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 /* 2512 * The next beacon really should always be different, so this should 2513 * have no effect whatsoever. However, some APs (we observed this in 2514 * an Asus AXE11000), the beacon after the CSA might be identical to 2515 * the last beacon on the old channel - in this case we'd ignore it. 2516 * Resetting the CRC will lead us to handle it better (albeit with a 2517 * disconnect, but clearly the AP is broken.) 2518 */ 2519 link->u.mgd.beacon_crc_valid = false; 2520 2521 /* apply new TPE restrictions immediately on the new channel */ 2522 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2523 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2524 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2525 &link->u.mgd.csa.ap_chandef, 2526 &link->conf->chanreq.oper); 2527 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2528 sizeof(link->u.mgd.csa.tpe))) { 2529 link->conf->tpe = link->u.mgd.csa.tpe; 2530 ieee80211_link_info_change_notify(sdata, link, 2531 BSS_CHANGED_TPE); 2532 } 2533 } 2534 2535 /* 2536 * It is not necessary to reset these timers if any link does not 2537 * have an active CSA and that link still receives the beacons 2538 * when other links have active CSA. 2539 */ 2540 for_each_link_data(sdata, link) { 2541 if (!link->conf->csa_active) 2542 return; 2543 } 2544 2545 /* 2546 * Reset the beacon monitor and connection monitor timers when CSA 2547 * is active for all links in MLO when channel switch occurs in all 2548 * the links. 2549 */ 2550 ieee80211_sta_reset_beacon_monitor(sdata); 2551 ieee80211_sta_reset_conn_monitor(sdata); 2552 } 2553 2554 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2555 { 2556 struct ieee80211_sub_if_data *sdata = link->sdata; 2557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2558 int ret; 2559 2560 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2561 2562 WARN_ON(!link->conf->csa_active); 2563 2564 ieee80211_vif_unblock_queues_csa(sdata); 2565 2566 link->conf->csa_active = false; 2567 link->u.mgd.csa.blocked_tx = false; 2568 link->u.mgd.csa.waiting_bcn = false; 2569 2570 ret = drv_post_channel_switch(link); 2571 if (ret) { 2572 link_info(link, 2573 "driver post channel switch failed, disconnecting\n"); 2574 wiphy_work_queue(sdata->local->hw.wiphy, 2575 &ifmgd->csa_connection_drop_work); 2576 return; 2577 } 2578 2579 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2580 link->link_id); 2581 } 2582 2583 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2584 unsigned int link_id) 2585 { 2586 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2587 2588 trace_api_chswitch_done(sdata, success, link_id); 2589 2590 rcu_read_lock(); 2591 2592 if (!success) { 2593 sdata_info(sdata, 2594 "driver channel switch failed (link %d), disconnecting\n", 2595 link_id); 2596 wiphy_work_queue(sdata->local->hw.wiphy, 2597 &sdata->u.mgd.csa_connection_drop_work); 2598 } else { 2599 struct ieee80211_link_data *link = 2600 rcu_dereference(sdata->link[link_id]); 2601 2602 if (WARN_ON(!link)) { 2603 rcu_read_unlock(); 2604 return; 2605 } 2606 2607 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2608 &link->u.mgd.csa.switch_work, 0); 2609 } 2610 2611 rcu_read_unlock(); 2612 } 2613 EXPORT_SYMBOL(ieee80211_chswitch_done); 2614 2615 static void 2616 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2617 { 2618 struct ieee80211_sub_if_data *sdata = link->sdata; 2619 struct ieee80211_local *local = sdata->local; 2620 2621 lockdep_assert_wiphy(local->hw.wiphy); 2622 2623 if (!local->ops->abort_channel_switch) 2624 return; 2625 2626 if (rcu_access_pointer(link->conf->chanctx_conf)) 2627 ieee80211_link_unreserve_chanctx(link); 2628 2629 ieee80211_vif_unblock_queues_csa(sdata); 2630 2631 link->conf->csa_active = false; 2632 link->u.mgd.csa.blocked_tx = false; 2633 2634 drv_abort_channel_switch(link); 2635 } 2636 2637 struct sta_csa_rnr_iter_data { 2638 struct ieee80211_link_data *link; 2639 struct ieee80211_channel *chan; 2640 u8 mld_id; 2641 }; 2642 2643 static enum cfg80211_rnr_iter_ret 2644 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2645 const struct ieee80211_neighbor_ap_info *info, 2646 const u8 *tbtt_info, u8 tbtt_info_len) 2647 { 2648 struct sta_csa_rnr_iter_data *data = _data; 2649 struct ieee80211_link_data *link = data->link; 2650 struct ieee80211_sub_if_data *sdata = link->sdata; 2651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2652 const struct ieee80211_tbtt_info_ge_11 *ti; 2653 enum nl80211_band band; 2654 unsigned int center_freq; 2655 int link_id; 2656 2657 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2658 return RNR_ITER_CONTINUE; 2659 2660 if (tbtt_info_len < sizeof(*ti)) 2661 return RNR_ITER_CONTINUE; 2662 2663 ti = (const void *)tbtt_info; 2664 2665 if (ti->mld_params.mld_id != data->mld_id) 2666 return RNR_ITER_CONTINUE; 2667 2668 link_id = le16_get_bits(ti->mld_params.params, 2669 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2670 if (link_id != data->link->link_id) 2671 return RNR_ITER_CONTINUE; 2672 2673 /* we found the entry for our link! */ 2674 2675 /* this AP is confused, it had this right before ... just disconnect */ 2676 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2677 link_info(link, 2678 "AP now has invalid operating class in RNR, disconnect\n"); 2679 wiphy_work_queue(sdata->local->hw.wiphy, 2680 &ifmgd->csa_connection_drop_work); 2681 return RNR_ITER_BREAK; 2682 } 2683 2684 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2685 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2686 2687 return RNR_ITER_BREAK; 2688 } 2689 2690 static void 2691 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2692 struct ieee802_11_elems *elems) 2693 { 2694 struct ieee80211_sub_if_data *sdata = link->sdata; 2695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2696 struct sta_csa_rnr_iter_data data = { 2697 .link = link, 2698 }; 2699 2700 /* 2701 * If we get here, we see a beacon from another link without 2702 * CSA still being reported for it, so now we have to check 2703 * if the CSA was aborted or completed. This may not even be 2704 * perfectly possible if the CSA was only done for changing 2705 * the puncturing, but in that case if the link in inactive 2706 * we don't really care, and if it's an active link (or when 2707 * it's activated later) we'll get a beacon and adjust. 2708 */ 2709 2710 if (WARN_ON(!elems->ml_basic)) 2711 return; 2712 2713 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2714 2715 /* 2716 * So in order to do this, iterate the RNR element(s) and see 2717 * what channel is reported now. 2718 */ 2719 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2720 ieee80211_sta_csa_rnr_iter, &data); 2721 2722 if (!data.chan) { 2723 link_info(link, 2724 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2725 wiphy_work_queue(sdata->local->hw.wiphy, 2726 &ifmgd->csa_connection_drop_work); 2727 return; 2728 } 2729 2730 /* 2731 * If it doesn't match the CSA, then assume it aborted. This 2732 * may erroneously detect that it was _not_ aborted when it 2733 * was in fact aborted, but only changed the bandwidth or the 2734 * puncturing configuration, but we don't have enough data to 2735 * detect that. 2736 */ 2737 if (data.chan != link->csa.chanreq.oper.chan) 2738 ieee80211_sta_abort_chanswitch(link); 2739 } 2740 2741 enum ieee80211_csa_source { 2742 IEEE80211_CSA_SOURCE_BEACON, 2743 IEEE80211_CSA_SOURCE_OTHER_LINK, 2744 IEEE80211_CSA_SOURCE_PROT_ACTION, 2745 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2746 }; 2747 2748 static void 2749 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2750 u64 timestamp, u32 device_timestamp, 2751 struct ieee802_11_elems *full_elems, 2752 struct ieee802_11_elems *csa_elems, 2753 enum ieee80211_csa_source source) 2754 { 2755 struct ieee80211_sub_if_data *sdata = link->sdata; 2756 struct ieee80211_local *local = sdata->local; 2757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2758 struct ieee80211_chanctx *chanctx = NULL; 2759 struct ieee80211_chanctx_conf *conf; 2760 struct ieee80211_csa_ie csa_ie = {}; 2761 struct ieee80211_channel_switch ch_switch = { 2762 .link_id = link->link_id, 2763 .timestamp = timestamp, 2764 .device_timestamp = device_timestamp, 2765 }; 2766 unsigned long now; 2767 int res; 2768 2769 lockdep_assert_wiphy(local->hw.wiphy); 2770 2771 if (csa_elems) { 2772 struct cfg80211_bss *cbss = link->conf->bss; 2773 enum nl80211_band current_band; 2774 struct ieee80211_bss *bss; 2775 2776 if (WARN_ON(!cbss)) 2777 return; 2778 2779 current_band = cbss->channel->band; 2780 bss = (void *)cbss->priv; 2781 2782 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2783 current_band, 2784 bss->vht_cap_info, 2785 &link->u.mgd.conn, 2786 link->u.mgd.bssid, 2787 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2788 &csa_ie); 2789 if (res == 0) { 2790 ch_switch.block_tx = csa_ie.mode; 2791 ch_switch.chandef = csa_ie.chanreq.oper; 2792 ch_switch.count = csa_ie.count; 2793 ch_switch.delay = csa_ie.max_switch_time; 2794 } 2795 2796 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2797 } else { 2798 /* 2799 * If there was no per-STA profile for this link, we 2800 * get called with csa_elems == NULL. This of course means 2801 * there are no CSA elements, so set res=1 indicating 2802 * no more CSA. 2803 */ 2804 res = 1; 2805 } 2806 2807 if (res < 0) { 2808 /* ignore this case, not a protected frame */ 2809 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2810 return; 2811 goto drop_connection; 2812 } 2813 2814 if (link->conf->csa_active) { 2815 switch (source) { 2816 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2817 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2818 /* already processing - disregard action frames */ 2819 return; 2820 case IEEE80211_CSA_SOURCE_BEACON: 2821 if (link->u.mgd.csa.waiting_bcn) { 2822 ieee80211_chswitch_post_beacon(link); 2823 /* 2824 * If the CSA is still present after the switch 2825 * we need to consider it as a new CSA (possibly 2826 * to self). This happens by not returning here 2827 * so we'll get to the check below. 2828 */ 2829 } else if (res) { 2830 ieee80211_sta_abort_chanswitch(link); 2831 return; 2832 } else { 2833 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2834 return; 2835 } 2836 break; 2837 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2838 /* active link: we want to see the beacon to continue */ 2839 if (ieee80211_vif_link_active(&sdata->vif, 2840 link->link_id)) 2841 return; 2842 2843 /* switch work ran, so just complete the process */ 2844 if (link->u.mgd.csa.waiting_bcn) { 2845 ieee80211_chswitch_post_beacon(link); 2846 /* 2847 * If the CSA is still present after the switch 2848 * we need to consider it as a new CSA (possibly 2849 * to self). This happens by not returning here 2850 * so we'll get to the check below. 2851 */ 2852 break; 2853 } 2854 2855 /* link still has CSA but we already know, do nothing */ 2856 if (!res) 2857 return; 2858 2859 /* check in the RNR if the CSA aborted */ 2860 ieee80211_sta_other_link_csa_disappeared(link, 2861 full_elems); 2862 return; 2863 } 2864 } 2865 2866 /* no active CSA nor a new one */ 2867 if (res) { 2868 /* 2869 * However, we may have stopped queues when receiving a public 2870 * action frame that couldn't be protected, if it had the quiet 2871 * bit set. This is a trade-off, we want to be quiet as soon as 2872 * possible, but also don't trust the public action frame much, 2873 * as it can't be protected. 2874 */ 2875 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2876 link->u.mgd.csa.blocked_tx = false; 2877 ieee80211_vif_unblock_queues_csa(sdata); 2878 } 2879 return; 2880 } 2881 2882 /* 2883 * We don't really trust public action frames, but block queues (go to 2884 * quiet mode) for them anyway, we should get a beacon soon to either 2885 * know what the CSA really is, or figure out the public action frame 2886 * was actually an attack. 2887 */ 2888 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2889 if (csa_ie.mode) { 2890 link->u.mgd.csa.blocked_tx = true; 2891 ieee80211_vif_block_queues_csa(sdata); 2892 } 2893 return; 2894 } 2895 2896 if (link->conf->chanreq.oper.chan->band != 2897 csa_ie.chanreq.oper.chan->band) { 2898 link_info(link, 2899 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2900 link->u.mgd.bssid, 2901 csa_ie.chanreq.oper.chan->center_freq, 2902 csa_ie.chanreq.oper.width, 2903 csa_ie.chanreq.oper.center_freq1, 2904 csa_ie.chanreq.oper.center_freq2); 2905 goto drop_connection; 2906 } 2907 2908 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2909 IEEE80211_CHAN_DISABLED)) { 2910 link_info(link, 2911 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2912 link->u.mgd.bssid, 2913 csa_ie.chanreq.oper.chan->center_freq, 2914 csa_ie.chanreq.oper.chan->freq_offset, 2915 csa_ie.chanreq.oper.width, 2916 csa_ie.chanreq.oper.center_freq1, 2917 csa_ie.chanreq.oper.freq1_offset, 2918 csa_ie.chanreq.oper.center_freq2); 2919 goto drop_connection; 2920 } 2921 2922 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2923 &link->conf->chanreq.oper) && 2924 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2925 if (link->u.mgd.csa.ignored_same_chan) 2926 return; 2927 link_info(link, 2928 "AP %pM tries to chanswitch to same channel, ignore\n", 2929 link->u.mgd.bssid); 2930 link->u.mgd.csa.ignored_same_chan = true; 2931 return; 2932 } 2933 2934 /* 2935 * Drop all TDLS peers on the affected link - either we disconnect or 2936 * move to a different channel from this point on. There's no telling 2937 * what our peer will do. 2938 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2939 * have an incompatible wider chandef. 2940 */ 2941 ieee80211_teardown_tdls_peers(link); 2942 2943 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2944 lockdep_is_held(&local->hw.wiphy->mtx)); 2945 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2946 link_info(link, 2947 "no channel context assigned to vif?, disconnecting\n"); 2948 goto drop_connection; 2949 } 2950 2951 if (conf) 2952 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2953 2954 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2955 link_info(link, 2956 "driver doesn't support chan-switch with channel contexts\n"); 2957 goto drop_connection; 2958 } 2959 2960 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2961 link_info(link, 2962 "preparing for channel switch failed, disconnecting\n"); 2963 goto drop_connection; 2964 } 2965 2966 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2967 2968 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2969 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2970 &csa_ie.chanreq.ap); 2971 2972 if (chanctx) { 2973 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2974 chanctx->mode, false); 2975 if (res) { 2976 link_info(link, 2977 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2978 res); 2979 goto drop_connection; 2980 } 2981 } 2982 2983 link->conf->csa_active = true; 2984 link->u.mgd.csa.ignored_same_chan = false; 2985 link->u.mgd.beacon_crc_valid = false; 2986 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2987 2988 if (csa_ie.mode) 2989 ieee80211_vif_block_queues_csa(sdata); 2990 2991 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2992 link->link_id, csa_ie.count, 2993 csa_ie.mode); 2994 2995 /* we may have to handle timeout for deactivated link in software */ 2996 now = jiffies; 2997 link->u.mgd.csa.time = now + 2998 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2999 link->conf->beacon_int); 3000 3001 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3002 local->ops->channel_switch) { 3003 /* 3004 * Use driver's channel switch callback, the driver will 3005 * later call ieee80211_chswitch_done(). It may deactivate 3006 * the link as well, we handle that elsewhere and queue 3007 * the csa.switch_work for the calculated time then. 3008 */ 3009 drv_channel_switch(local, sdata, &ch_switch); 3010 return; 3011 } 3012 3013 /* channel switch handled in software */ 3014 wiphy_delayed_work_queue(local->hw.wiphy, 3015 &link->u.mgd.csa.switch_work, 3016 link->u.mgd.csa.time - now); 3017 return; 3018 drop_connection: 3019 /* 3020 * This is just so that the disconnect flow will know that 3021 * we were trying to switch channel and failed. In case the 3022 * mode is 1 (we are not allowed to Tx), we will know not to 3023 * send a deauthentication frame. Those two fields will be 3024 * reset when the disconnection worker runs. 3025 */ 3026 link->conf->csa_active = true; 3027 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3028 3029 wiphy_work_queue(sdata->local->hw.wiphy, 3030 &ifmgd->csa_connection_drop_work); 3031 } 3032 3033 struct sta_bss_param_ch_cnt_data { 3034 struct ieee80211_sub_if_data *sdata; 3035 u8 reporting_link_id; 3036 u8 mld_id; 3037 }; 3038 3039 static enum cfg80211_rnr_iter_ret 3040 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3041 const struct ieee80211_neighbor_ap_info *info, 3042 const u8 *tbtt_info, u8 tbtt_info_len) 3043 { 3044 struct sta_bss_param_ch_cnt_data *data = _data; 3045 struct ieee80211_sub_if_data *sdata = data->sdata; 3046 const struct ieee80211_tbtt_info_ge_11 *ti; 3047 u8 bss_param_ch_cnt; 3048 int link_id; 3049 3050 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3051 return RNR_ITER_CONTINUE; 3052 3053 if (tbtt_info_len < sizeof(*ti)) 3054 return RNR_ITER_CONTINUE; 3055 3056 ti = (const void *)tbtt_info; 3057 3058 if (ti->mld_params.mld_id != data->mld_id) 3059 return RNR_ITER_CONTINUE; 3060 3061 link_id = le16_get_bits(ti->mld_params.params, 3062 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3063 bss_param_ch_cnt = 3064 le16_get_bits(ti->mld_params.params, 3065 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3066 3067 if (bss_param_ch_cnt != 255 && 3068 link_id < ARRAY_SIZE(sdata->link)) { 3069 struct ieee80211_link_data *link = 3070 sdata_dereference(sdata->link[link_id], sdata); 3071 3072 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3073 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3074 link->conf->bss_param_ch_cnt_link_id = 3075 data->reporting_link_id; 3076 } 3077 } 3078 3079 return RNR_ITER_CONTINUE; 3080 } 3081 3082 static void 3083 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3084 struct ieee80211_bss_conf *bss_conf, 3085 struct ieee802_11_elems *elems) 3086 { 3087 struct sta_bss_param_ch_cnt_data data = { 3088 .reporting_link_id = bss_conf->link_id, 3089 .sdata = sdata, 3090 }; 3091 int bss_param_ch_cnt; 3092 3093 if (!elems->ml_basic) 3094 return; 3095 3096 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3097 3098 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3099 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3100 3101 bss_param_ch_cnt = 3102 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3103 3104 /* 3105 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3106 * didn't change to indicate that we got a beacon on our own 3107 * link. 3108 */ 3109 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3110 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3111 bss_conf->bss_param_ch_cnt_link_id = 3112 bss_conf->link_id; 3113 } 3114 } 3115 3116 static bool 3117 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3118 const u8 *country_ie, u8 country_ie_len, 3119 const u8 *pwr_constr_elem, 3120 int *chan_pwr, int *pwr_reduction) 3121 { 3122 struct ieee80211_country_ie_triplet *triplet; 3123 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3124 int i, chan_increment; 3125 bool have_chan_pwr = false; 3126 3127 /* Invalid IE */ 3128 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3129 return false; 3130 3131 triplet = (void *)(country_ie + 3); 3132 country_ie_len -= 3; 3133 3134 switch (channel->band) { 3135 default: 3136 WARN_ON_ONCE(1); 3137 fallthrough; 3138 case NL80211_BAND_2GHZ: 3139 case NL80211_BAND_60GHZ: 3140 case NL80211_BAND_LC: 3141 chan_increment = 1; 3142 break; 3143 case NL80211_BAND_5GHZ: 3144 chan_increment = 4; 3145 break; 3146 case NL80211_BAND_6GHZ: 3147 /* 3148 * In the 6 GHz band, the "maximum transmit power level" 3149 * field in the triplets is reserved, and thus will be 3150 * zero and we shouldn't use it to control TX power. 3151 * The actual TX power will be given in the transmit 3152 * power envelope element instead. 3153 */ 3154 return false; 3155 } 3156 3157 /* find channel */ 3158 while (country_ie_len >= 3) { 3159 u8 first_channel = triplet->chans.first_channel; 3160 3161 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3162 goto next; 3163 3164 for (i = 0; i < triplet->chans.num_channels; i++) { 3165 if (first_channel + i * chan_increment == chan) { 3166 have_chan_pwr = true; 3167 *chan_pwr = triplet->chans.max_power; 3168 break; 3169 } 3170 } 3171 if (have_chan_pwr) 3172 break; 3173 3174 next: 3175 triplet++; 3176 country_ie_len -= 3; 3177 } 3178 3179 if (have_chan_pwr && pwr_constr_elem) 3180 *pwr_reduction = *pwr_constr_elem; 3181 else 3182 *pwr_reduction = 0; 3183 3184 return have_chan_pwr; 3185 } 3186 3187 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3188 const u8 *cisco_dtpc_ie, 3189 int *pwr_level) 3190 { 3191 /* From practical testing, the first data byte of the DTPC element 3192 * seems to contain the requested dBm level, and the CLI on Cisco 3193 * APs clearly state the range is -127 to 127 dBm, which indicates 3194 * a signed byte, although it seemingly never actually goes negative. 3195 * The other byte seems to always be zero. 3196 */ 3197 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3198 } 3199 3200 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3201 struct ieee80211_channel *channel, 3202 struct ieee80211_mgmt *mgmt, 3203 const u8 *country_ie, u8 country_ie_len, 3204 const u8 *pwr_constr_ie, 3205 const u8 *cisco_dtpc_ie) 3206 { 3207 struct ieee80211_sub_if_data *sdata = link->sdata; 3208 bool has_80211h_pwr = false, has_cisco_pwr = false; 3209 int chan_pwr = 0, pwr_reduction_80211h = 0; 3210 int pwr_level_cisco, pwr_level_80211h; 3211 int new_ap_level; 3212 __le16 capab = mgmt->u.probe_resp.capab_info; 3213 3214 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3215 return 0; /* TODO */ 3216 3217 if (country_ie && 3218 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3219 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3220 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3221 channel, country_ie, country_ie_len, 3222 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3223 pwr_level_80211h = 3224 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3225 } 3226 3227 if (cisco_dtpc_ie) { 3228 ieee80211_find_cisco_dtpc( 3229 channel, cisco_dtpc_ie, &pwr_level_cisco); 3230 has_cisco_pwr = true; 3231 } 3232 3233 if (!has_80211h_pwr && !has_cisco_pwr) 3234 return 0; 3235 3236 /* If we have both 802.11h and Cisco DTPC, apply both limits 3237 * by picking the smallest of the two power levels advertised. 3238 */ 3239 if (has_80211h_pwr && 3240 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3241 new_ap_level = pwr_level_80211h; 3242 3243 if (link->ap_power_level == new_ap_level) 3244 return 0; 3245 3246 sdata_dbg(sdata, 3247 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3248 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3249 link->u.mgd.bssid); 3250 } else { /* has_cisco_pwr is always true here. */ 3251 new_ap_level = pwr_level_cisco; 3252 3253 if (link->ap_power_level == new_ap_level) 3254 return 0; 3255 3256 sdata_dbg(sdata, 3257 "Limiting TX power to %d dBm as advertised by %pM\n", 3258 pwr_level_cisco, link->u.mgd.bssid); 3259 } 3260 3261 link->ap_power_level = new_ap_level; 3262 if (__ieee80211_recalc_txpower(link)) 3263 return BSS_CHANGED_TXPOWER; 3264 return 0; 3265 } 3266 3267 /* powersave */ 3268 static void ieee80211_enable_ps(struct ieee80211_local *local, 3269 struct ieee80211_sub_if_data *sdata) 3270 { 3271 struct ieee80211_conf *conf = &local->hw.conf; 3272 3273 /* 3274 * If we are scanning right now then the parameters will 3275 * take effect when scan finishes. 3276 */ 3277 if (local->scanning) 3278 return; 3279 3280 if (conf->dynamic_ps_timeout > 0 && 3281 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3282 mod_timer(&local->dynamic_ps_timer, jiffies + 3283 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3284 } else { 3285 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3286 ieee80211_send_nullfunc(local, sdata, true); 3287 3288 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3289 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3290 return; 3291 3292 conf->flags |= IEEE80211_CONF_PS; 3293 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3294 } 3295 } 3296 3297 static void ieee80211_change_ps(struct ieee80211_local *local) 3298 { 3299 struct ieee80211_conf *conf = &local->hw.conf; 3300 3301 if (local->ps_sdata) { 3302 ieee80211_enable_ps(local, local->ps_sdata); 3303 } else if (conf->flags & IEEE80211_CONF_PS) { 3304 conf->flags &= ~IEEE80211_CONF_PS; 3305 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3306 timer_delete_sync(&local->dynamic_ps_timer); 3307 wiphy_work_cancel(local->hw.wiphy, 3308 &local->dynamic_ps_enable_work); 3309 } 3310 } 3311 3312 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3313 { 3314 struct ieee80211_local *local = sdata->local; 3315 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3316 struct sta_info *sta = NULL; 3317 bool authorized = false; 3318 3319 if (!mgd->powersave) 3320 return false; 3321 3322 if (mgd->broken_ap) 3323 return false; 3324 3325 if (!mgd->associated) 3326 return false; 3327 3328 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3329 return false; 3330 3331 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3332 !sdata->deflink.u.mgd.have_beacon) 3333 return false; 3334 3335 rcu_read_lock(); 3336 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3337 if (sta) 3338 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3339 rcu_read_unlock(); 3340 3341 return authorized; 3342 } 3343 3344 /* need to hold RTNL or interface lock */ 3345 void ieee80211_recalc_ps(struct ieee80211_local *local) 3346 { 3347 struct ieee80211_sub_if_data *sdata, *found = NULL; 3348 int count = 0; 3349 int timeout; 3350 3351 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3352 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3353 local->ps_sdata = NULL; 3354 return; 3355 } 3356 3357 list_for_each_entry(sdata, &local->interfaces, list) { 3358 if (!ieee80211_sdata_running(sdata)) 3359 continue; 3360 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3361 /* If an AP vif is found, then disable PS 3362 * by setting the count to zero thereby setting 3363 * ps_sdata to NULL. 3364 */ 3365 count = 0; 3366 break; 3367 } 3368 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3369 continue; 3370 found = sdata; 3371 count++; 3372 } 3373 3374 if (count == 1 && ieee80211_powersave_allowed(found)) { 3375 u8 dtimper = found->deflink.u.mgd.dtim_period; 3376 3377 timeout = local->dynamic_ps_forced_timeout; 3378 if (timeout < 0) 3379 timeout = 100; 3380 local->hw.conf.dynamic_ps_timeout = timeout; 3381 3382 /* If the TIM IE is invalid, pretend the value is 1 */ 3383 if (!dtimper) 3384 dtimper = 1; 3385 3386 local->hw.conf.ps_dtim_period = dtimper; 3387 local->ps_sdata = found; 3388 } else { 3389 local->ps_sdata = NULL; 3390 } 3391 3392 ieee80211_change_ps(local); 3393 } 3394 3395 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3396 { 3397 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3398 3399 if (sdata->vif.cfg.ps != ps_allowed) { 3400 sdata->vif.cfg.ps = ps_allowed; 3401 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3402 } 3403 } 3404 3405 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3406 struct wiphy_work *work) 3407 { 3408 struct ieee80211_local *local = 3409 container_of(work, struct ieee80211_local, 3410 dynamic_ps_disable_work); 3411 3412 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3413 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3414 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3415 } 3416 3417 ieee80211_wake_queues_by_reason(&local->hw, 3418 IEEE80211_MAX_QUEUE_MAP, 3419 IEEE80211_QUEUE_STOP_REASON_PS, 3420 false); 3421 } 3422 3423 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3424 struct wiphy_work *work) 3425 { 3426 struct ieee80211_local *local = 3427 container_of(work, struct ieee80211_local, 3428 dynamic_ps_enable_work); 3429 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3430 struct ieee80211_if_managed *ifmgd; 3431 unsigned long flags; 3432 int q; 3433 3434 /* can only happen when PS was just disabled anyway */ 3435 if (!sdata) 3436 return; 3437 3438 ifmgd = &sdata->u.mgd; 3439 3440 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3441 return; 3442 3443 if (local->hw.conf.dynamic_ps_timeout > 0) { 3444 /* don't enter PS if TX frames are pending */ 3445 if (drv_tx_frames_pending(local)) { 3446 mod_timer(&local->dynamic_ps_timer, jiffies + 3447 msecs_to_jiffies( 3448 local->hw.conf.dynamic_ps_timeout)); 3449 return; 3450 } 3451 3452 /* 3453 * transmission can be stopped by others which leads to 3454 * dynamic_ps_timer expiry. Postpone the ps timer if it 3455 * is not the actual idle state. 3456 */ 3457 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3458 for (q = 0; q < local->hw.queues; q++) { 3459 if (local->queue_stop_reasons[q]) { 3460 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3461 flags); 3462 mod_timer(&local->dynamic_ps_timer, jiffies + 3463 msecs_to_jiffies( 3464 local->hw.conf.dynamic_ps_timeout)); 3465 return; 3466 } 3467 } 3468 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3469 } 3470 3471 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3472 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3473 if (drv_tx_frames_pending(local)) { 3474 mod_timer(&local->dynamic_ps_timer, jiffies + 3475 msecs_to_jiffies( 3476 local->hw.conf.dynamic_ps_timeout)); 3477 } else { 3478 ieee80211_send_nullfunc(local, sdata, true); 3479 /* Flush to get the tx status of nullfunc frame */ 3480 ieee80211_flush_queues(local, sdata, false); 3481 } 3482 } 3483 3484 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3485 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3486 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3487 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3488 local->hw.conf.flags |= IEEE80211_CONF_PS; 3489 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3490 } 3491 } 3492 3493 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3494 { 3495 struct ieee80211_local *local = timer_container_of(local, t, 3496 dynamic_ps_timer); 3497 3498 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3499 } 3500 3501 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3502 { 3503 struct ieee80211_link_data *link = 3504 container_of(work, struct ieee80211_link_data, 3505 dfs_cac_timer_work.work); 3506 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3507 struct ieee80211_sub_if_data *sdata = link->sdata; 3508 3509 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3510 3511 if (sdata->wdev.links[link->link_id].cac_started) { 3512 ieee80211_link_release_channel(link); 3513 cfg80211_cac_event(sdata->dev, &chandef, 3514 NL80211_RADAR_CAC_FINISHED, 3515 GFP_KERNEL, link->link_id); 3516 } 3517 } 3518 3519 static bool 3520 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3521 { 3522 struct ieee80211_local *local = sdata->local; 3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3524 bool ret = false; 3525 int ac; 3526 3527 if (local->hw.queues < IEEE80211_NUM_ACS) 3528 return false; 3529 3530 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3531 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3532 int non_acm_ac; 3533 unsigned long now = jiffies; 3534 3535 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3536 tx_tspec->admitted_time && 3537 time_after(now, tx_tspec->time_slice_start + HZ)) { 3538 tx_tspec->consumed_tx_time = 0; 3539 tx_tspec->time_slice_start = now; 3540 3541 if (tx_tspec->downgraded) 3542 tx_tspec->action = 3543 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3544 } 3545 3546 switch (tx_tspec->action) { 3547 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3548 /* take the original parameters */ 3549 if (drv_conf_tx(local, &sdata->deflink, ac, 3550 &sdata->deflink.tx_conf[ac])) 3551 link_err(&sdata->deflink, 3552 "failed to set TX queue parameters for queue %d\n", 3553 ac); 3554 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3555 tx_tspec->downgraded = false; 3556 ret = true; 3557 break; 3558 case TX_TSPEC_ACTION_DOWNGRADE: 3559 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3560 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3561 ret = true; 3562 break; 3563 } 3564 /* downgrade next lower non-ACM AC */ 3565 for (non_acm_ac = ac + 1; 3566 non_acm_ac < IEEE80211_NUM_ACS; 3567 non_acm_ac++) 3568 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3569 break; 3570 /* Usually the loop will result in using BK even if it 3571 * requires admission control, but such a configuration 3572 * makes no sense and we have to transmit somehow - the 3573 * AC selection does the same thing. 3574 * If we started out trying to downgrade from BK, then 3575 * the extra condition here might be needed. 3576 */ 3577 if (non_acm_ac >= IEEE80211_NUM_ACS) 3578 non_acm_ac = IEEE80211_AC_BK; 3579 if (drv_conf_tx(local, &sdata->deflink, ac, 3580 &sdata->deflink.tx_conf[non_acm_ac])) 3581 link_err(&sdata->deflink, 3582 "failed to set TX queue parameters for queue %d\n", 3583 ac); 3584 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3585 ret = true; 3586 wiphy_delayed_work_queue(local->hw.wiphy, 3587 &ifmgd->tx_tspec_wk, 3588 tx_tspec->time_slice_start + 3589 HZ - now + 1); 3590 break; 3591 case TX_TSPEC_ACTION_NONE: 3592 /* nothing now */ 3593 break; 3594 } 3595 } 3596 3597 return ret; 3598 } 3599 3600 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3601 { 3602 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3603 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3604 BSS_CHANGED_QOS); 3605 } 3606 3607 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3608 struct wiphy_work *work) 3609 { 3610 struct ieee80211_sub_if_data *sdata; 3611 3612 sdata = container_of(work, struct ieee80211_sub_if_data, 3613 u.mgd.tx_tspec_wk.work); 3614 ieee80211_sta_handle_tspec_ac_params(sdata); 3615 } 3616 3617 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3618 { 3619 struct ieee80211_sub_if_data *sdata = link->sdata; 3620 struct ieee80211_local *local = sdata->local; 3621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3622 struct ieee80211_tx_queue_params *params = link->tx_conf; 3623 u8 ac; 3624 3625 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3626 mlme_dbg(sdata, 3627 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3628 ac, params[ac].acm, 3629 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3630 params[ac].txop, params[ac].uapsd, 3631 ifmgd->tx_tspec[ac].downgraded); 3632 if (!ifmgd->tx_tspec[ac].downgraded && 3633 drv_conf_tx(local, link, ac, ¶ms[ac])) 3634 link_err(link, 3635 "failed to set TX queue parameters for AC %d\n", 3636 ac); 3637 } 3638 } 3639 3640 /* MLME */ 3641 static bool 3642 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3643 struct ieee80211_link_data *link, 3644 const u8 *wmm_param, size_t wmm_param_len, 3645 const struct ieee80211_mu_edca_param_set *mu_edca) 3646 { 3647 struct ieee80211_sub_if_data *sdata = link->sdata; 3648 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3650 size_t left; 3651 int count, mu_edca_count, ac; 3652 const u8 *pos; 3653 u8 uapsd_queues = 0; 3654 3655 if (!local->ops->conf_tx) 3656 return false; 3657 3658 if (local->hw.queues < IEEE80211_NUM_ACS) 3659 return false; 3660 3661 if (!wmm_param) 3662 return false; 3663 3664 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3665 return false; 3666 3667 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3668 uapsd_queues = ifmgd->uapsd_queues; 3669 3670 count = wmm_param[6] & 0x0f; 3671 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3672 * if mu_edca was preset before and now it disappeared tell 3673 * the driver about it. 3674 */ 3675 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3676 if (count == link->u.mgd.wmm_last_param_set && 3677 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3678 return false; 3679 link->u.mgd.wmm_last_param_set = count; 3680 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3681 3682 pos = wmm_param + 8; 3683 left = wmm_param_len - 8; 3684 3685 memset(¶ms, 0, sizeof(params)); 3686 3687 sdata->wmm_acm = 0; 3688 for (; left >= 4; left -= 4, pos += 4) { 3689 int aci = (pos[0] >> 5) & 0x03; 3690 int acm = (pos[0] >> 4) & 0x01; 3691 bool uapsd = false; 3692 3693 switch (aci) { 3694 case 1: /* AC_BK */ 3695 ac = IEEE80211_AC_BK; 3696 if (acm) 3697 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3698 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3699 uapsd = true; 3700 params[ac].mu_edca = !!mu_edca; 3701 if (mu_edca) 3702 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3703 break; 3704 case 2: /* AC_VI */ 3705 ac = IEEE80211_AC_VI; 3706 if (acm) 3707 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3708 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3709 uapsd = true; 3710 params[ac].mu_edca = !!mu_edca; 3711 if (mu_edca) 3712 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3713 break; 3714 case 3: /* AC_VO */ 3715 ac = IEEE80211_AC_VO; 3716 if (acm) 3717 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3718 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3719 uapsd = true; 3720 params[ac].mu_edca = !!mu_edca; 3721 if (mu_edca) 3722 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3723 break; 3724 case 0: /* AC_BE */ 3725 default: 3726 ac = IEEE80211_AC_BE; 3727 if (acm) 3728 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3729 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3730 uapsd = true; 3731 params[ac].mu_edca = !!mu_edca; 3732 if (mu_edca) 3733 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3734 break; 3735 } 3736 3737 params[ac].aifs = pos[0] & 0x0f; 3738 3739 if (params[ac].aifs < 2) { 3740 link_info(link, 3741 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3742 params[ac].aifs, aci); 3743 params[ac].aifs = 2; 3744 } 3745 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3746 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3747 params[ac].txop = get_unaligned_le16(pos + 2); 3748 params[ac].acm = acm; 3749 params[ac].uapsd = uapsd; 3750 3751 if (params[ac].cw_min == 0 || 3752 params[ac].cw_min > params[ac].cw_max) { 3753 link_info(link, 3754 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3755 params[ac].cw_min, params[ac].cw_max, aci); 3756 return false; 3757 } 3758 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3759 } 3760 3761 /* WMM specification requires all 4 ACIs. */ 3762 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3763 if (params[ac].cw_min == 0) { 3764 link_info(link, 3765 "AP has invalid WMM params (missing AC %d), using defaults\n", 3766 ac); 3767 return false; 3768 } 3769 } 3770 3771 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3772 link->tx_conf[ac] = params[ac]; 3773 3774 return true; 3775 } 3776 3777 static bool 3778 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3779 struct ieee80211_link_data *link, 3780 const u8 *wmm_param, size_t wmm_param_len, 3781 const struct ieee80211_mu_edca_param_set *mu_edca) 3782 { 3783 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3784 mu_edca)) 3785 return false; 3786 3787 ieee80211_mgd_set_link_qos_params(link); 3788 3789 /* enable WMM or activate new settings */ 3790 link->conf->qos = true; 3791 return true; 3792 } 3793 3794 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3795 { 3796 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3797 3798 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3799 ieee80211_run_deferred_scan(sdata->local); 3800 } 3801 3802 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3803 { 3804 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3805 3806 __ieee80211_stop_poll(sdata); 3807 } 3808 3809 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3810 u16 capab, bool erp_valid, u8 erp) 3811 { 3812 struct ieee80211_bss_conf *bss_conf = link->conf; 3813 struct ieee80211_supported_band *sband; 3814 u64 changed = 0; 3815 bool use_protection; 3816 bool use_short_preamble; 3817 bool use_short_slot; 3818 3819 sband = ieee80211_get_link_sband(link); 3820 if (!sband) 3821 return changed; 3822 3823 if (erp_valid) { 3824 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3825 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3826 } else { 3827 use_protection = false; 3828 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3829 } 3830 3831 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3832 if (sband->band == NL80211_BAND_5GHZ || 3833 sband->band == NL80211_BAND_6GHZ) 3834 use_short_slot = true; 3835 3836 if (use_protection != bss_conf->use_cts_prot) { 3837 bss_conf->use_cts_prot = use_protection; 3838 changed |= BSS_CHANGED_ERP_CTS_PROT; 3839 } 3840 3841 if (use_short_preamble != bss_conf->use_short_preamble) { 3842 bss_conf->use_short_preamble = use_short_preamble; 3843 changed |= BSS_CHANGED_ERP_PREAMBLE; 3844 } 3845 3846 if (use_short_slot != bss_conf->use_short_slot) { 3847 bss_conf->use_short_slot = use_short_slot; 3848 changed |= BSS_CHANGED_ERP_SLOT; 3849 } 3850 3851 return changed; 3852 } 3853 3854 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3855 struct cfg80211_bss *cbss) 3856 { 3857 struct ieee80211_sub_if_data *sdata = link->sdata; 3858 struct ieee80211_bss_conf *bss_conf = link->conf; 3859 struct ieee80211_bss *bss = (void *)cbss->priv; 3860 u64 changed = BSS_CHANGED_QOS; 3861 3862 /* not really used in MLO */ 3863 sdata->u.mgd.beacon_timeout = 3864 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3865 bss_conf->beacon_int)); 3866 3867 changed |= ieee80211_handle_bss_capability(link, 3868 bss_conf->assoc_capability, 3869 bss->has_erp_value, 3870 bss->erp_value); 3871 3872 ieee80211_check_rate_mask(link); 3873 3874 link->conf->bss = cbss; 3875 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3876 3877 if (sdata->vif.p2p || 3878 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3879 const struct cfg80211_bss_ies *ies; 3880 3881 rcu_read_lock(); 3882 ies = rcu_dereference(cbss->ies); 3883 if (ies) { 3884 int ret; 3885 3886 ret = cfg80211_get_p2p_attr( 3887 ies->data, ies->len, 3888 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3889 (u8 *) &bss_conf->p2p_noa_attr, 3890 sizeof(bss_conf->p2p_noa_attr)); 3891 if (ret >= 2) { 3892 link->u.mgd.p2p_noa_index = 3893 bss_conf->p2p_noa_attr.index; 3894 changed |= BSS_CHANGED_P2P_PS; 3895 } 3896 } 3897 rcu_read_unlock(); 3898 } 3899 3900 if (link->u.mgd.have_beacon) { 3901 bss_conf->beacon_rate = bss->beacon_rate; 3902 changed |= BSS_CHANGED_BEACON_INFO; 3903 } else { 3904 bss_conf->beacon_rate = NULL; 3905 } 3906 3907 /* Tell the driver to monitor connection quality (if supported) */ 3908 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3909 bss_conf->cqm_rssi_thold) 3910 changed |= BSS_CHANGED_CQM; 3911 3912 return changed; 3913 } 3914 3915 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3916 struct ieee80211_mgd_assoc_data *assoc_data, 3917 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3918 { 3919 struct ieee80211_local *local = sdata->local; 3920 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3921 u64 vif_changed = BSS_CHANGED_ASSOC; 3922 unsigned int link_id; 3923 3924 lockdep_assert_wiphy(local->hw.wiphy); 3925 3926 sdata->u.mgd.associated = true; 3927 3928 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3929 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3930 struct ieee80211_link_data *link; 3931 3932 if (!cbss || 3933 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3934 continue; 3935 3936 if (ieee80211_vif_is_mld(&sdata->vif) && 3937 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3938 continue; 3939 3940 link = sdata_dereference(sdata->link[link_id], sdata); 3941 if (WARN_ON(!link)) 3942 return; 3943 3944 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3945 } 3946 3947 /* just to be sure */ 3948 ieee80211_stop_poll(sdata); 3949 3950 ieee80211_led_assoc(local, 1); 3951 3952 vif_cfg->assoc = 1; 3953 3954 /* Enable ARP filtering */ 3955 if (vif_cfg->arp_addr_cnt) 3956 vif_changed |= BSS_CHANGED_ARP_FILTER; 3957 3958 if (ieee80211_vif_is_mld(&sdata->vif)) { 3959 for (link_id = 0; 3960 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3961 link_id++) { 3962 struct ieee80211_link_data *link; 3963 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3964 3965 if (!cbss || 3966 !(BIT(link_id) & 3967 ieee80211_vif_usable_links(&sdata->vif)) || 3968 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3969 continue; 3970 3971 link = sdata_dereference(sdata->link[link_id], sdata); 3972 if (WARN_ON(!link)) 3973 return; 3974 3975 ieee80211_link_info_change_notify(sdata, link, 3976 changed[link_id]); 3977 3978 ieee80211_recalc_smps(sdata, link); 3979 } 3980 3981 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3982 } else { 3983 ieee80211_bss_info_change_notify(sdata, 3984 vif_changed | changed[0]); 3985 } 3986 3987 ieee80211_recalc_ps(local); 3988 3989 /* leave this here to not change ordering in non-MLO cases */ 3990 if (!ieee80211_vif_is_mld(&sdata->vif)) 3991 ieee80211_recalc_smps(sdata, &sdata->deflink); 3992 ieee80211_recalc_ps_vif(sdata); 3993 3994 netif_carrier_on(sdata->dev); 3995 } 3996 3997 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3998 { 3999 struct ieee80211_mgd_assoc_data *add_links_data = 4000 sdata->u.mgd.reconf.add_links_data; 4001 4002 if (!ieee80211_vif_is_mld(&sdata->vif) || 4003 !(sdata->u.mgd.reconf.added_links | 4004 sdata->u.mgd.reconf.removed_links)) 4005 return; 4006 4007 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4008 &sdata->u.mgd.reconf.wk); 4009 sdata->u.mgd.reconf.added_links = 0; 4010 sdata->u.mgd.reconf.removed_links = 0; 4011 sdata->u.mgd.reconf.dialog_token = 0; 4012 4013 if (add_links_data) { 4014 struct cfg80211_mlo_reconf_done_data done_data = {}; 4015 u8 link_id; 4016 4017 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4018 link_id++) 4019 done_data.links[link_id].bss = 4020 add_links_data->link[link_id].bss; 4021 4022 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4023 4024 kfree(sdata->u.mgd.reconf.add_links_data); 4025 sdata->u.mgd.reconf.add_links_data = NULL; 4026 } 4027 } 4028 4029 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4030 u16 stype, u16 reason, bool tx, 4031 u8 *frame_buf) 4032 { 4033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4034 struct ieee80211_local *local = sdata->local; 4035 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4036 unsigned int link_id; 4037 u64 changed = 0; 4038 struct ieee80211_prep_tx_info info = { 4039 .subtype = stype, 4040 .was_assoc = true, 4041 .link_id = ffs(sdata->vif.active_links) - 1, 4042 }; 4043 4044 lockdep_assert_wiphy(local->hw.wiphy); 4045 4046 if (frame_buf) 4047 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4048 4049 if (WARN_ON(!ap_sta)) 4050 return; 4051 4052 if (WARN_ON_ONCE(tx && !frame_buf)) 4053 return; 4054 4055 if (WARN_ON(!ifmgd->associated)) 4056 return; 4057 4058 ieee80211_stop_poll(sdata); 4059 4060 ifmgd->associated = false; 4061 4062 if (tx) { 4063 bool tx_link_found = false; 4064 4065 for (link_id = 0; 4066 link_id < ARRAY_SIZE(sdata->link); 4067 link_id++) { 4068 struct ieee80211_link_data *link; 4069 4070 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4071 continue; 4072 4073 link = sdata_dereference(sdata->link[link_id], sdata); 4074 if (WARN_ON_ONCE(!link)) 4075 continue; 4076 4077 if (link->u.mgd.csa.blocked_tx) 4078 continue; 4079 4080 tx_link_found = true; 4081 break; 4082 } 4083 4084 tx = tx_link_found; 4085 } 4086 4087 /* other links will be destroyed */ 4088 sdata->deflink.conf->bss = NULL; 4089 sdata->deflink.conf->epcs_support = false; 4090 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4091 4092 netif_carrier_off(sdata->dev); 4093 4094 /* 4095 * if we want to get out of ps before disassoc (why?) we have 4096 * to do it before sending disassoc, as otherwise the null-packet 4097 * won't be valid. 4098 */ 4099 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4100 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4101 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4102 } 4103 local->ps_sdata = NULL; 4104 4105 /* disable per-vif ps */ 4106 ieee80211_recalc_ps_vif(sdata); 4107 4108 /* make sure ongoing transmission finishes */ 4109 synchronize_net(); 4110 4111 /* 4112 * drop any frame before deauth/disassoc, this can be data or 4113 * management frame. Since we are disconnecting, we should not 4114 * insist sending these frames which can take time and delay 4115 * the disconnection and possible the roaming. 4116 */ 4117 ieee80211_flush_queues(local, sdata, true); 4118 4119 if (tx) { 4120 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4121 4122 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4123 sdata->vif.cfg.ap_addr, stype, 4124 reason, true, frame_buf); 4125 4126 /* flush out frame - make sure the deauth was actually sent */ 4127 ieee80211_flush_queues(local, sdata, false); 4128 4129 drv_mgd_complete_tx(sdata->local, sdata, &info); 4130 } else if (frame_buf) { 4131 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4132 sdata->vif.cfg.ap_addr, stype, 4133 reason, false, frame_buf); 4134 } 4135 4136 /* clear AP addr only after building the needed mgmt frames */ 4137 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4138 eth_zero_addr(sdata->vif.cfg.ap_addr); 4139 4140 sdata->vif.cfg.ssid_len = 0; 4141 4142 /* Remove TDLS peers */ 4143 __sta_info_flush(sdata, false, -1, ap_sta); 4144 4145 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4146 /* Only move the AP state */ 4147 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4148 } else { 4149 /* Remove AP peer */ 4150 sta_info_flush(sdata, -1); 4151 } 4152 4153 /* finally reset all BSS / config parameters */ 4154 if (!ieee80211_vif_is_mld(&sdata->vif)) 4155 changed |= ieee80211_reset_erp_info(sdata); 4156 4157 ieee80211_led_assoc(local, 0); 4158 changed |= BSS_CHANGED_ASSOC; 4159 sdata->vif.cfg.assoc = false; 4160 4161 sdata->deflink.u.mgd.p2p_noa_index = -1; 4162 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4163 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4164 4165 /* on the next assoc, re-program HT/VHT parameters */ 4166 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4167 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4168 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4169 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4170 4171 /* 4172 * reset MU-MIMO ownership and group data in default link, 4173 * if used, other links are destroyed 4174 */ 4175 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4176 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4177 memset(sdata->vif.bss_conf.mu_group.position, 0, 4178 sizeof(sdata->vif.bss_conf.mu_group.position)); 4179 if (!ieee80211_vif_is_mld(&sdata->vif)) 4180 changed |= BSS_CHANGED_MU_GROUPS; 4181 sdata->vif.bss_conf.mu_mimo_owner = false; 4182 4183 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4184 4185 timer_delete_sync(&local->dynamic_ps_timer); 4186 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4187 4188 /* Disable ARP filtering */ 4189 if (sdata->vif.cfg.arp_addr_cnt) 4190 changed |= BSS_CHANGED_ARP_FILTER; 4191 4192 sdata->vif.bss_conf.qos = false; 4193 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4194 changed |= BSS_CHANGED_QOS; 4195 /* The BSSID (not really interesting) and HT changed */ 4196 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4197 ieee80211_bss_info_change_notify(sdata, changed); 4198 } else { 4199 ieee80211_vif_cfg_change_notify(sdata, changed); 4200 } 4201 4202 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4203 /* 4204 * After notifying the driver about the disassoc, 4205 * remove the ap sta. 4206 */ 4207 sta_info_flush(sdata, -1); 4208 } 4209 4210 /* disassociated - set to defaults now */ 4211 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4212 4213 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4214 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4215 timer_delete_sync(&sdata->u.mgd.timer); 4216 4217 sdata->vif.bss_conf.dtim_period = 0; 4218 sdata->vif.bss_conf.beacon_rate = NULL; 4219 4220 sdata->deflink.u.mgd.have_beacon = false; 4221 sdata->deflink.u.mgd.tracking_signal_avg = false; 4222 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4223 4224 ifmgd->flags = 0; 4225 4226 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4227 struct ieee80211_link_data *link; 4228 4229 link = sdata_dereference(sdata->link[link_id], sdata); 4230 if (!link) 4231 continue; 4232 ieee80211_link_release_channel(link); 4233 } 4234 4235 sdata->vif.bss_conf.csa_active = false; 4236 sdata->deflink.u.mgd.csa.blocked_tx = false; 4237 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4238 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4239 ieee80211_vif_unblock_queues_csa(sdata); 4240 4241 /* existing TX TSPEC sessions no longer exist */ 4242 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4243 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4244 4245 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4246 sdata->vif.bss_conf.pwr_reduction = 0; 4247 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4248 4249 sdata->vif.cfg.eml_cap = 0; 4250 sdata->vif.cfg.eml_med_sync_delay = 0; 4251 sdata->vif.cfg.mld_capa_op = 0; 4252 4253 memset(&sdata->u.mgd.ttlm_info, 0, 4254 sizeof(sdata->u.mgd.ttlm_info)); 4255 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4256 4257 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4258 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4259 &ifmgd->neg_ttlm_timeout_work); 4260 4261 sdata->u.mgd.removed_links = 0; 4262 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4263 &sdata->u.mgd.ml_reconf_work); 4264 4265 wiphy_work_cancel(sdata->local->hw.wiphy, 4266 &ifmgd->teardown_ttlm_work); 4267 4268 /* if disconnection happens in the middle of the ML reconfiguration 4269 * flow, cfg80211 must called to release the BSS references obtained 4270 * when the flow started. 4271 */ 4272 ieee80211_ml_reconf_reset(sdata); 4273 4274 ieee80211_vif_set_links(sdata, 0, 0); 4275 4276 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4277 4278 ifmgd->epcs.enabled = false; 4279 ifmgd->epcs.dialog_token = 0; 4280 4281 memset(ifmgd->userspace_selectors, 0, 4282 sizeof(ifmgd->userspace_selectors)); 4283 } 4284 4285 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4286 { 4287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4288 struct ieee80211_local *local = sdata->local; 4289 4290 lockdep_assert_wiphy(local->hw.wiphy); 4291 4292 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4293 return; 4294 4295 __ieee80211_stop_poll(sdata); 4296 4297 ieee80211_recalc_ps(local); 4298 4299 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4300 return; 4301 4302 /* 4303 * We've received a probe response, but are not sure whether 4304 * we have or will be receiving any beacons or data, so let's 4305 * schedule the timers again, just in case. 4306 */ 4307 ieee80211_sta_reset_beacon_monitor(sdata); 4308 4309 mod_timer(&ifmgd->conn_mon_timer, 4310 round_jiffies_up(jiffies + 4311 IEEE80211_CONNECTION_IDLE_TIME)); 4312 } 4313 4314 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4315 struct ieee80211_hdr *hdr, 4316 u16 tx_time) 4317 { 4318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4319 u16 tid; 4320 int ac; 4321 struct ieee80211_sta_tx_tspec *tx_tspec; 4322 unsigned long now = jiffies; 4323 4324 if (!ieee80211_is_data_qos(hdr->frame_control)) 4325 return; 4326 4327 tid = ieee80211_get_tid(hdr); 4328 ac = ieee80211_ac_from_tid(tid); 4329 tx_tspec = &ifmgd->tx_tspec[ac]; 4330 4331 if (likely(!tx_tspec->admitted_time)) 4332 return; 4333 4334 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4335 tx_tspec->consumed_tx_time = 0; 4336 tx_tspec->time_slice_start = now; 4337 4338 if (tx_tspec->downgraded) { 4339 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4340 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4341 &ifmgd->tx_tspec_wk, 0); 4342 } 4343 } 4344 4345 if (tx_tspec->downgraded) 4346 return; 4347 4348 tx_tspec->consumed_tx_time += tx_time; 4349 4350 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4351 tx_tspec->downgraded = true; 4352 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4353 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4354 &ifmgd->tx_tspec_wk, 0); 4355 } 4356 } 4357 4358 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4359 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4360 { 4361 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4362 4363 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4364 !sdata->u.mgd.probe_send_count) 4365 return; 4366 4367 if (ack) 4368 sdata->u.mgd.probe_send_count = 0; 4369 else 4370 sdata->u.mgd.nullfunc_failed = true; 4371 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4372 } 4373 4374 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4375 const u8 *src, const u8 *dst, 4376 const u8 *ssid, size_t ssid_len, 4377 struct ieee80211_channel *channel) 4378 { 4379 struct sk_buff *skb; 4380 4381 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4382 ssid, ssid_len, NULL, 0, 4383 IEEE80211_PROBE_FLAG_DIRECTED); 4384 if (skb) 4385 ieee80211_tx_skb(sdata, skb); 4386 } 4387 4388 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4389 { 4390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4391 u8 *dst = sdata->vif.cfg.ap_addr; 4392 u8 unicast_limit = max(1, max_probe_tries - 3); 4393 struct sta_info *sta; 4394 4395 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4396 4397 /* 4398 * Try sending broadcast probe requests for the last three 4399 * probe requests after the first ones failed since some 4400 * buggy APs only support broadcast probe requests. 4401 */ 4402 if (ifmgd->probe_send_count >= unicast_limit) 4403 dst = NULL; 4404 4405 /* 4406 * When the hardware reports an accurate Tx ACK status, it's 4407 * better to send a nullfunc frame instead of a probe request, 4408 * as it will kick us off the AP quickly if we aren't associated 4409 * anymore. The timeout will be reset if the frame is ACKed by 4410 * the AP. 4411 */ 4412 ifmgd->probe_send_count++; 4413 4414 if (dst) { 4415 sta = sta_info_get(sdata, dst); 4416 if (!WARN_ON(!sta)) 4417 ieee80211_check_fast_rx(sta); 4418 } 4419 4420 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4421 ifmgd->nullfunc_failed = false; 4422 ieee80211_send_nullfunc(sdata->local, sdata, false); 4423 } else { 4424 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4425 sdata->vif.cfg.ssid, 4426 sdata->vif.cfg.ssid_len, 4427 sdata->deflink.conf->bss->channel); 4428 } 4429 4430 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4431 run_again(sdata, ifmgd->probe_timeout); 4432 } 4433 4434 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4435 bool beacon) 4436 { 4437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4438 bool already = false; 4439 4440 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4441 4442 if (!ieee80211_sdata_running(sdata)) 4443 return; 4444 4445 if (!ifmgd->associated) 4446 return; 4447 4448 if (sdata->local->tmp_channel || sdata->local->scanning) 4449 return; 4450 4451 if (sdata->local->suspending) { 4452 /* reschedule after resume */ 4453 ieee80211_reset_ap_probe(sdata); 4454 return; 4455 } 4456 4457 if (beacon) { 4458 mlme_dbg_ratelimited(sdata, 4459 "detected beacon loss from AP (missed %d beacons) - probing\n", 4460 beacon_loss_count); 4461 4462 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4463 } 4464 4465 /* 4466 * The driver/our work has already reported this event or the 4467 * connection monitoring has kicked in and we have already sent 4468 * a probe request. Or maybe the AP died and the driver keeps 4469 * reporting until we disassociate... 4470 * 4471 * In either case we have to ignore the current call to this 4472 * function (except for setting the correct probe reason bit) 4473 * because otherwise we would reset the timer every time and 4474 * never check whether we received a probe response! 4475 */ 4476 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4477 already = true; 4478 4479 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4480 4481 if (already) 4482 return; 4483 4484 ieee80211_recalc_ps(sdata->local); 4485 4486 ifmgd->probe_send_count = 0; 4487 ieee80211_mgd_probe_ap_send(sdata); 4488 } 4489 4490 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4491 struct ieee80211_vif *vif) 4492 { 4493 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4495 struct cfg80211_bss *cbss; 4496 struct sk_buff *skb; 4497 const struct element *ssid; 4498 int ssid_len; 4499 4500 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4501 4502 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4503 ieee80211_vif_is_mld(&sdata->vif))) 4504 return NULL; 4505 4506 if (ifmgd->associated) 4507 cbss = sdata->deflink.conf->bss; 4508 else if (ifmgd->auth_data) 4509 cbss = ifmgd->auth_data->bss; 4510 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4511 cbss = ifmgd->assoc_data->link[0].bss; 4512 else 4513 return NULL; 4514 4515 rcu_read_lock(); 4516 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4517 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4518 "invalid SSID element (len=%d)", 4519 ssid ? ssid->datalen : -1)) 4520 ssid_len = 0; 4521 else 4522 ssid_len = ssid->datalen; 4523 4524 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4525 (u32) -1, cbss->channel, 4526 ssid->data, ssid_len, 4527 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4528 rcu_read_unlock(); 4529 4530 return skb; 4531 } 4532 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4533 4534 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4535 const u8 *buf, size_t len, bool tx, 4536 u16 reason, bool reconnect) 4537 { 4538 struct ieee80211_event event = { 4539 .type = MLME_EVENT, 4540 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4541 .u.mlme.reason = reason, 4542 }; 4543 4544 if (tx) 4545 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4546 else 4547 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4548 4549 drv_event_callback(sdata->local, sdata, &event); 4550 } 4551 4552 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4553 { 4554 struct ieee80211_local *local = sdata->local; 4555 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4556 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4557 4558 lockdep_assert_wiphy(local->hw.wiphy); 4559 4560 if (!ifmgd->associated) 4561 return; 4562 4563 if (!ifmgd->driver_disconnect) { 4564 unsigned int link_id; 4565 4566 /* 4567 * AP is probably out of range (or not reachable for another 4568 * reason) so remove the bss structs for that AP. In the case 4569 * of multi-link, it's not clear that all of them really are 4570 * out of range, but if they weren't the driver likely would 4571 * have switched to just have a single link active? 4572 */ 4573 for (link_id = 0; 4574 link_id < ARRAY_SIZE(sdata->link); 4575 link_id++) { 4576 struct ieee80211_link_data *link; 4577 4578 link = sdata_dereference(sdata->link[link_id], sdata); 4579 if (!link || !link->conf->bss) 4580 continue; 4581 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4582 link->conf->bss = NULL; 4583 } 4584 } 4585 4586 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4587 ifmgd->driver_disconnect ? 4588 WLAN_REASON_DEAUTH_LEAVING : 4589 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4590 true, frame_buf); 4591 /* the other links will be destroyed */ 4592 sdata->vif.bss_conf.csa_active = false; 4593 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4594 sdata->deflink.u.mgd.csa.blocked_tx = false; 4595 ieee80211_vif_unblock_queues_csa(sdata); 4596 4597 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4598 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4599 ifmgd->reconnect); 4600 ifmgd->reconnect = false; 4601 } 4602 4603 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4604 struct wiphy_work *work) 4605 { 4606 struct ieee80211_sub_if_data *sdata = 4607 container_of(work, struct ieee80211_sub_if_data, 4608 u.mgd.beacon_connection_loss_work); 4609 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4610 4611 if (ifmgd->connection_loss) { 4612 sdata_info(sdata, "Connection to AP %pM lost\n", 4613 sdata->vif.cfg.ap_addr); 4614 __ieee80211_disconnect(sdata); 4615 ifmgd->connection_loss = false; 4616 } else if (ifmgd->driver_disconnect) { 4617 sdata_info(sdata, 4618 "Driver requested disconnection from AP %pM\n", 4619 sdata->vif.cfg.ap_addr); 4620 __ieee80211_disconnect(sdata); 4621 ifmgd->driver_disconnect = false; 4622 } else { 4623 if (ifmgd->associated) 4624 sdata->deflink.u.mgd.beacon_loss_count++; 4625 ieee80211_mgd_probe_ap(sdata, true); 4626 } 4627 } 4628 4629 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4630 struct wiphy_work *work) 4631 { 4632 struct ieee80211_sub_if_data *sdata = 4633 container_of(work, struct ieee80211_sub_if_data, 4634 u.mgd.csa_connection_drop_work); 4635 4636 __ieee80211_disconnect(sdata); 4637 } 4638 4639 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4640 { 4641 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4642 struct ieee80211_hw *hw = &sdata->local->hw; 4643 4644 trace_api_beacon_loss(sdata); 4645 4646 sdata->u.mgd.connection_loss = false; 4647 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4648 } 4649 EXPORT_SYMBOL(ieee80211_beacon_loss); 4650 4651 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4652 { 4653 struct ieee80211_sub_if_data *sdata; 4654 struct ieee80211_hw *hw; 4655 4656 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4657 4658 sdata = vif_to_sdata(vif); 4659 hw = &sdata->local->hw; 4660 4661 trace_api_connection_loss(sdata); 4662 4663 sdata->u.mgd.connection_loss = true; 4664 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4665 } 4666 EXPORT_SYMBOL(ieee80211_connection_loss); 4667 4668 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4669 { 4670 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4671 struct ieee80211_hw *hw = &sdata->local->hw; 4672 4673 trace_api_disconnect(sdata, reconnect); 4674 4675 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4676 return; 4677 4678 sdata->u.mgd.driver_disconnect = true; 4679 sdata->u.mgd.reconnect = reconnect; 4680 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4681 } 4682 EXPORT_SYMBOL(ieee80211_disconnect); 4683 4684 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4685 bool assoc) 4686 { 4687 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4688 4689 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4690 4691 sdata->u.mgd.auth_data = NULL; 4692 4693 if (!assoc) { 4694 /* 4695 * we are not authenticated yet, the only timer that could be 4696 * running is the timeout for the authentication response which 4697 * which is not relevant anymore. 4698 */ 4699 timer_delete_sync(&sdata->u.mgd.timer); 4700 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4701 4702 /* other links are destroyed */ 4703 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4704 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4705 BSS_CHANGED_BSSID); 4706 sdata->u.mgd.flags = 0; 4707 4708 ieee80211_link_release_channel(&sdata->deflink); 4709 ieee80211_vif_set_links(sdata, 0, 0); 4710 } 4711 4712 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4713 kfree(auth_data); 4714 } 4715 4716 enum assoc_status { 4717 ASSOC_SUCCESS, 4718 ASSOC_REJECTED, 4719 ASSOC_TIMEOUT, 4720 ASSOC_ABANDON, 4721 }; 4722 4723 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4724 enum assoc_status status) 4725 { 4726 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4727 4728 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4729 4730 sdata->u.mgd.assoc_data = NULL; 4731 4732 if (status != ASSOC_SUCCESS) { 4733 /* 4734 * we are not associated yet, the only timer that could be 4735 * running is the timeout for the association response which 4736 * which is not relevant anymore. 4737 */ 4738 timer_delete_sync(&sdata->u.mgd.timer); 4739 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4740 4741 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4742 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4743 BSS_CHANGED_BSSID); 4744 sdata->u.mgd.flags = 0; 4745 sdata->vif.bss_conf.mu_mimo_owner = false; 4746 4747 if (status != ASSOC_REJECTED) { 4748 struct cfg80211_assoc_failure data = { 4749 .timeout = status == ASSOC_TIMEOUT, 4750 }; 4751 int i; 4752 4753 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4754 ARRAY_SIZE(assoc_data->link)); 4755 4756 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4757 data.bss[i] = assoc_data->link[i].bss; 4758 4759 if (ieee80211_vif_is_mld(&sdata->vif)) 4760 data.ap_mld_addr = assoc_data->ap_addr; 4761 4762 cfg80211_assoc_failure(sdata->dev, &data); 4763 } 4764 4765 ieee80211_link_release_channel(&sdata->deflink); 4766 ieee80211_vif_set_links(sdata, 0, 0); 4767 } 4768 4769 kfree(assoc_data); 4770 } 4771 4772 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4773 struct ieee80211_mgmt *mgmt, size_t len) 4774 { 4775 struct ieee80211_local *local = sdata->local; 4776 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4777 const struct element *challenge; 4778 u8 *pos; 4779 u32 tx_flags = 0; 4780 struct ieee80211_prep_tx_info info = { 4781 .subtype = IEEE80211_STYPE_AUTH, 4782 .link_id = auth_data->link_id, 4783 }; 4784 4785 pos = mgmt->u.auth.variable; 4786 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4787 len - (pos - (u8 *)mgmt)); 4788 if (!challenge) 4789 return; 4790 auth_data->expected_transaction = 4; 4791 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4792 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4793 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4794 IEEE80211_TX_INTFL_MLME_CONN_TX; 4795 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4796 (void *)challenge, 4797 challenge->datalen + sizeof(*challenge), 4798 auth_data->ap_addr, auth_data->ap_addr, 4799 auth_data->key, auth_data->key_len, 4800 auth_data->key_idx, tx_flags); 4801 } 4802 4803 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4804 { 4805 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4806 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4807 struct sta_info *sta; 4808 4809 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4810 4811 sdata_info(sdata, "authenticated\n"); 4812 ifmgd->auth_data->done = true; 4813 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4814 ifmgd->auth_data->timeout_started = true; 4815 run_again(sdata, ifmgd->auth_data->timeout); 4816 4817 /* move station state to auth */ 4818 sta = sta_info_get(sdata, ap_addr); 4819 if (!sta) { 4820 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4821 return false; 4822 } 4823 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4824 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4825 return false; 4826 } 4827 4828 return true; 4829 } 4830 4831 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4832 struct ieee80211_mgmt *mgmt, size_t len) 4833 { 4834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4835 u16 auth_alg, auth_transaction, status_code; 4836 struct ieee80211_event event = { 4837 .type = MLME_EVENT, 4838 .u.mlme.data = AUTH_EVENT, 4839 }; 4840 struct ieee80211_prep_tx_info info = { 4841 .subtype = IEEE80211_STYPE_AUTH, 4842 }; 4843 bool sae_need_confirm = false; 4844 4845 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4846 4847 if (len < 24 + 6) 4848 return; 4849 4850 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4851 return; 4852 4853 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4854 return; 4855 4856 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4857 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4858 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4859 4860 info.link_id = ifmgd->auth_data->link_id; 4861 4862 if (auth_alg != ifmgd->auth_data->algorithm || 4863 (auth_alg != WLAN_AUTH_SAE && 4864 auth_transaction != ifmgd->auth_data->expected_transaction) || 4865 (auth_alg == WLAN_AUTH_SAE && 4866 (auth_transaction < ifmgd->auth_data->expected_transaction || 4867 auth_transaction > 2))) { 4868 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4869 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4870 auth_transaction, 4871 ifmgd->auth_data->expected_transaction); 4872 goto notify_driver; 4873 } 4874 4875 if (status_code != WLAN_STATUS_SUCCESS) { 4876 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4877 4878 if (auth_alg == WLAN_AUTH_SAE && 4879 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4880 (auth_transaction == 1 && 4881 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4882 status_code == WLAN_STATUS_SAE_PK)))) { 4883 /* waiting for userspace now */ 4884 ifmgd->auth_data->waiting = true; 4885 ifmgd->auth_data->timeout = 4886 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4887 ifmgd->auth_data->timeout_started = true; 4888 run_again(sdata, ifmgd->auth_data->timeout); 4889 if (auth_transaction == 1) 4890 sae_need_confirm = true; 4891 goto notify_driver; 4892 } 4893 4894 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4895 mgmt->sa, status_code); 4896 ieee80211_destroy_auth_data(sdata, false); 4897 event.u.mlme.status = MLME_DENIED; 4898 event.u.mlme.reason = status_code; 4899 drv_event_callback(sdata->local, sdata, &event); 4900 goto notify_driver; 4901 } 4902 4903 switch (ifmgd->auth_data->algorithm) { 4904 case WLAN_AUTH_OPEN: 4905 case WLAN_AUTH_LEAP: 4906 case WLAN_AUTH_FT: 4907 case WLAN_AUTH_SAE: 4908 case WLAN_AUTH_FILS_SK: 4909 case WLAN_AUTH_FILS_SK_PFS: 4910 case WLAN_AUTH_FILS_PK: 4911 break; 4912 case WLAN_AUTH_SHARED_KEY: 4913 if (ifmgd->auth_data->expected_transaction != 4) { 4914 ieee80211_auth_challenge(sdata, mgmt, len); 4915 /* need another frame */ 4916 return; 4917 } 4918 break; 4919 default: 4920 WARN_ONCE(1, "invalid auth alg %d", 4921 ifmgd->auth_data->algorithm); 4922 goto notify_driver; 4923 } 4924 4925 event.u.mlme.status = MLME_SUCCESS; 4926 info.success = 1; 4927 drv_event_callback(sdata->local, sdata, &event); 4928 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4929 (auth_transaction == 2 && 4930 ifmgd->auth_data->expected_transaction == 2)) { 4931 if (!ieee80211_mark_sta_auth(sdata)) 4932 return; /* ignore frame -- wait for timeout */ 4933 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4934 auth_transaction == 1) { 4935 sae_need_confirm = true; 4936 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4937 auth_transaction == 2) { 4938 sdata_info(sdata, "SAE peer confirmed\n"); 4939 ifmgd->auth_data->peer_confirmed = true; 4940 } 4941 4942 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4943 notify_driver: 4944 if (!sae_need_confirm) 4945 drv_mgd_complete_tx(sdata->local, sdata, &info); 4946 } 4947 4948 #define case_WLAN(type) \ 4949 case WLAN_REASON_##type: return #type 4950 4951 const char *ieee80211_get_reason_code_string(u16 reason_code) 4952 { 4953 switch (reason_code) { 4954 case_WLAN(UNSPECIFIED); 4955 case_WLAN(PREV_AUTH_NOT_VALID); 4956 case_WLAN(DEAUTH_LEAVING); 4957 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4958 case_WLAN(DISASSOC_AP_BUSY); 4959 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4960 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4961 case_WLAN(DISASSOC_STA_HAS_LEFT); 4962 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4963 case_WLAN(DISASSOC_BAD_POWER); 4964 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4965 case_WLAN(INVALID_IE); 4966 case_WLAN(MIC_FAILURE); 4967 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4968 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4969 case_WLAN(IE_DIFFERENT); 4970 case_WLAN(INVALID_GROUP_CIPHER); 4971 case_WLAN(INVALID_PAIRWISE_CIPHER); 4972 case_WLAN(INVALID_AKMP); 4973 case_WLAN(UNSUPP_RSN_VERSION); 4974 case_WLAN(INVALID_RSN_IE_CAP); 4975 case_WLAN(IEEE8021X_FAILED); 4976 case_WLAN(CIPHER_SUITE_REJECTED); 4977 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4978 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4979 case_WLAN(DISASSOC_LOW_ACK); 4980 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4981 case_WLAN(QSTA_LEAVE_QBSS); 4982 case_WLAN(QSTA_NOT_USE); 4983 case_WLAN(QSTA_REQUIRE_SETUP); 4984 case_WLAN(QSTA_TIMEOUT); 4985 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4986 case_WLAN(MESH_PEER_CANCELED); 4987 case_WLAN(MESH_MAX_PEERS); 4988 case_WLAN(MESH_CONFIG); 4989 case_WLAN(MESH_CLOSE); 4990 case_WLAN(MESH_MAX_RETRIES); 4991 case_WLAN(MESH_CONFIRM_TIMEOUT); 4992 case_WLAN(MESH_INVALID_GTK); 4993 case_WLAN(MESH_INCONSISTENT_PARAM); 4994 case_WLAN(MESH_INVALID_SECURITY); 4995 case_WLAN(MESH_PATH_ERROR); 4996 case_WLAN(MESH_PATH_NOFORWARD); 4997 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4998 case_WLAN(MAC_EXISTS_IN_MBSS); 4999 case_WLAN(MESH_CHAN_REGULATORY); 5000 case_WLAN(MESH_CHAN); 5001 default: return "<unknown>"; 5002 } 5003 } 5004 5005 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5006 struct ieee80211_mgmt *mgmt, size_t len) 5007 { 5008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5009 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5010 5011 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5012 5013 if (len < 24 + 2) 5014 return; 5015 5016 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5017 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5018 return; 5019 } 5020 5021 if (ifmgd->associated && 5022 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5023 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5024 sdata->vif.cfg.ap_addr, reason_code, 5025 ieee80211_get_reason_code_string(reason_code)); 5026 5027 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5028 5029 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5030 reason_code, false); 5031 return; 5032 } 5033 5034 if (ifmgd->assoc_data && 5035 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5036 sdata_info(sdata, 5037 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5038 ifmgd->assoc_data->ap_addr, reason_code, 5039 ieee80211_get_reason_code_string(reason_code)); 5040 5041 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5042 5043 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5044 return; 5045 } 5046 } 5047 5048 5049 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5050 struct ieee80211_mgmt *mgmt, size_t len) 5051 { 5052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5053 u16 reason_code; 5054 5055 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5056 5057 if (len < 24 + 2) 5058 return; 5059 5060 if (!ifmgd->associated || 5061 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5062 return; 5063 5064 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5065 5066 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5067 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5068 return; 5069 } 5070 5071 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5072 sdata->vif.cfg.ap_addr, reason_code, 5073 ieee80211_get_reason_code_string(reason_code)); 5074 5075 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5076 5077 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5078 false); 5079 } 5080 5081 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5082 struct ieee80211_supported_band *sband, 5083 const struct link_sta_info *link_sta, 5084 const struct ieee802_11_elems *elems) 5085 { 5086 const struct ieee80211_sta_he_cap *own_he_cap = 5087 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5088 5089 if (elems->ext_capab_len < 10) 5090 return false; 5091 5092 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5093 return false; 5094 5095 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5096 IEEE80211_HE_MAC_CAP0_TWT_RES && 5097 own_he_cap && 5098 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5099 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5100 } 5101 5102 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5103 struct ieee80211_supported_band *sband, 5104 struct ieee80211_link_data *link, 5105 struct link_sta_info *link_sta, 5106 struct ieee802_11_elems *elems) 5107 { 5108 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5109 5110 if (link->conf->twt_requester != twt) { 5111 link->conf->twt_requester = twt; 5112 return BSS_CHANGED_TWT; 5113 } 5114 return 0; 5115 } 5116 5117 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5118 struct ieee80211_bss_conf *bss_conf, 5119 struct ieee80211_supported_band *sband, 5120 struct link_sta_info *link_sta) 5121 { 5122 const struct ieee80211_sta_he_cap *own_he_cap = 5123 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5124 5125 return bss_conf->he_support && 5126 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5127 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5128 own_he_cap && 5129 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5130 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5131 } 5132 5133 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5134 bool enabled) 5135 { 5136 /* in any case this is called, dialog token should be reset */ 5137 sdata->u.mgd.epcs.dialog_token = 0; 5138 5139 if (sdata->u.mgd.epcs.enabled == enabled) 5140 return; 5141 5142 sdata->u.mgd.epcs.enabled = enabled; 5143 cfg80211_epcs_changed(sdata->dev, enabled); 5144 } 5145 5146 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5147 { 5148 struct ieee80211_local *local = sdata->local; 5149 u8 link_id; 5150 5151 if (!sdata->u.mgd.epcs.enabled) 5152 return; 5153 5154 lockdep_assert_wiphy(local->hw.wiphy); 5155 5156 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5157 struct ieee802_11_elems *elems; 5158 struct ieee80211_link_data *link; 5159 const struct cfg80211_bss_ies *ies; 5160 bool ret; 5161 5162 rcu_read_lock(); 5163 5164 link = sdata_dereference(sdata->link[link_id], sdata); 5165 if (!link || !link->conf || !link->conf->bss) { 5166 rcu_read_unlock(); 5167 continue; 5168 } 5169 5170 if (link->u.mgd.disable_wmm_tracking) { 5171 rcu_read_unlock(); 5172 ieee80211_set_wmm_default(link, false, false); 5173 continue; 5174 } 5175 5176 ies = rcu_dereference(link->conf->bss->beacon_ies); 5177 if (!ies) { 5178 rcu_read_unlock(); 5179 ieee80211_set_wmm_default(link, false, false); 5180 continue; 5181 } 5182 5183 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5184 NULL); 5185 if (!elems) { 5186 rcu_read_unlock(); 5187 ieee80211_set_wmm_default(link, false, false); 5188 continue; 5189 } 5190 5191 ret = _ieee80211_sta_wmm_params(local, link, 5192 elems->wmm_param, 5193 elems->wmm_param_len, 5194 elems->mu_edca_param_set); 5195 5196 kfree(elems); 5197 rcu_read_unlock(); 5198 5199 if (!ret) { 5200 ieee80211_set_wmm_default(link, false, false); 5201 continue; 5202 } 5203 5204 ieee80211_mgd_set_link_qos_params(link); 5205 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5206 } 5207 } 5208 5209 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5210 struct link_sta_info *link_sta, 5211 struct cfg80211_bss *cbss, 5212 struct ieee80211_mgmt *mgmt, 5213 const u8 *elem_start, 5214 unsigned int elem_len, 5215 u64 *changed) 5216 { 5217 struct ieee80211_sub_if_data *sdata = link->sdata; 5218 struct ieee80211_mgd_assoc_data *assoc_data = 5219 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5220 struct ieee80211_bss_conf *bss_conf = link->conf; 5221 struct ieee80211_local *local = sdata->local; 5222 unsigned int link_id = link->link_id; 5223 struct ieee80211_elems_parse_params parse_params = { 5224 .mode = link->u.mgd.conn.mode, 5225 .start = elem_start, 5226 .len = elem_len, 5227 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5228 .from_ap = true, 5229 }; 5230 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5231 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5232 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5233 const struct cfg80211_bss_ies *bss_ies = NULL; 5234 struct ieee80211_supported_band *sband; 5235 struct ieee802_11_elems *elems; 5236 const __le16 prof_bss_param_ch_present = 5237 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5238 u16 capab_info; 5239 bool ret; 5240 5241 elems = ieee802_11_parse_elems_full(&parse_params); 5242 if (!elems) 5243 return false; 5244 5245 if (link_id == assoc_data->assoc_link_id) { 5246 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5247 5248 /* 5249 * we should not get to this flow unless the association was 5250 * successful, so set the status directly to success 5251 */ 5252 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5253 if (elems->ml_basic) { 5254 int bss_param_ch_cnt = 5255 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5256 5257 if (bss_param_ch_cnt < 0) { 5258 ret = false; 5259 goto out; 5260 } 5261 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5262 bss_conf->bss_param_ch_cnt_link_id = link_id; 5263 } 5264 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5265 !elems->prof || 5266 !(elems->prof->control & prof_bss_param_ch_present)) { 5267 ret = false; 5268 goto out; 5269 } else { 5270 const u8 *ptr = elems->prof->variable + 5271 elems->prof->sta_info_len - 1; 5272 int bss_param_ch_cnt; 5273 5274 /* 5275 * During parsing, we validated that these fields exist, 5276 * otherwise elems->prof would have been set to NULL. 5277 */ 5278 capab_info = get_unaligned_le16(ptr); 5279 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5280 bss_param_ch_cnt = 5281 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5282 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5283 bss_conf->bss_param_ch_cnt_link_id = link_id; 5284 5285 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5286 link_info(link, "association response status code=%u\n", 5287 assoc_data->link[link_id].status); 5288 ret = true; 5289 goto out; 5290 } 5291 } 5292 5293 if (!is_s1g && !elems->supp_rates) { 5294 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5295 ret = false; 5296 goto out; 5297 } 5298 5299 link->u.mgd.tdls_chan_switch_prohibited = 5300 elems->ext_capab && elems->ext_capab_len >= 5 && 5301 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5302 5303 /* 5304 * Some APs are erroneously not including some information in their 5305 * (re)association response frames. Try to recover by using the data 5306 * from the beacon or probe response. This seems to afflict mobile 5307 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5308 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5309 */ 5310 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5311 ((assoc_data->wmm && !elems->wmm_param) || 5312 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5313 (!elems->ht_cap_elem || !elems->ht_operation)) || 5314 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5315 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5316 const struct cfg80211_bss_ies *ies; 5317 struct ieee802_11_elems *bss_elems; 5318 5319 rcu_read_lock(); 5320 ies = rcu_dereference(cbss->ies); 5321 if (ies) 5322 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5323 GFP_ATOMIC); 5324 rcu_read_unlock(); 5325 if (!bss_ies) { 5326 ret = false; 5327 goto out; 5328 } 5329 5330 parse_params.start = bss_ies->data; 5331 parse_params.len = bss_ies->len; 5332 parse_params.bss = cbss; 5333 parse_params.link_id = -1; 5334 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5335 if (!bss_elems) { 5336 ret = false; 5337 goto out; 5338 } 5339 5340 if (assoc_data->wmm && 5341 !elems->wmm_param && bss_elems->wmm_param) { 5342 elems->wmm_param = bss_elems->wmm_param; 5343 sdata_info(sdata, 5344 "AP bug: WMM param missing from AssocResp\n"); 5345 } 5346 5347 /* 5348 * Also check if we requested HT/VHT, otherwise the AP doesn't 5349 * have to include the IEs in the (re)association response. 5350 */ 5351 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5352 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5353 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5354 sdata_info(sdata, 5355 "AP bug: HT capability missing from AssocResp\n"); 5356 } 5357 if (!elems->ht_operation && bss_elems->ht_operation && 5358 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5359 elems->ht_operation = bss_elems->ht_operation; 5360 sdata_info(sdata, 5361 "AP bug: HT operation missing from AssocResp\n"); 5362 } 5363 5364 if (is_5ghz) { 5365 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5366 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5367 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5368 sdata_info(sdata, 5369 "AP bug: VHT capa missing from AssocResp\n"); 5370 } 5371 5372 if (!elems->vht_operation && bss_elems->vht_operation && 5373 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5374 elems->vht_operation = bss_elems->vht_operation; 5375 sdata_info(sdata, 5376 "AP bug: VHT operation missing from AssocResp\n"); 5377 } 5378 } 5379 kfree(bss_elems); 5380 } 5381 5382 /* 5383 * We previously checked these in the beacon/probe response, so 5384 * they should be present here. This is just a safety net. 5385 * Note that the ieee80211_config_bw() below would also check 5386 * for this (and more), but this has better error reporting. 5387 */ 5388 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5389 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5390 sdata_info(sdata, 5391 "HT AP is missing WMM params or HT capability/operation\n"); 5392 ret = false; 5393 goto out; 5394 } 5395 5396 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5397 (!elems->vht_cap_elem || !elems->vht_operation)) { 5398 sdata_info(sdata, 5399 "VHT AP is missing VHT capability/operation\n"); 5400 ret = false; 5401 goto out; 5402 } 5403 5404 /* check/update if AP changed anything in assoc response vs. scan */ 5405 if (ieee80211_config_bw(link, elems, 5406 link_id == assoc_data->assoc_link_id, 5407 changed, 5408 le16_to_cpu(mgmt->frame_control) & 5409 IEEE80211_FCTL_STYPE)) { 5410 ret = false; 5411 goto out; 5412 } 5413 5414 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5415 ret = false; 5416 goto out; 5417 } 5418 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5419 5420 /* Set up internal HT/VHT capabilities */ 5421 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5422 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5423 elems->ht_cap_elem, 5424 link_sta); 5425 5426 if (elems->vht_cap_elem && 5427 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5428 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5429 const struct cfg80211_bss_ies *ies; 5430 5431 /* 5432 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5433 * too large maximum MPDU length in the association response 5434 * (indicating 12k) that it cannot actually process ... 5435 * Work around that. 5436 */ 5437 rcu_read_lock(); 5438 ies = rcu_dereference(cbss->ies); 5439 if (ies) { 5440 const struct element *elem; 5441 5442 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5443 ies->data, ies->len); 5444 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5445 bss_vht_cap = (const void *)elem->data; 5446 } 5447 5448 if (ieee80211_hw_check(&local->hw, STRICT) && 5449 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5450 sizeof(*bss_vht_cap)))) { 5451 rcu_read_unlock(); 5452 ret = false; 5453 link_info(link, "VHT capabilities mismatch\n"); 5454 goto out; 5455 } 5456 5457 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5458 elems->vht_cap_elem, 5459 bss_vht_cap, link_sta); 5460 rcu_read_unlock(); 5461 } 5462 5463 if (elems->he_operation && 5464 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5465 elems->he_cap) { 5466 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5467 elems->he_cap, 5468 elems->he_cap_len, 5469 elems->he_6ghz_capa, 5470 link_sta); 5471 5472 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5473 if (elems->rsnx && elems->rsnx_len && 5474 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5475 wiphy_ext_feature_isset(local->hw.wiphy, 5476 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5477 bss_conf->twt_protected = true; 5478 else 5479 bss_conf->twt_protected = false; 5480 5481 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5482 link_sta, elems); 5483 5484 if (elems->eht_operation && elems->eht_cap && 5485 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5486 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5487 elems->he_cap, 5488 elems->he_cap_len, 5489 elems->eht_cap, 5490 elems->eht_cap_len, 5491 link_sta); 5492 5493 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5494 bss_conf->epcs_support = bss_conf->eht_support && 5495 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5496 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5497 5498 /* EPCS might be already enabled but a new added link 5499 * does not support EPCS. This should not really happen 5500 * in practice. 5501 */ 5502 if (sdata->u.mgd.epcs.enabled && 5503 !bss_conf->epcs_support) 5504 ieee80211_epcs_teardown(sdata); 5505 } else { 5506 bss_conf->eht_support = false; 5507 bss_conf->epcs_support = false; 5508 } 5509 } else { 5510 bss_conf->he_support = false; 5511 bss_conf->twt_requester = false; 5512 bss_conf->twt_protected = false; 5513 bss_conf->eht_support = false; 5514 bss_conf->epcs_support = false; 5515 } 5516 5517 if (elems->s1g_oper && 5518 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5519 elems->s1g_capab) 5520 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5521 link_sta); 5522 5523 bss_conf->twt_broadcast = 5524 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5525 5526 if (bss_conf->he_support) { 5527 bss_conf->he_bss_color.color = 5528 le32_get_bits(elems->he_operation->he_oper_params, 5529 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5530 bss_conf->he_bss_color.partial = 5531 le32_get_bits(elems->he_operation->he_oper_params, 5532 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5533 bss_conf->he_bss_color.enabled = 5534 !le32_get_bits(elems->he_operation->he_oper_params, 5535 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5536 5537 if (bss_conf->he_bss_color.enabled) 5538 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5539 5540 bss_conf->htc_trig_based_pkt_ext = 5541 le32_get_bits(elems->he_operation->he_oper_params, 5542 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5543 bss_conf->frame_time_rts_th = 5544 le32_get_bits(elems->he_operation->he_oper_params, 5545 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5546 5547 bss_conf->uora_exists = !!elems->uora_element; 5548 if (elems->uora_element) 5549 bss_conf->uora_ocw_range = elems->uora_element[0]; 5550 5551 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5552 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5553 /* TODO: OPEN: what happens if BSS color disable is set? */ 5554 } 5555 5556 if (cbss->transmitted_bss) { 5557 bss_conf->nontransmitted = true; 5558 ether_addr_copy(bss_conf->transmitter_bssid, 5559 cbss->transmitted_bss->bssid); 5560 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5561 bss_conf->bssid_index = cbss->bssid_index; 5562 } 5563 5564 /* 5565 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5566 * in their association response, so ignore that data for our own 5567 * configuration. If it changed since the last beacon, we'll get the 5568 * next beacon and update then. 5569 */ 5570 5571 /* 5572 * If an operating mode notification IE is present, override the 5573 * NSS calculation (that would be done in rate_control_rate_init()) 5574 * and use the # of streams from that element. 5575 */ 5576 if (elems->opmode_notif && 5577 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5578 u8 nss; 5579 5580 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5581 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5582 nss += 1; 5583 link_sta->pub->rx_nss = nss; 5584 } 5585 5586 /* 5587 * Always handle WMM once after association regardless 5588 * of the first value the AP uses. Setting -1 here has 5589 * that effect because the AP values is an unsigned 5590 * 4-bit value. 5591 */ 5592 link->u.mgd.wmm_last_param_set = -1; 5593 link->u.mgd.mu_edca_last_param_set = -1; 5594 5595 if (link->u.mgd.disable_wmm_tracking) { 5596 ieee80211_set_wmm_default(link, false, false); 5597 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5598 elems->wmm_param_len, 5599 elems->mu_edca_param_set)) { 5600 /* still enable QoS since we might have HT/VHT */ 5601 ieee80211_set_wmm_default(link, false, true); 5602 /* disable WMM tracking in this case to disable 5603 * tracking WMM parameter changes in the beacon if 5604 * the parameters weren't actually valid. Doing so 5605 * avoids changing parameters very strangely when 5606 * the AP is going back and forth between valid and 5607 * invalid parameters. 5608 */ 5609 link->u.mgd.disable_wmm_tracking = true; 5610 } 5611 5612 if (elems->max_idle_period_ie) { 5613 bss_conf->max_idle_period = 5614 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5615 bss_conf->protected_keep_alive = 5616 !!(elems->max_idle_period_ie->idle_options & 5617 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5618 *changed |= BSS_CHANGED_KEEP_ALIVE; 5619 } else { 5620 bss_conf->max_idle_period = 0; 5621 bss_conf->protected_keep_alive = false; 5622 } 5623 5624 /* set assoc capability (AID was already set earlier), 5625 * ieee80211_set_associated() will tell the driver */ 5626 bss_conf->assoc_capability = capab_info; 5627 5628 ret = true; 5629 out: 5630 kfree(elems); 5631 kfree(bss_ies); 5632 return ret; 5633 } 5634 5635 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5636 struct sta_info *sta, 5637 struct link_sta_info *link_sta, 5638 struct cfg80211_bss *cbss) 5639 { 5640 struct ieee80211_sub_if_data *sdata = link->sdata; 5641 struct ieee80211_local *local = sdata->local; 5642 struct ieee80211_bss *bss = (void *)cbss->priv; 5643 u32 rates = 0, basic_rates = 0; 5644 bool have_higher_than_11mbit = false; 5645 int min_rate = INT_MAX, min_rate_index = -1; 5646 struct ieee80211_supported_band *sband; 5647 5648 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5649 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5650 5651 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5652 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5653 ieee80211_s1g_sta_rate_init(sta); 5654 return 0; 5655 } 5656 5657 sband = local->hw.wiphy->bands[cbss->channel->band]; 5658 5659 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5660 NULL, 0, 5661 &rates, &basic_rates, NULL, 5662 &have_higher_than_11mbit, 5663 &min_rate, &min_rate_index); 5664 5665 /* 5666 * This used to be a workaround for basic rates missing 5667 * in the association response frame. Now that we no 5668 * longer use the basic rates from there, it probably 5669 * doesn't happen any more, but keep the workaround so 5670 * in case some *other* APs are buggy in different ways 5671 * we can connect -- with a warning. 5672 * Allow this workaround only in case the AP provided at least 5673 * one rate. 5674 */ 5675 if (min_rate_index < 0) { 5676 link_info(link, "No legacy rates in association response\n"); 5677 return -EINVAL; 5678 } else if (!basic_rates) { 5679 link_info(link, "No basic rates, using min rate instead\n"); 5680 basic_rates = BIT(min_rate_index); 5681 } 5682 5683 if (rates) 5684 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5685 else 5686 link_info(link, "No rates found, keeping mandatory only\n"); 5687 5688 link->conf->basic_rates = basic_rates; 5689 5690 /* cf. IEEE 802.11 9.2.12 */ 5691 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5692 have_higher_than_11mbit; 5693 5694 return 0; 5695 } 5696 5697 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5698 struct cfg80211_bss *cbss) 5699 { 5700 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5701 const struct element *ht_cap_elem, *vht_cap_elem; 5702 const struct cfg80211_bss_ies *ies; 5703 const struct ieee80211_ht_cap *ht_cap; 5704 const struct ieee80211_vht_cap *vht_cap; 5705 const struct ieee80211_he_cap_elem *he_cap; 5706 const struct element *he_cap_elem; 5707 u16 mcs_80_map, mcs_160_map; 5708 int i, mcs_nss_size; 5709 bool support_160; 5710 u8 chains = 1; 5711 5712 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5713 return chains; 5714 5715 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5716 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5717 ht_cap = (void *)ht_cap_elem->data; 5718 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5719 /* 5720 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5721 * "Tx Unequal Modulation Supported" fields. 5722 */ 5723 } 5724 5725 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5726 return chains; 5727 5728 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5729 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5730 u8 nss; 5731 u16 tx_mcs_map; 5732 5733 vht_cap = (void *)vht_cap_elem->data; 5734 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5735 for (nss = 8; nss > 0; nss--) { 5736 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5737 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5738 break; 5739 } 5740 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5741 chains = max(chains, nss); 5742 } 5743 5744 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5745 return chains; 5746 5747 ies = rcu_dereference(cbss->ies); 5748 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5749 ies->data, ies->len); 5750 5751 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5752 return chains; 5753 5754 /* skip one byte ext_tag_id */ 5755 he_cap = (void *)(he_cap_elem->data + 1); 5756 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5757 5758 /* invalid HE IE */ 5759 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5760 return chains; 5761 5762 /* mcs_nss is right after he_cap info */ 5763 he_mcs_nss_supp = (void *)(he_cap + 1); 5764 5765 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5766 5767 for (i = 7; i >= 0; i--) { 5768 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5769 5770 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5771 chains = max_t(u8, chains, i + 1); 5772 break; 5773 } 5774 } 5775 5776 support_160 = he_cap->phy_cap_info[0] & 5777 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5778 5779 if (!support_160) 5780 return chains; 5781 5782 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5783 for (i = 7; i >= 0; i--) { 5784 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5785 5786 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5787 chains = max_t(u8, chains, i + 1); 5788 break; 5789 } 5790 } 5791 5792 return chains; 5793 } 5794 5795 static void 5796 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5797 struct ieee80211_supported_band *sband, 5798 struct cfg80211_assoc_request *req, 5799 bool wmm_used, int link_id, 5800 struct ieee80211_conn_settings *conn) 5801 { 5802 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5803 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5804 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5805 const struct ieee80211_sta_he_cap *he_cap; 5806 const struct ieee80211_sta_eht_cap *eht_cap; 5807 struct ieee80211_sta_vht_cap vht_cap; 5808 5809 if (sband->band == NL80211_BAND_S1GHZ) { 5810 conn->mode = IEEE80211_CONN_MODE_S1G; 5811 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5812 mlme_dbg(sdata, "operating as S1G STA\n"); 5813 return; 5814 } 5815 5816 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5817 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5818 5819 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5820 5821 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5822 mlme_link_id_dbg(sdata, link_id, 5823 "HT disabled by flag, limiting to legacy\n"); 5824 goto out; 5825 } 5826 5827 if (!wmm_used) { 5828 mlme_link_id_dbg(sdata, link_id, 5829 "WMM/QoS not supported, limiting to legacy\n"); 5830 goto out; 5831 } 5832 5833 if (req) { 5834 unsigned int i; 5835 5836 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5837 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5838 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5839 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5840 netdev_info(sdata->dev, 5841 "WEP/TKIP use, limiting to legacy\n"); 5842 goto out; 5843 } 5844 } 5845 } 5846 5847 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5848 mlme_link_id_dbg(sdata, link_id, 5849 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5850 goto out; 5851 } 5852 5853 /* HT is fine */ 5854 conn->mode = IEEE80211_CONN_MODE_HT; 5855 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5856 IEEE80211_CONN_BW_LIMIT_40 : 5857 IEEE80211_CONN_BW_LIMIT_20; 5858 5859 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5860 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5861 5862 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5863 mlme_link_id_dbg(sdata, link_id, 5864 "VHT disabled by flag, limiting to HT\n"); 5865 goto out; 5866 } 5867 5868 if (vht_cap.vht_supported && is_5ghz) { 5869 bool have_80mhz = false; 5870 unsigned int i; 5871 5872 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5873 mlme_link_id_dbg(sdata, link_id, 5874 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5875 goto out; 5876 } 5877 5878 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5879 for (i = 0; i < sband->n_channels; i++) { 5880 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5881 IEEE80211_CHAN_NO_80MHZ)) 5882 continue; 5883 5884 have_80mhz = true; 5885 break; 5886 } 5887 5888 if (!have_80mhz) { 5889 mlme_link_id_dbg(sdata, link_id, 5890 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5891 goto out; 5892 } 5893 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5894 mlme_link_id_dbg(sdata, link_id, 5895 "no VHT support on 5 GHz, limiting to HT\n"); 5896 goto out; 5897 } 5898 5899 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5900 if (sband->band != NL80211_BAND_2GHZ) { 5901 conn->mode = IEEE80211_CONN_MODE_VHT; 5902 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5903 } 5904 5905 if (is_5ghz && 5906 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5907 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5908 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5909 mlme_link_id_dbg(sdata, link_id, 5910 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5911 } 5912 5913 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5914 mlme_link_id_dbg(sdata, link_id, 5915 "HE disabled by flag, limiting to HT/VHT\n"); 5916 goto out; 5917 } 5918 5919 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5920 if (!he_cap) { 5921 WARN_ON(is_6ghz); 5922 mlme_link_id_dbg(sdata, link_id, 5923 "no HE support, limiting to HT/VHT\n"); 5924 goto out; 5925 } 5926 5927 /* so we have HE */ 5928 conn->mode = IEEE80211_CONN_MODE_HE; 5929 5930 /* check bandwidth */ 5931 switch (sband->band) { 5932 default: 5933 case NL80211_BAND_2GHZ: 5934 if (he_cap->he_cap_elem.phy_cap_info[0] & 5935 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5936 break; 5937 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5938 mlme_link_id_dbg(sdata, link_id, 5939 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5940 break; 5941 case NL80211_BAND_5GHZ: 5942 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5943 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5944 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5945 mlme_link_id_dbg(sdata, link_id, 5946 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5947 break; 5948 } 5949 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5950 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5951 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5952 conn->bw_limit, 5953 IEEE80211_CONN_BW_LIMIT_80); 5954 mlme_link_id_dbg(sdata, link_id, 5955 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5956 } 5957 break; 5958 case NL80211_BAND_6GHZ: 5959 if (he_cap->he_cap_elem.phy_cap_info[0] & 5960 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5961 break; 5962 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5963 conn->bw_limit, 5964 IEEE80211_CONN_BW_LIMIT_80); 5965 mlme_link_id_dbg(sdata, link_id, 5966 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5967 break; 5968 } 5969 5970 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5971 mlme_link_id_dbg(sdata, link_id, 5972 "EHT disabled by flag, limiting to HE\n"); 5973 goto out; 5974 } 5975 5976 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5977 if (!eht_cap) { 5978 mlme_link_id_dbg(sdata, link_id, 5979 "no EHT support, limiting to HE\n"); 5980 goto out; 5981 } 5982 5983 /* we have EHT */ 5984 5985 conn->mode = IEEE80211_CONN_MODE_EHT; 5986 5987 /* check bandwidth */ 5988 if (is_6ghz && 5989 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5990 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5991 else if (is_6ghz) 5992 mlme_link_id_dbg(sdata, link_id, 5993 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5994 5995 out: 5996 mlme_link_id_dbg(sdata, link_id, 5997 "determined local STA to be %s, BW limited to %d MHz\n", 5998 ieee80211_conn_mode_str(conn->mode), 5999 20 * (1 << conn->bw_limit)); 6000 } 6001 6002 static void 6003 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6004 struct ieee80211_supported_band *sband, 6005 struct cfg80211_auth_request *req, 6006 bool wmm_used, 6007 struct ieee80211_conn_settings *conn) 6008 { 6009 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6010 req->link_id > 0 ? req->link_id : 0, 6011 conn); 6012 } 6013 6014 static void 6015 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6016 struct ieee80211_supported_band *sband, 6017 struct cfg80211_assoc_request *req, 6018 bool wmm_used, int link_id, 6019 struct ieee80211_conn_settings *conn) 6020 { 6021 struct ieee80211_conn_settings tmp; 6022 6023 WARN_ON(!req); 6024 6025 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6026 &tmp); 6027 6028 conn->mode = min_t(enum ieee80211_conn_mode, 6029 conn->mode, tmp.mode); 6030 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6031 conn->bw_limit, tmp.bw_limit); 6032 } 6033 6034 static enum ieee80211_ap_reg_power 6035 ieee80211_ap_power_type(u8 control) 6036 { 6037 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 6038 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 6039 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 6040 return IEEE80211_REG_LPI_AP; 6041 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 6042 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 6043 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD: 6044 return IEEE80211_REG_SP_AP; 6045 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 6046 return IEEE80211_REG_VLP_AP; 6047 default: 6048 return IEEE80211_REG_UNSET_AP; 6049 } 6050 } 6051 6052 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6053 struct ieee80211_link_data *link, 6054 int link_id, 6055 struct cfg80211_bss *cbss, bool mlo, 6056 struct ieee80211_conn_settings *conn, 6057 unsigned long *userspace_selectors) 6058 { 6059 struct ieee80211_local *local = sdata->local; 6060 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6061 struct ieee80211_chan_req chanreq = {}; 6062 struct cfg80211_chan_def ap_chandef; 6063 struct ieee802_11_elems *elems; 6064 int ret; 6065 6066 lockdep_assert_wiphy(local->hw.wiphy); 6067 6068 rcu_read_lock(); 6069 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6070 &chanreq, &ap_chandef, 6071 userspace_selectors); 6072 6073 if (IS_ERR(elems)) { 6074 rcu_read_unlock(); 6075 return PTR_ERR(elems); 6076 } 6077 6078 if (mlo && !elems->ml_basic) { 6079 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6080 rcu_read_unlock(); 6081 kfree(elems); 6082 return -EINVAL; 6083 } 6084 6085 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6086 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6087 6088 if (elems->pwr_constr_elem) 6089 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6090 6091 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6092 if (he_6ghz_oper) 6093 link->conf->power_type = 6094 ieee80211_ap_power_type(he_6ghz_oper->control); 6095 else 6096 link_info(link, 6097 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6098 cbss->channel->center_freq); 6099 6100 link->conf->tpe = elems->tpe; 6101 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6102 &chanreq.oper); 6103 } 6104 rcu_read_unlock(); 6105 /* the element data was RCU protected so no longer valid anyway */ 6106 kfree(elems); 6107 elems = NULL; 6108 6109 if (!link) 6110 return 0; 6111 6112 rcu_read_lock(); 6113 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6114 local->rx_chains); 6115 rcu_read_unlock(); 6116 6117 /* 6118 * If this fails (possibly due to channel context sharing 6119 * on incompatible channels, e.g. 80+80 and 160 sharing the 6120 * same control channel) try to use a smaller bandwidth. 6121 */ 6122 ret = ieee80211_link_use_channel(link, &chanreq, 6123 IEEE80211_CHANCTX_SHARED); 6124 6125 /* don't downgrade for 5 and 10 MHz channels, though. */ 6126 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6127 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6128 return ret; 6129 6130 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6131 ieee80211_chanreq_downgrade(&chanreq, conn); 6132 6133 ret = ieee80211_link_use_channel(link, &chanreq, 6134 IEEE80211_CHANCTX_SHARED); 6135 } 6136 6137 return ret; 6138 } 6139 6140 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6141 u8 *dtim_count, u8 *dtim_period) 6142 { 6143 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6144 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6145 ies->len); 6146 const struct ieee80211_tim_ie *tim = NULL; 6147 const struct ieee80211_bssid_index *idx; 6148 bool valid = tim_ie && tim_ie[1] >= 2; 6149 6150 if (valid) 6151 tim = (void *)(tim_ie + 2); 6152 6153 if (dtim_count) 6154 *dtim_count = valid ? tim->dtim_count : 0; 6155 6156 if (dtim_period) 6157 *dtim_period = valid ? tim->dtim_period : 0; 6158 6159 /* Check if value is overridden by non-transmitted profile */ 6160 if (!idx_ie || idx_ie[1] < 3) 6161 return valid; 6162 6163 idx = (void *)(idx_ie + 2); 6164 6165 if (dtim_count) 6166 *dtim_count = idx->dtim_count; 6167 6168 if (dtim_period) 6169 *dtim_period = idx->dtim_period; 6170 6171 return true; 6172 } 6173 6174 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6175 struct ieee80211_mgmt *mgmt, 6176 struct ieee802_11_elems *elems, 6177 const u8 *elem_start, unsigned int elem_len) 6178 { 6179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6180 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6181 struct ieee80211_local *local = sdata->local; 6182 unsigned int link_id; 6183 struct sta_info *sta; 6184 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6185 u16 valid_links = 0, dormant_links = 0; 6186 int err; 6187 6188 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6189 /* 6190 * station info was already allocated and inserted before 6191 * the association and should be available to us 6192 */ 6193 sta = sta_info_get(sdata, assoc_data->ap_addr); 6194 if (WARN_ON(!sta)) 6195 goto out_err; 6196 6197 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6198 6199 if (ieee80211_vif_is_mld(&sdata->vif)) { 6200 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6201 if (!assoc_data->link[link_id].bss) 6202 continue; 6203 6204 valid_links |= BIT(link_id); 6205 if (assoc_data->link[link_id].disabled) 6206 dormant_links |= BIT(link_id); 6207 6208 if (link_id != assoc_data->assoc_link_id) { 6209 err = ieee80211_sta_allocate_link(sta, link_id); 6210 if (err) 6211 goto out_err; 6212 } 6213 } 6214 6215 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6216 } 6217 6218 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6219 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6220 struct ieee80211_link_data *link; 6221 struct link_sta_info *link_sta; 6222 6223 if (!cbss) 6224 continue; 6225 6226 link = sdata_dereference(sdata->link[link_id], sdata); 6227 if (WARN_ON(!link)) 6228 goto out_err; 6229 6230 if (ieee80211_vif_is_mld(&sdata->vif)) 6231 link_info(link, 6232 "local address %pM, AP link address %pM%s\n", 6233 link->conf->addr, 6234 assoc_data->link[link_id].bss->bssid, 6235 link_id == assoc_data->assoc_link_id ? 6236 " (assoc)" : ""); 6237 6238 link_sta = rcu_dereference_protected(sta->link[link_id], 6239 lockdep_is_held(&local->hw.wiphy->mtx)); 6240 if (WARN_ON(!link_sta)) 6241 goto out_err; 6242 6243 if (!link->u.mgd.have_beacon) { 6244 const struct cfg80211_bss_ies *ies; 6245 6246 rcu_read_lock(); 6247 ies = rcu_dereference(cbss->beacon_ies); 6248 if (ies) 6249 link->u.mgd.have_beacon = true; 6250 else 6251 ies = rcu_dereference(cbss->ies); 6252 ieee80211_get_dtim(ies, 6253 &link->conf->sync_dtim_count, 6254 &link->u.mgd.dtim_period); 6255 link->conf->beacon_int = cbss->beacon_interval; 6256 rcu_read_unlock(); 6257 } 6258 6259 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6260 6261 if (link_id != assoc_data->assoc_link_id) { 6262 link->u.mgd.conn = assoc_data->link[link_id].conn; 6263 6264 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6265 true, &link->u.mgd.conn, 6266 sdata->u.mgd.userspace_selectors); 6267 if (err) { 6268 link_info(link, "prep_channel failed\n"); 6269 goto out_err; 6270 } 6271 } 6272 6273 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6274 assoc_data->link[link_id].bss); 6275 if (err) 6276 goto out_err; 6277 6278 if (!ieee80211_assoc_config_link(link, link_sta, 6279 assoc_data->link[link_id].bss, 6280 mgmt, elem_start, elem_len, 6281 &changed[link_id])) 6282 goto out_err; 6283 6284 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6285 valid_links &= ~BIT(link_id); 6286 ieee80211_sta_remove_link(sta, link_id); 6287 continue; 6288 } 6289 6290 if (link_id != assoc_data->assoc_link_id) { 6291 err = ieee80211_sta_activate_link(sta, link_id); 6292 if (err) 6293 goto out_err; 6294 } 6295 } 6296 6297 /* links might have changed due to rejected ones, set them again */ 6298 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6299 6300 rate_control_rate_init_all_links(sta); 6301 6302 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6303 set_sta_flag(sta, WLAN_STA_MFP); 6304 sta->sta.mfp = true; 6305 } else { 6306 sta->sta.mfp = false; 6307 } 6308 6309 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6310 elems->ext_capab_len); 6311 6312 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6313 local->hw.queues >= IEEE80211_NUM_ACS; 6314 6315 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6316 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6317 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6318 if (err) { 6319 sdata_info(sdata, 6320 "failed to move station %pM to desired state\n", 6321 sta->sta.addr); 6322 WARN_ON(__sta_info_destroy(sta)); 6323 goto out_err; 6324 } 6325 6326 if (sdata->wdev.use_4addr) 6327 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6328 6329 ieee80211_set_associated(sdata, assoc_data, changed); 6330 6331 /* 6332 * If we're using 4-addr mode, let the AP know that we're 6333 * doing so, so that it can create the STA VLAN on its side 6334 */ 6335 if (ifmgd->use_4addr) 6336 ieee80211_send_4addr_nullfunc(local, sdata); 6337 6338 /* 6339 * Start timer to probe the connection to the AP now. 6340 * Also start the timer that will detect beacon loss. 6341 */ 6342 ieee80211_sta_reset_beacon_monitor(sdata); 6343 ieee80211_sta_reset_conn_monitor(sdata); 6344 6345 return true; 6346 out_err: 6347 eth_zero_addr(sdata->vif.cfg.ap_addr); 6348 return false; 6349 } 6350 6351 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6352 struct ieee80211_mgmt *mgmt, 6353 size_t len) 6354 { 6355 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6356 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6357 u16 capab_info, status_code, aid; 6358 struct ieee80211_elems_parse_params parse_params = { 6359 .bss = NULL, 6360 .link_id = -1, 6361 .from_ap = true, 6362 }; 6363 struct ieee802_11_elems *elems; 6364 int ac; 6365 const u8 *elem_start; 6366 unsigned int elem_len; 6367 bool reassoc; 6368 struct ieee80211_event event = { 6369 .type = MLME_EVENT, 6370 .u.mlme.data = ASSOC_EVENT, 6371 }; 6372 struct ieee80211_prep_tx_info info = {}; 6373 struct cfg80211_rx_assoc_resp_data resp = { 6374 .uapsd_queues = -1, 6375 }; 6376 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6377 unsigned int link_id; 6378 u16 max_aid = IEEE80211_MAX_AID; 6379 6380 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6381 6382 if (!assoc_data) 6383 return; 6384 6385 info.link_id = assoc_data->assoc_link_id; 6386 6387 parse_params.mode = 6388 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6389 6390 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6391 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6392 return; 6393 6394 /* 6395 * AssocResp and ReassocResp have identical structure, so process both 6396 * of them in this function. 6397 */ 6398 6399 if (len < 24 + 6) 6400 return; 6401 6402 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6403 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6404 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6405 if (assoc_data->s1g) { 6406 elem_start = mgmt->u.s1g_assoc_resp.variable; 6407 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6408 } else { 6409 elem_start = mgmt->u.assoc_resp.variable; 6410 } 6411 6412 /* 6413 * Note: this may not be perfect, AP might misbehave - if 6414 * anyone needs to rely on perfect complete notification 6415 * with the exact right subtype, then we need to track what 6416 * we actually transmitted. 6417 */ 6418 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6419 IEEE80211_STYPE_ASSOC_REQ; 6420 6421 if (assoc_data->fils_kek_len && 6422 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6423 return; 6424 6425 elem_len = len - (elem_start - (u8 *)mgmt); 6426 parse_params.start = elem_start; 6427 parse_params.len = elem_len; 6428 elems = ieee802_11_parse_elems_full(&parse_params); 6429 if (!elems) 6430 goto notify_driver; 6431 6432 if (elems->aid_resp) 6433 aid = le16_to_cpu(elems->aid_resp->aid); 6434 else 6435 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6436 6437 /* 6438 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6439 * an S1G STA the 3 MSBs are reserved. 6440 * (802.11-2016 9.4.1.8 AID field). 6441 */ 6442 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6443 6444 sdata_info(sdata, 6445 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6446 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6447 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6448 6449 ifmgd->broken_ap = false; 6450 6451 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6452 elems->timeout_int && 6453 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6454 u32 tu, ms; 6455 6456 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6457 le32_to_cpu(elems->timeout_int->value)); 6458 6459 tu = le32_to_cpu(elems->timeout_int->value); 6460 ms = tu * 1024 / 1000; 6461 sdata_info(sdata, 6462 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6463 assoc_data->ap_addr, tu, ms); 6464 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6465 assoc_data->timeout_started = true; 6466 assoc_data->comeback = true; 6467 if (ms > IEEE80211_ASSOC_TIMEOUT) 6468 run_again(sdata, assoc_data->timeout); 6469 goto notify_driver; 6470 } 6471 6472 if (status_code != WLAN_STATUS_SUCCESS) { 6473 sdata_info(sdata, "%pM denied association (code=%d)\n", 6474 assoc_data->ap_addr, status_code); 6475 event.u.mlme.status = MLME_DENIED; 6476 event.u.mlme.reason = status_code; 6477 drv_event_callback(sdata->local, sdata, &event); 6478 } else { 6479 if (aid == 0 || aid > max_aid) { 6480 sdata_info(sdata, 6481 "invalid AID value %d (out of range), turn off PS\n", 6482 aid); 6483 aid = 0; 6484 ifmgd->broken_ap = true; 6485 } 6486 6487 if (ieee80211_vif_is_mld(&sdata->vif)) { 6488 struct ieee80211_mle_basic_common_info *common; 6489 6490 if (!elems->ml_basic) { 6491 sdata_info(sdata, 6492 "MLO association with %pM but no (basic) multi-link element in response!\n", 6493 assoc_data->ap_addr); 6494 goto abandon_assoc; 6495 } 6496 6497 common = (void *)elems->ml_basic->variable; 6498 6499 if (memcmp(assoc_data->ap_addr, 6500 common->mld_mac_addr, ETH_ALEN)) { 6501 sdata_info(sdata, 6502 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6503 common->mld_mac_addr, 6504 assoc_data->ap_addr); 6505 goto abandon_assoc; 6506 } 6507 6508 sdata->vif.cfg.eml_cap = 6509 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6510 sdata->vif.cfg.eml_med_sync_delay = 6511 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6512 sdata->vif.cfg.mld_capa_op = 6513 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6514 } 6515 6516 sdata->vif.cfg.aid = aid; 6517 sdata->vif.cfg.s1g = assoc_data->s1g; 6518 6519 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6520 elem_start, elem_len)) { 6521 /* oops -- internal error -- send timeout for now */ 6522 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6523 goto notify_driver; 6524 } 6525 event.u.mlme.status = MLME_SUCCESS; 6526 drv_event_callback(sdata->local, sdata, &event); 6527 sdata_info(sdata, "associated\n"); 6528 6529 info.success = 1; 6530 } 6531 6532 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6533 struct ieee80211_link_data *link; 6534 6535 if (!assoc_data->link[link_id].bss) 6536 continue; 6537 6538 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6539 ether_addr_copy(resp.links[link_id].addr, 6540 assoc_data->link[link_id].addr); 6541 resp.links[link_id].status = assoc_data->link[link_id].status; 6542 6543 link = sdata_dereference(sdata->link[link_id], sdata); 6544 if (!link) 6545 continue; 6546 6547 /* get uapsd queues configuration - same for all links */ 6548 resp.uapsd_queues = 0; 6549 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6550 if (link->tx_conf[ac].uapsd) 6551 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6552 } 6553 6554 if (ieee80211_vif_is_mld(&sdata->vif)) { 6555 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6556 resp.ap_mld_addr = ap_mld_addr; 6557 } 6558 6559 ieee80211_destroy_assoc_data(sdata, 6560 status_code == WLAN_STATUS_SUCCESS ? 6561 ASSOC_SUCCESS : 6562 ASSOC_REJECTED); 6563 6564 resp.buf = (u8 *)mgmt; 6565 resp.len = len; 6566 resp.req_ies = ifmgd->assoc_req_ies; 6567 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6568 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6569 notify_driver: 6570 drv_mgd_complete_tx(sdata->local, sdata, &info); 6571 kfree(elems); 6572 return; 6573 abandon_assoc: 6574 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6575 goto notify_driver; 6576 } 6577 6578 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6579 struct ieee80211_mgmt *mgmt, size_t len, 6580 struct ieee80211_rx_status *rx_status) 6581 { 6582 struct ieee80211_sub_if_data *sdata = link->sdata; 6583 struct ieee80211_local *local = sdata->local; 6584 struct ieee80211_bss *bss; 6585 struct ieee80211_channel *channel; 6586 6587 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6588 6589 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6590 ieee80211_rx_status_to_khz(rx_status)); 6591 if (!channel) 6592 return; 6593 6594 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6595 if (bss) { 6596 link->conf->beacon_rate = bss->beacon_rate; 6597 ieee80211_rx_bss_put(local, bss); 6598 } 6599 } 6600 6601 6602 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6603 struct sk_buff *skb) 6604 { 6605 struct ieee80211_sub_if_data *sdata = link->sdata; 6606 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6607 struct ieee80211_if_managed *ifmgd; 6608 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6609 struct ieee80211_channel *channel; 6610 size_t baselen, len = skb->len; 6611 6612 ifmgd = &sdata->u.mgd; 6613 6614 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6615 6616 /* 6617 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6618 * "If a 6 GHz AP receives a Probe Request frame and responds with 6619 * a Probe Response frame [..], the Address 1 field of the Probe 6620 * Response frame shall be set to the broadcast address [..]" 6621 * So, on 6GHz band we should also accept broadcast responses. 6622 */ 6623 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 6624 ieee80211_rx_status_to_khz(rx_status)); 6625 if (!channel) 6626 return; 6627 6628 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6629 (channel->band != NL80211_BAND_6GHZ || 6630 !is_broadcast_ether_addr(mgmt->da))) 6631 return; /* ignore ProbeResp to foreign address */ 6632 6633 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6634 if (baselen > len) 6635 return; 6636 6637 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6638 6639 if (ifmgd->associated && 6640 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6641 ieee80211_reset_ap_probe(sdata); 6642 } 6643 6644 /* 6645 * This is the canonical list of information elements we care about, 6646 * the filter code also gives us all changes to the Microsoft OUI 6647 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6648 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6649 * changes to requested client power. 6650 * 6651 * We implement beacon filtering in software since that means we can 6652 * avoid processing the frame here and in cfg80211, and userspace 6653 * will not be able to tell whether the hardware supports it or not. 6654 * 6655 * XXX: This list needs to be dynamic -- userspace needs to be able to 6656 * add items it requires. It also needs to be able to tell us to 6657 * look out for other vendor IEs. 6658 */ 6659 static const u64 care_about_ies = 6660 (1ULL << WLAN_EID_COUNTRY) | 6661 (1ULL << WLAN_EID_ERP_INFO) | 6662 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6663 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6664 (1ULL << WLAN_EID_HT_CAPABILITY) | 6665 (1ULL << WLAN_EID_HT_OPERATION) | 6666 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6667 6668 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6669 struct ieee80211_if_managed *ifmgd, 6670 struct ieee80211_bss_conf *bss_conf, 6671 struct ieee80211_local *local, 6672 struct ieee80211_rx_status *rx_status) 6673 { 6674 struct ieee80211_sub_if_data *sdata = link->sdata; 6675 6676 /* Track average RSSI from the Beacon frames of the current AP */ 6677 6678 if (!link->u.mgd.tracking_signal_avg) { 6679 link->u.mgd.tracking_signal_avg = true; 6680 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6681 link->u.mgd.last_cqm_event_signal = 0; 6682 link->u.mgd.count_beacon_signal = 1; 6683 link->u.mgd.last_ave_beacon_signal = 0; 6684 } else { 6685 link->u.mgd.count_beacon_signal++; 6686 } 6687 6688 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6689 -rx_status->signal); 6690 6691 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6692 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6693 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6694 int last_sig = link->u.mgd.last_ave_beacon_signal; 6695 struct ieee80211_event event = { 6696 .type = RSSI_EVENT, 6697 }; 6698 6699 /* 6700 * if signal crosses either of the boundaries, invoke callback 6701 * with appropriate parameters 6702 */ 6703 if (sig > ifmgd->rssi_max_thold && 6704 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6705 link->u.mgd.last_ave_beacon_signal = sig; 6706 event.u.rssi.data = RSSI_EVENT_HIGH; 6707 drv_event_callback(local, sdata, &event); 6708 } else if (sig < ifmgd->rssi_min_thold && 6709 (last_sig >= ifmgd->rssi_max_thold || 6710 last_sig == 0)) { 6711 link->u.mgd.last_ave_beacon_signal = sig; 6712 event.u.rssi.data = RSSI_EVENT_LOW; 6713 drv_event_callback(local, sdata, &event); 6714 } 6715 } 6716 6717 if (bss_conf->cqm_rssi_thold && 6718 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6719 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6720 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6721 int last_event = link->u.mgd.last_cqm_event_signal; 6722 int thold = bss_conf->cqm_rssi_thold; 6723 int hyst = bss_conf->cqm_rssi_hyst; 6724 6725 if (sig < thold && 6726 (last_event == 0 || sig < last_event - hyst)) { 6727 link->u.mgd.last_cqm_event_signal = sig; 6728 ieee80211_cqm_rssi_notify( 6729 &sdata->vif, 6730 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6731 sig, GFP_KERNEL); 6732 } else if (sig > thold && 6733 (last_event == 0 || sig > last_event + hyst)) { 6734 link->u.mgd.last_cqm_event_signal = sig; 6735 ieee80211_cqm_rssi_notify( 6736 &sdata->vif, 6737 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6738 sig, GFP_KERNEL); 6739 } 6740 } 6741 6742 if (bss_conf->cqm_rssi_low && 6743 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6744 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6745 int last_event = link->u.mgd.last_cqm_event_signal; 6746 int low = bss_conf->cqm_rssi_low; 6747 int high = bss_conf->cqm_rssi_high; 6748 6749 if (sig < low && 6750 (last_event == 0 || last_event >= low)) { 6751 link->u.mgd.last_cqm_event_signal = sig; 6752 ieee80211_cqm_rssi_notify( 6753 &sdata->vif, 6754 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6755 sig, GFP_KERNEL); 6756 } else if (sig > high && 6757 (last_event == 0 || last_event <= high)) { 6758 link->u.mgd.last_cqm_event_signal = sig; 6759 ieee80211_cqm_rssi_notify( 6760 &sdata->vif, 6761 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6762 sig, GFP_KERNEL); 6763 } 6764 } 6765 } 6766 6767 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6768 struct cfg80211_bss *bss) 6769 { 6770 if (ether_addr_equal(tx_bssid, bss->bssid)) 6771 return true; 6772 if (!bss->transmitted_bss) 6773 return false; 6774 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6775 } 6776 6777 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6778 struct wiphy_work *work) 6779 { 6780 struct ieee80211_sub_if_data *sdata = 6781 container_of(work, struct ieee80211_sub_if_data, 6782 u.mgd.ml_reconf_work.work); 6783 u16 new_valid_links, new_active_links, new_dormant_links; 6784 int ret; 6785 6786 if (!sdata->u.mgd.removed_links) 6787 return; 6788 6789 sdata_info(sdata, 6790 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6791 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6792 6793 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6794 if (new_valid_links == sdata->vif.valid_links) 6795 return; 6796 6797 if (!new_valid_links || 6798 !(new_valid_links & ~sdata->vif.dormant_links)) { 6799 sdata_info(sdata, "No valid links after reconfiguration\n"); 6800 ret = -EINVAL; 6801 goto out; 6802 } 6803 6804 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6805 if (new_active_links != sdata->vif.active_links) { 6806 if (!new_active_links) 6807 new_active_links = 6808 BIT(ffs(new_valid_links & 6809 ~sdata->vif.dormant_links) - 1); 6810 6811 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6812 if (ret) { 6813 sdata_info(sdata, 6814 "Failed setting active links\n"); 6815 goto out; 6816 } 6817 } 6818 6819 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6820 6821 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6822 new_dormant_links); 6823 if (ret) 6824 sdata_info(sdata, "Failed setting valid links\n"); 6825 6826 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6827 6828 out: 6829 if (!ret) 6830 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6831 else 6832 __ieee80211_disconnect(sdata); 6833 6834 sdata->u.mgd.removed_links = 0; 6835 } 6836 6837 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6838 struct ieee802_11_elems *elems) 6839 { 6840 const struct element *sub; 6841 unsigned long removed_links = 0; 6842 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6843 u8 link_id; 6844 u32 delay; 6845 6846 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6847 return; 6848 6849 /* Directly parse the sub elements as the common information doesn't 6850 * hold any useful information. 6851 */ 6852 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6853 elems->ml_reconf_len) { 6854 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6855 u8 *pos = prof->variable; 6856 u16 control; 6857 6858 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6859 continue; 6860 6861 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6862 sub->datalen)) 6863 return; 6864 6865 control = le16_to_cpu(prof->control); 6866 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6867 6868 removed_links |= BIT(link_id); 6869 6870 /* the MAC address should not be included, but handle it */ 6871 if (control & 6872 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6873 pos += 6; 6874 6875 /* According to Draft P802.11be_D3.0, the control should 6876 * include the AP Removal Timer present. If the AP Removal Timer 6877 * is not present assume immediate removal. 6878 */ 6879 if (control & 6880 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6881 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6882 } 6883 6884 removed_links &= sdata->vif.valid_links; 6885 if (!removed_links) { 6886 /* In case the removal was cancelled, abort it */ 6887 if (sdata->u.mgd.removed_links) { 6888 sdata->u.mgd.removed_links = 0; 6889 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6890 &sdata->u.mgd.ml_reconf_work); 6891 } 6892 return; 6893 } 6894 6895 delay = 0; 6896 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6897 struct ieee80211_bss_conf *link_conf = 6898 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6899 u32 link_delay; 6900 6901 if (!link_conf) { 6902 removed_links &= ~BIT(link_id); 6903 continue; 6904 } 6905 6906 if (link_removal_timeout[link_id] < 1) 6907 link_delay = 0; 6908 else 6909 link_delay = link_conf->beacon_int * 6910 (link_removal_timeout[link_id] - 1); 6911 6912 if (!delay) 6913 delay = link_delay; 6914 else 6915 delay = min(delay, link_delay); 6916 } 6917 6918 sdata->u.mgd.removed_links = removed_links; 6919 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6920 &sdata->u.mgd.ml_reconf_work, 6921 TU_TO_JIFFIES(delay)); 6922 } 6923 6924 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6925 u16 active_links, u16 dormant_links, 6926 u16 suspended_links) 6927 { 6928 u64 changed = 0; 6929 int ret; 6930 6931 if (!active_links) { 6932 ret = -EINVAL; 6933 goto out; 6934 } 6935 6936 /* If there is an active negotiated TTLM, it should be discarded by 6937 * the new negotiated/advertised TTLM. 6938 */ 6939 if (sdata->vif.neg_ttlm.valid) { 6940 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6941 sdata->vif.suspended_links = 0; 6942 changed = BSS_CHANGED_MLD_TTLM; 6943 } 6944 6945 if (sdata->vif.active_links != active_links) { 6946 /* usable links are affected when active_links are changed, 6947 * so notify the driver about the status change 6948 */ 6949 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6950 active_links &= sdata->vif.active_links; 6951 if (!active_links) 6952 active_links = 6953 BIT(__ffs(sdata->vif.valid_links & 6954 ~dormant_links)); 6955 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6956 if (ret) { 6957 sdata_info(sdata, "Failed to set TTLM active links\n"); 6958 goto out; 6959 } 6960 } 6961 6962 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6963 dormant_links); 6964 if (ret) { 6965 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6966 goto out; 6967 } 6968 6969 sdata->vif.suspended_links = suspended_links; 6970 if (sdata->vif.suspended_links) 6971 changed |= BSS_CHANGED_MLD_TTLM; 6972 6973 ieee80211_vif_cfg_change_notify(sdata, changed); 6974 6975 out: 6976 if (ret) 6977 ieee80211_disconnect(&sdata->vif, false); 6978 6979 return ret; 6980 } 6981 6982 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6983 struct wiphy_work *work) 6984 { 6985 u16 new_active_links, new_dormant_links; 6986 struct ieee80211_sub_if_data *sdata = 6987 container_of(work, struct ieee80211_sub_if_data, 6988 u.mgd.ttlm_work.work); 6989 6990 new_active_links = sdata->u.mgd.ttlm_info.map & 6991 sdata->vif.valid_links; 6992 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6993 sdata->vif.valid_links; 6994 6995 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6996 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6997 0)) 6998 return; 6999 7000 sdata->u.mgd.ttlm_info.active = true; 7001 sdata->u.mgd.ttlm_info.switch_time = 0; 7002 } 7003 7004 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 7005 { 7006 if (bm_size == 1) 7007 return *data; 7008 else 7009 return get_unaligned_le16(data); 7010 } 7011 7012 static int 7013 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 7014 const struct ieee80211_ttlm_elem *ttlm, 7015 struct ieee80211_adv_ttlm_info *ttlm_info) 7016 { 7017 /* The element size was already validated in 7018 * ieee80211_tid_to_link_map_size_ok() 7019 */ 7020 u8 control, link_map_presence, map_size, tid; 7021 u8 *pos; 7022 7023 memset(ttlm_info, 0, sizeof(*ttlm_info)); 7024 pos = (void *)ttlm->optional; 7025 control = ttlm->control; 7026 7027 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 7028 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 7029 return 0; 7030 7031 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 7032 IEEE80211_TTLM_DIRECTION_BOTH) { 7033 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 7034 return -EINVAL; 7035 } 7036 7037 link_map_presence = *pos; 7038 pos++; 7039 7040 ttlm_info->switch_time = get_unaligned_le16(pos); 7041 7042 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 7043 * by 1. 7044 */ 7045 if (!ttlm_info->switch_time) 7046 ttlm_info->switch_time = 1; 7047 7048 pos += 2; 7049 7050 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 7051 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 7052 pos += 3; 7053 } 7054 7055 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7056 map_size = 1; 7057 else 7058 map_size = 2; 7059 7060 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 7061 * not advertise a TID-to-link mapping that does not map all TIDs to the 7062 * same link set, reject frame if not all links have mapping 7063 */ 7064 if (link_map_presence != 0xff) { 7065 sdata_info(sdata, 7066 "Invalid advertised T2L mapping presence indicator\n"); 7067 return -EINVAL; 7068 } 7069 7070 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7071 if (!ttlm_info->map) { 7072 sdata_info(sdata, 7073 "Invalid advertised T2L map for TID 0\n"); 7074 return -EINVAL; 7075 } 7076 7077 pos += map_size; 7078 7079 for (tid = 1; tid < 8; tid++) { 7080 u16 map = ieee80211_get_ttlm(map_size, pos); 7081 7082 if (map != ttlm_info->map) { 7083 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7084 tid); 7085 return -EINVAL; 7086 } 7087 7088 pos += map_size; 7089 } 7090 return 0; 7091 } 7092 7093 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7094 struct ieee802_11_elems *elems, 7095 u64 beacon_ts) 7096 { 7097 u8 i; 7098 int ret; 7099 7100 if (!ieee80211_vif_is_mld(&sdata->vif)) 7101 return; 7102 7103 if (!elems->ttlm_num) { 7104 if (sdata->u.mgd.ttlm_info.switch_time) { 7105 /* if a planned TID-to-link mapping was cancelled - 7106 * abort it 7107 */ 7108 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7109 &sdata->u.mgd.ttlm_work); 7110 } else if (sdata->u.mgd.ttlm_info.active) { 7111 /* if no TID-to-link element, set to default mapping in 7112 * which all TIDs are mapped to all setup links 7113 */ 7114 ret = ieee80211_vif_set_links(sdata, 7115 sdata->vif.valid_links, 7116 0); 7117 if (ret) { 7118 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7119 return; 7120 } 7121 ieee80211_vif_cfg_change_notify(sdata, 7122 BSS_CHANGED_MLD_VALID_LINKS); 7123 } 7124 memset(&sdata->u.mgd.ttlm_info, 0, 7125 sizeof(sdata->u.mgd.ttlm_info)); 7126 return; 7127 } 7128 7129 for (i = 0; i < elems->ttlm_num; i++) { 7130 struct ieee80211_adv_ttlm_info ttlm_info; 7131 u32 res; 7132 7133 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7134 &ttlm_info); 7135 7136 if (res) { 7137 __ieee80211_disconnect(sdata); 7138 return; 7139 } 7140 7141 if (ttlm_info.switch_time) { 7142 u16 beacon_ts_tu, st_tu, delay; 7143 u32 delay_jiffies; 7144 u64 mask; 7145 7146 /* The t2l map switch time is indicated with a partial 7147 * TSF value (bits 10 to 25), get the partial beacon TS 7148 * as well, and calc the delay to the start time. 7149 */ 7150 mask = GENMASK_ULL(25, 10); 7151 beacon_ts_tu = (beacon_ts & mask) >> 10; 7152 st_tu = ttlm_info.switch_time; 7153 delay = st_tu - beacon_ts_tu; 7154 7155 /* 7156 * If the switch time is far in the future, then it 7157 * could also be the previous switch still being 7158 * announced. 7159 * We can simply ignore it for now, if it is a future 7160 * switch the AP will continue to announce it anyway. 7161 */ 7162 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7163 return; 7164 7165 delay_jiffies = TU_TO_JIFFIES(delay); 7166 7167 /* Link switching can take time, so schedule it 7168 * 100ms before to be ready on time 7169 */ 7170 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7171 delay_jiffies -= 7172 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7173 else 7174 delay_jiffies = 0; 7175 7176 sdata->u.mgd.ttlm_info = ttlm_info; 7177 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7178 &sdata->u.mgd.ttlm_work); 7179 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7180 &sdata->u.mgd.ttlm_work, 7181 delay_jiffies); 7182 return; 7183 } 7184 } 7185 } 7186 7187 static void 7188 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7189 int reporting_link_id, 7190 struct ieee802_11_elems *elems) 7191 { 7192 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7193 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7194 const struct element *sub; 7195 const u8 *subelems; 7196 size_t subelems_len; 7197 u8 common_size; 7198 int link_id; 7199 7200 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7201 return; 7202 7203 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7204 subelems = (u8 *)elems->ml_basic + common_size; 7205 subelems_len = elems->ml_basic_len - common_size; 7206 7207 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7208 subelems, subelems_len) { 7209 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7210 struct ieee80211_link_data *link; 7211 ssize_t len; 7212 7213 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7214 sub->datalen)) 7215 continue; 7216 7217 link_id = le16_get_bits(prof->control, 7218 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7219 /* need a valid link ID, but also not our own, both AP bugs */ 7220 if (link_id == reporting_link_id || 7221 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7222 continue; 7223 7224 link = sdata_dereference(sdata->link[link_id], sdata); 7225 if (!link) 7226 continue; 7227 7228 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7229 NULL, 0, 7230 IEEE80211_MLE_SUBELEM_FRAGMENT); 7231 if (WARN_ON(len < 0)) 7232 continue; 7233 7234 sta_profiles[link_id] = sub; 7235 sta_profiles_len[link_id] = len; 7236 } 7237 7238 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7239 struct ieee80211_mle_per_sta_profile *prof; 7240 struct ieee802_11_elems *prof_elems; 7241 struct ieee80211_link_data *link; 7242 ssize_t len; 7243 7244 if (link_id == reporting_link_id) 7245 continue; 7246 7247 link = sdata_dereference(sdata->link[link_id], sdata); 7248 if (!link) 7249 continue; 7250 7251 if (!sta_profiles[link_id]) { 7252 prof_elems = NULL; 7253 goto handle; 7254 } 7255 7256 /* we can defragment in-place, won't use the buffer again */ 7257 len = cfg80211_defragment_element(sta_profiles[link_id], 7258 subelems, subelems_len, 7259 (void *)sta_profiles[link_id], 7260 sta_profiles_len[link_id], 7261 IEEE80211_MLE_SUBELEM_FRAGMENT); 7262 if (WARN_ON(len != sta_profiles_len[link_id])) 7263 continue; 7264 7265 prof = (void *)sta_profiles[link_id]; 7266 prof_elems = ieee802_11_parse_elems(prof->variable + 7267 (prof->sta_info_len - 1), 7268 len - 7269 (prof->sta_info_len - 1), 7270 false, NULL); 7271 7272 /* memory allocation failed - let's hope that's transient */ 7273 if (!prof_elems) 7274 continue; 7275 7276 handle: 7277 /* 7278 * FIXME: the timings here are obviously incorrect, 7279 * but only older Intel drivers seem to care, and 7280 * those don't have MLO. If you really need this, 7281 * the problem is having to calculate it with the 7282 * TSF offset etc. The device_timestamp is still 7283 * correct, of course. 7284 */ 7285 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7286 IEEE80211_CSA_SOURCE_OTHER_LINK); 7287 kfree(prof_elems); 7288 } 7289 } 7290 7291 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7292 const struct ieee802_11_elems *elems) 7293 { 7294 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7295 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7296 7297 if (!elems->ssid) 7298 return false; 7299 7300 /* hidden SSID: zero length */ 7301 if (elems->ssid_len == 0) 7302 return false; 7303 7304 if (elems->ssid_len != cfg->ssid_len) 7305 return true; 7306 7307 /* hidden SSID: zeroed out */ 7308 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7309 return false; 7310 7311 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7312 } 7313 7314 static bool 7315 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7316 struct ieee80211_mgmt *mgmt, 7317 struct ieee80211_rx_status *rx_status, 7318 struct ieee80211_chanctx_conf *chanctx) 7319 { 7320 u32 pri_2mhz_khz; 7321 struct ieee80211_channel *s1g_sibling_1mhz; 7322 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7323 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7324 7325 if (rx_khz == pri_khz) 7326 return true; 7327 7328 if (!chanctx->def.s1g_primary_2mhz) 7329 return false; 7330 7331 /* 7332 * If we have an S1G interface with a 2MHz primary, beacons are 7333 * sent on the center frequency of the 2MHz primary. Find the sibling 7334 * 1MHz channel and calculate the 2MHz primary center frequency. 7335 */ 7336 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7337 &chanctx->def); 7338 if (!s1g_sibling_1mhz) 7339 return false; 7340 7341 pri_2mhz_khz = 7342 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7343 return rx_khz == pri_2mhz_khz; 7344 } 7345 7346 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7347 struct ieee80211_hdr *hdr, size_t len, 7348 struct ieee80211_rx_status *rx_status) 7349 { 7350 struct ieee80211_sub_if_data *sdata = link->sdata; 7351 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7352 struct ieee80211_bss_conf *bss_conf = link->conf; 7353 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7354 struct ieee80211_mgmt *mgmt = (void *) hdr; 7355 struct ieee80211_ext *ext = NULL; 7356 size_t baselen; 7357 struct ieee802_11_elems *elems; 7358 struct ieee80211_local *local = sdata->local; 7359 struct ieee80211_chanctx_conf *chanctx_conf; 7360 struct ieee80211_supported_band *sband; 7361 struct ieee80211_channel *chan; 7362 struct link_sta_info *link_sta; 7363 struct sta_info *sta; 7364 u64 changed = 0; 7365 bool erp_valid; 7366 u8 erp_value = 0; 7367 u32 ncrc = 0; 7368 u8 *bssid, *variable = mgmt->u.beacon.variable; 7369 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7370 struct ieee80211_elems_parse_params parse_params = { 7371 .mode = link->u.mgd.conn.mode, 7372 .link_id = -1, 7373 .from_ap = true, 7374 }; 7375 7376 lockdep_assert_wiphy(local->hw.wiphy); 7377 7378 /* Process beacon from the current BSS */ 7379 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7380 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7381 ext = (void *)mgmt; 7382 variable = ext->u.s1g_beacon.variable + 7383 ieee80211_s1g_optional_len(ext->frame_control); 7384 } 7385 7386 baselen = (u8 *) variable - (u8 *) mgmt; 7387 if (baselen > len) 7388 return; 7389 7390 parse_params.start = variable; 7391 parse_params.len = len - baselen; 7392 7393 rcu_read_lock(); 7394 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7395 if (!chanctx_conf) { 7396 rcu_read_unlock(); 7397 return; 7398 } 7399 7400 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7401 chanctx_conf)) { 7402 rcu_read_unlock(); 7403 return; 7404 } 7405 chan = chanctx_conf->def.chan; 7406 rcu_read_unlock(); 7407 7408 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7409 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7410 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7411 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7412 elems = ieee802_11_parse_elems_full(&parse_params); 7413 if (!elems) 7414 return; 7415 7416 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7417 7418 if (elems->dtim_period) 7419 link->u.mgd.dtim_period = elems->dtim_period; 7420 link->u.mgd.have_beacon = true; 7421 ifmgd->assoc_data->need_beacon = false; 7422 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7423 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7424 bss_conf->sync_tsf = 7425 le64_to_cpu(mgmt->u.beacon.timestamp); 7426 bss_conf->sync_device_ts = 7427 rx_status->device_timestamp; 7428 bss_conf->sync_dtim_count = elems->dtim_count; 7429 } 7430 7431 if (elems->mbssid_config_ie) 7432 bss_conf->profile_periodicity = 7433 elems->mbssid_config_ie->profile_periodicity; 7434 else 7435 bss_conf->profile_periodicity = 0; 7436 7437 if (elems->ext_capab_len >= 11 && 7438 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7439 bss_conf->ema_ap = true; 7440 else 7441 bss_conf->ema_ap = false; 7442 7443 /* continue assoc process */ 7444 ifmgd->assoc_data->timeout = jiffies; 7445 ifmgd->assoc_data->timeout_started = true; 7446 run_again(sdata, ifmgd->assoc_data->timeout); 7447 kfree(elems); 7448 return; 7449 } 7450 7451 if (!ifmgd->associated || 7452 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7453 return; 7454 bssid = link->u.mgd.bssid; 7455 7456 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7457 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7458 local, rx_status); 7459 7460 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7461 mlme_dbg_ratelimited(sdata, 7462 "cancelling AP probe due to a received beacon\n"); 7463 ieee80211_reset_ap_probe(sdata); 7464 } 7465 7466 /* 7467 * Push the beacon loss detection into the future since 7468 * we are processing a beacon from the AP just now. 7469 */ 7470 ieee80211_sta_reset_beacon_monitor(sdata); 7471 7472 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7473 * element (which carries the beacon interval). Don't forget to add a 7474 * bit to care_about_ies[] above if mac80211 is interested in a 7475 * changing S1G element. 7476 */ 7477 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7478 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7479 parse_params.bss = bss_conf->bss; 7480 parse_params.filter = care_about_ies; 7481 parse_params.crc = ncrc; 7482 elems = ieee802_11_parse_elems_full(&parse_params); 7483 if (!elems) 7484 return; 7485 7486 if (rx_status->flag & RX_FLAG_DECRYPTED && 7487 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7488 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7489 sdata->vif.cfg.ap_addr); 7490 __ieee80211_disconnect(sdata); 7491 return; 7492 } 7493 7494 ncrc = elems->crc; 7495 7496 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7497 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7498 vif_cfg->s1g)) { 7499 if (local->hw.conf.dynamic_ps_timeout > 0) { 7500 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7501 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7502 ieee80211_hw_config(local, -1, 7503 IEEE80211_CONF_CHANGE_PS); 7504 } 7505 ieee80211_send_nullfunc(local, sdata, false); 7506 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7507 local->pspolling = true; 7508 7509 /* 7510 * Here is assumed that the driver will be 7511 * able to send ps-poll frame and receive a 7512 * response even though power save mode is 7513 * enabled, but some drivers might require 7514 * to disable power save here. This needs 7515 * to be investigated. 7516 */ 7517 ieee80211_send_pspoll(local, sdata); 7518 } 7519 } 7520 7521 if (sdata->vif.p2p || 7522 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7523 struct ieee80211_p2p_noa_attr noa = {}; 7524 int ret; 7525 7526 ret = cfg80211_get_p2p_attr(variable, 7527 len - baselen, 7528 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7529 (u8 *) &noa, sizeof(noa)); 7530 if (ret >= 2) { 7531 if (link->u.mgd.p2p_noa_index != noa.index) { 7532 /* valid noa_attr and index changed */ 7533 link->u.mgd.p2p_noa_index = noa.index; 7534 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7535 changed |= BSS_CHANGED_P2P_PS; 7536 /* 7537 * make sure we update all information, the CRC 7538 * mechanism doesn't look at P2P attributes. 7539 */ 7540 link->u.mgd.beacon_crc_valid = false; 7541 } 7542 } else if (link->u.mgd.p2p_noa_index != -1) { 7543 /* noa_attr not found and we had valid noa_attr before */ 7544 link->u.mgd.p2p_noa_index = -1; 7545 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7546 changed |= BSS_CHANGED_P2P_PS; 7547 link->u.mgd.beacon_crc_valid = false; 7548 } 7549 } 7550 7551 /* 7552 * Update beacon timing and dtim count on every beacon appearance. This 7553 * will allow the driver to use the most updated values. Do it before 7554 * comparing this one with last received beacon. 7555 * IMPORTANT: These parameters would possibly be out of sync by the time 7556 * the driver will use them. The synchronized view is currently 7557 * guaranteed only in certain callbacks. 7558 */ 7559 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7560 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7561 bss_conf->sync_tsf = 7562 le64_to_cpu(mgmt->u.beacon.timestamp); 7563 bss_conf->sync_device_ts = 7564 rx_status->device_timestamp; 7565 bss_conf->sync_dtim_count = elems->dtim_count; 7566 } 7567 7568 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7569 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7570 parse_params.start, 7571 parse_params.len))) 7572 goto free; 7573 link->u.mgd.beacon_crc = ncrc; 7574 link->u.mgd.beacon_crc_valid = true; 7575 7576 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7577 7578 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7579 rx_status->device_timestamp, 7580 elems, elems, 7581 IEEE80211_CSA_SOURCE_BEACON); 7582 7583 /* note that after this elems->ml_basic can no longer be used fully */ 7584 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7585 7586 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7587 7588 if (!sdata->u.mgd.epcs.enabled && 7589 !link->u.mgd.disable_wmm_tracking && 7590 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7591 elems->wmm_param_len, 7592 elems->mu_edca_param_set)) 7593 changed |= BSS_CHANGED_QOS; 7594 7595 /* 7596 * If we haven't had a beacon before, tell the driver about the 7597 * DTIM period (and beacon timing if desired) now. 7598 */ 7599 if (!link->u.mgd.have_beacon) { 7600 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7601 bss_conf->dtim_period = elems->dtim_period ?: 1; 7602 7603 changed |= BSS_CHANGED_BEACON_INFO; 7604 link->u.mgd.have_beacon = true; 7605 7606 ieee80211_recalc_ps(local); 7607 7608 ieee80211_recalc_ps_vif(sdata); 7609 } 7610 7611 if (elems->erp_info) { 7612 erp_valid = true; 7613 erp_value = elems->erp_info[0]; 7614 } else { 7615 erp_valid = false; 7616 } 7617 7618 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7619 changed |= ieee80211_handle_bss_capability(link, 7620 le16_to_cpu(mgmt->u.beacon.capab_info), 7621 erp_valid, erp_value); 7622 7623 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7624 if (WARN_ON(!sta)) { 7625 goto free; 7626 } 7627 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7628 lockdep_is_held(&local->hw.wiphy->mtx)); 7629 if (WARN_ON(!link_sta)) { 7630 goto free; 7631 } 7632 7633 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7634 goto free; 7635 7636 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7637 7638 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7639 7640 if (ieee80211_config_bw(link, elems, true, &changed, 7641 IEEE80211_STYPE_BEACON)) { 7642 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7643 WLAN_REASON_DEAUTH_LEAVING, 7644 true, deauth_buf); 7645 ieee80211_report_disconnect(sdata, deauth_buf, 7646 sizeof(deauth_buf), true, 7647 WLAN_REASON_DEAUTH_LEAVING, 7648 false); 7649 goto free; 7650 } 7651 7652 if (elems->opmode_notif) 7653 ieee80211_vht_handle_opmode(sdata, link_sta, 7654 *elems->opmode_notif, 7655 rx_status->band); 7656 7657 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7658 elems->country_elem, 7659 elems->country_elem_len, 7660 elems->pwr_constr_elem, 7661 elems->cisco_dtpc_elem); 7662 7663 ieee80211_ml_reconfiguration(sdata, elems); 7664 ieee80211_process_adv_ttlm(sdata, elems, 7665 le64_to_cpu(mgmt->u.beacon.timestamp)); 7666 7667 ieee80211_link_info_change_notify(sdata, link, changed); 7668 free: 7669 kfree(elems); 7670 } 7671 7672 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7673 struct ieee80211_neg_ttlm neg_ttlm) 7674 { 7675 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7676 u8 i; 7677 7678 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7679 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7680 7681 /* If there is an active TTLM, unset previously suspended links */ 7682 if (sdata->vif.neg_ttlm.valid) 7683 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7684 7685 /* exclude links that are already disabled by advertised TTLM */ 7686 new_active_links = 7687 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7688 new_suspended_links = 7689 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7690 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7691 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7692 new_dormant_links, new_suspended_links)) 7693 return; 7694 7695 sdata->vif.neg_ttlm = neg_ttlm; 7696 sdata->vif.neg_ttlm.valid = true; 7697 } 7698 7699 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7700 struct wiphy_work *work) 7701 { 7702 struct ieee80211_sub_if_data *sdata = 7703 container_of(work, struct ieee80211_sub_if_data, 7704 u.mgd.neg_ttlm_timeout_work.work); 7705 7706 sdata_info(sdata, 7707 "No negotiated TTLM response from AP, disconnecting.\n"); 7708 7709 __ieee80211_disconnect(sdata); 7710 } 7711 7712 static void 7713 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7714 struct ieee80211_neg_ttlm *neg_ttlm) 7715 { 7716 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7717 7718 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7719 sizeof(neg_ttlm->downlink))) { 7720 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7721 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7722 } else { 7723 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7724 } 7725 7726 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7727 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7728 __le16 map; 7729 7730 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7731 7732 pos = skb_put(skb, len + 2); 7733 *pos++ = WLAN_EID_EXTENSION; 7734 len_pos = pos++; 7735 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7736 *pos++ = direction[i]; 7737 map_ind_pos = pos++; 7738 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7739 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7740 cpu_to_le16(neg_ttlm->uplink[tid]) : 7741 cpu_to_le16(neg_ttlm->downlink[tid]); 7742 if (!map) 7743 continue; 7744 7745 len += 2; 7746 map_ind |= BIT(tid); 7747 skb_put_data(skb, &map, sizeof(map)); 7748 } 7749 7750 *map_ind_pos = map_ind; 7751 *len_pos = len; 7752 7753 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7754 break; 7755 } 7756 } 7757 7758 static void 7759 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7760 struct ieee80211_neg_ttlm *neg_ttlm, 7761 u8 dialog_token) 7762 { 7763 struct ieee80211_local *local = sdata->local; 7764 struct ieee80211_mgmt *mgmt; 7765 struct sk_buff *skb; 7766 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7767 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7768 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7769 7770 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7771 if (!skb) 7772 return; 7773 7774 skb_reserve(skb, local->tx_headroom); 7775 mgmt = skb_put_zero(skb, hdr_len); 7776 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7777 IEEE80211_STYPE_ACTION); 7778 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7779 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7780 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7781 7782 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7783 mgmt->u.action.u.ttlm_req.action_code = 7784 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7785 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7786 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7787 ieee80211_tx_skb(sdata, skb); 7788 } 7789 7790 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7791 struct cfg80211_ttlm_params *params) 7792 { 7793 struct ieee80211_neg_ttlm neg_ttlm = {}; 7794 u8 i; 7795 7796 if (!ieee80211_vif_is_mld(&sdata->vif) || 7797 !(sdata->vif.cfg.mld_capa_op & 7798 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7799 return -EINVAL; 7800 7801 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7802 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7803 (params->ulink[i] & ~sdata->vif.valid_links)) 7804 return -EINVAL; 7805 7806 neg_ttlm.downlink[i] = params->dlink[i]; 7807 neg_ttlm.uplink[i] = params->ulink[i]; 7808 } 7809 7810 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7811 NEG_TTLM_RES_ACCEPT) 7812 return -EINVAL; 7813 7814 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7815 sdata->u.mgd.dialog_token_alloc++; 7816 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7817 sdata->u.mgd.dialog_token_alloc); 7818 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7819 &sdata->u.mgd.neg_ttlm_timeout_work); 7820 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7821 &sdata->u.mgd.neg_ttlm_timeout_work, 7822 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7823 return 0; 7824 } 7825 7826 static void 7827 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7828 enum ieee80211_neg_ttlm_res ttlm_res, 7829 u8 dialog_token, 7830 struct ieee80211_neg_ttlm *neg_ttlm) 7831 { 7832 struct ieee80211_local *local = sdata->local; 7833 struct ieee80211_mgmt *mgmt; 7834 struct sk_buff *skb; 7835 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7836 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7837 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7838 u16 status_code; 7839 7840 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7841 if (!skb) 7842 return; 7843 7844 skb_reserve(skb, local->tx_headroom); 7845 mgmt = skb_put_zero(skb, hdr_len); 7846 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7847 IEEE80211_STYPE_ACTION); 7848 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7849 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7850 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7851 7852 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7853 mgmt->u.action.u.ttlm_res.action_code = 7854 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7855 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7856 switch (ttlm_res) { 7857 default: 7858 WARN_ON(1); 7859 fallthrough; 7860 case NEG_TTLM_RES_REJECT: 7861 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7862 break; 7863 case NEG_TTLM_RES_ACCEPT: 7864 status_code = WLAN_STATUS_SUCCESS; 7865 break; 7866 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7867 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7868 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7869 break; 7870 } 7871 7872 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7873 ieee80211_tx_skb(sdata, skb); 7874 } 7875 7876 static int 7877 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7878 const struct ieee80211_ttlm_elem *ttlm, 7879 struct ieee80211_neg_ttlm *neg_ttlm, 7880 u8 *direction) 7881 { 7882 u8 control, link_map_presence, map_size, tid; 7883 u8 *pos; 7884 7885 /* The element size was already validated in 7886 * ieee80211_tid_to_link_map_size_ok() 7887 */ 7888 pos = (void *)ttlm->optional; 7889 7890 control = ttlm->control; 7891 7892 /* mapping switch time and expected duration fields are not expected 7893 * in case of negotiated TTLM 7894 */ 7895 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7896 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7897 mlme_dbg(sdata, 7898 "Invalid TTLM element in negotiated TTLM request\n"); 7899 return -EINVAL; 7900 } 7901 7902 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7903 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7904 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7905 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7906 } 7907 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7908 return 0; 7909 } 7910 7911 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7912 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7913 *direction != IEEE80211_TTLM_DIRECTION_UP && 7914 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7915 return -EINVAL; 7916 7917 link_map_presence = *pos; 7918 pos++; 7919 7920 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7921 map_size = 1; 7922 else 7923 map_size = 2; 7924 7925 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7926 u16 map; 7927 7928 if (link_map_presence & BIT(tid)) { 7929 map = ieee80211_get_ttlm(map_size, pos); 7930 if (!map) { 7931 mlme_dbg(sdata, 7932 "No active links for TID %d", tid); 7933 return -EINVAL; 7934 } 7935 } else { 7936 map = 0; 7937 } 7938 7939 switch (*direction) { 7940 case IEEE80211_TTLM_DIRECTION_BOTH: 7941 neg_ttlm->downlink[tid] = map; 7942 neg_ttlm->uplink[tid] = map; 7943 break; 7944 case IEEE80211_TTLM_DIRECTION_DOWN: 7945 neg_ttlm->downlink[tid] = map; 7946 break; 7947 case IEEE80211_TTLM_DIRECTION_UP: 7948 neg_ttlm->uplink[tid] = map; 7949 break; 7950 default: 7951 return -EINVAL; 7952 } 7953 pos += map_size; 7954 } 7955 return 0; 7956 } 7957 7958 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7959 struct ieee80211_mgmt *mgmt, size_t len) 7960 { 7961 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7962 size_t ies_len; 7963 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7964 struct ieee802_11_elems *elems = NULL; 7965 struct ieee80211_neg_ttlm neg_ttlm = {}; 7966 7967 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7968 7969 if (!ieee80211_vif_is_mld(&sdata->vif)) 7970 return; 7971 7972 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7973 ies_len = len - offsetof(struct ieee80211_mgmt, 7974 u.action.u.ttlm_req.variable); 7975 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7976 ies_len, true, NULL); 7977 if (!elems) { 7978 ttlm_res = NEG_TTLM_RES_REJECT; 7979 goto out; 7980 } 7981 7982 for (i = 0; i < elems->ttlm_num; i++) { 7983 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7984 &neg_ttlm, &direction[i]) || 7985 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7986 elems->ttlm_num != 1)) { 7987 ttlm_res = NEG_TTLM_RES_REJECT; 7988 goto out; 7989 } 7990 } 7991 7992 if (!elems->ttlm_num || 7993 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7994 ttlm_res = NEG_TTLM_RES_REJECT; 7995 goto out; 7996 } 7997 7998 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7999 if ((neg_ttlm.downlink[i] && 8000 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 8001 (neg_ttlm.uplink[i] && 8002 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 8003 ttlm_res = NEG_TTLM_RES_REJECT; 8004 goto out; 8005 } 8006 } 8007 8008 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8009 8010 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8011 goto out; 8012 8013 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8014 out: 8015 kfree(elems); 8016 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8017 } 8018 8019 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8020 struct ieee80211_mgmt *mgmt, size_t len) 8021 { 8022 if (!ieee80211_vif_is_mld(&sdata->vif) || 8023 mgmt->u.action.u.ttlm_req.dialog_token != 8024 sdata->u.mgd.dialog_token_alloc) 8025 return; 8026 8027 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8028 &sdata->u.mgd.neg_ttlm_timeout_work); 8029 8030 /* MLD station sends a TID to link mapping request, mainly to handle 8031 * BTM (BSS transition management) request, in which case it needs to 8032 * restrict the active links set. 8033 * In this case it's not expected that the MLD AP will reject the 8034 * negotiated TTLM request. 8035 * This can be better implemented in the future, to handle request 8036 * rejections. 8037 */ 8038 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8039 __ieee80211_disconnect(sdata); 8040 } 8041 8042 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8043 { 8044 u16 new_dormant_links; 8045 8046 if (!sdata->vif.neg_ttlm.valid) 8047 return; 8048 8049 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8050 new_dormant_links = 8051 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8052 sdata->vif.suspended_links = 0; 8053 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8054 new_dormant_links); 8055 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8056 BSS_CHANGED_MLD_VALID_LINKS); 8057 } 8058 8059 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8060 struct wiphy_work *work) 8061 { 8062 struct ieee80211_sub_if_data *sdata = 8063 container_of(work, struct ieee80211_sub_if_data, 8064 u.mgd.teardown_ttlm_work); 8065 8066 ieee80211_process_ttlm_teardown(sdata); 8067 } 8068 8069 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8070 { 8071 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8072 struct ieee80211_local *local = sdata->local; 8073 struct ieee80211_mgmt *mgmt; 8074 struct sk_buff *skb; 8075 int frame_len = offsetofend(struct ieee80211_mgmt, 8076 u.action.u.ttlm_tear_down); 8077 struct ieee80211_tx_info *info; 8078 8079 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8080 if (!skb) 8081 return; 8082 8083 skb_reserve(skb, local->hw.extra_tx_headroom); 8084 mgmt = skb_put_zero(skb, frame_len); 8085 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8086 IEEE80211_STYPE_ACTION); 8087 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8088 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8089 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8090 8091 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8092 mgmt->u.action.u.ttlm_tear_down.action_code = 8093 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8094 8095 info = IEEE80211_SKB_CB(skb); 8096 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8097 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8098 ieee80211_tx_skb(sdata, skb); 8099 } 8100 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8101 8102 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8103 struct sk_buff *skb) 8104 { 8105 struct ieee80211_link_data *link = &sdata->deflink; 8106 struct ieee80211_rx_status *rx_status; 8107 struct ieee80211_hdr *hdr; 8108 u16 fc; 8109 8110 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8111 8112 rx_status = (struct ieee80211_rx_status *) skb->cb; 8113 hdr = (struct ieee80211_hdr *) skb->data; 8114 fc = le16_to_cpu(hdr->frame_control); 8115 8116 switch (fc & IEEE80211_FCTL_STYPE) { 8117 case IEEE80211_STYPE_S1G_BEACON: 8118 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8119 break; 8120 } 8121 } 8122 8123 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8124 struct sk_buff *skb) 8125 { 8126 struct ieee80211_link_data *link = &sdata->deflink; 8127 struct ieee80211_rx_status *rx_status; 8128 struct ieee802_11_elems *elems; 8129 struct ieee80211_mgmt *mgmt; 8130 u16 fc; 8131 int ies_len; 8132 8133 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8134 8135 rx_status = (struct ieee80211_rx_status *) skb->cb; 8136 mgmt = (struct ieee80211_mgmt *) skb->data; 8137 fc = le16_to_cpu(mgmt->frame_control); 8138 8139 if (rx_status->link_valid) { 8140 link = sdata_dereference(sdata->link[rx_status->link_id], 8141 sdata); 8142 if (!link) 8143 return; 8144 } 8145 8146 switch (fc & IEEE80211_FCTL_STYPE) { 8147 case IEEE80211_STYPE_BEACON: 8148 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8149 skb->len, rx_status); 8150 break; 8151 case IEEE80211_STYPE_PROBE_RESP: 8152 ieee80211_rx_mgmt_probe_resp(link, skb); 8153 break; 8154 case IEEE80211_STYPE_AUTH: 8155 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8156 break; 8157 case IEEE80211_STYPE_DEAUTH: 8158 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8159 break; 8160 case IEEE80211_STYPE_DISASSOC: 8161 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8162 break; 8163 case IEEE80211_STYPE_ASSOC_RESP: 8164 case IEEE80211_STYPE_REASSOC_RESP: 8165 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8166 break; 8167 case IEEE80211_STYPE_ACTION: 8168 if (!sdata->u.mgd.associated || 8169 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8170 break; 8171 8172 switch (mgmt->u.action.category) { 8173 case WLAN_CATEGORY_SPECTRUM_MGMT: 8174 ies_len = skb->len - 8175 offsetof(struct ieee80211_mgmt, 8176 u.action.u.chan_switch.variable); 8177 8178 if (ies_len < 0) 8179 break; 8180 8181 /* CSA IE cannot be overridden, no need for BSSID */ 8182 elems = ieee802_11_parse_elems( 8183 mgmt->u.action.u.chan_switch.variable, 8184 ies_len, true, NULL); 8185 8186 if (elems && !elems->parse_error) { 8187 enum ieee80211_csa_source src = 8188 IEEE80211_CSA_SOURCE_PROT_ACTION; 8189 8190 ieee80211_sta_process_chanswitch(link, 8191 rx_status->mactime, 8192 rx_status->device_timestamp, 8193 elems, elems, 8194 src); 8195 } 8196 kfree(elems); 8197 break; 8198 case WLAN_CATEGORY_PUBLIC: 8199 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8200 ies_len = skb->len - 8201 offsetof(struct ieee80211_mgmt, 8202 u.action.u.ext_chan_switch.variable); 8203 8204 if (ies_len < 0) 8205 break; 8206 8207 /* 8208 * extended CSA IE can't be overridden, no need for 8209 * BSSID 8210 */ 8211 elems = ieee802_11_parse_elems( 8212 mgmt->u.action.u.ext_chan_switch.variable, 8213 ies_len, true, NULL); 8214 8215 if (elems && !elems->parse_error) { 8216 enum ieee80211_csa_source src; 8217 8218 if (mgmt->u.action.category == 8219 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8220 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8221 else 8222 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8223 8224 /* for the handling code pretend it was an IE */ 8225 elems->ext_chansw_ie = 8226 &mgmt->u.action.u.ext_chan_switch.data; 8227 8228 ieee80211_sta_process_chanswitch(link, 8229 rx_status->mactime, 8230 rx_status->device_timestamp, 8231 elems, elems, 8232 src); 8233 } 8234 8235 kfree(elems); 8236 break; 8237 } 8238 break; 8239 } 8240 } 8241 8242 static void ieee80211_sta_timer(struct timer_list *t) 8243 { 8244 struct ieee80211_sub_if_data *sdata = 8245 timer_container_of(sdata, t, u.mgd.timer); 8246 8247 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8248 } 8249 8250 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8251 u8 reason, bool tx) 8252 { 8253 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8254 8255 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8256 tx, frame_buf); 8257 8258 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8259 reason, false); 8260 } 8261 8262 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8263 { 8264 struct ieee80211_local *local = sdata->local; 8265 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8266 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8267 u32 tx_flags = 0; 8268 u16 trans = 1; 8269 u16 status = 0; 8270 struct ieee80211_prep_tx_info info = { 8271 .subtype = IEEE80211_STYPE_AUTH, 8272 }; 8273 8274 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8275 8276 if (WARN_ON_ONCE(!auth_data)) 8277 return -EINVAL; 8278 8279 auth_data->tries++; 8280 8281 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8282 sdata_info(sdata, "authentication with %pM timed out\n", 8283 auth_data->ap_addr); 8284 8285 /* 8286 * Most likely AP is not in the range so remove the 8287 * bss struct for that AP. 8288 */ 8289 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8290 8291 return -ETIMEDOUT; 8292 } 8293 8294 if (auth_data->algorithm == WLAN_AUTH_SAE) 8295 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8296 8297 info.link_id = auth_data->link_id; 8298 drv_mgd_prepare_tx(local, sdata, &info); 8299 8300 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8301 auth_data->ap_addr, auth_data->tries, 8302 IEEE80211_AUTH_MAX_TRIES); 8303 8304 auth_data->expected_transaction = 2; 8305 8306 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8307 trans = auth_data->sae_trans; 8308 status = auth_data->sae_status; 8309 auth_data->expected_transaction = trans; 8310 } 8311 8312 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8313 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8314 IEEE80211_TX_INTFL_MLME_CONN_TX; 8315 8316 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8317 auth_data->data, auth_data->data_len, 8318 auth_data->ap_addr, auth_data->ap_addr, 8319 NULL, 0, 0, tx_flags); 8320 8321 if (tx_flags == 0) { 8322 if (auth_data->algorithm == WLAN_AUTH_SAE) 8323 auth_data->timeout = jiffies + 8324 IEEE80211_AUTH_TIMEOUT_SAE; 8325 else 8326 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8327 } else { 8328 auth_data->timeout = 8329 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8330 } 8331 8332 auth_data->timeout_started = true; 8333 run_again(sdata, auth_data->timeout); 8334 8335 return 0; 8336 } 8337 8338 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8339 { 8340 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8341 struct ieee80211_local *local = sdata->local; 8342 int ret; 8343 8344 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8345 8346 assoc_data->tries++; 8347 assoc_data->comeback = false; 8348 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8349 sdata_info(sdata, "association with %pM timed out\n", 8350 assoc_data->ap_addr); 8351 8352 /* 8353 * Most likely AP is not in the range so remove the 8354 * bss struct for that AP. 8355 */ 8356 cfg80211_unlink_bss(local->hw.wiphy, 8357 assoc_data->link[assoc_data->assoc_link_id].bss); 8358 8359 return -ETIMEDOUT; 8360 } 8361 8362 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8363 assoc_data->ap_addr, assoc_data->tries, 8364 IEEE80211_ASSOC_MAX_TRIES); 8365 ret = ieee80211_send_assoc(sdata); 8366 if (ret) 8367 return ret; 8368 8369 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8370 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8371 assoc_data->timeout_started = true; 8372 run_again(sdata, assoc_data->timeout); 8373 } else { 8374 assoc_data->timeout = 8375 round_jiffies_up(jiffies + 8376 IEEE80211_ASSOC_TIMEOUT_LONG); 8377 assoc_data->timeout_started = true; 8378 run_again(sdata, assoc_data->timeout); 8379 } 8380 8381 return 0; 8382 } 8383 8384 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8385 __le16 fc, bool acked) 8386 { 8387 struct ieee80211_local *local = sdata->local; 8388 8389 sdata->u.mgd.status_fc = fc; 8390 sdata->u.mgd.status_acked = acked; 8391 sdata->u.mgd.status_received = true; 8392 8393 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8394 } 8395 8396 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8397 { 8398 struct ieee80211_local *local = sdata->local; 8399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8400 8401 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8402 8403 if (ifmgd->status_received) { 8404 __le16 fc = ifmgd->status_fc; 8405 bool status_acked = ifmgd->status_acked; 8406 8407 ifmgd->status_received = false; 8408 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8409 if (status_acked) { 8410 if (ifmgd->auth_data->algorithm == 8411 WLAN_AUTH_SAE) 8412 ifmgd->auth_data->timeout = 8413 jiffies + 8414 IEEE80211_AUTH_TIMEOUT_SAE; 8415 else 8416 ifmgd->auth_data->timeout = 8417 jiffies + 8418 IEEE80211_AUTH_TIMEOUT_SHORT; 8419 run_again(sdata, ifmgd->auth_data->timeout); 8420 } else { 8421 ifmgd->auth_data->timeout = jiffies - 1; 8422 } 8423 ifmgd->auth_data->timeout_started = true; 8424 } else if (ifmgd->assoc_data && 8425 !ifmgd->assoc_data->comeback && 8426 (ieee80211_is_assoc_req(fc) || 8427 ieee80211_is_reassoc_req(fc))) { 8428 /* 8429 * Update association timeout based on the TX status 8430 * for the (Re)Association Request frame. Skip this if 8431 * we have already processed a (Re)Association Response 8432 * frame that indicated need for association comeback 8433 * at a specific time in the future. This could happen 8434 * if the TX status information is delayed enough for 8435 * the response to be received and processed first. 8436 */ 8437 if (status_acked) { 8438 ifmgd->assoc_data->timeout = 8439 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8440 run_again(sdata, ifmgd->assoc_data->timeout); 8441 } else { 8442 ifmgd->assoc_data->timeout = jiffies - 1; 8443 } 8444 ifmgd->assoc_data->timeout_started = true; 8445 } 8446 } 8447 8448 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8449 time_after(jiffies, ifmgd->auth_data->timeout)) { 8450 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8451 /* 8452 * ok ... we waited for assoc or continuation but 8453 * userspace didn't do it, so kill the auth data 8454 */ 8455 ieee80211_destroy_auth_data(sdata, false); 8456 } else if (ieee80211_auth(sdata)) { 8457 u8 ap_addr[ETH_ALEN]; 8458 struct ieee80211_event event = { 8459 .type = MLME_EVENT, 8460 .u.mlme.data = AUTH_EVENT, 8461 .u.mlme.status = MLME_TIMEOUT, 8462 }; 8463 8464 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8465 8466 ieee80211_destroy_auth_data(sdata, false); 8467 8468 cfg80211_auth_timeout(sdata->dev, ap_addr); 8469 drv_event_callback(sdata->local, sdata, &event); 8470 } 8471 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8472 run_again(sdata, ifmgd->auth_data->timeout); 8473 8474 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8475 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8476 if ((ifmgd->assoc_data->need_beacon && 8477 !sdata->deflink.u.mgd.have_beacon) || 8478 ieee80211_do_assoc(sdata)) { 8479 struct ieee80211_event event = { 8480 .type = MLME_EVENT, 8481 .u.mlme.data = ASSOC_EVENT, 8482 .u.mlme.status = MLME_TIMEOUT, 8483 }; 8484 8485 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8486 drv_event_callback(sdata->local, sdata, &event); 8487 } 8488 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8489 run_again(sdata, ifmgd->assoc_data->timeout); 8490 8491 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8492 ifmgd->associated) { 8493 u8 *bssid = sdata->deflink.u.mgd.bssid; 8494 int max_tries; 8495 8496 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8497 max_tries = max_nullfunc_tries; 8498 else 8499 max_tries = max_probe_tries; 8500 8501 /* ACK received for nullfunc probing frame */ 8502 if (!ifmgd->probe_send_count) 8503 ieee80211_reset_ap_probe(sdata); 8504 else if (ifmgd->nullfunc_failed) { 8505 if (ifmgd->probe_send_count < max_tries) { 8506 mlme_dbg(sdata, 8507 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8508 bssid, ifmgd->probe_send_count, 8509 max_tries); 8510 ieee80211_mgd_probe_ap_send(sdata); 8511 } else { 8512 mlme_dbg(sdata, 8513 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8514 bssid); 8515 ieee80211_sta_connection_lost(sdata, 8516 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8517 false); 8518 } 8519 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8520 run_again(sdata, ifmgd->probe_timeout); 8521 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8522 mlme_dbg(sdata, 8523 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8524 bssid, probe_wait_ms); 8525 ieee80211_sta_connection_lost(sdata, 8526 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8527 } else if (ifmgd->probe_send_count < max_tries) { 8528 mlme_dbg(sdata, 8529 "No probe response from AP %pM after %dms, try %d/%i\n", 8530 bssid, probe_wait_ms, 8531 ifmgd->probe_send_count, max_tries); 8532 ieee80211_mgd_probe_ap_send(sdata); 8533 } else { 8534 /* 8535 * We actually lost the connection ... or did we? 8536 * Let's make sure! 8537 */ 8538 mlme_dbg(sdata, 8539 "No probe response from AP %pM after %dms, disconnecting.\n", 8540 bssid, probe_wait_ms); 8541 8542 ieee80211_sta_connection_lost(sdata, 8543 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8544 } 8545 } 8546 } 8547 8548 static bool 8549 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8550 { 8551 /* 8552 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8553 * the links. 8554 */ 8555 struct ieee80211_link_data *link; 8556 8557 guard(rcu)(); 8558 8559 for_each_link_data_rcu(sdata, link) { 8560 if (!(link->conf->csa_active && 8561 !link->u.mgd.csa.waiting_bcn)) 8562 return false; 8563 } 8564 8565 return true; 8566 } 8567 8568 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8569 { 8570 struct ieee80211_sub_if_data *sdata = 8571 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8572 8573 if (ieee80211_is_csa_in_progress(sdata)) 8574 return; 8575 8576 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8577 return; 8578 8579 sdata->u.mgd.connection_loss = false; 8580 wiphy_work_queue(sdata->local->hw.wiphy, 8581 &sdata->u.mgd.beacon_connection_loss_work); 8582 } 8583 8584 static unsigned long 8585 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8586 { 8587 unsigned long latest_timeout = jiffies; 8588 unsigned int link_id; 8589 struct sta_info *sta; 8590 8591 guard(rcu)(); 8592 8593 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8594 if (!sta) 8595 return 0; 8596 8597 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8598 link_id++) { 8599 struct link_sta_info *link_sta; 8600 unsigned long timeout; 8601 8602 link_sta = rcu_dereference(sta->link[link_id]); 8603 if (!link_sta) 8604 continue; 8605 8606 timeout = link_sta->status_stats.last_ack; 8607 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8608 timeout = link_sta->rx_stats.last_rx; 8609 8610 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8611 8612 /* 8613 * latest_timeout holds the timeout of the link 8614 * that will expire last among all links in an 8615 * non-AP MLD STA. This ensures that the connection 8616 * monitor timer is only reset if at least one link 8617 * is still active, and it is scheduled to fire at 8618 * the latest possible timeout. 8619 */ 8620 if (time_after(timeout, latest_timeout)) 8621 latest_timeout = timeout; 8622 } 8623 8624 return latest_timeout; 8625 } 8626 8627 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8628 { 8629 struct ieee80211_sub_if_data *sdata = 8630 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8631 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8632 struct ieee80211_local *local = sdata->local; 8633 unsigned long latest_timeout; 8634 8635 if (ieee80211_is_csa_in_progress(sdata)) 8636 return; 8637 8638 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8639 8640 /* 8641 * If latest timeout is after now, then update timer to fire at 8642 * the later date, but do not actually probe at this time. 8643 */ 8644 if (time_is_after_jiffies(latest_timeout)) { 8645 mod_timer(&ifmgd->conn_mon_timer, 8646 round_jiffies_up(latest_timeout)); 8647 return; 8648 } 8649 8650 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8651 } 8652 8653 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8654 struct wiphy_work *work) 8655 { 8656 struct ieee80211_sub_if_data *sdata = 8657 container_of(work, struct ieee80211_sub_if_data, 8658 u.mgd.monitor_work); 8659 8660 ieee80211_mgd_probe_ap(sdata, false); 8661 } 8662 8663 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8664 { 8665 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8666 __ieee80211_stop_poll(sdata); 8667 8668 /* let's probe the connection once */ 8669 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8670 wiphy_work_queue(sdata->local->hw.wiphy, 8671 &sdata->u.mgd.monitor_work); 8672 } 8673 } 8674 8675 #ifdef CONFIG_PM 8676 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8677 { 8678 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8679 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8680 8681 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8682 8683 if (ifmgd->auth_data || ifmgd->assoc_data) { 8684 const u8 *ap_addr = ifmgd->auth_data ? 8685 ifmgd->auth_data->ap_addr : 8686 ifmgd->assoc_data->ap_addr; 8687 8688 /* 8689 * If we are trying to authenticate / associate while suspending, 8690 * cfg80211 won't know and won't actually abort those attempts, 8691 * thus we need to do that ourselves. 8692 */ 8693 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8694 IEEE80211_STYPE_DEAUTH, 8695 WLAN_REASON_DEAUTH_LEAVING, 8696 false, frame_buf); 8697 if (ifmgd->assoc_data) 8698 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8699 if (ifmgd->auth_data) 8700 ieee80211_destroy_auth_data(sdata, false); 8701 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8702 IEEE80211_DEAUTH_FRAME_LEN, 8703 false); 8704 } 8705 8706 /* This is a bit of a hack - we should find a better and more generic 8707 * solution to this. Normally when suspending, cfg80211 will in fact 8708 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8709 * auth (not so important) or assoc (this is the problem) process. 8710 * 8711 * As a consequence, it can happen that we are in the process of both 8712 * associating and suspending, and receive an association response 8713 * after cfg80211 has checked if it needs to disconnect, but before 8714 * we actually set the flag to drop incoming frames. This will then 8715 * cause the workqueue flush to process the association response in 8716 * the suspend, resulting in a successful association just before it 8717 * tries to remove the interface from the driver, which now though 8718 * has a channel context assigned ... this results in issues. 8719 * 8720 * To work around this (for now) simply deauth here again if we're 8721 * now connected. 8722 */ 8723 if (ifmgd->associated && !sdata->local->wowlan) { 8724 u8 bssid[ETH_ALEN]; 8725 struct cfg80211_deauth_request req = { 8726 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8727 .bssid = bssid, 8728 }; 8729 8730 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8731 ieee80211_mgd_deauth(sdata, &req); 8732 } 8733 } 8734 #endif 8735 8736 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8737 { 8738 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8739 8740 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8741 8742 if (!ifmgd->associated) 8743 return; 8744 8745 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8746 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8747 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8748 ieee80211_sta_connection_lost(sdata, 8749 WLAN_REASON_UNSPECIFIED, 8750 true); 8751 return; 8752 } 8753 8754 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8755 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8756 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8757 ieee80211_sta_connection_lost(sdata, 8758 WLAN_REASON_UNSPECIFIED, 8759 true); 8760 return; 8761 } 8762 } 8763 8764 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8765 struct wiphy_work *work) 8766 { 8767 struct ieee80211_link_data *link = 8768 container_of(work, struct ieee80211_link_data, 8769 u.mgd.request_smps_work); 8770 8771 __ieee80211_request_smps_mgd(link->sdata, link, 8772 link->u.mgd.driver_smps_mode); 8773 } 8774 8775 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8776 struct wiphy_work *work) 8777 { 8778 struct ieee80211_sub_if_data *sdata = 8779 container_of(work, struct ieee80211_sub_if_data, 8780 u.mgd.reconf.wk.work); 8781 8782 if (!sdata->u.mgd.reconf.added_links && 8783 !sdata->u.mgd.reconf.removed_links) 8784 return; 8785 8786 sdata_info(sdata, 8787 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8788 sdata->u.mgd.reconf.added_links, 8789 sdata->u.mgd.reconf.removed_links); 8790 8791 __ieee80211_disconnect(sdata); 8792 } 8793 8794 /* interface setup */ 8795 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8796 { 8797 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8798 8799 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8800 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8801 ieee80211_beacon_connection_loss_work); 8802 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8803 ieee80211_csa_connection_drop_work); 8804 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8805 ieee80211_tdls_peer_del_work); 8806 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8807 ieee80211_ml_reconf_work); 8808 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8809 ieee80211_ml_sta_reconf_timeout); 8810 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8811 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8812 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8813 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8814 ieee80211_sta_handle_tspec_ac_params_wk); 8815 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8816 ieee80211_tid_to_link_map_work); 8817 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8818 ieee80211_neg_ttlm_timeout_work); 8819 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8820 ieee80211_teardown_ttlm_work); 8821 8822 ifmgd->flags = 0; 8823 ifmgd->powersave = sdata->wdev.ps; 8824 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8825 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8826 /* Setup TDLS data */ 8827 spin_lock_init(&ifmgd->teardown_lock); 8828 ifmgd->teardown_skb = NULL; 8829 ifmgd->orig_teardown_skb = NULL; 8830 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8831 } 8832 8833 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8834 struct wiphy_work *work) 8835 { 8836 struct ieee80211_link_data *link = 8837 container_of(work, struct ieee80211_link_data, 8838 u.mgd.recalc_smps); 8839 8840 ieee80211_recalc_smps(link->sdata, link); 8841 } 8842 8843 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8844 { 8845 struct ieee80211_sub_if_data *sdata = link->sdata; 8846 struct ieee80211_local *local = sdata->local; 8847 unsigned int link_id = link->link_id; 8848 8849 link->u.mgd.p2p_noa_index = -1; 8850 link->conf->bssid = link->u.mgd.bssid; 8851 link->smps_mode = IEEE80211_SMPS_OFF; 8852 8853 wiphy_work_init(&link->u.mgd.request_smps_work, 8854 ieee80211_request_smps_mgd_work); 8855 wiphy_work_init(&link->u.mgd.recalc_smps, 8856 ieee80211_recalc_smps_work); 8857 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8858 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8859 else 8860 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8861 8862 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8863 ieee80211_csa_switch_work); 8864 8865 ieee80211_clear_tpe(&link->conf->tpe); 8866 8867 if (sdata->u.mgd.assoc_data) 8868 ether_addr_copy(link->conf->addr, 8869 sdata->u.mgd.assoc_data->link[link_id].addr); 8870 else if (sdata->u.mgd.reconf.add_links_data) 8871 ether_addr_copy(link->conf->addr, 8872 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8873 else if (!is_valid_ether_addr(link->conf->addr)) 8874 eth_random_addr(link->conf->addr); 8875 } 8876 8877 /* scan finished notification */ 8878 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8879 { 8880 struct ieee80211_sub_if_data *sdata; 8881 8882 /* Restart STA timers */ 8883 rcu_read_lock(); 8884 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8885 if (ieee80211_sdata_running(sdata)) 8886 ieee80211_restart_sta_timer(sdata); 8887 } 8888 rcu_read_unlock(); 8889 } 8890 8891 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8892 struct cfg80211_bss *cbss, s8 link_id, 8893 const u8 *ap_mld_addr, bool assoc, 8894 struct ieee80211_conn_settings *conn, 8895 bool override, 8896 unsigned long *userspace_selectors) 8897 { 8898 struct ieee80211_local *local = sdata->local; 8899 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8900 struct ieee80211_bss *bss = (void *)cbss->priv; 8901 struct sta_info *new_sta = NULL; 8902 struct ieee80211_link_data *link; 8903 bool have_sta = false; 8904 bool mlo; 8905 int err; 8906 u16 new_links; 8907 8908 if (link_id >= 0) { 8909 mlo = true; 8910 if (WARN_ON(!ap_mld_addr)) 8911 return -EINVAL; 8912 new_links = BIT(link_id); 8913 } else { 8914 if (WARN_ON(ap_mld_addr)) 8915 return -EINVAL; 8916 ap_mld_addr = cbss->bssid; 8917 new_links = 0; 8918 link_id = 0; 8919 mlo = false; 8920 } 8921 8922 if (assoc) { 8923 rcu_read_lock(); 8924 have_sta = sta_info_get(sdata, ap_mld_addr); 8925 rcu_read_unlock(); 8926 } 8927 8928 if (mlo && !have_sta && 8929 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8930 return -EINVAL; 8931 8932 err = ieee80211_vif_set_links(sdata, new_links, 0); 8933 if (err) 8934 return err; 8935 8936 link = sdata_dereference(sdata->link[link_id], sdata); 8937 if (WARN_ON(!link)) { 8938 err = -ENOLINK; 8939 goto out_err; 8940 } 8941 8942 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8943 err = -EINVAL; 8944 goto out_err; 8945 } 8946 8947 /* If a reconfig is happening, bail out */ 8948 if (local->in_reconfig) { 8949 err = -EBUSY; 8950 goto out_err; 8951 } 8952 8953 if (!have_sta) { 8954 if (mlo) 8955 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8956 link_id, cbss->bssid, 8957 GFP_KERNEL); 8958 else 8959 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8960 8961 if (!new_sta) { 8962 err = -ENOMEM; 8963 goto out_err; 8964 } 8965 8966 new_sta->sta.mlo = mlo; 8967 } 8968 8969 /* 8970 * Set up the information for the new channel before setting the 8971 * new channel. We can't - completely race-free - change the basic 8972 * rates bitmap and the channel (sband) that it refers to, but if 8973 * we set it up before we at least avoid calling into the driver's 8974 * bss_info_changed() method with invalid information (since we do 8975 * call that from changing the channel - only for IDLE and perhaps 8976 * some others, but ...). 8977 * 8978 * So to avoid that, just set up all the new information before the 8979 * channel, but tell the driver to apply it only afterwards, since 8980 * it might need the new channel for that. 8981 */ 8982 if (new_sta) { 8983 const struct cfg80211_bss_ies *ies; 8984 struct link_sta_info *link_sta; 8985 8986 rcu_read_lock(); 8987 link_sta = rcu_dereference(new_sta->link[link_id]); 8988 if (WARN_ON(!link_sta)) { 8989 rcu_read_unlock(); 8990 sta_info_free(local, new_sta); 8991 err = -EINVAL; 8992 goto out_err; 8993 } 8994 8995 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8996 link_sta, cbss); 8997 if (err) { 8998 rcu_read_unlock(); 8999 sta_info_free(local, new_sta); 9000 goto out_err; 9001 } 9002 9003 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9004 9005 /* set timing information */ 9006 link->conf->beacon_int = cbss->beacon_interval; 9007 ies = rcu_dereference(cbss->beacon_ies); 9008 if (ies) { 9009 link->conf->sync_tsf = ies->tsf; 9010 link->conf->sync_device_ts = 9011 bss->device_ts_beacon; 9012 9013 ieee80211_get_dtim(ies, 9014 &link->conf->sync_dtim_count, 9015 NULL); 9016 } else if (!ieee80211_hw_check(&sdata->local->hw, 9017 TIMING_BEACON_ONLY)) { 9018 ies = rcu_dereference(cbss->proberesp_ies); 9019 /* must be non-NULL since beacon IEs were NULL */ 9020 link->conf->sync_tsf = ies->tsf; 9021 link->conf->sync_device_ts = 9022 bss->device_ts_presp; 9023 link->conf->sync_dtim_count = 0; 9024 } else { 9025 link->conf->sync_tsf = 0; 9026 link->conf->sync_device_ts = 0; 9027 link->conf->sync_dtim_count = 0; 9028 } 9029 rcu_read_unlock(); 9030 } 9031 9032 if (new_sta || override) { 9033 /* 9034 * Only set this if we're also going to calculate the AP 9035 * settings etc., otherwise this was set before in a 9036 * previous call. Note override is set to %true in assoc 9037 * if the settings were changed. 9038 */ 9039 link->u.mgd.conn = *conn; 9040 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9041 mlo, &link->u.mgd.conn, 9042 userspace_selectors); 9043 if (err) { 9044 if (new_sta) 9045 sta_info_free(local, new_sta); 9046 goto out_err; 9047 } 9048 /* pass out for use in assoc */ 9049 *conn = link->u.mgd.conn; 9050 } 9051 9052 if (new_sta) { 9053 /* 9054 * tell driver about BSSID, basic rates and timing 9055 * this was set up above, before setting the channel 9056 */ 9057 ieee80211_link_info_change_notify(sdata, link, 9058 BSS_CHANGED_BSSID | 9059 BSS_CHANGED_BASIC_RATES | 9060 BSS_CHANGED_BEACON_INT); 9061 9062 if (assoc) 9063 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9064 9065 err = sta_info_insert(new_sta); 9066 new_sta = NULL; 9067 if (err) { 9068 sdata_info(sdata, 9069 "failed to insert STA entry for the AP (error %d)\n", 9070 err); 9071 goto out_release_chan; 9072 } 9073 } else 9074 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9075 9076 /* Cancel scan to ensure that nothing interferes with connection */ 9077 if (local->scanning) 9078 ieee80211_scan_cancel(local); 9079 9080 return 0; 9081 9082 out_release_chan: 9083 ieee80211_link_release_channel(link); 9084 out_err: 9085 ieee80211_vif_set_links(sdata, 0, 0); 9086 return err; 9087 } 9088 9089 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9090 const struct cfg80211_bss_ies *ies, 9091 u8 cur_channel, bool ignore_ecsa) 9092 { 9093 const struct element *csa_elem, *ecsa_elem; 9094 struct ieee80211_channel_sw_ie *csa = NULL; 9095 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9096 9097 if (!ies) 9098 return false; 9099 9100 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9101 ies->data, ies->len); 9102 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9103 csa = (void *)csa_elem->data; 9104 9105 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9106 ies->data, ies->len); 9107 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9108 ecsa = (void *)ecsa_elem->data; 9109 9110 if (csa && csa->count == 0) 9111 csa = NULL; 9112 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9113 csa = NULL; 9114 9115 if (ecsa && ecsa->count == 0) 9116 ecsa = NULL; 9117 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9118 ecsa = NULL; 9119 9120 if (ignore_ecsa && ecsa) { 9121 sdata_info(sdata, 9122 "Ignoring ECSA in probe response - was considered stuck!\n"); 9123 return csa; 9124 } 9125 9126 return csa || ecsa; 9127 } 9128 9129 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9130 struct cfg80211_bss *bss) 9131 { 9132 u8 cur_channel; 9133 bool ret; 9134 9135 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9136 9137 rcu_read_lock(); 9138 if (ieee80211_mgd_csa_present(sdata, 9139 rcu_dereference(bss->beacon_ies), 9140 cur_channel, false)) { 9141 ret = true; 9142 goto out; 9143 } 9144 9145 if (ieee80211_mgd_csa_present(sdata, 9146 rcu_dereference(bss->proberesp_ies), 9147 cur_channel, bss->proberesp_ecsa_stuck)) { 9148 ret = true; 9149 goto out; 9150 } 9151 9152 ret = false; 9153 out: 9154 rcu_read_unlock(); 9155 return ret; 9156 } 9157 9158 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9159 const u8 *supported_selectors, 9160 u8 supported_selectors_len) 9161 { 9162 if (supported_selectors) { 9163 for (int i = 0; i < supported_selectors_len; i++) { 9164 set_bit(supported_selectors[i], 9165 userspace_selectors); 9166 } 9167 } else { 9168 /* Assume SAE_H2E support for backward compatibility. */ 9169 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9170 userspace_selectors); 9171 } 9172 } 9173 9174 /* config hooks */ 9175 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9176 struct cfg80211_auth_request *req) 9177 { 9178 struct ieee80211_local *local = sdata->local; 9179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9180 struct ieee80211_mgd_auth_data *auth_data; 9181 struct ieee80211_conn_settings conn; 9182 struct ieee80211_link_data *link; 9183 struct ieee80211_supported_band *sband; 9184 struct ieee80211_bss *bss; 9185 u16 auth_alg; 9186 int err; 9187 bool cont_auth, wmm_used; 9188 9189 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9190 9191 /* prepare auth data structure */ 9192 9193 switch (req->auth_type) { 9194 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9195 auth_alg = WLAN_AUTH_OPEN; 9196 break; 9197 case NL80211_AUTHTYPE_SHARED_KEY: 9198 if (fips_enabled) 9199 return -EOPNOTSUPP; 9200 auth_alg = WLAN_AUTH_SHARED_KEY; 9201 break; 9202 case NL80211_AUTHTYPE_FT: 9203 auth_alg = WLAN_AUTH_FT; 9204 break; 9205 case NL80211_AUTHTYPE_NETWORK_EAP: 9206 auth_alg = WLAN_AUTH_LEAP; 9207 break; 9208 case NL80211_AUTHTYPE_SAE: 9209 auth_alg = WLAN_AUTH_SAE; 9210 break; 9211 case NL80211_AUTHTYPE_FILS_SK: 9212 auth_alg = WLAN_AUTH_FILS_SK; 9213 break; 9214 case NL80211_AUTHTYPE_FILS_SK_PFS: 9215 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9216 break; 9217 case NL80211_AUTHTYPE_FILS_PK: 9218 auth_alg = WLAN_AUTH_FILS_PK; 9219 break; 9220 default: 9221 return -EOPNOTSUPP; 9222 } 9223 9224 if (ifmgd->assoc_data) 9225 return -EBUSY; 9226 9227 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9228 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9229 return -EINVAL; 9230 } 9231 9232 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9233 req->ie_len, GFP_KERNEL); 9234 if (!auth_data) 9235 return -ENOMEM; 9236 9237 memcpy(auth_data->ap_addr, 9238 req->ap_mld_addr ?: req->bss->bssid, 9239 ETH_ALEN); 9240 auth_data->bss = req->bss; 9241 auth_data->link_id = req->link_id; 9242 9243 if (req->auth_data_len >= 4) { 9244 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9245 __le16 *pos = (__le16 *) req->auth_data; 9246 9247 auth_data->sae_trans = le16_to_cpu(pos[0]); 9248 auth_data->sae_status = le16_to_cpu(pos[1]); 9249 } 9250 memcpy(auth_data->data, req->auth_data + 4, 9251 req->auth_data_len - 4); 9252 auth_data->data_len += req->auth_data_len - 4; 9253 } 9254 9255 /* Check if continuing authentication or trying to authenticate with the 9256 * same BSS that we were in the process of authenticating with and avoid 9257 * removal and re-addition of the STA entry in 9258 * ieee80211_prep_connection(). 9259 */ 9260 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9261 ifmgd->auth_data->link_id == req->link_id; 9262 9263 if (req->ie && req->ie_len) { 9264 memcpy(&auth_data->data[auth_data->data_len], 9265 req->ie, req->ie_len); 9266 auth_data->data_len += req->ie_len; 9267 } 9268 9269 if (req->key && req->key_len) { 9270 auth_data->key_len = req->key_len; 9271 auth_data->key_idx = req->key_idx; 9272 memcpy(auth_data->key, req->key, req->key_len); 9273 } 9274 9275 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9276 req->supported_selectors, 9277 req->supported_selectors_len); 9278 9279 auth_data->algorithm = auth_alg; 9280 9281 /* try to authenticate/probe */ 9282 9283 if (ifmgd->auth_data) { 9284 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9285 auth_data->peer_confirmed = 9286 ifmgd->auth_data->peer_confirmed; 9287 } 9288 ieee80211_destroy_auth_data(sdata, cont_auth); 9289 } 9290 9291 /* prep auth_data so we don't go into idle on disassoc */ 9292 ifmgd->auth_data = auth_data; 9293 9294 /* If this is continuation of an ongoing SAE authentication exchange 9295 * (i.e., request to send SAE Confirm) and the peer has already 9296 * confirmed, mark authentication completed since we are about to send 9297 * out SAE Confirm. 9298 */ 9299 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9300 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9301 ieee80211_mark_sta_auth(sdata); 9302 9303 if (ifmgd->associated) { 9304 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9305 9306 sdata_info(sdata, 9307 "disconnect from AP %pM for new auth to %pM\n", 9308 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9309 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9310 WLAN_REASON_UNSPECIFIED, 9311 false, frame_buf); 9312 9313 ieee80211_report_disconnect(sdata, frame_buf, 9314 sizeof(frame_buf), true, 9315 WLAN_REASON_UNSPECIFIED, 9316 false); 9317 } 9318 9319 /* needed for transmitting the auth frame(s) properly */ 9320 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9321 9322 bss = (void *)req->bss->priv; 9323 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9324 9325 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9326 9327 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9328 &conn); 9329 9330 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9331 req->ap_mld_addr, cont_auth, 9332 &conn, false, 9333 auth_data->userspace_selectors); 9334 if (err) 9335 goto err_clear; 9336 9337 if (req->link_id >= 0) 9338 link = sdata_dereference(sdata->link[req->link_id], sdata); 9339 else 9340 link = &sdata->deflink; 9341 9342 if (WARN_ON(!link)) { 9343 err = -ENOLINK; 9344 goto err_clear; 9345 } 9346 9347 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9348 auth_data->ap_addr, link->conf->addr); 9349 9350 err = ieee80211_auth(sdata); 9351 if (err) { 9352 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9353 goto err_clear; 9354 } 9355 9356 /* hold our own reference */ 9357 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9358 return 0; 9359 9360 err_clear: 9361 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9362 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9363 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9364 BSS_CHANGED_BSSID); 9365 ieee80211_link_release_channel(&sdata->deflink); 9366 } 9367 ifmgd->auth_data = NULL; 9368 kfree(auth_data); 9369 return err; 9370 } 9371 9372 static void 9373 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9374 struct ieee80211_mgd_assoc_data *assoc_data, 9375 struct cfg80211_assoc_request *req, 9376 struct ieee80211_conn_settings *conn, 9377 unsigned int link_id) 9378 { 9379 struct ieee80211_local *local = sdata->local; 9380 const struct cfg80211_bss_ies *bss_ies; 9381 struct ieee80211_supported_band *sband; 9382 struct ieee80211_link_data *link; 9383 struct cfg80211_bss *cbss; 9384 struct ieee80211_bss *bss; 9385 9386 cbss = assoc_data->link[link_id].bss; 9387 if (WARN_ON(!cbss)) 9388 return; 9389 9390 bss = (void *)cbss->priv; 9391 9392 sband = local->hw.wiphy->bands[cbss->channel->band]; 9393 if (WARN_ON(!sband)) 9394 return; 9395 9396 link = sdata_dereference(sdata->link[link_id], sdata); 9397 if (WARN_ON(!link)) 9398 return; 9399 9400 /* for MLO connections assume advertising all rates is OK */ 9401 if (!req->ap_mld_addr) { 9402 assoc_data->supp_rates = bss->supp_rates; 9403 assoc_data->supp_rates_len = bss->supp_rates_len; 9404 } 9405 9406 /* copy and link elems for the STA profile */ 9407 if (req->links[link_id].elems_len) { 9408 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9409 req->links[link_id].elems_len); 9410 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9411 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9412 assoc_data->ie_pos += req->links[link_id].elems_len; 9413 } 9414 9415 link->u.mgd.beacon_crc_valid = false; 9416 link->u.mgd.dtim_period = 0; 9417 link->u.mgd.have_beacon = false; 9418 9419 /* override HT configuration only if the AP and we support it */ 9420 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9421 struct ieee80211_sta_ht_cap sta_ht_cap; 9422 9423 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9424 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9425 } 9426 9427 rcu_read_lock(); 9428 bss_ies = rcu_dereference(cbss->beacon_ies); 9429 if (bss_ies) { 9430 u8 dtim_count = 0; 9431 9432 ieee80211_get_dtim(bss_ies, &dtim_count, 9433 &link->u.mgd.dtim_period); 9434 9435 sdata->deflink.u.mgd.have_beacon = true; 9436 9437 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9438 link->conf->sync_tsf = bss_ies->tsf; 9439 link->conf->sync_device_ts = bss->device_ts_beacon; 9440 link->conf->sync_dtim_count = dtim_count; 9441 } 9442 } else { 9443 bss_ies = rcu_dereference(cbss->ies); 9444 } 9445 9446 if (bss_ies) { 9447 const struct element *elem; 9448 9449 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9450 bss_ies->data, bss_ies->len); 9451 if (elem && elem->datalen >= 3) 9452 link->conf->profile_periodicity = elem->data[2]; 9453 else 9454 link->conf->profile_periodicity = 0; 9455 9456 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9457 bss_ies->data, bss_ies->len); 9458 if (elem && elem->datalen >= 11 && 9459 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9460 link->conf->ema_ap = true; 9461 else 9462 link->conf->ema_ap = false; 9463 } 9464 rcu_read_unlock(); 9465 9466 if (bss->corrupt_data) { 9467 char *corrupt_type = "data"; 9468 9469 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9470 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9471 corrupt_type = "beacon and probe response"; 9472 else 9473 corrupt_type = "beacon"; 9474 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9475 corrupt_type = "probe response"; 9476 } 9477 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9478 cbss->bssid, corrupt_type); 9479 } 9480 9481 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9482 if (sdata->u.mgd.powersave) 9483 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9484 else 9485 link->smps_mode = IEEE80211_SMPS_OFF; 9486 } else { 9487 link->smps_mode = link->u.mgd.req_smps; 9488 } 9489 } 9490 9491 static int 9492 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9493 struct ieee80211_mgd_assoc_data *assoc_data, 9494 int link_id) 9495 { 9496 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9497 enum nl80211_band band = cbss->channel->band; 9498 struct ieee80211_supported_band *sband; 9499 const struct element *elem; 9500 int err; 9501 9502 /* neither HT nor VHT elements used on 6 GHz */ 9503 if (band == NL80211_BAND_6GHZ) 9504 return 0; 9505 9506 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9507 return 0; 9508 9509 rcu_read_lock(); 9510 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9511 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9512 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9513 cbss->bssid); 9514 err = -EINVAL; 9515 goto out_rcu; 9516 } 9517 assoc_data->link[link_id].ap_ht_param = 9518 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9519 rcu_read_unlock(); 9520 9521 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9522 return 0; 9523 9524 /* some drivers want to support VHT on 2.4 GHz even */ 9525 sband = sdata->local->hw.wiphy->bands[band]; 9526 if (!sband->vht_cap.vht_supported) 9527 return 0; 9528 9529 rcu_read_lock(); 9530 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9531 /* but even then accept it not being present on the AP */ 9532 if (!elem && band == NL80211_BAND_2GHZ) { 9533 err = 0; 9534 goto out_rcu; 9535 } 9536 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9537 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9538 cbss->bssid); 9539 err = -EINVAL; 9540 goto out_rcu; 9541 } 9542 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9543 sizeof(struct ieee80211_vht_cap)); 9544 rcu_read_unlock(); 9545 9546 return 0; 9547 out_rcu: 9548 rcu_read_unlock(); 9549 return err; 9550 } 9551 9552 static bool 9553 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9554 { 9555 const struct cfg80211_bss_ies *ies; 9556 struct cfg80211_bss *bss; 9557 const struct element *ml; 9558 9559 /* not an MLO connection if link_id < 0, so irrelevant */ 9560 if (req->link_id < 0) 9561 return false; 9562 9563 bss = req->links[req->link_id].bss; 9564 9565 guard(rcu)(); 9566 ies = rcu_dereference(bss->ies); 9567 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9568 ies->data, ies->len) { 9569 const struct ieee80211_multi_link_elem *mle; 9570 9571 if (!ieee80211_mle_type_ok(ml->data + 1, 9572 IEEE80211_ML_CONTROL_TYPE_BASIC, 9573 ml->datalen - 1)) 9574 continue; 9575 9576 mle = (void *)(ml->data + 1); 9577 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9578 return true; 9579 } 9580 9581 return false; 9582 9583 } 9584 9585 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9586 struct cfg80211_assoc_request *req) 9587 { 9588 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9589 struct ieee80211_local *local = sdata->local; 9590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9591 struct ieee80211_mgd_assoc_data *assoc_data; 9592 const struct element *ssid_elem; 9593 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9594 struct ieee80211_link_data *link; 9595 struct cfg80211_bss *cbss; 9596 bool override, uapsd_supported; 9597 bool match_auth; 9598 int i, err; 9599 size_t size = sizeof(*assoc_data) + req->ie_len; 9600 9601 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9602 size += req->links[i].elems_len; 9603 9604 /* FIXME: no support for 4-addr MLO yet */ 9605 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9606 return -EOPNOTSUPP; 9607 9608 assoc_data = kzalloc(size, GFP_KERNEL); 9609 if (!assoc_data) 9610 return -ENOMEM; 9611 9612 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9613 9614 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9615 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9616 err = -EINVAL; 9617 goto err_free; 9618 } 9619 9620 rcu_read_lock(); 9621 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9622 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9623 rcu_read_unlock(); 9624 err = -EINVAL; 9625 goto err_free; 9626 } 9627 9628 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9629 assoc_data->ssid_len = ssid_elem->datalen; 9630 rcu_read_unlock(); 9631 9632 if (req->ap_mld_addr) 9633 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9634 else 9635 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9636 9637 /* 9638 * Many APs have broken parsing of the extended MLD capa/ops field, 9639 * dropping (re-)association request frames or replying with association 9640 * response with a failure status if it's present. 9641 * Set our value from the userspace request only in strict mode or if 9642 * the AP also had that field present. 9643 */ 9644 if (ieee80211_hw_check(&local->hw, STRICT) || 9645 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9646 assoc_data->ext_mld_capa_ops = 9647 cpu_to_le16(req->ext_mld_capa_ops); 9648 9649 if (ifmgd->associated) { 9650 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9651 9652 sdata_info(sdata, 9653 "disconnect from AP %pM for new assoc to %pM\n", 9654 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9655 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9656 WLAN_REASON_UNSPECIFIED, 9657 false, frame_buf); 9658 9659 ieee80211_report_disconnect(sdata, frame_buf, 9660 sizeof(frame_buf), true, 9661 WLAN_REASON_UNSPECIFIED, 9662 false); 9663 } 9664 9665 memset(sdata->u.mgd.userspace_selectors, 0, 9666 sizeof(sdata->u.mgd.userspace_selectors)); 9667 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9668 req->supported_selectors, 9669 req->supported_selectors_len); 9670 9671 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9672 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9673 sizeof(ifmgd->ht_capa_mask)); 9674 9675 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9676 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9677 sizeof(ifmgd->vht_capa_mask)); 9678 9679 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9680 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9681 sizeof(ifmgd->s1g_capa_mask)); 9682 9683 /* keep some setup (AP STA, channel, ...) if matching */ 9684 match_auth = ifmgd->auth_data && 9685 ether_addr_equal(ifmgd->auth_data->ap_addr, 9686 assoc_data->ap_addr) && 9687 ifmgd->auth_data->link_id == req->link_id; 9688 9689 if (req->ap_mld_addr) { 9690 uapsd_supported = true; 9691 9692 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9693 ASSOC_REQ_DISABLE_VHT | 9694 ASSOC_REQ_DISABLE_HE | 9695 ASSOC_REQ_DISABLE_EHT)) { 9696 err = -EINVAL; 9697 goto err_free; 9698 } 9699 9700 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9701 struct ieee80211_supported_band *sband; 9702 struct cfg80211_bss *link_cbss = req->links[i].bss; 9703 struct ieee80211_bss *bss; 9704 9705 if (!link_cbss) 9706 continue; 9707 9708 bss = (void *)link_cbss->priv; 9709 9710 if (!bss->wmm_used) { 9711 err = -EINVAL; 9712 req->links[i].error = err; 9713 goto err_free; 9714 } 9715 9716 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9717 err = -EINVAL; 9718 req->links[i].error = err; 9719 goto err_free; 9720 } 9721 9722 link = sdata_dereference(sdata->link[i], sdata); 9723 if (link) 9724 ether_addr_copy(assoc_data->link[i].addr, 9725 link->conf->addr); 9726 else 9727 eth_random_addr(assoc_data->link[i].addr); 9728 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9729 9730 if (match_auth && i == assoc_link_id && link) 9731 assoc_data->link[i].conn = link->u.mgd.conn; 9732 else 9733 assoc_data->link[i].conn = 9734 ieee80211_conn_settings_unlimited; 9735 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9736 req, true, i, 9737 &assoc_data->link[i].conn); 9738 assoc_data->link[i].bss = link_cbss; 9739 assoc_data->link[i].disabled = req->links[i].disabled; 9740 9741 if (!bss->uapsd_supported) 9742 uapsd_supported = false; 9743 9744 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9745 err = -EINVAL; 9746 req->links[i].error = err; 9747 goto err_free; 9748 } 9749 9750 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9751 assoc_data, i); 9752 if (err) { 9753 err = -EINVAL; 9754 req->links[i].error = err; 9755 goto err_free; 9756 } 9757 } 9758 9759 assoc_data->wmm = true; 9760 } else { 9761 struct ieee80211_supported_band *sband; 9762 struct ieee80211_bss *bss = (void *)cbss->priv; 9763 9764 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9765 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9766 9767 assoc_data->wmm = bss->wmm_used && 9768 (local->hw.queues >= IEEE80211_NUM_ACS); 9769 9770 if (cbss->channel->band == NL80211_BAND_6GHZ && 9771 req->flags & (ASSOC_REQ_DISABLE_HT | 9772 ASSOC_REQ_DISABLE_VHT | 9773 ASSOC_REQ_DISABLE_HE)) { 9774 err = -EINVAL; 9775 goto err_free; 9776 } 9777 9778 sband = local->hw.wiphy->bands[cbss->channel->band]; 9779 9780 assoc_data->link[0].bss = cbss; 9781 9782 if (match_auth) 9783 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9784 else 9785 assoc_data->link[0].conn = 9786 ieee80211_conn_settings_unlimited; 9787 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9788 assoc_data->wmm, 0, 9789 &assoc_data->link[0].conn); 9790 9791 uapsd_supported = bss->uapsd_supported; 9792 9793 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9794 if (err) 9795 goto err_free; 9796 } 9797 9798 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9799 9800 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9801 err = -EBUSY; 9802 goto err_free; 9803 } 9804 9805 if (ifmgd->assoc_data) { 9806 err = -EBUSY; 9807 goto err_free; 9808 } 9809 9810 /* Cleanup is delayed if auth_data matches */ 9811 if (ifmgd->auth_data && !match_auth) 9812 ieee80211_destroy_auth_data(sdata, false); 9813 9814 if (req->ie && req->ie_len) { 9815 memcpy(assoc_data->ie, req->ie, req->ie_len); 9816 assoc_data->ie_len = req->ie_len; 9817 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9818 } else { 9819 assoc_data->ie_pos = assoc_data->ie; 9820 } 9821 9822 if (req->fils_kek) { 9823 /* should already be checked in cfg80211 - so warn */ 9824 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9825 err = -EINVAL; 9826 goto err_free; 9827 } 9828 memcpy(assoc_data->fils_kek, req->fils_kek, 9829 req->fils_kek_len); 9830 assoc_data->fils_kek_len = req->fils_kek_len; 9831 } 9832 9833 if (req->fils_nonces) 9834 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9835 2 * FILS_NONCE_LEN); 9836 9837 /* default timeout */ 9838 assoc_data->timeout = jiffies; 9839 assoc_data->timeout_started = true; 9840 9841 assoc_data->assoc_link_id = assoc_link_id; 9842 9843 if (req->ap_mld_addr) { 9844 /* if there was no authentication, set up the link */ 9845 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9846 if (err) 9847 goto err_clear; 9848 } 9849 9850 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9851 if (WARN_ON(!link)) { 9852 err = -EINVAL; 9853 goto err_clear; 9854 } 9855 9856 override = link->u.mgd.conn.mode != 9857 assoc_data->link[assoc_link_id].conn.mode || 9858 link->u.mgd.conn.bw_limit != 9859 assoc_data->link[assoc_link_id].conn.bw_limit; 9860 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9861 9862 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9863 assoc_link_id); 9864 9865 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9866 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9867 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9868 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9869 9870 if (assoc_data->wmm && uapsd_supported && 9871 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9872 assoc_data->uapsd = true; 9873 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9874 } else { 9875 assoc_data->uapsd = false; 9876 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9877 } 9878 9879 if (req->prev_bssid) 9880 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9881 9882 if (req->use_mfp) { 9883 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9884 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9885 } else { 9886 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9887 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9888 } 9889 9890 if (req->flags & ASSOC_REQ_USE_RRM) 9891 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9892 else 9893 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9894 9895 if (req->crypto.control_port) 9896 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9897 else 9898 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9899 9900 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9901 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9902 sdata->control_port_over_nl80211 = 9903 req->crypto.control_port_over_nl80211; 9904 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9905 9906 /* kick off associate process */ 9907 ifmgd->assoc_data = assoc_data; 9908 9909 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9910 if (!assoc_data->link[i].bss) 9911 continue; 9912 if (i == assoc_data->assoc_link_id) 9913 continue; 9914 /* only calculate the mode, hence link == NULL */ 9915 err = ieee80211_prep_channel(sdata, NULL, i, 9916 assoc_data->link[i].bss, true, 9917 &assoc_data->link[i].conn, 9918 sdata->u.mgd.userspace_selectors); 9919 if (err) { 9920 req->links[i].error = err; 9921 goto err_clear; 9922 } 9923 } 9924 9925 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9926 vif_cfg->ssid_len = assoc_data->ssid_len; 9927 9928 /* needed for transmitting the assoc frames properly */ 9929 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9930 9931 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9932 req->ap_mld_addr, true, 9933 &assoc_data->link[assoc_link_id].conn, 9934 override, 9935 sdata->u.mgd.userspace_selectors); 9936 if (err) 9937 goto err_clear; 9938 9939 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9940 const struct cfg80211_bss_ies *beacon_ies; 9941 9942 rcu_read_lock(); 9943 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9944 if (!beacon_ies) { 9945 /* 9946 * Wait up to one beacon interval ... 9947 * should this be more if we miss one? 9948 */ 9949 sdata_info(sdata, "waiting for beacon from %pM\n", 9950 link->u.mgd.bssid); 9951 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9952 assoc_data->timeout_started = true; 9953 assoc_data->need_beacon = true; 9954 } 9955 rcu_read_unlock(); 9956 } 9957 9958 run_again(sdata, assoc_data->timeout); 9959 9960 /* We are associating, clean up auth_data */ 9961 if (ifmgd->auth_data) 9962 ieee80211_destroy_auth_data(sdata, true); 9963 9964 return 0; 9965 err_clear: 9966 if (!ifmgd->auth_data) { 9967 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9968 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9969 BSS_CHANGED_BSSID); 9970 } 9971 ifmgd->assoc_data = NULL; 9972 err_free: 9973 kfree(assoc_data); 9974 return err; 9975 } 9976 9977 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9978 struct cfg80211_deauth_request *req) 9979 { 9980 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9981 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9982 bool tx = !req->local_state_change; 9983 struct ieee80211_prep_tx_info info = { 9984 .subtype = IEEE80211_STYPE_DEAUTH, 9985 }; 9986 9987 if (ifmgd->auth_data && 9988 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9989 sdata_info(sdata, 9990 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9991 req->bssid, req->reason_code, 9992 ieee80211_get_reason_code_string(req->reason_code)); 9993 9994 info.link_id = ifmgd->auth_data->link_id; 9995 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9996 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9997 IEEE80211_STYPE_DEAUTH, 9998 req->reason_code, tx, 9999 frame_buf); 10000 ieee80211_destroy_auth_data(sdata, false); 10001 ieee80211_report_disconnect(sdata, frame_buf, 10002 sizeof(frame_buf), true, 10003 req->reason_code, false); 10004 drv_mgd_complete_tx(sdata->local, sdata, &info); 10005 return 0; 10006 } 10007 10008 if (ifmgd->assoc_data && 10009 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10010 sdata_info(sdata, 10011 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10012 req->bssid, req->reason_code, 10013 ieee80211_get_reason_code_string(req->reason_code)); 10014 10015 info.link_id = ifmgd->assoc_data->assoc_link_id; 10016 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10017 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10018 IEEE80211_STYPE_DEAUTH, 10019 req->reason_code, tx, 10020 frame_buf); 10021 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10022 ieee80211_report_disconnect(sdata, frame_buf, 10023 sizeof(frame_buf), true, 10024 req->reason_code, false); 10025 drv_mgd_complete_tx(sdata->local, sdata, &info); 10026 return 0; 10027 } 10028 10029 if (ifmgd->associated && 10030 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10031 sdata_info(sdata, 10032 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10033 req->bssid, req->reason_code, 10034 ieee80211_get_reason_code_string(req->reason_code)); 10035 10036 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10037 req->reason_code, tx, frame_buf); 10038 ieee80211_report_disconnect(sdata, frame_buf, 10039 sizeof(frame_buf), true, 10040 req->reason_code, false); 10041 return 0; 10042 } 10043 10044 return -ENOTCONN; 10045 } 10046 10047 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10048 struct cfg80211_disassoc_request *req) 10049 { 10050 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10051 10052 if (!sdata->u.mgd.associated || 10053 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10054 return -ENOTCONN; 10055 10056 sdata_info(sdata, 10057 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10058 req->ap_addr, req->reason_code, 10059 ieee80211_get_reason_code_string(req->reason_code)); 10060 10061 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10062 req->reason_code, !req->local_state_change, 10063 frame_buf); 10064 10065 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10066 req->reason_code, false); 10067 10068 return 0; 10069 } 10070 10071 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10072 { 10073 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10074 &link->u.mgd.request_smps_work); 10075 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10076 &link->u.mgd.recalc_smps); 10077 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 10078 &link->u.mgd.csa.switch_work); 10079 } 10080 10081 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10082 { 10083 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10084 10085 /* 10086 * Make sure some work items will not run after this, 10087 * they will not do anything but might not have been 10088 * cancelled when disconnecting. 10089 */ 10090 wiphy_work_cancel(sdata->local->hw.wiphy, 10091 &ifmgd->monitor_work); 10092 wiphy_work_cancel(sdata->local->hw.wiphy, 10093 &ifmgd->beacon_connection_loss_work); 10094 wiphy_work_cancel(sdata->local->hw.wiphy, 10095 &ifmgd->csa_connection_drop_work); 10096 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10097 &ifmgd->tdls_peer_del_work); 10098 10099 if (ifmgd->assoc_data) 10100 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10101 if (ifmgd->auth_data) 10102 ieee80211_destroy_auth_data(sdata, false); 10103 spin_lock_bh(&ifmgd->teardown_lock); 10104 if (ifmgd->teardown_skb) { 10105 kfree_skb(ifmgd->teardown_skb); 10106 ifmgd->teardown_skb = NULL; 10107 ifmgd->orig_teardown_skb = NULL; 10108 } 10109 kfree(ifmgd->assoc_req_ies); 10110 ifmgd->assoc_req_ies = NULL; 10111 ifmgd->assoc_req_ies_len = 0; 10112 spin_unlock_bh(&ifmgd->teardown_lock); 10113 timer_delete_sync(&ifmgd->timer); 10114 } 10115 10116 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10117 enum nl80211_cqm_rssi_threshold_event rssi_event, 10118 s32 rssi_level, 10119 gfp_t gfp) 10120 { 10121 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10122 10123 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10124 10125 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10126 } 10127 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10128 10129 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10130 { 10131 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10132 10133 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10134 10135 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10136 } 10137 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10138 10139 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10140 int rssi_min_thold, 10141 int rssi_max_thold) 10142 { 10143 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10144 10145 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10146 return; 10147 10148 /* 10149 * Scale up threshold values before storing it, as the RSSI averaging 10150 * algorithm uses a scaled up value as well. Change this scaling 10151 * factor if the RSSI averaging algorithm changes. 10152 */ 10153 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10154 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10155 } 10156 10157 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10158 int rssi_min_thold, 10159 int rssi_max_thold) 10160 { 10161 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10162 10163 WARN_ON(rssi_min_thold == rssi_max_thold || 10164 rssi_min_thold > rssi_max_thold); 10165 10166 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10167 rssi_max_thold); 10168 } 10169 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10170 10171 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10172 { 10173 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10174 10175 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10176 } 10177 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10178 10179 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10180 struct ieee80211_mgmt *mgmt, size_t len) 10181 { 10182 struct ieee80211_local *local = sdata->local; 10183 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10184 struct ieee80211_mgd_assoc_data *add_links_data = 10185 ifmgd->reconf.add_links_data; 10186 struct sta_info *sta; 10187 struct cfg80211_mlo_reconf_done_data done_data = {}; 10188 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10189 sdata->u.mgd.reconf.removed_links; 10190 u16 link_mask, valid_links; 10191 unsigned int link_id; 10192 size_t orig_len = len; 10193 u8 i, group_key_data_len; 10194 u8 *pos; 10195 10196 if (!ieee80211_vif_is_mld(&sdata->vif) || 10197 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10198 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10199 sdata->u.mgd.reconf.dialog_token || 10200 !sta_changed_links) 10201 return; 10202 10203 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10204 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10205 10206 /* each status duple is 3 octets */ 10207 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10208 sdata_info(sdata, 10209 "mlo: reconf: unexpected len=%zu, count=%u\n", 10210 len, mgmt->u.action.u.ml_reconf_resp.count); 10211 goto disconnect; 10212 } 10213 10214 link_mask = sta_changed_links; 10215 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10216 u16 status = get_unaligned_le16(pos + 1); 10217 10218 link_id = *pos; 10219 10220 if (!(link_mask & BIT(link_id))) { 10221 sdata_info(sdata, 10222 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10223 link_id, sta_changed_links); 10224 goto disconnect; 10225 } 10226 10227 /* clear the corresponding link, to detect the case that 10228 * the same link was included more than one time 10229 */ 10230 link_mask &= ~BIT(link_id); 10231 10232 /* Handle failure to remove links here. Failure to remove added 10233 * links will be done later in the flow. 10234 */ 10235 if (status != WLAN_STATUS_SUCCESS) { 10236 sdata_info(sdata, 10237 "mlo: reconf: failed on link=%u, status=%u\n", 10238 link_id, status); 10239 10240 /* The AP MLD failed to remove a link that was already 10241 * removed locally. As this is not expected behavior, 10242 * disconnect 10243 */ 10244 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10245 goto disconnect; 10246 10247 /* The AP MLD failed to add a link. Remove it from the 10248 * added links. 10249 */ 10250 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10251 } 10252 10253 pos += 3; 10254 len -= 3; 10255 } 10256 10257 if (link_mask) { 10258 sdata_info(sdata, 10259 "mlo: reconf: no response for links=0x%x\n", 10260 link_mask); 10261 goto disconnect; 10262 } 10263 10264 if (!sdata->u.mgd.reconf.added_links) 10265 goto out; 10266 10267 if (len < 1 || len < 1 + *pos) { 10268 sdata_info(sdata, 10269 "mlo: reconf: invalid group key data length"); 10270 goto disconnect; 10271 } 10272 10273 /* The Group Key Data field must be present when links are added. This 10274 * field should be processed by userland. 10275 */ 10276 group_key_data_len = *pos++; 10277 10278 pos += group_key_data_len; 10279 len -= group_key_data_len + 1; 10280 10281 /* Process the information for the added links */ 10282 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10283 if (WARN_ON(!sta)) 10284 goto disconnect; 10285 10286 valid_links = sdata->vif.valid_links; 10287 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10288 if (!add_links_data->link[link_id].bss || 10289 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10290 continue; 10291 10292 valid_links |= BIT(link_id); 10293 if (ieee80211_sta_allocate_link(sta, link_id)) 10294 goto disconnect; 10295 } 10296 10297 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10298 link_mask = 0; 10299 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10300 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10301 struct ieee80211_link_data *link; 10302 struct link_sta_info *link_sta; 10303 u64 changed = 0; 10304 10305 if (!cbss) 10306 continue; 10307 10308 link = sdata_dereference(sdata->link[link_id], sdata); 10309 if (WARN_ON(!link)) 10310 goto disconnect; 10311 10312 link_info(link, 10313 "mlo: reconf: local address %pM, AP link address %pM\n", 10314 add_links_data->link[link_id].addr, 10315 add_links_data->link[link_id].bss->bssid); 10316 10317 link_sta = rcu_dereference_protected(sta->link[link_id], 10318 lockdep_is_held(&local->hw.wiphy->mtx)); 10319 if (WARN_ON(!link_sta)) 10320 goto disconnect; 10321 10322 if (!link->u.mgd.have_beacon) { 10323 const struct cfg80211_bss_ies *ies; 10324 10325 rcu_read_lock(); 10326 ies = rcu_dereference(cbss->beacon_ies); 10327 if (ies) 10328 link->u.mgd.have_beacon = true; 10329 else 10330 ies = rcu_dereference(cbss->ies); 10331 ieee80211_get_dtim(ies, 10332 &link->conf->sync_dtim_count, 10333 &link->u.mgd.dtim_period); 10334 link->conf->beacon_int = cbss->beacon_interval; 10335 rcu_read_unlock(); 10336 } 10337 10338 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10339 10340 link->u.mgd.conn = add_links_data->link[link_id].conn; 10341 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10342 true, &link->u.mgd.conn, 10343 sdata->u.mgd.userspace_selectors)) { 10344 link_info(link, "mlo: reconf: prep_channel failed\n"); 10345 goto disconnect; 10346 } 10347 10348 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10349 add_links_data->link[link_id].bss)) 10350 goto disconnect; 10351 10352 if (!ieee80211_assoc_config_link(link, link_sta, 10353 add_links_data->link[link_id].bss, 10354 mgmt, pos, len, 10355 &changed)) 10356 goto disconnect; 10357 10358 /* The AP MLD indicated success for this link, but the station 10359 * profile status indicated otherwise. Since there is an 10360 * inconsistency in the ML reconfiguration response, disconnect 10361 */ 10362 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10363 goto disconnect; 10364 10365 ieee80211_sta_init_nss(link_sta); 10366 if (ieee80211_sta_activate_link(sta, link_id)) 10367 goto disconnect; 10368 10369 changed |= ieee80211_link_set_associated(link, cbss); 10370 ieee80211_link_info_change_notify(sdata, link, changed); 10371 10372 ieee80211_recalc_smps(sdata, link); 10373 link_mask |= BIT(link_id); 10374 } 10375 10376 sdata_info(sdata, 10377 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10378 valid_links, link_mask); 10379 10380 /* links might have changed due to rejected ones, set them again */ 10381 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10382 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10383 10384 ieee80211_recalc_ps(local); 10385 ieee80211_recalc_ps_vif(sdata); 10386 10387 done_data.buf = (const u8 *)mgmt; 10388 done_data.len = orig_len; 10389 done_data.added_links = link_mask; 10390 10391 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10392 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10393 done_data.links[link_id].addr = 10394 add_links_data->link[link_id].addr; 10395 } 10396 10397 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10398 kfree(sdata->u.mgd.reconf.add_links_data); 10399 sdata->u.mgd.reconf.add_links_data = NULL; 10400 out: 10401 ieee80211_ml_reconf_reset(sdata); 10402 return; 10403 10404 disconnect: 10405 __ieee80211_disconnect(sdata); 10406 } 10407 10408 static struct sk_buff * 10409 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10410 struct ieee80211_mgd_assoc_data *add_links_data, 10411 u16 removed_links, __le16 ext_mld_capa_ops) 10412 { 10413 struct ieee80211_local *local = sdata->local; 10414 struct ieee80211_mgmt *mgmt; 10415 struct ieee80211_multi_link_elem *ml_elem; 10416 struct ieee80211_mle_basic_common_info *common; 10417 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10418 struct sk_buff *skb; 10419 size_t size; 10420 unsigned int link_id; 10421 __le16 eml_capa = 0, mld_capa_ops = 0; 10422 struct ieee80211_tx_info *info; 10423 u8 common_size, var_common_size; 10424 u8 *ml_elem_len; 10425 u16 capab = 0; 10426 10427 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10428 10429 /* Consider the maximal length of the reconfiguration ML element */ 10430 size += sizeof(struct ieee80211_multi_link_elem); 10431 10432 /* The Basic ML element and the Reconfiguration ML element have the same 10433 * fixed common information fields in the context of ML reconfiguration 10434 * action frame. The AP MLD MAC address must always be present 10435 */ 10436 common_size = sizeof(*common); 10437 10438 /* when adding links, the MLD capabilities must be present */ 10439 var_common_size = 0; 10440 if (add_links_data) { 10441 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10442 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10443 ieee80211_vif_type_p2p(&sdata->vif)); 10444 10445 if (ift_ext_capa) { 10446 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10447 mld_capa_ops = 10448 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10449 } 10450 10451 /* MLD capabilities and operation */ 10452 var_common_size += 2; 10453 10454 /* EML capabilities */ 10455 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10456 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10457 var_common_size += 2; 10458 } 10459 10460 if (ext_mld_capa_ops) 10461 var_common_size += 2; 10462 10463 /* Add the common information length */ 10464 size += common_size + var_common_size; 10465 10466 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10467 struct cfg80211_bss *cbss; 10468 size_t elems_len; 10469 10470 if (removed_links & BIT(link_id)) { 10471 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10472 ETH_ALEN; 10473 continue; 10474 } 10475 10476 if (!add_links_data || !add_links_data->link[link_id].bss) 10477 continue; 10478 10479 elems_len = add_links_data->link[link_id].elems_len; 10480 cbss = add_links_data->link[link_id].bss; 10481 10482 /* should be the same across all BSSes */ 10483 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10484 capab |= WLAN_CAPABILITY_PRIVACY; 10485 10486 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10487 ETH_ALEN; 10488 10489 /* WMM */ 10490 size += 9; 10491 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10492 elems_len); 10493 } 10494 10495 skb = alloc_skb(size, GFP_KERNEL); 10496 if (!skb) 10497 return NULL; 10498 10499 skb_reserve(skb, local->hw.extra_tx_headroom); 10500 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10501 u.action.u.ml_reconf_req)); 10502 10503 /* Add the MAC header */ 10504 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10505 IEEE80211_STYPE_ACTION); 10506 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10507 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10508 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10509 10510 /* Add the action frame fixed fields */ 10511 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10512 mgmt->u.action.u.ml_reconf_req.action_code = 10513 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10514 10515 /* allocate a dialog token and store it */ 10516 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10517 mgmt->u.action.u.ml_reconf_req.dialog_token = 10518 sdata->u.mgd.reconf.dialog_token; 10519 10520 /* Add the ML reconfiguration element and the common information */ 10521 skb_put_u8(skb, WLAN_EID_EXTENSION); 10522 ml_elem_len = skb_put(skb, 1); 10523 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10524 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10525 ml_elem->control = 10526 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10527 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10528 common = skb_put(skb, common_size); 10529 common->len = common_size + var_common_size; 10530 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10531 10532 if (add_links_data) { 10533 if (eml_capa & 10534 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10535 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10536 ml_elem->control |= 10537 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10538 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10539 } 10540 10541 ml_elem->control |= 10542 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10543 10544 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10545 } 10546 10547 if (ext_mld_capa_ops) { 10548 ml_elem->control |= 10549 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10550 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10551 } 10552 10553 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10554 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10555 10556 /* Add the per station profile */ 10557 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10558 u8 *subelem_len = NULL; 10559 u16 ctrl; 10560 const u8 *addr; 10561 10562 /* Skip links that are not changing */ 10563 if (!(removed_links & BIT(link_id)) && 10564 (!add_links_data || !add_links_data->link[link_id].bss)) 10565 continue; 10566 10567 ctrl = link_id | 10568 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10569 10570 if (removed_links & BIT(link_id)) { 10571 struct ieee80211_bss_conf *conf = 10572 sdata_dereference(sdata->vif.link_conf[link_id], 10573 sdata); 10574 if (!conf) 10575 continue; 10576 10577 addr = conf->addr; 10578 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10579 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10580 } else { 10581 addr = add_links_data->link[link_id].addr; 10582 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10583 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10584 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10585 } 10586 10587 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10588 subelem_len = skb_put(skb, 1); 10589 10590 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10591 skb_put_u8(skb, 1 + ETH_ALEN); 10592 skb_put_data(skb, addr, ETH_ALEN); 10593 10594 if (!(removed_links & BIT(link_id))) { 10595 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10596 size_t extra_used; 10597 void *capab_pos; 10598 u8 qos_info; 10599 10600 capab_pos = skb_put(skb, 2); 10601 10602 extra_used = 10603 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10604 add_links_data->link[link_id].elems, 10605 add_links_data->link[link_id].elems_len, 10606 link_id, NULL, 10607 link_present_elems, 10608 add_links_data); 10609 10610 if (add_links_data->link[link_id].elems) 10611 skb_put_data(skb, 10612 add_links_data->link[link_id].elems + 10613 extra_used, 10614 add_links_data->link[link_id].elems_len - 10615 extra_used); 10616 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10617 qos_info = sdata->u.mgd.uapsd_queues; 10618 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10619 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10620 } else { 10621 qos_info = 0; 10622 } 10623 10624 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10625 put_unaligned_le16(capab, capab_pos); 10626 } 10627 10628 ieee80211_fragment_element(skb, subelem_len, 10629 IEEE80211_MLE_SUBELEM_FRAGMENT); 10630 } 10631 10632 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10633 10634 info = IEEE80211_SKB_CB(skb); 10635 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10636 10637 return skb; 10638 } 10639 10640 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10641 struct cfg80211_ml_reconf_req *req) 10642 { 10643 struct ieee80211_local *local = sdata->local; 10644 struct ieee80211_mgd_assoc_data *data = NULL; 10645 struct sta_info *sta; 10646 struct sk_buff *skb; 10647 u16 added_links, new_valid_links; 10648 int link_id, err; 10649 10650 if (!ieee80211_vif_is_mld(&sdata->vif) || 10651 !(sdata->vif.cfg.mld_capa_op & 10652 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10653 return -EINVAL; 10654 10655 /* No support for concurrent ML reconfiguration operation */ 10656 if (sdata->u.mgd.reconf.added_links || 10657 sdata->u.mgd.reconf.removed_links) 10658 return -EBUSY; 10659 10660 added_links = 0; 10661 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10662 if (!req->add_links[link_id].bss) 10663 continue; 10664 10665 added_links |= BIT(link_id); 10666 } 10667 10668 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10669 if (WARN_ON(!sta)) 10670 return -ENOLINK; 10671 10672 /* Adding links to the set of valid link is done only after a successful 10673 * ML reconfiguration frame exchange. Here prepare the data for the ML 10674 * reconfiguration frame construction and allocate the required 10675 * resources 10676 */ 10677 if (added_links) { 10678 bool uapsd_supported; 10679 10680 data = kzalloc(sizeof(*data), GFP_KERNEL); 10681 if (!data) 10682 return -ENOMEM; 10683 10684 data->assoc_link_id = -1; 10685 data->wmm = true; 10686 10687 uapsd_supported = true; 10688 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10689 link_id++) { 10690 struct ieee80211_supported_band *sband; 10691 struct cfg80211_bss *link_cbss = 10692 req->add_links[link_id].bss; 10693 struct ieee80211_bss *bss; 10694 10695 if (!link_cbss) 10696 continue; 10697 10698 bss = (void *)link_cbss->priv; 10699 10700 if (!bss->wmm_used) { 10701 err = -EINVAL; 10702 goto err_free; 10703 } 10704 10705 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10706 err = -EINVAL; 10707 goto err_free; 10708 } 10709 10710 eth_random_addr(data->link[link_id].addr); 10711 data->link[link_id].conn = 10712 ieee80211_conn_settings_unlimited; 10713 sband = 10714 local->hw.wiphy->bands[link_cbss->channel->band]; 10715 10716 ieee80211_determine_our_sta_mode(sdata, sband, 10717 NULL, true, link_id, 10718 &data->link[link_id].conn); 10719 10720 data->link[link_id].bss = link_cbss; 10721 data->link[link_id].disabled = 10722 req->add_links[link_id].disabled; 10723 data->link[link_id].elems = 10724 (u8 *)req->add_links[link_id].elems; 10725 data->link[link_id].elems_len = 10726 req->add_links[link_id].elems_len; 10727 10728 if (!bss->uapsd_supported) 10729 uapsd_supported = false; 10730 10731 if (data->link[link_id].conn.mode < 10732 IEEE80211_CONN_MODE_EHT) { 10733 err = -EINVAL; 10734 goto err_free; 10735 } 10736 10737 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10738 link_id); 10739 if (err) { 10740 err = -EINVAL; 10741 goto err_free; 10742 } 10743 } 10744 10745 /* Require U-APSD support if we enabled it */ 10746 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10747 !uapsd_supported) { 10748 err = -EINVAL; 10749 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10750 goto err_free; 10751 } 10752 10753 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10754 link_id++) { 10755 if (!data->link[link_id].bss) 10756 continue; 10757 10758 /* only used to verify the mode, nothing is allocated */ 10759 err = ieee80211_prep_channel(sdata, NULL, link_id, 10760 data->link[link_id].bss, 10761 true, 10762 &data->link[link_id].conn, 10763 sdata->u.mgd.userspace_selectors); 10764 if (err) 10765 goto err_free; 10766 } 10767 } 10768 10769 /* link removal is done before the ML reconfiguration frame exchange so 10770 * that these links will not be used between their removal by the AP MLD 10771 * and before the station got the ML reconfiguration response. Based on 10772 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10773 * link removal request. 10774 */ 10775 if (req->rem_links) { 10776 u16 new_active_links = 10777 sdata->vif.active_links & ~req->rem_links; 10778 10779 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10780 10781 /* Should not be left with no valid links to perform the 10782 * ML reconfiguration 10783 */ 10784 if (!new_valid_links || 10785 !(new_valid_links & ~sdata->vif.dormant_links)) { 10786 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10787 err = -EINVAL; 10788 goto err_free; 10789 } 10790 10791 if (new_active_links != sdata->vif.active_links) { 10792 if (!new_active_links) 10793 new_active_links = 10794 BIT(__ffs(new_valid_links & 10795 ~sdata->vif.dormant_links)); 10796 10797 err = ieee80211_set_active_links(&sdata->vif, 10798 new_active_links); 10799 if (err) { 10800 sdata_info(sdata, 10801 "mlo: reconf: failed set active links\n"); 10802 goto err_free; 10803 } 10804 } 10805 } 10806 10807 /* Build the SKB before the link removal as the construction of the 10808 * station info for removed links requires the local address. 10809 * Invalidate the removed links, so that the transmission of the ML 10810 * reconfiguration request frame would not be done using them, as the AP 10811 * is expected to send the ML reconfiguration response frame on the link 10812 * on which the request was received. 10813 */ 10814 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10815 cpu_to_le16(req->ext_mld_capa_ops)); 10816 if (!skb) { 10817 err = -ENOMEM; 10818 goto err_free; 10819 } 10820 10821 if (req->rem_links) { 10822 u16 new_dormant_links = 10823 sdata->vif.dormant_links & ~req->rem_links; 10824 10825 err = ieee80211_vif_set_links(sdata, new_valid_links, 10826 new_dormant_links); 10827 if (err) { 10828 sdata_info(sdata, 10829 "mlo: reconf: failed set valid links\n"); 10830 kfree_skb(skb); 10831 goto err_free; 10832 } 10833 10834 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10835 link_id++) { 10836 if (!(req->rem_links & BIT(link_id))) 10837 continue; 10838 10839 ieee80211_sta_remove_link(sta, link_id); 10840 } 10841 10842 /* notify the driver and upper layers */ 10843 ieee80211_vif_cfg_change_notify(sdata, 10844 BSS_CHANGED_MLD_VALID_LINKS); 10845 cfg80211_links_removed(sdata->dev, req->rem_links); 10846 } 10847 10848 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10849 added_links, req->rem_links); 10850 10851 ieee80211_tx_skb(sdata, skb); 10852 10853 sdata->u.mgd.reconf.added_links = added_links; 10854 sdata->u.mgd.reconf.add_links_data = data; 10855 sdata->u.mgd.reconf.removed_links = req->rem_links; 10856 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10857 &sdata->u.mgd.reconf.wk, 10858 IEEE80211_ASSOC_TIMEOUT_SHORT); 10859 return 0; 10860 10861 err_free: 10862 kfree(data); 10863 return err; 10864 } 10865 10866 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10867 { 10868 unsigned long valid_links = sdata->vif.valid_links; 10869 u8 link_id; 10870 10871 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10872 10873 if (!ieee80211_vif_is_mld(&sdata->vif)) 10874 return false; 10875 10876 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10877 struct ieee80211_bss_conf *bss_conf = 10878 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10879 10880 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10881 return false; 10882 } 10883 10884 return true; 10885 } 10886 10887 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10888 { 10889 struct ieee80211_local *local = sdata->local; 10890 struct ieee80211_mgmt *mgmt; 10891 struct sk_buff *skb; 10892 int frame_len = offsetofend(struct ieee80211_mgmt, 10893 u.action.u.epcs) + (enable ? 1 : 0); 10894 10895 if (!ieee80211_mgd_epcs_supp(sdata)) 10896 return -EINVAL; 10897 10898 if (sdata->u.mgd.epcs.enabled == enable && 10899 !sdata->u.mgd.epcs.dialog_token) 10900 return 0; 10901 10902 /* Do not allow enabling EPCS if the AP didn't respond yet. 10903 * However, allow disabling EPCS in such a case. 10904 */ 10905 if (sdata->u.mgd.epcs.dialog_token && enable) 10906 return -EALREADY; 10907 10908 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10909 if (!skb) 10910 return -ENOBUFS; 10911 10912 skb_reserve(skb, local->hw.extra_tx_headroom); 10913 mgmt = skb_put_zero(skb, frame_len); 10914 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10915 IEEE80211_STYPE_ACTION); 10916 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10917 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10918 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10919 10920 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10921 if (enable) { 10922 u8 *pos = mgmt->u.action.u.epcs.variable; 10923 10924 mgmt->u.action.u.epcs.action_code = 10925 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10926 10927 *pos = ++sdata->u.mgd.dialog_token_alloc; 10928 sdata->u.mgd.epcs.dialog_token = *pos; 10929 } else { 10930 mgmt->u.action.u.epcs.action_code = 10931 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10932 10933 ieee80211_epcs_teardown(sdata); 10934 ieee80211_epcs_changed(sdata, false); 10935 } 10936 10937 ieee80211_tx_skb(sdata, skb); 10938 return 0; 10939 } 10940 10941 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10942 struct ieee802_11_elems *elems) 10943 { 10944 const struct element *sub; 10945 size_t scratch_len = elems->ml_epcs_len; 10946 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10947 10948 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10949 10950 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10951 return; 10952 10953 if (WARN_ON(!scratch)) 10954 return; 10955 10956 /* Directly parse the sub elements as the common information doesn't 10957 * hold any useful information. 10958 */ 10959 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10960 elems->ml_epcs_len) { 10961 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10962 struct ieee80211_link_data *link; 10963 u8 *pos = (void *)sub->data; 10964 u16 control; 10965 ssize_t len; 10966 u8 link_id; 10967 10968 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10969 continue; 10970 10971 if (sub->datalen < sizeof(control)) 10972 break; 10973 10974 control = get_unaligned_le16(pos); 10975 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10976 10977 link = sdata_dereference(sdata->link[link_id], sdata); 10978 if (!link) 10979 continue; 10980 10981 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10982 elems->ml_epcs_len, 10983 scratch, scratch_len, 10984 IEEE80211_MLE_SUBELEM_FRAGMENT); 10985 if (len < (ssize_t)sizeof(control)) 10986 continue; 10987 10988 pos = scratch + sizeof(control); 10989 len -= sizeof(control); 10990 10991 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10992 if (!link_elems) 10993 continue; 10994 10995 if (ieee80211_sta_wmm_params(sdata->local, link, 10996 link_elems->wmm_param, 10997 link_elems->wmm_param_len, 10998 link_elems->mu_edca_param_set)) 10999 ieee80211_link_info_change_notify(sdata, link, 11000 BSS_CHANGED_QOS); 11001 } 11002 } 11003 11004 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11005 struct ieee80211_mgmt *mgmt, size_t len) 11006 { 11007 struct ieee802_11_elems *elems __free(kfree) = NULL; 11008 size_t ies_len; 11009 u16 status_code; 11010 u8 *pos, dialog_token; 11011 11012 if (!ieee80211_mgd_epcs_supp(sdata)) 11013 return; 11014 11015 /* Handle dialog token and status code */ 11016 pos = mgmt->u.action.u.epcs.variable; 11017 dialog_token = *pos; 11018 status_code = get_unaligned_le16(pos + 1); 11019 11020 /* An EPCS enable response with dialog token == 0 is an unsolicited 11021 * notification from the AP MLD. In such a case, EPCS should already be 11022 * enabled and status must be success 11023 */ 11024 if (!dialog_token && 11025 (!sdata->u.mgd.epcs.enabled || 11026 status_code != WLAN_STATUS_SUCCESS)) 11027 return; 11028 11029 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11030 return; 11031 11032 sdata->u.mgd.epcs.dialog_token = 0; 11033 11034 if (status_code != WLAN_STATUS_SUCCESS) 11035 return; 11036 11037 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11038 ies_len = len - offsetof(struct ieee80211_mgmt, 11039 u.action.u.epcs.variable) - 11040 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11041 11042 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 11043 if (!elems) 11044 return; 11045 11046 ieee80211_ml_epcs(sdata, elems); 11047 ieee80211_epcs_changed(sdata, true); 11048 } 11049 11050 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11051 struct ieee80211_mgmt *mgmt, size_t len) 11052 { 11053 if (!ieee80211_vif_is_mld(&sdata->vif) || 11054 !sdata->u.mgd.epcs.enabled) 11055 return; 11056 11057 ieee80211_epcs_teardown(sdata); 11058 ieee80211_epcs_changed(sdata, false); 11059 } 11060