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 (100 * USEC_PER_MSEC) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 172 ignore_ht_channel_mismatch = false; 173 174 *chandef = (struct cfg80211_chan_def) { 175 .chan = channel, 176 .width = NL80211_CHAN_WIDTH_20_NOHT, 177 .center_freq1 = channel->center_freq, 178 .freq1_offset = channel->freq_offset, 179 }; 180 181 /* get special S1G case out of the way */ 182 if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 184 chandef)) { 185 /* Fallback to default 1MHz */ 186 chandef->width = NL80211_CHAN_WIDTH_1; 187 chandef->s1g_primary_2mhz = false; 188 } 189 190 return IEEE80211_CONN_MODE_S1G; 191 } 192 193 /* get special 6 GHz case out of the way */ 194 if (sband->band == NL80211_BAND_6GHZ) { 195 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 196 197 /* this is an error */ 198 if (conn->mode < IEEE80211_CONN_MODE_HE) 199 return IEEE80211_CONN_MODE_LEGACY; 200 201 if (!elems->he_6ghz_capa || !elems->he_cap) { 202 sdata_info(sdata, 203 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 204 return IEEE80211_CONN_MODE_LEGACY; 205 } 206 207 if (!eht_oper || !elems->eht_cap) { 208 eht_oper = NULL; 209 mode = IEEE80211_CONN_MODE_HE; 210 } 211 212 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 213 eht_oper, chandef)) { 214 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 215 return IEEE80211_CONN_MODE_LEGACY; 216 } 217 218 return mode; 219 } 220 221 /* now we have the progression HT, VHT, ... */ 222 if (conn->mode < IEEE80211_CONN_MODE_HT) 223 return IEEE80211_CONN_MODE_LEGACY; 224 225 if (!ht_oper || !elems->ht_cap_elem) 226 return IEEE80211_CONN_MODE_LEGACY; 227 228 chandef->width = NL80211_CHAN_WIDTH_20; 229 230 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 231 channel->band); 232 /* check that channel matches the right operating channel */ 233 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 234 /* 235 * It's possible that some APs are confused here; 236 * Netgear WNDR3700 sometimes reports 4 higher than 237 * the actual channel in association responses, but 238 * since we look at probe response/beacon data here 239 * it should be OK. 240 */ 241 sdata_info(sdata, 242 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 243 channel->center_freq, ht_cfreq, 244 ht_oper->primary_chan, channel->band); 245 return IEEE80211_CONN_MODE_LEGACY; 246 } 247 248 ieee80211_chandef_ht_oper(ht_oper, chandef); 249 250 if (conn->mode < IEEE80211_CONN_MODE_VHT) 251 return IEEE80211_CONN_MODE_HT; 252 253 vht_chandef = *chandef; 254 255 /* 256 * having he_cap/he_oper parsed out implies we're at 257 * least operating as HE STA 258 */ 259 if (elems->he_cap && he_oper && 260 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 261 struct ieee80211_vht_operation he_oper_vht_cap; 262 263 /* 264 * Set only first 3 bytes (other 2 aren't used in 265 * ieee80211_chandef_vht_oper() anyway) 266 */ 267 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 268 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 269 270 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 271 &he_oper_vht_cap, ht_oper, 272 &vht_chandef)) { 273 sdata_info(sdata, 274 "HE AP VHT information is invalid, disabling HE\n"); 275 /* this will cause us to re-parse as VHT STA */ 276 return IEEE80211_CONN_MODE_VHT; 277 } 278 } else if (!vht_oper || !elems->vht_cap_elem) { 279 if (sband->band == NL80211_BAND_5GHZ) 280 return IEEE80211_CONN_MODE_HT; 281 no_vht = true; 282 } else if (sband->band == NL80211_BAND_2GHZ) { 283 no_vht = true; 284 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 285 vht_cap_info, 286 vht_oper, ht_oper, 287 &vht_chandef)) { 288 sdata_info(sdata, 289 "AP VHT information is invalid, disabling VHT\n"); 290 return IEEE80211_CONN_MODE_HT; 291 } 292 293 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 294 sdata_info(sdata, 295 "AP VHT information doesn't match HT, disabling VHT\n"); 296 return IEEE80211_CONN_MODE_HT; 297 } 298 299 *chandef = vht_chandef; 300 301 /* stick to current max mode if we or the AP don't have HE */ 302 if (conn->mode < IEEE80211_CONN_MODE_HE || 303 !elems->he_operation || !elems->he_cap) { 304 if (no_vht) 305 return IEEE80211_CONN_MODE_HT; 306 return IEEE80211_CONN_MODE_VHT; 307 } 308 309 /* stick to HE if we or the AP don't have EHT */ 310 if (conn->mode < IEEE80211_CONN_MODE_EHT || 311 !eht_oper || !elems->eht_cap) 312 return IEEE80211_CONN_MODE_HE; 313 314 /* 315 * handle the case that the EHT operation indicates that it holds EHT 316 * operation information (in case that the channel width differs from 317 * the channel width reported in HT/VHT/HE). 318 */ 319 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 320 struct cfg80211_chan_def eht_chandef = *chandef; 321 322 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 323 &eht_chandef); 324 325 eht_chandef.punctured = 326 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 327 328 if (!cfg80211_chandef_valid(&eht_chandef)) { 329 sdata_info(sdata, 330 "AP EHT information is invalid, disabling EHT\n"); 331 return IEEE80211_CONN_MODE_HE; 332 } 333 334 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 335 sdata_info(sdata, 336 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 337 return IEEE80211_CONN_MODE_HE; 338 } 339 340 *chandef = eht_chandef; 341 } 342 343 return IEEE80211_CONN_MODE_EHT; 344 } 345 346 static bool 347 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 348 struct ieee80211_supported_band *sband, 349 const struct ieee80211_ht_operation *ht_op) 350 { 351 struct ieee80211_sta_ht_cap sta_ht_cap; 352 int i; 353 354 if (sband->band == NL80211_BAND_6GHZ) 355 return true; 356 357 if (!ht_op) 358 return false; 359 360 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 361 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 362 363 /* 364 * P802.11REVme/D7.0 - 6.5.4.2.4 365 * ... 366 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 367 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 368 * in the HT Operation parameter that contains any unsupported MCSs, 369 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 370 * contain a ResultCode parameter that is not set to the value SUCCESS. 371 * ... 372 */ 373 374 /* Simply check that all basic rates are in the STA RX mask */ 375 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 376 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 377 ht_op->basic_set[i]) 378 return false; 379 } 380 381 return true; 382 } 383 384 static bool 385 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 386 int link_id, 387 struct ieee80211_supported_band *sband, 388 const struct ieee80211_vht_operation *vht_op) 389 { 390 struct ieee80211_sta_vht_cap sta_vht_cap; 391 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 392 int nss; 393 394 if (sband->band != NL80211_BAND_5GHZ) 395 return true; 396 397 if (!vht_op) 398 return false; 399 400 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 401 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 402 403 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 404 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 405 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 406 407 /* 408 * Many APs are incorrectly advertising an all-zero value here, 409 * which really means MCS 0-7 are required for 1-8 streams, but 410 * they don't really mean it that way. 411 * Some other APs are incorrectly advertising 3 spatial streams 412 * with MCS 0-7 are required, but don't really mean it that way 413 * and we'll connect only with HT, rather than even HE. 414 * As a result, unfortunately the VHT basic MCS/NSS set cannot 415 * be used at all, so check it only in strict mode. 416 */ 417 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 418 return true; 419 420 /* 421 * P802.11REVme/D7.0 - 6.5.4.2.4 422 * ... 423 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 424 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 425 * field in the VHT Operation parameter that contains any unsupported 426 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 427 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 428 * that is not set to the value SUCCESS. 429 * ... 430 */ 431 for (nss = 8; nss > 0; nss--) { 432 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 433 u8 sta_rx_val; 434 u8 sta_tx_val; 435 436 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 437 continue; 438 439 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 440 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 441 442 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 443 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 444 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 445 link_id_info(sdata, link_id, 446 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 447 nss, sta_rx_val, sta_tx_val, ap_op_val); 448 return false; 449 } 450 } 451 452 return true; 453 } 454 455 static bool 456 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 457 int link_id, 458 const struct ieee80211_he_cap_elem *he_cap, 459 const struct ieee80211_he_operation *he_op) 460 { 461 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 462 u16 mcs_80_map_tx, mcs_80_map_rx; 463 u16 ap_min_req_set; 464 int nss; 465 466 if (!he_cap) 467 return false; 468 469 /* mcs_nss is right after he_cap info */ 470 he_mcs_nss_supp = (void *)(he_cap + 1); 471 472 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 473 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 474 475 /* P802.11-REVme/D0.3 476 * 27.1.1 Introduction to the HE PHY 477 * ... 478 * An HE STA shall support the following features: 479 * ... 480 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 481 * supported channel widths for HE SU PPDUs 482 */ 483 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 484 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 485 link_id_info(sdata, link_id, 486 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 487 mcs_80_map_tx, mcs_80_map_rx); 488 return false; 489 } 490 491 if (!he_op) 492 return true; 493 494 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 495 496 /* 497 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 498 * zeroes, which is nonsense, and completely inconsistent with itself 499 * (it doesn't have 8 streams). Accept the settings in this case anyway. 500 */ 501 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 502 return true; 503 504 /* make sure the AP is consistent with itself 505 * 506 * P802.11-REVme/D0.3 507 * 26.17.1 Basic HE BSS operation 508 * 509 * A STA that is operating in an HE BSS shall be able to receive and 510 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 511 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 512 * MLME-START.request primitive and shall be able to receive at each of 513 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 514 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 515 * primitive 516 */ 517 for (nss = 8; nss > 0; nss--) { 518 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 519 u8 ap_rx_val; 520 u8 ap_tx_val; 521 522 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 523 continue; 524 525 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 526 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 527 528 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 529 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 530 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 531 link_id_info(sdata, link_id, 532 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 533 nss, ap_rx_val, ap_tx_val, ap_op_val); 534 return false; 535 } 536 } 537 538 return true; 539 } 540 541 static bool 542 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 543 struct ieee80211_supported_band *sband, 544 const struct ieee80211_he_operation *he_op) 545 { 546 const struct ieee80211_sta_he_cap *sta_he_cap = 547 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 548 u16 ap_min_req_set; 549 int i; 550 551 if (!sta_he_cap || !he_op) 552 return false; 553 554 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 555 556 /* 557 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 558 * zeroes, which is nonsense, and completely inconsistent with itself 559 * (it doesn't have 8 streams). Accept the settings in this case anyway. 560 */ 561 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 562 return true; 563 564 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 565 for (i = 0; i < 3; i++) { 566 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 567 &sta_he_cap->he_mcs_nss_supp; 568 u16 sta_mcs_map_rx = 569 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 570 u16 sta_mcs_map_tx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 572 u8 nss; 573 bool verified = true; 574 575 /* 576 * For each band there is a maximum of 8 spatial streams 577 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 578 * of 2 bits per NSS (1-8), with the values defined in enum 579 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 580 * capabilities aren't less than the AP's minimum requirements 581 * for this HE BSS per SS. 582 * It is enough to find one such band that meets the reqs. 583 */ 584 for (nss = 8; nss > 0; nss--) { 585 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 586 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 587 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 588 589 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 590 continue; 591 592 /* 593 * Make sure the HE AP doesn't require MCSs that aren't 594 * supported by the client as required by spec 595 * 596 * P802.11-REVme/D0.3 597 * 26.17.1 Basic HE BSS operation 598 * 599 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 600 * a BSS, unless it supports (i.e., is able to both transmit and 601 * receive using) all of the <HE-MCS, NSS> tuples in the basic 602 * HE-MCS and NSS set. 603 */ 604 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 605 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 606 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 607 verified = false; 608 break; 609 } 610 } 611 612 if (verified) 613 return true; 614 } 615 616 /* If here, STA doesn't meet AP's HE min requirements */ 617 return false; 618 } 619 620 static u8 621 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 622 const struct ieee80211_sta_eht_cap *sta_eht_cap, 623 unsigned int idx, int bw) 624 { 625 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 626 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 627 628 /* handle us being a 20 MHz-only EHT STA - with four values 629 * for MCS 0-7, 8-9, 10-11, 12-13. 630 */ 631 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 632 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 633 634 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 635 if (idx > 0) 636 idx--; 637 638 switch (bw) { 639 case 0: 640 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 641 case 1: 642 if (!(he_phy_cap0 & 643 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 644 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 645 return 0xff; /* pass check */ 646 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 647 case 2: 648 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 649 return 0xff; /* pass check */ 650 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 651 } 652 653 WARN_ON(1); 654 return 0; 655 } 656 657 static bool 658 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 659 struct ieee80211_supported_band *sband, 660 const struct ieee80211_eht_operation *eht_op) 661 { 662 const struct ieee80211_sta_he_cap *sta_he_cap = 663 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 664 const struct ieee80211_sta_eht_cap *sta_eht_cap = 665 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 667 unsigned int i; 668 669 if (!sta_he_cap || !sta_eht_cap || !eht_op) 670 return false; 671 672 req = &eht_op->basic_mcs_nss; 673 674 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 675 u8 req_rx_nss, req_tx_nss; 676 unsigned int bw; 677 678 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 679 IEEE80211_EHT_MCS_NSS_RX); 680 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_TX); 682 683 for (bw = 0; bw < 3; bw++) { 684 u8 have, have_rx_nss, have_tx_nss; 685 686 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 687 sta_eht_cap, 688 i, bw); 689 have_rx_nss = u8_get_bits(have, 690 IEEE80211_EHT_MCS_NSS_RX); 691 have_tx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_TX); 693 694 if (req_rx_nss > have_rx_nss || 695 req_tx_nss > have_tx_nss) 696 return false; 697 } 698 } 699 700 return true; 701 } 702 703 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 704 const u8 *supp_rates, 705 unsigned int supp_rates_len, 706 const u8 *ext_supp_rates, 707 unsigned int ext_supp_rates_len, 708 u32 *rates, u32 *basic_rates, 709 unsigned long *unknown_rates_selectors, 710 bool *have_higher_than_11mbit, 711 int *min_rate, int *min_rate_index) 712 { 713 int i, j; 714 715 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 716 u8 supp_rate = i < supp_rates_len ? 717 supp_rates[i] : 718 ext_supp_rates[i - supp_rates_len]; 719 int rate = supp_rate & 0x7f; 720 bool is_basic = !!(supp_rate & 0x80); 721 722 if ((rate * 5) > 110 && have_higher_than_11mbit) 723 *have_higher_than_11mbit = true; 724 725 /* 726 * Skip membership selectors since they're not rates. 727 * 728 * Note: Even though the membership selector and the basic 729 * rate flag share the same bit, they are not exactly 730 * the same. 731 */ 732 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 733 if (unknown_rates_selectors) 734 set_bit(rate, unknown_rates_selectors); 735 continue; 736 } 737 738 for (j = 0; j < sband->n_bitrates; j++) { 739 struct ieee80211_rate *br; 740 int brate; 741 742 br = &sband->bitrates[j]; 743 744 brate = DIV_ROUND_UP(br->bitrate, 5); 745 if (brate == rate) { 746 if (rates) 747 *rates |= BIT(j); 748 if (is_basic && basic_rates) 749 *basic_rates |= BIT(j); 750 if (min_rate && (rate * 5) < *min_rate) { 751 *min_rate = rate * 5; 752 if (min_rate_index) 753 *min_rate_index = j; 754 } 755 break; 756 } 757 } 758 759 /* Handle an unknown entry as if it is an unknown selector */ 760 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 761 set_bit(rate, unknown_rates_selectors); 762 } 763 } 764 765 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 766 const struct cfg80211_chan_def *chandef, 767 u32 prohibited_flags) 768 { 769 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 770 chandef, prohibited_flags)) 771 return false; 772 773 if (chandef->punctured && 774 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 775 return false; 776 777 return true; 778 } 779 780 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 781 { 782 if (c->width == NL80211_CHAN_WIDTH_80P80) 783 return 4 + 4; 784 785 return cfg80211_chandef_get_width(c) / 20; 786 } 787 788 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 789 { 790 switch (c->width) { 791 case NL80211_CHAN_WIDTH_20: 792 case NL80211_CHAN_WIDTH_20_NOHT: 793 return 1; 794 case NL80211_CHAN_WIDTH_40: 795 return 2; 796 case NL80211_CHAN_WIDTH_80P80: 797 case NL80211_CHAN_WIDTH_80: 798 return 3; 799 case NL80211_CHAN_WIDTH_160: 800 return 4; 801 case NL80211_CHAN_WIDTH_320: 802 return 5; 803 default: 804 WARN_ON(1); 805 return 0; 806 } 807 } 808 809 VISIBLE_IF_MAC80211_KUNIT int 810 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 811 u8 n_partial_subchans) 812 { 813 int n = ieee80211_chandef_num_subchans(ap); 814 struct cfg80211_chan_def tmp = *ap; 815 int offset = 0; 816 817 /* 818 * Given a chandef (in this context, it's the AP's) and a number 819 * of subchannels that we want to look at ('n_partial_subchans'), 820 * calculate the offset in number of subchannels between the full 821 * and the subset with the desired width. 822 */ 823 824 /* same number of subchannels means no offset, obviously */ 825 if (n == n_partial_subchans) 826 return 0; 827 828 /* don't WARN - misconfigured APs could cause this if their N > width */ 829 if (n < n_partial_subchans) 830 return 0; 831 832 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 833 u32 prev = tmp.center_freq1; 834 835 ieee80211_chandef_downgrade(&tmp, NULL); 836 837 /* 838 * if center_freq moved up, half the original channels 839 * are gone now but were below, so increase offset 840 */ 841 if (prev < tmp.center_freq1) 842 offset += ieee80211_chandef_num_subchans(&tmp); 843 } 844 845 /* 846 * 80+80 with secondary 80 below primary - four subchannels for it 847 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 848 */ 849 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 850 ap->center_freq2 < ap->center_freq1) 851 offset += 4; 852 853 return offset; 854 } 855 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 856 857 VISIBLE_IF_MAC80211_KUNIT void 858 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 859 const struct cfg80211_chan_def *ap, 860 const struct cfg80211_chan_def *used) 861 { 862 u8 needed = ieee80211_chandef_num_subchans(used); 863 u8 have = ieee80211_chandef_num_subchans(ap); 864 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 865 u8 offset; 866 867 if (!psd->valid) 868 return; 869 870 /* if N is zero, all defaults were used, no point in rearranging */ 871 if (!psd->n) 872 goto out; 873 874 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 875 876 /* 877 * This assumes that 'N' is consistent with the HE channel, as 878 * it should be (otherwise the AP is broken). 879 * 880 * In psd->power we have values in the order 0..N, 0..K, where 881 * N+K should cover the entire channel per 'ap', but even if it 882 * doesn't then we've pre-filled 'unlimited' as defaults. 883 * 884 * But this is all the wrong order, we want to have them in the 885 * order of the 'used' channel. 886 * 887 * So for example, we could have a 320 MHz EHT AP, which has the 888 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 889 * seem to be considered for the TPE), as follows: 890 * 891 * EHT 320: | | | | | | | | | | | | | | | | | 892 * HE 80: | | | | | 893 * used 160: | | | | | | | | | 894 * 895 * N entries: |--|--|--|--| 896 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 897 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 898 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 899 * used chan: 0 1 2 3 4 5 6 7 900 * 901 * The idx in the power array ('power idx') is like this since it 902 * comes directly from the element's N and K entries in their 903 * element order, and those are this way for HE compatibility. 904 * 905 * Rearrange them as desired here, first by putting them into the 906 * 'full chan' order, and then selecting the necessary subset for 907 * the 'used chan'. 908 */ 909 910 /* first reorder according to AP channel */ 911 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 912 for (int i = 0; i < have; i++) { 913 if (i < offset) 914 tmp[i] = psd->power[i + psd->n]; 915 else if (i < offset + psd->n) 916 tmp[i] = psd->power[i - offset]; 917 else 918 tmp[i] = psd->power[i]; 919 } 920 921 /* 922 * and then select the subset for the used channel 923 * (set everything to defaults first in case a driver is confused) 924 */ 925 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 926 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 927 for (int i = 0; i < needed; i++) 928 psd->power[i] = tmp[offset + i]; 929 930 out: 931 /* limit, but don't lie if there are defaults in the data */ 932 if (needed < psd->count) 933 psd->count = needed; 934 } 935 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 936 937 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 938 const struct cfg80211_chan_def *ap, 939 const struct cfg80211_chan_def *used) 940 { 941 /* ignore this completely for narrow/invalid channels */ 942 if (!ieee80211_chandef_num_subchans(ap) || 943 !ieee80211_chandef_num_subchans(used)) { 944 ieee80211_clear_tpe(tpe); 945 return; 946 } 947 948 for (int i = 0; i < 2; i++) { 949 int needed_pwr_count; 950 951 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 952 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 953 954 /* limit this to the widths we actually need */ 955 needed_pwr_count = ieee80211_chandef_num_widths(used); 956 if (needed_pwr_count < tpe->max_local[i].count) 957 tpe->max_local[i].count = needed_pwr_count; 958 if (needed_pwr_count < tpe->max_reg_client[i].count) 959 tpe->max_reg_client[i].count = needed_pwr_count; 960 } 961 } 962 963 /* 964 * The AP part of the channel request is used to distinguish settings 965 * to the device used for wider bandwidth OFDMA. This is used in the 966 * channel context code to assign two channel contexts even if they're 967 * both for the same channel, if the AP bandwidths are incompatible. 968 * If not EHT (or driver override) then ap.chan == NULL indicates that 969 * there's no wider BW OFDMA used. 970 */ 971 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 972 struct ieee80211_chan_req *chanreq, 973 struct ieee80211_conn_settings *conn, 974 struct cfg80211_chan_def *ap_chandef) 975 { 976 chanreq->ap.chan = NULL; 977 978 if (conn->mode < IEEE80211_CONN_MODE_EHT) 979 return; 980 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 981 return; 982 983 chanreq->ap = *ap_chandef; 984 } 985 986 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 987 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 988 struct ieee80211_conn_settings *conn, 989 struct cfg80211_bss *cbss, int link_id, 990 struct ieee80211_chan_req *chanreq, 991 struct cfg80211_chan_def *ap_chandef, 992 unsigned long *userspace_selectors) 993 { 994 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 995 struct ieee80211_bss *bss = (void *)cbss->priv; 996 struct ieee80211_channel *channel = cbss->channel; 997 struct ieee80211_elems_parse_params parse_params = { 998 .link_id = -1, 999 .from_ap = true, 1000 .start = ies->data, 1001 .len = ies->len, 1002 .type = ies->from_beacon ? 1003 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1004 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1005 }; 1006 struct ieee802_11_elems *elems; 1007 struct ieee80211_supported_band *sband; 1008 enum ieee80211_conn_mode ap_mode; 1009 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1010 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1011 int ret; 1012 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_hrtimer_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 u32 csa_time_tu; 2767 ktime_t now; 2768 int res; 2769 2770 lockdep_assert_wiphy(local->hw.wiphy); 2771 2772 if (csa_elems) { 2773 struct cfg80211_bss *cbss = link->conf->bss; 2774 enum nl80211_band current_band; 2775 struct ieee80211_bss *bss; 2776 2777 if (WARN_ON(!cbss)) 2778 return; 2779 2780 current_band = cbss->channel->band; 2781 bss = (void *)cbss->priv; 2782 2783 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2784 current_band, 2785 bss->vht_cap_info, 2786 &link->u.mgd.conn, 2787 link->u.mgd.bssid, 2788 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2789 &csa_ie); 2790 if (res == 0) { 2791 ch_switch.block_tx = csa_ie.mode; 2792 ch_switch.chandef = csa_ie.chanreq.oper; 2793 ch_switch.count = csa_ie.count; 2794 ch_switch.delay = csa_ie.max_switch_time; 2795 } 2796 2797 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2798 } else { 2799 /* 2800 * If there was no per-STA profile for this link, we 2801 * get called with csa_elems == NULL. This of course means 2802 * there are no CSA elements, so set res=1 indicating 2803 * no more CSA. 2804 */ 2805 res = 1; 2806 } 2807 2808 if (res < 0) { 2809 /* ignore this case, not a protected frame */ 2810 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2811 return; 2812 goto drop_connection; 2813 } 2814 2815 if (link->conf->csa_active) { 2816 switch (source) { 2817 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2818 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2819 /* already processing - disregard action frames */ 2820 return; 2821 case IEEE80211_CSA_SOURCE_BEACON: 2822 if (link->u.mgd.csa.waiting_bcn) { 2823 ieee80211_chswitch_post_beacon(link); 2824 /* 2825 * If the CSA is still present after the switch 2826 * we need to consider it as a new CSA (possibly 2827 * to self). This happens by not returning here 2828 * so we'll get to the check below. 2829 */ 2830 } else if (res) { 2831 ieee80211_sta_abort_chanswitch(link); 2832 return; 2833 } else { 2834 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2835 return; 2836 } 2837 break; 2838 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2839 /* active link: we want to see the beacon to continue */ 2840 if (ieee80211_vif_link_active(&sdata->vif, 2841 link->link_id)) 2842 return; 2843 2844 /* switch work ran, so just complete the process */ 2845 if (link->u.mgd.csa.waiting_bcn) { 2846 ieee80211_chswitch_post_beacon(link); 2847 /* 2848 * If the CSA is still present after the switch 2849 * we need to consider it as a new CSA (possibly 2850 * to self). This happens by not returning here 2851 * so we'll get to the check below. 2852 */ 2853 break; 2854 } 2855 2856 /* link still has CSA but we already know, do nothing */ 2857 if (!res) 2858 return; 2859 2860 /* check in the RNR if the CSA aborted */ 2861 ieee80211_sta_other_link_csa_disappeared(link, 2862 full_elems); 2863 return; 2864 } 2865 } 2866 2867 /* no active CSA nor a new one */ 2868 if (res) { 2869 /* 2870 * However, we may have stopped queues when receiving a public 2871 * action frame that couldn't be protected, if it had the quiet 2872 * bit set. This is a trade-off, we want to be quiet as soon as 2873 * possible, but also don't trust the public action frame much, 2874 * as it can't be protected. 2875 */ 2876 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2877 link->u.mgd.csa.blocked_tx = false; 2878 ieee80211_vif_unblock_queues_csa(sdata); 2879 } 2880 return; 2881 } 2882 2883 /* 2884 * We don't really trust public action frames, but block queues (go to 2885 * quiet mode) for them anyway, we should get a beacon soon to either 2886 * know what the CSA really is, or figure out the public action frame 2887 * was actually an attack. 2888 */ 2889 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2890 if (csa_ie.mode) { 2891 link->u.mgd.csa.blocked_tx = true; 2892 ieee80211_vif_block_queues_csa(sdata); 2893 } 2894 return; 2895 } 2896 2897 if (link->conf->chanreq.oper.chan->band != 2898 csa_ie.chanreq.oper.chan->band) { 2899 link_info(link, 2900 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2901 link->u.mgd.bssid, 2902 csa_ie.chanreq.oper.chan->center_freq, 2903 csa_ie.chanreq.oper.width, 2904 csa_ie.chanreq.oper.center_freq1, 2905 csa_ie.chanreq.oper.center_freq2); 2906 goto drop_connection; 2907 } 2908 2909 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2910 IEEE80211_CHAN_DISABLED)) { 2911 link_info(link, 2912 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2913 link->u.mgd.bssid, 2914 csa_ie.chanreq.oper.chan->center_freq, 2915 csa_ie.chanreq.oper.chan->freq_offset, 2916 csa_ie.chanreq.oper.width, 2917 csa_ie.chanreq.oper.center_freq1, 2918 csa_ie.chanreq.oper.freq1_offset, 2919 csa_ie.chanreq.oper.center_freq2); 2920 goto drop_connection; 2921 } 2922 2923 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2924 &link->conf->chanreq.oper) && 2925 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2926 if (link->u.mgd.csa.ignored_same_chan) 2927 return; 2928 link_info(link, 2929 "AP %pM tries to chanswitch to same channel, ignore\n", 2930 link->u.mgd.bssid); 2931 link->u.mgd.csa.ignored_same_chan = true; 2932 return; 2933 } 2934 2935 /* 2936 * Drop all TDLS peers on the affected link - either we disconnect or 2937 * move to a different channel from this point on. There's no telling 2938 * what our peer will do. 2939 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2940 * have an incompatible wider chandef. 2941 */ 2942 ieee80211_teardown_tdls_peers(link); 2943 2944 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2945 lockdep_is_held(&local->hw.wiphy->mtx)); 2946 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2947 link_info(link, 2948 "no channel context assigned to vif?, disconnecting\n"); 2949 goto drop_connection; 2950 } 2951 2952 if (conf) 2953 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2954 2955 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2956 link_info(link, 2957 "driver doesn't support chan-switch with channel contexts\n"); 2958 goto drop_connection; 2959 } 2960 2961 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2962 link_info(link, 2963 "preparing for channel switch failed, disconnecting\n"); 2964 goto drop_connection; 2965 } 2966 2967 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2968 2969 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2970 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2971 &csa_ie.chanreq.ap); 2972 2973 if (chanctx) { 2974 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2975 chanctx->mode, false); 2976 if (res) { 2977 link_info(link, 2978 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2979 res); 2980 goto drop_connection; 2981 } 2982 } 2983 2984 link->conf->csa_active = true; 2985 link->u.mgd.csa.ignored_same_chan = false; 2986 link->u.mgd.beacon_crc_valid = false; 2987 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2988 2989 if (csa_ie.mode) 2990 ieee80211_vif_block_queues_csa(sdata); 2991 2992 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2993 link->link_id, csa_ie.count, 2994 csa_ie.mode); 2995 2996 /* we may have to handle timeout for deactivated link in software */ 2997 now = ktime_get_boottime(); 2998 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 2999 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 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_hrtimer_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_hrtimer_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_hrtimer_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, 5184 IEEE80211_FTYPE_MGMT | 5185 IEEE80211_STYPE_BEACON, 5186 NULL); 5187 if (!elems) { 5188 rcu_read_unlock(); 5189 ieee80211_set_wmm_default(link, false, false); 5190 continue; 5191 } 5192 5193 ret = _ieee80211_sta_wmm_params(local, link, 5194 elems->wmm_param, 5195 elems->wmm_param_len, 5196 elems->mu_edca_param_set); 5197 5198 kfree(elems); 5199 rcu_read_unlock(); 5200 5201 if (!ret) { 5202 ieee80211_set_wmm_default(link, false, false); 5203 continue; 5204 } 5205 5206 ieee80211_mgd_set_link_qos_params(link); 5207 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5208 } 5209 } 5210 5211 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5212 struct link_sta_info *link_sta, 5213 struct cfg80211_bss *cbss, 5214 struct ieee80211_mgmt *mgmt, 5215 const u8 *elem_start, 5216 unsigned int elem_len, 5217 u64 *changed) 5218 { 5219 struct ieee80211_sub_if_data *sdata = link->sdata; 5220 struct ieee80211_mgd_assoc_data *assoc_data = 5221 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5222 struct ieee80211_bss_conf *bss_conf = link->conf; 5223 struct ieee80211_local *local = sdata->local; 5224 unsigned int link_id = link->link_id; 5225 struct ieee80211_elems_parse_params parse_params = { 5226 .mode = link->u.mgd.conn.mode, 5227 .start = elem_start, 5228 .len = elem_len, 5229 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5230 .from_ap = true, 5231 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5232 }; 5233 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5234 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5235 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5236 const struct cfg80211_bss_ies *bss_ies = NULL; 5237 struct ieee80211_supported_band *sband; 5238 struct ieee802_11_elems *elems; 5239 const __le16 prof_bss_param_ch_present = 5240 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5241 u16 capab_info; 5242 bool ret; 5243 5244 elems = ieee802_11_parse_elems_full(&parse_params); 5245 if (!elems) 5246 return false; 5247 5248 if (link_id == assoc_data->assoc_link_id) { 5249 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5250 5251 /* 5252 * we should not get to this flow unless the association was 5253 * successful, so set the status directly to success 5254 */ 5255 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5256 if (elems->ml_basic) { 5257 int bss_param_ch_cnt = 5258 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5259 5260 if (bss_param_ch_cnt < 0) { 5261 ret = false; 5262 goto out; 5263 } 5264 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5265 bss_conf->bss_param_ch_cnt_link_id = link_id; 5266 } 5267 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5268 !elems->prof || 5269 !(elems->prof->control & prof_bss_param_ch_present)) { 5270 ret = false; 5271 goto out; 5272 } else { 5273 const u8 *ptr = elems->prof->variable + 5274 elems->prof->sta_info_len - 1; 5275 int bss_param_ch_cnt; 5276 5277 /* 5278 * During parsing, we validated that these fields exist, 5279 * otherwise elems->prof would have been set to NULL. 5280 */ 5281 capab_info = get_unaligned_le16(ptr); 5282 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5283 bss_param_ch_cnt = 5284 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5285 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5286 bss_conf->bss_param_ch_cnt_link_id = link_id; 5287 5288 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5289 link_info(link, "association response status code=%u\n", 5290 assoc_data->link[link_id].status); 5291 ret = true; 5292 goto out; 5293 } 5294 } 5295 5296 if (!is_s1g && !elems->supp_rates) { 5297 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5298 ret = false; 5299 goto out; 5300 } 5301 5302 link->u.mgd.tdls_chan_switch_prohibited = 5303 elems->ext_capab && elems->ext_capab_len >= 5 && 5304 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5305 5306 /* 5307 * Some APs are erroneously not including some information in their 5308 * (re)association response frames. Try to recover by using the data 5309 * from the beacon or probe response. This seems to afflict mobile 5310 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5311 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5312 */ 5313 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5314 ((assoc_data->wmm && !elems->wmm_param) || 5315 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5316 (!elems->ht_cap_elem || !elems->ht_operation)) || 5317 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5318 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5319 const struct cfg80211_bss_ies *ies; 5320 struct ieee802_11_elems *bss_elems; 5321 5322 rcu_read_lock(); 5323 ies = rcu_dereference(cbss->ies); 5324 if (ies) 5325 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5326 GFP_ATOMIC); 5327 rcu_read_unlock(); 5328 if (!bss_ies) { 5329 ret = false; 5330 goto out; 5331 } 5332 5333 parse_params.start = bss_ies->data; 5334 parse_params.len = bss_ies->len; 5335 parse_params.bss = cbss; 5336 parse_params.link_id = -1; 5337 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5338 if (!bss_elems) { 5339 ret = false; 5340 goto out; 5341 } 5342 5343 if (assoc_data->wmm && 5344 !elems->wmm_param && bss_elems->wmm_param) { 5345 elems->wmm_param = bss_elems->wmm_param; 5346 sdata_info(sdata, 5347 "AP bug: WMM param missing from AssocResp\n"); 5348 } 5349 5350 /* 5351 * Also check if we requested HT/VHT, otherwise the AP doesn't 5352 * have to include the IEs in the (re)association response. 5353 */ 5354 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5355 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5356 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5357 sdata_info(sdata, 5358 "AP bug: HT capability missing from AssocResp\n"); 5359 } 5360 if (!elems->ht_operation && bss_elems->ht_operation && 5361 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5362 elems->ht_operation = bss_elems->ht_operation; 5363 sdata_info(sdata, 5364 "AP bug: HT operation missing from AssocResp\n"); 5365 } 5366 5367 if (is_5ghz) { 5368 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5369 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5370 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5371 sdata_info(sdata, 5372 "AP bug: VHT capa missing from AssocResp\n"); 5373 } 5374 5375 if (!elems->vht_operation && bss_elems->vht_operation && 5376 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5377 elems->vht_operation = bss_elems->vht_operation; 5378 sdata_info(sdata, 5379 "AP bug: VHT operation missing from AssocResp\n"); 5380 } 5381 } 5382 kfree(bss_elems); 5383 } 5384 5385 /* 5386 * We previously checked these in the beacon/probe response, so 5387 * they should be present here. This is just a safety net. 5388 * Note that the ieee80211_config_bw() below would also check 5389 * for this (and more), but this has better error reporting. 5390 */ 5391 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5392 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5393 sdata_info(sdata, 5394 "HT AP is missing WMM params or HT capability/operation\n"); 5395 ret = false; 5396 goto out; 5397 } 5398 5399 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5400 (!elems->vht_cap_elem || !elems->vht_operation)) { 5401 sdata_info(sdata, 5402 "VHT AP is missing VHT capability/operation\n"); 5403 ret = false; 5404 goto out; 5405 } 5406 5407 /* check/update if AP changed anything in assoc response vs. scan */ 5408 if (ieee80211_config_bw(link, elems, 5409 link_id == assoc_data->assoc_link_id, 5410 changed, 5411 le16_to_cpu(mgmt->frame_control) & 5412 IEEE80211_FCTL_STYPE)) { 5413 ret = false; 5414 goto out; 5415 } 5416 5417 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5418 ret = false; 5419 goto out; 5420 } 5421 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5422 5423 /* Set up internal HT/VHT capabilities */ 5424 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5425 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5426 elems->ht_cap_elem, 5427 link_sta); 5428 5429 if (elems->vht_cap_elem && 5430 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5431 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5432 const struct cfg80211_bss_ies *ies; 5433 5434 /* 5435 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5436 * too large maximum MPDU length in the association response 5437 * (indicating 12k) that it cannot actually process ... 5438 * Work around that. 5439 */ 5440 rcu_read_lock(); 5441 ies = rcu_dereference(cbss->ies); 5442 if (ies) { 5443 const struct element *elem; 5444 5445 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5446 ies->data, ies->len); 5447 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5448 bss_vht_cap = (const void *)elem->data; 5449 } 5450 5451 if (ieee80211_hw_check(&local->hw, STRICT) && 5452 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5453 sizeof(*bss_vht_cap)))) { 5454 rcu_read_unlock(); 5455 ret = false; 5456 link_info(link, "VHT capabilities mismatch\n"); 5457 goto out; 5458 } 5459 5460 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5461 elems->vht_cap_elem, 5462 bss_vht_cap, link_sta); 5463 rcu_read_unlock(); 5464 } 5465 5466 if (elems->he_operation && 5467 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5468 elems->he_cap) { 5469 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5470 elems->he_cap, 5471 elems->he_cap_len, 5472 elems->he_6ghz_capa, 5473 link_sta); 5474 5475 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5476 if (elems->rsnx && elems->rsnx_len && 5477 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5478 wiphy_ext_feature_isset(local->hw.wiphy, 5479 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5480 bss_conf->twt_protected = true; 5481 else 5482 bss_conf->twt_protected = false; 5483 5484 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5485 link_sta, elems); 5486 5487 if (elems->eht_operation && elems->eht_cap && 5488 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5489 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5490 elems->he_cap, 5491 elems->he_cap_len, 5492 elems->eht_cap, 5493 elems->eht_cap_len, 5494 link_sta); 5495 5496 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5497 bss_conf->epcs_support = bss_conf->eht_support && 5498 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5499 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5500 5501 /* EPCS might be already enabled but a new added link 5502 * does not support EPCS. This should not really happen 5503 * in practice. 5504 */ 5505 if (sdata->u.mgd.epcs.enabled && 5506 !bss_conf->epcs_support) 5507 ieee80211_epcs_teardown(sdata); 5508 } else { 5509 bss_conf->eht_support = false; 5510 bss_conf->epcs_support = false; 5511 } 5512 } else { 5513 bss_conf->he_support = false; 5514 bss_conf->twt_requester = false; 5515 bss_conf->twt_protected = false; 5516 bss_conf->eht_support = false; 5517 bss_conf->epcs_support = false; 5518 } 5519 5520 if (elems->s1g_oper && 5521 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5522 elems->s1g_capab) 5523 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5524 link_sta); 5525 5526 bss_conf->twt_broadcast = 5527 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5528 5529 if (bss_conf->he_support) { 5530 bss_conf->he_bss_color.color = 5531 le32_get_bits(elems->he_operation->he_oper_params, 5532 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5533 bss_conf->he_bss_color.partial = 5534 le32_get_bits(elems->he_operation->he_oper_params, 5535 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5536 bss_conf->he_bss_color.enabled = 5537 !le32_get_bits(elems->he_operation->he_oper_params, 5538 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5539 5540 if (bss_conf->he_bss_color.enabled) 5541 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5542 5543 bss_conf->htc_trig_based_pkt_ext = 5544 le32_get_bits(elems->he_operation->he_oper_params, 5545 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5546 bss_conf->frame_time_rts_th = 5547 le32_get_bits(elems->he_operation->he_oper_params, 5548 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5549 5550 bss_conf->uora_exists = !!elems->uora_element; 5551 if (elems->uora_element) 5552 bss_conf->uora_ocw_range = elems->uora_element[0]; 5553 5554 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5555 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5556 /* TODO: OPEN: what happens if BSS color disable is set? */ 5557 } 5558 5559 if (cbss->transmitted_bss) { 5560 bss_conf->nontransmitted = true; 5561 ether_addr_copy(bss_conf->transmitter_bssid, 5562 cbss->transmitted_bss->bssid); 5563 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5564 bss_conf->bssid_index = cbss->bssid_index; 5565 } 5566 5567 /* 5568 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5569 * in their association response, so ignore that data for our own 5570 * configuration. If it changed since the last beacon, we'll get the 5571 * next beacon and update then. 5572 */ 5573 5574 /* 5575 * If an operating mode notification IE is present, override the 5576 * NSS calculation (that would be done in rate_control_rate_init()) 5577 * and use the # of streams from that element. 5578 */ 5579 if (elems->opmode_notif && 5580 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5581 u8 nss; 5582 5583 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5584 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5585 nss += 1; 5586 link_sta->pub->rx_nss = nss; 5587 } 5588 5589 /* 5590 * Always handle WMM once after association regardless 5591 * of the first value the AP uses. Setting -1 here has 5592 * that effect because the AP values is an unsigned 5593 * 4-bit value. 5594 */ 5595 link->u.mgd.wmm_last_param_set = -1; 5596 link->u.mgd.mu_edca_last_param_set = -1; 5597 5598 if (link->u.mgd.disable_wmm_tracking) { 5599 ieee80211_set_wmm_default(link, false, false); 5600 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5601 elems->wmm_param_len, 5602 elems->mu_edca_param_set)) { 5603 /* still enable QoS since we might have HT/VHT */ 5604 ieee80211_set_wmm_default(link, false, true); 5605 /* disable WMM tracking in this case to disable 5606 * tracking WMM parameter changes in the beacon if 5607 * the parameters weren't actually valid. Doing so 5608 * avoids changing parameters very strangely when 5609 * the AP is going back and forth between valid and 5610 * invalid parameters. 5611 */ 5612 link->u.mgd.disable_wmm_tracking = true; 5613 } 5614 5615 if (elems->max_idle_period_ie) { 5616 bss_conf->max_idle_period = 5617 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5618 bss_conf->protected_keep_alive = 5619 !!(elems->max_idle_period_ie->idle_options & 5620 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5621 *changed |= BSS_CHANGED_KEEP_ALIVE; 5622 } else { 5623 bss_conf->max_idle_period = 0; 5624 bss_conf->protected_keep_alive = false; 5625 } 5626 5627 /* set assoc capability (AID was already set earlier), 5628 * ieee80211_set_associated() will tell the driver */ 5629 bss_conf->assoc_capability = capab_info; 5630 5631 ret = true; 5632 out: 5633 kfree(elems); 5634 kfree(bss_ies); 5635 return ret; 5636 } 5637 5638 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5639 struct sta_info *sta, 5640 struct link_sta_info *link_sta, 5641 struct cfg80211_bss *cbss) 5642 { 5643 struct ieee80211_sub_if_data *sdata = link->sdata; 5644 struct ieee80211_local *local = sdata->local; 5645 struct ieee80211_bss *bss = (void *)cbss->priv; 5646 u32 rates = 0, basic_rates = 0; 5647 bool have_higher_than_11mbit = false; 5648 int min_rate = INT_MAX, min_rate_index = -1; 5649 struct ieee80211_supported_band *sband; 5650 5651 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5652 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5653 5654 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5655 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5656 ieee80211_s1g_sta_rate_init(sta); 5657 return 0; 5658 } 5659 5660 sband = local->hw.wiphy->bands[cbss->channel->band]; 5661 5662 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5663 NULL, 0, 5664 &rates, &basic_rates, NULL, 5665 &have_higher_than_11mbit, 5666 &min_rate, &min_rate_index); 5667 5668 /* 5669 * This used to be a workaround for basic rates missing 5670 * in the association response frame. Now that we no 5671 * longer use the basic rates from there, it probably 5672 * doesn't happen any more, but keep the workaround so 5673 * in case some *other* APs are buggy in different ways 5674 * we can connect -- with a warning. 5675 * Allow this workaround only in case the AP provided at least 5676 * one rate. 5677 */ 5678 if (min_rate_index < 0) { 5679 link_info(link, "No legacy rates in association response\n"); 5680 return -EINVAL; 5681 } else if (!basic_rates) { 5682 link_info(link, "No basic rates, using min rate instead\n"); 5683 basic_rates = BIT(min_rate_index); 5684 } 5685 5686 if (rates) 5687 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5688 else 5689 link_info(link, "No rates found, keeping mandatory only\n"); 5690 5691 link->conf->basic_rates = basic_rates; 5692 5693 /* cf. IEEE 802.11 9.2.12 */ 5694 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5695 have_higher_than_11mbit; 5696 5697 return 0; 5698 } 5699 5700 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5701 struct cfg80211_bss *cbss) 5702 { 5703 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5704 const struct element *ht_cap_elem, *vht_cap_elem; 5705 const struct cfg80211_bss_ies *ies; 5706 const struct ieee80211_ht_cap *ht_cap; 5707 const struct ieee80211_vht_cap *vht_cap; 5708 const struct ieee80211_he_cap_elem *he_cap; 5709 const struct element *he_cap_elem; 5710 u16 mcs_80_map, mcs_160_map; 5711 int i, mcs_nss_size; 5712 bool support_160; 5713 u8 chains = 1; 5714 5715 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5716 return chains; 5717 5718 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5719 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5720 ht_cap = (void *)ht_cap_elem->data; 5721 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5722 /* 5723 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5724 * "Tx Unequal Modulation Supported" fields. 5725 */ 5726 } 5727 5728 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5729 return chains; 5730 5731 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5732 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5733 u8 nss; 5734 u16 tx_mcs_map; 5735 5736 vht_cap = (void *)vht_cap_elem->data; 5737 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5738 for (nss = 8; nss > 0; nss--) { 5739 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5740 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5741 break; 5742 } 5743 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5744 chains = max(chains, nss); 5745 } 5746 5747 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5748 return chains; 5749 5750 ies = rcu_dereference(cbss->ies); 5751 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5752 ies->data, ies->len); 5753 5754 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5755 return chains; 5756 5757 /* skip one byte ext_tag_id */ 5758 he_cap = (void *)(he_cap_elem->data + 1); 5759 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5760 5761 /* invalid HE IE */ 5762 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5763 return chains; 5764 5765 /* mcs_nss is right after he_cap info */ 5766 he_mcs_nss_supp = (void *)(he_cap + 1); 5767 5768 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5769 5770 for (i = 7; i >= 0; i--) { 5771 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5772 5773 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5774 chains = max_t(u8, chains, i + 1); 5775 break; 5776 } 5777 } 5778 5779 support_160 = he_cap->phy_cap_info[0] & 5780 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5781 5782 if (!support_160) 5783 return chains; 5784 5785 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5786 for (i = 7; i >= 0; i--) { 5787 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5788 5789 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5790 chains = max_t(u8, chains, i + 1); 5791 break; 5792 } 5793 } 5794 5795 return chains; 5796 } 5797 5798 static void 5799 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5800 struct ieee80211_supported_band *sband, 5801 struct cfg80211_assoc_request *req, 5802 bool wmm_used, int link_id, 5803 struct ieee80211_conn_settings *conn) 5804 { 5805 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5806 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5807 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5808 const struct ieee80211_sta_he_cap *he_cap; 5809 const struct ieee80211_sta_eht_cap *eht_cap; 5810 struct ieee80211_sta_vht_cap vht_cap; 5811 5812 if (sband->band == NL80211_BAND_S1GHZ) { 5813 conn->mode = IEEE80211_CONN_MODE_S1G; 5814 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5815 mlme_dbg(sdata, "operating as S1G STA\n"); 5816 return; 5817 } 5818 5819 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5820 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5821 5822 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5823 5824 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5825 mlme_link_id_dbg(sdata, link_id, 5826 "HT disabled by flag, limiting to legacy\n"); 5827 goto out; 5828 } 5829 5830 if (!wmm_used) { 5831 mlme_link_id_dbg(sdata, link_id, 5832 "WMM/QoS not supported, limiting to legacy\n"); 5833 goto out; 5834 } 5835 5836 if (req) { 5837 unsigned int i; 5838 5839 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5840 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5841 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5842 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5843 netdev_info(sdata->dev, 5844 "WEP/TKIP use, limiting to legacy\n"); 5845 goto out; 5846 } 5847 } 5848 } 5849 5850 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5851 mlme_link_id_dbg(sdata, link_id, 5852 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5853 goto out; 5854 } 5855 5856 /* HT is fine */ 5857 conn->mode = IEEE80211_CONN_MODE_HT; 5858 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5859 IEEE80211_CONN_BW_LIMIT_40 : 5860 IEEE80211_CONN_BW_LIMIT_20; 5861 5862 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5863 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5864 5865 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5866 mlme_link_id_dbg(sdata, link_id, 5867 "VHT disabled by flag, limiting to HT\n"); 5868 goto out; 5869 } 5870 5871 if (vht_cap.vht_supported && is_5ghz) { 5872 bool have_80mhz = false; 5873 unsigned int i; 5874 5875 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5876 mlme_link_id_dbg(sdata, link_id, 5877 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5878 goto out; 5879 } 5880 5881 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5882 for (i = 0; i < sband->n_channels; i++) { 5883 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5884 IEEE80211_CHAN_NO_80MHZ)) 5885 continue; 5886 5887 have_80mhz = true; 5888 break; 5889 } 5890 5891 if (!have_80mhz) { 5892 mlme_link_id_dbg(sdata, link_id, 5893 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5894 goto out; 5895 } 5896 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5897 mlme_link_id_dbg(sdata, link_id, 5898 "no VHT support on 5 GHz, limiting to HT\n"); 5899 goto out; 5900 } 5901 5902 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5903 if (sband->band != NL80211_BAND_2GHZ) { 5904 conn->mode = IEEE80211_CONN_MODE_VHT; 5905 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5906 } 5907 5908 if (is_5ghz && 5909 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5910 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5911 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5912 mlme_link_id_dbg(sdata, link_id, 5913 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5914 } 5915 5916 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5917 mlme_link_id_dbg(sdata, link_id, 5918 "HE disabled by flag, limiting to HT/VHT\n"); 5919 goto out; 5920 } 5921 5922 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5923 if (!he_cap) { 5924 WARN_ON(is_6ghz); 5925 mlme_link_id_dbg(sdata, link_id, 5926 "no HE support, limiting to HT/VHT\n"); 5927 goto out; 5928 } 5929 5930 /* so we have HE */ 5931 conn->mode = IEEE80211_CONN_MODE_HE; 5932 5933 /* check bandwidth */ 5934 switch (sband->band) { 5935 default: 5936 case NL80211_BAND_2GHZ: 5937 if (he_cap->he_cap_elem.phy_cap_info[0] & 5938 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5939 break; 5940 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5941 mlme_link_id_dbg(sdata, link_id, 5942 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5943 break; 5944 case NL80211_BAND_5GHZ: 5945 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5946 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5947 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5948 mlme_link_id_dbg(sdata, link_id, 5949 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5950 break; 5951 } 5952 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5953 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5954 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5955 conn->bw_limit, 5956 IEEE80211_CONN_BW_LIMIT_80); 5957 mlme_link_id_dbg(sdata, link_id, 5958 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5959 } 5960 break; 5961 case NL80211_BAND_6GHZ: 5962 if (he_cap->he_cap_elem.phy_cap_info[0] & 5963 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5964 break; 5965 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5966 conn->bw_limit, 5967 IEEE80211_CONN_BW_LIMIT_80); 5968 mlme_link_id_dbg(sdata, link_id, 5969 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5970 break; 5971 } 5972 5973 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5974 mlme_link_id_dbg(sdata, link_id, 5975 "EHT disabled by flag, limiting to HE\n"); 5976 goto out; 5977 } 5978 5979 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5980 if (!eht_cap) { 5981 mlme_link_id_dbg(sdata, link_id, 5982 "no EHT support, limiting to HE\n"); 5983 goto out; 5984 } 5985 5986 /* we have EHT */ 5987 5988 conn->mode = IEEE80211_CONN_MODE_EHT; 5989 5990 /* check bandwidth */ 5991 if (is_6ghz && 5992 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5993 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5994 else if (is_6ghz) 5995 mlme_link_id_dbg(sdata, link_id, 5996 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5997 5998 out: 5999 mlme_link_id_dbg(sdata, link_id, 6000 "determined local STA to be %s, BW limited to %d MHz\n", 6001 ieee80211_conn_mode_str(conn->mode), 6002 20 * (1 << conn->bw_limit)); 6003 } 6004 6005 static void 6006 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6007 struct ieee80211_supported_band *sband, 6008 struct cfg80211_auth_request *req, 6009 bool wmm_used, 6010 struct ieee80211_conn_settings *conn) 6011 { 6012 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6013 req->link_id > 0 ? req->link_id : 0, 6014 conn); 6015 } 6016 6017 static void 6018 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6019 struct ieee80211_supported_band *sband, 6020 struct cfg80211_assoc_request *req, 6021 bool wmm_used, int link_id, 6022 struct ieee80211_conn_settings *conn) 6023 { 6024 struct ieee80211_conn_settings tmp; 6025 6026 WARN_ON(!req); 6027 6028 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6029 &tmp); 6030 6031 conn->mode = min_t(enum ieee80211_conn_mode, 6032 conn->mode, tmp.mode); 6033 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6034 conn->bw_limit, tmp.bw_limit); 6035 } 6036 6037 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6038 struct ieee80211_link_data *link, 6039 int link_id, 6040 struct cfg80211_bss *cbss, bool mlo, 6041 struct ieee80211_conn_settings *conn, 6042 unsigned long *userspace_selectors) 6043 { 6044 struct ieee80211_local *local = sdata->local; 6045 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6046 struct ieee80211_chan_req chanreq = {}; 6047 struct cfg80211_chan_def ap_chandef; 6048 struct ieee802_11_elems *elems; 6049 int ret; 6050 6051 lockdep_assert_wiphy(local->hw.wiphy); 6052 6053 rcu_read_lock(); 6054 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6055 &chanreq, &ap_chandef, 6056 userspace_selectors); 6057 6058 if (IS_ERR(elems)) { 6059 rcu_read_unlock(); 6060 return PTR_ERR(elems); 6061 } 6062 6063 if (mlo && !elems->ml_basic) { 6064 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6065 rcu_read_unlock(); 6066 kfree(elems); 6067 return -EINVAL; 6068 } 6069 6070 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6071 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6072 6073 if (elems->pwr_constr_elem) 6074 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6075 6076 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6077 if (he_6ghz_oper) 6078 link->conf->power_type = 6079 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6080 cbss->channel->flags); 6081 else 6082 link_info(link, 6083 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6084 cbss->channel->center_freq); 6085 6086 link->conf->tpe = elems->tpe; 6087 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6088 &chanreq.oper); 6089 } 6090 rcu_read_unlock(); 6091 /* the element data was RCU protected so no longer valid anyway */ 6092 kfree(elems); 6093 elems = NULL; 6094 6095 if (!link) 6096 return 0; 6097 6098 rcu_read_lock(); 6099 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6100 local->rx_chains); 6101 rcu_read_unlock(); 6102 6103 /* 6104 * If this fails (possibly due to channel context sharing 6105 * on incompatible channels, e.g. 80+80 and 160 sharing the 6106 * same control channel) try to use a smaller bandwidth. 6107 */ 6108 ret = ieee80211_link_use_channel(link, &chanreq, 6109 IEEE80211_CHANCTX_SHARED); 6110 6111 /* don't downgrade for 5/10/S1G MHz channels, though. */ 6112 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6113 chanreq.oper.width == NL80211_CHAN_WIDTH_10 || 6114 cfg80211_chandef_is_s1g(&chanreq.oper)) 6115 return ret; 6116 6117 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6118 ieee80211_chanreq_downgrade(&chanreq, conn); 6119 6120 ret = ieee80211_link_use_channel(link, &chanreq, 6121 IEEE80211_CHANCTX_SHARED); 6122 } 6123 6124 return ret; 6125 } 6126 6127 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6128 u8 *dtim_count, u8 *dtim_period) 6129 { 6130 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6131 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6132 ies->len); 6133 const struct ieee80211_tim_ie *tim = NULL; 6134 const struct ieee80211_bssid_index *idx; 6135 bool valid = tim_ie && tim_ie[1] >= 2; 6136 6137 if (valid) 6138 tim = (void *)(tim_ie + 2); 6139 6140 if (dtim_count) 6141 *dtim_count = valid ? tim->dtim_count : 0; 6142 6143 if (dtim_period) 6144 *dtim_period = valid ? tim->dtim_period : 0; 6145 6146 /* Check if value is overridden by non-transmitted profile */ 6147 if (!idx_ie || idx_ie[1] < 3) 6148 return valid; 6149 6150 idx = (void *)(idx_ie + 2); 6151 6152 if (dtim_count) 6153 *dtim_count = idx->dtim_count; 6154 6155 if (dtim_period) 6156 *dtim_period = idx->dtim_period; 6157 6158 return true; 6159 } 6160 6161 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6162 struct ieee80211_mgmt *mgmt, 6163 struct ieee802_11_elems *elems, 6164 const u8 *elem_start, unsigned int elem_len) 6165 { 6166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6167 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6168 struct ieee80211_local *local = sdata->local; 6169 unsigned int link_id; 6170 struct sta_info *sta; 6171 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6172 u16 valid_links = 0, dormant_links = 0; 6173 int err; 6174 6175 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6176 /* 6177 * station info was already allocated and inserted before 6178 * the association and should be available to us 6179 */ 6180 sta = sta_info_get(sdata, assoc_data->ap_addr); 6181 if (WARN_ON(!sta)) 6182 goto out_err; 6183 6184 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6185 6186 if (ieee80211_vif_is_mld(&sdata->vif)) { 6187 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6188 if (!assoc_data->link[link_id].bss) 6189 continue; 6190 6191 valid_links |= BIT(link_id); 6192 if (assoc_data->link[link_id].disabled) 6193 dormant_links |= BIT(link_id); 6194 6195 if (link_id != assoc_data->assoc_link_id) { 6196 err = ieee80211_sta_allocate_link(sta, link_id); 6197 if (err) 6198 goto out_err; 6199 } 6200 } 6201 6202 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6203 } 6204 6205 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6206 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6207 struct ieee80211_link_data *link; 6208 struct link_sta_info *link_sta; 6209 6210 if (!cbss) 6211 continue; 6212 6213 link = sdata_dereference(sdata->link[link_id], sdata); 6214 if (WARN_ON(!link)) 6215 goto out_err; 6216 6217 if (ieee80211_vif_is_mld(&sdata->vif)) 6218 link_info(link, 6219 "local address %pM, AP link address %pM%s\n", 6220 link->conf->addr, 6221 assoc_data->link[link_id].bss->bssid, 6222 link_id == assoc_data->assoc_link_id ? 6223 " (assoc)" : ""); 6224 6225 link_sta = rcu_dereference_protected(sta->link[link_id], 6226 lockdep_is_held(&local->hw.wiphy->mtx)); 6227 if (WARN_ON(!link_sta)) 6228 goto out_err; 6229 6230 if (!link->u.mgd.have_beacon) { 6231 const struct cfg80211_bss_ies *ies; 6232 6233 rcu_read_lock(); 6234 ies = rcu_dereference(cbss->beacon_ies); 6235 if (ies) 6236 link->u.mgd.have_beacon = true; 6237 else 6238 ies = rcu_dereference(cbss->ies); 6239 ieee80211_get_dtim(ies, 6240 &link->conf->sync_dtim_count, 6241 &link->u.mgd.dtim_period); 6242 link->conf->beacon_int = cbss->beacon_interval; 6243 rcu_read_unlock(); 6244 } 6245 6246 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6247 6248 if (link_id != assoc_data->assoc_link_id) { 6249 link->u.mgd.conn = assoc_data->link[link_id].conn; 6250 6251 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6252 true, &link->u.mgd.conn, 6253 sdata->u.mgd.userspace_selectors); 6254 if (err) { 6255 link_info(link, "prep_channel failed\n"); 6256 goto out_err; 6257 } 6258 } 6259 6260 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6261 assoc_data->link[link_id].bss); 6262 if (err) 6263 goto out_err; 6264 6265 if (!ieee80211_assoc_config_link(link, link_sta, 6266 assoc_data->link[link_id].bss, 6267 mgmt, elem_start, elem_len, 6268 &changed[link_id])) 6269 goto out_err; 6270 6271 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6272 valid_links &= ~BIT(link_id); 6273 ieee80211_sta_remove_link(sta, link_id); 6274 continue; 6275 } 6276 6277 if (link_id != assoc_data->assoc_link_id) { 6278 err = ieee80211_sta_activate_link(sta, link_id); 6279 if (err) 6280 goto out_err; 6281 } 6282 } 6283 6284 /* links might have changed due to rejected ones, set them again */ 6285 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6286 6287 rate_control_rate_init_all_links(sta); 6288 6289 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6290 set_sta_flag(sta, WLAN_STA_MFP); 6291 sta->sta.mfp = true; 6292 } else { 6293 sta->sta.mfp = false; 6294 } 6295 6296 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6297 elems->ext_capab_len); 6298 6299 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6300 local->hw.queues >= IEEE80211_NUM_ACS; 6301 6302 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6303 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6304 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6305 if (err) { 6306 sdata_info(sdata, 6307 "failed to move station %pM to desired state\n", 6308 sta->sta.addr); 6309 WARN_ON(__sta_info_destroy(sta)); 6310 goto out_err; 6311 } 6312 6313 if (sdata->wdev.use_4addr) 6314 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6315 6316 ieee80211_set_associated(sdata, assoc_data, changed); 6317 6318 /* 6319 * If we're using 4-addr mode, let the AP know that we're 6320 * doing so, so that it can create the STA VLAN on its side 6321 */ 6322 if (ifmgd->use_4addr) 6323 ieee80211_send_4addr_nullfunc(local, sdata); 6324 6325 /* 6326 * Start timer to probe the connection to the AP now. 6327 * Also start the timer that will detect beacon loss. 6328 */ 6329 ieee80211_sta_reset_beacon_monitor(sdata); 6330 ieee80211_sta_reset_conn_monitor(sdata); 6331 6332 return true; 6333 out_err: 6334 eth_zero_addr(sdata->vif.cfg.ap_addr); 6335 return false; 6336 } 6337 6338 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6339 struct ieee80211_mgmt *mgmt, 6340 size_t len) 6341 { 6342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6343 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6344 u16 capab_info, status_code, aid; 6345 struct ieee80211_elems_parse_params parse_params = { 6346 .bss = NULL, 6347 .link_id = -1, 6348 .from_ap = true, 6349 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 6350 }; 6351 struct ieee802_11_elems *elems; 6352 int ac; 6353 const u8 *elem_start; 6354 unsigned int elem_len; 6355 bool reassoc; 6356 struct ieee80211_event event = { 6357 .type = MLME_EVENT, 6358 .u.mlme.data = ASSOC_EVENT, 6359 }; 6360 struct ieee80211_prep_tx_info info = {}; 6361 struct cfg80211_rx_assoc_resp_data resp = { 6362 .uapsd_queues = -1, 6363 }; 6364 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6365 unsigned int link_id; 6366 u16 max_aid = IEEE80211_MAX_AID; 6367 6368 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6369 6370 if (!assoc_data) 6371 return; 6372 6373 info.link_id = assoc_data->assoc_link_id; 6374 6375 parse_params.mode = 6376 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6377 6378 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6379 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6380 return; 6381 6382 /* 6383 * AssocResp and ReassocResp have identical structure, so process both 6384 * of them in this function. 6385 */ 6386 6387 if (len < 24 + 6) 6388 return; 6389 6390 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6391 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6392 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6393 if (assoc_data->s1g) { 6394 elem_start = mgmt->u.s1g_assoc_resp.variable; 6395 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6396 } else { 6397 elem_start = mgmt->u.assoc_resp.variable; 6398 } 6399 6400 /* 6401 * Note: this may not be perfect, AP might misbehave - if 6402 * anyone needs to rely on perfect complete notification 6403 * with the exact right subtype, then we need to track what 6404 * we actually transmitted. 6405 */ 6406 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6407 IEEE80211_STYPE_ASSOC_REQ; 6408 6409 if (assoc_data->fils_kek_len && 6410 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6411 return; 6412 6413 elem_len = len - (elem_start - (u8 *)mgmt); 6414 parse_params.start = elem_start; 6415 parse_params.len = elem_len; 6416 elems = ieee802_11_parse_elems_full(&parse_params); 6417 if (!elems) 6418 goto notify_driver; 6419 6420 if (elems->aid_resp) 6421 aid = le16_to_cpu(elems->aid_resp->aid); 6422 else 6423 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6424 6425 /* 6426 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6427 * an S1G STA the 3 MSBs are reserved. 6428 * (802.11-2016 9.4.1.8 AID field). 6429 */ 6430 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6431 6432 sdata_info(sdata, 6433 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6434 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6435 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6436 6437 ifmgd->broken_ap = false; 6438 6439 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6440 elems->timeout_int && 6441 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6442 u32 tu, ms; 6443 6444 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6445 le32_to_cpu(elems->timeout_int->value)); 6446 6447 tu = le32_to_cpu(elems->timeout_int->value); 6448 ms = tu * 1024 / 1000; 6449 sdata_info(sdata, 6450 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6451 assoc_data->ap_addr, tu, ms); 6452 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6453 assoc_data->timeout_started = true; 6454 assoc_data->comeback = true; 6455 if (ms > IEEE80211_ASSOC_TIMEOUT) 6456 run_again(sdata, assoc_data->timeout); 6457 goto notify_driver; 6458 } 6459 6460 if (status_code != WLAN_STATUS_SUCCESS) { 6461 sdata_info(sdata, "%pM denied association (code=%d)\n", 6462 assoc_data->ap_addr, status_code); 6463 event.u.mlme.status = MLME_DENIED; 6464 event.u.mlme.reason = status_code; 6465 drv_event_callback(sdata->local, sdata, &event); 6466 } else { 6467 if (aid == 0 || aid > max_aid) { 6468 sdata_info(sdata, 6469 "invalid AID value %d (out of range), turn off PS\n", 6470 aid); 6471 aid = 0; 6472 ifmgd->broken_ap = true; 6473 } 6474 6475 if (ieee80211_vif_is_mld(&sdata->vif)) { 6476 struct ieee80211_mle_basic_common_info *common; 6477 6478 if (!elems->ml_basic) { 6479 sdata_info(sdata, 6480 "MLO association with %pM but no (basic) multi-link element in response!\n", 6481 assoc_data->ap_addr); 6482 goto abandon_assoc; 6483 } 6484 6485 common = (void *)elems->ml_basic->variable; 6486 6487 if (memcmp(assoc_data->ap_addr, 6488 common->mld_mac_addr, ETH_ALEN)) { 6489 sdata_info(sdata, 6490 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6491 common->mld_mac_addr, 6492 assoc_data->ap_addr); 6493 goto abandon_assoc; 6494 } 6495 6496 sdata->vif.cfg.eml_cap = 6497 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6498 sdata->vif.cfg.eml_med_sync_delay = 6499 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6500 sdata->vif.cfg.mld_capa_op = 6501 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6502 } 6503 6504 sdata->vif.cfg.aid = aid; 6505 sdata->vif.cfg.s1g = assoc_data->s1g; 6506 6507 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6508 elem_start, elem_len)) { 6509 /* oops -- internal error -- send timeout for now */ 6510 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6511 goto notify_driver; 6512 } 6513 event.u.mlme.status = MLME_SUCCESS; 6514 drv_event_callback(sdata->local, sdata, &event); 6515 sdata_info(sdata, "associated\n"); 6516 6517 info.success = 1; 6518 } 6519 6520 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6521 struct ieee80211_link_data *link; 6522 6523 if (!assoc_data->link[link_id].bss) 6524 continue; 6525 6526 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6527 ether_addr_copy(resp.links[link_id].addr, 6528 assoc_data->link[link_id].addr); 6529 resp.links[link_id].status = assoc_data->link[link_id].status; 6530 6531 link = sdata_dereference(sdata->link[link_id], sdata); 6532 if (!link) 6533 continue; 6534 6535 /* get uapsd queues configuration - same for all links */ 6536 resp.uapsd_queues = 0; 6537 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6538 if (link->tx_conf[ac].uapsd) 6539 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6540 } 6541 6542 if (ieee80211_vif_is_mld(&sdata->vif)) { 6543 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6544 resp.ap_mld_addr = ap_mld_addr; 6545 } 6546 6547 ieee80211_destroy_assoc_data(sdata, 6548 status_code == WLAN_STATUS_SUCCESS ? 6549 ASSOC_SUCCESS : 6550 ASSOC_REJECTED); 6551 6552 resp.buf = (u8 *)mgmt; 6553 resp.len = len; 6554 resp.req_ies = ifmgd->assoc_req_ies; 6555 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6556 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6557 notify_driver: 6558 drv_mgd_complete_tx(sdata->local, sdata, &info); 6559 kfree(elems); 6560 return; 6561 abandon_assoc: 6562 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6563 goto notify_driver; 6564 } 6565 6566 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6567 struct ieee80211_mgmt *mgmt, size_t len, 6568 struct ieee80211_rx_status *rx_status) 6569 { 6570 struct ieee80211_sub_if_data *sdata = link->sdata; 6571 struct ieee80211_local *local = sdata->local; 6572 struct ieee80211_bss *bss; 6573 struct ieee80211_channel *channel; 6574 6575 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6576 6577 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6578 ieee80211_rx_status_to_khz(rx_status)); 6579 if (!channel) 6580 return; 6581 6582 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6583 if (bss) { 6584 link->conf->beacon_rate = bss->beacon_rate; 6585 ieee80211_rx_bss_put(local, bss); 6586 } 6587 } 6588 6589 6590 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6591 struct sk_buff *skb) 6592 { 6593 struct ieee80211_sub_if_data *sdata = link->sdata; 6594 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6595 struct ieee80211_if_managed *ifmgd; 6596 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6597 struct ieee80211_channel *channel; 6598 size_t baselen, len = skb->len; 6599 6600 ifmgd = &sdata->u.mgd; 6601 6602 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6603 6604 /* 6605 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6606 * "If a 6 GHz AP receives a Probe Request frame and responds with 6607 * a Probe Response frame [..], the Address 1 field of the Probe 6608 * Response frame shall be set to the broadcast address [..]" 6609 * So, on 6GHz band we should also accept broadcast responses. 6610 */ 6611 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 6612 ieee80211_rx_status_to_khz(rx_status)); 6613 if (!channel) 6614 return; 6615 6616 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6617 (channel->band != NL80211_BAND_6GHZ || 6618 !is_broadcast_ether_addr(mgmt->da))) 6619 return; /* ignore ProbeResp to foreign address */ 6620 6621 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6622 if (baselen > len) 6623 return; 6624 6625 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6626 6627 if (ifmgd->associated && 6628 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6629 ieee80211_reset_ap_probe(sdata); 6630 } 6631 6632 /* 6633 * This is the canonical list of information elements we care about, 6634 * the filter code also gives us all changes to the Microsoft OUI 6635 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6636 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6637 * changes to requested client power. 6638 * 6639 * We implement beacon filtering in software since that means we can 6640 * avoid processing the frame here and in cfg80211, and userspace 6641 * will not be able to tell whether the hardware supports it or not. 6642 * 6643 * XXX: This list needs to be dynamic -- userspace needs to be able to 6644 * add items it requires. It also needs to be able to tell us to 6645 * look out for other vendor IEs. 6646 */ 6647 static const u64 care_about_ies = 6648 (1ULL << WLAN_EID_COUNTRY) | 6649 (1ULL << WLAN_EID_ERP_INFO) | 6650 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6651 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6652 (1ULL << WLAN_EID_HT_CAPABILITY) | 6653 (1ULL << WLAN_EID_HT_OPERATION) | 6654 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6655 6656 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6657 struct ieee80211_if_managed *ifmgd, 6658 struct ieee80211_bss_conf *bss_conf, 6659 struct ieee80211_local *local, 6660 struct ieee80211_rx_status *rx_status) 6661 { 6662 struct ieee80211_sub_if_data *sdata = link->sdata; 6663 6664 /* Track average RSSI from the Beacon frames of the current AP */ 6665 6666 if (!link->u.mgd.tracking_signal_avg) { 6667 link->u.mgd.tracking_signal_avg = true; 6668 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6669 link->u.mgd.last_cqm_event_signal = 0; 6670 link->u.mgd.count_beacon_signal = 1; 6671 link->u.mgd.last_ave_beacon_signal = 0; 6672 } else { 6673 link->u.mgd.count_beacon_signal++; 6674 } 6675 6676 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6677 -rx_status->signal); 6678 6679 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6680 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6681 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6682 int last_sig = link->u.mgd.last_ave_beacon_signal; 6683 struct ieee80211_event event = { 6684 .type = RSSI_EVENT, 6685 }; 6686 6687 /* 6688 * if signal crosses either of the boundaries, invoke callback 6689 * with appropriate parameters 6690 */ 6691 if (sig > ifmgd->rssi_max_thold && 6692 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6693 link->u.mgd.last_ave_beacon_signal = sig; 6694 event.u.rssi.data = RSSI_EVENT_HIGH; 6695 drv_event_callback(local, sdata, &event); 6696 } else if (sig < ifmgd->rssi_min_thold && 6697 (last_sig >= ifmgd->rssi_max_thold || 6698 last_sig == 0)) { 6699 link->u.mgd.last_ave_beacon_signal = sig; 6700 event.u.rssi.data = RSSI_EVENT_LOW; 6701 drv_event_callback(local, sdata, &event); 6702 } 6703 } 6704 6705 if (bss_conf->cqm_rssi_thold && 6706 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6707 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6708 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6709 int last_event = link->u.mgd.last_cqm_event_signal; 6710 int thold = bss_conf->cqm_rssi_thold; 6711 int hyst = bss_conf->cqm_rssi_hyst; 6712 6713 if (sig < thold && 6714 (last_event == 0 || sig < last_event - hyst)) { 6715 link->u.mgd.last_cqm_event_signal = sig; 6716 ieee80211_cqm_rssi_notify( 6717 &sdata->vif, 6718 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6719 sig, GFP_KERNEL); 6720 } else if (sig > thold && 6721 (last_event == 0 || sig > last_event + hyst)) { 6722 link->u.mgd.last_cqm_event_signal = sig; 6723 ieee80211_cqm_rssi_notify( 6724 &sdata->vif, 6725 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6726 sig, GFP_KERNEL); 6727 } 6728 } 6729 6730 if (bss_conf->cqm_rssi_low && 6731 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6732 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6733 int last_event = link->u.mgd.last_cqm_event_signal; 6734 int low = bss_conf->cqm_rssi_low; 6735 int high = bss_conf->cqm_rssi_high; 6736 6737 if (sig < low && 6738 (last_event == 0 || last_event >= low)) { 6739 link->u.mgd.last_cqm_event_signal = sig; 6740 ieee80211_cqm_rssi_notify( 6741 &sdata->vif, 6742 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6743 sig, GFP_KERNEL); 6744 } else if (sig > high && 6745 (last_event == 0 || last_event <= high)) { 6746 link->u.mgd.last_cqm_event_signal = sig; 6747 ieee80211_cqm_rssi_notify( 6748 &sdata->vif, 6749 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6750 sig, GFP_KERNEL); 6751 } 6752 } 6753 } 6754 6755 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6756 struct cfg80211_bss *bss) 6757 { 6758 if (ether_addr_equal(tx_bssid, bss->bssid)) 6759 return true; 6760 if (!bss->transmitted_bss) 6761 return false; 6762 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6763 } 6764 6765 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6766 struct wiphy_work *work) 6767 { 6768 struct ieee80211_sub_if_data *sdata = 6769 container_of(work, struct ieee80211_sub_if_data, 6770 u.mgd.ml_reconf_work.work); 6771 u16 new_valid_links, new_active_links, new_dormant_links; 6772 int ret; 6773 6774 if (!sdata->u.mgd.removed_links) 6775 return; 6776 6777 sdata_info(sdata, 6778 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6779 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6780 6781 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6782 if (new_valid_links == sdata->vif.valid_links) 6783 return; 6784 6785 if (!new_valid_links || 6786 !(new_valid_links & ~sdata->vif.dormant_links)) { 6787 sdata_info(sdata, "No valid links after reconfiguration\n"); 6788 ret = -EINVAL; 6789 goto out; 6790 } 6791 6792 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6793 if (new_active_links != sdata->vif.active_links) { 6794 if (!new_active_links) 6795 new_active_links = 6796 BIT(ffs(new_valid_links & 6797 ~sdata->vif.dormant_links) - 1); 6798 6799 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6800 if (ret) { 6801 sdata_info(sdata, 6802 "Failed setting active links\n"); 6803 goto out; 6804 } 6805 } 6806 6807 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6808 6809 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6810 new_dormant_links); 6811 if (ret) 6812 sdata_info(sdata, "Failed setting valid links\n"); 6813 6814 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6815 6816 out: 6817 if (!ret) 6818 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6819 else 6820 __ieee80211_disconnect(sdata); 6821 6822 sdata->u.mgd.removed_links = 0; 6823 } 6824 6825 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6826 struct ieee802_11_elems *elems) 6827 { 6828 const struct element *sub; 6829 unsigned long removed_links = 0; 6830 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6831 u8 link_id; 6832 u32 delay; 6833 6834 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6835 return; 6836 6837 /* Directly parse the sub elements as the common information doesn't 6838 * hold any useful information. 6839 */ 6840 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6841 elems->ml_reconf_len) { 6842 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6843 u8 *pos = prof->variable; 6844 u16 control; 6845 6846 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6847 continue; 6848 6849 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6850 sub->datalen)) 6851 return; 6852 6853 control = le16_to_cpu(prof->control); 6854 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6855 6856 removed_links |= BIT(link_id); 6857 6858 /* the MAC address should not be included, but handle it */ 6859 if (control & 6860 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6861 pos += 6; 6862 6863 /* According to Draft P802.11be_D3.0, the control should 6864 * include the AP Removal Timer present. If the AP Removal Timer 6865 * is not present assume immediate removal. 6866 */ 6867 if (control & 6868 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6869 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6870 } 6871 6872 removed_links &= sdata->vif.valid_links; 6873 if (!removed_links) { 6874 /* In case the removal was cancelled, abort it */ 6875 if (sdata->u.mgd.removed_links) { 6876 sdata->u.mgd.removed_links = 0; 6877 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 6878 &sdata->u.mgd.ml_reconf_work); 6879 } 6880 return; 6881 } 6882 6883 delay = 0; 6884 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6885 struct ieee80211_bss_conf *link_conf = 6886 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6887 u32 link_delay; 6888 6889 if (!link_conf) { 6890 removed_links &= ~BIT(link_id); 6891 continue; 6892 } 6893 6894 if (link_removal_timeout[link_id] < 1) 6895 link_delay = 0; 6896 else 6897 link_delay = link_conf->beacon_int * 6898 (link_removal_timeout[link_id] - 1); 6899 6900 if (!delay) 6901 delay = link_delay; 6902 else 6903 delay = min(delay, link_delay); 6904 } 6905 6906 sdata->u.mgd.removed_links = removed_links; 6907 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 6908 &sdata->u.mgd.ml_reconf_work, 6909 us_to_ktime(ieee80211_tu_to_usec(delay))); 6910 } 6911 6912 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6913 u16 active_links, u16 dormant_links, 6914 u16 suspended_links) 6915 { 6916 u64 changed = 0; 6917 int ret; 6918 6919 if (!active_links) { 6920 ret = -EINVAL; 6921 goto out; 6922 } 6923 6924 /* If there is an active negotiated TTLM, it should be discarded by 6925 * the new negotiated/advertised TTLM. 6926 */ 6927 if (sdata->vif.neg_ttlm.valid) { 6928 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6929 sdata->vif.suspended_links = 0; 6930 changed = BSS_CHANGED_MLD_TTLM; 6931 } 6932 6933 if (sdata->vif.active_links != active_links) { 6934 /* usable links are affected when active_links are changed, 6935 * so notify the driver about the status change 6936 */ 6937 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6938 active_links &= sdata->vif.active_links; 6939 if (!active_links) 6940 active_links = 6941 BIT(__ffs(sdata->vif.valid_links & 6942 ~dormant_links)); 6943 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6944 if (ret) { 6945 sdata_info(sdata, "Failed to set TTLM active links\n"); 6946 goto out; 6947 } 6948 } 6949 6950 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6951 dormant_links); 6952 if (ret) { 6953 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6954 goto out; 6955 } 6956 6957 sdata->vif.suspended_links = suspended_links; 6958 if (sdata->vif.suspended_links) 6959 changed |= BSS_CHANGED_MLD_TTLM; 6960 6961 ieee80211_vif_cfg_change_notify(sdata, changed); 6962 6963 out: 6964 if (ret) 6965 ieee80211_disconnect(&sdata->vif, false); 6966 6967 return ret; 6968 } 6969 6970 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6971 struct wiphy_work *work) 6972 { 6973 u16 new_active_links, new_dormant_links; 6974 struct ieee80211_sub_if_data *sdata = 6975 container_of(work, struct ieee80211_sub_if_data, 6976 u.mgd.ttlm_work.work); 6977 6978 new_active_links = sdata->u.mgd.ttlm_info.map & 6979 sdata->vif.valid_links; 6980 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6981 sdata->vif.valid_links; 6982 6983 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6984 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6985 0)) 6986 return; 6987 6988 sdata->u.mgd.ttlm_info.active = true; 6989 sdata->u.mgd.ttlm_info.switch_time = 0; 6990 } 6991 6992 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6993 { 6994 if (bm_size == 1) 6995 return *data; 6996 else 6997 return get_unaligned_le16(data); 6998 } 6999 7000 static int 7001 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 7002 const struct ieee80211_ttlm_elem *ttlm, 7003 struct ieee80211_adv_ttlm_info *ttlm_info) 7004 { 7005 /* The element size was already validated in 7006 * ieee80211_tid_to_link_map_size_ok() 7007 */ 7008 u8 control, link_map_presence, map_size, tid; 7009 u8 *pos; 7010 7011 memset(ttlm_info, 0, sizeof(*ttlm_info)); 7012 pos = (void *)ttlm->optional; 7013 control = ttlm->control; 7014 7015 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 7016 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 7017 return 0; 7018 7019 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 7020 IEEE80211_TTLM_DIRECTION_BOTH) { 7021 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 7022 return -EINVAL; 7023 } 7024 7025 link_map_presence = *pos; 7026 pos++; 7027 7028 ttlm_info->switch_time = get_unaligned_le16(pos); 7029 7030 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 7031 * by 1. 7032 */ 7033 if (!ttlm_info->switch_time) 7034 ttlm_info->switch_time = 1; 7035 7036 pos += 2; 7037 7038 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 7039 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 7040 pos += 3; 7041 } 7042 7043 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7044 map_size = 1; 7045 else 7046 map_size = 2; 7047 7048 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 7049 * not advertise a TID-to-link mapping that does not map all TIDs to the 7050 * same link set, reject frame if not all links have mapping 7051 */ 7052 if (link_map_presence != 0xff) { 7053 sdata_info(sdata, 7054 "Invalid advertised T2L mapping presence indicator\n"); 7055 return -EINVAL; 7056 } 7057 7058 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7059 if (!ttlm_info->map) { 7060 sdata_info(sdata, 7061 "Invalid advertised T2L map for TID 0\n"); 7062 return -EINVAL; 7063 } 7064 7065 pos += map_size; 7066 7067 for (tid = 1; tid < 8; tid++) { 7068 u16 map = ieee80211_get_ttlm(map_size, pos); 7069 7070 if (map != ttlm_info->map) { 7071 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7072 tid); 7073 return -EINVAL; 7074 } 7075 7076 pos += map_size; 7077 } 7078 return 0; 7079 } 7080 7081 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7082 struct ieee802_11_elems *elems, 7083 u64 beacon_ts) 7084 { 7085 u8 i; 7086 int ret; 7087 7088 if (!ieee80211_vif_is_mld(&sdata->vif)) 7089 return; 7090 7091 if (!elems->ttlm_num) { 7092 if (sdata->u.mgd.ttlm_info.switch_time) { 7093 /* if a planned TID-to-link mapping was cancelled - 7094 * abort it 7095 */ 7096 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7097 &sdata->u.mgd.ttlm_work); 7098 } else if (sdata->u.mgd.ttlm_info.active) { 7099 /* if no TID-to-link element, set to default mapping in 7100 * which all TIDs are mapped to all setup links 7101 */ 7102 ret = ieee80211_vif_set_links(sdata, 7103 sdata->vif.valid_links, 7104 0); 7105 if (ret) { 7106 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7107 return; 7108 } 7109 ieee80211_vif_cfg_change_notify(sdata, 7110 BSS_CHANGED_MLD_VALID_LINKS); 7111 } 7112 memset(&sdata->u.mgd.ttlm_info, 0, 7113 sizeof(sdata->u.mgd.ttlm_info)); 7114 return; 7115 } 7116 7117 for (i = 0; i < elems->ttlm_num; i++) { 7118 struct ieee80211_adv_ttlm_info ttlm_info; 7119 u32 res; 7120 7121 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7122 &ttlm_info); 7123 7124 if (res) { 7125 __ieee80211_disconnect(sdata); 7126 return; 7127 } 7128 7129 if (ttlm_info.switch_time) { 7130 u16 beacon_ts_tu, st_tu, delay; 7131 u64 delay_usec; 7132 u64 mask; 7133 7134 /* The t2l map switch time is indicated with a partial 7135 * TSF value (bits 10 to 25), get the partial beacon TS 7136 * as well, and calc the delay to the start time. 7137 */ 7138 mask = GENMASK_ULL(25, 10); 7139 beacon_ts_tu = (beacon_ts & mask) >> 10; 7140 st_tu = ttlm_info.switch_time; 7141 delay = st_tu - beacon_ts_tu; 7142 7143 /* 7144 * If the switch time is far in the future, then it 7145 * could also be the previous switch still being 7146 * announced. 7147 * We can simply ignore it for now, if it is a future 7148 * switch the AP will continue to announce it anyway. 7149 */ 7150 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7151 return; 7152 7153 delay_usec = ieee80211_tu_to_usec(delay); 7154 7155 /* Link switching can take time, so schedule it 7156 * 100ms before to be ready on time 7157 */ 7158 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7159 delay_usec -= 7160 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7161 else 7162 delay_usec = 0; 7163 7164 sdata->u.mgd.ttlm_info = ttlm_info; 7165 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7166 &sdata->u.mgd.ttlm_work); 7167 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7168 &sdata->u.mgd.ttlm_work, 7169 us_to_ktime(delay_usec)); 7170 return; 7171 } 7172 } 7173 } 7174 7175 static void 7176 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7177 int reporting_link_id, 7178 struct ieee802_11_elems *elems) 7179 { 7180 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7181 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7182 const struct element *sub; 7183 const u8 *subelems; 7184 size_t subelems_len; 7185 u8 common_size; 7186 int link_id; 7187 7188 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7189 return; 7190 7191 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7192 subelems = (u8 *)elems->ml_basic + common_size; 7193 subelems_len = elems->ml_basic_len - common_size; 7194 7195 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7196 subelems, subelems_len) { 7197 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7198 struct ieee80211_link_data *link; 7199 ssize_t len; 7200 7201 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7202 sub->datalen)) 7203 continue; 7204 7205 link_id = le16_get_bits(prof->control, 7206 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7207 /* need a valid link ID, but also not our own, both AP bugs */ 7208 if (link_id == reporting_link_id || 7209 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7210 continue; 7211 7212 link = sdata_dereference(sdata->link[link_id], sdata); 7213 if (!link) 7214 continue; 7215 7216 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7217 NULL, 0, 7218 IEEE80211_MLE_SUBELEM_FRAGMENT); 7219 if (WARN_ON(len < 0)) 7220 continue; 7221 7222 sta_profiles[link_id] = sub; 7223 sta_profiles_len[link_id] = len; 7224 } 7225 7226 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7227 struct ieee80211_mle_per_sta_profile *prof; 7228 struct ieee802_11_elems *prof_elems; 7229 struct ieee80211_link_data *link; 7230 ssize_t len; 7231 7232 if (link_id == reporting_link_id) 7233 continue; 7234 7235 link = sdata_dereference(sdata->link[link_id], sdata); 7236 if (!link) 7237 continue; 7238 7239 if (!sta_profiles[link_id]) { 7240 prof_elems = NULL; 7241 goto handle; 7242 } 7243 7244 /* we can defragment in-place, won't use the buffer again */ 7245 len = cfg80211_defragment_element(sta_profiles[link_id], 7246 subelems, subelems_len, 7247 (void *)sta_profiles[link_id], 7248 sta_profiles_len[link_id], 7249 IEEE80211_MLE_SUBELEM_FRAGMENT); 7250 if (WARN_ON(len != sta_profiles_len[link_id])) 7251 continue; 7252 7253 prof = (void *)sta_profiles[link_id]; 7254 prof_elems = ieee802_11_parse_elems(prof->variable + 7255 (prof->sta_info_len - 1), 7256 len - 7257 (prof->sta_info_len - 1), 7258 IEEE80211_FTYPE_MGMT | 7259 IEEE80211_STYPE_BEACON, 7260 NULL); 7261 7262 /* memory allocation failed - let's hope that's transient */ 7263 if (!prof_elems) 7264 continue; 7265 7266 handle: 7267 /* 7268 * FIXME: the timings here are obviously incorrect, 7269 * but only older Intel drivers seem to care, and 7270 * those don't have MLO. If you really need this, 7271 * the problem is having to calculate it with the 7272 * TSF offset etc. The device_timestamp is still 7273 * correct, of course. 7274 */ 7275 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7276 IEEE80211_CSA_SOURCE_OTHER_LINK); 7277 kfree(prof_elems); 7278 } 7279 } 7280 7281 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7282 const struct ieee802_11_elems *elems) 7283 { 7284 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7285 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7286 7287 if (!elems->ssid) 7288 return false; 7289 7290 /* hidden SSID: zero length */ 7291 if (elems->ssid_len == 0) 7292 return false; 7293 7294 if (elems->ssid_len != cfg->ssid_len) 7295 return true; 7296 7297 /* hidden SSID: zeroed out */ 7298 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7299 return false; 7300 7301 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7302 } 7303 7304 static bool 7305 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7306 struct ieee80211_mgmt *mgmt, 7307 struct ieee80211_rx_status *rx_status, 7308 struct ieee80211_chanctx_conf *chanctx) 7309 { 7310 u32 pri_2mhz_khz; 7311 struct ieee80211_channel *s1g_sibling_1mhz; 7312 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7313 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7314 7315 if (rx_khz == pri_khz) 7316 return true; 7317 7318 if (!chanctx->def.s1g_primary_2mhz) 7319 return false; 7320 7321 /* 7322 * If we have an S1G interface with a 2MHz primary, beacons are 7323 * sent on the center frequency of the 2MHz primary. Find the sibling 7324 * 1MHz channel and calculate the 2MHz primary center frequency. 7325 */ 7326 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7327 &chanctx->def); 7328 if (!s1g_sibling_1mhz) 7329 return false; 7330 7331 pri_2mhz_khz = 7332 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7333 return rx_khz == pri_2mhz_khz; 7334 } 7335 7336 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7337 struct ieee80211_hdr *hdr, size_t len, 7338 struct ieee80211_rx_status *rx_status) 7339 { 7340 struct ieee80211_sub_if_data *sdata = link->sdata; 7341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7342 struct ieee80211_bss_conf *bss_conf = link->conf; 7343 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7344 struct ieee80211_mgmt *mgmt = (void *) hdr; 7345 struct ieee80211_ext *ext = NULL; 7346 size_t baselen; 7347 struct ieee802_11_elems *elems; 7348 struct ieee80211_local *local = sdata->local; 7349 struct ieee80211_chanctx_conf *chanctx_conf; 7350 struct ieee80211_supported_band *sband; 7351 struct ieee80211_channel *chan; 7352 struct link_sta_info *link_sta; 7353 struct sta_info *sta; 7354 u64 changed = 0; 7355 bool erp_valid; 7356 u8 erp_value = 0; 7357 u32 ncrc = 0; 7358 u8 *bssid, *variable = mgmt->u.beacon.variable; 7359 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7360 struct ieee80211_elems_parse_params parse_params = { 7361 .mode = link->u.mgd.conn.mode, 7362 .link_id = -1, 7363 .from_ap = true, 7364 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7365 }; 7366 7367 lockdep_assert_wiphy(local->hw.wiphy); 7368 7369 /* Process beacon from the current BSS */ 7370 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7371 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7372 ext = (void *)mgmt; 7373 variable = ext->u.s1g_beacon.variable + 7374 ieee80211_s1g_optional_len(ext->frame_control); 7375 } 7376 7377 baselen = (u8 *) variable - (u8 *) mgmt; 7378 if (baselen > len) 7379 return; 7380 7381 parse_params.start = variable; 7382 parse_params.len = len - baselen; 7383 7384 rcu_read_lock(); 7385 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7386 if (!chanctx_conf) { 7387 rcu_read_unlock(); 7388 return; 7389 } 7390 7391 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7392 chanctx_conf)) { 7393 rcu_read_unlock(); 7394 return; 7395 } 7396 chan = chanctx_conf->def.chan; 7397 rcu_read_unlock(); 7398 7399 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7400 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7401 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7402 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7403 elems = ieee802_11_parse_elems_full(&parse_params); 7404 if (!elems) 7405 return; 7406 7407 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7408 7409 if (elems->dtim_period) 7410 link->u.mgd.dtim_period = elems->dtim_period; 7411 link->u.mgd.have_beacon = true; 7412 ifmgd->assoc_data->need_beacon = false; 7413 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7414 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7415 bss_conf->sync_tsf = 7416 le64_to_cpu(mgmt->u.beacon.timestamp); 7417 bss_conf->sync_device_ts = 7418 rx_status->device_timestamp; 7419 bss_conf->sync_dtim_count = elems->dtim_count; 7420 } 7421 7422 if (elems->mbssid_config_ie) 7423 bss_conf->profile_periodicity = 7424 elems->mbssid_config_ie->profile_periodicity; 7425 else 7426 bss_conf->profile_periodicity = 0; 7427 7428 if (elems->ext_capab_len >= 11 && 7429 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7430 bss_conf->ema_ap = true; 7431 else 7432 bss_conf->ema_ap = false; 7433 7434 /* continue assoc process */ 7435 ifmgd->assoc_data->timeout = jiffies; 7436 ifmgd->assoc_data->timeout_started = true; 7437 run_again(sdata, ifmgd->assoc_data->timeout); 7438 kfree(elems); 7439 return; 7440 } 7441 7442 if (!ifmgd->associated || 7443 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7444 return; 7445 bssid = link->u.mgd.bssid; 7446 7447 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7448 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7449 local, rx_status); 7450 7451 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7452 mlme_dbg_ratelimited(sdata, 7453 "cancelling AP probe due to a received beacon\n"); 7454 ieee80211_reset_ap_probe(sdata); 7455 } 7456 7457 /* 7458 * Push the beacon loss detection into the future since 7459 * we are processing a beacon from the AP just now. 7460 */ 7461 ieee80211_sta_reset_beacon_monitor(sdata); 7462 7463 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7464 * element (which carries the beacon interval). Don't forget to add a 7465 * bit to care_about_ies[] above if mac80211 is interested in a 7466 * changing S1G element. 7467 */ 7468 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7469 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7470 parse_params.bss = bss_conf->bss; 7471 parse_params.filter = care_about_ies; 7472 parse_params.crc = ncrc; 7473 elems = ieee802_11_parse_elems_full(&parse_params); 7474 if (!elems) 7475 return; 7476 7477 if (rx_status->flag & RX_FLAG_DECRYPTED && 7478 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7479 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7480 sdata->vif.cfg.ap_addr); 7481 __ieee80211_disconnect(sdata); 7482 return; 7483 } 7484 7485 ncrc = elems->crc; 7486 7487 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7488 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7489 vif_cfg->s1g)) { 7490 if (local->hw.conf.dynamic_ps_timeout > 0) { 7491 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7492 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7493 ieee80211_hw_config(local, -1, 7494 IEEE80211_CONF_CHANGE_PS); 7495 } 7496 ieee80211_send_nullfunc(local, sdata, false); 7497 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7498 local->pspolling = true; 7499 7500 /* 7501 * Here is assumed that the driver will be 7502 * able to send ps-poll frame and receive a 7503 * response even though power save mode is 7504 * enabled, but some drivers might require 7505 * to disable power save here. This needs 7506 * to be investigated. 7507 */ 7508 ieee80211_send_pspoll(local, sdata); 7509 } 7510 } 7511 7512 if (sdata->vif.p2p || 7513 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7514 struct ieee80211_p2p_noa_attr noa = {}; 7515 int ret; 7516 7517 ret = cfg80211_get_p2p_attr(variable, 7518 len - baselen, 7519 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7520 (u8 *) &noa, sizeof(noa)); 7521 if (ret >= 2) { 7522 if (link->u.mgd.p2p_noa_index != noa.index) { 7523 /* valid noa_attr and index changed */ 7524 link->u.mgd.p2p_noa_index = noa.index; 7525 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7526 changed |= BSS_CHANGED_P2P_PS; 7527 /* 7528 * make sure we update all information, the CRC 7529 * mechanism doesn't look at P2P attributes. 7530 */ 7531 link->u.mgd.beacon_crc_valid = false; 7532 } 7533 } else if (link->u.mgd.p2p_noa_index != -1) { 7534 /* noa_attr not found and we had valid noa_attr before */ 7535 link->u.mgd.p2p_noa_index = -1; 7536 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7537 changed |= BSS_CHANGED_P2P_PS; 7538 link->u.mgd.beacon_crc_valid = false; 7539 } 7540 } 7541 7542 /* 7543 * Update beacon timing and dtim count on every beacon appearance. This 7544 * will allow the driver to use the most updated values. Do it before 7545 * comparing this one with last received beacon. 7546 * IMPORTANT: These parameters would possibly be out of sync by the time 7547 * the driver will use them. The synchronized view is currently 7548 * guaranteed only in certain callbacks. 7549 */ 7550 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7551 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7552 bss_conf->sync_tsf = 7553 le64_to_cpu(mgmt->u.beacon.timestamp); 7554 bss_conf->sync_device_ts = 7555 rx_status->device_timestamp; 7556 bss_conf->sync_dtim_count = elems->dtim_count; 7557 } 7558 7559 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7560 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7561 parse_params.start, 7562 parse_params.len))) 7563 goto free; 7564 link->u.mgd.beacon_crc = ncrc; 7565 link->u.mgd.beacon_crc_valid = true; 7566 7567 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7568 7569 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7570 rx_status->device_timestamp, 7571 elems, elems, 7572 IEEE80211_CSA_SOURCE_BEACON); 7573 7574 /* note that after this elems->ml_basic can no longer be used fully */ 7575 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7576 7577 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7578 7579 if (!sdata->u.mgd.epcs.enabled && 7580 !link->u.mgd.disable_wmm_tracking && 7581 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7582 elems->wmm_param_len, 7583 elems->mu_edca_param_set)) 7584 changed |= BSS_CHANGED_QOS; 7585 7586 /* 7587 * If we haven't had a beacon before, tell the driver about the 7588 * DTIM period (and beacon timing if desired) now. 7589 */ 7590 if (!link->u.mgd.have_beacon) { 7591 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7592 bss_conf->dtim_period = elems->dtim_period ?: 1; 7593 7594 changed |= BSS_CHANGED_BEACON_INFO; 7595 link->u.mgd.have_beacon = true; 7596 7597 ieee80211_recalc_ps(local); 7598 7599 ieee80211_recalc_ps_vif(sdata); 7600 } 7601 7602 if (elems->erp_info) { 7603 erp_valid = true; 7604 erp_value = elems->erp_info[0]; 7605 } else { 7606 erp_valid = false; 7607 } 7608 7609 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7610 changed |= ieee80211_handle_bss_capability(link, 7611 le16_to_cpu(mgmt->u.beacon.capab_info), 7612 erp_valid, erp_value); 7613 7614 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7615 if (WARN_ON(!sta)) { 7616 goto free; 7617 } 7618 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7619 lockdep_is_held(&local->hw.wiphy->mtx)); 7620 if (WARN_ON(!link_sta)) { 7621 goto free; 7622 } 7623 7624 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7625 goto free; 7626 7627 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7628 7629 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7630 7631 if (ieee80211_config_bw(link, elems, true, &changed, 7632 IEEE80211_STYPE_BEACON)) { 7633 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7634 WLAN_REASON_DEAUTH_LEAVING, 7635 true, deauth_buf); 7636 ieee80211_report_disconnect(sdata, deauth_buf, 7637 sizeof(deauth_buf), true, 7638 WLAN_REASON_DEAUTH_LEAVING, 7639 false); 7640 goto free; 7641 } 7642 7643 if (elems->opmode_notif) 7644 ieee80211_vht_handle_opmode(sdata, link_sta, 7645 *elems->opmode_notif, 7646 rx_status->band); 7647 7648 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7649 elems->country_elem, 7650 elems->country_elem_len, 7651 elems->pwr_constr_elem, 7652 elems->cisco_dtpc_elem); 7653 7654 ieee80211_ml_reconfiguration(sdata, elems); 7655 ieee80211_process_adv_ttlm(sdata, elems, 7656 le64_to_cpu(mgmt->u.beacon.timestamp)); 7657 7658 ieee80211_link_info_change_notify(sdata, link, changed); 7659 free: 7660 kfree(elems); 7661 } 7662 7663 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7664 struct ieee80211_neg_ttlm neg_ttlm) 7665 { 7666 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7667 u8 i; 7668 7669 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7670 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7671 7672 /* If there is an active TTLM, unset previously suspended links */ 7673 if (sdata->vif.neg_ttlm.valid) 7674 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7675 7676 /* exclude links that are already disabled by advertised TTLM */ 7677 new_active_links = 7678 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7679 new_suspended_links = 7680 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7681 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7682 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7683 new_dormant_links, new_suspended_links)) 7684 return; 7685 7686 sdata->vif.neg_ttlm = neg_ttlm; 7687 sdata->vif.neg_ttlm.valid = true; 7688 } 7689 7690 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7691 struct wiphy_work *work) 7692 { 7693 struct ieee80211_sub_if_data *sdata = 7694 container_of(work, struct ieee80211_sub_if_data, 7695 u.mgd.neg_ttlm_timeout_work.work); 7696 7697 sdata_info(sdata, 7698 "No negotiated TTLM response from AP, disconnecting.\n"); 7699 7700 __ieee80211_disconnect(sdata); 7701 } 7702 7703 static void 7704 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7705 struct ieee80211_neg_ttlm *neg_ttlm) 7706 { 7707 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7708 7709 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7710 sizeof(neg_ttlm->downlink))) { 7711 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7712 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7713 } else { 7714 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7715 } 7716 7717 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7718 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7719 __le16 map; 7720 7721 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7722 7723 pos = skb_put(skb, len + 2); 7724 *pos++ = WLAN_EID_EXTENSION; 7725 len_pos = pos++; 7726 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7727 *pos++ = direction[i]; 7728 map_ind_pos = pos++; 7729 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7730 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7731 cpu_to_le16(neg_ttlm->uplink[tid]) : 7732 cpu_to_le16(neg_ttlm->downlink[tid]); 7733 if (!map) 7734 continue; 7735 7736 len += 2; 7737 map_ind |= BIT(tid); 7738 skb_put_data(skb, &map, sizeof(map)); 7739 } 7740 7741 *map_ind_pos = map_ind; 7742 *len_pos = len; 7743 7744 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7745 break; 7746 } 7747 } 7748 7749 static void 7750 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7751 struct ieee80211_neg_ttlm *neg_ttlm, 7752 u8 dialog_token) 7753 { 7754 struct ieee80211_local *local = sdata->local; 7755 struct ieee80211_mgmt *mgmt; 7756 struct sk_buff *skb; 7757 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7758 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7759 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7760 7761 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7762 if (!skb) 7763 return; 7764 7765 skb_reserve(skb, local->tx_headroom); 7766 mgmt = skb_put_zero(skb, hdr_len); 7767 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7768 IEEE80211_STYPE_ACTION); 7769 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7770 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7771 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7772 7773 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7774 mgmt->u.action.u.ttlm_req.action_code = 7775 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7776 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7777 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7778 ieee80211_tx_skb(sdata, skb); 7779 } 7780 7781 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7782 struct cfg80211_ttlm_params *params) 7783 { 7784 struct ieee80211_neg_ttlm neg_ttlm = {}; 7785 u8 i; 7786 7787 if (!ieee80211_vif_is_mld(&sdata->vif) || 7788 !(sdata->vif.cfg.mld_capa_op & 7789 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7790 return -EINVAL; 7791 7792 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7793 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7794 (params->ulink[i] & ~sdata->vif.valid_links)) 7795 return -EINVAL; 7796 7797 neg_ttlm.downlink[i] = params->dlink[i]; 7798 neg_ttlm.uplink[i] = params->ulink[i]; 7799 } 7800 7801 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7802 NEG_TTLM_RES_ACCEPT) 7803 return -EINVAL; 7804 7805 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7806 sdata->u.mgd.dialog_token_alloc++; 7807 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7808 sdata->u.mgd.dialog_token_alloc); 7809 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7810 &sdata->u.mgd.neg_ttlm_timeout_work); 7811 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7812 &sdata->u.mgd.neg_ttlm_timeout_work, 7813 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7814 return 0; 7815 } 7816 7817 static void 7818 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7819 enum ieee80211_neg_ttlm_res ttlm_res, 7820 u8 dialog_token, 7821 struct ieee80211_neg_ttlm *neg_ttlm) 7822 { 7823 struct ieee80211_local *local = sdata->local; 7824 struct ieee80211_mgmt *mgmt; 7825 struct sk_buff *skb; 7826 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7827 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7828 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7829 u16 status_code; 7830 7831 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7832 if (!skb) 7833 return; 7834 7835 skb_reserve(skb, local->tx_headroom); 7836 mgmt = skb_put_zero(skb, hdr_len); 7837 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7838 IEEE80211_STYPE_ACTION); 7839 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7840 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7841 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7842 7843 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7844 mgmt->u.action.u.ttlm_res.action_code = 7845 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7846 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7847 switch (ttlm_res) { 7848 default: 7849 WARN_ON(1); 7850 fallthrough; 7851 case NEG_TTLM_RES_REJECT: 7852 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7853 break; 7854 case NEG_TTLM_RES_ACCEPT: 7855 status_code = WLAN_STATUS_SUCCESS; 7856 break; 7857 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7858 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7859 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7860 break; 7861 } 7862 7863 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7864 ieee80211_tx_skb(sdata, skb); 7865 } 7866 7867 static int 7868 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7869 const struct ieee80211_ttlm_elem *ttlm, 7870 struct ieee80211_neg_ttlm *neg_ttlm, 7871 u8 *direction) 7872 { 7873 u8 control, link_map_presence, map_size, tid; 7874 u8 *pos; 7875 7876 /* The element size was already validated in 7877 * ieee80211_tid_to_link_map_size_ok() 7878 */ 7879 pos = (void *)ttlm->optional; 7880 7881 control = ttlm->control; 7882 7883 /* mapping switch time and expected duration fields are not expected 7884 * in case of negotiated TTLM 7885 */ 7886 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7887 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7888 mlme_dbg(sdata, 7889 "Invalid TTLM element in negotiated TTLM request\n"); 7890 return -EINVAL; 7891 } 7892 7893 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7894 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7895 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7896 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7897 } 7898 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7899 return 0; 7900 } 7901 7902 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7903 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7904 *direction != IEEE80211_TTLM_DIRECTION_UP && 7905 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7906 return -EINVAL; 7907 7908 link_map_presence = *pos; 7909 pos++; 7910 7911 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7912 map_size = 1; 7913 else 7914 map_size = 2; 7915 7916 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7917 u16 map; 7918 7919 if (link_map_presence & BIT(tid)) { 7920 map = ieee80211_get_ttlm(map_size, pos); 7921 if (!map) { 7922 mlme_dbg(sdata, 7923 "No active links for TID %d", tid); 7924 return -EINVAL; 7925 } 7926 } else { 7927 map = 0; 7928 } 7929 7930 switch (*direction) { 7931 case IEEE80211_TTLM_DIRECTION_BOTH: 7932 neg_ttlm->downlink[tid] = map; 7933 neg_ttlm->uplink[tid] = map; 7934 break; 7935 case IEEE80211_TTLM_DIRECTION_DOWN: 7936 neg_ttlm->downlink[tid] = map; 7937 break; 7938 case IEEE80211_TTLM_DIRECTION_UP: 7939 neg_ttlm->uplink[tid] = map; 7940 break; 7941 default: 7942 return -EINVAL; 7943 } 7944 pos += map_size; 7945 } 7946 return 0; 7947 } 7948 7949 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7950 struct ieee80211_mgmt *mgmt, size_t len) 7951 { 7952 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7953 size_t ies_len; 7954 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7955 struct ieee802_11_elems *elems = NULL; 7956 struct ieee80211_neg_ttlm neg_ttlm = {}; 7957 7958 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7959 7960 if (!ieee80211_vif_is_mld(&sdata->vif)) 7961 return; 7962 7963 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7964 ies_len = len - offsetof(struct ieee80211_mgmt, 7965 u.action.u.ttlm_req.variable); 7966 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7967 ies_len, 7968 IEEE80211_FTYPE_MGMT | 7969 IEEE80211_STYPE_ACTION, 7970 NULL); 7971 if (!elems) { 7972 ttlm_res = NEG_TTLM_RES_REJECT; 7973 goto out; 7974 } 7975 7976 for (i = 0; i < elems->ttlm_num; i++) { 7977 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7978 &neg_ttlm, &direction[i]) || 7979 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7980 elems->ttlm_num != 1)) { 7981 ttlm_res = NEG_TTLM_RES_REJECT; 7982 goto out; 7983 } 7984 } 7985 7986 if (!elems->ttlm_num || 7987 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7988 ttlm_res = NEG_TTLM_RES_REJECT; 7989 goto out; 7990 } 7991 7992 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7993 if ((neg_ttlm.downlink[i] && 7994 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7995 (neg_ttlm.uplink[i] && 7996 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7997 ttlm_res = NEG_TTLM_RES_REJECT; 7998 goto out; 7999 } 8000 } 8001 8002 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8003 8004 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8005 goto out; 8006 8007 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8008 out: 8009 kfree(elems); 8010 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8011 } 8012 8013 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8014 struct ieee80211_mgmt *mgmt, size_t len) 8015 { 8016 if (!ieee80211_vif_is_mld(&sdata->vif) || 8017 mgmt->u.action.u.ttlm_req.dialog_token != 8018 sdata->u.mgd.dialog_token_alloc) 8019 return; 8020 8021 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8022 &sdata->u.mgd.neg_ttlm_timeout_work); 8023 8024 /* MLD station sends a TID to link mapping request, mainly to handle 8025 * BTM (BSS transition management) request, in which case it needs to 8026 * restrict the active links set. 8027 * In this case it's not expected that the MLD AP will reject the 8028 * negotiated TTLM request. 8029 * This can be better implemented in the future, to handle request 8030 * rejections. 8031 */ 8032 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8033 __ieee80211_disconnect(sdata); 8034 } 8035 8036 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8037 { 8038 u16 new_dormant_links; 8039 8040 if (!sdata->vif.neg_ttlm.valid) 8041 return; 8042 8043 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8044 new_dormant_links = 8045 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8046 sdata->vif.suspended_links = 0; 8047 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8048 new_dormant_links); 8049 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8050 BSS_CHANGED_MLD_VALID_LINKS); 8051 } 8052 8053 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8054 struct wiphy_work *work) 8055 { 8056 struct ieee80211_sub_if_data *sdata = 8057 container_of(work, struct ieee80211_sub_if_data, 8058 u.mgd.teardown_ttlm_work); 8059 8060 ieee80211_process_ttlm_teardown(sdata); 8061 } 8062 8063 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8064 { 8065 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8066 struct ieee80211_local *local = sdata->local; 8067 struct ieee80211_mgmt *mgmt; 8068 struct sk_buff *skb; 8069 int frame_len = offsetofend(struct ieee80211_mgmt, 8070 u.action.u.ttlm_tear_down); 8071 struct ieee80211_tx_info *info; 8072 8073 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8074 if (!skb) 8075 return; 8076 8077 skb_reserve(skb, local->hw.extra_tx_headroom); 8078 mgmt = skb_put_zero(skb, frame_len); 8079 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8080 IEEE80211_STYPE_ACTION); 8081 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8082 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8083 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8084 8085 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8086 mgmt->u.action.u.ttlm_tear_down.action_code = 8087 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8088 8089 info = IEEE80211_SKB_CB(skb); 8090 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8091 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8092 ieee80211_tx_skb(sdata, skb); 8093 } 8094 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8095 8096 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8097 struct sk_buff *skb) 8098 { 8099 struct ieee80211_link_data *link = &sdata->deflink; 8100 struct ieee80211_rx_status *rx_status; 8101 struct ieee80211_hdr *hdr; 8102 u16 fc; 8103 8104 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8105 8106 rx_status = (struct ieee80211_rx_status *) skb->cb; 8107 hdr = (struct ieee80211_hdr *) skb->data; 8108 fc = le16_to_cpu(hdr->frame_control); 8109 8110 switch (fc & IEEE80211_FCTL_STYPE) { 8111 case IEEE80211_STYPE_S1G_BEACON: 8112 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8113 break; 8114 } 8115 } 8116 8117 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8118 struct sk_buff *skb) 8119 { 8120 struct ieee80211_link_data *link = &sdata->deflink; 8121 struct ieee80211_rx_status *rx_status; 8122 struct ieee802_11_elems *elems; 8123 struct ieee80211_mgmt *mgmt; 8124 u16 fc; 8125 int ies_len; 8126 8127 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8128 8129 rx_status = (struct ieee80211_rx_status *) skb->cb; 8130 mgmt = (struct ieee80211_mgmt *) skb->data; 8131 fc = le16_to_cpu(mgmt->frame_control); 8132 8133 if (rx_status->link_valid) { 8134 link = sdata_dereference(sdata->link[rx_status->link_id], 8135 sdata); 8136 if (!link) 8137 return; 8138 } 8139 8140 switch (fc & IEEE80211_FCTL_STYPE) { 8141 case IEEE80211_STYPE_BEACON: 8142 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8143 skb->len, rx_status); 8144 break; 8145 case IEEE80211_STYPE_PROBE_RESP: 8146 ieee80211_rx_mgmt_probe_resp(link, skb); 8147 break; 8148 case IEEE80211_STYPE_AUTH: 8149 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8150 break; 8151 case IEEE80211_STYPE_DEAUTH: 8152 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8153 break; 8154 case IEEE80211_STYPE_DISASSOC: 8155 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8156 break; 8157 case IEEE80211_STYPE_ASSOC_RESP: 8158 case IEEE80211_STYPE_REASSOC_RESP: 8159 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8160 break; 8161 case IEEE80211_STYPE_ACTION: 8162 if (!sdata->u.mgd.associated || 8163 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8164 break; 8165 8166 switch (mgmt->u.action.category) { 8167 case WLAN_CATEGORY_SPECTRUM_MGMT: 8168 ies_len = skb->len - 8169 offsetof(struct ieee80211_mgmt, 8170 u.action.u.chan_switch.variable); 8171 8172 if (ies_len < 0) 8173 break; 8174 8175 /* CSA IE cannot be overridden, no need for BSSID */ 8176 elems = ieee802_11_parse_elems(mgmt->u.action.u.chan_switch.variable, 8177 ies_len, 8178 IEEE80211_FTYPE_MGMT | 8179 IEEE80211_STYPE_ACTION, 8180 NULL); 8181 8182 if (elems && !elems->parse_error) { 8183 enum ieee80211_csa_source src = 8184 IEEE80211_CSA_SOURCE_PROT_ACTION; 8185 8186 ieee80211_sta_process_chanswitch(link, 8187 rx_status->mactime, 8188 rx_status->device_timestamp, 8189 elems, elems, 8190 src); 8191 } 8192 kfree(elems); 8193 break; 8194 case WLAN_CATEGORY_PUBLIC: 8195 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8196 ies_len = skb->len - 8197 offsetof(struct ieee80211_mgmt, 8198 u.action.u.ext_chan_switch.variable); 8199 8200 if (ies_len < 0) 8201 break; 8202 8203 /* 8204 * extended CSA IE can't be overridden, no need for 8205 * BSSID 8206 */ 8207 elems = ieee802_11_parse_elems(mgmt->u.action.u.ext_chan_switch.variable, 8208 ies_len, 8209 IEEE80211_FTYPE_MGMT | 8210 IEEE80211_STYPE_ACTION, 8211 NULL); 8212 8213 if (elems && !elems->parse_error) { 8214 enum ieee80211_csa_source src; 8215 8216 if (mgmt->u.action.category == 8217 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8218 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8219 else 8220 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8221 8222 /* for the handling code pretend it was an IE */ 8223 elems->ext_chansw_ie = 8224 &mgmt->u.action.u.ext_chan_switch.data; 8225 8226 ieee80211_sta_process_chanswitch(link, 8227 rx_status->mactime, 8228 rx_status->device_timestamp, 8229 elems, elems, 8230 src); 8231 } 8232 8233 kfree(elems); 8234 break; 8235 } 8236 break; 8237 } 8238 } 8239 8240 static void ieee80211_sta_timer(struct timer_list *t) 8241 { 8242 struct ieee80211_sub_if_data *sdata = 8243 timer_container_of(sdata, t, u.mgd.timer); 8244 8245 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8246 } 8247 8248 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8249 u8 reason, bool tx) 8250 { 8251 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8252 8253 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8254 tx, frame_buf); 8255 8256 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8257 reason, false); 8258 } 8259 8260 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8261 { 8262 struct ieee80211_local *local = sdata->local; 8263 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8264 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8265 u32 tx_flags = 0; 8266 u16 trans = 1; 8267 u16 status = 0; 8268 struct ieee80211_prep_tx_info info = { 8269 .subtype = IEEE80211_STYPE_AUTH, 8270 }; 8271 8272 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8273 8274 if (WARN_ON_ONCE(!auth_data)) 8275 return -EINVAL; 8276 8277 auth_data->tries++; 8278 8279 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8280 sdata_info(sdata, "authentication with %pM timed out\n", 8281 auth_data->ap_addr); 8282 8283 /* 8284 * Most likely AP is not in the range so remove the 8285 * bss struct for that AP. 8286 */ 8287 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8288 8289 return -ETIMEDOUT; 8290 } 8291 8292 if (auth_data->algorithm == WLAN_AUTH_SAE) 8293 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8294 8295 info.link_id = auth_data->link_id; 8296 drv_mgd_prepare_tx(local, sdata, &info); 8297 8298 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8299 auth_data->ap_addr, auth_data->tries, 8300 IEEE80211_AUTH_MAX_TRIES); 8301 8302 auth_data->expected_transaction = 2; 8303 8304 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8305 trans = auth_data->sae_trans; 8306 status = auth_data->sae_status; 8307 auth_data->expected_transaction = trans; 8308 } 8309 8310 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8311 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8312 IEEE80211_TX_INTFL_MLME_CONN_TX; 8313 8314 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8315 auth_data->data, auth_data->data_len, 8316 auth_data->ap_addr, auth_data->ap_addr, 8317 NULL, 0, 0, tx_flags); 8318 8319 if (tx_flags == 0) { 8320 if (auth_data->algorithm == WLAN_AUTH_SAE) 8321 auth_data->timeout = jiffies + 8322 IEEE80211_AUTH_TIMEOUT_SAE; 8323 else 8324 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8325 } else { 8326 auth_data->timeout = 8327 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8328 } 8329 8330 auth_data->timeout_started = true; 8331 run_again(sdata, auth_data->timeout); 8332 8333 return 0; 8334 } 8335 8336 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8337 { 8338 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8339 struct ieee80211_local *local = sdata->local; 8340 int ret; 8341 8342 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8343 8344 assoc_data->tries++; 8345 assoc_data->comeback = false; 8346 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8347 sdata_info(sdata, "association with %pM timed out\n", 8348 assoc_data->ap_addr); 8349 8350 /* 8351 * Most likely AP is not in the range so remove the 8352 * bss struct for that AP. 8353 */ 8354 cfg80211_unlink_bss(local->hw.wiphy, 8355 assoc_data->link[assoc_data->assoc_link_id].bss); 8356 8357 return -ETIMEDOUT; 8358 } 8359 8360 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8361 assoc_data->ap_addr, assoc_data->tries, 8362 IEEE80211_ASSOC_MAX_TRIES); 8363 ret = ieee80211_send_assoc(sdata); 8364 if (ret) 8365 return ret; 8366 8367 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8368 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8369 assoc_data->timeout_started = true; 8370 run_again(sdata, assoc_data->timeout); 8371 } else { 8372 assoc_data->timeout = 8373 round_jiffies_up(jiffies + 8374 IEEE80211_ASSOC_TIMEOUT_LONG); 8375 assoc_data->timeout_started = true; 8376 run_again(sdata, assoc_data->timeout); 8377 } 8378 8379 return 0; 8380 } 8381 8382 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8383 __le16 fc, bool acked) 8384 { 8385 struct ieee80211_local *local = sdata->local; 8386 8387 sdata->u.mgd.status_fc = fc; 8388 sdata->u.mgd.status_acked = acked; 8389 sdata->u.mgd.status_received = true; 8390 8391 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8392 } 8393 8394 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8395 { 8396 struct ieee80211_local *local = sdata->local; 8397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8398 8399 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8400 8401 if (ifmgd->status_received) { 8402 __le16 fc = ifmgd->status_fc; 8403 bool status_acked = ifmgd->status_acked; 8404 8405 ifmgd->status_received = false; 8406 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8407 if (status_acked) { 8408 if (ifmgd->auth_data->algorithm == 8409 WLAN_AUTH_SAE) 8410 ifmgd->auth_data->timeout = 8411 jiffies + 8412 IEEE80211_AUTH_TIMEOUT_SAE; 8413 else 8414 ifmgd->auth_data->timeout = 8415 jiffies + 8416 IEEE80211_AUTH_TIMEOUT_SHORT; 8417 run_again(sdata, ifmgd->auth_data->timeout); 8418 } else { 8419 ifmgd->auth_data->timeout = jiffies - 1; 8420 } 8421 ifmgd->auth_data->timeout_started = true; 8422 } else if (ifmgd->assoc_data && 8423 !ifmgd->assoc_data->comeback && 8424 (ieee80211_is_assoc_req(fc) || 8425 ieee80211_is_reassoc_req(fc))) { 8426 /* 8427 * Update association timeout based on the TX status 8428 * for the (Re)Association Request frame. Skip this if 8429 * we have already processed a (Re)Association Response 8430 * frame that indicated need for association comeback 8431 * at a specific time in the future. This could happen 8432 * if the TX status information is delayed enough for 8433 * the response to be received and processed first. 8434 */ 8435 if (status_acked) { 8436 ifmgd->assoc_data->timeout = 8437 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8438 run_again(sdata, ifmgd->assoc_data->timeout); 8439 } else { 8440 ifmgd->assoc_data->timeout = jiffies - 1; 8441 } 8442 ifmgd->assoc_data->timeout_started = true; 8443 } 8444 } 8445 8446 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8447 time_after(jiffies, ifmgd->auth_data->timeout)) { 8448 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8449 /* 8450 * ok ... we waited for assoc or continuation but 8451 * userspace didn't do it, so kill the auth data 8452 */ 8453 ieee80211_destroy_auth_data(sdata, false); 8454 } else if (ieee80211_auth(sdata)) { 8455 u8 ap_addr[ETH_ALEN]; 8456 struct ieee80211_event event = { 8457 .type = MLME_EVENT, 8458 .u.mlme.data = AUTH_EVENT, 8459 .u.mlme.status = MLME_TIMEOUT, 8460 }; 8461 8462 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8463 8464 ieee80211_destroy_auth_data(sdata, false); 8465 8466 cfg80211_auth_timeout(sdata->dev, ap_addr); 8467 drv_event_callback(sdata->local, sdata, &event); 8468 } 8469 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8470 run_again(sdata, ifmgd->auth_data->timeout); 8471 8472 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8473 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8474 if ((ifmgd->assoc_data->need_beacon && 8475 !sdata->deflink.u.mgd.have_beacon) || 8476 ieee80211_do_assoc(sdata)) { 8477 struct ieee80211_event event = { 8478 .type = MLME_EVENT, 8479 .u.mlme.data = ASSOC_EVENT, 8480 .u.mlme.status = MLME_TIMEOUT, 8481 }; 8482 8483 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8484 drv_event_callback(sdata->local, sdata, &event); 8485 } 8486 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8487 run_again(sdata, ifmgd->assoc_data->timeout); 8488 8489 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8490 ifmgd->associated) { 8491 u8 *bssid = sdata->deflink.u.mgd.bssid; 8492 int max_tries; 8493 8494 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8495 max_tries = max_nullfunc_tries; 8496 else 8497 max_tries = max_probe_tries; 8498 8499 /* ACK received for nullfunc probing frame */ 8500 if (!ifmgd->probe_send_count) 8501 ieee80211_reset_ap_probe(sdata); 8502 else if (ifmgd->nullfunc_failed) { 8503 if (ifmgd->probe_send_count < max_tries) { 8504 mlme_dbg(sdata, 8505 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8506 bssid, ifmgd->probe_send_count, 8507 max_tries); 8508 ieee80211_mgd_probe_ap_send(sdata); 8509 } else { 8510 mlme_dbg(sdata, 8511 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8512 bssid); 8513 ieee80211_sta_connection_lost(sdata, 8514 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8515 false); 8516 } 8517 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8518 run_again(sdata, ifmgd->probe_timeout); 8519 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8520 mlme_dbg(sdata, 8521 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8522 bssid, probe_wait_ms); 8523 ieee80211_sta_connection_lost(sdata, 8524 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8525 } else if (ifmgd->probe_send_count < max_tries) { 8526 mlme_dbg(sdata, 8527 "No probe response from AP %pM after %dms, try %d/%i\n", 8528 bssid, probe_wait_ms, 8529 ifmgd->probe_send_count, max_tries); 8530 ieee80211_mgd_probe_ap_send(sdata); 8531 } else { 8532 /* 8533 * We actually lost the connection ... or did we? 8534 * Let's make sure! 8535 */ 8536 mlme_dbg(sdata, 8537 "No probe response from AP %pM after %dms, disconnecting.\n", 8538 bssid, probe_wait_ms); 8539 8540 ieee80211_sta_connection_lost(sdata, 8541 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8542 } 8543 } 8544 } 8545 8546 static bool 8547 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8548 { 8549 /* 8550 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8551 * the links. 8552 */ 8553 struct ieee80211_link_data *link; 8554 8555 guard(rcu)(); 8556 8557 for_each_link_data_rcu(sdata, link) { 8558 if (!(link->conf->csa_active && 8559 !link->u.mgd.csa.waiting_bcn)) 8560 return false; 8561 } 8562 8563 return true; 8564 } 8565 8566 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8567 { 8568 struct ieee80211_sub_if_data *sdata = 8569 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8570 8571 if (ieee80211_is_csa_in_progress(sdata)) 8572 return; 8573 8574 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8575 return; 8576 8577 sdata->u.mgd.connection_loss = false; 8578 wiphy_work_queue(sdata->local->hw.wiphy, 8579 &sdata->u.mgd.beacon_connection_loss_work); 8580 } 8581 8582 static unsigned long 8583 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8584 { 8585 unsigned long latest_timeout = jiffies; 8586 unsigned int link_id; 8587 struct sta_info *sta; 8588 8589 guard(rcu)(); 8590 8591 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8592 if (!sta) 8593 return 0; 8594 8595 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8596 link_id++) { 8597 struct link_sta_info *link_sta; 8598 unsigned long timeout; 8599 8600 link_sta = rcu_dereference(sta->link[link_id]); 8601 if (!link_sta) 8602 continue; 8603 8604 timeout = link_sta->status_stats.last_ack; 8605 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8606 timeout = link_sta->rx_stats.last_rx; 8607 8608 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8609 8610 /* 8611 * latest_timeout holds the timeout of the link 8612 * that will expire last among all links in an 8613 * non-AP MLD STA. This ensures that the connection 8614 * monitor timer is only reset if at least one link 8615 * is still active, and it is scheduled to fire at 8616 * the latest possible timeout. 8617 */ 8618 if (time_after(timeout, latest_timeout)) 8619 latest_timeout = timeout; 8620 } 8621 8622 return latest_timeout; 8623 } 8624 8625 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8626 { 8627 struct ieee80211_sub_if_data *sdata = 8628 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8629 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8630 struct ieee80211_local *local = sdata->local; 8631 unsigned long latest_timeout; 8632 8633 if (ieee80211_is_csa_in_progress(sdata)) 8634 return; 8635 8636 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8637 8638 /* 8639 * If latest timeout is after now, then update timer to fire at 8640 * the later date, but do not actually probe at this time. 8641 */ 8642 if (time_is_after_jiffies(latest_timeout)) { 8643 mod_timer(&ifmgd->conn_mon_timer, 8644 round_jiffies_up(latest_timeout)); 8645 return; 8646 } 8647 8648 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8649 } 8650 8651 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8652 struct wiphy_work *work) 8653 { 8654 struct ieee80211_sub_if_data *sdata = 8655 container_of(work, struct ieee80211_sub_if_data, 8656 u.mgd.monitor_work); 8657 8658 ieee80211_mgd_probe_ap(sdata, false); 8659 } 8660 8661 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8662 { 8663 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8664 __ieee80211_stop_poll(sdata); 8665 8666 /* let's probe the connection once */ 8667 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8668 wiphy_work_queue(sdata->local->hw.wiphy, 8669 &sdata->u.mgd.monitor_work); 8670 } 8671 } 8672 8673 #ifdef CONFIG_PM 8674 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8675 { 8676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8677 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8678 8679 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8680 8681 if (ifmgd->auth_data || ifmgd->assoc_data) { 8682 const u8 *ap_addr = ifmgd->auth_data ? 8683 ifmgd->auth_data->ap_addr : 8684 ifmgd->assoc_data->ap_addr; 8685 8686 /* 8687 * If we are trying to authenticate / associate while suspending, 8688 * cfg80211 won't know and won't actually abort those attempts, 8689 * thus we need to do that ourselves. 8690 */ 8691 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8692 IEEE80211_STYPE_DEAUTH, 8693 WLAN_REASON_DEAUTH_LEAVING, 8694 false, frame_buf); 8695 if (ifmgd->assoc_data) 8696 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8697 if (ifmgd->auth_data) 8698 ieee80211_destroy_auth_data(sdata, false); 8699 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8700 IEEE80211_DEAUTH_FRAME_LEN, 8701 false); 8702 } 8703 8704 /* This is a bit of a hack - we should find a better and more generic 8705 * solution to this. Normally when suspending, cfg80211 will in fact 8706 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8707 * auth (not so important) or assoc (this is the problem) process. 8708 * 8709 * As a consequence, it can happen that we are in the process of both 8710 * associating and suspending, and receive an association response 8711 * after cfg80211 has checked if it needs to disconnect, but before 8712 * we actually set the flag to drop incoming frames. This will then 8713 * cause the workqueue flush to process the association response in 8714 * the suspend, resulting in a successful association just before it 8715 * tries to remove the interface from the driver, which now though 8716 * has a channel context assigned ... this results in issues. 8717 * 8718 * To work around this (for now) simply deauth here again if we're 8719 * now connected. 8720 */ 8721 if (ifmgd->associated && !sdata->local->wowlan) { 8722 u8 bssid[ETH_ALEN]; 8723 struct cfg80211_deauth_request req = { 8724 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8725 .bssid = bssid, 8726 }; 8727 8728 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8729 ieee80211_mgd_deauth(sdata, &req); 8730 } 8731 } 8732 #endif 8733 8734 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8735 { 8736 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8737 8738 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8739 8740 if (!ifmgd->associated) 8741 return; 8742 8743 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8744 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8745 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8746 ieee80211_sta_connection_lost(sdata, 8747 WLAN_REASON_UNSPECIFIED, 8748 true); 8749 return; 8750 } 8751 8752 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8753 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8754 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8755 ieee80211_sta_connection_lost(sdata, 8756 WLAN_REASON_UNSPECIFIED, 8757 true); 8758 return; 8759 } 8760 } 8761 8762 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8763 struct wiphy_work *work) 8764 { 8765 struct ieee80211_link_data *link = 8766 container_of(work, struct ieee80211_link_data, 8767 u.mgd.request_smps_work); 8768 8769 __ieee80211_request_smps_mgd(link->sdata, link, 8770 link->u.mgd.driver_smps_mode); 8771 } 8772 8773 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8774 struct wiphy_work *work) 8775 { 8776 struct ieee80211_sub_if_data *sdata = 8777 container_of(work, struct ieee80211_sub_if_data, 8778 u.mgd.reconf.wk.work); 8779 8780 if (!sdata->u.mgd.reconf.added_links && 8781 !sdata->u.mgd.reconf.removed_links) 8782 return; 8783 8784 sdata_info(sdata, 8785 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8786 sdata->u.mgd.reconf.added_links, 8787 sdata->u.mgd.reconf.removed_links); 8788 8789 __ieee80211_disconnect(sdata); 8790 } 8791 8792 /* interface setup */ 8793 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8794 { 8795 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8796 8797 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8798 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8799 ieee80211_beacon_connection_loss_work); 8800 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8801 ieee80211_csa_connection_drop_work); 8802 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8803 ieee80211_tdls_peer_del_work); 8804 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 8805 ieee80211_ml_reconf_work); 8806 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8807 ieee80211_ml_sta_reconf_timeout); 8808 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8809 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8810 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8811 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8812 ieee80211_sta_handle_tspec_ac_params_wk); 8813 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 8814 ieee80211_tid_to_link_map_work); 8815 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8816 ieee80211_neg_ttlm_timeout_work); 8817 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8818 ieee80211_teardown_ttlm_work); 8819 8820 ifmgd->flags = 0; 8821 ifmgd->powersave = sdata->wdev.ps; 8822 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8823 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8824 /* Setup TDLS data */ 8825 spin_lock_init(&ifmgd->teardown_lock); 8826 ifmgd->teardown_skb = NULL; 8827 ifmgd->orig_teardown_skb = NULL; 8828 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8829 } 8830 8831 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8832 struct wiphy_work *work) 8833 { 8834 struct ieee80211_link_data *link = 8835 container_of(work, struct ieee80211_link_data, 8836 u.mgd.recalc_smps); 8837 8838 ieee80211_recalc_smps(link->sdata, link); 8839 } 8840 8841 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8842 { 8843 struct ieee80211_sub_if_data *sdata = link->sdata; 8844 struct ieee80211_local *local = sdata->local; 8845 unsigned int link_id = link->link_id; 8846 8847 link->u.mgd.p2p_noa_index = -1; 8848 link->conf->bssid = link->u.mgd.bssid; 8849 link->smps_mode = IEEE80211_SMPS_OFF; 8850 8851 wiphy_work_init(&link->u.mgd.request_smps_work, 8852 ieee80211_request_smps_mgd_work); 8853 wiphy_work_init(&link->u.mgd.recalc_smps, 8854 ieee80211_recalc_smps_work); 8855 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8856 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8857 else 8858 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8859 8860 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 8861 ieee80211_csa_switch_work); 8862 8863 ieee80211_clear_tpe(&link->conf->tpe); 8864 8865 if (sdata->u.mgd.assoc_data) 8866 ether_addr_copy(link->conf->addr, 8867 sdata->u.mgd.assoc_data->link[link_id].addr); 8868 else if (sdata->u.mgd.reconf.add_links_data) 8869 ether_addr_copy(link->conf->addr, 8870 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8871 else if (!is_valid_ether_addr(link->conf->addr)) 8872 eth_random_addr(link->conf->addr); 8873 } 8874 8875 /* scan finished notification */ 8876 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8877 { 8878 struct ieee80211_sub_if_data *sdata; 8879 8880 /* Restart STA timers */ 8881 rcu_read_lock(); 8882 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8883 if (ieee80211_sdata_running(sdata)) 8884 ieee80211_restart_sta_timer(sdata); 8885 } 8886 rcu_read_unlock(); 8887 } 8888 8889 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8890 struct cfg80211_bss *cbss, s8 link_id, 8891 const u8 *ap_mld_addr, bool assoc, 8892 struct ieee80211_conn_settings *conn, 8893 bool override, 8894 unsigned long *userspace_selectors) 8895 { 8896 struct ieee80211_local *local = sdata->local; 8897 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8898 struct ieee80211_bss *bss = (void *)cbss->priv; 8899 struct sta_info *new_sta = NULL; 8900 struct ieee80211_link_data *link; 8901 bool have_sta = false; 8902 bool mlo; 8903 int err; 8904 u16 new_links; 8905 8906 if (link_id >= 0) { 8907 mlo = true; 8908 if (WARN_ON(!ap_mld_addr)) 8909 return -EINVAL; 8910 new_links = BIT(link_id); 8911 } else { 8912 if (WARN_ON(ap_mld_addr)) 8913 return -EINVAL; 8914 ap_mld_addr = cbss->bssid; 8915 new_links = 0; 8916 link_id = 0; 8917 mlo = false; 8918 } 8919 8920 if (assoc) { 8921 rcu_read_lock(); 8922 have_sta = sta_info_get(sdata, ap_mld_addr); 8923 rcu_read_unlock(); 8924 } 8925 8926 if (mlo && !have_sta && 8927 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8928 return -EINVAL; 8929 8930 err = ieee80211_vif_set_links(sdata, new_links, 0); 8931 if (err) 8932 return err; 8933 8934 link = sdata_dereference(sdata->link[link_id], sdata); 8935 if (WARN_ON(!link)) { 8936 err = -ENOLINK; 8937 goto out_err; 8938 } 8939 8940 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8941 err = -EINVAL; 8942 goto out_err; 8943 } 8944 8945 /* If a reconfig is happening, bail out */ 8946 if (local->in_reconfig) { 8947 err = -EBUSY; 8948 goto out_err; 8949 } 8950 8951 if (!have_sta) { 8952 if (mlo) 8953 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8954 link_id, cbss->bssid, 8955 GFP_KERNEL); 8956 else 8957 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8958 8959 if (!new_sta) { 8960 err = -ENOMEM; 8961 goto out_err; 8962 } 8963 8964 new_sta->sta.mlo = mlo; 8965 } 8966 8967 /* 8968 * Set up the information for the new channel before setting the 8969 * new channel. We can't - completely race-free - change the basic 8970 * rates bitmap and the channel (sband) that it refers to, but if 8971 * we set it up before we at least avoid calling into the driver's 8972 * bss_info_changed() method with invalid information (since we do 8973 * call that from changing the channel - only for IDLE and perhaps 8974 * some others, but ...). 8975 * 8976 * So to avoid that, just set up all the new information before the 8977 * channel, but tell the driver to apply it only afterwards, since 8978 * it might need the new channel for that. 8979 */ 8980 if (new_sta) { 8981 const struct cfg80211_bss_ies *ies; 8982 struct link_sta_info *link_sta; 8983 8984 rcu_read_lock(); 8985 link_sta = rcu_dereference(new_sta->link[link_id]); 8986 if (WARN_ON(!link_sta)) { 8987 rcu_read_unlock(); 8988 sta_info_free(local, new_sta); 8989 err = -EINVAL; 8990 goto out_err; 8991 } 8992 8993 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8994 link_sta, cbss); 8995 if (err) { 8996 rcu_read_unlock(); 8997 sta_info_free(local, new_sta); 8998 goto out_err; 8999 } 9000 9001 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9002 9003 /* set timing information */ 9004 link->conf->beacon_int = cbss->beacon_interval; 9005 ies = rcu_dereference(cbss->beacon_ies); 9006 if (ies) { 9007 link->conf->sync_tsf = ies->tsf; 9008 link->conf->sync_device_ts = 9009 bss->device_ts_beacon; 9010 9011 ieee80211_get_dtim(ies, 9012 &link->conf->sync_dtim_count, 9013 NULL); 9014 } else if (!ieee80211_hw_check(&sdata->local->hw, 9015 TIMING_BEACON_ONLY)) { 9016 ies = rcu_dereference(cbss->proberesp_ies); 9017 /* must be non-NULL since beacon IEs were NULL */ 9018 link->conf->sync_tsf = ies->tsf; 9019 link->conf->sync_device_ts = 9020 bss->device_ts_presp; 9021 link->conf->sync_dtim_count = 0; 9022 } else { 9023 link->conf->sync_tsf = 0; 9024 link->conf->sync_device_ts = 0; 9025 link->conf->sync_dtim_count = 0; 9026 } 9027 rcu_read_unlock(); 9028 } 9029 9030 if (new_sta || override) { 9031 /* 9032 * Only set this if we're also going to calculate the AP 9033 * settings etc., otherwise this was set before in a 9034 * previous call. Note override is set to %true in assoc 9035 * if the settings were changed. 9036 */ 9037 link->u.mgd.conn = *conn; 9038 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9039 mlo, &link->u.mgd.conn, 9040 userspace_selectors); 9041 if (err) { 9042 if (new_sta) 9043 sta_info_free(local, new_sta); 9044 goto out_err; 9045 } 9046 /* pass out for use in assoc */ 9047 *conn = link->u.mgd.conn; 9048 } 9049 9050 if (new_sta) { 9051 /* 9052 * tell driver about BSSID, basic rates and timing 9053 * this was set up above, before setting the channel 9054 */ 9055 ieee80211_link_info_change_notify(sdata, link, 9056 BSS_CHANGED_BSSID | 9057 BSS_CHANGED_BASIC_RATES | 9058 BSS_CHANGED_BEACON_INT); 9059 9060 if (assoc) 9061 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9062 9063 err = sta_info_insert(new_sta); 9064 new_sta = NULL; 9065 if (err) { 9066 sdata_info(sdata, 9067 "failed to insert STA entry for the AP (error %d)\n", 9068 err); 9069 goto out_release_chan; 9070 } 9071 } else 9072 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9073 9074 /* Cancel scan to ensure that nothing interferes with connection */ 9075 if (local->scanning) 9076 ieee80211_scan_cancel(local); 9077 9078 return 0; 9079 9080 out_release_chan: 9081 ieee80211_link_release_channel(link); 9082 out_err: 9083 ieee80211_vif_set_links(sdata, 0, 0); 9084 return err; 9085 } 9086 9087 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9088 const struct cfg80211_bss_ies *ies, 9089 u8 cur_channel, bool ignore_ecsa) 9090 { 9091 const struct element *csa_elem, *ecsa_elem; 9092 struct ieee80211_channel_sw_ie *csa = NULL; 9093 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9094 9095 if (!ies) 9096 return false; 9097 9098 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9099 ies->data, ies->len); 9100 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9101 csa = (void *)csa_elem->data; 9102 9103 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9104 ies->data, ies->len); 9105 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9106 ecsa = (void *)ecsa_elem->data; 9107 9108 if (csa && csa->count == 0) 9109 csa = NULL; 9110 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9111 csa = NULL; 9112 9113 if (ecsa && ecsa->count == 0) 9114 ecsa = NULL; 9115 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9116 ecsa = NULL; 9117 9118 if (ignore_ecsa && ecsa) { 9119 sdata_info(sdata, 9120 "Ignoring ECSA in probe response - was considered stuck!\n"); 9121 return csa; 9122 } 9123 9124 return csa || ecsa; 9125 } 9126 9127 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9128 struct cfg80211_bss *bss) 9129 { 9130 u8 cur_channel; 9131 bool ret; 9132 9133 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9134 9135 rcu_read_lock(); 9136 if (ieee80211_mgd_csa_present(sdata, 9137 rcu_dereference(bss->beacon_ies), 9138 cur_channel, false)) { 9139 ret = true; 9140 goto out; 9141 } 9142 9143 if (ieee80211_mgd_csa_present(sdata, 9144 rcu_dereference(bss->proberesp_ies), 9145 cur_channel, bss->proberesp_ecsa_stuck)) { 9146 ret = true; 9147 goto out; 9148 } 9149 9150 ret = false; 9151 out: 9152 rcu_read_unlock(); 9153 return ret; 9154 } 9155 9156 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9157 const u8 *supported_selectors, 9158 u8 supported_selectors_len) 9159 { 9160 if (supported_selectors) { 9161 for (int i = 0; i < supported_selectors_len; i++) { 9162 set_bit(supported_selectors[i], 9163 userspace_selectors); 9164 } 9165 } else { 9166 /* Assume SAE_H2E support for backward compatibility. */ 9167 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9168 userspace_selectors); 9169 } 9170 } 9171 9172 /* config hooks */ 9173 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9174 struct cfg80211_auth_request *req) 9175 { 9176 struct ieee80211_local *local = sdata->local; 9177 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9178 struct ieee80211_mgd_auth_data *auth_data; 9179 struct ieee80211_conn_settings conn; 9180 struct ieee80211_link_data *link; 9181 struct ieee80211_supported_band *sband; 9182 struct ieee80211_bss *bss; 9183 u16 auth_alg; 9184 int err; 9185 bool cont_auth, wmm_used; 9186 9187 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9188 9189 /* prepare auth data structure */ 9190 9191 switch (req->auth_type) { 9192 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9193 auth_alg = WLAN_AUTH_OPEN; 9194 break; 9195 case NL80211_AUTHTYPE_SHARED_KEY: 9196 if (fips_enabled) 9197 return -EOPNOTSUPP; 9198 auth_alg = WLAN_AUTH_SHARED_KEY; 9199 break; 9200 case NL80211_AUTHTYPE_FT: 9201 auth_alg = WLAN_AUTH_FT; 9202 break; 9203 case NL80211_AUTHTYPE_NETWORK_EAP: 9204 auth_alg = WLAN_AUTH_LEAP; 9205 break; 9206 case NL80211_AUTHTYPE_SAE: 9207 auth_alg = WLAN_AUTH_SAE; 9208 break; 9209 case NL80211_AUTHTYPE_FILS_SK: 9210 auth_alg = WLAN_AUTH_FILS_SK; 9211 break; 9212 case NL80211_AUTHTYPE_FILS_SK_PFS: 9213 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9214 break; 9215 case NL80211_AUTHTYPE_FILS_PK: 9216 auth_alg = WLAN_AUTH_FILS_PK; 9217 break; 9218 default: 9219 return -EOPNOTSUPP; 9220 } 9221 9222 if (ifmgd->assoc_data) 9223 return -EBUSY; 9224 9225 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9226 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9227 return -EINVAL; 9228 } 9229 9230 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9231 req->ie_len, GFP_KERNEL); 9232 if (!auth_data) 9233 return -ENOMEM; 9234 9235 memcpy(auth_data->ap_addr, 9236 req->ap_mld_addr ?: req->bss->bssid, 9237 ETH_ALEN); 9238 auth_data->bss = req->bss; 9239 auth_data->link_id = req->link_id; 9240 9241 if (req->auth_data_len >= 4) { 9242 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9243 __le16 *pos = (__le16 *) req->auth_data; 9244 9245 auth_data->sae_trans = le16_to_cpu(pos[0]); 9246 auth_data->sae_status = le16_to_cpu(pos[1]); 9247 } 9248 memcpy(auth_data->data, req->auth_data + 4, 9249 req->auth_data_len - 4); 9250 auth_data->data_len += req->auth_data_len - 4; 9251 } 9252 9253 /* Check if continuing authentication or trying to authenticate with the 9254 * same BSS that we were in the process of authenticating with and avoid 9255 * removal and re-addition of the STA entry in 9256 * ieee80211_prep_connection(). 9257 */ 9258 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9259 ifmgd->auth_data->link_id == req->link_id; 9260 9261 if (req->ie && req->ie_len) { 9262 memcpy(&auth_data->data[auth_data->data_len], 9263 req->ie, req->ie_len); 9264 auth_data->data_len += req->ie_len; 9265 } 9266 9267 if (req->key && req->key_len) { 9268 auth_data->key_len = req->key_len; 9269 auth_data->key_idx = req->key_idx; 9270 memcpy(auth_data->key, req->key, req->key_len); 9271 } 9272 9273 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9274 req->supported_selectors, 9275 req->supported_selectors_len); 9276 9277 auth_data->algorithm = auth_alg; 9278 9279 /* try to authenticate/probe */ 9280 9281 if (ifmgd->auth_data) { 9282 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9283 auth_data->peer_confirmed = 9284 ifmgd->auth_data->peer_confirmed; 9285 } 9286 ieee80211_destroy_auth_data(sdata, cont_auth); 9287 } 9288 9289 /* prep auth_data so we don't go into idle on disassoc */ 9290 ifmgd->auth_data = auth_data; 9291 9292 /* If this is continuation of an ongoing SAE authentication exchange 9293 * (i.e., request to send SAE Confirm) and the peer has already 9294 * confirmed, mark authentication completed since we are about to send 9295 * out SAE Confirm. 9296 */ 9297 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9298 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9299 ieee80211_mark_sta_auth(sdata); 9300 9301 if (ifmgd->associated) { 9302 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9303 9304 sdata_info(sdata, 9305 "disconnect from AP %pM for new auth to %pM\n", 9306 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9307 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9308 WLAN_REASON_UNSPECIFIED, 9309 false, frame_buf); 9310 9311 ieee80211_report_disconnect(sdata, frame_buf, 9312 sizeof(frame_buf), true, 9313 WLAN_REASON_UNSPECIFIED, 9314 false); 9315 } 9316 9317 /* needed for transmitting the auth frame(s) properly */ 9318 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9319 9320 bss = (void *)req->bss->priv; 9321 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9322 9323 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9324 9325 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9326 &conn); 9327 9328 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9329 req->ap_mld_addr, cont_auth, 9330 &conn, false, 9331 auth_data->userspace_selectors); 9332 if (err) 9333 goto err_clear; 9334 9335 if (req->link_id >= 0) 9336 link = sdata_dereference(sdata->link[req->link_id], sdata); 9337 else 9338 link = &sdata->deflink; 9339 9340 if (WARN_ON(!link)) { 9341 err = -ENOLINK; 9342 goto err_clear; 9343 } 9344 9345 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9346 auth_data->ap_addr, link->conf->addr); 9347 9348 err = ieee80211_auth(sdata); 9349 if (err) { 9350 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9351 goto err_clear; 9352 } 9353 9354 /* hold our own reference */ 9355 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9356 return 0; 9357 9358 err_clear: 9359 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9360 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9361 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9362 BSS_CHANGED_BSSID); 9363 ieee80211_link_release_channel(&sdata->deflink); 9364 } 9365 ifmgd->auth_data = NULL; 9366 kfree(auth_data); 9367 return err; 9368 } 9369 9370 static void 9371 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9372 struct ieee80211_mgd_assoc_data *assoc_data, 9373 struct cfg80211_assoc_request *req, 9374 struct ieee80211_conn_settings *conn, 9375 unsigned int link_id) 9376 { 9377 struct ieee80211_local *local = sdata->local; 9378 const struct cfg80211_bss_ies *bss_ies; 9379 struct ieee80211_supported_band *sband; 9380 struct ieee80211_link_data *link; 9381 struct cfg80211_bss *cbss; 9382 struct ieee80211_bss *bss; 9383 9384 cbss = assoc_data->link[link_id].bss; 9385 if (WARN_ON(!cbss)) 9386 return; 9387 9388 bss = (void *)cbss->priv; 9389 9390 sband = local->hw.wiphy->bands[cbss->channel->band]; 9391 if (WARN_ON(!sband)) 9392 return; 9393 9394 link = sdata_dereference(sdata->link[link_id], sdata); 9395 if (WARN_ON(!link)) 9396 return; 9397 9398 /* for MLO connections assume advertising all rates is OK */ 9399 if (!req->ap_mld_addr) { 9400 assoc_data->supp_rates = bss->supp_rates; 9401 assoc_data->supp_rates_len = bss->supp_rates_len; 9402 } 9403 9404 /* copy and link elems for the STA profile */ 9405 if (req->links[link_id].elems_len) { 9406 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9407 req->links[link_id].elems_len); 9408 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9409 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9410 assoc_data->ie_pos += req->links[link_id].elems_len; 9411 } 9412 9413 link->u.mgd.beacon_crc_valid = false; 9414 link->u.mgd.dtim_period = 0; 9415 link->u.mgd.have_beacon = false; 9416 9417 /* override HT configuration only if the AP and we support it */ 9418 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9419 struct ieee80211_sta_ht_cap sta_ht_cap; 9420 9421 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9422 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9423 } 9424 9425 rcu_read_lock(); 9426 bss_ies = rcu_dereference(cbss->beacon_ies); 9427 if (bss_ies) { 9428 u8 dtim_count = 0; 9429 9430 ieee80211_get_dtim(bss_ies, &dtim_count, 9431 &link->u.mgd.dtim_period); 9432 9433 sdata->deflink.u.mgd.have_beacon = true; 9434 9435 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9436 link->conf->sync_tsf = bss_ies->tsf; 9437 link->conf->sync_device_ts = bss->device_ts_beacon; 9438 link->conf->sync_dtim_count = dtim_count; 9439 } 9440 } else { 9441 bss_ies = rcu_dereference(cbss->ies); 9442 } 9443 9444 if (bss_ies) { 9445 const struct element *elem; 9446 9447 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9448 bss_ies->data, bss_ies->len); 9449 if (elem && elem->datalen >= 3) 9450 link->conf->profile_periodicity = elem->data[2]; 9451 else 9452 link->conf->profile_periodicity = 0; 9453 9454 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9455 bss_ies->data, bss_ies->len); 9456 if (elem && elem->datalen >= 11 && 9457 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9458 link->conf->ema_ap = true; 9459 else 9460 link->conf->ema_ap = false; 9461 } 9462 rcu_read_unlock(); 9463 9464 if (bss->corrupt_data) { 9465 char *corrupt_type = "data"; 9466 9467 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9468 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9469 corrupt_type = "beacon and probe response"; 9470 else 9471 corrupt_type = "beacon"; 9472 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9473 corrupt_type = "probe response"; 9474 } 9475 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9476 cbss->bssid, corrupt_type); 9477 } 9478 9479 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9480 if (sdata->u.mgd.powersave) 9481 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9482 else 9483 link->smps_mode = IEEE80211_SMPS_OFF; 9484 } else { 9485 link->smps_mode = link->u.mgd.req_smps; 9486 } 9487 } 9488 9489 static int 9490 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9491 struct ieee80211_mgd_assoc_data *assoc_data, 9492 int link_id) 9493 { 9494 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9495 enum nl80211_band band = cbss->channel->band; 9496 struct ieee80211_supported_band *sband; 9497 const struct element *elem; 9498 int err; 9499 9500 /* neither HT nor VHT elements used on 6 GHz */ 9501 if (band == NL80211_BAND_6GHZ) 9502 return 0; 9503 9504 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9505 return 0; 9506 9507 rcu_read_lock(); 9508 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9509 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9510 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9511 cbss->bssid); 9512 err = -EINVAL; 9513 goto out_rcu; 9514 } 9515 assoc_data->link[link_id].ap_ht_param = 9516 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9517 rcu_read_unlock(); 9518 9519 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9520 return 0; 9521 9522 /* some drivers want to support VHT on 2.4 GHz even */ 9523 sband = sdata->local->hw.wiphy->bands[band]; 9524 if (!sband->vht_cap.vht_supported) 9525 return 0; 9526 9527 rcu_read_lock(); 9528 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9529 /* but even then accept it not being present on the AP */ 9530 if (!elem && band == NL80211_BAND_2GHZ) { 9531 err = 0; 9532 goto out_rcu; 9533 } 9534 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9535 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9536 cbss->bssid); 9537 err = -EINVAL; 9538 goto out_rcu; 9539 } 9540 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9541 sizeof(struct ieee80211_vht_cap)); 9542 rcu_read_unlock(); 9543 9544 return 0; 9545 out_rcu: 9546 rcu_read_unlock(); 9547 return err; 9548 } 9549 9550 static bool 9551 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9552 { 9553 const struct cfg80211_bss_ies *ies; 9554 struct cfg80211_bss *bss; 9555 const struct element *ml; 9556 9557 /* not an MLO connection if link_id < 0, so irrelevant */ 9558 if (req->link_id < 0) 9559 return false; 9560 9561 bss = req->links[req->link_id].bss; 9562 9563 guard(rcu)(); 9564 ies = rcu_dereference(bss->ies); 9565 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9566 ies->data, ies->len) { 9567 const struct ieee80211_multi_link_elem *mle; 9568 9569 if (!ieee80211_mle_type_ok(ml->data + 1, 9570 IEEE80211_ML_CONTROL_TYPE_BASIC, 9571 ml->datalen - 1)) 9572 continue; 9573 9574 mle = (void *)(ml->data + 1); 9575 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9576 return true; 9577 } 9578 9579 return false; 9580 9581 } 9582 9583 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9584 struct cfg80211_assoc_request *req) 9585 { 9586 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9587 struct ieee80211_local *local = sdata->local; 9588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9589 struct ieee80211_mgd_assoc_data *assoc_data; 9590 const struct element *ssid_elem; 9591 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9592 struct ieee80211_link_data *link; 9593 struct cfg80211_bss *cbss; 9594 bool override, uapsd_supported; 9595 bool match_auth; 9596 int i, err; 9597 size_t size = sizeof(*assoc_data) + req->ie_len; 9598 9599 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9600 size += req->links[i].elems_len; 9601 9602 /* FIXME: no support for 4-addr MLO yet */ 9603 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9604 return -EOPNOTSUPP; 9605 9606 assoc_data = kzalloc(size, GFP_KERNEL); 9607 if (!assoc_data) 9608 return -ENOMEM; 9609 9610 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9611 9612 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9613 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9614 err = -EINVAL; 9615 goto err_free; 9616 } 9617 9618 rcu_read_lock(); 9619 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9620 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9621 rcu_read_unlock(); 9622 err = -EINVAL; 9623 goto err_free; 9624 } 9625 9626 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9627 assoc_data->ssid_len = ssid_elem->datalen; 9628 rcu_read_unlock(); 9629 9630 if (req->ap_mld_addr) 9631 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9632 else 9633 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9634 9635 /* 9636 * Many APs have broken parsing of the extended MLD capa/ops field, 9637 * dropping (re-)association request frames or replying with association 9638 * response with a failure status if it's present. 9639 * Set our value from the userspace request only in strict mode or if 9640 * the AP also had that field present. 9641 */ 9642 if (ieee80211_hw_check(&local->hw, STRICT) || 9643 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9644 assoc_data->ext_mld_capa_ops = 9645 cpu_to_le16(req->ext_mld_capa_ops); 9646 9647 if (ifmgd->associated) { 9648 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9649 9650 sdata_info(sdata, 9651 "disconnect from AP %pM for new assoc to %pM\n", 9652 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9653 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9654 WLAN_REASON_UNSPECIFIED, 9655 false, frame_buf); 9656 9657 ieee80211_report_disconnect(sdata, frame_buf, 9658 sizeof(frame_buf), true, 9659 WLAN_REASON_UNSPECIFIED, 9660 false); 9661 } 9662 9663 memset(sdata->u.mgd.userspace_selectors, 0, 9664 sizeof(sdata->u.mgd.userspace_selectors)); 9665 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9666 req->supported_selectors, 9667 req->supported_selectors_len); 9668 9669 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9670 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9671 sizeof(ifmgd->ht_capa_mask)); 9672 9673 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9674 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9675 sizeof(ifmgd->vht_capa_mask)); 9676 9677 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9678 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9679 sizeof(ifmgd->s1g_capa_mask)); 9680 9681 /* keep some setup (AP STA, channel, ...) if matching */ 9682 match_auth = ifmgd->auth_data && 9683 ether_addr_equal(ifmgd->auth_data->ap_addr, 9684 assoc_data->ap_addr) && 9685 ifmgd->auth_data->link_id == req->link_id; 9686 9687 if (req->ap_mld_addr) { 9688 uapsd_supported = true; 9689 9690 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9691 ASSOC_REQ_DISABLE_VHT | 9692 ASSOC_REQ_DISABLE_HE | 9693 ASSOC_REQ_DISABLE_EHT)) { 9694 err = -EINVAL; 9695 goto err_free; 9696 } 9697 9698 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9699 struct ieee80211_supported_band *sband; 9700 struct cfg80211_bss *link_cbss = req->links[i].bss; 9701 struct ieee80211_bss *bss; 9702 9703 if (!link_cbss) 9704 continue; 9705 9706 bss = (void *)link_cbss->priv; 9707 9708 if (!bss->wmm_used) { 9709 err = -EINVAL; 9710 req->links[i].error = err; 9711 goto err_free; 9712 } 9713 9714 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9715 err = -EINVAL; 9716 req->links[i].error = err; 9717 goto err_free; 9718 } 9719 9720 link = sdata_dereference(sdata->link[i], sdata); 9721 if (link) 9722 ether_addr_copy(assoc_data->link[i].addr, 9723 link->conf->addr); 9724 else 9725 eth_random_addr(assoc_data->link[i].addr); 9726 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9727 9728 if (match_auth && i == assoc_link_id && link) 9729 assoc_data->link[i].conn = link->u.mgd.conn; 9730 else 9731 assoc_data->link[i].conn = 9732 ieee80211_conn_settings_unlimited; 9733 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9734 req, true, i, 9735 &assoc_data->link[i].conn); 9736 assoc_data->link[i].bss = link_cbss; 9737 assoc_data->link[i].disabled = req->links[i].disabled; 9738 9739 if (!bss->uapsd_supported) 9740 uapsd_supported = false; 9741 9742 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9743 err = -EINVAL; 9744 req->links[i].error = err; 9745 goto err_free; 9746 } 9747 9748 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9749 assoc_data, i); 9750 if (err) { 9751 err = -EINVAL; 9752 req->links[i].error = err; 9753 goto err_free; 9754 } 9755 } 9756 9757 assoc_data->wmm = true; 9758 } else { 9759 struct ieee80211_supported_band *sband; 9760 struct ieee80211_bss *bss = (void *)cbss->priv; 9761 9762 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9763 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9764 9765 assoc_data->wmm = bss->wmm_used && 9766 (local->hw.queues >= IEEE80211_NUM_ACS); 9767 9768 if (cbss->channel->band == NL80211_BAND_6GHZ && 9769 req->flags & (ASSOC_REQ_DISABLE_HT | 9770 ASSOC_REQ_DISABLE_VHT | 9771 ASSOC_REQ_DISABLE_HE)) { 9772 err = -EINVAL; 9773 goto err_free; 9774 } 9775 9776 sband = local->hw.wiphy->bands[cbss->channel->band]; 9777 9778 assoc_data->link[0].bss = cbss; 9779 9780 if (match_auth) 9781 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9782 else 9783 assoc_data->link[0].conn = 9784 ieee80211_conn_settings_unlimited; 9785 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9786 assoc_data->wmm, 0, 9787 &assoc_data->link[0].conn); 9788 9789 uapsd_supported = bss->uapsd_supported; 9790 9791 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9792 if (err) 9793 goto err_free; 9794 } 9795 9796 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9797 9798 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9799 err = -EBUSY; 9800 goto err_free; 9801 } 9802 9803 if (ifmgd->assoc_data) { 9804 err = -EBUSY; 9805 goto err_free; 9806 } 9807 9808 /* Cleanup is delayed if auth_data matches */ 9809 if (ifmgd->auth_data && !match_auth) 9810 ieee80211_destroy_auth_data(sdata, false); 9811 9812 if (req->ie && req->ie_len) { 9813 memcpy(assoc_data->ie, req->ie, req->ie_len); 9814 assoc_data->ie_len = req->ie_len; 9815 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9816 } else { 9817 assoc_data->ie_pos = assoc_data->ie; 9818 } 9819 9820 if (req->fils_kek) { 9821 /* should already be checked in cfg80211 - so warn */ 9822 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9823 err = -EINVAL; 9824 goto err_free; 9825 } 9826 memcpy(assoc_data->fils_kek, req->fils_kek, 9827 req->fils_kek_len); 9828 assoc_data->fils_kek_len = req->fils_kek_len; 9829 } 9830 9831 if (req->fils_nonces) 9832 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9833 2 * FILS_NONCE_LEN); 9834 9835 /* default timeout */ 9836 assoc_data->timeout = jiffies; 9837 assoc_data->timeout_started = true; 9838 9839 assoc_data->assoc_link_id = assoc_link_id; 9840 9841 if (req->ap_mld_addr) { 9842 /* if there was no authentication, set up the link */ 9843 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9844 if (err) 9845 goto err_clear; 9846 } 9847 9848 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9849 if (WARN_ON(!link)) { 9850 err = -EINVAL; 9851 goto err_clear; 9852 } 9853 9854 override = link->u.mgd.conn.mode != 9855 assoc_data->link[assoc_link_id].conn.mode || 9856 link->u.mgd.conn.bw_limit != 9857 assoc_data->link[assoc_link_id].conn.bw_limit; 9858 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9859 9860 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9861 assoc_link_id); 9862 9863 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9864 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9865 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9866 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9867 9868 if (assoc_data->wmm && uapsd_supported && 9869 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9870 assoc_data->uapsd = true; 9871 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9872 } else { 9873 assoc_data->uapsd = false; 9874 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9875 } 9876 9877 if (req->prev_bssid) 9878 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9879 9880 if (req->use_mfp) { 9881 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9882 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9883 } else { 9884 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9885 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9886 } 9887 9888 if (req->flags & ASSOC_REQ_USE_RRM) 9889 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9890 else 9891 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9892 9893 if (req->crypto.control_port) 9894 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9895 else 9896 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9897 9898 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9899 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9900 sdata->control_port_over_nl80211 = 9901 req->crypto.control_port_over_nl80211; 9902 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9903 9904 /* kick off associate process */ 9905 ifmgd->assoc_data = assoc_data; 9906 9907 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9908 if (!assoc_data->link[i].bss) 9909 continue; 9910 if (i == assoc_data->assoc_link_id) 9911 continue; 9912 /* only calculate the mode, hence link == NULL */ 9913 err = ieee80211_prep_channel(sdata, NULL, i, 9914 assoc_data->link[i].bss, true, 9915 &assoc_data->link[i].conn, 9916 sdata->u.mgd.userspace_selectors); 9917 if (err) { 9918 req->links[i].error = err; 9919 goto err_clear; 9920 } 9921 } 9922 9923 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9924 vif_cfg->ssid_len = assoc_data->ssid_len; 9925 9926 /* needed for transmitting the assoc frames properly */ 9927 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9928 9929 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9930 req->ap_mld_addr, true, 9931 &assoc_data->link[assoc_link_id].conn, 9932 override, 9933 sdata->u.mgd.userspace_selectors); 9934 if (err) 9935 goto err_clear; 9936 9937 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9938 const struct cfg80211_bss_ies *beacon_ies; 9939 9940 rcu_read_lock(); 9941 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9942 if (!beacon_ies) { 9943 /* 9944 * Wait up to one beacon interval ... 9945 * should this be more if we miss one? 9946 */ 9947 sdata_info(sdata, "waiting for beacon from %pM\n", 9948 link->u.mgd.bssid); 9949 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9950 assoc_data->timeout_started = true; 9951 assoc_data->need_beacon = true; 9952 } 9953 rcu_read_unlock(); 9954 } 9955 9956 run_again(sdata, assoc_data->timeout); 9957 9958 /* We are associating, clean up auth_data */ 9959 if (ifmgd->auth_data) 9960 ieee80211_destroy_auth_data(sdata, true); 9961 9962 return 0; 9963 err_clear: 9964 if (!ifmgd->auth_data) { 9965 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9966 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9967 BSS_CHANGED_BSSID); 9968 } 9969 ifmgd->assoc_data = NULL; 9970 err_free: 9971 kfree(assoc_data); 9972 return err; 9973 } 9974 9975 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9976 struct cfg80211_deauth_request *req) 9977 { 9978 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9979 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9980 bool tx = !req->local_state_change; 9981 struct ieee80211_prep_tx_info info = { 9982 .subtype = IEEE80211_STYPE_DEAUTH, 9983 }; 9984 9985 if (ifmgd->auth_data && 9986 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9987 sdata_info(sdata, 9988 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9989 req->bssid, req->reason_code, 9990 ieee80211_get_reason_code_string(req->reason_code)); 9991 9992 info.link_id = ifmgd->auth_data->link_id; 9993 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9994 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9995 IEEE80211_STYPE_DEAUTH, 9996 req->reason_code, tx, 9997 frame_buf); 9998 ieee80211_destroy_auth_data(sdata, false); 9999 ieee80211_report_disconnect(sdata, frame_buf, 10000 sizeof(frame_buf), true, 10001 req->reason_code, false); 10002 drv_mgd_complete_tx(sdata->local, sdata, &info); 10003 return 0; 10004 } 10005 10006 if (ifmgd->assoc_data && 10007 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10008 sdata_info(sdata, 10009 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10010 req->bssid, req->reason_code, 10011 ieee80211_get_reason_code_string(req->reason_code)); 10012 10013 info.link_id = ifmgd->assoc_data->assoc_link_id; 10014 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10015 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10016 IEEE80211_STYPE_DEAUTH, 10017 req->reason_code, tx, 10018 frame_buf); 10019 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10020 ieee80211_report_disconnect(sdata, frame_buf, 10021 sizeof(frame_buf), true, 10022 req->reason_code, false); 10023 drv_mgd_complete_tx(sdata->local, sdata, &info); 10024 return 0; 10025 } 10026 10027 if (ifmgd->associated && 10028 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10029 sdata_info(sdata, 10030 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10031 req->bssid, req->reason_code, 10032 ieee80211_get_reason_code_string(req->reason_code)); 10033 10034 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10035 req->reason_code, tx, frame_buf); 10036 ieee80211_report_disconnect(sdata, frame_buf, 10037 sizeof(frame_buf), true, 10038 req->reason_code, false); 10039 return 0; 10040 } 10041 10042 return -ENOTCONN; 10043 } 10044 10045 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10046 struct cfg80211_disassoc_request *req) 10047 { 10048 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10049 10050 if (!sdata->u.mgd.associated || 10051 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10052 return -ENOTCONN; 10053 10054 sdata_info(sdata, 10055 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10056 req->ap_addr, req->reason_code, 10057 ieee80211_get_reason_code_string(req->reason_code)); 10058 10059 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10060 req->reason_code, !req->local_state_change, 10061 frame_buf); 10062 10063 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10064 req->reason_code, false); 10065 10066 return 0; 10067 } 10068 10069 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10070 { 10071 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10072 &link->u.mgd.request_smps_work); 10073 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10074 &link->u.mgd.recalc_smps); 10075 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10076 &link->u.mgd.csa.switch_work); 10077 } 10078 10079 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10080 { 10081 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10082 10083 /* 10084 * Make sure some work items will not run after this, 10085 * they will not do anything but might not have been 10086 * cancelled when disconnecting. 10087 */ 10088 wiphy_work_cancel(sdata->local->hw.wiphy, 10089 &ifmgd->monitor_work); 10090 wiphy_work_cancel(sdata->local->hw.wiphy, 10091 &ifmgd->beacon_connection_loss_work); 10092 wiphy_work_cancel(sdata->local->hw.wiphy, 10093 &ifmgd->csa_connection_drop_work); 10094 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10095 &ifmgd->tdls_peer_del_work); 10096 10097 if (ifmgd->assoc_data) 10098 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10099 if (ifmgd->auth_data) 10100 ieee80211_destroy_auth_data(sdata, false); 10101 spin_lock_bh(&ifmgd->teardown_lock); 10102 if (ifmgd->teardown_skb) { 10103 kfree_skb(ifmgd->teardown_skb); 10104 ifmgd->teardown_skb = NULL; 10105 ifmgd->orig_teardown_skb = NULL; 10106 } 10107 kfree(ifmgd->assoc_req_ies); 10108 ifmgd->assoc_req_ies = NULL; 10109 ifmgd->assoc_req_ies_len = 0; 10110 spin_unlock_bh(&ifmgd->teardown_lock); 10111 timer_delete_sync(&ifmgd->timer); 10112 } 10113 10114 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10115 enum nl80211_cqm_rssi_threshold_event rssi_event, 10116 s32 rssi_level, 10117 gfp_t gfp) 10118 { 10119 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10120 10121 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10122 10123 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10124 } 10125 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10126 10127 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10128 { 10129 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10130 10131 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10132 10133 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10134 } 10135 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10136 10137 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10138 int rssi_min_thold, 10139 int rssi_max_thold) 10140 { 10141 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10142 10143 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10144 return; 10145 10146 /* 10147 * Scale up threshold values before storing it, as the RSSI averaging 10148 * algorithm uses a scaled up value as well. Change this scaling 10149 * factor if the RSSI averaging algorithm changes. 10150 */ 10151 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10152 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10153 } 10154 10155 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10156 int rssi_min_thold, 10157 int rssi_max_thold) 10158 { 10159 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10160 10161 WARN_ON(rssi_min_thold == rssi_max_thold || 10162 rssi_min_thold > rssi_max_thold); 10163 10164 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10165 rssi_max_thold); 10166 } 10167 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10168 10169 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10170 { 10171 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10172 10173 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10174 } 10175 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10176 10177 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10178 struct ieee80211_mgmt *mgmt, size_t len) 10179 { 10180 struct ieee80211_local *local = sdata->local; 10181 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10182 struct ieee80211_mgd_assoc_data *add_links_data = 10183 ifmgd->reconf.add_links_data; 10184 struct sta_info *sta; 10185 struct cfg80211_mlo_reconf_done_data done_data = {}; 10186 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10187 sdata->u.mgd.reconf.removed_links; 10188 u16 link_mask, valid_links; 10189 unsigned int link_id; 10190 size_t orig_len = len; 10191 u8 i, group_key_data_len; 10192 u8 *pos; 10193 10194 if (!ieee80211_vif_is_mld(&sdata->vif) || 10195 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10196 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10197 sdata->u.mgd.reconf.dialog_token || 10198 !sta_changed_links) 10199 return; 10200 10201 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10202 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10203 10204 /* each status duple is 3 octets */ 10205 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10206 sdata_info(sdata, 10207 "mlo: reconf: unexpected len=%zu, count=%u\n", 10208 len, mgmt->u.action.u.ml_reconf_resp.count); 10209 goto disconnect; 10210 } 10211 10212 link_mask = sta_changed_links; 10213 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10214 u16 status = get_unaligned_le16(pos + 1); 10215 10216 link_id = *pos; 10217 10218 if (!(link_mask & BIT(link_id))) { 10219 sdata_info(sdata, 10220 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10221 link_id, sta_changed_links); 10222 goto disconnect; 10223 } 10224 10225 /* clear the corresponding link, to detect the case that 10226 * the same link was included more than one time 10227 */ 10228 link_mask &= ~BIT(link_id); 10229 10230 /* Handle failure to remove links here. Failure to remove added 10231 * links will be done later in the flow. 10232 */ 10233 if (status != WLAN_STATUS_SUCCESS) { 10234 sdata_info(sdata, 10235 "mlo: reconf: failed on link=%u, status=%u\n", 10236 link_id, status); 10237 10238 /* The AP MLD failed to remove a link that was already 10239 * removed locally. As this is not expected behavior, 10240 * disconnect 10241 */ 10242 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10243 goto disconnect; 10244 10245 /* The AP MLD failed to add a link. Remove it from the 10246 * added links. 10247 */ 10248 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10249 } 10250 10251 pos += 3; 10252 len -= 3; 10253 } 10254 10255 if (link_mask) { 10256 sdata_info(sdata, 10257 "mlo: reconf: no response for links=0x%x\n", 10258 link_mask); 10259 goto disconnect; 10260 } 10261 10262 if (!sdata->u.mgd.reconf.added_links) 10263 goto out; 10264 10265 if (len < 1 || len < 1 + *pos) { 10266 sdata_info(sdata, 10267 "mlo: reconf: invalid group key data length"); 10268 goto disconnect; 10269 } 10270 10271 /* The Group Key Data field must be present when links are added. This 10272 * field should be processed by userland. 10273 */ 10274 group_key_data_len = *pos++; 10275 10276 pos += group_key_data_len; 10277 len -= group_key_data_len + 1; 10278 10279 /* Process the information for the added links */ 10280 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10281 if (WARN_ON(!sta)) 10282 goto disconnect; 10283 10284 valid_links = sdata->vif.valid_links; 10285 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10286 if (!add_links_data->link[link_id].bss || 10287 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10288 continue; 10289 10290 valid_links |= BIT(link_id); 10291 if (ieee80211_sta_allocate_link(sta, link_id)) 10292 goto disconnect; 10293 } 10294 10295 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10296 link_mask = 0; 10297 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10298 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10299 struct ieee80211_link_data *link; 10300 struct link_sta_info *link_sta; 10301 u64 changed = 0; 10302 10303 if (!cbss) 10304 continue; 10305 10306 link = sdata_dereference(sdata->link[link_id], sdata); 10307 if (WARN_ON(!link)) 10308 goto disconnect; 10309 10310 link_info(link, 10311 "mlo: reconf: local address %pM, AP link address %pM\n", 10312 add_links_data->link[link_id].addr, 10313 add_links_data->link[link_id].bss->bssid); 10314 10315 link_sta = rcu_dereference_protected(sta->link[link_id], 10316 lockdep_is_held(&local->hw.wiphy->mtx)); 10317 if (WARN_ON(!link_sta)) 10318 goto disconnect; 10319 10320 if (!link->u.mgd.have_beacon) { 10321 const struct cfg80211_bss_ies *ies; 10322 10323 rcu_read_lock(); 10324 ies = rcu_dereference(cbss->beacon_ies); 10325 if (ies) 10326 link->u.mgd.have_beacon = true; 10327 else 10328 ies = rcu_dereference(cbss->ies); 10329 ieee80211_get_dtim(ies, 10330 &link->conf->sync_dtim_count, 10331 &link->u.mgd.dtim_period); 10332 link->conf->beacon_int = cbss->beacon_interval; 10333 rcu_read_unlock(); 10334 } 10335 10336 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10337 10338 link->u.mgd.conn = add_links_data->link[link_id].conn; 10339 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10340 true, &link->u.mgd.conn, 10341 sdata->u.mgd.userspace_selectors)) { 10342 link_info(link, "mlo: reconf: prep_channel failed\n"); 10343 goto disconnect; 10344 } 10345 10346 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10347 add_links_data->link[link_id].bss)) 10348 goto disconnect; 10349 10350 if (!ieee80211_assoc_config_link(link, link_sta, 10351 add_links_data->link[link_id].bss, 10352 mgmt, pos, len, 10353 &changed)) 10354 goto disconnect; 10355 10356 /* The AP MLD indicated success for this link, but the station 10357 * profile status indicated otherwise. Since there is an 10358 * inconsistency in the ML reconfiguration response, disconnect 10359 */ 10360 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10361 goto disconnect; 10362 10363 ieee80211_sta_init_nss(link_sta); 10364 if (ieee80211_sta_activate_link(sta, link_id)) 10365 goto disconnect; 10366 10367 changed |= ieee80211_link_set_associated(link, cbss); 10368 ieee80211_link_info_change_notify(sdata, link, changed); 10369 10370 ieee80211_recalc_smps(sdata, link); 10371 link_mask |= BIT(link_id); 10372 } 10373 10374 sdata_info(sdata, 10375 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10376 valid_links, link_mask); 10377 10378 /* links might have changed due to rejected ones, set them again */ 10379 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10380 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10381 10382 ieee80211_recalc_ps(local); 10383 ieee80211_recalc_ps_vif(sdata); 10384 10385 done_data.buf = (const u8 *)mgmt; 10386 done_data.len = orig_len; 10387 done_data.added_links = link_mask; 10388 10389 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10390 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10391 done_data.links[link_id].addr = 10392 add_links_data->link[link_id].addr; 10393 } 10394 10395 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10396 kfree(sdata->u.mgd.reconf.add_links_data); 10397 sdata->u.mgd.reconf.add_links_data = NULL; 10398 out: 10399 ieee80211_ml_reconf_reset(sdata); 10400 return; 10401 10402 disconnect: 10403 __ieee80211_disconnect(sdata); 10404 } 10405 10406 static struct sk_buff * 10407 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10408 struct ieee80211_mgd_assoc_data *add_links_data, 10409 u16 removed_links, __le16 ext_mld_capa_ops) 10410 { 10411 struct ieee80211_local *local = sdata->local; 10412 struct ieee80211_mgmt *mgmt; 10413 struct ieee80211_multi_link_elem *ml_elem; 10414 struct ieee80211_mle_basic_common_info *common; 10415 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10416 struct sk_buff *skb; 10417 size_t size; 10418 unsigned int link_id; 10419 __le16 eml_capa = 0, mld_capa_ops = 0; 10420 struct ieee80211_tx_info *info; 10421 u8 common_size, var_common_size; 10422 u8 *ml_elem_len; 10423 u16 capab = 0; 10424 10425 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10426 10427 /* Consider the maximal length of the reconfiguration ML element */ 10428 size += sizeof(struct ieee80211_multi_link_elem); 10429 10430 /* The Basic ML element and the Reconfiguration ML element have the same 10431 * fixed common information fields in the context of ML reconfiguration 10432 * action frame. The AP MLD MAC address must always be present 10433 */ 10434 common_size = sizeof(*common); 10435 10436 /* when adding links, the MLD capabilities must be present */ 10437 var_common_size = 0; 10438 if (add_links_data) { 10439 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10440 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10441 ieee80211_vif_type_p2p(&sdata->vif)); 10442 10443 if (ift_ext_capa) { 10444 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10445 mld_capa_ops = 10446 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10447 } 10448 10449 /* MLD capabilities and operation */ 10450 var_common_size += 2; 10451 10452 /* EML capabilities */ 10453 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10454 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10455 var_common_size += 2; 10456 } 10457 10458 if (ext_mld_capa_ops) 10459 var_common_size += 2; 10460 10461 /* Add the common information length */ 10462 size += common_size + var_common_size; 10463 10464 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10465 struct cfg80211_bss *cbss; 10466 size_t elems_len; 10467 10468 if (removed_links & BIT(link_id)) { 10469 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10470 ETH_ALEN; 10471 continue; 10472 } 10473 10474 if (!add_links_data || !add_links_data->link[link_id].bss) 10475 continue; 10476 10477 elems_len = add_links_data->link[link_id].elems_len; 10478 cbss = add_links_data->link[link_id].bss; 10479 10480 /* should be the same across all BSSes */ 10481 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10482 capab |= WLAN_CAPABILITY_PRIVACY; 10483 10484 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10485 ETH_ALEN; 10486 10487 /* WMM */ 10488 size += 9; 10489 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10490 elems_len); 10491 } 10492 10493 skb = alloc_skb(size, GFP_KERNEL); 10494 if (!skb) 10495 return NULL; 10496 10497 skb_reserve(skb, local->hw.extra_tx_headroom); 10498 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10499 u.action.u.ml_reconf_req)); 10500 10501 /* Add the MAC header */ 10502 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10503 IEEE80211_STYPE_ACTION); 10504 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10505 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10506 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10507 10508 /* Add the action frame fixed fields */ 10509 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10510 mgmt->u.action.u.ml_reconf_req.action_code = 10511 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10512 10513 /* allocate a dialog token and store it */ 10514 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10515 mgmt->u.action.u.ml_reconf_req.dialog_token = 10516 sdata->u.mgd.reconf.dialog_token; 10517 10518 /* Add the ML reconfiguration element and the common information */ 10519 skb_put_u8(skb, WLAN_EID_EXTENSION); 10520 ml_elem_len = skb_put(skb, 1); 10521 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10522 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10523 ml_elem->control = 10524 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10525 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10526 common = skb_put(skb, common_size); 10527 common->len = common_size + var_common_size; 10528 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10529 10530 if (add_links_data) { 10531 if (eml_capa & 10532 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10533 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10534 ml_elem->control |= 10535 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10536 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10537 } 10538 10539 ml_elem->control |= 10540 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10541 10542 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10543 } 10544 10545 if (ext_mld_capa_ops) { 10546 ml_elem->control |= 10547 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10548 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10549 } 10550 10551 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10552 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10553 10554 /* Add the per station profile */ 10555 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10556 u8 *subelem_len = NULL; 10557 u16 ctrl; 10558 const u8 *addr; 10559 10560 /* Skip links that are not changing */ 10561 if (!(removed_links & BIT(link_id)) && 10562 (!add_links_data || !add_links_data->link[link_id].bss)) 10563 continue; 10564 10565 ctrl = link_id | 10566 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10567 10568 if (removed_links & BIT(link_id)) { 10569 struct ieee80211_bss_conf *conf = 10570 sdata_dereference(sdata->vif.link_conf[link_id], 10571 sdata); 10572 if (!conf) 10573 continue; 10574 10575 addr = conf->addr; 10576 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10577 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10578 } else { 10579 addr = add_links_data->link[link_id].addr; 10580 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10581 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10582 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10583 } 10584 10585 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10586 subelem_len = skb_put(skb, 1); 10587 10588 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10589 skb_put_u8(skb, 1 + ETH_ALEN); 10590 skb_put_data(skb, addr, ETH_ALEN); 10591 10592 if (!(removed_links & BIT(link_id))) { 10593 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10594 size_t extra_used; 10595 void *capab_pos; 10596 u8 qos_info; 10597 10598 capab_pos = skb_put(skb, 2); 10599 10600 extra_used = 10601 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10602 add_links_data->link[link_id].elems, 10603 add_links_data->link[link_id].elems_len, 10604 link_id, NULL, 10605 link_present_elems, 10606 add_links_data); 10607 10608 if (add_links_data->link[link_id].elems) 10609 skb_put_data(skb, 10610 add_links_data->link[link_id].elems + 10611 extra_used, 10612 add_links_data->link[link_id].elems_len - 10613 extra_used); 10614 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10615 qos_info = sdata->u.mgd.uapsd_queues; 10616 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10617 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10618 } else { 10619 qos_info = 0; 10620 } 10621 10622 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10623 put_unaligned_le16(capab, capab_pos); 10624 } 10625 10626 ieee80211_fragment_element(skb, subelem_len, 10627 IEEE80211_MLE_SUBELEM_FRAGMENT); 10628 } 10629 10630 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10631 10632 info = IEEE80211_SKB_CB(skb); 10633 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10634 10635 return skb; 10636 } 10637 10638 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10639 struct cfg80211_ml_reconf_req *req) 10640 { 10641 struct ieee80211_local *local = sdata->local; 10642 struct ieee80211_mgd_assoc_data *data = NULL; 10643 struct sta_info *sta; 10644 struct sk_buff *skb; 10645 u16 added_links, new_valid_links; 10646 int link_id, err; 10647 10648 if (!ieee80211_vif_is_mld(&sdata->vif) || 10649 !(sdata->vif.cfg.mld_capa_op & 10650 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10651 return -EINVAL; 10652 10653 /* No support for concurrent ML reconfiguration operation */ 10654 if (sdata->u.mgd.reconf.added_links || 10655 sdata->u.mgd.reconf.removed_links) 10656 return -EBUSY; 10657 10658 added_links = 0; 10659 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10660 if (!req->add_links[link_id].bss) 10661 continue; 10662 10663 added_links |= BIT(link_id); 10664 } 10665 10666 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10667 if (WARN_ON(!sta)) 10668 return -ENOLINK; 10669 10670 /* Adding links to the set of valid link is done only after a successful 10671 * ML reconfiguration frame exchange. Here prepare the data for the ML 10672 * reconfiguration frame construction and allocate the required 10673 * resources 10674 */ 10675 if (added_links) { 10676 bool uapsd_supported; 10677 10678 data = kzalloc(sizeof(*data), GFP_KERNEL); 10679 if (!data) 10680 return -ENOMEM; 10681 10682 data->assoc_link_id = -1; 10683 data->wmm = true; 10684 10685 uapsd_supported = true; 10686 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10687 link_id++) { 10688 struct ieee80211_supported_band *sband; 10689 struct cfg80211_bss *link_cbss = 10690 req->add_links[link_id].bss; 10691 struct ieee80211_bss *bss; 10692 10693 if (!link_cbss) 10694 continue; 10695 10696 bss = (void *)link_cbss->priv; 10697 10698 if (!bss->wmm_used) { 10699 err = -EINVAL; 10700 goto err_free; 10701 } 10702 10703 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10704 err = -EINVAL; 10705 goto err_free; 10706 } 10707 10708 eth_random_addr(data->link[link_id].addr); 10709 data->link[link_id].conn = 10710 ieee80211_conn_settings_unlimited; 10711 sband = 10712 local->hw.wiphy->bands[link_cbss->channel->band]; 10713 10714 ieee80211_determine_our_sta_mode(sdata, sband, 10715 NULL, true, link_id, 10716 &data->link[link_id].conn); 10717 10718 data->link[link_id].bss = link_cbss; 10719 data->link[link_id].disabled = 10720 req->add_links[link_id].disabled; 10721 data->link[link_id].elems = 10722 (u8 *)req->add_links[link_id].elems; 10723 data->link[link_id].elems_len = 10724 req->add_links[link_id].elems_len; 10725 10726 if (!bss->uapsd_supported) 10727 uapsd_supported = false; 10728 10729 if (data->link[link_id].conn.mode < 10730 IEEE80211_CONN_MODE_EHT) { 10731 err = -EINVAL; 10732 goto err_free; 10733 } 10734 10735 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10736 link_id); 10737 if (err) { 10738 err = -EINVAL; 10739 goto err_free; 10740 } 10741 } 10742 10743 /* Require U-APSD support if we enabled it */ 10744 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10745 !uapsd_supported) { 10746 err = -EINVAL; 10747 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10748 goto err_free; 10749 } 10750 10751 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10752 link_id++) { 10753 if (!data->link[link_id].bss) 10754 continue; 10755 10756 /* only used to verify the mode, nothing is allocated */ 10757 err = ieee80211_prep_channel(sdata, NULL, link_id, 10758 data->link[link_id].bss, 10759 true, 10760 &data->link[link_id].conn, 10761 sdata->u.mgd.userspace_selectors); 10762 if (err) 10763 goto err_free; 10764 } 10765 } 10766 10767 /* link removal is done before the ML reconfiguration frame exchange so 10768 * that these links will not be used between their removal by the AP MLD 10769 * and before the station got the ML reconfiguration response. Based on 10770 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10771 * link removal request. 10772 */ 10773 if (req->rem_links) { 10774 u16 new_active_links = 10775 sdata->vif.active_links & ~req->rem_links; 10776 10777 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10778 10779 /* Should not be left with no valid links to perform the 10780 * ML reconfiguration 10781 */ 10782 if (!new_valid_links || 10783 !(new_valid_links & ~sdata->vif.dormant_links)) { 10784 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10785 err = -EINVAL; 10786 goto err_free; 10787 } 10788 10789 if (new_active_links != sdata->vif.active_links) { 10790 if (!new_active_links) 10791 new_active_links = 10792 BIT(__ffs(new_valid_links & 10793 ~sdata->vif.dormant_links)); 10794 10795 err = ieee80211_set_active_links(&sdata->vif, 10796 new_active_links); 10797 if (err) { 10798 sdata_info(sdata, 10799 "mlo: reconf: failed set active links\n"); 10800 goto err_free; 10801 } 10802 } 10803 } 10804 10805 /* Build the SKB before the link removal as the construction of the 10806 * station info for removed links requires the local address. 10807 * Invalidate the removed links, so that the transmission of the ML 10808 * reconfiguration request frame would not be done using them, as the AP 10809 * is expected to send the ML reconfiguration response frame on the link 10810 * on which the request was received. 10811 */ 10812 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10813 cpu_to_le16(req->ext_mld_capa_ops)); 10814 if (!skb) { 10815 err = -ENOMEM; 10816 goto err_free; 10817 } 10818 10819 if (req->rem_links) { 10820 u16 new_dormant_links = 10821 sdata->vif.dormant_links & ~req->rem_links; 10822 10823 err = ieee80211_vif_set_links(sdata, new_valid_links, 10824 new_dormant_links); 10825 if (err) { 10826 sdata_info(sdata, 10827 "mlo: reconf: failed set valid links\n"); 10828 kfree_skb(skb); 10829 goto err_free; 10830 } 10831 10832 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10833 link_id++) { 10834 if (!(req->rem_links & BIT(link_id))) 10835 continue; 10836 10837 ieee80211_sta_remove_link(sta, link_id); 10838 } 10839 10840 /* notify the driver and upper layers */ 10841 ieee80211_vif_cfg_change_notify(sdata, 10842 BSS_CHANGED_MLD_VALID_LINKS); 10843 cfg80211_links_removed(sdata->dev, req->rem_links); 10844 } 10845 10846 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10847 added_links, req->rem_links); 10848 10849 ieee80211_tx_skb(sdata, skb); 10850 10851 sdata->u.mgd.reconf.added_links = added_links; 10852 sdata->u.mgd.reconf.add_links_data = data; 10853 sdata->u.mgd.reconf.removed_links = req->rem_links; 10854 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10855 &sdata->u.mgd.reconf.wk, 10856 IEEE80211_ASSOC_TIMEOUT_SHORT); 10857 return 0; 10858 10859 err_free: 10860 kfree(data); 10861 return err; 10862 } 10863 10864 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10865 { 10866 unsigned long valid_links = sdata->vif.valid_links; 10867 u8 link_id; 10868 10869 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10870 10871 if (!ieee80211_vif_is_mld(&sdata->vif)) 10872 return false; 10873 10874 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10875 struct ieee80211_bss_conf *bss_conf = 10876 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10877 10878 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10879 return false; 10880 } 10881 10882 return true; 10883 } 10884 10885 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10886 { 10887 struct ieee80211_local *local = sdata->local; 10888 struct ieee80211_mgmt *mgmt; 10889 struct sk_buff *skb; 10890 int frame_len = offsetofend(struct ieee80211_mgmt, 10891 u.action.u.epcs) + (enable ? 1 : 0); 10892 10893 if (!ieee80211_mgd_epcs_supp(sdata)) 10894 return -EINVAL; 10895 10896 if (sdata->u.mgd.epcs.enabled == enable && 10897 !sdata->u.mgd.epcs.dialog_token) 10898 return 0; 10899 10900 /* Do not allow enabling EPCS if the AP didn't respond yet. 10901 * However, allow disabling EPCS in such a case. 10902 */ 10903 if (sdata->u.mgd.epcs.dialog_token && enable) 10904 return -EALREADY; 10905 10906 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10907 if (!skb) 10908 return -ENOBUFS; 10909 10910 skb_reserve(skb, local->hw.extra_tx_headroom); 10911 mgmt = skb_put_zero(skb, frame_len); 10912 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10913 IEEE80211_STYPE_ACTION); 10914 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10915 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10916 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10917 10918 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10919 if (enable) { 10920 u8 *pos = mgmt->u.action.u.epcs.variable; 10921 10922 mgmt->u.action.u.epcs.action_code = 10923 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10924 10925 *pos = ++sdata->u.mgd.dialog_token_alloc; 10926 sdata->u.mgd.epcs.dialog_token = *pos; 10927 } else { 10928 mgmt->u.action.u.epcs.action_code = 10929 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10930 10931 ieee80211_epcs_teardown(sdata); 10932 ieee80211_epcs_changed(sdata, false); 10933 } 10934 10935 ieee80211_tx_skb(sdata, skb); 10936 return 0; 10937 } 10938 10939 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10940 struct ieee802_11_elems *elems) 10941 { 10942 const struct element *sub; 10943 size_t scratch_len = elems->ml_epcs_len; 10944 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10945 10946 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10947 10948 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10949 return; 10950 10951 if (WARN_ON(!scratch)) 10952 return; 10953 10954 /* Directly parse the sub elements as the common information doesn't 10955 * hold any useful information. 10956 */ 10957 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10958 elems->ml_epcs_len) { 10959 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10960 struct ieee80211_link_data *link; 10961 u8 *pos = (void *)sub->data; 10962 u16 control; 10963 ssize_t len; 10964 u8 link_id; 10965 10966 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10967 continue; 10968 10969 if (sub->datalen < sizeof(control)) 10970 break; 10971 10972 control = get_unaligned_le16(pos); 10973 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10974 10975 link = sdata_dereference(sdata->link[link_id], sdata); 10976 if (!link) 10977 continue; 10978 10979 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10980 elems->ml_epcs_len, 10981 scratch, scratch_len, 10982 IEEE80211_MLE_SUBELEM_FRAGMENT); 10983 if (len < (ssize_t)sizeof(control)) 10984 continue; 10985 10986 pos = scratch + sizeof(control); 10987 len -= sizeof(control); 10988 10989 link_elems = ieee802_11_parse_elems(pos, len, 10990 IEEE80211_FTYPE_MGMT | 10991 IEEE80211_STYPE_ACTION, 10992 NULL); 10993 if (!link_elems) 10994 continue; 10995 10996 if (ieee80211_sta_wmm_params(sdata->local, link, 10997 link_elems->wmm_param, 10998 link_elems->wmm_param_len, 10999 link_elems->mu_edca_param_set)) 11000 ieee80211_link_info_change_notify(sdata, link, 11001 BSS_CHANGED_QOS); 11002 } 11003 } 11004 11005 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11006 struct ieee80211_mgmt *mgmt, size_t len) 11007 { 11008 struct ieee802_11_elems *elems __free(kfree) = NULL; 11009 size_t ies_len; 11010 u16 status_code; 11011 u8 *pos, dialog_token; 11012 11013 if (!ieee80211_mgd_epcs_supp(sdata)) 11014 return; 11015 11016 /* Handle dialog token and status code */ 11017 pos = mgmt->u.action.u.epcs.variable; 11018 dialog_token = *pos; 11019 status_code = get_unaligned_le16(pos + 1); 11020 11021 /* An EPCS enable response with dialog token == 0 is an unsolicited 11022 * notification from the AP MLD. In such a case, EPCS should already be 11023 * enabled and status must be success 11024 */ 11025 if (!dialog_token && 11026 (!sdata->u.mgd.epcs.enabled || 11027 status_code != WLAN_STATUS_SUCCESS)) 11028 return; 11029 11030 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11031 return; 11032 11033 sdata->u.mgd.epcs.dialog_token = 0; 11034 11035 if (status_code != WLAN_STATUS_SUCCESS) 11036 return; 11037 11038 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11039 ies_len = len - offsetof(struct ieee80211_mgmt, 11040 u.action.u.epcs.variable) - 11041 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11042 11043 elems = ieee802_11_parse_elems(pos, ies_len, 11044 IEEE80211_FTYPE_MGMT | 11045 IEEE80211_STYPE_ACTION, 11046 NULL); 11047 if (!elems) 11048 return; 11049 11050 ieee80211_ml_epcs(sdata, elems); 11051 ieee80211_epcs_changed(sdata, true); 11052 } 11053 11054 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11055 struct ieee80211_mgmt *mgmt, size_t len) 11056 { 11057 if (!ieee80211_vif_is_mld(&sdata->vif) || 11058 !sdata->u.mgd.epcs.enabled) 11059 return; 11060 11061 ieee80211_epcs_teardown(sdata); 11062 ieee80211_epcs_changed(sdata, false); 11063 } 11064