1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2025 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS (100 * USEC_PER_MSEC) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 172 ignore_ht_channel_mismatch = false; 173 174 *chandef = (struct cfg80211_chan_def) { 175 .chan = channel, 176 .width = NL80211_CHAN_WIDTH_20_NOHT, 177 .center_freq1 = channel->center_freq, 178 .freq1_offset = channel->freq_offset, 179 }; 180 181 /* get special S1G case out of the way */ 182 if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(sdata->local, elems->s1g_oper, 184 chandef)) { 185 /* Fallback to default 1MHz */ 186 chandef->width = NL80211_CHAN_WIDTH_1; 187 chandef->s1g_primary_2mhz = false; 188 } 189 190 return IEEE80211_CONN_MODE_S1G; 191 } 192 193 /* get special 6 GHz case out of the way */ 194 if (sband->band == NL80211_BAND_6GHZ) { 195 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 196 197 /* this is an error */ 198 if (conn->mode < IEEE80211_CONN_MODE_HE) 199 return IEEE80211_CONN_MODE_LEGACY; 200 201 if (!elems->he_6ghz_capa || !elems->he_cap) { 202 sdata_info(sdata, 203 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 204 return IEEE80211_CONN_MODE_LEGACY; 205 } 206 207 if (!eht_oper || !elems->eht_cap) { 208 eht_oper = NULL; 209 mode = IEEE80211_CONN_MODE_HE; 210 } 211 212 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 213 eht_oper, chandef)) { 214 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 215 return IEEE80211_CONN_MODE_LEGACY; 216 } 217 218 return mode; 219 } 220 221 /* now we have the progression HT, VHT, ... */ 222 if (conn->mode < IEEE80211_CONN_MODE_HT) 223 return IEEE80211_CONN_MODE_LEGACY; 224 225 if (!ht_oper || !elems->ht_cap_elem) 226 return IEEE80211_CONN_MODE_LEGACY; 227 228 chandef->width = NL80211_CHAN_WIDTH_20; 229 230 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 231 channel->band); 232 /* check that channel matches the right operating channel */ 233 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 234 /* 235 * It's possible that some APs are confused here; 236 * Netgear WNDR3700 sometimes reports 4 higher than 237 * the actual channel in association responses, but 238 * since we look at probe response/beacon data here 239 * it should be OK. 240 */ 241 sdata_info(sdata, 242 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 243 channel->center_freq, ht_cfreq, 244 ht_oper->primary_chan, channel->band); 245 return IEEE80211_CONN_MODE_LEGACY; 246 } 247 248 ieee80211_chandef_ht_oper(ht_oper, chandef); 249 250 if (conn->mode < IEEE80211_CONN_MODE_VHT) 251 return IEEE80211_CONN_MODE_HT; 252 253 vht_chandef = *chandef; 254 255 /* 256 * having he_cap/he_oper parsed out implies we're at 257 * least operating as HE STA 258 */ 259 if (elems->he_cap && he_oper && 260 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 261 struct ieee80211_vht_operation he_oper_vht_cap; 262 263 /* 264 * Set only first 3 bytes (other 2 aren't used in 265 * ieee80211_chandef_vht_oper() anyway) 266 */ 267 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 268 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 269 270 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 271 &he_oper_vht_cap, ht_oper, 272 &vht_chandef)) { 273 sdata_info(sdata, 274 "HE AP VHT information is invalid, disabling HE\n"); 275 /* this will cause us to re-parse as VHT STA */ 276 return IEEE80211_CONN_MODE_VHT; 277 } 278 } else if (!vht_oper || !elems->vht_cap_elem) { 279 if (sband->band == NL80211_BAND_5GHZ) 280 return IEEE80211_CONN_MODE_HT; 281 no_vht = true; 282 } else if (sband->band == NL80211_BAND_2GHZ) { 283 no_vht = true; 284 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 285 vht_cap_info, 286 vht_oper, ht_oper, 287 &vht_chandef)) { 288 sdata_info(sdata, 289 "AP VHT information is invalid, disabling VHT\n"); 290 return IEEE80211_CONN_MODE_HT; 291 } 292 293 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 294 sdata_info(sdata, 295 "AP VHT information doesn't match HT, disabling VHT\n"); 296 return IEEE80211_CONN_MODE_HT; 297 } 298 299 *chandef = vht_chandef; 300 301 /* stick to current max mode if we or the AP don't have HE */ 302 if (conn->mode < IEEE80211_CONN_MODE_HE || 303 !elems->he_operation || !elems->he_cap) { 304 if (no_vht) 305 return IEEE80211_CONN_MODE_HT; 306 return IEEE80211_CONN_MODE_VHT; 307 } 308 309 /* stick to HE if we or the AP don't have EHT */ 310 if (conn->mode < IEEE80211_CONN_MODE_EHT || 311 !eht_oper || !elems->eht_cap) 312 return IEEE80211_CONN_MODE_HE; 313 314 /* 315 * handle the case that the EHT operation indicates that it holds EHT 316 * operation information (in case that the channel width differs from 317 * the channel width reported in HT/VHT/HE). 318 */ 319 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 320 struct cfg80211_chan_def eht_chandef = *chandef; 321 322 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 323 &eht_chandef); 324 325 eht_chandef.punctured = 326 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 327 328 if (!cfg80211_chandef_valid(&eht_chandef)) { 329 sdata_info(sdata, 330 "AP EHT information is invalid, disabling EHT\n"); 331 return IEEE80211_CONN_MODE_HE; 332 } 333 334 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 335 sdata_info(sdata, 336 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 337 return IEEE80211_CONN_MODE_HE; 338 } 339 340 *chandef = eht_chandef; 341 } 342 343 return IEEE80211_CONN_MODE_EHT; 344 } 345 346 static bool 347 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 348 struct ieee80211_supported_band *sband, 349 const struct ieee80211_ht_operation *ht_op) 350 { 351 struct ieee80211_sta_ht_cap sta_ht_cap; 352 int i; 353 354 if (sband->band == NL80211_BAND_6GHZ) 355 return true; 356 357 if (!ht_op) 358 return false; 359 360 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 361 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 362 363 /* 364 * P802.11REVme/D7.0 - 6.5.4.2.4 365 * ... 366 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 367 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 368 * in the HT Operation parameter that contains any unsupported MCSs, 369 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 370 * contain a ResultCode parameter that is not set to the value SUCCESS. 371 * ... 372 */ 373 374 /* Simply check that all basic rates are in the STA RX mask */ 375 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 376 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 377 ht_op->basic_set[i]) 378 return false; 379 } 380 381 return true; 382 } 383 384 static bool 385 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 386 int link_id, 387 struct ieee80211_supported_band *sband, 388 const struct ieee80211_vht_operation *vht_op) 389 { 390 struct ieee80211_sta_vht_cap sta_vht_cap; 391 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 392 int nss; 393 394 if (sband->band != NL80211_BAND_5GHZ) 395 return true; 396 397 if (!vht_op) 398 return false; 399 400 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 401 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 402 403 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 404 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 405 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 406 407 /* 408 * Many APs are incorrectly advertising an all-zero value here, 409 * which really means MCS 0-7 are required for 1-8 streams, but 410 * they don't really mean it that way. 411 * Some other APs are incorrectly advertising 3 spatial streams 412 * with MCS 0-7 are required, but don't really mean it that way 413 * and we'll connect only with HT, rather than even HE. 414 * As a result, unfortunately the VHT basic MCS/NSS set cannot 415 * be used at all, so check it only in strict mode. 416 */ 417 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 418 return true; 419 420 /* 421 * P802.11REVme/D7.0 - 6.5.4.2.4 422 * ... 423 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 424 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 425 * field in the VHT Operation parameter that contains any unsupported 426 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 427 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 428 * that is not set to the value SUCCESS. 429 * ... 430 */ 431 for (nss = 8; nss > 0; nss--) { 432 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 433 u8 sta_rx_val; 434 u8 sta_tx_val; 435 436 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 437 continue; 438 439 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 440 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 441 442 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 443 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 444 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 445 link_id_info(sdata, link_id, 446 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 447 nss, sta_rx_val, sta_tx_val, ap_op_val); 448 return false; 449 } 450 } 451 452 return true; 453 } 454 455 static bool 456 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 457 int link_id, 458 const struct ieee80211_he_cap_elem *he_cap, 459 const struct ieee80211_he_operation *he_op) 460 { 461 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 462 u16 mcs_80_map_tx, mcs_80_map_rx; 463 u16 ap_min_req_set; 464 int nss; 465 466 if (!he_cap) 467 return false; 468 469 /* mcs_nss is right after he_cap info */ 470 he_mcs_nss_supp = (void *)(he_cap + 1); 471 472 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 473 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 474 475 /* P802.11-REVme/D0.3 476 * 27.1.1 Introduction to the HE PHY 477 * ... 478 * An HE STA shall support the following features: 479 * ... 480 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 481 * supported channel widths for HE SU PPDUs 482 */ 483 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 484 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 485 link_id_info(sdata, link_id, 486 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 487 mcs_80_map_tx, mcs_80_map_rx); 488 return false; 489 } 490 491 if (!he_op) 492 return true; 493 494 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 495 496 /* 497 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 498 * zeroes, which is nonsense, and completely inconsistent with itself 499 * (it doesn't have 8 streams). Accept the settings in this case anyway. 500 */ 501 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 502 return true; 503 504 /* make sure the AP is consistent with itself 505 * 506 * P802.11-REVme/D0.3 507 * 26.17.1 Basic HE BSS operation 508 * 509 * A STA that is operating in an HE BSS shall be able to receive and 510 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 511 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 512 * MLME-START.request primitive and shall be able to receive at each of 513 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 514 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 515 * primitive 516 */ 517 for (nss = 8; nss > 0; nss--) { 518 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 519 u8 ap_rx_val; 520 u8 ap_tx_val; 521 522 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 523 continue; 524 525 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 526 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 527 528 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 529 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 530 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 531 link_id_info(sdata, link_id, 532 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 533 nss, ap_rx_val, ap_tx_val, ap_op_val); 534 return false; 535 } 536 } 537 538 return true; 539 } 540 541 static bool 542 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 543 struct ieee80211_supported_band *sband, 544 const struct ieee80211_he_operation *he_op) 545 { 546 const struct ieee80211_sta_he_cap *sta_he_cap = 547 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 548 u16 ap_min_req_set; 549 int i; 550 551 if (!sta_he_cap || !he_op) 552 return false; 553 554 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 555 556 /* 557 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 558 * zeroes, which is nonsense, and completely inconsistent with itself 559 * (it doesn't have 8 streams). Accept the settings in this case anyway. 560 */ 561 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 562 return true; 563 564 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 565 for (i = 0; i < 3; i++) { 566 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 567 &sta_he_cap->he_mcs_nss_supp; 568 u16 sta_mcs_map_rx = 569 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 570 u16 sta_mcs_map_tx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 572 u8 nss; 573 bool verified = true; 574 575 /* 576 * For each band there is a maximum of 8 spatial streams 577 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 578 * of 2 bits per NSS (1-8), with the values defined in enum 579 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 580 * capabilities aren't less than the AP's minimum requirements 581 * for this HE BSS per SS. 582 * It is enough to find one such band that meets the reqs. 583 */ 584 for (nss = 8; nss > 0; nss--) { 585 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 586 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 587 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 588 589 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 590 continue; 591 592 /* 593 * Make sure the HE AP doesn't require MCSs that aren't 594 * supported by the client as required by spec 595 * 596 * P802.11-REVme/D0.3 597 * 26.17.1 Basic HE BSS operation 598 * 599 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 600 * a BSS, unless it supports (i.e., is able to both transmit and 601 * receive using) all of the <HE-MCS, NSS> tuples in the basic 602 * HE-MCS and NSS set. 603 */ 604 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 605 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 606 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 607 verified = false; 608 break; 609 } 610 } 611 612 if (verified) 613 return true; 614 } 615 616 /* If here, STA doesn't meet AP's HE min requirements */ 617 return false; 618 } 619 620 static u8 621 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 622 const struct ieee80211_sta_eht_cap *sta_eht_cap, 623 unsigned int idx, int bw) 624 { 625 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 626 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 627 628 /* handle us being a 20 MHz-only EHT STA - with four values 629 * for MCS 0-7, 8-9, 10-11, 12-13. 630 */ 631 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 632 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 633 634 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 635 if (idx > 0) 636 idx--; 637 638 switch (bw) { 639 case 0: 640 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 641 case 1: 642 if (!(he_phy_cap0 & 643 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 644 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 645 return 0xff; /* pass check */ 646 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 647 case 2: 648 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 649 return 0xff; /* pass check */ 650 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 651 } 652 653 WARN_ON(1); 654 return 0; 655 } 656 657 static bool 658 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 659 struct ieee80211_supported_band *sband, 660 const struct ieee80211_eht_operation *eht_op) 661 { 662 const struct ieee80211_sta_he_cap *sta_he_cap = 663 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 664 const struct ieee80211_sta_eht_cap *sta_eht_cap = 665 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 667 unsigned int i; 668 669 if (!sta_he_cap || !sta_eht_cap || !eht_op) 670 return false; 671 672 req = &eht_op->basic_mcs_nss; 673 674 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 675 u8 req_rx_nss, req_tx_nss; 676 unsigned int bw; 677 678 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 679 IEEE80211_EHT_MCS_NSS_RX); 680 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_TX); 682 683 for (bw = 0; bw < 3; bw++) { 684 u8 have, have_rx_nss, have_tx_nss; 685 686 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 687 sta_eht_cap, 688 i, bw); 689 have_rx_nss = u8_get_bits(have, 690 IEEE80211_EHT_MCS_NSS_RX); 691 have_tx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_TX); 693 694 if (req_rx_nss > have_rx_nss || 695 req_tx_nss > have_tx_nss) 696 return false; 697 } 698 } 699 700 return true; 701 } 702 703 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 704 const u8 *supp_rates, 705 unsigned int supp_rates_len, 706 const u8 *ext_supp_rates, 707 unsigned int ext_supp_rates_len, 708 u32 *rates, u32 *basic_rates, 709 unsigned long *unknown_rates_selectors, 710 bool *have_higher_than_11mbit, 711 int *min_rate, int *min_rate_index) 712 { 713 int i, j; 714 715 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 716 u8 supp_rate = i < supp_rates_len ? 717 supp_rates[i] : 718 ext_supp_rates[i - supp_rates_len]; 719 int rate = supp_rate & 0x7f; 720 bool is_basic = !!(supp_rate & 0x80); 721 722 if ((rate * 5) > 110 && have_higher_than_11mbit) 723 *have_higher_than_11mbit = true; 724 725 /* 726 * Skip membership selectors since they're not rates. 727 * 728 * Note: Even though the membership selector and the basic 729 * rate flag share the same bit, they are not exactly 730 * the same. 731 */ 732 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 733 if (unknown_rates_selectors) 734 set_bit(rate, unknown_rates_selectors); 735 continue; 736 } 737 738 for (j = 0; j < sband->n_bitrates; j++) { 739 struct ieee80211_rate *br; 740 int brate; 741 742 br = &sband->bitrates[j]; 743 744 brate = DIV_ROUND_UP(br->bitrate, 5); 745 if (brate == rate) { 746 if (rates) 747 *rates |= BIT(j); 748 if (is_basic && basic_rates) 749 *basic_rates |= BIT(j); 750 if (min_rate && (rate * 5) < *min_rate) { 751 *min_rate = rate * 5; 752 if (min_rate_index) 753 *min_rate_index = j; 754 } 755 break; 756 } 757 } 758 759 /* Handle an unknown entry as if it is an unknown selector */ 760 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 761 set_bit(rate, unknown_rates_selectors); 762 } 763 } 764 765 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 766 const struct cfg80211_chan_def *chandef, 767 u32 prohibited_flags) 768 { 769 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 770 chandef, prohibited_flags)) 771 return false; 772 773 if (chandef->punctured && 774 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 775 return false; 776 777 return true; 778 } 779 780 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 781 { 782 if (c->width == NL80211_CHAN_WIDTH_80P80) 783 return 4 + 4; 784 785 return cfg80211_chandef_get_width(c) / 20; 786 } 787 788 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 789 { 790 switch (c->width) { 791 case NL80211_CHAN_WIDTH_20: 792 case NL80211_CHAN_WIDTH_20_NOHT: 793 return 1; 794 case NL80211_CHAN_WIDTH_40: 795 return 2; 796 case NL80211_CHAN_WIDTH_80P80: 797 case NL80211_CHAN_WIDTH_80: 798 return 3; 799 case NL80211_CHAN_WIDTH_160: 800 return 4; 801 case NL80211_CHAN_WIDTH_320: 802 return 5; 803 default: 804 WARN_ON(1); 805 return 0; 806 } 807 } 808 809 VISIBLE_IF_MAC80211_KUNIT int 810 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 811 u8 n_partial_subchans) 812 { 813 int n = ieee80211_chandef_num_subchans(ap); 814 struct cfg80211_chan_def tmp = *ap; 815 int offset = 0; 816 817 /* 818 * Given a chandef (in this context, it's the AP's) and a number 819 * of subchannels that we want to look at ('n_partial_subchans'), 820 * calculate the offset in number of subchannels between the full 821 * and the subset with the desired width. 822 */ 823 824 /* same number of subchannels means no offset, obviously */ 825 if (n == n_partial_subchans) 826 return 0; 827 828 /* don't WARN - misconfigured APs could cause this if their N > width */ 829 if (n < n_partial_subchans) 830 return 0; 831 832 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 833 u32 prev = tmp.center_freq1; 834 835 ieee80211_chandef_downgrade(&tmp, NULL); 836 837 /* 838 * if center_freq moved up, half the original channels 839 * are gone now but were below, so increase offset 840 */ 841 if (prev < tmp.center_freq1) 842 offset += ieee80211_chandef_num_subchans(&tmp); 843 } 844 845 /* 846 * 80+80 with secondary 80 below primary - four subchannels for it 847 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 848 */ 849 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 850 ap->center_freq2 < ap->center_freq1) 851 offset += 4; 852 853 return offset; 854 } 855 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 856 857 VISIBLE_IF_MAC80211_KUNIT void 858 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 859 const struct cfg80211_chan_def *ap, 860 const struct cfg80211_chan_def *used) 861 { 862 u8 needed = ieee80211_chandef_num_subchans(used); 863 u8 have = ieee80211_chandef_num_subchans(ap); 864 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 865 u8 offset; 866 867 if (!psd->valid) 868 return; 869 870 /* if N is zero, all defaults were used, no point in rearranging */ 871 if (!psd->n) 872 goto out; 873 874 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 875 876 /* 877 * This assumes that 'N' is consistent with the HE channel, as 878 * it should be (otherwise the AP is broken). 879 * 880 * In psd->power we have values in the order 0..N, 0..K, where 881 * N+K should cover the entire channel per 'ap', but even if it 882 * doesn't then we've pre-filled 'unlimited' as defaults. 883 * 884 * But this is all the wrong order, we want to have them in the 885 * order of the 'used' channel. 886 * 887 * So for example, we could have a 320 MHz EHT AP, which has the 888 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 889 * seem to be considered for the TPE), as follows: 890 * 891 * EHT 320: | | | | | | | | | | | | | | | | | 892 * HE 80: | | | | | 893 * used 160: | | | | | | | | | 894 * 895 * N entries: |--|--|--|--| 896 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 897 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 898 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 899 * used chan: 0 1 2 3 4 5 6 7 900 * 901 * The idx in the power array ('power idx') is like this since it 902 * comes directly from the element's N and K entries in their 903 * element order, and those are this way for HE compatibility. 904 * 905 * Rearrange them as desired here, first by putting them into the 906 * 'full chan' order, and then selecting the necessary subset for 907 * the 'used chan'. 908 */ 909 910 /* first reorder according to AP channel */ 911 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 912 for (int i = 0; i < have; i++) { 913 if (i < offset) 914 tmp[i] = psd->power[i + psd->n]; 915 else if (i < offset + psd->n) 916 tmp[i] = psd->power[i - offset]; 917 else 918 tmp[i] = psd->power[i]; 919 } 920 921 /* 922 * and then select the subset for the used channel 923 * (set everything to defaults first in case a driver is confused) 924 */ 925 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 926 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 927 for (int i = 0; i < needed; i++) 928 psd->power[i] = tmp[offset + i]; 929 930 out: 931 /* limit, but don't lie if there are defaults in the data */ 932 if (needed < psd->count) 933 psd->count = needed; 934 } 935 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 936 937 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 938 const struct cfg80211_chan_def *ap, 939 const struct cfg80211_chan_def *used) 940 { 941 /* ignore this completely for narrow/invalid channels */ 942 if (!ieee80211_chandef_num_subchans(ap) || 943 !ieee80211_chandef_num_subchans(used)) { 944 ieee80211_clear_tpe(tpe); 945 return; 946 } 947 948 for (int i = 0; i < 2; i++) { 949 int needed_pwr_count; 950 951 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 952 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 953 954 /* limit this to the widths we actually need */ 955 needed_pwr_count = ieee80211_chandef_num_widths(used); 956 if (needed_pwr_count < tpe->max_local[i].count) 957 tpe->max_local[i].count = needed_pwr_count; 958 if (needed_pwr_count < tpe->max_reg_client[i].count) 959 tpe->max_reg_client[i].count = needed_pwr_count; 960 } 961 } 962 963 /* 964 * The AP part of the channel request is used to distinguish settings 965 * to the device used for wider bandwidth OFDMA. This is used in the 966 * channel context code to assign two channel contexts even if they're 967 * both for the same channel, if the AP bandwidths are incompatible. 968 * If not EHT (or driver override) then ap.chan == NULL indicates that 969 * there's no wider BW OFDMA used. 970 */ 971 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 972 struct ieee80211_chan_req *chanreq, 973 struct ieee80211_conn_settings *conn, 974 struct cfg80211_chan_def *ap_chandef) 975 { 976 chanreq->ap.chan = NULL; 977 978 if (conn->mode < IEEE80211_CONN_MODE_EHT) 979 return; 980 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 981 return; 982 983 chanreq->ap = *ap_chandef; 984 } 985 986 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 987 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 988 struct ieee80211_conn_settings *conn, 989 struct cfg80211_bss *cbss, int link_id, 990 struct ieee80211_chan_req *chanreq, 991 struct cfg80211_chan_def *ap_chandef, 992 unsigned long *userspace_selectors) 993 { 994 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 995 struct ieee80211_bss *bss = (void *)cbss->priv; 996 struct ieee80211_channel *channel = cbss->channel; 997 struct ieee80211_elems_parse_params parse_params = { 998 .link_id = -1, 999 .from_ap = true, 1000 .start = ies->data, 1001 .len = ies->len, 1002 .type = ies->from_beacon ? 1003 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_BEACON : 1004 IEEE80211_FTYPE_MGMT | IEEE80211_STYPE_PROBE_RESP, 1005 }; 1006 struct ieee802_11_elems *elems; 1007 struct ieee80211_supported_band *sband; 1008 enum ieee80211_conn_mode ap_mode; 1009 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1010 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1011 int ret; 1012 1013 again: 1014 parse_params.mode = conn->mode; 1015 elems = ieee802_11_parse_elems_full(&parse_params); 1016 if (!elems) 1017 return ERR_PTR(-ENOMEM); 1018 1019 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1020 elems, false, conn, ap_chandef); 1021 1022 /* this should be impossible since parsing depends on our mode */ 1023 if (WARN_ON(ap_mode > conn->mode)) { 1024 ret = -EINVAL; 1025 goto free; 1026 } 1027 1028 if (conn->mode != ap_mode) { 1029 conn->mode = ap_mode; 1030 kfree(elems); 1031 goto again; 1032 } 1033 1034 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1035 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1036 1037 sband = sdata->local->hw.wiphy->bands[channel->band]; 1038 1039 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1040 elems->ext_supp_rates, elems->ext_supp_rates_len, 1041 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1042 NULL); 1043 1044 switch (channel->band) { 1045 case NL80211_BAND_S1GHZ: 1046 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1047 ret = -EINVAL; 1048 goto free; 1049 } 1050 1051 chanreq->oper = *ap_chandef; 1052 if (!cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1053 IEEE80211_CHAN_DISABLED)) { 1054 ret = -EINVAL; 1055 goto free; 1056 } 1057 1058 return elems; 1059 case NL80211_BAND_6GHZ: 1060 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1061 link_id_info(sdata, link_id, 1062 "Rejecting non-HE 6/7 GHz connection"); 1063 ret = -EINVAL; 1064 goto free; 1065 } 1066 break; 1067 default: 1068 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1069 ret = -EINVAL; 1070 goto free; 1071 } 1072 } 1073 1074 switch (ap_mode) { 1075 case IEEE80211_CONN_MODE_S1G: 1076 WARN_ON(1); 1077 ret = -EINVAL; 1078 goto free; 1079 case IEEE80211_CONN_MODE_LEGACY: 1080 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1081 break; 1082 case IEEE80211_CONN_MODE_HT: 1083 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1084 conn->bw_limit, 1085 IEEE80211_CONN_BW_LIMIT_40); 1086 break; 1087 case IEEE80211_CONN_MODE_VHT: 1088 case IEEE80211_CONN_MODE_HE: 1089 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1090 conn->bw_limit, 1091 IEEE80211_CONN_BW_LIMIT_160); 1092 break; 1093 case IEEE80211_CONN_MODE_EHT: 1094 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1095 conn->bw_limit, 1096 IEEE80211_CONN_BW_LIMIT_320); 1097 break; 1098 } 1099 1100 chanreq->oper = *ap_chandef; 1101 1102 bitmap_copy(sta_selectors, userspace_selectors, 128); 1103 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1104 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1105 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1106 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1107 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1108 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1109 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1110 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1111 1112 /* 1113 * We do not support EPD or GLK so never add them. 1114 * SAE_H2E is handled through userspace_selectors. 1115 */ 1116 1117 /* Check if we support all required features */ 1118 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1119 link_id_info(sdata, link_id, 1120 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1121 ret = -EINVAL; 1122 goto free; 1123 } 1124 1125 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1126 1127 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1128 IEEE80211_CHAN_DISABLED)) { 1129 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1130 ret = -EINVAL; 1131 goto free; 1132 } 1133 1134 ieee80211_chanreq_downgrade(chanreq, conn); 1135 } 1136 1137 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1138 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1139 IEEE80211_CHAN_NO_HE)) { 1140 conn->mode = IEEE80211_CONN_MODE_VHT; 1141 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1142 conn->bw_limit, 1143 IEEE80211_CONN_BW_LIMIT_160); 1144 } 1145 1146 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1147 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1148 IEEE80211_CHAN_NO_EHT)) { 1149 conn->mode = IEEE80211_CONN_MODE_HE; 1150 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1151 conn->bw_limit, 1152 IEEE80211_CONN_BW_LIMIT_160); 1153 } 1154 1155 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1156 link_id_info(sdata, link_id, 1157 "regulatory prevented using AP config, downgraded\n"); 1158 1159 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1160 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1161 elems->ht_operation)) { 1162 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1163 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1164 link_id_info(sdata, link_id, 1165 "required MCSes not supported, disabling HT\n"); 1166 } 1167 1168 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1169 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1170 elems->vht_operation)) { 1171 conn->mode = IEEE80211_CONN_MODE_HT; 1172 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1173 conn->bw_limit, 1174 IEEE80211_CONN_BW_LIMIT_40); 1175 link_id_info(sdata, link_id, 1176 "required MCSes not supported, disabling VHT\n"); 1177 } 1178 1179 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1180 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1181 (void *)elems->he_cap, 1182 elems->he_operation) || 1183 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1184 elems->he_operation))) { 1185 conn->mode = IEEE80211_CONN_MODE_VHT; 1186 link_id_info(sdata, link_id, 1187 "required MCSes not supported, disabling HE\n"); 1188 } 1189 1190 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1191 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1192 elems->eht_operation)) { 1193 conn->mode = IEEE80211_CONN_MODE_HE; 1194 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1195 conn->bw_limit, 1196 IEEE80211_CONN_BW_LIMIT_160); 1197 link_id_info(sdata, link_id, 1198 "required MCSes not supported, disabling EHT\n"); 1199 } 1200 1201 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1202 channel->band != NL80211_BAND_2GHZ && 1203 conn->bw_limit == IEEE80211_CONN_BW_LIMIT_40) { 1204 conn->mode = IEEE80211_CONN_MODE_HE; 1205 link_id_info(sdata, link_id, 1206 "required bandwidth not supported, disabling EHT\n"); 1207 } 1208 1209 /* the mode can only decrease, so this must terminate */ 1210 if (ap_mode != conn->mode) { 1211 kfree(elems); 1212 goto again; 1213 } 1214 1215 mlme_link_id_dbg(sdata, link_id, 1216 "connecting with %s mode, max bandwidth %d MHz\n", 1217 ieee80211_conn_mode_str(conn->mode), 1218 20 * (1 << conn->bw_limit)); 1219 1220 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1221 ret = -EINVAL; 1222 goto free; 1223 } 1224 1225 return elems; 1226 free: 1227 kfree(elems); 1228 return ERR_PTR(ret); 1229 } 1230 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1231 1232 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1233 struct ieee802_11_elems *elems, 1234 bool update, u64 *changed, u16 stype) 1235 { 1236 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1237 struct ieee80211_sub_if_data *sdata = link->sdata; 1238 struct ieee80211_chan_req chanreq = {}; 1239 struct cfg80211_chan_def ap_chandef; 1240 enum ieee80211_conn_mode ap_mode; 1241 const char *frame; 1242 u32 vht_cap_info = 0; 1243 u16 ht_opmode; 1244 int ret; 1245 1246 switch (stype) { 1247 case IEEE80211_STYPE_BEACON: 1248 frame = "beacon"; 1249 break; 1250 case IEEE80211_STYPE_ASSOC_RESP: 1251 frame = "assoc response"; 1252 break; 1253 case IEEE80211_STYPE_REASSOC_RESP: 1254 frame = "reassoc response"; 1255 break; 1256 case IEEE80211_STYPE_ACTION: 1257 /* the only action frame that gets here */ 1258 frame = "ML reconf response"; 1259 break; 1260 default: 1261 return -EINVAL; 1262 } 1263 1264 /* don't track any bandwidth changes in legacy/S1G modes */ 1265 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1266 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1267 return 0; 1268 1269 if (elems->vht_cap_elem) 1270 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1271 1272 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1273 elems, true, &link->u.mgd.conn, 1274 &ap_chandef); 1275 1276 if (ap_mode != link->u.mgd.conn.mode) { 1277 link_info(link, 1278 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1279 link->u.mgd.bssid, 1280 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1281 ieee80211_conn_mode_str(ap_mode), frame); 1282 return -EINVAL; 1283 } 1284 1285 chanreq.oper = ap_chandef; 1286 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1287 &ap_chandef); 1288 1289 /* 1290 * if HT operation mode changed store the new one - 1291 * this may be applicable even if channel is identical 1292 */ 1293 if (elems->ht_operation) { 1294 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1295 if (link->conf->ht_operation_mode != ht_opmode) { 1296 *changed |= BSS_CHANGED_HT; 1297 link->conf->ht_operation_mode = ht_opmode; 1298 } 1299 } 1300 1301 /* 1302 * Downgrade the new channel if we associated with restricted 1303 * bandwidth capabilities. For example, if we associated as a 1304 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1305 * or config reasons) then switching to a 40 MHz channel now 1306 * won't do us any good -- we couldn't use it with the AP. 1307 */ 1308 while (link->u.mgd.conn.bw_limit < 1309 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1310 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1311 1312 /* TPE element is not present in (re)assoc/ML reconfig response */ 1313 if (stype == IEEE80211_STYPE_BEACON && 1314 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1315 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1316 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1317 &chanreq.oper); 1318 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1319 link->conf->tpe = elems->tpe; 1320 *changed |= BSS_CHANGED_TPE; 1321 } 1322 } 1323 1324 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1325 return 0; 1326 1327 link_info(link, 1328 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1329 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1330 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1331 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1332 chanreq.oper.center_freq2); 1333 1334 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1335 sdata_info(sdata, 1336 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1337 link->u.mgd.bssid, frame); 1338 return -EINVAL; 1339 } 1340 1341 if (!update) { 1342 link->conf->chanreq = chanreq; 1343 return 0; 1344 } 1345 1346 /* 1347 * We're tracking the current AP here, so don't do any further checks 1348 * here. This keeps us from playing ping-pong with regulatory, without 1349 * it the following can happen (for example): 1350 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1351 * - AP advertises regdom US 1352 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1353 * - we detect an unsupported channel and disconnect 1354 * - disconnect causes CRDA to reload world regdomain and the game 1355 * starts anew. 1356 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1357 * 1358 * It seems possible that there are still scenarios with CSA or real 1359 * bandwidth changes where a this could happen, but those cases are 1360 * less common and wouldn't completely prevent using the AP. 1361 */ 1362 1363 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1364 if (ret) { 1365 sdata_info(sdata, 1366 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1367 link->u.mgd.bssid, frame); 1368 return ret; 1369 } 1370 1371 cfg80211_schedule_channels_check(&sdata->wdev); 1372 return 0; 1373 } 1374 1375 /* frame sending functions */ 1376 1377 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1378 struct sk_buff *skb, u8 ap_ht_param, 1379 struct ieee80211_supported_band *sband, 1380 struct ieee80211_channel *channel, 1381 enum ieee80211_smps_mode smps, 1382 const struct ieee80211_conn_settings *conn) 1383 { 1384 u8 *pos; 1385 u32 flags = channel->flags; 1386 u16 cap; 1387 struct ieee80211_sta_ht_cap ht_cap; 1388 1389 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1390 1391 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1392 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1393 1394 /* determine capability flags */ 1395 cap = ht_cap.cap; 1396 1397 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1398 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1399 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1400 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1401 cap &= ~IEEE80211_HT_CAP_SGI_40; 1402 } 1403 break; 1404 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1405 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1406 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1407 cap &= ~IEEE80211_HT_CAP_SGI_40; 1408 } 1409 break; 1410 } 1411 1412 /* 1413 * If 40 MHz was disabled associate as though we weren't 1414 * capable of 40 MHz -- some broken APs will never fall 1415 * back to trying to transmit in 20 MHz. 1416 */ 1417 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1418 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1419 cap &= ~IEEE80211_HT_CAP_SGI_40; 1420 } 1421 1422 /* set SM PS mode properly */ 1423 cap &= ~IEEE80211_HT_CAP_SM_PS; 1424 switch (smps) { 1425 case IEEE80211_SMPS_AUTOMATIC: 1426 case IEEE80211_SMPS_NUM_MODES: 1427 WARN_ON(1); 1428 fallthrough; 1429 case IEEE80211_SMPS_OFF: 1430 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1431 IEEE80211_HT_CAP_SM_PS_SHIFT; 1432 break; 1433 case IEEE80211_SMPS_STATIC: 1434 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1435 IEEE80211_HT_CAP_SM_PS_SHIFT; 1436 break; 1437 case IEEE80211_SMPS_DYNAMIC: 1438 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1439 IEEE80211_HT_CAP_SM_PS_SHIFT; 1440 break; 1441 } 1442 1443 /* reserve and fill IE */ 1444 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1445 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1446 } 1447 1448 /* This function determines vht capability flags for the association 1449 * and builds the IE. 1450 * Note - the function returns true to own the MU-MIMO capability 1451 */ 1452 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1453 struct sk_buff *skb, 1454 struct ieee80211_supported_band *sband, 1455 struct ieee80211_vht_cap *ap_vht_cap, 1456 const struct ieee80211_conn_settings *conn) 1457 { 1458 struct ieee80211_local *local = sdata->local; 1459 u8 *pos; 1460 u32 cap; 1461 struct ieee80211_sta_vht_cap vht_cap; 1462 u32 mask, ap_bf_sts, our_bf_sts; 1463 bool mu_mimo_owner = false; 1464 1465 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1466 1467 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1468 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1469 1470 /* determine capability flags */ 1471 cap = vht_cap.cap; 1472 1473 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1474 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1475 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1476 } 1477 1478 /* 1479 * Some APs apparently get confused if our capabilities are better 1480 * than theirs, so restrict what we advertise in the assoc request. 1481 */ 1482 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1483 if (!(ap_vht_cap->vht_cap_info & 1484 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1485 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1486 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1487 else if (!(ap_vht_cap->vht_cap_info & 1488 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1489 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1490 } 1491 1492 /* 1493 * If some other vif is using the MU-MIMO capability we cannot associate 1494 * using MU-MIMO - this will lead to contradictions in the group-id 1495 * mechanism. 1496 * Ownership is defined since association request, in order to avoid 1497 * simultaneous associations with MU-MIMO. 1498 */ 1499 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1500 bool disable_mu_mimo = false; 1501 struct ieee80211_sub_if_data *other; 1502 1503 list_for_each_entry(other, &local->interfaces, list) { 1504 if (other->vif.bss_conf.mu_mimo_owner) { 1505 disable_mu_mimo = true; 1506 break; 1507 } 1508 } 1509 if (disable_mu_mimo) 1510 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1511 else 1512 mu_mimo_owner = true; 1513 } 1514 1515 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1516 1517 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1518 our_bf_sts = cap & mask; 1519 1520 if (ap_bf_sts < our_bf_sts) { 1521 cap &= ~mask; 1522 cap |= ap_bf_sts; 1523 } 1524 1525 /* reserve and fill IE */ 1526 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1527 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1528 1529 return mu_mimo_owner; 1530 } 1531 1532 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1533 struct sk_buff *skb, 1534 enum nl80211_chan_width width, 1535 struct ieee80211_supported_band *sband, 1536 struct ieee80211_mgd_assoc_data *assoc_data) 1537 { 1538 u32 rates; 1539 1540 if (assoc_data->supp_rates_len && 1541 !ieee80211_hw_check(&local->hw, STRICT)) { 1542 /* 1543 * Get all rates supported by the device and the AP as 1544 * some APs don't like getting a superset of their rates 1545 * in the association request (e.g. D-Link DAP 1353 in 1546 * b-only mode)... 1547 */ 1548 ieee80211_parse_bitrates(width, sband, 1549 assoc_data->supp_rates, 1550 assoc_data->supp_rates_len, 1551 &rates); 1552 } else { 1553 /* 1554 * In case AP not provide any supported rates information 1555 * before association, we send information element(s) with 1556 * all rates that we support. 1557 */ 1558 rates = ~0; 1559 } 1560 1561 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1562 WLAN_EID_SUPP_RATES); 1563 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1564 WLAN_EID_EXT_SUPP_RATES); 1565 } 1566 1567 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1568 const u8 *elems, 1569 size_t elems_len, 1570 size_t offset) 1571 { 1572 size_t noffset; 1573 1574 static const u8 before_ht[] = { 1575 WLAN_EID_SSID, 1576 WLAN_EID_SUPP_RATES, 1577 WLAN_EID_EXT_SUPP_RATES, 1578 WLAN_EID_PWR_CAPABILITY, 1579 WLAN_EID_SUPPORTED_CHANNELS, 1580 WLAN_EID_RSN, 1581 WLAN_EID_QOS_CAPA, 1582 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1583 WLAN_EID_MOBILITY_DOMAIN, 1584 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1585 WLAN_EID_RIC_DATA, /* reassoc only */ 1586 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1587 }; 1588 static const u8 after_ric[] = { 1589 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1590 WLAN_EID_HT_CAPABILITY, 1591 WLAN_EID_BSS_COEX_2040, 1592 /* luckily this is almost always there */ 1593 WLAN_EID_EXT_CAPABILITY, 1594 WLAN_EID_QOS_TRAFFIC_CAPA, 1595 WLAN_EID_TIM_BCAST_REQ, 1596 WLAN_EID_INTERWORKING, 1597 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1598 WLAN_EID_VHT_CAPABILITY, 1599 WLAN_EID_OPMODE_NOTIF, 1600 }; 1601 1602 if (!elems_len) 1603 return offset; 1604 1605 noffset = ieee80211_ie_split_ric(elems, elems_len, 1606 before_ht, 1607 ARRAY_SIZE(before_ht), 1608 after_ric, 1609 ARRAY_SIZE(after_ric), 1610 offset); 1611 skb_put_data(skb, elems + offset, noffset - offset); 1612 1613 return noffset; 1614 } 1615 1616 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1617 const u8 *elems, 1618 size_t elems_len, 1619 size_t offset) 1620 { 1621 static const u8 before_vht[] = { 1622 /* 1623 * no need to list the ones split off before HT 1624 * or generated here 1625 */ 1626 WLAN_EID_BSS_COEX_2040, 1627 WLAN_EID_EXT_CAPABILITY, 1628 WLAN_EID_QOS_TRAFFIC_CAPA, 1629 WLAN_EID_TIM_BCAST_REQ, 1630 WLAN_EID_INTERWORKING, 1631 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1632 }; 1633 size_t noffset; 1634 1635 if (!elems_len) 1636 return offset; 1637 1638 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1639 noffset = ieee80211_ie_split(elems, elems_len, 1640 before_vht, ARRAY_SIZE(before_vht), 1641 offset); 1642 skb_put_data(skb, elems + offset, noffset - offset); 1643 1644 return noffset; 1645 } 1646 1647 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1648 const u8 *elems, 1649 size_t elems_len, 1650 size_t offset) 1651 { 1652 static const u8 before_he[] = { 1653 /* 1654 * no need to list the ones split off before VHT 1655 * or generated here 1656 */ 1657 WLAN_EID_OPMODE_NOTIF, 1658 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1659 /* 11ai elements */ 1660 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1661 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1662 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1663 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1664 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1665 /* TODO: add 11ah/11aj/11ak elements */ 1666 }; 1667 size_t noffset; 1668 1669 if (!elems_len) 1670 return offset; 1671 1672 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1673 noffset = ieee80211_ie_split(elems, elems_len, 1674 before_he, ARRAY_SIZE(before_he), 1675 offset); 1676 skb_put_data(skb, elems + offset, noffset - offset); 1677 1678 return noffset; 1679 } 1680 1681 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1682 const u8 *elems, size_t elems_len, 1683 size_t offset) 1684 { 1685 static const u8 before_reg_conn[] = { 1686 /* 1687 * no need to list the ones split off before HE 1688 * or generated here 1689 */ 1690 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1691 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1692 }; 1693 size_t noffset; 1694 1695 if (!elems_len) 1696 return offset; 1697 1698 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1699 ARRAY_SIZE(before_reg_conn), offset); 1700 skb_put_data(skb, elems + offset, noffset - offset); 1701 1702 return noffset; 1703 } 1704 1705 #define PRESENT_ELEMS_MAX 8 1706 #define PRESENT_ELEM_EXT_OFFS 0x100 1707 1708 static void 1709 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1710 struct sk_buff *skb, u16 capab, 1711 const struct element *ext_capa, 1712 const u16 *present_elems, 1713 struct ieee80211_mgd_assoc_data *assoc_data); 1714 1715 static size_t 1716 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1717 struct sk_buff *skb, u16 *capab, 1718 const struct element *ext_capa, 1719 const u8 *extra_elems, 1720 size_t extra_elems_len, 1721 unsigned int link_id, 1722 struct ieee80211_link_data *link, 1723 u16 *present_elems, 1724 struct ieee80211_mgd_assoc_data *assoc_data) 1725 { 1726 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1727 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1728 struct ieee80211_channel *chan = cbss->channel; 1729 const struct ieee80211_sband_iftype_data *iftd; 1730 struct ieee80211_local *local = sdata->local; 1731 struct ieee80211_supported_band *sband; 1732 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1733 struct ieee80211_chanctx_conf *chanctx_conf; 1734 enum ieee80211_smps_mode smps_mode; 1735 u16 orig_capab = *capab; 1736 size_t offset = 0; 1737 int present_elems_len = 0; 1738 u8 *pos; 1739 int i; 1740 1741 #define ADD_PRESENT_ELEM(id) do { \ 1742 /* need a last for termination - we use 0 == SSID */ \ 1743 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1744 present_elems[present_elems_len++] = (id); \ 1745 } while (0) 1746 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1747 1748 if (link) 1749 smps_mode = link->smps_mode; 1750 else if (sdata->u.mgd.powersave) 1751 smps_mode = IEEE80211_SMPS_DYNAMIC; 1752 else 1753 smps_mode = IEEE80211_SMPS_OFF; 1754 1755 if (link) { 1756 /* 1757 * 5/10 MHz scenarios are only viable without MLO, in which 1758 * case this pointer should be used ... All of this is a bit 1759 * unclear though, not sure this even works at all. 1760 */ 1761 rcu_read_lock(); 1762 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1763 if (chanctx_conf) 1764 width = chanctx_conf->def.width; 1765 rcu_read_unlock(); 1766 } 1767 1768 sband = local->hw.wiphy->bands[chan->band]; 1769 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1770 1771 if (sband->band == NL80211_BAND_2GHZ) { 1772 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1773 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1774 } 1775 1776 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1777 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1778 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1779 1780 if (sband->band != NL80211_BAND_S1GHZ) 1781 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1782 1783 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1784 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1785 struct cfg80211_chan_def chandef = { 1786 .width = width, 1787 .chan = chan, 1788 }; 1789 1790 pos = skb_put(skb, 4); 1791 *pos++ = WLAN_EID_PWR_CAPABILITY; 1792 *pos++ = 2; 1793 *pos++ = 0; /* min tx power */ 1794 /* max tx power */ 1795 *pos++ = ieee80211_chandef_max_power(&chandef); 1796 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1797 } 1798 1799 /* 1800 * Per spec, we shouldn't include the list of channels if we advertise 1801 * support for extended channel switching, but we've always done that; 1802 * (for now?) apply this restriction only on the (new) 6 GHz band. 1803 */ 1804 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1805 (sband->band != NL80211_BAND_6GHZ || 1806 !ext_capa || ext_capa->datalen < 1 || 1807 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1808 /* TODO: get this in reg domain format */ 1809 pos = skb_put(skb, 2 * sband->n_channels + 2); 1810 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1811 *pos++ = 2 * sband->n_channels; 1812 for (i = 0; i < sband->n_channels; i++) { 1813 int cf = sband->channels[i].center_freq; 1814 1815 *pos++ = ieee80211_frequency_to_channel(cf); 1816 *pos++ = 1; /* one channel in the subband*/ 1817 } 1818 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1819 } 1820 1821 /* if present, add any custom IEs that go before HT */ 1822 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1823 extra_elems_len, 1824 offset); 1825 1826 if (sband->band != NL80211_BAND_6GHZ && 1827 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1828 ieee80211_add_ht_ie(sdata, skb, 1829 assoc_data->link[link_id].ap_ht_param, 1830 sband, chan, smps_mode, 1831 &assoc_data->link[link_id].conn); 1832 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1833 } 1834 1835 /* if present, add any custom IEs that go before VHT */ 1836 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1837 extra_elems_len, 1838 offset); 1839 1840 if (sband->band != NL80211_BAND_6GHZ && 1841 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1842 sband->vht_cap.vht_supported) { 1843 bool mu_mimo_owner = 1844 ieee80211_add_vht_ie(sdata, skb, sband, 1845 &assoc_data->link[link_id].ap_vht_cap, 1846 &assoc_data->link[link_id].conn); 1847 1848 if (link) 1849 link->conf->mu_mimo_owner = mu_mimo_owner; 1850 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1851 } 1852 1853 /* if present, add any custom IEs that go before HE */ 1854 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1855 extra_elems_len, 1856 offset); 1857 1858 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1859 ieee80211_put_he_cap(skb, sdata, sband, 1860 &assoc_data->link[link_id].conn); 1861 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1862 if (sband->band == NL80211_BAND_6GHZ) 1863 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1864 } 1865 1866 /* 1867 * if present, add any custom IEs that go before regulatory 1868 * connectivity element 1869 */ 1870 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1871 extra_elems_len, offset); 1872 1873 if (sband->band == NL80211_BAND_6GHZ) { 1874 /* 1875 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1876 * capable of operating on the 6 GHz band shall transmit 1877 * regulatory connectivity element. 1878 */ 1879 ieee80211_put_reg_conn(skb, chan->flags); 1880 } 1881 1882 /* 1883 * careful - need to know about all the present elems before 1884 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1885 * we're going to put it after the ML element 1886 */ 1887 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1888 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1889 1890 if (link_id == assoc_data->assoc_link_id) 1891 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1892 present_elems, assoc_data); 1893 1894 /* crash if somebody gets it wrong */ 1895 present_elems = NULL; 1896 1897 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1898 ieee80211_put_eht_cap(skb, sdata, sband, 1899 &assoc_data->link[link_id].conn); 1900 1901 if (sband->band == NL80211_BAND_S1GHZ) { 1902 ieee80211_add_aid_request_ie(sdata, skb); 1903 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1904 } 1905 1906 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1907 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1908 1909 return offset; 1910 } 1911 1912 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1913 const u16 *outer, 1914 const u16 *inner) 1915 { 1916 unsigned int skb_len = skb->len; 1917 bool at_extension = false; 1918 bool added = false; 1919 int i, j; 1920 u8 *len, *list_len = NULL; 1921 1922 skb_put_u8(skb, WLAN_EID_EXTENSION); 1923 len = skb_put(skb, 1); 1924 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1925 1926 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1927 u16 elem = outer[i]; 1928 bool have_inner = false; 1929 1930 /* should at least be sorted in the sense of normal -> ext */ 1931 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1932 1933 /* switch to extension list */ 1934 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1935 at_extension = true; 1936 if (!list_len) 1937 skb_put_u8(skb, 0); 1938 list_len = NULL; 1939 } 1940 1941 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1942 if (elem == inner[j]) { 1943 have_inner = true; 1944 break; 1945 } 1946 } 1947 1948 if (have_inner) 1949 continue; 1950 1951 if (!list_len) { 1952 list_len = skb_put(skb, 1); 1953 *list_len = 0; 1954 } 1955 *list_len += 1; 1956 skb_put_u8(skb, (u8)elem); 1957 added = true; 1958 } 1959 1960 /* if we added a list but no extension list, make a zero-len one */ 1961 if (added && (!at_extension || !list_len)) 1962 skb_put_u8(skb, 0); 1963 1964 /* if nothing added remove extension element completely */ 1965 if (!added) 1966 skb_trim(skb, skb_len); 1967 else 1968 *len = skb->len - skb_len - 2; 1969 } 1970 1971 static void 1972 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1973 struct sk_buff *skb, u16 capab, 1974 const struct element *ext_capa, 1975 const u16 *outer_present_elems, 1976 struct ieee80211_mgd_assoc_data *assoc_data) 1977 { 1978 struct ieee80211_local *local = sdata->local; 1979 struct ieee80211_multi_link_elem *ml_elem; 1980 struct ieee80211_mle_basic_common_info *common; 1981 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1982 __le16 eml_capa = 0, mld_capa_ops = 0; 1983 unsigned int link_id; 1984 u8 *ml_elem_len; 1985 void *capab_pos; 1986 1987 if (!ieee80211_vif_is_mld(&sdata->vif)) 1988 return; 1989 1990 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1991 ieee80211_vif_type_p2p(&sdata->vif)); 1992 if (ift_ext_capa) { 1993 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1994 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1995 } 1996 1997 skb_put_u8(skb, WLAN_EID_EXTENSION); 1998 ml_elem_len = skb_put(skb, 1); 1999 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 2000 ml_elem = skb_put(skb, sizeof(*ml_elem)); 2001 ml_elem->control = 2002 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 2003 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 2004 common = skb_put(skb, sizeof(*common)); 2005 common->len = sizeof(*common) + 2006 2; /* MLD capa/ops */ 2007 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 2008 2009 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 2010 if (eml_capa & 2011 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 2012 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 2013 common->len += 2; /* EML capabilities */ 2014 ml_elem->control |= 2015 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 2016 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 2017 } 2018 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2019 2020 if (assoc_data->ext_mld_capa_ops) { 2021 ml_elem->control |= 2022 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2023 common->len += 2; 2024 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2025 sizeof(assoc_data->ext_mld_capa_ops)); 2026 } 2027 2028 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2029 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2030 const u8 *extra_elems; 2031 size_t extra_elems_len; 2032 size_t extra_used; 2033 u8 *subelem_len = NULL; 2034 __le16 ctrl; 2035 2036 if (!assoc_data->link[link_id].bss || 2037 link_id == assoc_data->assoc_link_id) 2038 continue; 2039 2040 extra_elems = assoc_data->link[link_id].elems; 2041 extra_elems_len = assoc_data->link[link_id].elems_len; 2042 2043 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2044 subelem_len = skb_put(skb, 1); 2045 2046 ctrl = cpu_to_le16(link_id | 2047 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2048 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2049 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2050 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2051 skb_put_data(skb, assoc_data->link[link_id].addr, 2052 ETH_ALEN); 2053 /* 2054 * Now add the contents of the (re)association request, 2055 * but the "listen interval" and "current AP address" 2056 * (if applicable) are skipped. So we only have 2057 * the capability field (remember the position and fill 2058 * later), followed by the elements added below by 2059 * calling ieee80211_add_link_elems(). 2060 */ 2061 capab_pos = skb_put(skb, 2); 2062 2063 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2064 ext_capa, 2065 extra_elems, 2066 extra_elems_len, 2067 link_id, NULL, 2068 link_present_elems, 2069 assoc_data); 2070 if (extra_elems) 2071 skb_put_data(skb, extra_elems + extra_used, 2072 extra_elems_len - extra_used); 2073 2074 put_unaligned_le16(capab, capab_pos); 2075 2076 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2077 link_present_elems); 2078 2079 ieee80211_fragment_element(skb, subelem_len, 2080 IEEE80211_MLE_SUBELEM_FRAGMENT); 2081 } 2082 2083 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2084 } 2085 2086 static int 2087 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2088 enum nl80211_iftype iftype, 2089 struct cfg80211_bss *cbss, 2090 size_t elems_len) 2091 { 2092 struct ieee80211_local *local = sdata->local; 2093 const struct ieee80211_sband_iftype_data *iftd; 2094 struct ieee80211_supported_band *sband; 2095 size_t size = 0; 2096 2097 if (!cbss) 2098 return size; 2099 2100 sband = local->hw.wiphy->bands[cbss->channel->band]; 2101 2102 /* add STA profile elements length */ 2103 size += elems_len; 2104 2105 /* and supported rates length */ 2106 size += 4 + sband->n_bitrates; 2107 2108 /* supported channels */ 2109 size += 2 + 2 * sband->n_channels; 2110 2111 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2112 if (iftd) 2113 size += iftd->vendor_elems.len; 2114 2115 /* power capability */ 2116 size += 4; 2117 2118 /* HT, VHT, HE, EHT */ 2119 size += 2 + sizeof(struct ieee80211_ht_cap); 2120 size += 2 + sizeof(struct ieee80211_vht_cap); 2121 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2122 sizeof(struct ieee80211_he_mcs_nss_supp) + 2123 IEEE80211_HE_PPE_THRES_MAX_LEN; 2124 2125 if (sband->band == NL80211_BAND_6GHZ) { 2126 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2127 /* reg connection */ 2128 size += 4; 2129 } 2130 2131 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2132 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2133 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2134 2135 return size; 2136 } 2137 2138 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2139 { 2140 struct ieee80211_local *local = sdata->local; 2141 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2142 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2143 struct ieee80211_link_data *link; 2144 struct sk_buff *skb; 2145 struct ieee80211_mgmt *mgmt; 2146 u8 *pos, qos_info, *ie_start; 2147 size_t offset, noffset; 2148 u16 capab = 0, link_capab; 2149 __le16 listen_int; 2150 struct element *ext_capa = NULL; 2151 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2152 struct ieee80211_prep_tx_info info = {}; 2153 unsigned int link_id, n_links = 0; 2154 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2155 void *capab_pos; 2156 size_t size; 2157 int ret; 2158 2159 /* we know it's writable, cast away the const */ 2160 if (assoc_data->ie_len) 2161 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2162 assoc_data->ie, 2163 assoc_data->ie_len); 2164 2165 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2166 2167 size = local->hw.extra_tx_headroom + 2168 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2169 2 + assoc_data->ssid_len + /* SSID */ 2170 assoc_data->ie_len + /* extra IEs */ 2171 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2172 9; /* WMM */ 2173 2174 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2175 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2176 size_t elems_len = assoc_data->link[link_id].elems_len; 2177 2178 if (!cbss) 2179 continue; 2180 2181 n_links++; 2182 2183 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2184 elems_len); 2185 2186 /* non-inheritance element */ 2187 size += 2 + 2 + PRESENT_ELEMS_MAX; 2188 2189 /* should be the same across all BSSes */ 2190 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2191 capab |= WLAN_CAPABILITY_PRIVACY; 2192 } 2193 2194 if (ieee80211_vif_is_mld(&sdata->vif)) { 2195 /* consider the multi-link element with STA profile */ 2196 size += sizeof(struct ieee80211_multi_link_elem); 2197 /* max common info field in basic multi-link element */ 2198 size += sizeof(struct ieee80211_mle_basic_common_info) + 2199 2 + /* capa & op */ 2200 2 + /* ext capa & op */ 2201 2; /* EML capa */ 2202 2203 /* The capability elements were already considered above */ 2204 size += (n_links - 1) * 2205 (1 + 1 + /* subelement ID/length */ 2206 2 + /* STA control */ 2207 1 + ETH_ALEN + 2 /* STA Info field */); 2208 } 2209 2210 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2211 if (WARN_ON(!link)) 2212 return -EINVAL; 2213 2214 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2215 return -EINVAL; 2216 2217 skb = alloc_skb(size, GFP_KERNEL); 2218 if (!skb) 2219 return -ENOMEM; 2220 2221 skb_reserve(skb, local->hw.extra_tx_headroom); 2222 2223 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2224 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2225 2226 /* Set MBSSID support for HE AP if needed */ 2227 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2228 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2229 ext_capa && ext_capa->datalen >= 3) 2230 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2231 2232 mgmt = skb_put_zero(skb, 24); 2233 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2234 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2235 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2236 2237 listen_int = cpu_to_le16(assoc_data->s1g ? 2238 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2239 local->hw.conf.listen_interval); 2240 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2241 skb_put(skb, 10); 2242 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2243 IEEE80211_STYPE_REASSOC_REQ); 2244 capab_pos = &mgmt->u.reassoc_req.capab_info; 2245 mgmt->u.reassoc_req.listen_interval = listen_int; 2246 memcpy(mgmt->u.reassoc_req.current_ap, 2247 assoc_data->prev_ap_addr, ETH_ALEN); 2248 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2249 } else { 2250 skb_put(skb, 4); 2251 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2252 IEEE80211_STYPE_ASSOC_REQ); 2253 capab_pos = &mgmt->u.assoc_req.capab_info; 2254 mgmt->u.assoc_req.listen_interval = listen_int; 2255 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2256 } 2257 2258 /* SSID */ 2259 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2260 ie_start = pos; 2261 *pos++ = WLAN_EID_SSID; 2262 *pos++ = assoc_data->ssid_len; 2263 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2264 2265 /* 2266 * This bit is technically reserved, so it shouldn't matter for either 2267 * the AP or us, but it also means we shouldn't set it. However, we've 2268 * always set it in the past, and apparently some EHT APs check that 2269 * we don't set it. To avoid interoperability issues with old APs that 2270 * for some reason check it and want it to be set, set the bit for all 2271 * pre-EHT connections as we used to do. 2272 */ 2273 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2274 !ieee80211_hw_check(&local->hw, STRICT)) 2275 capab |= WLAN_CAPABILITY_ESS; 2276 2277 /* add the elements for the assoc (main) link */ 2278 link_capab = capab; 2279 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2280 ext_capa, 2281 assoc_data->ie, 2282 assoc_data->ie_len, 2283 assoc_data->assoc_link_id, link, 2284 present_elems, assoc_data); 2285 put_unaligned_le16(link_capab, capab_pos); 2286 2287 /* if present, add any custom non-vendor IEs */ 2288 if (assoc_data->ie_len) { 2289 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2290 assoc_data->ie_len, 2291 offset); 2292 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2293 offset = noffset; 2294 } 2295 2296 if (assoc_data->wmm) { 2297 if (assoc_data->uapsd) { 2298 qos_info = ifmgd->uapsd_queues; 2299 qos_info |= (ifmgd->uapsd_max_sp_len << 2300 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2301 } else { 2302 qos_info = 0; 2303 } 2304 2305 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2306 } 2307 2308 /* add any remaining custom (i.e. vendor specific here) IEs */ 2309 if (assoc_data->ie_len) { 2310 noffset = assoc_data->ie_len; 2311 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2312 } 2313 2314 if (assoc_data->fils_kek_len) { 2315 ret = fils_encrypt_assoc_req(skb, assoc_data); 2316 if (ret < 0) { 2317 dev_kfree_skb(skb); 2318 return ret; 2319 } 2320 } 2321 2322 pos = skb_tail_pointer(skb); 2323 kfree(ifmgd->assoc_req_ies); 2324 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2325 if (!ifmgd->assoc_req_ies) { 2326 dev_kfree_skb(skb); 2327 return -ENOMEM; 2328 } 2329 2330 ifmgd->assoc_req_ies_len = pos - ie_start; 2331 2332 info.link_id = assoc_data->assoc_link_id; 2333 drv_mgd_prepare_tx(local, sdata, &info); 2334 2335 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2336 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2337 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2338 IEEE80211_TX_INTFL_MLME_CONN_TX; 2339 ieee80211_tx_skb(sdata, skb); 2340 2341 return 0; 2342 } 2343 2344 void ieee80211_send_pspoll(struct ieee80211_local *local, 2345 struct ieee80211_sub_if_data *sdata) 2346 { 2347 struct ieee80211_pspoll *pspoll; 2348 struct sk_buff *skb; 2349 2350 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2351 if (!skb) 2352 return; 2353 2354 pspoll = (struct ieee80211_pspoll *) skb->data; 2355 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2356 2357 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2358 ieee80211_tx_skb(sdata, skb); 2359 } 2360 2361 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2362 struct ieee80211_sub_if_data *sdata, 2363 bool powersave) 2364 { 2365 struct sk_buff *skb; 2366 struct ieee80211_hdr_3addr *nullfunc; 2367 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2368 2369 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2370 !ieee80211_hw_check(&local->hw, 2371 DOESNT_SUPPORT_QOS_NDP)); 2372 if (!skb) 2373 return; 2374 2375 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2376 if (powersave) 2377 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2378 2379 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2380 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2381 2382 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2383 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2384 2385 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2386 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2387 2388 ieee80211_tx_skb(sdata, skb); 2389 } 2390 2391 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2392 struct ieee80211_sub_if_data *sdata) 2393 { 2394 struct sk_buff *skb; 2395 struct ieee80211_hdr *nullfunc; 2396 __le16 fc; 2397 2398 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2399 return; 2400 2401 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2402 if (!skb) 2403 return; 2404 2405 skb_reserve(skb, local->hw.extra_tx_headroom); 2406 2407 nullfunc = skb_put_zero(skb, 30); 2408 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2409 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2410 nullfunc->frame_control = fc; 2411 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2412 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2413 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2414 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2415 2416 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2417 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2418 ieee80211_tx_skb(sdata, skb); 2419 } 2420 2421 /* spectrum management related things */ 2422 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2423 struct wiphy_work *work) 2424 { 2425 struct ieee80211_link_data *link = 2426 container_of(work, struct ieee80211_link_data, 2427 u.mgd.csa.switch_work.work); 2428 struct ieee80211_sub_if_data *sdata = link->sdata; 2429 struct ieee80211_local *local = sdata->local; 2430 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2431 int ret; 2432 2433 if (!ieee80211_sdata_running(sdata)) 2434 return; 2435 2436 lockdep_assert_wiphy(local->hw.wiphy); 2437 2438 if (!ifmgd->associated) 2439 return; 2440 2441 if (!link->conf->csa_active) 2442 return; 2443 2444 /* 2445 * If the link isn't active (now), we cannot wait for beacons, won't 2446 * have a reserved chanctx, etc. Just switch over the chandef and 2447 * update cfg80211 directly. 2448 */ 2449 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2450 struct link_sta_info *link_sta; 2451 struct sta_info *ap_sta; 2452 2453 link->conf->chanreq = link->csa.chanreq; 2454 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2455 link->link_id); 2456 link->conf->csa_active = false; 2457 2458 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2459 if (WARN_ON(!ap_sta)) 2460 return; 2461 2462 link_sta = wiphy_dereference(wiphy, 2463 ap_sta->link[link->link_id]); 2464 if (WARN_ON(!link_sta)) 2465 return; 2466 2467 link_sta->pub->bandwidth = 2468 _ieee80211_sta_cur_vht_bw(link_sta, 2469 &link->csa.chanreq.oper); 2470 return; 2471 } 2472 2473 /* 2474 * using reservation isn't immediate as it may be deferred until later 2475 * with multi-vif. once reservation is complete it will re-schedule the 2476 * work with no reserved_chanctx so verify chandef to check if it 2477 * completed successfully 2478 */ 2479 2480 if (link->reserved_chanctx) { 2481 /* 2482 * with multi-vif csa driver may call ieee80211_csa_finish() 2483 * many times while waiting for other interfaces to use their 2484 * reservations 2485 */ 2486 if (link->reserved_ready) 2487 return; 2488 2489 ret = ieee80211_link_use_reserved_context(link); 2490 if (ret) { 2491 link_info(link, 2492 "failed to use reserved channel context, disconnecting (err=%d)\n", 2493 ret); 2494 wiphy_work_queue(sdata->local->hw.wiphy, 2495 &ifmgd->csa_connection_drop_work); 2496 } 2497 return; 2498 } 2499 2500 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2501 &link->csa.chanreq)) { 2502 link_info(link, 2503 "failed to finalize channel switch, disconnecting\n"); 2504 wiphy_work_queue(sdata->local->hw.wiphy, 2505 &ifmgd->csa_connection_drop_work); 2506 return; 2507 } 2508 2509 link->u.mgd.csa.waiting_bcn = true; 2510 2511 /* 2512 * The next beacon really should always be different, so this should 2513 * have no effect whatsoever. However, some APs (we observed this in 2514 * an Asus AXE11000), the beacon after the CSA might be identical to 2515 * the last beacon on the old channel - in this case we'd ignore it. 2516 * Resetting the CRC will lead us to handle it better (albeit with a 2517 * disconnect, but clearly the AP is broken.) 2518 */ 2519 link->u.mgd.beacon_crc_valid = false; 2520 2521 /* apply new TPE restrictions immediately on the new channel */ 2522 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2523 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2524 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2525 &link->u.mgd.csa.ap_chandef, 2526 &link->conf->chanreq.oper); 2527 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2528 sizeof(link->u.mgd.csa.tpe))) { 2529 link->conf->tpe = link->u.mgd.csa.tpe; 2530 ieee80211_link_info_change_notify(sdata, link, 2531 BSS_CHANGED_TPE); 2532 } 2533 } 2534 2535 /* 2536 * It is not necessary to reset these timers if any link does not 2537 * have an active CSA and that link still receives the beacons 2538 * when other links have active CSA. 2539 */ 2540 for_each_link_data(sdata, link) { 2541 if (!link->conf->csa_active) 2542 return; 2543 } 2544 2545 /* 2546 * Reset the beacon monitor and connection monitor timers when CSA 2547 * is active for all links in MLO when channel switch occurs in all 2548 * the links. 2549 */ 2550 ieee80211_sta_reset_beacon_monitor(sdata); 2551 ieee80211_sta_reset_conn_monitor(sdata); 2552 } 2553 2554 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2555 { 2556 struct ieee80211_sub_if_data *sdata = link->sdata; 2557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2558 int ret; 2559 2560 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2561 2562 WARN_ON(!link->conf->csa_active); 2563 2564 ieee80211_vif_unblock_queues_csa(sdata); 2565 2566 link->conf->csa_active = false; 2567 link->u.mgd.csa.blocked_tx = false; 2568 link->u.mgd.csa.waiting_bcn = false; 2569 2570 ret = drv_post_channel_switch(link); 2571 if (ret) { 2572 link_info(link, 2573 "driver post channel switch failed, disconnecting\n"); 2574 wiphy_work_queue(sdata->local->hw.wiphy, 2575 &ifmgd->csa_connection_drop_work); 2576 return; 2577 } 2578 2579 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2580 link->link_id); 2581 } 2582 2583 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2584 unsigned int link_id) 2585 { 2586 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2587 2588 trace_api_chswitch_done(sdata, success, link_id); 2589 2590 rcu_read_lock(); 2591 2592 if (!success) { 2593 sdata_info(sdata, 2594 "driver channel switch failed (link %d), disconnecting\n", 2595 link_id); 2596 wiphy_work_queue(sdata->local->hw.wiphy, 2597 &sdata->u.mgd.csa_connection_drop_work); 2598 } else { 2599 struct ieee80211_link_data *link = 2600 rcu_dereference(sdata->link[link_id]); 2601 2602 if (WARN_ON(!link)) { 2603 rcu_read_unlock(); 2604 return; 2605 } 2606 2607 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 2608 &link->u.mgd.csa.switch_work, 0); 2609 } 2610 2611 rcu_read_unlock(); 2612 } 2613 EXPORT_SYMBOL(ieee80211_chswitch_done); 2614 2615 static void 2616 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2617 { 2618 struct ieee80211_sub_if_data *sdata = link->sdata; 2619 struct ieee80211_local *local = sdata->local; 2620 2621 lockdep_assert_wiphy(local->hw.wiphy); 2622 2623 if (!local->ops->abort_channel_switch) 2624 return; 2625 2626 if (rcu_access_pointer(link->conf->chanctx_conf)) 2627 ieee80211_link_unreserve_chanctx(link); 2628 2629 ieee80211_vif_unblock_queues_csa(sdata); 2630 2631 link->conf->csa_active = false; 2632 link->u.mgd.csa.blocked_tx = false; 2633 2634 drv_abort_channel_switch(link); 2635 } 2636 2637 struct sta_csa_rnr_iter_data { 2638 struct ieee80211_link_data *link; 2639 struct ieee80211_channel *chan; 2640 u8 mld_id; 2641 }; 2642 2643 static enum cfg80211_rnr_iter_ret 2644 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2645 const struct ieee80211_neighbor_ap_info *info, 2646 const u8 *tbtt_info, u8 tbtt_info_len) 2647 { 2648 struct sta_csa_rnr_iter_data *data = _data; 2649 struct ieee80211_link_data *link = data->link; 2650 struct ieee80211_sub_if_data *sdata = link->sdata; 2651 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2652 const struct ieee80211_tbtt_info_ge_11 *ti; 2653 enum nl80211_band band; 2654 unsigned int center_freq; 2655 int link_id; 2656 2657 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2658 return RNR_ITER_CONTINUE; 2659 2660 if (tbtt_info_len < sizeof(*ti)) 2661 return RNR_ITER_CONTINUE; 2662 2663 ti = (const void *)tbtt_info; 2664 2665 if (ti->mld_params.mld_id != data->mld_id) 2666 return RNR_ITER_CONTINUE; 2667 2668 link_id = le16_get_bits(ti->mld_params.params, 2669 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2670 if (link_id != data->link->link_id) 2671 return RNR_ITER_CONTINUE; 2672 2673 /* we found the entry for our link! */ 2674 2675 /* this AP is confused, it had this right before ... just disconnect */ 2676 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2677 link_info(link, 2678 "AP now has invalid operating class in RNR, disconnect\n"); 2679 wiphy_work_queue(sdata->local->hw.wiphy, 2680 &ifmgd->csa_connection_drop_work); 2681 return RNR_ITER_BREAK; 2682 } 2683 2684 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2685 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2686 2687 return RNR_ITER_BREAK; 2688 } 2689 2690 static void 2691 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2692 struct ieee802_11_elems *elems) 2693 { 2694 struct ieee80211_sub_if_data *sdata = link->sdata; 2695 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2696 struct sta_csa_rnr_iter_data data = { 2697 .link = link, 2698 }; 2699 2700 /* 2701 * If we get here, we see a beacon from another link without 2702 * CSA still being reported for it, so now we have to check 2703 * if the CSA was aborted or completed. This may not even be 2704 * perfectly possible if the CSA was only done for changing 2705 * the puncturing, but in that case if the link in inactive 2706 * we don't really care, and if it's an active link (or when 2707 * it's activated later) we'll get a beacon and adjust. 2708 */ 2709 2710 if (WARN_ON(!elems->ml_basic)) 2711 return; 2712 2713 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2714 2715 /* 2716 * So in order to do this, iterate the RNR element(s) and see 2717 * what channel is reported now. 2718 */ 2719 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2720 ieee80211_sta_csa_rnr_iter, &data); 2721 2722 if (!data.chan) { 2723 link_info(link, 2724 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2725 wiphy_work_queue(sdata->local->hw.wiphy, 2726 &ifmgd->csa_connection_drop_work); 2727 return; 2728 } 2729 2730 /* 2731 * If it doesn't match the CSA, then assume it aborted. This 2732 * may erroneously detect that it was _not_ aborted when it 2733 * was in fact aborted, but only changed the bandwidth or the 2734 * puncturing configuration, but we don't have enough data to 2735 * detect that. 2736 */ 2737 if (data.chan != link->csa.chanreq.oper.chan) 2738 ieee80211_sta_abort_chanswitch(link); 2739 } 2740 2741 enum ieee80211_csa_source { 2742 IEEE80211_CSA_SOURCE_BEACON, 2743 IEEE80211_CSA_SOURCE_OTHER_LINK, 2744 IEEE80211_CSA_SOURCE_PROT_ACTION, 2745 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2746 }; 2747 2748 static void 2749 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2750 u64 timestamp, u32 device_timestamp, 2751 struct ieee802_11_elems *full_elems, 2752 struct ieee802_11_elems *csa_elems, 2753 enum ieee80211_csa_source source) 2754 { 2755 struct ieee80211_sub_if_data *sdata = link->sdata; 2756 struct ieee80211_local *local = sdata->local; 2757 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2758 struct ieee80211_chanctx *chanctx = NULL; 2759 struct ieee80211_chanctx_conf *conf; 2760 struct ieee80211_csa_ie csa_ie = {}; 2761 struct ieee80211_channel_switch ch_switch = { 2762 .link_id = link->link_id, 2763 .timestamp = timestamp, 2764 .device_timestamp = device_timestamp, 2765 }; 2766 u32 csa_time_tu; 2767 ktime_t now; 2768 int res; 2769 2770 lockdep_assert_wiphy(local->hw.wiphy); 2771 2772 if (csa_elems) { 2773 struct cfg80211_bss *cbss = link->conf->bss; 2774 enum nl80211_band current_band; 2775 struct ieee80211_bss *bss; 2776 2777 if (WARN_ON(!cbss)) 2778 return; 2779 2780 current_band = cbss->channel->band; 2781 bss = (void *)cbss->priv; 2782 2783 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2784 current_band, 2785 bss->vht_cap_info, 2786 &link->u.mgd.conn, 2787 link->u.mgd.bssid, 2788 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2789 &csa_ie); 2790 if (res == 0) { 2791 ch_switch.block_tx = csa_ie.mode; 2792 ch_switch.chandef = csa_ie.chanreq.oper; 2793 ch_switch.count = csa_ie.count; 2794 ch_switch.delay = csa_ie.max_switch_time; 2795 } 2796 2797 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2798 } else { 2799 /* 2800 * If there was no per-STA profile for this link, we 2801 * get called with csa_elems == NULL. This of course means 2802 * there are no CSA elements, so set res=1 indicating 2803 * no more CSA. 2804 */ 2805 res = 1; 2806 } 2807 2808 if (res < 0) { 2809 /* ignore this case, not a protected frame */ 2810 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2811 return; 2812 goto drop_connection; 2813 } 2814 2815 if (link->conf->csa_active) { 2816 switch (source) { 2817 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2818 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2819 /* already processing - disregard action frames */ 2820 return; 2821 case IEEE80211_CSA_SOURCE_BEACON: 2822 if (link->u.mgd.csa.waiting_bcn) { 2823 ieee80211_chswitch_post_beacon(link); 2824 /* 2825 * If the CSA is still present after the switch 2826 * we need to consider it as a new CSA (possibly 2827 * to self). This happens by not returning here 2828 * so we'll get to the check below. 2829 */ 2830 } else if (res) { 2831 ieee80211_sta_abort_chanswitch(link); 2832 return; 2833 } else { 2834 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2835 return; 2836 } 2837 break; 2838 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2839 /* active link: we want to see the beacon to continue */ 2840 if (ieee80211_vif_link_active(&sdata->vif, 2841 link->link_id)) 2842 return; 2843 2844 /* switch work ran, so just complete the process */ 2845 if (link->u.mgd.csa.waiting_bcn) { 2846 ieee80211_chswitch_post_beacon(link); 2847 /* 2848 * If the CSA is still present after the switch 2849 * we need to consider it as a new CSA (possibly 2850 * to self). This happens by not returning here 2851 * so we'll get to the check below. 2852 */ 2853 break; 2854 } 2855 2856 /* link still has CSA but we already know, do nothing */ 2857 if (!res) 2858 return; 2859 2860 /* check in the RNR if the CSA aborted */ 2861 ieee80211_sta_other_link_csa_disappeared(link, 2862 full_elems); 2863 return; 2864 } 2865 } 2866 2867 /* no active CSA nor a new one */ 2868 if (res) { 2869 /* 2870 * However, we may have stopped queues when receiving a public 2871 * action frame that couldn't be protected, if it had the quiet 2872 * bit set. This is a trade-off, we want to be quiet as soon as 2873 * possible, but also don't trust the public action frame much, 2874 * as it can't be protected. 2875 */ 2876 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2877 link->u.mgd.csa.blocked_tx = false; 2878 ieee80211_vif_unblock_queues_csa(sdata); 2879 } 2880 return; 2881 } 2882 2883 /* 2884 * We don't really trust public action frames, but block queues (go to 2885 * quiet mode) for them anyway, we should get a beacon soon to either 2886 * know what the CSA really is, or figure out the public action frame 2887 * was actually an attack. 2888 */ 2889 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2890 if (csa_ie.mode) { 2891 link->u.mgd.csa.blocked_tx = true; 2892 ieee80211_vif_block_queues_csa(sdata); 2893 } 2894 return; 2895 } 2896 2897 if (link->conf->chanreq.oper.chan->band != 2898 csa_ie.chanreq.oper.chan->band) { 2899 link_info(link, 2900 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2901 link->u.mgd.bssid, 2902 csa_ie.chanreq.oper.chan->center_freq, 2903 csa_ie.chanreq.oper.width, 2904 csa_ie.chanreq.oper.center_freq1, 2905 csa_ie.chanreq.oper.center_freq2); 2906 goto drop_connection; 2907 } 2908 2909 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2910 IEEE80211_CHAN_DISABLED)) { 2911 link_info(link, 2912 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2913 link->u.mgd.bssid, 2914 csa_ie.chanreq.oper.chan->center_freq, 2915 csa_ie.chanreq.oper.chan->freq_offset, 2916 csa_ie.chanreq.oper.width, 2917 csa_ie.chanreq.oper.center_freq1, 2918 csa_ie.chanreq.oper.freq1_offset, 2919 csa_ie.chanreq.oper.center_freq2); 2920 goto drop_connection; 2921 } 2922 2923 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2924 &link->conf->chanreq.oper) && 2925 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2926 if (link->u.mgd.csa.ignored_same_chan) 2927 return; 2928 link_info(link, 2929 "AP %pM tries to chanswitch to same channel, ignore\n", 2930 link->u.mgd.bssid); 2931 link->u.mgd.csa.ignored_same_chan = true; 2932 return; 2933 } 2934 2935 /* 2936 * Drop all TDLS peers on the affected link - either we disconnect or 2937 * move to a different channel from this point on. There's no telling 2938 * what our peer will do. 2939 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2940 * have an incompatible wider chandef. 2941 */ 2942 ieee80211_teardown_tdls_peers(link); 2943 2944 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2945 lockdep_is_held(&local->hw.wiphy->mtx)); 2946 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2947 link_info(link, 2948 "no channel context assigned to vif?, disconnecting\n"); 2949 goto drop_connection; 2950 } 2951 2952 if (conf) 2953 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2954 2955 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2956 link_info(link, 2957 "driver doesn't support chan-switch with channel contexts\n"); 2958 goto drop_connection; 2959 } 2960 2961 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2962 link_info(link, 2963 "preparing for channel switch failed, disconnecting\n"); 2964 goto drop_connection; 2965 } 2966 2967 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2968 2969 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2970 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2971 &csa_ie.chanreq.ap); 2972 2973 if (chanctx) { 2974 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2975 chanctx->mode, false); 2976 if (res) { 2977 link_info(link, 2978 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2979 res); 2980 goto drop_connection; 2981 } 2982 } 2983 2984 link->conf->csa_active = true; 2985 link->u.mgd.csa.ignored_same_chan = false; 2986 link->u.mgd.beacon_crc_valid = false; 2987 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2988 2989 if (csa_ie.mode) 2990 ieee80211_vif_block_queues_csa(sdata); 2991 2992 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2993 link->link_id, csa_ie.count, 2994 csa_ie.mode); 2995 2996 /* we may have to handle timeout for deactivated link in software */ 2997 now = ktime_get_boottime(); 2998 csa_time_tu = (max_t(int, csa_ie.count, 1) - 1) * link->conf->beacon_int; 2999 link->u.mgd.csa.time = now + us_to_ktime(ieee80211_tu_to_usec(csa_time_tu)); 3000 3001 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 3002 local->ops->channel_switch) { 3003 /* 3004 * Use driver's channel switch callback, the driver will 3005 * later call ieee80211_chswitch_done(). It may deactivate 3006 * the link as well, we handle that elsewhere and queue 3007 * the csa.switch_work for the calculated time then. 3008 */ 3009 drv_channel_switch(local, sdata, &ch_switch); 3010 return; 3011 } 3012 3013 /* channel switch handled in software */ 3014 wiphy_hrtimer_work_queue(local->hw.wiphy, 3015 &link->u.mgd.csa.switch_work, 3016 link->u.mgd.csa.time - now); 3017 return; 3018 drop_connection: 3019 /* 3020 * This is just so that the disconnect flow will know that 3021 * we were trying to switch channel and failed. In case the 3022 * mode is 1 (we are not allowed to Tx), we will know not to 3023 * send a deauthentication frame. Those two fields will be 3024 * reset when the disconnection worker runs. 3025 */ 3026 link->conf->csa_active = true; 3027 link->u.mgd.csa.blocked_tx = csa_ie.mode; 3028 3029 wiphy_work_queue(sdata->local->hw.wiphy, 3030 &ifmgd->csa_connection_drop_work); 3031 } 3032 3033 struct sta_bss_param_ch_cnt_data { 3034 struct ieee80211_sub_if_data *sdata; 3035 u8 reporting_link_id; 3036 u8 mld_id; 3037 }; 3038 3039 static enum cfg80211_rnr_iter_ret 3040 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 3041 const struct ieee80211_neighbor_ap_info *info, 3042 const u8 *tbtt_info, u8 tbtt_info_len) 3043 { 3044 struct sta_bss_param_ch_cnt_data *data = _data; 3045 struct ieee80211_sub_if_data *sdata = data->sdata; 3046 const struct ieee80211_tbtt_info_ge_11 *ti; 3047 u8 bss_param_ch_cnt; 3048 int link_id; 3049 3050 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3051 return RNR_ITER_CONTINUE; 3052 3053 if (tbtt_info_len < sizeof(*ti)) 3054 return RNR_ITER_CONTINUE; 3055 3056 ti = (const void *)tbtt_info; 3057 3058 if (ti->mld_params.mld_id != data->mld_id) 3059 return RNR_ITER_CONTINUE; 3060 3061 link_id = le16_get_bits(ti->mld_params.params, 3062 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3063 bss_param_ch_cnt = 3064 le16_get_bits(ti->mld_params.params, 3065 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3066 3067 if (bss_param_ch_cnt != 255 && 3068 link_id < ARRAY_SIZE(sdata->link)) { 3069 struct ieee80211_link_data *link = 3070 sdata_dereference(sdata->link[link_id], sdata); 3071 3072 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3073 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3074 link->conf->bss_param_ch_cnt_link_id = 3075 data->reporting_link_id; 3076 } 3077 } 3078 3079 return RNR_ITER_CONTINUE; 3080 } 3081 3082 static void 3083 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3084 struct ieee80211_bss_conf *bss_conf, 3085 struct ieee802_11_elems *elems) 3086 { 3087 struct sta_bss_param_ch_cnt_data data = { 3088 .reporting_link_id = bss_conf->link_id, 3089 .sdata = sdata, 3090 }; 3091 int bss_param_ch_cnt; 3092 3093 if (!elems->ml_basic) 3094 return; 3095 3096 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3097 3098 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3099 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3100 3101 bss_param_ch_cnt = 3102 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3103 3104 /* 3105 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3106 * didn't change to indicate that we got a beacon on our own 3107 * link. 3108 */ 3109 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3110 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3111 bss_conf->bss_param_ch_cnt_link_id = 3112 bss_conf->link_id; 3113 } 3114 } 3115 3116 static bool 3117 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3118 const u8 *country_ie, u8 country_ie_len, 3119 const u8 *pwr_constr_elem, 3120 int *chan_pwr, int *pwr_reduction) 3121 { 3122 struct ieee80211_country_ie_triplet *triplet; 3123 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3124 int i, chan_increment; 3125 bool have_chan_pwr = false; 3126 3127 /* Invalid IE */ 3128 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3129 return false; 3130 3131 triplet = (void *)(country_ie + 3); 3132 country_ie_len -= 3; 3133 3134 switch (channel->band) { 3135 default: 3136 WARN_ON_ONCE(1); 3137 fallthrough; 3138 case NL80211_BAND_2GHZ: 3139 case NL80211_BAND_60GHZ: 3140 case NL80211_BAND_LC: 3141 chan_increment = 1; 3142 break; 3143 case NL80211_BAND_5GHZ: 3144 chan_increment = 4; 3145 break; 3146 case NL80211_BAND_6GHZ: 3147 /* 3148 * In the 6 GHz band, the "maximum transmit power level" 3149 * field in the triplets is reserved, and thus will be 3150 * zero and we shouldn't use it to control TX power. 3151 * The actual TX power will be given in the transmit 3152 * power envelope element instead. 3153 */ 3154 return false; 3155 } 3156 3157 /* find channel */ 3158 while (country_ie_len >= 3) { 3159 u8 first_channel = triplet->chans.first_channel; 3160 3161 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3162 goto next; 3163 3164 for (i = 0; i < triplet->chans.num_channels; i++) { 3165 if (first_channel + i * chan_increment == chan) { 3166 have_chan_pwr = true; 3167 *chan_pwr = triplet->chans.max_power; 3168 break; 3169 } 3170 } 3171 if (have_chan_pwr) 3172 break; 3173 3174 next: 3175 triplet++; 3176 country_ie_len -= 3; 3177 } 3178 3179 if (have_chan_pwr && pwr_constr_elem) 3180 *pwr_reduction = *pwr_constr_elem; 3181 else 3182 *pwr_reduction = 0; 3183 3184 return have_chan_pwr; 3185 } 3186 3187 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3188 const u8 *cisco_dtpc_ie, 3189 int *pwr_level) 3190 { 3191 /* From practical testing, the first data byte of the DTPC element 3192 * seems to contain the requested dBm level, and the CLI on Cisco 3193 * APs clearly state the range is -127 to 127 dBm, which indicates 3194 * a signed byte, although it seemingly never actually goes negative. 3195 * The other byte seems to always be zero. 3196 */ 3197 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3198 } 3199 3200 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3201 struct ieee80211_channel *channel, 3202 struct ieee80211_mgmt *mgmt, 3203 const u8 *country_ie, u8 country_ie_len, 3204 const u8 *pwr_constr_ie, 3205 const u8 *cisco_dtpc_ie) 3206 { 3207 struct ieee80211_sub_if_data *sdata = link->sdata; 3208 bool has_80211h_pwr = false, has_cisco_pwr = false; 3209 int chan_pwr = 0, pwr_reduction_80211h = 0; 3210 int pwr_level_cisco, pwr_level_80211h; 3211 int new_ap_level; 3212 __le16 capab = mgmt->u.probe_resp.capab_info; 3213 3214 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3215 return 0; /* TODO */ 3216 3217 if (country_ie && 3218 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3219 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3220 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3221 channel, country_ie, country_ie_len, 3222 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3223 pwr_level_80211h = 3224 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3225 } 3226 3227 if (cisco_dtpc_ie) { 3228 ieee80211_find_cisco_dtpc( 3229 channel, cisco_dtpc_ie, &pwr_level_cisco); 3230 has_cisco_pwr = true; 3231 } 3232 3233 if (!has_80211h_pwr && !has_cisco_pwr) 3234 return 0; 3235 3236 /* If we have both 802.11h and Cisco DTPC, apply both limits 3237 * by picking the smallest of the two power levels advertised. 3238 */ 3239 if (has_80211h_pwr && 3240 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3241 new_ap_level = pwr_level_80211h; 3242 3243 if (link->ap_power_level == new_ap_level) 3244 return 0; 3245 3246 sdata_dbg(sdata, 3247 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3248 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3249 link->u.mgd.bssid); 3250 } else { /* has_cisco_pwr is always true here. */ 3251 new_ap_level = pwr_level_cisco; 3252 3253 if (link->ap_power_level == new_ap_level) 3254 return 0; 3255 3256 sdata_dbg(sdata, 3257 "Limiting TX power to %d dBm as advertised by %pM\n", 3258 pwr_level_cisco, link->u.mgd.bssid); 3259 } 3260 3261 link->ap_power_level = new_ap_level; 3262 if (__ieee80211_recalc_txpower(link)) 3263 return BSS_CHANGED_TXPOWER; 3264 return 0; 3265 } 3266 3267 /* powersave */ 3268 static void ieee80211_enable_ps(struct ieee80211_local *local, 3269 struct ieee80211_sub_if_data *sdata) 3270 { 3271 struct ieee80211_conf *conf = &local->hw.conf; 3272 3273 /* 3274 * If we are scanning right now then the parameters will 3275 * take effect when scan finishes. 3276 */ 3277 if (local->scanning) 3278 return; 3279 3280 if (conf->dynamic_ps_timeout > 0 && 3281 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3282 mod_timer(&local->dynamic_ps_timer, jiffies + 3283 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3284 } else { 3285 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3286 ieee80211_send_nullfunc(local, sdata, true); 3287 3288 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3289 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3290 return; 3291 3292 conf->flags |= IEEE80211_CONF_PS; 3293 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3294 } 3295 } 3296 3297 static void ieee80211_change_ps(struct ieee80211_local *local) 3298 { 3299 struct ieee80211_conf *conf = &local->hw.conf; 3300 3301 if (local->ps_sdata) { 3302 ieee80211_enable_ps(local, local->ps_sdata); 3303 } else if (conf->flags & IEEE80211_CONF_PS) { 3304 conf->flags &= ~IEEE80211_CONF_PS; 3305 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3306 timer_delete_sync(&local->dynamic_ps_timer); 3307 wiphy_work_cancel(local->hw.wiphy, 3308 &local->dynamic_ps_enable_work); 3309 } 3310 } 3311 3312 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3313 { 3314 struct ieee80211_local *local = sdata->local; 3315 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3316 struct sta_info *sta = NULL; 3317 bool authorized = false; 3318 3319 if (!mgd->powersave) 3320 return false; 3321 3322 if (mgd->broken_ap) 3323 return false; 3324 3325 if (!mgd->associated) 3326 return false; 3327 3328 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3329 return false; 3330 3331 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3332 !sdata->deflink.u.mgd.have_beacon) 3333 return false; 3334 3335 rcu_read_lock(); 3336 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3337 if (sta) 3338 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3339 rcu_read_unlock(); 3340 3341 return authorized; 3342 } 3343 3344 /* need to hold RTNL or interface lock */ 3345 void ieee80211_recalc_ps(struct ieee80211_local *local) 3346 { 3347 struct ieee80211_sub_if_data *sdata, *found = NULL; 3348 int count = 0; 3349 int timeout; 3350 3351 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3352 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3353 local->ps_sdata = NULL; 3354 return; 3355 } 3356 3357 list_for_each_entry(sdata, &local->interfaces, list) { 3358 if (!ieee80211_sdata_running(sdata)) 3359 continue; 3360 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3361 /* If an AP vif is found, then disable PS 3362 * by setting the count to zero thereby setting 3363 * ps_sdata to NULL. 3364 */ 3365 count = 0; 3366 break; 3367 } 3368 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3369 continue; 3370 found = sdata; 3371 count++; 3372 } 3373 3374 if (count == 1 && ieee80211_powersave_allowed(found)) { 3375 u8 dtimper = found->deflink.u.mgd.dtim_period; 3376 3377 timeout = local->dynamic_ps_forced_timeout; 3378 if (timeout < 0) 3379 timeout = 100; 3380 local->hw.conf.dynamic_ps_timeout = timeout; 3381 3382 /* If the TIM IE is invalid, pretend the value is 1 */ 3383 if (!dtimper) 3384 dtimper = 1; 3385 3386 local->hw.conf.ps_dtim_period = dtimper; 3387 local->ps_sdata = found; 3388 } else { 3389 local->ps_sdata = NULL; 3390 } 3391 3392 ieee80211_change_ps(local); 3393 } 3394 3395 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3396 { 3397 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3398 3399 if (sdata->vif.cfg.ps != ps_allowed) { 3400 sdata->vif.cfg.ps = ps_allowed; 3401 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3402 } 3403 } 3404 3405 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3406 struct wiphy_work *work) 3407 { 3408 struct ieee80211_local *local = 3409 container_of(work, struct ieee80211_local, 3410 dynamic_ps_disable_work); 3411 3412 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3413 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3414 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3415 } 3416 3417 ieee80211_wake_queues_by_reason(&local->hw, 3418 IEEE80211_MAX_QUEUE_MAP, 3419 IEEE80211_QUEUE_STOP_REASON_PS, 3420 false); 3421 } 3422 3423 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3424 struct wiphy_work *work) 3425 { 3426 struct ieee80211_local *local = 3427 container_of(work, struct ieee80211_local, 3428 dynamic_ps_enable_work); 3429 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3430 struct ieee80211_if_managed *ifmgd; 3431 unsigned long flags; 3432 int q; 3433 3434 /* can only happen when PS was just disabled anyway */ 3435 if (!sdata) 3436 return; 3437 3438 ifmgd = &sdata->u.mgd; 3439 3440 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3441 return; 3442 3443 if (local->hw.conf.dynamic_ps_timeout > 0) { 3444 /* don't enter PS if TX frames are pending */ 3445 if (drv_tx_frames_pending(local)) { 3446 mod_timer(&local->dynamic_ps_timer, jiffies + 3447 msecs_to_jiffies( 3448 local->hw.conf.dynamic_ps_timeout)); 3449 return; 3450 } 3451 3452 /* 3453 * transmission can be stopped by others which leads to 3454 * dynamic_ps_timer expiry. Postpone the ps timer if it 3455 * is not the actual idle state. 3456 */ 3457 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3458 for (q = 0; q < local->hw.queues; q++) { 3459 if (local->queue_stop_reasons[q]) { 3460 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3461 flags); 3462 mod_timer(&local->dynamic_ps_timer, jiffies + 3463 msecs_to_jiffies( 3464 local->hw.conf.dynamic_ps_timeout)); 3465 return; 3466 } 3467 } 3468 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3469 } 3470 3471 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3472 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3473 if (drv_tx_frames_pending(local)) { 3474 mod_timer(&local->dynamic_ps_timer, jiffies + 3475 msecs_to_jiffies( 3476 local->hw.conf.dynamic_ps_timeout)); 3477 } else { 3478 ieee80211_send_nullfunc(local, sdata, true); 3479 /* Flush to get the tx status of nullfunc frame */ 3480 ieee80211_flush_queues(local, sdata, false); 3481 } 3482 } 3483 3484 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3485 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3486 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3487 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3488 local->hw.conf.flags |= IEEE80211_CONF_PS; 3489 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3490 } 3491 } 3492 3493 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3494 { 3495 struct ieee80211_local *local = timer_container_of(local, t, 3496 dynamic_ps_timer); 3497 3498 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3499 } 3500 3501 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3502 { 3503 struct ieee80211_link_data *link = 3504 container_of(work, struct ieee80211_link_data, 3505 dfs_cac_timer_work.work); 3506 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3507 struct ieee80211_sub_if_data *sdata = link->sdata; 3508 3509 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3510 3511 if (sdata->wdev.links[link->link_id].cac_started) { 3512 ieee80211_link_release_channel(link); 3513 cfg80211_cac_event(sdata->dev, &chandef, 3514 NL80211_RADAR_CAC_FINISHED, 3515 GFP_KERNEL, link->link_id); 3516 } 3517 } 3518 3519 static bool 3520 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3521 { 3522 struct ieee80211_local *local = sdata->local; 3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3524 bool ret = false; 3525 int ac; 3526 3527 if (local->hw.queues < IEEE80211_NUM_ACS) 3528 return false; 3529 3530 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3531 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3532 int non_acm_ac; 3533 unsigned long now = jiffies; 3534 3535 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3536 tx_tspec->admitted_time && 3537 time_after(now, tx_tspec->time_slice_start + HZ)) { 3538 tx_tspec->consumed_tx_time = 0; 3539 tx_tspec->time_slice_start = now; 3540 3541 if (tx_tspec->downgraded) 3542 tx_tspec->action = 3543 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3544 } 3545 3546 switch (tx_tspec->action) { 3547 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3548 /* take the original parameters */ 3549 if (drv_conf_tx(local, &sdata->deflink, ac, 3550 &sdata->deflink.tx_conf[ac])) 3551 link_err(&sdata->deflink, 3552 "failed to set TX queue parameters for queue %d\n", 3553 ac); 3554 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3555 tx_tspec->downgraded = false; 3556 ret = true; 3557 break; 3558 case TX_TSPEC_ACTION_DOWNGRADE: 3559 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3560 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3561 ret = true; 3562 break; 3563 } 3564 /* downgrade next lower non-ACM AC */ 3565 for (non_acm_ac = ac + 1; 3566 non_acm_ac < IEEE80211_NUM_ACS; 3567 non_acm_ac++) 3568 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3569 break; 3570 /* Usually the loop will result in using BK even if it 3571 * requires admission control, but such a configuration 3572 * makes no sense and we have to transmit somehow - the 3573 * AC selection does the same thing. 3574 * If we started out trying to downgrade from BK, then 3575 * the extra condition here might be needed. 3576 */ 3577 if (non_acm_ac >= IEEE80211_NUM_ACS) 3578 non_acm_ac = IEEE80211_AC_BK; 3579 if (drv_conf_tx(local, &sdata->deflink, ac, 3580 &sdata->deflink.tx_conf[non_acm_ac])) 3581 link_err(&sdata->deflink, 3582 "failed to set TX queue parameters for queue %d\n", 3583 ac); 3584 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3585 ret = true; 3586 wiphy_delayed_work_queue(local->hw.wiphy, 3587 &ifmgd->tx_tspec_wk, 3588 tx_tspec->time_slice_start + 3589 HZ - now + 1); 3590 break; 3591 case TX_TSPEC_ACTION_NONE: 3592 /* nothing now */ 3593 break; 3594 } 3595 } 3596 3597 return ret; 3598 } 3599 3600 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3601 { 3602 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3603 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3604 BSS_CHANGED_QOS); 3605 } 3606 3607 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3608 struct wiphy_work *work) 3609 { 3610 struct ieee80211_sub_if_data *sdata; 3611 3612 sdata = container_of(work, struct ieee80211_sub_if_data, 3613 u.mgd.tx_tspec_wk.work); 3614 ieee80211_sta_handle_tspec_ac_params(sdata); 3615 } 3616 3617 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3618 { 3619 struct ieee80211_sub_if_data *sdata = link->sdata; 3620 struct ieee80211_local *local = sdata->local; 3621 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3622 struct ieee80211_tx_queue_params *params = link->tx_conf; 3623 u8 ac; 3624 3625 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3626 mlme_dbg(sdata, 3627 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3628 ac, params[ac].acm, 3629 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3630 params[ac].txop, params[ac].uapsd, 3631 ifmgd->tx_tspec[ac].downgraded); 3632 if (!ifmgd->tx_tspec[ac].downgraded && 3633 drv_conf_tx(local, link, ac, ¶ms[ac])) 3634 link_err(link, 3635 "failed to set TX queue parameters for AC %d\n", 3636 ac); 3637 } 3638 } 3639 3640 /* MLME */ 3641 static bool 3642 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3643 struct ieee80211_link_data *link, 3644 const u8 *wmm_param, size_t wmm_param_len, 3645 const struct ieee80211_mu_edca_param_set *mu_edca) 3646 { 3647 struct ieee80211_sub_if_data *sdata = link->sdata; 3648 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3649 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3650 size_t left; 3651 int count, mu_edca_count, ac; 3652 const u8 *pos; 3653 u8 uapsd_queues = 0; 3654 3655 if (!local->ops->conf_tx) 3656 return false; 3657 3658 if (local->hw.queues < IEEE80211_NUM_ACS) 3659 return false; 3660 3661 if (!wmm_param) 3662 return false; 3663 3664 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3665 return false; 3666 3667 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3668 uapsd_queues = ifmgd->uapsd_queues; 3669 3670 count = wmm_param[6] & 0x0f; 3671 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3672 * if mu_edca was preset before and now it disappeared tell 3673 * the driver about it. 3674 */ 3675 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3676 if (count == link->u.mgd.wmm_last_param_set && 3677 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3678 return false; 3679 link->u.mgd.wmm_last_param_set = count; 3680 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3681 3682 pos = wmm_param + 8; 3683 left = wmm_param_len - 8; 3684 3685 memset(¶ms, 0, sizeof(params)); 3686 3687 sdata->wmm_acm = 0; 3688 for (; left >= 4; left -= 4, pos += 4) { 3689 int aci = (pos[0] >> 5) & 0x03; 3690 int acm = (pos[0] >> 4) & 0x01; 3691 bool uapsd = false; 3692 3693 switch (aci) { 3694 case 1: /* AC_BK */ 3695 ac = IEEE80211_AC_BK; 3696 if (acm) 3697 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3698 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3699 uapsd = true; 3700 params[ac].mu_edca = !!mu_edca; 3701 if (mu_edca) 3702 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3703 break; 3704 case 2: /* AC_VI */ 3705 ac = IEEE80211_AC_VI; 3706 if (acm) 3707 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3708 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3709 uapsd = true; 3710 params[ac].mu_edca = !!mu_edca; 3711 if (mu_edca) 3712 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3713 break; 3714 case 3: /* AC_VO */ 3715 ac = IEEE80211_AC_VO; 3716 if (acm) 3717 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3718 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3719 uapsd = true; 3720 params[ac].mu_edca = !!mu_edca; 3721 if (mu_edca) 3722 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3723 break; 3724 case 0: /* AC_BE */ 3725 default: 3726 ac = IEEE80211_AC_BE; 3727 if (acm) 3728 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3729 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3730 uapsd = true; 3731 params[ac].mu_edca = !!mu_edca; 3732 if (mu_edca) 3733 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3734 break; 3735 } 3736 3737 params[ac].aifs = pos[0] & 0x0f; 3738 3739 if (params[ac].aifs < 2) { 3740 link_info(link, 3741 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3742 params[ac].aifs, aci); 3743 params[ac].aifs = 2; 3744 } 3745 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3746 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3747 params[ac].txop = get_unaligned_le16(pos + 2); 3748 params[ac].acm = acm; 3749 params[ac].uapsd = uapsd; 3750 3751 if (params[ac].cw_min == 0 || 3752 params[ac].cw_min > params[ac].cw_max) { 3753 link_info(link, 3754 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3755 params[ac].cw_min, params[ac].cw_max, aci); 3756 return false; 3757 } 3758 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3759 } 3760 3761 /* WMM specification requires all 4 ACIs. */ 3762 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3763 if (params[ac].cw_min == 0) { 3764 link_info(link, 3765 "AP has invalid WMM params (missing AC %d), using defaults\n", 3766 ac); 3767 return false; 3768 } 3769 } 3770 3771 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3772 link->tx_conf[ac] = params[ac]; 3773 3774 return true; 3775 } 3776 3777 static bool 3778 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3779 struct ieee80211_link_data *link, 3780 const u8 *wmm_param, size_t wmm_param_len, 3781 const struct ieee80211_mu_edca_param_set *mu_edca) 3782 { 3783 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3784 mu_edca)) 3785 return false; 3786 3787 ieee80211_mgd_set_link_qos_params(link); 3788 3789 /* enable WMM or activate new settings */ 3790 link->conf->qos = true; 3791 return true; 3792 } 3793 3794 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3795 { 3796 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3797 3798 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3799 ieee80211_run_deferred_scan(sdata->local); 3800 } 3801 3802 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3803 { 3804 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3805 3806 __ieee80211_stop_poll(sdata); 3807 } 3808 3809 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3810 u16 capab, bool erp_valid, u8 erp) 3811 { 3812 struct ieee80211_bss_conf *bss_conf = link->conf; 3813 struct ieee80211_supported_band *sband; 3814 u64 changed = 0; 3815 bool use_protection; 3816 bool use_short_preamble; 3817 bool use_short_slot; 3818 3819 sband = ieee80211_get_link_sband(link); 3820 if (!sband) 3821 return changed; 3822 3823 if (erp_valid) { 3824 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3825 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3826 } else { 3827 use_protection = false; 3828 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3829 } 3830 3831 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3832 if (sband->band == NL80211_BAND_5GHZ || 3833 sband->band == NL80211_BAND_6GHZ) 3834 use_short_slot = true; 3835 3836 if (use_protection != bss_conf->use_cts_prot) { 3837 bss_conf->use_cts_prot = use_protection; 3838 changed |= BSS_CHANGED_ERP_CTS_PROT; 3839 } 3840 3841 if (use_short_preamble != bss_conf->use_short_preamble) { 3842 bss_conf->use_short_preamble = use_short_preamble; 3843 changed |= BSS_CHANGED_ERP_PREAMBLE; 3844 } 3845 3846 if (use_short_slot != bss_conf->use_short_slot) { 3847 bss_conf->use_short_slot = use_short_slot; 3848 changed |= BSS_CHANGED_ERP_SLOT; 3849 } 3850 3851 return changed; 3852 } 3853 3854 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3855 struct cfg80211_bss *cbss) 3856 { 3857 struct ieee80211_sub_if_data *sdata = link->sdata; 3858 struct ieee80211_bss_conf *bss_conf = link->conf; 3859 struct ieee80211_bss *bss = (void *)cbss->priv; 3860 u64 changed = BSS_CHANGED_QOS; 3861 3862 /* not really used in MLO */ 3863 sdata->u.mgd.beacon_timeout = 3864 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3865 bss_conf->beacon_int)); 3866 3867 changed |= ieee80211_handle_bss_capability(link, 3868 bss_conf->assoc_capability, 3869 bss->has_erp_value, 3870 bss->erp_value); 3871 3872 ieee80211_check_rate_mask(link); 3873 3874 link->conf->bss = cbss; 3875 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3876 3877 if (sdata->vif.p2p || 3878 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3879 const struct cfg80211_bss_ies *ies; 3880 3881 rcu_read_lock(); 3882 ies = rcu_dereference(cbss->ies); 3883 if (ies) { 3884 int ret; 3885 3886 ret = cfg80211_get_p2p_attr( 3887 ies->data, ies->len, 3888 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3889 (u8 *) &bss_conf->p2p_noa_attr, 3890 sizeof(bss_conf->p2p_noa_attr)); 3891 if (ret >= 2) { 3892 link->u.mgd.p2p_noa_index = 3893 bss_conf->p2p_noa_attr.index; 3894 changed |= BSS_CHANGED_P2P_PS; 3895 } 3896 } 3897 rcu_read_unlock(); 3898 } 3899 3900 if (link->u.mgd.have_beacon) { 3901 bss_conf->beacon_rate = bss->beacon_rate; 3902 changed |= BSS_CHANGED_BEACON_INFO; 3903 } else { 3904 bss_conf->beacon_rate = NULL; 3905 } 3906 3907 /* Tell the driver to monitor connection quality (if supported) */ 3908 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3909 bss_conf->cqm_rssi_thold) 3910 changed |= BSS_CHANGED_CQM; 3911 3912 return changed; 3913 } 3914 3915 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3916 struct ieee80211_mgd_assoc_data *assoc_data, 3917 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3918 { 3919 struct ieee80211_local *local = sdata->local; 3920 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3921 u64 vif_changed = BSS_CHANGED_ASSOC; 3922 unsigned int link_id; 3923 3924 lockdep_assert_wiphy(local->hw.wiphy); 3925 3926 sdata->u.mgd.associated = true; 3927 3928 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3929 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3930 struct ieee80211_link_data *link; 3931 3932 if (!cbss || 3933 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3934 continue; 3935 3936 if (ieee80211_vif_is_mld(&sdata->vif) && 3937 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3938 continue; 3939 3940 link = sdata_dereference(sdata->link[link_id], sdata); 3941 if (WARN_ON(!link)) 3942 return; 3943 3944 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3945 } 3946 3947 /* just to be sure */ 3948 ieee80211_stop_poll(sdata); 3949 3950 ieee80211_led_assoc(local, 1); 3951 3952 vif_cfg->assoc = 1; 3953 3954 /* Enable ARP filtering */ 3955 if (vif_cfg->arp_addr_cnt) 3956 vif_changed |= BSS_CHANGED_ARP_FILTER; 3957 3958 if (ieee80211_vif_is_mld(&sdata->vif)) { 3959 for (link_id = 0; 3960 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3961 link_id++) { 3962 struct ieee80211_link_data *link; 3963 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3964 3965 if (!cbss || 3966 !(BIT(link_id) & 3967 ieee80211_vif_usable_links(&sdata->vif)) || 3968 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3969 continue; 3970 3971 link = sdata_dereference(sdata->link[link_id], sdata); 3972 if (WARN_ON(!link)) 3973 return; 3974 3975 ieee80211_link_info_change_notify(sdata, link, 3976 changed[link_id]); 3977 3978 ieee80211_recalc_smps(sdata, link); 3979 } 3980 3981 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3982 } else { 3983 ieee80211_bss_info_change_notify(sdata, 3984 vif_changed | changed[0]); 3985 } 3986 3987 ieee80211_recalc_ps(local); 3988 3989 /* leave this here to not change ordering in non-MLO cases */ 3990 if (!ieee80211_vif_is_mld(&sdata->vif)) 3991 ieee80211_recalc_smps(sdata, &sdata->deflink); 3992 ieee80211_recalc_ps_vif(sdata); 3993 3994 netif_carrier_on(sdata->dev); 3995 } 3996 3997 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3998 { 3999 struct ieee80211_mgd_assoc_data *add_links_data = 4000 sdata->u.mgd.reconf.add_links_data; 4001 4002 if (!ieee80211_vif_is_mld(&sdata->vif) || 4003 !(sdata->u.mgd.reconf.added_links | 4004 sdata->u.mgd.reconf.removed_links)) 4005 return; 4006 4007 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4008 &sdata->u.mgd.reconf.wk); 4009 sdata->u.mgd.reconf.added_links = 0; 4010 sdata->u.mgd.reconf.removed_links = 0; 4011 sdata->u.mgd.reconf.dialog_token = 0; 4012 4013 if (add_links_data) { 4014 struct cfg80211_mlo_reconf_done_data done_data = {}; 4015 u8 link_id; 4016 4017 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 4018 link_id++) 4019 done_data.links[link_id].bss = 4020 add_links_data->link[link_id].bss; 4021 4022 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 4023 4024 kfree(sdata->u.mgd.reconf.add_links_data); 4025 sdata->u.mgd.reconf.add_links_data = NULL; 4026 } 4027 } 4028 4029 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 4030 u16 stype, u16 reason, bool tx, 4031 u8 *frame_buf) 4032 { 4033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4034 struct ieee80211_local *local = sdata->local; 4035 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 4036 unsigned int link_id; 4037 u64 changed = 0; 4038 struct ieee80211_prep_tx_info info = { 4039 .subtype = stype, 4040 .was_assoc = true, 4041 .link_id = ffs(sdata->vif.active_links) - 1, 4042 }; 4043 4044 lockdep_assert_wiphy(local->hw.wiphy); 4045 4046 if (frame_buf) 4047 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4048 4049 if (WARN_ON(!ap_sta)) 4050 return; 4051 4052 if (WARN_ON_ONCE(tx && !frame_buf)) 4053 return; 4054 4055 if (WARN_ON(!ifmgd->associated)) 4056 return; 4057 4058 ieee80211_stop_poll(sdata); 4059 4060 ifmgd->associated = false; 4061 4062 if (tx) { 4063 bool tx_link_found = false; 4064 4065 for (link_id = 0; 4066 link_id < ARRAY_SIZE(sdata->link); 4067 link_id++) { 4068 struct ieee80211_link_data *link; 4069 4070 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4071 continue; 4072 4073 link = sdata_dereference(sdata->link[link_id], sdata); 4074 if (WARN_ON_ONCE(!link)) 4075 continue; 4076 4077 if (link->u.mgd.csa.blocked_tx) 4078 continue; 4079 4080 tx_link_found = true; 4081 break; 4082 } 4083 4084 tx = tx_link_found; 4085 } 4086 4087 /* other links will be destroyed */ 4088 sdata->deflink.conf->bss = NULL; 4089 sdata->deflink.conf->epcs_support = false; 4090 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4091 4092 netif_carrier_off(sdata->dev); 4093 4094 /* 4095 * if we want to get out of ps before disassoc (why?) we have 4096 * to do it before sending disassoc, as otherwise the null-packet 4097 * won't be valid. 4098 */ 4099 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4100 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4101 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4102 } 4103 local->ps_sdata = NULL; 4104 4105 /* disable per-vif ps */ 4106 ieee80211_recalc_ps_vif(sdata); 4107 4108 /* make sure ongoing transmission finishes */ 4109 synchronize_net(); 4110 4111 /* 4112 * drop any frame before deauth/disassoc, this can be data or 4113 * management frame. Since we are disconnecting, we should not 4114 * insist sending these frames which can take time and delay 4115 * the disconnection and possible the roaming. 4116 */ 4117 ieee80211_flush_queues(local, sdata, true); 4118 4119 if (tx) { 4120 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4121 4122 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4123 sdata->vif.cfg.ap_addr, stype, 4124 reason, true, frame_buf); 4125 4126 /* flush out frame - make sure the deauth was actually sent */ 4127 ieee80211_flush_queues(local, sdata, false); 4128 4129 drv_mgd_complete_tx(sdata->local, sdata, &info); 4130 } else if (frame_buf) { 4131 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4132 sdata->vif.cfg.ap_addr, stype, 4133 reason, false, frame_buf); 4134 } 4135 4136 /* clear AP addr only after building the needed mgmt frames */ 4137 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4138 eth_zero_addr(sdata->vif.cfg.ap_addr); 4139 4140 sdata->vif.cfg.ssid_len = 0; 4141 4142 /* Remove TDLS peers */ 4143 __sta_info_flush(sdata, false, -1, ap_sta); 4144 4145 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4146 /* Only move the AP state */ 4147 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4148 } else { 4149 /* Remove AP peer */ 4150 sta_info_flush(sdata, -1); 4151 } 4152 4153 /* finally reset all BSS / config parameters */ 4154 if (!ieee80211_vif_is_mld(&sdata->vif)) 4155 changed |= ieee80211_reset_erp_info(sdata); 4156 4157 ieee80211_led_assoc(local, 0); 4158 changed |= BSS_CHANGED_ASSOC; 4159 sdata->vif.cfg.assoc = false; 4160 4161 sdata->deflink.u.mgd.p2p_noa_index = -1; 4162 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4163 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4164 4165 /* on the next assoc, re-program HT/VHT parameters */ 4166 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4167 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4168 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4169 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4170 4171 /* 4172 * reset MU-MIMO ownership and group data in default link, 4173 * if used, other links are destroyed 4174 */ 4175 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4176 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4177 memset(sdata->vif.bss_conf.mu_group.position, 0, 4178 sizeof(sdata->vif.bss_conf.mu_group.position)); 4179 if (!ieee80211_vif_is_mld(&sdata->vif)) 4180 changed |= BSS_CHANGED_MU_GROUPS; 4181 sdata->vif.bss_conf.mu_mimo_owner = false; 4182 4183 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4184 4185 timer_delete_sync(&local->dynamic_ps_timer); 4186 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4187 4188 /* Disable ARP filtering */ 4189 if (sdata->vif.cfg.arp_addr_cnt) 4190 changed |= BSS_CHANGED_ARP_FILTER; 4191 4192 sdata->vif.bss_conf.qos = false; 4193 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4194 changed |= BSS_CHANGED_QOS; 4195 /* The BSSID (not really interesting) and HT changed */ 4196 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4197 ieee80211_bss_info_change_notify(sdata, changed); 4198 } else { 4199 ieee80211_vif_cfg_change_notify(sdata, changed); 4200 } 4201 4202 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4203 /* 4204 * After notifying the driver about the disassoc, 4205 * remove the ap sta. 4206 */ 4207 sta_info_flush(sdata, -1); 4208 } 4209 4210 /* disassociated - set to defaults now */ 4211 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4212 4213 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4214 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4215 timer_delete_sync(&sdata->u.mgd.timer); 4216 4217 sdata->vif.bss_conf.dtim_period = 0; 4218 sdata->vif.bss_conf.beacon_rate = NULL; 4219 4220 sdata->deflink.u.mgd.have_beacon = false; 4221 sdata->deflink.u.mgd.tracking_signal_avg = false; 4222 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4223 4224 ifmgd->flags = 0; 4225 4226 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4227 struct ieee80211_link_data *link; 4228 4229 link = sdata_dereference(sdata->link[link_id], sdata); 4230 if (!link) 4231 continue; 4232 ieee80211_link_release_channel(link); 4233 } 4234 4235 sdata->vif.bss_conf.csa_active = false; 4236 sdata->deflink.u.mgd.csa.blocked_tx = false; 4237 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4238 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4239 ieee80211_vif_unblock_queues_csa(sdata); 4240 4241 /* existing TX TSPEC sessions no longer exist */ 4242 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4243 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4244 4245 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4246 sdata->vif.bss_conf.pwr_reduction = 0; 4247 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4248 4249 sdata->vif.cfg.eml_cap = 0; 4250 sdata->vif.cfg.eml_med_sync_delay = 0; 4251 sdata->vif.cfg.mld_capa_op = 0; 4252 4253 memset(&sdata->u.mgd.ttlm_info, 0, 4254 sizeof(sdata->u.mgd.ttlm_info)); 4255 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4256 4257 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4258 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4259 &ifmgd->neg_ttlm_timeout_work); 4260 4261 sdata->u.mgd.removed_links = 0; 4262 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 4263 &sdata->u.mgd.ml_reconf_work); 4264 4265 wiphy_work_cancel(sdata->local->hw.wiphy, 4266 &ifmgd->teardown_ttlm_work); 4267 4268 /* if disconnection happens in the middle of the ML reconfiguration 4269 * flow, cfg80211 must called to release the BSS references obtained 4270 * when the flow started. 4271 */ 4272 ieee80211_ml_reconf_reset(sdata); 4273 4274 ieee80211_vif_set_links(sdata, 0, 0); 4275 4276 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4277 4278 ifmgd->epcs.enabled = false; 4279 ifmgd->epcs.dialog_token = 0; 4280 4281 memset(ifmgd->userspace_selectors, 0, 4282 sizeof(ifmgd->userspace_selectors)); 4283 } 4284 4285 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4286 { 4287 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4288 struct ieee80211_local *local = sdata->local; 4289 4290 lockdep_assert_wiphy(local->hw.wiphy); 4291 4292 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4293 return; 4294 4295 __ieee80211_stop_poll(sdata); 4296 4297 ieee80211_recalc_ps(local); 4298 4299 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4300 return; 4301 4302 /* 4303 * We've received a probe response, but are not sure whether 4304 * we have or will be receiving any beacons or data, so let's 4305 * schedule the timers again, just in case. 4306 */ 4307 ieee80211_sta_reset_beacon_monitor(sdata); 4308 4309 mod_timer(&ifmgd->conn_mon_timer, 4310 round_jiffies_up(jiffies + 4311 IEEE80211_CONNECTION_IDLE_TIME)); 4312 } 4313 4314 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4315 struct ieee80211_hdr *hdr, 4316 u16 tx_time) 4317 { 4318 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4319 u16 tid; 4320 int ac; 4321 struct ieee80211_sta_tx_tspec *tx_tspec; 4322 unsigned long now = jiffies; 4323 4324 if (!ieee80211_is_data_qos(hdr->frame_control)) 4325 return; 4326 4327 tid = ieee80211_get_tid(hdr); 4328 ac = ieee80211_ac_from_tid(tid); 4329 tx_tspec = &ifmgd->tx_tspec[ac]; 4330 4331 if (likely(!tx_tspec->admitted_time)) 4332 return; 4333 4334 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4335 tx_tspec->consumed_tx_time = 0; 4336 tx_tspec->time_slice_start = now; 4337 4338 if (tx_tspec->downgraded) { 4339 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4340 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4341 &ifmgd->tx_tspec_wk, 0); 4342 } 4343 } 4344 4345 if (tx_tspec->downgraded) 4346 return; 4347 4348 tx_tspec->consumed_tx_time += tx_time; 4349 4350 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4351 tx_tspec->downgraded = true; 4352 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4353 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4354 &ifmgd->tx_tspec_wk, 0); 4355 } 4356 } 4357 4358 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4359 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4360 { 4361 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4362 4363 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4364 !sdata->u.mgd.probe_send_count) 4365 return; 4366 4367 if (ack) 4368 sdata->u.mgd.probe_send_count = 0; 4369 else 4370 sdata->u.mgd.nullfunc_failed = true; 4371 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4372 } 4373 4374 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4375 const u8 *src, const u8 *dst, 4376 const u8 *ssid, size_t ssid_len, 4377 struct ieee80211_channel *channel) 4378 { 4379 struct sk_buff *skb; 4380 4381 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4382 ssid, ssid_len, NULL, 0, 4383 IEEE80211_PROBE_FLAG_DIRECTED); 4384 if (skb) 4385 ieee80211_tx_skb(sdata, skb); 4386 } 4387 4388 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4389 { 4390 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4391 u8 *dst = sdata->vif.cfg.ap_addr; 4392 u8 unicast_limit = max(1, max_probe_tries - 3); 4393 struct sta_info *sta; 4394 4395 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4396 4397 /* 4398 * Try sending broadcast probe requests for the last three 4399 * probe requests after the first ones failed since some 4400 * buggy APs only support broadcast probe requests. 4401 */ 4402 if (ifmgd->probe_send_count >= unicast_limit) 4403 dst = NULL; 4404 4405 /* 4406 * When the hardware reports an accurate Tx ACK status, it's 4407 * better to send a nullfunc frame instead of a probe request, 4408 * as it will kick us off the AP quickly if we aren't associated 4409 * anymore. The timeout will be reset if the frame is ACKed by 4410 * the AP. 4411 */ 4412 ifmgd->probe_send_count++; 4413 4414 if (dst) { 4415 sta = sta_info_get(sdata, dst); 4416 if (!WARN_ON(!sta)) 4417 ieee80211_check_fast_rx(sta); 4418 } 4419 4420 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4421 ifmgd->nullfunc_failed = false; 4422 ieee80211_send_nullfunc(sdata->local, sdata, false); 4423 } else { 4424 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4425 sdata->vif.cfg.ssid, 4426 sdata->vif.cfg.ssid_len, 4427 sdata->deflink.conf->bss->channel); 4428 } 4429 4430 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4431 run_again(sdata, ifmgd->probe_timeout); 4432 } 4433 4434 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4435 bool beacon) 4436 { 4437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4438 bool already = false; 4439 4440 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4441 4442 if (!ieee80211_sdata_running(sdata)) 4443 return; 4444 4445 if (!ifmgd->associated) 4446 return; 4447 4448 if (sdata->local->tmp_channel || sdata->local->scanning) 4449 return; 4450 4451 if (sdata->local->suspending) { 4452 /* reschedule after resume */ 4453 ieee80211_reset_ap_probe(sdata); 4454 return; 4455 } 4456 4457 if (beacon) { 4458 mlme_dbg_ratelimited(sdata, 4459 "detected beacon loss from AP (missed %d beacons) - probing\n", 4460 beacon_loss_count); 4461 4462 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4463 } 4464 4465 /* 4466 * The driver/our work has already reported this event or the 4467 * connection monitoring has kicked in and we have already sent 4468 * a probe request. Or maybe the AP died and the driver keeps 4469 * reporting until we disassociate... 4470 * 4471 * In either case we have to ignore the current call to this 4472 * function (except for setting the correct probe reason bit) 4473 * because otherwise we would reset the timer every time and 4474 * never check whether we received a probe response! 4475 */ 4476 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4477 already = true; 4478 4479 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4480 4481 if (already) 4482 return; 4483 4484 ieee80211_recalc_ps(sdata->local); 4485 4486 ifmgd->probe_send_count = 0; 4487 ieee80211_mgd_probe_ap_send(sdata); 4488 } 4489 4490 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4491 struct ieee80211_vif *vif) 4492 { 4493 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4494 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4495 struct cfg80211_bss *cbss; 4496 struct sk_buff *skb; 4497 const struct element *ssid; 4498 int ssid_len; 4499 4500 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4501 4502 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4503 ieee80211_vif_is_mld(&sdata->vif))) 4504 return NULL; 4505 4506 if (ifmgd->associated) 4507 cbss = sdata->deflink.conf->bss; 4508 else if (ifmgd->auth_data) 4509 cbss = ifmgd->auth_data->bss; 4510 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4511 cbss = ifmgd->assoc_data->link[0].bss; 4512 else 4513 return NULL; 4514 4515 rcu_read_lock(); 4516 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4517 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4518 "invalid SSID element (len=%d)", 4519 ssid ? ssid->datalen : -1)) 4520 ssid_len = 0; 4521 else 4522 ssid_len = ssid->datalen; 4523 4524 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4525 (u32) -1, cbss->channel, 4526 ssid->data, ssid_len, 4527 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4528 rcu_read_unlock(); 4529 4530 return skb; 4531 } 4532 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4533 4534 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4535 const u8 *buf, size_t len, bool tx, 4536 u16 reason, bool reconnect) 4537 { 4538 struct ieee80211_event event = { 4539 .type = MLME_EVENT, 4540 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4541 .u.mlme.reason = reason, 4542 }; 4543 4544 if (tx) 4545 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4546 else 4547 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4548 4549 drv_event_callback(sdata->local, sdata, &event); 4550 } 4551 4552 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4553 { 4554 struct ieee80211_local *local = sdata->local; 4555 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4556 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4557 4558 lockdep_assert_wiphy(local->hw.wiphy); 4559 4560 if (!ifmgd->associated) 4561 return; 4562 4563 if (!ifmgd->driver_disconnect) { 4564 unsigned int link_id; 4565 4566 /* 4567 * AP is probably out of range (or not reachable for another 4568 * reason) so remove the bss structs for that AP. In the case 4569 * of multi-link, it's not clear that all of them really are 4570 * out of range, but if they weren't the driver likely would 4571 * have switched to just have a single link active? 4572 */ 4573 for (link_id = 0; 4574 link_id < ARRAY_SIZE(sdata->link); 4575 link_id++) { 4576 struct ieee80211_link_data *link; 4577 4578 link = sdata_dereference(sdata->link[link_id], sdata); 4579 if (!link || !link->conf->bss) 4580 continue; 4581 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4582 link->conf->bss = NULL; 4583 } 4584 } 4585 4586 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4587 ifmgd->driver_disconnect ? 4588 WLAN_REASON_DEAUTH_LEAVING : 4589 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4590 true, frame_buf); 4591 /* the other links will be destroyed */ 4592 sdata->vif.bss_conf.csa_active = false; 4593 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4594 sdata->deflink.u.mgd.csa.blocked_tx = false; 4595 ieee80211_vif_unblock_queues_csa(sdata); 4596 4597 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4598 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4599 ifmgd->reconnect); 4600 ifmgd->reconnect = false; 4601 } 4602 4603 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4604 struct wiphy_work *work) 4605 { 4606 struct ieee80211_sub_if_data *sdata = 4607 container_of(work, struct ieee80211_sub_if_data, 4608 u.mgd.beacon_connection_loss_work); 4609 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4610 4611 if (ifmgd->connection_loss) { 4612 sdata_info(sdata, "Connection to AP %pM lost\n", 4613 sdata->vif.cfg.ap_addr); 4614 __ieee80211_disconnect(sdata); 4615 ifmgd->connection_loss = false; 4616 } else if (ifmgd->driver_disconnect) { 4617 sdata_info(sdata, 4618 "Driver requested disconnection from AP %pM\n", 4619 sdata->vif.cfg.ap_addr); 4620 __ieee80211_disconnect(sdata); 4621 ifmgd->driver_disconnect = false; 4622 } else { 4623 if (ifmgd->associated) 4624 sdata->deflink.u.mgd.beacon_loss_count++; 4625 ieee80211_mgd_probe_ap(sdata, true); 4626 } 4627 } 4628 4629 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4630 struct wiphy_work *work) 4631 { 4632 struct ieee80211_sub_if_data *sdata = 4633 container_of(work, struct ieee80211_sub_if_data, 4634 u.mgd.csa_connection_drop_work); 4635 4636 __ieee80211_disconnect(sdata); 4637 } 4638 4639 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4640 { 4641 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4642 struct ieee80211_hw *hw = &sdata->local->hw; 4643 4644 trace_api_beacon_loss(sdata); 4645 4646 sdata->u.mgd.connection_loss = false; 4647 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4648 } 4649 EXPORT_SYMBOL(ieee80211_beacon_loss); 4650 4651 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4652 { 4653 struct ieee80211_sub_if_data *sdata; 4654 struct ieee80211_hw *hw; 4655 4656 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4657 4658 sdata = vif_to_sdata(vif); 4659 hw = &sdata->local->hw; 4660 4661 trace_api_connection_loss(sdata); 4662 4663 sdata->u.mgd.connection_loss = true; 4664 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4665 } 4666 EXPORT_SYMBOL(ieee80211_connection_loss); 4667 4668 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4669 { 4670 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4671 struct ieee80211_hw *hw = &sdata->local->hw; 4672 4673 trace_api_disconnect(sdata, reconnect); 4674 4675 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4676 return; 4677 4678 sdata->u.mgd.driver_disconnect = true; 4679 sdata->u.mgd.reconnect = reconnect; 4680 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4681 } 4682 EXPORT_SYMBOL(ieee80211_disconnect); 4683 4684 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4685 bool assoc) 4686 { 4687 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4688 4689 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4690 4691 sdata->u.mgd.auth_data = NULL; 4692 4693 if (!assoc) { 4694 /* 4695 * we are not authenticated yet, the only timer that could be 4696 * running is the timeout for the authentication response which 4697 * which is not relevant anymore. 4698 */ 4699 timer_delete_sync(&sdata->u.mgd.timer); 4700 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4701 4702 /* other links are destroyed */ 4703 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4704 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4705 BSS_CHANGED_BSSID); 4706 sdata->u.mgd.flags = 0; 4707 4708 ieee80211_link_release_channel(&sdata->deflink); 4709 ieee80211_vif_set_links(sdata, 0, 0); 4710 } 4711 4712 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4713 kfree(auth_data); 4714 } 4715 4716 enum assoc_status { 4717 ASSOC_SUCCESS, 4718 ASSOC_REJECTED, 4719 ASSOC_TIMEOUT, 4720 ASSOC_ABANDON, 4721 }; 4722 4723 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4724 enum assoc_status status) 4725 { 4726 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4727 4728 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4729 4730 sdata->u.mgd.assoc_data = NULL; 4731 4732 if (status != ASSOC_SUCCESS) { 4733 /* 4734 * we are not associated yet, the only timer that could be 4735 * running is the timeout for the association response which 4736 * which is not relevant anymore. 4737 */ 4738 timer_delete_sync(&sdata->u.mgd.timer); 4739 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4740 4741 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4742 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4743 BSS_CHANGED_BSSID); 4744 sdata->u.mgd.flags = 0; 4745 sdata->vif.bss_conf.mu_mimo_owner = false; 4746 4747 if (status != ASSOC_REJECTED) { 4748 struct cfg80211_assoc_failure data = { 4749 .timeout = status == ASSOC_TIMEOUT, 4750 }; 4751 int i; 4752 4753 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4754 ARRAY_SIZE(assoc_data->link)); 4755 4756 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4757 data.bss[i] = assoc_data->link[i].bss; 4758 4759 if (ieee80211_vif_is_mld(&sdata->vif)) 4760 data.ap_mld_addr = assoc_data->ap_addr; 4761 4762 cfg80211_assoc_failure(sdata->dev, &data); 4763 } 4764 4765 ieee80211_link_release_channel(&sdata->deflink); 4766 ieee80211_vif_set_links(sdata, 0, 0); 4767 } 4768 4769 kfree(assoc_data); 4770 } 4771 4772 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4773 struct ieee80211_mgmt *mgmt, size_t len) 4774 { 4775 struct ieee80211_local *local = sdata->local; 4776 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4777 const struct element *challenge; 4778 u8 *pos; 4779 u32 tx_flags = 0; 4780 struct ieee80211_prep_tx_info info = { 4781 .subtype = IEEE80211_STYPE_AUTH, 4782 .link_id = auth_data->link_id, 4783 }; 4784 4785 pos = mgmt->u.auth.variable; 4786 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4787 len - (pos - (u8 *)mgmt)); 4788 if (!challenge) 4789 return; 4790 auth_data->expected_transaction = 4; 4791 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4792 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4793 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4794 IEEE80211_TX_INTFL_MLME_CONN_TX; 4795 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4796 (void *)challenge, 4797 challenge->datalen + sizeof(*challenge), 4798 auth_data->ap_addr, auth_data->ap_addr, 4799 auth_data->key, auth_data->key_len, 4800 auth_data->key_idx, tx_flags); 4801 } 4802 4803 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4804 { 4805 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4806 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4807 struct sta_info *sta; 4808 4809 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4810 4811 sdata_info(sdata, "authenticated\n"); 4812 ifmgd->auth_data->done = true; 4813 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4814 ifmgd->auth_data->timeout_started = true; 4815 run_again(sdata, ifmgd->auth_data->timeout); 4816 4817 /* move station state to auth */ 4818 sta = sta_info_get(sdata, ap_addr); 4819 if (!sta) { 4820 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4821 return false; 4822 } 4823 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4824 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4825 return false; 4826 } 4827 4828 return true; 4829 } 4830 4831 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4832 struct ieee80211_mgmt *mgmt, size_t len) 4833 { 4834 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4835 u16 auth_alg, auth_transaction, status_code; 4836 struct ieee80211_event event = { 4837 .type = MLME_EVENT, 4838 .u.mlme.data = AUTH_EVENT, 4839 }; 4840 struct ieee80211_prep_tx_info info = { 4841 .subtype = IEEE80211_STYPE_AUTH, 4842 }; 4843 bool sae_need_confirm = false; 4844 4845 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4846 4847 if (len < 24 + 6) 4848 return; 4849 4850 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4851 return; 4852 4853 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4854 return; 4855 4856 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4857 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4858 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4859 4860 info.link_id = ifmgd->auth_data->link_id; 4861 4862 if (auth_alg != ifmgd->auth_data->algorithm || 4863 (auth_alg != WLAN_AUTH_SAE && 4864 auth_transaction != ifmgd->auth_data->expected_transaction) || 4865 (auth_alg == WLAN_AUTH_SAE && 4866 (auth_transaction < ifmgd->auth_data->expected_transaction || 4867 auth_transaction > 2))) { 4868 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4869 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4870 auth_transaction, 4871 ifmgd->auth_data->expected_transaction); 4872 goto notify_driver; 4873 } 4874 4875 if (status_code != WLAN_STATUS_SUCCESS) { 4876 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4877 4878 if (auth_alg == WLAN_AUTH_SAE && 4879 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4880 (auth_transaction == 1 && 4881 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4882 status_code == WLAN_STATUS_SAE_PK)))) { 4883 /* waiting for userspace now */ 4884 ifmgd->auth_data->waiting = true; 4885 ifmgd->auth_data->timeout = 4886 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4887 ifmgd->auth_data->timeout_started = true; 4888 run_again(sdata, ifmgd->auth_data->timeout); 4889 if (auth_transaction == 1) 4890 sae_need_confirm = true; 4891 goto notify_driver; 4892 } 4893 4894 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4895 mgmt->sa, status_code); 4896 ieee80211_destroy_auth_data(sdata, false); 4897 event.u.mlme.status = MLME_DENIED; 4898 event.u.mlme.reason = status_code; 4899 drv_event_callback(sdata->local, sdata, &event); 4900 goto notify_driver; 4901 } 4902 4903 switch (ifmgd->auth_data->algorithm) { 4904 case WLAN_AUTH_OPEN: 4905 case WLAN_AUTH_LEAP: 4906 case WLAN_AUTH_FT: 4907 case WLAN_AUTH_SAE: 4908 case WLAN_AUTH_FILS_SK: 4909 case WLAN_AUTH_FILS_SK_PFS: 4910 case WLAN_AUTH_FILS_PK: 4911 break; 4912 case WLAN_AUTH_SHARED_KEY: 4913 if (ifmgd->auth_data->expected_transaction != 4) { 4914 ieee80211_auth_challenge(sdata, mgmt, len); 4915 /* need another frame */ 4916 return; 4917 } 4918 break; 4919 default: 4920 WARN_ONCE(1, "invalid auth alg %d", 4921 ifmgd->auth_data->algorithm); 4922 goto notify_driver; 4923 } 4924 4925 event.u.mlme.status = MLME_SUCCESS; 4926 info.success = 1; 4927 drv_event_callback(sdata->local, sdata, &event); 4928 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4929 (auth_transaction == 2 && 4930 ifmgd->auth_data->expected_transaction == 2)) { 4931 if (!ieee80211_mark_sta_auth(sdata)) 4932 return; /* ignore frame -- wait for timeout */ 4933 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4934 auth_transaction == 1) { 4935 sae_need_confirm = true; 4936 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4937 auth_transaction == 2) { 4938 sdata_info(sdata, "SAE peer confirmed\n"); 4939 ifmgd->auth_data->peer_confirmed = true; 4940 } 4941 4942 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4943 notify_driver: 4944 if (!sae_need_confirm) 4945 drv_mgd_complete_tx(sdata->local, sdata, &info); 4946 } 4947 4948 #define case_WLAN(type) \ 4949 case WLAN_REASON_##type: return #type 4950 4951 const char *ieee80211_get_reason_code_string(u16 reason_code) 4952 { 4953 switch (reason_code) { 4954 case_WLAN(UNSPECIFIED); 4955 case_WLAN(PREV_AUTH_NOT_VALID); 4956 case_WLAN(DEAUTH_LEAVING); 4957 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4958 case_WLAN(DISASSOC_AP_BUSY); 4959 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4960 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4961 case_WLAN(DISASSOC_STA_HAS_LEFT); 4962 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4963 case_WLAN(DISASSOC_BAD_POWER); 4964 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4965 case_WLAN(INVALID_IE); 4966 case_WLAN(MIC_FAILURE); 4967 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4968 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4969 case_WLAN(IE_DIFFERENT); 4970 case_WLAN(INVALID_GROUP_CIPHER); 4971 case_WLAN(INVALID_PAIRWISE_CIPHER); 4972 case_WLAN(INVALID_AKMP); 4973 case_WLAN(UNSUPP_RSN_VERSION); 4974 case_WLAN(INVALID_RSN_IE_CAP); 4975 case_WLAN(IEEE8021X_FAILED); 4976 case_WLAN(CIPHER_SUITE_REJECTED); 4977 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4978 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4979 case_WLAN(DISASSOC_LOW_ACK); 4980 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4981 case_WLAN(QSTA_LEAVE_QBSS); 4982 case_WLAN(QSTA_NOT_USE); 4983 case_WLAN(QSTA_REQUIRE_SETUP); 4984 case_WLAN(QSTA_TIMEOUT); 4985 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4986 case_WLAN(MESH_PEER_CANCELED); 4987 case_WLAN(MESH_MAX_PEERS); 4988 case_WLAN(MESH_CONFIG); 4989 case_WLAN(MESH_CLOSE); 4990 case_WLAN(MESH_MAX_RETRIES); 4991 case_WLAN(MESH_CONFIRM_TIMEOUT); 4992 case_WLAN(MESH_INVALID_GTK); 4993 case_WLAN(MESH_INCONSISTENT_PARAM); 4994 case_WLAN(MESH_INVALID_SECURITY); 4995 case_WLAN(MESH_PATH_ERROR); 4996 case_WLAN(MESH_PATH_NOFORWARD); 4997 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4998 case_WLAN(MAC_EXISTS_IN_MBSS); 4999 case_WLAN(MESH_CHAN_REGULATORY); 5000 case_WLAN(MESH_CHAN); 5001 default: return "<unknown>"; 5002 } 5003 } 5004 5005 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 5006 struct ieee80211_mgmt *mgmt, size_t len) 5007 { 5008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5009 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 5010 5011 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5012 5013 if (len < 24 + 2) 5014 return; 5015 5016 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5017 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5018 return; 5019 } 5020 5021 if (ifmgd->associated && 5022 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 5023 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 5024 sdata->vif.cfg.ap_addr, reason_code, 5025 ieee80211_get_reason_code_string(reason_code)); 5026 5027 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5028 5029 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 5030 reason_code, false); 5031 return; 5032 } 5033 5034 if (ifmgd->assoc_data && 5035 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5036 sdata_info(sdata, 5037 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5038 ifmgd->assoc_data->ap_addr, reason_code, 5039 ieee80211_get_reason_code_string(reason_code)); 5040 5041 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5042 5043 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5044 return; 5045 } 5046 } 5047 5048 5049 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5050 struct ieee80211_mgmt *mgmt, size_t len) 5051 { 5052 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5053 u16 reason_code; 5054 5055 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5056 5057 if (len < 24 + 2) 5058 return; 5059 5060 if (!ifmgd->associated || 5061 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5062 return; 5063 5064 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5065 5066 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5067 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5068 return; 5069 } 5070 5071 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5072 sdata->vif.cfg.ap_addr, reason_code, 5073 ieee80211_get_reason_code_string(reason_code)); 5074 5075 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5076 5077 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5078 false); 5079 } 5080 5081 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5082 struct ieee80211_supported_band *sband, 5083 const struct link_sta_info *link_sta, 5084 const struct ieee802_11_elems *elems) 5085 { 5086 const struct ieee80211_sta_he_cap *own_he_cap = 5087 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5088 5089 if (elems->ext_capab_len < 10) 5090 return false; 5091 5092 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5093 return false; 5094 5095 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5096 IEEE80211_HE_MAC_CAP0_TWT_RES && 5097 own_he_cap && 5098 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5099 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5100 } 5101 5102 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5103 struct ieee80211_supported_band *sband, 5104 struct ieee80211_link_data *link, 5105 struct link_sta_info *link_sta, 5106 struct ieee802_11_elems *elems) 5107 { 5108 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5109 5110 if (link->conf->twt_requester != twt) { 5111 link->conf->twt_requester = twt; 5112 return BSS_CHANGED_TWT; 5113 } 5114 return 0; 5115 } 5116 5117 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5118 struct ieee80211_bss_conf *bss_conf, 5119 struct ieee80211_supported_band *sband, 5120 struct link_sta_info *link_sta) 5121 { 5122 const struct ieee80211_sta_he_cap *own_he_cap = 5123 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5124 5125 return bss_conf->he_support && 5126 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5127 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5128 own_he_cap && 5129 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5130 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5131 } 5132 5133 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5134 bool enabled) 5135 { 5136 /* in any case this is called, dialog token should be reset */ 5137 sdata->u.mgd.epcs.dialog_token = 0; 5138 5139 if (sdata->u.mgd.epcs.enabled == enabled) 5140 return; 5141 5142 sdata->u.mgd.epcs.enabled = enabled; 5143 cfg80211_epcs_changed(sdata->dev, enabled); 5144 } 5145 5146 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5147 { 5148 struct ieee80211_local *local = sdata->local; 5149 u8 link_id; 5150 5151 if (!sdata->u.mgd.epcs.enabled) 5152 return; 5153 5154 lockdep_assert_wiphy(local->hw.wiphy); 5155 5156 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5157 struct ieee802_11_elems *elems; 5158 struct ieee80211_link_data *link; 5159 const struct cfg80211_bss_ies *ies; 5160 bool ret; 5161 5162 rcu_read_lock(); 5163 5164 link = sdata_dereference(sdata->link[link_id], sdata); 5165 if (!link || !link->conf || !link->conf->bss) { 5166 rcu_read_unlock(); 5167 continue; 5168 } 5169 5170 if (link->u.mgd.disable_wmm_tracking) { 5171 rcu_read_unlock(); 5172 ieee80211_set_wmm_default(link, false, false); 5173 continue; 5174 } 5175 5176 ies = rcu_dereference(link->conf->bss->beacon_ies); 5177 if (!ies) { 5178 rcu_read_unlock(); 5179 ieee80211_set_wmm_default(link, false, false); 5180 continue; 5181 } 5182 5183 elems = ieee802_11_parse_elems(ies->data, ies->len, 5184 IEEE80211_FTYPE_MGMT | 5185 IEEE80211_STYPE_BEACON, 5186 NULL); 5187 if (!elems) { 5188 rcu_read_unlock(); 5189 ieee80211_set_wmm_default(link, false, false); 5190 continue; 5191 } 5192 5193 ret = _ieee80211_sta_wmm_params(local, link, 5194 elems->wmm_param, 5195 elems->wmm_param_len, 5196 elems->mu_edca_param_set); 5197 5198 kfree(elems); 5199 rcu_read_unlock(); 5200 5201 if (!ret) { 5202 ieee80211_set_wmm_default(link, false, false); 5203 continue; 5204 } 5205 5206 ieee80211_mgd_set_link_qos_params(link); 5207 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5208 } 5209 } 5210 5211 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5212 struct link_sta_info *link_sta, 5213 struct cfg80211_bss *cbss, 5214 struct ieee80211_mgmt *mgmt, 5215 const u8 *elem_start, 5216 unsigned int elem_len, 5217 u64 *changed) 5218 { 5219 struct ieee80211_sub_if_data *sdata = link->sdata; 5220 struct ieee80211_mgd_assoc_data *assoc_data = 5221 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5222 struct ieee80211_bss_conf *bss_conf = link->conf; 5223 struct ieee80211_local *local = sdata->local; 5224 unsigned int link_id = link->link_id; 5225 struct ieee80211_elems_parse_params parse_params = { 5226 .mode = link->u.mgd.conn.mode, 5227 .start = elem_start, 5228 .len = elem_len, 5229 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5230 .from_ap = true, 5231 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 5232 }; 5233 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5234 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5235 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5236 const struct cfg80211_bss_ies *bss_ies = NULL; 5237 struct ieee80211_supported_band *sband; 5238 struct ieee802_11_elems *elems; 5239 const __le16 prof_bss_param_ch_present = 5240 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5241 u16 capab_info; 5242 bool ret; 5243 5244 elems = ieee802_11_parse_elems_full(&parse_params); 5245 if (!elems) 5246 return false; 5247 5248 if (link_id == assoc_data->assoc_link_id) { 5249 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5250 5251 /* 5252 * we should not get to this flow unless the association was 5253 * successful, so set the status directly to success 5254 */ 5255 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5256 if (elems->ml_basic) { 5257 int bss_param_ch_cnt = 5258 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5259 5260 if (bss_param_ch_cnt < 0) { 5261 ret = false; 5262 goto out; 5263 } 5264 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5265 bss_conf->bss_param_ch_cnt_link_id = link_id; 5266 } 5267 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5268 !elems->prof || 5269 !(elems->prof->control & prof_bss_param_ch_present)) { 5270 ret = false; 5271 goto out; 5272 } else { 5273 const u8 *ptr = elems->prof->variable + 5274 elems->prof->sta_info_len - 1; 5275 int bss_param_ch_cnt; 5276 5277 /* 5278 * During parsing, we validated that these fields exist, 5279 * otherwise elems->prof would have been set to NULL. 5280 */ 5281 capab_info = get_unaligned_le16(ptr); 5282 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5283 bss_param_ch_cnt = 5284 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5285 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5286 bss_conf->bss_param_ch_cnt_link_id = link_id; 5287 5288 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5289 link_info(link, "association response status code=%u\n", 5290 assoc_data->link[link_id].status); 5291 ret = true; 5292 goto out; 5293 } 5294 } 5295 5296 if (!is_s1g && !elems->supp_rates) { 5297 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5298 ret = false; 5299 goto out; 5300 } 5301 5302 link->u.mgd.tdls_chan_switch_prohibited = 5303 elems->ext_capab && elems->ext_capab_len >= 5 && 5304 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5305 5306 /* 5307 * Some APs are erroneously not including some information in their 5308 * (re)association response frames. Try to recover by using the data 5309 * from the beacon or probe response. This seems to afflict mobile 5310 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5311 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5312 */ 5313 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5314 ((assoc_data->wmm && !elems->wmm_param) || 5315 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5316 (!elems->ht_cap_elem || !elems->ht_operation)) || 5317 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5318 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5319 const struct cfg80211_bss_ies *ies; 5320 struct ieee802_11_elems *bss_elems; 5321 5322 rcu_read_lock(); 5323 ies = rcu_dereference(cbss->ies); 5324 if (ies) 5325 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5326 GFP_ATOMIC); 5327 rcu_read_unlock(); 5328 if (!bss_ies) { 5329 ret = false; 5330 goto out; 5331 } 5332 5333 parse_params.start = bss_ies->data; 5334 parse_params.len = bss_ies->len; 5335 parse_params.bss = cbss; 5336 parse_params.link_id = -1; 5337 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5338 if (!bss_elems) { 5339 ret = false; 5340 goto out; 5341 } 5342 5343 if (assoc_data->wmm && 5344 !elems->wmm_param && bss_elems->wmm_param) { 5345 elems->wmm_param = bss_elems->wmm_param; 5346 sdata_info(sdata, 5347 "AP bug: WMM param missing from AssocResp\n"); 5348 } 5349 5350 /* 5351 * Also check if we requested HT/VHT, otherwise the AP doesn't 5352 * have to include the IEs in the (re)association response. 5353 */ 5354 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5355 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5356 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5357 sdata_info(sdata, 5358 "AP bug: HT capability missing from AssocResp\n"); 5359 } 5360 if (!elems->ht_operation && bss_elems->ht_operation && 5361 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5362 elems->ht_operation = bss_elems->ht_operation; 5363 sdata_info(sdata, 5364 "AP bug: HT operation missing from AssocResp\n"); 5365 } 5366 5367 if (is_5ghz) { 5368 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5369 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5370 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5371 sdata_info(sdata, 5372 "AP bug: VHT capa missing from AssocResp\n"); 5373 } 5374 5375 if (!elems->vht_operation && bss_elems->vht_operation && 5376 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5377 elems->vht_operation = bss_elems->vht_operation; 5378 sdata_info(sdata, 5379 "AP bug: VHT operation missing from AssocResp\n"); 5380 } 5381 } 5382 kfree(bss_elems); 5383 } 5384 5385 /* 5386 * We previously checked these in the beacon/probe response, so 5387 * they should be present here. This is just a safety net. 5388 * Note that the ieee80211_config_bw() below would also check 5389 * for this (and more), but this has better error reporting. 5390 */ 5391 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5392 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5393 sdata_info(sdata, 5394 "HT AP is missing WMM params or HT capability/operation\n"); 5395 ret = false; 5396 goto out; 5397 } 5398 5399 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5400 (!elems->vht_cap_elem || !elems->vht_operation)) { 5401 sdata_info(sdata, 5402 "VHT AP is missing VHT capability/operation\n"); 5403 ret = false; 5404 goto out; 5405 } 5406 5407 /* check/update if AP changed anything in assoc response vs. scan */ 5408 if (ieee80211_config_bw(link, elems, 5409 link_id == assoc_data->assoc_link_id, 5410 changed, 5411 le16_to_cpu(mgmt->frame_control) & 5412 IEEE80211_FCTL_STYPE)) { 5413 ret = false; 5414 goto out; 5415 } 5416 5417 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5418 ret = false; 5419 goto out; 5420 } 5421 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5422 5423 /* Set up internal HT/VHT capabilities */ 5424 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5425 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5426 elems->ht_cap_elem, 5427 link_sta); 5428 5429 if (elems->vht_cap_elem && 5430 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5431 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5432 const struct cfg80211_bss_ies *ies; 5433 5434 /* 5435 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5436 * too large maximum MPDU length in the association response 5437 * (indicating 12k) that it cannot actually process ... 5438 * Work around that. 5439 */ 5440 rcu_read_lock(); 5441 ies = rcu_dereference(cbss->ies); 5442 if (ies) { 5443 const struct element *elem; 5444 5445 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5446 ies->data, ies->len); 5447 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5448 bss_vht_cap = (const void *)elem->data; 5449 } 5450 5451 if (ieee80211_hw_check(&local->hw, STRICT) && 5452 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5453 sizeof(*bss_vht_cap)))) { 5454 rcu_read_unlock(); 5455 ret = false; 5456 link_info(link, "VHT capabilities mismatch\n"); 5457 goto out; 5458 } 5459 5460 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5461 elems->vht_cap_elem, 5462 bss_vht_cap, link_sta); 5463 rcu_read_unlock(); 5464 } 5465 5466 if (elems->he_operation && 5467 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5468 elems->he_cap) { 5469 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5470 elems->he_cap, 5471 elems->he_cap_len, 5472 elems->he_6ghz_capa, 5473 link_sta); 5474 5475 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5476 if (elems->rsnx && elems->rsnx_len && 5477 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5478 wiphy_ext_feature_isset(local->hw.wiphy, 5479 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5480 bss_conf->twt_protected = true; 5481 else 5482 bss_conf->twt_protected = false; 5483 5484 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5485 link_sta, elems); 5486 5487 if (elems->eht_operation && elems->eht_cap && 5488 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5489 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5490 elems->he_cap, 5491 elems->he_cap_len, 5492 elems->eht_cap, 5493 elems->eht_cap_len, 5494 link_sta); 5495 5496 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5497 bss_conf->epcs_support = bss_conf->eht_support && 5498 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5499 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5500 5501 /* EPCS might be already enabled but a new added link 5502 * does not support EPCS. This should not really happen 5503 * in practice. 5504 */ 5505 if (sdata->u.mgd.epcs.enabled && 5506 !bss_conf->epcs_support) 5507 ieee80211_epcs_teardown(sdata); 5508 } else { 5509 bss_conf->eht_support = false; 5510 bss_conf->epcs_support = false; 5511 } 5512 } else { 5513 bss_conf->he_support = false; 5514 bss_conf->twt_requester = false; 5515 bss_conf->twt_protected = false; 5516 bss_conf->eht_support = false; 5517 bss_conf->epcs_support = false; 5518 } 5519 5520 if (elems->s1g_oper && 5521 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5522 elems->s1g_capab) 5523 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5524 link_sta); 5525 5526 bss_conf->twt_broadcast = 5527 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5528 5529 if (bss_conf->he_support) { 5530 bss_conf->he_bss_color.color = 5531 le32_get_bits(elems->he_operation->he_oper_params, 5532 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5533 bss_conf->he_bss_color.partial = 5534 le32_get_bits(elems->he_operation->he_oper_params, 5535 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5536 bss_conf->he_bss_color.enabled = 5537 !le32_get_bits(elems->he_operation->he_oper_params, 5538 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5539 5540 if (bss_conf->he_bss_color.enabled) 5541 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5542 5543 bss_conf->htc_trig_based_pkt_ext = 5544 le32_get_bits(elems->he_operation->he_oper_params, 5545 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5546 bss_conf->frame_time_rts_th = 5547 le32_get_bits(elems->he_operation->he_oper_params, 5548 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5549 5550 bss_conf->uora_exists = !!elems->uora_element; 5551 if (elems->uora_element) 5552 bss_conf->uora_ocw_range = elems->uora_element[0]; 5553 5554 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5555 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5556 /* TODO: OPEN: what happens if BSS color disable is set? */ 5557 } 5558 5559 if (cbss->transmitted_bss) { 5560 bss_conf->nontransmitted = true; 5561 ether_addr_copy(bss_conf->transmitter_bssid, 5562 cbss->transmitted_bss->bssid); 5563 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5564 bss_conf->bssid_index = cbss->bssid_index; 5565 } 5566 5567 /* 5568 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5569 * in their association response, so ignore that data for our own 5570 * configuration. If it changed since the last beacon, we'll get the 5571 * next beacon and update then. 5572 */ 5573 5574 /* 5575 * If an operating mode notification IE is present, override the 5576 * NSS calculation (that would be done in rate_control_rate_init()) 5577 * and use the # of streams from that element. 5578 */ 5579 if (elems->opmode_notif && 5580 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5581 u8 nss; 5582 5583 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5584 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5585 nss += 1; 5586 link_sta->pub->rx_nss = nss; 5587 } 5588 5589 /* 5590 * Always handle WMM once after association regardless 5591 * of the first value the AP uses. Setting -1 here has 5592 * that effect because the AP values is an unsigned 5593 * 4-bit value. 5594 */ 5595 link->u.mgd.wmm_last_param_set = -1; 5596 link->u.mgd.mu_edca_last_param_set = -1; 5597 5598 if (link->u.mgd.disable_wmm_tracking) { 5599 ieee80211_set_wmm_default(link, false, false); 5600 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5601 elems->wmm_param_len, 5602 elems->mu_edca_param_set)) { 5603 /* still enable QoS since we might have HT/VHT */ 5604 ieee80211_set_wmm_default(link, false, true); 5605 /* disable WMM tracking in this case to disable 5606 * tracking WMM parameter changes in the beacon if 5607 * the parameters weren't actually valid. Doing so 5608 * avoids changing parameters very strangely when 5609 * the AP is going back and forth between valid and 5610 * invalid parameters. 5611 */ 5612 link->u.mgd.disable_wmm_tracking = true; 5613 } 5614 5615 if (elems->max_idle_period_ie) { 5616 bss_conf->max_idle_period = 5617 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5618 bss_conf->protected_keep_alive = 5619 !!(elems->max_idle_period_ie->idle_options & 5620 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5621 *changed |= BSS_CHANGED_KEEP_ALIVE; 5622 } else { 5623 bss_conf->max_idle_period = 0; 5624 bss_conf->protected_keep_alive = false; 5625 } 5626 5627 /* set assoc capability (AID was already set earlier), 5628 * ieee80211_set_associated() will tell the driver */ 5629 bss_conf->assoc_capability = capab_info; 5630 5631 ret = true; 5632 out: 5633 kfree(elems); 5634 kfree(bss_ies); 5635 return ret; 5636 } 5637 5638 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5639 struct sta_info *sta, 5640 struct link_sta_info *link_sta, 5641 struct cfg80211_bss *cbss) 5642 { 5643 struct ieee80211_sub_if_data *sdata = link->sdata; 5644 struct ieee80211_local *local = sdata->local; 5645 struct ieee80211_bss *bss = (void *)cbss->priv; 5646 u32 rates = 0, basic_rates = 0; 5647 bool have_higher_than_11mbit = false; 5648 int min_rate = INT_MAX, min_rate_index = -1; 5649 struct ieee80211_supported_band *sband; 5650 5651 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5652 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5653 5654 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5655 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5656 ieee80211_s1g_sta_rate_init(sta); 5657 return 0; 5658 } 5659 5660 sband = local->hw.wiphy->bands[cbss->channel->band]; 5661 5662 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5663 NULL, 0, 5664 &rates, &basic_rates, NULL, 5665 &have_higher_than_11mbit, 5666 &min_rate, &min_rate_index); 5667 5668 /* 5669 * This used to be a workaround for basic rates missing 5670 * in the association response frame. Now that we no 5671 * longer use the basic rates from there, it probably 5672 * doesn't happen any more, but keep the workaround so 5673 * in case some *other* APs are buggy in different ways 5674 * we can connect -- with a warning. 5675 * Allow this workaround only in case the AP provided at least 5676 * one rate. 5677 */ 5678 if (min_rate_index < 0) { 5679 link_info(link, "No legacy rates in association response\n"); 5680 return -EINVAL; 5681 } else if (!basic_rates) { 5682 link_info(link, "No basic rates, using min rate instead\n"); 5683 basic_rates = BIT(min_rate_index); 5684 } 5685 5686 if (rates) 5687 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5688 else 5689 link_info(link, "No rates found, keeping mandatory only\n"); 5690 5691 link->conf->basic_rates = basic_rates; 5692 5693 /* cf. IEEE 802.11 9.2.12 */ 5694 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5695 have_higher_than_11mbit; 5696 5697 return 0; 5698 } 5699 5700 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5701 struct cfg80211_bss *cbss) 5702 { 5703 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5704 const struct element *ht_cap_elem, *vht_cap_elem; 5705 const struct cfg80211_bss_ies *ies; 5706 const struct ieee80211_ht_cap *ht_cap; 5707 const struct ieee80211_vht_cap *vht_cap; 5708 const struct ieee80211_he_cap_elem *he_cap; 5709 const struct element *he_cap_elem; 5710 u16 mcs_80_map, mcs_160_map; 5711 int i, mcs_nss_size; 5712 bool support_160; 5713 u8 chains = 1; 5714 5715 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5716 return chains; 5717 5718 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5719 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5720 ht_cap = (void *)ht_cap_elem->data; 5721 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5722 /* 5723 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5724 * "Tx Unequal Modulation Supported" fields. 5725 */ 5726 } 5727 5728 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5729 return chains; 5730 5731 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5732 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5733 u8 nss; 5734 u16 tx_mcs_map; 5735 5736 vht_cap = (void *)vht_cap_elem->data; 5737 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5738 for (nss = 8; nss > 0; nss--) { 5739 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5740 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5741 break; 5742 } 5743 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5744 chains = max(chains, nss); 5745 } 5746 5747 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5748 return chains; 5749 5750 ies = rcu_dereference(cbss->ies); 5751 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5752 ies->data, ies->len); 5753 5754 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap) + 1) 5755 return chains; 5756 5757 /* skip one byte ext_tag_id */ 5758 he_cap = (void *)(he_cap_elem->data + 1); 5759 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5760 5761 /* invalid HE IE */ 5762 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5763 return chains; 5764 5765 /* mcs_nss is right after he_cap info */ 5766 he_mcs_nss_supp = (void *)(he_cap + 1); 5767 5768 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5769 5770 for (i = 7; i >= 0; i--) { 5771 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5772 5773 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5774 chains = max_t(u8, chains, i + 1); 5775 break; 5776 } 5777 } 5778 5779 support_160 = he_cap->phy_cap_info[0] & 5780 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5781 5782 if (!support_160) 5783 return chains; 5784 5785 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5786 for (i = 7; i >= 0; i--) { 5787 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5788 5789 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5790 chains = max_t(u8, chains, i + 1); 5791 break; 5792 } 5793 } 5794 5795 return chains; 5796 } 5797 5798 static void 5799 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5800 struct ieee80211_supported_band *sband, 5801 struct cfg80211_assoc_request *req, 5802 bool wmm_used, int link_id, 5803 struct ieee80211_conn_settings *conn) 5804 { 5805 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5806 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5807 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5808 const struct ieee80211_sta_he_cap *he_cap; 5809 const struct ieee80211_sta_eht_cap *eht_cap; 5810 struct ieee80211_sta_vht_cap vht_cap; 5811 5812 if (sband->band == NL80211_BAND_S1GHZ) { 5813 conn->mode = IEEE80211_CONN_MODE_S1G; 5814 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5815 mlme_dbg(sdata, "operating as S1G STA\n"); 5816 return; 5817 } 5818 5819 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5820 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5821 5822 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5823 5824 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5825 mlme_link_id_dbg(sdata, link_id, 5826 "HT disabled by flag, limiting to legacy\n"); 5827 goto out; 5828 } 5829 5830 if (!wmm_used) { 5831 mlme_link_id_dbg(sdata, link_id, 5832 "WMM/QoS not supported, limiting to legacy\n"); 5833 goto out; 5834 } 5835 5836 if (req) { 5837 unsigned int i; 5838 5839 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5840 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5841 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5842 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5843 netdev_info(sdata->dev, 5844 "WEP/TKIP use, limiting to legacy\n"); 5845 goto out; 5846 } 5847 } 5848 } 5849 5850 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5851 mlme_link_id_dbg(sdata, link_id, 5852 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5853 goto out; 5854 } 5855 5856 /* HT is fine */ 5857 conn->mode = IEEE80211_CONN_MODE_HT; 5858 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5859 IEEE80211_CONN_BW_LIMIT_40 : 5860 IEEE80211_CONN_BW_LIMIT_20; 5861 5862 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5863 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5864 5865 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5866 mlme_link_id_dbg(sdata, link_id, 5867 "VHT disabled by flag, limiting to HT\n"); 5868 goto out; 5869 } 5870 5871 if (vht_cap.vht_supported && is_5ghz) { 5872 bool have_80mhz = false; 5873 unsigned int i; 5874 5875 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5876 mlme_link_id_dbg(sdata, link_id, 5877 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5878 goto out; 5879 } 5880 5881 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5882 for (i = 0; i < sband->n_channels; i++) { 5883 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5884 IEEE80211_CHAN_NO_80MHZ)) 5885 continue; 5886 5887 have_80mhz = true; 5888 break; 5889 } 5890 5891 if (!have_80mhz) { 5892 mlme_link_id_dbg(sdata, link_id, 5893 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5894 goto out; 5895 } 5896 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5897 mlme_link_id_dbg(sdata, link_id, 5898 "no VHT support on 5 GHz, limiting to HT\n"); 5899 goto out; 5900 } 5901 5902 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5903 if (sband->band != NL80211_BAND_2GHZ) { 5904 conn->mode = IEEE80211_CONN_MODE_VHT; 5905 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5906 } 5907 5908 if (is_5ghz && 5909 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5910 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5911 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5912 mlme_link_id_dbg(sdata, link_id, 5913 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5914 } 5915 5916 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5917 mlme_link_id_dbg(sdata, link_id, 5918 "HE disabled by flag, limiting to HT/VHT\n"); 5919 goto out; 5920 } 5921 5922 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5923 if (!he_cap) { 5924 WARN_ON(is_6ghz); 5925 mlme_link_id_dbg(sdata, link_id, 5926 "no HE support, limiting to HT/VHT\n"); 5927 goto out; 5928 } 5929 5930 /* so we have HE */ 5931 conn->mode = IEEE80211_CONN_MODE_HE; 5932 5933 /* check bandwidth */ 5934 switch (sband->band) { 5935 default: 5936 case NL80211_BAND_2GHZ: 5937 if (he_cap->he_cap_elem.phy_cap_info[0] & 5938 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5939 break; 5940 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5941 mlme_link_id_dbg(sdata, link_id, 5942 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5943 break; 5944 case NL80211_BAND_5GHZ: 5945 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5946 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5947 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5948 mlme_link_id_dbg(sdata, link_id, 5949 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5950 break; 5951 } 5952 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5953 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5954 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5955 conn->bw_limit, 5956 IEEE80211_CONN_BW_LIMIT_80); 5957 mlme_link_id_dbg(sdata, link_id, 5958 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5959 } 5960 break; 5961 case NL80211_BAND_6GHZ: 5962 if (he_cap->he_cap_elem.phy_cap_info[0] & 5963 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5964 break; 5965 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5966 conn->bw_limit, 5967 IEEE80211_CONN_BW_LIMIT_80); 5968 mlme_link_id_dbg(sdata, link_id, 5969 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5970 break; 5971 } 5972 5973 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5974 mlme_link_id_dbg(sdata, link_id, 5975 "EHT disabled by flag, limiting to HE\n"); 5976 goto out; 5977 } 5978 5979 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5980 if (!eht_cap) { 5981 mlme_link_id_dbg(sdata, link_id, 5982 "no EHT support, limiting to HE\n"); 5983 goto out; 5984 } 5985 5986 /* we have EHT */ 5987 5988 conn->mode = IEEE80211_CONN_MODE_EHT; 5989 5990 /* check bandwidth */ 5991 if (is_6ghz && 5992 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5993 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5994 else if (is_6ghz) 5995 mlme_link_id_dbg(sdata, link_id, 5996 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5997 5998 out: 5999 mlme_link_id_dbg(sdata, link_id, 6000 "determined local STA to be %s, BW limited to %d MHz\n", 6001 ieee80211_conn_mode_str(conn->mode), 6002 20 * (1 << conn->bw_limit)); 6003 } 6004 6005 static void 6006 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 6007 struct ieee80211_supported_band *sband, 6008 struct cfg80211_auth_request *req, 6009 bool wmm_used, 6010 struct ieee80211_conn_settings *conn) 6011 { 6012 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 6013 req->link_id > 0 ? req->link_id : 0, 6014 conn); 6015 } 6016 6017 static void 6018 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 6019 struct ieee80211_supported_band *sband, 6020 struct cfg80211_assoc_request *req, 6021 bool wmm_used, int link_id, 6022 struct ieee80211_conn_settings *conn) 6023 { 6024 struct ieee80211_conn_settings tmp; 6025 6026 WARN_ON(!req); 6027 6028 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 6029 &tmp); 6030 6031 conn->mode = min_t(enum ieee80211_conn_mode, 6032 conn->mode, tmp.mode); 6033 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 6034 conn->bw_limit, tmp.bw_limit); 6035 } 6036 6037 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6038 struct ieee80211_link_data *link, 6039 int link_id, 6040 struct cfg80211_bss *cbss, bool mlo, 6041 struct ieee80211_conn_settings *conn, 6042 unsigned long *userspace_selectors) 6043 { 6044 struct ieee80211_local *local = sdata->local; 6045 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6046 struct ieee80211_chan_req chanreq = {}; 6047 struct cfg80211_chan_def ap_chandef; 6048 struct ieee802_11_elems *elems; 6049 int ret; 6050 6051 lockdep_assert_wiphy(local->hw.wiphy); 6052 6053 rcu_read_lock(); 6054 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6055 &chanreq, &ap_chandef, 6056 userspace_selectors); 6057 6058 if (IS_ERR(elems)) { 6059 rcu_read_unlock(); 6060 return PTR_ERR(elems); 6061 } 6062 6063 if (mlo && !elems->ml_basic) { 6064 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6065 rcu_read_unlock(); 6066 kfree(elems); 6067 return -EINVAL; 6068 } 6069 6070 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6071 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6072 6073 if (elems->pwr_constr_elem) 6074 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6075 6076 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6077 if (he_6ghz_oper) 6078 link->conf->power_type = 6079 cfg80211_6ghz_power_type(he_6ghz_oper->control, 6080 cbss->channel->flags); 6081 else 6082 link_info(link, 6083 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6084 cbss->channel->center_freq); 6085 6086 link->conf->tpe = elems->tpe; 6087 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6088 &chanreq.oper); 6089 } 6090 rcu_read_unlock(); 6091 /* the element data was RCU protected so no longer valid anyway */ 6092 kfree(elems); 6093 elems = NULL; 6094 6095 if (!link) 6096 return 0; 6097 6098 rcu_read_lock(); 6099 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6100 local->rx_chains); 6101 rcu_read_unlock(); 6102 6103 /* 6104 * If this fails (possibly due to channel context sharing 6105 * on incompatible channels, e.g. 80+80 and 160 sharing the 6106 * same control channel) try to use a smaller bandwidth. 6107 */ 6108 ret = ieee80211_link_use_channel(link, &chanreq, 6109 IEEE80211_CHANCTX_SHARED); 6110 6111 /* don't downgrade for 5 and 10 MHz channels, though. */ 6112 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6113 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6114 return ret; 6115 6116 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6117 ieee80211_chanreq_downgrade(&chanreq, conn); 6118 6119 ret = ieee80211_link_use_channel(link, &chanreq, 6120 IEEE80211_CHANCTX_SHARED); 6121 } 6122 6123 return ret; 6124 } 6125 6126 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6127 u8 *dtim_count, u8 *dtim_period) 6128 { 6129 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6130 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6131 ies->len); 6132 const struct ieee80211_tim_ie *tim = NULL; 6133 const struct ieee80211_bssid_index *idx; 6134 bool valid = tim_ie && tim_ie[1] >= 2; 6135 6136 if (valid) 6137 tim = (void *)(tim_ie + 2); 6138 6139 if (dtim_count) 6140 *dtim_count = valid ? tim->dtim_count : 0; 6141 6142 if (dtim_period) 6143 *dtim_period = valid ? tim->dtim_period : 0; 6144 6145 /* Check if value is overridden by non-transmitted profile */ 6146 if (!idx_ie || idx_ie[1] < 3) 6147 return valid; 6148 6149 idx = (void *)(idx_ie + 2); 6150 6151 if (dtim_count) 6152 *dtim_count = idx->dtim_count; 6153 6154 if (dtim_period) 6155 *dtim_period = idx->dtim_period; 6156 6157 return true; 6158 } 6159 6160 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6161 struct ieee80211_mgmt *mgmt, 6162 struct ieee802_11_elems *elems, 6163 const u8 *elem_start, unsigned int elem_len) 6164 { 6165 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6166 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6167 struct ieee80211_local *local = sdata->local; 6168 unsigned int link_id; 6169 struct sta_info *sta; 6170 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6171 u16 valid_links = 0, dormant_links = 0; 6172 int err; 6173 6174 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6175 /* 6176 * station info was already allocated and inserted before 6177 * the association and should be available to us 6178 */ 6179 sta = sta_info_get(sdata, assoc_data->ap_addr); 6180 if (WARN_ON(!sta)) 6181 goto out_err; 6182 6183 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6184 6185 if (ieee80211_vif_is_mld(&sdata->vif)) { 6186 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6187 if (!assoc_data->link[link_id].bss) 6188 continue; 6189 6190 valid_links |= BIT(link_id); 6191 if (assoc_data->link[link_id].disabled) 6192 dormant_links |= BIT(link_id); 6193 6194 if (link_id != assoc_data->assoc_link_id) { 6195 err = ieee80211_sta_allocate_link(sta, link_id); 6196 if (err) 6197 goto out_err; 6198 } 6199 } 6200 6201 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6202 } 6203 6204 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6205 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6206 struct ieee80211_link_data *link; 6207 struct link_sta_info *link_sta; 6208 6209 if (!cbss) 6210 continue; 6211 6212 link = sdata_dereference(sdata->link[link_id], sdata); 6213 if (WARN_ON(!link)) 6214 goto out_err; 6215 6216 if (ieee80211_vif_is_mld(&sdata->vif)) 6217 link_info(link, 6218 "local address %pM, AP link address %pM%s\n", 6219 link->conf->addr, 6220 assoc_data->link[link_id].bss->bssid, 6221 link_id == assoc_data->assoc_link_id ? 6222 " (assoc)" : ""); 6223 6224 link_sta = rcu_dereference_protected(sta->link[link_id], 6225 lockdep_is_held(&local->hw.wiphy->mtx)); 6226 if (WARN_ON(!link_sta)) 6227 goto out_err; 6228 6229 if (!link->u.mgd.have_beacon) { 6230 const struct cfg80211_bss_ies *ies; 6231 6232 rcu_read_lock(); 6233 ies = rcu_dereference(cbss->beacon_ies); 6234 if (ies) 6235 link->u.mgd.have_beacon = true; 6236 else 6237 ies = rcu_dereference(cbss->ies); 6238 ieee80211_get_dtim(ies, 6239 &link->conf->sync_dtim_count, 6240 &link->u.mgd.dtim_period); 6241 link->conf->beacon_int = cbss->beacon_interval; 6242 rcu_read_unlock(); 6243 } 6244 6245 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6246 6247 if (link_id != assoc_data->assoc_link_id) { 6248 link->u.mgd.conn = assoc_data->link[link_id].conn; 6249 6250 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6251 true, &link->u.mgd.conn, 6252 sdata->u.mgd.userspace_selectors); 6253 if (err) { 6254 link_info(link, "prep_channel failed\n"); 6255 goto out_err; 6256 } 6257 } 6258 6259 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6260 assoc_data->link[link_id].bss); 6261 if (err) 6262 goto out_err; 6263 6264 if (!ieee80211_assoc_config_link(link, link_sta, 6265 assoc_data->link[link_id].bss, 6266 mgmt, elem_start, elem_len, 6267 &changed[link_id])) 6268 goto out_err; 6269 6270 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6271 valid_links &= ~BIT(link_id); 6272 ieee80211_sta_remove_link(sta, link_id); 6273 continue; 6274 } 6275 6276 if (link_id != assoc_data->assoc_link_id) { 6277 err = ieee80211_sta_activate_link(sta, link_id); 6278 if (err) 6279 goto out_err; 6280 } 6281 } 6282 6283 /* links might have changed due to rejected ones, set them again */ 6284 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6285 6286 rate_control_rate_init_all_links(sta); 6287 6288 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6289 set_sta_flag(sta, WLAN_STA_MFP); 6290 sta->sta.mfp = true; 6291 } else { 6292 sta->sta.mfp = false; 6293 } 6294 6295 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6296 elems->ext_capab_len); 6297 6298 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6299 local->hw.queues >= IEEE80211_NUM_ACS; 6300 6301 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6302 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6303 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6304 if (err) { 6305 sdata_info(sdata, 6306 "failed to move station %pM to desired state\n", 6307 sta->sta.addr); 6308 WARN_ON(__sta_info_destroy(sta)); 6309 goto out_err; 6310 } 6311 6312 if (sdata->wdev.use_4addr) 6313 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6314 6315 ieee80211_set_associated(sdata, assoc_data, changed); 6316 6317 /* 6318 * If we're using 4-addr mode, let the AP know that we're 6319 * doing so, so that it can create the STA VLAN on its side 6320 */ 6321 if (ifmgd->use_4addr) 6322 ieee80211_send_4addr_nullfunc(local, sdata); 6323 6324 /* 6325 * Start timer to probe the connection to the AP now. 6326 * Also start the timer that will detect beacon loss. 6327 */ 6328 ieee80211_sta_reset_beacon_monitor(sdata); 6329 ieee80211_sta_reset_conn_monitor(sdata); 6330 6331 return true; 6332 out_err: 6333 eth_zero_addr(sdata->vif.cfg.ap_addr); 6334 return false; 6335 } 6336 6337 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6338 struct ieee80211_mgmt *mgmt, 6339 size_t len) 6340 { 6341 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6342 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6343 u16 capab_info, status_code, aid; 6344 struct ieee80211_elems_parse_params parse_params = { 6345 .bss = NULL, 6346 .link_id = -1, 6347 .from_ap = true, 6348 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 6349 }; 6350 struct ieee802_11_elems *elems; 6351 int ac; 6352 const u8 *elem_start; 6353 unsigned int elem_len; 6354 bool reassoc; 6355 struct ieee80211_event event = { 6356 .type = MLME_EVENT, 6357 .u.mlme.data = ASSOC_EVENT, 6358 }; 6359 struct ieee80211_prep_tx_info info = {}; 6360 struct cfg80211_rx_assoc_resp_data resp = { 6361 .uapsd_queues = -1, 6362 }; 6363 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6364 unsigned int link_id; 6365 u16 max_aid = IEEE80211_MAX_AID; 6366 6367 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6368 6369 if (!assoc_data) 6370 return; 6371 6372 info.link_id = assoc_data->assoc_link_id; 6373 6374 parse_params.mode = 6375 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6376 6377 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6378 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6379 return; 6380 6381 /* 6382 * AssocResp and ReassocResp have identical structure, so process both 6383 * of them in this function. 6384 */ 6385 6386 if (len < 24 + 6) 6387 return; 6388 6389 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6390 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6391 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6392 if (assoc_data->s1g) { 6393 elem_start = mgmt->u.s1g_assoc_resp.variable; 6394 max_aid = IEEE80211_MAX_SUPPORTED_S1G_AID; 6395 } else { 6396 elem_start = mgmt->u.assoc_resp.variable; 6397 } 6398 6399 /* 6400 * Note: this may not be perfect, AP might misbehave - if 6401 * anyone needs to rely on perfect complete notification 6402 * with the exact right subtype, then we need to track what 6403 * we actually transmitted. 6404 */ 6405 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6406 IEEE80211_STYPE_ASSOC_REQ; 6407 6408 if (assoc_data->fils_kek_len && 6409 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6410 return; 6411 6412 elem_len = len - (elem_start - (u8 *)mgmt); 6413 parse_params.start = elem_start; 6414 parse_params.len = elem_len; 6415 elems = ieee802_11_parse_elems_full(&parse_params); 6416 if (!elems) 6417 goto notify_driver; 6418 6419 if (elems->aid_resp) 6420 aid = le16_to_cpu(elems->aid_resp->aid); 6421 else 6422 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6423 6424 /* 6425 * The 5 MSB of the AID field are reserved for a non-S1G STA. For 6426 * an S1G STA the 3 MSBs are reserved. 6427 * (802.11-2016 9.4.1.8 AID field). 6428 */ 6429 aid &= assoc_data->s1g ? 0x1fff : 0x7ff; 6430 6431 sdata_info(sdata, 6432 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6433 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6434 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6435 6436 ifmgd->broken_ap = false; 6437 6438 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6439 elems->timeout_int && 6440 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6441 u32 tu, ms; 6442 6443 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6444 le32_to_cpu(elems->timeout_int->value)); 6445 6446 tu = le32_to_cpu(elems->timeout_int->value); 6447 ms = tu * 1024 / 1000; 6448 sdata_info(sdata, 6449 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6450 assoc_data->ap_addr, tu, ms); 6451 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6452 assoc_data->timeout_started = true; 6453 assoc_data->comeback = true; 6454 if (ms > IEEE80211_ASSOC_TIMEOUT) 6455 run_again(sdata, assoc_data->timeout); 6456 goto notify_driver; 6457 } 6458 6459 if (status_code != WLAN_STATUS_SUCCESS) { 6460 sdata_info(sdata, "%pM denied association (code=%d)\n", 6461 assoc_data->ap_addr, status_code); 6462 event.u.mlme.status = MLME_DENIED; 6463 event.u.mlme.reason = status_code; 6464 drv_event_callback(sdata->local, sdata, &event); 6465 } else { 6466 if (aid == 0 || aid > max_aid) { 6467 sdata_info(sdata, 6468 "invalid AID value %d (out of range), turn off PS\n", 6469 aid); 6470 aid = 0; 6471 ifmgd->broken_ap = true; 6472 } 6473 6474 if (ieee80211_vif_is_mld(&sdata->vif)) { 6475 struct ieee80211_mle_basic_common_info *common; 6476 6477 if (!elems->ml_basic) { 6478 sdata_info(sdata, 6479 "MLO association with %pM but no (basic) multi-link element in response!\n", 6480 assoc_data->ap_addr); 6481 goto abandon_assoc; 6482 } 6483 6484 common = (void *)elems->ml_basic->variable; 6485 6486 if (memcmp(assoc_data->ap_addr, 6487 common->mld_mac_addr, ETH_ALEN)) { 6488 sdata_info(sdata, 6489 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6490 common->mld_mac_addr, 6491 assoc_data->ap_addr); 6492 goto abandon_assoc; 6493 } 6494 6495 sdata->vif.cfg.eml_cap = 6496 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6497 sdata->vif.cfg.eml_med_sync_delay = 6498 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6499 sdata->vif.cfg.mld_capa_op = 6500 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6501 } 6502 6503 sdata->vif.cfg.aid = aid; 6504 sdata->vif.cfg.s1g = assoc_data->s1g; 6505 6506 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6507 elem_start, elem_len)) { 6508 /* oops -- internal error -- send timeout for now */ 6509 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6510 goto notify_driver; 6511 } 6512 event.u.mlme.status = MLME_SUCCESS; 6513 drv_event_callback(sdata->local, sdata, &event); 6514 sdata_info(sdata, "associated\n"); 6515 6516 info.success = 1; 6517 } 6518 6519 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6520 struct ieee80211_link_data *link; 6521 6522 if (!assoc_data->link[link_id].bss) 6523 continue; 6524 6525 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6526 ether_addr_copy(resp.links[link_id].addr, 6527 assoc_data->link[link_id].addr); 6528 resp.links[link_id].status = assoc_data->link[link_id].status; 6529 6530 link = sdata_dereference(sdata->link[link_id], sdata); 6531 if (!link) 6532 continue; 6533 6534 /* get uapsd queues configuration - same for all links */ 6535 resp.uapsd_queues = 0; 6536 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6537 if (link->tx_conf[ac].uapsd) 6538 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6539 } 6540 6541 if (ieee80211_vif_is_mld(&sdata->vif)) { 6542 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6543 resp.ap_mld_addr = ap_mld_addr; 6544 } 6545 6546 ieee80211_destroy_assoc_data(sdata, 6547 status_code == WLAN_STATUS_SUCCESS ? 6548 ASSOC_SUCCESS : 6549 ASSOC_REJECTED); 6550 6551 resp.buf = (u8 *)mgmt; 6552 resp.len = len; 6553 resp.req_ies = ifmgd->assoc_req_ies; 6554 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6555 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6556 notify_driver: 6557 drv_mgd_complete_tx(sdata->local, sdata, &info); 6558 kfree(elems); 6559 return; 6560 abandon_assoc: 6561 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6562 goto notify_driver; 6563 } 6564 6565 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6566 struct ieee80211_mgmt *mgmt, size_t len, 6567 struct ieee80211_rx_status *rx_status) 6568 { 6569 struct ieee80211_sub_if_data *sdata = link->sdata; 6570 struct ieee80211_local *local = sdata->local; 6571 struct ieee80211_bss *bss; 6572 struct ieee80211_channel *channel; 6573 6574 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6575 6576 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6577 ieee80211_rx_status_to_khz(rx_status)); 6578 if (!channel) 6579 return; 6580 6581 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6582 if (bss) { 6583 link->conf->beacon_rate = bss->beacon_rate; 6584 ieee80211_rx_bss_put(local, bss); 6585 } 6586 } 6587 6588 6589 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6590 struct sk_buff *skb) 6591 { 6592 struct ieee80211_sub_if_data *sdata = link->sdata; 6593 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6594 struct ieee80211_if_managed *ifmgd; 6595 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6596 struct ieee80211_channel *channel; 6597 size_t baselen, len = skb->len; 6598 6599 ifmgd = &sdata->u.mgd; 6600 6601 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6602 6603 /* 6604 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6605 * "If a 6 GHz AP receives a Probe Request frame and responds with 6606 * a Probe Response frame [..], the Address 1 field of the Probe 6607 * Response frame shall be set to the broadcast address [..]" 6608 * So, on 6GHz band we should also accept broadcast responses. 6609 */ 6610 channel = ieee80211_get_channel_khz(sdata->local->hw.wiphy, 6611 ieee80211_rx_status_to_khz(rx_status)); 6612 if (!channel) 6613 return; 6614 6615 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6616 (channel->band != NL80211_BAND_6GHZ || 6617 !is_broadcast_ether_addr(mgmt->da))) 6618 return; /* ignore ProbeResp to foreign address */ 6619 6620 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6621 if (baselen > len) 6622 return; 6623 6624 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6625 6626 if (ifmgd->associated && 6627 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6628 ieee80211_reset_ap_probe(sdata); 6629 } 6630 6631 /* 6632 * This is the canonical list of information elements we care about, 6633 * the filter code also gives us all changes to the Microsoft OUI 6634 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6635 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6636 * changes to requested client power. 6637 * 6638 * We implement beacon filtering in software since that means we can 6639 * avoid processing the frame here and in cfg80211, and userspace 6640 * will not be able to tell whether the hardware supports it or not. 6641 * 6642 * XXX: This list needs to be dynamic -- userspace needs to be able to 6643 * add items it requires. It also needs to be able to tell us to 6644 * look out for other vendor IEs. 6645 */ 6646 static const u64 care_about_ies = 6647 (1ULL << WLAN_EID_COUNTRY) | 6648 (1ULL << WLAN_EID_ERP_INFO) | 6649 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6650 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6651 (1ULL << WLAN_EID_HT_CAPABILITY) | 6652 (1ULL << WLAN_EID_HT_OPERATION) | 6653 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6654 6655 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6656 struct ieee80211_if_managed *ifmgd, 6657 struct ieee80211_bss_conf *bss_conf, 6658 struct ieee80211_local *local, 6659 struct ieee80211_rx_status *rx_status) 6660 { 6661 struct ieee80211_sub_if_data *sdata = link->sdata; 6662 6663 /* Track average RSSI from the Beacon frames of the current AP */ 6664 6665 if (!link->u.mgd.tracking_signal_avg) { 6666 link->u.mgd.tracking_signal_avg = true; 6667 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6668 link->u.mgd.last_cqm_event_signal = 0; 6669 link->u.mgd.count_beacon_signal = 1; 6670 link->u.mgd.last_ave_beacon_signal = 0; 6671 } else { 6672 link->u.mgd.count_beacon_signal++; 6673 } 6674 6675 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6676 -rx_status->signal); 6677 6678 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6679 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6680 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6681 int last_sig = link->u.mgd.last_ave_beacon_signal; 6682 struct ieee80211_event event = { 6683 .type = RSSI_EVENT, 6684 }; 6685 6686 /* 6687 * if signal crosses either of the boundaries, invoke callback 6688 * with appropriate parameters 6689 */ 6690 if (sig > ifmgd->rssi_max_thold && 6691 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6692 link->u.mgd.last_ave_beacon_signal = sig; 6693 event.u.rssi.data = RSSI_EVENT_HIGH; 6694 drv_event_callback(local, sdata, &event); 6695 } else if (sig < ifmgd->rssi_min_thold && 6696 (last_sig >= ifmgd->rssi_max_thold || 6697 last_sig == 0)) { 6698 link->u.mgd.last_ave_beacon_signal = sig; 6699 event.u.rssi.data = RSSI_EVENT_LOW; 6700 drv_event_callback(local, sdata, &event); 6701 } 6702 } 6703 6704 if (bss_conf->cqm_rssi_thold && 6705 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6706 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6707 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6708 int last_event = link->u.mgd.last_cqm_event_signal; 6709 int thold = bss_conf->cqm_rssi_thold; 6710 int hyst = bss_conf->cqm_rssi_hyst; 6711 6712 if (sig < thold && 6713 (last_event == 0 || sig < last_event - hyst)) { 6714 link->u.mgd.last_cqm_event_signal = sig; 6715 ieee80211_cqm_rssi_notify( 6716 &sdata->vif, 6717 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6718 sig, GFP_KERNEL); 6719 } else if (sig > thold && 6720 (last_event == 0 || sig > last_event + hyst)) { 6721 link->u.mgd.last_cqm_event_signal = sig; 6722 ieee80211_cqm_rssi_notify( 6723 &sdata->vif, 6724 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6725 sig, GFP_KERNEL); 6726 } 6727 } 6728 6729 if (bss_conf->cqm_rssi_low && 6730 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6731 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6732 int last_event = link->u.mgd.last_cqm_event_signal; 6733 int low = bss_conf->cqm_rssi_low; 6734 int high = bss_conf->cqm_rssi_high; 6735 6736 if (sig < low && 6737 (last_event == 0 || last_event >= low)) { 6738 link->u.mgd.last_cqm_event_signal = sig; 6739 ieee80211_cqm_rssi_notify( 6740 &sdata->vif, 6741 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6742 sig, GFP_KERNEL); 6743 } else if (sig > high && 6744 (last_event == 0 || last_event <= high)) { 6745 link->u.mgd.last_cqm_event_signal = sig; 6746 ieee80211_cqm_rssi_notify( 6747 &sdata->vif, 6748 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6749 sig, GFP_KERNEL); 6750 } 6751 } 6752 } 6753 6754 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6755 struct cfg80211_bss *bss) 6756 { 6757 if (ether_addr_equal(tx_bssid, bss->bssid)) 6758 return true; 6759 if (!bss->transmitted_bss) 6760 return false; 6761 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6762 } 6763 6764 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6765 struct wiphy_work *work) 6766 { 6767 struct ieee80211_sub_if_data *sdata = 6768 container_of(work, struct ieee80211_sub_if_data, 6769 u.mgd.ml_reconf_work.work); 6770 u16 new_valid_links, new_active_links, new_dormant_links; 6771 int ret; 6772 6773 if (!sdata->u.mgd.removed_links) 6774 return; 6775 6776 sdata_info(sdata, 6777 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6778 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6779 6780 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6781 if (new_valid_links == sdata->vif.valid_links) 6782 return; 6783 6784 if (!new_valid_links || 6785 !(new_valid_links & ~sdata->vif.dormant_links)) { 6786 sdata_info(sdata, "No valid links after reconfiguration\n"); 6787 ret = -EINVAL; 6788 goto out; 6789 } 6790 6791 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6792 if (new_active_links != sdata->vif.active_links) { 6793 if (!new_active_links) 6794 new_active_links = 6795 BIT(ffs(new_valid_links & 6796 ~sdata->vif.dormant_links) - 1); 6797 6798 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6799 if (ret) { 6800 sdata_info(sdata, 6801 "Failed setting active links\n"); 6802 goto out; 6803 } 6804 } 6805 6806 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6807 6808 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6809 new_dormant_links); 6810 if (ret) 6811 sdata_info(sdata, "Failed setting valid links\n"); 6812 6813 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6814 6815 out: 6816 if (!ret) 6817 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6818 else 6819 __ieee80211_disconnect(sdata); 6820 6821 sdata->u.mgd.removed_links = 0; 6822 } 6823 6824 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6825 struct ieee802_11_elems *elems) 6826 { 6827 const struct element *sub; 6828 unsigned long removed_links = 0; 6829 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6830 u8 link_id; 6831 u32 delay; 6832 6833 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6834 return; 6835 6836 /* Directly parse the sub elements as the common information doesn't 6837 * hold any useful information. 6838 */ 6839 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6840 elems->ml_reconf_len) { 6841 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6842 u8 *pos = prof->variable; 6843 u16 control; 6844 6845 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6846 continue; 6847 6848 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6849 sub->datalen)) 6850 return; 6851 6852 control = le16_to_cpu(prof->control); 6853 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6854 6855 removed_links |= BIT(link_id); 6856 6857 /* the MAC address should not be included, but handle it */ 6858 if (control & 6859 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6860 pos += 6; 6861 6862 /* According to Draft P802.11be_D3.0, the control should 6863 * include the AP Removal Timer present. If the AP Removal Timer 6864 * is not present assume immediate removal. 6865 */ 6866 if (control & 6867 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6868 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6869 } 6870 6871 removed_links &= sdata->vif.valid_links; 6872 if (!removed_links) { 6873 /* In case the removal was cancelled, abort it */ 6874 if (sdata->u.mgd.removed_links) { 6875 sdata->u.mgd.removed_links = 0; 6876 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 6877 &sdata->u.mgd.ml_reconf_work); 6878 } 6879 return; 6880 } 6881 6882 delay = 0; 6883 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6884 struct ieee80211_bss_conf *link_conf = 6885 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6886 u32 link_delay; 6887 6888 if (!link_conf) { 6889 removed_links &= ~BIT(link_id); 6890 continue; 6891 } 6892 6893 if (link_removal_timeout[link_id] < 1) 6894 link_delay = 0; 6895 else 6896 link_delay = link_conf->beacon_int * 6897 (link_removal_timeout[link_id] - 1); 6898 6899 if (!delay) 6900 delay = link_delay; 6901 else 6902 delay = min(delay, link_delay); 6903 } 6904 6905 sdata->u.mgd.removed_links = removed_links; 6906 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 6907 &sdata->u.mgd.ml_reconf_work, 6908 us_to_ktime(ieee80211_tu_to_usec(delay))); 6909 } 6910 6911 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6912 u16 active_links, u16 dormant_links, 6913 u16 suspended_links) 6914 { 6915 u64 changed = 0; 6916 int ret; 6917 6918 if (!active_links) { 6919 ret = -EINVAL; 6920 goto out; 6921 } 6922 6923 /* If there is an active negotiated TTLM, it should be discarded by 6924 * the new negotiated/advertised TTLM. 6925 */ 6926 if (sdata->vif.neg_ttlm.valid) { 6927 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6928 sdata->vif.suspended_links = 0; 6929 changed = BSS_CHANGED_MLD_TTLM; 6930 } 6931 6932 if (sdata->vif.active_links != active_links) { 6933 /* usable links are affected when active_links are changed, 6934 * so notify the driver about the status change 6935 */ 6936 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6937 active_links &= sdata->vif.active_links; 6938 if (!active_links) 6939 active_links = 6940 BIT(__ffs(sdata->vif.valid_links & 6941 ~dormant_links)); 6942 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6943 if (ret) { 6944 sdata_info(sdata, "Failed to set TTLM active links\n"); 6945 goto out; 6946 } 6947 } 6948 6949 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6950 dormant_links); 6951 if (ret) { 6952 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6953 goto out; 6954 } 6955 6956 sdata->vif.suspended_links = suspended_links; 6957 if (sdata->vif.suspended_links) 6958 changed |= BSS_CHANGED_MLD_TTLM; 6959 6960 ieee80211_vif_cfg_change_notify(sdata, changed); 6961 6962 out: 6963 if (ret) 6964 ieee80211_disconnect(&sdata->vif, false); 6965 6966 return ret; 6967 } 6968 6969 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6970 struct wiphy_work *work) 6971 { 6972 u16 new_active_links, new_dormant_links; 6973 struct ieee80211_sub_if_data *sdata = 6974 container_of(work, struct ieee80211_sub_if_data, 6975 u.mgd.ttlm_work.work); 6976 6977 new_active_links = sdata->u.mgd.ttlm_info.map & 6978 sdata->vif.valid_links; 6979 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6980 sdata->vif.valid_links; 6981 6982 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6983 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6984 0)) 6985 return; 6986 6987 sdata->u.mgd.ttlm_info.active = true; 6988 sdata->u.mgd.ttlm_info.switch_time = 0; 6989 } 6990 6991 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6992 { 6993 if (bm_size == 1) 6994 return *data; 6995 else 6996 return get_unaligned_le16(data); 6997 } 6998 6999 static int 7000 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 7001 const struct ieee80211_ttlm_elem *ttlm, 7002 struct ieee80211_adv_ttlm_info *ttlm_info) 7003 { 7004 /* The element size was already validated in 7005 * ieee80211_tid_to_link_map_size_ok() 7006 */ 7007 u8 control, link_map_presence, map_size, tid; 7008 u8 *pos; 7009 7010 memset(ttlm_info, 0, sizeof(*ttlm_info)); 7011 pos = (void *)ttlm->optional; 7012 control = ttlm->control; 7013 7014 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 7015 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 7016 return 0; 7017 7018 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 7019 IEEE80211_TTLM_DIRECTION_BOTH) { 7020 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 7021 return -EINVAL; 7022 } 7023 7024 link_map_presence = *pos; 7025 pos++; 7026 7027 ttlm_info->switch_time = get_unaligned_le16(pos); 7028 7029 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 7030 * by 1. 7031 */ 7032 if (!ttlm_info->switch_time) 7033 ttlm_info->switch_time = 1; 7034 7035 pos += 2; 7036 7037 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 7038 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 7039 pos += 3; 7040 } 7041 7042 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7043 map_size = 1; 7044 else 7045 map_size = 2; 7046 7047 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 7048 * not advertise a TID-to-link mapping that does not map all TIDs to the 7049 * same link set, reject frame if not all links have mapping 7050 */ 7051 if (link_map_presence != 0xff) { 7052 sdata_info(sdata, 7053 "Invalid advertised T2L mapping presence indicator\n"); 7054 return -EINVAL; 7055 } 7056 7057 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7058 if (!ttlm_info->map) { 7059 sdata_info(sdata, 7060 "Invalid advertised T2L map for TID 0\n"); 7061 return -EINVAL; 7062 } 7063 7064 pos += map_size; 7065 7066 for (tid = 1; tid < 8; tid++) { 7067 u16 map = ieee80211_get_ttlm(map_size, pos); 7068 7069 if (map != ttlm_info->map) { 7070 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7071 tid); 7072 return -EINVAL; 7073 } 7074 7075 pos += map_size; 7076 } 7077 return 0; 7078 } 7079 7080 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7081 struct ieee802_11_elems *elems, 7082 u64 beacon_ts) 7083 { 7084 u8 i; 7085 int ret; 7086 7087 if (!ieee80211_vif_is_mld(&sdata->vif)) 7088 return; 7089 7090 if (!elems->ttlm_num) { 7091 if (sdata->u.mgd.ttlm_info.switch_time) { 7092 /* if a planned TID-to-link mapping was cancelled - 7093 * abort it 7094 */ 7095 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7096 &sdata->u.mgd.ttlm_work); 7097 } else if (sdata->u.mgd.ttlm_info.active) { 7098 /* if no TID-to-link element, set to default mapping in 7099 * which all TIDs are mapped to all setup links 7100 */ 7101 ret = ieee80211_vif_set_links(sdata, 7102 sdata->vif.valid_links, 7103 0); 7104 if (ret) { 7105 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7106 return; 7107 } 7108 ieee80211_vif_cfg_change_notify(sdata, 7109 BSS_CHANGED_MLD_VALID_LINKS); 7110 } 7111 memset(&sdata->u.mgd.ttlm_info, 0, 7112 sizeof(sdata->u.mgd.ttlm_info)); 7113 return; 7114 } 7115 7116 for (i = 0; i < elems->ttlm_num; i++) { 7117 struct ieee80211_adv_ttlm_info ttlm_info; 7118 u32 res; 7119 7120 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7121 &ttlm_info); 7122 7123 if (res) { 7124 __ieee80211_disconnect(sdata); 7125 return; 7126 } 7127 7128 if (ttlm_info.switch_time) { 7129 u16 beacon_ts_tu, st_tu, delay; 7130 u64 delay_usec; 7131 u64 mask; 7132 7133 /* The t2l map switch time is indicated with a partial 7134 * TSF value (bits 10 to 25), get the partial beacon TS 7135 * as well, and calc the delay to the start time. 7136 */ 7137 mask = GENMASK_ULL(25, 10); 7138 beacon_ts_tu = (beacon_ts & mask) >> 10; 7139 st_tu = ttlm_info.switch_time; 7140 delay = st_tu - beacon_ts_tu; 7141 7142 /* 7143 * If the switch time is far in the future, then it 7144 * could also be the previous switch still being 7145 * announced. 7146 * We can simply ignore it for now, if it is a future 7147 * switch the AP will continue to announce it anyway. 7148 */ 7149 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7150 return; 7151 7152 delay_usec = ieee80211_tu_to_usec(delay); 7153 7154 /* Link switching can take time, so schedule it 7155 * 100ms before to be ready on time 7156 */ 7157 if (delay_usec > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7158 delay_usec -= 7159 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7160 else 7161 delay_usec = 0; 7162 7163 sdata->u.mgd.ttlm_info = ttlm_info; 7164 wiphy_hrtimer_work_cancel(sdata->local->hw.wiphy, 7165 &sdata->u.mgd.ttlm_work); 7166 wiphy_hrtimer_work_queue(sdata->local->hw.wiphy, 7167 &sdata->u.mgd.ttlm_work, 7168 us_to_ktime(delay_usec)); 7169 return; 7170 } 7171 } 7172 } 7173 7174 static void 7175 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7176 int reporting_link_id, 7177 struct ieee802_11_elems *elems) 7178 { 7179 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7180 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7181 const struct element *sub; 7182 const u8 *subelems; 7183 size_t subelems_len; 7184 u8 common_size; 7185 int link_id; 7186 7187 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7188 return; 7189 7190 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7191 subelems = (u8 *)elems->ml_basic + common_size; 7192 subelems_len = elems->ml_basic_len - common_size; 7193 7194 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7195 subelems, subelems_len) { 7196 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7197 struct ieee80211_link_data *link; 7198 ssize_t len; 7199 7200 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7201 sub->datalen)) 7202 continue; 7203 7204 link_id = le16_get_bits(prof->control, 7205 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7206 /* need a valid link ID, but also not our own, both AP bugs */ 7207 if (link_id == reporting_link_id || 7208 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7209 continue; 7210 7211 link = sdata_dereference(sdata->link[link_id], sdata); 7212 if (!link) 7213 continue; 7214 7215 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7216 NULL, 0, 7217 IEEE80211_MLE_SUBELEM_FRAGMENT); 7218 if (WARN_ON(len < 0)) 7219 continue; 7220 7221 sta_profiles[link_id] = sub; 7222 sta_profiles_len[link_id] = len; 7223 } 7224 7225 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7226 struct ieee80211_mle_per_sta_profile *prof; 7227 struct ieee802_11_elems *prof_elems; 7228 struct ieee80211_link_data *link; 7229 ssize_t len; 7230 7231 if (link_id == reporting_link_id) 7232 continue; 7233 7234 link = sdata_dereference(sdata->link[link_id], sdata); 7235 if (!link) 7236 continue; 7237 7238 if (!sta_profiles[link_id]) { 7239 prof_elems = NULL; 7240 goto handle; 7241 } 7242 7243 /* we can defragment in-place, won't use the buffer again */ 7244 len = cfg80211_defragment_element(sta_profiles[link_id], 7245 subelems, subelems_len, 7246 (void *)sta_profiles[link_id], 7247 sta_profiles_len[link_id], 7248 IEEE80211_MLE_SUBELEM_FRAGMENT); 7249 if (WARN_ON(len != sta_profiles_len[link_id])) 7250 continue; 7251 7252 prof = (void *)sta_profiles[link_id]; 7253 prof_elems = ieee802_11_parse_elems(prof->variable + 7254 (prof->sta_info_len - 1), 7255 len - 7256 (prof->sta_info_len - 1), 7257 IEEE80211_FTYPE_MGMT | 7258 IEEE80211_STYPE_BEACON, 7259 NULL); 7260 7261 /* memory allocation failed - let's hope that's transient */ 7262 if (!prof_elems) 7263 continue; 7264 7265 handle: 7266 /* 7267 * FIXME: the timings here are obviously incorrect, 7268 * but only older Intel drivers seem to care, and 7269 * those don't have MLO. If you really need this, 7270 * the problem is having to calculate it with the 7271 * TSF offset etc. The device_timestamp is still 7272 * correct, of course. 7273 */ 7274 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7275 IEEE80211_CSA_SOURCE_OTHER_LINK); 7276 kfree(prof_elems); 7277 } 7278 } 7279 7280 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7281 const struct ieee802_11_elems *elems) 7282 { 7283 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7284 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7285 7286 if (!elems->ssid) 7287 return false; 7288 7289 /* hidden SSID: zero length */ 7290 if (elems->ssid_len == 0) 7291 return false; 7292 7293 if (elems->ssid_len != cfg->ssid_len) 7294 return true; 7295 7296 /* hidden SSID: zeroed out */ 7297 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7298 return false; 7299 7300 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7301 } 7302 7303 static bool 7304 ieee80211_rx_beacon_freq_valid(struct ieee80211_local *local, 7305 struct ieee80211_mgmt *mgmt, 7306 struct ieee80211_rx_status *rx_status, 7307 struct ieee80211_chanctx_conf *chanctx) 7308 { 7309 u32 pri_2mhz_khz; 7310 struct ieee80211_channel *s1g_sibling_1mhz; 7311 u32 pri_khz = ieee80211_channel_to_khz(chanctx->def.chan); 7312 u32 rx_khz = ieee80211_rx_status_to_khz(rx_status); 7313 7314 if (rx_khz == pri_khz) 7315 return true; 7316 7317 if (!chanctx->def.s1g_primary_2mhz) 7318 return false; 7319 7320 /* 7321 * If we have an S1G interface with a 2MHz primary, beacons are 7322 * sent on the center frequency of the 2MHz primary. Find the sibling 7323 * 1MHz channel and calculate the 2MHz primary center frequency. 7324 */ 7325 s1g_sibling_1mhz = cfg80211_s1g_get_primary_sibling(local->hw.wiphy, 7326 &chanctx->def); 7327 if (!s1g_sibling_1mhz) 7328 return false; 7329 7330 pri_2mhz_khz = 7331 (pri_khz + ieee80211_channel_to_khz(s1g_sibling_1mhz)) / 2; 7332 return rx_khz == pri_2mhz_khz; 7333 } 7334 7335 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7336 struct ieee80211_hdr *hdr, size_t len, 7337 struct ieee80211_rx_status *rx_status) 7338 { 7339 struct ieee80211_sub_if_data *sdata = link->sdata; 7340 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7341 struct ieee80211_bss_conf *bss_conf = link->conf; 7342 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7343 struct ieee80211_mgmt *mgmt = (void *) hdr; 7344 struct ieee80211_ext *ext = NULL; 7345 size_t baselen; 7346 struct ieee802_11_elems *elems; 7347 struct ieee80211_local *local = sdata->local; 7348 struct ieee80211_chanctx_conf *chanctx_conf; 7349 struct ieee80211_supported_band *sband; 7350 struct ieee80211_channel *chan; 7351 struct link_sta_info *link_sta; 7352 struct sta_info *sta; 7353 u64 changed = 0; 7354 bool erp_valid; 7355 u8 erp_value = 0; 7356 u32 ncrc = 0; 7357 u8 *bssid, *variable = mgmt->u.beacon.variable; 7358 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7359 struct ieee80211_elems_parse_params parse_params = { 7360 .mode = link->u.mgd.conn.mode, 7361 .link_id = -1, 7362 .from_ap = true, 7363 .type = le16_to_cpu(mgmt->frame_control) & IEEE80211_FCTL_TYPE, 7364 }; 7365 7366 lockdep_assert_wiphy(local->hw.wiphy); 7367 7368 /* Process beacon from the current BSS */ 7369 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7370 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7371 ext = (void *)mgmt; 7372 variable = ext->u.s1g_beacon.variable + 7373 ieee80211_s1g_optional_len(ext->frame_control); 7374 } 7375 7376 baselen = (u8 *) variable - (u8 *) mgmt; 7377 if (baselen > len) 7378 return; 7379 7380 parse_params.start = variable; 7381 parse_params.len = len - baselen; 7382 7383 rcu_read_lock(); 7384 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7385 if (!chanctx_conf) { 7386 rcu_read_unlock(); 7387 return; 7388 } 7389 7390 if (!ieee80211_rx_beacon_freq_valid(local, mgmt, rx_status, 7391 chanctx_conf)) { 7392 rcu_read_unlock(); 7393 return; 7394 } 7395 chan = chanctx_conf->def.chan; 7396 rcu_read_unlock(); 7397 7398 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7399 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7400 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7401 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7402 elems = ieee802_11_parse_elems_full(&parse_params); 7403 if (!elems) 7404 return; 7405 7406 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7407 7408 if (elems->dtim_period) 7409 link->u.mgd.dtim_period = elems->dtim_period; 7410 link->u.mgd.have_beacon = true; 7411 ifmgd->assoc_data->need_beacon = false; 7412 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7413 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7414 bss_conf->sync_tsf = 7415 le64_to_cpu(mgmt->u.beacon.timestamp); 7416 bss_conf->sync_device_ts = 7417 rx_status->device_timestamp; 7418 bss_conf->sync_dtim_count = elems->dtim_count; 7419 } 7420 7421 if (elems->mbssid_config_ie) 7422 bss_conf->profile_periodicity = 7423 elems->mbssid_config_ie->profile_periodicity; 7424 else 7425 bss_conf->profile_periodicity = 0; 7426 7427 if (elems->ext_capab_len >= 11 && 7428 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7429 bss_conf->ema_ap = true; 7430 else 7431 bss_conf->ema_ap = false; 7432 7433 /* continue assoc process */ 7434 ifmgd->assoc_data->timeout = jiffies; 7435 ifmgd->assoc_data->timeout_started = true; 7436 run_again(sdata, ifmgd->assoc_data->timeout); 7437 kfree(elems); 7438 return; 7439 } 7440 7441 if (!ifmgd->associated || 7442 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7443 return; 7444 bssid = link->u.mgd.bssid; 7445 7446 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7447 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7448 local, rx_status); 7449 7450 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7451 mlme_dbg_ratelimited(sdata, 7452 "cancelling AP probe due to a received beacon\n"); 7453 ieee80211_reset_ap_probe(sdata); 7454 } 7455 7456 /* 7457 * Push the beacon loss detection into the future since 7458 * we are processing a beacon from the AP just now. 7459 */ 7460 ieee80211_sta_reset_beacon_monitor(sdata); 7461 7462 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7463 * element (which carries the beacon interval). Don't forget to add a 7464 * bit to care_about_ies[] above if mac80211 is interested in a 7465 * changing S1G element. 7466 */ 7467 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7468 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7469 parse_params.bss = bss_conf->bss; 7470 parse_params.filter = care_about_ies; 7471 parse_params.crc = ncrc; 7472 elems = ieee802_11_parse_elems_full(&parse_params); 7473 if (!elems) 7474 return; 7475 7476 if (rx_status->flag & RX_FLAG_DECRYPTED && 7477 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7478 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7479 sdata->vif.cfg.ap_addr); 7480 __ieee80211_disconnect(sdata); 7481 return; 7482 } 7483 7484 ncrc = elems->crc; 7485 7486 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7487 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid, 7488 vif_cfg->s1g)) { 7489 if (local->hw.conf.dynamic_ps_timeout > 0) { 7490 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7491 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7492 ieee80211_hw_config(local, -1, 7493 IEEE80211_CONF_CHANGE_PS); 7494 } 7495 ieee80211_send_nullfunc(local, sdata, false); 7496 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7497 local->pspolling = true; 7498 7499 /* 7500 * Here is assumed that the driver will be 7501 * able to send ps-poll frame and receive a 7502 * response even though power save mode is 7503 * enabled, but some drivers might require 7504 * to disable power save here. This needs 7505 * to be investigated. 7506 */ 7507 ieee80211_send_pspoll(local, sdata); 7508 } 7509 } 7510 7511 if (sdata->vif.p2p || 7512 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7513 struct ieee80211_p2p_noa_attr noa = {}; 7514 int ret; 7515 7516 ret = cfg80211_get_p2p_attr(variable, 7517 len - baselen, 7518 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7519 (u8 *) &noa, sizeof(noa)); 7520 if (ret >= 2) { 7521 if (link->u.mgd.p2p_noa_index != noa.index) { 7522 /* valid noa_attr and index changed */ 7523 link->u.mgd.p2p_noa_index = noa.index; 7524 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7525 changed |= BSS_CHANGED_P2P_PS; 7526 /* 7527 * make sure we update all information, the CRC 7528 * mechanism doesn't look at P2P attributes. 7529 */ 7530 link->u.mgd.beacon_crc_valid = false; 7531 } 7532 } else if (link->u.mgd.p2p_noa_index != -1) { 7533 /* noa_attr not found and we had valid noa_attr before */ 7534 link->u.mgd.p2p_noa_index = -1; 7535 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7536 changed |= BSS_CHANGED_P2P_PS; 7537 link->u.mgd.beacon_crc_valid = false; 7538 } 7539 } 7540 7541 /* 7542 * Update beacon timing and dtim count on every beacon appearance. This 7543 * will allow the driver to use the most updated values. Do it before 7544 * comparing this one with last received beacon. 7545 * IMPORTANT: These parameters would possibly be out of sync by the time 7546 * the driver will use them. The synchronized view is currently 7547 * guaranteed only in certain callbacks. 7548 */ 7549 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7550 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7551 bss_conf->sync_tsf = 7552 le64_to_cpu(mgmt->u.beacon.timestamp); 7553 bss_conf->sync_device_ts = 7554 rx_status->device_timestamp; 7555 bss_conf->sync_dtim_count = elems->dtim_count; 7556 } 7557 7558 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7559 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7560 parse_params.start, 7561 parse_params.len))) 7562 goto free; 7563 link->u.mgd.beacon_crc = ncrc; 7564 link->u.mgd.beacon_crc_valid = true; 7565 7566 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7567 7568 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7569 rx_status->device_timestamp, 7570 elems, elems, 7571 IEEE80211_CSA_SOURCE_BEACON); 7572 7573 /* note that after this elems->ml_basic can no longer be used fully */ 7574 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7575 7576 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7577 7578 if (!sdata->u.mgd.epcs.enabled && 7579 !link->u.mgd.disable_wmm_tracking && 7580 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7581 elems->wmm_param_len, 7582 elems->mu_edca_param_set)) 7583 changed |= BSS_CHANGED_QOS; 7584 7585 /* 7586 * If we haven't had a beacon before, tell the driver about the 7587 * DTIM period (and beacon timing if desired) now. 7588 */ 7589 if (!link->u.mgd.have_beacon) { 7590 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7591 bss_conf->dtim_period = elems->dtim_period ?: 1; 7592 7593 changed |= BSS_CHANGED_BEACON_INFO; 7594 link->u.mgd.have_beacon = true; 7595 7596 ieee80211_recalc_ps(local); 7597 7598 ieee80211_recalc_ps_vif(sdata); 7599 } 7600 7601 if (elems->erp_info) { 7602 erp_valid = true; 7603 erp_value = elems->erp_info[0]; 7604 } else { 7605 erp_valid = false; 7606 } 7607 7608 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7609 changed |= ieee80211_handle_bss_capability(link, 7610 le16_to_cpu(mgmt->u.beacon.capab_info), 7611 erp_valid, erp_value); 7612 7613 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7614 if (WARN_ON(!sta)) { 7615 goto free; 7616 } 7617 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7618 lockdep_is_held(&local->hw.wiphy->mtx)); 7619 if (WARN_ON(!link_sta)) { 7620 goto free; 7621 } 7622 7623 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7624 goto free; 7625 7626 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7627 7628 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7629 7630 if (ieee80211_config_bw(link, elems, true, &changed, 7631 IEEE80211_STYPE_BEACON)) { 7632 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7633 WLAN_REASON_DEAUTH_LEAVING, 7634 true, deauth_buf); 7635 ieee80211_report_disconnect(sdata, deauth_buf, 7636 sizeof(deauth_buf), true, 7637 WLAN_REASON_DEAUTH_LEAVING, 7638 false); 7639 goto free; 7640 } 7641 7642 if (elems->opmode_notif) 7643 ieee80211_vht_handle_opmode(sdata, link_sta, 7644 *elems->opmode_notif, 7645 rx_status->band); 7646 7647 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7648 elems->country_elem, 7649 elems->country_elem_len, 7650 elems->pwr_constr_elem, 7651 elems->cisco_dtpc_elem); 7652 7653 ieee80211_ml_reconfiguration(sdata, elems); 7654 ieee80211_process_adv_ttlm(sdata, elems, 7655 le64_to_cpu(mgmt->u.beacon.timestamp)); 7656 7657 ieee80211_link_info_change_notify(sdata, link, changed); 7658 free: 7659 kfree(elems); 7660 } 7661 7662 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7663 struct ieee80211_neg_ttlm neg_ttlm) 7664 { 7665 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7666 u8 i; 7667 7668 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7669 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7670 7671 /* If there is an active TTLM, unset previously suspended links */ 7672 if (sdata->vif.neg_ttlm.valid) 7673 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7674 7675 /* exclude links that are already disabled by advertised TTLM */ 7676 new_active_links = 7677 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7678 new_suspended_links = 7679 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7680 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7681 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7682 new_dormant_links, new_suspended_links)) 7683 return; 7684 7685 sdata->vif.neg_ttlm = neg_ttlm; 7686 sdata->vif.neg_ttlm.valid = true; 7687 } 7688 7689 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7690 struct wiphy_work *work) 7691 { 7692 struct ieee80211_sub_if_data *sdata = 7693 container_of(work, struct ieee80211_sub_if_data, 7694 u.mgd.neg_ttlm_timeout_work.work); 7695 7696 sdata_info(sdata, 7697 "No negotiated TTLM response from AP, disconnecting.\n"); 7698 7699 __ieee80211_disconnect(sdata); 7700 } 7701 7702 static void 7703 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7704 struct ieee80211_neg_ttlm *neg_ttlm) 7705 { 7706 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7707 7708 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7709 sizeof(neg_ttlm->downlink))) { 7710 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7711 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7712 } else { 7713 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7714 } 7715 7716 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7717 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7718 __le16 map; 7719 7720 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7721 7722 pos = skb_put(skb, len + 2); 7723 *pos++ = WLAN_EID_EXTENSION; 7724 len_pos = pos++; 7725 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7726 *pos++ = direction[i]; 7727 map_ind_pos = pos++; 7728 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7729 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7730 cpu_to_le16(neg_ttlm->uplink[tid]) : 7731 cpu_to_le16(neg_ttlm->downlink[tid]); 7732 if (!map) 7733 continue; 7734 7735 len += 2; 7736 map_ind |= BIT(tid); 7737 skb_put_data(skb, &map, sizeof(map)); 7738 } 7739 7740 *map_ind_pos = map_ind; 7741 *len_pos = len; 7742 7743 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7744 break; 7745 } 7746 } 7747 7748 static void 7749 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7750 struct ieee80211_neg_ttlm *neg_ttlm, 7751 u8 dialog_token) 7752 { 7753 struct ieee80211_local *local = sdata->local; 7754 struct ieee80211_mgmt *mgmt; 7755 struct sk_buff *skb; 7756 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7757 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7758 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7759 7760 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7761 if (!skb) 7762 return; 7763 7764 skb_reserve(skb, local->tx_headroom); 7765 mgmt = skb_put_zero(skb, hdr_len); 7766 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7767 IEEE80211_STYPE_ACTION); 7768 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7769 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7770 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7771 7772 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7773 mgmt->u.action.u.ttlm_req.action_code = 7774 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7775 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7776 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7777 ieee80211_tx_skb(sdata, skb); 7778 } 7779 7780 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7781 struct cfg80211_ttlm_params *params) 7782 { 7783 struct ieee80211_neg_ttlm neg_ttlm = {}; 7784 u8 i; 7785 7786 if (!ieee80211_vif_is_mld(&sdata->vif) || 7787 !(sdata->vif.cfg.mld_capa_op & 7788 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7789 return -EINVAL; 7790 7791 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7792 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7793 (params->ulink[i] & ~sdata->vif.valid_links)) 7794 return -EINVAL; 7795 7796 neg_ttlm.downlink[i] = params->dlink[i]; 7797 neg_ttlm.uplink[i] = params->ulink[i]; 7798 } 7799 7800 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7801 NEG_TTLM_RES_ACCEPT) 7802 return -EINVAL; 7803 7804 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7805 sdata->u.mgd.dialog_token_alloc++; 7806 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7807 sdata->u.mgd.dialog_token_alloc); 7808 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7809 &sdata->u.mgd.neg_ttlm_timeout_work); 7810 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7811 &sdata->u.mgd.neg_ttlm_timeout_work, 7812 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7813 return 0; 7814 } 7815 7816 static void 7817 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7818 enum ieee80211_neg_ttlm_res ttlm_res, 7819 u8 dialog_token, 7820 struct ieee80211_neg_ttlm *neg_ttlm) 7821 { 7822 struct ieee80211_local *local = sdata->local; 7823 struct ieee80211_mgmt *mgmt; 7824 struct sk_buff *skb; 7825 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7826 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7827 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7828 u16 status_code; 7829 7830 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7831 if (!skb) 7832 return; 7833 7834 skb_reserve(skb, local->tx_headroom); 7835 mgmt = skb_put_zero(skb, hdr_len); 7836 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7837 IEEE80211_STYPE_ACTION); 7838 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7839 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7840 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7841 7842 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7843 mgmt->u.action.u.ttlm_res.action_code = 7844 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7845 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7846 switch (ttlm_res) { 7847 default: 7848 WARN_ON(1); 7849 fallthrough; 7850 case NEG_TTLM_RES_REJECT: 7851 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7852 break; 7853 case NEG_TTLM_RES_ACCEPT: 7854 status_code = WLAN_STATUS_SUCCESS; 7855 break; 7856 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7857 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7858 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7859 break; 7860 } 7861 7862 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7863 ieee80211_tx_skb(sdata, skb); 7864 } 7865 7866 static int 7867 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7868 const struct ieee80211_ttlm_elem *ttlm, 7869 struct ieee80211_neg_ttlm *neg_ttlm, 7870 u8 *direction) 7871 { 7872 u8 control, link_map_presence, map_size, tid; 7873 u8 *pos; 7874 7875 /* The element size was already validated in 7876 * ieee80211_tid_to_link_map_size_ok() 7877 */ 7878 pos = (void *)ttlm->optional; 7879 7880 control = ttlm->control; 7881 7882 /* mapping switch time and expected duration fields are not expected 7883 * in case of negotiated TTLM 7884 */ 7885 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7886 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7887 mlme_dbg(sdata, 7888 "Invalid TTLM element in negotiated TTLM request\n"); 7889 return -EINVAL; 7890 } 7891 7892 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7893 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7894 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7895 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7896 } 7897 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7898 return 0; 7899 } 7900 7901 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7902 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7903 *direction != IEEE80211_TTLM_DIRECTION_UP && 7904 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7905 return -EINVAL; 7906 7907 link_map_presence = *pos; 7908 pos++; 7909 7910 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7911 map_size = 1; 7912 else 7913 map_size = 2; 7914 7915 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7916 u16 map; 7917 7918 if (link_map_presence & BIT(tid)) { 7919 map = ieee80211_get_ttlm(map_size, pos); 7920 if (!map) { 7921 mlme_dbg(sdata, 7922 "No active links for TID %d", tid); 7923 return -EINVAL; 7924 } 7925 } else { 7926 map = 0; 7927 } 7928 7929 switch (*direction) { 7930 case IEEE80211_TTLM_DIRECTION_BOTH: 7931 neg_ttlm->downlink[tid] = map; 7932 neg_ttlm->uplink[tid] = map; 7933 break; 7934 case IEEE80211_TTLM_DIRECTION_DOWN: 7935 neg_ttlm->downlink[tid] = map; 7936 break; 7937 case IEEE80211_TTLM_DIRECTION_UP: 7938 neg_ttlm->uplink[tid] = map; 7939 break; 7940 default: 7941 return -EINVAL; 7942 } 7943 pos += map_size; 7944 } 7945 return 0; 7946 } 7947 7948 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7949 struct ieee80211_mgmt *mgmt, size_t len) 7950 { 7951 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7952 size_t ies_len; 7953 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7954 struct ieee802_11_elems *elems = NULL; 7955 struct ieee80211_neg_ttlm neg_ttlm = {}; 7956 7957 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7958 7959 if (!ieee80211_vif_is_mld(&sdata->vif)) 7960 return; 7961 7962 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7963 ies_len = len - offsetof(struct ieee80211_mgmt, 7964 u.action.u.ttlm_req.variable); 7965 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7966 ies_len, 7967 IEEE80211_FTYPE_MGMT | 7968 IEEE80211_STYPE_ACTION, 7969 NULL); 7970 if (!elems) { 7971 ttlm_res = NEG_TTLM_RES_REJECT; 7972 goto out; 7973 } 7974 7975 for (i = 0; i < elems->ttlm_num; i++) { 7976 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7977 &neg_ttlm, &direction[i]) || 7978 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7979 elems->ttlm_num != 1)) { 7980 ttlm_res = NEG_TTLM_RES_REJECT; 7981 goto out; 7982 } 7983 } 7984 7985 if (!elems->ttlm_num || 7986 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7987 ttlm_res = NEG_TTLM_RES_REJECT; 7988 goto out; 7989 } 7990 7991 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7992 if ((neg_ttlm.downlink[i] && 7993 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7994 (neg_ttlm.uplink[i] && 7995 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7996 ttlm_res = NEG_TTLM_RES_REJECT; 7997 goto out; 7998 } 7999 } 8000 8001 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 8002 8003 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 8004 goto out; 8005 8006 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 8007 out: 8008 kfree(elems); 8009 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 8010 } 8011 8012 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 8013 struct ieee80211_mgmt *mgmt, size_t len) 8014 { 8015 if (!ieee80211_vif_is_mld(&sdata->vif) || 8016 mgmt->u.action.u.ttlm_req.dialog_token != 8017 sdata->u.mgd.dialog_token_alloc) 8018 return; 8019 8020 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8021 &sdata->u.mgd.neg_ttlm_timeout_work); 8022 8023 /* MLD station sends a TID to link mapping request, mainly to handle 8024 * BTM (BSS transition management) request, in which case it needs to 8025 * restrict the active links set. 8026 * In this case it's not expected that the MLD AP will reject the 8027 * negotiated TTLM request. 8028 * This can be better implemented in the future, to handle request 8029 * rejections. 8030 */ 8031 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 8032 __ieee80211_disconnect(sdata); 8033 } 8034 8035 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 8036 { 8037 u16 new_dormant_links; 8038 8039 if (!sdata->vif.neg_ttlm.valid) 8040 return; 8041 8042 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 8043 new_dormant_links = 8044 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 8045 sdata->vif.suspended_links = 0; 8046 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 8047 new_dormant_links); 8048 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 8049 BSS_CHANGED_MLD_VALID_LINKS); 8050 } 8051 8052 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 8053 struct wiphy_work *work) 8054 { 8055 struct ieee80211_sub_if_data *sdata = 8056 container_of(work, struct ieee80211_sub_if_data, 8057 u.mgd.teardown_ttlm_work); 8058 8059 ieee80211_process_ttlm_teardown(sdata); 8060 } 8061 8062 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 8063 { 8064 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8065 struct ieee80211_local *local = sdata->local; 8066 struct ieee80211_mgmt *mgmt; 8067 struct sk_buff *skb; 8068 int frame_len = offsetofend(struct ieee80211_mgmt, 8069 u.action.u.ttlm_tear_down); 8070 struct ieee80211_tx_info *info; 8071 8072 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8073 if (!skb) 8074 return; 8075 8076 skb_reserve(skb, local->hw.extra_tx_headroom); 8077 mgmt = skb_put_zero(skb, frame_len); 8078 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8079 IEEE80211_STYPE_ACTION); 8080 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8081 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8082 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8083 8084 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8085 mgmt->u.action.u.ttlm_tear_down.action_code = 8086 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8087 8088 info = IEEE80211_SKB_CB(skb); 8089 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8090 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8091 ieee80211_tx_skb(sdata, skb); 8092 } 8093 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8094 8095 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8096 struct sk_buff *skb) 8097 { 8098 struct ieee80211_link_data *link = &sdata->deflink; 8099 struct ieee80211_rx_status *rx_status; 8100 struct ieee80211_hdr *hdr; 8101 u16 fc; 8102 8103 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8104 8105 rx_status = (struct ieee80211_rx_status *) skb->cb; 8106 hdr = (struct ieee80211_hdr *) skb->data; 8107 fc = le16_to_cpu(hdr->frame_control); 8108 8109 switch (fc & IEEE80211_FCTL_STYPE) { 8110 case IEEE80211_STYPE_S1G_BEACON: 8111 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8112 break; 8113 } 8114 } 8115 8116 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8117 struct sk_buff *skb) 8118 { 8119 struct ieee80211_link_data *link = &sdata->deflink; 8120 struct ieee80211_rx_status *rx_status; 8121 struct ieee802_11_elems *elems; 8122 struct ieee80211_mgmt *mgmt; 8123 u16 fc; 8124 int ies_len; 8125 8126 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8127 8128 rx_status = (struct ieee80211_rx_status *) skb->cb; 8129 mgmt = (struct ieee80211_mgmt *) skb->data; 8130 fc = le16_to_cpu(mgmt->frame_control); 8131 8132 if (rx_status->link_valid) { 8133 link = sdata_dereference(sdata->link[rx_status->link_id], 8134 sdata); 8135 if (!link) 8136 return; 8137 } 8138 8139 switch (fc & IEEE80211_FCTL_STYPE) { 8140 case IEEE80211_STYPE_BEACON: 8141 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8142 skb->len, rx_status); 8143 break; 8144 case IEEE80211_STYPE_PROBE_RESP: 8145 ieee80211_rx_mgmt_probe_resp(link, skb); 8146 break; 8147 case IEEE80211_STYPE_AUTH: 8148 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8149 break; 8150 case IEEE80211_STYPE_DEAUTH: 8151 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8152 break; 8153 case IEEE80211_STYPE_DISASSOC: 8154 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8155 break; 8156 case IEEE80211_STYPE_ASSOC_RESP: 8157 case IEEE80211_STYPE_REASSOC_RESP: 8158 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8159 break; 8160 case IEEE80211_STYPE_ACTION: 8161 if (!sdata->u.mgd.associated || 8162 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8163 break; 8164 8165 switch (mgmt->u.action.category) { 8166 case WLAN_CATEGORY_SPECTRUM_MGMT: 8167 ies_len = skb->len - 8168 offsetof(struct ieee80211_mgmt, 8169 u.action.u.chan_switch.variable); 8170 8171 if (ies_len < 0) 8172 break; 8173 8174 /* CSA IE cannot be overridden, no need for BSSID */ 8175 elems = ieee802_11_parse_elems(mgmt->u.action.u.chan_switch.variable, 8176 ies_len, 8177 IEEE80211_FTYPE_MGMT | 8178 IEEE80211_STYPE_ACTION, 8179 NULL); 8180 8181 if (elems && !elems->parse_error) { 8182 enum ieee80211_csa_source src = 8183 IEEE80211_CSA_SOURCE_PROT_ACTION; 8184 8185 ieee80211_sta_process_chanswitch(link, 8186 rx_status->mactime, 8187 rx_status->device_timestamp, 8188 elems, elems, 8189 src); 8190 } 8191 kfree(elems); 8192 break; 8193 case WLAN_CATEGORY_PUBLIC: 8194 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8195 ies_len = skb->len - 8196 offsetof(struct ieee80211_mgmt, 8197 u.action.u.ext_chan_switch.variable); 8198 8199 if (ies_len < 0) 8200 break; 8201 8202 /* 8203 * extended CSA IE can't be overridden, no need for 8204 * BSSID 8205 */ 8206 elems = ieee802_11_parse_elems(mgmt->u.action.u.ext_chan_switch.variable, 8207 ies_len, 8208 IEEE80211_FTYPE_MGMT | 8209 IEEE80211_STYPE_ACTION, 8210 NULL); 8211 8212 if (elems && !elems->parse_error) { 8213 enum ieee80211_csa_source src; 8214 8215 if (mgmt->u.action.category == 8216 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8217 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8218 else 8219 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8220 8221 /* for the handling code pretend it was an IE */ 8222 elems->ext_chansw_ie = 8223 &mgmt->u.action.u.ext_chan_switch.data; 8224 8225 ieee80211_sta_process_chanswitch(link, 8226 rx_status->mactime, 8227 rx_status->device_timestamp, 8228 elems, elems, 8229 src); 8230 } 8231 8232 kfree(elems); 8233 break; 8234 } 8235 break; 8236 } 8237 } 8238 8239 static void ieee80211_sta_timer(struct timer_list *t) 8240 { 8241 struct ieee80211_sub_if_data *sdata = 8242 timer_container_of(sdata, t, u.mgd.timer); 8243 8244 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8245 } 8246 8247 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8248 u8 reason, bool tx) 8249 { 8250 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8251 8252 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8253 tx, frame_buf); 8254 8255 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8256 reason, false); 8257 } 8258 8259 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8260 { 8261 struct ieee80211_local *local = sdata->local; 8262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8263 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8264 u32 tx_flags = 0; 8265 u16 trans = 1; 8266 u16 status = 0; 8267 struct ieee80211_prep_tx_info info = { 8268 .subtype = IEEE80211_STYPE_AUTH, 8269 }; 8270 8271 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8272 8273 if (WARN_ON_ONCE(!auth_data)) 8274 return -EINVAL; 8275 8276 auth_data->tries++; 8277 8278 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8279 sdata_info(sdata, "authentication with %pM timed out\n", 8280 auth_data->ap_addr); 8281 8282 /* 8283 * Most likely AP is not in the range so remove the 8284 * bss struct for that AP. 8285 */ 8286 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8287 8288 return -ETIMEDOUT; 8289 } 8290 8291 if (auth_data->algorithm == WLAN_AUTH_SAE) 8292 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8293 8294 info.link_id = auth_data->link_id; 8295 drv_mgd_prepare_tx(local, sdata, &info); 8296 8297 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8298 auth_data->ap_addr, auth_data->tries, 8299 IEEE80211_AUTH_MAX_TRIES); 8300 8301 auth_data->expected_transaction = 2; 8302 8303 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8304 trans = auth_data->sae_trans; 8305 status = auth_data->sae_status; 8306 auth_data->expected_transaction = trans; 8307 } 8308 8309 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8310 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8311 IEEE80211_TX_INTFL_MLME_CONN_TX; 8312 8313 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8314 auth_data->data, auth_data->data_len, 8315 auth_data->ap_addr, auth_data->ap_addr, 8316 NULL, 0, 0, tx_flags); 8317 8318 if (tx_flags == 0) { 8319 if (auth_data->algorithm == WLAN_AUTH_SAE) 8320 auth_data->timeout = jiffies + 8321 IEEE80211_AUTH_TIMEOUT_SAE; 8322 else 8323 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8324 } else { 8325 auth_data->timeout = 8326 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8327 } 8328 8329 auth_data->timeout_started = true; 8330 run_again(sdata, auth_data->timeout); 8331 8332 return 0; 8333 } 8334 8335 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8336 { 8337 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8338 struct ieee80211_local *local = sdata->local; 8339 int ret; 8340 8341 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8342 8343 assoc_data->tries++; 8344 assoc_data->comeback = false; 8345 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8346 sdata_info(sdata, "association with %pM timed out\n", 8347 assoc_data->ap_addr); 8348 8349 /* 8350 * Most likely AP is not in the range so remove the 8351 * bss struct for that AP. 8352 */ 8353 cfg80211_unlink_bss(local->hw.wiphy, 8354 assoc_data->link[assoc_data->assoc_link_id].bss); 8355 8356 return -ETIMEDOUT; 8357 } 8358 8359 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8360 assoc_data->ap_addr, assoc_data->tries, 8361 IEEE80211_ASSOC_MAX_TRIES); 8362 ret = ieee80211_send_assoc(sdata); 8363 if (ret) 8364 return ret; 8365 8366 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8367 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8368 assoc_data->timeout_started = true; 8369 run_again(sdata, assoc_data->timeout); 8370 } else { 8371 assoc_data->timeout = 8372 round_jiffies_up(jiffies + 8373 IEEE80211_ASSOC_TIMEOUT_LONG); 8374 assoc_data->timeout_started = true; 8375 run_again(sdata, assoc_data->timeout); 8376 } 8377 8378 return 0; 8379 } 8380 8381 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8382 __le16 fc, bool acked) 8383 { 8384 struct ieee80211_local *local = sdata->local; 8385 8386 sdata->u.mgd.status_fc = fc; 8387 sdata->u.mgd.status_acked = acked; 8388 sdata->u.mgd.status_received = true; 8389 8390 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8391 } 8392 8393 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8394 { 8395 struct ieee80211_local *local = sdata->local; 8396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8397 8398 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8399 8400 if (ifmgd->status_received) { 8401 __le16 fc = ifmgd->status_fc; 8402 bool status_acked = ifmgd->status_acked; 8403 8404 ifmgd->status_received = false; 8405 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8406 if (status_acked) { 8407 if (ifmgd->auth_data->algorithm == 8408 WLAN_AUTH_SAE) 8409 ifmgd->auth_data->timeout = 8410 jiffies + 8411 IEEE80211_AUTH_TIMEOUT_SAE; 8412 else 8413 ifmgd->auth_data->timeout = 8414 jiffies + 8415 IEEE80211_AUTH_TIMEOUT_SHORT; 8416 run_again(sdata, ifmgd->auth_data->timeout); 8417 } else { 8418 ifmgd->auth_data->timeout = jiffies - 1; 8419 } 8420 ifmgd->auth_data->timeout_started = true; 8421 } else if (ifmgd->assoc_data && 8422 !ifmgd->assoc_data->comeback && 8423 (ieee80211_is_assoc_req(fc) || 8424 ieee80211_is_reassoc_req(fc))) { 8425 /* 8426 * Update association timeout based on the TX status 8427 * for the (Re)Association Request frame. Skip this if 8428 * we have already processed a (Re)Association Response 8429 * frame that indicated need for association comeback 8430 * at a specific time in the future. This could happen 8431 * if the TX status information is delayed enough for 8432 * the response to be received and processed first. 8433 */ 8434 if (status_acked) { 8435 ifmgd->assoc_data->timeout = 8436 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8437 run_again(sdata, ifmgd->assoc_data->timeout); 8438 } else { 8439 ifmgd->assoc_data->timeout = jiffies - 1; 8440 } 8441 ifmgd->assoc_data->timeout_started = true; 8442 } 8443 } 8444 8445 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8446 time_after(jiffies, ifmgd->auth_data->timeout)) { 8447 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8448 /* 8449 * ok ... we waited for assoc or continuation but 8450 * userspace didn't do it, so kill the auth data 8451 */ 8452 ieee80211_destroy_auth_data(sdata, false); 8453 } else if (ieee80211_auth(sdata)) { 8454 u8 ap_addr[ETH_ALEN]; 8455 struct ieee80211_event event = { 8456 .type = MLME_EVENT, 8457 .u.mlme.data = AUTH_EVENT, 8458 .u.mlme.status = MLME_TIMEOUT, 8459 }; 8460 8461 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8462 8463 ieee80211_destroy_auth_data(sdata, false); 8464 8465 cfg80211_auth_timeout(sdata->dev, ap_addr); 8466 drv_event_callback(sdata->local, sdata, &event); 8467 } 8468 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8469 run_again(sdata, ifmgd->auth_data->timeout); 8470 8471 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8472 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8473 if ((ifmgd->assoc_data->need_beacon && 8474 !sdata->deflink.u.mgd.have_beacon) || 8475 ieee80211_do_assoc(sdata)) { 8476 struct ieee80211_event event = { 8477 .type = MLME_EVENT, 8478 .u.mlme.data = ASSOC_EVENT, 8479 .u.mlme.status = MLME_TIMEOUT, 8480 }; 8481 8482 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8483 drv_event_callback(sdata->local, sdata, &event); 8484 } 8485 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8486 run_again(sdata, ifmgd->assoc_data->timeout); 8487 8488 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8489 ifmgd->associated) { 8490 u8 *bssid = sdata->deflink.u.mgd.bssid; 8491 int max_tries; 8492 8493 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8494 max_tries = max_nullfunc_tries; 8495 else 8496 max_tries = max_probe_tries; 8497 8498 /* ACK received for nullfunc probing frame */ 8499 if (!ifmgd->probe_send_count) 8500 ieee80211_reset_ap_probe(sdata); 8501 else if (ifmgd->nullfunc_failed) { 8502 if (ifmgd->probe_send_count < max_tries) { 8503 mlme_dbg(sdata, 8504 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8505 bssid, ifmgd->probe_send_count, 8506 max_tries); 8507 ieee80211_mgd_probe_ap_send(sdata); 8508 } else { 8509 mlme_dbg(sdata, 8510 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8511 bssid); 8512 ieee80211_sta_connection_lost(sdata, 8513 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8514 false); 8515 } 8516 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8517 run_again(sdata, ifmgd->probe_timeout); 8518 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8519 mlme_dbg(sdata, 8520 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8521 bssid, probe_wait_ms); 8522 ieee80211_sta_connection_lost(sdata, 8523 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8524 } else if (ifmgd->probe_send_count < max_tries) { 8525 mlme_dbg(sdata, 8526 "No probe response from AP %pM after %dms, try %d/%i\n", 8527 bssid, probe_wait_ms, 8528 ifmgd->probe_send_count, max_tries); 8529 ieee80211_mgd_probe_ap_send(sdata); 8530 } else { 8531 /* 8532 * We actually lost the connection ... or did we? 8533 * Let's make sure! 8534 */ 8535 mlme_dbg(sdata, 8536 "No probe response from AP %pM after %dms, disconnecting.\n", 8537 bssid, probe_wait_ms); 8538 8539 ieee80211_sta_connection_lost(sdata, 8540 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8541 } 8542 } 8543 } 8544 8545 static bool 8546 ieee80211_is_csa_in_progress(struct ieee80211_sub_if_data *sdata) 8547 { 8548 /* 8549 * In MLO, check the CSA flags 'active' and 'waiting_bcn' for all 8550 * the links. 8551 */ 8552 struct ieee80211_link_data *link; 8553 8554 guard(rcu)(); 8555 8556 for_each_link_data_rcu(sdata, link) { 8557 if (!(link->conf->csa_active && 8558 !link->u.mgd.csa.waiting_bcn)) 8559 return false; 8560 } 8561 8562 return true; 8563 } 8564 8565 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8566 { 8567 struct ieee80211_sub_if_data *sdata = 8568 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8569 8570 if (ieee80211_is_csa_in_progress(sdata)) 8571 return; 8572 8573 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8574 return; 8575 8576 sdata->u.mgd.connection_loss = false; 8577 wiphy_work_queue(sdata->local->hw.wiphy, 8578 &sdata->u.mgd.beacon_connection_loss_work); 8579 } 8580 8581 static unsigned long 8582 ieee80211_latest_active_link_conn_timeout(struct ieee80211_sub_if_data *sdata) 8583 { 8584 unsigned long latest_timeout = jiffies; 8585 unsigned int link_id; 8586 struct sta_info *sta; 8587 8588 guard(rcu)(); 8589 8590 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8591 if (!sta) 8592 return 0; 8593 8594 for (link_id = 0; link_id < ARRAY_SIZE(sta->link); 8595 link_id++) { 8596 struct link_sta_info *link_sta; 8597 unsigned long timeout; 8598 8599 link_sta = rcu_dereference(sta->link[link_id]); 8600 if (!link_sta) 8601 continue; 8602 8603 timeout = link_sta->status_stats.last_ack; 8604 if (time_before(timeout, link_sta->rx_stats.last_rx)) 8605 timeout = link_sta->rx_stats.last_rx; 8606 8607 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8608 8609 /* 8610 * latest_timeout holds the timeout of the link 8611 * that will expire last among all links in an 8612 * non-AP MLD STA. This ensures that the connection 8613 * monitor timer is only reset if at least one link 8614 * is still active, and it is scheduled to fire at 8615 * the latest possible timeout. 8616 */ 8617 if (time_after(timeout, latest_timeout)) 8618 latest_timeout = timeout; 8619 } 8620 8621 return latest_timeout; 8622 } 8623 8624 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8625 { 8626 struct ieee80211_sub_if_data *sdata = 8627 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8628 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8629 struct ieee80211_local *local = sdata->local; 8630 unsigned long latest_timeout; 8631 8632 if (ieee80211_is_csa_in_progress(sdata)) 8633 return; 8634 8635 latest_timeout = ieee80211_latest_active_link_conn_timeout(sdata); 8636 8637 /* 8638 * If latest timeout is after now, then update timer to fire at 8639 * the later date, but do not actually probe at this time. 8640 */ 8641 if (time_is_after_jiffies(latest_timeout)) { 8642 mod_timer(&ifmgd->conn_mon_timer, 8643 round_jiffies_up(latest_timeout)); 8644 return; 8645 } 8646 8647 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8648 } 8649 8650 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8651 struct wiphy_work *work) 8652 { 8653 struct ieee80211_sub_if_data *sdata = 8654 container_of(work, struct ieee80211_sub_if_data, 8655 u.mgd.monitor_work); 8656 8657 ieee80211_mgd_probe_ap(sdata, false); 8658 } 8659 8660 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8661 { 8662 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8663 __ieee80211_stop_poll(sdata); 8664 8665 /* let's probe the connection once */ 8666 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8667 wiphy_work_queue(sdata->local->hw.wiphy, 8668 &sdata->u.mgd.monitor_work); 8669 } 8670 } 8671 8672 #ifdef CONFIG_PM 8673 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8674 { 8675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8676 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8677 8678 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8679 8680 if (ifmgd->auth_data || ifmgd->assoc_data) { 8681 const u8 *ap_addr = ifmgd->auth_data ? 8682 ifmgd->auth_data->ap_addr : 8683 ifmgd->assoc_data->ap_addr; 8684 8685 /* 8686 * If we are trying to authenticate / associate while suspending, 8687 * cfg80211 won't know and won't actually abort those attempts, 8688 * thus we need to do that ourselves. 8689 */ 8690 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8691 IEEE80211_STYPE_DEAUTH, 8692 WLAN_REASON_DEAUTH_LEAVING, 8693 false, frame_buf); 8694 if (ifmgd->assoc_data) 8695 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8696 if (ifmgd->auth_data) 8697 ieee80211_destroy_auth_data(sdata, false); 8698 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8699 IEEE80211_DEAUTH_FRAME_LEN, 8700 false); 8701 } 8702 8703 /* This is a bit of a hack - we should find a better and more generic 8704 * solution to this. Normally when suspending, cfg80211 will in fact 8705 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8706 * auth (not so important) or assoc (this is the problem) process. 8707 * 8708 * As a consequence, it can happen that we are in the process of both 8709 * associating and suspending, and receive an association response 8710 * after cfg80211 has checked if it needs to disconnect, but before 8711 * we actually set the flag to drop incoming frames. This will then 8712 * cause the workqueue flush to process the association response in 8713 * the suspend, resulting in a successful association just before it 8714 * tries to remove the interface from the driver, which now though 8715 * has a channel context assigned ... this results in issues. 8716 * 8717 * To work around this (for now) simply deauth here again if we're 8718 * now connected. 8719 */ 8720 if (ifmgd->associated && !sdata->local->wowlan) { 8721 u8 bssid[ETH_ALEN]; 8722 struct cfg80211_deauth_request req = { 8723 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8724 .bssid = bssid, 8725 }; 8726 8727 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8728 ieee80211_mgd_deauth(sdata, &req); 8729 } 8730 } 8731 #endif 8732 8733 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8734 { 8735 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8736 8737 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8738 8739 if (!ifmgd->associated) 8740 return; 8741 8742 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8743 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8744 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8745 ieee80211_sta_connection_lost(sdata, 8746 WLAN_REASON_UNSPECIFIED, 8747 true); 8748 return; 8749 } 8750 8751 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8752 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8753 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8754 ieee80211_sta_connection_lost(sdata, 8755 WLAN_REASON_UNSPECIFIED, 8756 true); 8757 return; 8758 } 8759 } 8760 8761 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8762 struct wiphy_work *work) 8763 { 8764 struct ieee80211_link_data *link = 8765 container_of(work, struct ieee80211_link_data, 8766 u.mgd.request_smps_work); 8767 8768 __ieee80211_request_smps_mgd(link->sdata, link, 8769 link->u.mgd.driver_smps_mode); 8770 } 8771 8772 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8773 struct wiphy_work *work) 8774 { 8775 struct ieee80211_sub_if_data *sdata = 8776 container_of(work, struct ieee80211_sub_if_data, 8777 u.mgd.reconf.wk.work); 8778 8779 if (!sdata->u.mgd.reconf.added_links && 8780 !sdata->u.mgd.reconf.removed_links) 8781 return; 8782 8783 sdata_info(sdata, 8784 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8785 sdata->u.mgd.reconf.added_links, 8786 sdata->u.mgd.reconf.removed_links); 8787 8788 __ieee80211_disconnect(sdata); 8789 } 8790 8791 /* interface setup */ 8792 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8793 { 8794 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8795 8796 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8797 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8798 ieee80211_beacon_connection_loss_work); 8799 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8800 ieee80211_csa_connection_drop_work); 8801 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8802 ieee80211_tdls_peer_del_work); 8803 wiphy_hrtimer_work_init(&ifmgd->ml_reconf_work, 8804 ieee80211_ml_reconf_work); 8805 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8806 ieee80211_ml_sta_reconf_timeout); 8807 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8808 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8809 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8810 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8811 ieee80211_sta_handle_tspec_ac_params_wk); 8812 wiphy_hrtimer_work_init(&ifmgd->ttlm_work, 8813 ieee80211_tid_to_link_map_work); 8814 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8815 ieee80211_neg_ttlm_timeout_work); 8816 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8817 ieee80211_teardown_ttlm_work); 8818 8819 ifmgd->flags = 0; 8820 ifmgd->powersave = sdata->wdev.ps; 8821 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8822 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8823 /* Setup TDLS data */ 8824 spin_lock_init(&ifmgd->teardown_lock); 8825 ifmgd->teardown_skb = NULL; 8826 ifmgd->orig_teardown_skb = NULL; 8827 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8828 } 8829 8830 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8831 struct wiphy_work *work) 8832 { 8833 struct ieee80211_link_data *link = 8834 container_of(work, struct ieee80211_link_data, 8835 u.mgd.recalc_smps); 8836 8837 ieee80211_recalc_smps(link->sdata, link); 8838 } 8839 8840 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8841 { 8842 struct ieee80211_sub_if_data *sdata = link->sdata; 8843 struct ieee80211_local *local = sdata->local; 8844 unsigned int link_id = link->link_id; 8845 8846 link->u.mgd.p2p_noa_index = -1; 8847 link->conf->bssid = link->u.mgd.bssid; 8848 link->smps_mode = IEEE80211_SMPS_OFF; 8849 8850 wiphy_work_init(&link->u.mgd.request_smps_work, 8851 ieee80211_request_smps_mgd_work); 8852 wiphy_work_init(&link->u.mgd.recalc_smps, 8853 ieee80211_recalc_smps_work); 8854 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8855 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8856 else 8857 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8858 8859 wiphy_hrtimer_work_init(&link->u.mgd.csa.switch_work, 8860 ieee80211_csa_switch_work); 8861 8862 ieee80211_clear_tpe(&link->conf->tpe); 8863 8864 if (sdata->u.mgd.assoc_data) 8865 ether_addr_copy(link->conf->addr, 8866 sdata->u.mgd.assoc_data->link[link_id].addr); 8867 else if (sdata->u.mgd.reconf.add_links_data) 8868 ether_addr_copy(link->conf->addr, 8869 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8870 else if (!is_valid_ether_addr(link->conf->addr)) 8871 eth_random_addr(link->conf->addr); 8872 } 8873 8874 /* scan finished notification */ 8875 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8876 { 8877 struct ieee80211_sub_if_data *sdata; 8878 8879 /* Restart STA timers */ 8880 rcu_read_lock(); 8881 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8882 if (ieee80211_sdata_running(sdata)) 8883 ieee80211_restart_sta_timer(sdata); 8884 } 8885 rcu_read_unlock(); 8886 } 8887 8888 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8889 struct cfg80211_bss *cbss, s8 link_id, 8890 const u8 *ap_mld_addr, bool assoc, 8891 struct ieee80211_conn_settings *conn, 8892 bool override, 8893 unsigned long *userspace_selectors) 8894 { 8895 struct ieee80211_local *local = sdata->local; 8896 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8897 struct ieee80211_bss *bss = (void *)cbss->priv; 8898 struct sta_info *new_sta = NULL; 8899 struct ieee80211_link_data *link; 8900 bool have_sta = false; 8901 bool mlo; 8902 int err; 8903 u16 new_links; 8904 8905 if (link_id >= 0) { 8906 mlo = true; 8907 if (WARN_ON(!ap_mld_addr)) 8908 return -EINVAL; 8909 new_links = BIT(link_id); 8910 } else { 8911 if (WARN_ON(ap_mld_addr)) 8912 return -EINVAL; 8913 ap_mld_addr = cbss->bssid; 8914 new_links = 0; 8915 link_id = 0; 8916 mlo = false; 8917 } 8918 8919 if (assoc) { 8920 rcu_read_lock(); 8921 have_sta = sta_info_get(sdata, ap_mld_addr); 8922 rcu_read_unlock(); 8923 } 8924 8925 if (mlo && !have_sta && 8926 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8927 return -EINVAL; 8928 8929 err = ieee80211_vif_set_links(sdata, new_links, 0); 8930 if (err) 8931 return err; 8932 8933 link = sdata_dereference(sdata->link[link_id], sdata); 8934 if (WARN_ON(!link)) { 8935 err = -ENOLINK; 8936 goto out_err; 8937 } 8938 8939 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8940 err = -EINVAL; 8941 goto out_err; 8942 } 8943 8944 /* If a reconfig is happening, bail out */ 8945 if (local->in_reconfig) { 8946 err = -EBUSY; 8947 goto out_err; 8948 } 8949 8950 if (!have_sta) { 8951 if (mlo) 8952 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8953 link_id, cbss->bssid, 8954 GFP_KERNEL); 8955 else 8956 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8957 8958 if (!new_sta) { 8959 err = -ENOMEM; 8960 goto out_err; 8961 } 8962 8963 new_sta->sta.mlo = mlo; 8964 } 8965 8966 /* 8967 * Set up the information for the new channel before setting the 8968 * new channel. We can't - completely race-free - change the basic 8969 * rates bitmap and the channel (sband) that it refers to, but if 8970 * we set it up before we at least avoid calling into the driver's 8971 * bss_info_changed() method with invalid information (since we do 8972 * call that from changing the channel - only for IDLE and perhaps 8973 * some others, but ...). 8974 * 8975 * So to avoid that, just set up all the new information before the 8976 * channel, but tell the driver to apply it only afterwards, since 8977 * it might need the new channel for that. 8978 */ 8979 if (new_sta) { 8980 const struct cfg80211_bss_ies *ies; 8981 struct link_sta_info *link_sta; 8982 8983 rcu_read_lock(); 8984 link_sta = rcu_dereference(new_sta->link[link_id]); 8985 if (WARN_ON(!link_sta)) { 8986 rcu_read_unlock(); 8987 sta_info_free(local, new_sta); 8988 err = -EINVAL; 8989 goto out_err; 8990 } 8991 8992 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8993 link_sta, cbss); 8994 if (err) { 8995 rcu_read_unlock(); 8996 sta_info_free(local, new_sta); 8997 goto out_err; 8998 } 8999 9000 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 9001 9002 /* set timing information */ 9003 link->conf->beacon_int = cbss->beacon_interval; 9004 ies = rcu_dereference(cbss->beacon_ies); 9005 if (ies) { 9006 link->conf->sync_tsf = ies->tsf; 9007 link->conf->sync_device_ts = 9008 bss->device_ts_beacon; 9009 9010 ieee80211_get_dtim(ies, 9011 &link->conf->sync_dtim_count, 9012 NULL); 9013 } else if (!ieee80211_hw_check(&sdata->local->hw, 9014 TIMING_BEACON_ONLY)) { 9015 ies = rcu_dereference(cbss->proberesp_ies); 9016 /* must be non-NULL since beacon IEs were NULL */ 9017 link->conf->sync_tsf = ies->tsf; 9018 link->conf->sync_device_ts = 9019 bss->device_ts_presp; 9020 link->conf->sync_dtim_count = 0; 9021 } else { 9022 link->conf->sync_tsf = 0; 9023 link->conf->sync_device_ts = 0; 9024 link->conf->sync_dtim_count = 0; 9025 } 9026 rcu_read_unlock(); 9027 } 9028 9029 if (new_sta || override) { 9030 /* 9031 * Only set this if we're also going to calculate the AP 9032 * settings etc., otherwise this was set before in a 9033 * previous call. Note override is set to %true in assoc 9034 * if the settings were changed. 9035 */ 9036 link->u.mgd.conn = *conn; 9037 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 9038 mlo, &link->u.mgd.conn, 9039 userspace_selectors); 9040 if (err) { 9041 if (new_sta) 9042 sta_info_free(local, new_sta); 9043 goto out_err; 9044 } 9045 /* pass out for use in assoc */ 9046 *conn = link->u.mgd.conn; 9047 } 9048 9049 if (new_sta) { 9050 /* 9051 * tell driver about BSSID, basic rates and timing 9052 * this was set up above, before setting the channel 9053 */ 9054 ieee80211_link_info_change_notify(sdata, link, 9055 BSS_CHANGED_BSSID | 9056 BSS_CHANGED_BASIC_RATES | 9057 BSS_CHANGED_BEACON_INT); 9058 9059 if (assoc) 9060 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 9061 9062 err = sta_info_insert(new_sta); 9063 new_sta = NULL; 9064 if (err) { 9065 sdata_info(sdata, 9066 "failed to insert STA entry for the AP (error %d)\n", 9067 err); 9068 goto out_release_chan; 9069 } 9070 } else 9071 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 9072 9073 /* Cancel scan to ensure that nothing interferes with connection */ 9074 if (local->scanning) 9075 ieee80211_scan_cancel(local); 9076 9077 return 0; 9078 9079 out_release_chan: 9080 ieee80211_link_release_channel(link); 9081 out_err: 9082 ieee80211_vif_set_links(sdata, 0, 0); 9083 return err; 9084 } 9085 9086 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 9087 const struct cfg80211_bss_ies *ies, 9088 u8 cur_channel, bool ignore_ecsa) 9089 { 9090 const struct element *csa_elem, *ecsa_elem; 9091 struct ieee80211_channel_sw_ie *csa = NULL; 9092 struct ieee80211_ext_chansw_ie *ecsa = NULL; 9093 9094 if (!ies) 9095 return false; 9096 9097 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 9098 ies->data, ies->len); 9099 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 9100 csa = (void *)csa_elem->data; 9101 9102 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 9103 ies->data, ies->len); 9104 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 9105 ecsa = (void *)ecsa_elem->data; 9106 9107 if (csa && csa->count == 0) 9108 csa = NULL; 9109 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 9110 csa = NULL; 9111 9112 if (ecsa && ecsa->count == 0) 9113 ecsa = NULL; 9114 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 9115 ecsa = NULL; 9116 9117 if (ignore_ecsa && ecsa) { 9118 sdata_info(sdata, 9119 "Ignoring ECSA in probe response - was considered stuck!\n"); 9120 return csa; 9121 } 9122 9123 return csa || ecsa; 9124 } 9125 9126 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9127 struct cfg80211_bss *bss) 9128 { 9129 u8 cur_channel; 9130 bool ret; 9131 9132 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9133 9134 rcu_read_lock(); 9135 if (ieee80211_mgd_csa_present(sdata, 9136 rcu_dereference(bss->beacon_ies), 9137 cur_channel, false)) { 9138 ret = true; 9139 goto out; 9140 } 9141 9142 if (ieee80211_mgd_csa_present(sdata, 9143 rcu_dereference(bss->proberesp_ies), 9144 cur_channel, bss->proberesp_ecsa_stuck)) { 9145 ret = true; 9146 goto out; 9147 } 9148 9149 ret = false; 9150 out: 9151 rcu_read_unlock(); 9152 return ret; 9153 } 9154 9155 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9156 const u8 *supported_selectors, 9157 u8 supported_selectors_len) 9158 { 9159 if (supported_selectors) { 9160 for (int i = 0; i < supported_selectors_len; i++) { 9161 set_bit(supported_selectors[i], 9162 userspace_selectors); 9163 } 9164 } else { 9165 /* Assume SAE_H2E support for backward compatibility. */ 9166 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9167 userspace_selectors); 9168 } 9169 } 9170 9171 /* config hooks */ 9172 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9173 struct cfg80211_auth_request *req) 9174 { 9175 struct ieee80211_local *local = sdata->local; 9176 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9177 struct ieee80211_mgd_auth_data *auth_data; 9178 struct ieee80211_conn_settings conn; 9179 struct ieee80211_link_data *link; 9180 struct ieee80211_supported_band *sband; 9181 struct ieee80211_bss *bss; 9182 u16 auth_alg; 9183 int err; 9184 bool cont_auth, wmm_used; 9185 9186 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9187 9188 /* prepare auth data structure */ 9189 9190 switch (req->auth_type) { 9191 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9192 auth_alg = WLAN_AUTH_OPEN; 9193 break; 9194 case NL80211_AUTHTYPE_SHARED_KEY: 9195 if (fips_enabled) 9196 return -EOPNOTSUPP; 9197 auth_alg = WLAN_AUTH_SHARED_KEY; 9198 break; 9199 case NL80211_AUTHTYPE_FT: 9200 auth_alg = WLAN_AUTH_FT; 9201 break; 9202 case NL80211_AUTHTYPE_NETWORK_EAP: 9203 auth_alg = WLAN_AUTH_LEAP; 9204 break; 9205 case NL80211_AUTHTYPE_SAE: 9206 auth_alg = WLAN_AUTH_SAE; 9207 break; 9208 case NL80211_AUTHTYPE_FILS_SK: 9209 auth_alg = WLAN_AUTH_FILS_SK; 9210 break; 9211 case NL80211_AUTHTYPE_FILS_SK_PFS: 9212 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9213 break; 9214 case NL80211_AUTHTYPE_FILS_PK: 9215 auth_alg = WLAN_AUTH_FILS_PK; 9216 break; 9217 default: 9218 return -EOPNOTSUPP; 9219 } 9220 9221 if (ifmgd->assoc_data) 9222 return -EBUSY; 9223 9224 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9225 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9226 return -EINVAL; 9227 } 9228 9229 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9230 req->ie_len, GFP_KERNEL); 9231 if (!auth_data) 9232 return -ENOMEM; 9233 9234 memcpy(auth_data->ap_addr, 9235 req->ap_mld_addr ?: req->bss->bssid, 9236 ETH_ALEN); 9237 auth_data->bss = req->bss; 9238 auth_data->link_id = req->link_id; 9239 9240 if (req->auth_data_len >= 4) { 9241 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9242 __le16 *pos = (__le16 *) req->auth_data; 9243 9244 auth_data->sae_trans = le16_to_cpu(pos[0]); 9245 auth_data->sae_status = le16_to_cpu(pos[1]); 9246 } 9247 memcpy(auth_data->data, req->auth_data + 4, 9248 req->auth_data_len - 4); 9249 auth_data->data_len += req->auth_data_len - 4; 9250 } 9251 9252 /* Check if continuing authentication or trying to authenticate with the 9253 * same BSS that we were in the process of authenticating with and avoid 9254 * removal and re-addition of the STA entry in 9255 * ieee80211_prep_connection(). 9256 */ 9257 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9258 ifmgd->auth_data->link_id == req->link_id; 9259 9260 if (req->ie && req->ie_len) { 9261 memcpy(&auth_data->data[auth_data->data_len], 9262 req->ie, req->ie_len); 9263 auth_data->data_len += req->ie_len; 9264 } 9265 9266 if (req->key && req->key_len) { 9267 auth_data->key_len = req->key_len; 9268 auth_data->key_idx = req->key_idx; 9269 memcpy(auth_data->key, req->key, req->key_len); 9270 } 9271 9272 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9273 req->supported_selectors, 9274 req->supported_selectors_len); 9275 9276 auth_data->algorithm = auth_alg; 9277 9278 /* try to authenticate/probe */ 9279 9280 if (ifmgd->auth_data) { 9281 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9282 auth_data->peer_confirmed = 9283 ifmgd->auth_data->peer_confirmed; 9284 } 9285 ieee80211_destroy_auth_data(sdata, cont_auth); 9286 } 9287 9288 /* prep auth_data so we don't go into idle on disassoc */ 9289 ifmgd->auth_data = auth_data; 9290 9291 /* If this is continuation of an ongoing SAE authentication exchange 9292 * (i.e., request to send SAE Confirm) and the peer has already 9293 * confirmed, mark authentication completed since we are about to send 9294 * out SAE Confirm. 9295 */ 9296 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9297 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9298 ieee80211_mark_sta_auth(sdata); 9299 9300 if (ifmgd->associated) { 9301 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9302 9303 sdata_info(sdata, 9304 "disconnect from AP %pM for new auth to %pM\n", 9305 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9306 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9307 WLAN_REASON_UNSPECIFIED, 9308 false, frame_buf); 9309 9310 ieee80211_report_disconnect(sdata, frame_buf, 9311 sizeof(frame_buf), true, 9312 WLAN_REASON_UNSPECIFIED, 9313 false); 9314 } 9315 9316 /* needed for transmitting the auth frame(s) properly */ 9317 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9318 9319 bss = (void *)req->bss->priv; 9320 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9321 9322 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9323 9324 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9325 &conn); 9326 9327 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9328 req->ap_mld_addr, cont_auth, 9329 &conn, false, 9330 auth_data->userspace_selectors); 9331 if (err) 9332 goto err_clear; 9333 9334 if (req->link_id >= 0) 9335 link = sdata_dereference(sdata->link[req->link_id], sdata); 9336 else 9337 link = &sdata->deflink; 9338 9339 if (WARN_ON(!link)) { 9340 err = -ENOLINK; 9341 goto err_clear; 9342 } 9343 9344 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9345 auth_data->ap_addr, link->conf->addr); 9346 9347 err = ieee80211_auth(sdata); 9348 if (err) { 9349 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9350 goto err_clear; 9351 } 9352 9353 /* hold our own reference */ 9354 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9355 return 0; 9356 9357 err_clear: 9358 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9359 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9360 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9361 BSS_CHANGED_BSSID); 9362 ieee80211_link_release_channel(&sdata->deflink); 9363 } 9364 ifmgd->auth_data = NULL; 9365 kfree(auth_data); 9366 return err; 9367 } 9368 9369 static void 9370 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9371 struct ieee80211_mgd_assoc_data *assoc_data, 9372 struct cfg80211_assoc_request *req, 9373 struct ieee80211_conn_settings *conn, 9374 unsigned int link_id) 9375 { 9376 struct ieee80211_local *local = sdata->local; 9377 const struct cfg80211_bss_ies *bss_ies; 9378 struct ieee80211_supported_band *sband; 9379 struct ieee80211_link_data *link; 9380 struct cfg80211_bss *cbss; 9381 struct ieee80211_bss *bss; 9382 9383 cbss = assoc_data->link[link_id].bss; 9384 if (WARN_ON(!cbss)) 9385 return; 9386 9387 bss = (void *)cbss->priv; 9388 9389 sband = local->hw.wiphy->bands[cbss->channel->band]; 9390 if (WARN_ON(!sband)) 9391 return; 9392 9393 link = sdata_dereference(sdata->link[link_id], sdata); 9394 if (WARN_ON(!link)) 9395 return; 9396 9397 /* for MLO connections assume advertising all rates is OK */ 9398 if (!req->ap_mld_addr) { 9399 assoc_data->supp_rates = bss->supp_rates; 9400 assoc_data->supp_rates_len = bss->supp_rates_len; 9401 } 9402 9403 /* copy and link elems for the STA profile */ 9404 if (req->links[link_id].elems_len) { 9405 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9406 req->links[link_id].elems_len); 9407 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9408 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9409 assoc_data->ie_pos += req->links[link_id].elems_len; 9410 } 9411 9412 link->u.mgd.beacon_crc_valid = false; 9413 link->u.mgd.dtim_period = 0; 9414 link->u.mgd.have_beacon = false; 9415 9416 /* override HT configuration only if the AP and we support it */ 9417 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9418 struct ieee80211_sta_ht_cap sta_ht_cap; 9419 9420 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9421 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9422 } 9423 9424 rcu_read_lock(); 9425 bss_ies = rcu_dereference(cbss->beacon_ies); 9426 if (bss_ies) { 9427 u8 dtim_count = 0; 9428 9429 ieee80211_get_dtim(bss_ies, &dtim_count, 9430 &link->u.mgd.dtim_period); 9431 9432 sdata->deflink.u.mgd.have_beacon = true; 9433 9434 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9435 link->conf->sync_tsf = bss_ies->tsf; 9436 link->conf->sync_device_ts = bss->device_ts_beacon; 9437 link->conf->sync_dtim_count = dtim_count; 9438 } 9439 } else { 9440 bss_ies = rcu_dereference(cbss->ies); 9441 } 9442 9443 if (bss_ies) { 9444 const struct element *elem; 9445 9446 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9447 bss_ies->data, bss_ies->len); 9448 if (elem && elem->datalen >= 3) 9449 link->conf->profile_periodicity = elem->data[2]; 9450 else 9451 link->conf->profile_periodicity = 0; 9452 9453 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9454 bss_ies->data, bss_ies->len); 9455 if (elem && elem->datalen >= 11 && 9456 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9457 link->conf->ema_ap = true; 9458 else 9459 link->conf->ema_ap = false; 9460 } 9461 rcu_read_unlock(); 9462 9463 if (bss->corrupt_data) { 9464 char *corrupt_type = "data"; 9465 9466 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9467 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9468 corrupt_type = "beacon and probe response"; 9469 else 9470 corrupt_type = "beacon"; 9471 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9472 corrupt_type = "probe response"; 9473 } 9474 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9475 cbss->bssid, corrupt_type); 9476 } 9477 9478 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9479 if (sdata->u.mgd.powersave) 9480 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9481 else 9482 link->smps_mode = IEEE80211_SMPS_OFF; 9483 } else { 9484 link->smps_mode = link->u.mgd.req_smps; 9485 } 9486 } 9487 9488 static int 9489 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9490 struct ieee80211_mgd_assoc_data *assoc_data, 9491 int link_id) 9492 { 9493 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9494 enum nl80211_band band = cbss->channel->band; 9495 struct ieee80211_supported_band *sband; 9496 const struct element *elem; 9497 int err; 9498 9499 /* neither HT nor VHT elements used on 6 GHz */ 9500 if (band == NL80211_BAND_6GHZ) 9501 return 0; 9502 9503 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9504 return 0; 9505 9506 rcu_read_lock(); 9507 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9508 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9509 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9510 cbss->bssid); 9511 err = -EINVAL; 9512 goto out_rcu; 9513 } 9514 assoc_data->link[link_id].ap_ht_param = 9515 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9516 rcu_read_unlock(); 9517 9518 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9519 return 0; 9520 9521 /* some drivers want to support VHT on 2.4 GHz even */ 9522 sband = sdata->local->hw.wiphy->bands[band]; 9523 if (!sband->vht_cap.vht_supported) 9524 return 0; 9525 9526 rcu_read_lock(); 9527 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9528 /* but even then accept it not being present on the AP */ 9529 if (!elem && band == NL80211_BAND_2GHZ) { 9530 err = 0; 9531 goto out_rcu; 9532 } 9533 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9534 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9535 cbss->bssid); 9536 err = -EINVAL; 9537 goto out_rcu; 9538 } 9539 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9540 sizeof(struct ieee80211_vht_cap)); 9541 rcu_read_unlock(); 9542 9543 return 0; 9544 out_rcu: 9545 rcu_read_unlock(); 9546 return err; 9547 } 9548 9549 static bool 9550 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9551 { 9552 const struct cfg80211_bss_ies *ies; 9553 struct cfg80211_bss *bss; 9554 const struct element *ml; 9555 9556 /* not an MLO connection if link_id < 0, so irrelevant */ 9557 if (req->link_id < 0) 9558 return false; 9559 9560 bss = req->links[req->link_id].bss; 9561 9562 guard(rcu)(); 9563 ies = rcu_dereference(bss->ies); 9564 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9565 ies->data, ies->len) { 9566 const struct ieee80211_multi_link_elem *mle; 9567 9568 if (!ieee80211_mle_type_ok(ml->data + 1, 9569 IEEE80211_ML_CONTROL_TYPE_BASIC, 9570 ml->datalen - 1)) 9571 continue; 9572 9573 mle = (void *)(ml->data + 1); 9574 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9575 return true; 9576 } 9577 9578 return false; 9579 9580 } 9581 9582 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9583 struct cfg80211_assoc_request *req) 9584 { 9585 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9586 struct ieee80211_local *local = sdata->local; 9587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9588 struct ieee80211_mgd_assoc_data *assoc_data; 9589 const struct element *ssid_elem; 9590 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9591 struct ieee80211_link_data *link; 9592 struct cfg80211_bss *cbss; 9593 bool override, uapsd_supported; 9594 bool match_auth; 9595 int i, err; 9596 size_t size = sizeof(*assoc_data) + req->ie_len; 9597 9598 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9599 size += req->links[i].elems_len; 9600 9601 /* FIXME: no support for 4-addr MLO yet */ 9602 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9603 return -EOPNOTSUPP; 9604 9605 assoc_data = kzalloc(size, GFP_KERNEL); 9606 if (!assoc_data) 9607 return -ENOMEM; 9608 9609 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9610 9611 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9612 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9613 err = -EINVAL; 9614 goto err_free; 9615 } 9616 9617 rcu_read_lock(); 9618 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9619 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9620 rcu_read_unlock(); 9621 err = -EINVAL; 9622 goto err_free; 9623 } 9624 9625 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9626 assoc_data->ssid_len = ssid_elem->datalen; 9627 rcu_read_unlock(); 9628 9629 if (req->ap_mld_addr) 9630 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9631 else 9632 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9633 9634 /* 9635 * Many APs have broken parsing of the extended MLD capa/ops field, 9636 * dropping (re-)association request frames or replying with association 9637 * response with a failure status if it's present. 9638 * Set our value from the userspace request only in strict mode or if 9639 * the AP also had that field present. 9640 */ 9641 if (ieee80211_hw_check(&local->hw, STRICT) || 9642 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9643 assoc_data->ext_mld_capa_ops = 9644 cpu_to_le16(req->ext_mld_capa_ops); 9645 9646 if (ifmgd->associated) { 9647 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9648 9649 sdata_info(sdata, 9650 "disconnect from AP %pM for new assoc to %pM\n", 9651 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9652 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9653 WLAN_REASON_UNSPECIFIED, 9654 false, frame_buf); 9655 9656 ieee80211_report_disconnect(sdata, frame_buf, 9657 sizeof(frame_buf), true, 9658 WLAN_REASON_UNSPECIFIED, 9659 false); 9660 } 9661 9662 memset(sdata->u.mgd.userspace_selectors, 0, 9663 sizeof(sdata->u.mgd.userspace_selectors)); 9664 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9665 req->supported_selectors, 9666 req->supported_selectors_len); 9667 9668 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9669 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9670 sizeof(ifmgd->ht_capa_mask)); 9671 9672 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9673 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9674 sizeof(ifmgd->vht_capa_mask)); 9675 9676 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9677 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9678 sizeof(ifmgd->s1g_capa_mask)); 9679 9680 /* keep some setup (AP STA, channel, ...) if matching */ 9681 match_auth = ifmgd->auth_data && 9682 ether_addr_equal(ifmgd->auth_data->ap_addr, 9683 assoc_data->ap_addr) && 9684 ifmgd->auth_data->link_id == req->link_id; 9685 9686 if (req->ap_mld_addr) { 9687 uapsd_supported = true; 9688 9689 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9690 ASSOC_REQ_DISABLE_VHT | 9691 ASSOC_REQ_DISABLE_HE | 9692 ASSOC_REQ_DISABLE_EHT)) { 9693 err = -EINVAL; 9694 goto err_free; 9695 } 9696 9697 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9698 struct ieee80211_supported_band *sband; 9699 struct cfg80211_bss *link_cbss = req->links[i].bss; 9700 struct ieee80211_bss *bss; 9701 9702 if (!link_cbss) 9703 continue; 9704 9705 bss = (void *)link_cbss->priv; 9706 9707 if (!bss->wmm_used) { 9708 err = -EINVAL; 9709 req->links[i].error = err; 9710 goto err_free; 9711 } 9712 9713 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9714 err = -EINVAL; 9715 req->links[i].error = err; 9716 goto err_free; 9717 } 9718 9719 link = sdata_dereference(sdata->link[i], sdata); 9720 if (link) 9721 ether_addr_copy(assoc_data->link[i].addr, 9722 link->conf->addr); 9723 else 9724 eth_random_addr(assoc_data->link[i].addr); 9725 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9726 9727 if (match_auth && i == assoc_link_id && link) 9728 assoc_data->link[i].conn = link->u.mgd.conn; 9729 else 9730 assoc_data->link[i].conn = 9731 ieee80211_conn_settings_unlimited; 9732 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9733 req, true, i, 9734 &assoc_data->link[i].conn); 9735 assoc_data->link[i].bss = link_cbss; 9736 assoc_data->link[i].disabled = req->links[i].disabled; 9737 9738 if (!bss->uapsd_supported) 9739 uapsd_supported = false; 9740 9741 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9742 err = -EINVAL; 9743 req->links[i].error = err; 9744 goto err_free; 9745 } 9746 9747 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9748 assoc_data, i); 9749 if (err) { 9750 err = -EINVAL; 9751 req->links[i].error = err; 9752 goto err_free; 9753 } 9754 } 9755 9756 assoc_data->wmm = true; 9757 } else { 9758 struct ieee80211_supported_band *sband; 9759 struct ieee80211_bss *bss = (void *)cbss->priv; 9760 9761 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9762 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9763 9764 assoc_data->wmm = bss->wmm_used && 9765 (local->hw.queues >= IEEE80211_NUM_ACS); 9766 9767 if (cbss->channel->band == NL80211_BAND_6GHZ && 9768 req->flags & (ASSOC_REQ_DISABLE_HT | 9769 ASSOC_REQ_DISABLE_VHT | 9770 ASSOC_REQ_DISABLE_HE)) { 9771 err = -EINVAL; 9772 goto err_free; 9773 } 9774 9775 sband = local->hw.wiphy->bands[cbss->channel->band]; 9776 9777 assoc_data->link[0].bss = cbss; 9778 9779 if (match_auth) 9780 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9781 else 9782 assoc_data->link[0].conn = 9783 ieee80211_conn_settings_unlimited; 9784 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9785 assoc_data->wmm, 0, 9786 &assoc_data->link[0].conn); 9787 9788 uapsd_supported = bss->uapsd_supported; 9789 9790 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9791 if (err) 9792 goto err_free; 9793 } 9794 9795 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9796 9797 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9798 err = -EBUSY; 9799 goto err_free; 9800 } 9801 9802 if (ifmgd->assoc_data) { 9803 err = -EBUSY; 9804 goto err_free; 9805 } 9806 9807 /* Cleanup is delayed if auth_data matches */ 9808 if (ifmgd->auth_data && !match_auth) 9809 ieee80211_destroy_auth_data(sdata, false); 9810 9811 if (req->ie && req->ie_len) { 9812 memcpy(assoc_data->ie, req->ie, req->ie_len); 9813 assoc_data->ie_len = req->ie_len; 9814 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9815 } else { 9816 assoc_data->ie_pos = assoc_data->ie; 9817 } 9818 9819 if (req->fils_kek) { 9820 /* should already be checked in cfg80211 - so warn */ 9821 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9822 err = -EINVAL; 9823 goto err_free; 9824 } 9825 memcpy(assoc_data->fils_kek, req->fils_kek, 9826 req->fils_kek_len); 9827 assoc_data->fils_kek_len = req->fils_kek_len; 9828 } 9829 9830 if (req->fils_nonces) 9831 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9832 2 * FILS_NONCE_LEN); 9833 9834 /* default timeout */ 9835 assoc_data->timeout = jiffies; 9836 assoc_data->timeout_started = true; 9837 9838 assoc_data->assoc_link_id = assoc_link_id; 9839 9840 if (req->ap_mld_addr) { 9841 /* if there was no authentication, set up the link */ 9842 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9843 if (err) 9844 goto err_clear; 9845 } 9846 9847 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9848 if (WARN_ON(!link)) { 9849 err = -EINVAL; 9850 goto err_clear; 9851 } 9852 9853 override = link->u.mgd.conn.mode != 9854 assoc_data->link[assoc_link_id].conn.mode || 9855 link->u.mgd.conn.bw_limit != 9856 assoc_data->link[assoc_link_id].conn.bw_limit; 9857 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9858 9859 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9860 assoc_link_id); 9861 9862 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9863 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9864 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9865 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9866 9867 if (assoc_data->wmm && uapsd_supported && 9868 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9869 assoc_data->uapsd = true; 9870 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9871 } else { 9872 assoc_data->uapsd = false; 9873 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9874 } 9875 9876 if (req->prev_bssid) 9877 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9878 9879 if (req->use_mfp) { 9880 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9881 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9882 } else { 9883 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9884 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9885 } 9886 9887 if (req->flags & ASSOC_REQ_USE_RRM) 9888 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9889 else 9890 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9891 9892 if (req->crypto.control_port) 9893 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9894 else 9895 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9896 9897 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9898 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9899 sdata->control_port_over_nl80211 = 9900 req->crypto.control_port_over_nl80211; 9901 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9902 9903 /* kick off associate process */ 9904 ifmgd->assoc_data = assoc_data; 9905 9906 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9907 if (!assoc_data->link[i].bss) 9908 continue; 9909 if (i == assoc_data->assoc_link_id) 9910 continue; 9911 /* only calculate the mode, hence link == NULL */ 9912 err = ieee80211_prep_channel(sdata, NULL, i, 9913 assoc_data->link[i].bss, true, 9914 &assoc_data->link[i].conn, 9915 sdata->u.mgd.userspace_selectors); 9916 if (err) { 9917 req->links[i].error = err; 9918 goto err_clear; 9919 } 9920 } 9921 9922 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9923 vif_cfg->ssid_len = assoc_data->ssid_len; 9924 9925 /* needed for transmitting the assoc frames properly */ 9926 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9927 9928 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9929 req->ap_mld_addr, true, 9930 &assoc_data->link[assoc_link_id].conn, 9931 override, 9932 sdata->u.mgd.userspace_selectors); 9933 if (err) 9934 goto err_clear; 9935 9936 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9937 const struct cfg80211_bss_ies *beacon_ies; 9938 9939 rcu_read_lock(); 9940 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9941 if (!beacon_ies) { 9942 /* 9943 * Wait up to one beacon interval ... 9944 * should this be more if we miss one? 9945 */ 9946 sdata_info(sdata, "waiting for beacon from %pM\n", 9947 link->u.mgd.bssid); 9948 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9949 assoc_data->timeout_started = true; 9950 assoc_data->need_beacon = true; 9951 } 9952 rcu_read_unlock(); 9953 } 9954 9955 run_again(sdata, assoc_data->timeout); 9956 9957 /* We are associating, clean up auth_data */ 9958 if (ifmgd->auth_data) 9959 ieee80211_destroy_auth_data(sdata, true); 9960 9961 return 0; 9962 err_clear: 9963 if (!ifmgd->auth_data) { 9964 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9965 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9966 BSS_CHANGED_BSSID); 9967 } 9968 ifmgd->assoc_data = NULL; 9969 err_free: 9970 kfree(assoc_data); 9971 return err; 9972 } 9973 9974 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9975 struct cfg80211_deauth_request *req) 9976 { 9977 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9978 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9979 bool tx = !req->local_state_change; 9980 struct ieee80211_prep_tx_info info = { 9981 .subtype = IEEE80211_STYPE_DEAUTH, 9982 }; 9983 9984 if (ifmgd->auth_data && 9985 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9986 sdata_info(sdata, 9987 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9988 req->bssid, req->reason_code, 9989 ieee80211_get_reason_code_string(req->reason_code)); 9990 9991 info.link_id = ifmgd->auth_data->link_id; 9992 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9993 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9994 IEEE80211_STYPE_DEAUTH, 9995 req->reason_code, tx, 9996 frame_buf); 9997 ieee80211_destroy_auth_data(sdata, false); 9998 ieee80211_report_disconnect(sdata, frame_buf, 9999 sizeof(frame_buf), true, 10000 req->reason_code, false); 10001 drv_mgd_complete_tx(sdata->local, sdata, &info); 10002 return 0; 10003 } 10004 10005 if (ifmgd->assoc_data && 10006 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 10007 sdata_info(sdata, 10008 "aborting association with %pM by local choice (Reason: %u=%s)\n", 10009 req->bssid, req->reason_code, 10010 ieee80211_get_reason_code_string(req->reason_code)); 10011 10012 info.link_id = ifmgd->assoc_data->assoc_link_id; 10013 drv_mgd_prepare_tx(sdata->local, sdata, &info); 10014 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 10015 IEEE80211_STYPE_DEAUTH, 10016 req->reason_code, tx, 10017 frame_buf); 10018 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 10019 ieee80211_report_disconnect(sdata, frame_buf, 10020 sizeof(frame_buf), true, 10021 req->reason_code, false); 10022 drv_mgd_complete_tx(sdata->local, sdata, &info); 10023 return 0; 10024 } 10025 10026 if (ifmgd->associated && 10027 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 10028 sdata_info(sdata, 10029 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 10030 req->bssid, req->reason_code, 10031 ieee80211_get_reason_code_string(req->reason_code)); 10032 10033 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 10034 req->reason_code, tx, frame_buf); 10035 ieee80211_report_disconnect(sdata, frame_buf, 10036 sizeof(frame_buf), true, 10037 req->reason_code, false); 10038 return 0; 10039 } 10040 10041 return -ENOTCONN; 10042 } 10043 10044 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 10045 struct cfg80211_disassoc_request *req) 10046 { 10047 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 10048 10049 if (!sdata->u.mgd.associated || 10050 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 10051 return -ENOTCONN; 10052 10053 sdata_info(sdata, 10054 "disassociating from %pM by local choice (Reason: %u=%s)\n", 10055 req->ap_addr, req->reason_code, 10056 ieee80211_get_reason_code_string(req->reason_code)); 10057 10058 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 10059 req->reason_code, !req->local_state_change, 10060 frame_buf); 10061 10062 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 10063 req->reason_code, false); 10064 10065 return 0; 10066 } 10067 10068 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 10069 { 10070 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10071 &link->u.mgd.request_smps_work); 10072 wiphy_work_cancel(link->sdata->local->hw.wiphy, 10073 &link->u.mgd.recalc_smps); 10074 wiphy_hrtimer_work_cancel(link->sdata->local->hw.wiphy, 10075 &link->u.mgd.csa.switch_work); 10076 } 10077 10078 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 10079 { 10080 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10081 10082 /* 10083 * Make sure some work items will not run after this, 10084 * they will not do anything but might not have been 10085 * cancelled when disconnecting. 10086 */ 10087 wiphy_work_cancel(sdata->local->hw.wiphy, 10088 &ifmgd->monitor_work); 10089 wiphy_work_cancel(sdata->local->hw.wiphy, 10090 &ifmgd->beacon_connection_loss_work); 10091 wiphy_work_cancel(sdata->local->hw.wiphy, 10092 &ifmgd->csa_connection_drop_work); 10093 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 10094 &ifmgd->tdls_peer_del_work); 10095 10096 if (ifmgd->assoc_data) 10097 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 10098 if (ifmgd->auth_data) 10099 ieee80211_destroy_auth_data(sdata, false); 10100 spin_lock_bh(&ifmgd->teardown_lock); 10101 if (ifmgd->teardown_skb) { 10102 kfree_skb(ifmgd->teardown_skb); 10103 ifmgd->teardown_skb = NULL; 10104 ifmgd->orig_teardown_skb = NULL; 10105 } 10106 kfree(ifmgd->assoc_req_ies); 10107 ifmgd->assoc_req_ies = NULL; 10108 ifmgd->assoc_req_ies_len = 0; 10109 spin_unlock_bh(&ifmgd->teardown_lock); 10110 timer_delete_sync(&ifmgd->timer); 10111 } 10112 10113 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 10114 enum nl80211_cqm_rssi_threshold_event rssi_event, 10115 s32 rssi_level, 10116 gfp_t gfp) 10117 { 10118 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10119 10120 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10121 10122 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10123 } 10124 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10125 10126 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10127 { 10128 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10129 10130 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10131 10132 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10133 } 10134 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10135 10136 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10137 int rssi_min_thold, 10138 int rssi_max_thold) 10139 { 10140 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10141 10142 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10143 return; 10144 10145 /* 10146 * Scale up threshold values before storing it, as the RSSI averaging 10147 * algorithm uses a scaled up value as well. Change this scaling 10148 * factor if the RSSI averaging algorithm changes. 10149 */ 10150 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10151 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10152 } 10153 10154 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10155 int rssi_min_thold, 10156 int rssi_max_thold) 10157 { 10158 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10159 10160 WARN_ON(rssi_min_thold == rssi_max_thold || 10161 rssi_min_thold > rssi_max_thold); 10162 10163 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10164 rssi_max_thold); 10165 } 10166 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10167 10168 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10169 { 10170 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10171 10172 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10173 } 10174 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10175 10176 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10177 struct ieee80211_mgmt *mgmt, size_t len) 10178 { 10179 struct ieee80211_local *local = sdata->local; 10180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10181 struct ieee80211_mgd_assoc_data *add_links_data = 10182 ifmgd->reconf.add_links_data; 10183 struct sta_info *sta; 10184 struct cfg80211_mlo_reconf_done_data done_data = {}; 10185 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10186 sdata->u.mgd.reconf.removed_links; 10187 u16 link_mask, valid_links; 10188 unsigned int link_id; 10189 size_t orig_len = len; 10190 u8 i, group_key_data_len; 10191 u8 *pos; 10192 10193 if (!ieee80211_vif_is_mld(&sdata->vif) || 10194 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10195 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10196 sdata->u.mgd.reconf.dialog_token || 10197 !sta_changed_links) 10198 return; 10199 10200 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10201 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10202 10203 /* each status duple is 3 octets */ 10204 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10205 sdata_info(sdata, 10206 "mlo: reconf: unexpected len=%zu, count=%u\n", 10207 len, mgmt->u.action.u.ml_reconf_resp.count); 10208 goto disconnect; 10209 } 10210 10211 link_mask = sta_changed_links; 10212 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10213 u16 status = get_unaligned_le16(pos + 1); 10214 10215 link_id = *pos; 10216 10217 if (!(link_mask & BIT(link_id))) { 10218 sdata_info(sdata, 10219 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10220 link_id, sta_changed_links); 10221 goto disconnect; 10222 } 10223 10224 /* clear the corresponding link, to detect the case that 10225 * the same link was included more than one time 10226 */ 10227 link_mask &= ~BIT(link_id); 10228 10229 /* Handle failure to remove links here. Failure to remove added 10230 * links will be done later in the flow. 10231 */ 10232 if (status != WLAN_STATUS_SUCCESS) { 10233 sdata_info(sdata, 10234 "mlo: reconf: failed on link=%u, status=%u\n", 10235 link_id, status); 10236 10237 /* The AP MLD failed to remove a link that was already 10238 * removed locally. As this is not expected behavior, 10239 * disconnect 10240 */ 10241 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10242 goto disconnect; 10243 10244 /* The AP MLD failed to add a link. Remove it from the 10245 * added links. 10246 */ 10247 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10248 } 10249 10250 pos += 3; 10251 len -= 3; 10252 } 10253 10254 if (link_mask) { 10255 sdata_info(sdata, 10256 "mlo: reconf: no response for links=0x%x\n", 10257 link_mask); 10258 goto disconnect; 10259 } 10260 10261 if (!sdata->u.mgd.reconf.added_links) 10262 goto out; 10263 10264 if (len < 1 || len < 1 + *pos) { 10265 sdata_info(sdata, 10266 "mlo: reconf: invalid group key data length"); 10267 goto disconnect; 10268 } 10269 10270 /* The Group Key Data field must be present when links are added. This 10271 * field should be processed by userland. 10272 */ 10273 group_key_data_len = *pos++; 10274 10275 pos += group_key_data_len; 10276 len -= group_key_data_len + 1; 10277 10278 /* Process the information for the added links */ 10279 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10280 if (WARN_ON(!sta)) 10281 goto disconnect; 10282 10283 valid_links = sdata->vif.valid_links; 10284 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10285 if (!add_links_data->link[link_id].bss || 10286 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10287 continue; 10288 10289 valid_links |= BIT(link_id); 10290 if (ieee80211_sta_allocate_link(sta, link_id)) 10291 goto disconnect; 10292 } 10293 10294 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10295 link_mask = 0; 10296 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10297 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10298 struct ieee80211_link_data *link; 10299 struct link_sta_info *link_sta; 10300 u64 changed = 0; 10301 10302 if (!cbss) 10303 continue; 10304 10305 link = sdata_dereference(sdata->link[link_id], sdata); 10306 if (WARN_ON(!link)) 10307 goto disconnect; 10308 10309 link_info(link, 10310 "mlo: reconf: local address %pM, AP link address %pM\n", 10311 add_links_data->link[link_id].addr, 10312 add_links_data->link[link_id].bss->bssid); 10313 10314 link_sta = rcu_dereference_protected(sta->link[link_id], 10315 lockdep_is_held(&local->hw.wiphy->mtx)); 10316 if (WARN_ON(!link_sta)) 10317 goto disconnect; 10318 10319 if (!link->u.mgd.have_beacon) { 10320 const struct cfg80211_bss_ies *ies; 10321 10322 rcu_read_lock(); 10323 ies = rcu_dereference(cbss->beacon_ies); 10324 if (ies) 10325 link->u.mgd.have_beacon = true; 10326 else 10327 ies = rcu_dereference(cbss->ies); 10328 ieee80211_get_dtim(ies, 10329 &link->conf->sync_dtim_count, 10330 &link->u.mgd.dtim_period); 10331 link->conf->beacon_int = cbss->beacon_interval; 10332 rcu_read_unlock(); 10333 } 10334 10335 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10336 10337 link->u.mgd.conn = add_links_data->link[link_id].conn; 10338 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10339 true, &link->u.mgd.conn, 10340 sdata->u.mgd.userspace_selectors)) { 10341 link_info(link, "mlo: reconf: prep_channel failed\n"); 10342 goto disconnect; 10343 } 10344 10345 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10346 add_links_data->link[link_id].bss)) 10347 goto disconnect; 10348 10349 if (!ieee80211_assoc_config_link(link, link_sta, 10350 add_links_data->link[link_id].bss, 10351 mgmt, pos, len, 10352 &changed)) 10353 goto disconnect; 10354 10355 /* The AP MLD indicated success for this link, but the station 10356 * profile status indicated otherwise. Since there is an 10357 * inconsistency in the ML reconfiguration response, disconnect 10358 */ 10359 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10360 goto disconnect; 10361 10362 ieee80211_sta_init_nss(link_sta); 10363 if (ieee80211_sta_activate_link(sta, link_id)) 10364 goto disconnect; 10365 10366 changed |= ieee80211_link_set_associated(link, cbss); 10367 ieee80211_link_info_change_notify(sdata, link, changed); 10368 10369 ieee80211_recalc_smps(sdata, link); 10370 link_mask |= BIT(link_id); 10371 } 10372 10373 sdata_info(sdata, 10374 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10375 valid_links, link_mask); 10376 10377 /* links might have changed due to rejected ones, set them again */ 10378 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10379 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10380 10381 ieee80211_recalc_ps(local); 10382 ieee80211_recalc_ps_vif(sdata); 10383 10384 done_data.buf = (const u8 *)mgmt; 10385 done_data.len = orig_len; 10386 done_data.added_links = link_mask; 10387 10388 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10389 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10390 done_data.links[link_id].addr = 10391 add_links_data->link[link_id].addr; 10392 } 10393 10394 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10395 kfree(sdata->u.mgd.reconf.add_links_data); 10396 sdata->u.mgd.reconf.add_links_data = NULL; 10397 out: 10398 ieee80211_ml_reconf_reset(sdata); 10399 return; 10400 10401 disconnect: 10402 __ieee80211_disconnect(sdata); 10403 } 10404 10405 static struct sk_buff * 10406 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10407 struct ieee80211_mgd_assoc_data *add_links_data, 10408 u16 removed_links, __le16 ext_mld_capa_ops) 10409 { 10410 struct ieee80211_local *local = sdata->local; 10411 struct ieee80211_mgmt *mgmt; 10412 struct ieee80211_multi_link_elem *ml_elem; 10413 struct ieee80211_mle_basic_common_info *common; 10414 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10415 struct sk_buff *skb; 10416 size_t size; 10417 unsigned int link_id; 10418 __le16 eml_capa = 0, mld_capa_ops = 0; 10419 struct ieee80211_tx_info *info; 10420 u8 common_size, var_common_size; 10421 u8 *ml_elem_len; 10422 u16 capab = 0; 10423 10424 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10425 10426 /* Consider the maximal length of the reconfiguration ML element */ 10427 size += sizeof(struct ieee80211_multi_link_elem); 10428 10429 /* The Basic ML element and the Reconfiguration ML element have the same 10430 * fixed common information fields in the context of ML reconfiguration 10431 * action frame. The AP MLD MAC address must always be present 10432 */ 10433 common_size = sizeof(*common); 10434 10435 /* when adding links, the MLD capabilities must be present */ 10436 var_common_size = 0; 10437 if (add_links_data) { 10438 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10439 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10440 ieee80211_vif_type_p2p(&sdata->vif)); 10441 10442 if (ift_ext_capa) { 10443 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10444 mld_capa_ops = 10445 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10446 } 10447 10448 /* MLD capabilities and operation */ 10449 var_common_size += 2; 10450 10451 /* EML capabilities */ 10452 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10453 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10454 var_common_size += 2; 10455 } 10456 10457 if (ext_mld_capa_ops) 10458 var_common_size += 2; 10459 10460 /* Add the common information length */ 10461 size += common_size + var_common_size; 10462 10463 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10464 struct cfg80211_bss *cbss; 10465 size_t elems_len; 10466 10467 if (removed_links & BIT(link_id)) { 10468 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10469 ETH_ALEN; 10470 continue; 10471 } 10472 10473 if (!add_links_data || !add_links_data->link[link_id].bss) 10474 continue; 10475 10476 elems_len = add_links_data->link[link_id].elems_len; 10477 cbss = add_links_data->link[link_id].bss; 10478 10479 /* should be the same across all BSSes */ 10480 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10481 capab |= WLAN_CAPABILITY_PRIVACY; 10482 10483 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10484 ETH_ALEN; 10485 10486 /* WMM */ 10487 size += 9; 10488 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10489 elems_len); 10490 } 10491 10492 skb = alloc_skb(size, GFP_KERNEL); 10493 if (!skb) 10494 return NULL; 10495 10496 skb_reserve(skb, local->hw.extra_tx_headroom); 10497 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10498 u.action.u.ml_reconf_req)); 10499 10500 /* Add the MAC header */ 10501 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10502 IEEE80211_STYPE_ACTION); 10503 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10504 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10505 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10506 10507 /* Add the action frame fixed fields */ 10508 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10509 mgmt->u.action.u.ml_reconf_req.action_code = 10510 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10511 10512 /* allocate a dialog token and store it */ 10513 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10514 mgmt->u.action.u.ml_reconf_req.dialog_token = 10515 sdata->u.mgd.reconf.dialog_token; 10516 10517 /* Add the ML reconfiguration element and the common information */ 10518 skb_put_u8(skb, WLAN_EID_EXTENSION); 10519 ml_elem_len = skb_put(skb, 1); 10520 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10521 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10522 ml_elem->control = 10523 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10524 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10525 common = skb_put(skb, common_size); 10526 common->len = common_size + var_common_size; 10527 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10528 10529 if (add_links_data) { 10530 if (eml_capa & 10531 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10532 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10533 ml_elem->control |= 10534 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10535 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10536 } 10537 10538 ml_elem->control |= 10539 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10540 10541 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10542 } 10543 10544 if (ext_mld_capa_ops) { 10545 ml_elem->control |= 10546 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10547 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10548 } 10549 10550 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10551 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10552 10553 /* Add the per station profile */ 10554 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10555 u8 *subelem_len = NULL; 10556 u16 ctrl; 10557 const u8 *addr; 10558 10559 /* Skip links that are not changing */ 10560 if (!(removed_links & BIT(link_id)) && 10561 (!add_links_data || !add_links_data->link[link_id].bss)) 10562 continue; 10563 10564 ctrl = link_id | 10565 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10566 10567 if (removed_links & BIT(link_id)) { 10568 struct ieee80211_bss_conf *conf = 10569 sdata_dereference(sdata->vif.link_conf[link_id], 10570 sdata); 10571 if (!conf) 10572 continue; 10573 10574 addr = conf->addr; 10575 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10576 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10577 } else { 10578 addr = add_links_data->link[link_id].addr; 10579 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10580 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10581 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10582 } 10583 10584 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10585 subelem_len = skb_put(skb, 1); 10586 10587 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10588 skb_put_u8(skb, 1 + ETH_ALEN); 10589 skb_put_data(skb, addr, ETH_ALEN); 10590 10591 if (!(removed_links & BIT(link_id))) { 10592 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10593 size_t extra_used; 10594 void *capab_pos; 10595 u8 qos_info; 10596 10597 capab_pos = skb_put(skb, 2); 10598 10599 extra_used = 10600 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10601 add_links_data->link[link_id].elems, 10602 add_links_data->link[link_id].elems_len, 10603 link_id, NULL, 10604 link_present_elems, 10605 add_links_data); 10606 10607 if (add_links_data->link[link_id].elems) 10608 skb_put_data(skb, 10609 add_links_data->link[link_id].elems + 10610 extra_used, 10611 add_links_data->link[link_id].elems_len - 10612 extra_used); 10613 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10614 qos_info = sdata->u.mgd.uapsd_queues; 10615 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10616 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10617 } else { 10618 qos_info = 0; 10619 } 10620 10621 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10622 put_unaligned_le16(capab, capab_pos); 10623 } 10624 10625 ieee80211_fragment_element(skb, subelem_len, 10626 IEEE80211_MLE_SUBELEM_FRAGMENT); 10627 } 10628 10629 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10630 10631 info = IEEE80211_SKB_CB(skb); 10632 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10633 10634 return skb; 10635 } 10636 10637 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10638 struct cfg80211_ml_reconf_req *req) 10639 { 10640 struct ieee80211_local *local = sdata->local; 10641 struct ieee80211_mgd_assoc_data *data = NULL; 10642 struct sta_info *sta; 10643 struct sk_buff *skb; 10644 u16 added_links, new_valid_links; 10645 int link_id, err; 10646 10647 if (!ieee80211_vif_is_mld(&sdata->vif) || 10648 !(sdata->vif.cfg.mld_capa_op & 10649 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10650 return -EINVAL; 10651 10652 /* No support for concurrent ML reconfiguration operation */ 10653 if (sdata->u.mgd.reconf.added_links || 10654 sdata->u.mgd.reconf.removed_links) 10655 return -EBUSY; 10656 10657 added_links = 0; 10658 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10659 if (!req->add_links[link_id].bss) 10660 continue; 10661 10662 added_links |= BIT(link_id); 10663 } 10664 10665 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10666 if (WARN_ON(!sta)) 10667 return -ENOLINK; 10668 10669 /* Adding links to the set of valid link is done only after a successful 10670 * ML reconfiguration frame exchange. Here prepare the data for the ML 10671 * reconfiguration frame construction and allocate the required 10672 * resources 10673 */ 10674 if (added_links) { 10675 bool uapsd_supported; 10676 10677 data = kzalloc(sizeof(*data), GFP_KERNEL); 10678 if (!data) 10679 return -ENOMEM; 10680 10681 data->assoc_link_id = -1; 10682 data->wmm = true; 10683 10684 uapsd_supported = true; 10685 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10686 link_id++) { 10687 struct ieee80211_supported_band *sband; 10688 struct cfg80211_bss *link_cbss = 10689 req->add_links[link_id].bss; 10690 struct ieee80211_bss *bss; 10691 10692 if (!link_cbss) 10693 continue; 10694 10695 bss = (void *)link_cbss->priv; 10696 10697 if (!bss->wmm_used) { 10698 err = -EINVAL; 10699 goto err_free; 10700 } 10701 10702 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10703 err = -EINVAL; 10704 goto err_free; 10705 } 10706 10707 eth_random_addr(data->link[link_id].addr); 10708 data->link[link_id].conn = 10709 ieee80211_conn_settings_unlimited; 10710 sband = 10711 local->hw.wiphy->bands[link_cbss->channel->band]; 10712 10713 ieee80211_determine_our_sta_mode(sdata, sband, 10714 NULL, true, link_id, 10715 &data->link[link_id].conn); 10716 10717 data->link[link_id].bss = link_cbss; 10718 data->link[link_id].disabled = 10719 req->add_links[link_id].disabled; 10720 data->link[link_id].elems = 10721 (u8 *)req->add_links[link_id].elems; 10722 data->link[link_id].elems_len = 10723 req->add_links[link_id].elems_len; 10724 10725 if (!bss->uapsd_supported) 10726 uapsd_supported = false; 10727 10728 if (data->link[link_id].conn.mode < 10729 IEEE80211_CONN_MODE_EHT) { 10730 err = -EINVAL; 10731 goto err_free; 10732 } 10733 10734 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10735 link_id); 10736 if (err) { 10737 err = -EINVAL; 10738 goto err_free; 10739 } 10740 } 10741 10742 /* Require U-APSD support if we enabled it */ 10743 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10744 !uapsd_supported) { 10745 err = -EINVAL; 10746 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10747 goto err_free; 10748 } 10749 10750 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10751 link_id++) { 10752 if (!data->link[link_id].bss) 10753 continue; 10754 10755 /* only used to verify the mode, nothing is allocated */ 10756 err = ieee80211_prep_channel(sdata, NULL, link_id, 10757 data->link[link_id].bss, 10758 true, 10759 &data->link[link_id].conn, 10760 sdata->u.mgd.userspace_selectors); 10761 if (err) 10762 goto err_free; 10763 } 10764 } 10765 10766 /* link removal is done before the ML reconfiguration frame exchange so 10767 * that these links will not be used between their removal by the AP MLD 10768 * and before the station got the ML reconfiguration response. Based on 10769 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10770 * link removal request. 10771 */ 10772 if (req->rem_links) { 10773 u16 new_active_links = 10774 sdata->vif.active_links & ~req->rem_links; 10775 10776 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10777 10778 /* Should not be left with no valid links to perform the 10779 * ML reconfiguration 10780 */ 10781 if (!new_valid_links || 10782 !(new_valid_links & ~sdata->vif.dormant_links)) { 10783 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10784 err = -EINVAL; 10785 goto err_free; 10786 } 10787 10788 if (new_active_links != sdata->vif.active_links) { 10789 if (!new_active_links) 10790 new_active_links = 10791 BIT(__ffs(new_valid_links & 10792 ~sdata->vif.dormant_links)); 10793 10794 err = ieee80211_set_active_links(&sdata->vif, 10795 new_active_links); 10796 if (err) { 10797 sdata_info(sdata, 10798 "mlo: reconf: failed set active links\n"); 10799 goto err_free; 10800 } 10801 } 10802 } 10803 10804 /* Build the SKB before the link removal as the construction of the 10805 * station info for removed links requires the local address. 10806 * Invalidate the removed links, so that the transmission of the ML 10807 * reconfiguration request frame would not be done using them, as the AP 10808 * is expected to send the ML reconfiguration response frame on the link 10809 * on which the request was received. 10810 */ 10811 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10812 cpu_to_le16(req->ext_mld_capa_ops)); 10813 if (!skb) { 10814 err = -ENOMEM; 10815 goto err_free; 10816 } 10817 10818 if (req->rem_links) { 10819 u16 new_dormant_links = 10820 sdata->vif.dormant_links & ~req->rem_links; 10821 10822 err = ieee80211_vif_set_links(sdata, new_valid_links, 10823 new_dormant_links); 10824 if (err) { 10825 sdata_info(sdata, 10826 "mlo: reconf: failed set valid links\n"); 10827 kfree_skb(skb); 10828 goto err_free; 10829 } 10830 10831 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10832 link_id++) { 10833 if (!(req->rem_links & BIT(link_id))) 10834 continue; 10835 10836 ieee80211_sta_remove_link(sta, link_id); 10837 } 10838 10839 /* notify the driver and upper layers */ 10840 ieee80211_vif_cfg_change_notify(sdata, 10841 BSS_CHANGED_MLD_VALID_LINKS); 10842 cfg80211_links_removed(sdata->dev, req->rem_links); 10843 } 10844 10845 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10846 added_links, req->rem_links); 10847 10848 ieee80211_tx_skb(sdata, skb); 10849 10850 sdata->u.mgd.reconf.added_links = added_links; 10851 sdata->u.mgd.reconf.add_links_data = data; 10852 sdata->u.mgd.reconf.removed_links = req->rem_links; 10853 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10854 &sdata->u.mgd.reconf.wk, 10855 IEEE80211_ASSOC_TIMEOUT_SHORT); 10856 return 0; 10857 10858 err_free: 10859 kfree(data); 10860 return err; 10861 } 10862 10863 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10864 { 10865 unsigned long valid_links = sdata->vif.valid_links; 10866 u8 link_id; 10867 10868 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10869 10870 if (!ieee80211_vif_is_mld(&sdata->vif)) 10871 return false; 10872 10873 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10874 struct ieee80211_bss_conf *bss_conf = 10875 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10876 10877 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10878 return false; 10879 } 10880 10881 return true; 10882 } 10883 10884 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10885 { 10886 struct ieee80211_local *local = sdata->local; 10887 struct ieee80211_mgmt *mgmt; 10888 struct sk_buff *skb; 10889 int frame_len = offsetofend(struct ieee80211_mgmt, 10890 u.action.u.epcs) + (enable ? 1 : 0); 10891 10892 if (!ieee80211_mgd_epcs_supp(sdata)) 10893 return -EINVAL; 10894 10895 if (sdata->u.mgd.epcs.enabled == enable && 10896 !sdata->u.mgd.epcs.dialog_token) 10897 return 0; 10898 10899 /* Do not allow enabling EPCS if the AP didn't respond yet. 10900 * However, allow disabling EPCS in such a case. 10901 */ 10902 if (sdata->u.mgd.epcs.dialog_token && enable) 10903 return -EALREADY; 10904 10905 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10906 if (!skb) 10907 return -ENOBUFS; 10908 10909 skb_reserve(skb, local->hw.extra_tx_headroom); 10910 mgmt = skb_put_zero(skb, frame_len); 10911 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10912 IEEE80211_STYPE_ACTION); 10913 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10914 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10915 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10916 10917 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10918 if (enable) { 10919 u8 *pos = mgmt->u.action.u.epcs.variable; 10920 10921 mgmt->u.action.u.epcs.action_code = 10922 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10923 10924 *pos = ++sdata->u.mgd.dialog_token_alloc; 10925 sdata->u.mgd.epcs.dialog_token = *pos; 10926 } else { 10927 mgmt->u.action.u.epcs.action_code = 10928 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10929 10930 ieee80211_epcs_teardown(sdata); 10931 ieee80211_epcs_changed(sdata, false); 10932 } 10933 10934 ieee80211_tx_skb(sdata, skb); 10935 return 0; 10936 } 10937 10938 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10939 struct ieee802_11_elems *elems) 10940 { 10941 const struct element *sub; 10942 size_t scratch_len = elems->ml_epcs_len; 10943 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10944 10945 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10946 10947 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10948 return; 10949 10950 if (WARN_ON(!scratch)) 10951 return; 10952 10953 /* Directly parse the sub elements as the common information doesn't 10954 * hold any useful information. 10955 */ 10956 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10957 elems->ml_epcs_len) { 10958 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10959 struct ieee80211_link_data *link; 10960 u8 *pos = (void *)sub->data; 10961 u16 control; 10962 ssize_t len; 10963 u8 link_id; 10964 10965 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10966 continue; 10967 10968 if (sub->datalen < sizeof(control)) 10969 break; 10970 10971 control = get_unaligned_le16(pos); 10972 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10973 10974 link = sdata_dereference(sdata->link[link_id], sdata); 10975 if (!link) 10976 continue; 10977 10978 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10979 elems->ml_epcs_len, 10980 scratch, scratch_len, 10981 IEEE80211_MLE_SUBELEM_FRAGMENT); 10982 if (len < (ssize_t)sizeof(control)) 10983 continue; 10984 10985 pos = scratch + sizeof(control); 10986 len -= sizeof(control); 10987 10988 link_elems = ieee802_11_parse_elems(pos, len, 10989 IEEE80211_FTYPE_MGMT | 10990 IEEE80211_STYPE_ACTION, 10991 NULL); 10992 if (!link_elems) 10993 continue; 10994 10995 if (ieee80211_sta_wmm_params(sdata->local, link, 10996 link_elems->wmm_param, 10997 link_elems->wmm_param_len, 10998 link_elems->mu_edca_param_set)) 10999 ieee80211_link_info_change_notify(sdata, link, 11000 BSS_CHANGED_QOS); 11001 } 11002 } 11003 11004 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 11005 struct ieee80211_mgmt *mgmt, size_t len) 11006 { 11007 struct ieee802_11_elems *elems __free(kfree) = NULL; 11008 size_t ies_len; 11009 u16 status_code; 11010 u8 *pos, dialog_token; 11011 11012 if (!ieee80211_mgd_epcs_supp(sdata)) 11013 return; 11014 11015 /* Handle dialog token and status code */ 11016 pos = mgmt->u.action.u.epcs.variable; 11017 dialog_token = *pos; 11018 status_code = get_unaligned_le16(pos + 1); 11019 11020 /* An EPCS enable response with dialog token == 0 is an unsolicited 11021 * notification from the AP MLD. In such a case, EPCS should already be 11022 * enabled and status must be success 11023 */ 11024 if (!dialog_token && 11025 (!sdata->u.mgd.epcs.enabled || 11026 status_code != WLAN_STATUS_SUCCESS)) 11027 return; 11028 11029 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 11030 return; 11031 11032 sdata->u.mgd.epcs.dialog_token = 0; 11033 11034 if (status_code != WLAN_STATUS_SUCCESS) 11035 return; 11036 11037 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11038 ies_len = len - offsetof(struct ieee80211_mgmt, 11039 u.action.u.epcs.variable) - 11040 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 11041 11042 elems = ieee802_11_parse_elems(pos, ies_len, 11043 IEEE80211_FTYPE_MGMT | 11044 IEEE80211_STYPE_ACTION, 11045 NULL); 11046 if (!elems) 11047 return; 11048 11049 ieee80211_ml_epcs(sdata, elems); 11050 ieee80211_epcs_changed(sdata, true); 11051 } 11052 11053 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 11054 struct ieee80211_mgmt *mgmt, size_t len) 11055 { 11056 if (!ieee80211_vif_is_mld(&sdata->vif) || 11057 !sdata->u.mgd.epcs.enabled) 11058 return; 11059 11060 ieee80211_epcs_teardown(sdata); 11061 ieee80211_epcs_changed(sdata, false); 11062 } 11063