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(sdata->local, elems->s1g_oper, 184 chandef)) { 185 /* Fallback to default 1MHz */ 186 chandef->width = NL80211_CHAN_WIDTH_1; 187 chandef->s1g_primary_2mhz = false; 188 } 189 190 return IEEE80211_CONN_MODE_S1G; 191 } 192 193 /* get special 6 GHz case out of the way */ 194 if (sband->band == NL80211_BAND_6GHZ) { 195 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 196 197 /* this is an error */ 198 if (conn->mode < IEEE80211_CONN_MODE_HE) 199 return IEEE80211_CONN_MODE_LEGACY; 200 201 if (!elems->he_6ghz_capa || !elems->he_cap) { 202 sdata_info(sdata, 203 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 204 return IEEE80211_CONN_MODE_LEGACY; 205 } 206 207 if (!eht_oper || !elems->eht_cap) { 208 eht_oper = NULL; 209 mode = IEEE80211_CONN_MODE_HE; 210 } 211 212 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 213 eht_oper, chandef)) { 214 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 215 return IEEE80211_CONN_MODE_LEGACY; 216 } 217 218 return mode; 219 } 220 221 /* now we have the progression HT, VHT, ... */ 222 if (conn->mode < IEEE80211_CONN_MODE_HT) 223 return IEEE80211_CONN_MODE_LEGACY; 224 225 if (!ht_oper || !elems->ht_cap_elem) 226 return IEEE80211_CONN_MODE_LEGACY; 227 228 chandef->width = NL80211_CHAN_WIDTH_20; 229 230 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 231 channel->band); 232 /* check that channel matches the right operating channel */ 233 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 234 /* 235 * It's possible that some APs are confused here; 236 * Netgear WNDR3700 sometimes reports 4 higher than 237 * the actual channel in association responses, but 238 * since we look at probe response/beacon data here 239 * it should be OK. 240 */ 241 sdata_info(sdata, 242 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 243 channel->center_freq, ht_cfreq, 244 ht_oper->primary_chan, channel->band); 245 return IEEE80211_CONN_MODE_LEGACY; 246 } 247 248 ieee80211_chandef_ht_oper(ht_oper, chandef); 249 250 if (conn->mode < IEEE80211_CONN_MODE_VHT) 251 return IEEE80211_CONN_MODE_HT; 252 253 vht_chandef = *chandef; 254 255 /* 256 * having he_cap/he_oper parsed out implies we're at 257 * least operating as HE STA 258 */ 259 if (elems->he_cap && he_oper && 260 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 261 struct ieee80211_vht_operation he_oper_vht_cap; 262 263 /* 264 * Set only first 3 bytes (other 2 aren't used in 265 * ieee80211_chandef_vht_oper() anyway) 266 */ 267 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 268 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 269 270 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 271 &he_oper_vht_cap, ht_oper, 272 &vht_chandef)) { 273 sdata_info(sdata, 274 "HE AP VHT information is invalid, disabling HE\n"); 275 /* this will cause us to re-parse as VHT STA */ 276 return IEEE80211_CONN_MODE_VHT; 277 } 278 } else if (!vht_oper || !elems->vht_cap_elem) { 279 if (sband->band == NL80211_BAND_5GHZ) { 280 sdata_info(sdata, 281 "VHT information is missing, disabling VHT\n"); 282 return IEEE80211_CONN_MODE_HT; 283 } 284 no_vht = true; 285 } else if (sband->band == NL80211_BAND_2GHZ) { 286 no_vht = true; 287 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 288 vht_cap_info, 289 vht_oper, ht_oper, 290 &vht_chandef)) { 291 sdata_info(sdata, 292 "AP VHT information is invalid, disabling VHT\n"); 293 return IEEE80211_CONN_MODE_HT; 294 } 295 296 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 297 sdata_info(sdata, 298 "AP VHT information doesn't match HT, disabling VHT\n"); 299 return IEEE80211_CONN_MODE_HT; 300 } 301 302 *chandef = vht_chandef; 303 304 /* stick to current max mode if we or the AP don't have HE */ 305 if (conn->mode < IEEE80211_CONN_MODE_HE || 306 !elems->he_operation || !elems->he_cap) { 307 if (no_vht) 308 return IEEE80211_CONN_MODE_HT; 309 return IEEE80211_CONN_MODE_VHT; 310 } 311 312 /* stick to HE if we or the AP don't have EHT */ 313 if (conn->mode < IEEE80211_CONN_MODE_EHT || 314 !eht_oper || !elems->eht_cap) 315 return IEEE80211_CONN_MODE_HE; 316 317 /* 318 * handle the case that the EHT operation indicates that it holds EHT 319 * operation information (in case that the channel width differs from 320 * the channel width reported in HT/VHT/HE). 321 */ 322 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 323 struct cfg80211_chan_def eht_chandef = *chandef; 324 325 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 326 &eht_chandef); 327 328 eht_chandef.punctured = 329 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 330 331 if (!cfg80211_chandef_valid(&eht_chandef)) { 332 sdata_info(sdata, 333 "AP EHT information is invalid, disabling EHT\n"); 334 return IEEE80211_CONN_MODE_HE; 335 } 336 337 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 338 sdata_info(sdata, 339 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 340 return IEEE80211_CONN_MODE_HE; 341 } 342 343 *chandef = eht_chandef; 344 } 345 346 return IEEE80211_CONN_MODE_EHT; 347 } 348 349 static bool 350 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 351 struct ieee80211_supported_band *sband, 352 const struct ieee80211_ht_operation *ht_op) 353 { 354 struct ieee80211_sta_ht_cap sta_ht_cap; 355 int i; 356 357 if (sband->band == NL80211_BAND_6GHZ) 358 return true; 359 360 if (!ht_op) 361 return false; 362 363 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 364 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 365 366 /* 367 * P802.11REVme/D7.0 - 6.5.4.2.4 368 * ... 369 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 370 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 371 * in the HT Operation parameter that contains any unsupported MCSs, 372 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 373 * contain a ResultCode parameter that is not set to the value SUCCESS. 374 * ... 375 */ 376 377 /* Simply check that all basic rates are in the STA RX mask */ 378 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 379 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 380 ht_op->basic_set[i]) 381 return false; 382 } 383 384 return true; 385 } 386 387 static bool 388 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 389 int link_id, 390 struct ieee80211_supported_band *sband, 391 const struct ieee80211_vht_operation *vht_op) 392 { 393 struct ieee80211_sta_vht_cap sta_vht_cap; 394 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 395 int nss; 396 397 if (sband->band != NL80211_BAND_5GHZ) 398 return true; 399 400 if (!vht_op) 401 return false; 402 403 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 404 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 405 406 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 407 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 408 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 409 410 /* 411 * Many APs are incorrectly advertising an all-zero value here, 412 * which really means MCS 0-7 are required for 1-8 streams, but 413 * they don't really mean it that way. 414 * Some other APs are incorrectly advertising 3 spatial streams 415 * with MCS 0-7 are required, but don't really mean it that way 416 * and we'll connect only with HT, rather than even HE. 417 * As a result, unfortunately the VHT basic MCS/NSS set cannot 418 * be used at all, so check it only in strict mode. 419 */ 420 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 421 return true; 422 423 /* 424 * P802.11REVme/D7.0 - 6.5.4.2.4 425 * ... 426 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 427 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 428 * field in the VHT Operation parameter that contains any unsupported 429 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 430 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 431 * that is not set to the value SUCCESS. 432 * ... 433 */ 434 for (nss = 8; nss > 0; nss--) { 435 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 436 u8 sta_rx_val; 437 u8 sta_tx_val; 438 439 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 440 continue; 441 442 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 443 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 444 445 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 446 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 447 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 448 link_id_info(sdata, link_id, 449 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 450 nss, sta_rx_val, sta_tx_val, ap_op_val); 451 return false; 452 } 453 } 454 455 return true; 456 } 457 458 static bool 459 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 460 int link_id, 461 const struct ieee80211_he_cap_elem *he_cap, 462 const struct ieee80211_he_operation *he_op) 463 { 464 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 465 u16 mcs_80_map_tx, mcs_80_map_rx; 466 u16 ap_min_req_set; 467 int nss; 468 469 if (!he_cap) 470 return false; 471 472 /* mcs_nss is right after he_cap info */ 473 he_mcs_nss_supp = (void *)(he_cap + 1); 474 475 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 476 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 477 478 /* P802.11-REVme/D0.3 479 * 27.1.1 Introduction to the HE PHY 480 * ... 481 * An HE STA shall support the following features: 482 * ... 483 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 484 * supported channel widths for HE SU PPDUs 485 */ 486 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 487 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 488 link_id_info(sdata, link_id, 489 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 490 mcs_80_map_tx, mcs_80_map_rx); 491 return false; 492 } 493 494 if (!he_op) 495 return true; 496 497 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 498 499 /* 500 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 501 * zeroes, which is nonsense, and completely inconsistent with itself 502 * (it doesn't have 8 streams). Accept the settings in this case anyway. 503 */ 504 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 505 return true; 506 507 /* make sure the AP is consistent with itself 508 * 509 * P802.11-REVme/D0.3 510 * 26.17.1 Basic HE BSS operation 511 * 512 * A STA that is operating in an HE BSS shall be able to receive and 513 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 514 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 515 * MLME-START.request primitive and shall be able to receive at each of 516 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 517 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 518 * primitive 519 */ 520 for (nss = 8; nss > 0; nss--) { 521 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 522 u8 ap_rx_val; 523 u8 ap_tx_val; 524 525 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 526 continue; 527 528 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 529 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 530 531 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 532 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 533 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 534 link_id_info(sdata, link_id, 535 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 536 nss, ap_rx_val, ap_tx_val, ap_op_val); 537 return false; 538 } 539 } 540 541 return true; 542 } 543 544 static bool 545 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 546 struct ieee80211_supported_band *sband, 547 const struct ieee80211_he_operation *he_op) 548 { 549 const struct ieee80211_sta_he_cap *sta_he_cap = 550 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 551 u16 ap_min_req_set; 552 int i; 553 554 if (!sta_he_cap || !he_op) 555 return false; 556 557 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 558 559 /* 560 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 561 * zeroes, which is nonsense, and completely inconsistent with itself 562 * (it doesn't have 8 streams). Accept the settings in this case anyway. 563 */ 564 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 565 return true; 566 567 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 568 for (i = 0; i < 3; i++) { 569 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 570 &sta_he_cap->he_mcs_nss_supp; 571 u16 sta_mcs_map_rx = 572 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 573 u16 sta_mcs_map_tx = 574 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 575 u8 nss; 576 bool verified = true; 577 578 /* 579 * For each band there is a maximum of 8 spatial streams 580 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 581 * of 2 bits per NSS (1-8), with the values defined in enum 582 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 583 * capabilities aren't less than the AP's minimum requirements 584 * for this HE BSS per SS. 585 * It is enough to find one such band that meets the reqs. 586 */ 587 for (nss = 8; nss > 0; nss--) { 588 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 589 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 590 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 591 592 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 593 continue; 594 595 /* 596 * Make sure the HE AP doesn't require MCSs that aren't 597 * supported by the client as required by spec 598 * 599 * P802.11-REVme/D0.3 600 * 26.17.1 Basic HE BSS operation 601 * 602 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 603 * a BSS, unless it supports (i.e., is able to both transmit and 604 * receive using) all of the <HE-MCS, NSS> tuples in the basic 605 * HE-MCS and NSS set. 606 */ 607 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 608 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 609 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 610 verified = false; 611 break; 612 } 613 } 614 615 if (verified) 616 return true; 617 } 618 619 /* If here, STA doesn't meet AP's HE min requirements */ 620 return false; 621 } 622 623 static u8 624 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 625 const struct ieee80211_sta_eht_cap *sta_eht_cap, 626 unsigned int idx, int bw) 627 { 628 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 629 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 630 631 /* handle us being a 20 MHz-only EHT STA - with four values 632 * for MCS 0-7, 8-9, 10-11, 12-13. 633 */ 634 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 635 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 636 637 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 638 if (idx > 0) 639 idx--; 640 641 switch (bw) { 642 case 0: 643 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 644 case 1: 645 if (!(he_phy_cap0 & 646 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 647 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 648 return 0xff; /* pass check */ 649 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 650 case 2: 651 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 652 return 0xff; /* pass check */ 653 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 654 } 655 656 WARN_ON(1); 657 return 0; 658 } 659 660 static bool 661 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 662 struct ieee80211_supported_band *sband, 663 const struct ieee80211_eht_operation *eht_op) 664 { 665 const struct ieee80211_sta_he_cap *sta_he_cap = 666 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 667 const struct ieee80211_sta_eht_cap *sta_eht_cap = 668 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 669 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 670 unsigned int i; 671 672 if (!sta_he_cap || !sta_eht_cap || !eht_op) 673 return false; 674 675 req = &eht_op->basic_mcs_nss; 676 677 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 678 u8 req_rx_nss, req_tx_nss; 679 unsigned int bw; 680 681 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 682 IEEE80211_EHT_MCS_NSS_RX); 683 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 684 IEEE80211_EHT_MCS_NSS_TX); 685 686 for (bw = 0; bw < 3; bw++) { 687 u8 have, have_rx_nss, have_tx_nss; 688 689 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 690 sta_eht_cap, 691 i, bw); 692 have_rx_nss = u8_get_bits(have, 693 IEEE80211_EHT_MCS_NSS_RX); 694 have_tx_nss = u8_get_bits(have, 695 IEEE80211_EHT_MCS_NSS_TX); 696 697 if (req_rx_nss > have_rx_nss || 698 req_tx_nss > have_tx_nss) 699 return false; 700 } 701 } 702 703 return true; 704 } 705 706 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 707 const u8 *supp_rates, 708 unsigned int supp_rates_len, 709 const u8 *ext_supp_rates, 710 unsigned int ext_supp_rates_len, 711 u32 *rates, u32 *basic_rates, 712 unsigned long *unknown_rates_selectors, 713 bool *have_higher_than_11mbit, 714 int *min_rate, int *min_rate_index) 715 { 716 int i, j; 717 718 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 719 u8 supp_rate = i < supp_rates_len ? 720 supp_rates[i] : 721 ext_supp_rates[i - supp_rates_len]; 722 int rate = supp_rate & 0x7f; 723 bool is_basic = !!(supp_rate & 0x80); 724 725 if ((rate * 5) > 110 && have_higher_than_11mbit) 726 *have_higher_than_11mbit = true; 727 728 /* 729 * Skip membership selectors since they're not rates. 730 * 731 * Note: Even though the membership selector and the basic 732 * rate flag share the same bit, they are not exactly 733 * the same. 734 */ 735 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 736 if (unknown_rates_selectors) 737 set_bit(rate, unknown_rates_selectors); 738 continue; 739 } 740 741 for (j = 0; j < sband->n_bitrates; j++) { 742 struct ieee80211_rate *br; 743 int brate; 744 745 br = &sband->bitrates[j]; 746 747 brate = DIV_ROUND_UP(br->bitrate, 5); 748 if (brate == rate) { 749 if (rates) 750 *rates |= BIT(j); 751 if (is_basic && basic_rates) 752 *basic_rates |= BIT(j); 753 if (min_rate && (rate * 5) < *min_rate) { 754 *min_rate = rate * 5; 755 if (min_rate_index) 756 *min_rate_index = j; 757 } 758 break; 759 } 760 } 761 762 /* Handle an unknown entry as if it is an unknown selector */ 763 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 764 set_bit(rate, unknown_rates_selectors); 765 } 766 } 767 768 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 769 const struct cfg80211_chan_def *chandef, 770 u32 prohibited_flags) 771 { 772 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 773 chandef, prohibited_flags)) 774 return false; 775 776 if (chandef->punctured && 777 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 778 return false; 779 780 return true; 781 } 782 783 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 784 { 785 if (c->width == NL80211_CHAN_WIDTH_80P80) 786 return 4 + 4; 787 788 return cfg80211_chandef_get_width(c) / 20; 789 } 790 791 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 792 { 793 switch (c->width) { 794 case NL80211_CHAN_WIDTH_20: 795 case NL80211_CHAN_WIDTH_20_NOHT: 796 return 1; 797 case NL80211_CHAN_WIDTH_40: 798 return 2; 799 case NL80211_CHAN_WIDTH_80P80: 800 case NL80211_CHAN_WIDTH_80: 801 return 3; 802 case NL80211_CHAN_WIDTH_160: 803 return 4; 804 case NL80211_CHAN_WIDTH_320: 805 return 5; 806 default: 807 WARN_ON(1); 808 return 0; 809 } 810 } 811 812 VISIBLE_IF_MAC80211_KUNIT int 813 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 814 u8 n_partial_subchans) 815 { 816 int n = ieee80211_chandef_num_subchans(ap); 817 struct cfg80211_chan_def tmp = *ap; 818 int offset = 0; 819 820 /* 821 * Given a chandef (in this context, it's the AP's) and a number 822 * of subchannels that we want to look at ('n_partial_subchans'), 823 * calculate the offset in number of subchannels between the full 824 * and the subset with the desired width. 825 */ 826 827 /* same number of subchannels means no offset, obviously */ 828 if (n == n_partial_subchans) 829 return 0; 830 831 /* don't WARN - misconfigured APs could cause this if their N > width */ 832 if (n < n_partial_subchans) 833 return 0; 834 835 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 836 u32 prev = tmp.center_freq1; 837 838 ieee80211_chandef_downgrade(&tmp, NULL); 839 840 /* 841 * if center_freq moved up, half the original channels 842 * are gone now but were below, so increase offset 843 */ 844 if (prev < tmp.center_freq1) 845 offset += ieee80211_chandef_num_subchans(&tmp); 846 } 847 848 /* 849 * 80+80 with secondary 80 below primary - four subchannels for it 850 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 851 */ 852 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 853 ap->center_freq2 < ap->center_freq1) 854 offset += 4; 855 856 return offset; 857 } 858 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 859 860 VISIBLE_IF_MAC80211_KUNIT void 861 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 862 const struct cfg80211_chan_def *ap, 863 const struct cfg80211_chan_def *used) 864 { 865 u8 needed = ieee80211_chandef_num_subchans(used); 866 u8 have = ieee80211_chandef_num_subchans(ap); 867 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 868 u8 offset; 869 870 if (!psd->valid) 871 return; 872 873 /* if N is zero, all defaults were used, no point in rearranging */ 874 if (!psd->n) 875 goto out; 876 877 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 878 879 /* 880 * This assumes that 'N' is consistent with the HE channel, as 881 * it should be (otherwise the AP is broken). 882 * 883 * In psd->power we have values in the order 0..N, 0..K, where 884 * N+K should cover the entire channel per 'ap', but even if it 885 * doesn't then we've pre-filled 'unlimited' as defaults. 886 * 887 * But this is all the wrong order, we want to have them in the 888 * order of the 'used' channel. 889 * 890 * So for example, we could have a 320 MHz EHT AP, which has the 891 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 892 * seem to be considered for the TPE), as follows: 893 * 894 * EHT 320: | | | | | | | | | | | | | | | | | 895 * HE 80: | | | | | 896 * used 160: | | | | | | | | | 897 * 898 * N entries: |--|--|--|--| 899 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 900 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 901 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 902 * used chan: 0 1 2 3 4 5 6 7 903 * 904 * The idx in the power array ('power idx') is like this since it 905 * comes directly from the element's N and K entries in their 906 * element order, and those are this way for HE compatibility. 907 * 908 * Rearrange them as desired here, first by putting them into the 909 * 'full chan' order, and then selecting the necessary subset for 910 * the 'used chan'. 911 */ 912 913 /* first reorder according to AP channel */ 914 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 915 for (int i = 0; i < have; i++) { 916 if (i < offset) 917 tmp[i] = psd->power[i + psd->n]; 918 else if (i < offset + psd->n) 919 tmp[i] = psd->power[i - offset]; 920 else 921 tmp[i] = psd->power[i]; 922 } 923 924 /* 925 * and then select the subset for the used channel 926 * (set everything to defaults first in case a driver is confused) 927 */ 928 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 929 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 930 for (int i = 0; i < needed; i++) 931 psd->power[i] = tmp[offset + i]; 932 933 out: 934 /* limit, but don't lie if there are defaults in the data */ 935 if (needed < psd->count) 936 psd->count = needed; 937 } 938 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 939 940 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 941 const struct cfg80211_chan_def *ap, 942 const struct cfg80211_chan_def *used) 943 { 944 /* ignore this completely for narrow/invalid channels */ 945 if (!ieee80211_chandef_num_subchans(ap) || 946 !ieee80211_chandef_num_subchans(used)) { 947 ieee80211_clear_tpe(tpe); 948 return; 949 } 950 951 for (int i = 0; i < 2; i++) { 952 int needed_pwr_count; 953 954 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 955 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 956 957 /* limit this to the widths we actually need */ 958 needed_pwr_count = ieee80211_chandef_num_widths(used); 959 if (needed_pwr_count < tpe->max_local[i].count) 960 tpe->max_local[i].count = needed_pwr_count; 961 if (needed_pwr_count < tpe->max_reg_client[i].count) 962 tpe->max_reg_client[i].count = needed_pwr_count; 963 } 964 } 965 966 /* 967 * The AP part of the channel request is used to distinguish settings 968 * to the device used for wider bandwidth OFDMA. This is used in the 969 * channel context code to assign two channel contexts even if they're 970 * both for the same channel, if the AP bandwidths are incompatible. 971 * If not EHT (or driver override) then ap.chan == NULL indicates that 972 * there's no wider BW OFDMA used. 973 */ 974 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 975 struct ieee80211_chan_req *chanreq, 976 struct ieee80211_conn_settings *conn, 977 struct cfg80211_chan_def *ap_chandef) 978 { 979 chanreq->ap.chan = NULL; 980 981 if (conn->mode < IEEE80211_CONN_MODE_EHT) 982 return; 983 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 984 return; 985 986 chanreq->ap = *ap_chandef; 987 } 988 989 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 990 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 991 struct ieee80211_conn_settings *conn, 992 struct cfg80211_bss *cbss, int link_id, 993 struct ieee80211_chan_req *chanreq, 994 struct cfg80211_chan_def *ap_chandef, 995 unsigned long *userspace_selectors) 996 { 997 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 998 struct ieee80211_bss *bss = (void *)cbss->priv; 999 struct ieee80211_channel *channel = cbss->channel; 1000 struct ieee80211_elems_parse_params parse_params = { 1001 .link_id = -1, 1002 .from_ap = true, 1003 .start = ies->data, 1004 .len = ies->len, 1005 }; 1006 struct ieee802_11_elems *elems; 1007 struct ieee80211_supported_band *sband; 1008 enum ieee80211_conn_mode ap_mode; 1009 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1010 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1011 int ret; 1012 1013 again: 1014 parse_params.mode = conn->mode; 1015 elems = ieee802_11_parse_elems_full(&parse_params); 1016 if (!elems) 1017 return ERR_PTR(-ENOMEM); 1018 1019 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1020 elems, false, conn, ap_chandef); 1021 1022 /* this should be impossible since parsing depends on our mode */ 1023 if (WARN_ON(ap_mode > conn->mode)) { 1024 ret = -EINVAL; 1025 goto free; 1026 } 1027 1028 if (conn->mode != ap_mode) { 1029 conn->mode = ap_mode; 1030 kfree(elems); 1031 goto again; 1032 } 1033 1034 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1035 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1036 1037 sband = sdata->local->hw.wiphy->bands[channel->band]; 1038 1039 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1040 elems->ext_supp_rates, elems->ext_supp_rates_len, 1041 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1042 NULL); 1043 1044 switch (channel->band) { 1045 case NL80211_BAND_S1GHZ: 1046 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1047 ret = -EINVAL; 1048 goto free; 1049 } 1050 1051 chanreq->oper = *ap_chandef; 1052 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1053 IEEE80211_CHAN_DISABLED)) { 1054 ret = -EINVAL; 1055 goto free; 1056 } 1057 1058 return elems; 1059 case NL80211_BAND_6GHZ: 1060 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1061 link_id_info(sdata, link_id, 1062 "Rejecting non-HE 6/7 GHz connection"); 1063 ret = -EINVAL; 1064 goto free; 1065 } 1066 break; 1067 default: 1068 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1069 ret = -EINVAL; 1070 goto free; 1071 } 1072 } 1073 1074 switch (ap_mode) { 1075 case IEEE80211_CONN_MODE_S1G: 1076 WARN_ON(1); 1077 ret = -EINVAL; 1078 goto free; 1079 case IEEE80211_CONN_MODE_LEGACY: 1080 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1081 break; 1082 case IEEE80211_CONN_MODE_HT: 1083 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1084 conn->bw_limit, 1085 IEEE80211_CONN_BW_LIMIT_40); 1086 break; 1087 case IEEE80211_CONN_MODE_VHT: 1088 case IEEE80211_CONN_MODE_HE: 1089 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1090 conn->bw_limit, 1091 IEEE80211_CONN_BW_LIMIT_160); 1092 break; 1093 case IEEE80211_CONN_MODE_EHT: 1094 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1095 conn->bw_limit, 1096 IEEE80211_CONN_BW_LIMIT_320); 1097 break; 1098 } 1099 1100 chanreq->oper = *ap_chandef; 1101 1102 bitmap_copy(sta_selectors, userspace_selectors, 128); 1103 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1104 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1105 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1106 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1107 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1108 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1109 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1110 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1111 1112 /* 1113 * We do not support EPD or GLK so never add them. 1114 * SAE_H2E is handled through userspace_selectors. 1115 */ 1116 1117 /* Check if we support all required features */ 1118 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1119 link_id_info(sdata, link_id, 1120 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1121 ret = -EINVAL; 1122 goto free; 1123 } 1124 1125 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1126 1127 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1128 IEEE80211_CHAN_DISABLED)) { 1129 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1130 ret = -EINVAL; 1131 goto free; 1132 } 1133 1134 ieee80211_chanreq_downgrade(chanreq, conn); 1135 } 1136 1137 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1138 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1139 IEEE80211_CHAN_NO_HE)) { 1140 conn->mode = IEEE80211_CONN_MODE_VHT; 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 (conn->mode >= IEEE80211_CONN_MODE_EHT && 1147 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1148 IEEE80211_CHAN_NO_EHT)) { 1149 conn->mode = IEEE80211_CONN_MODE_HE; 1150 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1151 conn->bw_limit, 1152 IEEE80211_CONN_BW_LIMIT_160); 1153 } 1154 1155 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1156 link_id_info(sdata, link_id, 1157 "regulatory prevented using AP config, downgraded\n"); 1158 1159 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1160 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1161 elems->ht_operation)) { 1162 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1163 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1164 link_id_info(sdata, link_id, 1165 "required MCSes not supported, disabling HT\n"); 1166 } 1167 1168 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1169 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1170 elems->vht_operation)) { 1171 conn->mode = IEEE80211_CONN_MODE_HT; 1172 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1173 conn->bw_limit, 1174 IEEE80211_CONN_BW_LIMIT_40); 1175 link_id_info(sdata, link_id, 1176 "required MCSes not supported, disabling VHT\n"); 1177 } 1178 1179 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1180 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1181 (void *)elems->he_cap, 1182 elems->he_operation) || 1183 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1184 elems->he_operation))) { 1185 conn->mode = IEEE80211_CONN_MODE_VHT; 1186 link_id_info(sdata, link_id, 1187 "required MCSes not supported, disabling HE\n"); 1188 } 1189 1190 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1191 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1192 elems->eht_operation)) { 1193 conn->mode = IEEE80211_CONN_MODE_HE; 1194 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1195 conn->bw_limit, 1196 IEEE80211_CONN_BW_LIMIT_160); 1197 link_id_info(sdata, link_id, 1198 "required MCSes not supported, disabling EHT\n"); 1199 } 1200 1201 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1202 channel->band != NL80211_BAND_2GHZ && 1203 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1204 conn->mode = IEEE80211_CONN_MODE_HE; 1205 link_id_info(sdata, link_id, 1206 "required bandwidth not supported, disabling EHT\n"); 1207 } 1208 1209 /* the mode can only decrease, so this must terminate */ 1210 if (ap_mode != conn->mode) { 1211 kfree(elems); 1212 goto again; 1213 } 1214 1215 mlme_link_id_dbg(sdata, link_id, 1216 "connecting with %s mode, max bandwidth %d MHz\n", 1217 ieee80211_conn_mode_str(conn->mode), 1218 20 * (1 << conn->bw_limit)); 1219 1220 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1221 ret = -EINVAL; 1222 goto free; 1223 } 1224 1225 return elems; 1226 free: 1227 kfree(elems); 1228 return ERR_PTR(ret); 1229 } 1230 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1231 1232 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1233 struct ieee802_11_elems *elems, 1234 bool update, u64 *changed, u16 stype) 1235 { 1236 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1237 struct ieee80211_sub_if_data *sdata = link->sdata; 1238 struct ieee80211_chan_req chanreq = {}; 1239 struct cfg80211_chan_def ap_chandef; 1240 enum ieee80211_conn_mode ap_mode; 1241 const char *frame; 1242 u32 vht_cap_info = 0; 1243 u16 ht_opmode; 1244 int ret; 1245 1246 switch (stype) { 1247 case IEEE80211_STYPE_BEACON: 1248 frame = "beacon"; 1249 break; 1250 case IEEE80211_STYPE_ASSOC_RESP: 1251 frame = "assoc response"; 1252 break; 1253 case IEEE80211_STYPE_REASSOC_RESP: 1254 frame = "reassoc response"; 1255 break; 1256 case IEEE80211_STYPE_ACTION: 1257 /* the only action frame that gets here */ 1258 frame = "ML reconf response"; 1259 break; 1260 default: 1261 return -EINVAL; 1262 } 1263 1264 /* don't track any bandwidth changes in legacy/S1G modes */ 1265 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1266 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1267 return 0; 1268 1269 if (elems->vht_cap_elem) 1270 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1271 1272 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1273 elems, true, &link->u.mgd.conn, 1274 &ap_chandef); 1275 1276 if (ap_mode != link->u.mgd.conn.mode) { 1277 link_info(link, 1278 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1279 link->u.mgd.bssid, 1280 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1281 ieee80211_conn_mode_str(ap_mode), frame); 1282 return -EINVAL; 1283 } 1284 1285 chanreq.oper = ap_chandef; 1286 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1287 &ap_chandef); 1288 1289 /* 1290 * if HT operation mode changed store the new one - 1291 * this may be applicable even if channel is identical 1292 */ 1293 if (elems->ht_operation) { 1294 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1295 if (link->conf->ht_operation_mode != ht_opmode) { 1296 *changed |= BSS_CHANGED_HT; 1297 link->conf->ht_operation_mode = ht_opmode; 1298 } 1299 } 1300 1301 /* 1302 * Downgrade the new channel if we associated with restricted 1303 * bandwidth capabilities. For example, if we associated as a 1304 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1305 * or config reasons) then switching to a 40 MHz channel now 1306 * won't do us any good -- we couldn't use it with the AP. 1307 */ 1308 while (link->u.mgd.conn.bw_limit < 1309 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1310 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1311 1312 /* TPE element is not present in (re)assoc/ML reconfig response */ 1313 if (stype == IEEE80211_STYPE_BEACON && 1314 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1315 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1316 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1317 &chanreq.oper); 1318 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1319 link->conf->tpe = elems->tpe; 1320 *changed |= BSS_CHANGED_TPE; 1321 } 1322 } 1323 1324 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1325 return 0; 1326 1327 link_info(link, 1328 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1329 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1330 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1331 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1332 chanreq.oper.center_freq2); 1333 1334 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1335 sdata_info(sdata, 1336 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1337 link->u.mgd.bssid, frame); 1338 return -EINVAL; 1339 } 1340 1341 if (!update) { 1342 link->conf->chanreq = chanreq; 1343 return 0; 1344 } 1345 1346 /* 1347 * We're tracking the current AP here, so don't do any further checks 1348 * here. This keeps us from playing ping-pong with regulatory, without 1349 * it the following can happen (for example): 1350 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1351 * - AP advertises regdom US 1352 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1353 * - we detect an unsupported channel and disconnect 1354 * - disconnect causes CRDA to reload world regdomain and the game 1355 * starts anew. 1356 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1357 * 1358 * It seems possible that there are still scenarios with CSA or real 1359 * bandwidth changes where a this could happen, but those cases are 1360 * less common and wouldn't completely prevent using the AP. 1361 */ 1362 1363 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1364 if (ret) { 1365 sdata_info(sdata, 1366 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1367 link->u.mgd.bssid, frame); 1368 return ret; 1369 } 1370 1371 cfg80211_schedule_channels_check(&sdata->wdev); 1372 return 0; 1373 } 1374 1375 /* frame sending functions */ 1376 1377 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1378 struct sk_buff *skb, u8 ap_ht_param, 1379 struct ieee80211_supported_band *sband, 1380 struct ieee80211_channel *channel, 1381 enum ieee80211_smps_mode smps, 1382 const struct ieee80211_conn_settings *conn) 1383 { 1384 u8 *pos; 1385 u32 flags = channel->flags; 1386 u16 cap; 1387 struct ieee80211_sta_ht_cap ht_cap; 1388 1389 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1390 1391 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1392 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1393 1394 /* determine capability flags */ 1395 cap = ht_cap.cap; 1396 1397 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1398 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1399 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1400 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1401 cap &= ~IEEE80211_HT_CAP_SGI_40; 1402 } 1403 break; 1404 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1405 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1406 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1407 cap &= ~IEEE80211_HT_CAP_SGI_40; 1408 } 1409 break; 1410 } 1411 1412 /* 1413 * If 40 MHz was disabled associate as though we weren't 1414 * capable of 40 MHz -- some broken APs will never fall 1415 * back to trying to transmit in 20 MHz. 1416 */ 1417 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1418 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1419 cap &= ~IEEE80211_HT_CAP_SGI_40; 1420 } 1421 1422 /* set SM PS mode properly */ 1423 cap &= ~IEEE80211_HT_CAP_SM_PS; 1424 switch (smps) { 1425 case IEEE80211_SMPS_AUTOMATIC: 1426 case IEEE80211_SMPS_NUM_MODES: 1427 WARN_ON(1); 1428 fallthrough; 1429 case IEEE80211_SMPS_OFF: 1430 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1431 IEEE80211_HT_CAP_SM_PS_SHIFT; 1432 break; 1433 case IEEE80211_SMPS_STATIC: 1434 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1435 IEEE80211_HT_CAP_SM_PS_SHIFT; 1436 break; 1437 case IEEE80211_SMPS_DYNAMIC: 1438 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1439 IEEE80211_HT_CAP_SM_PS_SHIFT; 1440 break; 1441 } 1442 1443 /* reserve and fill IE */ 1444 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1445 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1446 } 1447 1448 /* This function determines vht capability flags for the association 1449 * and builds the IE. 1450 * Note - the function returns true to own the MU-MIMO capability 1451 */ 1452 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1453 struct sk_buff *skb, 1454 struct ieee80211_supported_band *sband, 1455 struct ieee80211_vht_cap *ap_vht_cap, 1456 const struct ieee80211_conn_settings *conn) 1457 { 1458 struct ieee80211_local *local = sdata->local; 1459 u8 *pos; 1460 u32 cap; 1461 struct ieee80211_sta_vht_cap vht_cap; 1462 u32 mask, ap_bf_sts, our_bf_sts; 1463 bool mu_mimo_owner = false; 1464 1465 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1466 1467 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1468 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1469 1470 /* determine capability flags */ 1471 cap = vht_cap.cap; 1472 1473 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1474 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1475 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1476 } 1477 1478 /* 1479 * Some APs apparently get confused if our capabilities are better 1480 * than theirs, so restrict what we advertise in the assoc request. 1481 */ 1482 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1483 if (!(ap_vht_cap->vht_cap_info & 1484 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1485 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1486 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1487 else if (!(ap_vht_cap->vht_cap_info & 1488 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1489 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1490 } 1491 1492 /* 1493 * If some other vif is using the MU-MIMO capability we cannot associate 1494 * using MU-MIMO - this will lead to contradictions in the group-id 1495 * mechanism. 1496 * Ownership is defined since association request, in order to avoid 1497 * simultaneous associations with MU-MIMO. 1498 */ 1499 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1500 bool disable_mu_mimo = false; 1501 struct ieee80211_sub_if_data *other; 1502 1503 list_for_each_entry(other, &local->interfaces, list) { 1504 if (other->vif.bss_conf.mu_mimo_owner) { 1505 disable_mu_mimo = true; 1506 break; 1507 } 1508 } 1509 if (disable_mu_mimo) 1510 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1511 else 1512 mu_mimo_owner = true; 1513 } 1514 1515 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1516 1517 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1518 our_bf_sts = cap & mask; 1519 1520 if (ap_bf_sts < our_bf_sts) { 1521 cap &= ~mask; 1522 cap |= ap_bf_sts; 1523 } 1524 1525 /* reserve and fill IE */ 1526 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1527 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1528 1529 return mu_mimo_owner; 1530 } 1531 1532 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1533 struct sk_buff *skb, 1534 enum nl80211_chan_width width, 1535 struct ieee80211_supported_band *sband, 1536 struct ieee80211_mgd_assoc_data *assoc_data) 1537 { 1538 u32 rates; 1539 1540 if (assoc_data->supp_rates_len && 1541 !ieee80211_hw_check(&local->hw, STRICT)) { 1542 /* 1543 * Get all rates supported by the device and the AP as 1544 * some APs don't like getting a superset of their rates 1545 * in the association request (e.g. D-Link DAP 1353 in 1546 * b-only mode)... 1547 */ 1548 ieee80211_parse_bitrates(width, sband, 1549 assoc_data->supp_rates, 1550 assoc_data->supp_rates_len, 1551 &rates); 1552 } else { 1553 /* 1554 * In case AP not provide any supported rates information 1555 * before association, we send information element(s) with 1556 * all rates that we support. 1557 */ 1558 rates = ~0; 1559 } 1560 1561 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1562 WLAN_EID_SUPP_RATES); 1563 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1564 WLAN_EID_EXT_SUPP_RATES); 1565 } 1566 1567 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1568 const u8 *elems, 1569 size_t elems_len, 1570 size_t offset) 1571 { 1572 size_t noffset; 1573 1574 static const u8 before_ht[] = { 1575 WLAN_EID_SSID, 1576 WLAN_EID_SUPP_RATES, 1577 WLAN_EID_EXT_SUPP_RATES, 1578 WLAN_EID_PWR_CAPABILITY, 1579 WLAN_EID_SUPPORTED_CHANNELS, 1580 WLAN_EID_RSN, 1581 WLAN_EID_QOS_CAPA, 1582 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1583 WLAN_EID_MOBILITY_DOMAIN, 1584 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1585 WLAN_EID_RIC_DATA, /* reassoc only */ 1586 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1587 }; 1588 static const u8 after_ric[] = { 1589 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1590 WLAN_EID_HT_CAPABILITY, 1591 WLAN_EID_BSS_COEX_2040, 1592 /* luckily this is almost always there */ 1593 WLAN_EID_EXT_CAPABILITY, 1594 WLAN_EID_QOS_TRAFFIC_CAPA, 1595 WLAN_EID_TIM_BCAST_REQ, 1596 WLAN_EID_INTERWORKING, 1597 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1598 WLAN_EID_VHT_CAPABILITY, 1599 WLAN_EID_OPMODE_NOTIF, 1600 }; 1601 1602 if (!elems_len) 1603 return offset; 1604 1605 noffset = ieee80211_ie_split_ric(elems, elems_len, 1606 before_ht, 1607 ARRAY_SIZE(before_ht), 1608 after_ric, 1609 ARRAY_SIZE(after_ric), 1610 offset); 1611 skb_put_data(skb, elems + offset, noffset - offset); 1612 1613 return noffset; 1614 } 1615 1616 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1617 const u8 *elems, 1618 size_t elems_len, 1619 size_t offset) 1620 { 1621 static const u8 before_vht[] = { 1622 /* 1623 * no need to list the ones split off before HT 1624 * or generated here 1625 */ 1626 WLAN_EID_BSS_COEX_2040, 1627 WLAN_EID_EXT_CAPABILITY, 1628 WLAN_EID_QOS_TRAFFIC_CAPA, 1629 WLAN_EID_TIM_BCAST_REQ, 1630 WLAN_EID_INTERWORKING, 1631 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1632 }; 1633 size_t noffset; 1634 1635 if (!elems_len) 1636 return offset; 1637 1638 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1639 noffset = ieee80211_ie_split(elems, elems_len, 1640 before_vht, ARRAY_SIZE(before_vht), 1641 offset); 1642 skb_put_data(skb, elems + offset, noffset - offset); 1643 1644 return noffset; 1645 } 1646 1647 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1648 const u8 *elems, 1649 size_t elems_len, 1650 size_t offset) 1651 { 1652 static const u8 before_he[] = { 1653 /* 1654 * no need to list the ones split off before VHT 1655 * or generated here 1656 */ 1657 WLAN_EID_OPMODE_NOTIF, 1658 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1659 /* 11ai elements */ 1660 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1661 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1662 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1663 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1664 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1665 /* TODO: add 11ah/11aj/11ak elements */ 1666 }; 1667 size_t noffset; 1668 1669 if (!elems_len) 1670 return offset; 1671 1672 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1673 noffset = ieee80211_ie_split(elems, elems_len, 1674 before_he, ARRAY_SIZE(before_he), 1675 offset); 1676 skb_put_data(skb, elems + offset, noffset - offset); 1677 1678 return noffset; 1679 } 1680 1681 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1682 const u8 *elems, size_t elems_len, 1683 size_t offset) 1684 { 1685 static const u8 before_reg_conn[] = { 1686 /* 1687 * no need to list the ones split off before HE 1688 * or generated here 1689 */ 1690 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1691 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1692 }; 1693 size_t noffset; 1694 1695 if (!elems_len) 1696 return offset; 1697 1698 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1699 ARRAY_SIZE(before_reg_conn), offset); 1700 skb_put_data(skb, elems + offset, noffset - offset); 1701 1702 return noffset; 1703 } 1704 1705 #define PRESENT_ELEMS_MAX 8 1706 #define PRESENT_ELEM_EXT_OFFS 0x100 1707 1708 static void 1709 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1710 struct sk_buff *skb, u16 capab, 1711 const struct element *ext_capa, 1712 const u16 *present_elems, 1713 struct ieee80211_mgd_assoc_data *assoc_data); 1714 1715 static size_t 1716 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1717 struct sk_buff *skb, u16 *capab, 1718 const struct element *ext_capa, 1719 const u8 *extra_elems, 1720 size_t extra_elems_len, 1721 unsigned int link_id, 1722 struct ieee80211_link_data *link, 1723 u16 *present_elems, 1724 struct ieee80211_mgd_assoc_data *assoc_data) 1725 { 1726 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1727 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1728 struct ieee80211_channel *chan = cbss->channel; 1729 const struct ieee80211_sband_iftype_data *iftd; 1730 struct ieee80211_local *local = sdata->local; 1731 struct ieee80211_supported_band *sband; 1732 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1733 struct ieee80211_chanctx_conf *chanctx_conf; 1734 enum ieee80211_smps_mode smps_mode; 1735 u16 orig_capab = *capab; 1736 size_t offset = 0; 1737 int present_elems_len = 0; 1738 u8 *pos; 1739 int i; 1740 1741 #define ADD_PRESENT_ELEM(id) do { \ 1742 /* need a last for termination - we use 0 == SSID */ \ 1743 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1744 present_elems[present_elems_len++] = (id); \ 1745 } while (0) 1746 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1747 1748 if (link) 1749 smps_mode = link->smps_mode; 1750 else if (sdata->u.mgd.powersave) 1751 smps_mode = IEEE80211_SMPS_DYNAMIC; 1752 else 1753 smps_mode = IEEE80211_SMPS_OFF; 1754 1755 if (link) { 1756 /* 1757 * 5/10 MHz scenarios are only viable without MLO, in which 1758 * case this pointer should be used ... All of this is a bit 1759 * unclear though, not sure this even works at all. 1760 */ 1761 rcu_read_lock(); 1762 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1763 if (chanctx_conf) 1764 width = chanctx_conf->def.width; 1765 rcu_read_unlock(); 1766 } 1767 1768 sband = local->hw.wiphy->bands[chan->band]; 1769 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1770 1771 if (sband->band == NL80211_BAND_2GHZ) { 1772 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1773 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1774 } 1775 1776 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1777 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1778 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1779 1780 if (sband->band != NL80211_BAND_S1GHZ) 1781 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1782 1783 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1784 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1785 struct cfg80211_chan_def chandef = { 1786 .width = width, 1787 .chan = chan, 1788 }; 1789 1790 pos = skb_put(skb, 4); 1791 *pos++ = WLAN_EID_PWR_CAPABILITY; 1792 *pos++ = 2; 1793 *pos++ = 0; /* min tx power */ 1794 /* max tx power */ 1795 *pos++ = ieee80211_chandef_max_power(&chandef); 1796 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1797 } 1798 1799 /* 1800 * Per spec, we shouldn't include the list of channels if we advertise 1801 * support for extended channel switching, but we've always done that; 1802 * (for now?) apply this restriction only on the (new) 6 GHz band. 1803 */ 1804 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1805 (sband->band != NL80211_BAND_6GHZ || 1806 !ext_capa || ext_capa->datalen < 1 || 1807 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1808 /* TODO: get this in reg domain format */ 1809 pos = skb_put(skb, 2 * sband->n_channels + 2); 1810 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1811 *pos++ = 2 * sband->n_channels; 1812 for (i = 0; i < sband->n_channels; i++) { 1813 int cf = sband->channels[i].center_freq; 1814 1815 *pos++ = ieee80211_frequency_to_channel(cf); 1816 *pos++ = 1; /* one channel in the subband*/ 1817 } 1818 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1819 } 1820 1821 /* if present, add any custom IEs that go before HT */ 1822 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1823 extra_elems_len, 1824 offset); 1825 1826 if (sband->band != NL80211_BAND_6GHZ && 1827 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1828 ieee80211_add_ht_ie(sdata, skb, 1829 assoc_data->link[link_id].ap_ht_param, 1830 sband, chan, smps_mode, 1831 &assoc_data->link[link_id].conn); 1832 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1833 } 1834 1835 /* if present, add any custom IEs that go before VHT */ 1836 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1837 extra_elems_len, 1838 offset); 1839 1840 if (sband->band != NL80211_BAND_6GHZ && 1841 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1842 sband->vht_cap.vht_supported) { 1843 bool mu_mimo_owner = 1844 ieee80211_add_vht_ie(sdata, skb, sband, 1845 &assoc_data->link[link_id].ap_vht_cap, 1846 &assoc_data->link[link_id].conn); 1847 1848 if (link) 1849 link->conf->mu_mimo_owner = mu_mimo_owner; 1850 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1851 } 1852 1853 /* if present, add any custom IEs that go before HE */ 1854 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1855 extra_elems_len, 1856 offset); 1857 1858 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1859 ieee80211_put_he_cap(skb, sdata, sband, 1860 &assoc_data->link[link_id].conn); 1861 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1862 if (sband->band == NL80211_BAND_6GHZ) 1863 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1864 } 1865 1866 /* 1867 * if present, add any custom IEs that go before regulatory 1868 * connectivity element 1869 */ 1870 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1871 extra_elems_len, offset); 1872 1873 if (sband->band == NL80211_BAND_6GHZ) { 1874 /* 1875 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1876 * capable of operating on the 6 GHz band shall transmit 1877 * regulatory connectivity element. 1878 */ 1879 ieee80211_put_reg_conn(skb, chan->flags); 1880 } 1881 1882 /* 1883 * careful - need to know about all the present elems before 1884 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1885 * we're going to put it after the ML element 1886 */ 1887 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1888 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1889 1890 if (link_id == assoc_data->assoc_link_id) 1891 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1892 present_elems, assoc_data); 1893 1894 /* crash if somebody gets it wrong */ 1895 present_elems = NULL; 1896 1897 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1898 ieee80211_put_eht_cap(skb, sdata, sband, 1899 &assoc_data->link[link_id].conn); 1900 1901 if (sband->band == NL80211_BAND_S1GHZ) { 1902 ieee80211_add_aid_request_ie(sdata, skb); 1903 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1904 } 1905 1906 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1907 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1908 1909 return offset; 1910 } 1911 1912 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1913 const u16 *outer, 1914 const u16 *inner) 1915 { 1916 unsigned int skb_len = skb->len; 1917 bool at_extension = false; 1918 bool added = false; 1919 int i, j; 1920 u8 *len, *list_len = NULL; 1921 1922 skb_put_u8(skb, WLAN_EID_EXTENSION); 1923 len = skb_put(skb, 1); 1924 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1925 1926 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1927 u16 elem = outer[i]; 1928 bool have_inner = false; 1929 1930 /* should at least be sorted in the sense of normal -> ext */ 1931 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1932 1933 /* switch to extension list */ 1934 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1935 at_extension = true; 1936 if (!list_len) 1937 skb_put_u8(skb, 0); 1938 list_len = NULL; 1939 } 1940 1941 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1942 if (elem == inner[j]) { 1943 have_inner = true; 1944 break; 1945 } 1946 } 1947 1948 if (have_inner) 1949 continue; 1950 1951 if (!list_len) { 1952 list_len = skb_put(skb, 1); 1953 *list_len = 0; 1954 } 1955 *list_len += 1; 1956 skb_put_u8(skb, (u8)elem); 1957 added = true; 1958 } 1959 1960 /* if we added a list but no extension list, make a zero-len one */ 1961 if (added && (!at_extension || !list_len)) 1962 skb_put_u8(skb, 0); 1963 1964 /* if nothing added remove extension element completely */ 1965 if (!added) 1966 skb_trim(skb, skb_len); 1967 else 1968 *len = skb->len - skb_len - 2; 1969 } 1970 1971 static void 1972 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1973 struct sk_buff *skb, u16 capab, 1974 const struct element *ext_capa, 1975 const u16 *outer_present_elems, 1976 struct ieee80211_mgd_assoc_data *assoc_data) 1977 { 1978 struct ieee80211_local *local = sdata->local; 1979 struct ieee80211_multi_link_elem *ml_elem; 1980 struct ieee80211_mle_basic_common_info *common; 1981 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1982 __le16 eml_capa = 0, mld_capa_ops = 0; 1983 unsigned int link_id; 1984 u8 *ml_elem_len; 1985 void *capab_pos; 1986 1987 if (!ieee80211_vif_is_mld(&sdata->vif)) 1988 return; 1989 1990 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1991 ieee80211_vif_type_p2p(&sdata->vif)); 1992 if (ift_ext_capa) { 1993 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1994 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1995 } 1996 1997 skb_put_u8(skb, WLAN_EID_EXTENSION); 1998 ml_elem_len = skb_put(skb, 1); 1999 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2000 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2001 ml_elem->control = 2002 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2003 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2004 common = skb_put(skb, sizeof(*common)); 2005 common->len = sizeof(*common) + 2006 2; /* MLD capa/ops */ 2007 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2008 2009 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2010 if (eml_capa & 2011 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2012 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2013 common->len += 2; /* EML capabilities */ 2014 ml_elem->control |= 2015 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2016 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2017 } 2018 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2019 2020 if (assoc_data->ext_mld_capa_ops) { 2021 ml_elem->control |= 2022 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2023 common->len += 2; 2024 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2025 sizeof(assoc_data->ext_mld_capa_ops)); 2026 } 2027 2028 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2029 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2030 const u8 *extra_elems; 2031 size_t extra_elems_len; 2032 size_t extra_used; 2033 u8 *subelem_len = NULL; 2034 __le16 ctrl; 2035 2036 if (!assoc_data->link[link_id].bss || 2037 link_id == assoc_data->assoc_link_id) 2038 continue; 2039 2040 extra_elems = assoc_data->link[link_id].elems; 2041 extra_elems_len = assoc_data->link[link_id].elems_len; 2042 2043 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2044 subelem_len = skb_put(skb, 1); 2045 2046 ctrl = cpu_to_le16(link_id | 2047 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2048 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2049 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2050 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2051 skb_put_data(skb, assoc_data->link[link_id].addr, 2052 ETH_ALEN); 2053 /* 2054 * Now add the contents of the (re)association request, 2055 * but the "listen interval" and "current AP address" 2056 * (if applicable) are skipped. So we only have 2057 * the capability field (remember the position and fill 2058 * later), followed by the elements added below by 2059 * calling ieee80211_add_link_elems(). 2060 */ 2061 capab_pos = skb_put(skb, 2); 2062 2063 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2064 ext_capa, 2065 extra_elems, 2066 extra_elems_len, 2067 link_id, NULL, 2068 link_present_elems, 2069 assoc_data); 2070 if (extra_elems) 2071 skb_put_data(skb, extra_elems + extra_used, 2072 extra_elems_len - extra_used); 2073 2074 put_unaligned_le16(capab, capab_pos); 2075 2076 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2077 link_present_elems); 2078 2079 ieee80211_fragment_element(skb, subelem_len, 2080 IEEE80211_MLE_SUBELEM_FRAGMENT); 2081 } 2082 2083 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2084 } 2085 2086 static int 2087 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2088 enum nl80211_iftype iftype, 2089 struct cfg80211_bss *cbss, 2090 size_t elems_len) 2091 { 2092 struct ieee80211_local *local = sdata->local; 2093 const struct ieee80211_sband_iftype_data *iftd; 2094 struct ieee80211_supported_band *sband; 2095 size_t size = 0; 2096 2097 if (!cbss) 2098 return size; 2099 2100 sband = local->hw.wiphy->bands[cbss->channel->band]; 2101 2102 /* add STA profile elements length */ 2103 size += elems_len; 2104 2105 /* and supported rates length */ 2106 size += 4 + sband->n_bitrates; 2107 2108 /* supported channels */ 2109 size += 2 + 2 * sband->n_channels; 2110 2111 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2112 if (iftd) 2113 size += iftd->vendor_elems.len; 2114 2115 /* power capability */ 2116 size += 4; 2117 2118 /* HT, VHT, HE, EHT */ 2119 size += 2 + sizeof(struct ieee80211_ht_cap); 2120 size += 2 + sizeof(struct ieee80211_vht_cap); 2121 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2122 sizeof(struct ieee80211_he_mcs_nss_supp) + 2123 IEEE80211_HE_PPE_THRES_MAX_LEN; 2124 2125 if (sband->band == NL80211_BAND_6GHZ) { 2126 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2127 /* reg connection */ 2128 size += 4; 2129 } 2130 2131 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2132 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2133 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2134 2135 return size; 2136 } 2137 2138 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2139 { 2140 struct ieee80211_local *local = sdata->local; 2141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2142 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2143 struct ieee80211_link_data *link; 2144 struct sk_buff *skb; 2145 struct ieee80211_mgmt *mgmt; 2146 u8 *pos, qos_info, *ie_start; 2147 size_t offset, noffset; 2148 u16 capab = 0, link_capab; 2149 __le16 listen_int; 2150 struct element *ext_capa = NULL; 2151 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2152 struct ieee80211_prep_tx_info info = {}; 2153 unsigned int link_id, n_links = 0; 2154 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2155 void *capab_pos; 2156 size_t size; 2157 int ret; 2158 2159 /* we know it's writable, cast away the const */ 2160 if (assoc_data->ie_len) 2161 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2162 assoc_data->ie, 2163 assoc_data->ie_len); 2164 2165 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2166 2167 size = local->hw.extra_tx_headroom + 2168 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2169 2 + assoc_data->ssid_len + /* SSID */ 2170 assoc_data->ie_len + /* extra IEs */ 2171 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2172 9; /* WMM */ 2173 2174 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2175 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2176 size_t elems_len = assoc_data->link[link_id].elems_len; 2177 2178 if (!cbss) 2179 continue; 2180 2181 n_links++; 2182 2183 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2184 elems_len); 2185 2186 /* non-inheritance element */ 2187 size += 2 + 2 + PRESENT_ELEMS_MAX; 2188 2189 /* should be the same across all BSSes */ 2190 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2191 capab |= WLAN_CAPABILITY_PRIVACY; 2192 } 2193 2194 if (ieee80211_vif_is_mld(&sdata->vif)) { 2195 /* consider the multi-link element with STA profile */ 2196 size += sizeof(struct ieee80211_multi_link_elem); 2197 /* max common info field in basic multi-link element */ 2198 size += sizeof(struct ieee80211_mle_basic_common_info) + 2199 2 + /* capa & op */ 2200 2 + /* ext capa & op */ 2201 2; /* EML capa */ 2202 2203 /* The capability elements were already considered above */ 2204 size += (n_links - 1) * 2205 (1 + 1 + /* subelement ID/length */ 2206 2 + /* STA control */ 2207 1 + ETH_ALEN + 2 /* STA Info field */); 2208 } 2209 2210 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2211 if (WARN_ON(!link)) 2212 return -EINVAL; 2213 2214 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2215 return -EINVAL; 2216 2217 skb = alloc_skb(size, GFP_KERNEL); 2218 if (!skb) 2219 return -ENOMEM; 2220 2221 skb_reserve(skb, local->hw.extra_tx_headroom); 2222 2223 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2224 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2225 2226 /* Set MBSSID support for HE AP if needed */ 2227 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2228 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2229 ext_capa && ext_capa->datalen >= 3) 2230 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2231 2232 mgmt = skb_put_zero(skb, 24); 2233 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2234 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2235 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2236 2237 listen_int = cpu_to_le16(assoc_data->s1g ? 2238 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2239 local->hw.conf.listen_interval); 2240 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2241 skb_put(skb, 10); 2242 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2243 IEEE80211_STYPE_REASSOC_REQ); 2244 capab_pos = &mgmt->u.reassoc_req.capab_info; 2245 mgmt->u.reassoc_req.listen_interval = listen_int; 2246 memcpy(mgmt->u.reassoc_req.current_ap, 2247 assoc_data->prev_ap_addr, ETH_ALEN); 2248 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2249 } else { 2250 skb_put(skb, 4); 2251 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2252 IEEE80211_STYPE_ASSOC_REQ); 2253 capab_pos = &mgmt->u.assoc_req.capab_info; 2254 mgmt->u.assoc_req.listen_interval = listen_int; 2255 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2256 } 2257 2258 /* SSID */ 2259 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2260 ie_start = pos; 2261 *pos++ = WLAN_EID_SSID; 2262 *pos++ = assoc_data->ssid_len; 2263 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2264 2265 /* 2266 * This bit is technically reserved, so it shouldn't matter for either 2267 * the AP or us, but it also means we shouldn't set it. However, we've 2268 * always set it in the past, and apparently some EHT APs check that 2269 * we don't set it. To avoid interoperability issues with old APs that 2270 * for some reason check it and want it to be set, set the bit for all 2271 * pre-EHT connections as we used to do. 2272 */ 2273 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2274 !ieee80211_hw_check(&local->hw, STRICT)) 2275 capab |= WLAN_CAPABILITY_ESS; 2276 2277 /* add the elements for the assoc (main) link */ 2278 link_capab = capab; 2279 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2280 ext_capa, 2281 assoc_data->ie, 2282 assoc_data->ie_len, 2283 assoc_data->assoc_link_id, link, 2284 present_elems, assoc_data); 2285 put_unaligned_le16(link_capab, capab_pos); 2286 2287 /* if present, add any custom non-vendor IEs */ 2288 if (assoc_data->ie_len) { 2289 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2290 assoc_data->ie_len, 2291 offset); 2292 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2293 offset = noffset; 2294 } 2295 2296 if (assoc_data->wmm) { 2297 if (assoc_data->uapsd) { 2298 qos_info = ifmgd->uapsd_queues; 2299 qos_info |= (ifmgd->uapsd_max_sp_len << 2300 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2301 } else { 2302 qos_info = 0; 2303 } 2304 2305 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2306 } 2307 2308 /* add any remaining custom (i.e. vendor specific here) IEs */ 2309 if (assoc_data->ie_len) { 2310 noffset = assoc_data->ie_len; 2311 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2312 } 2313 2314 if (assoc_data->fils_kek_len) { 2315 ret = fils_encrypt_assoc_req(skb, assoc_data); 2316 if (ret < 0) { 2317 dev_kfree_skb(skb); 2318 return ret; 2319 } 2320 } 2321 2322 pos = skb_tail_pointer(skb); 2323 kfree(ifmgd->assoc_req_ies); 2324 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2325 if (!ifmgd->assoc_req_ies) { 2326 dev_kfree_skb(skb); 2327 return -ENOMEM; 2328 } 2329 2330 ifmgd->assoc_req_ies_len = pos - ie_start; 2331 2332 info.link_id = assoc_data->assoc_link_id; 2333 drv_mgd_prepare_tx(local, sdata, &info); 2334 2335 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2336 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2337 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2338 IEEE80211_TX_INTFL_MLME_CONN_TX; 2339 ieee80211_tx_skb(sdata, skb); 2340 2341 return 0; 2342 } 2343 2344 void ieee80211_send_pspoll(struct ieee80211_local *local, 2345 struct ieee80211_sub_if_data *sdata) 2346 { 2347 struct ieee80211_pspoll *pspoll; 2348 struct sk_buff *skb; 2349 2350 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2351 if (!skb) 2352 return; 2353 2354 pspoll = (struct ieee80211_pspoll *) skb->data; 2355 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2356 2357 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2358 ieee80211_tx_skb(sdata, skb); 2359 } 2360 2361 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2362 struct ieee80211_sub_if_data *sdata, 2363 bool powersave) 2364 { 2365 struct sk_buff *skb; 2366 struct ieee80211_hdr_3addr *nullfunc; 2367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2368 2369 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2370 !ieee80211_hw_check(&local->hw, 2371 DOESNT_SUPPORT_QOS_NDP)); 2372 if (!skb) 2373 return; 2374 2375 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2376 if (powersave) 2377 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2378 2379 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2380 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2381 2382 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2383 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2384 2385 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2386 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2387 2388 ieee80211_tx_skb(sdata, skb); 2389 } 2390 2391 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2392 struct ieee80211_sub_if_data *sdata) 2393 { 2394 struct sk_buff *skb; 2395 struct ieee80211_hdr *nullfunc; 2396 __le16 fc; 2397 2398 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2399 return; 2400 2401 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2402 if (!skb) 2403 return; 2404 2405 skb_reserve(skb, local->hw.extra_tx_headroom); 2406 2407 nullfunc = skb_put_zero(skb, 30); 2408 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2409 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2410 nullfunc->frame_control = fc; 2411 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2412 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2413 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2414 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2415 2416 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2417 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2418 ieee80211_tx_skb(sdata, skb); 2419 } 2420 2421 /* spectrum management related things */ 2422 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2423 struct wiphy_work *work) 2424 { 2425 struct ieee80211_link_data *link = 2426 container_of(work, struct ieee80211_link_data, 2427 u.mgd.csa.switch_work.work); 2428 struct ieee80211_sub_if_data *sdata = link->sdata; 2429 struct ieee80211_local *local = sdata->local; 2430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2431 int ret; 2432 2433 if (!ieee80211_sdata_running(sdata)) 2434 return; 2435 2436 lockdep_assert_wiphy(local->hw.wiphy); 2437 2438 if (!ifmgd->associated) 2439 return; 2440 2441 if (!link->conf->csa_active) 2442 return; 2443 2444 /* 2445 * If the link isn't active (now), we cannot wait for beacons, won't 2446 * have a reserved chanctx, etc. Just switch over the chandef and 2447 * update cfg80211 directly. 2448 */ 2449 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2450 struct link_sta_info *link_sta; 2451 struct sta_info *ap_sta; 2452 2453 link->conf->chanreq = link->csa.chanreq; 2454 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2455 link->link_id); 2456 link->conf->csa_active = false; 2457 2458 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2459 if (WARN_ON(!ap_sta)) 2460 return; 2461 2462 link_sta = wiphy_dereference(wiphy, 2463 ap_sta->link[link->link_id]); 2464 if (WARN_ON(!link_sta)) 2465 return; 2466 2467 link_sta->pub->bandwidth = 2468 _ieee80211_sta_cur_vht_bw(link_sta, 2469 &link->csa.chanreq.oper); 2470 return; 2471 } 2472 2473 /* 2474 * using reservation isn't immediate as it may be deferred until later 2475 * with multi-vif. once reservation is complete it will re-schedule the 2476 * work with no reserved_chanctx so verify chandef to check if it 2477 * completed successfully 2478 */ 2479 2480 if (link->reserved_chanctx) { 2481 /* 2482 * with multi-vif csa driver may call ieee80211_csa_finish() 2483 * many times while waiting for other interfaces to use their 2484 * reservations 2485 */ 2486 if (link->reserved_ready) 2487 return; 2488 2489 ret = ieee80211_link_use_reserved_context(link); 2490 if (ret) { 2491 link_info(link, 2492 "failed to use reserved channel context, disconnecting (err=%d)\n", 2493 ret); 2494 wiphy_work_queue(sdata->local->hw.wiphy, 2495 &ifmgd->csa_connection_drop_work); 2496 } 2497 return; 2498 } 2499 2500 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2501 &link->csa.chanreq)) { 2502 link_info(link, 2503 "failed to finalize channel switch, disconnecting\n"); 2504 wiphy_work_queue(sdata->local->hw.wiphy, 2505 &ifmgd->csa_connection_drop_work); 2506 return; 2507 } 2508 2509 link->u.mgd.csa.waiting_bcn = true; 2510 2511 /* apply new TPE restrictions immediately on the new channel */ 2512 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2513 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2514 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2515 &link->u.mgd.csa.ap_chandef, 2516 &link->conf->chanreq.oper); 2517 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2518 sizeof(link->u.mgd.csa.tpe))) { 2519 link->conf->tpe = link->u.mgd.csa.tpe; 2520 ieee80211_link_info_change_notify(sdata, link, 2521 BSS_CHANGED_TPE); 2522 } 2523 } 2524 2525 /* 2526 * It is not necessary to reset these timers if any link does not 2527 * have an active CSA and that link still receives the beacons 2528 * when other links have active CSA. 2529 */ 2530 for_each_link_data(sdata, link) { 2531 if (!link->conf->csa_active) 2532 return; 2533 } 2534 2535 /* 2536 * Reset the beacon monitor and connection monitor timers when CSA 2537 * is active for all links in MLO when channel switch occurs in all 2538 * the links. 2539 */ 2540 ieee80211_sta_reset_beacon_monitor(sdata); 2541 ieee80211_sta_reset_conn_monitor(sdata); 2542 } 2543 2544 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2545 { 2546 struct ieee80211_sub_if_data *sdata = link->sdata; 2547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2548 int ret; 2549 2550 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2551 2552 WARN_ON(!link->conf->csa_active); 2553 2554 ieee80211_vif_unblock_queues_csa(sdata); 2555 2556 link->conf->csa_active = false; 2557 link->u.mgd.csa.blocked_tx = false; 2558 link->u.mgd.csa.waiting_bcn = false; 2559 2560 ret = drv_post_channel_switch(link); 2561 if (ret) { 2562 link_info(link, 2563 "driver post channel switch failed, disconnecting\n"); 2564 wiphy_work_queue(sdata->local->hw.wiphy, 2565 &ifmgd->csa_connection_drop_work); 2566 return; 2567 } 2568 2569 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2570 link->link_id); 2571 } 2572 2573 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2574 unsigned int link_id) 2575 { 2576 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2577 2578 trace_api_chswitch_done(sdata, success, link_id); 2579 2580 rcu_read_lock(); 2581 2582 if (!success) { 2583 sdata_info(sdata, 2584 "driver channel switch failed (link %d), disconnecting\n", 2585 link_id); 2586 wiphy_work_queue(sdata->local->hw.wiphy, 2587 &sdata->u.mgd.csa_connection_drop_work); 2588 } else { 2589 struct ieee80211_link_data *link = 2590 rcu_dereference(sdata->link[link_id]); 2591 2592 if (WARN_ON(!link)) { 2593 rcu_read_unlock(); 2594 return; 2595 } 2596 2597 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2598 &link->u.mgd.csa.switch_work, 0); 2599 } 2600 2601 rcu_read_unlock(); 2602 } 2603 EXPORT_SYMBOL(ieee80211_chswitch_done); 2604 2605 static void 2606 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2607 { 2608 struct ieee80211_sub_if_data *sdata = link->sdata; 2609 struct ieee80211_local *local = sdata->local; 2610 2611 lockdep_assert_wiphy(local->hw.wiphy); 2612 2613 if (!local->ops->abort_channel_switch) 2614 return; 2615 2616 if (rcu_access_pointer(link->conf->chanctx_conf)) 2617 ieee80211_link_unreserve_chanctx(link); 2618 2619 ieee80211_vif_unblock_queues_csa(sdata); 2620 2621 link->conf->csa_active = false; 2622 link->u.mgd.csa.blocked_tx = false; 2623 2624 drv_abort_channel_switch(link); 2625 } 2626 2627 struct sta_csa_rnr_iter_data { 2628 struct ieee80211_link_data *link; 2629 struct ieee80211_channel *chan; 2630 u8 mld_id; 2631 }; 2632 2633 static enum cfg80211_rnr_iter_ret 2634 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2635 const struct ieee80211_neighbor_ap_info *info, 2636 const u8 *tbtt_info, u8 tbtt_info_len) 2637 { 2638 struct sta_csa_rnr_iter_data *data = _data; 2639 struct ieee80211_link_data *link = data->link; 2640 struct ieee80211_sub_if_data *sdata = link->sdata; 2641 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2642 const struct ieee80211_tbtt_info_ge_11 *ti; 2643 enum nl80211_band band; 2644 unsigned int center_freq; 2645 int link_id; 2646 2647 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2648 return RNR_ITER_CONTINUE; 2649 2650 if (tbtt_info_len < sizeof(*ti)) 2651 return RNR_ITER_CONTINUE; 2652 2653 ti = (const void *)tbtt_info; 2654 2655 if (ti->mld_params.mld_id != data->mld_id) 2656 return RNR_ITER_CONTINUE; 2657 2658 link_id = le16_get_bits(ti->mld_params.params, 2659 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2660 if (link_id != data->link->link_id) 2661 return RNR_ITER_CONTINUE; 2662 2663 /* we found the entry for our link! */ 2664 2665 /* this AP is confused, it had this right before ... just disconnect */ 2666 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2667 link_info(link, 2668 "AP now has invalid operating class in RNR, disconnect\n"); 2669 wiphy_work_queue(sdata->local->hw.wiphy, 2670 &ifmgd->csa_connection_drop_work); 2671 return RNR_ITER_BREAK; 2672 } 2673 2674 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2675 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2676 2677 return RNR_ITER_BREAK; 2678 } 2679 2680 static void 2681 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2682 struct ieee802_11_elems *elems) 2683 { 2684 struct ieee80211_sub_if_data *sdata = link->sdata; 2685 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2686 struct sta_csa_rnr_iter_data data = { 2687 .link = link, 2688 }; 2689 2690 /* 2691 * If we get here, we see a beacon from another link without 2692 * CSA still being reported for it, so now we have to check 2693 * if the CSA was aborted or completed. This may not even be 2694 * perfectly possible if the CSA was only done for changing 2695 * the puncturing, but in that case if the link in inactive 2696 * we don't really care, and if it's an active link (or when 2697 * it's activated later) we'll get a beacon and adjust. 2698 */ 2699 2700 if (WARN_ON(!elems->ml_basic)) 2701 return; 2702 2703 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2704 2705 /* 2706 * So in order to do this, iterate the RNR element(s) and see 2707 * what channel is reported now. 2708 */ 2709 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2710 ieee80211_sta_csa_rnr_iter, &data); 2711 2712 if (!data.chan) { 2713 link_info(link, 2714 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2715 wiphy_work_queue(sdata->local->hw.wiphy, 2716 &ifmgd->csa_connection_drop_work); 2717 return; 2718 } 2719 2720 /* 2721 * If it doesn't match the CSA, then assume it aborted. This 2722 * may erroneously detect that it was _not_ aborted when it 2723 * was in fact aborted, but only changed the bandwidth or the 2724 * puncturing configuration, but we don't have enough data to 2725 * detect that. 2726 */ 2727 if (data.chan != link->csa.chanreq.oper.chan) 2728 ieee80211_sta_abort_chanswitch(link); 2729 } 2730 2731 enum ieee80211_csa_source { 2732 IEEE80211_CSA_SOURCE_BEACON, 2733 IEEE80211_CSA_SOURCE_OTHER_LINK, 2734 IEEE80211_CSA_SOURCE_PROT_ACTION, 2735 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2736 }; 2737 2738 static void 2739 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2740 u64 timestamp, u32 device_timestamp, 2741 struct ieee802_11_elems *full_elems, 2742 struct ieee802_11_elems *csa_elems, 2743 enum ieee80211_csa_source source) 2744 { 2745 struct ieee80211_sub_if_data *sdata = link->sdata; 2746 struct ieee80211_local *local = sdata->local; 2747 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2748 struct ieee80211_chanctx *chanctx = NULL; 2749 struct ieee80211_chanctx_conf *conf; 2750 struct ieee80211_csa_ie csa_ie = {}; 2751 struct ieee80211_channel_switch ch_switch = { 2752 .link_id = link->link_id, 2753 .timestamp = timestamp, 2754 .device_timestamp = device_timestamp, 2755 }; 2756 unsigned long now; 2757 int res; 2758 2759 lockdep_assert_wiphy(local->hw.wiphy); 2760 2761 if (csa_elems) { 2762 struct cfg80211_bss *cbss = link->conf->bss; 2763 enum nl80211_band current_band; 2764 struct ieee80211_bss *bss; 2765 2766 if (WARN_ON(!cbss)) 2767 return; 2768 2769 current_band = cbss->channel->band; 2770 bss = (void *)cbss->priv; 2771 2772 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2773 current_band, 2774 bss->vht_cap_info, 2775 &link->u.mgd.conn, 2776 link->u.mgd.bssid, 2777 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2778 &csa_ie); 2779 if (res == 0) { 2780 ch_switch.block_tx = csa_ie.mode; 2781 ch_switch.chandef = csa_ie.chanreq.oper; 2782 ch_switch.count = csa_ie.count; 2783 ch_switch.delay = csa_ie.max_switch_time; 2784 } 2785 2786 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2787 } else { 2788 /* 2789 * If there was no per-STA profile for this link, we 2790 * get called with csa_elems == NULL. This of course means 2791 * there are no CSA elements, so set res=1 indicating 2792 * no more CSA. 2793 */ 2794 res = 1; 2795 } 2796 2797 if (res < 0) { 2798 /* ignore this case, not a protected frame */ 2799 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2800 return; 2801 goto drop_connection; 2802 } 2803 2804 if (link->conf->csa_active) { 2805 switch (source) { 2806 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2807 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2808 /* already processing - disregard action frames */ 2809 return; 2810 case IEEE80211_CSA_SOURCE_BEACON: 2811 if (link->u.mgd.csa.waiting_bcn) { 2812 ieee80211_chswitch_post_beacon(link); 2813 /* 2814 * If the CSA is still present after the switch 2815 * we need to consider it as a new CSA (possibly 2816 * to self). This happens by not returning here 2817 * so we'll get to the check below. 2818 */ 2819 } else if (res) { 2820 ieee80211_sta_abort_chanswitch(link); 2821 return; 2822 } else { 2823 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2824 return; 2825 } 2826 break; 2827 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2828 /* active link: we want to see the beacon to continue */ 2829 if (ieee80211_vif_link_active(&sdata->vif, 2830 link->link_id)) 2831 return; 2832 2833 /* switch work ran, so just complete the process */ 2834 if (link->u.mgd.csa.waiting_bcn) { 2835 ieee80211_chswitch_post_beacon(link); 2836 /* 2837 * If the CSA is still present after the switch 2838 * we need to consider it as a new CSA (possibly 2839 * to self). This happens by not returning here 2840 * so we'll get to the check below. 2841 */ 2842 break; 2843 } 2844 2845 /* link still has CSA but we already know, do nothing */ 2846 if (!res) 2847 return; 2848 2849 /* check in the RNR if the CSA aborted */ 2850 ieee80211_sta_other_link_csa_disappeared(link, 2851 full_elems); 2852 return; 2853 } 2854 } 2855 2856 /* no active CSA nor a new one */ 2857 if (res) { 2858 /* 2859 * However, we may have stopped queues when receiving a public 2860 * action frame that couldn't be protected, if it had the quiet 2861 * bit set. This is a trade-off, we want to be quiet as soon as 2862 * possible, but also don't trust the public action frame much, 2863 * as it can't be protected. 2864 */ 2865 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2866 link->u.mgd.csa.blocked_tx = false; 2867 ieee80211_vif_unblock_queues_csa(sdata); 2868 } 2869 return; 2870 } 2871 2872 /* 2873 * We don't really trust public action frames, but block queues (go to 2874 * quiet mode) for them anyway, we should get a beacon soon to either 2875 * know what the CSA really is, or figure out the public action frame 2876 * was actually an attack. 2877 */ 2878 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2879 if (csa_ie.mode) { 2880 link->u.mgd.csa.blocked_tx = true; 2881 ieee80211_vif_block_queues_csa(sdata); 2882 } 2883 return; 2884 } 2885 2886 if (link->conf->chanreq.oper.chan->band != 2887 csa_ie.chanreq.oper.chan->band) { 2888 link_info(link, 2889 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2890 link->u.mgd.bssid, 2891 csa_ie.chanreq.oper.chan->center_freq, 2892 csa_ie.chanreq.oper.width, 2893 csa_ie.chanreq.oper.center_freq1, 2894 csa_ie.chanreq.oper.center_freq2); 2895 goto drop_connection; 2896 } 2897 2898 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2899 IEEE80211_CHAN_DISABLED)) { 2900 link_info(link, 2901 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2902 link->u.mgd.bssid, 2903 csa_ie.chanreq.oper.chan->center_freq, 2904 csa_ie.chanreq.oper.chan->freq_offset, 2905 csa_ie.chanreq.oper.width, 2906 csa_ie.chanreq.oper.center_freq1, 2907 csa_ie.chanreq.oper.freq1_offset, 2908 csa_ie.chanreq.oper.center_freq2); 2909 goto drop_connection; 2910 } 2911 2912 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2913 &link->conf->chanreq.oper) && 2914 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2915 if (link->u.mgd.csa.ignored_same_chan) 2916 return; 2917 link_info(link, 2918 "AP %pM tries to chanswitch to same channel, ignore\n", 2919 link->u.mgd.bssid); 2920 link->u.mgd.csa.ignored_same_chan = true; 2921 return; 2922 } 2923 2924 /* 2925 * Drop all TDLS peers on the affected link - either we disconnect or 2926 * move to a different channel from this point on. There's no telling 2927 * what our peer will do. 2928 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2929 * have an incompatible wider chandef. 2930 */ 2931 ieee80211_teardown_tdls_peers(link); 2932 2933 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2934 lockdep_is_held(&local->hw.wiphy->mtx)); 2935 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2936 link_info(link, 2937 "no channel context assigned to vif?, disconnecting\n"); 2938 goto drop_connection; 2939 } 2940 2941 if (conf) 2942 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2943 2944 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2945 link_info(link, 2946 "driver doesn't support chan-switch with channel contexts\n"); 2947 goto drop_connection; 2948 } 2949 2950 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2951 link_info(link, 2952 "preparing for channel switch failed, disconnecting\n"); 2953 goto drop_connection; 2954 } 2955 2956 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2957 2958 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2959 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2960 &csa_ie.chanreq.ap); 2961 2962 if (chanctx) { 2963 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2964 chanctx->mode, false); 2965 if (res) { 2966 link_info(link, 2967 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2968 res); 2969 goto drop_connection; 2970 } 2971 } 2972 2973 link->conf->csa_active = true; 2974 link->u.mgd.csa.ignored_same_chan = false; 2975 link->u.mgd.beacon_crc_valid = false; 2976 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2977 2978 if (csa_ie.mode) 2979 ieee80211_vif_block_queues_csa(sdata); 2980 2981 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2982 link->link_id, csa_ie.count, 2983 csa_ie.mode); 2984 2985 /* we may have to handle timeout for deactivated link in software */ 2986 now = jiffies; 2987 link->u.mgd.csa.time = now + 2988 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2989 link->conf->beacon_int); 2990 2991 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2992 local->ops->channel_switch) { 2993 /* 2994 * Use driver's channel switch callback, the driver will 2995 * later call ieee80211_chswitch_done(). It may deactivate 2996 * the link as well, we handle that elsewhere and queue 2997 * the csa.switch_work for the calculated time then. 2998 */ 2999 drv_channel_switch(local, sdata, &ch_switch); 3000 return; 3001 } 3002 3003 /* channel switch handled in software */ 3004 wiphy_delayed_work_queue(local->hw.wiphy, 3005 &link->u.mgd.csa.switch_work, 3006 link->u.mgd.csa.time - now); 3007 return; 3008 drop_connection: 3009 /* 3010 * This is just so that the disconnect flow will know that 3011 * we were trying to switch channel and failed. In case the 3012 * mode is 1 (we are not allowed to Tx), we will know not to 3013 * send a deauthentication frame. Those two fields will be 3014 * reset when the disconnection worker runs. 3015 */ 3016 link->conf->csa_active = true; 3017 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3018 3019 wiphy_work_queue(sdata->local->hw.wiphy, 3020 &ifmgd->csa_connection_drop_work); 3021 } 3022 3023 struct sta_bss_param_ch_cnt_data { 3024 struct ieee80211_sub_if_data *sdata; 3025 u8 reporting_link_id; 3026 u8 mld_id; 3027 }; 3028 3029 static enum cfg80211_rnr_iter_ret 3030 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3031 const struct ieee80211_neighbor_ap_info *info, 3032 const u8 *tbtt_info, u8 tbtt_info_len) 3033 { 3034 struct sta_bss_param_ch_cnt_data *data = _data; 3035 struct ieee80211_sub_if_data *sdata = data->sdata; 3036 const struct ieee80211_tbtt_info_ge_11 *ti; 3037 u8 bss_param_ch_cnt; 3038 int link_id; 3039 3040 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3041 return RNR_ITER_CONTINUE; 3042 3043 if (tbtt_info_len < sizeof(*ti)) 3044 return RNR_ITER_CONTINUE; 3045 3046 ti = (const void *)tbtt_info; 3047 3048 if (ti->mld_params.mld_id != data->mld_id) 3049 return RNR_ITER_CONTINUE; 3050 3051 link_id = le16_get_bits(ti->mld_params.params, 3052 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3053 bss_param_ch_cnt = 3054 le16_get_bits(ti->mld_params.params, 3055 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3056 3057 if (bss_param_ch_cnt != 255 && 3058 link_id < ARRAY_SIZE(sdata->link)) { 3059 struct ieee80211_link_data *link = 3060 sdata_dereference(sdata->link[link_id], sdata); 3061 3062 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3063 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3064 link->conf->bss_param_ch_cnt_link_id = 3065 data->reporting_link_id; 3066 } 3067 } 3068 3069 return RNR_ITER_CONTINUE; 3070 } 3071 3072 static void 3073 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3074 struct ieee80211_bss_conf *bss_conf, 3075 struct ieee802_11_elems *elems) 3076 { 3077 struct sta_bss_param_ch_cnt_data data = { 3078 .reporting_link_id = bss_conf->link_id, 3079 .sdata = sdata, 3080 }; 3081 int bss_param_ch_cnt; 3082 3083 if (!elems->ml_basic) 3084 return; 3085 3086 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3087 3088 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3089 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3090 3091 bss_param_ch_cnt = 3092 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3093 3094 /* 3095 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3096 * didn't change to indicate that we got a beacon on our own 3097 * link. 3098 */ 3099 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3100 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3101 bss_conf->bss_param_ch_cnt_link_id = 3102 bss_conf->link_id; 3103 } 3104 } 3105 3106 static bool 3107 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3108 const u8 *country_ie, u8 country_ie_len, 3109 const u8 *pwr_constr_elem, 3110 int *chan_pwr, int *pwr_reduction) 3111 { 3112 struct ieee80211_country_ie_triplet *triplet; 3113 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3114 int i, chan_increment; 3115 bool have_chan_pwr = false; 3116 3117 /* Invalid IE */ 3118 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3119 return false; 3120 3121 triplet = (void *)(country_ie + 3); 3122 country_ie_len -= 3; 3123 3124 switch (channel->band) { 3125 default: 3126 WARN_ON_ONCE(1); 3127 fallthrough; 3128 case NL80211_BAND_2GHZ: 3129 case NL80211_BAND_60GHZ: 3130 case NL80211_BAND_LC: 3131 chan_increment = 1; 3132 break; 3133 case NL80211_BAND_5GHZ: 3134 chan_increment = 4; 3135 break; 3136 case NL80211_BAND_6GHZ: 3137 /* 3138 * In the 6 GHz band, the "maximum transmit power level" 3139 * field in the triplets is reserved, and thus will be 3140 * zero and we shouldn't use it to control TX power. 3141 * The actual TX power will be given in the transmit 3142 * power envelope element instead. 3143 */ 3144 return false; 3145 } 3146 3147 /* find channel */ 3148 while (country_ie_len >= 3) { 3149 u8 first_channel = triplet->chans.first_channel; 3150 3151 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3152 goto next; 3153 3154 for (i = 0; i < triplet->chans.num_channels; i++) { 3155 if (first_channel + i * chan_increment == chan) { 3156 have_chan_pwr = true; 3157 *chan_pwr = triplet->chans.max_power; 3158 break; 3159 } 3160 } 3161 if (have_chan_pwr) 3162 break; 3163 3164 next: 3165 triplet++; 3166 country_ie_len -= 3; 3167 } 3168 3169 if (have_chan_pwr && pwr_constr_elem) 3170 *pwr_reduction = *pwr_constr_elem; 3171 else 3172 *pwr_reduction = 0; 3173 3174 return have_chan_pwr; 3175 } 3176 3177 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3178 const u8 *cisco_dtpc_ie, 3179 int *pwr_level) 3180 { 3181 /* From practical testing, the first data byte of the DTPC element 3182 * seems to contain the requested dBm level, and the CLI on Cisco 3183 * APs clearly state the range is -127 to 127 dBm, which indicates 3184 * a signed byte, although it seemingly never actually goes negative. 3185 * The other byte seems to always be zero. 3186 */ 3187 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3188 } 3189 3190 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3191 struct ieee80211_channel *channel, 3192 struct ieee80211_mgmt *mgmt, 3193 const u8 *country_ie, u8 country_ie_len, 3194 const u8 *pwr_constr_ie, 3195 const u8 *cisco_dtpc_ie) 3196 { 3197 struct ieee80211_sub_if_data *sdata = link->sdata; 3198 bool has_80211h_pwr = false, has_cisco_pwr = false; 3199 int chan_pwr = 0, pwr_reduction_80211h = 0; 3200 int pwr_level_cisco, pwr_level_80211h; 3201 int new_ap_level; 3202 __le16 capab = mgmt->u.probe_resp.capab_info; 3203 3204 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3205 return 0; /* TODO */ 3206 3207 if (country_ie && 3208 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3209 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3210 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3211 channel, country_ie, country_ie_len, 3212 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3213 pwr_level_80211h = 3214 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3215 } 3216 3217 if (cisco_dtpc_ie) { 3218 ieee80211_find_cisco_dtpc( 3219 channel, cisco_dtpc_ie, &pwr_level_cisco); 3220 has_cisco_pwr = true; 3221 } 3222 3223 if (!has_80211h_pwr && !has_cisco_pwr) 3224 return 0; 3225 3226 /* If we have both 802.11h and Cisco DTPC, apply both limits 3227 * by picking the smallest of the two power levels advertised. 3228 */ 3229 if (has_80211h_pwr && 3230 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3231 new_ap_level = pwr_level_80211h; 3232 3233 if (link->ap_power_level == new_ap_level) 3234 return 0; 3235 3236 sdata_dbg(sdata, 3237 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3238 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3239 link->u.mgd.bssid); 3240 } else { /* has_cisco_pwr is always true here. */ 3241 new_ap_level = pwr_level_cisco; 3242 3243 if (link->ap_power_level == new_ap_level) 3244 return 0; 3245 3246 sdata_dbg(sdata, 3247 "Limiting TX power to %d dBm as advertised by %pM\n", 3248 pwr_level_cisco, link->u.mgd.bssid); 3249 } 3250 3251 link->ap_power_level = new_ap_level; 3252 if (__ieee80211_recalc_txpower(link)) 3253 return BSS_CHANGED_TXPOWER; 3254 return 0; 3255 } 3256 3257 /* powersave */ 3258 static void ieee80211_enable_ps(struct ieee80211_local *local, 3259 struct ieee80211_sub_if_data *sdata) 3260 { 3261 struct ieee80211_conf *conf = &local->hw.conf; 3262 3263 /* 3264 * If we are scanning right now then the parameters will 3265 * take effect when scan finishes. 3266 */ 3267 if (local->scanning) 3268 return; 3269 3270 if (conf->dynamic_ps_timeout > 0 && 3271 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3272 mod_timer(&local->dynamic_ps_timer, jiffies + 3273 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3274 } else { 3275 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3276 ieee80211_send_nullfunc(local, sdata, true); 3277 3278 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3279 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3280 return; 3281 3282 conf->flags |= IEEE80211_CONF_PS; 3283 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3284 } 3285 } 3286 3287 static void ieee80211_change_ps(struct ieee80211_local *local) 3288 { 3289 struct ieee80211_conf *conf = &local->hw.conf; 3290 3291 if (local->ps_sdata) { 3292 ieee80211_enable_ps(local, local->ps_sdata); 3293 } else if (conf->flags & IEEE80211_CONF_PS) { 3294 conf->flags &= ~IEEE80211_CONF_PS; 3295 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3296 timer_delete_sync(&local->dynamic_ps_timer); 3297 wiphy_work_cancel(local->hw.wiphy, 3298 &local->dynamic_ps_enable_work); 3299 } 3300 } 3301 3302 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3303 { 3304 struct ieee80211_local *local = sdata->local; 3305 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3306 struct sta_info *sta = NULL; 3307 bool authorized = false; 3308 3309 if (!mgd->powersave) 3310 return false; 3311 3312 if (mgd->broken_ap) 3313 return false; 3314 3315 if (!mgd->associated) 3316 return false; 3317 3318 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3319 return false; 3320 3321 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3322 !sdata->deflink.u.mgd.have_beacon) 3323 return false; 3324 3325 rcu_read_lock(); 3326 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3327 if (sta) 3328 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3329 rcu_read_unlock(); 3330 3331 return authorized; 3332 } 3333 3334 /* need to hold RTNL or interface lock */ 3335 void ieee80211_recalc_ps(struct ieee80211_local *local) 3336 { 3337 struct ieee80211_sub_if_data *sdata, *found = NULL; 3338 int count = 0; 3339 int timeout; 3340 3341 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3342 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3343 local->ps_sdata = NULL; 3344 return; 3345 } 3346 3347 list_for_each_entry(sdata, &local->interfaces, list) { 3348 if (!ieee80211_sdata_running(sdata)) 3349 continue; 3350 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3351 /* If an AP vif is found, then disable PS 3352 * by setting the count to zero thereby setting 3353 * ps_sdata to NULL. 3354 */ 3355 count = 0; 3356 break; 3357 } 3358 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3359 continue; 3360 found = sdata; 3361 count++; 3362 } 3363 3364 if (count == 1 && ieee80211_powersave_allowed(found)) { 3365 u8 dtimper = found->deflink.u.mgd.dtim_period; 3366 3367 timeout = local->dynamic_ps_forced_timeout; 3368 if (timeout < 0) 3369 timeout = 100; 3370 local->hw.conf.dynamic_ps_timeout = timeout; 3371 3372 /* If the TIM IE is invalid, pretend the value is 1 */ 3373 if (!dtimper) 3374 dtimper = 1; 3375 3376 local->hw.conf.ps_dtim_period = dtimper; 3377 local->ps_sdata = found; 3378 } else { 3379 local->ps_sdata = NULL; 3380 } 3381 3382 ieee80211_change_ps(local); 3383 } 3384 3385 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3386 { 3387 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3388 3389 if (sdata->vif.cfg.ps != ps_allowed) { 3390 sdata->vif.cfg.ps = ps_allowed; 3391 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3392 } 3393 } 3394 3395 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3396 struct wiphy_work *work) 3397 { 3398 struct ieee80211_local *local = 3399 container_of(work, struct ieee80211_local, 3400 dynamic_ps_disable_work); 3401 3402 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3403 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3404 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3405 } 3406 3407 ieee80211_wake_queues_by_reason(&local->hw, 3408 IEEE80211_MAX_QUEUE_MAP, 3409 IEEE80211_QUEUE_STOP_REASON_PS, 3410 false); 3411 } 3412 3413 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3414 struct wiphy_work *work) 3415 { 3416 struct ieee80211_local *local = 3417 container_of(work, struct ieee80211_local, 3418 dynamic_ps_enable_work); 3419 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3420 struct ieee80211_if_managed *ifmgd; 3421 unsigned long flags; 3422 int q; 3423 3424 /* can only happen when PS was just disabled anyway */ 3425 if (!sdata) 3426 return; 3427 3428 ifmgd = &sdata->u.mgd; 3429 3430 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3431 return; 3432 3433 if (local->hw.conf.dynamic_ps_timeout > 0) { 3434 /* don't enter PS if TX frames are pending */ 3435 if (drv_tx_frames_pending(local)) { 3436 mod_timer(&local->dynamic_ps_timer, jiffies + 3437 msecs_to_jiffies( 3438 local->hw.conf.dynamic_ps_timeout)); 3439 return; 3440 } 3441 3442 /* 3443 * transmission can be stopped by others which leads to 3444 * dynamic_ps_timer expiry. Postpone the ps timer if it 3445 * is not the actual idle state. 3446 */ 3447 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3448 for (q = 0; q < local->hw.queues; q++) { 3449 if (local->queue_stop_reasons[q]) { 3450 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3451 flags); 3452 mod_timer(&local->dynamic_ps_timer, jiffies + 3453 msecs_to_jiffies( 3454 local->hw.conf.dynamic_ps_timeout)); 3455 return; 3456 } 3457 } 3458 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3459 } 3460 3461 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3462 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3463 if (drv_tx_frames_pending(local)) { 3464 mod_timer(&local->dynamic_ps_timer, jiffies + 3465 msecs_to_jiffies( 3466 local->hw.conf.dynamic_ps_timeout)); 3467 } else { 3468 ieee80211_send_nullfunc(local, sdata, true); 3469 /* Flush to get the tx status of nullfunc frame */ 3470 ieee80211_flush_queues(local, sdata, false); 3471 } 3472 } 3473 3474 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3475 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3476 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3477 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3478 local->hw.conf.flags |= IEEE80211_CONF_PS; 3479 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3480 } 3481 } 3482 3483 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3484 { 3485 struct ieee80211_local *local = timer_container_of(local, t, 3486 dynamic_ps_timer); 3487 3488 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3489 } 3490 3491 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3492 { 3493 struct ieee80211_link_data *link = 3494 container_of(work, struct ieee80211_link_data, 3495 dfs_cac_timer_work.work); 3496 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3497 struct ieee80211_sub_if_data *sdata = link->sdata; 3498 3499 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3500 3501 if (sdata->wdev.links[link->link_id].cac_started) { 3502 ieee80211_link_release_channel(link); 3503 cfg80211_cac_event(sdata->dev, &chandef, 3504 NL80211_RADAR_CAC_FINISHED, 3505 GFP_KERNEL, link->link_id); 3506 } 3507 } 3508 3509 static bool 3510 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3511 { 3512 struct ieee80211_local *local = sdata->local; 3513 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3514 bool ret = false; 3515 int ac; 3516 3517 if (local->hw.queues < IEEE80211_NUM_ACS) 3518 return false; 3519 3520 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3521 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3522 int non_acm_ac; 3523 unsigned long now = jiffies; 3524 3525 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3526 tx_tspec->admitted_time && 3527 time_after(now, tx_tspec->time_slice_start + HZ)) { 3528 tx_tspec->consumed_tx_time = 0; 3529 tx_tspec->time_slice_start = now; 3530 3531 if (tx_tspec->downgraded) 3532 tx_tspec->action = 3533 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3534 } 3535 3536 switch (tx_tspec->action) { 3537 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3538 /* take the original parameters */ 3539 if (drv_conf_tx(local, &sdata->deflink, ac, 3540 &sdata->deflink.tx_conf[ac])) 3541 link_err(&sdata->deflink, 3542 "failed to set TX queue parameters for queue %d\n", 3543 ac); 3544 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3545 tx_tspec->downgraded = false; 3546 ret = true; 3547 break; 3548 case TX_TSPEC_ACTION_DOWNGRADE: 3549 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3550 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3551 ret = true; 3552 break; 3553 } 3554 /* downgrade next lower non-ACM AC */ 3555 for (non_acm_ac = ac + 1; 3556 non_acm_ac < IEEE80211_NUM_ACS; 3557 non_acm_ac++) 3558 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3559 break; 3560 /* Usually the loop will result in using BK even if it 3561 * requires admission control, but such a configuration 3562 * makes no sense and we have to transmit somehow - the 3563 * AC selection does the same thing. 3564 * If we started out trying to downgrade from BK, then 3565 * the extra condition here might be needed. 3566 */ 3567 if (non_acm_ac >= IEEE80211_NUM_ACS) 3568 non_acm_ac = IEEE80211_AC_BK; 3569 if (drv_conf_tx(local, &sdata->deflink, ac, 3570 &sdata->deflink.tx_conf[non_acm_ac])) 3571 link_err(&sdata->deflink, 3572 "failed to set TX queue parameters for queue %d\n", 3573 ac); 3574 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3575 ret = true; 3576 wiphy_delayed_work_queue(local->hw.wiphy, 3577 &ifmgd->tx_tspec_wk, 3578 tx_tspec->time_slice_start + 3579 HZ - now + 1); 3580 break; 3581 case TX_TSPEC_ACTION_NONE: 3582 /* nothing now */ 3583 break; 3584 } 3585 } 3586 3587 return ret; 3588 } 3589 3590 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3591 { 3592 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3593 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3594 BSS_CHANGED_QOS); 3595 } 3596 3597 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3598 struct wiphy_work *work) 3599 { 3600 struct ieee80211_sub_if_data *sdata; 3601 3602 sdata = container_of(work, struct ieee80211_sub_if_data, 3603 u.mgd.tx_tspec_wk.work); 3604 ieee80211_sta_handle_tspec_ac_params(sdata); 3605 } 3606 3607 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3608 { 3609 struct ieee80211_sub_if_data *sdata = link->sdata; 3610 struct ieee80211_local *local = sdata->local; 3611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3612 struct ieee80211_tx_queue_params *params = link->tx_conf; 3613 u8 ac; 3614 3615 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3616 mlme_dbg(sdata, 3617 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3618 ac, params[ac].acm, 3619 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3620 params[ac].txop, params[ac].uapsd, 3621 ifmgd->tx_tspec[ac].downgraded); 3622 if (!ifmgd->tx_tspec[ac].downgraded && 3623 drv_conf_tx(local, link, ac, ¶ms[ac])) 3624 link_err(link, 3625 "failed to set TX queue parameters for AC %d\n", 3626 ac); 3627 } 3628 } 3629 3630 /* MLME */ 3631 static bool 3632 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3633 struct ieee80211_link_data *link, 3634 const u8 *wmm_param, size_t wmm_param_len, 3635 const struct ieee80211_mu_edca_param_set *mu_edca) 3636 { 3637 struct ieee80211_sub_if_data *sdata = link->sdata; 3638 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3639 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3640 size_t left; 3641 int count, mu_edca_count, ac; 3642 const u8 *pos; 3643 u8 uapsd_queues = 0; 3644 3645 if (!local->ops->conf_tx) 3646 return false; 3647 3648 if (local->hw.queues < IEEE80211_NUM_ACS) 3649 return false; 3650 3651 if (!wmm_param) 3652 return false; 3653 3654 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3655 return false; 3656 3657 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3658 uapsd_queues = ifmgd->uapsd_queues; 3659 3660 count = wmm_param[6] & 0x0f; 3661 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3662 * if mu_edca was preset before and now it disappeared tell 3663 * the driver about it. 3664 */ 3665 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3666 if (count == link->u.mgd.wmm_last_param_set && 3667 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3668 return false; 3669 link->u.mgd.wmm_last_param_set = count; 3670 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3671 3672 pos = wmm_param + 8; 3673 left = wmm_param_len - 8; 3674 3675 memset(¶ms, 0, sizeof(params)); 3676 3677 sdata->wmm_acm = 0; 3678 for (; left >= 4; left -= 4, pos += 4) { 3679 int aci = (pos[0] >> 5) & 0x03; 3680 int acm = (pos[0] >> 4) & 0x01; 3681 bool uapsd = false; 3682 3683 switch (aci) { 3684 case 1: /* AC_BK */ 3685 ac = IEEE80211_AC_BK; 3686 if (acm) 3687 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3688 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3689 uapsd = true; 3690 params[ac].mu_edca = !!mu_edca; 3691 if (mu_edca) 3692 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3693 break; 3694 case 2: /* AC_VI */ 3695 ac = IEEE80211_AC_VI; 3696 if (acm) 3697 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3698 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3699 uapsd = true; 3700 params[ac].mu_edca = !!mu_edca; 3701 if (mu_edca) 3702 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3703 break; 3704 case 3: /* AC_VO */ 3705 ac = IEEE80211_AC_VO; 3706 if (acm) 3707 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3708 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3709 uapsd = true; 3710 params[ac].mu_edca = !!mu_edca; 3711 if (mu_edca) 3712 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3713 break; 3714 case 0: /* AC_BE */ 3715 default: 3716 ac = IEEE80211_AC_BE; 3717 if (acm) 3718 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3719 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3720 uapsd = true; 3721 params[ac].mu_edca = !!mu_edca; 3722 if (mu_edca) 3723 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3724 break; 3725 } 3726 3727 params[ac].aifs = pos[0] & 0x0f; 3728 3729 if (params[ac].aifs < 2) { 3730 link_info(link, 3731 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3732 params[ac].aifs, aci); 3733 params[ac].aifs = 2; 3734 } 3735 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3736 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3737 params[ac].txop = get_unaligned_le16(pos + 2); 3738 params[ac].acm = acm; 3739 params[ac].uapsd = uapsd; 3740 3741 if (params[ac].cw_min == 0 || 3742 params[ac].cw_min > params[ac].cw_max) { 3743 link_info(link, 3744 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3745 params[ac].cw_min, params[ac].cw_max, aci); 3746 return false; 3747 } 3748 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3749 } 3750 3751 /* WMM specification requires all 4 ACIs. */ 3752 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3753 if (params[ac].cw_min == 0) { 3754 link_info(link, 3755 "AP has invalid WMM params (missing AC %d), using defaults\n", 3756 ac); 3757 return false; 3758 } 3759 } 3760 3761 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3762 link->tx_conf[ac] = params[ac]; 3763 3764 return true; 3765 } 3766 3767 static bool 3768 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3769 struct ieee80211_link_data *link, 3770 const u8 *wmm_param, size_t wmm_param_len, 3771 const struct ieee80211_mu_edca_param_set *mu_edca) 3772 { 3773 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3774 mu_edca)) 3775 return false; 3776 3777 ieee80211_mgd_set_link_qos_params(link); 3778 3779 /* enable WMM or activate new settings */ 3780 link->conf->qos = true; 3781 return true; 3782 } 3783 3784 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3785 { 3786 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3787 3788 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3789 ieee80211_run_deferred_scan(sdata->local); 3790 } 3791 3792 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3793 { 3794 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3795 3796 __ieee80211_stop_poll(sdata); 3797 } 3798 3799 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3800 u16 capab, bool erp_valid, u8 erp) 3801 { 3802 struct ieee80211_bss_conf *bss_conf = link->conf; 3803 struct ieee80211_supported_band *sband; 3804 u64 changed = 0; 3805 bool use_protection; 3806 bool use_short_preamble; 3807 bool use_short_slot; 3808 3809 sband = ieee80211_get_link_sband(link); 3810 if (!sband) 3811 return changed; 3812 3813 if (erp_valid) { 3814 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3815 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3816 } else { 3817 use_protection = false; 3818 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3819 } 3820 3821 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3822 if (sband->band == NL80211_BAND_5GHZ || 3823 sband->band == NL80211_BAND_6GHZ) 3824 use_short_slot = true; 3825 3826 if (use_protection != bss_conf->use_cts_prot) { 3827 bss_conf->use_cts_prot = use_protection; 3828 changed |= BSS_CHANGED_ERP_CTS_PROT; 3829 } 3830 3831 if (use_short_preamble != bss_conf->use_short_preamble) { 3832 bss_conf->use_short_preamble = use_short_preamble; 3833 changed |= BSS_CHANGED_ERP_PREAMBLE; 3834 } 3835 3836 if (use_short_slot != bss_conf->use_short_slot) { 3837 bss_conf->use_short_slot = use_short_slot; 3838 changed |= BSS_CHANGED_ERP_SLOT; 3839 } 3840 3841 return changed; 3842 } 3843 3844 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3845 struct cfg80211_bss *cbss) 3846 { 3847 struct ieee80211_sub_if_data *sdata = link->sdata; 3848 struct ieee80211_bss_conf *bss_conf = link->conf; 3849 struct ieee80211_bss *bss = (void *)cbss->priv; 3850 u64 changed = BSS_CHANGED_QOS; 3851 3852 /* not really used in MLO */ 3853 sdata->u.mgd.beacon_timeout = 3854 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3855 bss_conf->beacon_int)); 3856 3857 changed |= ieee80211_handle_bss_capability(link, 3858 bss_conf->assoc_capability, 3859 bss->has_erp_value, 3860 bss->erp_value); 3861 3862 ieee80211_check_rate_mask(link); 3863 3864 link->conf->bss = cbss; 3865 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3866 3867 if (sdata->vif.p2p || 3868 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3869 const struct cfg80211_bss_ies *ies; 3870 3871 rcu_read_lock(); 3872 ies = rcu_dereference(cbss->ies); 3873 if (ies) { 3874 int ret; 3875 3876 ret = cfg80211_get_p2p_attr( 3877 ies->data, ies->len, 3878 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3879 (u8 *) &bss_conf->p2p_noa_attr, 3880 sizeof(bss_conf->p2p_noa_attr)); 3881 if (ret >= 2) { 3882 link->u.mgd.p2p_noa_index = 3883 bss_conf->p2p_noa_attr.index; 3884 changed |= BSS_CHANGED_P2P_PS; 3885 } 3886 } 3887 rcu_read_unlock(); 3888 } 3889 3890 if (link->u.mgd.have_beacon) { 3891 bss_conf->beacon_rate = bss->beacon_rate; 3892 changed |= BSS_CHANGED_BEACON_INFO; 3893 } else { 3894 bss_conf->beacon_rate = NULL; 3895 } 3896 3897 /* Tell the driver to monitor connection quality (if supported) */ 3898 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3899 bss_conf->cqm_rssi_thold) 3900 changed |= BSS_CHANGED_CQM; 3901 3902 return changed; 3903 } 3904 3905 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3906 struct ieee80211_mgd_assoc_data *assoc_data, 3907 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3908 { 3909 struct ieee80211_local *local = sdata->local; 3910 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3911 u64 vif_changed = BSS_CHANGED_ASSOC; 3912 unsigned int link_id; 3913 3914 lockdep_assert_wiphy(local->hw.wiphy); 3915 3916 sdata->u.mgd.associated = true; 3917 3918 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3919 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3920 struct ieee80211_link_data *link; 3921 3922 if (!cbss || 3923 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3924 continue; 3925 3926 if (ieee80211_vif_is_mld(&sdata->vif) && 3927 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3928 continue; 3929 3930 link = sdata_dereference(sdata->link[link_id], sdata); 3931 if (WARN_ON(!link)) 3932 return; 3933 3934 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3935 } 3936 3937 /* just to be sure */ 3938 ieee80211_stop_poll(sdata); 3939 3940 ieee80211_led_assoc(local, 1); 3941 3942 vif_cfg->assoc = 1; 3943 3944 /* Enable ARP filtering */ 3945 if (vif_cfg->arp_addr_cnt) 3946 vif_changed |= BSS_CHANGED_ARP_FILTER; 3947 3948 if (ieee80211_vif_is_mld(&sdata->vif)) { 3949 for (link_id = 0; 3950 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3951 link_id++) { 3952 struct ieee80211_link_data *link; 3953 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3954 3955 if (!cbss || 3956 !(BIT(link_id) & 3957 ieee80211_vif_usable_links(&sdata->vif)) || 3958 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3959 continue; 3960 3961 link = sdata_dereference(sdata->link[link_id], sdata); 3962 if (WARN_ON(!link)) 3963 return; 3964 3965 ieee80211_link_info_change_notify(sdata, link, 3966 changed[link_id]); 3967 3968 ieee80211_recalc_smps(sdata, link); 3969 } 3970 3971 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3972 } else { 3973 ieee80211_bss_info_change_notify(sdata, 3974 vif_changed | changed[0]); 3975 } 3976 3977 ieee80211_recalc_ps(local); 3978 3979 /* leave this here to not change ordering in non-MLO cases */ 3980 if (!ieee80211_vif_is_mld(&sdata->vif)) 3981 ieee80211_recalc_smps(sdata, &sdata->deflink); 3982 ieee80211_recalc_ps_vif(sdata); 3983 3984 netif_carrier_on(sdata->dev); 3985 } 3986 3987 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3988 { 3989 struct ieee80211_mgd_assoc_data *add_links_data = 3990 sdata->u.mgd.reconf.add_links_data; 3991 3992 if (!ieee80211_vif_is_mld(&sdata->vif) || 3993 !(sdata->u.mgd.reconf.added_links | 3994 sdata->u.mgd.reconf.removed_links)) 3995 return; 3996 3997 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3998 &sdata->u.mgd.reconf.wk); 3999 sdata->u.mgd.reconf.added_links = 0; 4000 sdata->u.mgd.reconf.removed_links = 0; 4001 sdata->u.mgd.reconf.dialog_token = 0; 4002 4003 if (add_links_data) { 4004 struct cfg80211_mlo_reconf_done_data done_data = {}; 4005 u8 link_id; 4006 4007 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4008 link_id++) 4009 done_data.links[link_id].bss = 4010 add_links_data->link[link_id].bss; 4011 4012 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4013 4014 kfree(sdata->u.mgd.reconf.add_links_data); 4015 sdata->u.mgd.reconf.add_links_data = NULL; 4016 } 4017 } 4018 4019 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4020 u16 stype, u16 reason, bool tx, 4021 u8 *frame_buf) 4022 { 4023 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4024 struct ieee80211_local *local = sdata->local; 4025 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4026 unsigned int link_id; 4027 u64 changed = 0; 4028 struct ieee80211_prep_tx_info info = { 4029 .subtype = stype, 4030 .was_assoc = true, 4031 .link_id = ffs(sdata->vif.active_links) - 1, 4032 }; 4033 4034 lockdep_assert_wiphy(local->hw.wiphy); 4035 4036 if (frame_buf) 4037 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4038 4039 if (WARN_ON(!ap_sta)) 4040 return; 4041 4042 if (WARN_ON_ONCE(tx && !frame_buf)) 4043 return; 4044 4045 if (WARN_ON(!ifmgd->associated)) 4046 return; 4047 4048 ieee80211_stop_poll(sdata); 4049 4050 ifmgd->associated = false; 4051 4052 if (tx) { 4053 bool tx_link_found = false; 4054 4055 for (link_id = 0; 4056 link_id < ARRAY_SIZE(sdata->link); 4057 link_id++) { 4058 struct ieee80211_link_data *link; 4059 4060 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4061 continue; 4062 4063 link = sdata_dereference(sdata->link[link_id], sdata); 4064 if (WARN_ON_ONCE(!link)) 4065 continue; 4066 4067 if (link->u.mgd.csa.blocked_tx) 4068 continue; 4069 4070 tx_link_found = true; 4071 break; 4072 } 4073 4074 tx = tx_link_found; 4075 } 4076 4077 /* other links will be destroyed */ 4078 sdata->deflink.conf->bss = NULL; 4079 sdata->deflink.conf->epcs_support = false; 4080 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4081 4082 netif_carrier_off(sdata->dev); 4083 4084 /* 4085 * if we want to get out of ps before disassoc (why?) we have 4086 * to do it before sending disassoc, as otherwise the null-packet 4087 * won't be valid. 4088 */ 4089 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4090 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4091 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4092 } 4093 local->ps_sdata = NULL; 4094 4095 /* disable per-vif ps */ 4096 ieee80211_recalc_ps_vif(sdata); 4097 4098 /* make sure ongoing transmission finishes */ 4099 synchronize_net(); 4100 4101 /* 4102 * drop any frame before deauth/disassoc, this can be data or 4103 * management frame. Since we are disconnecting, we should not 4104 * insist sending these frames which can take time and delay 4105 * the disconnection and possible the roaming. 4106 */ 4107 ieee80211_flush_queues(local, sdata, true); 4108 4109 if (tx) { 4110 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4111 4112 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4113 sdata->vif.cfg.ap_addr, stype, 4114 reason, true, frame_buf); 4115 4116 /* flush out frame - make sure the deauth was actually sent */ 4117 ieee80211_flush_queues(local, sdata, false); 4118 4119 drv_mgd_complete_tx(sdata->local, sdata, &info); 4120 } else if (frame_buf) { 4121 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4122 sdata->vif.cfg.ap_addr, stype, 4123 reason, false, frame_buf); 4124 } 4125 4126 /* clear AP addr only after building the needed mgmt frames */ 4127 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4128 eth_zero_addr(sdata->vif.cfg.ap_addr); 4129 4130 sdata->vif.cfg.ssid_len = 0; 4131 4132 /* Remove TDLS peers */ 4133 __sta_info_flush(sdata, false, -1, ap_sta); 4134 4135 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4136 /* Only move the AP state */ 4137 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4138 } else { 4139 /* Remove AP peer */ 4140 sta_info_flush(sdata, -1); 4141 } 4142 4143 /* finally reset all BSS / config parameters */ 4144 if (!ieee80211_vif_is_mld(&sdata->vif)) 4145 changed |= ieee80211_reset_erp_info(sdata); 4146 4147 ieee80211_led_assoc(local, 0); 4148 changed |= BSS_CHANGED_ASSOC; 4149 sdata->vif.cfg.assoc = false; 4150 4151 sdata->deflink.u.mgd.p2p_noa_index = -1; 4152 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4153 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4154 4155 /* on the next assoc, re-program HT/VHT parameters */ 4156 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4157 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4158 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4159 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4160 4161 /* 4162 * reset MU-MIMO ownership and group data in default link, 4163 * if used, other links are destroyed 4164 */ 4165 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4166 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4167 memset(sdata->vif.bss_conf.mu_group.position, 0, 4168 sizeof(sdata->vif.bss_conf.mu_group.position)); 4169 if (!ieee80211_vif_is_mld(&sdata->vif)) 4170 changed |= BSS_CHANGED_MU_GROUPS; 4171 sdata->vif.bss_conf.mu_mimo_owner = false; 4172 4173 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4174 4175 timer_delete_sync(&local->dynamic_ps_timer); 4176 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4177 4178 /* Disable ARP filtering */ 4179 if (sdata->vif.cfg.arp_addr_cnt) 4180 changed |= BSS_CHANGED_ARP_FILTER; 4181 4182 sdata->vif.bss_conf.qos = false; 4183 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4184 changed |= BSS_CHANGED_QOS; 4185 /* The BSSID (not really interesting) and HT changed */ 4186 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4187 ieee80211_bss_info_change_notify(sdata, changed); 4188 } else { 4189 ieee80211_vif_cfg_change_notify(sdata, changed); 4190 } 4191 4192 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4193 /* 4194 * After notifying the driver about the disassoc, 4195 * remove the ap sta. 4196 */ 4197 sta_info_flush(sdata, -1); 4198 } 4199 4200 /* disassociated - set to defaults now */ 4201 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4202 4203 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4204 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4205 timer_delete_sync(&sdata->u.mgd.timer); 4206 4207 sdata->vif.bss_conf.dtim_period = 0; 4208 sdata->vif.bss_conf.beacon_rate = NULL; 4209 4210 sdata->deflink.u.mgd.have_beacon = false; 4211 sdata->deflink.u.mgd.tracking_signal_avg = false; 4212 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4213 4214 ifmgd->flags = 0; 4215 4216 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4217 struct ieee80211_link_data *link; 4218 4219 link = sdata_dereference(sdata->link[link_id], sdata); 4220 if (!link) 4221 continue; 4222 ieee80211_link_release_channel(link); 4223 } 4224 4225 sdata->vif.bss_conf.csa_active = false; 4226 sdata->deflink.u.mgd.csa.blocked_tx = false; 4227 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4228 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4229 ieee80211_vif_unblock_queues_csa(sdata); 4230 4231 /* existing TX TSPEC sessions no longer exist */ 4232 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4233 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4234 4235 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4236 sdata->vif.bss_conf.pwr_reduction = 0; 4237 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4238 4239 sdata->vif.cfg.eml_cap = 0; 4240 sdata->vif.cfg.eml_med_sync_delay = 0; 4241 sdata->vif.cfg.mld_capa_op = 0; 4242 4243 memset(&sdata->u.mgd.ttlm_info, 0, 4244 sizeof(sdata->u.mgd.ttlm_info)); 4245 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4246 4247 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4248 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4249 &ifmgd->neg_ttlm_timeout_work); 4250 4251 sdata->u.mgd.removed_links = 0; 4252 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4253 &sdata->u.mgd.ml_reconf_work); 4254 4255 wiphy_work_cancel(sdata->local->hw.wiphy, 4256 &ifmgd->teardown_ttlm_work); 4257 4258 /* if disconnection happens in the middle of the ML reconfiguration 4259 * flow, cfg80211 must called to release the BSS references obtained 4260 * when the flow started. 4261 */ 4262 ieee80211_ml_reconf_reset(sdata); 4263 4264 ieee80211_vif_set_links(sdata, 0, 0); 4265 4266 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4267 4268 ifmgd->epcs.enabled = false; 4269 ifmgd->epcs.dialog_token = 0; 4270 4271 memset(ifmgd->userspace_selectors, 0, 4272 sizeof(ifmgd->userspace_selectors)); 4273 } 4274 4275 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4276 { 4277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4278 struct ieee80211_local *local = sdata->local; 4279 4280 lockdep_assert_wiphy(local->hw.wiphy); 4281 4282 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4283 return; 4284 4285 __ieee80211_stop_poll(sdata); 4286 4287 ieee80211_recalc_ps(local); 4288 4289 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4290 return; 4291 4292 /* 4293 * We've received a probe response, but are not sure whether 4294 * we have or will be receiving any beacons or data, so let's 4295 * schedule the timers again, just in case. 4296 */ 4297 ieee80211_sta_reset_beacon_monitor(sdata); 4298 4299 mod_timer(&ifmgd->conn_mon_timer, 4300 round_jiffies_up(jiffies + 4301 IEEE80211_CONNECTION_IDLE_TIME)); 4302 } 4303 4304 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4305 struct ieee80211_hdr *hdr, 4306 u16 tx_time) 4307 { 4308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4309 u16 tid; 4310 int ac; 4311 struct ieee80211_sta_tx_tspec *tx_tspec; 4312 unsigned long now = jiffies; 4313 4314 if (!ieee80211_is_data_qos(hdr->frame_control)) 4315 return; 4316 4317 tid = ieee80211_get_tid(hdr); 4318 ac = ieee80211_ac_from_tid(tid); 4319 tx_tspec = &ifmgd->tx_tspec[ac]; 4320 4321 if (likely(!tx_tspec->admitted_time)) 4322 return; 4323 4324 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4325 tx_tspec->consumed_tx_time = 0; 4326 tx_tspec->time_slice_start = now; 4327 4328 if (tx_tspec->downgraded) { 4329 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4330 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4331 &ifmgd->tx_tspec_wk, 0); 4332 } 4333 } 4334 4335 if (tx_tspec->downgraded) 4336 return; 4337 4338 tx_tspec->consumed_tx_time += tx_time; 4339 4340 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4341 tx_tspec->downgraded = true; 4342 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4343 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4344 &ifmgd->tx_tspec_wk, 0); 4345 } 4346 } 4347 4348 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4349 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4350 { 4351 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4352 4353 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4354 !sdata->u.mgd.probe_send_count) 4355 return; 4356 4357 if (ack) 4358 sdata->u.mgd.probe_send_count = 0; 4359 else 4360 sdata->u.mgd.nullfunc_failed = true; 4361 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4362 } 4363 4364 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4365 const u8 *src, const u8 *dst, 4366 const u8 *ssid, size_t ssid_len, 4367 struct ieee80211_channel *channel) 4368 { 4369 struct sk_buff *skb; 4370 4371 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4372 ssid, ssid_len, NULL, 0, 4373 IEEE80211_PROBE_FLAG_DIRECTED); 4374 if (skb) 4375 ieee80211_tx_skb(sdata, skb); 4376 } 4377 4378 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4379 { 4380 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4381 u8 *dst = sdata->vif.cfg.ap_addr; 4382 u8 unicast_limit = max(1, max_probe_tries - 3); 4383 struct sta_info *sta; 4384 4385 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4386 4387 /* 4388 * Try sending broadcast probe requests for the last three 4389 * probe requests after the first ones failed since some 4390 * buggy APs only support broadcast probe requests. 4391 */ 4392 if (ifmgd->probe_send_count >= unicast_limit) 4393 dst = NULL; 4394 4395 /* 4396 * When the hardware reports an accurate Tx ACK status, it's 4397 * better to send a nullfunc frame instead of a probe request, 4398 * as it will kick us off the AP quickly if we aren't associated 4399 * anymore. The timeout will be reset if the frame is ACKed by 4400 * the AP. 4401 */ 4402 ifmgd->probe_send_count++; 4403 4404 if (dst) { 4405 sta = sta_info_get(sdata, dst); 4406 if (!WARN_ON(!sta)) 4407 ieee80211_check_fast_rx(sta); 4408 } 4409 4410 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4411 ifmgd->nullfunc_failed = false; 4412 ieee80211_send_nullfunc(sdata->local, sdata, false); 4413 } else { 4414 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4415 sdata->vif.cfg.ssid, 4416 sdata->vif.cfg.ssid_len, 4417 sdata->deflink.conf->bss->channel); 4418 } 4419 4420 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4421 run_again(sdata, ifmgd->probe_timeout); 4422 } 4423 4424 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4425 bool beacon) 4426 { 4427 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4428 bool already = false; 4429 4430 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4431 4432 if (!ieee80211_sdata_running(sdata)) 4433 return; 4434 4435 if (!ifmgd->associated) 4436 return; 4437 4438 if (sdata->local->tmp_channel || sdata->local->scanning) 4439 return; 4440 4441 if (sdata->local->suspending) { 4442 /* reschedule after resume */ 4443 ieee80211_reset_ap_probe(sdata); 4444 return; 4445 } 4446 4447 if (beacon) { 4448 mlme_dbg_ratelimited(sdata, 4449 "detected beacon loss from AP (missed %d beacons) - probing\n", 4450 beacon_loss_count); 4451 4452 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4453 } 4454 4455 /* 4456 * The driver/our work has already reported this event or the 4457 * connection monitoring has kicked in and we have already sent 4458 * a probe request. Or maybe the AP died and the driver keeps 4459 * reporting until we disassociate... 4460 * 4461 * In either case we have to ignore the current call to this 4462 * function (except for setting the correct probe reason bit) 4463 * because otherwise we would reset the timer every time and 4464 * never check whether we received a probe response! 4465 */ 4466 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4467 already = true; 4468 4469 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4470 4471 if (already) 4472 return; 4473 4474 ieee80211_recalc_ps(sdata->local); 4475 4476 ifmgd->probe_send_count = 0; 4477 ieee80211_mgd_probe_ap_send(sdata); 4478 } 4479 4480 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4481 struct ieee80211_vif *vif) 4482 { 4483 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4484 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4485 struct cfg80211_bss *cbss; 4486 struct sk_buff *skb; 4487 const struct element *ssid; 4488 int ssid_len; 4489 4490 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4491 4492 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4493 ieee80211_vif_is_mld(&sdata->vif))) 4494 return NULL; 4495 4496 if (ifmgd->associated) 4497 cbss = sdata->deflink.conf->bss; 4498 else if (ifmgd->auth_data) 4499 cbss = ifmgd->auth_data->bss; 4500 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4501 cbss = ifmgd->assoc_data->link[0].bss; 4502 else 4503 return NULL; 4504 4505 rcu_read_lock(); 4506 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4507 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4508 "invalid SSID element (len=%d)", 4509 ssid ? ssid->datalen : -1)) 4510 ssid_len = 0; 4511 else 4512 ssid_len = ssid->datalen; 4513 4514 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4515 (u32) -1, cbss->channel, 4516 ssid->data, ssid_len, 4517 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4518 rcu_read_unlock(); 4519 4520 return skb; 4521 } 4522 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4523 4524 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4525 const u8 *buf, size_t len, bool tx, 4526 u16 reason, bool reconnect) 4527 { 4528 struct ieee80211_event event = { 4529 .type = MLME_EVENT, 4530 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4531 .u.mlme.reason = reason, 4532 }; 4533 4534 if (tx) 4535 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4536 else 4537 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4538 4539 drv_event_callback(sdata->local, sdata, &event); 4540 } 4541 4542 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4543 { 4544 struct ieee80211_local *local = sdata->local; 4545 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4546 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4547 4548 lockdep_assert_wiphy(local->hw.wiphy); 4549 4550 if (!ifmgd->associated) 4551 return; 4552 4553 if (!ifmgd->driver_disconnect) { 4554 unsigned int link_id; 4555 4556 /* 4557 * AP is probably out of range (or not reachable for another 4558 * reason) so remove the bss structs for that AP. In the case 4559 * of multi-link, it's not clear that all of them really are 4560 * out of range, but if they weren't the driver likely would 4561 * have switched to just have a single link active? 4562 */ 4563 for (link_id = 0; 4564 link_id < ARRAY_SIZE(sdata->link); 4565 link_id++) { 4566 struct ieee80211_link_data *link; 4567 4568 link = sdata_dereference(sdata->link[link_id], sdata); 4569 if (!link || !link->conf->bss) 4570 continue; 4571 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4572 link->conf->bss = NULL; 4573 } 4574 } 4575 4576 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4577 ifmgd->driver_disconnect ? 4578 WLAN_REASON_DEAUTH_LEAVING : 4579 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4580 true, frame_buf); 4581 /* the other links will be destroyed */ 4582 sdata->vif.bss_conf.csa_active = false; 4583 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4584 sdata->deflink.u.mgd.csa.blocked_tx = false; 4585 ieee80211_vif_unblock_queues_csa(sdata); 4586 4587 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4588 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4589 ifmgd->reconnect); 4590 ifmgd->reconnect = false; 4591 } 4592 4593 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4594 struct wiphy_work *work) 4595 { 4596 struct ieee80211_sub_if_data *sdata = 4597 container_of(work, struct ieee80211_sub_if_data, 4598 u.mgd.beacon_connection_loss_work); 4599 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4600 4601 if (ifmgd->connection_loss) { 4602 sdata_info(sdata, "Connection to AP %pM lost\n", 4603 sdata->vif.cfg.ap_addr); 4604 __ieee80211_disconnect(sdata); 4605 ifmgd->connection_loss = false; 4606 } else if (ifmgd->driver_disconnect) { 4607 sdata_info(sdata, 4608 "Driver requested disconnection from AP %pM\n", 4609 sdata->vif.cfg.ap_addr); 4610 __ieee80211_disconnect(sdata); 4611 ifmgd->driver_disconnect = false; 4612 } else { 4613 if (ifmgd->associated) 4614 sdata->deflink.u.mgd.beacon_loss_count++; 4615 ieee80211_mgd_probe_ap(sdata, true); 4616 } 4617 } 4618 4619 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4620 struct wiphy_work *work) 4621 { 4622 struct ieee80211_sub_if_data *sdata = 4623 container_of(work, struct ieee80211_sub_if_data, 4624 u.mgd.csa_connection_drop_work); 4625 4626 __ieee80211_disconnect(sdata); 4627 } 4628 4629 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4630 { 4631 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4632 struct ieee80211_hw *hw = &sdata->local->hw; 4633 4634 trace_api_beacon_loss(sdata); 4635 4636 sdata->u.mgd.connection_loss = false; 4637 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4638 } 4639 EXPORT_SYMBOL(ieee80211_beacon_loss); 4640 4641 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4642 { 4643 struct ieee80211_sub_if_data *sdata; 4644 struct ieee80211_hw *hw; 4645 4646 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4647 4648 sdata = vif_to_sdata(vif); 4649 hw = &sdata->local->hw; 4650 4651 trace_api_connection_loss(sdata); 4652 4653 sdata->u.mgd.connection_loss = true; 4654 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4655 } 4656 EXPORT_SYMBOL(ieee80211_connection_loss); 4657 4658 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4659 { 4660 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4661 struct ieee80211_hw *hw = &sdata->local->hw; 4662 4663 trace_api_disconnect(sdata, reconnect); 4664 4665 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4666 return; 4667 4668 sdata->u.mgd.driver_disconnect = true; 4669 sdata->u.mgd.reconnect = reconnect; 4670 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4671 } 4672 EXPORT_SYMBOL(ieee80211_disconnect); 4673 4674 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4675 bool assoc) 4676 { 4677 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4678 4679 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4680 4681 sdata->u.mgd.auth_data = NULL; 4682 4683 if (!assoc) { 4684 /* 4685 * we are not authenticated yet, the only timer that could be 4686 * running is the timeout for the authentication response which 4687 * which is not relevant anymore. 4688 */ 4689 timer_delete_sync(&sdata->u.mgd.timer); 4690 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4691 4692 /* other links are destroyed */ 4693 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4694 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4695 BSS_CHANGED_BSSID); 4696 sdata->u.mgd.flags = 0; 4697 4698 ieee80211_link_release_channel(&sdata->deflink); 4699 ieee80211_vif_set_links(sdata, 0, 0); 4700 } 4701 4702 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4703 kfree(auth_data); 4704 } 4705 4706 enum assoc_status { 4707 ASSOC_SUCCESS, 4708 ASSOC_REJECTED, 4709 ASSOC_TIMEOUT, 4710 ASSOC_ABANDON, 4711 }; 4712 4713 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4714 enum assoc_status status) 4715 { 4716 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4717 4718 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4719 4720 sdata->u.mgd.assoc_data = NULL; 4721 4722 if (status != ASSOC_SUCCESS) { 4723 /* 4724 * we are not associated yet, the only timer that could be 4725 * running is the timeout for the association response which 4726 * which is not relevant anymore. 4727 */ 4728 timer_delete_sync(&sdata->u.mgd.timer); 4729 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4730 4731 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4732 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4733 BSS_CHANGED_BSSID); 4734 sdata->u.mgd.flags = 0; 4735 sdata->vif.bss_conf.mu_mimo_owner = false; 4736 4737 if (status != ASSOC_REJECTED) { 4738 struct cfg80211_assoc_failure data = { 4739 .timeout = status == ASSOC_TIMEOUT, 4740 }; 4741 int i; 4742 4743 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4744 ARRAY_SIZE(assoc_data->link)); 4745 4746 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4747 data.bss[i] = assoc_data->link[i].bss; 4748 4749 if (ieee80211_vif_is_mld(&sdata->vif)) 4750 data.ap_mld_addr = assoc_data->ap_addr; 4751 4752 cfg80211_assoc_failure(sdata->dev, &data); 4753 } 4754 4755 ieee80211_link_release_channel(&sdata->deflink); 4756 ieee80211_vif_set_links(sdata, 0, 0); 4757 } 4758 4759 kfree(assoc_data); 4760 } 4761 4762 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4763 struct ieee80211_mgmt *mgmt, size_t len) 4764 { 4765 struct ieee80211_local *local = sdata->local; 4766 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4767 const struct element *challenge; 4768 u8 *pos; 4769 u32 tx_flags = 0; 4770 struct ieee80211_prep_tx_info info = { 4771 .subtype = IEEE80211_STYPE_AUTH, 4772 .link_id = auth_data->link_id, 4773 }; 4774 4775 pos = mgmt->u.auth.variable; 4776 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4777 len - (pos - (u8 *)mgmt)); 4778 if (!challenge) 4779 return; 4780 auth_data->expected_transaction = 4; 4781 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4782 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4783 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4784 IEEE80211_TX_INTFL_MLME_CONN_TX; 4785 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4786 (void *)challenge, 4787 challenge->datalen + sizeof(*challenge), 4788 auth_data->ap_addr, auth_data->ap_addr, 4789 auth_data->key, auth_data->key_len, 4790 auth_data->key_idx, tx_flags); 4791 } 4792 4793 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4794 { 4795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4796 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4797 struct sta_info *sta; 4798 4799 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4800 4801 sdata_info(sdata, "authenticated\n"); 4802 ifmgd->auth_data->done = true; 4803 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4804 ifmgd->auth_data->timeout_started = true; 4805 run_again(sdata, ifmgd->auth_data->timeout); 4806 4807 /* move station state to auth */ 4808 sta = sta_info_get(sdata, ap_addr); 4809 if (!sta) { 4810 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4811 return false; 4812 } 4813 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4814 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4815 return false; 4816 } 4817 4818 return true; 4819 } 4820 4821 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4822 struct ieee80211_mgmt *mgmt, size_t len) 4823 { 4824 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4825 u16 auth_alg, auth_transaction, status_code; 4826 struct ieee80211_event event = { 4827 .type = MLME_EVENT, 4828 .u.mlme.data = AUTH_EVENT, 4829 }; 4830 struct ieee80211_prep_tx_info info = { 4831 .subtype = IEEE80211_STYPE_AUTH, 4832 }; 4833 bool sae_need_confirm = false; 4834 4835 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4836 4837 if (len < 24 + 6) 4838 return; 4839 4840 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4841 return; 4842 4843 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4844 return; 4845 4846 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4847 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4848 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4849 4850 info.link_id = ifmgd->auth_data->link_id; 4851 4852 if (auth_alg != ifmgd->auth_data->algorithm || 4853 (auth_alg != WLAN_AUTH_SAE && 4854 auth_transaction != ifmgd->auth_data->expected_transaction) || 4855 (auth_alg == WLAN_AUTH_SAE && 4856 (auth_transaction < ifmgd->auth_data->expected_transaction || 4857 auth_transaction > 2))) { 4858 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4859 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4860 auth_transaction, 4861 ifmgd->auth_data->expected_transaction); 4862 goto notify_driver; 4863 } 4864 4865 if (status_code != WLAN_STATUS_SUCCESS) { 4866 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4867 4868 if (auth_alg == WLAN_AUTH_SAE && 4869 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4870 (auth_transaction == 1 && 4871 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4872 status_code == WLAN_STATUS_SAE_PK)))) { 4873 /* waiting for userspace now */ 4874 ifmgd->auth_data->waiting = true; 4875 ifmgd->auth_data->timeout = 4876 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4877 ifmgd->auth_data->timeout_started = true; 4878 run_again(sdata, ifmgd->auth_data->timeout); 4879 if (auth_transaction == 1) 4880 sae_need_confirm = true; 4881 goto notify_driver; 4882 } 4883 4884 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4885 mgmt->sa, status_code); 4886 ieee80211_destroy_auth_data(sdata, false); 4887 event.u.mlme.status = MLME_DENIED; 4888 event.u.mlme.reason = status_code; 4889 drv_event_callback(sdata->local, sdata, &event); 4890 goto notify_driver; 4891 } 4892 4893 switch (ifmgd->auth_data->algorithm) { 4894 case WLAN_AUTH_OPEN: 4895 case WLAN_AUTH_LEAP: 4896 case WLAN_AUTH_FT: 4897 case WLAN_AUTH_SAE: 4898 case WLAN_AUTH_FILS_SK: 4899 case WLAN_AUTH_FILS_SK_PFS: 4900 case WLAN_AUTH_FILS_PK: 4901 break; 4902 case WLAN_AUTH_SHARED_KEY: 4903 if (ifmgd->auth_data->expected_transaction != 4) { 4904 ieee80211_auth_challenge(sdata, mgmt, len); 4905 /* need another frame */ 4906 return; 4907 } 4908 break; 4909 default: 4910 WARN_ONCE(1, "invalid auth alg %d", 4911 ifmgd->auth_data->algorithm); 4912 goto notify_driver; 4913 } 4914 4915 event.u.mlme.status = MLME_SUCCESS; 4916 info.success = 1; 4917 drv_event_callback(sdata->local, sdata, &event); 4918 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4919 (auth_transaction == 2 && 4920 ifmgd->auth_data->expected_transaction == 2)) { 4921 if (!ieee80211_mark_sta_auth(sdata)) 4922 return; /* ignore frame -- wait for timeout */ 4923 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4924 auth_transaction == 1) { 4925 sae_need_confirm = true; 4926 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4927 auth_transaction == 2) { 4928 sdata_info(sdata, "SAE peer confirmed\n"); 4929 ifmgd->auth_data->peer_confirmed = true; 4930 } 4931 4932 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4933 notify_driver: 4934 if (!sae_need_confirm) 4935 drv_mgd_complete_tx(sdata->local, sdata, &info); 4936 } 4937 4938 #define case_WLAN(type) \ 4939 case WLAN_REASON_##type: return #type 4940 4941 const char *ieee80211_get_reason_code_string(u16 reason_code) 4942 { 4943 switch (reason_code) { 4944 case_WLAN(UNSPECIFIED); 4945 case_WLAN(PREV_AUTH_NOT_VALID); 4946 case_WLAN(DEAUTH_LEAVING); 4947 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4948 case_WLAN(DISASSOC_AP_BUSY); 4949 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4950 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4951 case_WLAN(DISASSOC_STA_HAS_LEFT); 4952 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4953 case_WLAN(DISASSOC_BAD_POWER); 4954 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4955 case_WLAN(INVALID_IE); 4956 case_WLAN(MIC_FAILURE); 4957 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4958 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4959 case_WLAN(IE_DIFFERENT); 4960 case_WLAN(INVALID_GROUP_CIPHER); 4961 case_WLAN(INVALID_PAIRWISE_CIPHER); 4962 case_WLAN(INVALID_AKMP); 4963 case_WLAN(UNSUPP_RSN_VERSION); 4964 case_WLAN(INVALID_RSN_IE_CAP); 4965 case_WLAN(IEEE8021X_FAILED); 4966 case_WLAN(CIPHER_SUITE_REJECTED); 4967 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4968 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4969 case_WLAN(DISASSOC_LOW_ACK); 4970 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4971 case_WLAN(QSTA_LEAVE_QBSS); 4972 case_WLAN(QSTA_NOT_USE); 4973 case_WLAN(QSTA_REQUIRE_SETUP); 4974 case_WLAN(QSTA_TIMEOUT); 4975 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4976 case_WLAN(MESH_PEER_CANCELED); 4977 case_WLAN(MESH_MAX_PEERS); 4978 case_WLAN(MESH_CONFIG); 4979 case_WLAN(MESH_CLOSE); 4980 case_WLAN(MESH_MAX_RETRIES); 4981 case_WLAN(MESH_CONFIRM_TIMEOUT); 4982 case_WLAN(MESH_INVALID_GTK); 4983 case_WLAN(MESH_INCONSISTENT_PARAM); 4984 case_WLAN(MESH_INVALID_SECURITY); 4985 case_WLAN(MESH_PATH_ERROR); 4986 case_WLAN(MESH_PATH_NOFORWARD); 4987 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4988 case_WLAN(MAC_EXISTS_IN_MBSS); 4989 case_WLAN(MESH_CHAN_REGULATORY); 4990 case_WLAN(MESH_CHAN); 4991 default: return "<unknown>"; 4992 } 4993 } 4994 4995 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4996 struct ieee80211_mgmt *mgmt, size_t len) 4997 { 4998 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4999 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5000 5001 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5002 5003 if (len < 24 + 2) 5004 return; 5005 5006 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5007 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5008 return; 5009 } 5010 5011 if (ifmgd->associated && 5012 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5013 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5014 sdata->vif.cfg.ap_addr, reason_code, 5015 ieee80211_get_reason_code_string(reason_code)); 5016 5017 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5018 5019 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5020 reason_code, false); 5021 return; 5022 } 5023 5024 if (ifmgd->assoc_data && 5025 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5026 sdata_info(sdata, 5027 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5028 ifmgd->assoc_data->ap_addr, reason_code, 5029 ieee80211_get_reason_code_string(reason_code)); 5030 5031 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5032 5033 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5034 return; 5035 } 5036 } 5037 5038 5039 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5040 struct ieee80211_mgmt *mgmt, size_t len) 5041 { 5042 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5043 u16 reason_code; 5044 5045 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5046 5047 if (len < 24 + 2) 5048 return; 5049 5050 if (!ifmgd->associated || 5051 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5052 return; 5053 5054 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5055 5056 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5057 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5058 return; 5059 } 5060 5061 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5062 sdata->vif.cfg.ap_addr, reason_code, 5063 ieee80211_get_reason_code_string(reason_code)); 5064 5065 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5066 5067 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5068 false); 5069 } 5070 5071 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5072 struct ieee80211_supported_band *sband, 5073 const struct link_sta_info *link_sta, 5074 const struct ieee802_11_elems *elems) 5075 { 5076 const struct ieee80211_sta_he_cap *own_he_cap = 5077 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5078 5079 if (elems->ext_capab_len < 10) 5080 return false; 5081 5082 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5083 return false; 5084 5085 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5086 IEEE80211_HE_MAC_CAP0_TWT_RES && 5087 own_he_cap && 5088 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5089 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5090 } 5091 5092 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5093 struct ieee80211_supported_band *sband, 5094 struct ieee80211_link_data *link, 5095 struct link_sta_info *link_sta, 5096 struct ieee802_11_elems *elems) 5097 { 5098 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5099 5100 if (link->conf->twt_requester != twt) { 5101 link->conf->twt_requester = twt; 5102 return BSS_CHANGED_TWT; 5103 } 5104 return 0; 5105 } 5106 5107 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5108 struct ieee80211_bss_conf *bss_conf, 5109 struct ieee80211_supported_band *sband, 5110 struct link_sta_info *link_sta) 5111 { 5112 const struct ieee80211_sta_he_cap *own_he_cap = 5113 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5114 5115 return bss_conf->he_support && 5116 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5117 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5118 own_he_cap && 5119 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5120 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5121 } 5122 5123 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5124 bool enabled) 5125 { 5126 /* in any case this is called, dialog token should be reset */ 5127 sdata->u.mgd.epcs.dialog_token = 0; 5128 5129 if (sdata->u.mgd.epcs.enabled == enabled) 5130 return; 5131 5132 sdata->u.mgd.epcs.enabled = enabled; 5133 cfg80211_epcs_changed(sdata->dev, enabled); 5134 } 5135 5136 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5137 { 5138 struct ieee80211_local *local = sdata->local; 5139 u8 link_id; 5140 5141 if (!sdata->u.mgd.epcs.enabled) 5142 return; 5143 5144 lockdep_assert_wiphy(local->hw.wiphy); 5145 5146 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5147 struct ieee802_11_elems *elems; 5148 struct ieee80211_link_data *link; 5149 const struct cfg80211_bss_ies *ies; 5150 bool ret; 5151 5152 rcu_read_lock(); 5153 5154 link = sdata_dereference(sdata->link[link_id], sdata); 5155 if (!link || !link->conf || !link->conf->bss) { 5156 rcu_read_unlock(); 5157 continue; 5158 } 5159 5160 if (link->u.mgd.disable_wmm_tracking) { 5161 rcu_read_unlock(); 5162 ieee80211_set_wmm_default(link, false, false); 5163 continue; 5164 } 5165 5166 ies = rcu_dereference(link->conf->bss->beacon_ies); 5167 if (!ies) { 5168 rcu_read_unlock(); 5169 ieee80211_set_wmm_default(link, false, false); 5170 continue; 5171 } 5172 5173 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5174 NULL); 5175 if (!elems) { 5176 rcu_read_unlock(); 5177 ieee80211_set_wmm_default(link, false, false); 5178 continue; 5179 } 5180 5181 ret = _ieee80211_sta_wmm_params(local, link, 5182 elems->wmm_param, 5183 elems->wmm_param_len, 5184 elems->mu_edca_param_set); 5185 5186 kfree(elems); 5187 rcu_read_unlock(); 5188 5189 if (!ret) { 5190 ieee80211_set_wmm_default(link, false, false); 5191 continue; 5192 } 5193 5194 ieee80211_mgd_set_link_qos_params(link); 5195 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5196 } 5197 } 5198 5199 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5200 struct link_sta_info *link_sta, 5201 struct cfg80211_bss *cbss, 5202 struct ieee80211_mgmt *mgmt, 5203 const u8 *elem_start, 5204 unsigned int elem_len, 5205 u64 *changed) 5206 { 5207 struct ieee80211_sub_if_data *sdata = link->sdata; 5208 struct ieee80211_mgd_assoc_data *assoc_data = 5209 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5210 struct ieee80211_bss_conf *bss_conf = link->conf; 5211 struct ieee80211_local *local = sdata->local; 5212 unsigned int link_id = link->link_id; 5213 struct ieee80211_elems_parse_params parse_params = { 5214 .mode = link->u.mgd.conn.mode, 5215 .start = elem_start, 5216 .len = elem_len, 5217 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5218 .from_ap = true, 5219 }; 5220 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5221 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5222 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5223 const struct cfg80211_bss_ies *bss_ies = NULL; 5224 struct ieee80211_supported_band *sband; 5225 struct ieee802_11_elems *elems; 5226 const __le16 prof_bss_param_ch_present = 5227 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5228 u16 capab_info; 5229 bool ret; 5230 5231 elems = ieee802_11_parse_elems_full(&parse_params); 5232 if (!elems) 5233 return false; 5234 5235 if (link_id == assoc_data->assoc_link_id) { 5236 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5237 5238 /* 5239 * we should not get to this flow unless the association was 5240 * successful, so set the status directly to success 5241 */ 5242 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5243 if (elems->ml_basic) { 5244 int bss_param_ch_cnt = 5245 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5246 5247 if (bss_param_ch_cnt < 0) { 5248 ret = false; 5249 goto out; 5250 } 5251 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5252 bss_conf->bss_param_ch_cnt_link_id = link_id; 5253 } 5254 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5255 !elems->prof || 5256 !(elems->prof->control & prof_bss_param_ch_present)) { 5257 ret = false; 5258 goto out; 5259 } else { 5260 const u8 *ptr = elems->prof->variable + 5261 elems->prof->sta_info_len - 1; 5262 int bss_param_ch_cnt; 5263 5264 /* 5265 * During parsing, we validated that these fields exist, 5266 * otherwise elems->prof would have been set to NULL. 5267 */ 5268 capab_info = get_unaligned_le16(ptr); 5269 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5270 bss_param_ch_cnt = 5271 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5272 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5273 bss_conf->bss_param_ch_cnt_link_id = link_id; 5274 5275 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5276 link_info(link, "association response status code=%u\n", 5277 assoc_data->link[link_id].status); 5278 ret = true; 5279 goto out; 5280 } 5281 } 5282 5283 if (!is_s1g && !elems->supp_rates) { 5284 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5285 ret = false; 5286 goto out; 5287 } 5288 5289 link->u.mgd.tdls_chan_switch_prohibited = 5290 elems->ext_capab && elems->ext_capab_len >= 5 && 5291 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5292 5293 /* 5294 * Some APs are erroneously not including some information in their 5295 * (re)association response frames. Try to recover by using the data 5296 * from the beacon or probe response. This seems to afflict mobile 5297 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5298 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5299 */ 5300 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5301 ((assoc_data->wmm && !elems->wmm_param) || 5302 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5303 (!elems->ht_cap_elem || !elems->ht_operation)) || 5304 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5305 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5306 const struct cfg80211_bss_ies *ies; 5307 struct ieee802_11_elems *bss_elems; 5308 5309 rcu_read_lock(); 5310 ies = rcu_dereference(cbss->ies); 5311 if (ies) 5312 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5313 GFP_ATOMIC); 5314 rcu_read_unlock(); 5315 if (!bss_ies) { 5316 ret = false; 5317 goto out; 5318 } 5319 5320 parse_params.start = bss_ies->data; 5321 parse_params.len = bss_ies->len; 5322 parse_params.bss = cbss; 5323 parse_params.link_id = -1; 5324 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5325 if (!bss_elems) { 5326 ret = false; 5327 goto out; 5328 } 5329 5330 if (assoc_data->wmm && 5331 !elems->wmm_param && bss_elems->wmm_param) { 5332 elems->wmm_param = bss_elems->wmm_param; 5333 sdata_info(sdata, 5334 "AP bug: WMM param missing from AssocResp\n"); 5335 } 5336 5337 /* 5338 * Also check if we requested HT/VHT, otherwise the AP doesn't 5339 * have to include the IEs in the (re)association response. 5340 */ 5341 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5342 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5343 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5344 sdata_info(sdata, 5345 "AP bug: HT capability missing from AssocResp\n"); 5346 } 5347 if (!elems->ht_operation && bss_elems->ht_operation && 5348 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5349 elems->ht_operation = bss_elems->ht_operation; 5350 sdata_info(sdata, 5351 "AP bug: HT operation missing from AssocResp\n"); 5352 } 5353 5354 if (is_5ghz) { 5355 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5356 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5357 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5358 sdata_info(sdata, 5359 "AP bug: VHT capa missing from AssocResp\n"); 5360 } 5361 5362 if (!elems->vht_operation && bss_elems->vht_operation && 5363 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5364 elems->vht_operation = bss_elems->vht_operation; 5365 sdata_info(sdata, 5366 "AP bug: VHT operation missing from AssocResp\n"); 5367 } 5368 } 5369 kfree(bss_elems); 5370 } 5371 5372 /* 5373 * We previously checked these in the beacon/probe response, so 5374 * they should be present here. This is just a safety net. 5375 * Note that the ieee80211_config_bw() below would also check 5376 * for this (and more), but this has better error reporting. 5377 */ 5378 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5379 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5380 sdata_info(sdata, 5381 "HT AP is missing WMM params or HT capability/operation\n"); 5382 ret = false; 5383 goto out; 5384 } 5385 5386 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5387 (!elems->vht_cap_elem || !elems->vht_operation)) { 5388 sdata_info(sdata, 5389 "VHT AP is missing VHT capability/operation\n"); 5390 ret = false; 5391 goto out; 5392 } 5393 5394 /* check/update if AP changed anything in assoc response vs. scan */ 5395 if (ieee80211_config_bw(link, elems, 5396 link_id == assoc_data->assoc_link_id, 5397 changed, 5398 le16_to_cpu(mgmt->frame_control) & 5399 IEEE80211_FCTL_STYPE)) { 5400 ret = false; 5401 goto out; 5402 } 5403 5404 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5405 ret = false; 5406 goto out; 5407 } 5408 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5409 5410 /* Set up internal HT/VHT capabilities */ 5411 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5412 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5413 elems->ht_cap_elem, 5414 link_sta); 5415 5416 if (elems->vht_cap_elem && 5417 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5418 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5419 const struct cfg80211_bss_ies *ies; 5420 5421 /* 5422 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5423 * too large maximum MPDU length in the association response 5424 * (indicating 12k) that it cannot actually process ... 5425 * Work around that. 5426 */ 5427 rcu_read_lock(); 5428 ies = rcu_dereference(cbss->ies); 5429 if (ies) { 5430 const struct element *elem; 5431 5432 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5433 ies->data, ies->len); 5434 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5435 bss_vht_cap = (const void *)elem->data; 5436 } 5437 5438 if (ieee80211_hw_check(&local->hw, STRICT) && 5439 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5440 sizeof(*bss_vht_cap)))) { 5441 rcu_read_unlock(); 5442 ret = false; 5443 link_info(link, "VHT capabilities mismatch\n"); 5444 goto out; 5445 } 5446 5447 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5448 elems->vht_cap_elem, 5449 bss_vht_cap, link_sta); 5450 rcu_read_unlock(); 5451 } 5452 5453 if (elems->he_operation && 5454 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5455 elems->he_cap) { 5456 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5457 elems->he_cap, 5458 elems->he_cap_len, 5459 elems->he_6ghz_capa, 5460 link_sta); 5461 5462 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5463 if (elems->rsnx && elems->rsnx_len && 5464 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5465 wiphy_ext_feature_isset(local->hw.wiphy, 5466 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5467 bss_conf->twt_protected = true; 5468 else 5469 bss_conf->twt_protected = false; 5470 5471 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5472 link_sta, elems); 5473 5474 if (elems->eht_operation && elems->eht_cap && 5475 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5476 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5477 elems->he_cap, 5478 elems->he_cap_len, 5479 elems->eht_cap, 5480 elems->eht_cap_len, 5481 link_sta); 5482 5483 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5484 bss_conf->epcs_support = bss_conf->eht_support && 5485 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5486 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5487 5488 /* EPCS might be already enabled but a new added link 5489 * does not support EPCS. This should not really happen 5490 * in practice. 5491 */ 5492 if (sdata->u.mgd.epcs.enabled && 5493 !bss_conf->epcs_support) 5494 ieee80211_epcs_teardown(sdata); 5495 } else { 5496 bss_conf->eht_support = false; 5497 bss_conf->epcs_support = false; 5498 } 5499 } else { 5500 bss_conf->he_support = false; 5501 bss_conf->twt_requester = false; 5502 bss_conf->twt_protected = false; 5503 bss_conf->eht_support = false; 5504 bss_conf->epcs_support = false; 5505 } 5506 5507 if (elems->s1g_oper && 5508 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5509 elems->s1g_capab) 5510 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5511 link_sta); 5512 5513 bss_conf->twt_broadcast = 5514 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5515 5516 if (bss_conf->he_support) { 5517 bss_conf->he_bss_color.color = 5518 le32_get_bits(elems->he_operation->he_oper_params, 5519 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5520 bss_conf->he_bss_color.partial = 5521 le32_get_bits(elems->he_operation->he_oper_params, 5522 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5523 bss_conf->he_bss_color.enabled = 5524 !le32_get_bits(elems->he_operation->he_oper_params, 5525 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5526 5527 if (bss_conf->he_bss_color.enabled) 5528 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5529 5530 bss_conf->htc_trig_based_pkt_ext = 5531 le32_get_bits(elems->he_operation->he_oper_params, 5532 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5533 bss_conf->frame_time_rts_th = 5534 le32_get_bits(elems->he_operation->he_oper_params, 5535 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5536 5537 bss_conf->uora_exists = !!elems->uora_element; 5538 if (elems->uora_element) 5539 bss_conf->uora_ocw_range = elems->uora_element[0]; 5540 5541 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5542 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5543 /* TODO: OPEN: what happens if BSS color disable is set? */ 5544 } 5545 5546 if (cbss->transmitted_bss) { 5547 bss_conf->nontransmitted = true; 5548 ether_addr_copy(bss_conf->transmitter_bssid, 5549 cbss->transmitted_bss->bssid); 5550 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5551 bss_conf->bssid_index = cbss->bssid_index; 5552 } 5553 5554 /* 5555 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5556 * in their association response, so ignore that data for our own 5557 * configuration. If it changed since the last beacon, we'll get the 5558 * next beacon and update then. 5559 */ 5560 5561 /* 5562 * If an operating mode notification IE is present, override the 5563 * NSS calculation (that would be done in rate_control_rate_init()) 5564 * and use the # of streams from that element. 5565 */ 5566 if (elems->opmode_notif && 5567 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5568 u8 nss; 5569 5570 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5571 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5572 nss += 1; 5573 link_sta->pub->rx_nss = nss; 5574 } 5575 5576 /* 5577 * Always handle WMM once after association regardless 5578 * of the first value the AP uses. Setting -1 here has 5579 * that effect because the AP values is an unsigned 5580 * 4-bit value. 5581 */ 5582 link->u.mgd.wmm_last_param_set = -1; 5583 link->u.mgd.mu_edca_last_param_set = -1; 5584 5585 if (link->u.mgd.disable_wmm_tracking) { 5586 ieee80211_set_wmm_default(link, false, false); 5587 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5588 elems->wmm_param_len, 5589 elems->mu_edca_param_set)) { 5590 /* still enable QoS since we might have HT/VHT */ 5591 ieee80211_set_wmm_default(link, false, true); 5592 /* disable WMM tracking in this case to disable 5593 * tracking WMM parameter changes in the beacon if 5594 * the parameters weren't actually valid. Doing so 5595 * avoids changing parameters very strangely when 5596 * the AP is going back and forth between valid and 5597 * invalid parameters. 5598 */ 5599 link->u.mgd.disable_wmm_tracking = true; 5600 } 5601 5602 if (elems->max_idle_period_ie) { 5603 bss_conf->max_idle_period = 5604 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5605 bss_conf->protected_keep_alive = 5606 !!(elems->max_idle_period_ie->idle_options & 5607 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5608 *changed |= BSS_CHANGED_KEEP_ALIVE; 5609 } else { 5610 bss_conf->max_idle_period = 0; 5611 bss_conf->protected_keep_alive = false; 5612 } 5613 5614 /* set assoc capability (AID was already set earlier), 5615 * ieee80211_set_associated() will tell the driver */ 5616 bss_conf->assoc_capability = capab_info; 5617 5618 ret = true; 5619 out: 5620 kfree(elems); 5621 kfree(bss_ies); 5622 return ret; 5623 } 5624 5625 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5626 struct sta_info *sta, 5627 struct link_sta_info *link_sta, 5628 struct cfg80211_bss *cbss) 5629 { 5630 struct ieee80211_sub_if_data *sdata = link->sdata; 5631 struct ieee80211_local *local = sdata->local; 5632 struct ieee80211_bss *bss = (void *)cbss->priv; 5633 u32 rates = 0, basic_rates = 0; 5634 bool have_higher_than_11mbit = false; 5635 int min_rate = INT_MAX, min_rate_index = -1; 5636 struct ieee80211_supported_band *sband; 5637 5638 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5639 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5640 5641 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5642 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5643 ieee80211_s1g_sta_rate_init(sta); 5644 return 0; 5645 } 5646 5647 sband = local->hw.wiphy->bands[cbss->channel->band]; 5648 5649 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5650 NULL, 0, 5651 &rates, &basic_rates, NULL, 5652 &have_higher_than_11mbit, 5653 &min_rate, &min_rate_index); 5654 5655 /* 5656 * This used to be a workaround for basic rates missing 5657 * in the association response frame. Now that we no 5658 * longer use the basic rates from there, it probably 5659 * doesn't happen any more, but keep the workaround so 5660 * in case some *other* APs are buggy in different ways 5661 * we can connect -- with a warning. 5662 * Allow this workaround only in case the AP provided at least 5663 * one rate. 5664 */ 5665 if (min_rate_index < 0) { 5666 link_info(link, "No legacy rates in association response\n"); 5667 return -EINVAL; 5668 } else if (!basic_rates) { 5669 link_info(link, "No basic rates, using min rate instead\n"); 5670 basic_rates = BIT(min_rate_index); 5671 } 5672 5673 if (rates) 5674 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5675 else 5676 link_info(link, "No rates found, keeping mandatory only\n"); 5677 5678 link->conf->basic_rates = basic_rates; 5679 5680 /* cf. IEEE 802.11 9.2.12 */ 5681 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5682 have_higher_than_11mbit; 5683 5684 return 0; 5685 } 5686 5687 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5688 struct cfg80211_bss *cbss) 5689 { 5690 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5691 const struct element *ht_cap_elem, *vht_cap_elem; 5692 const struct cfg80211_bss_ies *ies; 5693 const struct ieee80211_ht_cap *ht_cap; 5694 const struct ieee80211_vht_cap *vht_cap; 5695 const struct ieee80211_he_cap_elem *he_cap; 5696 const struct element *he_cap_elem; 5697 u16 mcs_80_map, mcs_160_map; 5698 int i, mcs_nss_size; 5699 bool support_160; 5700 u8 chains = 1; 5701 5702 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5703 return chains; 5704 5705 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5706 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5707 ht_cap = (void *)ht_cap_elem->data; 5708 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5709 /* 5710 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5711 * "Tx Unequal Modulation Supported" fields. 5712 */ 5713 } 5714 5715 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5716 return chains; 5717 5718 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5719 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5720 u8 nss; 5721 u16 tx_mcs_map; 5722 5723 vht_cap = (void *)vht_cap_elem->data; 5724 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5725 for (nss = 8; nss > 0; nss--) { 5726 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5727 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5728 break; 5729 } 5730 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5731 chains = max(chains, nss); 5732 } 5733 5734 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5735 return chains; 5736 5737 ies = rcu_dereference(cbss->ies); 5738 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5739 ies->data, ies->len); 5740 5741 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5742 return chains; 5743 5744 /* skip one byte ext_tag_id */ 5745 he_cap = (void *)(he_cap_elem->data + 1); 5746 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5747 5748 /* invalid HE IE */ 5749 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5750 return chains; 5751 5752 /* mcs_nss is right after he_cap info */ 5753 he_mcs_nss_supp = (void *)(he_cap + 1); 5754 5755 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5756 5757 for (i = 7; i >= 0; i--) { 5758 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5759 5760 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5761 chains = max_t(u8, chains, i + 1); 5762 break; 5763 } 5764 } 5765 5766 support_160 = he_cap->phy_cap_info[0] & 5767 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5768 5769 if (!support_160) 5770 return chains; 5771 5772 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5773 for (i = 7; i >= 0; i--) { 5774 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5775 5776 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5777 chains = max_t(u8, chains, i + 1); 5778 break; 5779 } 5780 } 5781 5782 return chains; 5783 } 5784 5785 static void 5786 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5787 struct ieee80211_supported_band *sband, 5788 struct cfg80211_assoc_request *req, 5789 bool wmm_used, int link_id, 5790 struct ieee80211_conn_settings *conn) 5791 { 5792 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5793 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5794 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5795 const struct ieee80211_sta_he_cap *he_cap; 5796 const struct ieee80211_sta_eht_cap *eht_cap; 5797 struct ieee80211_sta_vht_cap vht_cap; 5798 5799 if (sband->band == NL80211_BAND_S1GHZ) { 5800 conn->mode = IEEE80211_CONN_MODE_S1G; 5801 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5802 mlme_dbg(sdata, "operating as S1G STA\n"); 5803 return; 5804 } 5805 5806 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5807 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5808 5809 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5810 5811 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5812 mlme_link_id_dbg(sdata, link_id, 5813 "HT disabled by flag, limiting to legacy\n"); 5814 goto out; 5815 } 5816 5817 if (!wmm_used) { 5818 mlme_link_id_dbg(sdata, link_id, 5819 "WMM/QoS not supported, limiting to legacy\n"); 5820 goto out; 5821 } 5822 5823 if (req) { 5824 unsigned int i; 5825 5826 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5827 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5828 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5829 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5830 netdev_info(sdata->dev, 5831 "WEP/TKIP use, limiting to legacy\n"); 5832 goto out; 5833 } 5834 } 5835 } 5836 5837 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5838 mlme_link_id_dbg(sdata, link_id, 5839 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5840 goto out; 5841 } 5842 5843 /* HT is fine */ 5844 conn->mode = IEEE80211_CONN_MODE_HT; 5845 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5846 IEEE80211_CONN_BW_LIMIT_40 : 5847 IEEE80211_CONN_BW_LIMIT_20; 5848 5849 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5850 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5851 5852 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5853 mlme_link_id_dbg(sdata, link_id, 5854 "VHT disabled by flag, limiting to HT\n"); 5855 goto out; 5856 } 5857 5858 if (vht_cap.vht_supported && is_5ghz) { 5859 bool have_80mhz = false; 5860 unsigned int i; 5861 5862 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5863 mlme_link_id_dbg(sdata, link_id, 5864 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5865 goto out; 5866 } 5867 5868 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5869 for (i = 0; i < sband->n_channels; i++) { 5870 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5871 IEEE80211_CHAN_NO_80MHZ)) 5872 continue; 5873 5874 have_80mhz = true; 5875 break; 5876 } 5877 5878 if (!have_80mhz) { 5879 mlme_link_id_dbg(sdata, link_id, 5880 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5881 goto out; 5882 } 5883 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5884 mlme_link_id_dbg(sdata, link_id, 5885 "no VHT support on 5 GHz, limiting to HT\n"); 5886 goto out; 5887 } 5888 5889 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5890 if (sband->band != NL80211_BAND_2GHZ) { 5891 conn->mode = IEEE80211_CONN_MODE_VHT; 5892 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5893 } 5894 5895 if (is_5ghz && 5896 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5897 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5898 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5899 mlme_link_id_dbg(sdata, link_id, 5900 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5901 } 5902 5903 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5904 mlme_link_id_dbg(sdata, link_id, 5905 "HE disabled by flag, limiting to HT/VHT\n"); 5906 goto out; 5907 } 5908 5909 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5910 if (!he_cap) { 5911 WARN_ON(is_6ghz); 5912 mlme_link_id_dbg(sdata, link_id, 5913 "no HE support, limiting to HT/VHT\n"); 5914 goto out; 5915 } 5916 5917 /* so we have HE */ 5918 conn->mode = IEEE80211_CONN_MODE_HE; 5919 5920 /* check bandwidth */ 5921 switch (sband->band) { 5922 default: 5923 case NL80211_BAND_2GHZ: 5924 if (he_cap->he_cap_elem.phy_cap_info[0] & 5925 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5926 break; 5927 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5928 mlme_link_id_dbg(sdata, link_id, 5929 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5930 break; 5931 case NL80211_BAND_5GHZ: 5932 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5933 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5934 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5935 mlme_link_id_dbg(sdata, link_id, 5936 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5937 break; 5938 } 5939 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5940 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5941 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5942 conn->bw_limit, 5943 IEEE80211_CONN_BW_LIMIT_80); 5944 mlme_link_id_dbg(sdata, link_id, 5945 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5946 } 5947 break; 5948 case NL80211_BAND_6GHZ: 5949 if (he_cap->he_cap_elem.phy_cap_info[0] & 5950 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5951 break; 5952 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5953 conn->bw_limit, 5954 IEEE80211_CONN_BW_LIMIT_80); 5955 mlme_link_id_dbg(sdata, link_id, 5956 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5957 break; 5958 } 5959 5960 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5961 mlme_link_id_dbg(sdata, link_id, 5962 "EHT disabled by flag, limiting to HE\n"); 5963 goto out; 5964 } 5965 5966 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5967 if (!eht_cap) { 5968 mlme_link_id_dbg(sdata, link_id, 5969 "no EHT support, limiting to HE\n"); 5970 goto out; 5971 } 5972 5973 /* we have EHT */ 5974 5975 conn->mode = IEEE80211_CONN_MODE_EHT; 5976 5977 /* check bandwidth */ 5978 if (is_6ghz && 5979 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5980 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5981 else if (is_6ghz) 5982 mlme_link_id_dbg(sdata, link_id, 5983 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5984 5985 out: 5986 mlme_link_id_dbg(sdata, link_id, 5987 "determined local STA to be %s, BW limited to %d MHz\n", 5988 ieee80211_conn_mode_str(conn->mode), 5989 20 * (1 << conn->bw_limit)); 5990 } 5991 5992 static void 5993 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5994 struct ieee80211_supported_band *sband, 5995 struct cfg80211_auth_request *req, 5996 bool wmm_used, 5997 struct ieee80211_conn_settings *conn) 5998 { 5999 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6000 req->link_id > 0 ? req->link_id : 0, 6001 conn); 6002 } 6003 6004 static void 6005 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6006 struct ieee80211_supported_band *sband, 6007 struct cfg80211_assoc_request *req, 6008 bool wmm_used, int link_id, 6009 struct ieee80211_conn_settings *conn) 6010 { 6011 struct ieee80211_conn_settings tmp; 6012 6013 WARN_ON(!req); 6014 6015 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6016 &tmp); 6017 6018 conn->mode = min_t(enum ieee80211_conn_mode, 6019 conn->mode, tmp.mode); 6020 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6021 conn->bw_limit, tmp.bw_limit); 6022 } 6023 6024 static enum ieee80211_ap_reg_power 6025 ieee80211_ap_power_type(u8 control) 6026 { 6027 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 6028 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 6029 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 6030 return IEEE80211_REG_LPI_AP; 6031 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 6032 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 6033 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD: 6034 return IEEE80211_REG_SP_AP; 6035 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 6036 return IEEE80211_REG_VLP_AP; 6037 default: 6038 return IEEE80211_REG_UNSET_AP; 6039 } 6040 } 6041 6042 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6043 struct ieee80211_link_data *link, 6044 int link_id, 6045 struct cfg80211_bss *cbss, bool mlo, 6046 struct ieee80211_conn_settings *conn, 6047 unsigned long *userspace_selectors) 6048 { 6049 struct ieee80211_local *local = sdata->local; 6050 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6051 struct ieee80211_chan_req chanreq = {}; 6052 struct cfg80211_chan_def ap_chandef; 6053 struct ieee802_11_elems *elems; 6054 int ret; 6055 6056 lockdep_assert_wiphy(local->hw.wiphy); 6057 6058 rcu_read_lock(); 6059 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6060 &chanreq, &ap_chandef, 6061 userspace_selectors); 6062 6063 if (IS_ERR(elems)) { 6064 rcu_read_unlock(); 6065 return PTR_ERR(elems); 6066 } 6067 6068 if (mlo && !elems->ml_basic) { 6069 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6070 rcu_read_unlock(); 6071 kfree(elems); 6072 return -EINVAL; 6073 } 6074 6075 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6076 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6077 6078 if (elems->pwr_constr_elem) 6079 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6080 6081 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6082 if (he_6ghz_oper) 6083 link->conf->power_type = 6084 ieee80211_ap_power_type(he_6ghz_oper->control); 6085 else 6086 link_info(link, 6087 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6088 cbss->channel->center_freq); 6089 6090 link->conf->tpe = elems->tpe; 6091 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6092 &chanreq.oper); 6093 } 6094 rcu_read_unlock(); 6095 /* the element data was RCU protected so no longer valid anyway */ 6096 kfree(elems); 6097 elems = NULL; 6098 6099 if (!link) 6100 return 0; 6101 6102 rcu_read_lock(); 6103 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6104 local->rx_chains); 6105 rcu_read_unlock(); 6106 6107 /* 6108 * If this fails (possibly due to channel context sharing 6109 * on incompatible channels, e.g. 80+80 and 160 sharing the 6110 * same control channel) try to use a smaller bandwidth. 6111 */ 6112 ret = ieee80211_link_use_channel(link, &chanreq, 6113 IEEE80211_CHANCTX_SHARED); 6114 6115 /* don't downgrade for 5 and 10 MHz channels, though. */ 6116 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6117 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6118 return ret; 6119 6120 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6121 ieee80211_chanreq_downgrade(&chanreq, conn); 6122 6123 ret = ieee80211_link_use_channel(link, &chanreq, 6124 IEEE80211_CHANCTX_SHARED); 6125 } 6126 6127 return ret; 6128 } 6129 6130 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6131 u8 *dtim_count, u8 *dtim_period) 6132 { 6133 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6134 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6135 ies->len); 6136 const struct ieee80211_tim_ie *tim = NULL; 6137 const struct ieee80211_bssid_index *idx; 6138 bool valid = tim_ie && tim_ie[1] >= 2; 6139 6140 if (valid) 6141 tim = (void *)(tim_ie + 2); 6142 6143 if (dtim_count) 6144 *dtim_count = valid ? tim->dtim_count : 0; 6145 6146 if (dtim_period) 6147 *dtim_period = valid ? tim->dtim_period : 0; 6148 6149 /* Check if value is overridden by non-transmitted profile */ 6150 if (!idx_ie || idx_ie[1] < 3) 6151 return valid; 6152 6153 idx = (void *)(idx_ie + 2); 6154 6155 if (dtim_count) 6156 *dtim_count = idx->dtim_count; 6157 6158 if (dtim_period) 6159 *dtim_period = idx->dtim_period; 6160 6161 return true; 6162 } 6163 6164 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6165 struct ieee80211_mgmt *mgmt, 6166 struct ieee802_11_elems *elems, 6167 const u8 *elem_start, unsigned int elem_len) 6168 { 6169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6170 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6171 struct ieee80211_local *local = sdata->local; 6172 unsigned int link_id; 6173 struct sta_info *sta; 6174 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6175 u16 valid_links = 0, dormant_links = 0; 6176 int err; 6177 6178 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6179 /* 6180 * station info was already allocated and inserted before 6181 * the association and should be available to us 6182 */ 6183 sta = sta_info_get(sdata, assoc_data->ap_addr); 6184 if (WARN_ON(!sta)) 6185 goto out_err; 6186 6187 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6188 6189 if (ieee80211_vif_is_mld(&sdata->vif)) { 6190 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6191 if (!assoc_data->link[link_id].bss) 6192 continue; 6193 6194 valid_links |= BIT(link_id); 6195 if (assoc_data->link[link_id].disabled) 6196 dormant_links |= BIT(link_id); 6197 6198 if (link_id != assoc_data->assoc_link_id) { 6199 err = ieee80211_sta_allocate_link(sta, link_id); 6200 if (err) 6201 goto out_err; 6202 } 6203 } 6204 6205 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6206 } 6207 6208 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6209 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6210 struct ieee80211_link_data *link; 6211 struct link_sta_info *link_sta; 6212 6213 if (!cbss) 6214 continue; 6215 6216 link = sdata_dereference(sdata->link[link_id], sdata); 6217 if (WARN_ON(!link)) 6218 goto out_err; 6219 6220 if (ieee80211_vif_is_mld(&sdata->vif)) 6221 link_info(link, 6222 "local address %pM, AP link address %pM%s\n", 6223 link->conf->addr, 6224 assoc_data->link[link_id].bss->bssid, 6225 link_id == assoc_data->assoc_link_id ? 6226 " (assoc)" : ""); 6227 6228 link_sta = rcu_dereference_protected(sta->link[link_id], 6229 lockdep_is_held(&local->hw.wiphy->mtx)); 6230 if (WARN_ON(!link_sta)) 6231 goto out_err; 6232 6233 if (!link->u.mgd.have_beacon) { 6234 const struct cfg80211_bss_ies *ies; 6235 6236 rcu_read_lock(); 6237 ies = rcu_dereference(cbss->beacon_ies); 6238 if (ies) 6239 link->u.mgd.have_beacon = true; 6240 else 6241 ies = rcu_dereference(cbss->ies); 6242 ieee80211_get_dtim(ies, 6243 &link->conf->sync_dtim_count, 6244 &link->u.mgd.dtim_period); 6245 link->conf->beacon_int = cbss->beacon_interval; 6246 rcu_read_unlock(); 6247 } 6248 6249 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6250 6251 if (link_id != assoc_data->assoc_link_id) { 6252 link->u.mgd.conn = assoc_data->link[link_id].conn; 6253 6254 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6255 true, &link->u.mgd.conn, 6256 sdata->u.mgd.userspace_selectors); 6257 if (err) { 6258 link_info(link, "prep_channel failed\n"); 6259 goto out_err; 6260 } 6261 } 6262 6263 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6264 assoc_data->link[link_id].bss); 6265 if (err) 6266 goto out_err; 6267 6268 if (!ieee80211_assoc_config_link(link, link_sta, 6269 assoc_data->link[link_id].bss, 6270 mgmt, elem_start, elem_len, 6271 &changed[link_id])) 6272 goto out_err; 6273 6274 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6275 valid_links &= ~BIT(link_id); 6276 ieee80211_sta_remove_link(sta, link_id); 6277 continue; 6278 } 6279 6280 if (link_id != assoc_data->assoc_link_id) { 6281 err = ieee80211_sta_activate_link(sta, link_id); 6282 if (err) 6283 goto out_err; 6284 } 6285 } 6286 6287 /* links might have changed due to rejected ones, set them again */ 6288 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6289 6290 rate_control_rate_init_all_links(sta); 6291 6292 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6293 set_sta_flag(sta, WLAN_STA_MFP); 6294 sta->sta.mfp = true; 6295 } else { 6296 sta->sta.mfp = false; 6297 } 6298 6299 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6300 elems->ext_capab_len); 6301 6302 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6303 local->hw.queues >= IEEE80211_NUM_ACS; 6304 6305 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6306 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6307 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6308 if (err) { 6309 sdata_info(sdata, 6310 "failed to move station %pM to desired state\n", 6311 sta->sta.addr); 6312 WARN_ON(__sta_info_destroy(sta)); 6313 goto out_err; 6314 } 6315 6316 if (sdata->wdev.use_4addr) 6317 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6318 6319 ieee80211_set_associated(sdata, assoc_data, changed); 6320 6321 /* 6322 * If we're using 4-addr mode, let the AP know that we're 6323 * doing so, so that it can create the STA VLAN on its side 6324 */ 6325 if (ifmgd->use_4addr) 6326 ieee80211_send_4addr_nullfunc(local, sdata); 6327 6328 /* 6329 * Start timer to probe the connection to the AP now. 6330 * Also start the timer that will detect beacon loss. 6331 */ 6332 ieee80211_sta_reset_beacon_monitor(sdata); 6333 ieee80211_sta_reset_conn_monitor(sdata); 6334 6335 return true; 6336 out_err: 6337 eth_zero_addr(sdata->vif.cfg.ap_addr); 6338 return false; 6339 } 6340 6341 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6342 struct ieee80211_mgmt *mgmt, 6343 size_t len) 6344 { 6345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6346 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6347 u16 capab_info, status_code, aid; 6348 struct ieee80211_elems_parse_params parse_params = { 6349 .bss = NULL, 6350 .link_id = -1, 6351 .from_ap = true, 6352 }; 6353 struct ieee802_11_elems *elems; 6354 int ac; 6355 const u8 *elem_start; 6356 unsigned int elem_len; 6357 bool reassoc; 6358 struct ieee80211_event event = { 6359 .type = MLME_EVENT, 6360 .u.mlme.data = ASSOC_EVENT, 6361 }; 6362 struct ieee80211_prep_tx_info info = {}; 6363 struct cfg80211_rx_assoc_resp_data resp = { 6364 .uapsd_queues = -1, 6365 }; 6366 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6367 unsigned int link_id; 6368 u16 max_aid = IEEE80211_MAX_AID; 6369 6370 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6371 6372 if (!assoc_data) 6373 return; 6374 6375 info.link_id = assoc_data->assoc_link_id; 6376 6377 parse_params.mode = 6378 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6379 6380 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6381 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6382 return; 6383 6384 /* 6385 * AssocResp and ReassocResp have identical structure, so process both 6386 * of them in this function. 6387 */ 6388 6389 if (len < 24 + 6) 6390 return; 6391 6392 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6393 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6394 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6395 if (assoc_data->s1g) { 6396 elem_start = mgmt->u.s1g_assoc_resp.variable; 6397 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6398 } else { 6399 elem_start = mgmt->u.assoc_resp.variable; 6400 } 6401 6402 /* 6403 * Note: this may not be perfect, AP might misbehave - if 6404 * anyone needs to rely on perfect complete notification 6405 * with the exact right subtype, then we need to track what 6406 * we actually transmitted. 6407 */ 6408 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6409 IEEE80211_STYPE_ASSOC_REQ; 6410 6411 if (assoc_data->fils_kek_len && 6412 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6413 return; 6414 6415 elem_len = len - (elem_start - (u8 *)mgmt); 6416 parse_params.start = elem_start; 6417 parse_params.len = elem_len; 6418 elems = ieee802_11_parse_elems_full(&parse_params); 6419 if (!elems) 6420 goto notify_driver; 6421 6422 if (elems->aid_resp) 6423 aid = le16_to_cpu(elems->aid_resp->aid); 6424 else 6425 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6426 6427 /* 6428 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6429 * an S1G STA the 3 MSBs are reserved. 6430 * (802.11-2016 9.4.1.8 AID field). 6431 */ 6432 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6433 6434 sdata_info(sdata, 6435 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6436 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6437 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6438 6439 ifmgd->broken_ap = false; 6440 6441 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6442 elems->timeout_int && 6443 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6444 u32 tu, ms; 6445 6446 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6447 le32_to_cpu(elems->timeout_int->value)); 6448 6449 tu = le32_to_cpu(elems->timeout_int->value); 6450 ms = tu * 1024 / 1000; 6451 sdata_info(sdata, 6452 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6453 assoc_data->ap_addr, tu, ms); 6454 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6455 assoc_data->timeout_started = true; 6456 assoc_data->comeback = true; 6457 if (ms > IEEE80211_ASSOC_TIMEOUT) 6458 run_again(sdata, assoc_data->timeout); 6459 goto notify_driver; 6460 } 6461 6462 if (status_code != WLAN_STATUS_SUCCESS) { 6463 sdata_info(sdata, "%pM denied association (code=%d)\n", 6464 assoc_data->ap_addr, status_code); 6465 event.u.mlme.status = MLME_DENIED; 6466 event.u.mlme.reason = status_code; 6467 drv_event_callback(sdata->local, sdata, &event); 6468 } else { 6469 if (aid == 0 || aid > max_aid) { 6470 sdata_info(sdata, 6471 "invalid AID value %d (out of range), turn off PS\n", 6472 aid); 6473 aid = 0; 6474 ifmgd->broken_ap = true; 6475 } 6476 6477 if (ieee80211_vif_is_mld(&sdata->vif)) { 6478 struct ieee80211_mle_basic_common_info *common; 6479 6480 if (!elems->ml_basic) { 6481 sdata_info(sdata, 6482 "MLO association with %pM but no (basic) multi-link element in response!\n", 6483 assoc_data->ap_addr); 6484 goto abandon_assoc; 6485 } 6486 6487 common = (void *)elems->ml_basic->variable; 6488 6489 if (memcmp(assoc_data->ap_addr, 6490 common->mld_mac_addr, ETH_ALEN)) { 6491 sdata_info(sdata, 6492 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6493 common->mld_mac_addr, 6494 assoc_data->ap_addr); 6495 goto abandon_assoc; 6496 } 6497 6498 sdata->vif.cfg.eml_cap = 6499 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6500 sdata->vif.cfg.eml_med_sync_delay = 6501 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6502 sdata->vif.cfg.mld_capa_op = 6503 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6504 } 6505 6506 sdata->vif.cfg.aid = aid; 6507 sdata->vif.cfg.s1g = assoc_data->s1g; 6508 6509 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6510 elem_start, elem_len)) { 6511 /* oops -- internal error -- send timeout for now */ 6512 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6513 goto notify_driver; 6514 } 6515 event.u.mlme.status = MLME_SUCCESS; 6516 drv_event_callback(sdata->local, sdata, &event); 6517 sdata_info(sdata, "associated\n"); 6518 6519 info.success = 1; 6520 } 6521 6522 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6523 struct ieee80211_link_data *link; 6524 6525 if (!assoc_data->link[link_id].bss) 6526 continue; 6527 6528 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6529 ether_addr_copy(resp.links[link_id].addr, 6530 assoc_data->link[link_id].addr); 6531 resp.links[link_id].status = assoc_data->link[link_id].status; 6532 6533 link = sdata_dereference(sdata->link[link_id], sdata); 6534 if (!link) 6535 continue; 6536 6537 /* get uapsd queues configuration - same for all links */ 6538 resp.uapsd_queues = 0; 6539 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6540 if (link->tx_conf[ac].uapsd) 6541 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6542 } 6543 6544 if (ieee80211_vif_is_mld(&sdata->vif)) { 6545 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6546 resp.ap_mld_addr = ap_mld_addr; 6547 } 6548 6549 ieee80211_destroy_assoc_data(sdata, 6550 status_code == WLAN_STATUS_SUCCESS ? 6551 ASSOC_SUCCESS : 6552 ASSOC_REJECTED); 6553 6554 resp.buf = (u8 *)mgmt; 6555 resp.len = len; 6556 resp.req_ies = ifmgd->assoc_req_ies; 6557 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6558 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6559 notify_driver: 6560 drv_mgd_complete_tx(sdata->local, sdata, &info); 6561 kfree(elems); 6562 return; 6563 abandon_assoc: 6564 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6565 goto notify_driver; 6566 } 6567 6568 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6569 struct ieee80211_mgmt *mgmt, size_t len, 6570 struct ieee80211_rx_status *rx_status) 6571 { 6572 struct ieee80211_sub_if_data *sdata = link->sdata; 6573 struct ieee80211_local *local = sdata->local; 6574 struct ieee80211_bss *bss; 6575 struct ieee80211_channel *channel; 6576 6577 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6578 6579 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6580 ieee80211_rx_status_to_khz(rx_status)); 6581 if (!channel) 6582 return; 6583 6584 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6585 if (bss) { 6586 link->conf->beacon_rate = bss->beacon_rate; 6587 ieee80211_rx_bss_put(local, bss); 6588 } 6589 } 6590 6591 6592 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6593 struct sk_buff *skb) 6594 { 6595 struct ieee80211_sub_if_data *sdata = link->sdata; 6596 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6597 struct ieee80211_if_managed *ifmgd; 6598 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6599 struct ieee80211_channel *channel; 6600 size_t baselen, len = skb->len; 6601 6602 ifmgd = &sdata->u.mgd; 6603 6604 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6605 6606 /* 6607 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6608 * "If a 6 GHz AP receives a Probe Request frame and responds with 6609 * a Probe Response frame [..], the Address 1 field of the Probe 6610 * Response frame shall be set to the broadcast address [..]" 6611 * So, on 6GHz band we should also accept broadcast responses. 6612 */ 6613 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6614 rx_status->freq); 6615 if (!channel) 6616 return; 6617 6618 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6619 (channel->band != NL80211_BAND_6GHZ || 6620 !is_broadcast_ether_addr(mgmt->da))) 6621 return; /* ignore ProbeResp to foreign address */ 6622 6623 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6624 if (baselen > len) 6625 return; 6626 6627 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6628 6629 if (ifmgd->associated && 6630 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6631 ieee80211_reset_ap_probe(sdata); 6632 } 6633 6634 /* 6635 * This is the canonical list of information elements we care about, 6636 * the filter code also gives us all changes to the Microsoft OUI 6637 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6638 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6639 * changes to requested client power. 6640 * 6641 * We implement beacon filtering in software since that means we can 6642 * avoid processing the frame here and in cfg80211, and userspace 6643 * will not be able to tell whether the hardware supports it or not. 6644 * 6645 * XXX: This list needs to be dynamic -- userspace needs to be able to 6646 * add items it requires. It also needs to be able to tell us to 6647 * look out for other vendor IEs. 6648 */ 6649 static const u64 care_about_ies = 6650 (1ULL << WLAN_EID_COUNTRY) | 6651 (1ULL << WLAN_EID_ERP_INFO) | 6652 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6653 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6654 (1ULL << WLAN_EID_HT_CAPABILITY) | 6655 (1ULL << WLAN_EID_HT_OPERATION) | 6656 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6657 6658 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6659 struct ieee80211_if_managed *ifmgd, 6660 struct ieee80211_bss_conf *bss_conf, 6661 struct ieee80211_local *local, 6662 struct ieee80211_rx_status *rx_status) 6663 { 6664 struct ieee80211_sub_if_data *sdata = link->sdata; 6665 6666 /* Track average RSSI from the Beacon frames of the current AP */ 6667 6668 if (!link->u.mgd.tracking_signal_avg) { 6669 link->u.mgd.tracking_signal_avg = true; 6670 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6671 link->u.mgd.last_cqm_event_signal = 0; 6672 link->u.mgd.count_beacon_signal = 1; 6673 link->u.mgd.last_ave_beacon_signal = 0; 6674 } else { 6675 link->u.mgd.count_beacon_signal++; 6676 } 6677 6678 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6679 -rx_status->signal); 6680 6681 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6682 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6683 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6684 int last_sig = link->u.mgd.last_ave_beacon_signal; 6685 struct ieee80211_event event = { 6686 .type = RSSI_EVENT, 6687 }; 6688 6689 /* 6690 * if signal crosses either of the boundaries, invoke callback 6691 * with appropriate parameters 6692 */ 6693 if (sig > ifmgd->rssi_max_thold && 6694 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6695 link->u.mgd.last_ave_beacon_signal = sig; 6696 event.u.rssi.data = RSSI_EVENT_HIGH; 6697 drv_event_callback(local, sdata, &event); 6698 } else if (sig < ifmgd->rssi_min_thold && 6699 (last_sig >= ifmgd->rssi_max_thold || 6700 last_sig == 0)) { 6701 link->u.mgd.last_ave_beacon_signal = sig; 6702 event.u.rssi.data = RSSI_EVENT_LOW; 6703 drv_event_callback(local, sdata, &event); 6704 } 6705 } 6706 6707 if (bss_conf->cqm_rssi_thold && 6708 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6709 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6710 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6711 int last_event = link->u.mgd.last_cqm_event_signal; 6712 int thold = bss_conf->cqm_rssi_thold; 6713 int hyst = bss_conf->cqm_rssi_hyst; 6714 6715 if (sig < thold && 6716 (last_event == 0 || sig < last_event - hyst)) { 6717 link->u.mgd.last_cqm_event_signal = sig; 6718 ieee80211_cqm_rssi_notify( 6719 &sdata->vif, 6720 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6721 sig, GFP_KERNEL); 6722 } else if (sig > thold && 6723 (last_event == 0 || sig > last_event + hyst)) { 6724 link->u.mgd.last_cqm_event_signal = sig; 6725 ieee80211_cqm_rssi_notify( 6726 &sdata->vif, 6727 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6728 sig, GFP_KERNEL); 6729 } 6730 } 6731 6732 if (bss_conf->cqm_rssi_low && 6733 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6734 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6735 int last_event = link->u.mgd.last_cqm_event_signal; 6736 int low = bss_conf->cqm_rssi_low; 6737 int high = bss_conf->cqm_rssi_high; 6738 6739 if (sig < low && 6740 (last_event == 0 || last_event >= low)) { 6741 link->u.mgd.last_cqm_event_signal = sig; 6742 ieee80211_cqm_rssi_notify( 6743 &sdata->vif, 6744 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6745 sig, GFP_KERNEL); 6746 } else if (sig > high && 6747 (last_event == 0 || last_event <= high)) { 6748 link->u.mgd.last_cqm_event_signal = sig; 6749 ieee80211_cqm_rssi_notify( 6750 &sdata->vif, 6751 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6752 sig, GFP_KERNEL); 6753 } 6754 } 6755 } 6756 6757 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6758 struct cfg80211_bss *bss) 6759 { 6760 if (ether_addr_equal(tx_bssid, bss->bssid)) 6761 return true; 6762 if (!bss->transmitted_bss) 6763 return false; 6764 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6765 } 6766 6767 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6768 struct wiphy_work *work) 6769 { 6770 struct ieee80211_sub_if_data *sdata = 6771 container_of(work, struct ieee80211_sub_if_data, 6772 u.mgd.ml_reconf_work.work); 6773 u16 new_valid_links, new_active_links, new_dormant_links; 6774 int ret; 6775 6776 if (!sdata->u.mgd.removed_links) 6777 return; 6778 6779 sdata_info(sdata, 6780 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6781 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6782 6783 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6784 if (new_valid_links == sdata->vif.valid_links) 6785 return; 6786 6787 if (!new_valid_links || 6788 !(new_valid_links & ~sdata->vif.dormant_links)) { 6789 sdata_info(sdata, "No valid links after reconfiguration\n"); 6790 ret = -EINVAL; 6791 goto out; 6792 } 6793 6794 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6795 if (new_active_links != sdata->vif.active_links) { 6796 if (!new_active_links) 6797 new_active_links = 6798 BIT(ffs(new_valid_links & 6799 ~sdata->vif.dormant_links) - 1); 6800 6801 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6802 if (ret) { 6803 sdata_info(sdata, 6804 "Failed setting active links\n"); 6805 goto out; 6806 } 6807 } 6808 6809 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6810 6811 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6812 new_dormant_links); 6813 if (ret) 6814 sdata_info(sdata, "Failed setting valid links\n"); 6815 6816 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6817 6818 out: 6819 if (!ret) 6820 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6821 else 6822 __ieee80211_disconnect(sdata); 6823 6824 sdata->u.mgd.removed_links = 0; 6825 } 6826 6827 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6828 struct ieee802_11_elems *elems) 6829 { 6830 const struct element *sub; 6831 unsigned long removed_links = 0; 6832 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6833 u8 link_id; 6834 u32 delay; 6835 6836 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6837 return; 6838 6839 /* Directly parse the sub elements as the common information doesn't 6840 * hold any useful information. 6841 */ 6842 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6843 elems->ml_reconf_len) { 6844 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6845 u8 *pos = prof->variable; 6846 u16 control; 6847 6848 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6849 continue; 6850 6851 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6852 sub->datalen)) 6853 return; 6854 6855 control = le16_to_cpu(prof->control); 6856 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6857 6858 removed_links |= BIT(link_id); 6859 6860 /* the MAC address should not be included, but handle it */ 6861 if (control & 6862 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6863 pos += 6; 6864 6865 /* According to Draft P802.11be_D3.0, the control should 6866 * include the AP Removal Timer present. If the AP Removal Timer 6867 * is not present assume immediate removal. 6868 */ 6869 if (control & 6870 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6871 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6872 } 6873 6874 removed_links &= sdata->vif.valid_links; 6875 if (!removed_links) { 6876 /* In case the removal was cancelled, abort it */ 6877 if (sdata->u.mgd.removed_links) { 6878 sdata->u.mgd.removed_links = 0; 6879 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6880 &sdata->u.mgd.ml_reconf_work); 6881 } 6882 return; 6883 } 6884 6885 delay = 0; 6886 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6887 struct ieee80211_bss_conf *link_conf = 6888 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6889 u32 link_delay; 6890 6891 if (!link_conf) { 6892 removed_links &= ~BIT(link_id); 6893 continue; 6894 } 6895 6896 if (link_removal_timeout[link_id] < 1) 6897 link_delay = 0; 6898 else 6899 link_delay = link_conf->beacon_int * 6900 (link_removal_timeout[link_id] - 1); 6901 6902 if (!delay) 6903 delay = link_delay; 6904 else 6905 delay = min(delay, link_delay); 6906 } 6907 6908 sdata->u.mgd.removed_links = removed_links; 6909 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6910 &sdata->u.mgd.ml_reconf_work, 6911 TU_TO_JIFFIES(delay)); 6912 } 6913 6914 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6915 u16 active_links, u16 dormant_links, 6916 u16 suspended_links) 6917 { 6918 u64 changed = 0; 6919 int ret; 6920 6921 if (!active_links) { 6922 ret = -EINVAL; 6923 goto out; 6924 } 6925 6926 /* If there is an active negotiated TTLM, it should be discarded by 6927 * the new negotiated/advertised TTLM. 6928 */ 6929 if (sdata->vif.neg_ttlm.valid) { 6930 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6931 sdata->vif.suspended_links = 0; 6932 changed = BSS_CHANGED_MLD_TTLM; 6933 } 6934 6935 if (sdata->vif.active_links != active_links) { 6936 /* usable links are affected when active_links are changed, 6937 * so notify the driver about the status change 6938 */ 6939 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6940 active_links &= sdata->vif.active_links; 6941 if (!active_links) 6942 active_links = 6943 BIT(__ffs(sdata->vif.valid_links & 6944 ~dormant_links)); 6945 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6946 if (ret) { 6947 sdata_info(sdata, "Failed to set TTLM active links\n"); 6948 goto out; 6949 } 6950 } 6951 6952 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6953 dormant_links); 6954 if (ret) { 6955 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6956 goto out; 6957 } 6958 6959 sdata->vif.suspended_links = suspended_links; 6960 if (sdata->vif.suspended_links) 6961 changed |= BSS_CHANGED_MLD_TTLM; 6962 6963 ieee80211_vif_cfg_change_notify(sdata, changed); 6964 6965 out: 6966 if (ret) 6967 ieee80211_disconnect(&sdata->vif, false); 6968 6969 return ret; 6970 } 6971 6972 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6973 struct wiphy_work *work) 6974 { 6975 u16 new_active_links, new_dormant_links; 6976 struct ieee80211_sub_if_data *sdata = 6977 container_of(work, struct ieee80211_sub_if_data, 6978 u.mgd.ttlm_work.work); 6979 6980 new_active_links = sdata->u.mgd.ttlm_info.map & 6981 sdata->vif.valid_links; 6982 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6983 sdata->vif.valid_links; 6984 6985 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6986 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6987 0)) 6988 return; 6989 6990 sdata->u.mgd.ttlm_info.active = true; 6991 sdata->u.mgd.ttlm_info.switch_time = 0; 6992 } 6993 6994 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6995 { 6996 if (bm_size == 1) 6997 return *data; 6998 else 6999 return get_unaligned_le16(data); 7000 } 7001 7002 static int 7003 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 7004 const struct ieee80211_ttlm_elem *ttlm, 7005 struct ieee80211_adv_ttlm_info *ttlm_info) 7006 { 7007 /* The element size was already validated in 7008 * ieee80211_tid_to_link_map_size_ok() 7009 */ 7010 u8 control, link_map_presence, map_size, tid; 7011 u8 *pos; 7012 7013 memset(ttlm_info, 0, sizeof(*ttlm_info)); 7014 pos = (void *)ttlm->optional; 7015 control = ttlm->control; 7016 7017 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 7018 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 7019 return 0; 7020 7021 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 7022 IEEE80211_TTLM_DIRECTION_BOTH) { 7023 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 7024 return -EINVAL; 7025 } 7026 7027 link_map_presence = *pos; 7028 pos++; 7029 7030 ttlm_info->switch_time = get_unaligned_le16(pos); 7031 7032 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 7033 * by 1. 7034 */ 7035 if (!ttlm_info->switch_time) 7036 ttlm_info->switch_time = 1; 7037 7038 pos += 2; 7039 7040 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 7041 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 7042 pos += 3; 7043 } 7044 7045 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7046 map_size = 1; 7047 else 7048 map_size = 2; 7049 7050 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 7051 * not advertise a TID-to-link mapping that does not map all TIDs to the 7052 * same link set, reject frame if not all links have mapping 7053 */ 7054 if (link_map_presence != 0xff) { 7055 sdata_info(sdata, 7056 "Invalid advertised T2L mapping presence indicator\n"); 7057 return -EINVAL; 7058 } 7059 7060 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7061 if (!ttlm_info->map) { 7062 sdata_info(sdata, 7063 "Invalid advertised T2L map for TID 0\n"); 7064 return -EINVAL; 7065 } 7066 7067 pos += map_size; 7068 7069 for (tid = 1; tid < 8; tid++) { 7070 u16 map = ieee80211_get_ttlm(map_size, pos); 7071 7072 if (map != ttlm_info->map) { 7073 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7074 tid); 7075 return -EINVAL; 7076 } 7077 7078 pos += map_size; 7079 } 7080 return 0; 7081 } 7082 7083 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7084 struct ieee802_11_elems *elems, 7085 u64 beacon_ts) 7086 { 7087 u8 i; 7088 int ret; 7089 7090 if (!ieee80211_vif_is_mld(&sdata->vif)) 7091 return; 7092 7093 if (!elems->ttlm_num) { 7094 if (sdata->u.mgd.ttlm_info.switch_time) { 7095 /* if a planned TID-to-link mapping was cancelled - 7096 * abort it 7097 */ 7098 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7099 &sdata->u.mgd.ttlm_work); 7100 } else if (sdata->u.mgd.ttlm_info.active) { 7101 /* if no TID-to-link element, set to default mapping in 7102 * which all TIDs are mapped to all setup links 7103 */ 7104 ret = ieee80211_vif_set_links(sdata, 7105 sdata->vif.valid_links, 7106 0); 7107 if (ret) { 7108 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7109 return; 7110 } 7111 ieee80211_vif_cfg_change_notify(sdata, 7112 BSS_CHANGED_MLD_VALID_LINKS); 7113 } 7114 memset(&sdata->u.mgd.ttlm_info, 0, 7115 sizeof(sdata->u.mgd.ttlm_info)); 7116 return; 7117 } 7118 7119 for (i = 0; i < elems->ttlm_num; i++) { 7120 struct ieee80211_adv_ttlm_info ttlm_info; 7121 u32 res; 7122 7123 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7124 &ttlm_info); 7125 7126 if (res) { 7127 __ieee80211_disconnect(sdata); 7128 return; 7129 } 7130 7131 if (ttlm_info.switch_time) { 7132 u16 beacon_ts_tu, st_tu, delay; 7133 u32 delay_jiffies; 7134 u64 mask; 7135 7136 /* The t2l map switch time is indicated with a partial 7137 * TSF value (bits 10 to 25), get the partial beacon TS 7138 * as well, and calc the delay to the start time. 7139 */ 7140 mask = GENMASK_ULL(25, 10); 7141 beacon_ts_tu = (beacon_ts & mask) >> 10; 7142 st_tu = ttlm_info.switch_time; 7143 delay = st_tu - beacon_ts_tu; 7144 7145 /* 7146 * If the switch time is far in the future, then it 7147 * could also be the previous switch still being 7148 * announced. 7149 * We can simply ignore it for now, if it is a future 7150 * switch the AP will continue to announce it anyway. 7151 */ 7152 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7153 return; 7154 7155 delay_jiffies = TU_TO_JIFFIES(delay); 7156 7157 /* Link switching can take time, so schedule it 7158 * 100ms before to be ready on time 7159 */ 7160 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7161 delay_jiffies -= 7162 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7163 else 7164 delay_jiffies = 0; 7165 7166 sdata->u.mgd.ttlm_info = ttlm_info; 7167 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7168 &sdata->u.mgd.ttlm_work); 7169 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7170 &sdata->u.mgd.ttlm_work, 7171 delay_jiffies); 7172 return; 7173 } 7174 } 7175 } 7176 7177 static void 7178 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7179 int reporting_link_id, 7180 struct ieee802_11_elems *elems) 7181 { 7182 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7183 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7184 const struct element *sub; 7185 const u8 *subelems; 7186 size_t subelems_len; 7187 u8 common_size; 7188 int link_id; 7189 7190 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7191 return; 7192 7193 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7194 subelems = (u8 *)elems->ml_basic + common_size; 7195 subelems_len = elems->ml_basic_len - common_size; 7196 7197 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7198 subelems, subelems_len) { 7199 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7200 struct ieee80211_link_data *link; 7201 ssize_t len; 7202 7203 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7204 sub->datalen)) 7205 continue; 7206 7207 link_id = le16_get_bits(prof->control, 7208 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7209 /* need a valid link ID, but also not our own, both AP bugs */ 7210 if (link_id == reporting_link_id || 7211 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7212 continue; 7213 7214 link = sdata_dereference(sdata->link[link_id], sdata); 7215 if (!link) 7216 continue; 7217 7218 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7219 NULL, 0, 7220 IEEE80211_MLE_SUBELEM_FRAGMENT); 7221 if (WARN_ON(len < 0)) 7222 continue; 7223 7224 sta_profiles[link_id] = sub; 7225 sta_profiles_len[link_id] = len; 7226 } 7227 7228 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7229 struct ieee80211_mle_per_sta_profile *prof; 7230 struct ieee802_11_elems *prof_elems; 7231 struct ieee80211_link_data *link; 7232 ssize_t len; 7233 7234 if (link_id == reporting_link_id) 7235 continue; 7236 7237 link = sdata_dereference(sdata->link[link_id], sdata); 7238 if (!link) 7239 continue; 7240 7241 if (!sta_profiles[link_id]) { 7242 prof_elems = NULL; 7243 goto handle; 7244 } 7245 7246 /* we can defragment in-place, won't use the buffer again */ 7247 len = cfg80211_defragment_element(sta_profiles[link_id], 7248 subelems, subelems_len, 7249 (void *)sta_profiles[link_id], 7250 sta_profiles_len[link_id], 7251 IEEE80211_MLE_SUBELEM_FRAGMENT); 7252 if (WARN_ON(len != sta_profiles_len[link_id])) 7253 continue; 7254 7255 prof = (void *)sta_profiles[link_id]; 7256 prof_elems = ieee802_11_parse_elems(prof->variable + 7257 (prof->sta_info_len - 1), 7258 len - 7259 (prof->sta_info_len - 1), 7260 false, NULL); 7261 7262 /* memory allocation failed - let's hope that's transient */ 7263 if (!prof_elems) 7264 continue; 7265 7266 handle: 7267 /* 7268 * FIXME: the timings here are obviously incorrect, 7269 * but only older Intel drivers seem to care, and 7270 * those don't have MLO. If you really need this, 7271 * the problem is having to calculate it with the 7272 * TSF offset etc. The device_timestamp is still 7273 * correct, of course. 7274 */ 7275 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7276 IEEE80211_CSA_SOURCE_OTHER_LINK); 7277 kfree(prof_elems); 7278 } 7279 } 7280 7281 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7282 const struct ieee802_11_elems *elems) 7283 { 7284 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7285 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7286 7287 if (!elems->ssid) 7288 return false; 7289 7290 /* hidden SSID: zero length */ 7291 if (elems->ssid_len == 0) 7292 return false; 7293 7294 if (elems->ssid_len != cfg->ssid_len) 7295 return true; 7296 7297 /* hidden SSID: zeroed out */ 7298 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7299 return false; 7300 7301 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7302 } 7303 7304 static bool 7305 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7306 struct ieee80211_mgmt *mgmt, 7307 struct ieee80211_rx_status *rx_status, 7308 struct ieee80211_chanctx_conf *chanctx) 7309 { 7310 u32 pri_2mhz_khz; 7311 struct ieee80211_channel *s1g_sibling_1mhz; 7312 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7313 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7314 7315 if (rx_khz == pri_khz) 7316 return true; 7317 7318 if (!chanctx->def.s1g_primary_2mhz) 7319 return false; 7320 7321 /* 7322 * If we have an S1G interface with a 2MHz primary, beacons are 7323 * sent on the center frequency of the 2MHz primary. Find the sibling 7324 * 1MHz channel and calculate the 2MHz primary center frequency. 7325 */ 7326 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7327 &chanctx->def); 7328 if (!s1g_sibling_1mhz) 7329 return false; 7330 7331 pri_2mhz_khz = 7332 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7333 return rx_khz == pri_2mhz_khz; 7334 } 7335 7336 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7337 struct ieee80211_hdr *hdr, size_t len, 7338 struct ieee80211_rx_status *rx_status) 7339 { 7340 struct ieee80211_sub_if_data *sdata = link->sdata; 7341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7342 struct ieee80211_bss_conf *bss_conf = link->conf; 7343 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7344 struct ieee80211_mgmt *mgmt = (void *) hdr; 7345 struct ieee80211_ext *ext = NULL; 7346 size_t baselen; 7347 struct ieee802_11_elems *elems; 7348 struct ieee80211_local *local = sdata->local; 7349 struct ieee80211_chanctx_conf *chanctx_conf; 7350 struct ieee80211_supported_band *sband; 7351 struct ieee80211_channel *chan; 7352 struct link_sta_info *link_sta; 7353 struct sta_info *sta; 7354 u64 changed = 0; 7355 bool erp_valid; 7356 u8 erp_value = 0; 7357 u32 ncrc = 0; 7358 u8 *bssid, *variable = mgmt->u.beacon.variable; 7359 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7360 struct ieee80211_elems_parse_params parse_params = { 7361 .mode = link->u.mgd.conn.mode, 7362 .link_id = -1, 7363 .from_ap = true, 7364 }; 7365 7366 lockdep_assert_wiphy(local->hw.wiphy); 7367 7368 /* Process beacon from the current BSS */ 7369 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7370 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7371 ext = (void *)mgmt; 7372 variable = ext->u.s1g_beacon.variable + 7373 ieee80211_s1g_optional_len(ext->frame_control); 7374 } 7375 7376 baselen = (u8 *) variable - (u8 *) mgmt; 7377 if (baselen > len) 7378 return; 7379 7380 parse_params.start = variable; 7381 parse_params.len = len - baselen; 7382 7383 rcu_read_lock(); 7384 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7385 if (!chanctx_conf) { 7386 rcu_read_unlock(); 7387 return; 7388 } 7389 7390 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7391 chanctx_conf)) { 7392 rcu_read_unlock(); 7393 return; 7394 } 7395 chan = chanctx_conf->def.chan; 7396 rcu_read_unlock(); 7397 7398 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7399 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7400 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7401 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7402 elems = ieee802_11_parse_elems_full(&parse_params); 7403 if (!elems) 7404 return; 7405 7406 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7407 7408 if (elems->dtim_period) 7409 link->u.mgd.dtim_period = elems->dtim_period; 7410 link->u.mgd.have_beacon = true; 7411 ifmgd->assoc_data->need_beacon = false; 7412 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7413 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7414 bss_conf->sync_tsf = 7415 le64_to_cpu(mgmt->u.beacon.timestamp); 7416 bss_conf->sync_device_ts = 7417 rx_status->device_timestamp; 7418 bss_conf->sync_dtim_count = elems->dtim_count; 7419 } 7420 7421 if (elems->mbssid_config_ie) 7422 bss_conf->profile_periodicity = 7423 elems->mbssid_config_ie->profile_periodicity; 7424 else 7425 bss_conf->profile_periodicity = 0; 7426 7427 if (elems->ext_capab_len >= 11 && 7428 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7429 bss_conf->ema_ap = true; 7430 else 7431 bss_conf->ema_ap = false; 7432 7433 /* continue assoc process */ 7434 ifmgd->assoc_data->timeout = jiffies; 7435 ifmgd->assoc_data->timeout_started = true; 7436 run_again(sdata, ifmgd->assoc_data->timeout); 7437 kfree(elems); 7438 return; 7439 } 7440 7441 if (!ifmgd->associated || 7442 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7443 return; 7444 bssid = link->u.mgd.bssid; 7445 7446 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7447 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7448 local, rx_status); 7449 7450 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7451 mlme_dbg_ratelimited(sdata, 7452 "cancelling AP probe due to a received beacon\n"); 7453 ieee80211_reset_ap_probe(sdata); 7454 } 7455 7456 /* 7457 * Push the beacon loss detection into the future since 7458 * we are processing a beacon from the AP just now. 7459 */ 7460 ieee80211_sta_reset_beacon_monitor(sdata); 7461 7462 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7463 * element (which carries the beacon interval). Don't forget to add a 7464 * bit to care_about_ies[] above if mac80211 is interested in a 7465 * changing S1G element. 7466 */ 7467 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7468 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7469 parse_params.bss = bss_conf->bss; 7470 parse_params.filter = care_about_ies; 7471 parse_params.crc = ncrc; 7472 elems = ieee802_11_parse_elems_full(&parse_params); 7473 if (!elems) 7474 return; 7475 7476 if (rx_status->flag & RX_FLAG_DECRYPTED && 7477 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7478 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7479 sdata->vif.cfg.ap_addr); 7480 __ieee80211_disconnect(sdata); 7481 return; 7482 } 7483 7484 ncrc = elems->crc; 7485 7486 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7487 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7488 vif_cfg->s1g)) { 7489 if (local->hw.conf.dynamic_ps_timeout > 0) { 7490 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7491 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7492 ieee80211_hw_config(local, -1, 7493 IEEE80211_CONF_CHANGE_PS); 7494 } 7495 ieee80211_send_nullfunc(local, sdata, false); 7496 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7497 local->pspolling = true; 7498 7499 /* 7500 * Here is assumed that the driver will be 7501 * able to send ps-poll frame and receive a 7502 * response even though power save mode is 7503 * enabled, but some drivers might require 7504 * to disable power save here. This needs 7505 * to be investigated. 7506 */ 7507 ieee80211_send_pspoll(local, sdata); 7508 } 7509 } 7510 7511 if (sdata->vif.p2p || 7512 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7513 struct ieee80211_p2p_noa_attr noa = {}; 7514 int ret; 7515 7516 ret = cfg80211_get_p2p_attr(variable, 7517 len - baselen, 7518 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7519 (u8 *) &noa, sizeof(noa)); 7520 if (ret >= 2) { 7521 if (link->u.mgd.p2p_noa_index != noa.index) { 7522 /* valid noa_attr and index changed */ 7523 link->u.mgd.p2p_noa_index = noa.index; 7524 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7525 changed |= BSS_CHANGED_P2P_PS; 7526 /* 7527 * make sure we update all information, the CRC 7528 * mechanism doesn't look at P2P attributes. 7529 */ 7530 link->u.mgd.beacon_crc_valid = false; 7531 } 7532 } else if (link->u.mgd.p2p_noa_index != -1) { 7533 /* noa_attr not found and we had valid noa_attr before */ 7534 link->u.mgd.p2p_noa_index = -1; 7535 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7536 changed |= BSS_CHANGED_P2P_PS; 7537 link->u.mgd.beacon_crc_valid = false; 7538 } 7539 } 7540 7541 /* 7542 * Update beacon timing and dtim count on every beacon appearance. This 7543 * will allow the driver to use the most updated values. Do it before 7544 * comparing this one with last received beacon. 7545 * IMPORTANT: These parameters would possibly be out of sync by the time 7546 * the driver will use them. The synchronized view is currently 7547 * guaranteed only in certain callbacks. 7548 */ 7549 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7550 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7551 bss_conf->sync_tsf = 7552 le64_to_cpu(mgmt->u.beacon.timestamp); 7553 bss_conf->sync_device_ts = 7554 rx_status->device_timestamp; 7555 bss_conf->sync_dtim_count = elems->dtim_count; 7556 } 7557 7558 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7559 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7560 parse_params.start, 7561 parse_params.len))) 7562 goto free; 7563 link->u.mgd.beacon_crc = ncrc; 7564 link->u.mgd.beacon_crc_valid = true; 7565 7566 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7567 7568 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7569 rx_status->device_timestamp, 7570 elems, elems, 7571 IEEE80211_CSA_SOURCE_BEACON); 7572 7573 /* note that after this elems->ml_basic can no longer be used fully */ 7574 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7575 7576 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7577 7578 if (!sdata->u.mgd.epcs.enabled && 7579 !link->u.mgd.disable_wmm_tracking && 7580 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7581 elems->wmm_param_len, 7582 elems->mu_edca_param_set)) 7583 changed |= BSS_CHANGED_QOS; 7584 7585 /* 7586 * If we haven't had a beacon before, tell the driver about the 7587 * DTIM period (and beacon timing if desired) now. 7588 */ 7589 if (!link->u.mgd.have_beacon) { 7590 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7591 bss_conf->dtim_period = elems->dtim_period ?: 1; 7592 7593 changed |= BSS_CHANGED_BEACON_INFO; 7594 link->u.mgd.have_beacon = true; 7595 7596 ieee80211_recalc_ps(local); 7597 7598 ieee80211_recalc_ps_vif(sdata); 7599 } 7600 7601 if (elems->erp_info) { 7602 erp_valid = true; 7603 erp_value = elems->erp_info[0]; 7604 } else { 7605 erp_valid = false; 7606 } 7607 7608 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7609 changed |= ieee80211_handle_bss_capability(link, 7610 le16_to_cpu(mgmt->u.beacon.capab_info), 7611 erp_valid, erp_value); 7612 7613 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7614 if (WARN_ON(!sta)) { 7615 goto free; 7616 } 7617 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7618 lockdep_is_held(&local->hw.wiphy->mtx)); 7619 if (WARN_ON(!link_sta)) { 7620 goto free; 7621 } 7622 7623 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7624 goto free; 7625 7626 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7627 7628 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7629 7630 if (ieee80211_config_bw(link, elems, true, &changed, 7631 IEEE80211_STYPE_BEACON)) { 7632 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7633 WLAN_REASON_DEAUTH_LEAVING, 7634 true, deauth_buf); 7635 ieee80211_report_disconnect(sdata, deauth_buf, 7636 sizeof(deauth_buf), true, 7637 WLAN_REASON_DEAUTH_LEAVING, 7638 false); 7639 goto free; 7640 } 7641 7642 if (elems->opmode_notif) 7643 ieee80211_vht_handle_opmode(sdata, link_sta, 7644 *elems->opmode_notif, 7645 rx_status->band); 7646 7647 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7648 elems->country_elem, 7649 elems->country_elem_len, 7650 elems->pwr_constr_elem, 7651 elems->cisco_dtpc_elem); 7652 7653 ieee80211_ml_reconfiguration(sdata, elems); 7654 ieee80211_process_adv_ttlm(sdata, elems, 7655 le64_to_cpu(mgmt->u.beacon.timestamp)); 7656 7657 ieee80211_link_info_change_notify(sdata, link, changed); 7658 free: 7659 kfree(elems); 7660 } 7661 7662 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7663 struct ieee80211_neg_ttlm neg_ttlm) 7664 { 7665 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7666 u8 i; 7667 7668 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7669 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7670 7671 /* If there is an active TTLM, unset previously suspended links */ 7672 if (sdata->vif.neg_ttlm.valid) 7673 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7674 7675 /* exclude links that are already disabled by advertised TTLM */ 7676 new_active_links = 7677 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7678 new_suspended_links = 7679 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7680 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7681 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7682 new_dormant_links, new_suspended_links)) 7683 return; 7684 7685 sdata->vif.neg_ttlm = neg_ttlm; 7686 sdata->vif.neg_ttlm.valid = true; 7687 } 7688 7689 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7690 struct wiphy_work *work) 7691 { 7692 struct ieee80211_sub_if_data *sdata = 7693 container_of(work, struct ieee80211_sub_if_data, 7694 u.mgd.neg_ttlm_timeout_work.work); 7695 7696 sdata_info(sdata, 7697 "No negotiated TTLM response from AP, disconnecting.\n"); 7698 7699 __ieee80211_disconnect(sdata); 7700 } 7701 7702 static void 7703 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7704 struct ieee80211_neg_ttlm *neg_ttlm) 7705 { 7706 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7707 7708 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7709 sizeof(neg_ttlm->downlink))) { 7710 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7711 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7712 } else { 7713 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7714 } 7715 7716 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7717 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7718 __le16 map; 7719 7720 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7721 7722 pos = skb_put(skb, len + 2); 7723 *pos++ = WLAN_EID_EXTENSION; 7724 len_pos = pos++; 7725 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7726 *pos++ = direction[i]; 7727 map_ind_pos = pos++; 7728 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7729 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7730 cpu_to_le16(neg_ttlm->uplink[tid]) : 7731 cpu_to_le16(neg_ttlm->downlink[tid]); 7732 if (!map) 7733 continue; 7734 7735 len += 2; 7736 map_ind |= BIT(tid); 7737 skb_put_data(skb, &map, sizeof(map)); 7738 } 7739 7740 *map_ind_pos = map_ind; 7741 *len_pos = len; 7742 7743 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7744 break; 7745 } 7746 } 7747 7748 static void 7749 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7750 struct ieee80211_neg_ttlm *neg_ttlm, 7751 u8 dialog_token) 7752 { 7753 struct ieee80211_local *local = sdata->local; 7754 struct ieee80211_mgmt *mgmt; 7755 struct sk_buff *skb; 7756 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7757 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7758 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7759 7760 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7761 if (!skb) 7762 return; 7763 7764 skb_reserve(skb, local->tx_headroom); 7765 mgmt = skb_put_zero(skb, hdr_len); 7766 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7767 IEEE80211_STYPE_ACTION); 7768 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7769 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7770 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7771 7772 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7773 mgmt->u.action.u.ttlm_req.action_code = 7774 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7775 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7776 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7777 ieee80211_tx_skb(sdata, skb); 7778 } 7779 7780 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7781 struct cfg80211_ttlm_params *params) 7782 { 7783 struct ieee80211_neg_ttlm neg_ttlm = {}; 7784 u8 i; 7785 7786 if (!ieee80211_vif_is_mld(&sdata->vif) || 7787 !(sdata->vif.cfg.mld_capa_op & 7788 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7789 return -EINVAL; 7790 7791 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7792 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7793 (params->ulink[i] & ~sdata->vif.valid_links)) 7794 return -EINVAL; 7795 7796 neg_ttlm.downlink[i] = params->dlink[i]; 7797 neg_ttlm.uplink[i] = params->ulink[i]; 7798 } 7799 7800 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7801 NEG_TTLM_RES_ACCEPT) 7802 return -EINVAL; 7803 7804 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7805 sdata->u.mgd.dialog_token_alloc++; 7806 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7807 sdata->u.mgd.dialog_token_alloc); 7808 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7809 &sdata->u.mgd.neg_ttlm_timeout_work); 7810 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7811 &sdata->u.mgd.neg_ttlm_timeout_work, 7812 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7813 return 0; 7814 } 7815 7816 static void 7817 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7818 enum ieee80211_neg_ttlm_res ttlm_res, 7819 u8 dialog_token, 7820 struct ieee80211_neg_ttlm *neg_ttlm) 7821 { 7822 struct ieee80211_local *local = sdata->local; 7823 struct ieee80211_mgmt *mgmt; 7824 struct sk_buff *skb; 7825 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7826 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7827 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7828 u16 status_code; 7829 7830 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7831 if (!skb) 7832 return; 7833 7834 skb_reserve(skb, local->tx_headroom); 7835 mgmt = skb_put_zero(skb, hdr_len); 7836 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7837 IEEE80211_STYPE_ACTION); 7838 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7839 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7840 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7841 7842 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7843 mgmt->u.action.u.ttlm_res.action_code = 7844 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7845 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7846 switch (ttlm_res) { 7847 default: 7848 WARN_ON(1); 7849 fallthrough; 7850 case NEG_TTLM_RES_REJECT: 7851 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7852 break; 7853 case NEG_TTLM_RES_ACCEPT: 7854 status_code = WLAN_STATUS_SUCCESS; 7855 break; 7856 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7857 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7858 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7859 break; 7860 } 7861 7862 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7863 ieee80211_tx_skb(sdata, skb); 7864 } 7865 7866 static int 7867 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7868 const struct ieee80211_ttlm_elem *ttlm, 7869 struct ieee80211_neg_ttlm *neg_ttlm, 7870 u8 *direction) 7871 { 7872 u8 control, link_map_presence, map_size, tid; 7873 u8 *pos; 7874 7875 /* The element size was already validated in 7876 * ieee80211_tid_to_link_map_size_ok() 7877 */ 7878 pos = (void *)ttlm->optional; 7879 7880 control = ttlm->control; 7881 7882 /* mapping switch time and expected duration fields are not expected 7883 * in case of negotiated TTLM 7884 */ 7885 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7886 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7887 mlme_dbg(sdata, 7888 "Invalid TTLM element in negotiated TTLM request\n"); 7889 return -EINVAL; 7890 } 7891 7892 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7893 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7894 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7895 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7896 } 7897 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7898 return 0; 7899 } 7900 7901 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7902 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7903 *direction != IEEE80211_TTLM_DIRECTION_UP && 7904 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7905 return -EINVAL; 7906 7907 link_map_presence = *pos; 7908 pos++; 7909 7910 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7911 map_size = 1; 7912 else 7913 map_size = 2; 7914 7915 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7916 u16 map; 7917 7918 if (link_map_presence & BIT(tid)) { 7919 map = ieee80211_get_ttlm(map_size, pos); 7920 if (!map) { 7921 mlme_dbg(sdata, 7922 "No active links for TID %d", tid); 7923 return -EINVAL; 7924 } 7925 } else { 7926 map = 0; 7927 } 7928 7929 switch (*direction) { 7930 case IEEE80211_TTLM_DIRECTION_BOTH: 7931 neg_ttlm->downlink[tid] = map; 7932 neg_ttlm->uplink[tid] = map; 7933 break; 7934 case IEEE80211_TTLM_DIRECTION_DOWN: 7935 neg_ttlm->downlink[tid] = map; 7936 break; 7937 case IEEE80211_TTLM_DIRECTION_UP: 7938 neg_ttlm->uplink[tid] = map; 7939 break; 7940 default: 7941 return -EINVAL; 7942 } 7943 pos += map_size; 7944 } 7945 return 0; 7946 } 7947 7948 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7949 struct ieee80211_mgmt *mgmt, size_t len) 7950 { 7951 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7952 size_t ies_len; 7953 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7954 struct ieee802_11_elems *elems = NULL; 7955 struct ieee80211_neg_ttlm neg_ttlm = {}; 7956 7957 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7958 7959 if (!ieee80211_vif_is_mld(&sdata->vif)) 7960 return; 7961 7962 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7963 ies_len = len - offsetof(struct ieee80211_mgmt, 7964 u.action.u.ttlm_req.variable); 7965 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7966 ies_len, true, NULL); 7967 if (!elems) { 7968 ttlm_res = NEG_TTLM_RES_REJECT; 7969 goto out; 7970 } 7971 7972 for (i = 0; i < elems->ttlm_num; i++) { 7973 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7974 &neg_ttlm, &direction[i]) || 7975 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7976 elems->ttlm_num != 1)) { 7977 ttlm_res = NEG_TTLM_RES_REJECT; 7978 goto out; 7979 } 7980 } 7981 7982 if (!elems->ttlm_num || 7983 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7984 ttlm_res = NEG_TTLM_RES_REJECT; 7985 goto out; 7986 } 7987 7988 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7989 if ((neg_ttlm.downlink[i] && 7990 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7991 (neg_ttlm.uplink[i] && 7992 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7993 ttlm_res = NEG_TTLM_RES_REJECT; 7994 goto out; 7995 } 7996 } 7997 7998 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7999 8000 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8001 goto out; 8002 8003 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8004 out: 8005 kfree(elems); 8006 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8007 } 8008 8009 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8010 struct ieee80211_mgmt *mgmt, size_t len) 8011 { 8012 if (!ieee80211_vif_is_mld(&sdata->vif) || 8013 mgmt->u.action.u.ttlm_req.dialog_token != 8014 sdata->u.mgd.dialog_token_alloc) 8015 return; 8016 8017 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8018 &sdata->u.mgd.neg_ttlm_timeout_work); 8019 8020 /* MLD station sends a TID to link mapping request, mainly to handle 8021 * BTM (BSS transition management) request, in which case it needs to 8022 * restrict the active links set. 8023 * In this case it's not expected that the MLD AP will reject the 8024 * negotiated TTLM request. 8025 * This can be better implemented in the future, to handle request 8026 * rejections. 8027 */ 8028 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8029 __ieee80211_disconnect(sdata); 8030 } 8031 8032 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8033 { 8034 u16 new_dormant_links; 8035 8036 if (!sdata->vif.neg_ttlm.valid) 8037 return; 8038 8039 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8040 new_dormant_links = 8041 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8042 sdata->vif.suspended_links = 0; 8043 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8044 new_dormant_links); 8045 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8046 BSS_CHANGED_MLD_VALID_LINKS); 8047 } 8048 8049 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8050 struct wiphy_work *work) 8051 { 8052 struct ieee80211_sub_if_data *sdata = 8053 container_of(work, struct ieee80211_sub_if_data, 8054 u.mgd.teardown_ttlm_work); 8055 8056 ieee80211_process_ttlm_teardown(sdata); 8057 } 8058 8059 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8060 { 8061 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8062 struct ieee80211_local *local = sdata->local; 8063 struct ieee80211_mgmt *mgmt; 8064 struct sk_buff *skb; 8065 int frame_len = offsetofend(struct ieee80211_mgmt, 8066 u.action.u.ttlm_tear_down); 8067 struct ieee80211_tx_info *info; 8068 8069 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8070 if (!skb) 8071 return; 8072 8073 skb_reserve(skb, local->hw.extra_tx_headroom); 8074 mgmt = skb_put_zero(skb, frame_len); 8075 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8076 IEEE80211_STYPE_ACTION); 8077 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8078 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8079 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8080 8081 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8082 mgmt->u.action.u.ttlm_tear_down.action_code = 8083 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8084 8085 info = IEEE80211_SKB_CB(skb); 8086 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8087 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8088 ieee80211_tx_skb(sdata, skb); 8089 } 8090 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8091 8092 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8093 struct sk_buff *skb) 8094 { 8095 struct ieee80211_link_data *link = &sdata->deflink; 8096 struct ieee80211_rx_status *rx_status; 8097 struct ieee80211_hdr *hdr; 8098 u16 fc; 8099 8100 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8101 8102 rx_status = (struct ieee80211_rx_status *) skb->cb; 8103 hdr = (struct ieee80211_hdr *) skb->data; 8104 fc = le16_to_cpu(hdr->frame_control); 8105 8106 switch (fc & IEEE80211_FCTL_STYPE) { 8107 case IEEE80211_STYPE_S1G_BEACON: 8108 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8109 break; 8110 } 8111 } 8112 8113 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8114 struct sk_buff *skb) 8115 { 8116 struct ieee80211_link_data *link = &sdata->deflink; 8117 struct ieee80211_rx_status *rx_status; 8118 struct ieee802_11_elems *elems; 8119 struct ieee80211_mgmt *mgmt; 8120 u16 fc; 8121 int ies_len; 8122 8123 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8124 8125 rx_status = (struct ieee80211_rx_status *) skb->cb; 8126 mgmt = (struct ieee80211_mgmt *) skb->data; 8127 fc = le16_to_cpu(mgmt->frame_control); 8128 8129 if (rx_status->link_valid) { 8130 link = sdata_dereference(sdata->link[rx_status->link_id], 8131 sdata); 8132 if (!link) 8133 return; 8134 } 8135 8136 switch (fc & IEEE80211_FCTL_STYPE) { 8137 case IEEE80211_STYPE_BEACON: 8138 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8139 skb->len, rx_status); 8140 break; 8141 case IEEE80211_STYPE_PROBE_RESP: 8142 ieee80211_rx_mgmt_probe_resp(link, skb); 8143 break; 8144 case IEEE80211_STYPE_AUTH: 8145 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8146 break; 8147 case IEEE80211_STYPE_DEAUTH: 8148 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8149 break; 8150 case IEEE80211_STYPE_DISASSOC: 8151 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8152 break; 8153 case IEEE80211_STYPE_ASSOC_RESP: 8154 case IEEE80211_STYPE_REASSOC_RESP: 8155 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8156 break; 8157 case IEEE80211_STYPE_ACTION: 8158 if (!sdata->u.mgd.associated || 8159 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8160 break; 8161 8162 switch (mgmt->u.action.category) { 8163 case WLAN_CATEGORY_SPECTRUM_MGMT: 8164 ies_len = skb->len - 8165 offsetof(struct ieee80211_mgmt, 8166 u.action.u.chan_switch.variable); 8167 8168 if (ies_len < 0) 8169 break; 8170 8171 /* CSA IE cannot be overridden, no need for BSSID */ 8172 elems = ieee802_11_parse_elems( 8173 mgmt->u.action.u.chan_switch.variable, 8174 ies_len, true, NULL); 8175 8176 if (elems && !elems->parse_error) { 8177 enum ieee80211_csa_source src = 8178 IEEE80211_CSA_SOURCE_PROT_ACTION; 8179 8180 ieee80211_sta_process_chanswitch(link, 8181 rx_status->mactime, 8182 rx_status->device_timestamp, 8183 elems, elems, 8184 src); 8185 } 8186 kfree(elems); 8187 break; 8188 case WLAN_CATEGORY_PUBLIC: 8189 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8190 ies_len = skb->len - 8191 offsetof(struct ieee80211_mgmt, 8192 u.action.u.ext_chan_switch.variable); 8193 8194 if (ies_len < 0) 8195 break; 8196 8197 /* 8198 * extended CSA IE can't be overridden, no need for 8199 * BSSID 8200 */ 8201 elems = ieee802_11_parse_elems( 8202 mgmt->u.action.u.ext_chan_switch.variable, 8203 ies_len, true, NULL); 8204 8205 if (elems && !elems->parse_error) { 8206 enum ieee80211_csa_source src; 8207 8208 if (mgmt->u.action.category == 8209 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8210 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8211 else 8212 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8213 8214 /* for the handling code pretend it was an IE */ 8215 elems->ext_chansw_ie = 8216 &mgmt->u.action.u.ext_chan_switch.data; 8217 8218 ieee80211_sta_process_chanswitch(link, 8219 rx_status->mactime, 8220 rx_status->device_timestamp, 8221 elems, elems, 8222 src); 8223 } 8224 8225 kfree(elems); 8226 break; 8227 } 8228 break; 8229 } 8230 } 8231 8232 static void ieee80211_sta_timer(struct timer_list *t) 8233 { 8234 struct ieee80211_sub_if_data *sdata = 8235 timer_container_of(sdata, t, u.mgd.timer); 8236 8237 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8238 } 8239 8240 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8241 u8 reason, bool tx) 8242 { 8243 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8244 8245 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8246 tx, frame_buf); 8247 8248 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8249 reason, false); 8250 } 8251 8252 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8253 { 8254 struct ieee80211_local *local = sdata->local; 8255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8256 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8257 u32 tx_flags = 0; 8258 u16 trans = 1; 8259 u16 status = 0; 8260 struct ieee80211_prep_tx_info info = { 8261 .subtype = IEEE80211_STYPE_AUTH, 8262 }; 8263 8264 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8265 8266 if (WARN_ON_ONCE(!auth_data)) 8267 return -EINVAL; 8268 8269 auth_data->tries++; 8270 8271 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8272 sdata_info(sdata, "authentication with %pM timed out\n", 8273 auth_data->ap_addr); 8274 8275 /* 8276 * Most likely AP is not in the range so remove the 8277 * bss struct for that AP. 8278 */ 8279 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8280 8281 return -ETIMEDOUT; 8282 } 8283 8284 if (auth_data->algorithm == WLAN_AUTH_SAE) 8285 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8286 8287 info.link_id = auth_data->link_id; 8288 drv_mgd_prepare_tx(local, sdata, &info); 8289 8290 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8291 auth_data->ap_addr, auth_data->tries, 8292 IEEE80211_AUTH_MAX_TRIES); 8293 8294 auth_data->expected_transaction = 2; 8295 8296 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8297 trans = auth_data->sae_trans; 8298 status = auth_data->sae_status; 8299 auth_data->expected_transaction = trans; 8300 } 8301 8302 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8303 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8304 IEEE80211_TX_INTFL_MLME_CONN_TX; 8305 8306 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8307 auth_data->data, auth_data->data_len, 8308 auth_data->ap_addr, auth_data->ap_addr, 8309 NULL, 0, 0, tx_flags); 8310 8311 if (tx_flags == 0) { 8312 if (auth_data->algorithm == WLAN_AUTH_SAE) 8313 auth_data->timeout = jiffies + 8314 IEEE80211_AUTH_TIMEOUT_SAE; 8315 else 8316 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8317 } else { 8318 auth_data->timeout = 8319 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8320 } 8321 8322 auth_data->timeout_started = true; 8323 run_again(sdata, auth_data->timeout); 8324 8325 return 0; 8326 } 8327 8328 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8329 { 8330 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8331 struct ieee80211_local *local = sdata->local; 8332 int ret; 8333 8334 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8335 8336 assoc_data->tries++; 8337 assoc_data->comeback = false; 8338 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8339 sdata_info(sdata, "association with %pM timed out\n", 8340 assoc_data->ap_addr); 8341 8342 /* 8343 * Most likely AP is not in the range so remove the 8344 * bss struct for that AP. 8345 */ 8346 cfg80211_unlink_bss(local->hw.wiphy, 8347 assoc_data->link[assoc_data->assoc_link_id].bss); 8348 8349 return -ETIMEDOUT; 8350 } 8351 8352 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8353 assoc_data->ap_addr, assoc_data->tries, 8354 IEEE80211_ASSOC_MAX_TRIES); 8355 ret = ieee80211_send_assoc(sdata); 8356 if (ret) 8357 return ret; 8358 8359 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8360 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8361 assoc_data->timeout_started = true; 8362 run_again(sdata, assoc_data->timeout); 8363 } else { 8364 assoc_data->timeout = 8365 round_jiffies_up(jiffies + 8366 IEEE80211_ASSOC_TIMEOUT_LONG); 8367 assoc_data->timeout_started = true; 8368 run_again(sdata, assoc_data->timeout); 8369 } 8370 8371 return 0; 8372 } 8373 8374 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8375 __le16 fc, bool acked) 8376 { 8377 struct ieee80211_local *local = sdata->local; 8378 8379 sdata->u.mgd.status_fc = fc; 8380 sdata->u.mgd.status_acked = acked; 8381 sdata->u.mgd.status_received = true; 8382 8383 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8384 } 8385 8386 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8387 { 8388 struct ieee80211_local *local = sdata->local; 8389 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8390 8391 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8392 8393 if (ifmgd->status_received) { 8394 __le16 fc = ifmgd->status_fc; 8395 bool status_acked = ifmgd->status_acked; 8396 8397 ifmgd->status_received = false; 8398 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8399 if (status_acked) { 8400 if (ifmgd->auth_data->algorithm == 8401 WLAN_AUTH_SAE) 8402 ifmgd->auth_data->timeout = 8403 jiffies + 8404 IEEE80211_AUTH_TIMEOUT_SAE; 8405 else 8406 ifmgd->auth_data->timeout = 8407 jiffies + 8408 IEEE80211_AUTH_TIMEOUT_SHORT; 8409 run_again(sdata, ifmgd->auth_data->timeout); 8410 } else { 8411 ifmgd->auth_data->timeout = jiffies - 1; 8412 } 8413 ifmgd->auth_data->timeout_started = true; 8414 } else if (ifmgd->assoc_data && 8415 !ifmgd->assoc_data->comeback && 8416 (ieee80211_is_assoc_req(fc) || 8417 ieee80211_is_reassoc_req(fc))) { 8418 /* 8419 * Update association timeout based on the TX status 8420 * for the (Re)Association Request frame. Skip this if 8421 * we have already processed a (Re)Association Response 8422 * frame that indicated need for association comeback 8423 * at a specific time in the future. This could happen 8424 * if the TX status information is delayed enough for 8425 * the response to be received and processed first. 8426 */ 8427 if (status_acked) { 8428 ifmgd->assoc_data->timeout = 8429 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8430 run_again(sdata, ifmgd->assoc_data->timeout); 8431 } else { 8432 ifmgd->assoc_data->timeout = jiffies - 1; 8433 } 8434 ifmgd->assoc_data->timeout_started = true; 8435 } 8436 } 8437 8438 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8439 time_after(jiffies, ifmgd->auth_data->timeout)) { 8440 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8441 /* 8442 * ok ... we waited for assoc or continuation but 8443 * userspace didn't do it, so kill the auth data 8444 */ 8445 ieee80211_destroy_auth_data(sdata, false); 8446 } else if (ieee80211_auth(sdata)) { 8447 u8 ap_addr[ETH_ALEN]; 8448 struct ieee80211_event event = { 8449 .type = MLME_EVENT, 8450 .u.mlme.data = AUTH_EVENT, 8451 .u.mlme.status = MLME_TIMEOUT, 8452 }; 8453 8454 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8455 8456 ieee80211_destroy_auth_data(sdata, false); 8457 8458 cfg80211_auth_timeout(sdata->dev, ap_addr); 8459 drv_event_callback(sdata->local, sdata, &event); 8460 } 8461 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8462 run_again(sdata, ifmgd->auth_data->timeout); 8463 8464 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8465 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8466 if ((ifmgd->assoc_data->need_beacon && 8467 !sdata->deflink.u.mgd.have_beacon) || 8468 ieee80211_do_assoc(sdata)) { 8469 struct ieee80211_event event = { 8470 .type = MLME_EVENT, 8471 .u.mlme.data = ASSOC_EVENT, 8472 .u.mlme.status = MLME_TIMEOUT, 8473 }; 8474 8475 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8476 drv_event_callback(sdata->local, sdata, &event); 8477 } 8478 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8479 run_again(sdata, ifmgd->assoc_data->timeout); 8480 8481 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8482 ifmgd->associated) { 8483 u8 *bssid = sdata->deflink.u.mgd.bssid; 8484 int max_tries; 8485 8486 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8487 max_tries = max_nullfunc_tries; 8488 else 8489 max_tries = max_probe_tries; 8490 8491 /* ACK received for nullfunc probing frame */ 8492 if (!ifmgd->probe_send_count) 8493 ieee80211_reset_ap_probe(sdata); 8494 else if (ifmgd->nullfunc_failed) { 8495 if (ifmgd->probe_send_count < max_tries) { 8496 mlme_dbg(sdata, 8497 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8498 bssid, ifmgd->probe_send_count, 8499 max_tries); 8500 ieee80211_mgd_probe_ap_send(sdata); 8501 } else { 8502 mlme_dbg(sdata, 8503 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8504 bssid); 8505 ieee80211_sta_connection_lost(sdata, 8506 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8507 false); 8508 } 8509 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8510 run_again(sdata, ifmgd->probe_timeout); 8511 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8512 mlme_dbg(sdata, 8513 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8514 bssid, probe_wait_ms); 8515 ieee80211_sta_connection_lost(sdata, 8516 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8517 } else if (ifmgd->probe_send_count < max_tries) { 8518 mlme_dbg(sdata, 8519 "No probe response from AP %pM after %dms, try %d/%i\n", 8520 bssid, probe_wait_ms, 8521 ifmgd->probe_send_count, max_tries); 8522 ieee80211_mgd_probe_ap_send(sdata); 8523 } else { 8524 /* 8525 * We actually lost the connection ... or did we? 8526 * Let's make sure! 8527 */ 8528 mlme_dbg(sdata, 8529 "No probe response from AP %pM after %dms, disconnecting.\n", 8530 bssid, probe_wait_ms); 8531 8532 ieee80211_sta_connection_lost(sdata, 8533 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8534 } 8535 } 8536 } 8537 8538 static bool 8539 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8540 { 8541 /* 8542 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8543 * the links. 8544 */ 8545 struct ieee80211_link_data *link; 8546 8547 guard(rcu)(); 8548 8549 for_each_link_data_rcu(sdata, link) { 8550 if (!(link->conf->csa_active && 8551 !link->u.mgd.csa.waiting_bcn)) 8552 return false; 8553 } 8554 8555 return true; 8556 } 8557 8558 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8559 { 8560 struct ieee80211_sub_if_data *sdata = 8561 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8562 8563 if (ieee80211_is_csa_in_progress(sdata)) 8564 return; 8565 8566 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8567 return; 8568 8569 sdata->u.mgd.connection_loss = false; 8570 wiphy_work_queue(sdata->local->hw.wiphy, 8571 &sdata->u.mgd.beacon_connection_loss_work); 8572 } 8573 8574 static unsigned long 8575 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8576 { 8577 unsigned long latest_timeout = jiffies; 8578 unsigned int link_id; 8579 struct sta_info *sta; 8580 8581 guard(rcu)(); 8582 8583 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8584 if (!sta) 8585 return 0; 8586 8587 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8588 link_id++) { 8589 struct link_sta_info *link_sta; 8590 unsigned long timeout; 8591 8592 link_sta = rcu_dereference(sta->link[link_id]); 8593 if (!link_sta) 8594 continue; 8595 8596 timeout = link_sta->status_stats.last_ack; 8597 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8598 timeout = link_sta->rx_stats.last_rx; 8599 8600 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8601 8602 /* 8603 * latest_timeout holds the timeout of the link 8604 * that will expire last among all links in an 8605 * non-AP MLD STA. This ensures that the connection 8606 * monitor timer is only reset if at least one link 8607 * is still active, and it is scheduled to fire at 8608 * the latest possible timeout. 8609 */ 8610 if (time_after(timeout, latest_timeout)) 8611 latest_timeout = timeout; 8612 } 8613 8614 return latest_timeout; 8615 } 8616 8617 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8618 { 8619 struct ieee80211_sub_if_data *sdata = 8620 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8622 struct ieee80211_local *local = sdata->local; 8623 unsigned long latest_timeout; 8624 8625 if (ieee80211_is_csa_in_progress(sdata)) 8626 return; 8627 8628 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8629 8630 /* 8631 * If latest timeout is after now, then update timer to fire at 8632 * the later date, but do not actually probe at this time. 8633 */ 8634 if (time_is_after_jiffies(latest_timeout)) { 8635 mod_timer(&ifmgd->conn_mon_timer, 8636 round_jiffies_up(latest_timeout)); 8637 return; 8638 } 8639 8640 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8641 } 8642 8643 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8644 struct wiphy_work *work) 8645 { 8646 struct ieee80211_sub_if_data *sdata = 8647 container_of(work, struct ieee80211_sub_if_data, 8648 u.mgd.monitor_work); 8649 8650 ieee80211_mgd_probe_ap(sdata, false); 8651 } 8652 8653 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8654 { 8655 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8656 __ieee80211_stop_poll(sdata); 8657 8658 /* let's probe the connection once */ 8659 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8660 wiphy_work_queue(sdata->local->hw.wiphy, 8661 &sdata->u.mgd.monitor_work); 8662 } 8663 } 8664 8665 #ifdef CONFIG_PM 8666 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8667 { 8668 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8669 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8670 8671 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8672 8673 if (ifmgd->auth_data || ifmgd->assoc_data) { 8674 const u8 *ap_addr = ifmgd->auth_data ? 8675 ifmgd->auth_data->ap_addr : 8676 ifmgd->assoc_data->ap_addr; 8677 8678 /* 8679 * If we are trying to authenticate / associate while suspending, 8680 * cfg80211 won't know and won't actually abort those attempts, 8681 * thus we need to do that ourselves. 8682 */ 8683 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8684 IEEE80211_STYPE_DEAUTH, 8685 WLAN_REASON_DEAUTH_LEAVING, 8686 false, frame_buf); 8687 if (ifmgd->assoc_data) 8688 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8689 if (ifmgd->auth_data) 8690 ieee80211_destroy_auth_data(sdata, false); 8691 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8692 IEEE80211_DEAUTH_FRAME_LEN, 8693 false); 8694 } 8695 8696 /* This is a bit of a hack - we should find a better and more generic 8697 * solution to this. Normally when suspending, cfg80211 will in fact 8698 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8699 * auth (not so important) or assoc (this is the problem) process. 8700 * 8701 * As a consequence, it can happen that we are in the process of both 8702 * associating and suspending, and receive an association response 8703 * after cfg80211 has checked if it needs to disconnect, but before 8704 * we actually set the flag to drop incoming frames. This will then 8705 * cause the workqueue flush to process the association response in 8706 * the suspend, resulting in a successful association just before it 8707 * tries to remove the interface from the driver, which now though 8708 * has a channel context assigned ... this results in issues. 8709 * 8710 * To work around this (for now) simply deauth here again if we're 8711 * now connected. 8712 */ 8713 if (ifmgd->associated && !sdata->local->wowlan) { 8714 u8 bssid[ETH_ALEN]; 8715 struct cfg80211_deauth_request req = { 8716 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8717 .bssid = bssid, 8718 }; 8719 8720 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8721 ieee80211_mgd_deauth(sdata, &req); 8722 } 8723 } 8724 #endif 8725 8726 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8727 { 8728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8729 8730 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8731 8732 if (!ifmgd->associated) 8733 return; 8734 8735 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8736 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8737 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8738 ieee80211_sta_connection_lost(sdata, 8739 WLAN_REASON_UNSPECIFIED, 8740 true); 8741 return; 8742 } 8743 8744 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8745 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8746 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8747 ieee80211_sta_connection_lost(sdata, 8748 WLAN_REASON_UNSPECIFIED, 8749 true); 8750 return; 8751 } 8752 } 8753 8754 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8755 struct wiphy_work *work) 8756 { 8757 struct ieee80211_link_data *link = 8758 container_of(work, struct ieee80211_link_data, 8759 u.mgd.request_smps_work); 8760 8761 __ieee80211_request_smps_mgd(link->sdata, link, 8762 link->u.mgd.driver_smps_mode); 8763 } 8764 8765 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8766 struct wiphy_work *work) 8767 { 8768 struct ieee80211_sub_if_data *sdata = 8769 container_of(work, struct ieee80211_sub_if_data, 8770 u.mgd.reconf.wk.work); 8771 8772 if (!sdata->u.mgd.reconf.added_links && 8773 !sdata->u.mgd.reconf.removed_links) 8774 return; 8775 8776 sdata_info(sdata, 8777 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8778 sdata->u.mgd.reconf.added_links, 8779 sdata->u.mgd.reconf.removed_links); 8780 8781 __ieee80211_disconnect(sdata); 8782 } 8783 8784 /* interface setup */ 8785 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8786 { 8787 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8788 8789 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8790 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8791 ieee80211_beacon_connection_loss_work); 8792 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8793 ieee80211_csa_connection_drop_work); 8794 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8795 ieee80211_tdls_peer_del_work); 8796 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8797 ieee80211_ml_reconf_work); 8798 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8799 ieee80211_ml_sta_reconf_timeout); 8800 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8801 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8802 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8803 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8804 ieee80211_sta_handle_tspec_ac_params_wk); 8805 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8806 ieee80211_tid_to_link_map_work); 8807 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8808 ieee80211_neg_ttlm_timeout_work); 8809 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8810 ieee80211_teardown_ttlm_work); 8811 8812 ifmgd->flags = 0; 8813 ifmgd->powersave = sdata->wdev.ps; 8814 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8815 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8816 /* Setup TDLS data */ 8817 spin_lock_init(&ifmgd->teardown_lock); 8818 ifmgd->teardown_skb = NULL; 8819 ifmgd->orig_teardown_skb = NULL; 8820 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8821 } 8822 8823 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8824 struct wiphy_work *work) 8825 { 8826 struct ieee80211_link_data *link = 8827 container_of(work, struct ieee80211_link_data, 8828 u.mgd.recalc_smps); 8829 8830 ieee80211_recalc_smps(link->sdata, link); 8831 } 8832 8833 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8834 { 8835 struct ieee80211_sub_if_data *sdata = link->sdata; 8836 struct ieee80211_local *local = sdata->local; 8837 unsigned int link_id = link->link_id; 8838 8839 link->u.mgd.p2p_noa_index = -1; 8840 link->conf->bssid = link->u.mgd.bssid; 8841 link->smps_mode = IEEE80211_SMPS_OFF; 8842 8843 wiphy_work_init(&link->u.mgd.request_smps_work, 8844 ieee80211_request_smps_mgd_work); 8845 wiphy_work_init(&link->u.mgd.recalc_smps, 8846 ieee80211_recalc_smps_work); 8847 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8848 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8849 else 8850 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8851 8852 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8853 ieee80211_csa_switch_work); 8854 8855 ieee80211_clear_tpe(&link->conf->tpe); 8856 8857 if (sdata->u.mgd.assoc_data) 8858 ether_addr_copy(link->conf->addr, 8859 sdata->u.mgd.assoc_data->link[link_id].addr); 8860 else if (sdata->u.mgd.reconf.add_links_data) 8861 ether_addr_copy(link->conf->addr, 8862 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8863 else if (!is_valid_ether_addr(link->conf->addr)) 8864 eth_random_addr(link->conf->addr); 8865 } 8866 8867 /* scan finished notification */ 8868 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8869 { 8870 struct ieee80211_sub_if_data *sdata; 8871 8872 /* Restart STA timers */ 8873 rcu_read_lock(); 8874 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8875 if (ieee80211_sdata_running(sdata)) 8876 ieee80211_restart_sta_timer(sdata); 8877 } 8878 rcu_read_unlock(); 8879 } 8880 8881 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8882 struct cfg80211_bss *cbss, s8 link_id, 8883 const u8 *ap_mld_addr, bool assoc, 8884 struct ieee80211_conn_settings *conn, 8885 bool override, 8886 unsigned long *userspace_selectors) 8887 { 8888 struct ieee80211_local *local = sdata->local; 8889 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8890 struct ieee80211_bss *bss = (void *)cbss->priv; 8891 struct sta_info *new_sta = NULL; 8892 struct ieee80211_link_data *link; 8893 bool have_sta = false; 8894 bool mlo; 8895 int err; 8896 u16 new_links; 8897 8898 if (link_id >= 0) { 8899 mlo = true; 8900 if (WARN_ON(!ap_mld_addr)) 8901 return -EINVAL; 8902 new_links = BIT(link_id); 8903 } else { 8904 if (WARN_ON(ap_mld_addr)) 8905 return -EINVAL; 8906 ap_mld_addr = cbss->bssid; 8907 new_links = 0; 8908 link_id = 0; 8909 mlo = false; 8910 } 8911 8912 if (assoc) { 8913 rcu_read_lock(); 8914 have_sta = sta_info_get(sdata, ap_mld_addr); 8915 rcu_read_unlock(); 8916 } 8917 8918 if (mlo && !have_sta && 8919 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8920 return -EINVAL; 8921 8922 err = ieee80211_vif_set_links(sdata, new_links, 0); 8923 if (err) 8924 return err; 8925 8926 link = sdata_dereference(sdata->link[link_id], sdata); 8927 if (WARN_ON(!link)) { 8928 err = -ENOLINK; 8929 goto out_err; 8930 } 8931 8932 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8933 err = -EINVAL; 8934 goto out_err; 8935 } 8936 8937 /* If a reconfig is happening, bail out */ 8938 if (local->in_reconfig) { 8939 err = -EBUSY; 8940 goto out_err; 8941 } 8942 8943 if (!have_sta) { 8944 if (mlo) 8945 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8946 link_id, cbss->bssid, 8947 GFP_KERNEL); 8948 else 8949 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8950 8951 if (!new_sta) { 8952 err = -ENOMEM; 8953 goto out_err; 8954 } 8955 8956 new_sta->sta.mlo = mlo; 8957 } 8958 8959 /* 8960 * Set up the information for the new channel before setting the 8961 * new channel. We can't - completely race-free - change the basic 8962 * rates bitmap and the channel (sband) that it refers to, but if 8963 * we set it up before we at least avoid calling into the driver's 8964 * bss_info_changed() method with invalid information (since we do 8965 * call that from changing the channel - only for IDLE and perhaps 8966 * some others, but ...). 8967 * 8968 * So to avoid that, just set up all the new information before the 8969 * channel, but tell the driver to apply it only afterwards, since 8970 * it might need the new channel for that. 8971 */ 8972 if (new_sta) { 8973 const struct cfg80211_bss_ies *ies; 8974 struct link_sta_info *link_sta; 8975 8976 rcu_read_lock(); 8977 link_sta = rcu_dereference(new_sta->link[link_id]); 8978 if (WARN_ON(!link_sta)) { 8979 rcu_read_unlock(); 8980 sta_info_free(local, new_sta); 8981 err = -EINVAL; 8982 goto out_err; 8983 } 8984 8985 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8986 link_sta, cbss); 8987 if (err) { 8988 rcu_read_unlock(); 8989 sta_info_free(local, new_sta); 8990 goto out_err; 8991 } 8992 8993 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8994 8995 /* set timing information */ 8996 link->conf->beacon_int = cbss->beacon_interval; 8997 ies = rcu_dereference(cbss->beacon_ies); 8998 if (ies) { 8999 link->conf->sync_tsf = ies->tsf; 9000 link->conf->sync_device_ts = 9001 bss->device_ts_beacon; 9002 9003 ieee80211_get_dtim(ies, 9004 &link->conf->sync_dtim_count, 9005 NULL); 9006 } else if (!ieee80211_hw_check(&sdata->local->hw, 9007 TIMING_BEACON_ONLY)) { 9008 ies = rcu_dereference(cbss->proberesp_ies); 9009 /* must be non-NULL since beacon IEs were NULL */ 9010 link->conf->sync_tsf = ies->tsf; 9011 link->conf->sync_device_ts = 9012 bss->device_ts_presp; 9013 link->conf->sync_dtim_count = 0; 9014 } else { 9015 link->conf->sync_tsf = 0; 9016 link->conf->sync_device_ts = 0; 9017 link->conf->sync_dtim_count = 0; 9018 } 9019 rcu_read_unlock(); 9020 } 9021 9022 if (new_sta || override) { 9023 /* 9024 * Only set this if we're also going to calculate the AP 9025 * settings etc., otherwise this was set before in a 9026 * previous call. Note override is set to %true in assoc 9027 * if the settings were changed. 9028 */ 9029 link->u.mgd.conn = *conn; 9030 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9031 mlo, &link->u.mgd.conn, 9032 userspace_selectors); 9033 if (err) { 9034 if (new_sta) 9035 sta_info_free(local, new_sta); 9036 goto out_err; 9037 } 9038 /* pass out for use in assoc */ 9039 *conn = link->u.mgd.conn; 9040 } 9041 9042 if (new_sta) { 9043 /* 9044 * tell driver about BSSID, basic rates and timing 9045 * this was set up above, before setting the channel 9046 */ 9047 ieee80211_link_info_change_notify(sdata, link, 9048 BSS_CHANGED_BSSID | 9049 BSS_CHANGED_BASIC_RATES | 9050 BSS_CHANGED_BEACON_INT); 9051 9052 if (assoc) 9053 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9054 9055 err = sta_info_insert(new_sta); 9056 new_sta = NULL; 9057 if (err) { 9058 sdata_info(sdata, 9059 "failed to insert STA entry for the AP (error %d)\n", 9060 err); 9061 goto out_release_chan; 9062 } 9063 } else 9064 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9065 9066 /* Cancel scan to ensure that nothing interferes with connection */ 9067 if (local->scanning) 9068 ieee80211_scan_cancel(local); 9069 9070 return 0; 9071 9072 out_release_chan: 9073 ieee80211_link_release_channel(link); 9074 out_err: 9075 ieee80211_vif_set_links(sdata, 0, 0); 9076 return err; 9077 } 9078 9079 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9080 const struct cfg80211_bss_ies *ies, 9081 u8 cur_channel, bool ignore_ecsa) 9082 { 9083 const struct element *csa_elem, *ecsa_elem; 9084 struct ieee80211_channel_sw_ie *csa = NULL; 9085 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9086 9087 if (!ies) 9088 return false; 9089 9090 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9091 ies->data, ies->len); 9092 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9093 csa = (void *)csa_elem->data; 9094 9095 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9096 ies->data, ies->len); 9097 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9098 ecsa = (void *)ecsa_elem->data; 9099 9100 if (csa && csa->count == 0) 9101 csa = NULL; 9102 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9103 csa = NULL; 9104 9105 if (ecsa && ecsa->count == 0) 9106 ecsa = NULL; 9107 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9108 ecsa = NULL; 9109 9110 if (ignore_ecsa && ecsa) { 9111 sdata_info(sdata, 9112 "Ignoring ECSA in probe response - was considered stuck!\n"); 9113 return csa; 9114 } 9115 9116 return csa || ecsa; 9117 } 9118 9119 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9120 struct cfg80211_bss *bss) 9121 { 9122 u8 cur_channel; 9123 bool ret; 9124 9125 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9126 9127 rcu_read_lock(); 9128 if (ieee80211_mgd_csa_present(sdata, 9129 rcu_dereference(bss->beacon_ies), 9130 cur_channel, false)) { 9131 ret = true; 9132 goto out; 9133 } 9134 9135 if (ieee80211_mgd_csa_present(sdata, 9136 rcu_dereference(bss->proberesp_ies), 9137 cur_channel, bss->proberesp_ecsa_stuck)) { 9138 ret = true; 9139 goto out; 9140 } 9141 9142 ret = false; 9143 out: 9144 rcu_read_unlock(); 9145 return ret; 9146 } 9147 9148 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9149 const u8 *supported_selectors, 9150 u8 supported_selectors_len) 9151 { 9152 if (supported_selectors) { 9153 for (int i = 0; i < supported_selectors_len; i++) { 9154 set_bit(supported_selectors[i], 9155 userspace_selectors); 9156 } 9157 } else { 9158 /* Assume SAE_H2E support for backward compatibility. */ 9159 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9160 userspace_selectors); 9161 } 9162 } 9163 9164 /* config hooks */ 9165 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9166 struct cfg80211_auth_request *req) 9167 { 9168 struct ieee80211_local *local = sdata->local; 9169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9170 struct ieee80211_mgd_auth_data *auth_data; 9171 struct ieee80211_conn_settings conn; 9172 struct ieee80211_link_data *link; 9173 struct ieee80211_supported_band *sband; 9174 struct ieee80211_bss *bss; 9175 u16 auth_alg; 9176 int err; 9177 bool cont_auth, wmm_used; 9178 9179 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9180 9181 /* prepare auth data structure */ 9182 9183 switch (req->auth_type) { 9184 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9185 auth_alg = WLAN_AUTH_OPEN; 9186 break; 9187 case NL80211_AUTHTYPE_SHARED_KEY: 9188 if (fips_enabled) 9189 return -EOPNOTSUPP; 9190 auth_alg = WLAN_AUTH_SHARED_KEY; 9191 break; 9192 case NL80211_AUTHTYPE_FT: 9193 auth_alg = WLAN_AUTH_FT; 9194 break; 9195 case NL80211_AUTHTYPE_NETWORK_EAP: 9196 auth_alg = WLAN_AUTH_LEAP; 9197 break; 9198 case NL80211_AUTHTYPE_SAE: 9199 auth_alg = WLAN_AUTH_SAE; 9200 break; 9201 case NL80211_AUTHTYPE_FILS_SK: 9202 auth_alg = WLAN_AUTH_FILS_SK; 9203 break; 9204 case NL80211_AUTHTYPE_FILS_SK_PFS: 9205 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9206 break; 9207 case NL80211_AUTHTYPE_FILS_PK: 9208 auth_alg = WLAN_AUTH_FILS_PK; 9209 break; 9210 default: 9211 return -EOPNOTSUPP; 9212 } 9213 9214 if (ifmgd->assoc_data) 9215 return -EBUSY; 9216 9217 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9218 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9219 return -EINVAL; 9220 } 9221 9222 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9223 req->ie_len, GFP_KERNEL); 9224 if (!auth_data) 9225 return -ENOMEM; 9226 9227 memcpy(auth_data->ap_addr, 9228 req->ap_mld_addr ?: req->bss->bssid, 9229 ETH_ALEN); 9230 auth_data->bss = req->bss; 9231 auth_data->link_id = req->link_id; 9232 9233 if (req->auth_data_len >= 4) { 9234 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9235 __le16 *pos = (__le16 *) req->auth_data; 9236 9237 auth_data->sae_trans = le16_to_cpu(pos[0]); 9238 auth_data->sae_status = le16_to_cpu(pos[1]); 9239 } 9240 memcpy(auth_data->data, req->auth_data + 4, 9241 req->auth_data_len - 4); 9242 auth_data->data_len += req->auth_data_len - 4; 9243 } 9244 9245 /* Check if continuing authentication or trying to authenticate with the 9246 * same BSS that we were in the process of authenticating with and avoid 9247 * removal and re-addition of the STA entry in 9248 * ieee80211_prep_connection(). 9249 */ 9250 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9251 ifmgd->auth_data->link_id == req->link_id; 9252 9253 if (req->ie && req->ie_len) { 9254 memcpy(&auth_data->data[auth_data->data_len], 9255 req->ie, req->ie_len); 9256 auth_data->data_len += req->ie_len; 9257 } 9258 9259 if (req->key && req->key_len) { 9260 auth_data->key_len = req->key_len; 9261 auth_data->key_idx = req->key_idx; 9262 memcpy(auth_data->key, req->key, req->key_len); 9263 } 9264 9265 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9266 req->supported_selectors, 9267 req->supported_selectors_len); 9268 9269 auth_data->algorithm = auth_alg; 9270 9271 /* try to authenticate/probe */ 9272 9273 if (ifmgd->auth_data) { 9274 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9275 auth_data->peer_confirmed = 9276 ifmgd->auth_data->peer_confirmed; 9277 } 9278 ieee80211_destroy_auth_data(sdata, cont_auth); 9279 } 9280 9281 /* prep auth_data so we don't go into idle on disassoc */ 9282 ifmgd->auth_data = auth_data; 9283 9284 /* If this is continuation of an ongoing SAE authentication exchange 9285 * (i.e., request to send SAE Confirm) and the peer has already 9286 * confirmed, mark authentication completed since we are about to send 9287 * out SAE Confirm. 9288 */ 9289 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9290 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9291 ieee80211_mark_sta_auth(sdata); 9292 9293 if (ifmgd->associated) { 9294 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9295 9296 sdata_info(sdata, 9297 "disconnect from AP %pM for new auth to %pM\n", 9298 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9299 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9300 WLAN_REASON_UNSPECIFIED, 9301 false, frame_buf); 9302 9303 ieee80211_report_disconnect(sdata, frame_buf, 9304 sizeof(frame_buf), true, 9305 WLAN_REASON_UNSPECIFIED, 9306 false); 9307 } 9308 9309 /* needed for transmitting the auth frame(s) properly */ 9310 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9311 9312 bss = (void *)req->bss->priv; 9313 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9314 9315 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9316 9317 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9318 &conn); 9319 9320 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9321 req->ap_mld_addr, cont_auth, 9322 &conn, false, 9323 auth_data->userspace_selectors); 9324 if (err) 9325 goto err_clear; 9326 9327 if (req->link_id >= 0) 9328 link = sdata_dereference(sdata->link[req->link_id], sdata); 9329 else 9330 link = &sdata->deflink; 9331 9332 if (WARN_ON(!link)) { 9333 err = -ENOLINK; 9334 goto err_clear; 9335 } 9336 9337 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9338 auth_data->ap_addr, link->conf->addr); 9339 9340 err = ieee80211_auth(sdata); 9341 if (err) { 9342 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9343 goto err_clear; 9344 } 9345 9346 /* hold our own reference */ 9347 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9348 return 0; 9349 9350 err_clear: 9351 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9352 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9353 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9354 BSS_CHANGED_BSSID); 9355 ieee80211_link_release_channel(&sdata->deflink); 9356 } 9357 ifmgd->auth_data = NULL; 9358 kfree(auth_data); 9359 return err; 9360 } 9361 9362 static void 9363 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9364 struct ieee80211_mgd_assoc_data *assoc_data, 9365 struct cfg80211_assoc_request *req, 9366 struct ieee80211_conn_settings *conn, 9367 unsigned int link_id) 9368 { 9369 struct ieee80211_local *local = sdata->local; 9370 const struct cfg80211_bss_ies *bss_ies; 9371 struct ieee80211_supported_band *sband; 9372 struct ieee80211_link_data *link; 9373 struct cfg80211_bss *cbss; 9374 struct ieee80211_bss *bss; 9375 9376 cbss = assoc_data->link[link_id].bss; 9377 if (WARN_ON(!cbss)) 9378 return; 9379 9380 bss = (void *)cbss->priv; 9381 9382 sband = local->hw.wiphy->bands[cbss->channel->band]; 9383 if (WARN_ON(!sband)) 9384 return; 9385 9386 link = sdata_dereference(sdata->link[link_id], sdata); 9387 if (WARN_ON(!link)) 9388 return; 9389 9390 /* for MLO connections assume advertising all rates is OK */ 9391 if (!req->ap_mld_addr) { 9392 assoc_data->supp_rates = bss->supp_rates; 9393 assoc_data->supp_rates_len = bss->supp_rates_len; 9394 } 9395 9396 /* copy and link elems for the STA profile */ 9397 if (req->links[link_id].elems_len) { 9398 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9399 req->links[link_id].elems_len); 9400 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9401 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9402 assoc_data->ie_pos += req->links[link_id].elems_len; 9403 } 9404 9405 link->u.mgd.beacon_crc_valid = false; 9406 link->u.mgd.dtim_period = 0; 9407 link->u.mgd.have_beacon = false; 9408 9409 /* override HT configuration only if the AP and we support it */ 9410 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9411 struct ieee80211_sta_ht_cap sta_ht_cap; 9412 9413 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9414 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9415 } 9416 9417 rcu_read_lock(); 9418 bss_ies = rcu_dereference(cbss->beacon_ies); 9419 if (bss_ies) { 9420 u8 dtim_count = 0; 9421 9422 ieee80211_get_dtim(bss_ies, &dtim_count, 9423 &link->u.mgd.dtim_period); 9424 9425 sdata->deflink.u.mgd.have_beacon = true; 9426 9427 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9428 link->conf->sync_tsf = bss_ies->tsf; 9429 link->conf->sync_device_ts = bss->device_ts_beacon; 9430 link->conf->sync_dtim_count = dtim_count; 9431 } 9432 } else { 9433 bss_ies = rcu_dereference(cbss->ies); 9434 } 9435 9436 if (bss_ies) { 9437 const struct element *elem; 9438 9439 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9440 bss_ies->data, bss_ies->len); 9441 if (elem && elem->datalen >= 3) 9442 link->conf->profile_periodicity = elem->data[2]; 9443 else 9444 link->conf->profile_periodicity = 0; 9445 9446 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9447 bss_ies->data, bss_ies->len); 9448 if (elem && elem->datalen >= 11 && 9449 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9450 link->conf->ema_ap = true; 9451 else 9452 link->conf->ema_ap = false; 9453 } 9454 rcu_read_unlock(); 9455 9456 if (bss->corrupt_data) { 9457 char *corrupt_type = "data"; 9458 9459 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9460 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9461 corrupt_type = "beacon and probe response"; 9462 else 9463 corrupt_type = "beacon"; 9464 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9465 corrupt_type = "probe response"; 9466 } 9467 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9468 cbss->bssid, corrupt_type); 9469 } 9470 9471 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9472 if (sdata->u.mgd.powersave) 9473 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9474 else 9475 link->smps_mode = IEEE80211_SMPS_OFF; 9476 } else { 9477 link->smps_mode = link->u.mgd.req_smps; 9478 } 9479 } 9480 9481 static int 9482 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9483 struct ieee80211_mgd_assoc_data *assoc_data, 9484 int link_id) 9485 { 9486 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9487 enum nl80211_band band = cbss->channel->band; 9488 struct ieee80211_supported_band *sband; 9489 const struct element *elem; 9490 int err; 9491 9492 /* neither HT nor VHT elements used on 6 GHz */ 9493 if (band == NL80211_BAND_6GHZ) 9494 return 0; 9495 9496 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9497 return 0; 9498 9499 rcu_read_lock(); 9500 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9501 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9502 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9503 cbss->bssid); 9504 err = -EINVAL; 9505 goto out_rcu; 9506 } 9507 assoc_data->link[link_id].ap_ht_param = 9508 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9509 rcu_read_unlock(); 9510 9511 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9512 return 0; 9513 9514 /* some drivers want to support VHT on 2.4 GHz even */ 9515 sband = sdata->local->hw.wiphy->bands[band]; 9516 if (!sband->vht_cap.vht_supported) 9517 return 0; 9518 9519 rcu_read_lock(); 9520 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9521 /* but even then accept it not being present on the AP */ 9522 if (!elem && band == NL80211_BAND_2GHZ) { 9523 err = 0; 9524 goto out_rcu; 9525 } 9526 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9527 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9528 cbss->bssid); 9529 err = -EINVAL; 9530 goto out_rcu; 9531 } 9532 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9533 sizeof(struct ieee80211_vht_cap)); 9534 rcu_read_unlock(); 9535 9536 return 0; 9537 out_rcu: 9538 rcu_read_unlock(); 9539 return err; 9540 } 9541 9542 static bool 9543 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9544 { 9545 const struct cfg80211_bss_ies *ies; 9546 struct cfg80211_bss *bss; 9547 const struct element *ml; 9548 9549 /* not an MLO connection if link_id < 0, so irrelevant */ 9550 if (req->link_id < 0) 9551 return false; 9552 9553 bss = req->links[req->link_id].bss; 9554 9555 guard(rcu)(); 9556 ies = rcu_dereference(bss->ies); 9557 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9558 ies->data, ies->len) { 9559 const struct ieee80211_multi_link_elem *mle; 9560 9561 if (!ieee80211_mle_type_ok(ml->data + 1, 9562 IEEE80211_ML_CONTROL_TYPE_BASIC, 9563 ml->datalen - 1)) 9564 continue; 9565 9566 mle = (void *)(ml->data + 1); 9567 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9568 return true; 9569 } 9570 9571 return false; 9572 9573 } 9574 9575 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9576 struct cfg80211_assoc_request *req) 9577 { 9578 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9579 struct ieee80211_local *local = sdata->local; 9580 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9581 struct ieee80211_mgd_assoc_data *assoc_data; 9582 const struct element *ssid_elem; 9583 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9584 struct ieee80211_link_data *link; 9585 struct cfg80211_bss *cbss; 9586 bool override, uapsd_supported; 9587 bool match_auth; 9588 int i, err; 9589 size_t size = sizeof(*assoc_data) + req->ie_len; 9590 9591 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9592 size += req->links[i].elems_len; 9593 9594 /* FIXME: no support for 4-addr MLO yet */ 9595 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9596 return -EOPNOTSUPP; 9597 9598 assoc_data = kzalloc(size, GFP_KERNEL); 9599 if (!assoc_data) 9600 return -ENOMEM; 9601 9602 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9603 9604 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9605 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9606 err = -EINVAL; 9607 goto err_free; 9608 } 9609 9610 rcu_read_lock(); 9611 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9612 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9613 rcu_read_unlock(); 9614 err = -EINVAL; 9615 goto err_free; 9616 } 9617 9618 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9619 assoc_data->ssid_len = ssid_elem->datalen; 9620 rcu_read_unlock(); 9621 9622 if (req->ap_mld_addr) 9623 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9624 else 9625 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9626 9627 /* 9628 * Many APs have broken parsing of the extended MLD capa/ops field, 9629 * dropping (re-)association request frames or replying with association 9630 * response with a failure status if it's present. 9631 * Set our value from the userspace request only in strict mode or if 9632 * the AP also had that field present. 9633 */ 9634 if (ieee80211_hw_check(&local->hw, STRICT) || 9635 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9636 assoc_data->ext_mld_capa_ops = 9637 cpu_to_le16(req->ext_mld_capa_ops); 9638 9639 if (ifmgd->associated) { 9640 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9641 9642 sdata_info(sdata, 9643 "disconnect from AP %pM for new assoc to %pM\n", 9644 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9645 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9646 WLAN_REASON_UNSPECIFIED, 9647 false, frame_buf); 9648 9649 ieee80211_report_disconnect(sdata, frame_buf, 9650 sizeof(frame_buf), true, 9651 WLAN_REASON_UNSPECIFIED, 9652 false); 9653 } 9654 9655 memset(sdata->u.mgd.userspace_selectors, 0, 9656 sizeof(sdata->u.mgd.userspace_selectors)); 9657 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9658 req->supported_selectors, 9659 req->supported_selectors_len); 9660 9661 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9662 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9663 sizeof(ifmgd->ht_capa_mask)); 9664 9665 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9666 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9667 sizeof(ifmgd->vht_capa_mask)); 9668 9669 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9670 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9671 sizeof(ifmgd->s1g_capa_mask)); 9672 9673 /* keep some setup (AP STA, channel, ...) if matching */ 9674 match_auth = ifmgd->auth_data && 9675 ether_addr_equal(ifmgd->auth_data->ap_addr, 9676 assoc_data->ap_addr) && 9677 ifmgd->auth_data->link_id == req->link_id; 9678 9679 if (req->ap_mld_addr) { 9680 uapsd_supported = true; 9681 9682 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9683 ASSOC_REQ_DISABLE_VHT | 9684 ASSOC_REQ_DISABLE_HE | 9685 ASSOC_REQ_DISABLE_EHT)) { 9686 err = -EINVAL; 9687 goto err_free; 9688 } 9689 9690 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9691 struct ieee80211_supported_band *sband; 9692 struct cfg80211_bss *link_cbss = req->links[i].bss; 9693 struct ieee80211_bss *bss; 9694 9695 if (!link_cbss) 9696 continue; 9697 9698 bss = (void *)link_cbss->priv; 9699 9700 if (!bss->wmm_used) { 9701 err = -EINVAL; 9702 req->links[i].error = err; 9703 goto err_free; 9704 } 9705 9706 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9707 err = -EINVAL; 9708 req->links[i].error = err; 9709 goto err_free; 9710 } 9711 9712 link = sdata_dereference(sdata->link[i], sdata); 9713 if (link) 9714 ether_addr_copy(assoc_data->link[i].addr, 9715 link->conf->addr); 9716 else 9717 eth_random_addr(assoc_data->link[i].addr); 9718 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9719 9720 if (match_auth && i == assoc_link_id && link) 9721 assoc_data->link[i].conn = link->u.mgd.conn; 9722 else 9723 assoc_data->link[i].conn = 9724 ieee80211_conn_settings_unlimited; 9725 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9726 req, true, i, 9727 &assoc_data->link[i].conn); 9728 assoc_data->link[i].bss = link_cbss; 9729 assoc_data->link[i].disabled = req->links[i].disabled; 9730 9731 if (!bss->uapsd_supported) 9732 uapsd_supported = false; 9733 9734 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9735 err = -EINVAL; 9736 req->links[i].error = err; 9737 goto err_free; 9738 } 9739 9740 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9741 assoc_data, i); 9742 if (err) { 9743 err = -EINVAL; 9744 req->links[i].error = err; 9745 goto err_free; 9746 } 9747 } 9748 9749 assoc_data->wmm = true; 9750 } else { 9751 struct ieee80211_supported_band *sband; 9752 struct ieee80211_bss *bss = (void *)cbss->priv; 9753 9754 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9755 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9756 9757 assoc_data->wmm = bss->wmm_used && 9758 (local->hw.queues >= IEEE80211_NUM_ACS); 9759 9760 if (cbss->channel->band == NL80211_BAND_6GHZ && 9761 req->flags & (ASSOC_REQ_DISABLE_HT | 9762 ASSOC_REQ_DISABLE_VHT | 9763 ASSOC_REQ_DISABLE_HE)) { 9764 err = -EINVAL; 9765 goto err_free; 9766 } 9767 9768 sband = local->hw.wiphy->bands[cbss->channel->band]; 9769 9770 assoc_data->link[0].bss = cbss; 9771 9772 if (match_auth) 9773 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9774 else 9775 assoc_data->link[0].conn = 9776 ieee80211_conn_settings_unlimited; 9777 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9778 assoc_data->wmm, 0, 9779 &assoc_data->link[0].conn); 9780 9781 uapsd_supported = bss->uapsd_supported; 9782 9783 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9784 if (err) 9785 goto err_free; 9786 } 9787 9788 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9789 9790 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9791 err = -EBUSY; 9792 goto err_free; 9793 } 9794 9795 if (ifmgd->assoc_data) { 9796 err = -EBUSY; 9797 goto err_free; 9798 } 9799 9800 /* Cleanup is delayed if auth_data matches */ 9801 if (ifmgd->auth_data && !match_auth) 9802 ieee80211_destroy_auth_data(sdata, false); 9803 9804 if (req->ie && req->ie_len) { 9805 memcpy(assoc_data->ie, req->ie, req->ie_len); 9806 assoc_data->ie_len = req->ie_len; 9807 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9808 } else { 9809 assoc_data->ie_pos = assoc_data->ie; 9810 } 9811 9812 if (req->fils_kek) { 9813 /* should already be checked in cfg80211 - so warn */ 9814 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9815 err = -EINVAL; 9816 goto err_free; 9817 } 9818 memcpy(assoc_data->fils_kek, req->fils_kek, 9819 req->fils_kek_len); 9820 assoc_data->fils_kek_len = req->fils_kek_len; 9821 } 9822 9823 if (req->fils_nonces) 9824 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9825 2 * FILS_NONCE_LEN); 9826 9827 /* default timeout */ 9828 assoc_data->timeout = jiffies; 9829 assoc_data->timeout_started = true; 9830 9831 assoc_data->assoc_link_id = assoc_link_id; 9832 9833 if (req->ap_mld_addr) { 9834 /* if there was no authentication, set up the link */ 9835 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9836 if (err) 9837 goto err_clear; 9838 } 9839 9840 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9841 if (WARN_ON(!link)) { 9842 err = -EINVAL; 9843 goto err_clear; 9844 } 9845 9846 override = link->u.mgd.conn.mode != 9847 assoc_data->link[assoc_link_id].conn.mode || 9848 link->u.mgd.conn.bw_limit != 9849 assoc_data->link[assoc_link_id].conn.bw_limit; 9850 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9851 9852 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9853 assoc_link_id); 9854 9855 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9856 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9857 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9858 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9859 9860 if (assoc_data->wmm && uapsd_supported && 9861 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9862 assoc_data->uapsd = true; 9863 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9864 } else { 9865 assoc_data->uapsd = false; 9866 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9867 } 9868 9869 if (req->prev_bssid) 9870 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9871 9872 if (req->use_mfp) { 9873 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9874 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9875 } else { 9876 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9877 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9878 } 9879 9880 if (req->flags & ASSOC_REQ_USE_RRM) 9881 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9882 else 9883 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9884 9885 if (req->crypto.control_port) 9886 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9887 else 9888 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9889 9890 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9891 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9892 sdata->control_port_over_nl80211 = 9893 req->crypto.control_port_over_nl80211; 9894 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9895 9896 /* kick off associate process */ 9897 ifmgd->assoc_data = assoc_data; 9898 9899 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9900 if (!assoc_data->link[i].bss) 9901 continue; 9902 if (i == assoc_data->assoc_link_id) 9903 continue; 9904 /* only calculate the mode, hence link == NULL */ 9905 err = ieee80211_prep_channel(sdata, NULL, i, 9906 assoc_data->link[i].bss, true, 9907 &assoc_data->link[i].conn, 9908 sdata->u.mgd.userspace_selectors); 9909 if (err) { 9910 req->links[i].error = err; 9911 goto err_clear; 9912 } 9913 } 9914 9915 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9916 vif_cfg->ssid_len = assoc_data->ssid_len; 9917 9918 /* needed for transmitting the assoc frames properly */ 9919 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9920 9921 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9922 req->ap_mld_addr, true, 9923 &assoc_data->link[assoc_link_id].conn, 9924 override, 9925 sdata->u.mgd.userspace_selectors); 9926 if (err) 9927 goto err_clear; 9928 9929 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9930 const struct cfg80211_bss_ies *beacon_ies; 9931 9932 rcu_read_lock(); 9933 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9934 if (!beacon_ies) { 9935 /* 9936 * Wait up to one beacon interval ... 9937 * should this be more if we miss one? 9938 */ 9939 sdata_info(sdata, "waiting for beacon from %pM\n", 9940 link->u.mgd.bssid); 9941 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9942 assoc_data->timeout_started = true; 9943 assoc_data->need_beacon = true; 9944 } 9945 rcu_read_unlock(); 9946 } 9947 9948 run_again(sdata, assoc_data->timeout); 9949 9950 /* We are associating, clean up auth_data */ 9951 if (ifmgd->auth_data) 9952 ieee80211_destroy_auth_data(sdata, true); 9953 9954 return 0; 9955 err_clear: 9956 if (!ifmgd->auth_data) { 9957 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9958 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9959 BSS_CHANGED_BSSID); 9960 } 9961 ifmgd->assoc_data = NULL; 9962 err_free: 9963 kfree(assoc_data); 9964 return err; 9965 } 9966 9967 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9968 struct cfg80211_deauth_request *req) 9969 { 9970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9971 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9972 bool tx = !req->local_state_change; 9973 struct ieee80211_prep_tx_info info = { 9974 .subtype = IEEE80211_STYPE_DEAUTH, 9975 }; 9976 9977 if (ifmgd->auth_data && 9978 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9979 sdata_info(sdata, 9980 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9981 req->bssid, req->reason_code, 9982 ieee80211_get_reason_code_string(req->reason_code)); 9983 9984 info.link_id = ifmgd->auth_data->link_id; 9985 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9986 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9987 IEEE80211_STYPE_DEAUTH, 9988 req->reason_code, tx, 9989 frame_buf); 9990 ieee80211_destroy_auth_data(sdata, false); 9991 ieee80211_report_disconnect(sdata, frame_buf, 9992 sizeof(frame_buf), true, 9993 req->reason_code, false); 9994 drv_mgd_complete_tx(sdata->local, sdata, &info); 9995 return 0; 9996 } 9997 9998 if (ifmgd->assoc_data && 9999 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10000 sdata_info(sdata, 10001 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10002 req->bssid, req->reason_code, 10003 ieee80211_get_reason_code_string(req->reason_code)); 10004 10005 info.link_id = ifmgd->assoc_data->assoc_link_id; 10006 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10007 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10008 IEEE80211_STYPE_DEAUTH, 10009 req->reason_code, tx, 10010 frame_buf); 10011 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10012 ieee80211_report_disconnect(sdata, frame_buf, 10013 sizeof(frame_buf), true, 10014 req->reason_code, false); 10015 drv_mgd_complete_tx(sdata->local, sdata, &info); 10016 return 0; 10017 } 10018 10019 if (ifmgd->associated && 10020 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10021 sdata_info(sdata, 10022 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10023 req->bssid, req->reason_code, 10024 ieee80211_get_reason_code_string(req->reason_code)); 10025 10026 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10027 req->reason_code, tx, frame_buf); 10028 ieee80211_report_disconnect(sdata, frame_buf, 10029 sizeof(frame_buf), true, 10030 req->reason_code, false); 10031 return 0; 10032 } 10033 10034 return -ENOTCONN; 10035 } 10036 10037 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10038 struct cfg80211_disassoc_request *req) 10039 { 10040 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10041 10042 if (!sdata->u.mgd.associated || 10043 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10044 return -ENOTCONN; 10045 10046 sdata_info(sdata, 10047 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10048 req->ap_addr, req->reason_code, 10049 ieee80211_get_reason_code_string(req->reason_code)); 10050 10051 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10052 req->reason_code, !req->local_state_change, 10053 frame_buf); 10054 10055 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10056 req->reason_code, false); 10057 10058 return 0; 10059 } 10060 10061 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10062 { 10063 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10064 &link->u.mgd.request_smps_work); 10065 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10066 &link->u.mgd.recalc_smps); 10067 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 10068 &link->u.mgd.csa.switch_work); 10069 } 10070 10071 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10072 { 10073 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10074 10075 /* 10076 * Make sure some work items will not run after this, 10077 * they will not do anything but might not have been 10078 * cancelled when disconnecting. 10079 */ 10080 wiphy_work_cancel(sdata->local->hw.wiphy, 10081 &ifmgd->monitor_work); 10082 wiphy_work_cancel(sdata->local->hw.wiphy, 10083 &ifmgd->beacon_connection_loss_work); 10084 wiphy_work_cancel(sdata->local->hw.wiphy, 10085 &ifmgd->csa_connection_drop_work); 10086 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10087 &ifmgd->tdls_peer_del_work); 10088 10089 if (ifmgd->assoc_data) 10090 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10091 if (ifmgd->auth_data) 10092 ieee80211_destroy_auth_data(sdata, false); 10093 spin_lock_bh(&ifmgd->teardown_lock); 10094 if (ifmgd->teardown_skb) { 10095 kfree_skb(ifmgd->teardown_skb); 10096 ifmgd->teardown_skb = NULL; 10097 ifmgd->orig_teardown_skb = NULL; 10098 } 10099 kfree(ifmgd->assoc_req_ies); 10100 ifmgd->assoc_req_ies = NULL; 10101 ifmgd->assoc_req_ies_len = 0; 10102 spin_unlock_bh(&ifmgd->teardown_lock); 10103 timer_delete_sync(&ifmgd->timer); 10104 } 10105 10106 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10107 enum nl80211_cqm_rssi_threshold_event rssi_event, 10108 s32 rssi_level, 10109 gfp_t gfp) 10110 { 10111 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10112 10113 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10114 10115 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10116 } 10117 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10118 10119 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10120 { 10121 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10122 10123 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10124 10125 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10126 } 10127 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10128 10129 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10130 int rssi_min_thold, 10131 int rssi_max_thold) 10132 { 10133 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10134 10135 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10136 return; 10137 10138 /* 10139 * Scale up threshold values before storing it, as the RSSI averaging 10140 * algorithm uses a scaled up value as well. Change this scaling 10141 * factor if the RSSI averaging algorithm changes. 10142 */ 10143 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10144 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10145 } 10146 10147 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10148 int rssi_min_thold, 10149 int rssi_max_thold) 10150 { 10151 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10152 10153 WARN_ON(rssi_min_thold == rssi_max_thold || 10154 rssi_min_thold > rssi_max_thold); 10155 10156 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10157 rssi_max_thold); 10158 } 10159 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10160 10161 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10162 { 10163 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10164 10165 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10166 } 10167 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10168 10169 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10170 struct ieee80211_mgmt *mgmt, size_t len) 10171 { 10172 struct ieee80211_local *local = sdata->local; 10173 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10174 struct ieee80211_mgd_assoc_data *add_links_data = 10175 ifmgd->reconf.add_links_data; 10176 struct sta_info *sta; 10177 struct cfg80211_mlo_reconf_done_data done_data = {}; 10178 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10179 sdata->u.mgd.reconf.removed_links; 10180 u16 link_mask, valid_links; 10181 unsigned int link_id; 10182 size_t orig_len = len; 10183 u8 i, group_key_data_len; 10184 u8 *pos; 10185 10186 if (!ieee80211_vif_is_mld(&sdata->vif) || 10187 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10188 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10189 sdata->u.mgd.reconf.dialog_token || 10190 !sta_changed_links) 10191 return; 10192 10193 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10194 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10195 10196 /* each status duple is 3 octets */ 10197 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10198 sdata_info(sdata, 10199 "mlo: reconf: unexpected len=%zu, count=%u\n", 10200 len, mgmt->u.action.u.ml_reconf_resp.count); 10201 goto disconnect; 10202 } 10203 10204 link_mask = sta_changed_links; 10205 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10206 u16 status = get_unaligned_le16(pos + 1); 10207 10208 link_id = *pos; 10209 10210 if (!(link_mask & BIT(link_id))) { 10211 sdata_info(sdata, 10212 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10213 link_id, sta_changed_links); 10214 goto disconnect; 10215 } 10216 10217 /* clear the corresponding link, to detect the case that 10218 * the same link was included more than one time 10219 */ 10220 link_mask &= ~BIT(link_id); 10221 10222 /* Handle failure to remove links here. Failure to remove added 10223 * links will be done later in the flow. 10224 */ 10225 if (status != WLAN_STATUS_SUCCESS) { 10226 sdata_info(sdata, 10227 "mlo: reconf: failed on link=%u, status=%u\n", 10228 link_id, status); 10229 10230 /* The AP MLD failed to remove a link that was already 10231 * removed locally. As this is not expected behavior, 10232 * disconnect 10233 */ 10234 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10235 goto disconnect; 10236 10237 /* The AP MLD failed to add a link. Remove it from the 10238 * added links. 10239 */ 10240 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10241 } 10242 10243 pos += 3; 10244 len -= 3; 10245 } 10246 10247 if (link_mask) { 10248 sdata_info(sdata, 10249 "mlo: reconf: no response for links=0x%x\n", 10250 link_mask); 10251 goto disconnect; 10252 } 10253 10254 if (!sdata->u.mgd.reconf.added_links) 10255 goto out; 10256 10257 if (len < 1 || len < 1 + *pos) { 10258 sdata_info(sdata, 10259 "mlo: reconf: invalid group key data length"); 10260 goto disconnect; 10261 } 10262 10263 /* The Group Key Data field must be present when links are added. This 10264 * field should be processed by userland. 10265 */ 10266 group_key_data_len = *pos++; 10267 10268 pos += group_key_data_len; 10269 len -= group_key_data_len + 1; 10270 10271 /* Process the information for the added links */ 10272 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10273 if (WARN_ON(!sta)) 10274 goto disconnect; 10275 10276 valid_links = sdata->vif.valid_links; 10277 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10278 if (!add_links_data->link[link_id].bss || 10279 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10280 continue; 10281 10282 valid_links |= BIT(link_id); 10283 if (ieee80211_sta_allocate_link(sta, link_id)) 10284 goto disconnect; 10285 } 10286 10287 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10288 link_mask = 0; 10289 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10290 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10291 struct ieee80211_link_data *link; 10292 struct link_sta_info *link_sta; 10293 u64 changed = 0; 10294 10295 if (!cbss) 10296 continue; 10297 10298 link = sdata_dereference(sdata->link[link_id], sdata); 10299 if (WARN_ON(!link)) 10300 goto disconnect; 10301 10302 link_info(link, 10303 "mlo: reconf: local address %pM, AP link address %pM\n", 10304 add_links_data->link[link_id].addr, 10305 add_links_data->link[link_id].bss->bssid); 10306 10307 link_sta = rcu_dereference_protected(sta->link[link_id], 10308 lockdep_is_held(&local->hw.wiphy->mtx)); 10309 if (WARN_ON(!link_sta)) 10310 goto disconnect; 10311 10312 if (!link->u.mgd.have_beacon) { 10313 const struct cfg80211_bss_ies *ies; 10314 10315 rcu_read_lock(); 10316 ies = rcu_dereference(cbss->beacon_ies); 10317 if (ies) 10318 link->u.mgd.have_beacon = true; 10319 else 10320 ies = rcu_dereference(cbss->ies); 10321 ieee80211_get_dtim(ies, 10322 &link->conf->sync_dtim_count, 10323 &link->u.mgd.dtim_period); 10324 link->conf->beacon_int = cbss->beacon_interval; 10325 rcu_read_unlock(); 10326 } 10327 10328 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10329 10330 link->u.mgd.conn = add_links_data->link[link_id].conn; 10331 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10332 true, &link->u.mgd.conn, 10333 sdata->u.mgd.userspace_selectors)) { 10334 link_info(link, "mlo: reconf: prep_channel failed\n"); 10335 goto disconnect; 10336 } 10337 10338 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10339 add_links_data->link[link_id].bss)) 10340 goto disconnect; 10341 10342 if (!ieee80211_assoc_config_link(link, link_sta, 10343 add_links_data->link[link_id].bss, 10344 mgmt, pos, len, 10345 &changed)) 10346 goto disconnect; 10347 10348 /* The AP MLD indicated success for this link, but the station 10349 * profile status indicated otherwise. Since there is an 10350 * inconsistency in the ML reconfiguration response, disconnect 10351 */ 10352 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10353 goto disconnect; 10354 10355 ieee80211_sta_init_nss(link_sta); 10356 if (ieee80211_sta_activate_link(sta, link_id)) 10357 goto disconnect; 10358 10359 changed |= ieee80211_link_set_associated(link, cbss); 10360 ieee80211_link_info_change_notify(sdata, link, changed); 10361 10362 ieee80211_recalc_smps(sdata, link); 10363 link_mask |= BIT(link_id); 10364 } 10365 10366 sdata_info(sdata, 10367 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10368 valid_links, link_mask); 10369 10370 /* links might have changed due to rejected ones, set them again */ 10371 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10372 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10373 10374 ieee80211_recalc_ps(local); 10375 ieee80211_recalc_ps_vif(sdata); 10376 10377 done_data.buf = (const u8 *)mgmt; 10378 done_data.len = orig_len; 10379 done_data.added_links = link_mask; 10380 10381 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10382 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10383 done_data.links[link_id].addr = 10384 add_links_data->link[link_id].addr; 10385 } 10386 10387 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10388 kfree(sdata->u.mgd.reconf.add_links_data); 10389 sdata->u.mgd.reconf.add_links_data = NULL; 10390 out: 10391 ieee80211_ml_reconf_reset(sdata); 10392 return; 10393 10394 disconnect: 10395 __ieee80211_disconnect(sdata); 10396 } 10397 10398 static struct sk_buff * 10399 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10400 struct ieee80211_mgd_assoc_data *add_links_data, 10401 u16 removed_links, __le16 ext_mld_capa_ops) 10402 { 10403 struct ieee80211_local *local = sdata->local; 10404 struct ieee80211_mgmt *mgmt; 10405 struct ieee80211_multi_link_elem *ml_elem; 10406 struct ieee80211_mle_basic_common_info *common; 10407 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10408 struct sk_buff *skb; 10409 size_t size; 10410 unsigned int link_id; 10411 __le16 eml_capa = 0, mld_capa_ops = 0; 10412 struct ieee80211_tx_info *info; 10413 u8 common_size, var_common_size; 10414 u8 *ml_elem_len; 10415 u16 capab = 0; 10416 10417 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10418 10419 /* Consider the maximal length of the reconfiguration ML element */ 10420 size += sizeof(struct ieee80211_multi_link_elem); 10421 10422 /* The Basic ML element and the Reconfiguration ML element have the same 10423 * fixed common information fields in the context of ML reconfiguration 10424 * action frame. The AP MLD MAC address must always be present 10425 */ 10426 common_size = sizeof(*common); 10427 10428 /* when adding links, the MLD capabilities must be present */ 10429 var_common_size = 0; 10430 if (add_links_data) { 10431 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10432 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10433 ieee80211_vif_type_p2p(&sdata->vif)); 10434 10435 if (ift_ext_capa) { 10436 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10437 mld_capa_ops = 10438 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10439 } 10440 10441 /* MLD capabilities and operation */ 10442 var_common_size += 2; 10443 10444 /* EML capabilities */ 10445 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10446 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10447 var_common_size += 2; 10448 } 10449 10450 if (ext_mld_capa_ops) 10451 var_common_size += 2; 10452 10453 /* Add the common information length */ 10454 size += common_size + var_common_size; 10455 10456 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10457 struct cfg80211_bss *cbss; 10458 size_t elems_len; 10459 10460 if (removed_links & BIT(link_id)) { 10461 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10462 ETH_ALEN; 10463 continue; 10464 } 10465 10466 if (!add_links_data || !add_links_data->link[link_id].bss) 10467 continue; 10468 10469 elems_len = add_links_data->link[link_id].elems_len; 10470 cbss = add_links_data->link[link_id].bss; 10471 10472 /* should be the same across all BSSes */ 10473 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10474 capab |= WLAN_CAPABILITY_PRIVACY; 10475 10476 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10477 ETH_ALEN; 10478 10479 /* WMM */ 10480 size += 9; 10481 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10482 elems_len); 10483 } 10484 10485 skb = alloc_skb(size, GFP_KERNEL); 10486 if (!skb) 10487 return NULL; 10488 10489 skb_reserve(skb, local->hw.extra_tx_headroom); 10490 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10491 u.action.u.ml_reconf_req)); 10492 10493 /* Add the MAC header */ 10494 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10495 IEEE80211_STYPE_ACTION); 10496 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10497 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10498 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10499 10500 /* Add the action frame fixed fields */ 10501 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10502 mgmt->u.action.u.ml_reconf_req.action_code = 10503 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10504 10505 /* allocate a dialog token and store it */ 10506 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10507 mgmt->u.action.u.ml_reconf_req.dialog_token = 10508 sdata->u.mgd.reconf.dialog_token; 10509 10510 /* Add the ML reconfiguration element and the common information */ 10511 skb_put_u8(skb, WLAN_EID_EXTENSION); 10512 ml_elem_len = skb_put(skb, 1); 10513 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10514 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10515 ml_elem->control = 10516 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10517 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10518 common = skb_put(skb, common_size); 10519 common->len = common_size + var_common_size; 10520 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10521 10522 if (add_links_data) { 10523 if (eml_capa & 10524 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10525 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10526 ml_elem->control |= 10527 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10528 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10529 } 10530 10531 ml_elem->control |= 10532 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10533 10534 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10535 } 10536 10537 if (ext_mld_capa_ops) { 10538 ml_elem->control |= 10539 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10540 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10541 } 10542 10543 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10544 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10545 10546 /* Add the per station profile */ 10547 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10548 u8 *subelem_len = NULL; 10549 u16 ctrl; 10550 const u8 *addr; 10551 10552 /* Skip links that are not changing */ 10553 if (!(removed_links & BIT(link_id)) && 10554 (!add_links_data || !add_links_data->link[link_id].bss)) 10555 continue; 10556 10557 ctrl = link_id | 10558 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10559 10560 if (removed_links & BIT(link_id)) { 10561 struct ieee80211_bss_conf *conf = 10562 sdata_dereference(sdata->vif.link_conf[link_id], 10563 sdata); 10564 if (!conf) 10565 continue; 10566 10567 addr = conf->addr; 10568 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10569 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10570 } else { 10571 addr = add_links_data->link[link_id].addr; 10572 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10573 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10574 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10575 } 10576 10577 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10578 subelem_len = skb_put(skb, 1); 10579 10580 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10581 skb_put_u8(skb, 1 + ETH_ALEN); 10582 skb_put_data(skb, addr, ETH_ALEN); 10583 10584 if (!(removed_links & BIT(link_id))) { 10585 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10586 size_t extra_used; 10587 void *capab_pos; 10588 u8 qos_info; 10589 10590 capab_pos = skb_put(skb, 2); 10591 10592 extra_used = 10593 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10594 add_links_data->link[link_id].elems, 10595 add_links_data->link[link_id].elems_len, 10596 link_id, NULL, 10597 link_present_elems, 10598 add_links_data); 10599 10600 if (add_links_data->link[link_id].elems) 10601 skb_put_data(skb, 10602 add_links_data->link[link_id].elems + 10603 extra_used, 10604 add_links_data->link[link_id].elems_len - 10605 extra_used); 10606 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10607 qos_info = sdata->u.mgd.uapsd_queues; 10608 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10609 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10610 } else { 10611 qos_info = 0; 10612 } 10613 10614 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10615 put_unaligned_le16(capab, capab_pos); 10616 } 10617 10618 ieee80211_fragment_element(skb, subelem_len, 10619 IEEE80211_MLE_SUBELEM_FRAGMENT); 10620 } 10621 10622 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10623 10624 info = IEEE80211_SKB_CB(skb); 10625 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10626 10627 return skb; 10628 } 10629 10630 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10631 struct cfg80211_ml_reconf_req *req) 10632 { 10633 struct ieee80211_local *local = sdata->local; 10634 struct ieee80211_mgd_assoc_data *data = NULL; 10635 struct sta_info *sta; 10636 struct sk_buff *skb; 10637 u16 added_links, new_valid_links; 10638 int link_id, err; 10639 10640 if (!ieee80211_vif_is_mld(&sdata->vif) || 10641 !(sdata->vif.cfg.mld_capa_op & 10642 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10643 return -EINVAL; 10644 10645 /* No support for concurrent ML reconfiguration operation */ 10646 if (sdata->u.mgd.reconf.added_links || 10647 sdata->u.mgd.reconf.removed_links) 10648 return -EBUSY; 10649 10650 added_links = 0; 10651 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10652 if (!req->add_links[link_id].bss) 10653 continue; 10654 10655 added_links |= BIT(link_id); 10656 } 10657 10658 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10659 if (WARN_ON(!sta)) 10660 return -ENOLINK; 10661 10662 /* Adding links to the set of valid link is done only after a successful 10663 * ML reconfiguration frame exchange. Here prepare the data for the ML 10664 * reconfiguration frame construction and allocate the required 10665 * resources 10666 */ 10667 if (added_links) { 10668 bool uapsd_supported; 10669 10670 data = kzalloc(sizeof(*data), GFP_KERNEL); 10671 if (!data) 10672 return -ENOMEM; 10673 10674 data->assoc_link_id = -1; 10675 data->wmm = true; 10676 10677 uapsd_supported = true; 10678 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10679 link_id++) { 10680 struct ieee80211_supported_band *sband; 10681 struct cfg80211_bss *link_cbss = 10682 req->add_links[link_id].bss; 10683 struct ieee80211_bss *bss; 10684 10685 if (!link_cbss) 10686 continue; 10687 10688 bss = (void *)link_cbss->priv; 10689 10690 if (!bss->wmm_used) { 10691 err = -EINVAL; 10692 goto err_free; 10693 } 10694 10695 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10696 err = -EINVAL; 10697 goto err_free; 10698 } 10699 10700 eth_random_addr(data->link[link_id].addr); 10701 data->link[link_id].conn = 10702 ieee80211_conn_settings_unlimited; 10703 sband = 10704 local->hw.wiphy->bands[link_cbss->channel->band]; 10705 10706 ieee80211_determine_our_sta_mode(sdata, sband, 10707 NULL, true, link_id, 10708 &data->link[link_id].conn); 10709 10710 data->link[link_id].bss = link_cbss; 10711 data->link[link_id].disabled = 10712 req->add_links[link_id].disabled; 10713 data->link[link_id].elems = 10714 (u8 *)req->add_links[link_id].elems; 10715 data->link[link_id].elems_len = 10716 req->add_links[link_id].elems_len; 10717 10718 if (!bss->uapsd_supported) 10719 uapsd_supported = false; 10720 10721 if (data->link[link_id].conn.mode < 10722 IEEE80211_CONN_MODE_EHT) { 10723 err = -EINVAL; 10724 goto err_free; 10725 } 10726 10727 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10728 link_id); 10729 if (err) { 10730 err = -EINVAL; 10731 goto err_free; 10732 } 10733 } 10734 10735 /* Require U-APSD support if we enabled it */ 10736 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10737 !uapsd_supported) { 10738 err = -EINVAL; 10739 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10740 goto err_free; 10741 } 10742 10743 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10744 link_id++) { 10745 if (!data->link[link_id].bss) 10746 continue; 10747 10748 /* only used to verify the mode, nothing is allocated */ 10749 err = ieee80211_prep_channel(sdata, NULL, link_id, 10750 data->link[link_id].bss, 10751 true, 10752 &data->link[link_id].conn, 10753 sdata->u.mgd.userspace_selectors); 10754 if (err) 10755 goto err_free; 10756 } 10757 } 10758 10759 /* link removal is done before the ML reconfiguration frame exchange so 10760 * that these links will not be used between their removal by the AP MLD 10761 * and before the station got the ML reconfiguration response. Based on 10762 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10763 * link removal request. 10764 */ 10765 if (req->rem_links) { 10766 u16 new_active_links = 10767 sdata->vif.active_links & ~req->rem_links; 10768 10769 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10770 10771 /* Should not be left with no valid links to perform the 10772 * ML reconfiguration 10773 */ 10774 if (!new_valid_links || 10775 !(new_valid_links & ~sdata->vif.dormant_links)) { 10776 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10777 err = -EINVAL; 10778 goto err_free; 10779 } 10780 10781 if (new_active_links != sdata->vif.active_links) { 10782 if (!new_active_links) 10783 new_active_links = 10784 BIT(__ffs(new_valid_links & 10785 ~sdata->vif.dormant_links)); 10786 10787 err = ieee80211_set_active_links(&sdata->vif, 10788 new_active_links); 10789 if (err) { 10790 sdata_info(sdata, 10791 "mlo: reconf: failed set active links\n"); 10792 goto err_free; 10793 } 10794 } 10795 } 10796 10797 /* Build the SKB before the link removal as the construction of the 10798 * station info for removed links requires the local address. 10799 * Invalidate the removed links, so that the transmission of the ML 10800 * reconfiguration request frame would not be done using them, as the AP 10801 * is expected to send the ML reconfiguration response frame on the link 10802 * on which the request was received. 10803 */ 10804 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10805 cpu_to_le16(req->ext_mld_capa_ops)); 10806 if (!skb) { 10807 err = -ENOMEM; 10808 goto err_free; 10809 } 10810 10811 if (req->rem_links) { 10812 u16 new_dormant_links = 10813 sdata->vif.dormant_links & ~req->rem_links; 10814 10815 err = ieee80211_vif_set_links(sdata, new_valid_links, 10816 new_dormant_links); 10817 if (err) { 10818 sdata_info(sdata, 10819 "mlo: reconf: failed set valid links\n"); 10820 kfree_skb(skb); 10821 goto err_free; 10822 } 10823 10824 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10825 link_id++) { 10826 if (!(req->rem_links & BIT(link_id))) 10827 continue; 10828 10829 ieee80211_sta_remove_link(sta, link_id); 10830 } 10831 10832 /* notify the driver and upper layers */ 10833 ieee80211_vif_cfg_change_notify(sdata, 10834 BSS_CHANGED_MLD_VALID_LINKS); 10835 cfg80211_links_removed(sdata->dev, req->rem_links); 10836 } 10837 10838 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10839 added_links, req->rem_links); 10840 10841 ieee80211_tx_skb(sdata, skb); 10842 10843 sdata->u.mgd.reconf.added_links = added_links; 10844 sdata->u.mgd.reconf.add_links_data = data; 10845 sdata->u.mgd.reconf.removed_links = req->rem_links; 10846 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10847 &sdata->u.mgd.reconf.wk, 10848 IEEE80211_ASSOC_TIMEOUT_SHORT); 10849 return 0; 10850 10851 err_free: 10852 kfree(data); 10853 return err; 10854 } 10855 10856 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10857 { 10858 unsigned long valid_links = sdata->vif.valid_links; 10859 u8 link_id; 10860 10861 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10862 10863 if (!ieee80211_vif_is_mld(&sdata->vif)) 10864 return false; 10865 10866 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10867 struct ieee80211_bss_conf *bss_conf = 10868 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10869 10870 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10871 return false; 10872 } 10873 10874 return true; 10875 } 10876 10877 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10878 { 10879 struct ieee80211_local *local = sdata->local; 10880 struct ieee80211_mgmt *mgmt; 10881 struct sk_buff *skb; 10882 int frame_len = offsetofend(struct ieee80211_mgmt, 10883 u.action.u.epcs) + (enable ? 1 : 0); 10884 10885 if (!ieee80211_mgd_epcs_supp(sdata)) 10886 return -EINVAL; 10887 10888 if (sdata->u.mgd.epcs.enabled == enable && 10889 !sdata->u.mgd.epcs.dialog_token) 10890 return 0; 10891 10892 /* Do not allow enabling EPCS if the AP didn't respond yet. 10893 * However, allow disabling EPCS in such a case. 10894 */ 10895 if (sdata->u.mgd.epcs.dialog_token && enable) 10896 return -EALREADY; 10897 10898 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10899 if (!skb) 10900 return -ENOBUFS; 10901 10902 skb_reserve(skb, local->hw.extra_tx_headroom); 10903 mgmt = skb_put_zero(skb, frame_len); 10904 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10905 IEEE80211_STYPE_ACTION); 10906 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10907 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10908 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10909 10910 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10911 if (enable) { 10912 u8 *pos = mgmt->u.action.u.epcs.variable; 10913 10914 mgmt->u.action.u.epcs.action_code = 10915 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10916 10917 *pos = ++sdata->u.mgd.dialog_token_alloc; 10918 sdata->u.mgd.epcs.dialog_token = *pos; 10919 } else { 10920 mgmt->u.action.u.epcs.action_code = 10921 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10922 10923 ieee80211_epcs_teardown(sdata); 10924 ieee80211_epcs_changed(sdata, false); 10925 } 10926 10927 ieee80211_tx_skb(sdata, skb); 10928 return 0; 10929 } 10930 10931 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10932 struct ieee802_11_elems *elems) 10933 { 10934 const struct element *sub; 10935 size_t scratch_len = elems->ml_epcs_len; 10936 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10937 10938 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10939 10940 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10941 return; 10942 10943 if (WARN_ON(!scratch)) 10944 return; 10945 10946 /* Directly parse the sub elements as the common information doesn't 10947 * hold any useful information. 10948 */ 10949 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10950 elems->ml_epcs_len) { 10951 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10952 struct ieee80211_link_data *link; 10953 u8 *pos = (void *)sub->data; 10954 u16 control; 10955 ssize_t len; 10956 u8 link_id; 10957 10958 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10959 continue; 10960 10961 if (sub->datalen < sizeof(control)) 10962 break; 10963 10964 control = get_unaligned_le16(pos); 10965 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10966 10967 link = sdata_dereference(sdata->link[link_id], sdata); 10968 if (!link) 10969 continue; 10970 10971 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10972 elems->ml_epcs_len, 10973 scratch, scratch_len, 10974 IEEE80211_MLE_SUBELEM_FRAGMENT); 10975 if (len < (ssize_t)sizeof(control)) 10976 continue; 10977 10978 pos = scratch + sizeof(control); 10979 len -= sizeof(control); 10980 10981 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10982 if (!link_elems) 10983 continue; 10984 10985 if (ieee80211_sta_wmm_params(sdata->local, link, 10986 link_elems->wmm_param, 10987 link_elems->wmm_param_len, 10988 link_elems->mu_edca_param_set)) 10989 ieee80211_link_info_change_notify(sdata, link, 10990 BSS_CHANGED_QOS); 10991 } 10992 } 10993 10994 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10995 struct ieee80211_mgmt *mgmt, size_t len) 10996 { 10997 struct ieee802_11_elems *elems __free(kfree) = NULL; 10998 size_t ies_len; 10999 u16 status_code; 11000 u8 *pos, dialog_token; 11001 11002 if (!ieee80211_mgd_epcs_supp(sdata)) 11003 return; 11004 11005 /* Handle dialog token and status code */ 11006 pos = mgmt->u.action.u.epcs.variable; 11007 dialog_token = *pos; 11008 status_code = get_unaligned_le16(pos + 1); 11009 11010 /* An EPCS enable response with dialog token == 0 is an unsolicited 11011 * notification from the AP MLD. In such a case, EPCS should already be 11012 * enabled and status must be success 11013 */ 11014 if (!dialog_token && 11015 (!sdata->u.mgd.epcs.enabled || 11016 status_code != WLAN_STATUS_SUCCESS)) 11017 return; 11018 11019 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11020 return; 11021 11022 sdata->u.mgd.epcs.dialog_token = 0; 11023 11024 if (status_code != WLAN_STATUS_SUCCESS) 11025 return; 11026 11027 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11028 ies_len = len - offsetof(struct ieee80211_mgmt, 11029 u.action.u.epcs.variable) - 11030 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11031 11032 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 11033 if (!elems) 11034 return; 11035 11036 ieee80211_ml_epcs(sdata, elems); 11037 ieee80211_epcs_changed(sdata, true); 11038 } 11039 11040 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11041 struct ieee80211_mgmt *mgmt, size_t len) 11042 { 11043 if (!ieee80211_vif_is_mld(&sdata->vif) || 11044 !sdata->u.mgd.epcs.enabled) 11045 return; 11046 11047 ieee80211_epcs_teardown(sdata); 11048 ieee80211_epcs_changed(sdata, false); 11049 } 11050