1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2025 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 172 ignore_ht_channel_mismatch = false; 173 174 *chandef = (struct cfg80211_chan_def) { 175 .chan = channel, 176 .width = NL80211_CHAN_WIDTH_20_NOHT, 177 .center_freq1 = channel->center_freq, 178 .freq1_offset = channel->freq_offset, 179 }; 180 181 /* get special S1G case out of the way */ 182 if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 184 sdata_info(sdata, 185 "Missing S1G Operation Element? Trying operating == primary\n"); 186 chandef->width = ieee80211_s1g_channel_width(channel); 187 } 188 189 return IEEE80211_CONN_MODE_S1G; 190 } 191 192 /* get special 6 GHz case out of the way */ 193 if (sband->band == NL80211_BAND_6GHZ) { 194 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 195 196 /* this is an error */ 197 if (conn->mode < IEEE80211_CONN_MODE_HE) 198 return IEEE80211_CONN_MODE_LEGACY; 199 200 if (!elems->he_6ghz_capa || !elems->he_cap) { 201 sdata_info(sdata, 202 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 203 return IEEE80211_CONN_MODE_LEGACY; 204 } 205 206 if (!eht_oper || !elems->eht_cap) { 207 eht_oper = NULL; 208 mode = IEEE80211_CONN_MODE_HE; 209 } 210 211 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 212 eht_oper, chandef)) { 213 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 214 return IEEE80211_CONN_MODE_LEGACY; 215 } 216 217 return mode; 218 } 219 220 /* now we have the progression HT, VHT, ... */ 221 if (conn->mode < IEEE80211_CONN_MODE_HT) 222 return IEEE80211_CONN_MODE_LEGACY; 223 224 if (!ht_oper || !elems->ht_cap_elem) 225 return IEEE80211_CONN_MODE_LEGACY; 226 227 chandef->width = NL80211_CHAN_WIDTH_20; 228 229 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 230 channel->band); 231 /* check that channel matches the right operating channel */ 232 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 233 /* 234 * It's possible that some APs are confused here; 235 * Netgear WNDR3700 sometimes reports 4 higher than 236 * the actual channel in association responses, but 237 * since we look at probe response/beacon data here 238 * it should be OK. 239 */ 240 sdata_info(sdata, 241 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 242 channel->center_freq, ht_cfreq, 243 ht_oper->primary_chan, channel->band); 244 return IEEE80211_CONN_MODE_LEGACY; 245 } 246 247 ieee80211_chandef_ht_oper(ht_oper, chandef); 248 249 if (conn->mode < IEEE80211_CONN_MODE_VHT) 250 return IEEE80211_CONN_MODE_HT; 251 252 vht_chandef = *chandef; 253 254 /* 255 * having he_cap/he_oper parsed out implies we're at 256 * least operating as HE STA 257 */ 258 if (elems->he_cap && he_oper && 259 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 260 struct ieee80211_vht_operation he_oper_vht_cap; 261 262 /* 263 * Set only first 3 bytes (other 2 aren't used in 264 * ieee80211_chandef_vht_oper() anyway) 265 */ 266 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 267 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 268 269 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 270 &he_oper_vht_cap, ht_oper, 271 &vht_chandef)) { 272 sdata_info(sdata, 273 "HE AP VHT information is invalid, disabling HE\n"); 274 /* this will cause us to re-parse as VHT STA */ 275 return IEEE80211_CONN_MODE_VHT; 276 } 277 } else if (!vht_oper || !elems->vht_cap_elem) { 278 if (sband->band == NL80211_BAND_5GHZ) { 279 sdata_info(sdata, 280 "VHT information is missing, disabling VHT\n"); 281 return IEEE80211_CONN_MODE_HT; 282 } 283 no_vht = true; 284 } else if (sband->band == NL80211_BAND_2GHZ) { 285 no_vht = true; 286 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 287 vht_cap_info, 288 vht_oper, ht_oper, 289 &vht_chandef)) { 290 sdata_info(sdata, 291 "AP VHT information is invalid, disabling VHT\n"); 292 return IEEE80211_CONN_MODE_HT; 293 } 294 295 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 296 sdata_info(sdata, 297 "AP VHT information doesn't match HT, disabling VHT\n"); 298 return IEEE80211_CONN_MODE_HT; 299 } 300 301 *chandef = vht_chandef; 302 303 /* stick to current max mode if we or the AP don't have HE */ 304 if (conn->mode < IEEE80211_CONN_MODE_HE || 305 !elems->he_operation || !elems->he_cap) { 306 if (no_vht) 307 return IEEE80211_CONN_MODE_HT; 308 return IEEE80211_CONN_MODE_VHT; 309 } 310 311 /* stick to HE if we or the AP don't have EHT */ 312 if (conn->mode < IEEE80211_CONN_MODE_EHT || 313 !eht_oper || !elems->eht_cap) 314 return IEEE80211_CONN_MODE_HE; 315 316 /* 317 * handle the case that the EHT operation indicates that it holds EHT 318 * operation information (in case that the channel width differs from 319 * the channel width reported in HT/VHT/HE). 320 */ 321 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 322 struct cfg80211_chan_def eht_chandef = *chandef; 323 324 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 325 &eht_chandef); 326 327 eht_chandef.punctured = 328 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 329 330 if (!cfg80211_chandef_valid(&eht_chandef)) { 331 sdata_info(sdata, 332 "AP EHT information is invalid, disabling EHT\n"); 333 return IEEE80211_CONN_MODE_HE; 334 } 335 336 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 337 sdata_info(sdata, 338 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 339 return IEEE80211_CONN_MODE_HE; 340 } 341 342 *chandef = eht_chandef; 343 } 344 345 return IEEE80211_CONN_MODE_EHT; 346 } 347 348 static bool 349 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 350 struct ieee80211_supported_band *sband, 351 const struct ieee80211_ht_operation *ht_op) 352 { 353 struct ieee80211_sta_ht_cap sta_ht_cap; 354 int i; 355 356 if (sband->band == NL80211_BAND_6GHZ) 357 return true; 358 359 if (!ht_op) 360 return false; 361 362 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 363 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 364 365 /* 366 * P802.11REVme/D7.0 - 6.5.4.2.4 367 * ... 368 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 369 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 370 * in the HT Operation parameter that contains any unsupported MCSs, 371 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 372 * contain a ResultCode parameter that is not set to the value SUCCESS. 373 * ... 374 */ 375 376 /* Simply check that all basic rates are in the STA RX mask */ 377 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 378 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 379 ht_op->basic_set[i]) 380 return false; 381 } 382 383 return true; 384 } 385 386 static bool 387 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 388 int link_id, 389 struct ieee80211_supported_band *sband, 390 const struct ieee80211_vht_operation *vht_op) 391 { 392 struct ieee80211_sta_vht_cap sta_vht_cap; 393 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 394 int nss; 395 396 if (sband->band != NL80211_BAND_5GHZ) 397 return true; 398 399 if (!vht_op) 400 return false; 401 402 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 403 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 404 405 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 406 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 407 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 408 409 /* 410 * Many APs are incorrectly advertising an all-zero value here, 411 * which really means MCS 0-7 are required for 1-8 streams, but 412 * they don't really mean it that way. 413 * Some other APs are incorrectly advertising 3 spatial streams 414 * with MCS 0-7 are required, but don't really mean it that way 415 * and we'll connect only with HT, rather than even HE. 416 * As a result, unfortunately the VHT basic MCS/NSS set cannot 417 * be used at all, so check it only in strict mode. 418 */ 419 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 420 return true; 421 422 /* 423 * P802.11REVme/D7.0 - 6.5.4.2.4 424 * ... 425 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 426 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 427 * field in the VHT Operation parameter that contains any unsupported 428 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 429 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 430 * that is not set to the value SUCCESS. 431 * ... 432 */ 433 for (nss = 8; nss > 0; nss--) { 434 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 435 u8 sta_rx_val; 436 u8 sta_tx_val; 437 438 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 439 continue; 440 441 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 442 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 443 444 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 445 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 446 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 447 link_id_info(sdata, link_id, 448 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 449 nss, sta_rx_val, sta_tx_val, ap_op_val); 450 return false; 451 } 452 } 453 454 return true; 455 } 456 457 static bool 458 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 459 int link_id, 460 const struct ieee80211_he_cap_elem *he_cap, 461 const struct ieee80211_he_operation *he_op) 462 { 463 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 464 u16 mcs_80_map_tx, mcs_80_map_rx; 465 u16 ap_min_req_set; 466 int nss; 467 468 if (!he_cap) 469 return false; 470 471 /* mcs_nss is right after he_cap info */ 472 he_mcs_nss_supp = (void *)(he_cap + 1); 473 474 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 475 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 476 477 /* P802.11-REVme/D0.3 478 * 27.1.1 Introduction to the HE PHY 479 * ... 480 * An HE STA shall support the following features: 481 * ... 482 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 483 * supported channel widths for HE SU PPDUs 484 */ 485 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 486 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 487 link_id_info(sdata, link_id, 488 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 489 mcs_80_map_tx, mcs_80_map_rx); 490 return false; 491 } 492 493 if (!he_op) 494 return true; 495 496 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 497 498 /* 499 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 500 * zeroes, which is nonsense, and completely inconsistent with itself 501 * (it doesn't have 8 streams). Accept the settings in this case anyway. 502 */ 503 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 504 return true; 505 506 /* make sure the AP is consistent with itself 507 * 508 * P802.11-REVme/D0.3 509 * 26.17.1 Basic HE BSS operation 510 * 511 * A STA that is operating in an HE BSS shall be able to receive and 512 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 513 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 514 * MLME-START.request primitive and shall be able to receive at each of 515 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 516 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 517 * primitive 518 */ 519 for (nss = 8; nss > 0; nss--) { 520 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 521 u8 ap_rx_val; 522 u8 ap_tx_val; 523 524 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 525 continue; 526 527 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 528 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 529 530 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 531 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 532 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 533 link_id_info(sdata, link_id, 534 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 535 nss, ap_rx_val, ap_tx_val, ap_op_val); 536 return false; 537 } 538 } 539 540 return true; 541 } 542 543 static bool 544 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 545 struct ieee80211_supported_band *sband, 546 const struct ieee80211_he_operation *he_op) 547 { 548 const struct ieee80211_sta_he_cap *sta_he_cap = 549 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 550 u16 ap_min_req_set; 551 int i; 552 553 if (!sta_he_cap || !he_op) 554 return false; 555 556 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 557 558 /* 559 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 560 * zeroes, which is nonsense, and completely inconsistent with itself 561 * (it doesn't have 8 streams). Accept the settings in this case anyway. 562 */ 563 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 564 return true; 565 566 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 567 for (i = 0; i < 3; i++) { 568 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 569 &sta_he_cap->he_mcs_nss_supp; 570 u16 sta_mcs_map_rx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 572 u16 sta_mcs_map_tx = 573 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 574 u8 nss; 575 bool verified = true; 576 577 /* 578 * For each band there is a maximum of 8 spatial streams 579 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 580 * of 2 bits per NSS (1-8), with the values defined in enum 581 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 582 * capabilities aren't less than the AP's minimum requirements 583 * for this HE BSS per SS. 584 * It is enough to find one such band that meets the reqs. 585 */ 586 for (nss = 8; nss > 0; nss--) { 587 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 588 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 589 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 590 591 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 592 continue; 593 594 /* 595 * Make sure the HE AP doesn't require MCSs that aren't 596 * supported by the client as required by spec 597 * 598 * P802.11-REVme/D0.3 599 * 26.17.1 Basic HE BSS operation 600 * 601 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 602 * a BSS, unless it supports (i.e., is able to both transmit and 603 * receive using) all of the <HE-MCS, NSS> tuples in the basic 604 * HE-MCS and NSS set. 605 */ 606 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 607 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 608 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 609 verified = false; 610 break; 611 } 612 } 613 614 if (verified) 615 return true; 616 } 617 618 /* If here, STA doesn't meet AP's HE min requirements */ 619 return false; 620 } 621 622 static u8 623 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 624 const struct ieee80211_sta_eht_cap *sta_eht_cap, 625 unsigned int idx, int bw) 626 { 627 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 628 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 629 630 /* handle us being a 20 MHz-only EHT STA - with four values 631 * for MCS 0-7, 8-9, 10-11, 12-13. 632 */ 633 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 634 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 635 636 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 637 if (idx > 0) 638 idx--; 639 640 switch (bw) { 641 case 0: 642 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 643 case 1: 644 if (!(he_phy_cap0 & 645 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 646 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 647 return 0xff; /* pass check */ 648 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 649 case 2: 650 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 651 return 0xff; /* pass check */ 652 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 653 } 654 655 WARN_ON(1); 656 return 0; 657 } 658 659 static bool 660 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 661 struct ieee80211_supported_band *sband, 662 const struct ieee80211_eht_operation *eht_op) 663 { 664 const struct ieee80211_sta_he_cap *sta_he_cap = 665 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_sta_eht_cap *sta_eht_cap = 667 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 668 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 669 unsigned int i; 670 671 if (!sta_he_cap || !sta_eht_cap || !eht_op) 672 return false; 673 674 req = &eht_op->basic_mcs_nss; 675 676 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 677 u8 req_rx_nss, req_tx_nss; 678 unsigned int bw; 679 680 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_RX); 682 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 683 IEEE80211_EHT_MCS_NSS_TX); 684 685 for (bw = 0; bw < 3; bw++) { 686 u8 have, have_rx_nss, have_tx_nss; 687 688 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 689 sta_eht_cap, 690 i, bw); 691 have_rx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_RX); 693 have_tx_nss = u8_get_bits(have, 694 IEEE80211_EHT_MCS_NSS_TX); 695 696 if (req_rx_nss > have_rx_nss || 697 req_tx_nss > have_tx_nss) 698 return false; 699 } 700 } 701 702 return true; 703 } 704 705 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 706 const u8 *supp_rates, 707 unsigned int supp_rates_len, 708 const u8 *ext_supp_rates, 709 unsigned int ext_supp_rates_len, 710 u32 *rates, u32 *basic_rates, 711 unsigned long *unknown_rates_selectors, 712 bool *have_higher_than_11mbit, 713 int *min_rate, int *min_rate_index) 714 { 715 int i, j; 716 717 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 718 u8 supp_rate = i < supp_rates_len ? 719 supp_rates[i] : 720 ext_supp_rates[i - supp_rates_len]; 721 int rate = supp_rate & 0x7f; 722 bool is_basic = !!(supp_rate & 0x80); 723 724 if ((rate * 5) > 110 && have_higher_than_11mbit) 725 *have_higher_than_11mbit = true; 726 727 /* 728 * Skip membership selectors since they're not rates. 729 * 730 * Note: Even though the membership selector and the basic 731 * rate flag share the same bit, they are not exactly 732 * the same. 733 */ 734 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 735 if (unknown_rates_selectors) 736 set_bit(rate, unknown_rates_selectors); 737 continue; 738 } 739 740 for (j = 0; j < sband->n_bitrates; j++) { 741 struct ieee80211_rate *br; 742 int brate; 743 744 br = &sband->bitrates[j]; 745 746 brate = DIV_ROUND_UP(br->bitrate, 5); 747 if (brate == rate) { 748 if (rates) 749 *rates |= BIT(j); 750 if (is_basic && basic_rates) 751 *basic_rates |= BIT(j); 752 if (min_rate && (rate * 5) < *min_rate) { 753 *min_rate = rate * 5; 754 if (min_rate_index) 755 *min_rate_index = j; 756 } 757 break; 758 } 759 } 760 761 /* Handle an unknown entry as if it is an unknown selector */ 762 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 763 set_bit(rate, unknown_rates_selectors); 764 } 765 } 766 767 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 768 const struct cfg80211_chan_def *chandef, 769 u32 prohibited_flags) 770 { 771 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 772 chandef, prohibited_flags)) 773 return false; 774 775 if (chandef->punctured && 776 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 777 return false; 778 779 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 780 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 781 return false; 782 783 return true; 784 } 785 786 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 787 { 788 if (c->width == NL80211_CHAN_WIDTH_80P80) 789 return 4 + 4; 790 791 return cfg80211_chandef_get_width(c) / 20; 792 } 793 794 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 795 { 796 switch (c->width) { 797 case NL80211_CHAN_WIDTH_20: 798 case NL80211_CHAN_WIDTH_20_NOHT: 799 return 1; 800 case NL80211_CHAN_WIDTH_40: 801 return 2; 802 case NL80211_CHAN_WIDTH_80P80: 803 case NL80211_CHAN_WIDTH_80: 804 return 3; 805 case NL80211_CHAN_WIDTH_160: 806 return 4; 807 case NL80211_CHAN_WIDTH_320: 808 return 5; 809 default: 810 WARN_ON(1); 811 return 0; 812 } 813 } 814 815 VISIBLE_IF_MAC80211_KUNIT int 816 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 817 u8 n_partial_subchans) 818 { 819 int n = ieee80211_chandef_num_subchans(ap); 820 struct cfg80211_chan_def tmp = *ap; 821 int offset = 0; 822 823 /* 824 * Given a chandef (in this context, it's the AP's) and a number 825 * of subchannels that we want to look at ('n_partial_subchans'), 826 * calculate the offset in number of subchannels between the full 827 * and the subset with the desired width. 828 */ 829 830 /* same number of subchannels means no offset, obviously */ 831 if (n == n_partial_subchans) 832 return 0; 833 834 /* don't WARN - misconfigured APs could cause this if their N > width */ 835 if (n < n_partial_subchans) 836 return 0; 837 838 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 839 u32 prev = tmp.center_freq1; 840 841 ieee80211_chandef_downgrade(&tmp, NULL); 842 843 /* 844 * if center_freq moved up, half the original channels 845 * are gone now but were below, so increase offset 846 */ 847 if (prev < tmp.center_freq1) 848 offset += ieee80211_chandef_num_subchans(&tmp); 849 } 850 851 /* 852 * 80+80 with secondary 80 below primary - four subchannels for it 853 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 854 */ 855 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 856 ap->center_freq2 < ap->center_freq1) 857 offset += 4; 858 859 return offset; 860 } 861 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 862 863 VISIBLE_IF_MAC80211_KUNIT void 864 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 865 const struct cfg80211_chan_def *ap, 866 const struct cfg80211_chan_def *used) 867 { 868 u8 needed = ieee80211_chandef_num_subchans(used); 869 u8 have = ieee80211_chandef_num_subchans(ap); 870 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 871 u8 offset; 872 873 if (!psd->valid) 874 return; 875 876 /* if N is zero, all defaults were used, no point in rearranging */ 877 if (!psd->n) 878 goto out; 879 880 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 881 882 /* 883 * This assumes that 'N' is consistent with the HE channel, as 884 * it should be (otherwise the AP is broken). 885 * 886 * In psd->power we have values in the order 0..N, 0..K, where 887 * N+K should cover the entire channel per 'ap', but even if it 888 * doesn't then we've pre-filled 'unlimited' as defaults. 889 * 890 * But this is all the wrong order, we want to have them in the 891 * order of the 'used' channel. 892 * 893 * So for example, we could have a 320 MHz EHT AP, which has the 894 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 895 * seem to be considered for the TPE), as follows: 896 * 897 * EHT 320: | | | | | | | | | | | | | | | | | 898 * HE 80: | | | | | 899 * used 160: | | | | | | | | | 900 * 901 * N entries: |--|--|--|--| 902 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 903 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 904 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 905 * used chan: 0 1 2 3 4 5 6 7 906 * 907 * The idx in the power array ('power idx') is like this since it 908 * comes directly from the element's N and K entries in their 909 * element order, and those are this way for HE compatibility. 910 * 911 * Rearrange them as desired here, first by putting them into the 912 * 'full chan' order, and then selecting the necessary subset for 913 * the 'used chan'. 914 */ 915 916 /* first reorder according to AP channel */ 917 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 918 for (int i = 0; i < have; i++) { 919 if (i < offset) 920 tmp[i] = psd->power[i + psd->n]; 921 else if (i < offset + psd->n) 922 tmp[i] = psd->power[i - offset]; 923 else 924 tmp[i] = psd->power[i]; 925 } 926 927 /* 928 * and then select the subset for the used channel 929 * (set everything to defaults first in case a driver is confused) 930 */ 931 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 932 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 933 for (int i = 0; i < needed; i++) 934 psd->power[i] = tmp[offset + i]; 935 936 out: 937 /* limit, but don't lie if there are defaults in the data */ 938 if (needed < psd->count) 939 psd->count = needed; 940 } 941 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 942 943 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 944 const struct cfg80211_chan_def *ap, 945 const struct cfg80211_chan_def *used) 946 { 947 /* ignore this completely for narrow/invalid channels */ 948 if (!ieee80211_chandef_num_subchans(ap) || 949 !ieee80211_chandef_num_subchans(used)) { 950 ieee80211_clear_tpe(tpe); 951 return; 952 } 953 954 for (int i = 0; i < 2; i++) { 955 int needed_pwr_count; 956 957 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 958 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 959 960 /* limit this to the widths we actually need */ 961 needed_pwr_count = ieee80211_chandef_num_widths(used); 962 if (needed_pwr_count < tpe->max_local[i].count) 963 tpe->max_local[i].count = needed_pwr_count; 964 if (needed_pwr_count < tpe->max_reg_client[i].count) 965 tpe->max_reg_client[i].count = needed_pwr_count; 966 } 967 } 968 969 /* 970 * The AP part of the channel request is used to distinguish settings 971 * to the device used for wider bandwidth OFDMA. This is used in the 972 * channel context code to assign two channel contexts even if they're 973 * both for the same channel, if the AP bandwidths are incompatible. 974 * If not EHT (or driver override) then ap.chan == NULL indicates that 975 * there's no wider BW OFDMA used. 976 */ 977 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 978 struct ieee80211_chan_req *chanreq, 979 struct ieee80211_conn_settings *conn, 980 struct cfg80211_chan_def *ap_chandef) 981 { 982 chanreq->ap.chan = NULL; 983 984 if (conn->mode < IEEE80211_CONN_MODE_EHT) 985 return; 986 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 987 return; 988 989 chanreq->ap = *ap_chandef; 990 } 991 992 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 993 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 994 struct ieee80211_conn_settings *conn, 995 struct cfg80211_bss *cbss, int link_id, 996 struct ieee80211_chan_req *chanreq, 997 struct cfg80211_chan_def *ap_chandef, 998 unsigned long *userspace_selectors) 999 { 1000 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1001 struct ieee80211_bss *bss = (void *)cbss->priv; 1002 struct ieee80211_channel *channel = cbss->channel; 1003 struct ieee80211_elems_parse_params parse_params = { 1004 .link_id = -1, 1005 .from_ap = true, 1006 .start = ies->data, 1007 .len = ies->len, 1008 }; 1009 struct ieee802_11_elems *elems; 1010 struct ieee80211_supported_band *sband; 1011 enum ieee80211_conn_mode ap_mode; 1012 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1013 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1014 int ret; 1015 1016 again: 1017 parse_params.mode = conn->mode; 1018 elems = ieee802_11_parse_elems_full(&parse_params); 1019 if (!elems) 1020 return ERR_PTR(-ENOMEM); 1021 1022 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1023 elems, false, conn, ap_chandef); 1024 1025 /* this should be impossible since parsing depends on our mode */ 1026 if (WARN_ON(ap_mode > conn->mode)) { 1027 ret = -EINVAL; 1028 goto free; 1029 } 1030 1031 if (conn->mode != ap_mode) { 1032 conn->mode = ap_mode; 1033 kfree(elems); 1034 goto again; 1035 } 1036 1037 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1038 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1039 1040 sband = sdata->local->hw.wiphy->bands[channel->band]; 1041 1042 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1043 elems->ext_supp_rates, elems->ext_supp_rates_len, 1044 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1045 NULL); 1046 1047 switch (channel->band) { 1048 case NL80211_BAND_S1GHZ: 1049 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1050 ret = -EINVAL; 1051 goto free; 1052 } 1053 return elems; 1054 case NL80211_BAND_6GHZ: 1055 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1056 link_id_info(sdata, link_id, 1057 "Rejecting non-HE 6/7 GHz connection"); 1058 ret = -EINVAL; 1059 goto free; 1060 } 1061 break; 1062 default: 1063 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1064 ret = -EINVAL; 1065 goto free; 1066 } 1067 } 1068 1069 switch (ap_mode) { 1070 case IEEE80211_CONN_MODE_S1G: 1071 WARN_ON(1); 1072 ret = -EINVAL; 1073 goto free; 1074 case IEEE80211_CONN_MODE_LEGACY: 1075 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1076 break; 1077 case IEEE80211_CONN_MODE_HT: 1078 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1079 conn->bw_limit, 1080 IEEE80211_CONN_BW_LIMIT_40); 1081 break; 1082 case IEEE80211_CONN_MODE_VHT: 1083 case IEEE80211_CONN_MODE_HE: 1084 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1085 conn->bw_limit, 1086 IEEE80211_CONN_BW_LIMIT_160); 1087 break; 1088 case IEEE80211_CONN_MODE_EHT: 1089 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1090 conn->bw_limit, 1091 IEEE80211_CONN_BW_LIMIT_320); 1092 break; 1093 } 1094 1095 chanreq->oper = *ap_chandef; 1096 1097 bitmap_copy(sta_selectors, userspace_selectors, 128); 1098 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1099 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1100 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1101 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1102 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1103 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1104 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1105 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1106 1107 /* 1108 * We do not support EPD or GLK so never add them. 1109 * SAE_H2E is handled through userspace_selectors. 1110 */ 1111 1112 /* Check if we support all required features */ 1113 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1114 link_id_info(sdata, link_id, 1115 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1116 ret = -EINVAL; 1117 goto free; 1118 } 1119 1120 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1121 1122 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1123 IEEE80211_CHAN_DISABLED)) { 1124 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1125 ret = -EINVAL; 1126 goto free; 1127 } 1128 1129 ieee80211_chanreq_downgrade(chanreq, conn); 1130 } 1131 1132 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1133 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1134 IEEE80211_CHAN_NO_HE)) { 1135 conn->mode = IEEE80211_CONN_MODE_VHT; 1136 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1137 conn->bw_limit, 1138 IEEE80211_CONN_BW_LIMIT_160); 1139 } 1140 1141 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1142 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1143 IEEE80211_CHAN_NO_EHT)) { 1144 conn->mode = IEEE80211_CONN_MODE_HE; 1145 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1146 conn->bw_limit, 1147 IEEE80211_CONN_BW_LIMIT_160); 1148 } 1149 1150 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1151 link_id_info(sdata, link_id, 1152 "regulatory prevented using AP config, downgraded\n"); 1153 1154 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1155 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1156 elems->ht_operation)) { 1157 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1158 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1159 link_id_info(sdata, link_id, 1160 "required MCSes not supported, disabling HT\n"); 1161 } 1162 1163 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1164 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1165 elems->vht_operation)) { 1166 conn->mode = IEEE80211_CONN_MODE_HT; 1167 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1168 conn->bw_limit, 1169 IEEE80211_CONN_BW_LIMIT_40); 1170 link_id_info(sdata, link_id, 1171 "required MCSes not supported, disabling VHT\n"); 1172 } 1173 1174 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1175 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1176 (void *)elems->he_cap, 1177 elems->he_operation) || 1178 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1179 elems->he_operation))) { 1180 conn->mode = IEEE80211_CONN_MODE_VHT; 1181 link_id_info(sdata, link_id, 1182 "required MCSes not supported, disabling HE\n"); 1183 } 1184 1185 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1186 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1187 elems->eht_operation)) { 1188 conn->mode = IEEE80211_CONN_MODE_HE; 1189 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1190 conn->bw_limit, 1191 IEEE80211_CONN_BW_LIMIT_160); 1192 link_id_info(sdata, link_id, 1193 "required MCSes not supported, disabling EHT\n"); 1194 } 1195 1196 /* the mode can only decrease, so this must terminate */ 1197 if (ap_mode != conn->mode) { 1198 kfree(elems); 1199 goto again; 1200 } 1201 1202 mlme_link_id_dbg(sdata, link_id, 1203 "connecting with %s mode, max bandwidth %d MHz\n", 1204 ieee80211_conn_mode_str(conn->mode), 1205 20 * (1 << conn->bw_limit)); 1206 1207 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1208 ret = -EINVAL; 1209 goto free; 1210 } 1211 1212 return elems; 1213 free: 1214 kfree(elems); 1215 return ERR_PTR(ret); 1216 } 1217 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1218 1219 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1220 struct ieee802_11_elems *elems, 1221 bool update, u64 *changed, 1222 const char *frame) 1223 { 1224 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1225 struct ieee80211_sub_if_data *sdata = link->sdata; 1226 struct ieee80211_chan_req chanreq = {}; 1227 struct cfg80211_chan_def ap_chandef; 1228 enum ieee80211_conn_mode ap_mode; 1229 u32 vht_cap_info = 0; 1230 u16 ht_opmode; 1231 int ret; 1232 1233 /* don't track any bandwidth changes in legacy/S1G modes */ 1234 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1235 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1236 return 0; 1237 1238 if (elems->vht_cap_elem) 1239 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1240 1241 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1242 elems, true, &link->u.mgd.conn, 1243 &ap_chandef); 1244 1245 if (ap_mode != link->u.mgd.conn.mode) { 1246 link_info(link, 1247 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1248 link->u.mgd.bssid, 1249 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1250 ieee80211_conn_mode_str(ap_mode), frame); 1251 return -EINVAL; 1252 } 1253 1254 chanreq.oper = ap_chandef; 1255 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1256 &ap_chandef); 1257 1258 /* 1259 * if HT operation mode changed store the new one - 1260 * this may be applicable even if channel is identical 1261 */ 1262 if (elems->ht_operation) { 1263 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1264 if (link->conf->ht_operation_mode != ht_opmode) { 1265 *changed |= BSS_CHANGED_HT; 1266 link->conf->ht_operation_mode = ht_opmode; 1267 } 1268 } 1269 1270 /* 1271 * Downgrade the new channel if we associated with restricted 1272 * bandwidth capabilities. For example, if we associated as a 1273 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1274 * or config reasons) then switching to a 40 MHz channel now 1275 * won't do us any good -- we couldn't use it with the AP. 1276 */ 1277 while (link->u.mgd.conn.bw_limit < 1278 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1279 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1280 1281 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1282 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1283 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1284 &chanreq.oper); 1285 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1286 link->conf->tpe = elems->tpe; 1287 *changed |= BSS_CHANGED_TPE; 1288 } 1289 } 1290 1291 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1292 return 0; 1293 1294 link_info(link, 1295 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1296 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1297 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1298 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1299 chanreq.oper.center_freq2); 1300 1301 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1302 sdata_info(sdata, 1303 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1304 link->u.mgd.bssid, frame); 1305 return -EINVAL; 1306 } 1307 1308 if (!update) { 1309 link->conf->chanreq = chanreq; 1310 return 0; 1311 } 1312 1313 /* 1314 * We're tracking the current AP here, so don't do any further checks 1315 * here. This keeps us from playing ping-pong with regulatory, without 1316 * it the following can happen (for example): 1317 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1318 * - AP advertises regdom US 1319 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1320 * - we detect an unsupported channel and disconnect 1321 * - disconnect causes CRDA to reload world regdomain and the game 1322 * starts anew. 1323 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1324 * 1325 * It seems possible that there are still scenarios with CSA or real 1326 * bandwidth changes where a this could happen, but those cases are 1327 * less common and wouldn't completely prevent using the AP. 1328 */ 1329 1330 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1331 if (ret) { 1332 sdata_info(sdata, 1333 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1334 link->u.mgd.bssid, frame); 1335 return ret; 1336 } 1337 1338 cfg80211_schedule_channels_check(&sdata->wdev); 1339 return 0; 1340 } 1341 1342 /* frame sending functions */ 1343 1344 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1345 struct sk_buff *skb, u8 ap_ht_param, 1346 struct ieee80211_supported_band *sband, 1347 struct ieee80211_channel *channel, 1348 enum ieee80211_smps_mode smps, 1349 const struct ieee80211_conn_settings *conn) 1350 { 1351 u8 *pos; 1352 u32 flags = channel->flags; 1353 u16 cap; 1354 struct ieee80211_sta_ht_cap ht_cap; 1355 1356 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1357 1358 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1359 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1360 1361 /* determine capability flags */ 1362 cap = ht_cap.cap; 1363 1364 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1365 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1366 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1367 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1368 cap &= ~IEEE80211_HT_CAP_SGI_40; 1369 } 1370 break; 1371 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1372 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1373 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1374 cap &= ~IEEE80211_HT_CAP_SGI_40; 1375 } 1376 break; 1377 } 1378 1379 /* 1380 * If 40 MHz was disabled associate as though we weren't 1381 * capable of 40 MHz -- some broken APs will never fall 1382 * back to trying to transmit in 20 MHz. 1383 */ 1384 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1385 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1386 cap &= ~IEEE80211_HT_CAP_SGI_40; 1387 } 1388 1389 /* set SM PS mode properly */ 1390 cap &= ~IEEE80211_HT_CAP_SM_PS; 1391 switch (smps) { 1392 case IEEE80211_SMPS_AUTOMATIC: 1393 case IEEE80211_SMPS_NUM_MODES: 1394 WARN_ON(1); 1395 fallthrough; 1396 case IEEE80211_SMPS_OFF: 1397 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1398 IEEE80211_HT_CAP_SM_PS_SHIFT; 1399 break; 1400 case IEEE80211_SMPS_STATIC: 1401 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1402 IEEE80211_HT_CAP_SM_PS_SHIFT; 1403 break; 1404 case IEEE80211_SMPS_DYNAMIC: 1405 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1406 IEEE80211_HT_CAP_SM_PS_SHIFT; 1407 break; 1408 } 1409 1410 /* reserve and fill IE */ 1411 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1412 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1413 } 1414 1415 /* This function determines vht capability flags for the association 1416 * and builds the IE. 1417 * Note - the function returns true to own the MU-MIMO capability 1418 */ 1419 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1420 struct sk_buff *skb, 1421 struct ieee80211_supported_band *sband, 1422 struct ieee80211_vht_cap *ap_vht_cap, 1423 const struct ieee80211_conn_settings *conn) 1424 { 1425 struct ieee80211_local *local = sdata->local; 1426 u8 *pos; 1427 u32 cap; 1428 struct ieee80211_sta_vht_cap vht_cap; 1429 u32 mask, ap_bf_sts, our_bf_sts; 1430 bool mu_mimo_owner = false; 1431 1432 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1433 1434 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1435 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1436 1437 /* determine capability flags */ 1438 cap = vht_cap.cap; 1439 1440 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1441 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1442 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1443 } 1444 1445 /* 1446 * Some APs apparently get confused if our capabilities are better 1447 * than theirs, so restrict what we advertise in the assoc request. 1448 */ 1449 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1450 if (!(ap_vht_cap->vht_cap_info & 1451 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1452 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1453 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1454 else if (!(ap_vht_cap->vht_cap_info & 1455 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1456 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1457 } 1458 1459 /* 1460 * If some other vif is using the MU-MIMO capability we cannot associate 1461 * using MU-MIMO - this will lead to contradictions in the group-id 1462 * mechanism. 1463 * Ownership is defined since association request, in order to avoid 1464 * simultaneous associations with MU-MIMO. 1465 */ 1466 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1467 bool disable_mu_mimo = false; 1468 struct ieee80211_sub_if_data *other; 1469 1470 list_for_each_entry(other, &local->interfaces, list) { 1471 if (other->vif.bss_conf.mu_mimo_owner) { 1472 disable_mu_mimo = true; 1473 break; 1474 } 1475 } 1476 if (disable_mu_mimo) 1477 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1478 else 1479 mu_mimo_owner = true; 1480 } 1481 1482 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1483 1484 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1485 our_bf_sts = cap & mask; 1486 1487 if (ap_bf_sts < our_bf_sts) { 1488 cap &= ~mask; 1489 cap |= ap_bf_sts; 1490 } 1491 1492 /* reserve and fill IE */ 1493 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1494 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1495 1496 return mu_mimo_owner; 1497 } 1498 1499 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1500 struct sk_buff *skb, 1501 enum nl80211_chan_width width, 1502 struct ieee80211_supported_band *sband, 1503 struct ieee80211_mgd_assoc_data *assoc_data) 1504 { 1505 u32 rates; 1506 1507 if (assoc_data->supp_rates_len && 1508 !ieee80211_hw_check(&local->hw, STRICT)) { 1509 /* 1510 * Get all rates supported by the device and the AP as 1511 * some APs don't like getting a superset of their rates 1512 * in the association request (e.g. D-Link DAP 1353 in 1513 * b-only mode)... 1514 */ 1515 ieee80211_parse_bitrates(width, sband, 1516 assoc_data->supp_rates, 1517 assoc_data->supp_rates_len, 1518 &rates); 1519 } else { 1520 /* 1521 * In case AP not provide any supported rates information 1522 * before association, we send information element(s) with 1523 * all rates that we support. 1524 */ 1525 rates = ~0; 1526 } 1527 1528 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1529 WLAN_EID_SUPP_RATES); 1530 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1531 WLAN_EID_EXT_SUPP_RATES); 1532 } 1533 1534 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1535 const u8 *elems, 1536 size_t elems_len, 1537 size_t offset) 1538 { 1539 size_t noffset; 1540 1541 static const u8 before_ht[] = { 1542 WLAN_EID_SSID, 1543 WLAN_EID_SUPP_RATES, 1544 WLAN_EID_EXT_SUPP_RATES, 1545 WLAN_EID_PWR_CAPABILITY, 1546 WLAN_EID_SUPPORTED_CHANNELS, 1547 WLAN_EID_RSN, 1548 WLAN_EID_QOS_CAPA, 1549 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1550 WLAN_EID_MOBILITY_DOMAIN, 1551 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1552 WLAN_EID_RIC_DATA, /* reassoc only */ 1553 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1554 }; 1555 static const u8 after_ric[] = { 1556 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1557 WLAN_EID_HT_CAPABILITY, 1558 WLAN_EID_BSS_COEX_2040, 1559 /* luckily this is almost always there */ 1560 WLAN_EID_EXT_CAPABILITY, 1561 WLAN_EID_QOS_TRAFFIC_CAPA, 1562 WLAN_EID_TIM_BCAST_REQ, 1563 WLAN_EID_INTERWORKING, 1564 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1565 WLAN_EID_VHT_CAPABILITY, 1566 WLAN_EID_OPMODE_NOTIF, 1567 }; 1568 1569 if (!elems_len) 1570 return offset; 1571 1572 noffset = ieee80211_ie_split_ric(elems, elems_len, 1573 before_ht, 1574 ARRAY_SIZE(before_ht), 1575 after_ric, 1576 ARRAY_SIZE(after_ric), 1577 offset); 1578 skb_put_data(skb, elems + offset, noffset - offset); 1579 1580 return noffset; 1581 } 1582 1583 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1584 const u8 *elems, 1585 size_t elems_len, 1586 size_t offset) 1587 { 1588 static const u8 before_vht[] = { 1589 /* 1590 * no need to list the ones split off before HT 1591 * or generated here 1592 */ 1593 WLAN_EID_BSS_COEX_2040, 1594 WLAN_EID_EXT_CAPABILITY, 1595 WLAN_EID_QOS_TRAFFIC_CAPA, 1596 WLAN_EID_TIM_BCAST_REQ, 1597 WLAN_EID_INTERWORKING, 1598 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1599 }; 1600 size_t noffset; 1601 1602 if (!elems_len) 1603 return offset; 1604 1605 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1606 noffset = ieee80211_ie_split(elems, elems_len, 1607 before_vht, ARRAY_SIZE(before_vht), 1608 offset); 1609 skb_put_data(skb, elems + offset, noffset - offset); 1610 1611 return noffset; 1612 } 1613 1614 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1615 const u8 *elems, 1616 size_t elems_len, 1617 size_t offset) 1618 { 1619 static const u8 before_he[] = { 1620 /* 1621 * no need to list the ones split off before VHT 1622 * or generated here 1623 */ 1624 WLAN_EID_OPMODE_NOTIF, 1625 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1626 /* 11ai elements */ 1627 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1628 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1629 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1630 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1631 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1632 /* TODO: add 11ah/11aj/11ak elements */ 1633 }; 1634 size_t noffset; 1635 1636 if (!elems_len) 1637 return offset; 1638 1639 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1640 noffset = ieee80211_ie_split(elems, elems_len, 1641 before_he, ARRAY_SIZE(before_he), 1642 offset); 1643 skb_put_data(skb, elems + offset, noffset - offset); 1644 1645 return noffset; 1646 } 1647 1648 #define PRESENT_ELEMS_MAX 8 1649 #define PRESENT_ELEM_EXT_OFFS 0x100 1650 1651 static void 1652 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1653 struct sk_buff *skb, u16 capab, 1654 const struct element *ext_capa, 1655 const u16 *present_elems, 1656 struct ieee80211_mgd_assoc_data *assoc_data); 1657 1658 static size_t 1659 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1660 struct sk_buff *skb, u16 *capab, 1661 const struct element *ext_capa, 1662 const u8 *extra_elems, 1663 size_t extra_elems_len, 1664 unsigned int link_id, 1665 struct ieee80211_link_data *link, 1666 u16 *present_elems, 1667 struct ieee80211_mgd_assoc_data *assoc_data) 1668 { 1669 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1670 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1671 struct ieee80211_channel *chan = cbss->channel; 1672 const struct ieee80211_sband_iftype_data *iftd; 1673 struct ieee80211_local *local = sdata->local; 1674 struct ieee80211_supported_band *sband; 1675 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1676 struct ieee80211_chanctx_conf *chanctx_conf; 1677 enum ieee80211_smps_mode smps_mode; 1678 u16 orig_capab = *capab; 1679 size_t offset = 0; 1680 int present_elems_len = 0; 1681 u8 *pos; 1682 int i; 1683 1684 #define ADD_PRESENT_ELEM(id) do { \ 1685 /* need a last for termination - we use 0 == SSID */ \ 1686 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1687 present_elems[present_elems_len++] = (id); \ 1688 } while (0) 1689 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1690 1691 if (link) 1692 smps_mode = link->smps_mode; 1693 else if (sdata->u.mgd.powersave) 1694 smps_mode = IEEE80211_SMPS_DYNAMIC; 1695 else 1696 smps_mode = IEEE80211_SMPS_OFF; 1697 1698 if (link) { 1699 /* 1700 * 5/10 MHz scenarios are only viable without MLO, in which 1701 * case this pointer should be used ... All of this is a bit 1702 * unclear though, not sure this even works at all. 1703 */ 1704 rcu_read_lock(); 1705 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1706 if (chanctx_conf) 1707 width = chanctx_conf->def.width; 1708 rcu_read_unlock(); 1709 } 1710 1711 sband = local->hw.wiphy->bands[chan->band]; 1712 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1713 1714 if (sband->band == NL80211_BAND_2GHZ) { 1715 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1716 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1717 } 1718 1719 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1720 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1721 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1722 1723 if (sband->band != NL80211_BAND_S1GHZ) 1724 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1725 1726 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1727 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1728 struct cfg80211_chan_def chandef = { 1729 .width = width, 1730 .chan = chan, 1731 }; 1732 1733 pos = skb_put(skb, 4); 1734 *pos++ = WLAN_EID_PWR_CAPABILITY; 1735 *pos++ = 2; 1736 *pos++ = 0; /* min tx power */ 1737 /* max tx power */ 1738 *pos++ = ieee80211_chandef_max_power(&chandef); 1739 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1740 } 1741 1742 /* 1743 * Per spec, we shouldn't include the list of channels if we advertise 1744 * support for extended channel switching, but we've always done that; 1745 * (for now?) apply this restriction only on the (new) 6 GHz band. 1746 */ 1747 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1748 (sband->band != NL80211_BAND_6GHZ || 1749 !ext_capa || ext_capa->datalen < 1 || 1750 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1751 /* TODO: get this in reg domain format */ 1752 pos = skb_put(skb, 2 * sband->n_channels + 2); 1753 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1754 *pos++ = 2 * sband->n_channels; 1755 for (i = 0; i < sband->n_channels; i++) { 1756 int cf = sband->channels[i].center_freq; 1757 1758 *pos++ = ieee80211_frequency_to_channel(cf); 1759 *pos++ = 1; /* one channel in the subband*/ 1760 } 1761 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1762 } 1763 1764 /* if present, add any custom IEs that go before HT */ 1765 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1766 extra_elems_len, 1767 offset); 1768 1769 if (sband->band != NL80211_BAND_6GHZ && 1770 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1771 ieee80211_add_ht_ie(sdata, skb, 1772 assoc_data->link[link_id].ap_ht_param, 1773 sband, chan, smps_mode, 1774 &assoc_data->link[link_id].conn); 1775 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1776 } 1777 1778 /* if present, add any custom IEs that go before VHT */ 1779 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1780 extra_elems_len, 1781 offset); 1782 1783 if (sband->band != NL80211_BAND_6GHZ && 1784 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1785 sband->vht_cap.vht_supported) { 1786 bool mu_mimo_owner = 1787 ieee80211_add_vht_ie(sdata, skb, sband, 1788 &assoc_data->link[link_id].ap_vht_cap, 1789 &assoc_data->link[link_id].conn); 1790 1791 if (link) 1792 link->conf->mu_mimo_owner = mu_mimo_owner; 1793 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1794 } 1795 1796 /* if present, add any custom IEs that go before HE */ 1797 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1798 extra_elems_len, 1799 offset); 1800 1801 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1802 ieee80211_put_he_cap(skb, sdata, sband, 1803 &assoc_data->link[link_id].conn); 1804 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1805 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1806 } 1807 1808 /* 1809 * careful - need to know about all the present elems before 1810 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1811 * we're going to put it after the ML element 1812 */ 1813 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1814 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1815 1816 if (link_id == assoc_data->assoc_link_id) 1817 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1818 present_elems, assoc_data); 1819 1820 /* crash if somebody gets it wrong */ 1821 present_elems = NULL; 1822 1823 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1824 ieee80211_put_eht_cap(skb, sdata, sband, 1825 &assoc_data->link[link_id].conn); 1826 1827 if (sband->band == NL80211_BAND_S1GHZ) { 1828 ieee80211_add_aid_request_ie(sdata, skb); 1829 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1830 } 1831 1832 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1833 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1834 1835 return offset; 1836 } 1837 1838 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1839 const u16 *outer, 1840 const u16 *inner) 1841 { 1842 unsigned int skb_len = skb->len; 1843 bool at_extension = false; 1844 bool added = false; 1845 int i, j; 1846 u8 *len, *list_len = NULL; 1847 1848 skb_put_u8(skb, WLAN_EID_EXTENSION); 1849 len = skb_put(skb, 1); 1850 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1851 1852 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1853 u16 elem = outer[i]; 1854 bool have_inner = false; 1855 1856 /* should at least be sorted in the sense of normal -> ext */ 1857 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1858 1859 /* switch to extension list */ 1860 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1861 at_extension = true; 1862 if (!list_len) 1863 skb_put_u8(skb, 0); 1864 list_len = NULL; 1865 } 1866 1867 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1868 if (elem == inner[j]) { 1869 have_inner = true; 1870 break; 1871 } 1872 } 1873 1874 if (have_inner) 1875 continue; 1876 1877 if (!list_len) { 1878 list_len = skb_put(skb, 1); 1879 *list_len = 0; 1880 } 1881 *list_len += 1; 1882 skb_put_u8(skb, (u8)elem); 1883 added = true; 1884 } 1885 1886 /* if we added a list but no extension list, make a zero-len one */ 1887 if (added && (!at_extension || !list_len)) 1888 skb_put_u8(skb, 0); 1889 1890 /* if nothing added remove extension element completely */ 1891 if (!added) 1892 skb_trim(skb, skb_len); 1893 else 1894 *len = skb->len - skb_len - 2; 1895 } 1896 1897 static void 1898 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1899 struct sk_buff *skb, u16 capab, 1900 const struct element *ext_capa, 1901 const u16 *outer_present_elems, 1902 struct ieee80211_mgd_assoc_data *assoc_data) 1903 { 1904 struct ieee80211_local *local = sdata->local; 1905 struct ieee80211_multi_link_elem *ml_elem; 1906 struct ieee80211_mle_basic_common_info *common; 1907 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1908 __le16 eml_capa = 0, mld_capa_ops = 0; 1909 unsigned int link_id; 1910 u8 *ml_elem_len; 1911 void *capab_pos; 1912 1913 if (!ieee80211_vif_is_mld(&sdata->vif)) 1914 return; 1915 1916 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1917 ieee80211_vif_type_p2p(&sdata->vif)); 1918 if (ift_ext_capa) { 1919 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1920 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1921 } 1922 1923 skb_put_u8(skb, WLAN_EID_EXTENSION); 1924 ml_elem_len = skb_put(skb, 1); 1925 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1926 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1927 ml_elem->control = 1928 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1929 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1930 common = skb_put(skb, sizeof(*common)); 1931 common->len = sizeof(*common) + 1932 2; /* MLD capa/ops */ 1933 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1934 1935 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1936 if (eml_capa & 1937 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1938 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1939 common->len += 2; /* EML capabilities */ 1940 ml_elem->control |= 1941 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1942 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1943 } 1944 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1945 1946 /* Many APs have broken parsing of the extended MLD capa/ops field, 1947 * dropping (re-)association request frames or replying with association 1948 * response with a failure status if it's present. Without a clear 1949 * indication as to whether the AP supports parsing this field or not do 1950 * not include it in the common information unless strict mode is set. 1951 */ 1952 if (ieee80211_hw_check(&local->hw, STRICT) && 1953 assoc_data->ext_mld_capa_ops) { 1954 ml_elem->control |= 1955 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 1956 common->len += 2; 1957 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 1958 sizeof(assoc_data->ext_mld_capa_ops)); 1959 } 1960 1961 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1962 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1963 const u8 *extra_elems; 1964 size_t extra_elems_len; 1965 size_t extra_used; 1966 u8 *subelem_len = NULL; 1967 __le16 ctrl; 1968 1969 if (!assoc_data->link[link_id].bss || 1970 link_id == assoc_data->assoc_link_id) 1971 continue; 1972 1973 extra_elems = assoc_data->link[link_id].elems; 1974 extra_elems_len = assoc_data->link[link_id].elems_len; 1975 1976 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1977 subelem_len = skb_put(skb, 1); 1978 1979 ctrl = cpu_to_le16(link_id | 1980 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1981 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1982 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1983 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1984 skb_put_data(skb, assoc_data->link[link_id].addr, 1985 ETH_ALEN); 1986 /* 1987 * Now add the contents of the (re)association request, 1988 * but the "listen interval" and "current AP address" 1989 * (if applicable) are skipped. So we only have 1990 * the capability field (remember the position and fill 1991 * later), followed by the elements added below by 1992 * calling ieee80211_add_link_elems(). 1993 */ 1994 capab_pos = skb_put(skb, 2); 1995 1996 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 1997 ext_capa, 1998 extra_elems, 1999 extra_elems_len, 2000 link_id, NULL, 2001 link_present_elems, 2002 assoc_data); 2003 if (extra_elems) 2004 skb_put_data(skb, extra_elems + extra_used, 2005 extra_elems_len - extra_used); 2006 2007 put_unaligned_le16(capab, capab_pos); 2008 2009 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2010 link_present_elems); 2011 2012 ieee80211_fragment_element(skb, subelem_len, 2013 IEEE80211_MLE_SUBELEM_FRAGMENT); 2014 } 2015 2016 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2017 } 2018 2019 static int 2020 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2021 enum nl80211_iftype iftype, 2022 struct cfg80211_bss *cbss, 2023 size_t elems_len) 2024 { 2025 struct ieee80211_local *local = sdata->local; 2026 const struct ieee80211_sband_iftype_data *iftd; 2027 struct ieee80211_supported_band *sband; 2028 size_t size = 0; 2029 2030 if (!cbss) 2031 return size; 2032 2033 sband = local->hw.wiphy->bands[cbss->channel->band]; 2034 2035 /* add STA profile elements length */ 2036 size += elems_len; 2037 2038 /* and supported rates length */ 2039 size += 4 + sband->n_bitrates; 2040 2041 /* supported channels */ 2042 size += 2 + 2 * sband->n_channels; 2043 2044 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2045 if (iftd) 2046 size += iftd->vendor_elems.len; 2047 2048 /* power capability */ 2049 size += 4; 2050 2051 /* HT, VHT, HE, EHT */ 2052 size += 2 + sizeof(struct ieee80211_ht_cap); 2053 size += 2 + sizeof(struct ieee80211_vht_cap); 2054 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2055 sizeof(struct ieee80211_he_mcs_nss_supp) + 2056 IEEE80211_HE_PPE_THRES_MAX_LEN; 2057 2058 if (sband->band == NL80211_BAND_6GHZ) 2059 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2060 2061 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2062 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2063 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2064 2065 return size; 2066 } 2067 2068 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2069 { 2070 struct ieee80211_local *local = sdata->local; 2071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2072 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2073 struct ieee80211_link_data *link; 2074 struct sk_buff *skb; 2075 struct ieee80211_mgmt *mgmt; 2076 u8 *pos, qos_info, *ie_start; 2077 size_t offset, noffset; 2078 u16 capab = 0, link_capab; 2079 __le16 listen_int; 2080 struct element *ext_capa = NULL; 2081 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2082 struct ieee80211_prep_tx_info info = {}; 2083 unsigned int link_id, n_links = 0; 2084 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2085 void *capab_pos; 2086 size_t size; 2087 int ret; 2088 2089 /* we know it's writable, cast away the const */ 2090 if (assoc_data->ie_len) 2091 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2092 assoc_data->ie, 2093 assoc_data->ie_len); 2094 2095 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2096 2097 size = local->hw.extra_tx_headroom + 2098 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2099 2 + assoc_data->ssid_len + /* SSID */ 2100 assoc_data->ie_len + /* extra IEs */ 2101 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2102 9; /* WMM */ 2103 2104 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2105 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2106 size_t elems_len = assoc_data->link[link_id].elems_len; 2107 2108 if (!cbss) 2109 continue; 2110 2111 n_links++; 2112 2113 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2114 elems_len); 2115 2116 /* non-inheritance element */ 2117 size += 2 + 2 + PRESENT_ELEMS_MAX; 2118 2119 /* should be the same across all BSSes */ 2120 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2121 capab |= WLAN_CAPABILITY_PRIVACY; 2122 } 2123 2124 if (ieee80211_vif_is_mld(&sdata->vif)) { 2125 /* consider the multi-link element with STA profile */ 2126 size += sizeof(struct ieee80211_multi_link_elem); 2127 /* max common info field in basic multi-link element */ 2128 size += sizeof(struct ieee80211_mle_basic_common_info) + 2129 2 + /* capa & op */ 2130 2 + /* ext capa & op */ 2131 2; /* EML capa */ 2132 2133 /* 2134 * The capability elements were already considered above; 2135 * note this over-estimates a bit because there's no 2136 * STA profile for the assoc link. 2137 */ 2138 size += (n_links - 1) * 2139 (1 + 1 + /* subelement ID/length */ 2140 2 + /* STA control */ 2141 1 + ETH_ALEN + 2 /* STA Info field */); 2142 } 2143 2144 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2145 if (WARN_ON(!link)) 2146 return -EINVAL; 2147 2148 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2149 return -EINVAL; 2150 2151 skb = alloc_skb(size, GFP_KERNEL); 2152 if (!skb) 2153 return -ENOMEM; 2154 2155 skb_reserve(skb, local->hw.extra_tx_headroom); 2156 2157 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2158 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2159 2160 /* Set MBSSID support for HE AP if needed */ 2161 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2162 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2163 ext_capa && ext_capa->datalen >= 3) 2164 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2165 2166 mgmt = skb_put_zero(skb, 24); 2167 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2168 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2169 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2170 2171 listen_int = cpu_to_le16(assoc_data->s1g ? 2172 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2173 local->hw.conf.listen_interval); 2174 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2175 skb_put(skb, 10); 2176 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2177 IEEE80211_STYPE_REASSOC_REQ); 2178 capab_pos = &mgmt->u.reassoc_req.capab_info; 2179 mgmt->u.reassoc_req.listen_interval = listen_int; 2180 memcpy(mgmt->u.reassoc_req.current_ap, 2181 assoc_data->prev_ap_addr, ETH_ALEN); 2182 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2183 } else { 2184 skb_put(skb, 4); 2185 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2186 IEEE80211_STYPE_ASSOC_REQ); 2187 capab_pos = &mgmt->u.assoc_req.capab_info; 2188 mgmt->u.assoc_req.listen_interval = listen_int; 2189 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2190 } 2191 2192 /* SSID */ 2193 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2194 ie_start = pos; 2195 *pos++ = WLAN_EID_SSID; 2196 *pos++ = assoc_data->ssid_len; 2197 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2198 2199 /* 2200 * This bit is technically reserved, so it shouldn't matter for either 2201 * the AP or us, but it also means we shouldn't set it. However, we've 2202 * always set it in the past, and apparently some EHT APs check that 2203 * we don't set it. To avoid interoperability issues with old APs that 2204 * for some reason check it and want it to be set, set the bit for all 2205 * pre-EHT connections as we used to do. 2206 */ 2207 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2208 !ieee80211_hw_check(&local->hw, STRICT)) 2209 capab |= WLAN_CAPABILITY_ESS; 2210 2211 /* add the elements for the assoc (main) link */ 2212 link_capab = capab; 2213 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2214 ext_capa, 2215 assoc_data->ie, 2216 assoc_data->ie_len, 2217 assoc_data->assoc_link_id, link, 2218 present_elems, assoc_data); 2219 put_unaligned_le16(link_capab, capab_pos); 2220 2221 /* if present, add any custom non-vendor IEs */ 2222 if (assoc_data->ie_len) { 2223 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2224 assoc_data->ie_len, 2225 offset); 2226 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2227 offset = noffset; 2228 } 2229 2230 if (assoc_data->wmm) { 2231 if (assoc_data->uapsd) { 2232 qos_info = ifmgd->uapsd_queues; 2233 qos_info |= (ifmgd->uapsd_max_sp_len << 2234 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2235 } else { 2236 qos_info = 0; 2237 } 2238 2239 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2240 } 2241 2242 /* add any remaining custom (i.e. vendor specific here) IEs */ 2243 if (assoc_data->ie_len) { 2244 noffset = assoc_data->ie_len; 2245 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2246 } 2247 2248 if (assoc_data->fils_kek_len) { 2249 ret = fils_encrypt_assoc_req(skb, assoc_data); 2250 if (ret < 0) { 2251 dev_kfree_skb(skb); 2252 return ret; 2253 } 2254 } 2255 2256 pos = skb_tail_pointer(skb); 2257 kfree(ifmgd->assoc_req_ies); 2258 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2259 if (!ifmgd->assoc_req_ies) { 2260 dev_kfree_skb(skb); 2261 return -ENOMEM; 2262 } 2263 2264 ifmgd->assoc_req_ies_len = pos - ie_start; 2265 2266 info.link_id = assoc_data->assoc_link_id; 2267 drv_mgd_prepare_tx(local, sdata, &info); 2268 2269 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2270 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2271 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2272 IEEE80211_TX_INTFL_MLME_CONN_TX; 2273 ieee80211_tx_skb(sdata, skb); 2274 2275 return 0; 2276 } 2277 2278 void ieee80211_send_pspoll(struct ieee80211_local *local, 2279 struct ieee80211_sub_if_data *sdata) 2280 { 2281 struct ieee80211_pspoll *pspoll; 2282 struct sk_buff *skb; 2283 2284 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2285 if (!skb) 2286 return; 2287 2288 pspoll = (struct ieee80211_pspoll *) skb->data; 2289 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2290 2291 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2292 ieee80211_tx_skb(sdata, skb); 2293 } 2294 2295 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2296 struct ieee80211_sub_if_data *sdata, 2297 bool powersave) 2298 { 2299 struct sk_buff *skb; 2300 struct ieee80211_hdr_3addr *nullfunc; 2301 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2302 2303 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2304 !ieee80211_hw_check(&local->hw, 2305 DOESNT_SUPPORT_QOS_NDP)); 2306 if (!skb) 2307 return; 2308 2309 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2310 if (powersave) 2311 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2312 2313 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2314 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2315 2316 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2317 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2318 2319 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2321 2322 ieee80211_tx_skb(sdata, skb); 2323 } 2324 2325 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2326 struct ieee80211_sub_if_data *sdata) 2327 { 2328 struct sk_buff *skb; 2329 struct ieee80211_hdr *nullfunc; 2330 __le16 fc; 2331 2332 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2333 return; 2334 2335 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2336 if (!skb) 2337 return; 2338 2339 skb_reserve(skb, local->hw.extra_tx_headroom); 2340 2341 nullfunc = skb_put_zero(skb, 30); 2342 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2343 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2344 nullfunc->frame_control = fc; 2345 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2346 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2347 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2348 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2349 2350 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2351 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2352 ieee80211_tx_skb(sdata, skb); 2353 } 2354 2355 /* spectrum management related things */ 2356 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2357 struct wiphy_work *work) 2358 { 2359 struct ieee80211_link_data *link = 2360 container_of(work, struct ieee80211_link_data, 2361 u.mgd.csa.switch_work.work); 2362 struct ieee80211_sub_if_data *sdata = link->sdata; 2363 struct ieee80211_local *local = sdata->local; 2364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2365 int ret; 2366 2367 if (!ieee80211_sdata_running(sdata)) 2368 return; 2369 2370 lockdep_assert_wiphy(local->hw.wiphy); 2371 2372 if (!ifmgd->associated) 2373 return; 2374 2375 if (!link->conf->csa_active) 2376 return; 2377 2378 /* 2379 * If the link isn't active (now), we cannot wait for beacons, won't 2380 * have a reserved chanctx, etc. Just switch over the chandef and 2381 * update cfg80211 directly. 2382 */ 2383 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2384 link->conf->chanreq = link->csa.chanreq; 2385 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2386 link->link_id); 2387 return; 2388 } 2389 2390 /* 2391 * using reservation isn't immediate as it may be deferred until later 2392 * with multi-vif. once reservation is complete it will re-schedule the 2393 * work with no reserved_chanctx so verify chandef to check if it 2394 * completed successfully 2395 */ 2396 2397 if (link->reserved_chanctx) { 2398 /* 2399 * with multi-vif csa driver may call ieee80211_csa_finish() 2400 * many times while waiting for other interfaces to use their 2401 * reservations 2402 */ 2403 if (link->reserved_ready) 2404 return; 2405 2406 ret = ieee80211_link_use_reserved_context(link); 2407 if (ret) { 2408 link_info(link, 2409 "failed to use reserved channel context, disconnecting (err=%d)\n", 2410 ret); 2411 wiphy_work_queue(sdata->local->hw.wiphy, 2412 &ifmgd->csa_connection_drop_work); 2413 } 2414 return; 2415 } 2416 2417 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2418 &link->csa.chanreq)) { 2419 link_info(link, 2420 "failed to finalize channel switch, disconnecting\n"); 2421 wiphy_work_queue(sdata->local->hw.wiphy, 2422 &ifmgd->csa_connection_drop_work); 2423 return; 2424 } 2425 2426 link->u.mgd.csa.waiting_bcn = true; 2427 2428 /* apply new TPE restrictions immediately on the new channel */ 2429 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2430 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2431 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2432 &link->u.mgd.csa.ap_chandef, 2433 &link->conf->chanreq.oper); 2434 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2435 sizeof(link->u.mgd.csa.tpe))) { 2436 link->conf->tpe = link->u.mgd.csa.tpe; 2437 ieee80211_link_info_change_notify(sdata, link, 2438 BSS_CHANGED_TPE); 2439 } 2440 } 2441 2442 ieee80211_sta_reset_beacon_monitor(sdata); 2443 ieee80211_sta_reset_conn_monitor(sdata); 2444 } 2445 2446 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2447 { 2448 struct ieee80211_sub_if_data *sdata = link->sdata; 2449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2450 int ret; 2451 2452 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2453 2454 WARN_ON(!link->conf->csa_active); 2455 2456 ieee80211_vif_unblock_queues_csa(sdata); 2457 2458 link->conf->csa_active = false; 2459 link->u.mgd.csa.blocked_tx = false; 2460 link->u.mgd.csa.waiting_bcn = false; 2461 2462 ret = drv_post_channel_switch(link); 2463 if (ret) { 2464 link_info(link, 2465 "driver post channel switch failed, disconnecting\n"); 2466 wiphy_work_queue(sdata->local->hw.wiphy, 2467 &ifmgd->csa_connection_drop_work); 2468 return; 2469 } 2470 2471 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2472 link->link_id); 2473 } 2474 2475 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2476 unsigned int link_id) 2477 { 2478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2479 2480 trace_api_chswitch_done(sdata, success, link_id); 2481 2482 rcu_read_lock(); 2483 2484 if (!success) { 2485 sdata_info(sdata, 2486 "driver channel switch failed (link %d), disconnecting\n", 2487 link_id); 2488 wiphy_work_queue(sdata->local->hw.wiphy, 2489 &sdata->u.mgd.csa_connection_drop_work); 2490 } else { 2491 struct ieee80211_link_data *link = 2492 rcu_dereference(sdata->link[link_id]); 2493 2494 if (WARN_ON(!link)) { 2495 rcu_read_unlock(); 2496 return; 2497 } 2498 2499 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2500 &link->u.mgd.csa.switch_work, 0); 2501 } 2502 2503 rcu_read_unlock(); 2504 } 2505 EXPORT_SYMBOL(ieee80211_chswitch_done); 2506 2507 static void 2508 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2509 { 2510 struct ieee80211_sub_if_data *sdata = link->sdata; 2511 struct ieee80211_local *local = sdata->local; 2512 2513 lockdep_assert_wiphy(local->hw.wiphy); 2514 2515 if (!local->ops->abort_channel_switch) 2516 return; 2517 2518 ieee80211_link_unreserve_chanctx(link); 2519 2520 ieee80211_vif_unblock_queues_csa(sdata); 2521 2522 link->conf->csa_active = false; 2523 link->u.mgd.csa.blocked_tx = false; 2524 2525 drv_abort_channel_switch(link); 2526 } 2527 2528 struct sta_csa_rnr_iter_data { 2529 struct ieee80211_link_data *link; 2530 struct ieee80211_channel *chan; 2531 u8 mld_id; 2532 }; 2533 2534 static enum cfg80211_rnr_iter_ret 2535 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2536 const struct ieee80211_neighbor_ap_info *info, 2537 const u8 *tbtt_info, u8 tbtt_info_len) 2538 { 2539 struct sta_csa_rnr_iter_data *data = _data; 2540 struct ieee80211_link_data *link = data->link; 2541 struct ieee80211_sub_if_data *sdata = link->sdata; 2542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2543 const struct ieee80211_tbtt_info_ge_11 *ti; 2544 enum nl80211_band band; 2545 unsigned int center_freq; 2546 int link_id; 2547 2548 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2549 return RNR_ITER_CONTINUE; 2550 2551 if (tbtt_info_len < sizeof(*ti)) 2552 return RNR_ITER_CONTINUE; 2553 2554 ti = (const void *)tbtt_info; 2555 2556 if (ti->mld_params.mld_id != data->mld_id) 2557 return RNR_ITER_CONTINUE; 2558 2559 link_id = le16_get_bits(ti->mld_params.params, 2560 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2561 if (link_id != data->link->link_id) 2562 return RNR_ITER_CONTINUE; 2563 2564 /* we found the entry for our link! */ 2565 2566 /* this AP is confused, it had this right before ... just disconnect */ 2567 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2568 link_info(link, 2569 "AP now has invalid operating class in RNR, disconnect\n"); 2570 wiphy_work_queue(sdata->local->hw.wiphy, 2571 &ifmgd->csa_connection_drop_work); 2572 return RNR_ITER_BREAK; 2573 } 2574 2575 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2576 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2577 2578 return RNR_ITER_BREAK; 2579 } 2580 2581 static void 2582 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2583 struct ieee802_11_elems *elems) 2584 { 2585 struct ieee80211_sub_if_data *sdata = link->sdata; 2586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2587 struct sta_csa_rnr_iter_data data = { 2588 .link = link, 2589 }; 2590 2591 /* 2592 * If we get here, we see a beacon from another link without 2593 * CSA still being reported for it, so now we have to check 2594 * if the CSA was aborted or completed. This may not even be 2595 * perfectly possible if the CSA was only done for changing 2596 * the puncturing, but in that case if the link in inactive 2597 * we don't really care, and if it's an active link (or when 2598 * it's activated later) we'll get a beacon and adjust. 2599 */ 2600 2601 if (WARN_ON(!elems->ml_basic)) 2602 return; 2603 2604 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2605 2606 /* 2607 * So in order to do this, iterate the RNR element(s) and see 2608 * what channel is reported now. 2609 */ 2610 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2611 ieee80211_sta_csa_rnr_iter, &data); 2612 2613 if (!data.chan) { 2614 link_info(link, 2615 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2616 wiphy_work_queue(sdata->local->hw.wiphy, 2617 &ifmgd->csa_connection_drop_work); 2618 return; 2619 } 2620 2621 /* 2622 * If it doesn't match the CSA, then assume it aborted. This 2623 * may erroneously detect that it was _not_ aborted when it 2624 * was in fact aborted, but only changed the bandwidth or the 2625 * puncturing configuration, but we don't have enough data to 2626 * detect that. 2627 */ 2628 if (data.chan != link->csa.chanreq.oper.chan) 2629 ieee80211_sta_abort_chanswitch(link); 2630 } 2631 2632 enum ieee80211_csa_source { 2633 IEEE80211_CSA_SOURCE_BEACON, 2634 IEEE80211_CSA_SOURCE_OTHER_LINK, 2635 IEEE80211_CSA_SOURCE_PROT_ACTION, 2636 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2637 }; 2638 2639 static void 2640 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2641 u64 timestamp, u32 device_timestamp, 2642 struct ieee802_11_elems *full_elems, 2643 struct ieee802_11_elems *csa_elems, 2644 enum ieee80211_csa_source source) 2645 { 2646 struct ieee80211_sub_if_data *sdata = link->sdata; 2647 struct ieee80211_local *local = sdata->local; 2648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2649 struct ieee80211_chanctx *chanctx = NULL; 2650 struct ieee80211_chanctx_conf *conf; 2651 struct ieee80211_csa_ie csa_ie = {}; 2652 struct ieee80211_channel_switch ch_switch = { 2653 .link_id = link->link_id, 2654 .timestamp = timestamp, 2655 .device_timestamp = device_timestamp, 2656 }; 2657 unsigned long now; 2658 int res; 2659 2660 lockdep_assert_wiphy(local->hw.wiphy); 2661 2662 if (csa_elems) { 2663 struct cfg80211_bss *cbss = link->conf->bss; 2664 enum nl80211_band current_band; 2665 struct ieee80211_bss *bss; 2666 2667 if (WARN_ON(!cbss)) 2668 return; 2669 2670 current_band = cbss->channel->band; 2671 bss = (void *)cbss->priv; 2672 2673 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2674 current_band, 2675 bss->vht_cap_info, 2676 &link->u.mgd.conn, 2677 link->u.mgd.bssid, 2678 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2679 &csa_ie); 2680 if (res == 0) { 2681 ch_switch.block_tx = csa_ie.mode; 2682 ch_switch.chandef = csa_ie.chanreq.oper; 2683 ch_switch.count = csa_ie.count; 2684 ch_switch.delay = csa_ie.max_switch_time; 2685 } 2686 2687 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2688 } else { 2689 /* 2690 * If there was no per-STA profile for this link, we 2691 * get called with csa_elems == NULL. This of course means 2692 * there are no CSA elements, so set res=1 indicating 2693 * no more CSA. 2694 */ 2695 res = 1; 2696 } 2697 2698 if (res < 0) { 2699 /* ignore this case, not a protected frame */ 2700 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2701 return; 2702 goto drop_connection; 2703 } 2704 2705 if (link->conf->csa_active) { 2706 switch (source) { 2707 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2708 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2709 /* already processing - disregard action frames */ 2710 return; 2711 case IEEE80211_CSA_SOURCE_BEACON: 2712 if (link->u.mgd.csa.waiting_bcn) { 2713 ieee80211_chswitch_post_beacon(link); 2714 /* 2715 * If the CSA is still present after the switch 2716 * we need to consider it as a new CSA (possibly 2717 * to self). This happens by not returning here 2718 * so we'll get to the check below. 2719 */ 2720 } else if (res) { 2721 ieee80211_sta_abort_chanswitch(link); 2722 return; 2723 } else { 2724 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2725 return; 2726 } 2727 break; 2728 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2729 /* active link: we want to see the beacon to continue */ 2730 if (ieee80211_vif_link_active(&sdata->vif, 2731 link->link_id)) 2732 return; 2733 2734 /* switch work ran, so just complete the process */ 2735 if (link->u.mgd.csa.waiting_bcn) { 2736 ieee80211_chswitch_post_beacon(link); 2737 /* 2738 * If the CSA is still present after the switch 2739 * we need to consider it as a new CSA (possibly 2740 * to self). This happens by not returning here 2741 * so we'll get to the check below. 2742 */ 2743 break; 2744 } 2745 2746 /* link still has CSA but we already know, do nothing */ 2747 if (!res) 2748 return; 2749 2750 /* check in the RNR if the CSA aborted */ 2751 ieee80211_sta_other_link_csa_disappeared(link, 2752 full_elems); 2753 return; 2754 } 2755 } 2756 2757 /* no active CSA nor a new one */ 2758 if (res) { 2759 /* 2760 * However, we may have stopped queues when receiving a public 2761 * action frame that couldn't be protected, if it had the quiet 2762 * bit set. This is a trade-off, we want to be quiet as soon as 2763 * possible, but also don't trust the public action frame much, 2764 * as it can't be protected. 2765 */ 2766 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2767 link->u.mgd.csa.blocked_tx = false; 2768 ieee80211_vif_unblock_queues_csa(sdata); 2769 } 2770 return; 2771 } 2772 2773 /* 2774 * We don't really trust public action frames, but block queues (go to 2775 * quiet mode) for them anyway, we should get a beacon soon to either 2776 * know what the CSA really is, or figure out the public action frame 2777 * was actually an attack. 2778 */ 2779 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2780 if (csa_ie.mode) { 2781 link->u.mgd.csa.blocked_tx = true; 2782 ieee80211_vif_block_queues_csa(sdata); 2783 } 2784 return; 2785 } 2786 2787 if (link->conf->chanreq.oper.chan->band != 2788 csa_ie.chanreq.oper.chan->band) { 2789 link_info(link, 2790 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2791 link->u.mgd.bssid, 2792 csa_ie.chanreq.oper.chan->center_freq, 2793 csa_ie.chanreq.oper.width, 2794 csa_ie.chanreq.oper.center_freq1, 2795 csa_ie.chanreq.oper.center_freq2); 2796 goto drop_connection; 2797 } 2798 2799 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2800 IEEE80211_CHAN_DISABLED)) { 2801 link_info(link, 2802 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2803 link->u.mgd.bssid, 2804 csa_ie.chanreq.oper.chan->center_freq, 2805 csa_ie.chanreq.oper.chan->freq_offset, 2806 csa_ie.chanreq.oper.width, 2807 csa_ie.chanreq.oper.center_freq1, 2808 csa_ie.chanreq.oper.freq1_offset, 2809 csa_ie.chanreq.oper.center_freq2); 2810 goto drop_connection; 2811 } 2812 2813 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2814 &link->conf->chanreq.oper) && 2815 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2816 if (link->u.mgd.csa.ignored_same_chan) 2817 return; 2818 link_info(link, 2819 "AP %pM tries to chanswitch to same channel, ignore\n", 2820 link->u.mgd.bssid); 2821 link->u.mgd.csa.ignored_same_chan = true; 2822 return; 2823 } 2824 2825 /* 2826 * Drop all TDLS peers on the affected link - either we disconnect or 2827 * move to a different channel from this point on. There's no telling 2828 * what our peer will do. 2829 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2830 * have an incompatible wider chandef. 2831 */ 2832 ieee80211_teardown_tdls_peers(link); 2833 2834 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2835 lockdep_is_held(&local->hw.wiphy->mtx)); 2836 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2837 link_info(link, 2838 "no channel context assigned to vif?, disconnecting\n"); 2839 goto drop_connection; 2840 } 2841 2842 if (conf) 2843 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2844 2845 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2846 link_info(link, 2847 "driver doesn't support chan-switch with channel contexts\n"); 2848 goto drop_connection; 2849 } 2850 2851 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2852 link_info(link, 2853 "preparing for channel switch failed, disconnecting\n"); 2854 goto drop_connection; 2855 } 2856 2857 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2858 2859 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2860 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2861 &csa_ie.chanreq.ap); 2862 2863 if (chanctx) { 2864 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2865 chanctx->mode, false); 2866 if (res) { 2867 link_info(link, 2868 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2869 res); 2870 goto drop_connection; 2871 } 2872 } 2873 2874 link->conf->csa_active = true; 2875 link->u.mgd.csa.ignored_same_chan = false; 2876 link->u.mgd.beacon_crc_valid = false; 2877 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2878 2879 if (csa_ie.mode) 2880 ieee80211_vif_block_queues_csa(sdata); 2881 2882 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2883 link->link_id, csa_ie.count, 2884 csa_ie.mode); 2885 2886 /* we may have to handle timeout for deactivated link in software */ 2887 now = jiffies; 2888 link->u.mgd.csa.time = now + 2889 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2890 link->conf->beacon_int); 2891 2892 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2893 local->ops->channel_switch) { 2894 /* 2895 * Use driver's channel switch callback, the driver will 2896 * later call ieee80211_chswitch_done(). It may deactivate 2897 * the link as well, we handle that elsewhere and queue 2898 * the csa.switch_work for the calculated time then. 2899 */ 2900 drv_channel_switch(local, sdata, &ch_switch); 2901 return; 2902 } 2903 2904 /* channel switch handled in software */ 2905 wiphy_delayed_work_queue(local->hw.wiphy, 2906 &link->u.mgd.csa.switch_work, 2907 link->u.mgd.csa.time - now); 2908 return; 2909 drop_connection: 2910 /* 2911 * This is just so that the disconnect flow will know that 2912 * we were trying to switch channel and failed. In case the 2913 * mode is 1 (we are not allowed to Tx), we will know not to 2914 * send a deauthentication frame. Those two fields will be 2915 * reset when the disconnection worker runs. 2916 */ 2917 link->conf->csa_active = true; 2918 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2919 2920 wiphy_work_queue(sdata->local->hw.wiphy, 2921 &ifmgd->csa_connection_drop_work); 2922 } 2923 2924 struct sta_bss_param_ch_cnt_data { 2925 struct ieee80211_sub_if_data *sdata; 2926 u8 reporting_link_id; 2927 u8 mld_id; 2928 }; 2929 2930 static enum cfg80211_rnr_iter_ret 2931 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2932 const struct ieee80211_neighbor_ap_info *info, 2933 const u8 *tbtt_info, u8 tbtt_info_len) 2934 { 2935 struct sta_bss_param_ch_cnt_data *data = _data; 2936 struct ieee80211_sub_if_data *sdata = data->sdata; 2937 const struct ieee80211_tbtt_info_ge_11 *ti; 2938 u8 bss_param_ch_cnt; 2939 int link_id; 2940 2941 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2942 return RNR_ITER_CONTINUE; 2943 2944 if (tbtt_info_len < sizeof(*ti)) 2945 return RNR_ITER_CONTINUE; 2946 2947 ti = (const void *)tbtt_info; 2948 2949 if (ti->mld_params.mld_id != data->mld_id) 2950 return RNR_ITER_CONTINUE; 2951 2952 link_id = le16_get_bits(ti->mld_params.params, 2953 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2954 bss_param_ch_cnt = 2955 le16_get_bits(ti->mld_params.params, 2956 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 2957 2958 if (bss_param_ch_cnt != 255 && 2959 link_id < ARRAY_SIZE(sdata->link)) { 2960 struct ieee80211_link_data *link = 2961 sdata_dereference(sdata->link[link_id], sdata); 2962 2963 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 2964 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 2965 link->conf->bss_param_ch_cnt_link_id = 2966 data->reporting_link_id; 2967 } 2968 } 2969 2970 return RNR_ITER_CONTINUE; 2971 } 2972 2973 static void 2974 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 2975 struct ieee80211_bss_conf *bss_conf, 2976 struct ieee802_11_elems *elems) 2977 { 2978 struct sta_bss_param_ch_cnt_data data = { 2979 .reporting_link_id = bss_conf->link_id, 2980 .sdata = sdata, 2981 }; 2982 int bss_param_ch_cnt; 2983 2984 if (!elems->ml_basic) 2985 return; 2986 2987 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2988 2989 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2990 ieee80211_sta_bss_param_ch_cnt_iter, &data); 2991 2992 bss_param_ch_cnt = 2993 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 2994 2995 /* 2996 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 2997 * didn't change to indicate that we got a beacon on our own 2998 * link. 2999 */ 3000 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3001 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3002 bss_conf->bss_param_ch_cnt_link_id = 3003 bss_conf->link_id; 3004 } 3005 } 3006 3007 static bool 3008 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3009 const u8 *country_ie, u8 country_ie_len, 3010 const u8 *pwr_constr_elem, 3011 int *chan_pwr, int *pwr_reduction) 3012 { 3013 struct ieee80211_country_ie_triplet *triplet; 3014 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3015 int i, chan_increment; 3016 bool have_chan_pwr = false; 3017 3018 /* Invalid IE */ 3019 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3020 return false; 3021 3022 triplet = (void *)(country_ie + 3); 3023 country_ie_len -= 3; 3024 3025 switch (channel->band) { 3026 default: 3027 WARN_ON_ONCE(1); 3028 fallthrough; 3029 case NL80211_BAND_2GHZ: 3030 case NL80211_BAND_60GHZ: 3031 case NL80211_BAND_LC: 3032 chan_increment = 1; 3033 break; 3034 case NL80211_BAND_5GHZ: 3035 chan_increment = 4; 3036 break; 3037 case NL80211_BAND_6GHZ: 3038 /* 3039 * In the 6 GHz band, the "maximum transmit power level" 3040 * field in the triplets is reserved, and thus will be 3041 * zero and we shouldn't use it to control TX power. 3042 * The actual TX power will be given in the transmit 3043 * power envelope element instead. 3044 */ 3045 return false; 3046 } 3047 3048 /* find channel */ 3049 while (country_ie_len >= 3) { 3050 u8 first_channel = triplet->chans.first_channel; 3051 3052 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3053 goto next; 3054 3055 for (i = 0; i < triplet->chans.num_channels; i++) { 3056 if (first_channel + i * chan_increment == chan) { 3057 have_chan_pwr = true; 3058 *chan_pwr = triplet->chans.max_power; 3059 break; 3060 } 3061 } 3062 if (have_chan_pwr) 3063 break; 3064 3065 next: 3066 triplet++; 3067 country_ie_len -= 3; 3068 } 3069 3070 if (have_chan_pwr && pwr_constr_elem) 3071 *pwr_reduction = *pwr_constr_elem; 3072 else 3073 *pwr_reduction = 0; 3074 3075 return have_chan_pwr; 3076 } 3077 3078 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3079 const u8 *cisco_dtpc_ie, 3080 int *pwr_level) 3081 { 3082 /* From practical testing, the first data byte of the DTPC element 3083 * seems to contain the requested dBm level, and the CLI on Cisco 3084 * APs clearly state the range is -127 to 127 dBm, which indicates 3085 * a signed byte, although it seemingly never actually goes negative. 3086 * The other byte seems to always be zero. 3087 */ 3088 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3089 } 3090 3091 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3092 struct ieee80211_channel *channel, 3093 struct ieee80211_mgmt *mgmt, 3094 const u8 *country_ie, u8 country_ie_len, 3095 const u8 *pwr_constr_ie, 3096 const u8 *cisco_dtpc_ie) 3097 { 3098 struct ieee80211_sub_if_data *sdata = link->sdata; 3099 bool has_80211h_pwr = false, has_cisco_pwr = false; 3100 int chan_pwr = 0, pwr_reduction_80211h = 0; 3101 int pwr_level_cisco, pwr_level_80211h; 3102 int new_ap_level; 3103 __le16 capab = mgmt->u.probe_resp.capab_info; 3104 3105 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3106 return 0; /* TODO */ 3107 3108 if (country_ie && 3109 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3110 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3111 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3112 channel, country_ie, country_ie_len, 3113 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3114 pwr_level_80211h = 3115 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3116 } 3117 3118 if (cisco_dtpc_ie) { 3119 ieee80211_find_cisco_dtpc( 3120 channel, cisco_dtpc_ie, &pwr_level_cisco); 3121 has_cisco_pwr = true; 3122 } 3123 3124 if (!has_80211h_pwr && !has_cisco_pwr) 3125 return 0; 3126 3127 /* If we have both 802.11h and Cisco DTPC, apply both limits 3128 * by picking the smallest of the two power levels advertised. 3129 */ 3130 if (has_80211h_pwr && 3131 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3132 new_ap_level = pwr_level_80211h; 3133 3134 if (link->ap_power_level == new_ap_level) 3135 return 0; 3136 3137 sdata_dbg(sdata, 3138 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3139 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3140 link->u.mgd.bssid); 3141 } else { /* has_cisco_pwr is always true here. */ 3142 new_ap_level = pwr_level_cisco; 3143 3144 if (link->ap_power_level == new_ap_level) 3145 return 0; 3146 3147 sdata_dbg(sdata, 3148 "Limiting TX power to %d dBm as advertised by %pM\n", 3149 pwr_level_cisco, link->u.mgd.bssid); 3150 } 3151 3152 link->ap_power_level = new_ap_level; 3153 if (__ieee80211_recalc_txpower(link)) 3154 return BSS_CHANGED_TXPOWER; 3155 return 0; 3156 } 3157 3158 /* powersave */ 3159 static void ieee80211_enable_ps(struct ieee80211_local *local, 3160 struct ieee80211_sub_if_data *sdata) 3161 { 3162 struct ieee80211_conf *conf = &local->hw.conf; 3163 3164 /* 3165 * If we are scanning right now then the parameters will 3166 * take effect when scan finishes. 3167 */ 3168 if (local->scanning) 3169 return; 3170 3171 if (conf->dynamic_ps_timeout > 0 && 3172 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3173 mod_timer(&local->dynamic_ps_timer, jiffies + 3174 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3175 } else { 3176 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3177 ieee80211_send_nullfunc(local, sdata, true); 3178 3179 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3180 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3181 return; 3182 3183 conf->flags |= IEEE80211_CONF_PS; 3184 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3185 } 3186 } 3187 3188 static void ieee80211_change_ps(struct ieee80211_local *local) 3189 { 3190 struct ieee80211_conf *conf = &local->hw.conf; 3191 3192 if (local->ps_sdata) { 3193 ieee80211_enable_ps(local, local->ps_sdata); 3194 } else if (conf->flags & IEEE80211_CONF_PS) { 3195 conf->flags &= ~IEEE80211_CONF_PS; 3196 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3197 timer_delete_sync(&local->dynamic_ps_timer); 3198 wiphy_work_cancel(local->hw.wiphy, 3199 &local->dynamic_ps_enable_work); 3200 } 3201 } 3202 3203 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3204 { 3205 struct ieee80211_local *local = sdata->local; 3206 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3207 struct sta_info *sta = NULL; 3208 bool authorized = false; 3209 3210 if (!mgd->powersave) 3211 return false; 3212 3213 if (mgd->broken_ap) 3214 return false; 3215 3216 if (!mgd->associated) 3217 return false; 3218 3219 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3220 return false; 3221 3222 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3223 !sdata->deflink.u.mgd.have_beacon) 3224 return false; 3225 3226 rcu_read_lock(); 3227 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3228 if (sta) 3229 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3230 rcu_read_unlock(); 3231 3232 return authorized; 3233 } 3234 3235 /* need to hold RTNL or interface lock */ 3236 void ieee80211_recalc_ps(struct ieee80211_local *local) 3237 { 3238 struct ieee80211_sub_if_data *sdata, *found = NULL; 3239 int count = 0; 3240 int timeout; 3241 3242 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3243 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3244 local->ps_sdata = NULL; 3245 return; 3246 } 3247 3248 list_for_each_entry(sdata, &local->interfaces, list) { 3249 if (!ieee80211_sdata_running(sdata)) 3250 continue; 3251 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3252 /* If an AP vif is found, then disable PS 3253 * by setting the count to zero thereby setting 3254 * ps_sdata to NULL. 3255 */ 3256 count = 0; 3257 break; 3258 } 3259 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3260 continue; 3261 found = sdata; 3262 count++; 3263 } 3264 3265 if (count == 1 && ieee80211_powersave_allowed(found)) { 3266 u8 dtimper = found->deflink.u.mgd.dtim_period; 3267 3268 timeout = local->dynamic_ps_forced_timeout; 3269 if (timeout < 0) 3270 timeout = 100; 3271 local->hw.conf.dynamic_ps_timeout = timeout; 3272 3273 /* If the TIM IE is invalid, pretend the value is 1 */ 3274 if (!dtimper) 3275 dtimper = 1; 3276 3277 local->hw.conf.ps_dtim_period = dtimper; 3278 local->ps_sdata = found; 3279 } else { 3280 local->ps_sdata = NULL; 3281 } 3282 3283 ieee80211_change_ps(local); 3284 } 3285 3286 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3287 { 3288 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3289 3290 if (sdata->vif.cfg.ps != ps_allowed) { 3291 sdata->vif.cfg.ps = ps_allowed; 3292 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3293 } 3294 } 3295 3296 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3297 struct wiphy_work *work) 3298 { 3299 struct ieee80211_local *local = 3300 container_of(work, struct ieee80211_local, 3301 dynamic_ps_disable_work); 3302 3303 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3304 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3305 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3306 } 3307 3308 ieee80211_wake_queues_by_reason(&local->hw, 3309 IEEE80211_MAX_QUEUE_MAP, 3310 IEEE80211_QUEUE_STOP_REASON_PS, 3311 false); 3312 } 3313 3314 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3315 struct wiphy_work *work) 3316 { 3317 struct ieee80211_local *local = 3318 container_of(work, struct ieee80211_local, 3319 dynamic_ps_enable_work); 3320 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3321 struct ieee80211_if_managed *ifmgd; 3322 unsigned long flags; 3323 int q; 3324 3325 /* can only happen when PS was just disabled anyway */ 3326 if (!sdata) 3327 return; 3328 3329 ifmgd = &sdata->u.mgd; 3330 3331 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3332 return; 3333 3334 if (local->hw.conf.dynamic_ps_timeout > 0) { 3335 /* don't enter PS if TX frames are pending */ 3336 if (drv_tx_frames_pending(local)) { 3337 mod_timer(&local->dynamic_ps_timer, jiffies + 3338 msecs_to_jiffies( 3339 local->hw.conf.dynamic_ps_timeout)); 3340 return; 3341 } 3342 3343 /* 3344 * transmission can be stopped by others which leads to 3345 * dynamic_ps_timer expiry. Postpone the ps timer if it 3346 * is not the actual idle state. 3347 */ 3348 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3349 for (q = 0; q < local->hw.queues; q++) { 3350 if (local->queue_stop_reasons[q]) { 3351 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3352 flags); 3353 mod_timer(&local->dynamic_ps_timer, jiffies + 3354 msecs_to_jiffies( 3355 local->hw.conf.dynamic_ps_timeout)); 3356 return; 3357 } 3358 } 3359 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3360 } 3361 3362 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3363 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3364 if (drv_tx_frames_pending(local)) { 3365 mod_timer(&local->dynamic_ps_timer, jiffies + 3366 msecs_to_jiffies( 3367 local->hw.conf.dynamic_ps_timeout)); 3368 } else { 3369 ieee80211_send_nullfunc(local, sdata, true); 3370 /* Flush to get the tx status of nullfunc frame */ 3371 ieee80211_flush_queues(local, sdata, false); 3372 } 3373 } 3374 3375 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3376 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3377 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3378 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3379 local->hw.conf.flags |= IEEE80211_CONF_PS; 3380 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3381 } 3382 } 3383 3384 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3385 { 3386 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3387 3388 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3389 } 3390 3391 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3392 { 3393 struct ieee80211_link_data *link = 3394 container_of(work, struct ieee80211_link_data, 3395 dfs_cac_timer_work.work); 3396 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3397 struct ieee80211_sub_if_data *sdata = link->sdata; 3398 3399 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3400 3401 if (sdata->wdev.links[link->link_id].cac_started) { 3402 ieee80211_link_release_channel(link); 3403 cfg80211_cac_event(sdata->dev, &chandef, 3404 NL80211_RADAR_CAC_FINISHED, 3405 GFP_KERNEL, link->link_id); 3406 } 3407 } 3408 3409 static bool 3410 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3411 { 3412 struct ieee80211_local *local = sdata->local; 3413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3414 bool ret = false; 3415 int ac; 3416 3417 if (local->hw.queues < IEEE80211_NUM_ACS) 3418 return false; 3419 3420 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3421 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3422 int non_acm_ac; 3423 unsigned long now = jiffies; 3424 3425 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3426 tx_tspec->admitted_time && 3427 time_after(now, tx_tspec->time_slice_start + HZ)) { 3428 tx_tspec->consumed_tx_time = 0; 3429 tx_tspec->time_slice_start = now; 3430 3431 if (tx_tspec->downgraded) 3432 tx_tspec->action = 3433 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3434 } 3435 3436 switch (tx_tspec->action) { 3437 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3438 /* take the original parameters */ 3439 if (drv_conf_tx(local, &sdata->deflink, ac, 3440 &sdata->deflink.tx_conf[ac])) 3441 link_err(&sdata->deflink, 3442 "failed to set TX queue parameters for queue %d\n", 3443 ac); 3444 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3445 tx_tspec->downgraded = false; 3446 ret = true; 3447 break; 3448 case TX_TSPEC_ACTION_DOWNGRADE: 3449 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3450 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3451 ret = true; 3452 break; 3453 } 3454 /* downgrade next lower non-ACM AC */ 3455 for (non_acm_ac = ac + 1; 3456 non_acm_ac < IEEE80211_NUM_ACS; 3457 non_acm_ac++) 3458 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3459 break; 3460 /* Usually the loop will result in using BK even if it 3461 * requires admission control, but such a configuration 3462 * makes no sense and we have to transmit somehow - the 3463 * AC selection does the same thing. 3464 * If we started out trying to downgrade from BK, then 3465 * the extra condition here might be needed. 3466 */ 3467 if (non_acm_ac >= IEEE80211_NUM_ACS) 3468 non_acm_ac = IEEE80211_AC_BK; 3469 if (drv_conf_tx(local, &sdata->deflink, ac, 3470 &sdata->deflink.tx_conf[non_acm_ac])) 3471 link_err(&sdata->deflink, 3472 "failed to set TX queue parameters for queue %d\n", 3473 ac); 3474 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3475 ret = true; 3476 wiphy_delayed_work_queue(local->hw.wiphy, 3477 &ifmgd->tx_tspec_wk, 3478 tx_tspec->time_slice_start + 3479 HZ - now + 1); 3480 break; 3481 case TX_TSPEC_ACTION_NONE: 3482 /* nothing now */ 3483 break; 3484 } 3485 } 3486 3487 return ret; 3488 } 3489 3490 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3491 { 3492 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3493 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3494 BSS_CHANGED_QOS); 3495 } 3496 3497 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3498 struct wiphy_work *work) 3499 { 3500 struct ieee80211_sub_if_data *sdata; 3501 3502 sdata = container_of(work, struct ieee80211_sub_if_data, 3503 u.mgd.tx_tspec_wk.work); 3504 ieee80211_sta_handle_tspec_ac_params(sdata); 3505 } 3506 3507 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3508 { 3509 struct ieee80211_sub_if_data *sdata = link->sdata; 3510 struct ieee80211_local *local = sdata->local; 3511 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3512 struct ieee80211_tx_queue_params *params = link->tx_conf; 3513 u8 ac; 3514 3515 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3516 mlme_dbg(sdata, 3517 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3518 ac, params[ac].acm, 3519 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3520 params[ac].txop, params[ac].uapsd, 3521 ifmgd->tx_tspec[ac].downgraded); 3522 if (!ifmgd->tx_tspec[ac].downgraded && 3523 drv_conf_tx(local, link, ac, ¶ms[ac])) 3524 link_err(link, 3525 "failed to set TX queue parameters for AC %d\n", 3526 ac); 3527 } 3528 } 3529 3530 /* MLME */ 3531 static bool 3532 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3533 struct ieee80211_link_data *link, 3534 const u8 *wmm_param, size_t wmm_param_len, 3535 const struct ieee80211_mu_edca_param_set *mu_edca) 3536 { 3537 struct ieee80211_sub_if_data *sdata = link->sdata; 3538 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3539 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3540 size_t left; 3541 int count, mu_edca_count, ac; 3542 const u8 *pos; 3543 u8 uapsd_queues = 0; 3544 3545 if (!local->ops->conf_tx) 3546 return false; 3547 3548 if (local->hw.queues < IEEE80211_NUM_ACS) 3549 return false; 3550 3551 if (!wmm_param) 3552 return false; 3553 3554 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3555 return false; 3556 3557 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3558 uapsd_queues = ifmgd->uapsd_queues; 3559 3560 count = wmm_param[6] & 0x0f; 3561 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3562 * if mu_edca was preset before and now it disappeared tell 3563 * the driver about it. 3564 */ 3565 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3566 if (count == link->u.mgd.wmm_last_param_set && 3567 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3568 return false; 3569 link->u.mgd.wmm_last_param_set = count; 3570 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3571 3572 pos = wmm_param + 8; 3573 left = wmm_param_len - 8; 3574 3575 memset(¶ms, 0, sizeof(params)); 3576 3577 sdata->wmm_acm = 0; 3578 for (; left >= 4; left -= 4, pos += 4) { 3579 int aci = (pos[0] >> 5) & 0x03; 3580 int acm = (pos[0] >> 4) & 0x01; 3581 bool uapsd = false; 3582 3583 switch (aci) { 3584 case 1: /* AC_BK */ 3585 ac = IEEE80211_AC_BK; 3586 if (acm) 3587 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3588 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3589 uapsd = true; 3590 params[ac].mu_edca = !!mu_edca; 3591 if (mu_edca) 3592 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3593 break; 3594 case 2: /* AC_VI */ 3595 ac = IEEE80211_AC_VI; 3596 if (acm) 3597 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3598 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3599 uapsd = true; 3600 params[ac].mu_edca = !!mu_edca; 3601 if (mu_edca) 3602 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3603 break; 3604 case 3: /* AC_VO */ 3605 ac = IEEE80211_AC_VO; 3606 if (acm) 3607 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3608 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3609 uapsd = true; 3610 params[ac].mu_edca = !!mu_edca; 3611 if (mu_edca) 3612 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3613 break; 3614 case 0: /* AC_BE */ 3615 default: 3616 ac = IEEE80211_AC_BE; 3617 if (acm) 3618 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3619 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3620 uapsd = true; 3621 params[ac].mu_edca = !!mu_edca; 3622 if (mu_edca) 3623 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3624 break; 3625 } 3626 3627 params[ac].aifs = pos[0] & 0x0f; 3628 3629 if (params[ac].aifs < 2) { 3630 link_info(link, 3631 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3632 params[ac].aifs, aci); 3633 params[ac].aifs = 2; 3634 } 3635 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3636 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3637 params[ac].txop = get_unaligned_le16(pos + 2); 3638 params[ac].acm = acm; 3639 params[ac].uapsd = uapsd; 3640 3641 if (params[ac].cw_min == 0 || 3642 params[ac].cw_min > params[ac].cw_max) { 3643 link_info(link, 3644 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3645 params[ac].cw_min, params[ac].cw_max, aci); 3646 return false; 3647 } 3648 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3649 } 3650 3651 /* WMM specification requires all 4 ACIs. */ 3652 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3653 if (params[ac].cw_min == 0) { 3654 link_info(link, 3655 "AP has invalid WMM params (missing AC %d), using defaults\n", 3656 ac); 3657 return false; 3658 } 3659 } 3660 3661 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3662 link->tx_conf[ac] = params[ac]; 3663 3664 return true; 3665 } 3666 3667 static bool 3668 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3669 struct ieee80211_link_data *link, 3670 const u8 *wmm_param, size_t wmm_param_len, 3671 const struct ieee80211_mu_edca_param_set *mu_edca) 3672 { 3673 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3674 mu_edca)) 3675 return false; 3676 3677 ieee80211_mgd_set_link_qos_params(link); 3678 3679 /* enable WMM or activate new settings */ 3680 link->conf->qos = true; 3681 return true; 3682 } 3683 3684 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3685 { 3686 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3687 3688 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3689 ieee80211_run_deferred_scan(sdata->local); 3690 } 3691 3692 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3693 { 3694 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3695 3696 __ieee80211_stop_poll(sdata); 3697 } 3698 3699 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3700 u16 capab, bool erp_valid, u8 erp) 3701 { 3702 struct ieee80211_bss_conf *bss_conf = link->conf; 3703 struct ieee80211_supported_band *sband; 3704 u64 changed = 0; 3705 bool use_protection; 3706 bool use_short_preamble; 3707 bool use_short_slot; 3708 3709 sband = ieee80211_get_link_sband(link); 3710 if (!sband) 3711 return changed; 3712 3713 if (erp_valid) { 3714 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3715 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3716 } else { 3717 use_protection = false; 3718 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3719 } 3720 3721 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3722 if (sband->band == NL80211_BAND_5GHZ || 3723 sband->band == NL80211_BAND_6GHZ) 3724 use_short_slot = true; 3725 3726 if (use_protection != bss_conf->use_cts_prot) { 3727 bss_conf->use_cts_prot = use_protection; 3728 changed |= BSS_CHANGED_ERP_CTS_PROT; 3729 } 3730 3731 if (use_short_preamble != bss_conf->use_short_preamble) { 3732 bss_conf->use_short_preamble = use_short_preamble; 3733 changed |= BSS_CHANGED_ERP_PREAMBLE; 3734 } 3735 3736 if (use_short_slot != bss_conf->use_short_slot) { 3737 bss_conf->use_short_slot = use_short_slot; 3738 changed |= BSS_CHANGED_ERP_SLOT; 3739 } 3740 3741 return changed; 3742 } 3743 3744 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3745 struct cfg80211_bss *cbss) 3746 { 3747 struct ieee80211_sub_if_data *sdata = link->sdata; 3748 struct ieee80211_bss_conf *bss_conf = link->conf; 3749 struct ieee80211_bss *bss = (void *)cbss->priv; 3750 u64 changed = BSS_CHANGED_QOS; 3751 3752 /* not really used in MLO */ 3753 sdata->u.mgd.beacon_timeout = 3754 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3755 bss_conf->beacon_int)); 3756 3757 changed |= ieee80211_handle_bss_capability(link, 3758 bss_conf->assoc_capability, 3759 bss->has_erp_value, 3760 bss->erp_value); 3761 3762 ieee80211_check_rate_mask(link); 3763 3764 link->conf->bss = cbss; 3765 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3766 3767 if (sdata->vif.p2p || 3768 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3769 const struct cfg80211_bss_ies *ies; 3770 3771 rcu_read_lock(); 3772 ies = rcu_dereference(cbss->ies); 3773 if (ies) { 3774 int ret; 3775 3776 ret = cfg80211_get_p2p_attr( 3777 ies->data, ies->len, 3778 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3779 (u8 *) &bss_conf->p2p_noa_attr, 3780 sizeof(bss_conf->p2p_noa_attr)); 3781 if (ret >= 2) { 3782 link->u.mgd.p2p_noa_index = 3783 bss_conf->p2p_noa_attr.index; 3784 changed |= BSS_CHANGED_P2P_PS; 3785 } 3786 } 3787 rcu_read_unlock(); 3788 } 3789 3790 if (link->u.mgd.have_beacon) { 3791 bss_conf->beacon_rate = bss->beacon_rate; 3792 changed |= BSS_CHANGED_BEACON_INFO; 3793 } else { 3794 bss_conf->beacon_rate = NULL; 3795 } 3796 3797 /* Tell the driver to monitor connection quality (if supported) */ 3798 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3799 bss_conf->cqm_rssi_thold) 3800 changed |= BSS_CHANGED_CQM; 3801 3802 return changed; 3803 } 3804 3805 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3806 struct ieee80211_mgd_assoc_data *assoc_data, 3807 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3808 { 3809 struct ieee80211_local *local = sdata->local; 3810 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3811 u64 vif_changed = BSS_CHANGED_ASSOC; 3812 unsigned int link_id; 3813 3814 lockdep_assert_wiphy(local->hw.wiphy); 3815 3816 sdata->u.mgd.associated = true; 3817 3818 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3819 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3820 struct ieee80211_link_data *link; 3821 3822 if (!cbss || 3823 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3824 continue; 3825 3826 if (ieee80211_vif_is_mld(&sdata->vif) && 3827 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3828 continue; 3829 3830 link = sdata_dereference(sdata->link[link_id], sdata); 3831 if (WARN_ON(!link)) 3832 return; 3833 3834 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3835 } 3836 3837 /* just to be sure */ 3838 ieee80211_stop_poll(sdata); 3839 3840 ieee80211_led_assoc(local, 1); 3841 3842 vif_cfg->assoc = 1; 3843 3844 /* Enable ARP filtering */ 3845 if (vif_cfg->arp_addr_cnt) 3846 vif_changed |= BSS_CHANGED_ARP_FILTER; 3847 3848 if (ieee80211_vif_is_mld(&sdata->vif)) { 3849 for (link_id = 0; 3850 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3851 link_id++) { 3852 struct ieee80211_link_data *link; 3853 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3854 3855 if (!cbss || 3856 !(BIT(link_id) & 3857 ieee80211_vif_usable_links(&sdata->vif)) || 3858 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3859 continue; 3860 3861 link = sdata_dereference(sdata->link[link_id], sdata); 3862 if (WARN_ON(!link)) 3863 return; 3864 3865 ieee80211_link_info_change_notify(sdata, link, 3866 changed[link_id]); 3867 3868 ieee80211_recalc_smps(sdata, link); 3869 } 3870 3871 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3872 } else { 3873 ieee80211_bss_info_change_notify(sdata, 3874 vif_changed | changed[0]); 3875 } 3876 3877 ieee80211_recalc_ps(local); 3878 3879 /* leave this here to not change ordering in non-MLO cases */ 3880 if (!ieee80211_vif_is_mld(&sdata->vif)) 3881 ieee80211_recalc_smps(sdata, &sdata->deflink); 3882 ieee80211_recalc_ps_vif(sdata); 3883 3884 netif_carrier_on(sdata->dev); 3885 } 3886 3887 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3888 { 3889 struct ieee80211_mgd_assoc_data *add_links_data = 3890 sdata->u.mgd.reconf.add_links_data; 3891 3892 if (!ieee80211_vif_is_mld(&sdata->vif) || 3893 !(sdata->u.mgd.reconf.added_links | 3894 sdata->u.mgd.reconf.removed_links)) 3895 return; 3896 3897 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3898 &sdata->u.mgd.reconf.wk); 3899 sdata->u.mgd.reconf.added_links = 0; 3900 sdata->u.mgd.reconf.removed_links = 0; 3901 sdata->u.mgd.reconf.dialog_token = 0; 3902 3903 if (add_links_data) { 3904 struct cfg80211_mlo_reconf_done_data done_data = {}; 3905 u8 link_id; 3906 3907 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3908 link_id++) 3909 done_data.links[link_id].bss = 3910 add_links_data->link[link_id].bss; 3911 3912 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 3913 3914 kfree(sdata->u.mgd.reconf.add_links_data); 3915 sdata->u.mgd.reconf.add_links_data = NULL; 3916 } 3917 } 3918 3919 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3920 u16 stype, u16 reason, bool tx, 3921 u8 *frame_buf) 3922 { 3923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3924 struct ieee80211_local *local = sdata->local; 3925 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3926 unsigned int link_id; 3927 u64 changed = 0; 3928 struct ieee80211_prep_tx_info info = { 3929 .subtype = stype, 3930 .was_assoc = true, 3931 .link_id = ffs(sdata->vif.active_links) - 1, 3932 }; 3933 3934 lockdep_assert_wiphy(local->hw.wiphy); 3935 3936 if (WARN_ON(!ap_sta)) 3937 return; 3938 3939 if (WARN_ON_ONCE(tx && !frame_buf)) 3940 return; 3941 3942 if (WARN_ON(!ifmgd->associated)) 3943 return; 3944 3945 ieee80211_stop_poll(sdata); 3946 3947 ifmgd->associated = false; 3948 3949 if (tx) { 3950 bool tx_link_found = false; 3951 3952 for (link_id = 0; 3953 link_id < ARRAY_SIZE(sdata->link); 3954 link_id++) { 3955 struct ieee80211_link_data *link; 3956 3957 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 3958 continue; 3959 3960 link = sdata_dereference(sdata->link[link_id], sdata); 3961 if (WARN_ON_ONCE(!link)) 3962 continue; 3963 3964 if (link->u.mgd.csa.blocked_tx) 3965 continue; 3966 3967 tx_link_found = true; 3968 break; 3969 } 3970 3971 tx = tx_link_found; 3972 } 3973 3974 /* other links will be destroyed */ 3975 sdata->deflink.conf->bss = NULL; 3976 sdata->deflink.conf->epcs_support = false; 3977 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3978 3979 netif_carrier_off(sdata->dev); 3980 3981 /* 3982 * if we want to get out of ps before disassoc (why?) we have 3983 * to do it before sending disassoc, as otherwise the null-packet 3984 * won't be valid. 3985 */ 3986 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3987 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3988 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3989 } 3990 local->ps_sdata = NULL; 3991 3992 /* disable per-vif ps */ 3993 ieee80211_recalc_ps_vif(sdata); 3994 3995 /* make sure ongoing transmission finishes */ 3996 synchronize_net(); 3997 3998 /* 3999 * drop any frame before deauth/disassoc, this can be data or 4000 * management frame. Since we are disconnecting, we should not 4001 * insist sending these frames which can take time and delay 4002 * the disconnection and possible the roaming. 4003 */ 4004 ieee80211_flush_queues(local, sdata, true); 4005 4006 if (tx) { 4007 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4008 4009 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4010 sdata->vif.cfg.ap_addr, stype, 4011 reason, true, frame_buf); 4012 4013 /* flush out frame - make sure the deauth was actually sent */ 4014 ieee80211_flush_queues(local, sdata, false); 4015 4016 drv_mgd_complete_tx(sdata->local, sdata, &info); 4017 } else if (frame_buf) { 4018 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4019 sdata->vif.cfg.ap_addr, stype, 4020 reason, false, frame_buf); 4021 } 4022 4023 /* clear AP addr only after building the needed mgmt frames */ 4024 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4025 eth_zero_addr(sdata->vif.cfg.ap_addr); 4026 4027 sdata->vif.cfg.ssid_len = 0; 4028 4029 /* Remove TDLS peers */ 4030 __sta_info_flush(sdata, false, -1, ap_sta); 4031 4032 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4033 /* Only move the AP state */ 4034 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4035 } else { 4036 /* Remove AP peer */ 4037 sta_info_flush(sdata, -1); 4038 } 4039 4040 /* finally reset all BSS / config parameters */ 4041 if (!ieee80211_vif_is_mld(&sdata->vif)) 4042 changed |= ieee80211_reset_erp_info(sdata); 4043 4044 ieee80211_led_assoc(local, 0); 4045 changed |= BSS_CHANGED_ASSOC; 4046 sdata->vif.cfg.assoc = false; 4047 4048 sdata->deflink.u.mgd.p2p_noa_index = -1; 4049 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4050 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4051 4052 /* on the next assoc, re-program HT/VHT parameters */ 4053 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4054 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4055 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4056 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4057 4058 /* 4059 * reset MU-MIMO ownership and group data in default link, 4060 * if used, other links are destroyed 4061 */ 4062 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4063 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4064 memset(sdata->vif.bss_conf.mu_group.position, 0, 4065 sizeof(sdata->vif.bss_conf.mu_group.position)); 4066 if (!ieee80211_vif_is_mld(&sdata->vif)) 4067 changed |= BSS_CHANGED_MU_GROUPS; 4068 sdata->vif.bss_conf.mu_mimo_owner = false; 4069 4070 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4071 4072 timer_delete_sync(&local->dynamic_ps_timer); 4073 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4074 4075 /* Disable ARP filtering */ 4076 if (sdata->vif.cfg.arp_addr_cnt) 4077 changed |= BSS_CHANGED_ARP_FILTER; 4078 4079 sdata->vif.bss_conf.qos = false; 4080 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4081 changed |= BSS_CHANGED_QOS; 4082 /* The BSSID (not really interesting) and HT changed */ 4083 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4084 ieee80211_bss_info_change_notify(sdata, changed); 4085 } else { 4086 ieee80211_vif_cfg_change_notify(sdata, changed); 4087 } 4088 4089 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4090 /* 4091 * After notifying the driver about the disassoc, 4092 * remove the ap sta. 4093 */ 4094 sta_info_flush(sdata, -1); 4095 } 4096 4097 /* disassociated - set to defaults now */ 4098 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4099 4100 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4101 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4102 timer_delete_sync(&sdata->u.mgd.timer); 4103 4104 sdata->vif.bss_conf.dtim_period = 0; 4105 sdata->vif.bss_conf.beacon_rate = NULL; 4106 4107 sdata->deflink.u.mgd.have_beacon = false; 4108 sdata->deflink.u.mgd.tracking_signal_avg = false; 4109 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4110 4111 ifmgd->flags = 0; 4112 4113 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4114 struct ieee80211_link_data *link; 4115 4116 link = sdata_dereference(sdata->link[link_id], sdata); 4117 if (!link) 4118 continue; 4119 ieee80211_link_release_channel(link); 4120 } 4121 4122 sdata->vif.bss_conf.csa_active = false; 4123 sdata->deflink.u.mgd.csa.blocked_tx = false; 4124 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4125 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4126 ieee80211_vif_unblock_queues_csa(sdata); 4127 4128 /* existing TX TSPEC sessions no longer exist */ 4129 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4130 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4131 4132 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4133 sdata->vif.bss_conf.pwr_reduction = 0; 4134 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4135 4136 sdata->vif.cfg.eml_cap = 0; 4137 sdata->vif.cfg.eml_med_sync_delay = 0; 4138 sdata->vif.cfg.mld_capa_op = 0; 4139 4140 memset(&sdata->u.mgd.ttlm_info, 0, 4141 sizeof(sdata->u.mgd.ttlm_info)); 4142 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4143 4144 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4145 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4146 &ifmgd->neg_ttlm_timeout_work); 4147 4148 sdata->u.mgd.removed_links = 0; 4149 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4150 &sdata->u.mgd.ml_reconf_work); 4151 4152 wiphy_work_cancel(sdata->local->hw.wiphy, 4153 &ifmgd->teardown_ttlm_work); 4154 4155 /* if disconnection happens in the middle of the ML reconfiguration 4156 * flow, cfg80211 must called to release the BSS references obtained 4157 * when the flow started. 4158 */ 4159 ieee80211_ml_reconf_reset(sdata); 4160 4161 ieee80211_vif_set_links(sdata, 0, 0); 4162 4163 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4164 4165 ifmgd->epcs.enabled = false; 4166 ifmgd->epcs.dialog_token = 0; 4167 4168 memset(ifmgd->userspace_selectors, 0, 4169 sizeof(ifmgd->userspace_selectors)); 4170 } 4171 4172 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4173 { 4174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4175 struct ieee80211_local *local = sdata->local; 4176 4177 lockdep_assert_wiphy(local->hw.wiphy); 4178 4179 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4180 return; 4181 4182 __ieee80211_stop_poll(sdata); 4183 4184 ieee80211_recalc_ps(local); 4185 4186 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4187 return; 4188 4189 /* 4190 * We've received a probe response, but are not sure whether 4191 * we have or will be receiving any beacons or data, so let's 4192 * schedule the timers again, just in case. 4193 */ 4194 ieee80211_sta_reset_beacon_monitor(sdata); 4195 4196 mod_timer(&ifmgd->conn_mon_timer, 4197 round_jiffies_up(jiffies + 4198 IEEE80211_CONNECTION_IDLE_TIME)); 4199 } 4200 4201 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4202 struct ieee80211_hdr *hdr, 4203 u16 tx_time) 4204 { 4205 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4206 u16 tid; 4207 int ac; 4208 struct ieee80211_sta_tx_tspec *tx_tspec; 4209 unsigned long now = jiffies; 4210 4211 if (!ieee80211_is_data_qos(hdr->frame_control)) 4212 return; 4213 4214 tid = ieee80211_get_tid(hdr); 4215 ac = ieee80211_ac_from_tid(tid); 4216 tx_tspec = &ifmgd->tx_tspec[ac]; 4217 4218 if (likely(!tx_tspec->admitted_time)) 4219 return; 4220 4221 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4222 tx_tspec->consumed_tx_time = 0; 4223 tx_tspec->time_slice_start = now; 4224 4225 if (tx_tspec->downgraded) { 4226 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4227 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4228 &ifmgd->tx_tspec_wk, 0); 4229 } 4230 } 4231 4232 if (tx_tspec->downgraded) 4233 return; 4234 4235 tx_tspec->consumed_tx_time += tx_time; 4236 4237 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4238 tx_tspec->downgraded = true; 4239 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4240 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4241 &ifmgd->tx_tspec_wk, 0); 4242 } 4243 } 4244 4245 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4246 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4247 { 4248 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4249 4250 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4251 !sdata->u.mgd.probe_send_count) 4252 return; 4253 4254 if (ack) 4255 sdata->u.mgd.probe_send_count = 0; 4256 else 4257 sdata->u.mgd.nullfunc_failed = true; 4258 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4259 } 4260 4261 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4262 const u8 *src, const u8 *dst, 4263 const u8 *ssid, size_t ssid_len, 4264 struct ieee80211_channel *channel) 4265 { 4266 struct sk_buff *skb; 4267 4268 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4269 ssid, ssid_len, NULL, 0, 4270 IEEE80211_PROBE_FLAG_DIRECTED); 4271 if (skb) 4272 ieee80211_tx_skb(sdata, skb); 4273 } 4274 4275 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4276 { 4277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4278 u8 *dst = sdata->vif.cfg.ap_addr; 4279 u8 unicast_limit = max(1, max_probe_tries - 3); 4280 struct sta_info *sta; 4281 4282 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4283 4284 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 4285 return; 4286 4287 /* 4288 * Try sending broadcast probe requests for the last three 4289 * probe requests after the first ones failed since some 4290 * buggy APs only support broadcast probe requests. 4291 */ 4292 if (ifmgd->probe_send_count >= unicast_limit) 4293 dst = NULL; 4294 4295 /* 4296 * When the hardware reports an accurate Tx ACK status, it's 4297 * better to send a nullfunc frame instead of a probe request, 4298 * as it will kick us off the AP quickly if we aren't associated 4299 * anymore. The timeout will be reset if the frame is ACKed by 4300 * the AP. 4301 */ 4302 ifmgd->probe_send_count++; 4303 4304 if (dst) { 4305 sta = sta_info_get(sdata, dst); 4306 if (!WARN_ON(!sta)) 4307 ieee80211_check_fast_rx(sta); 4308 } 4309 4310 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4311 ifmgd->nullfunc_failed = false; 4312 ieee80211_send_nullfunc(sdata->local, sdata, false); 4313 } else { 4314 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4315 sdata->vif.cfg.ssid, 4316 sdata->vif.cfg.ssid_len, 4317 sdata->deflink.conf->bss->channel); 4318 } 4319 4320 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4321 run_again(sdata, ifmgd->probe_timeout); 4322 } 4323 4324 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4325 bool beacon) 4326 { 4327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4328 bool already = false; 4329 4330 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4331 4332 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 4333 return; 4334 4335 if (!ieee80211_sdata_running(sdata)) 4336 return; 4337 4338 if (!ifmgd->associated) 4339 return; 4340 4341 if (sdata->local->tmp_channel || sdata->local->scanning) 4342 return; 4343 4344 if (sdata->local->suspending) { 4345 /* reschedule after resume */ 4346 ieee80211_reset_ap_probe(sdata); 4347 return; 4348 } 4349 4350 if (beacon) { 4351 mlme_dbg_ratelimited(sdata, 4352 "detected beacon loss from AP (missed %d beacons) - probing\n", 4353 beacon_loss_count); 4354 4355 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4356 } 4357 4358 /* 4359 * The driver/our work has already reported this event or the 4360 * connection monitoring has kicked in and we have already sent 4361 * a probe request. Or maybe the AP died and the driver keeps 4362 * reporting until we disassociate... 4363 * 4364 * In either case we have to ignore the current call to this 4365 * function (except for setting the correct probe reason bit) 4366 * because otherwise we would reset the timer every time and 4367 * never check whether we received a probe response! 4368 */ 4369 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4370 already = true; 4371 4372 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4373 4374 if (already) 4375 return; 4376 4377 ieee80211_recalc_ps(sdata->local); 4378 4379 ifmgd->probe_send_count = 0; 4380 ieee80211_mgd_probe_ap_send(sdata); 4381 } 4382 4383 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4384 struct ieee80211_vif *vif) 4385 { 4386 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4387 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4388 struct cfg80211_bss *cbss; 4389 struct sk_buff *skb; 4390 const struct element *ssid; 4391 int ssid_len; 4392 4393 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4394 4395 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4396 ieee80211_vif_is_mld(&sdata->vif))) 4397 return NULL; 4398 4399 if (ifmgd->associated) 4400 cbss = sdata->deflink.conf->bss; 4401 else if (ifmgd->auth_data) 4402 cbss = ifmgd->auth_data->bss; 4403 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4404 cbss = ifmgd->assoc_data->link[0].bss; 4405 else 4406 return NULL; 4407 4408 rcu_read_lock(); 4409 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4410 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4411 "invalid SSID element (len=%d)", 4412 ssid ? ssid->datalen : -1)) 4413 ssid_len = 0; 4414 else 4415 ssid_len = ssid->datalen; 4416 4417 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4418 (u32) -1, cbss->channel, 4419 ssid->data, ssid_len, 4420 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4421 rcu_read_unlock(); 4422 4423 return skb; 4424 } 4425 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4426 4427 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4428 const u8 *buf, size_t len, bool tx, 4429 u16 reason, bool reconnect) 4430 { 4431 struct ieee80211_event event = { 4432 .type = MLME_EVENT, 4433 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4434 .u.mlme.reason = reason, 4435 }; 4436 4437 if (tx) 4438 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4439 else 4440 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4441 4442 drv_event_callback(sdata->local, sdata, &event); 4443 } 4444 4445 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4446 { 4447 struct ieee80211_local *local = sdata->local; 4448 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4449 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4450 4451 lockdep_assert_wiphy(local->hw.wiphy); 4452 4453 if (!ifmgd->associated) 4454 return; 4455 4456 if (!ifmgd->driver_disconnect) { 4457 unsigned int link_id; 4458 4459 /* 4460 * AP is probably out of range (or not reachable for another 4461 * reason) so remove the bss structs for that AP. In the case 4462 * of multi-link, it's not clear that all of them really are 4463 * out of range, but if they weren't the driver likely would 4464 * have switched to just have a single link active? 4465 */ 4466 for (link_id = 0; 4467 link_id < ARRAY_SIZE(sdata->link); 4468 link_id++) { 4469 struct ieee80211_link_data *link; 4470 4471 link = sdata_dereference(sdata->link[link_id], sdata); 4472 if (!link || !link->conf->bss) 4473 continue; 4474 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4475 link->conf->bss = NULL; 4476 } 4477 } 4478 4479 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4480 ifmgd->driver_disconnect ? 4481 WLAN_REASON_DEAUTH_LEAVING : 4482 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4483 true, frame_buf); 4484 /* the other links will be destroyed */ 4485 sdata->vif.bss_conf.csa_active = false; 4486 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4487 sdata->deflink.u.mgd.csa.blocked_tx = false; 4488 ieee80211_vif_unblock_queues_csa(sdata); 4489 4490 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4491 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4492 ifmgd->reconnect); 4493 ifmgd->reconnect = false; 4494 } 4495 4496 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4497 struct wiphy_work *work) 4498 { 4499 struct ieee80211_sub_if_data *sdata = 4500 container_of(work, struct ieee80211_sub_if_data, 4501 u.mgd.beacon_connection_loss_work); 4502 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4503 4504 if (ifmgd->connection_loss) { 4505 sdata_info(sdata, "Connection to AP %pM lost\n", 4506 sdata->vif.cfg.ap_addr); 4507 __ieee80211_disconnect(sdata); 4508 ifmgd->connection_loss = false; 4509 } else if (ifmgd->driver_disconnect) { 4510 sdata_info(sdata, 4511 "Driver requested disconnection from AP %pM\n", 4512 sdata->vif.cfg.ap_addr); 4513 __ieee80211_disconnect(sdata); 4514 ifmgd->driver_disconnect = false; 4515 } else { 4516 if (ifmgd->associated) 4517 sdata->deflink.u.mgd.beacon_loss_count++; 4518 ieee80211_mgd_probe_ap(sdata, true); 4519 } 4520 } 4521 4522 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4523 struct wiphy_work *work) 4524 { 4525 struct ieee80211_sub_if_data *sdata = 4526 container_of(work, struct ieee80211_sub_if_data, 4527 u.mgd.csa_connection_drop_work); 4528 4529 __ieee80211_disconnect(sdata); 4530 } 4531 4532 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4533 { 4534 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4535 struct ieee80211_hw *hw = &sdata->local->hw; 4536 4537 trace_api_beacon_loss(sdata); 4538 4539 sdata->u.mgd.connection_loss = false; 4540 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4541 } 4542 EXPORT_SYMBOL(ieee80211_beacon_loss); 4543 4544 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4545 { 4546 struct ieee80211_sub_if_data *sdata; 4547 struct ieee80211_hw *hw; 4548 4549 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4550 4551 sdata = vif_to_sdata(vif); 4552 hw = &sdata->local->hw; 4553 4554 trace_api_connection_loss(sdata); 4555 4556 sdata->u.mgd.connection_loss = true; 4557 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4558 } 4559 EXPORT_SYMBOL(ieee80211_connection_loss); 4560 4561 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4562 { 4563 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4564 struct ieee80211_hw *hw = &sdata->local->hw; 4565 4566 trace_api_disconnect(sdata, reconnect); 4567 4568 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4569 return; 4570 4571 sdata->u.mgd.driver_disconnect = true; 4572 sdata->u.mgd.reconnect = reconnect; 4573 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4574 } 4575 EXPORT_SYMBOL(ieee80211_disconnect); 4576 4577 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4578 bool assoc) 4579 { 4580 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4581 4582 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4583 4584 sdata->u.mgd.auth_data = NULL; 4585 4586 if (!assoc) { 4587 /* 4588 * we are not authenticated yet, the only timer that could be 4589 * running is the timeout for the authentication response which 4590 * which is not relevant anymore. 4591 */ 4592 timer_delete_sync(&sdata->u.mgd.timer); 4593 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4594 4595 /* other links are destroyed */ 4596 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4597 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4598 BSS_CHANGED_BSSID); 4599 sdata->u.mgd.flags = 0; 4600 4601 ieee80211_link_release_channel(&sdata->deflink); 4602 ieee80211_vif_set_links(sdata, 0, 0); 4603 } 4604 4605 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4606 kfree(auth_data); 4607 } 4608 4609 enum assoc_status { 4610 ASSOC_SUCCESS, 4611 ASSOC_REJECTED, 4612 ASSOC_TIMEOUT, 4613 ASSOC_ABANDON, 4614 }; 4615 4616 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4617 enum assoc_status status) 4618 { 4619 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4620 4621 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4622 4623 sdata->u.mgd.assoc_data = NULL; 4624 4625 if (status != ASSOC_SUCCESS) { 4626 /* 4627 * we are not associated yet, the only timer that could be 4628 * running is the timeout for the association response which 4629 * which is not relevant anymore. 4630 */ 4631 timer_delete_sync(&sdata->u.mgd.timer); 4632 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4633 4634 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4635 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4636 BSS_CHANGED_BSSID); 4637 sdata->u.mgd.flags = 0; 4638 sdata->vif.bss_conf.mu_mimo_owner = false; 4639 4640 if (status != ASSOC_REJECTED) { 4641 struct cfg80211_assoc_failure data = { 4642 .timeout = status == ASSOC_TIMEOUT, 4643 }; 4644 int i; 4645 4646 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4647 ARRAY_SIZE(assoc_data->link)); 4648 4649 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4650 data.bss[i] = assoc_data->link[i].bss; 4651 4652 if (ieee80211_vif_is_mld(&sdata->vif)) 4653 data.ap_mld_addr = assoc_data->ap_addr; 4654 4655 cfg80211_assoc_failure(sdata->dev, &data); 4656 } 4657 4658 ieee80211_link_release_channel(&sdata->deflink); 4659 ieee80211_vif_set_links(sdata, 0, 0); 4660 } 4661 4662 kfree(assoc_data); 4663 } 4664 4665 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4666 struct ieee80211_mgmt *mgmt, size_t len) 4667 { 4668 struct ieee80211_local *local = sdata->local; 4669 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4670 const struct element *challenge; 4671 u8 *pos; 4672 u32 tx_flags = 0; 4673 struct ieee80211_prep_tx_info info = { 4674 .subtype = IEEE80211_STYPE_AUTH, 4675 .link_id = auth_data->link_id, 4676 }; 4677 4678 pos = mgmt->u.auth.variable; 4679 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4680 len - (pos - (u8 *)mgmt)); 4681 if (!challenge) 4682 return; 4683 auth_data->expected_transaction = 4; 4684 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4685 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4686 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4687 IEEE80211_TX_INTFL_MLME_CONN_TX; 4688 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4689 (void *)challenge, 4690 challenge->datalen + sizeof(*challenge), 4691 auth_data->ap_addr, auth_data->ap_addr, 4692 auth_data->key, auth_data->key_len, 4693 auth_data->key_idx, tx_flags); 4694 } 4695 4696 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4697 { 4698 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4699 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4700 struct sta_info *sta; 4701 4702 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4703 4704 sdata_info(sdata, "authenticated\n"); 4705 ifmgd->auth_data->done = true; 4706 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4707 ifmgd->auth_data->timeout_started = true; 4708 run_again(sdata, ifmgd->auth_data->timeout); 4709 4710 /* move station state to auth */ 4711 sta = sta_info_get(sdata, ap_addr); 4712 if (!sta) { 4713 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4714 return false; 4715 } 4716 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4717 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4718 return false; 4719 } 4720 4721 return true; 4722 } 4723 4724 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4725 struct ieee80211_mgmt *mgmt, size_t len) 4726 { 4727 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4728 u16 auth_alg, auth_transaction, status_code; 4729 struct ieee80211_event event = { 4730 .type = MLME_EVENT, 4731 .u.mlme.data = AUTH_EVENT, 4732 }; 4733 struct ieee80211_prep_tx_info info = { 4734 .subtype = IEEE80211_STYPE_AUTH, 4735 }; 4736 4737 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4738 4739 if (len < 24 + 6) 4740 return; 4741 4742 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4743 return; 4744 4745 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4746 return; 4747 4748 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4749 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4750 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4751 4752 info.link_id = ifmgd->auth_data->link_id; 4753 4754 if (auth_alg != ifmgd->auth_data->algorithm || 4755 (auth_alg != WLAN_AUTH_SAE && 4756 auth_transaction != ifmgd->auth_data->expected_transaction) || 4757 (auth_alg == WLAN_AUTH_SAE && 4758 (auth_transaction < ifmgd->auth_data->expected_transaction || 4759 auth_transaction > 2))) { 4760 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4761 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4762 auth_transaction, 4763 ifmgd->auth_data->expected_transaction); 4764 goto notify_driver; 4765 } 4766 4767 if (status_code != WLAN_STATUS_SUCCESS) { 4768 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4769 4770 if (auth_alg == WLAN_AUTH_SAE && 4771 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4772 (auth_transaction == 1 && 4773 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4774 status_code == WLAN_STATUS_SAE_PK)))) { 4775 /* waiting for userspace now */ 4776 ifmgd->auth_data->waiting = true; 4777 ifmgd->auth_data->timeout = 4778 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4779 ifmgd->auth_data->timeout_started = true; 4780 run_again(sdata, ifmgd->auth_data->timeout); 4781 goto notify_driver; 4782 } 4783 4784 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4785 mgmt->sa, status_code); 4786 ieee80211_destroy_auth_data(sdata, false); 4787 event.u.mlme.status = MLME_DENIED; 4788 event.u.mlme.reason = status_code; 4789 drv_event_callback(sdata->local, sdata, &event); 4790 goto notify_driver; 4791 } 4792 4793 switch (ifmgd->auth_data->algorithm) { 4794 case WLAN_AUTH_OPEN: 4795 case WLAN_AUTH_LEAP: 4796 case WLAN_AUTH_FT: 4797 case WLAN_AUTH_SAE: 4798 case WLAN_AUTH_FILS_SK: 4799 case WLAN_AUTH_FILS_SK_PFS: 4800 case WLAN_AUTH_FILS_PK: 4801 break; 4802 case WLAN_AUTH_SHARED_KEY: 4803 if (ifmgd->auth_data->expected_transaction != 4) { 4804 ieee80211_auth_challenge(sdata, mgmt, len); 4805 /* need another frame */ 4806 return; 4807 } 4808 break; 4809 default: 4810 WARN_ONCE(1, "invalid auth alg %d", 4811 ifmgd->auth_data->algorithm); 4812 goto notify_driver; 4813 } 4814 4815 event.u.mlme.status = MLME_SUCCESS; 4816 info.success = 1; 4817 drv_event_callback(sdata->local, sdata, &event); 4818 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4819 (auth_transaction == 2 && 4820 ifmgd->auth_data->expected_transaction == 2)) { 4821 if (!ieee80211_mark_sta_auth(sdata)) 4822 return; /* ignore frame -- wait for timeout */ 4823 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4824 auth_transaction == 2) { 4825 sdata_info(sdata, "SAE peer confirmed\n"); 4826 ifmgd->auth_data->peer_confirmed = true; 4827 } 4828 4829 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4830 notify_driver: 4831 drv_mgd_complete_tx(sdata->local, sdata, &info); 4832 } 4833 4834 #define case_WLAN(type) \ 4835 case WLAN_REASON_##type: return #type 4836 4837 const char *ieee80211_get_reason_code_string(u16 reason_code) 4838 { 4839 switch (reason_code) { 4840 case_WLAN(UNSPECIFIED); 4841 case_WLAN(PREV_AUTH_NOT_VALID); 4842 case_WLAN(DEAUTH_LEAVING); 4843 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4844 case_WLAN(DISASSOC_AP_BUSY); 4845 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4846 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4847 case_WLAN(DISASSOC_STA_HAS_LEFT); 4848 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4849 case_WLAN(DISASSOC_BAD_POWER); 4850 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4851 case_WLAN(INVALID_IE); 4852 case_WLAN(MIC_FAILURE); 4853 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4854 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4855 case_WLAN(IE_DIFFERENT); 4856 case_WLAN(INVALID_GROUP_CIPHER); 4857 case_WLAN(INVALID_PAIRWISE_CIPHER); 4858 case_WLAN(INVALID_AKMP); 4859 case_WLAN(UNSUPP_RSN_VERSION); 4860 case_WLAN(INVALID_RSN_IE_CAP); 4861 case_WLAN(IEEE8021X_FAILED); 4862 case_WLAN(CIPHER_SUITE_REJECTED); 4863 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4864 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4865 case_WLAN(DISASSOC_LOW_ACK); 4866 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4867 case_WLAN(QSTA_LEAVE_QBSS); 4868 case_WLAN(QSTA_NOT_USE); 4869 case_WLAN(QSTA_REQUIRE_SETUP); 4870 case_WLAN(QSTA_TIMEOUT); 4871 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4872 case_WLAN(MESH_PEER_CANCELED); 4873 case_WLAN(MESH_MAX_PEERS); 4874 case_WLAN(MESH_CONFIG); 4875 case_WLAN(MESH_CLOSE); 4876 case_WLAN(MESH_MAX_RETRIES); 4877 case_WLAN(MESH_CONFIRM_TIMEOUT); 4878 case_WLAN(MESH_INVALID_GTK); 4879 case_WLAN(MESH_INCONSISTENT_PARAM); 4880 case_WLAN(MESH_INVALID_SECURITY); 4881 case_WLAN(MESH_PATH_ERROR); 4882 case_WLAN(MESH_PATH_NOFORWARD); 4883 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4884 case_WLAN(MAC_EXISTS_IN_MBSS); 4885 case_WLAN(MESH_CHAN_REGULATORY); 4886 case_WLAN(MESH_CHAN); 4887 default: return "<unknown>"; 4888 } 4889 } 4890 4891 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4892 struct ieee80211_mgmt *mgmt, size_t len) 4893 { 4894 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4895 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4896 4897 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4898 4899 if (len < 24 + 2) 4900 return; 4901 4902 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4903 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4904 return; 4905 } 4906 4907 if (ifmgd->associated && 4908 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4909 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4910 sdata->vif.cfg.ap_addr, reason_code, 4911 ieee80211_get_reason_code_string(reason_code)); 4912 4913 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4914 4915 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4916 reason_code, false); 4917 return; 4918 } 4919 4920 if (ifmgd->assoc_data && 4921 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4922 sdata_info(sdata, 4923 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4924 ifmgd->assoc_data->ap_addr, reason_code, 4925 ieee80211_get_reason_code_string(reason_code)); 4926 4927 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4928 4929 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4930 return; 4931 } 4932 } 4933 4934 4935 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4936 struct ieee80211_mgmt *mgmt, size_t len) 4937 { 4938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4939 u16 reason_code; 4940 4941 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4942 4943 if (len < 24 + 2) 4944 return; 4945 4946 if (!ifmgd->associated || 4947 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4948 return; 4949 4950 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4951 4952 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4953 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4954 return; 4955 } 4956 4957 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4958 sdata->vif.cfg.ap_addr, reason_code, 4959 ieee80211_get_reason_code_string(reason_code)); 4960 4961 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4962 4963 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4964 false); 4965 } 4966 4967 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4968 struct ieee80211_supported_band *sband, 4969 const struct link_sta_info *link_sta, 4970 const struct ieee802_11_elems *elems) 4971 { 4972 const struct ieee80211_sta_he_cap *own_he_cap = 4973 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4974 4975 if (elems->ext_capab_len < 10) 4976 return false; 4977 4978 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4979 return false; 4980 4981 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4982 IEEE80211_HE_MAC_CAP0_TWT_RES && 4983 own_he_cap && 4984 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4985 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4986 } 4987 4988 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4989 struct ieee80211_supported_band *sband, 4990 struct ieee80211_link_data *link, 4991 struct link_sta_info *link_sta, 4992 struct ieee802_11_elems *elems) 4993 { 4994 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4995 4996 if (link->conf->twt_requester != twt) { 4997 link->conf->twt_requester = twt; 4998 return BSS_CHANGED_TWT; 4999 } 5000 return 0; 5001 } 5002 5003 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5004 struct ieee80211_bss_conf *bss_conf, 5005 struct ieee80211_supported_band *sband, 5006 struct link_sta_info *link_sta) 5007 { 5008 const struct ieee80211_sta_he_cap *own_he_cap = 5009 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5010 5011 return bss_conf->he_support && 5012 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5013 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5014 own_he_cap && 5015 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5016 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5017 } 5018 5019 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5020 bool enabled) 5021 { 5022 /* in any case this is called, dialog token should be reset */ 5023 sdata->u.mgd.epcs.dialog_token = 0; 5024 5025 if (sdata->u.mgd.epcs.enabled == enabled) 5026 return; 5027 5028 sdata->u.mgd.epcs.enabled = enabled; 5029 cfg80211_epcs_changed(sdata->dev, enabled); 5030 } 5031 5032 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5033 { 5034 struct ieee80211_local *local = sdata->local; 5035 u8 link_id; 5036 5037 if (!sdata->u.mgd.epcs.enabled) 5038 return; 5039 5040 lockdep_assert_wiphy(local->hw.wiphy); 5041 5042 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5043 struct ieee802_11_elems *elems; 5044 struct ieee80211_link_data *link; 5045 const struct cfg80211_bss_ies *ies; 5046 bool ret; 5047 5048 rcu_read_lock(); 5049 5050 link = sdata_dereference(sdata->link[link_id], sdata); 5051 if (!link || !link->conf || !link->conf->bss) { 5052 rcu_read_unlock(); 5053 continue; 5054 } 5055 5056 if (link->u.mgd.disable_wmm_tracking) { 5057 rcu_read_unlock(); 5058 ieee80211_set_wmm_default(link, false, false); 5059 continue; 5060 } 5061 5062 ies = rcu_dereference(link->conf->bss->beacon_ies); 5063 if (!ies) { 5064 rcu_read_unlock(); 5065 ieee80211_set_wmm_default(link, false, false); 5066 continue; 5067 } 5068 5069 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5070 NULL); 5071 if (!elems) { 5072 rcu_read_unlock(); 5073 ieee80211_set_wmm_default(link, false, false); 5074 continue; 5075 } 5076 5077 ret = _ieee80211_sta_wmm_params(local, link, 5078 elems->wmm_param, 5079 elems->wmm_param_len, 5080 elems->mu_edca_param_set); 5081 5082 kfree(elems); 5083 rcu_read_unlock(); 5084 5085 if (!ret) { 5086 ieee80211_set_wmm_default(link, false, false); 5087 continue; 5088 } 5089 5090 ieee80211_mgd_set_link_qos_params(link); 5091 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5092 } 5093 } 5094 5095 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5096 struct link_sta_info *link_sta, 5097 struct cfg80211_bss *cbss, 5098 struct ieee80211_mgmt *mgmt, 5099 const u8 *elem_start, 5100 unsigned int elem_len, 5101 u64 *changed) 5102 { 5103 struct ieee80211_sub_if_data *sdata = link->sdata; 5104 struct ieee80211_mgd_assoc_data *assoc_data = 5105 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5106 struct ieee80211_bss_conf *bss_conf = link->conf; 5107 struct ieee80211_local *local = sdata->local; 5108 unsigned int link_id = link->link_id; 5109 struct ieee80211_elems_parse_params parse_params = { 5110 .mode = link->u.mgd.conn.mode, 5111 .start = elem_start, 5112 .len = elem_len, 5113 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5114 .from_ap = true, 5115 }; 5116 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5117 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5118 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5119 const struct cfg80211_bss_ies *bss_ies = NULL; 5120 struct ieee80211_supported_band *sband; 5121 struct ieee802_11_elems *elems; 5122 const __le16 prof_bss_param_ch_present = 5123 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5124 u16 capab_info; 5125 bool ret; 5126 5127 elems = ieee802_11_parse_elems_full(&parse_params); 5128 if (!elems) 5129 return false; 5130 5131 if (link_id == assoc_data->assoc_link_id) { 5132 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5133 5134 /* 5135 * we should not get to this flow unless the association was 5136 * successful, so set the status directly to success 5137 */ 5138 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5139 if (elems->ml_basic) { 5140 int bss_param_ch_cnt = 5141 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5142 5143 if (bss_param_ch_cnt < 0) { 5144 ret = false; 5145 goto out; 5146 } 5147 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5148 bss_conf->bss_param_ch_cnt_link_id = link_id; 5149 } 5150 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5151 !elems->prof || 5152 !(elems->prof->control & prof_bss_param_ch_present)) { 5153 ret = false; 5154 goto out; 5155 } else { 5156 const u8 *ptr = elems->prof->variable + 5157 elems->prof->sta_info_len - 1; 5158 int bss_param_ch_cnt; 5159 5160 /* 5161 * During parsing, we validated that these fields exist, 5162 * otherwise elems->prof would have been set to NULL. 5163 */ 5164 capab_info = get_unaligned_le16(ptr); 5165 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5166 bss_param_ch_cnt = 5167 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5168 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5169 bss_conf->bss_param_ch_cnt_link_id = link_id; 5170 5171 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5172 link_info(link, "association response status code=%u\n", 5173 assoc_data->link[link_id].status); 5174 ret = true; 5175 goto out; 5176 } 5177 } 5178 5179 if (!is_s1g && !elems->supp_rates) { 5180 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5181 ret = false; 5182 goto out; 5183 } 5184 5185 link->u.mgd.tdls_chan_switch_prohibited = 5186 elems->ext_capab && elems->ext_capab_len >= 5 && 5187 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5188 5189 /* 5190 * Some APs are erroneously not including some information in their 5191 * (re)association response frames. Try to recover by using the data 5192 * from the beacon or probe response. This seems to afflict mobile 5193 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5194 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5195 */ 5196 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5197 ((assoc_data->wmm && !elems->wmm_param) || 5198 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5199 (!elems->ht_cap_elem || !elems->ht_operation)) || 5200 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5201 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5202 const struct cfg80211_bss_ies *ies; 5203 struct ieee802_11_elems *bss_elems; 5204 5205 rcu_read_lock(); 5206 ies = rcu_dereference(cbss->ies); 5207 if (ies) 5208 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5209 GFP_ATOMIC); 5210 rcu_read_unlock(); 5211 if (!bss_ies) { 5212 ret = false; 5213 goto out; 5214 } 5215 5216 parse_params.start = bss_ies->data; 5217 parse_params.len = bss_ies->len; 5218 parse_params.bss = cbss; 5219 parse_params.link_id = -1; 5220 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5221 if (!bss_elems) { 5222 ret = false; 5223 goto out; 5224 } 5225 5226 if (assoc_data->wmm && 5227 !elems->wmm_param && bss_elems->wmm_param) { 5228 elems->wmm_param = bss_elems->wmm_param; 5229 sdata_info(sdata, 5230 "AP bug: WMM param missing from AssocResp\n"); 5231 } 5232 5233 /* 5234 * Also check if we requested HT/VHT, otherwise the AP doesn't 5235 * have to include the IEs in the (re)association response. 5236 */ 5237 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5238 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5239 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5240 sdata_info(sdata, 5241 "AP bug: HT capability missing from AssocResp\n"); 5242 } 5243 if (!elems->ht_operation && bss_elems->ht_operation && 5244 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5245 elems->ht_operation = bss_elems->ht_operation; 5246 sdata_info(sdata, 5247 "AP bug: HT operation missing from AssocResp\n"); 5248 } 5249 5250 if (is_5ghz) { 5251 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5252 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5253 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5254 sdata_info(sdata, 5255 "AP bug: VHT capa missing from AssocResp\n"); 5256 } 5257 5258 if (!elems->vht_operation && bss_elems->vht_operation && 5259 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5260 elems->vht_operation = bss_elems->vht_operation; 5261 sdata_info(sdata, 5262 "AP bug: VHT operation missing from AssocResp\n"); 5263 } 5264 } 5265 kfree(bss_elems); 5266 } 5267 5268 /* 5269 * We previously checked these in the beacon/probe response, so 5270 * they should be present here. This is just a safety net. 5271 * Note that the ieee80211_config_bw() below would also check 5272 * for this (and more), but this has better error reporting. 5273 */ 5274 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5275 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5276 sdata_info(sdata, 5277 "HT AP is missing WMM params or HT capability/operation\n"); 5278 ret = false; 5279 goto out; 5280 } 5281 5282 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5283 (!elems->vht_cap_elem || !elems->vht_operation)) { 5284 sdata_info(sdata, 5285 "VHT AP is missing VHT capability/operation\n"); 5286 ret = false; 5287 goto out; 5288 } 5289 5290 /* check/update if AP changed anything in assoc response vs. scan */ 5291 if (ieee80211_config_bw(link, elems, 5292 link_id == assoc_data->assoc_link_id, 5293 changed, "assoc response")) { 5294 ret = false; 5295 goto out; 5296 } 5297 5298 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5299 ret = false; 5300 goto out; 5301 } 5302 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5303 5304 /* Set up internal HT/VHT capabilities */ 5305 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5306 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5307 elems->ht_cap_elem, 5308 link_sta); 5309 5310 if (elems->vht_cap_elem && 5311 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5312 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5313 const struct cfg80211_bss_ies *ies; 5314 5315 /* 5316 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5317 * too large maximum MPDU length in the association response 5318 * (indicating 12k) that it cannot actually process ... 5319 * Work around that. 5320 */ 5321 rcu_read_lock(); 5322 ies = rcu_dereference(cbss->ies); 5323 if (ies) { 5324 const struct element *elem; 5325 5326 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5327 ies->data, ies->len); 5328 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5329 bss_vht_cap = (const void *)elem->data; 5330 } 5331 5332 if (ieee80211_hw_check(&local->hw, STRICT) && 5333 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5334 sizeof(*bss_vht_cap)))) { 5335 rcu_read_unlock(); 5336 ret = false; 5337 link_info(link, "VHT capabilities mismatch\n"); 5338 goto out; 5339 } 5340 5341 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5342 elems->vht_cap_elem, 5343 bss_vht_cap, link_sta); 5344 rcu_read_unlock(); 5345 } 5346 5347 if (elems->he_operation && 5348 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5349 elems->he_cap) { 5350 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5351 elems->he_cap, 5352 elems->he_cap_len, 5353 elems->he_6ghz_capa, 5354 link_sta); 5355 5356 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5357 if (elems->rsnx && elems->rsnx_len && 5358 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5359 wiphy_ext_feature_isset(local->hw.wiphy, 5360 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5361 bss_conf->twt_protected = true; 5362 else 5363 bss_conf->twt_protected = false; 5364 5365 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5366 link_sta, elems); 5367 5368 if (elems->eht_operation && elems->eht_cap && 5369 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5370 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5371 elems->he_cap, 5372 elems->he_cap_len, 5373 elems->eht_cap, 5374 elems->eht_cap_len, 5375 link_sta); 5376 5377 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5378 bss_conf->epcs_support = bss_conf->eht_support && 5379 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5380 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5381 5382 /* EPCS might be already enabled but a new added link 5383 * does not support EPCS. This should not really happen 5384 * in practice. 5385 */ 5386 if (sdata->u.mgd.epcs.enabled && 5387 !bss_conf->epcs_support) 5388 ieee80211_epcs_teardown(sdata); 5389 } else { 5390 bss_conf->eht_support = false; 5391 bss_conf->epcs_support = false; 5392 } 5393 } else { 5394 bss_conf->he_support = false; 5395 bss_conf->twt_requester = false; 5396 bss_conf->twt_protected = false; 5397 bss_conf->eht_support = false; 5398 bss_conf->epcs_support = false; 5399 } 5400 5401 bss_conf->twt_broadcast = 5402 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5403 5404 if (bss_conf->he_support) { 5405 bss_conf->he_bss_color.color = 5406 le32_get_bits(elems->he_operation->he_oper_params, 5407 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5408 bss_conf->he_bss_color.partial = 5409 le32_get_bits(elems->he_operation->he_oper_params, 5410 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5411 bss_conf->he_bss_color.enabled = 5412 !le32_get_bits(elems->he_operation->he_oper_params, 5413 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5414 5415 if (bss_conf->he_bss_color.enabled) 5416 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5417 5418 bss_conf->htc_trig_based_pkt_ext = 5419 le32_get_bits(elems->he_operation->he_oper_params, 5420 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5421 bss_conf->frame_time_rts_th = 5422 le32_get_bits(elems->he_operation->he_oper_params, 5423 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5424 5425 bss_conf->uora_exists = !!elems->uora_element; 5426 if (elems->uora_element) 5427 bss_conf->uora_ocw_range = elems->uora_element[0]; 5428 5429 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5430 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5431 /* TODO: OPEN: what happens if BSS color disable is set? */ 5432 } 5433 5434 if (cbss->transmitted_bss) { 5435 bss_conf->nontransmitted = true; 5436 ether_addr_copy(bss_conf->transmitter_bssid, 5437 cbss->transmitted_bss->bssid); 5438 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5439 bss_conf->bssid_index = cbss->bssid_index; 5440 } 5441 5442 /* 5443 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5444 * in their association response, so ignore that data for our own 5445 * configuration. If it changed since the last beacon, we'll get the 5446 * next beacon and update then. 5447 */ 5448 5449 /* 5450 * If an operating mode notification IE is present, override the 5451 * NSS calculation (that would be done in rate_control_rate_init()) 5452 * and use the # of streams from that element. 5453 */ 5454 if (elems->opmode_notif && 5455 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5456 u8 nss; 5457 5458 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5459 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5460 nss += 1; 5461 link_sta->pub->rx_nss = nss; 5462 } 5463 5464 /* 5465 * Always handle WMM once after association regardless 5466 * of the first value the AP uses. Setting -1 here has 5467 * that effect because the AP values is an unsigned 5468 * 4-bit value. 5469 */ 5470 link->u.mgd.wmm_last_param_set = -1; 5471 link->u.mgd.mu_edca_last_param_set = -1; 5472 5473 if (link->u.mgd.disable_wmm_tracking) { 5474 ieee80211_set_wmm_default(link, false, false); 5475 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5476 elems->wmm_param_len, 5477 elems->mu_edca_param_set)) { 5478 /* still enable QoS since we might have HT/VHT */ 5479 ieee80211_set_wmm_default(link, false, true); 5480 /* disable WMM tracking in this case to disable 5481 * tracking WMM parameter changes in the beacon if 5482 * the parameters weren't actually valid. Doing so 5483 * avoids changing parameters very strangely when 5484 * the AP is going back and forth between valid and 5485 * invalid parameters. 5486 */ 5487 link->u.mgd.disable_wmm_tracking = true; 5488 } 5489 5490 if (elems->max_idle_period_ie) { 5491 bss_conf->max_idle_period = 5492 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5493 bss_conf->protected_keep_alive = 5494 !!(elems->max_idle_period_ie->idle_options & 5495 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5496 *changed |= BSS_CHANGED_KEEP_ALIVE; 5497 } else { 5498 bss_conf->max_idle_period = 0; 5499 bss_conf->protected_keep_alive = false; 5500 } 5501 5502 /* set assoc capability (AID was already set earlier), 5503 * ieee80211_set_associated() will tell the driver */ 5504 bss_conf->assoc_capability = capab_info; 5505 5506 ret = true; 5507 out: 5508 kfree(elems); 5509 kfree(bss_ies); 5510 return ret; 5511 } 5512 5513 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5514 struct sta_info *sta, 5515 struct link_sta_info *link_sta, 5516 struct cfg80211_bss *cbss) 5517 { 5518 struct ieee80211_sub_if_data *sdata = link->sdata; 5519 struct ieee80211_local *local = sdata->local; 5520 struct ieee80211_bss *bss = (void *)cbss->priv; 5521 u32 rates = 0, basic_rates = 0; 5522 bool have_higher_than_11mbit = false; 5523 int min_rate = INT_MAX, min_rate_index = -1; 5524 struct ieee80211_supported_band *sband; 5525 5526 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5527 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5528 5529 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5530 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5531 ieee80211_s1g_sta_rate_init(sta); 5532 return 0; 5533 } 5534 5535 sband = local->hw.wiphy->bands[cbss->channel->band]; 5536 5537 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5538 NULL, 0, 5539 &rates, &basic_rates, NULL, 5540 &have_higher_than_11mbit, 5541 &min_rate, &min_rate_index); 5542 5543 /* 5544 * This used to be a workaround for basic rates missing 5545 * in the association response frame. Now that we no 5546 * longer use the basic rates from there, it probably 5547 * doesn't happen any more, but keep the workaround so 5548 * in case some *other* APs are buggy in different ways 5549 * we can connect -- with a warning. 5550 * Allow this workaround only in case the AP provided at least 5551 * one rate. 5552 */ 5553 if (min_rate_index < 0) { 5554 link_info(link, "No legacy rates in association response\n"); 5555 return -EINVAL; 5556 } else if (!basic_rates) { 5557 link_info(link, "No basic rates, using min rate instead\n"); 5558 basic_rates = BIT(min_rate_index); 5559 } 5560 5561 if (rates) 5562 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5563 else 5564 link_info(link, "No rates found, keeping mandatory only\n"); 5565 5566 link->conf->basic_rates = basic_rates; 5567 5568 /* cf. IEEE 802.11 9.2.12 */ 5569 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5570 have_higher_than_11mbit; 5571 5572 return 0; 5573 } 5574 5575 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5576 struct cfg80211_bss *cbss) 5577 { 5578 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5579 const struct element *ht_cap_elem, *vht_cap_elem; 5580 const struct cfg80211_bss_ies *ies; 5581 const struct ieee80211_ht_cap *ht_cap; 5582 const struct ieee80211_vht_cap *vht_cap; 5583 const struct ieee80211_he_cap_elem *he_cap; 5584 const struct element *he_cap_elem; 5585 u16 mcs_80_map, mcs_160_map; 5586 int i, mcs_nss_size; 5587 bool support_160; 5588 u8 chains = 1; 5589 5590 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5591 return chains; 5592 5593 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5594 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5595 ht_cap = (void *)ht_cap_elem->data; 5596 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5597 /* 5598 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5599 * "Tx Unequal Modulation Supported" fields. 5600 */ 5601 } 5602 5603 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5604 return chains; 5605 5606 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5607 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5608 u8 nss; 5609 u16 tx_mcs_map; 5610 5611 vht_cap = (void *)vht_cap_elem->data; 5612 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5613 for (nss = 8; nss > 0; nss--) { 5614 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5615 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5616 break; 5617 } 5618 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5619 chains = max(chains, nss); 5620 } 5621 5622 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5623 return chains; 5624 5625 ies = rcu_dereference(cbss->ies); 5626 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5627 ies->data, ies->len); 5628 5629 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5630 return chains; 5631 5632 /* skip one byte ext_tag_id */ 5633 he_cap = (void *)(he_cap_elem->data + 1); 5634 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5635 5636 /* invalid HE IE */ 5637 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5638 return chains; 5639 5640 /* mcs_nss is right after he_cap info */ 5641 he_mcs_nss_supp = (void *)(he_cap + 1); 5642 5643 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5644 5645 for (i = 7; i >= 0; i--) { 5646 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5647 5648 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5649 chains = max_t(u8, chains, i + 1); 5650 break; 5651 } 5652 } 5653 5654 support_160 = he_cap->phy_cap_info[0] & 5655 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5656 5657 if (!support_160) 5658 return chains; 5659 5660 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5661 for (i = 7; i >= 0; i--) { 5662 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5663 5664 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5665 chains = max_t(u8, chains, i + 1); 5666 break; 5667 } 5668 } 5669 5670 return chains; 5671 } 5672 5673 static void 5674 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5675 struct ieee80211_supported_band *sband, 5676 struct cfg80211_assoc_request *req, 5677 bool wmm_used, int link_id, 5678 struct ieee80211_conn_settings *conn) 5679 { 5680 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5681 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5682 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5683 const struct ieee80211_sta_he_cap *he_cap; 5684 const struct ieee80211_sta_eht_cap *eht_cap; 5685 struct ieee80211_sta_vht_cap vht_cap; 5686 5687 if (sband->band == NL80211_BAND_S1GHZ) { 5688 conn->mode = IEEE80211_CONN_MODE_S1G; 5689 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5690 mlme_dbg(sdata, "operating as S1G STA\n"); 5691 return; 5692 } 5693 5694 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5695 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5696 5697 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5698 5699 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5700 mlme_link_id_dbg(sdata, link_id, 5701 "HT disabled by flag, limiting to legacy\n"); 5702 goto out; 5703 } 5704 5705 if (!wmm_used) { 5706 mlme_link_id_dbg(sdata, link_id, 5707 "WMM/QoS not supported, limiting to legacy\n"); 5708 goto out; 5709 } 5710 5711 if (req) { 5712 unsigned int i; 5713 5714 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5715 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5716 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5717 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5718 netdev_info(sdata->dev, 5719 "WEP/TKIP use, limiting to legacy\n"); 5720 goto out; 5721 } 5722 } 5723 } 5724 5725 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5726 mlme_link_id_dbg(sdata, link_id, 5727 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5728 goto out; 5729 } 5730 5731 /* HT is fine */ 5732 conn->mode = IEEE80211_CONN_MODE_HT; 5733 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5734 IEEE80211_CONN_BW_LIMIT_40 : 5735 IEEE80211_CONN_BW_LIMIT_20; 5736 5737 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5738 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5739 5740 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5741 mlme_link_id_dbg(sdata, link_id, 5742 "VHT disabled by flag, limiting to HT\n"); 5743 goto out; 5744 } 5745 5746 if (vht_cap.vht_supported && is_5ghz) { 5747 bool have_80mhz = false; 5748 unsigned int i; 5749 5750 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5751 mlme_link_id_dbg(sdata, link_id, 5752 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5753 goto out; 5754 } 5755 5756 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5757 for (i = 0; i < sband->n_channels; i++) { 5758 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5759 IEEE80211_CHAN_NO_80MHZ)) 5760 continue; 5761 5762 have_80mhz = true; 5763 break; 5764 } 5765 5766 if (!have_80mhz) { 5767 mlme_link_id_dbg(sdata, link_id, 5768 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5769 goto out; 5770 } 5771 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5772 mlme_link_id_dbg(sdata, link_id, 5773 "no VHT support on 5 GHz, limiting to HT\n"); 5774 goto out; 5775 } 5776 5777 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5778 if (sband->band != NL80211_BAND_2GHZ) { 5779 conn->mode = IEEE80211_CONN_MODE_VHT; 5780 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5781 } 5782 5783 if (is_5ghz && 5784 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5785 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5786 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5787 mlme_link_id_dbg(sdata, link_id, 5788 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5789 } 5790 5791 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5792 mlme_link_id_dbg(sdata, link_id, 5793 "HE disabled by flag, limiting to HT/VHT\n"); 5794 goto out; 5795 } 5796 5797 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5798 if (!he_cap) { 5799 WARN_ON(is_6ghz); 5800 mlme_link_id_dbg(sdata, link_id, 5801 "no HE support, limiting to HT/VHT\n"); 5802 goto out; 5803 } 5804 5805 /* so we have HE */ 5806 conn->mode = IEEE80211_CONN_MODE_HE; 5807 5808 /* check bandwidth */ 5809 switch (sband->band) { 5810 default: 5811 case NL80211_BAND_2GHZ: 5812 if (he_cap->he_cap_elem.phy_cap_info[0] & 5813 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5814 break; 5815 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5816 mlme_link_id_dbg(sdata, link_id, 5817 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5818 break; 5819 case NL80211_BAND_5GHZ: 5820 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5821 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5822 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5823 mlme_link_id_dbg(sdata, link_id, 5824 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5825 break; 5826 } 5827 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5828 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5829 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5830 conn->bw_limit, 5831 IEEE80211_CONN_BW_LIMIT_80); 5832 mlme_link_id_dbg(sdata, link_id, 5833 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5834 } 5835 break; 5836 case NL80211_BAND_6GHZ: 5837 if (he_cap->he_cap_elem.phy_cap_info[0] & 5838 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5839 break; 5840 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5841 conn->bw_limit, 5842 IEEE80211_CONN_BW_LIMIT_80); 5843 mlme_link_id_dbg(sdata, link_id, 5844 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5845 break; 5846 } 5847 5848 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5849 mlme_link_id_dbg(sdata, link_id, 5850 "EHT disabled by flag, limiting to HE\n"); 5851 goto out; 5852 } 5853 5854 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5855 if (!eht_cap) { 5856 mlme_link_id_dbg(sdata, link_id, 5857 "no EHT support, limiting to HE\n"); 5858 goto out; 5859 } 5860 5861 /* we have EHT */ 5862 5863 conn->mode = IEEE80211_CONN_MODE_EHT; 5864 5865 /* check bandwidth */ 5866 if (is_6ghz && 5867 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5868 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5869 else if (is_6ghz) 5870 mlme_link_id_dbg(sdata, link_id, 5871 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5872 5873 out: 5874 mlme_link_id_dbg(sdata, link_id, 5875 "determined local STA to be %s, BW limited to %d MHz\n", 5876 ieee80211_conn_mode_str(conn->mode), 5877 20 * (1 << conn->bw_limit)); 5878 } 5879 5880 static void 5881 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5882 struct ieee80211_supported_band *sband, 5883 struct cfg80211_auth_request *req, 5884 bool wmm_used, 5885 struct ieee80211_conn_settings *conn) 5886 { 5887 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5888 req->link_id > 0 ? req->link_id : 0, 5889 conn); 5890 } 5891 5892 static void 5893 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5894 struct ieee80211_supported_band *sband, 5895 struct cfg80211_assoc_request *req, 5896 bool wmm_used, int link_id, 5897 struct ieee80211_conn_settings *conn) 5898 { 5899 struct ieee80211_conn_settings tmp; 5900 5901 WARN_ON(!req); 5902 5903 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5904 &tmp); 5905 5906 conn->mode = min_t(enum ieee80211_conn_mode, 5907 conn->mode, tmp.mode); 5908 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5909 conn->bw_limit, tmp.bw_limit); 5910 } 5911 5912 static enum ieee80211_ap_reg_power 5913 ieee80211_ap_power_type(u8 control) 5914 { 5915 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5916 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5917 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5918 return IEEE80211_REG_LPI_AP; 5919 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5920 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5921 return IEEE80211_REG_SP_AP; 5922 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5923 return IEEE80211_REG_VLP_AP; 5924 default: 5925 return IEEE80211_REG_UNSET_AP; 5926 } 5927 } 5928 5929 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5930 struct ieee80211_link_data *link, 5931 int link_id, 5932 struct cfg80211_bss *cbss, bool mlo, 5933 struct ieee80211_conn_settings *conn, 5934 unsigned long *userspace_selectors) 5935 { 5936 struct ieee80211_local *local = sdata->local; 5937 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5938 struct ieee80211_chan_req chanreq = {}; 5939 struct cfg80211_chan_def ap_chandef; 5940 struct ieee802_11_elems *elems; 5941 int ret; 5942 5943 lockdep_assert_wiphy(local->hw.wiphy); 5944 5945 rcu_read_lock(); 5946 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5947 &chanreq, &ap_chandef, 5948 userspace_selectors); 5949 5950 if (IS_ERR(elems)) { 5951 rcu_read_unlock(); 5952 return PTR_ERR(elems); 5953 } 5954 5955 if (mlo && !elems->ml_basic) { 5956 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5957 rcu_read_unlock(); 5958 kfree(elems); 5959 return -EINVAL; 5960 } 5961 5962 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5963 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5964 5965 if (elems->pwr_constr_elem) 5966 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5967 5968 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5969 if (he_6ghz_oper) 5970 link->conf->power_type = 5971 ieee80211_ap_power_type(he_6ghz_oper->control); 5972 else 5973 link_info(link, 5974 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5975 cbss->channel->center_freq); 5976 5977 link->conf->tpe = elems->tpe; 5978 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5979 &chanreq.oper); 5980 } 5981 rcu_read_unlock(); 5982 /* the element data was RCU protected so no longer valid anyway */ 5983 kfree(elems); 5984 elems = NULL; 5985 5986 if (!link) 5987 return 0; 5988 5989 rcu_read_lock(); 5990 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5991 local->rx_chains); 5992 rcu_read_unlock(); 5993 5994 /* 5995 * If this fails (possibly due to channel context sharing 5996 * on incompatible channels, e.g. 80+80 and 160 sharing the 5997 * same control channel) try to use a smaller bandwidth. 5998 */ 5999 ret = ieee80211_link_use_channel(link, &chanreq, 6000 IEEE80211_CHANCTX_SHARED); 6001 6002 /* don't downgrade for 5 and 10 MHz channels, though. */ 6003 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6004 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6005 return ret; 6006 6007 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6008 ieee80211_chanreq_downgrade(&chanreq, conn); 6009 6010 ret = ieee80211_link_use_channel(link, &chanreq, 6011 IEEE80211_CHANCTX_SHARED); 6012 } 6013 6014 return ret; 6015 } 6016 6017 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6018 u8 *dtim_count, u8 *dtim_period) 6019 { 6020 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6021 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6022 ies->len); 6023 const struct ieee80211_tim_ie *tim = NULL; 6024 const struct ieee80211_bssid_index *idx; 6025 bool valid = tim_ie && tim_ie[1] >= 2; 6026 6027 if (valid) 6028 tim = (void *)(tim_ie + 2); 6029 6030 if (dtim_count) 6031 *dtim_count = valid ? tim->dtim_count : 0; 6032 6033 if (dtim_period) 6034 *dtim_period = valid ? tim->dtim_period : 0; 6035 6036 /* Check if value is overridden by non-transmitted profile */ 6037 if (!idx_ie || idx_ie[1] < 3) 6038 return valid; 6039 6040 idx = (void *)(idx_ie + 2); 6041 6042 if (dtim_count) 6043 *dtim_count = idx->dtim_count; 6044 6045 if (dtim_period) 6046 *dtim_period = idx->dtim_period; 6047 6048 return true; 6049 } 6050 6051 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6052 struct ieee80211_mgmt *mgmt, 6053 struct ieee802_11_elems *elems, 6054 const u8 *elem_start, unsigned int elem_len) 6055 { 6056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6057 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6058 struct ieee80211_local *local = sdata->local; 6059 unsigned int link_id; 6060 struct sta_info *sta; 6061 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6062 u16 valid_links = 0, dormant_links = 0; 6063 int err; 6064 6065 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6066 /* 6067 * station info was already allocated and inserted before 6068 * the association and should be available to us 6069 */ 6070 sta = sta_info_get(sdata, assoc_data->ap_addr); 6071 if (WARN_ON(!sta)) 6072 goto out_err; 6073 6074 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6075 6076 if (ieee80211_vif_is_mld(&sdata->vif)) { 6077 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6078 if (!assoc_data->link[link_id].bss) 6079 continue; 6080 6081 valid_links |= BIT(link_id); 6082 if (assoc_data->link[link_id].disabled) 6083 dormant_links |= BIT(link_id); 6084 6085 if (link_id != assoc_data->assoc_link_id) { 6086 err = ieee80211_sta_allocate_link(sta, link_id); 6087 if (err) 6088 goto out_err; 6089 } 6090 } 6091 6092 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6093 } 6094 6095 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6096 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6097 struct ieee80211_link_data *link; 6098 struct link_sta_info *link_sta; 6099 6100 if (!cbss) 6101 continue; 6102 6103 link = sdata_dereference(sdata->link[link_id], sdata); 6104 if (WARN_ON(!link)) 6105 goto out_err; 6106 6107 if (ieee80211_vif_is_mld(&sdata->vif)) 6108 link_info(link, 6109 "local address %pM, AP link address %pM%s\n", 6110 link->conf->addr, 6111 assoc_data->link[link_id].bss->bssid, 6112 link_id == assoc_data->assoc_link_id ? 6113 " (assoc)" : ""); 6114 6115 link_sta = rcu_dereference_protected(sta->link[link_id], 6116 lockdep_is_held(&local->hw.wiphy->mtx)); 6117 if (WARN_ON(!link_sta)) 6118 goto out_err; 6119 6120 if (!link->u.mgd.have_beacon) { 6121 const struct cfg80211_bss_ies *ies; 6122 6123 rcu_read_lock(); 6124 ies = rcu_dereference(cbss->beacon_ies); 6125 if (ies) 6126 link->u.mgd.have_beacon = true; 6127 else 6128 ies = rcu_dereference(cbss->ies); 6129 ieee80211_get_dtim(ies, 6130 &link->conf->sync_dtim_count, 6131 &link->u.mgd.dtim_period); 6132 link->conf->beacon_int = cbss->beacon_interval; 6133 rcu_read_unlock(); 6134 } 6135 6136 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6137 6138 if (link_id != assoc_data->assoc_link_id) { 6139 link->u.mgd.conn = assoc_data->link[link_id].conn; 6140 6141 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6142 true, &link->u.mgd.conn, 6143 sdata->u.mgd.userspace_selectors); 6144 if (err) { 6145 link_info(link, "prep_channel failed\n"); 6146 goto out_err; 6147 } 6148 } 6149 6150 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6151 assoc_data->link[link_id].bss); 6152 if (err) 6153 goto out_err; 6154 6155 if (!ieee80211_assoc_config_link(link, link_sta, 6156 assoc_data->link[link_id].bss, 6157 mgmt, elem_start, elem_len, 6158 &changed[link_id])) 6159 goto out_err; 6160 6161 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6162 valid_links &= ~BIT(link_id); 6163 ieee80211_sta_remove_link(sta, link_id); 6164 continue; 6165 } 6166 6167 if (link_id != assoc_data->assoc_link_id) { 6168 err = ieee80211_sta_activate_link(sta, link_id); 6169 if (err) 6170 goto out_err; 6171 } 6172 } 6173 6174 /* links might have changed due to rejected ones, set them again */ 6175 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6176 6177 rate_control_rate_init_all_links(sta); 6178 6179 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6180 set_sta_flag(sta, WLAN_STA_MFP); 6181 sta->sta.mfp = true; 6182 } else { 6183 sta->sta.mfp = false; 6184 } 6185 6186 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6187 elems->ext_capab_len); 6188 6189 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6190 local->hw.queues >= IEEE80211_NUM_ACS; 6191 6192 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6193 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6194 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6195 if (err) { 6196 sdata_info(sdata, 6197 "failed to move station %pM to desired state\n", 6198 sta->sta.addr); 6199 WARN_ON(__sta_info_destroy(sta)); 6200 goto out_err; 6201 } 6202 6203 if (sdata->wdev.use_4addr) 6204 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6205 6206 ieee80211_set_associated(sdata, assoc_data, changed); 6207 6208 /* 6209 * If we're using 4-addr mode, let the AP know that we're 6210 * doing so, so that it can create the STA VLAN on its side 6211 */ 6212 if (ifmgd->use_4addr) 6213 ieee80211_send_4addr_nullfunc(local, sdata); 6214 6215 /* 6216 * Start timer to probe the connection to the AP now. 6217 * Also start the timer that will detect beacon loss. 6218 */ 6219 ieee80211_sta_reset_beacon_monitor(sdata); 6220 ieee80211_sta_reset_conn_monitor(sdata); 6221 6222 return true; 6223 out_err: 6224 eth_zero_addr(sdata->vif.cfg.ap_addr); 6225 return false; 6226 } 6227 6228 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6229 struct ieee80211_mgmt *mgmt, 6230 size_t len) 6231 { 6232 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6233 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6234 u16 capab_info, status_code, aid; 6235 struct ieee80211_elems_parse_params parse_params = { 6236 .bss = NULL, 6237 .link_id = -1, 6238 .from_ap = true, 6239 }; 6240 struct ieee802_11_elems *elems; 6241 int ac; 6242 const u8 *elem_start; 6243 unsigned int elem_len; 6244 bool reassoc; 6245 struct ieee80211_event event = { 6246 .type = MLME_EVENT, 6247 .u.mlme.data = ASSOC_EVENT, 6248 }; 6249 struct ieee80211_prep_tx_info info = {}; 6250 struct cfg80211_rx_assoc_resp_data resp = { 6251 .uapsd_queues = -1, 6252 }; 6253 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6254 unsigned int link_id; 6255 6256 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6257 6258 if (!assoc_data) 6259 return; 6260 6261 info.link_id = assoc_data->assoc_link_id; 6262 6263 parse_params.mode = 6264 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6265 6266 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6267 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6268 return; 6269 6270 /* 6271 * AssocResp and ReassocResp have identical structure, so process both 6272 * of them in this function. 6273 */ 6274 6275 if (len < 24 + 6) 6276 return; 6277 6278 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6279 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6280 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6281 if (assoc_data->s1g) 6282 elem_start = mgmt->u.s1g_assoc_resp.variable; 6283 else 6284 elem_start = mgmt->u.assoc_resp.variable; 6285 6286 /* 6287 * Note: this may not be perfect, AP might misbehave - if 6288 * anyone needs to rely on perfect complete notification 6289 * with the exact right subtype, then we need to track what 6290 * we actually transmitted. 6291 */ 6292 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6293 IEEE80211_STYPE_ASSOC_REQ; 6294 6295 if (assoc_data->fils_kek_len && 6296 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6297 return; 6298 6299 elem_len = len - (elem_start - (u8 *)mgmt); 6300 parse_params.start = elem_start; 6301 parse_params.len = elem_len; 6302 elems = ieee802_11_parse_elems_full(&parse_params); 6303 if (!elems) 6304 goto notify_driver; 6305 6306 if (elems->aid_resp) 6307 aid = le16_to_cpu(elems->aid_resp->aid); 6308 else if (assoc_data->s1g) 6309 aid = 0; /* TODO */ 6310 else 6311 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6312 6313 /* 6314 * The 5 MSB of the AID field are reserved 6315 * (802.11-2016 9.4.1.8 AID field) 6316 */ 6317 aid &= 0x7ff; 6318 6319 sdata_info(sdata, 6320 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6321 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6322 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6323 6324 ifmgd->broken_ap = false; 6325 6326 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6327 elems->timeout_int && 6328 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6329 u32 tu, ms; 6330 6331 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6332 le32_to_cpu(elems->timeout_int->value)); 6333 6334 tu = le32_to_cpu(elems->timeout_int->value); 6335 ms = tu * 1024 / 1000; 6336 sdata_info(sdata, 6337 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6338 assoc_data->ap_addr, tu, ms); 6339 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6340 assoc_data->timeout_started = true; 6341 assoc_data->comeback = true; 6342 if (ms > IEEE80211_ASSOC_TIMEOUT) 6343 run_again(sdata, assoc_data->timeout); 6344 goto notify_driver; 6345 } 6346 6347 if (status_code != WLAN_STATUS_SUCCESS) { 6348 sdata_info(sdata, "%pM denied association (code=%d)\n", 6349 assoc_data->ap_addr, status_code); 6350 event.u.mlme.status = MLME_DENIED; 6351 event.u.mlme.reason = status_code; 6352 drv_event_callback(sdata->local, sdata, &event); 6353 } else { 6354 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6355 sdata_info(sdata, 6356 "invalid AID value %d (out of range), turn off PS\n", 6357 aid); 6358 aid = 0; 6359 ifmgd->broken_ap = true; 6360 } 6361 6362 if (ieee80211_vif_is_mld(&sdata->vif)) { 6363 struct ieee80211_mle_basic_common_info *common; 6364 6365 if (!elems->ml_basic) { 6366 sdata_info(sdata, 6367 "MLO association with %pM but no (basic) multi-link element in response!\n", 6368 assoc_data->ap_addr); 6369 goto abandon_assoc; 6370 } 6371 6372 common = (void *)elems->ml_basic->variable; 6373 6374 if (memcmp(assoc_data->ap_addr, 6375 common->mld_mac_addr, ETH_ALEN)) { 6376 sdata_info(sdata, 6377 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6378 common->mld_mac_addr, 6379 assoc_data->ap_addr); 6380 goto abandon_assoc; 6381 } 6382 6383 sdata->vif.cfg.eml_cap = 6384 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6385 sdata->vif.cfg.eml_med_sync_delay = 6386 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6387 sdata->vif.cfg.mld_capa_op = 6388 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6389 } 6390 6391 sdata->vif.cfg.aid = aid; 6392 6393 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6394 elem_start, elem_len)) { 6395 /* oops -- internal error -- send timeout for now */ 6396 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6397 goto notify_driver; 6398 } 6399 event.u.mlme.status = MLME_SUCCESS; 6400 drv_event_callback(sdata->local, sdata, &event); 6401 sdata_info(sdata, "associated\n"); 6402 6403 info.success = 1; 6404 } 6405 6406 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6407 struct ieee80211_link_data *link; 6408 6409 if (!assoc_data->link[link_id].bss) 6410 continue; 6411 6412 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6413 ether_addr_copy(resp.links[link_id].addr, 6414 assoc_data->link[link_id].addr); 6415 resp.links[link_id].status = assoc_data->link[link_id].status; 6416 6417 link = sdata_dereference(sdata->link[link_id], sdata); 6418 if (!link) 6419 continue; 6420 6421 /* get uapsd queues configuration - same for all links */ 6422 resp.uapsd_queues = 0; 6423 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6424 if (link->tx_conf[ac].uapsd) 6425 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6426 } 6427 6428 if (ieee80211_vif_is_mld(&sdata->vif)) { 6429 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6430 resp.ap_mld_addr = ap_mld_addr; 6431 } 6432 6433 ieee80211_destroy_assoc_data(sdata, 6434 status_code == WLAN_STATUS_SUCCESS ? 6435 ASSOC_SUCCESS : 6436 ASSOC_REJECTED); 6437 6438 resp.buf = (u8 *)mgmt; 6439 resp.len = len; 6440 resp.req_ies = ifmgd->assoc_req_ies; 6441 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6442 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6443 notify_driver: 6444 drv_mgd_complete_tx(sdata->local, sdata, &info); 6445 kfree(elems); 6446 return; 6447 abandon_assoc: 6448 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6449 goto notify_driver; 6450 } 6451 6452 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6453 struct ieee80211_mgmt *mgmt, size_t len, 6454 struct ieee80211_rx_status *rx_status) 6455 { 6456 struct ieee80211_sub_if_data *sdata = link->sdata; 6457 struct ieee80211_local *local = sdata->local; 6458 struct ieee80211_bss *bss; 6459 struct ieee80211_channel *channel; 6460 6461 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6462 6463 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6464 ieee80211_rx_status_to_khz(rx_status)); 6465 if (!channel) 6466 return; 6467 6468 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6469 if (bss) { 6470 link->conf->beacon_rate = bss->beacon_rate; 6471 ieee80211_rx_bss_put(local, bss); 6472 } 6473 } 6474 6475 6476 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6477 struct sk_buff *skb) 6478 { 6479 struct ieee80211_sub_if_data *sdata = link->sdata; 6480 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6481 struct ieee80211_if_managed *ifmgd; 6482 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6483 struct ieee80211_channel *channel; 6484 size_t baselen, len = skb->len; 6485 6486 ifmgd = &sdata->u.mgd; 6487 6488 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6489 6490 /* 6491 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6492 * "If a 6 GHz AP receives a Probe Request frame and responds with 6493 * a Probe Response frame [..], the Address 1 field of the Probe 6494 * Response frame shall be set to the broadcast address [..]" 6495 * So, on 6GHz band we should also accept broadcast responses. 6496 */ 6497 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6498 rx_status->freq); 6499 if (!channel) 6500 return; 6501 6502 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6503 (channel->band != NL80211_BAND_6GHZ || 6504 !is_broadcast_ether_addr(mgmt->da))) 6505 return; /* ignore ProbeResp to foreign address */ 6506 6507 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6508 if (baselen > len) 6509 return; 6510 6511 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6512 6513 if (ifmgd->associated && 6514 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6515 ieee80211_reset_ap_probe(sdata); 6516 } 6517 6518 /* 6519 * This is the canonical list of information elements we care about, 6520 * the filter code also gives us all changes to the Microsoft OUI 6521 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6522 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6523 * changes to requested client power. 6524 * 6525 * We implement beacon filtering in software since that means we can 6526 * avoid processing the frame here and in cfg80211, and userspace 6527 * will not be able to tell whether the hardware supports it or not. 6528 * 6529 * XXX: This list needs to be dynamic -- userspace needs to be able to 6530 * add items it requires. It also needs to be able to tell us to 6531 * look out for other vendor IEs. 6532 */ 6533 static const u64 care_about_ies = 6534 (1ULL << WLAN_EID_COUNTRY) | 6535 (1ULL << WLAN_EID_ERP_INFO) | 6536 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6537 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6538 (1ULL << WLAN_EID_HT_CAPABILITY) | 6539 (1ULL << WLAN_EID_HT_OPERATION) | 6540 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6541 6542 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6543 struct ieee80211_if_managed *ifmgd, 6544 struct ieee80211_bss_conf *bss_conf, 6545 struct ieee80211_local *local, 6546 struct ieee80211_rx_status *rx_status) 6547 { 6548 struct ieee80211_sub_if_data *sdata = link->sdata; 6549 6550 /* Track average RSSI from the Beacon frames of the current AP */ 6551 6552 if (!link->u.mgd.tracking_signal_avg) { 6553 link->u.mgd.tracking_signal_avg = true; 6554 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6555 link->u.mgd.last_cqm_event_signal = 0; 6556 link->u.mgd.count_beacon_signal = 1; 6557 link->u.mgd.last_ave_beacon_signal = 0; 6558 } else { 6559 link->u.mgd.count_beacon_signal++; 6560 } 6561 6562 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6563 -rx_status->signal); 6564 6565 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6566 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6567 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6568 int last_sig = link->u.mgd.last_ave_beacon_signal; 6569 struct ieee80211_event event = { 6570 .type = RSSI_EVENT, 6571 }; 6572 6573 /* 6574 * if signal crosses either of the boundaries, invoke callback 6575 * with appropriate parameters 6576 */ 6577 if (sig > ifmgd->rssi_max_thold && 6578 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6579 link->u.mgd.last_ave_beacon_signal = sig; 6580 event.u.rssi.data = RSSI_EVENT_HIGH; 6581 drv_event_callback(local, sdata, &event); 6582 } else if (sig < ifmgd->rssi_min_thold && 6583 (last_sig >= ifmgd->rssi_max_thold || 6584 last_sig == 0)) { 6585 link->u.mgd.last_ave_beacon_signal = sig; 6586 event.u.rssi.data = RSSI_EVENT_LOW; 6587 drv_event_callback(local, sdata, &event); 6588 } 6589 } 6590 6591 if (bss_conf->cqm_rssi_thold && 6592 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6593 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6594 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6595 int last_event = link->u.mgd.last_cqm_event_signal; 6596 int thold = bss_conf->cqm_rssi_thold; 6597 int hyst = bss_conf->cqm_rssi_hyst; 6598 6599 if (sig < thold && 6600 (last_event == 0 || sig < last_event - hyst)) { 6601 link->u.mgd.last_cqm_event_signal = sig; 6602 ieee80211_cqm_rssi_notify( 6603 &sdata->vif, 6604 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6605 sig, GFP_KERNEL); 6606 } else if (sig > thold && 6607 (last_event == 0 || sig > last_event + hyst)) { 6608 link->u.mgd.last_cqm_event_signal = sig; 6609 ieee80211_cqm_rssi_notify( 6610 &sdata->vif, 6611 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6612 sig, GFP_KERNEL); 6613 } 6614 } 6615 6616 if (bss_conf->cqm_rssi_low && 6617 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6618 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6619 int last_event = link->u.mgd.last_cqm_event_signal; 6620 int low = bss_conf->cqm_rssi_low; 6621 int high = bss_conf->cqm_rssi_high; 6622 6623 if (sig < low && 6624 (last_event == 0 || last_event >= low)) { 6625 link->u.mgd.last_cqm_event_signal = sig; 6626 ieee80211_cqm_rssi_notify( 6627 &sdata->vif, 6628 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6629 sig, GFP_KERNEL); 6630 } else if (sig > high && 6631 (last_event == 0 || last_event <= high)) { 6632 link->u.mgd.last_cqm_event_signal = sig; 6633 ieee80211_cqm_rssi_notify( 6634 &sdata->vif, 6635 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6636 sig, GFP_KERNEL); 6637 } 6638 } 6639 } 6640 6641 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6642 struct cfg80211_bss *bss) 6643 { 6644 if (ether_addr_equal(tx_bssid, bss->bssid)) 6645 return true; 6646 if (!bss->transmitted_bss) 6647 return false; 6648 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6649 } 6650 6651 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6652 struct wiphy_work *work) 6653 { 6654 struct ieee80211_sub_if_data *sdata = 6655 container_of(work, struct ieee80211_sub_if_data, 6656 u.mgd.ml_reconf_work.work); 6657 u16 new_valid_links, new_active_links, new_dormant_links; 6658 int ret; 6659 6660 if (!sdata->u.mgd.removed_links) 6661 return; 6662 6663 sdata_info(sdata, 6664 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6665 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6666 6667 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6668 if (new_valid_links == sdata->vif.valid_links) 6669 return; 6670 6671 if (!new_valid_links || 6672 !(new_valid_links & ~sdata->vif.dormant_links)) { 6673 sdata_info(sdata, "No valid links after reconfiguration\n"); 6674 ret = -EINVAL; 6675 goto out; 6676 } 6677 6678 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6679 if (new_active_links != sdata->vif.active_links) { 6680 if (!new_active_links) 6681 new_active_links = 6682 BIT(ffs(new_valid_links & 6683 ~sdata->vif.dormant_links) - 1); 6684 6685 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6686 if (ret) { 6687 sdata_info(sdata, 6688 "Failed setting active links\n"); 6689 goto out; 6690 } 6691 } 6692 6693 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6694 6695 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6696 new_dormant_links); 6697 if (ret) 6698 sdata_info(sdata, "Failed setting valid links\n"); 6699 6700 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6701 6702 out: 6703 if (!ret) 6704 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6705 else 6706 __ieee80211_disconnect(sdata); 6707 6708 sdata->u.mgd.removed_links = 0; 6709 } 6710 6711 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6712 struct ieee802_11_elems *elems) 6713 { 6714 const struct element *sub; 6715 unsigned long removed_links = 0; 6716 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6717 u8 link_id; 6718 u32 delay; 6719 6720 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6721 return; 6722 6723 /* Directly parse the sub elements as the common information doesn't 6724 * hold any useful information. 6725 */ 6726 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6727 elems->ml_reconf_len) { 6728 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6729 u8 *pos = prof->variable; 6730 u16 control; 6731 6732 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6733 continue; 6734 6735 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6736 sub->datalen)) 6737 return; 6738 6739 control = le16_to_cpu(prof->control); 6740 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6741 6742 removed_links |= BIT(link_id); 6743 6744 /* the MAC address should not be included, but handle it */ 6745 if (control & 6746 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6747 pos += 6; 6748 6749 /* According to Draft P802.11be_D3.0, the control should 6750 * include the AP Removal Timer present. If the AP Removal Timer 6751 * is not present assume immediate removal. 6752 */ 6753 if (control & 6754 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6755 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6756 } 6757 6758 removed_links &= sdata->vif.valid_links; 6759 if (!removed_links) { 6760 /* In case the removal was cancelled, abort it */ 6761 if (sdata->u.mgd.removed_links) { 6762 sdata->u.mgd.removed_links = 0; 6763 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6764 &sdata->u.mgd.ml_reconf_work); 6765 } 6766 return; 6767 } 6768 6769 delay = 0; 6770 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6771 struct ieee80211_bss_conf *link_conf = 6772 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6773 u32 link_delay; 6774 6775 if (!link_conf) { 6776 removed_links &= ~BIT(link_id); 6777 continue; 6778 } 6779 6780 if (link_removal_timeout[link_id] < 1) 6781 link_delay = 0; 6782 else 6783 link_delay = link_conf->beacon_int * 6784 (link_removal_timeout[link_id] - 1); 6785 6786 if (!delay) 6787 delay = link_delay; 6788 else 6789 delay = min(delay, link_delay); 6790 } 6791 6792 sdata->u.mgd.removed_links = removed_links; 6793 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6794 &sdata->u.mgd.ml_reconf_work, 6795 TU_TO_JIFFIES(delay)); 6796 } 6797 6798 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6799 u16 active_links, u16 dormant_links, 6800 u16 suspended_links) 6801 { 6802 u64 changed = 0; 6803 int ret; 6804 6805 if (!active_links) { 6806 ret = -EINVAL; 6807 goto out; 6808 } 6809 6810 /* If there is an active negotiated TTLM, it should be discarded by 6811 * the new negotiated/advertised TTLM. 6812 */ 6813 if (sdata->vif.neg_ttlm.valid) { 6814 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6815 sdata->vif.suspended_links = 0; 6816 changed = BSS_CHANGED_MLD_TTLM; 6817 } 6818 6819 if (sdata->vif.active_links != active_links) { 6820 /* usable links are affected when active_links are changed, 6821 * so notify the driver about the status change 6822 */ 6823 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6824 active_links &= sdata->vif.active_links; 6825 if (!active_links) 6826 active_links = 6827 BIT(__ffs(sdata->vif.valid_links & 6828 ~dormant_links)); 6829 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6830 if (ret) { 6831 sdata_info(sdata, "Failed to set TTLM active links\n"); 6832 goto out; 6833 } 6834 } 6835 6836 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6837 dormant_links); 6838 if (ret) { 6839 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6840 goto out; 6841 } 6842 6843 sdata->vif.suspended_links = suspended_links; 6844 if (sdata->vif.suspended_links) 6845 changed |= BSS_CHANGED_MLD_TTLM; 6846 6847 ieee80211_vif_cfg_change_notify(sdata, changed); 6848 6849 out: 6850 if (ret) 6851 ieee80211_disconnect(&sdata->vif, false); 6852 6853 return ret; 6854 } 6855 6856 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6857 struct wiphy_work *work) 6858 { 6859 u16 new_active_links, new_dormant_links; 6860 struct ieee80211_sub_if_data *sdata = 6861 container_of(work, struct ieee80211_sub_if_data, 6862 u.mgd.ttlm_work.work); 6863 6864 new_active_links = sdata->u.mgd.ttlm_info.map & 6865 sdata->vif.valid_links; 6866 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6867 sdata->vif.valid_links; 6868 6869 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6870 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6871 0)) 6872 return; 6873 6874 sdata->u.mgd.ttlm_info.active = true; 6875 sdata->u.mgd.ttlm_info.switch_time = 0; 6876 } 6877 6878 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6879 { 6880 if (bm_size == 1) 6881 return *data; 6882 else 6883 return get_unaligned_le16(data); 6884 } 6885 6886 static int 6887 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6888 const struct ieee80211_ttlm_elem *ttlm, 6889 struct ieee80211_adv_ttlm_info *ttlm_info) 6890 { 6891 /* The element size was already validated in 6892 * ieee80211_tid_to_link_map_size_ok() 6893 */ 6894 u8 control, link_map_presence, map_size, tid; 6895 u8 *pos; 6896 6897 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6898 pos = (void *)ttlm->optional; 6899 control = ttlm->control; 6900 6901 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6902 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6903 return 0; 6904 6905 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6906 IEEE80211_TTLM_DIRECTION_BOTH) { 6907 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6908 return -EINVAL; 6909 } 6910 6911 link_map_presence = *pos; 6912 pos++; 6913 6914 ttlm_info->switch_time = get_unaligned_le16(pos); 6915 6916 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6917 * by 1. 6918 */ 6919 if (!ttlm_info->switch_time) 6920 ttlm_info->switch_time = 1; 6921 6922 pos += 2; 6923 6924 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6925 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6926 pos += 3; 6927 } 6928 6929 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6930 map_size = 1; 6931 else 6932 map_size = 2; 6933 6934 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6935 * not advertise a TID-to-link mapping that does not map all TIDs to the 6936 * same link set, reject frame if not all links have mapping 6937 */ 6938 if (link_map_presence != 0xff) { 6939 sdata_info(sdata, 6940 "Invalid advertised T2L mapping presence indicator\n"); 6941 return -EINVAL; 6942 } 6943 6944 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6945 if (!ttlm_info->map) { 6946 sdata_info(sdata, 6947 "Invalid advertised T2L map for TID 0\n"); 6948 return -EINVAL; 6949 } 6950 6951 pos += map_size; 6952 6953 for (tid = 1; tid < 8; tid++) { 6954 u16 map = ieee80211_get_ttlm(map_size, pos); 6955 6956 if (map != ttlm_info->map) { 6957 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6958 tid); 6959 return -EINVAL; 6960 } 6961 6962 pos += map_size; 6963 } 6964 return 0; 6965 } 6966 6967 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6968 struct ieee802_11_elems *elems, 6969 u64 beacon_ts) 6970 { 6971 u8 i; 6972 int ret; 6973 6974 if (!ieee80211_vif_is_mld(&sdata->vif)) 6975 return; 6976 6977 if (!elems->ttlm_num) { 6978 if (sdata->u.mgd.ttlm_info.switch_time) { 6979 /* if a planned TID-to-link mapping was cancelled - 6980 * abort it 6981 */ 6982 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6983 &sdata->u.mgd.ttlm_work); 6984 } else if (sdata->u.mgd.ttlm_info.active) { 6985 /* if no TID-to-link element, set to default mapping in 6986 * which all TIDs are mapped to all setup links 6987 */ 6988 ret = ieee80211_vif_set_links(sdata, 6989 sdata->vif.valid_links, 6990 0); 6991 if (ret) { 6992 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6993 return; 6994 } 6995 ieee80211_vif_cfg_change_notify(sdata, 6996 BSS_CHANGED_MLD_VALID_LINKS); 6997 } 6998 memset(&sdata->u.mgd.ttlm_info, 0, 6999 sizeof(sdata->u.mgd.ttlm_info)); 7000 return; 7001 } 7002 7003 for (i = 0; i < elems->ttlm_num; i++) { 7004 struct ieee80211_adv_ttlm_info ttlm_info; 7005 u32 res; 7006 7007 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7008 &ttlm_info); 7009 7010 if (res) { 7011 __ieee80211_disconnect(sdata); 7012 return; 7013 } 7014 7015 if (ttlm_info.switch_time) { 7016 u16 beacon_ts_tu, st_tu, delay; 7017 u32 delay_jiffies; 7018 u64 mask; 7019 7020 /* The t2l map switch time is indicated with a partial 7021 * TSF value (bits 10 to 25), get the partial beacon TS 7022 * as well, and calc the delay to the start time. 7023 */ 7024 mask = GENMASK_ULL(25, 10); 7025 beacon_ts_tu = (beacon_ts & mask) >> 10; 7026 st_tu = ttlm_info.switch_time; 7027 delay = st_tu - beacon_ts_tu; 7028 7029 /* 7030 * If the switch time is far in the future, then it 7031 * could also be the previous switch still being 7032 * announced. 7033 * We can simply ignore it for now, if it is a future 7034 * switch the AP will continue to announce it anyway. 7035 */ 7036 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7037 return; 7038 7039 delay_jiffies = TU_TO_JIFFIES(delay); 7040 7041 /* Link switching can take time, so schedule it 7042 * 100ms before to be ready on time 7043 */ 7044 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7045 delay_jiffies -= 7046 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7047 else 7048 delay_jiffies = 0; 7049 7050 sdata->u.mgd.ttlm_info = ttlm_info; 7051 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7052 &sdata->u.mgd.ttlm_work); 7053 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7054 &sdata->u.mgd.ttlm_work, 7055 delay_jiffies); 7056 return; 7057 } 7058 } 7059 } 7060 7061 static void 7062 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7063 int reporting_link_id, 7064 struct ieee802_11_elems *elems) 7065 { 7066 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7067 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7068 const struct element *sub; 7069 const u8 *subelems; 7070 size_t subelems_len; 7071 u8 common_size; 7072 int link_id; 7073 7074 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7075 return; 7076 7077 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7078 subelems = (u8 *)elems->ml_basic + common_size; 7079 subelems_len = elems->ml_basic_len - common_size; 7080 7081 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7082 subelems, subelems_len) { 7083 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7084 struct ieee80211_link_data *link; 7085 ssize_t len; 7086 7087 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7088 sub->datalen)) 7089 continue; 7090 7091 link_id = le16_get_bits(prof->control, 7092 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7093 /* need a valid link ID, but also not our own, both AP bugs */ 7094 if (link_id == reporting_link_id || 7095 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7096 continue; 7097 7098 link = sdata_dereference(sdata->link[link_id], sdata); 7099 if (!link) 7100 continue; 7101 7102 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7103 NULL, 0, 7104 IEEE80211_MLE_SUBELEM_FRAGMENT); 7105 if (WARN_ON(len < 0)) 7106 continue; 7107 7108 sta_profiles[link_id] = sub; 7109 sta_profiles_len[link_id] = len; 7110 } 7111 7112 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7113 struct ieee80211_mle_per_sta_profile *prof; 7114 struct ieee802_11_elems *prof_elems; 7115 struct ieee80211_link_data *link; 7116 ssize_t len; 7117 7118 if (link_id == reporting_link_id) 7119 continue; 7120 7121 link = sdata_dereference(sdata->link[link_id], sdata); 7122 if (!link) 7123 continue; 7124 7125 if (!sta_profiles[link_id]) { 7126 prof_elems = NULL; 7127 goto handle; 7128 } 7129 7130 /* we can defragment in-place, won't use the buffer again */ 7131 len = cfg80211_defragment_element(sta_profiles[link_id], 7132 subelems, subelems_len, 7133 (void *)sta_profiles[link_id], 7134 sta_profiles_len[link_id], 7135 IEEE80211_MLE_SUBELEM_FRAGMENT); 7136 if (WARN_ON(len != sta_profiles_len[link_id])) 7137 continue; 7138 7139 prof = (void *)sta_profiles[link_id]; 7140 prof_elems = ieee802_11_parse_elems(prof->variable + 7141 (prof->sta_info_len - 1), 7142 len - 7143 (prof->sta_info_len - 1), 7144 false, NULL); 7145 7146 /* memory allocation failed - let's hope that's transient */ 7147 if (!prof_elems) 7148 continue; 7149 7150 handle: 7151 /* 7152 * FIXME: the timings here are obviously incorrect, 7153 * but only older Intel drivers seem to care, and 7154 * those don't have MLO. If you really need this, 7155 * the problem is having to calculate it with the 7156 * TSF offset etc. The device_timestamp is still 7157 * correct, of course. 7158 */ 7159 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7160 IEEE80211_CSA_SOURCE_OTHER_LINK); 7161 kfree(prof_elems); 7162 } 7163 } 7164 7165 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7166 const struct ieee802_11_elems *elems) 7167 { 7168 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7169 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7170 7171 if (!elems->ssid) 7172 return false; 7173 7174 /* hidden SSID: zero length */ 7175 if (elems->ssid_len == 0) 7176 return false; 7177 7178 if (elems->ssid_len != cfg->ssid_len) 7179 return true; 7180 7181 /* hidden SSID: zeroed out */ 7182 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7183 return false; 7184 7185 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7186 } 7187 7188 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7189 struct ieee80211_hdr *hdr, size_t len, 7190 struct ieee80211_rx_status *rx_status) 7191 { 7192 struct ieee80211_sub_if_data *sdata = link->sdata; 7193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7194 struct ieee80211_bss_conf *bss_conf = link->conf; 7195 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7196 struct ieee80211_mgmt *mgmt = (void *) hdr; 7197 size_t baselen; 7198 struct ieee802_11_elems *elems; 7199 struct ieee80211_local *local = sdata->local; 7200 struct ieee80211_chanctx_conf *chanctx_conf; 7201 struct ieee80211_supported_band *sband; 7202 struct ieee80211_channel *chan; 7203 struct link_sta_info *link_sta; 7204 struct sta_info *sta; 7205 u64 changed = 0; 7206 bool erp_valid; 7207 u8 erp_value = 0; 7208 u32 ncrc = 0; 7209 u8 *bssid, *variable = mgmt->u.beacon.variable; 7210 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7211 struct ieee80211_elems_parse_params parse_params = { 7212 .mode = link->u.mgd.conn.mode, 7213 .link_id = -1, 7214 .from_ap = true, 7215 }; 7216 7217 lockdep_assert_wiphy(local->hw.wiphy); 7218 7219 /* Process beacon from the current BSS */ 7220 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7221 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7222 struct ieee80211_ext *ext = (void *) mgmt; 7223 7224 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 7225 variable = ext->u.s1g_short_beacon.variable; 7226 else 7227 variable = ext->u.s1g_beacon.variable; 7228 } 7229 7230 baselen = (u8 *) variable - (u8 *) mgmt; 7231 if (baselen > len) 7232 return; 7233 7234 parse_params.start = variable; 7235 parse_params.len = len - baselen; 7236 7237 rcu_read_lock(); 7238 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7239 if (!chanctx_conf) { 7240 rcu_read_unlock(); 7241 return; 7242 } 7243 7244 if (ieee80211_rx_status_to_khz(rx_status) != 7245 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 7246 rcu_read_unlock(); 7247 return; 7248 } 7249 chan = chanctx_conf->def.chan; 7250 rcu_read_unlock(); 7251 7252 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7253 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7254 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7255 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7256 elems = ieee802_11_parse_elems_full(&parse_params); 7257 if (!elems) 7258 return; 7259 7260 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7261 7262 if (elems->dtim_period) 7263 link->u.mgd.dtim_period = elems->dtim_period; 7264 link->u.mgd.have_beacon = true; 7265 ifmgd->assoc_data->need_beacon = false; 7266 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7267 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7268 bss_conf->sync_tsf = 7269 le64_to_cpu(mgmt->u.beacon.timestamp); 7270 bss_conf->sync_device_ts = 7271 rx_status->device_timestamp; 7272 bss_conf->sync_dtim_count = elems->dtim_count; 7273 } 7274 7275 if (elems->mbssid_config_ie) 7276 bss_conf->profile_periodicity = 7277 elems->mbssid_config_ie->profile_periodicity; 7278 else 7279 bss_conf->profile_periodicity = 0; 7280 7281 if (elems->ext_capab_len >= 11 && 7282 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7283 bss_conf->ema_ap = true; 7284 else 7285 bss_conf->ema_ap = false; 7286 7287 /* continue assoc process */ 7288 ifmgd->assoc_data->timeout = jiffies; 7289 ifmgd->assoc_data->timeout_started = true; 7290 run_again(sdata, ifmgd->assoc_data->timeout); 7291 kfree(elems); 7292 return; 7293 } 7294 7295 if (!ifmgd->associated || 7296 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7297 return; 7298 bssid = link->u.mgd.bssid; 7299 7300 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7301 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7302 local, rx_status); 7303 7304 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7305 mlme_dbg_ratelimited(sdata, 7306 "cancelling AP probe due to a received beacon\n"); 7307 ieee80211_reset_ap_probe(sdata); 7308 } 7309 7310 /* 7311 * Push the beacon loss detection into the future since 7312 * we are processing a beacon from the AP just now. 7313 */ 7314 ieee80211_sta_reset_beacon_monitor(sdata); 7315 7316 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7317 * element (which carries the beacon interval). Don't forget to add a 7318 * bit to care_about_ies[] above if mac80211 is interested in a 7319 * changing S1G element. 7320 */ 7321 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7322 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7323 parse_params.bss = bss_conf->bss; 7324 parse_params.filter = care_about_ies; 7325 parse_params.crc = ncrc; 7326 elems = ieee802_11_parse_elems_full(&parse_params); 7327 if (!elems) 7328 return; 7329 7330 if (rx_status->flag & RX_FLAG_DECRYPTED && 7331 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7332 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7333 sdata->vif.cfg.ap_addr); 7334 __ieee80211_disconnect(sdata); 7335 return; 7336 } 7337 7338 ncrc = elems->crc; 7339 7340 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7341 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7342 if (local->hw.conf.dynamic_ps_timeout > 0) { 7343 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7344 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7345 ieee80211_hw_config(local, 7346 IEEE80211_CONF_CHANGE_PS); 7347 } 7348 ieee80211_send_nullfunc(local, sdata, false); 7349 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7350 local->pspolling = true; 7351 7352 /* 7353 * Here is assumed that the driver will be 7354 * able to send ps-poll frame and receive a 7355 * response even though power save mode is 7356 * enabled, but some drivers might require 7357 * to disable power save here. This needs 7358 * to be investigated. 7359 */ 7360 ieee80211_send_pspoll(local, sdata); 7361 } 7362 } 7363 7364 if (sdata->vif.p2p || 7365 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7366 struct ieee80211_p2p_noa_attr noa = {}; 7367 int ret; 7368 7369 ret = cfg80211_get_p2p_attr(variable, 7370 len - baselen, 7371 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7372 (u8 *) &noa, sizeof(noa)); 7373 if (ret >= 2) { 7374 if (link->u.mgd.p2p_noa_index != noa.index) { 7375 /* valid noa_attr and index changed */ 7376 link->u.mgd.p2p_noa_index = noa.index; 7377 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7378 changed |= BSS_CHANGED_P2P_PS; 7379 /* 7380 * make sure we update all information, the CRC 7381 * mechanism doesn't look at P2P attributes. 7382 */ 7383 link->u.mgd.beacon_crc_valid = false; 7384 } 7385 } else if (link->u.mgd.p2p_noa_index != -1) { 7386 /* noa_attr not found and we had valid noa_attr before */ 7387 link->u.mgd.p2p_noa_index = -1; 7388 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7389 changed |= BSS_CHANGED_P2P_PS; 7390 link->u.mgd.beacon_crc_valid = false; 7391 } 7392 } 7393 7394 /* 7395 * Update beacon timing and dtim count on every beacon appearance. This 7396 * will allow the driver to use the most updated values. Do it before 7397 * comparing this one with last received beacon. 7398 * IMPORTANT: These parameters would possibly be out of sync by the time 7399 * the driver will use them. The synchronized view is currently 7400 * guaranteed only in certain callbacks. 7401 */ 7402 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7403 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7404 bss_conf->sync_tsf = 7405 le64_to_cpu(mgmt->u.beacon.timestamp); 7406 bss_conf->sync_device_ts = 7407 rx_status->device_timestamp; 7408 bss_conf->sync_dtim_count = elems->dtim_count; 7409 } 7410 7411 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7412 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 7413 goto free; 7414 link->u.mgd.beacon_crc = ncrc; 7415 link->u.mgd.beacon_crc_valid = true; 7416 7417 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7418 7419 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7420 rx_status->device_timestamp, 7421 elems, elems, 7422 IEEE80211_CSA_SOURCE_BEACON); 7423 7424 /* note that after this elems->ml_basic can no longer be used fully */ 7425 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7426 7427 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7428 7429 if (!sdata->u.mgd.epcs.enabled && 7430 !link->u.mgd.disable_wmm_tracking && 7431 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7432 elems->wmm_param_len, 7433 elems->mu_edca_param_set)) 7434 changed |= BSS_CHANGED_QOS; 7435 7436 /* 7437 * If we haven't had a beacon before, tell the driver about the 7438 * DTIM period (and beacon timing if desired) now. 7439 */ 7440 if (!link->u.mgd.have_beacon) { 7441 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7442 bss_conf->dtim_period = elems->dtim_period ?: 1; 7443 7444 changed |= BSS_CHANGED_BEACON_INFO; 7445 link->u.mgd.have_beacon = true; 7446 7447 ieee80211_recalc_ps(local); 7448 7449 ieee80211_recalc_ps_vif(sdata); 7450 } 7451 7452 if (elems->erp_info) { 7453 erp_valid = true; 7454 erp_value = elems->erp_info[0]; 7455 } else { 7456 erp_valid = false; 7457 } 7458 7459 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7460 changed |= ieee80211_handle_bss_capability(link, 7461 le16_to_cpu(mgmt->u.beacon.capab_info), 7462 erp_valid, erp_value); 7463 7464 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7465 if (WARN_ON(!sta)) { 7466 goto free; 7467 } 7468 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7469 lockdep_is_held(&local->hw.wiphy->mtx)); 7470 if (WARN_ON(!link_sta)) { 7471 goto free; 7472 } 7473 7474 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7475 goto free; 7476 7477 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7478 7479 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7480 7481 if (ieee80211_config_bw(link, elems, true, &changed, "beacon")) { 7482 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7483 WLAN_REASON_DEAUTH_LEAVING, 7484 true, deauth_buf); 7485 ieee80211_report_disconnect(sdata, deauth_buf, 7486 sizeof(deauth_buf), true, 7487 WLAN_REASON_DEAUTH_LEAVING, 7488 false); 7489 goto free; 7490 } 7491 7492 if (elems->opmode_notif) 7493 ieee80211_vht_handle_opmode(sdata, link_sta, 7494 *elems->opmode_notif, 7495 rx_status->band); 7496 7497 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7498 elems->country_elem, 7499 elems->country_elem_len, 7500 elems->pwr_constr_elem, 7501 elems->cisco_dtpc_elem); 7502 7503 ieee80211_ml_reconfiguration(sdata, elems); 7504 ieee80211_process_adv_ttlm(sdata, elems, 7505 le64_to_cpu(mgmt->u.beacon.timestamp)); 7506 7507 ieee80211_link_info_change_notify(sdata, link, changed); 7508 free: 7509 kfree(elems); 7510 } 7511 7512 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7513 struct ieee80211_neg_ttlm neg_ttlm) 7514 { 7515 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7516 u8 i; 7517 7518 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7519 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7520 7521 /* If there is an active TTLM, unset previously suspended links */ 7522 if (sdata->vif.neg_ttlm.valid) 7523 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7524 7525 /* exclude links that are already disabled by advertised TTLM */ 7526 new_active_links = 7527 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7528 new_suspended_links = 7529 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7530 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7531 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7532 new_dormant_links, new_suspended_links)) 7533 return; 7534 7535 sdata->vif.neg_ttlm = neg_ttlm; 7536 sdata->vif.neg_ttlm.valid = true; 7537 } 7538 7539 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7540 struct wiphy_work *work) 7541 { 7542 struct ieee80211_sub_if_data *sdata = 7543 container_of(work, struct ieee80211_sub_if_data, 7544 u.mgd.neg_ttlm_timeout_work.work); 7545 7546 sdata_info(sdata, 7547 "No negotiated TTLM response from AP, disconnecting.\n"); 7548 7549 __ieee80211_disconnect(sdata); 7550 } 7551 7552 static void 7553 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7554 struct ieee80211_neg_ttlm *neg_ttlm) 7555 { 7556 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7557 7558 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7559 sizeof(neg_ttlm->downlink))) { 7560 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7561 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7562 } else { 7563 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7564 } 7565 7566 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7567 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7568 __le16 map; 7569 7570 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7571 7572 pos = skb_put(skb, len + 2); 7573 *pos++ = WLAN_EID_EXTENSION; 7574 len_pos = pos++; 7575 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7576 *pos++ = direction[i]; 7577 map_ind_pos = pos++; 7578 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7579 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7580 cpu_to_le16(neg_ttlm->uplink[tid]) : 7581 cpu_to_le16(neg_ttlm->downlink[tid]); 7582 if (!map) 7583 continue; 7584 7585 len += 2; 7586 map_ind |= BIT(tid); 7587 skb_put_data(skb, &map, sizeof(map)); 7588 } 7589 7590 *map_ind_pos = map_ind; 7591 *len_pos = len; 7592 7593 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7594 break; 7595 } 7596 } 7597 7598 static void 7599 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7600 struct ieee80211_neg_ttlm *neg_ttlm, 7601 u8 dialog_token) 7602 { 7603 struct ieee80211_local *local = sdata->local; 7604 struct ieee80211_mgmt *mgmt; 7605 struct sk_buff *skb; 7606 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7607 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7608 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7609 7610 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7611 if (!skb) 7612 return; 7613 7614 skb_reserve(skb, local->tx_headroom); 7615 mgmt = skb_put_zero(skb, hdr_len); 7616 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7617 IEEE80211_STYPE_ACTION); 7618 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7619 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7620 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7621 7622 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7623 mgmt->u.action.u.ttlm_req.action_code = 7624 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7625 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7626 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7627 ieee80211_tx_skb(sdata, skb); 7628 } 7629 7630 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7631 struct cfg80211_ttlm_params *params) 7632 { 7633 struct ieee80211_neg_ttlm neg_ttlm = {}; 7634 u8 i; 7635 7636 if (!ieee80211_vif_is_mld(&sdata->vif) || 7637 !(sdata->vif.cfg.mld_capa_op & 7638 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7639 return -EINVAL; 7640 7641 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7642 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7643 (params->ulink[i] & ~sdata->vif.valid_links)) 7644 return -EINVAL; 7645 7646 neg_ttlm.downlink[i] = params->dlink[i]; 7647 neg_ttlm.uplink[i] = params->ulink[i]; 7648 } 7649 7650 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7651 NEG_TTLM_RES_ACCEPT) 7652 return -EINVAL; 7653 7654 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7655 sdata->u.mgd.dialog_token_alloc++; 7656 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7657 sdata->u.mgd.dialog_token_alloc); 7658 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7659 &sdata->u.mgd.neg_ttlm_timeout_work); 7660 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7661 &sdata->u.mgd.neg_ttlm_timeout_work, 7662 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7663 return 0; 7664 } 7665 7666 static void 7667 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7668 enum ieee80211_neg_ttlm_res ttlm_res, 7669 u8 dialog_token, 7670 struct ieee80211_neg_ttlm *neg_ttlm) 7671 { 7672 struct ieee80211_local *local = sdata->local; 7673 struct ieee80211_mgmt *mgmt; 7674 struct sk_buff *skb; 7675 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7676 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7677 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7678 7679 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7680 if (!skb) 7681 return; 7682 7683 skb_reserve(skb, local->tx_headroom); 7684 mgmt = skb_put_zero(skb, hdr_len); 7685 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7686 IEEE80211_STYPE_ACTION); 7687 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7688 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7689 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7690 7691 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7692 mgmt->u.action.u.ttlm_res.action_code = 7693 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7694 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7695 switch (ttlm_res) { 7696 default: 7697 WARN_ON(1); 7698 fallthrough; 7699 case NEG_TTLM_RES_REJECT: 7700 mgmt->u.action.u.ttlm_res.status_code = 7701 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7702 break; 7703 case NEG_TTLM_RES_ACCEPT: 7704 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7705 break; 7706 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7707 mgmt->u.action.u.ttlm_res.status_code = 7708 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7709 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7710 break; 7711 } 7712 7713 ieee80211_tx_skb(sdata, skb); 7714 } 7715 7716 static int 7717 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7718 const struct ieee80211_ttlm_elem *ttlm, 7719 struct ieee80211_neg_ttlm *neg_ttlm, 7720 u8 *direction) 7721 { 7722 u8 control, link_map_presence, map_size, tid; 7723 u8 *pos; 7724 7725 /* The element size was already validated in 7726 * ieee80211_tid_to_link_map_size_ok() 7727 */ 7728 pos = (void *)ttlm->optional; 7729 7730 control = ttlm->control; 7731 7732 /* mapping switch time and expected duration fields are not expected 7733 * in case of negotiated TTLM 7734 */ 7735 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7736 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7737 mlme_dbg(sdata, 7738 "Invalid TTLM element in negotiated TTLM request\n"); 7739 return -EINVAL; 7740 } 7741 7742 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7743 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7744 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7745 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7746 } 7747 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7748 return 0; 7749 } 7750 7751 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7752 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7753 *direction != IEEE80211_TTLM_DIRECTION_UP && 7754 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7755 return -EINVAL; 7756 7757 link_map_presence = *pos; 7758 pos++; 7759 7760 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7761 map_size = 1; 7762 else 7763 map_size = 2; 7764 7765 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7766 u16 map; 7767 7768 if (link_map_presence & BIT(tid)) { 7769 map = ieee80211_get_ttlm(map_size, pos); 7770 if (!map) { 7771 mlme_dbg(sdata, 7772 "No active links for TID %d", tid); 7773 return -EINVAL; 7774 } 7775 } else { 7776 map = 0; 7777 } 7778 7779 switch (*direction) { 7780 case IEEE80211_TTLM_DIRECTION_BOTH: 7781 neg_ttlm->downlink[tid] = map; 7782 neg_ttlm->uplink[tid] = map; 7783 break; 7784 case IEEE80211_TTLM_DIRECTION_DOWN: 7785 neg_ttlm->downlink[tid] = map; 7786 break; 7787 case IEEE80211_TTLM_DIRECTION_UP: 7788 neg_ttlm->uplink[tid] = map; 7789 break; 7790 default: 7791 return -EINVAL; 7792 } 7793 pos += map_size; 7794 } 7795 return 0; 7796 } 7797 7798 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7799 struct ieee80211_mgmt *mgmt, size_t len) 7800 { 7801 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7802 size_t ies_len; 7803 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7804 struct ieee802_11_elems *elems = NULL; 7805 struct ieee80211_neg_ttlm neg_ttlm = {}; 7806 7807 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7808 7809 if (!ieee80211_vif_is_mld(&sdata->vif)) 7810 return; 7811 7812 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7813 ies_len = len - offsetof(struct ieee80211_mgmt, 7814 u.action.u.ttlm_req.variable); 7815 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7816 ies_len, true, NULL); 7817 if (!elems) { 7818 ttlm_res = NEG_TTLM_RES_REJECT; 7819 goto out; 7820 } 7821 7822 for (i = 0; i < elems->ttlm_num; i++) { 7823 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7824 &neg_ttlm, &direction[i]) || 7825 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7826 elems->ttlm_num != 1)) { 7827 ttlm_res = NEG_TTLM_RES_REJECT; 7828 goto out; 7829 } 7830 } 7831 7832 if (!elems->ttlm_num || 7833 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7834 ttlm_res = NEG_TTLM_RES_REJECT; 7835 goto out; 7836 } 7837 7838 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7839 if ((neg_ttlm.downlink[i] && 7840 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7841 (neg_ttlm.uplink[i] && 7842 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7843 ttlm_res = NEG_TTLM_RES_REJECT; 7844 goto out; 7845 } 7846 } 7847 7848 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7849 7850 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7851 goto out; 7852 7853 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7854 out: 7855 kfree(elems); 7856 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7857 } 7858 7859 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7860 struct ieee80211_mgmt *mgmt, size_t len) 7861 { 7862 if (!ieee80211_vif_is_mld(&sdata->vif) || 7863 mgmt->u.action.u.ttlm_req.dialog_token != 7864 sdata->u.mgd.dialog_token_alloc) 7865 return; 7866 7867 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7868 &sdata->u.mgd.neg_ttlm_timeout_work); 7869 7870 /* MLD station sends a TID to link mapping request, mainly to handle 7871 * BTM (BSS transition management) request, in which case it needs to 7872 * restrict the active links set. 7873 * In this case it's not expected that the MLD AP will reject the 7874 * negotiated TTLM request. 7875 * This can be better implemented in the future, to handle request 7876 * rejections. 7877 */ 7878 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7879 __ieee80211_disconnect(sdata); 7880 } 7881 7882 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 7883 { 7884 u16 new_dormant_links; 7885 7886 if (!sdata->vif.neg_ttlm.valid) 7887 return; 7888 7889 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7890 new_dormant_links = 7891 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7892 sdata->vif.suspended_links = 0; 7893 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7894 new_dormant_links); 7895 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7896 BSS_CHANGED_MLD_VALID_LINKS); 7897 } 7898 7899 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7900 struct wiphy_work *work) 7901 { 7902 struct ieee80211_sub_if_data *sdata = 7903 container_of(work, struct ieee80211_sub_if_data, 7904 u.mgd.teardown_ttlm_work); 7905 7906 ieee80211_process_ttlm_teardown(sdata); 7907 } 7908 7909 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7910 { 7911 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7912 struct ieee80211_local *local = sdata->local; 7913 struct ieee80211_mgmt *mgmt; 7914 struct sk_buff *skb; 7915 int frame_len = offsetofend(struct ieee80211_mgmt, 7916 u.action.u.ttlm_tear_down); 7917 struct ieee80211_tx_info *info; 7918 7919 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7920 if (!skb) 7921 return; 7922 7923 skb_reserve(skb, local->hw.extra_tx_headroom); 7924 mgmt = skb_put_zero(skb, frame_len); 7925 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7926 IEEE80211_STYPE_ACTION); 7927 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7928 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7929 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7930 7931 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7932 mgmt->u.action.u.ttlm_tear_down.action_code = 7933 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7934 7935 info = IEEE80211_SKB_CB(skb); 7936 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7937 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7938 ieee80211_tx_skb(sdata, skb); 7939 } 7940 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7941 7942 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7943 struct sk_buff *skb) 7944 { 7945 struct ieee80211_link_data *link = &sdata->deflink; 7946 struct ieee80211_rx_status *rx_status; 7947 struct ieee80211_hdr *hdr; 7948 u16 fc; 7949 7950 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7951 7952 rx_status = (struct ieee80211_rx_status *) skb->cb; 7953 hdr = (struct ieee80211_hdr *) skb->data; 7954 fc = le16_to_cpu(hdr->frame_control); 7955 7956 switch (fc & IEEE80211_FCTL_STYPE) { 7957 case IEEE80211_STYPE_S1G_BEACON: 7958 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7959 break; 7960 } 7961 } 7962 7963 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7964 struct sk_buff *skb) 7965 { 7966 struct ieee80211_link_data *link = &sdata->deflink; 7967 struct ieee80211_rx_status *rx_status; 7968 struct ieee802_11_elems *elems; 7969 struct ieee80211_mgmt *mgmt; 7970 u16 fc; 7971 int ies_len; 7972 7973 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7974 7975 rx_status = (struct ieee80211_rx_status *) skb->cb; 7976 mgmt = (struct ieee80211_mgmt *) skb->data; 7977 fc = le16_to_cpu(mgmt->frame_control); 7978 7979 if (rx_status->link_valid) { 7980 link = sdata_dereference(sdata->link[rx_status->link_id], 7981 sdata); 7982 if (!link) 7983 return; 7984 } 7985 7986 switch (fc & IEEE80211_FCTL_STYPE) { 7987 case IEEE80211_STYPE_BEACON: 7988 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7989 skb->len, rx_status); 7990 break; 7991 case IEEE80211_STYPE_PROBE_RESP: 7992 ieee80211_rx_mgmt_probe_resp(link, skb); 7993 break; 7994 case IEEE80211_STYPE_AUTH: 7995 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7996 break; 7997 case IEEE80211_STYPE_DEAUTH: 7998 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7999 break; 8000 case IEEE80211_STYPE_DISASSOC: 8001 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8002 break; 8003 case IEEE80211_STYPE_ASSOC_RESP: 8004 case IEEE80211_STYPE_REASSOC_RESP: 8005 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8006 break; 8007 case IEEE80211_STYPE_ACTION: 8008 if (!sdata->u.mgd.associated || 8009 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8010 break; 8011 8012 switch (mgmt->u.action.category) { 8013 case WLAN_CATEGORY_SPECTRUM_MGMT: 8014 ies_len = skb->len - 8015 offsetof(struct ieee80211_mgmt, 8016 u.action.u.chan_switch.variable); 8017 8018 if (ies_len < 0) 8019 break; 8020 8021 /* CSA IE cannot be overridden, no need for BSSID */ 8022 elems = ieee802_11_parse_elems( 8023 mgmt->u.action.u.chan_switch.variable, 8024 ies_len, true, NULL); 8025 8026 if (elems && !elems->parse_error) { 8027 enum ieee80211_csa_source src = 8028 IEEE80211_CSA_SOURCE_PROT_ACTION; 8029 8030 ieee80211_sta_process_chanswitch(link, 8031 rx_status->mactime, 8032 rx_status->device_timestamp, 8033 elems, elems, 8034 src); 8035 } 8036 kfree(elems); 8037 break; 8038 case WLAN_CATEGORY_PUBLIC: 8039 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8040 ies_len = skb->len - 8041 offsetof(struct ieee80211_mgmt, 8042 u.action.u.ext_chan_switch.variable); 8043 8044 if (ies_len < 0) 8045 break; 8046 8047 /* 8048 * extended CSA IE can't be overridden, no need for 8049 * BSSID 8050 */ 8051 elems = ieee802_11_parse_elems( 8052 mgmt->u.action.u.ext_chan_switch.variable, 8053 ies_len, true, NULL); 8054 8055 if (elems && !elems->parse_error) { 8056 enum ieee80211_csa_source src; 8057 8058 if (mgmt->u.action.category == 8059 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8060 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8061 else 8062 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8063 8064 /* for the handling code pretend it was an IE */ 8065 elems->ext_chansw_ie = 8066 &mgmt->u.action.u.ext_chan_switch.data; 8067 8068 ieee80211_sta_process_chanswitch(link, 8069 rx_status->mactime, 8070 rx_status->device_timestamp, 8071 elems, elems, 8072 src); 8073 } 8074 8075 kfree(elems); 8076 break; 8077 } 8078 break; 8079 } 8080 } 8081 8082 static void ieee80211_sta_timer(struct timer_list *t) 8083 { 8084 struct ieee80211_sub_if_data *sdata = 8085 from_timer(sdata, t, u.mgd.timer); 8086 8087 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8088 } 8089 8090 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8091 u8 reason, bool tx) 8092 { 8093 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8094 8095 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8096 tx, frame_buf); 8097 8098 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8099 reason, false); 8100 } 8101 8102 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8103 { 8104 struct ieee80211_local *local = sdata->local; 8105 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8106 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8107 u32 tx_flags = 0; 8108 u16 trans = 1; 8109 u16 status = 0; 8110 struct ieee80211_prep_tx_info info = { 8111 .subtype = IEEE80211_STYPE_AUTH, 8112 }; 8113 8114 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8115 8116 if (WARN_ON_ONCE(!auth_data)) 8117 return -EINVAL; 8118 8119 auth_data->tries++; 8120 8121 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8122 sdata_info(sdata, "authentication with %pM timed out\n", 8123 auth_data->ap_addr); 8124 8125 /* 8126 * Most likely AP is not in the range so remove the 8127 * bss struct for that AP. 8128 */ 8129 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8130 8131 return -ETIMEDOUT; 8132 } 8133 8134 if (auth_data->algorithm == WLAN_AUTH_SAE) 8135 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8136 8137 info.link_id = auth_data->link_id; 8138 drv_mgd_prepare_tx(local, sdata, &info); 8139 8140 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8141 auth_data->ap_addr, auth_data->tries, 8142 IEEE80211_AUTH_MAX_TRIES); 8143 8144 auth_data->expected_transaction = 2; 8145 8146 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8147 trans = auth_data->sae_trans; 8148 status = auth_data->sae_status; 8149 auth_data->expected_transaction = trans; 8150 } 8151 8152 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8153 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8154 IEEE80211_TX_INTFL_MLME_CONN_TX; 8155 8156 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8157 auth_data->data, auth_data->data_len, 8158 auth_data->ap_addr, auth_data->ap_addr, 8159 NULL, 0, 0, tx_flags); 8160 8161 if (tx_flags == 0) { 8162 if (auth_data->algorithm == WLAN_AUTH_SAE) 8163 auth_data->timeout = jiffies + 8164 IEEE80211_AUTH_TIMEOUT_SAE; 8165 else 8166 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8167 } else { 8168 auth_data->timeout = 8169 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8170 } 8171 8172 auth_data->timeout_started = true; 8173 run_again(sdata, auth_data->timeout); 8174 8175 return 0; 8176 } 8177 8178 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8179 { 8180 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8181 struct ieee80211_local *local = sdata->local; 8182 int ret; 8183 8184 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8185 8186 assoc_data->tries++; 8187 assoc_data->comeback = false; 8188 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8189 sdata_info(sdata, "association with %pM timed out\n", 8190 assoc_data->ap_addr); 8191 8192 /* 8193 * Most likely AP is not in the range so remove the 8194 * bss struct for that AP. 8195 */ 8196 cfg80211_unlink_bss(local->hw.wiphy, 8197 assoc_data->link[assoc_data->assoc_link_id].bss); 8198 8199 return -ETIMEDOUT; 8200 } 8201 8202 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8203 assoc_data->ap_addr, assoc_data->tries, 8204 IEEE80211_ASSOC_MAX_TRIES); 8205 ret = ieee80211_send_assoc(sdata); 8206 if (ret) 8207 return ret; 8208 8209 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8210 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8211 assoc_data->timeout_started = true; 8212 run_again(sdata, assoc_data->timeout); 8213 } else { 8214 assoc_data->timeout = 8215 round_jiffies_up(jiffies + 8216 IEEE80211_ASSOC_TIMEOUT_LONG); 8217 assoc_data->timeout_started = true; 8218 run_again(sdata, assoc_data->timeout); 8219 } 8220 8221 return 0; 8222 } 8223 8224 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8225 __le16 fc, bool acked) 8226 { 8227 struct ieee80211_local *local = sdata->local; 8228 8229 sdata->u.mgd.status_fc = fc; 8230 sdata->u.mgd.status_acked = acked; 8231 sdata->u.mgd.status_received = true; 8232 8233 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8234 } 8235 8236 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8237 { 8238 struct ieee80211_local *local = sdata->local; 8239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8240 8241 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8242 8243 if (ifmgd->status_received) { 8244 __le16 fc = ifmgd->status_fc; 8245 bool status_acked = ifmgd->status_acked; 8246 8247 ifmgd->status_received = false; 8248 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8249 if (status_acked) { 8250 if (ifmgd->auth_data->algorithm == 8251 WLAN_AUTH_SAE) 8252 ifmgd->auth_data->timeout = 8253 jiffies + 8254 IEEE80211_AUTH_TIMEOUT_SAE; 8255 else 8256 ifmgd->auth_data->timeout = 8257 jiffies + 8258 IEEE80211_AUTH_TIMEOUT_SHORT; 8259 run_again(sdata, ifmgd->auth_data->timeout); 8260 } else { 8261 ifmgd->auth_data->timeout = jiffies - 1; 8262 } 8263 ifmgd->auth_data->timeout_started = true; 8264 } else if (ifmgd->assoc_data && 8265 !ifmgd->assoc_data->comeback && 8266 (ieee80211_is_assoc_req(fc) || 8267 ieee80211_is_reassoc_req(fc))) { 8268 /* 8269 * Update association timeout based on the TX status 8270 * for the (Re)Association Request frame. Skip this if 8271 * we have already processed a (Re)Association Response 8272 * frame that indicated need for association comeback 8273 * at a specific time in the future. This could happen 8274 * if the TX status information is delayed enough for 8275 * the response to be received and processed first. 8276 */ 8277 if (status_acked) { 8278 ifmgd->assoc_data->timeout = 8279 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8280 run_again(sdata, ifmgd->assoc_data->timeout); 8281 } else { 8282 ifmgd->assoc_data->timeout = jiffies - 1; 8283 } 8284 ifmgd->assoc_data->timeout_started = true; 8285 } 8286 } 8287 8288 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8289 time_after(jiffies, ifmgd->auth_data->timeout)) { 8290 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8291 /* 8292 * ok ... we waited for assoc or continuation but 8293 * userspace didn't do it, so kill the auth data 8294 */ 8295 ieee80211_destroy_auth_data(sdata, false); 8296 } else if (ieee80211_auth(sdata)) { 8297 u8 ap_addr[ETH_ALEN]; 8298 struct ieee80211_event event = { 8299 .type = MLME_EVENT, 8300 .u.mlme.data = AUTH_EVENT, 8301 .u.mlme.status = MLME_TIMEOUT, 8302 }; 8303 8304 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8305 8306 ieee80211_destroy_auth_data(sdata, false); 8307 8308 cfg80211_auth_timeout(sdata->dev, ap_addr); 8309 drv_event_callback(sdata->local, sdata, &event); 8310 } 8311 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8312 run_again(sdata, ifmgd->auth_data->timeout); 8313 8314 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8315 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8316 if ((ifmgd->assoc_data->need_beacon && 8317 !sdata->deflink.u.mgd.have_beacon) || 8318 ieee80211_do_assoc(sdata)) { 8319 struct ieee80211_event event = { 8320 .type = MLME_EVENT, 8321 .u.mlme.data = ASSOC_EVENT, 8322 .u.mlme.status = MLME_TIMEOUT, 8323 }; 8324 8325 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8326 drv_event_callback(sdata->local, sdata, &event); 8327 } 8328 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8329 run_again(sdata, ifmgd->assoc_data->timeout); 8330 8331 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8332 ifmgd->associated) { 8333 u8 *bssid = sdata->deflink.u.mgd.bssid; 8334 int max_tries; 8335 8336 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8337 max_tries = max_nullfunc_tries; 8338 else 8339 max_tries = max_probe_tries; 8340 8341 /* ACK received for nullfunc probing frame */ 8342 if (!ifmgd->probe_send_count) 8343 ieee80211_reset_ap_probe(sdata); 8344 else if (ifmgd->nullfunc_failed) { 8345 if (ifmgd->probe_send_count < max_tries) { 8346 mlme_dbg(sdata, 8347 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8348 bssid, ifmgd->probe_send_count, 8349 max_tries); 8350 ieee80211_mgd_probe_ap_send(sdata); 8351 } else { 8352 mlme_dbg(sdata, 8353 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8354 bssid); 8355 ieee80211_sta_connection_lost(sdata, 8356 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8357 false); 8358 } 8359 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8360 run_again(sdata, ifmgd->probe_timeout); 8361 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8362 mlme_dbg(sdata, 8363 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8364 bssid, probe_wait_ms); 8365 ieee80211_sta_connection_lost(sdata, 8366 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8367 } else if (ifmgd->probe_send_count < max_tries) { 8368 mlme_dbg(sdata, 8369 "No probe response from AP %pM after %dms, try %d/%i\n", 8370 bssid, probe_wait_ms, 8371 ifmgd->probe_send_count, max_tries); 8372 ieee80211_mgd_probe_ap_send(sdata); 8373 } else { 8374 /* 8375 * We actually lost the connection ... or did we? 8376 * Let's make sure! 8377 */ 8378 mlme_dbg(sdata, 8379 "No probe response from AP %pM after %dms, disconnecting.\n", 8380 bssid, probe_wait_ms); 8381 8382 ieee80211_sta_connection_lost(sdata, 8383 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8384 } 8385 } 8386 } 8387 8388 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8389 { 8390 struct ieee80211_sub_if_data *sdata = 8391 from_timer(sdata, t, u.mgd.bcn_mon_timer); 8392 8393 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8394 return; 8395 8396 if (sdata->vif.bss_conf.csa_active && 8397 !sdata->deflink.u.mgd.csa.waiting_bcn) 8398 return; 8399 8400 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8401 return; 8402 8403 sdata->u.mgd.connection_loss = false; 8404 wiphy_work_queue(sdata->local->hw.wiphy, 8405 &sdata->u.mgd.beacon_connection_loss_work); 8406 } 8407 8408 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8409 { 8410 struct ieee80211_sub_if_data *sdata = 8411 from_timer(sdata, t, u.mgd.conn_mon_timer); 8412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8413 struct ieee80211_local *local = sdata->local; 8414 struct sta_info *sta; 8415 unsigned long timeout; 8416 8417 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8418 return; 8419 8420 if (sdata->vif.bss_conf.csa_active && 8421 !sdata->deflink.u.mgd.csa.waiting_bcn) 8422 return; 8423 8424 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8425 if (!sta) 8426 return; 8427 8428 timeout = sta->deflink.status_stats.last_ack; 8429 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8430 timeout = sta->deflink.rx_stats.last_rx; 8431 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8432 8433 /* If timeout is after now, then update timer to fire at 8434 * the later date, but do not actually probe at this time. 8435 */ 8436 if (time_is_after_jiffies(timeout)) { 8437 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8438 return; 8439 } 8440 8441 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8442 } 8443 8444 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8445 struct wiphy_work *work) 8446 { 8447 struct ieee80211_sub_if_data *sdata = 8448 container_of(work, struct ieee80211_sub_if_data, 8449 u.mgd.monitor_work); 8450 8451 ieee80211_mgd_probe_ap(sdata, false); 8452 } 8453 8454 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8455 { 8456 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8457 __ieee80211_stop_poll(sdata); 8458 8459 /* let's probe the connection once */ 8460 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8461 wiphy_work_queue(sdata->local->hw.wiphy, 8462 &sdata->u.mgd.monitor_work); 8463 } 8464 } 8465 8466 #ifdef CONFIG_PM 8467 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8468 { 8469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8470 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8471 8472 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8473 8474 if (ifmgd->auth_data || ifmgd->assoc_data) { 8475 const u8 *ap_addr = ifmgd->auth_data ? 8476 ifmgd->auth_data->ap_addr : 8477 ifmgd->assoc_data->ap_addr; 8478 8479 /* 8480 * If we are trying to authenticate / associate while suspending, 8481 * cfg80211 won't know and won't actually abort those attempts, 8482 * thus we need to do that ourselves. 8483 */ 8484 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8485 IEEE80211_STYPE_DEAUTH, 8486 WLAN_REASON_DEAUTH_LEAVING, 8487 false, frame_buf); 8488 if (ifmgd->assoc_data) 8489 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8490 if (ifmgd->auth_data) 8491 ieee80211_destroy_auth_data(sdata, false); 8492 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8493 IEEE80211_DEAUTH_FRAME_LEN, 8494 false); 8495 } 8496 8497 /* This is a bit of a hack - we should find a better and more generic 8498 * solution to this. Normally when suspending, cfg80211 will in fact 8499 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8500 * auth (not so important) or assoc (this is the problem) process. 8501 * 8502 * As a consequence, it can happen that we are in the process of both 8503 * associating and suspending, and receive an association response 8504 * after cfg80211 has checked if it needs to disconnect, but before 8505 * we actually set the flag to drop incoming frames. This will then 8506 * cause the workqueue flush to process the association response in 8507 * the suspend, resulting in a successful association just before it 8508 * tries to remove the interface from the driver, which now though 8509 * has a channel context assigned ... this results in issues. 8510 * 8511 * To work around this (for now) simply deauth here again if we're 8512 * now connected. 8513 */ 8514 if (ifmgd->associated && !sdata->local->wowlan) { 8515 u8 bssid[ETH_ALEN]; 8516 struct cfg80211_deauth_request req = { 8517 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8518 .bssid = bssid, 8519 }; 8520 8521 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8522 ieee80211_mgd_deauth(sdata, &req); 8523 } 8524 } 8525 #endif 8526 8527 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8528 { 8529 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8530 8531 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8532 8533 if (!ifmgd->associated) 8534 return; 8535 8536 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8537 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8538 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8539 ieee80211_sta_connection_lost(sdata, 8540 WLAN_REASON_UNSPECIFIED, 8541 true); 8542 return; 8543 } 8544 8545 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8546 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8547 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8548 ieee80211_sta_connection_lost(sdata, 8549 WLAN_REASON_UNSPECIFIED, 8550 true); 8551 return; 8552 } 8553 } 8554 8555 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8556 struct wiphy_work *work) 8557 { 8558 struct ieee80211_link_data *link = 8559 container_of(work, struct ieee80211_link_data, 8560 u.mgd.request_smps_work); 8561 8562 __ieee80211_request_smps_mgd(link->sdata, link, 8563 link->u.mgd.driver_smps_mode); 8564 } 8565 8566 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8567 struct wiphy_work *work) 8568 { 8569 struct ieee80211_sub_if_data *sdata = 8570 container_of(work, struct ieee80211_sub_if_data, 8571 u.mgd.reconf.wk.work); 8572 8573 if (!sdata->u.mgd.reconf.added_links && 8574 !sdata->u.mgd.reconf.removed_links) 8575 return; 8576 8577 sdata_info(sdata, 8578 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8579 sdata->u.mgd.reconf.added_links, 8580 sdata->u.mgd.reconf.removed_links); 8581 8582 __ieee80211_disconnect(sdata); 8583 } 8584 8585 /* interface setup */ 8586 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8587 { 8588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8589 8590 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8591 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8592 ieee80211_beacon_connection_loss_work); 8593 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8594 ieee80211_csa_connection_drop_work); 8595 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8596 ieee80211_tdls_peer_del_work); 8597 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8598 ieee80211_ml_reconf_work); 8599 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8600 ieee80211_ml_sta_reconf_timeout); 8601 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8602 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8603 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8604 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8605 ieee80211_sta_handle_tspec_ac_params_wk); 8606 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8607 ieee80211_tid_to_link_map_work); 8608 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8609 ieee80211_neg_ttlm_timeout_work); 8610 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8611 ieee80211_teardown_ttlm_work); 8612 8613 ifmgd->flags = 0; 8614 ifmgd->powersave = sdata->wdev.ps; 8615 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8616 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8617 /* Setup TDLS data */ 8618 spin_lock_init(&ifmgd->teardown_lock); 8619 ifmgd->teardown_skb = NULL; 8620 ifmgd->orig_teardown_skb = NULL; 8621 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8622 } 8623 8624 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8625 struct wiphy_work *work) 8626 { 8627 struct ieee80211_link_data *link = 8628 container_of(work, struct ieee80211_link_data, 8629 u.mgd.recalc_smps); 8630 8631 ieee80211_recalc_smps(link->sdata, link); 8632 } 8633 8634 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8635 { 8636 struct ieee80211_sub_if_data *sdata = link->sdata; 8637 struct ieee80211_local *local = sdata->local; 8638 unsigned int link_id = link->link_id; 8639 8640 link->u.mgd.p2p_noa_index = -1; 8641 link->conf->bssid = link->u.mgd.bssid; 8642 link->smps_mode = IEEE80211_SMPS_OFF; 8643 8644 wiphy_work_init(&link->u.mgd.request_smps_work, 8645 ieee80211_request_smps_mgd_work); 8646 wiphy_work_init(&link->u.mgd.recalc_smps, 8647 ieee80211_recalc_smps_work); 8648 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8649 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8650 else 8651 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8652 8653 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8654 ieee80211_csa_switch_work); 8655 8656 ieee80211_clear_tpe(&link->conf->tpe); 8657 8658 if (sdata->u.mgd.assoc_data) 8659 ether_addr_copy(link->conf->addr, 8660 sdata->u.mgd.assoc_data->link[link_id].addr); 8661 else if (sdata->u.mgd.reconf.add_links_data) 8662 ether_addr_copy(link->conf->addr, 8663 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8664 else if (!is_valid_ether_addr(link->conf->addr)) 8665 eth_random_addr(link->conf->addr); 8666 } 8667 8668 /* scan finished notification */ 8669 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8670 { 8671 struct ieee80211_sub_if_data *sdata; 8672 8673 /* Restart STA timers */ 8674 rcu_read_lock(); 8675 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8676 if (ieee80211_sdata_running(sdata)) 8677 ieee80211_restart_sta_timer(sdata); 8678 } 8679 rcu_read_unlock(); 8680 } 8681 8682 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8683 struct cfg80211_bss *cbss, s8 link_id, 8684 const u8 *ap_mld_addr, bool assoc, 8685 struct ieee80211_conn_settings *conn, 8686 bool override, 8687 unsigned long *userspace_selectors) 8688 { 8689 struct ieee80211_local *local = sdata->local; 8690 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8691 struct ieee80211_bss *bss = (void *)cbss->priv; 8692 struct sta_info *new_sta = NULL; 8693 struct ieee80211_link_data *link; 8694 bool have_sta = false; 8695 bool mlo; 8696 int err; 8697 8698 if (link_id >= 0) { 8699 mlo = true; 8700 if (WARN_ON(!ap_mld_addr)) 8701 return -EINVAL; 8702 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8703 } else { 8704 if (WARN_ON(ap_mld_addr)) 8705 return -EINVAL; 8706 ap_mld_addr = cbss->bssid; 8707 err = ieee80211_vif_set_links(sdata, 0, 0); 8708 link_id = 0; 8709 mlo = false; 8710 } 8711 8712 if (err) 8713 return err; 8714 8715 link = sdata_dereference(sdata->link[link_id], sdata); 8716 if (WARN_ON(!link)) { 8717 err = -ENOLINK; 8718 goto out_err; 8719 } 8720 8721 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8722 err = -EINVAL; 8723 goto out_err; 8724 } 8725 8726 /* If a reconfig is happening, bail out */ 8727 if (local->in_reconfig) { 8728 err = -EBUSY; 8729 goto out_err; 8730 } 8731 8732 if (assoc) { 8733 rcu_read_lock(); 8734 have_sta = sta_info_get(sdata, ap_mld_addr); 8735 rcu_read_unlock(); 8736 } 8737 8738 if (!have_sta) { 8739 if (mlo) 8740 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8741 link_id, cbss->bssid, 8742 GFP_KERNEL); 8743 else 8744 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8745 8746 if (!new_sta) { 8747 err = -ENOMEM; 8748 goto out_err; 8749 } 8750 8751 new_sta->sta.mlo = mlo; 8752 } 8753 8754 /* 8755 * Set up the information for the new channel before setting the 8756 * new channel. We can't - completely race-free - change the basic 8757 * rates bitmap and the channel (sband) that it refers to, but if 8758 * we set it up before we at least avoid calling into the driver's 8759 * bss_info_changed() method with invalid information (since we do 8760 * call that from changing the channel - only for IDLE and perhaps 8761 * some others, but ...). 8762 * 8763 * So to avoid that, just set up all the new information before the 8764 * channel, but tell the driver to apply it only afterwards, since 8765 * it might need the new channel for that. 8766 */ 8767 if (new_sta) { 8768 const struct cfg80211_bss_ies *ies; 8769 struct link_sta_info *link_sta; 8770 8771 rcu_read_lock(); 8772 link_sta = rcu_dereference(new_sta->link[link_id]); 8773 if (WARN_ON(!link_sta)) { 8774 rcu_read_unlock(); 8775 sta_info_free(local, new_sta); 8776 err = -EINVAL; 8777 goto out_err; 8778 } 8779 8780 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8781 link_sta, cbss); 8782 if (err) { 8783 rcu_read_unlock(); 8784 sta_info_free(local, new_sta); 8785 goto out_err; 8786 } 8787 8788 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8789 8790 /* set timing information */ 8791 link->conf->beacon_int = cbss->beacon_interval; 8792 ies = rcu_dereference(cbss->beacon_ies); 8793 if (ies) { 8794 link->conf->sync_tsf = ies->tsf; 8795 link->conf->sync_device_ts = 8796 bss->device_ts_beacon; 8797 8798 ieee80211_get_dtim(ies, 8799 &link->conf->sync_dtim_count, 8800 NULL); 8801 } else if (!ieee80211_hw_check(&sdata->local->hw, 8802 TIMING_BEACON_ONLY)) { 8803 ies = rcu_dereference(cbss->proberesp_ies); 8804 /* must be non-NULL since beacon IEs were NULL */ 8805 link->conf->sync_tsf = ies->tsf; 8806 link->conf->sync_device_ts = 8807 bss->device_ts_presp; 8808 link->conf->sync_dtim_count = 0; 8809 } else { 8810 link->conf->sync_tsf = 0; 8811 link->conf->sync_device_ts = 0; 8812 link->conf->sync_dtim_count = 0; 8813 } 8814 rcu_read_unlock(); 8815 } 8816 8817 if (new_sta || override) { 8818 /* 8819 * Only set this if we're also going to calculate the AP 8820 * settings etc., otherwise this was set before in a 8821 * previous call. Note override is set to %true in assoc 8822 * if the settings were changed. 8823 */ 8824 link->u.mgd.conn = *conn; 8825 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8826 mlo, &link->u.mgd.conn, 8827 userspace_selectors); 8828 if (err) { 8829 if (new_sta) 8830 sta_info_free(local, new_sta); 8831 goto out_err; 8832 } 8833 /* pass out for use in assoc */ 8834 *conn = link->u.mgd.conn; 8835 } 8836 8837 if (new_sta) { 8838 /* 8839 * tell driver about BSSID, basic rates and timing 8840 * this was set up above, before setting the channel 8841 */ 8842 ieee80211_link_info_change_notify(sdata, link, 8843 BSS_CHANGED_BSSID | 8844 BSS_CHANGED_BASIC_RATES | 8845 BSS_CHANGED_BEACON_INT); 8846 8847 if (assoc) 8848 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8849 8850 err = sta_info_insert(new_sta); 8851 new_sta = NULL; 8852 if (err) { 8853 sdata_info(sdata, 8854 "failed to insert STA entry for the AP (error %d)\n", 8855 err); 8856 goto out_release_chan; 8857 } 8858 } else 8859 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8860 8861 /* Cancel scan to ensure that nothing interferes with connection */ 8862 if (local->scanning) 8863 ieee80211_scan_cancel(local); 8864 8865 return 0; 8866 8867 out_release_chan: 8868 ieee80211_link_release_channel(link); 8869 out_err: 8870 ieee80211_vif_set_links(sdata, 0, 0); 8871 return err; 8872 } 8873 8874 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8875 const struct cfg80211_bss_ies *ies, 8876 u8 cur_channel, bool ignore_ecsa) 8877 { 8878 const struct element *csa_elem, *ecsa_elem; 8879 struct ieee80211_channel_sw_ie *csa = NULL; 8880 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8881 8882 if (!ies) 8883 return false; 8884 8885 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8886 ies->data, ies->len); 8887 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8888 csa = (void *)csa_elem->data; 8889 8890 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8891 ies->data, ies->len); 8892 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8893 ecsa = (void *)ecsa_elem->data; 8894 8895 if (csa && csa->count == 0) 8896 csa = NULL; 8897 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8898 csa = NULL; 8899 8900 if (ecsa && ecsa->count == 0) 8901 ecsa = NULL; 8902 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8903 ecsa = NULL; 8904 8905 if (ignore_ecsa && ecsa) { 8906 sdata_info(sdata, 8907 "Ignoring ECSA in probe response - was considered stuck!\n"); 8908 return csa; 8909 } 8910 8911 return csa || ecsa; 8912 } 8913 8914 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8915 struct cfg80211_bss *bss) 8916 { 8917 u8 cur_channel; 8918 bool ret; 8919 8920 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8921 8922 rcu_read_lock(); 8923 if (ieee80211_mgd_csa_present(sdata, 8924 rcu_dereference(bss->beacon_ies), 8925 cur_channel, false)) { 8926 ret = true; 8927 goto out; 8928 } 8929 8930 if (ieee80211_mgd_csa_present(sdata, 8931 rcu_dereference(bss->proberesp_ies), 8932 cur_channel, bss->proberesp_ecsa_stuck)) { 8933 ret = true; 8934 goto out; 8935 } 8936 8937 ret = false; 8938 out: 8939 rcu_read_unlock(); 8940 return ret; 8941 } 8942 8943 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 8944 const u8 *supported_selectors, 8945 u8 supported_selectors_len) 8946 { 8947 if (supported_selectors) { 8948 for (int i = 0; i < supported_selectors_len; i++) { 8949 set_bit(supported_selectors[i], 8950 userspace_selectors); 8951 } 8952 } else { 8953 /* Assume SAE_H2E support for backward compatibility. */ 8954 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 8955 userspace_selectors); 8956 } 8957 } 8958 8959 /* config hooks */ 8960 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8961 struct cfg80211_auth_request *req) 8962 { 8963 struct ieee80211_local *local = sdata->local; 8964 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8965 struct ieee80211_mgd_auth_data *auth_data; 8966 struct ieee80211_conn_settings conn; 8967 struct ieee80211_link_data *link; 8968 struct ieee80211_supported_band *sband; 8969 struct ieee80211_bss *bss; 8970 u16 auth_alg; 8971 int err; 8972 bool cont_auth, wmm_used; 8973 8974 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8975 8976 /* prepare auth data structure */ 8977 8978 switch (req->auth_type) { 8979 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8980 auth_alg = WLAN_AUTH_OPEN; 8981 break; 8982 case NL80211_AUTHTYPE_SHARED_KEY: 8983 if (fips_enabled) 8984 return -EOPNOTSUPP; 8985 auth_alg = WLAN_AUTH_SHARED_KEY; 8986 break; 8987 case NL80211_AUTHTYPE_FT: 8988 auth_alg = WLAN_AUTH_FT; 8989 break; 8990 case NL80211_AUTHTYPE_NETWORK_EAP: 8991 auth_alg = WLAN_AUTH_LEAP; 8992 break; 8993 case NL80211_AUTHTYPE_SAE: 8994 auth_alg = WLAN_AUTH_SAE; 8995 break; 8996 case NL80211_AUTHTYPE_FILS_SK: 8997 auth_alg = WLAN_AUTH_FILS_SK; 8998 break; 8999 case NL80211_AUTHTYPE_FILS_SK_PFS: 9000 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9001 break; 9002 case NL80211_AUTHTYPE_FILS_PK: 9003 auth_alg = WLAN_AUTH_FILS_PK; 9004 break; 9005 default: 9006 return -EOPNOTSUPP; 9007 } 9008 9009 if (ifmgd->assoc_data) 9010 return -EBUSY; 9011 9012 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9013 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9014 return -EINVAL; 9015 } 9016 9017 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9018 req->ie_len, GFP_KERNEL); 9019 if (!auth_data) 9020 return -ENOMEM; 9021 9022 memcpy(auth_data->ap_addr, 9023 req->ap_mld_addr ?: req->bss->bssid, 9024 ETH_ALEN); 9025 auth_data->bss = req->bss; 9026 auth_data->link_id = req->link_id; 9027 9028 if (req->auth_data_len >= 4) { 9029 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9030 __le16 *pos = (__le16 *) req->auth_data; 9031 9032 auth_data->sae_trans = le16_to_cpu(pos[0]); 9033 auth_data->sae_status = le16_to_cpu(pos[1]); 9034 } 9035 memcpy(auth_data->data, req->auth_data + 4, 9036 req->auth_data_len - 4); 9037 auth_data->data_len += req->auth_data_len - 4; 9038 } 9039 9040 /* Check if continuing authentication or trying to authenticate with the 9041 * same BSS that we were in the process of authenticating with and avoid 9042 * removal and re-addition of the STA entry in 9043 * ieee80211_prep_connection(). 9044 */ 9045 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9046 ifmgd->auth_data->link_id == req->link_id; 9047 9048 if (req->ie && req->ie_len) { 9049 memcpy(&auth_data->data[auth_data->data_len], 9050 req->ie, req->ie_len); 9051 auth_data->data_len += req->ie_len; 9052 } 9053 9054 if (req->key && req->key_len) { 9055 auth_data->key_len = req->key_len; 9056 auth_data->key_idx = req->key_idx; 9057 memcpy(auth_data->key, req->key, req->key_len); 9058 } 9059 9060 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9061 req->supported_selectors, 9062 req->supported_selectors_len); 9063 9064 auth_data->algorithm = auth_alg; 9065 9066 /* try to authenticate/probe */ 9067 9068 if (ifmgd->auth_data) { 9069 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9070 auth_data->peer_confirmed = 9071 ifmgd->auth_data->peer_confirmed; 9072 } 9073 ieee80211_destroy_auth_data(sdata, cont_auth); 9074 } 9075 9076 /* prep auth_data so we don't go into idle on disassoc */ 9077 ifmgd->auth_data = auth_data; 9078 9079 /* If this is continuation of an ongoing SAE authentication exchange 9080 * (i.e., request to send SAE Confirm) and the peer has already 9081 * confirmed, mark authentication completed since we are about to send 9082 * out SAE Confirm. 9083 */ 9084 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9085 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9086 ieee80211_mark_sta_auth(sdata); 9087 9088 if (ifmgd->associated) { 9089 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9090 9091 sdata_info(sdata, 9092 "disconnect from AP %pM for new auth to %pM\n", 9093 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9094 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9095 WLAN_REASON_UNSPECIFIED, 9096 false, frame_buf); 9097 9098 ieee80211_report_disconnect(sdata, frame_buf, 9099 sizeof(frame_buf), true, 9100 WLAN_REASON_UNSPECIFIED, 9101 false); 9102 } 9103 9104 /* needed for transmitting the auth frame(s) properly */ 9105 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9106 9107 bss = (void *)req->bss->priv; 9108 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9109 9110 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9111 9112 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9113 &conn); 9114 9115 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9116 req->ap_mld_addr, cont_auth, 9117 &conn, false, 9118 auth_data->userspace_selectors); 9119 if (err) 9120 goto err_clear; 9121 9122 if (req->link_id >= 0) 9123 link = sdata_dereference(sdata->link[req->link_id], sdata); 9124 else 9125 link = &sdata->deflink; 9126 9127 if (WARN_ON(!link)) { 9128 err = -ENOLINK; 9129 goto err_clear; 9130 } 9131 9132 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9133 auth_data->ap_addr, link->conf->addr); 9134 9135 err = ieee80211_auth(sdata); 9136 if (err) { 9137 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9138 goto err_clear; 9139 } 9140 9141 /* hold our own reference */ 9142 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9143 return 0; 9144 9145 err_clear: 9146 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9147 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9148 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9149 BSS_CHANGED_BSSID); 9150 ieee80211_link_release_channel(&sdata->deflink); 9151 } 9152 ifmgd->auth_data = NULL; 9153 kfree(auth_data); 9154 return err; 9155 } 9156 9157 static void 9158 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9159 struct ieee80211_mgd_assoc_data *assoc_data, 9160 struct cfg80211_assoc_request *req, 9161 struct ieee80211_conn_settings *conn, 9162 unsigned int link_id) 9163 { 9164 struct ieee80211_local *local = sdata->local; 9165 const struct cfg80211_bss_ies *bss_ies; 9166 struct ieee80211_supported_band *sband; 9167 struct ieee80211_link_data *link; 9168 struct cfg80211_bss *cbss; 9169 struct ieee80211_bss *bss; 9170 9171 cbss = assoc_data->link[link_id].bss; 9172 if (WARN_ON(!cbss)) 9173 return; 9174 9175 bss = (void *)cbss->priv; 9176 9177 sband = local->hw.wiphy->bands[cbss->channel->band]; 9178 if (WARN_ON(!sband)) 9179 return; 9180 9181 link = sdata_dereference(sdata->link[link_id], sdata); 9182 if (WARN_ON(!link)) 9183 return; 9184 9185 /* for MLO connections assume advertising all rates is OK */ 9186 if (!req->ap_mld_addr) { 9187 assoc_data->supp_rates = bss->supp_rates; 9188 assoc_data->supp_rates_len = bss->supp_rates_len; 9189 } 9190 9191 /* copy and link elems for the STA profile */ 9192 if (req->links[link_id].elems_len) { 9193 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9194 req->links[link_id].elems_len); 9195 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9196 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9197 assoc_data->ie_pos += req->links[link_id].elems_len; 9198 } 9199 9200 link->u.mgd.beacon_crc_valid = false; 9201 link->u.mgd.dtim_period = 0; 9202 link->u.mgd.have_beacon = false; 9203 9204 /* override HT configuration only if the AP and we support it */ 9205 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9206 struct ieee80211_sta_ht_cap sta_ht_cap; 9207 9208 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9209 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9210 } 9211 9212 rcu_read_lock(); 9213 bss_ies = rcu_dereference(cbss->beacon_ies); 9214 if (bss_ies) { 9215 u8 dtim_count = 0; 9216 9217 ieee80211_get_dtim(bss_ies, &dtim_count, 9218 &link->u.mgd.dtim_period); 9219 9220 sdata->deflink.u.mgd.have_beacon = true; 9221 9222 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9223 link->conf->sync_tsf = bss_ies->tsf; 9224 link->conf->sync_device_ts = bss->device_ts_beacon; 9225 link->conf->sync_dtim_count = dtim_count; 9226 } 9227 } else { 9228 bss_ies = rcu_dereference(cbss->ies); 9229 } 9230 9231 if (bss_ies) { 9232 const struct element *elem; 9233 9234 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9235 bss_ies->data, bss_ies->len); 9236 if (elem && elem->datalen >= 3) 9237 link->conf->profile_periodicity = elem->data[2]; 9238 else 9239 link->conf->profile_periodicity = 0; 9240 9241 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9242 bss_ies->data, bss_ies->len); 9243 if (elem && elem->datalen >= 11 && 9244 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9245 link->conf->ema_ap = true; 9246 else 9247 link->conf->ema_ap = false; 9248 } 9249 rcu_read_unlock(); 9250 9251 if (bss->corrupt_data) { 9252 char *corrupt_type = "data"; 9253 9254 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9255 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9256 corrupt_type = "beacon and probe response"; 9257 else 9258 corrupt_type = "beacon"; 9259 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9260 corrupt_type = "probe response"; 9261 } 9262 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9263 cbss->bssid, corrupt_type); 9264 } 9265 9266 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9267 if (sdata->u.mgd.powersave) 9268 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9269 else 9270 link->smps_mode = IEEE80211_SMPS_OFF; 9271 } else { 9272 link->smps_mode = link->u.mgd.req_smps; 9273 } 9274 } 9275 9276 static int 9277 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9278 struct ieee80211_mgd_assoc_data *assoc_data, 9279 int link_id) 9280 { 9281 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9282 enum nl80211_band band = cbss->channel->band; 9283 struct ieee80211_supported_band *sband; 9284 const struct element *elem; 9285 int err; 9286 9287 /* neither HT nor VHT elements used on 6 GHz */ 9288 if (band == NL80211_BAND_6GHZ) 9289 return 0; 9290 9291 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9292 return 0; 9293 9294 rcu_read_lock(); 9295 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9296 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9297 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9298 cbss->bssid); 9299 err = -EINVAL; 9300 goto out_rcu; 9301 } 9302 assoc_data->link[link_id].ap_ht_param = 9303 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9304 rcu_read_unlock(); 9305 9306 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9307 return 0; 9308 9309 /* some drivers want to support VHT on 2.4 GHz even */ 9310 sband = sdata->local->hw.wiphy->bands[band]; 9311 if (!sband->vht_cap.vht_supported) 9312 return 0; 9313 9314 rcu_read_lock(); 9315 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9316 /* but even then accept it not being present on the AP */ 9317 if (!elem && band == NL80211_BAND_2GHZ) { 9318 err = 0; 9319 goto out_rcu; 9320 } 9321 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9322 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9323 cbss->bssid); 9324 err = -EINVAL; 9325 goto out_rcu; 9326 } 9327 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9328 sizeof(struct ieee80211_vht_cap)); 9329 rcu_read_unlock(); 9330 9331 return 0; 9332 out_rcu: 9333 rcu_read_unlock(); 9334 return err; 9335 } 9336 9337 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9338 struct cfg80211_assoc_request *req) 9339 { 9340 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9341 struct ieee80211_local *local = sdata->local; 9342 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9343 struct ieee80211_mgd_assoc_data *assoc_data; 9344 const struct element *ssid_elem; 9345 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9346 struct ieee80211_link_data *link; 9347 struct cfg80211_bss *cbss; 9348 bool override, uapsd_supported; 9349 bool match_auth; 9350 int i, err; 9351 size_t size = sizeof(*assoc_data) + req->ie_len; 9352 9353 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9354 size += req->links[i].elems_len; 9355 9356 /* FIXME: no support for 4-addr MLO yet */ 9357 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9358 return -EOPNOTSUPP; 9359 9360 assoc_data = kzalloc(size, GFP_KERNEL); 9361 if (!assoc_data) 9362 return -ENOMEM; 9363 9364 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9365 9366 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9367 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9368 err = -EINVAL; 9369 goto err_free; 9370 } 9371 9372 rcu_read_lock(); 9373 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9374 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9375 rcu_read_unlock(); 9376 err = -EINVAL; 9377 goto err_free; 9378 } 9379 9380 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9381 assoc_data->ssid_len = ssid_elem->datalen; 9382 rcu_read_unlock(); 9383 9384 if (req->ap_mld_addr) 9385 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9386 else 9387 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9388 9389 assoc_data->ext_mld_capa_ops = cpu_to_le16(req->ext_mld_capa_ops); 9390 9391 if (ifmgd->associated) { 9392 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9393 9394 sdata_info(sdata, 9395 "disconnect from AP %pM for new assoc to %pM\n", 9396 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9397 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9398 WLAN_REASON_UNSPECIFIED, 9399 false, frame_buf); 9400 9401 ieee80211_report_disconnect(sdata, frame_buf, 9402 sizeof(frame_buf), true, 9403 WLAN_REASON_UNSPECIFIED, 9404 false); 9405 } 9406 9407 memset(sdata->u.mgd.userspace_selectors, 0, 9408 sizeof(sdata->u.mgd.userspace_selectors)); 9409 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9410 req->supported_selectors, 9411 req->supported_selectors_len); 9412 9413 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9414 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9415 sizeof(ifmgd->ht_capa_mask)); 9416 9417 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9418 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9419 sizeof(ifmgd->vht_capa_mask)); 9420 9421 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9422 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9423 sizeof(ifmgd->s1g_capa_mask)); 9424 9425 /* keep some setup (AP STA, channel, ...) if matching */ 9426 match_auth = ifmgd->auth_data && 9427 ether_addr_equal(ifmgd->auth_data->ap_addr, 9428 assoc_data->ap_addr) && 9429 ifmgd->auth_data->link_id == req->link_id; 9430 9431 if (req->ap_mld_addr) { 9432 uapsd_supported = true; 9433 9434 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9435 ASSOC_REQ_DISABLE_VHT | 9436 ASSOC_REQ_DISABLE_HE | 9437 ASSOC_REQ_DISABLE_EHT)) { 9438 err = -EINVAL; 9439 goto err_free; 9440 } 9441 9442 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9443 struct ieee80211_supported_band *sband; 9444 struct cfg80211_bss *link_cbss = req->links[i].bss; 9445 struct ieee80211_bss *bss; 9446 9447 if (!link_cbss) 9448 continue; 9449 9450 bss = (void *)link_cbss->priv; 9451 9452 if (!bss->wmm_used) { 9453 err = -EINVAL; 9454 req->links[i].error = err; 9455 goto err_free; 9456 } 9457 9458 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9459 err = -EINVAL; 9460 req->links[i].error = err; 9461 goto err_free; 9462 } 9463 9464 link = sdata_dereference(sdata->link[i], sdata); 9465 if (link) 9466 ether_addr_copy(assoc_data->link[i].addr, 9467 link->conf->addr); 9468 else 9469 eth_random_addr(assoc_data->link[i].addr); 9470 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9471 9472 if (match_auth && i == assoc_link_id && link) 9473 assoc_data->link[i].conn = link->u.mgd.conn; 9474 else 9475 assoc_data->link[i].conn = 9476 ieee80211_conn_settings_unlimited; 9477 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9478 req, true, i, 9479 &assoc_data->link[i].conn); 9480 assoc_data->link[i].bss = link_cbss; 9481 assoc_data->link[i].disabled = req->links[i].disabled; 9482 9483 if (!bss->uapsd_supported) 9484 uapsd_supported = false; 9485 9486 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9487 err = -EINVAL; 9488 req->links[i].error = err; 9489 goto err_free; 9490 } 9491 9492 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9493 assoc_data, i); 9494 if (err) { 9495 err = -EINVAL; 9496 req->links[i].error = err; 9497 goto err_free; 9498 } 9499 } 9500 9501 assoc_data->wmm = true; 9502 } else { 9503 struct ieee80211_supported_band *sband; 9504 struct ieee80211_bss *bss = (void *)cbss->priv; 9505 9506 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9507 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9508 9509 assoc_data->wmm = bss->wmm_used && 9510 (local->hw.queues >= IEEE80211_NUM_ACS); 9511 9512 if (cbss->channel->band == NL80211_BAND_6GHZ && 9513 req->flags & (ASSOC_REQ_DISABLE_HT | 9514 ASSOC_REQ_DISABLE_VHT | 9515 ASSOC_REQ_DISABLE_HE)) { 9516 err = -EINVAL; 9517 goto err_free; 9518 } 9519 9520 sband = local->hw.wiphy->bands[cbss->channel->band]; 9521 9522 assoc_data->link[0].bss = cbss; 9523 9524 if (match_auth) 9525 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9526 else 9527 assoc_data->link[0].conn = 9528 ieee80211_conn_settings_unlimited; 9529 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9530 assoc_data->wmm, 0, 9531 &assoc_data->link[0].conn); 9532 9533 uapsd_supported = bss->uapsd_supported; 9534 9535 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9536 if (err) 9537 goto err_free; 9538 } 9539 9540 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9541 9542 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9543 err = -EBUSY; 9544 goto err_free; 9545 } 9546 9547 if (ifmgd->assoc_data) { 9548 err = -EBUSY; 9549 goto err_free; 9550 } 9551 9552 /* Cleanup is delayed if auth_data matches */ 9553 if (ifmgd->auth_data && !match_auth) 9554 ieee80211_destroy_auth_data(sdata, false); 9555 9556 if (req->ie && req->ie_len) { 9557 memcpy(assoc_data->ie, req->ie, req->ie_len); 9558 assoc_data->ie_len = req->ie_len; 9559 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9560 } else { 9561 assoc_data->ie_pos = assoc_data->ie; 9562 } 9563 9564 if (req->fils_kek) { 9565 /* should already be checked in cfg80211 - so warn */ 9566 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9567 err = -EINVAL; 9568 goto err_free; 9569 } 9570 memcpy(assoc_data->fils_kek, req->fils_kek, 9571 req->fils_kek_len); 9572 assoc_data->fils_kek_len = req->fils_kek_len; 9573 } 9574 9575 if (req->fils_nonces) 9576 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9577 2 * FILS_NONCE_LEN); 9578 9579 /* default timeout */ 9580 assoc_data->timeout = jiffies; 9581 assoc_data->timeout_started = true; 9582 9583 assoc_data->assoc_link_id = assoc_link_id; 9584 9585 if (req->ap_mld_addr) { 9586 /* if there was no authentication, set up the link */ 9587 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9588 if (err) 9589 goto err_clear; 9590 } 9591 9592 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9593 if (WARN_ON(!link)) { 9594 err = -EINVAL; 9595 goto err_clear; 9596 } 9597 9598 override = link->u.mgd.conn.mode != 9599 assoc_data->link[assoc_link_id].conn.mode || 9600 link->u.mgd.conn.bw_limit != 9601 assoc_data->link[assoc_link_id].conn.bw_limit; 9602 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9603 9604 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9605 assoc_link_id); 9606 9607 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9608 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9609 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9610 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9611 9612 if (assoc_data->wmm && uapsd_supported && 9613 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9614 assoc_data->uapsd = true; 9615 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9616 } else { 9617 assoc_data->uapsd = false; 9618 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9619 } 9620 9621 if (req->prev_bssid) 9622 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9623 9624 if (req->use_mfp) { 9625 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9626 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9627 } else { 9628 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9629 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9630 } 9631 9632 if (req->flags & ASSOC_REQ_USE_RRM) 9633 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9634 else 9635 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9636 9637 if (req->crypto.control_port) 9638 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9639 else 9640 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9641 9642 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9643 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9644 sdata->control_port_over_nl80211 = 9645 req->crypto.control_port_over_nl80211; 9646 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9647 9648 /* kick off associate process */ 9649 ifmgd->assoc_data = assoc_data; 9650 9651 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9652 if (!assoc_data->link[i].bss) 9653 continue; 9654 if (i == assoc_data->assoc_link_id) 9655 continue; 9656 /* only calculate the mode, hence link == NULL */ 9657 err = ieee80211_prep_channel(sdata, NULL, i, 9658 assoc_data->link[i].bss, true, 9659 &assoc_data->link[i].conn, 9660 sdata->u.mgd.userspace_selectors); 9661 if (err) { 9662 req->links[i].error = err; 9663 goto err_clear; 9664 } 9665 } 9666 9667 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9668 vif_cfg->ssid_len = assoc_data->ssid_len; 9669 9670 /* needed for transmitting the assoc frames properly */ 9671 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9672 9673 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9674 req->ap_mld_addr, true, 9675 &assoc_data->link[assoc_link_id].conn, 9676 override, 9677 sdata->u.mgd.userspace_selectors); 9678 if (err) 9679 goto err_clear; 9680 9681 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9682 const struct cfg80211_bss_ies *beacon_ies; 9683 9684 rcu_read_lock(); 9685 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9686 if (!beacon_ies) { 9687 /* 9688 * Wait up to one beacon interval ... 9689 * should this be more if we miss one? 9690 */ 9691 sdata_info(sdata, "waiting for beacon from %pM\n", 9692 link->u.mgd.bssid); 9693 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9694 assoc_data->timeout_started = true; 9695 assoc_data->need_beacon = true; 9696 } 9697 rcu_read_unlock(); 9698 } 9699 9700 run_again(sdata, assoc_data->timeout); 9701 9702 /* We are associating, clean up auth_data */ 9703 if (ifmgd->auth_data) 9704 ieee80211_destroy_auth_data(sdata, true); 9705 9706 return 0; 9707 err_clear: 9708 if (!ifmgd->auth_data) { 9709 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9710 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9711 BSS_CHANGED_BSSID); 9712 } 9713 ifmgd->assoc_data = NULL; 9714 err_free: 9715 kfree(assoc_data); 9716 return err; 9717 } 9718 9719 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9720 struct cfg80211_deauth_request *req) 9721 { 9722 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9723 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9724 bool tx = !req->local_state_change; 9725 struct ieee80211_prep_tx_info info = { 9726 .subtype = IEEE80211_STYPE_DEAUTH, 9727 }; 9728 9729 if (ifmgd->auth_data && 9730 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9731 sdata_info(sdata, 9732 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9733 req->bssid, req->reason_code, 9734 ieee80211_get_reason_code_string(req->reason_code)); 9735 9736 info.link_id = ifmgd->auth_data->link_id; 9737 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9738 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9739 IEEE80211_STYPE_DEAUTH, 9740 req->reason_code, tx, 9741 frame_buf); 9742 ieee80211_destroy_auth_data(sdata, false); 9743 ieee80211_report_disconnect(sdata, frame_buf, 9744 sizeof(frame_buf), true, 9745 req->reason_code, false); 9746 drv_mgd_complete_tx(sdata->local, sdata, &info); 9747 return 0; 9748 } 9749 9750 if (ifmgd->assoc_data && 9751 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9752 sdata_info(sdata, 9753 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9754 req->bssid, req->reason_code, 9755 ieee80211_get_reason_code_string(req->reason_code)); 9756 9757 info.link_id = ifmgd->assoc_data->assoc_link_id; 9758 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9759 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9760 IEEE80211_STYPE_DEAUTH, 9761 req->reason_code, tx, 9762 frame_buf); 9763 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9764 ieee80211_report_disconnect(sdata, frame_buf, 9765 sizeof(frame_buf), true, 9766 req->reason_code, false); 9767 drv_mgd_complete_tx(sdata->local, sdata, &info); 9768 return 0; 9769 } 9770 9771 if (ifmgd->associated && 9772 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9773 sdata_info(sdata, 9774 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9775 req->bssid, req->reason_code, 9776 ieee80211_get_reason_code_string(req->reason_code)); 9777 9778 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9779 req->reason_code, tx, frame_buf); 9780 ieee80211_report_disconnect(sdata, frame_buf, 9781 sizeof(frame_buf), true, 9782 req->reason_code, false); 9783 return 0; 9784 } 9785 9786 return -ENOTCONN; 9787 } 9788 9789 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9790 struct cfg80211_disassoc_request *req) 9791 { 9792 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9793 9794 if (!sdata->u.mgd.associated || 9795 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9796 return -ENOTCONN; 9797 9798 sdata_info(sdata, 9799 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9800 req->ap_addr, req->reason_code, 9801 ieee80211_get_reason_code_string(req->reason_code)); 9802 9803 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9804 req->reason_code, !req->local_state_change, 9805 frame_buf); 9806 9807 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9808 req->reason_code, false); 9809 9810 return 0; 9811 } 9812 9813 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9814 { 9815 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9816 &link->u.mgd.request_smps_work); 9817 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9818 &link->u.mgd.recalc_smps); 9819 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9820 &link->u.mgd.csa.switch_work); 9821 } 9822 9823 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9824 { 9825 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9826 9827 /* 9828 * Make sure some work items will not run after this, 9829 * they will not do anything but might not have been 9830 * cancelled when disconnecting. 9831 */ 9832 wiphy_work_cancel(sdata->local->hw.wiphy, 9833 &ifmgd->monitor_work); 9834 wiphy_work_cancel(sdata->local->hw.wiphy, 9835 &ifmgd->beacon_connection_loss_work); 9836 wiphy_work_cancel(sdata->local->hw.wiphy, 9837 &ifmgd->csa_connection_drop_work); 9838 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9839 &ifmgd->tdls_peer_del_work); 9840 9841 if (ifmgd->assoc_data) 9842 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9843 if (ifmgd->auth_data) 9844 ieee80211_destroy_auth_data(sdata, false); 9845 spin_lock_bh(&ifmgd->teardown_lock); 9846 if (ifmgd->teardown_skb) { 9847 kfree_skb(ifmgd->teardown_skb); 9848 ifmgd->teardown_skb = NULL; 9849 ifmgd->orig_teardown_skb = NULL; 9850 } 9851 kfree(ifmgd->assoc_req_ies); 9852 ifmgd->assoc_req_ies = NULL; 9853 ifmgd->assoc_req_ies_len = 0; 9854 spin_unlock_bh(&ifmgd->teardown_lock); 9855 timer_delete_sync(&ifmgd->timer); 9856 } 9857 9858 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9859 enum nl80211_cqm_rssi_threshold_event rssi_event, 9860 s32 rssi_level, 9861 gfp_t gfp) 9862 { 9863 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9864 9865 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9866 9867 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9868 } 9869 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9870 9871 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9872 { 9873 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9874 9875 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9876 9877 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9878 } 9879 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9880 9881 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9882 int rssi_min_thold, 9883 int rssi_max_thold) 9884 { 9885 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9886 9887 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9888 return; 9889 9890 /* 9891 * Scale up threshold values before storing it, as the RSSI averaging 9892 * algorithm uses a scaled up value as well. Change this scaling 9893 * factor if the RSSI averaging algorithm changes. 9894 */ 9895 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9896 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9897 } 9898 9899 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9900 int rssi_min_thold, 9901 int rssi_max_thold) 9902 { 9903 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9904 9905 WARN_ON(rssi_min_thold == rssi_max_thold || 9906 rssi_min_thold > rssi_max_thold); 9907 9908 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9909 rssi_max_thold); 9910 } 9911 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9912 9913 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9914 { 9915 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9916 9917 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9918 } 9919 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9920 9921 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 9922 struct ieee80211_mgmt *mgmt, size_t len) 9923 { 9924 struct ieee80211_local *local = sdata->local; 9925 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9926 struct ieee80211_mgd_assoc_data *add_links_data = 9927 ifmgd->reconf.add_links_data; 9928 struct sta_info *sta; 9929 struct cfg80211_mlo_reconf_done_data done_data = {}; 9930 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 9931 sdata->u.mgd.reconf.removed_links; 9932 u16 link_mask, valid_links; 9933 unsigned int link_id; 9934 size_t orig_len = len; 9935 u8 i, group_key_data_len; 9936 u8 *pos; 9937 9938 if (!ieee80211_vif_is_mld(&sdata->vif) || 9939 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 9940 mgmt->u.action.u.ml_reconf_resp.dialog_token != 9941 sdata->u.mgd.reconf.dialog_token || 9942 !sta_changed_links) 9943 return; 9944 9945 pos = mgmt->u.action.u.ml_reconf_resp.variable; 9946 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 9947 9948 /* each status duple is 3 octets */ 9949 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 9950 sdata_info(sdata, 9951 "mlo: reconf: unexpected len=%zu, count=%u\n", 9952 len, mgmt->u.action.u.ml_reconf_resp.count); 9953 goto disconnect; 9954 } 9955 9956 link_mask = sta_changed_links; 9957 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 9958 u16 status = get_unaligned_le16(pos + 1); 9959 9960 link_id = *pos; 9961 9962 if (!(link_mask & BIT(link_id))) { 9963 sdata_info(sdata, 9964 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 9965 link_id, sta_changed_links); 9966 goto disconnect; 9967 } 9968 9969 /* clear the corresponding link, to detect the case that 9970 * the same link was included more than one time 9971 */ 9972 link_mask &= ~BIT(link_id); 9973 9974 /* Handle failure to remove links here. Failure to remove added 9975 * links will be done later in the flow. 9976 */ 9977 if (status != WLAN_STATUS_SUCCESS) { 9978 sdata_info(sdata, 9979 "mlo: reconf: failed on link=%u, status=%u\n", 9980 link_id, status); 9981 9982 /* The AP MLD failed to remove a link that was already 9983 * removed locally. As this is not expected behavior, 9984 * disconnect 9985 */ 9986 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 9987 goto disconnect; 9988 9989 /* The AP MLD failed to add a link. Remove it from the 9990 * added links. 9991 */ 9992 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 9993 } 9994 9995 pos += 3; 9996 len -= 3; 9997 } 9998 9999 if (link_mask) { 10000 sdata_info(sdata, 10001 "mlo: reconf: no response for links=0x%x\n", 10002 link_mask); 10003 goto disconnect; 10004 } 10005 10006 if (!sdata->u.mgd.reconf.added_links) 10007 goto out; 10008 10009 if (len < 1 || len < 1 + *pos) { 10010 sdata_info(sdata, 10011 "mlo: reconf: invalid group key data length"); 10012 goto disconnect; 10013 } 10014 10015 /* The Group Key Data field must be present when links are added. This 10016 * field should be processed by userland. 10017 */ 10018 group_key_data_len = *pos++; 10019 10020 pos += group_key_data_len; 10021 len -= group_key_data_len + 1; 10022 10023 /* Process the information for the added links */ 10024 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10025 if (WARN_ON(!sta)) 10026 goto disconnect; 10027 10028 valid_links = sdata->vif.valid_links; 10029 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10030 if (!add_links_data->link[link_id].bss || 10031 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10032 10033 continue; 10034 10035 valid_links |= BIT(link_id); 10036 if (ieee80211_sta_allocate_link(sta, link_id)) 10037 goto disconnect; 10038 } 10039 10040 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10041 link_mask = 0; 10042 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10043 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10044 struct ieee80211_link_data *link; 10045 struct link_sta_info *link_sta; 10046 u64 changed = 0; 10047 10048 if (!cbss) 10049 continue; 10050 10051 link = sdata_dereference(sdata->link[link_id], sdata); 10052 if (WARN_ON(!link)) 10053 goto disconnect; 10054 10055 link_info(link, 10056 "mlo: reconf: local address %pM, AP link address %pM\n", 10057 add_links_data->link[link_id].addr, 10058 add_links_data->link[link_id].bss->bssid); 10059 10060 link_sta = rcu_dereference_protected(sta->link[link_id], 10061 lockdep_is_held(&local->hw.wiphy->mtx)); 10062 if (WARN_ON(!link_sta)) 10063 goto disconnect; 10064 10065 if (!link->u.mgd.have_beacon) { 10066 const struct cfg80211_bss_ies *ies; 10067 10068 rcu_read_lock(); 10069 ies = rcu_dereference(cbss->beacon_ies); 10070 if (ies) 10071 link->u.mgd.have_beacon = true; 10072 else 10073 ies = rcu_dereference(cbss->ies); 10074 ieee80211_get_dtim(ies, 10075 &link->conf->sync_dtim_count, 10076 &link->u.mgd.dtim_period); 10077 link->conf->beacon_int = cbss->beacon_interval; 10078 rcu_read_unlock(); 10079 } 10080 10081 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10082 10083 link->u.mgd.conn = add_links_data->link[link_id].conn; 10084 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10085 true, &link->u.mgd.conn, 10086 sdata->u.mgd.userspace_selectors)) { 10087 link_info(link, "mlo: reconf: prep_channel failed\n"); 10088 goto disconnect; 10089 } 10090 10091 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10092 add_links_data->link[link_id].bss)) 10093 goto disconnect; 10094 10095 if (!ieee80211_assoc_config_link(link, link_sta, 10096 add_links_data->link[link_id].bss, 10097 mgmt, pos, len, 10098 &changed)) 10099 goto disconnect; 10100 10101 /* The AP MLD indicated success for this link, but the station 10102 * profile status indicated otherwise. Since there is an 10103 * inconsistency in the ML reconfiguration response, disconnect 10104 */ 10105 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10106 goto disconnect; 10107 10108 ieee80211_sta_init_nss(link_sta); 10109 if (ieee80211_sta_activate_link(sta, link_id)) 10110 goto disconnect; 10111 10112 changed |= ieee80211_link_set_associated(link, cbss); 10113 ieee80211_link_info_change_notify(sdata, link, changed); 10114 10115 ieee80211_recalc_smps(sdata, link); 10116 link_mask |= BIT(link_id); 10117 } 10118 10119 sdata_info(sdata, 10120 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10121 valid_links, link_mask); 10122 10123 /* links might have changed due to rejected ones, set them again */ 10124 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10125 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10126 10127 ieee80211_recalc_ps(local); 10128 ieee80211_recalc_ps_vif(sdata); 10129 10130 done_data.buf = (const u8 *)mgmt; 10131 done_data.len = orig_len; 10132 done_data.added_links = link_mask; 10133 10134 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10135 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10136 done_data.links[link_id].addr = 10137 add_links_data->link[link_id].addr; 10138 } 10139 10140 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10141 kfree(sdata->u.mgd.reconf.add_links_data); 10142 sdata->u.mgd.reconf.add_links_data = NULL; 10143 out: 10144 ieee80211_ml_reconf_reset(sdata); 10145 return; 10146 10147 disconnect: 10148 __ieee80211_disconnect(sdata); 10149 } 10150 10151 static struct sk_buff * 10152 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10153 struct ieee80211_mgd_assoc_data *add_links_data, 10154 u16 removed_links, __le16 ext_mld_capa_ops) 10155 { 10156 struct ieee80211_local *local = sdata->local; 10157 struct ieee80211_mgmt *mgmt; 10158 struct ieee80211_multi_link_elem *ml_elem; 10159 struct ieee80211_mle_basic_common_info *common; 10160 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10161 struct sk_buff *skb; 10162 size_t size; 10163 unsigned int link_id; 10164 __le16 eml_capa = 0, mld_capa_ops = 0; 10165 struct ieee80211_tx_info *info; 10166 u8 common_size, var_common_size; 10167 u8 *ml_elem_len; 10168 u16 capab = 0; 10169 10170 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10171 10172 /* Consider the maximal length of the reconfiguration ML element */ 10173 size += sizeof(struct ieee80211_multi_link_elem); 10174 10175 /* The Basic ML element and the Reconfiguration ML element have the same 10176 * fixed common information fields in the context of ML reconfiguration 10177 * action frame. The AP MLD MAC address must always be present 10178 */ 10179 common_size = sizeof(*common); 10180 10181 /* when adding links, the MLD capabilities must be present */ 10182 var_common_size = 0; 10183 if (add_links_data) { 10184 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10185 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10186 ieee80211_vif_type_p2p(&sdata->vif)); 10187 10188 if (ift_ext_capa) { 10189 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10190 mld_capa_ops = 10191 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10192 } 10193 10194 /* MLD capabilities and operation */ 10195 var_common_size += 2; 10196 10197 /* EML capabilities */ 10198 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10199 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10200 var_common_size += 2; 10201 } 10202 10203 if (ext_mld_capa_ops) 10204 var_common_size += 2; 10205 10206 /* Add the common information length */ 10207 size += common_size + var_common_size; 10208 10209 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10210 struct cfg80211_bss *cbss; 10211 size_t elems_len; 10212 10213 if (removed_links & BIT(link_id)) { 10214 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10215 ETH_ALEN; 10216 continue; 10217 } 10218 10219 if (!add_links_data || !add_links_data->link[link_id].bss) 10220 continue; 10221 10222 elems_len = add_links_data->link[link_id].elems_len; 10223 cbss = add_links_data->link[link_id].bss; 10224 10225 /* should be the same across all BSSes */ 10226 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10227 capab |= WLAN_CAPABILITY_PRIVACY; 10228 10229 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10230 ETH_ALEN; 10231 10232 /* WMM */ 10233 size += 9; 10234 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10235 elems_len); 10236 } 10237 10238 skb = alloc_skb(size, GFP_KERNEL); 10239 if (!skb) 10240 return NULL; 10241 10242 skb_reserve(skb, local->hw.extra_tx_headroom); 10243 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10244 u.action.u.ml_reconf_req)); 10245 10246 /* Add the MAC header */ 10247 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10248 IEEE80211_STYPE_ACTION); 10249 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10250 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10251 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10252 10253 /* Add the action frame fixed fields */ 10254 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10255 mgmt->u.action.u.ml_reconf_req.action_code = 10256 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10257 10258 /* allocate a dialog token and store it */ 10259 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10260 mgmt->u.action.u.ml_reconf_req.dialog_token = 10261 sdata->u.mgd.reconf.dialog_token; 10262 10263 /* Add the ML reconfiguration element and the common information */ 10264 skb_put_u8(skb, WLAN_EID_EXTENSION); 10265 ml_elem_len = skb_put(skb, 1); 10266 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10267 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10268 ml_elem->control = 10269 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10270 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10271 common = skb_put(skb, common_size); 10272 common->len = common_size + var_common_size; 10273 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10274 10275 if (add_links_data) { 10276 if (eml_capa & 10277 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10278 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10279 ml_elem->control |= 10280 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10281 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10282 } 10283 10284 ml_elem->control |= 10285 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10286 10287 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10288 } 10289 10290 if (ext_mld_capa_ops) { 10291 ml_elem->control |= 10292 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10293 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10294 } 10295 10296 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10297 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10298 10299 /* Add the per station profile */ 10300 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10301 u8 *subelem_len = NULL; 10302 u16 ctrl; 10303 const u8 *addr; 10304 10305 /* Skip links that are not changing */ 10306 if (!(removed_links & BIT(link_id)) && 10307 (!add_links_data || !add_links_data->link[link_id].bss)) 10308 continue; 10309 10310 ctrl = link_id | 10311 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10312 10313 if (removed_links & BIT(link_id)) { 10314 struct ieee80211_bss_conf *conf = 10315 sdata_dereference(sdata->vif.link_conf[link_id], 10316 sdata); 10317 if (!conf) 10318 continue; 10319 10320 addr = conf->addr; 10321 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10322 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10323 } else { 10324 addr = add_links_data->link[link_id].addr; 10325 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10326 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10327 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10328 } 10329 10330 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10331 subelem_len = skb_put(skb, 1); 10332 10333 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10334 skb_put_u8(skb, 1 + ETH_ALEN); 10335 skb_put_data(skb, addr, ETH_ALEN); 10336 10337 if (!(removed_links & BIT(link_id))) { 10338 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10339 size_t extra_used; 10340 void *capab_pos; 10341 u8 qos_info; 10342 10343 capab_pos = skb_put(skb, 2); 10344 10345 extra_used = 10346 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10347 add_links_data->link[link_id].elems, 10348 add_links_data->link[link_id].elems_len, 10349 link_id, NULL, 10350 link_present_elems, 10351 add_links_data); 10352 10353 if (add_links_data->link[link_id].elems) 10354 skb_put_data(skb, 10355 add_links_data->link[link_id].elems + 10356 extra_used, 10357 add_links_data->link[link_id].elems_len - 10358 extra_used); 10359 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10360 qos_info = sdata->u.mgd.uapsd_queues; 10361 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10362 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10363 } else { 10364 qos_info = 0; 10365 } 10366 10367 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10368 put_unaligned_le16(capab, capab_pos); 10369 } 10370 10371 ieee80211_fragment_element(skb, subelem_len, 10372 IEEE80211_MLE_SUBELEM_FRAGMENT); 10373 } 10374 10375 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10376 10377 info = IEEE80211_SKB_CB(skb); 10378 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10379 10380 return skb; 10381 } 10382 10383 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10384 struct cfg80211_ml_reconf_req *req) 10385 { 10386 struct ieee80211_local *local = sdata->local; 10387 struct ieee80211_mgd_assoc_data *data = NULL; 10388 struct sta_info *sta; 10389 struct sk_buff *skb; 10390 u16 added_links, new_valid_links; 10391 int link_id, err; 10392 10393 if (!ieee80211_vif_is_mld(&sdata->vif) || 10394 !(sdata->vif.cfg.mld_capa_op & 10395 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10396 return -EINVAL; 10397 10398 /* No support for concurrent ML reconfiguration operation */ 10399 if (sdata->u.mgd.reconf.added_links || 10400 sdata->u.mgd.reconf.removed_links) 10401 return -EBUSY; 10402 10403 added_links = 0; 10404 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10405 if (!req->add_links[link_id].bss) 10406 continue; 10407 10408 added_links |= BIT(link_id); 10409 } 10410 10411 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10412 if (WARN_ON(!sta)) 10413 return -ENOLINK; 10414 10415 /* Adding links to the set of valid link is done only after a successful 10416 * ML reconfiguration frame exchange. Here prepare the data for the ML 10417 * reconfiguration frame construction and allocate the required 10418 * resources 10419 */ 10420 if (added_links) { 10421 bool uapsd_supported; 10422 10423 data = kzalloc(sizeof(*data), GFP_KERNEL); 10424 if (!data) 10425 return -ENOMEM; 10426 10427 data->assoc_link_id = -1; 10428 data->wmm = true; 10429 10430 uapsd_supported = true; 10431 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10432 link_id++) { 10433 struct ieee80211_supported_band *sband; 10434 struct cfg80211_bss *link_cbss = 10435 req->add_links[link_id].bss; 10436 struct ieee80211_bss *bss; 10437 10438 if (!link_cbss) 10439 continue; 10440 10441 bss = (void *)link_cbss->priv; 10442 10443 if (!bss->wmm_used) { 10444 err = -EINVAL; 10445 goto err_free; 10446 } 10447 10448 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10449 err = -EINVAL; 10450 goto err_free; 10451 } 10452 10453 eth_random_addr(data->link[link_id].addr); 10454 data->link[link_id].conn = 10455 ieee80211_conn_settings_unlimited; 10456 sband = 10457 local->hw.wiphy->bands[link_cbss->channel->band]; 10458 10459 ieee80211_determine_our_sta_mode(sdata, sband, 10460 NULL, true, link_id, 10461 &data->link[link_id].conn); 10462 10463 data->link[link_id].bss = link_cbss; 10464 data->link[link_id].disabled = 10465 req->add_links[link_id].disabled; 10466 data->link[link_id].elems = 10467 (u8 *)req->add_links[link_id].elems; 10468 data->link[link_id].elems_len = 10469 req->add_links[link_id].elems_len; 10470 10471 if (!bss->uapsd_supported) 10472 uapsd_supported = false; 10473 10474 if (data->link[link_id].conn.mode < 10475 IEEE80211_CONN_MODE_EHT) { 10476 err = -EINVAL; 10477 goto err_free; 10478 } 10479 10480 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10481 link_id); 10482 if (err) { 10483 err = -EINVAL; 10484 goto err_free; 10485 } 10486 } 10487 10488 /* Require U-APSD support if we enabled it */ 10489 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10490 !uapsd_supported) { 10491 err = -EINVAL; 10492 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10493 goto err_free; 10494 } 10495 10496 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10497 link_id++) { 10498 if (!data->link[link_id].bss) 10499 continue; 10500 10501 /* only used to verify the mode, nothing is allocated */ 10502 err = ieee80211_prep_channel(sdata, NULL, link_id, 10503 data->link[link_id].bss, 10504 true, 10505 &data->link[link_id].conn, 10506 sdata->u.mgd.userspace_selectors); 10507 if (err) 10508 goto err_free; 10509 } 10510 } 10511 10512 /* link removal is done before the ML reconfiguration frame exchange so 10513 * that these links will not be used between their removal by the AP MLD 10514 * and before the station got the ML reconfiguration response. Based on 10515 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10516 * link removal request. 10517 */ 10518 if (req->rem_links) { 10519 u16 new_active_links = 10520 sdata->vif.active_links & ~req->rem_links; 10521 10522 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10523 10524 /* Should not be left with no valid links to perform the 10525 * ML reconfiguration 10526 */ 10527 if (!new_valid_links || 10528 !(new_valid_links & ~sdata->vif.dormant_links)) { 10529 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10530 err = -EINVAL; 10531 goto err_free; 10532 } 10533 10534 if (new_active_links != sdata->vif.active_links) { 10535 if (!new_active_links) 10536 new_active_links = 10537 BIT(__ffs(new_valid_links & 10538 ~sdata->vif.dormant_links)); 10539 10540 err = ieee80211_set_active_links(&sdata->vif, 10541 new_active_links); 10542 if (err) { 10543 sdata_info(sdata, 10544 "mlo: reconf: failed set active links\n"); 10545 goto err_free; 10546 } 10547 } 10548 } 10549 10550 /* Build the SKB before the link removal as the construction of the 10551 * station info for removed links requires the local address. 10552 * Invalidate the removed links, so that the transmission of the ML 10553 * reconfiguration request frame would not be done using them, as the AP 10554 * is expected to send the ML reconfiguration response frame on the link 10555 * on which the request was received. 10556 */ 10557 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10558 cpu_to_le16(req->ext_mld_capa_ops)); 10559 if (!skb) { 10560 err = -ENOMEM; 10561 goto err_free; 10562 } 10563 10564 if (req->rem_links) { 10565 u16 new_dormant_links = 10566 sdata->vif.dormant_links & ~req->rem_links; 10567 10568 err = ieee80211_vif_set_links(sdata, new_valid_links, 10569 new_dormant_links); 10570 if (err) { 10571 sdata_info(sdata, 10572 "mlo: reconf: failed set valid links\n"); 10573 kfree_skb(skb); 10574 goto err_free; 10575 } 10576 10577 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10578 link_id++) { 10579 if (!(req->rem_links & BIT(link_id))) 10580 continue; 10581 10582 ieee80211_sta_remove_link(sta, link_id); 10583 } 10584 10585 /* notify the driver and upper layers */ 10586 ieee80211_vif_cfg_change_notify(sdata, 10587 BSS_CHANGED_MLD_VALID_LINKS); 10588 cfg80211_links_removed(sdata->dev, req->rem_links); 10589 } 10590 10591 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10592 added_links, req->rem_links); 10593 10594 ieee80211_tx_skb(sdata, skb); 10595 10596 sdata->u.mgd.reconf.added_links = added_links; 10597 sdata->u.mgd.reconf.add_links_data = data; 10598 sdata->u.mgd.reconf.removed_links = req->rem_links; 10599 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10600 &sdata->u.mgd.reconf.wk, 10601 IEEE80211_ASSOC_TIMEOUT_SHORT); 10602 return 0; 10603 10604 err_free: 10605 kfree(data); 10606 return err; 10607 } 10608 10609 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10610 { 10611 unsigned long valid_links = sdata->vif.valid_links; 10612 u8 link_id; 10613 10614 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10615 10616 if (!ieee80211_vif_is_mld(&sdata->vif)) 10617 return false; 10618 10619 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10620 struct ieee80211_bss_conf *bss_conf = 10621 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10622 10623 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10624 return false; 10625 } 10626 10627 return true; 10628 } 10629 10630 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10631 { 10632 struct ieee80211_local *local = sdata->local; 10633 struct ieee80211_mgmt *mgmt; 10634 struct sk_buff *skb; 10635 int frame_len = offsetofend(struct ieee80211_mgmt, 10636 u.action.u.epcs) + (enable ? 1 : 0); 10637 10638 if (!ieee80211_mgd_epcs_supp(sdata)) 10639 return -EINVAL; 10640 10641 if (sdata->u.mgd.epcs.enabled == enable && 10642 !sdata->u.mgd.epcs.dialog_token) 10643 return 0; 10644 10645 /* Do not allow enabling EPCS if the AP didn't respond yet. 10646 * However, allow disabling EPCS in such a case. 10647 */ 10648 if (sdata->u.mgd.epcs.dialog_token && enable) 10649 return -EALREADY; 10650 10651 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10652 if (!skb) 10653 return -ENOBUFS; 10654 10655 skb_reserve(skb, local->hw.extra_tx_headroom); 10656 mgmt = skb_put_zero(skb, frame_len); 10657 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10658 IEEE80211_STYPE_ACTION); 10659 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10660 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10661 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10662 10663 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10664 if (enable) { 10665 u8 *pos = mgmt->u.action.u.epcs.variable; 10666 10667 mgmt->u.action.u.epcs.action_code = 10668 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10669 10670 *pos = ++sdata->u.mgd.dialog_token_alloc; 10671 sdata->u.mgd.epcs.dialog_token = *pos; 10672 } else { 10673 mgmt->u.action.u.epcs.action_code = 10674 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10675 10676 ieee80211_epcs_teardown(sdata); 10677 ieee80211_epcs_changed(sdata, false); 10678 } 10679 10680 ieee80211_tx_skb(sdata, skb); 10681 return 0; 10682 } 10683 10684 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10685 struct ieee802_11_elems *elems) 10686 { 10687 const struct element *sub; 10688 size_t scratch_len = elems->ml_epcs_len; 10689 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10690 10691 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10692 10693 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10694 return; 10695 10696 if (WARN_ON(!scratch)) 10697 return; 10698 10699 /* Directly parse the sub elements as the common information doesn't 10700 * hold any useful information. 10701 */ 10702 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10703 elems->ml_epcs_len) { 10704 struct ieee80211_link_data *link; 10705 struct ieee802_11_elems *link_elems __free(kfree); 10706 u8 *pos = (void *)sub->data; 10707 u16 control; 10708 ssize_t len; 10709 u8 link_id; 10710 10711 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10712 continue; 10713 10714 if (sub->datalen < sizeof(control)) 10715 break; 10716 10717 control = get_unaligned_le16(pos); 10718 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10719 10720 link = sdata_dereference(sdata->link[link_id], sdata); 10721 if (!link) 10722 continue; 10723 10724 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10725 elems->ml_epcs_len, 10726 scratch, scratch_len, 10727 IEEE80211_MLE_SUBELEM_FRAGMENT); 10728 if (len < (ssize_t)sizeof(control)) 10729 continue; 10730 10731 pos = scratch + sizeof(control); 10732 len -= sizeof(control); 10733 10734 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10735 if (!link_elems) 10736 continue; 10737 10738 if (ieee80211_sta_wmm_params(sdata->local, link, 10739 link_elems->wmm_param, 10740 link_elems->wmm_param_len, 10741 link_elems->mu_edca_param_set)) 10742 ieee80211_link_info_change_notify(sdata, link, 10743 BSS_CHANGED_QOS); 10744 } 10745 } 10746 10747 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10748 struct ieee80211_mgmt *mgmt, size_t len) 10749 { 10750 struct ieee802_11_elems *elems __free(kfree) = NULL; 10751 size_t ies_len; 10752 u16 status_code; 10753 u8 *pos, dialog_token; 10754 10755 if (!ieee80211_mgd_epcs_supp(sdata)) 10756 return; 10757 10758 /* Handle dialog token and status code */ 10759 pos = mgmt->u.action.u.epcs.variable; 10760 dialog_token = *pos; 10761 status_code = get_unaligned_le16(pos + 1); 10762 10763 /* An EPCS enable response with dialog token == 0 is an unsolicited 10764 * notification from the AP MLD. In such a case, EPCS should already be 10765 * enabled and status must be success 10766 */ 10767 if (!dialog_token && 10768 (!sdata->u.mgd.epcs.enabled || 10769 status_code != WLAN_STATUS_SUCCESS)) 10770 return; 10771 10772 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 10773 return; 10774 10775 sdata->u.mgd.epcs.dialog_token = 0; 10776 10777 if (status_code != WLAN_STATUS_SUCCESS) 10778 return; 10779 10780 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10781 ies_len = len - offsetof(struct ieee80211_mgmt, 10782 u.action.u.epcs.variable) - 10783 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10784 10785 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 10786 if (!elems) 10787 return; 10788 10789 ieee80211_ml_epcs(sdata, elems); 10790 ieee80211_epcs_changed(sdata, true); 10791 } 10792 10793 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 10794 struct ieee80211_mgmt *mgmt, size_t len) 10795 { 10796 if (!ieee80211_vif_is_mld(&sdata->vif) || 10797 !sdata->u.mgd.epcs.enabled) 10798 return; 10799 10800 ieee80211_epcs_teardown(sdata); 10801 ieee80211_epcs_changed(sdata, false); 10802 } 10803