130 int frame_len = IEEE80211_MIN_ACTION_SIZE(epcs) + (enable ? 1 : 0); 11131 struct ieee80211_local *local = sdata->local; 11132 struct ieee80211_mgmt *mgmt; 11133 struct sk_buff *skb; 11134 11135 if (!ieee80211_mgd_epcs_supp(sdata)) 11136 return -EINVAL; 11137 11138 if (sdata->u.mgd.epcs.enabled == enable && 11139 !sdata->u.mgd.epcs.dialog_token) 11140 return 0; 11141 11142 /* Do not allow enabling EPCS if the AP didn't respond yet. 11143 * However, allow disabling EPCS in such a case. 11144 */ 11145 if (sdata->u.mgd.epcs.dialog_token && enable) 11146 return -EALREADY; 11147 11148 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 11149 if (!skb) 11150 return -ENOBUFS; 11151 11152 skb_reserve(skb, local->hw.extra_tx_headroom); 11153 mgmt = skb_put_zero(skb, frame_len); 11154 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 11155 IEEE80211_STYPE_ACTION); 11156 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 11157 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 11158 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 11159 11160 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 11161 if (enable) { 11162 u8 *pos = mgmt->u.action.epcs.variable; 11163 11164 mgmt->u.action.action_code = 11165 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 11166 11167 *pos = ++sdata->u.mgd.dialog_token_alloc; 11168 sdata->u.mgd.epcs.dialog_token = *pos; 11169 } else { 11170 mgmt->u.action.action_code = 11171 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 11172 11173 ieee80211_epcs_teardown(sdata); 11174 ieee80211_epcs_changed(sdata, false); 11175 } 11176 11177 ieee80211_tx_skb(sdata, skb); 11178 return 0; 11179 } 11180 11181 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 11182 struct ieee802_11_elems *elems) 11183 { 11184 const struct element *sub; 11185 size_t scratch_len = elems->ml_epcs_len; 11186 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 11187 11188 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11189 11190 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 11191 return; 11192 11193 if (WARN_ON(!scratch)) 11194 return; 11195 11196 /* Directly parse the sub elements as the common information doesn't 11197 * hold any useful information. 11198 */ 11199 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 11200 elems->ml_epcs_len) { 11201 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 11202 struct ieee80211_link_data *link; 11203 u8 *pos = (void *)sub->data; 11204 u16 control; 11205 ssize_t len; 11206 u8 link_id; 11207 11208 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 11209 continue; 11210 11211 if (sub->datalen < sizeof(control)) 11212 break; 11213 11214 control = get_unaligned_le16(pos); 11215 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 11216 11217 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 11218 continue; 11219 11220 link = sdata_dereference(sdata->link[link_id], sdata); 11221 if (!link) 11222 continue; 11223 11224 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 11225 elems->ml_epcs_len, 11226 scratch, scratch_len, 11227 IEEE80211_MLE_SUBELEM_FRAGMENT); 11228 if (len < (ssize_t)sizeof(control)) 11229 continue; 11230 11231 pos = scratch + sizeof(control); 11232 len -= sizeof(control); 11233 11234 link_elems = ieee802_11_parse_elems(pos, len, 11235 IEEE80211_FTYPE_MGMT | 11236 IEEE80211_STYPE_ACTION, 11237 NULL); 11238 if (!link_elems) 11239 continue; 11240 11241 if (ieee80211_sta_wmm_params(sdata->local, link, 11242 link_elems->wmm_param, 11243 link_elems->wmm_param_len, 11244 link_elems->mu_edca_param_set)) 11245 ieee80211_link_info_change_notify(sdata, link, 11246 BSS_CHANGED_QOS); 11247 } 11248 } 11249 11250 static void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11251 struct ieee80211_mgmt *mgmt, 11252 size_t len) 11253 { 11254 struct ieee802_11_elems *elems __free(kfree) = NULL; 11255 size_t ies_len; 11256 u16 status_code; 11257 u8 *pos, dialog_token; 11258 11259 if (!ieee80211_mgd_epcs_supp(sdata)) 11260 return; 11261 11262 /* Handle dialog token and status code */ 11263 pos = mgmt->u.action.epcs.variable; 11264 dialog_token = *pos; 11265 status_code = get_unaligned_le16(pos + 1); 11266 11267 /* An EPCS enable response with dialog token == 0 is an unsolicited 11268 * notification from the AP MLD. In such a case, EPCS should already be 11269 * enabled and status must be success 11270 */ 11271 if (!dialog_token && 11272 (!sdata->u.mgd.epcs.enabled || 11273 status_code != WLAN_STATUS_SUCCESS)) 11274 return; 11275 11276 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11277 return; 11278 11279 sdata->u.mgd.epcs.dialog_token = 0; 11280 11281 if (status_code != WLAN_STATUS_SUCCESS) 11282 return; 11283 11284 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11285 ies_len = len - IEEE80211_MIN_ACTION_SIZE(epcs) - 11286 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11287 11288 elems = ieee802_11_parse_elems(pos, ies_len, 11289 IEEE80211_FTYPE_MGMT | 11290 IEEE80211_STYPE_ACTION, 11291 NULL); 11292 if (!elems) 11293 return; 11294 11295 ieee80211_ml_epcs(sdata, elems); 11296 ieee80211_epcs_changed(sdata, true); 11297 } 11298 11299 static void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11300 struct ieee80211_mgmt *mgmt, 11301 size_t len) 11302 { 11303 if (!ieee80211_vif_is_mld(&sdata->vif) || 11304 !sdata->u.mgd.epcs.enabled) 11305 return; 11306 11307 ieee80211_epcs_teardown(sdata); 11308 ieee80211_epcs_changed(sdata, false); 11309 } 11310 11311 void ieee80211_sta_rx_queued_frame(struct ieee80211_sub_if_data *sdata, 11312 struct sk_buff *skb) 11313 { 11314 struct ieee80211_link_data *link = &sdata->deflink; 11315 struct ieee80211_rx_status *rx_status; 11316 struct ieee802_11_elems *elems; 11317 struct ieee80211_mgmt *mgmt; 11318 u16 fc; 11319 int ies_len; 11320 11321 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11322 11323 mgmt = (struct ieee80211_mgmt *) skb->data; 11324 11325 if (ieee80211_is_ext(mgmt->frame_control)) { 11326 ieee80211_sta_rx_queued_ext(sdata, skb); 11327 return; 11328 } 11329 11330 rx_status = (struct ieee80211_rx_status *) skb->cb; 11331 fc = le16_to_cpu(mgmt->frame_control); 11332 11333 if (rx_status->link_valid) { 11334 link = sdata_dereference(sdata->link[rx_status->link_id], 11335 sdata); 11336 if (!link) 11337 return; 11338 } 11339 11340 switch (fc & IEEE80211_FCTL_STYPE) { 11341 case IEEE80211_STYPE_BEACON: 11342 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 11343 skb->len, rx_status); 11344 break; 11345 case IEEE80211_STYPE_PROBE_RESP: 11346 ieee80211_rx_mgmt_probe_resp(link, skb); 11347 break; 11348 case IEEE80211_STYPE_AUTH: 11349 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 11350 break; 11351 case IEEE80211_STYPE_DEAUTH: 11352 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 11353 break; 11354 case IEEE80211_STYPE_DISASSOC: 11355 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 11356 break; 11357 case IEEE80211_STYPE_ASSOC_RESP: 11358 case IEEE80211_STYPE_REASSOC_RESP: 11359 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 11360 break; 11361 case IEEE80211_STYPE_ACTION: 11362 if (!sdata->u.mgd.associated || 11363 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 11364 break; 11365 11366 switch (mgmt->u.action.category) { 11367 case WLAN_CATEGORY_SPECTRUM_MGMT: 11368 ies_len = skb->len - 11369 offsetof(struct ieee80211_mgmt, 11370 u.action.chan_switch.variable); 11371 11372 if (ies_len < 0) 11373 break; 11374 11375 /* CSA IE cannot be overridden, no need for BSSID */ 11376 elems = ieee802_11_parse_elems(mgmt->u.action.chan_switch.variable, 11377 ies_len, 11378 IEEE80211_FTYPE_MGMT | 11379 IEEE80211_STYPE_ACTION, 11380 NULL); 11381 11382 if (elems && !elems->parse_error) { 11383 enum ieee80211_csa_source src = 11384 IEEE80211_CSA_SOURCE_PROT_ACTION; 11385 11386 ieee80211_sta_process_chanswitch(link, 11387 rx_status->mactime, 11388 rx_status->device_timestamp, 11389 elems, elems, 11390 src); 11391 } 11392 kfree(elems); 11393 break; 11394 case WLAN_CATEGORY_PUBLIC: 11395 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 11396 ies_len = skb->len - 11397 offsetof(struct ieee80211_mgmt, 11398 u.action.ext_chan_switch.variable); 11399 11400 if (ies_len < 0) 11401 break; 11402 11403 /* 11404 * extended CSA IE can't be overridden, no need for 11405 * BSSID 11406 */ 11407 elems = ieee802_11_parse_elems(mgmt->u.action.ext_chan_switch.variable, 11408 ies_len, 11409 IEEE80211_FTYPE_MGMT | 11410 IEEE80211_STYPE_ACTION, 11411 NULL); 11412 11413 if (elems && !elems->parse_error) { 11414 enum ieee80211_csa_source src; 11415 11416 if (mgmt->u.action.category == 11417 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 11418 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 11419 else 11420 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 11421 11422 /* for the handling code pretend it was an IE */ 11423 elems->ext_chansw_ie = 11424 &mgmt->u.action.ext_chan_switch.data; 11425 11426 ieee80211_sta_process_chanswitch(link, 11427 rx_status->mactime, 11428 rx_status->device_timestamp, 11429 elems, elems, 11430 src); 11431 } 11432 11433 kfree(elems); 11434 break; 11435 case WLAN_CATEGORY_PROTECTED_EHT: 11436 switch (mgmt->u.action.action_code) { 11437 case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ: 11438 ieee80211_process_neg_ttlm_req(sdata, mgmt, 11439 skb->len); 11440 break; 11441 case WLAN_PROTECTED_EHT_ACTION_TTLM_RES: 11442 ieee80211_process_neg_ttlm_res(sdata, mgmt, 11443 skb->len); 11444 break; 11445 case WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN: 11446 ieee80211_process_ttlm_teardown(sdata); 11447 break; 11448 case WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_RESP: 11449 ieee80211_process_ml_reconf_resp(sdata, mgmt, 11450 skb->len); 11451 break; 11452 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_RESP: 11453 ieee80211_process_epcs_ena_resp(sdata, mgmt, 11454 skb->len); 11455 break; 11456 case WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN: 11457 ieee80211_process_epcs_teardown(sdata, mgmt, 11458 skb->len); 11459 break; 11460 default: 11461 break; 11462 } 11463 break; 11464 } 11465 break; 11466 } 11467 } 11468