1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2026 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS (100 * USEC_PER_MSEC) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 const struct ieee80211_uhr_operation *uhr_oper = elems->uhr_operation; 166 struct ieee80211_supported_band *sband = 167 sdata->local->hw.wiphy->bands[channel->band]; 168 struct cfg80211_chan_def vht_chandef; 169 bool no_vht = false; 170 u32 ht_cfreq; 171 172 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 173 ignore_ht_channel_mismatch = false; 174 175 *chandef = (struct cfg80211_chan_def) { 176 .chan = channel, 177 .width = NL80211_CHAN_WIDTH_20_NOHT, 178 .center_freq1 = channel->center_freq, 179 .freq1_offset = channel->freq_offset, 180 }; 181 182 /* get special S1G case out of the way */ 183 if (sband->band == NL80211_BAND_S1GHZ) { 184 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 185 chandef)) { 186 /* Fallback to default 1MHz */ 187 chandef->width = NL80211_CHAN_WIDTH_1; 188 chandef->s1g_primary_2mhz = false; 189 } 190 191 return IEEE80211_CONN_MODE_S1G; 192 } 193 194 /* get special 6 GHz case out of the way */ 195 if (sband->band == NL80211_BAND_6GHZ) { 196 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_HIGHEST; 197 198 /* this is an error */ 199 if (conn->mode < IEEE80211_CONN_MODE_HE) 200 return IEEE80211_CONN_MODE_LEGACY; 201 202 if (!elems->he_6ghz_capa || !elems->he_cap) { 203 sdata_info(sdata, 204 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 205 return IEEE80211_CONN_MODE_LEGACY; 206 } 207 208 if (!eht_oper || !elems->eht_cap) { 209 eht_oper = NULL; 210 mode = IEEE80211_CONN_MODE_HE; 211 } 212 213 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 214 eht_oper, chandef)) { 215 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 216 return IEEE80211_CONN_MODE_LEGACY; 217 } 218 219 if (eht_oper && ieee80211_hw_check(&sdata->local->hw, STRICT)) { 220 struct cfg80211_chan_def he_chandef = *chandef; 221 222 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, 223 he_oper, NULL, 224 &he_chandef)) { 225 sdata_info(sdata, 226 "bad HE operation in EHT AP\n"); 227 return IEEE80211_CONN_MODE_LEGACY; 228 } 229 230 if (!cfg80211_chandef_compatible(chandef, 231 &he_chandef)) { 232 sdata_info(sdata, "HE/EHT incompatible\n"); 233 return IEEE80211_CONN_MODE_LEGACY; 234 } 235 } 236 237 if (mode <= IEEE80211_CONN_MODE_EHT) 238 return mode; 239 goto check_uhr; 240 } 241 242 /* now we have the progression HT, VHT, ... */ 243 if (conn->mode < IEEE80211_CONN_MODE_HT) 244 return IEEE80211_CONN_MODE_LEGACY; 245 246 if (!ht_oper || !elems->ht_cap_elem) 247 return IEEE80211_CONN_MODE_LEGACY; 248 249 chandef->width = NL80211_CHAN_WIDTH_20; 250 251 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 252 channel->band); 253 /* check that channel matches the right operating channel */ 254 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 255 /* 256 * It's possible that some APs are confused here; 257 * Netgear WNDR3700 sometimes reports 4 higher than 258 * the actual channel in association responses, but 259 * since we look at probe response/beacon data here 260 * it should be OK. 261 */ 262 sdata_info(sdata, 263 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 264 channel->center_freq, ht_cfreq, 265 ht_oper->primary_chan, channel->band); 266 return IEEE80211_CONN_MODE_LEGACY; 267 } 268 269 ieee80211_chandef_ht_oper(ht_oper, chandef); 270 271 if (conn->mode < IEEE80211_CONN_MODE_VHT) 272 return IEEE80211_CONN_MODE_HT; 273 274 vht_chandef = *chandef; 275 276 /* 277 * having he_cap/he_oper parsed out implies we're at 278 * least operating as HE STA 279 */ 280 if (elems->he_cap && he_oper && 281 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 282 struct ieee80211_vht_operation he_oper_vht_cap; 283 284 /* 285 * Set only first 3 bytes (other 2 aren't used in 286 * ieee80211_chandef_vht_oper() anyway) 287 */ 288 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 289 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 290 291 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 292 &he_oper_vht_cap, ht_oper, 293 &vht_chandef)) { 294 sdata_info(sdata, 295 "HE AP VHT information is invalid, disabling HE\n"); 296 /* this will cause us to re-parse as VHT STA */ 297 return IEEE80211_CONN_MODE_VHT; 298 } 299 } else if (!vht_oper || !elems->vht_cap_elem) { 300 if (sband->band == NL80211_BAND_5GHZ) 301 return IEEE80211_CONN_MODE_HT; 302 no_vht = true; 303 } else if (sband->band == NL80211_BAND_2GHZ) { 304 no_vht = true; 305 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 306 vht_cap_info, 307 vht_oper, ht_oper, 308 &vht_chandef)) { 309 sdata_info(sdata, 310 "AP VHT information is invalid, disabling VHT\n"); 311 return IEEE80211_CONN_MODE_HT; 312 } 313 314 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 315 sdata_info(sdata, 316 "AP VHT information doesn't match HT, disabling VHT\n"); 317 return IEEE80211_CONN_MODE_HT; 318 } 319 320 *chandef = vht_chandef; 321 322 /* stick to current max mode if we or the AP don't have HE */ 323 if (conn->mode < IEEE80211_CONN_MODE_HE || 324 !elems->he_operation || !elems->he_cap) { 325 if (no_vht) 326 return IEEE80211_CONN_MODE_HT; 327 return IEEE80211_CONN_MODE_VHT; 328 } 329 330 /* stick to HE if we or the AP don't have EHT */ 331 if (conn->mode < IEEE80211_CONN_MODE_EHT || 332 !eht_oper || !elems->eht_cap) 333 return IEEE80211_CONN_MODE_HE; 334 335 /* 336 * handle the case that the EHT operation indicates that it holds EHT 337 * operation information (in case that the channel width differs from 338 * the channel width reported in HT/VHT/HE). 339 */ 340 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 341 struct cfg80211_chan_def eht_chandef = *chandef; 342 343 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 344 &eht_chandef); 345 346 eht_chandef.punctured = 347 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 348 349 if (!cfg80211_chandef_valid(&eht_chandef)) { 350 sdata_info(sdata, 351 "AP EHT information is invalid, disabling EHT\n"); 352 return IEEE80211_CONN_MODE_HE; 353 } 354 355 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 356 sdata_info(sdata, 357 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 358 return IEEE80211_CONN_MODE_HE; 359 } 360 361 *chandef = eht_chandef; 362 } 363 364 check_uhr: 365 if (conn->mode < IEEE80211_CONN_MODE_UHR || !uhr_oper) 366 return IEEE80211_CONN_MODE_EHT; 367 368 /* 369 * In beacons we don't have all the data - but we know the size was OK, 370 * so if the size is valid as a non-beacon case, we have more data and 371 * can validate the NPCA parameters. 372 */ 373 if (ieee80211_uhr_oper_size_ok((const void *)uhr_oper, 374 elems->uhr_operation_len, 375 false)) { 376 struct cfg80211_chan_def npca_chandef = *chandef; 377 const struct ieee80211_uhr_npca_info *npca; 378 const __le16 *dis_subch_bmap; 379 u16 punct = chandef->punctured, npca_punct; 380 381 npca = ieee80211_uhr_npca_info(uhr_oper); 382 if (npca) { 383 int width = cfg80211_chandef_get_width(chandef); 384 u8 offs = le32_get_bits(npca->params, 385 IEEE80211_UHR_NPCA_PARAMS_PRIMARY_CHAN_OFFS); 386 u32 cf1 = chandef->center_freq1; 387 bool pri_upper, npca_upper; 388 389 pri_upper = chandef->chan->center_freq > cf1; 390 npca_upper = 20 * offs >= width / 2; 391 392 if (20 * offs >= cfg80211_chandef_get_width(chandef) || 393 pri_upper == npca_upper) { 394 sdata_info(sdata, 395 "AP UHR NPCA primary channel invalid, disabling UHR\n"); 396 return IEEE80211_CONN_MODE_EHT; 397 } 398 } 399 400 dis_subch_bmap = ieee80211_uhr_npca_dis_subch_bitmap(uhr_oper); 401 402 if (dis_subch_bmap) { 403 npca_punct = get_unaligned_le16(dis_subch_bmap); 404 npca_chandef.punctured = npca_punct; 405 } 406 407 /* 408 * must be a valid puncturing pattern for this channel as 409 * well as puncturing all subchannels that are already in 410 * the disabled subchannel bitmap on the primary channel 411 */ 412 if (!cfg80211_chandef_valid(&npca_chandef) || 413 ((punct & npca_punct) != punct)) { 414 sdata_info(sdata, 415 "AP UHR NPCA disabled subchannel bitmap invalid, disabling UHR\n"); 416 return IEEE80211_CONN_MODE_EHT; 417 } 418 } 419 420 return IEEE80211_CONN_MODE_UHR; 421 } 422 423 static bool 424 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 425 struct ieee80211_supported_band *sband, 426 const struct ieee80211_ht_operation *ht_op) 427 { 428 struct ieee80211_sta_ht_cap sta_ht_cap; 429 int i; 430 431 if (sband->band == NL80211_BAND_6GHZ) 432 return true; 433 434 if (!ht_op) 435 return false; 436 437 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 438 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 439 440 /* 441 * Some Xfinity XB8 firmware advertises >1 spatial stream MCS indexes in 442 * their basic HT-MCS set. On cards with lower spatial streams, the check 443 * would fail, and we'd be stuck with no HT when it in fact work fine with 444 * its own supported rate. So check it only in strict mode. 445 */ 446 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 447 return true; 448 449 /* 450 * P802.11REVme/D7.0 - 6.5.4.2.4 451 * ... 452 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 453 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 454 * in the HT Operation parameter that contains any unsupported MCSs, 455 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 456 * contain a ResultCode parameter that is not set to the value SUCCESS. 457 * ... 458 */ 459 460 /* Simply check that all basic rates are in the STA RX mask */ 461 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 462 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 463 ht_op->basic_set[i]) 464 return false; 465 } 466 467 return true; 468 } 469 470 static bool 471 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 472 int link_id, 473 struct ieee80211_supported_band *sband, 474 const struct ieee80211_vht_operation *vht_op) 475 { 476 struct ieee80211_sta_vht_cap sta_vht_cap; 477 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 478 int nss; 479 480 if (sband->band != NL80211_BAND_5GHZ) 481 return true; 482 483 if (!vht_op) 484 return false; 485 486 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 487 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 488 489 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 490 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 491 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 492 493 /* 494 * Many APs are incorrectly advertising an all-zero value here, 495 * which really means MCS 0-7 are required for 1-8 streams, but 496 * they don't really mean it that way. 497 * Some other APs are incorrectly advertising 3 spatial streams 498 * with MCS 0-7 are required, but don't really mean it that way 499 * and we'll connect only with HT, rather than even HE. 500 * As a result, unfortunately the VHT basic MCS/NSS set cannot 501 * be used at all, so check it only in strict mode. 502 */ 503 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 504 return true; 505 506 /* 507 * P802.11REVme/D7.0 - 6.5.4.2.4 508 * ... 509 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 510 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 511 * field in the VHT Operation parameter that contains any unsupported 512 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 513 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 514 * that is not set to the value SUCCESS. 515 * ... 516 */ 517 for (nss = 8; nss > 0; nss--) { 518 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 519 u8 sta_rx_val; 520 u8 sta_tx_val; 521 522 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 523 continue; 524 525 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 526 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 527 528 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 529 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 530 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 531 link_id_info(sdata, link_id, 532 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 533 nss, sta_rx_val, sta_tx_val, ap_op_val); 534 return false; 535 } 536 } 537 538 return true; 539 } 540 541 static bool 542 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 543 int link_id, 544 const struct ieee80211_he_cap_elem *he_cap, 545 const struct ieee80211_he_operation *he_op) 546 { 547 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 548 u16 mcs_80_map_tx, mcs_80_map_rx; 549 u16 ap_min_req_set; 550 int nss; 551 552 if (!he_cap) 553 return false; 554 555 /* mcs_nss is right after he_cap info */ 556 he_mcs_nss_supp = (void *)(he_cap + 1); 557 558 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 559 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 560 561 /* P802.11-REVme/D0.3 562 * 27.1.1 Introduction to the HE PHY 563 * ... 564 * An HE STA shall support the following features: 565 * ... 566 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 567 * supported channel widths for HE SU PPDUs 568 */ 569 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 570 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 571 link_id_info(sdata, link_id, 572 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 573 mcs_80_map_tx, mcs_80_map_rx); 574 return false; 575 } 576 577 if (!he_op) 578 return true; 579 580 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 581 582 /* 583 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 584 * zeroes, which is nonsense, and completely inconsistent with itself 585 * (it doesn't have 8 streams). Accept the settings in this case anyway. 586 */ 587 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 588 return true; 589 590 /* make sure the AP is consistent with itself 591 * 592 * P802.11-REVme/D0.3 593 * 26.17.1 Basic HE BSS operation 594 * 595 * A STA that is operating in an HE BSS shall be able to receive and 596 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 597 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 598 * MLME-START.request primitive and shall be able to receive at each of 599 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 600 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 601 * primitive 602 */ 603 for (nss = 8; nss > 0; nss--) { 604 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 605 u8 ap_rx_val; 606 u8 ap_tx_val; 607 608 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 609 continue; 610 611 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 612 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 613 614 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 615 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 616 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 617 link_id_info(sdata, link_id, 618 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 619 nss, ap_rx_val, ap_tx_val, ap_op_val); 620 return false; 621 } 622 } 623 624 return true; 625 } 626 627 static bool 628 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 629 struct ieee80211_supported_band *sband, 630 const struct ieee80211_he_operation *he_op) 631 { 632 const struct ieee80211_sta_he_cap *sta_he_cap = 633 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 634 u16 ap_min_req_set; 635 int i; 636 637 if (!sta_he_cap || !he_op) 638 return false; 639 640 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 641 642 /* 643 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 644 * zeroes, which is nonsense, and completely inconsistent with itself 645 * (it doesn't have 8 streams). Accept the settings in this case anyway. 646 */ 647 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 648 return true; 649 650 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 651 for (i = 0; i < 3; i++) { 652 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 653 &sta_he_cap->he_mcs_nss_supp; 654 u16 sta_mcs_map_rx = 655 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 656 u16 sta_mcs_map_tx = 657 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 658 u8 nss; 659 bool verified = true; 660 661 /* 662 * For each band there is a maximum of 8 spatial streams 663 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 664 * of 2 bits per NSS (1-8), with the values defined in enum 665 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 666 * capabilities aren't less than the AP's minimum requirements 667 * for this HE BSS per SS. 668 * It is enough to find one such band that meets the reqs. 669 */ 670 for (nss = 8; nss > 0; nss--) { 671 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 672 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 673 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 674 675 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 676 continue; 677 678 /* 679 * Make sure the HE AP doesn't require MCSs that aren't 680 * supported by the client as required by spec 681 * 682 * P802.11-REVme/D0.3 683 * 26.17.1 Basic HE BSS operation 684 * 685 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 686 * a BSS, unless it supports (i.e., is able to both transmit and 687 * receive using) all of the <HE-MCS, NSS> tuples in the basic 688 * HE-MCS and NSS set. 689 */ 690 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 691 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 692 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 693 verified = false; 694 break; 695 } 696 } 697 698 if (verified) 699 return true; 700 } 701 702 /* If here, STA doesn't meet AP's HE min requirements */ 703 return false; 704 } 705 706 static u8 707 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 708 const struct ieee80211_sta_eht_cap *sta_eht_cap, 709 unsigned int idx, int bw) 710 { 711 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 712 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 713 714 /* handle us being a 20 MHz-only EHT STA - with four values 715 * for MCS 0-7, 8-9, 10-11, 12-13. 716 */ 717 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 718 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 719 720 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 721 if (idx > 0) 722 idx--; 723 724 switch (bw) { 725 case 0: 726 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 727 case 1: 728 if (!(he_phy_cap0 & 729 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 730 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 731 return 0xff; /* pass check */ 732 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 733 case 2: 734 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 735 return 0xff; /* pass check */ 736 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 737 } 738 739 WARN_ON(1); 740 return 0; 741 } 742 743 static bool 744 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 745 struct ieee80211_supported_band *sband, 746 const struct ieee80211_eht_operation *eht_op) 747 { 748 const struct ieee80211_sta_he_cap *sta_he_cap = 749 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 750 const struct ieee80211_sta_eht_cap *sta_eht_cap = 751 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 752 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 753 unsigned int i; 754 755 if (!sta_he_cap || !sta_eht_cap || !eht_op) 756 return false; 757 758 req = &eht_op->basic_mcs_nss; 759 760 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 761 u8 req_rx_nss, req_tx_nss; 762 unsigned int bw; 763 764 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 765 IEEE80211_EHT_MCS_NSS_RX); 766 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 767 IEEE80211_EHT_MCS_NSS_TX); 768 769 for (bw = 0; bw < 3; bw++) { 770 u8 have, have_rx_nss, have_tx_nss; 771 772 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 773 sta_eht_cap, 774 i, bw); 775 have_rx_nss = u8_get_bits(have, 776 IEEE80211_EHT_MCS_NSS_RX); 777 have_tx_nss = u8_get_bits(have, 778 IEEE80211_EHT_MCS_NSS_TX); 779 780 if (req_rx_nss > have_rx_nss || 781 req_tx_nss > have_tx_nss) 782 return false; 783 } 784 } 785 786 return true; 787 } 788 789 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 790 const u8 *supp_rates, 791 unsigned int supp_rates_len, 792 const u8 *ext_supp_rates, 793 unsigned int ext_supp_rates_len, 794 u32 *rates, u32 *basic_rates, 795 unsigned long *unknown_rates_selectors, 796 bool *have_higher_than_11mbit, 797 int *min_rate, int *min_rate_index) 798 { 799 int i, j; 800 801 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 802 u8 supp_rate = i < supp_rates_len ? 803 supp_rates[i] : 804 ext_supp_rates[i - supp_rates_len]; 805 int rate = supp_rate & 0x7f; 806 bool is_basic = !!(supp_rate & 0x80); 807 808 if ((rate * 5) > 110 && have_higher_than_11mbit) 809 *have_higher_than_11mbit = true; 810 811 /* 812 * Skip membership selectors since they're not rates. 813 * 814 * Note: Even though the membership selector and the basic 815 * rate flag share the same bit, they are not exactly 816 * the same. 817 */ 818 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 819 if (unknown_rates_selectors) 820 set_bit(rate, unknown_rates_selectors); 821 continue; 822 } 823 824 for (j = 0; j < sband->n_bitrates; j++) { 825 struct ieee80211_rate *br; 826 int brate; 827 828 br = &sband->bitrates[j]; 829 830 brate = DIV_ROUND_UP(br->bitrate, 5); 831 if (brate == rate) { 832 if (rates) 833 *rates |= BIT(j); 834 if (is_basic && basic_rates) 835 *basic_rates |= BIT(j); 836 if (min_rate && (rate * 5) < *min_rate) { 837 *min_rate = rate * 5; 838 if (min_rate_index) 839 *min_rate_index = j; 840 } 841 break; 842 } 843 } 844 845 /* Handle an unknown entry as if it is an unknown selector */ 846 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 847 set_bit(rate, unknown_rates_selectors); 848 } 849 } 850 851 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 852 const struct cfg80211_chan_def *chandef, 853 u32 prohibited_flags) 854 { 855 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 856 chandef, prohibited_flags)) 857 return false; 858 859 if (chandef->punctured && 860 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 861 return false; 862 863 return true; 864 } 865 866 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 867 { 868 if (c->width == NL80211_CHAN_WIDTH_80P80) 869 return 4 + 4; 870 871 return cfg80211_chandef_get_width(c) / 20; 872 } 873 874 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 875 { 876 switch (c->width) { 877 case NL80211_CHAN_WIDTH_20: 878 case NL80211_CHAN_WIDTH_20_NOHT: 879 return 1; 880 case NL80211_CHAN_WIDTH_40: 881 return 2; 882 case NL80211_CHAN_WIDTH_80P80: 883 case NL80211_CHAN_WIDTH_80: 884 return 3; 885 case NL80211_CHAN_WIDTH_160: 886 return 4; 887 case NL80211_CHAN_WIDTH_320: 888 return 5; 889 default: 890 WARN_ON(1); 891 return 0; 892 } 893 } 894 895 VISIBLE_IF_MAC80211_KUNIT int 896 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 897 u8 n_partial_subchans) 898 { 899 int n = ieee80211_chandef_num_subchans(ap); 900 struct cfg80211_chan_def tmp = *ap; 901 int offset = 0; 902 903 /* 904 * Given a chandef (in this context, it's the AP's) and a number 905 * of subchannels that we want to look at ('n_partial_subchans'), 906 * calculate the offset in number of subchannels between the full 907 * and the subset with the desired width. 908 */ 909 910 /* same number of subchannels means no offset, obviously */ 911 if (n == n_partial_subchans) 912 return 0; 913 914 /* don't WARN - misconfigured APs could cause this if their N > width */ 915 if (n < n_partial_subchans) 916 return 0; 917 918 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 919 u32 prev = tmp.center_freq1; 920 921 ieee80211_chandef_downgrade(&tmp, NULL); 922 923 /* 924 * if center_freq moved up, half the original channels 925 * are gone now but were below, so increase offset 926 */ 927 if (prev < tmp.center_freq1) 928 offset += ieee80211_chandef_num_subchans(&tmp); 929 } 930 931 /* 932 * 80+80 with secondary 80 below primary - four subchannels for it 933 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 934 */ 935 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 936 ap->center_freq2 < ap->center_freq1) 937 offset += 4; 938 939 return offset; 940 } 941 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 942 943 VISIBLE_IF_MAC80211_KUNIT void 944 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 945 const struct cfg80211_chan_def *ap, 946 const struct cfg80211_chan_def *used) 947 { 948 u8 needed = ieee80211_chandef_num_subchans(used); 949 u8 have = ieee80211_chandef_num_subchans(ap); 950 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 951 u8 offset; 952 953 if (!psd->valid) 954 return; 955 956 /* if N is zero, all defaults were used, no point in rearranging */ 957 if (!psd->n) 958 goto out; 959 960 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 961 962 /* 963 * This assumes that 'N' is consistent with the HE channel, as 964 * it should be (otherwise the AP is broken). 965 * 966 * In psd->power we have values in the order 0..N, 0..K, where 967 * N+K should cover the entire channel per 'ap', but even if it 968 * doesn't then we've pre-filled 'unlimited' as defaults. 969 * 970 * But this is all the wrong order, we want to have them in the 971 * order of the 'used' channel. 972 * 973 * So for example, we could have a 320 MHz EHT AP, which has the 974 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 975 * seem to be considered for the TPE), as follows: 976 * 977 * EHT 320: | | | | | | | | | | | | | | | | | 978 * HE 80: | | | | | 979 * used 160: | | | | | | | | | 980 * 981 * N entries: |--|--|--|--| 982 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 983 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 984 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 985 * used chan: 0 1 2 3 4 5 6 7 986 * 987 * The idx in the power array ('power idx') is like this since it 988 * comes directly from the element's N and K entries in their 989 * element order, and those are this way for HE compatibility. 990 * 991 * Rearrange them as desired here, first by putting them into the 992 * 'full chan' order, and then selecting the necessary subset for 993 * the 'used chan'. 994 */ 995 996 /* first reorder according to AP channel */ 997 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 998 for (int i = 0; i < have; i++) { 999 if (i < offset) 1000 tmp[i] = psd->power[i + psd->n]; 1001 else if (i < offset + psd->n) 1002 tmp[i] = psd->power[i - offset]; 1003 else 1004 tmp[i] = psd->power[i]; 1005 } 1006 1007 /* 1008 * and then select the subset for the used channel 1009 * (set everything to defaults first in case a driver is confused) 1010 */ 1011 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 1012 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 1013 for (int i = 0; i < needed; i++) 1014 psd->power[i] = tmp[offset + i]; 1015 1016 out: 1017 /* limit, but don't lie if there are defaults in the data */ 1018 if (needed < psd->count) 1019 psd->count = needed; 1020 } 1021 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 1022 1023 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 1024 const struct cfg80211_chan_def *ap, 1025 const struct cfg80211_chan_def *used) 1026 { 1027 /* ignore this completely for narrow/invalid channels */ 1028 if (!ieee80211_chandef_num_subchans(ap) || 1029 !ieee80211_chandef_num_subchans(used)) { 1030 ieee80211_clear_tpe(tpe); 1031 return; 1032 } 1033 1034 for (int i = 0; i < 2; i++) { 1035 int needed_pwr_count; 1036 1037 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 1038 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 1039 1040 /* limit this to the widths we actually need */ 1041 needed_pwr_count = ieee80211_chandef_num_widths(used); 1042 if (needed_pwr_count < tpe->max_local[i].count) 1043 tpe->max_local[i].count = needed_pwr_count; 1044 if (needed_pwr_count < tpe->max_reg_client[i].count) 1045 tpe->max_reg_client[i].count = needed_pwr_count; 1046 } 1047 } 1048 1049 /* 1050 * The AP part of the channel request is used to distinguish settings 1051 * to the device used for wider bandwidth OFDMA. This is used in the 1052 * channel context code to assign two channel contexts even if they're 1053 * both for the same channel, if the AP bandwidths are incompatible. 1054 * If not EHT (or driver override) then ap.chan == NULL indicates that 1055 * there's no wider BW OFDMA used. 1056 */ 1057 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 1058 struct ieee80211_chan_req *chanreq, 1059 struct ieee80211_conn_settings *conn, 1060 struct cfg80211_chan_def *ap_chandef) 1061 { 1062 chanreq->ap.chan = NULL; 1063 1064 if (conn->mode < IEEE80211_CONN_MODE_EHT) 1065 return; 1066 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 1067 return; 1068 1069 chanreq->ap = *ap_chandef; 1070 } 1071 1072 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 1073 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 1074 struct ieee80211_conn_settings *conn, 1075 struct cfg80211_bss *cbss, int link_id, 1076 struct ieee80211_chan_req *chanreq, 1077 struct cfg80211_chan_def *ap_chandef, 1078 unsigned long *userspace_selectors) 1079 { 1080 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1081 struct ieee80211_bss *bss = (void *)cbss->priv; 1082 struct ieee80211_channel *channel = cbss->channel; 1083 struct ieee80211_elems_parse_params parse_params = { 1084 .link_id = -1, 1085 .from_ap = true, 1086 .start = ies->data, 1087 .len = ies->len, 1088 .type = ies->from_beacon ? 1089 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1090 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1091 }; 1092 struct ieee802_11_elems *elems; 1093 struct ieee80211_supported_band *sband; 1094 enum ieee80211_conn_mode ap_mode; 1095 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1096 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1097 int ret; 1098 1099 again: 1100 parse_params.mode = conn->mode; 1101 elems = ieee802_11_parse_elems_full(&parse_params); 1102 if (!elems) 1103 return ERR_PTR(-ENOMEM); 1104 1105 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1106 elems, false, conn, ap_chandef); 1107 1108 /* this should be impossible since parsing depends on our mode */ 1109 if (WARN_ON(ap_mode > conn->mode)) { 1110 ret = -EINVAL; 1111 goto free; 1112 } 1113 1114 if (conn->mode != ap_mode) { 1115 conn->mode = ap_mode; 1116 kfree(elems); 1117 goto again; 1118 } 1119 1120 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1121 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1122 1123 sband = sdata->local->hw.wiphy->bands[channel->band]; 1124 1125 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1126 elems->ext_supp_rates, elems->ext_supp_rates_len, 1127 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1128 NULL); 1129 1130 switch (channel->band) { 1131 case NL80211_BAND_S1GHZ: 1132 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1133 ret = -EINVAL; 1134 goto free; 1135 } 1136 1137 chanreq->oper = *ap_chandef; 1138 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1139 IEEE80211_CHAN_DISABLED)) { 1140 ret = -EINVAL; 1141 goto free; 1142 } 1143 1144 return elems; 1145 case NL80211_BAND_6GHZ: 1146 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1147 link_id_info(sdata, link_id, 1148 "Rejecting non-HE 6/7 GHz connection"); 1149 ret = -EINVAL; 1150 goto free; 1151 } 1152 break; 1153 default: 1154 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1155 ret = -EINVAL; 1156 goto free; 1157 } 1158 } 1159 1160 switch (ap_mode) { 1161 case IEEE80211_CONN_MODE_S1G: 1162 WARN_ON(1); 1163 ret = -EINVAL; 1164 goto free; 1165 case IEEE80211_CONN_MODE_LEGACY: 1166 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1167 break; 1168 case IEEE80211_CONN_MODE_HT: 1169 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1170 conn->bw_limit, 1171 IEEE80211_CONN_BW_LIMIT_40); 1172 break; 1173 case IEEE80211_CONN_MODE_VHT: 1174 case IEEE80211_CONN_MODE_HE: 1175 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1176 conn->bw_limit, 1177 IEEE80211_CONN_BW_LIMIT_160); 1178 break; 1179 case IEEE80211_CONN_MODE_EHT: 1180 case IEEE80211_CONN_MODE_UHR: 1181 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1182 conn->bw_limit, 1183 IEEE80211_CONN_BW_LIMIT_320); 1184 break; 1185 } 1186 1187 chanreq->oper = *ap_chandef; 1188 1189 bitmap_copy(sta_selectors, userspace_selectors, 128); 1190 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1191 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1192 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1193 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1194 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1195 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1196 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1197 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1198 if (conn->mode >= IEEE80211_CONN_MODE_UHR) 1199 set_bit(BSS_MEMBERSHIP_SELECTOR_UHR_PHY, sta_selectors); 1200 1201 /* 1202 * We do not support EPD or GLK so never add them. 1203 * SAE_H2E is handled through userspace_selectors. 1204 */ 1205 1206 /* Check if we support all required features */ 1207 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1208 link_id_info(sdata, link_id, 1209 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1210 ret = -EINVAL; 1211 goto free; 1212 } 1213 1214 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1215 1216 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1217 IEEE80211_CHAN_DISABLED)) { 1218 if (chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT) { 1219 link_id_info(sdata, link_id, 1220 "unusable channel (%d MHz) for connection\n", 1221 chanreq->oper.chan->center_freq); 1222 ret = -EINVAL; 1223 goto free; 1224 } 1225 1226 ieee80211_chanreq_downgrade(chanreq, conn); 1227 } 1228 1229 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1230 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1231 IEEE80211_CHAN_NO_HE)) { 1232 conn->mode = IEEE80211_CONN_MODE_VHT; 1233 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1234 conn->bw_limit, 1235 IEEE80211_CONN_BW_LIMIT_160); 1236 } 1237 1238 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1239 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1240 IEEE80211_CHAN_NO_EHT)) { 1241 conn->mode = IEEE80211_CONN_MODE_HE; 1242 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1243 conn->bw_limit, 1244 IEEE80211_CONN_BW_LIMIT_160); 1245 } 1246 1247 if (conn->mode >= IEEE80211_CONN_MODE_UHR && 1248 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1249 IEEE80211_CHAN_NO_UHR)) 1250 conn->mode = IEEE80211_CONN_MODE_EHT; 1251 1252 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1253 link_id_info(sdata, link_id, 1254 "regulatory prevented using AP config, downgraded\n"); 1255 1256 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1257 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1258 elems->ht_operation)) { 1259 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1260 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1261 link_id_info(sdata, link_id, 1262 "required MCSes not supported, disabling HT\n"); 1263 } 1264 1265 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1266 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1267 elems->vht_operation)) { 1268 conn->mode = IEEE80211_CONN_MODE_HT; 1269 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1270 conn->bw_limit, 1271 IEEE80211_CONN_BW_LIMIT_40); 1272 link_id_info(sdata, link_id, 1273 "required MCSes not supported, disabling VHT\n"); 1274 } 1275 1276 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1277 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1278 (void *)elems->he_cap, 1279 elems->he_operation) || 1280 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1281 elems->he_operation))) { 1282 conn->mode = IEEE80211_CONN_MODE_VHT; 1283 link_id_info(sdata, link_id, 1284 "required MCSes not supported, disabling HE\n"); 1285 } 1286 1287 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1288 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1289 elems->eht_operation)) { 1290 conn->mode = IEEE80211_CONN_MODE_HE; 1291 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1292 conn->bw_limit, 1293 IEEE80211_CONN_BW_LIMIT_160); 1294 link_id_info(sdata, link_id, 1295 "required MCSes not supported, disabling EHT\n"); 1296 } 1297 1298 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1299 channel->band != NL80211_BAND_2GHZ && 1300 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1301 conn->mode = IEEE80211_CONN_MODE_HE; 1302 link_id_info(sdata, link_id, 1303 "required bandwidth not supported, disabling EHT\n"); 1304 } 1305 1306 /* the mode can only decrease, so this must terminate */ 1307 if (ap_mode != conn->mode) { 1308 kfree(elems); 1309 goto again; 1310 } 1311 1312 mlme_link_id_dbg(sdata, link_id, 1313 "connecting with %s mode, max bandwidth %d MHz\n", 1314 ieee80211_conn_mode_str(conn->mode), 1315 20 * (1 << conn->bw_limit)); 1316 1317 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1318 ret = -EINVAL; 1319 goto free; 1320 } 1321 1322 return elems; 1323 free: 1324 kfree(elems); 1325 return ERR_PTR(ret); 1326 } 1327 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1328 1329 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1330 struct ieee802_11_elems *elems, 1331 bool update, u64 *changed, u16 stype) 1332 { 1333 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1334 struct ieee80211_sub_if_data *sdata = link->sdata; 1335 struct ieee80211_chan_req chanreq = {}; 1336 struct cfg80211_chan_def ap_chandef; 1337 enum ieee80211_conn_mode ap_mode; 1338 const char *frame; 1339 u32 vht_cap_info = 0; 1340 u16 ht_opmode; 1341 int ret; 1342 1343 switch (stype) { 1344 case IEEE80211_STYPE_BEACON: 1345 frame = "beacon"; 1346 break; 1347 case IEEE80211_STYPE_ASSOC_RESP: 1348 frame = "assoc response"; 1349 break; 1350 case IEEE80211_STYPE_REASSOC_RESP: 1351 frame = "reassoc response"; 1352 break; 1353 case IEEE80211_STYPE_ACTION: 1354 /* the only action frame that gets here */ 1355 frame = "ML reconf response"; 1356 break; 1357 default: 1358 return -EINVAL; 1359 } 1360 1361 /* don't track any bandwidth changes in legacy/S1G modes */ 1362 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1363 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1364 return 0; 1365 1366 if (elems->vht_cap_elem) 1367 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1368 1369 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1370 elems, true, &link->u.mgd.conn, 1371 &ap_chandef); 1372 1373 if (ap_mode != link->u.mgd.conn.mode) { 1374 link_info(link, 1375 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1376 link->u.mgd.bssid, 1377 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1378 ieee80211_conn_mode_str(ap_mode), frame); 1379 return -EINVAL; 1380 } 1381 1382 chanreq.oper = ap_chandef; 1383 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1384 &ap_chandef); 1385 1386 /* 1387 * if HT operation mode changed store the new one - 1388 * this may be applicable even if channel is identical 1389 */ 1390 if (elems->ht_operation) { 1391 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1392 if (link->conf->ht_operation_mode != ht_opmode) { 1393 *changed |= BSS_CHANGED_HT; 1394 link->conf->ht_operation_mode = ht_opmode; 1395 } 1396 } 1397 1398 /* 1399 * Downgrade the new channel if we associated with restricted 1400 * bandwidth capabilities. For example, if we associated as a 1401 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1402 * or config reasons) then switching to a 40 MHz channel now 1403 * won't do us any good -- we couldn't use it with the AP. 1404 */ 1405 while (link->u.mgd.conn.bw_limit < 1406 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1407 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1408 1409 /* TPE element is not present in (re)assoc/ML reconfig response */ 1410 if (stype == IEEE80211_STYPE_BEACON && 1411 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1412 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1413 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1414 &chanreq.oper); 1415 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1416 link->conf->tpe = elems->tpe; 1417 *changed |= BSS_CHANGED_TPE; 1418 } 1419 } 1420 1421 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1422 return 0; 1423 1424 link_info(link, 1425 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1426 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1427 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1428 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1429 chanreq.oper.center_freq2); 1430 1431 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1432 sdata_info(sdata, 1433 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1434 link->u.mgd.bssid, frame); 1435 return -EINVAL; 1436 } 1437 1438 if (!update) { 1439 link->conf->chanreq = chanreq; 1440 return 0; 1441 } 1442 1443 /* 1444 * We're tracking the current AP here, so don't do any further checks 1445 * here. This keeps us from playing ping-pong with regulatory, without 1446 * it the following can happen (for example): 1447 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1448 * - AP advertises regdom US 1449 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1450 * - we detect an unsupported channel and disconnect 1451 * - disconnect causes CRDA to reload world regdomain and the game 1452 * starts anew. 1453 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1454 * 1455 * It seems possible that there are still scenarios with CSA or real 1456 * bandwidth changes where a this could happen, but those cases are 1457 * less common and wouldn't completely prevent using the AP. 1458 */ 1459 1460 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1461 if (ret) { 1462 sdata_info(sdata, 1463 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1464 link->u.mgd.bssid, frame); 1465 return ret; 1466 } 1467 1468 cfg80211_schedule_channels_check(&sdata->wdev); 1469 return 0; 1470 } 1471 1472 /* frame sending functions */ 1473 1474 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1475 struct sk_buff *skb, u8 ap_ht_param, 1476 struct ieee80211_supported_band *sband, 1477 struct ieee80211_channel *channel, 1478 enum ieee80211_smps_mode smps, 1479 const struct ieee80211_conn_settings *conn) 1480 { 1481 u8 *pos; 1482 u32 flags = channel->flags; 1483 u16 cap; 1484 struct ieee80211_sta_ht_cap ht_cap; 1485 1486 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1487 1488 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1489 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1490 1491 /* determine capability flags */ 1492 cap = ht_cap.cap; 1493 1494 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1495 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1496 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1497 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1498 cap &= ~IEEE80211_HT_CAP_SGI_40; 1499 } 1500 break; 1501 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1502 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1503 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1504 cap &= ~IEEE80211_HT_CAP_SGI_40; 1505 } 1506 break; 1507 } 1508 1509 /* 1510 * If 40 MHz was disabled associate as though we weren't 1511 * capable of 40 MHz -- some broken APs will never fall 1512 * back to trying to transmit in 20 MHz. 1513 */ 1514 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1515 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1516 cap &= ~IEEE80211_HT_CAP_SGI_40; 1517 } 1518 1519 /* set SM PS mode properly */ 1520 cap &= ~IEEE80211_HT_CAP_SM_PS; 1521 switch (smps) { 1522 case IEEE80211_SMPS_AUTOMATIC: 1523 case IEEE80211_SMPS_NUM_MODES: 1524 WARN_ON(1); 1525 fallthrough; 1526 case IEEE80211_SMPS_OFF: 1527 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1528 IEEE80211_HT_CAP_SM_PS_SHIFT; 1529 break; 1530 case IEEE80211_SMPS_STATIC: 1531 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1532 IEEE80211_HT_CAP_SM_PS_SHIFT; 1533 break; 1534 case IEEE80211_SMPS_DYNAMIC: 1535 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1536 IEEE80211_HT_CAP_SM_PS_SHIFT; 1537 break; 1538 } 1539 1540 /* reserve and fill IE */ 1541 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1542 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1543 } 1544 1545 /* This function determines vht capability flags for the association 1546 * and builds the IE. 1547 * Note - the function returns true to own the MU-MIMO capability 1548 */ 1549 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1550 struct sk_buff *skb, 1551 struct ieee80211_supported_band *sband, 1552 struct ieee80211_vht_cap *ap_vht_cap, 1553 const struct ieee80211_conn_settings *conn) 1554 { 1555 struct ieee80211_local *local = sdata->local; 1556 u8 *pos; 1557 u32 cap; 1558 struct ieee80211_sta_vht_cap vht_cap; 1559 u32 mask, ap_bf_sts, our_bf_sts; 1560 bool mu_mimo_owner = false; 1561 1562 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1563 1564 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1565 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1566 1567 /* determine capability flags */ 1568 cap = vht_cap.cap; 1569 1570 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1571 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1572 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1573 } 1574 1575 /* 1576 * Some APs apparently get confused if our capabilities are better 1577 * than theirs, so restrict what we advertise in the assoc request. 1578 */ 1579 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1580 if (!(ap_vht_cap->vht_cap_info & 1581 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1582 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1583 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1584 else if (!(ap_vht_cap->vht_cap_info & 1585 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1586 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1587 } 1588 1589 /* 1590 * If some other vif is using the MU-MIMO capability we cannot associate 1591 * using MU-MIMO - this will lead to contradictions in the group-id 1592 * mechanism. 1593 * Ownership is defined since association request, in order to avoid 1594 * simultaneous associations with MU-MIMO. 1595 */ 1596 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1597 bool disable_mu_mimo = false; 1598 struct ieee80211_sub_if_data *other; 1599 1600 list_for_each_entry(other, &local->interfaces, list) { 1601 if (other->vif.bss_conf.mu_mimo_owner) { 1602 disable_mu_mimo = true; 1603 break; 1604 } 1605 } 1606 if (disable_mu_mimo) 1607 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1608 else 1609 mu_mimo_owner = true; 1610 } 1611 1612 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1613 1614 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1615 our_bf_sts = cap & mask; 1616 1617 if (ap_bf_sts < our_bf_sts) { 1618 cap &= ~mask; 1619 cap |= ap_bf_sts; 1620 } 1621 1622 /* reserve and fill IE */ 1623 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1624 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1625 1626 return mu_mimo_owner; 1627 } 1628 1629 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1630 struct sk_buff *skb, 1631 enum nl80211_chan_width width, 1632 struct ieee80211_supported_band *sband, 1633 struct ieee80211_mgd_assoc_data *assoc_data) 1634 { 1635 u32 rates; 1636 1637 if (assoc_data->supp_rates_len && 1638 !ieee80211_hw_check(&local->hw, STRICT)) { 1639 /* 1640 * Get all rates supported by the device and the AP as 1641 * some APs don't like getting a superset of their rates 1642 * in the association request (e.g. D-Link DAP 1353 in 1643 * b-only mode)... 1644 */ 1645 ieee80211_parse_bitrates(sband, 1646 assoc_data->supp_rates, 1647 assoc_data->supp_rates_len, 1648 &rates); 1649 } else { 1650 /* 1651 * In case AP not provide any supported rates information 1652 * before association, we send information element(s) with 1653 * all rates that we support. 1654 */ 1655 rates = ~0; 1656 } 1657 1658 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1659 WLAN_EID_SUPP_RATES); 1660 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1661 WLAN_EID_EXT_SUPP_RATES); 1662 } 1663 1664 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1665 const u8 *elems, 1666 size_t elems_len, 1667 size_t offset) 1668 { 1669 size_t noffset; 1670 1671 static const u8 before_ht[] = { 1672 WLAN_EID_SSID, 1673 WLAN_EID_SUPP_RATES, 1674 WLAN_EID_EXT_SUPP_RATES, 1675 WLAN_EID_PWR_CAPABILITY, 1676 WLAN_EID_SUPPORTED_CHANNELS, 1677 WLAN_EID_RSN, 1678 WLAN_EID_QOS_CAPA, 1679 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1680 WLAN_EID_MOBILITY_DOMAIN, 1681 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1682 WLAN_EID_RIC_DATA, /* reassoc only */ 1683 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1684 }; 1685 static const u8 after_ric[] = { 1686 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1687 WLAN_EID_HT_CAPABILITY, 1688 WLAN_EID_BSS_COEX_2040, 1689 /* luckily this is almost always there */ 1690 WLAN_EID_EXT_CAPABILITY, 1691 WLAN_EID_QOS_TRAFFIC_CAPA, 1692 WLAN_EID_TIM_BCAST_REQ, 1693 WLAN_EID_INTERWORKING, 1694 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1695 WLAN_EID_VHT_CAPABILITY, 1696 WLAN_EID_OPMODE_NOTIF, 1697 }; 1698 1699 if (!elems_len) 1700 return offset; 1701 1702 noffset = ieee80211_ie_split_ric(elems, elems_len, 1703 before_ht, 1704 ARRAY_SIZE(before_ht), 1705 after_ric, 1706 ARRAY_SIZE(after_ric), 1707 offset); 1708 skb_put_data(skb, elems + offset, noffset - offset); 1709 1710 return noffset; 1711 } 1712 1713 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1714 const u8 *elems, 1715 size_t elems_len, 1716 size_t offset) 1717 { 1718 static const u8 before_vht[] = { 1719 /* 1720 * no need to list the ones split off before HT 1721 * or generated here 1722 */ 1723 WLAN_EID_BSS_COEX_2040, 1724 WLAN_EID_EXT_CAPABILITY, 1725 WLAN_EID_QOS_TRAFFIC_CAPA, 1726 WLAN_EID_TIM_BCAST_REQ, 1727 WLAN_EID_INTERWORKING, 1728 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1729 }; 1730 size_t noffset; 1731 1732 if (!elems_len) 1733 return offset; 1734 1735 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1736 noffset = ieee80211_ie_split(elems, elems_len, 1737 before_vht, ARRAY_SIZE(before_vht), 1738 offset); 1739 skb_put_data(skb, elems + offset, noffset - offset); 1740 1741 return noffset; 1742 } 1743 1744 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1745 const u8 *elems, 1746 size_t elems_len, 1747 size_t offset) 1748 { 1749 static const u8 before_he[] = { 1750 /* 1751 * no need to list the ones split off before VHT 1752 * or generated here 1753 */ 1754 WLAN_EID_OPMODE_NOTIF, 1755 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1756 /* 11ai elements */ 1757 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1758 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1759 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1760 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1761 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1762 /* TODO: add 11ah/11aj/11ak elements */ 1763 }; 1764 size_t noffset; 1765 1766 if (!elems_len) 1767 return offset; 1768 1769 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1770 noffset = ieee80211_ie_split(elems, elems_len, 1771 before_he, ARRAY_SIZE(before_he), 1772 offset); 1773 skb_put_data(skb, elems + offset, noffset - offset); 1774 1775 return noffset; 1776 } 1777 1778 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1779 const u8 *elems, size_t elems_len, 1780 size_t offset) 1781 { 1782 static const u8 before_reg_conn[] = { 1783 /* 1784 * no need to list the ones split off before HE 1785 * or generated here 1786 */ 1787 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1788 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1789 }; 1790 size_t noffset; 1791 1792 if (!elems_len) 1793 return offset; 1794 1795 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1796 ARRAY_SIZE(before_reg_conn), offset); 1797 skb_put_data(skb, elems + offset, noffset - offset); 1798 1799 return noffset; 1800 } 1801 1802 #define PRESENT_ELEMS_MAX 8 1803 #define PRESENT_ELEM_EXT_OFFS 0x100 1804 1805 static void 1806 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1807 struct sk_buff *skb, u16 capab, 1808 const struct element *ext_capa, 1809 const u16 *present_elems, 1810 struct ieee80211_mgd_assoc_data *assoc_data); 1811 1812 static size_t 1813 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1814 struct sk_buff *skb, u16 *capab, 1815 const struct element *ext_capa, 1816 const u8 *extra_elems, 1817 size_t extra_elems_len, 1818 unsigned int link_id, 1819 struct ieee80211_link_data *link, 1820 u16 *present_elems, 1821 struct ieee80211_mgd_assoc_data *assoc_data) 1822 { 1823 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1824 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1825 struct ieee80211_channel *chan = cbss->channel; 1826 const struct ieee80211_sband_iftype_data *iftd; 1827 struct ieee80211_local *local = sdata->local; 1828 struct ieee80211_supported_band *sband; 1829 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1830 struct ieee80211_chanctx_conf *chanctx_conf; 1831 enum ieee80211_smps_mode smps_mode; 1832 u16 orig_capab = *capab; 1833 size_t offset = 0; 1834 int present_elems_len = 0; 1835 u8 *pos; 1836 int i; 1837 1838 #define ADD_PRESENT_ELEM(id) do { \ 1839 /* need a last for termination - we use 0 == SSID */ \ 1840 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1841 present_elems[present_elems_len++] = (id); \ 1842 } while (0) 1843 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1844 1845 if (link) 1846 smps_mode = link->smps_mode; 1847 else if (sdata->u.mgd.powersave) 1848 smps_mode = IEEE80211_SMPS_DYNAMIC; 1849 else 1850 smps_mode = IEEE80211_SMPS_OFF; 1851 1852 if (link) { 1853 /* 1854 * 5/10 MHz scenarios are only viable without MLO, in which 1855 * case this pointer should be used ... All of this is a bit 1856 * unclear though, not sure this even works at all. 1857 */ 1858 rcu_read_lock(); 1859 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1860 if (chanctx_conf) 1861 width = chanctx_conf->def.width; 1862 rcu_read_unlock(); 1863 } 1864 1865 sband = local->hw.wiphy->bands[chan->band]; 1866 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1867 1868 if (sband->band == NL80211_BAND_2GHZ) { 1869 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1870 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1871 } 1872 1873 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1874 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1875 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1876 1877 if (sband->band != NL80211_BAND_S1GHZ) 1878 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1879 1880 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1881 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1882 struct cfg80211_chan_def chandef = { 1883 .width = width, 1884 .chan = chan, 1885 }; 1886 1887 pos = skb_put(skb, 4); 1888 *pos++ = WLAN_EID_PWR_CAPABILITY; 1889 *pos++ = 2; 1890 *pos++ = 0; /* min tx power */ 1891 /* max tx power */ 1892 *pos++ = ieee80211_chandef_max_power(&chandef); 1893 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1894 } 1895 1896 /* 1897 * Per spec, we shouldn't include the list of channels if we advertise 1898 * support for extended channel switching, but we've always done that; 1899 * (for now?) apply this restriction only on the (new) 6 GHz band. 1900 */ 1901 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1902 (sband->band != NL80211_BAND_6GHZ || 1903 !ext_capa || ext_capa->datalen < 1 || 1904 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1905 /* TODO: get this in reg domain format */ 1906 pos = skb_put(skb, 2 * sband->n_channels + 2); 1907 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1908 *pos++ = 2 * sband->n_channels; 1909 for (i = 0; i < sband->n_channels; i++) { 1910 int cf = sband->channels[i].center_freq; 1911 1912 *pos++ = ieee80211_frequency_to_channel(cf); 1913 *pos++ = 1; /* one channel in the subband*/ 1914 } 1915 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1916 } 1917 1918 /* if present, add any custom IEs that go before HT */ 1919 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1920 extra_elems_len, 1921 offset); 1922 1923 if (sband->band != NL80211_BAND_6GHZ && 1924 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1925 ieee80211_add_ht_ie(sdata, skb, 1926 assoc_data->link[link_id].ap_ht_param, 1927 sband, chan, smps_mode, 1928 &assoc_data->link[link_id].conn); 1929 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1930 } 1931 1932 /* if present, add any custom IEs that go before VHT */ 1933 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1934 extra_elems_len, 1935 offset); 1936 1937 if (sband->band != NL80211_BAND_6GHZ && 1938 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1939 sband->vht_cap.vht_supported) { 1940 bool mu_mimo_owner = 1941 ieee80211_add_vht_ie(sdata, skb, sband, 1942 &assoc_data->link[link_id].ap_vht_cap, 1943 &assoc_data->link[link_id].conn); 1944 1945 if (link) 1946 link->conf->mu_mimo_owner = mu_mimo_owner; 1947 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1948 } 1949 1950 /* if present, add any custom IEs that go before HE */ 1951 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1952 extra_elems_len, 1953 offset); 1954 1955 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1956 ieee80211_put_he_cap(skb, sdata, sband, 1957 &assoc_data->link[link_id].conn); 1958 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1959 if (sband->band == NL80211_BAND_6GHZ) 1960 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1961 } 1962 1963 /* 1964 * if present, add any custom IEs that go before regulatory 1965 * connectivity element 1966 */ 1967 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1968 extra_elems_len, offset); 1969 1970 if (sband->band == NL80211_BAND_6GHZ) { 1971 /* 1972 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1973 * capable of operating on the 6 GHz band shall transmit 1974 * regulatory connectivity element. 1975 */ 1976 ieee80211_put_reg_conn(skb, chan->flags); 1977 } 1978 1979 /* 1980 * careful - need to know about all the present elems before 1981 * calling ieee80211_assoc_add_ml_elem(), so add these if 1982 * we're going to put them after the ML element 1983 */ 1984 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1985 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1986 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 1987 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_UHR_CAPA); 1988 1989 if (link_id == assoc_data->assoc_link_id) 1990 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1991 present_elems, assoc_data); 1992 1993 /* crash if somebody gets it wrong */ 1994 present_elems = NULL; 1995 1996 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1997 ieee80211_put_eht_cap(skb, sdata, sband, 1998 &assoc_data->link[link_id].conn); 1999 2000 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 2001 ieee80211_put_uhr_cap(skb, sdata, sband); 2002 2003 if (sband->band == NL80211_BAND_S1GHZ) { 2004 ieee80211_add_aid_request_ie(sdata, skb); 2005 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 2006 } 2007 2008 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 2009 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 2010 2011 return offset; 2012 } 2013 2014 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 2015 const u16 *outer, 2016 const u16 *inner) 2017 { 2018 unsigned int skb_len = skb->len; 2019 bool at_extension = false; 2020 bool added = false; 2021 int i, j; 2022 u8 *len, *list_len = NULL; 2023 2024 skb_put_u8(skb, WLAN_EID_EXTENSION); 2025 len = skb_put(skb, 1); 2026 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 2027 2028 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 2029 u16 elem = outer[i]; 2030 bool have_inner = false; 2031 2032 /* should at least be sorted in the sense of normal -> ext */ 2033 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 2034 2035 /* switch to extension list */ 2036 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 2037 at_extension = true; 2038 if (!list_len) 2039 skb_put_u8(skb, 0); 2040 list_len = NULL; 2041 } 2042 2043 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 2044 if (elem == inner[j]) { 2045 have_inner = true; 2046 break; 2047 } 2048 } 2049 2050 if (have_inner) 2051 continue; 2052 2053 if (!list_len) { 2054 list_len = skb_put(skb, 1); 2055 *list_len = 0; 2056 } 2057 *list_len += 1; 2058 skb_put_u8(skb, (u8)elem); 2059 added = true; 2060 } 2061 2062 /* if we added a list but no extension list, make a zero-len one */ 2063 if (added && (!at_extension || !list_len)) 2064 skb_put_u8(skb, 0); 2065 2066 /* if nothing added remove extension element completely */ 2067 if (!added) 2068 skb_trim(skb, skb_len); 2069 else 2070 *len = skb->len - skb_len - 2; 2071 } 2072 2073 static void 2074 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 2075 struct sk_buff *skb, u16 capab, 2076 const struct element *ext_capa, 2077 const u16 *outer_present_elems, 2078 struct ieee80211_mgd_assoc_data *assoc_data) 2079 { 2080 struct ieee80211_local *local = sdata->local; 2081 struct ieee80211_multi_link_elem *ml_elem; 2082 struct ieee80211_mle_basic_common_info *common; 2083 const struct wiphy_iftype_ext_capab *ift_ext_capa; 2084 __le16 eml_capa = 0, mld_capa_ops = 0; 2085 unsigned int link_id; 2086 u8 *ml_elem_len; 2087 void *capab_pos; 2088 2089 if (!ieee80211_vif_is_mld(&sdata->vif)) 2090 return; 2091 2092 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 2093 ieee80211_vif_type_p2p(&sdata->vif)); 2094 if (ift_ext_capa) { 2095 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 2096 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 2097 } 2098 2099 skb_put_u8(skb, WLAN_EID_EXTENSION); 2100 ml_elem_len = skb_put(skb, 1); 2101 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2102 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2103 ml_elem->control = 2104 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2105 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2106 common = skb_put(skb, sizeof(*common)); 2107 common->len = sizeof(*common) + 2108 2; /* MLD capa/ops */ 2109 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2110 2111 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2112 if (eml_capa & 2113 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2114 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2115 common->len += 2; /* EML capabilities */ 2116 ml_elem->control |= 2117 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2118 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2119 } 2120 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2121 2122 if (assoc_data->ext_mld_capa_ops) { 2123 ml_elem->control |= 2124 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2125 common->len += 2; 2126 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2127 sizeof(assoc_data->ext_mld_capa_ops)); 2128 } 2129 2130 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2131 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2132 const u8 *extra_elems; 2133 size_t extra_elems_len; 2134 size_t extra_used; 2135 u8 *subelem_len = NULL; 2136 __le16 ctrl; 2137 2138 if (!assoc_data->link[link_id].bss || 2139 link_id == assoc_data->assoc_link_id) 2140 continue; 2141 2142 extra_elems = assoc_data->link[link_id].elems; 2143 extra_elems_len = assoc_data->link[link_id].elems_len; 2144 2145 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2146 subelem_len = skb_put(skb, 1); 2147 2148 ctrl = cpu_to_le16(link_id | 2149 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2150 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2151 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2152 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2153 skb_put_data(skb, assoc_data->link[link_id].addr, 2154 ETH_ALEN); 2155 /* 2156 * Now add the contents of the (re)association request, 2157 * but the "listen interval" and "current AP address" 2158 * (if applicable) are skipped. So we only have 2159 * the capability field (remember the position and fill 2160 * later), followed by the elements added below by 2161 * calling ieee80211_add_link_elems(). 2162 */ 2163 capab_pos = skb_put(skb, 2); 2164 2165 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2166 ext_capa, 2167 extra_elems, 2168 extra_elems_len, 2169 link_id, NULL, 2170 link_present_elems, 2171 assoc_data); 2172 if (extra_elems) 2173 skb_put_data(skb, extra_elems + extra_used, 2174 extra_elems_len - extra_used); 2175 2176 put_unaligned_le16(capab, capab_pos); 2177 2178 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2179 link_present_elems); 2180 2181 ieee80211_fragment_element(skb, subelem_len, 2182 IEEE80211_MLE_SUBELEM_FRAGMENT); 2183 } 2184 2185 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2186 } 2187 2188 static int 2189 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2190 enum nl80211_iftype iftype, 2191 struct cfg80211_bss *cbss, 2192 size_t elems_len) 2193 { 2194 struct ieee80211_local *local = sdata->local; 2195 const struct ieee80211_sband_iftype_data *iftd; 2196 struct ieee80211_supported_band *sband; 2197 size_t size = 0; 2198 2199 if (!cbss) 2200 return size; 2201 2202 sband = local->hw.wiphy->bands[cbss->channel->band]; 2203 2204 /* add STA profile elements length */ 2205 size += elems_len; 2206 2207 /* and supported rates length */ 2208 size += 4 + sband->n_bitrates; 2209 2210 /* supported channels */ 2211 size += 2 + 2 * sband->n_channels; 2212 2213 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2214 if (iftd) 2215 size += iftd->vendor_elems.len; 2216 2217 /* power capability */ 2218 size += 4; 2219 2220 /* HT, VHT, HE, EHT */ 2221 size += 2 + sizeof(struct ieee80211_ht_cap); 2222 size += 2 + sizeof(struct ieee80211_vht_cap); 2223 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2224 sizeof(struct ieee80211_he_mcs_nss_supp) + 2225 IEEE80211_HE_PPE_THRES_MAX_LEN; 2226 2227 if (sband->band == NL80211_BAND_6GHZ) { 2228 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2229 /* reg connection */ 2230 size += 4; 2231 } 2232 2233 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2234 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2235 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2236 2237 size += 2 + 1 + sizeof(struct ieee80211_uhr_cap) + 2238 sizeof(struct ieee80211_uhr_cap_phy); 2239 2240 return size; 2241 } 2242 2243 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2244 { 2245 struct ieee80211_local *local = sdata->local; 2246 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2247 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2248 struct ieee80211_link_data *link; 2249 struct sk_buff *skb; 2250 struct ieee80211_mgmt *mgmt; 2251 u8 *pos, qos_info, *ie_start; 2252 size_t offset, noffset; 2253 u16 capab = 0, link_capab; 2254 __le16 listen_int; 2255 struct element *ext_capa = NULL; 2256 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2257 struct ieee80211_prep_tx_info info = {}; 2258 unsigned int link_id, n_links = 0; 2259 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2260 struct sta_info *sta; 2261 bool assoc_encrypt; 2262 void *capab_pos; 2263 size_t size; 2264 int ret; 2265 2266 /* we know it's writable, cast away the const */ 2267 if (assoc_data->ie_len) 2268 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2269 assoc_data->ie, 2270 assoc_data->ie_len); 2271 2272 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2273 2274 size = local->hw.extra_tx_headroom + 2275 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2276 2 + assoc_data->ssid_len + /* SSID */ 2277 assoc_data->ie_len + /* extra IEs */ 2278 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2279 9; /* WMM */ 2280 2281 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2282 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2283 size_t elems_len = assoc_data->link[link_id].elems_len; 2284 2285 if (!cbss) 2286 continue; 2287 2288 n_links++; 2289 2290 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2291 elems_len); 2292 2293 /* non-inheritance element */ 2294 size += 2 + 2 + PRESENT_ELEMS_MAX; 2295 2296 /* should be the same across all BSSes */ 2297 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2298 capab |= WLAN_CAPABILITY_PRIVACY; 2299 } 2300 2301 if (ieee80211_vif_is_mld(&sdata->vif)) { 2302 /* consider the multi-link element with STA profile */ 2303 size += sizeof(struct ieee80211_multi_link_elem); 2304 /* max common info field in basic multi-link element */ 2305 size += sizeof(struct ieee80211_mle_basic_common_info) + 2306 2 + /* capa & op */ 2307 2 + /* ext capa & op */ 2308 2; /* EML capa */ 2309 2310 /* The capability elements were already considered above */ 2311 size += (n_links - 1) * 2312 (1 + 1 + /* subelement ID/length */ 2313 2 + /* STA control */ 2314 1 + ETH_ALEN + 2 /* STA Info field */); 2315 } 2316 2317 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2318 if (WARN_ON(!link)) 2319 return -EINVAL; 2320 2321 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2322 return -EINVAL; 2323 2324 skb = alloc_skb(size, GFP_KERNEL); 2325 if (!skb) 2326 return -ENOMEM; 2327 2328 skb_reserve(skb, local->hw.extra_tx_headroom); 2329 2330 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2331 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2332 2333 /* Set MBSSID support for HE AP if needed */ 2334 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2335 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2336 ext_capa && ext_capa->datalen >= 3) 2337 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2338 2339 mgmt = skb_put_zero(skb, 24); 2340 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2341 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2342 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2343 2344 listen_int = cpu_to_le16(assoc_data->s1g ? 2345 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2346 local->hw.conf.listen_interval); 2347 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2348 skb_put(skb, 10); 2349 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2350 IEEE80211_STYPE_REASSOC_REQ); 2351 capab_pos = &mgmt->u.reassoc_req.capab_info; 2352 mgmt->u.reassoc_req.listen_interval = listen_int; 2353 memcpy(mgmt->u.reassoc_req.current_ap, 2354 assoc_data->prev_ap_addr, ETH_ALEN); 2355 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2356 } else { 2357 skb_put(skb, 4); 2358 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2359 IEEE80211_STYPE_ASSOC_REQ); 2360 capab_pos = &mgmt->u.assoc_req.capab_info; 2361 mgmt->u.assoc_req.listen_interval = listen_int; 2362 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2363 } 2364 2365 /* SSID */ 2366 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2367 ie_start = pos; 2368 *pos++ = WLAN_EID_SSID; 2369 *pos++ = assoc_data->ssid_len; 2370 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2371 2372 /* 2373 * This bit is technically reserved, so it shouldn't matter for either 2374 * the AP or us, but it also means we shouldn't set it. However, we've 2375 * always set it in the past, and apparently some EHT APs check that 2376 * we don't set it. To avoid interoperability issues with old APs that 2377 * for some reason check it and want it to be set, set the bit for all 2378 * pre-EHT connections as we used to do. 2379 */ 2380 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2381 !ieee80211_hw_check(&local->hw, STRICT)) 2382 capab |= WLAN_CAPABILITY_ESS; 2383 2384 /* add the elements for the assoc (main) link */ 2385 link_capab = capab; 2386 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2387 ext_capa, 2388 assoc_data->ie, 2389 assoc_data->ie_len, 2390 assoc_data->assoc_link_id, link, 2391 present_elems, assoc_data); 2392 put_unaligned_le16(link_capab, capab_pos); 2393 2394 /* if present, add any custom non-vendor IEs */ 2395 if (assoc_data->ie_len) { 2396 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2397 assoc_data->ie_len, 2398 offset); 2399 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2400 offset = noffset; 2401 } 2402 2403 if (assoc_data->wmm) { 2404 if (assoc_data->uapsd) { 2405 qos_info = ifmgd->uapsd_queues; 2406 qos_info |= (ifmgd->uapsd_max_sp_len << 2407 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2408 } else { 2409 qos_info = 0; 2410 } 2411 2412 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2413 } 2414 2415 /* add any remaining custom (i.e. vendor specific here) IEs */ 2416 if (assoc_data->ie_len) { 2417 noffset = assoc_data->ie_len; 2418 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2419 } 2420 2421 if (assoc_data->fils_kek_len) { 2422 ret = fils_encrypt_assoc_req(skb, assoc_data); 2423 if (ret < 0) { 2424 dev_kfree_skb(skb); 2425 return ret; 2426 } 2427 } 2428 2429 pos = skb_tail_pointer(skb); 2430 kfree(ifmgd->assoc_req_ies); 2431 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2432 if (!ifmgd->assoc_req_ies) { 2433 dev_kfree_skb(skb); 2434 return -ENOMEM; 2435 } 2436 2437 ifmgd->assoc_req_ies_len = pos - ie_start; 2438 2439 info.link_id = assoc_data->assoc_link_id; 2440 drv_mgd_prepare_tx(local, sdata, &info); 2441 2442 sta = sta_info_get_bss(sdata, sdata->vif.cfg.ap_addr); 2443 2444 assoc_encrypt = sta && sta->sta.epp_peer && 2445 wiphy_dereference(sdata->local->hw.wiphy, 2446 sta->ptk[sta->ptk_idx]); 2447 2448 if (!assoc_encrypt) 2449 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2450 2451 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2452 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2453 IEEE80211_TX_INTFL_MLME_CONN_TX; 2454 ieee80211_tx_skb(sdata, skb); 2455 2456 return 0; 2457 } 2458 2459 void ieee80211_send_pspoll(struct ieee80211_local *local, 2460 struct ieee80211_sub_if_data *sdata) 2461 { 2462 struct ieee80211_pspoll *pspoll; 2463 struct sk_buff *skb; 2464 2465 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2466 if (!skb) 2467 return; 2468 2469 pspoll = (struct ieee80211_pspoll *) skb->data; 2470 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2471 2472 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2473 ieee80211_tx_skb(sdata, skb); 2474 } 2475 2476 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2477 struct ieee80211_sub_if_data *sdata, 2478 bool powersave) 2479 { 2480 struct sk_buff *skb; 2481 struct ieee80211_hdr_3addr *nullfunc; 2482 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2483 2484 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2485 !ieee80211_hw_check(&local->hw, 2486 DOESNT_SUPPORT_QOS_NDP)); 2487 if (!skb) 2488 return; 2489 2490 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2491 if (powersave) 2492 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2493 2494 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2495 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2496 2497 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2498 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2499 2500 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2501 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2502 2503 ieee80211_tx_skb(sdata, skb); 2504 } 2505 2506 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2507 struct ieee80211_sub_if_data *sdata) 2508 { 2509 struct sk_buff *skb; 2510 struct ieee80211_hdr *nullfunc; 2511 __le16 fc; 2512 2513 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2514 return; 2515 2516 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2517 if (!skb) 2518 return; 2519 2520 skb_reserve(skb, local->hw.extra_tx_headroom); 2521 2522 nullfunc = skb_put_zero(skb, 30); 2523 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2524 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2525 nullfunc->frame_control = fc; 2526 memcpy(nullfunc->addr1, sdata->vif.cfg.ap_addr, ETH_ALEN); 2527 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2528 memcpy(nullfunc->addr3, sdata->vif.cfg.ap_addr, ETH_ALEN); 2529 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2530 2531 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2532 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2533 ieee80211_tx_skb(sdata, skb); 2534 } 2535 2536 /* spectrum management related things */ 2537 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2538 struct wiphy_work *work) 2539 { 2540 struct ieee80211_link_data *link = 2541 container_of(work, struct ieee80211_link_data, 2542 u.mgd.csa.switch_work.work); 2543 struct ieee80211_sub_if_data *sdata = link->sdata; 2544 struct ieee80211_local *local = sdata->local; 2545 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2546 int ret; 2547 2548 if (!ieee80211_sdata_running(sdata)) 2549 return; 2550 2551 lockdep_assert_wiphy(local->hw.wiphy); 2552 2553 if (!ifmgd->associated) 2554 return; 2555 2556 if (!link->conf->csa_active) 2557 return; 2558 2559 /* 2560 * If the link isn't active (now), we cannot wait for beacons, won't 2561 * have a reserved chanctx, etc. Just switch over the chandef and 2562 * update cfg80211 directly. 2563 */ 2564 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2565 struct link_sta_info *link_sta; 2566 struct sta_info *ap_sta; 2567 2568 link->conf->chanreq = link->csa.chanreq; 2569 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2570 link->link_id); 2571 link->conf->csa_active = false; 2572 2573 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2574 if (WARN_ON(!ap_sta)) 2575 return; 2576 2577 link_sta = wiphy_dereference(wiphy, 2578 ap_sta->link[link->link_id]); 2579 if (WARN_ON(!link_sta)) 2580 return; 2581 2582 link_sta->pub->bandwidth = 2583 _ieee80211_sta_cur_vht_bw(link_sta, 2584 &link->csa.chanreq.oper); 2585 return; 2586 } 2587 2588 /* 2589 * using reservation isn't immediate as it may be deferred until later 2590 * with multi-vif. once reservation is complete it will re-schedule the 2591 * work with no reserved_chanctx so verify chandef to check if it 2592 * completed successfully 2593 */ 2594 2595 if (link->reserved_chanctx) { 2596 /* 2597 * with multi-vif csa driver may call ieee80211_csa_finish() 2598 * many times while waiting for other interfaces to use their 2599 * reservations 2600 */ 2601 if (link->reserved_ready) 2602 return; 2603 2604 ret = ieee80211_link_use_reserved_context(link); 2605 if (ret) { 2606 link_info(link, 2607 "failed to use reserved channel context, disconnecting (err=%d)\n", 2608 ret); 2609 wiphy_work_queue(sdata->local->hw.wiphy, 2610 &ifmgd->csa_connection_drop_work); 2611 } 2612 return; 2613 } 2614 2615 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2616 &link->csa.chanreq)) { 2617 link_info(link, 2618 "failed to finalize channel switch, disconnecting\n"); 2619 wiphy_work_queue(sdata->local->hw.wiphy, 2620 &ifmgd->csa_connection_drop_work); 2621 return; 2622 } 2623 2624 link->u.mgd.csa.waiting_bcn = true; 2625 2626 /* 2627 * The next beacon really should always be different, so this should 2628 * have no effect whatsoever. However, some APs (we observed this in 2629 * an Asus AXE11000), the beacon after the CSA might be identical to 2630 * the last beacon on the old channel - in this case we'd ignore it. 2631 * Resetting the CRC will lead us to handle it better (albeit with a 2632 * disconnect, but clearly the AP is broken.) 2633 */ 2634 link->u.mgd.beacon_crc_valid = false; 2635 2636 /* apply new TPE restrictions immediately on the new channel */ 2637 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2638 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2639 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2640 &link->u.mgd.csa.ap_chandef, 2641 &link->conf->chanreq.oper); 2642 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2643 sizeof(link->u.mgd.csa.tpe))) { 2644 link->conf->tpe = link->u.mgd.csa.tpe; 2645 ieee80211_link_info_change_notify(sdata, link, 2646 BSS_CHANGED_TPE); 2647 } 2648 } 2649 2650 /* 2651 * It is not necessary to reset these timers if any link does not 2652 * have an active CSA and that link still receives the beacons 2653 * when other links have active CSA. 2654 */ 2655 for_each_link_data(sdata, link) { 2656 if (!link->conf->csa_active) 2657 return; 2658 } 2659 2660 /* 2661 * Reset the beacon monitor and connection monitor timers when CSA 2662 * is active for all links in MLO when channel switch occurs in all 2663 * the links. 2664 */ 2665 ieee80211_sta_reset_beacon_monitor(sdata); 2666 ieee80211_sta_reset_conn_monitor(sdata); 2667 } 2668 2669 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2670 { 2671 struct ieee80211_sub_if_data *sdata = link->sdata; 2672 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2673 int ret; 2674 2675 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2676 2677 WARN_ON(!link->conf->csa_active); 2678 2679 ieee80211_vif_unblock_queues_csa(sdata); 2680 2681 link->conf->csa_active = false; 2682 link->u.mgd.csa.blocked_tx = false; 2683 link->u.mgd.csa.waiting_bcn = false; 2684 2685 ret = drv_post_channel_switch(link); 2686 if (ret) { 2687 link_info(link, 2688 "driver post channel switch failed, disconnecting\n"); 2689 wiphy_work_queue(sdata->local->hw.wiphy, 2690 &ifmgd->csa_connection_drop_work); 2691 return; 2692 } 2693 2694 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2695 link->link_id); 2696 } 2697 2698 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2699 unsigned int link_id) 2700 { 2701 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2702 2703 trace_api_chswitch_done(sdata, success, link_id); 2704 2705 rcu_read_lock(); 2706 2707 if (!success) { 2708 sdata_info(sdata, 2709 "driver channel switch failed (link %d), disconnecting\n", 2710 link_id); 2711 wiphy_work_queue(sdata->local->hw.wiphy, 2712 &sdata->u.mgd.csa_connection_drop_work); 2713 } else { 2714 struct ieee80211_link_data *link = 2715 rcu_dereference(sdata->link[link_id]); 2716 2717 if (WARN_ON(!link)) { 2718 rcu_read_unlock(); 2719 return; 2720 } 2721 2722 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 2723 &link->u.mgd.csa.switch_work, 0); 2724 } 2725 2726 rcu_read_unlock(); 2727 } 2728 EXPORT_SYMBOL(ieee80211_chswitch_done); 2729 2730 static void 2731 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2732 { 2733 struct ieee80211_sub_if_data *sdata = link->sdata; 2734 struct ieee80211_local *local = sdata->local; 2735 2736 lockdep_assert_wiphy(local->hw.wiphy); 2737 2738 if (!local->ops->abort_channel_switch) 2739 return; 2740 2741 if (rcu_access_pointer(link->conf->chanctx_conf)) 2742 ieee80211_link_unreserve_chanctx(link); 2743 2744 ieee80211_vif_unblock_queues_csa(sdata); 2745 2746 link->conf->csa_active = false; 2747 link->u.mgd.csa.blocked_tx = false; 2748 2749 drv_abort_channel_switch(link); 2750 } 2751 2752 struct sta_csa_rnr_iter_data { 2753 struct ieee80211_link_data *link; 2754 struct ieee80211_channel *chan; 2755 u8 mld_id; 2756 }; 2757 2758 static enum cfg80211_rnr_iter_ret 2759 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2760 const struct ieee80211_neighbor_ap_info *info, 2761 const u8 *tbtt_info, u8 tbtt_info_len) 2762 { 2763 struct sta_csa_rnr_iter_data *data = _data; 2764 struct ieee80211_link_data *link = data->link; 2765 struct ieee80211_sub_if_data *sdata = link->sdata; 2766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2767 const struct ieee80211_tbtt_info_ge_11 *ti; 2768 enum nl80211_band band; 2769 unsigned int center_freq; 2770 int link_id; 2771 2772 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2773 return RNR_ITER_CONTINUE; 2774 2775 if (tbtt_info_len < sizeof(*ti)) 2776 return RNR_ITER_CONTINUE; 2777 2778 ti = (const void *)tbtt_info; 2779 2780 if (ti->mld_params.mld_id != data->mld_id) 2781 return RNR_ITER_CONTINUE; 2782 2783 link_id = le16_get_bits(ti->mld_params.params, 2784 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2785 if (link_id != data->link->link_id) 2786 return RNR_ITER_CONTINUE; 2787 2788 /* we found the entry for our link! */ 2789 2790 /* this AP is confused, it had this right before ... just disconnect */ 2791 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2792 link_info(link, 2793 "AP now has invalid operating class in RNR, disconnect\n"); 2794 wiphy_work_queue(sdata->local->hw.wiphy, 2795 &ifmgd->csa_connection_drop_work); 2796 return RNR_ITER_BREAK; 2797 } 2798 2799 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2800 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2801 2802 return RNR_ITER_BREAK; 2803 } 2804 2805 static void 2806 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2807 struct ieee802_11_elems *elems) 2808 { 2809 struct ieee80211_sub_if_data *sdata = link->sdata; 2810 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2811 struct sta_csa_rnr_iter_data data = { 2812 .link = link, 2813 }; 2814 2815 /* 2816 * If we get here, we see a beacon from another link without 2817 * CSA still being reported for it, so now we have to check 2818 * if the CSA was aborted or completed. This may not even be 2819 * perfectly possible if the CSA was only done for changing 2820 * the puncturing, but in that case if the link in inactive 2821 * we don't really care, and if it's an active link (or when 2822 * it's activated later) we'll get a beacon and adjust. 2823 */ 2824 2825 if (WARN_ON(!elems->ml_basic)) 2826 return; 2827 2828 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2829 2830 /* 2831 * So in order to do this, iterate the RNR element(s) and see 2832 * what channel is reported now. 2833 */ 2834 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2835 ieee80211_sta_csa_rnr_iter, &data); 2836 2837 if (!data.chan) { 2838 link_info(link, 2839 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2840 wiphy_work_queue(sdata->local->hw.wiphy, 2841 &ifmgd->csa_connection_drop_work); 2842 return; 2843 } 2844 2845 /* 2846 * If it doesn't match the CSA, then assume it aborted. This 2847 * may erroneously detect that it was _not_ aborted when it 2848 * was in fact aborted, but only changed the bandwidth or the 2849 * puncturing configuration, but we don't have enough data to 2850 * detect that. 2851 */ 2852 if (data.chan != link->csa.chanreq.oper.chan) 2853 ieee80211_sta_abort_chanswitch(link); 2854 } 2855 2856 enum ieee80211_csa_source { 2857 IEEE80211_CSA_SOURCE_BEACON, 2858 IEEE80211_CSA_SOURCE_OTHER_LINK, 2859 IEEE80211_CSA_SOURCE_PROT_ACTION, 2860 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2861 }; 2862 2863 static void 2864 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2865 u64 timestamp, u32 device_timestamp, 2866 struct ieee802_11_elems *full_elems, 2867 struct ieee802_11_elems *csa_elems, 2868 enum ieee80211_csa_source source) 2869 { 2870 struct ieee80211_sub_if_data *sdata = link->sdata; 2871 struct ieee80211_local *local = sdata->local; 2872 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2873 struct ieee80211_chanctx *chanctx = NULL; 2874 struct ieee80211_chanctx_conf *conf; 2875 struct ieee80211_csa_ie csa_ie = {}; 2876 struct ieee80211_channel_switch ch_switch = { 2877 .link_id = link->link_id, 2878 .timestamp = timestamp, 2879 .device_timestamp = device_timestamp, 2880 }; 2881 u32 csa_time_tu; 2882 ktime_t now; 2883 int res; 2884 2885 lockdep_assert_wiphy(local->hw.wiphy); 2886 2887 if (csa_elems) { 2888 struct cfg80211_bss *cbss = link->conf->bss; 2889 enum nl80211_band current_band; 2890 struct ieee80211_bss *bss; 2891 2892 if (WARN_ON(!cbss)) 2893 return; 2894 2895 current_band = cbss->channel->band; 2896 bss = (void *)cbss->priv; 2897 2898 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2899 current_band, 2900 bss->vht_cap_info, 2901 &link->u.mgd.conn, 2902 link->u.mgd.bssid, 2903 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2904 &csa_ie); 2905 if (res == 0) { 2906 ch_switch.block_tx = csa_ie.mode; 2907 ch_switch.chandef = csa_ie.chanreq.oper; 2908 ch_switch.count = csa_ie.count; 2909 ch_switch.delay = csa_ie.max_switch_time; 2910 } 2911 2912 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2913 } else { 2914 /* 2915 * If there was no per-STA profile for this link, we 2916 * get called with csa_elems == NULL. This of course means 2917 * there are no CSA elements, so set res=1 indicating 2918 * no more CSA. 2919 */ 2920 res = 1; 2921 } 2922 2923 if (res < 0) { 2924 /* ignore this case, not a protected frame */ 2925 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2926 return; 2927 goto drop_connection; 2928 } 2929 2930 if (link->conf->csa_active) { 2931 switch (source) { 2932 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2933 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2934 /* already processing - disregard action frames */ 2935 return; 2936 case IEEE80211_CSA_SOURCE_BEACON: 2937 if (link->u.mgd.csa.waiting_bcn) { 2938 ieee80211_chswitch_post_beacon(link); 2939 /* 2940 * If the CSA is still present after the switch 2941 * we need to consider it as a new CSA (possibly 2942 * to self). This happens by not returning here 2943 * so we'll get to the check below. 2944 */ 2945 } else if (res) { 2946 ieee80211_sta_abort_chanswitch(link); 2947 return; 2948 } else { 2949 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2950 return; 2951 } 2952 break; 2953 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2954 /* active link: we want to see the beacon to continue */ 2955 if (ieee80211_vif_link_active(&sdata->vif, 2956 link->link_id)) 2957 return; 2958 2959 /* switch work ran, so just complete the process */ 2960 if (link->u.mgd.csa.waiting_bcn) { 2961 ieee80211_chswitch_post_beacon(link); 2962 /* 2963 * If the CSA is still present after the switch 2964 * we need to consider it as a new CSA (possibly 2965 * to self). This happens by not returning here 2966 * so we'll get to the check below. 2967 */ 2968 break; 2969 } 2970 2971 /* link still has CSA but we already know, do nothing */ 2972 if (!res) 2973 return; 2974 2975 /* check in the RNR if the CSA aborted */ 2976 ieee80211_sta_other_link_csa_disappeared(link, 2977 full_elems); 2978 return; 2979 } 2980 } 2981 2982 /* no active CSA nor a new one */ 2983 if (res) { 2984 /* 2985 * However, we may have stopped queues when receiving a public 2986 * action frame that couldn't be protected, if it had the quiet 2987 * bit set. This is a trade-off, we want to be quiet as soon as 2988 * possible, but also don't trust the public action frame much, 2989 * as it can't be protected. 2990 */ 2991 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2992 link->u.mgd.csa.blocked_tx = false; 2993 ieee80211_vif_unblock_queues_csa(sdata); 2994 } 2995 return; 2996 } 2997 2998 /* 2999 * We don't really trust public action frames, but block queues (go to 3000 * quiet mode) for them anyway, we should get a beacon soon to either 3001 * know what the CSA really is, or figure out the public action frame 3002 * was actually an attack. 3003 */ 3004 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 3005 if (csa_ie.mode) { 3006 link->u.mgd.csa.blocked_tx = true; 3007 ieee80211_vif_block_queues_csa(sdata); 3008 } 3009 return; 3010 } 3011 3012 if (link->conf->chanreq.oper.chan->band != 3013 csa_ie.chanreq.oper.chan->band) { 3014 link_info(link, 3015 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 3016 link->u.mgd.bssid, 3017 csa_ie.chanreq.oper.chan->center_freq, 3018 csa_ie.chanreq.oper.width, 3019 csa_ie.chanreq.oper.center_freq1, 3020 csa_ie.chanreq.oper.center_freq2); 3021 goto drop_connection; 3022 } 3023 3024 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 3025 IEEE80211_CHAN_DISABLED)) { 3026 link_info(link, 3027 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 3028 link->u.mgd.bssid, 3029 csa_ie.chanreq.oper.chan->center_freq, 3030 csa_ie.chanreq.oper.chan->freq_offset, 3031 csa_ie.chanreq.oper.width, 3032 csa_ie.chanreq.oper.center_freq1, 3033 csa_ie.chanreq.oper.freq1_offset, 3034 csa_ie.chanreq.oper.center_freq2); 3035 goto drop_connection; 3036 } 3037 3038 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 3039 &link->conf->chanreq.oper) && 3040 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 3041 if (link->u.mgd.csa.ignored_same_chan) 3042 return; 3043 link_info(link, 3044 "AP %pM tries to chanswitch to same channel, ignore\n", 3045 link->u.mgd.bssid); 3046 link->u.mgd.csa.ignored_same_chan = true; 3047 return; 3048 } 3049 3050 /* 3051 * Drop all TDLS peers on the affected link - either we disconnect or 3052 * move to a different channel from this point on. There's no telling 3053 * what our peer will do. 3054 * The TDLS WIDER_BW scenario is also problematic, as peers might now 3055 * have an incompatible wider chandef. 3056 */ 3057 ieee80211_teardown_tdls_peers(link); 3058 3059 conf = rcu_dereference_protected(link->conf->chanctx_conf, 3060 lockdep_is_held(&local->hw.wiphy->mtx)); 3061 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 3062 link_info(link, 3063 "no channel context assigned to vif?, disconnecting\n"); 3064 goto drop_connection; 3065 } 3066 3067 if (conf) 3068 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 3069 3070 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 3071 link_info(link, 3072 "driver doesn't support chan-switch with channel contexts\n"); 3073 goto drop_connection; 3074 } 3075 3076 if (drv_pre_channel_switch(sdata, &ch_switch)) { 3077 link_info(link, 3078 "preparing for channel switch failed, disconnecting\n"); 3079 goto drop_connection; 3080 } 3081 3082 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 3083 3084 link->csa.chanreq.oper = csa_ie.chanreq.oper; 3085 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 3086 &csa_ie.chanreq.ap); 3087 3088 if (chanctx) { 3089 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 3090 chanctx->mode, false); 3091 if (res) { 3092 link_info(link, 3093 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 3094 res); 3095 goto drop_connection; 3096 } 3097 } 3098 3099 link->conf->csa_active = true; 3100 link->u.mgd.csa.ignored_same_chan = false; 3101 link->u.mgd.beacon_crc_valid = false; 3102 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3103 3104 if (csa_ie.mode) 3105 ieee80211_vif_block_queues_csa(sdata); 3106 3107 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 3108 link->link_id, csa_ie.count, 3109 csa_ie.mode); 3110 3111 /* we may have to handle timeout for deactivated link in software */ 3112 now = ktime_get_boottime(); 3113 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 3114 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 3115 3116 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3117 local->ops->channel_switch) { 3118 /* 3119 * Use driver's channel switch callback, the driver will 3120 * later call ieee80211_chswitch_done(). It may deactivate 3121 * the link as well, we handle that elsewhere and queue 3122 * the csa.switch_work for the calculated time then. 3123 */ 3124 drv_channel_switch(local, sdata, &ch_switch); 3125 return; 3126 } 3127 3128 /* channel switch handled in software */ 3129 wiphy_hrtimer_work_queue(local->hw.wiphy, 3130 &link->u.mgd.csa.switch_work, 3131 link->u.mgd.csa.time - now); 3132 return; 3133 drop_connection: 3134 /* 3135 * This is just so that the disconnect flow will know that 3136 * we were trying to switch channel and failed. In case the 3137 * mode is 1 (we are not allowed to Tx), we will know not to 3138 * send a deauthentication frame. Those two fields will be 3139 * reset when the disconnection worker runs. 3140 */ 3141 link->conf->csa_active = true; 3142 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3143 3144 wiphy_work_queue(sdata->local->hw.wiphy, 3145 &ifmgd->csa_connection_drop_work); 3146 } 3147 3148 struct sta_bss_param_ch_cnt_data { 3149 struct ieee80211_sub_if_data *sdata; 3150 u8 reporting_link_id; 3151 u8 mld_id; 3152 }; 3153 3154 static enum cfg80211_rnr_iter_ret 3155 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3156 const struct ieee80211_neighbor_ap_info *info, 3157 const u8 *tbtt_info, u8 tbtt_info_len) 3158 { 3159 struct sta_bss_param_ch_cnt_data *data = _data; 3160 struct ieee80211_sub_if_data *sdata = data->sdata; 3161 const struct ieee80211_tbtt_info_ge_11 *ti; 3162 u8 bss_param_ch_cnt; 3163 int link_id; 3164 3165 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3166 return RNR_ITER_CONTINUE; 3167 3168 if (tbtt_info_len < sizeof(*ti)) 3169 return RNR_ITER_CONTINUE; 3170 3171 ti = (const void *)tbtt_info; 3172 3173 if (ti->mld_params.mld_id != data->mld_id) 3174 return RNR_ITER_CONTINUE; 3175 3176 link_id = le16_get_bits(ti->mld_params.params, 3177 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3178 bss_param_ch_cnt = 3179 le16_get_bits(ti->mld_params.params, 3180 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3181 3182 if (bss_param_ch_cnt != 255 && 3183 link_id < ARRAY_SIZE(sdata->link)) { 3184 struct ieee80211_link_data *link = 3185 sdata_dereference(sdata->link[link_id], sdata); 3186 3187 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3188 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3189 link->conf->bss_param_ch_cnt_link_id = 3190 data->reporting_link_id; 3191 } 3192 } 3193 3194 return RNR_ITER_CONTINUE; 3195 } 3196 3197 static void 3198 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3199 struct ieee80211_bss_conf *bss_conf, 3200 struct ieee802_11_elems *elems) 3201 { 3202 struct sta_bss_param_ch_cnt_data data = { 3203 .reporting_link_id = bss_conf->link_id, 3204 .sdata = sdata, 3205 }; 3206 int bss_param_ch_cnt; 3207 3208 if (!elems->ml_basic) 3209 return; 3210 3211 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3212 3213 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3214 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3215 3216 bss_param_ch_cnt = 3217 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3218 3219 /* 3220 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3221 * didn't change to indicate that we got a beacon on our own 3222 * link. 3223 */ 3224 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3225 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3226 bss_conf->bss_param_ch_cnt_link_id = 3227 bss_conf->link_id; 3228 } 3229 } 3230 3231 static bool 3232 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3233 const u8 *country_ie, u8 country_ie_len, 3234 const u8 *pwr_constr_elem, 3235 int *chan_pwr, int *pwr_reduction) 3236 { 3237 struct ieee80211_country_ie_triplet *triplet; 3238 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3239 int i, chan_increment; 3240 bool have_chan_pwr = false; 3241 3242 /* Invalid IE */ 3243 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3244 return false; 3245 3246 triplet = (void *)(country_ie + 3); 3247 country_ie_len -= 3; 3248 3249 switch (channel->band) { 3250 default: 3251 WARN_ON_ONCE(1); 3252 fallthrough; 3253 case NL80211_BAND_2GHZ: 3254 case NL80211_BAND_60GHZ: 3255 case NL80211_BAND_LC: 3256 chan_increment = 1; 3257 break; 3258 case NL80211_BAND_5GHZ: 3259 chan_increment = 4; 3260 break; 3261 case NL80211_BAND_6GHZ: 3262 /* 3263 * In the 6 GHz band, the "maximum transmit power level" 3264 * field in the triplets is reserved, and thus will be 3265 * zero and we shouldn't use it to control TX power. 3266 * The actual TX power will be given in the transmit 3267 * power envelope element instead. 3268 */ 3269 return false; 3270 } 3271 3272 /* find channel */ 3273 while (country_ie_len >= 3) { 3274 u8 first_channel = triplet->chans.first_channel; 3275 3276 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3277 goto next; 3278 3279 for (i = 0; i < triplet->chans.num_channels; i++) { 3280 if (first_channel + i * chan_increment == chan) { 3281 have_chan_pwr = true; 3282 *chan_pwr = triplet->chans.max_power; 3283 break; 3284 } 3285 } 3286 if (have_chan_pwr) 3287 break; 3288 3289 next: 3290 triplet++; 3291 country_ie_len -= 3; 3292 } 3293 3294 if (have_chan_pwr && pwr_constr_elem) 3295 *pwr_reduction = *pwr_constr_elem; 3296 else 3297 *pwr_reduction = 0; 3298 3299 return have_chan_pwr; 3300 } 3301 3302 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3303 const u8 *cisco_dtpc_ie, 3304 int *pwr_level) 3305 { 3306 /* From practical testing, the first data byte of the DTPC element 3307 * seems to contain the requested dBm level, and the CLI on Cisco 3308 * APs clearly state the range is -127 to 127 dBm, which indicates 3309 * a signed byte, although it seemingly never actually goes negative. 3310 * The other byte seems to always be zero. 3311 */ 3312 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3313 } 3314 3315 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3316 struct ieee80211_channel *channel, 3317 struct ieee80211_mgmt *mgmt, 3318 const u8 *country_ie, u8 country_ie_len, 3319 const u8 *pwr_constr_ie, 3320 const u8 *cisco_dtpc_ie) 3321 { 3322 struct ieee80211_sub_if_data *sdata = link->sdata; 3323 bool has_80211h_pwr = false, has_cisco_pwr = false; 3324 int chan_pwr = 0, pwr_reduction_80211h = 0; 3325 int pwr_level_cisco, pwr_level_80211h; 3326 int new_ap_level; 3327 __le16 capab = mgmt->u.probe_resp.capab_info; 3328 3329 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3330 return 0; /* TODO */ 3331 3332 if (country_ie && 3333 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3334 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3335 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3336 channel, country_ie, country_ie_len, 3337 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3338 pwr_level_80211h = 3339 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3340 } 3341 3342 if (cisco_dtpc_ie) { 3343 ieee80211_find_cisco_dtpc( 3344 channel, cisco_dtpc_ie, &pwr_level_cisco); 3345 has_cisco_pwr = true; 3346 } 3347 3348 if (!has_80211h_pwr && !has_cisco_pwr) 3349 return 0; 3350 3351 /* If we have both 802.11h and Cisco DTPC, apply both limits 3352 * by picking the smallest of the two power levels advertised. 3353 */ 3354 if (has_80211h_pwr && 3355 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3356 new_ap_level = pwr_level_80211h; 3357 3358 if (link->ap_power_level == new_ap_level) 3359 return 0; 3360 3361 sdata_dbg(sdata, 3362 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3363 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3364 link->u.mgd.bssid); 3365 } else { /* has_cisco_pwr is always true here. */ 3366 new_ap_level = pwr_level_cisco; 3367 3368 if (link->ap_power_level == new_ap_level) 3369 return 0; 3370 3371 sdata_dbg(sdata, 3372 "Limiting TX power to %d dBm as advertised by %pM\n", 3373 pwr_level_cisco, link->u.mgd.bssid); 3374 } 3375 3376 link->ap_power_level = new_ap_level; 3377 if (__ieee80211_recalc_txpower(link)) 3378 return BSS_CHANGED_TXPOWER; 3379 return 0; 3380 } 3381 3382 /* powersave */ 3383 static void ieee80211_enable_ps(struct ieee80211_local *local, 3384 struct ieee80211_sub_if_data *sdata) 3385 { 3386 struct ieee80211_conf *conf = &local->hw.conf; 3387 3388 /* 3389 * If we are scanning right now then the parameters will 3390 * take effect when scan finishes. 3391 */ 3392 if (local->scanning) 3393 return; 3394 3395 if (conf->dynamic_ps_timeout > 0 && 3396 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3397 mod_timer(&local->dynamic_ps_timer, jiffies + 3398 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3399 } else { 3400 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3401 ieee80211_send_nullfunc(local, sdata, true); 3402 3403 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3404 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3405 return; 3406 3407 conf->flags |= IEEE80211_CONF_PS; 3408 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3409 } 3410 } 3411 3412 static void ieee80211_change_ps(struct ieee80211_local *local) 3413 { 3414 struct ieee80211_conf *conf = &local->hw.conf; 3415 3416 if (local->ps_sdata) { 3417 ieee80211_enable_ps(local, local->ps_sdata); 3418 } else if (conf->flags & IEEE80211_CONF_PS) { 3419 conf->flags &= ~IEEE80211_CONF_PS; 3420 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3421 timer_delete_sync(&local->dynamic_ps_timer); 3422 wiphy_work_cancel(local->hw.wiphy, 3423 &local->dynamic_ps_enable_work); 3424 } 3425 } 3426 3427 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3428 { 3429 struct ieee80211_local *local = sdata->local; 3430 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3431 struct sta_info *sta = NULL; 3432 bool authorized = false; 3433 3434 if (!mgd->powersave) 3435 return false; 3436 3437 if (mgd->broken_ap) 3438 return false; 3439 3440 if (!mgd->associated) 3441 return false; 3442 3443 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3444 return false; 3445 3446 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3447 !sdata->deflink.u.mgd.have_beacon) 3448 return false; 3449 3450 rcu_read_lock(); 3451 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3452 if (sta) 3453 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3454 rcu_read_unlock(); 3455 3456 return authorized; 3457 } 3458 3459 /* need to hold RTNL or interface lock */ 3460 void ieee80211_recalc_ps(struct ieee80211_local *local) 3461 { 3462 struct ieee80211_sub_if_data *sdata, *found = NULL; 3463 int count = 0; 3464 int timeout; 3465 3466 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3467 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3468 local->ps_sdata = NULL; 3469 return; 3470 } 3471 3472 list_for_each_entry(sdata, &local->interfaces, list) { 3473 if (!ieee80211_sdata_running(sdata)) 3474 continue; 3475 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3476 /* If an AP vif is found, then disable PS 3477 * by setting the count to zero thereby setting 3478 * ps_sdata to NULL. 3479 */ 3480 count = 0; 3481 break; 3482 } 3483 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3484 continue; 3485 found = sdata; 3486 count++; 3487 } 3488 3489 if (count == 1 && ieee80211_powersave_allowed(found)) { 3490 u8 dtimper = found->deflink.u.mgd.dtim_period; 3491 3492 timeout = local->dynamic_ps_forced_timeout; 3493 if (timeout < 0) 3494 timeout = 100; 3495 local->hw.conf.dynamic_ps_timeout = timeout; 3496 3497 /* If the TIM IE is invalid, pretend the value is 1 */ 3498 if (!dtimper) 3499 dtimper = 1; 3500 3501 local->hw.conf.ps_dtim_period = dtimper; 3502 local->ps_sdata = found; 3503 } else { 3504 local->ps_sdata = NULL; 3505 } 3506 3507 ieee80211_change_ps(local); 3508 } 3509 3510 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3511 { 3512 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3513 3514 if (sdata->vif.cfg.ps != ps_allowed) { 3515 sdata->vif.cfg.ps = ps_allowed; 3516 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3517 } 3518 } 3519 3520 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3521 struct wiphy_work *work) 3522 { 3523 struct ieee80211_local *local = 3524 container_of(work, struct ieee80211_local, 3525 dynamic_ps_disable_work); 3526 3527 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3528 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3529 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3530 } 3531 3532 ieee80211_wake_queues_by_reason(&local->hw, 3533 IEEE80211_MAX_QUEUE_MAP, 3534 IEEE80211_QUEUE_STOP_REASON_PS, 3535 false); 3536 } 3537 3538 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3539 struct wiphy_work *work) 3540 { 3541 struct ieee80211_local *local = 3542 container_of(work, struct ieee80211_local, 3543 dynamic_ps_enable_work); 3544 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3545 struct ieee80211_if_managed *ifmgd; 3546 unsigned long flags; 3547 int q; 3548 3549 /* can only happen when PS was just disabled anyway */ 3550 if (!sdata) 3551 return; 3552 3553 ifmgd = &sdata->u.mgd; 3554 3555 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3556 return; 3557 3558 if (local->hw.conf.dynamic_ps_timeout > 0) { 3559 /* don't enter PS if TX frames are pending */ 3560 if (drv_tx_frames_pending(local)) { 3561 mod_timer(&local->dynamic_ps_timer, jiffies + 3562 msecs_to_jiffies( 3563 local->hw.conf.dynamic_ps_timeout)); 3564 return; 3565 } 3566 3567 /* 3568 * transmission can be stopped by others which leads to 3569 * dynamic_ps_timer expiry. Postpone the ps timer if it 3570 * is not the actual idle state. 3571 */ 3572 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3573 for (q = 0; q < local->hw.queues; q++) { 3574 if (local->queue_stop_reasons[q]) { 3575 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3576 flags); 3577 mod_timer(&local->dynamic_ps_timer, jiffies + 3578 msecs_to_jiffies( 3579 local->hw.conf.dynamic_ps_timeout)); 3580 return; 3581 } 3582 } 3583 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3584 } 3585 3586 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3587 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3588 if (drv_tx_frames_pending(local)) { 3589 mod_timer(&local->dynamic_ps_timer, jiffies + 3590 msecs_to_jiffies( 3591 local->hw.conf.dynamic_ps_timeout)); 3592 } else { 3593 ieee80211_send_nullfunc(local, sdata, true); 3594 /* Flush to get the tx status of nullfunc frame */ 3595 ieee80211_flush_queues(local, sdata, false); 3596 } 3597 } 3598 3599 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3600 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3601 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3602 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3603 local->hw.conf.flags |= IEEE80211_CONF_PS; 3604 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3605 } 3606 } 3607 3608 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3609 { 3610 struct ieee80211_local *local = timer_container_of(local, t, 3611 dynamic_ps_timer); 3612 3613 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3614 } 3615 3616 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3617 { 3618 struct ieee80211_link_data *link = 3619 container_of(work, struct ieee80211_link_data, 3620 dfs_cac_timer_work.work); 3621 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3622 struct ieee80211_sub_if_data *sdata = link->sdata; 3623 3624 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3625 3626 if (sdata->wdev.links[link->link_id].cac_started) { 3627 ieee80211_link_release_channel(link); 3628 cfg80211_cac_event(sdata->dev, &chandef, 3629 NL80211_RADAR_CAC_FINISHED, 3630 GFP_KERNEL, link->link_id); 3631 } 3632 } 3633 3634 static bool 3635 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3636 { 3637 struct ieee80211_local *local = sdata->local; 3638 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3639 bool ret = false; 3640 int ac; 3641 3642 if (local->hw.queues < IEEE80211_NUM_ACS) 3643 return false; 3644 3645 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3646 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3647 int non_acm_ac; 3648 unsigned long now = jiffies; 3649 3650 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3651 tx_tspec->admitted_time && 3652 time_after(now, tx_tspec->time_slice_start + HZ)) { 3653 tx_tspec->consumed_tx_time = 0; 3654 tx_tspec->time_slice_start = now; 3655 3656 if (tx_tspec->downgraded) 3657 tx_tspec->action = 3658 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3659 } 3660 3661 switch (tx_tspec->action) { 3662 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3663 /* take the original parameters */ 3664 if (drv_conf_tx(local, &sdata->deflink, ac, 3665 &sdata->deflink.tx_conf[ac])) 3666 link_err(&sdata->deflink, 3667 "failed to set TX queue parameters for queue %d\n", 3668 ac); 3669 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3670 tx_tspec->downgraded = false; 3671 ret = true; 3672 break; 3673 case TX_TSPEC_ACTION_DOWNGRADE: 3674 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3675 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3676 ret = true; 3677 break; 3678 } 3679 /* downgrade next lower non-ACM AC */ 3680 for (non_acm_ac = ac + 1; 3681 non_acm_ac < IEEE80211_NUM_ACS; 3682 non_acm_ac++) 3683 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3684 break; 3685 /* Usually the loop will result in using BK even if it 3686 * requires admission control, but such a configuration 3687 * makes no sense and we have to transmit somehow - the 3688 * AC selection does the same thing. 3689 * If we started out trying to downgrade from BK, then 3690 * the extra condition here might be needed. 3691 */ 3692 if (non_acm_ac >= IEEE80211_NUM_ACS) 3693 non_acm_ac = IEEE80211_AC_BK; 3694 if (drv_conf_tx(local, &sdata->deflink, ac, 3695 &sdata->deflink.tx_conf[non_acm_ac])) 3696 link_err(&sdata->deflink, 3697 "failed to set TX queue parameters for queue %d\n", 3698 ac); 3699 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3700 ret = true; 3701 wiphy_delayed_work_queue(local->hw.wiphy, 3702 &ifmgd->tx_tspec_wk, 3703 tx_tspec->time_slice_start + 3704 HZ - now + 1); 3705 break; 3706 case TX_TSPEC_ACTION_NONE: 3707 /* nothing now */ 3708 break; 3709 } 3710 } 3711 3712 return ret; 3713 } 3714 3715 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3716 { 3717 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3718 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3719 BSS_CHANGED_QOS); 3720 } 3721 3722 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3723 struct wiphy_work *work) 3724 { 3725 struct ieee80211_sub_if_data *sdata; 3726 3727 sdata = container_of(work, struct ieee80211_sub_if_data, 3728 u.mgd.tx_tspec_wk.work); 3729 ieee80211_sta_handle_tspec_ac_params(sdata); 3730 } 3731 3732 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3733 { 3734 struct ieee80211_sub_if_data *sdata = link->sdata; 3735 struct ieee80211_local *local = sdata->local; 3736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3737 struct ieee80211_tx_queue_params *params = link->tx_conf; 3738 u8 ac; 3739 3740 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3741 mlme_dbg(sdata, 3742 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3743 ac, params[ac].acm, 3744 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3745 params[ac].txop, params[ac].uapsd, 3746 ifmgd->tx_tspec[ac].downgraded); 3747 if (!ifmgd->tx_tspec[ac].downgraded && 3748 drv_conf_tx(local, link, ac, ¶ms[ac])) 3749 link_err(link, 3750 "failed to set TX queue parameters for AC %d\n", 3751 ac); 3752 } 3753 } 3754 3755 /* MLME */ 3756 static bool 3757 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3758 struct ieee80211_link_data *link, 3759 const u8 *wmm_param, size_t wmm_param_len, 3760 const struct ieee80211_mu_edca_param_set *mu_edca) 3761 { 3762 struct ieee80211_sub_if_data *sdata = link->sdata; 3763 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3764 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3765 size_t left; 3766 int count, mu_edca_count, ac; 3767 const u8 *pos; 3768 u8 uapsd_queues = 0; 3769 3770 if (!local->ops->conf_tx) 3771 return false; 3772 3773 if (local->hw.queues < IEEE80211_NUM_ACS) 3774 return false; 3775 3776 if (!wmm_param) 3777 return false; 3778 3779 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3780 return false; 3781 3782 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3783 uapsd_queues = ifmgd->uapsd_queues; 3784 3785 count = wmm_param[6] & 0x0f; 3786 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3787 * if mu_edca was preset before and now it disappeared tell 3788 * the driver about it. 3789 */ 3790 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3791 if (count == link->u.mgd.wmm_last_param_set && 3792 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3793 return false; 3794 link->u.mgd.wmm_last_param_set = count; 3795 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3796 3797 pos = wmm_param + 8; 3798 left = wmm_param_len - 8; 3799 3800 memset(¶ms, 0, sizeof(params)); 3801 3802 sdata->wmm_acm = 0; 3803 for (; left >= 4; left -= 4, pos += 4) { 3804 int aci = (pos[0] >> 5) & 0x03; 3805 int acm = (pos[0] >> 4) & 0x01; 3806 bool uapsd = false; 3807 3808 switch (aci) { 3809 case 1: /* AC_BK */ 3810 ac = IEEE80211_AC_BK; 3811 if (acm) 3812 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3813 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3814 uapsd = true; 3815 params[ac].mu_edca = !!mu_edca; 3816 if (mu_edca) 3817 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3818 break; 3819 case 2: /* AC_VI */ 3820 ac = IEEE80211_AC_VI; 3821 if (acm) 3822 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3823 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3824 uapsd = true; 3825 params[ac].mu_edca = !!mu_edca; 3826 if (mu_edca) 3827 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3828 break; 3829 case 3: /* AC_VO */ 3830 ac = IEEE80211_AC_VO; 3831 if (acm) 3832 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3833 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3834 uapsd = true; 3835 params[ac].mu_edca = !!mu_edca; 3836 if (mu_edca) 3837 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3838 break; 3839 case 0: /* AC_BE */ 3840 default: 3841 ac = IEEE80211_AC_BE; 3842 if (acm) 3843 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3844 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3845 uapsd = true; 3846 params[ac].mu_edca = !!mu_edca; 3847 if (mu_edca) 3848 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3849 break; 3850 } 3851 3852 params[ac].aifs = pos[0] & 0x0f; 3853 3854 if (params[ac].aifs < 2) { 3855 link_info(link, 3856 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3857 params[ac].aifs, aci); 3858 params[ac].aifs = 2; 3859 } 3860 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3861 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3862 params[ac].txop = get_unaligned_le16(pos + 2); 3863 params[ac].acm = acm; 3864 params[ac].uapsd = uapsd; 3865 3866 if (params[ac].cw_min == 0 || 3867 params[ac].cw_min > params[ac].cw_max) { 3868 link_info(link, 3869 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3870 params[ac].cw_min, params[ac].cw_max, aci); 3871 return false; 3872 } 3873 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3874 } 3875 3876 /* WMM specification requires all 4 ACIs. */ 3877 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3878 if (params[ac].cw_min == 0) { 3879 link_info(link, 3880 "AP has invalid WMM params (missing AC %d), using defaults\n", 3881 ac); 3882 return false; 3883 } 3884 } 3885 3886 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3887 link->tx_conf[ac] = params[ac]; 3888 3889 return true; 3890 } 3891 3892 static bool 3893 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3894 struct ieee80211_link_data *link, 3895 const u8 *wmm_param, size_t wmm_param_len, 3896 const struct ieee80211_mu_edca_param_set *mu_edca) 3897 { 3898 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3899 mu_edca)) 3900 return false; 3901 3902 ieee80211_mgd_set_link_qos_params(link); 3903 3904 /* enable WMM or activate new settings */ 3905 link->conf->qos = true; 3906 return true; 3907 } 3908 3909 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3910 { 3911 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3912 3913 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3914 ieee80211_run_deferred_scan(sdata->local); 3915 } 3916 3917 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3918 { 3919 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3920 3921 __ieee80211_stop_poll(sdata); 3922 } 3923 3924 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3925 u16 capab, bool erp_valid, u8 erp) 3926 { 3927 struct ieee80211_bss_conf *bss_conf = link->conf; 3928 struct ieee80211_supported_band *sband; 3929 u64 changed = 0; 3930 bool use_protection; 3931 bool use_short_preamble; 3932 bool use_short_slot; 3933 3934 sband = ieee80211_get_link_sband(link); 3935 if (!sband) 3936 return changed; 3937 3938 if (erp_valid) { 3939 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3940 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3941 } else { 3942 use_protection = false; 3943 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3944 } 3945 3946 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3947 if (sband->band == NL80211_BAND_5GHZ || 3948 sband->band == NL80211_BAND_6GHZ) 3949 use_short_slot = true; 3950 3951 if (use_protection != bss_conf->use_cts_prot) { 3952 bss_conf->use_cts_prot = use_protection; 3953 changed |= BSS_CHANGED_ERP_CTS_PROT; 3954 } 3955 3956 if (use_short_preamble != bss_conf->use_short_preamble) { 3957 bss_conf->use_short_preamble = use_short_preamble; 3958 changed |= BSS_CHANGED_ERP_PREAMBLE; 3959 } 3960 3961 if (use_short_slot != bss_conf->use_short_slot) { 3962 bss_conf->use_short_slot = use_short_slot; 3963 changed |= BSS_CHANGED_ERP_SLOT; 3964 } 3965 3966 return changed; 3967 } 3968 3969 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3970 struct cfg80211_bss *cbss) 3971 { 3972 struct ieee80211_sub_if_data *sdata = link->sdata; 3973 struct ieee80211_bss_conf *bss_conf = link->conf; 3974 struct ieee80211_bss *bss = (void *)cbss->priv; 3975 u64 changed = BSS_CHANGED_QOS; 3976 3977 /* not really used in MLO */ 3978 sdata->u.mgd.beacon_timeout = 3979 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3980 bss_conf->beacon_int)); 3981 3982 changed |= ieee80211_handle_bss_capability(link, 3983 bss_conf->assoc_capability, 3984 bss->has_erp_value, 3985 bss->erp_value); 3986 3987 ieee80211_check_rate_mask(link); 3988 3989 link->conf->bss = cbss; 3990 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3991 3992 if (sdata->vif.p2p || 3993 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3994 const struct cfg80211_bss_ies *ies; 3995 3996 rcu_read_lock(); 3997 ies = rcu_dereference(cbss->ies); 3998 if (ies) { 3999 int ret; 4000 4001 ret = cfg80211_get_p2p_attr( 4002 ies->data, ies->len, 4003 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 4004 (u8 *) &bss_conf->p2p_noa_attr, 4005 sizeof(bss_conf->p2p_noa_attr)); 4006 if (ret >= 2) { 4007 link->u.mgd.p2p_noa_index = 4008 bss_conf->p2p_noa_attr.index; 4009 changed |= BSS_CHANGED_P2P_PS; 4010 } 4011 } 4012 rcu_read_unlock(); 4013 } 4014 4015 if (link->u.mgd.have_beacon) { 4016 bss_conf->beacon_rate = bss->beacon_rate; 4017 changed |= BSS_CHANGED_BEACON_INFO; 4018 } else { 4019 bss_conf->beacon_rate = NULL; 4020 } 4021 4022 /* Tell the driver to monitor connection quality (if supported) */ 4023 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 4024 bss_conf->cqm_rssi_thold) 4025 changed |= BSS_CHANGED_CQM; 4026 4027 return changed; 4028 } 4029 4030 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 4031 struct ieee80211_mgd_assoc_data *assoc_data, 4032 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 4033 { 4034 struct ieee80211_local *local = sdata->local; 4035 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 4036 u64 vif_changed = BSS_CHANGED_ASSOC; 4037 unsigned int link_id; 4038 4039 lockdep_assert_wiphy(local->hw.wiphy); 4040 4041 sdata->u.mgd.associated = true; 4042 4043 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4044 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4045 struct ieee80211_link_data *link; 4046 4047 if (!cbss || 4048 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4049 continue; 4050 4051 if (ieee80211_vif_is_mld(&sdata->vif) && 4052 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 4053 continue; 4054 4055 link = sdata_dereference(sdata->link[link_id], sdata); 4056 if (WARN_ON(!link)) 4057 return; 4058 4059 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 4060 } 4061 4062 /* just to be sure */ 4063 ieee80211_stop_poll(sdata); 4064 4065 ieee80211_led_assoc(local, 1); 4066 4067 vif_cfg->assoc = 1; 4068 4069 /* Enable ARP filtering */ 4070 if (vif_cfg->arp_addr_cnt) 4071 vif_changed |= BSS_CHANGED_ARP_FILTER; 4072 4073 if (ieee80211_vif_is_mld(&sdata->vif)) { 4074 for (link_id = 0; 4075 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4076 link_id++) { 4077 struct ieee80211_link_data *link; 4078 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4079 4080 if (!cbss || 4081 !(BIT(link_id) & 4082 ieee80211_vif_usable_links(&sdata->vif)) || 4083 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4084 continue; 4085 4086 link = sdata_dereference(sdata->link[link_id], sdata); 4087 if (WARN_ON(!link)) 4088 return; 4089 4090 ieee80211_link_info_change_notify(sdata, link, 4091 changed[link_id]); 4092 4093 ieee80211_recalc_smps(sdata, link); 4094 } 4095 4096 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 4097 } else { 4098 ieee80211_bss_info_change_notify(sdata, 4099 vif_changed | changed[0]); 4100 } 4101 4102 ieee80211_recalc_ps(local); 4103 4104 /* leave this here to not change ordering in non-MLO cases */ 4105 if (!ieee80211_vif_is_mld(&sdata->vif)) 4106 ieee80211_recalc_smps(sdata, &sdata->deflink); 4107 ieee80211_recalc_ps_vif(sdata); 4108 4109 netif_carrier_on(sdata->dev); 4110 } 4111 4112 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 4113 { 4114 struct ieee80211_mgd_assoc_data *add_links_data = 4115 sdata->u.mgd.reconf.add_links_data; 4116 4117 if (!ieee80211_vif_is_mld(&sdata->vif) || 4118 !(sdata->u.mgd.reconf.added_links | 4119 sdata->u.mgd.reconf.removed_links)) 4120 return; 4121 4122 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4123 &sdata->u.mgd.reconf.wk); 4124 sdata->u.mgd.reconf.added_links = 0; 4125 sdata->u.mgd.reconf.removed_links = 0; 4126 sdata->u.mgd.reconf.dialog_token = 0; 4127 4128 if (add_links_data) { 4129 struct cfg80211_mlo_reconf_done_data done_data = {}; 4130 u8 link_id; 4131 4132 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4133 link_id++) 4134 done_data.links[link_id].bss = 4135 add_links_data->link[link_id].bss; 4136 4137 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4138 4139 kfree(sdata->u.mgd.reconf.add_links_data); 4140 sdata->u.mgd.reconf.add_links_data = NULL; 4141 } 4142 } 4143 4144 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4145 u16 stype, u16 reason, bool tx, 4146 u8 *frame_buf) 4147 { 4148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4149 struct ieee80211_local *local = sdata->local; 4150 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4151 unsigned int link_id; 4152 u64 changed = 0; 4153 struct ieee80211_prep_tx_info info = { 4154 .subtype = stype, 4155 .was_assoc = true, 4156 .link_id = ffs(sdata->vif.active_links) - 1, 4157 }; 4158 4159 lockdep_assert_wiphy(local->hw.wiphy); 4160 4161 if (frame_buf) 4162 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4163 4164 if (WARN_ON(!ap_sta)) 4165 return; 4166 4167 if (WARN_ON_ONCE(tx && !frame_buf)) 4168 return; 4169 4170 if (WARN_ON(!ifmgd->associated)) 4171 return; 4172 4173 ieee80211_stop_poll(sdata); 4174 4175 ifmgd->associated = false; 4176 4177 if (tx) { 4178 bool tx_link_found = false; 4179 4180 for (link_id = 0; 4181 link_id < ARRAY_SIZE(sdata->link); 4182 link_id++) { 4183 struct ieee80211_link_data *link; 4184 4185 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4186 continue; 4187 4188 link = sdata_dereference(sdata->link[link_id], sdata); 4189 if (WARN_ON_ONCE(!link)) 4190 continue; 4191 4192 if (link->u.mgd.csa.blocked_tx) 4193 continue; 4194 4195 tx_link_found = true; 4196 break; 4197 } 4198 4199 tx = tx_link_found; 4200 } 4201 4202 /* other links will be destroyed */ 4203 sdata->deflink.conf->bss = NULL; 4204 sdata->deflink.conf->epcs_support = false; 4205 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4206 4207 netif_carrier_off(sdata->dev); 4208 4209 /* 4210 * if we want to get out of ps before disassoc (why?) we have 4211 * to do it before sending disassoc, as otherwise the null-packet 4212 * won't be valid. 4213 */ 4214 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4215 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4216 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4217 } 4218 local->ps_sdata = NULL; 4219 4220 /* disable per-vif ps */ 4221 ieee80211_recalc_ps_vif(sdata); 4222 4223 /* make sure ongoing transmission finishes */ 4224 synchronize_net(); 4225 4226 /* 4227 * drop any frame before deauth/disassoc, this can be data or 4228 * management frame. Since we are disconnecting, we should not 4229 * insist sending these frames which can take time and delay 4230 * the disconnection and possible the roaming. 4231 */ 4232 ieee80211_flush_queues(local, sdata, true); 4233 4234 if (tx) { 4235 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4236 4237 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4238 sdata->vif.cfg.ap_addr, stype, 4239 reason, true, frame_buf); 4240 4241 /* flush out frame - make sure the deauth was actually sent */ 4242 ieee80211_flush_queues(local, sdata, false); 4243 4244 drv_mgd_complete_tx(sdata->local, sdata, &info); 4245 } else if (frame_buf) { 4246 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4247 sdata->vif.cfg.ap_addr, stype, 4248 reason, false, frame_buf); 4249 } 4250 4251 /* clear AP addr only after building the needed mgmt frames */ 4252 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4253 eth_zero_addr(sdata->vif.cfg.ap_addr); 4254 4255 sdata->vif.cfg.ssid_len = 0; 4256 4257 /* Remove TDLS peers */ 4258 __sta_info_flush(sdata, false, -1, ap_sta); 4259 4260 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4261 /* Only move the AP state */ 4262 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4263 } else { 4264 /* Remove AP peer */ 4265 sta_info_flush(sdata, -1); 4266 } 4267 4268 /* finally reset all BSS / config parameters */ 4269 if (!ieee80211_vif_is_mld(&sdata->vif)) 4270 changed |= ieee80211_reset_erp_info(sdata); 4271 4272 ieee80211_led_assoc(local, 0); 4273 changed |= BSS_CHANGED_ASSOC; 4274 sdata->vif.cfg.assoc = false; 4275 4276 sdata->deflink.u.mgd.p2p_noa_index = -1; 4277 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4278 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4279 4280 /* on the next assoc, re-program HT/VHT parameters */ 4281 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4282 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4283 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4284 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4285 4286 /* 4287 * reset MU-MIMO ownership and group data in default link, 4288 * if used, other links are destroyed 4289 */ 4290 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4291 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4292 memset(sdata->vif.bss_conf.mu_group.position, 0, 4293 sizeof(sdata->vif.bss_conf.mu_group.position)); 4294 if (!ieee80211_vif_is_mld(&sdata->vif)) 4295 changed |= BSS_CHANGED_MU_GROUPS; 4296 sdata->vif.bss_conf.mu_mimo_owner = false; 4297 4298 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4299 4300 timer_delete_sync(&local->dynamic_ps_timer); 4301 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4302 4303 /* Disable ARP filtering */ 4304 if (sdata->vif.cfg.arp_addr_cnt) 4305 changed |= BSS_CHANGED_ARP_FILTER; 4306 4307 sdata->vif.bss_conf.qos = false; 4308 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4309 changed |= BSS_CHANGED_QOS; 4310 /* The BSSID (not really interesting) and HT changed */ 4311 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4312 ieee80211_bss_info_change_notify(sdata, changed); 4313 } else { 4314 ieee80211_vif_cfg_change_notify(sdata, changed); 4315 } 4316 4317 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4318 /* 4319 * After notifying the driver about the disassoc, 4320 * remove the ap sta. 4321 */ 4322 sta_info_flush(sdata, -1); 4323 } 4324 4325 /* disassociated - set to defaults now */ 4326 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4327 4328 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4329 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4330 timer_delete_sync(&sdata->u.mgd.timer); 4331 4332 sdata->vif.bss_conf.dtim_period = 0; 4333 sdata->vif.bss_conf.beacon_rate = NULL; 4334 4335 sdata->deflink.u.mgd.have_beacon = false; 4336 sdata->deflink.u.mgd.tracking_signal_avg = false; 4337 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4338 4339 ifmgd->flags = 0; 4340 4341 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4342 struct ieee80211_link_data *link; 4343 4344 link = sdata_dereference(sdata->link[link_id], sdata); 4345 if (!link) 4346 continue; 4347 ieee80211_link_release_channel(link); 4348 } 4349 4350 sdata->vif.bss_conf.csa_active = false; 4351 sdata->deflink.u.mgd.csa.blocked_tx = false; 4352 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4353 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4354 ieee80211_vif_unblock_queues_csa(sdata); 4355 4356 /* existing TX TSPEC sessions no longer exist */ 4357 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4358 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4359 4360 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4361 sdata->vif.bss_conf.pwr_reduction = 0; 4362 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4363 4364 sdata->vif.cfg.eml_cap = 0; 4365 sdata->vif.cfg.eml_med_sync_delay = 0; 4366 sdata->vif.cfg.mld_capa_op = 0; 4367 4368 memset(&sdata->u.mgd.ttlm_info, 0, 4369 sizeof(sdata->u.mgd.ttlm_info)); 4370 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4371 4372 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4373 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4374 &ifmgd->neg_ttlm_timeout_work); 4375 4376 sdata->u.mgd.removed_links = 0; 4377 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 4378 &sdata->u.mgd.ml_reconf_work); 4379 4380 wiphy_work_cancel(sdata->local->hw.wiphy, 4381 &ifmgd->teardown_ttlm_work); 4382 4383 /* if disconnection happens in the middle of the ML reconfiguration 4384 * flow, cfg80211 must called to release the BSS references obtained 4385 * when the flow started. 4386 */ 4387 ieee80211_ml_reconf_reset(sdata); 4388 4389 ieee80211_vif_set_links(sdata, 0, 0); 4390 4391 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4392 4393 ifmgd->epcs.enabled = false; 4394 ifmgd->epcs.dialog_token = 0; 4395 4396 memset(ifmgd->userspace_selectors, 0, 4397 sizeof(ifmgd->userspace_selectors)); 4398 } 4399 4400 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4401 { 4402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4403 struct ieee80211_local *local = sdata->local; 4404 4405 lockdep_assert_wiphy(local->hw.wiphy); 4406 4407 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4408 return; 4409 4410 __ieee80211_stop_poll(sdata); 4411 4412 ieee80211_recalc_ps(local); 4413 4414 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4415 return; 4416 4417 /* 4418 * We've received a probe response, but are not sure whether 4419 * we have or will be receiving any beacons or data, so let's 4420 * schedule the timers again, just in case. 4421 */ 4422 ieee80211_sta_reset_beacon_monitor(sdata); 4423 4424 mod_timer(&ifmgd->conn_mon_timer, 4425 round_jiffies_up(jiffies + 4426 IEEE80211_CONNECTION_IDLE_TIME)); 4427 } 4428 4429 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4430 struct ieee80211_hdr *hdr, 4431 u16 tx_time) 4432 { 4433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4434 u16 tid; 4435 int ac; 4436 struct ieee80211_sta_tx_tspec *tx_tspec; 4437 unsigned long now = jiffies; 4438 4439 if (!ieee80211_is_data_qos(hdr->frame_control)) 4440 return; 4441 4442 tid = ieee80211_get_tid(hdr); 4443 ac = ieee80211_ac_from_tid(tid); 4444 tx_tspec = &ifmgd->tx_tspec[ac]; 4445 4446 if (likely(!tx_tspec->admitted_time)) 4447 return; 4448 4449 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4450 tx_tspec->consumed_tx_time = 0; 4451 tx_tspec->time_slice_start = now; 4452 4453 if (tx_tspec->downgraded) { 4454 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4455 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4456 &ifmgd->tx_tspec_wk, 0); 4457 } 4458 } 4459 4460 if (tx_tspec->downgraded) 4461 return; 4462 4463 tx_tspec->consumed_tx_time += tx_time; 4464 4465 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4466 tx_tspec->downgraded = true; 4467 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4468 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4469 &ifmgd->tx_tspec_wk, 0); 4470 } 4471 } 4472 4473 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4474 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4475 { 4476 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4477 4478 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4479 !sdata->u.mgd.probe_send_count) 4480 return; 4481 4482 if (ack) 4483 sdata->u.mgd.probe_send_count = 0; 4484 else 4485 sdata->u.mgd.nullfunc_failed = true; 4486 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4487 } 4488 4489 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4490 const u8 *src, const u8 *dst, 4491 const u8 *ssid, size_t ssid_len, 4492 struct ieee80211_channel *channel) 4493 { 4494 struct sk_buff *skb; 4495 4496 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4497 ssid, ssid_len, NULL, 0, 4498 IEEE80211_PROBE_FLAG_DIRECTED); 4499 if (skb) 4500 ieee80211_tx_skb(sdata, skb); 4501 } 4502 4503 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4504 { 4505 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4506 u8 *dst = sdata->vif.cfg.ap_addr; 4507 u8 unicast_limit = max(1, max_probe_tries - 3); 4508 struct sta_info *sta; 4509 4510 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4511 4512 /* 4513 * Try sending broadcast probe requests for the last three 4514 * probe requests after the first ones failed since some 4515 * buggy APs only support broadcast probe requests. 4516 */ 4517 if (ifmgd->probe_send_count >= unicast_limit) 4518 dst = NULL; 4519 4520 /* 4521 * When the hardware reports an accurate Tx ACK status, it's 4522 * better to send a nullfunc frame instead of a probe request, 4523 * as it will kick us off the AP quickly if we aren't associated 4524 * anymore. The timeout will be reset if the frame is ACKed by 4525 * the AP. 4526 */ 4527 ifmgd->probe_send_count++; 4528 4529 if (dst) { 4530 sta = sta_info_get(sdata, dst); 4531 if (!WARN_ON(!sta)) 4532 ieee80211_check_fast_rx(sta); 4533 } 4534 4535 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4536 ifmgd->nullfunc_failed = false; 4537 ieee80211_send_nullfunc(sdata->local, sdata, false); 4538 } else { 4539 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4540 sdata->vif.cfg.ssid, 4541 sdata->vif.cfg.ssid_len, 4542 sdata->deflink.conf->bss->channel); 4543 } 4544 4545 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4546 run_again(sdata, ifmgd->probe_timeout); 4547 } 4548 4549 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4550 bool beacon) 4551 { 4552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4553 bool already = false; 4554 4555 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4556 4557 if (!ieee80211_sdata_running(sdata)) 4558 return; 4559 4560 if (!ifmgd->associated) 4561 return; 4562 4563 if (sdata->local->tmp_channel || sdata->local->scanning) 4564 return; 4565 4566 if (sdata->local->suspending) { 4567 /* reschedule after resume */ 4568 ieee80211_reset_ap_probe(sdata); 4569 return; 4570 } 4571 4572 if (beacon) { 4573 mlme_dbg_ratelimited(sdata, 4574 "detected beacon loss from AP (missed %d beacons) - probing\n", 4575 beacon_loss_count); 4576 4577 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4578 } 4579 4580 /* 4581 * The driver/our work has already reported this event or the 4582 * connection monitoring has kicked in and we have already sent 4583 * a probe request. Or maybe the AP died and the driver keeps 4584 * reporting until we disassociate... 4585 * 4586 * In either case we have to ignore the current call to this 4587 * function (except for setting the correct probe reason bit) 4588 * because otherwise we would reset the timer every time and 4589 * never check whether we received a probe response! 4590 */ 4591 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4592 already = true; 4593 4594 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4595 4596 if (already) 4597 return; 4598 4599 ieee80211_recalc_ps(sdata->local); 4600 4601 ifmgd->probe_send_count = 0; 4602 ieee80211_mgd_probe_ap_send(sdata); 4603 } 4604 4605 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4606 struct ieee80211_vif *vif) 4607 { 4608 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4609 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4610 struct cfg80211_bss *cbss; 4611 struct sk_buff *skb; 4612 const struct element *ssid; 4613 int ssid_len; 4614 4615 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4616 4617 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4618 ieee80211_vif_is_mld(&sdata->vif))) 4619 return NULL; 4620 4621 if (ifmgd->associated) 4622 cbss = sdata->deflink.conf->bss; 4623 else if (ifmgd->auth_data) 4624 cbss = ifmgd->auth_data->bss; 4625 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4626 cbss = ifmgd->assoc_data->link[0].bss; 4627 else 4628 return NULL; 4629 4630 rcu_read_lock(); 4631 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4632 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4633 "invalid SSID element (len=%d)", 4634 ssid ? ssid->datalen : -1)) 4635 ssid_len = 0; 4636 else 4637 ssid_len = ssid->datalen; 4638 4639 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4640 (u32) -1, cbss->channel, 4641 ssid->data, ssid_len, 4642 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4643 rcu_read_unlock(); 4644 4645 return skb; 4646 } 4647 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4648 4649 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4650 const u8 *buf, size_t len, bool tx, 4651 u16 reason, bool reconnect) 4652 { 4653 struct ieee80211_event event = { 4654 .type = MLME_EVENT, 4655 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4656 .u.mlme.reason = reason, 4657 }; 4658 4659 if (tx) 4660 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4661 else 4662 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4663 4664 drv_event_callback(sdata->local, sdata, &event); 4665 } 4666 4667 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4668 { 4669 struct ieee80211_local *local = sdata->local; 4670 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4671 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4672 4673 lockdep_assert_wiphy(local->hw.wiphy); 4674 4675 if (!ifmgd->associated) 4676 return; 4677 4678 if (!ifmgd->driver_disconnect) { 4679 unsigned int link_id; 4680 4681 /* 4682 * AP is probably out of range (or not reachable for another 4683 * reason) so remove the bss structs for that AP. In the case 4684 * of multi-link, it's not clear that all of them really are 4685 * out of range, but if they weren't the driver likely would 4686 * have switched to just have a single link active? 4687 */ 4688 for (link_id = 0; 4689 link_id < ARRAY_SIZE(sdata->link); 4690 link_id++) { 4691 struct ieee80211_link_data *link; 4692 4693 link = sdata_dereference(sdata->link[link_id], sdata); 4694 if (!link || !link->conf->bss) 4695 continue; 4696 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4697 link->conf->bss = NULL; 4698 } 4699 } 4700 4701 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4702 ifmgd->driver_disconnect ? 4703 WLAN_REASON_DEAUTH_LEAVING : 4704 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4705 true, frame_buf); 4706 /* the other links will be destroyed */ 4707 sdata->vif.bss_conf.csa_active = false; 4708 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4709 sdata->deflink.u.mgd.csa.blocked_tx = false; 4710 ieee80211_vif_unblock_queues_csa(sdata); 4711 4712 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4713 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4714 ifmgd->reconnect); 4715 ifmgd->reconnect = false; 4716 } 4717 4718 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4719 struct wiphy_work *work) 4720 { 4721 struct ieee80211_sub_if_data *sdata = 4722 container_of(work, struct ieee80211_sub_if_data, 4723 u.mgd.beacon_connection_loss_work); 4724 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4725 4726 if (ifmgd->connection_loss) { 4727 sdata_info(sdata, "Connection to AP %pM lost\n", 4728 sdata->vif.cfg.ap_addr); 4729 __ieee80211_disconnect(sdata); 4730 ifmgd->connection_loss = false; 4731 } else if (ifmgd->driver_disconnect) { 4732 sdata_info(sdata, 4733 "Driver requested disconnection from AP %pM\n", 4734 sdata->vif.cfg.ap_addr); 4735 __ieee80211_disconnect(sdata); 4736 ifmgd->driver_disconnect = false; 4737 } else { 4738 if (ifmgd->associated) 4739 sdata->deflink.u.mgd.beacon_loss_count++; 4740 ieee80211_mgd_probe_ap(sdata, true); 4741 } 4742 } 4743 4744 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4745 struct wiphy_work *work) 4746 { 4747 struct ieee80211_sub_if_data *sdata = 4748 container_of(work, struct ieee80211_sub_if_data, 4749 u.mgd.csa_connection_drop_work); 4750 4751 __ieee80211_disconnect(sdata); 4752 } 4753 4754 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4755 { 4756 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4757 struct ieee80211_hw *hw = &sdata->local->hw; 4758 4759 trace_api_beacon_loss(sdata); 4760 4761 sdata->u.mgd.connection_loss = false; 4762 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4763 } 4764 EXPORT_SYMBOL(ieee80211_beacon_loss); 4765 4766 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4767 { 4768 struct ieee80211_sub_if_data *sdata; 4769 struct ieee80211_hw *hw; 4770 4771 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4772 4773 sdata = vif_to_sdata(vif); 4774 hw = &sdata->local->hw; 4775 4776 trace_api_connection_loss(sdata); 4777 4778 sdata->u.mgd.connection_loss = true; 4779 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4780 } 4781 EXPORT_SYMBOL(ieee80211_connection_loss); 4782 4783 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4784 { 4785 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4786 struct ieee80211_hw *hw = &sdata->local->hw; 4787 4788 trace_api_disconnect(sdata, reconnect); 4789 4790 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4791 return; 4792 4793 sdata->u.mgd.driver_disconnect = true; 4794 sdata->u.mgd.reconnect = reconnect; 4795 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4796 } 4797 EXPORT_SYMBOL(ieee80211_disconnect); 4798 4799 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4800 bool assoc) 4801 { 4802 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4803 4804 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4805 4806 sdata->u.mgd.auth_data = NULL; 4807 4808 if (!assoc) { 4809 /* 4810 * we are not authenticated yet, the only timer that could be 4811 * running is the timeout for the authentication response which 4812 * which is not relevant anymore. 4813 */ 4814 timer_delete_sync(&sdata->u.mgd.timer); 4815 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4816 4817 /* other links are destroyed */ 4818 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4819 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4820 BSS_CHANGED_BSSID); 4821 sdata->u.mgd.flags = 0; 4822 4823 ieee80211_link_release_channel(&sdata->deflink); 4824 ieee80211_vif_set_links(sdata, 0, 0); 4825 } 4826 4827 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4828 kfree(auth_data); 4829 } 4830 4831 enum assoc_status { 4832 ASSOC_SUCCESS, 4833 ASSOC_REJECTED, 4834 ASSOC_TIMEOUT, 4835 ASSOC_ABANDON, 4836 }; 4837 4838 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4839 enum assoc_status status) 4840 { 4841 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4842 4843 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4844 4845 sdata->u.mgd.assoc_data = NULL; 4846 4847 if (status != ASSOC_SUCCESS) { 4848 /* 4849 * we are not associated yet, the only timer that could be 4850 * running is the timeout for the association response which 4851 * which is not relevant anymore. 4852 */ 4853 timer_delete_sync(&sdata->u.mgd.timer); 4854 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4855 4856 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4857 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4858 BSS_CHANGED_BSSID); 4859 sdata->u.mgd.flags = 0; 4860 sdata->vif.bss_conf.mu_mimo_owner = false; 4861 4862 if (status != ASSOC_REJECTED) { 4863 struct cfg80211_assoc_failure data = { 4864 .timeout = status == ASSOC_TIMEOUT, 4865 }; 4866 int i; 4867 4868 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4869 ARRAY_SIZE(assoc_data->link)); 4870 4871 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4872 data.bss[i] = assoc_data->link[i].bss; 4873 4874 if (ieee80211_vif_is_mld(&sdata->vif)) 4875 data.ap_mld_addr = assoc_data->ap_addr; 4876 4877 cfg80211_assoc_failure(sdata->dev, &data); 4878 } 4879 4880 ieee80211_link_release_channel(&sdata->deflink); 4881 ieee80211_vif_set_links(sdata, 0, 0); 4882 } 4883 4884 kfree(assoc_data); 4885 } 4886 4887 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4888 struct ieee80211_mgmt *mgmt, size_t len) 4889 { 4890 struct ieee80211_local *local = sdata->local; 4891 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4892 const struct element *challenge; 4893 u8 *pos; 4894 u32 tx_flags = 0; 4895 struct ieee80211_prep_tx_info info = { 4896 .subtype = IEEE80211_STYPE_AUTH, 4897 .link_id = auth_data->link_id, 4898 }; 4899 4900 pos = mgmt->u.auth.variable; 4901 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4902 len - (pos - (u8 *)mgmt)); 4903 if (!challenge) 4904 return; 4905 auth_data->expected_transaction = 4; 4906 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4907 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4908 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4909 IEEE80211_TX_INTFL_MLME_CONN_TX; 4910 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4911 (void *)challenge, 4912 challenge->datalen + sizeof(*challenge), 4913 auth_data->ap_addr, auth_data->ap_addr, 4914 auth_data->key, auth_data->key_len, 4915 auth_data->key_idx, tx_flags); 4916 } 4917 4918 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4919 { 4920 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4921 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4922 struct sta_info *sta; 4923 4924 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4925 4926 sdata_info(sdata, "authenticated\n"); 4927 ifmgd->auth_data->done = true; 4928 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4929 ifmgd->auth_data->timeout_started = true; 4930 run_again(sdata, ifmgd->auth_data->timeout); 4931 4932 /* move station state to auth */ 4933 sta = sta_info_get(sdata, ap_addr); 4934 if (!sta) { 4935 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4936 return false; 4937 } 4938 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4939 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4940 return false; 4941 } 4942 4943 return true; 4944 } 4945 4946 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4947 struct ieee80211_mgmt *mgmt, size_t len) 4948 { 4949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4950 u16 auth_alg, auth_transaction, status_code, encap_len; 4951 struct ieee80211_event event = { 4952 .type = MLME_EVENT, 4953 .u.mlme.data = AUTH_EVENT, 4954 }; 4955 struct ieee80211_prep_tx_info info = { 4956 .subtype = IEEE80211_STYPE_AUTH, 4957 }; 4958 bool sae_need_confirm = false; 4959 bool auth_fail = false; 4960 4961 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4962 4963 if (len < 24 + 6) 4964 return; 4965 4966 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4967 return; 4968 4969 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4970 return; 4971 4972 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4973 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4974 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4975 4976 /* 4977 * IEEE 802.1X Authentication: 4978 * Header + Authentication Algorithm Number(2 byte) + Authentication 4979 * Transaction Sequence Number(2 byte) + Status Code(2 byte) + 4980 * Encapsulation Length(2 byte). 4981 */ 4982 if (auth_alg == WLAN_AUTH_IEEE8021X && len < 24 + 8) 4983 return; 4984 4985 info.link_id = ifmgd->auth_data->link_id; 4986 4987 if (auth_alg != ifmgd->auth_data->algorithm || 4988 (auth_alg != WLAN_AUTH_SAE && 4989 auth_transaction != ifmgd->auth_data->expected_transaction) || 4990 (auth_alg == WLAN_AUTH_SAE && 4991 (auth_transaction < ifmgd->auth_data->expected_transaction || 4992 auth_transaction > 2))) { 4993 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4994 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4995 auth_transaction, 4996 ifmgd->auth_data->expected_transaction); 4997 goto notify_driver; 4998 } 4999 5000 switch (auth_alg) { 5001 case WLAN_AUTH_IEEE8021X: 5002 if (status_code != WLAN_STATUS_SUCCESS && 5003 status_code != WLAN_STATUS_8021X_AUTH_SUCCESS) 5004 auth_fail = true; 5005 5006 if (!auth_fail) { 5007 /* Indicates length of encapsulated EAPOL PDU */ 5008 encap_len = get_unaligned_le16(mgmt->u.auth.variable); 5009 } 5010 break; 5011 default: 5012 if (status_code != WLAN_STATUS_SUCCESS) 5013 auth_fail = true; 5014 break; 5015 } 5016 5017 if (auth_fail) { 5018 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5019 5020 if (auth_alg == WLAN_AUTH_SAE && 5021 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 5022 (auth_transaction == 1 && 5023 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 5024 status_code == WLAN_STATUS_SAE_PK)))) { 5025 /* waiting for userspace now */ 5026 ifmgd->auth_data->waiting = true; 5027 ifmgd->auth_data->timeout = 5028 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 5029 ifmgd->auth_data->timeout_started = true; 5030 run_again(sdata, ifmgd->auth_data->timeout); 5031 if (auth_transaction == 1) 5032 sae_need_confirm = true; 5033 goto notify_driver; 5034 } 5035 5036 sdata_info(sdata, "%pM denied authentication (status %d)\n", 5037 mgmt->sa, status_code); 5038 ieee80211_destroy_auth_data(sdata, false); 5039 event.u.mlme.status = MLME_DENIED; 5040 event.u.mlme.reason = status_code; 5041 drv_event_callback(sdata->local, sdata, &event); 5042 goto notify_driver; 5043 } 5044 5045 switch (ifmgd->auth_data->algorithm) { 5046 case WLAN_AUTH_OPEN: 5047 case WLAN_AUTH_LEAP: 5048 case WLAN_AUTH_FT: 5049 case WLAN_AUTH_SAE: 5050 case WLAN_AUTH_FILS_SK: 5051 case WLAN_AUTH_FILS_SK_PFS: 5052 case WLAN_AUTH_FILS_PK: 5053 case WLAN_AUTH_EPPKE: 5054 case WLAN_AUTH_IEEE8021X: 5055 break; 5056 case WLAN_AUTH_SHARED_KEY: 5057 if (ifmgd->auth_data->expected_transaction != 4) { 5058 ieee80211_auth_challenge(sdata, mgmt, len); 5059 /* need another frame */ 5060 return; 5061 } 5062 break; 5063 default: 5064 WARN_ONCE(1, "invalid auth alg %d", 5065 ifmgd->auth_data->algorithm); 5066 goto notify_driver; 5067 } 5068 5069 event.u.mlme.status = MLME_SUCCESS; 5070 info.success = 1; 5071 drv_event_callback(sdata->local, sdata, &event); 5072 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 5073 (auth_transaction == 2 && 5074 ifmgd->auth_data->expected_transaction == 2)) { 5075 switch (ifmgd->auth_data->algorithm) { 5076 case WLAN_AUTH_IEEE8021X: 5077 /* 5078 * IEEE 802.1X authentication: 5079 * - When the full EAP handshake completes over the 5080 * Authentication process, the responder sets the 5081 * Status Code to WLAN_STATUS_8021X_AUTH_SUCCESS as 5082 * specified in "IEEE P802.11bi/D4.0, 12.16.5". 5083 * 5084 * - In the PMKSA caching case, only two Authentication 5085 * frames are exchanged if the responder (e.g., AP) 5086 * identifies a valid PMKSA, then as specified in 5087 * "IEEE P802.11bi/D4.0, 12.16.8.3", the responder 5088 * shall set the Status Code to SUCCESS in the final 5089 * Authentication frame and must not include an 5090 * encapsulated EAPOL PDU. 5091 * 5092 * Both conditions are treated as successful 5093 * authentication, so mark the state to Authenticated. 5094 */ 5095 if (status_code != WLAN_STATUS_8021X_AUTH_SUCCESS && 5096 !(status_code == WLAN_STATUS_SUCCESS && 5097 encap_len == 0)) 5098 break; 5099 fallthrough; 5100 default: 5101 if (!ieee80211_mark_sta_auth(sdata)) 5102 return; /* ignore frame -- wait for timeout */ 5103 5104 break; 5105 } 5106 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5107 auth_transaction == 1) { 5108 sae_need_confirm = true; 5109 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5110 auth_transaction == 2) { 5111 sdata_info(sdata, "SAE peer confirmed\n"); 5112 ifmgd->auth_data->peer_confirmed = true; 5113 } 5114 5115 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5116 notify_driver: 5117 if (!sae_need_confirm) 5118 drv_mgd_complete_tx(sdata->local, sdata, &info); 5119 } 5120 5121 #define case_WLAN(type) \ 5122 case WLAN_REASON_##type: return #type 5123 5124 const char *ieee80211_get_reason_code_string(u16 reason_code) 5125 { 5126 switch (reason_code) { 5127 case_WLAN(UNSPECIFIED); 5128 case_WLAN(PREV_AUTH_NOT_VALID); 5129 case_WLAN(DEAUTH_LEAVING); 5130 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 5131 case_WLAN(DISASSOC_AP_BUSY); 5132 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 5133 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 5134 case_WLAN(DISASSOC_STA_HAS_LEFT); 5135 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 5136 case_WLAN(DISASSOC_BAD_POWER); 5137 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 5138 case_WLAN(INVALID_IE); 5139 case_WLAN(MIC_FAILURE); 5140 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 5141 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 5142 case_WLAN(IE_DIFFERENT); 5143 case_WLAN(INVALID_GROUP_CIPHER); 5144 case_WLAN(INVALID_PAIRWISE_CIPHER); 5145 case_WLAN(INVALID_AKMP); 5146 case_WLAN(UNSUPP_RSN_VERSION); 5147 case_WLAN(INVALID_RSN_IE_CAP); 5148 case_WLAN(IEEE8021X_FAILED); 5149 case_WLAN(CIPHER_SUITE_REJECTED); 5150 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 5151 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 5152 case_WLAN(DISASSOC_LOW_ACK); 5153 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 5154 case_WLAN(QSTA_LEAVE_QBSS); 5155 case_WLAN(QSTA_NOT_USE); 5156 case_WLAN(QSTA_REQUIRE_SETUP); 5157 case_WLAN(QSTA_TIMEOUT); 5158 case_WLAN(QSTA_CIPHER_NOT_SUPP); 5159 case_WLAN(MESH_PEER_CANCELED); 5160 case_WLAN(MESH_MAX_PEERS); 5161 case_WLAN(MESH_CONFIG); 5162 case_WLAN(MESH_CLOSE); 5163 case_WLAN(MESH_MAX_RETRIES); 5164 case_WLAN(MESH_CONFIRM_TIMEOUT); 5165 case_WLAN(MESH_INVALID_GTK); 5166 case_WLAN(MESH_INCONSISTENT_PARAM); 5167 case_WLAN(MESH_INVALID_SECURITY); 5168 case_WLAN(MESH_PATH_ERROR); 5169 case_WLAN(MESH_PATH_NOFORWARD); 5170 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 5171 case_WLAN(MAC_EXISTS_IN_MBSS); 5172 case_WLAN(MESH_CHAN_REGULATORY); 5173 case_WLAN(MESH_CHAN); 5174 default: return "<unknown>"; 5175 } 5176 } 5177 5178 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5179 struct ieee80211_mgmt *mgmt, size_t len) 5180 { 5181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5182 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5183 5184 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5185 5186 if (len < 24 + 2) 5187 return; 5188 5189 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5190 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5191 return; 5192 } 5193 5194 if (ifmgd->associated && 5195 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5196 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5197 sdata->vif.cfg.ap_addr, reason_code, 5198 ieee80211_get_reason_code_string(reason_code)); 5199 5200 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5201 5202 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5203 reason_code, false); 5204 return; 5205 } 5206 5207 if (ifmgd->assoc_data && 5208 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5209 sdata_info(sdata, 5210 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5211 ifmgd->assoc_data->ap_addr, reason_code, 5212 ieee80211_get_reason_code_string(reason_code)); 5213 5214 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5215 5216 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5217 return; 5218 } 5219 } 5220 5221 5222 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5223 struct ieee80211_mgmt *mgmt, size_t len) 5224 { 5225 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5226 u16 reason_code; 5227 5228 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5229 5230 if (len < 24 + 2) 5231 return; 5232 5233 if (!ifmgd->associated || 5234 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5235 return; 5236 5237 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5238 5239 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5240 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5241 return; 5242 } 5243 5244 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5245 sdata->vif.cfg.ap_addr, reason_code, 5246 ieee80211_get_reason_code_string(reason_code)); 5247 5248 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5249 5250 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5251 false); 5252 } 5253 5254 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5255 struct ieee80211_supported_band *sband, 5256 const struct link_sta_info *link_sta, 5257 const struct ieee802_11_elems *elems) 5258 { 5259 const struct ieee80211_sta_he_cap *own_he_cap = 5260 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5261 5262 if (elems->ext_capab_len < 10) 5263 return false; 5264 5265 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5266 return false; 5267 5268 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5269 IEEE80211_HE_MAC_CAP0_TWT_RES && 5270 own_he_cap && 5271 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5272 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5273 } 5274 5275 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5276 struct ieee80211_supported_band *sband, 5277 struct ieee80211_link_data *link, 5278 struct link_sta_info *link_sta, 5279 struct ieee802_11_elems *elems) 5280 { 5281 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5282 5283 if (link->conf->twt_requester != twt) { 5284 link->conf->twt_requester = twt; 5285 return BSS_CHANGED_TWT; 5286 } 5287 return 0; 5288 } 5289 5290 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5291 struct ieee80211_bss_conf *bss_conf, 5292 struct ieee80211_supported_band *sband, 5293 struct link_sta_info *link_sta) 5294 { 5295 const struct ieee80211_sta_he_cap *own_he_cap = 5296 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5297 5298 return bss_conf->he_support && 5299 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5300 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5301 own_he_cap && 5302 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5303 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5304 } 5305 5306 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5307 bool enabled) 5308 { 5309 /* in any case this is called, dialog token should be reset */ 5310 sdata->u.mgd.epcs.dialog_token = 0; 5311 5312 if (sdata->u.mgd.epcs.enabled == enabled) 5313 return; 5314 5315 sdata->u.mgd.epcs.enabled = enabled; 5316 cfg80211_epcs_changed(sdata->dev, enabled); 5317 } 5318 5319 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5320 { 5321 struct ieee80211_local *local = sdata->local; 5322 u8 link_id; 5323 5324 if (!sdata->u.mgd.epcs.enabled) 5325 return; 5326 5327 lockdep_assert_wiphy(local->hw.wiphy); 5328 5329 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5330 struct ieee802_11_elems *elems; 5331 struct ieee80211_link_data *link; 5332 const struct cfg80211_bss_ies *ies; 5333 bool ret; 5334 5335 rcu_read_lock(); 5336 5337 link = sdata_dereference(sdata->link[link_id], sdata); 5338 if (!link || !link->conf || !link->conf->bss) { 5339 rcu_read_unlock(); 5340 continue; 5341 } 5342 5343 if (link->u.mgd.disable_wmm_tracking) { 5344 rcu_read_unlock(); 5345 ieee80211_set_wmm_default(link, false, false); 5346 continue; 5347 } 5348 5349 ies = rcu_dereference(link->conf->bss->beacon_ies); 5350 if (!ies) { 5351 rcu_read_unlock(); 5352 ieee80211_set_wmm_default(link, false, false); 5353 continue; 5354 } 5355 5356 elems = ieee802_11_parse_elems(ies->data, ies->len, 5357 IEEE80211_FTYPE_MGMT | 5358 IEEE80211_STYPE_BEACON, 5359 NULL); 5360 if (!elems) { 5361 rcu_read_unlock(); 5362 ieee80211_set_wmm_default(link, false, false); 5363 continue; 5364 } 5365 5366 ret = _ieee80211_sta_wmm_params(local, link, 5367 elems->wmm_param, 5368 elems->wmm_param_len, 5369 elems->mu_edca_param_set); 5370 5371 kfree(elems); 5372 rcu_read_unlock(); 5373 5374 if (!ret) { 5375 ieee80211_set_wmm_default(link, false, false); 5376 continue; 5377 } 5378 5379 ieee80211_mgd_set_link_qos_params(link); 5380 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5381 } 5382 } 5383 5384 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5385 struct link_sta_info *link_sta, 5386 struct cfg80211_bss *cbss, 5387 struct ieee80211_mgmt *mgmt, 5388 const u8 *elem_start, 5389 unsigned int elem_len, 5390 u64 *changed) 5391 { 5392 struct ieee80211_sub_if_data *sdata = link->sdata; 5393 struct ieee80211_mgd_assoc_data *assoc_data = 5394 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5395 struct ieee80211_bss_conf *bss_conf = link->conf; 5396 struct ieee80211_local *local = sdata->local; 5397 unsigned int link_id = link->link_id; 5398 struct ieee80211_elems_parse_params parse_params = { 5399 .mode = link->u.mgd.conn.mode, 5400 .start = elem_start, 5401 .len = elem_len, 5402 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5403 .from_ap = true, 5404 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5405 }; 5406 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5407 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5408 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5409 const struct cfg80211_bss_ies *bss_ies = NULL; 5410 struct ieee80211_supported_band *sband; 5411 struct ieee802_11_elems *elems; 5412 const __le16 prof_bss_param_ch_present = 5413 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5414 u16 capab_info; 5415 bool ret; 5416 5417 elems = ieee802_11_parse_elems_full(&parse_params); 5418 if (!elems) 5419 return false; 5420 5421 if (link_id == assoc_data->assoc_link_id) { 5422 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5423 5424 /* 5425 * we should not get to this flow unless the association was 5426 * successful, so set the status directly to success 5427 */ 5428 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5429 if (elems->ml_basic) { 5430 int bss_param_ch_cnt = 5431 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5432 5433 if (bss_param_ch_cnt < 0) { 5434 ret = false; 5435 goto out; 5436 } 5437 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5438 bss_conf->bss_param_ch_cnt_link_id = link_id; 5439 } 5440 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5441 !elems->prof || 5442 !(elems->prof->control & prof_bss_param_ch_present)) { 5443 ret = false; 5444 goto out; 5445 } else { 5446 const u8 *ptr = elems->prof->variable + 5447 elems->prof->sta_info_len - 1; 5448 int bss_param_ch_cnt; 5449 5450 /* 5451 * During parsing, we validated that these fields exist, 5452 * otherwise elems->prof would have been set to NULL. 5453 */ 5454 capab_info = get_unaligned_le16(ptr); 5455 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5456 bss_param_ch_cnt = 5457 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5458 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5459 bss_conf->bss_param_ch_cnt_link_id = link_id; 5460 5461 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5462 link_info(link, "association response status code=%u\n", 5463 assoc_data->link[link_id].status); 5464 ret = true; 5465 goto out; 5466 } 5467 } 5468 5469 if (!is_s1g && !elems->supp_rates) { 5470 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5471 ret = false; 5472 goto out; 5473 } 5474 5475 link->u.mgd.tdls_chan_switch_prohibited = 5476 elems->ext_capab && elems->ext_capab_len >= 5 && 5477 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5478 5479 /* 5480 * Some APs are erroneously not including some information in their 5481 * (re)association response frames. Try to recover by using the data 5482 * from the beacon or probe response. This seems to afflict mobile 5483 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5484 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5485 */ 5486 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5487 ((assoc_data->wmm && !elems->wmm_param) || 5488 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5489 (!elems->ht_cap_elem || !elems->ht_operation)) || 5490 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5491 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5492 const struct cfg80211_bss_ies *ies; 5493 struct ieee802_11_elems *bss_elems; 5494 5495 rcu_read_lock(); 5496 ies = rcu_dereference(cbss->ies); 5497 if (ies) 5498 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5499 GFP_ATOMIC); 5500 rcu_read_unlock(); 5501 if (!bss_ies) { 5502 ret = false; 5503 goto out; 5504 } 5505 5506 parse_params.start = bss_ies->data; 5507 parse_params.len = bss_ies->len; 5508 parse_params.bss = cbss; 5509 parse_params.link_id = -1; 5510 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5511 if (!bss_elems) { 5512 ret = false; 5513 goto out; 5514 } 5515 5516 if (assoc_data->wmm && 5517 !elems->wmm_param && bss_elems->wmm_param) { 5518 elems->wmm_param = bss_elems->wmm_param; 5519 sdata_info(sdata, 5520 "AP bug: WMM param missing from AssocResp\n"); 5521 } 5522 5523 /* 5524 * Also check if we requested HT/VHT, otherwise the AP doesn't 5525 * have to include the IEs in the (re)association response. 5526 */ 5527 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5528 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5529 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5530 sdata_info(sdata, 5531 "AP bug: HT capability missing from AssocResp\n"); 5532 } 5533 if (!elems->ht_operation && bss_elems->ht_operation && 5534 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5535 elems->ht_operation = bss_elems->ht_operation; 5536 sdata_info(sdata, 5537 "AP bug: HT operation missing from AssocResp\n"); 5538 } 5539 5540 if (is_5ghz) { 5541 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5542 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5543 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5544 sdata_info(sdata, 5545 "AP bug: VHT capa missing from AssocResp\n"); 5546 } 5547 5548 if (!elems->vht_operation && bss_elems->vht_operation && 5549 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5550 elems->vht_operation = bss_elems->vht_operation; 5551 sdata_info(sdata, 5552 "AP bug: VHT operation missing from AssocResp\n"); 5553 } 5554 } 5555 kfree(bss_elems); 5556 } 5557 5558 /* 5559 * We previously checked these in the beacon/probe response, so 5560 * they should be present here. This is just a safety net. 5561 * Note that the ieee80211_config_bw() below would also check 5562 * for this (and more), but this has better error reporting. 5563 */ 5564 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5565 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5566 sdata_info(sdata, 5567 "HT AP is missing WMM params or HT capability/operation\n"); 5568 ret = false; 5569 goto out; 5570 } 5571 5572 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5573 (!elems->vht_cap_elem || !elems->vht_operation)) { 5574 sdata_info(sdata, 5575 "VHT AP is missing VHT capability/operation\n"); 5576 ret = false; 5577 goto out; 5578 } 5579 5580 /* check/update if AP changed anything in assoc response vs. scan */ 5581 if (ieee80211_config_bw(link, elems, 5582 link_id == assoc_data->assoc_link_id, 5583 changed, 5584 le16_to_cpu(mgmt->frame_control) & 5585 IEEE80211_FCTL_STYPE)) { 5586 ret = false; 5587 goto out; 5588 } 5589 5590 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5591 ret = false; 5592 goto out; 5593 } 5594 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5595 5596 /* Set up internal HT/VHT capabilities */ 5597 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5598 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, &sband->ht_cap, 5599 elems->ht_cap_elem, 5600 link_sta); 5601 5602 if (elems->vht_cap_elem && 5603 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5604 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5605 const struct cfg80211_bss_ies *ies; 5606 5607 /* 5608 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5609 * too large maximum MPDU length in the association response 5610 * (indicating 12k) that it cannot actually process ... 5611 * Work around that. 5612 */ 5613 rcu_read_lock(); 5614 ies = rcu_dereference(cbss->ies); 5615 if (ies) { 5616 const struct element *elem; 5617 5618 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5619 ies->data, ies->len); 5620 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5621 bss_vht_cap = (const void *)elem->data; 5622 } 5623 5624 if (ieee80211_hw_check(&local->hw, STRICT) && 5625 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5626 sizeof(*bss_vht_cap)))) { 5627 rcu_read_unlock(); 5628 ret = false; 5629 link_info(link, "VHT capabilities mismatch\n"); 5630 goto out; 5631 } 5632 5633 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5634 &sband->vht_cap, 5635 elems->vht_cap_elem, 5636 bss_vht_cap, link_sta); 5637 rcu_read_unlock(); 5638 } 5639 5640 if (elems->he_operation && 5641 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5642 elems->he_cap) { 5643 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5644 elems->he_cap, 5645 elems->he_cap_len, 5646 elems->he_6ghz_capa, 5647 link_sta); 5648 5649 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5650 if (elems->rsnx && elems->rsnx_len && 5651 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5652 wiphy_ext_feature_isset(local->hw.wiphy, 5653 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5654 bss_conf->twt_protected = true; 5655 else 5656 bss_conf->twt_protected = false; 5657 5658 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5659 link_sta, elems); 5660 5661 if (elems->eht_operation && elems->eht_cap && 5662 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5663 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5664 elems->he_cap, 5665 elems->he_cap_len, 5666 elems->eht_cap, 5667 elems->eht_cap_len, 5668 link_sta); 5669 5670 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5671 bss_conf->epcs_support = bss_conf->eht_support && 5672 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5673 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5674 5675 /* EPCS might be already enabled but a new added link 5676 * does not support EPCS. This should not really happen 5677 * in practice. 5678 */ 5679 if (sdata->u.mgd.epcs.enabled && 5680 !bss_conf->epcs_support) 5681 ieee80211_epcs_teardown(sdata); 5682 } else { 5683 bss_conf->eht_support = false; 5684 bss_conf->epcs_support = false; 5685 } 5686 } else { 5687 bss_conf->he_support = false; 5688 bss_conf->twt_requester = false; 5689 bss_conf->twt_protected = false; 5690 bss_conf->eht_support = false; 5691 bss_conf->epcs_support = false; 5692 } 5693 5694 if (elems->uhr_operation && elems->uhr_cap && 5695 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_UHR) { 5696 ieee80211_uhr_cap_ie_to_sta_uhr_cap(sdata, sband, 5697 elems->uhr_cap, 5698 elems->uhr_cap_len, 5699 link_sta); 5700 5701 bss_conf->uhr_support = link_sta->pub->uhr_cap.has_uhr; 5702 } else { 5703 bss_conf->uhr_support = false; 5704 } 5705 5706 if (elems->s1g_oper && 5707 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5708 elems->s1g_capab) 5709 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5710 link_sta); 5711 5712 bss_conf->twt_broadcast = 5713 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5714 5715 if (bss_conf->he_support) { 5716 bss_conf->he_bss_color.color = 5717 le32_get_bits(elems->he_operation->he_oper_params, 5718 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5719 bss_conf->he_bss_color.partial = 5720 le32_get_bits(elems->he_operation->he_oper_params, 5721 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5722 bss_conf->he_bss_color.enabled = 5723 !le32_get_bits(elems->he_operation->he_oper_params, 5724 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5725 5726 if (bss_conf->he_bss_color.enabled) 5727 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5728 5729 bss_conf->htc_trig_based_pkt_ext = 5730 le32_get_bits(elems->he_operation->he_oper_params, 5731 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5732 bss_conf->frame_time_rts_th = 5733 le32_get_bits(elems->he_operation->he_oper_params, 5734 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5735 5736 bss_conf->uora_exists = !!elems->uora_element; 5737 if (elems->uora_element) 5738 bss_conf->uora_ocw_range = elems->uora_element[0]; 5739 5740 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5741 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5742 /* TODO: OPEN: what happens if BSS color disable is set? */ 5743 } 5744 5745 if (cbss->transmitted_bss) { 5746 bss_conf->nontransmitted = true; 5747 ether_addr_copy(bss_conf->transmitter_bssid, 5748 cbss->transmitted_bss->bssid); 5749 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5750 bss_conf->bssid_index = cbss->bssid_index; 5751 } 5752 5753 /* 5754 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5755 * in their association response, so ignore that data for our own 5756 * configuration. If it changed since the last beacon, we'll get the 5757 * next beacon and update then. 5758 */ 5759 5760 /* 5761 * If an operating mode notification IE is present, override the 5762 * NSS calculation (that would be done in rate_control_rate_init()) 5763 * and use the # of streams from that element. 5764 */ 5765 if (elems->opmode_notif && 5766 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5767 u8 nss; 5768 5769 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5770 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5771 nss += 1; 5772 link_sta->pub->rx_nss = nss; 5773 } 5774 5775 /* 5776 * Always handle WMM once after association regardless 5777 * of the first value the AP uses. Setting -1 here has 5778 * that effect because the AP values is an unsigned 5779 * 4-bit value. 5780 */ 5781 link->u.mgd.wmm_last_param_set = -1; 5782 link->u.mgd.mu_edca_last_param_set = -1; 5783 5784 if (link->u.mgd.disable_wmm_tracking) { 5785 ieee80211_set_wmm_default(link, false, false); 5786 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5787 elems->wmm_param_len, 5788 elems->mu_edca_param_set)) { 5789 /* still enable QoS since we might have HT/VHT */ 5790 ieee80211_set_wmm_default(link, false, true); 5791 /* disable WMM tracking in this case to disable 5792 * tracking WMM parameter changes in the beacon if 5793 * the parameters weren't actually valid. Doing so 5794 * avoids changing parameters very strangely when 5795 * the AP is going back and forth between valid and 5796 * invalid parameters. 5797 */ 5798 link->u.mgd.disable_wmm_tracking = true; 5799 } 5800 5801 if (elems->max_idle_period_ie) { 5802 bss_conf->max_idle_period = 5803 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5804 bss_conf->protected_keep_alive = 5805 !!(elems->max_idle_period_ie->idle_options & 5806 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5807 *changed |= BSS_CHANGED_KEEP_ALIVE; 5808 } else { 5809 bss_conf->max_idle_period = 0; 5810 bss_conf->protected_keep_alive = false; 5811 } 5812 5813 /* set assoc capability (AID was already set earlier), 5814 * ieee80211_set_associated() will tell the driver */ 5815 bss_conf->assoc_capability = capab_info; 5816 5817 ret = true; 5818 out: 5819 kfree(elems); 5820 kfree(bss_ies); 5821 return ret; 5822 } 5823 5824 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5825 struct sta_info *sta, 5826 struct link_sta_info *link_sta, 5827 struct cfg80211_bss *cbss) 5828 { 5829 struct ieee80211_sub_if_data *sdata = link->sdata; 5830 struct ieee80211_local *local = sdata->local; 5831 struct ieee80211_bss *bss = (void *)cbss->priv; 5832 u32 rates = 0, basic_rates = 0; 5833 bool have_higher_than_11mbit = false; 5834 int min_rate = INT_MAX, min_rate_index = -1; 5835 struct ieee80211_supported_band *sband; 5836 5837 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5838 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5839 5840 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5841 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5842 ieee80211_s1g_sta_rate_init(sta); 5843 return 0; 5844 } 5845 5846 sband = local->hw.wiphy->bands[cbss->channel->band]; 5847 5848 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5849 NULL, 0, 5850 &rates, &basic_rates, NULL, 5851 &have_higher_than_11mbit, 5852 &min_rate, &min_rate_index); 5853 5854 /* 5855 * This used to be a workaround for basic rates missing 5856 * in the association response frame. Now that we no 5857 * longer use the basic rates from there, it probably 5858 * doesn't happen any more, but keep the workaround so 5859 * in case some *other* APs are buggy in different ways 5860 * we can connect -- with a warning. 5861 * Allow this workaround only in case the AP provided at least 5862 * one rate. 5863 */ 5864 if (min_rate_index < 0) { 5865 link_info(link, "No legacy rates in association response\n"); 5866 return -EINVAL; 5867 } else if (!basic_rates) { 5868 link_info(link, "No basic rates, using min rate instead\n"); 5869 basic_rates = BIT(min_rate_index); 5870 } 5871 5872 if (rates) 5873 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5874 else 5875 link_info(link, "No rates found, keeping mandatory only\n"); 5876 5877 link->conf->basic_rates = basic_rates; 5878 5879 /* cf. IEEE 802.11 9.2.12 */ 5880 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5881 have_higher_than_11mbit; 5882 5883 return 0; 5884 } 5885 5886 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5887 struct cfg80211_bss *cbss) 5888 { 5889 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5890 const struct element *ht_cap_elem, *vht_cap_elem; 5891 const struct cfg80211_bss_ies *ies; 5892 const struct ieee80211_ht_cap *ht_cap; 5893 const struct ieee80211_vht_cap *vht_cap; 5894 const struct ieee80211_he_cap_elem *he_cap; 5895 const struct element *he_cap_elem; 5896 u16 mcs_80_map, mcs_160_map; 5897 int i, mcs_nss_size; 5898 bool support_160; 5899 u8 chains = 1; 5900 5901 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5902 return chains; 5903 5904 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5905 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5906 ht_cap = (void *)ht_cap_elem->data; 5907 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5908 /* 5909 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5910 * "Tx Unequal Modulation Supported" fields. 5911 */ 5912 } 5913 5914 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5915 return chains; 5916 5917 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5918 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5919 u8 nss; 5920 u16 tx_mcs_map; 5921 5922 vht_cap = (void *)vht_cap_elem->data; 5923 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5924 for (nss = 8; nss > 0; nss--) { 5925 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5926 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5927 break; 5928 } 5929 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5930 chains = max(chains, nss); 5931 } 5932 5933 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5934 return chains; 5935 5936 ies = rcu_dereference(cbss->ies); 5937 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5938 ies->data, ies->len); 5939 5940 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5941 return chains; 5942 5943 /* skip one byte ext_tag_id */ 5944 he_cap = (void *)(he_cap_elem->data + 1); 5945 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5946 5947 /* invalid HE IE */ 5948 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5949 return chains; 5950 5951 /* mcs_nss is right after he_cap info */ 5952 he_mcs_nss_supp = (void *)(he_cap + 1); 5953 5954 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5955 5956 for (i = 7; i >= 0; i--) { 5957 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5958 5959 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5960 chains = max_t(u8, chains, i + 1); 5961 break; 5962 } 5963 } 5964 5965 support_160 = he_cap->phy_cap_info[0] & 5966 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5967 5968 if (!support_160) 5969 return chains; 5970 5971 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5972 for (i = 7; i >= 0; i--) { 5973 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5974 5975 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5976 chains = max_t(u8, chains, i + 1); 5977 break; 5978 } 5979 } 5980 5981 return chains; 5982 } 5983 5984 static void 5985 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5986 struct ieee80211_supported_band *sband, 5987 struct cfg80211_assoc_request *req, 5988 bool wmm_used, int link_id, 5989 struct ieee80211_conn_settings *conn) 5990 { 5991 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5992 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5993 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5994 const struct ieee80211_sta_he_cap *he_cap; 5995 const struct ieee80211_sta_eht_cap *eht_cap; 5996 const struct ieee80211_sta_uhr_cap *uhr_cap; 5997 struct ieee80211_sta_vht_cap vht_cap; 5998 5999 if (sband->band == NL80211_BAND_S1GHZ) { 6000 conn->mode = IEEE80211_CONN_MODE_S1G; 6001 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6002 mlme_dbg(sdata, "operating as S1G STA\n"); 6003 return; 6004 } 6005 6006 conn->mode = IEEE80211_CONN_MODE_LEGACY; 6007 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6008 6009 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 6010 6011 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 6012 mlme_link_id_dbg(sdata, link_id, 6013 "HT disabled by flag, limiting to legacy\n"); 6014 goto out; 6015 } 6016 6017 if (!wmm_used) { 6018 mlme_link_id_dbg(sdata, link_id, 6019 "WMM/QoS not supported, limiting to legacy\n"); 6020 goto out; 6021 } 6022 6023 if (req) { 6024 unsigned int i; 6025 6026 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 6027 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 6028 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 6029 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 6030 netdev_info(sdata->dev, 6031 "WEP/TKIP use, limiting to legacy\n"); 6032 goto out; 6033 } 6034 } 6035 } 6036 6037 if (!sta_ht_cap.ht_supported && !is_6ghz) { 6038 mlme_link_id_dbg(sdata, link_id, 6039 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 6040 goto out; 6041 } 6042 6043 /* HT is fine */ 6044 conn->mode = IEEE80211_CONN_MODE_HT; 6045 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 6046 IEEE80211_CONN_BW_LIMIT_40 : 6047 IEEE80211_CONN_BW_LIMIT_20; 6048 6049 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 6050 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 6051 6052 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 6053 mlme_link_id_dbg(sdata, link_id, 6054 "VHT disabled by flag, limiting to HT\n"); 6055 goto out; 6056 } 6057 6058 if (vht_cap.vht_supported && is_5ghz) { 6059 bool have_80mhz = false; 6060 unsigned int i; 6061 6062 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 6063 mlme_link_id_dbg(sdata, link_id, 6064 "no 40 MHz support on 5 GHz, limiting to HT\n"); 6065 goto out; 6066 } 6067 6068 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 6069 for (i = 0; i < sband->n_channels; i++) { 6070 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 6071 IEEE80211_CHAN_NO_80MHZ)) 6072 continue; 6073 6074 have_80mhz = true; 6075 break; 6076 } 6077 6078 if (!have_80mhz) { 6079 mlme_link_id_dbg(sdata, link_id, 6080 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 6081 goto out; 6082 } 6083 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 6084 mlme_link_id_dbg(sdata, link_id, 6085 "no VHT support on 5 GHz, limiting to HT\n"); 6086 goto out; 6087 } 6088 6089 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 6090 if (sband->band != NL80211_BAND_2GHZ) { 6091 conn->mode = IEEE80211_CONN_MODE_VHT; 6092 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 6093 } 6094 6095 if (is_5ghz && 6096 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 6097 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ | 6098 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK))) { 6099 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 6100 mlme_link_id_dbg(sdata, link_id, 6101 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 6102 } 6103 6104 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 6105 mlme_link_id_dbg(sdata, link_id, 6106 "HE disabled by flag, limiting to HT/VHT\n"); 6107 goto out; 6108 } 6109 6110 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 6111 if (!he_cap) { 6112 WARN_ON(is_6ghz); 6113 mlme_link_id_dbg(sdata, link_id, 6114 "no HE support, limiting to HT/VHT\n"); 6115 goto out; 6116 } 6117 6118 /* so we have HE */ 6119 conn->mode = IEEE80211_CONN_MODE_HE; 6120 6121 /* check bandwidth */ 6122 switch (sband->band) { 6123 default: 6124 case NL80211_BAND_2GHZ: 6125 if (he_cap->he_cap_elem.phy_cap_info[0] & 6126 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 6127 break; 6128 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6129 mlme_link_id_dbg(sdata, link_id, 6130 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 6131 break; 6132 case NL80211_BAND_5GHZ: 6133 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6134 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 6135 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6136 mlme_link_id_dbg(sdata, link_id, 6137 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 6138 break; 6139 } 6140 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6141 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 6142 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6143 conn->bw_limit, 6144 IEEE80211_CONN_BW_LIMIT_80); 6145 mlme_link_id_dbg(sdata, link_id, 6146 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 6147 } 6148 break; 6149 case NL80211_BAND_6GHZ: 6150 if (he_cap->he_cap_elem.phy_cap_info[0] & 6151 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 6152 break; 6153 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6154 conn->bw_limit, 6155 IEEE80211_CONN_BW_LIMIT_80); 6156 mlme_link_id_dbg(sdata, link_id, 6157 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 6158 break; 6159 } 6160 6161 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 6162 mlme_link_id_dbg(sdata, link_id, 6163 "EHT disabled by flag, limiting to HE\n"); 6164 goto out; 6165 } 6166 6167 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 6168 if (!eht_cap) { 6169 mlme_link_id_dbg(sdata, link_id, 6170 "no EHT support, limiting to HE\n"); 6171 goto out; 6172 } 6173 conn->mode = IEEE80211_CONN_MODE_EHT; 6174 6175 /* check bandwidth */ 6176 if (is_6ghz && 6177 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 6178 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 6179 else if (is_6ghz) 6180 mlme_link_id_dbg(sdata, link_id, 6181 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 6182 6183 if (req && req->flags & ASSOC_REQ_DISABLE_UHR) { 6184 mlme_link_id_dbg(sdata, link_id, 6185 "UHR disabled by flag, limiting to EHT\n"); 6186 goto out; 6187 } 6188 6189 uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 6190 if (!uhr_cap) { 6191 mlme_link_id_dbg(sdata, link_id, 6192 "no UHR support, limiting to EHT\n"); 6193 goto out; 6194 } 6195 conn->mode = IEEE80211_CONN_MODE_UHR; 6196 6197 out: 6198 mlme_link_id_dbg(sdata, link_id, 6199 "determined local STA to be %s, BW limited to %d MHz\n", 6200 ieee80211_conn_mode_str(conn->mode), 6201 20 * (1 << conn->bw_limit)); 6202 } 6203 6204 static void 6205 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6206 struct ieee80211_supported_band *sband, 6207 struct cfg80211_auth_request *req, 6208 bool wmm_used, 6209 struct ieee80211_conn_settings *conn) 6210 { 6211 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6212 req->link_id > 0 ? req->link_id : 0, 6213 conn); 6214 } 6215 6216 static void 6217 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6218 struct ieee80211_supported_band *sband, 6219 struct cfg80211_assoc_request *req, 6220 bool wmm_used, int link_id, 6221 struct ieee80211_conn_settings *conn) 6222 { 6223 struct ieee80211_conn_settings tmp; 6224 6225 WARN_ON(!req); 6226 6227 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6228 &tmp); 6229 6230 conn->mode = min_t(enum ieee80211_conn_mode, 6231 conn->mode, tmp.mode); 6232 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6233 conn->bw_limit, tmp.bw_limit); 6234 } 6235 6236 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6237 struct ieee80211_link_data *link, 6238 int link_id, 6239 struct cfg80211_bss *cbss, bool mlo, 6240 struct ieee80211_conn_settings *conn, 6241 unsigned long *userspace_selectors) 6242 { 6243 struct ieee80211_local *local = sdata->local; 6244 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6245 struct ieee80211_chan_req chanreq = {}; 6246 struct cfg80211_chan_def ap_chandef; 6247 struct ieee802_11_elems *elems; 6248 int ret; 6249 6250 lockdep_assert_wiphy(local->hw.wiphy); 6251 6252 rcu_read_lock(); 6253 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6254 &chanreq, &ap_chandef, 6255 userspace_selectors); 6256 6257 if (IS_ERR(elems)) { 6258 rcu_read_unlock(); 6259 return PTR_ERR(elems); 6260 } 6261 6262 if (mlo && !elems->ml_basic) { 6263 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6264 rcu_read_unlock(); 6265 kfree(elems); 6266 return -EINVAL; 6267 } 6268 6269 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6270 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6271 6272 if (elems->pwr_constr_elem) 6273 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6274 6275 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6276 if (he_6ghz_oper) 6277 link->conf->power_type = 6278 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6279 cbss->channel->flags); 6280 else 6281 link_info(link, 6282 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6283 cbss->channel->center_freq); 6284 6285 link->conf->tpe = elems->tpe; 6286 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6287 &chanreq.oper); 6288 } 6289 rcu_read_unlock(); 6290 /* the element data was RCU protected so no longer valid anyway */ 6291 kfree(elems); 6292 elems = NULL; 6293 6294 if (!link) 6295 return 0; 6296 6297 rcu_read_lock(); 6298 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6299 local->rx_chains); 6300 rcu_read_unlock(); 6301 6302 /* 6303 * If this fails (possibly due to channel context sharing 6304 * on incompatible channels, e.g. 80+80 and 160 sharing the 6305 * same control channel) try to use a smaller bandwidth. 6306 */ 6307 ret = ieee80211_link_use_channel(link, &chanreq, 6308 IEEE80211_CHANCTX_SHARED); 6309 6310 /* don't downgrade for 5/10/S1G MHz channels, though. */ 6311 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6312 chanreq.oper.width == NL80211_CHAN_WIDTH_10 || 6313 cfg80211_chandef_is_s1g(&chanreq.oper)) 6314 return ret; 6315 6316 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6317 ieee80211_chanreq_downgrade(&chanreq, conn); 6318 6319 ret = ieee80211_link_use_channel(link, &chanreq, 6320 IEEE80211_CHANCTX_SHARED); 6321 } 6322 6323 return ret; 6324 } 6325 6326 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6327 u8 *dtim_count, u8 *dtim_period) 6328 { 6329 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6330 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6331 ies->len); 6332 const struct ieee80211_tim_ie *tim = NULL; 6333 const struct ieee80211_bssid_index *idx; 6334 bool valid = tim_ie && tim_ie[1] >= 2; 6335 6336 if (valid) 6337 tim = (void *)(tim_ie + 2); 6338 6339 if (dtim_count) 6340 *dtim_count = valid ? tim->dtim_count : 0; 6341 6342 if (dtim_period) 6343 *dtim_period = valid ? tim->dtim_period : 0; 6344 6345 /* Check if value is overridden by non-transmitted profile */ 6346 if (!idx_ie || idx_ie[1] < 3) 6347 return valid; 6348 6349 idx = (void *)(idx_ie + 2); 6350 6351 if (dtim_count) 6352 *dtim_count = idx->dtim_count; 6353 6354 if (dtim_period) 6355 *dtim_period = idx->dtim_period; 6356 6357 return true; 6358 } 6359 6360 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6361 { 6362 if (bm_size == 1) 6363 return *data; 6364 6365 return get_unaligned_le16(data); 6366 } 6367 6368 static int 6369 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6370 const struct ieee80211_ttlm_elem *ttlm, 6371 struct ieee80211_adv_ttlm_info *ttlm_info) 6372 { 6373 /* The element size was already validated in 6374 * ieee80211_tid_to_link_map_size_ok() 6375 */ 6376 u8 control, link_map_presence, map_size, tid; 6377 u8 *pos; 6378 6379 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6380 pos = (void *)ttlm->optional; 6381 control = ttlm->control; 6382 6383 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6384 IEEE80211_TTLM_DIRECTION_BOTH) { 6385 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6386 return -EINVAL; 6387 } 6388 6389 if (!(control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP)) { 6390 link_map_presence = *pos; 6391 pos++; 6392 } 6393 6394 if (control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT) { 6395 ttlm_info->switch_time = get_unaligned_le16(pos); 6396 6397 /* Since ttlm_info->switch_time == 0 means no switch time, bump 6398 * it by 1. 6399 */ 6400 if (!ttlm_info->switch_time) 6401 ttlm_info->switch_time = 1; 6402 6403 pos += 2; 6404 } 6405 6406 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6407 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6408 pos += 3; 6409 } 6410 6411 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6412 ttlm_info->map = 0xffff; 6413 return 0; 6414 } 6415 6416 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6417 map_size = 1; 6418 else 6419 map_size = 2; 6420 6421 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6422 * not advertise a TID-to-link mapping that does not map all TIDs to the 6423 * same link set, reject frame if not all links have mapping 6424 */ 6425 if (link_map_presence != 0xff) { 6426 sdata_info(sdata, 6427 "Invalid advertised T2L mapping presence indicator\n"); 6428 return -EINVAL; 6429 } 6430 6431 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6432 if (!ttlm_info->map) { 6433 sdata_info(sdata, 6434 "Invalid advertised T2L map for TID 0\n"); 6435 return -EINVAL; 6436 } 6437 6438 pos += map_size; 6439 6440 for (tid = 1; tid < 8; tid++) { 6441 u16 map = ieee80211_get_ttlm(map_size, pos); 6442 6443 if (map != ttlm_info->map) { 6444 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6445 tid); 6446 return -EINVAL; 6447 } 6448 6449 pos += map_size; 6450 } 6451 return 0; 6452 } 6453 6454 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6455 struct ieee80211_mgmt *mgmt, 6456 struct ieee802_11_elems *elems, 6457 const u8 *elem_start, unsigned int elem_len) 6458 { 6459 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6460 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6461 struct ieee80211_local *local = sdata->local; 6462 unsigned int link_id; 6463 struct sta_info *sta; 6464 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6465 u16 valid_links = 0, dormant_links = 0; 6466 int err; 6467 6468 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6469 /* 6470 * station info was already allocated and inserted before 6471 * the association and should be available to us 6472 */ 6473 sta = sta_info_get(sdata, assoc_data->ap_addr); 6474 if (WARN_ON(!sta)) 6475 goto out_err; 6476 6477 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6478 6479 if (ieee80211_vif_is_mld(&sdata->vif)) { 6480 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6481 if (!assoc_data->link[link_id].bss) 6482 continue; 6483 6484 valid_links |= BIT(link_id); 6485 6486 if (link_id != assoc_data->assoc_link_id) { 6487 err = ieee80211_sta_allocate_link(sta, link_id); 6488 if (err) 6489 goto out_err; 6490 } 6491 } 6492 6493 /* 6494 * We do not support setting a negotiated TTLM during 6495 * association. As such, we can assume that if there is a TTLM, 6496 * then it is the currently active advertised TTLM. 6497 * In that case, there must be exactly one TTLM that does not 6498 * have a switch time set. This mapping should also leave us 6499 * with at least one usable link. 6500 */ 6501 if (elems->ttlm_num > 1) { 6502 sdata_info(sdata, 6503 "More than one advertised TTLM in association response\n"); 6504 goto out_err; 6505 } else if (elems->ttlm_num == 1) { 6506 if (ieee80211_parse_adv_t2l(sdata, elems->ttlm[0], 6507 &sdata->u.mgd.ttlm_info) || 6508 sdata->u.mgd.ttlm_info.switch_time != 0 || 6509 !(valid_links & sdata->u.mgd.ttlm_info.map)) { 6510 sdata_info(sdata, 6511 "Invalid advertised TTLM in association response\n"); 6512 goto out_err; 6513 } 6514 6515 sdata->u.mgd.ttlm_info.active = true; 6516 dormant_links = 6517 valid_links & ~sdata->u.mgd.ttlm_info.map; 6518 } 6519 6520 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6521 } 6522 6523 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6524 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6525 struct ieee80211_link_data *link; 6526 struct link_sta_info *link_sta; 6527 6528 if (!cbss) 6529 continue; 6530 6531 link = sdata_dereference(sdata->link[link_id], sdata); 6532 if (WARN_ON(!link)) 6533 goto out_err; 6534 6535 if (ieee80211_vif_is_mld(&sdata->vif)) 6536 link_info(link, 6537 "local address %pM, AP link address %pM%s\n", 6538 link->conf->addr, 6539 assoc_data->link[link_id].bss->bssid, 6540 link_id == assoc_data->assoc_link_id ? 6541 " (assoc)" : ""); 6542 6543 link_sta = rcu_dereference_protected(sta->link[link_id], 6544 lockdep_is_held(&local->hw.wiphy->mtx)); 6545 if (WARN_ON(!link_sta)) 6546 goto out_err; 6547 6548 if (!link->u.mgd.have_beacon) { 6549 const struct cfg80211_bss_ies *ies; 6550 6551 rcu_read_lock(); 6552 ies = rcu_dereference(cbss->beacon_ies); 6553 if (ies) 6554 link->u.mgd.have_beacon = true; 6555 else 6556 ies = rcu_dereference(cbss->ies); 6557 ieee80211_get_dtim(ies, 6558 &link->conf->sync_dtim_count, 6559 &link->u.mgd.dtim_period); 6560 link->conf->beacon_int = cbss->beacon_interval; 6561 rcu_read_unlock(); 6562 } 6563 6564 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6565 6566 if (link_id != assoc_data->assoc_link_id) { 6567 link->u.mgd.conn = assoc_data->link[link_id].conn; 6568 6569 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6570 true, &link->u.mgd.conn, 6571 sdata->u.mgd.userspace_selectors); 6572 if (err) { 6573 link_info(link, "prep_channel failed\n"); 6574 goto out_err; 6575 } 6576 } 6577 6578 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6579 assoc_data->link[link_id].bss); 6580 if (err) 6581 goto out_err; 6582 6583 if (!ieee80211_assoc_config_link(link, link_sta, 6584 assoc_data->link[link_id].bss, 6585 mgmt, elem_start, elem_len, 6586 &changed[link_id])) 6587 goto out_err; 6588 6589 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6590 valid_links &= ~BIT(link_id); 6591 ieee80211_sta_remove_link(sta, link_id); 6592 continue; 6593 } 6594 6595 if (link_id != assoc_data->assoc_link_id) { 6596 err = ieee80211_sta_activate_link(sta, link_id); 6597 if (err) 6598 goto out_err; 6599 } 6600 } 6601 6602 /* links might have changed due to rejected ones, set them again */ 6603 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6604 6605 rate_control_rate_init_all_links(sta); 6606 6607 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6608 set_sta_flag(sta, WLAN_STA_MFP); 6609 sta->sta.mfp = true; 6610 } else { 6611 sta->sta.mfp = false; 6612 } 6613 6614 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6615 elems->ext_capab_len); 6616 6617 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6618 local->hw.queues >= IEEE80211_NUM_ACS; 6619 6620 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6621 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6622 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6623 if (err) { 6624 sdata_info(sdata, 6625 "failed to move station %pM to desired state\n", 6626 sta->sta.addr); 6627 WARN_ON(__sta_info_destroy(sta)); 6628 goto out_err; 6629 } 6630 6631 if (sdata->wdev.use_4addr) 6632 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6633 6634 ieee80211_set_associated(sdata, assoc_data, changed); 6635 6636 /* 6637 * If we're using 4-addr mode, let the AP know that we're 6638 * doing so, so that it can create the STA VLAN on its side 6639 */ 6640 if (ifmgd->use_4addr) 6641 ieee80211_send_4addr_nullfunc(local, sdata); 6642 6643 /* 6644 * Start timer to probe the connection to the AP now. 6645 * Also start the timer that will detect beacon loss. 6646 */ 6647 ieee80211_sta_reset_beacon_monitor(sdata); 6648 ieee80211_sta_reset_conn_monitor(sdata); 6649 6650 return true; 6651 out_err: 6652 eth_zero_addr(sdata->vif.cfg.ap_addr); 6653 return false; 6654 } 6655 6656 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6657 struct ieee80211_mgmt *mgmt, 6658 size_t len) 6659 { 6660 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6661 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6662 u16 capab_info, status_code, aid; 6663 struct ieee80211_elems_parse_params parse_params = { 6664 .bss = NULL, 6665 .link_id = -1, 6666 .from_ap = true, 6667 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 6668 }; 6669 struct ieee802_11_elems *elems; 6670 int ac; 6671 const u8 *elem_start; 6672 unsigned int elem_len; 6673 bool reassoc; 6674 struct ieee80211_event event = { 6675 .type = MLME_EVENT, 6676 .u.mlme.data = ASSOC_EVENT, 6677 }; 6678 struct ieee80211_prep_tx_info info = {}; 6679 struct cfg80211_rx_assoc_resp_data resp = { 6680 .uapsd_queues = -1, 6681 }; 6682 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6683 unsigned int link_id; 6684 u16 max_aid = IEEE80211_MAX_AID; 6685 6686 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6687 6688 if (!assoc_data) 6689 return; 6690 6691 info.link_id = assoc_data->assoc_link_id; 6692 6693 parse_params.mode = 6694 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6695 6696 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6697 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6698 return; 6699 6700 /* 6701 * AssocResp and ReassocResp have identical structure, so process both 6702 * of them in this function. 6703 */ 6704 6705 if (len < 24 + 6) 6706 return; 6707 6708 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6709 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6710 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6711 if (assoc_data->s1g) { 6712 elem_start = mgmt->u.s1g_assoc_resp.variable; 6713 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6714 } else { 6715 elem_start = mgmt->u.assoc_resp.variable; 6716 } 6717 6718 /* 6719 * Note: this may not be perfect, AP might misbehave - if 6720 * anyone needs to rely on perfect complete notification 6721 * with the exact right subtype, then we need to track what 6722 * we actually transmitted. 6723 */ 6724 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6725 IEEE80211_STYPE_ASSOC_REQ; 6726 6727 if (assoc_data->fils_kek_len && 6728 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6729 return; 6730 6731 elem_len = len - (elem_start - (u8 *)mgmt); 6732 parse_params.start = elem_start; 6733 parse_params.len = elem_len; 6734 elems = ieee802_11_parse_elems_full(&parse_params); 6735 if (!elems) 6736 goto notify_driver; 6737 6738 if (elems->aid_resp) 6739 aid = le16_to_cpu(elems->aid_resp->aid); 6740 else 6741 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6742 6743 /* 6744 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6745 * an S1G STA the 3 MSBs are reserved. 6746 * (802.11-2016 9.4.1.8 AID field). 6747 */ 6748 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6749 6750 sdata_info(sdata, 6751 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6752 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6753 capab_info, status_code, aid); 6754 6755 ifmgd->broken_ap = false; 6756 6757 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6758 elems->timeout_int && 6759 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6760 u32 tu, ms; 6761 6762 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6763 le32_to_cpu(elems->timeout_int->value)); 6764 6765 tu = le32_to_cpu(elems->timeout_int->value); 6766 ms = tu * 1024 / 1000; 6767 sdata_info(sdata, 6768 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6769 assoc_data->ap_addr, tu, ms); 6770 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6771 assoc_data->timeout_started = true; 6772 assoc_data->comeback = true; 6773 if (ms > IEEE80211_ASSOC_TIMEOUT) 6774 run_again(sdata, assoc_data->timeout); 6775 goto notify_driver; 6776 } 6777 6778 if (status_code != WLAN_STATUS_SUCCESS) { 6779 sdata_info(sdata, "%pM denied association (code=%d)\n", 6780 assoc_data->ap_addr, status_code); 6781 event.u.mlme.status = MLME_DENIED; 6782 event.u.mlme.reason = status_code; 6783 drv_event_callback(sdata->local, sdata, &event); 6784 } else { 6785 if (aid == 0 || aid > max_aid) { 6786 sdata_info(sdata, 6787 "invalid AID value %d (out of range), turn off PS\n", 6788 aid); 6789 aid = 0; 6790 ifmgd->broken_ap = true; 6791 } 6792 6793 if (ieee80211_vif_is_mld(&sdata->vif)) { 6794 struct ieee80211_mle_basic_common_info *common; 6795 6796 if (!elems->ml_basic) { 6797 sdata_info(sdata, 6798 "MLO association with %pM but no (basic) multi-link element in response!\n", 6799 assoc_data->ap_addr); 6800 goto abandon_assoc; 6801 } 6802 6803 common = (void *)elems->ml_basic->variable; 6804 6805 if (memcmp(assoc_data->ap_addr, 6806 common->mld_mac_addr, ETH_ALEN)) { 6807 sdata_info(sdata, 6808 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6809 common->mld_mac_addr, 6810 assoc_data->ap_addr); 6811 goto abandon_assoc; 6812 } 6813 6814 sdata->vif.cfg.eml_cap = 6815 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6816 sdata->vif.cfg.eml_med_sync_delay = 6817 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6818 sdata->vif.cfg.mld_capa_op = 6819 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6820 } 6821 6822 sdata->vif.cfg.aid = aid; 6823 sdata->vif.cfg.s1g = assoc_data->s1g; 6824 6825 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6826 elem_start, elem_len)) { 6827 /* oops -- internal error -- send timeout for now */ 6828 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6829 goto notify_driver; 6830 } 6831 event.u.mlme.status = MLME_SUCCESS; 6832 drv_event_callback(sdata->local, sdata, &event); 6833 sdata_info(sdata, "associated\n"); 6834 6835 info.success = 1; 6836 } 6837 6838 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6839 struct ieee80211_link_data *link; 6840 6841 if (!assoc_data->link[link_id].bss) 6842 continue; 6843 6844 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6845 ether_addr_copy(resp.links[link_id].addr, 6846 assoc_data->link[link_id].addr); 6847 resp.links[link_id].status = assoc_data->link[link_id].status; 6848 6849 link = sdata_dereference(sdata->link[link_id], sdata); 6850 if (!link) 6851 continue; 6852 6853 /* get uapsd queues configuration - same for all links */ 6854 resp.uapsd_queues = 0; 6855 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6856 if (link->tx_conf[ac].uapsd) 6857 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6858 } 6859 6860 if (ieee80211_vif_is_mld(&sdata->vif)) { 6861 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6862 resp.ap_mld_addr = ap_mld_addr; 6863 } 6864 6865 ieee80211_destroy_assoc_data(sdata, 6866 status_code == WLAN_STATUS_SUCCESS ? 6867 ASSOC_SUCCESS : 6868 ASSOC_REJECTED); 6869 6870 resp.buf = (u8 *)mgmt; 6871 resp.len = len; 6872 resp.req_ies = ifmgd->assoc_req_ies; 6873 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6874 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6875 notify_driver: 6876 drv_mgd_complete_tx(sdata->local, sdata, &info); 6877 kfree(elems); 6878 return; 6879 abandon_assoc: 6880 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6881 goto notify_driver; 6882 } 6883 6884 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6885 struct ieee80211_mgmt *mgmt, size_t len, 6886 struct ieee80211_rx_status *rx_status) 6887 { 6888 struct ieee80211_sub_if_data *sdata = link->sdata; 6889 struct ieee80211_local *local = sdata->local; 6890 struct ieee80211_bss *bss; 6891 struct ieee80211_channel *channel; 6892 6893 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6894 6895 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6896 ieee80211_rx_status_to_khz(rx_status)); 6897 if (!channel) 6898 return; 6899 6900 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6901 if (bss) { 6902 link->conf->beacon_rate = bss->beacon_rate; 6903 ieee80211_rx_bss_put(local, bss); 6904 } 6905 } 6906 6907 6908 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6909 struct sk_buff *skb) 6910 { 6911 struct ieee80211_sub_if_data *sdata = link->sdata; 6912 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6913 struct ieee80211_if_managed *ifmgd; 6914 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6915 struct ieee80211_channel *channel; 6916 size_t baselen, len = skb->len; 6917 6918 ifmgd = &sdata->u.mgd; 6919 6920 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6921 6922 /* 6923 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6924 * "If a 6 GHz AP receives a Probe Request frame and responds with 6925 * a Probe Response frame [..], the Address 1 field of the Probe 6926 * Response frame shall be set to the broadcast address [..]" 6927 * So, on 6GHz band we should also accept broadcast responses. 6928 */ 6929 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 6930 ieee80211_rx_status_to_khz(rx_status)); 6931 if (!channel) 6932 return; 6933 6934 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6935 (channel->band != NL80211_BAND_6GHZ || 6936 !is_broadcast_ether_addr(mgmt->da))) 6937 return; /* ignore ProbeResp to foreign address */ 6938 6939 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6940 if (baselen > len) 6941 return; 6942 6943 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6944 6945 if (ifmgd->associated && 6946 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6947 ieee80211_reset_ap_probe(sdata); 6948 } 6949 6950 /* 6951 * This is the canonical list of information elements we care about, 6952 * the filter code also gives us all changes to the Microsoft OUI 6953 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6954 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6955 * changes to requested client power. 6956 * 6957 * We implement beacon filtering in software since that means we can 6958 * avoid processing the frame here and in cfg80211, and userspace 6959 * will not be able to tell whether the hardware supports it or not. 6960 * 6961 * XXX: This list needs to be dynamic -- userspace needs to be able to 6962 * add items it requires. It also needs to be able to tell us to 6963 * look out for other vendor IEs. 6964 */ 6965 static const u64 care_about_ies = 6966 (1ULL << WLAN_EID_COUNTRY) | 6967 (1ULL << WLAN_EID_ERP_INFO) | 6968 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6969 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6970 (1ULL << WLAN_EID_HT_CAPABILITY) | 6971 (1ULL << WLAN_EID_HT_OPERATION) | 6972 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6973 6974 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6975 struct ieee80211_if_managed *ifmgd, 6976 struct ieee80211_bss_conf *bss_conf, 6977 struct ieee80211_local *local, 6978 struct ieee80211_rx_status *rx_status) 6979 { 6980 struct ieee80211_sub_if_data *sdata = link->sdata; 6981 6982 /* Track average RSSI from the Beacon frames of the current AP */ 6983 6984 if (!link->u.mgd.tracking_signal_avg) { 6985 link->u.mgd.tracking_signal_avg = true; 6986 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6987 link->u.mgd.last_cqm_event_signal = 0; 6988 link->u.mgd.count_beacon_signal = 1; 6989 link->u.mgd.last_ave_beacon_signal = 0; 6990 } else { 6991 link->u.mgd.count_beacon_signal++; 6992 } 6993 6994 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6995 -rx_status->signal); 6996 6997 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6998 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6999 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7000 int last_sig = link->u.mgd.last_ave_beacon_signal; 7001 struct ieee80211_event event = { 7002 .type = RSSI_EVENT, 7003 }; 7004 7005 /* 7006 * if signal crosses either of the boundaries, invoke callback 7007 * with appropriate parameters 7008 */ 7009 if (sig > ifmgd->rssi_max_thold && 7010 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 7011 link->u.mgd.last_ave_beacon_signal = sig; 7012 event.u.rssi.data = RSSI_EVENT_HIGH; 7013 drv_event_callback(local, sdata, &event); 7014 } else if (sig < ifmgd->rssi_min_thold && 7015 (last_sig >= ifmgd->rssi_max_thold || 7016 last_sig == 0)) { 7017 link->u.mgd.last_ave_beacon_signal = sig; 7018 event.u.rssi.data = RSSI_EVENT_LOW; 7019 drv_event_callback(local, sdata, &event); 7020 } 7021 } 7022 7023 if (bss_conf->cqm_rssi_thold && 7024 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 7025 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 7026 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7027 int last_event = link->u.mgd.last_cqm_event_signal; 7028 int thold = bss_conf->cqm_rssi_thold; 7029 int hyst = bss_conf->cqm_rssi_hyst; 7030 7031 if (sig < thold && 7032 (last_event == 0 || sig < last_event - hyst)) { 7033 link->u.mgd.last_cqm_event_signal = sig; 7034 ieee80211_cqm_rssi_notify( 7035 &sdata->vif, 7036 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7037 sig, GFP_KERNEL); 7038 } else if (sig > thold && 7039 (last_event == 0 || sig > last_event + hyst)) { 7040 link->u.mgd.last_cqm_event_signal = sig; 7041 ieee80211_cqm_rssi_notify( 7042 &sdata->vif, 7043 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7044 sig, GFP_KERNEL); 7045 } 7046 } 7047 7048 if (bss_conf->cqm_rssi_low && 7049 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 7050 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7051 int last_event = link->u.mgd.last_cqm_event_signal; 7052 int low = bss_conf->cqm_rssi_low; 7053 int high = bss_conf->cqm_rssi_high; 7054 7055 if (sig < low && 7056 (last_event == 0 || last_event >= low)) { 7057 link->u.mgd.last_cqm_event_signal = sig; 7058 ieee80211_cqm_rssi_notify( 7059 &sdata->vif, 7060 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7061 sig, GFP_KERNEL); 7062 } else if (sig > high && 7063 (last_event == 0 || last_event <= high)) { 7064 link->u.mgd.last_cqm_event_signal = sig; 7065 ieee80211_cqm_rssi_notify( 7066 &sdata->vif, 7067 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7068 sig, GFP_KERNEL); 7069 } 7070 } 7071 } 7072 7073 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 7074 struct cfg80211_bss *bss) 7075 { 7076 if (ether_addr_equal(tx_bssid, bss->bssid)) 7077 return true; 7078 if (!bss->transmitted_bss) 7079 return false; 7080 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 7081 } 7082 7083 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 7084 struct wiphy_work *work) 7085 { 7086 struct ieee80211_sub_if_data *sdata = 7087 container_of(work, struct ieee80211_sub_if_data, 7088 u.mgd.ml_reconf_work.work); 7089 u16 new_valid_links, new_active_links, new_dormant_links; 7090 struct sta_info *sta; 7091 int ret; 7092 7093 if (!sdata->u.mgd.removed_links) 7094 return; 7095 7096 sdata_info(sdata, 7097 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 7098 sdata->vif.valid_links, sdata->u.mgd.removed_links); 7099 7100 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 7101 if (new_valid_links == sdata->vif.valid_links) 7102 return; 7103 7104 if (!new_valid_links || 7105 !(new_valid_links & ~sdata->vif.dormant_links)) { 7106 sdata_info(sdata, "No valid links after reconfiguration\n"); 7107 ret = -EINVAL; 7108 goto out; 7109 } 7110 7111 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 7112 if (new_active_links != sdata->vif.active_links) { 7113 if (!new_active_links) 7114 new_active_links = 7115 BIT(ffs(new_valid_links & 7116 ~sdata->vif.dormant_links) - 1); 7117 7118 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 7119 if (ret) { 7120 sdata_info(sdata, 7121 "Failed setting active links\n"); 7122 goto out; 7123 } 7124 } 7125 7126 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7127 if (sta) { 7128 unsigned long removed_links = sdata->u.mgd.removed_links; 7129 unsigned int link_id; 7130 7131 for_each_set_bit(link_id, &removed_links, 7132 IEEE80211_MLD_MAX_NUM_LINKS) 7133 ieee80211_sta_remove_link(sta, link_id); 7134 } 7135 7136 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 7137 7138 ret = ieee80211_vif_set_links(sdata, new_valid_links, 7139 new_dormant_links); 7140 if (ret) 7141 sdata_info(sdata, "Failed setting valid links\n"); 7142 7143 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 7144 7145 out: 7146 if (!ret) 7147 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 7148 else 7149 __ieee80211_disconnect(sdata); 7150 7151 sdata->u.mgd.removed_links = 0; 7152 } 7153 7154 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 7155 struct ieee802_11_elems *elems) 7156 { 7157 const struct element *sub; 7158 unsigned long removed_links = 0; 7159 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7160 u8 link_id; 7161 u32 delay; 7162 7163 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 7164 return; 7165 7166 /* Directly parse the sub elements as the common information doesn't 7167 * hold any useful information. 7168 */ 7169 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 7170 elems->ml_reconf_len) { 7171 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7172 u8 *pos = prof->variable; 7173 u16 control; 7174 7175 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 7176 continue; 7177 7178 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 7179 sub->datalen)) 7180 return; 7181 7182 control = le16_to_cpu(prof->control); 7183 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 7184 7185 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7186 continue; 7187 7188 removed_links |= BIT(link_id); 7189 7190 /* the MAC address should not be included, but handle it */ 7191 if (control & 7192 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 7193 pos += 6; 7194 7195 /* According to Draft P802.11be_D3.0, the control should 7196 * include the AP Removal Timer present. If the AP Removal Timer 7197 * is not present assume immediate removal. 7198 */ 7199 if (control & 7200 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 7201 link_removal_timeout[link_id] = get_unaligned_le16(pos); 7202 } 7203 7204 removed_links &= sdata->vif.valid_links; 7205 if (!removed_links) { 7206 /* In case the removal was cancelled, abort it */ 7207 if (sdata->u.mgd.removed_links) { 7208 sdata->u.mgd.removed_links = 0; 7209 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7210 &sdata->u.mgd.ml_reconf_work); 7211 } 7212 return; 7213 } 7214 7215 delay = 0; 7216 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 7217 struct ieee80211_bss_conf *link_conf = 7218 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 7219 u32 link_delay; 7220 7221 if (!link_conf) { 7222 removed_links &= ~BIT(link_id); 7223 continue; 7224 } 7225 7226 if (link_removal_timeout[link_id] < 1) 7227 link_delay = 0; 7228 else 7229 link_delay = link_conf->beacon_int * 7230 (link_removal_timeout[link_id] - 1); 7231 7232 if (!delay) 7233 delay = link_delay; 7234 else 7235 delay = min(delay, link_delay); 7236 } 7237 7238 sdata->u.mgd.removed_links = removed_links; 7239 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7240 &sdata->u.mgd.ml_reconf_work, 7241 us_to_ktime(ieee80211_tu_to_usec(delay))); 7242 } 7243 7244 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 7245 u16 active_links, u16 dormant_links, 7246 u16 suspended_links) 7247 { 7248 u64 changed = 0; 7249 int ret; 7250 7251 if (!active_links) { 7252 ret = -EINVAL; 7253 goto out; 7254 } 7255 7256 /* If there is an active negotiated TTLM, it should be discarded by 7257 * the new negotiated/advertised TTLM. 7258 */ 7259 if (sdata->vif.neg_ttlm.valid) { 7260 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7261 sdata->vif.suspended_links = 0; 7262 changed = BSS_CHANGED_MLD_TTLM; 7263 } 7264 7265 if (sdata->vif.active_links != active_links) { 7266 /* usable links are affected when active_links are changed, 7267 * so notify the driver about the status change 7268 */ 7269 changed |= BSS_CHANGED_MLD_VALID_LINKS; 7270 active_links &= sdata->vif.active_links; 7271 if (!active_links) 7272 active_links = 7273 BIT(__ffs(sdata->vif.valid_links & 7274 ~dormant_links)); 7275 ret = ieee80211_set_active_links(&sdata->vif, active_links); 7276 if (ret) { 7277 sdata_info(sdata, "Failed to set TTLM active links\n"); 7278 goto out; 7279 } 7280 } 7281 7282 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7283 dormant_links); 7284 if (ret) { 7285 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 7286 goto out; 7287 } 7288 7289 sdata->vif.suspended_links = suspended_links; 7290 if (sdata->vif.suspended_links) 7291 changed |= BSS_CHANGED_MLD_TTLM; 7292 7293 ieee80211_vif_cfg_change_notify(sdata, changed); 7294 7295 out: 7296 if (ret) 7297 ieee80211_disconnect(&sdata->vif, false); 7298 7299 return ret; 7300 } 7301 7302 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 7303 struct wiphy_work *work) 7304 { 7305 u16 new_active_links, new_dormant_links; 7306 struct ieee80211_sub_if_data *sdata = 7307 container_of(work, struct ieee80211_sub_if_data, 7308 u.mgd.ttlm_work.work); 7309 7310 new_active_links = sdata->u.mgd.ttlm_info.map & 7311 sdata->vif.valid_links; 7312 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 7313 sdata->vif.valid_links; 7314 7315 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 7316 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 7317 0)) 7318 return; 7319 7320 sdata->u.mgd.ttlm_info.active = true; 7321 sdata->u.mgd.ttlm_info.switch_time = 0; 7322 } 7323 7324 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7325 struct ieee802_11_elems *elems, 7326 u64 beacon_ts) 7327 { 7328 u8 i; 7329 int ret; 7330 7331 if (!ieee80211_vif_is_mld(&sdata->vif)) 7332 return; 7333 7334 if (!elems->ttlm_num) { 7335 if (sdata->u.mgd.ttlm_info.switch_time) { 7336 /* if a planned TID-to-link mapping was cancelled - 7337 * abort it 7338 */ 7339 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7340 &sdata->u.mgd.ttlm_work); 7341 } else if (sdata->u.mgd.ttlm_info.active) { 7342 /* if no TID-to-link element, set to default mapping in 7343 * which all TIDs are mapped to all setup links 7344 */ 7345 ret = ieee80211_vif_set_links(sdata, 7346 sdata->vif.valid_links, 7347 0); 7348 if (ret) { 7349 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7350 return; 7351 } 7352 ieee80211_vif_cfg_change_notify(sdata, 7353 BSS_CHANGED_MLD_VALID_LINKS); 7354 } 7355 memset(&sdata->u.mgd.ttlm_info, 0, 7356 sizeof(sdata->u.mgd.ttlm_info)); 7357 return; 7358 } 7359 7360 for (i = 0; i < elems->ttlm_num; i++) { 7361 struct ieee80211_adv_ttlm_info ttlm_info; 7362 u32 res; 7363 7364 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7365 &ttlm_info); 7366 7367 if (res) { 7368 __ieee80211_disconnect(sdata); 7369 return; 7370 } 7371 7372 if (ttlm_info.switch_time) { 7373 u16 beacon_ts_tu, st_tu, delay; 7374 u64 delay_usec; 7375 u64 mask; 7376 7377 /* The t2l map switch time is indicated with a partial 7378 * TSF value (bits 10 to 25), get the partial beacon TS 7379 * as well, and calc the delay to the start time. 7380 */ 7381 mask = GENMASK_ULL(25, 10); 7382 beacon_ts_tu = (beacon_ts & mask) >> 10; 7383 st_tu = ttlm_info.switch_time; 7384 delay = st_tu - beacon_ts_tu; 7385 7386 /* 7387 * If the switch time is far in the future, then it 7388 * could also be the previous switch still being 7389 * announced. 7390 * We can simply ignore it for now, if it is a future 7391 * switch the AP will continue to announce it anyway. 7392 */ 7393 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7394 return; 7395 7396 delay_usec = ieee80211_tu_to_usec(delay); 7397 7398 /* Link switching can take time, so schedule it 7399 * 100ms before to be ready on time 7400 */ 7401 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7402 delay_usec -= 7403 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7404 else 7405 delay_usec = 0; 7406 7407 sdata->u.mgd.ttlm_info = ttlm_info; 7408 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7409 &sdata->u.mgd.ttlm_work); 7410 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7411 &sdata->u.mgd.ttlm_work, 7412 us_to_ktime(delay_usec)); 7413 return; 7414 } 7415 } 7416 } 7417 7418 static void 7419 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7420 int reporting_link_id, 7421 struct ieee802_11_elems *elems) 7422 { 7423 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7424 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7425 const struct element *sub; 7426 const u8 *subelems; 7427 size_t subelems_len; 7428 u8 common_size; 7429 int link_id; 7430 7431 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7432 return; 7433 7434 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7435 subelems = (u8 *)elems->ml_basic + common_size; 7436 subelems_len = elems->ml_basic_len - common_size; 7437 7438 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7439 subelems, subelems_len) { 7440 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7441 struct ieee80211_link_data *link; 7442 ssize_t len; 7443 7444 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7445 sub->datalen)) 7446 continue; 7447 7448 link_id = le16_get_bits(prof->control, 7449 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7450 /* need a valid link ID, but also not our own, both AP bugs */ 7451 if (link_id == reporting_link_id || 7452 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7453 continue; 7454 7455 link = sdata_dereference(sdata->link[link_id], sdata); 7456 if (!link) 7457 continue; 7458 7459 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7460 NULL, 0, 7461 IEEE80211_MLE_SUBELEM_FRAGMENT); 7462 if (WARN_ON(len < 0)) 7463 continue; 7464 7465 sta_profiles[link_id] = sub; 7466 sta_profiles_len[link_id] = len; 7467 } 7468 7469 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7470 struct ieee80211_mle_per_sta_profile *prof; 7471 struct ieee802_11_elems *prof_elems; 7472 struct ieee80211_link_data *link; 7473 ssize_t len; 7474 7475 if (link_id == reporting_link_id) 7476 continue; 7477 7478 link = sdata_dereference(sdata->link[link_id], sdata); 7479 if (!link) 7480 continue; 7481 7482 if (!sta_profiles[link_id]) { 7483 prof_elems = NULL; 7484 goto handle; 7485 } 7486 7487 /* we can defragment in-place, won't use the buffer again */ 7488 len = cfg80211_defragment_element(sta_profiles[link_id], 7489 subelems, subelems_len, 7490 (void *)sta_profiles[link_id], 7491 sta_profiles_len[link_id], 7492 IEEE80211_MLE_SUBELEM_FRAGMENT); 7493 if (WARN_ON(len != sta_profiles_len[link_id])) 7494 continue; 7495 7496 prof = (void *)sta_profiles[link_id]; 7497 prof_elems = ieee802_11_parse_elems(prof->variable + 7498 (prof->sta_info_len - 1), 7499 len - 7500 (prof->sta_info_len - 1), 7501 IEEE80211_FTYPE_MGMT | 7502 IEEE80211_STYPE_BEACON, 7503 NULL); 7504 7505 /* memory allocation failed - let's hope that's transient */ 7506 if (!prof_elems) 7507 continue; 7508 7509 handle: 7510 /* 7511 * FIXME: the timings here are obviously incorrect, 7512 * but only older Intel drivers seem to care, and 7513 * those don't have MLO. If you really need this, 7514 * the problem is having to calculate it with the 7515 * TSF offset etc. The device_timestamp is still 7516 * correct, of course. 7517 */ 7518 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7519 IEEE80211_CSA_SOURCE_OTHER_LINK); 7520 kfree(prof_elems); 7521 } 7522 } 7523 7524 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7525 const struct ieee802_11_elems *elems) 7526 { 7527 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7528 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7529 7530 if (!elems->ssid) 7531 return false; 7532 7533 /* hidden SSID: zero length */ 7534 if (elems->ssid_len == 0) 7535 return false; 7536 7537 if (elems->ssid_len != cfg->ssid_len) 7538 return true; 7539 7540 /* hidden SSID: zeroed out */ 7541 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7542 return false; 7543 7544 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7545 } 7546 7547 static bool 7548 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7549 struct ieee80211_mgmt *mgmt, 7550 struct ieee80211_rx_status *rx_status, 7551 struct ieee80211_chanctx_conf *chanctx) 7552 { 7553 u32 pri_2mhz_khz; 7554 struct ieee80211_channel *s1g_sibling_1mhz; 7555 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7556 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7557 7558 if (rx_khz == pri_khz) 7559 return true; 7560 7561 if (!chanctx->def.s1g_primary_2mhz) 7562 return false; 7563 7564 /* 7565 * If we have an S1G interface with a 2MHz primary, beacons are 7566 * sent on the center frequency of the 2MHz primary. Find the sibling 7567 * 1MHz channel and calculate the 2MHz primary center frequency. 7568 */ 7569 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7570 &chanctx->def); 7571 if (!s1g_sibling_1mhz) 7572 return false; 7573 7574 pri_2mhz_khz = 7575 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7576 return rx_khz == pri_2mhz_khz; 7577 } 7578 7579 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7580 struct ieee80211_hdr *hdr, size_t len, 7581 struct ieee80211_rx_status *rx_status) 7582 { 7583 struct ieee80211_sub_if_data *sdata = link->sdata; 7584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7585 struct ieee80211_bss_conf *bss_conf = link->conf; 7586 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7587 struct ieee80211_mgmt *mgmt = (void *) hdr; 7588 struct ieee80211_ext *ext = NULL; 7589 size_t baselen; 7590 struct ieee802_11_elems *elems; 7591 struct ieee80211_local *local = sdata->local; 7592 struct ieee80211_chanctx_conf *chanctx_conf; 7593 struct ieee80211_supported_band *sband; 7594 struct ieee80211_channel *chan; 7595 struct link_sta_info *link_sta; 7596 struct sta_info *sta; 7597 u64 changed = 0; 7598 bool erp_valid; 7599 u8 erp_value = 0; 7600 u32 ncrc = 0; 7601 u8 *bssid, *variable = mgmt->u.beacon.variable; 7602 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7603 struct ieee80211_elems_parse_params parse_params = { 7604 .mode = link->u.mgd.conn.mode, 7605 .link_id = -1, 7606 .from_ap = true, 7607 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7608 }; 7609 7610 lockdep_assert_wiphy(local->hw.wiphy); 7611 7612 /* Process beacon from the current BSS */ 7613 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7614 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7615 ext = (void *)mgmt; 7616 variable = ext->u.s1g_beacon.variable + 7617 ieee80211_s1g_optional_len(ext->frame_control); 7618 } 7619 7620 baselen = (u8 *) variable - (u8 *) mgmt; 7621 if (baselen > len) 7622 return; 7623 7624 parse_params.start = variable; 7625 parse_params.len = len - baselen; 7626 7627 rcu_read_lock(); 7628 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7629 if (!chanctx_conf) { 7630 rcu_read_unlock(); 7631 return; 7632 } 7633 7634 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7635 chanctx_conf)) { 7636 rcu_read_unlock(); 7637 return; 7638 } 7639 chan = chanctx_conf->def.chan; 7640 rcu_read_unlock(); 7641 7642 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7643 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7644 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7645 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7646 elems = ieee802_11_parse_elems_full(&parse_params); 7647 if (!elems) 7648 return; 7649 7650 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7651 7652 if (elems->dtim_period) 7653 link->u.mgd.dtim_period = elems->dtim_period; 7654 link->u.mgd.have_beacon = true; 7655 ifmgd->assoc_data->need_beacon = false; 7656 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7657 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7658 bss_conf->sync_tsf = 7659 le64_to_cpu(mgmt->u.beacon.timestamp); 7660 bss_conf->sync_device_ts = 7661 rx_status->device_timestamp; 7662 bss_conf->sync_dtim_count = elems->dtim_count; 7663 } 7664 7665 if (elems->mbssid_config_ie) 7666 bss_conf->profile_periodicity = 7667 elems->mbssid_config_ie->profile_periodicity; 7668 else 7669 bss_conf->profile_periodicity = 0; 7670 7671 if (elems->ext_capab_len >= 11 && 7672 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7673 bss_conf->ema_ap = true; 7674 else 7675 bss_conf->ema_ap = false; 7676 7677 /* continue assoc process */ 7678 ifmgd->assoc_data->timeout = jiffies; 7679 ifmgd->assoc_data->timeout_started = true; 7680 run_again(sdata, ifmgd->assoc_data->timeout); 7681 kfree(elems); 7682 return; 7683 } 7684 7685 if (!ifmgd->associated || 7686 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7687 return; 7688 bssid = link->u.mgd.bssid; 7689 7690 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7691 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7692 local, rx_status); 7693 7694 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7695 mlme_dbg_ratelimited(sdata, 7696 "cancelling AP probe due to a received beacon\n"); 7697 ieee80211_reset_ap_probe(sdata); 7698 } 7699 7700 /* 7701 * Push the beacon loss detection into the future since 7702 * we are processing a beacon from the AP just now. 7703 */ 7704 ieee80211_sta_reset_beacon_monitor(sdata); 7705 7706 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7707 * element (which carries the beacon interval). Don't forget to add a 7708 * bit to care_about_ies[] above if mac80211 is interested in a 7709 * changing S1G element. 7710 */ 7711 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7712 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7713 parse_params.bss = bss_conf->bss; 7714 parse_params.filter = care_about_ies; 7715 parse_params.crc = ncrc; 7716 elems = ieee802_11_parse_elems_full(&parse_params); 7717 if (!elems) 7718 return; 7719 7720 if (rx_status->flag & RX_FLAG_DECRYPTED && 7721 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7722 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7723 sdata->vif.cfg.ap_addr); 7724 __ieee80211_disconnect(sdata); 7725 return; 7726 } 7727 7728 ncrc = elems->crc; 7729 7730 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7731 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7732 vif_cfg->s1g)) { 7733 if (local->hw.conf.dynamic_ps_timeout > 0) { 7734 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7735 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7736 ieee80211_hw_config(local, -1, 7737 IEEE80211_CONF_CHANGE_PS); 7738 } 7739 ieee80211_send_nullfunc(local, sdata, false); 7740 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7741 local->pspolling = true; 7742 7743 /* 7744 * Here is assumed that the driver will be 7745 * able to send ps-poll frame and receive a 7746 * response even though power save mode is 7747 * enabled, but some drivers might require 7748 * to disable power save here. This needs 7749 * to be investigated. 7750 */ 7751 ieee80211_send_pspoll(local, sdata); 7752 } 7753 } 7754 7755 if (sdata->vif.p2p || 7756 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7757 struct ieee80211_p2p_noa_attr noa = {}; 7758 int ret; 7759 7760 ret = cfg80211_get_p2p_attr(variable, 7761 len - baselen, 7762 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7763 (u8 *) &noa, sizeof(noa)); 7764 if (ret >= 2) { 7765 if (link->u.mgd.p2p_noa_index != noa.index) { 7766 /* valid noa_attr and index changed */ 7767 link->u.mgd.p2p_noa_index = noa.index; 7768 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7769 changed |= BSS_CHANGED_P2P_PS; 7770 /* 7771 * make sure we update all information, the CRC 7772 * mechanism doesn't look at P2P attributes. 7773 */ 7774 link->u.mgd.beacon_crc_valid = false; 7775 } 7776 } else if (link->u.mgd.p2p_noa_index != -1) { 7777 /* noa_attr not found and we had valid noa_attr before */ 7778 link->u.mgd.p2p_noa_index = -1; 7779 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7780 changed |= BSS_CHANGED_P2P_PS; 7781 link->u.mgd.beacon_crc_valid = false; 7782 } 7783 } 7784 7785 /* 7786 * Update beacon timing and dtim count on every beacon appearance. This 7787 * will allow the driver to use the most updated values. Do it before 7788 * comparing this one with last received beacon. 7789 * IMPORTANT: These parameters would possibly be out of sync by the time 7790 * the driver will use them. The synchronized view is currently 7791 * guaranteed only in certain callbacks. 7792 */ 7793 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7794 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7795 bss_conf->sync_tsf = 7796 le64_to_cpu(mgmt->u.beacon.timestamp); 7797 bss_conf->sync_device_ts = 7798 rx_status->device_timestamp; 7799 bss_conf->sync_dtim_count = elems->dtim_count; 7800 } 7801 7802 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7803 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7804 parse_params.start, 7805 parse_params.len))) 7806 goto free; 7807 link->u.mgd.beacon_crc = ncrc; 7808 link->u.mgd.beacon_crc_valid = true; 7809 7810 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7811 7812 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7813 rx_status->device_timestamp, 7814 elems, elems, 7815 IEEE80211_CSA_SOURCE_BEACON); 7816 7817 /* note that after this elems->ml_basic can no longer be used fully */ 7818 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7819 7820 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7821 7822 if (!sdata->u.mgd.epcs.enabled && 7823 !link->u.mgd.disable_wmm_tracking && 7824 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7825 elems->wmm_param_len, 7826 elems->mu_edca_param_set)) 7827 changed |= BSS_CHANGED_QOS; 7828 7829 /* 7830 * If we haven't had a beacon before, tell the driver about the 7831 * DTIM period (and beacon timing if desired) now. 7832 */ 7833 if (!link->u.mgd.have_beacon) { 7834 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7835 bss_conf->dtim_period = elems->dtim_period ?: 1; 7836 7837 changed |= BSS_CHANGED_BEACON_INFO; 7838 link->u.mgd.have_beacon = true; 7839 7840 ieee80211_recalc_ps(local); 7841 7842 ieee80211_recalc_ps_vif(sdata); 7843 } 7844 7845 if (elems->erp_info) { 7846 erp_valid = true; 7847 erp_value = elems->erp_info[0]; 7848 } else { 7849 erp_valid = false; 7850 } 7851 7852 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7853 changed |= ieee80211_handle_bss_capability(link, 7854 le16_to_cpu(mgmt->u.beacon.capab_info), 7855 erp_valid, erp_value); 7856 7857 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7858 if (WARN_ON(!sta)) { 7859 goto free; 7860 } 7861 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7862 lockdep_is_held(&local->hw.wiphy->mtx)); 7863 if (WARN_ON(!link_sta)) { 7864 goto free; 7865 } 7866 7867 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7868 goto free; 7869 7870 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7871 7872 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7873 7874 if (ieee80211_config_bw(link, elems, true, &changed, 7875 IEEE80211_STYPE_BEACON)) { 7876 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7877 WLAN_REASON_DEAUTH_LEAVING, 7878 true, deauth_buf); 7879 ieee80211_report_disconnect(sdata, deauth_buf, 7880 sizeof(deauth_buf), true, 7881 WLAN_REASON_DEAUTH_LEAVING, 7882 false); 7883 goto free; 7884 } 7885 7886 if (elems->opmode_notif) 7887 ieee80211_vht_handle_opmode(sdata, link_sta, 7888 *elems->opmode_notif, 7889 rx_status->band); 7890 7891 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7892 elems->country_elem, 7893 elems->country_elem_len, 7894 elems->pwr_constr_elem, 7895 elems->cisco_dtpc_elem); 7896 7897 ieee80211_ml_reconfiguration(sdata, elems); 7898 ieee80211_process_adv_ttlm(sdata, elems, 7899 le64_to_cpu(mgmt->u.beacon.timestamp)); 7900 7901 ieee80211_link_info_change_notify(sdata, link, changed); 7902 free: 7903 kfree(elems); 7904 } 7905 7906 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7907 struct ieee80211_neg_ttlm neg_ttlm) 7908 { 7909 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7910 u8 i; 7911 7912 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7913 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7914 7915 /* If there is an active TTLM, unset previously suspended links */ 7916 if (sdata->vif.neg_ttlm.valid) 7917 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7918 7919 /* exclude links that are already disabled by advertised TTLM */ 7920 new_active_links = 7921 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7922 new_suspended_links = 7923 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7924 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7925 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7926 new_dormant_links, new_suspended_links)) 7927 return; 7928 7929 sdata->vif.neg_ttlm = neg_ttlm; 7930 sdata->vif.neg_ttlm.valid = true; 7931 } 7932 7933 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7934 struct wiphy_work *work) 7935 { 7936 struct ieee80211_sub_if_data *sdata = 7937 container_of(work, struct ieee80211_sub_if_data, 7938 u.mgd.neg_ttlm_timeout_work.work); 7939 7940 sdata_info(sdata, 7941 "No negotiated TTLM response from AP, disconnecting.\n"); 7942 7943 __ieee80211_disconnect(sdata); 7944 } 7945 7946 static void 7947 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7948 struct ieee80211_neg_ttlm *neg_ttlm) 7949 { 7950 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7951 7952 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7953 sizeof(neg_ttlm->downlink))) { 7954 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7955 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7956 } else { 7957 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7958 } 7959 7960 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7961 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7962 __le16 map; 7963 7964 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7965 7966 pos = skb_put(skb, len + 2); 7967 *pos++ = WLAN_EID_EXTENSION; 7968 len_pos = pos++; 7969 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7970 *pos++ = direction[i]; 7971 map_ind_pos = pos++; 7972 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7973 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7974 cpu_to_le16(neg_ttlm->uplink[tid]) : 7975 cpu_to_le16(neg_ttlm->downlink[tid]); 7976 if (!map) 7977 continue; 7978 7979 len += 2; 7980 map_ind |= BIT(tid); 7981 skb_put_data(skb, &map, sizeof(map)); 7982 } 7983 7984 *map_ind_pos = map_ind; 7985 *len_pos = len; 7986 7987 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7988 break; 7989 } 7990 } 7991 7992 static void 7993 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7994 struct ieee80211_neg_ttlm *neg_ttlm, 7995 u8 dialog_token) 7996 { 7997 struct ieee80211_local *local = sdata->local; 7998 struct ieee80211_mgmt *mgmt; 7999 struct sk_buff *skb; 8000 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_req); 8001 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8002 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8003 8004 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8005 if (!skb) 8006 return; 8007 8008 skb_reserve(skb, local->tx_headroom); 8009 mgmt = skb_put_zero(skb, hdr_len); 8010 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8011 IEEE80211_STYPE_ACTION); 8012 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8013 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8014 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8015 8016 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8017 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 8018 mgmt->u.action.ttlm_req.dialog_token = dialog_token; 8019 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8020 ieee80211_tx_skb(sdata, skb); 8021 } 8022 8023 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8024 struct cfg80211_ttlm_params *params) 8025 { 8026 struct ieee80211_neg_ttlm neg_ttlm = {}; 8027 u8 i; 8028 8029 if (!ieee80211_vif_is_mld(&sdata->vif) || 8030 !(sdata->vif.cfg.mld_capa_op & 8031 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 8032 return -EINVAL; 8033 8034 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8035 if ((params->dlink[i] & ~sdata->vif.valid_links) || 8036 (params->ulink[i] & ~sdata->vif.valid_links)) 8037 return -EINVAL; 8038 8039 neg_ttlm.downlink[i] = params->dlink[i]; 8040 neg_ttlm.uplink[i] = params->ulink[i]; 8041 } 8042 8043 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 8044 NEG_TTLM_RES_ACCEPT) 8045 return -EINVAL; 8046 8047 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8048 sdata->u.mgd.dialog_token_alloc++; 8049 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 8050 sdata->u.mgd.dialog_token_alloc); 8051 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8052 &sdata->u.mgd.neg_ttlm_timeout_work); 8053 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 8054 &sdata->u.mgd.neg_ttlm_timeout_work, 8055 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 8056 return 0; 8057 } 8058 8059 static void 8060 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8061 enum ieee80211_neg_ttlm_res ttlm_res, 8062 u8 dialog_token, 8063 struct ieee80211_neg_ttlm *neg_ttlm) 8064 { 8065 struct ieee80211_local *local = sdata->local; 8066 struct ieee80211_mgmt *mgmt; 8067 struct sk_buff *skb; 8068 int hdr_len = IEEE80211_MIN_ACTION_SIZE(ttlm_res); 8069 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8070 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8071 u16 status_code; 8072 8073 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8074 if (!skb) 8075 return; 8076 8077 skb_reserve(skb, local->tx_headroom); 8078 mgmt = skb_put_zero(skb, hdr_len); 8079 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8080 IEEE80211_STYPE_ACTION); 8081 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8082 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8083 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8084 8085 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8086 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 8087 mgmt->u.action.ttlm_res.dialog_token = dialog_token; 8088 switch (ttlm_res) { 8089 default: 8090 WARN_ON(1); 8091 fallthrough; 8092 case NEG_TTLM_RES_REJECT: 8093 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 8094 break; 8095 case NEG_TTLM_RES_ACCEPT: 8096 status_code = WLAN_STATUS_SUCCESS; 8097 break; 8098 case NEG_TTLM_RES_SUGGEST_PREFERRED: 8099 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 8100 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8101 break; 8102 } 8103 8104 mgmt->u.action.ttlm_res.status_code = cpu_to_le16(status_code); 8105 ieee80211_tx_skb(sdata, skb); 8106 } 8107 8108 static int 8109 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8110 const struct ieee80211_ttlm_elem *ttlm, 8111 struct ieee80211_neg_ttlm *neg_ttlm, 8112 u8 *direction) 8113 { 8114 u8 control, link_map_presence, map_size, tid; 8115 u8 *pos; 8116 8117 /* The element size was already validated in 8118 * ieee80211_tid_to_link_map_size_ok() 8119 */ 8120 pos = (void *)ttlm->optional; 8121 8122 control = ttlm->control; 8123 8124 /* mapping switch time and expected duration fields are not expected 8125 * in case of negotiated TTLM 8126 */ 8127 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 8128 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 8129 mlme_dbg(sdata, 8130 "Invalid TTLM element in negotiated TTLM request\n"); 8131 return -EINVAL; 8132 } 8133 8134 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 8135 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8136 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 8137 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 8138 } 8139 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 8140 return 0; 8141 } 8142 8143 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 8144 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 8145 *direction != IEEE80211_TTLM_DIRECTION_UP && 8146 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 8147 return -EINVAL; 8148 8149 link_map_presence = *pos; 8150 pos++; 8151 8152 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 8153 map_size = 1; 8154 else 8155 map_size = 2; 8156 8157 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8158 u16 map; 8159 8160 if (link_map_presence & BIT(tid)) { 8161 map = ieee80211_get_ttlm(map_size, pos); 8162 if (!map) { 8163 mlme_dbg(sdata, 8164 "No active links for TID %d", tid); 8165 return -EINVAL; 8166 } 8167 } else { 8168 map = 0; 8169 } 8170 8171 switch (*direction) { 8172 case IEEE80211_TTLM_DIRECTION_BOTH: 8173 neg_ttlm->downlink[tid] = map; 8174 neg_ttlm->uplink[tid] = map; 8175 break; 8176 case IEEE80211_TTLM_DIRECTION_DOWN: 8177 neg_ttlm->downlink[tid] = map; 8178 break; 8179 case IEEE80211_TTLM_DIRECTION_UP: 8180 neg_ttlm->uplink[tid] = map; 8181 break; 8182 default: 8183 return -EINVAL; 8184 } 8185 pos += map_size; 8186 } 8187 return 0; 8188 } 8189 8190 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 8191 struct ieee80211_mgmt *mgmt, size_t len) 8192 { 8193 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 8194 size_t ies_len; 8195 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 8196 struct ieee802_11_elems *elems = NULL; 8197 struct ieee80211_neg_ttlm neg_ttlm = {}; 8198 8199 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 8200 8201 if (!ieee80211_vif_is_mld(&sdata->vif)) 8202 return; 8203 8204 dialog_token = mgmt->u.action.ttlm_req.dialog_token; 8205 ies_len = len - IEEE80211_MIN_ACTION_SIZE(ttlm_req); 8206 elems = ieee802_11_parse_elems(mgmt->u.action.ttlm_req.variable, 8207 ies_len, 8208 IEEE80211_FTYPE_MGMT | 8209 IEEE80211_STYPE_ACTION, 8210 NULL); 8211 if (!elems) { 8212 ttlm_res = NEG_TTLM_RES_REJECT; 8213 goto out; 8214 } 8215 8216 for (i = 0; i < elems->ttlm_num; i++) { 8217 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 8218 &neg_ttlm, &direction[i]) || 8219 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 8220 elems->ttlm_num != 1)) { 8221 ttlm_res = NEG_TTLM_RES_REJECT; 8222 goto out; 8223 } 8224 } 8225 8226 if (!elems->ttlm_num || 8227 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 8228 ttlm_res = NEG_TTLM_RES_REJECT; 8229 goto out; 8230 } 8231 8232 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8233 if ((neg_ttlm.downlink[i] && 8234 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 8235 (neg_ttlm.uplink[i] && 8236 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 8237 ttlm_res = NEG_TTLM_RES_REJECT; 8238 goto out; 8239 } 8240 } 8241 8242 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8243 8244 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8245 goto out; 8246 8247 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8248 out: 8249 kfree(elems); 8250 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8251 } 8252 8253 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8254 struct ieee80211_mgmt *mgmt, size_t len) 8255 { 8256 if (!ieee80211_vif_is_mld(&sdata->vif) || 8257 mgmt->u.action.ttlm_res.dialog_token != sdata->u.mgd.dialog_token_alloc) 8258 return; 8259 8260 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8261 &sdata->u.mgd.neg_ttlm_timeout_work); 8262 8263 /* MLD station sends a TID to link mapping request, mainly to handle 8264 * BTM (BSS transition management) request, in which case it needs to 8265 * restrict the active links set. 8266 * In this case it's not expected that the MLD AP will reject the 8267 * negotiated TTLM request. 8268 * This can be better implemented in the future, to handle request 8269 * rejections. 8270 */ 8271 if (le16_to_cpu(mgmt->u.action.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8272 __ieee80211_disconnect(sdata); 8273 } 8274 8275 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8276 { 8277 u16 new_dormant_links; 8278 8279 if (!sdata->vif.neg_ttlm.valid) 8280 return; 8281 8282 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8283 new_dormant_links = 8284 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8285 sdata->vif.suspended_links = 0; 8286 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8287 new_dormant_links); 8288 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8289 BSS_CHANGED_MLD_VALID_LINKS); 8290 } 8291 8292 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8293 struct wiphy_work *work) 8294 { 8295 struct ieee80211_sub_if_data *sdata = 8296 container_of(work, struct ieee80211_sub_if_data, 8297 u.mgd.teardown_ttlm_work); 8298 8299 ieee80211_process_ttlm_teardown(sdata); 8300 } 8301 8302 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8303 { 8304 int frame_len = IEEE80211_MIN_ACTION_SIZE(ttlm_tear_down); 8305 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8306 struct ieee80211_local *local = sdata->local; 8307 struct ieee80211_mgmt *mgmt; 8308 struct sk_buff *skb; 8309 struct ieee80211_tx_info *info; 8310 8311 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8312 if (!skb) 8313 return; 8314 8315 skb_reserve(skb, local->hw.extra_tx_headroom); 8316 mgmt = skb_put_zero(skb, frame_len); 8317 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8318 IEEE80211_STYPE_ACTION); 8319 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8320 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8321 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8322 8323 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8324 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8325 8326 info = IEEE80211_SKB_CB(skb); 8327 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8328 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8329 ieee80211_tx_skb(sdata, skb); 8330 } 8331 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8332 8333 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8334 struct sk_buff *skb) 8335 { 8336 struct ieee80211_link_data *link = &sdata->deflink; 8337 struct ieee80211_rx_status *rx_status; 8338 struct ieee80211_hdr *hdr; 8339 u16 fc; 8340 8341 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8342 8343 rx_status = (struct ieee80211_rx_status *) skb->cb; 8344 hdr = (struct ieee80211_hdr *) skb->data; 8345 fc = le16_to_cpu(hdr->frame_control); 8346 8347 switch (fc & IEEE80211_FCTL_STYPE) { 8348 case IEEE80211_STYPE_S1G_BEACON: 8349 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8350 break; 8351 } 8352 } 8353 8354 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8355 struct sk_buff *skb) 8356 { 8357 struct ieee80211_link_data *link = &sdata->deflink; 8358 struct ieee80211_rx_status *rx_status; 8359 struct ieee802_11_elems *elems; 8360 struct ieee80211_mgmt *mgmt; 8361 u16 fc; 8362 int ies_len; 8363 8364 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8365 8366 rx_status = (struct ieee80211_rx_status *) skb->cb; 8367 mgmt = (struct ieee80211_mgmt *) skb->data; 8368 fc = le16_to_cpu(mgmt->frame_control); 8369 8370 if (rx_status->link_valid) { 8371 link = sdata_dereference(sdata->link[rx_status->link_id], 8372 sdata); 8373 if (!link) 8374 return; 8375 } 8376 8377 switch (fc & IEEE80211_FCTL_STYPE) { 8378 case IEEE80211_STYPE_BEACON: 8379 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8380 skb->len, rx_status); 8381 break; 8382 case IEEE80211_STYPE_PROBE_RESP: 8383 ieee80211_rx_mgmt_probe_resp(link, skb); 8384 break; 8385 case IEEE80211_STYPE_AUTH: 8386 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8387 break; 8388 case IEEE80211_STYPE_DEAUTH: 8389 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8390 break; 8391 case IEEE80211_STYPE_DISASSOC: 8392 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8393 break; 8394 case IEEE80211_STYPE_ASSOC_RESP: 8395 case IEEE80211_STYPE_REASSOC_RESP: 8396 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8397 break; 8398 case IEEE80211_STYPE_ACTION: 8399 if (!sdata->u.mgd.associated || 8400 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8401 break; 8402 8403 switch (mgmt->u.action.category) { 8404 case WLAN_CATEGORY_SPECTRUM_MGMT: 8405 ies_len = skb->len - 8406 offsetof(struct ieee80211_mgmt, 8407 u.action.chan_switch.variable); 8408 8409 if (ies_len < 0) 8410 break; 8411 8412 /* CSA IE cannot be overridden, no need for BSSID */ 8413 elems = ieee802_11_parse_elems(mgmt->u.action.chan_switch.variable, 8414 ies_len, 8415 IEEE80211_FTYPE_MGMT | 8416 IEEE80211_STYPE_ACTION, 8417 NULL); 8418 8419 if (elems && !elems->parse_error) { 8420 enum ieee80211_csa_source src = 8421 IEEE80211_CSA_SOURCE_PROT_ACTION; 8422 8423 ieee80211_sta_process_chanswitch(link, 8424 rx_status->mactime, 8425 rx_status->device_timestamp, 8426 elems, elems, 8427 src); 8428 } 8429 kfree(elems); 8430 break; 8431 case WLAN_CATEGORY_PUBLIC: 8432 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8433 ies_len = skb->len - 8434 offsetof(struct ieee80211_mgmt, 8435 u.action.ext_chan_switch.variable); 8436 8437 if (ies_len < 0) 8438 break; 8439 8440 /* 8441 * extended CSA IE can't be overridden, no need for 8442 * BSSID 8443 */ 8444 elems = ieee802_11_parse_elems(mgmt->u.action.ext_chan_switch.variable, 8445 ies_len, 8446 IEEE80211_FTYPE_MGMT | 8447 IEEE80211_STYPE_ACTION, 8448 NULL); 8449 8450 if (elems && !elems->parse_error) { 8451 enum ieee80211_csa_source src; 8452 8453 if (mgmt->u.action.category == 8454 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8455 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8456 else 8457 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8458 8459 /* for the handling code pretend it was an IE */ 8460 elems->ext_chansw_ie = 8461 &mgmt->u.action.ext_chan_switch.data; 8462 8463 ieee80211_sta_process_chanswitch(link, 8464 rx_status->mactime, 8465 rx_status->device_timestamp, 8466 elems, elems, 8467 src); 8468 } 8469 8470 kfree(elems); 8471 break; 8472 } 8473 break; 8474 } 8475 } 8476 8477 static void ieee80211_sta_timer(struct timer_list *t) 8478 { 8479 struct ieee80211_sub_if_data *sdata = 8480 timer_container_of(sdata, t, u.mgd.timer); 8481 8482 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8483 } 8484 8485 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8486 u8 reason, bool tx) 8487 { 8488 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8489 8490 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8491 tx, frame_buf); 8492 8493 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8494 reason, false); 8495 } 8496 8497 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8498 { 8499 struct ieee80211_local *local = sdata->local; 8500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8501 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8502 u32 tx_flags = 0; 8503 u16 trans = 1; 8504 u16 status = 0; 8505 struct ieee80211_prep_tx_info info = { 8506 .subtype = IEEE80211_STYPE_AUTH, 8507 }; 8508 8509 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8510 8511 if (WARN_ON_ONCE(!auth_data)) 8512 return -EINVAL; 8513 8514 if (auth_data->algorithm == WLAN_AUTH_EPPKE && 8515 ieee80211_vif_is_mld(&sdata->vif) && 8516 !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 8517 auth_data->data, auth_data->data_len)) 8518 return -EINVAL; 8519 8520 auth_data->tries++; 8521 8522 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8523 sdata_info(sdata, "authentication with %pM timed out\n", 8524 auth_data->ap_addr); 8525 8526 /* 8527 * Most likely AP is not in the range so remove the 8528 * bss struct for that AP. 8529 */ 8530 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8531 8532 return -ETIMEDOUT; 8533 } 8534 8535 if (auth_data->algorithm == WLAN_AUTH_SAE || 8536 auth_data->algorithm == WLAN_AUTH_EPPKE) 8537 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8538 8539 info.link_id = auth_data->link_id; 8540 drv_mgd_prepare_tx(local, sdata, &info); 8541 8542 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8543 auth_data->ap_addr, auth_data->tries, 8544 IEEE80211_AUTH_MAX_TRIES); 8545 8546 auth_data->expected_transaction = 2; 8547 8548 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8549 trans = auth_data->trans; 8550 status = auth_data->status; 8551 auth_data->expected_transaction = trans; 8552 } else if (auth_data->algorithm == WLAN_AUTH_EPPKE) { 8553 trans = auth_data->trans; 8554 status = auth_data->status; 8555 } else if (auth_data->algorithm == WLAN_AUTH_IEEE8021X) { 8556 trans = auth_data->trans; 8557 status = auth_data->status; 8558 auth_data->expected_transaction = trans + 1; 8559 } 8560 8561 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8562 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8563 IEEE80211_TX_INTFL_MLME_CONN_TX; 8564 8565 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8566 auth_data->data, auth_data->data_len, 8567 auth_data->ap_addr, auth_data->ap_addr, 8568 NULL, 0, 0, tx_flags); 8569 8570 if (tx_flags == 0) { 8571 if (auth_data->algorithm == WLAN_AUTH_SAE) 8572 auth_data->timeout = jiffies + 8573 IEEE80211_AUTH_TIMEOUT_SAE; 8574 else 8575 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8576 } else { 8577 auth_data->timeout = 8578 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8579 } 8580 8581 auth_data->timeout_started = true; 8582 run_again(sdata, auth_data->timeout); 8583 8584 return 0; 8585 } 8586 8587 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8588 { 8589 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8590 struct ieee80211_local *local = sdata->local; 8591 int ret; 8592 8593 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8594 8595 assoc_data->tries++; 8596 assoc_data->comeback = false; 8597 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8598 sdata_info(sdata, "association with %pM timed out\n", 8599 assoc_data->ap_addr); 8600 8601 /* 8602 * Most likely AP is not in the range so remove the 8603 * bss struct for that AP. 8604 */ 8605 cfg80211_unlink_bss(local->hw.wiphy, 8606 assoc_data->link[assoc_data->assoc_link_id].bss); 8607 8608 return -ETIMEDOUT; 8609 } 8610 8611 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8612 assoc_data->ap_addr, assoc_data->tries, 8613 IEEE80211_ASSOC_MAX_TRIES); 8614 ret = ieee80211_send_assoc(sdata); 8615 if (ret) 8616 return ret; 8617 8618 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8619 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8620 assoc_data->timeout_started = true; 8621 run_again(sdata, assoc_data->timeout); 8622 } else { 8623 assoc_data->timeout = 8624 round_jiffies_up(jiffies + 8625 IEEE80211_ASSOC_TIMEOUT_LONG); 8626 assoc_data->timeout_started = true; 8627 run_again(sdata, assoc_data->timeout); 8628 } 8629 8630 return 0; 8631 } 8632 8633 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8634 __le16 fc, bool acked) 8635 { 8636 struct ieee80211_local *local = sdata->local; 8637 8638 sdata->u.mgd.status_fc = fc; 8639 sdata->u.mgd.status_acked = acked; 8640 sdata->u.mgd.status_received = true; 8641 8642 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8643 } 8644 8645 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8646 { 8647 struct ieee80211_local *local = sdata->local; 8648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8649 8650 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8651 8652 if (ifmgd->status_received) { 8653 __le16 fc = ifmgd->status_fc; 8654 bool status_acked = ifmgd->status_acked; 8655 8656 ifmgd->status_received = false; 8657 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8658 if (status_acked) { 8659 if (ifmgd->auth_data->algorithm == 8660 WLAN_AUTH_SAE) 8661 ifmgd->auth_data->timeout = 8662 jiffies + 8663 IEEE80211_AUTH_TIMEOUT_SAE; 8664 else 8665 ifmgd->auth_data->timeout = 8666 jiffies + 8667 IEEE80211_AUTH_TIMEOUT_SHORT; 8668 run_again(sdata, ifmgd->auth_data->timeout); 8669 } else { 8670 ifmgd->auth_data->timeout = jiffies - 1; 8671 } 8672 ifmgd->auth_data->timeout_started = true; 8673 } else if (ifmgd->assoc_data && 8674 !ifmgd->assoc_data->comeback && 8675 (ieee80211_is_assoc_req(fc) || 8676 ieee80211_is_reassoc_req(fc))) { 8677 /* 8678 * Update association timeout based on the TX status 8679 * for the (Re)Association Request frame. Skip this if 8680 * we have already processed a (Re)Association Response 8681 * frame that indicated need for association comeback 8682 * at a specific time in the future. This could happen 8683 * if the TX status information is delayed enough for 8684 * the response to be received and processed first. 8685 */ 8686 if (status_acked) { 8687 ifmgd->assoc_data->timeout = 8688 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8689 run_again(sdata, ifmgd->assoc_data->timeout); 8690 } else { 8691 ifmgd->assoc_data->timeout = jiffies - 1; 8692 } 8693 ifmgd->assoc_data->timeout_started = true; 8694 } 8695 } 8696 8697 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8698 time_after(jiffies, ifmgd->auth_data->timeout)) { 8699 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8700 /* 8701 * ok ... we waited for assoc or continuation but 8702 * userspace didn't do it, so kill the auth data 8703 */ 8704 ieee80211_destroy_auth_data(sdata, false); 8705 } else if (ieee80211_auth(sdata)) { 8706 u8 ap_addr[ETH_ALEN]; 8707 struct ieee80211_event event = { 8708 .type = MLME_EVENT, 8709 .u.mlme.data = AUTH_EVENT, 8710 .u.mlme.status = MLME_TIMEOUT, 8711 }; 8712 8713 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8714 8715 ieee80211_destroy_auth_data(sdata, false); 8716 8717 cfg80211_auth_timeout(sdata->dev, ap_addr); 8718 drv_event_callback(sdata->local, sdata, &event); 8719 } 8720 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8721 run_again(sdata, ifmgd->auth_data->timeout); 8722 8723 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8724 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8725 if ((ifmgd->assoc_data->need_beacon && 8726 !sdata->deflink.u.mgd.have_beacon) || 8727 ieee80211_do_assoc(sdata)) { 8728 struct ieee80211_event event = { 8729 .type = MLME_EVENT, 8730 .u.mlme.data = ASSOC_EVENT, 8731 .u.mlme.status = MLME_TIMEOUT, 8732 }; 8733 8734 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8735 drv_event_callback(sdata->local, sdata, &event); 8736 } 8737 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8738 run_again(sdata, ifmgd->assoc_data->timeout); 8739 8740 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8741 ifmgd->associated) { 8742 u8 *bssid = sdata->deflink.u.mgd.bssid; 8743 int max_tries; 8744 8745 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8746 max_tries = max_nullfunc_tries; 8747 else 8748 max_tries = max_probe_tries; 8749 8750 /* ACK received for nullfunc probing frame */ 8751 if (!ifmgd->probe_send_count) 8752 ieee80211_reset_ap_probe(sdata); 8753 else if (ifmgd->nullfunc_failed) { 8754 if (ifmgd->probe_send_count < max_tries) { 8755 mlme_dbg(sdata, 8756 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8757 bssid, ifmgd->probe_send_count, 8758 max_tries); 8759 ieee80211_mgd_probe_ap_send(sdata); 8760 } else { 8761 mlme_dbg(sdata, 8762 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8763 bssid); 8764 ieee80211_sta_connection_lost(sdata, 8765 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8766 false); 8767 } 8768 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8769 run_again(sdata, ifmgd->probe_timeout); 8770 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8771 mlme_dbg(sdata, 8772 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8773 bssid, probe_wait_ms); 8774 ieee80211_sta_connection_lost(sdata, 8775 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8776 } else if (ifmgd->probe_send_count < max_tries) { 8777 mlme_dbg(sdata, 8778 "No probe response from AP %pM after %dms, try %d/%i\n", 8779 bssid, probe_wait_ms, 8780 ifmgd->probe_send_count, max_tries); 8781 ieee80211_mgd_probe_ap_send(sdata); 8782 } else { 8783 /* 8784 * We actually lost the connection ... or did we? 8785 * Let's make sure! 8786 */ 8787 mlme_dbg(sdata, 8788 "No probe response from AP %pM after %dms, disconnecting.\n", 8789 bssid, probe_wait_ms); 8790 8791 ieee80211_sta_connection_lost(sdata, 8792 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8793 } 8794 } 8795 } 8796 8797 static bool 8798 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8799 { 8800 /* 8801 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8802 * the links. 8803 */ 8804 struct ieee80211_link_data *link; 8805 8806 guard(rcu)(); 8807 8808 for_each_link_data_rcu(sdata, link) { 8809 if (!(link->conf->csa_active && 8810 !link->u.mgd.csa.waiting_bcn)) 8811 return false; 8812 } 8813 8814 return true; 8815 } 8816 8817 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8818 { 8819 struct ieee80211_sub_if_data *sdata = 8820 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8821 8822 if (ieee80211_is_csa_in_progress(sdata)) 8823 return; 8824 8825 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8826 return; 8827 8828 sdata->u.mgd.connection_loss = false; 8829 wiphy_work_queue(sdata->local->hw.wiphy, 8830 &sdata->u.mgd.beacon_connection_loss_work); 8831 } 8832 8833 static unsigned long 8834 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8835 { 8836 unsigned long latest_timeout = jiffies; 8837 unsigned int link_id; 8838 struct sta_info *sta; 8839 8840 guard(rcu)(); 8841 8842 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8843 if (!sta) 8844 return 0; 8845 8846 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8847 link_id++) { 8848 struct link_sta_info *link_sta; 8849 unsigned long timeout; 8850 8851 link_sta = rcu_dereference(sta->link[link_id]); 8852 if (!link_sta) 8853 continue; 8854 8855 timeout = link_sta->status_stats.last_ack; 8856 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8857 timeout = link_sta->rx_stats.last_rx; 8858 8859 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8860 8861 /* 8862 * latest_timeout holds the timeout of the link 8863 * that will expire last among all links in an 8864 * non-AP MLD STA. This ensures that the connection 8865 * monitor timer is only reset if at least one link 8866 * is still active, and it is scheduled to fire at 8867 * the latest possible timeout. 8868 */ 8869 if (time_after(timeout, latest_timeout)) 8870 latest_timeout = timeout; 8871 } 8872 8873 return latest_timeout; 8874 } 8875 8876 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8877 { 8878 struct ieee80211_sub_if_data *sdata = 8879 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8880 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8881 struct ieee80211_local *local = sdata->local; 8882 unsigned long latest_timeout; 8883 8884 if (ieee80211_is_csa_in_progress(sdata)) 8885 return; 8886 8887 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8888 8889 /* 8890 * If latest timeout is after now, then update timer to fire at 8891 * the later date, but do not actually probe at this time. 8892 */ 8893 if (time_is_after_jiffies(latest_timeout)) { 8894 mod_timer(&ifmgd->conn_mon_timer, 8895 round_jiffies_up(latest_timeout)); 8896 return; 8897 } 8898 8899 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8900 } 8901 8902 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8903 struct wiphy_work *work) 8904 { 8905 struct ieee80211_sub_if_data *sdata = 8906 container_of(work, struct ieee80211_sub_if_data, 8907 u.mgd.monitor_work); 8908 8909 ieee80211_mgd_probe_ap(sdata, false); 8910 } 8911 8912 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8913 { 8914 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8915 __ieee80211_stop_poll(sdata); 8916 8917 /* let's probe the connection once */ 8918 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8919 wiphy_work_queue(sdata->local->hw.wiphy, 8920 &sdata->u.mgd.monitor_work); 8921 } 8922 } 8923 8924 #ifdef CONFIG_PM 8925 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8926 { 8927 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8928 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8929 8930 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8931 8932 if (ifmgd->auth_data || ifmgd->assoc_data) { 8933 const u8 *ap_addr = ifmgd->auth_data ? 8934 ifmgd->auth_data->ap_addr : 8935 ifmgd->assoc_data->ap_addr; 8936 8937 /* 8938 * If we are trying to authenticate / associate while suspending, 8939 * cfg80211 won't know and won't actually abort those attempts, 8940 * thus we need to do that ourselves. 8941 */ 8942 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8943 IEEE80211_STYPE_DEAUTH, 8944 WLAN_REASON_DEAUTH_LEAVING, 8945 false, frame_buf); 8946 if (ifmgd->assoc_data) 8947 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8948 if (ifmgd->auth_data) 8949 ieee80211_destroy_auth_data(sdata, false); 8950 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8951 IEEE80211_DEAUTH_FRAME_LEN, 8952 false); 8953 } 8954 8955 /* This is a bit of a hack - we should find a better and more generic 8956 * solution to this. Normally when suspending, cfg80211 will in fact 8957 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8958 * auth (not so important) or assoc (this is the problem) process. 8959 * 8960 * As a consequence, it can happen that we are in the process of both 8961 * associating and suspending, and receive an association response 8962 * after cfg80211 has checked if it needs to disconnect, but before 8963 * we actually set the flag to drop incoming frames. This will then 8964 * cause the workqueue flush to process the association response in 8965 * the suspend, resulting in a successful association just before it 8966 * tries to remove the interface from the driver, which now though 8967 * has a channel context assigned ... this results in issues. 8968 * 8969 * To work around this (for now) simply deauth here again if we're 8970 * now connected. 8971 */ 8972 if (ifmgd->associated && !sdata->local->wowlan) { 8973 u8 bssid[ETH_ALEN]; 8974 struct cfg80211_deauth_request req = { 8975 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8976 .bssid = bssid, 8977 }; 8978 8979 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8980 ieee80211_mgd_deauth(sdata, &req); 8981 } 8982 } 8983 #endif 8984 8985 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8986 { 8987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8988 8989 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8990 8991 if (!ifmgd->associated) 8992 return; 8993 8994 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8995 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8996 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8997 ieee80211_sta_connection_lost(sdata, 8998 WLAN_REASON_UNSPECIFIED, 8999 true); 9000 return; 9001 } 9002 9003 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 9004 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 9005 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 9006 ieee80211_sta_connection_lost(sdata, 9007 WLAN_REASON_UNSPECIFIED, 9008 true); 9009 return; 9010 } 9011 } 9012 9013 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 9014 struct wiphy_work *work) 9015 { 9016 struct ieee80211_link_data *link = 9017 container_of(work, struct ieee80211_link_data, 9018 u.mgd.request_smps_work); 9019 9020 __ieee80211_request_smps_mgd(link->sdata, link, 9021 link->u.mgd.driver_smps_mode); 9022 } 9023 9024 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 9025 struct wiphy_work *work) 9026 { 9027 struct ieee80211_sub_if_data *sdata = 9028 container_of(work, struct ieee80211_sub_if_data, 9029 u.mgd.reconf.wk.work); 9030 9031 if (!sdata->u.mgd.reconf.added_links && 9032 !sdata->u.mgd.reconf.removed_links) 9033 return; 9034 9035 sdata_info(sdata, 9036 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 9037 sdata->u.mgd.reconf.added_links, 9038 sdata->u.mgd.reconf.removed_links); 9039 9040 __ieee80211_disconnect(sdata); 9041 } 9042 9043 /* interface setup */ 9044 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 9045 { 9046 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9047 9048 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 9049 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 9050 ieee80211_beacon_connection_loss_work); 9051 wiphy_work_init(&ifmgd->csa_connection_drop_work, 9052 ieee80211_csa_connection_drop_work); 9053 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 9054 ieee80211_tdls_peer_del_work); 9055 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 9056 ieee80211_ml_reconf_work); 9057 wiphy_delayed_work_init(&ifmgd->reconf.wk, 9058 ieee80211_ml_sta_reconf_timeout); 9059 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 9060 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 9061 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 9062 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 9063 ieee80211_sta_handle_tspec_ac_params_wk); 9064 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 9065 ieee80211_tid_to_link_map_work); 9066 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 9067 ieee80211_neg_ttlm_timeout_work); 9068 wiphy_work_init(&ifmgd->teardown_ttlm_work, 9069 ieee80211_teardown_ttlm_work); 9070 9071 ifmgd->flags = 0; 9072 ifmgd->powersave = sdata->wdev.ps; 9073 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 9074 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 9075 /* Setup TDLS data */ 9076 spin_lock_init(&ifmgd->teardown_lock); 9077 ifmgd->teardown_skb = NULL; 9078 ifmgd->orig_teardown_skb = NULL; 9079 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 9080 } 9081 9082 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 9083 struct wiphy_work *work) 9084 { 9085 struct ieee80211_link_data *link = 9086 container_of(work, struct ieee80211_link_data, 9087 u.mgd.recalc_smps); 9088 9089 ieee80211_recalc_smps(link->sdata, link); 9090 } 9091 9092 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 9093 { 9094 struct ieee80211_sub_if_data *sdata = link->sdata; 9095 struct ieee80211_local *local = sdata->local; 9096 unsigned int link_id = link->link_id; 9097 9098 link->u.mgd.p2p_noa_index = -1; 9099 link->conf->bssid = link->u.mgd.bssid; 9100 link->smps_mode = IEEE80211_SMPS_OFF; 9101 9102 wiphy_work_init(&link->u.mgd.request_smps_work, 9103 ieee80211_request_smps_mgd_work); 9104 wiphy_work_init(&link->u.mgd.recalc_smps, 9105 ieee80211_recalc_smps_work); 9106 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 9107 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 9108 else 9109 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 9110 9111 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 9112 ieee80211_csa_switch_work); 9113 9114 ieee80211_clear_tpe(&link->conf->tpe); 9115 9116 if (sdata->u.mgd.assoc_data) 9117 ether_addr_copy(link->conf->addr, 9118 sdata->u.mgd.assoc_data->link[link_id].addr); 9119 else if (sdata->u.mgd.reconf.add_links_data) 9120 ether_addr_copy(link->conf->addr, 9121 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 9122 else if (!is_valid_ether_addr(link->conf->addr)) 9123 eth_random_addr(link->conf->addr); 9124 } 9125 9126 /* scan finished notification */ 9127 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 9128 { 9129 struct ieee80211_sub_if_data *sdata; 9130 9131 /* Restart STA timers */ 9132 rcu_read_lock(); 9133 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 9134 if (ieee80211_sdata_running(sdata)) 9135 ieee80211_restart_sta_timer(sdata); 9136 } 9137 rcu_read_unlock(); 9138 } 9139 9140 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 9141 struct cfg80211_bss *cbss, s8 link_id, 9142 const u8 *ap_mld_addr, bool assoc, 9143 struct ieee80211_conn_settings *conn, 9144 bool override, 9145 unsigned long *userspace_selectors) 9146 { 9147 struct ieee80211_local *local = sdata->local; 9148 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9149 struct ieee80211_bss *bss = (void *)cbss->priv; 9150 struct sta_info *new_sta = NULL; 9151 struct ieee80211_link_data *link; 9152 struct sta_info *have_sta = NULL; 9153 bool mlo; 9154 int err; 9155 u16 new_links; 9156 9157 if (link_id >= 0) { 9158 mlo = true; 9159 if (WARN_ON(!ap_mld_addr)) 9160 return -EINVAL; 9161 new_links = BIT(link_id); 9162 } else { 9163 if (WARN_ON(ap_mld_addr)) 9164 return -EINVAL; 9165 ap_mld_addr = cbss->bssid; 9166 new_links = 0; 9167 link_id = 0; 9168 mlo = false; 9169 } 9170 9171 if (assoc) 9172 have_sta = sta_info_get(sdata, ap_mld_addr); 9173 9174 if (mlo && !have_sta && 9175 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 9176 return -EINVAL; 9177 9178 err = ieee80211_vif_set_links(sdata, new_links, 0); 9179 if (err) 9180 return err; 9181 9182 link = sdata_dereference(sdata->link[link_id], sdata); 9183 if (WARN_ON(!link)) { 9184 err = -ENOLINK; 9185 goto out_err; 9186 } 9187 9188 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 9189 err = -EINVAL; 9190 goto out_err; 9191 } 9192 9193 /* If a reconfig is happening, bail out */ 9194 if (local->in_reconfig) { 9195 err = -EBUSY; 9196 goto out_err; 9197 } 9198 9199 if (!have_sta) { 9200 if (mlo) 9201 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 9202 link_id, cbss->bssid, 9203 GFP_KERNEL); 9204 else 9205 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 9206 9207 if (!new_sta) { 9208 err = -ENOMEM; 9209 goto out_err; 9210 } 9211 9212 if (ifmgd->auth_data && 9213 (ifmgd->auth_data->algorithm == WLAN_AUTH_EPPKE || 9214 ifmgd->auth_data->algorithm == WLAN_AUTH_IEEE8021X)) 9215 new_sta->sta.epp_peer = true; 9216 9217 new_sta->sta.mlo = mlo; 9218 } 9219 9220 /* 9221 * Set up the information for the new channel before setting the 9222 * new channel. We can't - completely race-free - change the basic 9223 * rates bitmap and the channel (sband) that it refers to, but if 9224 * we set it up before we at least avoid calling into the driver's 9225 * bss_info_changed() method with invalid information (since we do 9226 * call that from changing the channel - only for IDLE and perhaps 9227 * some others, but ...). 9228 * 9229 * So to avoid that, just set up all the new information before the 9230 * channel, but tell the driver to apply it only afterwards, since 9231 * it might need the new channel for that. 9232 */ 9233 if (new_sta) { 9234 const struct cfg80211_bss_ies *ies; 9235 struct link_sta_info *link_sta; 9236 9237 rcu_read_lock(); 9238 link_sta = rcu_dereference(new_sta->link[link_id]); 9239 if (WARN_ON(!link_sta)) { 9240 rcu_read_unlock(); 9241 sta_info_free(local, new_sta); 9242 err = -EINVAL; 9243 goto out_err; 9244 } 9245 9246 err = ieee80211_mgd_setup_link_sta(link, new_sta, 9247 link_sta, cbss); 9248 if (err) { 9249 rcu_read_unlock(); 9250 sta_info_free(local, new_sta); 9251 goto out_err; 9252 } 9253 9254 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9255 9256 /* set timing information */ 9257 link->conf->beacon_int = cbss->beacon_interval; 9258 ies = rcu_dereference(cbss->beacon_ies); 9259 if (ies) { 9260 link->conf->sync_tsf = ies->tsf; 9261 link->conf->sync_device_ts = 9262 bss->device_ts_beacon; 9263 9264 ieee80211_get_dtim(ies, 9265 &link->conf->sync_dtim_count, 9266 NULL); 9267 } else if (!ieee80211_hw_check(&sdata->local->hw, 9268 TIMING_BEACON_ONLY)) { 9269 ies = rcu_dereference(cbss->proberesp_ies); 9270 /* must be non-NULL since beacon IEs were NULL */ 9271 link->conf->sync_tsf = ies->tsf; 9272 link->conf->sync_device_ts = 9273 bss->device_ts_presp; 9274 link->conf->sync_dtim_count = 0; 9275 } else { 9276 link->conf->sync_tsf = 0; 9277 link->conf->sync_device_ts = 0; 9278 link->conf->sync_dtim_count = 0; 9279 } 9280 rcu_read_unlock(); 9281 } 9282 9283 if (new_sta || override) { 9284 /* 9285 * Only set this if we're also going to calculate the AP 9286 * settings etc., otherwise this was set before in a 9287 * previous call. Note override is set to %true in assoc 9288 * if the settings were changed. 9289 */ 9290 link->u.mgd.conn = *conn; 9291 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9292 mlo, &link->u.mgd.conn, 9293 userspace_selectors); 9294 if (err) { 9295 if (new_sta) 9296 sta_info_free(local, new_sta); 9297 goto out_err; 9298 } 9299 /* pass out for use in assoc */ 9300 *conn = link->u.mgd.conn; 9301 } 9302 9303 if (new_sta) { 9304 /* 9305 * tell driver about BSSID, basic rates and timing 9306 * this was set up above, before setting the channel 9307 */ 9308 ieee80211_link_info_change_notify(sdata, link, 9309 BSS_CHANGED_BSSID | 9310 BSS_CHANGED_BASIC_RATES | 9311 BSS_CHANGED_BEACON_INT); 9312 9313 if (assoc) 9314 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9315 9316 err = sta_info_insert(new_sta); 9317 new_sta = NULL; 9318 if (err) { 9319 sdata_info(sdata, 9320 "failed to insert STA entry for the AP (error %d)\n", 9321 err); 9322 goto out_release_chan; 9323 } 9324 } else 9325 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9326 9327 /* Cancel scan to ensure that nothing interferes with connection */ 9328 if (local->scanning) 9329 ieee80211_scan_cancel(local); 9330 9331 return 0; 9332 9333 out_release_chan: 9334 ieee80211_link_release_channel(link); 9335 out_err: 9336 if (mlo && have_sta) 9337 WARN_ON(__sta_info_destroy(have_sta)); 9338 ieee80211_vif_set_links(sdata, 0, 0); 9339 return err; 9340 } 9341 9342 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9343 const struct cfg80211_bss_ies *ies, 9344 u8 cur_channel, bool ignore_ecsa) 9345 { 9346 const struct element *csa_elem, *ecsa_elem; 9347 struct ieee80211_channel_sw_ie *csa = NULL; 9348 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9349 9350 if (!ies) 9351 return false; 9352 9353 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9354 ies->data, ies->len); 9355 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9356 csa = (void *)csa_elem->data; 9357 9358 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9359 ies->data, ies->len); 9360 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9361 ecsa = (void *)ecsa_elem->data; 9362 9363 if (csa && csa->count == 0) 9364 csa = NULL; 9365 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9366 csa = NULL; 9367 9368 if (ecsa && ecsa->count == 0) 9369 ecsa = NULL; 9370 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9371 ecsa = NULL; 9372 9373 if (ignore_ecsa && ecsa) { 9374 sdata_info(sdata, 9375 "Ignoring ECSA in probe response - was considered stuck!\n"); 9376 return csa; 9377 } 9378 9379 return csa || ecsa; 9380 } 9381 9382 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9383 struct cfg80211_bss *bss) 9384 { 9385 u8 cur_channel; 9386 bool ret; 9387 9388 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9389 9390 rcu_read_lock(); 9391 if (ieee80211_mgd_csa_present(sdata, 9392 rcu_dereference(bss->beacon_ies), 9393 cur_channel, false)) { 9394 ret = true; 9395 goto out; 9396 } 9397 9398 if (ieee80211_mgd_csa_present(sdata, 9399 rcu_dereference(bss->proberesp_ies), 9400 cur_channel, bss->proberesp_ecsa_stuck)) { 9401 ret = true; 9402 goto out; 9403 } 9404 9405 ret = false; 9406 out: 9407 rcu_read_unlock(); 9408 return ret; 9409 } 9410 9411 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9412 const u8 *supported_selectors, 9413 u8 supported_selectors_len) 9414 { 9415 if (supported_selectors) { 9416 for (int i = 0; i < supported_selectors_len; i++) { 9417 set_bit(supported_selectors[i], 9418 userspace_selectors); 9419 } 9420 } else { 9421 /* Assume SAE_H2E support for backward compatibility. */ 9422 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9423 userspace_selectors); 9424 } 9425 } 9426 9427 /* config hooks */ 9428 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9429 struct cfg80211_auth_request *req) 9430 { 9431 struct ieee80211_local *local = sdata->local; 9432 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9433 struct ieee80211_mgd_auth_data *auth_data; 9434 struct ieee80211_conn_settings conn; 9435 struct ieee80211_link_data *link; 9436 struct ieee80211_supported_band *sband; 9437 struct ieee80211_bss *bss; 9438 u16 auth_alg; 9439 int err; 9440 bool cont_auth, wmm_used; 9441 9442 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9443 9444 /* prepare auth data structure */ 9445 9446 switch (req->auth_type) { 9447 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9448 auth_alg = WLAN_AUTH_OPEN; 9449 break; 9450 case NL80211_AUTHTYPE_SHARED_KEY: 9451 if (fips_enabled) 9452 return -EOPNOTSUPP; 9453 auth_alg = WLAN_AUTH_SHARED_KEY; 9454 break; 9455 case NL80211_AUTHTYPE_FT: 9456 auth_alg = WLAN_AUTH_FT; 9457 break; 9458 case NL80211_AUTHTYPE_NETWORK_EAP: 9459 auth_alg = WLAN_AUTH_LEAP; 9460 break; 9461 case NL80211_AUTHTYPE_SAE: 9462 auth_alg = WLAN_AUTH_SAE; 9463 break; 9464 case NL80211_AUTHTYPE_FILS_SK: 9465 auth_alg = WLAN_AUTH_FILS_SK; 9466 break; 9467 case NL80211_AUTHTYPE_FILS_SK_PFS: 9468 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9469 break; 9470 case NL80211_AUTHTYPE_FILS_PK: 9471 auth_alg = WLAN_AUTH_FILS_PK; 9472 break; 9473 case NL80211_AUTHTYPE_EPPKE: 9474 auth_alg = WLAN_AUTH_EPPKE; 9475 break; 9476 case NL80211_AUTHTYPE_IEEE8021X: 9477 auth_alg = WLAN_AUTH_IEEE8021X; 9478 break; 9479 default: 9480 return -EOPNOTSUPP; 9481 } 9482 9483 if (ifmgd->assoc_data) 9484 return -EBUSY; 9485 9486 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9487 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9488 return -EINVAL; 9489 } 9490 9491 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9492 req->ie_len, GFP_KERNEL); 9493 if (!auth_data) 9494 return -ENOMEM; 9495 9496 memcpy(auth_data->ap_addr, 9497 req->ap_mld_addr ?: req->bss->bssid, 9498 ETH_ALEN); 9499 auth_data->bss = req->bss; 9500 auth_data->link_id = req->link_id; 9501 9502 if (req->auth_data_len >= 4) { 9503 if (req->auth_type == NL80211_AUTHTYPE_SAE || 9504 req->auth_type == NL80211_AUTHTYPE_EPPKE || 9505 req->auth_type == NL80211_AUTHTYPE_IEEE8021X) { 9506 __le16 *pos = (__le16 *) req->auth_data; 9507 9508 auth_data->trans = le16_to_cpu(pos[0]); 9509 auth_data->status = le16_to_cpu(pos[1]); 9510 } 9511 9512 memcpy(auth_data->data, req->auth_data + 4, 9513 req->auth_data_len - 4); 9514 auth_data->data_len += req->auth_data_len - 4; 9515 } 9516 9517 /* Check if continuing authentication or trying to authenticate with the 9518 * same BSS that we were in the process of authenticating with and avoid 9519 * removal and re-addition of the STA entry in 9520 * ieee80211_prep_connection(). 9521 */ 9522 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9523 ifmgd->auth_data->link_id == req->link_id; 9524 9525 if (req->ie && req->ie_len) { 9526 memcpy(&auth_data->data[auth_data->data_len], 9527 req->ie, req->ie_len); 9528 auth_data->data_len += req->ie_len; 9529 } 9530 9531 if (req->key && req->key_len) { 9532 auth_data->key_len = req->key_len; 9533 auth_data->key_idx = req->key_idx; 9534 memcpy(auth_data->key, req->key, req->key_len); 9535 } 9536 9537 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9538 req->supported_selectors, 9539 req->supported_selectors_len); 9540 9541 auth_data->algorithm = auth_alg; 9542 9543 /* try to authenticate/probe */ 9544 9545 if (ifmgd->auth_data) { 9546 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9547 auth_data->peer_confirmed = 9548 ifmgd->auth_data->peer_confirmed; 9549 } 9550 ieee80211_destroy_auth_data(sdata, cont_auth); 9551 } 9552 9553 /* prep auth_data so we don't go into idle on disassoc */ 9554 ifmgd->auth_data = auth_data; 9555 9556 /* If this is continuation of an ongoing SAE authentication exchange 9557 * (i.e., request to send SAE Confirm) and the peer has already 9558 * confirmed, mark authentication completed since we are about to send 9559 * out SAE Confirm. 9560 */ 9561 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9562 auth_data->peer_confirmed && auth_data->trans == 2) 9563 ieee80211_mark_sta_auth(sdata); 9564 9565 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_EPPKE && 9566 auth_data->trans == 3) 9567 ieee80211_mark_sta_auth(sdata); 9568 9569 if (ifmgd->associated) { 9570 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9571 9572 sdata_info(sdata, 9573 "disconnect from AP %pM for new auth to %pM\n", 9574 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9575 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9576 WLAN_REASON_UNSPECIFIED, 9577 false, frame_buf); 9578 9579 ieee80211_report_disconnect(sdata, frame_buf, 9580 sizeof(frame_buf), true, 9581 WLAN_REASON_UNSPECIFIED, 9582 false); 9583 } 9584 9585 /* needed for transmitting the auth frame(s) properly */ 9586 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9587 9588 bss = (void *)req->bss->priv; 9589 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9590 9591 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9592 9593 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9594 &conn); 9595 9596 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9597 req->ap_mld_addr, cont_auth, 9598 &conn, false, 9599 auth_data->userspace_selectors); 9600 if (err) 9601 goto err_clear; 9602 9603 if (req->link_id >= 0) 9604 link = sdata_dereference(sdata->link[req->link_id], sdata); 9605 else 9606 link = &sdata->deflink; 9607 9608 if (WARN_ON(!link)) { 9609 err = -ENOLINK; 9610 goto err_clear; 9611 } 9612 9613 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9614 auth_data->ap_addr, link->conf->addr); 9615 9616 err = ieee80211_auth(sdata); 9617 if (err) { 9618 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9619 goto err_clear; 9620 } 9621 9622 /* hold our own reference */ 9623 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9624 return 0; 9625 9626 err_clear: 9627 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9628 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9629 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9630 BSS_CHANGED_BSSID); 9631 ieee80211_link_release_channel(&sdata->deflink); 9632 } 9633 ifmgd->auth_data = NULL; 9634 kfree(auth_data); 9635 return err; 9636 } 9637 9638 static void 9639 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9640 struct ieee80211_mgd_assoc_data *assoc_data, 9641 struct cfg80211_assoc_request *req, 9642 struct ieee80211_conn_settings *conn, 9643 unsigned int link_id) 9644 { 9645 struct ieee80211_local *local = sdata->local; 9646 const struct cfg80211_bss_ies *bss_ies; 9647 struct ieee80211_supported_band *sband; 9648 struct ieee80211_link_data *link; 9649 struct cfg80211_bss *cbss; 9650 struct ieee80211_bss *bss; 9651 9652 cbss = assoc_data->link[link_id].bss; 9653 if (WARN_ON(!cbss)) 9654 return; 9655 9656 bss = (void *)cbss->priv; 9657 9658 sband = local->hw.wiphy->bands[cbss->channel->band]; 9659 if (WARN_ON(!sband)) 9660 return; 9661 9662 link = sdata_dereference(sdata->link[link_id], sdata); 9663 if (WARN_ON(!link)) 9664 return; 9665 9666 /* for MLO connections assume advertising all rates is OK */ 9667 if (!req->ap_mld_addr) { 9668 assoc_data->supp_rates = bss->supp_rates; 9669 assoc_data->supp_rates_len = bss->supp_rates_len; 9670 } 9671 9672 /* copy and link elems for the STA profile */ 9673 if (req->links[link_id].elems_len) { 9674 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9675 req->links[link_id].elems_len); 9676 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9677 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9678 assoc_data->ie_pos += req->links[link_id].elems_len; 9679 } 9680 9681 link->u.mgd.beacon_crc_valid = false; 9682 link->u.mgd.dtim_period = 0; 9683 link->u.mgd.have_beacon = false; 9684 9685 /* override HT configuration only if the AP and we support it */ 9686 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9687 struct ieee80211_sta_ht_cap sta_ht_cap; 9688 9689 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9690 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9691 } 9692 9693 rcu_read_lock(); 9694 bss_ies = rcu_dereference(cbss->beacon_ies); 9695 if (bss_ies) { 9696 u8 dtim_count = 0; 9697 9698 ieee80211_get_dtim(bss_ies, &dtim_count, 9699 &link->u.mgd.dtim_period); 9700 9701 sdata->deflink.u.mgd.have_beacon = true; 9702 9703 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9704 link->conf->sync_tsf = bss_ies->tsf; 9705 link->conf->sync_device_ts = bss->device_ts_beacon; 9706 link->conf->sync_dtim_count = dtim_count; 9707 } 9708 } else { 9709 bss_ies = rcu_dereference(cbss->ies); 9710 } 9711 9712 if (bss_ies) { 9713 const struct element *elem; 9714 9715 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9716 bss_ies->data, bss_ies->len); 9717 if (elem && elem->datalen >= 3) 9718 link->conf->profile_periodicity = elem->data[2]; 9719 else 9720 link->conf->profile_periodicity = 0; 9721 9722 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9723 bss_ies->data, bss_ies->len); 9724 if (elem && elem->datalen >= 11 && 9725 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9726 link->conf->ema_ap = true; 9727 else 9728 link->conf->ema_ap = false; 9729 } 9730 rcu_read_unlock(); 9731 9732 if (bss->corrupt_data) { 9733 char *corrupt_type = "data"; 9734 9735 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9736 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9737 corrupt_type = "beacon and probe response"; 9738 else 9739 corrupt_type = "beacon"; 9740 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9741 corrupt_type = "probe response"; 9742 } 9743 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9744 cbss->bssid, corrupt_type); 9745 } 9746 9747 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9748 if (sdata->u.mgd.powersave) 9749 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9750 else 9751 link->smps_mode = IEEE80211_SMPS_OFF; 9752 } else { 9753 link->smps_mode = link->u.mgd.req_smps; 9754 } 9755 } 9756 9757 static int 9758 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9759 struct ieee80211_mgd_assoc_data *assoc_data, 9760 int link_id) 9761 { 9762 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9763 enum nl80211_band band = cbss->channel->band; 9764 struct ieee80211_supported_band *sband; 9765 const struct element *elem; 9766 int err; 9767 9768 /* neither HT nor VHT elements used on 6 GHz */ 9769 if (band == NL80211_BAND_6GHZ) 9770 return 0; 9771 9772 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9773 return 0; 9774 9775 rcu_read_lock(); 9776 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9777 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9778 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9779 cbss->bssid); 9780 err = -EINVAL; 9781 goto out_rcu; 9782 } 9783 assoc_data->link[link_id].ap_ht_param = 9784 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9785 rcu_read_unlock(); 9786 9787 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9788 return 0; 9789 9790 /* some drivers want to support VHT on 2.4 GHz even */ 9791 sband = sdata->local->hw.wiphy->bands[band]; 9792 if (!sband->vht_cap.vht_supported) 9793 return 0; 9794 9795 rcu_read_lock(); 9796 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9797 /* but even then accept it not being present on the AP */ 9798 if (!elem && band == NL80211_BAND_2GHZ) { 9799 err = 0; 9800 goto out_rcu; 9801 } 9802 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9803 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9804 cbss->bssid); 9805 err = -EINVAL; 9806 goto out_rcu; 9807 } 9808 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9809 sizeof(struct ieee80211_vht_cap)); 9810 rcu_read_unlock(); 9811 9812 return 0; 9813 out_rcu: 9814 rcu_read_unlock(); 9815 return err; 9816 } 9817 9818 static bool 9819 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9820 { 9821 const struct cfg80211_bss_ies *ies; 9822 struct cfg80211_bss *bss; 9823 const struct element *ml; 9824 9825 /* not an MLO connection if link_id < 0, so irrelevant */ 9826 if (req->link_id < 0) 9827 return false; 9828 9829 bss = req->links[req->link_id].bss; 9830 9831 guard(rcu)(); 9832 ies = rcu_dereference(bss->ies); 9833 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9834 ies->data, ies->len) { 9835 const struct ieee80211_multi_link_elem *mle; 9836 9837 if (!ieee80211_mle_type_ok(ml->data + 1, 9838 IEEE80211_ML_CONTROL_TYPE_BASIC, 9839 ml->datalen - 1)) 9840 continue; 9841 9842 mle = (void *)(ml->data + 1); 9843 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9844 return true; 9845 } 9846 9847 return false; 9848 9849 } 9850 9851 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9852 struct cfg80211_assoc_request *req) 9853 { 9854 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9855 struct ieee80211_local *local = sdata->local; 9856 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9857 struct ieee80211_mgd_assoc_data *assoc_data; 9858 const struct element *ssid_elem; 9859 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9860 struct ieee80211_link_data *link; 9861 struct cfg80211_bss *cbss; 9862 bool override, uapsd_supported; 9863 bool match_auth; 9864 int i, err; 9865 size_t size = sizeof(*assoc_data) + req->ie_len; 9866 9867 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9868 size += req->links[i].elems_len; 9869 9870 assoc_data = kzalloc(size, GFP_KERNEL); 9871 if (!assoc_data) 9872 return -ENOMEM; 9873 9874 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9875 9876 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9877 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9878 err = -EINVAL; 9879 goto err_free; 9880 } 9881 9882 rcu_read_lock(); 9883 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9884 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9885 rcu_read_unlock(); 9886 err = -EINVAL; 9887 goto err_free; 9888 } 9889 9890 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9891 assoc_data->ssid_len = ssid_elem->datalen; 9892 rcu_read_unlock(); 9893 9894 if (req->ap_mld_addr) 9895 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9896 else 9897 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9898 9899 /* 9900 * Many APs have broken parsing of the extended MLD capa/ops field, 9901 * dropping (re-)association request frames or replying with association 9902 * response with a failure status if it's present. 9903 * Set our value from the userspace request only in strict mode or if 9904 * the AP also had that field present. 9905 */ 9906 if (ieee80211_hw_check(&local->hw, STRICT) || 9907 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9908 assoc_data->ext_mld_capa_ops = 9909 cpu_to_le16(req->ext_mld_capa_ops); 9910 9911 if (ifmgd->associated) { 9912 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9913 9914 sdata_info(sdata, 9915 "disconnect from AP %pM for new assoc to %pM\n", 9916 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9917 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9918 WLAN_REASON_UNSPECIFIED, 9919 false, frame_buf); 9920 9921 ieee80211_report_disconnect(sdata, frame_buf, 9922 sizeof(frame_buf), true, 9923 WLAN_REASON_UNSPECIFIED, 9924 false); 9925 } 9926 9927 memset(sdata->u.mgd.userspace_selectors, 0, 9928 sizeof(sdata->u.mgd.userspace_selectors)); 9929 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9930 req->supported_selectors, 9931 req->supported_selectors_len); 9932 9933 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9934 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9935 sizeof(ifmgd->ht_capa_mask)); 9936 9937 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9938 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9939 sizeof(ifmgd->vht_capa_mask)); 9940 9941 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9942 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9943 sizeof(ifmgd->s1g_capa_mask)); 9944 9945 /* keep some setup (AP STA, channel, ...) if matching */ 9946 match_auth = ifmgd->auth_data && 9947 ether_addr_equal(ifmgd->auth_data->ap_addr, 9948 assoc_data->ap_addr) && 9949 ifmgd->auth_data->link_id == req->link_id; 9950 9951 if (req->ap_mld_addr) { 9952 uapsd_supported = true; 9953 9954 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9955 ASSOC_REQ_DISABLE_VHT | 9956 ASSOC_REQ_DISABLE_HE | 9957 ASSOC_REQ_DISABLE_EHT)) { 9958 err = -EINVAL; 9959 goto err_free; 9960 } 9961 9962 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9963 struct ieee80211_supported_band *sband; 9964 struct cfg80211_bss *link_cbss = req->links[i].bss; 9965 struct ieee80211_bss *bss; 9966 9967 if (!link_cbss) 9968 continue; 9969 9970 bss = (void *)link_cbss->priv; 9971 9972 if (!bss->wmm_used) { 9973 err = -EINVAL; 9974 req->links[i].error = err; 9975 goto err_free; 9976 } 9977 9978 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9979 err = -EINVAL; 9980 req->links[i].error = err; 9981 goto err_free; 9982 } 9983 9984 link = sdata_dereference(sdata->link[i], sdata); 9985 if (link) 9986 ether_addr_copy(assoc_data->link[i].addr, 9987 link->conf->addr); 9988 else 9989 eth_random_addr(assoc_data->link[i].addr); 9990 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9991 9992 if (match_auth && i == assoc_link_id && link) 9993 assoc_data->link[i].conn = link->u.mgd.conn; 9994 else 9995 assoc_data->link[i].conn = 9996 ieee80211_conn_settings_unlimited; 9997 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9998 req, true, i, 9999 &assoc_data->link[i].conn); 10000 assoc_data->link[i].bss = link_cbss; 10001 10002 if (!bss->uapsd_supported) 10003 uapsd_supported = false; 10004 10005 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 10006 err = -EINVAL; 10007 req->links[i].error = err; 10008 goto err_free; 10009 } 10010 10011 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 10012 assoc_data, i); 10013 if (err) { 10014 err = -EINVAL; 10015 req->links[i].error = err; 10016 goto err_free; 10017 } 10018 } 10019 10020 assoc_data->wmm = true; 10021 } else { 10022 struct ieee80211_supported_band *sband; 10023 struct ieee80211_bss *bss = (void *)cbss->priv; 10024 10025 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 10026 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 10027 10028 assoc_data->wmm = bss->wmm_used && 10029 (local->hw.queues >= IEEE80211_NUM_ACS); 10030 10031 if (cbss->channel->band == NL80211_BAND_6GHZ && 10032 req->flags & (ASSOC_REQ_DISABLE_HT | 10033 ASSOC_REQ_DISABLE_VHT | 10034 ASSOC_REQ_DISABLE_HE)) { 10035 err = -EINVAL; 10036 goto err_free; 10037 } 10038 10039 sband = local->hw.wiphy->bands[cbss->channel->band]; 10040 10041 assoc_data->link[0].bss = cbss; 10042 10043 if (match_auth) 10044 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 10045 else 10046 assoc_data->link[0].conn = 10047 ieee80211_conn_settings_unlimited; 10048 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 10049 assoc_data->wmm, 0, 10050 &assoc_data->link[0].conn); 10051 10052 uapsd_supported = bss->uapsd_supported; 10053 10054 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 10055 if (err) 10056 goto err_free; 10057 } 10058 10059 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 10060 10061 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 10062 err = -EBUSY; 10063 goto err_free; 10064 } 10065 10066 if (ifmgd->assoc_data) { 10067 err = -EBUSY; 10068 goto err_free; 10069 } 10070 10071 /* Cleanup is delayed if auth_data matches */ 10072 if (ifmgd->auth_data && !match_auth) 10073 ieee80211_destroy_auth_data(sdata, false); 10074 10075 if (req->ie && req->ie_len) { 10076 memcpy(assoc_data->ie, req->ie, req->ie_len); 10077 assoc_data->ie_len = req->ie_len; 10078 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 10079 } else { 10080 assoc_data->ie_pos = assoc_data->ie; 10081 } 10082 10083 if (req->fils_kek) { 10084 /* should already be checked in cfg80211 - so warn */ 10085 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 10086 err = -EINVAL; 10087 goto err_free; 10088 } 10089 memcpy(assoc_data->fils_kek, req->fils_kek, 10090 req->fils_kek_len); 10091 assoc_data->fils_kek_len = req->fils_kek_len; 10092 } 10093 10094 if (req->fils_nonces) 10095 memcpy(assoc_data->fils_nonces, req->fils_nonces, 10096 2 * FILS_NONCE_LEN); 10097 10098 /* default timeout */ 10099 assoc_data->timeout = jiffies; 10100 assoc_data->timeout_started = true; 10101 10102 assoc_data->assoc_link_id = assoc_link_id; 10103 10104 if (req->ap_mld_addr) { 10105 /* if there was no authentication, set up the link */ 10106 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 10107 if (err) 10108 goto err_clear; 10109 } 10110 10111 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 10112 if (WARN_ON(!link)) { 10113 err = -EINVAL; 10114 goto err_clear; 10115 } 10116 10117 override = link->u.mgd.conn.mode != 10118 assoc_data->link[assoc_link_id].conn.mode || 10119 link->u.mgd.conn.bw_limit != 10120 assoc_data->link[assoc_link_id].conn.bw_limit; 10121 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 10122 10123 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 10124 assoc_link_id); 10125 10126 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 10127 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 10128 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 10129 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 10130 10131 if (assoc_data->wmm && uapsd_supported && 10132 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 10133 assoc_data->uapsd = true; 10134 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 10135 } else { 10136 assoc_data->uapsd = false; 10137 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 10138 } 10139 10140 if (req->prev_bssid) 10141 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 10142 10143 if (req->use_mfp) { 10144 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 10145 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 10146 } else { 10147 ifmgd->mfp = IEEE80211_MFP_DISABLED; 10148 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 10149 } 10150 10151 if (req->flags & ASSOC_REQ_USE_RRM) 10152 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 10153 else 10154 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 10155 10156 if (req->crypto.control_port) 10157 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 10158 else 10159 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 10160 10161 sdata->control_port_protocol = req->crypto.control_port_ethertype; 10162 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 10163 sdata->control_port_over_nl80211 = 10164 req->crypto.control_port_over_nl80211; 10165 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 10166 10167 /* kick off associate process */ 10168 ifmgd->assoc_data = assoc_data; 10169 10170 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 10171 if (!assoc_data->link[i].bss) 10172 continue; 10173 if (i == assoc_data->assoc_link_id) 10174 continue; 10175 /* only calculate the mode, hence link == NULL */ 10176 err = ieee80211_prep_channel(sdata, NULL, i, 10177 assoc_data->link[i].bss, true, 10178 &assoc_data->link[i].conn, 10179 sdata->u.mgd.userspace_selectors); 10180 if (err) { 10181 req->links[i].error = err; 10182 goto err_clear; 10183 } 10184 } 10185 10186 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 10187 vif_cfg->ssid_len = assoc_data->ssid_len; 10188 10189 /* needed for transmitting the assoc frames properly */ 10190 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 10191 10192 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 10193 req->ap_mld_addr, true, 10194 &assoc_data->link[assoc_link_id].conn, 10195 override, 10196 sdata->u.mgd.userspace_selectors); 10197 if (err) 10198 goto err_clear; 10199 10200 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 10201 const struct cfg80211_bss_ies *beacon_ies; 10202 10203 rcu_read_lock(); 10204 beacon_ies = rcu_dereference(req->bss->beacon_ies); 10205 if (!beacon_ies) { 10206 /* 10207 * Wait up to one beacon interval ... 10208 * should this be more if we miss one? 10209 */ 10210 sdata_info(sdata, "waiting for beacon from %pM\n", 10211 link->u.mgd.bssid); 10212 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 10213 assoc_data->timeout_started = true; 10214 assoc_data->need_beacon = true; 10215 } 10216 rcu_read_unlock(); 10217 } 10218 10219 run_again(sdata, assoc_data->timeout); 10220 10221 /* We are associating, clean up auth_data */ 10222 if (ifmgd->auth_data) 10223 ieee80211_destroy_auth_data(sdata, true); 10224 10225 return 0; 10226 err_clear: 10227 if (!ifmgd->auth_data) { 10228 eth_zero_addr(sdata->deflink.u.mgd.bssid); 10229 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 10230 BSS_CHANGED_BSSID); 10231 } 10232 ifmgd->assoc_data = NULL; 10233 err_free: 10234 kfree(assoc_data); 10235 return err; 10236 } 10237 10238 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 10239 struct cfg80211_deauth_request *req) 10240 { 10241 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10242 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10243 bool tx = !req->local_state_change; 10244 struct ieee80211_prep_tx_info info = { 10245 .subtype = IEEE80211_STYPE_DEAUTH, 10246 }; 10247 10248 if (ifmgd->auth_data && 10249 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 10250 sdata_info(sdata, 10251 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 10252 req->bssid, req->reason_code, 10253 ieee80211_get_reason_code_string(req->reason_code)); 10254 10255 info.link_id = ifmgd->auth_data->link_id; 10256 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10257 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10258 IEEE80211_STYPE_DEAUTH, 10259 req->reason_code, tx, 10260 frame_buf); 10261 ieee80211_destroy_auth_data(sdata, false); 10262 ieee80211_report_disconnect(sdata, frame_buf, 10263 sizeof(frame_buf), true, 10264 req->reason_code, false); 10265 drv_mgd_complete_tx(sdata->local, sdata, &info); 10266 return 0; 10267 } 10268 10269 if (ifmgd->assoc_data && 10270 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10271 sdata_info(sdata, 10272 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10273 req->bssid, req->reason_code, 10274 ieee80211_get_reason_code_string(req->reason_code)); 10275 10276 info.link_id = ifmgd->assoc_data->assoc_link_id; 10277 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10278 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10279 IEEE80211_STYPE_DEAUTH, 10280 req->reason_code, tx, 10281 frame_buf); 10282 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10283 ieee80211_report_disconnect(sdata, frame_buf, 10284 sizeof(frame_buf), true, 10285 req->reason_code, false); 10286 drv_mgd_complete_tx(sdata->local, sdata, &info); 10287 return 0; 10288 } 10289 10290 if (ifmgd->associated && 10291 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10292 sdata_info(sdata, 10293 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10294 req->bssid, req->reason_code, 10295 ieee80211_get_reason_code_string(req->reason_code)); 10296 10297 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10298 req->reason_code, tx, frame_buf); 10299 ieee80211_report_disconnect(sdata, frame_buf, 10300 sizeof(frame_buf), true, 10301 req->reason_code, false); 10302 return 0; 10303 } 10304 10305 return -ENOTCONN; 10306 } 10307 10308 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10309 struct cfg80211_disassoc_request *req) 10310 { 10311 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10312 10313 if (!sdata->u.mgd.associated || 10314 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10315 return -ENOTCONN; 10316 10317 sdata_info(sdata, 10318 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10319 req->ap_addr, req->reason_code, 10320 ieee80211_get_reason_code_string(req->reason_code)); 10321 10322 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10323 req->reason_code, !req->local_state_change, 10324 frame_buf); 10325 10326 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10327 req->reason_code, false); 10328 10329 return 0; 10330 } 10331 10332 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10333 { 10334 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10335 &link->u.mgd.request_smps_work); 10336 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10337 &link->u.mgd.recalc_smps); 10338 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10339 &link->u.mgd.csa.switch_work); 10340 } 10341 10342 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10343 { 10344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10345 10346 /* 10347 * Make sure some work items will not run after this, 10348 * they will not do anything but might not have been 10349 * cancelled when disconnecting. 10350 */ 10351 wiphy_work_cancel(sdata->local->hw.wiphy, 10352 &ifmgd->monitor_work); 10353 wiphy_work_cancel(sdata->local->hw.wiphy, 10354 &ifmgd->beacon_connection_loss_work); 10355 wiphy_work_cancel(sdata->local->hw.wiphy, 10356 &ifmgd->csa_connection_drop_work); 10357 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10358 &ifmgd->tdls_peer_del_work); 10359 10360 if (ifmgd->assoc_data) 10361 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10362 if (ifmgd->auth_data) 10363 ieee80211_destroy_auth_data(sdata, false); 10364 spin_lock_bh(&ifmgd->teardown_lock); 10365 if (ifmgd->teardown_skb) { 10366 kfree_skb(ifmgd->teardown_skb); 10367 ifmgd->teardown_skb = NULL; 10368 ifmgd->orig_teardown_skb = NULL; 10369 } 10370 kfree(ifmgd->assoc_req_ies); 10371 ifmgd->assoc_req_ies = NULL; 10372 ifmgd->assoc_req_ies_len = 0; 10373 spin_unlock_bh(&ifmgd->teardown_lock); 10374 timer_delete_sync(&ifmgd->timer); 10375 } 10376 10377 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10378 enum nl80211_cqm_rssi_threshold_event rssi_event, 10379 s32 rssi_level, 10380 gfp_t gfp) 10381 { 10382 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10383 10384 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10385 10386 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10387 } 10388 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10389 10390 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10391 { 10392 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10393 10394 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10395 10396 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10397 } 10398 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10399 10400 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10401 int rssi_min_thold, 10402 int rssi_max_thold) 10403 { 10404 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10405 10406 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10407 return; 10408 10409 /* 10410 * Scale up threshold values before storing it, as the RSSI averaging 10411 * algorithm uses a scaled up value as well. Change this scaling 10412 * factor if the RSSI averaging algorithm changes. 10413 */ 10414 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10415 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10416 } 10417 10418 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10419 int rssi_min_thold, 10420 int rssi_max_thold) 10421 { 10422 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10423 10424 WARN_ON(rssi_min_thold == rssi_max_thold || 10425 rssi_min_thold > rssi_max_thold); 10426 10427 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10428 rssi_max_thold); 10429 } 10430 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10431 10432 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10433 { 10434 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10435 10436 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10437 } 10438 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10439 10440 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10441 struct ieee80211_mgmt *mgmt, size_t len) 10442 { 10443 struct ieee80211_local *local = sdata->local; 10444 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10445 struct ieee80211_mgd_assoc_data *add_links_data = 10446 ifmgd->reconf.add_links_data; 10447 struct sta_info *sta; 10448 struct cfg80211_mlo_reconf_done_data done_data = {}; 10449 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10450 sdata->u.mgd.reconf.removed_links; 10451 u16 link_mask, valid_links; 10452 unsigned int link_id; 10453 size_t orig_len = len; 10454 u8 i, group_key_data_len; 10455 u8 *pos; 10456 10457 if (!ieee80211_vif_is_mld(&sdata->vif) || 10458 len < IEEE80211_MIN_ACTION_SIZE(ml_reconf_resp) || 10459 mgmt->u.action.ml_reconf_resp.dialog_token != 10460 sdata->u.mgd.reconf.dialog_token || 10461 !sta_changed_links) 10462 return; 10463 10464 pos = mgmt->u.action.ml_reconf_resp.variable; 10465 len -= offsetofend(typeof(*mgmt), u.action.ml_reconf_resp); 10466 10467 if (len < mgmt->u.action.ml_reconf_resp.count * 10468 sizeof(struct ieee80211_ml_reconf_status)) { 10469 sdata_info(sdata, 10470 "mlo: reconf: unexpected len=%zu, count=%u\n", 10471 len, mgmt->u.action.ml_reconf_resp.count); 10472 goto disconnect; 10473 } 10474 10475 link_mask = sta_changed_links; 10476 for (i = 0; i < mgmt->u.action.ml_reconf_resp.count; i++) { 10477 struct ieee80211_ml_reconf_status *reconf_status = (void *)pos; 10478 u16 status = le16_to_cpu(reconf_status->status); 10479 10480 link_id = u8_get_bits(reconf_status->info, 10481 IEEE80211_ML_RECONF_LINK_ID_MASK); 10482 10483 if (!(link_mask & BIT(link_id))) { 10484 sdata_info(sdata, 10485 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10486 link_id, sta_changed_links); 10487 goto disconnect; 10488 } 10489 10490 /* clear the corresponding link, to detect the case that 10491 * the same link was included more than one time 10492 */ 10493 link_mask &= ~BIT(link_id); 10494 10495 /* Handle failure to remove links here. Failure to remove added 10496 * links will be done later in the flow. 10497 */ 10498 if (status != WLAN_STATUS_SUCCESS) { 10499 sdata_info(sdata, 10500 "mlo: reconf: failed on link=%u, status=%u\n", 10501 link_id, status); 10502 10503 /* The AP MLD failed to remove a link that was already 10504 * removed locally. As this is not expected behavior, 10505 * disconnect 10506 */ 10507 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10508 goto disconnect; 10509 10510 /* The AP MLD failed to add a link. Remove it from the 10511 * added links. 10512 */ 10513 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10514 } 10515 10516 pos += sizeof(*reconf_status); 10517 len -= sizeof(*reconf_status); 10518 } 10519 10520 if (link_mask) { 10521 sdata_info(sdata, 10522 "mlo: reconf: no response for links=0x%x\n", 10523 link_mask); 10524 goto disconnect; 10525 } 10526 10527 if (!sdata->u.mgd.reconf.added_links) 10528 goto out; 10529 10530 if (len < 1 || len < 1 + *pos) { 10531 sdata_info(sdata, 10532 "mlo: reconf: invalid group key data length"); 10533 goto disconnect; 10534 } 10535 10536 /* The Group Key Data field must be present when links are added. This 10537 * field should be processed by userland. 10538 */ 10539 group_key_data_len = *pos++; 10540 10541 pos += group_key_data_len; 10542 len -= group_key_data_len + 1; 10543 10544 /* Process the information for the added links */ 10545 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10546 if (WARN_ON(!sta)) 10547 goto disconnect; 10548 10549 valid_links = sdata->vif.valid_links; 10550 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10551 if (!add_links_data->link[link_id].bss || 10552 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10553 continue; 10554 10555 valid_links |= BIT(link_id); 10556 if (ieee80211_sta_allocate_link(sta, link_id)) 10557 goto disconnect; 10558 } 10559 10560 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10561 link_mask = 0; 10562 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10563 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10564 struct ieee80211_link_data *link; 10565 struct link_sta_info *link_sta; 10566 u64 changed = 0; 10567 10568 if (!cbss) 10569 continue; 10570 10571 link = sdata_dereference(sdata->link[link_id], sdata); 10572 if (WARN_ON(!link)) 10573 goto disconnect; 10574 10575 link_info(link, 10576 "mlo: reconf: local address %pM, AP link address %pM\n", 10577 add_links_data->link[link_id].addr, 10578 add_links_data->link[link_id].bss->bssid); 10579 10580 link_sta = rcu_dereference_protected(sta->link[link_id], 10581 lockdep_is_held(&local->hw.wiphy->mtx)); 10582 if (WARN_ON(!link_sta)) 10583 goto disconnect; 10584 10585 if (!link->u.mgd.have_beacon) { 10586 const struct cfg80211_bss_ies *ies; 10587 10588 rcu_read_lock(); 10589 ies = rcu_dereference(cbss->beacon_ies); 10590 if (ies) 10591 link->u.mgd.have_beacon = true; 10592 else 10593 ies = rcu_dereference(cbss->ies); 10594 ieee80211_get_dtim(ies, 10595 &link->conf->sync_dtim_count, 10596 &link->u.mgd.dtim_period); 10597 link->conf->beacon_int = cbss->beacon_interval; 10598 rcu_read_unlock(); 10599 } 10600 10601 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10602 10603 link->u.mgd.conn = add_links_data->link[link_id].conn; 10604 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10605 true, &link->u.mgd.conn, 10606 sdata->u.mgd.userspace_selectors)) { 10607 link_info(link, "mlo: reconf: prep_channel failed\n"); 10608 goto disconnect; 10609 } 10610 10611 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10612 add_links_data->link[link_id].bss)) 10613 goto disconnect; 10614 10615 if (!ieee80211_assoc_config_link(link, link_sta, 10616 add_links_data->link[link_id].bss, 10617 mgmt, pos, len, 10618 &changed)) 10619 goto disconnect; 10620 10621 /* The AP MLD indicated success for this link, but the station 10622 * profile status indicated otherwise. Since there is an 10623 * inconsistency in the ML reconfiguration response, disconnect 10624 */ 10625 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10626 goto disconnect; 10627 10628 ieee80211_sta_init_nss(link_sta); 10629 if (ieee80211_sta_activate_link(sta, link_id)) 10630 goto disconnect; 10631 10632 changed |= ieee80211_link_set_associated(link, cbss); 10633 ieee80211_link_info_change_notify(sdata, link, changed); 10634 10635 ieee80211_recalc_smps(sdata, link); 10636 link_mask |= BIT(link_id); 10637 } 10638 10639 sdata_info(sdata, 10640 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10641 valid_links, link_mask); 10642 10643 /* links might have changed due to rejected ones, set them again */ 10644 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10645 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10646 10647 ieee80211_recalc_ps(local); 10648 ieee80211_recalc_ps_vif(sdata); 10649 10650 done_data.buf = (const u8 *)mgmt; 10651 done_data.len = orig_len; 10652 done_data.added_links = link_mask; 10653 10654 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10655 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10656 done_data.links[link_id].addr = 10657 add_links_data->link[link_id].addr; 10658 } 10659 10660 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10661 kfree(sdata->u.mgd.reconf.add_links_data); 10662 sdata->u.mgd.reconf.add_links_data = NULL; 10663 out: 10664 ieee80211_ml_reconf_reset(sdata); 10665 return; 10666 10667 disconnect: 10668 __ieee80211_disconnect(sdata); 10669 } 10670 10671 static struct sk_buff * 10672 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10673 struct ieee80211_mgd_assoc_data *add_links_data, 10674 u16 removed_links, __le16 ext_mld_capa_ops) 10675 { 10676 struct ieee80211_local *local = sdata->local; 10677 struct ieee80211_mgmt *mgmt; 10678 struct ieee80211_multi_link_elem *ml_elem; 10679 struct ieee80211_mle_basic_common_info *common; 10680 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10681 struct sk_buff *skb; 10682 size_t size; 10683 unsigned int link_id; 10684 __le16 eml_capa = 0, mld_capa_ops = 0; 10685 struct ieee80211_tx_info *info; 10686 u8 common_size, var_common_size; 10687 u8 *ml_elem_len; 10688 u16 capab = 0; 10689 10690 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10691 10692 /* Consider the maximal length of the reconfiguration ML element */ 10693 size += sizeof(struct ieee80211_multi_link_elem); 10694 10695 /* The Basic ML element and the Reconfiguration ML element have the same 10696 * fixed common information fields in the context of ML reconfiguration 10697 * action frame. The AP MLD MAC address must always be present 10698 */ 10699 common_size = sizeof(*common); 10700 10701 /* when adding links, the MLD capabilities must be present */ 10702 var_common_size = 0; 10703 if (add_links_data) { 10704 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10705 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10706 ieee80211_vif_type_p2p(&sdata->vif)); 10707 10708 if (ift_ext_capa) { 10709 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10710 mld_capa_ops = 10711 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10712 } 10713 10714 /* MLD capabilities and operation */ 10715 var_common_size += 2; 10716 10717 /* EML capabilities */ 10718 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10719 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10720 var_common_size += 2; 10721 } 10722 10723 if (ext_mld_capa_ops) 10724 var_common_size += 2; 10725 10726 /* Add the common information length */ 10727 size += common_size + var_common_size; 10728 10729 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10730 struct cfg80211_bss *cbss; 10731 size_t elems_len; 10732 10733 if (removed_links & BIT(link_id)) { 10734 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10735 ETH_ALEN; 10736 continue; 10737 } 10738 10739 if (!add_links_data || !add_links_data->link[link_id].bss) 10740 continue; 10741 10742 elems_len = add_links_data->link[link_id].elems_len; 10743 cbss = add_links_data->link[link_id].bss; 10744 10745 /* should be the same across all BSSes */ 10746 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10747 capab |= WLAN_CAPABILITY_PRIVACY; 10748 10749 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10750 ETH_ALEN; 10751 10752 /* WMM */ 10753 size += 9; 10754 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10755 elems_len); 10756 } 10757 10758 skb = alloc_skb(size, GFP_KERNEL); 10759 if (!skb) 10760 return NULL; 10761 10762 skb_reserve(skb, local->hw.extra_tx_headroom); 10763 mgmt = skb_put_zero(skb, IEEE80211_MIN_ACTION_SIZE(ml_reconf_req)); 10764 10765 /* Add the MAC header */ 10766 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10767 IEEE80211_STYPE_ACTION); 10768 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10769 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10770 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10771 10772 /* Add the action frame fixed fields */ 10773 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10774 mgmt->u.action.action_code = WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10775 10776 /* allocate a dialog token and store it */ 10777 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10778 mgmt->u.action.ml_reconf_req.dialog_token = 10779 sdata->u.mgd.reconf.dialog_token; 10780 10781 /* Add the ML reconfiguration element and the common information */ 10782 skb_put_u8(skb, WLAN_EID_EXTENSION); 10783 ml_elem_len = skb_put(skb, 1); 10784 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10785 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10786 ml_elem->control = 10787 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10788 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10789 common = skb_put(skb, common_size); 10790 common->len = common_size + var_common_size; 10791 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10792 10793 if (add_links_data) { 10794 if (eml_capa & 10795 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10796 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10797 ml_elem->control |= 10798 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10799 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10800 } 10801 10802 ml_elem->control |= 10803 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10804 10805 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10806 } 10807 10808 if (ext_mld_capa_ops) { 10809 ml_elem->control |= 10810 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10811 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10812 } 10813 10814 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10815 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10816 10817 /* Add the per station profile */ 10818 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10819 u8 *subelem_len = NULL; 10820 u16 ctrl; 10821 const u8 *addr; 10822 10823 /* Skip links that are not changing */ 10824 if (!(removed_links & BIT(link_id)) && 10825 (!add_links_data || !add_links_data->link[link_id].bss)) 10826 continue; 10827 10828 ctrl = link_id | 10829 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10830 10831 if (removed_links & BIT(link_id)) { 10832 struct ieee80211_bss_conf *conf = 10833 sdata_dereference(sdata->vif.link_conf[link_id], 10834 sdata); 10835 if (!conf) 10836 continue; 10837 10838 addr = conf->addr; 10839 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10840 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10841 } else { 10842 addr = add_links_data->link[link_id].addr; 10843 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10844 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10845 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10846 } 10847 10848 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10849 subelem_len = skb_put(skb, 1); 10850 10851 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10852 skb_put_u8(skb, 1 + ETH_ALEN); 10853 skb_put_data(skb, addr, ETH_ALEN); 10854 10855 if (!(removed_links & BIT(link_id))) { 10856 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10857 size_t extra_used; 10858 void *capab_pos; 10859 u8 qos_info; 10860 10861 capab_pos = skb_put(skb, 2); 10862 10863 extra_used = 10864 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10865 add_links_data->link[link_id].elems, 10866 add_links_data->link[link_id].elems_len, 10867 link_id, NULL, 10868 link_present_elems, 10869 add_links_data); 10870 10871 if (add_links_data->link[link_id].elems) 10872 skb_put_data(skb, 10873 add_links_data->link[link_id].elems + 10874 extra_used, 10875 add_links_data->link[link_id].elems_len - 10876 extra_used); 10877 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10878 qos_info = sdata->u.mgd.uapsd_queues; 10879 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10880 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10881 } else { 10882 qos_info = 0; 10883 } 10884 10885 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10886 put_unaligned_le16(capab, capab_pos); 10887 } 10888 10889 ieee80211_fragment_element(skb, subelem_len, 10890 IEEE80211_MLE_SUBELEM_FRAGMENT); 10891 } 10892 10893 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10894 10895 info = IEEE80211_SKB_CB(skb); 10896 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10897 10898 return skb; 10899 } 10900 10901 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10902 struct cfg80211_ml_reconf_req *req) 10903 { 10904 struct ieee80211_local *local = sdata->local; 10905 struct ieee80211_mgd_assoc_data *data = NULL; 10906 struct sta_info *sta; 10907 struct sk_buff *skb; 10908 u16 added_links, new_valid_links; 10909 int link_id, err; 10910 10911 if (!ieee80211_vif_is_mld(&sdata->vif) || 10912 !(sdata->vif.cfg.mld_capa_op & 10913 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10914 return -EINVAL; 10915 10916 /* No support for concurrent ML reconfiguration operation */ 10917 if (sdata->u.mgd.reconf.added_links || 10918 sdata->u.mgd.reconf.removed_links) 10919 return -EBUSY; 10920 10921 added_links = 0; 10922 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10923 if (!req->add_links[link_id].bss) 10924 continue; 10925 10926 added_links |= BIT(link_id); 10927 } 10928 10929 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10930 if (WARN_ON(!sta)) 10931 return -ENOLINK; 10932 10933 /* Adding links to the set of valid link is done only after a successful 10934 * ML reconfiguration frame exchange. Here prepare the data for the ML 10935 * reconfiguration frame construction and allocate the required 10936 * resources 10937 */ 10938 if (added_links) { 10939 bool uapsd_supported; 10940 10941 data = kzalloc_obj(*data); 10942 if (!data) 10943 return -ENOMEM; 10944 10945 data->assoc_link_id = -1; 10946 data->wmm = true; 10947 10948 uapsd_supported = true; 10949 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10950 link_id++) { 10951 struct ieee80211_supported_band *sband; 10952 struct cfg80211_bss *link_cbss = 10953 req->add_links[link_id].bss; 10954 struct ieee80211_bss *bss; 10955 10956 if (!link_cbss) 10957 continue; 10958 10959 bss = (void *)link_cbss->priv; 10960 10961 if (!bss->wmm_used) { 10962 err = -EINVAL; 10963 goto err_free; 10964 } 10965 10966 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10967 err = -EINVAL; 10968 goto err_free; 10969 } 10970 10971 eth_random_addr(data->link[link_id].addr); 10972 data->link[link_id].conn = 10973 ieee80211_conn_settings_unlimited; 10974 sband = 10975 local->hw.wiphy->bands[link_cbss->channel->band]; 10976 10977 ieee80211_determine_our_sta_mode(sdata, sband, 10978 NULL, true, link_id, 10979 &data->link[link_id].conn); 10980 10981 data->link[link_id].bss = link_cbss; 10982 data->link[link_id].elems = 10983 (u8 *)req->add_links[link_id].elems; 10984 data->link[link_id].elems_len = 10985 req->add_links[link_id].elems_len; 10986 10987 if (!bss->uapsd_supported) 10988 uapsd_supported = false; 10989 10990 if (data->link[link_id].conn.mode < 10991 IEEE80211_CONN_MODE_EHT) { 10992 err = -EINVAL; 10993 goto err_free; 10994 } 10995 10996 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10997 link_id); 10998 if (err) { 10999 err = -EINVAL; 11000 goto err_free; 11001 } 11002 } 11003 11004 /* Require U-APSD support if we enabled it */ 11005 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 11006 !uapsd_supported) { 11007 err = -EINVAL; 11008 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 11009 goto err_free; 11010 } 11011 11012 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11013 link_id++) { 11014 if (!data->link[link_id].bss) 11015 continue; 11016 11017 /* only used to verify the mode, nothing is allocated */ 11018 err = ieee80211_prep_channel(sdata, NULL, link_id, 11019 data->link[link_id].bss, 11020 true, 11021 &data->link[link_id].conn, 11022 sdata->u.mgd.userspace_selectors); 11023 if (err) 11024 goto err_free; 11025 } 11026 } 11027 11028 /* link removal is done before the ML reconfiguration frame exchange so 11029 * that these links will not be used between their removal by the AP MLD 11030 * and before the station got the ML reconfiguration response. Based on 11031 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 11032 * link removal request. 11033 */ 11034 if (req->rem_links) { 11035 u16 new_active_links = 11036 sdata->vif.active_links & ~req->rem_links; 11037 11038 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 11039 11040 /* Should not be left with no valid links to perform the 11041 * ML reconfiguration 11042 */ 11043 if (!new_valid_links || 11044 !(new_valid_links & ~sdata->vif.dormant_links)) { 11045 sdata_info(sdata, "mlo: reconf: no valid links\n"); 11046 err = -EINVAL; 11047 goto err_free; 11048 } 11049 11050 if (new_active_links != sdata->vif.active_links) { 11051 if (!new_active_links) 11052 new_active_links = 11053 BIT(__ffs(new_valid_links & 11054 ~sdata->vif.dormant_links)); 11055 11056 err = ieee80211_set_active_links(&sdata->vif, 11057 new_active_links); 11058 if (err) { 11059 sdata_info(sdata, 11060 "mlo: reconf: failed set active links\n"); 11061 goto err_free; 11062 } 11063 } 11064 } 11065 11066 /* Build the SKB before the link removal as the construction of the 11067 * station info for removed links requires the local address. 11068 * Invalidate the removed links, so that the transmission of the ML 11069 * reconfiguration request frame would not be done using them, as the AP 11070 * is expected to send the ML reconfiguration response frame on the link 11071 * on which the request was received. 11072 */ 11073 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 11074 cpu_to_le16(req->ext_mld_capa_ops)); 11075 if (!skb) { 11076 err = -ENOMEM; 11077 goto err_free; 11078 } 11079 11080 if (req->rem_links) { 11081 u16 new_dormant_links = 11082 sdata->vif.dormant_links & ~req->rem_links; 11083 11084 err = ieee80211_vif_set_links(sdata, new_valid_links, 11085 new_dormant_links); 11086 if (err) { 11087 sdata_info(sdata, 11088 "mlo: reconf: failed set valid links\n"); 11089 kfree_skb(skb); 11090 goto err_free; 11091 } 11092 11093 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11094 link_id++) { 11095 if (!(req->rem_links & BIT(link_id))) 11096 continue; 11097 11098 ieee80211_sta_remove_link(sta, link_id); 11099 } 11100 11101 /* notify the driver and upper layers */ 11102 ieee80211_vif_cfg_change_notify(sdata, 11103 BSS_CHANGED_MLD_VALID_LINKS); 11104 cfg80211_links_removed(sdata->dev, req->rem_links); 11105 } 11106 11107 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 11108 added_links, req->rem_links); 11109 11110 ieee80211_tx_skb(sdata, skb); 11111 11112 sdata->u.mgd.reconf.added_links = added_links; 11113 sdata->u.mgd.reconf.add_links_data = data; 11114 sdata->u.mgd.reconf.removed_links = req->rem_links; 11115 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 11116 &sdata->u.mgd.reconf.wk, 11117 IEEE80211_ASSOC_TIMEOUT_SHORT); 11118 return 0; 11119 11120 err_free: 11121 kfree(data); 11122 return err; 11123 } 11124 11125 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 11126 { 11127 unsigned long valid_links = sdata->vif.valid_links; 11128 u8 link_id; 11129 11130 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11131 11132 if (!ieee80211_vif_is_mld(&sdata->vif)) 11133 return false; 11134 11135 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 11136 struct ieee80211_bss_conf *bss_conf = 11137 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 11138 11139 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 11140 return false; 11141 } 11142 11143 return true; 11144 } 11145 11146 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 11147 { 11148 int frame_len = IEEE80211_MIN_ACTION_SIZE(epcs) + (enable ? 1 : 0); 11149 struct ieee80211_local *local = sdata->local; 11150 struct ieee80211_mgmt *mgmt; 11151 struct sk_buff *skb; 11152 11153 if (!ieee80211_mgd_epcs_supp(sdata)) 11154 return -EINVAL; 11155 11156 if (sdata->u.mgd.epcs.enabled == enable && 11157 !sdata->u.mgd.epcs.dialog_token) 11158 return 0; 11159 11160 /* Do not allow enabling EPCS if the AP didn't respond yet. 11161 * However, allow disabling EPCS in such a case. 11162 */ 11163 if (sdata->u.mgd.epcs.dialog_token && enable) 11164 return -EALREADY; 11165 11166 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 11167 if (!skb) 11168 return -ENOBUFS; 11169 11170 skb_reserve(skb, local->hw.extra_tx_headroom); 11171 mgmt = skb_put_zero(skb, frame_len); 11172 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 11173 IEEE80211_STYPE_ACTION); 11174 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 11175 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 11176 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 11177 11178 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 11179 if (enable) { 11180 u8 *pos = mgmt->u.action.epcs.variable; 11181 11182 mgmt->u.action.action_code = 11183 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 11184 11185 *pos = ++sdata->u.mgd.dialog_token_alloc; 11186 sdata->u.mgd.epcs.dialog_token = *pos; 11187 } else { 11188 mgmt->u.action.action_code = 11189 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 11190 11191 ieee80211_epcs_teardown(sdata); 11192 ieee80211_epcs_changed(sdata, false); 11193 } 11194 11195 ieee80211_tx_skb(sdata, skb); 11196 return 0; 11197 } 11198 11199 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 11200 struct ieee802_11_elems *elems) 11201 { 11202 const struct element *sub; 11203 size_t scratch_len = elems->ml_epcs_len; 11204 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 11205 11206 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11207 11208 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 11209 return; 11210 11211 if (WARN_ON(!scratch)) 11212 return; 11213 11214 /* Directly parse the sub elements as the common information doesn't 11215 * hold any useful information. 11216 */ 11217 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 11218 elems->ml_epcs_len) { 11219 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 11220 struct ieee80211_link_data *link; 11221 u8 *pos = (void *)sub->data; 11222 u16 control; 11223 ssize_t len; 11224 u8 link_id; 11225 11226 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 11227 continue; 11228 11229 if (sub->datalen < sizeof(control)) 11230 break; 11231 11232 control = get_unaligned_le16(pos); 11233 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 11234 11235 link = sdata_dereference(sdata->link[link_id], sdata); 11236 if (!link) 11237 continue; 11238 11239 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 11240 elems->ml_epcs_len, 11241 scratch, scratch_len, 11242 IEEE80211_MLE_SUBELEM_FRAGMENT); 11243 if (len < (ssize_t)sizeof(control)) 11244 continue; 11245 11246 pos = scratch + sizeof(control); 11247 len -= sizeof(control); 11248 11249 link_elems = ieee802_11_parse_elems(pos, len, 11250 IEEE80211_FTYPE_MGMT | 11251 IEEE80211_STYPE_ACTION, 11252 NULL); 11253 if (!link_elems) 11254 continue; 11255 11256 if (ieee80211_sta_wmm_params(sdata->local, link, 11257 link_elems->wmm_param, 11258 link_elems->wmm_param_len, 11259 link_elems->mu_edca_param_set)) 11260 ieee80211_link_info_change_notify(sdata, link, 11261 BSS_CHANGED_QOS); 11262 } 11263 } 11264 11265 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11266 struct ieee80211_mgmt *mgmt, size_t len) 11267 { 11268 struct ieee802_11_elems *elems __free(kfree) = NULL; 11269 size_t ies_len; 11270 u16 status_code; 11271 u8 *pos, dialog_token; 11272 11273 if (!ieee80211_mgd_epcs_supp(sdata)) 11274 return; 11275 11276 /* Handle dialog token and status code */ 11277 pos = mgmt->u.action.epcs.variable; 11278 dialog_token = *pos; 11279 status_code = get_unaligned_le16(pos + 1); 11280 11281 /* An EPCS enable response with dialog token == 0 is an unsolicited 11282 * notification from the AP MLD. In such a case, EPCS should already be 11283 * enabled and status must be success 11284 */ 11285 if (!dialog_token && 11286 (!sdata->u.mgd.epcs.enabled || 11287 status_code != WLAN_STATUS_SUCCESS)) 11288 return; 11289 11290 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11291 return; 11292 11293 sdata->u.mgd.epcs.dialog_token = 0; 11294 11295 if (status_code != WLAN_STATUS_SUCCESS) 11296 return; 11297 11298 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11299 ies_len = len - IEEE80211_MIN_ACTION_SIZE(epcs) - 11300 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11301 11302 elems = ieee802_11_parse_elems(pos, ies_len, 11303 IEEE80211_FTYPE_MGMT | 11304 IEEE80211_STYPE_ACTION, 11305 NULL); 11306 if (!elems) 11307 return; 11308 11309 ieee80211_ml_epcs(sdata, elems); 11310 ieee80211_epcs_changed(sdata, true); 11311 } 11312 11313 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11314 struct ieee80211_mgmt *mgmt, size_t len) 11315 { 11316 if (!ieee80211_vif_is_mld(&sdata->vif) || 11317 !sdata->u.mgd.epcs.enabled) 11318 return; 11319 11320 ieee80211_epcs_teardown(sdata); 11321 ieee80211_epcs_changed(sdata, false); 11322 } 11323