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 - 2025 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 msecs_to_jiffies(100) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 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(elems->s1g_oper, chandef)) { 184 sdata_info(sdata, 185 "Missing S1G Operation Element? Trying operating == primary\n"); 186 chandef->width = ieee80211_s1g_channel_width(channel); 187 } 188 189 return IEEE80211_CONN_MODE_S1G; 190 } 191 192 /* get special 6 GHz case out of the way */ 193 if (sband->band == NL80211_BAND_6GHZ) { 194 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 195 196 /* this is an error */ 197 if (conn->mode < IEEE80211_CONN_MODE_HE) 198 return IEEE80211_CONN_MODE_LEGACY; 199 200 if (!elems->he_6ghz_capa || !elems->he_cap) { 201 sdata_info(sdata, 202 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 203 return IEEE80211_CONN_MODE_LEGACY; 204 } 205 206 if (!eht_oper || !elems->eht_cap) { 207 eht_oper = NULL; 208 mode = IEEE80211_CONN_MODE_HE; 209 } 210 211 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 212 eht_oper, chandef)) { 213 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 214 return IEEE80211_CONN_MODE_LEGACY; 215 } 216 217 return mode; 218 } 219 220 /* now we have the progression HT, VHT, ... */ 221 if (conn->mode < IEEE80211_CONN_MODE_HT) 222 return IEEE80211_CONN_MODE_LEGACY; 223 224 if (!ht_oper || !elems->ht_cap_elem) 225 return IEEE80211_CONN_MODE_LEGACY; 226 227 chandef->width = NL80211_CHAN_WIDTH_20; 228 229 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 230 channel->band); 231 /* check that channel matches the right operating channel */ 232 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 233 /* 234 * It's possible that some APs are confused here; 235 * Netgear WNDR3700 sometimes reports 4 higher than 236 * the actual channel in association responses, but 237 * since we look at probe response/beacon data here 238 * it should be OK. 239 */ 240 sdata_info(sdata, 241 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 242 channel->center_freq, ht_cfreq, 243 ht_oper->primary_chan, channel->band); 244 return IEEE80211_CONN_MODE_LEGACY; 245 } 246 247 ieee80211_chandef_ht_oper(ht_oper, chandef); 248 249 if (conn->mode < IEEE80211_CONN_MODE_VHT) 250 return IEEE80211_CONN_MODE_HT; 251 252 vht_chandef = *chandef; 253 254 /* 255 * having he_cap/he_oper parsed out implies we're at 256 * least operating as HE STA 257 */ 258 if (elems->he_cap && he_oper && 259 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 260 struct ieee80211_vht_operation he_oper_vht_cap; 261 262 /* 263 * Set only first 3 bytes (other 2 aren't used in 264 * ieee80211_chandef_vht_oper() anyway) 265 */ 266 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 267 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 268 269 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 270 &he_oper_vht_cap, ht_oper, 271 &vht_chandef)) { 272 sdata_info(sdata, 273 "HE AP VHT information is invalid, disabling HE\n"); 274 /* this will cause us to re-parse as VHT STA */ 275 return IEEE80211_CONN_MODE_VHT; 276 } 277 } else if (!vht_oper || !elems->vht_cap_elem) { 278 if (sband->band == NL80211_BAND_5GHZ) { 279 sdata_info(sdata, 280 "VHT information is missing, disabling VHT\n"); 281 return IEEE80211_CONN_MODE_HT; 282 } 283 no_vht = true; 284 } else if (sband->band == NL80211_BAND_2GHZ) { 285 no_vht = true; 286 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 287 vht_cap_info, 288 vht_oper, ht_oper, 289 &vht_chandef)) { 290 sdata_info(sdata, 291 "AP VHT information is invalid, disabling VHT\n"); 292 return IEEE80211_CONN_MODE_HT; 293 } 294 295 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 296 sdata_info(sdata, 297 "AP VHT information doesn't match HT, disabling VHT\n"); 298 return IEEE80211_CONN_MODE_HT; 299 } 300 301 *chandef = vht_chandef; 302 303 /* stick to current max mode if we or the AP don't have HE */ 304 if (conn->mode < IEEE80211_CONN_MODE_HE || 305 !elems->he_operation || !elems->he_cap) { 306 if (no_vht) 307 return IEEE80211_CONN_MODE_HT; 308 return IEEE80211_CONN_MODE_VHT; 309 } 310 311 /* stick to HE if we or the AP don't have EHT */ 312 if (conn->mode < IEEE80211_CONN_MODE_EHT || 313 !eht_oper || !elems->eht_cap) 314 return IEEE80211_CONN_MODE_HE; 315 316 /* 317 * handle the case that the EHT operation indicates that it holds EHT 318 * operation information (in case that the channel width differs from 319 * the channel width reported in HT/VHT/HE). 320 */ 321 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 322 struct cfg80211_chan_def eht_chandef = *chandef; 323 324 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 325 &eht_chandef); 326 327 eht_chandef.punctured = 328 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 329 330 if (!cfg80211_chandef_valid(&eht_chandef)) { 331 sdata_info(sdata, 332 "AP EHT information is invalid, disabling EHT\n"); 333 return IEEE80211_CONN_MODE_HE; 334 } 335 336 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 337 sdata_info(sdata, 338 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 339 return IEEE80211_CONN_MODE_HE; 340 } 341 342 *chandef = eht_chandef; 343 } 344 345 return IEEE80211_CONN_MODE_EHT; 346 } 347 348 static bool 349 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 350 struct ieee80211_supported_band *sband, 351 const struct ieee80211_ht_operation *ht_op) 352 { 353 struct ieee80211_sta_ht_cap sta_ht_cap; 354 int i; 355 356 if (sband->band == NL80211_BAND_6GHZ) 357 return true; 358 359 if (!ht_op) 360 return false; 361 362 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 363 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 364 365 /* 366 * P802.11REVme/D7.0 - 6.5.4.2.4 367 * ... 368 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 369 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 370 * in the HT Operation parameter that contains any unsupported MCSs, 371 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 372 * contain a ResultCode parameter that is not set to the value SUCCESS. 373 * ... 374 */ 375 376 /* Simply check that all basic rates are in the STA RX mask */ 377 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 378 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 379 ht_op->basic_set[i]) 380 return false; 381 } 382 383 return true; 384 } 385 386 static bool 387 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 388 int link_id, 389 struct ieee80211_supported_band *sband, 390 const struct ieee80211_vht_operation *vht_op) 391 { 392 struct ieee80211_sta_vht_cap sta_vht_cap; 393 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 394 int nss; 395 396 if (sband->band != NL80211_BAND_5GHZ) 397 return true; 398 399 if (!vht_op) 400 return false; 401 402 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 403 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 404 405 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 406 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 407 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 408 409 /* 410 * Many APs are incorrectly advertising an all-zero value here, 411 * which really means MCS 0-7 are required for 1-8 streams, but 412 * they don't really mean it that way. 413 * Some other APs are incorrectly advertising 3 spatial streams 414 * with MCS 0-7 are required, but don't really mean it that way 415 * and we'll connect only with HT, rather than even HE. 416 * As a result, unfortunately the VHT basic MCS/NSS set cannot 417 * be used at all, so check it only in strict mode. 418 */ 419 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 420 return true; 421 422 /* 423 * P802.11REVme/D7.0 - 6.5.4.2.4 424 * ... 425 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 426 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 427 * field in the VHT Operation parameter that contains any unsupported 428 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 429 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 430 * that is not set to the value SUCCESS. 431 * ... 432 */ 433 for (nss = 8; nss > 0; nss--) { 434 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 435 u8 sta_rx_val; 436 u8 sta_tx_val; 437 438 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 439 continue; 440 441 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 442 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 443 444 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 445 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 446 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 447 link_id_info(sdata, link_id, 448 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 449 nss, sta_rx_val, sta_tx_val, ap_op_val); 450 return false; 451 } 452 } 453 454 return true; 455 } 456 457 static bool 458 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 459 int link_id, 460 const struct ieee80211_he_cap_elem *he_cap, 461 const struct ieee80211_he_operation *he_op) 462 { 463 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 464 u16 mcs_80_map_tx, mcs_80_map_rx; 465 u16 ap_min_req_set; 466 int nss; 467 468 if (!he_cap) 469 return false; 470 471 /* mcs_nss is right after he_cap info */ 472 he_mcs_nss_supp = (void *)(he_cap + 1); 473 474 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 475 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 476 477 /* P802.11-REVme/D0.3 478 * 27.1.1 Introduction to the HE PHY 479 * ... 480 * An HE STA shall support the following features: 481 * ... 482 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 483 * supported channel widths for HE SU PPDUs 484 */ 485 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 486 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 487 link_id_info(sdata, link_id, 488 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 489 mcs_80_map_tx, mcs_80_map_rx); 490 return false; 491 } 492 493 if (!he_op) 494 return true; 495 496 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 497 498 /* 499 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 500 * zeroes, which is nonsense, and completely inconsistent with itself 501 * (it doesn't have 8 streams). Accept the settings in this case anyway. 502 */ 503 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 504 return true; 505 506 /* make sure the AP is consistent with itself 507 * 508 * P802.11-REVme/D0.3 509 * 26.17.1 Basic HE BSS operation 510 * 511 * A STA that is operating in an HE BSS shall be able to receive and 512 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 513 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 514 * MLME-START.request primitive and shall be able to receive at each of 515 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 516 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 517 * primitive 518 */ 519 for (nss = 8; nss > 0; nss--) { 520 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 521 u8 ap_rx_val; 522 u8 ap_tx_val; 523 524 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 525 continue; 526 527 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 528 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 529 530 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 531 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 532 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 533 link_id_info(sdata, link_id, 534 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 535 nss, ap_rx_val, ap_tx_val, ap_op_val); 536 return false; 537 } 538 } 539 540 return true; 541 } 542 543 static bool 544 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 545 struct ieee80211_supported_band *sband, 546 const struct ieee80211_he_operation *he_op) 547 { 548 const struct ieee80211_sta_he_cap *sta_he_cap = 549 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 550 u16 ap_min_req_set; 551 int i; 552 553 if (!sta_he_cap || !he_op) 554 return false; 555 556 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 557 558 /* 559 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 560 * zeroes, which is nonsense, and completely inconsistent with itself 561 * (it doesn't have 8 streams). Accept the settings in this case anyway. 562 */ 563 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 564 return true; 565 566 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 567 for (i = 0; i < 3; i++) { 568 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 569 &sta_he_cap->he_mcs_nss_supp; 570 u16 sta_mcs_map_rx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 572 u16 sta_mcs_map_tx = 573 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 574 u8 nss; 575 bool verified = true; 576 577 /* 578 * For each band there is a maximum of 8 spatial streams 579 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 580 * of 2 bits per NSS (1-8), with the values defined in enum 581 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 582 * capabilities aren't less than the AP's minimum requirements 583 * for this HE BSS per SS. 584 * It is enough to find one such band that meets the reqs. 585 */ 586 for (nss = 8; nss > 0; nss--) { 587 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 588 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 589 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 590 591 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 592 continue; 593 594 /* 595 * Make sure the HE AP doesn't require MCSs that aren't 596 * supported by the client as required by spec 597 * 598 * P802.11-REVme/D0.3 599 * 26.17.1 Basic HE BSS operation 600 * 601 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 602 * a BSS, unless it supports (i.e., is able to both transmit and 603 * receive using) all of the <HE-MCS, NSS> tuples in the basic 604 * HE-MCS and NSS set. 605 */ 606 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 607 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 608 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 609 verified = false; 610 break; 611 } 612 } 613 614 if (verified) 615 return true; 616 } 617 618 /* If here, STA doesn't meet AP's HE min requirements */ 619 return false; 620 } 621 622 static u8 623 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 624 const struct ieee80211_sta_eht_cap *sta_eht_cap, 625 unsigned int idx, int bw) 626 { 627 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 628 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 629 630 /* handle us being a 20 MHz-only EHT STA - with four values 631 * for MCS 0-7, 8-9, 10-11, 12-13. 632 */ 633 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 634 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 635 636 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 637 if (idx > 0) 638 idx--; 639 640 switch (bw) { 641 case 0: 642 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 643 case 1: 644 if (!(he_phy_cap0 & 645 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 646 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 647 return 0xff; /* pass check */ 648 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 649 case 2: 650 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 651 return 0xff; /* pass check */ 652 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 653 } 654 655 WARN_ON(1); 656 return 0; 657 } 658 659 static bool 660 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 661 struct ieee80211_supported_band *sband, 662 const struct ieee80211_eht_operation *eht_op) 663 { 664 const struct ieee80211_sta_he_cap *sta_he_cap = 665 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_sta_eht_cap *sta_eht_cap = 667 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 668 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 669 unsigned int i; 670 671 if (!sta_he_cap || !sta_eht_cap || !eht_op) 672 return false; 673 674 req = &eht_op->basic_mcs_nss; 675 676 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 677 u8 req_rx_nss, req_tx_nss; 678 unsigned int bw; 679 680 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_RX); 682 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 683 IEEE80211_EHT_MCS_NSS_TX); 684 685 for (bw = 0; bw < 3; bw++) { 686 u8 have, have_rx_nss, have_tx_nss; 687 688 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 689 sta_eht_cap, 690 i, bw); 691 have_rx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_RX); 693 have_tx_nss = u8_get_bits(have, 694 IEEE80211_EHT_MCS_NSS_TX); 695 696 if (req_rx_nss > have_rx_nss || 697 req_tx_nss > have_tx_nss) 698 return false; 699 } 700 } 701 702 return true; 703 } 704 705 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 706 const u8 *supp_rates, 707 unsigned int supp_rates_len, 708 const u8 *ext_supp_rates, 709 unsigned int ext_supp_rates_len, 710 u32 *rates, u32 *basic_rates, 711 unsigned long *unknown_rates_selectors, 712 bool *have_higher_than_11mbit, 713 int *min_rate, int *min_rate_index) 714 { 715 int i, j; 716 717 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 718 u8 supp_rate = i < supp_rates_len ? 719 supp_rates[i] : 720 ext_supp_rates[i - supp_rates_len]; 721 int rate = supp_rate & 0x7f; 722 bool is_basic = !!(supp_rate & 0x80); 723 724 if ((rate * 5) > 110 && have_higher_than_11mbit) 725 *have_higher_than_11mbit = true; 726 727 /* 728 * Skip membership selectors since they're not rates. 729 * 730 * Note: Even though the membership selector and the basic 731 * rate flag share the same bit, they are not exactly 732 * the same. 733 */ 734 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 735 if (unknown_rates_selectors) 736 set_bit(rate, unknown_rates_selectors); 737 continue; 738 } 739 740 for (j = 0; j < sband->n_bitrates; j++) { 741 struct ieee80211_rate *br; 742 int brate; 743 744 br = &sband->bitrates[j]; 745 746 brate = DIV_ROUND_UP(br->bitrate, 5); 747 if (brate == rate) { 748 if (rates) 749 *rates |= BIT(j); 750 if (is_basic && basic_rates) 751 *basic_rates |= BIT(j); 752 if (min_rate && (rate * 5) < *min_rate) { 753 *min_rate = rate * 5; 754 if (min_rate_index) 755 *min_rate_index = j; 756 } 757 break; 758 } 759 } 760 761 /* Handle an unknown entry as if it is an unknown selector */ 762 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 763 set_bit(rate, unknown_rates_selectors); 764 } 765 } 766 767 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 768 const struct cfg80211_chan_def *chandef, 769 u32 prohibited_flags) 770 { 771 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 772 chandef, prohibited_flags)) 773 return false; 774 775 if (chandef->punctured && 776 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 777 return false; 778 779 return true; 780 } 781 782 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 783 { 784 if (c->width == NL80211_CHAN_WIDTH_80P80) 785 return 4 + 4; 786 787 return cfg80211_chandef_get_width(c) / 20; 788 } 789 790 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 791 { 792 switch (c->width) { 793 case NL80211_CHAN_WIDTH_20: 794 case NL80211_CHAN_WIDTH_20_NOHT: 795 return 1; 796 case NL80211_CHAN_WIDTH_40: 797 return 2; 798 case NL80211_CHAN_WIDTH_80P80: 799 case NL80211_CHAN_WIDTH_80: 800 return 3; 801 case NL80211_CHAN_WIDTH_160: 802 return 4; 803 case NL80211_CHAN_WIDTH_320: 804 return 5; 805 default: 806 WARN_ON(1); 807 return 0; 808 } 809 } 810 811 VISIBLE_IF_MAC80211_KUNIT int 812 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 813 u8 n_partial_subchans) 814 { 815 int n = ieee80211_chandef_num_subchans(ap); 816 struct cfg80211_chan_def tmp = *ap; 817 int offset = 0; 818 819 /* 820 * Given a chandef (in this context, it's the AP's) and a number 821 * of subchannels that we want to look at ('n_partial_subchans'), 822 * calculate the offset in number of subchannels between the full 823 * and the subset with the desired width. 824 */ 825 826 /* same number of subchannels means no offset, obviously */ 827 if (n == n_partial_subchans) 828 return 0; 829 830 /* don't WARN - misconfigured APs could cause this if their N > width */ 831 if (n < n_partial_subchans) 832 return 0; 833 834 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 835 u32 prev = tmp.center_freq1; 836 837 ieee80211_chandef_downgrade(&tmp, NULL); 838 839 /* 840 * if center_freq moved up, half the original channels 841 * are gone now but were below, so increase offset 842 */ 843 if (prev < tmp.center_freq1) 844 offset += ieee80211_chandef_num_subchans(&tmp); 845 } 846 847 /* 848 * 80+80 with secondary 80 below primary - four subchannels for it 849 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 850 */ 851 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 852 ap->center_freq2 < ap->center_freq1) 853 offset += 4; 854 855 return offset; 856 } 857 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 858 859 VISIBLE_IF_MAC80211_KUNIT void 860 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 861 const struct cfg80211_chan_def *ap, 862 const struct cfg80211_chan_def *used) 863 { 864 u8 needed = ieee80211_chandef_num_subchans(used); 865 u8 have = ieee80211_chandef_num_subchans(ap); 866 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 867 u8 offset; 868 869 if (!psd->valid) 870 return; 871 872 /* if N is zero, all defaults were used, no point in rearranging */ 873 if (!psd->n) 874 goto out; 875 876 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 877 878 /* 879 * This assumes that 'N' is consistent with the HE channel, as 880 * it should be (otherwise the AP is broken). 881 * 882 * In psd->power we have values in the order 0..N, 0..K, where 883 * N+K should cover the entire channel per 'ap', but even if it 884 * doesn't then we've pre-filled 'unlimited' as defaults. 885 * 886 * But this is all the wrong order, we want to have them in the 887 * order of the 'used' channel. 888 * 889 * So for example, we could have a 320 MHz EHT AP, which has the 890 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 891 * seem to be considered for the TPE), as follows: 892 * 893 * EHT 320: | | | | | | | | | | | | | | | | | 894 * HE 80: | | | | | 895 * used 160: | | | | | | | | | 896 * 897 * N entries: |--|--|--|--| 898 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 899 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 900 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 901 * used chan: 0 1 2 3 4 5 6 7 902 * 903 * The idx in the power array ('power idx') is like this since it 904 * comes directly from the element's N and K entries in their 905 * element order, and those are this way for HE compatibility. 906 * 907 * Rearrange them as desired here, first by putting them into the 908 * 'full chan' order, and then selecting the necessary subset for 909 * the 'used chan'. 910 */ 911 912 /* first reorder according to AP channel */ 913 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 914 for (int i = 0; i < have; i++) { 915 if (i < offset) 916 tmp[i] = psd->power[i + psd->n]; 917 else if (i < offset + psd->n) 918 tmp[i] = psd->power[i - offset]; 919 else 920 tmp[i] = psd->power[i]; 921 } 922 923 /* 924 * and then select the subset for the used channel 925 * (set everything to defaults first in case a driver is confused) 926 */ 927 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 928 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 929 for (int i = 0; i < needed; i++) 930 psd->power[i] = tmp[offset + i]; 931 932 out: 933 /* limit, but don't lie if there are defaults in the data */ 934 if (needed < psd->count) 935 psd->count = needed; 936 } 937 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 938 939 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 940 const struct cfg80211_chan_def *ap, 941 const struct cfg80211_chan_def *used) 942 { 943 /* ignore this completely for narrow/invalid channels */ 944 if (!ieee80211_chandef_num_subchans(ap) || 945 !ieee80211_chandef_num_subchans(used)) { 946 ieee80211_clear_tpe(tpe); 947 return; 948 } 949 950 for (int i = 0; i < 2; i++) { 951 int needed_pwr_count; 952 953 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 954 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 955 956 /* limit this to the widths we actually need */ 957 needed_pwr_count = ieee80211_chandef_num_widths(used); 958 if (needed_pwr_count < tpe->max_local[i].count) 959 tpe->max_local[i].count = needed_pwr_count; 960 if (needed_pwr_count < tpe->max_reg_client[i].count) 961 tpe->max_reg_client[i].count = needed_pwr_count; 962 } 963 } 964 965 /* 966 * The AP part of the channel request is used to distinguish settings 967 * to the device used for wider bandwidth OFDMA. This is used in the 968 * channel context code to assign two channel contexts even if they're 969 * both for the same channel, if the AP bandwidths are incompatible. 970 * If not EHT (or driver override) then ap.chan == NULL indicates that 971 * there's no wider BW OFDMA used. 972 */ 973 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 974 struct ieee80211_chan_req *chanreq, 975 struct ieee80211_conn_settings *conn, 976 struct cfg80211_chan_def *ap_chandef) 977 { 978 chanreq->ap.chan = NULL; 979 980 if (conn->mode < IEEE80211_CONN_MODE_EHT) 981 return; 982 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 983 return; 984 985 chanreq->ap = *ap_chandef; 986 } 987 988 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 989 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 990 struct ieee80211_conn_settings *conn, 991 struct cfg80211_bss *cbss, int link_id, 992 struct ieee80211_chan_req *chanreq, 993 struct cfg80211_chan_def *ap_chandef, 994 unsigned long *userspace_selectors) 995 { 996 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 997 struct ieee80211_bss *bss = (void *)cbss->priv; 998 struct ieee80211_channel *channel = cbss->channel; 999 struct ieee80211_elems_parse_params parse_params = { 1000 .link_id = -1, 1001 .from_ap = true, 1002 .start = ies->data, 1003 .len = ies->len, 1004 }; 1005 struct ieee802_11_elems *elems; 1006 struct ieee80211_supported_band *sband; 1007 enum ieee80211_conn_mode ap_mode; 1008 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1009 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1010 int ret; 1011 1012 again: 1013 parse_params.mode = conn->mode; 1014 elems = ieee802_11_parse_elems_full(&parse_params); 1015 if (!elems) 1016 return ERR_PTR(-ENOMEM); 1017 1018 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1019 elems, false, conn, ap_chandef); 1020 1021 /* this should be impossible since parsing depends on our mode */ 1022 if (WARN_ON(ap_mode > conn->mode)) { 1023 ret = -EINVAL; 1024 goto free; 1025 } 1026 1027 if (conn->mode != ap_mode) { 1028 conn->mode = ap_mode; 1029 kfree(elems); 1030 goto again; 1031 } 1032 1033 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1034 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1035 1036 sband = sdata->local->hw.wiphy->bands[channel->band]; 1037 1038 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1039 elems->ext_supp_rates, elems->ext_supp_rates_len, 1040 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1041 NULL); 1042 1043 switch (channel->band) { 1044 case NL80211_BAND_S1GHZ: 1045 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1046 ret = -EINVAL; 1047 goto free; 1048 } 1049 return elems; 1050 case NL80211_BAND_6GHZ: 1051 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1052 link_id_info(sdata, link_id, 1053 "Rejecting non-HE 6/7 GHz connection"); 1054 ret = -EINVAL; 1055 goto free; 1056 } 1057 break; 1058 default: 1059 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1060 ret = -EINVAL; 1061 goto free; 1062 } 1063 } 1064 1065 switch (ap_mode) { 1066 case IEEE80211_CONN_MODE_S1G: 1067 WARN_ON(1); 1068 ret = -EINVAL; 1069 goto free; 1070 case IEEE80211_CONN_MODE_LEGACY: 1071 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1072 break; 1073 case IEEE80211_CONN_MODE_HT: 1074 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1075 conn->bw_limit, 1076 IEEE80211_CONN_BW_LIMIT_40); 1077 break; 1078 case IEEE80211_CONN_MODE_VHT: 1079 case IEEE80211_CONN_MODE_HE: 1080 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1081 conn->bw_limit, 1082 IEEE80211_CONN_BW_LIMIT_160); 1083 break; 1084 case IEEE80211_CONN_MODE_EHT: 1085 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1086 conn->bw_limit, 1087 IEEE80211_CONN_BW_LIMIT_320); 1088 break; 1089 } 1090 1091 chanreq->oper = *ap_chandef; 1092 1093 bitmap_copy(sta_selectors, userspace_selectors, 128); 1094 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1095 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1096 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1097 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1098 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1099 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1100 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1101 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1102 1103 /* 1104 * We do not support EPD or GLK so never add them. 1105 * SAE_H2E is handled through userspace_selectors. 1106 */ 1107 1108 /* Check if we support all required features */ 1109 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1110 link_id_info(sdata, link_id, 1111 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1112 ret = -EINVAL; 1113 goto free; 1114 } 1115 1116 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1117 1118 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1119 IEEE80211_CHAN_DISABLED)) { 1120 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1121 ret = -EINVAL; 1122 goto free; 1123 } 1124 1125 ieee80211_chanreq_downgrade(chanreq, conn); 1126 } 1127 1128 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1129 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1130 IEEE80211_CHAN_NO_HE)) { 1131 conn->mode = IEEE80211_CONN_MODE_VHT; 1132 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1133 conn->bw_limit, 1134 IEEE80211_CONN_BW_LIMIT_160); 1135 } 1136 1137 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1138 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1139 IEEE80211_CHAN_NO_EHT)) { 1140 conn->mode = IEEE80211_CONN_MODE_HE; 1141 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1142 conn->bw_limit, 1143 IEEE80211_CONN_BW_LIMIT_160); 1144 } 1145 1146 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1147 link_id_info(sdata, link_id, 1148 "regulatory prevented using AP config, downgraded\n"); 1149 1150 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1151 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1152 elems->ht_operation)) { 1153 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1154 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1155 link_id_info(sdata, link_id, 1156 "required MCSes not supported, disabling HT\n"); 1157 } 1158 1159 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1160 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1161 elems->vht_operation)) { 1162 conn->mode = IEEE80211_CONN_MODE_HT; 1163 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1164 conn->bw_limit, 1165 IEEE80211_CONN_BW_LIMIT_40); 1166 link_id_info(sdata, link_id, 1167 "required MCSes not supported, disabling VHT\n"); 1168 } 1169 1170 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1171 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1172 (void *)elems->he_cap, 1173 elems->he_operation) || 1174 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1175 elems->he_operation))) { 1176 conn->mode = IEEE80211_CONN_MODE_VHT; 1177 link_id_info(sdata, link_id, 1178 "required MCSes not supported, disabling HE\n"); 1179 } 1180 1181 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1182 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1183 elems->eht_operation)) { 1184 conn->mode = IEEE80211_CONN_MODE_HE; 1185 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1186 conn->bw_limit, 1187 IEEE80211_CONN_BW_LIMIT_160); 1188 link_id_info(sdata, link_id, 1189 "required MCSes not supported, disabling EHT\n"); 1190 } 1191 1192 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1193 channel->band != NL80211_BAND_2GHZ && 1194 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1195 conn->mode = IEEE80211_CONN_MODE_HE; 1196 link_id_info(sdata, link_id, 1197 "required bandwidth not supported, disabling EHT\n"); 1198 } 1199 1200 /* the mode can only decrease, so this must terminate */ 1201 if (ap_mode != conn->mode) { 1202 kfree(elems); 1203 goto again; 1204 } 1205 1206 mlme_link_id_dbg(sdata, link_id, 1207 "connecting with %s mode, max bandwidth %d MHz\n", 1208 ieee80211_conn_mode_str(conn->mode), 1209 20 * (1 << conn->bw_limit)); 1210 1211 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1212 ret = -EINVAL; 1213 goto free; 1214 } 1215 1216 return elems; 1217 free: 1218 kfree(elems); 1219 return ERR_PTR(ret); 1220 } 1221 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1222 1223 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1224 struct ieee802_11_elems *elems, 1225 bool update, u64 *changed, u16 stype) 1226 { 1227 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1228 struct ieee80211_sub_if_data *sdata = link->sdata; 1229 struct ieee80211_chan_req chanreq = {}; 1230 struct cfg80211_chan_def ap_chandef; 1231 enum ieee80211_conn_mode ap_mode; 1232 const char *frame; 1233 u32 vht_cap_info = 0; 1234 u16 ht_opmode; 1235 int ret; 1236 1237 switch (stype) { 1238 case IEEE80211_STYPE_BEACON: 1239 frame = "beacon"; 1240 break; 1241 case IEEE80211_STYPE_ASSOC_RESP: 1242 frame = "assoc response"; 1243 break; 1244 case IEEE80211_STYPE_REASSOC_RESP: 1245 frame = "reassoc response"; 1246 break; 1247 case IEEE80211_STYPE_ACTION: 1248 /* the only action frame that gets here */ 1249 frame = "ML reconf response"; 1250 break; 1251 default: 1252 return -EINVAL; 1253 } 1254 1255 /* don't track any bandwidth changes in legacy/S1G modes */ 1256 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1257 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1258 return 0; 1259 1260 if (elems->vht_cap_elem) 1261 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1262 1263 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1264 elems, true, &link->u.mgd.conn, 1265 &ap_chandef); 1266 1267 if (ap_mode != link->u.mgd.conn.mode) { 1268 link_info(link, 1269 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1270 link->u.mgd.bssid, 1271 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1272 ieee80211_conn_mode_str(ap_mode), frame); 1273 return -EINVAL; 1274 } 1275 1276 chanreq.oper = ap_chandef; 1277 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1278 &ap_chandef); 1279 1280 /* 1281 * if HT operation mode changed store the new one - 1282 * this may be applicable even if channel is identical 1283 */ 1284 if (elems->ht_operation) { 1285 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1286 if (link->conf->ht_operation_mode != ht_opmode) { 1287 *changed |= BSS_CHANGED_HT; 1288 link->conf->ht_operation_mode = ht_opmode; 1289 } 1290 } 1291 1292 /* 1293 * Downgrade the new channel if we associated with restricted 1294 * bandwidth capabilities. For example, if we associated as a 1295 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1296 * or config reasons) then switching to a 40 MHz channel now 1297 * won't do us any good -- we couldn't use it with the AP. 1298 */ 1299 while (link->u.mgd.conn.bw_limit < 1300 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1301 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1302 1303 /* TPE element is not present in (re)assoc/ML reconfig response */ 1304 if (stype == IEEE80211_STYPE_BEACON && 1305 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1306 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1307 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1308 &chanreq.oper); 1309 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1310 link->conf->tpe = elems->tpe; 1311 *changed |= BSS_CHANGED_TPE; 1312 } 1313 } 1314 1315 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1316 return 0; 1317 1318 link_info(link, 1319 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1320 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1321 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1322 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1323 chanreq.oper.center_freq2); 1324 1325 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1326 sdata_info(sdata, 1327 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1328 link->u.mgd.bssid, frame); 1329 return -EINVAL; 1330 } 1331 1332 if (!update) { 1333 link->conf->chanreq = chanreq; 1334 return 0; 1335 } 1336 1337 /* 1338 * We're tracking the current AP here, so don't do any further checks 1339 * here. This keeps us from playing ping-pong with regulatory, without 1340 * it the following can happen (for example): 1341 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1342 * - AP advertises regdom US 1343 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1344 * - we detect an unsupported channel and disconnect 1345 * - disconnect causes CRDA to reload world regdomain and the game 1346 * starts anew. 1347 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1348 * 1349 * It seems possible that there are still scenarios with CSA or real 1350 * bandwidth changes where a this could happen, but those cases are 1351 * less common and wouldn't completely prevent using the AP. 1352 */ 1353 1354 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1355 if (ret) { 1356 sdata_info(sdata, 1357 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1358 link->u.mgd.bssid, frame); 1359 return ret; 1360 } 1361 1362 cfg80211_schedule_channels_check(&sdata->wdev); 1363 return 0; 1364 } 1365 1366 /* frame sending functions */ 1367 1368 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1369 struct sk_buff *skb, u8 ap_ht_param, 1370 struct ieee80211_supported_band *sband, 1371 struct ieee80211_channel *channel, 1372 enum ieee80211_smps_mode smps, 1373 const struct ieee80211_conn_settings *conn) 1374 { 1375 u8 *pos; 1376 u32 flags = channel->flags; 1377 u16 cap; 1378 struct ieee80211_sta_ht_cap ht_cap; 1379 1380 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1381 1382 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1383 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1384 1385 /* determine capability flags */ 1386 cap = ht_cap.cap; 1387 1388 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1389 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1390 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1391 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1392 cap &= ~IEEE80211_HT_CAP_SGI_40; 1393 } 1394 break; 1395 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1396 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1397 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1398 cap &= ~IEEE80211_HT_CAP_SGI_40; 1399 } 1400 break; 1401 } 1402 1403 /* 1404 * If 40 MHz was disabled associate as though we weren't 1405 * capable of 40 MHz -- some broken APs will never fall 1406 * back to trying to transmit in 20 MHz. 1407 */ 1408 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1409 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1410 cap &= ~IEEE80211_HT_CAP_SGI_40; 1411 } 1412 1413 /* set SM PS mode properly */ 1414 cap &= ~IEEE80211_HT_CAP_SM_PS; 1415 switch (smps) { 1416 case IEEE80211_SMPS_AUTOMATIC: 1417 case IEEE80211_SMPS_NUM_MODES: 1418 WARN_ON(1); 1419 fallthrough; 1420 case IEEE80211_SMPS_OFF: 1421 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1422 IEEE80211_HT_CAP_SM_PS_SHIFT; 1423 break; 1424 case IEEE80211_SMPS_STATIC: 1425 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1426 IEEE80211_HT_CAP_SM_PS_SHIFT; 1427 break; 1428 case IEEE80211_SMPS_DYNAMIC: 1429 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1430 IEEE80211_HT_CAP_SM_PS_SHIFT; 1431 break; 1432 } 1433 1434 /* reserve and fill IE */ 1435 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1436 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1437 } 1438 1439 /* This function determines vht capability flags for the association 1440 * and builds the IE. 1441 * Note - the function returns true to own the MU-MIMO capability 1442 */ 1443 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1444 struct sk_buff *skb, 1445 struct ieee80211_supported_band *sband, 1446 struct ieee80211_vht_cap *ap_vht_cap, 1447 const struct ieee80211_conn_settings *conn) 1448 { 1449 struct ieee80211_local *local = sdata->local; 1450 u8 *pos; 1451 u32 cap; 1452 struct ieee80211_sta_vht_cap vht_cap; 1453 u32 mask, ap_bf_sts, our_bf_sts; 1454 bool mu_mimo_owner = false; 1455 1456 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1457 1458 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1459 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1460 1461 /* determine capability flags */ 1462 cap = vht_cap.cap; 1463 1464 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1465 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1466 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1467 } 1468 1469 /* 1470 * Some APs apparently get confused if our capabilities are better 1471 * than theirs, so restrict what we advertise in the assoc request. 1472 */ 1473 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1474 if (!(ap_vht_cap->vht_cap_info & 1475 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1476 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1477 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1478 else if (!(ap_vht_cap->vht_cap_info & 1479 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1480 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1481 } 1482 1483 /* 1484 * If some other vif is using the MU-MIMO capability we cannot associate 1485 * using MU-MIMO - this will lead to contradictions in the group-id 1486 * mechanism. 1487 * Ownership is defined since association request, in order to avoid 1488 * simultaneous associations with MU-MIMO. 1489 */ 1490 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1491 bool disable_mu_mimo = false; 1492 struct ieee80211_sub_if_data *other; 1493 1494 list_for_each_entry(other, &local->interfaces, list) { 1495 if (other->vif.bss_conf.mu_mimo_owner) { 1496 disable_mu_mimo = true; 1497 break; 1498 } 1499 } 1500 if (disable_mu_mimo) 1501 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1502 else 1503 mu_mimo_owner = true; 1504 } 1505 1506 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1507 1508 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1509 our_bf_sts = cap & mask; 1510 1511 if (ap_bf_sts < our_bf_sts) { 1512 cap &= ~mask; 1513 cap |= ap_bf_sts; 1514 } 1515 1516 /* reserve and fill IE */ 1517 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1518 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1519 1520 return mu_mimo_owner; 1521 } 1522 1523 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1524 struct sk_buff *skb, 1525 enum nl80211_chan_width width, 1526 struct ieee80211_supported_band *sband, 1527 struct ieee80211_mgd_assoc_data *assoc_data) 1528 { 1529 u32 rates; 1530 1531 if (assoc_data->supp_rates_len && 1532 !ieee80211_hw_check(&local->hw, STRICT)) { 1533 /* 1534 * Get all rates supported by the device and the AP as 1535 * some APs don't like getting a superset of their rates 1536 * in the association request (e.g. D-Link DAP 1353 in 1537 * b-only mode)... 1538 */ 1539 ieee80211_parse_bitrates(width, sband, 1540 assoc_data->supp_rates, 1541 assoc_data->supp_rates_len, 1542 &rates); 1543 } else { 1544 /* 1545 * In case AP not provide any supported rates information 1546 * before association, we send information element(s) with 1547 * all rates that we support. 1548 */ 1549 rates = ~0; 1550 } 1551 1552 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1553 WLAN_EID_SUPP_RATES); 1554 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1555 WLAN_EID_EXT_SUPP_RATES); 1556 } 1557 1558 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1559 const u8 *elems, 1560 size_t elems_len, 1561 size_t offset) 1562 { 1563 size_t noffset; 1564 1565 static const u8 before_ht[] = { 1566 WLAN_EID_SSID, 1567 WLAN_EID_SUPP_RATES, 1568 WLAN_EID_EXT_SUPP_RATES, 1569 WLAN_EID_PWR_CAPABILITY, 1570 WLAN_EID_SUPPORTED_CHANNELS, 1571 WLAN_EID_RSN, 1572 WLAN_EID_QOS_CAPA, 1573 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1574 WLAN_EID_MOBILITY_DOMAIN, 1575 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1576 WLAN_EID_RIC_DATA, /* reassoc only */ 1577 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1578 }; 1579 static const u8 after_ric[] = { 1580 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1581 WLAN_EID_HT_CAPABILITY, 1582 WLAN_EID_BSS_COEX_2040, 1583 /* luckily this is almost always there */ 1584 WLAN_EID_EXT_CAPABILITY, 1585 WLAN_EID_QOS_TRAFFIC_CAPA, 1586 WLAN_EID_TIM_BCAST_REQ, 1587 WLAN_EID_INTERWORKING, 1588 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1589 WLAN_EID_VHT_CAPABILITY, 1590 WLAN_EID_OPMODE_NOTIF, 1591 }; 1592 1593 if (!elems_len) 1594 return offset; 1595 1596 noffset = ieee80211_ie_split_ric(elems, elems_len, 1597 before_ht, 1598 ARRAY_SIZE(before_ht), 1599 after_ric, 1600 ARRAY_SIZE(after_ric), 1601 offset); 1602 skb_put_data(skb, elems + offset, noffset - offset); 1603 1604 return noffset; 1605 } 1606 1607 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1608 const u8 *elems, 1609 size_t elems_len, 1610 size_t offset) 1611 { 1612 static const u8 before_vht[] = { 1613 /* 1614 * no need to list the ones split off before HT 1615 * or generated here 1616 */ 1617 WLAN_EID_BSS_COEX_2040, 1618 WLAN_EID_EXT_CAPABILITY, 1619 WLAN_EID_QOS_TRAFFIC_CAPA, 1620 WLAN_EID_TIM_BCAST_REQ, 1621 WLAN_EID_INTERWORKING, 1622 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1623 }; 1624 size_t noffset; 1625 1626 if (!elems_len) 1627 return offset; 1628 1629 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1630 noffset = ieee80211_ie_split(elems, elems_len, 1631 before_vht, ARRAY_SIZE(before_vht), 1632 offset); 1633 skb_put_data(skb, elems + offset, noffset - offset); 1634 1635 return noffset; 1636 } 1637 1638 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1639 const u8 *elems, 1640 size_t elems_len, 1641 size_t offset) 1642 { 1643 static const u8 before_he[] = { 1644 /* 1645 * no need to list the ones split off before VHT 1646 * or generated here 1647 */ 1648 WLAN_EID_OPMODE_NOTIF, 1649 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1650 /* 11ai elements */ 1651 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1652 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1653 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1654 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1655 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1656 /* TODO: add 11ah/11aj/11ak elements */ 1657 }; 1658 size_t noffset; 1659 1660 if (!elems_len) 1661 return offset; 1662 1663 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1664 noffset = ieee80211_ie_split(elems, elems_len, 1665 before_he, ARRAY_SIZE(before_he), 1666 offset); 1667 skb_put_data(skb, elems + offset, noffset - offset); 1668 1669 return noffset; 1670 } 1671 1672 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1673 const u8 *elems, size_t elems_len, 1674 size_t offset) 1675 { 1676 static const u8 before_reg_conn[] = { 1677 /* 1678 * no need to list the ones split off before HE 1679 * or generated here 1680 */ 1681 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1682 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1683 }; 1684 size_t noffset; 1685 1686 if (!elems_len) 1687 return offset; 1688 1689 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1690 ARRAY_SIZE(before_reg_conn), offset); 1691 skb_put_data(skb, elems + offset, noffset - offset); 1692 1693 return noffset; 1694 } 1695 1696 #define PRESENT_ELEMS_MAX 8 1697 #define PRESENT_ELEM_EXT_OFFS 0x100 1698 1699 static void 1700 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1701 struct sk_buff *skb, u16 capab, 1702 const struct element *ext_capa, 1703 const u16 *present_elems, 1704 struct ieee80211_mgd_assoc_data *assoc_data); 1705 1706 static size_t 1707 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1708 struct sk_buff *skb, u16 *capab, 1709 const struct element *ext_capa, 1710 const u8 *extra_elems, 1711 size_t extra_elems_len, 1712 unsigned int link_id, 1713 struct ieee80211_link_data *link, 1714 u16 *present_elems, 1715 struct ieee80211_mgd_assoc_data *assoc_data) 1716 { 1717 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1718 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1719 struct ieee80211_channel *chan = cbss->channel; 1720 const struct ieee80211_sband_iftype_data *iftd; 1721 struct ieee80211_local *local = sdata->local; 1722 struct ieee80211_supported_band *sband; 1723 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1724 struct ieee80211_chanctx_conf *chanctx_conf; 1725 enum ieee80211_smps_mode smps_mode; 1726 u16 orig_capab = *capab; 1727 size_t offset = 0; 1728 int present_elems_len = 0; 1729 u8 *pos; 1730 int i; 1731 1732 #define ADD_PRESENT_ELEM(id) do { \ 1733 /* need a last for termination - we use 0 == SSID */ \ 1734 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1735 present_elems[present_elems_len++] = (id); \ 1736 } while (0) 1737 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1738 1739 if (link) 1740 smps_mode = link->smps_mode; 1741 else if (sdata->u.mgd.powersave) 1742 smps_mode = IEEE80211_SMPS_DYNAMIC; 1743 else 1744 smps_mode = IEEE80211_SMPS_OFF; 1745 1746 if (link) { 1747 /* 1748 * 5/10 MHz scenarios are only viable without MLO, in which 1749 * case this pointer should be used ... All of this is a bit 1750 * unclear though, not sure this even works at all. 1751 */ 1752 rcu_read_lock(); 1753 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1754 if (chanctx_conf) 1755 width = chanctx_conf->def.width; 1756 rcu_read_unlock(); 1757 } 1758 1759 sband = local->hw.wiphy->bands[chan->band]; 1760 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1761 1762 if (sband->band == NL80211_BAND_2GHZ) { 1763 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1764 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1765 } 1766 1767 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1768 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1769 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1770 1771 if (sband->band != NL80211_BAND_S1GHZ) 1772 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1773 1774 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1775 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1776 struct cfg80211_chan_def chandef = { 1777 .width = width, 1778 .chan = chan, 1779 }; 1780 1781 pos = skb_put(skb, 4); 1782 *pos++ = WLAN_EID_PWR_CAPABILITY; 1783 *pos++ = 2; 1784 *pos++ = 0; /* min tx power */ 1785 /* max tx power */ 1786 *pos++ = ieee80211_chandef_max_power(&chandef); 1787 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1788 } 1789 1790 /* 1791 * Per spec, we shouldn't include the list of channels if we advertise 1792 * support for extended channel switching, but we've always done that; 1793 * (for now?) apply this restriction only on the (new) 6 GHz band. 1794 */ 1795 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1796 (sband->band != NL80211_BAND_6GHZ || 1797 !ext_capa || ext_capa->datalen < 1 || 1798 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1799 /* TODO: get this in reg domain format */ 1800 pos = skb_put(skb, 2 * sband->n_channels + 2); 1801 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1802 *pos++ = 2 * sband->n_channels; 1803 for (i = 0; i < sband->n_channels; i++) { 1804 int cf = sband->channels[i].center_freq; 1805 1806 *pos++ = ieee80211_frequency_to_channel(cf); 1807 *pos++ = 1; /* one channel in the subband*/ 1808 } 1809 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1810 } 1811 1812 /* if present, add any custom IEs that go before HT */ 1813 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1814 extra_elems_len, 1815 offset); 1816 1817 if (sband->band != NL80211_BAND_6GHZ && 1818 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1819 ieee80211_add_ht_ie(sdata, skb, 1820 assoc_data->link[link_id].ap_ht_param, 1821 sband, chan, smps_mode, 1822 &assoc_data->link[link_id].conn); 1823 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1824 } 1825 1826 /* if present, add any custom IEs that go before VHT */ 1827 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1828 extra_elems_len, 1829 offset); 1830 1831 if (sband->band != NL80211_BAND_6GHZ && 1832 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1833 sband->vht_cap.vht_supported) { 1834 bool mu_mimo_owner = 1835 ieee80211_add_vht_ie(sdata, skb, sband, 1836 &assoc_data->link[link_id].ap_vht_cap, 1837 &assoc_data->link[link_id].conn); 1838 1839 if (link) 1840 link->conf->mu_mimo_owner = mu_mimo_owner; 1841 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1842 } 1843 1844 /* if present, add any custom IEs that go before HE */ 1845 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1846 extra_elems_len, 1847 offset); 1848 1849 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1850 ieee80211_put_he_cap(skb, sdata, sband, 1851 &assoc_data->link[link_id].conn); 1852 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1853 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1854 } 1855 1856 /* 1857 * if present, add any custom IEs that go before regulatory 1858 * connectivity element 1859 */ 1860 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1861 extra_elems_len, offset); 1862 1863 if (sband->band == NL80211_BAND_6GHZ) { 1864 /* 1865 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1866 * capable of operating on the 6 GHz band shall transmit 1867 * regulatory connectivity element. 1868 */ 1869 ieee80211_put_reg_conn(skb, chan->flags); 1870 } 1871 1872 /* 1873 * careful - need to know about all the present elems before 1874 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1875 * we're going to put it after the ML element 1876 */ 1877 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1878 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1879 1880 if (link_id == assoc_data->assoc_link_id) 1881 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1882 present_elems, assoc_data); 1883 1884 /* crash if somebody gets it wrong */ 1885 present_elems = NULL; 1886 1887 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1888 ieee80211_put_eht_cap(skb, sdata, sband, 1889 &assoc_data->link[link_id].conn); 1890 1891 if (sband->band == NL80211_BAND_S1GHZ) { 1892 ieee80211_add_aid_request_ie(sdata, skb); 1893 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1894 } 1895 1896 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1897 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1898 1899 return offset; 1900 } 1901 1902 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1903 const u16 *outer, 1904 const u16 *inner) 1905 { 1906 unsigned int skb_len = skb->len; 1907 bool at_extension = false; 1908 bool added = false; 1909 int i, j; 1910 u8 *len, *list_len = NULL; 1911 1912 skb_put_u8(skb, WLAN_EID_EXTENSION); 1913 len = skb_put(skb, 1); 1914 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1915 1916 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1917 u16 elem = outer[i]; 1918 bool have_inner = false; 1919 1920 /* should at least be sorted in the sense of normal -> ext */ 1921 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1922 1923 /* switch to extension list */ 1924 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1925 at_extension = true; 1926 if (!list_len) 1927 skb_put_u8(skb, 0); 1928 list_len = NULL; 1929 } 1930 1931 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1932 if (elem == inner[j]) { 1933 have_inner = true; 1934 break; 1935 } 1936 } 1937 1938 if (have_inner) 1939 continue; 1940 1941 if (!list_len) { 1942 list_len = skb_put(skb, 1); 1943 *list_len = 0; 1944 } 1945 *list_len += 1; 1946 skb_put_u8(skb, (u8)elem); 1947 added = true; 1948 } 1949 1950 /* if we added a list but no extension list, make a zero-len one */ 1951 if (added && (!at_extension || !list_len)) 1952 skb_put_u8(skb, 0); 1953 1954 /* if nothing added remove extension element completely */ 1955 if (!added) 1956 skb_trim(skb, skb_len); 1957 else 1958 *len = skb->len - skb_len - 2; 1959 } 1960 1961 static void 1962 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1963 struct sk_buff *skb, u16 capab, 1964 const struct element *ext_capa, 1965 const u16 *outer_present_elems, 1966 struct ieee80211_mgd_assoc_data *assoc_data) 1967 { 1968 struct ieee80211_local *local = sdata->local; 1969 struct ieee80211_multi_link_elem *ml_elem; 1970 struct ieee80211_mle_basic_common_info *common; 1971 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1972 __le16 eml_capa = 0, mld_capa_ops = 0; 1973 unsigned int link_id; 1974 u8 *ml_elem_len; 1975 void *capab_pos; 1976 1977 if (!ieee80211_vif_is_mld(&sdata->vif)) 1978 return; 1979 1980 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1981 ieee80211_vif_type_p2p(&sdata->vif)); 1982 if (ift_ext_capa) { 1983 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1984 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1985 } 1986 1987 skb_put_u8(skb, WLAN_EID_EXTENSION); 1988 ml_elem_len = skb_put(skb, 1); 1989 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1990 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1991 ml_elem->control = 1992 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1993 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1994 common = skb_put(skb, sizeof(*common)); 1995 common->len = sizeof(*common) + 1996 2; /* MLD capa/ops */ 1997 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1998 1999 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2000 if (eml_capa & 2001 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2002 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2003 common->len += 2; /* EML capabilities */ 2004 ml_elem->control |= 2005 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2006 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2007 } 2008 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2009 2010 if (assoc_data->ext_mld_capa_ops) { 2011 ml_elem->control |= 2012 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2013 common->len += 2; 2014 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2015 sizeof(assoc_data->ext_mld_capa_ops)); 2016 } 2017 2018 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2019 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2020 const u8 *extra_elems; 2021 size_t extra_elems_len; 2022 size_t extra_used; 2023 u8 *subelem_len = NULL; 2024 __le16 ctrl; 2025 2026 if (!assoc_data->link[link_id].bss || 2027 link_id == assoc_data->assoc_link_id) 2028 continue; 2029 2030 extra_elems = assoc_data->link[link_id].elems; 2031 extra_elems_len = assoc_data->link[link_id].elems_len; 2032 2033 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2034 subelem_len = skb_put(skb, 1); 2035 2036 ctrl = cpu_to_le16(link_id | 2037 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2038 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2039 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2040 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2041 skb_put_data(skb, assoc_data->link[link_id].addr, 2042 ETH_ALEN); 2043 /* 2044 * Now add the contents of the (re)association request, 2045 * but the "listen interval" and "current AP address" 2046 * (if applicable) are skipped. So we only have 2047 * the capability field (remember the position and fill 2048 * later), followed by the elements added below by 2049 * calling ieee80211_add_link_elems(). 2050 */ 2051 capab_pos = skb_put(skb, 2); 2052 2053 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2054 ext_capa, 2055 extra_elems, 2056 extra_elems_len, 2057 link_id, NULL, 2058 link_present_elems, 2059 assoc_data); 2060 if (extra_elems) 2061 skb_put_data(skb, extra_elems + extra_used, 2062 extra_elems_len - extra_used); 2063 2064 put_unaligned_le16(capab, capab_pos); 2065 2066 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2067 link_present_elems); 2068 2069 ieee80211_fragment_element(skb, subelem_len, 2070 IEEE80211_MLE_SUBELEM_FRAGMENT); 2071 } 2072 2073 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2074 } 2075 2076 static int 2077 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2078 enum nl80211_iftype iftype, 2079 struct cfg80211_bss *cbss, 2080 size_t elems_len) 2081 { 2082 struct ieee80211_local *local = sdata->local; 2083 const struct ieee80211_sband_iftype_data *iftd; 2084 struct ieee80211_supported_band *sband; 2085 size_t size = 0; 2086 2087 if (!cbss) 2088 return size; 2089 2090 sband = local->hw.wiphy->bands[cbss->channel->band]; 2091 2092 /* add STA profile elements length */ 2093 size += elems_len; 2094 2095 /* and supported rates length */ 2096 size += 4 + sband->n_bitrates; 2097 2098 /* supported channels */ 2099 size += 2 + 2 * sband->n_channels; 2100 2101 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2102 if (iftd) 2103 size += iftd->vendor_elems.len; 2104 2105 /* power capability */ 2106 size += 4; 2107 2108 /* HT, VHT, HE, EHT */ 2109 size += 2 + sizeof(struct ieee80211_ht_cap); 2110 size += 2 + sizeof(struct ieee80211_vht_cap); 2111 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2112 sizeof(struct ieee80211_he_mcs_nss_supp) + 2113 IEEE80211_HE_PPE_THRES_MAX_LEN; 2114 2115 if (sband->band == NL80211_BAND_6GHZ) 2116 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2117 2118 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2119 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2120 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2121 2122 return size; 2123 } 2124 2125 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2126 { 2127 struct ieee80211_local *local = sdata->local; 2128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2129 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2130 struct ieee80211_link_data *link; 2131 struct sk_buff *skb; 2132 struct ieee80211_mgmt *mgmt; 2133 u8 *pos, qos_info, *ie_start; 2134 size_t offset, noffset; 2135 u16 capab = 0, link_capab; 2136 __le16 listen_int; 2137 struct element *ext_capa = NULL; 2138 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2139 struct ieee80211_prep_tx_info info = {}; 2140 unsigned int link_id, n_links = 0; 2141 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2142 void *capab_pos; 2143 size_t size; 2144 int ret; 2145 2146 /* we know it's writable, cast away the const */ 2147 if (assoc_data->ie_len) 2148 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2149 assoc_data->ie, 2150 assoc_data->ie_len); 2151 2152 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2153 2154 size = local->hw.extra_tx_headroom + 2155 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2156 2 + assoc_data->ssid_len + /* SSID */ 2157 assoc_data->ie_len + /* extra IEs */ 2158 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2159 9; /* WMM */ 2160 2161 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2162 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2163 size_t elems_len = assoc_data->link[link_id].elems_len; 2164 2165 if (!cbss) 2166 continue; 2167 2168 n_links++; 2169 2170 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2171 elems_len); 2172 2173 /* non-inheritance element */ 2174 size += 2 + 2 + PRESENT_ELEMS_MAX; 2175 2176 /* should be the same across all BSSes */ 2177 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2178 capab |= WLAN_CAPABILITY_PRIVACY; 2179 } 2180 2181 if (ieee80211_vif_is_mld(&sdata->vif)) { 2182 /* consider the multi-link element with STA profile */ 2183 size += sizeof(struct ieee80211_multi_link_elem); 2184 /* max common info field in basic multi-link element */ 2185 size += sizeof(struct ieee80211_mle_basic_common_info) + 2186 2 + /* capa & op */ 2187 2 + /* ext capa & op */ 2188 2; /* EML capa */ 2189 2190 /* 2191 * The capability elements were already considered above; 2192 * note this over-estimates a bit because there's no 2193 * STA profile for the assoc link. 2194 */ 2195 size += (n_links - 1) * 2196 (1 + 1 + /* subelement ID/length */ 2197 2 + /* STA control */ 2198 1 + ETH_ALEN + 2 /* STA Info field */); 2199 } 2200 2201 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2202 if (WARN_ON(!link)) 2203 return -EINVAL; 2204 2205 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2206 return -EINVAL; 2207 2208 skb = alloc_skb(size, GFP_KERNEL); 2209 if (!skb) 2210 return -ENOMEM; 2211 2212 skb_reserve(skb, local->hw.extra_tx_headroom); 2213 2214 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2215 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2216 2217 /* Set MBSSID support for HE AP if needed */ 2218 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2219 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2220 ext_capa && ext_capa->datalen >= 3) 2221 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2222 2223 mgmt = skb_put_zero(skb, 24); 2224 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2225 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2226 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2227 2228 listen_int = cpu_to_le16(assoc_data->s1g ? 2229 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2230 local->hw.conf.listen_interval); 2231 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2232 skb_put(skb, 10); 2233 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2234 IEEE80211_STYPE_REASSOC_REQ); 2235 capab_pos = &mgmt->u.reassoc_req.capab_info; 2236 mgmt->u.reassoc_req.listen_interval = listen_int; 2237 memcpy(mgmt->u.reassoc_req.current_ap, 2238 assoc_data->prev_ap_addr, ETH_ALEN); 2239 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2240 } else { 2241 skb_put(skb, 4); 2242 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2243 IEEE80211_STYPE_ASSOC_REQ); 2244 capab_pos = &mgmt->u.assoc_req.capab_info; 2245 mgmt->u.assoc_req.listen_interval = listen_int; 2246 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2247 } 2248 2249 /* SSID */ 2250 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2251 ie_start = pos; 2252 *pos++ = WLAN_EID_SSID; 2253 *pos++ = assoc_data->ssid_len; 2254 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2255 2256 /* 2257 * This bit is technically reserved, so it shouldn't matter for either 2258 * the AP or us, but it also means we shouldn't set it. However, we've 2259 * always set it in the past, and apparently some EHT APs check that 2260 * we don't set it. To avoid interoperability issues with old APs that 2261 * for some reason check it and want it to be set, set the bit for all 2262 * pre-EHT connections as we used to do. 2263 */ 2264 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2265 !ieee80211_hw_check(&local->hw, STRICT)) 2266 capab |= WLAN_CAPABILITY_ESS; 2267 2268 /* add the elements for the assoc (main) link */ 2269 link_capab = capab; 2270 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2271 ext_capa, 2272 assoc_data->ie, 2273 assoc_data->ie_len, 2274 assoc_data->assoc_link_id, link, 2275 present_elems, assoc_data); 2276 put_unaligned_le16(link_capab, capab_pos); 2277 2278 /* if present, add any custom non-vendor IEs */ 2279 if (assoc_data->ie_len) { 2280 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2281 assoc_data->ie_len, 2282 offset); 2283 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2284 offset = noffset; 2285 } 2286 2287 if (assoc_data->wmm) { 2288 if (assoc_data->uapsd) { 2289 qos_info = ifmgd->uapsd_queues; 2290 qos_info |= (ifmgd->uapsd_max_sp_len << 2291 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2292 } else { 2293 qos_info = 0; 2294 } 2295 2296 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2297 } 2298 2299 /* add any remaining custom (i.e. vendor specific here) IEs */ 2300 if (assoc_data->ie_len) { 2301 noffset = assoc_data->ie_len; 2302 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2303 } 2304 2305 if (assoc_data->fils_kek_len) { 2306 ret = fils_encrypt_assoc_req(skb, assoc_data); 2307 if (ret < 0) { 2308 dev_kfree_skb(skb); 2309 return ret; 2310 } 2311 } 2312 2313 pos = skb_tail_pointer(skb); 2314 kfree(ifmgd->assoc_req_ies); 2315 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2316 if (!ifmgd->assoc_req_ies) { 2317 dev_kfree_skb(skb); 2318 return -ENOMEM; 2319 } 2320 2321 ifmgd->assoc_req_ies_len = pos - ie_start; 2322 2323 info.link_id = assoc_data->assoc_link_id; 2324 drv_mgd_prepare_tx(local, sdata, &info); 2325 2326 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2327 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2328 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2329 IEEE80211_TX_INTFL_MLME_CONN_TX; 2330 ieee80211_tx_skb(sdata, skb); 2331 2332 return 0; 2333 } 2334 2335 void ieee80211_send_pspoll(struct ieee80211_local *local, 2336 struct ieee80211_sub_if_data *sdata) 2337 { 2338 struct ieee80211_pspoll *pspoll; 2339 struct sk_buff *skb; 2340 2341 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2342 if (!skb) 2343 return; 2344 2345 pspoll = (struct ieee80211_pspoll *) skb->data; 2346 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2347 2348 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2349 ieee80211_tx_skb(sdata, skb); 2350 } 2351 2352 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2353 struct ieee80211_sub_if_data *sdata, 2354 bool powersave) 2355 { 2356 struct sk_buff *skb; 2357 struct ieee80211_hdr_3addr *nullfunc; 2358 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2359 2360 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2361 !ieee80211_hw_check(&local->hw, 2362 DOESNT_SUPPORT_QOS_NDP)); 2363 if (!skb) 2364 return; 2365 2366 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2367 if (powersave) 2368 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2369 2370 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2371 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2372 2373 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2374 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2375 2376 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2377 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2378 2379 ieee80211_tx_skb(sdata, skb); 2380 } 2381 2382 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2383 struct ieee80211_sub_if_data *sdata) 2384 { 2385 struct sk_buff *skb; 2386 struct ieee80211_hdr *nullfunc; 2387 __le16 fc; 2388 2389 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2390 return; 2391 2392 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2393 if (!skb) 2394 return; 2395 2396 skb_reserve(skb, local->hw.extra_tx_headroom); 2397 2398 nullfunc = skb_put_zero(skb, 30); 2399 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2400 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2401 nullfunc->frame_control = fc; 2402 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2403 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2404 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2405 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2406 2407 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2408 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2409 ieee80211_tx_skb(sdata, skb); 2410 } 2411 2412 /* spectrum management related things */ 2413 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2414 struct wiphy_work *work) 2415 { 2416 struct ieee80211_link_data *link = 2417 container_of(work, struct ieee80211_link_data, 2418 u.mgd.csa.switch_work.work); 2419 struct ieee80211_sub_if_data *sdata = link->sdata; 2420 struct ieee80211_local *local = sdata->local; 2421 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2422 int ret; 2423 2424 if (!ieee80211_sdata_running(sdata)) 2425 return; 2426 2427 lockdep_assert_wiphy(local->hw.wiphy); 2428 2429 if (!ifmgd->associated) 2430 return; 2431 2432 if (!link->conf->csa_active) 2433 return; 2434 2435 /* 2436 * If the link isn't active (now), we cannot wait for beacons, won't 2437 * have a reserved chanctx, etc. Just switch over the chandef and 2438 * update cfg80211 directly. 2439 */ 2440 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2441 struct link_sta_info *link_sta; 2442 struct sta_info *ap_sta; 2443 2444 link->conf->chanreq = link->csa.chanreq; 2445 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2446 link->link_id); 2447 link->conf->csa_active = false; 2448 2449 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2450 if (WARN_ON(!ap_sta)) 2451 return; 2452 2453 link_sta = wiphy_dereference(wiphy, 2454 ap_sta->link[link->link_id]); 2455 if (WARN_ON(!link_sta)) 2456 return; 2457 2458 link_sta->pub->bandwidth = 2459 _ieee80211_sta_cur_vht_bw(link_sta, 2460 &link->csa.chanreq.oper); 2461 return; 2462 } 2463 2464 /* 2465 * using reservation isn't immediate as it may be deferred until later 2466 * with multi-vif. once reservation is complete it will re-schedule the 2467 * work with no reserved_chanctx so verify chandef to check if it 2468 * completed successfully 2469 */ 2470 2471 if (link->reserved_chanctx) { 2472 /* 2473 * with multi-vif csa driver may call ieee80211_csa_finish() 2474 * many times while waiting for other interfaces to use their 2475 * reservations 2476 */ 2477 if (link->reserved_ready) 2478 return; 2479 2480 ret = ieee80211_link_use_reserved_context(link); 2481 if (ret) { 2482 link_info(link, 2483 "failed to use reserved channel context, disconnecting (err=%d)\n", 2484 ret); 2485 wiphy_work_queue(sdata->local->hw.wiphy, 2486 &ifmgd->csa_connection_drop_work); 2487 } 2488 return; 2489 } 2490 2491 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2492 &link->csa.chanreq)) { 2493 link_info(link, 2494 "failed to finalize channel switch, disconnecting\n"); 2495 wiphy_work_queue(sdata->local->hw.wiphy, 2496 &ifmgd->csa_connection_drop_work); 2497 return; 2498 } 2499 2500 link->u.mgd.csa.waiting_bcn = true; 2501 2502 /* apply new TPE restrictions immediately on the new channel */ 2503 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2504 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2505 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2506 &link->u.mgd.csa.ap_chandef, 2507 &link->conf->chanreq.oper); 2508 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2509 sizeof(link->u.mgd.csa.tpe))) { 2510 link->conf->tpe = link->u.mgd.csa.tpe; 2511 ieee80211_link_info_change_notify(sdata, link, 2512 BSS_CHANGED_TPE); 2513 } 2514 } 2515 2516 /* 2517 * It is not necessary to reset these timers if any link does not 2518 * have an active CSA and that link still receives the beacons 2519 * when other links have active CSA. 2520 */ 2521 for_each_link_data(sdata, link) { 2522 if (!link->conf->csa_active) 2523 return; 2524 } 2525 2526 /* 2527 * Reset the beacon monitor and connection monitor timers when CSA 2528 * is active for all links in MLO when channel switch occurs in all 2529 * the links. 2530 */ 2531 ieee80211_sta_reset_beacon_monitor(sdata); 2532 ieee80211_sta_reset_conn_monitor(sdata); 2533 } 2534 2535 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2536 { 2537 struct ieee80211_sub_if_data *sdata = link->sdata; 2538 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2539 int ret; 2540 2541 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2542 2543 WARN_ON(!link->conf->csa_active); 2544 2545 ieee80211_vif_unblock_queues_csa(sdata); 2546 2547 link->conf->csa_active = false; 2548 link->u.mgd.csa.blocked_tx = false; 2549 link->u.mgd.csa.waiting_bcn = false; 2550 2551 ret = drv_post_channel_switch(link); 2552 if (ret) { 2553 link_info(link, 2554 "driver post channel switch failed, disconnecting\n"); 2555 wiphy_work_queue(sdata->local->hw.wiphy, 2556 &ifmgd->csa_connection_drop_work); 2557 return; 2558 } 2559 2560 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2561 link->link_id); 2562 } 2563 2564 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2565 unsigned int link_id) 2566 { 2567 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2568 2569 trace_api_chswitch_done(sdata, success, link_id); 2570 2571 rcu_read_lock(); 2572 2573 if (!success) { 2574 sdata_info(sdata, 2575 "driver channel switch failed (link %d), disconnecting\n", 2576 link_id); 2577 wiphy_work_queue(sdata->local->hw.wiphy, 2578 &sdata->u.mgd.csa_connection_drop_work); 2579 } else { 2580 struct ieee80211_link_data *link = 2581 rcu_dereference(sdata->link[link_id]); 2582 2583 if (WARN_ON(!link)) { 2584 rcu_read_unlock(); 2585 return; 2586 } 2587 2588 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2589 &link->u.mgd.csa.switch_work, 0); 2590 } 2591 2592 rcu_read_unlock(); 2593 } 2594 EXPORT_SYMBOL(ieee80211_chswitch_done); 2595 2596 static void 2597 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2598 { 2599 struct ieee80211_sub_if_data *sdata = link->sdata; 2600 struct ieee80211_local *local = sdata->local; 2601 2602 lockdep_assert_wiphy(local->hw.wiphy); 2603 2604 if (!local->ops->abort_channel_switch) 2605 return; 2606 2607 if (rcu_access_pointer(link->conf->chanctx_conf)) 2608 ieee80211_link_unreserve_chanctx(link); 2609 2610 ieee80211_vif_unblock_queues_csa(sdata); 2611 2612 link->conf->csa_active = false; 2613 link->u.mgd.csa.blocked_tx = false; 2614 2615 drv_abort_channel_switch(link); 2616 } 2617 2618 struct sta_csa_rnr_iter_data { 2619 struct ieee80211_link_data *link; 2620 struct ieee80211_channel *chan; 2621 u8 mld_id; 2622 }; 2623 2624 static enum cfg80211_rnr_iter_ret 2625 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2626 const struct ieee80211_neighbor_ap_info *info, 2627 const u8 *tbtt_info, u8 tbtt_info_len) 2628 { 2629 struct sta_csa_rnr_iter_data *data = _data; 2630 struct ieee80211_link_data *link = data->link; 2631 struct ieee80211_sub_if_data *sdata = link->sdata; 2632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2633 const struct ieee80211_tbtt_info_ge_11 *ti; 2634 enum nl80211_band band; 2635 unsigned int center_freq; 2636 int link_id; 2637 2638 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2639 return RNR_ITER_CONTINUE; 2640 2641 if (tbtt_info_len < sizeof(*ti)) 2642 return RNR_ITER_CONTINUE; 2643 2644 ti = (const void *)tbtt_info; 2645 2646 if (ti->mld_params.mld_id != data->mld_id) 2647 return RNR_ITER_CONTINUE; 2648 2649 link_id = le16_get_bits(ti->mld_params.params, 2650 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2651 if (link_id != data->link->link_id) 2652 return RNR_ITER_CONTINUE; 2653 2654 /* we found the entry for our link! */ 2655 2656 /* this AP is confused, it had this right before ... just disconnect */ 2657 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2658 link_info(link, 2659 "AP now has invalid operating class in RNR, disconnect\n"); 2660 wiphy_work_queue(sdata->local->hw.wiphy, 2661 &ifmgd->csa_connection_drop_work); 2662 return RNR_ITER_BREAK; 2663 } 2664 2665 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2666 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2667 2668 return RNR_ITER_BREAK; 2669 } 2670 2671 static void 2672 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2673 struct ieee802_11_elems *elems) 2674 { 2675 struct ieee80211_sub_if_data *sdata = link->sdata; 2676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2677 struct sta_csa_rnr_iter_data data = { 2678 .link = link, 2679 }; 2680 2681 /* 2682 * If we get here, we see a beacon from another link without 2683 * CSA still being reported for it, so now we have to check 2684 * if the CSA was aborted or completed. This may not even be 2685 * perfectly possible if the CSA was only done for changing 2686 * the puncturing, but in that case if the link in inactive 2687 * we don't really care, and if it's an active link (or when 2688 * it's activated later) we'll get a beacon and adjust. 2689 */ 2690 2691 if (WARN_ON(!elems->ml_basic)) 2692 return; 2693 2694 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2695 2696 /* 2697 * So in order to do this, iterate the RNR element(s) and see 2698 * what channel is reported now. 2699 */ 2700 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2701 ieee80211_sta_csa_rnr_iter, &data); 2702 2703 if (!data.chan) { 2704 link_info(link, 2705 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2706 wiphy_work_queue(sdata->local->hw.wiphy, 2707 &ifmgd->csa_connection_drop_work); 2708 return; 2709 } 2710 2711 /* 2712 * If it doesn't match the CSA, then assume it aborted. This 2713 * may erroneously detect that it was _not_ aborted when it 2714 * was in fact aborted, but only changed the bandwidth or the 2715 * puncturing configuration, but we don't have enough data to 2716 * detect that. 2717 */ 2718 if (data.chan != link->csa.chanreq.oper.chan) 2719 ieee80211_sta_abort_chanswitch(link); 2720 } 2721 2722 enum ieee80211_csa_source { 2723 IEEE80211_CSA_SOURCE_BEACON, 2724 IEEE80211_CSA_SOURCE_OTHER_LINK, 2725 IEEE80211_CSA_SOURCE_PROT_ACTION, 2726 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2727 }; 2728 2729 static void 2730 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2731 u64 timestamp, u32 device_timestamp, 2732 struct ieee802_11_elems *full_elems, 2733 struct ieee802_11_elems *csa_elems, 2734 enum ieee80211_csa_source source) 2735 { 2736 struct ieee80211_sub_if_data *sdata = link->sdata; 2737 struct ieee80211_local *local = sdata->local; 2738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2739 struct ieee80211_chanctx *chanctx = NULL; 2740 struct ieee80211_chanctx_conf *conf; 2741 struct ieee80211_csa_ie csa_ie = {}; 2742 struct ieee80211_channel_switch ch_switch = { 2743 .link_id = link->link_id, 2744 .timestamp = timestamp, 2745 .device_timestamp = device_timestamp, 2746 }; 2747 unsigned long now; 2748 int res; 2749 2750 lockdep_assert_wiphy(local->hw.wiphy); 2751 2752 if (csa_elems) { 2753 struct cfg80211_bss *cbss = link->conf->bss; 2754 enum nl80211_band current_band; 2755 struct ieee80211_bss *bss; 2756 2757 if (WARN_ON(!cbss)) 2758 return; 2759 2760 current_band = cbss->channel->band; 2761 bss = (void *)cbss->priv; 2762 2763 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2764 current_band, 2765 bss->vht_cap_info, 2766 &link->u.mgd.conn, 2767 link->u.mgd.bssid, 2768 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2769 &csa_ie); 2770 if (res == 0) { 2771 ch_switch.block_tx = csa_ie.mode; 2772 ch_switch.chandef = csa_ie.chanreq.oper; 2773 ch_switch.count = csa_ie.count; 2774 ch_switch.delay = csa_ie.max_switch_time; 2775 } 2776 2777 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2778 } else { 2779 /* 2780 * If there was no per-STA profile for this link, we 2781 * get called with csa_elems == NULL. This of course means 2782 * there are no CSA elements, so set res=1 indicating 2783 * no more CSA. 2784 */ 2785 res = 1; 2786 } 2787 2788 if (res < 0) { 2789 /* ignore this case, not a protected frame */ 2790 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2791 return; 2792 goto drop_connection; 2793 } 2794 2795 if (link->conf->csa_active) { 2796 switch (source) { 2797 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2798 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2799 /* already processing - disregard action frames */ 2800 return; 2801 case IEEE80211_CSA_SOURCE_BEACON: 2802 if (link->u.mgd.csa.waiting_bcn) { 2803 ieee80211_chswitch_post_beacon(link); 2804 /* 2805 * If the CSA is still present after the switch 2806 * we need to consider it as a new CSA (possibly 2807 * to self). This happens by not returning here 2808 * so we'll get to the check below. 2809 */ 2810 } else if (res) { 2811 ieee80211_sta_abort_chanswitch(link); 2812 return; 2813 } else { 2814 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2815 return; 2816 } 2817 break; 2818 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2819 /* active link: we want to see the beacon to continue */ 2820 if (ieee80211_vif_link_active(&sdata->vif, 2821 link->link_id)) 2822 return; 2823 2824 /* switch work ran, so just complete the process */ 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 break; 2834 } 2835 2836 /* link still has CSA but we already know, do nothing */ 2837 if (!res) 2838 return; 2839 2840 /* check in the RNR if the CSA aborted */ 2841 ieee80211_sta_other_link_csa_disappeared(link, 2842 full_elems); 2843 return; 2844 } 2845 } 2846 2847 /* no active CSA nor a new one */ 2848 if (res) { 2849 /* 2850 * However, we may have stopped queues when receiving a public 2851 * action frame that couldn't be protected, if it had the quiet 2852 * bit set. This is a trade-off, we want to be quiet as soon as 2853 * possible, but also don't trust the public action frame much, 2854 * as it can't be protected. 2855 */ 2856 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2857 link->u.mgd.csa.blocked_tx = false; 2858 ieee80211_vif_unblock_queues_csa(sdata); 2859 } 2860 return; 2861 } 2862 2863 /* 2864 * We don't really trust public action frames, but block queues (go to 2865 * quiet mode) for them anyway, we should get a beacon soon to either 2866 * know what the CSA really is, or figure out the public action frame 2867 * was actually an attack. 2868 */ 2869 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2870 if (csa_ie.mode) { 2871 link->u.mgd.csa.blocked_tx = true; 2872 ieee80211_vif_block_queues_csa(sdata); 2873 } 2874 return; 2875 } 2876 2877 if (link->conf->chanreq.oper.chan->band != 2878 csa_ie.chanreq.oper.chan->band) { 2879 link_info(link, 2880 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2881 link->u.mgd.bssid, 2882 csa_ie.chanreq.oper.chan->center_freq, 2883 csa_ie.chanreq.oper.width, 2884 csa_ie.chanreq.oper.center_freq1, 2885 csa_ie.chanreq.oper.center_freq2); 2886 goto drop_connection; 2887 } 2888 2889 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2890 IEEE80211_CHAN_DISABLED)) { 2891 link_info(link, 2892 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2893 link->u.mgd.bssid, 2894 csa_ie.chanreq.oper.chan->center_freq, 2895 csa_ie.chanreq.oper.chan->freq_offset, 2896 csa_ie.chanreq.oper.width, 2897 csa_ie.chanreq.oper.center_freq1, 2898 csa_ie.chanreq.oper.freq1_offset, 2899 csa_ie.chanreq.oper.center_freq2); 2900 goto drop_connection; 2901 } 2902 2903 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2904 &link->conf->chanreq.oper) && 2905 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2906 if (link->u.mgd.csa.ignored_same_chan) 2907 return; 2908 link_info(link, 2909 "AP %pM tries to chanswitch to same channel, ignore\n", 2910 link->u.mgd.bssid); 2911 link->u.mgd.csa.ignored_same_chan = true; 2912 return; 2913 } 2914 2915 /* 2916 * Drop all TDLS peers on the affected link - either we disconnect or 2917 * move to a different channel from this point on. There's no telling 2918 * what our peer will do. 2919 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2920 * have an incompatible wider chandef. 2921 */ 2922 ieee80211_teardown_tdls_peers(link); 2923 2924 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2925 lockdep_is_held(&local->hw.wiphy->mtx)); 2926 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2927 link_info(link, 2928 "no channel context assigned to vif?, disconnecting\n"); 2929 goto drop_connection; 2930 } 2931 2932 if (conf) 2933 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2934 2935 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2936 link_info(link, 2937 "driver doesn't support chan-switch with channel contexts\n"); 2938 goto drop_connection; 2939 } 2940 2941 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2942 link_info(link, 2943 "preparing for channel switch failed, disconnecting\n"); 2944 goto drop_connection; 2945 } 2946 2947 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2948 2949 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2950 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2951 &csa_ie.chanreq.ap); 2952 2953 if (chanctx) { 2954 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2955 chanctx->mode, false); 2956 if (res) { 2957 link_info(link, 2958 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2959 res); 2960 goto drop_connection; 2961 } 2962 } 2963 2964 link->conf->csa_active = true; 2965 link->u.mgd.csa.ignored_same_chan = false; 2966 link->u.mgd.beacon_crc_valid = false; 2967 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2968 2969 if (csa_ie.mode) 2970 ieee80211_vif_block_queues_csa(sdata); 2971 2972 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2973 link->link_id, csa_ie.count, 2974 csa_ie.mode); 2975 2976 /* we may have to handle timeout for deactivated link in software */ 2977 now = jiffies; 2978 link->u.mgd.csa.time = now + 2979 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2980 link->conf->beacon_int); 2981 2982 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2983 local->ops->channel_switch) { 2984 /* 2985 * Use driver's channel switch callback, the driver will 2986 * later call ieee80211_chswitch_done(). It may deactivate 2987 * the link as well, we handle that elsewhere and queue 2988 * the csa.switch_work for the calculated time then. 2989 */ 2990 drv_channel_switch(local, sdata, &ch_switch); 2991 return; 2992 } 2993 2994 /* channel switch handled in software */ 2995 wiphy_delayed_work_queue(local->hw.wiphy, 2996 &link->u.mgd.csa.switch_work, 2997 link->u.mgd.csa.time - now); 2998 return; 2999 drop_connection: 3000 /* 3001 * This is just so that the disconnect flow will know that 3002 * we were trying to switch channel and failed. In case the 3003 * mode is 1 (we are not allowed to Tx), we will know not to 3004 * send a deauthentication frame. Those two fields will be 3005 * reset when the disconnection worker runs. 3006 */ 3007 link->conf->csa_active = true; 3008 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3009 3010 wiphy_work_queue(sdata->local->hw.wiphy, 3011 &ifmgd->csa_connection_drop_work); 3012 } 3013 3014 struct sta_bss_param_ch_cnt_data { 3015 struct ieee80211_sub_if_data *sdata; 3016 u8 reporting_link_id; 3017 u8 mld_id; 3018 }; 3019 3020 static enum cfg80211_rnr_iter_ret 3021 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3022 const struct ieee80211_neighbor_ap_info *info, 3023 const u8 *tbtt_info, u8 tbtt_info_len) 3024 { 3025 struct sta_bss_param_ch_cnt_data *data = _data; 3026 struct ieee80211_sub_if_data *sdata = data->sdata; 3027 const struct ieee80211_tbtt_info_ge_11 *ti; 3028 u8 bss_param_ch_cnt; 3029 int link_id; 3030 3031 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3032 return RNR_ITER_CONTINUE; 3033 3034 if (tbtt_info_len < sizeof(*ti)) 3035 return RNR_ITER_CONTINUE; 3036 3037 ti = (const void *)tbtt_info; 3038 3039 if (ti->mld_params.mld_id != data->mld_id) 3040 return RNR_ITER_CONTINUE; 3041 3042 link_id = le16_get_bits(ti->mld_params.params, 3043 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3044 bss_param_ch_cnt = 3045 le16_get_bits(ti->mld_params.params, 3046 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3047 3048 if (bss_param_ch_cnt != 255 && 3049 link_id < ARRAY_SIZE(sdata->link)) { 3050 struct ieee80211_link_data *link = 3051 sdata_dereference(sdata->link[link_id], sdata); 3052 3053 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3054 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3055 link->conf->bss_param_ch_cnt_link_id = 3056 data->reporting_link_id; 3057 } 3058 } 3059 3060 return RNR_ITER_CONTINUE; 3061 } 3062 3063 static void 3064 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3065 struct ieee80211_bss_conf *bss_conf, 3066 struct ieee802_11_elems *elems) 3067 { 3068 struct sta_bss_param_ch_cnt_data data = { 3069 .reporting_link_id = bss_conf->link_id, 3070 .sdata = sdata, 3071 }; 3072 int bss_param_ch_cnt; 3073 3074 if (!elems->ml_basic) 3075 return; 3076 3077 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3078 3079 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3080 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3081 3082 bss_param_ch_cnt = 3083 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3084 3085 /* 3086 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3087 * didn't change to indicate that we got a beacon on our own 3088 * link. 3089 */ 3090 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3091 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3092 bss_conf->bss_param_ch_cnt_link_id = 3093 bss_conf->link_id; 3094 } 3095 } 3096 3097 static bool 3098 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3099 const u8 *country_ie, u8 country_ie_len, 3100 const u8 *pwr_constr_elem, 3101 int *chan_pwr, int *pwr_reduction) 3102 { 3103 struct ieee80211_country_ie_triplet *triplet; 3104 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3105 int i, chan_increment; 3106 bool have_chan_pwr = false; 3107 3108 /* Invalid IE */ 3109 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3110 return false; 3111 3112 triplet = (void *)(country_ie + 3); 3113 country_ie_len -= 3; 3114 3115 switch (channel->band) { 3116 default: 3117 WARN_ON_ONCE(1); 3118 fallthrough; 3119 case NL80211_BAND_2GHZ: 3120 case NL80211_BAND_60GHZ: 3121 case NL80211_BAND_LC: 3122 chan_increment = 1; 3123 break; 3124 case NL80211_BAND_5GHZ: 3125 chan_increment = 4; 3126 break; 3127 case NL80211_BAND_6GHZ: 3128 /* 3129 * In the 6 GHz band, the "maximum transmit power level" 3130 * field in the triplets is reserved, and thus will be 3131 * zero and we shouldn't use it to control TX power. 3132 * The actual TX power will be given in the transmit 3133 * power envelope element instead. 3134 */ 3135 return false; 3136 } 3137 3138 /* find channel */ 3139 while (country_ie_len >= 3) { 3140 u8 first_channel = triplet->chans.first_channel; 3141 3142 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3143 goto next; 3144 3145 for (i = 0; i < triplet->chans.num_channels; i++) { 3146 if (first_channel + i * chan_increment == chan) { 3147 have_chan_pwr = true; 3148 *chan_pwr = triplet->chans.max_power; 3149 break; 3150 } 3151 } 3152 if (have_chan_pwr) 3153 break; 3154 3155 next: 3156 triplet++; 3157 country_ie_len -= 3; 3158 } 3159 3160 if (have_chan_pwr && pwr_constr_elem) 3161 *pwr_reduction = *pwr_constr_elem; 3162 else 3163 *pwr_reduction = 0; 3164 3165 return have_chan_pwr; 3166 } 3167 3168 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3169 const u8 *cisco_dtpc_ie, 3170 int *pwr_level) 3171 { 3172 /* From practical testing, the first data byte of the DTPC element 3173 * seems to contain the requested dBm level, and the CLI on Cisco 3174 * APs clearly state the range is -127 to 127 dBm, which indicates 3175 * a signed byte, although it seemingly never actually goes negative. 3176 * The other byte seems to always be zero. 3177 */ 3178 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3179 } 3180 3181 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3182 struct ieee80211_channel *channel, 3183 struct ieee80211_mgmt *mgmt, 3184 const u8 *country_ie, u8 country_ie_len, 3185 const u8 *pwr_constr_ie, 3186 const u8 *cisco_dtpc_ie) 3187 { 3188 struct ieee80211_sub_if_data *sdata = link->sdata; 3189 bool has_80211h_pwr = false, has_cisco_pwr = false; 3190 int chan_pwr = 0, pwr_reduction_80211h = 0; 3191 int pwr_level_cisco, pwr_level_80211h; 3192 int new_ap_level; 3193 __le16 capab = mgmt->u.probe_resp.capab_info; 3194 3195 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3196 return 0; /* TODO */ 3197 3198 if (country_ie && 3199 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3200 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3201 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3202 channel, country_ie, country_ie_len, 3203 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3204 pwr_level_80211h = 3205 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3206 } 3207 3208 if (cisco_dtpc_ie) { 3209 ieee80211_find_cisco_dtpc( 3210 channel, cisco_dtpc_ie, &pwr_level_cisco); 3211 has_cisco_pwr = true; 3212 } 3213 3214 if (!has_80211h_pwr && !has_cisco_pwr) 3215 return 0; 3216 3217 /* If we have both 802.11h and Cisco DTPC, apply both limits 3218 * by picking the smallest of the two power levels advertised. 3219 */ 3220 if (has_80211h_pwr && 3221 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3222 new_ap_level = pwr_level_80211h; 3223 3224 if (link->ap_power_level == new_ap_level) 3225 return 0; 3226 3227 sdata_dbg(sdata, 3228 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3229 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3230 link->u.mgd.bssid); 3231 } else { /* has_cisco_pwr is always true here. */ 3232 new_ap_level = pwr_level_cisco; 3233 3234 if (link->ap_power_level == new_ap_level) 3235 return 0; 3236 3237 sdata_dbg(sdata, 3238 "Limiting TX power to %d dBm as advertised by %pM\n", 3239 pwr_level_cisco, link->u.mgd.bssid); 3240 } 3241 3242 link->ap_power_level = new_ap_level; 3243 if (__ieee80211_recalc_txpower(link)) 3244 return BSS_CHANGED_TXPOWER; 3245 return 0; 3246 } 3247 3248 /* powersave */ 3249 static void ieee80211_enable_ps(struct ieee80211_local *local, 3250 struct ieee80211_sub_if_data *sdata) 3251 { 3252 struct ieee80211_conf *conf = &local->hw.conf; 3253 3254 /* 3255 * If we are scanning right now then the parameters will 3256 * take effect when scan finishes. 3257 */ 3258 if (local->scanning) 3259 return; 3260 3261 if (conf->dynamic_ps_timeout > 0 && 3262 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3263 mod_timer(&local->dynamic_ps_timer, jiffies + 3264 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3265 } else { 3266 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3267 ieee80211_send_nullfunc(local, sdata, true); 3268 3269 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3270 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3271 return; 3272 3273 conf->flags |= IEEE80211_CONF_PS; 3274 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3275 } 3276 } 3277 3278 static void ieee80211_change_ps(struct ieee80211_local *local) 3279 { 3280 struct ieee80211_conf *conf = &local->hw.conf; 3281 3282 if (local->ps_sdata) { 3283 ieee80211_enable_ps(local, local->ps_sdata); 3284 } else if (conf->flags & IEEE80211_CONF_PS) { 3285 conf->flags &= ~IEEE80211_CONF_PS; 3286 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3287 timer_delete_sync(&local->dynamic_ps_timer); 3288 wiphy_work_cancel(local->hw.wiphy, 3289 &local->dynamic_ps_enable_work); 3290 } 3291 } 3292 3293 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3294 { 3295 struct ieee80211_local *local = sdata->local; 3296 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3297 struct sta_info *sta = NULL; 3298 bool authorized = false; 3299 3300 if (!mgd->powersave) 3301 return false; 3302 3303 if (mgd->broken_ap) 3304 return false; 3305 3306 if (!mgd->associated) 3307 return false; 3308 3309 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3310 return false; 3311 3312 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3313 !sdata->deflink.u.mgd.have_beacon) 3314 return false; 3315 3316 rcu_read_lock(); 3317 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3318 if (sta) 3319 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3320 rcu_read_unlock(); 3321 3322 return authorized; 3323 } 3324 3325 /* need to hold RTNL or interface lock */ 3326 void ieee80211_recalc_ps(struct ieee80211_local *local) 3327 { 3328 struct ieee80211_sub_if_data *sdata, *found = NULL; 3329 int count = 0; 3330 int timeout; 3331 3332 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3333 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3334 local->ps_sdata = NULL; 3335 return; 3336 } 3337 3338 list_for_each_entry(sdata, &local->interfaces, list) { 3339 if (!ieee80211_sdata_running(sdata)) 3340 continue; 3341 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3342 /* If an AP vif is found, then disable PS 3343 * by setting the count to zero thereby setting 3344 * ps_sdata to NULL. 3345 */ 3346 count = 0; 3347 break; 3348 } 3349 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3350 continue; 3351 found = sdata; 3352 count++; 3353 } 3354 3355 if (count == 1 && ieee80211_powersave_allowed(found)) { 3356 u8 dtimper = found->deflink.u.mgd.dtim_period; 3357 3358 timeout = local->dynamic_ps_forced_timeout; 3359 if (timeout < 0) 3360 timeout = 100; 3361 local->hw.conf.dynamic_ps_timeout = timeout; 3362 3363 /* If the TIM IE is invalid, pretend the value is 1 */ 3364 if (!dtimper) 3365 dtimper = 1; 3366 3367 local->hw.conf.ps_dtim_period = dtimper; 3368 local->ps_sdata = found; 3369 } else { 3370 local->ps_sdata = NULL; 3371 } 3372 3373 ieee80211_change_ps(local); 3374 } 3375 3376 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3377 { 3378 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3379 3380 if (sdata->vif.cfg.ps != ps_allowed) { 3381 sdata->vif.cfg.ps = ps_allowed; 3382 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3383 } 3384 } 3385 3386 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3387 struct wiphy_work *work) 3388 { 3389 struct ieee80211_local *local = 3390 container_of(work, struct ieee80211_local, 3391 dynamic_ps_disable_work); 3392 3393 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3394 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3395 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3396 } 3397 3398 ieee80211_wake_queues_by_reason(&local->hw, 3399 IEEE80211_MAX_QUEUE_MAP, 3400 IEEE80211_QUEUE_STOP_REASON_PS, 3401 false); 3402 } 3403 3404 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3405 struct wiphy_work *work) 3406 { 3407 struct ieee80211_local *local = 3408 container_of(work, struct ieee80211_local, 3409 dynamic_ps_enable_work); 3410 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3411 struct ieee80211_if_managed *ifmgd; 3412 unsigned long flags; 3413 int q; 3414 3415 /* can only happen when PS was just disabled anyway */ 3416 if (!sdata) 3417 return; 3418 3419 ifmgd = &sdata->u.mgd; 3420 3421 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3422 return; 3423 3424 if (local->hw.conf.dynamic_ps_timeout > 0) { 3425 /* don't enter PS if TX frames are pending */ 3426 if (drv_tx_frames_pending(local)) { 3427 mod_timer(&local->dynamic_ps_timer, jiffies + 3428 msecs_to_jiffies( 3429 local->hw.conf.dynamic_ps_timeout)); 3430 return; 3431 } 3432 3433 /* 3434 * transmission can be stopped by others which leads to 3435 * dynamic_ps_timer expiry. Postpone the ps timer if it 3436 * is not the actual idle state. 3437 */ 3438 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3439 for (q = 0; q < local->hw.queues; q++) { 3440 if (local->queue_stop_reasons[q]) { 3441 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3442 flags); 3443 mod_timer(&local->dynamic_ps_timer, jiffies + 3444 msecs_to_jiffies( 3445 local->hw.conf.dynamic_ps_timeout)); 3446 return; 3447 } 3448 } 3449 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3450 } 3451 3452 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3453 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3454 if (drv_tx_frames_pending(local)) { 3455 mod_timer(&local->dynamic_ps_timer, jiffies + 3456 msecs_to_jiffies( 3457 local->hw.conf.dynamic_ps_timeout)); 3458 } else { 3459 ieee80211_send_nullfunc(local, sdata, true); 3460 /* Flush to get the tx status of nullfunc frame */ 3461 ieee80211_flush_queues(local, sdata, false); 3462 } 3463 } 3464 3465 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3466 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3467 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3468 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3469 local->hw.conf.flags |= IEEE80211_CONF_PS; 3470 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3471 } 3472 } 3473 3474 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3475 { 3476 struct ieee80211_local *local = timer_container_of(local, t, 3477 dynamic_ps_timer); 3478 3479 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3480 } 3481 3482 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3483 { 3484 struct ieee80211_link_data *link = 3485 container_of(work, struct ieee80211_link_data, 3486 dfs_cac_timer_work.work); 3487 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3488 struct ieee80211_sub_if_data *sdata = link->sdata; 3489 3490 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3491 3492 if (sdata->wdev.links[link->link_id].cac_started) { 3493 ieee80211_link_release_channel(link); 3494 cfg80211_cac_event(sdata->dev, &chandef, 3495 NL80211_RADAR_CAC_FINISHED, 3496 GFP_KERNEL, link->link_id); 3497 } 3498 } 3499 3500 static bool 3501 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3502 { 3503 struct ieee80211_local *local = sdata->local; 3504 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3505 bool ret = false; 3506 int ac; 3507 3508 if (local->hw.queues < IEEE80211_NUM_ACS) 3509 return false; 3510 3511 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3512 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3513 int non_acm_ac; 3514 unsigned long now = jiffies; 3515 3516 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3517 tx_tspec->admitted_time && 3518 time_after(now, tx_tspec->time_slice_start + HZ)) { 3519 tx_tspec->consumed_tx_time = 0; 3520 tx_tspec->time_slice_start = now; 3521 3522 if (tx_tspec->downgraded) 3523 tx_tspec->action = 3524 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3525 } 3526 3527 switch (tx_tspec->action) { 3528 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3529 /* take the original parameters */ 3530 if (drv_conf_tx(local, &sdata->deflink, ac, 3531 &sdata->deflink.tx_conf[ac])) 3532 link_err(&sdata->deflink, 3533 "failed to set TX queue parameters for queue %d\n", 3534 ac); 3535 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3536 tx_tspec->downgraded = false; 3537 ret = true; 3538 break; 3539 case TX_TSPEC_ACTION_DOWNGRADE: 3540 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3541 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3542 ret = true; 3543 break; 3544 } 3545 /* downgrade next lower non-ACM AC */ 3546 for (non_acm_ac = ac + 1; 3547 non_acm_ac < IEEE80211_NUM_ACS; 3548 non_acm_ac++) 3549 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3550 break; 3551 /* Usually the loop will result in using BK even if it 3552 * requires admission control, but such a configuration 3553 * makes no sense and we have to transmit somehow - the 3554 * AC selection does the same thing. 3555 * If we started out trying to downgrade from BK, then 3556 * the extra condition here might be needed. 3557 */ 3558 if (non_acm_ac >= IEEE80211_NUM_ACS) 3559 non_acm_ac = IEEE80211_AC_BK; 3560 if (drv_conf_tx(local, &sdata->deflink, ac, 3561 &sdata->deflink.tx_conf[non_acm_ac])) 3562 link_err(&sdata->deflink, 3563 "failed to set TX queue parameters for queue %d\n", 3564 ac); 3565 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3566 ret = true; 3567 wiphy_delayed_work_queue(local->hw.wiphy, 3568 &ifmgd->tx_tspec_wk, 3569 tx_tspec->time_slice_start + 3570 HZ - now + 1); 3571 break; 3572 case TX_TSPEC_ACTION_NONE: 3573 /* nothing now */ 3574 break; 3575 } 3576 } 3577 3578 return ret; 3579 } 3580 3581 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3582 { 3583 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3584 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3585 BSS_CHANGED_QOS); 3586 } 3587 3588 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3589 struct wiphy_work *work) 3590 { 3591 struct ieee80211_sub_if_data *sdata; 3592 3593 sdata = container_of(work, struct ieee80211_sub_if_data, 3594 u.mgd.tx_tspec_wk.work); 3595 ieee80211_sta_handle_tspec_ac_params(sdata); 3596 } 3597 3598 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3599 { 3600 struct ieee80211_sub_if_data *sdata = link->sdata; 3601 struct ieee80211_local *local = sdata->local; 3602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3603 struct ieee80211_tx_queue_params *params = link->tx_conf; 3604 u8 ac; 3605 3606 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3607 mlme_dbg(sdata, 3608 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3609 ac, params[ac].acm, 3610 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3611 params[ac].txop, params[ac].uapsd, 3612 ifmgd->tx_tspec[ac].downgraded); 3613 if (!ifmgd->tx_tspec[ac].downgraded && 3614 drv_conf_tx(local, link, ac, ¶ms[ac])) 3615 link_err(link, 3616 "failed to set TX queue parameters for AC %d\n", 3617 ac); 3618 } 3619 } 3620 3621 /* MLME */ 3622 static bool 3623 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3624 struct ieee80211_link_data *link, 3625 const u8 *wmm_param, size_t wmm_param_len, 3626 const struct ieee80211_mu_edca_param_set *mu_edca) 3627 { 3628 struct ieee80211_sub_if_data *sdata = link->sdata; 3629 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3630 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3631 size_t left; 3632 int count, mu_edca_count, ac; 3633 const u8 *pos; 3634 u8 uapsd_queues = 0; 3635 3636 if (!local->ops->conf_tx) 3637 return false; 3638 3639 if (local->hw.queues < IEEE80211_NUM_ACS) 3640 return false; 3641 3642 if (!wmm_param) 3643 return false; 3644 3645 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3646 return false; 3647 3648 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3649 uapsd_queues = ifmgd->uapsd_queues; 3650 3651 count = wmm_param[6] & 0x0f; 3652 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3653 * if mu_edca was preset before and now it disappeared tell 3654 * the driver about it. 3655 */ 3656 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3657 if (count == link->u.mgd.wmm_last_param_set && 3658 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3659 return false; 3660 link->u.mgd.wmm_last_param_set = count; 3661 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3662 3663 pos = wmm_param + 8; 3664 left = wmm_param_len - 8; 3665 3666 memset(¶ms, 0, sizeof(params)); 3667 3668 sdata->wmm_acm = 0; 3669 for (; left >= 4; left -= 4, pos += 4) { 3670 int aci = (pos[0] >> 5) & 0x03; 3671 int acm = (pos[0] >> 4) & 0x01; 3672 bool uapsd = false; 3673 3674 switch (aci) { 3675 case 1: /* AC_BK */ 3676 ac = IEEE80211_AC_BK; 3677 if (acm) 3678 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3679 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3680 uapsd = true; 3681 params[ac].mu_edca = !!mu_edca; 3682 if (mu_edca) 3683 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3684 break; 3685 case 2: /* AC_VI */ 3686 ac = IEEE80211_AC_VI; 3687 if (acm) 3688 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3689 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3690 uapsd = true; 3691 params[ac].mu_edca = !!mu_edca; 3692 if (mu_edca) 3693 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3694 break; 3695 case 3: /* AC_VO */ 3696 ac = IEEE80211_AC_VO; 3697 if (acm) 3698 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3699 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3700 uapsd = true; 3701 params[ac].mu_edca = !!mu_edca; 3702 if (mu_edca) 3703 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3704 break; 3705 case 0: /* AC_BE */ 3706 default: 3707 ac = IEEE80211_AC_BE; 3708 if (acm) 3709 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3710 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3711 uapsd = true; 3712 params[ac].mu_edca = !!mu_edca; 3713 if (mu_edca) 3714 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3715 break; 3716 } 3717 3718 params[ac].aifs = pos[0] & 0x0f; 3719 3720 if (params[ac].aifs < 2) { 3721 link_info(link, 3722 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3723 params[ac].aifs, aci); 3724 params[ac].aifs = 2; 3725 } 3726 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3727 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3728 params[ac].txop = get_unaligned_le16(pos + 2); 3729 params[ac].acm = acm; 3730 params[ac].uapsd = uapsd; 3731 3732 if (params[ac].cw_min == 0 || 3733 params[ac].cw_min > params[ac].cw_max) { 3734 link_info(link, 3735 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3736 params[ac].cw_min, params[ac].cw_max, aci); 3737 return false; 3738 } 3739 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3740 } 3741 3742 /* WMM specification requires all 4 ACIs. */ 3743 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3744 if (params[ac].cw_min == 0) { 3745 link_info(link, 3746 "AP has invalid WMM params (missing AC %d), using defaults\n", 3747 ac); 3748 return false; 3749 } 3750 } 3751 3752 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3753 link->tx_conf[ac] = params[ac]; 3754 3755 return true; 3756 } 3757 3758 static bool 3759 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3760 struct ieee80211_link_data *link, 3761 const u8 *wmm_param, size_t wmm_param_len, 3762 const struct ieee80211_mu_edca_param_set *mu_edca) 3763 { 3764 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3765 mu_edca)) 3766 return false; 3767 3768 ieee80211_mgd_set_link_qos_params(link); 3769 3770 /* enable WMM or activate new settings */ 3771 link->conf->qos = true; 3772 return true; 3773 } 3774 3775 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3776 { 3777 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3778 3779 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3780 ieee80211_run_deferred_scan(sdata->local); 3781 } 3782 3783 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3784 { 3785 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3786 3787 __ieee80211_stop_poll(sdata); 3788 } 3789 3790 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3791 u16 capab, bool erp_valid, u8 erp) 3792 { 3793 struct ieee80211_bss_conf *bss_conf = link->conf; 3794 struct ieee80211_supported_band *sband; 3795 u64 changed = 0; 3796 bool use_protection; 3797 bool use_short_preamble; 3798 bool use_short_slot; 3799 3800 sband = ieee80211_get_link_sband(link); 3801 if (!sband) 3802 return changed; 3803 3804 if (erp_valid) { 3805 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3806 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3807 } else { 3808 use_protection = false; 3809 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3810 } 3811 3812 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3813 if (sband->band == NL80211_BAND_5GHZ || 3814 sband->band == NL80211_BAND_6GHZ) 3815 use_short_slot = true; 3816 3817 if (use_protection != bss_conf->use_cts_prot) { 3818 bss_conf->use_cts_prot = use_protection; 3819 changed |= BSS_CHANGED_ERP_CTS_PROT; 3820 } 3821 3822 if (use_short_preamble != bss_conf->use_short_preamble) { 3823 bss_conf->use_short_preamble = use_short_preamble; 3824 changed |= BSS_CHANGED_ERP_PREAMBLE; 3825 } 3826 3827 if (use_short_slot != bss_conf->use_short_slot) { 3828 bss_conf->use_short_slot = use_short_slot; 3829 changed |= BSS_CHANGED_ERP_SLOT; 3830 } 3831 3832 return changed; 3833 } 3834 3835 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3836 struct cfg80211_bss *cbss) 3837 { 3838 struct ieee80211_sub_if_data *sdata = link->sdata; 3839 struct ieee80211_bss_conf *bss_conf = link->conf; 3840 struct ieee80211_bss *bss = (void *)cbss->priv; 3841 u64 changed = BSS_CHANGED_QOS; 3842 3843 /* not really used in MLO */ 3844 sdata->u.mgd.beacon_timeout = 3845 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3846 bss_conf->beacon_int)); 3847 3848 changed |= ieee80211_handle_bss_capability(link, 3849 bss_conf->assoc_capability, 3850 bss->has_erp_value, 3851 bss->erp_value); 3852 3853 ieee80211_check_rate_mask(link); 3854 3855 link->conf->bss = cbss; 3856 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3857 3858 if (sdata->vif.p2p || 3859 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3860 const struct cfg80211_bss_ies *ies; 3861 3862 rcu_read_lock(); 3863 ies = rcu_dereference(cbss->ies); 3864 if (ies) { 3865 int ret; 3866 3867 ret = cfg80211_get_p2p_attr( 3868 ies->data, ies->len, 3869 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3870 (u8 *) &bss_conf->p2p_noa_attr, 3871 sizeof(bss_conf->p2p_noa_attr)); 3872 if (ret >= 2) { 3873 link->u.mgd.p2p_noa_index = 3874 bss_conf->p2p_noa_attr.index; 3875 changed |= BSS_CHANGED_P2P_PS; 3876 } 3877 } 3878 rcu_read_unlock(); 3879 } 3880 3881 if (link->u.mgd.have_beacon) { 3882 bss_conf->beacon_rate = bss->beacon_rate; 3883 changed |= BSS_CHANGED_BEACON_INFO; 3884 } else { 3885 bss_conf->beacon_rate = NULL; 3886 } 3887 3888 /* Tell the driver to monitor connection quality (if supported) */ 3889 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3890 bss_conf->cqm_rssi_thold) 3891 changed |= BSS_CHANGED_CQM; 3892 3893 return changed; 3894 } 3895 3896 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3897 struct ieee80211_mgd_assoc_data *assoc_data, 3898 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3899 { 3900 struct ieee80211_local *local = sdata->local; 3901 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3902 u64 vif_changed = BSS_CHANGED_ASSOC; 3903 unsigned int link_id; 3904 3905 lockdep_assert_wiphy(local->hw.wiphy); 3906 3907 sdata->u.mgd.associated = true; 3908 3909 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3910 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3911 struct ieee80211_link_data *link; 3912 3913 if (!cbss || 3914 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3915 continue; 3916 3917 if (ieee80211_vif_is_mld(&sdata->vif) && 3918 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3919 continue; 3920 3921 link = sdata_dereference(sdata->link[link_id], sdata); 3922 if (WARN_ON(!link)) 3923 return; 3924 3925 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3926 } 3927 3928 /* just to be sure */ 3929 ieee80211_stop_poll(sdata); 3930 3931 ieee80211_led_assoc(local, 1); 3932 3933 vif_cfg->assoc = 1; 3934 3935 /* Enable ARP filtering */ 3936 if (vif_cfg->arp_addr_cnt) 3937 vif_changed |= BSS_CHANGED_ARP_FILTER; 3938 3939 if (ieee80211_vif_is_mld(&sdata->vif)) { 3940 for (link_id = 0; 3941 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3942 link_id++) { 3943 struct ieee80211_link_data *link; 3944 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3945 3946 if (!cbss || 3947 !(BIT(link_id) & 3948 ieee80211_vif_usable_links(&sdata->vif)) || 3949 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3950 continue; 3951 3952 link = sdata_dereference(sdata->link[link_id], sdata); 3953 if (WARN_ON(!link)) 3954 return; 3955 3956 ieee80211_link_info_change_notify(sdata, link, 3957 changed[link_id]); 3958 3959 ieee80211_recalc_smps(sdata, link); 3960 } 3961 3962 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3963 } else { 3964 ieee80211_bss_info_change_notify(sdata, 3965 vif_changed | changed[0]); 3966 } 3967 3968 ieee80211_recalc_ps(local); 3969 3970 /* leave this here to not change ordering in non-MLO cases */ 3971 if (!ieee80211_vif_is_mld(&sdata->vif)) 3972 ieee80211_recalc_smps(sdata, &sdata->deflink); 3973 ieee80211_recalc_ps_vif(sdata); 3974 3975 netif_carrier_on(sdata->dev); 3976 } 3977 3978 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3979 { 3980 struct ieee80211_mgd_assoc_data *add_links_data = 3981 sdata->u.mgd.reconf.add_links_data; 3982 3983 if (!ieee80211_vif_is_mld(&sdata->vif) || 3984 !(sdata->u.mgd.reconf.added_links | 3985 sdata->u.mgd.reconf.removed_links)) 3986 return; 3987 3988 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3989 &sdata->u.mgd.reconf.wk); 3990 sdata->u.mgd.reconf.added_links = 0; 3991 sdata->u.mgd.reconf.removed_links = 0; 3992 sdata->u.mgd.reconf.dialog_token = 0; 3993 3994 if (add_links_data) { 3995 struct cfg80211_mlo_reconf_done_data done_data = {}; 3996 u8 link_id; 3997 3998 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3999 link_id++) 4000 done_data.links[link_id].bss = 4001 add_links_data->link[link_id].bss; 4002 4003 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4004 4005 kfree(sdata->u.mgd.reconf.add_links_data); 4006 sdata->u.mgd.reconf.add_links_data = NULL; 4007 } 4008 } 4009 4010 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4011 u16 stype, u16 reason, bool tx, 4012 u8 *frame_buf) 4013 { 4014 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4015 struct ieee80211_local *local = sdata->local; 4016 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4017 unsigned int link_id; 4018 u64 changed = 0; 4019 struct ieee80211_prep_tx_info info = { 4020 .subtype = stype, 4021 .was_assoc = true, 4022 .link_id = ffs(sdata->vif.active_links) - 1, 4023 }; 4024 4025 lockdep_assert_wiphy(local->hw.wiphy); 4026 4027 if (frame_buf) 4028 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4029 4030 if (WARN_ON(!ap_sta)) 4031 return; 4032 4033 if (WARN_ON_ONCE(tx && !frame_buf)) 4034 return; 4035 4036 if (WARN_ON(!ifmgd->associated)) 4037 return; 4038 4039 ieee80211_stop_poll(sdata); 4040 4041 ifmgd->associated = false; 4042 4043 if (tx) { 4044 bool tx_link_found = false; 4045 4046 for (link_id = 0; 4047 link_id < ARRAY_SIZE(sdata->link); 4048 link_id++) { 4049 struct ieee80211_link_data *link; 4050 4051 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4052 continue; 4053 4054 link = sdata_dereference(sdata->link[link_id], sdata); 4055 if (WARN_ON_ONCE(!link)) 4056 continue; 4057 4058 if (link->u.mgd.csa.blocked_tx) 4059 continue; 4060 4061 tx_link_found = true; 4062 break; 4063 } 4064 4065 tx = tx_link_found; 4066 } 4067 4068 /* other links will be destroyed */ 4069 sdata->deflink.conf->bss = NULL; 4070 sdata->deflink.conf->epcs_support = false; 4071 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4072 4073 netif_carrier_off(sdata->dev); 4074 4075 /* 4076 * if we want to get out of ps before disassoc (why?) we have 4077 * to do it before sending disassoc, as otherwise the null-packet 4078 * won't be valid. 4079 */ 4080 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4081 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4082 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4083 } 4084 local->ps_sdata = NULL; 4085 4086 /* disable per-vif ps */ 4087 ieee80211_recalc_ps_vif(sdata); 4088 4089 /* make sure ongoing transmission finishes */ 4090 synchronize_net(); 4091 4092 /* 4093 * drop any frame before deauth/disassoc, this can be data or 4094 * management frame. Since we are disconnecting, we should not 4095 * insist sending these frames which can take time and delay 4096 * the disconnection and possible the roaming. 4097 */ 4098 ieee80211_flush_queues(local, sdata, true); 4099 4100 if (tx) { 4101 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4102 4103 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4104 sdata->vif.cfg.ap_addr, stype, 4105 reason, true, frame_buf); 4106 4107 /* flush out frame - make sure the deauth was actually sent */ 4108 ieee80211_flush_queues(local, sdata, false); 4109 4110 drv_mgd_complete_tx(sdata->local, sdata, &info); 4111 } else if (frame_buf) { 4112 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4113 sdata->vif.cfg.ap_addr, stype, 4114 reason, false, frame_buf); 4115 } 4116 4117 /* clear AP addr only after building the needed mgmt frames */ 4118 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4119 eth_zero_addr(sdata->vif.cfg.ap_addr); 4120 4121 sdata->vif.cfg.ssid_len = 0; 4122 4123 /* Remove TDLS peers */ 4124 __sta_info_flush(sdata, false, -1, ap_sta); 4125 4126 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4127 /* Only move the AP state */ 4128 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4129 } else { 4130 /* Remove AP peer */ 4131 sta_info_flush(sdata, -1); 4132 } 4133 4134 /* finally reset all BSS / config parameters */ 4135 if (!ieee80211_vif_is_mld(&sdata->vif)) 4136 changed |= ieee80211_reset_erp_info(sdata); 4137 4138 ieee80211_led_assoc(local, 0); 4139 changed |= BSS_CHANGED_ASSOC; 4140 sdata->vif.cfg.assoc = false; 4141 4142 sdata->deflink.u.mgd.p2p_noa_index = -1; 4143 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4144 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4145 4146 /* on the next assoc, re-program HT/VHT parameters */ 4147 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4148 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4149 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4150 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4151 4152 /* 4153 * reset MU-MIMO ownership and group data in default link, 4154 * if used, other links are destroyed 4155 */ 4156 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4157 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4158 memset(sdata->vif.bss_conf.mu_group.position, 0, 4159 sizeof(sdata->vif.bss_conf.mu_group.position)); 4160 if (!ieee80211_vif_is_mld(&sdata->vif)) 4161 changed |= BSS_CHANGED_MU_GROUPS; 4162 sdata->vif.bss_conf.mu_mimo_owner = false; 4163 4164 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4165 4166 timer_delete_sync(&local->dynamic_ps_timer); 4167 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4168 4169 /* Disable ARP filtering */ 4170 if (sdata->vif.cfg.arp_addr_cnt) 4171 changed |= BSS_CHANGED_ARP_FILTER; 4172 4173 sdata->vif.bss_conf.qos = false; 4174 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4175 changed |= BSS_CHANGED_QOS; 4176 /* The BSSID (not really interesting) and HT changed */ 4177 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4178 ieee80211_bss_info_change_notify(sdata, changed); 4179 } else { 4180 ieee80211_vif_cfg_change_notify(sdata, changed); 4181 } 4182 4183 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4184 /* 4185 * After notifying the driver about the disassoc, 4186 * remove the ap sta. 4187 */ 4188 sta_info_flush(sdata, -1); 4189 } 4190 4191 /* disassociated - set to defaults now */ 4192 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4193 4194 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4195 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4196 timer_delete_sync(&sdata->u.mgd.timer); 4197 4198 sdata->vif.bss_conf.dtim_period = 0; 4199 sdata->vif.bss_conf.beacon_rate = NULL; 4200 4201 sdata->deflink.u.mgd.have_beacon = false; 4202 sdata->deflink.u.mgd.tracking_signal_avg = false; 4203 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4204 4205 ifmgd->flags = 0; 4206 4207 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4208 struct ieee80211_link_data *link; 4209 4210 link = sdata_dereference(sdata->link[link_id], sdata); 4211 if (!link) 4212 continue; 4213 ieee80211_link_release_channel(link); 4214 } 4215 4216 sdata->vif.bss_conf.csa_active = false; 4217 sdata->deflink.u.mgd.csa.blocked_tx = false; 4218 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4219 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4220 ieee80211_vif_unblock_queues_csa(sdata); 4221 4222 /* existing TX TSPEC sessions no longer exist */ 4223 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4224 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4225 4226 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4227 sdata->vif.bss_conf.pwr_reduction = 0; 4228 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4229 4230 sdata->vif.cfg.eml_cap = 0; 4231 sdata->vif.cfg.eml_med_sync_delay = 0; 4232 sdata->vif.cfg.mld_capa_op = 0; 4233 4234 memset(&sdata->u.mgd.ttlm_info, 0, 4235 sizeof(sdata->u.mgd.ttlm_info)); 4236 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4237 4238 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4239 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4240 &ifmgd->neg_ttlm_timeout_work); 4241 4242 sdata->u.mgd.removed_links = 0; 4243 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4244 &sdata->u.mgd.ml_reconf_work); 4245 4246 wiphy_work_cancel(sdata->local->hw.wiphy, 4247 &ifmgd->teardown_ttlm_work); 4248 4249 /* if disconnection happens in the middle of the ML reconfiguration 4250 * flow, cfg80211 must called to release the BSS references obtained 4251 * when the flow started. 4252 */ 4253 ieee80211_ml_reconf_reset(sdata); 4254 4255 ieee80211_vif_set_links(sdata, 0, 0); 4256 4257 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4258 4259 ifmgd->epcs.enabled = false; 4260 ifmgd->epcs.dialog_token = 0; 4261 4262 memset(ifmgd->userspace_selectors, 0, 4263 sizeof(ifmgd->userspace_selectors)); 4264 } 4265 4266 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4267 { 4268 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4269 struct ieee80211_local *local = sdata->local; 4270 4271 lockdep_assert_wiphy(local->hw.wiphy); 4272 4273 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4274 return; 4275 4276 __ieee80211_stop_poll(sdata); 4277 4278 ieee80211_recalc_ps(local); 4279 4280 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4281 return; 4282 4283 /* 4284 * We've received a probe response, but are not sure whether 4285 * we have or will be receiving any beacons or data, so let's 4286 * schedule the timers again, just in case. 4287 */ 4288 ieee80211_sta_reset_beacon_monitor(sdata); 4289 4290 mod_timer(&ifmgd->conn_mon_timer, 4291 round_jiffies_up(jiffies + 4292 IEEE80211_CONNECTION_IDLE_TIME)); 4293 } 4294 4295 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4296 struct ieee80211_hdr *hdr, 4297 u16 tx_time) 4298 { 4299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4300 u16 tid; 4301 int ac; 4302 struct ieee80211_sta_tx_tspec *tx_tspec; 4303 unsigned long now = jiffies; 4304 4305 if (!ieee80211_is_data_qos(hdr->frame_control)) 4306 return; 4307 4308 tid = ieee80211_get_tid(hdr); 4309 ac = ieee80211_ac_from_tid(tid); 4310 tx_tspec = &ifmgd->tx_tspec[ac]; 4311 4312 if (likely(!tx_tspec->admitted_time)) 4313 return; 4314 4315 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4316 tx_tspec->consumed_tx_time = 0; 4317 tx_tspec->time_slice_start = now; 4318 4319 if (tx_tspec->downgraded) { 4320 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4321 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4322 &ifmgd->tx_tspec_wk, 0); 4323 } 4324 } 4325 4326 if (tx_tspec->downgraded) 4327 return; 4328 4329 tx_tspec->consumed_tx_time += tx_time; 4330 4331 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4332 tx_tspec->downgraded = true; 4333 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4334 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4335 &ifmgd->tx_tspec_wk, 0); 4336 } 4337 } 4338 4339 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4340 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4341 { 4342 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4343 4344 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4345 !sdata->u.mgd.probe_send_count) 4346 return; 4347 4348 if (ack) 4349 sdata->u.mgd.probe_send_count = 0; 4350 else 4351 sdata->u.mgd.nullfunc_failed = true; 4352 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4353 } 4354 4355 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4356 const u8 *src, const u8 *dst, 4357 const u8 *ssid, size_t ssid_len, 4358 struct ieee80211_channel *channel) 4359 { 4360 struct sk_buff *skb; 4361 4362 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4363 ssid, ssid_len, NULL, 0, 4364 IEEE80211_PROBE_FLAG_DIRECTED); 4365 if (skb) 4366 ieee80211_tx_skb(sdata, skb); 4367 } 4368 4369 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4370 { 4371 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4372 u8 *dst = sdata->vif.cfg.ap_addr; 4373 u8 unicast_limit = max(1, max_probe_tries - 3); 4374 struct sta_info *sta; 4375 4376 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4377 4378 /* 4379 * Try sending broadcast probe requests for the last three 4380 * probe requests after the first ones failed since some 4381 * buggy APs only support broadcast probe requests. 4382 */ 4383 if (ifmgd->probe_send_count >= unicast_limit) 4384 dst = NULL; 4385 4386 /* 4387 * When the hardware reports an accurate Tx ACK status, it's 4388 * better to send a nullfunc frame instead of a probe request, 4389 * as it will kick us off the AP quickly if we aren't associated 4390 * anymore. The timeout will be reset if the frame is ACKed by 4391 * the AP. 4392 */ 4393 ifmgd->probe_send_count++; 4394 4395 if (dst) { 4396 sta = sta_info_get(sdata, dst); 4397 if (!WARN_ON(!sta)) 4398 ieee80211_check_fast_rx(sta); 4399 } 4400 4401 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4402 ifmgd->nullfunc_failed = false; 4403 ieee80211_send_nullfunc(sdata->local, sdata, false); 4404 } else { 4405 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4406 sdata->vif.cfg.ssid, 4407 sdata->vif.cfg.ssid_len, 4408 sdata->deflink.conf->bss->channel); 4409 } 4410 4411 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4412 run_again(sdata, ifmgd->probe_timeout); 4413 } 4414 4415 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4416 bool beacon) 4417 { 4418 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4419 bool already = false; 4420 4421 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4422 4423 if (!ieee80211_sdata_running(sdata)) 4424 return; 4425 4426 if (!ifmgd->associated) 4427 return; 4428 4429 if (sdata->local->tmp_channel || sdata->local->scanning) 4430 return; 4431 4432 if (sdata->local->suspending) { 4433 /* reschedule after resume */ 4434 ieee80211_reset_ap_probe(sdata); 4435 return; 4436 } 4437 4438 if (beacon) { 4439 mlme_dbg_ratelimited(sdata, 4440 "detected beacon loss from AP (missed %d beacons) - probing\n", 4441 beacon_loss_count); 4442 4443 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4444 } 4445 4446 /* 4447 * The driver/our work has already reported this event or the 4448 * connection monitoring has kicked in and we have already sent 4449 * a probe request. Or maybe the AP died and the driver keeps 4450 * reporting until we disassociate... 4451 * 4452 * In either case we have to ignore the current call to this 4453 * function (except for setting the correct probe reason bit) 4454 * because otherwise we would reset the timer every time and 4455 * never check whether we received a probe response! 4456 */ 4457 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4458 already = true; 4459 4460 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4461 4462 if (already) 4463 return; 4464 4465 ieee80211_recalc_ps(sdata->local); 4466 4467 ifmgd->probe_send_count = 0; 4468 ieee80211_mgd_probe_ap_send(sdata); 4469 } 4470 4471 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4472 struct ieee80211_vif *vif) 4473 { 4474 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4475 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4476 struct cfg80211_bss *cbss; 4477 struct sk_buff *skb; 4478 const struct element *ssid; 4479 int ssid_len; 4480 4481 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4482 4483 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4484 ieee80211_vif_is_mld(&sdata->vif))) 4485 return NULL; 4486 4487 if (ifmgd->associated) 4488 cbss = sdata->deflink.conf->bss; 4489 else if (ifmgd->auth_data) 4490 cbss = ifmgd->auth_data->bss; 4491 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4492 cbss = ifmgd->assoc_data->link[0].bss; 4493 else 4494 return NULL; 4495 4496 rcu_read_lock(); 4497 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4498 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4499 "invalid SSID element (len=%d)", 4500 ssid ? ssid->datalen : -1)) 4501 ssid_len = 0; 4502 else 4503 ssid_len = ssid->datalen; 4504 4505 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4506 (u32) -1, cbss->channel, 4507 ssid->data, ssid_len, 4508 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4509 rcu_read_unlock(); 4510 4511 return skb; 4512 } 4513 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4514 4515 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4516 const u8 *buf, size_t len, bool tx, 4517 u16 reason, bool reconnect) 4518 { 4519 struct ieee80211_event event = { 4520 .type = MLME_EVENT, 4521 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4522 .u.mlme.reason = reason, 4523 }; 4524 4525 if (tx) 4526 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4527 else 4528 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4529 4530 drv_event_callback(sdata->local, sdata, &event); 4531 } 4532 4533 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4534 { 4535 struct ieee80211_local *local = sdata->local; 4536 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4537 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4538 4539 lockdep_assert_wiphy(local->hw.wiphy); 4540 4541 if (!ifmgd->associated) 4542 return; 4543 4544 if (!ifmgd->driver_disconnect) { 4545 unsigned int link_id; 4546 4547 /* 4548 * AP is probably out of range (or not reachable for another 4549 * reason) so remove the bss structs for that AP. In the case 4550 * of multi-link, it's not clear that all of them really are 4551 * out of range, but if they weren't the driver likely would 4552 * have switched to just have a single link active? 4553 */ 4554 for (link_id = 0; 4555 link_id < ARRAY_SIZE(sdata->link); 4556 link_id++) { 4557 struct ieee80211_link_data *link; 4558 4559 link = sdata_dereference(sdata->link[link_id], sdata); 4560 if (!link || !link->conf->bss) 4561 continue; 4562 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4563 link->conf->bss = NULL; 4564 } 4565 } 4566 4567 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4568 ifmgd->driver_disconnect ? 4569 WLAN_REASON_DEAUTH_LEAVING : 4570 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4571 true, frame_buf); 4572 /* the other links will be destroyed */ 4573 sdata->vif.bss_conf.csa_active = false; 4574 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4575 sdata->deflink.u.mgd.csa.blocked_tx = false; 4576 ieee80211_vif_unblock_queues_csa(sdata); 4577 4578 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4579 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4580 ifmgd->reconnect); 4581 ifmgd->reconnect = false; 4582 } 4583 4584 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4585 struct wiphy_work *work) 4586 { 4587 struct ieee80211_sub_if_data *sdata = 4588 container_of(work, struct ieee80211_sub_if_data, 4589 u.mgd.beacon_connection_loss_work); 4590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4591 4592 if (ifmgd->connection_loss) { 4593 sdata_info(sdata, "Connection to AP %pM lost\n", 4594 sdata->vif.cfg.ap_addr); 4595 __ieee80211_disconnect(sdata); 4596 ifmgd->connection_loss = false; 4597 } else if (ifmgd->driver_disconnect) { 4598 sdata_info(sdata, 4599 "Driver requested disconnection from AP %pM\n", 4600 sdata->vif.cfg.ap_addr); 4601 __ieee80211_disconnect(sdata); 4602 ifmgd->driver_disconnect = false; 4603 } else { 4604 if (ifmgd->associated) 4605 sdata->deflink.u.mgd.beacon_loss_count++; 4606 ieee80211_mgd_probe_ap(sdata, true); 4607 } 4608 } 4609 4610 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4611 struct wiphy_work *work) 4612 { 4613 struct ieee80211_sub_if_data *sdata = 4614 container_of(work, struct ieee80211_sub_if_data, 4615 u.mgd.csa_connection_drop_work); 4616 4617 __ieee80211_disconnect(sdata); 4618 } 4619 4620 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4621 { 4622 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4623 struct ieee80211_hw *hw = &sdata->local->hw; 4624 4625 trace_api_beacon_loss(sdata); 4626 4627 sdata->u.mgd.connection_loss = false; 4628 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4629 } 4630 EXPORT_SYMBOL(ieee80211_beacon_loss); 4631 4632 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4633 { 4634 struct ieee80211_sub_if_data *sdata; 4635 struct ieee80211_hw *hw; 4636 4637 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4638 4639 sdata = vif_to_sdata(vif); 4640 hw = &sdata->local->hw; 4641 4642 trace_api_connection_loss(sdata); 4643 4644 sdata->u.mgd.connection_loss = true; 4645 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4646 } 4647 EXPORT_SYMBOL(ieee80211_connection_loss); 4648 4649 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4650 { 4651 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4652 struct ieee80211_hw *hw = &sdata->local->hw; 4653 4654 trace_api_disconnect(sdata, reconnect); 4655 4656 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4657 return; 4658 4659 sdata->u.mgd.driver_disconnect = true; 4660 sdata->u.mgd.reconnect = reconnect; 4661 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4662 } 4663 EXPORT_SYMBOL(ieee80211_disconnect); 4664 4665 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4666 bool assoc) 4667 { 4668 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4669 4670 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4671 4672 sdata->u.mgd.auth_data = NULL; 4673 4674 if (!assoc) { 4675 /* 4676 * we are not authenticated yet, the only timer that could be 4677 * running is the timeout for the authentication response which 4678 * which is not relevant anymore. 4679 */ 4680 timer_delete_sync(&sdata->u.mgd.timer); 4681 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4682 4683 /* other links are destroyed */ 4684 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4685 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4686 BSS_CHANGED_BSSID); 4687 sdata->u.mgd.flags = 0; 4688 4689 ieee80211_link_release_channel(&sdata->deflink); 4690 ieee80211_vif_set_links(sdata, 0, 0); 4691 } 4692 4693 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4694 kfree(auth_data); 4695 } 4696 4697 enum assoc_status { 4698 ASSOC_SUCCESS, 4699 ASSOC_REJECTED, 4700 ASSOC_TIMEOUT, 4701 ASSOC_ABANDON, 4702 }; 4703 4704 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4705 enum assoc_status status) 4706 { 4707 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4708 4709 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4710 4711 sdata->u.mgd.assoc_data = NULL; 4712 4713 if (status != ASSOC_SUCCESS) { 4714 /* 4715 * we are not associated yet, the only timer that could be 4716 * running is the timeout for the association response which 4717 * which is not relevant anymore. 4718 */ 4719 timer_delete_sync(&sdata->u.mgd.timer); 4720 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4721 4722 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4723 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4724 BSS_CHANGED_BSSID); 4725 sdata->u.mgd.flags = 0; 4726 sdata->vif.bss_conf.mu_mimo_owner = false; 4727 4728 if (status != ASSOC_REJECTED) { 4729 struct cfg80211_assoc_failure data = { 4730 .timeout = status == ASSOC_TIMEOUT, 4731 }; 4732 int i; 4733 4734 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4735 ARRAY_SIZE(assoc_data->link)); 4736 4737 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4738 data.bss[i] = assoc_data->link[i].bss; 4739 4740 if (ieee80211_vif_is_mld(&sdata->vif)) 4741 data.ap_mld_addr = assoc_data->ap_addr; 4742 4743 cfg80211_assoc_failure(sdata->dev, &data); 4744 } 4745 4746 ieee80211_link_release_channel(&sdata->deflink); 4747 ieee80211_vif_set_links(sdata, 0, 0); 4748 } 4749 4750 kfree(assoc_data); 4751 } 4752 4753 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4754 struct ieee80211_mgmt *mgmt, size_t len) 4755 { 4756 struct ieee80211_local *local = sdata->local; 4757 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4758 const struct element *challenge; 4759 u8 *pos; 4760 u32 tx_flags = 0; 4761 struct ieee80211_prep_tx_info info = { 4762 .subtype = IEEE80211_STYPE_AUTH, 4763 .link_id = auth_data->link_id, 4764 }; 4765 4766 pos = mgmt->u.auth.variable; 4767 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4768 len - (pos - (u8 *)mgmt)); 4769 if (!challenge) 4770 return; 4771 auth_data->expected_transaction = 4; 4772 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4773 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4774 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4775 IEEE80211_TX_INTFL_MLME_CONN_TX; 4776 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4777 (void *)challenge, 4778 challenge->datalen + sizeof(*challenge), 4779 auth_data->ap_addr, auth_data->ap_addr, 4780 auth_data->key, auth_data->key_len, 4781 auth_data->key_idx, tx_flags); 4782 } 4783 4784 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4785 { 4786 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4787 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4788 struct sta_info *sta; 4789 4790 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4791 4792 sdata_info(sdata, "authenticated\n"); 4793 ifmgd->auth_data->done = true; 4794 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4795 ifmgd->auth_data->timeout_started = true; 4796 run_again(sdata, ifmgd->auth_data->timeout); 4797 4798 /* move station state to auth */ 4799 sta = sta_info_get(sdata, ap_addr); 4800 if (!sta) { 4801 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4802 return false; 4803 } 4804 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4805 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4806 return false; 4807 } 4808 4809 return true; 4810 } 4811 4812 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4813 struct ieee80211_mgmt *mgmt, size_t len) 4814 { 4815 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4816 u16 auth_alg, auth_transaction, status_code; 4817 struct ieee80211_event event = { 4818 .type = MLME_EVENT, 4819 .u.mlme.data = AUTH_EVENT, 4820 }; 4821 struct ieee80211_prep_tx_info info = { 4822 .subtype = IEEE80211_STYPE_AUTH, 4823 }; 4824 bool sae_need_confirm = false; 4825 4826 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4827 4828 if (len < 24 + 6) 4829 return; 4830 4831 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4832 return; 4833 4834 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4835 return; 4836 4837 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4838 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4839 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4840 4841 info.link_id = ifmgd->auth_data->link_id; 4842 4843 if (auth_alg != ifmgd->auth_data->algorithm || 4844 (auth_alg != WLAN_AUTH_SAE && 4845 auth_transaction != ifmgd->auth_data->expected_transaction) || 4846 (auth_alg == WLAN_AUTH_SAE && 4847 (auth_transaction < ifmgd->auth_data->expected_transaction || 4848 auth_transaction > 2))) { 4849 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4850 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4851 auth_transaction, 4852 ifmgd->auth_data->expected_transaction); 4853 goto notify_driver; 4854 } 4855 4856 if (status_code != WLAN_STATUS_SUCCESS) { 4857 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4858 4859 if (auth_alg == WLAN_AUTH_SAE && 4860 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4861 (auth_transaction == 1 && 4862 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4863 status_code == WLAN_STATUS_SAE_PK)))) { 4864 /* waiting for userspace now */ 4865 ifmgd->auth_data->waiting = true; 4866 ifmgd->auth_data->timeout = 4867 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4868 ifmgd->auth_data->timeout_started = true; 4869 run_again(sdata, ifmgd->auth_data->timeout); 4870 if (auth_transaction == 1) 4871 sae_need_confirm = true; 4872 goto notify_driver; 4873 } 4874 4875 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4876 mgmt->sa, status_code); 4877 ieee80211_destroy_auth_data(sdata, false); 4878 event.u.mlme.status = MLME_DENIED; 4879 event.u.mlme.reason = status_code; 4880 drv_event_callback(sdata->local, sdata, &event); 4881 goto notify_driver; 4882 } 4883 4884 switch (ifmgd->auth_data->algorithm) { 4885 case WLAN_AUTH_OPEN: 4886 case WLAN_AUTH_LEAP: 4887 case WLAN_AUTH_FT: 4888 case WLAN_AUTH_SAE: 4889 case WLAN_AUTH_FILS_SK: 4890 case WLAN_AUTH_FILS_SK_PFS: 4891 case WLAN_AUTH_FILS_PK: 4892 break; 4893 case WLAN_AUTH_SHARED_KEY: 4894 if (ifmgd->auth_data->expected_transaction != 4) { 4895 ieee80211_auth_challenge(sdata, mgmt, len); 4896 /* need another frame */ 4897 return; 4898 } 4899 break; 4900 default: 4901 WARN_ONCE(1, "invalid auth alg %d", 4902 ifmgd->auth_data->algorithm); 4903 goto notify_driver; 4904 } 4905 4906 event.u.mlme.status = MLME_SUCCESS; 4907 info.success = 1; 4908 drv_event_callback(sdata->local, sdata, &event); 4909 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4910 (auth_transaction == 2 && 4911 ifmgd->auth_data->expected_transaction == 2)) { 4912 if (!ieee80211_mark_sta_auth(sdata)) 4913 return; /* ignore frame -- wait for timeout */ 4914 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4915 auth_transaction == 1) { 4916 sae_need_confirm = true; 4917 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4918 auth_transaction == 2) { 4919 sdata_info(sdata, "SAE peer confirmed\n"); 4920 ifmgd->auth_data->peer_confirmed = true; 4921 } 4922 4923 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4924 notify_driver: 4925 if (!sae_need_confirm) 4926 drv_mgd_complete_tx(sdata->local, sdata, &info); 4927 } 4928 4929 #define case_WLAN(type) \ 4930 case WLAN_REASON_##type: return #type 4931 4932 const char *ieee80211_get_reason_code_string(u16 reason_code) 4933 { 4934 switch (reason_code) { 4935 case_WLAN(UNSPECIFIED); 4936 case_WLAN(PREV_AUTH_NOT_VALID); 4937 case_WLAN(DEAUTH_LEAVING); 4938 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4939 case_WLAN(DISASSOC_AP_BUSY); 4940 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4941 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4942 case_WLAN(DISASSOC_STA_HAS_LEFT); 4943 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4944 case_WLAN(DISASSOC_BAD_POWER); 4945 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4946 case_WLAN(INVALID_IE); 4947 case_WLAN(MIC_FAILURE); 4948 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4949 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4950 case_WLAN(IE_DIFFERENT); 4951 case_WLAN(INVALID_GROUP_CIPHER); 4952 case_WLAN(INVALID_PAIRWISE_CIPHER); 4953 case_WLAN(INVALID_AKMP); 4954 case_WLAN(UNSUPP_RSN_VERSION); 4955 case_WLAN(INVALID_RSN_IE_CAP); 4956 case_WLAN(IEEE8021X_FAILED); 4957 case_WLAN(CIPHER_SUITE_REJECTED); 4958 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4959 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4960 case_WLAN(DISASSOC_LOW_ACK); 4961 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4962 case_WLAN(QSTA_LEAVE_QBSS); 4963 case_WLAN(QSTA_NOT_USE); 4964 case_WLAN(QSTA_REQUIRE_SETUP); 4965 case_WLAN(QSTA_TIMEOUT); 4966 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4967 case_WLAN(MESH_PEER_CANCELED); 4968 case_WLAN(MESH_MAX_PEERS); 4969 case_WLAN(MESH_CONFIG); 4970 case_WLAN(MESH_CLOSE); 4971 case_WLAN(MESH_MAX_RETRIES); 4972 case_WLAN(MESH_CONFIRM_TIMEOUT); 4973 case_WLAN(MESH_INVALID_GTK); 4974 case_WLAN(MESH_INCONSISTENT_PARAM); 4975 case_WLAN(MESH_INVALID_SECURITY); 4976 case_WLAN(MESH_PATH_ERROR); 4977 case_WLAN(MESH_PATH_NOFORWARD); 4978 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4979 case_WLAN(MAC_EXISTS_IN_MBSS); 4980 case_WLAN(MESH_CHAN_REGULATORY); 4981 case_WLAN(MESH_CHAN); 4982 default: return "<unknown>"; 4983 } 4984 } 4985 4986 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4987 struct ieee80211_mgmt *mgmt, size_t len) 4988 { 4989 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4990 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4991 4992 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4993 4994 if (len < 24 + 2) 4995 return; 4996 4997 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4998 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4999 return; 5000 } 5001 5002 if (ifmgd->associated && 5003 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5004 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5005 sdata->vif.cfg.ap_addr, reason_code, 5006 ieee80211_get_reason_code_string(reason_code)); 5007 5008 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5009 5010 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5011 reason_code, false); 5012 return; 5013 } 5014 5015 if (ifmgd->assoc_data && 5016 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5017 sdata_info(sdata, 5018 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5019 ifmgd->assoc_data->ap_addr, reason_code, 5020 ieee80211_get_reason_code_string(reason_code)); 5021 5022 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5023 5024 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5025 return; 5026 } 5027 } 5028 5029 5030 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5031 struct ieee80211_mgmt *mgmt, size_t len) 5032 { 5033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5034 u16 reason_code; 5035 5036 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5037 5038 if (len < 24 + 2) 5039 return; 5040 5041 if (!ifmgd->associated || 5042 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5043 return; 5044 5045 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5046 5047 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5048 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5049 return; 5050 } 5051 5052 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5053 sdata->vif.cfg.ap_addr, reason_code, 5054 ieee80211_get_reason_code_string(reason_code)); 5055 5056 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5057 5058 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5059 false); 5060 } 5061 5062 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5063 struct ieee80211_supported_band *sband, 5064 const struct link_sta_info *link_sta, 5065 const struct ieee802_11_elems *elems) 5066 { 5067 const struct ieee80211_sta_he_cap *own_he_cap = 5068 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5069 5070 if (elems->ext_capab_len < 10) 5071 return false; 5072 5073 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5074 return false; 5075 5076 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5077 IEEE80211_HE_MAC_CAP0_TWT_RES && 5078 own_he_cap && 5079 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5080 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5081 } 5082 5083 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5084 struct ieee80211_supported_band *sband, 5085 struct ieee80211_link_data *link, 5086 struct link_sta_info *link_sta, 5087 struct ieee802_11_elems *elems) 5088 { 5089 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5090 5091 if (link->conf->twt_requester != twt) { 5092 link->conf->twt_requester = twt; 5093 return BSS_CHANGED_TWT; 5094 } 5095 return 0; 5096 } 5097 5098 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5099 struct ieee80211_bss_conf *bss_conf, 5100 struct ieee80211_supported_band *sband, 5101 struct link_sta_info *link_sta) 5102 { 5103 const struct ieee80211_sta_he_cap *own_he_cap = 5104 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5105 5106 return bss_conf->he_support && 5107 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5108 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5109 own_he_cap && 5110 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5111 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5112 } 5113 5114 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5115 bool enabled) 5116 { 5117 /* in any case this is called, dialog token should be reset */ 5118 sdata->u.mgd.epcs.dialog_token = 0; 5119 5120 if (sdata->u.mgd.epcs.enabled == enabled) 5121 return; 5122 5123 sdata->u.mgd.epcs.enabled = enabled; 5124 cfg80211_epcs_changed(sdata->dev, enabled); 5125 } 5126 5127 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5128 { 5129 struct ieee80211_local *local = sdata->local; 5130 u8 link_id; 5131 5132 if (!sdata->u.mgd.epcs.enabled) 5133 return; 5134 5135 lockdep_assert_wiphy(local->hw.wiphy); 5136 5137 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5138 struct ieee802_11_elems *elems; 5139 struct ieee80211_link_data *link; 5140 const struct cfg80211_bss_ies *ies; 5141 bool ret; 5142 5143 rcu_read_lock(); 5144 5145 link = sdata_dereference(sdata->link[link_id], sdata); 5146 if (!link || !link->conf || !link->conf->bss) { 5147 rcu_read_unlock(); 5148 continue; 5149 } 5150 5151 if (link->u.mgd.disable_wmm_tracking) { 5152 rcu_read_unlock(); 5153 ieee80211_set_wmm_default(link, false, false); 5154 continue; 5155 } 5156 5157 ies = rcu_dereference(link->conf->bss->beacon_ies); 5158 if (!ies) { 5159 rcu_read_unlock(); 5160 ieee80211_set_wmm_default(link, false, false); 5161 continue; 5162 } 5163 5164 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5165 NULL); 5166 if (!elems) { 5167 rcu_read_unlock(); 5168 ieee80211_set_wmm_default(link, false, false); 5169 continue; 5170 } 5171 5172 ret = _ieee80211_sta_wmm_params(local, link, 5173 elems->wmm_param, 5174 elems->wmm_param_len, 5175 elems->mu_edca_param_set); 5176 5177 kfree(elems); 5178 rcu_read_unlock(); 5179 5180 if (!ret) { 5181 ieee80211_set_wmm_default(link, false, false); 5182 continue; 5183 } 5184 5185 ieee80211_mgd_set_link_qos_params(link); 5186 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5187 } 5188 } 5189 5190 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5191 struct link_sta_info *link_sta, 5192 struct cfg80211_bss *cbss, 5193 struct ieee80211_mgmt *mgmt, 5194 const u8 *elem_start, 5195 unsigned int elem_len, 5196 u64 *changed) 5197 { 5198 struct ieee80211_sub_if_data *sdata = link->sdata; 5199 struct ieee80211_mgd_assoc_data *assoc_data = 5200 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5201 struct ieee80211_bss_conf *bss_conf = link->conf; 5202 struct ieee80211_local *local = sdata->local; 5203 unsigned int link_id = link->link_id; 5204 struct ieee80211_elems_parse_params parse_params = { 5205 .mode = link->u.mgd.conn.mode, 5206 .start = elem_start, 5207 .len = elem_len, 5208 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5209 .from_ap = true, 5210 }; 5211 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5212 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5213 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5214 const struct cfg80211_bss_ies *bss_ies = NULL; 5215 struct ieee80211_supported_band *sband; 5216 struct ieee802_11_elems *elems; 5217 const __le16 prof_bss_param_ch_present = 5218 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5219 u16 capab_info; 5220 bool ret; 5221 5222 elems = ieee802_11_parse_elems_full(&parse_params); 5223 if (!elems) 5224 return false; 5225 5226 if (link_id == assoc_data->assoc_link_id) { 5227 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5228 5229 /* 5230 * we should not get to this flow unless the association was 5231 * successful, so set the status directly to success 5232 */ 5233 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5234 if (elems->ml_basic) { 5235 int bss_param_ch_cnt = 5236 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5237 5238 if (bss_param_ch_cnt < 0) { 5239 ret = false; 5240 goto out; 5241 } 5242 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5243 bss_conf->bss_param_ch_cnt_link_id = link_id; 5244 } 5245 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5246 !elems->prof || 5247 !(elems->prof->control & prof_bss_param_ch_present)) { 5248 ret = false; 5249 goto out; 5250 } else { 5251 const u8 *ptr = elems->prof->variable + 5252 elems->prof->sta_info_len - 1; 5253 int bss_param_ch_cnt; 5254 5255 /* 5256 * During parsing, we validated that these fields exist, 5257 * otherwise elems->prof would have been set to NULL. 5258 */ 5259 capab_info = get_unaligned_le16(ptr); 5260 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5261 bss_param_ch_cnt = 5262 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5263 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5264 bss_conf->bss_param_ch_cnt_link_id = link_id; 5265 5266 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5267 link_info(link, "association response status code=%u\n", 5268 assoc_data->link[link_id].status); 5269 ret = true; 5270 goto out; 5271 } 5272 } 5273 5274 if (!is_s1g && !elems->supp_rates) { 5275 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5276 ret = false; 5277 goto out; 5278 } 5279 5280 link->u.mgd.tdls_chan_switch_prohibited = 5281 elems->ext_capab && elems->ext_capab_len >= 5 && 5282 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5283 5284 /* 5285 * Some APs are erroneously not including some information in their 5286 * (re)association response frames. Try to recover by using the data 5287 * from the beacon or probe response. This seems to afflict mobile 5288 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5289 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5290 */ 5291 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5292 ((assoc_data->wmm && !elems->wmm_param) || 5293 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5294 (!elems->ht_cap_elem || !elems->ht_operation)) || 5295 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5296 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5297 const struct cfg80211_bss_ies *ies; 5298 struct ieee802_11_elems *bss_elems; 5299 5300 rcu_read_lock(); 5301 ies = rcu_dereference(cbss->ies); 5302 if (ies) 5303 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5304 GFP_ATOMIC); 5305 rcu_read_unlock(); 5306 if (!bss_ies) { 5307 ret = false; 5308 goto out; 5309 } 5310 5311 parse_params.start = bss_ies->data; 5312 parse_params.len = bss_ies->len; 5313 parse_params.bss = cbss; 5314 parse_params.link_id = -1; 5315 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5316 if (!bss_elems) { 5317 ret = false; 5318 goto out; 5319 } 5320 5321 if (assoc_data->wmm && 5322 !elems->wmm_param && bss_elems->wmm_param) { 5323 elems->wmm_param = bss_elems->wmm_param; 5324 sdata_info(sdata, 5325 "AP bug: WMM param missing from AssocResp\n"); 5326 } 5327 5328 /* 5329 * Also check if we requested HT/VHT, otherwise the AP doesn't 5330 * have to include the IEs in the (re)association response. 5331 */ 5332 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5333 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5334 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5335 sdata_info(sdata, 5336 "AP bug: HT capability missing from AssocResp\n"); 5337 } 5338 if (!elems->ht_operation && bss_elems->ht_operation && 5339 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5340 elems->ht_operation = bss_elems->ht_operation; 5341 sdata_info(sdata, 5342 "AP bug: HT operation missing from AssocResp\n"); 5343 } 5344 5345 if (is_5ghz) { 5346 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5347 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5348 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5349 sdata_info(sdata, 5350 "AP bug: VHT capa missing from AssocResp\n"); 5351 } 5352 5353 if (!elems->vht_operation && bss_elems->vht_operation && 5354 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5355 elems->vht_operation = bss_elems->vht_operation; 5356 sdata_info(sdata, 5357 "AP bug: VHT operation missing from AssocResp\n"); 5358 } 5359 } 5360 kfree(bss_elems); 5361 } 5362 5363 /* 5364 * We previously checked these in the beacon/probe response, so 5365 * they should be present here. This is just a safety net. 5366 * Note that the ieee80211_config_bw() below would also check 5367 * for this (and more), but this has better error reporting. 5368 */ 5369 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5370 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5371 sdata_info(sdata, 5372 "HT AP is missing WMM params or HT capability/operation\n"); 5373 ret = false; 5374 goto out; 5375 } 5376 5377 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5378 (!elems->vht_cap_elem || !elems->vht_operation)) { 5379 sdata_info(sdata, 5380 "VHT AP is missing VHT capability/operation\n"); 5381 ret = false; 5382 goto out; 5383 } 5384 5385 /* check/update if AP changed anything in assoc response vs. scan */ 5386 if (ieee80211_config_bw(link, elems, 5387 link_id == assoc_data->assoc_link_id, 5388 changed, 5389 le16_to_cpu(mgmt->frame_control) & 5390 IEEE80211_FCTL_STYPE)) { 5391 ret = false; 5392 goto out; 5393 } 5394 5395 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5396 ret = false; 5397 goto out; 5398 } 5399 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5400 5401 /* Set up internal HT/VHT capabilities */ 5402 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5403 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5404 elems->ht_cap_elem, 5405 link_sta); 5406 5407 if (elems->vht_cap_elem && 5408 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5409 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5410 const struct cfg80211_bss_ies *ies; 5411 5412 /* 5413 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5414 * too large maximum MPDU length in the association response 5415 * (indicating 12k) that it cannot actually process ... 5416 * Work around that. 5417 */ 5418 rcu_read_lock(); 5419 ies = rcu_dereference(cbss->ies); 5420 if (ies) { 5421 const struct element *elem; 5422 5423 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5424 ies->data, ies->len); 5425 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5426 bss_vht_cap = (const void *)elem->data; 5427 } 5428 5429 if (ieee80211_hw_check(&local->hw, STRICT) && 5430 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5431 sizeof(*bss_vht_cap)))) { 5432 rcu_read_unlock(); 5433 ret = false; 5434 link_info(link, "VHT capabilities mismatch\n"); 5435 goto out; 5436 } 5437 5438 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5439 elems->vht_cap_elem, 5440 bss_vht_cap, link_sta); 5441 rcu_read_unlock(); 5442 } 5443 5444 if (elems->he_operation && 5445 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5446 elems->he_cap) { 5447 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5448 elems->he_cap, 5449 elems->he_cap_len, 5450 elems->he_6ghz_capa, 5451 link_sta); 5452 5453 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5454 if (elems->rsnx && elems->rsnx_len && 5455 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5456 wiphy_ext_feature_isset(local->hw.wiphy, 5457 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5458 bss_conf->twt_protected = true; 5459 else 5460 bss_conf->twt_protected = false; 5461 5462 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5463 link_sta, elems); 5464 5465 if (elems->eht_operation && elems->eht_cap && 5466 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5467 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5468 elems->he_cap, 5469 elems->he_cap_len, 5470 elems->eht_cap, 5471 elems->eht_cap_len, 5472 link_sta); 5473 5474 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5475 bss_conf->epcs_support = bss_conf->eht_support && 5476 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5477 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5478 5479 /* EPCS might be already enabled but a new added link 5480 * does not support EPCS. This should not really happen 5481 * in practice. 5482 */ 5483 if (sdata->u.mgd.epcs.enabled && 5484 !bss_conf->epcs_support) 5485 ieee80211_epcs_teardown(sdata); 5486 } else { 5487 bss_conf->eht_support = false; 5488 bss_conf->epcs_support = false; 5489 } 5490 } else { 5491 bss_conf->he_support = false; 5492 bss_conf->twt_requester = false; 5493 bss_conf->twt_protected = false; 5494 bss_conf->eht_support = false; 5495 bss_conf->epcs_support = false; 5496 } 5497 5498 if (elems->s1g_oper && 5499 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5500 elems->s1g_capab) 5501 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5502 link_sta); 5503 5504 bss_conf->twt_broadcast = 5505 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5506 5507 if (bss_conf->he_support) { 5508 bss_conf->he_bss_color.color = 5509 le32_get_bits(elems->he_operation->he_oper_params, 5510 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5511 bss_conf->he_bss_color.partial = 5512 le32_get_bits(elems->he_operation->he_oper_params, 5513 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5514 bss_conf->he_bss_color.enabled = 5515 !le32_get_bits(elems->he_operation->he_oper_params, 5516 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5517 5518 if (bss_conf->he_bss_color.enabled) 5519 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5520 5521 bss_conf->htc_trig_based_pkt_ext = 5522 le32_get_bits(elems->he_operation->he_oper_params, 5523 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5524 bss_conf->frame_time_rts_th = 5525 le32_get_bits(elems->he_operation->he_oper_params, 5526 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5527 5528 bss_conf->uora_exists = !!elems->uora_element; 5529 if (elems->uora_element) 5530 bss_conf->uora_ocw_range = elems->uora_element[0]; 5531 5532 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5533 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5534 /* TODO: OPEN: what happens if BSS color disable is set? */ 5535 } 5536 5537 if (cbss->transmitted_bss) { 5538 bss_conf->nontransmitted = true; 5539 ether_addr_copy(bss_conf->transmitter_bssid, 5540 cbss->transmitted_bss->bssid); 5541 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5542 bss_conf->bssid_index = cbss->bssid_index; 5543 } 5544 5545 /* 5546 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5547 * in their association response, so ignore that data for our own 5548 * configuration. If it changed since the last beacon, we'll get the 5549 * next beacon and update then. 5550 */ 5551 5552 /* 5553 * If an operating mode notification IE is present, override the 5554 * NSS calculation (that would be done in rate_control_rate_init()) 5555 * and use the # of streams from that element. 5556 */ 5557 if (elems->opmode_notif && 5558 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5559 u8 nss; 5560 5561 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5562 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5563 nss += 1; 5564 link_sta->pub->rx_nss = nss; 5565 } 5566 5567 /* 5568 * Always handle WMM once after association regardless 5569 * of the first value the AP uses. Setting -1 here has 5570 * that effect because the AP values is an unsigned 5571 * 4-bit value. 5572 */ 5573 link->u.mgd.wmm_last_param_set = -1; 5574 link->u.mgd.mu_edca_last_param_set = -1; 5575 5576 if (link->u.mgd.disable_wmm_tracking) { 5577 ieee80211_set_wmm_default(link, false, false); 5578 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5579 elems->wmm_param_len, 5580 elems->mu_edca_param_set)) { 5581 /* still enable QoS since we might have HT/VHT */ 5582 ieee80211_set_wmm_default(link, false, true); 5583 /* disable WMM tracking in this case to disable 5584 * tracking WMM parameter changes in the beacon if 5585 * the parameters weren't actually valid. Doing so 5586 * avoids changing parameters very strangely when 5587 * the AP is going back and forth between valid and 5588 * invalid parameters. 5589 */ 5590 link->u.mgd.disable_wmm_tracking = true; 5591 } 5592 5593 if (elems->max_idle_period_ie) { 5594 bss_conf->max_idle_period = 5595 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5596 bss_conf->protected_keep_alive = 5597 !!(elems->max_idle_period_ie->idle_options & 5598 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5599 *changed |= BSS_CHANGED_KEEP_ALIVE; 5600 } else { 5601 bss_conf->max_idle_period = 0; 5602 bss_conf->protected_keep_alive = false; 5603 } 5604 5605 /* set assoc capability (AID was already set earlier), 5606 * ieee80211_set_associated() will tell the driver */ 5607 bss_conf->assoc_capability = capab_info; 5608 5609 ret = true; 5610 out: 5611 kfree(elems); 5612 kfree(bss_ies); 5613 return ret; 5614 } 5615 5616 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5617 struct sta_info *sta, 5618 struct link_sta_info *link_sta, 5619 struct cfg80211_bss *cbss) 5620 { 5621 struct ieee80211_sub_if_data *sdata = link->sdata; 5622 struct ieee80211_local *local = sdata->local; 5623 struct ieee80211_bss *bss = (void *)cbss->priv; 5624 u32 rates = 0, basic_rates = 0; 5625 bool have_higher_than_11mbit = false; 5626 int min_rate = INT_MAX, min_rate_index = -1; 5627 struct ieee80211_supported_band *sband; 5628 5629 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5630 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5631 5632 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5633 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5634 ieee80211_s1g_sta_rate_init(sta); 5635 return 0; 5636 } 5637 5638 sband = local->hw.wiphy->bands[cbss->channel->band]; 5639 5640 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5641 NULL, 0, 5642 &rates, &basic_rates, NULL, 5643 &have_higher_than_11mbit, 5644 &min_rate, &min_rate_index); 5645 5646 /* 5647 * This used to be a workaround for basic rates missing 5648 * in the association response frame. Now that we no 5649 * longer use the basic rates from there, it probably 5650 * doesn't happen any more, but keep the workaround so 5651 * in case some *other* APs are buggy in different ways 5652 * we can connect -- with a warning. 5653 * Allow this workaround only in case the AP provided at least 5654 * one rate. 5655 */ 5656 if (min_rate_index < 0) { 5657 link_info(link, "No legacy rates in association response\n"); 5658 return -EINVAL; 5659 } else if (!basic_rates) { 5660 link_info(link, "No basic rates, using min rate instead\n"); 5661 basic_rates = BIT(min_rate_index); 5662 } 5663 5664 if (rates) 5665 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5666 else 5667 link_info(link, "No rates found, keeping mandatory only\n"); 5668 5669 link->conf->basic_rates = basic_rates; 5670 5671 /* cf. IEEE 802.11 9.2.12 */ 5672 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5673 have_higher_than_11mbit; 5674 5675 return 0; 5676 } 5677 5678 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5679 struct cfg80211_bss *cbss) 5680 { 5681 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5682 const struct element *ht_cap_elem, *vht_cap_elem; 5683 const struct cfg80211_bss_ies *ies; 5684 const struct ieee80211_ht_cap *ht_cap; 5685 const struct ieee80211_vht_cap *vht_cap; 5686 const struct ieee80211_he_cap_elem *he_cap; 5687 const struct element *he_cap_elem; 5688 u16 mcs_80_map, mcs_160_map; 5689 int i, mcs_nss_size; 5690 bool support_160; 5691 u8 chains = 1; 5692 5693 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5694 return chains; 5695 5696 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5697 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5698 ht_cap = (void *)ht_cap_elem->data; 5699 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5700 /* 5701 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5702 * "Tx Unequal Modulation Supported" fields. 5703 */ 5704 } 5705 5706 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5707 return chains; 5708 5709 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5710 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5711 u8 nss; 5712 u16 tx_mcs_map; 5713 5714 vht_cap = (void *)vht_cap_elem->data; 5715 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5716 for (nss = 8; nss > 0; nss--) { 5717 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5718 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5719 break; 5720 } 5721 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5722 chains = max(chains, nss); 5723 } 5724 5725 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5726 return chains; 5727 5728 ies = rcu_dereference(cbss->ies); 5729 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5730 ies->data, ies->len); 5731 5732 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5733 return chains; 5734 5735 /* skip one byte ext_tag_id */ 5736 he_cap = (void *)(he_cap_elem->data + 1); 5737 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5738 5739 /* invalid HE IE */ 5740 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5741 return chains; 5742 5743 /* mcs_nss is right after he_cap info */ 5744 he_mcs_nss_supp = (void *)(he_cap + 1); 5745 5746 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5747 5748 for (i = 7; i >= 0; i--) { 5749 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5750 5751 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5752 chains = max_t(u8, chains, i + 1); 5753 break; 5754 } 5755 } 5756 5757 support_160 = he_cap->phy_cap_info[0] & 5758 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5759 5760 if (!support_160) 5761 return chains; 5762 5763 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5764 for (i = 7; i >= 0; i--) { 5765 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5766 5767 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5768 chains = max_t(u8, chains, i + 1); 5769 break; 5770 } 5771 } 5772 5773 return chains; 5774 } 5775 5776 static void 5777 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5778 struct ieee80211_supported_band *sband, 5779 struct cfg80211_assoc_request *req, 5780 bool wmm_used, int link_id, 5781 struct ieee80211_conn_settings *conn) 5782 { 5783 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5784 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5785 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5786 const struct ieee80211_sta_he_cap *he_cap; 5787 const struct ieee80211_sta_eht_cap *eht_cap; 5788 struct ieee80211_sta_vht_cap vht_cap; 5789 5790 if (sband->band == NL80211_BAND_S1GHZ) { 5791 conn->mode = IEEE80211_CONN_MODE_S1G; 5792 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5793 mlme_dbg(sdata, "operating as S1G STA\n"); 5794 return; 5795 } 5796 5797 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5798 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5799 5800 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5801 5802 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5803 mlme_link_id_dbg(sdata, link_id, 5804 "HT disabled by flag, limiting to legacy\n"); 5805 goto out; 5806 } 5807 5808 if (!wmm_used) { 5809 mlme_link_id_dbg(sdata, link_id, 5810 "WMM/QoS not supported, limiting to legacy\n"); 5811 goto out; 5812 } 5813 5814 if (req) { 5815 unsigned int i; 5816 5817 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5818 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5819 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5820 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5821 netdev_info(sdata->dev, 5822 "WEP/TKIP use, limiting to legacy\n"); 5823 goto out; 5824 } 5825 } 5826 } 5827 5828 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5829 mlme_link_id_dbg(sdata, link_id, 5830 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5831 goto out; 5832 } 5833 5834 /* HT is fine */ 5835 conn->mode = IEEE80211_CONN_MODE_HT; 5836 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5837 IEEE80211_CONN_BW_LIMIT_40 : 5838 IEEE80211_CONN_BW_LIMIT_20; 5839 5840 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5841 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5842 5843 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5844 mlme_link_id_dbg(sdata, link_id, 5845 "VHT disabled by flag, limiting to HT\n"); 5846 goto out; 5847 } 5848 5849 if (vht_cap.vht_supported && is_5ghz) { 5850 bool have_80mhz = false; 5851 unsigned int i; 5852 5853 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5854 mlme_link_id_dbg(sdata, link_id, 5855 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5856 goto out; 5857 } 5858 5859 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5860 for (i = 0; i < sband->n_channels; i++) { 5861 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5862 IEEE80211_CHAN_NO_80MHZ)) 5863 continue; 5864 5865 have_80mhz = true; 5866 break; 5867 } 5868 5869 if (!have_80mhz) { 5870 mlme_link_id_dbg(sdata, link_id, 5871 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5872 goto out; 5873 } 5874 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5875 mlme_link_id_dbg(sdata, link_id, 5876 "no VHT support on 5 GHz, limiting to HT\n"); 5877 goto out; 5878 } 5879 5880 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5881 if (sband->band != NL80211_BAND_2GHZ) { 5882 conn->mode = IEEE80211_CONN_MODE_VHT; 5883 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5884 } 5885 5886 if (is_5ghz && 5887 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5888 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5889 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5890 mlme_link_id_dbg(sdata, link_id, 5891 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5892 } 5893 5894 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5895 mlme_link_id_dbg(sdata, link_id, 5896 "HE disabled by flag, limiting to HT/VHT\n"); 5897 goto out; 5898 } 5899 5900 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5901 if (!he_cap) { 5902 WARN_ON(is_6ghz); 5903 mlme_link_id_dbg(sdata, link_id, 5904 "no HE support, limiting to HT/VHT\n"); 5905 goto out; 5906 } 5907 5908 /* so we have HE */ 5909 conn->mode = IEEE80211_CONN_MODE_HE; 5910 5911 /* check bandwidth */ 5912 switch (sband->band) { 5913 default: 5914 case NL80211_BAND_2GHZ: 5915 if (he_cap->he_cap_elem.phy_cap_info[0] & 5916 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5917 break; 5918 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5919 mlme_link_id_dbg(sdata, link_id, 5920 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5921 break; 5922 case NL80211_BAND_5GHZ: 5923 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5924 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5925 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5926 mlme_link_id_dbg(sdata, link_id, 5927 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5928 break; 5929 } 5930 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5931 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5932 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5933 conn->bw_limit, 5934 IEEE80211_CONN_BW_LIMIT_80); 5935 mlme_link_id_dbg(sdata, link_id, 5936 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5937 } 5938 break; 5939 case NL80211_BAND_6GHZ: 5940 if (he_cap->he_cap_elem.phy_cap_info[0] & 5941 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5942 break; 5943 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5944 conn->bw_limit, 5945 IEEE80211_CONN_BW_LIMIT_80); 5946 mlme_link_id_dbg(sdata, link_id, 5947 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5948 break; 5949 } 5950 5951 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5952 mlme_link_id_dbg(sdata, link_id, 5953 "EHT disabled by flag, limiting to HE\n"); 5954 goto out; 5955 } 5956 5957 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5958 if (!eht_cap) { 5959 mlme_link_id_dbg(sdata, link_id, 5960 "no EHT support, limiting to HE\n"); 5961 goto out; 5962 } 5963 5964 /* we have EHT */ 5965 5966 conn->mode = IEEE80211_CONN_MODE_EHT; 5967 5968 /* check bandwidth */ 5969 if (is_6ghz && 5970 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5971 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5972 else if (is_6ghz) 5973 mlme_link_id_dbg(sdata, link_id, 5974 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5975 5976 out: 5977 mlme_link_id_dbg(sdata, link_id, 5978 "determined local STA to be %s, BW limited to %d MHz\n", 5979 ieee80211_conn_mode_str(conn->mode), 5980 20 * (1 << conn->bw_limit)); 5981 } 5982 5983 static void 5984 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5985 struct ieee80211_supported_band *sband, 5986 struct cfg80211_auth_request *req, 5987 bool wmm_used, 5988 struct ieee80211_conn_settings *conn) 5989 { 5990 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5991 req->link_id > 0 ? req->link_id : 0, 5992 conn); 5993 } 5994 5995 static void 5996 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5997 struct ieee80211_supported_band *sband, 5998 struct cfg80211_assoc_request *req, 5999 bool wmm_used, int link_id, 6000 struct ieee80211_conn_settings *conn) 6001 { 6002 struct ieee80211_conn_settings tmp; 6003 6004 WARN_ON(!req); 6005 6006 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6007 &tmp); 6008 6009 conn->mode = min_t(enum ieee80211_conn_mode, 6010 conn->mode, tmp.mode); 6011 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6012 conn->bw_limit, tmp.bw_limit); 6013 } 6014 6015 static enum ieee80211_ap_reg_power 6016 ieee80211_ap_power_type(u8 control) 6017 { 6018 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 6019 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 6020 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 6021 return IEEE80211_REG_LPI_AP; 6022 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 6023 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 6024 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD: 6025 return IEEE80211_REG_SP_AP; 6026 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 6027 return IEEE80211_REG_VLP_AP; 6028 default: 6029 return IEEE80211_REG_UNSET_AP; 6030 } 6031 } 6032 6033 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6034 struct ieee80211_link_data *link, 6035 int link_id, 6036 struct cfg80211_bss *cbss, bool mlo, 6037 struct ieee80211_conn_settings *conn, 6038 unsigned long *userspace_selectors) 6039 { 6040 struct ieee80211_local *local = sdata->local; 6041 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6042 struct ieee80211_chan_req chanreq = {}; 6043 struct cfg80211_chan_def ap_chandef; 6044 struct ieee802_11_elems *elems; 6045 int ret; 6046 6047 lockdep_assert_wiphy(local->hw.wiphy); 6048 6049 rcu_read_lock(); 6050 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6051 &chanreq, &ap_chandef, 6052 userspace_selectors); 6053 6054 if (IS_ERR(elems)) { 6055 rcu_read_unlock(); 6056 return PTR_ERR(elems); 6057 } 6058 6059 if (mlo && !elems->ml_basic) { 6060 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6061 rcu_read_unlock(); 6062 kfree(elems); 6063 return -EINVAL; 6064 } 6065 6066 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6067 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6068 6069 if (elems->pwr_constr_elem) 6070 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6071 6072 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6073 if (he_6ghz_oper) 6074 link->conf->power_type = 6075 ieee80211_ap_power_type(he_6ghz_oper->control); 6076 else 6077 link_info(link, 6078 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6079 cbss->channel->center_freq); 6080 6081 link->conf->tpe = elems->tpe; 6082 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6083 &chanreq.oper); 6084 } 6085 rcu_read_unlock(); 6086 /* the element data was RCU protected so no longer valid anyway */ 6087 kfree(elems); 6088 elems = NULL; 6089 6090 if (!link) 6091 return 0; 6092 6093 rcu_read_lock(); 6094 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6095 local->rx_chains); 6096 rcu_read_unlock(); 6097 6098 /* 6099 * If this fails (possibly due to channel context sharing 6100 * on incompatible channels, e.g. 80+80 and 160 sharing the 6101 * same control channel) try to use a smaller bandwidth. 6102 */ 6103 ret = ieee80211_link_use_channel(link, &chanreq, 6104 IEEE80211_CHANCTX_SHARED); 6105 6106 /* don't downgrade for 5 and 10 MHz channels, though. */ 6107 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6108 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6109 return ret; 6110 6111 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6112 ieee80211_chanreq_downgrade(&chanreq, conn); 6113 6114 ret = ieee80211_link_use_channel(link, &chanreq, 6115 IEEE80211_CHANCTX_SHARED); 6116 } 6117 6118 return ret; 6119 } 6120 6121 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6122 u8 *dtim_count, u8 *dtim_period) 6123 { 6124 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6125 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6126 ies->len); 6127 const struct ieee80211_tim_ie *tim = NULL; 6128 const struct ieee80211_bssid_index *idx; 6129 bool valid = tim_ie && tim_ie[1] >= 2; 6130 6131 if (valid) 6132 tim = (void *)(tim_ie + 2); 6133 6134 if (dtim_count) 6135 *dtim_count = valid ? tim->dtim_count : 0; 6136 6137 if (dtim_period) 6138 *dtim_period = valid ? tim->dtim_period : 0; 6139 6140 /* Check if value is overridden by non-transmitted profile */ 6141 if (!idx_ie || idx_ie[1] < 3) 6142 return valid; 6143 6144 idx = (void *)(idx_ie + 2); 6145 6146 if (dtim_count) 6147 *dtim_count = idx->dtim_count; 6148 6149 if (dtim_period) 6150 *dtim_period = idx->dtim_period; 6151 6152 return true; 6153 } 6154 6155 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6156 struct ieee80211_mgmt *mgmt, 6157 struct ieee802_11_elems *elems, 6158 const u8 *elem_start, unsigned int elem_len) 6159 { 6160 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6161 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6162 struct ieee80211_local *local = sdata->local; 6163 unsigned int link_id; 6164 struct sta_info *sta; 6165 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6166 u16 valid_links = 0, dormant_links = 0; 6167 int err; 6168 6169 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6170 /* 6171 * station info was already allocated and inserted before 6172 * the association and should be available to us 6173 */ 6174 sta = sta_info_get(sdata, assoc_data->ap_addr); 6175 if (WARN_ON(!sta)) 6176 goto out_err; 6177 6178 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6179 6180 if (ieee80211_vif_is_mld(&sdata->vif)) { 6181 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6182 if (!assoc_data->link[link_id].bss) 6183 continue; 6184 6185 valid_links |= BIT(link_id); 6186 if (assoc_data->link[link_id].disabled) 6187 dormant_links |= BIT(link_id); 6188 6189 if (link_id != assoc_data->assoc_link_id) { 6190 err = ieee80211_sta_allocate_link(sta, link_id); 6191 if (err) 6192 goto out_err; 6193 } 6194 } 6195 6196 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6197 } 6198 6199 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6200 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6201 struct ieee80211_link_data *link; 6202 struct link_sta_info *link_sta; 6203 6204 if (!cbss) 6205 continue; 6206 6207 link = sdata_dereference(sdata->link[link_id], sdata); 6208 if (WARN_ON(!link)) 6209 goto out_err; 6210 6211 if (ieee80211_vif_is_mld(&sdata->vif)) 6212 link_info(link, 6213 "local address %pM, AP link address %pM%s\n", 6214 link->conf->addr, 6215 assoc_data->link[link_id].bss->bssid, 6216 link_id == assoc_data->assoc_link_id ? 6217 " (assoc)" : ""); 6218 6219 link_sta = rcu_dereference_protected(sta->link[link_id], 6220 lockdep_is_held(&local->hw.wiphy->mtx)); 6221 if (WARN_ON(!link_sta)) 6222 goto out_err; 6223 6224 if (!link->u.mgd.have_beacon) { 6225 const struct cfg80211_bss_ies *ies; 6226 6227 rcu_read_lock(); 6228 ies = rcu_dereference(cbss->beacon_ies); 6229 if (ies) 6230 link->u.mgd.have_beacon = true; 6231 else 6232 ies = rcu_dereference(cbss->ies); 6233 ieee80211_get_dtim(ies, 6234 &link->conf->sync_dtim_count, 6235 &link->u.mgd.dtim_period); 6236 link->conf->beacon_int = cbss->beacon_interval; 6237 rcu_read_unlock(); 6238 } 6239 6240 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6241 6242 if (link_id != assoc_data->assoc_link_id) { 6243 link->u.mgd.conn = assoc_data->link[link_id].conn; 6244 6245 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6246 true, &link->u.mgd.conn, 6247 sdata->u.mgd.userspace_selectors); 6248 if (err) { 6249 link_info(link, "prep_channel failed\n"); 6250 goto out_err; 6251 } 6252 } 6253 6254 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6255 assoc_data->link[link_id].bss); 6256 if (err) 6257 goto out_err; 6258 6259 if (!ieee80211_assoc_config_link(link, link_sta, 6260 assoc_data->link[link_id].bss, 6261 mgmt, elem_start, elem_len, 6262 &changed[link_id])) 6263 goto out_err; 6264 6265 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6266 valid_links &= ~BIT(link_id); 6267 ieee80211_sta_remove_link(sta, link_id); 6268 continue; 6269 } 6270 6271 if (link_id != assoc_data->assoc_link_id) { 6272 err = ieee80211_sta_activate_link(sta, link_id); 6273 if (err) 6274 goto out_err; 6275 } 6276 } 6277 6278 /* links might have changed due to rejected ones, set them again */ 6279 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6280 6281 rate_control_rate_init_all_links(sta); 6282 6283 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6284 set_sta_flag(sta, WLAN_STA_MFP); 6285 sta->sta.mfp = true; 6286 } else { 6287 sta->sta.mfp = false; 6288 } 6289 6290 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6291 elems->ext_capab_len); 6292 6293 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6294 local->hw.queues >= IEEE80211_NUM_ACS; 6295 6296 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6297 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6298 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6299 if (err) { 6300 sdata_info(sdata, 6301 "failed to move station %pM to desired state\n", 6302 sta->sta.addr); 6303 WARN_ON(__sta_info_destroy(sta)); 6304 goto out_err; 6305 } 6306 6307 if (sdata->wdev.use_4addr) 6308 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6309 6310 ieee80211_set_associated(sdata, assoc_data, changed); 6311 6312 /* 6313 * If we're using 4-addr mode, let the AP know that we're 6314 * doing so, so that it can create the STA VLAN on its side 6315 */ 6316 if (ifmgd->use_4addr) 6317 ieee80211_send_4addr_nullfunc(local, sdata); 6318 6319 /* 6320 * Start timer to probe the connection to the AP now. 6321 * Also start the timer that will detect beacon loss. 6322 */ 6323 ieee80211_sta_reset_beacon_monitor(sdata); 6324 ieee80211_sta_reset_conn_monitor(sdata); 6325 6326 return true; 6327 out_err: 6328 eth_zero_addr(sdata->vif.cfg.ap_addr); 6329 return false; 6330 } 6331 6332 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6333 struct ieee80211_mgmt *mgmt, 6334 size_t len) 6335 { 6336 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6337 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6338 u16 capab_info, status_code, aid; 6339 struct ieee80211_elems_parse_params parse_params = { 6340 .bss = NULL, 6341 .link_id = -1, 6342 .from_ap = true, 6343 }; 6344 struct ieee802_11_elems *elems; 6345 int ac; 6346 const u8 *elem_start; 6347 unsigned int elem_len; 6348 bool reassoc; 6349 struct ieee80211_event event = { 6350 .type = MLME_EVENT, 6351 .u.mlme.data = ASSOC_EVENT, 6352 }; 6353 struct ieee80211_prep_tx_info info = {}; 6354 struct cfg80211_rx_assoc_resp_data resp = { 6355 .uapsd_queues = -1, 6356 }; 6357 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6358 unsigned int link_id; 6359 6360 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6361 6362 if (!assoc_data) 6363 return; 6364 6365 info.link_id = assoc_data->assoc_link_id; 6366 6367 parse_params.mode = 6368 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6369 6370 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6371 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6372 return; 6373 6374 /* 6375 * AssocResp and ReassocResp have identical structure, so process both 6376 * of them in this function. 6377 */ 6378 6379 if (len < 24 + 6) 6380 return; 6381 6382 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6383 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6384 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6385 if (assoc_data->s1g) 6386 elem_start = mgmt->u.s1g_assoc_resp.variable; 6387 else 6388 elem_start = mgmt->u.assoc_resp.variable; 6389 6390 /* 6391 * Note: this may not be perfect, AP might misbehave - if 6392 * anyone needs to rely on perfect complete notification 6393 * with the exact right subtype, then we need to track what 6394 * we actually transmitted. 6395 */ 6396 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6397 IEEE80211_STYPE_ASSOC_REQ; 6398 6399 if (assoc_data->fils_kek_len && 6400 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6401 return; 6402 6403 elem_len = len - (elem_start - (u8 *)mgmt); 6404 parse_params.start = elem_start; 6405 parse_params.len = elem_len; 6406 elems = ieee802_11_parse_elems_full(&parse_params); 6407 if (!elems) 6408 goto notify_driver; 6409 6410 if (elems->aid_resp) 6411 aid = le16_to_cpu(elems->aid_resp->aid); 6412 else if (assoc_data->s1g) 6413 aid = 0; /* TODO */ 6414 else 6415 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6416 6417 /* 6418 * The 5 MSB of the AID field are reserved 6419 * (802.11-2016 9.4.1.8 AID field) 6420 */ 6421 aid &= 0x7ff; 6422 6423 sdata_info(sdata, 6424 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6425 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6426 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6427 6428 ifmgd->broken_ap = false; 6429 6430 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6431 elems->timeout_int && 6432 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6433 u32 tu, ms; 6434 6435 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6436 le32_to_cpu(elems->timeout_int->value)); 6437 6438 tu = le32_to_cpu(elems->timeout_int->value); 6439 ms = tu * 1024 / 1000; 6440 sdata_info(sdata, 6441 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6442 assoc_data->ap_addr, tu, ms); 6443 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6444 assoc_data->timeout_started = true; 6445 assoc_data->comeback = true; 6446 if (ms > IEEE80211_ASSOC_TIMEOUT) 6447 run_again(sdata, assoc_data->timeout); 6448 goto notify_driver; 6449 } 6450 6451 if (status_code != WLAN_STATUS_SUCCESS) { 6452 sdata_info(sdata, "%pM denied association (code=%d)\n", 6453 assoc_data->ap_addr, status_code); 6454 event.u.mlme.status = MLME_DENIED; 6455 event.u.mlme.reason = status_code; 6456 drv_event_callback(sdata->local, sdata, &event); 6457 } else { 6458 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6459 sdata_info(sdata, 6460 "invalid AID value %d (out of range), turn off PS\n", 6461 aid); 6462 aid = 0; 6463 ifmgd->broken_ap = true; 6464 } 6465 6466 if (ieee80211_vif_is_mld(&sdata->vif)) { 6467 struct ieee80211_mle_basic_common_info *common; 6468 6469 if (!elems->ml_basic) { 6470 sdata_info(sdata, 6471 "MLO association with %pM but no (basic) multi-link element in response!\n", 6472 assoc_data->ap_addr); 6473 goto abandon_assoc; 6474 } 6475 6476 common = (void *)elems->ml_basic->variable; 6477 6478 if (memcmp(assoc_data->ap_addr, 6479 common->mld_mac_addr, ETH_ALEN)) { 6480 sdata_info(sdata, 6481 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6482 common->mld_mac_addr, 6483 assoc_data->ap_addr); 6484 goto abandon_assoc; 6485 } 6486 6487 sdata->vif.cfg.eml_cap = 6488 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6489 sdata->vif.cfg.eml_med_sync_delay = 6490 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6491 sdata->vif.cfg.mld_capa_op = 6492 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6493 } 6494 6495 sdata->vif.cfg.aid = aid; 6496 6497 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6498 elem_start, elem_len)) { 6499 /* oops -- internal error -- send timeout for now */ 6500 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6501 goto notify_driver; 6502 } 6503 event.u.mlme.status = MLME_SUCCESS; 6504 drv_event_callback(sdata->local, sdata, &event); 6505 sdata_info(sdata, "associated\n"); 6506 6507 info.success = 1; 6508 } 6509 6510 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6511 struct ieee80211_link_data *link; 6512 6513 if (!assoc_data->link[link_id].bss) 6514 continue; 6515 6516 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6517 ether_addr_copy(resp.links[link_id].addr, 6518 assoc_data->link[link_id].addr); 6519 resp.links[link_id].status = assoc_data->link[link_id].status; 6520 6521 link = sdata_dereference(sdata->link[link_id], sdata); 6522 if (!link) 6523 continue; 6524 6525 /* get uapsd queues configuration - same for all links */ 6526 resp.uapsd_queues = 0; 6527 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6528 if (link->tx_conf[ac].uapsd) 6529 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6530 } 6531 6532 if (ieee80211_vif_is_mld(&sdata->vif)) { 6533 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6534 resp.ap_mld_addr = ap_mld_addr; 6535 } 6536 6537 ieee80211_destroy_assoc_data(sdata, 6538 status_code == WLAN_STATUS_SUCCESS ? 6539 ASSOC_SUCCESS : 6540 ASSOC_REJECTED); 6541 6542 resp.buf = (u8 *)mgmt; 6543 resp.len = len; 6544 resp.req_ies = ifmgd->assoc_req_ies; 6545 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6546 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6547 notify_driver: 6548 drv_mgd_complete_tx(sdata->local, sdata, &info); 6549 kfree(elems); 6550 return; 6551 abandon_assoc: 6552 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6553 goto notify_driver; 6554 } 6555 6556 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6557 struct ieee80211_mgmt *mgmt, size_t len, 6558 struct ieee80211_rx_status *rx_status) 6559 { 6560 struct ieee80211_sub_if_data *sdata = link->sdata; 6561 struct ieee80211_local *local = sdata->local; 6562 struct ieee80211_bss *bss; 6563 struct ieee80211_channel *channel; 6564 6565 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6566 6567 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6568 ieee80211_rx_status_to_khz(rx_status)); 6569 if (!channel) 6570 return; 6571 6572 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6573 if (bss) { 6574 link->conf->beacon_rate = bss->beacon_rate; 6575 ieee80211_rx_bss_put(local, bss); 6576 } 6577 } 6578 6579 6580 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6581 struct sk_buff *skb) 6582 { 6583 struct ieee80211_sub_if_data *sdata = link->sdata; 6584 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6585 struct ieee80211_if_managed *ifmgd; 6586 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6587 struct ieee80211_channel *channel; 6588 size_t baselen, len = skb->len; 6589 6590 ifmgd = &sdata->u.mgd; 6591 6592 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6593 6594 /* 6595 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6596 * "If a 6 GHz AP receives a Probe Request frame and responds with 6597 * a Probe Response frame [..], the Address 1 field of the Probe 6598 * Response frame shall be set to the broadcast address [..]" 6599 * So, on 6GHz band we should also accept broadcast responses. 6600 */ 6601 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6602 rx_status->freq); 6603 if (!channel) 6604 return; 6605 6606 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6607 (channel->band != NL80211_BAND_6GHZ || 6608 !is_broadcast_ether_addr(mgmt->da))) 6609 return; /* ignore ProbeResp to foreign address */ 6610 6611 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6612 if (baselen > len) 6613 return; 6614 6615 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6616 6617 if (ifmgd->associated && 6618 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6619 ieee80211_reset_ap_probe(sdata); 6620 } 6621 6622 /* 6623 * This is the canonical list of information elements we care about, 6624 * the filter code also gives us all changes to the Microsoft OUI 6625 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6626 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6627 * changes to requested client power. 6628 * 6629 * We implement beacon filtering in software since that means we can 6630 * avoid processing the frame here and in cfg80211, and userspace 6631 * will not be able to tell whether the hardware supports it or not. 6632 * 6633 * XXX: This list needs to be dynamic -- userspace needs to be able to 6634 * add items it requires. It also needs to be able to tell us to 6635 * look out for other vendor IEs. 6636 */ 6637 static const u64 care_about_ies = 6638 (1ULL << WLAN_EID_COUNTRY) | 6639 (1ULL << WLAN_EID_ERP_INFO) | 6640 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6641 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6642 (1ULL << WLAN_EID_HT_CAPABILITY) | 6643 (1ULL << WLAN_EID_HT_OPERATION) | 6644 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6645 6646 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6647 struct ieee80211_if_managed *ifmgd, 6648 struct ieee80211_bss_conf *bss_conf, 6649 struct ieee80211_local *local, 6650 struct ieee80211_rx_status *rx_status) 6651 { 6652 struct ieee80211_sub_if_data *sdata = link->sdata; 6653 6654 /* Track average RSSI from the Beacon frames of the current AP */ 6655 6656 if (!link->u.mgd.tracking_signal_avg) { 6657 link->u.mgd.tracking_signal_avg = true; 6658 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6659 link->u.mgd.last_cqm_event_signal = 0; 6660 link->u.mgd.count_beacon_signal = 1; 6661 link->u.mgd.last_ave_beacon_signal = 0; 6662 } else { 6663 link->u.mgd.count_beacon_signal++; 6664 } 6665 6666 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6667 -rx_status->signal); 6668 6669 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6670 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6671 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6672 int last_sig = link->u.mgd.last_ave_beacon_signal; 6673 struct ieee80211_event event = { 6674 .type = RSSI_EVENT, 6675 }; 6676 6677 /* 6678 * if signal crosses either of the boundaries, invoke callback 6679 * with appropriate parameters 6680 */ 6681 if (sig > ifmgd->rssi_max_thold && 6682 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6683 link->u.mgd.last_ave_beacon_signal = sig; 6684 event.u.rssi.data = RSSI_EVENT_HIGH; 6685 drv_event_callback(local, sdata, &event); 6686 } else if (sig < ifmgd->rssi_min_thold && 6687 (last_sig >= ifmgd->rssi_max_thold || 6688 last_sig == 0)) { 6689 link->u.mgd.last_ave_beacon_signal = sig; 6690 event.u.rssi.data = RSSI_EVENT_LOW; 6691 drv_event_callback(local, sdata, &event); 6692 } 6693 } 6694 6695 if (bss_conf->cqm_rssi_thold && 6696 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6697 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6698 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6699 int last_event = link->u.mgd.last_cqm_event_signal; 6700 int thold = bss_conf->cqm_rssi_thold; 6701 int hyst = bss_conf->cqm_rssi_hyst; 6702 6703 if (sig < thold && 6704 (last_event == 0 || sig < last_event - hyst)) { 6705 link->u.mgd.last_cqm_event_signal = sig; 6706 ieee80211_cqm_rssi_notify( 6707 &sdata->vif, 6708 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6709 sig, GFP_KERNEL); 6710 } else if (sig > thold && 6711 (last_event == 0 || sig > last_event + hyst)) { 6712 link->u.mgd.last_cqm_event_signal = sig; 6713 ieee80211_cqm_rssi_notify( 6714 &sdata->vif, 6715 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6716 sig, GFP_KERNEL); 6717 } 6718 } 6719 6720 if (bss_conf->cqm_rssi_low && 6721 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6722 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6723 int last_event = link->u.mgd.last_cqm_event_signal; 6724 int low = bss_conf->cqm_rssi_low; 6725 int high = bss_conf->cqm_rssi_high; 6726 6727 if (sig < low && 6728 (last_event == 0 || last_event >= low)) { 6729 link->u.mgd.last_cqm_event_signal = sig; 6730 ieee80211_cqm_rssi_notify( 6731 &sdata->vif, 6732 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6733 sig, GFP_KERNEL); 6734 } else if (sig > high && 6735 (last_event == 0 || last_event <= high)) { 6736 link->u.mgd.last_cqm_event_signal = sig; 6737 ieee80211_cqm_rssi_notify( 6738 &sdata->vif, 6739 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6740 sig, GFP_KERNEL); 6741 } 6742 } 6743 } 6744 6745 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6746 struct cfg80211_bss *bss) 6747 { 6748 if (ether_addr_equal(tx_bssid, bss->bssid)) 6749 return true; 6750 if (!bss->transmitted_bss) 6751 return false; 6752 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6753 } 6754 6755 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6756 struct wiphy_work *work) 6757 { 6758 struct ieee80211_sub_if_data *sdata = 6759 container_of(work, struct ieee80211_sub_if_data, 6760 u.mgd.ml_reconf_work.work); 6761 u16 new_valid_links, new_active_links, new_dormant_links; 6762 int ret; 6763 6764 if (!sdata->u.mgd.removed_links) 6765 return; 6766 6767 sdata_info(sdata, 6768 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6769 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6770 6771 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6772 if (new_valid_links == sdata->vif.valid_links) 6773 return; 6774 6775 if (!new_valid_links || 6776 !(new_valid_links & ~sdata->vif.dormant_links)) { 6777 sdata_info(sdata, "No valid links after reconfiguration\n"); 6778 ret = -EINVAL; 6779 goto out; 6780 } 6781 6782 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6783 if (new_active_links != sdata->vif.active_links) { 6784 if (!new_active_links) 6785 new_active_links = 6786 BIT(ffs(new_valid_links & 6787 ~sdata->vif.dormant_links) - 1); 6788 6789 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6790 if (ret) { 6791 sdata_info(sdata, 6792 "Failed setting active links\n"); 6793 goto out; 6794 } 6795 } 6796 6797 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6798 6799 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6800 new_dormant_links); 6801 if (ret) 6802 sdata_info(sdata, "Failed setting valid links\n"); 6803 6804 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6805 6806 out: 6807 if (!ret) 6808 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6809 else 6810 __ieee80211_disconnect(sdata); 6811 6812 sdata->u.mgd.removed_links = 0; 6813 } 6814 6815 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6816 struct ieee802_11_elems *elems) 6817 { 6818 const struct element *sub; 6819 unsigned long removed_links = 0; 6820 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6821 u8 link_id; 6822 u32 delay; 6823 6824 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6825 return; 6826 6827 /* Directly parse the sub elements as the common information doesn't 6828 * hold any useful information. 6829 */ 6830 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6831 elems->ml_reconf_len) { 6832 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6833 u8 *pos = prof->variable; 6834 u16 control; 6835 6836 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6837 continue; 6838 6839 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6840 sub->datalen)) 6841 return; 6842 6843 control = le16_to_cpu(prof->control); 6844 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6845 6846 removed_links |= BIT(link_id); 6847 6848 /* the MAC address should not be included, but handle it */ 6849 if (control & 6850 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6851 pos += 6; 6852 6853 /* According to Draft P802.11be_D3.0, the control should 6854 * include the AP Removal Timer present. If the AP Removal Timer 6855 * is not present assume immediate removal. 6856 */ 6857 if (control & 6858 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6859 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6860 } 6861 6862 removed_links &= sdata->vif.valid_links; 6863 if (!removed_links) { 6864 /* In case the removal was cancelled, abort it */ 6865 if (sdata->u.mgd.removed_links) { 6866 sdata->u.mgd.removed_links = 0; 6867 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6868 &sdata->u.mgd.ml_reconf_work); 6869 } 6870 return; 6871 } 6872 6873 delay = 0; 6874 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6875 struct ieee80211_bss_conf *link_conf = 6876 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6877 u32 link_delay; 6878 6879 if (!link_conf) { 6880 removed_links &= ~BIT(link_id); 6881 continue; 6882 } 6883 6884 if (link_removal_timeout[link_id] < 1) 6885 link_delay = 0; 6886 else 6887 link_delay = link_conf->beacon_int * 6888 (link_removal_timeout[link_id] - 1); 6889 6890 if (!delay) 6891 delay = link_delay; 6892 else 6893 delay = min(delay, link_delay); 6894 } 6895 6896 sdata->u.mgd.removed_links = removed_links; 6897 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6898 &sdata->u.mgd.ml_reconf_work, 6899 TU_TO_JIFFIES(delay)); 6900 } 6901 6902 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6903 u16 active_links, u16 dormant_links, 6904 u16 suspended_links) 6905 { 6906 u64 changed = 0; 6907 int ret; 6908 6909 if (!active_links) { 6910 ret = -EINVAL; 6911 goto out; 6912 } 6913 6914 /* If there is an active negotiated TTLM, it should be discarded by 6915 * the new negotiated/advertised TTLM. 6916 */ 6917 if (sdata->vif.neg_ttlm.valid) { 6918 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6919 sdata->vif.suspended_links = 0; 6920 changed = BSS_CHANGED_MLD_TTLM; 6921 } 6922 6923 if (sdata->vif.active_links != active_links) { 6924 /* usable links are affected when active_links are changed, 6925 * so notify the driver about the status change 6926 */ 6927 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6928 active_links &= sdata->vif.active_links; 6929 if (!active_links) 6930 active_links = 6931 BIT(__ffs(sdata->vif.valid_links & 6932 ~dormant_links)); 6933 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6934 if (ret) { 6935 sdata_info(sdata, "Failed to set TTLM active links\n"); 6936 goto out; 6937 } 6938 } 6939 6940 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6941 dormant_links); 6942 if (ret) { 6943 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6944 goto out; 6945 } 6946 6947 sdata->vif.suspended_links = suspended_links; 6948 if (sdata->vif.suspended_links) 6949 changed |= BSS_CHANGED_MLD_TTLM; 6950 6951 ieee80211_vif_cfg_change_notify(sdata, changed); 6952 6953 out: 6954 if (ret) 6955 ieee80211_disconnect(&sdata->vif, false); 6956 6957 return ret; 6958 } 6959 6960 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6961 struct wiphy_work *work) 6962 { 6963 u16 new_active_links, new_dormant_links; 6964 struct ieee80211_sub_if_data *sdata = 6965 container_of(work, struct ieee80211_sub_if_data, 6966 u.mgd.ttlm_work.work); 6967 6968 new_active_links = sdata->u.mgd.ttlm_info.map & 6969 sdata->vif.valid_links; 6970 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6971 sdata->vif.valid_links; 6972 6973 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6974 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6975 0)) 6976 return; 6977 6978 sdata->u.mgd.ttlm_info.active = true; 6979 sdata->u.mgd.ttlm_info.switch_time = 0; 6980 } 6981 6982 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6983 { 6984 if (bm_size == 1) 6985 return *data; 6986 else 6987 return get_unaligned_le16(data); 6988 } 6989 6990 static int 6991 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6992 const struct ieee80211_ttlm_elem *ttlm, 6993 struct ieee80211_adv_ttlm_info *ttlm_info) 6994 { 6995 /* The element size was already validated in 6996 * ieee80211_tid_to_link_map_size_ok() 6997 */ 6998 u8 control, link_map_presence, map_size, tid; 6999 u8 *pos; 7000 7001 memset(ttlm_info, 0, sizeof(*ttlm_info)); 7002 pos = (void *)ttlm->optional; 7003 control = ttlm->control; 7004 7005 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 7006 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 7007 return 0; 7008 7009 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 7010 IEEE80211_TTLM_DIRECTION_BOTH) { 7011 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 7012 return -EINVAL; 7013 } 7014 7015 link_map_presence = *pos; 7016 pos++; 7017 7018 ttlm_info->switch_time = get_unaligned_le16(pos); 7019 7020 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 7021 * by 1. 7022 */ 7023 if (!ttlm_info->switch_time) 7024 ttlm_info->switch_time = 1; 7025 7026 pos += 2; 7027 7028 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 7029 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 7030 pos += 3; 7031 } 7032 7033 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7034 map_size = 1; 7035 else 7036 map_size = 2; 7037 7038 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 7039 * not advertise a TID-to-link mapping that does not map all TIDs to the 7040 * same link set, reject frame if not all links have mapping 7041 */ 7042 if (link_map_presence != 0xff) { 7043 sdata_info(sdata, 7044 "Invalid advertised T2L mapping presence indicator\n"); 7045 return -EINVAL; 7046 } 7047 7048 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7049 if (!ttlm_info->map) { 7050 sdata_info(sdata, 7051 "Invalid advertised T2L map for TID 0\n"); 7052 return -EINVAL; 7053 } 7054 7055 pos += map_size; 7056 7057 for (tid = 1; tid < 8; tid++) { 7058 u16 map = ieee80211_get_ttlm(map_size, pos); 7059 7060 if (map != ttlm_info->map) { 7061 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7062 tid); 7063 return -EINVAL; 7064 } 7065 7066 pos += map_size; 7067 } 7068 return 0; 7069 } 7070 7071 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7072 struct ieee802_11_elems *elems, 7073 u64 beacon_ts) 7074 { 7075 u8 i; 7076 int ret; 7077 7078 if (!ieee80211_vif_is_mld(&sdata->vif)) 7079 return; 7080 7081 if (!elems->ttlm_num) { 7082 if (sdata->u.mgd.ttlm_info.switch_time) { 7083 /* if a planned TID-to-link mapping was cancelled - 7084 * abort it 7085 */ 7086 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7087 &sdata->u.mgd.ttlm_work); 7088 } else if (sdata->u.mgd.ttlm_info.active) { 7089 /* if no TID-to-link element, set to default mapping in 7090 * which all TIDs are mapped to all setup links 7091 */ 7092 ret = ieee80211_vif_set_links(sdata, 7093 sdata->vif.valid_links, 7094 0); 7095 if (ret) { 7096 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7097 return; 7098 } 7099 ieee80211_vif_cfg_change_notify(sdata, 7100 BSS_CHANGED_MLD_VALID_LINKS); 7101 } 7102 memset(&sdata->u.mgd.ttlm_info, 0, 7103 sizeof(sdata->u.mgd.ttlm_info)); 7104 return; 7105 } 7106 7107 for (i = 0; i < elems->ttlm_num; i++) { 7108 struct ieee80211_adv_ttlm_info ttlm_info; 7109 u32 res; 7110 7111 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7112 &ttlm_info); 7113 7114 if (res) { 7115 __ieee80211_disconnect(sdata); 7116 return; 7117 } 7118 7119 if (ttlm_info.switch_time) { 7120 u16 beacon_ts_tu, st_tu, delay; 7121 u32 delay_jiffies; 7122 u64 mask; 7123 7124 /* The t2l map switch time is indicated with a partial 7125 * TSF value (bits 10 to 25), get the partial beacon TS 7126 * as well, and calc the delay to the start time. 7127 */ 7128 mask = GENMASK_ULL(25, 10); 7129 beacon_ts_tu = (beacon_ts & mask) >> 10; 7130 st_tu = ttlm_info.switch_time; 7131 delay = st_tu - beacon_ts_tu; 7132 7133 /* 7134 * If the switch time is far in the future, then it 7135 * could also be the previous switch still being 7136 * announced. 7137 * We can simply ignore it for now, if it is a future 7138 * switch the AP will continue to announce it anyway. 7139 */ 7140 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7141 return; 7142 7143 delay_jiffies = TU_TO_JIFFIES(delay); 7144 7145 /* Link switching can take time, so schedule it 7146 * 100ms before to be ready on time 7147 */ 7148 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7149 delay_jiffies -= 7150 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7151 else 7152 delay_jiffies = 0; 7153 7154 sdata->u.mgd.ttlm_info = ttlm_info; 7155 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7156 &sdata->u.mgd.ttlm_work); 7157 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7158 &sdata->u.mgd.ttlm_work, 7159 delay_jiffies); 7160 return; 7161 } 7162 } 7163 } 7164 7165 static void 7166 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7167 int reporting_link_id, 7168 struct ieee802_11_elems *elems) 7169 { 7170 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7171 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7172 const struct element *sub; 7173 const u8 *subelems; 7174 size_t subelems_len; 7175 u8 common_size; 7176 int link_id; 7177 7178 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7179 return; 7180 7181 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7182 subelems = (u8 *)elems->ml_basic + common_size; 7183 subelems_len = elems->ml_basic_len - common_size; 7184 7185 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7186 subelems, subelems_len) { 7187 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7188 struct ieee80211_link_data *link; 7189 ssize_t len; 7190 7191 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7192 sub->datalen)) 7193 continue; 7194 7195 link_id = le16_get_bits(prof->control, 7196 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7197 /* need a valid link ID, but also not our own, both AP bugs */ 7198 if (link_id == reporting_link_id || 7199 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7200 continue; 7201 7202 link = sdata_dereference(sdata->link[link_id], sdata); 7203 if (!link) 7204 continue; 7205 7206 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7207 NULL, 0, 7208 IEEE80211_MLE_SUBELEM_FRAGMENT); 7209 if (WARN_ON(len < 0)) 7210 continue; 7211 7212 sta_profiles[link_id] = sub; 7213 sta_profiles_len[link_id] = len; 7214 } 7215 7216 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7217 struct ieee80211_mle_per_sta_profile *prof; 7218 struct ieee802_11_elems *prof_elems; 7219 struct ieee80211_link_data *link; 7220 ssize_t len; 7221 7222 if (link_id == reporting_link_id) 7223 continue; 7224 7225 link = sdata_dereference(sdata->link[link_id], sdata); 7226 if (!link) 7227 continue; 7228 7229 if (!sta_profiles[link_id]) { 7230 prof_elems = NULL; 7231 goto handle; 7232 } 7233 7234 /* we can defragment in-place, won't use the buffer again */ 7235 len = cfg80211_defragment_element(sta_profiles[link_id], 7236 subelems, subelems_len, 7237 (void *)sta_profiles[link_id], 7238 sta_profiles_len[link_id], 7239 IEEE80211_MLE_SUBELEM_FRAGMENT); 7240 if (WARN_ON(len != sta_profiles_len[link_id])) 7241 continue; 7242 7243 prof = (void *)sta_profiles[link_id]; 7244 prof_elems = ieee802_11_parse_elems(prof->variable + 7245 (prof->sta_info_len - 1), 7246 len - 7247 (prof->sta_info_len - 1), 7248 false, NULL); 7249 7250 /* memory allocation failed - let's hope that's transient */ 7251 if (!prof_elems) 7252 continue; 7253 7254 handle: 7255 /* 7256 * FIXME: the timings here are obviously incorrect, 7257 * but only older Intel drivers seem to care, and 7258 * those don't have MLO. If you really need this, 7259 * the problem is having to calculate it with the 7260 * TSF offset etc. The device_timestamp is still 7261 * correct, of course. 7262 */ 7263 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7264 IEEE80211_CSA_SOURCE_OTHER_LINK); 7265 kfree(prof_elems); 7266 } 7267 } 7268 7269 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7270 const struct ieee802_11_elems *elems) 7271 { 7272 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7273 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7274 7275 if (!elems->ssid) 7276 return false; 7277 7278 /* hidden SSID: zero length */ 7279 if (elems->ssid_len == 0) 7280 return false; 7281 7282 if (elems->ssid_len != cfg->ssid_len) 7283 return true; 7284 7285 /* hidden SSID: zeroed out */ 7286 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7287 return false; 7288 7289 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7290 } 7291 7292 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7293 struct ieee80211_hdr *hdr, size_t len, 7294 struct ieee80211_rx_status *rx_status) 7295 { 7296 struct ieee80211_sub_if_data *sdata = link->sdata; 7297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7298 struct ieee80211_bss_conf *bss_conf = link->conf; 7299 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7300 struct ieee80211_mgmt *mgmt = (void *) hdr; 7301 struct ieee80211_ext *ext = NULL; 7302 size_t baselen; 7303 struct ieee802_11_elems *elems; 7304 struct ieee80211_local *local = sdata->local; 7305 struct ieee80211_chanctx_conf *chanctx_conf; 7306 struct ieee80211_supported_band *sband; 7307 struct ieee80211_channel *chan; 7308 struct link_sta_info *link_sta; 7309 struct sta_info *sta; 7310 u64 changed = 0; 7311 bool erp_valid; 7312 u8 erp_value = 0; 7313 u32 ncrc = 0; 7314 u8 *bssid, *variable = mgmt->u.beacon.variable; 7315 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7316 struct ieee80211_elems_parse_params parse_params = { 7317 .mode = link->u.mgd.conn.mode, 7318 .link_id = -1, 7319 .from_ap = true, 7320 }; 7321 7322 lockdep_assert_wiphy(local->hw.wiphy); 7323 7324 /* Process beacon from the current BSS */ 7325 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7326 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7327 ext = (void *)mgmt; 7328 variable = ext->u.s1g_beacon.variable + 7329 ieee80211_s1g_optional_len(ext->frame_control); 7330 } 7331 7332 baselen = (u8 *) variable - (u8 *) mgmt; 7333 if (baselen > len) 7334 return; 7335 7336 parse_params.start = variable; 7337 parse_params.len = len - baselen; 7338 7339 rcu_read_lock(); 7340 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7341 if (!chanctx_conf) { 7342 rcu_read_unlock(); 7343 return; 7344 } 7345 7346 if (ieee80211_rx_status_to_khz(rx_status) != 7347 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 7348 rcu_read_unlock(); 7349 return; 7350 } 7351 chan = chanctx_conf->def.chan; 7352 rcu_read_unlock(); 7353 7354 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7355 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7356 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7357 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7358 elems = ieee802_11_parse_elems_full(&parse_params); 7359 if (!elems) 7360 return; 7361 7362 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7363 7364 if (elems->dtim_period) 7365 link->u.mgd.dtim_period = elems->dtim_period; 7366 link->u.mgd.have_beacon = true; 7367 ifmgd->assoc_data->need_beacon = false; 7368 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7369 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7370 bss_conf->sync_tsf = 7371 le64_to_cpu(mgmt->u.beacon.timestamp); 7372 bss_conf->sync_device_ts = 7373 rx_status->device_timestamp; 7374 bss_conf->sync_dtim_count = elems->dtim_count; 7375 } 7376 7377 if (elems->mbssid_config_ie) 7378 bss_conf->profile_periodicity = 7379 elems->mbssid_config_ie->profile_periodicity; 7380 else 7381 bss_conf->profile_periodicity = 0; 7382 7383 if (elems->ext_capab_len >= 11 && 7384 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7385 bss_conf->ema_ap = true; 7386 else 7387 bss_conf->ema_ap = false; 7388 7389 /* continue assoc process */ 7390 ifmgd->assoc_data->timeout = jiffies; 7391 ifmgd->assoc_data->timeout_started = true; 7392 run_again(sdata, ifmgd->assoc_data->timeout); 7393 kfree(elems); 7394 return; 7395 } 7396 7397 if (!ifmgd->associated || 7398 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7399 return; 7400 bssid = link->u.mgd.bssid; 7401 7402 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7403 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7404 local, rx_status); 7405 7406 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7407 mlme_dbg_ratelimited(sdata, 7408 "cancelling AP probe due to a received beacon\n"); 7409 ieee80211_reset_ap_probe(sdata); 7410 } 7411 7412 /* 7413 * Push the beacon loss detection into the future since 7414 * we are processing a beacon from the AP just now. 7415 */ 7416 ieee80211_sta_reset_beacon_monitor(sdata); 7417 7418 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7419 * element (which carries the beacon interval). Don't forget to add a 7420 * bit to care_about_ies[] above if mac80211 is interested in a 7421 * changing S1G element. 7422 */ 7423 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7424 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7425 parse_params.bss = bss_conf->bss; 7426 parse_params.filter = care_about_ies; 7427 parse_params.crc = ncrc; 7428 elems = ieee802_11_parse_elems_full(&parse_params); 7429 if (!elems) 7430 return; 7431 7432 if (rx_status->flag & RX_FLAG_DECRYPTED && 7433 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7434 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7435 sdata->vif.cfg.ap_addr); 7436 __ieee80211_disconnect(sdata); 7437 return; 7438 } 7439 7440 ncrc = elems->crc; 7441 7442 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7443 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7444 if (local->hw.conf.dynamic_ps_timeout > 0) { 7445 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7446 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7447 ieee80211_hw_config(local, -1, 7448 IEEE80211_CONF_CHANGE_PS); 7449 } 7450 ieee80211_send_nullfunc(local, sdata, false); 7451 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7452 local->pspolling = true; 7453 7454 /* 7455 * Here is assumed that the driver will be 7456 * able to send ps-poll frame and receive a 7457 * response even though power save mode is 7458 * enabled, but some drivers might require 7459 * to disable power save here. This needs 7460 * to be investigated. 7461 */ 7462 ieee80211_send_pspoll(local, sdata); 7463 } 7464 } 7465 7466 if (sdata->vif.p2p || 7467 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7468 struct ieee80211_p2p_noa_attr noa = {}; 7469 int ret; 7470 7471 ret = cfg80211_get_p2p_attr(variable, 7472 len - baselen, 7473 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7474 (u8 *) &noa, sizeof(noa)); 7475 if (ret >= 2) { 7476 if (link->u.mgd.p2p_noa_index != noa.index) { 7477 /* valid noa_attr and index changed */ 7478 link->u.mgd.p2p_noa_index = noa.index; 7479 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7480 changed |= BSS_CHANGED_P2P_PS; 7481 /* 7482 * make sure we update all information, the CRC 7483 * mechanism doesn't look at P2P attributes. 7484 */ 7485 link->u.mgd.beacon_crc_valid = false; 7486 } 7487 } else if (link->u.mgd.p2p_noa_index != -1) { 7488 /* noa_attr not found and we had valid noa_attr before */ 7489 link->u.mgd.p2p_noa_index = -1; 7490 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7491 changed |= BSS_CHANGED_P2P_PS; 7492 link->u.mgd.beacon_crc_valid = false; 7493 } 7494 } 7495 7496 /* 7497 * Update beacon timing and dtim count on every beacon appearance. This 7498 * will allow the driver to use the most updated values. Do it before 7499 * comparing this one with last received beacon. 7500 * IMPORTANT: These parameters would possibly be out of sync by the time 7501 * the driver will use them. The synchronized view is currently 7502 * guaranteed only in certain callbacks. 7503 */ 7504 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7505 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7506 bss_conf->sync_tsf = 7507 le64_to_cpu(mgmt->u.beacon.timestamp); 7508 bss_conf->sync_device_ts = 7509 rx_status->device_timestamp; 7510 bss_conf->sync_dtim_count = elems->dtim_count; 7511 } 7512 7513 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7514 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7515 parse_params.start, 7516 parse_params.len))) 7517 goto free; 7518 link->u.mgd.beacon_crc = ncrc; 7519 link->u.mgd.beacon_crc_valid = true; 7520 7521 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7522 7523 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7524 rx_status->device_timestamp, 7525 elems, elems, 7526 IEEE80211_CSA_SOURCE_BEACON); 7527 7528 /* note that after this elems->ml_basic can no longer be used fully */ 7529 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7530 7531 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7532 7533 if (!sdata->u.mgd.epcs.enabled && 7534 !link->u.mgd.disable_wmm_tracking && 7535 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7536 elems->wmm_param_len, 7537 elems->mu_edca_param_set)) 7538 changed |= BSS_CHANGED_QOS; 7539 7540 /* 7541 * If we haven't had a beacon before, tell the driver about the 7542 * DTIM period (and beacon timing if desired) now. 7543 */ 7544 if (!link->u.mgd.have_beacon) { 7545 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7546 bss_conf->dtim_period = elems->dtim_period ?: 1; 7547 7548 changed |= BSS_CHANGED_BEACON_INFO; 7549 link->u.mgd.have_beacon = true; 7550 7551 ieee80211_recalc_ps(local); 7552 7553 ieee80211_recalc_ps_vif(sdata); 7554 } 7555 7556 if (elems->erp_info) { 7557 erp_valid = true; 7558 erp_value = elems->erp_info[0]; 7559 } else { 7560 erp_valid = false; 7561 } 7562 7563 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7564 changed |= ieee80211_handle_bss_capability(link, 7565 le16_to_cpu(mgmt->u.beacon.capab_info), 7566 erp_valid, erp_value); 7567 7568 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7569 if (WARN_ON(!sta)) { 7570 goto free; 7571 } 7572 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7573 lockdep_is_held(&local->hw.wiphy->mtx)); 7574 if (WARN_ON(!link_sta)) { 7575 goto free; 7576 } 7577 7578 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7579 goto free; 7580 7581 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7582 7583 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7584 7585 if (ieee80211_config_bw(link, elems, true, &changed, 7586 IEEE80211_STYPE_BEACON)) { 7587 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7588 WLAN_REASON_DEAUTH_LEAVING, 7589 true, deauth_buf); 7590 ieee80211_report_disconnect(sdata, deauth_buf, 7591 sizeof(deauth_buf), true, 7592 WLAN_REASON_DEAUTH_LEAVING, 7593 false); 7594 goto free; 7595 } 7596 7597 if (elems->opmode_notif) 7598 ieee80211_vht_handle_opmode(sdata, link_sta, 7599 *elems->opmode_notif, 7600 rx_status->band); 7601 7602 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7603 elems->country_elem, 7604 elems->country_elem_len, 7605 elems->pwr_constr_elem, 7606 elems->cisco_dtpc_elem); 7607 7608 ieee80211_ml_reconfiguration(sdata, elems); 7609 ieee80211_process_adv_ttlm(sdata, elems, 7610 le64_to_cpu(mgmt->u.beacon.timestamp)); 7611 7612 ieee80211_link_info_change_notify(sdata, link, changed); 7613 free: 7614 kfree(elems); 7615 } 7616 7617 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7618 struct ieee80211_neg_ttlm neg_ttlm) 7619 { 7620 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7621 u8 i; 7622 7623 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7624 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7625 7626 /* If there is an active TTLM, unset previously suspended links */ 7627 if (sdata->vif.neg_ttlm.valid) 7628 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7629 7630 /* exclude links that are already disabled by advertised TTLM */ 7631 new_active_links = 7632 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7633 new_suspended_links = 7634 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7635 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7636 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7637 new_dormant_links, new_suspended_links)) 7638 return; 7639 7640 sdata->vif.neg_ttlm = neg_ttlm; 7641 sdata->vif.neg_ttlm.valid = true; 7642 } 7643 7644 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7645 struct wiphy_work *work) 7646 { 7647 struct ieee80211_sub_if_data *sdata = 7648 container_of(work, struct ieee80211_sub_if_data, 7649 u.mgd.neg_ttlm_timeout_work.work); 7650 7651 sdata_info(sdata, 7652 "No negotiated TTLM response from AP, disconnecting.\n"); 7653 7654 __ieee80211_disconnect(sdata); 7655 } 7656 7657 static void 7658 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7659 struct ieee80211_neg_ttlm *neg_ttlm) 7660 { 7661 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7662 7663 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7664 sizeof(neg_ttlm->downlink))) { 7665 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7666 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7667 } else { 7668 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7669 } 7670 7671 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7672 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7673 __le16 map; 7674 7675 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7676 7677 pos = skb_put(skb, len + 2); 7678 *pos++ = WLAN_EID_EXTENSION; 7679 len_pos = pos++; 7680 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7681 *pos++ = direction[i]; 7682 map_ind_pos = pos++; 7683 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7684 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7685 cpu_to_le16(neg_ttlm->uplink[tid]) : 7686 cpu_to_le16(neg_ttlm->downlink[tid]); 7687 if (!map) 7688 continue; 7689 7690 len += 2; 7691 map_ind |= BIT(tid); 7692 skb_put_data(skb, &map, sizeof(map)); 7693 } 7694 7695 *map_ind_pos = map_ind; 7696 *len_pos = len; 7697 7698 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7699 break; 7700 } 7701 } 7702 7703 static void 7704 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7705 struct ieee80211_neg_ttlm *neg_ttlm, 7706 u8 dialog_token) 7707 { 7708 struct ieee80211_local *local = sdata->local; 7709 struct ieee80211_mgmt *mgmt; 7710 struct sk_buff *skb; 7711 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7712 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7713 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7714 7715 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7716 if (!skb) 7717 return; 7718 7719 skb_reserve(skb, local->tx_headroom); 7720 mgmt = skb_put_zero(skb, hdr_len); 7721 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7722 IEEE80211_STYPE_ACTION); 7723 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7724 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7725 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7726 7727 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7728 mgmt->u.action.u.ttlm_req.action_code = 7729 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7730 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7731 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7732 ieee80211_tx_skb(sdata, skb); 7733 } 7734 7735 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7736 struct cfg80211_ttlm_params *params) 7737 { 7738 struct ieee80211_neg_ttlm neg_ttlm = {}; 7739 u8 i; 7740 7741 if (!ieee80211_vif_is_mld(&sdata->vif) || 7742 !(sdata->vif.cfg.mld_capa_op & 7743 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7744 return -EINVAL; 7745 7746 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7747 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7748 (params->ulink[i] & ~sdata->vif.valid_links)) 7749 return -EINVAL; 7750 7751 neg_ttlm.downlink[i] = params->dlink[i]; 7752 neg_ttlm.uplink[i] = params->ulink[i]; 7753 } 7754 7755 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7756 NEG_TTLM_RES_ACCEPT) 7757 return -EINVAL; 7758 7759 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7760 sdata->u.mgd.dialog_token_alloc++; 7761 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7762 sdata->u.mgd.dialog_token_alloc); 7763 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7764 &sdata->u.mgd.neg_ttlm_timeout_work); 7765 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7766 &sdata->u.mgd.neg_ttlm_timeout_work, 7767 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7768 return 0; 7769 } 7770 7771 static void 7772 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7773 enum ieee80211_neg_ttlm_res ttlm_res, 7774 u8 dialog_token, 7775 struct ieee80211_neg_ttlm *neg_ttlm) 7776 { 7777 struct ieee80211_local *local = sdata->local; 7778 struct ieee80211_mgmt *mgmt; 7779 struct sk_buff *skb; 7780 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7781 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7782 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7783 u16 status_code; 7784 7785 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7786 if (!skb) 7787 return; 7788 7789 skb_reserve(skb, local->tx_headroom); 7790 mgmt = skb_put_zero(skb, hdr_len); 7791 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7792 IEEE80211_STYPE_ACTION); 7793 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7794 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7795 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7796 7797 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7798 mgmt->u.action.u.ttlm_res.action_code = 7799 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7800 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7801 switch (ttlm_res) { 7802 default: 7803 WARN_ON(1); 7804 fallthrough; 7805 case NEG_TTLM_RES_REJECT: 7806 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7807 break; 7808 case NEG_TTLM_RES_ACCEPT: 7809 status_code = WLAN_STATUS_SUCCESS; 7810 break; 7811 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7812 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7813 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7814 break; 7815 } 7816 7817 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7818 ieee80211_tx_skb(sdata, skb); 7819 } 7820 7821 static int 7822 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7823 const struct ieee80211_ttlm_elem *ttlm, 7824 struct ieee80211_neg_ttlm *neg_ttlm, 7825 u8 *direction) 7826 { 7827 u8 control, link_map_presence, map_size, tid; 7828 u8 *pos; 7829 7830 /* The element size was already validated in 7831 * ieee80211_tid_to_link_map_size_ok() 7832 */ 7833 pos = (void *)ttlm->optional; 7834 7835 control = ttlm->control; 7836 7837 /* mapping switch time and expected duration fields are not expected 7838 * in case of negotiated TTLM 7839 */ 7840 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7841 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7842 mlme_dbg(sdata, 7843 "Invalid TTLM element in negotiated TTLM request\n"); 7844 return -EINVAL; 7845 } 7846 7847 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7848 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7849 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7850 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7851 } 7852 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7853 return 0; 7854 } 7855 7856 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7857 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7858 *direction != IEEE80211_TTLM_DIRECTION_UP && 7859 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7860 return -EINVAL; 7861 7862 link_map_presence = *pos; 7863 pos++; 7864 7865 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7866 map_size = 1; 7867 else 7868 map_size = 2; 7869 7870 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7871 u16 map; 7872 7873 if (link_map_presence & BIT(tid)) { 7874 map = ieee80211_get_ttlm(map_size, pos); 7875 if (!map) { 7876 mlme_dbg(sdata, 7877 "No active links for TID %d", tid); 7878 return -EINVAL; 7879 } 7880 } else { 7881 map = 0; 7882 } 7883 7884 switch (*direction) { 7885 case IEEE80211_TTLM_DIRECTION_BOTH: 7886 neg_ttlm->downlink[tid] = map; 7887 neg_ttlm->uplink[tid] = map; 7888 break; 7889 case IEEE80211_TTLM_DIRECTION_DOWN: 7890 neg_ttlm->downlink[tid] = map; 7891 break; 7892 case IEEE80211_TTLM_DIRECTION_UP: 7893 neg_ttlm->uplink[tid] = map; 7894 break; 7895 default: 7896 return -EINVAL; 7897 } 7898 pos += map_size; 7899 } 7900 return 0; 7901 } 7902 7903 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7904 struct ieee80211_mgmt *mgmt, size_t len) 7905 { 7906 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7907 size_t ies_len; 7908 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7909 struct ieee802_11_elems *elems = NULL; 7910 struct ieee80211_neg_ttlm neg_ttlm = {}; 7911 7912 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7913 7914 if (!ieee80211_vif_is_mld(&sdata->vif)) 7915 return; 7916 7917 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7918 ies_len = len - offsetof(struct ieee80211_mgmt, 7919 u.action.u.ttlm_req.variable); 7920 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7921 ies_len, true, NULL); 7922 if (!elems) { 7923 ttlm_res = NEG_TTLM_RES_REJECT; 7924 goto out; 7925 } 7926 7927 for (i = 0; i < elems->ttlm_num; i++) { 7928 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7929 &neg_ttlm, &direction[i]) || 7930 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7931 elems->ttlm_num != 1)) { 7932 ttlm_res = NEG_TTLM_RES_REJECT; 7933 goto out; 7934 } 7935 } 7936 7937 if (!elems->ttlm_num || 7938 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7939 ttlm_res = NEG_TTLM_RES_REJECT; 7940 goto out; 7941 } 7942 7943 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7944 if ((neg_ttlm.downlink[i] && 7945 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7946 (neg_ttlm.uplink[i] && 7947 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7948 ttlm_res = NEG_TTLM_RES_REJECT; 7949 goto out; 7950 } 7951 } 7952 7953 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7954 7955 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7956 goto out; 7957 7958 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7959 out: 7960 kfree(elems); 7961 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7962 } 7963 7964 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7965 struct ieee80211_mgmt *mgmt, size_t len) 7966 { 7967 if (!ieee80211_vif_is_mld(&sdata->vif) || 7968 mgmt->u.action.u.ttlm_req.dialog_token != 7969 sdata->u.mgd.dialog_token_alloc) 7970 return; 7971 7972 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7973 &sdata->u.mgd.neg_ttlm_timeout_work); 7974 7975 /* MLD station sends a TID to link mapping request, mainly to handle 7976 * BTM (BSS transition management) request, in which case it needs to 7977 * restrict the active links set. 7978 * In this case it's not expected that the MLD AP will reject the 7979 * negotiated TTLM request. 7980 * This can be better implemented in the future, to handle request 7981 * rejections. 7982 */ 7983 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 7984 __ieee80211_disconnect(sdata); 7985 } 7986 7987 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 7988 { 7989 u16 new_dormant_links; 7990 7991 if (!sdata->vif.neg_ttlm.valid) 7992 return; 7993 7994 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7995 new_dormant_links = 7996 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7997 sdata->vif.suspended_links = 0; 7998 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7999 new_dormant_links); 8000 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8001 BSS_CHANGED_MLD_VALID_LINKS); 8002 } 8003 8004 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8005 struct wiphy_work *work) 8006 { 8007 struct ieee80211_sub_if_data *sdata = 8008 container_of(work, struct ieee80211_sub_if_data, 8009 u.mgd.teardown_ttlm_work); 8010 8011 ieee80211_process_ttlm_teardown(sdata); 8012 } 8013 8014 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8015 { 8016 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8017 struct ieee80211_local *local = sdata->local; 8018 struct ieee80211_mgmt *mgmt; 8019 struct sk_buff *skb; 8020 int frame_len = offsetofend(struct ieee80211_mgmt, 8021 u.action.u.ttlm_tear_down); 8022 struct ieee80211_tx_info *info; 8023 8024 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8025 if (!skb) 8026 return; 8027 8028 skb_reserve(skb, local->hw.extra_tx_headroom); 8029 mgmt = skb_put_zero(skb, frame_len); 8030 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8031 IEEE80211_STYPE_ACTION); 8032 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8033 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8034 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8035 8036 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8037 mgmt->u.action.u.ttlm_tear_down.action_code = 8038 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8039 8040 info = IEEE80211_SKB_CB(skb); 8041 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8042 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8043 ieee80211_tx_skb(sdata, skb); 8044 } 8045 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8046 8047 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8048 struct sk_buff *skb) 8049 { 8050 struct ieee80211_link_data *link = &sdata->deflink; 8051 struct ieee80211_rx_status *rx_status; 8052 struct ieee80211_hdr *hdr; 8053 u16 fc; 8054 8055 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8056 8057 rx_status = (struct ieee80211_rx_status *) skb->cb; 8058 hdr = (struct ieee80211_hdr *) skb->data; 8059 fc = le16_to_cpu(hdr->frame_control); 8060 8061 switch (fc & IEEE80211_FCTL_STYPE) { 8062 case IEEE80211_STYPE_S1G_BEACON: 8063 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8064 break; 8065 } 8066 } 8067 8068 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8069 struct sk_buff *skb) 8070 { 8071 struct ieee80211_link_data *link = &sdata->deflink; 8072 struct ieee80211_rx_status *rx_status; 8073 struct ieee802_11_elems *elems; 8074 struct ieee80211_mgmt *mgmt; 8075 u16 fc; 8076 int ies_len; 8077 8078 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8079 8080 rx_status = (struct ieee80211_rx_status *) skb->cb; 8081 mgmt = (struct ieee80211_mgmt *) skb->data; 8082 fc = le16_to_cpu(mgmt->frame_control); 8083 8084 if (rx_status->link_valid) { 8085 link = sdata_dereference(sdata->link[rx_status->link_id], 8086 sdata); 8087 if (!link) 8088 return; 8089 } 8090 8091 switch (fc & IEEE80211_FCTL_STYPE) { 8092 case IEEE80211_STYPE_BEACON: 8093 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8094 skb->len, rx_status); 8095 break; 8096 case IEEE80211_STYPE_PROBE_RESP: 8097 ieee80211_rx_mgmt_probe_resp(link, skb); 8098 break; 8099 case IEEE80211_STYPE_AUTH: 8100 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8101 break; 8102 case IEEE80211_STYPE_DEAUTH: 8103 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8104 break; 8105 case IEEE80211_STYPE_DISASSOC: 8106 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8107 break; 8108 case IEEE80211_STYPE_ASSOC_RESP: 8109 case IEEE80211_STYPE_REASSOC_RESP: 8110 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8111 break; 8112 case IEEE80211_STYPE_ACTION: 8113 if (!sdata->u.mgd.associated || 8114 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8115 break; 8116 8117 switch (mgmt->u.action.category) { 8118 case WLAN_CATEGORY_SPECTRUM_MGMT: 8119 ies_len = skb->len - 8120 offsetof(struct ieee80211_mgmt, 8121 u.action.u.chan_switch.variable); 8122 8123 if (ies_len < 0) 8124 break; 8125 8126 /* CSA IE cannot be overridden, no need for BSSID */ 8127 elems = ieee802_11_parse_elems( 8128 mgmt->u.action.u.chan_switch.variable, 8129 ies_len, true, NULL); 8130 8131 if (elems && !elems->parse_error) { 8132 enum ieee80211_csa_source src = 8133 IEEE80211_CSA_SOURCE_PROT_ACTION; 8134 8135 ieee80211_sta_process_chanswitch(link, 8136 rx_status->mactime, 8137 rx_status->device_timestamp, 8138 elems, elems, 8139 src); 8140 } 8141 kfree(elems); 8142 break; 8143 case WLAN_CATEGORY_PUBLIC: 8144 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8145 ies_len = skb->len - 8146 offsetof(struct ieee80211_mgmt, 8147 u.action.u.ext_chan_switch.variable); 8148 8149 if (ies_len < 0) 8150 break; 8151 8152 /* 8153 * extended CSA IE can't be overridden, no need for 8154 * BSSID 8155 */ 8156 elems = ieee802_11_parse_elems( 8157 mgmt->u.action.u.ext_chan_switch.variable, 8158 ies_len, true, NULL); 8159 8160 if (elems && !elems->parse_error) { 8161 enum ieee80211_csa_source src; 8162 8163 if (mgmt->u.action.category == 8164 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8165 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8166 else 8167 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8168 8169 /* for the handling code pretend it was an IE */ 8170 elems->ext_chansw_ie = 8171 &mgmt->u.action.u.ext_chan_switch.data; 8172 8173 ieee80211_sta_process_chanswitch(link, 8174 rx_status->mactime, 8175 rx_status->device_timestamp, 8176 elems, elems, 8177 src); 8178 } 8179 8180 kfree(elems); 8181 break; 8182 } 8183 break; 8184 } 8185 } 8186 8187 static void ieee80211_sta_timer(struct timer_list *t) 8188 { 8189 struct ieee80211_sub_if_data *sdata = 8190 timer_container_of(sdata, t, u.mgd.timer); 8191 8192 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8193 } 8194 8195 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8196 u8 reason, bool tx) 8197 { 8198 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8199 8200 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8201 tx, frame_buf); 8202 8203 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8204 reason, false); 8205 } 8206 8207 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8208 { 8209 struct ieee80211_local *local = sdata->local; 8210 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8211 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8212 u32 tx_flags = 0; 8213 u16 trans = 1; 8214 u16 status = 0; 8215 struct ieee80211_prep_tx_info info = { 8216 .subtype = IEEE80211_STYPE_AUTH, 8217 }; 8218 8219 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8220 8221 if (WARN_ON_ONCE(!auth_data)) 8222 return -EINVAL; 8223 8224 auth_data->tries++; 8225 8226 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8227 sdata_info(sdata, "authentication with %pM timed out\n", 8228 auth_data->ap_addr); 8229 8230 /* 8231 * Most likely AP is not in the range so remove the 8232 * bss struct for that AP. 8233 */ 8234 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8235 8236 return -ETIMEDOUT; 8237 } 8238 8239 if (auth_data->algorithm == WLAN_AUTH_SAE) 8240 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8241 8242 info.link_id = auth_data->link_id; 8243 drv_mgd_prepare_tx(local, sdata, &info); 8244 8245 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8246 auth_data->ap_addr, auth_data->tries, 8247 IEEE80211_AUTH_MAX_TRIES); 8248 8249 auth_data->expected_transaction = 2; 8250 8251 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8252 trans = auth_data->sae_trans; 8253 status = auth_data->sae_status; 8254 auth_data->expected_transaction = trans; 8255 } 8256 8257 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8258 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8259 IEEE80211_TX_INTFL_MLME_CONN_TX; 8260 8261 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8262 auth_data->data, auth_data->data_len, 8263 auth_data->ap_addr, auth_data->ap_addr, 8264 NULL, 0, 0, tx_flags); 8265 8266 if (tx_flags == 0) { 8267 if (auth_data->algorithm == WLAN_AUTH_SAE) 8268 auth_data->timeout = jiffies + 8269 IEEE80211_AUTH_TIMEOUT_SAE; 8270 else 8271 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8272 } else { 8273 auth_data->timeout = 8274 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8275 } 8276 8277 auth_data->timeout_started = true; 8278 run_again(sdata, auth_data->timeout); 8279 8280 return 0; 8281 } 8282 8283 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8284 { 8285 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8286 struct ieee80211_local *local = sdata->local; 8287 int ret; 8288 8289 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8290 8291 assoc_data->tries++; 8292 assoc_data->comeback = false; 8293 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8294 sdata_info(sdata, "association with %pM timed out\n", 8295 assoc_data->ap_addr); 8296 8297 /* 8298 * Most likely AP is not in the range so remove the 8299 * bss struct for that AP. 8300 */ 8301 cfg80211_unlink_bss(local->hw.wiphy, 8302 assoc_data->link[assoc_data->assoc_link_id].bss); 8303 8304 return -ETIMEDOUT; 8305 } 8306 8307 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8308 assoc_data->ap_addr, assoc_data->tries, 8309 IEEE80211_ASSOC_MAX_TRIES); 8310 ret = ieee80211_send_assoc(sdata); 8311 if (ret) 8312 return ret; 8313 8314 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8315 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8316 assoc_data->timeout_started = true; 8317 run_again(sdata, assoc_data->timeout); 8318 } else { 8319 assoc_data->timeout = 8320 round_jiffies_up(jiffies + 8321 IEEE80211_ASSOC_TIMEOUT_LONG); 8322 assoc_data->timeout_started = true; 8323 run_again(sdata, assoc_data->timeout); 8324 } 8325 8326 return 0; 8327 } 8328 8329 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8330 __le16 fc, bool acked) 8331 { 8332 struct ieee80211_local *local = sdata->local; 8333 8334 sdata->u.mgd.status_fc = fc; 8335 sdata->u.mgd.status_acked = acked; 8336 sdata->u.mgd.status_received = true; 8337 8338 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8339 } 8340 8341 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8342 { 8343 struct ieee80211_local *local = sdata->local; 8344 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8345 8346 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8347 8348 if (ifmgd->status_received) { 8349 __le16 fc = ifmgd->status_fc; 8350 bool status_acked = ifmgd->status_acked; 8351 8352 ifmgd->status_received = false; 8353 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8354 if (status_acked) { 8355 if (ifmgd->auth_data->algorithm == 8356 WLAN_AUTH_SAE) 8357 ifmgd->auth_data->timeout = 8358 jiffies + 8359 IEEE80211_AUTH_TIMEOUT_SAE; 8360 else 8361 ifmgd->auth_data->timeout = 8362 jiffies + 8363 IEEE80211_AUTH_TIMEOUT_SHORT; 8364 run_again(sdata, ifmgd->auth_data->timeout); 8365 } else { 8366 ifmgd->auth_data->timeout = jiffies - 1; 8367 } 8368 ifmgd->auth_data->timeout_started = true; 8369 } else if (ifmgd->assoc_data && 8370 !ifmgd->assoc_data->comeback && 8371 (ieee80211_is_assoc_req(fc) || 8372 ieee80211_is_reassoc_req(fc))) { 8373 /* 8374 * Update association timeout based on the TX status 8375 * for the (Re)Association Request frame. Skip this if 8376 * we have already processed a (Re)Association Response 8377 * frame that indicated need for association comeback 8378 * at a specific time in the future. This could happen 8379 * if the TX status information is delayed enough for 8380 * the response to be received and processed first. 8381 */ 8382 if (status_acked) { 8383 ifmgd->assoc_data->timeout = 8384 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8385 run_again(sdata, ifmgd->assoc_data->timeout); 8386 } else { 8387 ifmgd->assoc_data->timeout = jiffies - 1; 8388 } 8389 ifmgd->assoc_data->timeout_started = true; 8390 } 8391 } 8392 8393 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8394 time_after(jiffies, ifmgd->auth_data->timeout)) { 8395 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8396 /* 8397 * ok ... we waited for assoc or continuation but 8398 * userspace didn't do it, so kill the auth data 8399 */ 8400 ieee80211_destroy_auth_data(sdata, false); 8401 } else if (ieee80211_auth(sdata)) { 8402 u8 ap_addr[ETH_ALEN]; 8403 struct ieee80211_event event = { 8404 .type = MLME_EVENT, 8405 .u.mlme.data = AUTH_EVENT, 8406 .u.mlme.status = MLME_TIMEOUT, 8407 }; 8408 8409 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8410 8411 ieee80211_destroy_auth_data(sdata, false); 8412 8413 cfg80211_auth_timeout(sdata->dev, ap_addr); 8414 drv_event_callback(sdata->local, sdata, &event); 8415 } 8416 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8417 run_again(sdata, ifmgd->auth_data->timeout); 8418 8419 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8420 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8421 if ((ifmgd->assoc_data->need_beacon && 8422 !sdata->deflink.u.mgd.have_beacon) || 8423 ieee80211_do_assoc(sdata)) { 8424 struct ieee80211_event event = { 8425 .type = MLME_EVENT, 8426 .u.mlme.data = ASSOC_EVENT, 8427 .u.mlme.status = MLME_TIMEOUT, 8428 }; 8429 8430 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8431 drv_event_callback(sdata->local, sdata, &event); 8432 } 8433 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8434 run_again(sdata, ifmgd->assoc_data->timeout); 8435 8436 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8437 ifmgd->associated) { 8438 u8 *bssid = sdata->deflink.u.mgd.bssid; 8439 int max_tries; 8440 8441 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8442 max_tries = max_nullfunc_tries; 8443 else 8444 max_tries = max_probe_tries; 8445 8446 /* ACK received for nullfunc probing frame */ 8447 if (!ifmgd->probe_send_count) 8448 ieee80211_reset_ap_probe(sdata); 8449 else if (ifmgd->nullfunc_failed) { 8450 if (ifmgd->probe_send_count < max_tries) { 8451 mlme_dbg(sdata, 8452 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8453 bssid, ifmgd->probe_send_count, 8454 max_tries); 8455 ieee80211_mgd_probe_ap_send(sdata); 8456 } else { 8457 mlme_dbg(sdata, 8458 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8459 bssid); 8460 ieee80211_sta_connection_lost(sdata, 8461 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8462 false); 8463 } 8464 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8465 run_again(sdata, ifmgd->probe_timeout); 8466 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8467 mlme_dbg(sdata, 8468 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8469 bssid, probe_wait_ms); 8470 ieee80211_sta_connection_lost(sdata, 8471 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8472 } else if (ifmgd->probe_send_count < max_tries) { 8473 mlme_dbg(sdata, 8474 "No probe response from AP %pM after %dms, try %d/%i\n", 8475 bssid, probe_wait_ms, 8476 ifmgd->probe_send_count, max_tries); 8477 ieee80211_mgd_probe_ap_send(sdata); 8478 } else { 8479 /* 8480 * We actually lost the connection ... or did we? 8481 * Let's make sure! 8482 */ 8483 mlme_dbg(sdata, 8484 "No probe response from AP %pM after %dms, disconnecting.\n", 8485 bssid, probe_wait_ms); 8486 8487 ieee80211_sta_connection_lost(sdata, 8488 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8489 } 8490 } 8491 } 8492 8493 static bool 8494 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8495 { 8496 /* 8497 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8498 * the links. 8499 */ 8500 struct ieee80211_link_data *link; 8501 8502 guard(rcu)(); 8503 8504 for_each_link_data_rcu(sdata, link) { 8505 if (!(link->conf->csa_active && 8506 !link->u.mgd.csa.waiting_bcn)) 8507 return false; 8508 } 8509 8510 return true; 8511 } 8512 8513 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8514 { 8515 struct ieee80211_sub_if_data *sdata = 8516 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8517 8518 if (ieee80211_is_csa_in_progress(sdata)) 8519 return; 8520 8521 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8522 return; 8523 8524 sdata->u.mgd.connection_loss = false; 8525 wiphy_work_queue(sdata->local->hw.wiphy, 8526 &sdata->u.mgd.beacon_connection_loss_work); 8527 } 8528 8529 static unsigned long 8530 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8531 { 8532 unsigned long latest_timeout = jiffies; 8533 unsigned int link_id; 8534 struct sta_info *sta; 8535 8536 guard(rcu)(); 8537 8538 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8539 if (!sta) 8540 return 0; 8541 8542 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8543 link_id++) { 8544 struct link_sta_info *link_sta; 8545 unsigned long timeout; 8546 8547 link_sta = rcu_dereference(sta->link[link_id]); 8548 if (!link_sta) 8549 continue; 8550 8551 timeout = link_sta->status_stats.last_ack; 8552 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8553 timeout = link_sta->rx_stats.last_rx; 8554 8555 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8556 8557 /* 8558 * latest_timeout holds the timeout of the link 8559 * that will expire last among all links in an 8560 * non-AP MLD STA. This ensures that the connection 8561 * monitor timer is only reset if at least one link 8562 * is still active, and it is scheduled to fire at 8563 * the latest possible timeout. 8564 */ 8565 if (time_after(timeout, latest_timeout)) 8566 latest_timeout = timeout; 8567 } 8568 8569 return latest_timeout; 8570 } 8571 8572 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8573 { 8574 struct ieee80211_sub_if_data *sdata = 8575 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8576 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8577 struct ieee80211_local *local = sdata->local; 8578 unsigned long latest_timeout; 8579 8580 if (ieee80211_is_csa_in_progress(sdata)) 8581 return; 8582 8583 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8584 8585 /* 8586 * If latest timeout is after now, then update timer to fire at 8587 * the later date, but do not actually probe at this time. 8588 */ 8589 if (time_is_after_jiffies(latest_timeout)) { 8590 mod_timer(&ifmgd->conn_mon_timer, 8591 round_jiffies_up(latest_timeout)); 8592 return; 8593 } 8594 8595 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8596 } 8597 8598 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8599 struct wiphy_work *work) 8600 { 8601 struct ieee80211_sub_if_data *sdata = 8602 container_of(work, struct ieee80211_sub_if_data, 8603 u.mgd.monitor_work); 8604 8605 ieee80211_mgd_probe_ap(sdata, false); 8606 } 8607 8608 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8609 { 8610 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8611 __ieee80211_stop_poll(sdata); 8612 8613 /* let's probe the connection once */ 8614 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8615 wiphy_work_queue(sdata->local->hw.wiphy, 8616 &sdata->u.mgd.monitor_work); 8617 } 8618 } 8619 8620 #ifdef CONFIG_PM 8621 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8622 { 8623 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8624 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8625 8626 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8627 8628 if (ifmgd->auth_data || ifmgd->assoc_data) { 8629 const u8 *ap_addr = ifmgd->auth_data ? 8630 ifmgd->auth_data->ap_addr : 8631 ifmgd->assoc_data->ap_addr; 8632 8633 /* 8634 * If we are trying to authenticate / associate while suspending, 8635 * cfg80211 won't know and won't actually abort those attempts, 8636 * thus we need to do that ourselves. 8637 */ 8638 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8639 IEEE80211_STYPE_DEAUTH, 8640 WLAN_REASON_DEAUTH_LEAVING, 8641 false, frame_buf); 8642 if (ifmgd->assoc_data) 8643 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8644 if (ifmgd->auth_data) 8645 ieee80211_destroy_auth_data(sdata, false); 8646 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8647 IEEE80211_DEAUTH_FRAME_LEN, 8648 false); 8649 } 8650 8651 /* This is a bit of a hack - we should find a better and more generic 8652 * solution to this. Normally when suspending, cfg80211 will in fact 8653 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8654 * auth (not so important) or assoc (this is the problem) process. 8655 * 8656 * As a consequence, it can happen that we are in the process of both 8657 * associating and suspending, and receive an association response 8658 * after cfg80211 has checked if it needs to disconnect, but before 8659 * we actually set the flag to drop incoming frames. This will then 8660 * cause the workqueue flush to process the association response in 8661 * the suspend, resulting in a successful association just before it 8662 * tries to remove the interface from the driver, which now though 8663 * has a channel context assigned ... this results in issues. 8664 * 8665 * To work around this (for now) simply deauth here again if we're 8666 * now connected. 8667 */ 8668 if (ifmgd->associated && !sdata->local->wowlan) { 8669 u8 bssid[ETH_ALEN]; 8670 struct cfg80211_deauth_request req = { 8671 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8672 .bssid = bssid, 8673 }; 8674 8675 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8676 ieee80211_mgd_deauth(sdata, &req); 8677 } 8678 } 8679 #endif 8680 8681 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8682 { 8683 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8684 8685 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8686 8687 if (!ifmgd->associated) 8688 return; 8689 8690 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8691 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8692 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8693 ieee80211_sta_connection_lost(sdata, 8694 WLAN_REASON_UNSPECIFIED, 8695 true); 8696 return; 8697 } 8698 8699 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8700 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8701 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8702 ieee80211_sta_connection_lost(sdata, 8703 WLAN_REASON_UNSPECIFIED, 8704 true); 8705 return; 8706 } 8707 } 8708 8709 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8710 struct wiphy_work *work) 8711 { 8712 struct ieee80211_link_data *link = 8713 container_of(work, struct ieee80211_link_data, 8714 u.mgd.request_smps_work); 8715 8716 __ieee80211_request_smps_mgd(link->sdata, link, 8717 link->u.mgd.driver_smps_mode); 8718 } 8719 8720 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8721 struct wiphy_work *work) 8722 { 8723 struct ieee80211_sub_if_data *sdata = 8724 container_of(work, struct ieee80211_sub_if_data, 8725 u.mgd.reconf.wk.work); 8726 8727 if (!sdata->u.mgd.reconf.added_links && 8728 !sdata->u.mgd.reconf.removed_links) 8729 return; 8730 8731 sdata_info(sdata, 8732 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8733 sdata->u.mgd.reconf.added_links, 8734 sdata->u.mgd.reconf.removed_links); 8735 8736 __ieee80211_disconnect(sdata); 8737 } 8738 8739 /* interface setup */ 8740 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8741 { 8742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8743 8744 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8745 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8746 ieee80211_beacon_connection_loss_work); 8747 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8748 ieee80211_csa_connection_drop_work); 8749 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8750 ieee80211_tdls_peer_del_work); 8751 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8752 ieee80211_ml_reconf_work); 8753 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8754 ieee80211_ml_sta_reconf_timeout); 8755 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8756 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8757 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8758 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8759 ieee80211_sta_handle_tspec_ac_params_wk); 8760 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8761 ieee80211_tid_to_link_map_work); 8762 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8763 ieee80211_neg_ttlm_timeout_work); 8764 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8765 ieee80211_teardown_ttlm_work); 8766 8767 ifmgd->flags = 0; 8768 ifmgd->powersave = sdata->wdev.ps; 8769 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8770 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8771 /* Setup TDLS data */ 8772 spin_lock_init(&ifmgd->teardown_lock); 8773 ifmgd->teardown_skb = NULL; 8774 ifmgd->orig_teardown_skb = NULL; 8775 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8776 } 8777 8778 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8779 struct wiphy_work *work) 8780 { 8781 struct ieee80211_link_data *link = 8782 container_of(work, struct ieee80211_link_data, 8783 u.mgd.recalc_smps); 8784 8785 ieee80211_recalc_smps(link->sdata, link); 8786 } 8787 8788 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8789 { 8790 struct ieee80211_sub_if_data *sdata = link->sdata; 8791 struct ieee80211_local *local = sdata->local; 8792 unsigned int link_id = link->link_id; 8793 8794 link->u.mgd.p2p_noa_index = -1; 8795 link->conf->bssid = link->u.mgd.bssid; 8796 link->smps_mode = IEEE80211_SMPS_OFF; 8797 8798 wiphy_work_init(&link->u.mgd.request_smps_work, 8799 ieee80211_request_smps_mgd_work); 8800 wiphy_work_init(&link->u.mgd.recalc_smps, 8801 ieee80211_recalc_smps_work); 8802 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8803 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8804 else 8805 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8806 8807 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8808 ieee80211_csa_switch_work); 8809 8810 ieee80211_clear_tpe(&link->conf->tpe); 8811 8812 if (sdata->u.mgd.assoc_data) 8813 ether_addr_copy(link->conf->addr, 8814 sdata->u.mgd.assoc_data->link[link_id].addr); 8815 else if (sdata->u.mgd.reconf.add_links_data) 8816 ether_addr_copy(link->conf->addr, 8817 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8818 else if (!is_valid_ether_addr(link->conf->addr)) 8819 eth_random_addr(link->conf->addr); 8820 } 8821 8822 /* scan finished notification */ 8823 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8824 { 8825 struct ieee80211_sub_if_data *sdata; 8826 8827 /* Restart STA timers */ 8828 rcu_read_lock(); 8829 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8830 if (ieee80211_sdata_running(sdata)) 8831 ieee80211_restart_sta_timer(sdata); 8832 } 8833 rcu_read_unlock(); 8834 } 8835 8836 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8837 struct cfg80211_bss *cbss, s8 link_id, 8838 const u8 *ap_mld_addr, bool assoc, 8839 struct ieee80211_conn_settings *conn, 8840 bool override, 8841 unsigned long *userspace_selectors) 8842 { 8843 struct ieee80211_local *local = sdata->local; 8844 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8845 struct ieee80211_bss *bss = (void *)cbss->priv; 8846 struct sta_info *new_sta = NULL; 8847 struct ieee80211_link_data *link; 8848 bool have_sta = false; 8849 bool mlo; 8850 int err; 8851 u16 new_links; 8852 8853 if (link_id >= 0) { 8854 mlo = true; 8855 if (WARN_ON(!ap_mld_addr)) 8856 return -EINVAL; 8857 new_links = BIT(link_id); 8858 } else { 8859 if (WARN_ON(ap_mld_addr)) 8860 return -EINVAL; 8861 ap_mld_addr = cbss->bssid; 8862 new_links = 0; 8863 link_id = 0; 8864 mlo = false; 8865 } 8866 8867 if (assoc) { 8868 rcu_read_lock(); 8869 have_sta = sta_info_get(sdata, ap_mld_addr); 8870 rcu_read_unlock(); 8871 } 8872 8873 if (mlo && !have_sta && 8874 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8875 return -EINVAL; 8876 8877 err = ieee80211_vif_set_links(sdata, new_links, 0); 8878 if (err) 8879 return err; 8880 8881 link = sdata_dereference(sdata->link[link_id], sdata); 8882 if (WARN_ON(!link)) { 8883 err = -ENOLINK; 8884 goto out_err; 8885 } 8886 8887 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8888 err = -EINVAL; 8889 goto out_err; 8890 } 8891 8892 /* If a reconfig is happening, bail out */ 8893 if (local->in_reconfig) { 8894 err = -EBUSY; 8895 goto out_err; 8896 } 8897 8898 if (!have_sta) { 8899 if (mlo) 8900 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8901 link_id, cbss->bssid, 8902 GFP_KERNEL); 8903 else 8904 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8905 8906 if (!new_sta) { 8907 err = -ENOMEM; 8908 goto out_err; 8909 } 8910 8911 new_sta->sta.mlo = mlo; 8912 } 8913 8914 /* 8915 * Set up the information for the new channel before setting the 8916 * new channel. We can't - completely race-free - change the basic 8917 * rates bitmap and the channel (sband) that it refers to, but if 8918 * we set it up before we at least avoid calling into the driver's 8919 * bss_info_changed() method with invalid information (since we do 8920 * call that from changing the channel - only for IDLE and perhaps 8921 * some others, but ...). 8922 * 8923 * So to avoid that, just set up all the new information before the 8924 * channel, but tell the driver to apply it only afterwards, since 8925 * it might need the new channel for that. 8926 */ 8927 if (new_sta) { 8928 const struct cfg80211_bss_ies *ies; 8929 struct link_sta_info *link_sta; 8930 8931 rcu_read_lock(); 8932 link_sta = rcu_dereference(new_sta->link[link_id]); 8933 if (WARN_ON(!link_sta)) { 8934 rcu_read_unlock(); 8935 sta_info_free(local, new_sta); 8936 err = -EINVAL; 8937 goto out_err; 8938 } 8939 8940 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8941 link_sta, cbss); 8942 if (err) { 8943 rcu_read_unlock(); 8944 sta_info_free(local, new_sta); 8945 goto out_err; 8946 } 8947 8948 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8949 8950 /* set timing information */ 8951 link->conf->beacon_int = cbss->beacon_interval; 8952 ies = rcu_dereference(cbss->beacon_ies); 8953 if (ies) { 8954 link->conf->sync_tsf = ies->tsf; 8955 link->conf->sync_device_ts = 8956 bss->device_ts_beacon; 8957 8958 ieee80211_get_dtim(ies, 8959 &link->conf->sync_dtim_count, 8960 NULL); 8961 } else if (!ieee80211_hw_check(&sdata->local->hw, 8962 TIMING_BEACON_ONLY)) { 8963 ies = rcu_dereference(cbss->proberesp_ies); 8964 /* must be non-NULL since beacon IEs were NULL */ 8965 link->conf->sync_tsf = ies->tsf; 8966 link->conf->sync_device_ts = 8967 bss->device_ts_presp; 8968 link->conf->sync_dtim_count = 0; 8969 } else { 8970 link->conf->sync_tsf = 0; 8971 link->conf->sync_device_ts = 0; 8972 link->conf->sync_dtim_count = 0; 8973 } 8974 rcu_read_unlock(); 8975 } 8976 8977 if (new_sta || override) { 8978 /* 8979 * Only set this if we're also going to calculate the AP 8980 * settings etc., otherwise this was set before in a 8981 * previous call. Note override is set to %true in assoc 8982 * if the settings were changed. 8983 */ 8984 link->u.mgd.conn = *conn; 8985 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8986 mlo, &link->u.mgd.conn, 8987 userspace_selectors); 8988 if (err) { 8989 if (new_sta) 8990 sta_info_free(local, new_sta); 8991 goto out_err; 8992 } 8993 /* pass out for use in assoc */ 8994 *conn = link->u.mgd.conn; 8995 } 8996 8997 if (new_sta) { 8998 /* 8999 * tell driver about BSSID, basic rates and timing 9000 * this was set up above, before setting the channel 9001 */ 9002 ieee80211_link_info_change_notify(sdata, link, 9003 BSS_CHANGED_BSSID | 9004 BSS_CHANGED_BASIC_RATES | 9005 BSS_CHANGED_BEACON_INT); 9006 9007 if (assoc) 9008 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9009 9010 err = sta_info_insert(new_sta); 9011 new_sta = NULL; 9012 if (err) { 9013 sdata_info(sdata, 9014 "failed to insert STA entry for the AP (error %d)\n", 9015 err); 9016 goto out_release_chan; 9017 } 9018 } else 9019 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9020 9021 /* Cancel scan to ensure that nothing interferes with connection */ 9022 if (local->scanning) 9023 ieee80211_scan_cancel(local); 9024 9025 return 0; 9026 9027 out_release_chan: 9028 ieee80211_link_release_channel(link); 9029 out_err: 9030 ieee80211_vif_set_links(sdata, 0, 0); 9031 return err; 9032 } 9033 9034 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9035 const struct cfg80211_bss_ies *ies, 9036 u8 cur_channel, bool ignore_ecsa) 9037 { 9038 const struct element *csa_elem, *ecsa_elem; 9039 struct ieee80211_channel_sw_ie *csa = NULL; 9040 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9041 9042 if (!ies) 9043 return false; 9044 9045 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9046 ies->data, ies->len); 9047 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9048 csa = (void *)csa_elem->data; 9049 9050 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9051 ies->data, ies->len); 9052 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9053 ecsa = (void *)ecsa_elem->data; 9054 9055 if (csa && csa->count == 0) 9056 csa = NULL; 9057 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9058 csa = NULL; 9059 9060 if (ecsa && ecsa->count == 0) 9061 ecsa = NULL; 9062 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9063 ecsa = NULL; 9064 9065 if (ignore_ecsa && ecsa) { 9066 sdata_info(sdata, 9067 "Ignoring ECSA in probe response - was considered stuck!\n"); 9068 return csa; 9069 } 9070 9071 return csa || ecsa; 9072 } 9073 9074 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9075 struct cfg80211_bss *bss) 9076 { 9077 u8 cur_channel; 9078 bool ret; 9079 9080 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9081 9082 rcu_read_lock(); 9083 if (ieee80211_mgd_csa_present(sdata, 9084 rcu_dereference(bss->beacon_ies), 9085 cur_channel, false)) { 9086 ret = true; 9087 goto out; 9088 } 9089 9090 if (ieee80211_mgd_csa_present(sdata, 9091 rcu_dereference(bss->proberesp_ies), 9092 cur_channel, bss->proberesp_ecsa_stuck)) { 9093 ret = true; 9094 goto out; 9095 } 9096 9097 ret = false; 9098 out: 9099 rcu_read_unlock(); 9100 return ret; 9101 } 9102 9103 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9104 const u8 *supported_selectors, 9105 u8 supported_selectors_len) 9106 { 9107 if (supported_selectors) { 9108 for (int i = 0; i < supported_selectors_len; i++) { 9109 set_bit(supported_selectors[i], 9110 userspace_selectors); 9111 } 9112 } else { 9113 /* Assume SAE_H2E support for backward compatibility. */ 9114 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9115 userspace_selectors); 9116 } 9117 } 9118 9119 /* config hooks */ 9120 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9121 struct cfg80211_auth_request *req) 9122 { 9123 struct ieee80211_local *local = sdata->local; 9124 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9125 struct ieee80211_mgd_auth_data *auth_data; 9126 struct ieee80211_conn_settings conn; 9127 struct ieee80211_link_data *link; 9128 struct ieee80211_supported_band *sband; 9129 struct ieee80211_bss *bss; 9130 u16 auth_alg; 9131 int err; 9132 bool cont_auth, wmm_used; 9133 9134 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9135 9136 /* prepare auth data structure */ 9137 9138 switch (req->auth_type) { 9139 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9140 auth_alg = WLAN_AUTH_OPEN; 9141 break; 9142 case NL80211_AUTHTYPE_SHARED_KEY: 9143 if (fips_enabled) 9144 return -EOPNOTSUPP; 9145 auth_alg = WLAN_AUTH_SHARED_KEY; 9146 break; 9147 case NL80211_AUTHTYPE_FT: 9148 auth_alg = WLAN_AUTH_FT; 9149 break; 9150 case NL80211_AUTHTYPE_NETWORK_EAP: 9151 auth_alg = WLAN_AUTH_LEAP; 9152 break; 9153 case NL80211_AUTHTYPE_SAE: 9154 auth_alg = WLAN_AUTH_SAE; 9155 break; 9156 case NL80211_AUTHTYPE_FILS_SK: 9157 auth_alg = WLAN_AUTH_FILS_SK; 9158 break; 9159 case NL80211_AUTHTYPE_FILS_SK_PFS: 9160 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9161 break; 9162 case NL80211_AUTHTYPE_FILS_PK: 9163 auth_alg = WLAN_AUTH_FILS_PK; 9164 break; 9165 default: 9166 return -EOPNOTSUPP; 9167 } 9168 9169 if (ifmgd->assoc_data) 9170 return -EBUSY; 9171 9172 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9173 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9174 return -EINVAL; 9175 } 9176 9177 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9178 req->ie_len, GFP_KERNEL); 9179 if (!auth_data) 9180 return -ENOMEM; 9181 9182 memcpy(auth_data->ap_addr, 9183 req->ap_mld_addr ?: req->bss->bssid, 9184 ETH_ALEN); 9185 auth_data->bss = req->bss; 9186 auth_data->link_id = req->link_id; 9187 9188 if (req->auth_data_len >= 4) { 9189 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9190 __le16 *pos = (__le16 *) req->auth_data; 9191 9192 auth_data->sae_trans = le16_to_cpu(pos[0]); 9193 auth_data->sae_status = le16_to_cpu(pos[1]); 9194 } 9195 memcpy(auth_data->data, req->auth_data + 4, 9196 req->auth_data_len - 4); 9197 auth_data->data_len += req->auth_data_len - 4; 9198 } 9199 9200 /* Check if continuing authentication or trying to authenticate with the 9201 * same BSS that we were in the process of authenticating with and avoid 9202 * removal and re-addition of the STA entry in 9203 * ieee80211_prep_connection(). 9204 */ 9205 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9206 ifmgd->auth_data->link_id == req->link_id; 9207 9208 if (req->ie && req->ie_len) { 9209 memcpy(&auth_data->data[auth_data->data_len], 9210 req->ie, req->ie_len); 9211 auth_data->data_len += req->ie_len; 9212 } 9213 9214 if (req->key && req->key_len) { 9215 auth_data->key_len = req->key_len; 9216 auth_data->key_idx = req->key_idx; 9217 memcpy(auth_data->key, req->key, req->key_len); 9218 } 9219 9220 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9221 req->supported_selectors, 9222 req->supported_selectors_len); 9223 9224 auth_data->algorithm = auth_alg; 9225 9226 /* try to authenticate/probe */ 9227 9228 if (ifmgd->auth_data) { 9229 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9230 auth_data->peer_confirmed = 9231 ifmgd->auth_data->peer_confirmed; 9232 } 9233 ieee80211_destroy_auth_data(sdata, cont_auth); 9234 } 9235 9236 /* prep auth_data so we don't go into idle on disassoc */ 9237 ifmgd->auth_data = auth_data; 9238 9239 /* If this is continuation of an ongoing SAE authentication exchange 9240 * (i.e., request to send SAE Confirm) and the peer has already 9241 * confirmed, mark authentication completed since we are about to send 9242 * out SAE Confirm. 9243 */ 9244 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9245 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9246 ieee80211_mark_sta_auth(sdata); 9247 9248 if (ifmgd->associated) { 9249 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9250 9251 sdata_info(sdata, 9252 "disconnect from AP %pM for new auth to %pM\n", 9253 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9254 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9255 WLAN_REASON_UNSPECIFIED, 9256 false, frame_buf); 9257 9258 ieee80211_report_disconnect(sdata, frame_buf, 9259 sizeof(frame_buf), true, 9260 WLAN_REASON_UNSPECIFIED, 9261 false); 9262 } 9263 9264 /* needed for transmitting the auth frame(s) properly */ 9265 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9266 9267 bss = (void *)req->bss->priv; 9268 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9269 9270 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9271 9272 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9273 &conn); 9274 9275 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9276 req->ap_mld_addr, cont_auth, 9277 &conn, false, 9278 auth_data->userspace_selectors); 9279 if (err) 9280 goto err_clear; 9281 9282 if (req->link_id >= 0) 9283 link = sdata_dereference(sdata->link[req->link_id], sdata); 9284 else 9285 link = &sdata->deflink; 9286 9287 if (WARN_ON(!link)) { 9288 err = -ENOLINK; 9289 goto err_clear; 9290 } 9291 9292 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9293 auth_data->ap_addr, link->conf->addr); 9294 9295 err = ieee80211_auth(sdata); 9296 if (err) { 9297 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9298 goto err_clear; 9299 } 9300 9301 /* hold our own reference */ 9302 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9303 return 0; 9304 9305 err_clear: 9306 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9307 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9308 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9309 BSS_CHANGED_BSSID); 9310 ieee80211_link_release_channel(&sdata->deflink); 9311 } 9312 ifmgd->auth_data = NULL; 9313 kfree(auth_data); 9314 return err; 9315 } 9316 9317 static void 9318 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9319 struct ieee80211_mgd_assoc_data *assoc_data, 9320 struct cfg80211_assoc_request *req, 9321 struct ieee80211_conn_settings *conn, 9322 unsigned int link_id) 9323 { 9324 struct ieee80211_local *local = sdata->local; 9325 const struct cfg80211_bss_ies *bss_ies; 9326 struct ieee80211_supported_band *sband; 9327 struct ieee80211_link_data *link; 9328 struct cfg80211_bss *cbss; 9329 struct ieee80211_bss *bss; 9330 9331 cbss = assoc_data->link[link_id].bss; 9332 if (WARN_ON(!cbss)) 9333 return; 9334 9335 bss = (void *)cbss->priv; 9336 9337 sband = local->hw.wiphy->bands[cbss->channel->band]; 9338 if (WARN_ON(!sband)) 9339 return; 9340 9341 link = sdata_dereference(sdata->link[link_id], sdata); 9342 if (WARN_ON(!link)) 9343 return; 9344 9345 /* for MLO connections assume advertising all rates is OK */ 9346 if (!req->ap_mld_addr) { 9347 assoc_data->supp_rates = bss->supp_rates; 9348 assoc_data->supp_rates_len = bss->supp_rates_len; 9349 } 9350 9351 /* copy and link elems for the STA profile */ 9352 if (req->links[link_id].elems_len) { 9353 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9354 req->links[link_id].elems_len); 9355 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9356 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9357 assoc_data->ie_pos += req->links[link_id].elems_len; 9358 } 9359 9360 link->u.mgd.beacon_crc_valid = false; 9361 link->u.mgd.dtim_period = 0; 9362 link->u.mgd.have_beacon = false; 9363 9364 /* override HT configuration only if the AP and we support it */ 9365 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9366 struct ieee80211_sta_ht_cap sta_ht_cap; 9367 9368 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9369 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9370 } 9371 9372 rcu_read_lock(); 9373 bss_ies = rcu_dereference(cbss->beacon_ies); 9374 if (bss_ies) { 9375 u8 dtim_count = 0; 9376 9377 ieee80211_get_dtim(bss_ies, &dtim_count, 9378 &link->u.mgd.dtim_period); 9379 9380 sdata->deflink.u.mgd.have_beacon = true; 9381 9382 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9383 link->conf->sync_tsf = bss_ies->tsf; 9384 link->conf->sync_device_ts = bss->device_ts_beacon; 9385 link->conf->sync_dtim_count = dtim_count; 9386 } 9387 } else { 9388 bss_ies = rcu_dereference(cbss->ies); 9389 } 9390 9391 if (bss_ies) { 9392 const struct element *elem; 9393 9394 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9395 bss_ies->data, bss_ies->len); 9396 if (elem && elem->datalen >= 3) 9397 link->conf->profile_periodicity = elem->data[2]; 9398 else 9399 link->conf->profile_periodicity = 0; 9400 9401 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9402 bss_ies->data, bss_ies->len); 9403 if (elem && elem->datalen >= 11 && 9404 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9405 link->conf->ema_ap = true; 9406 else 9407 link->conf->ema_ap = false; 9408 } 9409 rcu_read_unlock(); 9410 9411 if (bss->corrupt_data) { 9412 char *corrupt_type = "data"; 9413 9414 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9415 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9416 corrupt_type = "beacon and probe response"; 9417 else 9418 corrupt_type = "beacon"; 9419 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9420 corrupt_type = "probe response"; 9421 } 9422 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9423 cbss->bssid, corrupt_type); 9424 } 9425 9426 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9427 if (sdata->u.mgd.powersave) 9428 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9429 else 9430 link->smps_mode = IEEE80211_SMPS_OFF; 9431 } else { 9432 link->smps_mode = link->u.mgd.req_smps; 9433 } 9434 } 9435 9436 static int 9437 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9438 struct ieee80211_mgd_assoc_data *assoc_data, 9439 int link_id) 9440 { 9441 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9442 enum nl80211_band band = cbss->channel->band; 9443 struct ieee80211_supported_band *sband; 9444 const struct element *elem; 9445 int err; 9446 9447 /* neither HT nor VHT elements used on 6 GHz */ 9448 if (band == NL80211_BAND_6GHZ) 9449 return 0; 9450 9451 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9452 return 0; 9453 9454 rcu_read_lock(); 9455 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9456 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9457 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9458 cbss->bssid); 9459 err = -EINVAL; 9460 goto out_rcu; 9461 } 9462 assoc_data->link[link_id].ap_ht_param = 9463 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9464 rcu_read_unlock(); 9465 9466 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9467 return 0; 9468 9469 /* some drivers want to support VHT on 2.4 GHz even */ 9470 sband = sdata->local->hw.wiphy->bands[band]; 9471 if (!sband->vht_cap.vht_supported) 9472 return 0; 9473 9474 rcu_read_lock(); 9475 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9476 /* but even then accept it not being present on the AP */ 9477 if (!elem && band == NL80211_BAND_2GHZ) { 9478 err = 0; 9479 goto out_rcu; 9480 } 9481 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9482 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9483 cbss->bssid); 9484 err = -EINVAL; 9485 goto out_rcu; 9486 } 9487 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9488 sizeof(struct ieee80211_vht_cap)); 9489 rcu_read_unlock(); 9490 9491 return 0; 9492 out_rcu: 9493 rcu_read_unlock(); 9494 return err; 9495 } 9496 9497 static bool 9498 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9499 { 9500 const struct cfg80211_bss_ies *ies; 9501 struct cfg80211_bss *bss; 9502 const struct element *ml; 9503 9504 /* not an MLO connection if link_id < 0, so irrelevant */ 9505 if (req->link_id < 0) 9506 return false; 9507 9508 bss = req->links[req->link_id].bss; 9509 9510 guard(rcu)(); 9511 ies = rcu_dereference(bss->ies); 9512 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9513 ies->data, ies->len) { 9514 const struct ieee80211_multi_link_elem *mle; 9515 9516 if (!ieee80211_mle_type_ok(ml->data + 1, 9517 IEEE80211_ML_CONTROL_TYPE_BASIC, 9518 ml->datalen - 1)) 9519 continue; 9520 9521 mle = (void *)(ml->data + 1); 9522 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9523 return true; 9524 } 9525 9526 return false; 9527 9528 } 9529 9530 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9531 struct cfg80211_assoc_request *req) 9532 { 9533 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9534 struct ieee80211_local *local = sdata->local; 9535 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9536 struct ieee80211_mgd_assoc_data *assoc_data; 9537 const struct element *ssid_elem; 9538 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9539 struct ieee80211_link_data *link; 9540 struct cfg80211_bss *cbss; 9541 bool override, uapsd_supported; 9542 bool match_auth; 9543 int i, err; 9544 size_t size = sizeof(*assoc_data) + req->ie_len; 9545 9546 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9547 size += req->links[i].elems_len; 9548 9549 /* FIXME: no support for 4-addr MLO yet */ 9550 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9551 return -EOPNOTSUPP; 9552 9553 assoc_data = kzalloc(size, GFP_KERNEL); 9554 if (!assoc_data) 9555 return -ENOMEM; 9556 9557 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9558 9559 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9560 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9561 err = -EINVAL; 9562 goto err_free; 9563 } 9564 9565 rcu_read_lock(); 9566 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9567 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9568 rcu_read_unlock(); 9569 err = -EINVAL; 9570 goto err_free; 9571 } 9572 9573 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9574 assoc_data->ssid_len = ssid_elem->datalen; 9575 rcu_read_unlock(); 9576 9577 if (req->ap_mld_addr) 9578 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9579 else 9580 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9581 9582 /* 9583 * Many APs have broken parsing of the extended MLD capa/ops field, 9584 * dropping (re-)association request frames or replying with association 9585 * response with a failure status if it's present. 9586 * Set our value from the userspace request only in strict mode or if 9587 * the AP also had that field present. 9588 */ 9589 if (ieee80211_hw_check(&local->hw, STRICT) || 9590 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9591 assoc_data->ext_mld_capa_ops = 9592 cpu_to_le16(req->ext_mld_capa_ops); 9593 9594 if (ifmgd->associated) { 9595 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9596 9597 sdata_info(sdata, 9598 "disconnect from AP %pM for new assoc to %pM\n", 9599 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9600 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9601 WLAN_REASON_UNSPECIFIED, 9602 false, frame_buf); 9603 9604 ieee80211_report_disconnect(sdata, frame_buf, 9605 sizeof(frame_buf), true, 9606 WLAN_REASON_UNSPECIFIED, 9607 false); 9608 } 9609 9610 memset(sdata->u.mgd.userspace_selectors, 0, 9611 sizeof(sdata->u.mgd.userspace_selectors)); 9612 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9613 req->supported_selectors, 9614 req->supported_selectors_len); 9615 9616 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9617 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9618 sizeof(ifmgd->ht_capa_mask)); 9619 9620 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9621 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9622 sizeof(ifmgd->vht_capa_mask)); 9623 9624 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9625 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9626 sizeof(ifmgd->s1g_capa_mask)); 9627 9628 /* keep some setup (AP STA, channel, ...) if matching */ 9629 match_auth = ifmgd->auth_data && 9630 ether_addr_equal(ifmgd->auth_data->ap_addr, 9631 assoc_data->ap_addr) && 9632 ifmgd->auth_data->link_id == req->link_id; 9633 9634 if (req->ap_mld_addr) { 9635 uapsd_supported = true; 9636 9637 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9638 ASSOC_REQ_DISABLE_VHT | 9639 ASSOC_REQ_DISABLE_HE | 9640 ASSOC_REQ_DISABLE_EHT)) { 9641 err = -EINVAL; 9642 goto err_free; 9643 } 9644 9645 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9646 struct ieee80211_supported_band *sband; 9647 struct cfg80211_bss *link_cbss = req->links[i].bss; 9648 struct ieee80211_bss *bss; 9649 9650 if (!link_cbss) 9651 continue; 9652 9653 bss = (void *)link_cbss->priv; 9654 9655 if (!bss->wmm_used) { 9656 err = -EINVAL; 9657 req->links[i].error = err; 9658 goto err_free; 9659 } 9660 9661 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9662 err = -EINVAL; 9663 req->links[i].error = err; 9664 goto err_free; 9665 } 9666 9667 link = sdata_dereference(sdata->link[i], sdata); 9668 if (link) 9669 ether_addr_copy(assoc_data->link[i].addr, 9670 link->conf->addr); 9671 else 9672 eth_random_addr(assoc_data->link[i].addr); 9673 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9674 9675 if (match_auth && i == assoc_link_id && link) 9676 assoc_data->link[i].conn = link->u.mgd.conn; 9677 else 9678 assoc_data->link[i].conn = 9679 ieee80211_conn_settings_unlimited; 9680 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9681 req, true, i, 9682 &assoc_data->link[i].conn); 9683 assoc_data->link[i].bss = link_cbss; 9684 assoc_data->link[i].disabled = req->links[i].disabled; 9685 9686 if (!bss->uapsd_supported) 9687 uapsd_supported = false; 9688 9689 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9690 err = -EINVAL; 9691 req->links[i].error = err; 9692 goto err_free; 9693 } 9694 9695 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9696 assoc_data, i); 9697 if (err) { 9698 err = -EINVAL; 9699 req->links[i].error = err; 9700 goto err_free; 9701 } 9702 } 9703 9704 assoc_data->wmm = true; 9705 } else { 9706 struct ieee80211_supported_band *sband; 9707 struct ieee80211_bss *bss = (void *)cbss->priv; 9708 9709 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9710 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9711 9712 assoc_data->wmm = bss->wmm_used && 9713 (local->hw.queues >= IEEE80211_NUM_ACS); 9714 9715 if (cbss->channel->band == NL80211_BAND_6GHZ && 9716 req->flags & (ASSOC_REQ_DISABLE_HT | 9717 ASSOC_REQ_DISABLE_VHT | 9718 ASSOC_REQ_DISABLE_HE)) { 9719 err = -EINVAL; 9720 goto err_free; 9721 } 9722 9723 sband = local->hw.wiphy->bands[cbss->channel->band]; 9724 9725 assoc_data->link[0].bss = cbss; 9726 9727 if (match_auth) 9728 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9729 else 9730 assoc_data->link[0].conn = 9731 ieee80211_conn_settings_unlimited; 9732 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9733 assoc_data->wmm, 0, 9734 &assoc_data->link[0].conn); 9735 9736 uapsd_supported = bss->uapsd_supported; 9737 9738 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9739 if (err) 9740 goto err_free; 9741 } 9742 9743 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9744 9745 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9746 err = -EBUSY; 9747 goto err_free; 9748 } 9749 9750 if (ifmgd->assoc_data) { 9751 err = -EBUSY; 9752 goto err_free; 9753 } 9754 9755 /* Cleanup is delayed if auth_data matches */ 9756 if (ifmgd->auth_data && !match_auth) 9757 ieee80211_destroy_auth_data(sdata, false); 9758 9759 if (req->ie && req->ie_len) { 9760 memcpy(assoc_data->ie, req->ie, req->ie_len); 9761 assoc_data->ie_len = req->ie_len; 9762 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9763 } else { 9764 assoc_data->ie_pos = assoc_data->ie; 9765 } 9766 9767 if (req->fils_kek) { 9768 /* should already be checked in cfg80211 - so warn */ 9769 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9770 err = -EINVAL; 9771 goto err_free; 9772 } 9773 memcpy(assoc_data->fils_kek, req->fils_kek, 9774 req->fils_kek_len); 9775 assoc_data->fils_kek_len = req->fils_kek_len; 9776 } 9777 9778 if (req->fils_nonces) 9779 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9780 2 * FILS_NONCE_LEN); 9781 9782 /* default timeout */ 9783 assoc_data->timeout = jiffies; 9784 assoc_data->timeout_started = true; 9785 9786 assoc_data->assoc_link_id = assoc_link_id; 9787 9788 if (req->ap_mld_addr) { 9789 /* if there was no authentication, set up the link */ 9790 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9791 if (err) 9792 goto err_clear; 9793 } 9794 9795 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9796 if (WARN_ON(!link)) { 9797 err = -EINVAL; 9798 goto err_clear; 9799 } 9800 9801 override = link->u.mgd.conn.mode != 9802 assoc_data->link[assoc_link_id].conn.mode || 9803 link->u.mgd.conn.bw_limit != 9804 assoc_data->link[assoc_link_id].conn.bw_limit; 9805 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9806 9807 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9808 assoc_link_id); 9809 9810 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9811 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9812 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9813 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9814 9815 if (assoc_data->wmm && uapsd_supported && 9816 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9817 assoc_data->uapsd = true; 9818 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9819 } else { 9820 assoc_data->uapsd = false; 9821 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9822 } 9823 9824 if (req->prev_bssid) 9825 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9826 9827 if (req->use_mfp) { 9828 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9829 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9830 } else { 9831 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9832 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9833 } 9834 9835 if (req->flags & ASSOC_REQ_USE_RRM) 9836 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9837 else 9838 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9839 9840 if (req->crypto.control_port) 9841 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9842 else 9843 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9844 9845 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9846 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9847 sdata->control_port_over_nl80211 = 9848 req->crypto.control_port_over_nl80211; 9849 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9850 9851 /* kick off associate process */ 9852 ifmgd->assoc_data = assoc_data; 9853 9854 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9855 if (!assoc_data->link[i].bss) 9856 continue; 9857 if (i == assoc_data->assoc_link_id) 9858 continue; 9859 /* only calculate the mode, hence link == NULL */ 9860 err = ieee80211_prep_channel(sdata, NULL, i, 9861 assoc_data->link[i].bss, true, 9862 &assoc_data->link[i].conn, 9863 sdata->u.mgd.userspace_selectors); 9864 if (err) { 9865 req->links[i].error = err; 9866 goto err_clear; 9867 } 9868 } 9869 9870 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9871 vif_cfg->ssid_len = assoc_data->ssid_len; 9872 9873 /* needed for transmitting the assoc frames properly */ 9874 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9875 9876 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9877 req->ap_mld_addr, true, 9878 &assoc_data->link[assoc_link_id].conn, 9879 override, 9880 sdata->u.mgd.userspace_selectors); 9881 if (err) 9882 goto err_clear; 9883 9884 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9885 const struct cfg80211_bss_ies *beacon_ies; 9886 9887 rcu_read_lock(); 9888 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9889 if (!beacon_ies) { 9890 /* 9891 * Wait up to one beacon interval ... 9892 * should this be more if we miss one? 9893 */ 9894 sdata_info(sdata, "waiting for beacon from %pM\n", 9895 link->u.mgd.bssid); 9896 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9897 assoc_data->timeout_started = true; 9898 assoc_data->need_beacon = true; 9899 } 9900 rcu_read_unlock(); 9901 } 9902 9903 run_again(sdata, assoc_data->timeout); 9904 9905 /* We are associating, clean up auth_data */ 9906 if (ifmgd->auth_data) 9907 ieee80211_destroy_auth_data(sdata, true); 9908 9909 return 0; 9910 err_clear: 9911 if (!ifmgd->auth_data) { 9912 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9913 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9914 BSS_CHANGED_BSSID); 9915 } 9916 ifmgd->assoc_data = NULL; 9917 err_free: 9918 kfree(assoc_data); 9919 return err; 9920 } 9921 9922 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9923 struct cfg80211_deauth_request *req) 9924 { 9925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9926 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9927 bool tx = !req->local_state_change; 9928 struct ieee80211_prep_tx_info info = { 9929 .subtype = IEEE80211_STYPE_DEAUTH, 9930 }; 9931 9932 if (ifmgd->auth_data && 9933 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9934 sdata_info(sdata, 9935 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9936 req->bssid, req->reason_code, 9937 ieee80211_get_reason_code_string(req->reason_code)); 9938 9939 info.link_id = ifmgd->auth_data->link_id; 9940 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9941 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9942 IEEE80211_STYPE_DEAUTH, 9943 req->reason_code, tx, 9944 frame_buf); 9945 ieee80211_destroy_auth_data(sdata, false); 9946 ieee80211_report_disconnect(sdata, frame_buf, 9947 sizeof(frame_buf), true, 9948 req->reason_code, false); 9949 drv_mgd_complete_tx(sdata->local, sdata, &info); 9950 return 0; 9951 } 9952 9953 if (ifmgd->assoc_data && 9954 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9955 sdata_info(sdata, 9956 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9957 req->bssid, req->reason_code, 9958 ieee80211_get_reason_code_string(req->reason_code)); 9959 9960 info.link_id = ifmgd->assoc_data->assoc_link_id; 9961 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9962 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9963 IEEE80211_STYPE_DEAUTH, 9964 req->reason_code, tx, 9965 frame_buf); 9966 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9967 ieee80211_report_disconnect(sdata, frame_buf, 9968 sizeof(frame_buf), true, 9969 req->reason_code, false); 9970 drv_mgd_complete_tx(sdata->local, sdata, &info); 9971 return 0; 9972 } 9973 9974 if (ifmgd->associated && 9975 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9976 sdata_info(sdata, 9977 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9978 req->bssid, req->reason_code, 9979 ieee80211_get_reason_code_string(req->reason_code)); 9980 9981 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9982 req->reason_code, tx, frame_buf); 9983 ieee80211_report_disconnect(sdata, frame_buf, 9984 sizeof(frame_buf), true, 9985 req->reason_code, false); 9986 return 0; 9987 } 9988 9989 return -ENOTCONN; 9990 } 9991 9992 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9993 struct cfg80211_disassoc_request *req) 9994 { 9995 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9996 9997 if (!sdata->u.mgd.associated || 9998 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9999 return -ENOTCONN; 10000 10001 sdata_info(sdata, 10002 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10003 req->ap_addr, req->reason_code, 10004 ieee80211_get_reason_code_string(req->reason_code)); 10005 10006 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10007 req->reason_code, !req->local_state_change, 10008 frame_buf); 10009 10010 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10011 req->reason_code, false); 10012 10013 return 0; 10014 } 10015 10016 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10017 { 10018 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10019 &link->u.mgd.request_smps_work); 10020 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10021 &link->u.mgd.recalc_smps); 10022 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 10023 &link->u.mgd.csa.switch_work); 10024 } 10025 10026 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10027 { 10028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10029 10030 /* 10031 * Make sure some work items will not run after this, 10032 * they will not do anything but might not have been 10033 * cancelled when disconnecting. 10034 */ 10035 wiphy_work_cancel(sdata->local->hw.wiphy, 10036 &ifmgd->monitor_work); 10037 wiphy_work_cancel(sdata->local->hw.wiphy, 10038 &ifmgd->beacon_connection_loss_work); 10039 wiphy_work_cancel(sdata->local->hw.wiphy, 10040 &ifmgd->csa_connection_drop_work); 10041 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10042 &ifmgd->tdls_peer_del_work); 10043 10044 if (ifmgd->assoc_data) 10045 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10046 if (ifmgd->auth_data) 10047 ieee80211_destroy_auth_data(sdata, false); 10048 spin_lock_bh(&ifmgd->teardown_lock); 10049 if (ifmgd->teardown_skb) { 10050 kfree_skb(ifmgd->teardown_skb); 10051 ifmgd->teardown_skb = NULL; 10052 ifmgd->orig_teardown_skb = NULL; 10053 } 10054 kfree(ifmgd->assoc_req_ies); 10055 ifmgd->assoc_req_ies = NULL; 10056 ifmgd->assoc_req_ies_len = 0; 10057 spin_unlock_bh(&ifmgd->teardown_lock); 10058 timer_delete_sync(&ifmgd->timer); 10059 } 10060 10061 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10062 enum nl80211_cqm_rssi_threshold_event rssi_event, 10063 s32 rssi_level, 10064 gfp_t gfp) 10065 { 10066 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10067 10068 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10069 10070 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10071 } 10072 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10073 10074 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10075 { 10076 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10077 10078 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10079 10080 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10081 } 10082 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10083 10084 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10085 int rssi_min_thold, 10086 int rssi_max_thold) 10087 { 10088 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10089 10090 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10091 return; 10092 10093 /* 10094 * Scale up threshold values before storing it, as the RSSI averaging 10095 * algorithm uses a scaled up value as well. Change this scaling 10096 * factor if the RSSI averaging algorithm changes. 10097 */ 10098 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10099 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10100 } 10101 10102 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10103 int rssi_min_thold, 10104 int rssi_max_thold) 10105 { 10106 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10107 10108 WARN_ON(rssi_min_thold == rssi_max_thold || 10109 rssi_min_thold > rssi_max_thold); 10110 10111 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10112 rssi_max_thold); 10113 } 10114 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10115 10116 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10117 { 10118 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10119 10120 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10121 } 10122 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10123 10124 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10125 struct ieee80211_mgmt *mgmt, size_t len) 10126 { 10127 struct ieee80211_local *local = sdata->local; 10128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10129 struct ieee80211_mgd_assoc_data *add_links_data = 10130 ifmgd->reconf.add_links_data; 10131 struct sta_info *sta; 10132 struct cfg80211_mlo_reconf_done_data done_data = {}; 10133 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10134 sdata->u.mgd.reconf.removed_links; 10135 u16 link_mask, valid_links; 10136 unsigned int link_id; 10137 size_t orig_len = len; 10138 u8 i, group_key_data_len; 10139 u8 *pos; 10140 10141 if (!ieee80211_vif_is_mld(&sdata->vif) || 10142 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10143 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10144 sdata->u.mgd.reconf.dialog_token || 10145 !sta_changed_links) 10146 return; 10147 10148 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10149 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10150 10151 /* each status duple is 3 octets */ 10152 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10153 sdata_info(sdata, 10154 "mlo: reconf: unexpected len=%zu, count=%u\n", 10155 len, mgmt->u.action.u.ml_reconf_resp.count); 10156 goto disconnect; 10157 } 10158 10159 link_mask = sta_changed_links; 10160 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10161 u16 status = get_unaligned_le16(pos + 1); 10162 10163 link_id = *pos; 10164 10165 if (!(link_mask & BIT(link_id))) { 10166 sdata_info(sdata, 10167 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10168 link_id, sta_changed_links); 10169 goto disconnect; 10170 } 10171 10172 /* clear the corresponding link, to detect the case that 10173 * the same link was included more than one time 10174 */ 10175 link_mask &= ~BIT(link_id); 10176 10177 /* Handle failure to remove links here. Failure to remove added 10178 * links will be done later in the flow. 10179 */ 10180 if (status != WLAN_STATUS_SUCCESS) { 10181 sdata_info(sdata, 10182 "mlo: reconf: failed on link=%u, status=%u\n", 10183 link_id, status); 10184 10185 /* The AP MLD failed to remove a link that was already 10186 * removed locally. As this is not expected behavior, 10187 * disconnect 10188 */ 10189 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10190 goto disconnect; 10191 10192 /* The AP MLD failed to add a link. Remove it from the 10193 * added links. 10194 */ 10195 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10196 } 10197 10198 pos += 3; 10199 len -= 3; 10200 } 10201 10202 if (link_mask) { 10203 sdata_info(sdata, 10204 "mlo: reconf: no response for links=0x%x\n", 10205 link_mask); 10206 goto disconnect; 10207 } 10208 10209 if (!sdata->u.mgd.reconf.added_links) 10210 goto out; 10211 10212 if (len < 1 || len < 1 + *pos) { 10213 sdata_info(sdata, 10214 "mlo: reconf: invalid group key data length"); 10215 goto disconnect; 10216 } 10217 10218 /* The Group Key Data field must be present when links are added. This 10219 * field should be processed by userland. 10220 */ 10221 group_key_data_len = *pos++; 10222 10223 pos += group_key_data_len; 10224 len -= group_key_data_len + 1; 10225 10226 /* Process the information for the added links */ 10227 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10228 if (WARN_ON(!sta)) 10229 goto disconnect; 10230 10231 valid_links = sdata->vif.valid_links; 10232 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10233 if (!add_links_data->link[link_id].bss || 10234 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10235 continue; 10236 10237 valid_links |= BIT(link_id); 10238 if (ieee80211_sta_allocate_link(sta, link_id)) 10239 goto disconnect; 10240 } 10241 10242 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10243 link_mask = 0; 10244 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10245 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10246 struct ieee80211_link_data *link; 10247 struct link_sta_info *link_sta; 10248 u64 changed = 0; 10249 10250 if (!cbss) 10251 continue; 10252 10253 link = sdata_dereference(sdata->link[link_id], sdata); 10254 if (WARN_ON(!link)) 10255 goto disconnect; 10256 10257 link_info(link, 10258 "mlo: reconf: local address %pM, AP link address %pM\n", 10259 add_links_data->link[link_id].addr, 10260 add_links_data->link[link_id].bss->bssid); 10261 10262 link_sta = rcu_dereference_protected(sta->link[link_id], 10263 lockdep_is_held(&local->hw.wiphy->mtx)); 10264 if (WARN_ON(!link_sta)) 10265 goto disconnect; 10266 10267 if (!link->u.mgd.have_beacon) { 10268 const struct cfg80211_bss_ies *ies; 10269 10270 rcu_read_lock(); 10271 ies = rcu_dereference(cbss->beacon_ies); 10272 if (ies) 10273 link->u.mgd.have_beacon = true; 10274 else 10275 ies = rcu_dereference(cbss->ies); 10276 ieee80211_get_dtim(ies, 10277 &link->conf->sync_dtim_count, 10278 &link->u.mgd.dtim_period); 10279 link->conf->beacon_int = cbss->beacon_interval; 10280 rcu_read_unlock(); 10281 } 10282 10283 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10284 10285 link->u.mgd.conn = add_links_data->link[link_id].conn; 10286 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10287 true, &link->u.mgd.conn, 10288 sdata->u.mgd.userspace_selectors)) { 10289 link_info(link, "mlo: reconf: prep_channel failed\n"); 10290 goto disconnect; 10291 } 10292 10293 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10294 add_links_data->link[link_id].bss)) 10295 goto disconnect; 10296 10297 if (!ieee80211_assoc_config_link(link, link_sta, 10298 add_links_data->link[link_id].bss, 10299 mgmt, pos, len, 10300 &changed)) 10301 goto disconnect; 10302 10303 /* The AP MLD indicated success for this link, but the station 10304 * profile status indicated otherwise. Since there is an 10305 * inconsistency in the ML reconfiguration response, disconnect 10306 */ 10307 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10308 goto disconnect; 10309 10310 ieee80211_sta_init_nss(link_sta); 10311 if (ieee80211_sta_activate_link(sta, link_id)) 10312 goto disconnect; 10313 10314 changed |= ieee80211_link_set_associated(link, cbss); 10315 ieee80211_link_info_change_notify(sdata, link, changed); 10316 10317 ieee80211_recalc_smps(sdata, link); 10318 link_mask |= BIT(link_id); 10319 } 10320 10321 sdata_info(sdata, 10322 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10323 valid_links, link_mask); 10324 10325 /* links might have changed due to rejected ones, set them again */ 10326 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10327 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10328 10329 ieee80211_recalc_ps(local); 10330 ieee80211_recalc_ps_vif(sdata); 10331 10332 done_data.buf = (const u8 *)mgmt; 10333 done_data.len = orig_len; 10334 done_data.added_links = link_mask; 10335 10336 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10337 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10338 done_data.links[link_id].addr = 10339 add_links_data->link[link_id].addr; 10340 } 10341 10342 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10343 kfree(sdata->u.mgd.reconf.add_links_data); 10344 sdata->u.mgd.reconf.add_links_data = NULL; 10345 out: 10346 ieee80211_ml_reconf_reset(sdata); 10347 return; 10348 10349 disconnect: 10350 __ieee80211_disconnect(sdata); 10351 } 10352 10353 static struct sk_buff * 10354 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10355 struct ieee80211_mgd_assoc_data *add_links_data, 10356 u16 removed_links, __le16 ext_mld_capa_ops) 10357 { 10358 struct ieee80211_local *local = sdata->local; 10359 struct ieee80211_mgmt *mgmt; 10360 struct ieee80211_multi_link_elem *ml_elem; 10361 struct ieee80211_mle_basic_common_info *common; 10362 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10363 struct sk_buff *skb; 10364 size_t size; 10365 unsigned int link_id; 10366 __le16 eml_capa = 0, mld_capa_ops = 0; 10367 struct ieee80211_tx_info *info; 10368 u8 common_size, var_common_size; 10369 u8 *ml_elem_len; 10370 u16 capab = 0; 10371 10372 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10373 10374 /* Consider the maximal length of the reconfiguration ML element */ 10375 size += sizeof(struct ieee80211_multi_link_elem); 10376 10377 /* The Basic ML element and the Reconfiguration ML element have the same 10378 * fixed common information fields in the context of ML reconfiguration 10379 * action frame. The AP MLD MAC address must always be present 10380 */ 10381 common_size = sizeof(*common); 10382 10383 /* when adding links, the MLD capabilities must be present */ 10384 var_common_size = 0; 10385 if (add_links_data) { 10386 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10387 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10388 ieee80211_vif_type_p2p(&sdata->vif)); 10389 10390 if (ift_ext_capa) { 10391 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10392 mld_capa_ops = 10393 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10394 } 10395 10396 /* MLD capabilities and operation */ 10397 var_common_size += 2; 10398 10399 /* EML capabilities */ 10400 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10401 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10402 var_common_size += 2; 10403 } 10404 10405 if (ext_mld_capa_ops) 10406 var_common_size += 2; 10407 10408 /* Add the common information length */ 10409 size += common_size + var_common_size; 10410 10411 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10412 struct cfg80211_bss *cbss; 10413 size_t elems_len; 10414 10415 if (removed_links & BIT(link_id)) { 10416 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10417 ETH_ALEN; 10418 continue; 10419 } 10420 10421 if (!add_links_data || !add_links_data->link[link_id].bss) 10422 continue; 10423 10424 elems_len = add_links_data->link[link_id].elems_len; 10425 cbss = add_links_data->link[link_id].bss; 10426 10427 /* should be the same across all BSSes */ 10428 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10429 capab |= WLAN_CAPABILITY_PRIVACY; 10430 10431 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10432 ETH_ALEN; 10433 10434 /* WMM */ 10435 size += 9; 10436 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10437 elems_len); 10438 } 10439 10440 skb = alloc_skb(size, GFP_KERNEL); 10441 if (!skb) 10442 return NULL; 10443 10444 skb_reserve(skb, local->hw.extra_tx_headroom); 10445 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10446 u.action.u.ml_reconf_req)); 10447 10448 /* Add the MAC header */ 10449 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10450 IEEE80211_STYPE_ACTION); 10451 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10452 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10453 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10454 10455 /* Add the action frame fixed fields */ 10456 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10457 mgmt->u.action.u.ml_reconf_req.action_code = 10458 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10459 10460 /* allocate a dialog token and store it */ 10461 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10462 mgmt->u.action.u.ml_reconf_req.dialog_token = 10463 sdata->u.mgd.reconf.dialog_token; 10464 10465 /* Add the ML reconfiguration element and the common information */ 10466 skb_put_u8(skb, WLAN_EID_EXTENSION); 10467 ml_elem_len = skb_put(skb, 1); 10468 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10469 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10470 ml_elem->control = 10471 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10472 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10473 common = skb_put(skb, common_size); 10474 common->len = common_size + var_common_size; 10475 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10476 10477 if (add_links_data) { 10478 if (eml_capa & 10479 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10480 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10481 ml_elem->control |= 10482 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10483 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10484 } 10485 10486 ml_elem->control |= 10487 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10488 10489 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10490 } 10491 10492 if (ext_mld_capa_ops) { 10493 ml_elem->control |= 10494 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10495 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10496 } 10497 10498 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10499 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10500 10501 /* Add the per station profile */ 10502 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10503 u8 *subelem_len = NULL; 10504 u16 ctrl; 10505 const u8 *addr; 10506 10507 /* Skip links that are not changing */ 10508 if (!(removed_links & BIT(link_id)) && 10509 (!add_links_data || !add_links_data->link[link_id].bss)) 10510 continue; 10511 10512 ctrl = link_id | 10513 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10514 10515 if (removed_links & BIT(link_id)) { 10516 struct ieee80211_bss_conf *conf = 10517 sdata_dereference(sdata->vif.link_conf[link_id], 10518 sdata); 10519 if (!conf) 10520 continue; 10521 10522 addr = conf->addr; 10523 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10524 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10525 } else { 10526 addr = add_links_data->link[link_id].addr; 10527 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10528 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10529 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10530 } 10531 10532 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10533 subelem_len = skb_put(skb, 1); 10534 10535 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10536 skb_put_u8(skb, 1 + ETH_ALEN); 10537 skb_put_data(skb, addr, ETH_ALEN); 10538 10539 if (!(removed_links & BIT(link_id))) { 10540 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10541 size_t extra_used; 10542 void *capab_pos; 10543 u8 qos_info; 10544 10545 capab_pos = skb_put(skb, 2); 10546 10547 extra_used = 10548 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10549 add_links_data->link[link_id].elems, 10550 add_links_data->link[link_id].elems_len, 10551 link_id, NULL, 10552 link_present_elems, 10553 add_links_data); 10554 10555 if (add_links_data->link[link_id].elems) 10556 skb_put_data(skb, 10557 add_links_data->link[link_id].elems + 10558 extra_used, 10559 add_links_data->link[link_id].elems_len - 10560 extra_used); 10561 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10562 qos_info = sdata->u.mgd.uapsd_queues; 10563 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10564 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10565 } else { 10566 qos_info = 0; 10567 } 10568 10569 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10570 put_unaligned_le16(capab, capab_pos); 10571 } 10572 10573 ieee80211_fragment_element(skb, subelem_len, 10574 IEEE80211_MLE_SUBELEM_FRAGMENT); 10575 } 10576 10577 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10578 10579 info = IEEE80211_SKB_CB(skb); 10580 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10581 10582 return skb; 10583 } 10584 10585 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10586 struct cfg80211_ml_reconf_req *req) 10587 { 10588 struct ieee80211_local *local = sdata->local; 10589 struct ieee80211_mgd_assoc_data *data = NULL; 10590 struct sta_info *sta; 10591 struct sk_buff *skb; 10592 u16 added_links, new_valid_links; 10593 int link_id, err; 10594 10595 if (!ieee80211_vif_is_mld(&sdata->vif) || 10596 !(sdata->vif.cfg.mld_capa_op & 10597 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10598 return -EINVAL; 10599 10600 /* No support for concurrent ML reconfiguration operation */ 10601 if (sdata->u.mgd.reconf.added_links || 10602 sdata->u.mgd.reconf.removed_links) 10603 return -EBUSY; 10604 10605 added_links = 0; 10606 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10607 if (!req->add_links[link_id].bss) 10608 continue; 10609 10610 added_links |= BIT(link_id); 10611 } 10612 10613 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10614 if (WARN_ON(!sta)) 10615 return -ENOLINK; 10616 10617 /* Adding links to the set of valid link is done only after a successful 10618 * ML reconfiguration frame exchange. Here prepare the data for the ML 10619 * reconfiguration frame construction and allocate the required 10620 * resources 10621 */ 10622 if (added_links) { 10623 bool uapsd_supported; 10624 10625 data = kzalloc(sizeof(*data), GFP_KERNEL); 10626 if (!data) 10627 return -ENOMEM; 10628 10629 data->assoc_link_id = -1; 10630 data->wmm = true; 10631 10632 uapsd_supported = true; 10633 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10634 link_id++) { 10635 struct ieee80211_supported_band *sband; 10636 struct cfg80211_bss *link_cbss = 10637 req->add_links[link_id].bss; 10638 struct ieee80211_bss *bss; 10639 10640 if (!link_cbss) 10641 continue; 10642 10643 bss = (void *)link_cbss->priv; 10644 10645 if (!bss->wmm_used) { 10646 err = -EINVAL; 10647 goto err_free; 10648 } 10649 10650 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10651 err = -EINVAL; 10652 goto err_free; 10653 } 10654 10655 eth_random_addr(data->link[link_id].addr); 10656 data->link[link_id].conn = 10657 ieee80211_conn_settings_unlimited; 10658 sband = 10659 local->hw.wiphy->bands[link_cbss->channel->band]; 10660 10661 ieee80211_determine_our_sta_mode(sdata, sband, 10662 NULL, true, link_id, 10663 &data->link[link_id].conn); 10664 10665 data->link[link_id].bss = link_cbss; 10666 data->link[link_id].disabled = 10667 req->add_links[link_id].disabled; 10668 data->link[link_id].elems = 10669 (u8 *)req->add_links[link_id].elems; 10670 data->link[link_id].elems_len = 10671 req->add_links[link_id].elems_len; 10672 10673 if (!bss->uapsd_supported) 10674 uapsd_supported = false; 10675 10676 if (data->link[link_id].conn.mode < 10677 IEEE80211_CONN_MODE_EHT) { 10678 err = -EINVAL; 10679 goto err_free; 10680 } 10681 10682 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10683 link_id); 10684 if (err) { 10685 err = -EINVAL; 10686 goto err_free; 10687 } 10688 } 10689 10690 /* Require U-APSD support if we enabled it */ 10691 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10692 !uapsd_supported) { 10693 err = -EINVAL; 10694 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10695 goto err_free; 10696 } 10697 10698 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10699 link_id++) { 10700 if (!data->link[link_id].bss) 10701 continue; 10702 10703 /* only used to verify the mode, nothing is allocated */ 10704 err = ieee80211_prep_channel(sdata, NULL, link_id, 10705 data->link[link_id].bss, 10706 true, 10707 &data->link[link_id].conn, 10708 sdata->u.mgd.userspace_selectors); 10709 if (err) 10710 goto err_free; 10711 } 10712 } 10713 10714 /* link removal is done before the ML reconfiguration frame exchange so 10715 * that these links will not be used between their removal by the AP MLD 10716 * and before the station got the ML reconfiguration response. Based on 10717 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10718 * link removal request. 10719 */ 10720 if (req->rem_links) { 10721 u16 new_active_links = 10722 sdata->vif.active_links & ~req->rem_links; 10723 10724 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10725 10726 /* Should not be left with no valid links to perform the 10727 * ML reconfiguration 10728 */ 10729 if (!new_valid_links || 10730 !(new_valid_links & ~sdata->vif.dormant_links)) { 10731 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10732 err = -EINVAL; 10733 goto err_free; 10734 } 10735 10736 if (new_active_links != sdata->vif.active_links) { 10737 if (!new_active_links) 10738 new_active_links = 10739 BIT(__ffs(new_valid_links & 10740 ~sdata->vif.dormant_links)); 10741 10742 err = ieee80211_set_active_links(&sdata->vif, 10743 new_active_links); 10744 if (err) { 10745 sdata_info(sdata, 10746 "mlo: reconf: failed set active links\n"); 10747 goto err_free; 10748 } 10749 } 10750 } 10751 10752 /* Build the SKB before the link removal as the construction of the 10753 * station info for removed links requires the local address. 10754 * Invalidate the removed links, so that the transmission of the ML 10755 * reconfiguration request frame would not be done using them, as the AP 10756 * is expected to send the ML reconfiguration response frame on the link 10757 * on which the request was received. 10758 */ 10759 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10760 cpu_to_le16(req->ext_mld_capa_ops)); 10761 if (!skb) { 10762 err = -ENOMEM; 10763 goto err_free; 10764 } 10765 10766 if (req->rem_links) { 10767 u16 new_dormant_links = 10768 sdata->vif.dormant_links & ~req->rem_links; 10769 10770 err = ieee80211_vif_set_links(sdata, new_valid_links, 10771 new_dormant_links); 10772 if (err) { 10773 sdata_info(sdata, 10774 "mlo: reconf: failed set valid links\n"); 10775 kfree_skb(skb); 10776 goto err_free; 10777 } 10778 10779 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10780 link_id++) { 10781 if (!(req->rem_links & BIT(link_id))) 10782 continue; 10783 10784 ieee80211_sta_remove_link(sta, link_id); 10785 } 10786 10787 /* notify the driver and upper layers */ 10788 ieee80211_vif_cfg_change_notify(sdata, 10789 BSS_CHANGED_MLD_VALID_LINKS); 10790 cfg80211_links_removed(sdata->dev, req->rem_links); 10791 } 10792 10793 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10794 added_links, req->rem_links); 10795 10796 ieee80211_tx_skb(sdata, skb); 10797 10798 sdata->u.mgd.reconf.added_links = added_links; 10799 sdata->u.mgd.reconf.add_links_data = data; 10800 sdata->u.mgd.reconf.removed_links = req->rem_links; 10801 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10802 &sdata->u.mgd.reconf.wk, 10803 IEEE80211_ASSOC_TIMEOUT_SHORT); 10804 return 0; 10805 10806 err_free: 10807 kfree(data); 10808 return err; 10809 } 10810 10811 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10812 { 10813 unsigned long valid_links = sdata->vif.valid_links; 10814 u8 link_id; 10815 10816 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10817 10818 if (!ieee80211_vif_is_mld(&sdata->vif)) 10819 return false; 10820 10821 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10822 struct ieee80211_bss_conf *bss_conf = 10823 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10824 10825 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10826 return false; 10827 } 10828 10829 return true; 10830 } 10831 10832 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10833 { 10834 struct ieee80211_local *local = sdata->local; 10835 struct ieee80211_mgmt *mgmt; 10836 struct sk_buff *skb; 10837 int frame_len = offsetofend(struct ieee80211_mgmt, 10838 u.action.u.epcs) + (enable ? 1 : 0); 10839 10840 if (!ieee80211_mgd_epcs_supp(sdata)) 10841 return -EINVAL; 10842 10843 if (sdata->u.mgd.epcs.enabled == enable && 10844 !sdata->u.mgd.epcs.dialog_token) 10845 return 0; 10846 10847 /* Do not allow enabling EPCS if the AP didn't respond yet. 10848 * However, allow disabling EPCS in such a case. 10849 */ 10850 if (sdata->u.mgd.epcs.dialog_token && enable) 10851 return -EALREADY; 10852 10853 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10854 if (!skb) 10855 return -ENOBUFS; 10856 10857 skb_reserve(skb, local->hw.extra_tx_headroom); 10858 mgmt = skb_put_zero(skb, frame_len); 10859 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10860 IEEE80211_STYPE_ACTION); 10861 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10862 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10863 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10864 10865 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10866 if (enable) { 10867 u8 *pos = mgmt->u.action.u.epcs.variable; 10868 10869 mgmt->u.action.u.epcs.action_code = 10870 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10871 10872 *pos = ++sdata->u.mgd.dialog_token_alloc; 10873 sdata->u.mgd.epcs.dialog_token = *pos; 10874 } else { 10875 mgmt->u.action.u.epcs.action_code = 10876 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10877 10878 ieee80211_epcs_teardown(sdata); 10879 ieee80211_epcs_changed(sdata, false); 10880 } 10881 10882 ieee80211_tx_skb(sdata, skb); 10883 return 0; 10884 } 10885 10886 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10887 struct ieee802_11_elems *elems) 10888 { 10889 const struct element *sub; 10890 size_t scratch_len = elems->ml_epcs_len; 10891 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10892 10893 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10894 10895 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10896 return; 10897 10898 if (WARN_ON(!scratch)) 10899 return; 10900 10901 /* Directly parse the sub elements as the common information doesn't 10902 * hold any useful information. 10903 */ 10904 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10905 elems->ml_epcs_len) { 10906 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10907 struct ieee80211_link_data *link; 10908 u8 *pos = (void *)sub->data; 10909 u16 control; 10910 ssize_t len; 10911 u8 link_id; 10912 10913 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10914 continue; 10915 10916 if (sub->datalen < sizeof(control)) 10917 break; 10918 10919 control = get_unaligned_le16(pos); 10920 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10921 10922 link = sdata_dereference(sdata->link[link_id], sdata); 10923 if (!link) 10924 continue; 10925 10926 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10927 elems->ml_epcs_len, 10928 scratch, scratch_len, 10929 IEEE80211_MLE_SUBELEM_FRAGMENT); 10930 if (len < (ssize_t)sizeof(control)) 10931 continue; 10932 10933 pos = scratch + sizeof(control); 10934 len -= sizeof(control); 10935 10936 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10937 if (!link_elems) 10938 continue; 10939 10940 if (ieee80211_sta_wmm_params(sdata->local, link, 10941 link_elems->wmm_param, 10942 link_elems->wmm_param_len, 10943 link_elems->mu_edca_param_set)) 10944 ieee80211_link_info_change_notify(sdata, link, 10945 BSS_CHANGED_QOS); 10946 } 10947 } 10948 10949 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10950 struct ieee80211_mgmt *mgmt, size_t len) 10951 { 10952 struct ieee802_11_elems *elems __free(kfree) = NULL; 10953 size_t ies_len; 10954 u16 status_code; 10955 u8 *pos, dialog_token; 10956 10957 if (!ieee80211_mgd_epcs_supp(sdata)) 10958 return; 10959 10960 /* Handle dialog token and status code */ 10961 pos = mgmt->u.action.u.epcs.variable; 10962 dialog_token = *pos; 10963 status_code = get_unaligned_le16(pos + 1); 10964 10965 /* An EPCS enable response with dialog token == 0 is an unsolicited 10966 * notification from the AP MLD. In such a case, EPCS should already be 10967 * enabled and status must be success 10968 */ 10969 if (!dialog_token && 10970 (!sdata->u.mgd.epcs.enabled || 10971 status_code != WLAN_STATUS_SUCCESS)) 10972 return; 10973 10974 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 10975 return; 10976 10977 sdata->u.mgd.epcs.dialog_token = 0; 10978 10979 if (status_code != WLAN_STATUS_SUCCESS) 10980 return; 10981 10982 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10983 ies_len = len - offsetof(struct ieee80211_mgmt, 10984 u.action.u.epcs.variable) - 10985 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10986 10987 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 10988 if (!elems) 10989 return; 10990 10991 ieee80211_ml_epcs(sdata, elems); 10992 ieee80211_epcs_changed(sdata, true); 10993 } 10994 10995 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 10996 struct ieee80211_mgmt *mgmt, size_t len) 10997 { 10998 if (!ieee80211_vif_is_mld(&sdata->vif) || 10999 !sdata->u.mgd.epcs.enabled) 11000 return; 11001 11002 ieee80211_epcs_teardown(sdata); 11003 ieee80211_epcs_changed(sdata, false); 11004 } 11005