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 return true; 780 } 781 782 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 783 { 784 if (c->width == NL80211_CHAN_WIDTH_80P80) 785 return 4 + 4; 786 787 return cfg80211_chandef_get_width(c) / 20; 788 } 789 790 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 791 { 792 switch (c->width) { 793 case NL80211_CHAN_WIDTH_20: 794 case NL80211_CHAN_WIDTH_20_NOHT: 795 return 1; 796 case NL80211_CHAN_WIDTH_40: 797 return 2; 798 case NL80211_CHAN_WIDTH_80P80: 799 case NL80211_CHAN_WIDTH_80: 800 return 3; 801 case NL80211_CHAN_WIDTH_160: 802 return 4; 803 case NL80211_CHAN_WIDTH_320: 804 return 5; 805 default: 806 WARN_ON(1); 807 return 0; 808 } 809 } 810 811 VISIBLE_IF_MAC80211_KUNIT int 812 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 813 u8 n_partial_subchans) 814 { 815 int n = ieee80211_chandef_num_subchans(ap); 816 struct cfg80211_chan_def tmp = *ap; 817 int offset = 0; 818 819 /* 820 * Given a chandef (in this context, it's the AP's) and a number 821 * of subchannels that we want to look at ('n_partial_subchans'), 822 * calculate the offset in number of subchannels between the full 823 * and the subset with the desired width. 824 */ 825 826 /* same number of subchannels means no offset, obviously */ 827 if (n == n_partial_subchans) 828 return 0; 829 830 /* don't WARN - misconfigured APs could cause this if their N > width */ 831 if (n < n_partial_subchans) 832 return 0; 833 834 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 835 u32 prev = tmp.center_freq1; 836 837 ieee80211_chandef_downgrade(&tmp, NULL); 838 839 /* 840 * if center_freq moved up, half the original channels 841 * are gone now but were below, so increase offset 842 */ 843 if (prev < tmp.center_freq1) 844 offset += ieee80211_chandef_num_subchans(&tmp); 845 } 846 847 /* 848 * 80+80 with secondary 80 below primary - four subchannels for it 849 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 850 */ 851 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 852 ap->center_freq2 < ap->center_freq1) 853 offset += 4; 854 855 return offset; 856 } 857 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 858 859 VISIBLE_IF_MAC80211_KUNIT void 860 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 861 const struct cfg80211_chan_def *ap, 862 const struct cfg80211_chan_def *used) 863 { 864 u8 needed = ieee80211_chandef_num_subchans(used); 865 u8 have = ieee80211_chandef_num_subchans(ap); 866 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 867 u8 offset; 868 869 if (!psd->valid) 870 return; 871 872 /* if N is zero, all defaults were used, no point in rearranging */ 873 if (!psd->n) 874 goto out; 875 876 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 877 878 /* 879 * This assumes that 'N' is consistent with the HE channel, as 880 * it should be (otherwise the AP is broken). 881 * 882 * In psd->power we have values in the order 0..N, 0..K, where 883 * N+K should cover the entire channel per 'ap', but even if it 884 * doesn't then we've pre-filled 'unlimited' as defaults. 885 * 886 * But this is all the wrong order, we want to have them in the 887 * order of the 'used' channel. 888 * 889 * So for example, we could have a 320 MHz EHT AP, which has the 890 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 891 * seem to be considered for the TPE), as follows: 892 * 893 * EHT 320: | | | | | | | | | | | | | | | | | 894 * HE 80: | | | | | 895 * used 160: | | | | | | | | | 896 * 897 * N entries: |--|--|--|--| 898 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 899 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 900 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 901 * used chan: 0 1 2 3 4 5 6 7 902 * 903 * The idx in the power array ('power idx') is like this since it 904 * comes directly from the element's N and K entries in their 905 * element order, and those are this way for HE compatibility. 906 * 907 * Rearrange them as desired here, first by putting them into the 908 * 'full chan' order, and then selecting the necessary subset for 909 * the 'used chan'. 910 */ 911 912 /* first reorder according to AP channel */ 913 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 914 for (int i = 0; i < have; i++) { 915 if (i < offset) 916 tmp[i] = psd->power[i + psd->n]; 917 else if (i < offset + psd->n) 918 tmp[i] = psd->power[i - offset]; 919 else 920 tmp[i] = psd->power[i]; 921 } 922 923 /* 924 * and then select the subset for the used channel 925 * (set everything to defaults first in case a driver is confused) 926 */ 927 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 928 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 929 for (int i = 0; i < needed; i++) 930 psd->power[i] = tmp[offset + i]; 931 932 out: 933 /* limit, but don't lie if there are defaults in the data */ 934 if (needed < psd->count) 935 psd->count = needed; 936 } 937 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 938 939 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 940 const struct cfg80211_chan_def *ap, 941 const struct cfg80211_chan_def *used) 942 { 943 /* ignore this completely for narrow/invalid channels */ 944 if (!ieee80211_chandef_num_subchans(ap) || 945 !ieee80211_chandef_num_subchans(used)) { 946 ieee80211_clear_tpe(tpe); 947 return; 948 } 949 950 for (int i = 0; i < 2; i++) { 951 int needed_pwr_count; 952 953 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 954 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 955 956 /* limit this to the widths we actually need */ 957 needed_pwr_count = ieee80211_chandef_num_widths(used); 958 if (needed_pwr_count < tpe->max_local[i].count) 959 tpe->max_local[i].count = needed_pwr_count; 960 if (needed_pwr_count < tpe->max_reg_client[i].count) 961 tpe->max_reg_client[i].count = needed_pwr_count; 962 } 963 } 964 965 /* 966 * The AP part of the channel request is used to distinguish settings 967 * to the device used for wider bandwidth OFDMA. This is used in the 968 * channel context code to assign two channel contexts even if they're 969 * both for the same channel, if the AP bandwidths are incompatible. 970 * If not EHT (or driver override) then ap.chan == NULL indicates that 971 * there's no wider BW OFDMA used. 972 */ 973 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 974 struct ieee80211_chan_req *chanreq, 975 struct ieee80211_conn_settings *conn, 976 struct cfg80211_chan_def *ap_chandef) 977 { 978 chanreq->ap.chan = NULL; 979 980 if (conn->mode < IEEE80211_CONN_MODE_EHT) 981 return; 982 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 983 return; 984 985 chanreq->ap = *ap_chandef; 986 } 987 988 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 989 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 990 struct ieee80211_conn_settings *conn, 991 struct cfg80211_bss *cbss, int link_id, 992 struct ieee80211_chan_req *chanreq, 993 struct cfg80211_chan_def *ap_chandef, 994 unsigned long *userspace_selectors) 995 { 996 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 997 struct ieee80211_bss *bss = (void *)cbss->priv; 998 struct ieee80211_channel *channel = cbss->channel; 999 struct ieee80211_elems_parse_params parse_params = { 1000 .link_id = -1, 1001 .from_ap = true, 1002 .start = ies->data, 1003 .len = ies->len, 1004 }; 1005 struct ieee802_11_elems *elems; 1006 struct ieee80211_supported_band *sband; 1007 enum ieee80211_conn_mode ap_mode; 1008 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1009 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1010 int ret; 1011 1012 again: 1013 parse_params.mode = conn->mode; 1014 elems = ieee802_11_parse_elems_full(&parse_params); 1015 if (!elems) 1016 return ERR_PTR(-ENOMEM); 1017 1018 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1019 elems, false, conn, ap_chandef); 1020 1021 /* this should be impossible since parsing depends on our mode */ 1022 if (WARN_ON(ap_mode > conn->mode)) { 1023 ret = -EINVAL; 1024 goto free; 1025 } 1026 1027 if (conn->mode != ap_mode) { 1028 conn->mode = ap_mode; 1029 kfree(elems); 1030 goto again; 1031 } 1032 1033 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1034 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1035 1036 sband = sdata->local->hw.wiphy->bands[channel->band]; 1037 1038 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1039 elems->ext_supp_rates, elems->ext_supp_rates_len, 1040 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1041 NULL); 1042 1043 switch (channel->band) { 1044 case NL80211_BAND_S1GHZ: 1045 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1046 ret = -EINVAL; 1047 goto free; 1048 } 1049 return elems; 1050 case NL80211_BAND_6GHZ: 1051 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1052 link_id_info(sdata, link_id, 1053 "Rejecting non-HE 6/7 GHz connection"); 1054 ret = -EINVAL; 1055 goto free; 1056 } 1057 break; 1058 default: 1059 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1060 ret = -EINVAL; 1061 goto free; 1062 } 1063 } 1064 1065 switch (ap_mode) { 1066 case IEEE80211_CONN_MODE_S1G: 1067 WARN_ON(1); 1068 ret = -EINVAL; 1069 goto free; 1070 case IEEE80211_CONN_MODE_LEGACY: 1071 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1072 break; 1073 case IEEE80211_CONN_MODE_HT: 1074 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1075 conn->bw_limit, 1076 IEEE80211_CONN_BW_LIMIT_40); 1077 break; 1078 case IEEE80211_CONN_MODE_VHT: 1079 case IEEE80211_CONN_MODE_HE: 1080 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1081 conn->bw_limit, 1082 IEEE80211_CONN_BW_LIMIT_160); 1083 break; 1084 case IEEE80211_CONN_MODE_EHT: 1085 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1086 conn->bw_limit, 1087 IEEE80211_CONN_BW_LIMIT_320); 1088 break; 1089 } 1090 1091 chanreq->oper = *ap_chandef; 1092 1093 bitmap_copy(sta_selectors, userspace_selectors, 128); 1094 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1095 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1096 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1097 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1098 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1099 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1100 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1101 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1102 1103 /* 1104 * We do not support EPD or GLK so never add them. 1105 * SAE_H2E is handled through userspace_selectors. 1106 */ 1107 1108 /* Check if we support all required features */ 1109 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1110 link_id_info(sdata, link_id, 1111 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1112 ret = -EINVAL; 1113 goto free; 1114 } 1115 1116 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1117 1118 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1119 IEEE80211_CHAN_DISABLED)) { 1120 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1121 ret = -EINVAL; 1122 goto free; 1123 } 1124 1125 ieee80211_chanreq_downgrade(chanreq, conn); 1126 } 1127 1128 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1129 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1130 IEEE80211_CHAN_NO_HE)) { 1131 conn->mode = IEEE80211_CONN_MODE_VHT; 1132 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1133 conn->bw_limit, 1134 IEEE80211_CONN_BW_LIMIT_160); 1135 } 1136 1137 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1138 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1139 IEEE80211_CHAN_NO_EHT)) { 1140 conn->mode = IEEE80211_CONN_MODE_HE; 1141 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1142 conn->bw_limit, 1143 IEEE80211_CONN_BW_LIMIT_160); 1144 } 1145 1146 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1147 link_id_info(sdata, link_id, 1148 "regulatory prevented using AP config, downgraded\n"); 1149 1150 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1151 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1152 elems->ht_operation)) { 1153 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1154 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1155 link_id_info(sdata, link_id, 1156 "required MCSes not supported, disabling HT\n"); 1157 } 1158 1159 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1160 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1161 elems->vht_operation)) { 1162 conn->mode = IEEE80211_CONN_MODE_HT; 1163 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1164 conn->bw_limit, 1165 IEEE80211_CONN_BW_LIMIT_40); 1166 link_id_info(sdata, link_id, 1167 "required MCSes not supported, disabling VHT\n"); 1168 } 1169 1170 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1171 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1172 (void *)elems->he_cap, 1173 elems->he_operation) || 1174 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1175 elems->he_operation))) { 1176 conn->mode = IEEE80211_CONN_MODE_VHT; 1177 link_id_info(sdata, link_id, 1178 "required MCSes not supported, disabling HE\n"); 1179 } 1180 1181 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1182 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1183 elems->eht_operation)) { 1184 conn->mode = IEEE80211_CONN_MODE_HE; 1185 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1186 conn->bw_limit, 1187 IEEE80211_CONN_BW_LIMIT_160); 1188 link_id_info(sdata, link_id, 1189 "required MCSes not supported, disabling EHT\n"); 1190 } 1191 1192 /* the mode can only decrease, so this must terminate */ 1193 if (ap_mode != conn->mode) { 1194 kfree(elems); 1195 goto again; 1196 } 1197 1198 mlme_link_id_dbg(sdata, link_id, 1199 "connecting with %s mode, max bandwidth %d MHz\n", 1200 ieee80211_conn_mode_str(conn->mode), 1201 20 * (1 << conn->bw_limit)); 1202 1203 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1204 ret = -EINVAL; 1205 goto free; 1206 } 1207 1208 return elems; 1209 free: 1210 kfree(elems); 1211 return ERR_PTR(ret); 1212 } 1213 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1214 1215 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1216 struct ieee802_11_elems *elems, 1217 bool update, u64 *changed, 1218 const char *frame) 1219 { 1220 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1221 struct ieee80211_sub_if_data *sdata = link->sdata; 1222 struct ieee80211_chan_req chanreq = {}; 1223 struct cfg80211_chan_def ap_chandef; 1224 enum ieee80211_conn_mode ap_mode; 1225 u32 vht_cap_info = 0; 1226 u16 ht_opmode; 1227 int ret; 1228 1229 /* don't track any bandwidth changes in legacy/S1G modes */ 1230 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1231 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1232 return 0; 1233 1234 if (elems->vht_cap_elem) 1235 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1236 1237 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1238 elems, true, &link->u.mgd.conn, 1239 &ap_chandef); 1240 1241 if (ap_mode != link->u.mgd.conn.mode) { 1242 link_info(link, 1243 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1244 link->u.mgd.bssid, 1245 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1246 ieee80211_conn_mode_str(ap_mode), frame); 1247 return -EINVAL; 1248 } 1249 1250 chanreq.oper = ap_chandef; 1251 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1252 &ap_chandef); 1253 1254 /* 1255 * if HT operation mode changed store the new one - 1256 * this may be applicable even if channel is identical 1257 */ 1258 if (elems->ht_operation) { 1259 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1260 if (link->conf->ht_operation_mode != ht_opmode) { 1261 *changed |= BSS_CHANGED_HT; 1262 link->conf->ht_operation_mode = ht_opmode; 1263 } 1264 } 1265 1266 /* 1267 * Downgrade the new channel if we associated with restricted 1268 * bandwidth capabilities. For example, if we associated as a 1269 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1270 * or config reasons) then switching to a 40 MHz channel now 1271 * won't do us any good -- we couldn't use it with the AP. 1272 */ 1273 while (link->u.mgd.conn.bw_limit < 1274 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1275 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1276 1277 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1278 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1279 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1280 &chanreq.oper); 1281 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1282 link->conf->tpe = elems->tpe; 1283 *changed |= BSS_CHANGED_TPE; 1284 } 1285 } 1286 1287 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1288 return 0; 1289 1290 link_info(link, 1291 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1292 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1293 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1294 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1295 chanreq.oper.center_freq2); 1296 1297 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1298 sdata_info(sdata, 1299 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1300 link->u.mgd.bssid, frame); 1301 return -EINVAL; 1302 } 1303 1304 if (!update) { 1305 link->conf->chanreq = chanreq; 1306 return 0; 1307 } 1308 1309 /* 1310 * We're tracking the current AP here, so don't do any further checks 1311 * here. This keeps us from playing ping-pong with regulatory, without 1312 * it the following can happen (for example): 1313 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1314 * - AP advertises regdom US 1315 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1316 * - we detect an unsupported channel and disconnect 1317 * - disconnect causes CRDA to reload world regdomain and the game 1318 * starts anew. 1319 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1320 * 1321 * It seems possible that there are still scenarios with CSA or real 1322 * bandwidth changes where a this could happen, but those cases are 1323 * less common and wouldn't completely prevent using the AP. 1324 */ 1325 1326 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1327 if (ret) { 1328 sdata_info(sdata, 1329 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1330 link->u.mgd.bssid, frame); 1331 return ret; 1332 } 1333 1334 cfg80211_schedule_channels_check(&sdata->wdev); 1335 return 0; 1336 } 1337 1338 /* frame sending functions */ 1339 1340 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1341 struct sk_buff *skb, u8 ap_ht_param, 1342 struct ieee80211_supported_band *sband, 1343 struct ieee80211_channel *channel, 1344 enum ieee80211_smps_mode smps, 1345 const struct ieee80211_conn_settings *conn) 1346 { 1347 u8 *pos; 1348 u32 flags = channel->flags; 1349 u16 cap; 1350 struct ieee80211_sta_ht_cap ht_cap; 1351 1352 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1353 1354 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1355 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1356 1357 /* determine capability flags */ 1358 cap = ht_cap.cap; 1359 1360 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1361 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1362 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1363 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1364 cap &= ~IEEE80211_HT_CAP_SGI_40; 1365 } 1366 break; 1367 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1368 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1369 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1370 cap &= ~IEEE80211_HT_CAP_SGI_40; 1371 } 1372 break; 1373 } 1374 1375 /* 1376 * If 40 MHz was disabled associate as though we weren't 1377 * capable of 40 MHz -- some broken APs will never fall 1378 * back to trying to transmit in 20 MHz. 1379 */ 1380 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1381 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1382 cap &= ~IEEE80211_HT_CAP_SGI_40; 1383 } 1384 1385 /* set SM PS mode properly */ 1386 cap &= ~IEEE80211_HT_CAP_SM_PS; 1387 switch (smps) { 1388 case IEEE80211_SMPS_AUTOMATIC: 1389 case IEEE80211_SMPS_NUM_MODES: 1390 WARN_ON(1); 1391 fallthrough; 1392 case IEEE80211_SMPS_OFF: 1393 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1394 IEEE80211_HT_CAP_SM_PS_SHIFT; 1395 break; 1396 case IEEE80211_SMPS_STATIC: 1397 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1398 IEEE80211_HT_CAP_SM_PS_SHIFT; 1399 break; 1400 case IEEE80211_SMPS_DYNAMIC: 1401 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1402 IEEE80211_HT_CAP_SM_PS_SHIFT; 1403 break; 1404 } 1405 1406 /* reserve and fill IE */ 1407 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1408 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1409 } 1410 1411 /* This function determines vht capability flags for the association 1412 * and builds the IE. 1413 * Note - the function returns true to own the MU-MIMO capability 1414 */ 1415 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1416 struct sk_buff *skb, 1417 struct ieee80211_supported_band *sband, 1418 struct ieee80211_vht_cap *ap_vht_cap, 1419 const struct ieee80211_conn_settings *conn) 1420 { 1421 struct ieee80211_local *local = sdata->local; 1422 u8 *pos; 1423 u32 cap; 1424 struct ieee80211_sta_vht_cap vht_cap; 1425 u32 mask, ap_bf_sts, our_bf_sts; 1426 bool mu_mimo_owner = false; 1427 1428 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1429 1430 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1431 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1432 1433 /* determine capability flags */ 1434 cap = vht_cap.cap; 1435 1436 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1437 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1438 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1439 } 1440 1441 /* 1442 * Some APs apparently get confused if our capabilities are better 1443 * than theirs, so restrict what we advertise in the assoc request. 1444 */ 1445 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1446 if (!(ap_vht_cap->vht_cap_info & 1447 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1448 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1449 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1450 else if (!(ap_vht_cap->vht_cap_info & 1451 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1452 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1453 } 1454 1455 /* 1456 * If some other vif is using the MU-MIMO capability we cannot associate 1457 * using MU-MIMO - this will lead to contradictions in the group-id 1458 * mechanism. 1459 * Ownership is defined since association request, in order to avoid 1460 * simultaneous associations with MU-MIMO. 1461 */ 1462 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1463 bool disable_mu_mimo = false; 1464 struct ieee80211_sub_if_data *other; 1465 1466 list_for_each_entry(other, &local->interfaces, list) { 1467 if (other->vif.bss_conf.mu_mimo_owner) { 1468 disable_mu_mimo = true; 1469 break; 1470 } 1471 } 1472 if (disable_mu_mimo) 1473 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1474 else 1475 mu_mimo_owner = true; 1476 } 1477 1478 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1479 1480 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1481 our_bf_sts = cap & mask; 1482 1483 if (ap_bf_sts < our_bf_sts) { 1484 cap &= ~mask; 1485 cap |= ap_bf_sts; 1486 } 1487 1488 /* reserve and fill IE */ 1489 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1490 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1491 1492 return mu_mimo_owner; 1493 } 1494 1495 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1496 struct sk_buff *skb, 1497 enum nl80211_chan_width width, 1498 struct ieee80211_supported_band *sband, 1499 struct ieee80211_mgd_assoc_data *assoc_data) 1500 { 1501 u32 rates; 1502 1503 if (assoc_data->supp_rates_len && 1504 !ieee80211_hw_check(&local->hw, STRICT)) { 1505 /* 1506 * Get all rates supported by the device and the AP as 1507 * some APs don't like getting a superset of their rates 1508 * in the association request (e.g. D-Link DAP 1353 in 1509 * b-only mode)... 1510 */ 1511 ieee80211_parse_bitrates(width, sband, 1512 assoc_data->supp_rates, 1513 assoc_data->supp_rates_len, 1514 &rates); 1515 } else { 1516 /* 1517 * In case AP not provide any supported rates information 1518 * before association, we send information element(s) with 1519 * all rates that we support. 1520 */ 1521 rates = ~0; 1522 } 1523 1524 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1525 WLAN_EID_SUPP_RATES); 1526 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1527 WLAN_EID_EXT_SUPP_RATES); 1528 } 1529 1530 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1531 const u8 *elems, 1532 size_t elems_len, 1533 size_t offset) 1534 { 1535 size_t noffset; 1536 1537 static const u8 before_ht[] = { 1538 WLAN_EID_SSID, 1539 WLAN_EID_SUPP_RATES, 1540 WLAN_EID_EXT_SUPP_RATES, 1541 WLAN_EID_PWR_CAPABILITY, 1542 WLAN_EID_SUPPORTED_CHANNELS, 1543 WLAN_EID_RSN, 1544 WLAN_EID_QOS_CAPA, 1545 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1546 WLAN_EID_MOBILITY_DOMAIN, 1547 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1548 WLAN_EID_RIC_DATA, /* reassoc only */ 1549 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1550 }; 1551 static const u8 after_ric[] = { 1552 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1553 WLAN_EID_HT_CAPABILITY, 1554 WLAN_EID_BSS_COEX_2040, 1555 /* luckily this is almost always there */ 1556 WLAN_EID_EXT_CAPABILITY, 1557 WLAN_EID_QOS_TRAFFIC_CAPA, 1558 WLAN_EID_TIM_BCAST_REQ, 1559 WLAN_EID_INTERWORKING, 1560 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1561 WLAN_EID_VHT_CAPABILITY, 1562 WLAN_EID_OPMODE_NOTIF, 1563 }; 1564 1565 if (!elems_len) 1566 return offset; 1567 1568 noffset = ieee80211_ie_split_ric(elems, elems_len, 1569 before_ht, 1570 ARRAY_SIZE(before_ht), 1571 after_ric, 1572 ARRAY_SIZE(after_ric), 1573 offset); 1574 skb_put_data(skb, elems + offset, noffset - offset); 1575 1576 return noffset; 1577 } 1578 1579 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1580 const u8 *elems, 1581 size_t elems_len, 1582 size_t offset) 1583 { 1584 static const u8 before_vht[] = { 1585 /* 1586 * no need to list the ones split off before HT 1587 * or generated here 1588 */ 1589 WLAN_EID_BSS_COEX_2040, 1590 WLAN_EID_EXT_CAPABILITY, 1591 WLAN_EID_QOS_TRAFFIC_CAPA, 1592 WLAN_EID_TIM_BCAST_REQ, 1593 WLAN_EID_INTERWORKING, 1594 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1595 }; 1596 size_t noffset; 1597 1598 if (!elems_len) 1599 return offset; 1600 1601 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1602 noffset = ieee80211_ie_split(elems, elems_len, 1603 before_vht, ARRAY_SIZE(before_vht), 1604 offset); 1605 skb_put_data(skb, elems + offset, noffset - offset); 1606 1607 return noffset; 1608 } 1609 1610 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1611 const u8 *elems, 1612 size_t elems_len, 1613 size_t offset) 1614 { 1615 static const u8 before_he[] = { 1616 /* 1617 * no need to list the ones split off before VHT 1618 * or generated here 1619 */ 1620 WLAN_EID_OPMODE_NOTIF, 1621 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1622 /* 11ai elements */ 1623 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1624 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1625 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1626 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1627 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1628 /* TODO: add 11ah/11aj/11ak elements */ 1629 }; 1630 size_t noffset; 1631 1632 if (!elems_len) 1633 return offset; 1634 1635 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1636 noffset = ieee80211_ie_split(elems, elems_len, 1637 before_he, ARRAY_SIZE(before_he), 1638 offset); 1639 skb_put_data(skb, elems + offset, noffset - offset); 1640 1641 return noffset; 1642 } 1643 1644 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1645 const u8 *elems, size_t elems_len, 1646 size_t offset) 1647 { 1648 static const u8 before_reg_conn[] = { 1649 /* 1650 * no need to list the ones split off before HE 1651 * or generated here 1652 */ 1653 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1654 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1655 }; 1656 size_t noffset; 1657 1658 if (!elems_len) 1659 return offset; 1660 1661 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1662 ARRAY_SIZE(before_reg_conn), offset); 1663 skb_put_data(skb, elems + offset, noffset - offset); 1664 1665 return noffset; 1666 } 1667 1668 #define PRESENT_ELEMS_MAX 8 1669 #define PRESENT_ELEM_EXT_OFFS 0x100 1670 1671 static void 1672 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1673 struct sk_buff *skb, u16 capab, 1674 const struct element *ext_capa, 1675 const u16 *present_elems, 1676 struct ieee80211_mgd_assoc_data *assoc_data); 1677 1678 static size_t 1679 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1680 struct sk_buff *skb, u16 *capab, 1681 const struct element *ext_capa, 1682 const u8 *extra_elems, 1683 size_t extra_elems_len, 1684 unsigned int link_id, 1685 struct ieee80211_link_data *link, 1686 u16 *present_elems, 1687 struct ieee80211_mgd_assoc_data *assoc_data) 1688 { 1689 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1690 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1691 struct ieee80211_channel *chan = cbss->channel; 1692 const struct ieee80211_sband_iftype_data *iftd; 1693 struct ieee80211_local *local = sdata->local; 1694 struct ieee80211_supported_band *sband; 1695 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1696 struct ieee80211_chanctx_conf *chanctx_conf; 1697 enum ieee80211_smps_mode smps_mode; 1698 u16 orig_capab = *capab; 1699 size_t offset = 0; 1700 int present_elems_len = 0; 1701 u8 *pos; 1702 int i; 1703 1704 #define ADD_PRESENT_ELEM(id) do { \ 1705 /* need a last for termination - we use 0 == SSID */ \ 1706 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1707 present_elems[present_elems_len++] = (id); \ 1708 } while (0) 1709 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1710 1711 if (link) 1712 smps_mode = link->smps_mode; 1713 else if (sdata->u.mgd.powersave) 1714 smps_mode = IEEE80211_SMPS_DYNAMIC; 1715 else 1716 smps_mode = IEEE80211_SMPS_OFF; 1717 1718 if (link) { 1719 /* 1720 * 5/10 MHz scenarios are only viable without MLO, in which 1721 * case this pointer should be used ... All of this is a bit 1722 * unclear though, not sure this even works at all. 1723 */ 1724 rcu_read_lock(); 1725 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1726 if (chanctx_conf) 1727 width = chanctx_conf->def.width; 1728 rcu_read_unlock(); 1729 } 1730 1731 sband = local->hw.wiphy->bands[chan->band]; 1732 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1733 1734 if (sband->band == NL80211_BAND_2GHZ) { 1735 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1736 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1737 } 1738 1739 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1740 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1741 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1742 1743 if (sband->band != NL80211_BAND_S1GHZ) 1744 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1745 1746 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1747 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1748 struct cfg80211_chan_def chandef = { 1749 .width = width, 1750 .chan = chan, 1751 }; 1752 1753 pos = skb_put(skb, 4); 1754 *pos++ = WLAN_EID_PWR_CAPABILITY; 1755 *pos++ = 2; 1756 *pos++ = 0; /* min tx power */ 1757 /* max tx power */ 1758 *pos++ = ieee80211_chandef_max_power(&chandef); 1759 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1760 } 1761 1762 /* 1763 * Per spec, we shouldn't include the list of channels if we advertise 1764 * support for extended channel switching, but we've always done that; 1765 * (for now?) apply this restriction only on the (new) 6 GHz band. 1766 */ 1767 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1768 (sband->band != NL80211_BAND_6GHZ || 1769 !ext_capa || ext_capa->datalen < 1 || 1770 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1771 /* TODO: get this in reg domain format */ 1772 pos = skb_put(skb, 2 * sband->n_channels + 2); 1773 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1774 *pos++ = 2 * sband->n_channels; 1775 for (i = 0; i < sband->n_channels; i++) { 1776 int cf = sband->channels[i].center_freq; 1777 1778 *pos++ = ieee80211_frequency_to_channel(cf); 1779 *pos++ = 1; /* one channel in the subband*/ 1780 } 1781 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1782 } 1783 1784 /* if present, add any custom IEs that go before HT */ 1785 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1786 extra_elems_len, 1787 offset); 1788 1789 if (sband->band != NL80211_BAND_6GHZ && 1790 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1791 ieee80211_add_ht_ie(sdata, skb, 1792 assoc_data->link[link_id].ap_ht_param, 1793 sband, chan, smps_mode, 1794 &assoc_data->link[link_id].conn); 1795 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1796 } 1797 1798 /* if present, add any custom IEs that go before VHT */ 1799 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1800 extra_elems_len, 1801 offset); 1802 1803 if (sband->band != NL80211_BAND_6GHZ && 1804 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1805 sband->vht_cap.vht_supported) { 1806 bool mu_mimo_owner = 1807 ieee80211_add_vht_ie(sdata, skb, sband, 1808 &assoc_data->link[link_id].ap_vht_cap, 1809 &assoc_data->link[link_id].conn); 1810 1811 if (link) 1812 link->conf->mu_mimo_owner = mu_mimo_owner; 1813 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1814 } 1815 1816 /* if present, add any custom IEs that go before HE */ 1817 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1818 extra_elems_len, 1819 offset); 1820 1821 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1822 ieee80211_put_he_cap(skb, sdata, sband, 1823 &assoc_data->link[link_id].conn); 1824 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1825 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1826 } 1827 1828 /* 1829 * if present, add any custom IEs that go before regulatory 1830 * connectivity element 1831 */ 1832 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1833 extra_elems_len, offset); 1834 1835 if (sband->band == NL80211_BAND_6GHZ) { 1836 /* 1837 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1838 * capable of operating on the 6 GHz band shall transmit 1839 * regulatory connectivity element. 1840 */ 1841 ieee80211_put_reg_conn(skb, chan->flags); 1842 } 1843 1844 /* 1845 * careful - need to know about all the present elems before 1846 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1847 * we're going to put it after the ML element 1848 */ 1849 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1850 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1851 1852 if (link_id == assoc_data->assoc_link_id) 1853 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1854 present_elems, assoc_data); 1855 1856 /* crash if somebody gets it wrong */ 1857 present_elems = NULL; 1858 1859 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1860 ieee80211_put_eht_cap(skb, sdata, sband, 1861 &assoc_data->link[link_id].conn); 1862 1863 if (sband->band == NL80211_BAND_S1GHZ) { 1864 ieee80211_add_aid_request_ie(sdata, skb); 1865 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1866 } 1867 1868 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1869 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1870 1871 return offset; 1872 } 1873 1874 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1875 const u16 *outer, 1876 const u16 *inner) 1877 { 1878 unsigned int skb_len = skb->len; 1879 bool at_extension = false; 1880 bool added = false; 1881 int i, j; 1882 u8 *len, *list_len = NULL; 1883 1884 skb_put_u8(skb, WLAN_EID_EXTENSION); 1885 len = skb_put(skb, 1); 1886 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1887 1888 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1889 u16 elem = outer[i]; 1890 bool have_inner = false; 1891 1892 /* should at least be sorted in the sense of normal -> ext */ 1893 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1894 1895 /* switch to extension list */ 1896 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1897 at_extension = true; 1898 if (!list_len) 1899 skb_put_u8(skb, 0); 1900 list_len = NULL; 1901 } 1902 1903 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1904 if (elem == inner[j]) { 1905 have_inner = true; 1906 break; 1907 } 1908 } 1909 1910 if (have_inner) 1911 continue; 1912 1913 if (!list_len) { 1914 list_len = skb_put(skb, 1); 1915 *list_len = 0; 1916 } 1917 *list_len += 1; 1918 skb_put_u8(skb, (u8)elem); 1919 added = true; 1920 } 1921 1922 /* if we added a list but no extension list, make a zero-len one */ 1923 if (added && (!at_extension || !list_len)) 1924 skb_put_u8(skb, 0); 1925 1926 /* if nothing added remove extension element completely */ 1927 if (!added) 1928 skb_trim(skb, skb_len); 1929 else 1930 *len = skb->len - skb_len - 2; 1931 } 1932 1933 static void 1934 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1935 struct sk_buff *skb, u16 capab, 1936 const struct element *ext_capa, 1937 const u16 *outer_present_elems, 1938 struct ieee80211_mgd_assoc_data *assoc_data) 1939 { 1940 struct ieee80211_local *local = sdata->local; 1941 struct ieee80211_multi_link_elem *ml_elem; 1942 struct ieee80211_mle_basic_common_info *common; 1943 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1944 __le16 eml_capa = 0, mld_capa_ops = 0; 1945 unsigned int link_id; 1946 u8 *ml_elem_len; 1947 void *capab_pos; 1948 1949 if (!ieee80211_vif_is_mld(&sdata->vif)) 1950 return; 1951 1952 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1953 ieee80211_vif_type_p2p(&sdata->vif)); 1954 if (ift_ext_capa) { 1955 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1956 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1957 } 1958 1959 skb_put_u8(skb, WLAN_EID_EXTENSION); 1960 ml_elem_len = skb_put(skb, 1); 1961 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1962 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1963 ml_elem->control = 1964 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1965 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1966 common = skb_put(skb, sizeof(*common)); 1967 common->len = sizeof(*common) + 1968 2; /* MLD capa/ops */ 1969 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1970 1971 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1972 if (eml_capa & 1973 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1974 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1975 common->len += 2; /* EML capabilities */ 1976 ml_elem->control |= 1977 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1978 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1979 } 1980 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1981 1982 if (assoc_data->ext_mld_capa_ops) { 1983 ml_elem->control |= 1984 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 1985 common->len += 2; 1986 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 1987 sizeof(assoc_data->ext_mld_capa_ops)); 1988 } 1989 1990 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1991 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1992 const u8 *extra_elems; 1993 size_t extra_elems_len; 1994 size_t extra_used; 1995 u8 *subelem_len = NULL; 1996 __le16 ctrl; 1997 1998 if (!assoc_data->link[link_id].bss || 1999 link_id == assoc_data->assoc_link_id) 2000 continue; 2001 2002 extra_elems = assoc_data->link[link_id].elems; 2003 extra_elems_len = assoc_data->link[link_id].elems_len; 2004 2005 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2006 subelem_len = skb_put(skb, 1); 2007 2008 ctrl = cpu_to_le16(link_id | 2009 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2010 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2011 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2012 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2013 skb_put_data(skb, assoc_data->link[link_id].addr, 2014 ETH_ALEN); 2015 /* 2016 * Now add the contents of the (re)association request, 2017 * but the "listen interval" and "current AP address" 2018 * (if applicable) are skipped. So we only have 2019 * the capability field (remember the position and fill 2020 * later), followed by the elements added below by 2021 * calling ieee80211_add_link_elems(). 2022 */ 2023 capab_pos = skb_put(skb, 2); 2024 2025 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2026 ext_capa, 2027 extra_elems, 2028 extra_elems_len, 2029 link_id, NULL, 2030 link_present_elems, 2031 assoc_data); 2032 if (extra_elems) 2033 skb_put_data(skb, extra_elems + extra_used, 2034 extra_elems_len - extra_used); 2035 2036 put_unaligned_le16(capab, capab_pos); 2037 2038 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2039 link_present_elems); 2040 2041 ieee80211_fragment_element(skb, subelem_len, 2042 IEEE80211_MLE_SUBELEM_FRAGMENT); 2043 } 2044 2045 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2046 } 2047 2048 static int 2049 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2050 enum nl80211_iftype iftype, 2051 struct cfg80211_bss *cbss, 2052 size_t elems_len) 2053 { 2054 struct ieee80211_local *local = sdata->local; 2055 const struct ieee80211_sband_iftype_data *iftd; 2056 struct ieee80211_supported_band *sband; 2057 size_t size = 0; 2058 2059 if (!cbss) 2060 return size; 2061 2062 sband = local->hw.wiphy->bands[cbss->channel->band]; 2063 2064 /* add STA profile elements length */ 2065 size += elems_len; 2066 2067 /* and supported rates length */ 2068 size += 4 + sband->n_bitrates; 2069 2070 /* supported channels */ 2071 size += 2 + 2 * sband->n_channels; 2072 2073 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2074 if (iftd) 2075 size += iftd->vendor_elems.len; 2076 2077 /* power capability */ 2078 size += 4; 2079 2080 /* HT, VHT, HE, EHT */ 2081 size += 2 + sizeof(struct ieee80211_ht_cap); 2082 size += 2 + sizeof(struct ieee80211_vht_cap); 2083 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2084 sizeof(struct ieee80211_he_mcs_nss_supp) + 2085 IEEE80211_HE_PPE_THRES_MAX_LEN; 2086 2087 if (sband->band == NL80211_BAND_6GHZ) 2088 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2089 2090 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2091 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2092 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2093 2094 return size; 2095 } 2096 2097 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2098 { 2099 struct ieee80211_local *local = sdata->local; 2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2101 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2102 struct ieee80211_link_data *link; 2103 struct sk_buff *skb; 2104 struct ieee80211_mgmt *mgmt; 2105 u8 *pos, qos_info, *ie_start; 2106 size_t offset, noffset; 2107 u16 capab = 0, link_capab; 2108 __le16 listen_int; 2109 struct element *ext_capa = NULL; 2110 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2111 struct ieee80211_prep_tx_info info = {}; 2112 unsigned int link_id, n_links = 0; 2113 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2114 void *capab_pos; 2115 size_t size; 2116 int ret; 2117 2118 /* we know it's writable, cast away the const */ 2119 if (assoc_data->ie_len) 2120 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2121 assoc_data->ie, 2122 assoc_data->ie_len); 2123 2124 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2125 2126 size = local->hw.extra_tx_headroom + 2127 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2128 2 + assoc_data->ssid_len + /* SSID */ 2129 assoc_data->ie_len + /* extra IEs */ 2130 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2131 9; /* WMM */ 2132 2133 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2134 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2135 size_t elems_len = assoc_data->link[link_id].elems_len; 2136 2137 if (!cbss) 2138 continue; 2139 2140 n_links++; 2141 2142 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2143 elems_len); 2144 2145 /* non-inheritance element */ 2146 size += 2 + 2 + PRESENT_ELEMS_MAX; 2147 2148 /* should be the same across all BSSes */ 2149 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2150 capab |= WLAN_CAPABILITY_PRIVACY; 2151 } 2152 2153 if (ieee80211_vif_is_mld(&sdata->vif)) { 2154 /* consider the multi-link element with STA profile */ 2155 size += sizeof(struct ieee80211_multi_link_elem); 2156 /* max common info field in basic multi-link element */ 2157 size += sizeof(struct ieee80211_mle_basic_common_info) + 2158 2 + /* capa & op */ 2159 2 + /* ext capa & op */ 2160 2; /* EML capa */ 2161 2162 /* 2163 * The capability elements were already considered above; 2164 * note this over-estimates a bit because there's no 2165 * STA profile for the assoc link. 2166 */ 2167 size += (n_links - 1) * 2168 (1 + 1 + /* subelement ID/length */ 2169 2 + /* STA control */ 2170 1 + ETH_ALEN + 2 /* STA Info field */); 2171 } 2172 2173 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2174 if (WARN_ON(!link)) 2175 return -EINVAL; 2176 2177 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2178 return -EINVAL; 2179 2180 skb = alloc_skb(size, GFP_KERNEL); 2181 if (!skb) 2182 return -ENOMEM; 2183 2184 skb_reserve(skb, local->hw.extra_tx_headroom); 2185 2186 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2187 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2188 2189 /* Set MBSSID support for HE AP if needed */ 2190 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2191 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2192 ext_capa && ext_capa->datalen >= 3) 2193 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2194 2195 mgmt = skb_put_zero(skb, 24); 2196 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2197 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2198 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2199 2200 listen_int = cpu_to_le16(assoc_data->s1g ? 2201 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2202 local->hw.conf.listen_interval); 2203 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2204 skb_put(skb, 10); 2205 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2206 IEEE80211_STYPE_REASSOC_REQ); 2207 capab_pos = &mgmt->u.reassoc_req.capab_info; 2208 mgmt->u.reassoc_req.listen_interval = listen_int; 2209 memcpy(mgmt->u.reassoc_req.current_ap, 2210 assoc_data->prev_ap_addr, ETH_ALEN); 2211 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2212 } else { 2213 skb_put(skb, 4); 2214 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2215 IEEE80211_STYPE_ASSOC_REQ); 2216 capab_pos = &mgmt->u.assoc_req.capab_info; 2217 mgmt->u.assoc_req.listen_interval = listen_int; 2218 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2219 } 2220 2221 /* SSID */ 2222 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2223 ie_start = pos; 2224 *pos++ = WLAN_EID_SSID; 2225 *pos++ = assoc_data->ssid_len; 2226 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2227 2228 /* 2229 * This bit is technically reserved, so it shouldn't matter for either 2230 * the AP or us, but it also means we shouldn't set it. However, we've 2231 * always set it in the past, and apparently some EHT APs check that 2232 * we don't set it. To avoid interoperability issues with old APs that 2233 * for some reason check it and want it to be set, set the bit for all 2234 * pre-EHT connections as we used to do. 2235 */ 2236 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2237 !ieee80211_hw_check(&local->hw, STRICT)) 2238 capab |= WLAN_CAPABILITY_ESS; 2239 2240 /* add the elements for the assoc (main) link */ 2241 link_capab = capab; 2242 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2243 ext_capa, 2244 assoc_data->ie, 2245 assoc_data->ie_len, 2246 assoc_data->assoc_link_id, link, 2247 present_elems, assoc_data); 2248 put_unaligned_le16(link_capab, capab_pos); 2249 2250 /* if present, add any custom non-vendor IEs */ 2251 if (assoc_data->ie_len) { 2252 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2253 assoc_data->ie_len, 2254 offset); 2255 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2256 offset = noffset; 2257 } 2258 2259 if (assoc_data->wmm) { 2260 if (assoc_data->uapsd) { 2261 qos_info = ifmgd->uapsd_queues; 2262 qos_info |= (ifmgd->uapsd_max_sp_len << 2263 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2264 } else { 2265 qos_info = 0; 2266 } 2267 2268 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2269 } 2270 2271 /* add any remaining custom (i.e. vendor specific here) IEs */ 2272 if (assoc_data->ie_len) { 2273 noffset = assoc_data->ie_len; 2274 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2275 } 2276 2277 if (assoc_data->fils_kek_len) { 2278 ret = fils_encrypt_assoc_req(skb, assoc_data); 2279 if (ret < 0) { 2280 dev_kfree_skb(skb); 2281 return ret; 2282 } 2283 } 2284 2285 pos = skb_tail_pointer(skb); 2286 kfree(ifmgd->assoc_req_ies); 2287 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2288 if (!ifmgd->assoc_req_ies) { 2289 dev_kfree_skb(skb); 2290 return -ENOMEM; 2291 } 2292 2293 ifmgd->assoc_req_ies_len = pos - ie_start; 2294 2295 info.link_id = assoc_data->assoc_link_id; 2296 drv_mgd_prepare_tx(local, sdata, &info); 2297 2298 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2299 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2300 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2301 IEEE80211_TX_INTFL_MLME_CONN_TX; 2302 ieee80211_tx_skb(sdata, skb); 2303 2304 return 0; 2305 } 2306 2307 void ieee80211_send_pspoll(struct ieee80211_local *local, 2308 struct ieee80211_sub_if_data *sdata) 2309 { 2310 struct ieee80211_pspoll *pspoll; 2311 struct sk_buff *skb; 2312 2313 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2314 if (!skb) 2315 return; 2316 2317 pspoll = (struct ieee80211_pspoll *) skb->data; 2318 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2319 2320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2321 ieee80211_tx_skb(sdata, skb); 2322 } 2323 2324 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2325 struct ieee80211_sub_if_data *sdata, 2326 bool powersave) 2327 { 2328 struct sk_buff *skb; 2329 struct ieee80211_hdr_3addr *nullfunc; 2330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2331 2332 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2333 !ieee80211_hw_check(&local->hw, 2334 DOESNT_SUPPORT_QOS_NDP)); 2335 if (!skb) 2336 return; 2337 2338 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2339 if (powersave) 2340 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2341 2342 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2343 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2344 2345 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2346 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2347 2348 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2349 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2350 2351 ieee80211_tx_skb(sdata, skb); 2352 } 2353 2354 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2355 struct ieee80211_sub_if_data *sdata) 2356 { 2357 struct sk_buff *skb; 2358 struct ieee80211_hdr *nullfunc; 2359 __le16 fc; 2360 2361 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2362 return; 2363 2364 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2365 if (!skb) 2366 return; 2367 2368 skb_reserve(skb, local->hw.extra_tx_headroom); 2369 2370 nullfunc = skb_put_zero(skb, 30); 2371 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2372 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2373 nullfunc->frame_control = fc; 2374 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2375 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2376 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2377 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2378 2379 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2380 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2381 ieee80211_tx_skb(sdata, skb); 2382 } 2383 2384 /* spectrum management related things */ 2385 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2386 struct wiphy_work *work) 2387 { 2388 struct ieee80211_link_data *link = 2389 container_of(work, struct ieee80211_link_data, 2390 u.mgd.csa.switch_work.work); 2391 struct ieee80211_sub_if_data *sdata = link->sdata; 2392 struct ieee80211_local *local = sdata->local; 2393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2394 int ret; 2395 2396 if (!ieee80211_sdata_running(sdata)) 2397 return; 2398 2399 lockdep_assert_wiphy(local->hw.wiphy); 2400 2401 if (!ifmgd->associated) 2402 return; 2403 2404 if (!link->conf->csa_active) 2405 return; 2406 2407 /* 2408 * If the link isn't active (now), we cannot wait for beacons, won't 2409 * have a reserved chanctx, etc. Just switch over the chandef and 2410 * update cfg80211 directly. 2411 */ 2412 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2413 struct link_sta_info *link_sta; 2414 struct sta_info *ap_sta; 2415 2416 link->conf->chanreq = link->csa.chanreq; 2417 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2418 link->link_id); 2419 link->conf->csa_active = false; 2420 2421 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2422 if (WARN_ON(!ap_sta)) 2423 return; 2424 2425 link_sta = wiphy_dereference(wiphy, 2426 ap_sta->link[link->link_id]); 2427 if (WARN_ON(!link_sta)) 2428 return; 2429 2430 link_sta->pub->bandwidth = 2431 _ieee80211_sta_cur_vht_bw(link_sta, 2432 &link->csa.chanreq.oper); 2433 return; 2434 } 2435 2436 /* 2437 * using reservation isn't immediate as it may be deferred until later 2438 * with multi-vif. once reservation is complete it will re-schedule the 2439 * work with no reserved_chanctx so verify chandef to check if it 2440 * completed successfully 2441 */ 2442 2443 if (link->reserved_chanctx) { 2444 /* 2445 * with multi-vif csa driver may call ieee80211_csa_finish() 2446 * many times while waiting for other interfaces to use their 2447 * reservations 2448 */ 2449 if (link->reserved_ready) 2450 return; 2451 2452 ret = ieee80211_link_use_reserved_context(link); 2453 if (ret) { 2454 link_info(link, 2455 "failed to use reserved channel context, disconnecting (err=%d)\n", 2456 ret); 2457 wiphy_work_queue(sdata->local->hw.wiphy, 2458 &ifmgd->csa_connection_drop_work); 2459 } 2460 return; 2461 } 2462 2463 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2464 &link->csa.chanreq)) { 2465 link_info(link, 2466 "failed to finalize channel switch, disconnecting\n"); 2467 wiphy_work_queue(sdata->local->hw.wiphy, 2468 &ifmgd->csa_connection_drop_work); 2469 return; 2470 } 2471 2472 link->u.mgd.csa.waiting_bcn = true; 2473 2474 /* apply new TPE restrictions immediately on the new channel */ 2475 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2476 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2477 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2478 &link->u.mgd.csa.ap_chandef, 2479 &link->conf->chanreq.oper); 2480 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2481 sizeof(link->u.mgd.csa.tpe))) { 2482 link->conf->tpe = link->u.mgd.csa.tpe; 2483 ieee80211_link_info_change_notify(sdata, link, 2484 BSS_CHANGED_TPE); 2485 } 2486 } 2487 2488 ieee80211_sta_reset_beacon_monitor(sdata); 2489 ieee80211_sta_reset_conn_monitor(sdata); 2490 } 2491 2492 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2493 { 2494 struct ieee80211_sub_if_data *sdata = link->sdata; 2495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2496 int ret; 2497 2498 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2499 2500 WARN_ON(!link->conf->csa_active); 2501 2502 ieee80211_vif_unblock_queues_csa(sdata); 2503 2504 link->conf->csa_active = false; 2505 link->u.mgd.csa.blocked_tx = false; 2506 link->u.mgd.csa.waiting_bcn = false; 2507 2508 ret = drv_post_channel_switch(link); 2509 if (ret) { 2510 link_info(link, 2511 "driver post channel switch failed, disconnecting\n"); 2512 wiphy_work_queue(sdata->local->hw.wiphy, 2513 &ifmgd->csa_connection_drop_work); 2514 return; 2515 } 2516 2517 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2518 link->link_id); 2519 } 2520 2521 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2522 unsigned int link_id) 2523 { 2524 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2525 2526 trace_api_chswitch_done(sdata, success, link_id); 2527 2528 rcu_read_lock(); 2529 2530 if (!success) { 2531 sdata_info(sdata, 2532 "driver channel switch failed (link %d), disconnecting\n", 2533 link_id); 2534 wiphy_work_queue(sdata->local->hw.wiphy, 2535 &sdata->u.mgd.csa_connection_drop_work); 2536 } else { 2537 struct ieee80211_link_data *link = 2538 rcu_dereference(sdata->link[link_id]); 2539 2540 if (WARN_ON(!link)) { 2541 rcu_read_unlock(); 2542 return; 2543 } 2544 2545 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2546 &link->u.mgd.csa.switch_work, 0); 2547 } 2548 2549 rcu_read_unlock(); 2550 } 2551 EXPORT_SYMBOL(ieee80211_chswitch_done); 2552 2553 static void 2554 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2555 { 2556 struct ieee80211_sub_if_data *sdata = link->sdata; 2557 struct ieee80211_local *local = sdata->local; 2558 2559 lockdep_assert_wiphy(local->hw.wiphy); 2560 2561 if (!local->ops->abort_channel_switch) 2562 return; 2563 2564 ieee80211_link_unreserve_chanctx(link); 2565 2566 ieee80211_vif_unblock_queues_csa(sdata); 2567 2568 link->conf->csa_active = false; 2569 link->u.mgd.csa.blocked_tx = false; 2570 2571 drv_abort_channel_switch(link); 2572 } 2573 2574 struct sta_csa_rnr_iter_data { 2575 struct ieee80211_link_data *link; 2576 struct ieee80211_channel *chan; 2577 u8 mld_id; 2578 }; 2579 2580 static enum cfg80211_rnr_iter_ret 2581 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2582 const struct ieee80211_neighbor_ap_info *info, 2583 const u8 *tbtt_info, u8 tbtt_info_len) 2584 { 2585 struct sta_csa_rnr_iter_data *data = _data; 2586 struct ieee80211_link_data *link = data->link; 2587 struct ieee80211_sub_if_data *sdata = link->sdata; 2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2589 const struct ieee80211_tbtt_info_ge_11 *ti; 2590 enum nl80211_band band; 2591 unsigned int center_freq; 2592 int link_id; 2593 2594 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2595 return RNR_ITER_CONTINUE; 2596 2597 if (tbtt_info_len < sizeof(*ti)) 2598 return RNR_ITER_CONTINUE; 2599 2600 ti = (const void *)tbtt_info; 2601 2602 if (ti->mld_params.mld_id != data->mld_id) 2603 return RNR_ITER_CONTINUE; 2604 2605 link_id = le16_get_bits(ti->mld_params.params, 2606 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2607 if (link_id != data->link->link_id) 2608 return RNR_ITER_CONTINUE; 2609 2610 /* we found the entry for our link! */ 2611 2612 /* this AP is confused, it had this right before ... just disconnect */ 2613 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2614 link_info(link, 2615 "AP now has invalid operating class in RNR, disconnect\n"); 2616 wiphy_work_queue(sdata->local->hw.wiphy, 2617 &ifmgd->csa_connection_drop_work); 2618 return RNR_ITER_BREAK; 2619 } 2620 2621 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2622 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2623 2624 return RNR_ITER_BREAK; 2625 } 2626 2627 static void 2628 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2629 struct ieee802_11_elems *elems) 2630 { 2631 struct ieee80211_sub_if_data *sdata = link->sdata; 2632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2633 struct sta_csa_rnr_iter_data data = { 2634 .link = link, 2635 }; 2636 2637 /* 2638 * If we get here, we see a beacon from another link without 2639 * CSA still being reported for it, so now we have to check 2640 * if the CSA was aborted or completed. This may not even be 2641 * perfectly possible if the CSA was only done for changing 2642 * the puncturing, but in that case if the link in inactive 2643 * we don't really care, and if it's an active link (or when 2644 * it's activated later) we'll get a beacon and adjust. 2645 */ 2646 2647 if (WARN_ON(!elems->ml_basic)) 2648 return; 2649 2650 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2651 2652 /* 2653 * So in order to do this, iterate the RNR element(s) and see 2654 * what channel is reported now. 2655 */ 2656 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2657 ieee80211_sta_csa_rnr_iter, &data); 2658 2659 if (!data.chan) { 2660 link_info(link, 2661 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2662 wiphy_work_queue(sdata->local->hw.wiphy, 2663 &ifmgd->csa_connection_drop_work); 2664 return; 2665 } 2666 2667 /* 2668 * If it doesn't match the CSA, then assume it aborted. This 2669 * may erroneously detect that it was _not_ aborted when it 2670 * was in fact aborted, but only changed the bandwidth or the 2671 * puncturing configuration, but we don't have enough data to 2672 * detect that. 2673 */ 2674 if (data.chan != link->csa.chanreq.oper.chan) 2675 ieee80211_sta_abort_chanswitch(link); 2676 } 2677 2678 enum ieee80211_csa_source { 2679 IEEE80211_CSA_SOURCE_BEACON, 2680 IEEE80211_CSA_SOURCE_OTHER_LINK, 2681 IEEE80211_CSA_SOURCE_PROT_ACTION, 2682 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2683 }; 2684 2685 static void 2686 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2687 u64 timestamp, u32 device_timestamp, 2688 struct ieee802_11_elems *full_elems, 2689 struct ieee802_11_elems *csa_elems, 2690 enum ieee80211_csa_source source) 2691 { 2692 struct ieee80211_sub_if_data *sdata = link->sdata; 2693 struct ieee80211_local *local = sdata->local; 2694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2695 struct ieee80211_chanctx *chanctx = NULL; 2696 struct ieee80211_chanctx_conf *conf; 2697 struct ieee80211_csa_ie csa_ie = {}; 2698 struct ieee80211_channel_switch ch_switch = { 2699 .link_id = link->link_id, 2700 .timestamp = timestamp, 2701 .device_timestamp = device_timestamp, 2702 }; 2703 unsigned long now; 2704 int res; 2705 2706 lockdep_assert_wiphy(local->hw.wiphy); 2707 2708 if (csa_elems) { 2709 struct cfg80211_bss *cbss = link->conf->bss; 2710 enum nl80211_band current_band; 2711 struct ieee80211_bss *bss; 2712 2713 if (WARN_ON(!cbss)) 2714 return; 2715 2716 current_band = cbss->channel->band; 2717 bss = (void *)cbss->priv; 2718 2719 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2720 current_band, 2721 bss->vht_cap_info, 2722 &link->u.mgd.conn, 2723 link->u.mgd.bssid, 2724 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2725 &csa_ie); 2726 if (res == 0) { 2727 ch_switch.block_tx = csa_ie.mode; 2728 ch_switch.chandef = csa_ie.chanreq.oper; 2729 ch_switch.count = csa_ie.count; 2730 ch_switch.delay = csa_ie.max_switch_time; 2731 } 2732 2733 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2734 } else { 2735 /* 2736 * If there was no per-STA profile for this link, we 2737 * get called with csa_elems == NULL. This of course means 2738 * there are no CSA elements, so set res=1 indicating 2739 * no more CSA. 2740 */ 2741 res = 1; 2742 } 2743 2744 if (res < 0) { 2745 /* ignore this case, not a protected frame */ 2746 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2747 return; 2748 goto drop_connection; 2749 } 2750 2751 if (link->conf->csa_active) { 2752 switch (source) { 2753 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2754 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2755 /* already processing - disregard action frames */ 2756 return; 2757 case IEEE80211_CSA_SOURCE_BEACON: 2758 if (link->u.mgd.csa.waiting_bcn) { 2759 ieee80211_chswitch_post_beacon(link); 2760 /* 2761 * If the CSA is still present after the switch 2762 * we need to consider it as a new CSA (possibly 2763 * to self). This happens by not returning here 2764 * so we'll get to the check below. 2765 */ 2766 } else if (res) { 2767 ieee80211_sta_abort_chanswitch(link); 2768 return; 2769 } else { 2770 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2771 return; 2772 } 2773 break; 2774 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2775 /* active link: we want to see the beacon to continue */ 2776 if (ieee80211_vif_link_active(&sdata->vif, 2777 link->link_id)) 2778 return; 2779 2780 /* switch work ran, so just complete the process */ 2781 if (link->u.mgd.csa.waiting_bcn) { 2782 ieee80211_chswitch_post_beacon(link); 2783 /* 2784 * If the CSA is still present after the switch 2785 * we need to consider it as a new CSA (possibly 2786 * to self). This happens by not returning here 2787 * so we'll get to the check below. 2788 */ 2789 break; 2790 } 2791 2792 /* link still has CSA but we already know, do nothing */ 2793 if (!res) 2794 return; 2795 2796 /* check in the RNR if the CSA aborted */ 2797 ieee80211_sta_other_link_csa_disappeared(link, 2798 full_elems); 2799 return; 2800 } 2801 } 2802 2803 /* no active CSA nor a new one */ 2804 if (res) { 2805 /* 2806 * However, we may have stopped queues when receiving a public 2807 * action frame that couldn't be protected, if it had the quiet 2808 * bit set. This is a trade-off, we want to be quiet as soon as 2809 * possible, but also don't trust the public action frame much, 2810 * as it can't be protected. 2811 */ 2812 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2813 link->u.mgd.csa.blocked_tx = false; 2814 ieee80211_vif_unblock_queues_csa(sdata); 2815 } 2816 return; 2817 } 2818 2819 /* 2820 * We don't really trust public action frames, but block queues (go to 2821 * quiet mode) for them anyway, we should get a beacon soon to either 2822 * know what the CSA really is, or figure out the public action frame 2823 * was actually an attack. 2824 */ 2825 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2826 if (csa_ie.mode) { 2827 link->u.mgd.csa.blocked_tx = true; 2828 ieee80211_vif_block_queues_csa(sdata); 2829 } 2830 return; 2831 } 2832 2833 if (link->conf->chanreq.oper.chan->band != 2834 csa_ie.chanreq.oper.chan->band) { 2835 link_info(link, 2836 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2837 link->u.mgd.bssid, 2838 csa_ie.chanreq.oper.chan->center_freq, 2839 csa_ie.chanreq.oper.width, 2840 csa_ie.chanreq.oper.center_freq1, 2841 csa_ie.chanreq.oper.center_freq2); 2842 goto drop_connection; 2843 } 2844 2845 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2846 IEEE80211_CHAN_DISABLED)) { 2847 link_info(link, 2848 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2849 link->u.mgd.bssid, 2850 csa_ie.chanreq.oper.chan->center_freq, 2851 csa_ie.chanreq.oper.chan->freq_offset, 2852 csa_ie.chanreq.oper.width, 2853 csa_ie.chanreq.oper.center_freq1, 2854 csa_ie.chanreq.oper.freq1_offset, 2855 csa_ie.chanreq.oper.center_freq2); 2856 goto drop_connection; 2857 } 2858 2859 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2860 &link->conf->chanreq.oper) && 2861 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2862 if (link->u.mgd.csa.ignored_same_chan) 2863 return; 2864 link_info(link, 2865 "AP %pM tries to chanswitch to same channel, ignore\n", 2866 link->u.mgd.bssid); 2867 link->u.mgd.csa.ignored_same_chan = true; 2868 return; 2869 } 2870 2871 /* 2872 * Drop all TDLS peers on the affected link - either we disconnect or 2873 * move to a different channel from this point on. There's no telling 2874 * what our peer will do. 2875 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2876 * have an incompatible wider chandef. 2877 */ 2878 ieee80211_teardown_tdls_peers(link); 2879 2880 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2881 lockdep_is_held(&local->hw.wiphy->mtx)); 2882 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2883 link_info(link, 2884 "no channel context assigned to vif?, disconnecting\n"); 2885 goto drop_connection; 2886 } 2887 2888 if (conf) 2889 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2890 2891 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2892 link_info(link, 2893 "driver doesn't support chan-switch with channel contexts\n"); 2894 goto drop_connection; 2895 } 2896 2897 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2898 link_info(link, 2899 "preparing for channel switch failed, disconnecting\n"); 2900 goto drop_connection; 2901 } 2902 2903 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2904 2905 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2906 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2907 &csa_ie.chanreq.ap); 2908 2909 if (chanctx) { 2910 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2911 chanctx->mode, false); 2912 if (res) { 2913 link_info(link, 2914 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2915 res); 2916 goto drop_connection; 2917 } 2918 } 2919 2920 link->conf->csa_active = true; 2921 link->u.mgd.csa.ignored_same_chan = false; 2922 link->u.mgd.beacon_crc_valid = false; 2923 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2924 2925 if (csa_ie.mode) 2926 ieee80211_vif_block_queues_csa(sdata); 2927 2928 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2929 link->link_id, csa_ie.count, 2930 csa_ie.mode); 2931 2932 /* we may have to handle timeout for deactivated link in software */ 2933 now = jiffies; 2934 link->u.mgd.csa.time = now + 2935 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2936 link->conf->beacon_int); 2937 2938 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2939 local->ops->channel_switch) { 2940 /* 2941 * Use driver's channel switch callback, the driver will 2942 * later call ieee80211_chswitch_done(). It may deactivate 2943 * the link as well, we handle that elsewhere and queue 2944 * the csa.switch_work for the calculated time then. 2945 */ 2946 drv_channel_switch(local, sdata, &ch_switch); 2947 return; 2948 } 2949 2950 /* channel switch handled in software */ 2951 wiphy_delayed_work_queue(local->hw.wiphy, 2952 &link->u.mgd.csa.switch_work, 2953 link->u.mgd.csa.time - now); 2954 return; 2955 drop_connection: 2956 /* 2957 * This is just so that the disconnect flow will know that 2958 * we were trying to switch channel and failed. In case the 2959 * mode is 1 (we are not allowed to Tx), we will know not to 2960 * send a deauthentication frame. Those two fields will be 2961 * reset when the disconnection worker runs. 2962 */ 2963 link->conf->csa_active = true; 2964 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2965 2966 wiphy_work_queue(sdata->local->hw.wiphy, 2967 &ifmgd->csa_connection_drop_work); 2968 } 2969 2970 struct sta_bss_param_ch_cnt_data { 2971 struct ieee80211_sub_if_data *sdata; 2972 u8 reporting_link_id; 2973 u8 mld_id; 2974 }; 2975 2976 static enum cfg80211_rnr_iter_ret 2977 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2978 const struct ieee80211_neighbor_ap_info *info, 2979 const u8 *tbtt_info, u8 tbtt_info_len) 2980 { 2981 struct sta_bss_param_ch_cnt_data *data = _data; 2982 struct ieee80211_sub_if_data *sdata = data->sdata; 2983 const struct ieee80211_tbtt_info_ge_11 *ti; 2984 u8 bss_param_ch_cnt; 2985 int link_id; 2986 2987 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2988 return RNR_ITER_CONTINUE; 2989 2990 if (tbtt_info_len < sizeof(*ti)) 2991 return RNR_ITER_CONTINUE; 2992 2993 ti = (const void *)tbtt_info; 2994 2995 if (ti->mld_params.mld_id != data->mld_id) 2996 return RNR_ITER_CONTINUE; 2997 2998 link_id = le16_get_bits(ti->mld_params.params, 2999 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3000 bss_param_ch_cnt = 3001 le16_get_bits(ti->mld_params.params, 3002 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3003 3004 if (bss_param_ch_cnt != 255 && 3005 link_id < ARRAY_SIZE(sdata->link)) { 3006 struct ieee80211_link_data *link = 3007 sdata_dereference(sdata->link[link_id], sdata); 3008 3009 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3010 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3011 link->conf->bss_param_ch_cnt_link_id = 3012 data->reporting_link_id; 3013 } 3014 } 3015 3016 return RNR_ITER_CONTINUE; 3017 } 3018 3019 static void 3020 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3021 struct ieee80211_bss_conf *bss_conf, 3022 struct ieee802_11_elems *elems) 3023 { 3024 struct sta_bss_param_ch_cnt_data data = { 3025 .reporting_link_id = bss_conf->link_id, 3026 .sdata = sdata, 3027 }; 3028 int bss_param_ch_cnt; 3029 3030 if (!elems->ml_basic) 3031 return; 3032 3033 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3034 3035 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3036 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3037 3038 bss_param_ch_cnt = 3039 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3040 3041 /* 3042 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3043 * didn't change to indicate that we got a beacon on our own 3044 * link. 3045 */ 3046 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3047 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3048 bss_conf->bss_param_ch_cnt_link_id = 3049 bss_conf->link_id; 3050 } 3051 } 3052 3053 static bool 3054 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3055 const u8 *country_ie, u8 country_ie_len, 3056 const u8 *pwr_constr_elem, 3057 int *chan_pwr, int *pwr_reduction) 3058 { 3059 struct ieee80211_country_ie_triplet *triplet; 3060 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3061 int i, chan_increment; 3062 bool have_chan_pwr = false; 3063 3064 /* Invalid IE */ 3065 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3066 return false; 3067 3068 triplet = (void *)(country_ie + 3); 3069 country_ie_len -= 3; 3070 3071 switch (channel->band) { 3072 default: 3073 WARN_ON_ONCE(1); 3074 fallthrough; 3075 case NL80211_BAND_2GHZ: 3076 case NL80211_BAND_60GHZ: 3077 case NL80211_BAND_LC: 3078 chan_increment = 1; 3079 break; 3080 case NL80211_BAND_5GHZ: 3081 chan_increment = 4; 3082 break; 3083 case NL80211_BAND_6GHZ: 3084 /* 3085 * In the 6 GHz band, the "maximum transmit power level" 3086 * field in the triplets is reserved, and thus will be 3087 * zero and we shouldn't use it to control TX power. 3088 * The actual TX power will be given in the transmit 3089 * power envelope element instead. 3090 */ 3091 return false; 3092 } 3093 3094 /* find channel */ 3095 while (country_ie_len >= 3) { 3096 u8 first_channel = triplet->chans.first_channel; 3097 3098 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3099 goto next; 3100 3101 for (i = 0; i < triplet->chans.num_channels; i++) { 3102 if (first_channel + i * chan_increment == chan) { 3103 have_chan_pwr = true; 3104 *chan_pwr = triplet->chans.max_power; 3105 break; 3106 } 3107 } 3108 if (have_chan_pwr) 3109 break; 3110 3111 next: 3112 triplet++; 3113 country_ie_len -= 3; 3114 } 3115 3116 if (have_chan_pwr && pwr_constr_elem) 3117 *pwr_reduction = *pwr_constr_elem; 3118 else 3119 *pwr_reduction = 0; 3120 3121 return have_chan_pwr; 3122 } 3123 3124 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3125 const u8 *cisco_dtpc_ie, 3126 int *pwr_level) 3127 { 3128 /* From practical testing, the first data byte of the DTPC element 3129 * seems to contain the requested dBm level, and the CLI on Cisco 3130 * APs clearly state the range is -127 to 127 dBm, which indicates 3131 * a signed byte, although it seemingly never actually goes negative. 3132 * The other byte seems to always be zero. 3133 */ 3134 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3135 } 3136 3137 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3138 struct ieee80211_channel *channel, 3139 struct ieee80211_mgmt *mgmt, 3140 const u8 *country_ie, u8 country_ie_len, 3141 const u8 *pwr_constr_ie, 3142 const u8 *cisco_dtpc_ie) 3143 { 3144 struct ieee80211_sub_if_data *sdata = link->sdata; 3145 bool has_80211h_pwr = false, has_cisco_pwr = false; 3146 int chan_pwr = 0, pwr_reduction_80211h = 0; 3147 int pwr_level_cisco, pwr_level_80211h; 3148 int new_ap_level; 3149 __le16 capab = mgmt->u.probe_resp.capab_info; 3150 3151 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3152 return 0; /* TODO */ 3153 3154 if (country_ie && 3155 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3156 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3157 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3158 channel, country_ie, country_ie_len, 3159 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3160 pwr_level_80211h = 3161 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3162 } 3163 3164 if (cisco_dtpc_ie) { 3165 ieee80211_find_cisco_dtpc( 3166 channel, cisco_dtpc_ie, &pwr_level_cisco); 3167 has_cisco_pwr = true; 3168 } 3169 3170 if (!has_80211h_pwr && !has_cisco_pwr) 3171 return 0; 3172 3173 /* If we have both 802.11h and Cisco DTPC, apply both limits 3174 * by picking the smallest of the two power levels advertised. 3175 */ 3176 if (has_80211h_pwr && 3177 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3178 new_ap_level = pwr_level_80211h; 3179 3180 if (link->ap_power_level == new_ap_level) 3181 return 0; 3182 3183 sdata_dbg(sdata, 3184 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3185 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3186 link->u.mgd.bssid); 3187 } else { /* has_cisco_pwr is always true here. */ 3188 new_ap_level = pwr_level_cisco; 3189 3190 if (link->ap_power_level == new_ap_level) 3191 return 0; 3192 3193 sdata_dbg(sdata, 3194 "Limiting TX power to %d dBm as advertised by %pM\n", 3195 pwr_level_cisco, link->u.mgd.bssid); 3196 } 3197 3198 link->ap_power_level = new_ap_level; 3199 if (__ieee80211_recalc_txpower(link)) 3200 return BSS_CHANGED_TXPOWER; 3201 return 0; 3202 } 3203 3204 /* powersave */ 3205 static void ieee80211_enable_ps(struct ieee80211_local *local, 3206 struct ieee80211_sub_if_data *sdata) 3207 { 3208 struct ieee80211_conf *conf = &local->hw.conf; 3209 3210 /* 3211 * If we are scanning right now then the parameters will 3212 * take effect when scan finishes. 3213 */ 3214 if (local->scanning) 3215 return; 3216 3217 if (conf->dynamic_ps_timeout > 0 && 3218 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3219 mod_timer(&local->dynamic_ps_timer, jiffies + 3220 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3221 } else { 3222 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3223 ieee80211_send_nullfunc(local, sdata, true); 3224 3225 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3226 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3227 return; 3228 3229 conf->flags |= IEEE80211_CONF_PS; 3230 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3231 } 3232 } 3233 3234 static void ieee80211_change_ps(struct ieee80211_local *local) 3235 { 3236 struct ieee80211_conf *conf = &local->hw.conf; 3237 3238 if (local->ps_sdata) { 3239 ieee80211_enable_ps(local, local->ps_sdata); 3240 } else if (conf->flags & IEEE80211_CONF_PS) { 3241 conf->flags &= ~IEEE80211_CONF_PS; 3242 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3243 timer_delete_sync(&local->dynamic_ps_timer); 3244 wiphy_work_cancel(local->hw.wiphy, 3245 &local->dynamic_ps_enable_work); 3246 } 3247 } 3248 3249 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3250 { 3251 struct ieee80211_local *local = sdata->local; 3252 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3253 struct sta_info *sta = NULL; 3254 bool authorized = false; 3255 3256 if (!mgd->powersave) 3257 return false; 3258 3259 if (mgd->broken_ap) 3260 return false; 3261 3262 if (!mgd->associated) 3263 return false; 3264 3265 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3266 return false; 3267 3268 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3269 !sdata->deflink.u.mgd.have_beacon) 3270 return false; 3271 3272 rcu_read_lock(); 3273 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3274 if (sta) 3275 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3276 rcu_read_unlock(); 3277 3278 return authorized; 3279 } 3280 3281 /* need to hold RTNL or interface lock */ 3282 void ieee80211_recalc_ps(struct ieee80211_local *local) 3283 { 3284 struct ieee80211_sub_if_data *sdata, *found = NULL; 3285 int count = 0; 3286 int timeout; 3287 3288 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3289 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3290 local->ps_sdata = NULL; 3291 return; 3292 } 3293 3294 list_for_each_entry(sdata, &local->interfaces, list) { 3295 if (!ieee80211_sdata_running(sdata)) 3296 continue; 3297 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3298 /* If an AP vif is found, then disable PS 3299 * by setting the count to zero thereby setting 3300 * ps_sdata to NULL. 3301 */ 3302 count = 0; 3303 break; 3304 } 3305 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3306 continue; 3307 found = sdata; 3308 count++; 3309 } 3310 3311 if (count == 1 && ieee80211_powersave_allowed(found)) { 3312 u8 dtimper = found->deflink.u.mgd.dtim_period; 3313 3314 timeout = local->dynamic_ps_forced_timeout; 3315 if (timeout < 0) 3316 timeout = 100; 3317 local->hw.conf.dynamic_ps_timeout = timeout; 3318 3319 /* If the TIM IE is invalid, pretend the value is 1 */ 3320 if (!dtimper) 3321 dtimper = 1; 3322 3323 local->hw.conf.ps_dtim_period = dtimper; 3324 local->ps_sdata = found; 3325 } else { 3326 local->ps_sdata = NULL; 3327 } 3328 3329 ieee80211_change_ps(local); 3330 } 3331 3332 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3333 { 3334 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3335 3336 if (sdata->vif.cfg.ps != ps_allowed) { 3337 sdata->vif.cfg.ps = ps_allowed; 3338 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3339 } 3340 } 3341 3342 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3343 struct wiphy_work *work) 3344 { 3345 struct ieee80211_local *local = 3346 container_of(work, struct ieee80211_local, 3347 dynamic_ps_disable_work); 3348 3349 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3350 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3351 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3352 } 3353 3354 ieee80211_wake_queues_by_reason(&local->hw, 3355 IEEE80211_MAX_QUEUE_MAP, 3356 IEEE80211_QUEUE_STOP_REASON_PS, 3357 false); 3358 } 3359 3360 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3361 struct wiphy_work *work) 3362 { 3363 struct ieee80211_local *local = 3364 container_of(work, struct ieee80211_local, 3365 dynamic_ps_enable_work); 3366 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3367 struct ieee80211_if_managed *ifmgd; 3368 unsigned long flags; 3369 int q; 3370 3371 /* can only happen when PS was just disabled anyway */ 3372 if (!sdata) 3373 return; 3374 3375 ifmgd = &sdata->u.mgd; 3376 3377 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3378 return; 3379 3380 if (local->hw.conf.dynamic_ps_timeout > 0) { 3381 /* don't enter PS if TX frames are pending */ 3382 if (drv_tx_frames_pending(local)) { 3383 mod_timer(&local->dynamic_ps_timer, jiffies + 3384 msecs_to_jiffies( 3385 local->hw.conf.dynamic_ps_timeout)); 3386 return; 3387 } 3388 3389 /* 3390 * transmission can be stopped by others which leads to 3391 * dynamic_ps_timer expiry. Postpone the ps timer if it 3392 * is not the actual idle state. 3393 */ 3394 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3395 for (q = 0; q < local->hw.queues; q++) { 3396 if (local->queue_stop_reasons[q]) { 3397 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3398 flags); 3399 mod_timer(&local->dynamic_ps_timer, jiffies + 3400 msecs_to_jiffies( 3401 local->hw.conf.dynamic_ps_timeout)); 3402 return; 3403 } 3404 } 3405 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3406 } 3407 3408 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3409 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3410 if (drv_tx_frames_pending(local)) { 3411 mod_timer(&local->dynamic_ps_timer, jiffies + 3412 msecs_to_jiffies( 3413 local->hw.conf.dynamic_ps_timeout)); 3414 } else { 3415 ieee80211_send_nullfunc(local, sdata, true); 3416 /* Flush to get the tx status of nullfunc frame */ 3417 ieee80211_flush_queues(local, sdata, false); 3418 } 3419 } 3420 3421 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3422 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3423 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3424 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3425 local->hw.conf.flags |= IEEE80211_CONF_PS; 3426 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3427 } 3428 } 3429 3430 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3431 { 3432 struct ieee80211_local *local = timer_container_of(local, t, 3433 dynamic_ps_timer); 3434 3435 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3436 } 3437 3438 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3439 { 3440 struct ieee80211_link_data *link = 3441 container_of(work, struct ieee80211_link_data, 3442 dfs_cac_timer_work.work); 3443 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3444 struct ieee80211_sub_if_data *sdata = link->sdata; 3445 3446 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3447 3448 if (sdata->wdev.links[link->link_id].cac_started) { 3449 ieee80211_link_release_channel(link); 3450 cfg80211_cac_event(sdata->dev, &chandef, 3451 NL80211_RADAR_CAC_FINISHED, 3452 GFP_KERNEL, link->link_id); 3453 } 3454 } 3455 3456 static bool 3457 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3458 { 3459 struct ieee80211_local *local = sdata->local; 3460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3461 bool ret = false; 3462 int ac; 3463 3464 if (local->hw.queues < IEEE80211_NUM_ACS) 3465 return false; 3466 3467 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3468 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3469 int non_acm_ac; 3470 unsigned long now = jiffies; 3471 3472 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3473 tx_tspec->admitted_time && 3474 time_after(now, tx_tspec->time_slice_start + HZ)) { 3475 tx_tspec->consumed_tx_time = 0; 3476 tx_tspec->time_slice_start = now; 3477 3478 if (tx_tspec->downgraded) 3479 tx_tspec->action = 3480 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3481 } 3482 3483 switch (tx_tspec->action) { 3484 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3485 /* take the original parameters */ 3486 if (drv_conf_tx(local, &sdata->deflink, ac, 3487 &sdata->deflink.tx_conf[ac])) 3488 link_err(&sdata->deflink, 3489 "failed to set TX queue parameters for queue %d\n", 3490 ac); 3491 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3492 tx_tspec->downgraded = false; 3493 ret = true; 3494 break; 3495 case TX_TSPEC_ACTION_DOWNGRADE: 3496 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3497 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3498 ret = true; 3499 break; 3500 } 3501 /* downgrade next lower non-ACM AC */ 3502 for (non_acm_ac = ac + 1; 3503 non_acm_ac < IEEE80211_NUM_ACS; 3504 non_acm_ac++) 3505 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3506 break; 3507 /* Usually the loop will result in using BK even if it 3508 * requires admission control, but such a configuration 3509 * makes no sense and we have to transmit somehow - the 3510 * AC selection does the same thing. 3511 * If we started out trying to downgrade from BK, then 3512 * the extra condition here might be needed. 3513 */ 3514 if (non_acm_ac >= IEEE80211_NUM_ACS) 3515 non_acm_ac = IEEE80211_AC_BK; 3516 if (drv_conf_tx(local, &sdata->deflink, ac, 3517 &sdata->deflink.tx_conf[non_acm_ac])) 3518 link_err(&sdata->deflink, 3519 "failed to set TX queue parameters for queue %d\n", 3520 ac); 3521 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3522 ret = true; 3523 wiphy_delayed_work_queue(local->hw.wiphy, 3524 &ifmgd->tx_tspec_wk, 3525 tx_tspec->time_slice_start + 3526 HZ - now + 1); 3527 break; 3528 case TX_TSPEC_ACTION_NONE: 3529 /* nothing now */ 3530 break; 3531 } 3532 } 3533 3534 return ret; 3535 } 3536 3537 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3538 { 3539 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3540 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3541 BSS_CHANGED_QOS); 3542 } 3543 3544 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3545 struct wiphy_work *work) 3546 { 3547 struct ieee80211_sub_if_data *sdata; 3548 3549 sdata = container_of(work, struct ieee80211_sub_if_data, 3550 u.mgd.tx_tspec_wk.work); 3551 ieee80211_sta_handle_tspec_ac_params(sdata); 3552 } 3553 3554 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3555 { 3556 struct ieee80211_sub_if_data *sdata = link->sdata; 3557 struct ieee80211_local *local = sdata->local; 3558 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3559 struct ieee80211_tx_queue_params *params = link->tx_conf; 3560 u8 ac; 3561 3562 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3563 mlme_dbg(sdata, 3564 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3565 ac, params[ac].acm, 3566 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3567 params[ac].txop, params[ac].uapsd, 3568 ifmgd->tx_tspec[ac].downgraded); 3569 if (!ifmgd->tx_tspec[ac].downgraded && 3570 drv_conf_tx(local, link, ac, ¶ms[ac])) 3571 link_err(link, 3572 "failed to set TX queue parameters for AC %d\n", 3573 ac); 3574 } 3575 } 3576 3577 /* MLME */ 3578 static bool 3579 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3580 struct ieee80211_link_data *link, 3581 const u8 *wmm_param, size_t wmm_param_len, 3582 const struct ieee80211_mu_edca_param_set *mu_edca) 3583 { 3584 struct ieee80211_sub_if_data *sdata = link->sdata; 3585 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3587 size_t left; 3588 int count, mu_edca_count, ac; 3589 const u8 *pos; 3590 u8 uapsd_queues = 0; 3591 3592 if (!local->ops->conf_tx) 3593 return false; 3594 3595 if (local->hw.queues < IEEE80211_NUM_ACS) 3596 return false; 3597 3598 if (!wmm_param) 3599 return false; 3600 3601 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3602 return false; 3603 3604 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3605 uapsd_queues = ifmgd->uapsd_queues; 3606 3607 count = wmm_param[6] & 0x0f; 3608 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3609 * if mu_edca was preset before and now it disappeared tell 3610 * the driver about it. 3611 */ 3612 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3613 if (count == link->u.mgd.wmm_last_param_set && 3614 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3615 return false; 3616 link->u.mgd.wmm_last_param_set = count; 3617 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3618 3619 pos = wmm_param + 8; 3620 left = wmm_param_len - 8; 3621 3622 memset(¶ms, 0, sizeof(params)); 3623 3624 sdata->wmm_acm = 0; 3625 for (; left >= 4; left -= 4, pos += 4) { 3626 int aci = (pos[0] >> 5) & 0x03; 3627 int acm = (pos[0] >> 4) & 0x01; 3628 bool uapsd = false; 3629 3630 switch (aci) { 3631 case 1: /* AC_BK */ 3632 ac = IEEE80211_AC_BK; 3633 if (acm) 3634 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3635 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3636 uapsd = true; 3637 params[ac].mu_edca = !!mu_edca; 3638 if (mu_edca) 3639 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3640 break; 3641 case 2: /* AC_VI */ 3642 ac = IEEE80211_AC_VI; 3643 if (acm) 3644 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3645 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3646 uapsd = true; 3647 params[ac].mu_edca = !!mu_edca; 3648 if (mu_edca) 3649 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3650 break; 3651 case 3: /* AC_VO */ 3652 ac = IEEE80211_AC_VO; 3653 if (acm) 3654 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3655 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3656 uapsd = true; 3657 params[ac].mu_edca = !!mu_edca; 3658 if (mu_edca) 3659 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3660 break; 3661 case 0: /* AC_BE */ 3662 default: 3663 ac = IEEE80211_AC_BE; 3664 if (acm) 3665 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3666 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3667 uapsd = true; 3668 params[ac].mu_edca = !!mu_edca; 3669 if (mu_edca) 3670 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3671 break; 3672 } 3673 3674 params[ac].aifs = pos[0] & 0x0f; 3675 3676 if (params[ac].aifs < 2) { 3677 link_info(link, 3678 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3679 params[ac].aifs, aci); 3680 params[ac].aifs = 2; 3681 } 3682 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3683 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3684 params[ac].txop = get_unaligned_le16(pos + 2); 3685 params[ac].acm = acm; 3686 params[ac].uapsd = uapsd; 3687 3688 if (params[ac].cw_min == 0 || 3689 params[ac].cw_min > params[ac].cw_max) { 3690 link_info(link, 3691 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3692 params[ac].cw_min, params[ac].cw_max, aci); 3693 return false; 3694 } 3695 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3696 } 3697 3698 /* WMM specification requires all 4 ACIs. */ 3699 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3700 if (params[ac].cw_min == 0) { 3701 link_info(link, 3702 "AP has invalid WMM params (missing AC %d), using defaults\n", 3703 ac); 3704 return false; 3705 } 3706 } 3707 3708 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3709 link->tx_conf[ac] = params[ac]; 3710 3711 return true; 3712 } 3713 3714 static bool 3715 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3716 struct ieee80211_link_data *link, 3717 const u8 *wmm_param, size_t wmm_param_len, 3718 const struct ieee80211_mu_edca_param_set *mu_edca) 3719 { 3720 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3721 mu_edca)) 3722 return false; 3723 3724 ieee80211_mgd_set_link_qos_params(link); 3725 3726 /* enable WMM or activate new settings */ 3727 link->conf->qos = true; 3728 return true; 3729 } 3730 3731 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3732 { 3733 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3734 3735 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3736 ieee80211_run_deferred_scan(sdata->local); 3737 } 3738 3739 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3740 { 3741 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3742 3743 __ieee80211_stop_poll(sdata); 3744 } 3745 3746 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3747 u16 capab, bool erp_valid, u8 erp) 3748 { 3749 struct ieee80211_bss_conf *bss_conf = link->conf; 3750 struct ieee80211_supported_band *sband; 3751 u64 changed = 0; 3752 bool use_protection; 3753 bool use_short_preamble; 3754 bool use_short_slot; 3755 3756 sband = ieee80211_get_link_sband(link); 3757 if (!sband) 3758 return changed; 3759 3760 if (erp_valid) { 3761 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3762 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3763 } else { 3764 use_protection = false; 3765 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3766 } 3767 3768 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3769 if (sband->band == NL80211_BAND_5GHZ || 3770 sband->band == NL80211_BAND_6GHZ) 3771 use_short_slot = true; 3772 3773 if (use_protection != bss_conf->use_cts_prot) { 3774 bss_conf->use_cts_prot = use_protection; 3775 changed |= BSS_CHANGED_ERP_CTS_PROT; 3776 } 3777 3778 if (use_short_preamble != bss_conf->use_short_preamble) { 3779 bss_conf->use_short_preamble = use_short_preamble; 3780 changed |= BSS_CHANGED_ERP_PREAMBLE; 3781 } 3782 3783 if (use_short_slot != bss_conf->use_short_slot) { 3784 bss_conf->use_short_slot = use_short_slot; 3785 changed |= BSS_CHANGED_ERP_SLOT; 3786 } 3787 3788 return changed; 3789 } 3790 3791 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3792 struct cfg80211_bss *cbss) 3793 { 3794 struct ieee80211_sub_if_data *sdata = link->sdata; 3795 struct ieee80211_bss_conf *bss_conf = link->conf; 3796 struct ieee80211_bss *bss = (void *)cbss->priv; 3797 u64 changed = BSS_CHANGED_QOS; 3798 3799 /* not really used in MLO */ 3800 sdata->u.mgd.beacon_timeout = 3801 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3802 bss_conf->beacon_int)); 3803 3804 changed |= ieee80211_handle_bss_capability(link, 3805 bss_conf->assoc_capability, 3806 bss->has_erp_value, 3807 bss->erp_value); 3808 3809 ieee80211_check_rate_mask(link); 3810 3811 link->conf->bss = cbss; 3812 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3813 3814 if (sdata->vif.p2p || 3815 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3816 const struct cfg80211_bss_ies *ies; 3817 3818 rcu_read_lock(); 3819 ies = rcu_dereference(cbss->ies); 3820 if (ies) { 3821 int ret; 3822 3823 ret = cfg80211_get_p2p_attr( 3824 ies->data, ies->len, 3825 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3826 (u8 *) &bss_conf->p2p_noa_attr, 3827 sizeof(bss_conf->p2p_noa_attr)); 3828 if (ret >= 2) { 3829 link->u.mgd.p2p_noa_index = 3830 bss_conf->p2p_noa_attr.index; 3831 changed |= BSS_CHANGED_P2P_PS; 3832 } 3833 } 3834 rcu_read_unlock(); 3835 } 3836 3837 if (link->u.mgd.have_beacon) { 3838 bss_conf->beacon_rate = bss->beacon_rate; 3839 changed |= BSS_CHANGED_BEACON_INFO; 3840 } else { 3841 bss_conf->beacon_rate = NULL; 3842 } 3843 3844 /* Tell the driver to monitor connection quality (if supported) */ 3845 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3846 bss_conf->cqm_rssi_thold) 3847 changed |= BSS_CHANGED_CQM; 3848 3849 return changed; 3850 } 3851 3852 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3853 struct ieee80211_mgd_assoc_data *assoc_data, 3854 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3855 { 3856 struct ieee80211_local *local = sdata->local; 3857 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3858 u64 vif_changed = BSS_CHANGED_ASSOC; 3859 unsigned int link_id; 3860 3861 lockdep_assert_wiphy(local->hw.wiphy); 3862 3863 sdata->u.mgd.associated = true; 3864 3865 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3866 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3867 struct ieee80211_link_data *link; 3868 3869 if (!cbss || 3870 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3871 continue; 3872 3873 if (ieee80211_vif_is_mld(&sdata->vif) && 3874 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3875 continue; 3876 3877 link = sdata_dereference(sdata->link[link_id], sdata); 3878 if (WARN_ON(!link)) 3879 return; 3880 3881 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3882 } 3883 3884 /* just to be sure */ 3885 ieee80211_stop_poll(sdata); 3886 3887 ieee80211_led_assoc(local, 1); 3888 3889 vif_cfg->assoc = 1; 3890 3891 /* Enable ARP filtering */ 3892 if (vif_cfg->arp_addr_cnt) 3893 vif_changed |= BSS_CHANGED_ARP_FILTER; 3894 3895 if (ieee80211_vif_is_mld(&sdata->vif)) { 3896 for (link_id = 0; 3897 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3898 link_id++) { 3899 struct ieee80211_link_data *link; 3900 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3901 3902 if (!cbss || 3903 !(BIT(link_id) & 3904 ieee80211_vif_usable_links(&sdata->vif)) || 3905 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3906 continue; 3907 3908 link = sdata_dereference(sdata->link[link_id], sdata); 3909 if (WARN_ON(!link)) 3910 return; 3911 3912 ieee80211_link_info_change_notify(sdata, link, 3913 changed[link_id]); 3914 3915 ieee80211_recalc_smps(sdata, link); 3916 } 3917 3918 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3919 } else { 3920 ieee80211_bss_info_change_notify(sdata, 3921 vif_changed | changed[0]); 3922 } 3923 3924 ieee80211_recalc_ps(local); 3925 3926 /* leave this here to not change ordering in non-MLO cases */ 3927 if (!ieee80211_vif_is_mld(&sdata->vif)) 3928 ieee80211_recalc_smps(sdata, &sdata->deflink); 3929 ieee80211_recalc_ps_vif(sdata); 3930 3931 netif_carrier_on(sdata->dev); 3932 } 3933 3934 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3935 { 3936 struct ieee80211_mgd_assoc_data *add_links_data = 3937 sdata->u.mgd.reconf.add_links_data; 3938 3939 if (!ieee80211_vif_is_mld(&sdata->vif) || 3940 !(sdata->u.mgd.reconf.added_links | 3941 sdata->u.mgd.reconf.removed_links)) 3942 return; 3943 3944 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3945 &sdata->u.mgd.reconf.wk); 3946 sdata->u.mgd.reconf.added_links = 0; 3947 sdata->u.mgd.reconf.removed_links = 0; 3948 sdata->u.mgd.reconf.dialog_token = 0; 3949 3950 if (add_links_data) { 3951 struct cfg80211_mlo_reconf_done_data done_data = {}; 3952 u8 link_id; 3953 3954 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3955 link_id++) 3956 done_data.links[link_id].bss = 3957 add_links_data->link[link_id].bss; 3958 3959 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 3960 3961 kfree(sdata->u.mgd.reconf.add_links_data); 3962 sdata->u.mgd.reconf.add_links_data = NULL; 3963 } 3964 } 3965 3966 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3967 u16 stype, u16 reason, bool tx, 3968 u8 *frame_buf) 3969 { 3970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3971 struct ieee80211_local *local = sdata->local; 3972 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3973 unsigned int link_id; 3974 u64 changed = 0; 3975 struct ieee80211_prep_tx_info info = { 3976 .subtype = stype, 3977 .was_assoc = true, 3978 .link_id = ffs(sdata->vif.active_links) - 1, 3979 }; 3980 3981 lockdep_assert_wiphy(local->hw.wiphy); 3982 3983 if (frame_buf) 3984 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 3985 3986 if (WARN_ON(!ap_sta)) 3987 return; 3988 3989 if (WARN_ON_ONCE(tx && !frame_buf)) 3990 return; 3991 3992 if (WARN_ON(!ifmgd->associated)) 3993 return; 3994 3995 ieee80211_stop_poll(sdata); 3996 3997 ifmgd->associated = false; 3998 3999 if (tx) { 4000 bool tx_link_found = false; 4001 4002 for (link_id = 0; 4003 link_id < ARRAY_SIZE(sdata->link); 4004 link_id++) { 4005 struct ieee80211_link_data *link; 4006 4007 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4008 continue; 4009 4010 link = sdata_dereference(sdata->link[link_id], sdata); 4011 if (WARN_ON_ONCE(!link)) 4012 continue; 4013 4014 if (link->u.mgd.csa.blocked_tx) 4015 continue; 4016 4017 tx_link_found = true; 4018 break; 4019 } 4020 4021 tx = tx_link_found; 4022 } 4023 4024 /* other links will be destroyed */ 4025 sdata->deflink.conf->bss = NULL; 4026 sdata->deflink.conf->epcs_support = false; 4027 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4028 4029 netif_carrier_off(sdata->dev); 4030 4031 /* 4032 * if we want to get out of ps before disassoc (why?) we have 4033 * to do it before sending disassoc, as otherwise the null-packet 4034 * won't be valid. 4035 */ 4036 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4037 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4038 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4039 } 4040 local->ps_sdata = NULL; 4041 4042 /* disable per-vif ps */ 4043 ieee80211_recalc_ps_vif(sdata); 4044 4045 /* make sure ongoing transmission finishes */ 4046 synchronize_net(); 4047 4048 /* 4049 * drop any frame before deauth/disassoc, this can be data or 4050 * management frame. Since we are disconnecting, we should not 4051 * insist sending these frames which can take time and delay 4052 * the disconnection and possible the roaming. 4053 */ 4054 ieee80211_flush_queues(local, sdata, true); 4055 4056 if (tx) { 4057 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4058 4059 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4060 sdata->vif.cfg.ap_addr, stype, 4061 reason, true, frame_buf); 4062 4063 /* flush out frame - make sure the deauth was actually sent */ 4064 ieee80211_flush_queues(local, sdata, false); 4065 4066 drv_mgd_complete_tx(sdata->local, sdata, &info); 4067 } else if (frame_buf) { 4068 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4069 sdata->vif.cfg.ap_addr, stype, 4070 reason, false, frame_buf); 4071 } 4072 4073 /* clear AP addr only after building the needed mgmt frames */ 4074 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4075 eth_zero_addr(sdata->vif.cfg.ap_addr); 4076 4077 sdata->vif.cfg.ssid_len = 0; 4078 4079 /* Remove TDLS peers */ 4080 __sta_info_flush(sdata, false, -1, ap_sta); 4081 4082 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4083 /* Only move the AP state */ 4084 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4085 } else { 4086 /* Remove AP peer */ 4087 sta_info_flush(sdata, -1); 4088 } 4089 4090 /* finally reset all BSS / config parameters */ 4091 if (!ieee80211_vif_is_mld(&sdata->vif)) 4092 changed |= ieee80211_reset_erp_info(sdata); 4093 4094 ieee80211_led_assoc(local, 0); 4095 changed |= BSS_CHANGED_ASSOC; 4096 sdata->vif.cfg.assoc = false; 4097 4098 sdata->deflink.u.mgd.p2p_noa_index = -1; 4099 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4100 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4101 4102 /* on the next assoc, re-program HT/VHT parameters */ 4103 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4104 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4105 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4106 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4107 4108 /* 4109 * reset MU-MIMO ownership and group data in default link, 4110 * if used, other links are destroyed 4111 */ 4112 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4113 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4114 memset(sdata->vif.bss_conf.mu_group.position, 0, 4115 sizeof(sdata->vif.bss_conf.mu_group.position)); 4116 if (!ieee80211_vif_is_mld(&sdata->vif)) 4117 changed |= BSS_CHANGED_MU_GROUPS; 4118 sdata->vif.bss_conf.mu_mimo_owner = false; 4119 4120 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4121 4122 timer_delete_sync(&local->dynamic_ps_timer); 4123 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4124 4125 /* Disable ARP filtering */ 4126 if (sdata->vif.cfg.arp_addr_cnt) 4127 changed |= BSS_CHANGED_ARP_FILTER; 4128 4129 sdata->vif.bss_conf.qos = false; 4130 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4131 changed |= BSS_CHANGED_QOS; 4132 /* The BSSID (not really interesting) and HT changed */ 4133 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4134 ieee80211_bss_info_change_notify(sdata, changed); 4135 } else { 4136 ieee80211_vif_cfg_change_notify(sdata, changed); 4137 } 4138 4139 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4140 /* 4141 * After notifying the driver about the disassoc, 4142 * remove the ap sta. 4143 */ 4144 sta_info_flush(sdata, -1); 4145 } 4146 4147 /* disassociated - set to defaults now */ 4148 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4149 4150 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4151 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4152 timer_delete_sync(&sdata->u.mgd.timer); 4153 4154 sdata->vif.bss_conf.dtim_period = 0; 4155 sdata->vif.bss_conf.beacon_rate = NULL; 4156 4157 sdata->deflink.u.mgd.have_beacon = false; 4158 sdata->deflink.u.mgd.tracking_signal_avg = false; 4159 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4160 4161 ifmgd->flags = 0; 4162 4163 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4164 struct ieee80211_link_data *link; 4165 4166 link = sdata_dereference(sdata->link[link_id], sdata); 4167 if (!link) 4168 continue; 4169 ieee80211_link_release_channel(link); 4170 } 4171 4172 sdata->vif.bss_conf.csa_active = false; 4173 sdata->deflink.u.mgd.csa.blocked_tx = false; 4174 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4175 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4176 ieee80211_vif_unblock_queues_csa(sdata); 4177 4178 /* existing TX TSPEC sessions no longer exist */ 4179 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4180 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4181 4182 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4183 sdata->vif.bss_conf.pwr_reduction = 0; 4184 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4185 4186 sdata->vif.cfg.eml_cap = 0; 4187 sdata->vif.cfg.eml_med_sync_delay = 0; 4188 sdata->vif.cfg.mld_capa_op = 0; 4189 4190 memset(&sdata->u.mgd.ttlm_info, 0, 4191 sizeof(sdata->u.mgd.ttlm_info)); 4192 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4193 4194 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4195 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4196 &ifmgd->neg_ttlm_timeout_work); 4197 4198 sdata->u.mgd.removed_links = 0; 4199 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4200 &sdata->u.mgd.ml_reconf_work); 4201 4202 wiphy_work_cancel(sdata->local->hw.wiphy, 4203 &ifmgd->teardown_ttlm_work); 4204 4205 /* if disconnection happens in the middle of the ML reconfiguration 4206 * flow, cfg80211 must called to release the BSS references obtained 4207 * when the flow started. 4208 */ 4209 ieee80211_ml_reconf_reset(sdata); 4210 4211 ieee80211_vif_set_links(sdata, 0, 0); 4212 4213 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4214 4215 ifmgd->epcs.enabled = false; 4216 ifmgd->epcs.dialog_token = 0; 4217 4218 memset(ifmgd->userspace_selectors, 0, 4219 sizeof(ifmgd->userspace_selectors)); 4220 } 4221 4222 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4223 { 4224 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4225 struct ieee80211_local *local = sdata->local; 4226 4227 lockdep_assert_wiphy(local->hw.wiphy); 4228 4229 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4230 return; 4231 4232 __ieee80211_stop_poll(sdata); 4233 4234 ieee80211_recalc_ps(local); 4235 4236 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4237 return; 4238 4239 /* 4240 * We've received a probe response, but are not sure whether 4241 * we have or will be receiving any beacons or data, so let's 4242 * schedule the timers again, just in case. 4243 */ 4244 ieee80211_sta_reset_beacon_monitor(sdata); 4245 4246 mod_timer(&ifmgd->conn_mon_timer, 4247 round_jiffies_up(jiffies + 4248 IEEE80211_CONNECTION_IDLE_TIME)); 4249 } 4250 4251 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4252 struct ieee80211_hdr *hdr, 4253 u16 tx_time) 4254 { 4255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4256 u16 tid; 4257 int ac; 4258 struct ieee80211_sta_tx_tspec *tx_tspec; 4259 unsigned long now = jiffies; 4260 4261 if (!ieee80211_is_data_qos(hdr->frame_control)) 4262 return; 4263 4264 tid = ieee80211_get_tid(hdr); 4265 ac = ieee80211_ac_from_tid(tid); 4266 tx_tspec = &ifmgd->tx_tspec[ac]; 4267 4268 if (likely(!tx_tspec->admitted_time)) 4269 return; 4270 4271 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4272 tx_tspec->consumed_tx_time = 0; 4273 tx_tspec->time_slice_start = now; 4274 4275 if (tx_tspec->downgraded) { 4276 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4277 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4278 &ifmgd->tx_tspec_wk, 0); 4279 } 4280 } 4281 4282 if (tx_tspec->downgraded) 4283 return; 4284 4285 tx_tspec->consumed_tx_time += tx_time; 4286 4287 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4288 tx_tspec->downgraded = true; 4289 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4290 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4291 &ifmgd->tx_tspec_wk, 0); 4292 } 4293 } 4294 4295 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4296 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4297 { 4298 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4299 4300 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4301 !sdata->u.mgd.probe_send_count) 4302 return; 4303 4304 if (ack) 4305 sdata->u.mgd.probe_send_count = 0; 4306 else 4307 sdata->u.mgd.nullfunc_failed = true; 4308 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4309 } 4310 4311 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4312 const u8 *src, const u8 *dst, 4313 const u8 *ssid, size_t ssid_len, 4314 struct ieee80211_channel *channel) 4315 { 4316 struct sk_buff *skb; 4317 4318 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4319 ssid, ssid_len, NULL, 0, 4320 IEEE80211_PROBE_FLAG_DIRECTED); 4321 if (skb) 4322 ieee80211_tx_skb(sdata, skb); 4323 } 4324 4325 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4326 { 4327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4328 u8 *dst = sdata->vif.cfg.ap_addr; 4329 u8 unicast_limit = max(1, max_probe_tries - 3); 4330 struct sta_info *sta; 4331 4332 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4333 4334 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 4335 return; 4336 4337 /* 4338 * Try sending broadcast probe requests for the last three 4339 * probe requests after the first ones failed since some 4340 * buggy APs only support broadcast probe requests. 4341 */ 4342 if (ifmgd->probe_send_count >= unicast_limit) 4343 dst = NULL; 4344 4345 /* 4346 * When the hardware reports an accurate Tx ACK status, it's 4347 * better to send a nullfunc frame instead of a probe request, 4348 * as it will kick us off the AP quickly if we aren't associated 4349 * anymore. The timeout will be reset if the frame is ACKed by 4350 * the AP. 4351 */ 4352 ifmgd->probe_send_count++; 4353 4354 if (dst) { 4355 sta = sta_info_get(sdata, dst); 4356 if (!WARN_ON(!sta)) 4357 ieee80211_check_fast_rx(sta); 4358 } 4359 4360 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4361 ifmgd->nullfunc_failed = false; 4362 ieee80211_send_nullfunc(sdata->local, sdata, false); 4363 } else { 4364 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4365 sdata->vif.cfg.ssid, 4366 sdata->vif.cfg.ssid_len, 4367 sdata->deflink.conf->bss->channel); 4368 } 4369 4370 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4371 run_again(sdata, ifmgd->probe_timeout); 4372 } 4373 4374 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4375 bool beacon) 4376 { 4377 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4378 bool already = false; 4379 4380 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4381 4382 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 4383 return; 4384 4385 if (!ieee80211_sdata_running(sdata)) 4386 return; 4387 4388 if (!ifmgd->associated) 4389 return; 4390 4391 if (sdata->local->tmp_channel || sdata->local->scanning) 4392 return; 4393 4394 if (sdata->local->suspending) { 4395 /* reschedule after resume */ 4396 ieee80211_reset_ap_probe(sdata); 4397 return; 4398 } 4399 4400 if (beacon) { 4401 mlme_dbg_ratelimited(sdata, 4402 "detected beacon loss from AP (missed %d beacons) - probing\n", 4403 beacon_loss_count); 4404 4405 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4406 } 4407 4408 /* 4409 * The driver/our work has already reported this event or the 4410 * connection monitoring has kicked in and we have already sent 4411 * a probe request. Or maybe the AP died and the driver keeps 4412 * reporting until we disassociate... 4413 * 4414 * In either case we have to ignore the current call to this 4415 * function (except for setting the correct probe reason bit) 4416 * because otherwise we would reset the timer every time and 4417 * never check whether we received a probe response! 4418 */ 4419 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4420 already = true; 4421 4422 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4423 4424 if (already) 4425 return; 4426 4427 ieee80211_recalc_ps(sdata->local); 4428 4429 ifmgd->probe_send_count = 0; 4430 ieee80211_mgd_probe_ap_send(sdata); 4431 } 4432 4433 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4434 struct ieee80211_vif *vif) 4435 { 4436 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4437 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4438 struct cfg80211_bss *cbss; 4439 struct sk_buff *skb; 4440 const struct element *ssid; 4441 int ssid_len; 4442 4443 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4444 4445 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4446 ieee80211_vif_is_mld(&sdata->vif))) 4447 return NULL; 4448 4449 if (ifmgd->associated) 4450 cbss = sdata->deflink.conf->bss; 4451 else if (ifmgd->auth_data) 4452 cbss = ifmgd->auth_data->bss; 4453 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4454 cbss = ifmgd->assoc_data->link[0].bss; 4455 else 4456 return NULL; 4457 4458 rcu_read_lock(); 4459 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4460 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4461 "invalid SSID element (len=%d)", 4462 ssid ? ssid->datalen : -1)) 4463 ssid_len = 0; 4464 else 4465 ssid_len = ssid->datalen; 4466 4467 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4468 (u32) -1, cbss->channel, 4469 ssid->data, ssid_len, 4470 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4471 rcu_read_unlock(); 4472 4473 return skb; 4474 } 4475 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4476 4477 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4478 const u8 *buf, size_t len, bool tx, 4479 u16 reason, bool reconnect) 4480 { 4481 struct ieee80211_event event = { 4482 .type = MLME_EVENT, 4483 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4484 .u.mlme.reason = reason, 4485 }; 4486 4487 if (tx) 4488 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4489 else 4490 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4491 4492 drv_event_callback(sdata->local, sdata, &event); 4493 } 4494 4495 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4496 { 4497 struct ieee80211_local *local = sdata->local; 4498 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4499 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4500 4501 lockdep_assert_wiphy(local->hw.wiphy); 4502 4503 if (!ifmgd->associated) 4504 return; 4505 4506 if (!ifmgd->driver_disconnect) { 4507 unsigned int link_id; 4508 4509 /* 4510 * AP is probably out of range (or not reachable for another 4511 * reason) so remove the bss structs for that AP. In the case 4512 * of multi-link, it's not clear that all of them really are 4513 * out of range, but if they weren't the driver likely would 4514 * have switched to just have a single link active? 4515 */ 4516 for (link_id = 0; 4517 link_id < ARRAY_SIZE(sdata->link); 4518 link_id++) { 4519 struct ieee80211_link_data *link; 4520 4521 link = sdata_dereference(sdata->link[link_id], sdata); 4522 if (!link || !link->conf->bss) 4523 continue; 4524 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4525 link->conf->bss = NULL; 4526 } 4527 } 4528 4529 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4530 ifmgd->driver_disconnect ? 4531 WLAN_REASON_DEAUTH_LEAVING : 4532 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4533 true, frame_buf); 4534 /* the other links will be destroyed */ 4535 sdata->vif.bss_conf.csa_active = false; 4536 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4537 sdata->deflink.u.mgd.csa.blocked_tx = false; 4538 ieee80211_vif_unblock_queues_csa(sdata); 4539 4540 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4541 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4542 ifmgd->reconnect); 4543 ifmgd->reconnect = false; 4544 } 4545 4546 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4547 struct wiphy_work *work) 4548 { 4549 struct ieee80211_sub_if_data *sdata = 4550 container_of(work, struct ieee80211_sub_if_data, 4551 u.mgd.beacon_connection_loss_work); 4552 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4553 4554 if (ifmgd->connection_loss) { 4555 sdata_info(sdata, "Connection to AP %pM lost\n", 4556 sdata->vif.cfg.ap_addr); 4557 __ieee80211_disconnect(sdata); 4558 ifmgd->connection_loss = false; 4559 } else if (ifmgd->driver_disconnect) { 4560 sdata_info(sdata, 4561 "Driver requested disconnection from AP %pM\n", 4562 sdata->vif.cfg.ap_addr); 4563 __ieee80211_disconnect(sdata); 4564 ifmgd->driver_disconnect = false; 4565 } else { 4566 if (ifmgd->associated) 4567 sdata->deflink.u.mgd.beacon_loss_count++; 4568 ieee80211_mgd_probe_ap(sdata, true); 4569 } 4570 } 4571 4572 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4573 struct wiphy_work *work) 4574 { 4575 struct ieee80211_sub_if_data *sdata = 4576 container_of(work, struct ieee80211_sub_if_data, 4577 u.mgd.csa_connection_drop_work); 4578 4579 __ieee80211_disconnect(sdata); 4580 } 4581 4582 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4583 { 4584 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4585 struct ieee80211_hw *hw = &sdata->local->hw; 4586 4587 trace_api_beacon_loss(sdata); 4588 4589 sdata->u.mgd.connection_loss = false; 4590 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4591 } 4592 EXPORT_SYMBOL(ieee80211_beacon_loss); 4593 4594 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4595 { 4596 struct ieee80211_sub_if_data *sdata; 4597 struct ieee80211_hw *hw; 4598 4599 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4600 4601 sdata = vif_to_sdata(vif); 4602 hw = &sdata->local->hw; 4603 4604 trace_api_connection_loss(sdata); 4605 4606 sdata->u.mgd.connection_loss = true; 4607 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4608 } 4609 EXPORT_SYMBOL(ieee80211_connection_loss); 4610 4611 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4612 { 4613 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4614 struct ieee80211_hw *hw = &sdata->local->hw; 4615 4616 trace_api_disconnect(sdata, reconnect); 4617 4618 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4619 return; 4620 4621 sdata->u.mgd.driver_disconnect = true; 4622 sdata->u.mgd.reconnect = reconnect; 4623 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4624 } 4625 EXPORT_SYMBOL(ieee80211_disconnect); 4626 4627 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4628 bool assoc) 4629 { 4630 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4631 4632 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4633 4634 sdata->u.mgd.auth_data = NULL; 4635 4636 if (!assoc) { 4637 /* 4638 * we are not authenticated yet, the only timer that could be 4639 * running is the timeout for the authentication response which 4640 * which is not relevant anymore. 4641 */ 4642 timer_delete_sync(&sdata->u.mgd.timer); 4643 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4644 4645 /* other links are destroyed */ 4646 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4647 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4648 BSS_CHANGED_BSSID); 4649 sdata->u.mgd.flags = 0; 4650 4651 ieee80211_link_release_channel(&sdata->deflink); 4652 ieee80211_vif_set_links(sdata, 0, 0); 4653 } 4654 4655 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4656 kfree(auth_data); 4657 } 4658 4659 enum assoc_status { 4660 ASSOC_SUCCESS, 4661 ASSOC_REJECTED, 4662 ASSOC_TIMEOUT, 4663 ASSOC_ABANDON, 4664 }; 4665 4666 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4667 enum assoc_status status) 4668 { 4669 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4670 4671 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4672 4673 sdata->u.mgd.assoc_data = NULL; 4674 4675 if (status != ASSOC_SUCCESS) { 4676 /* 4677 * we are not associated yet, the only timer that could be 4678 * running is the timeout for the association response which 4679 * which is not relevant anymore. 4680 */ 4681 timer_delete_sync(&sdata->u.mgd.timer); 4682 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4683 4684 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4685 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4686 BSS_CHANGED_BSSID); 4687 sdata->u.mgd.flags = 0; 4688 sdata->vif.bss_conf.mu_mimo_owner = false; 4689 4690 if (status != ASSOC_REJECTED) { 4691 struct cfg80211_assoc_failure data = { 4692 .timeout = status == ASSOC_TIMEOUT, 4693 }; 4694 int i; 4695 4696 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4697 ARRAY_SIZE(assoc_data->link)); 4698 4699 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4700 data.bss[i] = assoc_data->link[i].bss; 4701 4702 if (ieee80211_vif_is_mld(&sdata->vif)) 4703 data.ap_mld_addr = assoc_data->ap_addr; 4704 4705 cfg80211_assoc_failure(sdata->dev, &data); 4706 } 4707 4708 ieee80211_link_release_channel(&sdata->deflink); 4709 ieee80211_vif_set_links(sdata, 0, 0); 4710 } 4711 4712 kfree(assoc_data); 4713 } 4714 4715 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4716 struct ieee80211_mgmt *mgmt, size_t len) 4717 { 4718 struct ieee80211_local *local = sdata->local; 4719 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4720 const struct element *challenge; 4721 u8 *pos; 4722 u32 tx_flags = 0; 4723 struct ieee80211_prep_tx_info info = { 4724 .subtype = IEEE80211_STYPE_AUTH, 4725 .link_id = auth_data->link_id, 4726 }; 4727 4728 pos = mgmt->u.auth.variable; 4729 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4730 len - (pos - (u8 *)mgmt)); 4731 if (!challenge) 4732 return; 4733 auth_data->expected_transaction = 4; 4734 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4735 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4736 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4737 IEEE80211_TX_INTFL_MLME_CONN_TX; 4738 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4739 (void *)challenge, 4740 challenge->datalen + sizeof(*challenge), 4741 auth_data->ap_addr, auth_data->ap_addr, 4742 auth_data->key, auth_data->key_len, 4743 auth_data->key_idx, tx_flags); 4744 } 4745 4746 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4747 { 4748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4749 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4750 struct sta_info *sta; 4751 4752 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4753 4754 sdata_info(sdata, "authenticated\n"); 4755 ifmgd->auth_data->done = true; 4756 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4757 ifmgd->auth_data->timeout_started = true; 4758 run_again(sdata, ifmgd->auth_data->timeout); 4759 4760 /* move station state to auth */ 4761 sta = sta_info_get(sdata, ap_addr); 4762 if (!sta) { 4763 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4764 return false; 4765 } 4766 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4767 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4768 return false; 4769 } 4770 4771 return true; 4772 } 4773 4774 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4775 struct ieee80211_mgmt *mgmt, size_t len) 4776 { 4777 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4778 u16 auth_alg, auth_transaction, status_code; 4779 struct ieee80211_event event = { 4780 .type = MLME_EVENT, 4781 .u.mlme.data = AUTH_EVENT, 4782 }; 4783 struct ieee80211_prep_tx_info info = { 4784 .subtype = IEEE80211_STYPE_AUTH, 4785 }; 4786 bool sae_need_confirm = false; 4787 4788 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4789 4790 if (len < 24 + 6) 4791 return; 4792 4793 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4794 return; 4795 4796 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4797 return; 4798 4799 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4800 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4801 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4802 4803 info.link_id = ifmgd->auth_data->link_id; 4804 4805 if (auth_alg != ifmgd->auth_data->algorithm || 4806 (auth_alg != WLAN_AUTH_SAE && 4807 auth_transaction != ifmgd->auth_data->expected_transaction) || 4808 (auth_alg == WLAN_AUTH_SAE && 4809 (auth_transaction < ifmgd->auth_data->expected_transaction || 4810 auth_transaction > 2))) { 4811 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4812 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4813 auth_transaction, 4814 ifmgd->auth_data->expected_transaction); 4815 goto notify_driver; 4816 } 4817 4818 if (status_code != WLAN_STATUS_SUCCESS) { 4819 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4820 4821 if (auth_alg == WLAN_AUTH_SAE && 4822 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4823 (auth_transaction == 1 && 4824 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4825 status_code == WLAN_STATUS_SAE_PK)))) { 4826 /* waiting for userspace now */ 4827 ifmgd->auth_data->waiting = true; 4828 ifmgd->auth_data->timeout = 4829 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4830 ifmgd->auth_data->timeout_started = true; 4831 run_again(sdata, ifmgd->auth_data->timeout); 4832 if (auth_transaction == 1) 4833 sae_need_confirm = true; 4834 goto notify_driver; 4835 } 4836 4837 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4838 mgmt->sa, status_code); 4839 ieee80211_destroy_auth_data(sdata, false); 4840 event.u.mlme.status = MLME_DENIED; 4841 event.u.mlme.reason = status_code; 4842 drv_event_callback(sdata->local, sdata, &event); 4843 goto notify_driver; 4844 } 4845 4846 switch (ifmgd->auth_data->algorithm) { 4847 case WLAN_AUTH_OPEN: 4848 case WLAN_AUTH_LEAP: 4849 case WLAN_AUTH_FT: 4850 case WLAN_AUTH_SAE: 4851 case WLAN_AUTH_FILS_SK: 4852 case WLAN_AUTH_FILS_SK_PFS: 4853 case WLAN_AUTH_FILS_PK: 4854 break; 4855 case WLAN_AUTH_SHARED_KEY: 4856 if (ifmgd->auth_data->expected_transaction != 4) { 4857 ieee80211_auth_challenge(sdata, mgmt, len); 4858 /* need another frame */ 4859 return; 4860 } 4861 break; 4862 default: 4863 WARN_ONCE(1, "invalid auth alg %d", 4864 ifmgd->auth_data->algorithm); 4865 goto notify_driver; 4866 } 4867 4868 event.u.mlme.status = MLME_SUCCESS; 4869 info.success = 1; 4870 drv_event_callback(sdata->local, sdata, &event); 4871 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4872 (auth_transaction == 2 && 4873 ifmgd->auth_data->expected_transaction == 2)) { 4874 if (!ieee80211_mark_sta_auth(sdata)) 4875 return; /* ignore frame -- wait for timeout */ 4876 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4877 auth_transaction == 1) { 4878 sae_need_confirm = true; 4879 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4880 auth_transaction == 2) { 4881 sdata_info(sdata, "SAE peer confirmed\n"); 4882 ifmgd->auth_data->peer_confirmed = true; 4883 } 4884 4885 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4886 notify_driver: 4887 if (!sae_need_confirm) 4888 drv_mgd_complete_tx(sdata->local, sdata, &info); 4889 } 4890 4891 #define case_WLAN(type) \ 4892 case WLAN_REASON_##type: return #type 4893 4894 const char *ieee80211_get_reason_code_string(u16 reason_code) 4895 { 4896 switch (reason_code) { 4897 case_WLAN(UNSPECIFIED); 4898 case_WLAN(PREV_AUTH_NOT_VALID); 4899 case_WLAN(DEAUTH_LEAVING); 4900 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4901 case_WLAN(DISASSOC_AP_BUSY); 4902 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4903 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4904 case_WLAN(DISASSOC_STA_HAS_LEFT); 4905 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4906 case_WLAN(DISASSOC_BAD_POWER); 4907 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4908 case_WLAN(INVALID_IE); 4909 case_WLAN(MIC_FAILURE); 4910 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4911 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4912 case_WLAN(IE_DIFFERENT); 4913 case_WLAN(INVALID_GROUP_CIPHER); 4914 case_WLAN(INVALID_PAIRWISE_CIPHER); 4915 case_WLAN(INVALID_AKMP); 4916 case_WLAN(UNSUPP_RSN_VERSION); 4917 case_WLAN(INVALID_RSN_IE_CAP); 4918 case_WLAN(IEEE8021X_FAILED); 4919 case_WLAN(CIPHER_SUITE_REJECTED); 4920 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4921 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4922 case_WLAN(DISASSOC_LOW_ACK); 4923 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4924 case_WLAN(QSTA_LEAVE_QBSS); 4925 case_WLAN(QSTA_NOT_USE); 4926 case_WLAN(QSTA_REQUIRE_SETUP); 4927 case_WLAN(QSTA_TIMEOUT); 4928 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4929 case_WLAN(MESH_PEER_CANCELED); 4930 case_WLAN(MESH_MAX_PEERS); 4931 case_WLAN(MESH_CONFIG); 4932 case_WLAN(MESH_CLOSE); 4933 case_WLAN(MESH_MAX_RETRIES); 4934 case_WLAN(MESH_CONFIRM_TIMEOUT); 4935 case_WLAN(MESH_INVALID_GTK); 4936 case_WLAN(MESH_INCONSISTENT_PARAM); 4937 case_WLAN(MESH_INVALID_SECURITY); 4938 case_WLAN(MESH_PATH_ERROR); 4939 case_WLAN(MESH_PATH_NOFORWARD); 4940 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4941 case_WLAN(MAC_EXISTS_IN_MBSS); 4942 case_WLAN(MESH_CHAN_REGULATORY); 4943 case_WLAN(MESH_CHAN); 4944 default: return "<unknown>"; 4945 } 4946 } 4947 4948 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4949 struct ieee80211_mgmt *mgmt, size_t len) 4950 { 4951 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4952 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4953 4954 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4955 4956 if (len < 24 + 2) 4957 return; 4958 4959 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4960 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4961 return; 4962 } 4963 4964 if (ifmgd->associated && 4965 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4966 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4967 sdata->vif.cfg.ap_addr, reason_code, 4968 ieee80211_get_reason_code_string(reason_code)); 4969 4970 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4971 4972 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4973 reason_code, false); 4974 return; 4975 } 4976 4977 if (ifmgd->assoc_data && 4978 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4979 sdata_info(sdata, 4980 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4981 ifmgd->assoc_data->ap_addr, reason_code, 4982 ieee80211_get_reason_code_string(reason_code)); 4983 4984 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4985 4986 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4987 return; 4988 } 4989 } 4990 4991 4992 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4993 struct ieee80211_mgmt *mgmt, size_t len) 4994 { 4995 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4996 u16 reason_code; 4997 4998 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4999 5000 if (len < 24 + 2) 5001 return; 5002 5003 if (!ifmgd->associated || 5004 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5005 return; 5006 5007 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5008 5009 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5010 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5011 return; 5012 } 5013 5014 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5015 sdata->vif.cfg.ap_addr, reason_code, 5016 ieee80211_get_reason_code_string(reason_code)); 5017 5018 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5019 5020 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5021 false); 5022 } 5023 5024 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5025 struct ieee80211_supported_band *sband, 5026 const struct link_sta_info *link_sta, 5027 const struct ieee802_11_elems *elems) 5028 { 5029 const struct ieee80211_sta_he_cap *own_he_cap = 5030 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5031 5032 if (elems->ext_capab_len < 10) 5033 return false; 5034 5035 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5036 return false; 5037 5038 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5039 IEEE80211_HE_MAC_CAP0_TWT_RES && 5040 own_he_cap && 5041 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5042 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5043 } 5044 5045 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5046 struct ieee80211_supported_band *sband, 5047 struct ieee80211_link_data *link, 5048 struct link_sta_info *link_sta, 5049 struct ieee802_11_elems *elems) 5050 { 5051 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5052 5053 if (link->conf->twt_requester != twt) { 5054 link->conf->twt_requester = twt; 5055 return BSS_CHANGED_TWT; 5056 } 5057 return 0; 5058 } 5059 5060 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5061 struct ieee80211_bss_conf *bss_conf, 5062 struct ieee80211_supported_band *sband, 5063 struct link_sta_info *link_sta) 5064 { 5065 const struct ieee80211_sta_he_cap *own_he_cap = 5066 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5067 5068 return bss_conf->he_support && 5069 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5070 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5071 own_he_cap && 5072 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5073 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5074 } 5075 5076 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5077 bool enabled) 5078 { 5079 /* in any case this is called, dialog token should be reset */ 5080 sdata->u.mgd.epcs.dialog_token = 0; 5081 5082 if (sdata->u.mgd.epcs.enabled == enabled) 5083 return; 5084 5085 sdata->u.mgd.epcs.enabled = enabled; 5086 cfg80211_epcs_changed(sdata->dev, enabled); 5087 } 5088 5089 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5090 { 5091 struct ieee80211_local *local = sdata->local; 5092 u8 link_id; 5093 5094 if (!sdata->u.mgd.epcs.enabled) 5095 return; 5096 5097 lockdep_assert_wiphy(local->hw.wiphy); 5098 5099 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5100 struct ieee802_11_elems *elems; 5101 struct ieee80211_link_data *link; 5102 const struct cfg80211_bss_ies *ies; 5103 bool ret; 5104 5105 rcu_read_lock(); 5106 5107 link = sdata_dereference(sdata->link[link_id], sdata); 5108 if (!link || !link->conf || !link->conf->bss) { 5109 rcu_read_unlock(); 5110 continue; 5111 } 5112 5113 if (link->u.mgd.disable_wmm_tracking) { 5114 rcu_read_unlock(); 5115 ieee80211_set_wmm_default(link, false, false); 5116 continue; 5117 } 5118 5119 ies = rcu_dereference(link->conf->bss->beacon_ies); 5120 if (!ies) { 5121 rcu_read_unlock(); 5122 ieee80211_set_wmm_default(link, false, false); 5123 continue; 5124 } 5125 5126 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5127 NULL); 5128 if (!elems) { 5129 rcu_read_unlock(); 5130 ieee80211_set_wmm_default(link, false, false); 5131 continue; 5132 } 5133 5134 ret = _ieee80211_sta_wmm_params(local, link, 5135 elems->wmm_param, 5136 elems->wmm_param_len, 5137 elems->mu_edca_param_set); 5138 5139 kfree(elems); 5140 rcu_read_unlock(); 5141 5142 if (!ret) { 5143 ieee80211_set_wmm_default(link, false, false); 5144 continue; 5145 } 5146 5147 ieee80211_mgd_set_link_qos_params(link); 5148 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5149 } 5150 } 5151 5152 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5153 struct link_sta_info *link_sta, 5154 struct cfg80211_bss *cbss, 5155 struct ieee80211_mgmt *mgmt, 5156 const u8 *elem_start, 5157 unsigned int elem_len, 5158 u64 *changed) 5159 { 5160 struct ieee80211_sub_if_data *sdata = link->sdata; 5161 struct ieee80211_mgd_assoc_data *assoc_data = 5162 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5163 struct ieee80211_bss_conf *bss_conf = link->conf; 5164 struct ieee80211_local *local = sdata->local; 5165 unsigned int link_id = link->link_id; 5166 struct ieee80211_elems_parse_params parse_params = { 5167 .mode = link->u.mgd.conn.mode, 5168 .start = elem_start, 5169 .len = elem_len, 5170 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5171 .from_ap = true, 5172 }; 5173 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5174 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5175 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5176 const struct cfg80211_bss_ies *bss_ies = NULL; 5177 struct ieee80211_supported_band *sband; 5178 struct ieee802_11_elems *elems; 5179 const __le16 prof_bss_param_ch_present = 5180 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5181 u16 capab_info; 5182 bool ret; 5183 5184 elems = ieee802_11_parse_elems_full(&parse_params); 5185 if (!elems) 5186 return false; 5187 5188 if (link_id == assoc_data->assoc_link_id) { 5189 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5190 5191 /* 5192 * we should not get to this flow unless the association was 5193 * successful, so set the status directly to success 5194 */ 5195 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5196 if (elems->ml_basic) { 5197 int bss_param_ch_cnt = 5198 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5199 5200 if (bss_param_ch_cnt < 0) { 5201 ret = false; 5202 goto out; 5203 } 5204 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5205 bss_conf->bss_param_ch_cnt_link_id = link_id; 5206 } 5207 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5208 !elems->prof || 5209 !(elems->prof->control & prof_bss_param_ch_present)) { 5210 ret = false; 5211 goto out; 5212 } else { 5213 const u8 *ptr = elems->prof->variable + 5214 elems->prof->sta_info_len - 1; 5215 int bss_param_ch_cnt; 5216 5217 /* 5218 * During parsing, we validated that these fields exist, 5219 * otherwise elems->prof would have been set to NULL. 5220 */ 5221 capab_info = get_unaligned_le16(ptr); 5222 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5223 bss_param_ch_cnt = 5224 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5225 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5226 bss_conf->bss_param_ch_cnt_link_id = link_id; 5227 5228 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5229 link_info(link, "association response status code=%u\n", 5230 assoc_data->link[link_id].status); 5231 ret = true; 5232 goto out; 5233 } 5234 } 5235 5236 if (!is_s1g && !elems->supp_rates) { 5237 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5238 ret = false; 5239 goto out; 5240 } 5241 5242 link->u.mgd.tdls_chan_switch_prohibited = 5243 elems->ext_capab && elems->ext_capab_len >= 5 && 5244 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5245 5246 /* 5247 * Some APs are erroneously not including some information in their 5248 * (re)association response frames. Try to recover by using the data 5249 * from the beacon or probe response. This seems to afflict mobile 5250 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5251 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5252 */ 5253 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5254 ((assoc_data->wmm && !elems->wmm_param) || 5255 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5256 (!elems->ht_cap_elem || !elems->ht_operation)) || 5257 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5258 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5259 const struct cfg80211_bss_ies *ies; 5260 struct ieee802_11_elems *bss_elems; 5261 5262 rcu_read_lock(); 5263 ies = rcu_dereference(cbss->ies); 5264 if (ies) 5265 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5266 GFP_ATOMIC); 5267 rcu_read_unlock(); 5268 if (!bss_ies) { 5269 ret = false; 5270 goto out; 5271 } 5272 5273 parse_params.start = bss_ies->data; 5274 parse_params.len = bss_ies->len; 5275 parse_params.bss = cbss; 5276 parse_params.link_id = -1; 5277 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5278 if (!bss_elems) { 5279 ret = false; 5280 goto out; 5281 } 5282 5283 if (assoc_data->wmm && 5284 !elems->wmm_param && bss_elems->wmm_param) { 5285 elems->wmm_param = bss_elems->wmm_param; 5286 sdata_info(sdata, 5287 "AP bug: WMM param missing from AssocResp\n"); 5288 } 5289 5290 /* 5291 * Also check if we requested HT/VHT, otherwise the AP doesn't 5292 * have to include the IEs in the (re)association response. 5293 */ 5294 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5295 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5296 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5297 sdata_info(sdata, 5298 "AP bug: HT capability missing from AssocResp\n"); 5299 } 5300 if (!elems->ht_operation && bss_elems->ht_operation && 5301 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5302 elems->ht_operation = bss_elems->ht_operation; 5303 sdata_info(sdata, 5304 "AP bug: HT operation missing from AssocResp\n"); 5305 } 5306 5307 if (is_5ghz) { 5308 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5309 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5310 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5311 sdata_info(sdata, 5312 "AP bug: VHT capa missing from AssocResp\n"); 5313 } 5314 5315 if (!elems->vht_operation && bss_elems->vht_operation && 5316 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5317 elems->vht_operation = bss_elems->vht_operation; 5318 sdata_info(sdata, 5319 "AP bug: VHT operation missing from AssocResp\n"); 5320 } 5321 } 5322 kfree(bss_elems); 5323 } 5324 5325 /* 5326 * We previously checked these in the beacon/probe response, so 5327 * they should be present here. This is just a safety net. 5328 * Note that the ieee80211_config_bw() below would also check 5329 * for this (and more), but this has better error reporting. 5330 */ 5331 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5332 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5333 sdata_info(sdata, 5334 "HT AP is missing WMM params or HT capability/operation\n"); 5335 ret = false; 5336 goto out; 5337 } 5338 5339 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5340 (!elems->vht_cap_elem || !elems->vht_operation)) { 5341 sdata_info(sdata, 5342 "VHT AP is missing VHT capability/operation\n"); 5343 ret = false; 5344 goto out; 5345 } 5346 5347 /* check/update if AP changed anything in assoc response vs. scan */ 5348 if (ieee80211_config_bw(link, elems, 5349 link_id == assoc_data->assoc_link_id, 5350 changed, "assoc response")) { 5351 ret = false; 5352 goto out; 5353 } 5354 5355 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5356 ret = false; 5357 goto out; 5358 } 5359 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5360 5361 /* Set up internal HT/VHT capabilities */ 5362 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5363 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5364 elems->ht_cap_elem, 5365 link_sta); 5366 5367 if (elems->vht_cap_elem && 5368 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5369 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5370 const struct cfg80211_bss_ies *ies; 5371 5372 /* 5373 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5374 * too large maximum MPDU length in the association response 5375 * (indicating 12k) that it cannot actually process ... 5376 * Work around that. 5377 */ 5378 rcu_read_lock(); 5379 ies = rcu_dereference(cbss->ies); 5380 if (ies) { 5381 const struct element *elem; 5382 5383 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5384 ies->data, ies->len); 5385 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5386 bss_vht_cap = (const void *)elem->data; 5387 } 5388 5389 if (ieee80211_hw_check(&local->hw, STRICT) && 5390 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5391 sizeof(*bss_vht_cap)))) { 5392 rcu_read_unlock(); 5393 ret = false; 5394 link_info(link, "VHT capabilities mismatch\n"); 5395 goto out; 5396 } 5397 5398 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5399 elems->vht_cap_elem, 5400 bss_vht_cap, link_sta); 5401 rcu_read_unlock(); 5402 } 5403 5404 if (elems->he_operation && 5405 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5406 elems->he_cap) { 5407 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5408 elems->he_cap, 5409 elems->he_cap_len, 5410 elems->he_6ghz_capa, 5411 link_sta); 5412 5413 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5414 if (elems->rsnx && elems->rsnx_len && 5415 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5416 wiphy_ext_feature_isset(local->hw.wiphy, 5417 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5418 bss_conf->twt_protected = true; 5419 else 5420 bss_conf->twt_protected = false; 5421 5422 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5423 link_sta, elems); 5424 5425 if (elems->eht_operation && elems->eht_cap && 5426 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5427 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5428 elems->he_cap, 5429 elems->he_cap_len, 5430 elems->eht_cap, 5431 elems->eht_cap_len, 5432 link_sta); 5433 5434 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5435 bss_conf->epcs_support = bss_conf->eht_support && 5436 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5437 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5438 5439 /* EPCS might be already enabled but a new added link 5440 * does not support EPCS. This should not really happen 5441 * in practice. 5442 */ 5443 if (sdata->u.mgd.epcs.enabled && 5444 !bss_conf->epcs_support) 5445 ieee80211_epcs_teardown(sdata); 5446 } else { 5447 bss_conf->eht_support = false; 5448 bss_conf->epcs_support = false; 5449 } 5450 } else { 5451 bss_conf->he_support = false; 5452 bss_conf->twt_requester = false; 5453 bss_conf->twt_protected = false; 5454 bss_conf->eht_support = false; 5455 bss_conf->epcs_support = false; 5456 } 5457 5458 if (elems->s1g_oper && 5459 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5460 elems->s1g_capab) 5461 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5462 link_sta); 5463 5464 bss_conf->twt_broadcast = 5465 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5466 5467 if (bss_conf->he_support) { 5468 bss_conf->he_bss_color.color = 5469 le32_get_bits(elems->he_operation->he_oper_params, 5470 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5471 bss_conf->he_bss_color.partial = 5472 le32_get_bits(elems->he_operation->he_oper_params, 5473 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5474 bss_conf->he_bss_color.enabled = 5475 !le32_get_bits(elems->he_operation->he_oper_params, 5476 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5477 5478 if (bss_conf->he_bss_color.enabled) 5479 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5480 5481 bss_conf->htc_trig_based_pkt_ext = 5482 le32_get_bits(elems->he_operation->he_oper_params, 5483 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5484 bss_conf->frame_time_rts_th = 5485 le32_get_bits(elems->he_operation->he_oper_params, 5486 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5487 5488 bss_conf->uora_exists = !!elems->uora_element; 5489 if (elems->uora_element) 5490 bss_conf->uora_ocw_range = elems->uora_element[0]; 5491 5492 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5493 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5494 /* TODO: OPEN: what happens if BSS color disable is set? */ 5495 } 5496 5497 if (cbss->transmitted_bss) { 5498 bss_conf->nontransmitted = true; 5499 ether_addr_copy(bss_conf->transmitter_bssid, 5500 cbss->transmitted_bss->bssid); 5501 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5502 bss_conf->bssid_index = cbss->bssid_index; 5503 } 5504 5505 /* 5506 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5507 * in their association response, so ignore that data for our own 5508 * configuration. If it changed since the last beacon, we'll get the 5509 * next beacon and update then. 5510 */ 5511 5512 /* 5513 * If an operating mode notification IE is present, override the 5514 * NSS calculation (that would be done in rate_control_rate_init()) 5515 * and use the # of streams from that element. 5516 */ 5517 if (elems->opmode_notif && 5518 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5519 u8 nss; 5520 5521 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5522 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5523 nss += 1; 5524 link_sta->pub->rx_nss = nss; 5525 } 5526 5527 /* 5528 * Always handle WMM once after association regardless 5529 * of the first value the AP uses. Setting -1 here has 5530 * that effect because the AP values is an unsigned 5531 * 4-bit value. 5532 */ 5533 link->u.mgd.wmm_last_param_set = -1; 5534 link->u.mgd.mu_edca_last_param_set = -1; 5535 5536 if (link->u.mgd.disable_wmm_tracking) { 5537 ieee80211_set_wmm_default(link, false, false); 5538 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5539 elems->wmm_param_len, 5540 elems->mu_edca_param_set)) { 5541 /* still enable QoS since we might have HT/VHT */ 5542 ieee80211_set_wmm_default(link, false, true); 5543 /* disable WMM tracking in this case to disable 5544 * tracking WMM parameter changes in the beacon if 5545 * the parameters weren't actually valid. Doing so 5546 * avoids changing parameters very strangely when 5547 * the AP is going back and forth between valid and 5548 * invalid parameters. 5549 */ 5550 link->u.mgd.disable_wmm_tracking = true; 5551 } 5552 5553 if (elems->max_idle_period_ie) { 5554 bss_conf->max_idle_period = 5555 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5556 bss_conf->protected_keep_alive = 5557 !!(elems->max_idle_period_ie->idle_options & 5558 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5559 *changed |= BSS_CHANGED_KEEP_ALIVE; 5560 } else { 5561 bss_conf->max_idle_period = 0; 5562 bss_conf->protected_keep_alive = false; 5563 } 5564 5565 /* set assoc capability (AID was already set earlier), 5566 * ieee80211_set_associated() will tell the driver */ 5567 bss_conf->assoc_capability = capab_info; 5568 5569 ret = true; 5570 out: 5571 kfree(elems); 5572 kfree(bss_ies); 5573 return ret; 5574 } 5575 5576 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5577 struct sta_info *sta, 5578 struct link_sta_info *link_sta, 5579 struct cfg80211_bss *cbss) 5580 { 5581 struct ieee80211_sub_if_data *sdata = link->sdata; 5582 struct ieee80211_local *local = sdata->local; 5583 struct ieee80211_bss *bss = (void *)cbss->priv; 5584 u32 rates = 0, basic_rates = 0; 5585 bool have_higher_than_11mbit = false; 5586 int min_rate = INT_MAX, min_rate_index = -1; 5587 struct ieee80211_supported_band *sband; 5588 5589 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5590 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5591 5592 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5593 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5594 ieee80211_s1g_sta_rate_init(sta); 5595 return 0; 5596 } 5597 5598 sband = local->hw.wiphy->bands[cbss->channel->band]; 5599 5600 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5601 NULL, 0, 5602 &rates, &basic_rates, NULL, 5603 &have_higher_than_11mbit, 5604 &min_rate, &min_rate_index); 5605 5606 /* 5607 * This used to be a workaround for basic rates missing 5608 * in the association response frame. Now that we no 5609 * longer use the basic rates from there, it probably 5610 * doesn't happen any more, but keep the workaround so 5611 * in case some *other* APs are buggy in different ways 5612 * we can connect -- with a warning. 5613 * Allow this workaround only in case the AP provided at least 5614 * one rate. 5615 */ 5616 if (min_rate_index < 0) { 5617 link_info(link, "No legacy rates in association response\n"); 5618 return -EINVAL; 5619 } else if (!basic_rates) { 5620 link_info(link, "No basic rates, using min rate instead\n"); 5621 basic_rates = BIT(min_rate_index); 5622 } 5623 5624 if (rates) 5625 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5626 else 5627 link_info(link, "No rates found, keeping mandatory only\n"); 5628 5629 link->conf->basic_rates = basic_rates; 5630 5631 /* cf. IEEE 802.11 9.2.12 */ 5632 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5633 have_higher_than_11mbit; 5634 5635 return 0; 5636 } 5637 5638 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5639 struct cfg80211_bss *cbss) 5640 { 5641 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5642 const struct element *ht_cap_elem, *vht_cap_elem; 5643 const struct cfg80211_bss_ies *ies; 5644 const struct ieee80211_ht_cap *ht_cap; 5645 const struct ieee80211_vht_cap *vht_cap; 5646 const struct ieee80211_he_cap_elem *he_cap; 5647 const struct element *he_cap_elem; 5648 u16 mcs_80_map, mcs_160_map; 5649 int i, mcs_nss_size; 5650 bool support_160; 5651 u8 chains = 1; 5652 5653 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5654 return chains; 5655 5656 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5657 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5658 ht_cap = (void *)ht_cap_elem->data; 5659 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5660 /* 5661 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5662 * "Tx Unequal Modulation Supported" fields. 5663 */ 5664 } 5665 5666 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5667 return chains; 5668 5669 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5670 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5671 u8 nss; 5672 u16 tx_mcs_map; 5673 5674 vht_cap = (void *)vht_cap_elem->data; 5675 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5676 for (nss = 8; nss > 0; nss--) { 5677 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5678 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5679 break; 5680 } 5681 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5682 chains = max(chains, nss); 5683 } 5684 5685 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5686 return chains; 5687 5688 ies = rcu_dereference(cbss->ies); 5689 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5690 ies->data, ies->len); 5691 5692 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5693 return chains; 5694 5695 /* skip one byte ext_tag_id */ 5696 he_cap = (void *)(he_cap_elem->data + 1); 5697 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5698 5699 /* invalid HE IE */ 5700 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5701 return chains; 5702 5703 /* mcs_nss is right after he_cap info */ 5704 he_mcs_nss_supp = (void *)(he_cap + 1); 5705 5706 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5707 5708 for (i = 7; i >= 0; i--) { 5709 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5710 5711 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5712 chains = max_t(u8, chains, i + 1); 5713 break; 5714 } 5715 } 5716 5717 support_160 = he_cap->phy_cap_info[0] & 5718 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5719 5720 if (!support_160) 5721 return chains; 5722 5723 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5724 for (i = 7; i >= 0; i--) { 5725 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5726 5727 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5728 chains = max_t(u8, chains, i + 1); 5729 break; 5730 } 5731 } 5732 5733 return chains; 5734 } 5735 5736 static void 5737 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5738 struct ieee80211_supported_band *sband, 5739 struct cfg80211_assoc_request *req, 5740 bool wmm_used, int link_id, 5741 struct ieee80211_conn_settings *conn) 5742 { 5743 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5744 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5745 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5746 const struct ieee80211_sta_he_cap *he_cap; 5747 const struct ieee80211_sta_eht_cap *eht_cap; 5748 struct ieee80211_sta_vht_cap vht_cap; 5749 5750 if (sband->band == NL80211_BAND_S1GHZ) { 5751 conn->mode = IEEE80211_CONN_MODE_S1G; 5752 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5753 mlme_dbg(sdata, "operating as S1G STA\n"); 5754 return; 5755 } 5756 5757 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5758 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5759 5760 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5761 5762 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5763 mlme_link_id_dbg(sdata, link_id, 5764 "HT disabled by flag, limiting to legacy\n"); 5765 goto out; 5766 } 5767 5768 if (!wmm_used) { 5769 mlme_link_id_dbg(sdata, link_id, 5770 "WMM/QoS not supported, limiting to legacy\n"); 5771 goto out; 5772 } 5773 5774 if (req) { 5775 unsigned int i; 5776 5777 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5778 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5779 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5780 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5781 netdev_info(sdata->dev, 5782 "WEP/TKIP use, limiting to legacy\n"); 5783 goto out; 5784 } 5785 } 5786 } 5787 5788 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5789 mlme_link_id_dbg(sdata, link_id, 5790 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5791 goto out; 5792 } 5793 5794 /* HT is fine */ 5795 conn->mode = IEEE80211_CONN_MODE_HT; 5796 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5797 IEEE80211_CONN_BW_LIMIT_40 : 5798 IEEE80211_CONN_BW_LIMIT_20; 5799 5800 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5801 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5802 5803 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5804 mlme_link_id_dbg(sdata, link_id, 5805 "VHT disabled by flag, limiting to HT\n"); 5806 goto out; 5807 } 5808 5809 if (vht_cap.vht_supported && is_5ghz) { 5810 bool have_80mhz = false; 5811 unsigned int i; 5812 5813 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5814 mlme_link_id_dbg(sdata, link_id, 5815 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5816 goto out; 5817 } 5818 5819 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5820 for (i = 0; i < sband->n_channels; i++) { 5821 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5822 IEEE80211_CHAN_NO_80MHZ)) 5823 continue; 5824 5825 have_80mhz = true; 5826 break; 5827 } 5828 5829 if (!have_80mhz) { 5830 mlme_link_id_dbg(sdata, link_id, 5831 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5832 goto out; 5833 } 5834 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5835 mlme_link_id_dbg(sdata, link_id, 5836 "no VHT support on 5 GHz, limiting to HT\n"); 5837 goto out; 5838 } 5839 5840 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5841 if (sband->band != NL80211_BAND_2GHZ) { 5842 conn->mode = IEEE80211_CONN_MODE_VHT; 5843 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5844 } 5845 5846 if (is_5ghz && 5847 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5848 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5849 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5850 mlme_link_id_dbg(sdata, link_id, 5851 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5852 } 5853 5854 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5855 mlme_link_id_dbg(sdata, link_id, 5856 "HE disabled by flag, limiting to HT/VHT\n"); 5857 goto out; 5858 } 5859 5860 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5861 if (!he_cap) { 5862 WARN_ON(is_6ghz); 5863 mlme_link_id_dbg(sdata, link_id, 5864 "no HE support, limiting to HT/VHT\n"); 5865 goto out; 5866 } 5867 5868 /* so we have HE */ 5869 conn->mode = IEEE80211_CONN_MODE_HE; 5870 5871 /* check bandwidth */ 5872 switch (sband->band) { 5873 default: 5874 case NL80211_BAND_2GHZ: 5875 if (he_cap->he_cap_elem.phy_cap_info[0] & 5876 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5877 break; 5878 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5879 mlme_link_id_dbg(sdata, link_id, 5880 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5881 break; 5882 case NL80211_BAND_5GHZ: 5883 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5884 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5885 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5886 mlme_link_id_dbg(sdata, link_id, 5887 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5888 break; 5889 } 5890 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5891 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5892 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5893 conn->bw_limit, 5894 IEEE80211_CONN_BW_LIMIT_80); 5895 mlme_link_id_dbg(sdata, link_id, 5896 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5897 } 5898 break; 5899 case NL80211_BAND_6GHZ: 5900 if (he_cap->he_cap_elem.phy_cap_info[0] & 5901 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5902 break; 5903 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5904 conn->bw_limit, 5905 IEEE80211_CONN_BW_LIMIT_80); 5906 mlme_link_id_dbg(sdata, link_id, 5907 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5908 break; 5909 } 5910 5911 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5912 mlme_link_id_dbg(sdata, link_id, 5913 "EHT disabled by flag, limiting to HE\n"); 5914 goto out; 5915 } 5916 5917 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5918 if (!eht_cap) { 5919 mlme_link_id_dbg(sdata, link_id, 5920 "no EHT support, limiting to HE\n"); 5921 goto out; 5922 } 5923 5924 /* we have EHT */ 5925 5926 conn->mode = IEEE80211_CONN_MODE_EHT; 5927 5928 /* check bandwidth */ 5929 if (is_6ghz && 5930 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5931 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5932 else if (is_6ghz) 5933 mlme_link_id_dbg(sdata, link_id, 5934 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5935 5936 out: 5937 mlme_link_id_dbg(sdata, link_id, 5938 "determined local STA to be %s, BW limited to %d MHz\n", 5939 ieee80211_conn_mode_str(conn->mode), 5940 20 * (1 << conn->bw_limit)); 5941 } 5942 5943 static void 5944 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5945 struct ieee80211_supported_band *sband, 5946 struct cfg80211_auth_request *req, 5947 bool wmm_used, 5948 struct ieee80211_conn_settings *conn) 5949 { 5950 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5951 req->link_id > 0 ? req->link_id : 0, 5952 conn); 5953 } 5954 5955 static void 5956 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5957 struct ieee80211_supported_band *sband, 5958 struct cfg80211_assoc_request *req, 5959 bool wmm_used, int link_id, 5960 struct ieee80211_conn_settings *conn) 5961 { 5962 struct ieee80211_conn_settings tmp; 5963 5964 WARN_ON(!req); 5965 5966 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5967 &tmp); 5968 5969 conn->mode = min_t(enum ieee80211_conn_mode, 5970 conn->mode, tmp.mode); 5971 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5972 conn->bw_limit, tmp.bw_limit); 5973 } 5974 5975 static enum ieee80211_ap_reg_power 5976 ieee80211_ap_power_type(u8 control) 5977 { 5978 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5979 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5980 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5981 return IEEE80211_REG_LPI_AP; 5982 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5983 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5984 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD: 5985 return IEEE80211_REG_SP_AP; 5986 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5987 return IEEE80211_REG_VLP_AP; 5988 default: 5989 return IEEE80211_REG_UNSET_AP; 5990 } 5991 } 5992 5993 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5994 struct ieee80211_link_data *link, 5995 int link_id, 5996 struct cfg80211_bss *cbss, bool mlo, 5997 struct ieee80211_conn_settings *conn, 5998 unsigned long *userspace_selectors) 5999 { 6000 struct ieee80211_local *local = sdata->local; 6001 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6002 struct ieee80211_chan_req chanreq = {}; 6003 struct cfg80211_chan_def ap_chandef; 6004 struct ieee802_11_elems *elems; 6005 int ret; 6006 6007 lockdep_assert_wiphy(local->hw.wiphy); 6008 6009 rcu_read_lock(); 6010 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6011 &chanreq, &ap_chandef, 6012 userspace_selectors); 6013 6014 if (IS_ERR(elems)) { 6015 rcu_read_unlock(); 6016 return PTR_ERR(elems); 6017 } 6018 6019 if (mlo && !elems->ml_basic) { 6020 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6021 rcu_read_unlock(); 6022 kfree(elems); 6023 return -EINVAL; 6024 } 6025 6026 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6027 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6028 6029 if (elems->pwr_constr_elem) 6030 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6031 6032 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6033 if (he_6ghz_oper) 6034 link->conf->power_type = 6035 ieee80211_ap_power_type(he_6ghz_oper->control); 6036 else 6037 link_info(link, 6038 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6039 cbss->channel->center_freq); 6040 6041 link->conf->tpe = elems->tpe; 6042 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6043 &chanreq.oper); 6044 } 6045 rcu_read_unlock(); 6046 /* the element data was RCU protected so no longer valid anyway */ 6047 kfree(elems); 6048 elems = NULL; 6049 6050 if (!link) 6051 return 0; 6052 6053 rcu_read_lock(); 6054 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6055 local->rx_chains); 6056 rcu_read_unlock(); 6057 6058 /* 6059 * If this fails (possibly due to channel context sharing 6060 * on incompatible channels, e.g. 80+80 and 160 sharing the 6061 * same control channel) try to use a smaller bandwidth. 6062 */ 6063 ret = ieee80211_link_use_channel(link, &chanreq, 6064 IEEE80211_CHANCTX_SHARED); 6065 6066 /* don't downgrade for 5 and 10 MHz channels, though. */ 6067 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6068 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6069 return ret; 6070 6071 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6072 ieee80211_chanreq_downgrade(&chanreq, conn); 6073 6074 ret = ieee80211_link_use_channel(link, &chanreq, 6075 IEEE80211_CHANCTX_SHARED); 6076 } 6077 6078 return ret; 6079 } 6080 6081 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6082 u8 *dtim_count, u8 *dtim_period) 6083 { 6084 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6085 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6086 ies->len); 6087 const struct ieee80211_tim_ie *tim = NULL; 6088 const struct ieee80211_bssid_index *idx; 6089 bool valid = tim_ie && tim_ie[1] >= 2; 6090 6091 if (valid) 6092 tim = (void *)(tim_ie + 2); 6093 6094 if (dtim_count) 6095 *dtim_count = valid ? tim->dtim_count : 0; 6096 6097 if (dtim_period) 6098 *dtim_period = valid ? tim->dtim_period : 0; 6099 6100 /* Check if value is overridden by non-transmitted profile */ 6101 if (!idx_ie || idx_ie[1] < 3) 6102 return valid; 6103 6104 idx = (void *)(idx_ie + 2); 6105 6106 if (dtim_count) 6107 *dtim_count = idx->dtim_count; 6108 6109 if (dtim_period) 6110 *dtim_period = idx->dtim_period; 6111 6112 return true; 6113 } 6114 6115 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6116 struct ieee80211_mgmt *mgmt, 6117 struct ieee802_11_elems *elems, 6118 const u8 *elem_start, unsigned int elem_len) 6119 { 6120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6121 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6122 struct ieee80211_local *local = sdata->local; 6123 unsigned int link_id; 6124 struct sta_info *sta; 6125 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6126 u16 valid_links = 0, dormant_links = 0; 6127 int err; 6128 6129 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6130 /* 6131 * station info was already allocated and inserted before 6132 * the association and should be available to us 6133 */ 6134 sta = sta_info_get(sdata, assoc_data->ap_addr); 6135 if (WARN_ON(!sta)) 6136 goto out_err; 6137 6138 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6139 6140 if (ieee80211_vif_is_mld(&sdata->vif)) { 6141 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6142 if (!assoc_data->link[link_id].bss) 6143 continue; 6144 6145 valid_links |= BIT(link_id); 6146 if (assoc_data->link[link_id].disabled) 6147 dormant_links |= BIT(link_id); 6148 6149 if (link_id != assoc_data->assoc_link_id) { 6150 err = ieee80211_sta_allocate_link(sta, link_id); 6151 if (err) 6152 goto out_err; 6153 } 6154 } 6155 6156 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6157 } 6158 6159 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6160 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6161 struct ieee80211_link_data *link; 6162 struct link_sta_info *link_sta; 6163 6164 if (!cbss) 6165 continue; 6166 6167 link = sdata_dereference(sdata->link[link_id], sdata); 6168 if (WARN_ON(!link)) 6169 goto out_err; 6170 6171 if (ieee80211_vif_is_mld(&sdata->vif)) 6172 link_info(link, 6173 "local address %pM, AP link address %pM%s\n", 6174 link->conf->addr, 6175 assoc_data->link[link_id].bss->bssid, 6176 link_id == assoc_data->assoc_link_id ? 6177 " (assoc)" : ""); 6178 6179 link_sta = rcu_dereference_protected(sta->link[link_id], 6180 lockdep_is_held(&local->hw.wiphy->mtx)); 6181 if (WARN_ON(!link_sta)) 6182 goto out_err; 6183 6184 if (!link->u.mgd.have_beacon) { 6185 const struct cfg80211_bss_ies *ies; 6186 6187 rcu_read_lock(); 6188 ies = rcu_dereference(cbss->beacon_ies); 6189 if (ies) 6190 link->u.mgd.have_beacon = true; 6191 else 6192 ies = rcu_dereference(cbss->ies); 6193 ieee80211_get_dtim(ies, 6194 &link->conf->sync_dtim_count, 6195 &link->u.mgd.dtim_period); 6196 link->conf->beacon_int = cbss->beacon_interval; 6197 rcu_read_unlock(); 6198 } 6199 6200 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6201 6202 if (link_id != assoc_data->assoc_link_id) { 6203 link->u.mgd.conn = assoc_data->link[link_id].conn; 6204 6205 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6206 true, &link->u.mgd.conn, 6207 sdata->u.mgd.userspace_selectors); 6208 if (err) { 6209 link_info(link, "prep_channel failed\n"); 6210 goto out_err; 6211 } 6212 } 6213 6214 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6215 assoc_data->link[link_id].bss); 6216 if (err) 6217 goto out_err; 6218 6219 if (!ieee80211_assoc_config_link(link, link_sta, 6220 assoc_data->link[link_id].bss, 6221 mgmt, elem_start, elem_len, 6222 &changed[link_id])) 6223 goto out_err; 6224 6225 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6226 valid_links &= ~BIT(link_id); 6227 ieee80211_sta_remove_link(sta, link_id); 6228 continue; 6229 } 6230 6231 if (link_id != assoc_data->assoc_link_id) { 6232 err = ieee80211_sta_activate_link(sta, link_id); 6233 if (err) 6234 goto out_err; 6235 } 6236 } 6237 6238 /* links might have changed due to rejected ones, set them again */ 6239 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6240 6241 rate_control_rate_init_all_links(sta); 6242 6243 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6244 set_sta_flag(sta, WLAN_STA_MFP); 6245 sta->sta.mfp = true; 6246 } else { 6247 sta->sta.mfp = false; 6248 } 6249 6250 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6251 elems->ext_capab_len); 6252 6253 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6254 local->hw.queues >= IEEE80211_NUM_ACS; 6255 6256 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6257 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6258 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6259 if (err) { 6260 sdata_info(sdata, 6261 "failed to move station %pM to desired state\n", 6262 sta->sta.addr); 6263 WARN_ON(__sta_info_destroy(sta)); 6264 goto out_err; 6265 } 6266 6267 if (sdata->wdev.use_4addr) 6268 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6269 6270 ieee80211_set_associated(sdata, assoc_data, changed); 6271 6272 /* 6273 * If we're using 4-addr mode, let the AP know that we're 6274 * doing so, so that it can create the STA VLAN on its side 6275 */ 6276 if (ifmgd->use_4addr) 6277 ieee80211_send_4addr_nullfunc(local, sdata); 6278 6279 /* 6280 * Start timer to probe the connection to the AP now. 6281 * Also start the timer that will detect beacon loss. 6282 */ 6283 ieee80211_sta_reset_beacon_monitor(sdata); 6284 ieee80211_sta_reset_conn_monitor(sdata); 6285 6286 return true; 6287 out_err: 6288 eth_zero_addr(sdata->vif.cfg.ap_addr); 6289 return false; 6290 } 6291 6292 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6293 struct ieee80211_mgmt *mgmt, 6294 size_t len) 6295 { 6296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6297 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6298 u16 capab_info, status_code, aid; 6299 struct ieee80211_elems_parse_params parse_params = { 6300 .bss = NULL, 6301 .link_id = -1, 6302 .from_ap = true, 6303 }; 6304 struct ieee802_11_elems *elems; 6305 int ac; 6306 const u8 *elem_start; 6307 unsigned int elem_len; 6308 bool reassoc; 6309 struct ieee80211_event event = { 6310 .type = MLME_EVENT, 6311 .u.mlme.data = ASSOC_EVENT, 6312 }; 6313 struct ieee80211_prep_tx_info info = {}; 6314 struct cfg80211_rx_assoc_resp_data resp = { 6315 .uapsd_queues = -1, 6316 }; 6317 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6318 unsigned int link_id; 6319 6320 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6321 6322 if (!assoc_data) 6323 return; 6324 6325 info.link_id = assoc_data->assoc_link_id; 6326 6327 parse_params.mode = 6328 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6329 6330 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6331 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6332 return; 6333 6334 /* 6335 * AssocResp and ReassocResp have identical structure, so process both 6336 * of them in this function. 6337 */ 6338 6339 if (len < 24 + 6) 6340 return; 6341 6342 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6343 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6344 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6345 if (assoc_data->s1g) 6346 elem_start = mgmt->u.s1g_assoc_resp.variable; 6347 else 6348 elem_start = mgmt->u.assoc_resp.variable; 6349 6350 /* 6351 * Note: this may not be perfect, AP might misbehave - if 6352 * anyone needs to rely on perfect complete notification 6353 * with the exact right subtype, then we need to track what 6354 * we actually transmitted. 6355 */ 6356 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6357 IEEE80211_STYPE_ASSOC_REQ; 6358 6359 if (assoc_data->fils_kek_len && 6360 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6361 return; 6362 6363 elem_len = len - (elem_start - (u8 *)mgmt); 6364 parse_params.start = elem_start; 6365 parse_params.len = elem_len; 6366 elems = ieee802_11_parse_elems_full(&parse_params); 6367 if (!elems) 6368 goto notify_driver; 6369 6370 if (elems->aid_resp) 6371 aid = le16_to_cpu(elems->aid_resp->aid); 6372 else if (assoc_data->s1g) 6373 aid = 0; /* TODO */ 6374 else 6375 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6376 6377 /* 6378 * The 5 MSB of the AID field are reserved 6379 * (802.11-2016 9.4.1.8 AID field) 6380 */ 6381 aid &= 0x7ff; 6382 6383 sdata_info(sdata, 6384 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6385 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6386 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6387 6388 ifmgd->broken_ap = false; 6389 6390 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6391 elems->timeout_int && 6392 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6393 u32 tu, ms; 6394 6395 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6396 le32_to_cpu(elems->timeout_int->value)); 6397 6398 tu = le32_to_cpu(elems->timeout_int->value); 6399 ms = tu * 1024 / 1000; 6400 sdata_info(sdata, 6401 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6402 assoc_data->ap_addr, tu, ms); 6403 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6404 assoc_data->timeout_started = true; 6405 assoc_data->comeback = true; 6406 if (ms > IEEE80211_ASSOC_TIMEOUT) 6407 run_again(sdata, assoc_data->timeout); 6408 goto notify_driver; 6409 } 6410 6411 if (status_code != WLAN_STATUS_SUCCESS) { 6412 sdata_info(sdata, "%pM denied association (code=%d)\n", 6413 assoc_data->ap_addr, status_code); 6414 event.u.mlme.status = MLME_DENIED; 6415 event.u.mlme.reason = status_code; 6416 drv_event_callback(sdata->local, sdata, &event); 6417 } else { 6418 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6419 sdata_info(sdata, 6420 "invalid AID value %d (out of range), turn off PS\n", 6421 aid); 6422 aid = 0; 6423 ifmgd->broken_ap = true; 6424 } 6425 6426 if (ieee80211_vif_is_mld(&sdata->vif)) { 6427 struct ieee80211_mle_basic_common_info *common; 6428 6429 if (!elems->ml_basic) { 6430 sdata_info(sdata, 6431 "MLO association with %pM but no (basic) multi-link element in response!\n", 6432 assoc_data->ap_addr); 6433 goto abandon_assoc; 6434 } 6435 6436 common = (void *)elems->ml_basic->variable; 6437 6438 if (memcmp(assoc_data->ap_addr, 6439 common->mld_mac_addr, ETH_ALEN)) { 6440 sdata_info(sdata, 6441 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6442 common->mld_mac_addr, 6443 assoc_data->ap_addr); 6444 goto abandon_assoc; 6445 } 6446 6447 sdata->vif.cfg.eml_cap = 6448 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6449 sdata->vif.cfg.eml_med_sync_delay = 6450 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6451 sdata->vif.cfg.mld_capa_op = 6452 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6453 } 6454 6455 sdata->vif.cfg.aid = aid; 6456 6457 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6458 elem_start, elem_len)) { 6459 /* oops -- internal error -- send timeout for now */ 6460 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6461 goto notify_driver; 6462 } 6463 event.u.mlme.status = MLME_SUCCESS; 6464 drv_event_callback(sdata->local, sdata, &event); 6465 sdata_info(sdata, "associated\n"); 6466 6467 info.success = 1; 6468 } 6469 6470 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6471 struct ieee80211_link_data *link; 6472 6473 if (!assoc_data->link[link_id].bss) 6474 continue; 6475 6476 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6477 ether_addr_copy(resp.links[link_id].addr, 6478 assoc_data->link[link_id].addr); 6479 resp.links[link_id].status = assoc_data->link[link_id].status; 6480 6481 link = sdata_dereference(sdata->link[link_id], sdata); 6482 if (!link) 6483 continue; 6484 6485 /* get uapsd queues configuration - same for all links */ 6486 resp.uapsd_queues = 0; 6487 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6488 if (link->tx_conf[ac].uapsd) 6489 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6490 } 6491 6492 if (ieee80211_vif_is_mld(&sdata->vif)) { 6493 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6494 resp.ap_mld_addr = ap_mld_addr; 6495 } 6496 6497 ieee80211_destroy_assoc_data(sdata, 6498 status_code == WLAN_STATUS_SUCCESS ? 6499 ASSOC_SUCCESS : 6500 ASSOC_REJECTED); 6501 6502 resp.buf = (u8 *)mgmt; 6503 resp.len = len; 6504 resp.req_ies = ifmgd->assoc_req_ies; 6505 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6506 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6507 notify_driver: 6508 drv_mgd_complete_tx(sdata->local, sdata, &info); 6509 kfree(elems); 6510 return; 6511 abandon_assoc: 6512 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6513 goto notify_driver; 6514 } 6515 6516 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6517 struct ieee80211_mgmt *mgmt, size_t len, 6518 struct ieee80211_rx_status *rx_status) 6519 { 6520 struct ieee80211_sub_if_data *sdata = link->sdata; 6521 struct ieee80211_local *local = sdata->local; 6522 struct ieee80211_bss *bss; 6523 struct ieee80211_channel *channel; 6524 6525 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6526 6527 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6528 ieee80211_rx_status_to_khz(rx_status)); 6529 if (!channel) 6530 return; 6531 6532 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6533 if (bss) { 6534 link->conf->beacon_rate = bss->beacon_rate; 6535 ieee80211_rx_bss_put(local, bss); 6536 } 6537 } 6538 6539 6540 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6541 struct sk_buff *skb) 6542 { 6543 struct ieee80211_sub_if_data *sdata = link->sdata; 6544 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6545 struct ieee80211_if_managed *ifmgd; 6546 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6547 struct ieee80211_channel *channel; 6548 size_t baselen, len = skb->len; 6549 6550 ifmgd = &sdata->u.mgd; 6551 6552 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6553 6554 /* 6555 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6556 * "If a 6 GHz AP receives a Probe Request frame and responds with 6557 * a Probe Response frame [..], the Address 1 field of the Probe 6558 * Response frame shall be set to the broadcast address [..]" 6559 * So, on 6GHz band we should also accept broadcast responses. 6560 */ 6561 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6562 rx_status->freq); 6563 if (!channel) 6564 return; 6565 6566 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6567 (channel->band != NL80211_BAND_6GHZ || 6568 !is_broadcast_ether_addr(mgmt->da))) 6569 return; /* ignore ProbeResp to foreign address */ 6570 6571 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6572 if (baselen > len) 6573 return; 6574 6575 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6576 6577 if (ifmgd->associated && 6578 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6579 ieee80211_reset_ap_probe(sdata); 6580 } 6581 6582 /* 6583 * This is the canonical list of information elements we care about, 6584 * the filter code also gives us all changes to the Microsoft OUI 6585 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6586 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6587 * changes to requested client power. 6588 * 6589 * We implement beacon filtering in software since that means we can 6590 * avoid processing the frame here and in cfg80211, and userspace 6591 * will not be able to tell whether the hardware supports it or not. 6592 * 6593 * XXX: This list needs to be dynamic -- userspace needs to be able to 6594 * add items it requires. It also needs to be able to tell us to 6595 * look out for other vendor IEs. 6596 */ 6597 static const u64 care_about_ies = 6598 (1ULL << WLAN_EID_COUNTRY) | 6599 (1ULL << WLAN_EID_ERP_INFO) | 6600 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6601 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6602 (1ULL << WLAN_EID_HT_CAPABILITY) | 6603 (1ULL << WLAN_EID_HT_OPERATION) | 6604 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6605 6606 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6607 struct ieee80211_if_managed *ifmgd, 6608 struct ieee80211_bss_conf *bss_conf, 6609 struct ieee80211_local *local, 6610 struct ieee80211_rx_status *rx_status) 6611 { 6612 struct ieee80211_sub_if_data *sdata = link->sdata; 6613 6614 /* Track average RSSI from the Beacon frames of the current AP */ 6615 6616 if (!link->u.mgd.tracking_signal_avg) { 6617 link->u.mgd.tracking_signal_avg = true; 6618 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6619 link->u.mgd.last_cqm_event_signal = 0; 6620 link->u.mgd.count_beacon_signal = 1; 6621 link->u.mgd.last_ave_beacon_signal = 0; 6622 } else { 6623 link->u.mgd.count_beacon_signal++; 6624 } 6625 6626 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6627 -rx_status->signal); 6628 6629 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6630 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6631 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6632 int last_sig = link->u.mgd.last_ave_beacon_signal; 6633 struct ieee80211_event event = { 6634 .type = RSSI_EVENT, 6635 }; 6636 6637 /* 6638 * if signal crosses either of the boundaries, invoke callback 6639 * with appropriate parameters 6640 */ 6641 if (sig > ifmgd->rssi_max_thold && 6642 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6643 link->u.mgd.last_ave_beacon_signal = sig; 6644 event.u.rssi.data = RSSI_EVENT_HIGH; 6645 drv_event_callback(local, sdata, &event); 6646 } else if (sig < ifmgd->rssi_min_thold && 6647 (last_sig >= ifmgd->rssi_max_thold || 6648 last_sig == 0)) { 6649 link->u.mgd.last_ave_beacon_signal = sig; 6650 event.u.rssi.data = RSSI_EVENT_LOW; 6651 drv_event_callback(local, sdata, &event); 6652 } 6653 } 6654 6655 if (bss_conf->cqm_rssi_thold && 6656 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6657 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6658 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6659 int last_event = link->u.mgd.last_cqm_event_signal; 6660 int thold = bss_conf->cqm_rssi_thold; 6661 int hyst = bss_conf->cqm_rssi_hyst; 6662 6663 if (sig < thold && 6664 (last_event == 0 || sig < last_event - hyst)) { 6665 link->u.mgd.last_cqm_event_signal = sig; 6666 ieee80211_cqm_rssi_notify( 6667 &sdata->vif, 6668 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6669 sig, GFP_KERNEL); 6670 } else if (sig > thold && 6671 (last_event == 0 || sig > last_event + hyst)) { 6672 link->u.mgd.last_cqm_event_signal = sig; 6673 ieee80211_cqm_rssi_notify( 6674 &sdata->vif, 6675 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6676 sig, GFP_KERNEL); 6677 } 6678 } 6679 6680 if (bss_conf->cqm_rssi_low && 6681 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6682 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6683 int last_event = link->u.mgd.last_cqm_event_signal; 6684 int low = bss_conf->cqm_rssi_low; 6685 int high = bss_conf->cqm_rssi_high; 6686 6687 if (sig < low && 6688 (last_event == 0 || last_event >= low)) { 6689 link->u.mgd.last_cqm_event_signal = sig; 6690 ieee80211_cqm_rssi_notify( 6691 &sdata->vif, 6692 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6693 sig, GFP_KERNEL); 6694 } else if (sig > high && 6695 (last_event == 0 || last_event <= high)) { 6696 link->u.mgd.last_cqm_event_signal = sig; 6697 ieee80211_cqm_rssi_notify( 6698 &sdata->vif, 6699 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6700 sig, GFP_KERNEL); 6701 } 6702 } 6703 } 6704 6705 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6706 struct cfg80211_bss *bss) 6707 { 6708 if (ether_addr_equal(tx_bssid, bss->bssid)) 6709 return true; 6710 if (!bss->transmitted_bss) 6711 return false; 6712 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6713 } 6714 6715 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6716 struct wiphy_work *work) 6717 { 6718 struct ieee80211_sub_if_data *sdata = 6719 container_of(work, struct ieee80211_sub_if_data, 6720 u.mgd.ml_reconf_work.work); 6721 u16 new_valid_links, new_active_links, new_dormant_links; 6722 int ret; 6723 6724 if (!sdata->u.mgd.removed_links) 6725 return; 6726 6727 sdata_info(sdata, 6728 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6729 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6730 6731 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6732 if (new_valid_links == sdata->vif.valid_links) 6733 return; 6734 6735 if (!new_valid_links || 6736 !(new_valid_links & ~sdata->vif.dormant_links)) { 6737 sdata_info(sdata, "No valid links after reconfiguration\n"); 6738 ret = -EINVAL; 6739 goto out; 6740 } 6741 6742 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6743 if (new_active_links != sdata->vif.active_links) { 6744 if (!new_active_links) 6745 new_active_links = 6746 BIT(ffs(new_valid_links & 6747 ~sdata->vif.dormant_links) - 1); 6748 6749 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6750 if (ret) { 6751 sdata_info(sdata, 6752 "Failed setting active links\n"); 6753 goto out; 6754 } 6755 } 6756 6757 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6758 6759 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6760 new_dormant_links); 6761 if (ret) 6762 sdata_info(sdata, "Failed setting valid links\n"); 6763 6764 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6765 6766 out: 6767 if (!ret) 6768 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6769 else 6770 __ieee80211_disconnect(sdata); 6771 6772 sdata->u.mgd.removed_links = 0; 6773 } 6774 6775 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6776 struct ieee802_11_elems *elems) 6777 { 6778 const struct element *sub; 6779 unsigned long removed_links = 0; 6780 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6781 u8 link_id; 6782 u32 delay; 6783 6784 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6785 return; 6786 6787 /* Directly parse the sub elements as the common information doesn't 6788 * hold any useful information. 6789 */ 6790 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6791 elems->ml_reconf_len) { 6792 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6793 u8 *pos = prof->variable; 6794 u16 control; 6795 6796 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6797 continue; 6798 6799 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6800 sub->datalen)) 6801 return; 6802 6803 control = le16_to_cpu(prof->control); 6804 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6805 6806 removed_links |= BIT(link_id); 6807 6808 /* the MAC address should not be included, but handle it */ 6809 if (control & 6810 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6811 pos += 6; 6812 6813 /* According to Draft P802.11be_D3.0, the control should 6814 * include the AP Removal Timer present. If the AP Removal Timer 6815 * is not present assume immediate removal. 6816 */ 6817 if (control & 6818 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6819 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6820 } 6821 6822 removed_links &= sdata->vif.valid_links; 6823 if (!removed_links) { 6824 /* In case the removal was cancelled, abort it */ 6825 if (sdata->u.mgd.removed_links) { 6826 sdata->u.mgd.removed_links = 0; 6827 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6828 &sdata->u.mgd.ml_reconf_work); 6829 } 6830 return; 6831 } 6832 6833 delay = 0; 6834 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6835 struct ieee80211_bss_conf *link_conf = 6836 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6837 u32 link_delay; 6838 6839 if (!link_conf) { 6840 removed_links &= ~BIT(link_id); 6841 continue; 6842 } 6843 6844 if (link_removal_timeout[link_id] < 1) 6845 link_delay = 0; 6846 else 6847 link_delay = link_conf->beacon_int * 6848 (link_removal_timeout[link_id] - 1); 6849 6850 if (!delay) 6851 delay = link_delay; 6852 else 6853 delay = min(delay, link_delay); 6854 } 6855 6856 sdata->u.mgd.removed_links = removed_links; 6857 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6858 &sdata->u.mgd.ml_reconf_work, 6859 TU_TO_JIFFIES(delay)); 6860 } 6861 6862 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6863 u16 active_links, u16 dormant_links, 6864 u16 suspended_links) 6865 { 6866 u64 changed = 0; 6867 int ret; 6868 6869 if (!active_links) { 6870 ret = -EINVAL; 6871 goto out; 6872 } 6873 6874 /* If there is an active negotiated TTLM, it should be discarded by 6875 * the new negotiated/advertised TTLM. 6876 */ 6877 if (sdata->vif.neg_ttlm.valid) { 6878 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6879 sdata->vif.suspended_links = 0; 6880 changed = BSS_CHANGED_MLD_TTLM; 6881 } 6882 6883 if (sdata->vif.active_links != active_links) { 6884 /* usable links are affected when active_links are changed, 6885 * so notify the driver about the status change 6886 */ 6887 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6888 active_links &= sdata->vif.active_links; 6889 if (!active_links) 6890 active_links = 6891 BIT(__ffs(sdata->vif.valid_links & 6892 ~dormant_links)); 6893 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6894 if (ret) { 6895 sdata_info(sdata, "Failed to set TTLM active links\n"); 6896 goto out; 6897 } 6898 } 6899 6900 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6901 dormant_links); 6902 if (ret) { 6903 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6904 goto out; 6905 } 6906 6907 sdata->vif.suspended_links = suspended_links; 6908 if (sdata->vif.suspended_links) 6909 changed |= BSS_CHANGED_MLD_TTLM; 6910 6911 ieee80211_vif_cfg_change_notify(sdata, changed); 6912 6913 out: 6914 if (ret) 6915 ieee80211_disconnect(&sdata->vif, false); 6916 6917 return ret; 6918 } 6919 6920 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6921 struct wiphy_work *work) 6922 { 6923 u16 new_active_links, new_dormant_links; 6924 struct ieee80211_sub_if_data *sdata = 6925 container_of(work, struct ieee80211_sub_if_data, 6926 u.mgd.ttlm_work.work); 6927 6928 new_active_links = sdata->u.mgd.ttlm_info.map & 6929 sdata->vif.valid_links; 6930 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6931 sdata->vif.valid_links; 6932 6933 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6934 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6935 0)) 6936 return; 6937 6938 sdata->u.mgd.ttlm_info.active = true; 6939 sdata->u.mgd.ttlm_info.switch_time = 0; 6940 } 6941 6942 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6943 { 6944 if (bm_size == 1) 6945 return *data; 6946 else 6947 return get_unaligned_le16(data); 6948 } 6949 6950 static int 6951 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6952 const struct ieee80211_ttlm_elem *ttlm, 6953 struct ieee80211_adv_ttlm_info *ttlm_info) 6954 { 6955 /* The element size was already validated in 6956 * ieee80211_tid_to_link_map_size_ok() 6957 */ 6958 u8 control, link_map_presence, map_size, tid; 6959 u8 *pos; 6960 6961 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6962 pos = (void *)ttlm->optional; 6963 control = ttlm->control; 6964 6965 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6966 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6967 return 0; 6968 6969 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6970 IEEE80211_TTLM_DIRECTION_BOTH) { 6971 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6972 return -EINVAL; 6973 } 6974 6975 link_map_presence = *pos; 6976 pos++; 6977 6978 ttlm_info->switch_time = get_unaligned_le16(pos); 6979 6980 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6981 * by 1. 6982 */ 6983 if (!ttlm_info->switch_time) 6984 ttlm_info->switch_time = 1; 6985 6986 pos += 2; 6987 6988 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6989 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6990 pos += 3; 6991 } 6992 6993 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6994 map_size = 1; 6995 else 6996 map_size = 2; 6997 6998 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6999 * not advertise a TID-to-link mapping that does not map all TIDs to the 7000 * same link set, reject frame if not all links have mapping 7001 */ 7002 if (link_map_presence != 0xff) { 7003 sdata_info(sdata, 7004 "Invalid advertised T2L mapping presence indicator\n"); 7005 return -EINVAL; 7006 } 7007 7008 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7009 if (!ttlm_info->map) { 7010 sdata_info(sdata, 7011 "Invalid advertised T2L map for TID 0\n"); 7012 return -EINVAL; 7013 } 7014 7015 pos += map_size; 7016 7017 for (tid = 1; tid < 8; tid++) { 7018 u16 map = ieee80211_get_ttlm(map_size, pos); 7019 7020 if (map != ttlm_info->map) { 7021 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7022 tid); 7023 return -EINVAL; 7024 } 7025 7026 pos += map_size; 7027 } 7028 return 0; 7029 } 7030 7031 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7032 struct ieee802_11_elems *elems, 7033 u64 beacon_ts) 7034 { 7035 u8 i; 7036 int ret; 7037 7038 if (!ieee80211_vif_is_mld(&sdata->vif)) 7039 return; 7040 7041 if (!elems->ttlm_num) { 7042 if (sdata->u.mgd.ttlm_info.switch_time) { 7043 /* if a planned TID-to-link mapping was cancelled - 7044 * abort it 7045 */ 7046 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7047 &sdata->u.mgd.ttlm_work); 7048 } else if (sdata->u.mgd.ttlm_info.active) { 7049 /* if no TID-to-link element, set to default mapping in 7050 * which all TIDs are mapped to all setup links 7051 */ 7052 ret = ieee80211_vif_set_links(sdata, 7053 sdata->vif.valid_links, 7054 0); 7055 if (ret) { 7056 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7057 return; 7058 } 7059 ieee80211_vif_cfg_change_notify(sdata, 7060 BSS_CHANGED_MLD_VALID_LINKS); 7061 } 7062 memset(&sdata->u.mgd.ttlm_info, 0, 7063 sizeof(sdata->u.mgd.ttlm_info)); 7064 return; 7065 } 7066 7067 for (i = 0; i < elems->ttlm_num; i++) { 7068 struct ieee80211_adv_ttlm_info ttlm_info; 7069 u32 res; 7070 7071 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7072 &ttlm_info); 7073 7074 if (res) { 7075 __ieee80211_disconnect(sdata); 7076 return; 7077 } 7078 7079 if (ttlm_info.switch_time) { 7080 u16 beacon_ts_tu, st_tu, delay; 7081 u32 delay_jiffies; 7082 u64 mask; 7083 7084 /* The t2l map switch time is indicated with a partial 7085 * TSF value (bits 10 to 25), get the partial beacon TS 7086 * as well, and calc the delay to the start time. 7087 */ 7088 mask = GENMASK_ULL(25, 10); 7089 beacon_ts_tu = (beacon_ts & mask) >> 10; 7090 st_tu = ttlm_info.switch_time; 7091 delay = st_tu - beacon_ts_tu; 7092 7093 /* 7094 * If the switch time is far in the future, then it 7095 * could also be the previous switch still being 7096 * announced. 7097 * We can simply ignore it for now, if it is a future 7098 * switch the AP will continue to announce it anyway. 7099 */ 7100 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7101 return; 7102 7103 delay_jiffies = TU_TO_JIFFIES(delay); 7104 7105 /* Link switching can take time, so schedule it 7106 * 100ms before to be ready on time 7107 */ 7108 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7109 delay_jiffies -= 7110 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7111 else 7112 delay_jiffies = 0; 7113 7114 sdata->u.mgd.ttlm_info = ttlm_info; 7115 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7116 &sdata->u.mgd.ttlm_work); 7117 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7118 &sdata->u.mgd.ttlm_work, 7119 delay_jiffies); 7120 return; 7121 } 7122 } 7123 } 7124 7125 static void 7126 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7127 int reporting_link_id, 7128 struct ieee802_11_elems *elems) 7129 { 7130 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7131 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7132 const struct element *sub; 7133 const u8 *subelems; 7134 size_t subelems_len; 7135 u8 common_size; 7136 int link_id; 7137 7138 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7139 return; 7140 7141 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7142 subelems = (u8 *)elems->ml_basic + common_size; 7143 subelems_len = elems->ml_basic_len - common_size; 7144 7145 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7146 subelems, subelems_len) { 7147 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7148 struct ieee80211_link_data *link; 7149 ssize_t len; 7150 7151 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7152 sub->datalen)) 7153 continue; 7154 7155 link_id = le16_get_bits(prof->control, 7156 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7157 /* need a valid link ID, but also not our own, both AP bugs */ 7158 if (link_id == reporting_link_id || 7159 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7160 continue; 7161 7162 link = sdata_dereference(sdata->link[link_id], sdata); 7163 if (!link) 7164 continue; 7165 7166 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7167 NULL, 0, 7168 IEEE80211_MLE_SUBELEM_FRAGMENT); 7169 if (WARN_ON(len < 0)) 7170 continue; 7171 7172 sta_profiles[link_id] = sub; 7173 sta_profiles_len[link_id] = len; 7174 } 7175 7176 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7177 struct ieee80211_mle_per_sta_profile *prof; 7178 struct ieee802_11_elems *prof_elems; 7179 struct ieee80211_link_data *link; 7180 ssize_t len; 7181 7182 if (link_id == reporting_link_id) 7183 continue; 7184 7185 link = sdata_dereference(sdata->link[link_id], sdata); 7186 if (!link) 7187 continue; 7188 7189 if (!sta_profiles[link_id]) { 7190 prof_elems = NULL; 7191 goto handle; 7192 } 7193 7194 /* we can defragment in-place, won't use the buffer again */ 7195 len = cfg80211_defragment_element(sta_profiles[link_id], 7196 subelems, subelems_len, 7197 (void *)sta_profiles[link_id], 7198 sta_profiles_len[link_id], 7199 IEEE80211_MLE_SUBELEM_FRAGMENT); 7200 if (WARN_ON(len != sta_profiles_len[link_id])) 7201 continue; 7202 7203 prof = (void *)sta_profiles[link_id]; 7204 prof_elems = ieee802_11_parse_elems(prof->variable + 7205 (prof->sta_info_len - 1), 7206 len - 7207 (prof->sta_info_len - 1), 7208 false, NULL); 7209 7210 /* memory allocation failed - let's hope that's transient */ 7211 if (!prof_elems) 7212 continue; 7213 7214 handle: 7215 /* 7216 * FIXME: the timings here are obviously incorrect, 7217 * but only older Intel drivers seem to care, and 7218 * those don't have MLO. If you really need this, 7219 * the problem is having to calculate it with the 7220 * TSF offset etc. The device_timestamp is still 7221 * correct, of course. 7222 */ 7223 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7224 IEEE80211_CSA_SOURCE_OTHER_LINK); 7225 kfree(prof_elems); 7226 } 7227 } 7228 7229 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7230 const struct ieee802_11_elems *elems) 7231 { 7232 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7233 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7234 7235 if (!elems->ssid) 7236 return false; 7237 7238 /* hidden SSID: zero length */ 7239 if (elems->ssid_len == 0) 7240 return false; 7241 7242 if (elems->ssid_len != cfg->ssid_len) 7243 return true; 7244 7245 /* hidden SSID: zeroed out */ 7246 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7247 return false; 7248 7249 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7250 } 7251 7252 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7253 struct ieee80211_hdr *hdr, size_t len, 7254 struct ieee80211_rx_status *rx_status) 7255 { 7256 struct ieee80211_sub_if_data *sdata = link->sdata; 7257 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7258 struct ieee80211_bss_conf *bss_conf = link->conf; 7259 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7260 struct ieee80211_mgmt *mgmt = (void *) hdr; 7261 struct ieee80211_ext *ext = NULL; 7262 size_t baselen; 7263 struct ieee802_11_elems *elems; 7264 struct ieee80211_local *local = sdata->local; 7265 struct ieee80211_chanctx_conf *chanctx_conf; 7266 struct ieee80211_supported_band *sband; 7267 struct ieee80211_channel *chan; 7268 struct link_sta_info *link_sta; 7269 struct sta_info *sta; 7270 u64 changed = 0; 7271 bool erp_valid; 7272 u8 erp_value = 0; 7273 u32 ncrc = 0; 7274 u8 *bssid, *variable = mgmt->u.beacon.variable; 7275 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7276 struct ieee80211_elems_parse_params parse_params = { 7277 .mode = link->u.mgd.conn.mode, 7278 .link_id = -1, 7279 .from_ap = true, 7280 }; 7281 7282 lockdep_assert_wiphy(local->hw.wiphy); 7283 7284 /* Process beacon from the current BSS */ 7285 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7286 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7287 ext = (void *)mgmt; 7288 variable = ext->u.s1g_beacon.variable + 7289 ieee80211_s1g_optional_len(ext->frame_control); 7290 } 7291 7292 baselen = (u8 *) variable - (u8 *) mgmt; 7293 if (baselen > len) 7294 return; 7295 7296 parse_params.start = variable; 7297 parse_params.len = len - baselen; 7298 7299 rcu_read_lock(); 7300 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7301 if (!chanctx_conf) { 7302 rcu_read_unlock(); 7303 return; 7304 } 7305 7306 if (ieee80211_rx_status_to_khz(rx_status) != 7307 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 7308 rcu_read_unlock(); 7309 return; 7310 } 7311 chan = chanctx_conf->def.chan; 7312 rcu_read_unlock(); 7313 7314 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7315 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7316 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7317 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7318 elems = ieee802_11_parse_elems_full(&parse_params); 7319 if (!elems) 7320 return; 7321 7322 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7323 7324 if (elems->dtim_period) 7325 link->u.mgd.dtim_period = elems->dtim_period; 7326 link->u.mgd.have_beacon = true; 7327 ifmgd->assoc_data->need_beacon = false; 7328 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7329 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7330 bss_conf->sync_tsf = 7331 le64_to_cpu(mgmt->u.beacon.timestamp); 7332 bss_conf->sync_device_ts = 7333 rx_status->device_timestamp; 7334 bss_conf->sync_dtim_count = elems->dtim_count; 7335 } 7336 7337 if (elems->mbssid_config_ie) 7338 bss_conf->profile_periodicity = 7339 elems->mbssid_config_ie->profile_periodicity; 7340 else 7341 bss_conf->profile_periodicity = 0; 7342 7343 if (elems->ext_capab_len >= 11 && 7344 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7345 bss_conf->ema_ap = true; 7346 else 7347 bss_conf->ema_ap = false; 7348 7349 /* continue assoc process */ 7350 ifmgd->assoc_data->timeout = jiffies; 7351 ifmgd->assoc_data->timeout_started = true; 7352 run_again(sdata, ifmgd->assoc_data->timeout); 7353 kfree(elems); 7354 return; 7355 } 7356 7357 if (!ifmgd->associated || 7358 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7359 return; 7360 bssid = link->u.mgd.bssid; 7361 7362 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7363 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7364 local, rx_status); 7365 7366 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7367 mlme_dbg_ratelimited(sdata, 7368 "cancelling AP probe due to a received beacon\n"); 7369 ieee80211_reset_ap_probe(sdata); 7370 } 7371 7372 /* 7373 * Push the beacon loss detection into the future since 7374 * we are processing a beacon from the AP just now. 7375 */ 7376 ieee80211_sta_reset_beacon_monitor(sdata); 7377 7378 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7379 * element (which carries the beacon interval). Don't forget to add a 7380 * bit to care_about_ies[] above if mac80211 is interested in a 7381 * changing S1G element. 7382 */ 7383 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7384 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7385 parse_params.bss = bss_conf->bss; 7386 parse_params.filter = care_about_ies; 7387 parse_params.crc = ncrc; 7388 elems = ieee802_11_parse_elems_full(&parse_params); 7389 if (!elems) 7390 return; 7391 7392 if (rx_status->flag & RX_FLAG_DECRYPTED && 7393 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7394 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7395 sdata->vif.cfg.ap_addr); 7396 __ieee80211_disconnect(sdata); 7397 return; 7398 } 7399 7400 ncrc = elems->crc; 7401 7402 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7403 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7404 if (local->hw.conf.dynamic_ps_timeout > 0) { 7405 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7406 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7407 ieee80211_hw_config(local, -1, 7408 IEEE80211_CONF_CHANGE_PS); 7409 } 7410 ieee80211_send_nullfunc(local, sdata, false); 7411 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7412 local->pspolling = true; 7413 7414 /* 7415 * Here is assumed that the driver will be 7416 * able to send ps-poll frame and receive a 7417 * response even though power save mode is 7418 * enabled, but some drivers might require 7419 * to disable power save here. This needs 7420 * to be investigated. 7421 */ 7422 ieee80211_send_pspoll(local, sdata); 7423 } 7424 } 7425 7426 if (sdata->vif.p2p || 7427 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7428 struct ieee80211_p2p_noa_attr noa = {}; 7429 int ret; 7430 7431 ret = cfg80211_get_p2p_attr(variable, 7432 len - baselen, 7433 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7434 (u8 *) &noa, sizeof(noa)); 7435 if (ret >= 2) { 7436 if (link->u.mgd.p2p_noa_index != noa.index) { 7437 /* valid noa_attr and index changed */ 7438 link->u.mgd.p2p_noa_index = noa.index; 7439 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7440 changed |= BSS_CHANGED_P2P_PS; 7441 /* 7442 * make sure we update all information, the CRC 7443 * mechanism doesn't look at P2P attributes. 7444 */ 7445 link->u.mgd.beacon_crc_valid = false; 7446 } 7447 } else if (link->u.mgd.p2p_noa_index != -1) { 7448 /* noa_attr not found and we had valid noa_attr before */ 7449 link->u.mgd.p2p_noa_index = -1; 7450 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7451 changed |= BSS_CHANGED_P2P_PS; 7452 link->u.mgd.beacon_crc_valid = false; 7453 } 7454 } 7455 7456 /* 7457 * Update beacon timing and dtim count on every beacon appearance. This 7458 * will allow the driver to use the most updated values. Do it before 7459 * comparing this one with last received beacon. 7460 * IMPORTANT: These parameters would possibly be out of sync by the time 7461 * the driver will use them. The synchronized view is currently 7462 * guaranteed only in certain callbacks. 7463 */ 7464 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7465 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7466 bss_conf->sync_tsf = 7467 le64_to_cpu(mgmt->u.beacon.timestamp); 7468 bss_conf->sync_device_ts = 7469 rx_status->device_timestamp; 7470 bss_conf->sync_dtim_count = elems->dtim_count; 7471 } 7472 7473 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7474 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7475 parse_params.start, 7476 parse_params.len))) 7477 goto free; 7478 link->u.mgd.beacon_crc = ncrc; 7479 link->u.mgd.beacon_crc_valid = true; 7480 7481 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7482 7483 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7484 rx_status->device_timestamp, 7485 elems, elems, 7486 IEEE80211_CSA_SOURCE_BEACON); 7487 7488 /* note that after this elems->ml_basic can no longer be used fully */ 7489 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7490 7491 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7492 7493 if (!sdata->u.mgd.epcs.enabled && 7494 !link->u.mgd.disable_wmm_tracking && 7495 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7496 elems->wmm_param_len, 7497 elems->mu_edca_param_set)) 7498 changed |= BSS_CHANGED_QOS; 7499 7500 /* 7501 * If we haven't had a beacon before, tell the driver about the 7502 * DTIM period (and beacon timing if desired) now. 7503 */ 7504 if (!link->u.mgd.have_beacon) { 7505 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7506 bss_conf->dtim_period = elems->dtim_period ?: 1; 7507 7508 changed |= BSS_CHANGED_BEACON_INFO; 7509 link->u.mgd.have_beacon = true; 7510 7511 ieee80211_recalc_ps(local); 7512 7513 ieee80211_recalc_ps_vif(sdata); 7514 } 7515 7516 if (elems->erp_info) { 7517 erp_valid = true; 7518 erp_value = elems->erp_info[0]; 7519 } else { 7520 erp_valid = false; 7521 } 7522 7523 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7524 changed |= ieee80211_handle_bss_capability(link, 7525 le16_to_cpu(mgmt->u.beacon.capab_info), 7526 erp_valid, erp_value); 7527 7528 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7529 if (WARN_ON(!sta)) { 7530 goto free; 7531 } 7532 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7533 lockdep_is_held(&local->hw.wiphy->mtx)); 7534 if (WARN_ON(!link_sta)) { 7535 goto free; 7536 } 7537 7538 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7539 goto free; 7540 7541 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7542 7543 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7544 7545 if (ieee80211_config_bw(link, elems, true, &changed, "beacon")) { 7546 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7547 WLAN_REASON_DEAUTH_LEAVING, 7548 true, deauth_buf); 7549 ieee80211_report_disconnect(sdata, deauth_buf, 7550 sizeof(deauth_buf), true, 7551 WLAN_REASON_DEAUTH_LEAVING, 7552 false); 7553 goto free; 7554 } 7555 7556 if (elems->opmode_notif) 7557 ieee80211_vht_handle_opmode(sdata, link_sta, 7558 *elems->opmode_notif, 7559 rx_status->band); 7560 7561 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7562 elems->country_elem, 7563 elems->country_elem_len, 7564 elems->pwr_constr_elem, 7565 elems->cisco_dtpc_elem); 7566 7567 ieee80211_ml_reconfiguration(sdata, elems); 7568 ieee80211_process_adv_ttlm(sdata, elems, 7569 le64_to_cpu(mgmt->u.beacon.timestamp)); 7570 7571 ieee80211_link_info_change_notify(sdata, link, changed); 7572 free: 7573 kfree(elems); 7574 } 7575 7576 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7577 struct ieee80211_neg_ttlm neg_ttlm) 7578 { 7579 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7580 u8 i; 7581 7582 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7583 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7584 7585 /* If there is an active TTLM, unset previously suspended links */ 7586 if (sdata->vif.neg_ttlm.valid) 7587 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7588 7589 /* exclude links that are already disabled by advertised TTLM */ 7590 new_active_links = 7591 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7592 new_suspended_links = 7593 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7594 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7595 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7596 new_dormant_links, new_suspended_links)) 7597 return; 7598 7599 sdata->vif.neg_ttlm = neg_ttlm; 7600 sdata->vif.neg_ttlm.valid = true; 7601 } 7602 7603 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7604 struct wiphy_work *work) 7605 { 7606 struct ieee80211_sub_if_data *sdata = 7607 container_of(work, struct ieee80211_sub_if_data, 7608 u.mgd.neg_ttlm_timeout_work.work); 7609 7610 sdata_info(sdata, 7611 "No negotiated TTLM response from AP, disconnecting.\n"); 7612 7613 __ieee80211_disconnect(sdata); 7614 } 7615 7616 static void 7617 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7618 struct ieee80211_neg_ttlm *neg_ttlm) 7619 { 7620 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7621 7622 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7623 sizeof(neg_ttlm->downlink))) { 7624 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7625 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7626 } else { 7627 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7628 } 7629 7630 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7631 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7632 __le16 map; 7633 7634 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7635 7636 pos = skb_put(skb, len + 2); 7637 *pos++ = WLAN_EID_EXTENSION; 7638 len_pos = pos++; 7639 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7640 *pos++ = direction[i]; 7641 map_ind_pos = pos++; 7642 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7643 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7644 cpu_to_le16(neg_ttlm->uplink[tid]) : 7645 cpu_to_le16(neg_ttlm->downlink[tid]); 7646 if (!map) 7647 continue; 7648 7649 len += 2; 7650 map_ind |= BIT(tid); 7651 skb_put_data(skb, &map, sizeof(map)); 7652 } 7653 7654 *map_ind_pos = map_ind; 7655 *len_pos = len; 7656 7657 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7658 break; 7659 } 7660 } 7661 7662 static void 7663 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7664 struct ieee80211_neg_ttlm *neg_ttlm, 7665 u8 dialog_token) 7666 { 7667 struct ieee80211_local *local = sdata->local; 7668 struct ieee80211_mgmt *mgmt; 7669 struct sk_buff *skb; 7670 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7671 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7672 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7673 7674 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7675 if (!skb) 7676 return; 7677 7678 skb_reserve(skb, local->tx_headroom); 7679 mgmt = skb_put_zero(skb, hdr_len); 7680 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7681 IEEE80211_STYPE_ACTION); 7682 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7683 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7684 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7685 7686 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7687 mgmt->u.action.u.ttlm_req.action_code = 7688 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7689 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7690 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7691 ieee80211_tx_skb(sdata, skb); 7692 } 7693 7694 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7695 struct cfg80211_ttlm_params *params) 7696 { 7697 struct ieee80211_neg_ttlm neg_ttlm = {}; 7698 u8 i; 7699 7700 if (!ieee80211_vif_is_mld(&sdata->vif) || 7701 !(sdata->vif.cfg.mld_capa_op & 7702 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7703 return -EINVAL; 7704 7705 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7706 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7707 (params->ulink[i] & ~sdata->vif.valid_links)) 7708 return -EINVAL; 7709 7710 neg_ttlm.downlink[i] = params->dlink[i]; 7711 neg_ttlm.uplink[i] = params->ulink[i]; 7712 } 7713 7714 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7715 NEG_TTLM_RES_ACCEPT) 7716 return -EINVAL; 7717 7718 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7719 sdata->u.mgd.dialog_token_alloc++; 7720 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7721 sdata->u.mgd.dialog_token_alloc); 7722 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7723 &sdata->u.mgd.neg_ttlm_timeout_work); 7724 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7725 &sdata->u.mgd.neg_ttlm_timeout_work, 7726 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7727 return 0; 7728 } 7729 7730 static void 7731 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7732 enum ieee80211_neg_ttlm_res ttlm_res, 7733 u8 dialog_token, 7734 struct ieee80211_neg_ttlm *neg_ttlm) 7735 { 7736 struct ieee80211_local *local = sdata->local; 7737 struct ieee80211_mgmt *mgmt; 7738 struct sk_buff *skb; 7739 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7740 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7741 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7742 u16 status_code; 7743 7744 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7745 if (!skb) 7746 return; 7747 7748 skb_reserve(skb, local->tx_headroom); 7749 mgmt = skb_put_zero(skb, hdr_len); 7750 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7751 IEEE80211_STYPE_ACTION); 7752 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7753 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7754 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7755 7756 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7757 mgmt->u.action.u.ttlm_res.action_code = 7758 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7759 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7760 switch (ttlm_res) { 7761 default: 7762 WARN_ON(1); 7763 fallthrough; 7764 case NEG_TTLM_RES_REJECT: 7765 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7766 break; 7767 case NEG_TTLM_RES_ACCEPT: 7768 status_code = WLAN_STATUS_SUCCESS; 7769 break; 7770 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7771 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7772 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7773 break; 7774 } 7775 7776 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7777 ieee80211_tx_skb(sdata, skb); 7778 } 7779 7780 static int 7781 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7782 const struct ieee80211_ttlm_elem *ttlm, 7783 struct ieee80211_neg_ttlm *neg_ttlm, 7784 u8 *direction) 7785 { 7786 u8 control, link_map_presence, map_size, tid; 7787 u8 *pos; 7788 7789 /* The element size was already validated in 7790 * ieee80211_tid_to_link_map_size_ok() 7791 */ 7792 pos = (void *)ttlm->optional; 7793 7794 control = ttlm->control; 7795 7796 /* mapping switch time and expected duration fields are not expected 7797 * in case of negotiated TTLM 7798 */ 7799 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7800 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7801 mlme_dbg(sdata, 7802 "Invalid TTLM element in negotiated TTLM request\n"); 7803 return -EINVAL; 7804 } 7805 7806 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7807 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7808 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7809 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7810 } 7811 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7812 return 0; 7813 } 7814 7815 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7816 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7817 *direction != IEEE80211_TTLM_DIRECTION_UP && 7818 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7819 return -EINVAL; 7820 7821 link_map_presence = *pos; 7822 pos++; 7823 7824 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7825 map_size = 1; 7826 else 7827 map_size = 2; 7828 7829 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7830 u16 map; 7831 7832 if (link_map_presence & BIT(tid)) { 7833 map = ieee80211_get_ttlm(map_size, pos); 7834 if (!map) { 7835 mlme_dbg(sdata, 7836 "No active links for TID %d", tid); 7837 return -EINVAL; 7838 } 7839 } else { 7840 map = 0; 7841 } 7842 7843 switch (*direction) { 7844 case IEEE80211_TTLM_DIRECTION_BOTH: 7845 neg_ttlm->downlink[tid] = map; 7846 neg_ttlm->uplink[tid] = map; 7847 break; 7848 case IEEE80211_TTLM_DIRECTION_DOWN: 7849 neg_ttlm->downlink[tid] = map; 7850 break; 7851 case IEEE80211_TTLM_DIRECTION_UP: 7852 neg_ttlm->uplink[tid] = map; 7853 break; 7854 default: 7855 return -EINVAL; 7856 } 7857 pos += map_size; 7858 } 7859 return 0; 7860 } 7861 7862 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7863 struct ieee80211_mgmt *mgmt, size_t len) 7864 { 7865 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7866 size_t ies_len; 7867 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7868 struct ieee802_11_elems *elems = NULL; 7869 struct ieee80211_neg_ttlm neg_ttlm = {}; 7870 7871 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7872 7873 if (!ieee80211_vif_is_mld(&sdata->vif)) 7874 return; 7875 7876 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7877 ies_len = len - offsetof(struct ieee80211_mgmt, 7878 u.action.u.ttlm_req.variable); 7879 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7880 ies_len, true, NULL); 7881 if (!elems) { 7882 ttlm_res = NEG_TTLM_RES_REJECT; 7883 goto out; 7884 } 7885 7886 for (i = 0; i < elems->ttlm_num; i++) { 7887 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7888 &neg_ttlm, &direction[i]) || 7889 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7890 elems->ttlm_num != 1)) { 7891 ttlm_res = NEG_TTLM_RES_REJECT; 7892 goto out; 7893 } 7894 } 7895 7896 if (!elems->ttlm_num || 7897 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7898 ttlm_res = NEG_TTLM_RES_REJECT; 7899 goto out; 7900 } 7901 7902 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7903 if ((neg_ttlm.downlink[i] && 7904 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7905 (neg_ttlm.uplink[i] && 7906 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7907 ttlm_res = NEG_TTLM_RES_REJECT; 7908 goto out; 7909 } 7910 } 7911 7912 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7913 7914 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7915 goto out; 7916 7917 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7918 out: 7919 kfree(elems); 7920 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7921 } 7922 7923 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7924 struct ieee80211_mgmt *mgmt, size_t len) 7925 { 7926 if (!ieee80211_vif_is_mld(&sdata->vif) || 7927 mgmt->u.action.u.ttlm_req.dialog_token != 7928 sdata->u.mgd.dialog_token_alloc) 7929 return; 7930 7931 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7932 &sdata->u.mgd.neg_ttlm_timeout_work); 7933 7934 /* MLD station sends a TID to link mapping request, mainly to handle 7935 * BTM (BSS transition management) request, in which case it needs to 7936 * restrict the active links set. 7937 * In this case it's not expected that the MLD AP will reject the 7938 * negotiated TTLM request. 7939 * This can be better implemented in the future, to handle request 7940 * rejections. 7941 */ 7942 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 7943 __ieee80211_disconnect(sdata); 7944 } 7945 7946 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 7947 { 7948 u16 new_dormant_links; 7949 7950 if (!sdata->vif.neg_ttlm.valid) 7951 return; 7952 7953 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7954 new_dormant_links = 7955 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7956 sdata->vif.suspended_links = 0; 7957 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7958 new_dormant_links); 7959 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7960 BSS_CHANGED_MLD_VALID_LINKS); 7961 } 7962 7963 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7964 struct wiphy_work *work) 7965 { 7966 struct ieee80211_sub_if_data *sdata = 7967 container_of(work, struct ieee80211_sub_if_data, 7968 u.mgd.teardown_ttlm_work); 7969 7970 ieee80211_process_ttlm_teardown(sdata); 7971 } 7972 7973 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7974 { 7975 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7976 struct ieee80211_local *local = sdata->local; 7977 struct ieee80211_mgmt *mgmt; 7978 struct sk_buff *skb; 7979 int frame_len = offsetofend(struct ieee80211_mgmt, 7980 u.action.u.ttlm_tear_down); 7981 struct ieee80211_tx_info *info; 7982 7983 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7984 if (!skb) 7985 return; 7986 7987 skb_reserve(skb, local->hw.extra_tx_headroom); 7988 mgmt = skb_put_zero(skb, frame_len); 7989 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7990 IEEE80211_STYPE_ACTION); 7991 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7992 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7993 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7994 7995 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7996 mgmt->u.action.u.ttlm_tear_down.action_code = 7997 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7998 7999 info = IEEE80211_SKB_CB(skb); 8000 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8001 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8002 ieee80211_tx_skb(sdata, skb); 8003 } 8004 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8005 8006 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8007 struct sk_buff *skb) 8008 { 8009 struct ieee80211_link_data *link = &sdata->deflink; 8010 struct ieee80211_rx_status *rx_status; 8011 struct ieee80211_hdr *hdr; 8012 u16 fc; 8013 8014 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8015 8016 rx_status = (struct ieee80211_rx_status *) skb->cb; 8017 hdr = (struct ieee80211_hdr *) skb->data; 8018 fc = le16_to_cpu(hdr->frame_control); 8019 8020 switch (fc & IEEE80211_FCTL_STYPE) { 8021 case IEEE80211_STYPE_S1G_BEACON: 8022 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8023 break; 8024 } 8025 } 8026 8027 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8028 struct sk_buff *skb) 8029 { 8030 struct ieee80211_link_data *link = &sdata->deflink; 8031 struct ieee80211_rx_status *rx_status; 8032 struct ieee802_11_elems *elems; 8033 struct ieee80211_mgmt *mgmt; 8034 u16 fc; 8035 int ies_len; 8036 8037 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8038 8039 rx_status = (struct ieee80211_rx_status *) skb->cb; 8040 mgmt = (struct ieee80211_mgmt *) skb->data; 8041 fc = le16_to_cpu(mgmt->frame_control); 8042 8043 if (rx_status->link_valid) { 8044 link = sdata_dereference(sdata->link[rx_status->link_id], 8045 sdata); 8046 if (!link) 8047 return; 8048 } 8049 8050 switch (fc & IEEE80211_FCTL_STYPE) { 8051 case IEEE80211_STYPE_BEACON: 8052 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8053 skb->len, rx_status); 8054 break; 8055 case IEEE80211_STYPE_PROBE_RESP: 8056 ieee80211_rx_mgmt_probe_resp(link, skb); 8057 break; 8058 case IEEE80211_STYPE_AUTH: 8059 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8060 break; 8061 case IEEE80211_STYPE_DEAUTH: 8062 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8063 break; 8064 case IEEE80211_STYPE_DISASSOC: 8065 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8066 break; 8067 case IEEE80211_STYPE_ASSOC_RESP: 8068 case IEEE80211_STYPE_REASSOC_RESP: 8069 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8070 break; 8071 case IEEE80211_STYPE_ACTION: 8072 if (!sdata->u.mgd.associated || 8073 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8074 break; 8075 8076 switch (mgmt->u.action.category) { 8077 case WLAN_CATEGORY_SPECTRUM_MGMT: 8078 ies_len = skb->len - 8079 offsetof(struct ieee80211_mgmt, 8080 u.action.u.chan_switch.variable); 8081 8082 if (ies_len < 0) 8083 break; 8084 8085 /* CSA IE cannot be overridden, no need for BSSID */ 8086 elems = ieee802_11_parse_elems( 8087 mgmt->u.action.u.chan_switch.variable, 8088 ies_len, true, NULL); 8089 8090 if (elems && !elems->parse_error) { 8091 enum ieee80211_csa_source src = 8092 IEEE80211_CSA_SOURCE_PROT_ACTION; 8093 8094 ieee80211_sta_process_chanswitch(link, 8095 rx_status->mactime, 8096 rx_status->device_timestamp, 8097 elems, elems, 8098 src); 8099 } 8100 kfree(elems); 8101 break; 8102 case WLAN_CATEGORY_PUBLIC: 8103 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8104 ies_len = skb->len - 8105 offsetof(struct ieee80211_mgmt, 8106 u.action.u.ext_chan_switch.variable); 8107 8108 if (ies_len < 0) 8109 break; 8110 8111 /* 8112 * extended CSA IE can't be overridden, no need for 8113 * BSSID 8114 */ 8115 elems = ieee802_11_parse_elems( 8116 mgmt->u.action.u.ext_chan_switch.variable, 8117 ies_len, true, NULL); 8118 8119 if (elems && !elems->parse_error) { 8120 enum ieee80211_csa_source src; 8121 8122 if (mgmt->u.action.category == 8123 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8124 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8125 else 8126 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8127 8128 /* for the handling code pretend it was an IE */ 8129 elems->ext_chansw_ie = 8130 &mgmt->u.action.u.ext_chan_switch.data; 8131 8132 ieee80211_sta_process_chanswitch(link, 8133 rx_status->mactime, 8134 rx_status->device_timestamp, 8135 elems, elems, 8136 src); 8137 } 8138 8139 kfree(elems); 8140 break; 8141 } 8142 break; 8143 } 8144 } 8145 8146 static void ieee80211_sta_timer(struct timer_list *t) 8147 { 8148 struct ieee80211_sub_if_data *sdata = 8149 timer_container_of(sdata, t, u.mgd.timer); 8150 8151 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8152 } 8153 8154 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8155 u8 reason, bool tx) 8156 { 8157 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8158 8159 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8160 tx, frame_buf); 8161 8162 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8163 reason, false); 8164 } 8165 8166 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8167 { 8168 struct ieee80211_local *local = sdata->local; 8169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8170 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8171 u32 tx_flags = 0; 8172 u16 trans = 1; 8173 u16 status = 0; 8174 struct ieee80211_prep_tx_info info = { 8175 .subtype = IEEE80211_STYPE_AUTH, 8176 }; 8177 8178 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8179 8180 if (WARN_ON_ONCE(!auth_data)) 8181 return -EINVAL; 8182 8183 auth_data->tries++; 8184 8185 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8186 sdata_info(sdata, "authentication with %pM timed out\n", 8187 auth_data->ap_addr); 8188 8189 /* 8190 * Most likely AP is not in the range so remove the 8191 * bss struct for that AP. 8192 */ 8193 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8194 8195 return -ETIMEDOUT; 8196 } 8197 8198 if (auth_data->algorithm == WLAN_AUTH_SAE) 8199 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8200 8201 info.link_id = auth_data->link_id; 8202 drv_mgd_prepare_tx(local, sdata, &info); 8203 8204 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8205 auth_data->ap_addr, auth_data->tries, 8206 IEEE80211_AUTH_MAX_TRIES); 8207 8208 auth_data->expected_transaction = 2; 8209 8210 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8211 trans = auth_data->sae_trans; 8212 status = auth_data->sae_status; 8213 auth_data->expected_transaction = trans; 8214 } 8215 8216 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8217 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8218 IEEE80211_TX_INTFL_MLME_CONN_TX; 8219 8220 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8221 auth_data->data, auth_data->data_len, 8222 auth_data->ap_addr, auth_data->ap_addr, 8223 NULL, 0, 0, tx_flags); 8224 8225 if (tx_flags == 0) { 8226 if (auth_data->algorithm == WLAN_AUTH_SAE) 8227 auth_data->timeout = jiffies + 8228 IEEE80211_AUTH_TIMEOUT_SAE; 8229 else 8230 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8231 } else { 8232 auth_data->timeout = 8233 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8234 } 8235 8236 auth_data->timeout_started = true; 8237 run_again(sdata, auth_data->timeout); 8238 8239 return 0; 8240 } 8241 8242 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8243 { 8244 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8245 struct ieee80211_local *local = sdata->local; 8246 int ret; 8247 8248 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8249 8250 assoc_data->tries++; 8251 assoc_data->comeback = false; 8252 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8253 sdata_info(sdata, "association with %pM timed out\n", 8254 assoc_data->ap_addr); 8255 8256 /* 8257 * Most likely AP is not in the range so remove the 8258 * bss struct for that AP. 8259 */ 8260 cfg80211_unlink_bss(local->hw.wiphy, 8261 assoc_data->link[assoc_data->assoc_link_id].bss); 8262 8263 return -ETIMEDOUT; 8264 } 8265 8266 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8267 assoc_data->ap_addr, assoc_data->tries, 8268 IEEE80211_ASSOC_MAX_TRIES); 8269 ret = ieee80211_send_assoc(sdata); 8270 if (ret) 8271 return ret; 8272 8273 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8274 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8275 assoc_data->timeout_started = true; 8276 run_again(sdata, assoc_data->timeout); 8277 } else { 8278 assoc_data->timeout = 8279 round_jiffies_up(jiffies + 8280 IEEE80211_ASSOC_TIMEOUT_LONG); 8281 assoc_data->timeout_started = true; 8282 run_again(sdata, assoc_data->timeout); 8283 } 8284 8285 return 0; 8286 } 8287 8288 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8289 __le16 fc, bool acked) 8290 { 8291 struct ieee80211_local *local = sdata->local; 8292 8293 sdata->u.mgd.status_fc = fc; 8294 sdata->u.mgd.status_acked = acked; 8295 sdata->u.mgd.status_received = true; 8296 8297 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8298 } 8299 8300 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8301 { 8302 struct ieee80211_local *local = sdata->local; 8303 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8304 8305 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8306 8307 if (ifmgd->status_received) { 8308 __le16 fc = ifmgd->status_fc; 8309 bool status_acked = ifmgd->status_acked; 8310 8311 ifmgd->status_received = false; 8312 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8313 if (status_acked) { 8314 if (ifmgd->auth_data->algorithm == 8315 WLAN_AUTH_SAE) 8316 ifmgd->auth_data->timeout = 8317 jiffies + 8318 IEEE80211_AUTH_TIMEOUT_SAE; 8319 else 8320 ifmgd->auth_data->timeout = 8321 jiffies + 8322 IEEE80211_AUTH_TIMEOUT_SHORT; 8323 run_again(sdata, ifmgd->auth_data->timeout); 8324 } else { 8325 ifmgd->auth_data->timeout = jiffies - 1; 8326 } 8327 ifmgd->auth_data->timeout_started = true; 8328 } else if (ifmgd->assoc_data && 8329 !ifmgd->assoc_data->comeback && 8330 (ieee80211_is_assoc_req(fc) || 8331 ieee80211_is_reassoc_req(fc))) { 8332 /* 8333 * Update association timeout based on the TX status 8334 * for the (Re)Association Request frame. Skip this if 8335 * we have already processed a (Re)Association Response 8336 * frame that indicated need for association comeback 8337 * at a specific time in the future. This could happen 8338 * if the TX status information is delayed enough for 8339 * the response to be received and processed first. 8340 */ 8341 if (status_acked) { 8342 ifmgd->assoc_data->timeout = 8343 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8344 run_again(sdata, ifmgd->assoc_data->timeout); 8345 } else { 8346 ifmgd->assoc_data->timeout = jiffies - 1; 8347 } 8348 ifmgd->assoc_data->timeout_started = true; 8349 } 8350 } 8351 8352 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8353 time_after(jiffies, ifmgd->auth_data->timeout)) { 8354 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8355 /* 8356 * ok ... we waited for assoc or continuation but 8357 * userspace didn't do it, so kill the auth data 8358 */ 8359 ieee80211_destroy_auth_data(sdata, false); 8360 } else if (ieee80211_auth(sdata)) { 8361 u8 ap_addr[ETH_ALEN]; 8362 struct ieee80211_event event = { 8363 .type = MLME_EVENT, 8364 .u.mlme.data = AUTH_EVENT, 8365 .u.mlme.status = MLME_TIMEOUT, 8366 }; 8367 8368 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8369 8370 ieee80211_destroy_auth_data(sdata, false); 8371 8372 cfg80211_auth_timeout(sdata->dev, ap_addr); 8373 drv_event_callback(sdata->local, sdata, &event); 8374 } 8375 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8376 run_again(sdata, ifmgd->auth_data->timeout); 8377 8378 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8379 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8380 if ((ifmgd->assoc_data->need_beacon && 8381 !sdata->deflink.u.mgd.have_beacon) || 8382 ieee80211_do_assoc(sdata)) { 8383 struct ieee80211_event event = { 8384 .type = MLME_EVENT, 8385 .u.mlme.data = ASSOC_EVENT, 8386 .u.mlme.status = MLME_TIMEOUT, 8387 }; 8388 8389 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8390 drv_event_callback(sdata->local, sdata, &event); 8391 } 8392 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8393 run_again(sdata, ifmgd->assoc_data->timeout); 8394 8395 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8396 ifmgd->associated) { 8397 u8 *bssid = sdata->deflink.u.mgd.bssid; 8398 int max_tries; 8399 8400 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8401 max_tries = max_nullfunc_tries; 8402 else 8403 max_tries = max_probe_tries; 8404 8405 /* ACK received for nullfunc probing frame */ 8406 if (!ifmgd->probe_send_count) 8407 ieee80211_reset_ap_probe(sdata); 8408 else if (ifmgd->nullfunc_failed) { 8409 if (ifmgd->probe_send_count < max_tries) { 8410 mlme_dbg(sdata, 8411 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8412 bssid, ifmgd->probe_send_count, 8413 max_tries); 8414 ieee80211_mgd_probe_ap_send(sdata); 8415 } else { 8416 mlme_dbg(sdata, 8417 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8418 bssid); 8419 ieee80211_sta_connection_lost(sdata, 8420 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8421 false); 8422 } 8423 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8424 run_again(sdata, ifmgd->probe_timeout); 8425 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8426 mlme_dbg(sdata, 8427 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8428 bssid, probe_wait_ms); 8429 ieee80211_sta_connection_lost(sdata, 8430 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8431 } else if (ifmgd->probe_send_count < max_tries) { 8432 mlme_dbg(sdata, 8433 "No probe response from AP %pM after %dms, try %d/%i\n", 8434 bssid, probe_wait_ms, 8435 ifmgd->probe_send_count, max_tries); 8436 ieee80211_mgd_probe_ap_send(sdata); 8437 } else { 8438 /* 8439 * We actually lost the connection ... or did we? 8440 * Let's make sure! 8441 */ 8442 mlme_dbg(sdata, 8443 "No probe response from AP %pM after %dms, disconnecting.\n", 8444 bssid, probe_wait_ms); 8445 8446 ieee80211_sta_connection_lost(sdata, 8447 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8448 } 8449 } 8450 } 8451 8452 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8453 { 8454 struct ieee80211_sub_if_data *sdata = 8455 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8456 8457 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8458 return; 8459 8460 if (sdata->vif.bss_conf.csa_active && 8461 !sdata->deflink.u.mgd.csa.waiting_bcn) 8462 return; 8463 8464 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8465 return; 8466 8467 sdata->u.mgd.connection_loss = false; 8468 wiphy_work_queue(sdata->local->hw.wiphy, 8469 &sdata->u.mgd.beacon_connection_loss_work); 8470 } 8471 8472 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8473 { 8474 struct ieee80211_sub_if_data *sdata = 8475 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8476 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8477 struct ieee80211_local *local = sdata->local; 8478 struct sta_info *sta; 8479 unsigned long timeout; 8480 8481 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8482 return; 8483 8484 if (sdata->vif.bss_conf.csa_active && 8485 !sdata->deflink.u.mgd.csa.waiting_bcn) 8486 return; 8487 8488 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8489 if (!sta) 8490 return; 8491 8492 timeout = sta->deflink.status_stats.last_ack; 8493 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8494 timeout = sta->deflink.rx_stats.last_rx; 8495 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8496 8497 /* If timeout is after now, then update timer to fire at 8498 * the later date, but do not actually probe at this time. 8499 */ 8500 if (time_is_after_jiffies(timeout)) { 8501 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8502 return; 8503 } 8504 8505 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8506 } 8507 8508 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8509 struct wiphy_work *work) 8510 { 8511 struct ieee80211_sub_if_data *sdata = 8512 container_of(work, struct ieee80211_sub_if_data, 8513 u.mgd.monitor_work); 8514 8515 ieee80211_mgd_probe_ap(sdata, false); 8516 } 8517 8518 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8519 { 8520 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8521 __ieee80211_stop_poll(sdata); 8522 8523 /* let's probe the connection once */ 8524 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8525 wiphy_work_queue(sdata->local->hw.wiphy, 8526 &sdata->u.mgd.monitor_work); 8527 } 8528 } 8529 8530 #ifdef CONFIG_PM 8531 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8532 { 8533 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8534 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8535 8536 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8537 8538 if (ifmgd->auth_data || ifmgd->assoc_data) { 8539 const u8 *ap_addr = ifmgd->auth_data ? 8540 ifmgd->auth_data->ap_addr : 8541 ifmgd->assoc_data->ap_addr; 8542 8543 /* 8544 * If we are trying to authenticate / associate while suspending, 8545 * cfg80211 won't know and won't actually abort those attempts, 8546 * thus we need to do that ourselves. 8547 */ 8548 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8549 IEEE80211_STYPE_DEAUTH, 8550 WLAN_REASON_DEAUTH_LEAVING, 8551 false, frame_buf); 8552 if (ifmgd->assoc_data) 8553 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8554 if (ifmgd->auth_data) 8555 ieee80211_destroy_auth_data(sdata, false); 8556 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8557 IEEE80211_DEAUTH_FRAME_LEN, 8558 false); 8559 } 8560 8561 /* This is a bit of a hack - we should find a better and more generic 8562 * solution to this. Normally when suspending, cfg80211 will in fact 8563 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8564 * auth (not so important) or assoc (this is the problem) process. 8565 * 8566 * As a consequence, it can happen that we are in the process of both 8567 * associating and suspending, and receive an association response 8568 * after cfg80211 has checked if it needs to disconnect, but before 8569 * we actually set the flag to drop incoming frames. This will then 8570 * cause the workqueue flush to process the association response in 8571 * the suspend, resulting in a successful association just before it 8572 * tries to remove the interface from the driver, which now though 8573 * has a channel context assigned ... this results in issues. 8574 * 8575 * To work around this (for now) simply deauth here again if we're 8576 * now connected. 8577 */ 8578 if (ifmgd->associated && !sdata->local->wowlan) { 8579 u8 bssid[ETH_ALEN]; 8580 struct cfg80211_deauth_request req = { 8581 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8582 .bssid = bssid, 8583 }; 8584 8585 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8586 ieee80211_mgd_deauth(sdata, &req); 8587 } 8588 } 8589 #endif 8590 8591 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8592 { 8593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8594 8595 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8596 8597 if (!ifmgd->associated) 8598 return; 8599 8600 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8601 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8602 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8603 ieee80211_sta_connection_lost(sdata, 8604 WLAN_REASON_UNSPECIFIED, 8605 true); 8606 return; 8607 } 8608 8609 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8610 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8611 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8612 ieee80211_sta_connection_lost(sdata, 8613 WLAN_REASON_UNSPECIFIED, 8614 true); 8615 return; 8616 } 8617 } 8618 8619 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8620 struct wiphy_work *work) 8621 { 8622 struct ieee80211_link_data *link = 8623 container_of(work, struct ieee80211_link_data, 8624 u.mgd.request_smps_work); 8625 8626 __ieee80211_request_smps_mgd(link->sdata, link, 8627 link->u.mgd.driver_smps_mode); 8628 } 8629 8630 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8631 struct wiphy_work *work) 8632 { 8633 struct ieee80211_sub_if_data *sdata = 8634 container_of(work, struct ieee80211_sub_if_data, 8635 u.mgd.reconf.wk.work); 8636 8637 if (!sdata->u.mgd.reconf.added_links && 8638 !sdata->u.mgd.reconf.removed_links) 8639 return; 8640 8641 sdata_info(sdata, 8642 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8643 sdata->u.mgd.reconf.added_links, 8644 sdata->u.mgd.reconf.removed_links); 8645 8646 __ieee80211_disconnect(sdata); 8647 } 8648 8649 /* interface setup */ 8650 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8651 { 8652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8653 8654 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8655 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8656 ieee80211_beacon_connection_loss_work); 8657 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8658 ieee80211_csa_connection_drop_work); 8659 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8660 ieee80211_tdls_peer_del_work); 8661 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8662 ieee80211_ml_reconf_work); 8663 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8664 ieee80211_ml_sta_reconf_timeout); 8665 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8666 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8667 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8668 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8669 ieee80211_sta_handle_tspec_ac_params_wk); 8670 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8671 ieee80211_tid_to_link_map_work); 8672 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8673 ieee80211_neg_ttlm_timeout_work); 8674 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8675 ieee80211_teardown_ttlm_work); 8676 8677 ifmgd->flags = 0; 8678 ifmgd->powersave = sdata->wdev.ps; 8679 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8680 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8681 /* Setup TDLS data */ 8682 spin_lock_init(&ifmgd->teardown_lock); 8683 ifmgd->teardown_skb = NULL; 8684 ifmgd->orig_teardown_skb = NULL; 8685 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8686 } 8687 8688 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8689 struct wiphy_work *work) 8690 { 8691 struct ieee80211_link_data *link = 8692 container_of(work, struct ieee80211_link_data, 8693 u.mgd.recalc_smps); 8694 8695 ieee80211_recalc_smps(link->sdata, link); 8696 } 8697 8698 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8699 { 8700 struct ieee80211_sub_if_data *sdata = link->sdata; 8701 struct ieee80211_local *local = sdata->local; 8702 unsigned int link_id = link->link_id; 8703 8704 link->u.mgd.p2p_noa_index = -1; 8705 link->conf->bssid = link->u.mgd.bssid; 8706 link->smps_mode = IEEE80211_SMPS_OFF; 8707 8708 wiphy_work_init(&link->u.mgd.request_smps_work, 8709 ieee80211_request_smps_mgd_work); 8710 wiphy_work_init(&link->u.mgd.recalc_smps, 8711 ieee80211_recalc_smps_work); 8712 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8713 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8714 else 8715 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8716 8717 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8718 ieee80211_csa_switch_work); 8719 8720 ieee80211_clear_tpe(&link->conf->tpe); 8721 8722 if (sdata->u.mgd.assoc_data) 8723 ether_addr_copy(link->conf->addr, 8724 sdata->u.mgd.assoc_data->link[link_id].addr); 8725 else if (sdata->u.mgd.reconf.add_links_data) 8726 ether_addr_copy(link->conf->addr, 8727 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8728 else if (!is_valid_ether_addr(link->conf->addr)) 8729 eth_random_addr(link->conf->addr); 8730 } 8731 8732 /* scan finished notification */ 8733 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8734 { 8735 struct ieee80211_sub_if_data *sdata; 8736 8737 /* Restart STA timers */ 8738 rcu_read_lock(); 8739 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8740 if (ieee80211_sdata_running(sdata)) 8741 ieee80211_restart_sta_timer(sdata); 8742 } 8743 rcu_read_unlock(); 8744 } 8745 8746 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8747 struct cfg80211_bss *cbss, s8 link_id, 8748 const u8 *ap_mld_addr, bool assoc, 8749 struct ieee80211_conn_settings *conn, 8750 bool override, 8751 unsigned long *userspace_selectors) 8752 { 8753 struct ieee80211_local *local = sdata->local; 8754 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8755 struct ieee80211_bss *bss = (void *)cbss->priv; 8756 struct sta_info *new_sta = NULL; 8757 struct ieee80211_link_data *link; 8758 bool have_sta = false; 8759 bool mlo; 8760 int err; 8761 u16 new_links; 8762 8763 if (link_id >= 0) { 8764 mlo = true; 8765 if (WARN_ON(!ap_mld_addr)) 8766 return -EINVAL; 8767 new_links = BIT(link_id); 8768 } else { 8769 if (WARN_ON(ap_mld_addr)) 8770 return -EINVAL; 8771 ap_mld_addr = cbss->bssid; 8772 new_links = 0; 8773 link_id = 0; 8774 mlo = false; 8775 } 8776 8777 if (assoc) { 8778 rcu_read_lock(); 8779 have_sta = sta_info_get(sdata, ap_mld_addr); 8780 rcu_read_unlock(); 8781 } 8782 8783 if (mlo && !have_sta && 8784 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8785 return -EINVAL; 8786 8787 err = ieee80211_vif_set_links(sdata, new_links, 0); 8788 if (err) 8789 return err; 8790 8791 link = sdata_dereference(sdata->link[link_id], sdata); 8792 if (WARN_ON(!link)) { 8793 err = -ENOLINK; 8794 goto out_err; 8795 } 8796 8797 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8798 err = -EINVAL; 8799 goto out_err; 8800 } 8801 8802 /* If a reconfig is happening, bail out */ 8803 if (local->in_reconfig) { 8804 err = -EBUSY; 8805 goto out_err; 8806 } 8807 8808 if (!have_sta) { 8809 if (mlo) 8810 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8811 link_id, cbss->bssid, 8812 GFP_KERNEL); 8813 else 8814 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8815 8816 if (!new_sta) { 8817 err = -ENOMEM; 8818 goto out_err; 8819 } 8820 8821 new_sta->sta.mlo = mlo; 8822 } 8823 8824 /* 8825 * Set up the information for the new channel before setting the 8826 * new channel. We can't - completely race-free - change the basic 8827 * rates bitmap and the channel (sband) that it refers to, but if 8828 * we set it up before we at least avoid calling into the driver's 8829 * bss_info_changed() method with invalid information (since we do 8830 * call that from changing the channel - only for IDLE and perhaps 8831 * some others, but ...). 8832 * 8833 * So to avoid that, just set up all the new information before the 8834 * channel, but tell the driver to apply it only afterwards, since 8835 * it might need the new channel for that. 8836 */ 8837 if (new_sta) { 8838 const struct cfg80211_bss_ies *ies; 8839 struct link_sta_info *link_sta; 8840 8841 rcu_read_lock(); 8842 link_sta = rcu_dereference(new_sta->link[link_id]); 8843 if (WARN_ON(!link_sta)) { 8844 rcu_read_unlock(); 8845 sta_info_free(local, new_sta); 8846 err = -EINVAL; 8847 goto out_err; 8848 } 8849 8850 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8851 link_sta, cbss); 8852 if (err) { 8853 rcu_read_unlock(); 8854 sta_info_free(local, new_sta); 8855 goto out_err; 8856 } 8857 8858 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8859 8860 /* set timing information */ 8861 link->conf->beacon_int = cbss->beacon_interval; 8862 ies = rcu_dereference(cbss->beacon_ies); 8863 if (ies) { 8864 link->conf->sync_tsf = ies->tsf; 8865 link->conf->sync_device_ts = 8866 bss->device_ts_beacon; 8867 8868 ieee80211_get_dtim(ies, 8869 &link->conf->sync_dtim_count, 8870 NULL); 8871 } else if (!ieee80211_hw_check(&sdata->local->hw, 8872 TIMING_BEACON_ONLY)) { 8873 ies = rcu_dereference(cbss->proberesp_ies); 8874 /* must be non-NULL since beacon IEs were NULL */ 8875 link->conf->sync_tsf = ies->tsf; 8876 link->conf->sync_device_ts = 8877 bss->device_ts_presp; 8878 link->conf->sync_dtim_count = 0; 8879 } else { 8880 link->conf->sync_tsf = 0; 8881 link->conf->sync_device_ts = 0; 8882 link->conf->sync_dtim_count = 0; 8883 } 8884 rcu_read_unlock(); 8885 } 8886 8887 if (new_sta || override) { 8888 /* 8889 * Only set this if we're also going to calculate the AP 8890 * settings etc., otherwise this was set before in a 8891 * previous call. Note override is set to %true in assoc 8892 * if the settings were changed. 8893 */ 8894 link->u.mgd.conn = *conn; 8895 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8896 mlo, &link->u.mgd.conn, 8897 userspace_selectors); 8898 if (err) { 8899 if (new_sta) 8900 sta_info_free(local, new_sta); 8901 goto out_err; 8902 } 8903 /* pass out for use in assoc */ 8904 *conn = link->u.mgd.conn; 8905 } 8906 8907 if (new_sta) { 8908 /* 8909 * tell driver about BSSID, basic rates and timing 8910 * this was set up above, before setting the channel 8911 */ 8912 ieee80211_link_info_change_notify(sdata, link, 8913 BSS_CHANGED_BSSID | 8914 BSS_CHANGED_BASIC_RATES | 8915 BSS_CHANGED_BEACON_INT); 8916 8917 if (assoc) 8918 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8919 8920 err = sta_info_insert(new_sta); 8921 new_sta = NULL; 8922 if (err) { 8923 sdata_info(sdata, 8924 "failed to insert STA entry for the AP (error %d)\n", 8925 err); 8926 goto out_release_chan; 8927 } 8928 } else 8929 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8930 8931 /* Cancel scan to ensure that nothing interferes with connection */ 8932 if (local->scanning) 8933 ieee80211_scan_cancel(local); 8934 8935 return 0; 8936 8937 out_release_chan: 8938 ieee80211_link_release_channel(link); 8939 out_err: 8940 ieee80211_vif_set_links(sdata, 0, 0); 8941 return err; 8942 } 8943 8944 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8945 const struct cfg80211_bss_ies *ies, 8946 u8 cur_channel, bool ignore_ecsa) 8947 { 8948 const struct element *csa_elem, *ecsa_elem; 8949 struct ieee80211_channel_sw_ie *csa = NULL; 8950 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8951 8952 if (!ies) 8953 return false; 8954 8955 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8956 ies->data, ies->len); 8957 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8958 csa = (void *)csa_elem->data; 8959 8960 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8961 ies->data, ies->len); 8962 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8963 ecsa = (void *)ecsa_elem->data; 8964 8965 if (csa && csa->count == 0) 8966 csa = NULL; 8967 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8968 csa = NULL; 8969 8970 if (ecsa && ecsa->count == 0) 8971 ecsa = NULL; 8972 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8973 ecsa = NULL; 8974 8975 if (ignore_ecsa && ecsa) { 8976 sdata_info(sdata, 8977 "Ignoring ECSA in probe response - was considered stuck!\n"); 8978 return csa; 8979 } 8980 8981 return csa || ecsa; 8982 } 8983 8984 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8985 struct cfg80211_bss *bss) 8986 { 8987 u8 cur_channel; 8988 bool ret; 8989 8990 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8991 8992 rcu_read_lock(); 8993 if (ieee80211_mgd_csa_present(sdata, 8994 rcu_dereference(bss->beacon_ies), 8995 cur_channel, false)) { 8996 ret = true; 8997 goto out; 8998 } 8999 9000 if (ieee80211_mgd_csa_present(sdata, 9001 rcu_dereference(bss->proberesp_ies), 9002 cur_channel, bss->proberesp_ecsa_stuck)) { 9003 ret = true; 9004 goto out; 9005 } 9006 9007 ret = false; 9008 out: 9009 rcu_read_unlock(); 9010 return ret; 9011 } 9012 9013 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9014 const u8 *supported_selectors, 9015 u8 supported_selectors_len) 9016 { 9017 if (supported_selectors) { 9018 for (int i = 0; i < supported_selectors_len; i++) { 9019 set_bit(supported_selectors[i], 9020 userspace_selectors); 9021 } 9022 } else { 9023 /* Assume SAE_H2E support for backward compatibility. */ 9024 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9025 userspace_selectors); 9026 } 9027 } 9028 9029 /* config hooks */ 9030 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9031 struct cfg80211_auth_request *req) 9032 { 9033 struct ieee80211_local *local = sdata->local; 9034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9035 struct ieee80211_mgd_auth_data *auth_data; 9036 struct ieee80211_conn_settings conn; 9037 struct ieee80211_link_data *link; 9038 struct ieee80211_supported_band *sband; 9039 struct ieee80211_bss *bss; 9040 u16 auth_alg; 9041 int err; 9042 bool cont_auth, wmm_used; 9043 9044 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9045 9046 /* prepare auth data structure */ 9047 9048 switch (req->auth_type) { 9049 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9050 auth_alg = WLAN_AUTH_OPEN; 9051 break; 9052 case NL80211_AUTHTYPE_SHARED_KEY: 9053 if (fips_enabled) 9054 return -EOPNOTSUPP; 9055 auth_alg = WLAN_AUTH_SHARED_KEY; 9056 break; 9057 case NL80211_AUTHTYPE_FT: 9058 auth_alg = WLAN_AUTH_FT; 9059 break; 9060 case NL80211_AUTHTYPE_NETWORK_EAP: 9061 auth_alg = WLAN_AUTH_LEAP; 9062 break; 9063 case NL80211_AUTHTYPE_SAE: 9064 auth_alg = WLAN_AUTH_SAE; 9065 break; 9066 case NL80211_AUTHTYPE_FILS_SK: 9067 auth_alg = WLAN_AUTH_FILS_SK; 9068 break; 9069 case NL80211_AUTHTYPE_FILS_SK_PFS: 9070 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9071 break; 9072 case NL80211_AUTHTYPE_FILS_PK: 9073 auth_alg = WLAN_AUTH_FILS_PK; 9074 break; 9075 default: 9076 return -EOPNOTSUPP; 9077 } 9078 9079 if (ifmgd->assoc_data) 9080 return -EBUSY; 9081 9082 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9083 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9084 return -EINVAL; 9085 } 9086 9087 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9088 req->ie_len, GFP_KERNEL); 9089 if (!auth_data) 9090 return -ENOMEM; 9091 9092 memcpy(auth_data->ap_addr, 9093 req->ap_mld_addr ?: req->bss->bssid, 9094 ETH_ALEN); 9095 auth_data->bss = req->bss; 9096 auth_data->link_id = req->link_id; 9097 9098 if (req->auth_data_len >= 4) { 9099 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9100 __le16 *pos = (__le16 *) req->auth_data; 9101 9102 auth_data->sae_trans = le16_to_cpu(pos[0]); 9103 auth_data->sae_status = le16_to_cpu(pos[1]); 9104 } 9105 memcpy(auth_data->data, req->auth_data + 4, 9106 req->auth_data_len - 4); 9107 auth_data->data_len += req->auth_data_len - 4; 9108 } 9109 9110 /* Check if continuing authentication or trying to authenticate with the 9111 * same BSS that we were in the process of authenticating with and avoid 9112 * removal and re-addition of the STA entry in 9113 * ieee80211_prep_connection(). 9114 */ 9115 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9116 ifmgd->auth_data->link_id == req->link_id; 9117 9118 if (req->ie && req->ie_len) { 9119 memcpy(&auth_data->data[auth_data->data_len], 9120 req->ie, req->ie_len); 9121 auth_data->data_len += req->ie_len; 9122 } 9123 9124 if (req->key && req->key_len) { 9125 auth_data->key_len = req->key_len; 9126 auth_data->key_idx = req->key_idx; 9127 memcpy(auth_data->key, req->key, req->key_len); 9128 } 9129 9130 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9131 req->supported_selectors, 9132 req->supported_selectors_len); 9133 9134 auth_data->algorithm = auth_alg; 9135 9136 /* try to authenticate/probe */ 9137 9138 if (ifmgd->auth_data) { 9139 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9140 auth_data->peer_confirmed = 9141 ifmgd->auth_data->peer_confirmed; 9142 } 9143 ieee80211_destroy_auth_data(sdata, cont_auth); 9144 } 9145 9146 /* prep auth_data so we don't go into idle on disassoc */ 9147 ifmgd->auth_data = auth_data; 9148 9149 /* If this is continuation of an ongoing SAE authentication exchange 9150 * (i.e., request to send SAE Confirm) and the peer has already 9151 * confirmed, mark authentication completed since we are about to send 9152 * out SAE Confirm. 9153 */ 9154 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9155 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9156 ieee80211_mark_sta_auth(sdata); 9157 9158 if (ifmgd->associated) { 9159 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9160 9161 sdata_info(sdata, 9162 "disconnect from AP %pM for new auth to %pM\n", 9163 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9164 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9165 WLAN_REASON_UNSPECIFIED, 9166 false, frame_buf); 9167 9168 ieee80211_report_disconnect(sdata, frame_buf, 9169 sizeof(frame_buf), true, 9170 WLAN_REASON_UNSPECIFIED, 9171 false); 9172 } 9173 9174 /* needed for transmitting the auth frame(s) properly */ 9175 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9176 9177 bss = (void *)req->bss->priv; 9178 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9179 9180 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9181 9182 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9183 &conn); 9184 9185 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9186 req->ap_mld_addr, cont_auth, 9187 &conn, false, 9188 auth_data->userspace_selectors); 9189 if (err) 9190 goto err_clear; 9191 9192 if (req->link_id >= 0) 9193 link = sdata_dereference(sdata->link[req->link_id], sdata); 9194 else 9195 link = &sdata->deflink; 9196 9197 if (WARN_ON(!link)) { 9198 err = -ENOLINK; 9199 goto err_clear; 9200 } 9201 9202 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9203 auth_data->ap_addr, link->conf->addr); 9204 9205 err = ieee80211_auth(sdata); 9206 if (err) { 9207 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9208 goto err_clear; 9209 } 9210 9211 /* hold our own reference */ 9212 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9213 return 0; 9214 9215 err_clear: 9216 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9217 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9218 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9219 BSS_CHANGED_BSSID); 9220 ieee80211_link_release_channel(&sdata->deflink); 9221 } 9222 ifmgd->auth_data = NULL; 9223 kfree(auth_data); 9224 return err; 9225 } 9226 9227 static void 9228 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9229 struct ieee80211_mgd_assoc_data *assoc_data, 9230 struct cfg80211_assoc_request *req, 9231 struct ieee80211_conn_settings *conn, 9232 unsigned int link_id) 9233 { 9234 struct ieee80211_local *local = sdata->local; 9235 const struct cfg80211_bss_ies *bss_ies; 9236 struct ieee80211_supported_band *sband; 9237 struct ieee80211_link_data *link; 9238 struct cfg80211_bss *cbss; 9239 struct ieee80211_bss *bss; 9240 9241 cbss = assoc_data->link[link_id].bss; 9242 if (WARN_ON(!cbss)) 9243 return; 9244 9245 bss = (void *)cbss->priv; 9246 9247 sband = local->hw.wiphy->bands[cbss->channel->band]; 9248 if (WARN_ON(!sband)) 9249 return; 9250 9251 link = sdata_dereference(sdata->link[link_id], sdata); 9252 if (WARN_ON(!link)) 9253 return; 9254 9255 /* for MLO connections assume advertising all rates is OK */ 9256 if (!req->ap_mld_addr) { 9257 assoc_data->supp_rates = bss->supp_rates; 9258 assoc_data->supp_rates_len = bss->supp_rates_len; 9259 } 9260 9261 /* copy and link elems for the STA profile */ 9262 if (req->links[link_id].elems_len) { 9263 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9264 req->links[link_id].elems_len); 9265 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9266 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9267 assoc_data->ie_pos += req->links[link_id].elems_len; 9268 } 9269 9270 link->u.mgd.beacon_crc_valid = false; 9271 link->u.mgd.dtim_period = 0; 9272 link->u.mgd.have_beacon = false; 9273 9274 /* override HT configuration only if the AP and we support it */ 9275 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9276 struct ieee80211_sta_ht_cap sta_ht_cap; 9277 9278 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9279 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9280 } 9281 9282 rcu_read_lock(); 9283 bss_ies = rcu_dereference(cbss->beacon_ies); 9284 if (bss_ies) { 9285 u8 dtim_count = 0; 9286 9287 ieee80211_get_dtim(bss_ies, &dtim_count, 9288 &link->u.mgd.dtim_period); 9289 9290 sdata->deflink.u.mgd.have_beacon = true; 9291 9292 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9293 link->conf->sync_tsf = bss_ies->tsf; 9294 link->conf->sync_device_ts = bss->device_ts_beacon; 9295 link->conf->sync_dtim_count = dtim_count; 9296 } 9297 } else { 9298 bss_ies = rcu_dereference(cbss->ies); 9299 } 9300 9301 if (bss_ies) { 9302 const struct element *elem; 9303 9304 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9305 bss_ies->data, bss_ies->len); 9306 if (elem && elem->datalen >= 3) 9307 link->conf->profile_periodicity = elem->data[2]; 9308 else 9309 link->conf->profile_periodicity = 0; 9310 9311 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9312 bss_ies->data, bss_ies->len); 9313 if (elem && elem->datalen >= 11 && 9314 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9315 link->conf->ema_ap = true; 9316 else 9317 link->conf->ema_ap = false; 9318 } 9319 rcu_read_unlock(); 9320 9321 if (bss->corrupt_data) { 9322 char *corrupt_type = "data"; 9323 9324 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9325 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9326 corrupt_type = "beacon and probe response"; 9327 else 9328 corrupt_type = "beacon"; 9329 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9330 corrupt_type = "probe response"; 9331 } 9332 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9333 cbss->bssid, corrupt_type); 9334 } 9335 9336 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9337 if (sdata->u.mgd.powersave) 9338 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9339 else 9340 link->smps_mode = IEEE80211_SMPS_OFF; 9341 } else { 9342 link->smps_mode = link->u.mgd.req_smps; 9343 } 9344 } 9345 9346 static int 9347 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9348 struct ieee80211_mgd_assoc_data *assoc_data, 9349 int link_id) 9350 { 9351 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9352 enum nl80211_band band = cbss->channel->band; 9353 struct ieee80211_supported_band *sband; 9354 const struct element *elem; 9355 int err; 9356 9357 /* neither HT nor VHT elements used on 6 GHz */ 9358 if (band == NL80211_BAND_6GHZ) 9359 return 0; 9360 9361 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9362 return 0; 9363 9364 rcu_read_lock(); 9365 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9366 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9367 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9368 cbss->bssid); 9369 err = -EINVAL; 9370 goto out_rcu; 9371 } 9372 assoc_data->link[link_id].ap_ht_param = 9373 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9374 rcu_read_unlock(); 9375 9376 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9377 return 0; 9378 9379 /* some drivers want to support VHT on 2.4 GHz even */ 9380 sband = sdata->local->hw.wiphy->bands[band]; 9381 if (!sband->vht_cap.vht_supported) 9382 return 0; 9383 9384 rcu_read_lock(); 9385 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9386 /* but even then accept it not being present on the AP */ 9387 if (!elem && band == NL80211_BAND_2GHZ) { 9388 err = 0; 9389 goto out_rcu; 9390 } 9391 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9392 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9393 cbss->bssid); 9394 err = -EINVAL; 9395 goto out_rcu; 9396 } 9397 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9398 sizeof(struct ieee80211_vht_cap)); 9399 rcu_read_unlock(); 9400 9401 return 0; 9402 out_rcu: 9403 rcu_read_unlock(); 9404 return err; 9405 } 9406 9407 static bool 9408 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9409 { 9410 const struct cfg80211_bss_ies *ies; 9411 struct cfg80211_bss *bss; 9412 const struct element *ml; 9413 9414 /* not an MLO connection if link_id < 0, so irrelevant */ 9415 if (req->link_id < 0) 9416 return false; 9417 9418 bss = req->links[req->link_id].bss; 9419 9420 guard(rcu)(); 9421 ies = rcu_dereference(bss->ies); 9422 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9423 ies->data, ies->len) { 9424 const struct ieee80211_multi_link_elem *mle; 9425 9426 if (!ieee80211_mle_type_ok(ml->data + 1, 9427 IEEE80211_ML_CONTROL_TYPE_BASIC, 9428 ml->datalen - 1)) 9429 continue; 9430 9431 mle = (void *)(ml->data + 1); 9432 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9433 return true; 9434 } 9435 9436 return false; 9437 9438 } 9439 9440 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9441 struct cfg80211_assoc_request *req) 9442 { 9443 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9444 struct ieee80211_local *local = sdata->local; 9445 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9446 struct ieee80211_mgd_assoc_data *assoc_data; 9447 const struct element *ssid_elem; 9448 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9449 struct ieee80211_link_data *link; 9450 struct cfg80211_bss *cbss; 9451 bool override, uapsd_supported; 9452 bool match_auth; 9453 int i, err; 9454 size_t size = sizeof(*assoc_data) + req->ie_len; 9455 9456 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9457 size += req->links[i].elems_len; 9458 9459 /* FIXME: no support for 4-addr MLO yet */ 9460 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9461 return -EOPNOTSUPP; 9462 9463 assoc_data = kzalloc(size, GFP_KERNEL); 9464 if (!assoc_data) 9465 return -ENOMEM; 9466 9467 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9468 9469 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9470 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9471 err = -EINVAL; 9472 goto err_free; 9473 } 9474 9475 rcu_read_lock(); 9476 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9477 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9478 rcu_read_unlock(); 9479 err = -EINVAL; 9480 goto err_free; 9481 } 9482 9483 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9484 assoc_data->ssid_len = ssid_elem->datalen; 9485 rcu_read_unlock(); 9486 9487 if (req->ap_mld_addr) 9488 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9489 else 9490 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9491 9492 /* 9493 * Many APs have broken parsing of the extended MLD capa/ops field, 9494 * dropping (re-)association request frames or replying with association 9495 * response with a failure status if it's present. 9496 * Set our value from the userspace request only in strict mode or if 9497 * the AP also had that field present. 9498 */ 9499 if (ieee80211_hw_check(&local->hw, STRICT) || 9500 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9501 assoc_data->ext_mld_capa_ops = 9502 cpu_to_le16(req->ext_mld_capa_ops); 9503 9504 if (ifmgd->associated) { 9505 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9506 9507 sdata_info(sdata, 9508 "disconnect from AP %pM for new assoc to %pM\n", 9509 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9510 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9511 WLAN_REASON_UNSPECIFIED, 9512 false, frame_buf); 9513 9514 ieee80211_report_disconnect(sdata, frame_buf, 9515 sizeof(frame_buf), true, 9516 WLAN_REASON_UNSPECIFIED, 9517 false); 9518 } 9519 9520 memset(sdata->u.mgd.userspace_selectors, 0, 9521 sizeof(sdata->u.mgd.userspace_selectors)); 9522 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9523 req->supported_selectors, 9524 req->supported_selectors_len); 9525 9526 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9527 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9528 sizeof(ifmgd->ht_capa_mask)); 9529 9530 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9531 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9532 sizeof(ifmgd->vht_capa_mask)); 9533 9534 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9535 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9536 sizeof(ifmgd->s1g_capa_mask)); 9537 9538 /* keep some setup (AP STA, channel, ...) if matching */ 9539 match_auth = ifmgd->auth_data && 9540 ether_addr_equal(ifmgd->auth_data->ap_addr, 9541 assoc_data->ap_addr) && 9542 ifmgd->auth_data->link_id == req->link_id; 9543 9544 if (req->ap_mld_addr) { 9545 uapsd_supported = true; 9546 9547 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9548 ASSOC_REQ_DISABLE_VHT | 9549 ASSOC_REQ_DISABLE_HE | 9550 ASSOC_REQ_DISABLE_EHT)) { 9551 err = -EINVAL; 9552 goto err_free; 9553 } 9554 9555 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9556 struct ieee80211_supported_band *sband; 9557 struct cfg80211_bss *link_cbss = req->links[i].bss; 9558 struct ieee80211_bss *bss; 9559 9560 if (!link_cbss) 9561 continue; 9562 9563 bss = (void *)link_cbss->priv; 9564 9565 if (!bss->wmm_used) { 9566 err = -EINVAL; 9567 req->links[i].error = err; 9568 goto err_free; 9569 } 9570 9571 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9572 err = -EINVAL; 9573 req->links[i].error = err; 9574 goto err_free; 9575 } 9576 9577 link = sdata_dereference(sdata->link[i], sdata); 9578 if (link) 9579 ether_addr_copy(assoc_data->link[i].addr, 9580 link->conf->addr); 9581 else 9582 eth_random_addr(assoc_data->link[i].addr); 9583 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9584 9585 if (match_auth && i == assoc_link_id && link) 9586 assoc_data->link[i].conn = link->u.mgd.conn; 9587 else 9588 assoc_data->link[i].conn = 9589 ieee80211_conn_settings_unlimited; 9590 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9591 req, true, i, 9592 &assoc_data->link[i].conn); 9593 assoc_data->link[i].bss = link_cbss; 9594 assoc_data->link[i].disabled = req->links[i].disabled; 9595 9596 if (!bss->uapsd_supported) 9597 uapsd_supported = false; 9598 9599 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9600 err = -EINVAL; 9601 req->links[i].error = err; 9602 goto err_free; 9603 } 9604 9605 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9606 assoc_data, i); 9607 if (err) { 9608 err = -EINVAL; 9609 req->links[i].error = err; 9610 goto err_free; 9611 } 9612 } 9613 9614 assoc_data->wmm = true; 9615 } else { 9616 struct ieee80211_supported_band *sband; 9617 struct ieee80211_bss *bss = (void *)cbss->priv; 9618 9619 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9620 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9621 9622 assoc_data->wmm = bss->wmm_used && 9623 (local->hw.queues >= IEEE80211_NUM_ACS); 9624 9625 if (cbss->channel->band == NL80211_BAND_6GHZ && 9626 req->flags & (ASSOC_REQ_DISABLE_HT | 9627 ASSOC_REQ_DISABLE_VHT | 9628 ASSOC_REQ_DISABLE_HE)) { 9629 err = -EINVAL; 9630 goto err_free; 9631 } 9632 9633 sband = local->hw.wiphy->bands[cbss->channel->band]; 9634 9635 assoc_data->link[0].bss = cbss; 9636 9637 if (match_auth) 9638 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9639 else 9640 assoc_data->link[0].conn = 9641 ieee80211_conn_settings_unlimited; 9642 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9643 assoc_data->wmm, 0, 9644 &assoc_data->link[0].conn); 9645 9646 uapsd_supported = bss->uapsd_supported; 9647 9648 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9649 if (err) 9650 goto err_free; 9651 } 9652 9653 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9654 9655 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9656 err = -EBUSY; 9657 goto err_free; 9658 } 9659 9660 if (ifmgd->assoc_data) { 9661 err = -EBUSY; 9662 goto err_free; 9663 } 9664 9665 /* Cleanup is delayed if auth_data matches */ 9666 if (ifmgd->auth_data && !match_auth) 9667 ieee80211_destroy_auth_data(sdata, false); 9668 9669 if (req->ie && req->ie_len) { 9670 memcpy(assoc_data->ie, req->ie, req->ie_len); 9671 assoc_data->ie_len = req->ie_len; 9672 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9673 } else { 9674 assoc_data->ie_pos = assoc_data->ie; 9675 } 9676 9677 if (req->fils_kek) { 9678 /* should already be checked in cfg80211 - so warn */ 9679 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9680 err = -EINVAL; 9681 goto err_free; 9682 } 9683 memcpy(assoc_data->fils_kek, req->fils_kek, 9684 req->fils_kek_len); 9685 assoc_data->fils_kek_len = req->fils_kek_len; 9686 } 9687 9688 if (req->fils_nonces) 9689 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9690 2 * FILS_NONCE_LEN); 9691 9692 /* default timeout */ 9693 assoc_data->timeout = jiffies; 9694 assoc_data->timeout_started = true; 9695 9696 assoc_data->assoc_link_id = assoc_link_id; 9697 9698 if (req->ap_mld_addr) { 9699 /* if there was no authentication, set up the link */ 9700 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9701 if (err) 9702 goto err_clear; 9703 } 9704 9705 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9706 if (WARN_ON(!link)) { 9707 err = -EINVAL; 9708 goto err_clear; 9709 } 9710 9711 override = link->u.mgd.conn.mode != 9712 assoc_data->link[assoc_link_id].conn.mode || 9713 link->u.mgd.conn.bw_limit != 9714 assoc_data->link[assoc_link_id].conn.bw_limit; 9715 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9716 9717 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9718 assoc_link_id); 9719 9720 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9721 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9722 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9723 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9724 9725 if (assoc_data->wmm && uapsd_supported && 9726 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9727 assoc_data->uapsd = true; 9728 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9729 } else { 9730 assoc_data->uapsd = false; 9731 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9732 } 9733 9734 if (req->prev_bssid) 9735 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9736 9737 if (req->use_mfp) { 9738 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9739 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9740 } else { 9741 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9742 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9743 } 9744 9745 if (req->flags & ASSOC_REQ_USE_RRM) 9746 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9747 else 9748 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9749 9750 if (req->crypto.control_port) 9751 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9752 else 9753 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9754 9755 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9756 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9757 sdata->control_port_over_nl80211 = 9758 req->crypto.control_port_over_nl80211; 9759 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9760 9761 /* kick off associate process */ 9762 ifmgd->assoc_data = assoc_data; 9763 9764 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9765 if (!assoc_data->link[i].bss) 9766 continue; 9767 if (i == assoc_data->assoc_link_id) 9768 continue; 9769 /* only calculate the mode, hence link == NULL */ 9770 err = ieee80211_prep_channel(sdata, NULL, i, 9771 assoc_data->link[i].bss, true, 9772 &assoc_data->link[i].conn, 9773 sdata->u.mgd.userspace_selectors); 9774 if (err) { 9775 req->links[i].error = err; 9776 goto err_clear; 9777 } 9778 } 9779 9780 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9781 vif_cfg->ssid_len = assoc_data->ssid_len; 9782 9783 /* needed for transmitting the assoc frames properly */ 9784 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9785 9786 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9787 req->ap_mld_addr, true, 9788 &assoc_data->link[assoc_link_id].conn, 9789 override, 9790 sdata->u.mgd.userspace_selectors); 9791 if (err) 9792 goto err_clear; 9793 9794 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9795 const struct cfg80211_bss_ies *beacon_ies; 9796 9797 rcu_read_lock(); 9798 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9799 if (!beacon_ies) { 9800 /* 9801 * Wait up to one beacon interval ... 9802 * should this be more if we miss one? 9803 */ 9804 sdata_info(sdata, "waiting for beacon from %pM\n", 9805 link->u.mgd.bssid); 9806 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9807 assoc_data->timeout_started = true; 9808 assoc_data->need_beacon = true; 9809 } 9810 rcu_read_unlock(); 9811 } 9812 9813 run_again(sdata, assoc_data->timeout); 9814 9815 /* We are associating, clean up auth_data */ 9816 if (ifmgd->auth_data) 9817 ieee80211_destroy_auth_data(sdata, true); 9818 9819 return 0; 9820 err_clear: 9821 if (!ifmgd->auth_data) { 9822 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9823 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9824 BSS_CHANGED_BSSID); 9825 } 9826 ifmgd->assoc_data = NULL; 9827 err_free: 9828 kfree(assoc_data); 9829 return err; 9830 } 9831 9832 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9833 struct cfg80211_deauth_request *req) 9834 { 9835 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9836 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9837 bool tx = !req->local_state_change; 9838 struct ieee80211_prep_tx_info info = { 9839 .subtype = IEEE80211_STYPE_DEAUTH, 9840 }; 9841 9842 if (ifmgd->auth_data && 9843 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9844 sdata_info(sdata, 9845 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9846 req->bssid, req->reason_code, 9847 ieee80211_get_reason_code_string(req->reason_code)); 9848 9849 info.link_id = ifmgd->auth_data->link_id; 9850 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9851 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9852 IEEE80211_STYPE_DEAUTH, 9853 req->reason_code, tx, 9854 frame_buf); 9855 ieee80211_destroy_auth_data(sdata, false); 9856 ieee80211_report_disconnect(sdata, frame_buf, 9857 sizeof(frame_buf), true, 9858 req->reason_code, false); 9859 drv_mgd_complete_tx(sdata->local, sdata, &info); 9860 return 0; 9861 } 9862 9863 if (ifmgd->assoc_data && 9864 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9865 sdata_info(sdata, 9866 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9867 req->bssid, req->reason_code, 9868 ieee80211_get_reason_code_string(req->reason_code)); 9869 9870 info.link_id = ifmgd->assoc_data->assoc_link_id; 9871 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9872 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9873 IEEE80211_STYPE_DEAUTH, 9874 req->reason_code, tx, 9875 frame_buf); 9876 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9877 ieee80211_report_disconnect(sdata, frame_buf, 9878 sizeof(frame_buf), true, 9879 req->reason_code, false); 9880 drv_mgd_complete_tx(sdata->local, sdata, &info); 9881 return 0; 9882 } 9883 9884 if (ifmgd->associated && 9885 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9886 sdata_info(sdata, 9887 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9888 req->bssid, req->reason_code, 9889 ieee80211_get_reason_code_string(req->reason_code)); 9890 9891 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9892 req->reason_code, tx, frame_buf); 9893 ieee80211_report_disconnect(sdata, frame_buf, 9894 sizeof(frame_buf), true, 9895 req->reason_code, false); 9896 return 0; 9897 } 9898 9899 return -ENOTCONN; 9900 } 9901 9902 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9903 struct cfg80211_disassoc_request *req) 9904 { 9905 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9906 9907 if (!sdata->u.mgd.associated || 9908 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9909 return -ENOTCONN; 9910 9911 sdata_info(sdata, 9912 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9913 req->ap_addr, req->reason_code, 9914 ieee80211_get_reason_code_string(req->reason_code)); 9915 9916 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9917 req->reason_code, !req->local_state_change, 9918 frame_buf); 9919 9920 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9921 req->reason_code, false); 9922 9923 return 0; 9924 } 9925 9926 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9927 { 9928 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9929 &link->u.mgd.request_smps_work); 9930 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9931 &link->u.mgd.recalc_smps); 9932 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9933 &link->u.mgd.csa.switch_work); 9934 } 9935 9936 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9937 { 9938 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9939 9940 /* 9941 * Make sure some work items will not run after this, 9942 * they will not do anything but might not have been 9943 * cancelled when disconnecting. 9944 */ 9945 wiphy_work_cancel(sdata->local->hw.wiphy, 9946 &ifmgd->monitor_work); 9947 wiphy_work_cancel(sdata->local->hw.wiphy, 9948 &ifmgd->beacon_connection_loss_work); 9949 wiphy_work_cancel(sdata->local->hw.wiphy, 9950 &ifmgd->csa_connection_drop_work); 9951 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9952 &ifmgd->tdls_peer_del_work); 9953 9954 if (ifmgd->assoc_data) 9955 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9956 if (ifmgd->auth_data) 9957 ieee80211_destroy_auth_data(sdata, false); 9958 spin_lock_bh(&ifmgd->teardown_lock); 9959 if (ifmgd->teardown_skb) { 9960 kfree_skb(ifmgd->teardown_skb); 9961 ifmgd->teardown_skb = NULL; 9962 ifmgd->orig_teardown_skb = NULL; 9963 } 9964 kfree(ifmgd->assoc_req_ies); 9965 ifmgd->assoc_req_ies = NULL; 9966 ifmgd->assoc_req_ies_len = 0; 9967 spin_unlock_bh(&ifmgd->teardown_lock); 9968 timer_delete_sync(&ifmgd->timer); 9969 } 9970 9971 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9972 enum nl80211_cqm_rssi_threshold_event rssi_event, 9973 s32 rssi_level, 9974 gfp_t gfp) 9975 { 9976 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9977 9978 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9979 9980 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9981 } 9982 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9983 9984 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9985 { 9986 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9987 9988 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9989 9990 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9991 } 9992 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9993 9994 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9995 int rssi_min_thold, 9996 int rssi_max_thold) 9997 { 9998 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9999 10000 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10001 return; 10002 10003 /* 10004 * Scale up threshold values before storing it, as the RSSI averaging 10005 * algorithm uses a scaled up value as well. Change this scaling 10006 * factor if the RSSI averaging algorithm changes. 10007 */ 10008 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10009 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10010 } 10011 10012 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10013 int rssi_min_thold, 10014 int rssi_max_thold) 10015 { 10016 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10017 10018 WARN_ON(rssi_min_thold == rssi_max_thold || 10019 rssi_min_thold > rssi_max_thold); 10020 10021 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10022 rssi_max_thold); 10023 } 10024 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10025 10026 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10027 { 10028 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10029 10030 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10031 } 10032 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10033 10034 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10035 struct ieee80211_mgmt *mgmt, size_t len) 10036 { 10037 struct ieee80211_local *local = sdata->local; 10038 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10039 struct ieee80211_mgd_assoc_data *add_links_data = 10040 ifmgd->reconf.add_links_data; 10041 struct sta_info *sta; 10042 struct cfg80211_mlo_reconf_done_data done_data = {}; 10043 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10044 sdata->u.mgd.reconf.removed_links; 10045 u16 link_mask, valid_links; 10046 unsigned int link_id; 10047 size_t orig_len = len; 10048 u8 i, group_key_data_len; 10049 u8 *pos; 10050 10051 if (!ieee80211_vif_is_mld(&sdata->vif) || 10052 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10053 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10054 sdata->u.mgd.reconf.dialog_token || 10055 !sta_changed_links) 10056 return; 10057 10058 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10059 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10060 10061 /* each status duple is 3 octets */ 10062 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10063 sdata_info(sdata, 10064 "mlo: reconf: unexpected len=%zu, count=%u\n", 10065 len, mgmt->u.action.u.ml_reconf_resp.count); 10066 goto disconnect; 10067 } 10068 10069 link_mask = sta_changed_links; 10070 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10071 u16 status = get_unaligned_le16(pos + 1); 10072 10073 link_id = *pos; 10074 10075 if (!(link_mask & BIT(link_id))) { 10076 sdata_info(sdata, 10077 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10078 link_id, sta_changed_links); 10079 goto disconnect; 10080 } 10081 10082 /* clear the corresponding link, to detect the case that 10083 * the same link was included more than one time 10084 */ 10085 link_mask &= ~BIT(link_id); 10086 10087 /* Handle failure to remove links here. Failure to remove added 10088 * links will be done later in the flow. 10089 */ 10090 if (status != WLAN_STATUS_SUCCESS) { 10091 sdata_info(sdata, 10092 "mlo: reconf: failed on link=%u, status=%u\n", 10093 link_id, status); 10094 10095 /* The AP MLD failed to remove a link that was already 10096 * removed locally. As this is not expected behavior, 10097 * disconnect 10098 */ 10099 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10100 goto disconnect; 10101 10102 /* The AP MLD failed to add a link. Remove it from the 10103 * added links. 10104 */ 10105 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10106 } 10107 10108 pos += 3; 10109 len -= 3; 10110 } 10111 10112 if (link_mask) { 10113 sdata_info(sdata, 10114 "mlo: reconf: no response for links=0x%x\n", 10115 link_mask); 10116 goto disconnect; 10117 } 10118 10119 if (!sdata->u.mgd.reconf.added_links) 10120 goto out; 10121 10122 if (len < 1 || len < 1 + *pos) { 10123 sdata_info(sdata, 10124 "mlo: reconf: invalid group key data length"); 10125 goto disconnect; 10126 } 10127 10128 /* The Group Key Data field must be present when links are added. This 10129 * field should be processed by userland. 10130 */ 10131 group_key_data_len = *pos++; 10132 10133 pos += group_key_data_len; 10134 len -= group_key_data_len + 1; 10135 10136 /* Process the information for the added links */ 10137 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10138 if (WARN_ON(!sta)) 10139 goto disconnect; 10140 10141 valid_links = sdata->vif.valid_links; 10142 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10143 if (!add_links_data->link[link_id].bss || 10144 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10145 continue; 10146 10147 valid_links |= BIT(link_id); 10148 if (ieee80211_sta_allocate_link(sta, link_id)) 10149 goto disconnect; 10150 } 10151 10152 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10153 link_mask = 0; 10154 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10155 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10156 struct ieee80211_link_data *link; 10157 struct link_sta_info *link_sta; 10158 u64 changed = 0; 10159 10160 if (!cbss) 10161 continue; 10162 10163 link = sdata_dereference(sdata->link[link_id], sdata); 10164 if (WARN_ON(!link)) 10165 goto disconnect; 10166 10167 link_info(link, 10168 "mlo: reconf: local address %pM, AP link address %pM\n", 10169 add_links_data->link[link_id].addr, 10170 add_links_data->link[link_id].bss->bssid); 10171 10172 link_sta = rcu_dereference_protected(sta->link[link_id], 10173 lockdep_is_held(&local->hw.wiphy->mtx)); 10174 if (WARN_ON(!link_sta)) 10175 goto disconnect; 10176 10177 if (!link->u.mgd.have_beacon) { 10178 const struct cfg80211_bss_ies *ies; 10179 10180 rcu_read_lock(); 10181 ies = rcu_dereference(cbss->beacon_ies); 10182 if (ies) 10183 link->u.mgd.have_beacon = true; 10184 else 10185 ies = rcu_dereference(cbss->ies); 10186 ieee80211_get_dtim(ies, 10187 &link->conf->sync_dtim_count, 10188 &link->u.mgd.dtim_period); 10189 link->conf->beacon_int = cbss->beacon_interval; 10190 rcu_read_unlock(); 10191 } 10192 10193 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10194 10195 link->u.mgd.conn = add_links_data->link[link_id].conn; 10196 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10197 true, &link->u.mgd.conn, 10198 sdata->u.mgd.userspace_selectors)) { 10199 link_info(link, "mlo: reconf: prep_channel failed\n"); 10200 goto disconnect; 10201 } 10202 10203 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10204 add_links_data->link[link_id].bss)) 10205 goto disconnect; 10206 10207 if (!ieee80211_assoc_config_link(link, link_sta, 10208 add_links_data->link[link_id].bss, 10209 mgmt, pos, len, 10210 &changed)) 10211 goto disconnect; 10212 10213 /* The AP MLD indicated success for this link, but the station 10214 * profile status indicated otherwise. Since there is an 10215 * inconsistency in the ML reconfiguration response, disconnect 10216 */ 10217 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10218 goto disconnect; 10219 10220 ieee80211_sta_init_nss(link_sta); 10221 if (ieee80211_sta_activate_link(sta, link_id)) 10222 goto disconnect; 10223 10224 changed |= ieee80211_link_set_associated(link, cbss); 10225 ieee80211_link_info_change_notify(sdata, link, changed); 10226 10227 ieee80211_recalc_smps(sdata, link); 10228 link_mask |= BIT(link_id); 10229 } 10230 10231 sdata_info(sdata, 10232 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10233 valid_links, link_mask); 10234 10235 /* links might have changed due to rejected ones, set them again */ 10236 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10237 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10238 10239 ieee80211_recalc_ps(local); 10240 ieee80211_recalc_ps_vif(sdata); 10241 10242 done_data.buf = (const u8 *)mgmt; 10243 done_data.len = orig_len; 10244 done_data.added_links = link_mask; 10245 10246 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10247 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10248 done_data.links[link_id].addr = 10249 add_links_data->link[link_id].addr; 10250 } 10251 10252 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10253 kfree(sdata->u.mgd.reconf.add_links_data); 10254 sdata->u.mgd.reconf.add_links_data = NULL; 10255 out: 10256 ieee80211_ml_reconf_reset(sdata); 10257 return; 10258 10259 disconnect: 10260 __ieee80211_disconnect(sdata); 10261 } 10262 10263 static struct sk_buff * 10264 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10265 struct ieee80211_mgd_assoc_data *add_links_data, 10266 u16 removed_links, __le16 ext_mld_capa_ops) 10267 { 10268 struct ieee80211_local *local = sdata->local; 10269 struct ieee80211_mgmt *mgmt; 10270 struct ieee80211_multi_link_elem *ml_elem; 10271 struct ieee80211_mle_basic_common_info *common; 10272 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10273 struct sk_buff *skb; 10274 size_t size; 10275 unsigned int link_id; 10276 __le16 eml_capa = 0, mld_capa_ops = 0; 10277 struct ieee80211_tx_info *info; 10278 u8 common_size, var_common_size; 10279 u8 *ml_elem_len; 10280 u16 capab = 0; 10281 10282 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10283 10284 /* Consider the maximal length of the reconfiguration ML element */ 10285 size += sizeof(struct ieee80211_multi_link_elem); 10286 10287 /* The Basic ML element and the Reconfiguration ML element have the same 10288 * fixed common information fields in the context of ML reconfiguration 10289 * action frame. The AP MLD MAC address must always be present 10290 */ 10291 common_size = sizeof(*common); 10292 10293 /* when adding links, the MLD capabilities must be present */ 10294 var_common_size = 0; 10295 if (add_links_data) { 10296 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10297 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10298 ieee80211_vif_type_p2p(&sdata->vif)); 10299 10300 if (ift_ext_capa) { 10301 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10302 mld_capa_ops = 10303 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10304 } 10305 10306 /* MLD capabilities and operation */ 10307 var_common_size += 2; 10308 10309 /* EML capabilities */ 10310 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10311 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10312 var_common_size += 2; 10313 } 10314 10315 if (ext_mld_capa_ops) 10316 var_common_size += 2; 10317 10318 /* Add the common information length */ 10319 size += common_size + var_common_size; 10320 10321 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10322 struct cfg80211_bss *cbss; 10323 size_t elems_len; 10324 10325 if (removed_links & BIT(link_id)) { 10326 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10327 ETH_ALEN; 10328 continue; 10329 } 10330 10331 if (!add_links_data || !add_links_data->link[link_id].bss) 10332 continue; 10333 10334 elems_len = add_links_data->link[link_id].elems_len; 10335 cbss = add_links_data->link[link_id].bss; 10336 10337 /* should be the same across all BSSes */ 10338 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10339 capab |= WLAN_CAPABILITY_PRIVACY; 10340 10341 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10342 ETH_ALEN; 10343 10344 /* WMM */ 10345 size += 9; 10346 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10347 elems_len); 10348 } 10349 10350 skb = alloc_skb(size, GFP_KERNEL); 10351 if (!skb) 10352 return NULL; 10353 10354 skb_reserve(skb, local->hw.extra_tx_headroom); 10355 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10356 u.action.u.ml_reconf_req)); 10357 10358 /* Add the MAC header */ 10359 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10360 IEEE80211_STYPE_ACTION); 10361 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10362 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10363 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10364 10365 /* Add the action frame fixed fields */ 10366 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10367 mgmt->u.action.u.ml_reconf_req.action_code = 10368 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10369 10370 /* allocate a dialog token and store it */ 10371 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10372 mgmt->u.action.u.ml_reconf_req.dialog_token = 10373 sdata->u.mgd.reconf.dialog_token; 10374 10375 /* Add the ML reconfiguration element and the common information */ 10376 skb_put_u8(skb, WLAN_EID_EXTENSION); 10377 ml_elem_len = skb_put(skb, 1); 10378 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10379 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10380 ml_elem->control = 10381 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10382 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10383 common = skb_put(skb, common_size); 10384 common->len = common_size + var_common_size; 10385 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10386 10387 if (add_links_data) { 10388 if (eml_capa & 10389 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10390 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10391 ml_elem->control |= 10392 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10393 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10394 } 10395 10396 ml_elem->control |= 10397 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10398 10399 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10400 } 10401 10402 if (ext_mld_capa_ops) { 10403 ml_elem->control |= 10404 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10405 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10406 } 10407 10408 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10409 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10410 10411 /* Add the per station profile */ 10412 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10413 u8 *subelem_len = NULL; 10414 u16 ctrl; 10415 const u8 *addr; 10416 10417 /* Skip links that are not changing */ 10418 if (!(removed_links & BIT(link_id)) && 10419 (!add_links_data || !add_links_data->link[link_id].bss)) 10420 continue; 10421 10422 ctrl = link_id | 10423 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10424 10425 if (removed_links & BIT(link_id)) { 10426 struct ieee80211_bss_conf *conf = 10427 sdata_dereference(sdata->vif.link_conf[link_id], 10428 sdata); 10429 if (!conf) 10430 continue; 10431 10432 addr = conf->addr; 10433 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10434 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10435 } else { 10436 addr = add_links_data->link[link_id].addr; 10437 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10438 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10439 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10440 } 10441 10442 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10443 subelem_len = skb_put(skb, 1); 10444 10445 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10446 skb_put_u8(skb, 1 + ETH_ALEN); 10447 skb_put_data(skb, addr, ETH_ALEN); 10448 10449 if (!(removed_links & BIT(link_id))) { 10450 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10451 size_t extra_used; 10452 void *capab_pos; 10453 u8 qos_info; 10454 10455 capab_pos = skb_put(skb, 2); 10456 10457 extra_used = 10458 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10459 add_links_data->link[link_id].elems, 10460 add_links_data->link[link_id].elems_len, 10461 link_id, NULL, 10462 link_present_elems, 10463 add_links_data); 10464 10465 if (add_links_data->link[link_id].elems) 10466 skb_put_data(skb, 10467 add_links_data->link[link_id].elems + 10468 extra_used, 10469 add_links_data->link[link_id].elems_len - 10470 extra_used); 10471 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10472 qos_info = sdata->u.mgd.uapsd_queues; 10473 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10474 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10475 } else { 10476 qos_info = 0; 10477 } 10478 10479 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10480 put_unaligned_le16(capab, capab_pos); 10481 } 10482 10483 ieee80211_fragment_element(skb, subelem_len, 10484 IEEE80211_MLE_SUBELEM_FRAGMENT); 10485 } 10486 10487 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10488 10489 info = IEEE80211_SKB_CB(skb); 10490 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10491 10492 return skb; 10493 } 10494 10495 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10496 struct cfg80211_ml_reconf_req *req) 10497 { 10498 struct ieee80211_local *local = sdata->local; 10499 struct ieee80211_mgd_assoc_data *data = NULL; 10500 struct sta_info *sta; 10501 struct sk_buff *skb; 10502 u16 added_links, new_valid_links; 10503 int link_id, err; 10504 10505 if (!ieee80211_vif_is_mld(&sdata->vif) || 10506 !(sdata->vif.cfg.mld_capa_op & 10507 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10508 return -EINVAL; 10509 10510 /* No support for concurrent ML reconfiguration operation */ 10511 if (sdata->u.mgd.reconf.added_links || 10512 sdata->u.mgd.reconf.removed_links) 10513 return -EBUSY; 10514 10515 added_links = 0; 10516 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10517 if (!req->add_links[link_id].bss) 10518 continue; 10519 10520 added_links |= BIT(link_id); 10521 } 10522 10523 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10524 if (WARN_ON(!sta)) 10525 return -ENOLINK; 10526 10527 /* Adding links to the set of valid link is done only after a successful 10528 * ML reconfiguration frame exchange. Here prepare the data for the ML 10529 * reconfiguration frame construction and allocate the required 10530 * resources 10531 */ 10532 if (added_links) { 10533 bool uapsd_supported; 10534 10535 data = kzalloc(sizeof(*data), GFP_KERNEL); 10536 if (!data) 10537 return -ENOMEM; 10538 10539 data->assoc_link_id = -1; 10540 data->wmm = true; 10541 10542 uapsd_supported = true; 10543 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10544 link_id++) { 10545 struct ieee80211_supported_band *sband; 10546 struct cfg80211_bss *link_cbss = 10547 req->add_links[link_id].bss; 10548 struct ieee80211_bss *bss; 10549 10550 if (!link_cbss) 10551 continue; 10552 10553 bss = (void *)link_cbss->priv; 10554 10555 if (!bss->wmm_used) { 10556 err = -EINVAL; 10557 goto err_free; 10558 } 10559 10560 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10561 err = -EINVAL; 10562 goto err_free; 10563 } 10564 10565 eth_random_addr(data->link[link_id].addr); 10566 data->link[link_id].conn = 10567 ieee80211_conn_settings_unlimited; 10568 sband = 10569 local->hw.wiphy->bands[link_cbss->channel->band]; 10570 10571 ieee80211_determine_our_sta_mode(sdata, sband, 10572 NULL, true, link_id, 10573 &data->link[link_id].conn); 10574 10575 data->link[link_id].bss = link_cbss; 10576 data->link[link_id].disabled = 10577 req->add_links[link_id].disabled; 10578 data->link[link_id].elems = 10579 (u8 *)req->add_links[link_id].elems; 10580 data->link[link_id].elems_len = 10581 req->add_links[link_id].elems_len; 10582 10583 if (!bss->uapsd_supported) 10584 uapsd_supported = false; 10585 10586 if (data->link[link_id].conn.mode < 10587 IEEE80211_CONN_MODE_EHT) { 10588 err = -EINVAL; 10589 goto err_free; 10590 } 10591 10592 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10593 link_id); 10594 if (err) { 10595 err = -EINVAL; 10596 goto err_free; 10597 } 10598 } 10599 10600 /* Require U-APSD support if we enabled it */ 10601 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10602 !uapsd_supported) { 10603 err = -EINVAL; 10604 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10605 goto err_free; 10606 } 10607 10608 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10609 link_id++) { 10610 if (!data->link[link_id].bss) 10611 continue; 10612 10613 /* only used to verify the mode, nothing is allocated */ 10614 err = ieee80211_prep_channel(sdata, NULL, link_id, 10615 data->link[link_id].bss, 10616 true, 10617 &data->link[link_id].conn, 10618 sdata->u.mgd.userspace_selectors); 10619 if (err) 10620 goto err_free; 10621 } 10622 } 10623 10624 /* link removal is done before the ML reconfiguration frame exchange so 10625 * that these links will not be used between their removal by the AP MLD 10626 * and before the station got the ML reconfiguration response. Based on 10627 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10628 * link removal request. 10629 */ 10630 if (req->rem_links) { 10631 u16 new_active_links = 10632 sdata->vif.active_links & ~req->rem_links; 10633 10634 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10635 10636 /* Should not be left with no valid links to perform the 10637 * ML reconfiguration 10638 */ 10639 if (!new_valid_links || 10640 !(new_valid_links & ~sdata->vif.dormant_links)) { 10641 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10642 err = -EINVAL; 10643 goto err_free; 10644 } 10645 10646 if (new_active_links != sdata->vif.active_links) { 10647 if (!new_active_links) 10648 new_active_links = 10649 BIT(__ffs(new_valid_links & 10650 ~sdata->vif.dormant_links)); 10651 10652 err = ieee80211_set_active_links(&sdata->vif, 10653 new_active_links); 10654 if (err) { 10655 sdata_info(sdata, 10656 "mlo: reconf: failed set active links\n"); 10657 goto err_free; 10658 } 10659 } 10660 } 10661 10662 /* Build the SKB before the link removal as the construction of the 10663 * station info for removed links requires the local address. 10664 * Invalidate the removed links, so that the transmission of the ML 10665 * reconfiguration request frame would not be done using them, as the AP 10666 * is expected to send the ML reconfiguration response frame on the link 10667 * on which the request was received. 10668 */ 10669 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10670 cpu_to_le16(req->ext_mld_capa_ops)); 10671 if (!skb) { 10672 err = -ENOMEM; 10673 goto err_free; 10674 } 10675 10676 if (req->rem_links) { 10677 u16 new_dormant_links = 10678 sdata->vif.dormant_links & ~req->rem_links; 10679 10680 err = ieee80211_vif_set_links(sdata, new_valid_links, 10681 new_dormant_links); 10682 if (err) { 10683 sdata_info(sdata, 10684 "mlo: reconf: failed set valid links\n"); 10685 kfree_skb(skb); 10686 goto err_free; 10687 } 10688 10689 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10690 link_id++) { 10691 if (!(req->rem_links & BIT(link_id))) 10692 continue; 10693 10694 ieee80211_sta_remove_link(sta, link_id); 10695 } 10696 10697 /* notify the driver and upper layers */ 10698 ieee80211_vif_cfg_change_notify(sdata, 10699 BSS_CHANGED_MLD_VALID_LINKS); 10700 cfg80211_links_removed(sdata->dev, req->rem_links); 10701 } 10702 10703 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10704 added_links, req->rem_links); 10705 10706 ieee80211_tx_skb(sdata, skb); 10707 10708 sdata->u.mgd.reconf.added_links = added_links; 10709 sdata->u.mgd.reconf.add_links_data = data; 10710 sdata->u.mgd.reconf.removed_links = req->rem_links; 10711 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10712 &sdata->u.mgd.reconf.wk, 10713 IEEE80211_ASSOC_TIMEOUT_SHORT); 10714 return 0; 10715 10716 err_free: 10717 kfree(data); 10718 return err; 10719 } 10720 10721 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10722 { 10723 unsigned long valid_links = sdata->vif.valid_links; 10724 u8 link_id; 10725 10726 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10727 10728 if (!ieee80211_vif_is_mld(&sdata->vif)) 10729 return false; 10730 10731 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10732 struct ieee80211_bss_conf *bss_conf = 10733 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10734 10735 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10736 return false; 10737 } 10738 10739 return true; 10740 } 10741 10742 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10743 { 10744 struct ieee80211_local *local = sdata->local; 10745 struct ieee80211_mgmt *mgmt; 10746 struct sk_buff *skb; 10747 int frame_len = offsetofend(struct ieee80211_mgmt, 10748 u.action.u.epcs) + (enable ? 1 : 0); 10749 10750 if (!ieee80211_mgd_epcs_supp(sdata)) 10751 return -EINVAL; 10752 10753 if (sdata->u.mgd.epcs.enabled == enable && 10754 !sdata->u.mgd.epcs.dialog_token) 10755 return 0; 10756 10757 /* Do not allow enabling EPCS if the AP didn't respond yet. 10758 * However, allow disabling EPCS in such a case. 10759 */ 10760 if (sdata->u.mgd.epcs.dialog_token && enable) 10761 return -EALREADY; 10762 10763 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10764 if (!skb) 10765 return -ENOBUFS; 10766 10767 skb_reserve(skb, local->hw.extra_tx_headroom); 10768 mgmt = skb_put_zero(skb, frame_len); 10769 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10770 IEEE80211_STYPE_ACTION); 10771 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10772 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10773 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10774 10775 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10776 if (enable) { 10777 u8 *pos = mgmt->u.action.u.epcs.variable; 10778 10779 mgmt->u.action.u.epcs.action_code = 10780 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10781 10782 *pos = ++sdata->u.mgd.dialog_token_alloc; 10783 sdata->u.mgd.epcs.dialog_token = *pos; 10784 } else { 10785 mgmt->u.action.u.epcs.action_code = 10786 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10787 10788 ieee80211_epcs_teardown(sdata); 10789 ieee80211_epcs_changed(sdata, false); 10790 } 10791 10792 ieee80211_tx_skb(sdata, skb); 10793 return 0; 10794 } 10795 10796 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10797 struct ieee802_11_elems *elems) 10798 { 10799 const struct element *sub; 10800 size_t scratch_len = elems->ml_epcs_len; 10801 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10802 10803 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10804 10805 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10806 return; 10807 10808 if (WARN_ON(!scratch)) 10809 return; 10810 10811 /* Directly parse the sub elements as the common information doesn't 10812 * hold any useful information. 10813 */ 10814 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10815 elems->ml_epcs_len) { 10816 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10817 struct ieee80211_link_data *link; 10818 u8 *pos = (void *)sub->data; 10819 u16 control; 10820 ssize_t len; 10821 u8 link_id; 10822 10823 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10824 continue; 10825 10826 if (sub->datalen < sizeof(control)) 10827 break; 10828 10829 control = get_unaligned_le16(pos); 10830 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10831 10832 link = sdata_dereference(sdata->link[link_id], sdata); 10833 if (!link) 10834 continue; 10835 10836 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10837 elems->ml_epcs_len, 10838 scratch, scratch_len, 10839 IEEE80211_MLE_SUBELEM_FRAGMENT); 10840 if (len < (ssize_t)sizeof(control)) 10841 continue; 10842 10843 pos = scratch + sizeof(control); 10844 len -= sizeof(control); 10845 10846 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10847 if (!link_elems) 10848 continue; 10849 10850 if (ieee80211_sta_wmm_params(sdata->local, link, 10851 link_elems->wmm_param, 10852 link_elems->wmm_param_len, 10853 link_elems->mu_edca_param_set)) 10854 ieee80211_link_info_change_notify(sdata, link, 10855 BSS_CHANGED_QOS); 10856 } 10857 } 10858 10859 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10860 struct ieee80211_mgmt *mgmt, size_t len) 10861 { 10862 struct ieee802_11_elems *elems __free(kfree) = NULL; 10863 size_t ies_len; 10864 u16 status_code; 10865 u8 *pos, dialog_token; 10866 10867 if (!ieee80211_mgd_epcs_supp(sdata)) 10868 return; 10869 10870 /* Handle dialog token and status code */ 10871 pos = mgmt->u.action.u.epcs.variable; 10872 dialog_token = *pos; 10873 status_code = get_unaligned_le16(pos + 1); 10874 10875 /* An EPCS enable response with dialog token == 0 is an unsolicited 10876 * notification from the AP MLD. In such a case, EPCS should already be 10877 * enabled and status must be success 10878 */ 10879 if (!dialog_token && 10880 (!sdata->u.mgd.epcs.enabled || 10881 status_code != WLAN_STATUS_SUCCESS)) 10882 return; 10883 10884 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 10885 return; 10886 10887 sdata->u.mgd.epcs.dialog_token = 0; 10888 10889 if (status_code != WLAN_STATUS_SUCCESS) 10890 return; 10891 10892 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10893 ies_len = len - offsetof(struct ieee80211_mgmt, 10894 u.action.u.epcs.variable) - 10895 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10896 10897 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 10898 if (!elems) 10899 return; 10900 10901 ieee80211_ml_epcs(sdata, elems); 10902 ieee80211_epcs_changed(sdata, true); 10903 } 10904 10905 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 10906 struct ieee80211_mgmt *mgmt, size_t len) 10907 { 10908 if (!ieee80211_vif_is_mld(&sdata->vif) || 10909 !sdata->u.mgd.epcs.enabled) 10910 return; 10911 10912 ieee80211_epcs_teardown(sdata); 10913 ieee80211_epcs_changed(sdata, false); 10914 } 10915