1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2026 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS (100 * USEC_PER_MSEC) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 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 const struct ieee80211_uhr_operation *uhr_oper = elems->uhr_operation; 166 struct ieee80211_supported_band *sband = 167 sdata->local->hw.wiphy->bands[channel->band]; 168 struct cfg80211_chan_def vht_chandef; 169 bool no_vht = false; 170 u32 ht_cfreq; 171 172 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 173 ignore_ht_channel_mismatch = false; 174 175 *chandef = (struct cfg80211_chan_def) { 176 .chan = channel, 177 .width = NL80211_CHAN_WIDTH_20_NOHT, 178 .center_freq1 = channel->center_freq, 179 .freq1_offset = channel->freq_offset, 180 }; 181 182 /* get special S1G case out of the way */ 183 if (sband->band == NL80211_BAND_S1GHZ) { 184 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 185 chandef)) { 186 /* Fallback to default 1MHz */ 187 chandef->width = NL80211_CHAN_WIDTH_1; 188 chandef->s1g_primary_2mhz = false; 189 } 190 191 return IEEE80211_CONN_MODE_S1G; 192 } 193 194 /* get special 6 GHz case out of the way */ 195 if (sband->band == NL80211_BAND_6GHZ) { 196 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_HIGHEST; 197 198 /* this is an error */ 199 if (conn->mode < IEEE80211_CONN_MODE_HE) 200 return IEEE80211_CONN_MODE_LEGACY; 201 202 if (!elems->he_6ghz_capa || !elems->he_cap) { 203 sdata_info(sdata, 204 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 205 return IEEE80211_CONN_MODE_LEGACY; 206 } 207 208 if (!eht_oper || !elems->eht_cap) { 209 eht_oper = NULL; 210 mode = IEEE80211_CONN_MODE_HE; 211 } 212 213 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 214 eht_oper, chandef)) { 215 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 216 return IEEE80211_CONN_MODE_LEGACY; 217 } 218 219 if (mode <= IEEE80211_CONN_MODE_EHT) 220 return mode; 221 goto check_uhr; 222 } 223 224 /* now we have the progression HT, VHT, ... */ 225 if (conn->mode < IEEE80211_CONN_MODE_HT) 226 return IEEE80211_CONN_MODE_LEGACY; 227 228 if (!ht_oper || !elems->ht_cap_elem) 229 return IEEE80211_CONN_MODE_LEGACY; 230 231 chandef->width = NL80211_CHAN_WIDTH_20; 232 233 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 234 channel->band); 235 /* check that channel matches the right operating channel */ 236 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 237 /* 238 * It's possible that some APs are confused here; 239 * Netgear WNDR3700 sometimes reports 4 higher than 240 * the actual channel in association responses, but 241 * since we look at probe response/beacon data here 242 * it should be OK. 243 */ 244 sdata_info(sdata, 245 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 246 channel->center_freq, ht_cfreq, 247 ht_oper->primary_chan, channel->band); 248 return IEEE80211_CONN_MODE_LEGACY; 249 } 250 251 ieee80211_chandef_ht_oper(ht_oper, chandef); 252 253 if (conn->mode < IEEE80211_CONN_MODE_VHT) 254 return IEEE80211_CONN_MODE_HT; 255 256 vht_chandef = *chandef; 257 258 /* 259 * having he_cap/he_oper parsed out implies we're at 260 * least operating as HE STA 261 */ 262 if (elems->he_cap && he_oper && 263 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 264 struct ieee80211_vht_operation he_oper_vht_cap; 265 266 /* 267 * Set only first 3 bytes (other 2 aren't used in 268 * ieee80211_chandef_vht_oper() anyway) 269 */ 270 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 271 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 272 273 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 274 &he_oper_vht_cap, ht_oper, 275 &vht_chandef)) { 276 sdata_info(sdata, 277 "HE AP VHT information is invalid, disabling HE\n"); 278 /* this will cause us to re-parse as VHT STA */ 279 return IEEE80211_CONN_MODE_VHT; 280 } 281 } else if (!vht_oper || !elems->vht_cap_elem) { 282 if (sband->band == NL80211_BAND_5GHZ) 283 return IEEE80211_CONN_MODE_HT; 284 no_vht = true; 285 } else if (sband->band == NL80211_BAND_2GHZ) { 286 no_vht = true; 287 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 288 vht_cap_info, 289 vht_oper, ht_oper, 290 &vht_chandef)) { 291 sdata_info(sdata, 292 "AP VHT information is invalid, disabling VHT\n"); 293 return IEEE80211_CONN_MODE_HT; 294 } 295 296 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 297 sdata_info(sdata, 298 "AP VHT information doesn't match HT, disabling VHT\n"); 299 return IEEE80211_CONN_MODE_HT; 300 } 301 302 *chandef = vht_chandef; 303 304 /* stick to current max mode if we or the AP don't have HE */ 305 if (conn->mode < IEEE80211_CONN_MODE_HE || 306 !elems->he_operation || !elems->he_cap) { 307 if (no_vht) 308 return IEEE80211_CONN_MODE_HT; 309 return IEEE80211_CONN_MODE_VHT; 310 } 311 312 /* stick to HE if we or the AP don't have EHT */ 313 if (conn->mode < IEEE80211_CONN_MODE_EHT || 314 !eht_oper || !elems->eht_cap) 315 return IEEE80211_CONN_MODE_HE; 316 317 /* 318 * handle the case that the EHT operation indicates that it holds EHT 319 * operation information (in case that the channel width differs from 320 * the channel width reported in HT/VHT/HE). 321 */ 322 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 323 struct cfg80211_chan_def eht_chandef = *chandef; 324 325 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 326 &eht_chandef); 327 328 eht_chandef.punctured = 329 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 330 331 if (!cfg80211_chandef_valid(&eht_chandef)) { 332 sdata_info(sdata, 333 "AP EHT information is invalid, disabling EHT\n"); 334 return IEEE80211_CONN_MODE_HE; 335 } 336 337 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 338 sdata_info(sdata, 339 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 340 return IEEE80211_CONN_MODE_HE; 341 } 342 343 *chandef = eht_chandef; 344 } 345 346 check_uhr: 347 if (conn->mode < IEEE80211_CONN_MODE_UHR || !uhr_oper) 348 return IEEE80211_CONN_MODE_EHT; 349 350 /* 351 * In beacons we don't have all the data - but we know the size was OK, 352 * so if the size is valid as a non-beacon case, we have more data and 353 * can validate the NPCA parameters. 354 */ 355 if (ieee80211_uhr_oper_size_ok((const void *)uhr_oper, 356 elems->uhr_operation_len, 357 false)) { 358 struct cfg80211_chan_def npca_chandef = *chandef; 359 const struct ieee80211_uhr_npca_info *npca; 360 const __le16 *dis_subch_bmap; 361 u16 punct = chandef->punctured, npca_punct; 362 363 npca = ieee80211_uhr_npca_info(uhr_oper); 364 if (npca) { 365 int width = cfg80211_chandef_get_width(chandef); 366 u8 offs = le32_get_bits(npca->params, 367 IEEE80211_UHR_NPCA_PARAMS_PRIMARY_CHAN_OFFS); 368 u32 cf1 = chandef->center_freq1; 369 bool pri_upper, npca_upper; 370 371 pri_upper = chandef->chan->center_freq > cf1; 372 npca_upper = 20 * offs >= width / 2; 373 374 if (20 * offs >= cfg80211_chandef_get_width(chandef) || 375 pri_upper == npca_upper) { 376 sdata_info(sdata, 377 "AP UHR NPCA primary channel invalid, disabling UHR\n"); 378 return IEEE80211_CONN_MODE_EHT; 379 } 380 } 381 382 dis_subch_bmap = ieee80211_uhr_npca_dis_subch_bitmap(uhr_oper); 383 384 if (dis_subch_bmap) { 385 npca_punct = get_unaligned_le16(dis_subch_bmap); 386 npca_chandef.punctured = npca_punct; 387 } 388 389 /* 390 * must be a valid puncturing pattern for this channel as 391 * well as puncturing all subchannels that are already in 392 * the disabled subchannel bitmap on the primary channel 393 */ 394 if (!cfg80211_chandef_valid(&npca_chandef) || 395 ((punct & npca_punct) != punct)) { 396 sdata_info(sdata, 397 "AP UHR NPCA disabled subchannel bitmap invalid, disabling UHR\n"); 398 return IEEE80211_CONN_MODE_EHT; 399 } 400 } 401 402 return IEEE80211_CONN_MODE_UHR; 403 } 404 405 static bool 406 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 407 struct ieee80211_supported_band *sband, 408 const struct ieee80211_ht_operation *ht_op) 409 { 410 struct ieee80211_sta_ht_cap sta_ht_cap; 411 int i; 412 413 if (sband->band == NL80211_BAND_6GHZ) 414 return true; 415 416 if (!ht_op) 417 return false; 418 419 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 420 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 421 422 /* 423 * P802.11REVme/D7.0 - 6.5.4.2.4 424 * ... 425 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 426 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 427 * in the HT Operation parameter that contains any unsupported MCSs, 428 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 429 * contain a ResultCode parameter that is not set to the value SUCCESS. 430 * ... 431 */ 432 433 /* Simply check that all basic rates are in the STA RX mask */ 434 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 435 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 436 ht_op->basic_set[i]) 437 return false; 438 } 439 440 return true; 441 } 442 443 static bool 444 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 445 int link_id, 446 struct ieee80211_supported_band *sband, 447 const struct ieee80211_vht_operation *vht_op) 448 { 449 struct ieee80211_sta_vht_cap sta_vht_cap; 450 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 451 int nss; 452 453 if (sband->band != NL80211_BAND_5GHZ) 454 return true; 455 456 if (!vht_op) 457 return false; 458 459 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 460 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 461 462 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 463 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 464 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 465 466 /* 467 * Many APs are incorrectly advertising an all-zero value here, 468 * which really means MCS 0-7 are required for 1-8 streams, but 469 * they don't really mean it that way. 470 * Some other APs are incorrectly advertising 3 spatial streams 471 * with MCS 0-7 are required, but don't really mean it that way 472 * and we'll connect only with HT, rather than even HE. 473 * As a result, unfortunately the VHT basic MCS/NSS set cannot 474 * be used at all, so check it only in strict mode. 475 */ 476 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 477 return true; 478 479 /* 480 * P802.11REVme/D7.0 - 6.5.4.2.4 481 * ... 482 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 483 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 484 * field in the VHT Operation parameter that contains any unsupported 485 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 486 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 487 * that is not set to the value SUCCESS. 488 * ... 489 */ 490 for (nss = 8; nss > 0; nss--) { 491 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 492 u8 sta_rx_val; 493 u8 sta_tx_val; 494 495 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 496 continue; 497 498 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 499 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 500 501 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 502 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 503 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 504 link_id_info(sdata, link_id, 505 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 506 nss, sta_rx_val, sta_tx_val, ap_op_val); 507 return false; 508 } 509 } 510 511 return true; 512 } 513 514 static bool 515 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 516 int link_id, 517 const struct ieee80211_he_cap_elem *he_cap, 518 const struct ieee80211_he_operation *he_op) 519 { 520 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 521 u16 mcs_80_map_tx, mcs_80_map_rx; 522 u16 ap_min_req_set; 523 int nss; 524 525 if (!he_cap) 526 return false; 527 528 /* mcs_nss is right after he_cap info */ 529 he_mcs_nss_supp = (void *)(he_cap + 1); 530 531 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 532 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 533 534 /* P802.11-REVme/D0.3 535 * 27.1.1 Introduction to the HE PHY 536 * ... 537 * An HE STA shall support the following features: 538 * ... 539 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 540 * supported channel widths for HE SU PPDUs 541 */ 542 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 543 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 544 link_id_info(sdata, link_id, 545 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 546 mcs_80_map_tx, mcs_80_map_rx); 547 return false; 548 } 549 550 if (!he_op) 551 return true; 552 553 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 554 555 /* 556 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 557 * zeroes, which is nonsense, and completely inconsistent with itself 558 * (it doesn't have 8 streams). Accept the settings in this case anyway. 559 */ 560 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 561 return true; 562 563 /* make sure the AP is consistent with itself 564 * 565 * P802.11-REVme/D0.3 566 * 26.17.1 Basic HE BSS operation 567 * 568 * A STA that is operating in an HE BSS shall be able to receive and 569 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 570 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 571 * MLME-START.request primitive and shall be able to receive at each of 572 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 573 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 574 * primitive 575 */ 576 for (nss = 8; nss > 0; nss--) { 577 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 578 u8 ap_rx_val; 579 u8 ap_tx_val; 580 581 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 582 continue; 583 584 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 585 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 586 587 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 588 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 589 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 590 link_id_info(sdata, link_id, 591 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 592 nss, ap_rx_val, ap_tx_val, ap_op_val); 593 return false; 594 } 595 } 596 597 return true; 598 } 599 600 static bool 601 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 602 struct ieee80211_supported_band *sband, 603 const struct ieee80211_he_operation *he_op) 604 { 605 const struct ieee80211_sta_he_cap *sta_he_cap = 606 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 607 u16 ap_min_req_set; 608 int i; 609 610 if (!sta_he_cap || !he_op) 611 return false; 612 613 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 614 615 /* 616 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 617 * zeroes, which is nonsense, and completely inconsistent with itself 618 * (it doesn't have 8 streams). Accept the settings in this case anyway. 619 */ 620 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 621 return true; 622 623 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 624 for (i = 0; i < 3; i++) { 625 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 626 &sta_he_cap->he_mcs_nss_supp; 627 u16 sta_mcs_map_rx = 628 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 629 u16 sta_mcs_map_tx = 630 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 631 u8 nss; 632 bool verified = true; 633 634 /* 635 * For each band there is a maximum of 8 spatial streams 636 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 637 * of 2 bits per NSS (1-8), with the values defined in enum 638 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 639 * capabilities aren't less than the AP's minimum requirements 640 * for this HE BSS per SS. 641 * It is enough to find one such band that meets the reqs. 642 */ 643 for (nss = 8; nss > 0; nss--) { 644 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 645 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 646 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 647 648 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 649 continue; 650 651 /* 652 * Make sure the HE AP doesn't require MCSs that aren't 653 * supported by the client as required by spec 654 * 655 * P802.11-REVme/D0.3 656 * 26.17.1 Basic HE BSS operation 657 * 658 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 659 * a BSS, unless it supports (i.e., is able to both transmit and 660 * receive using) all of the <HE-MCS, NSS> tuples in the basic 661 * HE-MCS and NSS set. 662 */ 663 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 664 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 665 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 666 verified = false; 667 break; 668 } 669 } 670 671 if (verified) 672 return true; 673 } 674 675 /* If here, STA doesn't meet AP's HE min requirements */ 676 return false; 677 } 678 679 static u8 680 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 681 const struct ieee80211_sta_eht_cap *sta_eht_cap, 682 unsigned int idx, int bw) 683 { 684 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 685 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 686 687 /* handle us being a 20 MHz-only EHT STA - with four values 688 * for MCS 0-7, 8-9, 10-11, 12-13. 689 */ 690 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 691 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 692 693 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 694 if (idx > 0) 695 idx--; 696 697 switch (bw) { 698 case 0: 699 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 700 case 1: 701 if (!(he_phy_cap0 & 702 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 703 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 704 return 0xff; /* pass check */ 705 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 706 case 2: 707 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 708 return 0xff; /* pass check */ 709 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 710 } 711 712 WARN_ON(1); 713 return 0; 714 } 715 716 static bool 717 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 718 struct ieee80211_supported_band *sband, 719 const struct ieee80211_eht_operation *eht_op) 720 { 721 const struct ieee80211_sta_he_cap *sta_he_cap = 722 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 723 const struct ieee80211_sta_eht_cap *sta_eht_cap = 724 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 725 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 726 unsigned int i; 727 728 if (!sta_he_cap || !sta_eht_cap || !eht_op) 729 return false; 730 731 req = &eht_op->basic_mcs_nss; 732 733 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 734 u8 req_rx_nss, req_tx_nss; 735 unsigned int bw; 736 737 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 738 IEEE80211_EHT_MCS_NSS_RX); 739 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 740 IEEE80211_EHT_MCS_NSS_TX); 741 742 for (bw = 0; bw < 3; bw++) { 743 u8 have, have_rx_nss, have_tx_nss; 744 745 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 746 sta_eht_cap, 747 i, bw); 748 have_rx_nss = u8_get_bits(have, 749 IEEE80211_EHT_MCS_NSS_RX); 750 have_tx_nss = u8_get_bits(have, 751 IEEE80211_EHT_MCS_NSS_TX); 752 753 if (req_rx_nss > have_rx_nss || 754 req_tx_nss > have_tx_nss) 755 return false; 756 } 757 } 758 759 return true; 760 } 761 762 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 763 const u8 *supp_rates, 764 unsigned int supp_rates_len, 765 const u8 *ext_supp_rates, 766 unsigned int ext_supp_rates_len, 767 u32 *rates, u32 *basic_rates, 768 unsigned long *unknown_rates_selectors, 769 bool *have_higher_than_11mbit, 770 int *min_rate, int *min_rate_index) 771 { 772 int i, j; 773 774 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 775 u8 supp_rate = i < supp_rates_len ? 776 supp_rates[i] : 777 ext_supp_rates[i - supp_rates_len]; 778 int rate = supp_rate & 0x7f; 779 bool is_basic = !!(supp_rate & 0x80); 780 781 if ((rate * 5) > 110 && have_higher_than_11mbit) 782 *have_higher_than_11mbit = true; 783 784 /* 785 * Skip membership selectors since they're not rates. 786 * 787 * Note: Even though the membership selector and the basic 788 * rate flag share the same bit, they are not exactly 789 * the same. 790 */ 791 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 792 if (unknown_rates_selectors) 793 set_bit(rate, unknown_rates_selectors); 794 continue; 795 } 796 797 for (j = 0; j < sband->n_bitrates; j++) { 798 struct ieee80211_rate *br; 799 int brate; 800 801 br = &sband->bitrates[j]; 802 803 brate = DIV_ROUND_UP(br->bitrate, 5); 804 if (brate == rate) { 805 if (rates) 806 *rates |= BIT(j); 807 if (is_basic && basic_rates) 808 *basic_rates |= BIT(j); 809 if (min_rate && (rate * 5) < *min_rate) { 810 *min_rate = rate * 5; 811 if (min_rate_index) 812 *min_rate_index = j; 813 } 814 break; 815 } 816 } 817 818 /* Handle an unknown entry as if it is an unknown selector */ 819 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 820 set_bit(rate, unknown_rates_selectors); 821 } 822 } 823 824 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 825 const struct cfg80211_chan_def *chandef, 826 u32 prohibited_flags) 827 { 828 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 829 chandef, prohibited_flags)) 830 return false; 831 832 if (chandef->punctured && 833 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 834 return false; 835 836 return true; 837 } 838 839 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 840 { 841 if (c->width == NL80211_CHAN_WIDTH_80P80) 842 return 4 + 4; 843 844 return cfg80211_chandef_get_width(c) / 20; 845 } 846 847 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 848 { 849 switch (c->width) { 850 case NL80211_CHAN_WIDTH_20: 851 case NL80211_CHAN_WIDTH_20_NOHT: 852 return 1; 853 case NL80211_CHAN_WIDTH_40: 854 return 2; 855 case NL80211_CHAN_WIDTH_80P80: 856 case NL80211_CHAN_WIDTH_80: 857 return 3; 858 case NL80211_CHAN_WIDTH_160: 859 return 4; 860 case NL80211_CHAN_WIDTH_320: 861 return 5; 862 default: 863 WARN_ON(1); 864 return 0; 865 } 866 } 867 868 VISIBLE_IF_MAC80211_KUNIT int 869 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 870 u8 n_partial_subchans) 871 { 872 int n = ieee80211_chandef_num_subchans(ap); 873 struct cfg80211_chan_def tmp = *ap; 874 int offset = 0; 875 876 /* 877 * Given a chandef (in this context, it's the AP's) and a number 878 * of subchannels that we want to look at ('n_partial_subchans'), 879 * calculate the offset in number of subchannels between the full 880 * and the subset with the desired width. 881 */ 882 883 /* same number of subchannels means no offset, obviously */ 884 if (n == n_partial_subchans) 885 return 0; 886 887 /* don't WARN - misconfigured APs could cause this if their N > width */ 888 if (n < n_partial_subchans) 889 return 0; 890 891 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 892 u32 prev = tmp.center_freq1; 893 894 ieee80211_chandef_downgrade(&tmp, NULL); 895 896 /* 897 * if center_freq moved up, half the original channels 898 * are gone now but were below, so increase offset 899 */ 900 if (prev < tmp.center_freq1) 901 offset += ieee80211_chandef_num_subchans(&tmp); 902 } 903 904 /* 905 * 80+80 with secondary 80 below primary - four subchannels for it 906 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 907 */ 908 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 909 ap->center_freq2 < ap->center_freq1) 910 offset += 4; 911 912 return offset; 913 } 914 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 915 916 VISIBLE_IF_MAC80211_KUNIT void 917 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 918 const struct cfg80211_chan_def *ap, 919 const struct cfg80211_chan_def *used) 920 { 921 u8 needed = ieee80211_chandef_num_subchans(used); 922 u8 have = ieee80211_chandef_num_subchans(ap); 923 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 924 u8 offset; 925 926 if (!psd->valid) 927 return; 928 929 /* if N is zero, all defaults were used, no point in rearranging */ 930 if (!psd->n) 931 goto out; 932 933 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 934 935 /* 936 * This assumes that 'N' is consistent with the HE channel, as 937 * it should be (otherwise the AP is broken). 938 * 939 * In psd->power we have values in the order 0..N, 0..K, where 940 * N+K should cover the entire channel per 'ap', but even if it 941 * doesn't then we've pre-filled 'unlimited' as defaults. 942 * 943 * But this is all the wrong order, we want to have them in the 944 * order of the 'used' channel. 945 * 946 * So for example, we could have a 320 MHz EHT AP, which has the 947 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 948 * seem to be considered for the TPE), as follows: 949 * 950 * EHT 320: | | | | | | | | | | | | | | | | | 951 * HE 80: | | | | | 952 * used 160: | | | | | | | | | 953 * 954 * N entries: |--|--|--|--| 955 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 956 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 957 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 958 * used chan: 0 1 2 3 4 5 6 7 959 * 960 * The idx in the power array ('power idx') is like this since it 961 * comes directly from the element's N and K entries in their 962 * element order, and those are this way for HE compatibility. 963 * 964 * Rearrange them as desired here, first by putting them into the 965 * 'full chan' order, and then selecting the necessary subset for 966 * the 'used chan'. 967 */ 968 969 /* first reorder according to AP channel */ 970 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 971 for (int i = 0; i < have; i++) { 972 if (i < offset) 973 tmp[i] = psd->power[i + psd->n]; 974 else if (i < offset + psd->n) 975 tmp[i] = psd->power[i - offset]; 976 else 977 tmp[i] = psd->power[i]; 978 } 979 980 /* 981 * and then select the subset for the used channel 982 * (set everything to defaults first in case a driver is confused) 983 */ 984 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 985 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 986 for (int i = 0; i < needed; i++) 987 psd->power[i] = tmp[offset + i]; 988 989 out: 990 /* limit, but don't lie if there are defaults in the data */ 991 if (needed < psd->count) 992 psd->count = needed; 993 } 994 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 995 996 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 997 const struct cfg80211_chan_def *ap, 998 const struct cfg80211_chan_def *used) 999 { 1000 /* ignore this completely for narrow/invalid channels */ 1001 if (!ieee80211_chandef_num_subchans(ap) || 1002 !ieee80211_chandef_num_subchans(used)) { 1003 ieee80211_clear_tpe(tpe); 1004 return; 1005 } 1006 1007 for (int i = 0; i < 2; i++) { 1008 int needed_pwr_count; 1009 1010 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 1011 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 1012 1013 /* limit this to the widths we actually need */ 1014 needed_pwr_count = ieee80211_chandef_num_widths(used); 1015 if (needed_pwr_count < tpe->max_local[i].count) 1016 tpe->max_local[i].count = needed_pwr_count; 1017 if (needed_pwr_count < tpe->max_reg_client[i].count) 1018 tpe->max_reg_client[i].count = needed_pwr_count; 1019 } 1020 } 1021 1022 /* 1023 * The AP part of the channel request is used to distinguish settings 1024 * to the device used for wider bandwidth OFDMA. This is used in the 1025 * channel context code to assign two channel contexts even if they're 1026 * both for the same channel, if the AP bandwidths are incompatible. 1027 * If not EHT (or driver override) then ap.chan == NULL indicates that 1028 * there's no wider BW OFDMA used. 1029 */ 1030 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 1031 struct ieee80211_chan_req *chanreq, 1032 struct ieee80211_conn_settings *conn, 1033 struct cfg80211_chan_def *ap_chandef) 1034 { 1035 chanreq->ap.chan = NULL; 1036 1037 if (conn->mode < IEEE80211_CONN_MODE_EHT) 1038 return; 1039 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 1040 return; 1041 1042 chanreq->ap = *ap_chandef; 1043 } 1044 1045 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 1046 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 1047 struct ieee80211_conn_settings *conn, 1048 struct cfg80211_bss *cbss, int link_id, 1049 struct ieee80211_chan_req *chanreq, 1050 struct cfg80211_chan_def *ap_chandef, 1051 unsigned long *userspace_selectors) 1052 { 1053 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1054 struct ieee80211_bss *bss = (void *)cbss->priv; 1055 struct ieee80211_channel *channel = cbss->channel; 1056 struct ieee80211_elems_parse_params parse_params = { 1057 .link_id = -1, 1058 .from_ap = true, 1059 .start = ies->data, 1060 .len = ies->len, 1061 .type = ies->from_beacon ? 1062 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1063 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1064 }; 1065 struct ieee802_11_elems *elems; 1066 struct ieee80211_supported_band *sband; 1067 enum ieee80211_conn_mode ap_mode; 1068 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1069 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1070 int ret; 1071 1072 again: 1073 parse_params.mode = conn->mode; 1074 elems = ieee802_11_parse_elems_full(&parse_params); 1075 if (!elems) 1076 return ERR_PTR(-ENOMEM); 1077 1078 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1079 elems, false, conn, ap_chandef); 1080 1081 /* this should be impossible since parsing depends on our mode */ 1082 if (WARN_ON(ap_mode > conn->mode)) { 1083 ret = -EINVAL; 1084 goto free; 1085 } 1086 1087 if (conn->mode != ap_mode) { 1088 conn->mode = ap_mode; 1089 kfree(elems); 1090 goto again; 1091 } 1092 1093 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1094 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1095 1096 sband = sdata->local->hw.wiphy->bands[channel->band]; 1097 1098 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1099 elems->ext_supp_rates, elems->ext_supp_rates_len, 1100 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1101 NULL); 1102 1103 switch (channel->band) { 1104 case NL80211_BAND_S1GHZ: 1105 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1106 ret = -EINVAL; 1107 goto free; 1108 } 1109 1110 chanreq->oper = *ap_chandef; 1111 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1112 IEEE80211_CHAN_DISABLED)) { 1113 ret = -EINVAL; 1114 goto free; 1115 } 1116 1117 return elems; 1118 case NL80211_BAND_6GHZ: 1119 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1120 link_id_info(sdata, link_id, 1121 "Rejecting non-HE 6/7 GHz connection"); 1122 ret = -EINVAL; 1123 goto free; 1124 } 1125 break; 1126 default: 1127 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1128 ret = -EINVAL; 1129 goto free; 1130 } 1131 } 1132 1133 switch (ap_mode) { 1134 case IEEE80211_CONN_MODE_S1G: 1135 WARN_ON(1); 1136 ret = -EINVAL; 1137 goto free; 1138 case IEEE80211_CONN_MODE_LEGACY: 1139 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1140 break; 1141 case IEEE80211_CONN_MODE_HT: 1142 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1143 conn->bw_limit, 1144 IEEE80211_CONN_BW_LIMIT_40); 1145 break; 1146 case IEEE80211_CONN_MODE_VHT: 1147 case IEEE80211_CONN_MODE_HE: 1148 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1149 conn->bw_limit, 1150 IEEE80211_CONN_BW_LIMIT_160); 1151 break; 1152 case IEEE80211_CONN_MODE_EHT: 1153 case IEEE80211_CONN_MODE_UHR: 1154 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1155 conn->bw_limit, 1156 IEEE80211_CONN_BW_LIMIT_320); 1157 break; 1158 } 1159 1160 chanreq->oper = *ap_chandef; 1161 1162 bitmap_copy(sta_selectors, userspace_selectors, 128); 1163 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1164 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1165 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1166 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1167 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1168 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1169 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1170 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1171 if (conn->mode >= IEEE80211_CONN_MODE_UHR) 1172 set_bit(BSS_MEMBERSHIP_SELECTOR_UHR_PHY, sta_selectors); 1173 1174 /* 1175 * We do not support EPD or GLK so never add them. 1176 * SAE_H2E is handled through userspace_selectors. 1177 */ 1178 1179 /* Check if we support all required features */ 1180 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1181 link_id_info(sdata, link_id, 1182 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1183 ret = -EINVAL; 1184 goto free; 1185 } 1186 1187 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1188 1189 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1190 IEEE80211_CHAN_DISABLED)) { 1191 if (chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT) { 1192 link_id_info(sdata, link_id, 1193 "unusable channel (%d MHz) for connection\n", 1194 chanreq->oper.chan->center_freq); 1195 ret = -EINVAL; 1196 goto free; 1197 } 1198 1199 ieee80211_chanreq_downgrade(chanreq, conn); 1200 } 1201 1202 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1203 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1204 IEEE80211_CHAN_NO_HE)) { 1205 conn->mode = IEEE80211_CONN_MODE_VHT; 1206 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1207 conn->bw_limit, 1208 IEEE80211_CONN_BW_LIMIT_160); 1209 } 1210 1211 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1212 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1213 IEEE80211_CHAN_NO_EHT)) { 1214 conn->mode = IEEE80211_CONN_MODE_HE; 1215 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1216 conn->bw_limit, 1217 IEEE80211_CONN_BW_LIMIT_160); 1218 } 1219 1220 if (conn->mode >= IEEE80211_CONN_MODE_UHR && 1221 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1222 IEEE80211_CHAN_NO_UHR)) 1223 conn->mode = IEEE80211_CONN_MODE_EHT; 1224 1225 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1226 link_id_info(sdata, link_id, 1227 "regulatory prevented using AP config, downgraded\n"); 1228 1229 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1230 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1231 elems->ht_operation)) { 1232 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1233 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1234 link_id_info(sdata, link_id, 1235 "required MCSes not supported, disabling HT\n"); 1236 } 1237 1238 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1239 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1240 elems->vht_operation)) { 1241 conn->mode = IEEE80211_CONN_MODE_HT; 1242 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1243 conn->bw_limit, 1244 IEEE80211_CONN_BW_LIMIT_40); 1245 link_id_info(sdata, link_id, 1246 "required MCSes not supported, disabling VHT\n"); 1247 } 1248 1249 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1250 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1251 (void *)elems->he_cap, 1252 elems->he_operation) || 1253 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1254 elems->he_operation))) { 1255 conn->mode = IEEE80211_CONN_MODE_VHT; 1256 link_id_info(sdata, link_id, 1257 "required MCSes not supported, disabling HE\n"); 1258 } 1259 1260 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1261 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1262 elems->eht_operation)) { 1263 conn->mode = IEEE80211_CONN_MODE_HE; 1264 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1265 conn->bw_limit, 1266 IEEE80211_CONN_BW_LIMIT_160); 1267 link_id_info(sdata, link_id, 1268 "required MCSes not supported, disabling EHT\n"); 1269 } 1270 1271 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1272 channel->band != NL80211_BAND_2GHZ && 1273 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1274 conn->mode = IEEE80211_CONN_MODE_HE; 1275 link_id_info(sdata, link_id, 1276 "required bandwidth not supported, disabling EHT\n"); 1277 } 1278 1279 /* the mode can only decrease, so this must terminate */ 1280 if (ap_mode != conn->mode) { 1281 kfree(elems); 1282 goto again; 1283 } 1284 1285 mlme_link_id_dbg(sdata, link_id, 1286 "connecting with %s mode, max bandwidth %d MHz\n", 1287 ieee80211_conn_mode_str(conn->mode), 1288 20 * (1 << conn->bw_limit)); 1289 1290 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1291 ret = -EINVAL; 1292 goto free; 1293 } 1294 1295 return elems; 1296 free: 1297 kfree(elems); 1298 return ERR_PTR(ret); 1299 } 1300 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1301 1302 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1303 struct ieee802_11_elems *elems, 1304 bool update, u64 *changed, u16 stype) 1305 { 1306 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1307 struct ieee80211_sub_if_data *sdata = link->sdata; 1308 struct ieee80211_chan_req chanreq = {}; 1309 struct cfg80211_chan_def ap_chandef; 1310 enum ieee80211_conn_mode ap_mode; 1311 const char *frame; 1312 u32 vht_cap_info = 0; 1313 u16 ht_opmode; 1314 int ret; 1315 1316 switch (stype) { 1317 case IEEE80211_STYPE_BEACON: 1318 frame = "beacon"; 1319 break; 1320 case IEEE80211_STYPE_ASSOC_RESP: 1321 frame = "assoc response"; 1322 break; 1323 case IEEE80211_STYPE_REASSOC_RESP: 1324 frame = "reassoc response"; 1325 break; 1326 case IEEE80211_STYPE_ACTION: 1327 /* the only action frame that gets here */ 1328 frame = "ML reconf response"; 1329 break; 1330 default: 1331 return -EINVAL; 1332 } 1333 1334 /* don't track any bandwidth changes in legacy/S1G modes */ 1335 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1336 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1337 return 0; 1338 1339 if (elems->vht_cap_elem) 1340 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1341 1342 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1343 elems, true, &link->u.mgd.conn, 1344 &ap_chandef); 1345 1346 if (ap_mode != link->u.mgd.conn.mode) { 1347 link_info(link, 1348 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1349 link->u.mgd.bssid, 1350 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1351 ieee80211_conn_mode_str(ap_mode), frame); 1352 return -EINVAL; 1353 } 1354 1355 chanreq.oper = ap_chandef; 1356 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1357 &ap_chandef); 1358 1359 /* 1360 * if HT operation mode changed store the new one - 1361 * this may be applicable even if channel is identical 1362 */ 1363 if (elems->ht_operation) { 1364 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1365 if (link->conf->ht_operation_mode != ht_opmode) { 1366 *changed |= BSS_CHANGED_HT; 1367 link->conf->ht_operation_mode = ht_opmode; 1368 } 1369 } 1370 1371 /* 1372 * Downgrade the new channel if we associated with restricted 1373 * bandwidth capabilities. For example, if we associated as a 1374 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1375 * or config reasons) then switching to a 40 MHz channel now 1376 * won't do us any good -- we couldn't use it with the AP. 1377 */ 1378 while (link->u.mgd.conn.bw_limit < 1379 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1380 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1381 1382 /* TPE element is not present in (re)assoc/ML reconfig response */ 1383 if (stype == IEEE80211_STYPE_BEACON && 1384 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1385 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1386 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1387 &chanreq.oper); 1388 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1389 link->conf->tpe = elems->tpe; 1390 *changed |= BSS_CHANGED_TPE; 1391 } 1392 } 1393 1394 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1395 return 0; 1396 1397 link_info(link, 1398 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1399 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1400 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1401 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1402 chanreq.oper.center_freq2); 1403 1404 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1405 sdata_info(sdata, 1406 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1407 link->u.mgd.bssid, frame); 1408 return -EINVAL; 1409 } 1410 1411 if (!update) { 1412 link->conf->chanreq = chanreq; 1413 return 0; 1414 } 1415 1416 /* 1417 * We're tracking the current AP here, so don't do any further checks 1418 * here. This keeps us from playing ping-pong with regulatory, without 1419 * it the following can happen (for example): 1420 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1421 * - AP advertises regdom US 1422 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1423 * - we detect an unsupported channel and disconnect 1424 * - disconnect causes CRDA to reload world regdomain and the game 1425 * starts anew. 1426 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1427 * 1428 * It seems possible that there are still scenarios with CSA or real 1429 * bandwidth changes where a this could happen, but those cases are 1430 * less common and wouldn't completely prevent using the AP. 1431 */ 1432 1433 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1434 if (ret) { 1435 sdata_info(sdata, 1436 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1437 link->u.mgd.bssid, frame); 1438 return ret; 1439 } 1440 1441 cfg80211_schedule_channels_check(&sdata->wdev); 1442 return 0; 1443 } 1444 1445 /* frame sending functions */ 1446 1447 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1448 struct sk_buff *skb, u8 ap_ht_param, 1449 struct ieee80211_supported_band *sband, 1450 struct ieee80211_channel *channel, 1451 enum ieee80211_smps_mode smps, 1452 const struct ieee80211_conn_settings *conn) 1453 { 1454 u8 *pos; 1455 u32 flags = channel->flags; 1456 u16 cap; 1457 struct ieee80211_sta_ht_cap ht_cap; 1458 1459 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1460 1461 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1462 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1463 1464 /* determine capability flags */ 1465 cap = ht_cap.cap; 1466 1467 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1468 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1469 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1470 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1471 cap &= ~IEEE80211_HT_CAP_SGI_40; 1472 } 1473 break; 1474 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1475 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1476 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1477 cap &= ~IEEE80211_HT_CAP_SGI_40; 1478 } 1479 break; 1480 } 1481 1482 /* 1483 * If 40 MHz was disabled associate as though we weren't 1484 * capable of 40 MHz -- some broken APs will never fall 1485 * back to trying to transmit in 20 MHz. 1486 */ 1487 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1488 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1489 cap &= ~IEEE80211_HT_CAP_SGI_40; 1490 } 1491 1492 /* set SM PS mode properly */ 1493 cap &= ~IEEE80211_HT_CAP_SM_PS; 1494 switch (smps) { 1495 case IEEE80211_SMPS_AUTOMATIC: 1496 case IEEE80211_SMPS_NUM_MODES: 1497 WARN_ON(1); 1498 fallthrough; 1499 case IEEE80211_SMPS_OFF: 1500 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1501 IEEE80211_HT_CAP_SM_PS_SHIFT; 1502 break; 1503 case IEEE80211_SMPS_STATIC: 1504 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1505 IEEE80211_HT_CAP_SM_PS_SHIFT; 1506 break; 1507 case IEEE80211_SMPS_DYNAMIC: 1508 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1509 IEEE80211_HT_CAP_SM_PS_SHIFT; 1510 break; 1511 } 1512 1513 /* reserve and fill IE */ 1514 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1515 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1516 } 1517 1518 /* This function determines vht capability flags for the association 1519 * and builds the IE. 1520 * Note - the function returns true to own the MU-MIMO capability 1521 */ 1522 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1523 struct sk_buff *skb, 1524 struct ieee80211_supported_band *sband, 1525 struct ieee80211_vht_cap *ap_vht_cap, 1526 const struct ieee80211_conn_settings *conn) 1527 { 1528 struct ieee80211_local *local = sdata->local; 1529 u8 *pos; 1530 u32 cap; 1531 struct ieee80211_sta_vht_cap vht_cap; 1532 u32 mask, ap_bf_sts, our_bf_sts; 1533 bool mu_mimo_owner = false; 1534 1535 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1536 1537 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1538 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1539 1540 /* determine capability flags */ 1541 cap = vht_cap.cap; 1542 1543 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1544 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1545 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1546 } 1547 1548 /* 1549 * Some APs apparently get confused if our capabilities are better 1550 * than theirs, so restrict what we advertise in the assoc request. 1551 */ 1552 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1553 if (!(ap_vht_cap->vht_cap_info & 1554 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1555 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1556 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1557 else if (!(ap_vht_cap->vht_cap_info & 1558 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1559 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1560 } 1561 1562 /* 1563 * If some other vif is using the MU-MIMO capability we cannot associate 1564 * using MU-MIMO - this will lead to contradictions in the group-id 1565 * mechanism. 1566 * Ownership is defined since association request, in order to avoid 1567 * simultaneous associations with MU-MIMO. 1568 */ 1569 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1570 bool disable_mu_mimo = false; 1571 struct ieee80211_sub_if_data *other; 1572 1573 list_for_each_entry(other, &local->interfaces, list) { 1574 if (other->vif.bss_conf.mu_mimo_owner) { 1575 disable_mu_mimo = true; 1576 break; 1577 } 1578 } 1579 if (disable_mu_mimo) 1580 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1581 else 1582 mu_mimo_owner = true; 1583 } 1584 1585 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1586 1587 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1588 our_bf_sts = cap & mask; 1589 1590 if (ap_bf_sts < our_bf_sts) { 1591 cap &= ~mask; 1592 cap |= ap_bf_sts; 1593 } 1594 1595 /* reserve and fill IE */ 1596 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1597 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1598 1599 return mu_mimo_owner; 1600 } 1601 1602 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1603 struct sk_buff *skb, 1604 enum nl80211_chan_width width, 1605 struct ieee80211_supported_band *sband, 1606 struct ieee80211_mgd_assoc_data *assoc_data) 1607 { 1608 u32 rates; 1609 1610 if (assoc_data->supp_rates_len && 1611 !ieee80211_hw_check(&local->hw, STRICT)) { 1612 /* 1613 * Get all rates supported by the device and the AP as 1614 * some APs don't like getting a superset of their rates 1615 * in the association request (e.g. D-Link DAP 1353 in 1616 * b-only mode)... 1617 */ 1618 ieee80211_parse_bitrates(sband, 1619 assoc_data->supp_rates, 1620 assoc_data->supp_rates_len, 1621 &rates); 1622 } else { 1623 /* 1624 * In case AP not provide any supported rates information 1625 * before association, we send information element(s) with 1626 * all rates that we support. 1627 */ 1628 rates = ~0; 1629 } 1630 1631 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1632 WLAN_EID_SUPP_RATES); 1633 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1634 WLAN_EID_EXT_SUPP_RATES); 1635 } 1636 1637 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1638 const u8 *elems, 1639 size_t elems_len, 1640 size_t offset) 1641 { 1642 size_t noffset; 1643 1644 static const u8 before_ht[] = { 1645 WLAN_EID_SSID, 1646 WLAN_EID_SUPP_RATES, 1647 WLAN_EID_EXT_SUPP_RATES, 1648 WLAN_EID_PWR_CAPABILITY, 1649 WLAN_EID_SUPPORTED_CHANNELS, 1650 WLAN_EID_RSN, 1651 WLAN_EID_QOS_CAPA, 1652 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1653 WLAN_EID_MOBILITY_DOMAIN, 1654 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1655 WLAN_EID_RIC_DATA, /* reassoc only */ 1656 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1657 }; 1658 static const u8 after_ric[] = { 1659 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1660 WLAN_EID_HT_CAPABILITY, 1661 WLAN_EID_BSS_COEX_2040, 1662 /* luckily this is almost always there */ 1663 WLAN_EID_EXT_CAPABILITY, 1664 WLAN_EID_QOS_TRAFFIC_CAPA, 1665 WLAN_EID_TIM_BCAST_REQ, 1666 WLAN_EID_INTERWORKING, 1667 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1668 WLAN_EID_VHT_CAPABILITY, 1669 WLAN_EID_OPMODE_NOTIF, 1670 }; 1671 1672 if (!elems_len) 1673 return offset; 1674 1675 noffset = ieee80211_ie_split_ric(elems, elems_len, 1676 before_ht, 1677 ARRAY_SIZE(before_ht), 1678 after_ric, 1679 ARRAY_SIZE(after_ric), 1680 offset); 1681 skb_put_data(skb, elems + offset, noffset - offset); 1682 1683 return noffset; 1684 } 1685 1686 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1687 const u8 *elems, 1688 size_t elems_len, 1689 size_t offset) 1690 { 1691 static const u8 before_vht[] = { 1692 /* 1693 * no need to list the ones split off before HT 1694 * or generated here 1695 */ 1696 WLAN_EID_BSS_COEX_2040, 1697 WLAN_EID_EXT_CAPABILITY, 1698 WLAN_EID_QOS_TRAFFIC_CAPA, 1699 WLAN_EID_TIM_BCAST_REQ, 1700 WLAN_EID_INTERWORKING, 1701 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1702 }; 1703 size_t noffset; 1704 1705 if (!elems_len) 1706 return offset; 1707 1708 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1709 noffset = ieee80211_ie_split(elems, elems_len, 1710 before_vht, ARRAY_SIZE(before_vht), 1711 offset); 1712 skb_put_data(skb, elems + offset, noffset - offset); 1713 1714 return noffset; 1715 } 1716 1717 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1718 const u8 *elems, 1719 size_t elems_len, 1720 size_t offset) 1721 { 1722 static const u8 before_he[] = { 1723 /* 1724 * no need to list the ones split off before VHT 1725 * or generated here 1726 */ 1727 WLAN_EID_OPMODE_NOTIF, 1728 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1729 /* 11ai elements */ 1730 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1731 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1732 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1733 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1734 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1735 /* TODO: add 11ah/11aj/11ak elements */ 1736 }; 1737 size_t noffset; 1738 1739 if (!elems_len) 1740 return offset; 1741 1742 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1743 noffset = ieee80211_ie_split(elems, elems_len, 1744 before_he, ARRAY_SIZE(before_he), 1745 offset); 1746 skb_put_data(skb, elems + offset, noffset - offset); 1747 1748 return noffset; 1749 } 1750 1751 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1752 const u8 *elems, size_t elems_len, 1753 size_t offset) 1754 { 1755 static const u8 before_reg_conn[] = { 1756 /* 1757 * no need to list the ones split off before HE 1758 * or generated here 1759 */ 1760 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1761 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1762 }; 1763 size_t noffset; 1764 1765 if (!elems_len) 1766 return offset; 1767 1768 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1769 ARRAY_SIZE(before_reg_conn), offset); 1770 skb_put_data(skb, elems + offset, noffset - offset); 1771 1772 return noffset; 1773 } 1774 1775 #define PRESENT_ELEMS_MAX 8 1776 #define PRESENT_ELEM_EXT_OFFS 0x100 1777 1778 static void 1779 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1780 struct sk_buff *skb, u16 capab, 1781 const struct element *ext_capa, 1782 const u16 *present_elems, 1783 struct ieee80211_mgd_assoc_data *assoc_data); 1784 1785 static size_t 1786 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1787 struct sk_buff *skb, u16 *capab, 1788 const struct element *ext_capa, 1789 const u8 *extra_elems, 1790 size_t extra_elems_len, 1791 unsigned int link_id, 1792 struct ieee80211_link_data *link, 1793 u16 *present_elems, 1794 struct ieee80211_mgd_assoc_data *assoc_data) 1795 { 1796 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1797 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1798 struct ieee80211_channel *chan = cbss->channel; 1799 const struct ieee80211_sband_iftype_data *iftd; 1800 struct ieee80211_local *local = sdata->local; 1801 struct ieee80211_supported_band *sband; 1802 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1803 struct ieee80211_chanctx_conf *chanctx_conf; 1804 enum ieee80211_smps_mode smps_mode; 1805 u16 orig_capab = *capab; 1806 size_t offset = 0; 1807 int present_elems_len = 0; 1808 u8 *pos; 1809 int i; 1810 1811 #define ADD_PRESENT_ELEM(id) do { \ 1812 /* need a last for termination - we use 0 == SSID */ \ 1813 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1814 present_elems[present_elems_len++] = (id); \ 1815 } while (0) 1816 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1817 1818 if (link) 1819 smps_mode = link->smps_mode; 1820 else if (sdata->u.mgd.powersave) 1821 smps_mode = IEEE80211_SMPS_DYNAMIC; 1822 else 1823 smps_mode = IEEE80211_SMPS_OFF; 1824 1825 if (link) { 1826 /* 1827 * 5/10 MHz scenarios are only viable without MLO, in which 1828 * case this pointer should be used ... All of this is a bit 1829 * unclear though, not sure this even works at all. 1830 */ 1831 rcu_read_lock(); 1832 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1833 if (chanctx_conf) 1834 width = chanctx_conf->def.width; 1835 rcu_read_unlock(); 1836 } 1837 1838 sband = local->hw.wiphy->bands[chan->band]; 1839 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1840 1841 if (sband->band == NL80211_BAND_2GHZ) { 1842 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1843 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1844 } 1845 1846 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1847 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1848 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1849 1850 if (sband->band != NL80211_BAND_S1GHZ) 1851 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1852 1853 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1854 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1855 struct cfg80211_chan_def chandef = { 1856 .width = width, 1857 .chan = chan, 1858 }; 1859 1860 pos = skb_put(skb, 4); 1861 *pos++ = WLAN_EID_PWR_CAPABILITY; 1862 *pos++ = 2; 1863 *pos++ = 0; /* min tx power */ 1864 /* max tx power */ 1865 *pos++ = ieee80211_chandef_max_power(&chandef); 1866 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1867 } 1868 1869 /* 1870 * Per spec, we shouldn't include the list of channels if we advertise 1871 * support for extended channel switching, but we've always done that; 1872 * (for now?) apply this restriction only on the (new) 6 GHz band. 1873 */ 1874 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1875 (sband->band != NL80211_BAND_6GHZ || 1876 !ext_capa || ext_capa->datalen < 1 || 1877 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1878 /* TODO: get this in reg domain format */ 1879 pos = skb_put(skb, 2 * sband->n_channels + 2); 1880 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1881 *pos++ = 2 * sband->n_channels; 1882 for (i = 0; i < sband->n_channels; i++) { 1883 int cf = sband->channels[i].center_freq; 1884 1885 *pos++ = ieee80211_frequency_to_channel(cf); 1886 *pos++ = 1; /* one channel in the subband*/ 1887 } 1888 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1889 } 1890 1891 /* if present, add any custom IEs that go before HT */ 1892 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1893 extra_elems_len, 1894 offset); 1895 1896 if (sband->band != NL80211_BAND_6GHZ && 1897 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1898 ieee80211_add_ht_ie(sdata, skb, 1899 assoc_data->link[link_id].ap_ht_param, 1900 sband, chan, smps_mode, 1901 &assoc_data->link[link_id].conn); 1902 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1903 } 1904 1905 /* if present, add any custom IEs that go before VHT */ 1906 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1907 extra_elems_len, 1908 offset); 1909 1910 if (sband->band != NL80211_BAND_6GHZ && 1911 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1912 sband->vht_cap.vht_supported) { 1913 bool mu_mimo_owner = 1914 ieee80211_add_vht_ie(sdata, skb, sband, 1915 &assoc_data->link[link_id].ap_vht_cap, 1916 &assoc_data->link[link_id].conn); 1917 1918 if (link) 1919 link->conf->mu_mimo_owner = mu_mimo_owner; 1920 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1921 } 1922 1923 /* if present, add any custom IEs that go before HE */ 1924 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1925 extra_elems_len, 1926 offset); 1927 1928 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1929 ieee80211_put_he_cap(skb, sdata, sband, 1930 &assoc_data->link[link_id].conn); 1931 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1932 if (sband->band == NL80211_BAND_6GHZ) 1933 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1934 } 1935 1936 /* 1937 * if present, add any custom IEs that go before regulatory 1938 * connectivity element 1939 */ 1940 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1941 extra_elems_len, offset); 1942 1943 if (sband->band == NL80211_BAND_6GHZ) { 1944 /* 1945 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1946 * capable of operating on the 6 GHz band shall transmit 1947 * regulatory connectivity element. 1948 */ 1949 ieee80211_put_reg_conn(skb, chan->flags); 1950 } 1951 1952 /* 1953 * careful - need to know about all the present elems before 1954 * calling ieee80211_assoc_add_ml_elem(), so add these if 1955 * we're going to put them after the ML element 1956 */ 1957 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1958 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1959 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 1960 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_UHR_CAPA); 1961 1962 if (link_id == assoc_data->assoc_link_id) 1963 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1964 present_elems, assoc_data); 1965 1966 /* crash if somebody gets it wrong */ 1967 present_elems = NULL; 1968 1969 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1970 ieee80211_put_eht_cap(skb, sdata, sband, 1971 &assoc_data->link[link_id].conn); 1972 1973 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_UHR) 1974 ieee80211_put_uhr_cap(skb, sdata, sband); 1975 1976 if (sband->band == NL80211_BAND_S1GHZ) { 1977 ieee80211_add_aid_request_ie(sdata, skb); 1978 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1979 } 1980 1981 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1982 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1983 1984 return offset; 1985 } 1986 1987 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1988 const u16 *outer, 1989 const u16 *inner) 1990 { 1991 unsigned int skb_len = skb->len; 1992 bool at_extension = false; 1993 bool added = false; 1994 int i, j; 1995 u8 *len, *list_len = NULL; 1996 1997 skb_put_u8(skb, WLAN_EID_EXTENSION); 1998 len = skb_put(skb, 1); 1999 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 2000 2001 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 2002 u16 elem = outer[i]; 2003 bool have_inner = false; 2004 2005 /* should at least be sorted in the sense of normal -> ext */ 2006 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 2007 2008 /* switch to extension list */ 2009 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 2010 at_extension = true; 2011 if (!list_len) 2012 skb_put_u8(skb, 0); 2013 list_len = NULL; 2014 } 2015 2016 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 2017 if (elem == inner[j]) { 2018 have_inner = true; 2019 break; 2020 } 2021 } 2022 2023 if (have_inner) 2024 continue; 2025 2026 if (!list_len) { 2027 list_len = skb_put(skb, 1); 2028 *list_len = 0; 2029 } 2030 *list_len += 1; 2031 skb_put_u8(skb, (u8)elem); 2032 added = true; 2033 } 2034 2035 /* if we added a list but no extension list, make a zero-len one */ 2036 if (added && (!at_extension || !list_len)) 2037 skb_put_u8(skb, 0); 2038 2039 /* if nothing added remove extension element completely */ 2040 if (!added) 2041 skb_trim(skb, skb_len); 2042 else 2043 *len = skb->len - skb_len - 2; 2044 } 2045 2046 static void 2047 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 2048 struct sk_buff *skb, u16 capab, 2049 const struct element *ext_capa, 2050 const u16 *outer_present_elems, 2051 struct ieee80211_mgd_assoc_data *assoc_data) 2052 { 2053 struct ieee80211_local *local = sdata->local; 2054 struct ieee80211_multi_link_elem *ml_elem; 2055 struct ieee80211_mle_basic_common_info *common; 2056 const struct wiphy_iftype_ext_capab *ift_ext_capa; 2057 __le16 eml_capa = 0, mld_capa_ops = 0; 2058 unsigned int link_id; 2059 u8 *ml_elem_len; 2060 void *capab_pos; 2061 2062 if (!ieee80211_vif_is_mld(&sdata->vif)) 2063 return; 2064 2065 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 2066 ieee80211_vif_type_p2p(&sdata->vif)); 2067 if (ift_ext_capa) { 2068 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 2069 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 2070 } 2071 2072 skb_put_u8(skb, WLAN_EID_EXTENSION); 2073 ml_elem_len = skb_put(skb, 1); 2074 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2075 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2076 ml_elem->control = 2077 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2078 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2079 common = skb_put(skb, sizeof(*common)); 2080 common->len = sizeof(*common) + 2081 2; /* MLD capa/ops */ 2082 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2083 2084 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2085 if (eml_capa & 2086 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2087 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2088 common->len += 2; /* EML capabilities */ 2089 ml_elem->control |= 2090 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2091 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2092 } 2093 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2094 2095 if (assoc_data->ext_mld_capa_ops) { 2096 ml_elem->control |= 2097 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2098 common->len += 2; 2099 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2100 sizeof(assoc_data->ext_mld_capa_ops)); 2101 } 2102 2103 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2104 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2105 const u8 *extra_elems; 2106 size_t extra_elems_len; 2107 size_t extra_used; 2108 u8 *subelem_len = NULL; 2109 __le16 ctrl; 2110 2111 if (!assoc_data->link[link_id].bss || 2112 link_id == assoc_data->assoc_link_id) 2113 continue; 2114 2115 extra_elems = assoc_data->link[link_id].elems; 2116 extra_elems_len = assoc_data->link[link_id].elems_len; 2117 2118 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2119 subelem_len = skb_put(skb, 1); 2120 2121 ctrl = cpu_to_le16(link_id | 2122 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2123 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2124 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2125 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2126 skb_put_data(skb, assoc_data->link[link_id].addr, 2127 ETH_ALEN); 2128 /* 2129 * Now add the contents of the (re)association request, 2130 * but the "listen interval" and "current AP address" 2131 * (if applicable) are skipped. So we only have 2132 * the capability field (remember the position and fill 2133 * later), followed by the elements added below by 2134 * calling ieee80211_add_link_elems(). 2135 */ 2136 capab_pos = skb_put(skb, 2); 2137 2138 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2139 ext_capa, 2140 extra_elems, 2141 extra_elems_len, 2142 link_id, NULL, 2143 link_present_elems, 2144 assoc_data); 2145 if (extra_elems) 2146 skb_put_data(skb, extra_elems + extra_used, 2147 extra_elems_len - extra_used); 2148 2149 put_unaligned_le16(capab, capab_pos); 2150 2151 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2152 link_present_elems); 2153 2154 ieee80211_fragment_element(skb, subelem_len, 2155 IEEE80211_MLE_SUBELEM_FRAGMENT); 2156 } 2157 2158 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2159 } 2160 2161 static int 2162 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2163 enum nl80211_iftype iftype, 2164 struct cfg80211_bss *cbss, 2165 size_t elems_len) 2166 { 2167 struct ieee80211_local *local = sdata->local; 2168 const struct ieee80211_sband_iftype_data *iftd; 2169 struct ieee80211_supported_band *sband; 2170 size_t size = 0; 2171 2172 if (!cbss) 2173 return size; 2174 2175 sband = local->hw.wiphy->bands[cbss->channel->band]; 2176 2177 /* add STA profile elements length */ 2178 size += elems_len; 2179 2180 /* and supported rates length */ 2181 size += 4 + sband->n_bitrates; 2182 2183 /* supported channels */ 2184 size += 2 + 2 * sband->n_channels; 2185 2186 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2187 if (iftd) 2188 size += iftd->vendor_elems.len; 2189 2190 /* power capability */ 2191 size += 4; 2192 2193 /* HT, VHT, HE, EHT */ 2194 size += 2 + sizeof(struct ieee80211_ht_cap); 2195 size += 2 + sizeof(struct ieee80211_vht_cap); 2196 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2197 sizeof(struct ieee80211_he_mcs_nss_supp) + 2198 IEEE80211_HE_PPE_THRES_MAX_LEN; 2199 2200 if (sband->band == NL80211_BAND_6GHZ) { 2201 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2202 /* reg connection */ 2203 size += 4; 2204 } 2205 2206 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2207 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2208 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2209 2210 size += 2 + 1 + sizeof(struct ieee80211_uhr_cap) + 2211 sizeof(struct ieee80211_uhr_cap_phy); 2212 2213 return size; 2214 } 2215 2216 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2217 { 2218 struct ieee80211_local *local = sdata->local; 2219 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2220 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2221 struct ieee80211_link_data *link; 2222 struct sk_buff *skb; 2223 struct ieee80211_mgmt *mgmt; 2224 u8 *pos, qos_info, *ie_start; 2225 size_t offset, noffset; 2226 u16 capab = 0, link_capab; 2227 __le16 listen_int; 2228 struct element *ext_capa = NULL; 2229 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2230 struct ieee80211_prep_tx_info info = {}; 2231 unsigned int link_id, n_links = 0; 2232 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2233 struct sta_info *sta; 2234 bool assoc_encrypt; 2235 void *capab_pos; 2236 size_t size; 2237 int ret; 2238 2239 /* we know it's writable, cast away the const */ 2240 if (assoc_data->ie_len) 2241 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2242 assoc_data->ie, 2243 assoc_data->ie_len); 2244 2245 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2246 2247 size = local->hw.extra_tx_headroom + 2248 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2249 2 + assoc_data->ssid_len + /* SSID */ 2250 assoc_data->ie_len + /* extra IEs */ 2251 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2252 9; /* WMM */ 2253 2254 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2255 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2256 size_t elems_len = assoc_data->link[link_id].elems_len; 2257 2258 if (!cbss) 2259 continue; 2260 2261 n_links++; 2262 2263 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2264 elems_len); 2265 2266 /* non-inheritance element */ 2267 size += 2 + 2 + PRESENT_ELEMS_MAX; 2268 2269 /* should be the same across all BSSes */ 2270 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2271 capab |= WLAN_CAPABILITY_PRIVACY; 2272 } 2273 2274 if (ieee80211_vif_is_mld(&sdata->vif)) { 2275 /* consider the multi-link element with STA profile */ 2276 size += sizeof(struct ieee80211_multi_link_elem); 2277 /* max common info field in basic multi-link element */ 2278 size += sizeof(struct ieee80211_mle_basic_common_info) + 2279 2 + /* capa & op */ 2280 2 + /* ext capa & op */ 2281 2; /* EML capa */ 2282 2283 /* The capability elements were already considered above */ 2284 size += (n_links - 1) * 2285 (1 + 1 + /* subelement ID/length */ 2286 2 + /* STA control */ 2287 1 + ETH_ALEN + 2 /* STA Info field */); 2288 } 2289 2290 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2291 if (WARN_ON(!link)) 2292 return -EINVAL; 2293 2294 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2295 return -EINVAL; 2296 2297 skb = alloc_skb(size, GFP_KERNEL); 2298 if (!skb) 2299 return -ENOMEM; 2300 2301 skb_reserve(skb, local->hw.extra_tx_headroom); 2302 2303 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2304 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2305 2306 /* Set MBSSID support for HE AP if needed */ 2307 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2308 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2309 ext_capa && ext_capa->datalen >= 3) 2310 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2311 2312 mgmt = skb_put_zero(skb, 24); 2313 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2314 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2315 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2316 2317 listen_int = cpu_to_le16(assoc_data->s1g ? 2318 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2319 local->hw.conf.listen_interval); 2320 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2321 skb_put(skb, 10); 2322 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2323 IEEE80211_STYPE_REASSOC_REQ); 2324 capab_pos = &mgmt->u.reassoc_req.capab_info; 2325 mgmt->u.reassoc_req.listen_interval = listen_int; 2326 memcpy(mgmt->u.reassoc_req.current_ap, 2327 assoc_data->prev_ap_addr, ETH_ALEN); 2328 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2329 } else { 2330 skb_put(skb, 4); 2331 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2332 IEEE80211_STYPE_ASSOC_REQ); 2333 capab_pos = &mgmt->u.assoc_req.capab_info; 2334 mgmt->u.assoc_req.listen_interval = listen_int; 2335 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2336 } 2337 2338 /* SSID */ 2339 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2340 ie_start = pos; 2341 *pos++ = WLAN_EID_SSID; 2342 *pos++ = assoc_data->ssid_len; 2343 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2344 2345 /* 2346 * This bit is technically reserved, so it shouldn't matter for either 2347 * the AP or us, but it also means we shouldn't set it. However, we've 2348 * always set it in the past, and apparently some EHT APs check that 2349 * we don't set it. To avoid interoperability issues with old APs that 2350 * for some reason check it and want it to be set, set the bit for all 2351 * pre-EHT connections as we used to do. 2352 */ 2353 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2354 !ieee80211_hw_check(&local->hw, STRICT)) 2355 capab |= WLAN_CAPABILITY_ESS; 2356 2357 /* add the elements for the assoc (main) link */ 2358 link_capab = capab; 2359 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2360 ext_capa, 2361 assoc_data->ie, 2362 assoc_data->ie_len, 2363 assoc_data->assoc_link_id, link, 2364 present_elems, assoc_data); 2365 put_unaligned_le16(link_capab, capab_pos); 2366 2367 /* if present, add any custom non-vendor IEs */ 2368 if (assoc_data->ie_len) { 2369 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2370 assoc_data->ie_len, 2371 offset); 2372 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2373 offset = noffset; 2374 } 2375 2376 if (assoc_data->wmm) { 2377 if (assoc_data->uapsd) { 2378 qos_info = ifmgd->uapsd_queues; 2379 qos_info |= (ifmgd->uapsd_max_sp_len << 2380 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2381 } else { 2382 qos_info = 0; 2383 } 2384 2385 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2386 } 2387 2388 /* add any remaining custom (i.e. vendor specific here) IEs */ 2389 if (assoc_data->ie_len) { 2390 noffset = assoc_data->ie_len; 2391 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2392 } 2393 2394 if (assoc_data->fils_kek_len) { 2395 ret = fils_encrypt_assoc_req(skb, assoc_data); 2396 if (ret < 0) { 2397 dev_kfree_skb(skb); 2398 return ret; 2399 } 2400 } 2401 2402 pos = skb_tail_pointer(skb); 2403 kfree(ifmgd->assoc_req_ies); 2404 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2405 if (!ifmgd->assoc_req_ies) { 2406 dev_kfree_skb(skb); 2407 return -ENOMEM; 2408 } 2409 2410 ifmgd->assoc_req_ies_len = pos - ie_start; 2411 2412 info.link_id = assoc_data->assoc_link_id; 2413 drv_mgd_prepare_tx(local, sdata, &info); 2414 2415 sta = sta_info_get_bss(sdata, sdata->vif.cfg.ap_addr); 2416 2417 assoc_encrypt = sta && sta->sta.epp_peer && 2418 wiphy_dereference(sdata->local->hw.wiphy, 2419 sta->ptk[sta->ptk_idx]); 2420 2421 if (!assoc_encrypt) 2422 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2423 2424 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2425 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2426 IEEE80211_TX_INTFL_MLME_CONN_TX; 2427 ieee80211_tx_skb(sdata, skb); 2428 2429 return 0; 2430 } 2431 2432 void ieee80211_send_pspoll(struct ieee80211_local *local, 2433 struct ieee80211_sub_if_data *sdata) 2434 { 2435 struct ieee80211_pspoll *pspoll; 2436 struct sk_buff *skb; 2437 2438 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2439 if (!skb) 2440 return; 2441 2442 pspoll = (struct ieee80211_pspoll *) skb->data; 2443 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2444 2445 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2446 ieee80211_tx_skb(sdata, skb); 2447 } 2448 2449 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2450 struct ieee80211_sub_if_data *sdata, 2451 bool powersave) 2452 { 2453 struct sk_buff *skb; 2454 struct ieee80211_hdr_3addr *nullfunc; 2455 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2456 2457 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2458 !ieee80211_hw_check(&local->hw, 2459 DOESNT_SUPPORT_QOS_NDP)); 2460 if (!skb) 2461 return; 2462 2463 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2464 if (powersave) 2465 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2466 2467 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2468 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2469 2470 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2471 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2472 2473 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2474 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2475 2476 ieee80211_tx_skb(sdata, skb); 2477 } 2478 2479 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2480 struct ieee80211_sub_if_data *sdata) 2481 { 2482 struct sk_buff *skb; 2483 struct ieee80211_hdr *nullfunc; 2484 __le16 fc; 2485 2486 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2487 return; 2488 2489 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2490 if (!skb) 2491 return; 2492 2493 skb_reserve(skb, local->hw.extra_tx_headroom); 2494 2495 nullfunc = skb_put_zero(skb, 30); 2496 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2497 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2498 nullfunc->frame_control = fc; 2499 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2500 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2501 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2502 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2503 2504 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2505 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2506 ieee80211_tx_skb(sdata, skb); 2507 } 2508 2509 /* spectrum management related things */ 2510 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2511 struct wiphy_work *work) 2512 { 2513 struct ieee80211_link_data *link = 2514 container_of(work, struct ieee80211_link_data, 2515 u.mgd.csa.switch_work.work); 2516 struct ieee80211_sub_if_data *sdata = link->sdata; 2517 struct ieee80211_local *local = sdata->local; 2518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2519 int ret; 2520 2521 if (!ieee80211_sdata_running(sdata)) 2522 return; 2523 2524 lockdep_assert_wiphy(local->hw.wiphy); 2525 2526 if (!ifmgd->associated) 2527 return; 2528 2529 if (!link->conf->csa_active) 2530 return; 2531 2532 /* 2533 * If the link isn't active (now), we cannot wait for beacons, won't 2534 * have a reserved chanctx, etc. Just switch over the chandef and 2535 * update cfg80211 directly. 2536 */ 2537 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2538 struct link_sta_info *link_sta; 2539 struct sta_info *ap_sta; 2540 2541 link->conf->chanreq = link->csa.chanreq; 2542 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2543 link->link_id); 2544 link->conf->csa_active = false; 2545 2546 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2547 if (WARN_ON(!ap_sta)) 2548 return; 2549 2550 link_sta = wiphy_dereference(wiphy, 2551 ap_sta->link[link->link_id]); 2552 if (WARN_ON(!link_sta)) 2553 return; 2554 2555 link_sta->pub->bandwidth = 2556 _ieee80211_sta_cur_vht_bw(link_sta, 2557 &link->csa.chanreq.oper); 2558 return; 2559 } 2560 2561 /* 2562 * using reservation isn't immediate as it may be deferred until later 2563 * with multi-vif. once reservation is complete it will re-schedule the 2564 * work with no reserved_chanctx so verify chandef to check if it 2565 * completed successfully 2566 */ 2567 2568 if (link->reserved_chanctx) { 2569 /* 2570 * with multi-vif csa driver may call ieee80211_csa_finish() 2571 * many times while waiting for other interfaces to use their 2572 * reservations 2573 */ 2574 if (link->reserved_ready) 2575 return; 2576 2577 ret = ieee80211_link_use_reserved_context(link); 2578 if (ret) { 2579 link_info(link, 2580 "failed to use reserved channel context, disconnecting (err=%d)\n", 2581 ret); 2582 wiphy_work_queue(sdata->local->hw.wiphy, 2583 &ifmgd->csa_connection_drop_work); 2584 } 2585 return; 2586 } 2587 2588 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2589 &link->csa.chanreq)) { 2590 link_info(link, 2591 "failed to finalize channel switch, disconnecting\n"); 2592 wiphy_work_queue(sdata->local->hw.wiphy, 2593 &ifmgd->csa_connection_drop_work); 2594 return; 2595 } 2596 2597 link->u.mgd.csa.waiting_bcn = true; 2598 2599 /* 2600 * The next beacon really should always be different, so this should 2601 * have no effect whatsoever. However, some APs (we observed this in 2602 * an Asus AXE11000), the beacon after the CSA might be identical to 2603 * the last beacon on the old channel - in this case we'd ignore it. 2604 * Resetting the CRC will lead us to handle it better (albeit with a 2605 * disconnect, but clearly the AP is broken.) 2606 */ 2607 link->u.mgd.beacon_crc_valid = false; 2608 2609 /* apply new TPE restrictions immediately on the new channel */ 2610 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2611 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2612 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2613 &link->u.mgd.csa.ap_chandef, 2614 &link->conf->chanreq.oper); 2615 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2616 sizeof(link->u.mgd.csa.tpe))) { 2617 link->conf->tpe = link->u.mgd.csa.tpe; 2618 ieee80211_link_info_change_notify(sdata, link, 2619 BSS_CHANGED_TPE); 2620 } 2621 } 2622 2623 /* 2624 * It is not necessary to reset these timers if any link does not 2625 * have an active CSA and that link still receives the beacons 2626 * when other links have active CSA. 2627 */ 2628 for_each_link_data(sdata, link) { 2629 if (!link->conf->csa_active) 2630 return; 2631 } 2632 2633 /* 2634 * Reset the beacon monitor and connection monitor timers when CSA 2635 * is active for all links in MLO when channel switch occurs in all 2636 * the links. 2637 */ 2638 ieee80211_sta_reset_beacon_monitor(sdata); 2639 ieee80211_sta_reset_conn_monitor(sdata); 2640 } 2641 2642 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2643 { 2644 struct ieee80211_sub_if_data *sdata = link->sdata; 2645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2646 int ret; 2647 2648 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2649 2650 WARN_ON(!link->conf->csa_active); 2651 2652 ieee80211_vif_unblock_queues_csa(sdata); 2653 2654 link->conf->csa_active = false; 2655 link->u.mgd.csa.blocked_tx = false; 2656 link->u.mgd.csa.waiting_bcn = false; 2657 2658 ret = drv_post_channel_switch(link); 2659 if (ret) { 2660 link_info(link, 2661 "driver post channel switch failed, disconnecting\n"); 2662 wiphy_work_queue(sdata->local->hw.wiphy, 2663 &ifmgd->csa_connection_drop_work); 2664 return; 2665 } 2666 2667 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2668 link->link_id); 2669 } 2670 2671 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2672 unsigned int link_id) 2673 { 2674 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2675 2676 trace_api_chswitch_done(sdata, success, link_id); 2677 2678 rcu_read_lock(); 2679 2680 if (!success) { 2681 sdata_info(sdata, 2682 "driver channel switch failed (link %d), disconnecting\n", 2683 link_id); 2684 wiphy_work_queue(sdata->local->hw.wiphy, 2685 &sdata->u.mgd.csa_connection_drop_work); 2686 } else { 2687 struct ieee80211_link_data *link = 2688 rcu_dereference(sdata->link[link_id]); 2689 2690 if (WARN_ON(!link)) { 2691 rcu_read_unlock(); 2692 return; 2693 } 2694 2695 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 2696 &link->u.mgd.csa.switch_work, 0); 2697 } 2698 2699 rcu_read_unlock(); 2700 } 2701 EXPORT_SYMBOL(ieee80211_chswitch_done); 2702 2703 static void 2704 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2705 { 2706 struct ieee80211_sub_if_data *sdata = link->sdata; 2707 struct ieee80211_local *local = sdata->local; 2708 2709 lockdep_assert_wiphy(local->hw.wiphy); 2710 2711 if (!local->ops->abort_channel_switch) 2712 return; 2713 2714 if (rcu_access_pointer(link->conf->chanctx_conf)) 2715 ieee80211_link_unreserve_chanctx(link); 2716 2717 ieee80211_vif_unblock_queues_csa(sdata); 2718 2719 link->conf->csa_active = false; 2720 link->u.mgd.csa.blocked_tx = false; 2721 2722 drv_abort_channel_switch(link); 2723 } 2724 2725 struct sta_csa_rnr_iter_data { 2726 struct ieee80211_link_data *link; 2727 struct ieee80211_channel *chan; 2728 u8 mld_id; 2729 }; 2730 2731 static enum cfg80211_rnr_iter_ret 2732 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2733 const struct ieee80211_neighbor_ap_info *info, 2734 const u8 *tbtt_info, u8 tbtt_info_len) 2735 { 2736 struct sta_csa_rnr_iter_data *data = _data; 2737 struct ieee80211_link_data *link = data->link; 2738 struct ieee80211_sub_if_data *sdata = link->sdata; 2739 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2740 const struct ieee80211_tbtt_info_ge_11 *ti; 2741 enum nl80211_band band; 2742 unsigned int center_freq; 2743 int link_id; 2744 2745 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2746 return RNR_ITER_CONTINUE; 2747 2748 if (tbtt_info_len < sizeof(*ti)) 2749 return RNR_ITER_CONTINUE; 2750 2751 ti = (const void *)tbtt_info; 2752 2753 if (ti->mld_params.mld_id != data->mld_id) 2754 return RNR_ITER_CONTINUE; 2755 2756 link_id = le16_get_bits(ti->mld_params.params, 2757 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2758 if (link_id != data->link->link_id) 2759 return RNR_ITER_CONTINUE; 2760 2761 /* we found the entry for our link! */ 2762 2763 /* this AP is confused, it had this right before ... just disconnect */ 2764 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2765 link_info(link, 2766 "AP now has invalid operating class in RNR, disconnect\n"); 2767 wiphy_work_queue(sdata->local->hw.wiphy, 2768 &ifmgd->csa_connection_drop_work); 2769 return RNR_ITER_BREAK; 2770 } 2771 2772 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2773 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2774 2775 return RNR_ITER_BREAK; 2776 } 2777 2778 static void 2779 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2780 struct ieee802_11_elems *elems) 2781 { 2782 struct ieee80211_sub_if_data *sdata = link->sdata; 2783 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2784 struct sta_csa_rnr_iter_data data = { 2785 .link = link, 2786 }; 2787 2788 /* 2789 * If we get here, we see a beacon from another link without 2790 * CSA still being reported for it, so now we have to check 2791 * if the CSA was aborted or completed. This may not even be 2792 * perfectly possible if the CSA was only done for changing 2793 * the puncturing, but in that case if the link in inactive 2794 * we don't really care, and if it's an active link (or when 2795 * it's activated later) we'll get a beacon and adjust. 2796 */ 2797 2798 if (WARN_ON(!elems->ml_basic)) 2799 return; 2800 2801 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2802 2803 /* 2804 * So in order to do this, iterate the RNR element(s) and see 2805 * what channel is reported now. 2806 */ 2807 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2808 ieee80211_sta_csa_rnr_iter, &data); 2809 2810 if (!data.chan) { 2811 link_info(link, 2812 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2813 wiphy_work_queue(sdata->local->hw.wiphy, 2814 &ifmgd->csa_connection_drop_work); 2815 return; 2816 } 2817 2818 /* 2819 * If it doesn't match the CSA, then assume it aborted. This 2820 * may erroneously detect that it was _not_ aborted when it 2821 * was in fact aborted, but only changed the bandwidth or the 2822 * puncturing configuration, but we don't have enough data to 2823 * detect that. 2824 */ 2825 if (data.chan != link->csa.chanreq.oper.chan) 2826 ieee80211_sta_abort_chanswitch(link); 2827 } 2828 2829 enum ieee80211_csa_source { 2830 IEEE80211_CSA_SOURCE_BEACON, 2831 IEEE80211_CSA_SOURCE_OTHER_LINK, 2832 IEEE80211_CSA_SOURCE_PROT_ACTION, 2833 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2834 }; 2835 2836 static void 2837 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2838 u64 timestamp, u32 device_timestamp, 2839 struct ieee802_11_elems *full_elems, 2840 struct ieee802_11_elems *csa_elems, 2841 enum ieee80211_csa_source source) 2842 { 2843 struct ieee80211_sub_if_data *sdata = link->sdata; 2844 struct ieee80211_local *local = sdata->local; 2845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2846 struct ieee80211_chanctx *chanctx = NULL; 2847 struct ieee80211_chanctx_conf *conf; 2848 struct ieee80211_csa_ie csa_ie = {}; 2849 struct ieee80211_channel_switch ch_switch = { 2850 .link_id = link->link_id, 2851 .timestamp = timestamp, 2852 .device_timestamp = device_timestamp, 2853 }; 2854 u32 csa_time_tu; 2855 ktime_t now; 2856 int res; 2857 2858 lockdep_assert_wiphy(local->hw.wiphy); 2859 2860 if (csa_elems) { 2861 struct cfg80211_bss *cbss = link->conf->bss; 2862 enum nl80211_band current_band; 2863 struct ieee80211_bss *bss; 2864 2865 if (WARN_ON(!cbss)) 2866 return; 2867 2868 current_band = cbss->channel->band; 2869 bss = (void *)cbss->priv; 2870 2871 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2872 current_band, 2873 bss->vht_cap_info, 2874 &link->u.mgd.conn, 2875 link->u.mgd.bssid, 2876 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2877 &csa_ie); 2878 if (res == 0) { 2879 ch_switch.block_tx = csa_ie.mode; 2880 ch_switch.chandef = csa_ie.chanreq.oper; 2881 ch_switch.count = csa_ie.count; 2882 ch_switch.delay = csa_ie.max_switch_time; 2883 } 2884 2885 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2886 } else { 2887 /* 2888 * If there was no per-STA profile for this link, we 2889 * get called with csa_elems == NULL. This of course means 2890 * there are no CSA elements, so set res=1 indicating 2891 * no more CSA. 2892 */ 2893 res = 1; 2894 } 2895 2896 if (res < 0) { 2897 /* ignore this case, not a protected frame */ 2898 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2899 return; 2900 goto drop_connection; 2901 } 2902 2903 if (link->conf->csa_active) { 2904 switch (source) { 2905 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2906 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2907 /* already processing - disregard action frames */ 2908 return; 2909 case IEEE80211_CSA_SOURCE_BEACON: 2910 if (link->u.mgd.csa.waiting_bcn) { 2911 ieee80211_chswitch_post_beacon(link); 2912 /* 2913 * If the CSA is still present after the switch 2914 * we need to consider it as a new CSA (possibly 2915 * to self). This happens by not returning here 2916 * so we'll get to the check below. 2917 */ 2918 } else if (res) { 2919 ieee80211_sta_abort_chanswitch(link); 2920 return; 2921 } else { 2922 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2923 return; 2924 } 2925 break; 2926 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2927 /* active link: we want to see the beacon to continue */ 2928 if (ieee80211_vif_link_active(&sdata->vif, 2929 link->link_id)) 2930 return; 2931 2932 /* switch work ran, so just complete the process */ 2933 if (link->u.mgd.csa.waiting_bcn) { 2934 ieee80211_chswitch_post_beacon(link); 2935 /* 2936 * If the CSA is still present after the switch 2937 * we need to consider it as a new CSA (possibly 2938 * to self). This happens by not returning here 2939 * so we'll get to the check below. 2940 */ 2941 break; 2942 } 2943 2944 /* link still has CSA but we already know, do nothing */ 2945 if (!res) 2946 return; 2947 2948 /* check in the RNR if the CSA aborted */ 2949 ieee80211_sta_other_link_csa_disappeared(link, 2950 full_elems); 2951 return; 2952 } 2953 } 2954 2955 /* no active CSA nor a new one */ 2956 if (res) { 2957 /* 2958 * However, we may have stopped queues when receiving a public 2959 * action frame that couldn't be protected, if it had the quiet 2960 * bit set. This is a trade-off, we want to be quiet as soon as 2961 * possible, but also don't trust the public action frame much, 2962 * as it can't be protected. 2963 */ 2964 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2965 link->u.mgd.csa.blocked_tx = false; 2966 ieee80211_vif_unblock_queues_csa(sdata); 2967 } 2968 return; 2969 } 2970 2971 /* 2972 * We don't really trust public action frames, but block queues (go to 2973 * quiet mode) for them anyway, we should get a beacon soon to either 2974 * know what the CSA really is, or figure out the public action frame 2975 * was actually an attack. 2976 */ 2977 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2978 if (csa_ie.mode) { 2979 link->u.mgd.csa.blocked_tx = true; 2980 ieee80211_vif_block_queues_csa(sdata); 2981 } 2982 return; 2983 } 2984 2985 if (link->conf->chanreq.oper.chan->band != 2986 csa_ie.chanreq.oper.chan->band) { 2987 link_info(link, 2988 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2989 link->u.mgd.bssid, 2990 csa_ie.chanreq.oper.chan->center_freq, 2991 csa_ie.chanreq.oper.width, 2992 csa_ie.chanreq.oper.center_freq1, 2993 csa_ie.chanreq.oper.center_freq2); 2994 goto drop_connection; 2995 } 2996 2997 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2998 IEEE80211_CHAN_DISABLED)) { 2999 link_info(link, 3000 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 3001 link->u.mgd.bssid, 3002 csa_ie.chanreq.oper.chan->center_freq, 3003 csa_ie.chanreq.oper.chan->freq_offset, 3004 csa_ie.chanreq.oper.width, 3005 csa_ie.chanreq.oper.center_freq1, 3006 csa_ie.chanreq.oper.freq1_offset, 3007 csa_ie.chanreq.oper.center_freq2); 3008 goto drop_connection; 3009 } 3010 3011 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 3012 &link->conf->chanreq.oper) && 3013 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 3014 if (link->u.mgd.csa.ignored_same_chan) 3015 return; 3016 link_info(link, 3017 "AP %pM tries to chanswitch to same channel, ignore\n", 3018 link->u.mgd.bssid); 3019 link->u.mgd.csa.ignored_same_chan = true; 3020 return; 3021 } 3022 3023 /* 3024 * Drop all TDLS peers on the affected link - either we disconnect or 3025 * move to a different channel from this point on. There's no telling 3026 * what our peer will do. 3027 * The TDLS WIDER_BW scenario is also problematic, as peers might now 3028 * have an incompatible wider chandef. 3029 */ 3030 ieee80211_teardown_tdls_peers(link); 3031 3032 conf = rcu_dereference_protected(link->conf->chanctx_conf, 3033 lockdep_is_held(&local->hw.wiphy->mtx)); 3034 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 3035 link_info(link, 3036 "no channel context assigned to vif?, disconnecting\n"); 3037 goto drop_connection; 3038 } 3039 3040 if (conf) 3041 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 3042 3043 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 3044 link_info(link, 3045 "driver doesn't support chan-switch with channel contexts\n"); 3046 goto drop_connection; 3047 } 3048 3049 if (drv_pre_channel_switch(sdata, &ch_switch)) { 3050 link_info(link, 3051 "preparing for channel switch failed, disconnecting\n"); 3052 goto drop_connection; 3053 } 3054 3055 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 3056 3057 link->csa.chanreq.oper = csa_ie.chanreq.oper; 3058 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 3059 &csa_ie.chanreq.ap); 3060 3061 if (chanctx) { 3062 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 3063 chanctx->mode, false); 3064 if (res) { 3065 link_info(link, 3066 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 3067 res); 3068 goto drop_connection; 3069 } 3070 } 3071 3072 link->conf->csa_active = true; 3073 link->u.mgd.csa.ignored_same_chan = false; 3074 link->u.mgd.beacon_crc_valid = false; 3075 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3076 3077 if (csa_ie.mode) 3078 ieee80211_vif_block_queues_csa(sdata); 3079 3080 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 3081 link->link_id, csa_ie.count, 3082 csa_ie.mode); 3083 3084 /* we may have to handle timeout for deactivated link in software */ 3085 now = ktime_get_boottime(); 3086 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 3087 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 3088 3089 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3090 local->ops->channel_switch) { 3091 /* 3092 * Use driver's channel switch callback, the driver will 3093 * later call ieee80211_chswitch_done(). It may deactivate 3094 * the link as well, we handle that elsewhere and queue 3095 * the csa.switch_work for the calculated time then. 3096 */ 3097 drv_channel_switch(local, sdata, &ch_switch); 3098 return; 3099 } 3100 3101 /* channel switch handled in software */ 3102 wiphy_hrtimer_work_queue(local->hw.wiphy, 3103 &link->u.mgd.csa.switch_work, 3104 link->u.mgd.csa.time - now); 3105 return; 3106 drop_connection: 3107 /* 3108 * This is just so that the disconnect flow will know that 3109 * we were trying to switch channel and failed. In case the 3110 * mode is 1 (we are not allowed to Tx), we will know not to 3111 * send a deauthentication frame. Those two fields will be 3112 * reset when the disconnection worker runs. 3113 */ 3114 link->conf->csa_active = true; 3115 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3116 3117 wiphy_work_queue(sdata->local->hw.wiphy, 3118 &ifmgd->csa_connection_drop_work); 3119 } 3120 3121 struct sta_bss_param_ch_cnt_data { 3122 struct ieee80211_sub_if_data *sdata; 3123 u8 reporting_link_id; 3124 u8 mld_id; 3125 }; 3126 3127 static enum cfg80211_rnr_iter_ret 3128 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3129 const struct ieee80211_neighbor_ap_info *info, 3130 const u8 *tbtt_info, u8 tbtt_info_len) 3131 { 3132 struct sta_bss_param_ch_cnt_data *data = _data; 3133 struct ieee80211_sub_if_data *sdata = data->sdata; 3134 const struct ieee80211_tbtt_info_ge_11 *ti; 3135 u8 bss_param_ch_cnt; 3136 int link_id; 3137 3138 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3139 return RNR_ITER_CONTINUE; 3140 3141 if (tbtt_info_len < sizeof(*ti)) 3142 return RNR_ITER_CONTINUE; 3143 3144 ti = (const void *)tbtt_info; 3145 3146 if (ti->mld_params.mld_id != data->mld_id) 3147 return RNR_ITER_CONTINUE; 3148 3149 link_id = le16_get_bits(ti->mld_params.params, 3150 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3151 bss_param_ch_cnt = 3152 le16_get_bits(ti->mld_params.params, 3153 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3154 3155 if (bss_param_ch_cnt != 255 && 3156 link_id < ARRAY_SIZE(sdata->link)) { 3157 struct ieee80211_link_data *link = 3158 sdata_dereference(sdata->link[link_id], sdata); 3159 3160 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3161 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3162 link->conf->bss_param_ch_cnt_link_id = 3163 data->reporting_link_id; 3164 } 3165 } 3166 3167 return RNR_ITER_CONTINUE; 3168 } 3169 3170 static void 3171 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3172 struct ieee80211_bss_conf *bss_conf, 3173 struct ieee802_11_elems *elems) 3174 { 3175 struct sta_bss_param_ch_cnt_data data = { 3176 .reporting_link_id = bss_conf->link_id, 3177 .sdata = sdata, 3178 }; 3179 int bss_param_ch_cnt; 3180 3181 if (!elems->ml_basic) 3182 return; 3183 3184 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3185 3186 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3187 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3188 3189 bss_param_ch_cnt = 3190 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3191 3192 /* 3193 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3194 * didn't change to indicate that we got a beacon on our own 3195 * link. 3196 */ 3197 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3198 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3199 bss_conf->bss_param_ch_cnt_link_id = 3200 bss_conf->link_id; 3201 } 3202 } 3203 3204 static bool 3205 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3206 const u8 *country_ie, u8 country_ie_len, 3207 const u8 *pwr_constr_elem, 3208 int *chan_pwr, int *pwr_reduction) 3209 { 3210 struct ieee80211_country_ie_triplet *triplet; 3211 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3212 int i, chan_increment; 3213 bool have_chan_pwr = false; 3214 3215 /* Invalid IE */ 3216 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3217 return false; 3218 3219 triplet = (void *)(country_ie + 3); 3220 country_ie_len -= 3; 3221 3222 switch (channel->band) { 3223 default: 3224 WARN_ON_ONCE(1); 3225 fallthrough; 3226 case NL80211_BAND_2GHZ: 3227 case NL80211_BAND_60GHZ: 3228 case NL80211_BAND_LC: 3229 chan_increment = 1; 3230 break; 3231 case NL80211_BAND_5GHZ: 3232 chan_increment = 4; 3233 break; 3234 case NL80211_BAND_6GHZ: 3235 /* 3236 * In the 6 GHz band, the "maximum transmit power level" 3237 * field in the triplets is reserved, and thus will be 3238 * zero and we shouldn't use it to control TX power. 3239 * The actual TX power will be given in the transmit 3240 * power envelope element instead. 3241 */ 3242 return false; 3243 } 3244 3245 /* find channel */ 3246 while (country_ie_len >= 3) { 3247 u8 first_channel = triplet->chans.first_channel; 3248 3249 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3250 goto next; 3251 3252 for (i = 0; i < triplet->chans.num_channels; i++) { 3253 if (first_channel + i * chan_increment == chan) { 3254 have_chan_pwr = true; 3255 *chan_pwr = triplet->chans.max_power; 3256 break; 3257 } 3258 } 3259 if (have_chan_pwr) 3260 break; 3261 3262 next: 3263 triplet++; 3264 country_ie_len -= 3; 3265 } 3266 3267 if (have_chan_pwr && pwr_constr_elem) 3268 *pwr_reduction = *pwr_constr_elem; 3269 else 3270 *pwr_reduction = 0; 3271 3272 return have_chan_pwr; 3273 } 3274 3275 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3276 const u8 *cisco_dtpc_ie, 3277 int *pwr_level) 3278 { 3279 /* From practical testing, the first data byte of the DTPC element 3280 * seems to contain the requested dBm level, and the CLI on Cisco 3281 * APs clearly state the range is -127 to 127 dBm, which indicates 3282 * a signed byte, although it seemingly never actually goes negative. 3283 * The other byte seems to always be zero. 3284 */ 3285 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3286 } 3287 3288 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3289 struct ieee80211_channel *channel, 3290 struct ieee80211_mgmt *mgmt, 3291 const u8 *country_ie, u8 country_ie_len, 3292 const u8 *pwr_constr_ie, 3293 const u8 *cisco_dtpc_ie) 3294 { 3295 struct ieee80211_sub_if_data *sdata = link->sdata; 3296 bool has_80211h_pwr = false, has_cisco_pwr = false; 3297 int chan_pwr = 0, pwr_reduction_80211h = 0; 3298 int pwr_level_cisco, pwr_level_80211h; 3299 int new_ap_level; 3300 __le16 capab = mgmt->u.probe_resp.capab_info; 3301 3302 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3303 return 0; /* TODO */ 3304 3305 if (country_ie && 3306 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3307 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3308 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3309 channel, country_ie, country_ie_len, 3310 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3311 pwr_level_80211h = 3312 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3313 } 3314 3315 if (cisco_dtpc_ie) { 3316 ieee80211_find_cisco_dtpc( 3317 channel, cisco_dtpc_ie, &pwr_level_cisco); 3318 has_cisco_pwr = true; 3319 } 3320 3321 if (!has_80211h_pwr && !has_cisco_pwr) 3322 return 0; 3323 3324 /* If we have both 802.11h and Cisco DTPC, apply both limits 3325 * by picking the smallest of the two power levels advertised. 3326 */ 3327 if (has_80211h_pwr && 3328 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3329 new_ap_level = pwr_level_80211h; 3330 3331 if (link->ap_power_level == new_ap_level) 3332 return 0; 3333 3334 sdata_dbg(sdata, 3335 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3336 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3337 link->u.mgd.bssid); 3338 } else { /* has_cisco_pwr is always true here. */ 3339 new_ap_level = pwr_level_cisco; 3340 3341 if (link->ap_power_level == new_ap_level) 3342 return 0; 3343 3344 sdata_dbg(sdata, 3345 "Limiting TX power to %d dBm as advertised by %pM\n", 3346 pwr_level_cisco, link->u.mgd.bssid); 3347 } 3348 3349 link->ap_power_level = new_ap_level; 3350 if (__ieee80211_recalc_txpower(link)) 3351 return BSS_CHANGED_TXPOWER; 3352 return 0; 3353 } 3354 3355 /* powersave */ 3356 static void ieee80211_enable_ps(struct ieee80211_local *local, 3357 struct ieee80211_sub_if_data *sdata) 3358 { 3359 struct ieee80211_conf *conf = &local->hw.conf; 3360 3361 /* 3362 * If we are scanning right now then the parameters will 3363 * take effect when scan finishes. 3364 */ 3365 if (local->scanning) 3366 return; 3367 3368 if (conf->dynamic_ps_timeout > 0 && 3369 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3370 mod_timer(&local->dynamic_ps_timer, jiffies + 3371 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3372 } else { 3373 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3374 ieee80211_send_nullfunc(local, sdata, true); 3375 3376 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3377 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3378 return; 3379 3380 conf->flags |= IEEE80211_CONF_PS; 3381 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3382 } 3383 } 3384 3385 static void ieee80211_change_ps(struct ieee80211_local *local) 3386 { 3387 struct ieee80211_conf *conf = &local->hw.conf; 3388 3389 if (local->ps_sdata) { 3390 ieee80211_enable_ps(local, local->ps_sdata); 3391 } else if (conf->flags & IEEE80211_CONF_PS) { 3392 conf->flags &= ~IEEE80211_CONF_PS; 3393 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3394 timer_delete_sync(&local->dynamic_ps_timer); 3395 wiphy_work_cancel(local->hw.wiphy, 3396 &local->dynamic_ps_enable_work); 3397 } 3398 } 3399 3400 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3401 { 3402 struct ieee80211_local *local = sdata->local; 3403 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3404 struct sta_info *sta = NULL; 3405 bool authorized = false; 3406 3407 if (!mgd->powersave) 3408 return false; 3409 3410 if (mgd->broken_ap) 3411 return false; 3412 3413 if (!mgd->associated) 3414 return false; 3415 3416 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3417 return false; 3418 3419 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3420 !sdata->deflink.u.mgd.have_beacon) 3421 return false; 3422 3423 rcu_read_lock(); 3424 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3425 if (sta) 3426 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3427 rcu_read_unlock(); 3428 3429 return authorized; 3430 } 3431 3432 /* need to hold RTNL or interface lock */ 3433 void ieee80211_recalc_ps(struct ieee80211_local *local) 3434 { 3435 struct ieee80211_sub_if_data *sdata, *found = NULL; 3436 int count = 0; 3437 int timeout; 3438 3439 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3440 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3441 local->ps_sdata = NULL; 3442 return; 3443 } 3444 3445 list_for_each_entry(sdata, &local->interfaces, list) { 3446 if (!ieee80211_sdata_running(sdata)) 3447 continue; 3448 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3449 /* If an AP vif is found, then disable PS 3450 * by setting the count to zero thereby setting 3451 * ps_sdata to NULL. 3452 */ 3453 count = 0; 3454 break; 3455 } 3456 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3457 continue; 3458 found = sdata; 3459 count++; 3460 } 3461 3462 if (count == 1 && ieee80211_powersave_allowed(found)) { 3463 u8 dtimper = found->deflink.u.mgd.dtim_period; 3464 3465 timeout = local->dynamic_ps_forced_timeout; 3466 if (timeout < 0) 3467 timeout = 100; 3468 local->hw.conf.dynamic_ps_timeout = timeout; 3469 3470 /* If the TIM IE is invalid, pretend the value is 1 */ 3471 if (!dtimper) 3472 dtimper = 1; 3473 3474 local->hw.conf.ps_dtim_period = dtimper; 3475 local->ps_sdata = found; 3476 } else { 3477 local->ps_sdata = NULL; 3478 } 3479 3480 ieee80211_change_ps(local); 3481 } 3482 3483 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3484 { 3485 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3486 3487 if (sdata->vif.cfg.ps != ps_allowed) { 3488 sdata->vif.cfg.ps = ps_allowed; 3489 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3490 } 3491 } 3492 3493 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3494 struct wiphy_work *work) 3495 { 3496 struct ieee80211_local *local = 3497 container_of(work, struct ieee80211_local, 3498 dynamic_ps_disable_work); 3499 3500 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3501 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3502 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3503 } 3504 3505 ieee80211_wake_queues_by_reason(&local->hw, 3506 IEEE80211_MAX_QUEUE_MAP, 3507 IEEE80211_QUEUE_STOP_REASON_PS, 3508 false); 3509 } 3510 3511 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3512 struct wiphy_work *work) 3513 { 3514 struct ieee80211_local *local = 3515 container_of(work, struct ieee80211_local, 3516 dynamic_ps_enable_work); 3517 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3518 struct ieee80211_if_managed *ifmgd; 3519 unsigned long flags; 3520 int q; 3521 3522 /* can only happen when PS was just disabled anyway */ 3523 if (!sdata) 3524 return; 3525 3526 ifmgd = &sdata->u.mgd; 3527 3528 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3529 return; 3530 3531 if (local->hw.conf.dynamic_ps_timeout > 0) { 3532 /* don't enter PS if TX frames are pending */ 3533 if (drv_tx_frames_pending(local)) { 3534 mod_timer(&local->dynamic_ps_timer, jiffies + 3535 msecs_to_jiffies( 3536 local->hw.conf.dynamic_ps_timeout)); 3537 return; 3538 } 3539 3540 /* 3541 * transmission can be stopped by others which leads to 3542 * dynamic_ps_timer expiry. Postpone the ps timer if it 3543 * is not the actual idle state. 3544 */ 3545 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3546 for (q = 0; q < local->hw.queues; q++) { 3547 if (local->queue_stop_reasons[q]) { 3548 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3549 flags); 3550 mod_timer(&local->dynamic_ps_timer, jiffies + 3551 msecs_to_jiffies( 3552 local->hw.conf.dynamic_ps_timeout)); 3553 return; 3554 } 3555 } 3556 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3557 } 3558 3559 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3560 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3561 if (drv_tx_frames_pending(local)) { 3562 mod_timer(&local->dynamic_ps_timer, jiffies + 3563 msecs_to_jiffies( 3564 local->hw.conf.dynamic_ps_timeout)); 3565 } else { 3566 ieee80211_send_nullfunc(local, sdata, true); 3567 /* Flush to get the tx status of nullfunc frame */ 3568 ieee80211_flush_queues(local, sdata, false); 3569 } 3570 } 3571 3572 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3573 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3574 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3575 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3576 local->hw.conf.flags |= IEEE80211_CONF_PS; 3577 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3578 } 3579 } 3580 3581 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3582 { 3583 struct ieee80211_local *local = timer_container_of(local, t, 3584 dynamic_ps_timer); 3585 3586 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3587 } 3588 3589 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3590 { 3591 struct ieee80211_link_data *link = 3592 container_of(work, struct ieee80211_link_data, 3593 dfs_cac_timer_work.work); 3594 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3595 struct ieee80211_sub_if_data *sdata = link->sdata; 3596 3597 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3598 3599 if (sdata->wdev.links[link->link_id].cac_started) { 3600 ieee80211_link_release_channel(link); 3601 cfg80211_cac_event(sdata->dev, &chandef, 3602 NL80211_RADAR_CAC_FINISHED, 3603 GFP_KERNEL, link->link_id); 3604 } 3605 } 3606 3607 static bool 3608 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3609 { 3610 struct ieee80211_local *local = sdata->local; 3611 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3612 bool ret = false; 3613 int ac; 3614 3615 if (local->hw.queues < IEEE80211_NUM_ACS) 3616 return false; 3617 3618 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3619 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3620 int non_acm_ac; 3621 unsigned long now = jiffies; 3622 3623 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3624 tx_tspec->admitted_time && 3625 time_after(now, tx_tspec->time_slice_start + HZ)) { 3626 tx_tspec->consumed_tx_time = 0; 3627 tx_tspec->time_slice_start = now; 3628 3629 if (tx_tspec->downgraded) 3630 tx_tspec->action = 3631 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3632 } 3633 3634 switch (tx_tspec->action) { 3635 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3636 /* take the original parameters */ 3637 if (drv_conf_tx(local, &sdata->deflink, ac, 3638 &sdata->deflink.tx_conf[ac])) 3639 link_err(&sdata->deflink, 3640 "failed to set TX queue parameters for queue %d\n", 3641 ac); 3642 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3643 tx_tspec->downgraded = false; 3644 ret = true; 3645 break; 3646 case TX_TSPEC_ACTION_DOWNGRADE: 3647 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3648 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3649 ret = true; 3650 break; 3651 } 3652 /* downgrade next lower non-ACM AC */ 3653 for (non_acm_ac = ac + 1; 3654 non_acm_ac < IEEE80211_NUM_ACS; 3655 non_acm_ac++) 3656 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3657 break; 3658 /* Usually the loop will result in using BK even if it 3659 * requires admission control, but such a configuration 3660 * makes no sense and we have to transmit somehow - the 3661 * AC selection does the same thing. 3662 * If we started out trying to downgrade from BK, then 3663 * the extra condition here might be needed. 3664 */ 3665 if (non_acm_ac >= IEEE80211_NUM_ACS) 3666 non_acm_ac = IEEE80211_AC_BK; 3667 if (drv_conf_tx(local, &sdata->deflink, ac, 3668 &sdata->deflink.tx_conf[non_acm_ac])) 3669 link_err(&sdata->deflink, 3670 "failed to set TX queue parameters for queue %d\n", 3671 ac); 3672 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3673 ret = true; 3674 wiphy_delayed_work_queue(local->hw.wiphy, 3675 &ifmgd->tx_tspec_wk, 3676 tx_tspec->time_slice_start + 3677 HZ - now + 1); 3678 break; 3679 case TX_TSPEC_ACTION_NONE: 3680 /* nothing now */ 3681 break; 3682 } 3683 } 3684 3685 return ret; 3686 } 3687 3688 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3689 { 3690 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3691 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3692 BSS_CHANGED_QOS); 3693 } 3694 3695 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3696 struct wiphy_work *work) 3697 { 3698 struct ieee80211_sub_if_data *sdata; 3699 3700 sdata = container_of(work, struct ieee80211_sub_if_data, 3701 u.mgd.tx_tspec_wk.work); 3702 ieee80211_sta_handle_tspec_ac_params(sdata); 3703 } 3704 3705 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3706 { 3707 struct ieee80211_sub_if_data *sdata = link->sdata; 3708 struct ieee80211_local *local = sdata->local; 3709 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3710 struct ieee80211_tx_queue_params *params = link->tx_conf; 3711 u8 ac; 3712 3713 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3714 mlme_dbg(sdata, 3715 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3716 ac, params[ac].acm, 3717 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3718 params[ac].txop, params[ac].uapsd, 3719 ifmgd->tx_tspec[ac].downgraded); 3720 if (!ifmgd->tx_tspec[ac].downgraded && 3721 drv_conf_tx(local, link, ac, ¶ms[ac])) 3722 link_err(link, 3723 "failed to set TX queue parameters for AC %d\n", 3724 ac); 3725 } 3726 } 3727 3728 /* MLME */ 3729 static bool 3730 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3731 struct ieee80211_link_data *link, 3732 const u8 *wmm_param, size_t wmm_param_len, 3733 const struct ieee80211_mu_edca_param_set *mu_edca) 3734 { 3735 struct ieee80211_sub_if_data *sdata = link->sdata; 3736 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3737 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3738 size_t left; 3739 int count, mu_edca_count, ac; 3740 const u8 *pos; 3741 u8 uapsd_queues = 0; 3742 3743 if (!local->ops->conf_tx) 3744 return false; 3745 3746 if (local->hw.queues < IEEE80211_NUM_ACS) 3747 return false; 3748 3749 if (!wmm_param) 3750 return false; 3751 3752 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3753 return false; 3754 3755 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3756 uapsd_queues = ifmgd->uapsd_queues; 3757 3758 count = wmm_param[6] & 0x0f; 3759 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3760 * if mu_edca was preset before and now it disappeared tell 3761 * the driver about it. 3762 */ 3763 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3764 if (count == link->u.mgd.wmm_last_param_set && 3765 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3766 return false; 3767 link->u.mgd.wmm_last_param_set = count; 3768 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3769 3770 pos = wmm_param + 8; 3771 left = wmm_param_len - 8; 3772 3773 memset(¶ms, 0, sizeof(params)); 3774 3775 sdata->wmm_acm = 0; 3776 for (; left >= 4; left -= 4, pos += 4) { 3777 int aci = (pos[0] >> 5) & 0x03; 3778 int acm = (pos[0] >> 4) & 0x01; 3779 bool uapsd = false; 3780 3781 switch (aci) { 3782 case 1: /* AC_BK */ 3783 ac = IEEE80211_AC_BK; 3784 if (acm) 3785 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3786 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3787 uapsd = true; 3788 params[ac].mu_edca = !!mu_edca; 3789 if (mu_edca) 3790 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3791 break; 3792 case 2: /* AC_VI */ 3793 ac = IEEE80211_AC_VI; 3794 if (acm) 3795 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3796 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3797 uapsd = true; 3798 params[ac].mu_edca = !!mu_edca; 3799 if (mu_edca) 3800 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3801 break; 3802 case 3: /* AC_VO */ 3803 ac = IEEE80211_AC_VO; 3804 if (acm) 3805 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3806 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3807 uapsd = true; 3808 params[ac].mu_edca = !!mu_edca; 3809 if (mu_edca) 3810 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3811 break; 3812 case 0: /* AC_BE */ 3813 default: 3814 ac = IEEE80211_AC_BE; 3815 if (acm) 3816 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3817 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3818 uapsd = true; 3819 params[ac].mu_edca = !!mu_edca; 3820 if (mu_edca) 3821 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3822 break; 3823 } 3824 3825 params[ac].aifs = pos[0] & 0x0f; 3826 3827 if (params[ac].aifs < 2) { 3828 link_info(link, 3829 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3830 params[ac].aifs, aci); 3831 params[ac].aifs = 2; 3832 } 3833 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3834 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3835 params[ac].txop = get_unaligned_le16(pos + 2); 3836 params[ac].acm = acm; 3837 params[ac].uapsd = uapsd; 3838 3839 if (params[ac].cw_min == 0 || 3840 params[ac].cw_min > params[ac].cw_max) { 3841 link_info(link, 3842 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3843 params[ac].cw_min, params[ac].cw_max, aci); 3844 return false; 3845 } 3846 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3847 } 3848 3849 /* WMM specification requires all 4 ACIs. */ 3850 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3851 if (params[ac].cw_min == 0) { 3852 link_info(link, 3853 "AP has invalid WMM params (missing AC %d), using defaults\n", 3854 ac); 3855 return false; 3856 } 3857 } 3858 3859 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3860 link->tx_conf[ac] = params[ac]; 3861 3862 return true; 3863 } 3864 3865 static bool 3866 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3867 struct ieee80211_link_data *link, 3868 const u8 *wmm_param, size_t wmm_param_len, 3869 const struct ieee80211_mu_edca_param_set *mu_edca) 3870 { 3871 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3872 mu_edca)) 3873 return false; 3874 3875 ieee80211_mgd_set_link_qos_params(link); 3876 3877 /* enable WMM or activate new settings */ 3878 link->conf->qos = true; 3879 return true; 3880 } 3881 3882 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3883 { 3884 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3885 3886 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3887 ieee80211_run_deferred_scan(sdata->local); 3888 } 3889 3890 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3891 { 3892 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3893 3894 __ieee80211_stop_poll(sdata); 3895 } 3896 3897 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3898 u16 capab, bool erp_valid, u8 erp) 3899 { 3900 struct ieee80211_bss_conf *bss_conf = link->conf; 3901 struct ieee80211_supported_band *sband; 3902 u64 changed = 0; 3903 bool use_protection; 3904 bool use_short_preamble; 3905 bool use_short_slot; 3906 3907 sband = ieee80211_get_link_sband(link); 3908 if (!sband) 3909 return changed; 3910 3911 if (erp_valid) { 3912 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3913 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3914 } else { 3915 use_protection = false; 3916 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3917 } 3918 3919 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3920 if (sband->band == NL80211_BAND_5GHZ || 3921 sband->band == NL80211_BAND_6GHZ) 3922 use_short_slot = true; 3923 3924 if (use_protection != bss_conf->use_cts_prot) { 3925 bss_conf->use_cts_prot = use_protection; 3926 changed |= BSS_CHANGED_ERP_CTS_PROT; 3927 } 3928 3929 if (use_short_preamble != bss_conf->use_short_preamble) { 3930 bss_conf->use_short_preamble = use_short_preamble; 3931 changed |= BSS_CHANGED_ERP_PREAMBLE; 3932 } 3933 3934 if (use_short_slot != bss_conf->use_short_slot) { 3935 bss_conf->use_short_slot = use_short_slot; 3936 changed |= BSS_CHANGED_ERP_SLOT; 3937 } 3938 3939 return changed; 3940 } 3941 3942 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3943 struct cfg80211_bss *cbss) 3944 { 3945 struct ieee80211_sub_if_data *sdata = link->sdata; 3946 struct ieee80211_bss_conf *bss_conf = link->conf; 3947 struct ieee80211_bss *bss = (void *)cbss->priv; 3948 u64 changed = BSS_CHANGED_QOS; 3949 3950 /* not really used in MLO */ 3951 sdata->u.mgd.beacon_timeout = 3952 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3953 bss_conf->beacon_int)); 3954 3955 changed |= ieee80211_handle_bss_capability(link, 3956 bss_conf->assoc_capability, 3957 bss->has_erp_value, 3958 bss->erp_value); 3959 3960 ieee80211_check_rate_mask(link); 3961 3962 link->conf->bss = cbss; 3963 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3964 3965 if (sdata->vif.p2p || 3966 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3967 const struct cfg80211_bss_ies *ies; 3968 3969 rcu_read_lock(); 3970 ies = rcu_dereference(cbss->ies); 3971 if (ies) { 3972 int ret; 3973 3974 ret = cfg80211_get_p2p_attr( 3975 ies->data, ies->len, 3976 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3977 (u8 *) &bss_conf->p2p_noa_attr, 3978 sizeof(bss_conf->p2p_noa_attr)); 3979 if (ret >= 2) { 3980 link->u.mgd.p2p_noa_index = 3981 bss_conf->p2p_noa_attr.index; 3982 changed |= BSS_CHANGED_P2P_PS; 3983 } 3984 } 3985 rcu_read_unlock(); 3986 } 3987 3988 if (link->u.mgd.have_beacon) { 3989 bss_conf->beacon_rate = bss->beacon_rate; 3990 changed |= BSS_CHANGED_BEACON_INFO; 3991 } else { 3992 bss_conf->beacon_rate = NULL; 3993 } 3994 3995 /* Tell the driver to monitor connection quality (if supported) */ 3996 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3997 bss_conf->cqm_rssi_thold) 3998 changed |= BSS_CHANGED_CQM; 3999 4000 return changed; 4001 } 4002 4003 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 4004 struct ieee80211_mgd_assoc_data *assoc_data, 4005 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 4006 { 4007 struct ieee80211_local *local = sdata->local; 4008 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 4009 u64 vif_changed = BSS_CHANGED_ASSOC; 4010 unsigned int link_id; 4011 4012 lockdep_assert_wiphy(local->hw.wiphy); 4013 4014 sdata->u.mgd.associated = true; 4015 4016 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 4017 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4018 struct ieee80211_link_data *link; 4019 4020 if (!cbss || 4021 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4022 continue; 4023 4024 if (ieee80211_vif_is_mld(&sdata->vif) && 4025 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 4026 continue; 4027 4028 link = sdata_dereference(sdata->link[link_id], sdata); 4029 if (WARN_ON(!link)) 4030 return; 4031 4032 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 4033 } 4034 4035 /* just to be sure */ 4036 ieee80211_stop_poll(sdata); 4037 4038 ieee80211_led_assoc(local, 1); 4039 4040 vif_cfg->assoc = 1; 4041 4042 /* Enable ARP filtering */ 4043 if (vif_cfg->arp_addr_cnt) 4044 vif_changed |= BSS_CHANGED_ARP_FILTER; 4045 4046 if (ieee80211_vif_is_mld(&sdata->vif)) { 4047 for (link_id = 0; 4048 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4049 link_id++) { 4050 struct ieee80211_link_data *link; 4051 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 4052 4053 if (!cbss || 4054 !(BIT(link_id) & 4055 ieee80211_vif_usable_links(&sdata->vif)) || 4056 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 4057 continue; 4058 4059 link = sdata_dereference(sdata->link[link_id], sdata); 4060 if (WARN_ON(!link)) 4061 return; 4062 4063 ieee80211_link_info_change_notify(sdata, link, 4064 changed[link_id]); 4065 4066 ieee80211_recalc_smps(sdata, link); 4067 } 4068 4069 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 4070 } else { 4071 ieee80211_bss_info_change_notify(sdata, 4072 vif_changed | changed[0]); 4073 } 4074 4075 ieee80211_recalc_ps(local); 4076 4077 /* leave this here to not change ordering in non-MLO cases */ 4078 if (!ieee80211_vif_is_mld(&sdata->vif)) 4079 ieee80211_recalc_smps(sdata, &sdata->deflink); 4080 ieee80211_recalc_ps_vif(sdata); 4081 4082 netif_carrier_on(sdata->dev); 4083 } 4084 4085 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 4086 { 4087 struct ieee80211_mgd_assoc_data *add_links_data = 4088 sdata->u.mgd.reconf.add_links_data; 4089 4090 if (!ieee80211_vif_is_mld(&sdata->vif) || 4091 !(sdata->u.mgd.reconf.added_links | 4092 sdata->u.mgd.reconf.removed_links)) 4093 return; 4094 4095 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4096 &sdata->u.mgd.reconf.wk); 4097 sdata->u.mgd.reconf.added_links = 0; 4098 sdata->u.mgd.reconf.removed_links = 0; 4099 sdata->u.mgd.reconf.dialog_token = 0; 4100 4101 if (add_links_data) { 4102 struct cfg80211_mlo_reconf_done_data done_data = {}; 4103 u8 link_id; 4104 4105 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4106 link_id++) 4107 done_data.links[link_id].bss = 4108 add_links_data->link[link_id].bss; 4109 4110 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4111 4112 kfree(sdata->u.mgd.reconf.add_links_data); 4113 sdata->u.mgd.reconf.add_links_data = NULL; 4114 } 4115 } 4116 4117 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4118 u16 stype, u16 reason, bool tx, 4119 u8 *frame_buf) 4120 { 4121 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4122 struct ieee80211_local *local = sdata->local; 4123 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4124 unsigned int link_id; 4125 u64 changed = 0; 4126 struct ieee80211_prep_tx_info info = { 4127 .subtype = stype, 4128 .was_assoc = true, 4129 .link_id = ffs(sdata->vif.active_links) - 1, 4130 }; 4131 4132 lockdep_assert_wiphy(local->hw.wiphy); 4133 4134 if (frame_buf) 4135 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4136 4137 if (WARN_ON(!ap_sta)) 4138 return; 4139 4140 if (WARN_ON_ONCE(tx && !frame_buf)) 4141 return; 4142 4143 if (WARN_ON(!ifmgd->associated)) 4144 return; 4145 4146 ieee80211_stop_poll(sdata); 4147 4148 ifmgd->associated = false; 4149 4150 if (tx) { 4151 bool tx_link_found = false; 4152 4153 for (link_id = 0; 4154 link_id < ARRAY_SIZE(sdata->link); 4155 link_id++) { 4156 struct ieee80211_link_data *link; 4157 4158 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4159 continue; 4160 4161 link = sdata_dereference(sdata->link[link_id], sdata); 4162 if (WARN_ON_ONCE(!link)) 4163 continue; 4164 4165 if (link->u.mgd.csa.blocked_tx) 4166 continue; 4167 4168 tx_link_found = true; 4169 break; 4170 } 4171 4172 tx = tx_link_found; 4173 } 4174 4175 /* other links will be destroyed */ 4176 sdata->deflink.conf->bss = NULL; 4177 sdata->deflink.conf->epcs_support = false; 4178 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4179 4180 netif_carrier_off(sdata->dev); 4181 4182 /* 4183 * if we want to get out of ps before disassoc (why?) we have 4184 * to do it before sending disassoc, as otherwise the null-packet 4185 * won't be valid. 4186 */ 4187 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4188 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4189 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4190 } 4191 local->ps_sdata = NULL; 4192 4193 /* disable per-vif ps */ 4194 ieee80211_recalc_ps_vif(sdata); 4195 4196 /* make sure ongoing transmission finishes */ 4197 synchronize_net(); 4198 4199 /* 4200 * drop any frame before deauth/disassoc, this can be data or 4201 * management frame. Since we are disconnecting, we should not 4202 * insist sending these frames which can take time and delay 4203 * the disconnection and possible the roaming. 4204 */ 4205 ieee80211_flush_queues(local, sdata, true); 4206 4207 if (tx) { 4208 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4209 4210 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4211 sdata->vif.cfg.ap_addr, stype, 4212 reason, true, frame_buf); 4213 4214 /* flush out frame - make sure the deauth was actually sent */ 4215 ieee80211_flush_queues(local, sdata, false); 4216 4217 drv_mgd_complete_tx(sdata->local, sdata, &info); 4218 } else if (frame_buf) { 4219 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4220 sdata->vif.cfg.ap_addr, stype, 4221 reason, false, frame_buf); 4222 } 4223 4224 /* clear AP addr only after building the needed mgmt frames */ 4225 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4226 eth_zero_addr(sdata->vif.cfg.ap_addr); 4227 4228 sdata->vif.cfg.ssid_len = 0; 4229 4230 /* Remove TDLS peers */ 4231 __sta_info_flush(sdata, false, -1, ap_sta); 4232 4233 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4234 /* Only move the AP state */ 4235 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4236 } else { 4237 /* Remove AP peer */ 4238 sta_info_flush(sdata, -1); 4239 } 4240 4241 /* finally reset all BSS / config parameters */ 4242 if (!ieee80211_vif_is_mld(&sdata->vif)) 4243 changed |= ieee80211_reset_erp_info(sdata); 4244 4245 ieee80211_led_assoc(local, 0); 4246 changed |= BSS_CHANGED_ASSOC; 4247 sdata->vif.cfg.assoc = false; 4248 4249 sdata->deflink.u.mgd.p2p_noa_index = -1; 4250 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4251 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4252 4253 /* on the next assoc, re-program HT/VHT parameters */ 4254 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4255 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4256 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4257 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4258 4259 /* 4260 * reset MU-MIMO ownership and group data in default link, 4261 * if used, other links are destroyed 4262 */ 4263 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4264 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4265 memset(sdata->vif.bss_conf.mu_group.position, 0, 4266 sizeof(sdata->vif.bss_conf.mu_group.position)); 4267 if (!ieee80211_vif_is_mld(&sdata->vif)) 4268 changed |= BSS_CHANGED_MU_GROUPS; 4269 sdata->vif.bss_conf.mu_mimo_owner = false; 4270 4271 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4272 4273 timer_delete_sync(&local->dynamic_ps_timer); 4274 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4275 4276 /* Disable ARP filtering */ 4277 if (sdata->vif.cfg.arp_addr_cnt) 4278 changed |= BSS_CHANGED_ARP_FILTER; 4279 4280 sdata->vif.bss_conf.qos = false; 4281 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4282 changed |= BSS_CHANGED_QOS; 4283 /* The BSSID (not really interesting) and HT changed */ 4284 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4285 ieee80211_bss_info_change_notify(sdata, changed); 4286 } else { 4287 ieee80211_vif_cfg_change_notify(sdata, changed); 4288 } 4289 4290 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4291 /* 4292 * After notifying the driver about the disassoc, 4293 * remove the ap sta. 4294 */ 4295 sta_info_flush(sdata, -1); 4296 } 4297 4298 /* disassociated - set to defaults now */ 4299 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4300 4301 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4302 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4303 timer_delete_sync(&sdata->u.mgd.timer); 4304 4305 sdata->vif.bss_conf.dtim_period = 0; 4306 sdata->vif.bss_conf.beacon_rate = NULL; 4307 4308 sdata->deflink.u.mgd.have_beacon = false; 4309 sdata->deflink.u.mgd.tracking_signal_avg = false; 4310 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4311 4312 ifmgd->flags = 0; 4313 4314 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4315 struct ieee80211_link_data *link; 4316 4317 link = sdata_dereference(sdata->link[link_id], sdata); 4318 if (!link) 4319 continue; 4320 ieee80211_link_release_channel(link); 4321 } 4322 4323 sdata->vif.bss_conf.csa_active = false; 4324 sdata->deflink.u.mgd.csa.blocked_tx = false; 4325 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4326 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4327 ieee80211_vif_unblock_queues_csa(sdata); 4328 4329 /* existing TX TSPEC sessions no longer exist */ 4330 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4331 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4332 4333 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4334 sdata->vif.bss_conf.pwr_reduction = 0; 4335 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4336 4337 sdata->vif.cfg.eml_cap = 0; 4338 sdata->vif.cfg.eml_med_sync_delay = 0; 4339 sdata->vif.cfg.mld_capa_op = 0; 4340 4341 memset(&sdata->u.mgd.ttlm_info, 0, 4342 sizeof(sdata->u.mgd.ttlm_info)); 4343 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4344 4345 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4346 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4347 &ifmgd->neg_ttlm_timeout_work); 4348 4349 sdata->u.mgd.removed_links = 0; 4350 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 4351 &sdata->u.mgd.ml_reconf_work); 4352 4353 wiphy_work_cancel(sdata->local->hw.wiphy, 4354 &ifmgd->teardown_ttlm_work); 4355 4356 /* if disconnection happens in the middle of the ML reconfiguration 4357 * flow, cfg80211 must called to release the BSS references obtained 4358 * when the flow started. 4359 */ 4360 ieee80211_ml_reconf_reset(sdata); 4361 4362 ieee80211_vif_set_links(sdata, 0, 0); 4363 4364 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4365 4366 ifmgd->epcs.enabled = false; 4367 ifmgd->epcs.dialog_token = 0; 4368 4369 memset(ifmgd->userspace_selectors, 0, 4370 sizeof(ifmgd->userspace_selectors)); 4371 } 4372 4373 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4374 { 4375 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4376 struct ieee80211_local *local = sdata->local; 4377 4378 lockdep_assert_wiphy(local->hw.wiphy); 4379 4380 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4381 return; 4382 4383 __ieee80211_stop_poll(sdata); 4384 4385 ieee80211_recalc_ps(local); 4386 4387 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4388 return; 4389 4390 /* 4391 * We've received a probe response, but are not sure whether 4392 * we have or will be receiving any beacons or data, so let's 4393 * schedule the timers again, just in case. 4394 */ 4395 ieee80211_sta_reset_beacon_monitor(sdata); 4396 4397 mod_timer(&ifmgd->conn_mon_timer, 4398 round_jiffies_up(jiffies + 4399 IEEE80211_CONNECTION_IDLE_TIME)); 4400 } 4401 4402 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4403 struct ieee80211_hdr *hdr, 4404 u16 tx_time) 4405 { 4406 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4407 u16 tid; 4408 int ac; 4409 struct ieee80211_sta_tx_tspec *tx_tspec; 4410 unsigned long now = jiffies; 4411 4412 if (!ieee80211_is_data_qos(hdr->frame_control)) 4413 return; 4414 4415 tid = ieee80211_get_tid(hdr); 4416 ac = ieee80211_ac_from_tid(tid); 4417 tx_tspec = &ifmgd->tx_tspec[ac]; 4418 4419 if (likely(!tx_tspec->admitted_time)) 4420 return; 4421 4422 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4423 tx_tspec->consumed_tx_time = 0; 4424 tx_tspec->time_slice_start = now; 4425 4426 if (tx_tspec->downgraded) { 4427 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4428 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4429 &ifmgd->tx_tspec_wk, 0); 4430 } 4431 } 4432 4433 if (tx_tspec->downgraded) 4434 return; 4435 4436 tx_tspec->consumed_tx_time += tx_time; 4437 4438 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4439 tx_tspec->downgraded = true; 4440 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4441 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4442 &ifmgd->tx_tspec_wk, 0); 4443 } 4444 } 4445 4446 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4447 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4448 { 4449 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4450 4451 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4452 !sdata->u.mgd.probe_send_count) 4453 return; 4454 4455 if (ack) 4456 sdata->u.mgd.probe_send_count = 0; 4457 else 4458 sdata->u.mgd.nullfunc_failed = true; 4459 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4460 } 4461 4462 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4463 const u8 *src, const u8 *dst, 4464 const u8 *ssid, size_t ssid_len, 4465 struct ieee80211_channel *channel) 4466 { 4467 struct sk_buff *skb; 4468 4469 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4470 ssid, ssid_len, NULL, 0, 4471 IEEE80211_PROBE_FLAG_DIRECTED); 4472 if (skb) 4473 ieee80211_tx_skb(sdata, skb); 4474 } 4475 4476 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4477 { 4478 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4479 u8 *dst = sdata->vif.cfg.ap_addr; 4480 u8 unicast_limit = max(1, max_probe_tries - 3); 4481 struct sta_info *sta; 4482 4483 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4484 4485 /* 4486 * Try sending broadcast probe requests for the last three 4487 * probe requests after the first ones failed since some 4488 * buggy APs only support broadcast probe requests. 4489 */ 4490 if (ifmgd->probe_send_count >= unicast_limit) 4491 dst = NULL; 4492 4493 /* 4494 * When the hardware reports an accurate Tx ACK status, it's 4495 * better to send a nullfunc frame instead of a probe request, 4496 * as it will kick us off the AP quickly if we aren't associated 4497 * anymore. The timeout will be reset if the frame is ACKed by 4498 * the AP. 4499 */ 4500 ifmgd->probe_send_count++; 4501 4502 if (dst) { 4503 sta = sta_info_get(sdata, dst); 4504 if (!WARN_ON(!sta)) 4505 ieee80211_check_fast_rx(sta); 4506 } 4507 4508 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4509 ifmgd->nullfunc_failed = false; 4510 ieee80211_send_nullfunc(sdata->local, sdata, false); 4511 } else { 4512 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4513 sdata->vif.cfg.ssid, 4514 sdata->vif.cfg.ssid_len, 4515 sdata->deflink.conf->bss->channel); 4516 } 4517 4518 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4519 run_again(sdata, ifmgd->probe_timeout); 4520 } 4521 4522 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4523 bool beacon) 4524 { 4525 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4526 bool already = false; 4527 4528 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4529 4530 if (!ieee80211_sdata_running(sdata)) 4531 return; 4532 4533 if (!ifmgd->associated) 4534 return; 4535 4536 if (sdata->local->tmp_channel || sdata->local->scanning) 4537 return; 4538 4539 if (sdata->local->suspending) { 4540 /* reschedule after resume */ 4541 ieee80211_reset_ap_probe(sdata); 4542 return; 4543 } 4544 4545 if (beacon) { 4546 mlme_dbg_ratelimited(sdata, 4547 "detected beacon loss from AP (missed %d beacons) - probing\n", 4548 beacon_loss_count); 4549 4550 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4551 } 4552 4553 /* 4554 * The driver/our work has already reported this event or the 4555 * connection monitoring has kicked in and we have already sent 4556 * a probe request. Or maybe the AP died and the driver keeps 4557 * reporting until we disassociate... 4558 * 4559 * In either case we have to ignore the current call to this 4560 * function (except for setting the correct probe reason bit) 4561 * because otherwise we would reset the timer every time and 4562 * never check whether we received a probe response! 4563 */ 4564 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4565 already = true; 4566 4567 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4568 4569 if (already) 4570 return; 4571 4572 ieee80211_recalc_ps(sdata->local); 4573 4574 ifmgd->probe_send_count = 0; 4575 ieee80211_mgd_probe_ap_send(sdata); 4576 } 4577 4578 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4579 struct ieee80211_vif *vif) 4580 { 4581 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4582 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4583 struct cfg80211_bss *cbss; 4584 struct sk_buff *skb; 4585 const struct element *ssid; 4586 int ssid_len; 4587 4588 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4589 4590 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4591 ieee80211_vif_is_mld(&sdata->vif))) 4592 return NULL; 4593 4594 if (ifmgd->associated) 4595 cbss = sdata->deflink.conf->bss; 4596 else if (ifmgd->auth_data) 4597 cbss = ifmgd->auth_data->bss; 4598 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4599 cbss = ifmgd->assoc_data->link[0].bss; 4600 else 4601 return NULL; 4602 4603 rcu_read_lock(); 4604 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4605 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4606 "invalid SSID element (len=%d)", 4607 ssid ? ssid->datalen : -1)) 4608 ssid_len = 0; 4609 else 4610 ssid_len = ssid->datalen; 4611 4612 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4613 (u32) -1, cbss->channel, 4614 ssid->data, ssid_len, 4615 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4616 rcu_read_unlock(); 4617 4618 return skb; 4619 } 4620 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4621 4622 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4623 const u8 *buf, size_t len, bool tx, 4624 u16 reason, bool reconnect) 4625 { 4626 struct ieee80211_event event = { 4627 .type = MLME_EVENT, 4628 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4629 .u.mlme.reason = reason, 4630 }; 4631 4632 if (tx) 4633 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4634 else 4635 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4636 4637 drv_event_callback(sdata->local, sdata, &event); 4638 } 4639 4640 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4641 { 4642 struct ieee80211_local *local = sdata->local; 4643 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4644 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4645 4646 lockdep_assert_wiphy(local->hw.wiphy); 4647 4648 if (!ifmgd->associated) 4649 return; 4650 4651 if (!ifmgd->driver_disconnect) { 4652 unsigned int link_id; 4653 4654 /* 4655 * AP is probably out of range (or not reachable for another 4656 * reason) so remove the bss structs for that AP. In the case 4657 * of multi-link, it's not clear that all of them really are 4658 * out of range, but if they weren't the driver likely would 4659 * have switched to just have a single link active? 4660 */ 4661 for (link_id = 0; 4662 link_id < ARRAY_SIZE(sdata->link); 4663 link_id++) { 4664 struct ieee80211_link_data *link; 4665 4666 link = sdata_dereference(sdata->link[link_id], sdata); 4667 if (!link || !link->conf->bss) 4668 continue; 4669 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4670 link->conf->bss = NULL; 4671 } 4672 } 4673 4674 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4675 ifmgd->driver_disconnect ? 4676 WLAN_REASON_DEAUTH_LEAVING : 4677 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4678 true, frame_buf); 4679 /* the other links will be destroyed */ 4680 sdata->vif.bss_conf.csa_active = false; 4681 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4682 sdata->deflink.u.mgd.csa.blocked_tx = false; 4683 ieee80211_vif_unblock_queues_csa(sdata); 4684 4685 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4686 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4687 ifmgd->reconnect); 4688 ifmgd->reconnect = false; 4689 } 4690 4691 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4692 struct wiphy_work *work) 4693 { 4694 struct ieee80211_sub_if_data *sdata = 4695 container_of(work, struct ieee80211_sub_if_data, 4696 u.mgd.beacon_connection_loss_work); 4697 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4698 4699 if (ifmgd->connection_loss) { 4700 sdata_info(sdata, "Connection to AP %pM lost\n", 4701 sdata->vif.cfg.ap_addr); 4702 __ieee80211_disconnect(sdata); 4703 ifmgd->connection_loss = false; 4704 } else if (ifmgd->driver_disconnect) { 4705 sdata_info(sdata, 4706 "Driver requested disconnection from AP %pM\n", 4707 sdata->vif.cfg.ap_addr); 4708 __ieee80211_disconnect(sdata); 4709 ifmgd->driver_disconnect = false; 4710 } else { 4711 if (ifmgd->associated) 4712 sdata->deflink.u.mgd.beacon_loss_count++; 4713 ieee80211_mgd_probe_ap(sdata, true); 4714 } 4715 } 4716 4717 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4718 struct wiphy_work *work) 4719 { 4720 struct ieee80211_sub_if_data *sdata = 4721 container_of(work, struct ieee80211_sub_if_data, 4722 u.mgd.csa_connection_drop_work); 4723 4724 __ieee80211_disconnect(sdata); 4725 } 4726 4727 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4728 { 4729 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4730 struct ieee80211_hw *hw = &sdata->local->hw; 4731 4732 trace_api_beacon_loss(sdata); 4733 4734 sdata->u.mgd.connection_loss = false; 4735 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4736 } 4737 EXPORT_SYMBOL(ieee80211_beacon_loss); 4738 4739 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4740 { 4741 struct ieee80211_sub_if_data *sdata; 4742 struct ieee80211_hw *hw; 4743 4744 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4745 4746 sdata = vif_to_sdata(vif); 4747 hw = &sdata->local->hw; 4748 4749 trace_api_connection_loss(sdata); 4750 4751 sdata->u.mgd.connection_loss = true; 4752 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4753 } 4754 EXPORT_SYMBOL(ieee80211_connection_loss); 4755 4756 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4757 { 4758 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4759 struct ieee80211_hw *hw = &sdata->local->hw; 4760 4761 trace_api_disconnect(sdata, reconnect); 4762 4763 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4764 return; 4765 4766 sdata->u.mgd.driver_disconnect = true; 4767 sdata->u.mgd.reconnect = reconnect; 4768 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4769 } 4770 EXPORT_SYMBOL(ieee80211_disconnect); 4771 4772 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4773 bool assoc) 4774 { 4775 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4776 4777 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4778 4779 sdata->u.mgd.auth_data = NULL; 4780 4781 if (!assoc) { 4782 /* 4783 * we are not authenticated yet, the only timer that could be 4784 * running is the timeout for the authentication response which 4785 * which is not relevant anymore. 4786 */ 4787 timer_delete_sync(&sdata->u.mgd.timer); 4788 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4789 4790 /* other links are destroyed */ 4791 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4792 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4793 BSS_CHANGED_BSSID); 4794 sdata->u.mgd.flags = 0; 4795 4796 ieee80211_link_release_channel(&sdata->deflink); 4797 ieee80211_vif_set_links(sdata, 0, 0); 4798 } 4799 4800 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4801 kfree(auth_data); 4802 } 4803 4804 enum assoc_status { 4805 ASSOC_SUCCESS, 4806 ASSOC_REJECTED, 4807 ASSOC_TIMEOUT, 4808 ASSOC_ABANDON, 4809 }; 4810 4811 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4812 enum assoc_status status) 4813 { 4814 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4815 4816 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4817 4818 sdata->u.mgd.assoc_data = NULL; 4819 4820 if (status != ASSOC_SUCCESS) { 4821 /* 4822 * we are not associated yet, the only timer that could be 4823 * running is the timeout for the association response which 4824 * which is not relevant anymore. 4825 */ 4826 timer_delete_sync(&sdata->u.mgd.timer); 4827 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4828 4829 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4830 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4831 BSS_CHANGED_BSSID); 4832 sdata->u.mgd.flags = 0; 4833 sdata->vif.bss_conf.mu_mimo_owner = false; 4834 4835 if (status != ASSOC_REJECTED) { 4836 struct cfg80211_assoc_failure data = { 4837 .timeout = status == ASSOC_TIMEOUT, 4838 }; 4839 int i; 4840 4841 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4842 ARRAY_SIZE(assoc_data->link)); 4843 4844 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4845 data.bss[i] = assoc_data->link[i].bss; 4846 4847 if (ieee80211_vif_is_mld(&sdata->vif)) 4848 data.ap_mld_addr = assoc_data->ap_addr; 4849 4850 cfg80211_assoc_failure(sdata->dev, &data); 4851 } 4852 4853 ieee80211_link_release_channel(&sdata->deflink); 4854 ieee80211_vif_set_links(sdata, 0, 0); 4855 } 4856 4857 kfree(assoc_data); 4858 } 4859 4860 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4861 struct ieee80211_mgmt *mgmt, size_t len) 4862 { 4863 struct ieee80211_local *local = sdata->local; 4864 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4865 const struct element *challenge; 4866 u8 *pos; 4867 u32 tx_flags = 0; 4868 struct ieee80211_prep_tx_info info = { 4869 .subtype = IEEE80211_STYPE_AUTH, 4870 .link_id = auth_data->link_id, 4871 }; 4872 4873 pos = mgmt->u.auth.variable; 4874 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4875 len - (pos - (u8 *)mgmt)); 4876 if (!challenge) 4877 return; 4878 auth_data->expected_transaction = 4; 4879 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4880 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4881 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4882 IEEE80211_TX_INTFL_MLME_CONN_TX; 4883 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4884 (void *)challenge, 4885 challenge->datalen + sizeof(*challenge), 4886 auth_data->ap_addr, auth_data->ap_addr, 4887 auth_data->key, auth_data->key_len, 4888 auth_data->key_idx, tx_flags); 4889 } 4890 4891 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4892 { 4893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4894 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4895 struct sta_info *sta; 4896 4897 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4898 4899 sdata_info(sdata, "authenticated\n"); 4900 ifmgd->auth_data->done = true; 4901 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4902 ifmgd->auth_data->timeout_started = true; 4903 run_again(sdata, ifmgd->auth_data->timeout); 4904 4905 /* move station state to auth */ 4906 sta = sta_info_get(sdata, ap_addr); 4907 if (!sta) { 4908 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4909 return false; 4910 } 4911 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4912 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4913 return false; 4914 } 4915 4916 return true; 4917 } 4918 4919 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4920 struct ieee80211_mgmt *mgmt, size_t len) 4921 { 4922 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4923 u16 auth_alg, auth_transaction, status_code, encap_len; 4924 struct ieee80211_event event = { 4925 .type = MLME_EVENT, 4926 .u.mlme.data = AUTH_EVENT, 4927 }; 4928 struct ieee80211_prep_tx_info info = { 4929 .subtype = IEEE80211_STYPE_AUTH, 4930 }; 4931 bool sae_need_confirm = false; 4932 bool auth_fail = false; 4933 4934 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4935 4936 if (len < 24 + 6) 4937 return; 4938 4939 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4940 return; 4941 4942 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4943 return; 4944 4945 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4946 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4947 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4948 4949 /* 4950 * IEEE 802.1X Authentication: 4951 * Header + Authentication Algorithm Number(2 byte) + Authentication 4952 * Transaction Sequence Number(2 byte) + Status Code(2 byte) + 4953 * Encapsulation Length(2 byte). 4954 */ 4955 if (auth_alg == WLAN_AUTH_IEEE8021X && len < 24 + 8) 4956 return; 4957 4958 info.link_id = ifmgd->auth_data->link_id; 4959 4960 if (auth_alg != ifmgd->auth_data->algorithm || 4961 (auth_alg != WLAN_AUTH_SAE && 4962 auth_transaction != ifmgd->auth_data->expected_transaction) || 4963 (auth_alg == WLAN_AUTH_SAE && 4964 (auth_transaction < ifmgd->auth_data->expected_transaction || 4965 auth_transaction > 2))) { 4966 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4967 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4968 auth_transaction, 4969 ifmgd->auth_data->expected_transaction); 4970 goto notify_driver; 4971 } 4972 4973 switch (auth_alg) { 4974 case WLAN_AUTH_IEEE8021X: 4975 if (status_code != WLAN_STATUS_SUCCESS && 4976 status_code != WLAN_STATUS_8021X_AUTH_SUCCESS) 4977 auth_fail = true; 4978 4979 if (!auth_fail) { 4980 /* Indicates length of encapsulated EAPOL PDU */ 4981 encap_len = get_unaligned_le16(mgmt->u.auth.variable); 4982 } 4983 break; 4984 default: 4985 if (status_code != WLAN_STATUS_SUCCESS) 4986 auth_fail = true; 4987 break; 4988 } 4989 4990 if (auth_fail) { 4991 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4992 4993 if (auth_alg == WLAN_AUTH_SAE && 4994 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4995 (auth_transaction == 1 && 4996 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4997 status_code == WLAN_STATUS_SAE_PK)))) { 4998 /* waiting for userspace now */ 4999 ifmgd->auth_data->waiting = true; 5000 ifmgd->auth_data->timeout = 5001 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 5002 ifmgd->auth_data->timeout_started = true; 5003 run_again(sdata, ifmgd->auth_data->timeout); 5004 if (auth_transaction == 1) 5005 sae_need_confirm = true; 5006 goto notify_driver; 5007 } 5008 5009 sdata_info(sdata, "%pM denied authentication (status %d)\n", 5010 mgmt->sa, status_code); 5011 ieee80211_destroy_auth_data(sdata, false); 5012 event.u.mlme.status = MLME_DENIED; 5013 event.u.mlme.reason = status_code; 5014 drv_event_callback(sdata->local, sdata, &event); 5015 goto notify_driver; 5016 } 5017 5018 switch (ifmgd->auth_data->algorithm) { 5019 case WLAN_AUTH_OPEN: 5020 case WLAN_AUTH_LEAP: 5021 case WLAN_AUTH_FT: 5022 case WLAN_AUTH_SAE: 5023 case WLAN_AUTH_FILS_SK: 5024 case WLAN_AUTH_FILS_SK_PFS: 5025 case WLAN_AUTH_FILS_PK: 5026 case WLAN_AUTH_EPPKE: 5027 case WLAN_AUTH_IEEE8021X: 5028 break; 5029 case WLAN_AUTH_SHARED_KEY: 5030 if (ifmgd->auth_data->expected_transaction != 4) { 5031 ieee80211_auth_challenge(sdata, mgmt, len); 5032 /* need another frame */ 5033 return; 5034 } 5035 break; 5036 default: 5037 WARN_ONCE(1, "invalid auth alg %d", 5038 ifmgd->auth_data->algorithm); 5039 goto notify_driver; 5040 } 5041 5042 event.u.mlme.status = MLME_SUCCESS; 5043 info.success = 1; 5044 drv_event_callback(sdata->local, sdata, &event); 5045 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 5046 (auth_transaction == 2 && 5047 ifmgd->auth_data->expected_transaction == 2)) { 5048 switch (ifmgd->auth_data->algorithm) { 5049 case WLAN_AUTH_IEEE8021X: 5050 /* 5051 * IEEE 802.1X authentication: 5052 * - When the full EAP handshake completes over the 5053 * Authentication process, the responder sets the 5054 * Status Code to WLAN_STATUS_8021X_AUTH_SUCCESS as 5055 * specified in "IEEE P802.11bi/D4.0, 12.16.5". 5056 * 5057 * - In the PMKSA caching case, only two Authentication 5058 * frames are exchanged if the responder (e.g., AP) 5059 * identifies a valid PMKSA, then as specified in 5060 * "IEEE P802.11bi/D4.0, 12.16.8.3", the responder 5061 * shall set the Status Code to SUCCESS in the final 5062 * Authentication frame and must not include an 5063 * encapsulated EAPOL PDU. 5064 * 5065 * Both conditions are treated as successful 5066 * authentication, so mark the state to Authenticated. 5067 */ 5068 if (status_code != WLAN_STATUS_8021X_AUTH_SUCCESS && 5069 !(status_code == WLAN_STATUS_SUCCESS && 5070 encap_len == 0)) 5071 break; 5072 fallthrough; 5073 default: 5074 if (!ieee80211_mark_sta_auth(sdata)) 5075 return; /* ignore frame -- wait for timeout */ 5076 5077 break; 5078 } 5079 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5080 auth_transaction == 1) { 5081 sae_need_confirm = true; 5082 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 5083 auth_transaction == 2) { 5084 sdata_info(sdata, "SAE peer confirmed\n"); 5085 ifmgd->auth_data->peer_confirmed = true; 5086 } 5087 5088 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5089 notify_driver: 5090 if (!sae_need_confirm) 5091 drv_mgd_complete_tx(sdata->local, sdata, &info); 5092 } 5093 5094 #define case_WLAN(type) \ 5095 case WLAN_REASON_##type: return #type 5096 5097 const char *ieee80211_get_reason_code_string(u16 reason_code) 5098 { 5099 switch (reason_code) { 5100 case_WLAN(UNSPECIFIED); 5101 case_WLAN(PREV_AUTH_NOT_VALID); 5102 case_WLAN(DEAUTH_LEAVING); 5103 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 5104 case_WLAN(DISASSOC_AP_BUSY); 5105 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 5106 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 5107 case_WLAN(DISASSOC_STA_HAS_LEFT); 5108 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 5109 case_WLAN(DISASSOC_BAD_POWER); 5110 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 5111 case_WLAN(INVALID_IE); 5112 case_WLAN(MIC_FAILURE); 5113 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 5114 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 5115 case_WLAN(IE_DIFFERENT); 5116 case_WLAN(INVALID_GROUP_CIPHER); 5117 case_WLAN(INVALID_PAIRWISE_CIPHER); 5118 case_WLAN(INVALID_AKMP); 5119 case_WLAN(UNSUPP_RSN_VERSION); 5120 case_WLAN(INVALID_RSN_IE_CAP); 5121 case_WLAN(IEEE8021X_FAILED); 5122 case_WLAN(CIPHER_SUITE_REJECTED); 5123 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 5124 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 5125 case_WLAN(DISASSOC_LOW_ACK); 5126 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 5127 case_WLAN(QSTA_LEAVE_QBSS); 5128 case_WLAN(QSTA_NOT_USE); 5129 case_WLAN(QSTA_REQUIRE_SETUP); 5130 case_WLAN(QSTA_TIMEOUT); 5131 case_WLAN(QSTA_CIPHER_NOT_SUPP); 5132 case_WLAN(MESH_PEER_CANCELED); 5133 case_WLAN(MESH_MAX_PEERS); 5134 case_WLAN(MESH_CONFIG); 5135 case_WLAN(MESH_CLOSE); 5136 case_WLAN(MESH_MAX_RETRIES); 5137 case_WLAN(MESH_CONFIRM_TIMEOUT); 5138 case_WLAN(MESH_INVALID_GTK); 5139 case_WLAN(MESH_INCONSISTENT_PARAM); 5140 case_WLAN(MESH_INVALID_SECURITY); 5141 case_WLAN(MESH_PATH_ERROR); 5142 case_WLAN(MESH_PATH_NOFORWARD); 5143 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 5144 case_WLAN(MAC_EXISTS_IN_MBSS); 5145 case_WLAN(MESH_CHAN_REGULATORY); 5146 case_WLAN(MESH_CHAN); 5147 default: return "<unknown>"; 5148 } 5149 } 5150 5151 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5152 struct ieee80211_mgmt *mgmt, size_t len) 5153 { 5154 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5155 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5156 5157 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5158 5159 if (len < 24 + 2) 5160 return; 5161 5162 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5163 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5164 return; 5165 } 5166 5167 if (ifmgd->associated && 5168 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5169 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5170 sdata->vif.cfg.ap_addr, reason_code, 5171 ieee80211_get_reason_code_string(reason_code)); 5172 5173 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5174 5175 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5176 reason_code, false); 5177 return; 5178 } 5179 5180 if (ifmgd->assoc_data && 5181 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5182 sdata_info(sdata, 5183 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5184 ifmgd->assoc_data->ap_addr, reason_code, 5185 ieee80211_get_reason_code_string(reason_code)); 5186 5187 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5188 5189 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5190 return; 5191 } 5192 } 5193 5194 5195 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5196 struct ieee80211_mgmt *mgmt, size_t len) 5197 { 5198 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5199 u16 reason_code; 5200 5201 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5202 5203 if (len < 24 + 2) 5204 return; 5205 5206 if (!ifmgd->associated || 5207 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5208 return; 5209 5210 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5211 5212 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5213 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5214 return; 5215 } 5216 5217 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5218 sdata->vif.cfg.ap_addr, reason_code, 5219 ieee80211_get_reason_code_string(reason_code)); 5220 5221 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5222 5223 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5224 false); 5225 } 5226 5227 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5228 struct ieee80211_supported_band *sband, 5229 const struct link_sta_info *link_sta, 5230 const struct ieee802_11_elems *elems) 5231 { 5232 const struct ieee80211_sta_he_cap *own_he_cap = 5233 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5234 5235 if (elems->ext_capab_len < 10) 5236 return false; 5237 5238 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5239 return false; 5240 5241 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5242 IEEE80211_HE_MAC_CAP0_TWT_RES && 5243 own_he_cap && 5244 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5245 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5246 } 5247 5248 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5249 struct ieee80211_supported_band *sband, 5250 struct ieee80211_link_data *link, 5251 struct link_sta_info *link_sta, 5252 struct ieee802_11_elems *elems) 5253 { 5254 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5255 5256 if (link->conf->twt_requester != twt) { 5257 link->conf->twt_requester = twt; 5258 return BSS_CHANGED_TWT; 5259 } 5260 return 0; 5261 } 5262 5263 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5264 struct ieee80211_bss_conf *bss_conf, 5265 struct ieee80211_supported_band *sband, 5266 struct link_sta_info *link_sta) 5267 { 5268 const struct ieee80211_sta_he_cap *own_he_cap = 5269 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5270 5271 return bss_conf->he_support && 5272 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5273 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5274 own_he_cap && 5275 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5276 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5277 } 5278 5279 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5280 bool enabled) 5281 { 5282 /* in any case this is called, dialog token should be reset */ 5283 sdata->u.mgd.epcs.dialog_token = 0; 5284 5285 if (sdata->u.mgd.epcs.enabled == enabled) 5286 return; 5287 5288 sdata->u.mgd.epcs.enabled = enabled; 5289 cfg80211_epcs_changed(sdata->dev, enabled); 5290 } 5291 5292 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5293 { 5294 struct ieee80211_local *local = sdata->local; 5295 u8 link_id; 5296 5297 if (!sdata->u.mgd.epcs.enabled) 5298 return; 5299 5300 lockdep_assert_wiphy(local->hw.wiphy); 5301 5302 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5303 struct ieee802_11_elems *elems; 5304 struct ieee80211_link_data *link; 5305 const struct cfg80211_bss_ies *ies; 5306 bool ret; 5307 5308 rcu_read_lock(); 5309 5310 link = sdata_dereference(sdata->link[link_id], sdata); 5311 if (!link || !link->conf || !link->conf->bss) { 5312 rcu_read_unlock(); 5313 continue; 5314 } 5315 5316 if (link->u.mgd.disable_wmm_tracking) { 5317 rcu_read_unlock(); 5318 ieee80211_set_wmm_default(link, false, false); 5319 continue; 5320 } 5321 5322 ies = rcu_dereference(link->conf->bss->beacon_ies); 5323 if (!ies) { 5324 rcu_read_unlock(); 5325 ieee80211_set_wmm_default(link, false, false); 5326 continue; 5327 } 5328 5329 elems = ieee802_11_parse_elems(ies->data, ies->len, 5330 IEEE80211_FTYPE_MGMT | 5331 IEEE80211_STYPE_BEACON, 5332 NULL); 5333 if (!elems) { 5334 rcu_read_unlock(); 5335 ieee80211_set_wmm_default(link, false, false); 5336 continue; 5337 } 5338 5339 ret = _ieee80211_sta_wmm_params(local, link, 5340 elems->wmm_param, 5341 elems->wmm_param_len, 5342 elems->mu_edca_param_set); 5343 5344 kfree(elems); 5345 rcu_read_unlock(); 5346 5347 if (!ret) { 5348 ieee80211_set_wmm_default(link, false, false); 5349 continue; 5350 } 5351 5352 ieee80211_mgd_set_link_qos_params(link); 5353 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5354 } 5355 } 5356 5357 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5358 struct link_sta_info *link_sta, 5359 struct cfg80211_bss *cbss, 5360 struct ieee80211_mgmt *mgmt, 5361 const u8 *elem_start, 5362 unsigned int elem_len, 5363 u64 *changed) 5364 { 5365 struct ieee80211_sub_if_data *sdata = link->sdata; 5366 struct ieee80211_mgd_assoc_data *assoc_data = 5367 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5368 struct ieee80211_bss_conf *bss_conf = link->conf; 5369 struct ieee80211_local *local = sdata->local; 5370 unsigned int link_id = link->link_id; 5371 struct ieee80211_elems_parse_params parse_params = { 5372 .mode = link->u.mgd.conn.mode, 5373 .start = elem_start, 5374 .len = elem_len, 5375 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5376 .from_ap = true, 5377 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5378 }; 5379 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5380 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5381 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5382 const struct cfg80211_bss_ies *bss_ies = NULL; 5383 struct ieee80211_supported_band *sband; 5384 struct ieee802_11_elems *elems; 5385 const __le16 prof_bss_param_ch_present = 5386 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5387 u16 capab_info; 5388 bool ret; 5389 5390 elems = ieee802_11_parse_elems_full(&parse_params); 5391 if (!elems) 5392 return false; 5393 5394 if (link_id == assoc_data->assoc_link_id) { 5395 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5396 5397 /* 5398 * we should not get to this flow unless the association was 5399 * successful, so set the status directly to success 5400 */ 5401 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5402 if (elems->ml_basic) { 5403 int bss_param_ch_cnt = 5404 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5405 5406 if (bss_param_ch_cnt < 0) { 5407 ret = false; 5408 goto out; 5409 } 5410 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5411 bss_conf->bss_param_ch_cnt_link_id = link_id; 5412 } 5413 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5414 !elems->prof || 5415 !(elems->prof->control & prof_bss_param_ch_present)) { 5416 ret = false; 5417 goto out; 5418 } else { 5419 const u8 *ptr = elems->prof->variable + 5420 elems->prof->sta_info_len - 1; 5421 int bss_param_ch_cnt; 5422 5423 /* 5424 * During parsing, we validated that these fields exist, 5425 * otherwise elems->prof would have been set to NULL. 5426 */ 5427 capab_info = get_unaligned_le16(ptr); 5428 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5429 bss_param_ch_cnt = 5430 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5431 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5432 bss_conf->bss_param_ch_cnt_link_id = link_id; 5433 5434 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5435 link_info(link, "association response status code=%u\n", 5436 assoc_data->link[link_id].status); 5437 ret = true; 5438 goto out; 5439 } 5440 } 5441 5442 if (!is_s1g && !elems->supp_rates) { 5443 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5444 ret = false; 5445 goto out; 5446 } 5447 5448 link->u.mgd.tdls_chan_switch_prohibited = 5449 elems->ext_capab && elems->ext_capab_len >= 5 && 5450 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5451 5452 /* 5453 * Some APs are erroneously not including some information in their 5454 * (re)association response frames. Try to recover by using the data 5455 * from the beacon or probe response. This seems to afflict mobile 5456 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5457 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5458 */ 5459 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5460 ((assoc_data->wmm && !elems->wmm_param) || 5461 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5462 (!elems->ht_cap_elem || !elems->ht_operation)) || 5463 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5464 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5465 const struct cfg80211_bss_ies *ies; 5466 struct ieee802_11_elems *bss_elems; 5467 5468 rcu_read_lock(); 5469 ies = rcu_dereference(cbss->ies); 5470 if (ies) 5471 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5472 GFP_ATOMIC); 5473 rcu_read_unlock(); 5474 if (!bss_ies) { 5475 ret = false; 5476 goto out; 5477 } 5478 5479 parse_params.start = bss_ies->data; 5480 parse_params.len = bss_ies->len; 5481 parse_params.bss = cbss; 5482 parse_params.link_id = -1; 5483 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5484 if (!bss_elems) { 5485 ret = false; 5486 goto out; 5487 } 5488 5489 if (assoc_data->wmm && 5490 !elems->wmm_param && bss_elems->wmm_param) { 5491 elems->wmm_param = bss_elems->wmm_param; 5492 sdata_info(sdata, 5493 "AP bug: WMM param missing from AssocResp\n"); 5494 } 5495 5496 /* 5497 * Also check if we requested HT/VHT, otherwise the AP doesn't 5498 * have to include the IEs in the (re)association response. 5499 */ 5500 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5501 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5502 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5503 sdata_info(sdata, 5504 "AP bug: HT capability missing from AssocResp\n"); 5505 } 5506 if (!elems->ht_operation && bss_elems->ht_operation && 5507 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5508 elems->ht_operation = bss_elems->ht_operation; 5509 sdata_info(sdata, 5510 "AP bug: HT operation missing from AssocResp\n"); 5511 } 5512 5513 if (is_5ghz) { 5514 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5515 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5516 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5517 sdata_info(sdata, 5518 "AP bug: VHT capa missing from AssocResp\n"); 5519 } 5520 5521 if (!elems->vht_operation && bss_elems->vht_operation && 5522 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5523 elems->vht_operation = bss_elems->vht_operation; 5524 sdata_info(sdata, 5525 "AP bug: VHT operation missing from AssocResp\n"); 5526 } 5527 } 5528 kfree(bss_elems); 5529 } 5530 5531 /* 5532 * We previously checked these in the beacon/probe response, so 5533 * they should be present here. This is just a safety net. 5534 * Note that the ieee80211_config_bw() below would also check 5535 * for this (and more), but this has better error reporting. 5536 */ 5537 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5538 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5539 sdata_info(sdata, 5540 "HT AP is missing WMM params or HT capability/operation\n"); 5541 ret = false; 5542 goto out; 5543 } 5544 5545 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5546 (!elems->vht_cap_elem || !elems->vht_operation)) { 5547 sdata_info(sdata, 5548 "VHT AP is missing VHT capability/operation\n"); 5549 ret = false; 5550 goto out; 5551 } 5552 5553 /* check/update if AP changed anything in assoc response vs. scan */ 5554 if (ieee80211_config_bw(link, elems, 5555 link_id == assoc_data->assoc_link_id, 5556 changed, 5557 le16_to_cpu(mgmt->frame_control) & 5558 IEEE80211_FCTL_STYPE)) { 5559 ret = false; 5560 goto out; 5561 } 5562 5563 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5564 ret = false; 5565 goto out; 5566 } 5567 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5568 5569 /* Set up internal HT/VHT capabilities */ 5570 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5571 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5572 elems->ht_cap_elem, 5573 link_sta); 5574 5575 if (elems->vht_cap_elem && 5576 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5577 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5578 const struct cfg80211_bss_ies *ies; 5579 5580 /* 5581 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5582 * too large maximum MPDU length in the association response 5583 * (indicating 12k) that it cannot actually process ... 5584 * Work around that. 5585 */ 5586 rcu_read_lock(); 5587 ies = rcu_dereference(cbss->ies); 5588 if (ies) { 5589 const struct element *elem; 5590 5591 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5592 ies->data, ies->len); 5593 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5594 bss_vht_cap = (const void *)elem->data; 5595 } 5596 5597 if (ieee80211_hw_check(&local->hw, STRICT) && 5598 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5599 sizeof(*bss_vht_cap)))) { 5600 rcu_read_unlock(); 5601 ret = false; 5602 link_info(link, "VHT capabilities mismatch\n"); 5603 goto out; 5604 } 5605 5606 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5607 elems->vht_cap_elem, 5608 bss_vht_cap, link_sta); 5609 rcu_read_unlock(); 5610 } 5611 5612 if (elems->he_operation && 5613 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5614 elems->he_cap) { 5615 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5616 elems->he_cap, 5617 elems->he_cap_len, 5618 elems->he_6ghz_capa, 5619 link_sta); 5620 5621 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5622 if (elems->rsnx && elems->rsnx_len && 5623 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5624 wiphy_ext_feature_isset(local->hw.wiphy, 5625 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5626 bss_conf->twt_protected = true; 5627 else 5628 bss_conf->twt_protected = false; 5629 5630 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5631 link_sta, elems); 5632 5633 if (elems->eht_operation && elems->eht_cap && 5634 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5635 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5636 elems->he_cap, 5637 elems->he_cap_len, 5638 elems->eht_cap, 5639 elems->eht_cap_len, 5640 link_sta); 5641 5642 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5643 bss_conf->epcs_support = bss_conf->eht_support && 5644 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5645 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5646 5647 /* EPCS might be already enabled but a new added link 5648 * does not support EPCS. This should not really happen 5649 * in practice. 5650 */ 5651 if (sdata->u.mgd.epcs.enabled && 5652 !bss_conf->epcs_support) 5653 ieee80211_epcs_teardown(sdata); 5654 } else { 5655 bss_conf->eht_support = false; 5656 bss_conf->epcs_support = false; 5657 } 5658 } else { 5659 bss_conf->he_support = false; 5660 bss_conf->twt_requester = false; 5661 bss_conf->twt_protected = false; 5662 bss_conf->eht_support = false; 5663 bss_conf->epcs_support = false; 5664 } 5665 5666 if (elems->uhr_operation && elems->uhr_cap && 5667 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_UHR) { 5668 ieee80211_uhr_cap_ie_to_sta_uhr_cap(sdata, sband, 5669 elems->uhr_cap, 5670 elems->uhr_cap_len, 5671 link_sta); 5672 5673 bss_conf->uhr_support = link_sta->pub->uhr_cap.has_uhr; 5674 } else { 5675 bss_conf->uhr_support = false; 5676 } 5677 5678 if (elems->s1g_oper && 5679 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5680 elems->s1g_capab) 5681 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5682 link_sta); 5683 5684 bss_conf->twt_broadcast = 5685 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5686 5687 if (bss_conf->he_support) { 5688 bss_conf->he_bss_color.color = 5689 le32_get_bits(elems->he_operation->he_oper_params, 5690 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5691 bss_conf->he_bss_color.partial = 5692 le32_get_bits(elems->he_operation->he_oper_params, 5693 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5694 bss_conf->he_bss_color.enabled = 5695 !le32_get_bits(elems->he_operation->he_oper_params, 5696 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5697 5698 if (bss_conf->he_bss_color.enabled) 5699 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5700 5701 bss_conf->htc_trig_based_pkt_ext = 5702 le32_get_bits(elems->he_operation->he_oper_params, 5703 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5704 bss_conf->frame_time_rts_th = 5705 le32_get_bits(elems->he_operation->he_oper_params, 5706 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5707 5708 bss_conf->uora_exists = !!elems->uora_element; 5709 if (elems->uora_element) 5710 bss_conf->uora_ocw_range = elems->uora_element[0]; 5711 5712 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5713 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5714 /* TODO: OPEN: what happens if BSS color disable is set? */ 5715 } 5716 5717 if (cbss->transmitted_bss) { 5718 bss_conf->nontransmitted = true; 5719 ether_addr_copy(bss_conf->transmitter_bssid, 5720 cbss->transmitted_bss->bssid); 5721 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5722 bss_conf->bssid_index = cbss->bssid_index; 5723 } 5724 5725 /* 5726 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5727 * in their association response, so ignore that data for our own 5728 * configuration. If it changed since the last beacon, we'll get the 5729 * next beacon and update then. 5730 */ 5731 5732 /* 5733 * If an operating mode notification IE is present, override the 5734 * NSS calculation (that would be done in rate_control_rate_init()) 5735 * and use the # of streams from that element. 5736 */ 5737 if (elems->opmode_notif && 5738 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5739 u8 nss; 5740 5741 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5742 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5743 nss += 1; 5744 link_sta->pub->rx_nss = nss; 5745 } 5746 5747 /* 5748 * Always handle WMM once after association regardless 5749 * of the first value the AP uses. Setting -1 here has 5750 * that effect because the AP values is an unsigned 5751 * 4-bit value. 5752 */ 5753 link->u.mgd.wmm_last_param_set = -1; 5754 link->u.mgd.mu_edca_last_param_set = -1; 5755 5756 if (link->u.mgd.disable_wmm_tracking) { 5757 ieee80211_set_wmm_default(link, false, false); 5758 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5759 elems->wmm_param_len, 5760 elems->mu_edca_param_set)) { 5761 /* still enable QoS since we might have HT/VHT */ 5762 ieee80211_set_wmm_default(link, false, true); 5763 /* disable WMM tracking in this case to disable 5764 * tracking WMM parameter changes in the beacon if 5765 * the parameters weren't actually valid. Doing so 5766 * avoids changing parameters very strangely when 5767 * the AP is going back and forth between valid and 5768 * invalid parameters. 5769 */ 5770 link->u.mgd.disable_wmm_tracking = true; 5771 } 5772 5773 if (elems->max_idle_period_ie) { 5774 bss_conf->max_idle_period = 5775 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5776 bss_conf->protected_keep_alive = 5777 !!(elems->max_idle_period_ie->idle_options & 5778 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5779 *changed |= BSS_CHANGED_KEEP_ALIVE; 5780 } else { 5781 bss_conf->max_idle_period = 0; 5782 bss_conf->protected_keep_alive = false; 5783 } 5784 5785 /* set assoc capability (AID was already set earlier), 5786 * ieee80211_set_associated() will tell the driver */ 5787 bss_conf->assoc_capability = capab_info; 5788 5789 ret = true; 5790 out: 5791 kfree(elems); 5792 kfree(bss_ies); 5793 return ret; 5794 } 5795 5796 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5797 struct sta_info *sta, 5798 struct link_sta_info *link_sta, 5799 struct cfg80211_bss *cbss) 5800 { 5801 struct ieee80211_sub_if_data *sdata = link->sdata; 5802 struct ieee80211_local *local = sdata->local; 5803 struct ieee80211_bss *bss = (void *)cbss->priv; 5804 u32 rates = 0, basic_rates = 0; 5805 bool have_higher_than_11mbit = false; 5806 int min_rate = INT_MAX, min_rate_index = -1; 5807 struct ieee80211_supported_band *sband; 5808 5809 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5810 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5811 5812 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5813 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5814 ieee80211_s1g_sta_rate_init(sta); 5815 return 0; 5816 } 5817 5818 sband = local->hw.wiphy->bands[cbss->channel->band]; 5819 5820 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5821 NULL, 0, 5822 &rates, &basic_rates, NULL, 5823 &have_higher_than_11mbit, 5824 &min_rate, &min_rate_index); 5825 5826 /* 5827 * This used to be a workaround for basic rates missing 5828 * in the association response frame. Now that we no 5829 * longer use the basic rates from there, it probably 5830 * doesn't happen any more, but keep the workaround so 5831 * in case some *other* APs are buggy in different ways 5832 * we can connect -- with a warning. 5833 * Allow this workaround only in case the AP provided at least 5834 * one rate. 5835 */ 5836 if (min_rate_index < 0) { 5837 link_info(link, "No legacy rates in association response\n"); 5838 return -EINVAL; 5839 } else if (!basic_rates) { 5840 link_info(link, "No basic rates, using min rate instead\n"); 5841 basic_rates = BIT(min_rate_index); 5842 } 5843 5844 if (rates) 5845 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5846 else 5847 link_info(link, "No rates found, keeping mandatory only\n"); 5848 5849 link->conf->basic_rates = basic_rates; 5850 5851 /* cf. IEEE 802.11 9.2.12 */ 5852 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5853 have_higher_than_11mbit; 5854 5855 return 0; 5856 } 5857 5858 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5859 struct cfg80211_bss *cbss) 5860 { 5861 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5862 const struct element *ht_cap_elem, *vht_cap_elem; 5863 const struct cfg80211_bss_ies *ies; 5864 const struct ieee80211_ht_cap *ht_cap; 5865 const struct ieee80211_vht_cap *vht_cap; 5866 const struct ieee80211_he_cap_elem *he_cap; 5867 const struct element *he_cap_elem; 5868 u16 mcs_80_map, mcs_160_map; 5869 int i, mcs_nss_size; 5870 bool support_160; 5871 u8 chains = 1; 5872 5873 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5874 return chains; 5875 5876 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5877 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5878 ht_cap = (void *)ht_cap_elem->data; 5879 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5880 /* 5881 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5882 * "Tx Unequal Modulation Supported" fields. 5883 */ 5884 } 5885 5886 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5887 return chains; 5888 5889 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5890 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5891 u8 nss; 5892 u16 tx_mcs_map; 5893 5894 vht_cap = (void *)vht_cap_elem->data; 5895 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5896 for (nss = 8; nss > 0; nss--) { 5897 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5898 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5899 break; 5900 } 5901 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5902 chains = max(chains, nss); 5903 } 5904 5905 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5906 return chains; 5907 5908 ies = rcu_dereference(cbss->ies); 5909 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5910 ies->data, ies->len); 5911 5912 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5913 return chains; 5914 5915 /* skip one byte ext_tag_id */ 5916 he_cap = (void *)(he_cap_elem->data + 1); 5917 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5918 5919 /* invalid HE IE */ 5920 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5921 return chains; 5922 5923 /* mcs_nss is right after he_cap info */ 5924 he_mcs_nss_supp = (void *)(he_cap + 1); 5925 5926 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5927 5928 for (i = 7; i >= 0; i--) { 5929 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5930 5931 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5932 chains = max_t(u8, chains, i + 1); 5933 break; 5934 } 5935 } 5936 5937 support_160 = he_cap->phy_cap_info[0] & 5938 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5939 5940 if (!support_160) 5941 return chains; 5942 5943 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5944 for (i = 7; i >= 0; i--) { 5945 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5946 5947 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5948 chains = max_t(u8, chains, i + 1); 5949 break; 5950 } 5951 } 5952 5953 return chains; 5954 } 5955 5956 static void 5957 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5958 struct ieee80211_supported_band *sband, 5959 struct cfg80211_assoc_request *req, 5960 bool wmm_used, int link_id, 5961 struct ieee80211_conn_settings *conn) 5962 { 5963 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5964 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5965 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5966 const struct ieee80211_sta_he_cap *he_cap; 5967 const struct ieee80211_sta_eht_cap *eht_cap; 5968 const struct ieee80211_sta_uhr_cap *uhr_cap; 5969 struct ieee80211_sta_vht_cap vht_cap; 5970 5971 if (sband->band == NL80211_BAND_S1GHZ) { 5972 conn->mode = IEEE80211_CONN_MODE_S1G; 5973 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5974 mlme_dbg(sdata, "operating as S1G STA\n"); 5975 return; 5976 } 5977 5978 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5979 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5980 5981 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5982 5983 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5984 mlme_link_id_dbg(sdata, link_id, 5985 "HT disabled by flag, limiting to legacy\n"); 5986 goto out; 5987 } 5988 5989 if (!wmm_used) { 5990 mlme_link_id_dbg(sdata, link_id, 5991 "WMM/QoS not supported, limiting to legacy\n"); 5992 goto out; 5993 } 5994 5995 if (req) { 5996 unsigned int i; 5997 5998 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5999 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 6000 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 6001 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 6002 netdev_info(sdata->dev, 6003 "WEP/TKIP use, limiting to legacy\n"); 6004 goto out; 6005 } 6006 } 6007 } 6008 6009 if (!sta_ht_cap.ht_supported && !is_6ghz) { 6010 mlme_link_id_dbg(sdata, link_id, 6011 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 6012 goto out; 6013 } 6014 6015 /* HT is fine */ 6016 conn->mode = IEEE80211_CONN_MODE_HT; 6017 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 6018 IEEE80211_CONN_BW_LIMIT_40 : 6019 IEEE80211_CONN_BW_LIMIT_20; 6020 6021 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 6022 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 6023 6024 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 6025 mlme_link_id_dbg(sdata, link_id, 6026 "VHT disabled by flag, limiting to HT\n"); 6027 goto out; 6028 } 6029 6030 if (vht_cap.vht_supported && is_5ghz) { 6031 bool have_80mhz = false; 6032 unsigned int i; 6033 6034 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 6035 mlme_link_id_dbg(sdata, link_id, 6036 "no 40 MHz support on 5 GHz, limiting to HT\n"); 6037 goto out; 6038 } 6039 6040 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 6041 for (i = 0; i < sband->n_channels; i++) { 6042 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 6043 IEEE80211_CHAN_NO_80MHZ)) 6044 continue; 6045 6046 have_80mhz = true; 6047 break; 6048 } 6049 6050 if (!have_80mhz) { 6051 mlme_link_id_dbg(sdata, link_id, 6052 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 6053 goto out; 6054 } 6055 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 6056 mlme_link_id_dbg(sdata, link_id, 6057 "no VHT support on 5 GHz, limiting to HT\n"); 6058 goto out; 6059 } 6060 6061 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 6062 if (sband->band != NL80211_BAND_2GHZ) { 6063 conn->mode = IEEE80211_CONN_MODE_VHT; 6064 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 6065 } 6066 6067 if (is_5ghz && 6068 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 6069 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 6070 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 6071 mlme_link_id_dbg(sdata, link_id, 6072 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 6073 } 6074 6075 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 6076 mlme_link_id_dbg(sdata, link_id, 6077 "HE disabled by flag, limiting to HT/VHT\n"); 6078 goto out; 6079 } 6080 6081 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 6082 if (!he_cap) { 6083 WARN_ON(is_6ghz); 6084 mlme_link_id_dbg(sdata, link_id, 6085 "no HE support, limiting to HT/VHT\n"); 6086 goto out; 6087 } 6088 6089 /* so we have HE */ 6090 conn->mode = IEEE80211_CONN_MODE_HE; 6091 6092 /* check bandwidth */ 6093 switch (sband->band) { 6094 default: 6095 case NL80211_BAND_2GHZ: 6096 if (he_cap->he_cap_elem.phy_cap_info[0] & 6097 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 6098 break; 6099 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6100 mlme_link_id_dbg(sdata, link_id, 6101 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 6102 break; 6103 case NL80211_BAND_5GHZ: 6104 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6105 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 6106 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 6107 mlme_link_id_dbg(sdata, link_id, 6108 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 6109 break; 6110 } 6111 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 6112 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 6113 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6114 conn->bw_limit, 6115 IEEE80211_CONN_BW_LIMIT_80); 6116 mlme_link_id_dbg(sdata, link_id, 6117 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 6118 } 6119 break; 6120 case NL80211_BAND_6GHZ: 6121 if (he_cap->he_cap_elem.phy_cap_info[0] & 6122 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 6123 break; 6124 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6125 conn->bw_limit, 6126 IEEE80211_CONN_BW_LIMIT_80); 6127 mlme_link_id_dbg(sdata, link_id, 6128 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 6129 break; 6130 } 6131 6132 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 6133 mlme_link_id_dbg(sdata, link_id, 6134 "EHT disabled by flag, limiting to HE\n"); 6135 goto out; 6136 } 6137 6138 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 6139 if (!eht_cap) { 6140 mlme_link_id_dbg(sdata, link_id, 6141 "no EHT support, limiting to HE\n"); 6142 goto out; 6143 } 6144 conn->mode = IEEE80211_CONN_MODE_EHT; 6145 6146 /* check bandwidth */ 6147 if (is_6ghz && 6148 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 6149 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 6150 else if (is_6ghz) 6151 mlme_link_id_dbg(sdata, link_id, 6152 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 6153 6154 if (req && req->flags & ASSOC_REQ_DISABLE_UHR) { 6155 mlme_link_id_dbg(sdata, link_id, 6156 "UHR disabled by flag, limiting to EHT\n"); 6157 goto out; 6158 } 6159 6160 uhr_cap = ieee80211_get_uhr_iftype_cap_vif(sband, &sdata->vif); 6161 if (!uhr_cap) { 6162 mlme_link_id_dbg(sdata, link_id, 6163 "no UHR support, limiting to EHT\n"); 6164 goto out; 6165 } 6166 conn->mode = IEEE80211_CONN_MODE_UHR; 6167 6168 out: 6169 mlme_link_id_dbg(sdata, link_id, 6170 "determined local STA to be %s, BW limited to %d MHz\n", 6171 ieee80211_conn_mode_str(conn->mode), 6172 20 * (1 << conn->bw_limit)); 6173 } 6174 6175 static void 6176 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6177 struct ieee80211_supported_band *sband, 6178 struct cfg80211_auth_request *req, 6179 bool wmm_used, 6180 struct ieee80211_conn_settings *conn) 6181 { 6182 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6183 req->link_id > 0 ? req->link_id : 0, 6184 conn); 6185 } 6186 6187 static void 6188 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6189 struct ieee80211_supported_band *sband, 6190 struct cfg80211_assoc_request *req, 6191 bool wmm_used, int link_id, 6192 struct ieee80211_conn_settings *conn) 6193 { 6194 struct ieee80211_conn_settings tmp; 6195 6196 WARN_ON(!req); 6197 6198 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6199 &tmp); 6200 6201 conn->mode = min_t(enum ieee80211_conn_mode, 6202 conn->mode, tmp.mode); 6203 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6204 conn->bw_limit, tmp.bw_limit); 6205 } 6206 6207 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6208 struct ieee80211_link_data *link, 6209 int link_id, 6210 struct cfg80211_bss *cbss, bool mlo, 6211 struct ieee80211_conn_settings *conn, 6212 unsigned long *userspace_selectors) 6213 { 6214 struct ieee80211_local *local = sdata->local; 6215 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6216 struct ieee80211_chan_req chanreq = {}; 6217 struct cfg80211_chan_def ap_chandef; 6218 struct ieee802_11_elems *elems; 6219 int ret; 6220 6221 lockdep_assert_wiphy(local->hw.wiphy); 6222 6223 rcu_read_lock(); 6224 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6225 &chanreq, &ap_chandef, 6226 userspace_selectors); 6227 6228 if (IS_ERR(elems)) { 6229 rcu_read_unlock(); 6230 return PTR_ERR(elems); 6231 } 6232 6233 if (mlo && !elems->ml_basic) { 6234 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6235 rcu_read_unlock(); 6236 kfree(elems); 6237 return -EINVAL; 6238 } 6239 6240 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6241 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6242 6243 if (elems->pwr_constr_elem) 6244 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6245 6246 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6247 if (he_6ghz_oper) 6248 link->conf->power_type = 6249 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6250 cbss->channel->flags); 6251 else 6252 link_info(link, 6253 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6254 cbss->channel->center_freq); 6255 6256 link->conf->tpe = elems->tpe; 6257 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6258 &chanreq.oper); 6259 } 6260 rcu_read_unlock(); 6261 /* the element data was RCU protected so no longer valid anyway */ 6262 kfree(elems); 6263 elems = NULL; 6264 6265 if (!link) 6266 return 0; 6267 6268 rcu_read_lock(); 6269 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6270 local->rx_chains); 6271 rcu_read_unlock(); 6272 6273 /* 6274 * If this fails (possibly due to channel context sharing 6275 * on incompatible channels, e.g. 80+80 and 160 sharing the 6276 * same control channel) try to use a smaller bandwidth. 6277 */ 6278 ret = ieee80211_link_use_channel(link, &chanreq, 6279 IEEE80211_CHANCTX_SHARED); 6280 6281 /* don't downgrade for 5/10/S1G MHz channels, though. */ 6282 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6283 chanreq.oper.width == NL80211_CHAN_WIDTH_10 || 6284 cfg80211_chandef_is_s1g(&chanreq.oper)) 6285 return ret; 6286 6287 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6288 ieee80211_chanreq_downgrade(&chanreq, conn); 6289 6290 ret = ieee80211_link_use_channel(link, &chanreq, 6291 IEEE80211_CHANCTX_SHARED); 6292 } 6293 6294 return ret; 6295 } 6296 6297 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6298 u8 *dtim_count, u8 *dtim_period) 6299 { 6300 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6301 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6302 ies->len); 6303 const struct ieee80211_tim_ie *tim = NULL; 6304 const struct ieee80211_bssid_index *idx; 6305 bool valid = tim_ie && tim_ie[1] >= 2; 6306 6307 if (valid) 6308 tim = (void *)(tim_ie + 2); 6309 6310 if (dtim_count) 6311 *dtim_count = valid ? tim->dtim_count : 0; 6312 6313 if (dtim_period) 6314 *dtim_period = valid ? tim->dtim_period : 0; 6315 6316 /* Check if value is overridden by non-transmitted profile */ 6317 if (!idx_ie || idx_ie[1] < 3) 6318 return valid; 6319 6320 idx = (void *)(idx_ie + 2); 6321 6322 if (dtim_count) 6323 *dtim_count = idx->dtim_count; 6324 6325 if (dtim_period) 6326 *dtim_period = idx->dtim_period; 6327 6328 return true; 6329 } 6330 6331 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6332 { 6333 if (bm_size == 1) 6334 return *data; 6335 6336 return get_unaligned_le16(data); 6337 } 6338 6339 static int 6340 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6341 const struct ieee80211_ttlm_elem *ttlm, 6342 struct ieee80211_adv_ttlm_info *ttlm_info) 6343 { 6344 /* The element size was already validated in 6345 * ieee80211_tid_to_link_map_size_ok() 6346 */ 6347 u8 control, link_map_presence, map_size, tid; 6348 u8 *pos; 6349 6350 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6351 pos = (void *)ttlm->optional; 6352 control = ttlm->control; 6353 6354 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6355 IEEE80211_TTLM_DIRECTION_BOTH) { 6356 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6357 return -EINVAL; 6358 } 6359 6360 if (!(control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP)) { 6361 link_map_presence = *pos; 6362 pos++; 6363 } 6364 6365 if (control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT) { 6366 ttlm_info->switch_time = get_unaligned_le16(pos); 6367 6368 /* Since ttlm_info->switch_time == 0 means no switch time, bump 6369 * it by 1. 6370 */ 6371 if (!ttlm_info->switch_time) 6372 ttlm_info->switch_time = 1; 6373 6374 pos += 2; 6375 } 6376 6377 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6378 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6379 pos += 3; 6380 } 6381 6382 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6383 ttlm_info->map = 0xffff; 6384 return 0; 6385 } 6386 6387 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6388 map_size = 1; 6389 else 6390 map_size = 2; 6391 6392 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6393 * not advertise a TID-to-link mapping that does not map all TIDs to the 6394 * same link set, reject frame if not all links have mapping 6395 */ 6396 if (link_map_presence != 0xff) { 6397 sdata_info(sdata, 6398 "Invalid advertised T2L mapping presence indicator\n"); 6399 return -EINVAL; 6400 } 6401 6402 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6403 if (!ttlm_info->map) { 6404 sdata_info(sdata, 6405 "Invalid advertised T2L map for TID 0\n"); 6406 return -EINVAL; 6407 } 6408 6409 pos += map_size; 6410 6411 for (tid = 1; tid < 8; tid++) { 6412 u16 map = ieee80211_get_ttlm(map_size, pos); 6413 6414 if (map != ttlm_info->map) { 6415 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6416 tid); 6417 return -EINVAL; 6418 } 6419 6420 pos += map_size; 6421 } 6422 return 0; 6423 } 6424 6425 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6426 struct ieee80211_mgmt *mgmt, 6427 struct ieee802_11_elems *elems, 6428 const u8 *elem_start, unsigned int elem_len) 6429 { 6430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6431 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6432 struct ieee80211_local *local = sdata->local; 6433 unsigned int link_id; 6434 struct sta_info *sta; 6435 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6436 u16 valid_links = 0, dormant_links = 0; 6437 int err; 6438 6439 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6440 /* 6441 * station info was already allocated and inserted before 6442 * the association and should be available to us 6443 */ 6444 sta = sta_info_get(sdata, assoc_data->ap_addr); 6445 if (WARN_ON(!sta)) 6446 goto out_err; 6447 6448 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6449 6450 if (ieee80211_vif_is_mld(&sdata->vif)) { 6451 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6452 if (!assoc_data->link[link_id].bss) 6453 continue; 6454 6455 valid_links |= BIT(link_id); 6456 6457 if (link_id != assoc_data->assoc_link_id) { 6458 err = ieee80211_sta_allocate_link(sta, link_id); 6459 if (err) 6460 goto out_err; 6461 } 6462 } 6463 6464 /* 6465 * We do not support setting a negotiated TTLM during 6466 * association. As such, we can assume that if there is a TTLM, 6467 * then it is the currently active advertised TTLM. 6468 * In that case, there must be exactly one TTLM that does not 6469 * have a switch time set. This mapping should also leave us 6470 * with at least one usable link. 6471 */ 6472 if (elems->ttlm_num > 1) { 6473 sdata_info(sdata, 6474 "More than one advertised TTLM in association response\n"); 6475 goto out_err; 6476 } else if (elems->ttlm_num == 1) { 6477 if (ieee80211_parse_adv_t2l(sdata, elems->ttlm[0], 6478 &sdata->u.mgd.ttlm_info) || 6479 sdata->u.mgd.ttlm_info.switch_time != 0 || 6480 !(valid_links & sdata->u.mgd.ttlm_info.map)) { 6481 sdata_info(sdata, 6482 "Invalid advertised TTLM in association response\n"); 6483 goto out_err; 6484 } 6485 6486 sdata->u.mgd.ttlm_info.active = true; 6487 dormant_links = 6488 valid_links & ~sdata->u.mgd.ttlm_info.map; 6489 } 6490 6491 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6492 } 6493 6494 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6495 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6496 struct ieee80211_link_data *link; 6497 struct link_sta_info *link_sta; 6498 6499 if (!cbss) 6500 continue; 6501 6502 link = sdata_dereference(sdata->link[link_id], sdata); 6503 if (WARN_ON(!link)) 6504 goto out_err; 6505 6506 if (ieee80211_vif_is_mld(&sdata->vif)) 6507 link_info(link, 6508 "local address %pM, AP link address %pM%s\n", 6509 link->conf->addr, 6510 assoc_data->link[link_id].bss->bssid, 6511 link_id == assoc_data->assoc_link_id ? 6512 " (assoc)" : ""); 6513 6514 link_sta = rcu_dereference_protected(sta->link[link_id], 6515 lockdep_is_held(&local->hw.wiphy->mtx)); 6516 if (WARN_ON(!link_sta)) 6517 goto out_err; 6518 6519 if (!link->u.mgd.have_beacon) { 6520 const struct cfg80211_bss_ies *ies; 6521 6522 rcu_read_lock(); 6523 ies = rcu_dereference(cbss->beacon_ies); 6524 if (ies) 6525 link->u.mgd.have_beacon = true; 6526 else 6527 ies = rcu_dereference(cbss->ies); 6528 ieee80211_get_dtim(ies, 6529 &link->conf->sync_dtim_count, 6530 &link->u.mgd.dtim_period); 6531 link->conf->beacon_int = cbss->beacon_interval; 6532 rcu_read_unlock(); 6533 } 6534 6535 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6536 6537 if (link_id != assoc_data->assoc_link_id) { 6538 link->u.mgd.conn = assoc_data->link[link_id].conn; 6539 6540 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6541 true, &link->u.mgd.conn, 6542 sdata->u.mgd.userspace_selectors); 6543 if (err) { 6544 link_info(link, "prep_channel failed\n"); 6545 goto out_err; 6546 } 6547 } 6548 6549 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6550 assoc_data->link[link_id].bss); 6551 if (err) 6552 goto out_err; 6553 6554 if (!ieee80211_assoc_config_link(link, link_sta, 6555 assoc_data->link[link_id].bss, 6556 mgmt, elem_start, elem_len, 6557 &changed[link_id])) 6558 goto out_err; 6559 6560 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6561 valid_links &= ~BIT(link_id); 6562 ieee80211_sta_remove_link(sta, link_id); 6563 continue; 6564 } 6565 6566 if (link_id != assoc_data->assoc_link_id) { 6567 err = ieee80211_sta_activate_link(sta, link_id); 6568 if (err) 6569 goto out_err; 6570 } 6571 } 6572 6573 /* links might have changed due to rejected ones, set them again */ 6574 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6575 6576 rate_control_rate_init_all_links(sta); 6577 6578 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6579 set_sta_flag(sta, WLAN_STA_MFP); 6580 sta->sta.mfp = true; 6581 } else { 6582 sta->sta.mfp = false; 6583 } 6584 6585 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6586 elems->ext_capab_len); 6587 6588 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6589 local->hw.queues >= IEEE80211_NUM_ACS; 6590 6591 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6592 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6593 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6594 if (err) { 6595 sdata_info(sdata, 6596 "failed to move station %pM to desired state\n", 6597 sta->sta.addr); 6598 WARN_ON(__sta_info_destroy(sta)); 6599 goto out_err; 6600 } 6601 6602 if (sdata->wdev.use_4addr) 6603 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6604 6605 ieee80211_set_associated(sdata, assoc_data, changed); 6606 6607 /* 6608 * If we're using 4-addr mode, let the AP know that we're 6609 * doing so, so that it can create the STA VLAN on its side 6610 */ 6611 if (ifmgd->use_4addr) 6612 ieee80211_send_4addr_nullfunc(local, sdata); 6613 6614 /* 6615 * Start timer to probe the connection to the AP now. 6616 * Also start the timer that will detect beacon loss. 6617 */ 6618 ieee80211_sta_reset_beacon_monitor(sdata); 6619 ieee80211_sta_reset_conn_monitor(sdata); 6620 6621 return true; 6622 out_err: 6623 eth_zero_addr(sdata->vif.cfg.ap_addr); 6624 return false; 6625 } 6626 6627 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6628 struct ieee80211_mgmt *mgmt, 6629 size_t len) 6630 { 6631 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6632 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6633 u16 capab_info, status_code, aid; 6634 struct ieee80211_elems_parse_params parse_params = { 6635 .bss = NULL, 6636 .link_id = -1, 6637 .from_ap = true, 6638 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 6639 }; 6640 struct ieee802_11_elems *elems; 6641 int ac; 6642 const u8 *elem_start; 6643 unsigned int elem_len; 6644 bool reassoc; 6645 struct ieee80211_event event = { 6646 .type = MLME_EVENT, 6647 .u.mlme.data = ASSOC_EVENT, 6648 }; 6649 struct ieee80211_prep_tx_info info = {}; 6650 struct cfg80211_rx_assoc_resp_data resp = { 6651 .uapsd_queues = -1, 6652 }; 6653 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6654 unsigned int link_id; 6655 u16 max_aid = IEEE80211_MAX_AID; 6656 6657 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6658 6659 if (!assoc_data) 6660 return; 6661 6662 info.link_id = assoc_data->assoc_link_id; 6663 6664 parse_params.mode = 6665 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6666 6667 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6668 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6669 return; 6670 6671 /* 6672 * AssocResp and ReassocResp have identical structure, so process both 6673 * of them in this function. 6674 */ 6675 6676 if (len < 24 + 6) 6677 return; 6678 6679 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6680 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6681 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6682 if (assoc_data->s1g) { 6683 elem_start = mgmt->u.s1g_assoc_resp.variable; 6684 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6685 } else { 6686 elem_start = mgmt->u.assoc_resp.variable; 6687 } 6688 6689 /* 6690 * Note: this may not be perfect, AP might misbehave - if 6691 * anyone needs to rely on perfect complete notification 6692 * with the exact right subtype, then we need to track what 6693 * we actually transmitted. 6694 */ 6695 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6696 IEEE80211_STYPE_ASSOC_REQ; 6697 6698 if (assoc_data->fils_kek_len && 6699 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6700 return; 6701 6702 elem_len = len - (elem_start - (u8 *)mgmt); 6703 parse_params.start = elem_start; 6704 parse_params.len = elem_len; 6705 elems = ieee802_11_parse_elems_full(&parse_params); 6706 if (!elems) 6707 goto notify_driver; 6708 6709 if (elems->aid_resp) 6710 aid = le16_to_cpu(elems->aid_resp->aid); 6711 else 6712 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6713 6714 /* 6715 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6716 * an S1G STA the 3 MSBs are reserved. 6717 * (802.11-2016 9.4.1.8 AID field). 6718 */ 6719 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6720 6721 sdata_info(sdata, 6722 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6723 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6724 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6725 6726 ifmgd->broken_ap = false; 6727 6728 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6729 elems->timeout_int && 6730 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6731 u32 tu, ms; 6732 6733 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6734 le32_to_cpu(elems->timeout_int->value)); 6735 6736 tu = le32_to_cpu(elems->timeout_int->value); 6737 ms = tu * 1024 / 1000; 6738 sdata_info(sdata, 6739 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6740 assoc_data->ap_addr, tu, ms); 6741 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6742 assoc_data->timeout_started = true; 6743 assoc_data->comeback = true; 6744 if (ms > IEEE80211_ASSOC_TIMEOUT) 6745 run_again(sdata, assoc_data->timeout); 6746 goto notify_driver; 6747 } 6748 6749 if (status_code != WLAN_STATUS_SUCCESS) { 6750 sdata_info(sdata, "%pM denied association (code=%d)\n", 6751 assoc_data->ap_addr, status_code); 6752 event.u.mlme.status = MLME_DENIED; 6753 event.u.mlme.reason = status_code; 6754 drv_event_callback(sdata->local, sdata, &event); 6755 } else { 6756 if (aid == 0 || aid > max_aid) { 6757 sdata_info(sdata, 6758 "invalid AID value %d (out of range), turn off PS\n", 6759 aid); 6760 aid = 0; 6761 ifmgd->broken_ap = true; 6762 } 6763 6764 if (ieee80211_vif_is_mld(&sdata->vif)) { 6765 struct ieee80211_mle_basic_common_info *common; 6766 6767 if (!elems->ml_basic) { 6768 sdata_info(sdata, 6769 "MLO association with %pM but no (basic) multi-link element in response!\n", 6770 assoc_data->ap_addr); 6771 goto abandon_assoc; 6772 } 6773 6774 common = (void *)elems->ml_basic->variable; 6775 6776 if (memcmp(assoc_data->ap_addr, 6777 common->mld_mac_addr, ETH_ALEN)) { 6778 sdata_info(sdata, 6779 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6780 common->mld_mac_addr, 6781 assoc_data->ap_addr); 6782 goto abandon_assoc; 6783 } 6784 6785 sdata->vif.cfg.eml_cap = 6786 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6787 sdata->vif.cfg.eml_med_sync_delay = 6788 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6789 sdata->vif.cfg.mld_capa_op = 6790 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6791 } 6792 6793 sdata->vif.cfg.aid = aid; 6794 sdata->vif.cfg.s1g = assoc_data->s1g; 6795 6796 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6797 elem_start, elem_len)) { 6798 /* oops -- internal error -- send timeout for now */ 6799 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6800 goto notify_driver; 6801 } 6802 event.u.mlme.status = MLME_SUCCESS; 6803 drv_event_callback(sdata->local, sdata, &event); 6804 sdata_info(sdata, "associated\n"); 6805 6806 info.success = 1; 6807 } 6808 6809 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6810 struct ieee80211_link_data *link; 6811 6812 if (!assoc_data->link[link_id].bss) 6813 continue; 6814 6815 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6816 ether_addr_copy(resp.links[link_id].addr, 6817 assoc_data->link[link_id].addr); 6818 resp.links[link_id].status = assoc_data->link[link_id].status; 6819 6820 link = sdata_dereference(sdata->link[link_id], sdata); 6821 if (!link) 6822 continue; 6823 6824 /* get uapsd queues configuration - same for all links */ 6825 resp.uapsd_queues = 0; 6826 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6827 if (link->tx_conf[ac].uapsd) 6828 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6829 } 6830 6831 if (ieee80211_vif_is_mld(&sdata->vif)) { 6832 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6833 resp.ap_mld_addr = ap_mld_addr; 6834 } 6835 6836 ieee80211_destroy_assoc_data(sdata, 6837 status_code == WLAN_STATUS_SUCCESS ? 6838 ASSOC_SUCCESS : 6839 ASSOC_REJECTED); 6840 6841 resp.buf = (u8 *)mgmt; 6842 resp.len = len; 6843 resp.req_ies = ifmgd->assoc_req_ies; 6844 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6845 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6846 notify_driver: 6847 drv_mgd_complete_tx(sdata->local, sdata, &info); 6848 kfree(elems); 6849 return; 6850 abandon_assoc: 6851 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6852 goto notify_driver; 6853 } 6854 6855 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6856 struct ieee80211_mgmt *mgmt, size_t len, 6857 struct ieee80211_rx_status *rx_status) 6858 { 6859 struct ieee80211_sub_if_data *sdata = link->sdata; 6860 struct ieee80211_local *local = sdata->local; 6861 struct ieee80211_bss *bss; 6862 struct ieee80211_channel *channel; 6863 6864 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6865 6866 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6867 ieee80211_rx_status_to_khz(rx_status)); 6868 if (!channel) 6869 return; 6870 6871 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6872 if (bss) { 6873 link->conf->beacon_rate = bss->beacon_rate; 6874 ieee80211_rx_bss_put(local, bss); 6875 } 6876 } 6877 6878 6879 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6880 struct sk_buff *skb) 6881 { 6882 struct ieee80211_sub_if_data *sdata = link->sdata; 6883 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6884 struct ieee80211_if_managed *ifmgd; 6885 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6886 struct ieee80211_channel *channel; 6887 size_t baselen, len = skb->len; 6888 6889 ifmgd = &sdata->u.mgd; 6890 6891 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6892 6893 /* 6894 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6895 * "If a 6 GHz AP receives a Probe Request frame and responds with 6896 * a Probe Response frame [..], the Address 1 field of the Probe 6897 * Response frame shall be set to the broadcast address [..]" 6898 * So, on 6GHz band we should also accept broadcast responses. 6899 */ 6900 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 6901 ieee80211_rx_status_to_khz(rx_status)); 6902 if (!channel) 6903 return; 6904 6905 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6906 (channel->band != NL80211_BAND_6GHZ || 6907 !is_broadcast_ether_addr(mgmt->da))) 6908 return; /* ignore ProbeResp to foreign address */ 6909 6910 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6911 if (baselen > len) 6912 return; 6913 6914 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6915 6916 if (ifmgd->associated && 6917 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6918 ieee80211_reset_ap_probe(sdata); 6919 } 6920 6921 /* 6922 * This is the canonical list of information elements we care about, 6923 * the filter code also gives us all changes to the Microsoft OUI 6924 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6925 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6926 * changes to requested client power. 6927 * 6928 * We implement beacon filtering in software since that means we can 6929 * avoid processing the frame here and in cfg80211, and userspace 6930 * will not be able to tell whether the hardware supports it or not. 6931 * 6932 * XXX: This list needs to be dynamic -- userspace needs to be able to 6933 * add items it requires. It also needs to be able to tell us to 6934 * look out for other vendor IEs. 6935 */ 6936 static const u64 care_about_ies = 6937 (1ULL << WLAN_EID_COUNTRY) | 6938 (1ULL << WLAN_EID_ERP_INFO) | 6939 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6940 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6941 (1ULL << WLAN_EID_HT_CAPABILITY) | 6942 (1ULL << WLAN_EID_HT_OPERATION) | 6943 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6944 6945 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6946 struct ieee80211_if_managed *ifmgd, 6947 struct ieee80211_bss_conf *bss_conf, 6948 struct ieee80211_local *local, 6949 struct ieee80211_rx_status *rx_status) 6950 { 6951 struct ieee80211_sub_if_data *sdata = link->sdata; 6952 6953 /* Track average RSSI from the Beacon frames of the current AP */ 6954 6955 if (!link->u.mgd.tracking_signal_avg) { 6956 link->u.mgd.tracking_signal_avg = true; 6957 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6958 link->u.mgd.last_cqm_event_signal = 0; 6959 link->u.mgd.count_beacon_signal = 1; 6960 link->u.mgd.last_ave_beacon_signal = 0; 6961 } else { 6962 link->u.mgd.count_beacon_signal++; 6963 } 6964 6965 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6966 -rx_status->signal); 6967 6968 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6969 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6970 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6971 int last_sig = link->u.mgd.last_ave_beacon_signal; 6972 struct ieee80211_event event = { 6973 .type = RSSI_EVENT, 6974 }; 6975 6976 /* 6977 * if signal crosses either of the boundaries, invoke callback 6978 * with appropriate parameters 6979 */ 6980 if (sig > ifmgd->rssi_max_thold && 6981 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6982 link->u.mgd.last_ave_beacon_signal = sig; 6983 event.u.rssi.data = RSSI_EVENT_HIGH; 6984 drv_event_callback(local, sdata, &event); 6985 } else if (sig < ifmgd->rssi_min_thold && 6986 (last_sig >= ifmgd->rssi_max_thold || 6987 last_sig == 0)) { 6988 link->u.mgd.last_ave_beacon_signal = sig; 6989 event.u.rssi.data = RSSI_EVENT_LOW; 6990 drv_event_callback(local, sdata, &event); 6991 } 6992 } 6993 6994 if (bss_conf->cqm_rssi_thold && 6995 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6996 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6997 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6998 int last_event = link->u.mgd.last_cqm_event_signal; 6999 int thold = bss_conf->cqm_rssi_thold; 7000 int hyst = bss_conf->cqm_rssi_hyst; 7001 7002 if (sig < thold && 7003 (last_event == 0 || sig < last_event - hyst)) { 7004 link->u.mgd.last_cqm_event_signal = sig; 7005 ieee80211_cqm_rssi_notify( 7006 &sdata->vif, 7007 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7008 sig, GFP_KERNEL); 7009 } else if (sig > thold && 7010 (last_event == 0 || sig > last_event + hyst)) { 7011 link->u.mgd.last_cqm_event_signal = sig; 7012 ieee80211_cqm_rssi_notify( 7013 &sdata->vif, 7014 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7015 sig, GFP_KERNEL); 7016 } 7017 } 7018 7019 if (bss_conf->cqm_rssi_low && 7020 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 7021 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 7022 int last_event = link->u.mgd.last_cqm_event_signal; 7023 int low = bss_conf->cqm_rssi_low; 7024 int high = bss_conf->cqm_rssi_high; 7025 7026 if (sig < low && 7027 (last_event == 0 || last_event >= low)) { 7028 link->u.mgd.last_cqm_event_signal = sig; 7029 ieee80211_cqm_rssi_notify( 7030 &sdata->vif, 7031 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 7032 sig, GFP_KERNEL); 7033 } else if (sig > high && 7034 (last_event == 0 || last_event <= high)) { 7035 link->u.mgd.last_cqm_event_signal = sig; 7036 ieee80211_cqm_rssi_notify( 7037 &sdata->vif, 7038 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 7039 sig, GFP_KERNEL); 7040 } 7041 } 7042 } 7043 7044 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 7045 struct cfg80211_bss *bss) 7046 { 7047 if (ether_addr_equal(tx_bssid, bss->bssid)) 7048 return true; 7049 if (!bss->transmitted_bss) 7050 return false; 7051 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 7052 } 7053 7054 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 7055 struct wiphy_work *work) 7056 { 7057 struct ieee80211_sub_if_data *sdata = 7058 container_of(work, struct ieee80211_sub_if_data, 7059 u.mgd.ml_reconf_work.work); 7060 u16 new_valid_links, new_active_links, new_dormant_links; 7061 int ret; 7062 7063 if (!sdata->u.mgd.removed_links) 7064 return; 7065 7066 sdata_info(sdata, 7067 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 7068 sdata->vif.valid_links, sdata->u.mgd.removed_links); 7069 7070 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 7071 if (new_valid_links == sdata->vif.valid_links) 7072 return; 7073 7074 if (!new_valid_links || 7075 !(new_valid_links & ~sdata->vif.dormant_links)) { 7076 sdata_info(sdata, "No valid links after reconfiguration\n"); 7077 ret = -EINVAL; 7078 goto out; 7079 } 7080 7081 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 7082 if (new_active_links != sdata->vif.active_links) { 7083 if (!new_active_links) 7084 new_active_links = 7085 BIT(ffs(new_valid_links & 7086 ~sdata->vif.dormant_links) - 1); 7087 7088 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 7089 if (ret) { 7090 sdata_info(sdata, 7091 "Failed setting active links\n"); 7092 goto out; 7093 } 7094 } 7095 7096 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 7097 7098 ret = ieee80211_vif_set_links(sdata, new_valid_links, 7099 new_dormant_links); 7100 if (ret) 7101 sdata_info(sdata, "Failed setting valid links\n"); 7102 7103 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 7104 7105 out: 7106 if (!ret) 7107 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 7108 else 7109 __ieee80211_disconnect(sdata); 7110 7111 sdata->u.mgd.removed_links = 0; 7112 } 7113 7114 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 7115 struct ieee802_11_elems *elems) 7116 { 7117 const struct element *sub; 7118 unsigned long removed_links = 0; 7119 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7120 u8 link_id; 7121 u32 delay; 7122 7123 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 7124 return; 7125 7126 /* Directly parse the sub elements as the common information doesn't 7127 * hold any useful information. 7128 */ 7129 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 7130 elems->ml_reconf_len) { 7131 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7132 u8 *pos = prof->variable; 7133 u16 control; 7134 7135 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 7136 continue; 7137 7138 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 7139 sub->datalen)) 7140 return; 7141 7142 control = le16_to_cpu(prof->control); 7143 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 7144 7145 if (link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7146 continue; 7147 7148 removed_links |= BIT(link_id); 7149 7150 /* the MAC address should not be included, but handle it */ 7151 if (control & 7152 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 7153 pos += 6; 7154 7155 /* According to Draft P802.11be_D3.0, the control should 7156 * include the AP Removal Timer present. If the AP Removal Timer 7157 * is not present assume immediate removal. 7158 */ 7159 if (control & 7160 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 7161 link_removal_timeout[link_id] = get_unaligned_le16(pos); 7162 } 7163 7164 removed_links &= sdata->vif.valid_links; 7165 if (!removed_links) { 7166 /* In case the removal was cancelled, abort it */ 7167 if (sdata->u.mgd.removed_links) { 7168 sdata->u.mgd.removed_links = 0; 7169 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7170 &sdata->u.mgd.ml_reconf_work); 7171 } 7172 return; 7173 } 7174 7175 delay = 0; 7176 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 7177 struct ieee80211_bss_conf *link_conf = 7178 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 7179 u32 link_delay; 7180 7181 if (!link_conf) { 7182 removed_links &= ~BIT(link_id); 7183 continue; 7184 } 7185 7186 if (link_removal_timeout[link_id] < 1) 7187 link_delay = 0; 7188 else 7189 link_delay = link_conf->beacon_int * 7190 (link_removal_timeout[link_id] - 1); 7191 7192 if (!delay) 7193 delay = link_delay; 7194 else 7195 delay = min(delay, link_delay); 7196 } 7197 7198 sdata->u.mgd.removed_links = removed_links; 7199 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7200 &sdata->u.mgd.ml_reconf_work, 7201 us_to_ktime(ieee80211_tu_to_usec(delay))); 7202 } 7203 7204 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 7205 u16 active_links, u16 dormant_links, 7206 u16 suspended_links) 7207 { 7208 u64 changed = 0; 7209 int ret; 7210 7211 if (!active_links) { 7212 ret = -EINVAL; 7213 goto out; 7214 } 7215 7216 /* If there is an active negotiated TTLM, it should be discarded by 7217 * the new negotiated/advertised TTLM. 7218 */ 7219 if (sdata->vif.neg_ttlm.valid) { 7220 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7221 sdata->vif.suspended_links = 0; 7222 changed = BSS_CHANGED_MLD_TTLM; 7223 } 7224 7225 if (sdata->vif.active_links != active_links) { 7226 /* usable links are affected when active_links are changed, 7227 * so notify the driver about the status change 7228 */ 7229 changed |= BSS_CHANGED_MLD_VALID_LINKS; 7230 active_links &= sdata->vif.active_links; 7231 if (!active_links) 7232 active_links = 7233 BIT(__ffs(sdata->vif.valid_links & 7234 ~dormant_links)); 7235 ret = ieee80211_set_active_links(&sdata->vif, active_links); 7236 if (ret) { 7237 sdata_info(sdata, "Failed to set TTLM active links\n"); 7238 goto out; 7239 } 7240 } 7241 7242 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7243 dormant_links); 7244 if (ret) { 7245 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 7246 goto out; 7247 } 7248 7249 sdata->vif.suspended_links = suspended_links; 7250 if (sdata->vif.suspended_links) 7251 changed |= BSS_CHANGED_MLD_TTLM; 7252 7253 ieee80211_vif_cfg_change_notify(sdata, changed); 7254 7255 out: 7256 if (ret) 7257 ieee80211_disconnect(&sdata->vif, false); 7258 7259 return ret; 7260 } 7261 7262 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 7263 struct wiphy_work *work) 7264 { 7265 u16 new_active_links, new_dormant_links; 7266 struct ieee80211_sub_if_data *sdata = 7267 container_of(work, struct ieee80211_sub_if_data, 7268 u.mgd.ttlm_work.work); 7269 7270 new_active_links = sdata->u.mgd.ttlm_info.map & 7271 sdata->vif.valid_links; 7272 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 7273 sdata->vif.valid_links; 7274 7275 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 7276 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 7277 0)) 7278 return; 7279 7280 sdata->u.mgd.ttlm_info.active = true; 7281 sdata->u.mgd.ttlm_info.switch_time = 0; 7282 } 7283 7284 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7285 struct ieee802_11_elems *elems, 7286 u64 beacon_ts) 7287 { 7288 u8 i; 7289 int ret; 7290 7291 if (!ieee80211_vif_is_mld(&sdata->vif)) 7292 return; 7293 7294 if (!elems->ttlm_num) { 7295 if (sdata->u.mgd.ttlm_info.switch_time) { 7296 /* if a planned TID-to-link mapping was cancelled - 7297 * abort it 7298 */ 7299 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7300 &sdata->u.mgd.ttlm_work); 7301 } else if (sdata->u.mgd.ttlm_info.active) { 7302 /* if no TID-to-link element, set to default mapping in 7303 * which all TIDs are mapped to all setup links 7304 */ 7305 ret = ieee80211_vif_set_links(sdata, 7306 sdata->vif.valid_links, 7307 0); 7308 if (ret) { 7309 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7310 return; 7311 } 7312 ieee80211_vif_cfg_change_notify(sdata, 7313 BSS_CHANGED_MLD_VALID_LINKS); 7314 } 7315 memset(&sdata->u.mgd.ttlm_info, 0, 7316 sizeof(sdata->u.mgd.ttlm_info)); 7317 return; 7318 } 7319 7320 for (i = 0; i < elems->ttlm_num; i++) { 7321 struct ieee80211_adv_ttlm_info ttlm_info; 7322 u32 res; 7323 7324 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7325 &ttlm_info); 7326 7327 if (res) { 7328 __ieee80211_disconnect(sdata); 7329 return; 7330 } 7331 7332 if (ttlm_info.switch_time) { 7333 u16 beacon_ts_tu, st_tu, delay; 7334 u64 delay_usec; 7335 u64 mask; 7336 7337 /* The t2l map switch time is indicated with a partial 7338 * TSF value (bits 10 to 25), get the partial beacon TS 7339 * as well, and calc the delay to the start time. 7340 */ 7341 mask = GENMASK_ULL(25, 10); 7342 beacon_ts_tu = (beacon_ts & mask) >> 10; 7343 st_tu = ttlm_info.switch_time; 7344 delay = st_tu - beacon_ts_tu; 7345 7346 /* 7347 * If the switch time is far in the future, then it 7348 * could also be the previous switch still being 7349 * announced. 7350 * We can simply ignore it for now, if it is a future 7351 * switch the AP will continue to announce it anyway. 7352 */ 7353 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7354 return; 7355 7356 delay_usec = ieee80211_tu_to_usec(delay); 7357 7358 /* Link switching can take time, so schedule it 7359 * 100ms before to be ready on time 7360 */ 7361 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7362 delay_usec -= 7363 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7364 else 7365 delay_usec = 0; 7366 7367 sdata->u.mgd.ttlm_info = ttlm_info; 7368 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7369 &sdata->u.mgd.ttlm_work); 7370 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7371 &sdata->u.mgd.ttlm_work, 7372 us_to_ktime(delay_usec)); 7373 return; 7374 } 7375 } 7376 } 7377 7378 static void 7379 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7380 int reporting_link_id, 7381 struct ieee802_11_elems *elems) 7382 { 7383 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7384 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7385 const struct element *sub; 7386 const u8 *subelems; 7387 size_t subelems_len; 7388 u8 common_size; 7389 int link_id; 7390 7391 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7392 return; 7393 7394 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7395 subelems = (u8 *)elems->ml_basic + common_size; 7396 subelems_len = elems->ml_basic_len - common_size; 7397 7398 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7399 subelems, subelems_len) { 7400 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7401 struct ieee80211_link_data *link; 7402 ssize_t len; 7403 7404 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7405 sub->datalen)) 7406 continue; 7407 7408 link_id = le16_get_bits(prof->control, 7409 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7410 /* need a valid link ID, but also not our own, both AP bugs */ 7411 if (link_id == reporting_link_id || 7412 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7413 continue; 7414 7415 link = sdata_dereference(sdata->link[link_id], sdata); 7416 if (!link) 7417 continue; 7418 7419 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7420 NULL, 0, 7421 IEEE80211_MLE_SUBELEM_FRAGMENT); 7422 if (WARN_ON(len < 0)) 7423 continue; 7424 7425 sta_profiles[link_id] = sub; 7426 sta_profiles_len[link_id] = len; 7427 } 7428 7429 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7430 struct ieee80211_mle_per_sta_profile *prof; 7431 struct ieee802_11_elems *prof_elems; 7432 struct ieee80211_link_data *link; 7433 ssize_t len; 7434 7435 if (link_id == reporting_link_id) 7436 continue; 7437 7438 link = sdata_dereference(sdata->link[link_id], sdata); 7439 if (!link) 7440 continue; 7441 7442 if (!sta_profiles[link_id]) { 7443 prof_elems = NULL; 7444 goto handle; 7445 } 7446 7447 /* we can defragment in-place, won't use the buffer again */ 7448 len = cfg80211_defragment_element(sta_profiles[link_id], 7449 subelems, subelems_len, 7450 (void *)sta_profiles[link_id], 7451 sta_profiles_len[link_id], 7452 IEEE80211_MLE_SUBELEM_FRAGMENT); 7453 if (WARN_ON(len != sta_profiles_len[link_id])) 7454 continue; 7455 7456 prof = (void *)sta_profiles[link_id]; 7457 prof_elems = ieee802_11_parse_elems(prof->variable + 7458 (prof->sta_info_len - 1), 7459 len - 7460 (prof->sta_info_len - 1), 7461 IEEE80211_FTYPE_MGMT | 7462 IEEE80211_STYPE_BEACON, 7463 NULL); 7464 7465 /* memory allocation failed - let's hope that's transient */ 7466 if (!prof_elems) 7467 continue; 7468 7469 handle: 7470 /* 7471 * FIXME: the timings here are obviously incorrect, 7472 * but only older Intel drivers seem to care, and 7473 * those don't have MLO. If you really need this, 7474 * the problem is having to calculate it with the 7475 * TSF offset etc. The device_timestamp is still 7476 * correct, of course. 7477 */ 7478 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7479 IEEE80211_CSA_SOURCE_OTHER_LINK); 7480 kfree(prof_elems); 7481 } 7482 } 7483 7484 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7485 const struct ieee802_11_elems *elems) 7486 { 7487 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7488 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7489 7490 if (!elems->ssid) 7491 return false; 7492 7493 /* hidden SSID: zero length */ 7494 if (elems->ssid_len == 0) 7495 return false; 7496 7497 if (elems->ssid_len != cfg->ssid_len) 7498 return true; 7499 7500 /* hidden SSID: zeroed out */ 7501 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7502 return false; 7503 7504 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7505 } 7506 7507 static bool 7508 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7509 struct ieee80211_mgmt *mgmt, 7510 struct ieee80211_rx_status *rx_status, 7511 struct ieee80211_chanctx_conf *chanctx) 7512 { 7513 u32 pri_2mhz_khz; 7514 struct ieee80211_channel *s1g_sibling_1mhz; 7515 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7516 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7517 7518 if (rx_khz == pri_khz) 7519 return true; 7520 7521 if (!chanctx->def.s1g_primary_2mhz) 7522 return false; 7523 7524 /* 7525 * If we have an S1G interface with a 2MHz primary, beacons are 7526 * sent on the center frequency of the 2MHz primary. Find the sibling 7527 * 1MHz channel and calculate the 2MHz primary center frequency. 7528 */ 7529 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7530 &chanctx->def); 7531 if (!s1g_sibling_1mhz) 7532 return false; 7533 7534 pri_2mhz_khz = 7535 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7536 return rx_khz == pri_2mhz_khz; 7537 } 7538 7539 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7540 struct ieee80211_hdr *hdr, size_t len, 7541 struct ieee80211_rx_status *rx_status) 7542 { 7543 struct ieee80211_sub_if_data *sdata = link->sdata; 7544 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7545 struct ieee80211_bss_conf *bss_conf = link->conf; 7546 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7547 struct ieee80211_mgmt *mgmt = (void *) hdr; 7548 struct ieee80211_ext *ext = NULL; 7549 size_t baselen; 7550 struct ieee802_11_elems *elems; 7551 struct ieee80211_local *local = sdata->local; 7552 struct ieee80211_chanctx_conf *chanctx_conf; 7553 struct ieee80211_supported_band *sband; 7554 struct ieee80211_channel *chan; 7555 struct link_sta_info *link_sta; 7556 struct sta_info *sta; 7557 u64 changed = 0; 7558 bool erp_valid; 7559 u8 erp_value = 0; 7560 u32 ncrc = 0; 7561 u8 *bssid, *variable = mgmt->u.beacon.variable; 7562 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7563 struct ieee80211_elems_parse_params parse_params = { 7564 .mode = link->u.mgd.conn.mode, 7565 .link_id = -1, 7566 .from_ap = true, 7567 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7568 }; 7569 7570 lockdep_assert_wiphy(local->hw.wiphy); 7571 7572 /* Process beacon from the current BSS */ 7573 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7574 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7575 ext = (void *)mgmt; 7576 variable = ext->u.s1g_beacon.variable + 7577 ieee80211_s1g_optional_len(ext->frame_control); 7578 } 7579 7580 baselen = (u8 *) variable - (u8 *) mgmt; 7581 if (baselen > len) 7582 return; 7583 7584 parse_params.start = variable; 7585 parse_params.len = len - baselen; 7586 7587 rcu_read_lock(); 7588 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7589 if (!chanctx_conf) { 7590 rcu_read_unlock(); 7591 return; 7592 } 7593 7594 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7595 chanctx_conf)) { 7596 rcu_read_unlock(); 7597 return; 7598 } 7599 chan = chanctx_conf->def.chan; 7600 rcu_read_unlock(); 7601 7602 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7603 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7604 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7605 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7606 elems = ieee802_11_parse_elems_full(&parse_params); 7607 if (!elems) 7608 return; 7609 7610 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7611 7612 if (elems->dtim_period) 7613 link->u.mgd.dtim_period = elems->dtim_period; 7614 link->u.mgd.have_beacon = true; 7615 ifmgd->assoc_data->need_beacon = false; 7616 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7617 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7618 bss_conf->sync_tsf = 7619 le64_to_cpu(mgmt->u.beacon.timestamp); 7620 bss_conf->sync_device_ts = 7621 rx_status->device_timestamp; 7622 bss_conf->sync_dtim_count = elems->dtim_count; 7623 } 7624 7625 if (elems->mbssid_config_ie) 7626 bss_conf->profile_periodicity = 7627 elems->mbssid_config_ie->profile_periodicity; 7628 else 7629 bss_conf->profile_periodicity = 0; 7630 7631 if (elems->ext_capab_len >= 11 && 7632 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7633 bss_conf->ema_ap = true; 7634 else 7635 bss_conf->ema_ap = false; 7636 7637 /* continue assoc process */ 7638 ifmgd->assoc_data->timeout = jiffies; 7639 ifmgd->assoc_data->timeout_started = true; 7640 run_again(sdata, ifmgd->assoc_data->timeout); 7641 kfree(elems); 7642 return; 7643 } 7644 7645 if (!ifmgd->associated || 7646 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7647 return; 7648 bssid = link->u.mgd.bssid; 7649 7650 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7651 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7652 local, rx_status); 7653 7654 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7655 mlme_dbg_ratelimited(sdata, 7656 "cancelling AP probe due to a received beacon\n"); 7657 ieee80211_reset_ap_probe(sdata); 7658 } 7659 7660 /* 7661 * Push the beacon loss detection into the future since 7662 * we are processing a beacon from the AP just now. 7663 */ 7664 ieee80211_sta_reset_beacon_monitor(sdata); 7665 7666 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7667 * element (which carries the beacon interval). Don't forget to add a 7668 * bit to care_about_ies[] above if mac80211 is interested in a 7669 * changing S1G element. 7670 */ 7671 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7672 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7673 parse_params.bss = bss_conf->bss; 7674 parse_params.filter = care_about_ies; 7675 parse_params.crc = ncrc; 7676 elems = ieee802_11_parse_elems_full(&parse_params); 7677 if (!elems) 7678 return; 7679 7680 if (rx_status->flag & RX_FLAG_DECRYPTED && 7681 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7682 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7683 sdata->vif.cfg.ap_addr); 7684 __ieee80211_disconnect(sdata); 7685 return; 7686 } 7687 7688 ncrc = elems->crc; 7689 7690 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7691 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7692 vif_cfg->s1g)) { 7693 if (local->hw.conf.dynamic_ps_timeout > 0) { 7694 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7695 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7696 ieee80211_hw_config(local, -1, 7697 IEEE80211_CONF_CHANGE_PS); 7698 } 7699 ieee80211_send_nullfunc(local, sdata, false); 7700 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7701 local->pspolling = true; 7702 7703 /* 7704 * Here is assumed that the driver will be 7705 * able to send ps-poll frame and receive a 7706 * response even though power save mode is 7707 * enabled, but some drivers might require 7708 * to disable power save here. This needs 7709 * to be investigated. 7710 */ 7711 ieee80211_send_pspoll(local, sdata); 7712 } 7713 } 7714 7715 if (sdata->vif.p2p || 7716 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7717 struct ieee80211_p2p_noa_attr noa = {}; 7718 int ret; 7719 7720 ret = cfg80211_get_p2p_attr(variable, 7721 len - baselen, 7722 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7723 (u8 *) &noa, sizeof(noa)); 7724 if (ret >= 2) { 7725 if (link->u.mgd.p2p_noa_index != noa.index) { 7726 /* valid noa_attr and index changed */ 7727 link->u.mgd.p2p_noa_index = noa.index; 7728 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7729 changed |= BSS_CHANGED_P2P_PS; 7730 /* 7731 * make sure we update all information, the CRC 7732 * mechanism doesn't look at P2P attributes. 7733 */ 7734 link->u.mgd.beacon_crc_valid = false; 7735 } 7736 } else if (link->u.mgd.p2p_noa_index != -1) { 7737 /* noa_attr not found and we had valid noa_attr before */ 7738 link->u.mgd.p2p_noa_index = -1; 7739 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7740 changed |= BSS_CHANGED_P2P_PS; 7741 link->u.mgd.beacon_crc_valid = false; 7742 } 7743 } 7744 7745 /* 7746 * Update beacon timing and dtim count on every beacon appearance. This 7747 * will allow the driver to use the most updated values. Do it before 7748 * comparing this one with last received beacon. 7749 * IMPORTANT: These parameters would possibly be out of sync by the time 7750 * the driver will use them. The synchronized view is currently 7751 * guaranteed only in certain callbacks. 7752 */ 7753 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7754 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7755 bss_conf->sync_tsf = 7756 le64_to_cpu(mgmt->u.beacon.timestamp); 7757 bss_conf->sync_device_ts = 7758 rx_status->device_timestamp; 7759 bss_conf->sync_dtim_count = elems->dtim_count; 7760 } 7761 7762 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7763 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7764 parse_params.start, 7765 parse_params.len))) 7766 goto free; 7767 link->u.mgd.beacon_crc = ncrc; 7768 link->u.mgd.beacon_crc_valid = true; 7769 7770 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7771 7772 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7773 rx_status->device_timestamp, 7774 elems, elems, 7775 IEEE80211_CSA_SOURCE_BEACON); 7776 7777 /* note that after this elems->ml_basic can no longer be used fully */ 7778 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7779 7780 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7781 7782 if (!sdata->u.mgd.epcs.enabled && 7783 !link->u.mgd.disable_wmm_tracking && 7784 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7785 elems->wmm_param_len, 7786 elems->mu_edca_param_set)) 7787 changed |= BSS_CHANGED_QOS; 7788 7789 /* 7790 * If we haven't had a beacon before, tell the driver about the 7791 * DTIM period (and beacon timing if desired) now. 7792 */ 7793 if (!link->u.mgd.have_beacon) { 7794 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7795 bss_conf->dtim_period = elems->dtim_period ?: 1; 7796 7797 changed |= BSS_CHANGED_BEACON_INFO; 7798 link->u.mgd.have_beacon = true; 7799 7800 ieee80211_recalc_ps(local); 7801 7802 ieee80211_recalc_ps_vif(sdata); 7803 } 7804 7805 if (elems->erp_info) { 7806 erp_valid = true; 7807 erp_value = elems->erp_info[0]; 7808 } else { 7809 erp_valid = false; 7810 } 7811 7812 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7813 changed |= ieee80211_handle_bss_capability(link, 7814 le16_to_cpu(mgmt->u.beacon.capab_info), 7815 erp_valid, erp_value); 7816 7817 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7818 if (WARN_ON(!sta)) { 7819 goto free; 7820 } 7821 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7822 lockdep_is_held(&local->hw.wiphy->mtx)); 7823 if (WARN_ON(!link_sta)) { 7824 goto free; 7825 } 7826 7827 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7828 goto free; 7829 7830 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7831 7832 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7833 7834 if (ieee80211_config_bw(link, elems, true, &changed, 7835 IEEE80211_STYPE_BEACON)) { 7836 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7837 WLAN_REASON_DEAUTH_LEAVING, 7838 true, deauth_buf); 7839 ieee80211_report_disconnect(sdata, deauth_buf, 7840 sizeof(deauth_buf), true, 7841 WLAN_REASON_DEAUTH_LEAVING, 7842 false); 7843 goto free; 7844 } 7845 7846 if (elems->opmode_notif) 7847 ieee80211_vht_handle_opmode(sdata, link_sta, 7848 *elems->opmode_notif, 7849 rx_status->band); 7850 7851 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7852 elems->country_elem, 7853 elems->country_elem_len, 7854 elems->pwr_constr_elem, 7855 elems->cisco_dtpc_elem); 7856 7857 ieee80211_ml_reconfiguration(sdata, elems); 7858 ieee80211_process_adv_ttlm(sdata, elems, 7859 le64_to_cpu(mgmt->u.beacon.timestamp)); 7860 7861 ieee80211_link_info_change_notify(sdata, link, changed); 7862 free: 7863 kfree(elems); 7864 } 7865 7866 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7867 struct ieee80211_neg_ttlm neg_ttlm) 7868 { 7869 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7870 u8 i; 7871 7872 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7873 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7874 7875 /* If there is an active TTLM, unset previously suspended links */ 7876 if (sdata->vif.neg_ttlm.valid) 7877 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7878 7879 /* exclude links that are already disabled by advertised TTLM */ 7880 new_active_links = 7881 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7882 new_suspended_links = 7883 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7884 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7885 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7886 new_dormant_links, new_suspended_links)) 7887 return; 7888 7889 sdata->vif.neg_ttlm = neg_ttlm; 7890 sdata->vif.neg_ttlm.valid = true; 7891 } 7892 7893 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7894 struct wiphy_work *work) 7895 { 7896 struct ieee80211_sub_if_data *sdata = 7897 container_of(work, struct ieee80211_sub_if_data, 7898 u.mgd.neg_ttlm_timeout_work.work); 7899 7900 sdata_info(sdata, 7901 "No negotiated TTLM response from AP, disconnecting.\n"); 7902 7903 __ieee80211_disconnect(sdata); 7904 } 7905 7906 static void 7907 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7908 struct ieee80211_neg_ttlm *neg_ttlm) 7909 { 7910 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7911 7912 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7913 sizeof(neg_ttlm->downlink))) { 7914 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7915 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7916 } else { 7917 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7918 } 7919 7920 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7921 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7922 __le16 map; 7923 7924 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7925 7926 pos = skb_put(skb, len + 2); 7927 *pos++ = WLAN_EID_EXTENSION; 7928 len_pos = pos++; 7929 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7930 *pos++ = direction[i]; 7931 map_ind_pos = pos++; 7932 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7933 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7934 cpu_to_le16(neg_ttlm->uplink[tid]) : 7935 cpu_to_le16(neg_ttlm->downlink[tid]); 7936 if (!map) 7937 continue; 7938 7939 len += 2; 7940 map_ind |= BIT(tid); 7941 skb_put_data(skb, &map, sizeof(map)); 7942 } 7943 7944 *map_ind_pos = map_ind; 7945 *len_pos = len; 7946 7947 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7948 break; 7949 } 7950 } 7951 7952 static void 7953 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7954 struct ieee80211_neg_ttlm *neg_ttlm, 7955 u8 dialog_token) 7956 { 7957 struct ieee80211_local *local = sdata->local; 7958 struct ieee80211_mgmt *mgmt; 7959 struct sk_buff *skb; 7960 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7961 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7962 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7963 7964 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7965 if (!skb) 7966 return; 7967 7968 skb_reserve(skb, local->tx_headroom); 7969 mgmt = skb_put_zero(skb, hdr_len); 7970 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7971 IEEE80211_STYPE_ACTION); 7972 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7973 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7974 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7975 7976 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7977 mgmt->u.action.u.ttlm_req.action_code = 7978 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7979 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7980 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7981 ieee80211_tx_skb(sdata, skb); 7982 } 7983 7984 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7985 struct cfg80211_ttlm_params *params) 7986 { 7987 struct ieee80211_neg_ttlm neg_ttlm = {}; 7988 u8 i; 7989 7990 if (!ieee80211_vif_is_mld(&sdata->vif) || 7991 !(sdata->vif.cfg.mld_capa_op & 7992 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7993 return -EINVAL; 7994 7995 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7996 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7997 (params->ulink[i] & ~sdata->vif.valid_links)) 7998 return -EINVAL; 7999 8000 neg_ttlm.downlink[i] = params->dlink[i]; 8001 neg_ttlm.uplink[i] = params->ulink[i]; 8002 } 8003 8004 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 8005 NEG_TTLM_RES_ACCEPT) 8006 return -EINVAL; 8007 8008 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8009 sdata->u.mgd.dialog_token_alloc++; 8010 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 8011 sdata->u.mgd.dialog_token_alloc); 8012 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8013 &sdata->u.mgd.neg_ttlm_timeout_work); 8014 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 8015 &sdata->u.mgd.neg_ttlm_timeout_work, 8016 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 8017 return 0; 8018 } 8019 8020 static void 8021 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8022 enum ieee80211_neg_ttlm_res ttlm_res, 8023 u8 dialog_token, 8024 struct ieee80211_neg_ttlm *neg_ttlm) 8025 { 8026 struct ieee80211_local *local = sdata->local; 8027 struct ieee80211_mgmt *mgmt; 8028 struct sk_buff *skb; 8029 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 8030 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 8031 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 8032 u16 status_code; 8033 8034 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 8035 if (!skb) 8036 return; 8037 8038 skb_reserve(skb, local->tx_headroom); 8039 mgmt = skb_put_zero(skb, hdr_len); 8040 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8041 IEEE80211_STYPE_ACTION); 8042 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8043 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8044 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8045 8046 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8047 mgmt->u.action.u.ttlm_res.action_code = 8048 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 8049 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 8050 switch (ttlm_res) { 8051 default: 8052 WARN_ON(1); 8053 fallthrough; 8054 case NEG_TTLM_RES_REJECT: 8055 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 8056 break; 8057 case NEG_TTLM_RES_ACCEPT: 8058 status_code = WLAN_STATUS_SUCCESS; 8059 break; 8060 case NEG_TTLM_RES_SUGGEST_PREFERRED: 8061 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 8062 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 8063 break; 8064 } 8065 8066 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 8067 ieee80211_tx_skb(sdata, skb); 8068 } 8069 8070 static int 8071 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 8072 const struct ieee80211_ttlm_elem *ttlm, 8073 struct ieee80211_neg_ttlm *neg_ttlm, 8074 u8 *direction) 8075 { 8076 u8 control, link_map_presence, map_size, tid; 8077 u8 *pos; 8078 8079 /* The element size was already validated in 8080 * ieee80211_tid_to_link_map_size_ok() 8081 */ 8082 pos = (void *)ttlm->optional; 8083 8084 control = ttlm->control; 8085 8086 /* mapping switch time and expected duration fields are not expected 8087 * in case of negotiated TTLM 8088 */ 8089 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 8090 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 8091 mlme_dbg(sdata, 8092 "Invalid TTLM element in negotiated TTLM request\n"); 8093 return -EINVAL; 8094 } 8095 8096 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 8097 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8098 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 8099 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 8100 } 8101 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 8102 return 0; 8103 } 8104 8105 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 8106 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 8107 *direction != IEEE80211_TTLM_DIRECTION_UP && 8108 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 8109 return -EINVAL; 8110 8111 link_map_presence = *pos; 8112 pos++; 8113 8114 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 8115 map_size = 1; 8116 else 8117 map_size = 2; 8118 8119 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 8120 u16 map; 8121 8122 if (link_map_presence & BIT(tid)) { 8123 map = ieee80211_get_ttlm(map_size, pos); 8124 if (!map) { 8125 mlme_dbg(sdata, 8126 "No active links for TID %d", tid); 8127 return -EINVAL; 8128 } 8129 } else { 8130 map = 0; 8131 } 8132 8133 switch (*direction) { 8134 case IEEE80211_TTLM_DIRECTION_BOTH: 8135 neg_ttlm->downlink[tid] = map; 8136 neg_ttlm->uplink[tid] = map; 8137 break; 8138 case IEEE80211_TTLM_DIRECTION_DOWN: 8139 neg_ttlm->downlink[tid] = map; 8140 break; 8141 case IEEE80211_TTLM_DIRECTION_UP: 8142 neg_ttlm->uplink[tid] = map; 8143 break; 8144 default: 8145 return -EINVAL; 8146 } 8147 pos += map_size; 8148 } 8149 return 0; 8150 } 8151 8152 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 8153 struct ieee80211_mgmt *mgmt, size_t len) 8154 { 8155 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 8156 size_t ies_len; 8157 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 8158 struct ieee802_11_elems *elems = NULL; 8159 struct ieee80211_neg_ttlm neg_ttlm = {}; 8160 8161 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 8162 8163 if (!ieee80211_vif_is_mld(&sdata->vif)) 8164 return; 8165 8166 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 8167 ies_len = len - offsetof(struct ieee80211_mgmt, 8168 u.action.u.ttlm_req.variable); 8169 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 8170 ies_len, 8171 IEEE80211_FTYPE_MGMT | 8172 IEEE80211_STYPE_ACTION, 8173 NULL); 8174 if (!elems) { 8175 ttlm_res = NEG_TTLM_RES_REJECT; 8176 goto out; 8177 } 8178 8179 for (i = 0; i < elems->ttlm_num; i++) { 8180 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 8181 &neg_ttlm, &direction[i]) || 8182 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 8183 elems->ttlm_num != 1)) { 8184 ttlm_res = NEG_TTLM_RES_REJECT; 8185 goto out; 8186 } 8187 } 8188 8189 if (!elems->ttlm_num || 8190 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 8191 ttlm_res = NEG_TTLM_RES_REJECT; 8192 goto out; 8193 } 8194 8195 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 8196 if ((neg_ttlm.downlink[i] && 8197 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 8198 (neg_ttlm.uplink[i] && 8199 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 8200 ttlm_res = NEG_TTLM_RES_REJECT; 8201 goto out; 8202 } 8203 } 8204 8205 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8206 8207 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8208 goto out; 8209 8210 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8211 out: 8212 kfree(elems); 8213 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8214 } 8215 8216 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8217 struct ieee80211_mgmt *mgmt, size_t len) 8218 { 8219 if (!ieee80211_vif_is_mld(&sdata->vif) || 8220 mgmt->u.action.u.ttlm_req.dialog_token != 8221 sdata->u.mgd.dialog_token_alloc) 8222 return; 8223 8224 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8225 &sdata->u.mgd.neg_ttlm_timeout_work); 8226 8227 /* MLD station sends a TID to link mapping request, mainly to handle 8228 * BTM (BSS transition management) request, in which case it needs to 8229 * restrict the active links set. 8230 * In this case it's not expected that the MLD AP will reject the 8231 * negotiated TTLM request. 8232 * This can be better implemented in the future, to handle request 8233 * rejections. 8234 */ 8235 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8236 __ieee80211_disconnect(sdata); 8237 } 8238 8239 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8240 { 8241 u16 new_dormant_links; 8242 8243 if (!sdata->vif.neg_ttlm.valid) 8244 return; 8245 8246 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8247 new_dormant_links = 8248 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8249 sdata->vif.suspended_links = 0; 8250 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8251 new_dormant_links); 8252 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8253 BSS_CHANGED_MLD_VALID_LINKS); 8254 } 8255 8256 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8257 struct wiphy_work *work) 8258 { 8259 struct ieee80211_sub_if_data *sdata = 8260 container_of(work, struct ieee80211_sub_if_data, 8261 u.mgd.teardown_ttlm_work); 8262 8263 ieee80211_process_ttlm_teardown(sdata); 8264 } 8265 8266 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8267 { 8268 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8269 struct ieee80211_local *local = sdata->local; 8270 struct ieee80211_mgmt *mgmt; 8271 struct sk_buff *skb; 8272 int frame_len = offsetofend(struct ieee80211_mgmt, 8273 u.action.u.ttlm_tear_down); 8274 struct ieee80211_tx_info *info; 8275 8276 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8277 if (!skb) 8278 return; 8279 8280 skb_reserve(skb, local->hw.extra_tx_headroom); 8281 mgmt = skb_put_zero(skb, frame_len); 8282 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8283 IEEE80211_STYPE_ACTION); 8284 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8285 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8286 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8287 8288 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8289 mgmt->u.action.u.ttlm_tear_down.action_code = 8290 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8291 8292 info = IEEE80211_SKB_CB(skb); 8293 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8294 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8295 ieee80211_tx_skb(sdata, skb); 8296 } 8297 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8298 8299 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8300 struct sk_buff *skb) 8301 { 8302 struct ieee80211_link_data *link = &sdata->deflink; 8303 struct ieee80211_rx_status *rx_status; 8304 struct ieee80211_hdr *hdr; 8305 u16 fc; 8306 8307 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8308 8309 rx_status = (struct ieee80211_rx_status *) skb->cb; 8310 hdr = (struct ieee80211_hdr *) skb->data; 8311 fc = le16_to_cpu(hdr->frame_control); 8312 8313 switch (fc & IEEE80211_FCTL_STYPE) { 8314 case IEEE80211_STYPE_S1G_BEACON: 8315 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8316 break; 8317 } 8318 } 8319 8320 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8321 struct sk_buff *skb) 8322 { 8323 struct ieee80211_link_data *link = &sdata->deflink; 8324 struct ieee80211_rx_status *rx_status; 8325 struct ieee802_11_elems *elems; 8326 struct ieee80211_mgmt *mgmt; 8327 u16 fc; 8328 int ies_len; 8329 8330 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8331 8332 rx_status = (struct ieee80211_rx_status *) skb->cb; 8333 mgmt = (struct ieee80211_mgmt *) skb->data; 8334 fc = le16_to_cpu(mgmt->frame_control); 8335 8336 if (rx_status->link_valid) { 8337 link = sdata_dereference(sdata->link[rx_status->link_id], 8338 sdata); 8339 if (!link) 8340 return; 8341 } 8342 8343 switch (fc & IEEE80211_FCTL_STYPE) { 8344 case IEEE80211_STYPE_BEACON: 8345 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8346 skb->len, rx_status); 8347 break; 8348 case IEEE80211_STYPE_PROBE_RESP: 8349 ieee80211_rx_mgmt_probe_resp(link, skb); 8350 break; 8351 case IEEE80211_STYPE_AUTH: 8352 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8353 break; 8354 case IEEE80211_STYPE_DEAUTH: 8355 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8356 break; 8357 case IEEE80211_STYPE_DISASSOC: 8358 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8359 break; 8360 case IEEE80211_STYPE_ASSOC_RESP: 8361 case IEEE80211_STYPE_REASSOC_RESP: 8362 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8363 break; 8364 case IEEE80211_STYPE_ACTION: 8365 if (!sdata->u.mgd.associated || 8366 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8367 break; 8368 8369 switch (mgmt->u.action.category) { 8370 case WLAN_CATEGORY_SPECTRUM_MGMT: 8371 ies_len = skb->len - 8372 offsetof(struct ieee80211_mgmt, 8373 u.action.u.chan_switch.variable); 8374 8375 if (ies_len < 0) 8376 break; 8377 8378 /* CSA IE cannot be overridden, no need for BSSID */ 8379 elems = ieee802_11_parse_elems(mgmt->u.action.u.chan_switch.variable, 8380 ies_len, 8381 IEEE80211_FTYPE_MGMT | 8382 IEEE80211_STYPE_ACTION, 8383 NULL); 8384 8385 if (elems && !elems->parse_error) { 8386 enum ieee80211_csa_source src = 8387 IEEE80211_CSA_SOURCE_PROT_ACTION; 8388 8389 ieee80211_sta_process_chanswitch(link, 8390 rx_status->mactime, 8391 rx_status->device_timestamp, 8392 elems, elems, 8393 src); 8394 } 8395 kfree(elems); 8396 break; 8397 case WLAN_CATEGORY_PUBLIC: 8398 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8399 ies_len = skb->len - 8400 offsetof(struct ieee80211_mgmt, 8401 u.action.u.ext_chan_switch.variable); 8402 8403 if (ies_len < 0) 8404 break; 8405 8406 /* 8407 * extended CSA IE can't be overridden, no need for 8408 * BSSID 8409 */ 8410 elems = ieee802_11_parse_elems(mgmt->u.action.u.ext_chan_switch.variable, 8411 ies_len, 8412 IEEE80211_FTYPE_MGMT | 8413 IEEE80211_STYPE_ACTION, 8414 NULL); 8415 8416 if (elems && !elems->parse_error) { 8417 enum ieee80211_csa_source src; 8418 8419 if (mgmt->u.action.category == 8420 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8421 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8422 else 8423 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8424 8425 /* for the handling code pretend it was an IE */ 8426 elems->ext_chansw_ie = 8427 &mgmt->u.action.u.ext_chan_switch.data; 8428 8429 ieee80211_sta_process_chanswitch(link, 8430 rx_status->mactime, 8431 rx_status->device_timestamp, 8432 elems, elems, 8433 src); 8434 } 8435 8436 kfree(elems); 8437 break; 8438 } 8439 break; 8440 } 8441 } 8442 8443 static void ieee80211_sta_timer(struct timer_list *t) 8444 { 8445 struct ieee80211_sub_if_data *sdata = 8446 timer_container_of(sdata, t, u.mgd.timer); 8447 8448 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8449 } 8450 8451 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8452 u8 reason, bool tx) 8453 { 8454 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8455 8456 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8457 tx, frame_buf); 8458 8459 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8460 reason, false); 8461 } 8462 8463 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8464 { 8465 struct ieee80211_local *local = sdata->local; 8466 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8467 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8468 u32 tx_flags = 0; 8469 u16 trans = 1; 8470 u16 status = 0; 8471 struct ieee80211_prep_tx_info info = { 8472 .subtype = IEEE80211_STYPE_AUTH, 8473 }; 8474 8475 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8476 8477 if (WARN_ON_ONCE(!auth_data)) 8478 return -EINVAL; 8479 8480 if (auth_data->algorithm == WLAN_AUTH_EPPKE && 8481 ieee80211_vif_is_mld(&sdata->vif) && 8482 !cfg80211_find_ext_elem(WLAN_EID_EXT_EHT_MULTI_LINK, 8483 auth_data->data, auth_data->data_len)) 8484 return -EINVAL; 8485 8486 auth_data->tries++; 8487 8488 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8489 sdata_info(sdata, "authentication with %pM timed out\n", 8490 auth_data->ap_addr); 8491 8492 /* 8493 * Most likely AP is not in the range so remove the 8494 * bss struct for that AP. 8495 */ 8496 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8497 8498 return -ETIMEDOUT; 8499 } 8500 8501 if (auth_data->algorithm == WLAN_AUTH_SAE || 8502 auth_data->algorithm == WLAN_AUTH_EPPKE) 8503 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8504 8505 info.link_id = auth_data->link_id; 8506 drv_mgd_prepare_tx(local, sdata, &info); 8507 8508 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8509 auth_data->ap_addr, auth_data->tries, 8510 IEEE80211_AUTH_MAX_TRIES); 8511 8512 auth_data->expected_transaction = 2; 8513 8514 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8515 trans = auth_data->trans; 8516 status = auth_data->status; 8517 auth_data->expected_transaction = trans; 8518 } else if (auth_data->algorithm == WLAN_AUTH_EPPKE) { 8519 trans = auth_data->trans; 8520 status = auth_data->status; 8521 } else if (auth_data->algorithm == WLAN_AUTH_IEEE8021X) { 8522 trans = auth_data->trans; 8523 status = auth_data->status; 8524 auth_data->expected_transaction = trans + 1; 8525 } 8526 8527 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8528 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8529 IEEE80211_TX_INTFL_MLME_CONN_TX; 8530 8531 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8532 auth_data->data, auth_data->data_len, 8533 auth_data->ap_addr, auth_data->ap_addr, 8534 NULL, 0, 0, tx_flags); 8535 8536 if (tx_flags == 0) { 8537 if (auth_data->algorithm == WLAN_AUTH_SAE) 8538 auth_data->timeout = jiffies + 8539 IEEE80211_AUTH_TIMEOUT_SAE; 8540 else 8541 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8542 } else { 8543 auth_data->timeout = 8544 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8545 } 8546 8547 auth_data->timeout_started = true; 8548 run_again(sdata, auth_data->timeout); 8549 8550 return 0; 8551 } 8552 8553 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8554 { 8555 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8556 struct ieee80211_local *local = sdata->local; 8557 int ret; 8558 8559 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8560 8561 assoc_data->tries++; 8562 assoc_data->comeback = false; 8563 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8564 sdata_info(sdata, "association with %pM timed out\n", 8565 assoc_data->ap_addr); 8566 8567 /* 8568 * Most likely AP is not in the range so remove the 8569 * bss struct for that AP. 8570 */ 8571 cfg80211_unlink_bss(local->hw.wiphy, 8572 assoc_data->link[assoc_data->assoc_link_id].bss); 8573 8574 return -ETIMEDOUT; 8575 } 8576 8577 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8578 assoc_data->ap_addr, assoc_data->tries, 8579 IEEE80211_ASSOC_MAX_TRIES); 8580 ret = ieee80211_send_assoc(sdata); 8581 if (ret) 8582 return ret; 8583 8584 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8585 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8586 assoc_data->timeout_started = true; 8587 run_again(sdata, assoc_data->timeout); 8588 } else { 8589 assoc_data->timeout = 8590 round_jiffies_up(jiffies + 8591 IEEE80211_ASSOC_TIMEOUT_LONG); 8592 assoc_data->timeout_started = true; 8593 run_again(sdata, assoc_data->timeout); 8594 } 8595 8596 return 0; 8597 } 8598 8599 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8600 __le16 fc, bool acked) 8601 { 8602 struct ieee80211_local *local = sdata->local; 8603 8604 sdata->u.mgd.status_fc = fc; 8605 sdata->u.mgd.status_acked = acked; 8606 sdata->u.mgd.status_received = true; 8607 8608 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8609 } 8610 8611 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8612 { 8613 struct ieee80211_local *local = sdata->local; 8614 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8615 8616 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8617 8618 if (ifmgd->status_received) { 8619 __le16 fc = ifmgd->status_fc; 8620 bool status_acked = ifmgd->status_acked; 8621 8622 ifmgd->status_received = false; 8623 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8624 if (status_acked) { 8625 if (ifmgd->auth_data->algorithm == 8626 WLAN_AUTH_SAE) 8627 ifmgd->auth_data->timeout = 8628 jiffies + 8629 IEEE80211_AUTH_TIMEOUT_SAE; 8630 else 8631 ifmgd->auth_data->timeout = 8632 jiffies + 8633 IEEE80211_AUTH_TIMEOUT_SHORT; 8634 run_again(sdata, ifmgd->auth_data->timeout); 8635 } else { 8636 ifmgd->auth_data->timeout = jiffies - 1; 8637 } 8638 ifmgd->auth_data->timeout_started = true; 8639 } else if (ifmgd->assoc_data && 8640 !ifmgd->assoc_data->comeback && 8641 (ieee80211_is_assoc_req(fc) || 8642 ieee80211_is_reassoc_req(fc))) { 8643 /* 8644 * Update association timeout based on the TX status 8645 * for the (Re)Association Request frame. Skip this if 8646 * we have already processed a (Re)Association Response 8647 * frame that indicated need for association comeback 8648 * at a specific time in the future. This could happen 8649 * if the TX status information is delayed enough for 8650 * the response to be received and processed first. 8651 */ 8652 if (status_acked) { 8653 ifmgd->assoc_data->timeout = 8654 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8655 run_again(sdata, ifmgd->assoc_data->timeout); 8656 } else { 8657 ifmgd->assoc_data->timeout = jiffies - 1; 8658 } 8659 ifmgd->assoc_data->timeout_started = true; 8660 } 8661 } 8662 8663 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8664 time_after(jiffies, ifmgd->auth_data->timeout)) { 8665 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8666 /* 8667 * ok ... we waited for assoc or continuation but 8668 * userspace didn't do it, so kill the auth data 8669 */ 8670 ieee80211_destroy_auth_data(sdata, false); 8671 } else if (ieee80211_auth(sdata)) { 8672 u8 ap_addr[ETH_ALEN]; 8673 struct ieee80211_event event = { 8674 .type = MLME_EVENT, 8675 .u.mlme.data = AUTH_EVENT, 8676 .u.mlme.status = MLME_TIMEOUT, 8677 }; 8678 8679 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8680 8681 ieee80211_destroy_auth_data(sdata, false); 8682 8683 cfg80211_auth_timeout(sdata->dev, ap_addr); 8684 drv_event_callback(sdata->local, sdata, &event); 8685 } 8686 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8687 run_again(sdata, ifmgd->auth_data->timeout); 8688 8689 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8690 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8691 if ((ifmgd->assoc_data->need_beacon && 8692 !sdata->deflink.u.mgd.have_beacon) || 8693 ieee80211_do_assoc(sdata)) { 8694 struct ieee80211_event event = { 8695 .type = MLME_EVENT, 8696 .u.mlme.data = ASSOC_EVENT, 8697 .u.mlme.status = MLME_TIMEOUT, 8698 }; 8699 8700 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8701 drv_event_callback(sdata->local, sdata, &event); 8702 } 8703 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8704 run_again(sdata, ifmgd->assoc_data->timeout); 8705 8706 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8707 ifmgd->associated) { 8708 u8 *bssid = sdata->deflink.u.mgd.bssid; 8709 int max_tries; 8710 8711 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8712 max_tries = max_nullfunc_tries; 8713 else 8714 max_tries = max_probe_tries; 8715 8716 /* ACK received for nullfunc probing frame */ 8717 if (!ifmgd->probe_send_count) 8718 ieee80211_reset_ap_probe(sdata); 8719 else if (ifmgd->nullfunc_failed) { 8720 if (ifmgd->probe_send_count < max_tries) { 8721 mlme_dbg(sdata, 8722 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8723 bssid, ifmgd->probe_send_count, 8724 max_tries); 8725 ieee80211_mgd_probe_ap_send(sdata); 8726 } else { 8727 mlme_dbg(sdata, 8728 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8729 bssid); 8730 ieee80211_sta_connection_lost(sdata, 8731 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8732 false); 8733 } 8734 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8735 run_again(sdata, ifmgd->probe_timeout); 8736 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8737 mlme_dbg(sdata, 8738 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8739 bssid, probe_wait_ms); 8740 ieee80211_sta_connection_lost(sdata, 8741 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8742 } else if (ifmgd->probe_send_count < max_tries) { 8743 mlme_dbg(sdata, 8744 "No probe response from AP %pM after %dms, try %d/%i\n", 8745 bssid, probe_wait_ms, 8746 ifmgd->probe_send_count, max_tries); 8747 ieee80211_mgd_probe_ap_send(sdata); 8748 } else { 8749 /* 8750 * We actually lost the connection ... or did we? 8751 * Let's make sure! 8752 */ 8753 mlme_dbg(sdata, 8754 "No probe response from AP %pM after %dms, disconnecting.\n", 8755 bssid, probe_wait_ms); 8756 8757 ieee80211_sta_connection_lost(sdata, 8758 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8759 } 8760 } 8761 } 8762 8763 static bool 8764 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8765 { 8766 /* 8767 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8768 * the links. 8769 */ 8770 struct ieee80211_link_data *link; 8771 8772 guard(rcu)(); 8773 8774 for_each_link_data_rcu(sdata, link) { 8775 if (!(link->conf->csa_active && 8776 !link->u.mgd.csa.waiting_bcn)) 8777 return false; 8778 } 8779 8780 return true; 8781 } 8782 8783 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8784 { 8785 struct ieee80211_sub_if_data *sdata = 8786 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8787 8788 if (ieee80211_is_csa_in_progress(sdata)) 8789 return; 8790 8791 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8792 return; 8793 8794 sdata->u.mgd.connection_loss = false; 8795 wiphy_work_queue(sdata->local->hw.wiphy, 8796 &sdata->u.mgd.beacon_connection_loss_work); 8797 } 8798 8799 static unsigned long 8800 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8801 { 8802 unsigned long latest_timeout = jiffies; 8803 unsigned int link_id; 8804 struct sta_info *sta; 8805 8806 guard(rcu)(); 8807 8808 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8809 if (!sta) 8810 return 0; 8811 8812 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8813 link_id++) { 8814 struct link_sta_info *link_sta; 8815 unsigned long timeout; 8816 8817 link_sta = rcu_dereference(sta->link[link_id]); 8818 if (!link_sta) 8819 continue; 8820 8821 timeout = link_sta->status_stats.last_ack; 8822 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8823 timeout = link_sta->rx_stats.last_rx; 8824 8825 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8826 8827 /* 8828 * latest_timeout holds the timeout of the link 8829 * that will expire last among all links in an 8830 * non-AP MLD STA. This ensures that the connection 8831 * monitor timer is only reset if at least one link 8832 * is still active, and it is scheduled to fire at 8833 * the latest possible timeout. 8834 */ 8835 if (time_after(timeout, latest_timeout)) 8836 latest_timeout = timeout; 8837 } 8838 8839 return latest_timeout; 8840 } 8841 8842 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8843 { 8844 struct ieee80211_sub_if_data *sdata = 8845 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8846 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8847 struct ieee80211_local *local = sdata->local; 8848 unsigned long latest_timeout; 8849 8850 if (ieee80211_is_csa_in_progress(sdata)) 8851 return; 8852 8853 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8854 8855 /* 8856 * If latest timeout is after now, then update timer to fire at 8857 * the later date, but do not actually probe at this time. 8858 */ 8859 if (time_is_after_jiffies(latest_timeout)) { 8860 mod_timer(&ifmgd->conn_mon_timer, 8861 round_jiffies_up(latest_timeout)); 8862 return; 8863 } 8864 8865 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8866 } 8867 8868 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8869 struct wiphy_work *work) 8870 { 8871 struct ieee80211_sub_if_data *sdata = 8872 container_of(work, struct ieee80211_sub_if_data, 8873 u.mgd.monitor_work); 8874 8875 ieee80211_mgd_probe_ap(sdata, false); 8876 } 8877 8878 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8879 { 8880 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8881 __ieee80211_stop_poll(sdata); 8882 8883 /* let's probe the connection once */ 8884 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8885 wiphy_work_queue(sdata->local->hw.wiphy, 8886 &sdata->u.mgd.monitor_work); 8887 } 8888 } 8889 8890 #ifdef CONFIG_PM 8891 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8892 { 8893 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8894 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8895 8896 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8897 8898 if (ifmgd->auth_data || ifmgd->assoc_data) { 8899 const u8 *ap_addr = ifmgd->auth_data ? 8900 ifmgd->auth_data->ap_addr : 8901 ifmgd->assoc_data->ap_addr; 8902 8903 /* 8904 * If we are trying to authenticate / associate while suspending, 8905 * cfg80211 won't know and won't actually abort those attempts, 8906 * thus we need to do that ourselves. 8907 */ 8908 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8909 IEEE80211_STYPE_DEAUTH, 8910 WLAN_REASON_DEAUTH_LEAVING, 8911 false, frame_buf); 8912 if (ifmgd->assoc_data) 8913 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8914 if (ifmgd->auth_data) 8915 ieee80211_destroy_auth_data(sdata, false); 8916 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8917 IEEE80211_DEAUTH_FRAME_LEN, 8918 false); 8919 } 8920 8921 /* This is a bit of a hack - we should find a better and more generic 8922 * solution to this. Normally when suspending, cfg80211 will in fact 8923 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8924 * auth (not so important) or assoc (this is the problem) process. 8925 * 8926 * As a consequence, it can happen that we are in the process of both 8927 * associating and suspending, and receive an association response 8928 * after cfg80211 has checked if it needs to disconnect, but before 8929 * we actually set the flag to drop incoming frames. This will then 8930 * cause the workqueue flush to process the association response in 8931 * the suspend, resulting in a successful association just before it 8932 * tries to remove the interface from the driver, which now though 8933 * has a channel context assigned ... this results in issues. 8934 * 8935 * To work around this (for now) simply deauth here again if we're 8936 * now connected. 8937 */ 8938 if (ifmgd->associated && !sdata->local->wowlan) { 8939 u8 bssid[ETH_ALEN]; 8940 struct cfg80211_deauth_request req = { 8941 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8942 .bssid = bssid, 8943 }; 8944 8945 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8946 ieee80211_mgd_deauth(sdata, &req); 8947 } 8948 } 8949 #endif 8950 8951 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8952 { 8953 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8954 8955 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8956 8957 if (!ifmgd->associated) 8958 return; 8959 8960 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8961 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8962 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8963 ieee80211_sta_connection_lost(sdata, 8964 WLAN_REASON_UNSPECIFIED, 8965 true); 8966 return; 8967 } 8968 8969 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8970 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8971 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8972 ieee80211_sta_connection_lost(sdata, 8973 WLAN_REASON_UNSPECIFIED, 8974 true); 8975 return; 8976 } 8977 } 8978 8979 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8980 struct wiphy_work *work) 8981 { 8982 struct ieee80211_link_data *link = 8983 container_of(work, struct ieee80211_link_data, 8984 u.mgd.request_smps_work); 8985 8986 __ieee80211_request_smps_mgd(link->sdata, link, 8987 link->u.mgd.driver_smps_mode); 8988 } 8989 8990 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8991 struct wiphy_work *work) 8992 { 8993 struct ieee80211_sub_if_data *sdata = 8994 container_of(work, struct ieee80211_sub_if_data, 8995 u.mgd.reconf.wk.work); 8996 8997 if (!sdata->u.mgd.reconf.added_links && 8998 !sdata->u.mgd.reconf.removed_links) 8999 return; 9000 9001 sdata_info(sdata, 9002 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 9003 sdata->u.mgd.reconf.added_links, 9004 sdata->u.mgd.reconf.removed_links); 9005 9006 __ieee80211_disconnect(sdata); 9007 } 9008 9009 /* interface setup */ 9010 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 9011 { 9012 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9013 9014 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 9015 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 9016 ieee80211_beacon_connection_loss_work); 9017 wiphy_work_init(&ifmgd->csa_connection_drop_work, 9018 ieee80211_csa_connection_drop_work); 9019 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 9020 ieee80211_tdls_peer_del_work); 9021 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 9022 ieee80211_ml_reconf_work); 9023 wiphy_delayed_work_init(&ifmgd->reconf.wk, 9024 ieee80211_ml_sta_reconf_timeout); 9025 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 9026 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 9027 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 9028 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 9029 ieee80211_sta_handle_tspec_ac_params_wk); 9030 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 9031 ieee80211_tid_to_link_map_work); 9032 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 9033 ieee80211_neg_ttlm_timeout_work); 9034 wiphy_work_init(&ifmgd->teardown_ttlm_work, 9035 ieee80211_teardown_ttlm_work); 9036 9037 ifmgd->flags = 0; 9038 ifmgd->powersave = sdata->wdev.ps; 9039 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 9040 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 9041 /* Setup TDLS data */ 9042 spin_lock_init(&ifmgd->teardown_lock); 9043 ifmgd->teardown_skb = NULL; 9044 ifmgd->orig_teardown_skb = NULL; 9045 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 9046 } 9047 9048 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 9049 struct wiphy_work *work) 9050 { 9051 struct ieee80211_link_data *link = 9052 container_of(work, struct ieee80211_link_data, 9053 u.mgd.recalc_smps); 9054 9055 ieee80211_recalc_smps(link->sdata, link); 9056 } 9057 9058 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 9059 { 9060 struct ieee80211_sub_if_data *sdata = link->sdata; 9061 struct ieee80211_local *local = sdata->local; 9062 unsigned int link_id = link->link_id; 9063 9064 link->u.mgd.p2p_noa_index = -1; 9065 link->conf->bssid = link->u.mgd.bssid; 9066 link->smps_mode = IEEE80211_SMPS_OFF; 9067 9068 wiphy_work_init(&link->u.mgd.request_smps_work, 9069 ieee80211_request_smps_mgd_work); 9070 wiphy_work_init(&link->u.mgd.recalc_smps, 9071 ieee80211_recalc_smps_work); 9072 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 9073 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 9074 else 9075 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 9076 9077 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 9078 ieee80211_csa_switch_work); 9079 9080 ieee80211_clear_tpe(&link->conf->tpe); 9081 9082 if (sdata->u.mgd.assoc_data) 9083 ether_addr_copy(link->conf->addr, 9084 sdata->u.mgd.assoc_data->link[link_id].addr); 9085 else if (sdata->u.mgd.reconf.add_links_data) 9086 ether_addr_copy(link->conf->addr, 9087 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 9088 else if (!is_valid_ether_addr(link->conf->addr)) 9089 eth_random_addr(link->conf->addr); 9090 } 9091 9092 /* scan finished notification */ 9093 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 9094 { 9095 struct ieee80211_sub_if_data *sdata; 9096 9097 /* Restart STA timers */ 9098 rcu_read_lock(); 9099 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 9100 if (ieee80211_sdata_running(sdata)) 9101 ieee80211_restart_sta_timer(sdata); 9102 } 9103 rcu_read_unlock(); 9104 } 9105 9106 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 9107 struct cfg80211_bss *cbss, s8 link_id, 9108 const u8 *ap_mld_addr, bool assoc, 9109 struct ieee80211_conn_settings *conn, 9110 bool override, 9111 unsigned long *userspace_selectors) 9112 { 9113 struct ieee80211_local *local = sdata->local; 9114 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9115 struct ieee80211_bss *bss = (void *)cbss->priv; 9116 struct sta_info *new_sta = NULL; 9117 struct ieee80211_link_data *link; 9118 bool have_sta = false; 9119 bool mlo; 9120 int err; 9121 u16 new_links; 9122 9123 if (link_id >= 0) { 9124 mlo = true; 9125 if (WARN_ON(!ap_mld_addr)) 9126 return -EINVAL; 9127 new_links = BIT(link_id); 9128 } else { 9129 if (WARN_ON(ap_mld_addr)) 9130 return -EINVAL; 9131 ap_mld_addr = cbss->bssid; 9132 new_links = 0; 9133 link_id = 0; 9134 mlo = false; 9135 } 9136 9137 if (assoc) { 9138 rcu_read_lock(); 9139 have_sta = sta_info_get(sdata, ap_mld_addr); 9140 rcu_read_unlock(); 9141 } 9142 9143 if (mlo && !have_sta && 9144 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 9145 return -EINVAL; 9146 9147 err = ieee80211_vif_set_links(sdata, new_links, 0); 9148 if (err) 9149 return err; 9150 9151 link = sdata_dereference(sdata->link[link_id], sdata); 9152 if (WARN_ON(!link)) { 9153 err = -ENOLINK; 9154 goto out_err; 9155 } 9156 9157 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 9158 err = -EINVAL; 9159 goto out_err; 9160 } 9161 9162 /* If a reconfig is happening, bail out */ 9163 if (local->in_reconfig) { 9164 err = -EBUSY; 9165 goto out_err; 9166 } 9167 9168 if (!have_sta) { 9169 if (mlo) 9170 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 9171 link_id, cbss->bssid, 9172 GFP_KERNEL); 9173 else 9174 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 9175 9176 if (!new_sta) { 9177 err = -ENOMEM; 9178 goto out_err; 9179 } 9180 9181 if (ifmgd->auth_data && 9182 (ifmgd->auth_data->algorithm == WLAN_AUTH_EPPKE || 9183 ifmgd->auth_data->algorithm == WLAN_AUTH_IEEE8021X)) 9184 new_sta->sta.epp_peer = true; 9185 9186 new_sta->sta.mlo = mlo; 9187 } 9188 9189 /* 9190 * Set up the information for the new channel before setting the 9191 * new channel. We can't - completely race-free - change the basic 9192 * rates bitmap and the channel (sband) that it refers to, but if 9193 * we set it up before we at least avoid calling into the driver's 9194 * bss_info_changed() method with invalid information (since we do 9195 * call that from changing the channel - only for IDLE and perhaps 9196 * some others, but ...). 9197 * 9198 * So to avoid that, just set up all the new information before the 9199 * channel, but tell the driver to apply it only afterwards, since 9200 * it might need the new channel for that. 9201 */ 9202 if (new_sta) { 9203 const struct cfg80211_bss_ies *ies; 9204 struct link_sta_info *link_sta; 9205 9206 rcu_read_lock(); 9207 link_sta = rcu_dereference(new_sta->link[link_id]); 9208 if (WARN_ON(!link_sta)) { 9209 rcu_read_unlock(); 9210 sta_info_free(local, new_sta); 9211 err = -EINVAL; 9212 goto out_err; 9213 } 9214 9215 err = ieee80211_mgd_setup_link_sta(link, new_sta, 9216 link_sta, cbss); 9217 if (err) { 9218 rcu_read_unlock(); 9219 sta_info_free(local, new_sta); 9220 goto out_err; 9221 } 9222 9223 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9224 9225 /* set timing information */ 9226 link->conf->beacon_int = cbss->beacon_interval; 9227 ies = rcu_dereference(cbss->beacon_ies); 9228 if (ies) { 9229 link->conf->sync_tsf = ies->tsf; 9230 link->conf->sync_device_ts = 9231 bss->device_ts_beacon; 9232 9233 ieee80211_get_dtim(ies, 9234 &link->conf->sync_dtim_count, 9235 NULL); 9236 } else if (!ieee80211_hw_check(&sdata->local->hw, 9237 TIMING_BEACON_ONLY)) { 9238 ies = rcu_dereference(cbss->proberesp_ies); 9239 /* must be non-NULL since beacon IEs were NULL */ 9240 link->conf->sync_tsf = ies->tsf; 9241 link->conf->sync_device_ts = 9242 bss->device_ts_presp; 9243 link->conf->sync_dtim_count = 0; 9244 } else { 9245 link->conf->sync_tsf = 0; 9246 link->conf->sync_device_ts = 0; 9247 link->conf->sync_dtim_count = 0; 9248 } 9249 rcu_read_unlock(); 9250 } 9251 9252 if (new_sta || override) { 9253 /* 9254 * Only set this if we're also going to calculate the AP 9255 * settings etc., otherwise this was set before in a 9256 * previous call. Note override is set to %true in assoc 9257 * if the settings were changed. 9258 */ 9259 link->u.mgd.conn = *conn; 9260 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9261 mlo, &link->u.mgd.conn, 9262 userspace_selectors); 9263 if (err) { 9264 if (new_sta) 9265 sta_info_free(local, new_sta); 9266 goto out_err; 9267 } 9268 /* pass out for use in assoc */ 9269 *conn = link->u.mgd.conn; 9270 } 9271 9272 if (new_sta) { 9273 /* 9274 * tell driver about BSSID, basic rates and timing 9275 * this was set up above, before setting the channel 9276 */ 9277 ieee80211_link_info_change_notify(sdata, link, 9278 BSS_CHANGED_BSSID | 9279 BSS_CHANGED_BASIC_RATES | 9280 BSS_CHANGED_BEACON_INT); 9281 9282 if (assoc) 9283 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9284 9285 err = sta_info_insert(new_sta); 9286 new_sta = NULL; 9287 if (err) { 9288 sdata_info(sdata, 9289 "failed to insert STA entry for the AP (error %d)\n", 9290 err); 9291 goto out_release_chan; 9292 } 9293 } else 9294 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9295 9296 /* Cancel scan to ensure that nothing interferes with connection */ 9297 if (local->scanning) 9298 ieee80211_scan_cancel(local); 9299 9300 return 0; 9301 9302 out_release_chan: 9303 ieee80211_link_release_channel(link); 9304 out_err: 9305 ieee80211_vif_set_links(sdata, 0, 0); 9306 return err; 9307 } 9308 9309 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9310 const struct cfg80211_bss_ies *ies, 9311 u8 cur_channel, bool ignore_ecsa) 9312 { 9313 const struct element *csa_elem, *ecsa_elem; 9314 struct ieee80211_channel_sw_ie *csa = NULL; 9315 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9316 9317 if (!ies) 9318 return false; 9319 9320 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9321 ies->data, ies->len); 9322 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9323 csa = (void *)csa_elem->data; 9324 9325 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9326 ies->data, ies->len); 9327 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9328 ecsa = (void *)ecsa_elem->data; 9329 9330 if (csa && csa->count == 0) 9331 csa = NULL; 9332 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9333 csa = NULL; 9334 9335 if (ecsa && ecsa->count == 0) 9336 ecsa = NULL; 9337 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9338 ecsa = NULL; 9339 9340 if (ignore_ecsa && ecsa) { 9341 sdata_info(sdata, 9342 "Ignoring ECSA in probe response - was considered stuck!\n"); 9343 return csa; 9344 } 9345 9346 return csa || ecsa; 9347 } 9348 9349 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9350 struct cfg80211_bss *bss) 9351 { 9352 u8 cur_channel; 9353 bool ret; 9354 9355 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9356 9357 rcu_read_lock(); 9358 if (ieee80211_mgd_csa_present(sdata, 9359 rcu_dereference(bss->beacon_ies), 9360 cur_channel, false)) { 9361 ret = true; 9362 goto out; 9363 } 9364 9365 if (ieee80211_mgd_csa_present(sdata, 9366 rcu_dereference(bss->proberesp_ies), 9367 cur_channel, bss->proberesp_ecsa_stuck)) { 9368 ret = true; 9369 goto out; 9370 } 9371 9372 ret = false; 9373 out: 9374 rcu_read_unlock(); 9375 return ret; 9376 } 9377 9378 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9379 const u8 *supported_selectors, 9380 u8 supported_selectors_len) 9381 { 9382 if (supported_selectors) { 9383 for (int i = 0; i < supported_selectors_len; i++) { 9384 set_bit(supported_selectors[i], 9385 userspace_selectors); 9386 } 9387 } else { 9388 /* Assume SAE_H2E support for backward compatibility. */ 9389 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9390 userspace_selectors); 9391 } 9392 } 9393 9394 /* config hooks */ 9395 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9396 struct cfg80211_auth_request *req) 9397 { 9398 struct ieee80211_local *local = sdata->local; 9399 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9400 struct ieee80211_mgd_auth_data *auth_data; 9401 struct ieee80211_conn_settings conn; 9402 struct ieee80211_link_data *link; 9403 struct ieee80211_supported_band *sband; 9404 struct ieee80211_bss *bss; 9405 u16 auth_alg; 9406 int err; 9407 bool cont_auth, wmm_used; 9408 9409 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9410 9411 /* prepare auth data structure */ 9412 9413 switch (req->auth_type) { 9414 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9415 auth_alg = WLAN_AUTH_OPEN; 9416 break; 9417 case NL80211_AUTHTYPE_SHARED_KEY: 9418 if (fips_enabled) 9419 return -EOPNOTSUPP; 9420 auth_alg = WLAN_AUTH_SHARED_KEY; 9421 break; 9422 case NL80211_AUTHTYPE_FT: 9423 auth_alg = WLAN_AUTH_FT; 9424 break; 9425 case NL80211_AUTHTYPE_NETWORK_EAP: 9426 auth_alg = WLAN_AUTH_LEAP; 9427 break; 9428 case NL80211_AUTHTYPE_SAE: 9429 auth_alg = WLAN_AUTH_SAE; 9430 break; 9431 case NL80211_AUTHTYPE_FILS_SK: 9432 auth_alg = WLAN_AUTH_FILS_SK; 9433 break; 9434 case NL80211_AUTHTYPE_FILS_SK_PFS: 9435 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9436 break; 9437 case NL80211_AUTHTYPE_FILS_PK: 9438 auth_alg = WLAN_AUTH_FILS_PK; 9439 break; 9440 case NL80211_AUTHTYPE_EPPKE: 9441 auth_alg = WLAN_AUTH_EPPKE; 9442 break; 9443 case NL80211_AUTHTYPE_IEEE8021X: 9444 auth_alg = WLAN_AUTH_IEEE8021X; 9445 break; 9446 default: 9447 return -EOPNOTSUPP; 9448 } 9449 9450 if (ifmgd->assoc_data) 9451 return -EBUSY; 9452 9453 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9454 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9455 return -EINVAL; 9456 } 9457 9458 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9459 req->ie_len, GFP_KERNEL); 9460 if (!auth_data) 9461 return -ENOMEM; 9462 9463 memcpy(auth_data->ap_addr, 9464 req->ap_mld_addr ?: req->bss->bssid, 9465 ETH_ALEN); 9466 auth_data->bss = req->bss; 9467 auth_data->link_id = req->link_id; 9468 9469 if (req->auth_data_len >= 4) { 9470 if (req->auth_type == NL80211_AUTHTYPE_SAE || 9471 req->auth_type == NL80211_AUTHTYPE_EPPKE || 9472 req->auth_type == NL80211_AUTHTYPE_IEEE8021X) { 9473 __le16 *pos = (__le16 *) req->auth_data; 9474 9475 auth_data->trans = le16_to_cpu(pos[0]); 9476 auth_data->status = le16_to_cpu(pos[1]); 9477 } 9478 9479 memcpy(auth_data->data, req->auth_data + 4, 9480 req->auth_data_len - 4); 9481 auth_data->data_len += req->auth_data_len - 4; 9482 } 9483 9484 /* Check if continuing authentication or trying to authenticate with the 9485 * same BSS that we were in the process of authenticating with and avoid 9486 * removal and re-addition of the STA entry in 9487 * ieee80211_prep_connection(). 9488 */ 9489 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9490 ifmgd->auth_data->link_id == req->link_id; 9491 9492 if (req->ie && req->ie_len) { 9493 memcpy(&auth_data->data[auth_data->data_len], 9494 req->ie, req->ie_len); 9495 auth_data->data_len += req->ie_len; 9496 } 9497 9498 if (req->key && req->key_len) { 9499 auth_data->key_len = req->key_len; 9500 auth_data->key_idx = req->key_idx; 9501 memcpy(auth_data->key, req->key, req->key_len); 9502 } 9503 9504 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9505 req->supported_selectors, 9506 req->supported_selectors_len); 9507 9508 auth_data->algorithm = auth_alg; 9509 9510 /* try to authenticate/probe */ 9511 9512 if (ifmgd->auth_data) { 9513 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9514 auth_data->peer_confirmed = 9515 ifmgd->auth_data->peer_confirmed; 9516 } 9517 ieee80211_destroy_auth_data(sdata, cont_auth); 9518 } 9519 9520 /* prep auth_data so we don't go into idle on disassoc */ 9521 ifmgd->auth_data = auth_data; 9522 9523 /* If this is continuation of an ongoing SAE authentication exchange 9524 * (i.e., request to send SAE Confirm) and the peer has already 9525 * confirmed, mark authentication completed since we are about to send 9526 * out SAE Confirm. 9527 */ 9528 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9529 auth_data->peer_confirmed && auth_data->trans == 2) 9530 ieee80211_mark_sta_auth(sdata); 9531 9532 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_EPPKE && 9533 auth_data->trans == 3) 9534 ieee80211_mark_sta_auth(sdata); 9535 9536 if (ifmgd->associated) { 9537 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9538 9539 sdata_info(sdata, 9540 "disconnect from AP %pM for new auth to %pM\n", 9541 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9542 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9543 WLAN_REASON_UNSPECIFIED, 9544 false, frame_buf); 9545 9546 ieee80211_report_disconnect(sdata, frame_buf, 9547 sizeof(frame_buf), true, 9548 WLAN_REASON_UNSPECIFIED, 9549 false); 9550 } 9551 9552 /* needed for transmitting the auth frame(s) properly */ 9553 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9554 9555 bss = (void *)req->bss->priv; 9556 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9557 9558 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9559 9560 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9561 &conn); 9562 9563 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9564 req->ap_mld_addr, cont_auth, 9565 &conn, false, 9566 auth_data->userspace_selectors); 9567 if (err) 9568 goto err_clear; 9569 9570 if (req->link_id >= 0) 9571 link = sdata_dereference(sdata->link[req->link_id], sdata); 9572 else 9573 link = &sdata->deflink; 9574 9575 if (WARN_ON(!link)) { 9576 err = -ENOLINK; 9577 goto err_clear; 9578 } 9579 9580 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9581 auth_data->ap_addr, link->conf->addr); 9582 9583 err = ieee80211_auth(sdata); 9584 if (err) { 9585 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9586 goto err_clear; 9587 } 9588 9589 /* hold our own reference */ 9590 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9591 return 0; 9592 9593 err_clear: 9594 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9595 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9596 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9597 BSS_CHANGED_BSSID); 9598 ieee80211_link_release_channel(&sdata->deflink); 9599 } 9600 ifmgd->auth_data = NULL; 9601 kfree(auth_data); 9602 return err; 9603 } 9604 9605 static void 9606 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9607 struct ieee80211_mgd_assoc_data *assoc_data, 9608 struct cfg80211_assoc_request *req, 9609 struct ieee80211_conn_settings *conn, 9610 unsigned int link_id) 9611 { 9612 struct ieee80211_local *local = sdata->local; 9613 const struct cfg80211_bss_ies *bss_ies; 9614 struct ieee80211_supported_band *sband; 9615 struct ieee80211_link_data *link; 9616 struct cfg80211_bss *cbss; 9617 struct ieee80211_bss *bss; 9618 9619 cbss = assoc_data->link[link_id].bss; 9620 if (WARN_ON(!cbss)) 9621 return; 9622 9623 bss = (void *)cbss->priv; 9624 9625 sband = local->hw.wiphy->bands[cbss->channel->band]; 9626 if (WARN_ON(!sband)) 9627 return; 9628 9629 link = sdata_dereference(sdata->link[link_id], sdata); 9630 if (WARN_ON(!link)) 9631 return; 9632 9633 /* for MLO connections assume advertising all rates is OK */ 9634 if (!req->ap_mld_addr) { 9635 assoc_data->supp_rates = bss->supp_rates; 9636 assoc_data->supp_rates_len = bss->supp_rates_len; 9637 } 9638 9639 /* copy and link elems for the STA profile */ 9640 if (req->links[link_id].elems_len) { 9641 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9642 req->links[link_id].elems_len); 9643 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9644 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9645 assoc_data->ie_pos += req->links[link_id].elems_len; 9646 } 9647 9648 link->u.mgd.beacon_crc_valid = false; 9649 link->u.mgd.dtim_period = 0; 9650 link->u.mgd.have_beacon = false; 9651 9652 /* override HT configuration only if the AP and we support it */ 9653 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9654 struct ieee80211_sta_ht_cap sta_ht_cap; 9655 9656 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9657 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9658 } 9659 9660 rcu_read_lock(); 9661 bss_ies = rcu_dereference(cbss->beacon_ies); 9662 if (bss_ies) { 9663 u8 dtim_count = 0; 9664 9665 ieee80211_get_dtim(bss_ies, &dtim_count, 9666 &link->u.mgd.dtim_period); 9667 9668 sdata->deflink.u.mgd.have_beacon = true; 9669 9670 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9671 link->conf->sync_tsf = bss_ies->tsf; 9672 link->conf->sync_device_ts = bss->device_ts_beacon; 9673 link->conf->sync_dtim_count = dtim_count; 9674 } 9675 } else { 9676 bss_ies = rcu_dereference(cbss->ies); 9677 } 9678 9679 if (bss_ies) { 9680 const struct element *elem; 9681 9682 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9683 bss_ies->data, bss_ies->len); 9684 if (elem && elem->datalen >= 3) 9685 link->conf->profile_periodicity = elem->data[2]; 9686 else 9687 link->conf->profile_periodicity = 0; 9688 9689 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9690 bss_ies->data, bss_ies->len); 9691 if (elem && elem->datalen >= 11 && 9692 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9693 link->conf->ema_ap = true; 9694 else 9695 link->conf->ema_ap = false; 9696 } 9697 rcu_read_unlock(); 9698 9699 if (bss->corrupt_data) { 9700 char *corrupt_type = "data"; 9701 9702 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9703 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9704 corrupt_type = "beacon and probe response"; 9705 else 9706 corrupt_type = "beacon"; 9707 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9708 corrupt_type = "probe response"; 9709 } 9710 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9711 cbss->bssid, corrupt_type); 9712 } 9713 9714 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9715 if (sdata->u.mgd.powersave) 9716 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9717 else 9718 link->smps_mode = IEEE80211_SMPS_OFF; 9719 } else { 9720 link->smps_mode = link->u.mgd.req_smps; 9721 } 9722 } 9723 9724 static int 9725 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9726 struct ieee80211_mgd_assoc_data *assoc_data, 9727 int link_id) 9728 { 9729 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9730 enum nl80211_band band = cbss->channel->band; 9731 struct ieee80211_supported_band *sband; 9732 const struct element *elem; 9733 int err; 9734 9735 /* neither HT nor VHT elements used on 6 GHz */ 9736 if (band == NL80211_BAND_6GHZ) 9737 return 0; 9738 9739 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9740 return 0; 9741 9742 rcu_read_lock(); 9743 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9744 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9745 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9746 cbss->bssid); 9747 err = -EINVAL; 9748 goto out_rcu; 9749 } 9750 assoc_data->link[link_id].ap_ht_param = 9751 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9752 rcu_read_unlock(); 9753 9754 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9755 return 0; 9756 9757 /* some drivers want to support VHT on 2.4 GHz even */ 9758 sband = sdata->local->hw.wiphy->bands[band]; 9759 if (!sband->vht_cap.vht_supported) 9760 return 0; 9761 9762 rcu_read_lock(); 9763 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9764 /* but even then accept it not being present on the AP */ 9765 if (!elem && band == NL80211_BAND_2GHZ) { 9766 err = 0; 9767 goto out_rcu; 9768 } 9769 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9770 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9771 cbss->bssid); 9772 err = -EINVAL; 9773 goto out_rcu; 9774 } 9775 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9776 sizeof(struct ieee80211_vht_cap)); 9777 rcu_read_unlock(); 9778 9779 return 0; 9780 out_rcu: 9781 rcu_read_unlock(); 9782 return err; 9783 } 9784 9785 static bool 9786 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9787 { 9788 const struct cfg80211_bss_ies *ies; 9789 struct cfg80211_bss *bss; 9790 const struct element *ml; 9791 9792 /* not an MLO connection if link_id < 0, so irrelevant */ 9793 if (req->link_id < 0) 9794 return false; 9795 9796 bss = req->links[req->link_id].bss; 9797 9798 guard(rcu)(); 9799 ies = rcu_dereference(bss->ies); 9800 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9801 ies->data, ies->len) { 9802 const struct ieee80211_multi_link_elem *mle; 9803 9804 if (!ieee80211_mle_type_ok(ml->data + 1, 9805 IEEE80211_ML_CONTROL_TYPE_BASIC, 9806 ml->datalen - 1)) 9807 continue; 9808 9809 mle = (void *)(ml->data + 1); 9810 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9811 return true; 9812 } 9813 9814 return false; 9815 9816 } 9817 9818 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9819 struct cfg80211_assoc_request *req) 9820 { 9821 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9822 struct ieee80211_local *local = sdata->local; 9823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9824 struct ieee80211_mgd_assoc_data *assoc_data; 9825 const struct element *ssid_elem; 9826 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9827 struct ieee80211_link_data *link; 9828 struct cfg80211_bss *cbss; 9829 bool override, uapsd_supported; 9830 bool match_auth; 9831 int i, err; 9832 size_t size = sizeof(*assoc_data) + req->ie_len; 9833 9834 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9835 size += req->links[i].elems_len; 9836 9837 /* FIXME: no support for 4-addr MLO yet */ 9838 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9839 return -EOPNOTSUPP; 9840 9841 assoc_data = kzalloc(size, GFP_KERNEL); 9842 if (!assoc_data) 9843 return -ENOMEM; 9844 9845 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9846 9847 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9848 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9849 err = -EINVAL; 9850 goto err_free; 9851 } 9852 9853 rcu_read_lock(); 9854 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9855 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9856 rcu_read_unlock(); 9857 err = -EINVAL; 9858 goto err_free; 9859 } 9860 9861 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9862 assoc_data->ssid_len = ssid_elem->datalen; 9863 rcu_read_unlock(); 9864 9865 if (req->ap_mld_addr) 9866 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9867 else 9868 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9869 9870 /* 9871 * Many APs have broken parsing of the extended MLD capa/ops field, 9872 * dropping (re-)association request frames or replying with association 9873 * response with a failure status if it's present. 9874 * Set our value from the userspace request only in strict mode or if 9875 * the AP also had that field present. 9876 */ 9877 if (ieee80211_hw_check(&local->hw, STRICT) || 9878 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9879 assoc_data->ext_mld_capa_ops = 9880 cpu_to_le16(req->ext_mld_capa_ops); 9881 9882 if (ifmgd->associated) { 9883 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9884 9885 sdata_info(sdata, 9886 "disconnect from AP %pM for new assoc to %pM\n", 9887 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9888 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9889 WLAN_REASON_UNSPECIFIED, 9890 false, frame_buf); 9891 9892 ieee80211_report_disconnect(sdata, frame_buf, 9893 sizeof(frame_buf), true, 9894 WLAN_REASON_UNSPECIFIED, 9895 false); 9896 } 9897 9898 memset(sdata->u.mgd.userspace_selectors, 0, 9899 sizeof(sdata->u.mgd.userspace_selectors)); 9900 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9901 req->supported_selectors, 9902 req->supported_selectors_len); 9903 9904 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9905 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9906 sizeof(ifmgd->ht_capa_mask)); 9907 9908 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9909 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9910 sizeof(ifmgd->vht_capa_mask)); 9911 9912 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9913 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9914 sizeof(ifmgd->s1g_capa_mask)); 9915 9916 /* keep some setup (AP STA, channel, ...) if matching */ 9917 match_auth = ifmgd->auth_data && 9918 ether_addr_equal(ifmgd->auth_data->ap_addr, 9919 assoc_data->ap_addr) && 9920 ifmgd->auth_data->link_id == req->link_id; 9921 9922 if (req->ap_mld_addr) { 9923 uapsd_supported = true; 9924 9925 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9926 ASSOC_REQ_DISABLE_VHT | 9927 ASSOC_REQ_DISABLE_HE | 9928 ASSOC_REQ_DISABLE_EHT)) { 9929 err = -EINVAL; 9930 goto err_free; 9931 } 9932 9933 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9934 struct ieee80211_supported_band *sband; 9935 struct cfg80211_bss *link_cbss = req->links[i].bss; 9936 struct ieee80211_bss *bss; 9937 9938 if (!link_cbss) 9939 continue; 9940 9941 bss = (void *)link_cbss->priv; 9942 9943 if (!bss->wmm_used) { 9944 err = -EINVAL; 9945 req->links[i].error = err; 9946 goto err_free; 9947 } 9948 9949 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9950 err = -EINVAL; 9951 req->links[i].error = err; 9952 goto err_free; 9953 } 9954 9955 link = sdata_dereference(sdata->link[i], sdata); 9956 if (link) 9957 ether_addr_copy(assoc_data->link[i].addr, 9958 link->conf->addr); 9959 else 9960 eth_random_addr(assoc_data->link[i].addr); 9961 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9962 9963 if (match_auth && i == assoc_link_id && link) 9964 assoc_data->link[i].conn = link->u.mgd.conn; 9965 else 9966 assoc_data->link[i].conn = 9967 ieee80211_conn_settings_unlimited; 9968 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9969 req, true, i, 9970 &assoc_data->link[i].conn); 9971 assoc_data->link[i].bss = link_cbss; 9972 9973 if (!bss->uapsd_supported) 9974 uapsd_supported = false; 9975 9976 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9977 err = -EINVAL; 9978 req->links[i].error = err; 9979 goto err_free; 9980 } 9981 9982 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9983 assoc_data, i); 9984 if (err) { 9985 err = -EINVAL; 9986 req->links[i].error = err; 9987 goto err_free; 9988 } 9989 } 9990 9991 assoc_data->wmm = true; 9992 } else { 9993 struct ieee80211_supported_band *sband; 9994 struct ieee80211_bss *bss = (void *)cbss->priv; 9995 9996 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9997 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9998 9999 assoc_data->wmm = bss->wmm_used && 10000 (local->hw.queues >= IEEE80211_NUM_ACS); 10001 10002 if (cbss->channel->band == NL80211_BAND_6GHZ && 10003 req->flags & (ASSOC_REQ_DISABLE_HT | 10004 ASSOC_REQ_DISABLE_VHT | 10005 ASSOC_REQ_DISABLE_HE)) { 10006 err = -EINVAL; 10007 goto err_free; 10008 } 10009 10010 sband = local->hw.wiphy->bands[cbss->channel->band]; 10011 10012 assoc_data->link[0].bss = cbss; 10013 10014 if (match_auth) 10015 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 10016 else 10017 assoc_data->link[0].conn = 10018 ieee80211_conn_settings_unlimited; 10019 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 10020 assoc_data->wmm, 0, 10021 &assoc_data->link[0].conn); 10022 10023 uapsd_supported = bss->uapsd_supported; 10024 10025 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 10026 if (err) 10027 goto err_free; 10028 } 10029 10030 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 10031 10032 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 10033 err = -EBUSY; 10034 goto err_free; 10035 } 10036 10037 if (ifmgd->assoc_data) { 10038 err = -EBUSY; 10039 goto err_free; 10040 } 10041 10042 /* Cleanup is delayed if auth_data matches */ 10043 if (ifmgd->auth_data && !match_auth) 10044 ieee80211_destroy_auth_data(sdata, false); 10045 10046 if (req->ie && req->ie_len) { 10047 memcpy(assoc_data->ie, req->ie, req->ie_len); 10048 assoc_data->ie_len = req->ie_len; 10049 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 10050 } else { 10051 assoc_data->ie_pos = assoc_data->ie; 10052 } 10053 10054 if (req->fils_kek) { 10055 /* should already be checked in cfg80211 - so warn */ 10056 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 10057 err = -EINVAL; 10058 goto err_free; 10059 } 10060 memcpy(assoc_data->fils_kek, req->fils_kek, 10061 req->fils_kek_len); 10062 assoc_data->fils_kek_len = req->fils_kek_len; 10063 } 10064 10065 if (req->fils_nonces) 10066 memcpy(assoc_data->fils_nonces, req->fils_nonces, 10067 2 * FILS_NONCE_LEN); 10068 10069 /* default timeout */ 10070 assoc_data->timeout = jiffies; 10071 assoc_data->timeout_started = true; 10072 10073 assoc_data->assoc_link_id = assoc_link_id; 10074 10075 if (req->ap_mld_addr) { 10076 /* if there was no authentication, set up the link */ 10077 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 10078 if (err) 10079 goto err_clear; 10080 } 10081 10082 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 10083 if (WARN_ON(!link)) { 10084 err = -EINVAL; 10085 goto err_clear; 10086 } 10087 10088 override = link->u.mgd.conn.mode != 10089 assoc_data->link[assoc_link_id].conn.mode || 10090 link->u.mgd.conn.bw_limit != 10091 assoc_data->link[assoc_link_id].conn.bw_limit; 10092 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 10093 10094 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 10095 assoc_link_id); 10096 10097 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 10098 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 10099 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 10100 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 10101 10102 if (assoc_data->wmm && uapsd_supported && 10103 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 10104 assoc_data->uapsd = true; 10105 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 10106 } else { 10107 assoc_data->uapsd = false; 10108 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 10109 } 10110 10111 if (req->prev_bssid) 10112 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 10113 10114 if (req->use_mfp) { 10115 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 10116 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 10117 } else { 10118 ifmgd->mfp = IEEE80211_MFP_DISABLED; 10119 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 10120 } 10121 10122 if (req->flags & ASSOC_REQ_USE_RRM) 10123 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 10124 else 10125 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 10126 10127 if (req->crypto.control_port) 10128 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 10129 else 10130 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 10131 10132 sdata->control_port_protocol = req->crypto.control_port_ethertype; 10133 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 10134 sdata->control_port_over_nl80211 = 10135 req->crypto.control_port_over_nl80211; 10136 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 10137 10138 /* kick off associate process */ 10139 ifmgd->assoc_data = assoc_data; 10140 10141 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 10142 if (!assoc_data->link[i].bss) 10143 continue; 10144 if (i == assoc_data->assoc_link_id) 10145 continue; 10146 /* only calculate the mode, hence link == NULL */ 10147 err = ieee80211_prep_channel(sdata, NULL, i, 10148 assoc_data->link[i].bss, true, 10149 &assoc_data->link[i].conn, 10150 sdata->u.mgd.userspace_selectors); 10151 if (err) { 10152 req->links[i].error = err; 10153 goto err_clear; 10154 } 10155 } 10156 10157 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 10158 vif_cfg->ssid_len = assoc_data->ssid_len; 10159 10160 /* needed for transmitting the assoc frames properly */ 10161 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 10162 10163 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 10164 req->ap_mld_addr, true, 10165 &assoc_data->link[assoc_link_id].conn, 10166 override, 10167 sdata->u.mgd.userspace_selectors); 10168 if (err) 10169 goto err_clear; 10170 10171 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 10172 const struct cfg80211_bss_ies *beacon_ies; 10173 10174 rcu_read_lock(); 10175 beacon_ies = rcu_dereference(req->bss->beacon_ies); 10176 if (!beacon_ies) { 10177 /* 10178 * Wait up to one beacon interval ... 10179 * should this be more if we miss one? 10180 */ 10181 sdata_info(sdata, "waiting for beacon from %pM\n", 10182 link->u.mgd.bssid); 10183 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 10184 assoc_data->timeout_started = true; 10185 assoc_data->need_beacon = true; 10186 } 10187 rcu_read_unlock(); 10188 } 10189 10190 run_again(sdata, assoc_data->timeout); 10191 10192 /* We are associating, clean up auth_data */ 10193 if (ifmgd->auth_data) 10194 ieee80211_destroy_auth_data(sdata, true); 10195 10196 return 0; 10197 err_clear: 10198 if (!ifmgd->auth_data) { 10199 eth_zero_addr(sdata->deflink.u.mgd.bssid); 10200 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 10201 BSS_CHANGED_BSSID); 10202 } 10203 ifmgd->assoc_data = NULL; 10204 err_free: 10205 kfree(assoc_data); 10206 return err; 10207 } 10208 10209 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 10210 struct cfg80211_deauth_request *req) 10211 { 10212 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10213 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10214 bool tx = !req->local_state_change; 10215 struct ieee80211_prep_tx_info info = { 10216 .subtype = IEEE80211_STYPE_DEAUTH, 10217 }; 10218 10219 if (ifmgd->auth_data && 10220 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 10221 sdata_info(sdata, 10222 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 10223 req->bssid, req->reason_code, 10224 ieee80211_get_reason_code_string(req->reason_code)); 10225 10226 info.link_id = ifmgd->auth_data->link_id; 10227 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10228 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10229 IEEE80211_STYPE_DEAUTH, 10230 req->reason_code, tx, 10231 frame_buf); 10232 ieee80211_destroy_auth_data(sdata, false); 10233 ieee80211_report_disconnect(sdata, frame_buf, 10234 sizeof(frame_buf), true, 10235 req->reason_code, false); 10236 drv_mgd_complete_tx(sdata->local, sdata, &info); 10237 return 0; 10238 } 10239 10240 if (ifmgd->assoc_data && 10241 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10242 sdata_info(sdata, 10243 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10244 req->bssid, req->reason_code, 10245 ieee80211_get_reason_code_string(req->reason_code)); 10246 10247 info.link_id = ifmgd->assoc_data->assoc_link_id; 10248 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10249 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10250 IEEE80211_STYPE_DEAUTH, 10251 req->reason_code, tx, 10252 frame_buf); 10253 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10254 ieee80211_report_disconnect(sdata, frame_buf, 10255 sizeof(frame_buf), true, 10256 req->reason_code, false); 10257 drv_mgd_complete_tx(sdata->local, sdata, &info); 10258 return 0; 10259 } 10260 10261 if (ifmgd->associated && 10262 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10263 sdata_info(sdata, 10264 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10265 req->bssid, req->reason_code, 10266 ieee80211_get_reason_code_string(req->reason_code)); 10267 10268 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10269 req->reason_code, tx, frame_buf); 10270 ieee80211_report_disconnect(sdata, frame_buf, 10271 sizeof(frame_buf), true, 10272 req->reason_code, false); 10273 return 0; 10274 } 10275 10276 return -ENOTCONN; 10277 } 10278 10279 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10280 struct cfg80211_disassoc_request *req) 10281 { 10282 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10283 10284 if (!sdata->u.mgd.associated || 10285 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10286 return -ENOTCONN; 10287 10288 sdata_info(sdata, 10289 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10290 req->ap_addr, req->reason_code, 10291 ieee80211_get_reason_code_string(req->reason_code)); 10292 10293 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10294 req->reason_code, !req->local_state_change, 10295 frame_buf); 10296 10297 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10298 req->reason_code, false); 10299 10300 return 0; 10301 } 10302 10303 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10304 { 10305 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10306 &link->u.mgd.request_smps_work); 10307 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10308 &link->u.mgd.recalc_smps); 10309 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10310 &link->u.mgd.csa.switch_work); 10311 } 10312 10313 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10314 { 10315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10316 10317 /* 10318 * Make sure some work items will not run after this, 10319 * they will not do anything but might not have been 10320 * cancelled when disconnecting. 10321 */ 10322 wiphy_work_cancel(sdata->local->hw.wiphy, 10323 &ifmgd->monitor_work); 10324 wiphy_work_cancel(sdata->local->hw.wiphy, 10325 &ifmgd->beacon_connection_loss_work); 10326 wiphy_work_cancel(sdata->local->hw.wiphy, 10327 &ifmgd->csa_connection_drop_work); 10328 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10329 &ifmgd->tdls_peer_del_work); 10330 10331 if (ifmgd->assoc_data) 10332 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10333 if (ifmgd->auth_data) 10334 ieee80211_destroy_auth_data(sdata, false); 10335 spin_lock_bh(&ifmgd->teardown_lock); 10336 if (ifmgd->teardown_skb) { 10337 kfree_skb(ifmgd->teardown_skb); 10338 ifmgd->teardown_skb = NULL; 10339 ifmgd->orig_teardown_skb = NULL; 10340 } 10341 kfree(ifmgd->assoc_req_ies); 10342 ifmgd->assoc_req_ies = NULL; 10343 ifmgd->assoc_req_ies_len = 0; 10344 spin_unlock_bh(&ifmgd->teardown_lock); 10345 timer_delete_sync(&ifmgd->timer); 10346 } 10347 10348 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10349 enum nl80211_cqm_rssi_threshold_event rssi_event, 10350 s32 rssi_level, 10351 gfp_t gfp) 10352 { 10353 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10354 10355 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10356 10357 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10358 } 10359 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10360 10361 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10362 { 10363 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10364 10365 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10366 10367 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10368 } 10369 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10370 10371 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10372 int rssi_min_thold, 10373 int rssi_max_thold) 10374 { 10375 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10376 10377 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10378 return; 10379 10380 /* 10381 * Scale up threshold values before storing it, as the RSSI averaging 10382 * algorithm uses a scaled up value as well. Change this scaling 10383 * factor if the RSSI averaging algorithm changes. 10384 */ 10385 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10386 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10387 } 10388 10389 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10390 int rssi_min_thold, 10391 int rssi_max_thold) 10392 { 10393 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10394 10395 WARN_ON(rssi_min_thold == rssi_max_thold || 10396 rssi_min_thold > rssi_max_thold); 10397 10398 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10399 rssi_max_thold); 10400 } 10401 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10402 10403 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10404 { 10405 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10406 10407 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10408 } 10409 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10410 10411 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10412 struct ieee80211_mgmt *mgmt, size_t len) 10413 { 10414 struct ieee80211_local *local = sdata->local; 10415 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10416 struct ieee80211_mgd_assoc_data *add_links_data = 10417 ifmgd->reconf.add_links_data; 10418 struct sta_info *sta; 10419 struct cfg80211_mlo_reconf_done_data done_data = {}; 10420 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10421 sdata->u.mgd.reconf.removed_links; 10422 u16 link_mask, valid_links; 10423 unsigned int link_id; 10424 size_t orig_len = len; 10425 u8 i, group_key_data_len; 10426 u8 *pos; 10427 10428 if (!ieee80211_vif_is_mld(&sdata->vif) || 10429 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10430 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10431 sdata->u.mgd.reconf.dialog_token || 10432 !sta_changed_links) 10433 return; 10434 10435 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10436 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10437 10438 /* each status duple is 3 octets */ 10439 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10440 sdata_info(sdata, 10441 "mlo: reconf: unexpected len=%zu, count=%u\n", 10442 len, mgmt->u.action.u.ml_reconf_resp.count); 10443 goto disconnect; 10444 } 10445 10446 link_mask = sta_changed_links; 10447 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10448 u16 status = get_unaligned_le16(pos + 1); 10449 10450 link_id = *pos; 10451 10452 if (!(link_mask & BIT(link_id))) { 10453 sdata_info(sdata, 10454 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10455 link_id, sta_changed_links); 10456 goto disconnect; 10457 } 10458 10459 /* clear the corresponding link, to detect the case that 10460 * the same link was included more than one time 10461 */ 10462 link_mask &= ~BIT(link_id); 10463 10464 /* Handle failure to remove links here. Failure to remove added 10465 * links will be done later in the flow. 10466 */ 10467 if (status != WLAN_STATUS_SUCCESS) { 10468 sdata_info(sdata, 10469 "mlo: reconf: failed on link=%u, status=%u\n", 10470 link_id, status); 10471 10472 /* The AP MLD failed to remove a link that was already 10473 * removed locally. As this is not expected behavior, 10474 * disconnect 10475 */ 10476 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10477 goto disconnect; 10478 10479 /* The AP MLD failed to add a link. Remove it from the 10480 * added links. 10481 */ 10482 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10483 } 10484 10485 pos += 3; 10486 len -= 3; 10487 } 10488 10489 if (link_mask) { 10490 sdata_info(sdata, 10491 "mlo: reconf: no response for links=0x%x\n", 10492 link_mask); 10493 goto disconnect; 10494 } 10495 10496 if (!sdata->u.mgd.reconf.added_links) 10497 goto out; 10498 10499 if (len < 1 || len < 1 + *pos) { 10500 sdata_info(sdata, 10501 "mlo: reconf: invalid group key data length"); 10502 goto disconnect; 10503 } 10504 10505 /* The Group Key Data field must be present when links are added. This 10506 * field should be processed by userland. 10507 */ 10508 group_key_data_len = *pos++; 10509 10510 pos += group_key_data_len; 10511 len -= group_key_data_len + 1; 10512 10513 /* Process the information for the added links */ 10514 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10515 if (WARN_ON(!sta)) 10516 goto disconnect; 10517 10518 valid_links = sdata->vif.valid_links; 10519 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10520 if (!add_links_data->link[link_id].bss || 10521 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10522 continue; 10523 10524 valid_links |= BIT(link_id); 10525 if (ieee80211_sta_allocate_link(sta, link_id)) 10526 goto disconnect; 10527 } 10528 10529 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10530 link_mask = 0; 10531 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10532 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10533 struct ieee80211_link_data *link; 10534 struct link_sta_info *link_sta; 10535 u64 changed = 0; 10536 10537 if (!cbss) 10538 continue; 10539 10540 link = sdata_dereference(sdata->link[link_id], sdata); 10541 if (WARN_ON(!link)) 10542 goto disconnect; 10543 10544 link_info(link, 10545 "mlo: reconf: local address %pM, AP link address %pM\n", 10546 add_links_data->link[link_id].addr, 10547 add_links_data->link[link_id].bss->bssid); 10548 10549 link_sta = rcu_dereference_protected(sta->link[link_id], 10550 lockdep_is_held(&local->hw.wiphy->mtx)); 10551 if (WARN_ON(!link_sta)) 10552 goto disconnect; 10553 10554 if (!link->u.mgd.have_beacon) { 10555 const struct cfg80211_bss_ies *ies; 10556 10557 rcu_read_lock(); 10558 ies = rcu_dereference(cbss->beacon_ies); 10559 if (ies) 10560 link->u.mgd.have_beacon = true; 10561 else 10562 ies = rcu_dereference(cbss->ies); 10563 ieee80211_get_dtim(ies, 10564 &link->conf->sync_dtim_count, 10565 &link->u.mgd.dtim_period); 10566 link->conf->beacon_int = cbss->beacon_interval; 10567 rcu_read_unlock(); 10568 } 10569 10570 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10571 10572 link->u.mgd.conn = add_links_data->link[link_id].conn; 10573 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10574 true, &link->u.mgd.conn, 10575 sdata->u.mgd.userspace_selectors)) { 10576 link_info(link, "mlo: reconf: prep_channel failed\n"); 10577 goto disconnect; 10578 } 10579 10580 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10581 add_links_data->link[link_id].bss)) 10582 goto disconnect; 10583 10584 if (!ieee80211_assoc_config_link(link, link_sta, 10585 add_links_data->link[link_id].bss, 10586 mgmt, pos, len, 10587 &changed)) 10588 goto disconnect; 10589 10590 /* The AP MLD indicated success for this link, but the station 10591 * profile status indicated otherwise. Since there is an 10592 * inconsistency in the ML reconfiguration response, disconnect 10593 */ 10594 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10595 goto disconnect; 10596 10597 ieee80211_sta_init_nss(link_sta); 10598 if (ieee80211_sta_activate_link(sta, link_id)) 10599 goto disconnect; 10600 10601 changed |= ieee80211_link_set_associated(link, cbss); 10602 ieee80211_link_info_change_notify(sdata, link, changed); 10603 10604 ieee80211_recalc_smps(sdata, link); 10605 link_mask |= BIT(link_id); 10606 } 10607 10608 sdata_info(sdata, 10609 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10610 valid_links, link_mask); 10611 10612 /* links might have changed due to rejected ones, set them again */ 10613 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10614 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10615 10616 ieee80211_recalc_ps(local); 10617 ieee80211_recalc_ps_vif(sdata); 10618 10619 done_data.buf = (const u8 *)mgmt; 10620 done_data.len = orig_len; 10621 done_data.added_links = link_mask; 10622 10623 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10624 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10625 done_data.links[link_id].addr = 10626 add_links_data->link[link_id].addr; 10627 } 10628 10629 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10630 kfree(sdata->u.mgd.reconf.add_links_data); 10631 sdata->u.mgd.reconf.add_links_data = NULL; 10632 out: 10633 ieee80211_ml_reconf_reset(sdata); 10634 return; 10635 10636 disconnect: 10637 __ieee80211_disconnect(sdata); 10638 } 10639 10640 static struct sk_buff * 10641 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10642 struct ieee80211_mgd_assoc_data *add_links_data, 10643 u16 removed_links, __le16 ext_mld_capa_ops) 10644 { 10645 struct ieee80211_local *local = sdata->local; 10646 struct ieee80211_mgmt *mgmt; 10647 struct ieee80211_multi_link_elem *ml_elem; 10648 struct ieee80211_mle_basic_common_info *common; 10649 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10650 struct sk_buff *skb; 10651 size_t size; 10652 unsigned int link_id; 10653 __le16 eml_capa = 0, mld_capa_ops = 0; 10654 struct ieee80211_tx_info *info; 10655 u8 common_size, var_common_size; 10656 u8 *ml_elem_len; 10657 u16 capab = 0; 10658 10659 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10660 10661 /* Consider the maximal length of the reconfiguration ML element */ 10662 size += sizeof(struct ieee80211_multi_link_elem); 10663 10664 /* The Basic ML element and the Reconfiguration ML element have the same 10665 * fixed common information fields in the context of ML reconfiguration 10666 * action frame. The AP MLD MAC address must always be present 10667 */ 10668 common_size = sizeof(*common); 10669 10670 /* when adding links, the MLD capabilities must be present */ 10671 var_common_size = 0; 10672 if (add_links_data) { 10673 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10674 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10675 ieee80211_vif_type_p2p(&sdata->vif)); 10676 10677 if (ift_ext_capa) { 10678 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10679 mld_capa_ops = 10680 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10681 } 10682 10683 /* MLD capabilities and operation */ 10684 var_common_size += 2; 10685 10686 /* EML capabilities */ 10687 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10688 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10689 var_common_size += 2; 10690 } 10691 10692 if (ext_mld_capa_ops) 10693 var_common_size += 2; 10694 10695 /* Add the common information length */ 10696 size += common_size + var_common_size; 10697 10698 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10699 struct cfg80211_bss *cbss; 10700 size_t elems_len; 10701 10702 if (removed_links & BIT(link_id)) { 10703 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10704 ETH_ALEN; 10705 continue; 10706 } 10707 10708 if (!add_links_data || !add_links_data->link[link_id].bss) 10709 continue; 10710 10711 elems_len = add_links_data->link[link_id].elems_len; 10712 cbss = add_links_data->link[link_id].bss; 10713 10714 /* should be the same across all BSSes */ 10715 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10716 capab |= WLAN_CAPABILITY_PRIVACY; 10717 10718 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10719 ETH_ALEN; 10720 10721 /* WMM */ 10722 size += 9; 10723 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10724 elems_len); 10725 } 10726 10727 skb = alloc_skb(size, GFP_KERNEL); 10728 if (!skb) 10729 return NULL; 10730 10731 skb_reserve(skb, local->hw.extra_tx_headroom); 10732 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10733 u.action.u.ml_reconf_req)); 10734 10735 /* Add the MAC header */ 10736 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10737 IEEE80211_STYPE_ACTION); 10738 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10739 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10740 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10741 10742 /* Add the action frame fixed fields */ 10743 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10744 mgmt->u.action.u.ml_reconf_req.action_code = 10745 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10746 10747 /* allocate a dialog token and store it */ 10748 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10749 mgmt->u.action.u.ml_reconf_req.dialog_token = 10750 sdata->u.mgd.reconf.dialog_token; 10751 10752 /* Add the ML reconfiguration element and the common information */ 10753 skb_put_u8(skb, WLAN_EID_EXTENSION); 10754 ml_elem_len = skb_put(skb, 1); 10755 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10756 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10757 ml_elem->control = 10758 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10759 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10760 common = skb_put(skb, common_size); 10761 common->len = common_size + var_common_size; 10762 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10763 10764 if (add_links_data) { 10765 if (eml_capa & 10766 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10767 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10768 ml_elem->control |= 10769 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10770 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10771 } 10772 10773 ml_elem->control |= 10774 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10775 10776 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10777 } 10778 10779 if (ext_mld_capa_ops) { 10780 ml_elem->control |= 10781 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10782 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10783 } 10784 10785 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10786 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10787 10788 /* Add the per station profile */ 10789 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10790 u8 *subelem_len = NULL; 10791 u16 ctrl; 10792 const u8 *addr; 10793 10794 /* Skip links that are not changing */ 10795 if (!(removed_links & BIT(link_id)) && 10796 (!add_links_data || !add_links_data->link[link_id].bss)) 10797 continue; 10798 10799 ctrl = link_id | 10800 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10801 10802 if (removed_links & BIT(link_id)) { 10803 struct ieee80211_bss_conf *conf = 10804 sdata_dereference(sdata->vif.link_conf[link_id], 10805 sdata); 10806 if (!conf) 10807 continue; 10808 10809 addr = conf->addr; 10810 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10811 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10812 } else { 10813 addr = add_links_data->link[link_id].addr; 10814 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10815 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10816 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10817 } 10818 10819 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10820 subelem_len = skb_put(skb, 1); 10821 10822 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10823 skb_put_u8(skb, 1 + ETH_ALEN); 10824 skb_put_data(skb, addr, ETH_ALEN); 10825 10826 if (!(removed_links & BIT(link_id))) { 10827 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10828 size_t extra_used; 10829 void *capab_pos; 10830 u8 qos_info; 10831 10832 capab_pos = skb_put(skb, 2); 10833 10834 extra_used = 10835 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10836 add_links_data->link[link_id].elems, 10837 add_links_data->link[link_id].elems_len, 10838 link_id, NULL, 10839 link_present_elems, 10840 add_links_data); 10841 10842 if (add_links_data->link[link_id].elems) 10843 skb_put_data(skb, 10844 add_links_data->link[link_id].elems + 10845 extra_used, 10846 add_links_data->link[link_id].elems_len - 10847 extra_used); 10848 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10849 qos_info = sdata->u.mgd.uapsd_queues; 10850 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10851 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10852 } else { 10853 qos_info = 0; 10854 } 10855 10856 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10857 put_unaligned_le16(capab, capab_pos); 10858 } 10859 10860 ieee80211_fragment_element(skb, subelem_len, 10861 IEEE80211_MLE_SUBELEM_FRAGMENT); 10862 } 10863 10864 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10865 10866 info = IEEE80211_SKB_CB(skb); 10867 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10868 10869 return skb; 10870 } 10871 10872 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10873 struct cfg80211_ml_reconf_req *req) 10874 { 10875 struct ieee80211_local *local = sdata->local; 10876 struct ieee80211_mgd_assoc_data *data = NULL; 10877 struct sta_info *sta; 10878 struct sk_buff *skb; 10879 u16 added_links, new_valid_links; 10880 int link_id, err; 10881 10882 if (!ieee80211_vif_is_mld(&sdata->vif) || 10883 !(sdata->vif.cfg.mld_capa_op & 10884 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10885 return -EINVAL; 10886 10887 /* No support for concurrent ML reconfiguration operation */ 10888 if (sdata->u.mgd.reconf.added_links || 10889 sdata->u.mgd.reconf.removed_links) 10890 return -EBUSY; 10891 10892 added_links = 0; 10893 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10894 if (!req->add_links[link_id].bss) 10895 continue; 10896 10897 added_links |= BIT(link_id); 10898 } 10899 10900 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10901 if (WARN_ON(!sta)) 10902 return -ENOLINK; 10903 10904 /* Adding links to the set of valid link is done only after a successful 10905 * ML reconfiguration frame exchange. Here prepare the data for the ML 10906 * reconfiguration frame construction and allocate the required 10907 * resources 10908 */ 10909 if (added_links) { 10910 bool uapsd_supported; 10911 10912 data = kzalloc_obj(*data); 10913 if (!data) 10914 return -ENOMEM; 10915 10916 data->assoc_link_id = -1; 10917 data->wmm = true; 10918 10919 uapsd_supported = true; 10920 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10921 link_id++) { 10922 struct ieee80211_supported_band *sband; 10923 struct cfg80211_bss *link_cbss = 10924 req->add_links[link_id].bss; 10925 struct ieee80211_bss *bss; 10926 10927 if (!link_cbss) 10928 continue; 10929 10930 bss = (void *)link_cbss->priv; 10931 10932 if (!bss->wmm_used) { 10933 err = -EINVAL; 10934 goto err_free; 10935 } 10936 10937 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10938 err = -EINVAL; 10939 goto err_free; 10940 } 10941 10942 eth_random_addr(data->link[link_id].addr); 10943 data->link[link_id].conn = 10944 ieee80211_conn_settings_unlimited; 10945 sband = 10946 local->hw.wiphy->bands[link_cbss->channel->band]; 10947 10948 ieee80211_determine_our_sta_mode(sdata, sband, 10949 NULL, true, link_id, 10950 &data->link[link_id].conn); 10951 10952 data->link[link_id].bss = link_cbss; 10953 data->link[link_id].elems = 10954 (u8 *)req->add_links[link_id].elems; 10955 data->link[link_id].elems_len = 10956 req->add_links[link_id].elems_len; 10957 10958 if (!bss->uapsd_supported) 10959 uapsd_supported = false; 10960 10961 if (data->link[link_id].conn.mode < 10962 IEEE80211_CONN_MODE_EHT) { 10963 err = -EINVAL; 10964 goto err_free; 10965 } 10966 10967 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10968 link_id); 10969 if (err) { 10970 err = -EINVAL; 10971 goto err_free; 10972 } 10973 } 10974 10975 /* Require U-APSD support if we enabled it */ 10976 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10977 !uapsd_supported) { 10978 err = -EINVAL; 10979 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10980 goto err_free; 10981 } 10982 10983 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10984 link_id++) { 10985 if (!data->link[link_id].bss) 10986 continue; 10987 10988 /* only used to verify the mode, nothing is allocated */ 10989 err = ieee80211_prep_channel(sdata, NULL, link_id, 10990 data->link[link_id].bss, 10991 true, 10992 &data->link[link_id].conn, 10993 sdata->u.mgd.userspace_selectors); 10994 if (err) 10995 goto err_free; 10996 } 10997 } 10998 10999 /* link removal is done before the ML reconfiguration frame exchange so 11000 * that these links will not be used between their removal by the AP MLD 11001 * and before the station got the ML reconfiguration response. Based on 11002 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 11003 * link removal request. 11004 */ 11005 if (req->rem_links) { 11006 u16 new_active_links = 11007 sdata->vif.active_links & ~req->rem_links; 11008 11009 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 11010 11011 /* Should not be left with no valid links to perform the 11012 * ML reconfiguration 11013 */ 11014 if (!new_valid_links || 11015 !(new_valid_links & ~sdata->vif.dormant_links)) { 11016 sdata_info(sdata, "mlo: reconf: no valid links\n"); 11017 err = -EINVAL; 11018 goto err_free; 11019 } 11020 11021 if (new_active_links != sdata->vif.active_links) { 11022 if (!new_active_links) 11023 new_active_links = 11024 BIT(__ffs(new_valid_links & 11025 ~sdata->vif.dormant_links)); 11026 11027 err = ieee80211_set_active_links(&sdata->vif, 11028 new_active_links); 11029 if (err) { 11030 sdata_info(sdata, 11031 "mlo: reconf: failed set active links\n"); 11032 goto err_free; 11033 } 11034 } 11035 } 11036 11037 /* Build the SKB before the link removal as the construction of the 11038 * station info for removed links requires the local address. 11039 * Invalidate the removed links, so that the transmission of the ML 11040 * reconfiguration request frame would not be done using them, as the AP 11041 * is expected to send the ML reconfiguration response frame on the link 11042 * on which the request was received. 11043 */ 11044 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 11045 cpu_to_le16(req->ext_mld_capa_ops)); 11046 if (!skb) { 11047 err = -ENOMEM; 11048 goto err_free; 11049 } 11050 11051 if (req->rem_links) { 11052 u16 new_dormant_links = 11053 sdata->vif.dormant_links & ~req->rem_links; 11054 11055 err = ieee80211_vif_set_links(sdata, new_valid_links, 11056 new_dormant_links); 11057 if (err) { 11058 sdata_info(sdata, 11059 "mlo: reconf: failed set valid links\n"); 11060 kfree_skb(skb); 11061 goto err_free; 11062 } 11063 11064 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 11065 link_id++) { 11066 if (!(req->rem_links & BIT(link_id))) 11067 continue; 11068 11069 ieee80211_sta_remove_link(sta, link_id); 11070 } 11071 11072 /* notify the driver and upper layers */ 11073 ieee80211_vif_cfg_change_notify(sdata, 11074 BSS_CHANGED_MLD_VALID_LINKS); 11075 cfg80211_links_removed(sdata->dev, req->rem_links); 11076 } 11077 11078 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 11079 added_links, req->rem_links); 11080 11081 ieee80211_tx_skb(sdata, skb); 11082 11083 sdata->u.mgd.reconf.added_links = added_links; 11084 sdata->u.mgd.reconf.add_links_data = data; 11085 sdata->u.mgd.reconf.removed_links = req->rem_links; 11086 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 11087 &sdata->u.mgd.reconf.wk, 11088 IEEE80211_ASSOC_TIMEOUT_SHORT); 11089 return 0; 11090 11091 err_free: 11092 kfree(data); 11093 return err; 11094 } 11095 11096 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 11097 { 11098 unsigned long valid_links = sdata->vif.valid_links; 11099 u8 link_id; 11100 11101 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11102 11103 if (!ieee80211_vif_is_mld(&sdata->vif)) 11104 return false; 11105 11106 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 11107 struct ieee80211_bss_conf *bss_conf = 11108 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 11109 11110 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 11111 return false; 11112 } 11113 11114 return true; 11115 } 11116 11117 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 11118 { 11119 struct ieee80211_local *local = sdata->local; 11120 struct ieee80211_mgmt *mgmt; 11121 struct sk_buff *skb; 11122 int frame_len = offsetofend(struct ieee80211_mgmt, 11123 u.action.u.epcs) + (enable ? 1 : 0); 11124 11125 if (!ieee80211_mgd_epcs_supp(sdata)) 11126 return -EINVAL; 11127 11128 if (sdata->u.mgd.epcs.enabled == enable && 11129 !sdata->u.mgd.epcs.dialog_token) 11130 return 0; 11131 11132 /* Do not allow enabling EPCS if the AP didn't respond yet. 11133 * However, allow disabling EPCS in such a case. 11134 */ 11135 if (sdata->u.mgd.epcs.dialog_token && enable) 11136 return -EALREADY; 11137 11138 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 11139 if (!skb) 11140 return -ENOBUFS; 11141 11142 skb_reserve(skb, local->hw.extra_tx_headroom); 11143 mgmt = skb_put_zero(skb, frame_len); 11144 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 11145 IEEE80211_STYPE_ACTION); 11146 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 11147 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 11148 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 11149 11150 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 11151 if (enable) { 11152 u8 *pos = mgmt->u.action.u.epcs.variable; 11153 11154 mgmt->u.action.u.epcs.action_code = 11155 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 11156 11157 *pos = ++sdata->u.mgd.dialog_token_alloc; 11158 sdata->u.mgd.epcs.dialog_token = *pos; 11159 } else { 11160 mgmt->u.action.u.epcs.action_code = 11161 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 11162 11163 ieee80211_epcs_teardown(sdata); 11164 ieee80211_epcs_changed(sdata, false); 11165 } 11166 11167 ieee80211_tx_skb(sdata, skb); 11168 return 0; 11169 } 11170 11171 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 11172 struct ieee802_11_elems *elems) 11173 { 11174 const struct element *sub; 11175 size_t scratch_len = elems->ml_epcs_len; 11176 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 11177 11178 lockdep_assert_wiphy(sdata->local->hw.wiphy); 11179 11180 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 11181 return; 11182 11183 if (WARN_ON(!scratch)) 11184 return; 11185 11186 /* Directly parse the sub elements as the common information doesn't 11187 * hold any useful information. 11188 */ 11189 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 11190 elems->ml_epcs_len) { 11191 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 11192 struct ieee80211_link_data *link; 11193 u8 *pos = (void *)sub->data; 11194 u16 control; 11195 ssize_t len; 11196 u8 link_id; 11197 11198 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 11199 continue; 11200 11201 if (sub->datalen < sizeof(control)) 11202 break; 11203 11204 control = get_unaligned_le16(pos); 11205 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 11206 11207 link = sdata_dereference(sdata->link[link_id], sdata); 11208 if (!link) 11209 continue; 11210 11211 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 11212 elems->ml_epcs_len, 11213 scratch, scratch_len, 11214 IEEE80211_MLE_SUBELEM_FRAGMENT); 11215 if (len < (ssize_t)sizeof(control)) 11216 continue; 11217 11218 pos = scratch + sizeof(control); 11219 len -= sizeof(control); 11220 11221 link_elems = ieee802_11_parse_elems(pos, len, 11222 IEEE80211_FTYPE_MGMT | 11223 IEEE80211_STYPE_ACTION, 11224 NULL); 11225 if (!link_elems) 11226 continue; 11227 11228 if (ieee80211_sta_wmm_params(sdata->local, link, 11229 link_elems->wmm_param, 11230 link_elems->wmm_param_len, 11231 link_elems->mu_edca_param_set)) 11232 ieee80211_link_info_change_notify(sdata, link, 11233 BSS_CHANGED_QOS); 11234 } 11235 } 11236 11237 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11238 struct ieee80211_mgmt *mgmt, size_t len) 11239 { 11240 struct ieee802_11_elems *elems __free(kfree) = NULL; 11241 size_t ies_len; 11242 u16 status_code; 11243 u8 *pos, dialog_token; 11244 11245 if (!ieee80211_mgd_epcs_supp(sdata)) 11246 return; 11247 11248 /* Handle dialog token and status code */ 11249 pos = mgmt->u.action.u.epcs.variable; 11250 dialog_token = *pos; 11251 status_code = get_unaligned_le16(pos + 1); 11252 11253 /* An EPCS enable response with dialog token == 0 is an unsolicited 11254 * notification from the AP MLD. In such a case, EPCS should already be 11255 * enabled and status must be success 11256 */ 11257 if (!dialog_token && 11258 (!sdata->u.mgd.epcs.enabled || 11259 status_code != WLAN_STATUS_SUCCESS)) 11260 return; 11261 11262 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11263 return; 11264 11265 sdata->u.mgd.epcs.dialog_token = 0; 11266 11267 if (status_code != WLAN_STATUS_SUCCESS) 11268 return; 11269 11270 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11271 ies_len = len - offsetof(struct ieee80211_mgmt, 11272 u.action.u.epcs.variable) - 11273 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11274 11275 elems = ieee802_11_parse_elems(pos, ies_len, 11276 IEEE80211_FTYPE_MGMT | 11277 IEEE80211_STYPE_ACTION, 11278 NULL); 11279 if (!elems) 11280 return; 11281 11282 ieee80211_ml_epcs(sdata, elems); 11283 ieee80211_epcs_changed(sdata, true); 11284 } 11285 11286 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11287 struct ieee80211_mgmt *mgmt, size_t len) 11288 { 11289 if (!ieee80211_vif_is_mld(&sdata->vif) || 11290 !sdata->u.mgd.epcs.enabled) 11291 return; 11292 11293 ieee80211_epcs_teardown(sdata); 11294 ieee80211_epcs_changed(sdata, false); 11295 } 11296