FILE
mlme.c
File preview with syntax highlighting.
linux-6.19.14/net/mac80211/mlme.c
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 53static int max_nullfunc_tries = 2; 54module_param(max_nullfunc_tries, int, 0644); 55MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58static int max_probe_tries = 5; 59module_param(max_probe_tries, int, 0644); 60MODULE_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 */ 71static int beacon_loss_count = 7; 72module_param(beacon_loss_count, int, 0644); 73MODULE_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 */ 86static int probe_wait_ms = 500; 87module_param(probe_wait_ms, int, 0644); 88MODULE_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 */ 108static 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 118void 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 130void 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 147static int ecw2cw(int ecw) 148{ 149 return (1 << ecw) - 1; 150} 151 152static enum ieee80211_conn_mode 153ieee80211_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 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 172 ignore_ht_channel_mismatch = false; 173 174 *chandef = (struct cfg80211_chan_def) { 175 .chan = channel, 176 .width = NL80211_CHAN_WIDTH_20_NOHT, 177 .center_freq1 = channel->center_freq, 178 .freq1_offset = channel->freq_offset, 179 }; 180 181 /* get special S1G case out of the way */ 182 if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 184 chandef)) { 185 /* Fallback to default 1MHz */ 186 chandef->width = NL80211_CHAN_WIDTH_1; 187 chandef->s1g_primary_2mhz = false; 188 } 189 190 return IEEE80211_CONN_MODE_S1G; 191 } 192 193 /* get special 6 GHz case out of the way */ 194 if (sband->band == NL80211_BAND_6GHZ) { 195 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 196 197 /* this is an error */ 198 if (conn->mode < IEEE80211_CONN_MODE_HE) 199 return IEEE80211_CONN_MODE_LEGACY; 200 201 if (!elems->he_6ghz_capa || !elems->he_cap) { 202 sdata_info(sdata, 203 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 204 return IEEE80211_CONN_MODE_LEGACY; 205 } 206 207 if (!eht_oper || !elems->eht_cap) { 208 eht_oper = NULL; 209 mode = IEEE80211_CONN_MODE_HE; 210 } 211 212 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 213 eht_oper, chandef)) { 214 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 215 return IEEE80211_CONN_MODE_LEGACY; 216 } 217 218 return mode; 219 } 220 221 /* now we have the progression HT, VHT, ... */ 222 if (conn->mode < IEEE80211_CONN_MODE_HT) 223 return IEEE80211_CONN_MODE_LEGACY; 224 225 if (!ht_oper || !elems->ht_cap_elem) 226 return IEEE80211_CONN_MODE_LEGACY; 227 228 chandef->width = NL80211_CHAN_WIDTH_20; 229 230 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 231 channel->band); 232 /* check that channel matches the right operating channel */ 233 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 234 /* 235 * It's possible that some APs are confused here; 236 * Netgear WNDR3700 sometimes reports 4 higher than 237 * the actual channel in association responses, but 238 * since we look at probe response/beacon data here 239 * it should be OK. 240 */ 241 sdata_info(sdata, 242 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 243 channel->center_freq, ht_cfreq, 244 ht_oper->primary_chan, channel->band); 245 return IEEE80211_CONN_MODE_LEGACY; 246 } 247 248 ieee80211_chandef_ht_oper(ht_oper, chandef); 249 250 if (conn->mode < IEEE80211_CONN_MODE_VHT) 251 return IEEE80211_CONN_MODE_HT; 252 253 vht_chandef = *chandef; 254 255 /* 256 * having he_cap/he_oper parsed out implies we're at 257 * least operating as HE STA 258 */ 259 if (elems->he_cap && he_oper && 260 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 261 struct ieee80211_vht_operation he_oper_vht_cap; 262 263 /* 264 * Set only first 3 bytes (other 2 aren't used in 265 * ieee80211_chandef_vht_oper() anyway) 266 */ 267 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 268 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 269 270 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 271 &he_oper_vht_cap, ht_oper, 272 &vht_chandef)) { 273 sdata_info(sdata, 274 "HE AP VHT information is invalid, disabling HE\n"); 275 /* this will cause us to re-parse as VHT STA */ 276 return IEEE80211_CONN_MODE_VHT; 277 } 278 } else if (!vht_oper || !elems->vht_cap_elem) { 279 if (sband->band == NL80211_BAND_5GHZ) 280 return IEEE80211_CONN_MODE_HT; 281 no_vht = true; 282 } else if (sband->band == NL80211_BAND_2GHZ) { 283 no_vht = true; 284 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 285 vht_cap_info, 286 vht_oper, ht_oper, 287 &vht_chandef)) { 288 sdata_info(sdata, 289 "AP VHT information is invalid, disabling VHT\n"); 290 return IEEE80211_CONN_MODE_HT; 291 } 292 293 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 294 sdata_info(sdata, 295 "AP VHT information doesn't match HT, disabling VHT\n"); 296 return IEEE80211_CONN_MODE_HT; 297 } 298 299 *chandef = vht_chandef; 300 301 /* stick to current max mode if we or the AP don't have HE */ 302 if (conn->mode < IEEE80211_CONN_MODE_HE || 303 !elems->he_operation || !elems->he_cap) { 304 if (no_vht) 305 return IEEE80211_CONN_MODE_HT; 306 return IEEE80211_CONN_MODE_VHT; 307 } 308 309 /* stick to HE if we or the AP don't have EHT */ 310 if (conn->mode < IEEE80211_CONN_MODE_EHT || 311 !eht_oper || !elems->eht_cap) 312 return IEEE80211_CONN_MODE_HE; 313 314 /* 315 * handle the case that the EHT operation indicates that it holds EHT 316 * operation information (in case that the channel width differs from 317 * the channel width reported in HT/VHT/HE). 318 */ 319 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 320 struct cfg80211_chan_def eht_chandef = *chandef; 321 322 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 323 &eht_chandef); 324 325 eht_chandef.punctured = 326 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 327 328 if (!cfg80211_chandef_valid(&eht_chandef)) { 329 sdata_info(sdata, 330 "AP EHT information is invalid, disabling EHT\n"); 331 return IEEE80211_CONN_MODE_HE; 332 } 333 334 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 335 sdata_info(sdata, 336 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 337 return IEEE80211_CONN_MODE_HE; 338 } 339 340 *chandef = eht_chandef; 341 } 342 343 return IEEE80211_CONN_MODE_EHT; 344} 345 346static bool 347ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 348 struct ieee80211_supported_band *sband, 349 const struct ieee80211_ht_operation *ht_op) 350{ 351 struct ieee80211_sta_ht_cap sta_ht_cap; 352 int i; 353 354 if (sband->band == NL80211_BAND_6GHZ) 355 return true; 356 357 if (!ht_op) 358 return false; 359 360 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 361 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 362 363 /* 364 * P802.11REVme/D7.0 - 6.5.4.2.4 365 * ... 366 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 367 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 368 * in the HT Operation parameter that contains any unsupported MCSs, 369 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 370 * contain a ResultCode parameter that is not set to the value SUCCESS. 371 * ... 372 */ 373 374 /* Simply check that all basic rates are in the STA RX mask */ 375 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 376 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 377 ht_op->basic_set[i]) 378 return false; 379 } 380 381 return true; 382} 383 384static bool 385ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 386 int link_id, 387 struct ieee80211_supported_band *sband, 388 const struct ieee80211_vht_operation *vht_op) 389{ 390 struct ieee80211_sta_vht_cap sta_vht_cap; 391 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 392 int nss; 393 394 if (sband->band != NL80211_BAND_5GHZ) 395 return true; 396 397 if (!vht_op) 398 return false; 399 400 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 401 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 402 403 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 404 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 405 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 406 407 /* 408 * Many APs are incorrectly advertising an all-zero value here, 409 * which really means MCS 0-7 are required for 1-8 streams, but 410 * they don't really mean it that way. 411 * Some other APs are incorrectly advertising 3 spatial streams 412 * with MCS 0-7 are required, but don't really mean it that way 413 * and we'll connect only with HT, rather than even HE. 414 * As a result, unfortunately the VHT basic MCS/NSS set cannot 415 * be used at all, so check it only in strict mode. 416 */ 417 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 418 return true; 419 420 /* 421 * P802.11REVme/D7.0 - 6.5.4.2.4 422 * ... 423 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 424 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 425 * field in the VHT Operation parameter that contains any unsupported 426 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 427 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 428 * that is not set to the value SUCCESS. 429 * ... 430 */ 431 for (nss = 8; nss > 0; nss--) { 432 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 433 u8 sta_rx_val; 434 u8 sta_tx_val; 435 436 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 437 continue; 438 439 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 440 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 441 442 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 443 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 444 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 445 link_id_info(sdata, link_id, 446 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 447 nss, sta_rx_val, sta_tx_val, ap_op_val); 448 return false; 449 } 450 } 451 452 return true; 453} 454 455static bool 456ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 457 int link_id, 458 const struct ieee80211_he_cap_elem *he_cap, 459 const struct ieee80211_he_operation *he_op) 460{ 461 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 462 u16 mcs_80_map_tx, mcs_80_map_rx; 463 u16 ap_min_req_set; 464 int nss; 465 466 if (!he_cap) 467 return false; 468 469 /* mcs_nss is right after he_cap info */ 470 he_mcs_nss_supp = (void *)(he_cap + 1); 471 472 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 473 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 474 475 /* P802.11-REVme/D0.3 476 * 27.1.1 Introduction to the HE PHY 477 * ... 478 * An HE STA shall support the following features: 479 * ... 480 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 481 * supported channel widths for HE SU PPDUs 482 */ 483 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 484 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 485 link_id_info(sdata, link_id, 486 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 487 mcs_80_map_tx, mcs_80_map_rx); 488 return false; 489 } 490 491 if (!he_op) 492 return true; 493 494 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 495 496 /* 497 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 498 * zeroes, which is nonsense, and completely inconsistent with itself 499 * (it doesn't have 8 streams). Accept the settings in this case anyway. 500 */ 501 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 502 return true; 503 504 /* make sure the AP is consistent with itself 505 * 506 * P802.11-REVme/D0.3 507 * 26.17.1 Basic HE BSS operation 508 * 509 * A STA that is operating in an HE BSS shall be able to receive and 510 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 511 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 512 * MLME-START.request primitive and shall be able to receive at each of 513 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 514 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 515 * primitive 516 */ 517 for (nss = 8; nss > 0; nss--) { 518 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 519 u8 ap_rx_val; 520 u8 ap_tx_val; 521 522 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 523 continue; 524 525 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 526 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 527 528 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 529 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 530 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 531 link_id_info(sdata, link_id, 532 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 533 nss, ap_rx_val, ap_tx_val, ap_op_val); 534 return false; 535 } 536 } 537 538 return true; 539} 540 541static bool 542ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 543 struct ieee80211_supported_band *sband, 544 const struct ieee80211_he_operation *he_op) 545{ 546 const struct ieee80211_sta_he_cap *sta_he_cap = 547 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 548 u16 ap_min_req_set; 549 int i; 550 551 if (!sta_he_cap || !he_op) 552 return false; 553 554 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 555 556 /* 557 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 558 * zeroes, which is nonsense, and completely inconsistent with itself 559 * (it doesn't have 8 streams). Accept the settings in this case anyway. 560 */ 561 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 562 return true; 563 564 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 565 for (i = 0; i < 3; i++) { 566 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 567 &sta_he_cap->he_mcs_nss_supp; 568 u16 sta_mcs_map_rx = 569 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 570 u16 sta_mcs_map_tx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 572 u8 nss; 573 bool verified = true; 574 575 /* 576 * For each band there is a maximum of 8 spatial streams 577 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 578 * of 2 bits per NSS (1-8), with the values defined in enum 579 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 580 * capabilities aren't less than the AP's minimum requirements 581 * for this HE BSS per SS. 582 * It is enough to find one such band that meets the reqs. 583 */ 584 for (nss = 8; nss > 0; nss--) { 585 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 586 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 587 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 588 589 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 590 continue; 591 592 /* 593 * Make sure the HE AP doesn't require MCSs that aren't 594 * supported by the client as required by spec 595 * 596 * P802.11-REVme/D0.3 597 * 26.17.1 Basic HE BSS operation 598 * 599 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 600 * a BSS, unless it supports (i.e., is able to both transmit and 601 * receive using) all of the <HE-MCS, NSS> tuples in the basic 602 * HE-MCS and NSS set. 603 */ 604 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 605 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 606 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 607 verified = false; 608 break; 609 } 610 } 611 612 if (verified) 613 return true; 614 } 615 616 /* If here, STA doesn't meet AP's HE min requirements */ 617 return false; 618} 619 620static u8 621ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 622 const struct ieee80211_sta_eht_cap *sta_eht_cap, 623 unsigned int idx, int bw) 624{ 625 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 626 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 627 628 /* handle us being a 20 MHz-only EHT STA - with four values 629 * for MCS 0-7, 8-9, 10-11, 12-13. 630 */ 631 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 632 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 633 634 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 635 if (idx > 0) 636 idx--; 637 638 switch (bw) { 639 case 0: 640 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 641 case 1: 642 if (!(he_phy_cap0 & 643 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 644 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 645 return 0xff; /* pass check */ 646 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 647 case 2: 648 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 649 return 0xff; /* pass check */ 650 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 651 } 652 653 WARN_ON(1); 654 return 0; 655} 656 657static bool 658ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 659 struct ieee80211_supported_band *sband, 660 const struct ieee80211_eht_operation *eht_op) 661{ 662 const struct ieee80211_sta_he_cap *sta_he_cap = 663 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 664 const struct ieee80211_sta_eht_cap *sta_eht_cap = 665 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 667 unsigned int i; 668 669 if (!sta_he_cap || !sta_eht_cap || !eht_op) 670 return false; 671 672 req = &eht_op->basic_mcs_nss; 673 674 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 675 u8 req_rx_nss, req_tx_nss; 676 unsigned int bw; 677 678 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 679 IEEE80211_EHT_MCS_NSS_RX); 680 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_TX); 682 683 for (bw = 0; bw < 3; bw++) { 684 u8 have, have_rx_nss, have_tx_nss; 685 686 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 687 sta_eht_cap, 688 i, bw); 689 have_rx_nss = u8_get_bits(have, 690 IEEE80211_EHT_MCS_NSS_RX); 691 have_tx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_TX); 693 694 if (req_rx_nss > have_rx_nss || 695 req_tx_nss > have_tx_nss) 696 return false; 697 } 698 } 699 700 return true; 701} 702 703static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 704 const u8 *supp_rates, 705 unsigned int supp_rates_len, 706 const u8 *ext_supp_rates, 707 unsigned int ext_supp_rates_len, 708 u32 *rates, u32 *basic_rates, 709 unsigned long *unknown_rates_selectors, 710 bool *have_higher_than_11mbit, 711 int *min_rate, int *min_rate_index) 712{ 713 int i, j; 714 715 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 716 u8 supp_rate = i < supp_rates_len ? 717 supp_rates[i] : 718 ext_supp_rates[i - supp_rates_len]; 719 int rate = supp_rate & 0x7f; 720 bool is_basic = !!(supp_rate & 0x80); 721 722 if ((rate * 5) > 110 && have_higher_than_11mbit) 723 *have_higher_than_11mbit = true; 724 725 /* 726 * Skip membership selectors since they're not rates. 727 * 728 * Note: Even though the membership selector and the basic 729 * rate flag share the same bit, they are not exactly 730 * the same. 731 */ 732 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 733 if (unknown_rates_selectors) 734 set_bit(rate, unknown_rates_selectors); 735 continue; 736 } 737 738 for (j = 0; j < sband->n_bitrates; j++) { 739 struct ieee80211_rate *br; 740 int brate; 741 742 br = &sband->bitrates[j]; 743 744 brate = DIV_ROUND_UP(br->bitrate, 5); 745 if (brate == rate) { 746 if (rates) 747 *rates |= BIT(j); 748 if (is_basic && basic_rates) 749 *basic_rates |= BIT(j); 750 if (min_rate && (rate * 5) < *min_rate) { 751 *min_rate = rate * 5; 752 if (min_rate_index) 753 *min_rate_index = j; 754 } 755 break; 756 } 757 } 758 759 /* Handle an unknown entry as if it is an unknown selector */ 760 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 761 set_bit(rate, unknown_rates_selectors); 762 } 763} 764 765static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 766 const struct cfg80211_chan_def *chandef, 767 u32 prohibited_flags) 768{ 769 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 770 chandef, prohibited_flags)) 771 return false; 772 773 if (chandef->punctured && 774 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 775 return false; 776 777 return true; 778} 779 780static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 781{ 782 if (c->width == NL80211_CHAN_WIDTH_80P80) 783 return 4 + 4; 784 785 return cfg80211_chandef_get_width(c) / 20; 786} 787 788static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 789{ 790 switch (c->width) { 791 case NL80211_CHAN_WIDTH_20: 792 case NL80211_CHAN_WIDTH_20_NOHT: 793 return 1; 794 case NL80211_CHAN_WIDTH_40: 795 return 2; 796 case NL80211_CHAN_WIDTH_80P80: 797 case NL80211_CHAN_WIDTH_80: 798 return 3; 799 case NL80211_CHAN_WIDTH_160: 800 return 4; 801 case NL80211_CHAN_WIDTH_320: 802 return 5; 803 default: 804 WARN_ON(1); 805 return 0; 806 } 807} 808 809VISIBLE_IF_MAC80211_KUNIT int 810ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 811 u8 n_partial_subchans) 812{ 813 int n = ieee80211_chandef_num_subchans(ap); 814 struct cfg80211_chan_def tmp = *ap; 815 int offset = 0; 816 817 /* 818 * Given a chandef (in this context, it's the AP's) and a number 819 * of subchannels that we want to look at ('n_partial_subchans'), 820 * calculate the offset in number of subchannels between the full 821 * and the subset with the desired width. 822 */ 823 824 /* same number of subchannels means no offset, obviously */ 825 if (n == n_partial_subchans) 826 return 0; 827 828 /* don't WARN - misconfigured APs could cause this if their N > width */ 829 if (n < n_partial_subchans) 830 return 0; 831 832 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 833 u32 prev = tmp.center_freq1; 834 835 ieee80211_chandef_downgrade(&tmp, NULL); 836 837 /* 838 * if center_freq moved up, half the original channels 839 * are gone now but were below, so increase offset 840 */ 841 if (prev < tmp.center_freq1) 842 offset += ieee80211_chandef_num_subchans(&tmp); 843 } 844 845 /* 846 * 80+80 with secondary 80 below primary - four subchannels for it 847 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 848 */ 849 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 850 ap->center_freq2 < ap->center_freq1) 851 offset += 4; 852 853 return offset; 854} 855EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 856 857VISIBLE_IF_MAC80211_KUNIT void 858ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 859 const struct cfg80211_chan_def *ap, 860 const struct cfg80211_chan_def *used) 861{ 862 u8 needed = ieee80211_chandef_num_subchans(used); 863 u8 have = ieee80211_chandef_num_subchans(ap); 864 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 865 u8 offset; 866 867 if (!psd->valid) 868 return; 869 870 /* if N is zero, all defaults were used, no point in rearranging */ 871 if (!psd->n) 872 goto out; 873 874 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 875 876 /* 877 * This assumes that 'N' is consistent with the HE channel, as 878 * it should be (otherwise the AP is broken). 879 * 880 * In psd->power we have values in the order 0..N, 0..K, where 881 * N+K should cover the entire channel per 'ap', but even if it 882 * doesn't then we've pre-filled 'unlimited' as defaults. 883 * 884 * But this is all the wrong order, we want to have them in the 885 * order of the 'used' channel. 886 * 887 * So for example, we could have a 320 MHz EHT AP, which has the 888 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 889 * seem to be considered for the TPE), as follows: 890 * 891 * EHT 320: | | | | | | | | | | | | | | | | | 892 * HE 80: | | | | | 893 * used 160: | | | | | | | | | 894 * 895 * N entries: |--|--|--|--| 896 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 897 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 898 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 899 * used chan: 0 1 2 3 4 5 6 7 900 * 901 * The idx in the power array ('power idx') is like this since it 902 * comes directly from the element's N and K entries in their 903 * element order, and those are this way for HE compatibility. 904 * 905 * Rearrange them as desired here, first by putting them into the 906 * 'full chan' order, and then selecting the necessary subset for 907 * the 'used chan'. 908 */ 909 910 /* first reorder according to AP channel */ 911 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 912 for (int i = 0; i < have; i++) { 913 if (i < offset) 914 tmp[i] = psd->power[i + psd->n]; 915 else if (i < offset + psd->n) 916 tmp[i] = psd->power[i - offset]; 917 else 918 tmp[i] = psd->power[i]; 919 } 920 921 /* 922 * and then select the subset for the used channel 923 * (set everything to defaults first in case a driver is confused) 924 */ 925 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 926 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 927 for (int i = 0; i < needed; i++) 928 psd->power[i] = tmp[offset + i]; 929 930out: 931 /* limit, but don't lie if there are defaults in the data */ 932 if (needed < psd->count) 933 psd->count = needed; 934} 935EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 936 937static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 938 const struct cfg80211_chan_def *ap, 939 const struct cfg80211_chan_def *used) 940{ 941 /* ignore this completely for narrow/invalid channels */ 942 if (!ieee80211_chandef_num_subchans(ap) || 943 !ieee80211_chandef_num_subchans(used)) { 944 ieee80211_clear_tpe(tpe); 945 return; 946 } 947 948 for (int i = 0; i < 2; i++) { 949 int needed_pwr_count; 950 951 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 952 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 953 954 /* limit this to the widths we actually need */ 955 needed_pwr_count = ieee80211_chandef_num_widths(used); 956 if (needed_pwr_count < tpe->max_local[i].count) 957 tpe->max_local[i].count = needed_pwr_count; 958 if (needed_pwr_count < tpe->max_reg_client[i].count) 959 tpe->max_reg_client[i].count = needed_pwr_count; 960 } 961} 962 963/* 964 * The AP part of the channel request is used to distinguish settings 965 * to the device used for wider bandwidth OFDMA. This is used in the 966 * channel context code to assign two channel contexts even if they're 967 * both for the same channel, if the AP bandwidths are incompatible. 968 * If not EHT (or driver override) then ap.chan == NULL indicates that 969 * there's no wider BW OFDMA used. 970 */ 971static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 972 struct ieee80211_chan_req *chanreq, 973 struct ieee80211_conn_settings *conn, 974 struct cfg80211_chan_def *ap_chandef) 975{ 976 chanreq->ap.chan = NULL; 977 978 if (conn->mode < IEEE80211_CONN_MODE_EHT) 979 return; 980 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 981 return; 982 983 chanreq->ap = *ap_chandef; 984} 985 986VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 987ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 988 struct ieee80211_conn_settings *conn, 989 struct cfg80211_bss *cbss, int link_id, 990 struct ieee80211_chan_req *chanreq, 991 struct cfg80211_chan_def *ap_chandef, 992 unsigned long *userspace_selectors) 993{ 994 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 995 struct ieee80211_bss *bss = (void *)cbss->priv; 996 struct ieee80211_channel *channel = cbss->channel; 997 struct ieee80211_elems_parse_params parse_params = { 998 .link_id = -1, 999 .from_ap = true, 1000 .start = ies->data, 1001 .len = ies->len, 1002 .type = ies->from_beacon ? 1003 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1004 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1005 }; 1006 struct ieee802_11_elems *elems; 1007 struct ieee80211_supported_band *sband; 1008 enum ieee80211_conn_mode ap_mode; 1009 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1010 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1011 int ret; 1012 1013again: 1014 parse_params.mode = conn->mode; 1015 elems = ieee802_11_parse_elems_full(&parse_params); 1016 if (!elems) 1017 return ERR_PTR(-ENOMEM); 1018 1019 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1020 elems, false, conn, ap_chandef); 1021 1022 /* this should be impossible since parsing depends on our mode */ 1023 if (WARN_ON(ap_mode > conn->mode)) { 1024 ret = -EINVAL; 1025 goto free; 1026 } 1027 1028 if (conn->mode != ap_mode) { 1029 conn->mode = ap_mode; 1030 kfree(elems); 1031 goto again; 1032 } 1033 1034 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1035 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1036 1037 sband = sdata->local->hw.wiphy->bands[channel->band]; 1038 1039 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1040 elems->ext_supp_rates, elems->ext_supp_rates_len, 1041 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1042 NULL); 1043 1044 switch (channel->band) { 1045 case NL80211_BAND_S1GHZ: 1046 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1047 ret = -EINVAL; 1048 goto free; 1049 } 1050 1051 chanreq->oper = *ap_chandef; 1052 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1053 IEEE80211_CHAN_DISABLED)) { 1054 ret = -EINVAL; 1055 goto free; 1056 } 1057 1058 return elems; 1059 case NL80211_BAND_6GHZ: 1060 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1061 link_id_info(sdata, link_id, 1062 "Rejecting non-HE 6/7 GHz connection"); 1063 ret = -EINVAL; 1064 goto free; 1065 } 1066 break; 1067 default: 1068 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1069 ret = -EINVAL; 1070 goto free; 1071 } 1072 } 1073 1074 switch (ap_mode) { 1075 case IEEE80211_CONN_MODE_S1G: 1076 WARN_ON(1); 1077 ret = -EINVAL; 1078 goto free; 1079 case IEEE80211_CONN_MODE_LEGACY: 1080 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1081 break; 1082 case IEEE80211_CONN_MODE_HT: 1083 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1084 conn->bw_limit, 1085 IEEE80211_CONN_BW_LIMIT_40); 1086 break; 1087 case IEEE80211_CONN_MODE_VHT: 1088 case IEEE80211_CONN_MODE_HE: 1089 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1090 conn->bw_limit, 1091 IEEE80211_CONN_BW_LIMIT_160); 1092 break; 1093 case IEEE80211_CONN_MODE_EHT: 1094 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1095 conn->bw_limit, 1096 IEEE80211_CONN_BW_LIMIT_320); 1097 break; 1098 } 1099 1100 chanreq->oper = *ap_chandef; 1101 1102 bitmap_copy(sta_selectors, userspace_selectors, 128); 1103 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1104 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1105 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1106 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1107 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1108 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1109 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1110 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1111 1112 /* 1113 * We do not support EPD or GLK so never add them. 1114 * SAE_H2E is handled through userspace_selectors. 1115 */ 1116 1117 /* Check if we support all required features */ 1118 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1119 link_id_info(sdata, link_id, 1120 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1121 ret = -EINVAL; 1122 goto free; 1123 } 1124 1125 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1126 1127 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1128 IEEE80211_CHAN_DISABLED)) { 1129 if (chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT) { 1130 link_id_info(sdata, link_id, 1131 "unusable channel (%d MHz) for connection\n", 1132 chanreq->oper.chan->center_freq); 1133 ret = -EINVAL; 1134 goto free; 1135 } 1136 1137 ieee80211_chanreq_downgrade(chanreq, conn); 1138 } 1139 1140 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1141 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1142 IEEE80211_CHAN_NO_HE)) { 1143 conn->mode = IEEE80211_CONN_MODE_VHT; 1144 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1145 conn->bw_limit, 1146 IEEE80211_CONN_BW_LIMIT_160); 1147 } 1148 1149 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1150 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1151 IEEE80211_CHAN_NO_EHT)) { 1152 conn->mode = IEEE80211_CONN_MODE_HE; 1153 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1154 conn->bw_limit, 1155 IEEE80211_CONN_BW_LIMIT_160); 1156 } 1157 1158 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1159 link_id_info(sdata, link_id, 1160 "regulatory prevented using AP config, downgraded\n"); 1161 1162 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1163 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1164 elems->ht_operation)) { 1165 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1166 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1167 link_id_info(sdata, link_id, 1168 "required MCSes not supported, disabling HT\n"); 1169 } 1170 1171 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1172 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1173 elems->vht_operation)) { 1174 conn->mode = IEEE80211_CONN_MODE_HT; 1175 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1176 conn->bw_limit, 1177 IEEE80211_CONN_BW_LIMIT_40); 1178 link_id_info(sdata, link_id, 1179 "required MCSes not supported, disabling VHT\n"); 1180 } 1181 1182 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1183 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1184 (void *)elems->he_cap, 1185 elems->he_operation) || 1186 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1187 elems->he_operation))) { 1188 conn->mode = IEEE80211_CONN_MODE_VHT; 1189 link_id_info(sdata, link_id, 1190 "required MCSes not supported, disabling HE\n"); 1191 } 1192 1193 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1194 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1195 elems->eht_operation)) { 1196 conn->mode = IEEE80211_CONN_MODE_HE; 1197 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1198 conn->bw_limit, 1199 IEEE80211_CONN_BW_LIMIT_160); 1200 link_id_info(sdata, link_id, 1201 "required MCSes not supported, disabling EHT\n"); 1202 } 1203 1204 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1205 channel->band != NL80211_BAND_2GHZ && 1206 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1207 conn->mode = IEEE80211_CONN_MODE_HE; 1208 link_id_info(sdata, link_id, 1209 "required bandwidth not supported, disabling EHT\n"); 1210 } 1211 1212 /* the mode can only decrease, so this must terminate */ 1213 if (ap_mode != conn->mode) { 1214 kfree(elems); 1215 goto again; 1216 } 1217 1218 mlme_link_id_dbg(sdata, link_id, 1219 "connecting with %s mode, max bandwidth %d MHz\n", 1220 ieee80211_conn_mode_str(conn->mode), 1221 20 * (1 << conn->bw_limit)); 1222 1223 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1224 ret = -EINVAL; 1225 goto free; 1226 } 1227 1228 return elems; 1229free: 1230 kfree(elems); 1231 return ERR_PTR(ret); 1232} 1233EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1234 1235static int ieee80211_config_bw(struct ieee80211_link_data *link, 1236 struct ieee802_11_elems *elems, 1237 bool update, u64 *changed, u16 stype) 1238{ 1239 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1240 struct ieee80211_sub_if_data *sdata = link->sdata; 1241 struct ieee80211_chan_req chanreq = {}; 1242 struct cfg80211_chan_def ap_chandef; 1243 enum ieee80211_conn_mode ap_mode; 1244 const char *frame; 1245 u32 vht_cap_info = 0; 1246 u16 ht_opmode; 1247 int ret; 1248 1249 switch (stype) { 1250 case IEEE80211_STYPE_BEACON: 1251 frame = "beacon"; 1252 break; 1253 case IEEE80211_STYPE_ASSOC_RESP: 1254 frame = "assoc response"; 1255 break; 1256 case IEEE80211_STYPE_REASSOC_RESP: 1257 frame = "reassoc response"; 1258 break; 1259 case IEEE80211_STYPE_ACTION: 1260 /* the only action frame that gets here */ 1261 frame = "ML reconf response"; 1262 break; 1263 default: 1264 return -EINVAL; 1265 } 1266 1267 /* don't track any bandwidth changes in legacy/S1G modes */ 1268 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1269 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1270 return 0; 1271 1272 if (elems->vht_cap_elem) 1273 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1274 1275 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1276 elems, true, &link->u.mgd.conn, 1277 &ap_chandef); 1278 1279 if (ap_mode != link->u.mgd.conn.mode) { 1280 link_info(link, 1281 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1282 link->u.mgd.bssid, 1283 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1284 ieee80211_conn_mode_str(ap_mode), frame); 1285 return -EINVAL; 1286 } 1287 1288 chanreq.oper = ap_chandef; 1289 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1290 &ap_chandef); 1291 1292 /* 1293 * if HT operation mode changed store the new one - 1294 * this may be applicable even if channel is identical 1295 */ 1296 if (elems->ht_operation) { 1297 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1298 if (link->conf->ht_operation_mode != ht_opmode) { 1299 *changed |= BSS_CHANGED_HT; 1300 link->conf->ht_operation_mode = ht_opmode; 1301 } 1302 } 1303 1304 /* 1305 * Downgrade the new channel if we associated with restricted 1306 * bandwidth capabilities. For example, if we associated as a 1307 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1308 * or config reasons) then switching to a 40 MHz channel now 1309 * won't do us any good -- we couldn't use it with the AP. 1310 */ 1311 while (link->u.mgd.conn.bw_limit < 1312 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1313 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1314 1315 /* TPE element is not present in (re)assoc/ML reconfig response */ 1316 if (stype == IEEE80211_STYPE_BEACON && 1317 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1318 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1319 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1320 &chanreq.oper); 1321 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1322 link->conf->tpe = elems->tpe; 1323 *changed |= BSS_CHANGED_TPE; 1324 } 1325 } 1326 1327 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1328 return 0; 1329 1330 link_info(link, 1331 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1332 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1333 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1334 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1335 chanreq.oper.center_freq2); 1336 1337 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1338 sdata_info(sdata, 1339 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1340 link->u.mgd.bssid, frame); 1341 return -EINVAL; 1342 } 1343 1344 if (!update) { 1345 link->conf->chanreq = chanreq; 1346 return 0; 1347 } 1348 1349 /* 1350 * We're tracking the current AP here, so don't do any further checks 1351 * here. This keeps us from playing ping-pong with regulatory, without 1352 * it the following can happen (for example): 1353 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1354 * - AP advertises regdom US 1355 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1356 * - we detect an unsupported channel and disconnect 1357 * - disconnect causes CRDA to reload world regdomain and the game 1358 * starts anew. 1359 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1360 * 1361 * It seems possible that there are still scenarios with CSA or real 1362 * bandwidth changes where a this could happen, but those cases are 1363 * less common and wouldn't completely prevent using the AP. 1364 */ 1365 1366 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1367 if (ret) { 1368 sdata_info(sdata, 1369 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1370 link->u.mgd.bssid, frame); 1371 return ret; 1372 } 1373 1374 cfg80211_schedule_channels_check(&sdata->wdev); 1375 return 0; 1376} 1377 1378/* frame sending functions */ 1379 1380static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1381 struct sk_buff *skb, u8 ap_ht_param, 1382 struct ieee80211_supported_band *sband, 1383 struct ieee80211_channel *channel, 1384 enum ieee80211_smps_mode smps, 1385 const struct ieee80211_conn_settings *conn) 1386{ 1387 u8 *pos; 1388 u32 flags = channel->flags; 1389 u16 cap; 1390 struct ieee80211_sta_ht_cap ht_cap; 1391 1392 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1393 1394 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1395 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1396 1397 /* determine capability flags */ 1398 cap = ht_cap.cap; 1399 1400 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1401 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1402 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1403 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1404 cap &= ~IEEE80211_HT_CAP_SGI_40; 1405 } 1406 break; 1407 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1408 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1409 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1410 cap &= ~IEEE80211_HT_CAP_SGI_40; 1411 } 1412 break; 1413 } 1414 1415 /* 1416 * If 40 MHz was disabled associate as though we weren't 1417 * capable of 40 MHz -- some broken APs will never fall 1418 * back to trying to transmit in 20 MHz. 1419 */ 1420 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1421 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1422 cap &= ~IEEE80211_HT_CAP_SGI_40; 1423 } 1424 1425 /* set SM PS mode properly */ 1426 cap &= ~IEEE80211_HT_CAP_SM_PS; 1427 switch (smps) { 1428 case IEEE80211_SMPS_AUTOMATIC: 1429 case IEEE80211_SMPS_NUM_MODES: 1430 WARN_ON(1); 1431 fallthrough; 1432 case IEEE80211_SMPS_OFF: 1433 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1434 IEEE80211_HT_CAP_SM_PS_SHIFT; 1435 break; 1436 case IEEE80211_SMPS_STATIC: 1437 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1438 IEEE80211_HT_CAP_SM_PS_SHIFT; 1439 break; 1440 case IEEE80211_SMPS_DYNAMIC: 1441 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1442 IEEE80211_HT_CAP_SM_PS_SHIFT; 1443 break; 1444 } 1445 1446 /* reserve and fill IE */ 1447 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1448 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1449} 1450 1451/* This function determines vht capability flags for the association 1452 * and builds the IE. 1453 * Note - the function returns true to own the MU-MIMO capability 1454 */ 1455static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1456 struct sk_buff *skb, 1457 struct ieee80211_supported_band *sband, 1458 struct ieee80211_vht_cap *ap_vht_cap, 1459 const struct ieee80211_conn_settings *conn) 1460{ 1461 struct ieee80211_local *local = sdata->local; 1462 u8 *pos; 1463 u32 cap; 1464 struct ieee80211_sta_vht_cap vht_cap; 1465 u32 mask, ap_bf_sts, our_bf_sts; 1466 bool mu_mimo_owner = false; 1467 1468 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1469 1470 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1471 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1472 1473 /* determine capability flags */ 1474 cap = vht_cap.cap; 1475 1476 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1477 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1478 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1479 } 1480 1481 /* 1482 * Some APs apparently get confused if our capabilities are better 1483 * than theirs, so restrict what we advertise in the assoc request. 1484 */ 1485 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1486 if (!(ap_vht_cap->vht_cap_info & 1487 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1488 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1489 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1490 else if (!(ap_vht_cap->vht_cap_info & 1491 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1492 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1493 } 1494 1495 /* 1496 * If some other vif is using the MU-MIMO capability we cannot associate 1497 * using MU-MIMO - this will lead to contradictions in the group-id 1498 * mechanism. 1499 * Ownership is defined since association request, in order to avoid 1500 * simultaneous associations with MU-MIMO. 1501 */ 1502 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1503 bool disable_mu_mimo = false; 1504 struct ieee80211_sub_if_data *other; 1505 1506 list_for_each_entry(other, &local->interfaces, list) { 1507 if (other->vif.bss_conf.mu_mimo_owner) { 1508 disable_mu_mimo = true; 1509 break; 1510 } 1511 } 1512 if (disable_mu_mimo) 1513 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1514 else 1515 mu_mimo_owner = true; 1516 } 1517 1518 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1519 1520 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1521 our_bf_sts = cap & mask; 1522 1523 if (ap_bf_sts < our_bf_sts) { 1524 cap &= ~mask; 1525 cap |= ap_bf_sts; 1526 } 1527 1528 /* reserve and fill IE */ 1529 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1530 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1531 1532 return mu_mimo_owner; 1533} 1534 1535static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1536 struct sk_buff *skb, 1537 enum nl80211_chan_width width, 1538 struct ieee80211_supported_band *sband, 1539 struct ieee80211_mgd_assoc_data *assoc_data) 1540{ 1541 u32 rates; 1542 1543 if (assoc_data->supp_rates_len && 1544 !ieee80211_hw_check(&local->hw, STRICT)) { 1545 /* 1546 * Get all rates supported by the device and the AP as 1547 * some APs don't like getting a superset of their rates 1548 * in the association request (e.g. D-Link DAP 1353 in 1549 * b-only mode)... 1550 */ 1551 ieee80211_parse_bitrates(width, sband, 1552 assoc_data->supp_rates, 1553 assoc_data->supp_rates_len, 1554 &rates); 1555 } else { 1556 /* 1557 * In case AP not provide any supported rates information 1558 * before association, we send information element(s) with 1559 * all rates that we support. 1560 */ 1561 rates = ~0; 1562 } 1563 1564 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1565 WLAN_EID_SUPP_RATES); 1566 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1567 WLAN_EID_EXT_SUPP_RATES); 1568} 1569 1570static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1571 const u8 *elems, 1572 size_t elems_len, 1573 size_t offset) 1574{ 1575 size_t noffset; 1576 1577 static const u8 before_ht[] = { 1578 WLAN_EID_SSID, 1579 WLAN_EID_SUPP_RATES, 1580 WLAN_EID_EXT_SUPP_RATES, 1581 WLAN_EID_PWR_CAPABILITY, 1582 WLAN_EID_SUPPORTED_CHANNELS, 1583 WLAN_EID_RSN, 1584 WLAN_EID_QOS_CAPA, 1585 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1586 WLAN_EID_MOBILITY_DOMAIN, 1587 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1588 WLAN_EID_RIC_DATA, /* reassoc only */ 1589 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1590 }; 1591 static const u8 after_ric[] = { 1592 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1593 WLAN_EID_HT_CAPABILITY, 1594 WLAN_EID_BSS_COEX_2040, 1595 /* luckily this is almost always there */ 1596 WLAN_EID_EXT_CAPABILITY, 1597 WLAN_EID_QOS_TRAFFIC_CAPA, 1598 WLAN_EID_TIM_BCAST_REQ, 1599 WLAN_EID_INTERWORKING, 1600 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1601 WLAN_EID_VHT_CAPABILITY, 1602 WLAN_EID_OPMODE_NOTIF, 1603 }; 1604 1605 if (!elems_len) 1606 return offset; 1607 1608 noffset = ieee80211_ie_split_ric(elems, elems_len, 1609 before_ht, 1610 ARRAY_SIZE(before_ht), 1611 after_ric, 1612 ARRAY_SIZE(after_ric), 1613 offset); 1614 skb_put_data(skb, elems + offset, noffset - offset); 1615 1616 return noffset; 1617} 1618 1619static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1620 const u8 *elems, 1621 size_t elems_len, 1622 size_t offset) 1623{ 1624 static const u8 before_vht[] = { 1625 /* 1626 * no need to list the ones split off before HT 1627 * or generated here 1628 */ 1629 WLAN_EID_BSS_COEX_2040, 1630 WLAN_EID_EXT_CAPABILITY, 1631 WLAN_EID_QOS_TRAFFIC_CAPA, 1632 WLAN_EID_TIM_BCAST_REQ, 1633 WLAN_EID_INTERWORKING, 1634 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1635 }; 1636 size_t noffset; 1637 1638 if (!elems_len) 1639 return offset; 1640 1641 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1642 noffset = ieee80211_ie_split(elems, elems_len, 1643 before_vht, ARRAY_SIZE(before_vht), 1644 offset); 1645 skb_put_data(skb, elems + offset, noffset - offset); 1646 1647 return noffset; 1648} 1649 1650static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1651 const u8 *elems, 1652 size_t elems_len, 1653 size_t offset) 1654{ 1655 static const u8 before_he[] = { 1656 /* 1657 * no need to list the ones split off before VHT 1658 * or generated here 1659 */ 1660 WLAN_EID_OPMODE_NOTIF, 1661 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1662 /* 11ai elements */ 1663 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1664 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1665 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1666 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1667 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1668 /* TODO: add 11ah/11aj/11ak elements */ 1669 }; 1670 size_t noffset; 1671 1672 if (!elems_len) 1673 return offset; 1674 1675 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1676 noffset = ieee80211_ie_split(elems, elems_len, 1677 before_he, ARRAY_SIZE(before_he), 1678 offset); 1679 skb_put_data(skb, elems + offset, noffset - offset); 1680 1681 return noffset; 1682} 1683 1684static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1685 const u8 *elems, size_t elems_len, 1686 size_t offset) 1687{ 1688 static const u8 before_reg_conn[] = { 1689 /* 1690 * no need to list the ones split off before HE 1691 * or generated here 1692 */ 1693 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1694 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1695 }; 1696 size_t noffset; 1697 1698 if (!elems_len) 1699 return offset; 1700 1701 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1702 ARRAY_SIZE(before_reg_conn), offset); 1703 skb_put_data(skb, elems + offset, noffset - offset); 1704 1705 return noffset; 1706} 1707 1708#define PRESENT_ELEMS_MAX 8 1709#define PRESENT_ELEM_EXT_OFFS 0x100 1710 1711static void 1712ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1713 struct sk_buff *skb, u16 capab, 1714 const struct element *ext_capa, 1715 const u16 *present_elems, 1716 struct ieee80211_mgd_assoc_data *assoc_data); 1717 1718static size_t 1719ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1720 struct sk_buff *skb, u16 *capab, 1721 const struct element *ext_capa, 1722 const u8 *extra_elems, 1723 size_t extra_elems_len, 1724 unsigned int link_id, 1725 struct ieee80211_link_data *link, 1726 u16 *present_elems, 1727 struct ieee80211_mgd_assoc_data *assoc_data) 1728{ 1729 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1730 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1731 struct ieee80211_channel *chan = cbss->channel; 1732 const struct ieee80211_sband_iftype_data *iftd; 1733 struct ieee80211_local *local = sdata->local; 1734 struct ieee80211_supported_band *sband; 1735 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1736 struct ieee80211_chanctx_conf *chanctx_conf; 1737 enum ieee80211_smps_mode smps_mode; 1738 u16 orig_capab = *capab; 1739 size_t offset = 0; 1740 int present_elems_len = 0; 1741 u8 *pos; 1742 int i; 1743 1744#define ADD_PRESENT_ELEM(id) do { \ 1745 /* need a last for termination - we use 0 == SSID */ \ 1746 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1747 present_elems[present_elems_len++] = (id); \ 1748} while (0) 1749#define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1750 1751 if (link) 1752 smps_mode = link->smps_mode; 1753 else if (sdata->u.mgd.powersave) 1754 smps_mode = IEEE80211_SMPS_DYNAMIC; 1755 else 1756 smps_mode = IEEE80211_SMPS_OFF; 1757 1758 if (link) { 1759 /* 1760 * 5/10 MHz scenarios are only viable without MLO, in which 1761 * case this pointer should be used ... All of this is a bit 1762 * unclear though, not sure this even works at all. 1763 */ 1764 rcu_read_lock(); 1765 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1766 if (chanctx_conf) 1767 width = chanctx_conf->def.width; 1768 rcu_read_unlock(); 1769 } 1770 1771 sband = local->hw.wiphy->bands[chan->band]; 1772 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1773 1774 if (sband->band == NL80211_BAND_2GHZ) { 1775 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1776 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1777 } 1778 1779 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1780 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1781 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1782 1783 if (sband->band != NL80211_BAND_S1GHZ) 1784 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1785 1786 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1787 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1788 struct cfg80211_chan_def chandef = { 1789 .width = width, 1790 .chan = chan, 1791 }; 1792 1793 pos = skb_put(skb, 4); 1794 *pos++ = WLAN_EID_PWR_CAPABILITY; 1795 *pos++ = 2; 1796 *pos++ = 0; /* min tx power */ 1797 /* max tx power */ 1798 *pos++ = ieee80211_chandef_max_power(&chandef); 1799 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1800 } 1801 1802 /* 1803 * Per spec, we shouldn't include the list of channels if we advertise 1804 * support for extended channel switching, but we've always done that; 1805 * (for now?) apply this restriction only on the (new) 6 GHz band. 1806 */ 1807 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1808 (sband->band != NL80211_BAND_6GHZ || 1809 !ext_capa || ext_capa->datalen < 1 || 1810 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1811 /* TODO: get this in reg domain format */ 1812 pos = skb_put(skb, 2 * sband->n_channels + 2); 1813 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1814 *pos++ = 2 * sband->n_channels; 1815 for (i = 0; i < sband->n_channels; i++) { 1816 int cf = sband->channels[i].center_freq; 1817 1818 *pos++ = ieee80211_frequency_to_channel(cf); 1819 *pos++ = 1; /* one channel in the subband*/ 1820 } 1821 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1822 } 1823 1824 /* if present, add any custom IEs that go before HT */ 1825 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1826 extra_elems_len, 1827 offset); 1828 1829 if (sband->band != NL80211_BAND_6GHZ && 1830 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1831 ieee80211_add_ht_ie(sdata, skb, 1832 assoc_data->link[link_id].ap_ht_param, 1833 sband, chan, smps_mode, 1834 &assoc_data->link[link_id].conn); 1835 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1836 } 1837 1838 /* if present, add any custom IEs that go before VHT */ 1839 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1840 extra_elems_len, 1841 offset); 1842 1843 if (sband->band != NL80211_BAND_6GHZ && 1844 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1845 sband->vht_cap.vht_supported) { 1846 bool mu_mimo_owner = 1847 ieee80211_add_vht_ie(sdata, skb, sband, 1848 &assoc_data->link[link_id].ap_vht_cap, 1849 &assoc_data->link[link_id].conn); 1850 1851 if (link) 1852 link->conf->mu_mimo_owner = mu_mimo_owner; 1853 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1854 } 1855 1856 /* if present, add any custom IEs that go before HE */ 1857 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1858 extra_elems_len, 1859 offset); 1860 1861 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1862 ieee80211_put_he_cap(skb, sdata, sband, 1863 &assoc_data->link[link_id].conn); 1864 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1865 if (sband->band == NL80211_BAND_6GHZ) 1866 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1867 } 1868 1869 /* 1870 * if present, add any custom IEs that go before regulatory 1871 * connectivity element 1872 */ 1873 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1874 extra_elems_len, offset); 1875 1876 if (sband->band == NL80211_BAND_6GHZ) { 1877 /* 1878 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1879 * capable of operating on the 6 GHz band shall transmit 1880 * regulatory connectivity element. 1881 */ 1882 ieee80211_put_reg_conn(skb, chan->flags); 1883 } 1884 1885 /* 1886 * careful - need to know about all the present elems before 1887 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1888 * we're going to put it after the ML element 1889 */ 1890 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1891 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1892 1893 if (link_id == assoc_data->assoc_link_id) 1894 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1895 present_elems, assoc_data); 1896 1897 /* crash if somebody gets it wrong */ 1898 present_elems = NULL; 1899 1900 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1901 ieee80211_put_eht_cap(skb, sdata, sband, 1902 &assoc_data->link[link_id].conn); 1903 1904 if (sband->band == NL80211_BAND_S1GHZ) { 1905 ieee80211_add_aid_request_ie(sdata, skb); 1906 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1907 } 1908 1909 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1910 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1911 1912 return offset; 1913} 1914 1915static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1916 const u16 *outer, 1917 const u16 *inner) 1918{ 1919 unsigned int skb_len = skb->len; 1920 bool at_extension = false; 1921 bool added = false; 1922 int i, j; 1923 u8 *len, *list_len = NULL; 1924 1925 skb_put_u8(skb, WLAN_EID_EXTENSION); 1926 len = skb_put(skb, 1); 1927 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1928 1929 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1930 u16 elem = outer[i]; 1931 bool have_inner = false; 1932 1933 /* should at least be sorted in the sense of normal -> ext */ 1934 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1935 1936 /* switch to extension list */ 1937 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1938 at_extension = true; 1939 if (!list_len) 1940 skb_put_u8(skb, 0); 1941 list_len = NULL; 1942 } 1943 1944 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1945 if (elem == inner[j]) { 1946 have_inner = true; 1947 break; 1948 } 1949 } 1950 1951 if (have_inner) 1952 continue; 1953 1954 if (!list_len) { 1955 list_len = skb_put(skb, 1); 1956 *list_len = 0; 1957 } 1958 *list_len += 1; 1959 skb_put_u8(skb, (u8)elem); 1960 added = true; 1961 } 1962 1963 /* if we added a list but no extension list, make a zero-len one */ 1964 if (added && (!at_extension || !list_len)) 1965 skb_put_u8(skb, 0); 1966 1967 /* if nothing added remove extension element completely */ 1968 if (!added) 1969 skb_trim(skb, skb_len); 1970 else 1971 *len = skb->len - skb_len - 2; 1972} 1973 1974static void 1975ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1976 struct sk_buff *skb, u16 capab, 1977 const struct element *ext_capa, 1978 const u16 *outer_present_elems, 1979 struct ieee80211_mgd_assoc_data *assoc_data) 1980{ 1981 struct ieee80211_local *local = sdata->local; 1982 struct ieee80211_multi_link_elem *ml_elem; 1983 struct ieee80211_mle_basic_common_info *common; 1984 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1985 __le16 eml_capa = 0, mld_capa_ops = 0; 1986 unsigned int link_id; 1987 u8 *ml_elem_len; 1988 void *capab_pos; 1989 1990 if (!ieee80211_vif_is_mld(&sdata->vif)) 1991 return; 1992 1993 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1994 ieee80211_vif_type_p2p(&sdata->vif)); 1995 if (ift_ext_capa) { 1996 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1997 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1998 } 1999 2000 skb_put_u8(skb, WLAN_EID_EXTENSION); 2001 ml_elem_len = skb_put(skb, 1); 2002 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2003 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2004 ml_elem->control = 2005 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2006 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2007 common = skb_put(skb, sizeof(*common)); 2008 common->len = sizeof(*common) + 2009 2; /* MLD capa/ops */ 2010 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2011 2012 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2013 if (eml_capa & 2014 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2015 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2016 common->len += 2; /* EML capabilities */ 2017 ml_elem->control |= 2018 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2019 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2020 } 2021 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2022 2023 if (assoc_data->ext_mld_capa_ops) { 2024 ml_elem->control |= 2025 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2026 common->len += 2; 2027 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2028 sizeof(assoc_data->ext_mld_capa_ops)); 2029 } 2030 2031 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2032 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2033 const u8 *extra_elems; 2034 size_t extra_elems_len; 2035 size_t extra_used; 2036 u8 *subelem_len = NULL; 2037 __le16 ctrl; 2038 2039 if (!assoc_data->link[link_id].bss || 2040 link_id == assoc_data->assoc_link_id) 2041 continue; 2042 2043 extra_elems = assoc_data->link[link_id].elems; 2044 extra_elems_len = assoc_data->link[link_id].elems_len; 2045 2046 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2047 subelem_len = skb_put(skb, 1); 2048 2049 ctrl = cpu_to_le16(link_id | 2050 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2051 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2052 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2053 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2054 skb_put_data(skb, assoc_data->link[link_id].addr, 2055 ETH_ALEN); 2056 /* 2057 * Now add the contents of the (re)association request, 2058 * but the "listen interval" and "current AP address" 2059 * (if applicable) are skipped. So we only have 2060 * the capability field (remember the position and fill 2061 * later), followed by the elements added below by 2062 * calling ieee80211_add_link_elems(). 2063 */ 2064 capab_pos = skb_put(skb, 2); 2065 2066 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2067 ext_capa, 2068 extra_elems, 2069 extra_elems_len, 2070 link_id, NULL, 2071 link_present_elems, 2072 assoc_data); 2073 if (extra_elems) 2074 skb_put_data(skb, extra_elems + extra_used, 2075 extra_elems_len - extra_used); 2076 2077 put_unaligned_le16(capab, capab_pos); 2078 2079 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2080 link_present_elems); 2081 2082 ieee80211_fragment_element(skb, subelem_len, 2083 IEEE80211_MLE_SUBELEM_FRAGMENT); 2084 } 2085 2086 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2087} 2088 2089static int 2090ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2091 enum nl80211_iftype iftype, 2092 struct cfg80211_bss *cbss, 2093 size_t elems_len) 2094{ 2095 struct ieee80211_local *local = sdata->local; 2096 const struct ieee80211_sband_iftype_data *iftd; 2097 struct ieee80211_supported_band *sband; 2098 size_t size = 0; 2099 2100 if (!cbss) 2101 return size; 2102 2103 sband = local->hw.wiphy->bands[cbss->channel->band]; 2104 2105 /* add STA profile elements length */ 2106 size += elems_len; 2107 2108 /* and supported rates length */ 2109 size += 4 + sband->n_bitrates; 2110 2111 /* supported channels */ 2112 size += 2 + 2 * sband->n_channels; 2113 2114 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2115 if (iftd) 2116 size += iftd->vendor_elems.len; 2117 2118 /* power capability */ 2119 size += 4; 2120 2121 /* HT, VHT, HE, EHT */ 2122 size += 2 + sizeof(struct ieee80211_ht_cap); 2123 size += 2 + sizeof(struct ieee80211_vht_cap); 2124 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2125 sizeof(struct ieee80211_he_mcs_nss_supp) + 2126 IEEE80211_HE_PPE_THRES_MAX_LEN; 2127 2128 if (sband->band == NL80211_BAND_6GHZ) { 2129 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2130 /* reg connection */ 2131 size += 4; 2132 } 2133 2134 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2135 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2136 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2137 2138 return size; 2139} 2140 2141static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2142{ 2143 struct ieee80211_local *local = sdata->local; 2144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2145 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2146 struct ieee80211_link_data *link; 2147 struct sk_buff *skb; 2148 struct ieee80211_mgmt *mgmt; 2149 u8 *pos, qos_info, *ie_start; 2150 size_t offset, noffset; 2151 u16 capab = 0, link_capab; 2152 __le16 listen_int; 2153 struct element *ext_capa = NULL; 2154 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2155 struct ieee80211_prep_tx_info info = {}; 2156 unsigned int link_id, n_links = 0; 2157 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2158 void *capab_pos; 2159 size_t size; 2160 int ret; 2161 2162 /* we know it's writable, cast away the const */ 2163 if (assoc_data->ie_len) 2164 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2165 assoc_data->ie, 2166 assoc_data->ie_len); 2167 2168 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2169 2170 size = local->hw.extra_tx_headroom + 2171 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2172 2 + assoc_data->ssid_len + /* SSID */ 2173 assoc_data->ie_len + /* extra IEs */ 2174 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2175 9; /* WMM */ 2176 2177 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2178 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2179 size_t elems_len = assoc_data->link[link_id].elems_len; 2180 2181 if (!cbss) 2182 continue; 2183 2184 n_links++; 2185 2186 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2187 elems_len); 2188 2189 /* non-inheritance element */ 2190 size += 2 + 2 + PRESENT_ELEMS_MAX; 2191 2192 /* should be the same across all BSSes */ 2193 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2194 capab |= WLAN_CAPABILITY_PRIVACY; 2195 } 2196 2197 if (ieee80211_vif_is_mld(&sdata->vif)) { 2198 /* consider the multi-link element with STA profile */ 2199 size += sizeof(struct ieee80211_multi_link_elem); 2200 /* max common info field in basic multi-link element */ 2201 size += sizeof(struct ieee80211_mle_basic_common_info) + 2202 2 + /* capa & op */ 2203 2 + /* ext capa & op */ 2204 2; /* EML capa */ 2205 2206 /* The capability elements were already considered above */ 2207 size += (n_links - 1) * 2208 (1 + 1 + /* subelement ID/length */ 2209 2 + /* STA control */ 2210 1 + ETH_ALEN + 2 /* STA Info field */); 2211 } 2212 2213 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2214 if (WARN_ON(!link)) 2215 return -EINVAL; 2216 2217 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2218 return -EINVAL; 2219 2220 skb = alloc_skb(size, GFP_KERNEL); 2221 if (!skb) 2222 return -ENOMEM; 2223 2224 skb_reserve(skb, local->hw.extra_tx_headroom); 2225 2226 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2227 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2228 2229 /* Set MBSSID support for HE AP if needed */ 2230 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2231 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2232 ext_capa && ext_capa->datalen >= 3) 2233 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2234 2235 mgmt = skb_put_zero(skb, 24); 2236 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2237 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2238 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2239 2240 listen_int = cpu_to_le16(assoc_data->s1g ? 2241 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2242 local->hw.conf.listen_interval); 2243 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2244 skb_put(skb, 10); 2245 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2246 IEEE80211_STYPE_REASSOC_REQ); 2247 capab_pos = &mgmt->u.reassoc_req.capab_info; 2248 mgmt->u.reassoc_req.listen_interval = listen_int; 2249 memcpy(mgmt->u.reassoc_req.current_ap, 2250 assoc_data->prev_ap_addr, ETH_ALEN); 2251 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2252 } else { 2253 skb_put(skb, 4); 2254 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2255 IEEE80211_STYPE_ASSOC_REQ); 2256 capab_pos = &mgmt->u.assoc_req.capab_info; 2257 mgmt->u.assoc_req.listen_interval = listen_int; 2258 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2259 } 2260 2261 /* SSID */ 2262 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2263 ie_start = pos; 2264 *pos++ = WLAN_EID_SSID; 2265 *pos++ = assoc_data->ssid_len; 2266 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2267 2268 /* 2269 * This bit is technically reserved, so it shouldn't matter for either 2270 * the AP or us, but it also means we shouldn't set it. However, we've 2271 * always set it in the past, and apparently some EHT APs check that 2272 * we don't set it. To avoid interoperability issues with old APs that 2273 * for some reason check it and want it to be set, set the bit for all 2274 * pre-EHT connections as we used to do. 2275 */ 2276 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2277 !ieee80211_hw_check(&local->hw, STRICT)) 2278 capab |= WLAN_CAPABILITY_ESS; 2279 2280 /* add the elements for the assoc (main) link */ 2281 link_capab = capab; 2282 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2283 ext_capa, 2284 assoc_data->ie, 2285 assoc_data->ie_len, 2286 assoc_data->assoc_link_id, link, 2287 present_elems, assoc_data); 2288 put_unaligned_le16(link_capab, capab_pos); 2289 2290 /* if present, add any custom non-vendor IEs */ 2291 if (assoc_data->ie_len) { 2292 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2293 assoc_data->ie_len, 2294 offset); 2295 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2296 offset = noffset; 2297 } 2298 2299 if (assoc_data->wmm) { 2300 if (assoc_data->uapsd) { 2301 qos_info = ifmgd->uapsd_queues; 2302 qos_info |= (ifmgd->uapsd_max_sp_len << 2303 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2304 } else { 2305 qos_info = 0; 2306 } 2307 2308 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2309 } 2310 2311 /* add any remaining custom (i.e. vendor specific here) IEs */ 2312 if (assoc_data->ie_len) { 2313 noffset = assoc_data->ie_len; 2314 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2315 } 2316 2317 if (assoc_data->fils_kek_len) { 2318 ret = fils_encrypt_assoc_req(skb, assoc_data); 2319 if (ret < 0) { 2320 dev_kfree_skb(skb); 2321 return ret; 2322 } 2323 } 2324 2325 pos = skb_tail_pointer(skb); 2326 kfree(ifmgd->assoc_req_ies); 2327 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2328 if (!ifmgd->assoc_req_ies) { 2329 dev_kfree_skb(skb); 2330 return -ENOMEM; 2331 } 2332 2333 ifmgd->assoc_req_ies_len = pos - ie_start; 2334 2335 info.link_id = assoc_data->assoc_link_id; 2336 drv_mgd_prepare_tx(local, sdata, &info); 2337 2338 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2339 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2340 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2341 IEEE80211_TX_INTFL_MLME_CONN_TX; 2342 ieee80211_tx_skb(sdata, skb); 2343 2344 return 0; 2345} 2346 2347void ieee80211_send_pspoll(struct ieee80211_local *local, 2348 struct ieee80211_sub_if_data *sdata) 2349{ 2350 struct ieee80211_pspoll *pspoll; 2351 struct sk_buff *skb; 2352 2353 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2354 if (!skb) 2355 return; 2356 2357 pspoll = (struct ieee80211_pspoll *) skb->data; 2358 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2359 2360 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2361 ieee80211_tx_skb(sdata, skb); 2362} 2363 2364void ieee80211_send_nullfunc(struct ieee80211_local *local, 2365 struct ieee80211_sub_if_data *sdata, 2366 bool powersave) 2367{ 2368 struct sk_buff *skb; 2369 struct ieee80211_hdr_3addr *nullfunc; 2370 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2371 2372 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2373 !ieee80211_hw_check(&local->hw, 2374 DOESNT_SUPPORT_QOS_NDP)); 2375 if (!skb) 2376 return; 2377 2378 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2379 if (powersave) 2380 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2381 2382 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2383 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2384 2385 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2386 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2387 2388 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2389 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2390 2391 ieee80211_tx_skb(sdata, skb); 2392} 2393 2394void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2395 struct ieee80211_sub_if_data *sdata) 2396{ 2397 struct sk_buff *skb; 2398 struct ieee80211_hdr *nullfunc; 2399 __le16 fc; 2400 2401 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2402 return; 2403 2404 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2405 if (!skb) 2406 return; 2407 2408 skb_reserve(skb, local->hw.extra_tx_headroom); 2409 2410 nullfunc = skb_put_zero(skb, 30); 2411 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2412 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2413 nullfunc->frame_control = fc; 2414 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2415 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2416 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2417 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2418 2419 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2420 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2421 ieee80211_tx_skb(sdata, skb); 2422} 2423 2424/* spectrum management related things */ 2425static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2426 struct wiphy_work *work) 2427{ 2428 struct ieee80211_link_data *link = 2429 container_of(work, struct ieee80211_link_data, 2430 u.mgd.csa.switch_work.work); 2431 struct ieee80211_sub_if_data *sdata = link->sdata; 2432 struct ieee80211_local *local = sdata->local; 2433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2434 int ret; 2435 2436 if (!ieee80211_sdata_running(sdata)) 2437 return; 2438 2439 lockdep_assert_wiphy(local->hw.wiphy); 2440 2441 if (!ifmgd->associated) 2442 return; 2443 2444 if (!link->conf->csa_active) 2445 return; 2446 2447 /* 2448 * If the link isn't active (now), we cannot wait for beacons, won't 2449 * have a reserved chanctx, etc. Just switch over the chandef and 2450 * update cfg80211 directly. 2451 */ 2452 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2453 struct link_sta_info *link_sta; 2454 struct sta_info *ap_sta; 2455 2456 link->conf->chanreq = link->csa.chanreq; 2457 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2458 link->link_id); 2459 link->conf->csa_active = false; 2460 2461 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2462 if (WARN_ON(!ap_sta)) 2463 return; 2464 2465 link_sta = wiphy_dereference(wiphy, 2466 ap_sta->link[link->link_id]); 2467 if (WARN_ON(!link_sta)) 2468 return; 2469 2470 link_sta->pub->bandwidth = 2471 _ieee80211_sta_cur_vht_bw(link_sta, 2472 &link->csa.chanreq.oper); 2473 return; 2474 } 2475 2476 /* 2477 * using reservation isn't immediate as it may be deferred until later 2478 * with multi-vif. once reservation is complete it will re-schedule the 2479 * work with no reserved_chanctx so verify chandef to check if it 2480 * completed successfully 2481 */ 2482 2483 if (link->reserved_chanctx) { 2484 /* 2485 * with multi-vif csa driver may call ieee80211_csa_finish() 2486 * many times while waiting for other interfaces to use their 2487 * reservations 2488 */ 2489 if (link->reserved_ready) 2490 return; 2491 2492 ret = ieee80211_link_use_reserved_context(link); 2493 if (ret) { 2494 link_info(link, 2495 "failed to use reserved channel context, disconnecting (err=%d)\n", 2496 ret); 2497 wiphy_work_queue(sdata->local->hw.wiphy, 2498 &ifmgd->csa_connection_drop_work); 2499 } 2500 return; 2501 } 2502 2503 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2504 &link->csa.chanreq)) { 2505 link_info(link, 2506 "failed to finalize channel switch, disconnecting\n"); 2507 wiphy_work_queue(sdata->local->hw.wiphy, 2508 &ifmgd->csa_connection_drop_work); 2509 return; 2510 } 2511 2512 link->u.mgd.csa.waiting_bcn = true; 2513 2514 /* 2515 * The next beacon really should always be different, so this should 2516 * have no effect whatsoever. However, some APs (we observed this in 2517 * an Asus AXE11000), the beacon after the CSA might be identical to 2518 * the last beacon on the old channel - in this case we'd ignore it. 2519 * Resetting the CRC will lead us to handle it better (albeit with a 2520 * disconnect, but clearly the AP is broken.) 2521 */ 2522 link->u.mgd.beacon_crc_valid = false; 2523 2524 /* apply new TPE restrictions immediately on the new channel */ 2525 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2526 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2527 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2528 &link->u.mgd.csa.ap_chandef, 2529 &link->conf->chanreq.oper); 2530 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2531 sizeof(link->u.mgd.csa.tpe))) { 2532 link->conf->tpe = link->u.mgd.csa.tpe; 2533 ieee80211_link_info_change_notify(sdata, link, 2534 BSS_CHANGED_TPE); 2535 } 2536 } 2537 2538 /* 2539 * It is not necessary to reset these timers if any link does not 2540 * have an active CSA and that link still receives the beacons 2541 * when other links have active CSA. 2542 */ 2543 for_each_link_data(sdata, link) { 2544 if (!link->conf->csa_active) 2545 return; 2546 } 2547 2548 /* 2549 * Reset the beacon monitor and connection monitor timers when CSA 2550 * is active for all links in MLO when channel switch occurs in all 2551 * the links. 2552 */ 2553 ieee80211_sta_reset_beacon_monitor(sdata); 2554 ieee80211_sta_reset_conn_monitor(sdata); 2555} 2556 2557static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2558{ 2559 struct ieee80211_sub_if_data *sdata = link->sdata; 2560 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2561 int ret; 2562 2563 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2564 2565 WARN_ON(!link->conf->csa_active); 2566 2567 ieee80211_vif_unblock_queues_csa(sdata); 2568 2569 link->conf->csa_active = false; 2570 link->u.mgd.csa.blocked_tx = false; 2571 link->u.mgd.csa.waiting_bcn = false; 2572 2573 ret = drv_post_channel_switch(link); 2574 if (ret) { 2575 link_info(link, 2576 "driver post channel switch failed, disconnecting\n"); 2577 wiphy_work_queue(sdata->local->hw.wiphy, 2578 &ifmgd->csa_connection_drop_work); 2579 return; 2580 } 2581 2582 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2583 link->link_id); 2584} 2585 2586void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2587 unsigned int link_id) 2588{ 2589 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2590 2591 trace_api_chswitch_done(sdata, success, link_id); 2592 2593 rcu_read_lock(); 2594 2595 if (!success) { 2596 sdata_info(sdata, 2597 "driver channel switch failed (link %d), disconnecting\n", 2598 link_id); 2599 wiphy_work_queue(sdata->local->hw.wiphy, 2600 &sdata->u.mgd.csa_connection_drop_work); 2601 } else { 2602 struct ieee80211_link_data *link = 2603 rcu_dereference(sdata->link[link_id]); 2604 2605 if (WARN_ON(!link)) { 2606 rcu_read_unlock(); 2607 return; 2608 } 2609 2610 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 2611 &link->u.mgd.csa.switch_work, 0); 2612 } 2613 2614 rcu_read_unlock(); 2615} 2616EXPORT_SYMBOL(ieee80211_chswitch_done); 2617 2618static void 2619ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2620{ 2621 struct ieee80211_sub_if_data *sdata = link->sdata; 2622 struct ieee80211_local *local = sdata->local; 2623 2624 lockdep_assert_wiphy(local->hw.wiphy); 2625 2626 if (!local->ops->abort_channel_switch) 2627 return; 2628 2629 if (rcu_access_pointer(link->conf->chanctx_conf)) 2630 ieee80211_link_unreserve_chanctx(link); 2631 2632 ieee80211_vif_unblock_queues_csa(sdata); 2633 2634 link->conf->csa_active = false; 2635 link->u.mgd.csa.blocked_tx = false; 2636 2637 drv_abort_channel_switch(link); 2638} 2639 2640struct sta_csa_rnr_iter_data { 2641 struct ieee80211_link_data *link; 2642 struct ieee80211_channel *chan; 2643 u8 mld_id; 2644}; 2645 2646static enum cfg80211_rnr_iter_ret 2647ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2648 const struct ieee80211_neighbor_ap_info *info, 2649 const u8 *tbtt_info, u8 tbtt_info_len) 2650{ 2651 struct sta_csa_rnr_iter_data *data = _data; 2652 struct ieee80211_link_data *link = data->link; 2653 struct ieee80211_sub_if_data *sdata = link->sdata; 2654 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2655 const struct ieee80211_tbtt_info_ge_11 *ti; 2656 enum nl80211_band band; 2657 unsigned int center_freq; 2658 int link_id; 2659 2660 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2661 return RNR_ITER_CONTINUE; 2662 2663 if (tbtt_info_len < sizeof(*ti)) 2664 return RNR_ITER_CONTINUE; 2665 2666 ti = (const void *)tbtt_info; 2667 2668 if (ti->mld_params.mld_id != data->mld_id) 2669 return RNR_ITER_CONTINUE; 2670 2671 link_id = le16_get_bits(ti->mld_params.params, 2672 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2673 if (link_id != data->link->link_id) 2674 return RNR_ITER_CONTINUE; 2675 2676 /* we found the entry for our link! */ 2677 2678 /* this AP is confused, it had this right before ... just disconnect */ 2679 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2680 link_info(link, 2681 "AP now has invalid operating class in RNR, disconnect\n"); 2682 wiphy_work_queue(sdata->local->hw.wiphy, 2683 &ifmgd->csa_connection_drop_work); 2684 return RNR_ITER_BREAK; 2685 } 2686 2687 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2688 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2689 2690 return RNR_ITER_BREAK; 2691} 2692 2693static void 2694ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2695 struct ieee802_11_elems *elems) 2696{ 2697 struct ieee80211_sub_if_data *sdata = link->sdata; 2698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2699 struct sta_csa_rnr_iter_data data = { 2700 .link = link, 2701 }; 2702 2703 /* 2704 * If we get here, we see a beacon from another link without 2705 * CSA still being reported for it, so now we have to check 2706 * if the CSA was aborted or completed. This may not even be 2707 * perfectly possible if the CSA was only done for changing 2708 * the puncturing, but in that case if the link in inactive 2709 * we don't really care, and if it's an active link (or when 2710 * it's activated later) we'll get a beacon and adjust. 2711 */ 2712 2713 if (WARN_ON(!elems->ml_basic)) 2714 return; 2715 2716 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2717 2718 /* 2719 * So in order to do this, iterate the RNR element(s) and see 2720 * what channel is reported now. 2721 */ 2722 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2723 ieee80211_sta_csa_rnr_iter, &data); 2724 2725 if (!data.chan) { 2726 link_info(link, 2727 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2728 wiphy_work_queue(sdata->local->hw.wiphy, 2729 &ifmgd->csa_connection_drop_work); 2730 return; 2731 } 2732 2733 /* 2734 * If it doesn't match the CSA, then assume it aborted. This 2735 * may erroneously detect that it was _not_ aborted when it 2736 * was in fact aborted, but only changed the bandwidth or the 2737 * puncturing configuration, but we don't have enough data to 2738 * detect that. 2739 */ 2740 if (data.chan != link->csa.chanreq.oper.chan) 2741 ieee80211_sta_abort_chanswitch(link); 2742} 2743 2744enum ieee80211_csa_source { 2745 IEEE80211_CSA_SOURCE_BEACON, 2746 IEEE80211_CSA_SOURCE_OTHER_LINK, 2747 IEEE80211_CSA_SOURCE_PROT_ACTION, 2748 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2749}; 2750 2751static void 2752ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2753 u64 timestamp, u32 device_timestamp, 2754 struct ieee802_11_elems *full_elems, 2755 struct ieee802_11_elems *csa_elems, 2756 enum ieee80211_csa_source source) 2757{ 2758 struct ieee80211_sub_if_data *sdata = link->sdata; 2759 struct ieee80211_local *local = sdata->local; 2760 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2761 struct ieee80211_chanctx *chanctx = NULL; 2762 struct ieee80211_chanctx_conf *conf; 2763 struct ieee80211_csa_ie csa_ie = {}; 2764 struct ieee80211_channel_switch ch_switch = { 2765 .link_id = link->link_id, 2766 .timestamp = timestamp, 2767 .device_timestamp = device_timestamp, 2768 }; 2769 u32 csa_time_tu; 2770 ktime_t now; 2771 int res; 2772 2773 lockdep_assert_wiphy(local->hw.wiphy); 2774 2775 if (csa_elems) { 2776 struct cfg80211_bss *cbss = link->conf->bss; 2777 enum nl80211_band current_band; 2778 struct ieee80211_bss *bss; 2779 2780 if (WARN_ON(!cbss)) 2781 return; 2782 2783 current_band = cbss->channel->band; 2784 bss = (void *)cbss->priv; 2785 2786 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2787 current_band, 2788 bss->vht_cap_info, 2789 &link->u.mgd.conn, 2790 link->u.mgd.bssid, 2791 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2792 &csa_ie); 2793 if (res == 0) { 2794 ch_switch.block_tx = csa_ie.mode; 2795 ch_switch.chandef = csa_ie.chanreq.oper; 2796 ch_switch.count = csa_ie.count; 2797 ch_switch.delay = csa_ie.max_switch_time; 2798 } 2799 2800 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2801 } else { 2802 /* 2803 * If there was no per-STA profile for this link, we 2804 * get called with csa_elems == NULL. This of course means 2805 * there are no CSA elements, so set res=1 indicating 2806 * no more CSA. 2807 */ 2808 res = 1; 2809 } 2810 2811 if (res < 0) { 2812 /* ignore this case, not a protected frame */ 2813 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2814 return; 2815 goto drop_connection; 2816 } 2817 2818 if (link->conf->csa_active) { 2819 switch (source) { 2820 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2821 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2822 /* already processing - disregard action frames */ 2823 return; 2824 case IEEE80211_CSA_SOURCE_BEACON: 2825 if (link->u.mgd.csa.waiting_bcn) { 2826 ieee80211_chswitch_post_beacon(link); 2827 /* 2828 * If the CSA is still present after the switch 2829 * we need to consider it as a new CSA (possibly 2830 * to self). This happens by not returning here 2831 * so we'll get to the check below. 2832 */ 2833 } else if (res) { 2834 ieee80211_sta_abort_chanswitch(link); 2835 return; 2836 } else { 2837 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2838 return; 2839 } 2840 break; 2841 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2842 /* active link: we want to see the beacon to continue */ 2843 if (ieee80211_vif_link_active(&sdata->vif, 2844 link->link_id)) 2845 return; 2846 2847 /* switch work ran, so just complete the process */ 2848 if (link->u.mgd.csa.waiting_bcn) { 2849 ieee80211_chswitch_post_beacon(link); 2850 /* 2851 * If the CSA is still present after the switch 2852 * we need to consider it as a new CSA (possibly 2853 * to self). This happens by not returning here 2854 * so we'll get to the check below. 2855 */ 2856 break; 2857 } 2858 2859 /* link still has CSA but we already know, do nothing */ 2860 if (!res) 2861 return; 2862 2863 /* check in the RNR if the CSA aborted */ 2864 ieee80211_sta_other_link_csa_disappeared(link, 2865 full_elems); 2866 return; 2867 } 2868 } 2869 2870 /* no active CSA nor a new one */ 2871 if (res) { 2872 /* 2873 * However, we may have stopped queues when receiving a public 2874 * action frame that couldn't be protected, if it had the quiet 2875 * bit set. This is a trade-off, we want to be quiet as soon as 2876 * possible, but also don't trust the public action frame much, 2877 * as it can't be protected. 2878 */ 2879 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2880 link->u.mgd.csa.blocked_tx = false; 2881 ieee80211_vif_unblock_queues_csa(sdata); 2882 } 2883 return; 2884 } 2885 2886 /* 2887 * We don't really trust public action frames, but block queues (go to 2888 * quiet mode) for them anyway, we should get a beacon soon to either 2889 * know what the CSA really is, or figure out the public action frame 2890 * was actually an attack. 2891 */ 2892 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2893 if (csa_ie.mode) { 2894 link->u.mgd.csa.blocked_tx = true; 2895 ieee80211_vif_block_queues_csa(sdata); 2896 } 2897 return; 2898 } 2899 2900 if (link->conf->chanreq.oper.chan->band != 2901 csa_ie.chanreq.oper.chan->band) { 2902 link_info(link, 2903 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2904 link->u.mgd.bssid, 2905 csa_ie.chanreq.oper.chan->center_freq, 2906 csa_ie.chanreq.oper.width, 2907 csa_ie.chanreq.oper.center_freq1, 2908 csa_ie.chanreq.oper.center_freq2); 2909 goto drop_connection; 2910 } 2911 2912 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2913 IEEE80211_CHAN_DISABLED)) { 2914 link_info(link, 2915 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2916 link->u.mgd.bssid, 2917 csa_ie.chanreq.oper.chan->center_freq, 2918 csa_ie.chanreq.oper.chan->freq_offset, 2919 csa_ie.chanreq.oper.width, 2920 csa_ie.chanreq.oper.center_freq1, 2921 csa_ie.chanreq.oper.freq1_offset, 2922 csa_ie.chanreq.oper.center_freq2); 2923 goto drop_connection; 2924 } 2925 2926 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2927 &link->conf->chanreq.oper) && 2928 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2929 if (link->u.mgd.csa.ignored_same_chan) 2930 return; 2931 link_info(link, 2932 "AP %pM tries to chanswitch to same channel, ignore\n", 2933 link->u.mgd.bssid); 2934 link->u.mgd.csa.ignored_same_chan = true; 2935 return; 2936 } 2937 2938 /* 2939 * Drop all TDLS peers on the affected link - either we disconnect or 2940 * move to a different channel from this point on. There's no telling 2941 * what our peer will do. 2942 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2943 * have an incompatible wider chandef. 2944 */ 2945 ieee80211_teardown_tdls_peers(link); 2946 2947 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2948 lockdep_is_held(&local->hw.wiphy->mtx)); 2949 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2950 link_info(link, 2951 "no channel context assigned to vif?, disconnecting\n"); 2952 goto drop_connection; 2953 } 2954 2955 if (conf) 2956 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2957 2958 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2959 link_info(link, 2960 "driver doesn't support chan-switch with channel contexts\n"); 2961 goto drop_connection; 2962 } 2963 2964 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2965 link_info(link, 2966 "preparing for channel switch failed, disconnecting\n"); 2967 goto drop_connection; 2968 } 2969 2970 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2971 2972 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2973 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2974 &csa_ie.chanreq.ap); 2975 2976 if (chanctx) { 2977 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2978 chanctx->mode, false); 2979 if (res) { 2980 link_info(link, 2981 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2982 res); 2983 goto drop_connection; 2984 } 2985 } 2986 2987 link->conf->csa_active = true; 2988 link->u.mgd.csa.ignored_same_chan = false; 2989 link->u.mgd.beacon_crc_valid = false; 2990 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2991 2992 if (csa_ie.mode) 2993 ieee80211_vif_block_queues_csa(sdata); 2994 2995 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2996 link->link_id, csa_ie.count, 2997 csa_ie.mode); 2998 2999 /* we may have to handle timeout for deactivated link in software */ 3000 now = ktime_get_boottime(); 3001 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 3002 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 3003 3004 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3005 local->ops->channel_switch) { 3006 /* 3007 * Use driver's channel switch callback, the driver will 3008 * later call ieee80211_chswitch_done(). It may deactivate 3009 * the link as well, we handle that elsewhere and queue 3010 * the csa.switch_work for the calculated time then. 3011 */ 3012 drv_channel_switch(local, sdata, &ch_switch); 3013 return; 3014 } 3015 3016 /* channel switch handled in software */ 3017 wiphy_hrtimer_work_queue(local->hw.wiphy, 3018 &link->u.mgd.csa.switch_work, 3019 link->u.mgd.csa.time - now); 3020 return; 3021 drop_connection: 3022 /* 3023 * This is just so that the disconnect flow will know that 3024 * we were trying to switch channel and failed. In case the 3025 * mode is 1 (we are not allowed to Tx), we will know not to 3026 * send a deauthentication frame. Those two fields will be 3027 * reset when the disconnection worker runs. 3028 */ 3029 link->conf->csa_active = true; 3030 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3031 3032 wiphy_work_queue(sdata->local->hw.wiphy, 3033 &ifmgd->csa_connection_drop_work); 3034} 3035 3036struct sta_bss_param_ch_cnt_data { 3037 struct ieee80211_sub_if_data *sdata; 3038 u8 reporting_link_id; 3039 u8 mld_id; 3040}; 3041 3042static enum cfg80211_rnr_iter_ret 3043ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3044 const struct ieee80211_neighbor_ap_info *info, 3045 const u8 *tbtt_info, u8 tbtt_info_len) 3046{ 3047 struct sta_bss_param_ch_cnt_data *data = _data; 3048 struct ieee80211_sub_if_data *sdata = data->sdata; 3049 const struct ieee80211_tbtt_info_ge_11 *ti; 3050 u8 bss_param_ch_cnt; 3051 int link_id; 3052 3053 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3054 return RNR_ITER_CONTINUE; 3055 3056 if (tbtt_info_len < sizeof(*ti)) 3057 return RNR_ITER_CONTINUE; 3058 3059 ti = (const void *)tbtt_info; 3060 3061 if (ti->mld_params.mld_id != data->mld_id) 3062 return RNR_ITER_CONTINUE; 3063 3064 link_id = le16_get_bits(ti->mld_params.params, 3065 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3066 bss_param_ch_cnt = 3067 le16_get_bits(ti->mld_params.params, 3068 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3069 3070 if (bss_param_ch_cnt != 255 && 3071 link_id < ARRAY_SIZE(sdata->link)) { 3072 struct ieee80211_link_data *link = 3073 sdata_dereference(sdata->link[link_id], sdata); 3074 3075 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3076 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3077 link->conf->bss_param_ch_cnt_link_id = 3078 data->reporting_link_id; 3079 } 3080 } 3081 3082 return RNR_ITER_CONTINUE; 3083} 3084 3085static void 3086ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3087 struct ieee80211_bss_conf *bss_conf, 3088 struct ieee802_11_elems *elems) 3089{ 3090 struct sta_bss_param_ch_cnt_data data = { 3091 .reporting_link_id = bss_conf->link_id, 3092 .sdata = sdata, 3093 }; 3094 int bss_param_ch_cnt; 3095 3096 if (!elems->ml_basic) 3097 return; 3098 3099 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3100 3101 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3102 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3103 3104 bss_param_ch_cnt = 3105 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3106 3107 /* 3108 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3109 * didn't change to indicate that we got a beacon on our own 3110 * link. 3111 */ 3112 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3113 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3114 bss_conf->bss_param_ch_cnt_link_id = 3115 bss_conf->link_id; 3116 } 3117} 3118 3119static bool 3120ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3121 const u8 *country_ie, u8 country_ie_len, 3122 const u8 *pwr_constr_elem, 3123 int *chan_pwr, int *pwr_reduction) 3124{ 3125 struct ieee80211_country_ie_triplet *triplet; 3126 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3127 int i, chan_increment; 3128 bool have_chan_pwr = false; 3129 3130 /* Invalid IE */ 3131 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3132 return false; 3133 3134 triplet = (void *)(country_ie + 3); 3135 country_ie_len -= 3; 3136 3137 switch (channel->band) { 3138 default: 3139 WARN_ON_ONCE(1); 3140 fallthrough; 3141 case NL80211_BAND_2GHZ: 3142 case NL80211_BAND_60GHZ: 3143 case NL80211_BAND_LC: 3144 chan_increment = 1; 3145 break; 3146 case NL80211_BAND_5GHZ: 3147 chan_increment = 4; 3148 break; 3149 case NL80211_BAND_6GHZ: 3150 /* 3151 * In the 6 GHz band, the "maximum transmit power level" 3152 * field in the triplets is reserved, and thus will be 3153 * zero and we shouldn't use it to control TX power. 3154 * The actual TX power will be given in the transmit 3155 * power envelope element instead. 3156 */ 3157 return false; 3158 } 3159 3160 /* find channel */ 3161 while (country_ie_len >= 3) { 3162 u8 first_channel = triplet->chans.first_channel; 3163 3164 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3165 goto next; 3166 3167 for (i = 0; i < triplet->chans.num_channels; i++) { 3168 if (first_channel + i * chan_increment == chan) { 3169 have_chan_pwr = true; 3170 *chan_pwr = triplet->chans.max_power; 3171 break; 3172 } 3173 } 3174 if (have_chan_pwr) 3175 break; 3176 3177 next: 3178 triplet++; 3179 country_ie_len -= 3; 3180 } 3181 3182 if (have_chan_pwr && pwr_constr_elem) 3183 *pwr_reduction = *pwr_constr_elem; 3184 else 3185 *pwr_reduction = 0; 3186 3187 return have_chan_pwr; 3188} 3189 3190static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3191 const u8 *cisco_dtpc_ie, 3192 int *pwr_level) 3193{ 3194 /* From practical testing, the first data byte of the DTPC element 3195 * seems to contain the requested dBm level, and the CLI on Cisco 3196 * APs clearly state the range is -127 to 127 dBm, which indicates 3197 * a signed byte, although it seemingly never actually goes negative. 3198 * The other byte seems to always be zero. 3199 */ 3200 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3201} 3202 3203static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3204 struct ieee80211_channel *channel, 3205 struct ieee80211_mgmt *mgmt, 3206 const u8 *country_ie, u8 country_ie_len, 3207 const u8 *pwr_constr_ie, 3208 const u8 *cisco_dtpc_ie) 3209{ 3210 struct ieee80211_sub_if_data *sdata = link->sdata; 3211 bool has_80211h_pwr = false, has_cisco_pwr = false; 3212 int chan_pwr = 0, pwr_reduction_80211h = 0; 3213 int pwr_level_cisco, pwr_level_80211h; 3214 int new_ap_level; 3215 __le16 capab = mgmt->u.probe_resp.capab_info; 3216 3217 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3218 return 0; /* TODO */ 3219 3220 if (country_ie && 3221 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3222 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3223 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3224 channel, country_ie, country_ie_len, 3225 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3226 pwr_level_80211h = 3227 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3228 } 3229 3230 if (cisco_dtpc_ie) { 3231 ieee80211_find_cisco_dtpc( 3232 channel, cisco_dtpc_ie, &pwr_level_cisco); 3233 has_cisco_pwr = true; 3234 } 3235 3236 if (!has_80211h_pwr && !has_cisco_pwr) 3237 return 0; 3238 3239 /* If we have both 802.11h and Cisco DTPC, apply both limits 3240 * by picking the smallest of the two power levels advertised. 3241 */ 3242 if (has_80211h_pwr && 3243 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3244 new_ap_level = pwr_level_80211h; 3245 3246 if (link->ap_power_level == new_ap_level) 3247 return 0; 3248 3249 sdata_dbg(sdata, 3250 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3251 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3252 link->u.mgd.bssid); 3253 } else { /* has_cisco_pwr is always true here. */ 3254 new_ap_level = pwr_level_cisco; 3255 3256 if (link->ap_power_level == new_ap_level) 3257 return 0; 3258 3259 sdata_dbg(sdata, 3260 "Limiting TX power to %d dBm as advertised by %pM\n", 3261 pwr_level_cisco, link->u.mgd.bssid); 3262 } 3263 3264 link->ap_power_level = new_ap_level; 3265 if (__ieee80211_recalc_txpower(link)) 3266 return BSS_CHANGED_TXPOWER; 3267 return 0; 3268} 3269 3270/* powersave */ 3271static void ieee80211_enable_ps(struct ieee80211_local *local, 3272 struct ieee80211_sub_if_data *sdata) 3273{ 3274 struct ieee80211_conf *conf = &local->hw.conf; 3275 3276 /* 3277 * If we are scanning right now then the parameters will 3278 * take effect when scan finishes. 3279 */ 3280 if (local->scanning) 3281 return; 3282 3283 if (conf->dynamic_ps_timeout > 0 && 3284 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3285 mod_timer(&local->dynamic_ps_timer, jiffies + 3286 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3287 } else { 3288 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3289 ieee80211_send_nullfunc(local, sdata, true); 3290 3291 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3292 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3293 return; 3294 3295 conf->flags |= IEEE80211_CONF_PS; 3296 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3297 } 3298} 3299 3300static void ieee80211_change_ps(struct ieee80211_local *local) 3301{ 3302 struct ieee80211_conf *conf = &local->hw.conf; 3303 3304 if (local->ps_sdata) { 3305 ieee80211_enable_ps(local, local->ps_sdata); 3306 } else if (conf->flags & IEEE80211_CONF_PS) { 3307 conf->flags &= ~IEEE80211_CONF_PS; 3308 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3309 timer_delete_sync(&local->dynamic_ps_timer); 3310 wiphy_work_cancel(local->hw.wiphy, 3311 &local->dynamic_ps_enable_work); 3312 } 3313} 3314 3315static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3316{ 3317 struct ieee80211_local *local = sdata->local; 3318 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3319 struct sta_info *sta = NULL; 3320 bool authorized = false; 3321 3322 if (!mgd->powersave) 3323 return false; 3324 3325 if (mgd->broken_ap) 3326 return false; 3327 3328 if (!mgd->associated) 3329 return false; 3330 3331 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3332 return false; 3333 3334 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3335 !sdata->deflink.u.mgd.have_beacon) 3336 return false; 3337 3338 rcu_read_lock(); 3339 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3340 if (sta) 3341 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3342 rcu_read_unlock(); 3343 3344 return authorized; 3345} 3346 3347/* need to hold RTNL or interface lock */ 3348void ieee80211_recalc_ps(struct ieee80211_local *local) 3349{ 3350 struct ieee80211_sub_if_data *sdata, *found = NULL; 3351 int count = 0; 3352 int timeout; 3353 3354 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3355 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3356 local->ps_sdata = NULL; 3357 return; 3358 } 3359 3360 list_for_each_entry(sdata, &local->interfaces, list) { 3361 if (!ieee80211_sdata_running(sdata)) 3362 continue; 3363 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3364 /* If an AP vif is found, then disable PS 3365 * by setting the count to zero thereby setting 3366 * ps_sdata to NULL. 3367 */ 3368 count = 0; 3369 break; 3370 } 3371 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3372 continue; 3373 found = sdata; 3374 count++; 3375 } 3376 3377 if (count == 1 && ieee80211_powersave_allowed(found)) { 3378 u8 dtimper = found->deflink.u.mgd.dtim_period; 3379 3380 timeout = local->dynamic_ps_forced_timeout; 3381 if (timeout < 0) 3382 timeout = 100; 3383 local->hw.conf.dynamic_ps_timeout = timeout; 3384 3385 /* If the TIM IE is invalid, pretend the value is 1 */ 3386 if (!dtimper) 3387 dtimper = 1; 3388 3389 local->hw.conf.ps_dtim_period = dtimper; 3390 local->ps_sdata = found; 3391 } else { 3392 local->ps_sdata = NULL; 3393 } 3394 3395 ieee80211_change_ps(local); 3396} 3397 3398void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3399{ 3400 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3401 3402 if (sdata->vif.cfg.ps != ps_allowed) { 3403 sdata->vif.cfg.ps = ps_allowed; 3404 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3405 } 3406} 3407 3408void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3409 struct wiphy_work *work) 3410{ 3411 struct ieee80211_local *local = 3412 container_of(work, struct ieee80211_local, 3413 dynamic_ps_disable_work); 3414 3415 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3416 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3417 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3418 } 3419 3420 ieee80211_wake_queues_by_reason(&local->hw, 3421 IEEE80211_MAX_QUEUE_MAP, 3422 IEEE80211_QUEUE_STOP_REASON_PS, 3423 false); 3424} 3425 3426void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3427 struct wiphy_work *work) 3428{ 3429 struct ieee80211_local *local = 3430 container_of(work, struct ieee80211_local, 3431 dynamic_ps_enable_work); 3432 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3433 struct ieee80211_if_managed *ifmgd; 3434 unsigned long flags; 3435 int q; 3436 3437 /* can only happen when PS was just disabled anyway */ 3438 if (!sdata) 3439 return; 3440 3441 ifmgd = &sdata->u.mgd; 3442 3443 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3444 return; 3445 3446 if (local->hw.conf.dynamic_ps_timeout > 0) { 3447 /* don't enter PS if TX frames are pending */ 3448 if (drv_tx_frames_pending(local)) { 3449 mod_timer(&local->dynamic_ps_timer, jiffies + 3450 msecs_to_jiffies( 3451 local->hw.conf.dynamic_ps_timeout)); 3452 return; 3453 } 3454 3455 /* 3456 * transmission can be stopped by others which leads to 3457 * dynamic_ps_timer expiry. Postpone the ps timer if it 3458 * is not the actual idle state. 3459 */ 3460 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3461 for (q = 0; q < local->hw.queues; q++) { 3462 if (local->queue_stop_reasons[q]) { 3463 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3464 flags); 3465 mod_timer(&local->dynamic_ps_timer, jiffies + 3466 msecs_to_jiffies( 3467 local->hw.conf.dynamic_ps_timeout)); 3468 return; 3469 } 3470 } 3471 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3472 } 3473 3474 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3475 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3476 if (drv_tx_frames_pending(local)) { 3477 mod_timer(&local->dynamic_ps_timer, jiffies + 3478 msecs_to_jiffies( 3479 local->hw.conf.dynamic_ps_timeout)); 3480 } else { 3481 ieee80211_send_nullfunc(local, sdata, true); 3482 /* Flush to get the tx status of nullfunc frame */ 3483 ieee80211_flush_queues(local, sdata, false); 3484 } 3485 } 3486 3487 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3488 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3489 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3490 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3491 local->hw.conf.flags |= IEEE80211_CONF_PS; 3492 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3493 } 3494} 3495 3496void ieee80211_dynamic_ps_timer(struct timer_list *t) 3497{ 3498 struct ieee80211_local *local = timer_container_of(local, t, 3499 dynamic_ps_timer); 3500 3501 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3502} 3503 3504void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3505{ 3506 struct ieee80211_link_data *link = 3507 container_of(work, struct ieee80211_link_data, 3508 dfs_cac_timer_work.work); 3509 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3510 struct ieee80211_sub_if_data *sdata = link->sdata; 3511 3512 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3513 3514 if (sdata->wdev.links[link->link_id].cac_started) { 3515 ieee80211_link_release_channel(link); 3516 cfg80211_cac_event(sdata->dev, &chandef, 3517 NL80211_RADAR_CAC_FINISHED, 3518 GFP_KERNEL, link->link_id); 3519 } 3520} 3521 3522static bool 3523__ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3524{ 3525 struct ieee80211_local *local = sdata->local; 3526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3527 bool ret = false; 3528 int ac; 3529 3530 if (local->hw.queues < IEEE80211_NUM_ACS) 3531 return false; 3532 3533 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3534 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3535 int non_acm_ac; 3536 unsigned long now = jiffies; 3537 3538 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3539 tx_tspec->admitted_time && 3540 time_after(now, tx_tspec->time_slice_start + HZ)) { 3541 tx_tspec->consumed_tx_time = 0; 3542 tx_tspec->time_slice_start = now; 3543 3544 if (tx_tspec->downgraded) 3545 tx_tspec->action = 3546 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3547 } 3548 3549 switch (tx_tspec->action) { 3550 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3551 /* take the original parameters */ 3552 if (drv_conf_tx(local, &sdata->deflink, ac, 3553 &sdata->deflink.tx_conf[ac])) 3554 link_err(&sdata->deflink, 3555 "failed to set TX queue parameters for queue %d\n", 3556 ac); 3557 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3558 tx_tspec->downgraded = false; 3559 ret = true; 3560 break; 3561 case TX_TSPEC_ACTION_DOWNGRADE: 3562 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3563 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3564 ret = true; 3565 break; 3566 } 3567 /* downgrade next lower non-ACM AC */ 3568 for (non_acm_ac = ac + 1; 3569 non_acm_ac < IEEE80211_NUM_ACS; 3570 non_acm_ac++) 3571 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3572 break; 3573 /* Usually the loop will result in using BK even if it 3574 * requires admission control, but such a configuration 3575 * makes no sense and we have to transmit somehow - the 3576 * AC selection does the same thing. 3577 * If we started out trying to downgrade from BK, then 3578 * the extra condition here might be needed. 3579 */ 3580 if (non_acm_ac >= IEEE80211_NUM_ACS) 3581 non_acm_ac = IEEE80211_AC_BK; 3582 if (drv_conf_tx(local, &sdata->deflink, ac, 3583 &sdata->deflink.tx_conf[non_acm_ac])) 3584 link_err(&sdata->deflink, 3585 "failed to set TX queue parameters for queue %d\n", 3586 ac); 3587 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3588 ret = true; 3589 wiphy_delayed_work_queue(local->hw.wiphy, 3590 &ifmgd->tx_tspec_wk, 3591 tx_tspec->time_slice_start + 3592 HZ - now + 1); 3593 break; 3594 case TX_TSPEC_ACTION_NONE: 3595 /* nothing now */ 3596 break; 3597 } 3598 } 3599 3600 return ret; 3601} 3602 3603void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3604{ 3605 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3606 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3607 BSS_CHANGED_QOS); 3608} 3609 3610static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3611 struct wiphy_work *work) 3612{ 3613 struct ieee80211_sub_if_data *sdata; 3614 3615 sdata = container_of(work, struct ieee80211_sub_if_data, 3616 u.mgd.tx_tspec_wk.work); 3617 ieee80211_sta_handle_tspec_ac_params(sdata); 3618} 3619 3620void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3621{ 3622 struct ieee80211_sub_if_data *sdata = link->sdata; 3623 struct ieee80211_local *local = sdata->local; 3624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3625 struct ieee80211_tx_queue_params *params = link->tx_conf; 3626 u8 ac; 3627 3628 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3629 mlme_dbg(sdata, 3630 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3631 ac, params[ac].acm, 3632 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3633 params[ac].txop, params[ac].uapsd, 3634 ifmgd->tx_tspec[ac].downgraded); 3635 if (!ifmgd->tx_tspec[ac].downgraded && 3636 drv_conf_tx(local, link, ac, ¶ms[ac])) 3637 link_err(link, 3638 "failed to set TX queue parameters for AC %d\n", 3639 ac); 3640 } 3641} 3642 3643/* MLME */ 3644static bool 3645_ieee80211_sta_wmm_params(struct ieee80211_local *local, 3646 struct ieee80211_link_data *link, 3647 const u8 *wmm_param, size_t wmm_param_len, 3648 const struct ieee80211_mu_edca_param_set *mu_edca) 3649{ 3650 struct ieee80211_sub_if_data *sdata = link->sdata; 3651 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3653 size_t left; 3654 int count, mu_edca_count, ac; 3655 const u8 *pos; 3656 u8 uapsd_queues = 0; 3657 3658 if (!local->ops->conf_tx) 3659 return false; 3660 3661 if (local->hw.queues < IEEE80211_NUM_ACS) 3662 return false; 3663 3664 if (!wmm_param) 3665 return false; 3666 3667 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3668 return false; 3669 3670 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3671 uapsd_queues = ifmgd->uapsd_queues; 3672 3673 count = wmm_param[6] & 0x0f; 3674 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3675 * if mu_edca was preset before and now it disappeared tell 3676 * the driver about it. 3677 */ 3678 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3679 if (count == link->u.mgd.wmm_last_param_set && 3680 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3681 return false; 3682 link->u.mgd.wmm_last_param_set = count; 3683 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3684 3685 pos = wmm_param + 8; 3686 left = wmm_param_len - 8; 3687 3688 memset(¶ms, 0, sizeof(params)); 3689 3690 sdata->wmm_acm = 0; 3691 for (; left >= 4; left -= 4, pos += 4) { 3692 int aci = (pos[0] >> 5) & 0x03; 3693 int acm = (pos[0] >> 4) & 0x01; 3694 bool uapsd = false; 3695 3696 switch (aci) { 3697 case 1: /* AC_BK */ 3698 ac = IEEE80211_AC_BK; 3699 if (acm) 3700 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3701 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3702 uapsd = true; 3703 params[ac].mu_edca = !!mu_edca; 3704 if (mu_edca) 3705 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3706 break; 3707 case 2: /* AC_VI */ 3708 ac = IEEE80211_AC_VI; 3709 if (acm) 3710 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3711 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3712 uapsd = true; 3713 params[ac].mu_edca = !!mu_edca; 3714 if (mu_edca) 3715 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3716 break; 3717 case 3: /* AC_VO */ 3718 ac = IEEE80211_AC_VO; 3719 if (acm) 3720 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3721 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3722 uapsd = true; 3723 params[ac].mu_edca = !!mu_edca; 3724 if (mu_edca) 3725 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3726 break; 3727 case 0: /* AC_BE */ 3728 default: 3729 ac = IEEE80211_AC_BE; 3730 if (acm) 3731 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3732 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3733 uapsd = true; 3734 params[ac].mu_edca = !!mu_edca; 3735 if (mu_edca) 3736 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3737 break; 3738 } 3739 3740 params[ac].aifs = pos[0] & 0x0f; 3741 3742 if (params[ac].aifs < 2) { 3743 link_info(link, 3744 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3745 params[ac].aifs, aci); 3746 params[ac].aifs = 2; 3747 } 3748 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3749 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3750 params[ac].txop = get_unaligned_le16(pos + 2); 3751 params[ac].acm = acm; 3752 params[ac].uapsd = uapsd; 3753 3754 if (params[ac].cw_min == 0 || 3755 params[ac].cw_min > params[ac].cw_max) { 3756 link_info(link, 3757 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3758 params[ac].cw_min, params[ac].cw_max, aci); 3759 return false; 3760 } 3761 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3762 } 3763 3764 /* WMM specification requires all 4 ACIs. */ 3765 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3766 if (params[ac].cw_min == 0) { 3767 link_info(link, 3768 "AP has invalid WMM params (missing AC %d), using defaults\n", 3769 ac); 3770 return false; 3771 } 3772 } 3773 3774 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3775 link->tx_conf[ac] = params[ac]; 3776 3777 return true; 3778} 3779 3780static bool 3781ieee80211_sta_wmm_params(struct ieee80211_local *local, 3782 struct ieee80211_link_data *link, 3783 const u8 *wmm_param, size_t wmm_param_len, 3784 const struct ieee80211_mu_edca_param_set *mu_edca) 3785{ 3786 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3787 mu_edca)) 3788 return false; 3789 3790 ieee80211_mgd_set_link_qos_params(link); 3791 3792 /* enable WMM or activate new settings */ 3793 link->conf->qos = true; 3794 return true; 3795} 3796 3797static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3798{ 3799 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3800 3801 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3802 ieee80211_run_deferred_scan(sdata->local); 3803} 3804 3805static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3806{ 3807 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3808 3809 __ieee80211_stop_poll(sdata); 3810} 3811 3812static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3813 u16 capab, bool erp_valid, u8 erp) 3814{ 3815 struct ieee80211_bss_conf *bss_conf = link->conf; 3816 struct ieee80211_supported_band *sband; 3817 u64 changed = 0; 3818 bool use_protection; 3819 bool use_short_preamble; 3820 bool use_short_slot; 3821 3822 sband = ieee80211_get_link_sband(link); 3823 if (!sband) 3824 return changed; 3825 3826 if (erp_valid) { 3827 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3828 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3829 } else { 3830 use_protection = false; 3831 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3832 } 3833 3834 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3835 if (sband->band == NL80211_BAND_5GHZ || 3836 sband->band == NL80211_BAND_6GHZ) 3837 use_short_slot = true; 3838 3839 if (use_protection != bss_conf->use_cts_prot) { 3840 bss_conf->use_cts_prot = use_protection; 3841 changed |= BSS_CHANGED_ERP_CTS_PROT; 3842 } 3843 3844 if (use_short_preamble != bss_conf->use_short_preamble) { 3845 bss_conf->use_short_preamble = use_short_preamble; 3846 changed |= BSS_CHANGED_ERP_PREAMBLE; 3847 } 3848 3849 if (use_short_slot != bss_conf->use_short_slot) { 3850 bss_conf->use_short_slot = use_short_slot; 3851 changed |= BSS_CHANGED_ERP_SLOT; 3852 } 3853 3854 return changed; 3855} 3856 3857static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3858 struct cfg80211_bss *cbss) 3859{ 3860 struct ieee80211_sub_if_data *sdata = link->sdata; 3861 struct ieee80211_bss_conf *bss_conf = link->conf; 3862 struct ieee80211_bss *bss = (void *)cbss->priv; 3863 u64 changed = BSS_CHANGED_QOS; 3864 3865 /* not really used in MLO */ 3866 sdata->u.mgd.beacon_timeout = 3867 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3868 bss_conf->beacon_int)); 3869 3870 changed |= ieee80211_handle_bss_capability(link, 3871 bss_conf->assoc_capability, 3872 bss->has_erp_value, 3873 bss->erp_value); 3874 3875 ieee80211_check_rate_mask(link); 3876 3877 link->conf->bss = cbss; 3878 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3879 3880 if (sdata->vif.p2p || 3881 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3882 const struct cfg80211_bss_ies *ies; 3883 3884 rcu_read_lock(); 3885 ies = rcu_dereference(cbss->ies); 3886 if (ies) { 3887 int ret; 3888 3889 ret = cfg80211_get_p2p_attr( 3890 ies->data, ies->len, 3891 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3892 (u8 *) &bss_conf->p2p_noa_attr, 3893 sizeof(bss_conf->p2p_noa_attr)); 3894 if (ret >= 2) { 3895 link->u.mgd.p2p_noa_index = 3896 bss_conf->p2p_noa_attr.index; 3897 changed |= BSS_CHANGED_P2P_PS; 3898 } 3899 } 3900 rcu_read_unlock(); 3901 } 3902 3903 if (link->u.mgd.have_beacon) { 3904 bss_conf->beacon_rate = bss->beacon_rate; 3905 changed |= BSS_CHANGED_BEACON_INFO; 3906 } else { 3907 bss_conf->beacon_rate = NULL; 3908 } 3909 3910 /* Tell the driver to monitor connection quality (if supported) */ 3911 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3912 bss_conf->cqm_rssi_thold) 3913 changed |= BSS_CHANGED_CQM; 3914 3915 return changed; 3916} 3917 3918static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3919 struct ieee80211_mgd_assoc_data *assoc_data, 3920 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3921{ 3922 struct ieee80211_local *local = sdata->local; 3923 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3924 u64 vif_changed = BSS_CHANGED_ASSOC; 3925 unsigned int link_id; 3926 3927 lockdep_assert_wiphy(local->hw.wiphy); 3928 3929 sdata->u.mgd.associated = true; 3930 3931 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3932 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3933 struct ieee80211_link_data *link; 3934 3935 if (!cbss || 3936 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3937 continue; 3938 3939 if (ieee80211_vif_is_mld(&sdata->vif) && 3940 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3941 continue; 3942 3943 link = sdata_dereference(sdata->link[link_id], sdata); 3944 if (WARN_ON(!link)) 3945 return; 3946 3947 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3948 } 3949 3950 /* just to be sure */ 3951 ieee80211_stop_poll(sdata); 3952 3953 ieee80211_led_assoc(local, 1); 3954 3955 vif_cfg->assoc = 1; 3956 3957 /* Enable ARP filtering */ 3958 if (vif_cfg->arp_addr_cnt) 3959 vif_changed |= BSS_CHANGED_ARP_FILTER; 3960 3961 if (ieee80211_vif_is_mld(&sdata->vif)) { 3962 for (link_id = 0; 3963 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3964 link_id++) { 3965 struct ieee80211_link_data *link; 3966 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3967 3968 if (!cbss || 3969 !(BIT(link_id) & 3970 ieee80211_vif_usable_links(&sdata->vif)) || 3971 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3972 continue; 3973 3974 link = sdata_dereference(sdata->link[link_id], sdata); 3975 if (WARN_ON(!link)) 3976 return; 3977 3978 ieee80211_link_info_change_notify(sdata, link, 3979 changed[link_id]); 3980 3981 ieee80211_recalc_smps(sdata, link); 3982 } 3983 3984 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3985 } else { 3986 ieee80211_bss_info_change_notify(sdata, 3987 vif_changed | changed[0]); 3988 } 3989 3990 ieee80211_recalc_ps(local); 3991 3992 /* leave this here to not change ordering in non-MLO cases */ 3993 if (!ieee80211_vif_is_mld(&sdata->vif)) 3994 ieee80211_recalc_smps(sdata, &sdata->deflink); 3995 ieee80211_recalc_ps_vif(sdata); 3996 3997 netif_carrier_on(sdata->dev); 3998} 3999 4000static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 4001{ 4002 struct ieee80211_mgd_assoc_data *add_links_data = 4003 sdata->u.mgd.reconf.add_links_data; 4004 4005 if (!ieee80211_vif_is_mld(&sdata->vif) || 4006 !(sdata->u.mgd.reconf.added_links | 4007 sdata->u.mgd.reconf.removed_links)) 4008 return; 4009 4010 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4011 &sdata->u.mgd.reconf.wk); 4012 sdata->u.mgd.reconf.added_links = 0; 4013 sdata->u.mgd.reconf.removed_links = 0; 4014 sdata->u.mgd.reconf.dialog_token = 0; 4015 4016 if (add_links_data) { 4017 struct cfg80211_mlo_reconf_done_data done_data = {}; 4018 u8 link_id; 4019 4020 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4021 link_id++) 4022 done_data.links[link_id].bss = 4023 add_links_data->link[link_id].bss; 4024 4025 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4026 4027 kfree(sdata->u.mgd.reconf.add_links_data); 4028 sdata->u.mgd.reconf.add_links_data = NULL; 4029 } 4030} 4031 4032static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4033 u16 stype, u16 reason, bool tx, 4034 u8 *frame_buf) 4035{ 4036 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4037 struct ieee80211_local *local = sdata->local; 4038 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4039 unsigned int link_id; 4040 u64 changed = 0; 4041 struct ieee80211_prep_tx_info info = { 4042 .subtype = stype, 4043 .was_assoc = true, 4044 .link_id = ffs(sdata->vif.active_links) - 1, 4045 }; 4046 4047 lockdep_assert_wiphy(local->hw.wiphy); 4048 4049 if (frame_buf) 4050 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4051 4052 if (WARN_ON(!ap_sta)) 4053 return; 4054 4055 if (WARN_ON_ONCE(tx && !frame_buf)) 4056 return; 4057 4058 if (WARN_ON(!ifmgd->associated)) 4059 return; 4060 4061 ieee80211_stop_poll(sdata); 4062 4063 ifmgd->associated = false; 4064 4065 if (tx) { 4066 bool tx_link_found = false; 4067 4068 for (link_id = 0; 4069 link_id < ARRAY_SIZE(sdata->link); 4070 link_id++) { 4071 struct ieee80211_link_data *link; 4072 4073 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4074 continue; 4075 4076 link = sdata_dereference(sdata->link[link_id], sdata); 4077 if (WARN_ON_ONCE(!link)) 4078 continue; 4079 4080 if (link->u.mgd.csa.blocked_tx) 4081 continue; 4082 4083 tx_link_found = true; 4084 break; 4085 } 4086 4087 tx = tx_link_found; 4088 } 4089 4090 /* other links will be destroyed */ 4091 sdata->deflink.conf->bss = NULL; 4092 sdata->deflink.conf->epcs_support = false; 4093 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4094 4095 netif_carrier_off(sdata->dev); 4096 4097 /* 4098 * if we want to get out of ps before disassoc (why?) we have 4099 * to do it before sending disassoc, as otherwise the null-packet 4100 * won't be valid. 4101 */ 4102 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4103 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4104 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4105 } 4106 local->ps_sdata = NULL; 4107 4108 /* disable per-vif ps */ 4109 ieee80211_recalc_ps_vif(sdata); 4110 4111 /* make sure ongoing transmission finishes */ 4112 synchronize_net(); 4113 4114 /* 4115 * drop any frame before deauth/disassoc, this can be data or 4116 * management frame. Since we are disconnecting, we should not 4117 * insist sending these frames which can take time and delay 4118 * the disconnection and possible the roaming. 4119 */ 4120 ieee80211_flush_queues(local, sdata, true); 4121 4122 if (tx) { 4123 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4124 4125 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4126 sdata->vif.cfg.ap_addr, stype, 4127 reason, true, frame_buf); 4128 4129 /* flush out frame - make sure the deauth was actually sent */ 4130 ieee80211_flush_queues(local, sdata, false); 4131 4132 drv_mgd_complete_tx(sdata->local, sdata, &info); 4133 } else if (frame_buf) { 4134 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4135 sdata->vif.cfg.ap_addr, stype, 4136 reason, false, frame_buf); 4137 } 4138 4139 /* clear AP addr only after building the needed mgmt frames */ 4140 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4141 eth_zero_addr(sdata->vif.cfg.ap_addr); 4142 4143 sdata->vif.cfg.ssid_len = 0; 4144 4145 /* Remove TDLS peers */ 4146 __sta_info_flush(sdata, false, -1, ap_sta); 4147 4148 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4149 /* Only move the AP state */ 4150 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4151 } else { 4152 /* Remove AP peer */ 4153 sta_info_flush(sdata, -1); 4154 } 4155 4156 /* finally reset all BSS / config parameters */ 4157 if (!ieee80211_vif_is_mld(&sdata->vif)) 4158 changed |= ieee80211_reset_erp_info(sdata); 4159 4160 ieee80211_led_assoc(local, 0); 4161 changed |= BSS_CHANGED_ASSOC; 4162 sdata->vif.cfg.assoc = false; 4163 4164 sdata->deflink.u.mgd.p2p_noa_index = -1; 4165 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4166 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4167 4168 /* on the next assoc, re-program HT/VHT parameters */ 4169 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4170 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4171 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4172 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4173 4174 /* 4175 * reset MU-MIMO ownership and group data in default link, 4176 * if used, other links are destroyed 4177 */ 4178 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4179 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4180 memset(sdata->vif.bss_conf.mu_group.position, 0, 4181 sizeof(sdata->vif.bss_conf.mu_group.position)); 4182 if (!ieee80211_vif_is_mld(&sdata->vif)) 4183 changed |= BSS_CHANGED_MU_GROUPS; 4184 sdata->vif.bss_conf.mu_mimo_owner = false; 4185 4186 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4187 4188 timer_delete_sync(&local->dynamic_ps_timer); 4189 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4190 4191 /* Disable ARP filtering */ 4192 if (sdata->vif.cfg.arp_addr_cnt) 4193 changed |= BSS_CHANGED_ARP_FILTER; 4194 4195 sdata->vif.bss_conf.qos = false; 4196 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4197 changed |= BSS_CHANGED_QOS; 4198 /* The BSSID (not really interesting) and HT changed */ 4199 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4200 ieee80211_bss_info_change_notify(sdata, changed); 4201 } else { 4202 ieee80211_vif_cfg_change_notify(sdata, changed); 4203 } 4204 4205 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4206 /* 4207 * After notifying the driver about the disassoc, 4208 * remove the ap sta. 4209 */ 4210 sta_info_flush(sdata, -1); 4211 } 4212 4213 /* disassociated - set to defaults now */ 4214 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4215 4216 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4217 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4218 timer_delete_sync(&sdata->u.mgd.timer); 4219 4220 sdata->vif.bss_conf.dtim_period = 0; 4221 sdata->vif.bss_conf.beacon_rate = NULL; 4222 4223 sdata->deflink.u.mgd.have_beacon = false; 4224 sdata->deflink.u.mgd.tracking_signal_avg = false; 4225 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4226 4227 ifmgd->flags = 0; 4228 4229 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4230 struct ieee80211_link_data *link; 4231 4232 link = sdata_dereference(sdata->link[link_id], sdata); 4233 if (!link) 4234 continue; 4235 ieee80211_link_release_channel(link); 4236 } 4237 4238 sdata->vif.bss_conf.csa_active = false; 4239 sdata->deflink.u.mgd.csa.blocked_tx = false; 4240 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4241 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4242 ieee80211_vif_unblock_queues_csa(sdata); 4243 4244 /* existing TX TSPEC sessions no longer exist */ 4245 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4246 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4247 4248 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4249 sdata->vif.bss_conf.pwr_reduction = 0; 4250 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4251 4252 sdata->vif.cfg.eml_cap = 0; 4253 sdata->vif.cfg.eml_med_sync_delay = 0; 4254 sdata->vif.cfg.mld_capa_op = 0; 4255 4256 memset(&sdata->u.mgd.ttlm_info, 0, 4257 sizeof(sdata->u.mgd.ttlm_info)); 4258 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4259 4260 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4261 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4262 &ifmgd->neg_ttlm_timeout_work); 4263 4264 sdata->u.mgd.removed_links = 0; 4265 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 4266 &sdata->u.mgd.ml_reconf_work); 4267 4268 wiphy_work_cancel(sdata->local->hw.wiphy, 4269 &ifmgd->teardown_ttlm_work); 4270 4271 /* if disconnection happens in the middle of the ML reconfiguration 4272 * flow, cfg80211 must called to release the BSS references obtained 4273 * when the flow started. 4274 */ 4275 ieee80211_ml_reconf_reset(sdata); 4276 4277 ieee80211_vif_set_links(sdata, 0, 0); 4278 4279 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4280 4281 ifmgd->epcs.enabled = false; 4282 ifmgd->epcs.dialog_token = 0; 4283 4284 memset(ifmgd->userspace_selectors, 0, 4285 sizeof(ifmgd->userspace_selectors)); 4286} 4287 4288static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4289{ 4290 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4291 struct ieee80211_local *local = sdata->local; 4292 4293 lockdep_assert_wiphy(local->hw.wiphy); 4294 4295 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4296 return; 4297 4298 __ieee80211_stop_poll(sdata); 4299 4300 ieee80211_recalc_ps(local); 4301 4302 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4303 return; 4304 4305 /* 4306 * We've received a probe response, but are not sure whether 4307 * we have or will be receiving any beacons or data, so let's 4308 * schedule the timers again, just in case. 4309 */ 4310 ieee80211_sta_reset_beacon_monitor(sdata); 4311 4312 mod_timer(&ifmgd->conn_mon_timer, 4313 round_jiffies_up(jiffies + 4314 IEEE80211_CONNECTION_IDLE_TIME)); 4315} 4316 4317static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4318 struct ieee80211_hdr *hdr, 4319 u16 tx_time) 4320{ 4321 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4322 u16 tid; 4323 int ac; 4324 struct ieee80211_sta_tx_tspec *tx_tspec; 4325 unsigned long now = jiffies; 4326 4327 if (!ieee80211_is_data_qos(hdr->frame_control)) 4328 return; 4329 4330 tid = ieee80211_get_tid(hdr); 4331 ac = ieee80211_ac_from_tid(tid); 4332 tx_tspec = &ifmgd->tx_tspec[ac]; 4333 4334 if (likely(!tx_tspec->admitted_time)) 4335 return; 4336 4337 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4338 tx_tspec->consumed_tx_time = 0; 4339 tx_tspec->time_slice_start = now; 4340 4341 if (tx_tspec->downgraded) { 4342 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4343 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4344 &ifmgd->tx_tspec_wk, 0); 4345 } 4346 } 4347 4348 if (tx_tspec->downgraded) 4349 return; 4350 4351 tx_tspec->consumed_tx_time += tx_time; 4352 4353 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4354 tx_tspec->downgraded = true; 4355 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4356 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4357 &ifmgd->tx_tspec_wk, 0); 4358 } 4359} 4360 4361void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4362 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4363{ 4364 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4365 4366 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4367 !sdata->u.mgd.probe_send_count) 4368 return; 4369 4370 if (ack) 4371 sdata->u.mgd.probe_send_count = 0; 4372 else 4373 sdata->u.mgd.nullfunc_failed = true; 4374 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4375} 4376 4377static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4378 const u8 *src, const u8 *dst, 4379 const u8 *ssid, size_t ssid_len, 4380 struct ieee80211_channel *channel) 4381{ 4382 struct sk_buff *skb; 4383 4384 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4385 ssid, ssid_len, NULL, 0, 4386 IEEE80211_PROBE_FLAG_DIRECTED); 4387 if (skb) 4388 ieee80211_tx_skb(sdata, skb); 4389} 4390 4391static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4392{ 4393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4394 u8 *dst = sdata->vif.cfg.ap_addr; 4395 u8 unicast_limit = max(1, max_probe_tries - 3); 4396 struct sta_info *sta; 4397 4398 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4399 4400 /* 4401 * Try sending broadcast probe requests for the last three 4402 * probe requests after the first ones failed since some 4403 * buggy APs only support broadcast probe requests. 4404 */ 4405 if (ifmgd->probe_send_count >= unicast_limit) 4406 dst = NULL; 4407 4408 /* 4409 * When the hardware reports an accurate Tx ACK status, it's 4410 * better to send a nullfunc frame instead of a probe request, 4411 * as it will kick us off the AP quickly if we aren't associated 4412 * anymore. The timeout will be reset if the frame is ACKed by 4413 * the AP. 4414 */ 4415 ifmgd->probe_send_count++; 4416 4417 if (dst) { 4418 sta = sta_info_get(sdata, dst); 4419 if (!WARN_ON(!sta)) 4420 ieee80211_check_fast_rx(sta); 4421 } 4422 4423 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4424 ifmgd->nullfunc_failed = false; 4425 ieee80211_send_nullfunc(sdata->local, sdata, false); 4426 } else { 4427 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4428 sdata->vif.cfg.ssid, 4429 sdata->vif.cfg.ssid_len, 4430 sdata->deflink.conf->bss->channel); 4431 } 4432 4433 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4434 run_again(sdata, ifmgd->probe_timeout); 4435} 4436 4437static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4438 bool beacon) 4439{ 4440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4441 bool already = false; 4442 4443 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4444 4445 if (!ieee80211_sdata_running(sdata)) 4446 return; 4447 4448 if (!ifmgd->associated) 4449 return; 4450 4451 if (sdata->local->tmp_channel || sdata->local->scanning) 4452 return; 4453 4454 if (sdata->local->suspending) { 4455 /* reschedule after resume */ 4456 ieee80211_reset_ap_probe(sdata); 4457 return; 4458 } 4459 4460 if (beacon) { 4461 mlme_dbg_ratelimited(sdata, 4462 "detected beacon loss from AP (missed %d beacons) - probing\n", 4463 beacon_loss_count); 4464 4465 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4466 } 4467 4468 /* 4469 * The driver/our work has already reported this event or the 4470 * connection monitoring has kicked in and we have already sent 4471 * a probe request. Or maybe the AP died and the driver keeps 4472 * reporting until we disassociate... 4473 * 4474 * In either case we have to ignore the current call to this 4475 * function (except for setting the correct probe reason bit) 4476 * because otherwise we would reset the timer every time and 4477 * never check whether we received a probe response! 4478 */ 4479 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4480 already = true; 4481 4482 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4483 4484 if (already) 4485 return; 4486 4487 ieee80211_recalc_ps(sdata->local); 4488 4489 ifmgd->probe_send_count = 0; 4490 ieee80211_mgd_probe_ap_send(sdata); 4491} 4492 4493struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4494 struct ieee80211_vif *vif) 4495{ 4496 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4497 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4498 struct cfg80211_bss *cbss; 4499 struct sk_buff *skb; 4500 const struct element *ssid; 4501 int ssid_len; 4502 4503 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4504 4505 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4506 ieee80211_vif_is_mld(&sdata->vif))) 4507 return NULL; 4508 4509 if (ifmgd->associated) 4510 cbss = sdata->deflink.conf->bss; 4511 else if (ifmgd->auth_data) 4512 cbss = ifmgd->auth_data->bss; 4513 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4514 cbss = ifmgd->assoc_data->link[0].bss; 4515 else 4516 return NULL; 4517 4518 rcu_read_lock(); 4519 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4520 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4521 "invalid SSID element (len=%d)", 4522 ssid ? ssid->datalen : -1)) 4523 ssid_len = 0; 4524 else 4525 ssid_len = ssid->datalen; 4526 4527 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4528 (u32) -1, cbss->channel, 4529 ssid->data, ssid_len, 4530 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4531 rcu_read_unlock(); 4532 4533 return skb; 4534} 4535EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4536 4537static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4538 const u8 *buf, size_t len, bool tx, 4539 u16 reason, bool reconnect) 4540{ 4541 struct ieee80211_event event = { 4542 .type = MLME_EVENT, 4543 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4544 .u.mlme.reason = reason, 4545 }; 4546 4547 if (tx) 4548 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4549 else 4550 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4551 4552 drv_event_callback(sdata->local, sdata, &event); 4553} 4554 4555static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4556{ 4557 struct ieee80211_local *local = sdata->local; 4558 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4559 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4560 4561 lockdep_assert_wiphy(local->hw.wiphy); 4562 4563 if (!ifmgd->associated) 4564 return; 4565 4566 if (!ifmgd->driver_disconnect) { 4567 unsigned int link_id; 4568 4569 /* 4570 * AP is probably out of range (or not reachable for another 4571 * reason) so remove the bss structs for that AP. In the case 4572 * of multi-link, it's not clear that all of them really are 4573 * out of range, but if they weren't the driver likely would 4574 * have switched to just have a single link active? 4575 */ 4576 for (link_id = 0; 4577 link_id < ARRAY_SIZE(sdata->link); 4578 link_id++) { 4579 struct ieee80211_link_data *link; 4580 4581 link = sdata_dereference(sdata->link[link_id], sdata); 4582 if (!link || !link->conf->bss) 4583 continue; 4584 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4585 link->conf->bss = NULL; 4586 } 4587 } 4588 4589 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4590 ifmgd->driver_disconnect ? 4591 WLAN_REASON_DEAUTH_LEAVING : 4592 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4593 true, frame_buf); 4594 /* the other links will be destroyed */ 4595 sdata->vif.bss_conf.csa_active = false; 4596 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4597 sdata->deflink.u.mgd.csa.blocked_tx = false; 4598 ieee80211_vif_unblock_queues_csa(sdata); 4599 4600 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4601 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4602 ifmgd->reconnect); 4603 ifmgd->reconnect = false; 4604} 4605 4606static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4607 struct wiphy_work *work) 4608{ 4609 struct ieee80211_sub_if_data *sdata = 4610 container_of(work, struct ieee80211_sub_if_data, 4611 u.mgd.beacon_connection_loss_work); 4612 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4613 4614 if (ifmgd->connection_loss) { 4615 sdata_info(sdata, "Connection to AP %pM lost\n", 4616 sdata->vif.cfg.ap_addr); 4617 __ieee80211_disconnect(sdata); 4618 ifmgd->connection_loss = false; 4619 } else if (ifmgd->driver_disconnect) { 4620 sdata_info(sdata, 4621 "Driver requested disconnection from AP %pM\n", 4622 sdata->vif.cfg.ap_addr); 4623 __ieee80211_disconnect(sdata); 4624 ifmgd->driver_disconnect = false; 4625 } else { 4626 if (ifmgd->associated) 4627 sdata->deflink.u.mgd.beacon_loss_count++; 4628 ieee80211_mgd_probe_ap(sdata, true); 4629 } 4630} 4631 4632static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4633 struct wiphy_work *work) 4634{ 4635 struct ieee80211_sub_if_data *sdata = 4636 container_of(work, struct ieee80211_sub_if_data, 4637 u.mgd.csa_connection_drop_work); 4638 4639 __ieee80211_disconnect(sdata); 4640} 4641 4642void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4643{ 4644 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4645 struct ieee80211_hw *hw = &sdata->local->hw; 4646 4647 trace_api_beacon_loss(sdata); 4648 4649 sdata->u.mgd.connection_loss = false; 4650 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4651} 4652EXPORT_SYMBOL(ieee80211_beacon_loss); 4653 4654void ieee80211_connection_loss(struct ieee80211_vif *vif) 4655{ 4656 struct ieee80211_sub_if_data *sdata; 4657 struct ieee80211_hw *hw; 4658 4659 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4660 4661 sdata = vif_to_sdata(vif); 4662 hw = &sdata->local->hw; 4663 4664 trace_api_connection_loss(sdata); 4665 4666 sdata->u.mgd.connection_loss = true; 4667 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4668} 4669EXPORT_SYMBOL(ieee80211_connection_loss); 4670 4671void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4672{ 4673 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4674 struct ieee80211_hw *hw = &sdata->local->hw; 4675 4676 trace_api_disconnect(sdata, reconnect); 4677 4678 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4679 return; 4680 4681 sdata->u.mgd.driver_disconnect = true; 4682 sdata->u.mgd.reconnect = reconnect; 4683 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4684} 4685EXPORT_SYMBOL(ieee80211_disconnect); 4686 4687static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4688 bool assoc) 4689{ 4690 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4691 4692 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4693 4694 sdata->u.mgd.auth_data = NULL; 4695 4696 if (!assoc) { 4697 /* 4698 * we are not authenticated yet, the only timer that could be 4699 * running is the timeout for the authentication response which 4700 * which is not relevant anymore. 4701 */ 4702 timer_delete_sync(&sdata->u.mgd.timer); 4703 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4704 4705 /* other links are destroyed */ 4706 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4707 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4708 BSS_CHANGED_BSSID); 4709 sdata->u.mgd.flags = 0; 4710 4711 ieee80211_link_release_channel(&sdata->deflink); 4712 ieee80211_vif_set_links(sdata, 0, 0); 4713 } 4714 4715 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4716 kfree(auth_data); 4717} 4718 4719enum assoc_status { 4720 ASSOC_SUCCESS, 4721 ASSOC_REJECTED, 4722 ASSOC_TIMEOUT, 4723 ASSOC_ABANDON, 4724}; 4725 4726static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4727 enum assoc_status status) 4728{ 4729 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4730 4731 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4732 4733 sdata->u.mgd.assoc_data = NULL; 4734 4735 if (status != ASSOC_SUCCESS) { 4736 /* 4737 * we are not associated yet, the only timer that could be 4738 * running is the timeout for the association response which 4739 * which is not relevant anymore. 4740 */ 4741 timer_delete_sync(&sdata->u.mgd.timer); 4742 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4743 4744 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4745 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4746 BSS_CHANGED_BSSID); 4747 sdata->u.mgd.flags = 0; 4748 sdata->vif.bss_conf.mu_mimo_owner = false; 4749 4750 if (status != ASSOC_REJECTED) { 4751 struct cfg80211_assoc_failure data = { 4752 .timeout = status == ASSOC_TIMEOUT, 4753 }; 4754 int i; 4755 4756 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4757 ARRAY_SIZE(assoc_data->link)); 4758 4759 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4760 data.bss[i] = assoc_data->link[i].bss; 4761 4762 if (ieee80211_vif_is_mld(&sdata->vif)) 4763 data.ap_mld_addr = assoc_data->ap_addr; 4764 4765 cfg80211_assoc_failure(sdata->dev, &data); 4766 } 4767 4768 ieee80211_link_release_channel(&sdata->deflink); 4769 ieee80211_vif_set_links(sdata, 0, 0); 4770 } 4771 4772 kfree(assoc_data); 4773} 4774 4775static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4776 struct ieee80211_mgmt *mgmt, size_t len) 4777{ 4778 struct ieee80211_local *local = sdata->local; 4779 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4780 const struct element *challenge; 4781 u8 *pos; 4782 u32 tx_flags = 0; 4783 struct ieee80211_prep_tx_info info = { 4784 .subtype = IEEE80211_STYPE_AUTH, 4785 .link_id = auth_data->link_id, 4786 }; 4787 4788 pos = mgmt->u.auth.variable; 4789 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4790 len - (pos - (u8 *)mgmt)); 4791 if (!challenge) 4792 return; 4793 auth_data->expected_transaction = 4; 4794 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4795 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4796 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4797 IEEE80211_TX_INTFL_MLME_CONN_TX; 4798 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4799 (void *)challenge, 4800 challenge->datalen + sizeof(*challenge), 4801 auth_data->ap_addr, auth_data->ap_addr, 4802 auth_data->key, auth_data->key_len, 4803 auth_data->key_idx, tx_flags); 4804} 4805 4806static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4807{ 4808 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4809 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4810 struct sta_info *sta; 4811 4812 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4813 4814 sdata_info(sdata, "authenticated\n"); 4815 ifmgd->auth_data->done = true; 4816 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4817 ifmgd->auth_data->timeout_started = true; 4818 run_again(sdata, ifmgd->auth_data->timeout); 4819 4820 /* move station state to auth */ 4821 sta = sta_info_get(sdata, ap_addr); 4822 if (!sta) { 4823 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4824 return false; 4825 } 4826 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4827 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4828 return false; 4829 } 4830 4831 return true; 4832} 4833 4834static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4835 struct ieee80211_mgmt *mgmt, size_t len) 4836{ 4837 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4838 u16 auth_alg, auth_transaction, status_code; 4839 struct ieee80211_event event = { 4840 .type = MLME_EVENT, 4841 .u.mlme.data = AUTH_EVENT, 4842 }; 4843 struct ieee80211_prep_tx_info info = { 4844 .subtype = IEEE80211_STYPE_AUTH, 4845 }; 4846 bool sae_need_confirm = false; 4847 4848 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4849 4850 if (len < 24 + 6) 4851 return; 4852 4853 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4854 return; 4855 4856 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4857 return; 4858 4859 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4860 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4861 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4862 4863 info.link_id = ifmgd->auth_data->link_id; 4864 4865 if (auth_alg != ifmgd->auth_data->algorithm || 4866 (auth_alg != WLAN_AUTH_SAE && 4867 auth_transaction != ifmgd->auth_data->expected_transaction) || 4868 (auth_alg == WLAN_AUTH_SAE && 4869 (auth_transaction < ifmgd->auth_data->expected_transaction || 4870 auth_transaction > 2))) { 4871 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4872 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4873 auth_transaction, 4874 ifmgd->auth_data->expected_transaction); 4875 goto notify_driver; 4876 } 4877 4878 if (status_code != WLAN_STATUS_SUCCESS) { 4879 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4880 4881 if (auth_alg == WLAN_AUTH_SAE && 4882 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4883 (auth_transaction == 1 && 4884 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4885 status_code == WLAN_STATUS_SAE_PK)))) { 4886 /* waiting for userspace now */ 4887 ifmgd->auth_data->waiting = true; 4888 ifmgd->auth_data->timeout = 4889 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4890 ifmgd->auth_data->timeout_started = true; 4891 run_again(sdata, ifmgd->auth_data->timeout); 4892 if (auth_transaction == 1) 4893 sae_need_confirm = true; 4894 goto notify_driver; 4895 } 4896 4897 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4898 mgmt->sa, status_code); 4899 ieee80211_destroy_auth_data(sdata, false); 4900 event.u.mlme.status = MLME_DENIED; 4901 event.u.mlme.reason = status_code; 4902 drv_event_callback(sdata->local, sdata, &event); 4903 goto notify_driver; 4904 } 4905 4906 switch (ifmgd->auth_data->algorithm) { 4907 case WLAN_AUTH_OPEN: 4908 case WLAN_AUTH_LEAP: 4909 case WLAN_AUTH_FT: 4910 case WLAN_AUTH_SAE: 4911 case WLAN_AUTH_FILS_SK: 4912 case WLAN_AUTH_FILS_SK_PFS: 4913 case WLAN_AUTH_FILS_PK: 4914 break; 4915 case WLAN_AUTH_SHARED_KEY: 4916 if (ifmgd->auth_data->expected_transaction != 4) { 4917 ieee80211_auth_challenge(sdata, mgmt, len); 4918 /* need another frame */ 4919 return; 4920 } 4921 break; 4922 default: 4923 WARN_ONCE(1, "invalid auth alg %d", 4924 ifmgd->auth_data->algorithm); 4925 goto notify_driver; 4926 } 4927 4928 event.u.mlme.status = MLME_SUCCESS; 4929 info.success = 1; 4930 drv_event_callback(sdata->local, sdata, &event); 4931 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4932 (auth_transaction == 2 && 4933 ifmgd->auth_data->expected_transaction == 2)) { 4934 if (!ieee80211_mark_sta_auth(sdata)) 4935 return; /* ignore frame -- wait for timeout */ 4936 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4937 auth_transaction == 1) { 4938 sae_need_confirm = true; 4939 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4940 auth_transaction == 2) { 4941 sdata_info(sdata, "SAE peer confirmed\n"); 4942 ifmgd->auth_data->peer_confirmed = true; 4943 } 4944 4945 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4946notify_driver: 4947 if (!sae_need_confirm) 4948 drv_mgd_complete_tx(sdata->local, sdata, &info); 4949} 4950 4951#define case_WLAN(type) \ 4952 case WLAN_REASON_##type: return #type 4953 4954const char *ieee80211_get_reason_code_string(u16 reason_code) 4955{ 4956 switch (reason_code) { 4957 case_WLAN(UNSPECIFIED); 4958 case_WLAN(PREV_AUTH_NOT_VALID); 4959 case_WLAN(DEAUTH_LEAVING); 4960 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4961 case_WLAN(DISASSOC_AP_BUSY); 4962 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4963 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4964 case_WLAN(DISASSOC_STA_HAS_LEFT); 4965 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4966 case_WLAN(DISASSOC_BAD_POWER); 4967 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4968 case_WLAN(INVALID_IE); 4969 case_WLAN(MIC_FAILURE); 4970 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4971 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4972 case_WLAN(IE_DIFFERENT); 4973 case_WLAN(INVALID_GROUP_CIPHER); 4974 case_WLAN(INVALID_PAIRWISE_CIPHER); 4975 case_WLAN(INVALID_AKMP); 4976 case_WLAN(UNSUPP_RSN_VERSION); 4977 case_WLAN(INVALID_RSN_IE_CAP); 4978 case_WLAN(IEEE8021X_FAILED); 4979 case_WLAN(CIPHER_SUITE_REJECTED); 4980 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4981 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4982 case_WLAN(DISASSOC_LOW_ACK); 4983 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4984 case_WLAN(QSTA_LEAVE_QBSS); 4985 case_WLAN(QSTA_NOT_USE); 4986 case_WLAN(QSTA_REQUIRE_SETUP); 4987 case_WLAN(QSTA_TIMEOUT); 4988 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4989 case_WLAN(MESH_PEER_CANCELED); 4990 case_WLAN(MESH_MAX_PEERS); 4991 case_WLAN(MESH_CONFIG); 4992 case_WLAN(MESH_CLOSE); 4993 case_WLAN(MESH_MAX_RETRIES); 4994 case_WLAN(MESH_CONFIRM_TIMEOUT); 4995 case_WLAN(MESH_INVALID_GTK); 4996 case_WLAN(MESH_INCONSISTENT_PARAM); 4997 case_WLAN(MESH_INVALID_SECURITY); 4998 case_WLAN(MESH_PATH_ERROR); 4999 case_WLAN(MESH_PATH_NOFORWARD); 5000 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 5001 case_WLAN(MAC_EXISTS_IN_MBSS); 5002 case_WLAN(MESH_CHAN_REGULATORY); 5003 case_WLAN(MESH_CHAN); 5004 default: return "<unknown>"; 5005 } 5006} 5007 5008static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5009 struct ieee80211_mgmt *mgmt, size_t len) 5010{ 5011 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5012 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5013 5014 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5015 5016 if (len < 24 + 2) 5017 return; 5018 5019 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5020 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5021 return; 5022 } 5023 5024 if (ifmgd->associated && 5025 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5026 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5027 sdata->vif.cfg.ap_addr, reason_code, 5028 ieee80211_get_reason_code_string(reason_code)); 5029 5030 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5031 5032 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5033 reason_code, false); 5034 return; 5035 } 5036 5037 if (ifmgd->assoc_data && 5038 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5039 sdata_info(sdata, 5040 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5041 ifmgd->assoc_data->ap_addr, reason_code, 5042 ieee80211_get_reason_code_string(reason_code)); 5043 5044 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5045 5046 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5047 return; 5048 } 5049} 5050 5051 5052static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5053 struct ieee80211_mgmt *mgmt, size_t len) 5054{ 5055 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5056 u16 reason_code; 5057 5058 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5059 5060 if (len < 24 + 2) 5061 return; 5062 5063 if (!ifmgd->associated || 5064 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5065 return; 5066 5067 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5068 5069 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5070 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5071 return; 5072 } 5073 5074 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5075 sdata->vif.cfg.ap_addr, reason_code, 5076 ieee80211_get_reason_code_string(reason_code)); 5077 5078 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5079 5080 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5081 false); 5082} 5083 5084static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5085 struct ieee80211_supported_band *sband, 5086 const struct link_sta_info *link_sta, 5087 const struct ieee802_11_elems *elems) 5088{ 5089 const struct ieee80211_sta_he_cap *own_he_cap = 5090 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5091 5092 if (elems->ext_capab_len < 10) 5093 return false; 5094 5095 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5096 return false; 5097 5098 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5099 IEEE80211_HE_MAC_CAP0_TWT_RES && 5100 own_he_cap && 5101 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5102 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5103} 5104 5105static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5106 struct ieee80211_supported_band *sband, 5107 struct ieee80211_link_data *link, 5108 struct link_sta_info *link_sta, 5109 struct ieee802_11_elems *elems) 5110{ 5111 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5112 5113 if (link->conf->twt_requester != twt) { 5114 link->conf->twt_requester = twt; 5115 return BSS_CHANGED_TWT; 5116 } 5117 return 0; 5118} 5119 5120static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5121 struct ieee80211_bss_conf *bss_conf, 5122 struct ieee80211_supported_band *sband, 5123 struct link_sta_info *link_sta) 5124{ 5125 const struct ieee80211_sta_he_cap *own_he_cap = 5126 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5127 5128 return bss_conf->he_support && 5129 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5130 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5131 own_he_cap && 5132 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5133 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5134} 5135 5136static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5137 bool enabled) 5138{ 5139 /* in any case this is called, dialog token should be reset */ 5140 sdata->u.mgd.epcs.dialog_token = 0; 5141 5142 if (sdata->u.mgd.epcs.enabled == enabled) 5143 return; 5144 5145 sdata->u.mgd.epcs.enabled = enabled; 5146 cfg80211_epcs_changed(sdata->dev, enabled); 5147} 5148 5149static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5150{ 5151 struct ieee80211_local *local = sdata->local; 5152 u8 link_id; 5153 5154 if (!sdata->u.mgd.epcs.enabled) 5155 return; 5156 5157 lockdep_assert_wiphy(local->hw.wiphy); 5158 5159 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5160 struct ieee802_11_elems *elems; 5161 struct ieee80211_link_data *link; 5162 const struct cfg80211_bss_ies *ies; 5163 bool ret; 5164 5165 rcu_read_lock(); 5166 5167 link = sdata_dereference(sdata->link[link_id], sdata); 5168 if (!link || !link->conf || !link->conf->bss) { 5169 rcu_read_unlock(); 5170 continue; 5171 } 5172 5173 if (link->u.mgd.disable_wmm_tracking) { 5174 rcu_read_unlock(); 5175 ieee80211_set_wmm_default(link, false, false); 5176 continue; 5177 } 5178 5179 ies = rcu_dereference(link->conf->bss->beacon_ies); 5180 if (!ies) { 5181 rcu_read_unlock(); 5182 ieee80211_set_wmm_default(link, false, false); 5183 continue; 5184 } 5185 5186 elems = ieee802_11_parse_elems(ies->data, ies->len, 5187 IEEE80211_FTYPE_MGMT | 5188 IEEE80211_STYPE_BEACON, 5189 NULL); 5190 if (!elems) { 5191 rcu_read_unlock(); 5192 ieee80211_set_wmm_default(link, false, false); 5193 continue; 5194 } 5195 5196 ret = _ieee80211_sta_wmm_params(local, link, 5197 elems->wmm_param, 5198 elems->wmm_param_len, 5199 elems->mu_edca_param_set); 5200 5201 kfree(elems); 5202 rcu_read_unlock(); 5203 5204 if (!ret) { 5205 ieee80211_set_wmm_default(link, false, false); 5206 continue; 5207 } 5208 5209 ieee80211_mgd_set_link_qos_params(link); 5210 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5211 } 5212} 5213 5214static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5215 struct link_sta_info *link_sta, 5216 struct cfg80211_bss *cbss, 5217 struct ieee80211_mgmt *mgmt, 5218 const u8 *elem_start, 5219 unsigned int elem_len, 5220 u64 *changed) 5221{ 5222 struct ieee80211_sub_if_data *sdata = link->sdata; 5223 struct ieee80211_mgd_assoc_data *assoc_data = 5224 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5225 struct ieee80211_bss_conf *bss_conf = link->conf; 5226 struct ieee80211_local *local = sdata->local; 5227 unsigned int link_id = link->link_id; 5228 struct ieee80211_elems_parse_params parse_params = { 5229 .mode = link->u.mgd.conn.mode, 5230 .start = elem_start, 5231 .len = elem_len, 5232 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5233 .from_ap = true, 5234 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5235 }; 5236 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5237 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5238 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5239 const struct cfg80211_bss_ies *bss_ies = NULL; 5240 struct ieee80211_supported_band *sband; 5241 struct ieee802_11_elems *elems; 5242 const __le16 prof_bss_param_ch_present = 5243 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5244 u16 capab_info; 5245 bool ret; 5246 5247 elems = ieee802_11_parse_elems_full(&parse_params); 5248 if (!elems) 5249 return false; 5250 5251 if (link_id == assoc_data->assoc_link_id) { 5252 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5253 5254 /* 5255 * we should not get to this flow unless the association was 5256 * successful, so set the status directly to success 5257 */ 5258 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5259 if (elems->ml_basic) { 5260 int bss_param_ch_cnt = 5261 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5262 5263 if (bss_param_ch_cnt < 0) { 5264 ret = false; 5265 goto out; 5266 } 5267 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5268 bss_conf->bss_param_ch_cnt_link_id = link_id; 5269 } 5270 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5271 !elems->prof || 5272 !(elems->prof->control & prof_bss_param_ch_present)) { 5273 ret = false; 5274 goto out; 5275 } else { 5276 const u8 *ptr = elems->prof->variable + 5277 elems->prof->sta_info_len - 1; 5278 int bss_param_ch_cnt; 5279 5280 /* 5281 * During parsing, we validated that these fields exist, 5282 * otherwise elems->prof would have been set to NULL. 5283 */ 5284 capab_info = get_unaligned_le16(ptr); 5285 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5286 bss_param_ch_cnt = 5287 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5288 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5289 bss_conf->bss_param_ch_cnt_link_id = link_id; 5290 5291 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5292 link_info(link, "association response status code=%u\n", 5293 assoc_data->link[link_id].status); 5294 ret = true; 5295 goto out; 5296 } 5297 } 5298 5299 if (!is_s1g && !elems->supp_rates) { 5300 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5301 ret = false; 5302 goto out; 5303 } 5304 5305 link->u.mgd.tdls_chan_switch_prohibited = 5306 elems->ext_capab && elems->ext_capab_len >= 5 && 5307 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5308 5309 /* 5310 * Some APs are erroneously not including some information in their 5311 * (re)association response frames. Try to recover by using the data 5312 * from the beacon or probe response. This seems to afflict mobile 5313 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5314 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5315 */ 5316 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5317 ((assoc_data->wmm && !elems->wmm_param) || 5318 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5319 (!elems->ht_cap_elem || !elems->ht_operation)) || 5320 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5321 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5322 const struct cfg80211_bss_ies *ies; 5323 struct ieee802_11_elems *bss_elems; 5324 5325 rcu_read_lock(); 5326 ies = rcu_dereference(cbss->ies); 5327 if (ies) 5328 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5329 GFP_ATOMIC); 5330 rcu_read_unlock(); 5331 if (!bss_ies) { 5332 ret = false; 5333 goto out; 5334 } 5335 5336 parse_params.start = bss_ies->data; 5337 parse_params.len = bss_ies->len; 5338 parse_params.bss = cbss; 5339 parse_params.link_id = -1; 5340 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5341 if (!bss_elems) { 5342 ret = false; 5343 goto out; 5344 } 5345 5346 if (assoc_data->wmm && 5347 !elems->wmm_param && bss_elems->wmm_param) { 5348 elems->wmm_param = bss_elems->wmm_param; 5349 sdata_info(sdata, 5350 "AP bug: WMM param missing from AssocResp\n"); 5351 } 5352 5353 /* 5354 * Also check if we requested HT/VHT, otherwise the AP doesn't 5355 * have to include the IEs in the (re)association response. 5356 */ 5357 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5358 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5359 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5360 sdata_info(sdata, 5361 "AP bug: HT capability missing from AssocResp\n"); 5362 } 5363 if (!elems->ht_operation && bss_elems->ht_operation && 5364 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5365 elems->ht_operation = bss_elems->ht_operation; 5366 sdata_info(sdata, 5367 "AP bug: HT operation missing from AssocResp\n"); 5368 } 5369 5370 if (is_5ghz) { 5371 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5372 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5373 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5374 sdata_info(sdata, 5375 "AP bug: VHT capa missing from AssocResp\n"); 5376 } 5377 5378 if (!elems->vht_operation && bss_elems->vht_operation && 5379 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5380 elems->vht_operation = bss_elems->vht_operation; 5381 sdata_info(sdata, 5382 "AP bug: VHT operation missing from AssocResp\n"); 5383 } 5384 } 5385 kfree(bss_elems); 5386 } 5387 5388 /* 5389 * We previously checked these in the beacon/probe response, so 5390 * they should be present here. This is just a safety net. 5391 * Note that the ieee80211_config_bw() below would also check 5392 * for this (and more), but this has better error reporting. 5393 */ 5394 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5395 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5396 sdata_info(sdata, 5397 "HT AP is missing WMM params or HT capability/operation\n"); 5398 ret = false; 5399 goto out; 5400 } 5401 5402 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5403 (!elems->vht_cap_elem || !elems->vht_operation)) { 5404 sdata_info(sdata, 5405 "VHT AP is missing VHT capability/operation\n"); 5406 ret = false; 5407 goto out; 5408 } 5409 5410 /* check/update if AP changed anything in assoc response vs. scan */ 5411 if (ieee80211_config_bw(link, elems, 5412 link_id == assoc_data->assoc_link_id, 5413 changed, 5414 le16_to_cpu(mgmt->frame_control) & 5415 IEEE80211_FCTL_STYPE)) { 5416 ret = false; 5417 goto out; 5418 } 5419 5420 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5421 ret = false; 5422 goto out; 5423 } 5424 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5425 5426 /* Set up internal HT/VHT capabilities */ 5427 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5428 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5429 elems->ht_cap_elem, 5430 link_sta); 5431 5432 if (elems->vht_cap_elem && 5433 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5434 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5435 const struct cfg80211_bss_ies *ies; 5436 5437 /* 5438 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5439 * too large maximum MPDU length in the association response 5440 * (indicating 12k) that it cannot actually process ... 5441 * Work around that. 5442 */ 5443 rcu_read_lock(); 5444 ies = rcu_dereference(cbss->ies); 5445 if (ies) { 5446 const struct element *elem; 5447 5448 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5449 ies->data, ies->len); 5450 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5451 bss_vht_cap = (const void *)elem->data; 5452 } 5453 5454 if (ieee80211_hw_check(&local->hw, STRICT) && 5455 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5456 sizeof(*bss_vht_cap)))) { 5457 rcu_read_unlock(); 5458 ret = false; 5459 link_info(link, "VHT capabilities mismatch\n"); 5460 goto out; 5461 } 5462 5463 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5464 elems->vht_cap_elem, 5465 bss_vht_cap, link_sta); 5466 rcu_read_unlock(); 5467 } 5468 5469 if (elems->he_operation && 5470 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5471 elems->he_cap) { 5472 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5473 elems->he_cap, 5474 elems->he_cap_len, 5475 elems->he_6ghz_capa, 5476 link_sta); 5477 5478 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5479 if (elems->rsnx && elems->rsnx_len && 5480 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5481 wiphy_ext_feature_isset(local->hw.wiphy, 5482 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5483 bss_conf->twt_protected = true; 5484 else 5485 bss_conf->twt_protected = false; 5486 5487 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5488 link_sta, elems); 5489 5490 if (elems->eht_operation && elems->eht_cap && 5491 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5492 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5493 elems->he_cap, 5494 elems->he_cap_len, 5495 elems->eht_cap, 5496 elems->eht_cap_len, 5497 link_sta); 5498 5499 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5500 bss_conf->epcs_support = bss_conf->eht_support && 5501 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5502 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5503 5504 /* EPCS might be already enabled but a new added link 5505 * does not support EPCS. This should not really happen 5506 * in practice. 5507 */ 5508 if (sdata->u.mgd.epcs.enabled && 5509 !bss_conf->epcs_support) 5510 ieee80211_epcs_teardown(sdata); 5511 } else { 5512 bss_conf->eht_support = false; 5513 bss_conf->epcs_support = false; 5514 } 5515 } else { 5516 bss_conf->he_support = false; 5517 bss_conf->twt_requester = false; 5518 bss_conf->twt_protected = false; 5519 bss_conf->eht_support = false; 5520 bss_conf->epcs_support = false; 5521 } 5522 5523 if (elems->s1g_oper && 5524 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5525 elems->s1g_capab) 5526 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5527 link_sta); 5528 5529 bss_conf->twt_broadcast = 5530 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5531 5532 if (bss_conf->he_support) { 5533 bss_conf->he_bss_color.color = 5534 le32_get_bits(elems->he_operation->he_oper_params, 5535 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5536 bss_conf->he_bss_color.partial = 5537 le32_get_bits(elems->he_operation->he_oper_params, 5538 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5539 bss_conf->he_bss_color.enabled = 5540 !le32_get_bits(elems->he_operation->he_oper_params, 5541 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5542 5543 if (bss_conf->he_bss_color.enabled) 5544 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5545 5546 bss_conf->htc_trig_based_pkt_ext = 5547 le32_get_bits(elems->he_operation->he_oper_params, 5548 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5549 bss_conf->frame_time_rts_th = 5550 le32_get_bits(elems->he_operation->he_oper_params, 5551 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5552 5553 bss_conf->uora_exists = !!elems->uora_element; 5554 if (elems->uora_element) 5555 bss_conf->uora_ocw_range = elems->uora_element[0]; 5556 5557 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5558 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5559 /* TODO: OPEN: what happens if BSS color disable is set? */ 5560 } 5561 5562 if (cbss->transmitted_bss) { 5563 bss_conf->nontransmitted = true; 5564 ether_addr_copy(bss_conf->transmitter_bssid, 5565 cbss->transmitted_bss->bssid); 5566 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5567 bss_conf->bssid_index = cbss->bssid_index; 5568 } 5569 5570 /* 5571 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5572 * in their association response, so ignore that data for our own 5573 * configuration. If it changed since the last beacon, we'll get the 5574 * next beacon and update then. 5575 */ 5576 5577 /* 5578 * If an operating mode notification IE is present, override the 5579 * NSS calculation (that would be done in rate_control_rate_init()) 5580 * and use the # of streams from that element. 5581 */ 5582 if (elems->opmode_notif && 5583 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5584 u8 nss; 5585 5586 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5587 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5588 nss += 1; 5589 link_sta->pub->rx_nss = nss; 5590 } 5591 5592 /* 5593 * Always handle WMM once after association regardless 5594 * of the first value the AP uses. Setting -1 here has 5595 * that effect because the AP values is an unsigned 5596 * 4-bit value. 5597 */ 5598 link->u.mgd.wmm_last_param_set = -1; 5599 link->u.mgd.mu_edca_last_param_set = -1; 5600 5601 if (link->u.mgd.disable_wmm_tracking) { 5602 ieee80211_set_wmm_default(link, false, false); 5603 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5604 elems->wmm_param_len, 5605 elems->mu_edca_param_set)) { 5606 /* still enable QoS since we might have HT/VHT */ 5607 ieee80211_set_wmm_default(link, false, true); 5608 /* disable WMM tracking in this case to disable 5609 * tracking WMM parameter changes in the beacon if 5610 * the parameters weren't actually valid. Doing so 5611 * avoids changing parameters very strangely when 5612 * the AP is going back and forth between valid and 5613 * invalid parameters. 5614 */ 5615 link->u.mgd.disable_wmm_tracking = true; 5616 } 5617 5618 if (elems->max_idle_period_ie) { 5619 bss_conf->max_idle_period = 5620 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5621 bss_conf->protected_keep_alive = 5622 !!(elems->max_idle_period_ie->idle_options & 5623 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5624 *changed |= BSS_CHANGED_KEEP_ALIVE; 5625 } else { 5626 bss_conf->max_idle_period = 0; 5627 bss_conf->protected_keep_alive = false; 5628 } 5629 5630 /* set assoc capability (AID was already set earlier), 5631 * ieee80211_set_associated() will tell the driver */ 5632 bss_conf->assoc_capability = capab_info; 5633 5634 ret = true; 5635out: 5636 kfree(elems); 5637 kfree(bss_ies); 5638 return ret; 5639} 5640 5641static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5642 struct sta_info *sta, 5643 struct link_sta_info *link_sta, 5644 struct cfg80211_bss *cbss) 5645{ 5646 struct ieee80211_sub_if_data *sdata = link->sdata; 5647 struct ieee80211_local *local = sdata->local; 5648 struct ieee80211_bss *bss = (void *)cbss->priv; 5649 u32 rates = 0, basic_rates = 0; 5650 bool have_higher_than_11mbit = false; 5651 int min_rate = INT_MAX, min_rate_index = -1; 5652 struct ieee80211_supported_band *sband; 5653 5654 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5655 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5656 5657 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5658 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5659 ieee80211_s1g_sta_rate_init(sta); 5660 return 0; 5661 } 5662 5663 sband = local->hw.wiphy->bands[cbss->channel->band]; 5664 5665 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5666 NULL, 0, 5667 &rates, &basic_rates, NULL, 5668 &have_higher_than_11mbit, 5669 &min_rate, &min_rate_index); 5670 5671 /* 5672 * This used to be a workaround for basic rates missing 5673 * in the association response frame. Now that we no 5674 * longer use the basic rates from there, it probably 5675 * doesn't happen any more, but keep the workaround so 5676 * in case some *other* APs are buggy in different ways 5677 * we can connect -- with a warning. 5678 * Allow this workaround only in case the AP provided at least 5679 * one rate. 5680 */ 5681 if (min_rate_index < 0) { 5682 link_info(link, "No legacy rates in association response\n"); 5683 return -EINVAL; 5684 } else if (!basic_rates) { 5685 link_info(link, "No basic rates, using min rate instead\n"); 5686 basic_rates = BIT(min_rate_index); 5687 } 5688 5689 if (rates) 5690 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5691 else 5692 link_info(link, "No rates found, keeping mandatory only\n"); 5693 5694 link->conf->basic_rates = basic_rates; 5695 5696 /* cf. IEEE 802.11 9.2.12 */ 5697 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5698 have_higher_than_11mbit; 5699 5700 return 0; 5701} 5702 5703static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5704 struct cfg80211_bss *cbss) 5705{ 5706 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5707 const struct element *ht_cap_elem, *vht_cap_elem; 5708 const struct cfg80211_bss_ies *ies; 5709 const struct ieee80211_ht_cap *ht_cap; 5710 const struct ieee80211_vht_cap *vht_cap; 5711 const struct ieee80211_he_cap_elem *he_cap; 5712 const struct element *he_cap_elem; 5713 u16 mcs_80_map, mcs_160_map; 5714 int i, mcs_nss_size; 5715 bool support_160; 5716 u8 chains = 1; 5717 5718 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5719 return chains; 5720 5721 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5722 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5723 ht_cap = (void *)ht_cap_elem->data; 5724 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5725 /* 5726 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5727 * "Tx Unequal Modulation Supported" fields. 5728 */ 5729 } 5730 5731 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5732 return chains; 5733 5734 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5735 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5736 u8 nss; 5737 u16 tx_mcs_map; 5738 5739 vht_cap = (void *)vht_cap_elem->data; 5740 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5741 for (nss = 8; nss > 0; nss--) { 5742 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5743 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5744 break; 5745 } 5746 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5747 chains = max(chains, nss); 5748 } 5749 5750 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5751 return chains; 5752 5753 ies = rcu_dereference(cbss->ies); 5754 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5755 ies->data, ies->len); 5756 5757 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5758 return chains; 5759 5760 /* skip one byte ext_tag_id */ 5761 he_cap = (void *)(he_cap_elem->data + 1); 5762 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5763 5764 /* invalid HE IE */ 5765 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5766 return chains; 5767 5768 /* mcs_nss is right after he_cap info */ 5769 he_mcs_nss_supp = (void *)(he_cap + 1); 5770 5771 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5772 5773 for (i = 7; i >= 0; i--) { 5774 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5775 5776 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5777 chains = max_t(u8, chains, i + 1); 5778 break; 5779 } 5780 } 5781 5782 support_160 = he_cap->phy_cap_info[0] & 5783 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5784 5785 if (!support_160) 5786 return chains; 5787 5788 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5789 for (i = 7; i >= 0; i--) { 5790 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5791 5792 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5793 chains = max_t(u8, chains, i + 1); 5794 break; 5795 } 5796 } 5797 5798 return chains; 5799} 5800 5801static void 5802ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5803 struct ieee80211_supported_band *sband, 5804 struct cfg80211_assoc_request *req, 5805 bool wmm_used, int link_id, 5806 struct ieee80211_conn_settings *conn) 5807{ 5808 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5809 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5810 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5811 const struct ieee80211_sta_he_cap *he_cap; 5812 const struct ieee80211_sta_eht_cap *eht_cap; 5813 struct ieee80211_sta_vht_cap vht_cap; 5814 5815 if (sband->band == NL80211_BAND_S1GHZ) { 5816 conn->mode = IEEE80211_CONN_MODE_S1G; 5817 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5818 mlme_dbg(sdata, "operating as S1G STA\n"); 5819 return; 5820 } 5821 5822 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5823 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5824 5825 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5826 5827 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5828 mlme_link_id_dbg(sdata, link_id, 5829 "HT disabled by flag, limiting to legacy\n"); 5830 goto out; 5831 } 5832 5833 if (!wmm_used) { 5834 mlme_link_id_dbg(sdata, link_id, 5835 "WMM/QoS not supported, limiting to legacy\n"); 5836 goto out; 5837 } 5838 5839 if (req) { 5840 unsigned int i; 5841 5842 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5843 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5844 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5845 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5846 netdev_info(sdata->dev, 5847 "WEP/TKIP use, limiting to legacy\n"); 5848 goto out; 5849 } 5850 } 5851 } 5852 5853 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5854 mlme_link_id_dbg(sdata, link_id, 5855 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5856 goto out; 5857 } 5858 5859 /* HT is fine */ 5860 conn->mode = IEEE80211_CONN_MODE_HT; 5861 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5862 IEEE80211_CONN_BW_LIMIT_40 : 5863 IEEE80211_CONN_BW_LIMIT_20; 5864 5865 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5866 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5867 5868 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5869 mlme_link_id_dbg(sdata, link_id, 5870 "VHT disabled by flag, limiting to HT\n"); 5871 goto out; 5872 } 5873 5874 if (vht_cap.vht_supported && is_5ghz) { 5875 bool have_80mhz = false; 5876 unsigned int i; 5877 5878 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5879 mlme_link_id_dbg(sdata, link_id, 5880 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5881 goto out; 5882 } 5883 5884 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5885 for (i = 0; i < sband->n_channels; i++) { 5886 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5887 IEEE80211_CHAN_NO_80MHZ)) 5888 continue; 5889 5890 have_80mhz = true; 5891 break; 5892 } 5893 5894 if (!have_80mhz) { 5895 mlme_link_id_dbg(sdata, link_id, 5896 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5897 goto out; 5898 } 5899 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5900 mlme_link_id_dbg(sdata, link_id, 5901 "no VHT support on 5 GHz, limiting to HT\n"); 5902 goto out; 5903 } 5904 5905 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5906 if (sband->band != NL80211_BAND_2GHZ) { 5907 conn->mode = IEEE80211_CONN_MODE_VHT; 5908 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5909 } 5910 5911 if (is_5ghz && 5912 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5913 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5914 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5915 mlme_link_id_dbg(sdata, link_id, 5916 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5917 } 5918 5919 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5920 mlme_link_id_dbg(sdata, link_id, 5921 "HE disabled by flag, limiting to HT/VHT\n"); 5922 goto out; 5923 } 5924 5925 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5926 if (!he_cap) { 5927 WARN_ON(is_6ghz); 5928 mlme_link_id_dbg(sdata, link_id, 5929 "no HE support, limiting to HT/VHT\n"); 5930 goto out; 5931 } 5932 5933 /* so we have HE */ 5934 conn->mode = IEEE80211_CONN_MODE_HE; 5935 5936 /* check bandwidth */ 5937 switch (sband->band) { 5938 default: 5939 case NL80211_BAND_2GHZ: 5940 if (he_cap->he_cap_elem.phy_cap_info[0] & 5941 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5942 break; 5943 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5944 mlme_link_id_dbg(sdata, link_id, 5945 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5946 break; 5947 case NL80211_BAND_5GHZ: 5948 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5949 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5950 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5951 mlme_link_id_dbg(sdata, link_id, 5952 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5953 break; 5954 } 5955 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5956 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5957 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5958 conn->bw_limit, 5959 IEEE80211_CONN_BW_LIMIT_80); 5960 mlme_link_id_dbg(sdata, link_id, 5961 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5962 } 5963 break; 5964 case NL80211_BAND_6GHZ: 5965 if (he_cap->he_cap_elem.phy_cap_info[0] & 5966 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5967 break; 5968 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5969 conn->bw_limit, 5970 IEEE80211_CONN_BW_LIMIT_80); 5971 mlme_link_id_dbg(sdata, link_id, 5972 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5973 break; 5974 } 5975 5976 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5977 mlme_link_id_dbg(sdata, link_id, 5978 "EHT disabled by flag, limiting to HE\n"); 5979 goto out; 5980 } 5981 5982 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5983 if (!eht_cap) { 5984 mlme_link_id_dbg(sdata, link_id, 5985 "no EHT support, limiting to HE\n"); 5986 goto out; 5987 } 5988 5989 /* we have EHT */ 5990 5991 conn->mode = IEEE80211_CONN_MODE_EHT; 5992 5993 /* check bandwidth */ 5994 if (is_6ghz && 5995 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5996 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5997 else if (is_6ghz) 5998 mlme_link_id_dbg(sdata, link_id, 5999 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 6000 6001out: 6002 mlme_link_id_dbg(sdata, link_id, 6003 "determined local STA to be %s, BW limited to %d MHz\n", 6004 ieee80211_conn_mode_str(conn->mode), 6005 20 * (1 << conn->bw_limit)); 6006} 6007 6008static void 6009ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6010 struct ieee80211_supported_band *sband, 6011 struct cfg80211_auth_request *req, 6012 bool wmm_used, 6013 struct ieee80211_conn_settings *conn) 6014{ 6015 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6016 req->link_id > 0 ? req->link_id : 0, 6017 conn); 6018} 6019 6020static void 6021ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6022 struct ieee80211_supported_band *sband, 6023 struct cfg80211_assoc_request *req, 6024 bool wmm_used, int link_id, 6025 struct ieee80211_conn_settings *conn) 6026{ 6027 struct ieee80211_conn_settings tmp; 6028 6029 WARN_ON(!req); 6030 6031 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6032 &tmp); 6033 6034 conn->mode = min_t(enum ieee80211_conn_mode, 6035 conn->mode, tmp.mode); 6036 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6037 conn->bw_limit, tmp.bw_limit); 6038} 6039 6040static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6041 struct ieee80211_link_data *link, 6042 int link_id, 6043 struct cfg80211_bss *cbss, bool mlo, 6044 struct ieee80211_conn_settings *conn, 6045 unsigned long *userspace_selectors) 6046{ 6047 struct ieee80211_local *local = sdata->local; 6048 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6049 struct ieee80211_chan_req chanreq = {}; 6050 struct cfg80211_chan_def ap_chandef; 6051 struct ieee802_11_elems *elems; 6052 int ret; 6053 6054 lockdep_assert_wiphy(local->hw.wiphy); 6055 6056 rcu_read_lock(); 6057 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6058 &chanreq, &ap_chandef, 6059 userspace_selectors); 6060 6061 if (IS_ERR(elems)) { 6062 rcu_read_unlock(); 6063 return PTR_ERR(elems); 6064 } 6065 6066 if (mlo && !elems->ml_basic) { 6067 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6068 rcu_read_unlock(); 6069 kfree(elems); 6070 return -EINVAL; 6071 } 6072 6073 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6074 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6075 6076 if (elems->pwr_constr_elem) 6077 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6078 6079 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6080 if (he_6ghz_oper) 6081 link->conf->power_type = 6082 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6083 cbss->channel->flags); 6084 else 6085 link_info(link, 6086 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6087 cbss->channel->center_freq); 6088 6089 link->conf->tpe = elems->tpe; 6090 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6091 &chanreq.oper); 6092 } 6093 rcu_read_unlock(); 6094 /* the element data was RCU protected so no longer valid anyway */ 6095 kfree(elems); 6096 elems = NULL; 6097 6098 if (!link) 6099 return 0; 6100 6101 rcu_read_lock(); 6102 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6103 local->rx_chains); 6104 rcu_read_unlock(); 6105 6106 /* 6107 * If this fails (possibly due to channel context sharing 6108 * on incompatible channels, e.g. 80+80 and 160 sharing the 6109 * same control channel) try to use a smaller bandwidth. 6110 */ 6111 ret = ieee80211_link_use_channel(link, &chanreq, 6112 IEEE80211_CHANCTX_SHARED); 6113 6114 /* don't downgrade for 5/10/S1G MHz channels, though. */ 6115 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6116 chanreq.oper.width == NL80211_CHAN_WIDTH_10 || 6117 cfg80211_chandef_is_s1g(&chanreq.oper)) 6118 return ret; 6119 6120 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6121 ieee80211_chanreq_downgrade(&chanreq, conn); 6122 6123 ret = ieee80211_link_use_channel(link, &chanreq, 6124 IEEE80211_CHANCTX_SHARED); 6125 } 6126 6127 return ret; 6128} 6129 6130static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6131 u8 *dtim_count, u8 *dtim_period) 6132{ 6133 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6134 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6135 ies->len); 6136 const struct ieee80211_tim_ie *tim = NULL; 6137 const struct ieee80211_bssid_index *idx; 6138 bool valid = tim_ie && tim_ie[1] >= 2; 6139 6140 if (valid) 6141 tim = (void *)(tim_ie + 2); 6142 6143 if (dtim_count) 6144 *dtim_count = valid ? tim->dtim_count : 0; 6145 6146 if (dtim_period) 6147 *dtim_period = valid ? tim->dtim_period : 0; 6148 6149 /* Check if value is overridden by non-transmitted profile */ 6150 if (!idx_ie || idx_ie[1] < 3) 6151 return valid; 6152 6153 idx = (void *)(idx_ie + 2); 6154 6155 if (dtim_count) 6156 *dtim_count = idx->dtim_count; 6157 6158 if (dtim_period) 6159 *dtim_period = idx->dtim_period; 6160 6161 return true; 6162} 6163 6164static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6165{ 6166 if (bm_size == 1) 6167 return *data; 6168 6169 return get_unaligned_le16(data); 6170} 6171 6172static int 6173ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6174 const struct ieee80211_ttlm_elem *ttlm, 6175 struct ieee80211_adv_ttlm_info *ttlm_info) 6176{ 6177 /* The element size was already validated in 6178 * ieee80211_tid_to_link_map_size_ok() 6179 */ 6180 u8 control, link_map_presence, map_size, tid; 6181 u8 *pos; 6182 6183 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6184 pos = (void *)ttlm->optional; 6185 control = ttlm->control; 6186 6187 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6188 IEEE80211_TTLM_DIRECTION_BOTH) { 6189 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6190 return -EINVAL; 6191 } 6192 6193 if (!(control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP)) { 6194 link_map_presence = *pos; 6195 pos++; 6196 } 6197 6198 if (control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT) { 6199 ttlm_info->switch_time = get_unaligned_le16(pos); 6200 6201 /* Since ttlm_info->switch_time == 0 means no switch time, bump 6202 * it by 1. 6203 */ 6204 if (!ttlm_info->switch_time) 6205 ttlm_info->switch_time = 1; 6206 6207 pos += 2; 6208 } 6209 6210 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6211 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6212 pos += 3; 6213 } 6214 6215 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6216 ttlm_info->map = 0xffff; 6217 return 0; 6218 } 6219 6220 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6221 map_size = 1; 6222 else 6223 map_size = 2; 6224 6225 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6226 * not advertise a TID-to-link mapping that does not map all TIDs to the 6227 * same link set, reject frame if not all links have mapping 6228 */ 6229 if (link_map_presence != 0xff) { 6230 sdata_info(sdata, 6231 "Invalid advertised T2L mapping presence indicator\n"); 6232 return -EINVAL; 6233 } 6234 6235 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6236 if (!ttlm_info->map) { 6237 sdata_info(sdata, 6238 "Invalid advertised T2L map for TID 0\n"); 6239 return -EINVAL; 6240 } 6241 6242 pos += map_size; 6243 6244 for (tid = 1; tid < 8; tid++) { 6245 u16 map = ieee80211_get_ttlm(map_size, pos); 6246 6247 if (map != ttlm_info->map) { 6248 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6249 tid); 6250 return -EINVAL; 6251 } 6252 6253 pos += map_size; 6254 } 6255 return 0; 6256} 6257 6258static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6259 struct ieee80211_mgmt *mgmt, 6260 struct ieee802_11_elems *elems, 6261 const u8 *elem_start, unsigned int elem_len) 6262{ 6263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6264 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6265 struct ieee80211_local *local = sdata->local; 6266 unsigned int link_id; 6267 struct sta_info *sta; 6268 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6269 u16 valid_links = 0, dormant_links = 0; 6270 int err; 6271 6272 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6273 /* 6274 * station info was already allocated and inserted before 6275 * the association and should be available to us 6276 */ 6277 sta = sta_info_get(sdata, assoc_data->ap_addr); 6278 if (WARN_ON(!sta)) 6279 goto out_err; 6280 6281 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6282 6283 if (ieee80211_vif_is_mld(&sdata->vif)) { 6284 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6285 if (!assoc_data->link[link_id].bss) 6286 continue; 6287 6288 valid_links |= BIT(link_id); 6289 6290 if (link_id != assoc_data->assoc_link_id) { 6291 err = ieee80211_sta_allocate_link(sta, link_id); 6292 if (err) 6293 goto out_err; 6294 } 6295 } 6296 6297 /* 6298 * We do not support setting a negotiated TTLM during 6299 * association. As such, we can assume that if there is a TTLM, 6300 * then it is the currently active advertised TTLM. 6301 * In that case, there must be exactly one TTLM that does not 6302 * have a switch time set. This mapping should also leave us 6303 * with at least one usable link. 6304 */ 6305 if (elems->ttlm_num > 1) { 6306 sdata_info(sdata, 6307 "More than one advertised TTLM in association response\n"); 6308 goto out_err; 6309 } else if (elems->ttlm_num == 1) { 6310 if (ieee80211_parse_adv_t2l(sdata, elems->ttlm[0], 6311 &sdata->u.mgd.ttlm_info) || 6312 sdata->u.mgd.ttlm_info.switch_time != 0 || 6313 !(valid_links & sdata->u.mgd.ttlm_info.map)) { 6314 sdata_info(sdata, 6315 "Invalid advertised TTLM in association response\n"); 6316 goto out_err; 6317 } 6318 6319 sdata->u.mgd.ttlm_info.active = true; 6320 dormant_links = 6321 valid_links & ~sdata->u.mgd.ttlm_info.map; 6322 } 6323 6324 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6325 } 6326 6327 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6328 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6329 struct ieee80211_link_data *link; 6330 struct link_sta_info *link_sta; 6331 6332 if (!cbss) 6333 continue; 6334 6335 link = sdata_dereference(sdata->link[link_id], sdata); 6336 if (WARN_ON(!link)) 6337 goto out_err; 6338 6339 if (ieee80211_vif_is_mld(&sdata->vif)) 6340 link_info(link, 6341 "local address %pM, AP link address %pM%s\n", 6342 link->conf->addr, 6343 assoc_data->link[link_id].bss->bssid, 6344 link_id == assoc_data->assoc_link_id ? 6345 " (assoc)" : ""); 6346 6347 link_sta = rcu_dereference_protected(sta->link[link_id], 6348 lockdep_is_held(&local->hw.wiphy->mtx)); 6349 if (WARN_ON(!link_sta)) 6350 goto out_err; 6351 6352 if (!link->u.mgd.have_beacon) { 6353 const struct cfg80211_bss_ies *ies; 6354 6355 rcu_read_lock(); 6356 ies = rcu_dereference(cbss->beacon_ies); 6357 if (ies) 6358 link->u.mgd.have_beacon = true; 6359 else 6360 ies = rcu_dereference(cbss->ies); 6361 ieee80211_get_dtim(ies, 6362 &link->conf->sync_dtim_count, 6363 &link->u.mgd.dtim_period); 6364 link->conf->beacon_int = cbss->beacon_interval; 6365 rcu_read_unlock(); 6366 } 6367 6368 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6369 6370 if (link_id != assoc_data->assoc_link_id) { 6371 link->u.mgd.conn = assoc_data->link[link_id].conn; 6372 6373 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6374 true, &link->u.mgd.conn, 6375 sdata->u.mgd.userspace_selectors); 6376 if (err) { 6377 link_info(link, "prep_channel failed\n"); 6378 goto out_err; 6379 } 6380 } 6381 6382 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6383 assoc_data->link[link_id].bss); 6384 if (err) 6385 goto out_err; 6386 6387 if (!ieee80211_assoc_config_link(link, link_sta, 6388 assoc_data->link[link_id].bss, 6389 mgmt, elem_start, elem_len, 6390 &changed[link_id])) 6391 goto out_err; 6392 6393 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6394 valid_links &= ~BIT(link_id); 6395 ieee80211_sta_remove_link(sta, link_id); 6396 continue; 6397 } 6398 6399 if (link_id != assoc_data->assoc_link_id) { 6400 err = ieee80211_sta_activate_link(sta, link_id); 6401 if (err) 6402 goto out_err; 6403 } 6404 } 6405 6406 /* links might have changed due to rejected ones, set them again */ 6407 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6408 6409 rate_control_rate_init_all_links(sta); 6410 6411 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6412 set_sta_flag(sta, WLAN_STA_MFP); 6413 sta->sta.mfp = true; 6414 } else { 6415 sta->sta.mfp = false; 6416 } 6417 6418 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6419 elems->ext_capab_len); 6420 6421 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6422 local->hw.queues >= IEEE80211_NUM_ACS; 6423 6424 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6425 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6426 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6427 if (err) { 6428 sdata_info(sdata, 6429 "failed to move station %pM to desired state\n", 6430 sta->sta.addr); 6431 WARN_ON(__sta_info_destroy(sta)); 6432 goto out_err; 6433 } 6434 6435 if (sdata->wdev.use_4addr) 6436 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6437 6438 ieee80211_set_associated(sdata, assoc_data, changed); 6439 6440 /* 6441 * If we're using 4-addr mode, let the AP know that we're 6442 * doing so, so that it can create the STA VLAN on its side 6443 */ 6444 if (ifmgd->use_4addr) 6445 ieee80211_send_4addr_nullfunc(local, sdata); 6446 6447 /* 6448 * Start timer to probe the connection to the AP now. 6449 * Also start the timer that will detect beacon loss. 6450 */ 6451 ieee80211_sta_reset_beacon_monitor(sdata); 6452 ieee80211_sta_reset_conn_monitor(sdata); 6453 6454 return true; 6455out_err: 6456 eth_zero_addr(sdata->vif.cfg.ap_addr); 6457 return false; 6458} 6459 6460static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6461 struct ieee80211_mgmt *mgmt, 6462 size_t len) 6463{ 6464 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6465 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6466 u16 capab_info, status_code, aid; 6467 struct ieee80211_elems_parse_params parse_params = { 6468 .bss = NULL, 6469 .link_id = -1, 6470 .from_ap = true, 6471 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 6472 }; 6473 struct ieee802_11_elems *elems; 6474 int ac; 6475 const u8 *elem_start; 6476 unsigned int elem_len; 6477 bool reassoc; 6478 struct ieee80211_event event = { 6479 .type = MLME_EVENT, 6480 .u.mlme.data = ASSOC_EVENT, 6481 }; 6482 struct ieee80211_prep_tx_info info = {}; 6483 struct cfg80211_rx_assoc_resp_data resp = { 6484 .uapsd_queues = -1, 6485 }; 6486 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6487 unsigned int link_id; 6488 u16 max_aid = IEEE80211_MAX_AID; 6489 6490 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6491 6492 if (!assoc_data) 6493 return; 6494 6495 info.link_id = assoc_data->assoc_link_id; 6496 6497 parse_params.mode = 6498 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6499 6500 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6501 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6502 return; 6503 6504 /* 6505 * AssocResp and ReassocResp have identical structure, so process both 6506 * of them in this function. 6507 */ 6508 6509 if (len < 24 + 6) 6510 return; 6511 6512 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6513 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6514 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6515 if (assoc_data->s1g) { 6516 elem_start = mgmt->u.s1g_assoc_resp.variable; 6517 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6518 } else { 6519 elem_start = mgmt->u.assoc_resp.variable; 6520 } 6521 6522 /* 6523 * Note: this may not be perfect, AP might misbehave - if 6524 * anyone needs to rely on perfect complete notification 6525 * with the exact right subtype, then we need to track what 6526 * we actually transmitted. 6527 */ 6528 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6529 IEEE80211_STYPE_ASSOC_REQ; 6530 6531 if (assoc_data->fils_kek_len && 6532 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6533 return; 6534 6535 elem_len = len - (elem_start - (u8 *)mgmt); 6536 parse_params.start = elem_start; 6537 parse_params.len = elem_len; 6538 elems = ieee802_11_parse_elems_full(&parse_params); 6539 if (!elems) 6540 goto notify_driver; 6541 6542 if (elems->aid_resp) 6543 aid = le16_to_cpu(elems->aid_resp->aid); 6544 else 6545 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6546 6547 /* 6548 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6549 * an S1G STA the 3 MSBs are reserved. 6550 * (802.11-2016 9.4.1.8 AID field). 6551 */ 6552 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6553 6554 sdata_info(sdata, 6555 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6556 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6557 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6558 6559 ifmgd->broken_ap = false; 6560 6561 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6562 elems->timeout_int && 6563 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6564 u32 tu, ms; 6565 6566 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6567 le32_to_cpu(elems->timeout_int->value)); 6568 6569 tu = le32_to_cpu(elems->timeout_int->value); 6570 ms = tu * 1024 / 1000; 6571 sdata_info(sdata, 6572 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6573 assoc_data->ap_addr, tu, ms); 6574 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6575 assoc_data->timeout_started = true; 6576 assoc_data->comeback = true; 6577 if (ms > IEEE80211_ASSOC_TIMEOUT) 6578 run_again(sdata, assoc_data->timeout); 6579 goto notify_driver; 6580 } 6581 6582 if (status_code != WLAN_STATUS_SUCCESS) { 6583 sdata_info(sdata, "%pM denied association (code=%d)\n", 6584 assoc_data->ap_addr, status_code); 6585 event.u.mlme.status = MLME_DENIED; 6586 event.u.mlme.reason = status_code; 6587 drv_event_callback(sdata->local, sdata, &event); 6588 } else { 6589 if (aid == 0 || aid > max_aid) { 6590 sdata_info(sdata, 6591 "invalid AID value %d (out of range), turn off PS\n", 6592 aid); 6593 aid = 0; 6594 ifmgd->broken_ap = true; 6595 } 6596 6597 if (ieee80211_vif_is_mld(&sdata->vif)) { 6598 struct ieee80211_mle_basic_common_info *common; 6599 6600 if (!elems->ml_basic) { 6601 sdata_info(sdata, 6602 "MLO association with %pM but no (basic) multi-link element in response!\n", 6603 assoc_data->ap_addr); 6604 goto abandon_assoc; 6605 } 6606 6607 common = (void *)elems->ml_basic->variable; 6608 6609 if (memcmp(assoc_data->ap_addr, 6610 common->mld_mac_addr, ETH_ALEN)) { 6611 sdata_info(sdata, 6612 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6613 common->mld_mac_addr, 6614 assoc_data->ap_addr); 6615 goto abandon_assoc; 6616 } 6617 6618 sdata->vif.cfg.eml_cap = 6619 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6620 sdata->vif.cfg.eml_med_sync_delay = 6621 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6622 sdata->vif.cfg.mld_capa_op = 6623 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6624 } 6625 6626 sdata->vif.cfg.aid = aid; 6627 sdata->vif.cfg.s1g = assoc_data->s1g; 6628 6629 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6630 elem_start, elem_len)) { 6631 /* oops -- internal error -- send timeout for now */ 6632 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6633 goto notify_driver; 6634 } 6635 event.u.mlme.status = MLME_SUCCESS; 6636 drv_event_callback(sdata->local, sdata, &event); 6637 sdata_info(sdata, "associated\n"); 6638 6639 info.success = 1; 6640 } 6641 6642 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6643 struct ieee80211_link_data *link; 6644 6645 if (!assoc_data->link[link_id].bss) 6646 continue; 6647 6648 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6649 ether_addr_copy(resp.links[link_id].addr, 6650 assoc_data->link[link_id].addr); 6651 resp.links[link_id].status = assoc_data->link[link_id].status; 6652 6653 link = sdata_dereference(sdata->link[link_id], sdata); 6654 if (!link) 6655 continue; 6656 6657 /* get uapsd queues configuration - same for all links */ 6658 resp.uapsd_queues = 0; 6659 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6660 if (link->tx_conf[ac].uapsd) 6661 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6662 } 6663 6664 if (ieee80211_vif_is_mld(&sdata->vif)) { 6665 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6666 resp.ap_mld_addr = ap_mld_addr; 6667 } 6668 6669 ieee80211_destroy_assoc_data(sdata, 6670 status_code == WLAN_STATUS_SUCCESS ? 6671 ASSOC_SUCCESS : 6672 ASSOC_REJECTED); 6673 6674 resp.buf = (u8 *)mgmt; 6675 resp.len = len; 6676 resp.req_ies = ifmgd->assoc_req_ies; 6677 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6678 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6679notify_driver: 6680 drv_mgd_complete_tx(sdata->local, sdata, &info); 6681 kfree(elems); 6682 return; 6683abandon_assoc: 6684 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6685 goto notify_driver; 6686} 6687 6688static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6689 struct ieee80211_mgmt *mgmt, size_t len, 6690 struct ieee80211_rx_status *rx_status) 6691{ 6692 struct ieee80211_sub_if_data *sdata = link->sdata; 6693 struct ieee80211_local *local = sdata->local; 6694 struct ieee80211_bss *bss; 6695 struct ieee80211_channel *channel; 6696 6697 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6698 6699 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6700 ieee80211_rx_status_to_khz(rx_status)); 6701 if (!channel) 6702 return; 6703 6704 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6705 if (bss) { 6706 link->conf->beacon_rate = bss->beacon_rate; 6707 ieee80211_rx_bss_put(local, bss); 6708 } 6709} 6710 6711 6712static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6713 struct sk_buff *skb) 6714{ 6715 struct ieee80211_sub_if_data *sdata = link->sdata; 6716 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6717 struct ieee80211_if_managed *ifmgd; 6718 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6719 struct ieee80211_channel *channel; 6720 size_t baselen, len = skb->len; 6721 6722 ifmgd = &sdata->u.mgd; 6723 6724 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6725 6726 /* 6727 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6728 * "If a 6 GHz AP receives a Probe Request frame and responds with 6729 * a Probe Response frame [..], the Address 1 field of the Probe 6730 * Response frame shall be set to the broadcast address [..]" 6731 * So, on 6GHz band we should also accept broadcast responses. 6732 */ 6733 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 6734 ieee80211_rx_status_to_khz(rx_status)); 6735 if (!channel) 6736 return; 6737 6738 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6739 (channel->band != NL80211_BAND_6GHZ || 6740 !is_broadcast_ether_addr(mgmt->da))) 6741 return; /* ignore ProbeResp to foreign address */ 6742 6743 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6744 if (baselen > len) 6745 return; 6746 6747 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6748 6749 if (ifmgd->associated && 6750 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6751 ieee80211_reset_ap_probe(sdata); 6752} 6753 6754/* 6755 * This is the canonical list of information elements we care about, 6756 * the filter code also gives us all changes to the Microsoft OUI 6757 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6758 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6759 * changes to requested client power. 6760 * 6761 * We implement beacon filtering in software since that means we can 6762 * avoid processing the frame here and in cfg80211, and userspace 6763 * will not be able to tell whether the hardware supports it or not. 6764 * 6765 * XXX: This list needs to be dynamic -- userspace needs to be able to 6766 * add items it requires. It also needs to be able to tell us to 6767 * look out for other vendor IEs. 6768 */ 6769static const u64 care_about_ies = 6770 (1ULL << WLAN_EID_COUNTRY) | 6771 (1ULL << WLAN_EID_ERP_INFO) | 6772 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6773 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6774 (1ULL << WLAN_EID_HT_CAPABILITY) | 6775 (1ULL << WLAN_EID_HT_OPERATION) | 6776 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6777 6778static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6779 struct ieee80211_if_managed *ifmgd, 6780 struct ieee80211_bss_conf *bss_conf, 6781 struct ieee80211_local *local, 6782 struct ieee80211_rx_status *rx_status) 6783{ 6784 struct ieee80211_sub_if_data *sdata = link->sdata; 6785 6786 /* Track average RSSI from the Beacon frames of the current AP */ 6787 6788 if (!link->u.mgd.tracking_signal_avg) { 6789 link->u.mgd.tracking_signal_avg = true; 6790 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6791 link->u.mgd.last_cqm_event_signal = 0; 6792 link->u.mgd.count_beacon_signal = 1; 6793 link->u.mgd.last_ave_beacon_signal = 0; 6794 } else { 6795 link->u.mgd.count_beacon_signal++; 6796 } 6797 6798 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6799 -rx_status->signal); 6800 6801 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6802 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6803 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6804 int last_sig = link->u.mgd.last_ave_beacon_signal; 6805 struct ieee80211_event event = { 6806 .type = RSSI_EVENT, 6807 }; 6808 6809 /* 6810 * if signal crosses either of the boundaries, invoke callback 6811 * with appropriate parameters 6812 */ 6813 if (sig > ifmgd->rssi_max_thold && 6814 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6815 link->u.mgd.last_ave_beacon_signal = sig; 6816 event.u.rssi.data = RSSI_EVENT_HIGH; 6817 drv_event_callback(local, sdata, &event); 6818 } else if (sig < ifmgd->rssi_min_thold && 6819 (last_sig >= ifmgd->rssi_max_thold || 6820 last_sig == 0)) { 6821 link->u.mgd.last_ave_beacon_signal = sig; 6822 event.u.rssi.data = RSSI_EVENT_LOW; 6823 drv_event_callback(local, sdata, &event); 6824 } 6825 } 6826 6827 if (bss_conf->cqm_rssi_thold && 6828 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6829 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6830 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6831 int last_event = link->u.mgd.last_cqm_event_signal; 6832 int thold = bss_conf->cqm_rssi_thold; 6833 int hyst = bss_conf->cqm_rssi_hyst; 6834 6835 if (sig < thold && 6836 (last_event == 0 || sig < last_event - hyst)) { 6837 link->u.mgd.last_cqm_event_signal = sig; 6838 ieee80211_cqm_rssi_notify( 6839 &sdata->vif, 6840 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6841 sig, GFP_KERNEL); 6842 } else if (sig > thold && 6843 (last_event == 0 || sig > last_event + hyst)) { 6844 link->u.mgd.last_cqm_event_signal = sig; 6845 ieee80211_cqm_rssi_notify( 6846 &sdata->vif, 6847 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6848 sig, GFP_KERNEL); 6849 } 6850 } 6851 6852 if (bss_conf->cqm_rssi_low && 6853 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6854 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6855 int last_event = link->u.mgd.last_cqm_event_signal; 6856 int low = bss_conf->cqm_rssi_low; 6857 int high = bss_conf->cqm_rssi_high; 6858 6859 if (sig < low && 6860 (last_event == 0 || last_event >= low)) { 6861 link->u.mgd.last_cqm_event_signal = sig; 6862 ieee80211_cqm_rssi_notify( 6863 &sdata->vif, 6864 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6865 sig, GFP_KERNEL); 6866 } else if (sig > high && 6867 (last_event == 0 || last_event <= high)) { 6868 link->u.mgd.last_cqm_event_signal = sig; 6869 ieee80211_cqm_rssi_notify( 6870 &sdata->vif, 6871 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6872 sig, GFP_KERNEL); 6873 } 6874 } 6875} 6876 6877static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6878 struct cfg80211_bss *bss) 6879{ 6880 if (ether_addr_equal(tx_bssid, bss->bssid)) 6881 return true; 6882 if (!bss->transmitted_bss) 6883 return false; 6884 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6885} 6886 6887static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6888 struct wiphy_work *work) 6889{ 6890 struct ieee80211_sub_if_data *sdata = 6891 container_of(work, struct ieee80211_sub_if_data, 6892 u.mgd.ml_reconf_work.work); 6893 u16 new_valid_links, new_active_links, new_dormant_links; 6894 int ret; 6895 6896 if (!sdata->u.mgd.removed_links) 6897 return; 6898 6899 sdata_info(sdata, 6900 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6901 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6902 6903 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6904 if (new_valid_links == sdata->vif.valid_links) 6905 return; 6906 6907 if (!new_valid_links || 6908 !(new_valid_links & ~sdata->vif.dormant_links)) { 6909 sdata_info(sdata, "No valid links after reconfiguration\n"); 6910 ret = -EINVAL; 6911 goto out; 6912 } 6913 6914 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6915 if (new_active_links != sdata->vif.active_links) { 6916 if (!new_active_links) 6917 new_active_links = 6918 BIT(ffs(new_valid_links & 6919 ~sdata->vif.dormant_links) - 1); 6920 6921 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6922 if (ret) { 6923 sdata_info(sdata, 6924 "Failed setting active links\n"); 6925 goto out; 6926 } 6927 } 6928 6929 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6930 6931 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6932 new_dormant_links); 6933 if (ret) 6934 sdata_info(sdata, "Failed setting valid links\n"); 6935 6936 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6937 6938out: 6939 if (!ret) 6940 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6941 else 6942 __ieee80211_disconnect(sdata); 6943 6944 sdata->u.mgd.removed_links = 0; 6945} 6946 6947static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6948 struct ieee802_11_elems *elems) 6949{ 6950 const struct element *sub; 6951 unsigned long removed_links = 0; 6952 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6953 u8 link_id; 6954 u32 delay; 6955 6956 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6957 return; 6958 6959 /* Directly parse the sub elements as the common information doesn't 6960 * hold any useful information. 6961 */ 6962 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6963 elems->ml_reconf_len) { 6964 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6965 u8 *pos = prof->variable; 6966 u16 control; 6967 6968 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6969 continue; 6970 6971 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6972 sub->datalen)) 6973 return; 6974 6975 control = le16_to_cpu(prof->control); 6976 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6977 6978 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6979 continue; 6980 6981 removed_links |= BIT(link_id); 6982 6983 /* the MAC address should not be included, but handle it */ 6984 if (control & 6985 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6986 pos += 6; 6987 6988 /* According to Draft P802.11be_D3.0, the control should 6989 * include the AP Removal Timer present. If the AP Removal Timer 6990 * is not present assume immediate removal. 6991 */ 6992 if (control & 6993 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6994 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6995 } 6996 6997 removed_links &= sdata->vif.valid_links; 6998 if (!removed_links) { 6999 /* In case the removal was cancelled, abort it */ 7000 if (sdata->u.mgd.removed_links) { 7001 sdata->u.mgd.removed_links = 0; 7002 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7003 &sdata->u.mgd.ml_reconf_work); 7004 } 7005 return; 7006 } 7007 7008 delay = 0; 7009 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 7010 struct ieee80211_bss_conf *link_conf = 7011 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 7012 u32 link_delay; 7013 7014 if (!link_conf) { 7015 removed_links &= ~BIT(link_id); 7016 continue; 7017 } 7018 7019 if (link_removal_timeout[link_id] < 1) 7020 link_delay = 0; 7021 else 7022 link_delay = link_conf->beacon_int * 7023 (link_removal_timeout[link_id] - 1); 7024 7025 if (!delay) 7026 delay = link_delay; 7027 else 7028 delay = min(delay, link_delay); 7029 } 7030 7031 sdata->u.mgd.removed_links = removed_links; 7032 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7033 &sdata->u.mgd.ml_reconf_work, 7034 us_to_ktime(ieee80211_tu_to_usec(delay))); 7035} 7036 7037static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 7038 u16 active_links, u16 dormant_links, 7039 u16 suspended_links) 7040{ 7041 u64 changed = 0; 7042 int ret; 7043 7044 if (!active_links) { 7045 ret = -EINVAL; 7046 goto out; 7047 } 7048 7049 /* If there is an active negotiated TTLM, it should be discarded by 7050 * the new negotiated/advertised TTLM. 7051 */ 7052 if (sdata->vif.neg_ttlm.valid) { 7053 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7054 sdata->vif.suspended_links = 0; 7055 changed = BSS_CHANGED_MLD_TTLM; 7056 } 7057 7058 if (sdata->vif.active_links != active_links) { 7059 /* usable links are affected when active_links are changed, 7060 * so notify the driver about the status change 7061 */ 7062 changed |= BSS_CHANGED_MLD_VALID_LINKS; 7063 active_links &= sdata->vif.active_links; 7064 if (!active_links) 7065 active_links = 7066 BIT(__ffs(sdata->vif.valid_links & 7067 ~dormant_links)); 7068 ret = ieee80211_set_active_links(&sdata->vif, active_links); 7069 if (ret) { 7070 sdata_info(sdata, "Failed to set TTLM active links\n"); 7071 goto out; 7072 } 7073 } 7074 7075 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7076 dormant_links); 7077 if (ret) { 7078 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 7079 goto out; 7080 } 7081 7082 sdata->vif.suspended_links = suspended_links; 7083 if (sdata->vif.suspended_links) 7084 changed |= BSS_CHANGED_MLD_TTLM; 7085 7086 ieee80211_vif_cfg_change_notify(sdata, changed); 7087 7088out: 7089 if (ret) 7090 ieee80211_disconnect(&sdata->vif, false); 7091 7092 return ret; 7093} 7094 7095static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 7096 struct wiphy_work *work) 7097{ 7098 u16 new_active_links, new_dormant_links; 7099 struct ieee80211_sub_if_data *sdata = 7100 container_of(work, struct ieee80211_sub_if_data, 7101 u.mgd.ttlm_work.work); 7102 7103 new_active_links = sdata->u.mgd.ttlm_info.map & 7104 sdata->vif.valid_links; 7105 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 7106 sdata->vif.valid_links; 7107 7108 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 7109 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 7110 0)) 7111 return; 7112 7113 sdata->u.mgd.ttlm_info.active = true; 7114 sdata->u.mgd.ttlm_info.switch_time = 0; 7115} 7116 7117static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7118 struct ieee802_11_elems *elems, 7119 u64 beacon_ts) 7120{ 7121 u8 i; 7122 int ret; 7123 7124 if (!ieee80211_vif_is_mld(&sdata->vif)) 7125 return; 7126 7127 if (!elems->ttlm_num) { 7128 if (sdata->u.mgd.ttlm_info.switch_time) { 7129 /* if a planned TID-to-link mapping was cancelled - 7130 * abort it 7131 */ 7132 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7133 &sdata->u.mgd.ttlm_work); 7134 } else if (sdata->u.mgd.ttlm_info.active) { 7135 /* if no TID-to-link element, set to default mapping in 7136 * which all TIDs are mapped to all setup links 7137 */ 7138 ret = ieee80211_vif_set_links(sdata, 7139 sdata->vif.valid_links, 7140 0); 7141 if (ret) { 7142 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7143 return; 7144 } 7145 ieee80211_vif_cfg_change_notify(sdata, 7146 BSS_CHANGED_MLD_VALID_LINKS); 7147 } 7148 memset(&sdata->u.mgd.ttlm_info, 0, 7149 sizeof(sdata->u.mgd.ttlm_info)); 7150 return; 7151 } 7152 7153 for (i = 0; i < elems->ttlm_num; i++) { 7154 struct ieee80211_adv_ttlm_info ttlm_info; 7155 u32 res; 7156 7157 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7158 &ttlm_info); 7159 7160 if (res) { 7161 __ieee80211_disconnect(sdata); 7162 return; 7163 } 7164 7165 if (ttlm_info.switch_time) { 7166 u16 beacon_ts_tu, st_tu, delay; 7167 u64 delay_usec; 7168 u64 mask; 7169 7170 /* The t2l map switch time is indicated with a partial 7171 * TSF value (bits 10 to 25), get the partial beacon TS 7172 * as well, and calc the delay to the start time. 7173 */ 7174 mask = GENMASK_ULL(25, 10); 7175 beacon_ts_tu = (beacon_ts & mask) >> 10; 7176 st_tu = ttlm_info.switch_time; 7177 delay = st_tu - beacon_ts_tu; 7178 7179 /* 7180 * If the switch time is far in the future, then it 7181 * could also be the previous switch still being 7182 * announced. 7183 * We can simply ignore it for now, if it is a future 7184 * switch the AP will continue to announce it anyway. 7185 */ 7186 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7187 return; 7188 7189 delay_usec = ieee80211_tu_to_usec(delay); 7190 7191 /* Link switching can take time, so schedule it 7192 * 100ms before to be ready on time 7193 */ 7194 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7195 delay_usec -= 7196 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7197 else 7198 delay_usec = 0; 7199 7200 sdata->u.mgd.ttlm_info = ttlm_info; 7201 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7202 &sdata->u.mgd.ttlm_work); 7203 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7204 &sdata->u.mgd.ttlm_work, 7205 us_to_ktime(delay_usec)); 7206 return; 7207 } 7208 } 7209} 7210 7211static void 7212ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7213 int reporting_link_id, 7214 struct ieee802_11_elems *elems) 7215{ 7216 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7217 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7218 const struct element *sub; 7219 const u8 *subelems; 7220 size_t subelems_len; 7221 u8 common_size; 7222 int link_id; 7223 7224 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7225 return; 7226 7227 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7228 subelems = (u8 *)elems->ml_basic + common_size; 7229 subelems_len = elems->ml_basic_len - common_size; 7230 7231 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7232 subelems, subelems_len) { 7233 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7234 struct ieee80211_link_data *link; 7235 ssize_t len; 7236 7237 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7238 sub->datalen)) 7239 continue; 7240 7241 link_id = le16_get_bits(prof->control, 7242 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7243 /* need a valid link ID, but also not our own, both AP bugs */ 7244 if (link_id == reporting_link_id || 7245 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7246 continue; 7247 7248 link = sdata_dereference(sdata->link[link_id], sdata); 7249 if (!link) 7250 continue; 7251 7252 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7253 NULL, 0, 7254 IEEE80211_MLE_SUBELEM_FRAGMENT); 7255 if (WARN_ON(len < 0)) 7256 continue; 7257 7258 sta_profiles[link_id] = sub; 7259 sta_profiles_len[link_id] = len; 7260 } 7261 7262 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7263 struct ieee80211_mle_per_sta_profile *prof; 7264 struct ieee802_11_elems *prof_elems; 7265 struct ieee80211_link_data *link; 7266 ssize_t len; 7267 7268 if (link_id == reporting_link_id) 7269 continue; 7270 7271 link = sdata_dereference(sdata->link[link_id], sdata); 7272 if (!link) 7273 continue; 7274 7275 if (!sta_profiles[link_id]) { 7276 prof_elems = NULL; 7277 goto handle; 7278 } 7279 7280 /* we can defragment in-place, won't use the buffer again */ 7281 len = cfg80211_defragment_element(sta_profiles[link_id], 7282 subelems, subelems_len, 7283 (void *)sta_profiles[link_id], 7284 sta_profiles_len[link_id], 7285 IEEE80211_MLE_SUBELEM_FRAGMENT); 7286 if (WARN_ON(len != sta_profiles_len[link_id])) 7287 continue; 7288 7289 prof = (void *)sta_profiles[link_id]; 7290 prof_elems = ieee802_11_parse_elems(prof->variable + 7291 (prof->sta_info_len - 1), 7292 len - 7293 (prof->sta_info_len - 1), 7294 IEEE80211_FTYPE_MGMT | 7295 IEEE80211_STYPE_BEACON, 7296 NULL); 7297 7298 /* memory allocation failed - let's hope that's transient */ 7299 if (!prof_elems) 7300 continue; 7301 7302handle: 7303 /* 7304 * FIXME: the timings here are obviously incorrect, 7305 * but only older Intel drivers seem to care, and 7306 * those don't have MLO. If you really need this, 7307 * the problem is having to calculate it with the 7308 * TSF offset etc. The device_timestamp is still 7309 * correct, of course. 7310 */ 7311 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7312 IEEE80211_CSA_SOURCE_OTHER_LINK); 7313 kfree(prof_elems); 7314 } 7315} 7316 7317static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7318 const struct ieee802_11_elems *elems) 7319{ 7320 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7321 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7322 7323 if (!elems->ssid) 7324 return false; 7325 7326 /* hidden SSID: zero length */ 7327 if (elems->ssid_len == 0) 7328 return false; 7329 7330 if (elems->ssid_len != cfg->ssid_len) 7331 return true; 7332 7333 /* hidden SSID: zeroed out */ 7334 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7335 return false; 7336 7337 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7338} 7339 7340static bool 7341ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7342 struct ieee80211_mgmt *mgmt, 7343 struct ieee80211_rx_status *rx_status, 7344 struct ieee80211_chanctx_conf *chanctx) 7345{ 7346 u32 pri_2mhz_khz; 7347 struct ieee80211_channel *s1g_sibling_1mhz; 7348 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7349 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7350 7351 if (rx_khz == pri_khz) 7352 return true; 7353 7354 if (!chanctx->def.s1g_primary_2mhz) 7355 return false; 7356 7357 /* 7358 * If we have an S1G interface with a 2MHz primary, beacons are 7359 * sent on the center frequency of the 2MHz primary. Find the sibling 7360 * 1MHz channel and calculate the 2MHz primary center frequency. 7361 */ 7362 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7363 &chanctx->def); 7364 if (!s1g_sibling_1mhz) 7365 return false; 7366 7367 pri_2mhz_khz = 7368 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7369 return rx_khz == pri_2mhz_khz; 7370} 7371 7372static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7373 struct ieee80211_hdr *hdr, size_t len, 7374 struct ieee80211_rx_status *rx_status) 7375{ 7376 struct ieee80211_sub_if_data *sdata = link->sdata; 7377 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7378 struct ieee80211_bss_conf *bss_conf = link->conf; 7379 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7380 struct ieee80211_mgmt *mgmt = (void *) hdr; 7381 struct ieee80211_ext *ext = NULL; 7382 size_t baselen; 7383 struct ieee802_11_elems *elems; 7384 struct ieee80211_local *local = sdata->local; 7385 struct ieee80211_chanctx_conf *chanctx_conf; 7386 struct ieee80211_supported_band *sband; 7387 struct ieee80211_channel *chan; 7388 struct link_sta_info *link_sta; 7389 struct sta_info *sta; 7390 u64 changed = 0; 7391 bool erp_valid; 7392 u8 erp_value = 0; 7393 u32 ncrc = 0; 7394 u8 *bssid, *variable = mgmt->u.beacon.variable; 7395 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7396 struct ieee80211_elems_parse_params parse_params = { 7397 .mode = link->u.mgd.conn.mode, 7398 .link_id = -1, 7399 .from_ap = true, 7400 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7401 }; 7402 7403 lockdep_assert_wiphy(local->hw.wiphy); 7404 7405 /* Process beacon from the current BSS */ 7406 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7407 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7408 ext = (void *)mgmt; 7409 variable = ext->u.s1g_beacon.variable + 7410 ieee80211_s1g_optional_len(ext->frame_control); 7411 } 7412 7413 baselen = (u8 *) variable - (u8 *) mgmt; 7414 if (baselen > len) 7415 return; 7416 7417 parse_params.start = variable; 7418 parse_params.len = len - baselen; 7419 7420 rcu_read_lock(); 7421 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7422 if (!chanctx_conf) { 7423 rcu_read_unlock(); 7424 return; 7425 } 7426 7427 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7428 chanctx_conf)) { 7429 rcu_read_unlock(); 7430 return; 7431 } 7432 chan = chanctx_conf->def.chan; 7433 rcu_read_unlock(); 7434 7435 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7436 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7437 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7438 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7439 elems = ieee802_11_parse_elems_full(&parse_params); 7440 if (!elems) 7441 return; 7442 7443 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7444 7445 if (elems->dtim_period) 7446 link->u.mgd.dtim_period = elems->dtim_period; 7447 link->u.mgd.have_beacon = true; 7448 ifmgd->assoc_data->need_beacon = false; 7449 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7450 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7451 bss_conf->sync_tsf = 7452 le64_to_cpu(mgmt->u.beacon.timestamp); 7453 bss_conf->sync_device_ts = 7454 rx_status->device_timestamp; 7455 bss_conf->sync_dtim_count = elems->dtim_count; 7456 } 7457 7458 if (elems->mbssid_config_ie) 7459 bss_conf->profile_periodicity = 7460 elems->mbssid_config_ie->profile_periodicity; 7461 else 7462 bss_conf->profile_periodicity = 0; 7463 7464 if (elems->ext_capab_len >= 11 && 7465 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7466 bss_conf->ema_ap = true; 7467 else 7468 bss_conf->ema_ap = false; 7469 7470 /* continue assoc process */ 7471 ifmgd->assoc_data->timeout = jiffies; 7472 ifmgd->assoc_data->timeout_started = true; 7473 run_again(sdata, ifmgd->assoc_data->timeout); 7474 kfree(elems); 7475 return; 7476 } 7477 7478 if (!ifmgd->associated || 7479 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7480 return; 7481 bssid = link->u.mgd.bssid; 7482 7483 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7484 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7485 local, rx_status); 7486 7487 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7488 mlme_dbg_ratelimited(sdata, 7489 "cancelling AP probe due to a received beacon\n"); 7490 ieee80211_reset_ap_probe(sdata); 7491 } 7492 7493 /* 7494 * Push the beacon loss detection into the future since 7495 * we are processing a beacon from the AP just now. 7496 */ 7497 ieee80211_sta_reset_beacon_monitor(sdata); 7498 7499 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7500 * element (which carries the beacon interval). Don't forget to add a 7501 * bit to care_about_ies[] above if mac80211 is interested in a 7502 * changing S1G element. 7503 */ 7504 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7505 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7506 parse_params.bss = bss_conf->bss; 7507 parse_params.filter = care_about_ies; 7508 parse_params.crc = ncrc; 7509 elems = ieee802_11_parse_elems_full(&parse_params); 7510 if (!elems) 7511 return; 7512 7513 if (rx_status->flag & RX_FLAG_DECRYPTED && 7514 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7515 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7516 sdata->vif.cfg.ap_addr); 7517 __ieee80211_disconnect(sdata); 7518 return; 7519 } 7520 7521 ncrc = elems->crc; 7522 7523 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7524 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7525 vif_cfg->s1g)) { 7526 if (local->hw.conf.dynamic_ps_timeout > 0) { 7527 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7528 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7529 ieee80211_hw_config(local, -1, 7530 IEEE80211_CONF_CHANGE_PS); 7531 } 7532 ieee80211_send_nullfunc(local, sdata, false); 7533 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7534 local->pspolling = true; 7535 7536 /* 7537 * Here is assumed that the driver will be 7538 * able to send ps-poll frame and receive a 7539 * response even though power save mode is 7540 * enabled, but some drivers might require 7541 * to disable power save here. This needs 7542 * to be investigated. 7543 */ 7544 ieee80211_send_pspoll(local, sdata); 7545 } 7546 } 7547 7548 if (sdata->vif.p2p || 7549 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7550 struct ieee80211_p2p_noa_attr noa = {}; 7551 int ret; 7552 7553 ret = cfg80211_get_p2p_attr(variable, 7554 len - baselen, 7555 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7556 (u8 *) &noa, sizeof(noa)); 7557 if (ret >= 2) { 7558 if (link->u.mgd.p2p_noa_index != noa.index) { 7559 /* valid noa_attr and index changed */ 7560 link->u.mgd.p2p_noa_index = noa.index; 7561 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7562 changed |= BSS_CHANGED_P2P_PS; 7563 /* 7564 * make sure we update all information, the CRC 7565 * mechanism doesn't look at P2P attributes. 7566 */ 7567 link->u.mgd.beacon_crc_valid = false; 7568 } 7569 } else if (link->u.mgd.p2p_noa_index != -1) { 7570 /* noa_attr not found and we had valid noa_attr before */ 7571 link->u.mgd.p2p_noa_index = -1; 7572 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7573 changed |= BSS_CHANGED_P2P_PS; 7574 link->u.mgd.beacon_crc_valid = false; 7575 } 7576 } 7577 7578 /* 7579 * Update beacon timing and dtim count on every beacon appearance. This 7580 * will allow the driver to use the most updated values. Do it before 7581 * comparing this one with last received beacon. 7582 * IMPORTANT: These parameters would possibly be out of sync by the time 7583 * the driver will use them. The synchronized view is currently 7584 * guaranteed only in certain callbacks. 7585 */ 7586 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7587 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7588 bss_conf->sync_tsf = 7589 le64_to_cpu(mgmt->u.beacon.timestamp); 7590 bss_conf->sync_device_ts = 7591 rx_status->device_timestamp; 7592 bss_conf->sync_dtim_count = elems->dtim_count; 7593 } 7594 7595 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7596 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7597 parse_params.start, 7598 parse_params.len))) 7599 goto free; 7600 link->u.mgd.beacon_crc = ncrc; 7601 link->u.mgd.beacon_crc_valid = true; 7602 7603 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7604 7605 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7606 rx_status->device_timestamp, 7607 elems, elems, 7608 IEEE80211_CSA_SOURCE_BEACON); 7609 7610 /* note that after this elems->ml_basic can no longer be used fully */ 7611 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7612 7613 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7614 7615 if (!sdata->u.mgd.epcs.enabled && 7616 !link->u.mgd.disable_wmm_tracking && 7617 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7618 elems->wmm_param_len, 7619 elems->mu_edca_param_set)) 7620 changed |= BSS_CHANGED_QOS; 7621 7622 /* 7623 * If we haven't had a beacon before, tell the driver about the 7624 * DTIM period (and beacon timing if desired) now. 7625 */ 7626 if (!link->u.mgd.have_beacon) { 7627 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7628 bss_conf->dtim_period = elems->dtim_period ?: 1; 7629 7630 changed |= BSS_CHANGED_BEACON_INFO; 7631 link->u.mgd.have_beacon = true; 7632 7633 ieee80211_recalc_ps(local); 7634 7635 ieee80211_recalc_ps_vif(sdata); 7636 } 7637 7638 if (elems->erp_info) { 7639 erp_valid = true; 7640 erp_value = elems->erp_info[0]; 7641 } else { 7642 erp_valid = false; 7643 } 7644 7645 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7646 changed |= ieee80211_handle_bss_capability(link, 7647 le16_to_cpu(mgmt->u.beacon.capab_info), 7648 erp_valid, erp_value); 7649 7650 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7651 if (WARN_ON(!sta)) { 7652 goto free; 7653 } 7654 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7655 lockdep_is_held(&local->hw.wiphy->mtx)); 7656 if (WARN_ON(!link_sta)) { 7657 goto free; 7658 } 7659 7660 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7661 goto free; 7662 7663 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7664 7665 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7666 7667 if (ieee80211_config_bw(link, elems, true, &changed, 7668 IEEE80211_STYPE_BEACON)) { 7669 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7670 WLAN_REASON_DEAUTH_LEAVING, 7671 true, deauth_buf); 7672 ieee80211_report_disconnect(sdata, deauth_buf, 7673 sizeof(deauth_buf), true, 7674 WLAN_REASON_DEAUTH_LEAVING, 7675 false); 7676 goto free; 7677 } 7678 7679 if (elems->opmode_notif) 7680 ieee80211_vht_handle_opmode(sdata, link_sta, 7681 *elems->opmode_notif, 7682 rx_status->band); 7683 7684 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7685 elems->country_elem, 7686 elems->country_elem_len, 7687 elems->pwr_constr_elem, 7688 elems->cisco_dtpc_elem); 7689 7690 ieee80211_ml_reconfiguration(sdata, elems); 7691 ieee80211_process_adv_ttlm(sdata, elems, 7692 le64_to_cpu(mgmt->u.beacon.timestamp)); 7693 7694 ieee80211_link_info_change_notify(sdata, link, changed); 7695free: 7696 kfree(elems); 7697} 7698 7699static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7700 struct ieee80211_neg_ttlm neg_ttlm) 7701{ 7702 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7703 u8 i; 7704 7705 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7706 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7707 7708 /* If there is an active TTLM, unset previously suspended links */ 7709 if (sdata->vif.neg_ttlm.valid) 7710 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7711 7712 /* exclude links that are already disabled by advertised TTLM */ 7713 new_active_links = 7714 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7715 new_suspended_links = 7716 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7717 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7718 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7719 new_dormant_links, new_suspended_links)) 7720 return; 7721 7722 sdata->vif.neg_ttlm = neg_ttlm; 7723 sdata->vif.neg_ttlm.valid = true; 7724} 7725 7726static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7727 struct wiphy_work *work) 7728{ 7729 struct ieee80211_sub_if_data *sdata = 7730 container_of(work, struct ieee80211_sub_if_data, 7731 u.mgd.neg_ttlm_timeout_work.work); 7732 7733 sdata_info(sdata, 7734 "No negotiated TTLM response from AP, disconnecting.\n"); 7735 7736 __ieee80211_disconnect(sdata); 7737} 7738 7739static void 7740ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7741 struct ieee80211_neg_ttlm *neg_ttlm) 7742{ 7743 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7744 7745 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7746 sizeof(neg_ttlm->downlink))) { 7747 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7748 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7749 } else { 7750 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7751 } 7752 7753 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7754 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7755 __le16 map; 7756 7757 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7758 7759 pos = skb_put(skb, len + 2); 7760 *pos++ = WLAN_EID_EXTENSION; 7761 len_pos = pos++; 7762 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7763 *pos++ = direction[i]; 7764 map_ind_pos = pos++; 7765 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7766 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7767 cpu_to_le16(neg_ttlm->uplink[tid]) : 7768 cpu_to_le16(neg_ttlm->downlink[tid]); 7769 if (!map) 7770 continue; 7771 7772 len += 2; 7773 map_ind |= BIT(tid); 7774 skb_put_data(skb, &map, sizeof(map)); 7775 } 7776 7777 *map_ind_pos = map_ind; 7778 *len_pos = len; 7779 7780 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7781 break; 7782 } 7783} 7784 7785static void 7786ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7787 struct ieee80211_neg_ttlm *neg_ttlm, 7788 u8 dialog_token) 7789{ 7790 struct ieee80211_local *local = sdata->local; 7791 struct ieee80211_mgmt *mgmt; 7792 struct sk_buff *skb; 7793 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7794 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7795 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7796 7797 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7798 if (!skb) 7799 return; 7800 7801 skb_reserve(skb, local->tx_headroom); 7802 mgmt = skb_put_zero(skb, hdr_len); 7803 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7804 IEEE80211_STYPE_ACTION); 7805 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7806 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7807 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7808 7809 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7810 mgmt->u.action.u.ttlm_req.action_code = 7811 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7812 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7813 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7814 ieee80211_tx_skb(sdata, skb); 7815} 7816 7817int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7818 struct cfg80211_ttlm_params *params) 7819{ 7820 struct ieee80211_neg_ttlm neg_ttlm = {}; 7821 u8 i; 7822 7823 if (!ieee80211_vif_is_mld(&sdata->vif) || 7824 !(sdata->vif.cfg.mld_capa_op & 7825 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7826 return -EINVAL; 7827 7828 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7829 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7830 (params->ulink[i] & ~sdata->vif.valid_links)) 7831 return -EINVAL; 7832 7833 neg_ttlm.downlink[i] = params->dlink[i]; 7834 neg_ttlm.uplink[i] = params->ulink[i]; 7835 } 7836 7837 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7838 NEG_TTLM_RES_ACCEPT) 7839 return -EINVAL; 7840 7841 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7842 sdata->u.mgd.dialog_token_alloc++; 7843 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7844 sdata->u.mgd.dialog_token_alloc); 7845 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7846 &sdata->u.mgd.neg_ttlm_timeout_work); 7847 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7848 &sdata->u.mgd.neg_ttlm_timeout_work, 7849 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7850 return 0; 7851} 7852 7853static void 7854ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7855 enum ieee80211_neg_ttlm_res ttlm_res, 7856 u8 dialog_token, 7857 struct ieee80211_neg_ttlm *neg_ttlm) 7858{ 7859 struct ieee80211_local *local = sdata->local; 7860 struct ieee80211_mgmt *mgmt; 7861 struct sk_buff *skb; 7862 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7863 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7864 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7865 u16 status_code; 7866 7867 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7868 if (!skb) 7869 return; 7870 7871 skb_reserve(skb, local->tx_headroom); 7872 mgmt = skb_put_zero(skb, hdr_len); 7873 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7874 IEEE80211_STYPE_ACTION); 7875 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7876 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7877 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7878 7879 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7880 mgmt->u.action.u.ttlm_res.action_code = 7881 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7882 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7883 switch (ttlm_res) { 7884 default: 7885 WARN_ON(1); 7886 fallthrough; 7887 case NEG_TTLM_RES_REJECT: 7888 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7889 break; 7890 case NEG_TTLM_RES_ACCEPT: 7891 status_code = WLAN_STATUS_SUCCESS; 7892 break; 7893 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7894 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7895 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7896 break; 7897 } 7898 7899 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7900 ieee80211_tx_skb(sdata, skb); 7901} 7902 7903static int 7904ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7905 const struct ieee80211_ttlm_elem *ttlm, 7906 struct ieee80211_neg_ttlm *neg_ttlm, 7907 u8 *direction) 7908{ 7909 u8 control, link_map_presence, map_size, tid; 7910 u8 *pos; 7911 7912 /* The element size was already validated in 7913 * ieee80211_tid_to_link_map_size_ok() 7914 */ 7915 pos = (void *)ttlm->optional; 7916 7917 control = ttlm->control; 7918 7919 /* mapping switch time and expected duration fields are not expected 7920 * in case of negotiated TTLM 7921 */ 7922 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7923 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7924 mlme_dbg(sdata, 7925 "Invalid TTLM element in negotiated TTLM request\n"); 7926 return -EINVAL; 7927 } 7928 7929 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7930 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7931 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7932 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7933 } 7934 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7935 return 0; 7936 } 7937 7938 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7939 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7940 *direction != IEEE80211_TTLM_DIRECTION_UP && 7941 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7942 return -EINVAL; 7943 7944 link_map_presence = *pos; 7945 pos++; 7946 7947 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7948 map_size = 1; 7949 else 7950 map_size = 2; 7951 7952 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7953 u16 map; 7954 7955 if (link_map_presence & BIT(tid)) { 7956 map = ieee80211_get_ttlm(map_size, pos); 7957 if (!map) { 7958 mlme_dbg(sdata, 7959 "No active links for TID %d", tid); 7960 return -EINVAL; 7961 } 7962 } else { 7963 map = 0; 7964 } 7965 7966 switch (*direction) { 7967 case IEEE80211_TTLM_DIRECTION_BOTH: 7968 neg_ttlm->downlink[tid] = map; 7969 neg_ttlm->uplink[tid] = map; 7970 break; 7971 case IEEE80211_TTLM_DIRECTION_DOWN: 7972 neg_ttlm->downlink[tid] = map; 7973 break; 7974 case IEEE80211_TTLM_DIRECTION_UP: 7975 neg_ttlm->uplink[tid] = map; 7976 break; 7977 default: 7978 return -EINVAL; 7979 } 7980 pos += map_size; 7981 } 7982 return 0; 7983} 7984 7985void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7986 struct ieee80211_mgmt *mgmt, size_t len) 7987{ 7988 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7989 size_t ies_len; 7990 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7991 struct ieee802_11_elems *elems = NULL; 7992 struct ieee80211_neg_ttlm neg_ttlm = {}; 7993 7994 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7995 7996 if (!ieee80211_vif_is_mld(&sdata->vif)) 7997 return; 7998 7999 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 8000 ies_len = len - offsetof(struct ieee80211_mgmt, 8001 u.action.u.ttlm_req.variable); 8002 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 8003 ies_len, 8004 IEEE80211_FTYPE_MGMT | 8005 IEEE80211_STYPE_ACTION, 8006 NULL); 8007 if (!elems) { 8008 ttlm_res = NEG_TTLM_RES_REJECT; 8009 goto out; 8010 } 8011 8012 for (i = 0; i < elems->ttlm_num; i++) { 8013 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 8014 &neg_ttlm, &direction[i]) || 8015 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 8016 elems->ttlm_num != 1)) { 8017 ttlm_res = NEG_TTLM_RES_REJECT; 8018 goto out; 8019 } 8020 } 8021 8022 if (!elems->ttlm_num || 8023 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 8024 ttlm_res = NEG_TTLM_RES_REJECT; 8025 goto out; 8026 } 8027 8028 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8029 if ((neg_ttlm.downlink[i] && 8030 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 8031 (neg_ttlm.uplink[i] && 8032 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 8033 ttlm_res = NEG_TTLM_RES_REJECT; 8034 goto out; 8035 } 8036 } 8037 8038 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8039 8040 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8041 goto out; 8042 8043 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8044out: 8045 kfree(elems); 8046 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8047} 8048 8049void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8050 struct ieee80211_mgmt *mgmt, size_t len) 8051{ 8052 if (!ieee80211_vif_is_mld(&sdata->vif) || 8053 mgmt->u.action.u.ttlm_req.dialog_token != 8054 sdata->u.mgd.dialog_token_alloc) 8055 return; 8056 8057 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8058 &sdata->u.mgd.neg_ttlm_timeout_work); 8059 8060 /* MLD station sends a TID to link mapping request, mainly to handle 8061 * BTM (BSS transition management) request, in which case it needs to 8062 * restrict the active links set. 8063 * In this case it's not expected that the MLD AP will reject the 8064 * negotiated TTLM request. 8065 * This can be better implemented in the future, to handle request 8066 * rejections. 8067 */ 8068 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8069 __ieee80211_disconnect(sdata); 8070} 8071 8072void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8073{ 8074 u16 new_dormant_links; 8075 8076 if (!sdata->vif.neg_ttlm.valid) 8077 return; 8078 8079 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8080 new_dormant_links = 8081 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8082 sdata->vif.suspended_links = 0; 8083 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8084 new_dormant_links); 8085 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8086 BSS_CHANGED_MLD_VALID_LINKS); 8087} 8088 8089static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8090 struct wiphy_work *work) 8091{ 8092 struct ieee80211_sub_if_data *sdata = 8093 container_of(work, struct ieee80211_sub_if_data, 8094 u.mgd.teardown_ttlm_work); 8095 8096 ieee80211_process_ttlm_teardown(sdata); 8097} 8098 8099void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8100{ 8101 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8102 struct ieee80211_local *local = sdata->local; 8103 struct ieee80211_mgmt *mgmt; 8104 struct sk_buff *skb; 8105 int frame_len = offsetofend(struct ieee80211_mgmt, 8106 u.action.u.ttlm_tear_down); 8107 struct ieee80211_tx_info *info; 8108 8109 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8110 if (!skb) 8111 return; 8112 8113 skb_reserve(skb, local->hw.extra_tx_headroom); 8114 mgmt = skb_put_zero(skb, frame_len); 8115 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8116 IEEE80211_STYPE_ACTION); 8117 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8118 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8119 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8120 8121 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8122 mgmt->u.action.u.ttlm_tear_down.action_code = 8123 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8124 8125 info = IEEE80211_SKB_CB(skb); 8126 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8127 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8128 ieee80211_tx_skb(sdata, skb); 8129} 8130EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8131 8132void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8133 struct sk_buff *skb) 8134{ 8135 struct ieee80211_link_data *link = &sdata->deflink; 8136 struct ieee80211_rx_status *rx_status; 8137 struct ieee80211_hdr *hdr; 8138 u16 fc; 8139 8140 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8141 8142 rx_status = (struct ieee80211_rx_status *) skb->cb; 8143 hdr = (struct ieee80211_hdr *) skb->data; 8144 fc = le16_to_cpu(hdr->frame_control); 8145 8146 switch (fc & IEEE80211_FCTL_STYPE) { 8147 case IEEE80211_STYPE_S1G_BEACON: 8148 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8149 break; 8150 } 8151} 8152 8153void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8154 struct sk_buff *skb) 8155{ 8156 struct ieee80211_link_data *link = &sdata->deflink; 8157 struct ieee80211_rx_status *rx_status; 8158 struct ieee802_11_elems *elems; 8159 struct ieee80211_mgmt *mgmt; 8160 u16 fc; 8161 int ies_len; 8162 8163 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8164 8165 rx_status = (struct ieee80211_rx_status *) skb->cb; 8166 mgmt = (struct ieee80211_mgmt *) skb->data; 8167 fc = le16_to_cpu(mgmt->frame_control); 8168 8169 if (rx_status->link_valid) { 8170 link = sdata_dereference(sdata->link[rx_status->link_id], 8171 sdata); 8172 if (!link) 8173 return; 8174 } 8175 8176 switch (fc & IEEE80211_FCTL_STYPE) { 8177 case IEEE80211_STYPE_BEACON: 8178 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8179 skb->len, rx_status); 8180 break; 8181 case IEEE80211_STYPE_PROBE_RESP: 8182 ieee80211_rx_mgmt_probe_resp(link, skb); 8183 break; 8184 case IEEE80211_STYPE_AUTH: 8185 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8186 break; 8187 case IEEE80211_STYPE_DEAUTH: 8188 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8189 break; 8190 case IEEE80211_STYPE_DISASSOC: 8191 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8192 break; 8193 case IEEE80211_STYPE_ASSOC_RESP: 8194 case IEEE80211_STYPE_REASSOC_RESP: 8195 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8196 break; 8197 case IEEE80211_STYPE_ACTION: 8198 if (!sdata->u.mgd.associated || 8199 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8200 break; 8201 8202 switch (mgmt->u.action.category) { 8203 case WLAN_CATEGORY_SPECTRUM_MGMT: 8204 ies_len = skb->len - 8205 offsetof(struct ieee80211_mgmt, 8206 u.action.u.chan_switch.variable); 8207 8208 if (ies_len < 0) 8209 break; 8210 8211 /* CSA IE cannot be overridden, no need for BSSID */ 8212 elems = ieee802_11_parse_elems(mgmt->u.action.u.chan_switch.variable, 8213 ies_len, 8214 IEEE80211_FTYPE_MGMT | 8215 IEEE80211_STYPE_ACTION, 8216 NULL); 8217 8218 if (elems && !elems->parse_error) { 8219 enum ieee80211_csa_source src = 8220 IEEE80211_CSA_SOURCE_PROT_ACTION; 8221 8222 ieee80211_sta_process_chanswitch(link, 8223 rx_status->mactime, 8224 rx_status->device_timestamp, 8225 elems, elems, 8226 src); 8227 } 8228 kfree(elems); 8229 break; 8230 case WLAN_CATEGORY_PUBLIC: 8231 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8232 ies_len = skb->len - 8233 offsetof(struct ieee80211_mgmt, 8234 u.action.u.ext_chan_switch.variable); 8235 8236 if (ies_len < 0) 8237 break; 8238 8239 /* 8240 * extended CSA IE can't be overridden, no need for 8241 * BSSID 8242 */ 8243 elems = ieee802_11_parse_elems(mgmt->u.action.u.ext_chan_switch.variable, 8244 ies_len, 8245 IEEE80211_FTYPE_MGMT | 8246 IEEE80211_STYPE_ACTION, 8247 NULL); 8248 8249 if (elems && !elems->parse_error) { 8250 enum ieee80211_csa_source src; 8251 8252 if (mgmt->u.action.category == 8253 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8254 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8255 else 8256 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8257 8258 /* for the handling code pretend it was an IE */ 8259 elems->ext_chansw_ie = 8260 &mgmt->u.action.u.ext_chan_switch.data; 8261 8262 ieee80211_sta_process_chanswitch(link, 8263 rx_status->mactime, 8264 rx_status->device_timestamp, 8265 elems, elems, 8266 src); 8267 } 8268 8269 kfree(elems); 8270 break; 8271 } 8272 break; 8273 } 8274} 8275 8276static void ieee80211_sta_timer(struct timer_list *t) 8277{ 8278 struct ieee80211_sub_if_data *sdata = 8279 timer_container_of(sdata, t, u.mgd.timer); 8280 8281 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8282} 8283 8284void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8285 u8 reason, bool tx) 8286{ 8287 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8288 8289 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8290 tx, frame_buf); 8291 8292 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8293 reason, false); 8294} 8295 8296static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8297{ 8298 struct ieee80211_local *local = sdata->local; 8299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8300 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8301 u32 tx_flags = 0; 8302 u16 trans = 1; 8303 u16 status = 0; 8304 struct ieee80211_prep_tx_info info = { 8305 .subtype = IEEE80211_STYPE_AUTH, 8306 }; 8307 8308 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8309 8310 if (WARN_ON_ONCE(!auth_data)) 8311 return -EINVAL; 8312 8313 auth_data->tries++; 8314 8315 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8316 sdata_info(sdata, "authentication with %pM timed out\n", 8317 auth_data->ap_addr); 8318 8319 /* 8320 * Most likely AP is not in the range so remove the 8321 * bss struct for that AP. 8322 */ 8323 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8324 8325 return -ETIMEDOUT; 8326 } 8327 8328 if (auth_data->algorithm == WLAN_AUTH_SAE) 8329 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8330 8331 info.link_id = auth_data->link_id; 8332 drv_mgd_prepare_tx(local, sdata, &info); 8333 8334 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8335 auth_data->ap_addr, auth_data->tries, 8336 IEEE80211_AUTH_MAX_TRIES); 8337 8338 auth_data->expected_transaction = 2; 8339 8340 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8341 trans = auth_data->sae_trans; 8342 status = auth_data->sae_status; 8343 auth_data->expected_transaction = trans; 8344 } 8345 8346 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8347 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8348 IEEE80211_TX_INTFL_MLME_CONN_TX; 8349 8350 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8351 auth_data->data, auth_data->data_len, 8352 auth_data->ap_addr, auth_data->ap_addr, 8353 NULL, 0, 0, tx_flags); 8354 8355 if (tx_flags == 0) { 8356 if (auth_data->algorithm == WLAN_AUTH_SAE) 8357 auth_data->timeout = jiffies + 8358 IEEE80211_AUTH_TIMEOUT_SAE; 8359 else 8360 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8361 } else { 8362 auth_data->timeout = 8363 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8364 } 8365 8366 auth_data->timeout_started = true; 8367 run_again(sdata, auth_data->timeout); 8368 8369 return 0; 8370} 8371 8372static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8373{ 8374 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8375 struct ieee80211_local *local = sdata->local; 8376 int ret; 8377 8378 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8379 8380 assoc_data->tries++; 8381 assoc_data->comeback = false; 8382 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8383 sdata_info(sdata, "association with %pM timed out\n", 8384 assoc_data->ap_addr); 8385 8386 /* 8387 * Most likely AP is not in the range so remove the 8388 * bss struct for that AP. 8389 */ 8390 cfg80211_unlink_bss(local->hw.wiphy, 8391 assoc_data->link[assoc_data->assoc_link_id].bss); 8392 8393 return -ETIMEDOUT; 8394 } 8395 8396 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8397 assoc_data->ap_addr, assoc_data->tries, 8398 IEEE80211_ASSOC_MAX_TRIES); 8399 ret = ieee80211_send_assoc(sdata); 8400 if (ret) 8401 return ret; 8402 8403 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8404 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8405 assoc_data->timeout_started = true; 8406 run_again(sdata, assoc_data->timeout); 8407 } else { 8408 assoc_data->timeout = 8409 round_jiffies_up(jiffies + 8410 IEEE80211_ASSOC_TIMEOUT_LONG); 8411 assoc_data->timeout_started = true; 8412 run_again(sdata, assoc_data->timeout); 8413 } 8414 8415 return 0; 8416} 8417 8418void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8419 __le16 fc, bool acked) 8420{ 8421 struct ieee80211_local *local = sdata->local; 8422 8423 sdata->u.mgd.status_fc = fc; 8424 sdata->u.mgd.status_acked = acked; 8425 sdata->u.mgd.status_received = true; 8426 8427 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8428} 8429 8430void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8431{ 8432 struct ieee80211_local *local = sdata->local; 8433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8434 8435 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8436 8437 if (ifmgd->status_received) { 8438 __le16 fc = ifmgd->status_fc; 8439 bool status_acked = ifmgd->status_acked; 8440 8441 ifmgd->status_received = false; 8442 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8443 if (status_acked) { 8444 if (ifmgd->auth_data->algorithm == 8445 WLAN_AUTH_SAE) 8446 ifmgd->auth_data->timeout = 8447 jiffies + 8448 IEEE80211_AUTH_TIMEOUT_SAE; 8449 else 8450 ifmgd->auth_data->timeout = 8451 jiffies + 8452 IEEE80211_AUTH_TIMEOUT_SHORT; 8453 run_again(sdata, ifmgd->auth_data->timeout); 8454 } else { 8455 ifmgd->auth_data->timeout = jiffies - 1; 8456 } 8457 ifmgd->auth_data->timeout_started = true; 8458 } else if (ifmgd->assoc_data && 8459 !ifmgd->assoc_data->comeback && 8460 (ieee80211_is_assoc_req(fc) || 8461 ieee80211_is_reassoc_req(fc))) { 8462 /* 8463 * Update association timeout based on the TX status 8464 * for the (Re)Association Request frame. Skip this if 8465 * we have already processed a (Re)Association Response 8466 * frame that indicated need for association comeback 8467 * at a specific time in the future. This could happen 8468 * if the TX status information is delayed enough for 8469 * the response to be received and processed first. 8470 */ 8471 if (status_acked) { 8472 ifmgd->assoc_data->timeout = 8473 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8474 run_again(sdata, ifmgd->assoc_data->timeout); 8475 } else { 8476 ifmgd->assoc_data->timeout = jiffies - 1; 8477 } 8478 ifmgd->assoc_data->timeout_started = true; 8479 } 8480 } 8481 8482 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8483 time_after(jiffies, ifmgd->auth_data->timeout)) { 8484 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8485 /* 8486 * ok ... we waited for assoc or continuation but 8487 * userspace didn't do it, so kill the auth data 8488 */ 8489 ieee80211_destroy_auth_data(sdata, false); 8490 } else if (ieee80211_auth(sdata)) { 8491 u8 ap_addr[ETH_ALEN]; 8492 struct ieee80211_event event = { 8493 .type = MLME_EVENT, 8494 .u.mlme.data = AUTH_EVENT, 8495 .u.mlme.status = MLME_TIMEOUT, 8496 }; 8497 8498 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8499 8500 ieee80211_destroy_auth_data(sdata, false); 8501 8502 cfg80211_auth_timeout(sdata->dev, ap_addr); 8503 drv_event_callback(sdata->local, sdata, &event); 8504 } 8505 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8506 run_again(sdata, ifmgd->auth_data->timeout); 8507 8508 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8509 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8510 if ((ifmgd->assoc_data->need_beacon && 8511 !sdata->deflink.u.mgd.have_beacon) || 8512 ieee80211_do_assoc(sdata)) { 8513 struct ieee80211_event event = { 8514 .type = MLME_EVENT, 8515 .u.mlme.data = ASSOC_EVENT, 8516 .u.mlme.status = MLME_TIMEOUT, 8517 }; 8518 8519 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8520 drv_event_callback(sdata->local, sdata, &event); 8521 } 8522 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8523 run_again(sdata, ifmgd->assoc_data->timeout); 8524 8525 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8526 ifmgd->associated) { 8527 u8 *bssid = sdata->deflink.u.mgd.bssid; 8528 int max_tries; 8529 8530 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8531 max_tries = max_nullfunc_tries; 8532 else 8533 max_tries = max_probe_tries; 8534 8535 /* ACK received for nullfunc probing frame */ 8536 if (!ifmgd->probe_send_count) 8537 ieee80211_reset_ap_probe(sdata); 8538 else if (ifmgd->nullfunc_failed) { 8539 if (ifmgd->probe_send_count < max_tries) { 8540 mlme_dbg(sdata, 8541 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8542 bssid, ifmgd->probe_send_count, 8543 max_tries); 8544 ieee80211_mgd_probe_ap_send(sdata); 8545 } else { 8546 mlme_dbg(sdata, 8547 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8548 bssid); 8549 ieee80211_sta_connection_lost(sdata, 8550 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8551 false); 8552 } 8553 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8554 run_again(sdata, ifmgd->probe_timeout); 8555 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8556 mlme_dbg(sdata, 8557 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8558 bssid, probe_wait_ms); 8559 ieee80211_sta_connection_lost(sdata, 8560 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8561 } else if (ifmgd->probe_send_count < max_tries) { 8562 mlme_dbg(sdata, 8563 "No probe response from AP %pM after %dms, try %d/%i\n", 8564 bssid, probe_wait_ms, 8565 ifmgd->probe_send_count, max_tries); 8566 ieee80211_mgd_probe_ap_send(sdata); 8567 } else { 8568 /* 8569 * We actually lost the connection ... or did we? 8570 * Let's make sure! 8571 */ 8572 mlme_dbg(sdata, 8573 "No probe response from AP %pM after %dms, disconnecting.\n", 8574 bssid, probe_wait_ms); 8575 8576 ieee80211_sta_connection_lost(sdata, 8577 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8578 } 8579 } 8580} 8581 8582static bool 8583ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8584{ 8585 /* 8586 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8587 * the links. 8588 */ 8589 struct ieee80211_link_data *link; 8590 8591 guard(rcu)(); 8592 8593 for_each_link_data_rcu(sdata, link) { 8594 if (!(link->conf->csa_active && 8595 !link->u.mgd.csa.waiting_bcn)) 8596 return false; 8597 } 8598 8599 return true; 8600} 8601 8602static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8603{ 8604 struct ieee80211_sub_if_data *sdata = 8605 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8606 8607 if (ieee80211_is_csa_in_progress(sdata)) 8608 return; 8609 8610 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8611 return; 8612 8613 sdata->u.mgd.connection_loss = false; 8614 wiphy_work_queue(sdata->local->hw.wiphy, 8615 &sdata->u.mgd.beacon_connection_loss_work); 8616} 8617 8618static unsigned long 8619ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8620{ 8621 unsigned long latest_timeout = jiffies; 8622 unsigned int link_id; 8623 struct sta_info *sta; 8624 8625 guard(rcu)(); 8626 8627 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8628 if (!sta) 8629 return 0; 8630 8631 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8632 link_id++) { 8633 struct link_sta_info *link_sta; 8634 unsigned long timeout; 8635 8636 link_sta = rcu_dereference(sta->link[link_id]); 8637 if (!link_sta) 8638 continue; 8639 8640 timeout = link_sta->status_stats.last_ack; 8641 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8642 timeout = link_sta->rx_stats.last_rx; 8643 8644 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8645 8646 /* 8647 * latest_timeout holds the timeout of the link 8648 * that will expire last among all links in an 8649 * non-AP MLD STA. This ensures that the connection 8650 * monitor timer is only reset if at least one link 8651 * is still active, and it is scheduled to fire at 8652 * the latest possible timeout. 8653 */ 8654 if (time_after(timeout, latest_timeout)) 8655 latest_timeout = timeout; 8656 } 8657 8658 return latest_timeout; 8659} 8660 8661static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8662{ 8663 struct ieee80211_sub_if_data *sdata = 8664 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8665 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8666 struct ieee80211_local *local = sdata->local; 8667 unsigned long latest_timeout; 8668 8669 if (ieee80211_is_csa_in_progress(sdata)) 8670 return; 8671 8672 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8673 8674 /* 8675 * If latest timeout is after now, then update timer to fire at 8676 * the later date, but do not actually probe at this time. 8677 */ 8678 if (time_is_after_jiffies(latest_timeout)) { 8679 mod_timer(&ifmgd->conn_mon_timer, 8680 round_jiffies_up(latest_timeout)); 8681 return; 8682 } 8683 8684 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8685} 8686 8687static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8688 struct wiphy_work *work) 8689{ 8690 struct ieee80211_sub_if_data *sdata = 8691 container_of(work, struct ieee80211_sub_if_data, 8692 u.mgd.monitor_work); 8693 8694 ieee80211_mgd_probe_ap(sdata, false); 8695} 8696 8697static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8698{ 8699 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8700 __ieee80211_stop_poll(sdata); 8701 8702 /* let's probe the connection once */ 8703 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8704 wiphy_work_queue(sdata->local->hw.wiphy, 8705 &sdata->u.mgd.monitor_work); 8706 } 8707} 8708 8709#ifdef CONFIG_PM 8710void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8711{ 8712 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8713 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8714 8715 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8716 8717 if (ifmgd->auth_data || ifmgd->assoc_data) { 8718 const u8 *ap_addr = ifmgd->auth_data ? 8719 ifmgd->auth_data->ap_addr : 8720 ifmgd->assoc_data->ap_addr; 8721 8722 /* 8723 * If we are trying to authenticate / associate while suspending, 8724 * cfg80211 won't know and won't actually abort those attempts, 8725 * thus we need to do that ourselves. 8726 */ 8727 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8728 IEEE80211_STYPE_DEAUTH, 8729 WLAN_REASON_DEAUTH_LEAVING, 8730 false, frame_buf); 8731 if (ifmgd->assoc_data) 8732 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8733 if (ifmgd->auth_data) 8734 ieee80211_destroy_auth_data(sdata, false); 8735 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8736 IEEE80211_DEAUTH_FRAME_LEN, 8737 false); 8738 } 8739 8740 /* This is a bit of a hack - we should find a better and more generic 8741 * solution to this. Normally when suspending, cfg80211 will in fact 8742 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8743 * auth (not so important) or assoc (this is the problem) process. 8744 * 8745 * As a consequence, it can happen that we are in the process of both 8746 * associating and suspending, and receive an association response 8747 * after cfg80211 has checked if it needs to disconnect, but before 8748 * we actually set the flag to drop incoming frames. This will then 8749 * cause the workqueue flush to process the association response in 8750 * the suspend, resulting in a successful association just before it 8751 * tries to remove the interface from the driver, which now though 8752 * has a channel context assigned ... this results in issues. 8753 * 8754 * To work around this (for now) simply deauth here again if we're 8755 * now connected. 8756 */ 8757 if (ifmgd->associated && !sdata->local->wowlan) { 8758 u8 bssid[ETH_ALEN]; 8759 struct cfg80211_deauth_request req = { 8760 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8761 .bssid = bssid, 8762 }; 8763 8764 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8765 ieee80211_mgd_deauth(sdata, &req); 8766 } 8767} 8768#endif 8769 8770void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8771{ 8772 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8773 8774 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8775 8776 if (!ifmgd->associated) 8777 return; 8778 8779 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8780 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8781 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8782 ieee80211_sta_connection_lost(sdata, 8783 WLAN_REASON_UNSPECIFIED, 8784 true); 8785 return; 8786 } 8787 8788 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8789 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8790 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8791 ieee80211_sta_connection_lost(sdata, 8792 WLAN_REASON_UNSPECIFIED, 8793 true); 8794 return; 8795 } 8796} 8797 8798static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8799 struct wiphy_work *work) 8800{ 8801 struct ieee80211_link_data *link = 8802 container_of(work, struct ieee80211_link_data, 8803 u.mgd.request_smps_work); 8804 8805 __ieee80211_request_smps_mgd(link->sdata, link, 8806 link->u.mgd.driver_smps_mode); 8807} 8808 8809static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8810 struct wiphy_work *work) 8811{ 8812 struct ieee80211_sub_if_data *sdata = 8813 container_of(work, struct ieee80211_sub_if_data, 8814 u.mgd.reconf.wk.work); 8815 8816 if (!sdata->u.mgd.reconf.added_links && 8817 !sdata->u.mgd.reconf.removed_links) 8818 return; 8819 8820 sdata_info(sdata, 8821 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8822 sdata->u.mgd.reconf.added_links, 8823 sdata->u.mgd.reconf.removed_links); 8824 8825 __ieee80211_disconnect(sdata); 8826} 8827 8828/* interface setup */ 8829void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8830{ 8831 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8832 8833 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8834 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8835 ieee80211_beacon_connection_loss_work); 8836 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8837 ieee80211_csa_connection_drop_work); 8838 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8839 ieee80211_tdls_peer_del_work); 8840 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 8841 ieee80211_ml_reconf_work); 8842 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8843 ieee80211_ml_sta_reconf_timeout); 8844 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8845 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8846 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8847 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8848 ieee80211_sta_handle_tspec_ac_params_wk); 8849 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 8850 ieee80211_tid_to_link_map_work); 8851 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8852 ieee80211_neg_ttlm_timeout_work); 8853 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8854 ieee80211_teardown_ttlm_work); 8855 8856 ifmgd->flags = 0; 8857 ifmgd->powersave = sdata->wdev.ps; 8858 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8859 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8860 /* Setup TDLS data */ 8861 spin_lock_init(&ifmgd->teardown_lock); 8862 ifmgd->teardown_skb = NULL; 8863 ifmgd->orig_teardown_skb = NULL; 8864 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8865} 8866 8867static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8868 struct wiphy_work *work) 8869{ 8870 struct ieee80211_link_data *link = 8871 container_of(work, struct ieee80211_link_data, 8872 u.mgd.recalc_smps); 8873 8874 ieee80211_recalc_smps(link->sdata, link); 8875} 8876 8877void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8878{ 8879 struct ieee80211_sub_if_data *sdata = link->sdata; 8880 struct ieee80211_local *local = sdata->local; 8881 unsigned int link_id = link->link_id; 8882 8883 link->u.mgd.p2p_noa_index = -1; 8884 link->conf->bssid = link->u.mgd.bssid; 8885 link->smps_mode = IEEE80211_SMPS_OFF; 8886 8887 wiphy_work_init(&link->u.mgd.request_smps_work, 8888 ieee80211_request_smps_mgd_work); 8889 wiphy_work_init(&link->u.mgd.recalc_smps, 8890 ieee80211_recalc_smps_work); 8891 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8892 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8893 else 8894 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8895 8896 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 8897 ieee80211_csa_switch_work); 8898 8899 ieee80211_clear_tpe(&link->conf->tpe); 8900 8901 if (sdata->u.mgd.assoc_data) 8902 ether_addr_copy(link->conf->addr, 8903 sdata->u.mgd.assoc_data->link[link_id].addr); 8904 else if (sdata->u.mgd.reconf.add_links_data) 8905 ether_addr_copy(link->conf->addr, 8906 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8907 else if (!is_valid_ether_addr(link->conf->addr)) 8908 eth_random_addr(link->conf->addr); 8909} 8910 8911/* scan finished notification */ 8912void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8913{ 8914 struct ieee80211_sub_if_data *sdata; 8915 8916 /* Restart STA timers */ 8917 rcu_read_lock(); 8918 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8919 if (ieee80211_sdata_running(sdata)) 8920 ieee80211_restart_sta_timer(sdata); 8921 } 8922 rcu_read_unlock(); 8923} 8924 8925static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8926 struct cfg80211_bss *cbss, s8 link_id, 8927 const u8 *ap_mld_addr, bool assoc, 8928 struct ieee80211_conn_settings *conn, 8929 bool override, 8930 unsigned long *userspace_selectors) 8931{ 8932 struct ieee80211_local *local = sdata->local; 8933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8934 struct ieee80211_bss *bss = (void *)cbss->priv; 8935 struct sta_info *new_sta = NULL; 8936 struct ieee80211_link_data *link; 8937 bool have_sta = false; 8938 bool mlo; 8939 int err; 8940 u16 new_links; 8941 8942 if (link_id >= 0) { 8943 mlo = true; 8944 if (WARN_ON(!ap_mld_addr)) 8945 return -EINVAL; 8946 new_links = BIT(link_id); 8947 } else { 8948 if (WARN_ON(ap_mld_addr)) 8949 return -EINVAL; 8950 ap_mld_addr = cbss->bssid; 8951 new_links = 0; 8952 link_id = 0; 8953 mlo = false; 8954 } 8955 8956 if (assoc) { 8957 rcu_read_lock(); 8958 have_sta = sta_info_get(sdata, ap_mld_addr); 8959 rcu_read_unlock(); 8960 } 8961 8962 if (mlo && !have_sta && 8963 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8964 return -EINVAL; 8965 8966 err = ieee80211_vif_set_links(sdata, new_links, 0); 8967 if (err) 8968 return err; 8969 8970 link = sdata_dereference(sdata->link[link_id], sdata); 8971 if (WARN_ON(!link)) { 8972 err = -ENOLINK; 8973 goto out_err; 8974 } 8975 8976 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8977 err = -EINVAL; 8978 goto out_err; 8979 } 8980 8981 /* If a reconfig is happening, bail out */ 8982 if (local->in_reconfig) { 8983 err = -EBUSY; 8984 goto out_err; 8985 } 8986 8987 if (!have_sta) { 8988 if (mlo) 8989 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8990 link_id, cbss->bssid, 8991 GFP_KERNEL); 8992 else 8993 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8994 8995 if (!new_sta) { 8996 err = -ENOMEM; 8997 goto out_err; 8998 } 8999 9000 new_sta->sta.mlo = mlo; 9001 } 9002 9003 /* 9004 * Set up the information for the new channel before setting the 9005 * new channel. We can't - completely race-free - change the basic 9006 * rates bitmap and the channel (sband) that it refers to, but if 9007 * we set it up before we at least avoid calling into the driver's 9008 * bss_info_changed() method with invalid information (since we do 9009 * call that from changing the channel - only for IDLE and perhaps 9010 * some others, but ...). 9011 * 9012 * So to avoid that, just set up all the new information before the 9013 * channel, but tell the driver to apply it only afterwards, since 9014 * it might need the new channel for that. 9015 */ 9016 if (new_sta) { 9017 const struct cfg80211_bss_ies *ies; 9018 struct link_sta_info *link_sta; 9019 9020 rcu_read_lock(); 9021 link_sta = rcu_dereference(new_sta->link[link_id]); 9022 if (WARN_ON(!link_sta)) { 9023 rcu_read_unlock(); 9024 sta_info_free(local, new_sta); 9025 err = -EINVAL; 9026 goto out_err; 9027 } 9028 9029 err = ieee80211_mgd_setup_link_sta(link, new_sta, 9030 link_sta, cbss); 9031 if (err) { 9032 rcu_read_unlock(); 9033 sta_info_free(local, new_sta); 9034 goto out_err; 9035 } 9036 9037 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9038 9039 /* set timing information */ 9040 link->conf->beacon_int = cbss->beacon_interval; 9041 ies = rcu_dereference(cbss->beacon_ies); 9042 if (ies) { 9043 link->conf->sync_tsf = ies->tsf; 9044 link->conf->sync_device_ts = 9045 bss->device_ts_beacon; 9046 9047 ieee80211_get_dtim(ies, 9048 &link->conf->sync_dtim_count, 9049 NULL); 9050 } else if (!ieee80211_hw_check(&sdata->local->hw, 9051 TIMING_BEACON_ONLY)) { 9052 ies = rcu_dereference(cbss->proberesp_ies); 9053 /* must be non-NULL since beacon IEs were NULL */ 9054 link->conf->sync_tsf = ies->tsf; 9055 link->conf->sync_device_ts = 9056 bss->device_ts_presp; 9057 link->conf->sync_dtim_count = 0; 9058 } else { 9059 link->conf->sync_tsf = 0; 9060 link->conf->sync_device_ts = 0; 9061 link->conf->sync_dtim_count = 0; 9062 } 9063 rcu_read_unlock(); 9064 } 9065 9066 if (new_sta || override) { 9067 /* 9068 * Only set this if we're also going to calculate the AP 9069 * settings etc., otherwise this was set before in a 9070 * previous call. Note override is set to %true in assoc 9071 * if the settings were changed. 9072 */ 9073 link->u.mgd.conn = *conn; 9074 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9075 mlo, &link->u.mgd.conn, 9076 userspace_selectors); 9077 if (err) { 9078 if (new_sta) 9079 sta_info_free(local, new_sta); 9080 goto out_err; 9081 } 9082 /* pass out for use in assoc */ 9083 *conn = link->u.mgd.conn; 9084 } 9085 9086 if (new_sta) { 9087 /* 9088 * tell driver about BSSID, basic rates and timing 9089 * this was set up above, before setting the channel 9090 */ 9091 ieee80211_link_info_change_notify(sdata, link, 9092 BSS_CHANGED_BSSID | 9093 BSS_CHANGED_BASIC_RATES | 9094 BSS_CHANGED_BEACON_INT); 9095 9096 if (assoc) 9097 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9098 9099 err = sta_info_insert(new_sta); 9100 new_sta = NULL; 9101 if (err) { 9102 sdata_info(sdata, 9103 "failed to insert STA entry for the AP (error %d)\n", 9104 err); 9105 goto out_release_chan; 9106 } 9107 } else 9108 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9109 9110 /* Cancel scan to ensure that nothing interferes with connection */ 9111 if (local->scanning) 9112 ieee80211_scan_cancel(local); 9113 9114 return 0; 9115 9116out_release_chan: 9117 ieee80211_link_release_channel(link); 9118out_err: 9119 ieee80211_vif_set_links(sdata, 0, 0); 9120 return err; 9121} 9122 9123static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9124 const struct cfg80211_bss_ies *ies, 9125 u8 cur_channel, bool ignore_ecsa) 9126{ 9127 const struct element *csa_elem, *ecsa_elem; 9128 struct ieee80211_channel_sw_ie *csa = NULL; 9129 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9130 9131 if (!ies) 9132 return false; 9133 9134 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9135 ies->data, ies->len); 9136 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9137 csa = (void *)csa_elem->data; 9138 9139 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9140 ies->data, ies->len); 9141 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9142 ecsa = (void *)ecsa_elem->data; 9143 9144 if (csa && csa->count == 0) 9145 csa = NULL; 9146 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9147 csa = NULL; 9148 9149 if (ecsa && ecsa->count == 0) 9150 ecsa = NULL; 9151 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9152 ecsa = NULL; 9153 9154 if (ignore_ecsa && ecsa) { 9155 sdata_info(sdata, 9156 "Ignoring ECSA in probe response - was considered stuck!\n"); 9157 return csa; 9158 } 9159 9160 return csa || ecsa; 9161} 9162 9163static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9164 struct cfg80211_bss *bss) 9165{ 9166 u8 cur_channel; 9167 bool ret; 9168 9169 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9170 9171 rcu_read_lock(); 9172 if (ieee80211_mgd_csa_present(sdata, 9173 rcu_dereference(bss->beacon_ies), 9174 cur_channel, false)) { 9175 ret = true; 9176 goto out; 9177 } 9178 9179 if (ieee80211_mgd_csa_present(sdata, 9180 rcu_dereference(bss->proberesp_ies), 9181 cur_channel, bss->proberesp_ecsa_stuck)) { 9182 ret = true; 9183 goto out; 9184 } 9185 9186 ret = false; 9187out: 9188 rcu_read_unlock(); 9189 return ret; 9190} 9191 9192static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9193 const u8 *supported_selectors, 9194 u8 supported_selectors_len) 9195{ 9196 if (supported_selectors) { 9197 for (int i = 0; i < supported_selectors_len; i++) { 9198 set_bit(supported_selectors[i], 9199 userspace_selectors); 9200 } 9201 } else { 9202 /* Assume SAE_H2E support for backward compatibility. */ 9203 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9204 userspace_selectors); 9205 } 9206} 9207 9208/* config hooks */ 9209int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9210 struct cfg80211_auth_request *req) 9211{ 9212 struct ieee80211_local *local = sdata->local; 9213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9214 struct ieee80211_mgd_auth_data *auth_data; 9215 struct ieee80211_conn_settings conn; 9216 struct ieee80211_link_data *link; 9217 struct ieee80211_supported_band *sband; 9218 struct ieee80211_bss *bss; 9219 u16 auth_alg; 9220 int err; 9221 bool cont_auth, wmm_used; 9222 9223 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9224 9225 /* prepare auth data structure */ 9226 9227 switch (req->auth_type) { 9228 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9229 auth_alg = WLAN_AUTH_OPEN; 9230 break; 9231 case NL80211_AUTHTYPE_SHARED_KEY: 9232 if (fips_enabled) 9233 return -EOPNOTSUPP; 9234 auth_alg = WLAN_AUTH_SHARED_KEY; 9235 break; 9236 case NL80211_AUTHTYPE_FT: 9237 auth_alg = WLAN_AUTH_FT; 9238 break; 9239 case NL80211_AUTHTYPE_NETWORK_EAP: 9240 auth_alg = WLAN_AUTH_LEAP; 9241 break; 9242 case NL80211_AUTHTYPE_SAE: 9243 auth_alg = WLAN_AUTH_SAE; 9244 break; 9245 case NL80211_AUTHTYPE_FILS_SK: 9246 auth_alg = WLAN_AUTH_FILS_SK; 9247 break; 9248 case NL80211_AUTHTYPE_FILS_SK_PFS: 9249 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9250 break; 9251 case NL80211_AUTHTYPE_FILS_PK: 9252 auth_alg = WLAN_AUTH_FILS_PK; 9253 break; 9254 default: 9255 return -EOPNOTSUPP; 9256 } 9257 9258 if (ifmgd->assoc_data) 9259 return -EBUSY; 9260 9261 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9262 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9263 return -EINVAL; 9264 } 9265 9266 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9267 req->ie_len, GFP_KERNEL); 9268 if (!auth_data) 9269 return -ENOMEM; 9270 9271 memcpy(auth_data->ap_addr, 9272 req->ap_mld_addr ?: req->bss->bssid, 9273 ETH_ALEN); 9274 auth_data->bss = req->bss; 9275 auth_data->link_id = req->link_id; 9276 9277 if (req->auth_data_len >= 4) { 9278 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9279 __le16 *pos = (__le16 *) req->auth_data; 9280 9281 auth_data->sae_trans = le16_to_cpu(pos[0]); 9282 auth_data->sae_status = le16_to_cpu(pos[1]); 9283 } 9284 memcpy(auth_data->data, req->auth_data + 4, 9285 req->auth_data_len - 4); 9286 auth_data->data_len += req->auth_data_len - 4; 9287 } 9288 9289 /* Check if continuing authentication or trying to authenticate with the 9290 * same BSS that we were in the process of authenticating with and avoid 9291 * removal and re-addition of the STA entry in 9292 * ieee80211_prep_connection(). 9293 */ 9294 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9295 ifmgd->auth_data->link_id == req->link_id; 9296 9297 if (req->ie && req->ie_len) { 9298 memcpy(&auth_data->data[auth_data->data_len], 9299 req->ie, req->ie_len); 9300 auth_data->data_len += req->ie_len; 9301 } 9302 9303 if (req->key && req->key_len) { 9304 auth_data->key_len = req->key_len; 9305 auth_data->key_idx = req->key_idx; 9306 memcpy(auth_data->key, req->key, req->key_len); 9307 } 9308 9309 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9310 req->supported_selectors, 9311 req->supported_selectors_len); 9312 9313 auth_data->algorithm = auth_alg; 9314 9315 /* try to authenticate/probe */ 9316 9317 if (ifmgd->auth_data) { 9318 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9319 auth_data->peer_confirmed = 9320 ifmgd->auth_data->peer_confirmed; 9321 } 9322 ieee80211_destroy_auth_data(sdata, cont_auth); 9323 } 9324 9325 /* prep auth_data so we don't go into idle on disassoc */ 9326 ifmgd->auth_data = auth_data; 9327 9328 /* If this is continuation of an ongoing SAE authentication exchange 9329 * (i.e., request to send SAE Confirm) and the peer has already 9330 * confirmed, mark authentication completed since we are about to send 9331 * out SAE Confirm. 9332 */ 9333 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9334 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9335 ieee80211_mark_sta_auth(sdata); 9336 9337 if (ifmgd->associated) { 9338 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9339 9340 sdata_info(sdata, 9341 "disconnect from AP %pM for new auth to %pM\n", 9342 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9343 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9344 WLAN_REASON_UNSPECIFIED, 9345 false, frame_buf); 9346 9347 ieee80211_report_disconnect(sdata, frame_buf, 9348 sizeof(frame_buf), true, 9349 WLAN_REASON_UNSPECIFIED, 9350 false); 9351 } 9352 9353 /* needed for transmitting the auth frame(s) properly */ 9354 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9355 9356 bss = (void *)req->bss->priv; 9357 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9358 9359 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9360 9361 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9362 &conn); 9363 9364 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9365 req->ap_mld_addr, cont_auth, 9366 &conn, false, 9367 auth_data->userspace_selectors); 9368 if (err) 9369 goto err_clear; 9370 9371 if (req->link_id >= 0) 9372 link = sdata_dereference(sdata->link[req->link_id], sdata); 9373 else 9374 link = &sdata->deflink; 9375 9376 if (WARN_ON(!link)) { 9377 err = -ENOLINK; 9378 goto err_clear; 9379 } 9380 9381 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9382 auth_data->ap_addr, link->conf->addr); 9383 9384 err = ieee80211_auth(sdata); 9385 if (err) { 9386 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9387 goto err_clear; 9388 } 9389 9390 /* hold our own reference */ 9391 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9392 return 0; 9393 9394 err_clear: 9395 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9396 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9397 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9398 BSS_CHANGED_BSSID); 9399 ieee80211_link_release_channel(&sdata->deflink); 9400 } 9401 ifmgd->auth_data = NULL; 9402 kfree(auth_data); 9403 return err; 9404} 9405 9406static void 9407ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9408 struct ieee80211_mgd_assoc_data *assoc_data, 9409 struct cfg80211_assoc_request *req, 9410 struct ieee80211_conn_settings *conn, 9411 unsigned int link_id) 9412{ 9413 struct ieee80211_local *local = sdata->local; 9414 const struct cfg80211_bss_ies *bss_ies; 9415 struct ieee80211_supported_band *sband; 9416 struct ieee80211_link_data *link; 9417 struct cfg80211_bss *cbss; 9418 struct ieee80211_bss *bss; 9419 9420 cbss = assoc_data->link[link_id].bss; 9421 if (WARN_ON(!cbss)) 9422 return; 9423 9424 bss = (void *)cbss->priv; 9425 9426 sband = local->hw.wiphy->bands[cbss->channel->band]; 9427 if (WARN_ON(!sband)) 9428 return; 9429 9430 link = sdata_dereference(sdata->link[link_id], sdata); 9431 if (WARN_ON(!link)) 9432 return; 9433 9434 /* for MLO connections assume advertising all rates is OK */ 9435 if (!req->ap_mld_addr) { 9436 assoc_data->supp_rates = bss->supp_rates; 9437 assoc_data->supp_rates_len = bss->supp_rates_len; 9438 } 9439 9440 /* copy and link elems for the STA profile */ 9441 if (req->links[link_id].elems_len) { 9442 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9443 req->links[link_id].elems_len); 9444 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9445 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9446 assoc_data->ie_pos += req->links[link_id].elems_len; 9447 } 9448 9449 link->u.mgd.beacon_crc_valid = false; 9450 link->u.mgd.dtim_period = 0; 9451 link->u.mgd.have_beacon = false; 9452 9453 /* override HT configuration only if the AP and we support it */ 9454 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9455 struct ieee80211_sta_ht_cap sta_ht_cap; 9456 9457 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9458 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9459 } 9460 9461 rcu_read_lock(); 9462 bss_ies = rcu_dereference(cbss->beacon_ies); 9463 if (bss_ies) { 9464 u8 dtim_count = 0; 9465 9466 ieee80211_get_dtim(bss_ies, &dtim_count, 9467 &link->u.mgd.dtim_period); 9468 9469 sdata->deflink.u.mgd.have_beacon = true; 9470 9471 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9472 link->conf->sync_tsf = bss_ies->tsf; 9473 link->conf->sync_device_ts = bss->device_ts_beacon; 9474 link->conf->sync_dtim_count = dtim_count; 9475 } 9476 } else { 9477 bss_ies = rcu_dereference(cbss->ies); 9478 } 9479 9480 if (bss_ies) { 9481 const struct element *elem; 9482 9483 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9484 bss_ies->data, bss_ies->len); 9485 if (elem && elem->datalen >= 3) 9486 link->conf->profile_periodicity = elem->data[2]; 9487 else 9488 link->conf->profile_periodicity = 0; 9489 9490 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9491 bss_ies->data, bss_ies->len); 9492 if (elem && elem->datalen >= 11 && 9493 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9494 link->conf->ema_ap = true; 9495 else 9496 link->conf->ema_ap = false; 9497 } 9498 rcu_read_unlock(); 9499 9500 if (bss->corrupt_data) { 9501 char *corrupt_type = "data"; 9502 9503 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9504 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9505 corrupt_type = "beacon and probe response"; 9506 else 9507 corrupt_type = "beacon"; 9508 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9509 corrupt_type = "probe response"; 9510 } 9511 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9512 cbss->bssid, corrupt_type); 9513 } 9514 9515 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9516 if (sdata->u.mgd.powersave) 9517 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9518 else 9519 link->smps_mode = IEEE80211_SMPS_OFF; 9520 } else { 9521 link->smps_mode = link->u.mgd.req_smps; 9522 } 9523} 9524 9525static int 9526ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9527 struct ieee80211_mgd_assoc_data *assoc_data, 9528 int link_id) 9529{ 9530 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9531 enum nl80211_band band = cbss->channel->band; 9532 struct ieee80211_supported_band *sband; 9533 const struct element *elem; 9534 int err; 9535 9536 /* neither HT nor VHT elements used on 6 GHz */ 9537 if (band == NL80211_BAND_6GHZ) 9538 return 0; 9539 9540 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9541 return 0; 9542 9543 rcu_read_lock(); 9544 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9545 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9546 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9547 cbss->bssid); 9548 err = -EINVAL; 9549 goto out_rcu; 9550 } 9551 assoc_data->link[link_id].ap_ht_param = 9552 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9553 rcu_read_unlock(); 9554 9555 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9556 return 0; 9557 9558 /* some drivers want to support VHT on 2.4 GHz even */ 9559 sband = sdata->local->hw.wiphy->bands[band]; 9560 if (!sband->vht_cap.vht_supported) 9561 return 0; 9562 9563 rcu_read_lock(); 9564 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9565 /* but even then accept it not being present on the AP */ 9566 if (!elem && band == NL80211_BAND_2GHZ) { 9567 err = 0; 9568 goto out_rcu; 9569 } 9570 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9571 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9572 cbss->bssid); 9573 err = -EINVAL; 9574 goto out_rcu; 9575 } 9576 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9577 sizeof(struct ieee80211_vht_cap)); 9578 rcu_read_unlock(); 9579 9580 return 0; 9581out_rcu: 9582 rcu_read_unlock(); 9583 return err; 9584} 9585 9586static bool 9587ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9588{ 9589 const struct cfg80211_bss_ies *ies; 9590 struct cfg80211_bss *bss; 9591 const struct element *ml; 9592 9593 /* not an MLO connection if link_id < 0, so irrelevant */ 9594 if (req->link_id < 0) 9595 return false; 9596 9597 bss = req->links[req->link_id].bss; 9598 9599 guard(rcu)(); 9600 ies = rcu_dereference(bss->ies); 9601 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9602 ies->data, ies->len) { 9603 const struct ieee80211_multi_link_elem *mle; 9604 9605 if (!ieee80211_mle_type_ok(ml->data + 1, 9606 IEEE80211_ML_CONTROL_TYPE_BASIC, 9607 ml->datalen - 1)) 9608 continue; 9609 9610 mle = (void *)(ml->data + 1); 9611 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9612 return true; 9613 } 9614 9615 return false; 9616 9617} 9618 9619int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9620 struct cfg80211_assoc_request *req) 9621{ 9622 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9623 struct ieee80211_local *local = sdata->local; 9624 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9625 struct ieee80211_mgd_assoc_data *assoc_data; 9626 const struct element *ssid_elem; 9627 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9628 struct ieee80211_link_data *link; 9629 struct cfg80211_bss *cbss; 9630 bool override, uapsd_supported; 9631 bool match_auth; 9632 int i, err; 9633 size_t size = sizeof(*assoc_data) + req->ie_len; 9634 9635 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9636 size += req->links[i].elems_len; 9637 9638 /* FIXME: no support for 4-addr MLO yet */ 9639 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9640 return -EOPNOTSUPP; 9641 9642 assoc_data = kzalloc(size, GFP_KERNEL); 9643 if (!assoc_data) 9644 return -ENOMEM; 9645 9646 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9647 9648 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9649 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9650 err = -EINVAL; 9651 goto err_free; 9652 } 9653 9654 rcu_read_lock(); 9655 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9656 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9657 rcu_read_unlock(); 9658 err = -EINVAL; 9659 goto err_free; 9660 } 9661 9662 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9663 assoc_data->ssid_len = ssid_elem->datalen; 9664 rcu_read_unlock(); 9665 9666 if (req->ap_mld_addr) 9667 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9668 else 9669 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9670 9671 /* 9672 * Many APs have broken parsing of the extended MLD capa/ops field, 9673 * dropping (re-)association request frames or replying with association 9674 * response with a failure status if it's present. 9675 * Set our value from the userspace request only in strict mode or if 9676 * the AP also had that field present. 9677 */ 9678 if (ieee80211_hw_check(&local->hw, STRICT) || 9679 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9680 assoc_data->ext_mld_capa_ops = 9681 cpu_to_le16(req->ext_mld_capa_ops); 9682 9683 if (ifmgd->associated) { 9684 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9685 9686 sdata_info(sdata, 9687 "disconnect from AP %pM for new assoc to %pM\n", 9688 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9689 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9690 WLAN_REASON_UNSPECIFIED, 9691 false, frame_buf); 9692 9693 ieee80211_report_disconnect(sdata, frame_buf, 9694 sizeof(frame_buf), true, 9695 WLAN_REASON_UNSPECIFIED, 9696 false); 9697 } 9698 9699 memset(sdata->u.mgd.userspace_selectors, 0, 9700 sizeof(sdata->u.mgd.userspace_selectors)); 9701 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9702 req->supported_selectors, 9703 req->supported_selectors_len); 9704 9705 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9706 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9707 sizeof(ifmgd->ht_capa_mask)); 9708 9709 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9710 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9711 sizeof(ifmgd->vht_capa_mask)); 9712 9713 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9714 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9715 sizeof(ifmgd->s1g_capa_mask)); 9716 9717 /* keep some setup (AP STA, channel, ...) if matching */ 9718 match_auth = ifmgd->auth_data && 9719 ether_addr_equal(ifmgd->auth_data->ap_addr, 9720 assoc_data->ap_addr) && 9721 ifmgd->auth_data->link_id == req->link_id; 9722 9723 if (req->ap_mld_addr) { 9724 uapsd_supported = true; 9725 9726 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9727 ASSOC_REQ_DISABLE_VHT | 9728 ASSOC_REQ_DISABLE_HE | 9729 ASSOC_REQ_DISABLE_EHT)) { 9730 err = -EINVAL; 9731 goto err_free; 9732 } 9733 9734 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9735 struct ieee80211_supported_band *sband; 9736 struct cfg80211_bss *link_cbss = req->links[i].bss; 9737 struct ieee80211_bss *bss; 9738 9739 if (!link_cbss) 9740 continue; 9741 9742 bss = (void *)link_cbss->priv; 9743 9744 if (!bss->wmm_used) { 9745 err = -EINVAL; 9746 req->links[i].error = err; 9747 goto err_free; 9748 } 9749 9750 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9751 err = -EINVAL; 9752 req->links[i].error = err; 9753 goto err_free; 9754 } 9755 9756 link = sdata_dereference(sdata->link[i], sdata); 9757 if (link) 9758 ether_addr_copy(assoc_data->link[i].addr, 9759 link->conf->addr); 9760 else 9761 eth_random_addr(assoc_data->link[i].addr); 9762 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9763 9764 if (match_auth && i == assoc_link_id && link) 9765 assoc_data->link[i].conn = link->u.mgd.conn; 9766 else 9767 assoc_data->link[i].conn = 9768 ieee80211_conn_settings_unlimited; 9769 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9770 req, true, i, 9771 &assoc_data->link[i].conn); 9772 assoc_data->link[i].bss = link_cbss; 9773 9774 if (!bss->uapsd_supported) 9775 uapsd_supported = false; 9776 9777 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9778 err = -EINVAL; 9779 req->links[i].error = err; 9780 goto err_free; 9781 } 9782 9783 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9784 assoc_data, i); 9785 if (err) { 9786 err = -EINVAL; 9787 req->links[i].error = err; 9788 goto err_free; 9789 } 9790 } 9791 9792 assoc_data->wmm = true; 9793 } else { 9794 struct ieee80211_supported_band *sband; 9795 struct ieee80211_bss *bss = (void *)cbss->priv; 9796 9797 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9798 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9799 9800 assoc_data->wmm = bss->wmm_used && 9801 (local->hw.queues >= IEEE80211_NUM_ACS); 9802 9803 if (cbss->channel->band == NL80211_BAND_6GHZ && 9804 req->flags & (ASSOC_REQ_DISABLE_HT | 9805 ASSOC_REQ_DISABLE_VHT | 9806 ASSOC_REQ_DISABLE_HE)) { 9807 err = -EINVAL; 9808 goto err_free; 9809 } 9810 9811 sband = local->hw.wiphy->bands[cbss->channel->band]; 9812 9813 assoc_data->link[0].bss = cbss; 9814 9815 if (match_auth) 9816 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9817 else 9818 assoc_data->link[0].conn = 9819 ieee80211_conn_settings_unlimited; 9820 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9821 assoc_data->wmm, 0, 9822 &assoc_data->link[0].conn); 9823 9824 uapsd_supported = bss->uapsd_supported; 9825 9826 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9827 if (err) 9828 goto err_free; 9829 } 9830 9831 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9832 9833 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9834 err = -EBUSY; 9835 goto err_free; 9836 } 9837 9838 if (ifmgd->assoc_data) { 9839 err = -EBUSY; 9840 goto err_free; 9841 } 9842 9843 /* Cleanup is delayed if auth_data matches */ 9844 if (ifmgd->auth_data && !match_auth) 9845 ieee80211_destroy_auth_data(sdata, false); 9846 9847 if (req->ie && req->ie_len) { 9848 memcpy(assoc_data->ie, req->ie, req->ie_len); 9849 assoc_data->ie_len = req->ie_len; 9850 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9851 } else { 9852 assoc_data->ie_pos = assoc_data->ie; 9853 } 9854 9855 if (req->fils_kek) { 9856 /* should already be checked in cfg80211 - so warn */ 9857 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9858 err = -EINVAL; 9859 goto err_free; 9860 } 9861 memcpy(assoc_data->fils_kek, req->fils_kek, 9862 req->fils_kek_len); 9863 assoc_data->fils_kek_len = req->fils_kek_len; 9864 } 9865 9866 if (req->fils_nonces) 9867 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9868 2 * FILS_NONCE_LEN); 9869 9870 /* default timeout */ 9871 assoc_data->timeout = jiffies; 9872 assoc_data->timeout_started = true; 9873 9874 assoc_data->assoc_link_id = assoc_link_id; 9875 9876 if (req->ap_mld_addr) { 9877 /* if there was no authentication, set up the link */ 9878 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9879 if (err) 9880 goto err_clear; 9881 } 9882 9883 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9884 if (WARN_ON(!link)) { 9885 err = -EINVAL; 9886 goto err_clear; 9887 } 9888 9889 override = link->u.mgd.conn.mode != 9890 assoc_data->link[assoc_link_id].conn.mode || 9891 link->u.mgd.conn.bw_limit != 9892 assoc_data->link[assoc_link_id].conn.bw_limit; 9893 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9894 9895 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9896 assoc_link_id); 9897 9898 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9899 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9900 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9901 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9902 9903 if (assoc_data->wmm && uapsd_supported && 9904 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9905 assoc_data->uapsd = true; 9906 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9907 } else { 9908 assoc_data->uapsd = false; 9909 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9910 } 9911 9912 if (req->prev_bssid) 9913 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9914 9915 if (req->use_mfp) { 9916 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9917 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9918 } else { 9919 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9920 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9921 } 9922 9923 if (req->flags & ASSOC_REQ_USE_RRM) 9924 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9925 else 9926 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9927 9928 if (req->crypto.control_port) 9929 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9930 else 9931 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9932 9933 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9934 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9935 sdata->control_port_over_nl80211 = 9936 req->crypto.control_port_over_nl80211; 9937 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9938 9939 /* kick off associate process */ 9940 ifmgd->assoc_data = assoc_data; 9941 9942 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9943 if (!assoc_data->link[i].bss) 9944 continue; 9945 if (i == assoc_data->assoc_link_id) 9946 continue; 9947 /* only calculate the mode, hence link == NULL */ 9948 err = ieee80211_prep_channel(sdata, NULL, i, 9949 assoc_data->link[i].bss, true, 9950 &assoc_data->link[i].conn, 9951 sdata->u.mgd.userspace_selectors); 9952 if (err) { 9953 req->links[i].error = err; 9954 goto err_clear; 9955 } 9956 } 9957 9958 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9959 vif_cfg->ssid_len = assoc_data->ssid_len; 9960 9961 /* needed for transmitting the assoc frames properly */ 9962 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9963 9964 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9965 req->ap_mld_addr, true, 9966 &assoc_data->link[assoc_link_id].conn, 9967 override, 9968 sdata->u.mgd.userspace_selectors); 9969 if (err) 9970 goto err_clear; 9971 9972 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9973 const struct cfg80211_bss_ies *beacon_ies; 9974 9975 rcu_read_lock(); 9976 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9977 if (!beacon_ies) { 9978 /* 9979 * Wait up to one beacon interval ... 9980 * should this be more if we miss one? 9981 */ 9982 sdata_info(sdata, "waiting for beacon from %pM\n", 9983 link->u.mgd.bssid); 9984 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9985 assoc_data->timeout_started = true; 9986 assoc_data->need_beacon = true; 9987 } 9988 rcu_read_unlock(); 9989 } 9990 9991 run_again(sdata, assoc_data->timeout); 9992 9993 /* We are associating, clean up auth_data */ 9994 if (ifmgd->auth_data) 9995 ieee80211_destroy_auth_data(sdata, true); 9996 9997 return 0; 9998 err_clear: 9999 if (!ifmgd->auth_data) { 10000 eth_zero_addr(sdata->deflink.u.mgd.bssid); 10001 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 10002 BSS_CHANGED_BSSID); 10003 } 10004 ifmgd->assoc_data = NULL; 10005 err_free: 10006 kfree(assoc_data); 10007 return err; 10008} 10009 10010int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 10011 struct cfg80211_deauth_request *req) 10012{ 10013 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10014 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10015 bool tx = !req->local_state_change; 10016 struct ieee80211_prep_tx_info info = { 10017 .subtype = IEEE80211_STYPE_DEAUTH, 10018 }; 10019 10020 if (ifmgd->auth_data && 10021 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 10022 sdata_info(sdata, 10023 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 10024 req->bssid, req->reason_code, 10025 ieee80211_get_reason_code_string(req->reason_code)); 10026 10027 info.link_id = ifmgd->auth_data->link_id; 10028 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10029 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10030 IEEE80211_STYPE_DEAUTH, 10031 req->reason_code, tx, 10032 frame_buf); 10033 ieee80211_destroy_auth_data(sdata, false); 10034 ieee80211_report_disconnect(sdata, frame_buf, 10035 sizeof(frame_buf), true, 10036 req->reason_code, false); 10037 drv_mgd_complete_tx(sdata->local, sdata, &info); 10038 return 0; 10039 } 10040 10041 if (ifmgd->assoc_data && 10042 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10043 sdata_info(sdata, 10044 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10045 req->bssid, req->reason_code, 10046 ieee80211_get_reason_code_string(req->reason_code)); 10047 10048 info.link_id = ifmgd->assoc_data->assoc_link_id; 10049 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10050 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10051 IEEE80211_STYPE_DEAUTH, 10052 req->reason_code, tx, 10053 frame_buf); 10054 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10055 ieee80211_report_disconnect(sdata, frame_buf, 10056 sizeof(frame_buf), true, 10057 req->reason_code, false); 10058 drv_mgd_complete_tx(sdata->local, sdata, &info); 10059 return 0; 10060 } 10061 10062 if (ifmgd->associated && 10063 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10064 sdata_info(sdata, 10065 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10066 req->bssid, req->reason_code, 10067 ieee80211_get_reason_code_string(req->reason_code)); 10068 10069 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10070 req->reason_code, tx, frame_buf); 10071 ieee80211_report_disconnect(sdata, frame_buf, 10072 sizeof(frame_buf), true, 10073 req->reason_code, false); 10074 return 0; 10075 } 10076 10077 return -ENOTCONN; 10078} 10079 10080int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10081 struct cfg80211_disassoc_request *req) 10082{ 10083 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10084 10085 if (!sdata->u.mgd.associated || 10086 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10087 return -ENOTCONN; 10088 10089 sdata_info(sdata, 10090 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10091 req->ap_addr, req->reason_code, 10092 ieee80211_get_reason_code_string(req->reason_code)); 10093 10094 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10095 req->reason_code, !req->local_state_change, 10096 frame_buf); 10097 10098 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10099 req->reason_code, false); 10100 10101 return 0; 10102} 10103 10104void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10105{ 10106 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10107 &link->u.mgd.request_smps_work); 10108 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10109 &link->u.mgd.recalc_smps); 10110 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10111 &link->u.mgd.csa.switch_work); 10112} 10113 10114void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10115{ 10116 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10117 10118 /* 10119 * Make sure some work items will not run after this, 10120 * they will not do anything but might not have been 10121 * cancelled when disconnecting. 10122 */ 10123 wiphy_work_cancel(sdata->local->hw.wiphy, 10124 &ifmgd->monitor_work); 10125 wiphy_work_cancel(sdata->local->hw.wiphy, 10126 &ifmgd->beacon_connection_loss_work); 10127 wiphy_work_cancel(sdata->local->hw.wiphy, 10128 &ifmgd->csa_connection_drop_work); 10129 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10130 &ifmgd->tdls_peer_del_work); 10131 10132 if (ifmgd->assoc_data) 10133 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10134 if (ifmgd->auth_data) 10135 ieee80211_destroy_auth_data(sdata, false); 10136 spin_lock_bh(&ifmgd->teardown_lock); 10137 if (ifmgd->teardown_skb) { 10138 kfree_skb(ifmgd->teardown_skb); 10139 ifmgd->teardown_skb = NULL; 10140 ifmgd->orig_teardown_skb = NULL; 10141 } 10142 kfree(ifmgd->assoc_req_ies); 10143 ifmgd->assoc_req_ies = NULL; 10144 ifmgd->assoc_req_ies_len = 0; 10145 spin_unlock_bh(&ifmgd->teardown_lock); 10146 timer_delete_sync(&ifmgd->timer); 10147} 10148 10149void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10150 enum nl80211_cqm_rssi_threshold_event rssi_event, 10151 s32 rssi_level, 10152 gfp_t gfp) 10153{ 10154 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10155 10156 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10157 10158 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10159} 10160EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10161 10162void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10163{ 10164 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10165 10166 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10167 10168 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10169} 10170EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10171 10172static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10173 int rssi_min_thold, 10174 int rssi_max_thold) 10175{ 10176 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10177 10178 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10179 return; 10180 10181 /* 10182 * Scale up threshold values before storing it, as the RSSI averaging 10183 * algorithm uses a scaled up value as well. Change this scaling 10184 * factor if the RSSI averaging algorithm changes. 10185 */ 10186 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10187 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10188} 10189 10190void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10191 int rssi_min_thold, 10192 int rssi_max_thold) 10193{ 10194 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10195 10196 WARN_ON(rssi_min_thold == rssi_max_thold || 10197 rssi_min_thold > rssi_max_thold); 10198 10199 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10200 rssi_max_thold); 10201} 10202EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10203 10204void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10205{ 10206 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10207 10208 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10209} 10210EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10211 10212void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10213 struct ieee80211_mgmt *mgmt, size_t len) 10214{ 10215 struct ieee80211_local *local = sdata->local; 10216 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10217 struct ieee80211_mgd_assoc_data *add_links_data = 10218 ifmgd->reconf.add_links_data; 10219 struct sta_info *sta; 10220 struct cfg80211_mlo_reconf_done_data done_data = {}; 10221 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10222 sdata->u.mgd.reconf.removed_links; 10223 u16 link_mask, valid_links; 10224 unsigned int link_id; 10225 size_t orig_len = len; 10226 u8 i, group_key_data_len; 10227 u8 *pos; 10228 10229 if (!ieee80211_vif_is_mld(&sdata->vif) || 10230 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10231 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10232 sdata->u.mgd.reconf.dialog_token || 10233 !sta_changed_links) 10234 return; 10235 10236 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10237 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10238 10239 /* each status duple is 3 octets */ 10240 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10241 sdata_info(sdata, 10242 "mlo: reconf: unexpected len=%zu, count=%u\n", 10243 len, mgmt->u.action.u.ml_reconf_resp.count); 10244 goto disconnect; 10245 } 10246 10247 link_mask = sta_changed_links; 10248 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10249 u16 status = get_unaligned_le16(pos + 1); 10250 10251 link_id = *pos; 10252 10253 if (!(link_mask & BIT(link_id))) { 10254 sdata_info(sdata, 10255 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10256 link_id, sta_changed_links); 10257 goto disconnect; 10258 } 10259 10260 /* clear the corresponding link, to detect the case that 10261 * the same link was included more than one time 10262 */ 10263 link_mask &= ~BIT(link_id); 10264 10265 /* Handle failure to remove links here. Failure to remove added 10266 * links will be done later in the flow. 10267 */ 10268 if (status != WLAN_STATUS_SUCCESS) { 10269 sdata_info(sdata, 10270 "mlo: reconf: failed on link=%u, status=%u\n", 10271 link_id, status); 10272 10273 /* The AP MLD failed to remove a link that was already 10274 * removed locally. As this is not expected behavior, 10275 * disconnect 10276 */ 10277 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10278 goto disconnect; 10279 10280 /* The AP MLD failed to add a link. Remove it from the 10281 * added links. 10282 */ 10283 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10284 } 10285 10286 pos += 3; 10287 len -= 3; 10288 } 10289 10290 if (link_mask) { 10291 sdata_info(sdata, 10292 "mlo: reconf: no response for links=0x%x\n", 10293 link_mask); 10294 goto disconnect; 10295 } 10296 10297 if (!sdata->u.mgd.reconf.added_links) 10298 goto out; 10299 10300 if (len < 1 || len < 1 + *pos) { 10301 sdata_info(sdata, 10302 "mlo: reconf: invalid group key data length"); 10303 goto disconnect; 10304 } 10305 10306 /* The Group Key Data field must be present when links are added. This 10307 * field should be processed by userland. 10308 */ 10309 group_key_data_len = *pos++; 10310 10311 pos += group_key_data_len; 10312 len -= group_key_data_len + 1; 10313 10314 /* Process the information for the added links */ 10315 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10316 if (WARN_ON(!sta)) 10317 goto disconnect; 10318 10319 valid_links = sdata->vif.valid_links; 10320 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10321 if (!add_links_data->link[link_id].bss || 10322 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10323 continue; 10324 10325 valid_links |= BIT(link_id); 10326 if (ieee80211_sta_allocate_link(sta, link_id)) 10327 goto disconnect; 10328 } 10329 10330 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10331 link_mask = 0; 10332 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10333 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10334 struct ieee80211_link_data *link; 10335 struct link_sta_info *link_sta; 10336 u64 changed = 0; 10337 10338 if (!cbss) 10339 continue; 10340 10341 link = sdata_dereference(sdata->link[link_id], sdata); 10342 if (WARN_ON(!link)) 10343 goto disconnect; 10344 10345 link_info(link, 10346 "mlo: reconf: local address %pM, AP link address %pM\n", 10347 add_links_data->link[link_id].addr, 10348 add_links_data->link[link_id].bss->bssid); 10349 10350 link_sta = rcu_dereference_protected(sta->link[link_id], 10351 lockdep_is_held(&local->hw.wiphy->mtx)); 10352 if (WARN_ON(!link_sta)) 10353 goto disconnect; 10354 10355 if (!link->u.mgd.have_beacon) { 10356 const struct cfg80211_bss_ies *ies; 10357 10358 rcu_read_lock(); 10359 ies = rcu_dereference(cbss->beacon_ies); 10360 if (ies) 10361 link->u.mgd.have_beacon = true; 10362 else 10363 ies = rcu_dereference(cbss->ies); 10364 ieee80211_get_dtim(ies, 10365 &link->conf->sync_dtim_count, 10366 &link->u.mgd.dtim_period); 10367 link->conf->beacon_int = cbss->beacon_interval; 10368 rcu_read_unlock(); 10369 } 10370 10371 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10372 10373 link->u.mgd.conn = add_links_data->link[link_id].conn; 10374 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10375 true, &link->u.mgd.conn, 10376 sdata->u.mgd.userspace_selectors)) { 10377 link_info(link, "mlo: reconf: prep_channel failed\n"); 10378 goto disconnect; 10379 } 10380 10381 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10382 add_links_data->link[link_id].bss)) 10383 goto disconnect; 10384 10385 if (!ieee80211_assoc_config_link(link, link_sta, 10386 add_links_data->link[link_id].bss, 10387 mgmt, pos, len, 10388 &changed)) 10389 goto disconnect; 10390 10391 /* The AP MLD indicated success for this link, but the station 10392 * profile status indicated otherwise. Since there is an 10393 * inconsistency in the ML reconfiguration response, disconnect 10394 */ 10395 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10396 goto disconnect; 10397 10398 ieee80211_sta_init_nss(link_sta); 10399 if (ieee80211_sta_activate_link(sta, link_id)) 10400 goto disconnect; 10401 10402 changed |= ieee80211_link_set_associated(link, cbss); 10403 ieee80211_link_info_change_notify(sdata, link, changed); 10404 10405 ieee80211_recalc_smps(sdata, link); 10406 link_mask |= BIT(link_id); 10407 } 10408 10409 sdata_info(sdata, 10410 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10411 valid_links, link_mask); 10412 10413 /* links might have changed due to rejected ones, set them again */ 10414 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10415 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10416 10417 ieee80211_recalc_ps(local); 10418 ieee80211_recalc_ps_vif(sdata); 10419 10420 done_data.buf = (const u8 *)mgmt; 10421 done_data.len = orig_len; 10422 done_data.added_links = link_mask; 10423 10424 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10425 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10426 done_data.links[link_id].addr = 10427 add_links_data->link[link_id].addr; 10428 } 10429 10430 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10431 kfree(sdata->u.mgd.reconf.add_links_data); 10432 sdata->u.mgd.reconf.add_links_data = NULL; 10433out: 10434 ieee80211_ml_reconf_reset(sdata); 10435 return; 10436 10437disconnect: 10438 __ieee80211_disconnect(sdata); 10439} 10440 10441static struct sk_buff * 10442ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10443 struct ieee80211_mgd_assoc_data *add_links_data, 10444 u16 removed_links, __le16 ext_mld_capa_ops) 10445{ 10446 struct ieee80211_local *local = sdata->local; 10447 struct ieee80211_mgmt *mgmt; 10448 struct ieee80211_multi_link_elem *ml_elem; 10449 struct ieee80211_mle_basic_common_info *common; 10450 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10451 struct sk_buff *skb; 10452 size_t size; 10453 unsigned int link_id; 10454 __le16 eml_capa = 0, mld_capa_ops = 0; 10455 struct ieee80211_tx_info *info; 10456 u8 common_size, var_common_size; 10457 u8 *ml_elem_len; 10458 u16 capab = 0; 10459 10460 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10461 10462 /* Consider the maximal length of the reconfiguration ML element */ 10463 size += sizeof(struct ieee80211_multi_link_elem); 10464 10465 /* The Basic ML element and the Reconfiguration ML element have the same 10466 * fixed common information fields in the context of ML reconfiguration 10467 * action frame. The AP MLD MAC address must always be present 10468 */ 10469 common_size = sizeof(*common); 10470 10471 /* when adding links, the MLD capabilities must be present */ 10472 var_common_size = 0; 10473 if (add_links_data) { 10474 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10475 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10476 ieee80211_vif_type_p2p(&sdata->vif)); 10477 10478 if (ift_ext_capa) { 10479 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10480 mld_capa_ops = 10481 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10482 } 10483 10484 /* MLD capabilities and operation */ 10485 var_common_size += 2; 10486 10487 /* EML capabilities */ 10488 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10489 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10490 var_common_size += 2; 10491 } 10492 10493 if (ext_mld_capa_ops) 10494 var_common_size += 2; 10495 10496 /* Add the common information length */ 10497 size += common_size + var_common_size; 10498 10499 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10500 struct cfg80211_bss *cbss; 10501 size_t elems_len; 10502 10503 if (removed_links & BIT(link_id)) { 10504 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10505 ETH_ALEN; 10506 continue; 10507 } 10508 10509 if (!add_links_data || !add_links_data->link[link_id].bss) 10510 continue; 10511 10512 elems_len = add_links_data->link[link_id].elems_len; 10513 cbss = add_links_data->link[link_id].bss; 10514 10515 /* should be the same across all BSSes */ 10516 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10517 capab |= WLAN_CAPABILITY_PRIVACY; 10518 10519 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10520 ETH_ALEN; 10521 10522 /* WMM */ 10523 size += 9; 10524 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10525 elems_len); 10526 } 10527 10528 skb = alloc_skb(size, GFP_KERNEL); 10529 if (!skb) 10530 return NULL; 10531 10532 skb_reserve(skb, local->hw.extra_tx_headroom); 10533 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10534 u.action.u.ml_reconf_req)); 10535 10536 /* Add the MAC header */ 10537 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10538 IEEE80211_STYPE_ACTION); 10539 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10540 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10541 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10542 10543 /* Add the action frame fixed fields */ 10544 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10545 mgmt->u.action.u.ml_reconf_req.action_code = 10546 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10547 10548 /* allocate a dialog token and store it */ 10549 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10550 mgmt->u.action.u.ml_reconf_req.dialog_token = 10551 sdata->u.mgd.reconf.dialog_token; 10552 10553 /* Add the ML reconfiguration element and the common information */ 10554 skb_put_u8(skb, WLAN_EID_EXTENSION); 10555 ml_elem_len = skb_put(skb, 1); 10556 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10557 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10558 ml_elem->control = 10559 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10560 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10561 common = skb_put(skb, common_size); 10562 common->len = common_size + var_common_size; 10563 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10564 10565 if (add_links_data) { 10566 if (eml_capa & 10567 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10568 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10569 ml_elem->control |= 10570 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10571 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10572 } 10573 10574 ml_elem->control |= 10575 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10576 10577 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10578 } 10579 10580 if (ext_mld_capa_ops) { 10581 ml_elem->control |= 10582 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10583 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10584 } 10585 10586 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10587 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10588 10589 /* Add the per station profile */ 10590 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10591 u8 *subelem_len = NULL; 10592 u16 ctrl; 10593 const u8 *addr; 10594 10595 /* Skip links that are not changing */ 10596 if (!(removed_links & BIT(link_id)) && 10597 (!add_links_data || !add_links_data->link[link_id].bss)) 10598 continue; 10599 10600 ctrl = link_id | 10601 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10602 10603 if (removed_links & BIT(link_id)) { 10604 struct ieee80211_bss_conf *conf = 10605 sdata_dereference(sdata->vif.link_conf[link_id], 10606 sdata); 10607 if (!conf) 10608 continue; 10609 10610 addr = conf->addr; 10611 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10612 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10613 } else { 10614 addr = add_links_data->link[link_id].addr; 10615 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10616 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10617 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10618 } 10619 10620 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10621 subelem_len = skb_put(skb, 1); 10622 10623 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10624 skb_put_u8(skb, 1 + ETH_ALEN); 10625 skb_put_data(skb, addr, ETH_ALEN); 10626 10627 if (!(removed_links & BIT(link_id))) { 10628 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10629 size_t extra_used; 10630 void *capab_pos; 10631 u8 qos_info; 10632 10633 capab_pos = skb_put(skb, 2); 10634 10635 extra_used = 10636 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10637 add_links_data->link[link_id].elems, 10638 add_links_data->link[link_id].elems_len, 10639 link_id, NULL, 10640 link_present_elems, 10641 add_links_data); 10642 10643 if (add_links_data->link[link_id].elems) 10644 skb_put_data(skb, 10645 add_links_data->link[link_id].elems + 10646 extra_used, 10647 add_links_data->link[link_id].elems_len - 10648 extra_used); 10649 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10650 qos_info = sdata->u.mgd.uapsd_queues; 10651 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10652 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10653 } else { 10654 qos_info = 0; 10655 } 10656 10657 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10658 put_unaligned_le16(capab, capab_pos); 10659 } 10660 10661 ieee80211_fragment_element(skb, subelem_len, 10662 IEEE80211_MLE_SUBELEM_FRAGMENT); 10663 } 10664 10665 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10666 10667 info = IEEE80211_SKB_CB(skb); 10668 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10669 10670 return skb; 10671} 10672 10673int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10674 struct cfg80211_ml_reconf_req *req) 10675{ 10676 struct ieee80211_local *local = sdata->local; 10677 struct ieee80211_mgd_assoc_data *data = NULL; 10678 struct sta_info *sta; 10679 struct sk_buff *skb; 10680 u16 added_links, new_valid_links; 10681 int link_id, err; 10682 10683 if (!ieee80211_vif_is_mld(&sdata->vif) || 10684 !(sdata->vif.cfg.mld_capa_op & 10685 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10686 return -EINVAL; 10687 10688 /* No support for concurrent ML reconfiguration operation */ 10689 if (sdata->u.mgd.reconf.added_links || 10690 sdata->u.mgd.reconf.removed_links) 10691 return -EBUSY; 10692 10693 added_links = 0; 10694 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10695 if (!req->add_links[link_id].bss) 10696 continue; 10697 10698 added_links |= BIT(link_id); 10699 } 10700 10701 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10702 if (WARN_ON(!sta)) 10703 return -ENOLINK; 10704 10705 /* Adding links to the set of valid link is done only after a successful 10706 * ML reconfiguration frame exchange. Here prepare the data for the ML 10707 * reconfiguration frame construction and allocate the required 10708 * resources 10709 */ 10710 if (added_links) { 10711 bool uapsd_supported; 10712 10713 data = kzalloc(sizeof(*data), GFP_KERNEL); 10714 if (!data) 10715 return -ENOMEM; 10716 10717 data->assoc_link_id = -1; 10718 data->wmm = true; 10719 10720 uapsd_supported = true; 10721 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10722 link_id++) { 10723 struct ieee80211_supported_band *sband; 10724 struct cfg80211_bss *link_cbss = 10725 req->add_links[link_id].bss; 10726 struct ieee80211_bss *bss; 10727 10728 if (!link_cbss) 10729 continue; 10730 10731 bss = (void *)link_cbss->priv; 10732 10733 if (!bss->wmm_used) { 10734 err = -EINVAL; 10735 goto err_free; 10736 } 10737 10738 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10739 err = -EINVAL; 10740 goto err_free; 10741 } 10742 10743 eth_random_addr(data->link[link_id].addr); 10744 data->link[link_id].conn = 10745 ieee80211_conn_settings_unlimited; 10746 sband = 10747 local->hw.wiphy->bands[link_cbss->channel->band]; 10748 10749 ieee80211_determine_our_sta_mode(sdata, sband, 10750 NULL, true, link_id, 10751 &data->link[link_id].conn); 10752 10753 data->link[link_id].bss = link_cbss; 10754 data->link[link_id].elems = 10755 (u8 *)req->add_links[link_id].elems; 10756 data->link[link_id].elems_len = 10757 req->add_links[link_id].elems_len; 10758 10759 if (!bss->uapsd_supported) 10760 uapsd_supported = false; 10761 10762 if (data->link[link_id].conn.mode < 10763 IEEE80211_CONN_MODE_EHT) { 10764 err = -EINVAL; 10765 goto err_free; 10766 } 10767 10768 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10769 link_id); 10770 if (err) { 10771 err = -EINVAL; 10772 goto err_free; 10773 } 10774 } 10775 10776 /* Require U-APSD support if we enabled it */ 10777 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10778 !uapsd_supported) { 10779 err = -EINVAL; 10780 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10781 goto err_free; 10782 } 10783 10784 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10785 link_id++) { 10786 if (!data->link[link_id].bss) 10787 continue; 10788 10789 /* only used to verify the mode, nothing is allocated */ 10790 err = ieee80211_prep_channel(sdata, NULL, link_id, 10791 data->link[link_id].bss, 10792 true, 10793 &data->link[link_id].conn, 10794 sdata->u.mgd.userspace_selectors); 10795 if (err) 10796 goto err_free; 10797 } 10798 } 10799 10800 /* link removal is done before the ML reconfiguration frame exchange so 10801 * that these links will not be used between their removal by the AP MLD 10802 * and before the station got the ML reconfiguration response. Based on 10803 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10804 * link removal request. 10805 */ 10806 if (req->rem_links) { 10807 u16 new_active_links = 10808 sdata->vif.active_links & ~req->rem_links; 10809 10810 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10811 10812 /* Should not be left with no valid links to perform the 10813 * ML reconfiguration 10814 */ 10815 if (!new_valid_links || 10816 !(new_valid_links & ~sdata->vif.dormant_links)) { 10817 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10818 err = -EINVAL; 10819 goto err_free; 10820 } 10821 10822 if (new_active_links != sdata->vif.active_links) { 10823 if (!new_active_links) 10824 new_active_links = 10825 BIT(__ffs(new_valid_links & 10826 ~sdata->vif.dormant_links)); 10827 10828 err = ieee80211_set_active_links(&sdata->vif, 10829 new_active_links); 10830 if (err) { 10831 sdata_info(sdata, 10832 "mlo: reconf: failed set active links\n"); 10833 goto err_free; 10834 } 10835 } 10836 } 10837 10838 /* Build the SKB before the link removal as the construction of the 10839 * station info for removed links requires the local address. 10840 * Invalidate the removed links, so that the transmission of the ML 10841 * reconfiguration request frame would not be done using them, as the AP 10842 * is expected to send the ML reconfiguration response frame on the link 10843 * on which the request was received. 10844 */ 10845 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10846 cpu_to_le16(req->ext_mld_capa_ops)); 10847 if (!skb) { 10848 err = -ENOMEM; 10849 goto err_free; 10850 } 10851 10852 if (req->rem_links) { 10853 u16 new_dormant_links = 10854 sdata->vif.dormant_links & ~req->rem_links; 10855 10856 err = ieee80211_vif_set_links(sdata, new_valid_links, 10857 new_dormant_links); 10858 if (err) { 10859 sdata_info(sdata, 10860 "mlo: reconf: failed set valid links\n"); 10861 kfree_skb(skb); 10862 goto err_free; 10863 } 10864 10865 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10866 link_id++) { 10867 if (!(req->rem_links & BIT(link_id))) 10868 continue; 10869 10870 ieee80211_sta_remove_link(sta, link_id); 10871 } 10872 10873 /* notify the driver and upper layers */ 10874 ieee80211_vif_cfg_change_notify(sdata, 10875 BSS_CHANGED_MLD_VALID_LINKS); 10876 cfg80211_links_removed(sdata->dev, req->rem_links); 10877 } 10878 10879 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10880 added_links, req->rem_links); 10881 10882 ieee80211_tx_skb(sdata, skb); 10883 10884 sdata->u.mgd.reconf.added_links = added_links; 10885 sdata->u.mgd.reconf.add_links_data = data; 10886 sdata->u.mgd.reconf.removed_links = req->rem_links; 10887 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10888 &sdata->u.mgd.reconf.wk, 10889 IEEE80211_ASSOC_TIMEOUT_SHORT); 10890 return 0; 10891 10892 err_free: 10893 kfree(data); 10894 return err; 10895} 10896 10897static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10898{ 10899 unsigned long valid_links = sdata->vif.valid_links; 10900 u8 link_id; 10901 10902 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10903 10904 if (!ieee80211_vif_is_mld(&sdata->vif)) 10905 return false; 10906 10907 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10908 struct ieee80211_bss_conf *bss_conf = 10909 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10910 10911 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10912 return false; 10913 } 10914 10915 return true; 10916} 10917 10918int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10919{ 10920 struct ieee80211_local *local = sdata->local; 10921 struct ieee80211_mgmt *mgmt; 10922 struct sk_buff *skb; 10923 int frame_len = offsetofend(struct ieee80211_mgmt, 10924 u.action.u.epcs) + (enable ? 1 : 0); 10925 10926 if (!ieee80211_mgd_epcs_supp(sdata)) 10927 return -EINVAL; 10928 10929 if (sdata->u.mgd.epcs.enabled == enable && 10930 !sdata->u.mgd.epcs.dialog_token) 10931 return 0; 10932 10933 /* Do not allow enabling EPCS if the AP didn't respond yet. 10934 * However, allow disabling EPCS in such a case. 10935 */ 10936 if (sdata->u.mgd.epcs.dialog_token && enable) 10937 return -EALREADY; 10938 10939 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10940 if (!skb) 10941 return -ENOBUFS; 10942 10943 skb_reserve(skb, local->hw.extra_tx_headroom); 10944 mgmt = skb_put_zero(skb, frame_len); 10945 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10946 IEEE80211_STYPE_ACTION); 10947 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10948 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10949 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10950 10951 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10952 if (enable) { 10953 u8 *pos = mgmt->u.action.u.epcs.variable; 10954 10955 mgmt->u.action.u.epcs.action_code = 10956 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10957 10958 *pos = ++sdata->u.mgd.dialog_token_alloc; 10959 sdata->u.mgd.epcs.dialog_token = *pos; 10960 } else { 10961 mgmt->u.action.u.epcs.action_code = 10962 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10963 10964 ieee80211_epcs_teardown(sdata); 10965 ieee80211_epcs_changed(sdata, false); 10966 } 10967 10968 ieee80211_tx_skb(sdata, skb); 10969 return 0; 10970} 10971 10972static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10973 struct ieee802_11_elems *elems) 10974{ 10975 const struct element *sub; 10976 size_t scratch_len = elems->ml_epcs_len; 10977 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10978 10979 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10980 10981 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10982 return; 10983 10984 if (WARN_ON(!scratch)) 10985 return; 10986 10987 /* Directly parse the sub elements as the common information doesn't 10988 * hold any useful information. 10989 */ 10990 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10991 elems->ml_epcs_len) { 10992 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10993 struct ieee80211_link_data *link; 10994 u8 *pos = (void *)sub->data; 10995 u16 control; 10996 ssize_t len; 10997 u8 link_id; 10998 10999 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 11000 continue; 11001 11002 if (sub->datalen < sizeof(control)) 11003 break; 11004 11005 control = get_unaligned_le16(pos); 11006 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 11007 11008 link = sdata_dereference(sdata->link[link_id], sdata); 11009 if (!link) 11010 continue; 11011 11012 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 11013 elems->ml_epcs_len, 11014 scratch, scratch_len, 11015 IEEE80211_MLE_SUBELEM_FRAGMENT); 11016 if (len < (ssize_t)sizeof(control)) 11017 continue; 11018 11019 pos = scratch + sizeof(control); 11020 len -= sizeof(control); 11021 11022 link_elems = ieee802_11_parse_elems(pos, len, 11023 IEEE80211_FTYPE_MGMT | 11024 IEEE80211_STYPE_ACTION, 11025 NULL); 11026 if (!link_elems) 11027 continue; 11028 11029 if (ieee80211_sta_wmm_params(sdata->local, link, 11030 link_elems->wmm_param, 11031 link_elems->wmm_param_len, 11032 link_elems->mu_edca_param_set)) 11033 ieee80211_link_info_change_notify(sdata, link, 11034 BSS_CHANGED_QOS); 11035 } 11036} 11037 11038void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11039 struct ieee80211_mgmt *mgmt, size_t len) 11040{ 11041 struct ieee802_11_elems *elems __free(kfree) = NULL; 11042 size_t ies_len; 11043 u16 status_code; 11044 u8 *pos, dialog_token; 11045 11046 if (!ieee80211_mgd_epcs_supp(sdata)) 11047 return; 11048 11049 /* Handle dialog token and status code */ 11050 pos = mgmt->u.action.u.epcs.variable; 11051 dialog_token = *pos; 11052 status_code = get_unaligned_le16(pos + 1); 11053 11054 /* An EPCS enable response with dialog token == 0 is an unsolicited 11055 * notification from the AP MLD. In such a case, EPCS should already be 11056 * enabled and status must be success 11057 */ 11058 if (!dialog_token && 11059 (!sdata->u.mgd.epcs.enabled || 11060 status_code != WLAN_STATUS_SUCCESS)) 11061 return; 11062 11063 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11064 return; 11065 11066 sdata->u.mgd.epcs.dialog_token = 0; 11067 11068 if (status_code != WLAN_STATUS_SUCCESS) 11069 return; 11070 11071 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11072 ies_len = len - offsetof(struct ieee80211_mgmt, 11073 u.action.u.epcs.variable) - 11074 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11075 11076 elems = ieee802_11_parse_elems(pos, ies_len, 11077 IEEE80211_FTYPE_MGMT | 11078 IEEE80211_STYPE_ACTION, 11079 NULL); 11080 if (!elems) 11081 return; 11082 11083 ieee80211_ml_epcs(sdata, elems); 11084 ieee80211_epcs_changed(sdata, true); 11085} 11086 11087void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11088 struct ieee80211_mgmt *mgmt, size_t len) 11089{ 11090 if (!ieee80211_vif_is_mld(&sdata->vif) || 11091 !sdata->u.mgd.epcs.enabled) 11092 return; 11093 11094 ieee80211_epcs_teardown(sdata); 11095 ieee80211_epcs_changed(sdata, false); 11096}
~/
Read-only file preview.