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, u16 stype) 1218 { 1219 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1220 struct ieee80211_sub_if_data *sdata = link->sdata; 1221 struct ieee80211_chan_req chanreq = {}; 1222 struct cfg80211_chan_def ap_chandef; 1223 enum ieee80211_conn_mode ap_mode; 1224 const char *frame; 1225 u32 vht_cap_info = 0; 1226 u16 ht_opmode; 1227 int ret; 1228 1229 switch (stype) { 1230 case IEEE80211_STYPE_BEACON: 1231 frame = "beacon"; 1232 break; 1233 case IEEE80211_STYPE_ASSOC_RESP: 1234 frame = "assoc response"; 1235 break; 1236 case IEEE80211_STYPE_REASSOC_RESP: 1237 frame = "reassoc response"; 1238 break; 1239 case IEEE80211_STYPE_ACTION: 1240 /* the only action frame that gets here */ 1241 frame = "ML reconf response"; 1242 break; 1243 default: 1244 return -EINVAL; 1245 } 1246 1247 /* don't track any bandwidth changes in legacy/S1G modes */ 1248 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1249 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1250 return 0; 1251 1252 if (elems->vht_cap_elem) 1253 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1254 1255 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1256 elems, true, &link->u.mgd.conn, 1257 &ap_chandef); 1258 1259 if (ap_mode != link->u.mgd.conn.mode) { 1260 link_info(link, 1261 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1262 link->u.mgd.bssid, 1263 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1264 ieee80211_conn_mode_str(ap_mode), frame); 1265 return -EINVAL; 1266 } 1267 1268 chanreq.oper = ap_chandef; 1269 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1270 &ap_chandef); 1271 1272 /* 1273 * if HT operation mode changed store the new one - 1274 * this may be applicable even if channel is identical 1275 */ 1276 if (elems->ht_operation) { 1277 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1278 if (link->conf->ht_operation_mode != ht_opmode) { 1279 *changed |= BSS_CHANGED_HT; 1280 link->conf->ht_operation_mode = ht_opmode; 1281 } 1282 } 1283 1284 /* 1285 * Downgrade the new channel if we associated with restricted 1286 * bandwidth capabilities. For example, if we associated as a 1287 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1288 * or config reasons) then switching to a 40 MHz channel now 1289 * won't do us any good -- we couldn't use it with the AP. 1290 */ 1291 while (link->u.mgd.conn.bw_limit < 1292 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1293 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1294 1295 /* TPE element is not present in (re)assoc/ML reconfig response */ 1296 if (stype == IEEE80211_STYPE_BEACON && 1297 ap_chandef.chan->band == NL80211_BAND_6GHZ && 1298 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1299 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1300 &chanreq.oper); 1301 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1302 link->conf->tpe = elems->tpe; 1303 *changed |= BSS_CHANGED_TPE; 1304 } 1305 } 1306 1307 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1308 return 0; 1309 1310 link_info(link, 1311 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1312 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1313 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1314 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1315 chanreq.oper.center_freq2); 1316 1317 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1318 sdata_info(sdata, 1319 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1320 link->u.mgd.bssid, frame); 1321 return -EINVAL; 1322 } 1323 1324 if (!update) { 1325 link->conf->chanreq = chanreq; 1326 return 0; 1327 } 1328 1329 /* 1330 * We're tracking the current AP here, so don't do any further checks 1331 * here. This keeps us from playing ping-pong with regulatory, without 1332 * it the following can happen (for example): 1333 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1334 * - AP advertises regdom US 1335 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1336 * - we detect an unsupported channel and disconnect 1337 * - disconnect causes CRDA to reload world regdomain and the game 1338 * starts anew. 1339 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1340 * 1341 * It seems possible that there are still scenarios with CSA or real 1342 * bandwidth changes where a this could happen, but those cases are 1343 * less common and wouldn't completely prevent using the AP. 1344 */ 1345 1346 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1347 if (ret) { 1348 sdata_info(sdata, 1349 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1350 link->u.mgd.bssid, frame); 1351 return ret; 1352 } 1353 1354 cfg80211_schedule_channels_check(&sdata->wdev); 1355 return 0; 1356 } 1357 1358 /* frame sending functions */ 1359 1360 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1361 struct sk_buff *skb, u8 ap_ht_param, 1362 struct ieee80211_supported_band *sband, 1363 struct ieee80211_channel *channel, 1364 enum ieee80211_smps_mode smps, 1365 const struct ieee80211_conn_settings *conn) 1366 { 1367 u8 *pos; 1368 u32 flags = channel->flags; 1369 u16 cap; 1370 struct ieee80211_sta_ht_cap ht_cap; 1371 1372 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1373 1374 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1375 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1376 1377 /* determine capability flags */ 1378 cap = ht_cap.cap; 1379 1380 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1381 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1382 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1383 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1384 cap &= ~IEEE80211_HT_CAP_SGI_40; 1385 } 1386 break; 1387 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1388 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1389 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1390 cap &= ~IEEE80211_HT_CAP_SGI_40; 1391 } 1392 break; 1393 } 1394 1395 /* 1396 * If 40 MHz was disabled associate as though we weren't 1397 * capable of 40 MHz -- some broken APs will never fall 1398 * back to trying to transmit in 20 MHz. 1399 */ 1400 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1401 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1402 cap &= ~IEEE80211_HT_CAP_SGI_40; 1403 } 1404 1405 /* set SM PS mode properly */ 1406 cap &= ~IEEE80211_HT_CAP_SM_PS; 1407 switch (smps) { 1408 case IEEE80211_SMPS_AUTOMATIC: 1409 case IEEE80211_SMPS_NUM_MODES: 1410 WARN_ON(1); 1411 fallthrough; 1412 case IEEE80211_SMPS_OFF: 1413 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1414 IEEE80211_HT_CAP_SM_PS_SHIFT; 1415 break; 1416 case IEEE80211_SMPS_STATIC: 1417 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1418 IEEE80211_HT_CAP_SM_PS_SHIFT; 1419 break; 1420 case IEEE80211_SMPS_DYNAMIC: 1421 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1422 IEEE80211_HT_CAP_SM_PS_SHIFT; 1423 break; 1424 } 1425 1426 /* reserve and fill IE */ 1427 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1428 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1429 } 1430 1431 /* This function determines vht capability flags for the association 1432 * and builds the IE. 1433 * Note - the function returns true to own the MU-MIMO capability 1434 */ 1435 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1436 struct sk_buff *skb, 1437 struct ieee80211_supported_band *sband, 1438 struct ieee80211_vht_cap *ap_vht_cap, 1439 const struct ieee80211_conn_settings *conn) 1440 { 1441 struct ieee80211_local *local = sdata->local; 1442 u8 *pos; 1443 u32 cap; 1444 struct ieee80211_sta_vht_cap vht_cap; 1445 u32 mask, ap_bf_sts, our_bf_sts; 1446 bool mu_mimo_owner = false; 1447 1448 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1449 1450 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1451 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1452 1453 /* determine capability flags */ 1454 cap = vht_cap.cap; 1455 1456 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1457 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1458 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1459 } 1460 1461 /* 1462 * Some APs apparently get confused if our capabilities are better 1463 * than theirs, so restrict what we advertise in the assoc request. 1464 */ 1465 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1466 if (!(ap_vht_cap->vht_cap_info & 1467 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1468 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1469 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1470 else if (!(ap_vht_cap->vht_cap_info & 1471 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1472 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1473 } 1474 1475 /* 1476 * If some other vif is using the MU-MIMO capability we cannot associate 1477 * using MU-MIMO - this will lead to contradictions in the group-id 1478 * mechanism. 1479 * Ownership is defined since association request, in order to avoid 1480 * simultaneous associations with MU-MIMO. 1481 */ 1482 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1483 bool disable_mu_mimo = false; 1484 struct ieee80211_sub_if_data *other; 1485 1486 list_for_each_entry(other, &local->interfaces, list) { 1487 if (other->vif.bss_conf.mu_mimo_owner) { 1488 disable_mu_mimo = true; 1489 break; 1490 } 1491 } 1492 if (disable_mu_mimo) 1493 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1494 else 1495 mu_mimo_owner = true; 1496 } 1497 1498 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1499 1500 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1501 our_bf_sts = cap & mask; 1502 1503 if (ap_bf_sts < our_bf_sts) { 1504 cap &= ~mask; 1505 cap |= ap_bf_sts; 1506 } 1507 1508 /* reserve and fill IE */ 1509 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1510 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1511 1512 return mu_mimo_owner; 1513 } 1514 1515 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1516 struct sk_buff *skb, 1517 enum nl80211_chan_width width, 1518 struct ieee80211_supported_band *sband, 1519 struct ieee80211_mgd_assoc_data *assoc_data) 1520 { 1521 u32 rates; 1522 1523 if (assoc_data->supp_rates_len && 1524 !ieee80211_hw_check(&local->hw, STRICT)) { 1525 /* 1526 * Get all rates supported by the device and the AP as 1527 * some APs don't like getting a superset of their rates 1528 * in the association request (e.g. D-Link DAP 1353 in 1529 * b-only mode)... 1530 */ 1531 ieee80211_parse_bitrates(width, sband, 1532 assoc_data->supp_rates, 1533 assoc_data->supp_rates_len, 1534 &rates); 1535 } else { 1536 /* 1537 * In case AP not provide any supported rates information 1538 * before association, we send information element(s) with 1539 * all rates that we support. 1540 */ 1541 rates = ~0; 1542 } 1543 1544 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1545 WLAN_EID_SUPP_RATES); 1546 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1547 WLAN_EID_EXT_SUPP_RATES); 1548 } 1549 1550 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1551 const u8 *elems, 1552 size_t elems_len, 1553 size_t offset) 1554 { 1555 size_t noffset; 1556 1557 static const u8 before_ht[] = { 1558 WLAN_EID_SSID, 1559 WLAN_EID_SUPP_RATES, 1560 WLAN_EID_EXT_SUPP_RATES, 1561 WLAN_EID_PWR_CAPABILITY, 1562 WLAN_EID_SUPPORTED_CHANNELS, 1563 WLAN_EID_RSN, 1564 WLAN_EID_QOS_CAPA, 1565 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1566 WLAN_EID_MOBILITY_DOMAIN, 1567 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1568 WLAN_EID_RIC_DATA, /* reassoc only */ 1569 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1570 }; 1571 static const u8 after_ric[] = { 1572 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1573 WLAN_EID_HT_CAPABILITY, 1574 WLAN_EID_BSS_COEX_2040, 1575 /* luckily this is almost always there */ 1576 WLAN_EID_EXT_CAPABILITY, 1577 WLAN_EID_QOS_TRAFFIC_CAPA, 1578 WLAN_EID_TIM_BCAST_REQ, 1579 WLAN_EID_INTERWORKING, 1580 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1581 WLAN_EID_VHT_CAPABILITY, 1582 WLAN_EID_OPMODE_NOTIF, 1583 }; 1584 1585 if (!elems_len) 1586 return offset; 1587 1588 noffset = ieee80211_ie_split_ric(elems, elems_len, 1589 before_ht, 1590 ARRAY_SIZE(before_ht), 1591 after_ric, 1592 ARRAY_SIZE(after_ric), 1593 offset); 1594 skb_put_data(skb, elems + offset, noffset - offset); 1595 1596 return noffset; 1597 } 1598 1599 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1600 const u8 *elems, 1601 size_t elems_len, 1602 size_t offset) 1603 { 1604 static const u8 before_vht[] = { 1605 /* 1606 * no need to list the ones split off before HT 1607 * or generated here 1608 */ 1609 WLAN_EID_BSS_COEX_2040, 1610 WLAN_EID_EXT_CAPABILITY, 1611 WLAN_EID_QOS_TRAFFIC_CAPA, 1612 WLAN_EID_TIM_BCAST_REQ, 1613 WLAN_EID_INTERWORKING, 1614 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1615 }; 1616 size_t noffset; 1617 1618 if (!elems_len) 1619 return offset; 1620 1621 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1622 noffset = ieee80211_ie_split(elems, elems_len, 1623 before_vht, ARRAY_SIZE(before_vht), 1624 offset); 1625 skb_put_data(skb, elems + offset, noffset - offset); 1626 1627 return noffset; 1628 } 1629 1630 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1631 const u8 *elems, 1632 size_t elems_len, 1633 size_t offset) 1634 { 1635 static const u8 before_he[] = { 1636 /* 1637 * no need to list the ones split off before VHT 1638 * or generated here 1639 */ 1640 WLAN_EID_OPMODE_NOTIF, 1641 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1642 /* 11ai elements */ 1643 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1644 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1645 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1646 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1647 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1648 /* TODO: add 11ah/11aj/11ak elements */ 1649 }; 1650 size_t noffset; 1651 1652 if (!elems_len) 1653 return offset; 1654 1655 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1656 noffset = ieee80211_ie_split(elems, elems_len, 1657 before_he, ARRAY_SIZE(before_he), 1658 offset); 1659 skb_put_data(skb, elems + offset, noffset - offset); 1660 1661 return noffset; 1662 } 1663 1664 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1665 const u8 *elems, size_t elems_len, 1666 size_t offset) 1667 { 1668 static const u8 before_reg_conn[] = { 1669 /* 1670 * no need to list the ones split off before HE 1671 * or generated here 1672 */ 1673 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1674 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1675 }; 1676 size_t noffset; 1677 1678 if (!elems_len) 1679 return offset; 1680 1681 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1682 ARRAY_SIZE(before_reg_conn), offset); 1683 skb_put_data(skb, elems + offset, noffset - offset); 1684 1685 return noffset; 1686 } 1687 1688 #define PRESENT_ELEMS_MAX 8 1689 #define PRESENT_ELEM_EXT_OFFS 0x100 1690 1691 static void 1692 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1693 struct sk_buff *skb, u16 capab, 1694 const struct element *ext_capa, 1695 const u16 *present_elems, 1696 struct ieee80211_mgd_assoc_data *assoc_data); 1697 1698 static size_t 1699 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1700 struct sk_buff *skb, u16 *capab, 1701 const struct element *ext_capa, 1702 const u8 *extra_elems, 1703 size_t extra_elems_len, 1704 unsigned int link_id, 1705 struct ieee80211_link_data *link, 1706 u16 *present_elems, 1707 struct ieee80211_mgd_assoc_data *assoc_data) 1708 { 1709 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1710 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1711 struct ieee80211_channel *chan = cbss->channel; 1712 const struct ieee80211_sband_iftype_data *iftd; 1713 struct ieee80211_local *local = sdata->local; 1714 struct ieee80211_supported_band *sband; 1715 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1716 struct ieee80211_chanctx_conf *chanctx_conf; 1717 enum ieee80211_smps_mode smps_mode; 1718 u16 orig_capab = *capab; 1719 size_t offset = 0; 1720 int present_elems_len = 0; 1721 u8 *pos; 1722 int i; 1723 1724 #define ADD_PRESENT_ELEM(id) do { \ 1725 /* need a last for termination - we use 0 == SSID */ \ 1726 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1727 present_elems[present_elems_len++] = (id); \ 1728 } while (0) 1729 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1730 1731 if (link) 1732 smps_mode = link->smps_mode; 1733 else if (sdata->u.mgd.powersave) 1734 smps_mode = IEEE80211_SMPS_DYNAMIC; 1735 else 1736 smps_mode = IEEE80211_SMPS_OFF; 1737 1738 if (link) { 1739 /* 1740 * 5/10 MHz scenarios are only viable without MLO, in which 1741 * case this pointer should be used ... All of this is a bit 1742 * unclear though, not sure this even works at all. 1743 */ 1744 rcu_read_lock(); 1745 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1746 if (chanctx_conf) 1747 width = chanctx_conf->def.width; 1748 rcu_read_unlock(); 1749 } 1750 1751 sband = local->hw.wiphy->bands[chan->band]; 1752 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1753 1754 if (sband->band == NL80211_BAND_2GHZ) { 1755 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1756 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1757 } 1758 1759 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1760 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1761 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1762 1763 if (sband->band != NL80211_BAND_S1GHZ) 1764 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1765 1766 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1767 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1768 struct cfg80211_chan_def chandef = { 1769 .width = width, 1770 .chan = chan, 1771 }; 1772 1773 pos = skb_put(skb, 4); 1774 *pos++ = WLAN_EID_PWR_CAPABILITY; 1775 *pos++ = 2; 1776 *pos++ = 0; /* min tx power */ 1777 /* max tx power */ 1778 *pos++ = ieee80211_chandef_max_power(&chandef); 1779 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1780 } 1781 1782 /* 1783 * Per spec, we shouldn't include the list of channels if we advertise 1784 * support for extended channel switching, but we've always done that; 1785 * (for now?) apply this restriction only on the (new) 6 GHz band. 1786 */ 1787 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1788 (sband->band != NL80211_BAND_6GHZ || 1789 !ext_capa || ext_capa->datalen < 1 || 1790 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1791 /* TODO: get this in reg domain format */ 1792 pos = skb_put(skb, 2 * sband->n_channels + 2); 1793 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1794 *pos++ = 2 * sband->n_channels; 1795 for (i = 0; i < sband->n_channels; i++) { 1796 int cf = sband->channels[i].center_freq; 1797 1798 *pos++ = ieee80211_frequency_to_channel(cf); 1799 *pos++ = 1; /* one channel in the subband*/ 1800 } 1801 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1802 } 1803 1804 /* if present, add any custom IEs that go before HT */ 1805 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1806 extra_elems_len, 1807 offset); 1808 1809 if (sband->band != NL80211_BAND_6GHZ && 1810 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1811 ieee80211_add_ht_ie(sdata, skb, 1812 assoc_data->link[link_id].ap_ht_param, 1813 sband, chan, smps_mode, 1814 &assoc_data->link[link_id].conn); 1815 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1816 } 1817 1818 /* if present, add any custom IEs that go before VHT */ 1819 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1820 extra_elems_len, 1821 offset); 1822 1823 if (sband->band != NL80211_BAND_6GHZ && 1824 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1825 sband->vht_cap.vht_supported) { 1826 bool mu_mimo_owner = 1827 ieee80211_add_vht_ie(sdata, skb, sband, 1828 &assoc_data->link[link_id].ap_vht_cap, 1829 &assoc_data->link[link_id].conn); 1830 1831 if (link) 1832 link->conf->mu_mimo_owner = mu_mimo_owner; 1833 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1834 } 1835 1836 /* if present, add any custom IEs that go before HE */ 1837 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1838 extra_elems_len, 1839 offset); 1840 1841 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1842 ieee80211_put_he_cap(skb, sdata, sband, 1843 &assoc_data->link[link_id].conn); 1844 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1845 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1846 } 1847 1848 /* 1849 * if present, add any custom IEs that go before regulatory 1850 * connectivity element 1851 */ 1852 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1853 extra_elems_len, offset); 1854 1855 if (sband->band == NL80211_BAND_6GHZ) { 1856 /* 1857 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1858 * capable of operating on the 6 GHz band shall transmit 1859 * regulatory connectivity element. 1860 */ 1861 ieee80211_put_reg_conn(skb, chan->flags); 1862 } 1863 1864 /* 1865 * careful - need to know about all the present elems before 1866 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1867 * we're going to put it after the ML element 1868 */ 1869 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1870 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1871 1872 if (link_id == assoc_data->assoc_link_id) 1873 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1874 present_elems, assoc_data); 1875 1876 /* crash if somebody gets it wrong */ 1877 present_elems = NULL; 1878 1879 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1880 ieee80211_put_eht_cap(skb, sdata, sband, 1881 &assoc_data->link[link_id].conn); 1882 1883 if (sband->band == NL80211_BAND_S1GHZ) { 1884 ieee80211_add_aid_request_ie(sdata, skb); 1885 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1886 } 1887 1888 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1889 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1890 1891 return offset; 1892 } 1893 1894 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1895 const u16 *outer, 1896 const u16 *inner) 1897 { 1898 unsigned int skb_len = skb->len; 1899 bool at_extension = false; 1900 bool added = false; 1901 int i, j; 1902 u8 *len, *list_len = NULL; 1903 1904 skb_put_u8(skb, WLAN_EID_EXTENSION); 1905 len = skb_put(skb, 1); 1906 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1907 1908 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1909 u16 elem = outer[i]; 1910 bool have_inner = false; 1911 1912 /* should at least be sorted in the sense of normal -> ext */ 1913 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1914 1915 /* switch to extension list */ 1916 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1917 at_extension = true; 1918 if (!list_len) 1919 skb_put_u8(skb, 0); 1920 list_len = NULL; 1921 } 1922 1923 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1924 if (elem == inner[j]) { 1925 have_inner = true; 1926 break; 1927 } 1928 } 1929 1930 if (have_inner) 1931 continue; 1932 1933 if (!list_len) { 1934 list_len = skb_put(skb, 1); 1935 *list_len = 0; 1936 } 1937 *list_len += 1; 1938 skb_put_u8(skb, (u8)elem); 1939 added = true; 1940 } 1941 1942 /* if we added a list but no extension list, make a zero-len one */ 1943 if (added && (!at_extension || !list_len)) 1944 skb_put_u8(skb, 0); 1945 1946 /* if nothing added remove extension element completely */ 1947 if (!added) 1948 skb_trim(skb, skb_len); 1949 else 1950 *len = skb->len - skb_len - 2; 1951 } 1952 1953 static void 1954 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1955 struct sk_buff *skb, u16 capab, 1956 const struct element *ext_capa, 1957 const u16 *outer_present_elems, 1958 struct ieee80211_mgd_assoc_data *assoc_data) 1959 { 1960 struct ieee80211_local *local = sdata->local; 1961 struct ieee80211_multi_link_elem *ml_elem; 1962 struct ieee80211_mle_basic_common_info *common; 1963 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1964 __le16 eml_capa = 0, mld_capa_ops = 0; 1965 unsigned int link_id; 1966 u8 *ml_elem_len; 1967 void *capab_pos; 1968 1969 if (!ieee80211_vif_is_mld(&sdata->vif)) 1970 return; 1971 1972 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1973 ieee80211_vif_type_p2p(&sdata->vif)); 1974 if (ift_ext_capa) { 1975 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1976 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1977 } 1978 1979 skb_put_u8(skb, WLAN_EID_EXTENSION); 1980 ml_elem_len = skb_put(skb, 1); 1981 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1982 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1983 ml_elem->control = 1984 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1985 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1986 common = skb_put(skb, sizeof(*common)); 1987 common->len = sizeof(*common) + 1988 2; /* MLD capa/ops */ 1989 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1990 1991 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1992 if (eml_capa & 1993 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1994 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1995 common->len += 2; /* EML capabilities */ 1996 ml_elem->control |= 1997 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1998 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1999 } 2000 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 2001 2002 if (assoc_data->ext_mld_capa_ops) { 2003 ml_elem->control |= 2004 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 2005 common->len += 2; 2006 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 2007 sizeof(assoc_data->ext_mld_capa_ops)); 2008 } 2009 2010 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2011 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 2012 const u8 *extra_elems; 2013 size_t extra_elems_len; 2014 size_t extra_used; 2015 u8 *subelem_len = NULL; 2016 __le16 ctrl; 2017 2018 if (!assoc_data->link[link_id].bss || 2019 link_id == assoc_data->assoc_link_id) 2020 continue; 2021 2022 extra_elems = assoc_data->link[link_id].elems; 2023 extra_elems_len = assoc_data->link[link_id].elems_len; 2024 2025 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2026 subelem_len = skb_put(skb, 1); 2027 2028 ctrl = cpu_to_le16(link_id | 2029 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2030 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2031 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2032 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2033 skb_put_data(skb, assoc_data->link[link_id].addr, 2034 ETH_ALEN); 2035 /* 2036 * Now add the contents of the (re)association request, 2037 * but the "listen interval" and "current AP address" 2038 * (if applicable) are skipped. So we only have 2039 * the capability field (remember the position and fill 2040 * later), followed by the elements added below by 2041 * calling ieee80211_add_link_elems(). 2042 */ 2043 capab_pos = skb_put(skb, 2); 2044 2045 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2046 ext_capa, 2047 extra_elems, 2048 extra_elems_len, 2049 link_id, NULL, 2050 link_present_elems, 2051 assoc_data); 2052 if (extra_elems) 2053 skb_put_data(skb, extra_elems + extra_used, 2054 extra_elems_len - extra_used); 2055 2056 put_unaligned_le16(capab, capab_pos); 2057 2058 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2059 link_present_elems); 2060 2061 ieee80211_fragment_element(skb, subelem_len, 2062 IEEE80211_MLE_SUBELEM_FRAGMENT); 2063 } 2064 2065 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2066 } 2067 2068 static int 2069 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2070 enum nl80211_iftype iftype, 2071 struct cfg80211_bss *cbss, 2072 size_t elems_len) 2073 { 2074 struct ieee80211_local *local = sdata->local; 2075 const struct ieee80211_sband_iftype_data *iftd; 2076 struct ieee80211_supported_band *sband; 2077 size_t size = 0; 2078 2079 if (!cbss) 2080 return size; 2081 2082 sband = local->hw.wiphy->bands[cbss->channel->band]; 2083 2084 /* add STA profile elements length */ 2085 size += elems_len; 2086 2087 /* and supported rates length */ 2088 size += 4 + sband->n_bitrates; 2089 2090 /* supported channels */ 2091 size += 2 + 2 * sband->n_channels; 2092 2093 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2094 if (iftd) 2095 size += iftd->vendor_elems.len; 2096 2097 /* power capability */ 2098 size += 4; 2099 2100 /* HT, VHT, HE, EHT */ 2101 size += 2 + sizeof(struct ieee80211_ht_cap); 2102 size += 2 + sizeof(struct ieee80211_vht_cap); 2103 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2104 sizeof(struct ieee80211_he_mcs_nss_supp) + 2105 IEEE80211_HE_PPE_THRES_MAX_LEN; 2106 2107 if (sband->band == NL80211_BAND_6GHZ) 2108 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2109 2110 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2111 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2112 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2113 2114 return size; 2115 } 2116 2117 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2118 { 2119 struct ieee80211_local *local = sdata->local; 2120 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2121 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2122 struct ieee80211_link_data *link; 2123 struct sk_buff *skb; 2124 struct ieee80211_mgmt *mgmt; 2125 u8 *pos, qos_info, *ie_start; 2126 size_t offset, noffset; 2127 u16 capab = 0, link_capab; 2128 __le16 listen_int; 2129 struct element *ext_capa = NULL; 2130 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2131 struct ieee80211_prep_tx_info info = {}; 2132 unsigned int link_id, n_links = 0; 2133 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2134 void *capab_pos; 2135 size_t size; 2136 int ret; 2137 2138 /* we know it's writable, cast away the const */ 2139 if (assoc_data->ie_len) 2140 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2141 assoc_data->ie, 2142 assoc_data->ie_len); 2143 2144 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2145 2146 size = local->hw.extra_tx_headroom + 2147 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2148 2 + assoc_data->ssid_len + /* SSID */ 2149 assoc_data->ie_len + /* extra IEs */ 2150 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2151 9; /* WMM */ 2152 2153 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2154 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2155 size_t elems_len = assoc_data->link[link_id].elems_len; 2156 2157 if (!cbss) 2158 continue; 2159 2160 n_links++; 2161 2162 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2163 elems_len); 2164 2165 /* non-inheritance element */ 2166 size += 2 + 2 + PRESENT_ELEMS_MAX; 2167 2168 /* should be the same across all BSSes */ 2169 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2170 capab |= WLAN_CAPABILITY_PRIVACY; 2171 } 2172 2173 if (ieee80211_vif_is_mld(&sdata->vif)) { 2174 /* consider the multi-link element with STA profile */ 2175 size += sizeof(struct ieee80211_multi_link_elem); 2176 /* max common info field in basic multi-link element */ 2177 size += sizeof(struct ieee80211_mle_basic_common_info) + 2178 2 + /* capa & op */ 2179 2 + /* ext capa & op */ 2180 2; /* EML capa */ 2181 2182 /* 2183 * The capability elements were already considered above; 2184 * note this over-estimates a bit because there's no 2185 * STA profile for the assoc link. 2186 */ 2187 size += (n_links - 1) * 2188 (1 + 1 + /* subelement ID/length */ 2189 2 + /* STA control */ 2190 1 + ETH_ALEN + 2 /* STA Info field */); 2191 } 2192 2193 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2194 if (WARN_ON(!link)) 2195 return -EINVAL; 2196 2197 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2198 return -EINVAL; 2199 2200 skb = alloc_skb(size, GFP_KERNEL); 2201 if (!skb) 2202 return -ENOMEM; 2203 2204 skb_reserve(skb, local->hw.extra_tx_headroom); 2205 2206 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2207 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2208 2209 /* Set MBSSID support for HE AP if needed */ 2210 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2211 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2212 ext_capa && ext_capa->datalen >= 3) 2213 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2214 2215 mgmt = skb_put_zero(skb, 24); 2216 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2217 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2218 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2219 2220 listen_int = cpu_to_le16(assoc_data->s1g ? 2221 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2222 local->hw.conf.listen_interval); 2223 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2224 skb_put(skb, 10); 2225 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2226 IEEE80211_STYPE_REASSOC_REQ); 2227 capab_pos = &mgmt->u.reassoc_req.capab_info; 2228 mgmt->u.reassoc_req.listen_interval = listen_int; 2229 memcpy(mgmt->u.reassoc_req.current_ap, 2230 assoc_data->prev_ap_addr, ETH_ALEN); 2231 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2232 } else { 2233 skb_put(skb, 4); 2234 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2235 IEEE80211_STYPE_ASSOC_REQ); 2236 capab_pos = &mgmt->u.assoc_req.capab_info; 2237 mgmt->u.assoc_req.listen_interval = listen_int; 2238 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2239 } 2240 2241 /* SSID */ 2242 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2243 ie_start = pos; 2244 *pos++ = WLAN_EID_SSID; 2245 *pos++ = assoc_data->ssid_len; 2246 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2247 2248 /* 2249 * This bit is technically reserved, so it shouldn't matter for either 2250 * the AP or us, but it also means we shouldn't set it. However, we've 2251 * always set it in the past, and apparently some EHT APs check that 2252 * we don't set it. To avoid interoperability issues with old APs that 2253 * for some reason check it and want it to be set, set the bit for all 2254 * pre-EHT connections as we used to do. 2255 */ 2256 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2257 !ieee80211_hw_check(&local->hw, STRICT)) 2258 capab |= WLAN_CAPABILITY_ESS; 2259 2260 /* add the elements for the assoc (main) link */ 2261 link_capab = capab; 2262 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2263 ext_capa, 2264 assoc_data->ie, 2265 assoc_data->ie_len, 2266 assoc_data->assoc_link_id, link, 2267 present_elems, assoc_data); 2268 put_unaligned_le16(link_capab, capab_pos); 2269 2270 /* if present, add any custom non-vendor IEs */ 2271 if (assoc_data->ie_len) { 2272 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2273 assoc_data->ie_len, 2274 offset); 2275 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2276 offset = noffset; 2277 } 2278 2279 if (assoc_data->wmm) { 2280 if (assoc_data->uapsd) { 2281 qos_info = ifmgd->uapsd_queues; 2282 qos_info |= (ifmgd->uapsd_max_sp_len << 2283 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2284 } else { 2285 qos_info = 0; 2286 } 2287 2288 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2289 } 2290 2291 /* add any remaining custom (i.e. vendor specific here) IEs */ 2292 if (assoc_data->ie_len) { 2293 noffset = assoc_data->ie_len; 2294 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2295 } 2296 2297 if (assoc_data->fils_kek_len) { 2298 ret = fils_encrypt_assoc_req(skb, assoc_data); 2299 if (ret < 0) { 2300 dev_kfree_skb(skb); 2301 return ret; 2302 } 2303 } 2304 2305 pos = skb_tail_pointer(skb); 2306 kfree(ifmgd->assoc_req_ies); 2307 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2308 if (!ifmgd->assoc_req_ies) { 2309 dev_kfree_skb(skb); 2310 return -ENOMEM; 2311 } 2312 2313 ifmgd->assoc_req_ies_len = pos - ie_start; 2314 2315 info.link_id = assoc_data->assoc_link_id; 2316 drv_mgd_prepare_tx(local, sdata, &info); 2317 2318 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2319 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2321 IEEE80211_TX_INTFL_MLME_CONN_TX; 2322 ieee80211_tx_skb(sdata, skb); 2323 2324 return 0; 2325 } 2326 2327 void ieee80211_send_pspoll(struct ieee80211_local *local, 2328 struct ieee80211_sub_if_data *sdata) 2329 { 2330 struct ieee80211_pspoll *pspoll; 2331 struct sk_buff *skb; 2332 2333 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2334 if (!skb) 2335 return; 2336 2337 pspoll = (struct ieee80211_pspoll *) skb->data; 2338 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2339 2340 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2341 ieee80211_tx_skb(sdata, skb); 2342 } 2343 2344 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2345 struct ieee80211_sub_if_data *sdata, 2346 bool powersave) 2347 { 2348 struct sk_buff *skb; 2349 struct ieee80211_hdr_3addr *nullfunc; 2350 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2351 2352 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2353 !ieee80211_hw_check(&local->hw, 2354 DOESNT_SUPPORT_QOS_NDP)); 2355 if (!skb) 2356 return; 2357 2358 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2359 if (powersave) 2360 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2361 2362 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2363 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2364 2365 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2366 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2367 2368 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2369 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2370 2371 ieee80211_tx_skb(sdata, skb); 2372 } 2373 2374 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2375 struct ieee80211_sub_if_data *sdata) 2376 { 2377 struct sk_buff *skb; 2378 struct ieee80211_hdr *nullfunc; 2379 __le16 fc; 2380 2381 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2382 return; 2383 2384 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2385 if (!skb) 2386 return; 2387 2388 skb_reserve(skb, local->hw.extra_tx_headroom); 2389 2390 nullfunc = skb_put_zero(skb, 30); 2391 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2392 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2393 nullfunc->frame_control = fc; 2394 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2395 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2396 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2397 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2398 2399 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2400 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2401 ieee80211_tx_skb(sdata, skb); 2402 } 2403 2404 /* spectrum management related things */ 2405 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2406 struct wiphy_work *work) 2407 { 2408 struct ieee80211_link_data *link = 2409 container_of(work, struct ieee80211_link_data, 2410 u.mgd.csa.switch_work.work); 2411 struct ieee80211_sub_if_data *sdata = link->sdata; 2412 struct ieee80211_local *local = sdata->local; 2413 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2414 int ret; 2415 2416 if (!ieee80211_sdata_running(sdata)) 2417 return; 2418 2419 lockdep_assert_wiphy(local->hw.wiphy); 2420 2421 if (!ifmgd->associated) 2422 return; 2423 2424 if (!link->conf->csa_active) 2425 return; 2426 2427 /* 2428 * If the link isn't active (now), we cannot wait for beacons, won't 2429 * have a reserved chanctx, etc. Just switch over the chandef and 2430 * update cfg80211 directly. 2431 */ 2432 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2433 struct link_sta_info *link_sta; 2434 struct sta_info *ap_sta; 2435 2436 link->conf->chanreq = link->csa.chanreq; 2437 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2438 link->link_id); 2439 link->conf->csa_active = false; 2440 2441 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2442 if (WARN_ON(!ap_sta)) 2443 return; 2444 2445 link_sta = wiphy_dereference(wiphy, 2446 ap_sta->link[link->link_id]); 2447 if (WARN_ON(!link_sta)) 2448 return; 2449 2450 link_sta->pub->bandwidth = 2451 _ieee80211_sta_cur_vht_bw(link_sta, 2452 &link->csa.chanreq.oper); 2453 return; 2454 } 2455 2456 /* 2457 * using reservation isn't immediate as it may be deferred until later 2458 * with multi-vif. once reservation is complete it will re-schedule the 2459 * work with no reserved_chanctx so verify chandef to check if it 2460 * completed successfully 2461 */ 2462 2463 if (link->reserved_chanctx) { 2464 /* 2465 * with multi-vif csa driver may call ieee80211_csa_finish() 2466 * many times while waiting for other interfaces to use their 2467 * reservations 2468 */ 2469 if (link->reserved_ready) 2470 return; 2471 2472 ret = ieee80211_link_use_reserved_context(link); 2473 if (ret) { 2474 link_info(link, 2475 "failed to use reserved channel context, disconnecting (err=%d)\n", 2476 ret); 2477 wiphy_work_queue(sdata->local->hw.wiphy, 2478 &ifmgd->csa_connection_drop_work); 2479 } 2480 return; 2481 } 2482 2483 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2484 &link->csa.chanreq)) { 2485 link_info(link, 2486 "failed to finalize channel switch, disconnecting\n"); 2487 wiphy_work_queue(sdata->local->hw.wiphy, 2488 &ifmgd->csa_connection_drop_work); 2489 return; 2490 } 2491 2492 link->u.mgd.csa.waiting_bcn = true; 2493 2494 /* apply new TPE restrictions immediately on the new channel */ 2495 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2496 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2497 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2498 &link->u.mgd.csa.ap_chandef, 2499 &link->conf->chanreq.oper); 2500 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2501 sizeof(link->u.mgd.csa.tpe))) { 2502 link->conf->tpe = link->u.mgd.csa.tpe; 2503 ieee80211_link_info_change_notify(sdata, link, 2504 BSS_CHANGED_TPE); 2505 } 2506 } 2507 2508 ieee80211_sta_reset_beacon_monitor(sdata); 2509 ieee80211_sta_reset_conn_monitor(sdata); 2510 } 2511 2512 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2513 { 2514 struct ieee80211_sub_if_data *sdata = link->sdata; 2515 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2516 int ret; 2517 2518 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2519 2520 WARN_ON(!link->conf->csa_active); 2521 2522 ieee80211_vif_unblock_queues_csa(sdata); 2523 2524 link->conf->csa_active = false; 2525 link->u.mgd.csa.blocked_tx = false; 2526 link->u.mgd.csa.waiting_bcn = false; 2527 2528 ret = drv_post_channel_switch(link); 2529 if (ret) { 2530 link_info(link, 2531 "driver post channel switch failed, disconnecting\n"); 2532 wiphy_work_queue(sdata->local->hw.wiphy, 2533 &ifmgd->csa_connection_drop_work); 2534 return; 2535 } 2536 2537 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2538 link->link_id); 2539 } 2540 2541 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2542 unsigned int link_id) 2543 { 2544 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2545 2546 trace_api_chswitch_done(sdata, success, link_id); 2547 2548 rcu_read_lock(); 2549 2550 if (!success) { 2551 sdata_info(sdata, 2552 "driver channel switch failed (link %d), disconnecting\n", 2553 link_id); 2554 wiphy_work_queue(sdata->local->hw.wiphy, 2555 &sdata->u.mgd.csa_connection_drop_work); 2556 } else { 2557 struct ieee80211_link_data *link = 2558 rcu_dereference(sdata->link[link_id]); 2559 2560 if (WARN_ON(!link)) { 2561 rcu_read_unlock(); 2562 return; 2563 } 2564 2565 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2566 &link->u.mgd.csa.switch_work, 0); 2567 } 2568 2569 rcu_read_unlock(); 2570 } 2571 EXPORT_SYMBOL(ieee80211_chswitch_done); 2572 2573 static void 2574 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2575 { 2576 struct ieee80211_sub_if_data *sdata = link->sdata; 2577 struct ieee80211_local *local = sdata->local; 2578 2579 lockdep_assert_wiphy(local->hw.wiphy); 2580 2581 if (!local->ops->abort_channel_switch) 2582 return; 2583 2584 if (rcu_access_pointer(link->conf->chanctx_conf)) 2585 ieee80211_link_unreserve_chanctx(link); 2586 2587 ieee80211_vif_unblock_queues_csa(sdata); 2588 2589 link->conf->csa_active = false; 2590 link->u.mgd.csa.blocked_tx = false; 2591 2592 drv_abort_channel_switch(link); 2593 } 2594 2595 struct sta_csa_rnr_iter_data { 2596 struct ieee80211_link_data *link; 2597 struct ieee80211_channel *chan; 2598 u8 mld_id; 2599 }; 2600 2601 static enum cfg80211_rnr_iter_ret 2602 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2603 const struct ieee80211_neighbor_ap_info *info, 2604 const u8 *tbtt_info, u8 tbtt_info_len) 2605 { 2606 struct sta_csa_rnr_iter_data *data = _data; 2607 struct ieee80211_link_data *link = data->link; 2608 struct ieee80211_sub_if_data *sdata = link->sdata; 2609 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2610 const struct ieee80211_tbtt_info_ge_11 *ti; 2611 enum nl80211_band band; 2612 unsigned int center_freq; 2613 int link_id; 2614 2615 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2616 return RNR_ITER_CONTINUE; 2617 2618 if (tbtt_info_len < sizeof(*ti)) 2619 return RNR_ITER_CONTINUE; 2620 2621 ti = (const void *)tbtt_info; 2622 2623 if (ti->mld_params.mld_id != data->mld_id) 2624 return RNR_ITER_CONTINUE; 2625 2626 link_id = le16_get_bits(ti->mld_params.params, 2627 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2628 if (link_id != data->link->link_id) 2629 return RNR_ITER_CONTINUE; 2630 2631 /* we found the entry for our link! */ 2632 2633 /* this AP is confused, it had this right before ... just disconnect */ 2634 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2635 link_info(link, 2636 "AP now has invalid operating class in RNR, disconnect\n"); 2637 wiphy_work_queue(sdata->local->hw.wiphy, 2638 &ifmgd->csa_connection_drop_work); 2639 return RNR_ITER_BREAK; 2640 } 2641 2642 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2643 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2644 2645 return RNR_ITER_BREAK; 2646 } 2647 2648 static void 2649 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2650 struct ieee802_11_elems *elems) 2651 { 2652 struct ieee80211_sub_if_data *sdata = link->sdata; 2653 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2654 struct sta_csa_rnr_iter_data data = { 2655 .link = link, 2656 }; 2657 2658 /* 2659 * If we get here, we see a beacon from another link without 2660 * CSA still being reported for it, so now we have to check 2661 * if the CSA was aborted or completed. This may not even be 2662 * perfectly possible if the CSA was only done for changing 2663 * the puncturing, but in that case if the link in inactive 2664 * we don't really care, and if it's an active link (or when 2665 * it's activated later) we'll get a beacon and adjust. 2666 */ 2667 2668 if (WARN_ON(!elems->ml_basic)) 2669 return; 2670 2671 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2672 2673 /* 2674 * So in order to do this, iterate the RNR element(s) and see 2675 * what channel is reported now. 2676 */ 2677 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2678 ieee80211_sta_csa_rnr_iter, &data); 2679 2680 if (!data.chan) { 2681 link_info(link, 2682 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2683 wiphy_work_queue(sdata->local->hw.wiphy, 2684 &ifmgd->csa_connection_drop_work); 2685 return; 2686 } 2687 2688 /* 2689 * If it doesn't match the CSA, then assume it aborted. This 2690 * may erroneously detect that it was _not_ aborted when it 2691 * was in fact aborted, but only changed the bandwidth or the 2692 * puncturing configuration, but we don't have enough data to 2693 * detect that. 2694 */ 2695 if (data.chan != link->csa.chanreq.oper.chan) 2696 ieee80211_sta_abort_chanswitch(link); 2697 } 2698 2699 enum ieee80211_csa_source { 2700 IEEE80211_CSA_SOURCE_BEACON, 2701 IEEE80211_CSA_SOURCE_OTHER_LINK, 2702 IEEE80211_CSA_SOURCE_PROT_ACTION, 2703 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2704 }; 2705 2706 static void 2707 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2708 u64 timestamp, u32 device_timestamp, 2709 struct ieee802_11_elems *full_elems, 2710 struct ieee802_11_elems *csa_elems, 2711 enum ieee80211_csa_source source) 2712 { 2713 struct ieee80211_sub_if_data *sdata = link->sdata; 2714 struct ieee80211_local *local = sdata->local; 2715 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2716 struct ieee80211_chanctx *chanctx = NULL; 2717 struct ieee80211_chanctx_conf *conf; 2718 struct ieee80211_csa_ie csa_ie = {}; 2719 struct ieee80211_channel_switch ch_switch = { 2720 .link_id = link->link_id, 2721 .timestamp = timestamp, 2722 .device_timestamp = device_timestamp, 2723 }; 2724 unsigned long now; 2725 int res; 2726 2727 lockdep_assert_wiphy(local->hw.wiphy); 2728 2729 if (csa_elems) { 2730 struct cfg80211_bss *cbss = link->conf->bss; 2731 enum nl80211_band current_band; 2732 struct ieee80211_bss *bss; 2733 2734 if (WARN_ON(!cbss)) 2735 return; 2736 2737 current_band = cbss->channel->band; 2738 bss = (void *)cbss->priv; 2739 2740 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2741 current_band, 2742 bss->vht_cap_info, 2743 &link->u.mgd.conn, 2744 link->u.mgd.bssid, 2745 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2746 &csa_ie); 2747 if (res == 0) { 2748 ch_switch.block_tx = csa_ie.mode; 2749 ch_switch.chandef = csa_ie.chanreq.oper; 2750 ch_switch.count = csa_ie.count; 2751 ch_switch.delay = csa_ie.max_switch_time; 2752 } 2753 2754 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2755 } else { 2756 /* 2757 * If there was no per-STA profile for this link, we 2758 * get called with csa_elems == NULL. This of course means 2759 * there are no CSA elements, so set res=1 indicating 2760 * no more CSA. 2761 */ 2762 res = 1; 2763 } 2764 2765 if (res < 0) { 2766 /* ignore this case, not a protected frame */ 2767 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2768 return; 2769 goto drop_connection; 2770 } 2771 2772 if (link->conf->csa_active) { 2773 switch (source) { 2774 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2775 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2776 /* already processing - disregard action frames */ 2777 return; 2778 case IEEE80211_CSA_SOURCE_BEACON: 2779 if (link->u.mgd.csa.waiting_bcn) { 2780 ieee80211_chswitch_post_beacon(link); 2781 /* 2782 * If the CSA is still present after the switch 2783 * we need to consider it as a new CSA (possibly 2784 * to self). This happens by not returning here 2785 * so we'll get to the check below. 2786 */ 2787 } else if (res) { 2788 ieee80211_sta_abort_chanswitch(link); 2789 return; 2790 } else { 2791 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2792 return; 2793 } 2794 break; 2795 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2796 /* active link: we want to see the beacon to continue */ 2797 if (ieee80211_vif_link_active(&sdata->vif, 2798 link->link_id)) 2799 return; 2800 2801 /* switch work ran, so just complete the process */ 2802 if (link->u.mgd.csa.waiting_bcn) { 2803 ieee80211_chswitch_post_beacon(link); 2804 /* 2805 * If the CSA is still present after the switch 2806 * we need to consider it as a new CSA (possibly 2807 * to self). This happens by not returning here 2808 * so we'll get to the check below. 2809 */ 2810 break; 2811 } 2812 2813 /* link still has CSA but we already know, do nothing */ 2814 if (!res) 2815 return; 2816 2817 /* check in the RNR if the CSA aborted */ 2818 ieee80211_sta_other_link_csa_disappeared(link, 2819 full_elems); 2820 return; 2821 } 2822 } 2823 2824 /* no active CSA nor a new one */ 2825 if (res) { 2826 /* 2827 * However, we may have stopped queues when receiving a public 2828 * action frame that couldn't be protected, if it had the quiet 2829 * bit set. This is a trade-off, we want to be quiet as soon as 2830 * possible, but also don't trust the public action frame much, 2831 * as it can't be protected. 2832 */ 2833 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2834 link->u.mgd.csa.blocked_tx = false; 2835 ieee80211_vif_unblock_queues_csa(sdata); 2836 } 2837 return; 2838 } 2839 2840 /* 2841 * We don't really trust public action frames, but block queues (go to 2842 * quiet mode) for them anyway, we should get a beacon soon to either 2843 * know what the CSA really is, or figure out the public action frame 2844 * was actually an attack. 2845 */ 2846 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2847 if (csa_ie.mode) { 2848 link->u.mgd.csa.blocked_tx = true; 2849 ieee80211_vif_block_queues_csa(sdata); 2850 } 2851 return; 2852 } 2853 2854 if (link->conf->chanreq.oper.chan->band != 2855 csa_ie.chanreq.oper.chan->band) { 2856 link_info(link, 2857 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2858 link->u.mgd.bssid, 2859 csa_ie.chanreq.oper.chan->center_freq, 2860 csa_ie.chanreq.oper.width, 2861 csa_ie.chanreq.oper.center_freq1, 2862 csa_ie.chanreq.oper.center_freq2); 2863 goto drop_connection; 2864 } 2865 2866 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2867 IEEE80211_CHAN_DISABLED)) { 2868 link_info(link, 2869 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2870 link->u.mgd.bssid, 2871 csa_ie.chanreq.oper.chan->center_freq, 2872 csa_ie.chanreq.oper.chan->freq_offset, 2873 csa_ie.chanreq.oper.width, 2874 csa_ie.chanreq.oper.center_freq1, 2875 csa_ie.chanreq.oper.freq1_offset, 2876 csa_ie.chanreq.oper.center_freq2); 2877 goto drop_connection; 2878 } 2879 2880 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2881 &link->conf->chanreq.oper) && 2882 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2883 if (link->u.mgd.csa.ignored_same_chan) 2884 return; 2885 link_info(link, 2886 "AP %pM tries to chanswitch to same channel, ignore\n", 2887 link->u.mgd.bssid); 2888 link->u.mgd.csa.ignored_same_chan = true; 2889 return; 2890 } 2891 2892 /* 2893 * Drop all TDLS peers on the affected link - either we disconnect or 2894 * move to a different channel from this point on. There's no telling 2895 * what our peer will do. 2896 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2897 * have an incompatible wider chandef. 2898 */ 2899 ieee80211_teardown_tdls_peers(link); 2900 2901 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2902 lockdep_is_held(&local->hw.wiphy->mtx)); 2903 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2904 link_info(link, 2905 "no channel context assigned to vif?, disconnecting\n"); 2906 goto drop_connection; 2907 } 2908 2909 if (conf) 2910 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2911 2912 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2913 link_info(link, 2914 "driver doesn't support chan-switch with channel contexts\n"); 2915 goto drop_connection; 2916 } 2917 2918 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2919 link_info(link, 2920 "preparing for channel switch failed, disconnecting\n"); 2921 goto drop_connection; 2922 } 2923 2924 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2925 2926 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2927 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2928 &csa_ie.chanreq.ap); 2929 2930 if (chanctx) { 2931 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2932 chanctx->mode, false); 2933 if (res) { 2934 link_info(link, 2935 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2936 res); 2937 goto drop_connection; 2938 } 2939 } 2940 2941 link->conf->csa_active = true; 2942 link->u.mgd.csa.ignored_same_chan = false; 2943 link->u.mgd.beacon_crc_valid = false; 2944 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2945 2946 if (csa_ie.mode) 2947 ieee80211_vif_block_queues_csa(sdata); 2948 2949 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2950 link->link_id, csa_ie.count, 2951 csa_ie.mode); 2952 2953 /* we may have to handle timeout for deactivated link in software */ 2954 now = jiffies; 2955 link->u.mgd.csa.time = now + 2956 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2957 link->conf->beacon_int); 2958 2959 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2960 local->ops->channel_switch) { 2961 /* 2962 * Use driver's channel switch callback, the driver will 2963 * later call ieee80211_chswitch_done(). It may deactivate 2964 * the link as well, we handle that elsewhere and queue 2965 * the csa.switch_work for the calculated time then. 2966 */ 2967 drv_channel_switch(local, sdata, &ch_switch); 2968 return; 2969 } 2970 2971 /* channel switch handled in software */ 2972 wiphy_delayed_work_queue(local->hw.wiphy, 2973 &link->u.mgd.csa.switch_work, 2974 link->u.mgd.csa.time - now); 2975 return; 2976 drop_connection: 2977 /* 2978 * This is just so that the disconnect flow will know that 2979 * we were trying to switch channel and failed. In case the 2980 * mode is 1 (we are not allowed to Tx), we will know not to 2981 * send a deauthentication frame. Those two fields will be 2982 * reset when the disconnection worker runs. 2983 */ 2984 link->conf->csa_active = true; 2985 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2986 2987 wiphy_work_queue(sdata->local->hw.wiphy, 2988 &ifmgd->csa_connection_drop_work); 2989 } 2990 2991 struct sta_bss_param_ch_cnt_data { 2992 struct ieee80211_sub_if_data *sdata; 2993 u8 reporting_link_id; 2994 u8 mld_id; 2995 }; 2996 2997 static enum cfg80211_rnr_iter_ret 2998 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2999 const struct ieee80211_neighbor_ap_info *info, 3000 const u8 *tbtt_info, u8 tbtt_info_len) 3001 { 3002 struct sta_bss_param_ch_cnt_data *data = _data; 3003 struct ieee80211_sub_if_data *sdata = data->sdata; 3004 const struct ieee80211_tbtt_info_ge_11 *ti; 3005 u8 bss_param_ch_cnt; 3006 int link_id; 3007 3008 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 3009 return RNR_ITER_CONTINUE; 3010 3011 if (tbtt_info_len < sizeof(*ti)) 3012 return RNR_ITER_CONTINUE; 3013 3014 ti = (const void *)tbtt_info; 3015 3016 if (ti->mld_params.mld_id != data->mld_id) 3017 return RNR_ITER_CONTINUE; 3018 3019 link_id = le16_get_bits(ti->mld_params.params, 3020 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3021 bss_param_ch_cnt = 3022 le16_get_bits(ti->mld_params.params, 3023 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3024 3025 if (bss_param_ch_cnt != 255 && 3026 link_id < ARRAY_SIZE(sdata->link)) { 3027 struct ieee80211_link_data *link = 3028 sdata_dereference(sdata->link[link_id], sdata); 3029 3030 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3031 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3032 link->conf->bss_param_ch_cnt_link_id = 3033 data->reporting_link_id; 3034 } 3035 } 3036 3037 return RNR_ITER_CONTINUE; 3038 } 3039 3040 static void 3041 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3042 struct ieee80211_bss_conf *bss_conf, 3043 struct ieee802_11_elems *elems) 3044 { 3045 struct sta_bss_param_ch_cnt_data data = { 3046 .reporting_link_id = bss_conf->link_id, 3047 .sdata = sdata, 3048 }; 3049 int bss_param_ch_cnt; 3050 3051 if (!elems->ml_basic) 3052 return; 3053 3054 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3055 3056 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3057 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3058 3059 bss_param_ch_cnt = 3060 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3061 3062 /* 3063 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3064 * didn't change to indicate that we got a beacon on our own 3065 * link. 3066 */ 3067 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3068 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3069 bss_conf->bss_param_ch_cnt_link_id = 3070 bss_conf->link_id; 3071 } 3072 } 3073 3074 static bool 3075 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3076 const u8 *country_ie, u8 country_ie_len, 3077 const u8 *pwr_constr_elem, 3078 int *chan_pwr, int *pwr_reduction) 3079 { 3080 struct ieee80211_country_ie_triplet *triplet; 3081 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3082 int i, chan_increment; 3083 bool have_chan_pwr = false; 3084 3085 /* Invalid IE */ 3086 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3087 return false; 3088 3089 triplet = (void *)(country_ie + 3); 3090 country_ie_len -= 3; 3091 3092 switch (channel->band) { 3093 default: 3094 WARN_ON_ONCE(1); 3095 fallthrough; 3096 case NL80211_BAND_2GHZ: 3097 case NL80211_BAND_60GHZ: 3098 case NL80211_BAND_LC: 3099 chan_increment = 1; 3100 break; 3101 case NL80211_BAND_5GHZ: 3102 chan_increment = 4; 3103 break; 3104 case NL80211_BAND_6GHZ: 3105 /* 3106 * In the 6 GHz band, the "maximum transmit power level" 3107 * field in the triplets is reserved, and thus will be 3108 * zero and we shouldn't use it to control TX power. 3109 * The actual TX power will be given in the transmit 3110 * power envelope element instead. 3111 */ 3112 return false; 3113 } 3114 3115 /* find channel */ 3116 while (country_ie_len >= 3) { 3117 u8 first_channel = triplet->chans.first_channel; 3118 3119 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3120 goto next; 3121 3122 for (i = 0; i < triplet->chans.num_channels; i++) { 3123 if (first_channel + i * chan_increment == chan) { 3124 have_chan_pwr = true; 3125 *chan_pwr = triplet->chans.max_power; 3126 break; 3127 } 3128 } 3129 if (have_chan_pwr) 3130 break; 3131 3132 next: 3133 triplet++; 3134 country_ie_len -= 3; 3135 } 3136 3137 if (have_chan_pwr && pwr_constr_elem) 3138 *pwr_reduction = *pwr_constr_elem; 3139 else 3140 *pwr_reduction = 0; 3141 3142 return have_chan_pwr; 3143 } 3144 3145 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3146 const u8 *cisco_dtpc_ie, 3147 int *pwr_level) 3148 { 3149 /* From practical testing, the first data byte of the DTPC element 3150 * seems to contain the requested dBm level, and the CLI on Cisco 3151 * APs clearly state the range is -127 to 127 dBm, which indicates 3152 * a signed byte, although it seemingly never actually goes negative. 3153 * The other byte seems to always be zero. 3154 */ 3155 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3156 } 3157 3158 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3159 struct ieee80211_channel *channel, 3160 struct ieee80211_mgmt *mgmt, 3161 const u8 *country_ie, u8 country_ie_len, 3162 const u8 *pwr_constr_ie, 3163 const u8 *cisco_dtpc_ie) 3164 { 3165 struct ieee80211_sub_if_data *sdata = link->sdata; 3166 bool has_80211h_pwr = false, has_cisco_pwr = false; 3167 int chan_pwr = 0, pwr_reduction_80211h = 0; 3168 int pwr_level_cisco, pwr_level_80211h; 3169 int new_ap_level; 3170 __le16 capab = mgmt->u.probe_resp.capab_info; 3171 3172 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3173 return 0; /* TODO */ 3174 3175 if (country_ie && 3176 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3177 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3178 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3179 channel, country_ie, country_ie_len, 3180 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3181 pwr_level_80211h = 3182 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3183 } 3184 3185 if (cisco_dtpc_ie) { 3186 ieee80211_find_cisco_dtpc( 3187 channel, cisco_dtpc_ie, &pwr_level_cisco); 3188 has_cisco_pwr = true; 3189 } 3190 3191 if (!has_80211h_pwr && !has_cisco_pwr) 3192 return 0; 3193 3194 /* If we have both 802.11h and Cisco DTPC, apply both limits 3195 * by picking the smallest of the two power levels advertised. 3196 */ 3197 if (has_80211h_pwr && 3198 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3199 new_ap_level = pwr_level_80211h; 3200 3201 if (link->ap_power_level == new_ap_level) 3202 return 0; 3203 3204 sdata_dbg(sdata, 3205 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3206 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3207 link->u.mgd.bssid); 3208 } else { /* has_cisco_pwr is always true here. */ 3209 new_ap_level = pwr_level_cisco; 3210 3211 if (link->ap_power_level == new_ap_level) 3212 return 0; 3213 3214 sdata_dbg(sdata, 3215 "Limiting TX power to %d dBm as advertised by %pM\n", 3216 pwr_level_cisco, link->u.mgd.bssid); 3217 } 3218 3219 link->ap_power_level = new_ap_level; 3220 if (__ieee80211_recalc_txpower(link)) 3221 return BSS_CHANGED_TXPOWER; 3222 return 0; 3223 } 3224 3225 /* powersave */ 3226 static void ieee80211_enable_ps(struct ieee80211_local *local, 3227 struct ieee80211_sub_if_data *sdata) 3228 { 3229 struct ieee80211_conf *conf = &local->hw.conf; 3230 3231 /* 3232 * If we are scanning right now then the parameters will 3233 * take effect when scan finishes. 3234 */ 3235 if (local->scanning) 3236 return; 3237 3238 if (conf->dynamic_ps_timeout > 0 && 3239 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3240 mod_timer(&local->dynamic_ps_timer, jiffies + 3241 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3242 } else { 3243 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3244 ieee80211_send_nullfunc(local, sdata, true); 3245 3246 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3247 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3248 return; 3249 3250 conf->flags |= IEEE80211_CONF_PS; 3251 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3252 } 3253 } 3254 3255 static void ieee80211_change_ps(struct ieee80211_local *local) 3256 { 3257 struct ieee80211_conf *conf = &local->hw.conf; 3258 3259 if (local->ps_sdata) { 3260 ieee80211_enable_ps(local, local->ps_sdata); 3261 } else if (conf->flags & IEEE80211_CONF_PS) { 3262 conf->flags &= ~IEEE80211_CONF_PS; 3263 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3264 timer_delete_sync(&local->dynamic_ps_timer); 3265 wiphy_work_cancel(local->hw.wiphy, 3266 &local->dynamic_ps_enable_work); 3267 } 3268 } 3269 3270 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3271 { 3272 struct ieee80211_local *local = sdata->local; 3273 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3274 struct sta_info *sta = NULL; 3275 bool authorized = false; 3276 3277 if (!mgd->powersave) 3278 return false; 3279 3280 if (mgd->broken_ap) 3281 return false; 3282 3283 if (!mgd->associated) 3284 return false; 3285 3286 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3287 return false; 3288 3289 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3290 !sdata->deflink.u.mgd.have_beacon) 3291 return false; 3292 3293 rcu_read_lock(); 3294 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3295 if (sta) 3296 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3297 rcu_read_unlock(); 3298 3299 return authorized; 3300 } 3301 3302 /* need to hold RTNL or interface lock */ 3303 void ieee80211_recalc_ps(struct ieee80211_local *local) 3304 { 3305 struct ieee80211_sub_if_data *sdata, *found = NULL; 3306 int count = 0; 3307 int timeout; 3308 3309 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3310 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3311 local->ps_sdata = NULL; 3312 return; 3313 } 3314 3315 list_for_each_entry(sdata, &local->interfaces, list) { 3316 if (!ieee80211_sdata_running(sdata)) 3317 continue; 3318 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3319 /* If an AP vif is found, then disable PS 3320 * by setting the count to zero thereby setting 3321 * ps_sdata to NULL. 3322 */ 3323 count = 0; 3324 break; 3325 } 3326 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3327 continue; 3328 found = sdata; 3329 count++; 3330 } 3331 3332 if (count == 1 && ieee80211_powersave_allowed(found)) { 3333 u8 dtimper = found->deflink.u.mgd.dtim_period; 3334 3335 timeout = local->dynamic_ps_forced_timeout; 3336 if (timeout < 0) 3337 timeout = 100; 3338 local->hw.conf.dynamic_ps_timeout = timeout; 3339 3340 /* If the TIM IE is invalid, pretend the value is 1 */ 3341 if (!dtimper) 3342 dtimper = 1; 3343 3344 local->hw.conf.ps_dtim_period = dtimper; 3345 local->ps_sdata = found; 3346 } else { 3347 local->ps_sdata = NULL; 3348 } 3349 3350 ieee80211_change_ps(local); 3351 } 3352 3353 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3354 { 3355 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3356 3357 if (sdata->vif.cfg.ps != ps_allowed) { 3358 sdata->vif.cfg.ps = ps_allowed; 3359 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3360 } 3361 } 3362 3363 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3364 struct wiphy_work *work) 3365 { 3366 struct ieee80211_local *local = 3367 container_of(work, struct ieee80211_local, 3368 dynamic_ps_disable_work); 3369 3370 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3371 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3372 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3373 } 3374 3375 ieee80211_wake_queues_by_reason(&local->hw, 3376 IEEE80211_MAX_QUEUE_MAP, 3377 IEEE80211_QUEUE_STOP_REASON_PS, 3378 false); 3379 } 3380 3381 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3382 struct wiphy_work *work) 3383 { 3384 struct ieee80211_local *local = 3385 container_of(work, struct ieee80211_local, 3386 dynamic_ps_enable_work); 3387 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3388 struct ieee80211_if_managed *ifmgd; 3389 unsigned long flags; 3390 int q; 3391 3392 /* can only happen when PS was just disabled anyway */ 3393 if (!sdata) 3394 return; 3395 3396 ifmgd = &sdata->u.mgd; 3397 3398 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3399 return; 3400 3401 if (local->hw.conf.dynamic_ps_timeout > 0) { 3402 /* don't enter PS if TX frames are pending */ 3403 if (drv_tx_frames_pending(local)) { 3404 mod_timer(&local->dynamic_ps_timer, jiffies + 3405 msecs_to_jiffies( 3406 local->hw.conf.dynamic_ps_timeout)); 3407 return; 3408 } 3409 3410 /* 3411 * transmission can be stopped by others which leads to 3412 * dynamic_ps_timer expiry. Postpone the ps timer if it 3413 * is not the actual idle state. 3414 */ 3415 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3416 for (q = 0; q < local->hw.queues; q++) { 3417 if (local->queue_stop_reasons[q]) { 3418 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3419 flags); 3420 mod_timer(&local->dynamic_ps_timer, jiffies + 3421 msecs_to_jiffies( 3422 local->hw.conf.dynamic_ps_timeout)); 3423 return; 3424 } 3425 } 3426 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3427 } 3428 3429 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3430 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3431 if (drv_tx_frames_pending(local)) { 3432 mod_timer(&local->dynamic_ps_timer, jiffies + 3433 msecs_to_jiffies( 3434 local->hw.conf.dynamic_ps_timeout)); 3435 } else { 3436 ieee80211_send_nullfunc(local, sdata, true); 3437 /* Flush to get the tx status of nullfunc frame */ 3438 ieee80211_flush_queues(local, sdata, false); 3439 } 3440 } 3441 3442 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3443 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3444 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3445 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3446 local->hw.conf.flags |= IEEE80211_CONF_PS; 3447 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3448 } 3449 } 3450 3451 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3452 { 3453 struct ieee80211_local *local = timer_container_of(local, t, 3454 dynamic_ps_timer); 3455 3456 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3457 } 3458 3459 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3460 { 3461 struct ieee80211_link_data *link = 3462 container_of(work, struct ieee80211_link_data, 3463 dfs_cac_timer_work.work); 3464 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3465 struct ieee80211_sub_if_data *sdata = link->sdata; 3466 3467 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3468 3469 if (sdata->wdev.links[link->link_id].cac_started) { 3470 ieee80211_link_release_channel(link); 3471 cfg80211_cac_event(sdata->dev, &chandef, 3472 NL80211_RADAR_CAC_FINISHED, 3473 GFP_KERNEL, link->link_id); 3474 } 3475 } 3476 3477 static bool 3478 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3479 { 3480 struct ieee80211_local *local = sdata->local; 3481 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3482 bool ret = false; 3483 int ac; 3484 3485 if (local->hw.queues < IEEE80211_NUM_ACS) 3486 return false; 3487 3488 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3489 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3490 int non_acm_ac; 3491 unsigned long now = jiffies; 3492 3493 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3494 tx_tspec->admitted_time && 3495 time_after(now, tx_tspec->time_slice_start + HZ)) { 3496 tx_tspec->consumed_tx_time = 0; 3497 tx_tspec->time_slice_start = now; 3498 3499 if (tx_tspec->downgraded) 3500 tx_tspec->action = 3501 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3502 } 3503 3504 switch (tx_tspec->action) { 3505 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3506 /* take the original parameters */ 3507 if (drv_conf_tx(local, &sdata->deflink, ac, 3508 &sdata->deflink.tx_conf[ac])) 3509 link_err(&sdata->deflink, 3510 "failed to set TX queue parameters for queue %d\n", 3511 ac); 3512 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3513 tx_tspec->downgraded = false; 3514 ret = true; 3515 break; 3516 case TX_TSPEC_ACTION_DOWNGRADE: 3517 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3518 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3519 ret = true; 3520 break; 3521 } 3522 /* downgrade next lower non-ACM AC */ 3523 for (non_acm_ac = ac + 1; 3524 non_acm_ac < IEEE80211_NUM_ACS; 3525 non_acm_ac++) 3526 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3527 break; 3528 /* Usually the loop will result in using BK even if it 3529 * requires admission control, but such a configuration 3530 * makes no sense and we have to transmit somehow - the 3531 * AC selection does the same thing. 3532 * If we started out trying to downgrade from BK, then 3533 * the extra condition here might be needed. 3534 */ 3535 if (non_acm_ac >= IEEE80211_NUM_ACS) 3536 non_acm_ac = IEEE80211_AC_BK; 3537 if (drv_conf_tx(local, &sdata->deflink, ac, 3538 &sdata->deflink.tx_conf[non_acm_ac])) 3539 link_err(&sdata->deflink, 3540 "failed to set TX queue parameters for queue %d\n", 3541 ac); 3542 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3543 ret = true; 3544 wiphy_delayed_work_queue(local->hw.wiphy, 3545 &ifmgd->tx_tspec_wk, 3546 tx_tspec->time_slice_start + 3547 HZ - now + 1); 3548 break; 3549 case TX_TSPEC_ACTION_NONE: 3550 /* nothing now */ 3551 break; 3552 } 3553 } 3554 3555 return ret; 3556 } 3557 3558 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3559 { 3560 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3561 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3562 BSS_CHANGED_QOS); 3563 } 3564 3565 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3566 struct wiphy_work *work) 3567 { 3568 struct ieee80211_sub_if_data *sdata; 3569 3570 sdata = container_of(work, struct ieee80211_sub_if_data, 3571 u.mgd.tx_tspec_wk.work); 3572 ieee80211_sta_handle_tspec_ac_params(sdata); 3573 } 3574 3575 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3576 { 3577 struct ieee80211_sub_if_data *sdata = link->sdata; 3578 struct ieee80211_local *local = sdata->local; 3579 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3580 struct ieee80211_tx_queue_params *params = link->tx_conf; 3581 u8 ac; 3582 3583 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3584 mlme_dbg(sdata, 3585 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3586 ac, params[ac].acm, 3587 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3588 params[ac].txop, params[ac].uapsd, 3589 ifmgd->tx_tspec[ac].downgraded); 3590 if (!ifmgd->tx_tspec[ac].downgraded && 3591 drv_conf_tx(local, link, ac, ¶ms[ac])) 3592 link_err(link, 3593 "failed to set TX queue parameters for AC %d\n", 3594 ac); 3595 } 3596 } 3597 3598 /* MLME */ 3599 static bool 3600 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3601 struct ieee80211_link_data *link, 3602 const u8 *wmm_param, size_t wmm_param_len, 3603 const struct ieee80211_mu_edca_param_set *mu_edca) 3604 { 3605 struct ieee80211_sub_if_data *sdata = link->sdata; 3606 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3607 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3608 size_t left; 3609 int count, mu_edca_count, ac; 3610 const u8 *pos; 3611 u8 uapsd_queues = 0; 3612 3613 if (!local->ops->conf_tx) 3614 return false; 3615 3616 if (local->hw.queues < IEEE80211_NUM_ACS) 3617 return false; 3618 3619 if (!wmm_param) 3620 return false; 3621 3622 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3623 return false; 3624 3625 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3626 uapsd_queues = ifmgd->uapsd_queues; 3627 3628 count = wmm_param[6] & 0x0f; 3629 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3630 * if mu_edca was preset before and now it disappeared tell 3631 * the driver about it. 3632 */ 3633 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3634 if (count == link->u.mgd.wmm_last_param_set && 3635 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3636 return false; 3637 link->u.mgd.wmm_last_param_set = count; 3638 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3639 3640 pos = wmm_param + 8; 3641 left = wmm_param_len - 8; 3642 3643 memset(¶ms, 0, sizeof(params)); 3644 3645 sdata->wmm_acm = 0; 3646 for (; left >= 4; left -= 4, pos += 4) { 3647 int aci = (pos[0] >> 5) & 0x03; 3648 int acm = (pos[0] >> 4) & 0x01; 3649 bool uapsd = false; 3650 3651 switch (aci) { 3652 case 1: /* AC_BK */ 3653 ac = IEEE80211_AC_BK; 3654 if (acm) 3655 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3656 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3657 uapsd = true; 3658 params[ac].mu_edca = !!mu_edca; 3659 if (mu_edca) 3660 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3661 break; 3662 case 2: /* AC_VI */ 3663 ac = IEEE80211_AC_VI; 3664 if (acm) 3665 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3666 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3667 uapsd = true; 3668 params[ac].mu_edca = !!mu_edca; 3669 if (mu_edca) 3670 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3671 break; 3672 case 3: /* AC_VO */ 3673 ac = IEEE80211_AC_VO; 3674 if (acm) 3675 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3676 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3677 uapsd = true; 3678 params[ac].mu_edca = !!mu_edca; 3679 if (mu_edca) 3680 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3681 break; 3682 case 0: /* AC_BE */ 3683 default: 3684 ac = IEEE80211_AC_BE; 3685 if (acm) 3686 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3687 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3688 uapsd = true; 3689 params[ac].mu_edca = !!mu_edca; 3690 if (mu_edca) 3691 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3692 break; 3693 } 3694 3695 params[ac].aifs = pos[0] & 0x0f; 3696 3697 if (params[ac].aifs < 2) { 3698 link_info(link, 3699 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3700 params[ac].aifs, aci); 3701 params[ac].aifs = 2; 3702 } 3703 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3704 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3705 params[ac].txop = get_unaligned_le16(pos + 2); 3706 params[ac].acm = acm; 3707 params[ac].uapsd = uapsd; 3708 3709 if (params[ac].cw_min == 0 || 3710 params[ac].cw_min > params[ac].cw_max) { 3711 link_info(link, 3712 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3713 params[ac].cw_min, params[ac].cw_max, aci); 3714 return false; 3715 } 3716 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3717 } 3718 3719 /* WMM specification requires all 4 ACIs. */ 3720 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3721 if (params[ac].cw_min == 0) { 3722 link_info(link, 3723 "AP has invalid WMM params (missing AC %d), using defaults\n", 3724 ac); 3725 return false; 3726 } 3727 } 3728 3729 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3730 link->tx_conf[ac] = params[ac]; 3731 3732 return true; 3733 } 3734 3735 static bool 3736 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3737 struct ieee80211_link_data *link, 3738 const u8 *wmm_param, size_t wmm_param_len, 3739 const struct ieee80211_mu_edca_param_set *mu_edca) 3740 { 3741 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3742 mu_edca)) 3743 return false; 3744 3745 ieee80211_mgd_set_link_qos_params(link); 3746 3747 /* enable WMM or activate new settings */ 3748 link->conf->qos = true; 3749 return true; 3750 } 3751 3752 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3753 { 3754 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3755 3756 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3757 ieee80211_run_deferred_scan(sdata->local); 3758 } 3759 3760 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3761 { 3762 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3763 3764 __ieee80211_stop_poll(sdata); 3765 } 3766 3767 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3768 u16 capab, bool erp_valid, u8 erp) 3769 { 3770 struct ieee80211_bss_conf *bss_conf = link->conf; 3771 struct ieee80211_supported_band *sband; 3772 u64 changed = 0; 3773 bool use_protection; 3774 bool use_short_preamble; 3775 bool use_short_slot; 3776 3777 sband = ieee80211_get_link_sband(link); 3778 if (!sband) 3779 return changed; 3780 3781 if (erp_valid) { 3782 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3783 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3784 } else { 3785 use_protection = false; 3786 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3787 } 3788 3789 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3790 if (sband->band == NL80211_BAND_5GHZ || 3791 sband->band == NL80211_BAND_6GHZ) 3792 use_short_slot = true; 3793 3794 if (use_protection != bss_conf->use_cts_prot) { 3795 bss_conf->use_cts_prot = use_protection; 3796 changed |= BSS_CHANGED_ERP_CTS_PROT; 3797 } 3798 3799 if (use_short_preamble != bss_conf->use_short_preamble) { 3800 bss_conf->use_short_preamble = use_short_preamble; 3801 changed |= BSS_CHANGED_ERP_PREAMBLE; 3802 } 3803 3804 if (use_short_slot != bss_conf->use_short_slot) { 3805 bss_conf->use_short_slot = use_short_slot; 3806 changed |= BSS_CHANGED_ERP_SLOT; 3807 } 3808 3809 return changed; 3810 } 3811 3812 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3813 struct cfg80211_bss *cbss) 3814 { 3815 struct ieee80211_sub_if_data *sdata = link->sdata; 3816 struct ieee80211_bss_conf *bss_conf = link->conf; 3817 struct ieee80211_bss *bss = (void *)cbss->priv; 3818 u64 changed = BSS_CHANGED_QOS; 3819 3820 /* not really used in MLO */ 3821 sdata->u.mgd.beacon_timeout = 3822 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3823 bss_conf->beacon_int)); 3824 3825 changed |= ieee80211_handle_bss_capability(link, 3826 bss_conf->assoc_capability, 3827 bss->has_erp_value, 3828 bss->erp_value); 3829 3830 ieee80211_check_rate_mask(link); 3831 3832 link->conf->bss = cbss; 3833 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3834 3835 if (sdata->vif.p2p || 3836 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3837 const struct cfg80211_bss_ies *ies; 3838 3839 rcu_read_lock(); 3840 ies = rcu_dereference(cbss->ies); 3841 if (ies) { 3842 int ret; 3843 3844 ret = cfg80211_get_p2p_attr( 3845 ies->data, ies->len, 3846 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3847 (u8 *) &bss_conf->p2p_noa_attr, 3848 sizeof(bss_conf->p2p_noa_attr)); 3849 if (ret >= 2) { 3850 link->u.mgd.p2p_noa_index = 3851 bss_conf->p2p_noa_attr.index; 3852 changed |= BSS_CHANGED_P2P_PS; 3853 } 3854 } 3855 rcu_read_unlock(); 3856 } 3857 3858 if (link->u.mgd.have_beacon) { 3859 bss_conf->beacon_rate = bss->beacon_rate; 3860 changed |= BSS_CHANGED_BEACON_INFO; 3861 } else { 3862 bss_conf->beacon_rate = NULL; 3863 } 3864 3865 /* Tell the driver to monitor connection quality (if supported) */ 3866 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3867 bss_conf->cqm_rssi_thold) 3868 changed |= BSS_CHANGED_CQM; 3869 3870 return changed; 3871 } 3872 3873 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3874 struct ieee80211_mgd_assoc_data *assoc_data, 3875 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3876 { 3877 struct ieee80211_local *local = sdata->local; 3878 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3879 u64 vif_changed = BSS_CHANGED_ASSOC; 3880 unsigned int link_id; 3881 3882 lockdep_assert_wiphy(local->hw.wiphy); 3883 3884 sdata->u.mgd.associated = true; 3885 3886 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3887 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3888 struct ieee80211_link_data *link; 3889 3890 if (!cbss || 3891 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3892 continue; 3893 3894 if (ieee80211_vif_is_mld(&sdata->vif) && 3895 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3896 continue; 3897 3898 link = sdata_dereference(sdata->link[link_id], sdata); 3899 if (WARN_ON(!link)) 3900 return; 3901 3902 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3903 } 3904 3905 /* just to be sure */ 3906 ieee80211_stop_poll(sdata); 3907 3908 ieee80211_led_assoc(local, 1); 3909 3910 vif_cfg->assoc = 1; 3911 3912 /* Enable ARP filtering */ 3913 if (vif_cfg->arp_addr_cnt) 3914 vif_changed |= BSS_CHANGED_ARP_FILTER; 3915 3916 if (ieee80211_vif_is_mld(&sdata->vif)) { 3917 for (link_id = 0; 3918 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3919 link_id++) { 3920 struct ieee80211_link_data *link; 3921 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3922 3923 if (!cbss || 3924 !(BIT(link_id) & 3925 ieee80211_vif_usable_links(&sdata->vif)) || 3926 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3927 continue; 3928 3929 link = sdata_dereference(sdata->link[link_id], sdata); 3930 if (WARN_ON(!link)) 3931 return; 3932 3933 ieee80211_link_info_change_notify(sdata, link, 3934 changed[link_id]); 3935 3936 ieee80211_recalc_smps(sdata, link); 3937 } 3938 3939 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3940 } else { 3941 ieee80211_bss_info_change_notify(sdata, 3942 vif_changed | changed[0]); 3943 } 3944 3945 ieee80211_recalc_ps(local); 3946 3947 /* leave this here to not change ordering in non-MLO cases */ 3948 if (!ieee80211_vif_is_mld(&sdata->vif)) 3949 ieee80211_recalc_smps(sdata, &sdata->deflink); 3950 ieee80211_recalc_ps_vif(sdata); 3951 3952 netif_carrier_on(sdata->dev); 3953 } 3954 3955 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3956 { 3957 struct ieee80211_mgd_assoc_data *add_links_data = 3958 sdata->u.mgd.reconf.add_links_data; 3959 3960 if (!ieee80211_vif_is_mld(&sdata->vif) || 3961 !(sdata->u.mgd.reconf.added_links | 3962 sdata->u.mgd.reconf.removed_links)) 3963 return; 3964 3965 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3966 &sdata->u.mgd.reconf.wk); 3967 sdata->u.mgd.reconf.added_links = 0; 3968 sdata->u.mgd.reconf.removed_links = 0; 3969 sdata->u.mgd.reconf.dialog_token = 0; 3970 3971 if (add_links_data) { 3972 struct cfg80211_mlo_reconf_done_data done_data = {}; 3973 u8 link_id; 3974 3975 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3976 link_id++) 3977 done_data.links[link_id].bss = 3978 add_links_data->link[link_id].bss; 3979 3980 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 3981 3982 kfree(sdata->u.mgd.reconf.add_links_data); 3983 sdata->u.mgd.reconf.add_links_data = NULL; 3984 } 3985 } 3986 3987 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3988 u16 stype, u16 reason, bool tx, 3989 u8 *frame_buf) 3990 { 3991 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3992 struct ieee80211_local *local = sdata->local; 3993 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3994 unsigned int link_id; 3995 u64 changed = 0; 3996 struct ieee80211_prep_tx_info info = { 3997 .subtype = stype, 3998 .was_assoc = true, 3999 .link_id = ffs(sdata->vif.active_links) - 1, 4000 }; 4001 4002 lockdep_assert_wiphy(local->hw.wiphy); 4003 4004 if (frame_buf) 4005 memset(frame_buf, 0, IEEE80211_DEAUTH_FRAME_LEN); 4006 4007 if (WARN_ON(!ap_sta)) 4008 return; 4009 4010 if (WARN_ON_ONCE(tx && !frame_buf)) 4011 return; 4012 4013 if (WARN_ON(!ifmgd->associated)) 4014 return; 4015 4016 ieee80211_stop_poll(sdata); 4017 4018 ifmgd->associated = false; 4019 4020 if (tx) { 4021 bool tx_link_found = false; 4022 4023 for (link_id = 0; 4024 link_id < ARRAY_SIZE(sdata->link); 4025 link_id++) { 4026 struct ieee80211_link_data *link; 4027 4028 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4029 continue; 4030 4031 link = sdata_dereference(sdata->link[link_id], sdata); 4032 if (WARN_ON_ONCE(!link)) 4033 continue; 4034 4035 if (link->u.mgd.csa.blocked_tx) 4036 continue; 4037 4038 tx_link_found = true; 4039 break; 4040 } 4041 4042 tx = tx_link_found; 4043 } 4044 4045 /* other links will be destroyed */ 4046 sdata->deflink.conf->bss = NULL; 4047 sdata->deflink.conf->epcs_support = false; 4048 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4049 4050 netif_carrier_off(sdata->dev); 4051 4052 /* 4053 * if we want to get out of ps before disassoc (why?) we have 4054 * to do it before sending disassoc, as otherwise the null-packet 4055 * won't be valid. 4056 */ 4057 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4058 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4059 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4060 } 4061 local->ps_sdata = NULL; 4062 4063 /* disable per-vif ps */ 4064 ieee80211_recalc_ps_vif(sdata); 4065 4066 /* make sure ongoing transmission finishes */ 4067 synchronize_net(); 4068 4069 /* 4070 * drop any frame before deauth/disassoc, this can be data or 4071 * management frame. Since we are disconnecting, we should not 4072 * insist sending these frames which can take time and delay 4073 * the disconnection and possible the roaming. 4074 */ 4075 ieee80211_flush_queues(local, sdata, true); 4076 4077 if (tx) { 4078 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4079 4080 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4081 sdata->vif.cfg.ap_addr, stype, 4082 reason, true, frame_buf); 4083 4084 /* flush out frame - make sure the deauth was actually sent */ 4085 ieee80211_flush_queues(local, sdata, false); 4086 4087 drv_mgd_complete_tx(sdata->local, sdata, &info); 4088 } else if (frame_buf) { 4089 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4090 sdata->vif.cfg.ap_addr, stype, 4091 reason, false, frame_buf); 4092 } 4093 4094 /* clear AP addr only after building the needed mgmt frames */ 4095 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4096 eth_zero_addr(sdata->vif.cfg.ap_addr); 4097 4098 sdata->vif.cfg.ssid_len = 0; 4099 4100 /* Remove TDLS peers */ 4101 __sta_info_flush(sdata, false, -1, ap_sta); 4102 4103 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4104 /* Only move the AP state */ 4105 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4106 } else { 4107 /* Remove AP peer */ 4108 sta_info_flush(sdata, -1); 4109 } 4110 4111 /* finally reset all BSS / config parameters */ 4112 if (!ieee80211_vif_is_mld(&sdata->vif)) 4113 changed |= ieee80211_reset_erp_info(sdata); 4114 4115 ieee80211_led_assoc(local, 0); 4116 changed |= BSS_CHANGED_ASSOC; 4117 sdata->vif.cfg.assoc = false; 4118 4119 sdata->deflink.u.mgd.p2p_noa_index = -1; 4120 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4121 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4122 4123 /* on the next assoc, re-program HT/VHT parameters */ 4124 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4125 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4126 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4127 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4128 4129 /* 4130 * reset MU-MIMO ownership and group data in default link, 4131 * if used, other links are destroyed 4132 */ 4133 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4134 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4135 memset(sdata->vif.bss_conf.mu_group.position, 0, 4136 sizeof(sdata->vif.bss_conf.mu_group.position)); 4137 if (!ieee80211_vif_is_mld(&sdata->vif)) 4138 changed |= BSS_CHANGED_MU_GROUPS; 4139 sdata->vif.bss_conf.mu_mimo_owner = false; 4140 4141 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4142 4143 timer_delete_sync(&local->dynamic_ps_timer); 4144 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4145 4146 /* Disable ARP filtering */ 4147 if (sdata->vif.cfg.arp_addr_cnt) 4148 changed |= BSS_CHANGED_ARP_FILTER; 4149 4150 sdata->vif.bss_conf.qos = false; 4151 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4152 changed |= BSS_CHANGED_QOS; 4153 /* The BSSID (not really interesting) and HT changed */ 4154 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4155 ieee80211_bss_info_change_notify(sdata, changed); 4156 } else { 4157 ieee80211_vif_cfg_change_notify(sdata, changed); 4158 } 4159 4160 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4161 /* 4162 * After notifying the driver about the disassoc, 4163 * remove the ap sta. 4164 */ 4165 sta_info_flush(sdata, -1); 4166 } 4167 4168 /* disassociated - set to defaults now */ 4169 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4170 4171 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4172 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4173 timer_delete_sync(&sdata->u.mgd.timer); 4174 4175 sdata->vif.bss_conf.dtim_period = 0; 4176 sdata->vif.bss_conf.beacon_rate = NULL; 4177 4178 sdata->deflink.u.mgd.have_beacon = false; 4179 sdata->deflink.u.mgd.tracking_signal_avg = false; 4180 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4181 4182 ifmgd->flags = 0; 4183 4184 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4185 struct ieee80211_link_data *link; 4186 4187 link = sdata_dereference(sdata->link[link_id], sdata); 4188 if (!link) 4189 continue; 4190 ieee80211_link_release_channel(link); 4191 } 4192 4193 sdata->vif.bss_conf.csa_active = false; 4194 sdata->deflink.u.mgd.csa.blocked_tx = false; 4195 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4196 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4197 ieee80211_vif_unblock_queues_csa(sdata); 4198 4199 /* existing TX TSPEC sessions no longer exist */ 4200 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4201 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4202 4203 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4204 sdata->vif.bss_conf.pwr_reduction = 0; 4205 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4206 4207 sdata->vif.cfg.eml_cap = 0; 4208 sdata->vif.cfg.eml_med_sync_delay = 0; 4209 sdata->vif.cfg.mld_capa_op = 0; 4210 4211 memset(&sdata->u.mgd.ttlm_info, 0, 4212 sizeof(sdata->u.mgd.ttlm_info)); 4213 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4214 4215 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4216 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4217 &ifmgd->neg_ttlm_timeout_work); 4218 4219 sdata->u.mgd.removed_links = 0; 4220 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4221 &sdata->u.mgd.ml_reconf_work); 4222 4223 wiphy_work_cancel(sdata->local->hw.wiphy, 4224 &ifmgd->teardown_ttlm_work); 4225 4226 /* if disconnection happens in the middle of the ML reconfiguration 4227 * flow, cfg80211 must called to release the BSS references obtained 4228 * when the flow started. 4229 */ 4230 ieee80211_ml_reconf_reset(sdata); 4231 4232 ieee80211_vif_set_links(sdata, 0, 0); 4233 4234 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4235 4236 ifmgd->epcs.enabled = false; 4237 ifmgd->epcs.dialog_token = 0; 4238 4239 memset(ifmgd->userspace_selectors, 0, 4240 sizeof(ifmgd->userspace_selectors)); 4241 } 4242 4243 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4244 { 4245 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4246 struct ieee80211_local *local = sdata->local; 4247 4248 lockdep_assert_wiphy(local->hw.wiphy); 4249 4250 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4251 return; 4252 4253 __ieee80211_stop_poll(sdata); 4254 4255 ieee80211_recalc_ps(local); 4256 4257 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4258 return; 4259 4260 /* 4261 * We've received a probe response, but are not sure whether 4262 * we have or will be receiving any beacons or data, so let's 4263 * schedule the timers again, just in case. 4264 */ 4265 ieee80211_sta_reset_beacon_monitor(sdata); 4266 4267 mod_timer(&ifmgd->conn_mon_timer, 4268 round_jiffies_up(jiffies + 4269 IEEE80211_CONNECTION_IDLE_TIME)); 4270 } 4271 4272 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4273 struct ieee80211_hdr *hdr, 4274 u16 tx_time) 4275 { 4276 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4277 u16 tid; 4278 int ac; 4279 struct ieee80211_sta_tx_tspec *tx_tspec; 4280 unsigned long now = jiffies; 4281 4282 if (!ieee80211_is_data_qos(hdr->frame_control)) 4283 return; 4284 4285 tid = ieee80211_get_tid(hdr); 4286 ac = ieee80211_ac_from_tid(tid); 4287 tx_tspec = &ifmgd->tx_tspec[ac]; 4288 4289 if (likely(!tx_tspec->admitted_time)) 4290 return; 4291 4292 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4293 tx_tspec->consumed_tx_time = 0; 4294 tx_tspec->time_slice_start = now; 4295 4296 if (tx_tspec->downgraded) { 4297 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4298 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4299 &ifmgd->tx_tspec_wk, 0); 4300 } 4301 } 4302 4303 if (tx_tspec->downgraded) 4304 return; 4305 4306 tx_tspec->consumed_tx_time += tx_time; 4307 4308 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4309 tx_tspec->downgraded = true; 4310 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4311 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4312 &ifmgd->tx_tspec_wk, 0); 4313 } 4314 } 4315 4316 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4317 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4318 { 4319 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4320 4321 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4322 !sdata->u.mgd.probe_send_count) 4323 return; 4324 4325 if (ack) 4326 sdata->u.mgd.probe_send_count = 0; 4327 else 4328 sdata->u.mgd.nullfunc_failed = true; 4329 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4330 } 4331 4332 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4333 const u8 *src, const u8 *dst, 4334 const u8 *ssid, size_t ssid_len, 4335 struct ieee80211_channel *channel) 4336 { 4337 struct sk_buff *skb; 4338 4339 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4340 ssid, ssid_len, NULL, 0, 4341 IEEE80211_PROBE_FLAG_DIRECTED); 4342 if (skb) 4343 ieee80211_tx_skb(sdata, skb); 4344 } 4345 4346 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4347 { 4348 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4349 u8 *dst = sdata->vif.cfg.ap_addr; 4350 u8 unicast_limit = max(1, max_probe_tries - 3); 4351 struct sta_info *sta; 4352 4353 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4354 4355 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 4356 return; 4357 4358 /* 4359 * Try sending broadcast probe requests for the last three 4360 * probe requests after the first ones failed since some 4361 * buggy APs only support broadcast probe requests. 4362 */ 4363 if (ifmgd->probe_send_count >= unicast_limit) 4364 dst = NULL; 4365 4366 /* 4367 * When the hardware reports an accurate Tx ACK status, it's 4368 * better to send a nullfunc frame instead of a probe request, 4369 * as it will kick us off the AP quickly if we aren't associated 4370 * anymore. The timeout will be reset if the frame is ACKed by 4371 * the AP. 4372 */ 4373 ifmgd->probe_send_count++; 4374 4375 if (dst) { 4376 sta = sta_info_get(sdata, dst); 4377 if (!WARN_ON(!sta)) 4378 ieee80211_check_fast_rx(sta); 4379 } 4380 4381 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4382 ifmgd->nullfunc_failed = false; 4383 ieee80211_send_nullfunc(sdata->local, sdata, false); 4384 } else { 4385 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4386 sdata->vif.cfg.ssid, 4387 sdata->vif.cfg.ssid_len, 4388 sdata->deflink.conf->bss->channel); 4389 } 4390 4391 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4392 run_again(sdata, ifmgd->probe_timeout); 4393 } 4394 4395 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4396 bool beacon) 4397 { 4398 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4399 bool already = false; 4400 4401 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4402 4403 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 4404 return; 4405 4406 if (!ieee80211_sdata_running(sdata)) 4407 return; 4408 4409 if (!ifmgd->associated) 4410 return; 4411 4412 if (sdata->local->tmp_channel || sdata->local->scanning) 4413 return; 4414 4415 if (sdata->local->suspending) { 4416 /* reschedule after resume */ 4417 ieee80211_reset_ap_probe(sdata); 4418 return; 4419 } 4420 4421 if (beacon) { 4422 mlme_dbg_ratelimited(sdata, 4423 "detected beacon loss from AP (missed %d beacons) - probing\n", 4424 beacon_loss_count); 4425 4426 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4427 } 4428 4429 /* 4430 * The driver/our work has already reported this event or the 4431 * connection monitoring has kicked in and we have already sent 4432 * a probe request. Or maybe the AP died and the driver keeps 4433 * reporting until we disassociate... 4434 * 4435 * In either case we have to ignore the current call to this 4436 * function (except for setting the correct probe reason bit) 4437 * because otherwise we would reset the timer every time and 4438 * never check whether we received a probe response! 4439 */ 4440 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4441 already = true; 4442 4443 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4444 4445 if (already) 4446 return; 4447 4448 ieee80211_recalc_ps(sdata->local); 4449 4450 ifmgd->probe_send_count = 0; 4451 ieee80211_mgd_probe_ap_send(sdata); 4452 } 4453 4454 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4455 struct ieee80211_vif *vif) 4456 { 4457 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4458 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4459 struct cfg80211_bss *cbss; 4460 struct sk_buff *skb; 4461 const struct element *ssid; 4462 int ssid_len; 4463 4464 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4465 4466 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4467 ieee80211_vif_is_mld(&sdata->vif))) 4468 return NULL; 4469 4470 if (ifmgd->associated) 4471 cbss = sdata->deflink.conf->bss; 4472 else if (ifmgd->auth_data) 4473 cbss = ifmgd->auth_data->bss; 4474 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4475 cbss = ifmgd->assoc_data->link[0].bss; 4476 else 4477 return NULL; 4478 4479 rcu_read_lock(); 4480 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4481 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4482 "invalid SSID element (len=%d)", 4483 ssid ? ssid->datalen : -1)) 4484 ssid_len = 0; 4485 else 4486 ssid_len = ssid->datalen; 4487 4488 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4489 (u32) -1, cbss->channel, 4490 ssid->data, ssid_len, 4491 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4492 rcu_read_unlock(); 4493 4494 return skb; 4495 } 4496 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4497 4498 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4499 const u8 *buf, size_t len, bool tx, 4500 u16 reason, bool reconnect) 4501 { 4502 struct ieee80211_event event = { 4503 .type = MLME_EVENT, 4504 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4505 .u.mlme.reason = reason, 4506 }; 4507 4508 if (tx) 4509 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4510 else 4511 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4512 4513 drv_event_callback(sdata->local, sdata, &event); 4514 } 4515 4516 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4517 { 4518 struct ieee80211_local *local = sdata->local; 4519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4520 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4521 4522 lockdep_assert_wiphy(local->hw.wiphy); 4523 4524 if (!ifmgd->associated) 4525 return; 4526 4527 if (!ifmgd->driver_disconnect) { 4528 unsigned int link_id; 4529 4530 /* 4531 * AP is probably out of range (or not reachable for another 4532 * reason) so remove the bss structs for that AP. In the case 4533 * of multi-link, it's not clear that all of them really are 4534 * out of range, but if they weren't the driver likely would 4535 * have switched to just have a single link active? 4536 */ 4537 for (link_id = 0; 4538 link_id < ARRAY_SIZE(sdata->link); 4539 link_id++) { 4540 struct ieee80211_link_data *link; 4541 4542 link = sdata_dereference(sdata->link[link_id], sdata); 4543 if (!link || !link->conf->bss) 4544 continue; 4545 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4546 link->conf->bss = NULL; 4547 } 4548 } 4549 4550 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4551 ifmgd->driver_disconnect ? 4552 WLAN_REASON_DEAUTH_LEAVING : 4553 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4554 true, frame_buf); 4555 /* the other links will be destroyed */ 4556 sdata->vif.bss_conf.csa_active = false; 4557 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4558 sdata->deflink.u.mgd.csa.blocked_tx = false; 4559 ieee80211_vif_unblock_queues_csa(sdata); 4560 4561 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4562 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4563 ifmgd->reconnect); 4564 ifmgd->reconnect = false; 4565 } 4566 4567 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4568 struct wiphy_work *work) 4569 { 4570 struct ieee80211_sub_if_data *sdata = 4571 container_of(work, struct ieee80211_sub_if_data, 4572 u.mgd.beacon_connection_loss_work); 4573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4574 4575 if (ifmgd->connection_loss) { 4576 sdata_info(sdata, "Connection to AP %pM lost\n", 4577 sdata->vif.cfg.ap_addr); 4578 __ieee80211_disconnect(sdata); 4579 ifmgd->connection_loss = false; 4580 } else if (ifmgd->driver_disconnect) { 4581 sdata_info(sdata, 4582 "Driver requested disconnection from AP %pM\n", 4583 sdata->vif.cfg.ap_addr); 4584 __ieee80211_disconnect(sdata); 4585 ifmgd->driver_disconnect = false; 4586 } else { 4587 if (ifmgd->associated) 4588 sdata->deflink.u.mgd.beacon_loss_count++; 4589 ieee80211_mgd_probe_ap(sdata, true); 4590 } 4591 } 4592 4593 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4594 struct wiphy_work *work) 4595 { 4596 struct ieee80211_sub_if_data *sdata = 4597 container_of(work, struct ieee80211_sub_if_data, 4598 u.mgd.csa_connection_drop_work); 4599 4600 __ieee80211_disconnect(sdata); 4601 } 4602 4603 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4604 { 4605 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4606 struct ieee80211_hw *hw = &sdata->local->hw; 4607 4608 trace_api_beacon_loss(sdata); 4609 4610 sdata->u.mgd.connection_loss = false; 4611 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4612 } 4613 EXPORT_SYMBOL(ieee80211_beacon_loss); 4614 4615 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4616 { 4617 struct ieee80211_sub_if_data *sdata; 4618 struct ieee80211_hw *hw; 4619 4620 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4621 4622 sdata = vif_to_sdata(vif); 4623 hw = &sdata->local->hw; 4624 4625 trace_api_connection_loss(sdata); 4626 4627 sdata->u.mgd.connection_loss = true; 4628 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4629 } 4630 EXPORT_SYMBOL(ieee80211_connection_loss); 4631 4632 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4633 { 4634 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4635 struct ieee80211_hw *hw = &sdata->local->hw; 4636 4637 trace_api_disconnect(sdata, reconnect); 4638 4639 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4640 return; 4641 4642 sdata->u.mgd.driver_disconnect = true; 4643 sdata->u.mgd.reconnect = reconnect; 4644 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4645 } 4646 EXPORT_SYMBOL(ieee80211_disconnect); 4647 4648 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4649 bool assoc) 4650 { 4651 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4652 4653 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4654 4655 sdata->u.mgd.auth_data = NULL; 4656 4657 if (!assoc) { 4658 /* 4659 * we are not authenticated yet, the only timer that could be 4660 * running is the timeout for the authentication response which 4661 * which is not relevant anymore. 4662 */ 4663 timer_delete_sync(&sdata->u.mgd.timer); 4664 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4665 4666 /* other links are destroyed */ 4667 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4668 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4669 BSS_CHANGED_BSSID); 4670 sdata->u.mgd.flags = 0; 4671 4672 ieee80211_link_release_channel(&sdata->deflink); 4673 ieee80211_vif_set_links(sdata, 0, 0); 4674 } 4675 4676 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4677 kfree(auth_data); 4678 } 4679 4680 enum assoc_status { 4681 ASSOC_SUCCESS, 4682 ASSOC_REJECTED, 4683 ASSOC_TIMEOUT, 4684 ASSOC_ABANDON, 4685 }; 4686 4687 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4688 enum assoc_status status) 4689 { 4690 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4691 4692 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4693 4694 sdata->u.mgd.assoc_data = NULL; 4695 4696 if (status != ASSOC_SUCCESS) { 4697 /* 4698 * we are not associated yet, the only timer that could be 4699 * running is the timeout for the association response which 4700 * which is not relevant anymore. 4701 */ 4702 timer_delete_sync(&sdata->u.mgd.timer); 4703 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4704 4705 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4706 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4707 BSS_CHANGED_BSSID); 4708 sdata->u.mgd.flags = 0; 4709 sdata->vif.bss_conf.mu_mimo_owner = false; 4710 4711 if (status != ASSOC_REJECTED) { 4712 struct cfg80211_assoc_failure data = { 4713 .timeout = status == ASSOC_TIMEOUT, 4714 }; 4715 int i; 4716 4717 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4718 ARRAY_SIZE(assoc_data->link)); 4719 4720 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4721 data.bss[i] = assoc_data->link[i].bss; 4722 4723 if (ieee80211_vif_is_mld(&sdata->vif)) 4724 data.ap_mld_addr = assoc_data->ap_addr; 4725 4726 cfg80211_assoc_failure(sdata->dev, &data); 4727 } 4728 4729 ieee80211_link_release_channel(&sdata->deflink); 4730 ieee80211_vif_set_links(sdata, 0, 0); 4731 } 4732 4733 kfree(assoc_data); 4734 } 4735 4736 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4737 struct ieee80211_mgmt *mgmt, size_t len) 4738 { 4739 struct ieee80211_local *local = sdata->local; 4740 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4741 const struct element *challenge; 4742 u8 *pos; 4743 u32 tx_flags = 0; 4744 struct ieee80211_prep_tx_info info = { 4745 .subtype = IEEE80211_STYPE_AUTH, 4746 .link_id = auth_data->link_id, 4747 }; 4748 4749 pos = mgmt->u.auth.variable; 4750 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4751 len - (pos - (u8 *)mgmt)); 4752 if (!challenge) 4753 return; 4754 auth_data->expected_transaction = 4; 4755 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4756 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4757 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4758 IEEE80211_TX_INTFL_MLME_CONN_TX; 4759 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4760 (void *)challenge, 4761 challenge->datalen + sizeof(*challenge), 4762 auth_data->ap_addr, auth_data->ap_addr, 4763 auth_data->key, auth_data->key_len, 4764 auth_data->key_idx, tx_flags); 4765 } 4766 4767 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4768 { 4769 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4770 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4771 struct sta_info *sta; 4772 4773 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4774 4775 sdata_info(sdata, "authenticated\n"); 4776 ifmgd->auth_data->done = true; 4777 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4778 ifmgd->auth_data->timeout_started = true; 4779 run_again(sdata, ifmgd->auth_data->timeout); 4780 4781 /* move station state to auth */ 4782 sta = sta_info_get(sdata, ap_addr); 4783 if (!sta) { 4784 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4785 return false; 4786 } 4787 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4788 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4789 return false; 4790 } 4791 4792 return true; 4793 } 4794 4795 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4796 struct ieee80211_mgmt *mgmt, size_t len) 4797 { 4798 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4799 u16 auth_alg, auth_transaction, status_code; 4800 struct ieee80211_event event = { 4801 .type = MLME_EVENT, 4802 .u.mlme.data = AUTH_EVENT, 4803 }; 4804 struct ieee80211_prep_tx_info info = { 4805 .subtype = IEEE80211_STYPE_AUTH, 4806 }; 4807 bool sae_need_confirm = false; 4808 4809 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4810 4811 if (len < 24 + 6) 4812 return; 4813 4814 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4815 return; 4816 4817 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4818 return; 4819 4820 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4821 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4822 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4823 4824 info.link_id = ifmgd->auth_data->link_id; 4825 4826 if (auth_alg != ifmgd->auth_data->algorithm || 4827 (auth_alg != WLAN_AUTH_SAE && 4828 auth_transaction != ifmgd->auth_data->expected_transaction) || 4829 (auth_alg == WLAN_AUTH_SAE && 4830 (auth_transaction < ifmgd->auth_data->expected_transaction || 4831 auth_transaction > 2))) { 4832 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4833 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4834 auth_transaction, 4835 ifmgd->auth_data->expected_transaction); 4836 goto notify_driver; 4837 } 4838 4839 if (status_code != WLAN_STATUS_SUCCESS) { 4840 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4841 4842 if (auth_alg == WLAN_AUTH_SAE && 4843 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4844 (auth_transaction == 1 && 4845 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4846 status_code == WLAN_STATUS_SAE_PK)))) { 4847 /* waiting for userspace now */ 4848 ifmgd->auth_data->waiting = true; 4849 ifmgd->auth_data->timeout = 4850 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4851 ifmgd->auth_data->timeout_started = true; 4852 run_again(sdata, ifmgd->auth_data->timeout); 4853 if (auth_transaction == 1) 4854 sae_need_confirm = true; 4855 goto notify_driver; 4856 } 4857 4858 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4859 mgmt->sa, status_code); 4860 ieee80211_destroy_auth_data(sdata, false); 4861 event.u.mlme.status = MLME_DENIED; 4862 event.u.mlme.reason = status_code; 4863 drv_event_callback(sdata->local, sdata, &event); 4864 goto notify_driver; 4865 } 4866 4867 switch (ifmgd->auth_data->algorithm) { 4868 case WLAN_AUTH_OPEN: 4869 case WLAN_AUTH_LEAP: 4870 case WLAN_AUTH_FT: 4871 case WLAN_AUTH_SAE: 4872 case WLAN_AUTH_FILS_SK: 4873 case WLAN_AUTH_FILS_SK_PFS: 4874 case WLAN_AUTH_FILS_PK: 4875 break; 4876 case WLAN_AUTH_SHARED_KEY: 4877 if (ifmgd->auth_data->expected_transaction != 4) { 4878 ieee80211_auth_challenge(sdata, mgmt, len); 4879 /* need another frame */ 4880 return; 4881 } 4882 break; 4883 default: 4884 WARN_ONCE(1, "invalid auth alg %d", 4885 ifmgd->auth_data->algorithm); 4886 goto notify_driver; 4887 } 4888 4889 event.u.mlme.status = MLME_SUCCESS; 4890 info.success = 1; 4891 drv_event_callback(sdata->local, sdata, &event); 4892 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4893 (auth_transaction == 2 && 4894 ifmgd->auth_data->expected_transaction == 2)) { 4895 if (!ieee80211_mark_sta_auth(sdata)) 4896 return; /* ignore frame -- wait for timeout */ 4897 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4898 auth_transaction == 1) { 4899 sae_need_confirm = true; 4900 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4901 auth_transaction == 2) { 4902 sdata_info(sdata, "SAE peer confirmed\n"); 4903 ifmgd->auth_data->peer_confirmed = true; 4904 } 4905 4906 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4907 notify_driver: 4908 if (!sae_need_confirm) 4909 drv_mgd_complete_tx(sdata->local, sdata, &info); 4910 } 4911 4912 #define case_WLAN(type) \ 4913 case WLAN_REASON_##type: return #type 4914 4915 const char *ieee80211_get_reason_code_string(u16 reason_code) 4916 { 4917 switch (reason_code) { 4918 case_WLAN(UNSPECIFIED); 4919 case_WLAN(PREV_AUTH_NOT_VALID); 4920 case_WLAN(DEAUTH_LEAVING); 4921 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4922 case_WLAN(DISASSOC_AP_BUSY); 4923 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4924 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4925 case_WLAN(DISASSOC_STA_HAS_LEFT); 4926 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4927 case_WLAN(DISASSOC_BAD_POWER); 4928 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4929 case_WLAN(INVALID_IE); 4930 case_WLAN(MIC_FAILURE); 4931 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4932 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4933 case_WLAN(IE_DIFFERENT); 4934 case_WLAN(INVALID_GROUP_CIPHER); 4935 case_WLAN(INVALID_PAIRWISE_CIPHER); 4936 case_WLAN(INVALID_AKMP); 4937 case_WLAN(UNSUPP_RSN_VERSION); 4938 case_WLAN(INVALID_RSN_IE_CAP); 4939 case_WLAN(IEEE8021X_FAILED); 4940 case_WLAN(CIPHER_SUITE_REJECTED); 4941 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4942 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4943 case_WLAN(DISASSOC_LOW_ACK); 4944 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4945 case_WLAN(QSTA_LEAVE_QBSS); 4946 case_WLAN(QSTA_NOT_USE); 4947 case_WLAN(QSTA_REQUIRE_SETUP); 4948 case_WLAN(QSTA_TIMEOUT); 4949 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4950 case_WLAN(MESH_PEER_CANCELED); 4951 case_WLAN(MESH_MAX_PEERS); 4952 case_WLAN(MESH_CONFIG); 4953 case_WLAN(MESH_CLOSE); 4954 case_WLAN(MESH_MAX_RETRIES); 4955 case_WLAN(MESH_CONFIRM_TIMEOUT); 4956 case_WLAN(MESH_INVALID_GTK); 4957 case_WLAN(MESH_INCONSISTENT_PARAM); 4958 case_WLAN(MESH_INVALID_SECURITY); 4959 case_WLAN(MESH_PATH_ERROR); 4960 case_WLAN(MESH_PATH_NOFORWARD); 4961 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4962 case_WLAN(MAC_EXISTS_IN_MBSS); 4963 case_WLAN(MESH_CHAN_REGULATORY); 4964 case_WLAN(MESH_CHAN); 4965 default: return "<unknown>"; 4966 } 4967 } 4968 4969 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4970 struct ieee80211_mgmt *mgmt, size_t len) 4971 { 4972 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4973 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4974 4975 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4976 4977 if (len < 24 + 2) 4978 return; 4979 4980 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4981 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4982 return; 4983 } 4984 4985 if (ifmgd->associated && 4986 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4987 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4988 sdata->vif.cfg.ap_addr, reason_code, 4989 ieee80211_get_reason_code_string(reason_code)); 4990 4991 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4992 4993 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4994 reason_code, false); 4995 return; 4996 } 4997 4998 if (ifmgd->assoc_data && 4999 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 5000 sdata_info(sdata, 5001 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 5002 ifmgd->assoc_data->ap_addr, reason_code, 5003 ieee80211_get_reason_code_string(reason_code)); 5004 5005 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5006 5007 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 5008 return; 5009 } 5010 } 5011 5012 5013 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 5014 struct ieee80211_mgmt *mgmt, size_t len) 5015 { 5016 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5017 u16 reason_code; 5018 5019 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5020 5021 if (len < 24 + 2) 5022 return; 5023 5024 if (!ifmgd->associated || 5025 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5026 return; 5027 5028 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5029 5030 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5031 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5032 return; 5033 } 5034 5035 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5036 sdata->vif.cfg.ap_addr, reason_code, 5037 ieee80211_get_reason_code_string(reason_code)); 5038 5039 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5040 5041 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5042 false); 5043 } 5044 5045 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5046 struct ieee80211_supported_band *sband, 5047 const struct link_sta_info *link_sta, 5048 const struct ieee802_11_elems *elems) 5049 { 5050 const struct ieee80211_sta_he_cap *own_he_cap = 5051 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5052 5053 if (elems->ext_capab_len < 10) 5054 return false; 5055 5056 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5057 return false; 5058 5059 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5060 IEEE80211_HE_MAC_CAP0_TWT_RES && 5061 own_he_cap && 5062 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5063 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5064 } 5065 5066 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5067 struct ieee80211_supported_band *sband, 5068 struct ieee80211_link_data *link, 5069 struct link_sta_info *link_sta, 5070 struct ieee802_11_elems *elems) 5071 { 5072 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5073 5074 if (link->conf->twt_requester != twt) { 5075 link->conf->twt_requester = twt; 5076 return BSS_CHANGED_TWT; 5077 } 5078 return 0; 5079 } 5080 5081 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5082 struct ieee80211_bss_conf *bss_conf, 5083 struct ieee80211_supported_band *sband, 5084 struct link_sta_info *link_sta) 5085 { 5086 const struct ieee80211_sta_he_cap *own_he_cap = 5087 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5088 5089 return bss_conf->he_support && 5090 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5091 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5092 own_he_cap && 5093 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5094 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5095 } 5096 5097 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5098 bool enabled) 5099 { 5100 /* in any case this is called, dialog token should be reset */ 5101 sdata->u.mgd.epcs.dialog_token = 0; 5102 5103 if (sdata->u.mgd.epcs.enabled == enabled) 5104 return; 5105 5106 sdata->u.mgd.epcs.enabled = enabled; 5107 cfg80211_epcs_changed(sdata->dev, enabled); 5108 } 5109 5110 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5111 { 5112 struct ieee80211_local *local = sdata->local; 5113 u8 link_id; 5114 5115 if (!sdata->u.mgd.epcs.enabled) 5116 return; 5117 5118 lockdep_assert_wiphy(local->hw.wiphy); 5119 5120 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5121 struct ieee802_11_elems *elems; 5122 struct ieee80211_link_data *link; 5123 const struct cfg80211_bss_ies *ies; 5124 bool ret; 5125 5126 rcu_read_lock(); 5127 5128 link = sdata_dereference(sdata->link[link_id], sdata); 5129 if (!link || !link->conf || !link->conf->bss) { 5130 rcu_read_unlock(); 5131 continue; 5132 } 5133 5134 if (link->u.mgd.disable_wmm_tracking) { 5135 rcu_read_unlock(); 5136 ieee80211_set_wmm_default(link, false, false); 5137 continue; 5138 } 5139 5140 ies = rcu_dereference(link->conf->bss->beacon_ies); 5141 if (!ies) { 5142 rcu_read_unlock(); 5143 ieee80211_set_wmm_default(link, false, false); 5144 continue; 5145 } 5146 5147 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5148 NULL); 5149 if (!elems) { 5150 rcu_read_unlock(); 5151 ieee80211_set_wmm_default(link, false, false); 5152 continue; 5153 } 5154 5155 ret = _ieee80211_sta_wmm_params(local, link, 5156 elems->wmm_param, 5157 elems->wmm_param_len, 5158 elems->mu_edca_param_set); 5159 5160 kfree(elems); 5161 rcu_read_unlock(); 5162 5163 if (!ret) { 5164 ieee80211_set_wmm_default(link, false, false); 5165 continue; 5166 } 5167 5168 ieee80211_mgd_set_link_qos_params(link); 5169 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5170 } 5171 } 5172 5173 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5174 struct link_sta_info *link_sta, 5175 struct cfg80211_bss *cbss, 5176 struct ieee80211_mgmt *mgmt, 5177 const u8 *elem_start, 5178 unsigned int elem_len, 5179 u64 *changed) 5180 { 5181 struct ieee80211_sub_if_data *sdata = link->sdata; 5182 struct ieee80211_mgd_assoc_data *assoc_data = 5183 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5184 struct ieee80211_bss_conf *bss_conf = link->conf; 5185 struct ieee80211_local *local = sdata->local; 5186 unsigned int link_id = link->link_id; 5187 struct ieee80211_elems_parse_params parse_params = { 5188 .mode = link->u.mgd.conn.mode, 5189 .start = elem_start, 5190 .len = elem_len, 5191 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5192 .from_ap = true, 5193 }; 5194 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5195 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5196 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5197 const struct cfg80211_bss_ies *bss_ies = NULL; 5198 struct ieee80211_supported_band *sband; 5199 struct ieee802_11_elems *elems; 5200 const __le16 prof_bss_param_ch_present = 5201 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5202 u16 capab_info; 5203 bool ret; 5204 5205 elems = ieee802_11_parse_elems_full(&parse_params); 5206 if (!elems) 5207 return false; 5208 5209 if (link_id == assoc_data->assoc_link_id) { 5210 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5211 5212 /* 5213 * we should not get to this flow unless the association was 5214 * successful, so set the status directly to success 5215 */ 5216 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5217 if (elems->ml_basic) { 5218 int bss_param_ch_cnt = 5219 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5220 5221 if (bss_param_ch_cnt < 0) { 5222 ret = false; 5223 goto out; 5224 } 5225 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5226 bss_conf->bss_param_ch_cnt_link_id = link_id; 5227 } 5228 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5229 !elems->prof || 5230 !(elems->prof->control & prof_bss_param_ch_present)) { 5231 ret = false; 5232 goto out; 5233 } else { 5234 const u8 *ptr = elems->prof->variable + 5235 elems->prof->sta_info_len - 1; 5236 int bss_param_ch_cnt; 5237 5238 /* 5239 * During parsing, we validated that these fields exist, 5240 * otherwise elems->prof would have been set to NULL. 5241 */ 5242 capab_info = get_unaligned_le16(ptr); 5243 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5244 bss_param_ch_cnt = 5245 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5246 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5247 bss_conf->bss_param_ch_cnt_link_id = link_id; 5248 5249 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5250 link_info(link, "association response status code=%u\n", 5251 assoc_data->link[link_id].status); 5252 ret = true; 5253 goto out; 5254 } 5255 } 5256 5257 if (!is_s1g && !elems->supp_rates) { 5258 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5259 ret = false; 5260 goto out; 5261 } 5262 5263 link->u.mgd.tdls_chan_switch_prohibited = 5264 elems->ext_capab && elems->ext_capab_len >= 5 && 5265 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5266 5267 /* 5268 * Some APs are erroneously not including some information in their 5269 * (re)association response frames. Try to recover by using the data 5270 * from the beacon or probe response. This seems to afflict mobile 5271 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5272 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5273 */ 5274 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5275 ((assoc_data->wmm && !elems->wmm_param) || 5276 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5277 (!elems->ht_cap_elem || !elems->ht_operation)) || 5278 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5279 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5280 const struct cfg80211_bss_ies *ies; 5281 struct ieee802_11_elems *bss_elems; 5282 5283 rcu_read_lock(); 5284 ies = rcu_dereference(cbss->ies); 5285 if (ies) 5286 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5287 GFP_ATOMIC); 5288 rcu_read_unlock(); 5289 if (!bss_ies) { 5290 ret = false; 5291 goto out; 5292 } 5293 5294 parse_params.start = bss_ies->data; 5295 parse_params.len = bss_ies->len; 5296 parse_params.bss = cbss; 5297 parse_params.link_id = -1; 5298 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5299 if (!bss_elems) { 5300 ret = false; 5301 goto out; 5302 } 5303 5304 if (assoc_data->wmm && 5305 !elems->wmm_param && bss_elems->wmm_param) { 5306 elems->wmm_param = bss_elems->wmm_param; 5307 sdata_info(sdata, 5308 "AP bug: WMM param missing from AssocResp\n"); 5309 } 5310 5311 /* 5312 * Also check if we requested HT/VHT, otherwise the AP doesn't 5313 * have to include the IEs in the (re)association response. 5314 */ 5315 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5316 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5317 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5318 sdata_info(sdata, 5319 "AP bug: HT capability missing from AssocResp\n"); 5320 } 5321 if (!elems->ht_operation && bss_elems->ht_operation && 5322 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5323 elems->ht_operation = bss_elems->ht_operation; 5324 sdata_info(sdata, 5325 "AP bug: HT operation missing from AssocResp\n"); 5326 } 5327 5328 if (is_5ghz) { 5329 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5330 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5331 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5332 sdata_info(sdata, 5333 "AP bug: VHT capa missing from AssocResp\n"); 5334 } 5335 5336 if (!elems->vht_operation && bss_elems->vht_operation && 5337 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5338 elems->vht_operation = bss_elems->vht_operation; 5339 sdata_info(sdata, 5340 "AP bug: VHT operation missing from AssocResp\n"); 5341 } 5342 } 5343 kfree(bss_elems); 5344 } 5345 5346 /* 5347 * We previously checked these in the beacon/probe response, so 5348 * they should be present here. This is just a safety net. 5349 * Note that the ieee80211_config_bw() below would also check 5350 * for this (and more), but this has better error reporting. 5351 */ 5352 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5353 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5354 sdata_info(sdata, 5355 "HT AP is missing WMM params or HT capability/operation\n"); 5356 ret = false; 5357 goto out; 5358 } 5359 5360 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5361 (!elems->vht_cap_elem || !elems->vht_operation)) { 5362 sdata_info(sdata, 5363 "VHT AP is missing VHT capability/operation\n"); 5364 ret = false; 5365 goto out; 5366 } 5367 5368 /* check/update if AP changed anything in assoc response vs. scan */ 5369 if (ieee80211_config_bw(link, elems, 5370 link_id == assoc_data->assoc_link_id, 5371 changed, 5372 le16_to_cpu(mgmt->frame_control) & 5373 IEEE80211_FCTL_STYPE)) { 5374 ret = false; 5375 goto out; 5376 } 5377 5378 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5379 ret = false; 5380 goto out; 5381 } 5382 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5383 5384 /* Set up internal HT/VHT capabilities */ 5385 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5386 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5387 elems->ht_cap_elem, 5388 link_sta); 5389 5390 if (elems->vht_cap_elem && 5391 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5392 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5393 const struct cfg80211_bss_ies *ies; 5394 5395 /* 5396 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5397 * too large maximum MPDU length in the association response 5398 * (indicating 12k) that it cannot actually process ... 5399 * Work around that. 5400 */ 5401 rcu_read_lock(); 5402 ies = rcu_dereference(cbss->ies); 5403 if (ies) { 5404 const struct element *elem; 5405 5406 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5407 ies->data, ies->len); 5408 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5409 bss_vht_cap = (const void *)elem->data; 5410 } 5411 5412 if (ieee80211_hw_check(&local->hw, STRICT) && 5413 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5414 sizeof(*bss_vht_cap)))) { 5415 rcu_read_unlock(); 5416 ret = false; 5417 link_info(link, "VHT capabilities mismatch\n"); 5418 goto out; 5419 } 5420 5421 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5422 elems->vht_cap_elem, 5423 bss_vht_cap, link_sta); 5424 rcu_read_unlock(); 5425 } 5426 5427 if (elems->he_operation && 5428 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5429 elems->he_cap) { 5430 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5431 elems->he_cap, 5432 elems->he_cap_len, 5433 elems->he_6ghz_capa, 5434 link_sta); 5435 5436 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5437 if (elems->rsnx && elems->rsnx_len && 5438 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5439 wiphy_ext_feature_isset(local->hw.wiphy, 5440 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5441 bss_conf->twt_protected = true; 5442 else 5443 bss_conf->twt_protected = false; 5444 5445 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5446 link_sta, elems); 5447 5448 if (elems->eht_operation && elems->eht_cap && 5449 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5450 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5451 elems->he_cap, 5452 elems->he_cap_len, 5453 elems->eht_cap, 5454 elems->eht_cap_len, 5455 link_sta); 5456 5457 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5458 bss_conf->epcs_support = bss_conf->eht_support && 5459 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5460 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5461 5462 /* EPCS might be already enabled but a new added link 5463 * does not support EPCS. This should not really happen 5464 * in practice. 5465 */ 5466 if (sdata->u.mgd.epcs.enabled && 5467 !bss_conf->epcs_support) 5468 ieee80211_epcs_teardown(sdata); 5469 } else { 5470 bss_conf->eht_support = false; 5471 bss_conf->epcs_support = false; 5472 } 5473 } else { 5474 bss_conf->he_support = false; 5475 bss_conf->twt_requester = false; 5476 bss_conf->twt_protected = false; 5477 bss_conf->eht_support = false; 5478 bss_conf->epcs_support = false; 5479 } 5480 5481 if (elems->s1g_oper && 5482 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5483 elems->s1g_capab) 5484 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5485 link_sta); 5486 5487 bss_conf->twt_broadcast = 5488 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5489 5490 if (bss_conf->he_support) { 5491 bss_conf->he_bss_color.color = 5492 le32_get_bits(elems->he_operation->he_oper_params, 5493 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5494 bss_conf->he_bss_color.partial = 5495 le32_get_bits(elems->he_operation->he_oper_params, 5496 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5497 bss_conf->he_bss_color.enabled = 5498 !le32_get_bits(elems->he_operation->he_oper_params, 5499 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5500 5501 if (bss_conf->he_bss_color.enabled) 5502 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5503 5504 bss_conf->htc_trig_based_pkt_ext = 5505 le32_get_bits(elems->he_operation->he_oper_params, 5506 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5507 bss_conf->frame_time_rts_th = 5508 le32_get_bits(elems->he_operation->he_oper_params, 5509 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5510 5511 bss_conf->uora_exists = !!elems->uora_element; 5512 if (elems->uora_element) 5513 bss_conf->uora_ocw_range = elems->uora_element[0]; 5514 5515 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5516 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5517 /* TODO: OPEN: what happens if BSS color disable is set? */ 5518 } 5519 5520 if (cbss->transmitted_bss) { 5521 bss_conf->nontransmitted = true; 5522 ether_addr_copy(bss_conf->transmitter_bssid, 5523 cbss->transmitted_bss->bssid); 5524 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5525 bss_conf->bssid_index = cbss->bssid_index; 5526 } 5527 5528 /* 5529 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5530 * in their association response, so ignore that data for our own 5531 * configuration. If it changed since the last beacon, we'll get the 5532 * next beacon and update then. 5533 */ 5534 5535 /* 5536 * If an operating mode notification IE is present, override the 5537 * NSS calculation (that would be done in rate_control_rate_init()) 5538 * and use the # of streams from that element. 5539 */ 5540 if (elems->opmode_notif && 5541 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5542 u8 nss; 5543 5544 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5545 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5546 nss += 1; 5547 link_sta->pub->rx_nss = nss; 5548 } 5549 5550 /* 5551 * Always handle WMM once after association regardless 5552 * of the first value the AP uses. Setting -1 here has 5553 * that effect because the AP values is an unsigned 5554 * 4-bit value. 5555 */ 5556 link->u.mgd.wmm_last_param_set = -1; 5557 link->u.mgd.mu_edca_last_param_set = -1; 5558 5559 if (link->u.mgd.disable_wmm_tracking) { 5560 ieee80211_set_wmm_default(link, false, false); 5561 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5562 elems->wmm_param_len, 5563 elems->mu_edca_param_set)) { 5564 /* still enable QoS since we might have HT/VHT */ 5565 ieee80211_set_wmm_default(link, false, true); 5566 /* disable WMM tracking in this case to disable 5567 * tracking WMM parameter changes in the beacon if 5568 * the parameters weren't actually valid. Doing so 5569 * avoids changing parameters very strangely when 5570 * the AP is going back and forth between valid and 5571 * invalid parameters. 5572 */ 5573 link->u.mgd.disable_wmm_tracking = true; 5574 } 5575 5576 if (elems->max_idle_period_ie) { 5577 bss_conf->max_idle_period = 5578 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5579 bss_conf->protected_keep_alive = 5580 !!(elems->max_idle_period_ie->idle_options & 5581 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5582 *changed |= BSS_CHANGED_KEEP_ALIVE; 5583 } else { 5584 bss_conf->max_idle_period = 0; 5585 bss_conf->protected_keep_alive = false; 5586 } 5587 5588 /* set assoc capability (AID was already set earlier), 5589 * ieee80211_set_associated() will tell the driver */ 5590 bss_conf->assoc_capability = capab_info; 5591 5592 ret = true; 5593 out: 5594 kfree(elems); 5595 kfree(bss_ies); 5596 return ret; 5597 } 5598 5599 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5600 struct sta_info *sta, 5601 struct link_sta_info *link_sta, 5602 struct cfg80211_bss *cbss) 5603 { 5604 struct ieee80211_sub_if_data *sdata = link->sdata; 5605 struct ieee80211_local *local = sdata->local; 5606 struct ieee80211_bss *bss = (void *)cbss->priv; 5607 u32 rates = 0, basic_rates = 0; 5608 bool have_higher_than_11mbit = false; 5609 int min_rate = INT_MAX, min_rate_index = -1; 5610 struct ieee80211_supported_band *sband; 5611 5612 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5613 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5614 5615 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5616 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5617 ieee80211_s1g_sta_rate_init(sta); 5618 return 0; 5619 } 5620 5621 sband = local->hw.wiphy->bands[cbss->channel->band]; 5622 5623 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5624 NULL, 0, 5625 &rates, &basic_rates, NULL, 5626 &have_higher_than_11mbit, 5627 &min_rate, &min_rate_index); 5628 5629 /* 5630 * This used to be a workaround for basic rates missing 5631 * in the association response frame. Now that we no 5632 * longer use the basic rates from there, it probably 5633 * doesn't happen any more, but keep the workaround so 5634 * in case some *other* APs are buggy in different ways 5635 * we can connect -- with a warning. 5636 * Allow this workaround only in case the AP provided at least 5637 * one rate. 5638 */ 5639 if (min_rate_index < 0) { 5640 link_info(link, "No legacy rates in association response\n"); 5641 return -EINVAL; 5642 } else if (!basic_rates) { 5643 link_info(link, "No basic rates, using min rate instead\n"); 5644 basic_rates = BIT(min_rate_index); 5645 } 5646 5647 if (rates) 5648 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5649 else 5650 link_info(link, "No rates found, keeping mandatory only\n"); 5651 5652 link->conf->basic_rates = basic_rates; 5653 5654 /* cf. IEEE 802.11 9.2.12 */ 5655 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5656 have_higher_than_11mbit; 5657 5658 return 0; 5659 } 5660 5661 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5662 struct cfg80211_bss *cbss) 5663 { 5664 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5665 const struct element *ht_cap_elem, *vht_cap_elem; 5666 const struct cfg80211_bss_ies *ies; 5667 const struct ieee80211_ht_cap *ht_cap; 5668 const struct ieee80211_vht_cap *vht_cap; 5669 const struct ieee80211_he_cap_elem *he_cap; 5670 const struct element *he_cap_elem; 5671 u16 mcs_80_map, mcs_160_map; 5672 int i, mcs_nss_size; 5673 bool support_160; 5674 u8 chains = 1; 5675 5676 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5677 return chains; 5678 5679 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5680 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5681 ht_cap = (void *)ht_cap_elem->data; 5682 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5683 /* 5684 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5685 * "Tx Unequal Modulation Supported" fields. 5686 */ 5687 } 5688 5689 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5690 return chains; 5691 5692 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5693 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5694 u8 nss; 5695 u16 tx_mcs_map; 5696 5697 vht_cap = (void *)vht_cap_elem->data; 5698 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5699 for (nss = 8; nss > 0; nss--) { 5700 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5701 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5702 break; 5703 } 5704 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5705 chains = max(chains, nss); 5706 } 5707 5708 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5709 return chains; 5710 5711 ies = rcu_dereference(cbss->ies); 5712 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5713 ies->data, ies->len); 5714 5715 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5716 return chains; 5717 5718 /* skip one byte ext_tag_id */ 5719 he_cap = (void *)(he_cap_elem->data + 1); 5720 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5721 5722 /* invalid HE IE */ 5723 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5724 return chains; 5725 5726 /* mcs_nss is right after he_cap info */ 5727 he_mcs_nss_supp = (void *)(he_cap + 1); 5728 5729 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5730 5731 for (i = 7; i >= 0; i--) { 5732 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5733 5734 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5735 chains = max_t(u8, chains, i + 1); 5736 break; 5737 } 5738 } 5739 5740 support_160 = he_cap->phy_cap_info[0] & 5741 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5742 5743 if (!support_160) 5744 return chains; 5745 5746 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5747 for (i = 7; i >= 0; i--) { 5748 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5749 5750 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5751 chains = max_t(u8, chains, i + 1); 5752 break; 5753 } 5754 } 5755 5756 return chains; 5757 } 5758 5759 static void 5760 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5761 struct ieee80211_supported_band *sband, 5762 struct cfg80211_assoc_request *req, 5763 bool wmm_used, int link_id, 5764 struct ieee80211_conn_settings *conn) 5765 { 5766 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5767 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5768 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5769 const struct ieee80211_sta_he_cap *he_cap; 5770 const struct ieee80211_sta_eht_cap *eht_cap; 5771 struct ieee80211_sta_vht_cap vht_cap; 5772 5773 if (sband->band == NL80211_BAND_S1GHZ) { 5774 conn->mode = IEEE80211_CONN_MODE_S1G; 5775 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5776 mlme_dbg(sdata, "operating as S1G STA\n"); 5777 return; 5778 } 5779 5780 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5781 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5782 5783 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5784 5785 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5786 mlme_link_id_dbg(sdata, link_id, 5787 "HT disabled by flag, limiting to legacy\n"); 5788 goto out; 5789 } 5790 5791 if (!wmm_used) { 5792 mlme_link_id_dbg(sdata, link_id, 5793 "WMM/QoS not supported, limiting to legacy\n"); 5794 goto out; 5795 } 5796 5797 if (req) { 5798 unsigned int i; 5799 5800 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5801 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5802 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5803 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5804 netdev_info(sdata->dev, 5805 "WEP/TKIP use, limiting to legacy\n"); 5806 goto out; 5807 } 5808 } 5809 } 5810 5811 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5812 mlme_link_id_dbg(sdata, link_id, 5813 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5814 goto out; 5815 } 5816 5817 /* HT is fine */ 5818 conn->mode = IEEE80211_CONN_MODE_HT; 5819 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5820 IEEE80211_CONN_BW_LIMIT_40 : 5821 IEEE80211_CONN_BW_LIMIT_20; 5822 5823 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5824 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5825 5826 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5827 mlme_link_id_dbg(sdata, link_id, 5828 "VHT disabled by flag, limiting to HT\n"); 5829 goto out; 5830 } 5831 5832 if (vht_cap.vht_supported && is_5ghz) { 5833 bool have_80mhz = false; 5834 unsigned int i; 5835 5836 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5837 mlme_link_id_dbg(sdata, link_id, 5838 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5839 goto out; 5840 } 5841 5842 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5843 for (i = 0; i < sband->n_channels; i++) { 5844 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5845 IEEE80211_CHAN_NO_80MHZ)) 5846 continue; 5847 5848 have_80mhz = true; 5849 break; 5850 } 5851 5852 if (!have_80mhz) { 5853 mlme_link_id_dbg(sdata, link_id, 5854 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5855 goto out; 5856 } 5857 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5858 mlme_link_id_dbg(sdata, link_id, 5859 "no VHT support on 5 GHz, limiting to HT\n"); 5860 goto out; 5861 } 5862 5863 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5864 if (sband->band != NL80211_BAND_2GHZ) { 5865 conn->mode = IEEE80211_CONN_MODE_VHT; 5866 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5867 } 5868 5869 if (is_5ghz && 5870 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5871 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5872 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5873 mlme_link_id_dbg(sdata, link_id, 5874 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5875 } 5876 5877 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5878 mlme_link_id_dbg(sdata, link_id, 5879 "HE disabled by flag, limiting to HT/VHT\n"); 5880 goto out; 5881 } 5882 5883 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5884 if (!he_cap) { 5885 WARN_ON(is_6ghz); 5886 mlme_link_id_dbg(sdata, link_id, 5887 "no HE support, limiting to HT/VHT\n"); 5888 goto out; 5889 } 5890 5891 /* so we have HE */ 5892 conn->mode = IEEE80211_CONN_MODE_HE; 5893 5894 /* check bandwidth */ 5895 switch (sband->band) { 5896 default: 5897 case NL80211_BAND_2GHZ: 5898 if (he_cap->he_cap_elem.phy_cap_info[0] & 5899 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5900 break; 5901 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5902 mlme_link_id_dbg(sdata, link_id, 5903 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5904 break; 5905 case NL80211_BAND_5GHZ: 5906 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5907 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5908 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5909 mlme_link_id_dbg(sdata, link_id, 5910 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5911 break; 5912 } 5913 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5914 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5915 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5916 conn->bw_limit, 5917 IEEE80211_CONN_BW_LIMIT_80); 5918 mlme_link_id_dbg(sdata, link_id, 5919 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5920 } 5921 break; 5922 case NL80211_BAND_6GHZ: 5923 if (he_cap->he_cap_elem.phy_cap_info[0] & 5924 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5925 break; 5926 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5927 conn->bw_limit, 5928 IEEE80211_CONN_BW_LIMIT_80); 5929 mlme_link_id_dbg(sdata, link_id, 5930 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5931 break; 5932 } 5933 5934 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5935 mlme_link_id_dbg(sdata, link_id, 5936 "EHT disabled by flag, limiting to HE\n"); 5937 goto out; 5938 } 5939 5940 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5941 if (!eht_cap) { 5942 mlme_link_id_dbg(sdata, link_id, 5943 "no EHT support, limiting to HE\n"); 5944 goto out; 5945 } 5946 5947 /* we have EHT */ 5948 5949 conn->mode = IEEE80211_CONN_MODE_EHT; 5950 5951 /* check bandwidth */ 5952 if (is_6ghz && 5953 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5954 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5955 else if (is_6ghz) 5956 mlme_link_id_dbg(sdata, link_id, 5957 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5958 5959 out: 5960 mlme_link_id_dbg(sdata, link_id, 5961 "determined local STA to be %s, BW limited to %d MHz\n", 5962 ieee80211_conn_mode_str(conn->mode), 5963 20 * (1 << conn->bw_limit)); 5964 } 5965 5966 static void 5967 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5968 struct ieee80211_supported_band *sband, 5969 struct cfg80211_auth_request *req, 5970 bool wmm_used, 5971 struct ieee80211_conn_settings *conn) 5972 { 5973 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5974 req->link_id > 0 ? req->link_id : 0, 5975 conn); 5976 } 5977 5978 static void 5979 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5980 struct ieee80211_supported_band *sband, 5981 struct cfg80211_assoc_request *req, 5982 bool wmm_used, int link_id, 5983 struct ieee80211_conn_settings *conn) 5984 { 5985 struct ieee80211_conn_settings tmp; 5986 5987 WARN_ON(!req); 5988 5989 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5990 &tmp); 5991 5992 conn->mode = min_t(enum ieee80211_conn_mode, 5993 conn->mode, tmp.mode); 5994 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5995 conn->bw_limit, tmp.bw_limit); 5996 } 5997 5998 static enum ieee80211_ap_reg_power 5999 ieee80211_ap_power_type(u8 control) 6000 { 6001 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 6002 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 6003 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 6004 return IEEE80211_REG_LPI_AP; 6005 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 6006 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 6007 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD: 6008 return IEEE80211_REG_SP_AP; 6009 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 6010 return IEEE80211_REG_VLP_AP; 6011 default: 6012 return IEEE80211_REG_UNSET_AP; 6013 } 6014 } 6015 6016 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 6017 struct ieee80211_link_data *link, 6018 int link_id, 6019 struct cfg80211_bss *cbss, bool mlo, 6020 struct ieee80211_conn_settings *conn, 6021 unsigned long *userspace_selectors) 6022 { 6023 struct ieee80211_local *local = sdata->local; 6024 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 6025 struct ieee80211_chan_req chanreq = {}; 6026 struct cfg80211_chan_def ap_chandef; 6027 struct ieee802_11_elems *elems; 6028 int ret; 6029 6030 lockdep_assert_wiphy(local->hw.wiphy); 6031 6032 rcu_read_lock(); 6033 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6034 &chanreq, &ap_chandef, 6035 userspace_selectors); 6036 6037 if (IS_ERR(elems)) { 6038 rcu_read_unlock(); 6039 return PTR_ERR(elems); 6040 } 6041 6042 if (mlo && !elems->ml_basic) { 6043 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6044 rcu_read_unlock(); 6045 kfree(elems); 6046 return -EINVAL; 6047 } 6048 6049 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6050 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6051 6052 if (elems->pwr_constr_elem) 6053 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6054 6055 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6056 if (he_6ghz_oper) 6057 link->conf->power_type = 6058 ieee80211_ap_power_type(he_6ghz_oper->control); 6059 else 6060 link_info(link, 6061 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6062 cbss->channel->center_freq); 6063 6064 link->conf->tpe = elems->tpe; 6065 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6066 &chanreq.oper); 6067 } 6068 rcu_read_unlock(); 6069 /* the element data was RCU protected so no longer valid anyway */ 6070 kfree(elems); 6071 elems = NULL; 6072 6073 if (!link) 6074 return 0; 6075 6076 rcu_read_lock(); 6077 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6078 local->rx_chains); 6079 rcu_read_unlock(); 6080 6081 /* 6082 * If this fails (possibly due to channel context sharing 6083 * on incompatible channels, e.g. 80+80 and 160 sharing the 6084 * same control channel) try to use a smaller bandwidth. 6085 */ 6086 ret = ieee80211_link_use_channel(link, &chanreq, 6087 IEEE80211_CHANCTX_SHARED); 6088 6089 /* don't downgrade for 5 and 10 MHz channels, though. */ 6090 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6091 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6092 return ret; 6093 6094 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6095 ieee80211_chanreq_downgrade(&chanreq, conn); 6096 6097 ret = ieee80211_link_use_channel(link, &chanreq, 6098 IEEE80211_CHANCTX_SHARED); 6099 } 6100 6101 return ret; 6102 } 6103 6104 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6105 u8 *dtim_count, u8 *dtim_period) 6106 { 6107 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6108 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6109 ies->len); 6110 const struct ieee80211_tim_ie *tim = NULL; 6111 const struct ieee80211_bssid_index *idx; 6112 bool valid = tim_ie && tim_ie[1] >= 2; 6113 6114 if (valid) 6115 tim = (void *)(tim_ie + 2); 6116 6117 if (dtim_count) 6118 *dtim_count = valid ? tim->dtim_count : 0; 6119 6120 if (dtim_period) 6121 *dtim_period = valid ? tim->dtim_period : 0; 6122 6123 /* Check if value is overridden by non-transmitted profile */ 6124 if (!idx_ie || idx_ie[1] < 3) 6125 return valid; 6126 6127 idx = (void *)(idx_ie + 2); 6128 6129 if (dtim_count) 6130 *dtim_count = idx->dtim_count; 6131 6132 if (dtim_period) 6133 *dtim_period = idx->dtim_period; 6134 6135 return true; 6136 } 6137 6138 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6139 struct ieee80211_mgmt *mgmt, 6140 struct ieee802_11_elems *elems, 6141 const u8 *elem_start, unsigned int elem_len) 6142 { 6143 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6144 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6145 struct ieee80211_local *local = sdata->local; 6146 unsigned int link_id; 6147 struct sta_info *sta; 6148 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6149 u16 valid_links = 0, dormant_links = 0; 6150 int err; 6151 6152 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6153 /* 6154 * station info was already allocated and inserted before 6155 * the association and should be available to us 6156 */ 6157 sta = sta_info_get(sdata, assoc_data->ap_addr); 6158 if (WARN_ON(!sta)) 6159 goto out_err; 6160 6161 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6162 6163 if (ieee80211_vif_is_mld(&sdata->vif)) { 6164 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6165 if (!assoc_data->link[link_id].bss) 6166 continue; 6167 6168 valid_links |= BIT(link_id); 6169 if (assoc_data->link[link_id].disabled) 6170 dormant_links |= BIT(link_id); 6171 6172 if (link_id != assoc_data->assoc_link_id) { 6173 err = ieee80211_sta_allocate_link(sta, link_id); 6174 if (err) 6175 goto out_err; 6176 } 6177 } 6178 6179 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6180 } 6181 6182 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6183 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6184 struct ieee80211_link_data *link; 6185 struct link_sta_info *link_sta; 6186 6187 if (!cbss) 6188 continue; 6189 6190 link = sdata_dereference(sdata->link[link_id], sdata); 6191 if (WARN_ON(!link)) 6192 goto out_err; 6193 6194 if (ieee80211_vif_is_mld(&sdata->vif)) 6195 link_info(link, 6196 "local address %pM, AP link address %pM%s\n", 6197 link->conf->addr, 6198 assoc_data->link[link_id].bss->bssid, 6199 link_id == assoc_data->assoc_link_id ? 6200 " (assoc)" : ""); 6201 6202 link_sta = rcu_dereference_protected(sta->link[link_id], 6203 lockdep_is_held(&local->hw.wiphy->mtx)); 6204 if (WARN_ON(!link_sta)) 6205 goto out_err; 6206 6207 if (!link->u.mgd.have_beacon) { 6208 const struct cfg80211_bss_ies *ies; 6209 6210 rcu_read_lock(); 6211 ies = rcu_dereference(cbss->beacon_ies); 6212 if (ies) 6213 link->u.mgd.have_beacon = true; 6214 else 6215 ies = rcu_dereference(cbss->ies); 6216 ieee80211_get_dtim(ies, 6217 &link->conf->sync_dtim_count, 6218 &link->u.mgd.dtim_period); 6219 link->conf->beacon_int = cbss->beacon_interval; 6220 rcu_read_unlock(); 6221 } 6222 6223 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6224 6225 if (link_id != assoc_data->assoc_link_id) { 6226 link->u.mgd.conn = assoc_data->link[link_id].conn; 6227 6228 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6229 true, &link->u.mgd.conn, 6230 sdata->u.mgd.userspace_selectors); 6231 if (err) { 6232 link_info(link, "prep_channel failed\n"); 6233 goto out_err; 6234 } 6235 } 6236 6237 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6238 assoc_data->link[link_id].bss); 6239 if (err) 6240 goto out_err; 6241 6242 if (!ieee80211_assoc_config_link(link, link_sta, 6243 assoc_data->link[link_id].bss, 6244 mgmt, elem_start, elem_len, 6245 &changed[link_id])) 6246 goto out_err; 6247 6248 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6249 valid_links &= ~BIT(link_id); 6250 ieee80211_sta_remove_link(sta, link_id); 6251 continue; 6252 } 6253 6254 if (link_id != assoc_data->assoc_link_id) { 6255 err = ieee80211_sta_activate_link(sta, link_id); 6256 if (err) 6257 goto out_err; 6258 } 6259 } 6260 6261 /* links might have changed due to rejected ones, set them again */ 6262 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6263 6264 rate_control_rate_init_all_links(sta); 6265 6266 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6267 set_sta_flag(sta, WLAN_STA_MFP); 6268 sta->sta.mfp = true; 6269 } else { 6270 sta->sta.mfp = false; 6271 } 6272 6273 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6274 elems->ext_capab_len); 6275 6276 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6277 local->hw.queues >= IEEE80211_NUM_ACS; 6278 6279 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6280 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6281 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6282 if (err) { 6283 sdata_info(sdata, 6284 "failed to move station %pM to desired state\n", 6285 sta->sta.addr); 6286 WARN_ON(__sta_info_destroy(sta)); 6287 goto out_err; 6288 } 6289 6290 if (sdata->wdev.use_4addr) 6291 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6292 6293 ieee80211_set_associated(sdata, assoc_data, changed); 6294 6295 /* 6296 * If we're using 4-addr mode, let the AP know that we're 6297 * doing so, so that it can create the STA VLAN on its side 6298 */ 6299 if (ifmgd->use_4addr) 6300 ieee80211_send_4addr_nullfunc(local, sdata); 6301 6302 /* 6303 * Start timer to probe the connection to the AP now. 6304 * Also start the timer that will detect beacon loss. 6305 */ 6306 ieee80211_sta_reset_beacon_monitor(sdata); 6307 ieee80211_sta_reset_conn_monitor(sdata); 6308 6309 return true; 6310 out_err: 6311 eth_zero_addr(sdata->vif.cfg.ap_addr); 6312 return false; 6313 } 6314 6315 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6316 struct ieee80211_mgmt *mgmt, 6317 size_t len) 6318 { 6319 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6320 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6321 u16 capab_info, status_code, aid; 6322 struct ieee80211_elems_parse_params parse_params = { 6323 .bss = NULL, 6324 .link_id = -1, 6325 .from_ap = true, 6326 }; 6327 struct ieee802_11_elems *elems; 6328 int ac; 6329 const u8 *elem_start; 6330 unsigned int elem_len; 6331 bool reassoc; 6332 struct ieee80211_event event = { 6333 .type = MLME_EVENT, 6334 .u.mlme.data = ASSOC_EVENT, 6335 }; 6336 struct ieee80211_prep_tx_info info = {}; 6337 struct cfg80211_rx_assoc_resp_data resp = { 6338 .uapsd_queues = -1, 6339 }; 6340 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6341 unsigned int link_id; 6342 6343 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6344 6345 if (!assoc_data) 6346 return; 6347 6348 info.link_id = assoc_data->assoc_link_id; 6349 6350 parse_params.mode = 6351 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6352 6353 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6354 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6355 return; 6356 6357 /* 6358 * AssocResp and ReassocResp have identical structure, so process both 6359 * of them in this function. 6360 */ 6361 6362 if (len < 24 + 6) 6363 return; 6364 6365 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6366 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6367 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6368 if (assoc_data->s1g) 6369 elem_start = mgmt->u.s1g_assoc_resp.variable; 6370 else 6371 elem_start = mgmt->u.assoc_resp.variable; 6372 6373 /* 6374 * Note: this may not be perfect, AP might misbehave - if 6375 * anyone needs to rely on perfect complete notification 6376 * with the exact right subtype, then we need to track what 6377 * we actually transmitted. 6378 */ 6379 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6380 IEEE80211_STYPE_ASSOC_REQ; 6381 6382 if (assoc_data->fils_kek_len && 6383 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6384 return; 6385 6386 elem_len = len - (elem_start - (u8 *)mgmt); 6387 parse_params.start = elem_start; 6388 parse_params.len = elem_len; 6389 elems = ieee802_11_parse_elems_full(&parse_params); 6390 if (!elems) 6391 goto notify_driver; 6392 6393 if (elems->aid_resp) 6394 aid = le16_to_cpu(elems->aid_resp->aid); 6395 else if (assoc_data->s1g) 6396 aid = 0; /* TODO */ 6397 else 6398 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6399 6400 /* 6401 * The 5 MSB of the AID field are reserved 6402 * (802.11-2016 9.4.1.8 AID field) 6403 */ 6404 aid &= 0x7ff; 6405 6406 sdata_info(sdata, 6407 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6408 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6409 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6410 6411 ifmgd->broken_ap = false; 6412 6413 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6414 elems->timeout_int && 6415 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6416 u32 tu, ms; 6417 6418 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6419 le32_to_cpu(elems->timeout_int->value)); 6420 6421 tu = le32_to_cpu(elems->timeout_int->value); 6422 ms = tu * 1024 / 1000; 6423 sdata_info(sdata, 6424 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6425 assoc_data->ap_addr, tu, ms); 6426 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6427 assoc_data->timeout_started = true; 6428 assoc_data->comeback = true; 6429 if (ms > IEEE80211_ASSOC_TIMEOUT) 6430 run_again(sdata, assoc_data->timeout); 6431 goto notify_driver; 6432 } 6433 6434 if (status_code != WLAN_STATUS_SUCCESS) { 6435 sdata_info(sdata, "%pM denied association (code=%d)\n", 6436 assoc_data->ap_addr, status_code); 6437 event.u.mlme.status = MLME_DENIED; 6438 event.u.mlme.reason = status_code; 6439 drv_event_callback(sdata->local, sdata, &event); 6440 } else { 6441 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6442 sdata_info(sdata, 6443 "invalid AID value %d (out of range), turn off PS\n", 6444 aid); 6445 aid = 0; 6446 ifmgd->broken_ap = true; 6447 } 6448 6449 if (ieee80211_vif_is_mld(&sdata->vif)) { 6450 struct ieee80211_mle_basic_common_info *common; 6451 6452 if (!elems->ml_basic) { 6453 sdata_info(sdata, 6454 "MLO association with %pM but no (basic) multi-link element in response!\n", 6455 assoc_data->ap_addr); 6456 goto abandon_assoc; 6457 } 6458 6459 common = (void *)elems->ml_basic->variable; 6460 6461 if (memcmp(assoc_data->ap_addr, 6462 common->mld_mac_addr, ETH_ALEN)) { 6463 sdata_info(sdata, 6464 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6465 common->mld_mac_addr, 6466 assoc_data->ap_addr); 6467 goto abandon_assoc; 6468 } 6469 6470 sdata->vif.cfg.eml_cap = 6471 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6472 sdata->vif.cfg.eml_med_sync_delay = 6473 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6474 sdata->vif.cfg.mld_capa_op = 6475 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6476 } 6477 6478 sdata->vif.cfg.aid = aid; 6479 6480 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6481 elem_start, elem_len)) { 6482 /* oops -- internal error -- send timeout for now */ 6483 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6484 goto notify_driver; 6485 } 6486 event.u.mlme.status = MLME_SUCCESS; 6487 drv_event_callback(sdata->local, sdata, &event); 6488 sdata_info(sdata, "associated\n"); 6489 6490 info.success = 1; 6491 } 6492 6493 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6494 struct ieee80211_link_data *link; 6495 6496 if (!assoc_data->link[link_id].bss) 6497 continue; 6498 6499 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6500 ether_addr_copy(resp.links[link_id].addr, 6501 assoc_data->link[link_id].addr); 6502 resp.links[link_id].status = assoc_data->link[link_id].status; 6503 6504 link = sdata_dereference(sdata->link[link_id], sdata); 6505 if (!link) 6506 continue; 6507 6508 /* get uapsd queues configuration - same for all links */ 6509 resp.uapsd_queues = 0; 6510 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6511 if (link->tx_conf[ac].uapsd) 6512 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6513 } 6514 6515 if (ieee80211_vif_is_mld(&sdata->vif)) { 6516 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6517 resp.ap_mld_addr = ap_mld_addr; 6518 } 6519 6520 ieee80211_destroy_assoc_data(sdata, 6521 status_code == WLAN_STATUS_SUCCESS ? 6522 ASSOC_SUCCESS : 6523 ASSOC_REJECTED); 6524 6525 resp.buf = (u8 *)mgmt; 6526 resp.len = len; 6527 resp.req_ies = ifmgd->assoc_req_ies; 6528 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6529 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6530 notify_driver: 6531 drv_mgd_complete_tx(sdata->local, sdata, &info); 6532 kfree(elems); 6533 return; 6534 abandon_assoc: 6535 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6536 goto notify_driver; 6537 } 6538 6539 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6540 struct ieee80211_mgmt *mgmt, size_t len, 6541 struct ieee80211_rx_status *rx_status) 6542 { 6543 struct ieee80211_sub_if_data *sdata = link->sdata; 6544 struct ieee80211_local *local = sdata->local; 6545 struct ieee80211_bss *bss; 6546 struct ieee80211_channel *channel; 6547 6548 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6549 6550 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6551 ieee80211_rx_status_to_khz(rx_status)); 6552 if (!channel) 6553 return; 6554 6555 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6556 if (bss) { 6557 link->conf->beacon_rate = bss->beacon_rate; 6558 ieee80211_rx_bss_put(local, bss); 6559 } 6560 } 6561 6562 6563 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6564 struct sk_buff *skb) 6565 { 6566 struct ieee80211_sub_if_data *sdata = link->sdata; 6567 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6568 struct ieee80211_if_managed *ifmgd; 6569 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6570 struct ieee80211_channel *channel; 6571 size_t baselen, len = skb->len; 6572 6573 ifmgd = &sdata->u.mgd; 6574 6575 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6576 6577 /* 6578 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6579 * "If a 6 GHz AP receives a Probe Request frame and responds with 6580 * a Probe Response frame [..], the Address 1 field of the Probe 6581 * Response frame shall be set to the broadcast address [..]" 6582 * So, on 6GHz band we should also accept broadcast responses. 6583 */ 6584 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6585 rx_status->freq); 6586 if (!channel) 6587 return; 6588 6589 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6590 (channel->band != NL80211_BAND_6GHZ || 6591 !is_broadcast_ether_addr(mgmt->da))) 6592 return; /* ignore ProbeResp to foreign address */ 6593 6594 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6595 if (baselen > len) 6596 return; 6597 6598 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6599 6600 if (ifmgd->associated && 6601 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6602 ieee80211_reset_ap_probe(sdata); 6603 } 6604 6605 /* 6606 * This is the canonical list of information elements we care about, 6607 * the filter code also gives us all changes to the Microsoft OUI 6608 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6609 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6610 * changes to requested client power. 6611 * 6612 * We implement beacon filtering in software since that means we can 6613 * avoid processing the frame here and in cfg80211, and userspace 6614 * will not be able to tell whether the hardware supports it or not. 6615 * 6616 * XXX: This list needs to be dynamic -- userspace needs to be able to 6617 * add items it requires. It also needs to be able to tell us to 6618 * look out for other vendor IEs. 6619 */ 6620 static const u64 care_about_ies = 6621 (1ULL << WLAN_EID_COUNTRY) | 6622 (1ULL << WLAN_EID_ERP_INFO) | 6623 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6624 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6625 (1ULL << WLAN_EID_HT_CAPABILITY) | 6626 (1ULL << WLAN_EID_HT_OPERATION) | 6627 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6628 6629 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6630 struct ieee80211_if_managed *ifmgd, 6631 struct ieee80211_bss_conf *bss_conf, 6632 struct ieee80211_local *local, 6633 struct ieee80211_rx_status *rx_status) 6634 { 6635 struct ieee80211_sub_if_data *sdata = link->sdata; 6636 6637 /* Track average RSSI from the Beacon frames of the current AP */ 6638 6639 if (!link->u.mgd.tracking_signal_avg) { 6640 link->u.mgd.tracking_signal_avg = true; 6641 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6642 link->u.mgd.last_cqm_event_signal = 0; 6643 link->u.mgd.count_beacon_signal = 1; 6644 link->u.mgd.last_ave_beacon_signal = 0; 6645 } else { 6646 link->u.mgd.count_beacon_signal++; 6647 } 6648 6649 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6650 -rx_status->signal); 6651 6652 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6653 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6654 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6655 int last_sig = link->u.mgd.last_ave_beacon_signal; 6656 struct ieee80211_event event = { 6657 .type = RSSI_EVENT, 6658 }; 6659 6660 /* 6661 * if signal crosses either of the boundaries, invoke callback 6662 * with appropriate parameters 6663 */ 6664 if (sig > ifmgd->rssi_max_thold && 6665 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6666 link->u.mgd.last_ave_beacon_signal = sig; 6667 event.u.rssi.data = RSSI_EVENT_HIGH; 6668 drv_event_callback(local, sdata, &event); 6669 } else if (sig < ifmgd->rssi_min_thold && 6670 (last_sig >= ifmgd->rssi_max_thold || 6671 last_sig == 0)) { 6672 link->u.mgd.last_ave_beacon_signal = sig; 6673 event.u.rssi.data = RSSI_EVENT_LOW; 6674 drv_event_callback(local, sdata, &event); 6675 } 6676 } 6677 6678 if (bss_conf->cqm_rssi_thold && 6679 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6680 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6681 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6682 int last_event = link->u.mgd.last_cqm_event_signal; 6683 int thold = bss_conf->cqm_rssi_thold; 6684 int hyst = bss_conf->cqm_rssi_hyst; 6685 6686 if (sig < thold && 6687 (last_event == 0 || sig < last_event - hyst)) { 6688 link->u.mgd.last_cqm_event_signal = sig; 6689 ieee80211_cqm_rssi_notify( 6690 &sdata->vif, 6691 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6692 sig, GFP_KERNEL); 6693 } else if (sig > thold && 6694 (last_event == 0 || sig > last_event + hyst)) { 6695 link->u.mgd.last_cqm_event_signal = sig; 6696 ieee80211_cqm_rssi_notify( 6697 &sdata->vif, 6698 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6699 sig, GFP_KERNEL); 6700 } 6701 } 6702 6703 if (bss_conf->cqm_rssi_low && 6704 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6705 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6706 int last_event = link->u.mgd.last_cqm_event_signal; 6707 int low = bss_conf->cqm_rssi_low; 6708 int high = bss_conf->cqm_rssi_high; 6709 6710 if (sig < low && 6711 (last_event == 0 || last_event >= low)) { 6712 link->u.mgd.last_cqm_event_signal = sig; 6713 ieee80211_cqm_rssi_notify( 6714 &sdata->vif, 6715 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6716 sig, GFP_KERNEL); 6717 } else if (sig > high && 6718 (last_event == 0 || last_event <= high)) { 6719 link->u.mgd.last_cqm_event_signal = sig; 6720 ieee80211_cqm_rssi_notify( 6721 &sdata->vif, 6722 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6723 sig, GFP_KERNEL); 6724 } 6725 } 6726 } 6727 6728 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6729 struct cfg80211_bss *bss) 6730 { 6731 if (ether_addr_equal(tx_bssid, bss->bssid)) 6732 return true; 6733 if (!bss->transmitted_bss) 6734 return false; 6735 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6736 } 6737 6738 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6739 struct wiphy_work *work) 6740 { 6741 struct ieee80211_sub_if_data *sdata = 6742 container_of(work, struct ieee80211_sub_if_data, 6743 u.mgd.ml_reconf_work.work); 6744 u16 new_valid_links, new_active_links, new_dormant_links; 6745 int ret; 6746 6747 if (!sdata->u.mgd.removed_links) 6748 return; 6749 6750 sdata_info(sdata, 6751 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6752 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6753 6754 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6755 if (new_valid_links == sdata->vif.valid_links) 6756 return; 6757 6758 if (!new_valid_links || 6759 !(new_valid_links & ~sdata->vif.dormant_links)) { 6760 sdata_info(sdata, "No valid links after reconfiguration\n"); 6761 ret = -EINVAL; 6762 goto out; 6763 } 6764 6765 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6766 if (new_active_links != sdata->vif.active_links) { 6767 if (!new_active_links) 6768 new_active_links = 6769 BIT(ffs(new_valid_links & 6770 ~sdata->vif.dormant_links) - 1); 6771 6772 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6773 if (ret) { 6774 sdata_info(sdata, 6775 "Failed setting active links\n"); 6776 goto out; 6777 } 6778 } 6779 6780 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6781 6782 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6783 new_dormant_links); 6784 if (ret) 6785 sdata_info(sdata, "Failed setting valid links\n"); 6786 6787 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6788 6789 out: 6790 if (!ret) 6791 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6792 else 6793 __ieee80211_disconnect(sdata); 6794 6795 sdata->u.mgd.removed_links = 0; 6796 } 6797 6798 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6799 struct ieee802_11_elems *elems) 6800 { 6801 const struct element *sub; 6802 unsigned long removed_links = 0; 6803 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6804 u8 link_id; 6805 u32 delay; 6806 6807 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6808 return; 6809 6810 /* Directly parse the sub elements as the common information doesn't 6811 * hold any useful information. 6812 */ 6813 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6814 elems->ml_reconf_len) { 6815 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6816 u8 *pos = prof->variable; 6817 u16 control; 6818 6819 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6820 continue; 6821 6822 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6823 sub->datalen)) 6824 return; 6825 6826 control = le16_to_cpu(prof->control); 6827 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6828 6829 removed_links |= BIT(link_id); 6830 6831 /* the MAC address should not be included, but handle it */ 6832 if (control & 6833 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6834 pos += 6; 6835 6836 /* According to Draft P802.11be_D3.0, the control should 6837 * include the AP Removal Timer present. If the AP Removal Timer 6838 * is not present assume immediate removal. 6839 */ 6840 if (control & 6841 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6842 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6843 } 6844 6845 removed_links &= sdata->vif.valid_links; 6846 if (!removed_links) { 6847 /* In case the removal was cancelled, abort it */ 6848 if (sdata->u.mgd.removed_links) { 6849 sdata->u.mgd.removed_links = 0; 6850 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6851 &sdata->u.mgd.ml_reconf_work); 6852 } 6853 return; 6854 } 6855 6856 delay = 0; 6857 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6858 struct ieee80211_bss_conf *link_conf = 6859 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6860 u32 link_delay; 6861 6862 if (!link_conf) { 6863 removed_links &= ~BIT(link_id); 6864 continue; 6865 } 6866 6867 if (link_removal_timeout[link_id] < 1) 6868 link_delay = 0; 6869 else 6870 link_delay = link_conf->beacon_int * 6871 (link_removal_timeout[link_id] - 1); 6872 6873 if (!delay) 6874 delay = link_delay; 6875 else 6876 delay = min(delay, link_delay); 6877 } 6878 6879 sdata->u.mgd.removed_links = removed_links; 6880 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6881 &sdata->u.mgd.ml_reconf_work, 6882 TU_TO_JIFFIES(delay)); 6883 } 6884 6885 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6886 u16 active_links, u16 dormant_links, 6887 u16 suspended_links) 6888 { 6889 u64 changed = 0; 6890 int ret; 6891 6892 if (!active_links) { 6893 ret = -EINVAL; 6894 goto out; 6895 } 6896 6897 /* If there is an active negotiated TTLM, it should be discarded by 6898 * the new negotiated/advertised TTLM. 6899 */ 6900 if (sdata->vif.neg_ttlm.valid) { 6901 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6902 sdata->vif.suspended_links = 0; 6903 changed = BSS_CHANGED_MLD_TTLM; 6904 } 6905 6906 if (sdata->vif.active_links != active_links) { 6907 /* usable links are affected when active_links are changed, 6908 * so notify the driver about the status change 6909 */ 6910 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6911 active_links &= sdata->vif.active_links; 6912 if (!active_links) 6913 active_links = 6914 BIT(__ffs(sdata->vif.valid_links & 6915 ~dormant_links)); 6916 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6917 if (ret) { 6918 sdata_info(sdata, "Failed to set TTLM active links\n"); 6919 goto out; 6920 } 6921 } 6922 6923 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6924 dormant_links); 6925 if (ret) { 6926 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6927 goto out; 6928 } 6929 6930 sdata->vif.suspended_links = suspended_links; 6931 if (sdata->vif.suspended_links) 6932 changed |= BSS_CHANGED_MLD_TTLM; 6933 6934 ieee80211_vif_cfg_change_notify(sdata, changed); 6935 6936 out: 6937 if (ret) 6938 ieee80211_disconnect(&sdata->vif, false); 6939 6940 return ret; 6941 } 6942 6943 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6944 struct wiphy_work *work) 6945 { 6946 u16 new_active_links, new_dormant_links; 6947 struct ieee80211_sub_if_data *sdata = 6948 container_of(work, struct ieee80211_sub_if_data, 6949 u.mgd.ttlm_work.work); 6950 6951 new_active_links = sdata->u.mgd.ttlm_info.map & 6952 sdata->vif.valid_links; 6953 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6954 sdata->vif.valid_links; 6955 6956 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6957 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6958 0)) 6959 return; 6960 6961 sdata->u.mgd.ttlm_info.active = true; 6962 sdata->u.mgd.ttlm_info.switch_time = 0; 6963 } 6964 6965 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6966 { 6967 if (bm_size == 1) 6968 return *data; 6969 else 6970 return get_unaligned_le16(data); 6971 } 6972 6973 static int 6974 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6975 const struct ieee80211_ttlm_elem *ttlm, 6976 struct ieee80211_adv_ttlm_info *ttlm_info) 6977 { 6978 /* The element size was already validated in 6979 * ieee80211_tid_to_link_map_size_ok() 6980 */ 6981 u8 control, link_map_presence, map_size, tid; 6982 u8 *pos; 6983 6984 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6985 pos = (void *)ttlm->optional; 6986 control = ttlm->control; 6987 6988 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6989 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6990 return 0; 6991 6992 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6993 IEEE80211_TTLM_DIRECTION_BOTH) { 6994 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6995 return -EINVAL; 6996 } 6997 6998 link_map_presence = *pos; 6999 pos++; 7000 7001 ttlm_info->switch_time = get_unaligned_le16(pos); 7002 7003 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 7004 * by 1. 7005 */ 7006 if (!ttlm_info->switch_time) 7007 ttlm_info->switch_time = 1; 7008 7009 pos += 2; 7010 7011 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 7012 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 7013 pos += 3; 7014 } 7015 7016 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7017 map_size = 1; 7018 else 7019 map_size = 2; 7020 7021 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 7022 * not advertise a TID-to-link mapping that does not map all TIDs to the 7023 * same link set, reject frame if not all links have mapping 7024 */ 7025 if (link_map_presence != 0xff) { 7026 sdata_info(sdata, 7027 "Invalid advertised T2L mapping presence indicator\n"); 7028 return -EINVAL; 7029 } 7030 7031 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7032 if (!ttlm_info->map) { 7033 sdata_info(sdata, 7034 "Invalid advertised T2L map for TID 0\n"); 7035 return -EINVAL; 7036 } 7037 7038 pos += map_size; 7039 7040 for (tid = 1; tid < 8; tid++) { 7041 u16 map = ieee80211_get_ttlm(map_size, pos); 7042 7043 if (map != ttlm_info->map) { 7044 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7045 tid); 7046 return -EINVAL; 7047 } 7048 7049 pos += map_size; 7050 } 7051 return 0; 7052 } 7053 7054 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7055 struct ieee802_11_elems *elems, 7056 u64 beacon_ts) 7057 { 7058 u8 i; 7059 int ret; 7060 7061 if (!ieee80211_vif_is_mld(&sdata->vif)) 7062 return; 7063 7064 if (!elems->ttlm_num) { 7065 if (sdata->u.mgd.ttlm_info.switch_time) { 7066 /* if a planned TID-to-link mapping was cancelled - 7067 * abort it 7068 */ 7069 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7070 &sdata->u.mgd.ttlm_work); 7071 } else if (sdata->u.mgd.ttlm_info.active) { 7072 /* if no TID-to-link element, set to default mapping in 7073 * which all TIDs are mapped to all setup links 7074 */ 7075 ret = ieee80211_vif_set_links(sdata, 7076 sdata->vif.valid_links, 7077 0); 7078 if (ret) { 7079 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7080 return; 7081 } 7082 ieee80211_vif_cfg_change_notify(sdata, 7083 BSS_CHANGED_MLD_VALID_LINKS); 7084 } 7085 memset(&sdata->u.mgd.ttlm_info, 0, 7086 sizeof(sdata->u.mgd.ttlm_info)); 7087 return; 7088 } 7089 7090 for (i = 0; i < elems->ttlm_num; i++) { 7091 struct ieee80211_adv_ttlm_info ttlm_info; 7092 u32 res; 7093 7094 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7095 &ttlm_info); 7096 7097 if (res) { 7098 __ieee80211_disconnect(sdata); 7099 return; 7100 } 7101 7102 if (ttlm_info.switch_time) { 7103 u16 beacon_ts_tu, st_tu, delay; 7104 u32 delay_jiffies; 7105 u64 mask; 7106 7107 /* The t2l map switch time is indicated with a partial 7108 * TSF value (bits 10 to 25), get the partial beacon TS 7109 * as well, and calc the delay to the start time. 7110 */ 7111 mask = GENMASK_ULL(25, 10); 7112 beacon_ts_tu = (beacon_ts & mask) >> 10; 7113 st_tu = ttlm_info.switch_time; 7114 delay = st_tu - beacon_ts_tu; 7115 7116 /* 7117 * If the switch time is far in the future, then it 7118 * could also be the previous switch still being 7119 * announced. 7120 * We can simply ignore it for now, if it is a future 7121 * switch the AP will continue to announce it anyway. 7122 */ 7123 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7124 return; 7125 7126 delay_jiffies = TU_TO_JIFFIES(delay); 7127 7128 /* Link switching can take time, so schedule it 7129 * 100ms before to be ready on time 7130 */ 7131 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7132 delay_jiffies -= 7133 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7134 else 7135 delay_jiffies = 0; 7136 7137 sdata->u.mgd.ttlm_info = ttlm_info; 7138 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7139 &sdata->u.mgd.ttlm_work); 7140 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7141 &sdata->u.mgd.ttlm_work, 7142 delay_jiffies); 7143 return; 7144 } 7145 } 7146 } 7147 7148 static void 7149 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7150 int reporting_link_id, 7151 struct ieee802_11_elems *elems) 7152 { 7153 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7154 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7155 const struct element *sub; 7156 const u8 *subelems; 7157 size_t subelems_len; 7158 u8 common_size; 7159 int link_id; 7160 7161 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7162 return; 7163 7164 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7165 subelems = (u8 *)elems->ml_basic + common_size; 7166 subelems_len = elems->ml_basic_len - common_size; 7167 7168 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7169 subelems, subelems_len) { 7170 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7171 struct ieee80211_link_data *link; 7172 ssize_t len; 7173 7174 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7175 sub->datalen)) 7176 continue; 7177 7178 link_id = le16_get_bits(prof->control, 7179 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7180 /* need a valid link ID, but also not our own, both AP bugs */ 7181 if (link_id == reporting_link_id || 7182 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7183 continue; 7184 7185 link = sdata_dereference(sdata->link[link_id], sdata); 7186 if (!link) 7187 continue; 7188 7189 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7190 NULL, 0, 7191 IEEE80211_MLE_SUBELEM_FRAGMENT); 7192 if (WARN_ON(len < 0)) 7193 continue; 7194 7195 sta_profiles[link_id] = sub; 7196 sta_profiles_len[link_id] = len; 7197 } 7198 7199 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7200 struct ieee80211_mle_per_sta_profile *prof; 7201 struct ieee802_11_elems *prof_elems; 7202 struct ieee80211_link_data *link; 7203 ssize_t len; 7204 7205 if (link_id == reporting_link_id) 7206 continue; 7207 7208 link = sdata_dereference(sdata->link[link_id], sdata); 7209 if (!link) 7210 continue; 7211 7212 if (!sta_profiles[link_id]) { 7213 prof_elems = NULL; 7214 goto handle; 7215 } 7216 7217 /* we can defragment in-place, won't use the buffer again */ 7218 len = cfg80211_defragment_element(sta_profiles[link_id], 7219 subelems, subelems_len, 7220 (void *)sta_profiles[link_id], 7221 sta_profiles_len[link_id], 7222 IEEE80211_MLE_SUBELEM_FRAGMENT); 7223 if (WARN_ON(len != sta_profiles_len[link_id])) 7224 continue; 7225 7226 prof = (void *)sta_profiles[link_id]; 7227 prof_elems = ieee802_11_parse_elems(prof->variable + 7228 (prof->sta_info_len - 1), 7229 len - 7230 (prof->sta_info_len - 1), 7231 false, NULL); 7232 7233 /* memory allocation failed - let's hope that's transient */ 7234 if (!prof_elems) 7235 continue; 7236 7237 handle: 7238 /* 7239 * FIXME: the timings here are obviously incorrect, 7240 * but only older Intel drivers seem to care, and 7241 * those don't have MLO. If you really need this, 7242 * the problem is having to calculate it with the 7243 * TSF offset etc. The device_timestamp is still 7244 * correct, of course. 7245 */ 7246 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7247 IEEE80211_CSA_SOURCE_OTHER_LINK); 7248 kfree(prof_elems); 7249 } 7250 } 7251 7252 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7253 const struct ieee802_11_elems *elems) 7254 { 7255 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7256 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7257 7258 if (!elems->ssid) 7259 return false; 7260 7261 /* hidden SSID: zero length */ 7262 if (elems->ssid_len == 0) 7263 return false; 7264 7265 if (elems->ssid_len != cfg->ssid_len) 7266 return true; 7267 7268 /* hidden SSID: zeroed out */ 7269 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7270 return false; 7271 7272 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7273 } 7274 7275 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7276 struct ieee80211_hdr *hdr, size_t len, 7277 struct ieee80211_rx_status *rx_status) 7278 { 7279 struct ieee80211_sub_if_data *sdata = link->sdata; 7280 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7281 struct ieee80211_bss_conf *bss_conf = link->conf; 7282 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7283 struct ieee80211_mgmt *mgmt = (void *) hdr; 7284 struct ieee80211_ext *ext = NULL; 7285 size_t baselen; 7286 struct ieee802_11_elems *elems; 7287 struct ieee80211_local *local = sdata->local; 7288 struct ieee80211_chanctx_conf *chanctx_conf; 7289 struct ieee80211_supported_band *sband; 7290 struct ieee80211_channel *chan; 7291 struct link_sta_info *link_sta; 7292 struct sta_info *sta; 7293 u64 changed = 0; 7294 bool erp_valid; 7295 u8 erp_value = 0; 7296 u32 ncrc = 0; 7297 u8 *bssid, *variable = mgmt->u.beacon.variable; 7298 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7299 struct ieee80211_elems_parse_params parse_params = { 7300 .mode = link->u.mgd.conn.mode, 7301 .link_id = -1, 7302 .from_ap = true, 7303 }; 7304 7305 lockdep_assert_wiphy(local->hw.wiphy); 7306 7307 /* Process beacon from the current BSS */ 7308 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7309 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7310 ext = (void *)mgmt; 7311 variable = ext->u.s1g_beacon.variable + 7312 ieee80211_s1g_optional_len(ext->frame_control); 7313 } 7314 7315 baselen = (u8 *) variable - (u8 *) mgmt; 7316 if (baselen > len) 7317 return; 7318 7319 parse_params.start = variable; 7320 parse_params.len = len - baselen; 7321 7322 rcu_read_lock(); 7323 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7324 if (!chanctx_conf) { 7325 rcu_read_unlock(); 7326 return; 7327 } 7328 7329 if (ieee80211_rx_status_to_khz(rx_status) != 7330 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 7331 rcu_read_unlock(); 7332 return; 7333 } 7334 chan = chanctx_conf->def.chan; 7335 rcu_read_unlock(); 7336 7337 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7338 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7339 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7340 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7341 elems = ieee802_11_parse_elems_full(&parse_params); 7342 if (!elems) 7343 return; 7344 7345 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7346 7347 if (elems->dtim_period) 7348 link->u.mgd.dtim_period = elems->dtim_period; 7349 link->u.mgd.have_beacon = true; 7350 ifmgd->assoc_data->need_beacon = false; 7351 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7352 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7353 bss_conf->sync_tsf = 7354 le64_to_cpu(mgmt->u.beacon.timestamp); 7355 bss_conf->sync_device_ts = 7356 rx_status->device_timestamp; 7357 bss_conf->sync_dtim_count = elems->dtim_count; 7358 } 7359 7360 if (elems->mbssid_config_ie) 7361 bss_conf->profile_periodicity = 7362 elems->mbssid_config_ie->profile_periodicity; 7363 else 7364 bss_conf->profile_periodicity = 0; 7365 7366 if (elems->ext_capab_len >= 11 && 7367 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7368 bss_conf->ema_ap = true; 7369 else 7370 bss_conf->ema_ap = false; 7371 7372 /* continue assoc process */ 7373 ifmgd->assoc_data->timeout = jiffies; 7374 ifmgd->assoc_data->timeout_started = true; 7375 run_again(sdata, ifmgd->assoc_data->timeout); 7376 kfree(elems); 7377 return; 7378 } 7379 7380 if (!ifmgd->associated || 7381 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7382 return; 7383 bssid = link->u.mgd.bssid; 7384 7385 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7386 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7387 local, rx_status); 7388 7389 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7390 mlme_dbg_ratelimited(sdata, 7391 "cancelling AP probe due to a received beacon\n"); 7392 ieee80211_reset_ap_probe(sdata); 7393 } 7394 7395 /* 7396 * Push the beacon loss detection into the future since 7397 * we are processing a beacon from the AP just now. 7398 */ 7399 ieee80211_sta_reset_beacon_monitor(sdata); 7400 7401 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7402 * element (which carries the beacon interval). Don't forget to add a 7403 * bit to care_about_ies[] above if mac80211 is interested in a 7404 * changing S1G element. 7405 */ 7406 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7407 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7408 parse_params.bss = bss_conf->bss; 7409 parse_params.filter = care_about_ies; 7410 parse_params.crc = ncrc; 7411 elems = ieee802_11_parse_elems_full(&parse_params); 7412 if (!elems) 7413 return; 7414 7415 if (rx_status->flag & RX_FLAG_DECRYPTED && 7416 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7417 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7418 sdata->vif.cfg.ap_addr); 7419 __ieee80211_disconnect(sdata); 7420 return; 7421 } 7422 7423 ncrc = elems->crc; 7424 7425 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7426 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7427 if (local->hw.conf.dynamic_ps_timeout > 0) { 7428 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7429 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7430 ieee80211_hw_config(local, -1, 7431 IEEE80211_CONF_CHANGE_PS); 7432 } 7433 ieee80211_send_nullfunc(local, sdata, false); 7434 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7435 local->pspolling = true; 7436 7437 /* 7438 * Here is assumed that the driver will be 7439 * able to send ps-poll frame and receive a 7440 * response even though power save mode is 7441 * enabled, but some drivers might require 7442 * to disable power save here. This needs 7443 * to be investigated. 7444 */ 7445 ieee80211_send_pspoll(local, sdata); 7446 } 7447 } 7448 7449 if (sdata->vif.p2p || 7450 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7451 struct ieee80211_p2p_noa_attr noa = {}; 7452 int ret; 7453 7454 ret = cfg80211_get_p2p_attr(variable, 7455 len - baselen, 7456 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7457 (u8 *) &noa, sizeof(noa)); 7458 if (ret >= 2) { 7459 if (link->u.mgd.p2p_noa_index != noa.index) { 7460 /* valid noa_attr and index changed */ 7461 link->u.mgd.p2p_noa_index = noa.index; 7462 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7463 changed |= BSS_CHANGED_P2P_PS; 7464 /* 7465 * make sure we update all information, the CRC 7466 * mechanism doesn't look at P2P attributes. 7467 */ 7468 link->u.mgd.beacon_crc_valid = false; 7469 } 7470 } else if (link->u.mgd.p2p_noa_index != -1) { 7471 /* noa_attr not found and we had valid noa_attr before */ 7472 link->u.mgd.p2p_noa_index = -1; 7473 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7474 changed |= BSS_CHANGED_P2P_PS; 7475 link->u.mgd.beacon_crc_valid = false; 7476 } 7477 } 7478 7479 /* 7480 * Update beacon timing and dtim count on every beacon appearance. This 7481 * will allow the driver to use the most updated values. Do it before 7482 * comparing this one with last received beacon. 7483 * IMPORTANT: These parameters would possibly be out of sync by the time 7484 * the driver will use them. The synchronized view is currently 7485 * guaranteed only in certain callbacks. 7486 */ 7487 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7488 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7489 bss_conf->sync_tsf = 7490 le64_to_cpu(mgmt->u.beacon.timestamp); 7491 bss_conf->sync_device_ts = 7492 rx_status->device_timestamp; 7493 bss_conf->sync_dtim_count = elems->dtim_count; 7494 } 7495 7496 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7497 (ext && ieee80211_is_s1g_short_beacon(ext->frame_control, 7498 parse_params.start, 7499 parse_params.len))) 7500 goto free; 7501 link->u.mgd.beacon_crc = ncrc; 7502 link->u.mgd.beacon_crc_valid = true; 7503 7504 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7505 7506 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7507 rx_status->device_timestamp, 7508 elems, elems, 7509 IEEE80211_CSA_SOURCE_BEACON); 7510 7511 /* note that after this elems->ml_basic can no longer be used fully */ 7512 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7513 7514 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7515 7516 if (!sdata->u.mgd.epcs.enabled && 7517 !link->u.mgd.disable_wmm_tracking && 7518 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7519 elems->wmm_param_len, 7520 elems->mu_edca_param_set)) 7521 changed |= BSS_CHANGED_QOS; 7522 7523 /* 7524 * If we haven't had a beacon before, tell the driver about the 7525 * DTIM period (and beacon timing if desired) now. 7526 */ 7527 if (!link->u.mgd.have_beacon) { 7528 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7529 bss_conf->dtim_period = elems->dtim_period ?: 1; 7530 7531 changed |= BSS_CHANGED_BEACON_INFO; 7532 link->u.mgd.have_beacon = true; 7533 7534 ieee80211_recalc_ps(local); 7535 7536 ieee80211_recalc_ps_vif(sdata); 7537 } 7538 7539 if (elems->erp_info) { 7540 erp_valid = true; 7541 erp_value = elems->erp_info[0]; 7542 } else { 7543 erp_valid = false; 7544 } 7545 7546 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7547 changed |= ieee80211_handle_bss_capability(link, 7548 le16_to_cpu(mgmt->u.beacon.capab_info), 7549 erp_valid, erp_value); 7550 7551 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7552 if (WARN_ON(!sta)) { 7553 goto free; 7554 } 7555 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7556 lockdep_is_held(&local->hw.wiphy->mtx)); 7557 if (WARN_ON(!link_sta)) { 7558 goto free; 7559 } 7560 7561 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7562 goto free; 7563 7564 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7565 7566 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7567 7568 if (ieee80211_config_bw(link, elems, true, &changed, 7569 IEEE80211_STYPE_BEACON)) { 7570 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7571 WLAN_REASON_DEAUTH_LEAVING, 7572 true, deauth_buf); 7573 ieee80211_report_disconnect(sdata, deauth_buf, 7574 sizeof(deauth_buf), true, 7575 WLAN_REASON_DEAUTH_LEAVING, 7576 false); 7577 goto free; 7578 } 7579 7580 if (elems->opmode_notif) 7581 ieee80211_vht_handle_opmode(sdata, link_sta, 7582 *elems->opmode_notif, 7583 rx_status->band); 7584 7585 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7586 elems->country_elem, 7587 elems->country_elem_len, 7588 elems->pwr_constr_elem, 7589 elems->cisco_dtpc_elem); 7590 7591 ieee80211_ml_reconfiguration(sdata, elems); 7592 ieee80211_process_adv_ttlm(sdata, elems, 7593 le64_to_cpu(mgmt->u.beacon.timestamp)); 7594 7595 ieee80211_link_info_change_notify(sdata, link, changed); 7596 free: 7597 kfree(elems); 7598 } 7599 7600 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7601 struct ieee80211_neg_ttlm neg_ttlm) 7602 { 7603 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7604 u8 i; 7605 7606 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7607 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7608 7609 /* If there is an active TTLM, unset previously suspended links */ 7610 if (sdata->vif.neg_ttlm.valid) 7611 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7612 7613 /* exclude links that are already disabled by advertised TTLM */ 7614 new_active_links = 7615 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7616 new_suspended_links = 7617 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7618 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7619 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7620 new_dormant_links, new_suspended_links)) 7621 return; 7622 7623 sdata->vif.neg_ttlm = neg_ttlm; 7624 sdata->vif.neg_ttlm.valid = true; 7625 } 7626 7627 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7628 struct wiphy_work *work) 7629 { 7630 struct ieee80211_sub_if_data *sdata = 7631 container_of(work, struct ieee80211_sub_if_data, 7632 u.mgd.neg_ttlm_timeout_work.work); 7633 7634 sdata_info(sdata, 7635 "No negotiated TTLM response from AP, disconnecting.\n"); 7636 7637 __ieee80211_disconnect(sdata); 7638 } 7639 7640 static void 7641 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7642 struct ieee80211_neg_ttlm *neg_ttlm) 7643 { 7644 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7645 7646 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7647 sizeof(neg_ttlm->downlink))) { 7648 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7649 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7650 } else { 7651 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7652 } 7653 7654 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7655 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7656 __le16 map; 7657 7658 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7659 7660 pos = skb_put(skb, len + 2); 7661 *pos++ = WLAN_EID_EXTENSION; 7662 len_pos = pos++; 7663 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7664 *pos++ = direction[i]; 7665 map_ind_pos = pos++; 7666 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7667 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7668 cpu_to_le16(neg_ttlm->uplink[tid]) : 7669 cpu_to_le16(neg_ttlm->downlink[tid]); 7670 if (!map) 7671 continue; 7672 7673 len += 2; 7674 map_ind |= BIT(tid); 7675 skb_put_data(skb, &map, sizeof(map)); 7676 } 7677 7678 *map_ind_pos = map_ind; 7679 *len_pos = len; 7680 7681 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7682 break; 7683 } 7684 } 7685 7686 static void 7687 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7688 struct ieee80211_neg_ttlm *neg_ttlm, 7689 u8 dialog_token) 7690 { 7691 struct ieee80211_local *local = sdata->local; 7692 struct ieee80211_mgmt *mgmt; 7693 struct sk_buff *skb; 7694 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7695 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7696 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7697 7698 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7699 if (!skb) 7700 return; 7701 7702 skb_reserve(skb, local->tx_headroom); 7703 mgmt = skb_put_zero(skb, hdr_len); 7704 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7705 IEEE80211_STYPE_ACTION); 7706 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7707 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7708 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7709 7710 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7711 mgmt->u.action.u.ttlm_req.action_code = 7712 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7713 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7714 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7715 ieee80211_tx_skb(sdata, skb); 7716 } 7717 7718 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7719 struct cfg80211_ttlm_params *params) 7720 { 7721 struct ieee80211_neg_ttlm neg_ttlm = {}; 7722 u8 i; 7723 7724 if (!ieee80211_vif_is_mld(&sdata->vif) || 7725 !(sdata->vif.cfg.mld_capa_op & 7726 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7727 return -EINVAL; 7728 7729 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7730 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7731 (params->ulink[i] & ~sdata->vif.valid_links)) 7732 return -EINVAL; 7733 7734 neg_ttlm.downlink[i] = params->dlink[i]; 7735 neg_ttlm.uplink[i] = params->ulink[i]; 7736 } 7737 7738 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7739 NEG_TTLM_RES_ACCEPT) 7740 return -EINVAL; 7741 7742 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7743 sdata->u.mgd.dialog_token_alloc++; 7744 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7745 sdata->u.mgd.dialog_token_alloc); 7746 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7747 &sdata->u.mgd.neg_ttlm_timeout_work); 7748 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7749 &sdata->u.mgd.neg_ttlm_timeout_work, 7750 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7751 return 0; 7752 } 7753 7754 static void 7755 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7756 enum ieee80211_neg_ttlm_res ttlm_res, 7757 u8 dialog_token, 7758 struct ieee80211_neg_ttlm *neg_ttlm) 7759 { 7760 struct ieee80211_local *local = sdata->local; 7761 struct ieee80211_mgmt *mgmt; 7762 struct sk_buff *skb; 7763 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7764 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7765 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7766 u16 status_code; 7767 7768 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7769 if (!skb) 7770 return; 7771 7772 skb_reserve(skb, local->tx_headroom); 7773 mgmt = skb_put_zero(skb, hdr_len); 7774 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7775 IEEE80211_STYPE_ACTION); 7776 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7777 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7778 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7779 7780 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7781 mgmt->u.action.u.ttlm_res.action_code = 7782 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7783 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7784 switch (ttlm_res) { 7785 default: 7786 WARN_ON(1); 7787 fallthrough; 7788 case NEG_TTLM_RES_REJECT: 7789 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7790 break; 7791 case NEG_TTLM_RES_ACCEPT: 7792 status_code = WLAN_STATUS_SUCCESS; 7793 break; 7794 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7795 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7796 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7797 break; 7798 } 7799 7800 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7801 ieee80211_tx_skb(sdata, skb); 7802 } 7803 7804 static int 7805 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7806 const struct ieee80211_ttlm_elem *ttlm, 7807 struct ieee80211_neg_ttlm *neg_ttlm, 7808 u8 *direction) 7809 { 7810 u8 control, link_map_presence, map_size, tid; 7811 u8 *pos; 7812 7813 /* The element size was already validated in 7814 * ieee80211_tid_to_link_map_size_ok() 7815 */ 7816 pos = (void *)ttlm->optional; 7817 7818 control = ttlm->control; 7819 7820 /* mapping switch time and expected duration fields are not expected 7821 * in case of negotiated TTLM 7822 */ 7823 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7824 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7825 mlme_dbg(sdata, 7826 "Invalid TTLM element in negotiated TTLM request\n"); 7827 return -EINVAL; 7828 } 7829 7830 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7831 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7832 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7833 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7834 } 7835 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7836 return 0; 7837 } 7838 7839 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7840 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7841 *direction != IEEE80211_TTLM_DIRECTION_UP && 7842 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7843 return -EINVAL; 7844 7845 link_map_presence = *pos; 7846 pos++; 7847 7848 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7849 map_size = 1; 7850 else 7851 map_size = 2; 7852 7853 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7854 u16 map; 7855 7856 if (link_map_presence & BIT(tid)) { 7857 map = ieee80211_get_ttlm(map_size, pos); 7858 if (!map) { 7859 mlme_dbg(sdata, 7860 "No active links for TID %d", tid); 7861 return -EINVAL; 7862 } 7863 } else { 7864 map = 0; 7865 } 7866 7867 switch (*direction) { 7868 case IEEE80211_TTLM_DIRECTION_BOTH: 7869 neg_ttlm->downlink[tid] = map; 7870 neg_ttlm->uplink[tid] = map; 7871 break; 7872 case IEEE80211_TTLM_DIRECTION_DOWN: 7873 neg_ttlm->downlink[tid] = map; 7874 break; 7875 case IEEE80211_TTLM_DIRECTION_UP: 7876 neg_ttlm->uplink[tid] = map; 7877 break; 7878 default: 7879 return -EINVAL; 7880 } 7881 pos += map_size; 7882 } 7883 return 0; 7884 } 7885 7886 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7887 struct ieee80211_mgmt *mgmt, size_t len) 7888 { 7889 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7890 size_t ies_len; 7891 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7892 struct ieee802_11_elems *elems = NULL; 7893 struct ieee80211_neg_ttlm neg_ttlm = {}; 7894 7895 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7896 7897 if (!ieee80211_vif_is_mld(&sdata->vif)) 7898 return; 7899 7900 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7901 ies_len = len - offsetof(struct ieee80211_mgmt, 7902 u.action.u.ttlm_req.variable); 7903 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7904 ies_len, true, NULL); 7905 if (!elems) { 7906 ttlm_res = NEG_TTLM_RES_REJECT; 7907 goto out; 7908 } 7909 7910 for (i = 0; i < elems->ttlm_num; i++) { 7911 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7912 &neg_ttlm, &direction[i]) || 7913 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7914 elems->ttlm_num != 1)) { 7915 ttlm_res = NEG_TTLM_RES_REJECT; 7916 goto out; 7917 } 7918 } 7919 7920 if (!elems->ttlm_num || 7921 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7922 ttlm_res = NEG_TTLM_RES_REJECT; 7923 goto out; 7924 } 7925 7926 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7927 if ((neg_ttlm.downlink[i] && 7928 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7929 (neg_ttlm.uplink[i] && 7930 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7931 ttlm_res = NEG_TTLM_RES_REJECT; 7932 goto out; 7933 } 7934 } 7935 7936 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7937 7938 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7939 goto out; 7940 7941 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7942 out: 7943 kfree(elems); 7944 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7945 } 7946 7947 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7948 struct ieee80211_mgmt *mgmt, size_t len) 7949 { 7950 if (!ieee80211_vif_is_mld(&sdata->vif) || 7951 mgmt->u.action.u.ttlm_req.dialog_token != 7952 sdata->u.mgd.dialog_token_alloc) 7953 return; 7954 7955 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7956 &sdata->u.mgd.neg_ttlm_timeout_work); 7957 7958 /* MLD station sends a TID to link mapping request, mainly to handle 7959 * BTM (BSS transition management) request, in which case it needs to 7960 * restrict the active links set. 7961 * In this case it's not expected that the MLD AP will reject the 7962 * negotiated TTLM request. 7963 * This can be better implemented in the future, to handle request 7964 * rejections. 7965 */ 7966 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 7967 __ieee80211_disconnect(sdata); 7968 } 7969 7970 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 7971 { 7972 u16 new_dormant_links; 7973 7974 if (!sdata->vif.neg_ttlm.valid) 7975 return; 7976 7977 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7978 new_dormant_links = 7979 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7980 sdata->vif.suspended_links = 0; 7981 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7982 new_dormant_links); 7983 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7984 BSS_CHANGED_MLD_VALID_LINKS); 7985 } 7986 7987 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7988 struct wiphy_work *work) 7989 { 7990 struct ieee80211_sub_if_data *sdata = 7991 container_of(work, struct ieee80211_sub_if_data, 7992 u.mgd.teardown_ttlm_work); 7993 7994 ieee80211_process_ttlm_teardown(sdata); 7995 } 7996 7997 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7998 { 7999 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8000 struct ieee80211_local *local = sdata->local; 8001 struct ieee80211_mgmt *mgmt; 8002 struct sk_buff *skb; 8003 int frame_len = offsetofend(struct ieee80211_mgmt, 8004 u.action.u.ttlm_tear_down); 8005 struct ieee80211_tx_info *info; 8006 8007 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 8008 if (!skb) 8009 return; 8010 8011 skb_reserve(skb, local->hw.extra_tx_headroom); 8012 mgmt = skb_put_zero(skb, frame_len); 8013 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 8014 IEEE80211_STYPE_ACTION); 8015 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 8016 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 8017 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8018 8019 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 8020 mgmt->u.action.u.ttlm_tear_down.action_code = 8021 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 8022 8023 info = IEEE80211_SKB_CB(skb); 8024 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 8025 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 8026 ieee80211_tx_skb(sdata, skb); 8027 } 8028 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 8029 8030 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8031 struct sk_buff *skb) 8032 { 8033 struct ieee80211_link_data *link = &sdata->deflink; 8034 struct ieee80211_rx_status *rx_status; 8035 struct ieee80211_hdr *hdr; 8036 u16 fc; 8037 8038 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8039 8040 rx_status = (struct ieee80211_rx_status *) skb->cb; 8041 hdr = (struct ieee80211_hdr *) skb->data; 8042 fc = le16_to_cpu(hdr->frame_control); 8043 8044 switch (fc & IEEE80211_FCTL_STYPE) { 8045 case IEEE80211_STYPE_S1G_BEACON: 8046 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8047 break; 8048 } 8049 } 8050 8051 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8052 struct sk_buff *skb) 8053 { 8054 struct ieee80211_link_data *link = &sdata->deflink; 8055 struct ieee80211_rx_status *rx_status; 8056 struct ieee802_11_elems *elems; 8057 struct ieee80211_mgmt *mgmt; 8058 u16 fc; 8059 int ies_len; 8060 8061 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8062 8063 rx_status = (struct ieee80211_rx_status *) skb->cb; 8064 mgmt = (struct ieee80211_mgmt *) skb->data; 8065 fc = le16_to_cpu(mgmt->frame_control); 8066 8067 if (rx_status->link_valid) { 8068 link = sdata_dereference(sdata->link[rx_status->link_id], 8069 sdata); 8070 if (!link) 8071 return; 8072 } 8073 8074 switch (fc & IEEE80211_FCTL_STYPE) { 8075 case IEEE80211_STYPE_BEACON: 8076 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8077 skb->len, rx_status); 8078 break; 8079 case IEEE80211_STYPE_PROBE_RESP: 8080 ieee80211_rx_mgmt_probe_resp(link, skb); 8081 break; 8082 case IEEE80211_STYPE_AUTH: 8083 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8084 break; 8085 case IEEE80211_STYPE_DEAUTH: 8086 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8087 break; 8088 case IEEE80211_STYPE_DISASSOC: 8089 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8090 break; 8091 case IEEE80211_STYPE_ASSOC_RESP: 8092 case IEEE80211_STYPE_REASSOC_RESP: 8093 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8094 break; 8095 case IEEE80211_STYPE_ACTION: 8096 if (!sdata->u.mgd.associated || 8097 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8098 break; 8099 8100 switch (mgmt->u.action.category) { 8101 case WLAN_CATEGORY_SPECTRUM_MGMT: 8102 ies_len = skb->len - 8103 offsetof(struct ieee80211_mgmt, 8104 u.action.u.chan_switch.variable); 8105 8106 if (ies_len < 0) 8107 break; 8108 8109 /* CSA IE cannot be overridden, no need for BSSID */ 8110 elems = ieee802_11_parse_elems( 8111 mgmt->u.action.u.chan_switch.variable, 8112 ies_len, true, NULL); 8113 8114 if (elems && !elems->parse_error) { 8115 enum ieee80211_csa_source src = 8116 IEEE80211_CSA_SOURCE_PROT_ACTION; 8117 8118 ieee80211_sta_process_chanswitch(link, 8119 rx_status->mactime, 8120 rx_status->device_timestamp, 8121 elems, elems, 8122 src); 8123 } 8124 kfree(elems); 8125 break; 8126 case WLAN_CATEGORY_PUBLIC: 8127 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8128 ies_len = skb->len - 8129 offsetof(struct ieee80211_mgmt, 8130 u.action.u.ext_chan_switch.variable); 8131 8132 if (ies_len < 0) 8133 break; 8134 8135 /* 8136 * extended CSA IE can't be overridden, no need for 8137 * BSSID 8138 */ 8139 elems = ieee802_11_parse_elems( 8140 mgmt->u.action.u.ext_chan_switch.variable, 8141 ies_len, true, NULL); 8142 8143 if (elems && !elems->parse_error) { 8144 enum ieee80211_csa_source src; 8145 8146 if (mgmt->u.action.category == 8147 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8148 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8149 else 8150 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8151 8152 /* for the handling code pretend it was an IE */ 8153 elems->ext_chansw_ie = 8154 &mgmt->u.action.u.ext_chan_switch.data; 8155 8156 ieee80211_sta_process_chanswitch(link, 8157 rx_status->mactime, 8158 rx_status->device_timestamp, 8159 elems, elems, 8160 src); 8161 } 8162 8163 kfree(elems); 8164 break; 8165 } 8166 break; 8167 } 8168 } 8169 8170 static void ieee80211_sta_timer(struct timer_list *t) 8171 { 8172 struct ieee80211_sub_if_data *sdata = 8173 timer_container_of(sdata, t, u.mgd.timer); 8174 8175 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8176 } 8177 8178 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8179 u8 reason, bool tx) 8180 { 8181 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8182 8183 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8184 tx, frame_buf); 8185 8186 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8187 reason, false); 8188 } 8189 8190 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8191 { 8192 struct ieee80211_local *local = sdata->local; 8193 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8194 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8195 u32 tx_flags = 0; 8196 u16 trans = 1; 8197 u16 status = 0; 8198 struct ieee80211_prep_tx_info info = { 8199 .subtype = IEEE80211_STYPE_AUTH, 8200 }; 8201 8202 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8203 8204 if (WARN_ON_ONCE(!auth_data)) 8205 return -EINVAL; 8206 8207 auth_data->tries++; 8208 8209 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8210 sdata_info(sdata, "authentication with %pM timed out\n", 8211 auth_data->ap_addr); 8212 8213 /* 8214 * Most likely AP is not in the range so remove the 8215 * bss struct for that AP. 8216 */ 8217 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8218 8219 return -ETIMEDOUT; 8220 } 8221 8222 if (auth_data->algorithm == WLAN_AUTH_SAE) 8223 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8224 8225 info.link_id = auth_data->link_id; 8226 drv_mgd_prepare_tx(local, sdata, &info); 8227 8228 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8229 auth_data->ap_addr, auth_data->tries, 8230 IEEE80211_AUTH_MAX_TRIES); 8231 8232 auth_data->expected_transaction = 2; 8233 8234 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8235 trans = auth_data->sae_trans; 8236 status = auth_data->sae_status; 8237 auth_data->expected_transaction = trans; 8238 } 8239 8240 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8241 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8242 IEEE80211_TX_INTFL_MLME_CONN_TX; 8243 8244 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8245 auth_data->data, auth_data->data_len, 8246 auth_data->ap_addr, auth_data->ap_addr, 8247 NULL, 0, 0, tx_flags); 8248 8249 if (tx_flags == 0) { 8250 if (auth_data->algorithm == WLAN_AUTH_SAE) 8251 auth_data->timeout = jiffies + 8252 IEEE80211_AUTH_TIMEOUT_SAE; 8253 else 8254 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8255 } else { 8256 auth_data->timeout = 8257 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8258 } 8259 8260 auth_data->timeout_started = true; 8261 run_again(sdata, auth_data->timeout); 8262 8263 return 0; 8264 } 8265 8266 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8267 { 8268 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8269 struct ieee80211_local *local = sdata->local; 8270 int ret; 8271 8272 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8273 8274 assoc_data->tries++; 8275 assoc_data->comeback = false; 8276 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8277 sdata_info(sdata, "association with %pM timed out\n", 8278 assoc_data->ap_addr); 8279 8280 /* 8281 * Most likely AP is not in the range so remove the 8282 * bss struct for that AP. 8283 */ 8284 cfg80211_unlink_bss(local->hw.wiphy, 8285 assoc_data->link[assoc_data->assoc_link_id].bss); 8286 8287 return -ETIMEDOUT; 8288 } 8289 8290 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8291 assoc_data->ap_addr, assoc_data->tries, 8292 IEEE80211_ASSOC_MAX_TRIES); 8293 ret = ieee80211_send_assoc(sdata); 8294 if (ret) 8295 return ret; 8296 8297 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8298 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8299 assoc_data->timeout_started = true; 8300 run_again(sdata, assoc_data->timeout); 8301 } else { 8302 assoc_data->timeout = 8303 round_jiffies_up(jiffies + 8304 IEEE80211_ASSOC_TIMEOUT_LONG); 8305 assoc_data->timeout_started = true; 8306 run_again(sdata, assoc_data->timeout); 8307 } 8308 8309 return 0; 8310 } 8311 8312 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8313 __le16 fc, bool acked) 8314 { 8315 struct ieee80211_local *local = sdata->local; 8316 8317 sdata->u.mgd.status_fc = fc; 8318 sdata->u.mgd.status_acked = acked; 8319 sdata->u.mgd.status_received = true; 8320 8321 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8322 } 8323 8324 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8325 { 8326 struct ieee80211_local *local = sdata->local; 8327 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8328 8329 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8330 8331 if (ifmgd->status_received) { 8332 __le16 fc = ifmgd->status_fc; 8333 bool status_acked = ifmgd->status_acked; 8334 8335 ifmgd->status_received = false; 8336 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8337 if (status_acked) { 8338 if (ifmgd->auth_data->algorithm == 8339 WLAN_AUTH_SAE) 8340 ifmgd->auth_data->timeout = 8341 jiffies + 8342 IEEE80211_AUTH_TIMEOUT_SAE; 8343 else 8344 ifmgd->auth_data->timeout = 8345 jiffies + 8346 IEEE80211_AUTH_TIMEOUT_SHORT; 8347 run_again(sdata, ifmgd->auth_data->timeout); 8348 } else { 8349 ifmgd->auth_data->timeout = jiffies - 1; 8350 } 8351 ifmgd->auth_data->timeout_started = true; 8352 } else if (ifmgd->assoc_data && 8353 !ifmgd->assoc_data->comeback && 8354 (ieee80211_is_assoc_req(fc) || 8355 ieee80211_is_reassoc_req(fc))) { 8356 /* 8357 * Update association timeout based on the TX status 8358 * for the (Re)Association Request frame. Skip this if 8359 * we have already processed a (Re)Association Response 8360 * frame that indicated need for association comeback 8361 * at a specific time in the future. This could happen 8362 * if the TX status information is delayed enough for 8363 * the response to be received and processed first. 8364 */ 8365 if (status_acked) { 8366 ifmgd->assoc_data->timeout = 8367 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8368 run_again(sdata, ifmgd->assoc_data->timeout); 8369 } else { 8370 ifmgd->assoc_data->timeout = jiffies - 1; 8371 } 8372 ifmgd->assoc_data->timeout_started = true; 8373 } 8374 } 8375 8376 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8377 time_after(jiffies, ifmgd->auth_data->timeout)) { 8378 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8379 /* 8380 * ok ... we waited for assoc or continuation but 8381 * userspace didn't do it, so kill the auth data 8382 */ 8383 ieee80211_destroy_auth_data(sdata, false); 8384 } else if (ieee80211_auth(sdata)) { 8385 u8 ap_addr[ETH_ALEN]; 8386 struct ieee80211_event event = { 8387 .type = MLME_EVENT, 8388 .u.mlme.data = AUTH_EVENT, 8389 .u.mlme.status = MLME_TIMEOUT, 8390 }; 8391 8392 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8393 8394 ieee80211_destroy_auth_data(sdata, false); 8395 8396 cfg80211_auth_timeout(sdata->dev, ap_addr); 8397 drv_event_callback(sdata->local, sdata, &event); 8398 } 8399 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8400 run_again(sdata, ifmgd->auth_data->timeout); 8401 8402 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8403 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8404 if ((ifmgd->assoc_data->need_beacon && 8405 !sdata->deflink.u.mgd.have_beacon) || 8406 ieee80211_do_assoc(sdata)) { 8407 struct ieee80211_event event = { 8408 .type = MLME_EVENT, 8409 .u.mlme.data = ASSOC_EVENT, 8410 .u.mlme.status = MLME_TIMEOUT, 8411 }; 8412 8413 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8414 drv_event_callback(sdata->local, sdata, &event); 8415 } 8416 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8417 run_again(sdata, ifmgd->assoc_data->timeout); 8418 8419 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8420 ifmgd->associated) { 8421 u8 *bssid = sdata->deflink.u.mgd.bssid; 8422 int max_tries; 8423 8424 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8425 max_tries = max_nullfunc_tries; 8426 else 8427 max_tries = max_probe_tries; 8428 8429 /* ACK received for nullfunc probing frame */ 8430 if (!ifmgd->probe_send_count) 8431 ieee80211_reset_ap_probe(sdata); 8432 else if (ifmgd->nullfunc_failed) { 8433 if (ifmgd->probe_send_count < max_tries) { 8434 mlme_dbg(sdata, 8435 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8436 bssid, ifmgd->probe_send_count, 8437 max_tries); 8438 ieee80211_mgd_probe_ap_send(sdata); 8439 } else { 8440 mlme_dbg(sdata, 8441 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8442 bssid); 8443 ieee80211_sta_connection_lost(sdata, 8444 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8445 false); 8446 } 8447 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8448 run_again(sdata, ifmgd->probe_timeout); 8449 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8450 mlme_dbg(sdata, 8451 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8452 bssid, probe_wait_ms); 8453 ieee80211_sta_connection_lost(sdata, 8454 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8455 } else if (ifmgd->probe_send_count < max_tries) { 8456 mlme_dbg(sdata, 8457 "No probe response from AP %pM after %dms, try %d/%i\n", 8458 bssid, probe_wait_ms, 8459 ifmgd->probe_send_count, max_tries); 8460 ieee80211_mgd_probe_ap_send(sdata); 8461 } else { 8462 /* 8463 * We actually lost the connection ... or did we? 8464 * Let's make sure! 8465 */ 8466 mlme_dbg(sdata, 8467 "No probe response from AP %pM after %dms, disconnecting.\n", 8468 bssid, probe_wait_ms); 8469 8470 ieee80211_sta_connection_lost(sdata, 8471 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8472 } 8473 } 8474 } 8475 8476 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8477 { 8478 struct ieee80211_sub_if_data *sdata = 8479 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 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 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8489 return; 8490 8491 sdata->u.mgd.connection_loss = false; 8492 wiphy_work_queue(sdata->local->hw.wiphy, 8493 &sdata->u.mgd.beacon_connection_loss_work); 8494 } 8495 8496 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8497 { 8498 struct ieee80211_sub_if_data *sdata = 8499 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8500 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8501 struct ieee80211_local *local = sdata->local; 8502 struct sta_info *sta; 8503 unsigned long timeout; 8504 8505 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8506 return; 8507 8508 if (sdata->vif.bss_conf.csa_active && 8509 !sdata->deflink.u.mgd.csa.waiting_bcn) 8510 return; 8511 8512 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8513 if (!sta) 8514 return; 8515 8516 timeout = sta->deflink.status_stats.last_ack; 8517 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8518 timeout = sta->deflink.rx_stats.last_rx; 8519 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8520 8521 /* If timeout is after now, then update timer to fire at 8522 * the later date, but do not actually probe at this time. 8523 */ 8524 if (time_is_after_jiffies(timeout)) { 8525 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8526 return; 8527 } 8528 8529 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8530 } 8531 8532 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8533 struct wiphy_work *work) 8534 { 8535 struct ieee80211_sub_if_data *sdata = 8536 container_of(work, struct ieee80211_sub_if_data, 8537 u.mgd.monitor_work); 8538 8539 ieee80211_mgd_probe_ap(sdata, false); 8540 } 8541 8542 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8543 { 8544 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8545 __ieee80211_stop_poll(sdata); 8546 8547 /* let's probe the connection once */ 8548 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8549 wiphy_work_queue(sdata->local->hw.wiphy, 8550 &sdata->u.mgd.monitor_work); 8551 } 8552 } 8553 8554 #ifdef CONFIG_PM 8555 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8556 { 8557 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8558 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8559 8560 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8561 8562 if (ifmgd->auth_data || ifmgd->assoc_data) { 8563 const u8 *ap_addr = ifmgd->auth_data ? 8564 ifmgd->auth_data->ap_addr : 8565 ifmgd->assoc_data->ap_addr; 8566 8567 /* 8568 * If we are trying to authenticate / associate while suspending, 8569 * cfg80211 won't know and won't actually abort those attempts, 8570 * thus we need to do that ourselves. 8571 */ 8572 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8573 IEEE80211_STYPE_DEAUTH, 8574 WLAN_REASON_DEAUTH_LEAVING, 8575 false, frame_buf); 8576 if (ifmgd->assoc_data) 8577 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8578 if (ifmgd->auth_data) 8579 ieee80211_destroy_auth_data(sdata, false); 8580 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8581 IEEE80211_DEAUTH_FRAME_LEN, 8582 false); 8583 } 8584 8585 /* This is a bit of a hack - we should find a better and more generic 8586 * solution to this. Normally when suspending, cfg80211 will in fact 8587 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8588 * auth (not so important) or assoc (this is the problem) process. 8589 * 8590 * As a consequence, it can happen that we are in the process of both 8591 * associating and suspending, and receive an association response 8592 * after cfg80211 has checked if it needs to disconnect, but before 8593 * we actually set the flag to drop incoming frames. This will then 8594 * cause the workqueue flush to process the association response in 8595 * the suspend, resulting in a successful association just before it 8596 * tries to remove the interface from the driver, which now though 8597 * has a channel context assigned ... this results in issues. 8598 * 8599 * To work around this (for now) simply deauth here again if we're 8600 * now connected. 8601 */ 8602 if (ifmgd->associated && !sdata->local->wowlan) { 8603 u8 bssid[ETH_ALEN]; 8604 struct cfg80211_deauth_request req = { 8605 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8606 .bssid = bssid, 8607 }; 8608 8609 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8610 ieee80211_mgd_deauth(sdata, &req); 8611 } 8612 } 8613 #endif 8614 8615 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8616 { 8617 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8618 8619 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8620 8621 if (!ifmgd->associated) 8622 return; 8623 8624 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8625 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8626 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8627 ieee80211_sta_connection_lost(sdata, 8628 WLAN_REASON_UNSPECIFIED, 8629 true); 8630 return; 8631 } 8632 8633 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8634 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8635 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8636 ieee80211_sta_connection_lost(sdata, 8637 WLAN_REASON_UNSPECIFIED, 8638 true); 8639 return; 8640 } 8641 } 8642 8643 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8644 struct wiphy_work *work) 8645 { 8646 struct ieee80211_link_data *link = 8647 container_of(work, struct ieee80211_link_data, 8648 u.mgd.request_smps_work); 8649 8650 __ieee80211_request_smps_mgd(link->sdata, link, 8651 link->u.mgd.driver_smps_mode); 8652 } 8653 8654 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8655 struct wiphy_work *work) 8656 { 8657 struct ieee80211_sub_if_data *sdata = 8658 container_of(work, struct ieee80211_sub_if_data, 8659 u.mgd.reconf.wk.work); 8660 8661 if (!sdata->u.mgd.reconf.added_links && 8662 !sdata->u.mgd.reconf.removed_links) 8663 return; 8664 8665 sdata_info(sdata, 8666 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8667 sdata->u.mgd.reconf.added_links, 8668 sdata->u.mgd.reconf.removed_links); 8669 8670 __ieee80211_disconnect(sdata); 8671 } 8672 8673 /* interface setup */ 8674 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8675 { 8676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8677 8678 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8679 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8680 ieee80211_beacon_connection_loss_work); 8681 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8682 ieee80211_csa_connection_drop_work); 8683 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8684 ieee80211_tdls_peer_del_work); 8685 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8686 ieee80211_ml_reconf_work); 8687 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8688 ieee80211_ml_sta_reconf_timeout); 8689 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8690 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8691 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8692 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8693 ieee80211_sta_handle_tspec_ac_params_wk); 8694 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8695 ieee80211_tid_to_link_map_work); 8696 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8697 ieee80211_neg_ttlm_timeout_work); 8698 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8699 ieee80211_teardown_ttlm_work); 8700 8701 ifmgd->flags = 0; 8702 ifmgd->powersave = sdata->wdev.ps; 8703 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8704 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8705 /* Setup TDLS data */ 8706 spin_lock_init(&ifmgd->teardown_lock); 8707 ifmgd->teardown_skb = NULL; 8708 ifmgd->orig_teardown_skb = NULL; 8709 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8710 } 8711 8712 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8713 struct wiphy_work *work) 8714 { 8715 struct ieee80211_link_data *link = 8716 container_of(work, struct ieee80211_link_data, 8717 u.mgd.recalc_smps); 8718 8719 ieee80211_recalc_smps(link->sdata, link); 8720 } 8721 8722 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8723 { 8724 struct ieee80211_sub_if_data *sdata = link->sdata; 8725 struct ieee80211_local *local = sdata->local; 8726 unsigned int link_id = link->link_id; 8727 8728 link->u.mgd.p2p_noa_index = -1; 8729 link->conf->bssid = link->u.mgd.bssid; 8730 link->smps_mode = IEEE80211_SMPS_OFF; 8731 8732 wiphy_work_init(&link->u.mgd.request_smps_work, 8733 ieee80211_request_smps_mgd_work); 8734 wiphy_work_init(&link->u.mgd.recalc_smps, 8735 ieee80211_recalc_smps_work); 8736 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8737 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8738 else 8739 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8740 8741 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8742 ieee80211_csa_switch_work); 8743 8744 ieee80211_clear_tpe(&link->conf->tpe); 8745 8746 if (sdata->u.mgd.assoc_data) 8747 ether_addr_copy(link->conf->addr, 8748 sdata->u.mgd.assoc_data->link[link_id].addr); 8749 else if (sdata->u.mgd.reconf.add_links_data) 8750 ether_addr_copy(link->conf->addr, 8751 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8752 else if (!is_valid_ether_addr(link->conf->addr)) 8753 eth_random_addr(link->conf->addr); 8754 } 8755 8756 /* scan finished notification */ 8757 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8758 { 8759 struct ieee80211_sub_if_data *sdata; 8760 8761 /* Restart STA timers */ 8762 rcu_read_lock(); 8763 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8764 if (ieee80211_sdata_running(sdata)) 8765 ieee80211_restart_sta_timer(sdata); 8766 } 8767 rcu_read_unlock(); 8768 } 8769 8770 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8771 struct cfg80211_bss *cbss, s8 link_id, 8772 const u8 *ap_mld_addr, bool assoc, 8773 struct ieee80211_conn_settings *conn, 8774 bool override, 8775 unsigned long *userspace_selectors) 8776 { 8777 struct ieee80211_local *local = sdata->local; 8778 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8779 struct ieee80211_bss *bss = (void *)cbss->priv; 8780 struct sta_info *new_sta = NULL; 8781 struct ieee80211_link_data *link; 8782 bool have_sta = false; 8783 bool mlo; 8784 int err; 8785 u16 new_links; 8786 8787 if (link_id >= 0) { 8788 mlo = true; 8789 if (WARN_ON(!ap_mld_addr)) 8790 return -EINVAL; 8791 new_links = BIT(link_id); 8792 } else { 8793 if (WARN_ON(ap_mld_addr)) 8794 return -EINVAL; 8795 ap_mld_addr = cbss->bssid; 8796 new_links = 0; 8797 link_id = 0; 8798 mlo = false; 8799 } 8800 8801 if (assoc) { 8802 rcu_read_lock(); 8803 have_sta = sta_info_get(sdata, ap_mld_addr); 8804 rcu_read_unlock(); 8805 } 8806 8807 if (mlo && !have_sta && 8808 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8809 return -EINVAL; 8810 8811 err = ieee80211_vif_set_links(sdata, new_links, 0); 8812 if (err) 8813 return err; 8814 8815 link = sdata_dereference(sdata->link[link_id], sdata); 8816 if (WARN_ON(!link)) { 8817 err = -ENOLINK; 8818 goto out_err; 8819 } 8820 8821 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8822 err = -EINVAL; 8823 goto out_err; 8824 } 8825 8826 /* If a reconfig is happening, bail out */ 8827 if (local->in_reconfig) { 8828 err = -EBUSY; 8829 goto out_err; 8830 } 8831 8832 if (!have_sta) { 8833 if (mlo) 8834 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8835 link_id, cbss->bssid, 8836 GFP_KERNEL); 8837 else 8838 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8839 8840 if (!new_sta) { 8841 err = -ENOMEM; 8842 goto out_err; 8843 } 8844 8845 new_sta->sta.mlo = mlo; 8846 } 8847 8848 /* 8849 * Set up the information for the new channel before setting the 8850 * new channel. We can't - completely race-free - change the basic 8851 * rates bitmap and the channel (sband) that it refers to, but if 8852 * we set it up before we at least avoid calling into the driver's 8853 * bss_info_changed() method with invalid information (since we do 8854 * call that from changing the channel - only for IDLE and perhaps 8855 * some others, but ...). 8856 * 8857 * So to avoid that, just set up all the new information before the 8858 * channel, but tell the driver to apply it only afterwards, since 8859 * it might need the new channel for that. 8860 */ 8861 if (new_sta) { 8862 const struct cfg80211_bss_ies *ies; 8863 struct link_sta_info *link_sta; 8864 8865 rcu_read_lock(); 8866 link_sta = rcu_dereference(new_sta->link[link_id]); 8867 if (WARN_ON(!link_sta)) { 8868 rcu_read_unlock(); 8869 sta_info_free(local, new_sta); 8870 err = -EINVAL; 8871 goto out_err; 8872 } 8873 8874 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8875 link_sta, cbss); 8876 if (err) { 8877 rcu_read_unlock(); 8878 sta_info_free(local, new_sta); 8879 goto out_err; 8880 } 8881 8882 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8883 8884 /* set timing information */ 8885 link->conf->beacon_int = cbss->beacon_interval; 8886 ies = rcu_dereference(cbss->beacon_ies); 8887 if (ies) { 8888 link->conf->sync_tsf = ies->tsf; 8889 link->conf->sync_device_ts = 8890 bss->device_ts_beacon; 8891 8892 ieee80211_get_dtim(ies, 8893 &link->conf->sync_dtim_count, 8894 NULL); 8895 } else if (!ieee80211_hw_check(&sdata->local->hw, 8896 TIMING_BEACON_ONLY)) { 8897 ies = rcu_dereference(cbss->proberesp_ies); 8898 /* must be non-NULL since beacon IEs were NULL */ 8899 link->conf->sync_tsf = ies->tsf; 8900 link->conf->sync_device_ts = 8901 bss->device_ts_presp; 8902 link->conf->sync_dtim_count = 0; 8903 } else { 8904 link->conf->sync_tsf = 0; 8905 link->conf->sync_device_ts = 0; 8906 link->conf->sync_dtim_count = 0; 8907 } 8908 rcu_read_unlock(); 8909 } 8910 8911 if (new_sta || override) { 8912 /* 8913 * Only set this if we're also going to calculate the AP 8914 * settings etc., otherwise this was set before in a 8915 * previous call. Note override is set to %true in assoc 8916 * if the settings were changed. 8917 */ 8918 link->u.mgd.conn = *conn; 8919 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8920 mlo, &link->u.mgd.conn, 8921 userspace_selectors); 8922 if (err) { 8923 if (new_sta) 8924 sta_info_free(local, new_sta); 8925 goto out_err; 8926 } 8927 /* pass out for use in assoc */ 8928 *conn = link->u.mgd.conn; 8929 } 8930 8931 if (new_sta) { 8932 /* 8933 * tell driver about BSSID, basic rates and timing 8934 * this was set up above, before setting the channel 8935 */ 8936 ieee80211_link_info_change_notify(sdata, link, 8937 BSS_CHANGED_BSSID | 8938 BSS_CHANGED_BASIC_RATES | 8939 BSS_CHANGED_BEACON_INT); 8940 8941 if (assoc) 8942 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8943 8944 err = sta_info_insert(new_sta); 8945 new_sta = NULL; 8946 if (err) { 8947 sdata_info(sdata, 8948 "failed to insert STA entry for the AP (error %d)\n", 8949 err); 8950 goto out_release_chan; 8951 } 8952 } else 8953 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8954 8955 /* Cancel scan to ensure that nothing interferes with connection */ 8956 if (local->scanning) 8957 ieee80211_scan_cancel(local); 8958 8959 return 0; 8960 8961 out_release_chan: 8962 ieee80211_link_release_channel(link); 8963 out_err: 8964 ieee80211_vif_set_links(sdata, 0, 0); 8965 return err; 8966 } 8967 8968 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8969 const struct cfg80211_bss_ies *ies, 8970 u8 cur_channel, bool ignore_ecsa) 8971 { 8972 const struct element *csa_elem, *ecsa_elem; 8973 struct ieee80211_channel_sw_ie *csa = NULL; 8974 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8975 8976 if (!ies) 8977 return false; 8978 8979 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8980 ies->data, ies->len); 8981 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8982 csa = (void *)csa_elem->data; 8983 8984 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8985 ies->data, ies->len); 8986 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8987 ecsa = (void *)ecsa_elem->data; 8988 8989 if (csa && csa->count == 0) 8990 csa = NULL; 8991 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8992 csa = NULL; 8993 8994 if (ecsa && ecsa->count == 0) 8995 ecsa = NULL; 8996 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8997 ecsa = NULL; 8998 8999 if (ignore_ecsa && ecsa) { 9000 sdata_info(sdata, 9001 "Ignoring ECSA in probe response - was considered stuck!\n"); 9002 return csa; 9003 } 9004 9005 return csa || ecsa; 9006 } 9007 9008 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 9009 struct cfg80211_bss *bss) 9010 { 9011 u8 cur_channel; 9012 bool ret; 9013 9014 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 9015 9016 rcu_read_lock(); 9017 if (ieee80211_mgd_csa_present(sdata, 9018 rcu_dereference(bss->beacon_ies), 9019 cur_channel, false)) { 9020 ret = true; 9021 goto out; 9022 } 9023 9024 if (ieee80211_mgd_csa_present(sdata, 9025 rcu_dereference(bss->proberesp_ies), 9026 cur_channel, bss->proberesp_ecsa_stuck)) { 9027 ret = true; 9028 goto out; 9029 } 9030 9031 ret = false; 9032 out: 9033 rcu_read_unlock(); 9034 return ret; 9035 } 9036 9037 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9038 const u8 *supported_selectors, 9039 u8 supported_selectors_len) 9040 { 9041 if (supported_selectors) { 9042 for (int i = 0; i < supported_selectors_len; i++) { 9043 set_bit(supported_selectors[i], 9044 userspace_selectors); 9045 } 9046 } else { 9047 /* Assume SAE_H2E support for backward compatibility. */ 9048 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9049 userspace_selectors); 9050 } 9051 } 9052 9053 /* config hooks */ 9054 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9055 struct cfg80211_auth_request *req) 9056 { 9057 struct ieee80211_local *local = sdata->local; 9058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9059 struct ieee80211_mgd_auth_data *auth_data; 9060 struct ieee80211_conn_settings conn; 9061 struct ieee80211_link_data *link; 9062 struct ieee80211_supported_band *sband; 9063 struct ieee80211_bss *bss; 9064 u16 auth_alg; 9065 int err; 9066 bool cont_auth, wmm_used; 9067 9068 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9069 9070 /* prepare auth data structure */ 9071 9072 switch (req->auth_type) { 9073 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9074 auth_alg = WLAN_AUTH_OPEN; 9075 break; 9076 case NL80211_AUTHTYPE_SHARED_KEY: 9077 if (fips_enabled) 9078 return -EOPNOTSUPP; 9079 auth_alg = WLAN_AUTH_SHARED_KEY; 9080 break; 9081 case NL80211_AUTHTYPE_FT: 9082 auth_alg = WLAN_AUTH_FT; 9083 break; 9084 case NL80211_AUTHTYPE_NETWORK_EAP: 9085 auth_alg = WLAN_AUTH_LEAP; 9086 break; 9087 case NL80211_AUTHTYPE_SAE: 9088 auth_alg = WLAN_AUTH_SAE; 9089 break; 9090 case NL80211_AUTHTYPE_FILS_SK: 9091 auth_alg = WLAN_AUTH_FILS_SK; 9092 break; 9093 case NL80211_AUTHTYPE_FILS_SK_PFS: 9094 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9095 break; 9096 case NL80211_AUTHTYPE_FILS_PK: 9097 auth_alg = WLAN_AUTH_FILS_PK; 9098 break; 9099 default: 9100 return -EOPNOTSUPP; 9101 } 9102 9103 if (ifmgd->assoc_data) 9104 return -EBUSY; 9105 9106 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9107 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9108 return -EINVAL; 9109 } 9110 9111 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9112 req->ie_len, GFP_KERNEL); 9113 if (!auth_data) 9114 return -ENOMEM; 9115 9116 memcpy(auth_data->ap_addr, 9117 req->ap_mld_addr ?: req->bss->bssid, 9118 ETH_ALEN); 9119 auth_data->bss = req->bss; 9120 auth_data->link_id = req->link_id; 9121 9122 if (req->auth_data_len >= 4) { 9123 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9124 __le16 *pos = (__le16 *) req->auth_data; 9125 9126 auth_data->sae_trans = le16_to_cpu(pos[0]); 9127 auth_data->sae_status = le16_to_cpu(pos[1]); 9128 } 9129 memcpy(auth_data->data, req->auth_data + 4, 9130 req->auth_data_len - 4); 9131 auth_data->data_len += req->auth_data_len - 4; 9132 } 9133 9134 /* Check if continuing authentication or trying to authenticate with the 9135 * same BSS that we were in the process of authenticating with and avoid 9136 * removal and re-addition of the STA entry in 9137 * ieee80211_prep_connection(). 9138 */ 9139 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9140 ifmgd->auth_data->link_id == req->link_id; 9141 9142 if (req->ie && req->ie_len) { 9143 memcpy(&auth_data->data[auth_data->data_len], 9144 req->ie, req->ie_len); 9145 auth_data->data_len += req->ie_len; 9146 } 9147 9148 if (req->key && req->key_len) { 9149 auth_data->key_len = req->key_len; 9150 auth_data->key_idx = req->key_idx; 9151 memcpy(auth_data->key, req->key, req->key_len); 9152 } 9153 9154 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9155 req->supported_selectors, 9156 req->supported_selectors_len); 9157 9158 auth_data->algorithm = auth_alg; 9159 9160 /* try to authenticate/probe */ 9161 9162 if (ifmgd->auth_data) { 9163 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9164 auth_data->peer_confirmed = 9165 ifmgd->auth_data->peer_confirmed; 9166 } 9167 ieee80211_destroy_auth_data(sdata, cont_auth); 9168 } 9169 9170 /* prep auth_data so we don't go into idle on disassoc */ 9171 ifmgd->auth_data = auth_data; 9172 9173 /* If this is continuation of an ongoing SAE authentication exchange 9174 * (i.e., request to send SAE Confirm) and the peer has already 9175 * confirmed, mark authentication completed since we are about to send 9176 * out SAE Confirm. 9177 */ 9178 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9179 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9180 ieee80211_mark_sta_auth(sdata); 9181 9182 if (ifmgd->associated) { 9183 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9184 9185 sdata_info(sdata, 9186 "disconnect from AP %pM for new auth to %pM\n", 9187 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9188 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9189 WLAN_REASON_UNSPECIFIED, 9190 false, frame_buf); 9191 9192 ieee80211_report_disconnect(sdata, frame_buf, 9193 sizeof(frame_buf), true, 9194 WLAN_REASON_UNSPECIFIED, 9195 false); 9196 } 9197 9198 /* needed for transmitting the auth frame(s) properly */ 9199 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9200 9201 bss = (void *)req->bss->priv; 9202 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9203 9204 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9205 9206 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9207 &conn); 9208 9209 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9210 req->ap_mld_addr, cont_auth, 9211 &conn, false, 9212 auth_data->userspace_selectors); 9213 if (err) 9214 goto err_clear; 9215 9216 if (req->link_id >= 0) 9217 link = sdata_dereference(sdata->link[req->link_id], sdata); 9218 else 9219 link = &sdata->deflink; 9220 9221 if (WARN_ON(!link)) { 9222 err = -ENOLINK; 9223 goto err_clear; 9224 } 9225 9226 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9227 auth_data->ap_addr, link->conf->addr); 9228 9229 err = ieee80211_auth(sdata); 9230 if (err) { 9231 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9232 goto err_clear; 9233 } 9234 9235 /* hold our own reference */ 9236 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9237 return 0; 9238 9239 err_clear: 9240 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9241 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9242 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9243 BSS_CHANGED_BSSID); 9244 ieee80211_link_release_channel(&sdata->deflink); 9245 } 9246 ifmgd->auth_data = NULL; 9247 kfree(auth_data); 9248 return err; 9249 } 9250 9251 static void 9252 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9253 struct ieee80211_mgd_assoc_data *assoc_data, 9254 struct cfg80211_assoc_request *req, 9255 struct ieee80211_conn_settings *conn, 9256 unsigned int link_id) 9257 { 9258 struct ieee80211_local *local = sdata->local; 9259 const struct cfg80211_bss_ies *bss_ies; 9260 struct ieee80211_supported_band *sband; 9261 struct ieee80211_link_data *link; 9262 struct cfg80211_bss *cbss; 9263 struct ieee80211_bss *bss; 9264 9265 cbss = assoc_data->link[link_id].bss; 9266 if (WARN_ON(!cbss)) 9267 return; 9268 9269 bss = (void *)cbss->priv; 9270 9271 sband = local->hw.wiphy->bands[cbss->channel->band]; 9272 if (WARN_ON(!sband)) 9273 return; 9274 9275 link = sdata_dereference(sdata->link[link_id], sdata); 9276 if (WARN_ON(!link)) 9277 return; 9278 9279 /* for MLO connections assume advertising all rates is OK */ 9280 if (!req->ap_mld_addr) { 9281 assoc_data->supp_rates = bss->supp_rates; 9282 assoc_data->supp_rates_len = bss->supp_rates_len; 9283 } 9284 9285 /* copy and link elems for the STA profile */ 9286 if (req->links[link_id].elems_len) { 9287 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9288 req->links[link_id].elems_len); 9289 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9290 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9291 assoc_data->ie_pos += req->links[link_id].elems_len; 9292 } 9293 9294 link->u.mgd.beacon_crc_valid = false; 9295 link->u.mgd.dtim_period = 0; 9296 link->u.mgd.have_beacon = false; 9297 9298 /* override HT configuration only if the AP and we support it */ 9299 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9300 struct ieee80211_sta_ht_cap sta_ht_cap; 9301 9302 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9303 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9304 } 9305 9306 rcu_read_lock(); 9307 bss_ies = rcu_dereference(cbss->beacon_ies); 9308 if (bss_ies) { 9309 u8 dtim_count = 0; 9310 9311 ieee80211_get_dtim(bss_ies, &dtim_count, 9312 &link->u.mgd.dtim_period); 9313 9314 sdata->deflink.u.mgd.have_beacon = true; 9315 9316 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9317 link->conf->sync_tsf = bss_ies->tsf; 9318 link->conf->sync_device_ts = bss->device_ts_beacon; 9319 link->conf->sync_dtim_count = dtim_count; 9320 } 9321 } else { 9322 bss_ies = rcu_dereference(cbss->ies); 9323 } 9324 9325 if (bss_ies) { 9326 const struct element *elem; 9327 9328 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9329 bss_ies->data, bss_ies->len); 9330 if (elem && elem->datalen >= 3) 9331 link->conf->profile_periodicity = elem->data[2]; 9332 else 9333 link->conf->profile_periodicity = 0; 9334 9335 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9336 bss_ies->data, bss_ies->len); 9337 if (elem && elem->datalen >= 11 && 9338 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9339 link->conf->ema_ap = true; 9340 else 9341 link->conf->ema_ap = false; 9342 } 9343 rcu_read_unlock(); 9344 9345 if (bss->corrupt_data) { 9346 char *corrupt_type = "data"; 9347 9348 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9349 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9350 corrupt_type = "beacon and probe response"; 9351 else 9352 corrupt_type = "beacon"; 9353 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9354 corrupt_type = "probe response"; 9355 } 9356 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9357 cbss->bssid, corrupt_type); 9358 } 9359 9360 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9361 if (sdata->u.mgd.powersave) 9362 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9363 else 9364 link->smps_mode = IEEE80211_SMPS_OFF; 9365 } else { 9366 link->smps_mode = link->u.mgd.req_smps; 9367 } 9368 } 9369 9370 static int 9371 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9372 struct ieee80211_mgd_assoc_data *assoc_data, 9373 int link_id) 9374 { 9375 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9376 enum nl80211_band band = cbss->channel->band; 9377 struct ieee80211_supported_band *sband; 9378 const struct element *elem; 9379 int err; 9380 9381 /* neither HT nor VHT elements used on 6 GHz */ 9382 if (band == NL80211_BAND_6GHZ) 9383 return 0; 9384 9385 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9386 return 0; 9387 9388 rcu_read_lock(); 9389 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9390 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9391 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9392 cbss->bssid); 9393 err = -EINVAL; 9394 goto out_rcu; 9395 } 9396 assoc_data->link[link_id].ap_ht_param = 9397 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9398 rcu_read_unlock(); 9399 9400 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9401 return 0; 9402 9403 /* some drivers want to support VHT on 2.4 GHz even */ 9404 sband = sdata->local->hw.wiphy->bands[band]; 9405 if (!sband->vht_cap.vht_supported) 9406 return 0; 9407 9408 rcu_read_lock(); 9409 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9410 /* but even then accept it not being present on the AP */ 9411 if (!elem && band == NL80211_BAND_2GHZ) { 9412 err = 0; 9413 goto out_rcu; 9414 } 9415 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9416 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9417 cbss->bssid); 9418 err = -EINVAL; 9419 goto out_rcu; 9420 } 9421 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9422 sizeof(struct ieee80211_vht_cap)); 9423 rcu_read_unlock(); 9424 9425 return 0; 9426 out_rcu: 9427 rcu_read_unlock(); 9428 return err; 9429 } 9430 9431 static bool 9432 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9433 { 9434 const struct cfg80211_bss_ies *ies; 9435 struct cfg80211_bss *bss; 9436 const struct element *ml; 9437 9438 /* not an MLO connection if link_id < 0, so irrelevant */ 9439 if (req->link_id < 0) 9440 return false; 9441 9442 bss = req->links[req->link_id].bss; 9443 9444 guard(rcu)(); 9445 ies = rcu_dereference(bss->ies); 9446 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9447 ies->data, ies->len) { 9448 const struct ieee80211_multi_link_elem *mle; 9449 9450 if (!ieee80211_mle_type_ok(ml->data + 1, 9451 IEEE80211_ML_CONTROL_TYPE_BASIC, 9452 ml->datalen - 1)) 9453 continue; 9454 9455 mle = (void *)(ml->data + 1); 9456 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9457 return true; 9458 } 9459 9460 return false; 9461 9462 } 9463 9464 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9465 struct cfg80211_assoc_request *req) 9466 { 9467 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9468 struct ieee80211_local *local = sdata->local; 9469 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9470 struct ieee80211_mgd_assoc_data *assoc_data; 9471 const struct element *ssid_elem; 9472 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9473 struct ieee80211_link_data *link; 9474 struct cfg80211_bss *cbss; 9475 bool override, uapsd_supported; 9476 bool match_auth; 9477 int i, err; 9478 size_t size = sizeof(*assoc_data) + req->ie_len; 9479 9480 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9481 size += req->links[i].elems_len; 9482 9483 /* FIXME: no support for 4-addr MLO yet */ 9484 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9485 return -EOPNOTSUPP; 9486 9487 assoc_data = kzalloc(size, GFP_KERNEL); 9488 if (!assoc_data) 9489 return -ENOMEM; 9490 9491 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9492 9493 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9494 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9495 err = -EINVAL; 9496 goto err_free; 9497 } 9498 9499 rcu_read_lock(); 9500 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9501 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9502 rcu_read_unlock(); 9503 err = -EINVAL; 9504 goto err_free; 9505 } 9506 9507 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9508 assoc_data->ssid_len = ssid_elem->datalen; 9509 rcu_read_unlock(); 9510 9511 if (req->ap_mld_addr) 9512 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9513 else 9514 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9515 9516 /* 9517 * Many APs have broken parsing of the extended MLD capa/ops field, 9518 * dropping (re-)association request frames or replying with association 9519 * response with a failure status if it's present. 9520 * Set our value from the userspace request only in strict mode or if 9521 * the AP also had that field present. 9522 */ 9523 if (ieee80211_hw_check(&local->hw, STRICT) || 9524 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9525 assoc_data->ext_mld_capa_ops = 9526 cpu_to_le16(req->ext_mld_capa_ops); 9527 9528 if (ifmgd->associated) { 9529 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9530 9531 sdata_info(sdata, 9532 "disconnect from AP %pM for new assoc to %pM\n", 9533 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9534 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9535 WLAN_REASON_UNSPECIFIED, 9536 false, frame_buf); 9537 9538 ieee80211_report_disconnect(sdata, frame_buf, 9539 sizeof(frame_buf), true, 9540 WLAN_REASON_UNSPECIFIED, 9541 false); 9542 } 9543 9544 memset(sdata->u.mgd.userspace_selectors, 0, 9545 sizeof(sdata->u.mgd.userspace_selectors)); 9546 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9547 req->supported_selectors, 9548 req->supported_selectors_len); 9549 9550 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9551 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9552 sizeof(ifmgd->ht_capa_mask)); 9553 9554 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9555 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9556 sizeof(ifmgd->vht_capa_mask)); 9557 9558 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9559 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9560 sizeof(ifmgd->s1g_capa_mask)); 9561 9562 /* keep some setup (AP STA, channel, ...) if matching */ 9563 match_auth = ifmgd->auth_data && 9564 ether_addr_equal(ifmgd->auth_data->ap_addr, 9565 assoc_data->ap_addr) && 9566 ifmgd->auth_data->link_id == req->link_id; 9567 9568 if (req->ap_mld_addr) { 9569 uapsd_supported = true; 9570 9571 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9572 ASSOC_REQ_DISABLE_VHT | 9573 ASSOC_REQ_DISABLE_HE | 9574 ASSOC_REQ_DISABLE_EHT)) { 9575 err = -EINVAL; 9576 goto err_free; 9577 } 9578 9579 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9580 struct ieee80211_supported_band *sband; 9581 struct cfg80211_bss *link_cbss = req->links[i].bss; 9582 struct ieee80211_bss *bss; 9583 9584 if (!link_cbss) 9585 continue; 9586 9587 bss = (void *)link_cbss->priv; 9588 9589 if (!bss->wmm_used) { 9590 err = -EINVAL; 9591 req->links[i].error = err; 9592 goto err_free; 9593 } 9594 9595 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9596 err = -EINVAL; 9597 req->links[i].error = err; 9598 goto err_free; 9599 } 9600 9601 link = sdata_dereference(sdata->link[i], sdata); 9602 if (link) 9603 ether_addr_copy(assoc_data->link[i].addr, 9604 link->conf->addr); 9605 else 9606 eth_random_addr(assoc_data->link[i].addr); 9607 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9608 9609 if (match_auth && i == assoc_link_id && link) 9610 assoc_data->link[i].conn = link->u.mgd.conn; 9611 else 9612 assoc_data->link[i].conn = 9613 ieee80211_conn_settings_unlimited; 9614 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9615 req, true, i, 9616 &assoc_data->link[i].conn); 9617 assoc_data->link[i].bss = link_cbss; 9618 assoc_data->link[i].disabled = req->links[i].disabled; 9619 9620 if (!bss->uapsd_supported) 9621 uapsd_supported = false; 9622 9623 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9624 err = -EINVAL; 9625 req->links[i].error = err; 9626 goto err_free; 9627 } 9628 9629 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9630 assoc_data, i); 9631 if (err) { 9632 err = -EINVAL; 9633 req->links[i].error = err; 9634 goto err_free; 9635 } 9636 } 9637 9638 assoc_data->wmm = true; 9639 } else { 9640 struct ieee80211_supported_band *sband; 9641 struct ieee80211_bss *bss = (void *)cbss->priv; 9642 9643 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9644 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9645 9646 assoc_data->wmm = bss->wmm_used && 9647 (local->hw.queues >= IEEE80211_NUM_ACS); 9648 9649 if (cbss->channel->band == NL80211_BAND_6GHZ && 9650 req->flags & (ASSOC_REQ_DISABLE_HT | 9651 ASSOC_REQ_DISABLE_VHT | 9652 ASSOC_REQ_DISABLE_HE)) { 9653 err = -EINVAL; 9654 goto err_free; 9655 } 9656 9657 sband = local->hw.wiphy->bands[cbss->channel->band]; 9658 9659 assoc_data->link[0].bss = cbss; 9660 9661 if (match_auth) 9662 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9663 else 9664 assoc_data->link[0].conn = 9665 ieee80211_conn_settings_unlimited; 9666 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9667 assoc_data->wmm, 0, 9668 &assoc_data->link[0].conn); 9669 9670 uapsd_supported = bss->uapsd_supported; 9671 9672 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9673 if (err) 9674 goto err_free; 9675 } 9676 9677 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9678 9679 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9680 err = -EBUSY; 9681 goto err_free; 9682 } 9683 9684 if (ifmgd->assoc_data) { 9685 err = -EBUSY; 9686 goto err_free; 9687 } 9688 9689 /* Cleanup is delayed if auth_data matches */ 9690 if (ifmgd->auth_data && !match_auth) 9691 ieee80211_destroy_auth_data(sdata, false); 9692 9693 if (req->ie && req->ie_len) { 9694 memcpy(assoc_data->ie, req->ie, req->ie_len); 9695 assoc_data->ie_len = req->ie_len; 9696 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9697 } else { 9698 assoc_data->ie_pos = assoc_data->ie; 9699 } 9700 9701 if (req->fils_kek) { 9702 /* should already be checked in cfg80211 - so warn */ 9703 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9704 err = -EINVAL; 9705 goto err_free; 9706 } 9707 memcpy(assoc_data->fils_kek, req->fils_kek, 9708 req->fils_kek_len); 9709 assoc_data->fils_kek_len = req->fils_kek_len; 9710 } 9711 9712 if (req->fils_nonces) 9713 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9714 2 * FILS_NONCE_LEN); 9715 9716 /* default timeout */ 9717 assoc_data->timeout = jiffies; 9718 assoc_data->timeout_started = true; 9719 9720 assoc_data->assoc_link_id = assoc_link_id; 9721 9722 if (req->ap_mld_addr) { 9723 /* if there was no authentication, set up the link */ 9724 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9725 if (err) 9726 goto err_clear; 9727 } 9728 9729 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9730 if (WARN_ON(!link)) { 9731 err = -EINVAL; 9732 goto err_clear; 9733 } 9734 9735 override = link->u.mgd.conn.mode != 9736 assoc_data->link[assoc_link_id].conn.mode || 9737 link->u.mgd.conn.bw_limit != 9738 assoc_data->link[assoc_link_id].conn.bw_limit; 9739 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9740 9741 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9742 assoc_link_id); 9743 9744 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9745 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9746 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9747 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9748 9749 if (assoc_data->wmm && uapsd_supported && 9750 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9751 assoc_data->uapsd = true; 9752 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9753 } else { 9754 assoc_data->uapsd = false; 9755 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9756 } 9757 9758 if (req->prev_bssid) 9759 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9760 9761 if (req->use_mfp) { 9762 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9763 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9764 } else { 9765 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9766 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9767 } 9768 9769 if (req->flags & ASSOC_REQ_USE_RRM) 9770 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9771 else 9772 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9773 9774 if (req->crypto.control_port) 9775 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9776 else 9777 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9778 9779 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9780 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9781 sdata->control_port_over_nl80211 = 9782 req->crypto.control_port_over_nl80211; 9783 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9784 9785 /* kick off associate process */ 9786 ifmgd->assoc_data = assoc_data; 9787 9788 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9789 if (!assoc_data->link[i].bss) 9790 continue; 9791 if (i == assoc_data->assoc_link_id) 9792 continue; 9793 /* only calculate the mode, hence link == NULL */ 9794 err = ieee80211_prep_channel(sdata, NULL, i, 9795 assoc_data->link[i].bss, true, 9796 &assoc_data->link[i].conn, 9797 sdata->u.mgd.userspace_selectors); 9798 if (err) { 9799 req->links[i].error = err; 9800 goto err_clear; 9801 } 9802 } 9803 9804 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9805 vif_cfg->ssid_len = assoc_data->ssid_len; 9806 9807 /* needed for transmitting the assoc frames properly */ 9808 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9809 9810 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9811 req->ap_mld_addr, true, 9812 &assoc_data->link[assoc_link_id].conn, 9813 override, 9814 sdata->u.mgd.userspace_selectors); 9815 if (err) 9816 goto err_clear; 9817 9818 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9819 const struct cfg80211_bss_ies *beacon_ies; 9820 9821 rcu_read_lock(); 9822 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9823 if (!beacon_ies) { 9824 /* 9825 * Wait up to one beacon interval ... 9826 * should this be more if we miss one? 9827 */ 9828 sdata_info(sdata, "waiting for beacon from %pM\n", 9829 link->u.mgd.bssid); 9830 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9831 assoc_data->timeout_started = true; 9832 assoc_data->need_beacon = true; 9833 } 9834 rcu_read_unlock(); 9835 } 9836 9837 run_again(sdata, assoc_data->timeout); 9838 9839 /* We are associating, clean up auth_data */ 9840 if (ifmgd->auth_data) 9841 ieee80211_destroy_auth_data(sdata, true); 9842 9843 return 0; 9844 err_clear: 9845 if (!ifmgd->auth_data) { 9846 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9847 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9848 BSS_CHANGED_BSSID); 9849 } 9850 ifmgd->assoc_data = NULL; 9851 err_free: 9852 kfree(assoc_data); 9853 return err; 9854 } 9855 9856 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9857 struct cfg80211_deauth_request *req) 9858 { 9859 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9860 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9861 bool tx = !req->local_state_change; 9862 struct ieee80211_prep_tx_info info = { 9863 .subtype = IEEE80211_STYPE_DEAUTH, 9864 }; 9865 9866 if (ifmgd->auth_data && 9867 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9868 sdata_info(sdata, 9869 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9870 req->bssid, req->reason_code, 9871 ieee80211_get_reason_code_string(req->reason_code)); 9872 9873 info.link_id = ifmgd->auth_data->link_id; 9874 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9875 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9876 IEEE80211_STYPE_DEAUTH, 9877 req->reason_code, tx, 9878 frame_buf); 9879 ieee80211_destroy_auth_data(sdata, false); 9880 ieee80211_report_disconnect(sdata, frame_buf, 9881 sizeof(frame_buf), true, 9882 req->reason_code, false); 9883 drv_mgd_complete_tx(sdata->local, sdata, &info); 9884 return 0; 9885 } 9886 9887 if (ifmgd->assoc_data && 9888 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9889 sdata_info(sdata, 9890 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9891 req->bssid, req->reason_code, 9892 ieee80211_get_reason_code_string(req->reason_code)); 9893 9894 info.link_id = ifmgd->assoc_data->assoc_link_id; 9895 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9896 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9897 IEEE80211_STYPE_DEAUTH, 9898 req->reason_code, tx, 9899 frame_buf); 9900 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9901 ieee80211_report_disconnect(sdata, frame_buf, 9902 sizeof(frame_buf), true, 9903 req->reason_code, false); 9904 drv_mgd_complete_tx(sdata->local, sdata, &info); 9905 return 0; 9906 } 9907 9908 if (ifmgd->associated && 9909 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9910 sdata_info(sdata, 9911 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9912 req->bssid, req->reason_code, 9913 ieee80211_get_reason_code_string(req->reason_code)); 9914 9915 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9916 req->reason_code, tx, frame_buf); 9917 ieee80211_report_disconnect(sdata, frame_buf, 9918 sizeof(frame_buf), true, 9919 req->reason_code, false); 9920 return 0; 9921 } 9922 9923 return -ENOTCONN; 9924 } 9925 9926 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9927 struct cfg80211_disassoc_request *req) 9928 { 9929 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9930 9931 if (!sdata->u.mgd.associated || 9932 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9933 return -ENOTCONN; 9934 9935 sdata_info(sdata, 9936 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9937 req->ap_addr, req->reason_code, 9938 ieee80211_get_reason_code_string(req->reason_code)); 9939 9940 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9941 req->reason_code, !req->local_state_change, 9942 frame_buf); 9943 9944 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9945 req->reason_code, false); 9946 9947 return 0; 9948 } 9949 9950 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9951 { 9952 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9953 &link->u.mgd.request_smps_work); 9954 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9955 &link->u.mgd.recalc_smps); 9956 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9957 &link->u.mgd.csa.switch_work); 9958 } 9959 9960 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9961 { 9962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9963 9964 /* 9965 * Make sure some work items will not run after this, 9966 * they will not do anything but might not have been 9967 * cancelled when disconnecting. 9968 */ 9969 wiphy_work_cancel(sdata->local->hw.wiphy, 9970 &ifmgd->monitor_work); 9971 wiphy_work_cancel(sdata->local->hw.wiphy, 9972 &ifmgd->beacon_connection_loss_work); 9973 wiphy_work_cancel(sdata->local->hw.wiphy, 9974 &ifmgd->csa_connection_drop_work); 9975 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9976 &ifmgd->tdls_peer_del_work); 9977 9978 if (ifmgd->assoc_data) 9979 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9980 if (ifmgd->auth_data) 9981 ieee80211_destroy_auth_data(sdata, false); 9982 spin_lock_bh(&ifmgd->teardown_lock); 9983 if (ifmgd->teardown_skb) { 9984 kfree_skb(ifmgd->teardown_skb); 9985 ifmgd->teardown_skb = NULL; 9986 ifmgd->orig_teardown_skb = NULL; 9987 } 9988 kfree(ifmgd->assoc_req_ies); 9989 ifmgd->assoc_req_ies = NULL; 9990 ifmgd->assoc_req_ies_len = 0; 9991 spin_unlock_bh(&ifmgd->teardown_lock); 9992 timer_delete_sync(&ifmgd->timer); 9993 } 9994 9995 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9996 enum nl80211_cqm_rssi_threshold_event rssi_event, 9997 s32 rssi_level, 9998 gfp_t gfp) 9999 { 10000 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10001 10002 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 10003 10004 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 10005 } 10006 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 10007 10008 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 10009 { 10010 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10011 10012 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 10013 10014 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 10015 } 10016 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 10017 10018 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 10019 int rssi_min_thold, 10020 int rssi_max_thold) 10021 { 10022 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 10023 10024 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 10025 return; 10026 10027 /* 10028 * Scale up threshold values before storing it, as the RSSI averaging 10029 * algorithm uses a scaled up value as well. Change this scaling 10030 * factor if the RSSI averaging algorithm changes. 10031 */ 10032 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10033 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10034 } 10035 10036 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10037 int rssi_min_thold, 10038 int rssi_max_thold) 10039 { 10040 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10041 10042 WARN_ON(rssi_min_thold == rssi_max_thold || 10043 rssi_min_thold > rssi_max_thold); 10044 10045 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10046 rssi_max_thold); 10047 } 10048 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10049 10050 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10051 { 10052 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10053 10054 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10055 } 10056 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10057 10058 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10059 struct ieee80211_mgmt *mgmt, size_t len) 10060 { 10061 struct ieee80211_local *local = sdata->local; 10062 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10063 struct ieee80211_mgd_assoc_data *add_links_data = 10064 ifmgd->reconf.add_links_data; 10065 struct sta_info *sta; 10066 struct cfg80211_mlo_reconf_done_data done_data = {}; 10067 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10068 sdata->u.mgd.reconf.removed_links; 10069 u16 link_mask, valid_links; 10070 unsigned int link_id; 10071 size_t orig_len = len; 10072 u8 i, group_key_data_len; 10073 u8 *pos; 10074 10075 if (!ieee80211_vif_is_mld(&sdata->vif) || 10076 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10077 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10078 sdata->u.mgd.reconf.dialog_token || 10079 !sta_changed_links) 10080 return; 10081 10082 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10083 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10084 10085 /* each status duple is 3 octets */ 10086 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10087 sdata_info(sdata, 10088 "mlo: reconf: unexpected len=%zu, count=%u\n", 10089 len, mgmt->u.action.u.ml_reconf_resp.count); 10090 goto disconnect; 10091 } 10092 10093 link_mask = sta_changed_links; 10094 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10095 u16 status = get_unaligned_le16(pos + 1); 10096 10097 link_id = *pos; 10098 10099 if (!(link_mask & BIT(link_id))) { 10100 sdata_info(sdata, 10101 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10102 link_id, sta_changed_links); 10103 goto disconnect; 10104 } 10105 10106 /* clear the corresponding link, to detect the case that 10107 * the same link was included more than one time 10108 */ 10109 link_mask &= ~BIT(link_id); 10110 10111 /* Handle failure to remove links here. Failure to remove added 10112 * links will be done later in the flow. 10113 */ 10114 if (status != WLAN_STATUS_SUCCESS) { 10115 sdata_info(sdata, 10116 "mlo: reconf: failed on link=%u, status=%u\n", 10117 link_id, status); 10118 10119 /* The AP MLD failed to remove a link that was already 10120 * removed locally. As this is not expected behavior, 10121 * disconnect 10122 */ 10123 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10124 goto disconnect; 10125 10126 /* The AP MLD failed to add a link. Remove it from the 10127 * added links. 10128 */ 10129 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10130 } 10131 10132 pos += 3; 10133 len -= 3; 10134 } 10135 10136 if (link_mask) { 10137 sdata_info(sdata, 10138 "mlo: reconf: no response for links=0x%x\n", 10139 link_mask); 10140 goto disconnect; 10141 } 10142 10143 if (!sdata->u.mgd.reconf.added_links) 10144 goto out; 10145 10146 if (len < 1 || len < 1 + *pos) { 10147 sdata_info(sdata, 10148 "mlo: reconf: invalid group key data length"); 10149 goto disconnect; 10150 } 10151 10152 /* The Group Key Data field must be present when links are added. This 10153 * field should be processed by userland. 10154 */ 10155 group_key_data_len = *pos++; 10156 10157 pos += group_key_data_len; 10158 len -= group_key_data_len + 1; 10159 10160 /* Process the information for the added links */ 10161 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10162 if (WARN_ON(!sta)) 10163 goto disconnect; 10164 10165 valid_links = sdata->vif.valid_links; 10166 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10167 if (!add_links_data->link[link_id].bss || 10168 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10169 continue; 10170 10171 valid_links |= BIT(link_id); 10172 if (ieee80211_sta_allocate_link(sta, link_id)) 10173 goto disconnect; 10174 } 10175 10176 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10177 link_mask = 0; 10178 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10179 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10180 struct ieee80211_link_data *link; 10181 struct link_sta_info *link_sta; 10182 u64 changed = 0; 10183 10184 if (!cbss) 10185 continue; 10186 10187 link = sdata_dereference(sdata->link[link_id], sdata); 10188 if (WARN_ON(!link)) 10189 goto disconnect; 10190 10191 link_info(link, 10192 "mlo: reconf: local address %pM, AP link address %pM\n", 10193 add_links_data->link[link_id].addr, 10194 add_links_data->link[link_id].bss->bssid); 10195 10196 link_sta = rcu_dereference_protected(sta->link[link_id], 10197 lockdep_is_held(&local->hw.wiphy->mtx)); 10198 if (WARN_ON(!link_sta)) 10199 goto disconnect; 10200 10201 if (!link->u.mgd.have_beacon) { 10202 const struct cfg80211_bss_ies *ies; 10203 10204 rcu_read_lock(); 10205 ies = rcu_dereference(cbss->beacon_ies); 10206 if (ies) 10207 link->u.mgd.have_beacon = true; 10208 else 10209 ies = rcu_dereference(cbss->ies); 10210 ieee80211_get_dtim(ies, 10211 &link->conf->sync_dtim_count, 10212 &link->u.mgd.dtim_period); 10213 link->conf->beacon_int = cbss->beacon_interval; 10214 rcu_read_unlock(); 10215 } 10216 10217 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10218 10219 link->u.mgd.conn = add_links_data->link[link_id].conn; 10220 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10221 true, &link->u.mgd.conn, 10222 sdata->u.mgd.userspace_selectors)) { 10223 link_info(link, "mlo: reconf: prep_channel failed\n"); 10224 goto disconnect; 10225 } 10226 10227 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10228 add_links_data->link[link_id].bss)) 10229 goto disconnect; 10230 10231 if (!ieee80211_assoc_config_link(link, link_sta, 10232 add_links_data->link[link_id].bss, 10233 mgmt, pos, len, 10234 &changed)) 10235 goto disconnect; 10236 10237 /* The AP MLD indicated success for this link, but the station 10238 * profile status indicated otherwise. Since there is an 10239 * inconsistency in the ML reconfiguration response, disconnect 10240 */ 10241 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10242 goto disconnect; 10243 10244 ieee80211_sta_init_nss(link_sta); 10245 if (ieee80211_sta_activate_link(sta, link_id)) 10246 goto disconnect; 10247 10248 changed |= ieee80211_link_set_associated(link, cbss); 10249 ieee80211_link_info_change_notify(sdata, link, changed); 10250 10251 ieee80211_recalc_smps(sdata, link); 10252 link_mask |= BIT(link_id); 10253 } 10254 10255 sdata_info(sdata, 10256 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10257 valid_links, link_mask); 10258 10259 /* links might have changed due to rejected ones, set them again */ 10260 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10261 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10262 10263 ieee80211_recalc_ps(local); 10264 ieee80211_recalc_ps_vif(sdata); 10265 10266 done_data.buf = (const u8 *)mgmt; 10267 done_data.len = orig_len; 10268 done_data.added_links = link_mask; 10269 10270 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10271 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10272 done_data.links[link_id].addr = 10273 add_links_data->link[link_id].addr; 10274 } 10275 10276 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10277 kfree(sdata->u.mgd.reconf.add_links_data); 10278 sdata->u.mgd.reconf.add_links_data = NULL; 10279 out: 10280 ieee80211_ml_reconf_reset(sdata); 10281 return; 10282 10283 disconnect: 10284 __ieee80211_disconnect(sdata); 10285 } 10286 10287 static struct sk_buff * 10288 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10289 struct ieee80211_mgd_assoc_data *add_links_data, 10290 u16 removed_links, __le16 ext_mld_capa_ops) 10291 { 10292 struct ieee80211_local *local = sdata->local; 10293 struct ieee80211_mgmt *mgmt; 10294 struct ieee80211_multi_link_elem *ml_elem; 10295 struct ieee80211_mle_basic_common_info *common; 10296 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10297 struct sk_buff *skb; 10298 size_t size; 10299 unsigned int link_id; 10300 __le16 eml_capa = 0, mld_capa_ops = 0; 10301 struct ieee80211_tx_info *info; 10302 u8 common_size, var_common_size; 10303 u8 *ml_elem_len; 10304 u16 capab = 0; 10305 10306 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10307 10308 /* Consider the maximal length of the reconfiguration ML element */ 10309 size += sizeof(struct ieee80211_multi_link_elem); 10310 10311 /* The Basic ML element and the Reconfiguration ML element have the same 10312 * fixed common information fields in the context of ML reconfiguration 10313 * action frame. The AP MLD MAC address must always be present 10314 */ 10315 common_size = sizeof(*common); 10316 10317 /* when adding links, the MLD capabilities must be present */ 10318 var_common_size = 0; 10319 if (add_links_data) { 10320 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10321 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10322 ieee80211_vif_type_p2p(&sdata->vif)); 10323 10324 if (ift_ext_capa) { 10325 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10326 mld_capa_ops = 10327 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10328 } 10329 10330 /* MLD capabilities and operation */ 10331 var_common_size += 2; 10332 10333 /* EML capabilities */ 10334 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10335 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10336 var_common_size += 2; 10337 } 10338 10339 if (ext_mld_capa_ops) 10340 var_common_size += 2; 10341 10342 /* Add the common information length */ 10343 size += common_size + var_common_size; 10344 10345 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10346 struct cfg80211_bss *cbss; 10347 size_t elems_len; 10348 10349 if (removed_links & BIT(link_id)) { 10350 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10351 ETH_ALEN; 10352 continue; 10353 } 10354 10355 if (!add_links_data || !add_links_data->link[link_id].bss) 10356 continue; 10357 10358 elems_len = add_links_data->link[link_id].elems_len; 10359 cbss = add_links_data->link[link_id].bss; 10360 10361 /* should be the same across all BSSes */ 10362 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10363 capab |= WLAN_CAPABILITY_PRIVACY; 10364 10365 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10366 ETH_ALEN; 10367 10368 /* WMM */ 10369 size += 9; 10370 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10371 elems_len); 10372 } 10373 10374 skb = alloc_skb(size, GFP_KERNEL); 10375 if (!skb) 10376 return NULL; 10377 10378 skb_reserve(skb, local->hw.extra_tx_headroom); 10379 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10380 u.action.u.ml_reconf_req)); 10381 10382 /* Add the MAC header */ 10383 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10384 IEEE80211_STYPE_ACTION); 10385 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10386 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10387 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10388 10389 /* Add the action frame fixed fields */ 10390 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10391 mgmt->u.action.u.ml_reconf_req.action_code = 10392 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10393 10394 /* allocate a dialog token and store it */ 10395 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10396 mgmt->u.action.u.ml_reconf_req.dialog_token = 10397 sdata->u.mgd.reconf.dialog_token; 10398 10399 /* Add the ML reconfiguration element and the common information */ 10400 skb_put_u8(skb, WLAN_EID_EXTENSION); 10401 ml_elem_len = skb_put(skb, 1); 10402 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10403 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10404 ml_elem->control = 10405 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10406 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10407 common = skb_put(skb, common_size); 10408 common->len = common_size + var_common_size; 10409 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10410 10411 if (add_links_data) { 10412 if (eml_capa & 10413 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10414 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10415 ml_elem->control |= 10416 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10417 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10418 } 10419 10420 ml_elem->control |= 10421 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10422 10423 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10424 } 10425 10426 if (ext_mld_capa_ops) { 10427 ml_elem->control |= 10428 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10429 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10430 } 10431 10432 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10433 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10434 10435 /* Add the per station profile */ 10436 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10437 u8 *subelem_len = NULL; 10438 u16 ctrl; 10439 const u8 *addr; 10440 10441 /* Skip links that are not changing */ 10442 if (!(removed_links & BIT(link_id)) && 10443 (!add_links_data || !add_links_data->link[link_id].bss)) 10444 continue; 10445 10446 ctrl = link_id | 10447 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10448 10449 if (removed_links & BIT(link_id)) { 10450 struct ieee80211_bss_conf *conf = 10451 sdata_dereference(sdata->vif.link_conf[link_id], 10452 sdata); 10453 if (!conf) 10454 continue; 10455 10456 addr = conf->addr; 10457 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10458 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10459 } else { 10460 addr = add_links_data->link[link_id].addr; 10461 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10462 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10463 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10464 } 10465 10466 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10467 subelem_len = skb_put(skb, 1); 10468 10469 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10470 skb_put_u8(skb, 1 + ETH_ALEN); 10471 skb_put_data(skb, addr, ETH_ALEN); 10472 10473 if (!(removed_links & BIT(link_id))) { 10474 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10475 size_t extra_used; 10476 void *capab_pos; 10477 u8 qos_info; 10478 10479 capab_pos = skb_put(skb, 2); 10480 10481 extra_used = 10482 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10483 add_links_data->link[link_id].elems, 10484 add_links_data->link[link_id].elems_len, 10485 link_id, NULL, 10486 link_present_elems, 10487 add_links_data); 10488 10489 if (add_links_data->link[link_id].elems) 10490 skb_put_data(skb, 10491 add_links_data->link[link_id].elems + 10492 extra_used, 10493 add_links_data->link[link_id].elems_len - 10494 extra_used); 10495 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10496 qos_info = sdata->u.mgd.uapsd_queues; 10497 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10498 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10499 } else { 10500 qos_info = 0; 10501 } 10502 10503 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10504 put_unaligned_le16(capab, capab_pos); 10505 } 10506 10507 ieee80211_fragment_element(skb, subelem_len, 10508 IEEE80211_MLE_SUBELEM_FRAGMENT); 10509 } 10510 10511 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10512 10513 info = IEEE80211_SKB_CB(skb); 10514 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10515 10516 return skb; 10517 } 10518 10519 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10520 struct cfg80211_ml_reconf_req *req) 10521 { 10522 struct ieee80211_local *local = sdata->local; 10523 struct ieee80211_mgd_assoc_data *data = NULL; 10524 struct sta_info *sta; 10525 struct sk_buff *skb; 10526 u16 added_links, new_valid_links; 10527 int link_id, err; 10528 10529 if (!ieee80211_vif_is_mld(&sdata->vif) || 10530 !(sdata->vif.cfg.mld_capa_op & 10531 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10532 return -EINVAL; 10533 10534 /* No support for concurrent ML reconfiguration operation */ 10535 if (sdata->u.mgd.reconf.added_links || 10536 sdata->u.mgd.reconf.removed_links) 10537 return -EBUSY; 10538 10539 added_links = 0; 10540 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10541 if (!req->add_links[link_id].bss) 10542 continue; 10543 10544 added_links |= BIT(link_id); 10545 } 10546 10547 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10548 if (WARN_ON(!sta)) 10549 return -ENOLINK; 10550 10551 /* Adding links to the set of valid link is done only after a successful 10552 * ML reconfiguration frame exchange. Here prepare the data for the ML 10553 * reconfiguration frame construction and allocate the required 10554 * resources 10555 */ 10556 if (added_links) { 10557 bool uapsd_supported; 10558 10559 data = kzalloc(sizeof(*data), GFP_KERNEL); 10560 if (!data) 10561 return -ENOMEM; 10562 10563 data->assoc_link_id = -1; 10564 data->wmm = true; 10565 10566 uapsd_supported = true; 10567 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10568 link_id++) { 10569 struct ieee80211_supported_band *sband; 10570 struct cfg80211_bss *link_cbss = 10571 req->add_links[link_id].bss; 10572 struct ieee80211_bss *bss; 10573 10574 if (!link_cbss) 10575 continue; 10576 10577 bss = (void *)link_cbss->priv; 10578 10579 if (!bss->wmm_used) { 10580 err = -EINVAL; 10581 goto err_free; 10582 } 10583 10584 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10585 err = -EINVAL; 10586 goto err_free; 10587 } 10588 10589 eth_random_addr(data->link[link_id].addr); 10590 data->link[link_id].conn = 10591 ieee80211_conn_settings_unlimited; 10592 sband = 10593 local->hw.wiphy->bands[link_cbss->channel->band]; 10594 10595 ieee80211_determine_our_sta_mode(sdata, sband, 10596 NULL, true, link_id, 10597 &data->link[link_id].conn); 10598 10599 data->link[link_id].bss = link_cbss; 10600 data->link[link_id].disabled = 10601 req->add_links[link_id].disabled; 10602 data->link[link_id].elems = 10603 (u8 *)req->add_links[link_id].elems; 10604 data->link[link_id].elems_len = 10605 req->add_links[link_id].elems_len; 10606 10607 if (!bss->uapsd_supported) 10608 uapsd_supported = false; 10609 10610 if (data->link[link_id].conn.mode < 10611 IEEE80211_CONN_MODE_EHT) { 10612 err = -EINVAL; 10613 goto err_free; 10614 } 10615 10616 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10617 link_id); 10618 if (err) { 10619 err = -EINVAL; 10620 goto err_free; 10621 } 10622 } 10623 10624 /* Require U-APSD support if we enabled it */ 10625 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10626 !uapsd_supported) { 10627 err = -EINVAL; 10628 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10629 goto err_free; 10630 } 10631 10632 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10633 link_id++) { 10634 if (!data->link[link_id].bss) 10635 continue; 10636 10637 /* only used to verify the mode, nothing is allocated */ 10638 err = ieee80211_prep_channel(sdata, NULL, link_id, 10639 data->link[link_id].bss, 10640 true, 10641 &data->link[link_id].conn, 10642 sdata->u.mgd.userspace_selectors); 10643 if (err) 10644 goto err_free; 10645 } 10646 } 10647 10648 /* link removal is done before the ML reconfiguration frame exchange so 10649 * that these links will not be used between their removal by the AP MLD 10650 * and before the station got the ML reconfiguration response. Based on 10651 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10652 * link removal request. 10653 */ 10654 if (req->rem_links) { 10655 u16 new_active_links = 10656 sdata->vif.active_links & ~req->rem_links; 10657 10658 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10659 10660 /* Should not be left with no valid links to perform the 10661 * ML reconfiguration 10662 */ 10663 if (!new_valid_links || 10664 !(new_valid_links & ~sdata->vif.dormant_links)) { 10665 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10666 err = -EINVAL; 10667 goto err_free; 10668 } 10669 10670 if (new_active_links != sdata->vif.active_links) { 10671 if (!new_active_links) 10672 new_active_links = 10673 BIT(__ffs(new_valid_links & 10674 ~sdata->vif.dormant_links)); 10675 10676 err = ieee80211_set_active_links(&sdata->vif, 10677 new_active_links); 10678 if (err) { 10679 sdata_info(sdata, 10680 "mlo: reconf: failed set active links\n"); 10681 goto err_free; 10682 } 10683 } 10684 } 10685 10686 /* Build the SKB before the link removal as the construction of the 10687 * station info for removed links requires the local address. 10688 * Invalidate the removed links, so that the transmission of the ML 10689 * reconfiguration request frame would not be done using them, as the AP 10690 * is expected to send the ML reconfiguration response frame on the link 10691 * on which the request was received. 10692 */ 10693 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10694 cpu_to_le16(req->ext_mld_capa_ops)); 10695 if (!skb) { 10696 err = -ENOMEM; 10697 goto err_free; 10698 } 10699 10700 if (req->rem_links) { 10701 u16 new_dormant_links = 10702 sdata->vif.dormant_links & ~req->rem_links; 10703 10704 err = ieee80211_vif_set_links(sdata, new_valid_links, 10705 new_dormant_links); 10706 if (err) { 10707 sdata_info(sdata, 10708 "mlo: reconf: failed set valid links\n"); 10709 kfree_skb(skb); 10710 goto err_free; 10711 } 10712 10713 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10714 link_id++) { 10715 if (!(req->rem_links & BIT(link_id))) 10716 continue; 10717 10718 ieee80211_sta_remove_link(sta, link_id); 10719 } 10720 10721 /* notify the driver and upper layers */ 10722 ieee80211_vif_cfg_change_notify(sdata, 10723 BSS_CHANGED_MLD_VALID_LINKS); 10724 cfg80211_links_removed(sdata->dev, req->rem_links); 10725 } 10726 10727 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10728 added_links, req->rem_links); 10729 10730 ieee80211_tx_skb(sdata, skb); 10731 10732 sdata->u.mgd.reconf.added_links = added_links; 10733 sdata->u.mgd.reconf.add_links_data = data; 10734 sdata->u.mgd.reconf.removed_links = req->rem_links; 10735 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10736 &sdata->u.mgd.reconf.wk, 10737 IEEE80211_ASSOC_TIMEOUT_SHORT); 10738 return 0; 10739 10740 err_free: 10741 kfree(data); 10742 return err; 10743 } 10744 10745 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10746 { 10747 unsigned long valid_links = sdata->vif.valid_links; 10748 u8 link_id; 10749 10750 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10751 10752 if (!ieee80211_vif_is_mld(&sdata->vif)) 10753 return false; 10754 10755 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10756 struct ieee80211_bss_conf *bss_conf = 10757 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10758 10759 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10760 return false; 10761 } 10762 10763 return true; 10764 } 10765 10766 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10767 { 10768 struct ieee80211_local *local = sdata->local; 10769 struct ieee80211_mgmt *mgmt; 10770 struct sk_buff *skb; 10771 int frame_len = offsetofend(struct ieee80211_mgmt, 10772 u.action.u.epcs) + (enable ? 1 : 0); 10773 10774 if (!ieee80211_mgd_epcs_supp(sdata)) 10775 return -EINVAL; 10776 10777 if (sdata->u.mgd.epcs.enabled == enable && 10778 !sdata->u.mgd.epcs.dialog_token) 10779 return 0; 10780 10781 /* Do not allow enabling EPCS if the AP didn't respond yet. 10782 * However, allow disabling EPCS in such a case. 10783 */ 10784 if (sdata->u.mgd.epcs.dialog_token && enable) 10785 return -EALREADY; 10786 10787 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10788 if (!skb) 10789 return -ENOBUFS; 10790 10791 skb_reserve(skb, local->hw.extra_tx_headroom); 10792 mgmt = skb_put_zero(skb, frame_len); 10793 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10794 IEEE80211_STYPE_ACTION); 10795 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10796 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10797 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10798 10799 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10800 if (enable) { 10801 u8 *pos = mgmt->u.action.u.epcs.variable; 10802 10803 mgmt->u.action.u.epcs.action_code = 10804 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10805 10806 *pos = ++sdata->u.mgd.dialog_token_alloc; 10807 sdata->u.mgd.epcs.dialog_token = *pos; 10808 } else { 10809 mgmt->u.action.u.epcs.action_code = 10810 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10811 10812 ieee80211_epcs_teardown(sdata); 10813 ieee80211_epcs_changed(sdata, false); 10814 } 10815 10816 ieee80211_tx_skb(sdata, skb); 10817 return 0; 10818 } 10819 10820 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10821 struct ieee802_11_elems *elems) 10822 { 10823 const struct element *sub; 10824 size_t scratch_len = elems->ml_epcs_len; 10825 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10826 10827 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10828 10829 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10830 return; 10831 10832 if (WARN_ON(!scratch)) 10833 return; 10834 10835 /* Directly parse the sub elements as the common information doesn't 10836 * hold any useful information. 10837 */ 10838 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10839 elems->ml_epcs_len) { 10840 struct ieee802_11_elems *link_elems __free(kfree) = NULL; 10841 struct ieee80211_link_data *link; 10842 u8 *pos = (void *)sub->data; 10843 u16 control; 10844 ssize_t len; 10845 u8 link_id; 10846 10847 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10848 continue; 10849 10850 if (sub->datalen < sizeof(control)) 10851 break; 10852 10853 control = get_unaligned_le16(pos); 10854 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10855 10856 link = sdata_dereference(sdata->link[link_id], sdata); 10857 if (!link) 10858 continue; 10859 10860 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10861 elems->ml_epcs_len, 10862 scratch, scratch_len, 10863 IEEE80211_MLE_SUBELEM_FRAGMENT); 10864 if (len < (ssize_t)sizeof(control)) 10865 continue; 10866 10867 pos = scratch + sizeof(control); 10868 len -= sizeof(control); 10869 10870 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10871 if (!link_elems) 10872 continue; 10873 10874 if (ieee80211_sta_wmm_params(sdata->local, link, 10875 link_elems->wmm_param, 10876 link_elems->wmm_param_len, 10877 link_elems->mu_edca_param_set)) 10878 ieee80211_link_info_change_notify(sdata, link, 10879 BSS_CHANGED_QOS); 10880 } 10881 } 10882 10883 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10884 struct ieee80211_mgmt *mgmt, size_t len) 10885 { 10886 struct ieee802_11_elems *elems __free(kfree) = NULL; 10887 size_t ies_len; 10888 u16 status_code; 10889 u8 *pos, dialog_token; 10890 10891 if (!ieee80211_mgd_epcs_supp(sdata)) 10892 return; 10893 10894 /* Handle dialog token and status code */ 10895 pos = mgmt->u.action.u.epcs.variable; 10896 dialog_token = *pos; 10897 status_code = get_unaligned_le16(pos + 1); 10898 10899 /* An EPCS enable response with dialog token == 0 is an unsolicited 10900 * notification from the AP MLD. In such a case, EPCS should already be 10901 * enabled and status must be success 10902 */ 10903 if (!dialog_token && 10904 (!sdata->u.mgd.epcs.enabled || 10905 status_code != WLAN_STATUS_SUCCESS)) 10906 return; 10907 10908 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 10909 return; 10910 10911 sdata->u.mgd.epcs.dialog_token = 0; 10912 10913 if (status_code != WLAN_STATUS_SUCCESS) 10914 return; 10915 10916 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10917 ies_len = len - offsetof(struct ieee80211_mgmt, 10918 u.action.u.epcs.variable) - 10919 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10920 10921 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 10922 if (!elems) 10923 return; 10924 10925 ieee80211_ml_epcs(sdata, elems); 10926 ieee80211_epcs_changed(sdata, true); 10927 } 10928 10929 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 10930 struct ieee80211_mgmt *mgmt, size_t len) 10931 { 10932 if (!ieee80211_vif_is_mld(&sdata->vif) || 10933 !sdata->u.mgd.epcs.enabled) 10934 return; 10935 10936 ieee80211_epcs_teardown(sdata); 10937 ieee80211_epcs_changed(sdata, false); 10938 } 10939