1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2025 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 172 ignore_ht_channel_mismatch = false; 173 174 *chandef = (struct cfg80211_chan_def) { 175 .chan = channel, 176 .width = NL80211_CHAN_WIDTH_20_NOHT, 177 .center_freq1 = channel->center_freq, 178 .freq1_offset = channel->freq_offset, 179 }; 180 181 /* get special S1G case out of the way */ 182 if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 184 sdata_info(sdata, 185 "Missing S1G Operation Element? Trying operating == primary\n"); 186 chandef->width = ieee80211_s1g_channel_width(channel); 187 } 188 189 return IEEE80211_CONN_MODE_S1G; 190 } 191 192 /* get special 6 GHz case out of the way */ 193 if (sband->band == NL80211_BAND_6GHZ) { 194 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 195 196 /* this is an error */ 197 if (conn->mode < IEEE80211_CONN_MODE_HE) 198 return IEEE80211_CONN_MODE_LEGACY; 199 200 if (!elems->he_6ghz_capa || !elems->he_cap) { 201 sdata_info(sdata, 202 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 203 return IEEE80211_CONN_MODE_LEGACY; 204 } 205 206 if (!eht_oper || !elems->eht_cap) { 207 eht_oper = NULL; 208 mode = IEEE80211_CONN_MODE_HE; 209 } 210 211 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 212 eht_oper, chandef)) { 213 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 214 return IEEE80211_CONN_MODE_LEGACY; 215 } 216 217 return mode; 218 } 219 220 /* now we have the progression HT, VHT, ... */ 221 if (conn->mode < IEEE80211_CONN_MODE_HT) 222 return IEEE80211_CONN_MODE_LEGACY; 223 224 if (!ht_oper || !elems->ht_cap_elem) 225 return IEEE80211_CONN_MODE_LEGACY; 226 227 chandef->width = NL80211_CHAN_WIDTH_20; 228 229 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 230 channel->band); 231 /* check that channel matches the right operating channel */ 232 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 233 /* 234 * It's possible that some APs are confused here; 235 * Netgear WNDR3700 sometimes reports 4 higher than 236 * the actual channel in association responses, but 237 * since we look at probe response/beacon data here 238 * it should be OK. 239 */ 240 sdata_info(sdata, 241 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 242 channel->center_freq, ht_cfreq, 243 ht_oper->primary_chan, channel->band); 244 return IEEE80211_CONN_MODE_LEGACY; 245 } 246 247 ieee80211_chandef_ht_oper(ht_oper, chandef); 248 249 if (conn->mode < IEEE80211_CONN_MODE_VHT) 250 return IEEE80211_CONN_MODE_HT; 251 252 vht_chandef = *chandef; 253 254 /* 255 * having he_cap/he_oper parsed out implies we're at 256 * least operating as HE STA 257 */ 258 if (elems->he_cap && he_oper && 259 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 260 struct ieee80211_vht_operation he_oper_vht_cap; 261 262 /* 263 * Set only first 3 bytes (other 2 aren't used in 264 * ieee80211_chandef_vht_oper() anyway) 265 */ 266 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 267 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 268 269 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 270 &he_oper_vht_cap, ht_oper, 271 &vht_chandef)) { 272 sdata_info(sdata, 273 "HE AP VHT information is invalid, disabling HE\n"); 274 /* this will cause us to re-parse as VHT STA */ 275 return IEEE80211_CONN_MODE_VHT; 276 } 277 } else if (!vht_oper || !elems->vht_cap_elem) { 278 if (sband->band == NL80211_BAND_5GHZ) { 279 sdata_info(sdata, 280 "VHT information is missing, disabling VHT\n"); 281 return IEEE80211_CONN_MODE_HT; 282 } 283 no_vht = true; 284 } else if (sband->band == NL80211_BAND_2GHZ) { 285 no_vht = true; 286 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 287 vht_cap_info, 288 vht_oper, ht_oper, 289 &vht_chandef)) { 290 sdata_info(sdata, 291 "AP VHT information is invalid, disabling VHT\n"); 292 return IEEE80211_CONN_MODE_HT; 293 } 294 295 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 296 sdata_info(sdata, 297 "AP VHT information doesn't match HT, disabling VHT\n"); 298 return IEEE80211_CONN_MODE_HT; 299 } 300 301 *chandef = vht_chandef; 302 303 /* stick to current max mode if we or the AP don't have HE */ 304 if (conn->mode < IEEE80211_CONN_MODE_HE || 305 !elems->he_operation || !elems->he_cap) { 306 if (no_vht) 307 return IEEE80211_CONN_MODE_HT; 308 return IEEE80211_CONN_MODE_VHT; 309 } 310 311 /* stick to HE if we or the AP don't have EHT */ 312 if (conn->mode < IEEE80211_CONN_MODE_EHT || 313 !eht_oper || !elems->eht_cap) 314 return IEEE80211_CONN_MODE_HE; 315 316 /* 317 * handle the case that the EHT operation indicates that it holds EHT 318 * operation information (in case that the channel width differs from 319 * the channel width reported in HT/VHT/HE). 320 */ 321 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 322 struct cfg80211_chan_def eht_chandef = *chandef; 323 324 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 325 &eht_chandef); 326 327 eht_chandef.punctured = 328 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 329 330 if (!cfg80211_chandef_valid(&eht_chandef)) { 331 sdata_info(sdata, 332 "AP EHT information is invalid, disabling EHT\n"); 333 return IEEE80211_CONN_MODE_HE; 334 } 335 336 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 337 sdata_info(sdata, 338 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 339 return IEEE80211_CONN_MODE_HE; 340 } 341 342 *chandef = eht_chandef; 343 } 344 345 return IEEE80211_CONN_MODE_EHT; 346 } 347 348 static bool 349 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 350 struct ieee80211_supported_band *sband, 351 const struct ieee80211_ht_operation *ht_op) 352 { 353 struct ieee80211_sta_ht_cap sta_ht_cap; 354 int i; 355 356 if (sband->band == NL80211_BAND_6GHZ) 357 return true; 358 359 if (!ht_op) 360 return false; 361 362 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 363 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 364 365 /* 366 * P802.11REVme/D7.0 - 6.5.4.2.4 367 * ... 368 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 369 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 370 * in the HT Operation parameter that contains any unsupported MCSs, 371 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 372 * contain a ResultCode parameter that is not set to the value SUCCESS. 373 * ... 374 */ 375 376 /* Simply check that all basic rates are in the STA RX mask */ 377 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 378 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 379 ht_op->basic_set[i]) 380 return false; 381 } 382 383 return true; 384 } 385 386 static bool 387 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 388 int link_id, 389 struct ieee80211_supported_band *sband, 390 const struct ieee80211_vht_operation *vht_op) 391 { 392 struct ieee80211_sta_vht_cap sta_vht_cap; 393 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 394 int nss; 395 396 if (sband->band != NL80211_BAND_5GHZ) 397 return true; 398 399 if (!vht_op) 400 return false; 401 402 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 403 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 404 405 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 406 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 407 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 408 409 /* 410 * Many APs are incorrectly advertising an all-zero value here, 411 * which really means MCS 0-7 are required for 1-8 streams, but 412 * they don't really mean it that way. 413 * Some other APs are incorrectly advertising 3 spatial streams 414 * with MCS 0-7 are required, but don't really mean it that way 415 * and we'll connect only with HT, rather than even HE. 416 * As a result, unfortunately the VHT basic MCS/NSS set cannot 417 * be used at all, so check it only in strict mode. 418 */ 419 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 420 return true; 421 422 /* 423 * P802.11REVme/D7.0 - 6.5.4.2.4 424 * ... 425 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 426 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 427 * field in the VHT Operation parameter that contains any unsupported 428 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 429 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 430 * that is not set to the value SUCCESS. 431 * ... 432 */ 433 for (nss = 8; nss > 0; nss--) { 434 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 435 u8 sta_rx_val; 436 u8 sta_tx_val; 437 438 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 439 continue; 440 441 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 442 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 443 444 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 445 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 446 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 447 link_id_info(sdata, link_id, 448 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 449 nss, sta_rx_val, sta_tx_val, ap_op_val); 450 return false; 451 } 452 } 453 454 return true; 455 } 456 457 static bool 458 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 459 int link_id, 460 const struct ieee80211_he_cap_elem *he_cap, 461 const struct ieee80211_he_operation *he_op) 462 { 463 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 464 u16 mcs_80_map_tx, mcs_80_map_rx; 465 u16 ap_min_req_set; 466 int nss; 467 468 if (!he_cap) 469 return false; 470 471 /* mcs_nss is right after he_cap info */ 472 he_mcs_nss_supp = (void *)(he_cap + 1); 473 474 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 475 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 476 477 /* P802.11-REVme/D0.3 478 * 27.1.1 Introduction to the HE PHY 479 * ... 480 * An HE STA shall support the following features: 481 * ... 482 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 483 * supported channel widths for HE SU PPDUs 484 */ 485 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 486 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 487 link_id_info(sdata, link_id, 488 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 489 mcs_80_map_tx, mcs_80_map_rx); 490 return false; 491 } 492 493 if (!he_op) 494 return true; 495 496 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 497 498 /* 499 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 500 * zeroes, which is nonsense, and completely inconsistent with itself 501 * (it doesn't have 8 streams). Accept the settings in this case anyway. 502 */ 503 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 504 return true; 505 506 /* make sure the AP is consistent with itself 507 * 508 * P802.11-REVme/D0.3 509 * 26.17.1 Basic HE BSS operation 510 * 511 * A STA that is operating in an HE BSS shall be able to receive and 512 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 513 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 514 * MLME-START.request primitive and shall be able to receive at each of 515 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 516 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 517 * primitive 518 */ 519 for (nss = 8; nss > 0; nss--) { 520 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 521 u8 ap_rx_val; 522 u8 ap_tx_val; 523 524 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 525 continue; 526 527 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 528 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 529 530 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 531 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 532 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 533 link_id_info(sdata, link_id, 534 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 535 nss, ap_rx_val, ap_tx_val, ap_op_val); 536 return false; 537 } 538 } 539 540 return true; 541 } 542 543 static bool 544 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 545 struct ieee80211_supported_band *sband, 546 const struct ieee80211_he_operation *he_op) 547 { 548 const struct ieee80211_sta_he_cap *sta_he_cap = 549 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 550 u16 ap_min_req_set; 551 int i; 552 553 if (!sta_he_cap || !he_op) 554 return false; 555 556 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 557 558 /* 559 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 560 * zeroes, which is nonsense, and completely inconsistent with itself 561 * (it doesn't have 8 streams). Accept the settings in this case anyway. 562 */ 563 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 564 return true; 565 566 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 567 for (i = 0; i < 3; i++) { 568 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 569 &sta_he_cap->he_mcs_nss_supp; 570 u16 sta_mcs_map_rx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 572 u16 sta_mcs_map_tx = 573 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 574 u8 nss; 575 bool verified = true; 576 577 /* 578 * For each band there is a maximum of 8 spatial streams 579 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 580 * of 2 bits per NSS (1-8), with the values defined in enum 581 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 582 * capabilities aren't less than the AP's minimum requirements 583 * for this HE BSS per SS. 584 * It is enough to find one such band that meets the reqs. 585 */ 586 for (nss = 8; nss > 0; nss--) { 587 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 588 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 589 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 590 591 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 592 continue; 593 594 /* 595 * Make sure the HE AP doesn't require MCSs that aren't 596 * supported by the client as required by spec 597 * 598 * P802.11-REVme/D0.3 599 * 26.17.1 Basic HE BSS operation 600 * 601 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 602 * a BSS, unless it supports (i.e., is able to both transmit and 603 * receive using) all of the <HE-MCS, NSS> tuples in the basic 604 * HE-MCS and NSS set. 605 */ 606 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 607 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 608 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 609 verified = false; 610 break; 611 } 612 } 613 614 if (verified) 615 return true; 616 } 617 618 /* If here, STA doesn't meet AP's HE min requirements */ 619 return false; 620 } 621 622 static u8 623 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 624 const struct ieee80211_sta_eht_cap *sta_eht_cap, 625 unsigned int idx, int bw) 626 { 627 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 628 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 629 630 /* handle us being a 20 MHz-only EHT STA - with four values 631 * for MCS 0-7, 8-9, 10-11, 12-13. 632 */ 633 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 634 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 635 636 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 637 if (idx > 0) 638 idx--; 639 640 switch (bw) { 641 case 0: 642 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 643 case 1: 644 if (!(he_phy_cap0 & 645 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 646 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 647 return 0xff; /* pass check */ 648 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 649 case 2: 650 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 651 return 0xff; /* pass check */ 652 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 653 } 654 655 WARN_ON(1); 656 return 0; 657 } 658 659 static bool 660 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 661 struct ieee80211_supported_band *sband, 662 const struct ieee80211_eht_operation *eht_op) 663 { 664 const struct ieee80211_sta_he_cap *sta_he_cap = 665 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_sta_eht_cap *sta_eht_cap = 667 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 668 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 669 unsigned int i; 670 671 if (!sta_he_cap || !sta_eht_cap || !eht_op) 672 return false; 673 674 req = &eht_op->basic_mcs_nss; 675 676 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 677 u8 req_rx_nss, req_tx_nss; 678 unsigned int bw; 679 680 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_RX); 682 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 683 IEEE80211_EHT_MCS_NSS_TX); 684 685 for (bw = 0; bw < 3; bw++) { 686 u8 have, have_rx_nss, have_tx_nss; 687 688 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 689 sta_eht_cap, 690 i, bw); 691 have_rx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_RX); 693 have_tx_nss = u8_get_bits(have, 694 IEEE80211_EHT_MCS_NSS_TX); 695 696 if (req_rx_nss > have_rx_nss || 697 req_tx_nss > have_tx_nss) 698 return false; 699 } 700 } 701 702 return true; 703 } 704 705 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 706 const u8 *supp_rates, 707 unsigned int supp_rates_len, 708 const u8 *ext_supp_rates, 709 unsigned int ext_supp_rates_len, 710 u32 *rates, u32 *basic_rates, 711 unsigned long *unknown_rates_selectors, 712 bool *have_higher_than_11mbit, 713 int *min_rate, int *min_rate_index) 714 { 715 int i, j; 716 717 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 718 u8 supp_rate = i < supp_rates_len ? 719 supp_rates[i] : 720 ext_supp_rates[i - supp_rates_len]; 721 int rate = supp_rate & 0x7f; 722 bool is_basic = !!(supp_rate & 0x80); 723 724 if ((rate * 5) > 110 && have_higher_than_11mbit) 725 *have_higher_than_11mbit = true; 726 727 /* 728 * Skip membership selectors since they're not rates. 729 * 730 * Note: Even though the membership selector and the basic 731 * rate flag share the same bit, they are not exactly 732 * the same. 733 */ 734 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 735 if (unknown_rates_selectors) 736 set_bit(rate, unknown_rates_selectors); 737 continue; 738 } 739 740 for (j = 0; j < sband->n_bitrates; j++) { 741 struct ieee80211_rate *br; 742 int brate; 743 744 br = &sband->bitrates[j]; 745 746 brate = DIV_ROUND_UP(br->bitrate, 5); 747 if (brate == rate) { 748 if (rates) 749 *rates |= BIT(j); 750 if (is_basic && basic_rates) 751 *basic_rates |= BIT(j); 752 if (min_rate && (rate * 5) < *min_rate) { 753 *min_rate = rate * 5; 754 if (min_rate_index) 755 *min_rate_index = j; 756 } 757 break; 758 } 759 } 760 761 /* Handle an unknown entry as if it is an unknown selector */ 762 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 763 set_bit(rate, unknown_rates_selectors); 764 } 765 } 766 767 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 768 const struct cfg80211_chan_def *chandef, 769 u32 prohibited_flags) 770 { 771 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 772 chandef, prohibited_flags)) 773 return false; 774 775 if (chandef->punctured && 776 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 777 return false; 778 779 return true; 780 } 781 782 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 783 { 784 if (c->width == NL80211_CHAN_WIDTH_80P80) 785 return 4 + 4; 786 787 return cfg80211_chandef_get_width(c) / 20; 788 } 789 790 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 791 { 792 switch (c->width) { 793 case NL80211_CHAN_WIDTH_20: 794 case NL80211_CHAN_WIDTH_20_NOHT: 795 return 1; 796 case NL80211_CHAN_WIDTH_40: 797 return 2; 798 case NL80211_CHAN_WIDTH_80P80: 799 case NL80211_CHAN_WIDTH_80: 800 return 3; 801 case NL80211_CHAN_WIDTH_160: 802 return 4; 803 case NL80211_CHAN_WIDTH_320: 804 return 5; 805 default: 806 WARN_ON(1); 807 return 0; 808 } 809 } 810 811 VISIBLE_IF_MAC80211_KUNIT int 812 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 813 u8 n_partial_subchans) 814 { 815 int n = ieee80211_chandef_num_subchans(ap); 816 struct cfg80211_chan_def tmp = *ap; 817 int offset = 0; 818 819 /* 820 * Given a chandef (in this context, it's the AP's) and a number 821 * of subchannels that we want to look at ('n_partial_subchans'), 822 * calculate the offset in number of subchannels between the full 823 * and the subset with the desired width. 824 */ 825 826 /* same number of subchannels means no offset, obviously */ 827 if (n == n_partial_subchans) 828 return 0; 829 830 /* don't WARN - misconfigured APs could cause this if their N > width */ 831 if (n < n_partial_subchans) 832 return 0; 833 834 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 835 u32 prev = tmp.center_freq1; 836 837 ieee80211_chandef_downgrade(&tmp, NULL); 838 839 /* 840 * if center_freq moved up, half the original channels 841 * are gone now but were below, so increase offset 842 */ 843 if (prev < tmp.center_freq1) 844 offset += ieee80211_chandef_num_subchans(&tmp); 845 } 846 847 /* 848 * 80+80 with secondary 80 below primary - four subchannels for it 849 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 850 */ 851 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 852 ap->center_freq2 < ap->center_freq1) 853 offset += 4; 854 855 return offset; 856 } 857 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 858 859 VISIBLE_IF_MAC80211_KUNIT void 860 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 861 const struct cfg80211_chan_def *ap, 862 const struct cfg80211_chan_def *used) 863 { 864 u8 needed = ieee80211_chandef_num_subchans(used); 865 u8 have = ieee80211_chandef_num_subchans(ap); 866 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 867 u8 offset; 868 869 if (!psd->valid) 870 return; 871 872 /* if N is zero, all defaults were used, no point in rearranging */ 873 if (!psd->n) 874 goto out; 875 876 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 877 878 /* 879 * This assumes that 'N' is consistent with the HE channel, as 880 * it should be (otherwise the AP is broken). 881 * 882 * In psd->power we have values in the order 0..N, 0..K, where 883 * N+K should cover the entire channel per 'ap', but even if it 884 * doesn't then we've pre-filled 'unlimited' as defaults. 885 * 886 * But this is all the wrong order, we want to have them in the 887 * order of the 'used' channel. 888 * 889 * So for example, we could have a 320 MHz EHT AP, which has the 890 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 891 * seem to be considered for the TPE), as follows: 892 * 893 * EHT 320: | | | | | | | | | | | | | | | | | 894 * HE 80: | | | | | 895 * used 160: | | | | | | | | | 896 * 897 * N entries: |--|--|--|--| 898 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 899 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 900 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 901 * used chan: 0 1 2 3 4 5 6 7 902 * 903 * The idx in the power array ('power idx') is like this since it 904 * comes directly from the element's N and K entries in their 905 * element order, and those are this way for HE compatibility. 906 * 907 * Rearrange them as desired here, first by putting them into the 908 * 'full chan' order, and then selecting the necessary subset for 909 * the 'used chan'. 910 */ 911 912 /* first reorder according to AP channel */ 913 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 914 for (int i = 0; i < have; i++) { 915 if (i < offset) 916 tmp[i] = psd->power[i + psd->n]; 917 else if (i < offset + psd->n) 918 tmp[i] = psd->power[i - offset]; 919 else 920 tmp[i] = psd->power[i]; 921 } 922 923 /* 924 * and then select the subset for the used channel 925 * (set everything to defaults first in case a driver is confused) 926 */ 927 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 928 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 929 for (int i = 0; i < needed; i++) 930 psd->power[i] = tmp[offset + i]; 931 932 out: 933 /* limit, but don't lie if there are defaults in the data */ 934 if (needed < psd->count) 935 psd->count = needed; 936 } 937 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 938 939 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 940 const struct cfg80211_chan_def *ap, 941 const struct cfg80211_chan_def *used) 942 { 943 /* ignore this completely for narrow/invalid channels */ 944 if (!ieee80211_chandef_num_subchans(ap) || 945 !ieee80211_chandef_num_subchans(used)) { 946 ieee80211_clear_tpe(tpe); 947 return; 948 } 949 950 for (int i = 0; i < 2; i++) { 951 int needed_pwr_count; 952 953 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 954 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 955 956 /* limit this to the widths we actually need */ 957 needed_pwr_count = ieee80211_chandef_num_widths(used); 958 if (needed_pwr_count < tpe->max_local[i].count) 959 tpe->max_local[i].count = needed_pwr_count; 960 if (needed_pwr_count < tpe->max_reg_client[i].count) 961 tpe->max_reg_client[i].count = needed_pwr_count; 962 } 963 } 964 965 /* 966 * The AP part of the channel request is used to distinguish settings 967 * to the device used for wider bandwidth OFDMA. This is used in the 968 * channel context code to assign two channel contexts even if they're 969 * both for the same channel, if the AP bandwidths are incompatible. 970 * If not EHT (or driver override) then ap.chan == NULL indicates that 971 * there's no wider BW OFDMA used. 972 */ 973 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 974 struct ieee80211_chan_req *chanreq, 975 struct ieee80211_conn_settings *conn, 976 struct cfg80211_chan_def *ap_chandef) 977 { 978 chanreq->ap.chan = NULL; 979 980 if (conn->mode < IEEE80211_CONN_MODE_EHT) 981 return; 982 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 983 return; 984 985 chanreq->ap = *ap_chandef; 986 } 987 988 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 989 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 990 struct ieee80211_conn_settings *conn, 991 struct cfg80211_bss *cbss, int link_id, 992 struct ieee80211_chan_req *chanreq, 993 struct cfg80211_chan_def *ap_chandef, 994 unsigned long *userspace_selectors) 995 { 996 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 997 struct ieee80211_bss *bss = (void *)cbss->priv; 998 struct ieee80211_channel *channel = cbss->channel; 999 struct ieee80211_elems_parse_params parse_params = { 1000 .link_id = -1, 1001 .from_ap = true, 1002 .start = ies->data, 1003 .len = ies->len, 1004 }; 1005 struct ieee802_11_elems *elems; 1006 struct ieee80211_supported_band *sband; 1007 enum ieee80211_conn_mode ap_mode; 1008 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1009 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1010 int ret; 1011 1012 again: 1013 parse_params.mode = conn->mode; 1014 elems = ieee802_11_parse_elems_full(&parse_params); 1015 if (!elems) 1016 return ERR_PTR(-ENOMEM); 1017 1018 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1019 elems, false, conn, ap_chandef); 1020 1021 /* this should be impossible since parsing depends on our mode */ 1022 if (WARN_ON(ap_mode > conn->mode)) { 1023 ret = -EINVAL; 1024 goto free; 1025 } 1026 1027 if (conn->mode != ap_mode) { 1028 conn->mode = ap_mode; 1029 kfree(elems); 1030 goto again; 1031 } 1032 1033 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1034 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1035 1036 sband = sdata->local->hw.wiphy->bands[channel->band]; 1037 1038 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1039 elems->ext_supp_rates, elems->ext_supp_rates_len, 1040 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1041 NULL); 1042 1043 switch (channel->band) { 1044 case NL80211_BAND_S1GHZ: 1045 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1046 ret = -EINVAL; 1047 goto free; 1048 } 1049 return elems; 1050 case NL80211_BAND_6GHZ: 1051 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1052 link_id_info(sdata, link_id, 1053 "Rejecting non-HE 6/7 GHz connection"); 1054 ret = -EINVAL; 1055 goto free; 1056 } 1057 break; 1058 default: 1059 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1060 ret = -EINVAL; 1061 goto free; 1062 } 1063 } 1064 1065 switch (ap_mode) { 1066 case IEEE80211_CONN_MODE_S1G: 1067 WARN_ON(1); 1068 ret = -EINVAL; 1069 goto free; 1070 case IEEE80211_CONN_MODE_LEGACY: 1071 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1072 break; 1073 case IEEE80211_CONN_MODE_HT: 1074 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1075 conn->bw_limit, 1076 IEEE80211_CONN_BW_LIMIT_40); 1077 break; 1078 case IEEE80211_CONN_MODE_VHT: 1079 case IEEE80211_CONN_MODE_HE: 1080 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1081 conn->bw_limit, 1082 IEEE80211_CONN_BW_LIMIT_160); 1083 break; 1084 case IEEE80211_CONN_MODE_EHT: 1085 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1086 conn->bw_limit, 1087 IEEE80211_CONN_BW_LIMIT_320); 1088 break; 1089 } 1090 1091 chanreq->oper = *ap_chandef; 1092 1093 bitmap_copy(sta_selectors, userspace_selectors, 128); 1094 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1095 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1096 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1097 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1098 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1099 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1100 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1101 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1102 1103 /* 1104 * We do not support EPD or GLK so never add them. 1105 * SAE_H2E is handled through userspace_selectors. 1106 */ 1107 1108 /* Check if we support all required features */ 1109 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1110 link_id_info(sdata, link_id, 1111 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1112 ret = -EINVAL; 1113 goto free; 1114 } 1115 1116 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1117 1118 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1119 IEEE80211_CHAN_DISABLED)) { 1120 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1121 ret = -EINVAL; 1122 goto free; 1123 } 1124 1125 ieee80211_chanreq_downgrade(chanreq, conn); 1126 } 1127 1128 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1129 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1130 IEEE80211_CHAN_NO_HE)) { 1131 conn->mode = IEEE80211_CONN_MODE_VHT; 1132 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1133 conn->bw_limit, 1134 IEEE80211_CONN_BW_LIMIT_160); 1135 } 1136 1137 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1138 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1139 IEEE80211_CHAN_NO_EHT)) { 1140 conn->mode = IEEE80211_CONN_MODE_HE; 1141 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1142 conn->bw_limit, 1143 IEEE80211_CONN_BW_LIMIT_160); 1144 } 1145 1146 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1147 link_id_info(sdata, link_id, 1148 "regulatory prevented using AP config, downgraded\n"); 1149 1150 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1151 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1152 elems->ht_operation)) { 1153 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1154 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1155 link_id_info(sdata, link_id, 1156 "required MCSes not supported, disabling HT\n"); 1157 } 1158 1159 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1160 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1161 elems->vht_operation)) { 1162 conn->mode = IEEE80211_CONN_MODE_HT; 1163 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1164 conn->bw_limit, 1165 IEEE80211_CONN_BW_LIMIT_40); 1166 link_id_info(sdata, link_id, 1167 "required MCSes not supported, disabling VHT\n"); 1168 } 1169 1170 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1171 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1172 (void *)elems->he_cap, 1173 elems->he_operation) || 1174 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1175 elems->he_operation))) { 1176 conn->mode = IEEE80211_CONN_MODE_VHT; 1177 link_id_info(sdata, link_id, 1178 "required MCSes not supported, disabling HE\n"); 1179 } 1180 1181 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1182 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1183 elems->eht_operation)) { 1184 conn->mode = IEEE80211_CONN_MODE_HE; 1185 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1186 conn->bw_limit, 1187 IEEE80211_CONN_BW_LIMIT_160); 1188 link_id_info(sdata, link_id, 1189 "required MCSes not supported, disabling EHT\n"); 1190 } 1191 1192 /* the mode can only decrease, so this must terminate */ 1193 if (ap_mode != conn->mode) { 1194 kfree(elems); 1195 goto again; 1196 } 1197 1198 mlme_link_id_dbg(sdata, link_id, 1199 "connecting with %s mode, max bandwidth %d MHz\n", 1200 ieee80211_conn_mode_str(conn->mode), 1201 20 * (1 << conn->bw_limit)); 1202 1203 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1204 ret = -EINVAL; 1205 goto free; 1206 } 1207 1208 return elems; 1209 free: 1210 kfree(elems); 1211 return ERR_PTR(ret); 1212 } 1213 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1214 1215 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1216 struct ieee802_11_elems *elems, 1217 bool update, u64 *changed, 1218 const char *frame) 1219 { 1220 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1221 struct ieee80211_sub_if_data *sdata = link->sdata; 1222 struct ieee80211_chan_req chanreq = {}; 1223 struct cfg80211_chan_def ap_chandef; 1224 enum ieee80211_conn_mode ap_mode; 1225 u32 vht_cap_info = 0; 1226 u16 ht_opmode; 1227 int ret; 1228 1229 /* don't track any bandwidth changes in legacy/S1G modes */ 1230 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1231 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1232 return 0; 1233 1234 if (elems->vht_cap_elem) 1235 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1236 1237 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1238 elems, true, &link->u.mgd.conn, 1239 &ap_chandef); 1240 1241 if (ap_mode != link->u.mgd.conn.mode) { 1242 link_info(link, 1243 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1244 link->u.mgd.bssid, 1245 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1246 ieee80211_conn_mode_str(ap_mode), frame); 1247 return -EINVAL; 1248 } 1249 1250 chanreq.oper = ap_chandef; 1251 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1252 &ap_chandef); 1253 1254 /* 1255 * if HT operation mode changed store the new one - 1256 * this may be applicable even if channel is identical 1257 */ 1258 if (elems->ht_operation) { 1259 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1260 if (link->conf->ht_operation_mode != ht_opmode) { 1261 *changed |= BSS_CHANGED_HT; 1262 link->conf->ht_operation_mode = ht_opmode; 1263 } 1264 } 1265 1266 /* 1267 * Downgrade the new channel if we associated with restricted 1268 * bandwidth capabilities. For example, if we associated as a 1269 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1270 * or config reasons) then switching to a 40 MHz channel now 1271 * won't do us any good -- we couldn't use it with the AP. 1272 */ 1273 while (link->u.mgd.conn.bw_limit < 1274 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1275 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1276 1277 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1278 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1279 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1280 &chanreq.oper); 1281 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1282 link->conf->tpe = elems->tpe; 1283 *changed |= BSS_CHANGED_TPE; 1284 } 1285 } 1286 1287 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1288 return 0; 1289 1290 link_info(link, 1291 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1292 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1293 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1294 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1295 chanreq.oper.center_freq2); 1296 1297 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1298 sdata_info(sdata, 1299 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1300 link->u.mgd.bssid, frame); 1301 return -EINVAL; 1302 } 1303 1304 if (!update) { 1305 link->conf->chanreq = chanreq; 1306 return 0; 1307 } 1308 1309 /* 1310 * We're tracking the current AP here, so don't do any further checks 1311 * here. This keeps us from playing ping-pong with regulatory, without 1312 * it the following can happen (for example): 1313 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1314 * - AP advertises regdom US 1315 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1316 * - we detect an unsupported channel and disconnect 1317 * - disconnect causes CRDA to reload world regdomain and the game 1318 * starts anew. 1319 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1320 * 1321 * It seems possible that there are still scenarios with CSA or real 1322 * bandwidth changes where a this could happen, but those cases are 1323 * less common and wouldn't completely prevent using the AP. 1324 */ 1325 1326 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1327 if (ret) { 1328 sdata_info(sdata, 1329 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1330 link->u.mgd.bssid, frame); 1331 return ret; 1332 } 1333 1334 cfg80211_schedule_channels_check(&sdata->wdev); 1335 return 0; 1336 } 1337 1338 /* frame sending functions */ 1339 1340 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1341 struct sk_buff *skb, u8 ap_ht_param, 1342 struct ieee80211_supported_band *sband, 1343 struct ieee80211_channel *channel, 1344 enum ieee80211_smps_mode smps, 1345 const struct ieee80211_conn_settings *conn) 1346 { 1347 u8 *pos; 1348 u32 flags = channel->flags; 1349 u16 cap; 1350 struct ieee80211_sta_ht_cap ht_cap; 1351 1352 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1353 1354 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1355 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1356 1357 /* determine capability flags */ 1358 cap = ht_cap.cap; 1359 1360 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1361 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1362 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1363 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1364 cap &= ~IEEE80211_HT_CAP_SGI_40; 1365 } 1366 break; 1367 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1368 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1369 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1370 cap &= ~IEEE80211_HT_CAP_SGI_40; 1371 } 1372 break; 1373 } 1374 1375 /* 1376 * If 40 MHz was disabled associate as though we weren't 1377 * capable of 40 MHz -- some broken APs will never fall 1378 * back to trying to transmit in 20 MHz. 1379 */ 1380 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1381 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1382 cap &= ~IEEE80211_HT_CAP_SGI_40; 1383 } 1384 1385 /* set SM PS mode properly */ 1386 cap &= ~IEEE80211_HT_CAP_SM_PS; 1387 switch (smps) { 1388 case IEEE80211_SMPS_AUTOMATIC: 1389 case IEEE80211_SMPS_NUM_MODES: 1390 WARN_ON(1); 1391 fallthrough; 1392 case IEEE80211_SMPS_OFF: 1393 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1394 IEEE80211_HT_CAP_SM_PS_SHIFT; 1395 break; 1396 case IEEE80211_SMPS_STATIC: 1397 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1398 IEEE80211_HT_CAP_SM_PS_SHIFT; 1399 break; 1400 case IEEE80211_SMPS_DYNAMIC: 1401 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1402 IEEE80211_HT_CAP_SM_PS_SHIFT; 1403 break; 1404 } 1405 1406 /* reserve and fill IE */ 1407 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1408 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1409 } 1410 1411 /* This function determines vht capability flags for the association 1412 * and builds the IE. 1413 * Note - the function returns true to own the MU-MIMO capability 1414 */ 1415 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1416 struct sk_buff *skb, 1417 struct ieee80211_supported_band *sband, 1418 struct ieee80211_vht_cap *ap_vht_cap, 1419 const struct ieee80211_conn_settings *conn) 1420 { 1421 struct ieee80211_local *local = sdata->local; 1422 u8 *pos; 1423 u32 cap; 1424 struct ieee80211_sta_vht_cap vht_cap; 1425 u32 mask, ap_bf_sts, our_bf_sts; 1426 bool mu_mimo_owner = false; 1427 1428 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1429 1430 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1431 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1432 1433 /* determine capability flags */ 1434 cap = vht_cap.cap; 1435 1436 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1437 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1438 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1439 } 1440 1441 /* 1442 * Some APs apparently get confused if our capabilities are better 1443 * than theirs, so restrict what we advertise in the assoc request. 1444 */ 1445 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1446 if (!(ap_vht_cap->vht_cap_info & 1447 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1448 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1449 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1450 else if (!(ap_vht_cap->vht_cap_info & 1451 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1452 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1453 } 1454 1455 /* 1456 * If some other vif is using the MU-MIMO capability we cannot associate 1457 * using MU-MIMO - this will lead to contradictions in the group-id 1458 * mechanism. 1459 * Ownership is defined since association request, in order to avoid 1460 * simultaneous associations with MU-MIMO. 1461 */ 1462 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1463 bool disable_mu_mimo = false; 1464 struct ieee80211_sub_if_data *other; 1465 1466 list_for_each_entry(other, &local->interfaces, list) { 1467 if (other->vif.bss_conf.mu_mimo_owner) { 1468 disable_mu_mimo = true; 1469 break; 1470 } 1471 } 1472 if (disable_mu_mimo) 1473 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1474 else 1475 mu_mimo_owner = true; 1476 } 1477 1478 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1479 1480 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1481 our_bf_sts = cap & mask; 1482 1483 if (ap_bf_sts < our_bf_sts) { 1484 cap &= ~mask; 1485 cap |= ap_bf_sts; 1486 } 1487 1488 /* reserve and fill IE */ 1489 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1490 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1491 1492 return mu_mimo_owner; 1493 } 1494 1495 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1496 struct sk_buff *skb, 1497 enum nl80211_chan_width width, 1498 struct ieee80211_supported_band *sband, 1499 struct ieee80211_mgd_assoc_data *assoc_data) 1500 { 1501 u32 rates; 1502 1503 if (assoc_data->supp_rates_len && 1504 !ieee80211_hw_check(&local->hw, STRICT)) { 1505 /* 1506 * Get all rates supported by the device and the AP as 1507 * some APs don't like getting a superset of their rates 1508 * in the association request (e.g. D-Link DAP 1353 in 1509 * b-only mode)... 1510 */ 1511 ieee80211_parse_bitrates(width, sband, 1512 assoc_data->supp_rates, 1513 assoc_data->supp_rates_len, 1514 &rates); 1515 } else { 1516 /* 1517 * In case AP not provide any supported rates information 1518 * before association, we send information element(s) with 1519 * all rates that we support. 1520 */ 1521 rates = ~0; 1522 } 1523 1524 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1525 WLAN_EID_SUPP_RATES); 1526 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1527 WLAN_EID_EXT_SUPP_RATES); 1528 } 1529 1530 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1531 const u8 *elems, 1532 size_t elems_len, 1533 size_t offset) 1534 { 1535 size_t noffset; 1536 1537 static const u8 before_ht[] = { 1538 WLAN_EID_SSID, 1539 WLAN_EID_SUPP_RATES, 1540 WLAN_EID_EXT_SUPP_RATES, 1541 WLAN_EID_PWR_CAPABILITY, 1542 WLAN_EID_SUPPORTED_CHANNELS, 1543 WLAN_EID_RSN, 1544 WLAN_EID_QOS_CAPA, 1545 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1546 WLAN_EID_MOBILITY_DOMAIN, 1547 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1548 WLAN_EID_RIC_DATA, /* reassoc only */ 1549 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1550 }; 1551 static const u8 after_ric[] = { 1552 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1553 WLAN_EID_HT_CAPABILITY, 1554 WLAN_EID_BSS_COEX_2040, 1555 /* luckily this is almost always there */ 1556 WLAN_EID_EXT_CAPABILITY, 1557 WLAN_EID_QOS_TRAFFIC_CAPA, 1558 WLAN_EID_TIM_BCAST_REQ, 1559 WLAN_EID_INTERWORKING, 1560 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1561 WLAN_EID_VHT_CAPABILITY, 1562 WLAN_EID_OPMODE_NOTIF, 1563 }; 1564 1565 if (!elems_len) 1566 return offset; 1567 1568 noffset = ieee80211_ie_split_ric(elems, elems_len, 1569 before_ht, 1570 ARRAY_SIZE(before_ht), 1571 after_ric, 1572 ARRAY_SIZE(after_ric), 1573 offset); 1574 skb_put_data(skb, elems + offset, noffset - offset); 1575 1576 return noffset; 1577 } 1578 1579 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1580 const u8 *elems, 1581 size_t elems_len, 1582 size_t offset) 1583 { 1584 static const u8 before_vht[] = { 1585 /* 1586 * no need to list the ones split off before HT 1587 * or generated here 1588 */ 1589 WLAN_EID_BSS_COEX_2040, 1590 WLAN_EID_EXT_CAPABILITY, 1591 WLAN_EID_QOS_TRAFFIC_CAPA, 1592 WLAN_EID_TIM_BCAST_REQ, 1593 WLAN_EID_INTERWORKING, 1594 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1595 }; 1596 size_t noffset; 1597 1598 if (!elems_len) 1599 return offset; 1600 1601 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1602 noffset = ieee80211_ie_split(elems, elems_len, 1603 before_vht, ARRAY_SIZE(before_vht), 1604 offset); 1605 skb_put_data(skb, elems + offset, noffset - offset); 1606 1607 return noffset; 1608 } 1609 1610 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1611 const u8 *elems, 1612 size_t elems_len, 1613 size_t offset) 1614 { 1615 static const u8 before_he[] = { 1616 /* 1617 * no need to list the ones split off before VHT 1618 * or generated here 1619 */ 1620 WLAN_EID_OPMODE_NOTIF, 1621 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1622 /* 11ai elements */ 1623 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1624 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1625 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1626 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1627 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1628 /* TODO: add 11ah/11aj/11ak elements */ 1629 }; 1630 size_t noffset; 1631 1632 if (!elems_len) 1633 return offset; 1634 1635 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1636 noffset = ieee80211_ie_split(elems, elems_len, 1637 before_he, ARRAY_SIZE(before_he), 1638 offset); 1639 skb_put_data(skb, elems + offset, noffset - offset); 1640 1641 return noffset; 1642 } 1643 1644 static size_t ieee80211_add_before_reg_conn(struct sk_buff *skb, 1645 const u8 *elems, size_t elems_len, 1646 size_t offset) 1647 { 1648 static const u8 before_reg_conn[] = { 1649 /* 1650 * no need to list the ones split off before HE 1651 * or generated here 1652 */ 1653 WLAN_EID_EXTENSION, WLAN_EID_EXT_DH_PARAMETER, 1654 WLAN_EID_EXTENSION, WLAN_EID_EXT_KNOWN_STA_IDENTIFCATION, 1655 }; 1656 size_t noffset; 1657 1658 if (!elems_len) 1659 return offset; 1660 1661 noffset = ieee80211_ie_split(elems, elems_len, before_reg_conn, 1662 ARRAY_SIZE(before_reg_conn), offset); 1663 skb_put_data(skb, elems + offset, noffset - offset); 1664 1665 return noffset; 1666 } 1667 1668 #define PRESENT_ELEMS_MAX 8 1669 #define PRESENT_ELEM_EXT_OFFS 0x100 1670 1671 static void 1672 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1673 struct sk_buff *skb, u16 capab, 1674 const struct element *ext_capa, 1675 const u16 *present_elems, 1676 struct ieee80211_mgd_assoc_data *assoc_data); 1677 1678 static size_t 1679 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1680 struct sk_buff *skb, u16 *capab, 1681 const struct element *ext_capa, 1682 const u8 *extra_elems, 1683 size_t extra_elems_len, 1684 unsigned int link_id, 1685 struct ieee80211_link_data *link, 1686 u16 *present_elems, 1687 struct ieee80211_mgd_assoc_data *assoc_data) 1688 { 1689 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1690 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1691 struct ieee80211_channel *chan = cbss->channel; 1692 const struct ieee80211_sband_iftype_data *iftd; 1693 struct ieee80211_local *local = sdata->local; 1694 struct ieee80211_supported_band *sband; 1695 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1696 struct ieee80211_chanctx_conf *chanctx_conf; 1697 enum ieee80211_smps_mode smps_mode; 1698 u16 orig_capab = *capab; 1699 size_t offset = 0; 1700 int present_elems_len = 0; 1701 u8 *pos; 1702 int i; 1703 1704 #define ADD_PRESENT_ELEM(id) do { \ 1705 /* need a last for termination - we use 0 == SSID */ \ 1706 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1707 present_elems[present_elems_len++] = (id); \ 1708 } while (0) 1709 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1710 1711 if (link) 1712 smps_mode = link->smps_mode; 1713 else if (sdata->u.mgd.powersave) 1714 smps_mode = IEEE80211_SMPS_DYNAMIC; 1715 else 1716 smps_mode = IEEE80211_SMPS_OFF; 1717 1718 if (link) { 1719 /* 1720 * 5/10 MHz scenarios are only viable without MLO, in which 1721 * case this pointer should be used ... All of this is a bit 1722 * unclear though, not sure this even works at all. 1723 */ 1724 rcu_read_lock(); 1725 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1726 if (chanctx_conf) 1727 width = chanctx_conf->def.width; 1728 rcu_read_unlock(); 1729 } 1730 1731 sband = local->hw.wiphy->bands[chan->band]; 1732 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1733 1734 if (sband->band == NL80211_BAND_2GHZ) { 1735 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1736 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1737 } 1738 1739 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1740 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1741 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1742 1743 if (sband->band != NL80211_BAND_S1GHZ) 1744 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1745 1746 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1747 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1748 struct cfg80211_chan_def chandef = { 1749 .width = width, 1750 .chan = chan, 1751 }; 1752 1753 pos = skb_put(skb, 4); 1754 *pos++ = WLAN_EID_PWR_CAPABILITY; 1755 *pos++ = 2; 1756 *pos++ = 0; /* min tx power */ 1757 /* max tx power */ 1758 *pos++ = ieee80211_chandef_max_power(&chandef); 1759 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1760 } 1761 1762 /* 1763 * Per spec, we shouldn't include the list of channels if we advertise 1764 * support for extended channel switching, but we've always done that; 1765 * (for now?) apply this restriction only on the (new) 6 GHz band. 1766 */ 1767 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1768 (sband->band != NL80211_BAND_6GHZ || 1769 !ext_capa || ext_capa->datalen < 1 || 1770 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1771 /* TODO: get this in reg domain format */ 1772 pos = skb_put(skb, 2 * sband->n_channels + 2); 1773 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1774 *pos++ = 2 * sband->n_channels; 1775 for (i = 0; i < sband->n_channels; i++) { 1776 int cf = sband->channels[i].center_freq; 1777 1778 *pos++ = ieee80211_frequency_to_channel(cf); 1779 *pos++ = 1; /* one channel in the subband*/ 1780 } 1781 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1782 } 1783 1784 /* if present, add any custom IEs that go before HT */ 1785 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1786 extra_elems_len, 1787 offset); 1788 1789 if (sband->band != NL80211_BAND_6GHZ && 1790 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1791 ieee80211_add_ht_ie(sdata, skb, 1792 assoc_data->link[link_id].ap_ht_param, 1793 sband, chan, smps_mode, 1794 &assoc_data->link[link_id].conn); 1795 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1796 } 1797 1798 /* if present, add any custom IEs that go before VHT */ 1799 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1800 extra_elems_len, 1801 offset); 1802 1803 if (sband->band != NL80211_BAND_6GHZ && 1804 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1805 sband->vht_cap.vht_supported) { 1806 bool mu_mimo_owner = 1807 ieee80211_add_vht_ie(sdata, skb, sband, 1808 &assoc_data->link[link_id].ap_vht_cap, 1809 &assoc_data->link[link_id].conn); 1810 1811 if (link) 1812 link->conf->mu_mimo_owner = mu_mimo_owner; 1813 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1814 } 1815 1816 /* if present, add any custom IEs that go before HE */ 1817 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1818 extra_elems_len, 1819 offset); 1820 1821 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1822 ieee80211_put_he_cap(skb, sdata, sband, 1823 &assoc_data->link[link_id].conn); 1824 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1825 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1826 } 1827 1828 /* 1829 * if present, add any custom IEs that go before regulatory 1830 * connectivity element 1831 */ 1832 offset = ieee80211_add_before_reg_conn(skb, extra_elems, 1833 extra_elems_len, offset); 1834 1835 if (sband->band == NL80211_BAND_6GHZ) { 1836 /* 1837 * as per Section E.2.7 of IEEE 802.11 REVme D7.0, non-AP STA 1838 * capable of operating on the 6 GHz band shall transmit 1839 * regulatory connectivity element. 1840 */ 1841 ieee80211_put_reg_conn(skb, chan->flags); 1842 } 1843 1844 /* 1845 * careful - need to know about all the present elems before 1846 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1847 * we're going to put it after the ML element 1848 */ 1849 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1850 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1851 1852 if (link_id == assoc_data->assoc_link_id) 1853 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1854 present_elems, assoc_data); 1855 1856 /* crash if somebody gets it wrong */ 1857 present_elems = NULL; 1858 1859 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1860 ieee80211_put_eht_cap(skb, sdata, sband, 1861 &assoc_data->link[link_id].conn); 1862 1863 if (sband->band == NL80211_BAND_S1GHZ) { 1864 ieee80211_add_aid_request_ie(sdata, skb); 1865 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1866 } 1867 1868 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1869 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1870 1871 return offset; 1872 } 1873 1874 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1875 const u16 *outer, 1876 const u16 *inner) 1877 { 1878 unsigned int skb_len = skb->len; 1879 bool at_extension = false; 1880 bool added = false; 1881 int i, j; 1882 u8 *len, *list_len = NULL; 1883 1884 skb_put_u8(skb, WLAN_EID_EXTENSION); 1885 len = skb_put(skb, 1); 1886 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1887 1888 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1889 u16 elem = outer[i]; 1890 bool have_inner = false; 1891 1892 /* should at least be sorted in the sense of normal -> ext */ 1893 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1894 1895 /* switch to extension list */ 1896 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1897 at_extension = true; 1898 if (!list_len) 1899 skb_put_u8(skb, 0); 1900 list_len = NULL; 1901 } 1902 1903 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1904 if (elem == inner[j]) { 1905 have_inner = true; 1906 break; 1907 } 1908 } 1909 1910 if (have_inner) 1911 continue; 1912 1913 if (!list_len) { 1914 list_len = skb_put(skb, 1); 1915 *list_len = 0; 1916 } 1917 *list_len += 1; 1918 skb_put_u8(skb, (u8)elem); 1919 added = true; 1920 } 1921 1922 /* if we added a list but no extension list, make a zero-len one */ 1923 if (added && (!at_extension || !list_len)) 1924 skb_put_u8(skb, 0); 1925 1926 /* if nothing added remove extension element completely */ 1927 if (!added) 1928 skb_trim(skb, skb_len); 1929 else 1930 *len = skb->len - skb_len - 2; 1931 } 1932 1933 static void 1934 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1935 struct sk_buff *skb, u16 capab, 1936 const struct element *ext_capa, 1937 const u16 *outer_present_elems, 1938 struct ieee80211_mgd_assoc_data *assoc_data) 1939 { 1940 struct ieee80211_local *local = sdata->local; 1941 struct ieee80211_multi_link_elem *ml_elem; 1942 struct ieee80211_mle_basic_common_info *common; 1943 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1944 __le16 eml_capa = 0, mld_capa_ops = 0; 1945 unsigned int link_id; 1946 u8 *ml_elem_len; 1947 void *capab_pos; 1948 1949 if (!ieee80211_vif_is_mld(&sdata->vif)) 1950 return; 1951 1952 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1953 ieee80211_vif_type_p2p(&sdata->vif)); 1954 if (ift_ext_capa) { 1955 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1956 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1957 } 1958 1959 skb_put_u8(skb, WLAN_EID_EXTENSION); 1960 ml_elem_len = skb_put(skb, 1); 1961 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1962 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1963 ml_elem->control = 1964 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1965 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1966 common = skb_put(skb, sizeof(*common)); 1967 common->len = sizeof(*common) + 1968 2; /* MLD capa/ops */ 1969 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1970 1971 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1972 if (eml_capa & 1973 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1974 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1975 common->len += 2; /* EML capabilities */ 1976 ml_elem->control |= 1977 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1978 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1979 } 1980 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1981 1982 if (assoc_data->ext_mld_capa_ops) { 1983 ml_elem->control |= 1984 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 1985 common->len += 2; 1986 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 1987 sizeof(assoc_data->ext_mld_capa_ops)); 1988 } 1989 1990 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1991 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1992 const u8 *extra_elems; 1993 size_t extra_elems_len; 1994 size_t extra_used; 1995 u8 *subelem_len = NULL; 1996 __le16 ctrl; 1997 1998 if (!assoc_data->link[link_id].bss || 1999 link_id == assoc_data->assoc_link_id) 2000 continue; 2001 2002 extra_elems = assoc_data->link[link_id].elems; 2003 extra_elems_len = assoc_data->link[link_id].elems_len; 2004 2005 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 2006 subelem_len = skb_put(skb, 1); 2007 2008 ctrl = cpu_to_le16(link_id | 2009 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 2010 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 2011 skb_put_data(skb, &ctrl, sizeof(ctrl)); 2012 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 2013 skb_put_data(skb, assoc_data->link[link_id].addr, 2014 ETH_ALEN); 2015 /* 2016 * Now add the contents of the (re)association request, 2017 * but the "listen interval" and "current AP address" 2018 * (if applicable) are skipped. So we only have 2019 * the capability field (remember the position and fill 2020 * later), followed by the elements added below by 2021 * calling ieee80211_add_link_elems(). 2022 */ 2023 capab_pos = skb_put(skb, 2); 2024 2025 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 2026 ext_capa, 2027 extra_elems, 2028 extra_elems_len, 2029 link_id, NULL, 2030 link_present_elems, 2031 assoc_data); 2032 if (extra_elems) 2033 skb_put_data(skb, extra_elems + extra_used, 2034 extra_elems_len - extra_used); 2035 2036 put_unaligned_le16(capab, capab_pos); 2037 2038 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2039 link_present_elems); 2040 2041 ieee80211_fragment_element(skb, subelem_len, 2042 IEEE80211_MLE_SUBELEM_FRAGMENT); 2043 } 2044 2045 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2046 } 2047 2048 static int 2049 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2050 enum nl80211_iftype iftype, 2051 struct cfg80211_bss *cbss, 2052 size_t elems_len) 2053 { 2054 struct ieee80211_local *local = sdata->local; 2055 const struct ieee80211_sband_iftype_data *iftd; 2056 struct ieee80211_supported_band *sband; 2057 size_t size = 0; 2058 2059 if (!cbss) 2060 return size; 2061 2062 sband = local->hw.wiphy->bands[cbss->channel->band]; 2063 2064 /* add STA profile elements length */ 2065 size += elems_len; 2066 2067 /* and supported rates length */ 2068 size += 4 + sband->n_bitrates; 2069 2070 /* supported channels */ 2071 size += 2 + 2 * sband->n_channels; 2072 2073 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2074 if (iftd) 2075 size += iftd->vendor_elems.len; 2076 2077 /* power capability */ 2078 size += 4; 2079 2080 /* HT, VHT, HE, EHT */ 2081 size += 2 + sizeof(struct ieee80211_ht_cap); 2082 size += 2 + sizeof(struct ieee80211_vht_cap); 2083 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2084 sizeof(struct ieee80211_he_mcs_nss_supp) + 2085 IEEE80211_HE_PPE_THRES_MAX_LEN; 2086 2087 if (sband->band == NL80211_BAND_6GHZ) 2088 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2089 2090 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2091 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2092 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2093 2094 return size; 2095 } 2096 2097 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2098 { 2099 struct ieee80211_local *local = sdata->local; 2100 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2101 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2102 struct ieee80211_link_data *link; 2103 struct sk_buff *skb; 2104 struct ieee80211_mgmt *mgmt; 2105 u8 *pos, qos_info, *ie_start; 2106 size_t offset, noffset; 2107 u16 capab = 0, link_capab; 2108 __le16 listen_int; 2109 struct element *ext_capa = NULL; 2110 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2111 struct ieee80211_prep_tx_info info = {}; 2112 unsigned int link_id, n_links = 0; 2113 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2114 void *capab_pos; 2115 size_t size; 2116 int ret; 2117 2118 /* we know it's writable, cast away the const */ 2119 if (assoc_data->ie_len) 2120 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2121 assoc_data->ie, 2122 assoc_data->ie_len); 2123 2124 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2125 2126 size = local->hw.extra_tx_headroom + 2127 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2128 2 + assoc_data->ssid_len + /* SSID */ 2129 assoc_data->ie_len + /* extra IEs */ 2130 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2131 9; /* WMM */ 2132 2133 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2134 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2135 size_t elems_len = assoc_data->link[link_id].elems_len; 2136 2137 if (!cbss) 2138 continue; 2139 2140 n_links++; 2141 2142 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2143 elems_len); 2144 2145 /* non-inheritance element */ 2146 size += 2 + 2 + PRESENT_ELEMS_MAX; 2147 2148 /* should be the same across all BSSes */ 2149 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2150 capab |= WLAN_CAPABILITY_PRIVACY; 2151 } 2152 2153 if (ieee80211_vif_is_mld(&sdata->vif)) { 2154 /* consider the multi-link element with STA profile */ 2155 size += sizeof(struct ieee80211_multi_link_elem); 2156 /* max common info field in basic multi-link element */ 2157 size += sizeof(struct ieee80211_mle_basic_common_info) + 2158 2 + /* capa & op */ 2159 2 + /* ext capa & op */ 2160 2; /* EML capa */ 2161 2162 /* 2163 * The capability elements were already considered above; 2164 * note this over-estimates a bit because there's no 2165 * STA profile for the assoc link. 2166 */ 2167 size += (n_links - 1) * 2168 (1 + 1 + /* subelement ID/length */ 2169 2 + /* STA control */ 2170 1 + ETH_ALEN + 2 /* STA Info field */); 2171 } 2172 2173 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2174 if (WARN_ON(!link)) 2175 return -EINVAL; 2176 2177 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2178 return -EINVAL; 2179 2180 skb = alloc_skb(size, GFP_KERNEL); 2181 if (!skb) 2182 return -ENOMEM; 2183 2184 skb_reserve(skb, local->hw.extra_tx_headroom); 2185 2186 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2187 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2188 2189 /* Set MBSSID support for HE AP if needed */ 2190 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2191 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2192 ext_capa && ext_capa->datalen >= 3) 2193 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2194 2195 mgmt = skb_put_zero(skb, 24); 2196 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2197 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2198 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2199 2200 listen_int = cpu_to_le16(assoc_data->s1g ? 2201 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2202 local->hw.conf.listen_interval); 2203 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2204 skb_put(skb, 10); 2205 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2206 IEEE80211_STYPE_REASSOC_REQ); 2207 capab_pos = &mgmt->u.reassoc_req.capab_info; 2208 mgmt->u.reassoc_req.listen_interval = listen_int; 2209 memcpy(mgmt->u.reassoc_req.current_ap, 2210 assoc_data->prev_ap_addr, ETH_ALEN); 2211 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2212 } else { 2213 skb_put(skb, 4); 2214 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2215 IEEE80211_STYPE_ASSOC_REQ); 2216 capab_pos = &mgmt->u.assoc_req.capab_info; 2217 mgmt->u.assoc_req.listen_interval = listen_int; 2218 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2219 } 2220 2221 /* SSID */ 2222 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2223 ie_start = pos; 2224 *pos++ = WLAN_EID_SSID; 2225 *pos++ = assoc_data->ssid_len; 2226 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2227 2228 /* 2229 * This bit is technically reserved, so it shouldn't matter for either 2230 * the AP or us, but it also means we shouldn't set it. However, we've 2231 * always set it in the past, and apparently some EHT APs check that 2232 * we don't set it. To avoid interoperability issues with old APs that 2233 * for some reason check it and want it to be set, set the bit for all 2234 * pre-EHT connections as we used to do. 2235 */ 2236 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2237 !ieee80211_hw_check(&local->hw, STRICT)) 2238 capab |= WLAN_CAPABILITY_ESS; 2239 2240 /* add the elements for the assoc (main) link */ 2241 link_capab = capab; 2242 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2243 ext_capa, 2244 assoc_data->ie, 2245 assoc_data->ie_len, 2246 assoc_data->assoc_link_id, link, 2247 present_elems, assoc_data); 2248 put_unaligned_le16(link_capab, capab_pos); 2249 2250 /* if present, add any custom non-vendor IEs */ 2251 if (assoc_data->ie_len) { 2252 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2253 assoc_data->ie_len, 2254 offset); 2255 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2256 offset = noffset; 2257 } 2258 2259 if (assoc_data->wmm) { 2260 if (assoc_data->uapsd) { 2261 qos_info = ifmgd->uapsd_queues; 2262 qos_info |= (ifmgd->uapsd_max_sp_len << 2263 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2264 } else { 2265 qos_info = 0; 2266 } 2267 2268 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2269 } 2270 2271 /* add any remaining custom (i.e. vendor specific here) IEs */ 2272 if (assoc_data->ie_len) { 2273 noffset = assoc_data->ie_len; 2274 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2275 } 2276 2277 if (assoc_data->fils_kek_len) { 2278 ret = fils_encrypt_assoc_req(skb, assoc_data); 2279 if (ret < 0) { 2280 dev_kfree_skb(skb); 2281 return ret; 2282 } 2283 } 2284 2285 pos = skb_tail_pointer(skb); 2286 kfree(ifmgd->assoc_req_ies); 2287 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2288 if (!ifmgd->assoc_req_ies) { 2289 dev_kfree_skb(skb); 2290 return -ENOMEM; 2291 } 2292 2293 ifmgd->assoc_req_ies_len = pos - ie_start; 2294 2295 info.link_id = assoc_data->assoc_link_id; 2296 drv_mgd_prepare_tx(local, sdata, &info); 2297 2298 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2299 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2300 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2301 IEEE80211_TX_INTFL_MLME_CONN_TX; 2302 ieee80211_tx_skb(sdata, skb); 2303 2304 return 0; 2305 } 2306 2307 void ieee80211_send_pspoll(struct ieee80211_local *local, 2308 struct ieee80211_sub_if_data *sdata) 2309 { 2310 struct ieee80211_pspoll *pspoll; 2311 struct sk_buff *skb; 2312 2313 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2314 if (!skb) 2315 return; 2316 2317 pspoll = (struct ieee80211_pspoll *) skb->data; 2318 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2319 2320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2321 ieee80211_tx_skb(sdata, skb); 2322 } 2323 2324 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2325 struct ieee80211_sub_if_data *sdata, 2326 bool powersave) 2327 { 2328 struct sk_buff *skb; 2329 struct ieee80211_hdr_3addr *nullfunc; 2330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2331 2332 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2333 !ieee80211_hw_check(&local->hw, 2334 DOESNT_SUPPORT_QOS_NDP)); 2335 if (!skb) 2336 return; 2337 2338 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2339 if (powersave) 2340 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2341 2342 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2343 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2344 2345 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2346 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2347 2348 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2349 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2350 2351 ieee80211_tx_skb(sdata, skb); 2352 } 2353 2354 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2355 struct ieee80211_sub_if_data *sdata) 2356 { 2357 struct sk_buff *skb; 2358 struct ieee80211_hdr *nullfunc; 2359 __le16 fc; 2360 2361 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2362 return; 2363 2364 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2365 if (!skb) 2366 return; 2367 2368 skb_reserve(skb, local->hw.extra_tx_headroom); 2369 2370 nullfunc = skb_put_zero(skb, 30); 2371 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2372 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2373 nullfunc->frame_control = fc; 2374 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2375 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2376 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2377 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2378 2379 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2380 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2381 ieee80211_tx_skb(sdata, skb); 2382 } 2383 2384 /* spectrum management related things */ 2385 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2386 struct wiphy_work *work) 2387 { 2388 struct ieee80211_link_data *link = 2389 container_of(work, struct ieee80211_link_data, 2390 u.mgd.csa.switch_work.work); 2391 struct ieee80211_sub_if_data *sdata = link->sdata; 2392 struct ieee80211_local *local = sdata->local; 2393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2394 int ret; 2395 2396 if (!ieee80211_sdata_running(sdata)) 2397 return; 2398 2399 lockdep_assert_wiphy(local->hw.wiphy); 2400 2401 if (!ifmgd->associated) 2402 return; 2403 2404 if (!link->conf->csa_active) 2405 return; 2406 2407 /* 2408 * If the link isn't active (now), we cannot wait for beacons, won't 2409 * have a reserved chanctx, etc. Just switch over the chandef and 2410 * update cfg80211 directly. 2411 */ 2412 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2413 struct link_sta_info *link_sta; 2414 struct sta_info *ap_sta; 2415 2416 link->conf->chanreq = link->csa.chanreq; 2417 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2418 link->link_id); 2419 link->conf->csa_active = false; 2420 2421 ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2422 if (WARN_ON(!ap_sta)) 2423 return; 2424 2425 link_sta = wiphy_dereference(wiphy, 2426 ap_sta->link[link->link_id]); 2427 if (WARN_ON(!link_sta)) 2428 return; 2429 2430 link_sta->pub->bandwidth = 2431 _ieee80211_sta_cur_vht_bw(link_sta, 2432 &link->csa.chanreq.oper); 2433 return; 2434 } 2435 2436 /* 2437 * using reservation isn't immediate as it may be deferred until later 2438 * with multi-vif. once reservation is complete it will re-schedule the 2439 * work with no reserved_chanctx so verify chandef to check if it 2440 * completed successfully 2441 */ 2442 2443 if (link->reserved_chanctx) { 2444 /* 2445 * with multi-vif csa driver may call ieee80211_csa_finish() 2446 * many times while waiting for other interfaces to use their 2447 * reservations 2448 */ 2449 if (link->reserved_ready) 2450 return; 2451 2452 ret = ieee80211_link_use_reserved_context(link); 2453 if (ret) { 2454 link_info(link, 2455 "failed to use reserved channel context, disconnecting (err=%d)\n", 2456 ret); 2457 wiphy_work_queue(sdata->local->hw.wiphy, 2458 &ifmgd->csa_connection_drop_work); 2459 } 2460 return; 2461 } 2462 2463 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2464 &link->csa.chanreq)) { 2465 link_info(link, 2466 "failed to finalize channel switch, disconnecting\n"); 2467 wiphy_work_queue(sdata->local->hw.wiphy, 2468 &ifmgd->csa_connection_drop_work); 2469 return; 2470 } 2471 2472 link->u.mgd.csa.waiting_bcn = true; 2473 2474 /* apply new TPE restrictions immediately on the new channel */ 2475 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2476 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2477 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2478 &link->u.mgd.csa.ap_chandef, 2479 &link->conf->chanreq.oper); 2480 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2481 sizeof(link->u.mgd.csa.tpe))) { 2482 link->conf->tpe = link->u.mgd.csa.tpe; 2483 ieee80211_link_info_change_notify(sdata, link, 2484 BSS_CHANGED_TPE); 2485 } 2486 } 2487 2488 ieee80211_sta_reset_beacon_monitor(sdata); 2489 ieee80211_sta_reset_conn_monitor(sdata); 2490 } 2491 2492 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2493 { 2494 struct ieee80211_sub_if_data *sdata = link->sdata; 2495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2496 int ret; 2497 2498 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2499 2500 WARN_ON(!link->conf->csa_active); 2501 2502 ieee80211_vif_unblock_queues_csa(sdata); 2503 2504 link->conf->csa_active = false; 2505 link->u.mgd.csa.blocked_tx = false; 2506 link->u.mgd.csa.waiting_bcn = false; 2507 2508 ret = drv_post_channel_switch(link); 2509 if (ret) { 2510 link_info(link, 2511 "driver post channel switch failed, disconnecting\n"); 2512 wiphy_work_queue(sdata->local->hw.wiphy, 2513 &ifmgd->csa_connection_drop_work); 2514 return; 2515 } 2516 2517 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2518 link->link_id); 2519 } 2520 2521 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2522 unsigned int link_id) 2523 { 2524 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2525 2526 trace_api_chswitch_done(sdata, success, link_id); 2527 2528 rcu_read_lock(); 2529 2530 if (!success) { 2531 sdata_info(sdata, 2532 "driver channel switch failed (link %d), disconnecting\n", 2533 link_id); 2534 wiphy_work_queue(sdata->local->hw.wiphy, 2535 &sdata->u.mgd.csa_connection_drop_work); 2536 } else { 2537 struct ieee80211_link_data *link = 2538 rcu_dereference(sdata->link[link_id]); 2539 2540 if (WARN_ON(!link)) { 2541 rcu_read_unlock(); 2542 return; 2543 } 2544 2545 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2546 &link->u.mgd.csa.switch_work, 0); 2547 } 2548 2549 rcu_read_unlock(); 2550 } 2551 EXPORT_SYMBOL(ieee80211_chswitch_done); 2552 2553 static void 2554 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2555 { 2556 struct ieee80211_sub_if_data *sdata = link->sdata; 2557 struct ieee80211_local *local = sdata->local; 2558 2559 lockdep_assert_wiphy(local->hw.wiphy); 2560 2561 if (!local->ops->abort_channel_switch) 2562 return; 2563 2564 ieee80211_link_unreserve_chanctx(link); 2565 2566 ieee80211_vif_unblock_queues_csa(sdata); 2567 2568 link->conf->csa_active = false; 2569 link->u.mgd.csa.blocked_tx = false; 2570 2571 drv_abort_channel_switch(link); 2572 } 2573 2574 struct sta_csa_rnr_iter_data { 2575 struct ieee80211_link_data *link; 2576 struct ieee80211_channel *chan; 2577 u8 mld_id; 2578 }; 2579 2580 static enum cfg80211_rnr_iter_ret 2581 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2582 const struct ieee80211_neighbor_ap_info *info, 2583 const u8 *tbtt_info, u8 tbtt_info_len) 2584 { 2585 struct sta_csa_rnr_iter_data *data = _data; 2586 struct ieee80211_link_data *link = data->link; 2587 struct ieee80211_sub_if_data *sdata = link->sdata; 2588 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2589 const struct ieee80211_tbtt_info_ge_11 *ti; 2590 enum nl80211_band band; 2591 unsigned int center_freq; 2592 int link_id; 2593 2594 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2595 return RNR_ITER_CONTINUE; 2596 2597 if (tbtt_info_len < sizeof(*ti)) 2598 return RNR_ITER_CONTINUE; 2599 2600 ti = (const void *)tbtt_info; 2601 2602 if (ti->mld_params.mld_id != data->mld_id) 2603 return RNR_ITER_CONTINUE; 2604 2605 link_id = le16_get_bits(ti->mld_params.params, 2606 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2607 if (link_id != data->link->link_id) 2608 return RNR_ITER_CONTINUE; 2609 2610 /* we found the entry for our link! */ 2611 2612 /* this AP is confused, it had this right before ... just disconnect */ 2613 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2614 link_info(link, 2615 "AP now has invalid operating class in RNR, disconnect\n"); 2616 wiphy_work_queue(sdata->local->hw.wiphy, 2617 &ifmgd->csa_connection_drop_work); 2618 return RNR_ITER_BREAK; 2619 } 2620 2621 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2622 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2623 2624 return RNR_ITER_BREAK; 2625 } 2626 2627 static void 2628 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2629 struct ieee802_11_elems *elems) 2630 { 2631 struct ieee80211_sub_if_data *sdata = link->sdata; 2632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2633 struct sta_csa_rnr_iter_data data = { 2634 .link = link, 2635 }; 2636 2637 /* 2638 * If we get here, we see a beacon from another link without 2639 * CSA still being reported for it, so now we have to check 2640 * if the CSA was aborted or completed. This may not even be 2641 * perfectly possible if the CSA was only done for changing 2642 * the puncturing, but in that case if the link in inactive 2643 * we don't really care, and if it's an active link (or when 2644 * it's activated later) we'll get a beacon and adjust. 2645 */ 2646 2647 if (WARN_ON(!elems->ml_basic)) 2648 return; 2649 2650 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2651 2652 /* 2653 * So in order to do this, iterate the RNR element(s) and see 2654 * what channel is reported now. 2655 */ 2656 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2657 ieee80211_sta_csa_rnr_iter, &data); 2658 2659 if (!data.chan) { 2660 link_info(link, 2661 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2662 wiphy_work_queue(sdata->local->hw.wiphy, 2663 &ifmgd->csa_connection_drop_work); 2664 return; 2665 } 2666 2667 /* 2668 * If it doesn't match the CSA, then assume it aborted. This 2669 * may erroneously detect that it was _not_ aborted when it 2670 * was in fact aborted, but only changed the bandwidth or the 2671 * puncturing configuration, but we don't have enough data to 2672 * detect that. 2673 */ 2674 if (data.chan != link->csa.chanreq.oper.chan) 2675 ieee80211_sta_abort_chanswitch(link); 2676 } 2677 2678 enum ieee80211_csa_source { 2679 IEEE80211_CSA_SOURCE_BEACON, 2680 IEEE80211_CSA_SOURCE_OTHER_LINK, 2681 IEEE80211_CSA_SOURCE_PROT_ACTION, 2682 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2683 }; 2684 2685 static void 2686 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2687 u64 timestamp, u32 device_timestamp, 2688 struct ieee802_11_elems *full_elems, 2689 struct ieee802_11_elems *csa_elems, 2690 enum ieee80211_csa_source source) 2691 { 2692 struct ieee80211_sub_if_data *sdata = link->sdata; 2693 struct ieee80211_local *local = sdata->local; 2694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2695 struct ieee80211_chanctx *chanctx = NULL; 2696 struct ieee80211_chanctx_conf *conf; 2697 struct ieee80211_csa_ie csa_ie = {}; 2698 struct ieee80211_channel_switch ch_switch = { 2699 .link_id = link->link_id, 2700 .timestamp = timestamp, 2701 .device_timestamp = device_timestamp, 2702 }; 2703 unsigned long now; 2704 int res; 2705 2706 lockdep_assert_wiphy(local->hw.wiphy); 2707 2708 if (csa_elems) { 2709 struct cfg80211_bss *cbss = link->conf->bss; 2710 enum nl80211_band current_band; 2711 struct ieee80211_bss *bss; 2712 2713 if (WARN_ON(!cbss)) 2714 return; 2715 2716 current_band = cbss->channel->band; 2717 bss = (void *)cbss->priv; 2718 2719 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2720 current_band, 2721 bss->vht_cap_info, 2722 &link->u.mgd.conn, 2723 link->u.mgd.bssid, 2724 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2725 &csa_ie); 2726 if (res == 0) { 2727 ch_switch.block_tx = csa_ie.mode; 2728 ch_switch.chandef = csa_ie.chanreq.oper; 2729 ch_switch.count = csa_ie.count; 2730 ch_switch.delay = csa_ie.max_switch_time; 2731 } 2732 2733 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2734 } else { 2735 /* 2736 * If there was no per-STA profile for this link, we 2737 * get called with csa_elems == NULL. This of course means 2738 * there are no CSA elements, so set res=1 indicating 2739 * no more CSA. 2740 */ 2741 res = 1; 2742 } 2743 2744 if (res < 0) { 2745 /* ignore this case, not a protected frame */ 2746 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2747 return; 2748 goto drop_connection; 2749 } 2750 2751 if (link->conf->csa_active) { 2752 switch (source) { 2753 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2754 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2755 /* already processing - disregard action frames */ 2756 return; 2757 case IEEE80211_CSA_SOURCE_BEACON: 2758 if (link->u.mgd.csa.waiting_bcn) { 2759 ieee80211_chswitch_post_beacon(link); 2760 /* 2761 * If the CSA is still present after the switch 2762 * we need to consider it as a new CSA (possibly 2763 * to self). This happens by not returning here 2764 * so we'll get to the check below. 2765 */ 2766 } else if (res) { 2767 ieee80211_sta_abort_chanswitch(link); 2768 return; 2769 } else { 2770 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2771 return; 2772 } 2773 break; 2774 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2775 /* active link: we want to see the beacon to continue */ 2776 if (ieee80211_vif_link_active(&sdata->vif, 2777 link->link_id)) 2778 return; 2779 2780 /* switch work ran, so just complete the process */ 2781 if (link->u.mgd.csa.waiting_bcn) { 2782 ieee80211_chswitch_post_beacon(link); 2783 /* 2784 * If the CSA is still present after the switch 2785 * we need to consider it as a new CSA (possibly 2786 * to self). This happens by not returning here 2787 * so we'll get to the check below. 2788 */ 2789 break; 2790 } 2791 2792 /* link still has CSA but we already know, do nothing */ 2793 if (!res) 2794 return; 2795 2796 /* check in the RNR if the CSA aborted */ 2797 ieee80211_sta_other_link_csa_disappeared(link, 2798 full_elems); 2799 return; 2800 } 2801 } 2802 2803 /* no active CSA nor a new one */ 2804 if (res) { 2805 /* 2806 * However, we may have stopped queues when receiving a public 2807 * action frame that couldn't be protected, if it had the quiet 2808 * bit set. This is a trade-off, we want to be quiet as soon as 2809 * possible, but also don't trust the public action frame much, 2810 * as it can't be protected. 2811 */ 2812 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2813 link->u.mgd.csa.blocked_tx = false; 2814 ieee80211_vif_unblock_queues_csa(sdata); 2815 } 2816 return; 2817 } 2818 2819 /* 2820 * We don't really trust public action frames, but block queues (go to 2821 * quiet mode) for them anyway, we should get a beacon soon to either 2822 * know what the CSA really is, or figure out the public action frame 2823 * was actually an attack. 2824 */ 2825 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2826 if (csa_ie.mode) { 2827 link->u.mgd.csa.blocked_tx = true; 2828 ieee80211_vif_block_queues_csa(sdata); 2829 } 2830 return; 2831 } 2832 2833 if (link->conf->chanreq.oper.chan->band != 2834 csa_ie.chanreq.oper.chan->band) { 2835 link_info(link, 2836 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2837 link->u.mgd.bssid, 2838 csa_ie.chanreq.oper.chan->center_freq, 2839 csa_ie.chanreq.oper.width, 2840 csa_ie.chanreq.oper.center_freq1, 2841 csa_ie.chanreq.oper.center_freq2); 2842 goto drop_connection; 2843 } 2844 2845 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2846 IEEE80211_CHAN_DISABLED)) { 2847 link_info(link, 2848 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2849 link->u.mgd.bssid, 2850 csa_ie.chanreq.oper.chan->center_freq, 2851 csa_ie.chanreq.oper.chan->freq_offset, 2852 csa_ie.chanreq.oper.width, 2853 csa_ie.chanreq.oper.center_freq1, 2854 csa_ie.chanreq.oper.freq1_offset, 2855 csa_ie.chanreq.oper.center_freq2); 2856 goto drop_connection; 2857 } 2858 2859 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2860 &link->conf->chanreq.oper) && 2861 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2862 if (link->u.mgd.csa.ignored_same_chan) 2863 return; 2864 link_info(link, 2865 "AP %pM tries to chanswitch to same channel, ignore\n", 2866 link->u.mgd.bssid); 2867 link->u.mgd.csa.ignored_same_chan = true; 2868 return; 2869 } 2870 2871 /* 2872 * Drop all TDLS peers on the affected link - either we disconnect or 2873 * move to a different channel from this point on. There's no telling 2874 * what our peer will do. 2875 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2876 * have an incompatible wider chandef. 2877 */ 2878 ieee80211_teardown_tdls_peers(link); 2879 2880 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2881 lockdep_is_held(&local->hw.wiphy->mtx)); 2882 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2883 link_info(link, 2884 "no channel context assigned to vif?, disconnecting\n"); 2885 goto drop_connection; 2886 } 2887 2888 if (conf) 2889 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2890 2891 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2892 link_info(link, 2893 "driver doesn't support chan-switch with channel contexts\n"); 2894 goto drop_connection; 2895 } 2896 2897 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2898 link_info(link, 2899 "preparing for channel switch failed, disconnecting\n"); 2900 goto drop_connection; 2901 } 2902 2903 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2904 2905 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2906 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2907 &csa_ie.chanreq.ap); 2908 2909 if (chanctx) { 2910 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2911 chanctx->mode, false); 2912 if (res) { 2913 link_info(link, 2914 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2915 res); 2916 goto drop_connection; 2917 } 2918 } 2919 2920 link->conf->csa_active = true; 2921 link->u.mgd.csa.ignored_same_chan = false; 2922 link->u.mgd.beacon_crc_valid = false; 2923 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2924 2925 if (csa_ie.mode) 2926 ieee80211_vif_block_queues_csa(sdata); 2927 2928 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2929 link->link_id, csa_ie.count, 2930 csa_ie.mode); 2931 2932 /* we may have to handle timeout for deactivated link in software */ 2933 now = jiffies; 2934 link->u.mgd.csa.time = now + 2935 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2936 link->conf->beacon_int); 2937 2938 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2939 local->ops->channel_switch) { 2940 /* 2941 * Use driver's channel switch callback, the driver will 2942 * later call ieee80211_chswitch_done(). It may deactivate 2943 * the link as well, we handle that elsewhere and queue 2944 * the csa.switch_work for the calculated time then. 2945 */ 2946 drv_channel_switch(local, sdata, &ch_switch); 2947 return; 2948 } 2949 2950 /* channel switch handled in software */ 2951 wiphy_delayed_work_queue(local->hw.wiphy, 2952 &link->u.mgd.csa.switch_work, 2953 link->u.mgd.csa.time - now); 2954 return; 2955 drop_connection: 2956 /* 2957 * This is just so that the disconnect flow will know that 2958 * we were trying to switch channel and failed. In case the 2959 * mode is 1 (we are not allowed to Tx), we will know not to 2960 * send a deauthentication frame. Those two fields will be 2961 * reset when the disconnection worker runs. 2962 */ 2963 link->conf->csa_active = true; 2964 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2965 2966 wiphy_work_queue(sdata->local->hw.wiphy, 2967 &ifmgd->csa_connection_drop_work); 2968 } 2969 2970 struct sta_bss_param_ch_cnt_data { 2971 struct ieee80211_sub_if_data *sdata; 2972 u8 reporting_link_id; 2973 u8 mld_id; 2974 }; 2975 2976 static enum cfg80211_rnr_iter_ret 2977 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2978 const struct ieee80211_neighbor_ap_info *info, 2979 const u8 *tbtt_info, u8 tbtt_info_len) 2980 { 2981 struct sta_bss_param_ch_cnt_data *data = _data; 2982 struct ieee80211_sub_if_data *sdata = data->sdata; 2983 const struct ieee80211_tbtt_info_ge_11 *ti; 2984 u8 bss_param_ch_cnt; 2985 int link_id; 2986 2987 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2988 return RNR_ITER_CONTINUE; 2989 2990 if (tbtt_info_len < sizeof(*ti)) 2991 return RNR_ITER_CONTINUE; 2992 2993 ti = (const void *)tbtt_info; 2994 2995 if (ti->mld_params.mld_id != data->mld_id) 2996 return RNR_ITER_CONTINUE; 2997 2998 link_id = le16_get_bits(ti->mld_params.params, 2999 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 3000 bss_param_ch_cnt = 3001 le16_get_bits(ti->mld_params.params, 3002 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 3003 3004 if (bss_param_ch_cnt != 255 && 3005 link_id < ARRAY_SIZE(sdata->link)) { 3006 struct ieee80211_link_data *link = 3007 sdata_dereference(sdata->link[link_id], sdata); 3008 3009 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 3010 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 3011 link->conf->bss_param_ch_cnt_link_id = 3012 data->reporting_link_id; 3013 } 3014 } 3015 3016 return RNR_ITER_CONTINUE; 3017 } 3018 3019 static void 3020 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 3021 struct ieee80211_bss_conf *bss_conf, 3022 struct ieee802_11_elems *elems) 3023 { 3024 struct sta_bss_param_ch_cnt_data data = { 3025 .reporting_link_id = bss_conf->link_id, 3026 .sdata = sdata, 3027 }; 3028 int bss_param_ch_cnt; 3029 3030 if (!elems->ml_basic) 3031 return; 3032 3033 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 3034 3035 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 3036 ieee80211_sta_bss_param_ch_cnt_iter, &data); 3037 3038 bss_param_ch_cnt = 3039 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 3040 3041 /* 3042 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 3043 * didn't change to indicate that we got a beacon on our own 3044 * link. 3045 */ 3046 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3047 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3048 bss_conf->bss_param_ch_cnt_link_id = 3049 bss_conf->link_id; 3050 } 3051 } 3052 3053 static bool 3054 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3055 const u8 *country_ie, u8 country_ie_len, 3056 const u8 *pwr_constr_elem, 3057 int *chan_pwr, int *pwr_reduction) 3058 { 3059 struct ieee80211_country_ie_triplet *triplet; 3060 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3061 int i, chan_increment; 3062 bool have_chan_pwr = false; 3063 3064 /* Invalid IE */ 3065 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3066 return false; 3067 3068 triplet = (void *)(country_ie + 3); 3069 country_ie_len -= 3; 3070 3071 switch (channel->band) { 3072 default: 3073 WARN_ON_ONCE(1); 3074 fallthrough; 3075 case NL80211_BAND_2GHZ: 3076 case NL80211_BAND_60GHZ: 3077 case NL80211_BAND_LC: 3078 chan_increment = 1; 3079 break; 3080 case NL80211_BAND_5GHZ: 3081 chan_increment = 4; 3082 break; 3083 case NL80211_BAND_6GHZ: 3084 /* 3085 * In the 6 GHz band, the "maximum transmit power level" 3086 * field in the triplets is reserved, and thus will be 3087 * zero and we shouldn't use it to control TX power. 3088 * The actual TX power will be given in the transmit 3089 * power envelope element instead. 3090 */ 3091 return false; 3092 } 3093 3094 /* find channel */ 3095 while (country_ie_len >= 3) { 3096 u8 first_channel = triplet->chans.first_channel; 3097 3098 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3099 goto next; 3100 3101 for (i = 0; i < triplet->chans.num_channels; i++) { 3102 if (first_channel + i * chan_increment == chan) { 3103 have_chan_pwr = true; 3104 *chan_pwr = triplet->chans.max_power; 3105 break; 3106 } 3107 } 3108 if (have_chan_pwr) 3109 break; 3110 3111 next: 3112 triplet++; 3113 country_ie_len -= 3; 3114 } 3115 3116 if (have_chan_pwr && pwr_constr_elem) 3117 *pwr_reduction = *pwr_constr_elem; 3118 else 3119 *pwr_reduction = 0; 3120 3121 return have_chan_pwr; 3122 } 3123 3124 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3125 const u8 *cisco_dtpc_ie, 3126 int *pwr_level) 3127 { 3128 /* From practical testing, the first data byte of the DTPC element 3129 * seems to contain the requested dBm level, and the CLI on Cisco 3130 * APs clearly state the range is -127 to 127 dBm, which indicates 3131 * a signed byte, although it seemingly never actually goes negative. 3132 * The other byte seems to always be zero. 3133 */ 3134 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3135 } 3136 3137 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3138 struct ieee80211_channel *channel, 3139 struct ieee80211_mgmt *mgmt, 3140 const u8 *country_ie, u8 country_ie_len, 3141 const u8 *pwr_constr_ie, 3142 const u8 *cisco_dtpc_ie) 3143 { 3144 struct ieee80211_sub_if_data *sdata = link->sdata; 3145 bool has_80211h_pwr = false, has_cisco_pwr = false; 3146 int chan_pwr = 0, pwr_reduction_80211h = 0; 3147 int pwr_level_cisco, pwr_level_80211h; 3148 int new_ap_level; 3149 __le16 capab = mgmt->u.probe_resp.capab_info; 3150 3151 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3152 return 0; /* TODO */ 3153 3154 if (country_ie && 3155 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3156 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3157 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3158 channel, country_ie, country_ie_len, 3159 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3160 pwr_level_80211h = 3161 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3162 } 3163 3164 if (cisco_dtpc_ie) { 3165 ieee80211_find_cisco_dtpc( 3166 channel, cisco_dtpc_ie, &pwr_level_cisco); 3167 has_cisco_pwr = true; 3168 } 3169 3170 if (!has_80211h_pwr && !has_cisco_pwr) 3171 return 0; 3172 3173 /* If we have both 802.11h and Cisco DTPC, apply both limits 3174 * by picking the smallest of the two power levels advertised. 3175 */ 3176 if (has_80211h_pwr && 3177 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3178 new_ap_level = pwr_level_80211h; 3179 3180 if (link->ap_power_level == new_ap_level) 3181 return 0; 3182 3183 sdata_dbg(sdata, 3184 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3185 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3186 link->u.mgd.bssid); 3187 } else { /* has_cisco_pwr is always true here. */ 3188 new_ap_level = pwr_level_cisco; 3189 3190 if (link->ap_power_level == new_ap_level) 3191 return 0; 3192 3193 sdata_dbg(sdata, 3194 "Limiting TX power to %d dBm as advertised by %pM\n", 3195 pwr_level_cisco, link->u.mgd.bssid); 3196 } 3197 3198 link->ap_power_level = new_ap_level; 3199 if (__ieee80211_recalc_txpower(link)) 3200 return BSS_CHANGED_TXPOWER; 3201 return 0; 3202 } 3203 3204 /* powersave */ 3205 static void ieee80211_enable_ps(struct ieee80211_local *local, 3206 struct ieee80211_sub_if_data *sdata) 3207 { 3208 struct ieee80211_conf *conf = &local->hw.conf; 3209 3210 /* 3211 * If we are scanning right now then the parameters will 3212 * take effect when scan finishes. 3213 */ 3214 if (local->scanning) 3215 return; 3216 3217 if (conf->dynamic_ps_timeout > 0 && 3218 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3219 mod_timer(&local->dynamic_ps_timer, jiffies + 3220 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3221 } else { 3222 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3223 ieee80211_send_nullfunc(local, sdata, true); 3224 3225 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3226 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3227 return; 3228 3229 conf->flags |= IEEE80211_CONF_PS; 3230 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3231 } 3232 } 3233 3234 static void ieee80211_change_ps(struct ieee80211_local *local) 3235 { 3236 struct ieee80211_conf *conf = &local->hw.conf; 3237 3238 if (local->ps_sdata) { 3239 ieee80211_enable_ps(local, local->ps_sdata); 3240 } else if (conf->flags & IEEE80211_CONF_PS) { 3241 conf->flags &= ~IEEE80211_CONF_PS; 3242 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3243 timer_delete_sync(&local->dynamic_ps_timer); 3244 wiphy_work_cancel(local->hw.wiphy, 3245 &local->dynamic_ps_enable_work); 3246 } 3247 } 3248 3249 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3250 { 3251 struct ieee80211_local *local = sdata->local; 3252 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3253 struct sta_info *sta = NULL; 3254 bool authorized = false; 3255 3256 if (!mgd->powersave) 3257 return false; 3258 3259 if (mgd->broken_ap) 3260 return false; 3261 3262 if (!mgd->associated) 3263 return false; 3264 3265 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3266 return false; 3267 3268 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3269 !sdata->deflink.u.mgd.have_beacon) 3270 return false; 3271 3272 rcu_read_lock(); 3273 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3274 if (sta) 3275 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3276 rcu_read_unlock(); 3277 3278 return authorized; 3279 } 3280 3281 /* need to hold RTNL or interface lock */ 3282 void ieee80211_recalc_ps(struct ieee80211_local *local) 3283 { 3284 struct ieee80211_sub_if_data *sdata, *found = NULL; 3285 int count = 0; 3286 int timeout; 3287 3288 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3289 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3290 local->ps_sdata = NULL; 3291 return; 3292 } 3293 3294 list_for_each_entry(sdata, &local->interfaces, list) { 3295 if (!ieee80211_sdata_running(sdata)) 3296 continue; 3297 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3298 /* If an AP vif is found, then disable PS 3299 * by setting the count to zero thereby setting 3300 * ps_sdata to NULL. 3301 */ 3302 count = 0; 3303 break; 3304 } 3305 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3306 continue; 3307 found = sdata; 3308 count++; 3309 } 3310 3311 if (count == 1 && ieee80211_powersave_allowed(found)) { 3312 u8 dtimper = found->deflink.u.mgd.dtim_period; 3313 3314 timeout = local->dynamic_ps_forced_timeout; 3315 if (timeout < 0) 3316 timeout = 100; 3317 local->hw.conf.dynamic_ps_timeout = timeout; 3318 3319 /* If the TIM IE is invalid, pretend the value is 1 */ 3320 if (!dtimper) 3321 dtimper = 1; 3322 3323 local->hw.conf.ps_dtim_period = dtimper; 3324 local->ps_sdata = found; 3325 } else { 3326 local->ps_sdata = NULL; 3327 } 3328 3329 ieee80211_change_ps(local); 3330 } 3331 3332 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3333 { 3334 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3335 3336 if (sdata->vif.cfg.ps != ps_allowed) { 3337 sdata->vif.cfg.ps = ps_allowed; 3338 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3339 } 3340 } 3341 3342 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3343 struct wiphy_work *work) 3344 { 3345 struct ieee80211_local *local = 3346 container_of(work, struct ieee80211_local, 3347 dynamic_ps_disable_work); 3348 3349 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3350 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3351 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3352 } 3353 3354 ieee80211_wake_queues_by_reason(&local->hw, 3355 IEEE80211_MAX_QUEUE_MAP, 3356 IEEE80211_QUEUE_STOP_REASON_PS, 3357 false); 3358 } 3359 3360 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3361 struct wiphy_work *work) 3362 { 3363 struct ieee80211_local *local = 3364 container_of(work, struct ieee80211_local, 3365 dynamic_ps_enable_work); 3366 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3367 struct ieee80211_if_managed *ifmgd; 3368 unsigned long flags; 3369 int q; 3370 3371 /* can only happen when PS was just disabled anyway */ 3372 if (!sdata) 3373 return; 3374 3375 ifmgd = &sdata->u.mgd; 3376 3377 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3378 return; 3379 3380 if (local->hw.conf.dynamic_ps_timeout > 0) { 3381 /* don't enter PS if TX frames are pending */ 3382 if (drv_tx_frames_pending(local)) { 3383 mod_timer(&local->dynamic_ps_timer, jiffies + 3384 msecs_to_jiffies( 3385 local->hw.conf.dynamic_ps_timeout)); 3386 return; 3387 } 3388 3389 /* 3390 * transmission can be stopped by others which leads to 3391 * dynamic_ps_timer expiry. Postpone the ps timer if it 3392 * is not the actual idle state. 3393 */ 3394 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3395 for (q = 0; q < local->hw.queues; q++) { 3396 if (local->queue_stop_reasons[q]) { 3397 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3398 flags); 3399 mod_timer(&local->dynamic_ps_timer, jiffies + 3400 msecs_to_jiffies( 3401 local->hw.conf.dynamic_ps_timeout)); 3402 return; 3403 } 3404 } 3405 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3406 } 3407 3408 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3409 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3410 if (drv_tx_frames_pending(local)) { 3411 mod_timer(&local->dynamic_ps_timer, jiffies + 3412 msecs_to_jiffies( 3413 local->hw.conf.dynamic_ps_timeout)); 3414 } else { 3415 ieee80211_send_nullfunc(local, sdata, true); 3416 /* Flush to get the tx status of nullfunc frame */ 3417 ieee80211_flush_queues(local, sdata, false); 3418 } 3419 } 3420 3421 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3422 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3423 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3424 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3425 local->hw.conf.flags |= IEEE80211_CONF_PS; 3426 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 3427 } 3428 } 3429 3430 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3431 { 3432 struct ieee80211_local *local = timer_container_of(local, t, 3433 dynamic_ps_timer); 3434 3435 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3436 } 3437 3438 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3439 { 3440 struct ieee80211_link_data *link = 3441 container_of(work, struct ieee80211_link_data, 3442 dfs_cac_timer_work.work); 3443 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3444 struct ieee80211_sub_if_data *sdata = link->sdata; 3445 3446 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3447 3448 if (sdata->wdev.links[link->link_id].cac_started) { 3449 ieee80211_link_release_channel(link); 3450 cfg80211_cac_event(sdata->dev, &chandef, 3451 NL80211_RADAR_CAC_FINISHED, 3452 GFP_KERNEL, link->link_id); 3453 } 3454 } 3455 3456 static bool 3457 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3458 { 3459 struct ieee80211_local *local = sdata->local; 3460 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3461 bool ret = false; 3462 int ac; 3463 3464 if (local->hw.queues < IEEE80211_NUM_ACS) 3465 return false; 3466 3467 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3468 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3469 int non_acm_ac; 3470 unsigned long now = jiffies; 3471 3472 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3473 tx_tspec->admitted_time && 3474 time_after(now, tx_tspec->time_slice_start + HZ)) { 3475 tx_tspec->consumed_tx_time = 0; 3476 tx_tspec->time_slice_start = now; 3477 3478 if (tx_tspec->downgraded) 3479 tx_tspec->action = 3480 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3481 } 3482 3483 switch (tx_tspec->action) { 3484 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3485 /* take the original parameters */ 3486 if (drv_conf_tx(local, &sdata->deflink, ac, 3487 &sdata->deflink.tx_conf[ac])) 3488 link_err(&sdata->deflink, 3489 "failed to set TX queue parameters for queue %d\n", 3490 ac); 3491 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3492 tx_tspec->downgraded = false; 3493 ret = true; 3494 break; 3495 case TX_TSPEC_ACTION_DOWNGRADE: 3496 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3497 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3498 ret = true; 3499 break; 3500 } 3501 /* downgrade next lower non-ACM AC */ 3502 for (non_acm_ac = ac + 1; 3503 non_acm_ac < IEEE80211_NUM_ACS; 3504 non_acm_ac++) 3505 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3506 break; 3507 /* Usually the loop will result in using BK even if it 3508 * requires admission control, but such a configuration 3509 * makes no sense and we have to transmit somehow - the 3510 * AC selection does the same thing. 3511 * If we started out trying to downgrade from BK, then 3512 * the extra condition here might be needed. 3513 */ 3514 if (non_acm_ac >= IEEE80211_NUM_ACS) 3515 non_acm_ac = IEEE80211_AC_BK; 3516 if (drv_conf_tx(local, &sdata->deflink, ac, 3517 &sdata->deflink.tx_conf[non_acm_ac])) 3518 link_err(&sdata->deflink, 3519 "failed to set TX queue parameters for queue %d\n", 3520 ac); 3521 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3522 ret = true; 3523 wiphy_delayed_work_queue(local->hw.wiphy, 3524 &ifmgd->tx_tspec_wk, 3525 tx_tspec->time_slice_start + 3526 HZ - now + 1); 3527 break; 3528 case TX_TSPEC_ACTION_NONE: 3529 /* nothing now */ 3530 break; 3531 } 3532 } 3533 3534 return ret; 3535 } 3536 3537 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3538 { 3539 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3540 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3541 BSS_CHANGED_QOS); 3542 } 3543 3544 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3545 struct wiphy_work *work) 3546 { 3547 struct ieee80211_sub_if_data *sdata; 3548 3549 sdata = container_of(work, struct ieee80211_sub_if_data, 3550 u.mgd.tx_tspec_wk.work); 3551 ieee80211_sta_handle_tspec_ac_params(sdata); 3552 } 3553 3554 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3555 { 3556 struct ieee80211_sub_if_data *sdata = link->sdata; 3557 struct ieee80211_local *local = sdata->local; 3558 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3559 struct ieee80211_tx_queue_params *params = link->tx_conf; 3560 u8 ac; 3561 3562 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3563 mlme_dbg(sdata, 3564 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3565 ac, params[ac].acm, 3566 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3567 params[ac].txop, params[ac].uapsd, 3568 ifmgd->tx_tspec[ac].downgraded); 3569 if (!ifmgd->tx_tspec[ac].downgraded && 3570 drv_conf_tx(local, link, ac, ¶ms[ac])) 3571 link_err(link, 3572 "failed to set TX queue parameters for AC %d\n", 3573 ac); 3574 } 3575 } 3576 3577 /* MLME */ 3578 static bool 3579 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3580 struct ieee80211_link_data *link, 3581 const u8 *wmm_param, size_t wmm_param_len, 3582 const struct ieee80211_mu_edca_param_set *mu_edca) 3583 { 3584 struct ieee80211_sub_if_data *sdata = link->sdata; 3585 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3587 size_t left; 3588 int count, mu_edca_count, ac; 3589 const u8 *pos; 3590 u8 uapsd_queues = 0; 3591 3592 if (!local->ops->conf_tx) 3593 return false; 3594 3595 if (local->hw.queues < IEEE80211_NUM_ACS) 3596 return false; 3597 3598 if (!wmm_param) 3599 return false; 3600 3601 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3602 return false; 3603 3604 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3605 uapsd_queues = ifmgd->uapsd_queues; 3606 3607 count = wmm_param[6] & 0x0f; 3608 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3609 * if mu_edca was preset before and now it disappeared tell 3610 * the driver about it. 3611 */ 3612 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3613 if (count == link->u.mgd.wmm_last_param_set && 3614 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3615 return false; 3616 link->u.mgd.wmm_last_param_set = count; 3617 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3618 3619 pos = wmm_param + 8; 3620 left = wmm_param_len - 8; 3621 3622 memset(¶ms, 0, sizeof(params)); 3623 3624 sdata->wmm_acm = 0; 3625 for (; left >= 4; left -= 4, pos += 4) { 3626 int aci = (pos[0] >> 5) & 0x03; 3627 int acm = (pos[0] >> 4) & 0x01; 3628 bool uapsd = false; 3629 3630 switch (aci) { 3631 case 1: /* AC_BK */ 3632 ac = IEEE80211_AC_BK; 3633 if (acm) 3634 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3635 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3636 uapsd = true; 3637 params[ac].mu_edca = !!mu_edca; 3638 if (mu_edca) 3639 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3640 break; 3641 case 2: /* AC_VI */ 3642 ac = IEEE80211_AC_VI; 3643 if (acm) 3644 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3645 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3646 uapsd = true; 3647 params[ac].mu_edca = !!mu_edca; 3648 if (mu_edca) 3649 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3650 break; 3651 case 3: /* AC_VO */ 3652 ac = IEEE80211_AC_VO; 3653 if (acm) 3654 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3655 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3656 uapsd = true; 3657 params[ac].mu_edca = !!mu_edca; 3658 if (mu_edca) 3659 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3660 break; 3661 case 0: /* AC_BE */ 3662 default: 3663 ac = IEEE80211_AC_BE; 3664 if (acm) 3665 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3666 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3667 uapsd = true; 3668 params[ac].mu_edca = !!mu_edca; 3669 if (mu_edca) 3670 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3671 break; 3672 } 3673 3674 params[ac].aifs = pos[0] & 0x0f; 3675 3676 if (params[ac].aifs < 2) { 3677 link_info(link, 3678 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3679 params[ac].aifs, aci); 3680 params[ac].aifs = 2; 3681 } 3682 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3683 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3684 params[ac].txop = get_unaligned_le16(pos + 2); 3685 params[ac].acm = acm; 3686 params[ac].uapsd = uapsd; 3687 3688 if (params[ac].cw_min == 0 || 3689 params[ac].cw_min > params[ac].cw_max) { 3690 link_info(link, 3691 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3692 params[ac].cw_min, params[ac].cw_max, aci); 3693 return false; 3694 } 3695 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3696 } 3697 3698 /* WMM specification requires all 4 ACIs. */ 3699 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3700 if (params[ac].cw_min == 0) { 3701 link_info(link, 3702 "AP has invalid WMM params (missing AC %d), using defaults\n", 3703 ac); 3704 return false; 3705 } 3706 } 3707 3708 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3709 link->tx_conf[ac] = params[ac]; 3710 3711 return true; 3712 } 3713 3714 static bool 3715 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3716 struct ieee80211_link_data *link, 3717 const u8 *wmm_param, size_t wmm_param_len, 3718 const struct ieee80211_mu_edca_param_set *mu_edca) 3719 { 3720 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3721 mu_edca)) 3722 return false; 3723 3724 ieee80211_mgd_set_link_qos_params(link); 3725 3726 /* enable WMM or activate new settings */ 3727 link->conf->qos = true; 3728 return true; 3729 } 3730 3731 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3732 { 3733 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3734 3735 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3736 ieee80211_run_deferred_scan(sdata->local); 3737 } 3738 3739 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3740 { 3741 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3742 3743 __ieee80211_stop_poll(sdata); 3744 } 3745 3746 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3747 u16 capab, bool erp_valid, u8 erp) 3748 { 3749 struct ieee80211_bss_conf *bss_conf = link->conf; 3750 struct ieee80211_supported_band *sband; 3751 u64 changed = 0; 3752 bool use_protection; 3753 bool use_short_preamble; 3754 bool use_short_slot; 3755 3756 sband = ieee80211_get_link_sband(link); 3757 if (!sband) 3758 return changed; 3759 3760 if (erp_valid) { 3761 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3762 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3763 } else { 3764 use_protection = false; 3765 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3766 } 3767 3768 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3769 if (sband->band == NL80211_BAND_5GHZ || 3770 sband->band == NL80211_BAND_6GHZ) 3771 use_short_slot = true; 3772 3773 if (use_protection != bss_conf->use_cts_prot) { 3774 bss_conf->use_cts_prot = use_protection; 3775 changed |= BSS_CHANGED_ERP_CTS_PROT; 3776 } 3777 3778 if (use_short_preamble != bss_conf->use_short_preamble) { 3779 bss_conf->use_short_preamble = use_short_preamble; 3780 changed |= BSS_CHANGED_ERP_PREAMBLE; 3781 } 3782 3783 if (use_short_slot != bss_conf->use_short_slot) { 3784 bss_conf->use_short_slot = use_short_slot; 3785 changed |= BSS_CHANGED_ERP_SLOT; 3786 } 3787 3788 return changed; 3789 } 3790 3791 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3792 struct cfg80211_bss *cbss) 3793 { 3794 struct ieee80211_sub_if_data *sdata = link->sdata; 3795 struct ieee80211_bss_conf *bss_conf = link->conf; 3796 struct ieee80211_bss *bss = (void *)cbss->priv; 3797 u64 changed = BSS_CHANGED_QOS; 3798 3799 /* not really used in MLO */ 3800 sdata->u.mgd.beacon_timeout = 3801 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3802 bss_conf->beacon_int)); 3803 3804 changed |= ieee80211_handle_bss_capability(link, 3805 bss_conf->assoc_capability, 3806 bss->has_erp_value, 3807 bss->erp_value); 3808 3809 ieee80211_check_rate_mask(link); 3810 3811 link->conf->bss = cbss; 3812 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3813 3814 if (sdata->vif.p2p || 3815 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3816 const struct cfg80211_bss_ies *ies; 3817 3818 rcu_read_lock(); 3819 ies = rcu_dereference(cbss->ies); 3820 if (ies) { 3821 int ret; 3822 3823 ret = cfg80211_get_p2p_attr( 3824 ies->data, ies->len, 3825 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3826 (u8 *) &bss_conf->p2p_noa_attr, 3827 sizeof(bss_conf->p2p_noa_attr)); 3828 if (ret >= 2) { 3829 link->u.mgd.p2p_noa_index = 3830 bss_conf->p2p_noa_attr.index; 3831 changed |= BSS_CHANGED_P2P_PS; 3832 } 3833 } 3834 rcu_read_unlock(); 3835 } 3836 3837 if (link->u.mgd.have_beacon) { 3838 bss_conf->beacon_rate = bss->beacon_rate; 3839 changed |= BSS_CHANGED_BEACON_INFO; 3840 } else { 3841 bss_conf->beacon_rate = NULL; 3842 } 3843 3844 /* Tell the driver to monitor connection quality (if supported) */ 3845 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3846 bss_conf->cqm_rssi_thold) 3847 changed |= BSS_CHANGED_CQM; 3848 3849 return changed; 3850 } 3851 3852 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3853 struct ieee80211_mgd_assoc_data *assoc_data, 3854 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3855 { 3856 struct ieee80211_local *local = sdata->local; 3857 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3858 u64 vif_changed = BSS_CHANGED_ASSOC; 3859 unsigned int link_id; 3860 3861 lockdep_assert_wiphy(local->hw.wiphy); 3862 3863 sdata->u.mgd.associated = true; 3864 3865 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3866 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3867 struct ieee80211_link_data *link; 3868 3869 if (!cbss || 3870 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3871 continue; 3872 3873 if (ieee80211_vif_is_mld(&sdata->vif) && 3874 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3875 continue; 3876 3877 link = sdata_dereference(sdata->link[link_id], sdata); 3878 if (WARN_ON(!link)) 3879 return; 3880 3881 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3882 } 3883 3884 /* just to be sure */ 3885 ieee80211_stop_poll(sdata); 3886 3887 ieee80211_led_assoc(local, 1); 3888 3889 vif_cfg->assoc = 1; 3890 3891 /* Enable ARP filtering */ 3892 if (vif_cfg->arp_addr_cnt) 3893 vif_changed |= BSS_CHANGED_ARP_FILTER; 3894 3895 if (ieee80211_vif_is_mld(&sdata->vif)) { 3896 for (link_id = 0; 3897 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3898 link_id++) { 3899 struct ieee80211_link_data *link; 3900 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3901 3902 if (!cbss || 3903 !(BIT(link_id) & 3904 ieee80211_vif_usable_links(&sdata->vif)) || 3905 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3906 continue; 3907 3908 link = sdata_dereference(sdata->link[link_id], sdata); 3909 if (WARN_ON(!link)) 3910 return; 3911 3912 ieee80211_link_info_change_notify(sdata, link, 3913 changed[link_id]); 3914 3915 ieee80211_recalc_smps(sdata, link); 3916 } 3917 3918 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3919 } else { 3920 ieee80211_bss_info_change_notify(sdata, 3921 vif_changed | changed[0]); 3922 } 3923 3924 ieee80211_recalc_ps(local); 3925 3926 /* leave this here to not change ordering in non-MLO cases */ 3927 if (!ieee80211_vif_is_mld(&sdata->vif)) 3928 ieee80211_recalc_smps(sdata, &sdata->deflink); 3929 ieee80211_recalc_ps_vif(sdata); 3930 3931 netif_carrier_on(sdata->dev); 3932 } 3933 3934 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3935 { 3936 struct ieee80211_mgd_assoc_data *add_links_data = 3937 sdata->u.mgd.reconf.add_links_data; 3938 3939 if (!ieee80211_vif_is_mld(&sdata->vif) || 3940 !(sdata->u.mgd.reconf.added_links | 3941 sdata->u.mgd.reconf.removed_links)) 3942 return; 3943 3944 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3945 &sdata->u.mgd.reconf.wk); 3946 sdata->u.mgd.reconf.added_links = 0; 3947 sdata->u.mgd.reconf.removed_links = 0; 3948 sdata->u.mgd.reconf.dialog_token = 0; 3949 3950 if (add_links_data) { 3951 struct cfg80211_mlo_reconf_done_data done_data = {}; 3952 u8 link_id; 3953 3954 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3955 link_id++) 3956 done_data.links[link_id].bss = 3957 add_links_data->link[link_id].bss; 3958 3959 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 3960 3961 kfree(sdata->u.mgd.reconf.add_links_data); 3962 sdata->u.mgd.reconf.add_links_data = NULL; 3963 } 3964 } 3965 3966 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3967 u16 stype, u16 reason, bool tx, 3968 u8 *frame_buf) 3969 { 3970 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3971 struct ieee80211_local *local = sdata->local; 3972 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3973 unsigned int link_id; 3974 u64 changed = 0; 3975 struct ieee80211_prep_tx_info info = { 3976 .subtype = stype, 3977 .was_assoc = true, 3978 .link_id = ffs(sdata->vif.active_links) - 1, 3979 }; 3980 3981 lockdep_assert_wiphy(local->hw.wiphy); 3982 3983 if (WARN_ON(!ap_sta)) 3984 return; 3985 3986 if (WARN_ON_ONCE(tx && !frame_buf)) 3987 return; 3988 3989 if (WARN_ON(!ifmgd->associated)) 3990 return; 3991 3992 ieee80211_stop_poll(sdata); 3993 3994 ifmgd->associated = false; 3995 3996 if (tx) { 3997 bool tx_link_found = false; 3998 3999 for (link_id = 0; 4000 link_id < ARRAY_SIZE(sdata->link); 4001 link_id++) { 4002 struct ieee80211_link_data *link; 4003 4004 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4005 continue; 4006 4007 link = sdata_dereference(sdata->link[link_id], sdata); 4008 if (WARN_ON_ONCE(!link)) 4009 continue; 4010 4011 if (link->u.mgd.csa.blocked_tx) 4012 continue; 4013 4014 tx_link_found = true; 4015 break; 4016 } 4017 4018 tx = tx_link_found; 4019 } 4020 4021 /* other links will be destroyed */ 4022 sdata->deflink.conf->bss = NULL; 4023 sdata->deflink.conf->epcs_support = false; 4024 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 4025 4026 netif_carrier_off(sdata->dev); 4027 4028 /* 4029 * if we want to get out of ps before disassoc (why?) we have 4030 * to do it before sending disassoc, as otherwise the null-packet 4031 * won't be valid. 4032 */ 4033 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 4034 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 4035 ieee80211_hw_config(local, -1, IEEE80211_CONF_CHANGE_PS); 4036 } 4037 local->ps_sdata = NULL; 4038 4039 /* disable per-vif ps */ 4040 ieee80211_recalc_ps_vif(sdata); 4041 4042 /* make sure ongoing transmission finishes */ 4043 synchronize_net(); 4044 4045 /* 4046 * drop any frame before deauth/disassoc, this can be data or 4047 * management frame. Since we are disconnecting, we should not 4048 * insist sending these frames which can take time and delay 4049 * the disconnection and possible the roaming. 4050 */ 4051 ieee80211_flush_queues(local, sdata, true); 4052 4053 if (tx) { 4054 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4055 4056 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4057 sdata->vif.cfg.ap_addr, stype, 4058 reason, true, frame_buf); 4059 4060 /* flush out frame - make sure the deauth was actually sent */ 4061 ieee80211_flush_queues(local, sdata, false); 4062 4063 drv_mgd_complete_tx(sdata->local, sdata, &info); 4064 } else if (frame_buf) { 4065 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4066 sdata->vif.cfg.ap_addr, stype, 4067 reason, false, frame_buf); 4068 } 4069 4070 /* clear AP addr only after building the needed mgmt frames */ 4071 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4072 eth_zero_addr(sdata->vif.cfg.ap_addr); 4073 4074 sdata->vif.cfg.ssid_len = 0; 4075 4076 /* Remove TDLS peers */ 4077 __sta_info_flush(sdata, false, -1, ap_sta); 4078 4079 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4080 /* Only move the AP state */ 4081 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4082 } else { 4083 /* Remove AP peer */ 4084 sta_info_flush(sdata, -1); 4085 } 4086 4087 /* finally reset all BSS / config parameters */ 4088 if (!ieee80211_vif_is_mld(&sdata->vif)) 4089 changed |= ieee80211_reset_erp_info(sdata); 4090 4091 ieee80211_led_assoc(local, 0); 4092 changed |= BSS_CHANGED_ASSOC; 4093 sdata->vif.cfg.assoc = false; 4094 4095 sdata->deflink.u.mgd.p2p_noa_index = -1; 4096 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4097 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4098 4099 /* on the next assoc, re-program HT/VHT parameters */ 4100 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4101 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4102 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4103 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4104 4105 /* 4106 * reset MU-MIMO ownership and group data in default link, 4107 * if used, other links are destroyed 4108 */ 4109 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4110 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4111 memset(sdata->vif.bss_conf.mu_group.position, 0, 4112 sizeof(sdata->vif.bss_conf.mu_group.position)); 4113 if (!ieee80211_vif_is_mld(&sdata->vif)) 4114 changed |= BSS_CHANGED_MU_GROUPS; 4115 sdata->vif.bss_conf.mu_mimo_owner = false; 4116 4117 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4118 4119 timer_delete_sync(&local->dynamic_ps_timer); 4120 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4121 4122 /* Disable ARP filtering */ 4123 if (sdata->vif.cfg.arp_addr_cnt) 4124 changed |= BSS_CHANGED_ARP_FILTER; 4125 4126 sdata->vif.bss_conf.qos = false; 4127 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4128 changed |= BSS_CHANGED_QOS; 4129 /* The BSSID (not really interesting) and HT changed */ 4130 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4131 ieee80211_bss_info_change_notify(sdata, changed); 4132 } else { 4133 ieee80211_vif_cfg_change_notify(sdata, changed); 4134 } 4135 4136 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4137 /* 4138 * After notifying the driver about the disassoc, 4139 * remove the ap sta. 4140 */ 4141 sta_info_flush(sdata, -1); 4142 } 4143 4144 /* disassociated - set to defaults now */ 4145 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4146 4147 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4148 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4149 timer_delete_sync(&sdata->u.mgd.timer); 4150 4151 sdata->vif.bss_conf.dtim_period = 0; 4152 sdata->vif.bss_conf.beacon_rate = NULL; 4153 4154 sdata->deflink.u.mgd.have_beacon = false; 4155 sdata->deflink.u.mgd.tracking_signal_avg = false; 4156 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4157 4158 ifmgd->flags = 0; 4159 4160 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4161 struct ieee80211_link_data *link; 4162 4163 link = sdata_dereference(sdata->link[link_id], sdata); 4164 if (!link) 4165 continue; 4166 ieee80211_link_release_channel(link); 4167 } 4168 4169 sdata->vif.bss_conf.csa_active = false; 4170 sdata->deflink.u.mgd.csa.blocked_tx = false; 4171 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4172 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4173 ieee80211_vif_unblock_queues_csa(sdata); 4174 4175 /* existing TX TSPEC sessions no longer exist */ 4176 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4177 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4178 4179 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4180 sdata->vif.bss_conf.pwr_reduction = 0; 4181 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4182 4183 sdata->vif.cfg.eml_cap = 0; 4184 sdata->vif.cfg.eml_med_sync_delay = 0; 4185 sdata->vif.cfg.mld_capa_op = 0; 4186 4187 memset(&sdata->u.mgd.ttlm_info, 0, 4188 sizeof(sdata->u.mgd.ttlm_info)); 4189 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4190 4191 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4192 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4193 &ifmgd->neg_ttlm_timeout_work); 4194 4195 sdata->u.mgd.removed_links = 0; 4196 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4197 &sdata->u.mgd.ml_reconf_work); 4198 4199 wiphy_work_cancel(sdata->local->hw.wiphy, 4200 &ifmgd->teardown_ttlm_work); 4201 4202 /* if disconnection happens in the middle of the ML reconfiguration 4203 * flow, cfg80211 must called to release the BSS references obtained 4204 * when the flow started. 4205 */ 4206 ieee80211_ml_reconf_reset(sdata); 4207 4208 ieee80211_vif_set_links(sdata, 0, 0); 4209 4210 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4211 4212 ifmgd->epcs.enabled = false; 4213 ifmgd->epcs.dialog_token = 0; 4214 4215 memset(ifmgd->userspace_selectors, 0, 4216 sizeof(ifmgd->userspace_selectors)); 4217 } 4218 4219 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4220 { 4221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4222 struct ieee80211_local *local = sdata->local; 4223 4224 lockdep_assert_wiphy(local->hw.wiphy); 4225 4226 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4227 return; 4228 4229 __ieee80211_stop_poll(sdata); 4230 4231 ieee80211_recalc_ps(local); 4232 4233 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4234 return; 4235 4236 /* 4237 * We've received a probe response, but are not sure whether 4238 * we have or will be receiving any beacons or data, so let's 4239 * schedule the timers again, just in case. 4240 */ 4241 ieee80211_sta_reset_beacon_monitor(sdata); 4242 4243 mod_timer(&ifmgd->conn_mon_timer, 4244 round_jiffies_up(jiffies + 4245 IEEE80211_CONNECTION_IDLE_TIME)); 4246 } 4247 4248 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4249 struct ieee80211_hdr *hdr, 4250 u16 tx_time) 4251 { 4252 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4253 u16 tid; 4254 int ac; 4255 struct ieee80211_sta_tx_tspec *tx_tspec; 4256 unsigned long now = jiffies; 4257 4258 if (!ieee80211_is_data_qos(hdr->frame_control)) 4259 return; 4260 4261 tid = ieee80211_get_tid(hdr); 4262 ac = ieee80211_ac_from_tid(tid); 4263 tx_tspec = &ifmgd->tx_tspec[ac]; 4264 4265 if (likely(!tx_tspec->admitted_time)) 4266 return; 4267 4268 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4269 tx_tspec->consumed_tx_time = 0; 4270 tx_tspec->time_slice_start = now; 4271 4272 if (tx_tspec->downgraded) { 4273 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4274 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4275 &ifmgd->tx_tspec_wk, 0); 4276 } 4277 } 4278 4279 if (tx_tspec->downgraded) 4280 return; 4281 4282 tx_tspec->consumed_tx_time += tx_time; 4283 4284 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4285 tx_tspec->downgraded = true; 4286 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4287 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4288 &ifmgd->tx_tspec_wk, 0); 4289 } 4290 } 4291 4292 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4293 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4294 { 4295 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4296 4297 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4298 !sdata->u.mgd.probe_send_count) 4299 return; 4300 4301 if (ack) 4302 sdata->u.mgd.probe_send_count = 0; 4303 else 4304 sdata->u.mgd.nullfunc_failed = true; 4305 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4306 } 4307 4308 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4309 const u8 *src, const u8 *dst, 4310 const u8 *ssid, size_t ssid_len, 4311 struct ieee80211_channel *channel) 4312 { 4313 struct sk_buff *skb; 4314 4315 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4316 ssid, ssid_len, NULL, 0, 4317 IEEE80211_PROBE_FLAG_DIRECTED); 4318 if (skb) 4319 ieee80211_tx_skb(sdata, skb); 4320 } 4321 4322 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4323 { 4324 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4325 u8 *dst = sdata->vif.cfg.ap_addr; 4326 u8 unicast_limit = max(1, max_probe_tries - 3); 4327 struct sta_info *sta; 4328 4329 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4330 4331 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 4332 return; 4333 4334 /* 4335 * Try sending broadcast probe requests for the last three 4336 * probe requests after the first ones failed since some 4337 * buggy APs only support broadcast probe requests. 4338 */ 4339 if (ifmgd->probe_send_count >= unicast_limit) 4340 dst = NULL; 4341 4342 /* 4343 * When the hardware reports an accurate Tx ACK status, it's 4344 * better to send a nullfunc frame instead of a probe request, 4345 * as it will kick us off the AP quickly if we aren't associated 4346 * anymore. The timeout will be reset if the frame is ACKed by 4347 * the AP. 4348 */ 4349 ifmgd->probe_send_count++; 4350 4351 if (dst) { 4352 sta = sta_info_get(sdata, dst); 4353 if (!WARN_ON(!sta)) 4354 ieee80211_check_fast_rx(sta); 4355 } 4356 4357 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4358 ifmgd->nullfunc_failed = false; 4359 ieee80211_send_nullfunc(sdata->local, sdata, false); 4360 } else { 4361 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4362 sdata->vif.cfg.ssid, 4363 sdata->vif.cfg.ssid_len, 4364 sdata->deflink.conf->bss->channel); 4365 } 4366 4367 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4368 run_again(sdata, ifmgd->probe_timeout); 4369 } 4370 4371 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4372 bool beacon) 4373 { 4374 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4375 bool already = false; 4376 4377 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4378 4379 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 4380 return; 4381 4382 if (!ieee80211_sdata_running(sdata)) 4383 return; 4384 4385 if (!ifmgd->associated) 4386 return; 4387 4388 if (sdata->local->tmp_channel || sdata->local->scanning) 4389 return; 4390 4391 if (sdata->local->suspending) { 4392 /* reschedule after resume */ 4393 ieee80211_reset_ap_probe(sdata); 4394 return; 4395 } 4396 4397 if (beacon) { 4398 mlme_dbg_ratelimited(sdata, 4399 "detected beacon loss from AP (missed %d beacons) - probing\n", 4400 beacon_loss_count); 4401 4402 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4403 } 4404 4405 /* 4406 * The driver/our work has already reported this event or the 4407 * connection monitoring has kicked in and we have already sent 4408 * a probe request. Or maybe the AP died and the driver keeps 4409 * reporting until we disassociate... 4410 * 4411 * In either case we have to ignore the current call to this 4412 * function (except for setting the correct probe reason bit) 4413 * because otherwise we would reset the timer every time and 4414 * never check whether we received a probe response! 4415 */ 4416 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4417 already = true; 4418 4419 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4420 4421 if (already) 4422 return; 4423 4424 ieee80211_recalc_ps(sdata->local); 4425 4426 ifmgd->probe_send_count = 0; 4427 ieee80211_mgd_probe_ap_send(sdata); 4428 } 4429 4430 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4431 struct ieee80211_vif *vif) 4432 { 4433 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4434 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4435 struct cfg80211_bss *cbss; 4436 struct sk_buff *skb; 4437 const struct element *ssid; 4438 int ssid_len; 4439 4440 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4441 4442 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4443 ieee80211_vif_is_mld(&sdata->vif))) 4444 return NULL; 4445 4446 if (ifmgd->associated) 4447 cbss = sdata->deflink.conf->bss; 4448 else if (ifmgd->auth_data) 4449 cbss = ifmgd->auth_data->bss; 4450 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4451 cbss = ifmgd->assoc_data->link[0].bss; 4452 else 4453 return NULL; 4454 4455 rcu_read_lock(); 4456 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4457 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4458 "invalid SSID element (len=%d)", 4459 ssid ? ssid->datalen : -1)) 4460 ssid_len = 0; 4461 else 4462 ssid_len = ssid->datalen; 4463 4464 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4465 (u32) -1, cbss->channel, 4466 ssid->data, ssid_len, 4467 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4468 rcu_read_unlock(); 4469 4470 return skb; 4471 } 4472 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4473 4474 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4475 const u8 *buf, size_t len, bool tx, 4476 u16 reason, bool reconnect) 4477 { 4478 struct ieee80211_event event = { 4479 .type = MLME_EVENT, 4480 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4481 .u.mlme.reason = reason, 4482 }; 4483 4484 if (tx) 4485 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4486 else 4487 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4488 4489 drv_event_callback(sdata->local, sdata, &event); 4490 } 4491 4492 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4493 { 4494 struct ieee80211_local *local = sdata->local; 4495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4496 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4497 4498 lockdep_assert_wiphy(local->hw.wiphy); 4499 4500 if (!ifmgd->associated) 4501 return; 4502 4503 if (!ifmgd->driver_disconnect) { 4504 unsigned int link_id; 4505 4506 /* 4507 * AP is probably out of range (or not reachable for another 4508 * reason) so remove the bss structs for that AP. In the case 4509 * of multi-link, it's not clear that all of them really are 4510 * out of range, but if they weren't the driver likely would 4511 * have switched to just have a single link active? 4512 */ 4513 for (link_id = 0; 4514 link_id < ARRAY_SIZE(sdata->link); 4515 link_id++) { 4516 struct ieee80211_link_data *link; 4517 4518 link = sdata_dereference(sdata->link[link_id], sdata); 4519 if (!link || !link->conf->bss) 4520 continue; 4521 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4522 link->conf->bss = NULL; 4523 } 4524 } 4525 4526 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4527 ifmgd->driver_disconnect ? 4528 WLAN_REASON_DEAUTH_LEAVING : 4529 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4530 true, frame_buf); 4531 /* the other links will be destroyed */ 4532 sdata->vif.bss_conf.csa_active = false; 4533 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4534 sdata->deflink.u.mgd.csa.blocked_tx = false; 4535 ieee80211_vif_unblock_queues_csa(sdata); 4536 4537 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4538 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4539 ifmgd->reconnect); 4540 ifmgd->reconnect = false; 4541 } 4542 4543 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4544 struct wiphy_work *work) 4545 { 4546 struct ieee80211_sub_if_data *sdata = 4547 container_of(work, struct ieee80211_sub_if_data, 4548 u.mgd.beacon_connection_loss_work); 4549 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4550 4551 if (ifmgd->connection_loss) { 4552 sdata_info(sdata, "Connection to AP %pM lost\n", 4553 sdata->vif.cfg.ap_addr); 4554 __ieee80211_disconnect(sdata); 4555 ifmgd->connection_loss = false; 4556 } else if (ifmgd->driver_disconnect) { 4557 sdata_info(sdata, 4558 "Driver requested disconnection from AP %pM\n", 4559 sdata->vif.cfg.ap_addr); 4560 __ieee80211_disconnect(sdata); 4561 ifmgd->driver_disconnect = false; 4562 } else { 4563 if (ifmgd->associated) 4564 sdata->deflink.u.mgd.beacon_loss_count++; 4565 ieee80211_mgd_probe_ap(sdata, true); 4566 } 4567 } 4568 4569 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4570 struct wiphy_work *work) 4571 { 4572 struct ieee80211_sub_if_data *sdata = 4573 container_of(work, struct ieee80211_sub_if_data, 4574 u.mgd.csa_connection_drop_work); 4575 4576 __ieee80211_disconnect(sdata); 4577 } 4578 4579 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4580 { 4581 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4582 struct ieee80211_hw *hw = &sdata->local->hw; 4583 4584 trace_api_beacon_loss(sdata); 4585 4586 sdata->u.mgd.connection_loss = false; 4587 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4588 } 4589 EXPORT_SYMBOL(ieee80211_beacon_loss); 4590 4591 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4592 { 4593 struct ieee80211_sub_if_data *sdata; 4594 struct ieee80211_hw *hw; 4595 4596 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4597 4598 sdata = vif_to_sdata(vif); 4599 hw = &sdata->local->hw; 4600 4601 trace_api_connection_loss(sdata); 4602 4603 sdata->u.mgd.connection_loss = true; 4604 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4605 } 4606 EXPORT_SYMBOL(ieee80211_connection_loss); 4607 4608 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4609 { 4610 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4611 struct ieee80211_hw *hw = &sdata->local->hw; 4612 4613 trace_api_disconnect(sdata, reconnect); 4614 4615 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4616 return; 4617 4618 sdata->u.mgd.driver_disconnect = true; 4619 sdata->u.mgd.reconnect = reconnect; 4620 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4621 } 4622 EXPORT_SYMBOL(ieee80211_disconnect); 4623 4624 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4625 bool assoc) 4626 { 4627 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4628 4629 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4630 4631 sdata->u.mgd.auth_data = NULL; 4632 4633 if (!assoc) { 4634 /* 4635 * we are not authenticated yet, the only timer that could be 4636 * running is the timeout for the authentication response which 4637 * which is not relevant anymore. 4638 */ 4639 timer_delete_sync(&sdata->u.mgd.timer); 4640 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4641 4642 /* other links are destroyed */ 4643 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4644 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4645 BSS_CHANGED_BSSID); 4646 sdata->u.mgd.flags = 0; 4647 4648 ieee80211_link_release_channel(&sdata->deflink); 4649 ieee80211_vif_set_links(sdata, 0, 0); 4650 } 4651 4652 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4653 kfree(auth_data); 4654 } 4655 4656 enum assoc_status { 4657 ASSOC_SUCCESS, 4658 ASSOC_REJECTED, 4659 ASSOC_TIMEOUT, 4660 ASSOC_ABANDON, 4661 }; 4662 4663 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4664 enum assoc_status status) 4665 { 4666 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4667 4668 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4669 4670 sdata->u.mgd.assoc_data = NULL; 4671 4672 if (status != ASSOC_SUCCESS) { 4673 /* 4674 * we are not associated yet, the only timer that could be 4675 * running is the timeout for the association response which 4676 * which is not relevant anymore. 4677 */ 4678 timer_delete_sync(&sdata->u.mgd.timer); 4679 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4680 4681 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4682 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4683 BSS_CHANGED_BSSID); 4684 sdata->u.mgd.flags = 0; 4685 sdata->vif.bss_conf.mu_mimo_owner = false; 4686 4687 if (status != ASSOC_REJECTED) { 4688 struct cfg80211_assoc_failure data = { 4689 .timeout = status == ASSOC_TIMEOUT, 4690 }; 4691 int i; 4692 4693 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4694 ARRAY_SIZE(assoc_data->link)); 4695 4696 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4697 data.bss[i] = assoc_data->link[i].bss; 4698 4699 if (ieee80211_vif_is_mld(&sdata->vif)) 4700 data.ap_mld_addr = assoc_data->ap_addr; 4701 4702 cfg80211_assoc_failure(sdata->dev, &data); 4703 } 4704 4705 ieee80211_link_release_channel(&sdata->deflink); 4706 ieee80211_vif_set_links(sdata, 0, 0); 4707 } 4708 4709 kfree(assoc_data); 4710 } 4711 4712 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4713 struct ieee80211_mgmt *mgmt, size_t len) 4714 { 4715 struct ieee80211_local *local = sdata->local; 4716 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4717 const struct element *challenge; 4718 u8 *pos; 4719 u32 tx_flags = 0; 4720 struct ieee80211_prep_tx_info info = { 4721 .subtype = IEEE80211_STYPE_AUTH, 4722 .link_id = auth_data->link_id, 4723 }; 4724 4725 pos = mgmt->u.auth.variable; 4726 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4727 len - (pos - (u8 *)mgmt)); 4728 if (!challenge) 4729 return; 4730 auth_data->expected_transaction = 4; 4731 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4732 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4733 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4734 IEEE80211_TX_INTFL_MLME_CONN_TX; 4735 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4736 (void *)challenge, 4737 challenge->datalen + sizeof(*challenge), 4738 auth_data->ap_addr, auth_data->ap_addr, 4739 auth_data->key, auth_data->key_len, 4740 auth_data->key_idx, tx_flags); 4741 } 4742 4743 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4744 { 4745 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4746 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4747 struct sta_info *sta; 4748 4749 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4750 4751 sdata_info(sdata, "authenticated\n"); 4752 ifmgd->auth_data->done = true; 4753 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4754 ifmgd->auth_data->timeout_started = true; 4755 run_again(sdata, ifmgd->auth_data->timeout); 4756 4757 /* move station state to auth */ 4758 sta = sta_info_get(sdata, ap_addr); 4759 if (!sta) { 4760 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4761 return false; 4762 } 4763 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4764 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4765 return false; 4766 } 4767 4768 return true; 4769 } 4770 4771 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4772 struct ieee80211_mgmt *mgmt, size_t len) 4773 { 4774 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4775 u16 auth_alg, auth_transaction, status_code; 4776 struct ieee80211_event event = { 4777 .type = MLME_EVENT, 4778 .u.mlme.data = AUTH_EVENT, 4779 }; 4780 struct ieee80211_prep_tx_info info = { 4781 .subtype = IEEE80211_STYPE_AUTH, 4782 }; 4783 bool sae_need_confirm = false; 4784 4785 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4786 4787 if (len < 24 + 6) 4788 return; 4789 4790 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4791 return; 4792 4793 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4794 return; 4795 4796 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4797 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4798 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4799 4800 info.link_id = ifmgd->auth_data->link_id; 4801 4802 if (auth_alg != ifmgd->auth_data->algorithm || 4803 (auth_alg != WLAN_AUTH_SAE && 4804 auth_transaction != ifmgd->auth_data->expected_transaction) || 4805 (auth_alg == WLAN_AUTH_SAE && 4806 (auth_transaction < ifmgd->auth_data->expected_transaction || 4807 auth_transaction > 2))) { 4808 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4809 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4810 auth_transaction, 4811 ifmgd->auth_data->expected_transaction); 4812 goto notify_driver; 4813 } 4814 4815 if (status_code != WLAN_STATUS_SUCCESS) { 4816 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4817 4818 if (auth_alg == WLAN_AUTH_SAE && 4819 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4820 (auth_transaction == 1 && 4821 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4822 status_code == WLAN_STATUS_SAE_PK)))) { 4823 /* waiting for userspace now */ 4824 ifmgd->auth_data->waiting = true; 4825 ifmgd->auth_data->timeout = 4826 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4827 ifmgd->auth_data->timeout_started = true; 4828 run_again(sdata, ifmgd->auth_data->timeout); 4829 if (auth_transaction == 1) 4830 sae_need_confirm = true; 4831 goto notify_driver; 4832 } 4833 4834 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4835 mgmt->sa, status_code); 4836 ieee80211_destroy_auth_data(sdata, false); 4837 event.u.mlme.status = MLME_DENIED; 4838 event.u.mlme.reason = status_code; 4839 drv_event_callback(sdata->local, sdata, &event); 4840 goto notify_driver; 4841 } 4842 4843 switch (ifmgd->auth_data->algorithm) { 4844 case WLAN_AUTH_OPEN: 4845 case WLAN_AUTH_LEAP: 4846 case WLAN_AUTH_FT: 4847 case WLAN_AUTH_SAE: 4848 case WLAN_AUTH_FILS_SK: 4849 case WLAN_AUTH_FILS_SK_PFS: 4850 case WLAN_AUTH_FILS_PK: 4851 break; 4852 case WLAN_AUTH_SHARED_KEY: 4853 if (ifmgd->auth_data->expected_transaction != 4) { 4854 ieee80211_auth_challenge(sdata, mgmt, len); 4855 /* need another frame */ 4856 return; 4857 } 4858 break; 4859 default: 4860 WARN_ONCE(1, "invalid auth alg %d", 4861 ifmgd->auth_data->algorithm); 4862 goto notify_driver; 4863 } 4864 4865 event.u.mlme.status = MLME_SUCCESS; 4866 info.success = 1; 4867 drv_event_callback(sdata->local, sdata, &event); 4868 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4869 (auth_transaction == 2 && 4870 ifmgd->auth_data->expected_transaction == 2)) { 4871 if (!ieee80211_mark_sta_auth(sdata)) 4872 return; /* ignore frame -- wait for timeout */ 4873 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4874 auth_transaction == 1) { 4875 sae_need_confirm = true; 4876 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4877 auth_transaction == 2) { 4878 sdata_info(sdata, "SAE peer confirmed\n"); 4879 ifmgd->auth_data->peer_confirmed = true; 4880 } 4881 4882 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4883 notify_driver: 4884 if (!sae_need_confirm) 4885 drv_mgd_complete_tx(sdata->local, sdata, &info); 4886 } 4887 4888 #define case_WLAN(type) \ 4889 case WLAN_REASON_##type: return #type 4890 4891 const char *ieee80211_get_reason_code_string(u16 reason_code) 4892 { 4893 switch (reason_code) { 4894 case_WLAN(UNSPECIFIED); 4895 case_WLAN(PREV_AUTH_NOT_VALID); 4896 case_WLAN(DEAUTH_LEAVING); 4897 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4898 case_WLAN(DISASSOC_AP_BUSY); 4899 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4900 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4901 case_WLAN(DISASSOC_STA_HAS_LEFT); 4902 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4903 case_WLAN(DISASSOC_BAD_POWER); 4904 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4905 case_WLAN(INVALID_IE); 4906 case_WLAN(MIC_FAILURE); 4907 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4908 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4909 case_WLAN(IE_DIFFERENT); 4910 case_WLAN(INVALID_GROUP_CIPHER); 4911 case_WLAN(INVALID_PAIRWISE_CIPHER); 4912 case_WLAN(INVALID_AKMP); 4913 case_WLAN(UNSUPP_RSN_VERSION); 4914 case_WLAN(INVALID_RSN_IE_CAP); 4915 case_WLAN(IEEE8021X_FAILED); 4916 case_WLAN(CIPHER_SUITE_REJECTED); 4917 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4918 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4919 case_WLAN(DISASSOC_LOW_ACK); 4920 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4921 case_WLAN(QSTA_LEAVE_QBSS); 4922 case_WLAN(QSTA_NOT_USE); 4923 case_WLAN(QSTA_REQUIRE_SETUP); 4924 case_WLAN(QSTA_TIMEOUT); 4925 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4926 case_WLAN(MESH_PEER_CANCELED); 4927 case_WLAN(MESH_MAX_PEERS); 4928 case_WLAN(MESH_CONFIG); 4929 case_WLAN(MESH_CLOSE); 4930 case_WLAN(MESH_MAX_RETRIES); 4931 case_WLAN(MESH_CONFIRM_TIMEOUT); 4932 case_WLAN(MESH_INVALID_GTK); 4933 case_WLAN(MESH_INCONSISTENT_PARAM); 4934 case_WLAN(MESH_INVALID_SECURITY); 4935 case_WLAN(MESH_PATH_ERROR); 4936 case_WLAN(MESH_PATH_NOFORWARD); 4937 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4938 case_WLAN(MAC_EXISTS_IN_MBSS); 4939 case_WLAN(MESH_CHAN_REGULATORY); 4940 case_WLAN(MESH_CHAN); 4941 default: return "<unknown>"; 4942 } 4943 } 4944 4945 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4946 struct ieee80211_mgmt *mgmt, size_t len) 4947 { 4948 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4949 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4950 4951 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4952 4953 if (len < 24 + 2) 4954 return; 4955 4956 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4957 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4958 return; 4959 } 4960 4961 if (ifmgd->associated && 4962 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4963 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4964 sdata->vif.cfg.ap_addr, reason_code, 4965 ieee80211_get_reason_code_string(reason_code)); 4966 4967 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4968 4969 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4970 reason_code, false); 4971 return; 4972 } 4973 4974 if (ifmgd->assoc_data && 4975 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4976 sdata_info(sdata, 4977 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4978 ifmgd->assoc_data->ap_addr, reason_code, 4979 ieee80211_get_reason_code_string(reason_code)); 4980 4981 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4982 4983 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4984 return; 4985 } 4986 } 4987 4988 4989 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4990 struct ieee80211_mgmt *mgmt, size_t len) 4991 { 4992 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4993 u16 reason_code; 4994 4995 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4996 4997 if (len < 24 + 2) 4998 return; 4999 5000 if (!ifmgd->associated || 5001 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 5002 return; 5003 5004 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 5005 5006 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 5007 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 5008 return; 5009 } 5010 5011 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 5012 sdata->vif.cfg.ap_addr, reason_code, 5013 ieee80211_get_reason_code_string(reason_code)); 5014 5015 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 5016 5017 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 5018 false); 5019 } 5020 5021 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 5022 struct ieee80211_supported_band *sband, 5023 const struct link_sta_info *link_sta, 5024 const struct ieee802_11_elems *elems) 5025 { 5026 const struct ieee80211_sta_he_cap *own_he_cap = 5027 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5028 5029 if (elems->ext_capab_len < 10) 5030 return false; 5031 5032 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 5033 return false; 5034 5035 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 5036 IEEE80211_HE_MAC_CAP0_TWT_RES && 5037 own_he_cap && 5038 (own_he_cap->he_cap_elem.mac_cap_info[0] & 5039 IEEE80211_HE_MAC_CAP0_TWT_REQ); 5040 } 5041 5042 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 5043 struct ieee80211_supported_band *sband, 5044 struct ieee80211_link_data *link, 5045 struct link_sta_info *link_sta, 5046 struct ieee802_11_elems *elems) 5047 { 5048 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 5049 5050 if (link->conf->twt_requester != twt) { 5051 link->conf->twt_requester = twt; 5052 return BSS_CHANGED_TWT; 5053 } 5054 return 0; 5055 } 5056 5057 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5058 struct ieee80211_bss_conf *bss_conf, 5059 struct ieee80211_supported_band *sband, 5060 struct link_sta_info *link_sta) 5061 { 5062 const struct ieee80211_sta_he_cap *own_he_cap = 5063 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5064 5065 return bss_conf->he_support && 5066 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5067 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5068 own_he_cap && 5069 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5070 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5071 } 5072 5073 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5074 bool enabled) 5075 { 5076 /* in any case this is called, dialog token should be reset */ 5077 sdata->u.mgd.epcs.dialog_token = 0; 5078 5079 if (sdata->u.mgd.epcs.enabled == enabled) 5080 return; 5081 5082 sdata->u.mgd.epcs.enabled = enabled; 5083 cfg80211_epcs_changed(sdata->dev, enabled); 5084 } 5085 5086 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5087 { 5088 struct ieee80211_local *local = sdata->local; 5089 u8 link_id; 5090 5091 if (!sdata->u.mgd.epcs.enabled) 5092 return; 5093 5094 lockdep_assert_wiphy(local->hw.wiphy); 5095 5096 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5097 struct ieee802_11_elems *elems; 5098 struct ieee80211_link_data *link; 5099 const struct cfg80211_bss_ies *ies; 5100 bool ret; 5101 5102 rcu_read_lock(); 5103 5104 link = sdata_dereference(sdata->link[link_id], sdata); 5105 if (!link || !link->conf || !link->conf->bss) { 5106 rcu_read_unlock(); 5107 continue; 5108 } 5109 5110 if (link->u.mgd.disable_wmm_tracking) { 5111 rcu_read_unlock(); 5112 ieee80211_set_wmm_default(link, false, false); 5113 continue; 5114 } 5115 5116 ies = rcu_dereference(link->conf->bss->beacon_ies); 5117 if (!ies) { 5118 rcu_read_unlock(); 5119 ieee80211_set_wmm_default(link, false, false); 5120 continue; 5121 } 5122 5123 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5124 NULL); 5125 if (!elems) { 5126 rcu_read_unlock(); 5127 ieee80211_set_wmm_default(link, false, false); 5128 continue; 5129 } 5130 5131 ret = _ieee80211_sta_wmm_params(local, link, 5132 elems->wmm_param, 5133 elems->wmm_param_len, 5134 elems->mu_edca_param_set); 5135 5136 kfree(elems); 5137 rcu_read_unlock(); 5138 5139 if (!ret) { 5140 ieee80211_set_wmm_default(link, false, false); 5141 continue; 5142 } 5143 5144 ieee80211_mgd_set_link_qos_params(link); 5145 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5146 } 5147 } 5148 5149 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5150 struct link_sta_info *link_sta, 5151 struct cfg80211_bss *cbss, 5152 struct ieee80211_mgmt *mgmt, 5153 const u8 *elem_start, 5154 unsigned int elem_len, 5155 u64 *changed) 5156 { 5157 struct ieee80211_sub_if_data *sdata = link->sdata; 5158 struct ieee80211_mgd_assoc_data *assoc_data = 5159 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5160 struct ieee80211_bss_conf *bss_conf = link->conf; 5161 struct ieee80211_local *local = sdata->local; 5162 unsigned int link_id = link->link_id; 5163 struct ieee80211_elems_parse_params parse_params = { 5164 .mode = link->u.mgd.conn.mode, 5165 .start = elem_start, 5166 .len = elem_len, 5167 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5168 .from_ap = true, 5169 }; 5170 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5171 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5172 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5173 const struct cfg80211_bss_ies *bss_ies = NULL; 5174 struct ieee80211_supported_band *sband; 5175 struct ieee802_11_elems *elems; 5176 const __le16 prof_bss_param_ch_present = 5177 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5178 u16 capab_info; 5179 bool ret; 5180 5181 elems = ieee802_11_parse_elems_full(&parse_params); 5182 if (!elems) 5183 return false; 5184 5185 if (link_id == assoc_data->assoc_link_id) { 5186 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5187 5188 /* 5189 * we should not get to this flow unless the association was 5190 * successful, so set the status directly to success 5191 */ 5192 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5193 if (elems->ml_basic) { 5194 int bss_param_ch_cnt = 5195 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5196 5197 if (bss_param_ch_cnt < 0) { 5198 ret = false; 5199 goto out; 5200 } 5201 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5202 bss_conf->bss_param_ch_cnt_link_id = link_id; 5203 } 5204 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5205 !elems->prof || 5206 !(elems->prof->control & prof_bss_param_ch_present)) { 5207 ret = false; 5208 goto out; 5209 } else { 5210 const u8 *ptr = elems->prof->variable + 5211 elems->prof->sta_info_len - 1; 5212 int bss_param_ch_cnt; 5213 5214 /* 5215 * During parsing, we validated that these fields exist, 5216 * otherwise elems->prof would have been set to NULL. 5217 */ 5218 capab_info = get_unaligned_le16(ptr); 5219 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5220 bss_param_ch_cnt = 5221 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5222 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5223 bss_conf->bss_param_ch_cnt_link_id = link_id; 5224 5225 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5226 link_info(link, "association response status code=%u\n", 5227 assoc_data->link[link_id].status); 5228 ret = true; 5229 goto out; 5230 } 5231 } 5232 5233 if (!is_s1g && !elems->supp_rates) { 5234 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5235 ret = false; 5236 goto out; 5237 } 5238 5239 link->u.mgd.tdls_chan_switch_prohibited = 5240 elems->ext_capab && elems->ext_capab_len >= 5 && 5241 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5242 5243 /* 5244 * Some APs are erroneously not including some information in their 5245 * (re)association response frames. Try to recover by using the data 5246 * from the beacon or probe response. This seems to afflict mobile 5247 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5248 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5249 */ 5250 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5251 ((assoc_data->wmm && !elems->wmm_param) || 5252 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5253 (!elems->ht_cap_elem || !elems->ht_operation)) || 5254 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5255 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5256 const struct cfg80211_bss_ies *ies; 5257 struct ieee802_11_elems *bss_elems; 5258 5259 rcu_read_lock(); 5260 ies = rcu_dereference(cbss->ies); 5261 if (ies) 5262 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5263 GFP_ATOMIC); 5264 rcu_read_unlock(); 5265 if (!bss_ies) { 5266 ret = false; 5267 goto out; 5268 } 5269 5270 parse_params.start = bss_ies->data; 5271 parse_params.len = bss_ies->len; 5272 parse_params.bss = cbss; 5273 parse_params.link_id = -1; 5274 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5275 if (!bss_elems) { 5276 ret = false; 5277 goto out; 5278 } 5279 5280 if (assoc_data->wmm && 5281 !elems->wmm_param && bss_elems->wmm_param) { 5282 elems->wmm_param = bss_elems->wmm_param; 5283 sdata_info(sdata, 5284 "AP bug: WMM param missing from AssocResp\n"); 5285 } 5286 5287 /* 5288 * Also check if we requested HT/VHT, otherwise the AP doesn't 5289 * have to include the IEs in the (re)association response. 5290 */ 5291 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5292 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5293 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5294 sdata_info(sdata, 5295 "AP bug: HT capability missing from AssocResp\n"); 5296 } 5297 if (!elems->ht_operation && bss_elems->ht_operation && 5298 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5299 elems->ht_operation = bss_elems->ht_operation; 5300 sdata_info(sdata, 5301 "AP bug: HT operation missing from AssocResp\n"); 5302 } 5303 5304 if (is_5ghz) { 5305 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5306 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5307 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5308 sdata_info(sdata, 5309 "AP bug: VHT capa missing from AssocResp\n"); 5310 } 5311 5312 if (!elems->vht_operation && bss_elems->vht_operation && 5313 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5314 elems->vht_operation = bss_elems->vht_operation; 5315 sdata_info(sdata, 5316 "AP bug: VHT operation missing from AssocResp\n"); 5317 } 5318 } 5319 kfree(bss_elems); 5320 } 5321 5322 /* 5323 * We previously checked these in the beacon/probe response, so 5324 * they should be present here. This is just a safety net. 5325 * Note that the ieee80211_config_bw() below would also check 5326 * for this (and more), but this has better error reporting. 5327 */ 5328 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5329 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5330 sdata_info(sdata, 5331 "HT AP is missing WMM params or HT capability/operation\n"); 5332 ret = false; 5333 goto out; 5334 } 5335 5336 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5337 (!elems->vht_cap_elem || !elems->vht_operation)) { 5338 sdata_info(sdata, 5339 "VHT AP is missing VHT capability/operation\n"); 5340 ret = false; 5341 goto out; 5342 } 5343 5344 /* check/update if AP changed anything in assoc response vs. scan */ 5345 if (ieee80211_config_bw(link, elems, 5346 link_id == assoc_data->assoc_link_id, 5347 changed, "assoc response")) { 5348 ret = false; 5349 goto out; 5350 } 5351 5352 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5353 ret = false; 5354 goto out; 5355 } 5356 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5357 5358 /* Set up internal HT/VHT capabilities */ 5359 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5360 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5361 elems->ht_cap_elem, 5362 link_sta); 5363 5364 if (elems->vht_cap_elem && 5365 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5366 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5367 const struct cfg80211_bss_ies *ies; 5368 5369 /* 5370 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5371 * too large maximum MPDU length in the association response 5372 * (indicating 12k) that it cannot actually process ... 5373 * Work around that. 5374 */ 5375 rcu_read_lock(); 5376 ies = rcu_dereference(cbss->ies); 5377 if (ies) { 5378 const struct element *elem; 5379 5380 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5381 ies->data, ies->len); 5382 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5383 bss_vht_cap = (const void *)elem->data; 5384 } 5385 5386 if (ieee80211_hw_check(&local->hw, STRICT) && 5387 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5388 sizeof(*bss_vht_cap)))) { 5389 rcu_read_unlock(); 5390 ret = false; 5391 link_info(link, "VHT capabilities mismatch\n"); 5392 goto out; 5393 } 5394 5395 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5396 elems->vht_cap_elem, 5397 bss_vht_cap, link_sta); 5398 rcu_read_unlock(); 5399 } 5400 5401 if (elems->he_operation && 5402 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5403 elems->he_cap) { 5404 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5405 elems->he_cap, 5406 elems->he_cap_len, 5407 elems->he_6ghz_capa, 5408 link_sta); 5409 5410 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5411 if (elems->rsnx && elems->rsnx_len && 5412 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5413 wiphy_ext_feature_isset(local->hw.wiphy, 5414 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5415 bss_conf->twt_protected = true; 5416 else 5417 bss_conf->twt_protected = false; 5418 5419 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5420 link_sta, elems); 5421 5422 if (elems->eht_operation && elems->eht_cap && 5423 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5424 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5425 elems->he_cap, 5426 elems->he_cap_len, 5427 elems->eht_cap, 5428 elems->eht_cap_len, 5429 link_sta); 5430 5431 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5432 bss_conf->epcs_support = bss_conf->eht_support && 5433 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5434 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5435 5436 /* EPCS might be already enabled but a new added link 5437 * does not support EPCS. This should not really happen 5438 * in practice. 5439 */ 5440 if (sdata->u.mgd.epcs.enabled && 5441 !bss_conf->epcs_support) 5442 ieee80211_epcs_teardown(sdata); 5443 } else { 5444 bss_conf->eht_support = false; 5445 bss_conf->epcs_support = false; 5446 } 5447 } else { 5448 bss_conf->he_support = false; 5449 bss_conf->twt_requester = false; 5450 bss_conf->twt_protected = false; 5451 bss_conf->eht_support = false; 5452 bss_conf->epcs_support = false; 5453 } 5454 5455 if (elems->s1g_oper && 5456 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G && 5457 elems->s1g_capab) 5458 ieee80211_s1g_cap_to_sta_s1g_cap(sdata, elems->s1g_capab, 5459 link_sta); 5460 5461 bss_conf->twt_broadcast = 5462 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5463 5464 if (bss_conf->he_support) { 5465 bss_conf->he_bss_color.color = 5466 le32_get_bits(elems->he_operation->he_oper_params, 5467 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5468 bss_conf->he_bss_color.partial = 5469 le32_get_bits(elems->he_operation->he_oper_params, 5470 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5471 bss_conf->he_bss_color.enabled = 5472 !le32_get_bits(elems->he_operation->he_oper_params, 5473 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5474 5475 if (bss_conf->he_bss_color.enabled) 5476 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5477 5478 bss_conf->htc_trig_based_pkt_ext = 5479 le32_get_bits(elems->he_operation->he_oper_params, 5480 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5481 bss_conf->frame_time_rts_th = 5482 le32_get_bits(elems->he_operation->he_oper_params, 5483 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5484 5485 bss_conf->uora_exists = !!elems->uora_element; 5486 if (elems->uora_element) 5487 bss_conf->uora_ocw_range = elems->uora_element[0]; 5488 5489 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5490 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5491 /* TODO: OPEN: what happens if BSS color disable is set? */ 5492 } 5493 5494 if (cbss->transmitted_bss) { 5495 bss_conf->nontransmitted = true; 5496 ether_addr_copy(bss_conf->transmitter_bssid, 5497 cbss->transmitted_bss->bssid); 5498 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5499 bss_conf->bssid_index = cbss->bssid_index; 5500 } 5501 5502 /* 5503 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5504 * in their association response, so ignore that data for our own 5505 * configuration. If it changed since the last beacon, we'll get the 5506 * next beacon and update then. 5507 */ 5508 5509 /* 5510 * If an operating mode notification IE is present, override the 5511 * NSS calculation (that would be done in rate_control_rate_init()) 5512 * and use the # of streams from that element. 5513 */ 5514 if (elems->opmode_notif && 5515 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5516 u8 nss; 5517 5518 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5519 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5520 nss += 1; 5521 link_sta->pub->rx_nss = nss; 5522 } 5523 5524 /* 5525 * Always handle WMM once after association regardless 5526 * of the first value the AP uses. Setting -1 here has 5527 * that effect because the AP values is an unsigned 5528 * 4-bit value. 5529 */ 5530 link->u.mgd.wmm_last_param_set = -1; 5531 link->u.mgd.mu_edca_last_param_set = -1; 5532 5533 if (link->u.mgd.disable_wmm_tracking) { 5534 ieee80211_set_wmm_default(link, false, false); 5535 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5536 elems->wmm_param_len, 5537 elems->mu_edca_param_set)) { 5538 /* still enable QoS since we might have HT/VHT */ 5539 ieee80211_set_wmm_default(link, false, true); 5540 /* disable WMM tracking in this case to disable 5541 * tracking WMM parameter changes in the beacon if 5542 * the parameters weren't actually valid. Doing so 5543 * avoids changing parameters very strangely when 5544 * the AP is going back and forth between valid and 5545 * invalid parameters. 5546 */ 5547 link->u.mgd.disable_wmm_tracking = true; 5548 } 5549 5550 if (elems->max_idle_period_ie) { 5551 bss_conf->max_idle_period = 5552 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5553 bss_conf->protected_keep_alive = 5554 !!(elems->max_idle_period_ie->idle_options & 5555 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5556 *changed |= BSS_CHANGED_KEEP_ALIVE; 5557 } else { 5558 bss_conf->max_idle_period = 0; 5559 bss_conf->protected_keep_alive = false; 5560 } 5561 5562 /* set assoc capability (AID was already set earlier), 5563 * ieee80211_set_associated() will tell the driver */ 5564 bss_conf->assoc_capability = capab_info; 5565 5566 ret = true; 5567 out: 5568 kfree(elems); 5569 kfree(bss_ies); 5570 return ret; 5571 } 5572 5573 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5574 struct sta_info *sta, 5575 struct link_sta_info *link_sta, 5576 struct cfg80211_bss *cbss) 5577 { 5578 struct ieee80211_sub_if_data *sdata = link->sdata; 5579 struct ieee80211_local *local = sdata->local; 5580 struct ieee80211_bss *bss = (void *)cbss->priv; 5581 u32 rates = 0, basic_rates = 0; 5582 bool have_higher_than_11mbit = false; 5583 int min_rate = INT_MAX, min_rate_index = -1; 5584 struct ieee80211_supported_band *sband; 5585 5586 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5587 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5588 5589 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5590 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5591 ieee80211_s1g_sta_rate_init(sta); 5592 return 0; 5593 } 5594 5595 sband = local->hw.wiphy->bands[cbss->channel->band]; 5596 5597 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5598 NULL, 0, 5599 &rates, &basic_rates, NULL, 5600 &have_higher_than_11mbit, 5601 &min_rate, &min_rate_index); 5602 5603 /* 5604 * This used to be a workaround for basic rates missing 5605 * in the association response frame. Now that we no 5606 * longer use the basic rates from there, it probably 5607 * doesn't happen any more, but keep the workaround so 5608 * in case some *other* APs are buggy in different ways 5609 * we can connect -- with a warning. 5610 * Allow this workaround only in case the AP provided at least 5611 * one rate. 5612 */ 5613 if (min_rate_index < 0) { 5614 link_info(link, "No legacy rates in association response\n"); 5615 return -EINVAL; 5616 } else if (!basic_rates) { 5617 link_info(link, "No basic rates, using min rate instead\n"); 5618 basic_rates = BIT(min_rate_index); 5619 } 5620 5621 if (rates) 5622 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5623 else 5624 link_info(link, "No rates found, keeping mandatory only\n"); 5625 5626 link->conf->basic_rates = basic_rates; 5627 5628 /* cf. IEEE 802.11 9.2.12 */ 5629 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5630 have_higher_than_11mbit; 5631 5632 return 0; 5633 } 5634 5635 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5636 struct cfg80211_bss *cbss) 5637 { 5638 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5639 const struct element *ht_cap_elem, *vht_cap_elem; 5640 const struct cfg80211_bss_ies *ies; 5641 const struct ieee80211_ht_cap *ht_cap; 5642 const struct ieee80211_vht_cap *vht_cap; 5643 const struct ieee80211_he_cap_elem *he_cap; 5644 const struct element *he_cap_elem; 5645 u16 mcs_80_map, mcs_160_map; 5646 int i, mcs_nss_size; 5647 bool support_160; 5648 u8 chains = 1; 5649 5650 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5651 return chains; 5652 5653 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5654 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5655 ht_cap = (void *)ht_cap_elem->data; 5656 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5657 /* 5658 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5659 * "Tx Unequal Modulation Supported" fields. 5660 */ 5661 } 5662 5663 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5664 return chains; 5665 5666 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5667 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5668 u8 nss; 5669 u16 tx_mcs_map; 5670 5671 vht_cap = (void *)vht_cap_elem->data; 5672 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5673 for (nss = 8; nss > 0; nss--) { 5674 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5675 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5676 break; 5677 } 5678 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5679 chains = max(chains, nss); 5680 } 5681 5682 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5683 return chains; 5684 5685 ies = rcu_dereference(cbss->ies); 5686 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5687 ies->data, ies->len); 5688 5689 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5690 return chains; 5691 5692 /* skip one byte ext_tag_id */ 5693 he_cap = (void *)(he_cap_elem->data + 1); 5694 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5695 5696 /* invalid HE IE */ 5697 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5698 return chains; 5699 5700 /* mcs_nss is right after he_cap info */ 5701 he_mcs_nss_supp = (void *)(he_cap + 1); 5702 5703 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5704 5705 for (i = 7; i >= 0; i--) { 5706 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5707 5708 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5709 chains = max_t(u8, chains, i + 1); 5710 break; 5711 } 5712 } 5713 5714 support_160 = he_cap->phy_cap_info[0] & 5715 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5716 5717 if (!support_160) 5718 return chains; 5719 5720 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5721 for (i = 7; i >= 0; i--) { 5722 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5723 5724 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5725 chains = max_t(u8, chains, i + 1); 5726 break; 5727 } 5728 } 5729 5730 return chains; 5731 } 5732 5733 static void 5734 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5735 struct ieee80211_supported_band *sband, 5736 struct cfg80211_assoc_request *req, 5737 bool wmm_used, int link_id, 5738 struct ieee80211_conn_settings *conn) 5739 { 5740 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5741 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5742 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5743 const struct ieee80211_sta_he_cap *he_cap; 5744 const struct ieee80211_sta_eht_cap *eht_cap; 5745 struct ieee80211_sta_vht_cap vht_cap; 5746 5747 if (sband->band == NL80211_BAND_S1GHZ) { 5748 conn->mode = IEEE80211_CONN_MODE_S1G; 5749 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5750 mlme_dbg(sdata, "operating as S1G STA\n"); 5751 return; 5752 } 5753 5754 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5755 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5756 5757 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5758 5759 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5760 mlme_link_id_dbg(sdata, link_id, 5761 "HT disabled by flag, limiting to legacy\n"); 5762 goto out; 5763 } 5764 5765 if (!wmm_used) { 5766 mlme_link_id_dbg(sdata, link_id, 5767 "WMM/QoS not supported, limiting to legacy\n"); 5768 goto out; 5769 } 5770 5771 if (req) { 5772 unsigned int i; 5773 5774 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5775 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5776 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5777 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5778 netdev_info(sdata->dev, 5779 "WEP/TKIP use, limiting to legacy\n"); 5780 goto out; 5781 } 5782 } 5783 } 5784 5785 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5786 mlme_link_id_dbg(sdata, link_id, 5787 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5788 goto out; 5789 } 5790 5791 /* HT is fine */ 5792 conn->mode = IEEE80211_CONN_MODE_HT; 5793 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5794 IEEE80211_CONN_BW_LIMIT_40 : 5795 IEEE80211_CONN_BW_LIMIT_20; 5796 5797 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5798 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5799 5800 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5801 mlme_link_id_dbg(sdata, link_id, 5802 "VHT disabled by flag, limiting to HT\n"); 5803 goto out; 5804 } 5805 5806 if (vht_cap.vht_supported && is_5ghz) { 5807 bool have_80mhz = false; 5808 unsigned int i; 5809 5810 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5811 mlme_link_id_dbg(sdata, link_id, 5812 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5813 goto out; 5814 } 5815 5816 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5817 for (i = 0; i < sband->n_channels; i++) { 5818 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5819 IEEE80211_CHAN_NO_80MHZ)) 5820 continue; 5821 5822 have_80mhz = true; 5823 break; 5824 } 5825 5826 if (!have_80mhz) { 5827 mlme_link_id_dbg(sdata, link_id, 5828 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5829 goto out; 5830 } 5831 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5832 mlme_link_id_dbg(sdata, link_id, 5833 "no VHT support on 5 GHz, limiting to HT\n"); 5834 goto out; 5835 } 5836 5837 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5838 if (sband->band != NL80211_BAND_2GHZ) { 5839 conn->mode = IEEE80211_CONN_MODE_VHT; 5840 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5841 } 5842 5843 if (is_5ghz && 5844 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5845 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5846 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5847 mlme_link_id_dbg(sdata, link_id, 5848 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5849 } 5850 5851 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5852 mlme_link_id_dbg(sdata, link_id, 5853 "HE disabled by flag, limiting to HT/VHT\n"); 5854 goto out; 5855 } 5856 5857 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5858 if (!he_cap) { 5859 WARN_ON(is_6ghz); 5860 mlme_link_id_dbg(sdata, link_id, 5861 "no HE support, limiting to HT/VHT\n"); 5862 goto out; 5863 } 5864 5865 /* so we have HE */ 5866 conn->mode = IEEE80211_CONN_MODE_HE; 5867 5868 /* check bandwidth */ 5869 switch (sband->band) { 5870 default: 5871 case NL80211_BAND_2GHZ: 5872 if (he_cap->he_cap_elem.phy_cap_info[0] & 5873 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5874 break; 5875 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5876 mlme_link_id_dbg(sdata, link_id, 5877 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5878 break; 5879 case NL80211_BAND_5GHZ: 5880 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5881 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5882 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5883 mlme_link_id_dbg(sdata, link_id, 5884 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5885 break; 5886 } 5887 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5888 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5889 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5890 conn->bw_limit, 5891 IEEE80211_CONN_BW_LIMIT_80); 5892 mlme_link_id_dbg(sdata, link_id, 5893 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5894 } 5895 break; 5896 case NL80211_BAND_6GHZ: 5897 if (he_cap->he_cap_elem.phy_cap_info[0] & 5898 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5899 break; 5900 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5901 conn->bw_limit, 5902 IEEE80211_CONN_BW_LIMIT_80); 5903 mlme_link_id_dbg(sdata, link_id, 5904 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5905 break; 5906 } 5907 5908 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5909 mlme_link_id_dbg(sdata, link_id, 5910 "EHT disabled by flag, limiting to HE\n"); 5911 goto out; 5912 } 5913 5914 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5915 if (!eht_cap) { 5916 mlme_link_id_dbg(sdata, link_id, 5917 "no EHT support, limiting to HE\n"); 5918 goto out; 5919 } 5920 5921 /* we have EHT */ 5922 5923 conn->mode = IEEE80211_CONN_MODE_EHT; 5924 5925 /* check bandwidth */ 5926 if (is_6ghz && 5927 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5928 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5929 else if (is_6ghz) 5930 mlme_link_id_dbg(sdata, link_id, 5931 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5932 5933 out: 5934 mlme_link_id_dbg(sdata, link_id, 5935 "determined local STA to be %s, BW limited to %d MHz\n", 5936 ieee80211_conn_mode_str(conn->mode), 5937 20 * (1 << conn->bw_limit)); 5938 } 5939 5940 static void 5941 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5942 struct ieee80211_supported_band *sband, 5943 struct cfg80211_auth_request *req, 5944 bool wmm_used, 5945 struct ieee80211_conn_settings *conn) 5946 { 5947 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5948 req->link_id > 0 ? req->link_id : 0, 5949 conn); 5950 } 5951 5952 static void 5953 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5954 struct ieee80211_supported_band *sband, 5955 struct cfg80211_assoc_request *req, 5956 bool wmm_used, int link_id, 5957 struct ieee80211_conn_settings *conn) 5958 { 5959 struct ieee80211_conn_settings tmp; 5960 5961 WARN_ON(!req); 5962 5963 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5964 &tmp); 5965 5966 conn->mode = min_t(enum ieee80211_conn_mode, 5967 conn->mode, tmp.mode); 5968 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5969 conn->bw_limit, tmp.bw_limit); 5970 } 5971 5972 static enum ieee80211_ap_reg_power 5973 ieee80211_ap_power_type(u8 control) 5974 { 5975 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5976 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5977 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5978 return IEEE80211_REG_LPI_AP; 5979 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5980 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5981 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP_OLD: 5982 return IEEE80211_REG_SP_AP; 5983 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5984 return IEEE80211_REG_VLP_AP; 5985 default: 5986 return IEEE80211_REG_UNSET_AP; 5987 } 5988 } 5989 5990 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5991 struct ieee80211_link_data *link, 5992 int link_id, 5993 struct cfg80211_bss *cbss, bool mlo, 5994 struct ieee80211_conn_settings *conn, 5995 unsigned long *userspace_selectors) 5996 { 5997 struct ieee80211_local *local = sdata->local; 5998 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5999 struct ieee80211_chan_req chanreq = {}; 6000 struct cfg80211_chan_def ap_chandef; 6001 struct ieee802_11_elems *elems; 6002 int ret; 6003 6004 lockdep_assert_wiphy(local->hw.wiphy); 6005 6006 rcu_read_lock(); 6007 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 6008 &chanreq, &ap_chandef, 6009 userspace_selectors); 6010 6011 if (IS_ERR(elems)) { 6012 rcu_read_unlock(); 6013 return PTR_ERR(elems); 6014 } 6015 6016 if (mlo && !elems->ml_basic) { 6017 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 6018 rcu_read_unlock(); 6019 kfree(elems); 6020 return -EINVAL; 6021 } 6022 6023 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 6024 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 6025 6026 if (elems->pwr_constr_elem) 6027 link->conf->pwr_reduction = *elems->pwr_constr_elem; 6028 6029 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 6030 if (he_6ghz_oper) 6031 link->conf->power_type = 6032 ieee80211_ap_power_type(he_6ghz_oper->control); 6033 else 6034 link_info(link, 6035 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 6036 cbss->channel->center_freq); 6037 6038 link->conf->tpe = elems->tpe; 6039 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 6040 &chanreq.oper); 6041 } 6042 rcu_read_unlock(); 6043 /* the element data was RCU protected so no longer valid anyway */ 6044 kfree(elems); 6045 elems = NULL; 6046 6047 if (!link) 6048 return 0; 6049 6050 rcu_read_lock(); 6051 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 6052 local->rx_chains); 6053 rcu_read_unlock(); 6054 6055 /* 6056 * If this fails (possibly due to channel context sharing 6057 * on incompatible channels, e.g. 80+80 and 160 sharing the 6058 * same control channel) try to use a smaller bandwidth. 6059 */ 6060 ret = ieee80211_link_use_channel(link, &chanreq, 6061 IEEE80211_CHANCTX_SHARED); 6062 6063 /* don't downgrade for 5 and 10 MHz channels, though. */ 6064 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6065 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6066 return ret; 6067 6068 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6069 ieee80211_chanreq_downgrade(&chanreq, conn); 6070 6071 ret = ieee80211_link_use_channel(link, &chanreq, 6072 IEEE80211_CHANCTX_SHARED); 6073 } 6074 6075 return ret; 6076 } 6077 6078 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6079 u8 *dtim_count, u8 *dtim_period) 6080 { 6081 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6082 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6083 ies->len); 6084 const struct ieee80211_tim_ie *tim = NULL; 6085 const struct ieee80211_bssid_index *idx; 6086 bool valid = tim_ie && tim_ie[1] >= 2; 6087 6088 if (valid) 6089 tim = (void *)(tim_ie + 2); 6090 6091 if (dtim_count) 6092 *dtim_count = valid ? tim->dtim_count : 0; 6093 6094 if (dtim_period) 6095 *dtim_period = valid ? tim->dtim_period : 0; 6096 6097 /* Check if value is overridden by non-transmitted profile */ 6098 if (!idx_ie || idx_ie[1] < 3) 6099 return valid; 6100 6101 idx = (void *)(idx_ie + 2); 6102 6103 if (dtim_count) 6104 *dtim_count = idx->dtim_count; 6105 6106 if (dtim_period) 6107 *dtim_period = idx->dtim_period; 6108 6109 return true; 6110 } 6111 6112 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6113 struct ieee80211_mgmt *mgmt, 6114 struct ieee802_11_elems *elems, 6115 const u8 *elem_start, unsigned int elem_len) 6116 { 6117 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6118 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6119 struct ieee80211_local *local = sdata->local; 6120 unsigned int link_id; 6121 struct sta_info *sta; 6122 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6123 u16 valid_links = 0, dormant_links = 0; 6124 int err; 6125 6126 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6127 /* 6128 * station info was already allocated and inserted before 6129 * the association and should be available to us 6130 */ 6131 sta = sta_info_get(sdata, assoc_data->ap_addr); 6132 if (WARN_ON(!sta)) 6133 goto out_err; 6134 6135 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6136 6137 if (ieee80211_vif_is_mld(&sdata->vif)) { 6138 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6139 if (!assoc_data->link[link_id].bss) 6140 continue; 6141 6142 valid_links |= BIT(link_id); 6143 if (assoc_data->link[link_id].disabled) 6144 dormant_links |= BIT(link_id); 6145 6146 if (link_id != assoc_data->assoc_link_id) { 6147 err = ieee80211_sta_allocate_link(sta, link_id); 6148 if (err) 6149 goto out_err; 6150 } 6151 } 6152 6153 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6154 } 6155 6156 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6157 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6158 struct ieee80211_link_data *link; 6159 struct link_sta_info *link_sta; 6160 6161 if (!cbss) 6162 continue; 6163 6164 link = sdata_dereference(sdata->link[link_id], sdata); 6165 if (WARN_ON(!link)) 6166 goto out_err; 6167 6168 if (ieee80211_vif_is_mld(&sdata->vif)) 6169 link_info(link, 6170 "local address %pM, AP link address %pM%s\n", 6171 link->conf->addr, 6172 assoc_data->link[link_id].bss->bssid, 6173 link_id == assoc_data->assoc_link_id ? 6174 " (assoc)" : ""); 6175 6176 link_sta = rcu_dereference_protected(sta->link[link_id], 6177 lockdep_is_held(&local->hw.wiphy->mtx)); 6178 if (WARN_ON(!link_sta)) 6179 goto out_err; 6180 6181 if (!link->u.mgd.have_beacon) { 6182 const struct cfg80211_bss_ies *ies; 6183 6184 rcu_read_lock(); 6185 ies = rcu_dereference(cbss->beacon_ies); 6186 if (ies) 6187 link->u.mgd.have_beacon = true; 6188 else 6189 ies = rcu_dereference(cbss->ies); 6190 ieee80211_get_dtim(ies, 6191 &link->conf->sync_dtim_count, 6192 &link->u.mgd.dtim_period); 6193 link->conf->beacon_int = cbss->beacon_interval; 6194 rcu_read_unlock(); 6195 } 6196 6197 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6198 6199 if (link_id != assoc_data->assoc_link_id) { 6200 link->u.mgd.conn = assoc_data->link[link_id].conn; 6201 6202 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6203 true, &link->u.mgd.conn, 6204 sdata->u.mgd.userspace_selectors); 6205 if (err) { 6206 link_info(link, "prep_channel failed\n"); 6207 goto out_err; 6208 } 6209 } 6210 6211 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6212 assoc_data->link[link_id].bss); 6213 if (err) 6214 goto out_err; 6215 6216 if (!ieee80211_assoc_config_link(link, link_sta, 6217 assoc_data->link[link_id].bss, 6218 mgmt, elem_start, elem_len, 6219 &changed[link_id])) 6220 goto out_err; 6221 6222 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6223 valid_links &= ~BIT(link_id); 6224 ieee80211_sta_remove_link(sta, link_id); 6225 continue; 6226 } 6227 6228 if (link_id != assoc_data->assoc_link_id) { 6229 err = ieee80211_sta_activate_link(sta, link_id); 6230 if (err) 6231 goto out_err; 6232 } 6233 } 6234 6235 /* links might have changed due to rejected ones, set them again */ 6236 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6237 6238 rate_control_rate_init_all_links(sta); 6239 6240 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6241 set_sta_flag(sta, WLAN_STA_MFP); 6242 sta->sta.mfp = true; 6243 } else { 6244 sta->sta.mfp = false; 6245 } 6246 6247 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6248 elems->ext_capab_len); 6249 6250 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6251 local->hw.queues >= IEEE80211_NUM_ACS; 6252 6253 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6254 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6255 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6256 if (err) { 6257 sdata_info(sdata, 6258 "failed to move station %pM to desired state\n", 6259 sta->sta.addr); 6260 WARN_ON(__sta_info_destroy(sta)); 6261 goto out_err; 6262 } 6263 6264 if (sdata->wdev.use_4addr) 6265 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6266 6267 ieee80211_set_associated(sdata, assoc_data, changed); 6268 6269 /* 6270 * If we're using 4-addr mode, let the AP know that we're 6271 * doing so, so that it can create the STA VLAN on its side 6272 */ 6273 if (ifmgd->use_4addr) 6274 ieee80211_send_4addr_nullfunc(local, sdata); 6275 6276 /* 6277 * Start timer to probe the connection to the AP now. 6278 * Also start the timer that will detect beacon loss. 6279 */ 6280 ieee80211_sta_reset_beacon_monitor(sdata); 6281 ieee80211_sta_reset_conn_monitor(sdata); 6282 6283 return true; 6284 out_err: 6285 eth_zero_addr(sdata->vif.cfg.ap_addr); 6286 return false; 6287 } 6288 6289 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6290 struct ieee80211_mgmt *mgmt, 6291 size_t len) 6292 { 6293 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6294 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6295 u16 capab_info, status_code, aid; 6296 struct ieee80211_elems_parse_params parse_params = { 6297 .bss = NULL, 6298 .link_id = -1, 6299 .from_ap = true, 6300 }; 6301 struct ieee802_11_elems *elems; 6302 int ac; 6303 const u8 *elem_start; 6304 unsigned int elem_len; 6305 bool reassoc; 6306 struct ieee80211_event event = { 6307 .type = MLME_EVENT, 6308 .u.mlme.data = ASSOC_EVENT, 6309 }; 6310 struct ieee80211_prep_tx_info info = {}; 6311 struct cfg80211_rx_assoc_resp_data resp = { 6312 .uapsd_queues = -1, 6313 }; 6314 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6315 unsigned int link_id; 6316 6317 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6318 6319 if (!assoc_data) 6320 return; 6321 6322 info.link_id = assoc_data->assoc_link_id; 6323 6324 parse_params.mode = 6325 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6326 6327 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6328 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6329 return; 6330 6331 /* 6332 * AssocResp and ReassocResp have identical structure, so process both 6333 * of them in this function. 6334 */ 6335 6336 if (len < 24 + 6) 6337 return; 6338 6339 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6340 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6341 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6342 if (assoc_data->s1g) 6343 elem_start = mgmt->u.s1g_assoc_resp.variable; 6344 else 6345 elem_start = mgmt->u.assoc_resp.variable; 6346 6347 /* 6348 * Note: this may not be perfect, AP might misbehave - if 6349 * anyone needs to rely on perfect complete notification 6350 * with the exact right subtype, then we need to track what 6351 * we actually transmitted. 6352 */ 6353 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6354 IEEE80211_STYPE_ASSOC_REQ; 6355 6356 if (assoc_data->fils_kek_len && 6357 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6358 return; 6359 6360 elem_len = len - (elem_start - (u8 *)mgmt); 6361 parse_params.start = elem_start; 6362 parse_params.len = elem_len; 6363 elems = ieee802_11_parse_elems_full(&parse_params); 6364 if (!elems) 6365 goto notify_driver; 6366 6367 if (elems->aid_resp) 6368 aid = le16_to_cpu(elems->aid_resp->aid); 6369 else if (assoc_data->s1g) 6370 aid = 0; /* TODO */ 6371 else 6372 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6373 6374 /* 6375 * The 5 MSB of the AID field are reserved 6376 * (802.11-2016 9.4.1.8 AID field) 6377 */ 6378 aid &= 0x7ff; 6379 6380 sdata_info(sdata, 6381 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6382 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6383 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6384 6385 ifmgd->broken_ap = false; 6386 6387 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6388 elems->timeout_int && 6389 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6390 u32 tu, ms; 6391 6392 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6393 le32_to_cpu(elems->timeout_int->value)); 6394 6395 tu = le32_to_cpu(elems->timeout_int->value); 6396 ms = tu * 1024 / 1000; 6397 sdata_info(sdata, 6398 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6399 assoc_data->ap_addr, tu, ms); 6400 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6401 assoc_data->timeout_started = true; 6402 assoc_data->comeback = true; 6403 if (ms > IEEE80211_ASSOC_TIMEOUT) 6404 run_again(sdata, assoc_data->timeout); 6405 goto notify_driver; 6406 } 6407 6408 if (status_code != WLAN_STATUS_SUCCESS) { 6409 sdata_info(sdata, "%pM denied association (code=%d)\n", 6410 assoc_data->ap_addr, status_code); 6411 event.u.mlme.status = MLME_DENIED; 6412 event.u.mlme.reason = status_code; 6413 drv_event_callback(sdata->local, sdata, &event); 6414 } else { 6415 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6416 sdata_info(sdata, 6417 "invalid AID value %d (out of range), turn off PS\n", 6418 aid); 6419 aid = 0; 6420 ifmgd->broken_ap = true; 6421 } 6422 6423 if (ieee80211_vif_is_mld(&sdata->vif)) { 6424 struct ieee80211_mle_basic_common_info *common; 6425 6426 if (!elems->ml_basic) { 6427 sdata_info(sdata, 6428 "MLO association with %pM but no (basic) multi-link element in response!\n", 6429 assoc_data->ap_addr); 6430 goto abandon_assoc; 6431 } 6432 6433 common = (void *)elems->ml_basic->variable; 6434 6435 if (memcmp(assoc_data->ap_addr, 6436 common->mld_mac_addr, ETH_ALEN)) { 6437 sdata_info(sdata, 6438 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6439 common->mld_mac_addr, 6440 assoc_data->ap_addr); 6441 goto abandon_assoc; 6442 } 6443 6444 sdata->vif.cfg.eml_cap = 6445 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6446 sdata->vif.cfg.eml_med_sync_delay = 6447 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6448 sdata->vif.cfg.mld_capa_op = 6449 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6450 } 6451 6452 sdata->vif.cfg.aid = aid; 6453 6454 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6455 elem_start, elem_len)) { 6456 /* oops -- internal error -- send timeout for now */ 6457 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6458 goto notify_driver; 6459 } 6460 event.u.mlme.status = MLME_SUCCESS; 6461 drv_event_callback(sdata->local, sdata, &event); 6462 sdata_info(sdata, "associated\n"); 6463 6464 info.success = 1; 6465 } 6466 6467 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6468 struct ieee80211_link_data *link; 6469 6470 if (!assoc_data->link[link_id].bss) 6471 continue; 6472 6473 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6474 ether_addr_copy(resp.links[link_id].addr, 6475 assoc_data->link[link_id].addr); 6476 resp.links[link_id].status = assoc_data->link[link_id].status; 6477 6478 link = sdata_dereference(sdata->link[link_id], sdata); 6479 if (!link) 6480 continue; 6481 6482 /* get uapsd queues configuration - same for all links */ 6483 resp.uapsd_queues = 0; 6484 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6485 if (link->tx_conf[ac].uapsd) 6486 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6487 } 6488 6489 if (ieee80211_vif_is_mld(&sdata->vif)) { 6490 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6491 resp.ap_mld_addr = ap_mld_addr; 6492 } 6493 6494 ieee80211_destroy_assoc_data(sdata, 6495 status_code == WLAN_STATUS_SUCCESS ? 6496 ASSOC_SUCCESS : 6497 ASSOC_REJECTED); 6498 6499 resp.buf = (u8 *)mgmt; 6500 resp.len = len; 6501 resp.req_ies = ifmgd->assoc_req_ies; 6502 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6503 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6504 notify_driver: 6505 drv_mgd_complete_tx(sdata->local, sdata, &info); 6506 kfree(elems); 6507 return; 6508 abandon_assoc: 6509 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6510 goto notify_driver; 6511 } 6512 6513 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6514 struct ieee80211_mgmt *mgmt, size_t len, 6515 struct ieee80211_rx_status *rx_status) 6516 { 6517 struct ieee80211_sub_if_data *sdata = link->sdata; 6518 struct ieee80211_local *local = sdata->local; 6519 struct ieee80211_bss *bss; 6520 struct ieee80211_channel *channel; 6521 6522 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6523 6524 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6525 ieee80211_rx_status_to_khz(rx_status)); 6526 if (!channel) 6527 return; 6528 6529 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6530 if (bss) { 6531 link->conf->beacon_rate = bss->beacon_rate; 6532 ieee80211_rx_bss_put(local, bss); 6533 } 6534 } 6535 6536 6537 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6538 struct sk_buff *skb) 6539 { 6540 struct ieee80211_sub_if_data *sdata = link->sdata; 6541 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6542 struct ieee80211_if_managed *ifmgd; 6543 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6544 struct ieee80211_channel *channel; 6545 size_t baselen, len = skb->len; 6546 6547 ifmgd = &sdata->u.mgd; 6548 6549 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6550 6551 /* 6552 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6553 * "If a 6 GHz AP receives a Probe Request frame and responds with 6554 * a Probe Response frame [..], the Address 1 field of the Probe 6555 * Response frame shall be set to the broadcast address [..]" 6556 * So, on 6GHz band we should also accept broadcast responses. 6557 */ 6558 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6559 rx_status->freq); 6560 if (!channel) 6561 return; 6562 6563 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6564 (channel->band != NL80211_BAND_6GHZ || 6565 !is_broadcast_ether_addr(mgmt->da))) 6566 return; /* ignore ProbeResp to foreign address */ 6567 6568 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6569 if (baselen > len) 6570 return; 6571 6572 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6573 6574 if (ifmgd->associated && 6575 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6576 ieee80211_reset_ap_probe(sdata); 6577 } 6578 6579 /* 6580 * This is the canonical list of information elements we care about, 6581 * the filter code also gives us all changes to the Microsoft OUI 6582 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6583 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6584 * changes to requested client power. 6585 * 6586 * We implement beacon filtering in software since that means we can 6587 * avoid processing the frame here and in cfg80211, and userspace 6588 * will not be able to tell whether the hardware supports it or not. 6589 * 6590 * XXX: This list needs to be dynamic -- userspace needs to be able to 6591 * add items it requires. It also needs to be able to tell us to 6592 * look out for other vendor IEs. 6593 */ 6594 static const u64 care_about_ies = 6595 (1ULL << WLAN_EID_COUNTRY) | 6596 (1ULL << WLAN_EID_ERP_INFO) | 6597 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6598 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6599 (1ULL << WLAN_EID_HT_CAPABILITY) | 6600 (1ULL << WLAN_EID_HT_OPERATION) | 6601 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6602 6603 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6604 struct ieee80211_if_managed *ifmgd, 6605 struct ieee80211_bss_conf *bss_conf, 6606 struct ieee80211_local *local, 6607 struct ieee80211_rx_status *rx_status) 6608 { 6609 struct ieee80211_sub_if_data *sdata = link->sdata; 6610 6611 /* Track average RSSI from the Beacon frames of the current AP */ 6612 6613 if (!link->u.mgd.tracking_signal_avg) { 6614 link->u.mgd.tracking_signal_avg = true; 6615 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6616 link->u.mgd.last_cqm_event_signal = 0; 6617 link->u.mgd.count_beacon_signal = 1; 6618 link->u.mgd.last_ave_beacon_signal = 0; 6619 } else { 6620 link->u.mgd.count_beacon_signal++; 6621 } 6622 6623 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6624 -rx_status->signal); 6625 6626 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6627 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6628 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6629 int last_sig = link->u.mgd.last_ave_beacon_signal; 6630 struct ieee80211_event event = { 6631 .type = RSSI_EVENT, 6632 }; 6633 6634 /* 6635 * if signal crosses either of the boundaries, invoke callback 6636 * with appropriate parameters 6637 */ 6638 if (sig > ifmgd->rssi_max_thold && 6639 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6640 link->u.mgd.last_ave_beacon_signal = sig; 6641 event.u.rssi.data = RSSI_EVENT_HIGH; 6642 drv_event_callback(local, sdata, &event); 6643 } else if (sig < ifmgd->rssi_min_thold && 6644 (last_sig >= ifmgd->rssi_max_thold || 6645 last_sig == 0)) { 6646 link->u.mgd.last_ave_beacon_signal = sig; 6647 event.u.rssi.data = RSSI_EVENT_LOW; 6648 drv_event_callback(local, sdata, &event); 6649 } 6650 } 6651 6652 if (bss_conf->cqm_rssi_thold && 6653 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6654 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6655 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6656 int last_event = link->u.mgd.last_cqm_event_signal; 6657 int thold = bss_conf->cqm_rssi_thold; 6658 int hyst = bss_conf->cqm_rssi_hyst; 6659 6660 if (sig < thold && 6661 (last_event == 0 || sig < last_event - hyst)) { 6662 link->u.mgd.last_cqm_event_signal = sig; 6663 ieee80211_cqm_rssi_notify( 6664 &sdata->vif, 6665 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6666 sig, GFP_KERNEL); 6667 } else if (sig > thold && 6668 (last_event == 0 || sig > last_event + hyst)) { 6669 link->u.mgd.last_cqm_event_signal = sig; 6670 ieee80211_cqm_rssi_notify( 6671 &sdata->vif, 6672 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6673 sig, GFP_KERNEL); 6674 } 6675 } 6676 6677 if (bss_conf->cqm_rssi_low && 6678 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6679 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6680 int last_event = link->u.mgd.last_cqm_event_signal; 6681 int low = bss_conf->cqm_rssi_low; 6682 int high = bss_conf->cqm_rssi_high; 6683 6684 if (sig < low && 6685 (last_event == 0 || last_event >= low)) { 6686 link->u.mgd.last_cqm_event_signal = sig; 6687 ieee80211_cqm_rssi_notify( 6688 &sdata->vif, 6689 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6690 sig, GFP_KERNEL); 6691 } else if (sig > high && 6692 (last_event == 0 || last_event <= high)) { 6693 link->u.mgd.last_cqm_event_signal = sig; 6694 ieee80211_cqm_rssi_notify( 6695 &sdata->vif, 6696 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6697 sig, GFP_KERNEL); 6698 } 6699 } 6700 } 6701 6702 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6703 struct cfg80211_bss *bss) 6704 { 6705 if (ether_addr_equal(tx_bssid, bss->bssid)) 6706 return true; 6707 if (!bss->transmitted_bss) 6708 return false; 6709 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6710 } 6711 6712 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6713 struct wiphy_work *work) 6714 { 6715 struct ieee80211_sub_if_data *sdata = 6716 container_of(work, struct ieee80211_sub_if_data, 6717 u.mgd.ml_reconf_work.work); 6718 u16 new_valid_links, new_active_links, new_dormant_links; 6719 int ret; 6720 6721 if (!sdata->u.mgd.removed_links) 6722 return; 6723 6724 sdata_info(sdata, 6725 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6726 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6727 6728 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6729 if (new_valid_links == sdata->vif.valid_links) 6730 return; 6731 6732 if (!new_valid_links || 6733 !(new_valid_links & ~sdata->vif.dormant_links)) { 6734 sdata_info(sdata, "No valid links after reconfiguration\n"); 6735 ret = -EINVAL; 6736 goto out; 6737 } 6738 6739 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6740 if (new_active_links != sdata->vif.active_links) { 6741 if (!new_active_links) 6742 new_active_links = 6743 BIT(ffs(new_valid_links & 6744 ~sdata->vif.dormant_links) - 1); 6745 6746 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6747 if (ret) { 6748 sdata_info(sdata, 6749 "Failed setting active links\n"); 6750 goto out; 6751 } 6752 } 6753 6754 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6755 6756 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6757 new_dormant_links); 6758 if (ret) 6759 sdata_info(sdata, "Failed setting valid links\n"); 6760 6761 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6762 6763 out: 6764 if (!ret) 6765 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6766 else 6767 __ieee80211_disconnect(sdata); 6768 6769 sdata->u.mgd.removed_links = 0; 6770 } 6771 6772 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6773 struct ieee802_11_elems *elems) 6774 { 6775 const struct element *sub; 6776 unsigned long removed_links = 0; 6777 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6778 u8 link_id; 6779 u32 delay; 6780 6781 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6782 return; 6783 6784 /* Directly parse the sub elements as the common information doesn't 6785 * hold any useful information. 6786 */ 6787 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6788 elems->ml_reconf_len) { 6789 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6790 u8 *pos = prof->variable; 6791 u16 control; 6792 6793 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6794 continue; 6795 6796 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6797 sub->datalen)) 6798 return; 6799 6800 control = le16_to_cpu(prof->control); 6801 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6802 6803 removed_links |= BIT(link_id); 6804 6805 /* the MAC address should not be included, but handle it */ 6806 if (control & 6807 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6808 pos += 6; 6809 6810 /* According to Draft P802.11be_D3.0, the control should 6811 * include the AP Removal Timer present. If the AP Removal Timer 6812 * is not present assume immediate removal. 6813 */ 6814 if (control & 6815 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6816 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6817 } 6818 6819 removed_links &= sdata->vif.valid_links; 6820 if (!removed_links) { 6821 /* In case the removal was cancelled, abort it */ 6822 if (sdata->u.mgd.removed_links) { 6823 sdata->u.mgd.removed_links = 0; 6824 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6825 &sdata->u.mgd.ml_reconf_work); 6826 } 6827 return; 6828 } 6829 6830 delay = 0; 6831 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6832 struct ieee80211_bss_conf *link_conf = 6833 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6834 u32 link_delay; 6835 6836 if (!link_conf) { 6837 removed_links &= ~BIT(link_id); 6838 continue; 6839 } 6840 6841 if (link_removal_timeout[link_id] < 1) 6842 link_delay = 0; 6843 else 6844 link_delay = link_conf->beacon_int * 6845 (link_removal_timeout[link_id] - 1); 6846 6847 if (!delay) 6848 delay = link_delay; 6849 else 6850 delay = min(delay, link_delay); 6851 } 6852 6853 sdata->u.mgd.removed_links = removed_links; 6854 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6855 &sdata->u.mgd.ml_reconf_work, 6856 TU_TO_JIFFIES(delay)); 6857 } 6858 6859 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6860 u16 active_links, u16 dormant_links, 6861 u16 suspended_links) 6862 { 6863 u64 changed = 0; 6864 int ret; 6865 6866 if (!active_links) { 6867 ret = -EINVAL; 6868 goto out; 6869 } 6870 6871 /* If there is an active negotiated TTLM, it should be discarded by 6872 * the new negotiated/advertised TTLM. 6873 */ 6874 if (sdata->vif.neg_ttlm.valid) { 6875 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6876 sdata->vif.suspended_links = 0; 6877 changed = BSS_CHANGED_MLD_TTLM; 6878 } 6879 6880 if (sdata->vif.active_links != active_links) { 6881 /* usable links are affected when active_links are changed, 6882 * so notify the driver about the status change 6883 */ 6884 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6885 active_links &= sdata->vif.active_links; 6886 if (!active_links) 6887 active_links = 6888 BIT(__ffs(sdata->vif.valid_links & 6889 ~dormant_links)); 6890 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6891 if (ret) { 6892 sdata_info(sdata, "Failed to set TTLM active links\n"); 6893 goto out; 6894 } 6895 } 6896 6897 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6898 dormant_links); 6899 if (ret) { 6900 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6901 goto out; 6902 } 6903 6904 sdata->vif.suspended_links = suspended_links; 6905 if (sdata->vif.suspended_links) 6906 changed |= BSS_CHANGED_MLD_TTLM; 6907 6908 ieee80211_vif_cfg_change_notify(sdata, changed); 6909 6910 out: 6911 if (ret) 6912 ieee80211_disconnect(&sdata->vif, false); 6913 6914 return ret; 6915 } 6916 6917 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6918 struct wiphy_work *work) 6919 { 6920 u16 new_active_links, new_dormant_links; 6921 struct ieee80211_sub_if_data *sdata = 6922 container_of(work, struct ieee80211_sub_if_data, 6923 u.mgd.ttlm_work.work); 6924 6925 new_active_links = sdata->u.mgd.ttlm_info.map & 6926 sdata->vif.valid_links; 6927 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6928 sdata->vif.valid_links; 6929 6930 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6931 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6932 0)) 6933 return; 6934 6935 sdata->u.mgd.ttlm_info.active = true; 6936 sdata->u.mgd.ttlm_info.switch_time = 0; 6937 } 6938 6939 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6940 { 6941 if (bm_size == 1) 6942 return *data; 6943 else 6944 return get_unaligned_le16(data); 6945 } 6946 6947 static int 6948 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6949 const struct ieee80211_ttlm_elem *ttlm, 6950 struct ieee80211_adv_ttlm_info *ttlm_info) 6951 { 6952 /* The element size was already validated in 6953 * ieee80211_tid_to_link_map_size_ok() 6954 */ 6955 u8 control, link_map_presence, map_size, tid; 6956 u8 *pos; 6957 6958 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6959 pos = (void *)ttlm->optional; 6960 control = ttlm->control; 6961 6962 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6963 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6964 return 0; 6965 6966 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6967 IEEE80211_TTLM_DIRECTION_BOTH) { 6968 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6969 return -EINVAL; 6970 } 6971 6972 link_map_presence = *pos; 6973 pos++; 6974 6975 ttlm_info->switch_time = get_unaligned_le16(pos); 6976 6977 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6978 * by 1. 6979 */ 6980 if (!ttlm_info->switch_time) 6981 ttlm_info->switch_time = 1; 6982 6983 pos += 2; 6984 6985 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6986 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6987 pos += 3; 6988 } 6989 6990 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6991 map_size = 1; 6992 else 6993 map_size = 2; 6994 6995 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6996 * not advertise a TID-to-link mapping that does not map all TIDs to the 6997 * same link set, reject frame if not all links have mapping 6998 */ 6999 if (link_map_presence != 0xff) { 7000 sdata_info(sdata, 7001 "Invalid advertised T2L mapping presence indicator\n"); 7002 return -EINVAL; 7003 } 7004 7005 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 7006 if (!ttlm_info->map) { 7007 sdata_info(sdata, 7008 "Invalid advertised T2L map for TID 0\n"); 7009 return -EINVAL; 7010 } 7011 7012 pos += map_size; 7013 7014 for (tid = 1; tid < 8; tid++) { 7015 u16 map = ieee80211_get_ttlm(map_size, pos); 7016 7017 if (map != ttlm_info->map) { 7018 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 7019 tid); 7020 return -EINVAL; 7021 } 7022 7023 pos += map_size; 7024 } 7025 return 0; 7026 } 7027 7028 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 7029 struct ieee802_11_elems *elems, 7030 u64 beacon_ts) 7031 { 7032 u8 i; 7033 int ret; 7034 7035 if (!ieee80211_vif_is_mld(&sdata->vif)) 7036 return; 7037 7038 if (!elems->ttlm_num) { 7039 if (sdata->u.mgd.ttlm_info.switch_time) { 7040 /* if a planned TID-to-link mapping was cancelled - 7041 * abort it 7042 */ 7043 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7044 &sdata->u.mgd.ttlm_work); 7045 } else if (sdata->u.mgd.ttlm_info.active) { 7046 /* if no TID-to-link element, set to default mapping in 7047 * which all TIDs are mapped to all setup links 7048 */ 7049 ret = ieee80211_vif_set_links(sdata, 7050 sdata->vif.valid_links, 7051 0); 7052 if (ret) { 7053 sdata_info(sdata, "Failed setting valid/dormant links\n"); 7054 return; 7055 } 7056 ieee80211_vif_cfg_change_notify(sdata, 7057 BSS_CHANGED_MLD_VALID_LINKS); 7058 } 7059 memset(&sdata->u.mgd.ttlm_info, 0, 7060 sizeof(sdata->u.mgd.ttlm_info)); 7061 return; 7062 } 7063 7064 for (i = 0; i < elems->ttlm_num; i++) { 7065 struct ieee80211_adv_ttlm_info ttlm_info; 7066 u32 res; 7067 7068 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7069 &ttlm_info); 7070 7071 if (res) { 7072 __ieee80211_disconnect(sdata); 7073 return; 7074 } 7075 7076 if (ttlm_info.switch_time) { 7077 u16 beacon_ts_tu, st_tu, delay; 7078 u32 delay_jiffies; 7079 u64 mask; 7080 7081 /* The t2l map switch time is indicated with a partial 7082 * TSF value (bits 10 to 25), get the partial beacon TS 7083 * as well, and calc the delay to the start time. 7084 */ 7085 mask = GENMASK_ULL(25, 10); 7086 beacon_ts_tu = (beacon_ts & mask) >> 10; 7087 st_tu = ttlm_info.switch_time; 7088 delay = st_tu - beacon_ts_tu; 7089 7090 /* 7091 * If the switch time is far in the future, then it 7092 * could also be the previous switch still being 7093 * announced. 7094 * We can simply ignore it for now, if it is a future 7095 * switch the AP will continue to announce it anyway. 7096 */ 7097 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7098 return; 7099 7100 delay_jiffies = TU_TO_JIFFIES(delay); 7101 7102 /* Link switching can take time, so schedule it 7103 * 100ms before to be ready on time 7104 */ 7105 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7106 delay_jiffies -= 7107 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7108 else 7109 delay_jiffies = 0; 7110 7111 sdata->u.mgd.ttlm_info = ttlm_info; 7112 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7113 &sdata->u.mgd.ttlm_work); 7114 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7115 &sdata->u.mgd.ttlm_work, 7116 delay_jiffies); 7117 return; 7118 } 7119 } 7120 } 7121 7122 static void 7123 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7124 int reporting_link_id, 7125 struct ieee802_11_elems *elems) 7126 { 7127 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7128 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7129 const struct element *sub; 7130 const u8 *subelems; 7131 size_t subelems_len; 7132 u8 common_size; 7133 int link_id; 7134 7135 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7136 return; 7137 7138 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7139 subelems = (u8 *)elems->ml_basic + common_size; 7140 subelems_len = elems->ml_basic_len - common_size; 7141 7142 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7143 subelems, subelems_len) { 7144 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7145 struct ieee80211_link_data *link; 7146 ssize_t len; 7147 7148 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7149 sub->datalen)) 7150 continue; 7151 7152 link_id = le16_get_bits(prof->control, 7153 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7154 /* need a valid link ID, but also not our own, both AP bugs */ 7155 if (link_id == reporting_link_id || 7156 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7157 continue; 7158 7159 link = sdata_dereference(sdata->link[link_id], sdata); 7160 if (!link) 7161 continue; 7162 7163 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7164 NULL, 0, 7165 IEEE80211_MLE_SUBELEM_FRAGMENT); 7166 if (WARN_ON(len < 0)) 7167 continue; 7168 7169 sta_profiles[link_id] = sub; 7170 sta_profiles_len[link_id] = len; 7171 } 7172 7173 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7174 struct ieee80211_mle_per_sta_profile *prof; 7175 struct ieee802_11_elems *prof_elems; 7176 struct ieee80211_link_data *link; 7177 ssize_t len; 7178 7179 if (link_id == reporting_link_id) 7180 continue; 7181 7182 link = sdata_dereference(sdata->link[link_id], sdata); 7183 if (!link) 7184 continue; 7185 7186 if (!sta_profiles[link_id]) { 7187 prof_elems = NULL; 7188 goto handle; 7189 } 7190 7191 /* we can defragment in-place, won't use the buffer again */ 7192 len = cfg80211_defragment_element(sta_profiles[link_id], 7193 subelems, subelems_len, 7194 (void *)sta_profiles[link_id], 7195 sta_profiles_len[link_id], 7196 IEEE80211_MLE_SUBELEM_FRAGMENT); 7197 if (WARN_ON(len != sta_profiles_len[link_id])) 7198 continue; 7199 7200 prof = (void *)sta_profiles[link_id]; 7201 prof_elems = ieee802_11_parse_elems(prof->variable + 7202 (prof->sta_info_len - 1), 7203 len - 7204 (prof->sta_info_len - 1), 7205 false, NULL); 7206 7207 /* memory allocation failed - let's hope that's transient */ 7208 if (!prof_elems) 7209 continue; 7210 7211 handle: 7212 /* 7213 * FIXME: the timings here are obviously incorrect, 7214 * but only older Intel drivers seem to care, and 7215 * those don't have MLO. If you really need this, 7216 * the problem is having to calculate it with the 7217 * TSF offset etc. The device_timestamp is still 7218 * correct, of course. 7219 */ 7220 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7221 IEEE80211_CSA_SOURCE_OTHER_LINK); 7222 kfree(prof_elems); 7223 } 7224 } 7225 7226 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7227 const struct ieee802_11_elems *elems) 7228 { 7229 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7230 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7231 7232 if (!elems->ssid) 7233 return false; 7234 7235 /* hidden SSID: zero length */ 7236 if (elems->ssid_len == 0) 7237 return false; 7238 7239 if (elems->ssid_len != cfg->ssid_len) 7240 return true; 7241 7242 /* hidden SSID: zeroed out */ 7243 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7244 return false; 7245 7246 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7247 } 7248 7249 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7250 struct ieee80211_hdr *hdr, size_t len, 7251 struct ieee80211_rx_status *rx_status) 7252 { 7253 struct ieee80211_sub_if_data *sdata = link->sdata; 7254 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7255 struct ieee80211_bss_conf *bss_conf = link->conf; 7256 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7257 struct ieee80211_mgmt *mgmt = (void *) hdr; 7258 size_t baselen; 7259 struct ieee802_11_elems *elems; 7260 struct ieee80211_local *local = sdata->local; 7261 struct ieee80211_chanctx_conf *chanctx_conf; 7262 struct ieee80211_supported_band *sband; 7263 struct ieee80211_channel *chan; 7264 struct link_sta_info *link_sta; 7265 struct sta_info *sta; 7266 u64 changed = 0; 7267 bool erp_valid; 7268 u8 erp_value = 0; 7269 u32 ncrc = 0; 7270 u8 *bssid, *variable = mgmt->u.beacon.variable; 7271 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7272 struct ieee80211_elems_parse_params parse_params = { 7273 .mode = link->u.mgd.conn.mode, 7274 .link_id = -1, 7275 .from_ap = true, 7276 }; 7277 7278 lockdep_assert_wiphy(local->hw.wiphy); 7279 7280 /* Process beacon from the current BSS */ 7281 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7282 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7283 struct ieee80211_ext *ext = (void *) mgmt; 7284 variable = ext->u.s1g_beacon.variable + 7285 ieee80211_s1g_optional_len(ext->frame_control); 7286 } 7287 7288 baselen = (u8 *) variable - (u8 *) mgmt; 7289 if (baselen > len) 7290 return; 7291 7292 parse_params.start = variable; 7293 parse_params.len = len - baselen; 7294 7295 rcu_read_lock(); 7296 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7297 if (!chanctx_conf) { 7298 rcu_read_unlock(); 7299 return; 7300 } 7301 7302 if (ieee80211_rx_status_to_khz(rx_status) != 7303 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 7304 rcu_read_unlock(); 7305 return; 7306 } 7307 chan = chanctx_conf->def.chan; 7308 rcu_read_unlock(); 7309 7310 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7311 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7312 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7313 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7314 elems = ieee802_11_parse_elems_full(&parse_params); 7315 if (!elems) 7316 return; 7317 7318 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7319 7320 if (elems->dtim_period) 7321 link->u.mgd.dtim_period = elems->dtim_period; 7322 link->u.mgd.have_beacon = true; 7323 ifmgd->assoc_data->need_beacon = false; 7324 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7325 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7326 bss_conf->sync_tsf = 7327 le64_to_cpu(mgmt->u.beacon.timestamp); 7328 bss_conf->sync_device_ts = 7329 rx_status->device_timestamp; 7330 bss_conf->sync_dtim_count = elems->dtim_count; 7331 } 7332 7333 if (elems->mbssid_config_ie) 7334 bss_conf->profile_periodicity = 7335 elems->mbssid_config_ie->profile_periodicity; 7336 else 7337 bss_conf->profile_periodicity = 0; 7338 7339 if (elems->ext_capab_len >= 11 && 7340 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7341 bss_conf->ema_ap = true; 7342 else 7343 bss_conf->ema_ap = false; 7344 7345 /* continue assoc process */ 7346 ifmgd->assoc_data->timeout = jiffies; 7347 ifmgd->assoc_data->timeout_started = true; 7348 run_again(sdata, ifmgd->assoc_data->timeout); 7349 kfree(elems); 7350 return; 7351 } 7352 7353 if (!ifmgd->associated || 7354 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7355 return; 7356 bssid = link->u.mgd.bssid; 7357 7358 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7359 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7360 local, rx_status); 7361 7362 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7363 mlme_dbg_ratelimited(sdata, 7364 "cancelling AP probe due to a received beacon\n"); 7365 ieee80211_reset_ap_probe(sdata); 7366 } 7367 7368 /* 7369 * Push the beacon loss detection into the future since 7370 * we are processing a beacon from the AP just now. 7371 */ 7372 ieee80211_sta_reset_beacon_monitor(sdata); 7373 7374 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7375 * element (which carries the beacon interval). Don't forget to add a 7376 * bit to care_about_ies[] above if mac80211 is interested in a 7377 * changing S1G element. 7378 */ 7379 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7380 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7381 parse_params.bss = bss_conf->bss; 7382 parse_params.filter = care_about_ies; 7383 parse_params.crc = ncrc; 7384 elems = ieee802_11_parse_elems_full(&parse_params); 7385 if (!elems) 7386 return; 7387 7388 if (rx_status->flag & RX_FLAG_DECRYPTED && 7389 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7390 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7391 sdata->vif.cfg.ap_addr); 7392 __ieee80211_disconnect(sdata); 7393 return; 7394 } 7395 7396 ncrc = elems->crc; 7397 7398 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7399 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7400 if (local->hw.conf.dynamic_ps_timeout > 0) { 7401 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7402 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7403 ieee80211_hw_config(local, -1, 7404 IEEE80211_CONF_CHANGE_PS); 7405 } 7406 ieee80211_send_nullfunc(local, sdata, false); 7407 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7408 local->pspolling = true; 7409 7410 /* 7411 * Here is assumed that the driver will be 7412 * able to send ps-poll frame and receive a 7413 * response even though power save mode is 7414 * enabled, but some drivers might require 7415 * to disable power save here. This needs 7416 * to be investigated. 7417 */ 7418 ieee80211_send_pspoll(local, sdata); 7419 } 7420 } 7421 7422 if (sdata->vif.p2p || 7423 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7424 struct ieee80211_p2p_noa_attr noa = {}; 7425 int ret; 7426 7427 ret = cfg80211_get_p2p_attr(variable, 7428 len - baselen, 7429 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7430 (u8 *) &noa, sizeof(noa)); 7431 if (ret >= 2) { 7432 if (link->u.mgd.p2p_noa_index != noa.index) { 7433 /* valid noa_attr and index changed */ 7434 link->u.mgd.p2p_noa_index = noa.index; 7435 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7436 changed |= BSS_CHANGED_P2P_PS; 7437 /* 7438 * make sure we update all information, the CRC 7439 * mechanism doesn't look at P2P attributes. 7440 */ 7441 link->u.mgd.beacon_crc_valid = false; 7442 } 7443 } else if (link->u.mgd.p2p_noa_index != -1) { 7444 /* noa_attr not found and we had valid noa_attr before */ 7445 link->u.mgd.p2p_noa_index = -1; 7446 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7447 changed |= BSS_CHANGED_P2P_PS; 7448 link->u.mgd.beacon_crc_valid = false; 7449 } 7450 } 7451 7452 /* 7453 * Update beacon timing and dtim count on every beacon appearance. This 7454 * will allow the driver to use the most updated values. Do it before 7455 * comparing this one with last received beacon. 7456 * IMPORTANT: These parameters would possibly be out of sync by the time 7457 * the driver will use them. The synchronized view is currently 7458 * guaranteed only in certain callbacks. 7459 */ 7460 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7461 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7462 bss_conf->sync_tsf = 7463 le64_to_cpu(mgmt->u.beacon.timestamp); 7464 bss_conf->sync_device_ts = 7465 rx_status->device_timestamp; 7466 bss_conf->sync_dtim_count = elems->dtim_count; 7467 } 7468 7469 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7470 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 7471 goto free; 7472 link->u.mgd.beacon_crc = ncrc; 7473 link->u.mgd.beacon_crc_valid = true; 7474 7475 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7476 7477 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7478 rx_status->device_timestamp, 7479 elems, elems, 7480 IEEE80211_CSA_SOURCE_BEACON); 7481 7482 /* note that after this elems->ml_basic can no longer be used fully */ 7483 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7484 7485 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7486 7487 if (!sdata->u.mgd.epcs.enabled && 7488 !link->u.mgd.disable_wmm_tracking && 7489 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7490 elems->wmm_param_len, 7491 elems->mu_edca_param_set)) 7492 changed |= BSS_CHANGED_QOS; 7493 7494 /* 7495 * If we haven't had a beacon before, tell the driver about the 7496 * DTIM period (and beacon timing if desired) now. 7497 */ 7498 if (!link->u.mgd.have_beacon) { 7499 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7500 bss_conf->dtim_period = elems->dtim_period ?: 1; 7501 7502 changed |= BSS_CHANGED_BEACON_INFO; 7503 link->u.mgd.have_beacon = true; 7504 7505 ieee80211_recalc_ps(local); 7506 7507 ieee80211_recalc_ps_vif(sdata); 7508 } 7509 7510 if (elems->erp_info) { 7511 erp_valid = true; 7512 erp_value = elems->erp_info[0]; 7513 } else { 7514 erp_valid = false; 7515 } 7516 7517 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7518 changed |= ieee80211_handle_bss_capability(link, 7519 le16_to_cpu(mgmt->u.beacon.capab_info), 7520 erp_valid, erp_value); 7521 7522 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7523 if (WARN_ON(!sta)) { 7524 goto free; 7525 } 7526 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7527 lockdep_is_held(&local->hw.wiphy->mtx)); 7528 if (WARN_ON(!link_sta)) { 7529 goto free; 7530 } 7531 7532 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7533 goto free; 7534 7535 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7536 7537 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7538 7539 if (ieee80211_config_bw(link, elems, true, &changed, "beacon")) { 7540 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7541 WLAN_REASON_DEAUTH_LEAVING, 7542 true, deauth_buf); 7543 ieee80211_report_disconnect(sdata, deauth_buf, 7544 sizeof(deauth_buf), true, 7545 WLAN_REASON_DEAUTH_LEAVING, 7546 false); 7547 goto free; 7548 } 7549 7550 if (elems->opmode_notif) 7551 ieee80211_vht_handle_opmode(sdata, link_sta, 7552 *elems->opmode_notif, 7553 rx_status->band); 7554 7555 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7556 elems->country_elem, 7557 elems->country_elem_len, 7558 elems->pwr_constr_elem, 7559 elems->cisco_dtpc_elem); 7560 7561 ieee80211_ml_reconfiguration(sdata, elems); 7562 ieee80211_process_adv_ttlm(sdata, elems, 7563 le64_to_cpu(mgmt->u.beacon.timestamp)); 7564 7565 ieee80211_link_info_change_notify(sdata, link, changed); 7566 free: 7567 kfree(elems); 7568 } 7569 7570 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7571 struct ieee80211_neg_ttlm neg_ttlm) 7572 { 7573 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7574 u8 i; 7575 7576 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7577 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7578 7579 /* If there is an active TTLM, unset previously suspended links */ 7580 if (sdata->vif.neg_ttlm.valid) 7581 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7582 7583 /* exclude links that are already disabled by advertised TTLM */ 7584 new_active_links = 7585 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7586 new_suspended_links = 7587 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7588 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7589 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7590 new_dormant_links, new_suspended_links)) 7591 return; 7592 7593 sdata->vif.neg_ttlm = neg_ttlm; 7594 sdata->vif.neg_ttlm.valid = true; 7595 } 7596 7597 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7598 struct wiphy_work *work) 7599 { 7600 struct ieee80211_sub_if_data *sdata = 7601 container_of(work, struct ieee80211_sub_if_data, 7602 u.mgd.neg_ttlm_timeout_work.work); 7603 7604 sdata_info(sdata, 7605 "No negotiated TTLM response from AP, disconnecting.\n"); 7606 7607 __ieee80211_disconnect(sdata); 7608 } 7609 7610 static void 7611 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7612 struct ieee80211_neg_ttlm *neg_ttlm) 7613 { 7614 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7615 7616 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7617 sizeof(neg_ttlm->downlink))) { 7618 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7619 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7620 } else { 7621 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7622 } 7623 7624 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7625 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7626 __le16 map; 7627 7628 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7629 7630 pos = skb_put(skb, len + 2); 7631 *pos++ = WLAN_EID_EXTENSION; 7632 len_pos = pos++; 7633 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7634 *pos++ = direction[i]; 7635 map_ind_pos = pos++; 7636 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7637 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7638 cpu_to_le16(neg_ttlm->uplink[tid]) : 7639 cpu_to_le16(neg_ttlm->downlink[tid]); 7640 if (!map) 7641 continue; 7642 7643 len += 2; 7644 map_ind |= BIT(tid); 7645 skb_put_data(skb, &map, sizeof(map)); 7646 } 7647 7648 *map_ind_pos = map_ind; 7649 *len_pos = len; 7650 7651 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7652 break; 7653 } 7654 } 7655 7656 static void 7657 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7658 struct ieee80211_neg_ttlm *neg_ttlm, 7659 u8 dialog_token) 7660 { 7661 struct ieee80211_local *local = sdata->local; 7662 struct ieee80211_mgmt *mgmt; 7663 struct sk_buff *skb; 7664 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7665 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7666 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7667 7668 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7669 if (!skb) 7670 return; 7671 7672 skb_reserve(skb, local->tx_headroom); 7673 mgmt = skb_put_zero(skb, hdr_len); 7674 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7675 IEEE80211_STYPE_ACTION); 7676 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7677 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7678 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7679 7680 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7681 mgmt->u.action.u.ttlm_req.action_code = 7682 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7683 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7684 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7685 ieee80211_tx_skb(sdata, skb); 7686 } 7687 7688 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7689 struct cfg80211_ttlm_params *params) 7690 { 7691 struct ieee80211_neg_ttlm neg_ttlm = {}; 7692 u8 i; 7693 7694 if (!ieee80211_vif_is_mld(&sdata->vif) || 7695 !(sdata->vif.cfg.mld_capa_op & 7696 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7697 return -EINVAL; 7698 7699 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7700 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7701 (params->ulink[i] & ~sdata->vif.valid_links)) 7702 return -EINVAL; 7703 7704 neg_ttlm.downlink[i] = params->dlink[i]; 7705 neg_ttlm.uplink[i] = params->ulink[i]; 7706 } 7707 7708 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7709 NEG_TTLM_RES_ACCEPT) 7710 return -EINVAL; 7711 7712 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7713 sdata->u.mgd.dialog_token_alloc++; 7714 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7715 sdata->u.mgd.dialog_token_alloc); 7716 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7717 &sdata->u.mgd.neg_ttlm_timeout_work); 7718 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7719 &sdata->u.mgd.neg_ttlm_timeout_work, 7720 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7721 return 0; 7722 } 7723 7724 static void 7725 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7726 enum ieee80211_neg_ttlm_res ttlm_res, 7727 u8 dialog_token, 7728 struct ieee80211_neg_ttlm *neg_ttlm) 7729 { 7730 struct ieee80211_local *local = sdata->local; 7731 struct ieee80211_mgmt *mgmt; 7732 struct sk_buff *skb; 7733 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7734 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7735 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7736 u16 status_code; 7737 7738 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7739 if (!skb) 7740 return; 7741 7742 skb_reserve(skb, local->tx_headroom); 7743 mgmt = skb_put_zero(skb, hdr_len); 7744 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7745 IEEE80211_STYPE_ACTION); 7746 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7747 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7748 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7749 7750 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7751 mgmt->u.action.u.ttlm_res.action_code = 7752 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7753 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7754 switch (ttlm_res) { 7755 default: 7756 WARN_ON(1); 7757 fallthrough; 7758 case NEG_TTLM_RES_REJECT: 7759 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7760 break; 7761 case NEG_TTLM_RES_ACCEPT: 7762 status_code = WLAN_STATUS_SUCCESS; 7763 break; 7764 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7765 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7766 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7767 break; 7768 } 7769 7770 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7771 ieee80211_tx_skb(sdata, skb); 7772 } 7773 7774 static int 7775 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7776 const struct ieee80211_ttlm_elem *ttlm, 7777 struct ieee80211_neg_ttlm *neg_ttlm, 7778 u8 *direction) 7779 { 7780 u8 control, link_map_presence, map_size, tid; 7781 u8 *pos; 7782 7783 /* The element size was already validated in 7784 * ieee80211_tid_to_link_map_size_ok() 7785 */ 7786 pos = (void *)ttlm->optional; 7787 7788 control = ttlm->control; 7789 7790 /* mapping switch time and expected duration fields are not expected 7791 * in case of negotiated TTLM 7792 */ 7793 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7794 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7795 mlme_dbg(sdata, 7796 "Invalid TTLM element in negotiated TTLM request\n"); 7797 return -EINVAL; 7798 } 7799 7800 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7801 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7802 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7803 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7804 } 7805 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7806 return 0; 7807 } 7808 7809 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7810 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7811 *direction != IEEE80211_TTLM_DIRECTION_UP && 7812 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7813 return -EINVAL; 7814 7815 link_map_presence = *pos; 7816 pos++; 7817 7818 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7819 map_size = 1; 7820 else 7821 map_size = 2; 7822 7823 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7824 u16 map; 7825 7826 if (link_map_presence & BIT(tid)) { 7827 map = ieee80211_get_ttlm(map_size, pos); 7828 if (!map) { 7829 mlme_dbg(sdata, 7830 "No active links for TID %d", tid); 7831 return -EINVAL; 7832 } 7833 } else { 7834 map = 0; 7835 } 7836 7837 switch (*direction) { 7838 case IEEE80211_TTLM_DIRECTION_BOTH: 7839 neg_ttlm->downlink[tid] = map; 7840 neg_ttlm->uplink[tid] = map; 7841 break; 7842 case IEEE80211_TTLM_DIRECTION_DOWN: 7843 neg_ttlm->downlink[tid] = map; 7844 break; 7845 case IEEE80211_TTLM_DIRECTION_UP: 7846 neg_ttlm->uplink[tid] = map; 7847 break; 7848 default: 7849 return -EINVAL; 7850 } 7851 pos += map_size; 7852 } 7853 return 0; 7854 } 7855 7856 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7857 struct ieee80211_mgmt *mgmt, size_t len) 7858 { 7859 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7860 size_t ies_len; 7861 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7862 struct ieee802_11_elems *elems = NULL; 7863 struct ieee80211_neg_ttlm neg_ttlm = {}; 7864 7865 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7866 7867 if (!ieee80211_vif_is_mld(&sdata->vif)) 7868 return; 7869 7870 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7871 ies_len = len - offsetof(struct ieee80211_mgmt, 7872 u.action.u.ttlm_req.variable); 7873 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7874 ies_len, true, NULL); 7875 if (!elems) { 7876 ttlm_res = NEG_TTLM_RES_REJECT; 7877 goto out; 7878 } 7879 7880 for (i = 0; i < elems->ttlm_num; i++) { 7881 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7882 &neg_ttlm, &direction[i]) || 7883 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7884 elems->ttlm_num != 1)) { 7885 ttlm_res = NEG_TTLM_RES_REJECT; 7886 goto out; 7887 } 7888 } 7889 7890 if (!elems->ttlm_num || 7891 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7892 ttlm_res = NEG_TTLM_RES_REJECT; 7893 goto out; 7894 } 7895 7896 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7897 if ((neg_ttlm.downlink[i] && 7898 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7899 (neg_ttlm.uplink[i] && 7900 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7901 ttlm_res = NEG_TTLM_RES_REJECT; 7902 goto out; 7903 } 7904 } 7905 7906 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7907 7908 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7909 goto out; 7910 7911 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7912 out: 7913 kfree(elems); 7914 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7915 } 7916 7917 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7918 struct ieee80211_mgmt *mgmt, size_t len) 7919 { 7920 if (!ieee80211_vif_is_mld(&sdata->vif) || 7921 mgmt->u.action.u.ttlm_req.dialog_token != 7922 sdata->u.mgd.dialog_token_alloc) 7923 return; 7924 7925 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7926 &sdata->u.mgd.neg_ttlm_timeout_work); 7927 7928 /* MLD station sends a TID to link mapping request, mainly to handle 7929 * BTM (BSS transition management) request, in which case it needs to 7930 * restrict the active links set. 7931 * In this case it's not expected that the MLD AP will reject the 7932 * negotiated TTLM request. 7933 * This can be better implemented in the future, to handle request 7934 * rejections. 7935 */ 7936 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 7937 __ieee80211_disconnect(sdata); 7938 } 7939 7940 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 7941 { 7942 u16 new_dormant_links; 7943 7944 if (!sdata->vif.neg_ttlm.valid) 7945 return; 7946 7947 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7948 new_dormant_links = 7949 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7950 sdata->vif.suspended_links = 0; 7951 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7952 new_dormant_links); 7953 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7954 BSS_CHANGED_MLD_VALID_LINKS); 7955 } 7956 7957 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7958 struct wiphy_work *work) 7959 { 7960 struct ieee80211_sub_if_data *sdata = 7961 container_of(work, struct ieee80211_sub_if_data, 7962 u.mgd.teardown_ttlm_work); 7963 7964 ieee80211_process_ttlm_teardown(sdata); 7965 } 7966 7967 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7968 { 7969 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7970 struct ieee80211_local *local = sdata->local; 7971 struct ieee80211_mgmt *mgmt; 7972 struct sk_buff *skb; 7973 int frame_len = offsetofend(struct ieee80211_mgmt, 7974 u.action.u.ttlm_tear_down); 7975 struct ieee80211_tx_info *info; 7976 7977 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7978 if (!skb) 7979 return; 7980 7981 skb_reserve(skb, local->hw.extra_tx_headroom); 7982 mgmt = skb_put_zero(skb, frame_len); 7983 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7984 IEEE80211_STYPE_ACTION); 7985 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7986 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7987 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7988 7989 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7990 mgmt->u.action.u.ttlm_tear_down.action_code = 7991 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7992 7993 info = IEEE80211_SKB_CB(skb); 7994 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7995 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7996 ieee80211_tx_skb(sdata, skb); 7997 } 7998 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7999 8000 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 8001 struct sk_buff *skb) 8002 { 8003 struct ieee80211_link_data *link = &sdata->deflink; 8004 struct ieee80211_rx_status *rx_status; 8005 struct ieee80211_hdr *hdr; 8006 u16 fc; 8007 8008 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8009 8010 rx_status = (struct ieee80211_rx_status *) skb->cb; 8011 hdr = (struct ieee80211_hdr *) skb->data; 8012 fc = le16_to_cpu(hdr->frame_control); 8013 8014 switch (fc & IEEE80211_FCTL_STYPE) { 8015 case IEEE80211_STYPE_S1G_BEACON: 8016 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 8017 break; 8018 } 8019 } 8020 8021 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 8022 struct sk_buff *skb) 8023 { 8024 struct ieee80211_link_data *link = &sdata->deflink; 8025 struct ieee80211_rx_status *rx_status; 8026 struct ieee802_11_elems *elems; 8027 struct ieee80211_mgmt *mgmt; 8028 u16 fc; 8029 int ies_len; 8030 8031 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8032 8033 rx_status = (struct ieee80211_rx_status *) skb->cb; 8034 mgmt = (struct ieee80211_mgmt *) skb->data; 8035 fc = le16_to_cpu(mgmt->frame_control); 8036 8037 if (rx_status->link_valid) { 8038 link = sdata_dereference(sdata->link[rx_status->link_id], 8039 sdata); 8040 if (!link) 8041 return; 8042 } 8043 8044 switch (fc & IEEE80211_FCTL_STYPE) { 8045 case IEEE80211_STYPE_BEACON: 8046 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 8047 skb->len, rx_status); 8048 break; 8049 case IEEE80211_STYPE_PROBE_RESP: 8050 ieee80211_rx_mgmt_probe_resp(link, skb); 8051 break; 8052 case IEEE80211_STYPE_AUTH: 8053 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 8054 break; 8055 case IEEE80211_STYPE_DEAUTH: 8056 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 8057 break; 8058 case IEEE80211_STYPE_DISASSOC: 8059 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8060 break; 8061 case IEEE80211_STYPE_ASSOC_RESP: 8062 case IEEE80211_STYPE_REASSOC_RESP: 8063 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8064 break; 8065 case IEEE80211_STYPE_ACTION: 8066 if (!sdata->u.mgd.associated || 8067 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8068 break; 8069 8070 switch (mgmt->u.action.category) { 8071 case WLAN_CATEGORY_SPECTRUM_MGMT: 8072 ies_len = skb->len - 8073 offsetof(struct ieee80211_mgmt, 8074 u.action.u.chan_switch.variable); 8075 8076 if (ies_len < 0) 8077 break; 8078 8079 /* CSA IE cannot be overridden, no need for BSSID */ 8080 elems = ieee802_11_parse_elems( 8081 mgmt->u.action.u.chan_switch.variable, 8082 ies_len, true, NULL); 8083 8084 if (elems && !elems->parse_error) { 8085 enum ieee80211_csa_source src = 8086 IEEE80211_CSA_SOURCE_PROT_ACTION; 8087 8088 ieee80211_sta_process_chanswitch(link, 8089 rx_status->mactime, 8090 rx_status->device_timestamp, 8091 elems, elems, 8092 src); 8093 } 8094 kfree(elems); 8095 break; 8096 case WLAN_CATEGORY_PUBLIC: 8097 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8098 ies_len = skb->len - 8099 offsetof(struct ieee80211_mgmt, 8100 u.action.u.ext_chan_switch.variable); 8101 8102 if (ies_len < 0) 8103 break; 8104 8105 /* 8106 * extended CSA IE can't be overridden, no need for 8107 * BSSID 8108 */ 8109 elems = ieee802_11_parse_elems( 8110 mgmt->u.action.u.ext_chan_switch.variable, 8111 ies_len, true, NULL); 8112 8113 if (elems && !elems->parse_error) { 8114 enum ieee80211_csa_source src; 8115 8116 if (mgmt->u.action.category == 8117 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8118 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8119 else 8120 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8121 8122 /* for the handling code pretend it was an IE */ 8123 elems->ext_chansw_ie = 8124 &mgmt->u.action.u.ext_chan_switch.data; 8125 8126 ieee80211_sta_process_chanswitch(link, 8127 rx_status->mactime, 8128 rx_status->device_timestamp, 8129 elems, elems, 8130 src); 8131 } 8132 8133 kfree(elems); 8134 break; 8135 } 8136 break; 8137 } 8138 } 8139 8140 static void ieee80211_sta_timer(struct timer_list *t) 8141 { 8142 struct ieee80211_sub_if_data *sdata = 8143 timer_container_of(sdata, t, u.mgd.timer); 8144 8145 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8146 } 8147 8148 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8149 u8 reason, bool tx) 8150 { 8151 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8152 8153 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8154 tx, frame_buf); 8155 8156 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8157 reason, false); 8158 } 8159 8160 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8161 { 8162 struct ieee80211_local *local = sdata->local; 8163 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8164 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8165 u32 tx_flags = 0; 8166 u16 trans = 1; 8167 u16 status = 0; 8168 struct ieee80211_prep_tx_info info = { 8169 .subtype = IEEE80211_STYPE_AUTH, 8170 }; 8171 8172 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8173 8174 if (WARN_ON_ONCE(!auth_data)) 8175 return -EINVAL; 8176 8177 auth_data->tries++; 8178 8179 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8180 sdata_info(sdata, "authentication with %pM timed out\n", 8181 auth_data->ap_addr); 8182 8183 /* 8184 * Most likely AP is not in the range so remove the 8185 * bss struct for that AP. 8186 */ 8187 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8188 8189 return -ETIMEDOUT; 8190 } 8191 8192 if (auth_data->algorithm == WLAN_AUTH_SAE) 8193 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8194 8195 info.link_id = auth_data->link_id; 8196 drv_mgd_prepare_tx(local, sdata, &info); 8197 8198 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8199 auth_data->ap_addr, auth_data->tries, 8200 IEEE80211_AUTH_MAX_TRIES); 8201 8202 auth_data->expected_transaction = 2; 8203 8204 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8205 trans = auth_data->sae_trans; 8206 status = auth_data->sae_status; 8207 auth_data->expected_transaction = trans; 8208 } 8209 8210 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8211 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8212 IEEE80211_TX_INTFL_MLME_CONN_TX; 8213 8214 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8215 auth_data->data, auth_data->data_len, 8216 auth_data->ap_addr, auth_data->ap_addr, 8217 NULL, 0, 0, tx_flags); 8218 8219 if (tx_flags == 0) { 8220 if (auth_data->algorithm == WLAN_AUTH_SAE) 8221 auth_data->timeout = jiffies + 8222 IEEE80211_AUTH_TIMEOUT_SAE; 8223 else 8224 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8225 } else { 8226 auth_data->timeout = 8227 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8228 } 8229 8230 auth_data->timeout_started = true; 8231 run_again(sdata, auth_data->timeout); 8232 8233 return 0; 8234 } 8235 8236 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8237 { 8238 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8239 struct ieee80211_local *local = sdata->local; 8240 int ret; 8241 8242 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8243 8244 assoc_data->tries++; 8245 assoc_data->comeback = false; 8246 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8247 sdata_info(sdata, "association with %pM timed out\n", 8248 assoc_data->ap_addr); 8249 8250 /* 8251 * Most likely AP is not in the range so remove the 8252 * bss struct for that AP. 8253 */ 8254 cfg80211_unlink_bss(local->hw.wiphy, 8255 assoc_data->link[assoc_data->assoc_link_id].bss); 8256 8257 return -ETIMEDOUT; 8258 } 8259 8260 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8261 assoc_data->ap_addr, assoc_data->tries, 8262 IEEE80211_ASSOC_MAX_TRIES); 8263 ret = ieee80211_send_assoc(sdata); 8264 if (ret) 8265 return ret; 8266 8267 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8268 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8269 assoc_data->timeout_started = true; 8270 run_again(sdata, assoc_data->timeout); 8271 } else { 8272 assoc_data->timeout = 8273 round_jiffies_up(jiffies + 8274 IEEE80211_ASSOC_TIMEOUT_LONG); 8275 assoc_data->timeout_started = true; 8276 run_again(sdata, assoc_data->timeout); 8277 } 8278 8279 return 0; 8280 } 8281 8282 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8283 __le16 fc, bool acked) 8284 { 8285 struct ieee80211_local *local = sdata->local; 8286 8287 sdata->u.mgd.status_fc = fc; 8288 sdata->u.mgd.status_acked = acked; 8289 sdata->u.mgd.status_received = true; 8290 8291 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8292 } 8293 8294 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8295 { 8296 struct ieee80211_local *local = sdata->local; 8297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8298 8299 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8300 8301 if (ifmgd->status_received) { 8302 __le16 fc = ifmgd->status_fc; 8303 bool status_acked = ifmgd->status_acked; 8304 8305 ifmgd->status_received = false; 8306 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8307 if (status_acked) { 8308 if (ifmgd->auth_data->algorithm == 8309 WLAN_AUTH_SAE) 8310 ifmgd->auth_data->timeout = 8311 jiffies + 8312 IEEE80211_AUTH_TIMEOUT_SAE; 8313 else 8314 ifmgd->auth_data->timeout = 8315 jiffies + 8316 IEEE80211_AUTH_TIMEOUT_SHORT; 8317 run_again(sdata, ifmgd->auth_data->timeout); 8318 } else { 8319 ifmgd->auth_data->timeout = jiffies - 1; 8320 } 8321 ifmgd->auth_data->timeout_started = true; 8322 } else if (ifmgd->assoc_data && 8323 !ifmgd->assoc_data->comeback && 8324 (ieee80211_is_assoc_req(fc) || 8325 ieee80211_is_reassoc_req(fc))) { 8326 /* 8327 * Update association timeout based on the TX status 8328 * for the (Re)Association Request frame. Skip this if 8329 * we have already processed a (Re)Association Response 8330 * frame that indicated need for association comeback 8331 * at a specific time in the future. This could happen 8332 * if the TX status information is delayed enough for 8333 * the response to be received and processed first. 8334 */ 8335 if (status_acked) { 8336 ifmgd->assoc_data->timeout = 8337 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8338 run_again(sdata, ifmgd->assoc_data->timeout); 8339 } else { 8340 ifmgd->assoc_data->timeout = jiffies - 1; 8341 } 8342 ifmgd->assoc_data->timeout_started = true; 8343 } 8344 } 8345 8346 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8347 time_after(jiffies, ifmgd->auth_data->timeout)) { 8348 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8349 /* 8350 * ok ... we waited for assoc or continuation but 8351 * userspace didn't do it, so kill the auth data 8352 */ 8353 ieee80211_destroy_auth_data(sdata, false); 8354 } else if (ieee80211_auth(sdata)) { 8355 u8 ap_addr[ETH_ALEN]; 8356 struct ieee80211_event event = { 8357 .type = MLME_EVENT, 8358 .u.mlme.data = AUTH_EVENT, 8359 .u.mlme.status = MLME_TIMEOUT, 8360 }; 8361 8362 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8363 8364 ieee80211_destroy_auth_data(sdata, false); 8365 8366 cfg80211_auth_timeout(sdata->dev, ap_addr); 8367 drv_event_callback(sdata->local, sdata, &event); 8368 } 8369 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8370 run_again(sdata, ifmgd->auth_data->timeout); 8371 8372 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8373 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8374 if ((ifmgd->assoc_data->need_beacon && 8375 !sdata->deflink.u.mgd.have_beacon) || 8376 ieee80211_do_assoc(sdata)) { 8377 struct ieee80211_event event = { 8378 .type = MLME_EVENT, 8379 .u.mlme.data = ASSOC_EVENT, 8380 .u.mlme.status = MLME_TIMEOUT, 8381 }; 8382 8383 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8384 drv_event_callback(sdata->local, sdata, &event); 8385 } 8386 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8387 run_again(sdata, ifmgd->assoc_data->timeout); 8388 8389 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8390 ifmgd->associated) { 8391 u8 *bssid = sdata->deflink.u.mgd.bssid; 8392 int max_tries; 8393 8394 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8395 max_tries = max_nullfunc_tries; 8396 else 8397 max_tries = max_probe_tries; 8398 8399 /* ACK received for nullfunc probing frame */ 8400 if (!ifmgd->probe_send_count) 8401 ieee80211_reset_ap_probe(sdata); 8402 else if (ifmgd->nullfunc_failed) { 8403 if (ifmgd->probe_send_count < max_tries) { 8404 mlme_dbg(sdata, 8405 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8406 bssid, ifmgd->probe_send_count, 8407 max_tries); 8408 ieee80211_mgd_probe_ap_send(sdata); 8409 } else { 8410 mlme_dbg(sdata, 8411 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8412 bssid); 8413 ieee80211_sta_connection_lost(sdata, 8414 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8415 false); 8416 } 8417 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8418 run_again(sdata, ifmgd->probe_timeout); 8419 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8420 mlme_dbg(sdata, 8421 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8422 bssid, probe_wait_ms); 8423 ieee80211_sta_connection_lost(sdata, 8424 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8425 } else if (ifmgd->probe_send_count < max_tries) { 8426 mlme_dbg(sdata, 8427 "No probe response from AP %pM after %dms, try %d/%i\n", 8428 bssid, probe_wait_ms, 8429 ifmgd->probe_send_count, max_tries); 8430 ieee80211_mgd_probe_ap_send(sdata); 8431 } else { 8432 /* 8433 * We actually lost the connection ... or did we? 8434 * Let's make sure! 8435 */ 8436 mlme_dbg(sdata, 8437 "No probe response from AP %pM after %dms, disconnecting.\n", 8438 bssid, probe_wait_ms); 8439 8440 ieee80211_sta_connection_lost(sdata, 8441 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8442 } 8443 } 8444 } 8445 8446 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8447 { 8448 struct ieee80211_sub_if_data *sdata = 8449 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8450 8451 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8452 return; 8453 8454 if (sdata->vif.bss_conf.csa_active && 8455 !sdata->deflink.u.mgd.csa.waiting_bcn) 8456 return; 8457 8458 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8459 return; 8460 8461 sdata->u.mgd.connection_loss = false; 8462 wiphy_work_queue(sdata->local->hw.wiphy, 8463 &sdata->u.mgd.beacon_connection_loss_work); 8464 } 8465 8466 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8467 { 8468 struct ieee80211_sub_if_data *sdata = 8469 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8470 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8471 struct ieee80211_local *local = sdata->local; 8472 struct sta_info *sta; 8473 unsigned long timeout; 8474 8475 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8476 return; 8477 8478 if (sdata->vif.bss_conf.csa_active && 8479 !sdata->deflink.u.mgd.csa.waiting_bcn) 8480 return; 8481 8482 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8483 if (!sta) 8484 return; 8485 8486 timeout = sta->deflink.status_stats.last_ack; 8487 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8488 timeout = sta->deflink.rx_stats.last_rx; 8489 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8490 8491 /* If timeout is after now, then update timer to fire at 8492 * the later date, but do not actually probe at this time. 8493 */ 8494 if (time_is_after_jiffies(timeout)) { 8495 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8496 return; 8497 } 8498 8499 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8500 } 8501 8502 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8503 struct wiphy_work *work) 8504 { 8505 struct ieee80211_sub_if_data *sdata = 8506 container_of(work, struct ieee80211_sub_if_data, 8507 u.mgd.monitor_work); 8508 8509 ieee80211_mgd_probe_ap(sdata, false); 8510 } 8511 8512 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8513 { 8514 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8515 __ieee80211_stop_poll(sdata); 8516 8517 /* let's probe the connection once */ 8518 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8519 wiphy_work_queue(sdata->local->hw.wiphy, 8520 &sdata->u.mgd.monitor_work); 8521 } 8522 } 8523 8524 #ifdef CONFIG_PM 8525 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8526 { 8527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8528 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8529 8530 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8531 8532 if (ifmgd->auth_data || ifmgd->assoc_data) { 8533 const u8 *ap_addr = ifmgd->auth_data ? 8534 ifmgd->auth_data->ap_addr : 8535 ifmgd->assoc_data->ap_addr; 8536 8537 /* 8538 * If we are trying to authenticate / associate while suspending, 8539 * cfg80211 won't know and won't actually abort those attempts, 8540 * thus we need to do that ourselves. 8541 */ 8542 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8543 IEEE80211_STYPE_DEAUTH, 8544 WLAN_REASON_DEAUTH_LEAVING, 8545 false, frame_buf); 8546 if (ifmgd->assoc_data) 8547 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8548 if (ifmgd->auth_data) 8549 ieee80211_destroy_auth_data(sdata, false); 8550 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8551 IEEE80211_DEAUTH_FRAME_LEN, 8552 false); 8553 } 8554 8555 /* This is a bit of a hack - we should find a better and more generic 8556 * solution to this. Normally when suspending, cfg80211 will in fact 8557 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8558 * auth (not so important) or assoc (this is the problem) process. 8559 * 8560 * As a consequence, it can happen that we are in the process of both 8561 * associating and suspending, and receive an association response 8562 * after cfg80211 has checked if it needs to disconnect, but before 8563 * we actually set the flag to drop incoming frames. This will then 8564 * cause the workqueue flush to process the association response in 8565 * the suspend, resulting in a successful association just before it 8566 * tries to remove the interface from the driver, which now though 8567 * has a channel context assigned ... this results in issues. 8568 * 8569 * To work around this (for now) simply deauth here again if we're 8570 * now connected. 8571 */ 8572 if (ifmgd->associated && !sdata->local->wowlan) { 8573 u8 bssid[ETH_ALEN]; 8574 struct cfg80211_deauth_request req = { 8575 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8576 .bssid = bssid, 8577 }; 8578 8579 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8580 ieee80211_mgd_deauth(sdata, &req); 8581 } 8582 } 8583 #endif 8584 8585 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8586 { 8587 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8588 8589 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8590 8591 if (!ifmgd->associated) 8592 return; 8593 8594 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8595 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8596 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8597 ieee80211_sta_connection_lost(sdata, 8598 WLAN_REASON_UNSPECIFIED, 8599 true); 8600 return; 8601 } 8602 8603 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8604 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8605 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8606 ieee80211_sta_connection_lost(sdata, 8607 WLAN_REASON_UNSPECIFIED, 8608 true); 8609 return; 8610 } 8611 } 8612 8613 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8614 struct wiphy_work *work) 8615 { 8616 struct ieee80211_link_data *link = 8617 container_of(work, struct ieee80211_link_data, 8618 u.mgd.request_smps_work); 8619 8620 __ieee80211_request_smps_mgd(link->sdata, link, 8621 link->u.mgd.driver_smps_mode); 8622 } 8623 8624 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8625 struct wiphy_work *work) 8626 { 8627 struct ieee80211_sub_if_data *sdata = 8628 container_of(work, struct ieee80211_sub_if_data, 8629 u.mgd.reconf.wk.work); 8630 8631 if (!sdata->u.mgd.reconf.added_links && 8632 !sdata->u.mgd.reconf.removed_links) 8633 return; 8634 8635 sdata_info(sdata, 8636 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8637 sdata->u.mgd.reconf.added_links, 8638 sdata->u.mgd.reconf.removed_links); 8639 8640 __ieee80211_disconnect(sdata); 8641 } 8642 8643 /* interface setup */ 8644 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8645 { 8646 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8647 8648 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8649 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8650 ieee80211_beacon_connection_loss_work); 8651 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8652 ieee80211_csa_connection_drop_work); 8653 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8654 ieee80211_tdls_peer_del_work); 8655 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8656 ieee80211_ml_reconf_work); 8657 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8658 ieee80211_ml_sta_reconf_timeout); 8659 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8660 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8661 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8662 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8663 ieee80211_sta_handle_tspec_ac_params_wk); 8664 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8665 ieee80211_tid_to_link_map_work); 8666 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8667 ieee80211_neg_ttlm_timeout_work); 8668 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8669 ieee80211_teardown_ttlm_work); 8670 8671 ifmgd->flags = 0; 8672 ifmgd->powersave = sdata->wdev.ps; 8673 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8674 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8675 /* Setup TDLS data */ 8676 spin_lock_init(&ifmgd->teardown_lock); 8677 ifmgd->teardown_skb = NULL; 8678 ifmgd->orig_teardown_skb = NULL; 8679 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8680 } 8681 8682 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8683 struct wiphy_work *work) 8684 { 8685 struct ieee80211_link_data *link = 8686 container_of(work, struct ieee80211_link_data, 8687 u.mgd.recalc_smps); 8688 8689 ieee80211_recalc_smps(link->sdata, link); 8690 } 8691 8692 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8693 { 8694 struct ieee80211_sub_if_data *sdata = link->sdata; 8695 struct ieee80211_local *local = sdata->local; 8696 unsigned int link_id = link->link_id; 8697 8698 link->u.mgd.p2p_noa_index = -1; 8699 link->conf->bssid = link->u.mgd.bssid; 8700 link->smps_mode = IEEE80211_SMPS_OFF; 8701 8702 wiphy_work_init(&link->u.mgd.request_smps_work, 8703 ieee80211_request_smps_mgd_work); 8704 wiphy_work_init(&link->u.mgd.recalc_smps, 8705 ieee80211_recalc_smps_work); 8706 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8707 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8708 else 8709 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8710 8711 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8712 ieee80211_csa_switch_work); 8713 8714 ieee80211_clear_tpe(&link->conf->tpe); 8715 8716 if (sdata->u.mgd.assoc_data) 8717 ether_addr_copy(link->conf->addr, 8718 sdata->u.mgd.assoc_data->link[link_id].addr); 8719 else if (sdata->u.mgd.reconf.add_links_data) 8720 ether_addr_copy(link->conf->addr, 8721 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8722 else if (!is_valid_ether_addr(link->conf->addr)) 8723 eth_random_addr(link->conf->addr); 8724 } 8725 8726 /* scan finished notification */ 8727 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8728 { 8729 struct ieee80211_sub_if_data *sdata; 8730 8731 /* Restart STA timers */ 8732 rcu_read_lock(); 8733 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8734 if (ieee80211_sdata_running(sdata)) 8735 ieee80211_restart_sta_timer(sdata); 8736 } 8737 rcu_read_unlock(); 8738 } 8739 8740 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8741 struct cfg80211_bss *cbss, s8 link_id, 8742 const u8 *ap_mld_addr, bool assoc, 8743 struct ieee80211_conn_settings *conn, 8744 bool override, 8745 unsigned long *userspace_selectors) 8746 { 8747 struct ieee80211_local *local = sdata->local; 8748 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8749 struct ieee80211_bss *bss = (void *)cbss->priv; 8750 struct sta_info *new_sta = NULL; 8751 struct ieee80211_link_data *link; 8752 bool have_sta = false; 8753 bool mlo; 8754 int err; 8755 u16 new_links; 8756 8757 if (link_id >= 0) { 8758 mlo = true; 8759 if (WARN_ON(!ap_mld_addr)) 8760 return -EINVAL; 8761 new_links = BIT(link_id); 8762 } else { 8763 if (WARN_ON(ap_mld_addr)) 8764 return -EINVAL; 8765 ap_mld_addr = cbss->bssid; 8766 new_links = 0; 8767 link_id = 0; 8768 mlo = false; 8769 } 8770 8771 if (assoc) { 8772 rcu_read_lock(); 8773 have_sta = sta_info_get(sdata, ap_mld_addr); 8774 rcu_read_unlock(); 8775 } 8776 8777 if (mlo && !have_sta && 8778 WARN_ON(sdata->vif.valid_links || sdata->vif.active_links)) 8779 return -EINVAL; 8780 8781 err = ieee80211_vif_set_links(sdata, new_links, 0); 8782 if (err) 8783 return err; 8784 8785 link = sdata_dereference(sdata->link[link_id], sdata); 8786 if (WARN_ON(!link)) { 8787 err = -ENOLINK; 8788 goto out_err; 8789 } 8790 8791 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8792 err = -EINVAL; 8793 goto out_err; 8794 } 8795 8796 /* If a reconfig is happening, bail out */ 8797 if (local->in_reconfig) { 8798 err = -EBUSY; 8799 goto out_err; 8800 } 8801 8802 if (!have_sta) { 8803 if (mlo) 8804 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8805 link_id, cbss->bssid, 8806 GFP_KERNEL); 8807 else 8808 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8809 8810 if (!new_sta) { 8811 err = -ENOMEM; 8812 goto out_err; 8813 } 8814 8815 new_sta->sta.mlo = mlo; 8816 } 8817 8818 /* 8819 * Set up the information for the new channel before setting the 8820 * new channel. We can't - completely race-free - change the basic 8821 * rates bitmap and the channel (sband) that it refers to, but if 8822 * we set it up before we at least avoid calling into the driver's 8823 * bss_info_changed() method with invalid information (since we do 8824 * call that from changing the channel - only for IDLE and perhaps 8825 * some others, but ...). 8826 * 8827 * So to avoid that, just set up all the new information before the 8828 * channel, but tell the driver to apply it only afterwards, since 8829 * it might need the new channel for that. 8830 */ 8831 if (new_sta) { 8832 const struct cfg80211_bss_ies *ies; 8833 struct link_sta_info *link_sta; 8834 8835 rcu_read_lock(); 8836 link_sta = rcu_dereference(new_sta->link[link_id]); 8837 if (WARN_ON(!link_sta)) { 8838 rcu_read_unlock(); 8839 sta_info_free(local, new_sta); 8840 err = -EINVAL; 8841 goto out_err; 8842 } 8843 8844 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8845 link_sta, cbss); 8846 if (err) { 8847 rcu_read_unlock(); 8848 sta_info_free(local, new_sta); 8849 goto out_err; 8850 } 8851 8852 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8853 8854 /* set timing information */ 8855 link->conf->beacon_int = cbss->beacon_interval; 8856 ies = rcu_dereference(cbss->beacon_ies); 8857 if (ies) { 8858 link->conf->sync_tsf = ies->tsf; 8859 link->conf->sync_device_ts = 8860 bss->device_ts_beacon; 8861 8862 ieee80211_get_dtim(ies, 8863 &link->conf->sync_dtim_count, 8864 NULL); 8865 } else if (!ieee80211_hw_check(&sdata->local->hw, 8866 TIMING_BEACON_ONLY)) { 8867 ies = rcu_dereference(cbss->proberesp_ies); 8868 /* must be non-NULL since beacon IEs were NULL */ 8869 link->conf->sync_tsf = ies->tsf; 8870 link->conf->sync_device_ts = 8871 bss->device_ts_presp; 8872 link->conf->sync_dtim_count = 0; 8873 } else { 8874 link->conf->sync_tsf = 0; 8875 link->conf->sync_device_ts = 0; 8876 link->conf->sync_dtim_count = 0; 8877 } 8878 rcu_read_unlock(); 8879 } 8880 8881 if (new_sta || override) { 8882 /* 8883 * Only set this if we're also going to calculate the AP 8884 * settings etc., otherwise this was set before in a 8885 * previous call. Note override is set to %true in assoc 8886 * if the settings were changed. 8887 */ 8888 link->u.mgd.conn = *conn; 8889 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8890 mlo, &link->u.mgd.conn, 8891 userspace_selectors); 8892 if (err) { 8893 if (new_sta) 8894 sta_info_free(local, new_sta); 8895 goto out_err; 8896 } 8897 /* pass out for use in assoc */ 8898 *conn = link->u.mgd.conn; 8899 } 8900 8901 if (new_sta) { 8902 /* 8903 * tell driver about BSSID, basic rates and timing 8904 * this was set up above, before setting the channel 8905 */ 8906 ieee80211_link_info_change_notify(sdata, link, 8907 BSS_CHANGED_BSSID | 8908 BSS_CHANGED_BASIC_RATES | 8909 BSS_CHANGED_BEACON_INT); 8910 8911 if (assoc) 8912 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8913 8914 err = sta_info_insert(new_sta); 8915 new_sta = NULL; 8916 if (err) { 8917 sdata_info(sdata, 8918 "failed to insert STA entry for the AP (error %d)\n", 8919 err); 8920 goto out_release_chan; 8921 } 8922 } else 8923 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8924 8925 /* Cancel scan to ensure that nothing interferes with connection */ 8926 if (local->scanning) 8927 ieee80211_scan_cancel(local); 8928 8929 return 0; 8930 8931 out_release_chan: 8932 ieee80211_link_release_channel(link); 8933 out_err: 8934 ieee80211_vif_set_links(sdata, 0, 0); 8935 return err; 8936 } 8937 8938 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8939 const struct cfg80211_bss_ies *ies, 8940 u8 cur_channel, bool ignore_ecsa) 8941 { 8942 const struct element *csa_elem, *ecsa_elem; 8943 struct ieee80211_channel_sw_ie *csa = NULL; 8944 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8945 8946 if (!ies) 8947 return false; 8948 8949 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8950 ies->data, ies->len); 8951 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8952 csa = (void *)csa_elem->data; 8953 8954 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8955 ies->data, ies->len); 8956 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8957 ecsa = (void *)ecsa_elem->data; 8958 8959 if (csa && csa->count == 0) 8960 csa = NULL; 8961 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8962 csa = NULL; 8963 8964 if (ecsa && ecsa->count == 0) 8965 ecsa = NULL; 8966 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8967 ecsa = NULL; 8968 8969 if (ignore_ecsa && ecsa) { 8970 sdata_info(sdata, 8971 "Ignoring ECSA in probe response - was considered stuck!\n"); 8972 return csa; 8973 } 8974 8975 return csa || ecsa; 8976 } 8977 8978 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8979 struct cfg80211_bss *bss) 8980 { 8981 u8 cur_channel; 8982 bool ret; 8983 8984 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8985 8986 rcu_read_lock(); 8987 if (ieee80211_mgd_csa_present(sdata, 8988 rcu_dereference(bss->beacon_ies), 8989 cur_channel, false)) { 8990 ret = true; 8991 goto out; 8992 } 8993 8994 if (ieee80211_mgd_csa_present(sdata, 8995 rcu_dereference(bss->proberesp_ies), 8996 cur_channel, bss->proberesp_ecsa_stuck)) { 8997 ret = true; 8998 goto out; 8999 } 9000 9001 ret = false; 9002 out: 9003 rcu_read_unlock(); 9004 return ret; 9005 } 9006 9007 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 9008 const u8 *supported_selectors, 9009 u8 supported_selectors_len) 9010 { 9011 if (supported_selectors) { 9012 for (int i = 0; i < supported_selectors_len; i++) { 9013 set_bit(supported_selectors[i], 9014 userspace_selectors); 9015 } 9016 } else { 9017 /* Assume SAE_H2E support for backward compatibility. */ 9018 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 9019 userspace_selectors); 9020 } 9021 } 9022 9023 /* config hooks */ 9024 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 9025 struct cfg80211_auth_request *req) 9026 { 9027 struct ieee80211_local *local = sdata->local; 9028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9029 struct ieee80211_mgd_auth_data *auth_data; 9030 struct ieee80211_conn_settings conn; 9031 struct ieee80211_link_data *link; 9032 struct ieee80211_supported_band *sband; 9033 struct ieee80211_bss *bss; 9034 u16 auth_alg; 9035 int err; 9036 bool cont_auth, wmm_used; 9037 9038 lockdep_assert_wiphy(sdata->local->hw.wiphy); 9039 9040 /* prepare auth data structure */ 9041 9042 switch (req->auth_type) { 9043 case NL80211_AUTHTYPE_OPEN_SYSTEM: 9044 auth_alg = WLAN_AUTH_OPEN; 9045 break; 9046 case NL80211_AUTHTYPE_SHARED_KEY: 9047 if (fips_enabled) 9048 return -EOPNOTSUPP; 9049 auth_alg = WLAN_AUTH_SHARED_KEY; 9050 break; 9051 case NL80211_AUTHTYPE_FT: 9052 auth_alg = WLAN_AUTH_FT; 9053 break; 9054 case NL80211_AUTHTYPE_NETWORK_EAP: 9055 auth_alg = WLAN_AUTH_LEAP; 9056 break; 9057 case NL80211_AUTHTYPE_SAE: 9058 auth_alg = WLAN_AUTH_SAE; 9059 break; 9060 case NL80211_AUTHTYPE_FILS_SK: 9061 auth_alg = WLAN_AUTH_FILS_SK; 9062 break; 9063 case NL80211_AUTHTYPE_FILS_SK_PFS: 9064 auth_alg = WLAN_AUTH_FILS_SK_PFS; 9065 break; 9066 case NL80211_AUTHTYPE_FILS_PK: 9067 auth_alg = WLAN_AUTH_FILS_PK; 9068 break; 9069 default: 9070 return -EOPNOTSUPP; 9071 } 9072 9073 if (ifmgd->assoc_data) 9074 return -EBUSY; 9075 9076 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9077 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9078 return -EINVAL; 9079 } 9080 9081 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9082 req->ie_len, GFP_KERNEL); 9083 if (!auth_data) 9084 return -ENOMEM; 9085 9086 memcpy(auth_data->ap_addr, 9087 req->ap_mld_addr ?: req->bss->bssid, 9088 ETH_ALEN); 9089 auth_data->bss = req->bss; 9090 auth_data->link_id = req->link_id; 9091 9092 if (req->auth_data_len >= 4) { 9093 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9094 __le16 *pos = (__le16 *) req->auth_data; 9095 9096 auth_data->sae_trans = le16_to_cpu(pos[0]); 9097 auth_data->sae_status = le16_to_cpu(pos[1]); 9098 } 9099 memcpy(auth_data->data, req->auth_data + 4, 9100 req->auth_data_len - 4); 9101 auth_data->data_len += req->auth_data_len - 4; 9102 } 9103 9104 /* Check if continuing authentication or trying to authenticate with the 9105 * same BSS that we were in the process of authenticating with and avoid 9106 * removal and re-addition of the STA entry in 9107 * ieee80211_prep_connection(). 9108 */ 9109 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9110 ifmgd->auth_data->link_id == req->link_id; 9111 9112 if (req->ie && req->ie_len) { 9113 memcpy(&auth_data->data[auth_data->data_len], 9114 req->ie, req->ie_len); 9115 auth_data->data_len += req->ie_len; 9116 } 9117 9118 if (req->key && req->key_len) { 9119 auth_data->key_len = req->key_len; 9120 auth_data->key_idx = req->key_idx; 9121 memcpy(auth_data->key, req->key, req->key_len); 9122 } 9123 9124 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9125 req->supported_selectors, 9126 req->supported_selectors_len); 9127 9128 auth_data->algorithm = auth_alg; 9129 9130 /* try to authenticate/probe */ 9131 9132 if (ifmgd->auth_data) { 9133 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9134 auth_data->peer_confirmed = 9135 ifmgd->auth_data->peer_confirmed; 9136 } 9137 ieee80211_destroy_auth_data(sdata, cont_auth); 9138 } 9139 9140 /* prep auth_data so we don't go into idle on disassoc */ 9141 ifmgd->auth_data = auth_data; 9142 9143 /* If this is continuation of an ongoing SAE authentication exchange 9144 * (i.e., request to send SAE Confirm) and the peer has already 9145 * confirmed, mark authentication completed since we are about to send 9146 * out SAE Confirm. 9147 */ 9148 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9149 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9150 ieee80211_mark_sta_auth(sdata); 9151 9152 if (ifmgd->associated) { 9153 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9154 9155 sdata_info(sdata, 9156 "disconnect from AP %pM for new auth to %pM\n", 9157 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9158 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9159 WLAN_REASON_UNSPECIFIED, 9160 false, frame_buf); 9161 9162 ieee80211_report_disconnect(sdata, frame_buf, 9163 sizeof(frame_buf), true, 9164 WLAN_REASON_UNSPECIFIED, 9165 false); 9166 } 9167 9168 /* needed for transmitting the auth frame(s) properly */ 9169 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9170 9171 bss = (void *)req->bss->priv; 9172 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9173 9174 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9175 9176 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9177 &conn); 9178 9179 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9180 req->ap_mld_addr, cont_auth, 9181 &conn, false, 9182 auth_data->userspace_selectors); 9183 if (err) 9184 goto err_clear; 9185 9186 if (req->link_id >= 0) 9187 link = sdata_dereference(sdata->link[req->link_id], sdata); 9188 else 9189 link = &sdata->deflink; 9190 9191 if (WARN_ON(!link)) { 9192 err = -ENOLINK; 9193 goto err_clear; 9194 } 9195 9196 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9197 auth_data->ap_addr, link->conf->addr); 9198 9199 err = ieee80211_auth(sdata); 9200 if (err) { 9201 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9202 goto err_clear; 9203 } 9204 9205 /* hold our own reference */ 9206 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9207 return 0; 9208 9209 err_clear: 9210 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9211 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9212 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9213 BSS_CHANGED_BSSID); 9214 ieee80211_link_release_channel(&sdata->deflink); 9215 } 9216 ifmgd->auth_data = NULL; 9217 kfree(auth_data); 9218 return err; 9219 } 9220 9221 static void 9222 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9223 struct ieee80211_mgd_assoc_data *assoc_data, 9224 struct cfg80211_assoc_request *req, 9225 struct ieee80211_conn_settings *conn, 9226 unsigned int link_id) 9227 { 9228 struct ieee80211_local *local = sdata->local; 9229 const struct cfg80211_bss_ies *bss_ies; 9230 struct ieee80211_supported_band *sband; 9231 struct ieee80211_link_data *link; 9232 struct cfg80211_bss *cbss; 9233 struct ieee80211_bss *bss; 9234 9235 cbss = assoc_data->link[link_id].bss; 9236 if (WARN_ON(!cbss)) 9237 return; 9238 9239 bss = (void *)cbss->priv; 9240 9241 sband = local->hw.wiphy->bands[cbss->channel->band]; 9242 if (WARN_ON(!sband)) 9243 return; 9244 9245 link = sdata_dereference(sdata->link[link_id], sdata); 9246 if (WARN_ON(!link)) 9247 return; 9248 9249 /* for MLO connections assume advertising all rates is OK */ 9250 if (!req->ap_mld_addr) { 9251 assoc_data->supp_rates = bss->supp_rates; 9252 assoc_data->supp_rates_len = bss->supp_rates_len; 9253 } 9254 9255 /* copy and link elems for the STA profile */ 9256 if (req->links[link_id].elems_len) { 9257 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9258 req->links[link_id].elems_len); 9259 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9260 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9261 assoc_data->ie_pos += req->links[link_id].elems_len; 9262 } 9263 9264 link->u.mgd.beacon_crc_valid = false; 9265 link->u.mgd.dtim_period = 0; 9266 link->u.mgd.have_beacon = false; 9267 9268 /* override HT configuration only if the AP and we support it */ 9269 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9270 struct ieee80211_sta_ht_cap sta_ht_cap; 9271 9272 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9273 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9274 } 9275 9276 rcu_read_lock(); 9277 bss_ies = rcu_dereference(cbss->beacon_ies); 9278 if (bss_ies) { 9279 u8 dtim_count = 0; 9280 9281 ieee80211_get_dtim(bss_ies, &dtim_count, 9282 &link->u.mgd.dtim_period); 9283 9284 sdata->deflink.u.mgd.have_beacon = true; 9285 9286 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9287 link->conf->sync_tsf = bss_ies->tsf; 9288 link->conf->sync_device_ts = bss->device_ts_beacon; 9289 link->conf->sync_dtim_count = dtim_count; 9290 } 9291 } else { 9292 bss_ies = rcu_dereference(cbss->ies); 9293 } 9294 9295 if (bss_ies) { 9296 const struct element *elem; 9297 9298 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9299 bss_ies->data, bss_ies->len); 9300 if (elem && elem->datalen >= 3) 9301 link->conf->profile_periodicity = elem->data[2]; 9302 else 9303 link->conf->profile_periodicity = 0; 9304 9305 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9306 bss_ies->data, bss_ies->len); 9307 if (elem && elem->datalen >= 11 && 9308 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9309 link->conf->ema_ap = true; 9310 else 9311 link->conf->ema_ap = false; 9312 } 9313 rcu_read_unlock(); 9314 9315 if (bss->corrupt_data) { 9316 char *corrupt_type = "data"; 9317 9318 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9319 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9320 corrupt_type = "beacon and probe response"; 9321 else 9322 corrupt_type = "beacon"; 9323 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9324 corrupt_type = "probe response"; 9325 } 9326 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9327 cbss->bssid, corrupt_type); 9328 } 9329 9330 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9331 if (sdata->u.mgd.powersave) 9332 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9333 else 9334 link->smps_mode = IEEE80211_SMPS_OFF; 9335 } else { 9336 link->smps_mode = link->u.mgd.req_smps; 9337 } 9338 } 9339 9340 static int 9341 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9342 struct ieee80211_mgd_assoc_data *assoc_data, 9343 int link_id) 9344 { 9345 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9346 enum nl80211_band band = cbss->channel->band; 9347 struct ieee80211_supported_band *sband; 9348 const struct element *elem; 9349 int err; 9350 9351 /* neither HT nor VHT elements used on 6 GHz */ 9352 if (band == NL80211_BAND_6GHZ) 9353 return 0; 9354 9355 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9356 return 0; 9357 9358 rcu_read_lock(); 9359 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9360 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9361 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9362 cbss->bssid); 9363 err = -EINVAL; 9364 goto out_rcu; 9365 } 9366 assoc_data->link[link_id].ap_ht_param = 9367 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9368 rcu_read_unlock(); 9369 9370 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9371 return 0; 9372 9373 /* some drivers want to support VHT on 2.4 GHz even */ 9374 sband = sdata->local->hw.wiphy->bands[band]; 9375 if (!sband->vht_cap.vht_supported) 9376 return 0; 9377 9378 rcu_read_lock(); 9379 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9380 /* but even then accept it not being present on the AP */ 9381 if (!elem && band == NL80211_BAND_2GHZ) { 9382 err = 0; 9383 goto out_rcu; 9384 } 9385 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9386 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9387 cbss->bssid); 9388 err = -EINVAL; 9389 goto out_rcu; 9390 } 9391 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9392 sizeof(struct ieee80211_vht_cap)); 9393 rcu_read_unlock(); 9394 9395 return 0; 9396 out_rcu: 9397 rcu_read_unlock(); 9398 return err; 9399 } 9400 9401 static bool 9402 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(struct cfg80211_assoc_request *req) 9403 { 9404 const struct cfg80211_bss_ies *ies; 9405 struct cfg80211_bss *bss; 9406 const struct element *ml; 9407 9408 /* not an MLO connection if link_id < 0, so irrelevant */ 9409 if (req->link_id < 0) 9410 return false; 9411 9412 bss = req->links[req->link_id].bss; 9413 9414 guard(rcu)(); 9415 ies = rcu_dereference(bss->ies); 9416 for_each_element_extid(ml, WLAN_EID_EXT_EHT_MULTI_LINK, 9417 ies->data, ies->len) { 9418 const struct ieee80211_multi_link_elem *mle; 9419 9420 if (!ieee80211_mle_type_ok(ml->data + 1, 9421 IEEE80211_ML_CONTROL_TYPE_BASIC, 9422 ml->datalen - 1)) 9423 continue; 9424 9425 mle = (void *)(ml->data + 1); 9426 if (mle->control & cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP)) 9427 return true; 9428 } 9429 9430 return false; 9431 9432 } 9433 9434 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9435 struct cfg80211_assoc_request *req) 9436 { 9437 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9438 struct ieee80211_local *local = sdata->local; 9439 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9440 struct ieee80211_mgd_assoc_data *assoc_data; 9441 const struct element *ssid_elem; 9442 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9443 struct ieee80211_link_data *link; 9444 struct cfg80211_bss *cbss; 9445 bool override, uapsd_supported; 9446 bool match_auth; 9447 int i, err; 9448 size_t size = sizeof(*assoc_data) + req->ie_len; 9449 9450 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9451 size += req->links[i].elems_len; 9452 9453 /* FIXME: no support for 4-addr MLO yet */ 9454 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9455 return -EOPNOTSUPP; 9456 9457 assoc_data = kzalloc(size, GFP_KERNEL); 9458 if (!assoc_data) 9459 return -ENOMEM; 9460 9461 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9462 9463 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9464 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9465 err = -EINVAL; 9466 goto err_free; 9467 } 9468 9469 rcu_read_lock(); 9470 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9471 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9472 rcu_read_unlock(); 9473 err = -EINVAL; 9474 goto err_free; 9475 } 9476 9477 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9478 assoc_data->ssid_len = ssid_elem->datalen; 9479 rcu_read_unlock(); 9480 9481 if (req->ap_mld_addr) 9482 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9483 else 9484 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9485 9486 /* 9487 * Many APs have broken parsing of the extended MLD capa/ops field, 9488 * dropping (re-)association request frames or replying with association 9489 * response with a failure status if it's present. 9490 * Set our value from the userspace request only in strict mode or if 9491 * the AP also had that field present. 9492 */ 9493 if (ieee80211_hw_check(&local->hw, STRICT) || 9494 ieee80211_mgd_assoc_bss_has_mld_ext_capa_ops(req)) 9495 assoc_data->ext_mld_capa_ops = 9496 cpu_to_le16(req->ext_mld_capa_ops); 9497 9498 if (ifmgd->associated) { 9499 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9500 9501 sdata_info(sdata, 9502 "disconnect from AP %pM for new assoc to %pM\n", 9503 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9504 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9505 WLAN_REASON_UNSPECIFIED, 9506 false, frame_buf); 9507 9508 ieee80211_report_disconnect(sdata, frame_buf, 9509 sizeof(frame_buf), true, 9510 WLAN_REASON_UNSPECIFIED, 9511 false); 9512 } 9513 9514 memset(sdata->u.mgd.userspace_selectors, 0, 9515 sizeof(sdata->u.mgd.userspace_selectors)); 9516 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9517 req->supported_selectors, 9518 req->supported_selectors_len); 9519 9520 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9521 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9522 sizeof(ifmgd->ht_capa_mask)); 9523 9524 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9525 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9526 sizeof(ifmgd->vht_capa_mask)); 9527 9528 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9529 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9530 sizeof(ifmgd->s1g_capa_mask)); 9531 9532 /* keep some setup (AP STA, channel, ...) if matching */ 9533 match_auth = ifmgd->auth_data && 9534 ether_addr_equal(ifmgd->auth_data->ap_addr, 9535 assoc_data->ap_addr) && 9536 ifmgd->auth_data->link_id == req->link_id; 9537 9538 if (req->ap_mld_addr) { 9539 uapsd_supported = true; 9540 9541 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9542 ASSOC_REQ_DISABLE_VHT | 9543 ASSOC_REQ_DISABLE_HE | 9544 ASSOC_REQ_DISABLE_EHT)) { 9545 err = -EINVAL; 9546 goto err_free; 9547 } 9548 9549 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9550 struct ieee80211_supported_band *sband; 9551 struct cfg80211_bss *link_cbss = req->links[i].bss; 9552 struct ieee80211_bss *bss; 9553 9554 if (!link_cbss) 9555 continue; 9556 9557 bss = (void *)link_cbss->priv; 9558 9559 if (!bss->wmm_used) { 9560 err = -EINVAL; 9561 req->links[i].error = err; 9562 goto err_free; 9563 } 9564 9565 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9566 err = -EINVAL; 9567 req->links[i].error = err; 9568 goto err_free; 9569 } 9570 9571 link = sdata_dereference(sdata->link[i], sdata); 9572 if (link) 9573 ether_addr_copy(assoc_data->link[i].addr, 9574 link->conf->addr); 9575 else 9576 eth_random_addr(assoc_data->link[i].addr); 9577 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9578 9579 if (match_auth && i == assoc_link_id && link) 9580 assoc_data->link[i].conn = link->u.mgd.conn; 9581 else 9582 assoc_data->link[i].conn = 9583 ieee80211_conn_settings_unlimited; 9584 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9585 req, true, i, 9586 &assoc_data->link[i].conn); 9587 assoc_data->link[i].bss = link_cbss; 9588 assoc_data->link[i].disabled = req->links[i].disabled; 9589 9590 if (!bss->uapsd_supported) 9591 uapsd_supported = false; 9592 9593 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9594 err = -EINVAL; 9595 req->links[i].error = err; 9596 goto err_free; 9597 } 9598 9599 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9600 assoc_data, i); 9601 if (err) { 9602 err = -EINVAL; 9603 req->links[i].error = err; 9604 goto err_free; 9605 } 9606 } 9607 9608 assoc_data->wmm = true; 9609 } else { 9610 struct ieee80211_supported_band *sband; 9611 struct ieee80211_bss *bss = (void *)cbss->priv; 9612 9613 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9614 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9615 9616 assoc_data->wmm = bss->wmm_used && 9617 (local->hw.queues >= IEEE80211_NUM_ACS); 9618 9619 if (cbss->channel->band == NL80211_BAND_6GHZ && 9620 req->flags & (ASSOC_REQ_DISABLE_HT | 9621 ASSOC_REQ_DISABLE_VHT | 9622 ASSOC_REQ_DISABLE_HE)) { 9623 err = -EINVAL; 9624 goto err_free; 9625 } 9626 9627 sband = local->hw.wiphy->bands[cbss->channel->band]; 9628 9629 assoc_data->link[0].bss = cbss; 9630 9631 if (match_auth) 9632 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9633 else 9634 assoc_data->link[0].conn = 9635 ieee80211_conn_settings_unlimited; 9636 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9637 assoc_data->wmm, 0, 9638 &assoc_data->link[0].conn); 9639 9640 uapsd_supported = bss->uapsd_supported; 9641 9642 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9643 if (err) 9644 goto err_free; 9645 } 9646 9647 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9648 9649 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9650 err = -EBUSY; 9651 goto err_free; 9652 } 9653 9654 if (ifmgd->assoc_data) { 9655 err = -EBUSY; 9656 goto err_free; 9657 } 9658 9659 /* Cleanup is delayed if auth_data matches */ 9660 if (ifmgd->auth_data && !match_auth) 9661 ieee80211_destroy_auth_data(sdata, false); 9662 9663 if (req->ie && req->ie_len) { 9664 memcpy(assoc_data->ie, req->ie, req->ie_len); 9665 assoc_data->ie_len = req->ie_len; 9666 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9667 } else { 9668 assoc_data->ie_pos = assoc_data->ie; 9669 } 9670 9671 if (req->fils_kek) { 9672 /* should already be checked in cfg80211 - so warn */ 9673 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9674 err = -EINVAL; 9675 goto err_free; 9676 } 9677 memcpy(assoc_data->fils_kek, req->fils_kek, 9678 req->fils_kek_len); 9679 assoc_data->fils_kek_len = req->fils_kek_len; 9680 } 9681 9682 if (req->fils_nonces) 9683 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9684 2 * FILS_NONCE_LEN); 9685 9686 /* default timeout */ 9687 assoc_data->timeout = jiffies; 9688 assoc_data->timeout_started = true; 9689 9690 assoc_data->assoc_link_id = assoc_link_id; 9691 9692 if (req->ap_mld_addr) { 9693 /* if there was no authentication, set up the link */ 9694 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9695 if (err) 9696 goto err_clear; 9697 } 9698 9699 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9700 if (WARN_ON(!link)) { 9701 err = -EINVAL; 9702 goto err_clear; 9703 } 9704 9705 override = link->u.mgd.conn.mode != 9706 assoc_data->link[assoc_link_id].conn.mode || 9707 link->u.mgd.conn.bw_limit != 9708 assoc_data->link[assoc_link_id].conn.bw_limit; 9709 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9710 9711 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9712 assoc_link_id); 9713 9714 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9715 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9716 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9717 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9718 9719 if (assoc_data->wmm && uapsd_supported && 9720 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9721 assoc_data->uapsd = true; 9722 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9723 } else { 9724 assoc_data->uapsd = false; 9725 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9726 } 9727 9728 if (req->prev_bssid) 9729 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9730 9731 if (req->use_mfp) { 9732 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9733 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9734 } else { 9735 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9736 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9737 } 9738 9739 if (req->flags & ASSOC_REQ_USE_RRM) 9740 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9741 else 9742 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9743 9744 if (req->crypto.control_port) 9745 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9746 else 9747 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9748 9749 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9750 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9751 sdata->control_port_over_nl80211 = 9752 req->crypto.control_port_over_nl80211; 9753 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9754 9755 /* kick off associate process */ 9756 ifmgd->assoc_data = assoc_data; 9757 9758 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9759 if (!assoc_data->link[i].bss) 9760 continue; 9761 if (i == assoc_data->assoc_link_id) 9762 continue; 9763 /* only calculate the mode, hence link == NULL */ 9764 err = ieee80211_prep_channel(sdata, NULL, i, 9765 assoc_data->link[i].bss, true, 9766 &assoc_data->link[i].conn, 9767 sdata->u.mgd.userspace_selectors); 9768 if (err) { 9769 req->links[i].error = err; 9770 goto err_clear; 9771 } 9772 } 9773 9774 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9775 vif_cfg->ssid_len = assoc_data->ssid_len; 9776 9777 /* needed for transmitting the assoc frames properly */ 9778 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9779 9780 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9781 req->ap_mld_addr, true, 9782 &assoc_data->link[assoc_link_id].conn, 9783 override, 9784 sdata->u.mgd.userspace_selectors); 9785 if (err) 9786 goto err_clear; 9787 9788 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9789 const struct cfg80211_bss_ies *beacon_ies; 9790 9791 rcu_read_lock(); 9792 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9793 if (!beacon_ies) { 9794 /* 9795 * Wait up to one beacon interval ... 9796 * should this be more if we miss one? 9797 */ 9798 sdata_info(sdata, "waiting for beacon from %pM\n", 9799 link->u.mgd.bssid); 9800 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9801 assoc_data->timeout_started = true; 9802 assoc_data->need_beacon = true; 9803 } 9804 rcu_read_unlock(); 9805 } 9806 9807 run_again(sdata, assoc_data->timeout); 9808 9809 /* We are associating, clean up auth_data */ 9810 if (ifmgd->auth_data) 9811 ieee80211_destroy_auth_data(sdata, true); 9812 9813 return 0; 9814 err_clear: 9815 if (!ifmgd->auth_data) { 9816 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9817 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9818 BSS_CHANGED_BSSID); 9819 } 9820 ifmgd->assoc_data = NULL; 9821 err_free: 9822 kfree(assoc_data); 9823 return err; 9824 } 9825 9826 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9827 struct cfg80211_deauth_request *req) 9828 { 9829 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9830 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9831 bool tx = !req->local_state_change; 9832 struct ieee80211_prep_tx_info info = { 9833 .subtype = IEEE80211_STYPE_DEAUTH, 9834 }; 9835 9836 if (ifmgd->auth_data && 9837 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9838 sdata_info(sdata, 9839 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9840 req->bssid, req->reason_code, 9841 ieee80211_get_reason_code_string(req->reason_code)); 9842 9843 info.link_id = ifmgd->auth_data->link_id; 9844 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9845 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9846 IEEE80211_STYPE_DEAUTH, 9847 req->reason_code, tx, 9848 frame_buf); 9849 ieee80211_destroy_auth_data(sdata, false); 9850 ieee80211_report_disconnect(sdata, frame_buf, 9851 sizeof(frame_buf), true, 9852 req->reason_code, false); 9853 drv_mgd_complete_tx(sdata->local, sdata, &info); 9854 return 0; 9855 } 9856 9857 if (ifmgd->assoc_data && 9858 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9859 sdata_info(sdata, 9860 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9861 req->bssid, req->reason_code, 9862 ieee80211_get_reason_code_string(req->reason_code)); 9863 9864 info.link_id = ifmgd->assoc_data->assoc_link_id; 9865 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9866 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9867 IEEE80211_STYPE_DEAUTH, 9868 req->reason_code, tx, 9869 frame_buf); 9870 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9871 ieee80211_report_disconnect(sdata, frame_buf, 9872 sizeof(frame_buf), true, 9873 req->reason_code, false); 9874 drv_mgd_complete_tx(sdata->local, sdata, &info); 9875 return 0; 9876 } 9877 9878 if (ifmgd->associated && 9879 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9880 sdata_info(sdata, 9881 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9882 req->bssid, req->reason_code, 9883 ieee80211_get_reason_code_string(req->reason_code)); 9884 9885 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9886 req->reason_code, tx, frame_buf); 9887 ieee80211_report_disconnect(sdata, frame_buf, 9888 sizeof(frame_buf), true, 9889 req->reason_code, false); 9890 return 0; 9891 } 9892 9893 return -ENOTCONN; 9894 } 9895 9896 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9897 struct cfg80211_disassoc_request *req) 9898 { 9899 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9900 9901 if (!sdata->u.mgd.associated || 9902 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9903 return -ENOTCONN; 9904 9905 sdata_info(sdata, 9906 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9907 req->ap_addr, req->reason_code, 9908 ieee80211_get_reason_code_string(req->reason_code)); 9909 9910 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9911 req->reason_code, !req->local_state_change, 9912 frame_buf); 9913 9914 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9915 req->reason_code, false); 9916 9917 return 0; 9918 } 9919 9920 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9921 { 9922 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9923 &link->u.mgd.request_smps_work); 9924 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9925 &link->u.mgd.recalc_smps); 9926 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9927 &link->u.mgd.csa.switch_work); 9928 } 9929 9930 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9931 { 9932 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9933 9934 /* 9935 * Make sure some work items will not run after this, 9936 * they will not do anything but might not have been 9937 * cancelled when disconnecting. 9938 */ 9939 wiphy_work_cancel(sdata->local->hw.wiphy, 9940 &ifmgd->monitor_work); 9941 wiphy_work_cancel(sdata->local->hw.wiphy, 9942 &ifmgd->beacon_connection_loss_work); 9943 wiphy_work_cancel(sdata->local->hw.wiphy, 9944 &ifmgd->csa_connection_drop_work); 9945 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9946 &ifmgd->tdls_peer_del_work); 9947 9948 if (ifmgd->assoc_data) 9949 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9950 if (ifmgd->auth_data) 9951 ieee80211_destroy_auth_data(sdata, false); 9952 spin_lock_bh(&ifmgd->teardown_lock); 9953 if (ifmgd->teardown_skb) { 9954 kfree_skb(ifmgd->teardown_skb); 9955 ifmgd->teardown_skb = NULL; 9956 ifmgd->orig_teardown_skb = NULL; 9957 } 9958 kfree(ifmgd->assoc_req_ies); 9959 ifmgd->assoc_req_ies = NULL; 9960 ifmgd->assoc_req_ies_len = 0; 9961 spin_unlock_bh(&ifmgd->teardown_lock); 9962 timer_delete_sync(&ifmgd->timer); 9963 } 9964 9965 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9966 enum nl80211_cqm_rssi_threshold_event rssi_event, 9967 s32 rssi_level, 9968 gfp_t gfp) 9969 { 9970 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9971 9972 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9973 9974 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9975 } 9976 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9977 9978 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9979 { 9980 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9981 9982 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9983 9984 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9985 } 9986 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9987 9988 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9989 int rssi_min_thold, 9990 int rssi_max_thold) 9991 { 9992 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9993 9994 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9995 return; 9996 9997 /* 9998 * Scale up threshold values before storing it, as the RSSI averaging 9999 * algorithm uses a scaled up value as well. Change this scaling 10000 * factor if the RSSI averaging algorithm changes. 10001 */ 10002 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 10003 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 10004 } 10005 10006 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 10007 int rssi_min_thold, 10008 int rssi_max_thold) 10009 { 10010 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10011 10012 WARN_ON(rssi_min_thold == rssi_max_thold || 10013 rssi_min_thold > rssi_max_thold); 10014 10015 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 10016 rssi_max_thold); 10017 } 10018 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 10019 10020 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 10021 { 10022 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 10023 10024 _ieee80211_enable_rssi_reports(sdata, 0, 0); 10025 } 10026 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 10027 10028 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 10029 struct ieee80211_mgmt *mgmt, size_t len) 10030 { 10031 struct ieee80211_local *local = sdata->local; 10032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 10033 struct ieee80211_mgd_assoc_data *add_links_data = 10034 ifmgd->reconf.add_links_data; 10035 struct sta_info *sta; 10036 struct cfg80211_mlo_reconf_done_data done_data = {}; 10037 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 10038 sdata->u.mgd.reconf.removed_links; 10039 u16 link_mask, valid_links; 10040 unsigned int link_id; 10041 size_t orig_len = len; 10042 u8 i, group_key_data_len; 10043 u8 *pos; 10044 10045 if (!ieee80211_vif_is_mld(&sdata->vif) || 10046 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 10047 mgmt->u.action.u.ml_reconf_resp.dialog_token != 10048 sdata->u.mgd.reconf.dialog_token || 10049 !sta_changed_links) 10050 return; 10051 10052 pos = mgmt->u.action.u.ml_reconf_resp.variable; 10053 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 10054 10055 /* each status duple is 3 octets */ 10056 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 10057 sdata_info(sdata, 10058 "mlo: reconf: unexpected len=%zu, count=%u\n", 10059 len, mgmt->u.action.u.ml_reconf_resp.count); 10060 goto disconnect; 10061 } 10062 10063 link_mask = sta_changed_links; 10064 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 10065 u16 status = get_unaligned_le16(pos + 1); 10066 10067 link_id = *pos; 10068 10069 if (!(link_mask & BIT(link_id))) { 10070 sdata_info(sdata, 10071 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 10072 link_id, sta_changed_links); 10073 goto disconnect; 10074 } 10075 10076 /* clear the corresponding link, to detect the case that 10077 * the same link was included more than one time 10078 */ 10079 link_mask &= ~BIT(link_id); 10080 10081 /* Handle failure to remove links here. Failure to remove added 10082 * links will be done later in the flow. 10083 */ 10084 if (status != WLAN_STATUS_SUCCESS) { 10085 sdata_info(sdata, 10086 "mlo: reconf: failed on link=%u, status=%u\n", 10087 link_id, status); 10088 10089 /* The AP MLD failed to remove a link that was already 10090 * removed locally. As this is not expected behavior, 10091 * disconnect 10092 */ 10093 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 10094 goto disconnect; 10095 10096 /* The AP MLD failed to add a link. Remove it from the 10097 * added links. 10098 */ 10099 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 10100 } 10101 10102 pos += 3; 10103 len -= 3; 10104 } 10105 10106 if (link_mask) { 10107 sdata_info(sdata, 10108 "mlo: reconf: no response for links=0x%x\n", 10109 link_mask); 10110 goto disconnect; 10111 } 10112 10113 if (!sdata->u.mgd.reconf.added_links) 10114 goto out; 10115 10116 if (len < 1 || len < 1 + *pos) { 10117 sdata_info(sdata, 10118 "mlo: reconf: invalid group key data length"); 10119 goto disconnect; 10120 } 10121 10122 /* The Group Key Data field must be present when links are added. This 10123 * field should be processed by userland. 10124 */ 10125 group_key_data_len = *pos++; 10126 10127 pos += group_key_data_len; 10128 len -= group_key_data_len + 1; 10129 10130 /* Process the information for the added links */ 10131 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10132 if (WARN_ON(!sta)) 10133 goto disconnect; 10134 10135 valid_links = sdata->vif.valid_links; 10136 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10137 if (!add_links_data->link[link_id].bss || 10138 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10139 continue; 10140 10141 valid_links |= BIT(link_id); 10142 if (ieee80211_sta_allocate_link(sta, link_id)) 10143 goto disconnect; 10144 } 10145 10146 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10147 link_mask = 0; 10148 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10149 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10150 struct ieee80211_link_data *link; 10151 struct link_sta_info *link_sta; 10152 u64 changed = 0; 10153 10154 if (!cbss) 10155 continue; 10156 10157 link = sdata_dereference(sdata->link[link_id], sdata); 10158 if (WARN_ON(!link)) 10159 goto disconnect; 10160 10161 link_info(link, 10162 "mlo: reconf: local address %pM, AP link address %pM\n", 10163 add_links_data->link[link_id].addr, 10164 add_links_data->link[link_id].bss->bssid); 10165 10166 link_sta = rcu_dereference_protected(sta->link[link_id], 10167 lockdep_is_held(&local->hw.wiphy->mtx)); 10168 if (WARN_ON(!link_sta)) 10169 goto disconnect; 10170 10171 if (!link->u.mgd.have_beacon) { 10172 const struct cfg80211_bss_ies *ies; 10173 10174 rcu_read_lock(); 10175 ies = rcu_dereference(cbss->beacon_ies); 10176 if (ies) 10177 link->u.mgd.have_beacon = true; 10178 else 10179 ies = rcu_dereference(cbss->ies); 10180 ieee80211_get_dtim(ies, 10181 &link->conf->sync_dtim_count, 10182 &link->u.mgd.dtim_period); 10183 link->conf->beacon_int = cbss->beacon_interval; 10184 rcu_read_unlock(); 10185 } 10186 10187 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10188 10189 link->u.mgd.conn = add_links_data->link[link_id].conn; 10190 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10191 true, &link->u.mgd.conn, 10192 sdata->u.mgd.userspace_selectors)) { 10193 link_info(link, "mlo: reconf: prep_channel failed\n"); 10194 goto disconnect; 10195 } 10196 10197 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10198 add_links_data->link[link_id].bss)) 10199 goto disconnect; 10200 10201 if (!ieee80211_assoc_config_link(link, link_sta, 10202 add_links_data->link[link_id].bss, 10203 mgmt, pos, len, 10204 &changed)) 10205 goto disconnect; 10206 10207 /* The AP MLD indicated success for this link, but the station 10208 * profile status indicated otherwise. Since there is an 10209 * inconsistency in the ML reconfiguration response, disconnect 10210 */ 10211 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10212 goto disconnect; 10213 10214 ieee80211_sta_init_nss(link_sta); 10215 if (ieee80211_sta_activate_link(sta, link_id)) 10216 goto disconnect; 10217 10218 changed |= ieee80211_link_set_associated(link, cbss); 10219 ieee80211_link_info_change_notify(sdata, link, changed); 10220 10221 ieee80211_recalc_smps(sdata, link); 10222 link_mask |= BIT(link_id); 10223 } 10224 10225 sdata_info(sdata, 10226 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10227 valid_links, link_mask); 10228 10229 /* links might have changed due to rejected ones, set them again */ 10230 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10231 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10232 10233 ieee80211_recalc_ps(local); 10234 ieee80211_recalc_ps_vif(sdata); 10235 10236 done_data.buf = (const u8 *)mgmt; 10237 done_data.len = orig_len; 10238 done_data.added_links = link_mask; 10239 10240 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10241 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10242 done_data.links[link_id].addr = 10243 add_links_data->link[link_id].addr; 10244 } 10245 10246 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10247 kfree(sdata->u.mgd.reconf.add_links_data); 10248 sdata->u.mgd.reconf.add_links_data = NULL; 10249 out: 10250 ieee80211_ml_reconf_reset(sdata); 10251 return; 10252 10253 disconnect: 10254 __ieee80211_disconnect(sdata); 10255 } 10256 10257 static struct sk_buff * 10258 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10259 struct ieee80211_mgd_assoc_data *add_links_data, 10260 u16 removed_links, __le16 ext_mld_capa_ops) 10261 { 10262 struct ieee80211_local *local = sdata->local; 10263 struct ieee80211_mgmt *mgmt; 10264 struct ieee80211_multi_link_elem *ml_elem; 10265 struct ieee80211_mle_basic_common_info *common; 10266 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10267 struct sk_buff *skb; 10268 size_t size; 10269 unsigned int link_id; 10270 __le16 eml_capa = 0, mld_capa_ops = 0; 10271 struct ieee80211_tx_info *info; 10272 u8 common_size, var_common_size; 10273 u8 *ml_elem_len; 10274 u16 capab = 0; 10275 10276 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10277 10278 /* Consider the maximal length of the reconfiguration ML element */ 10279 size += sizeof(struct ieee80211_multi_link_elem); 10280 10281 /* The Basic ML element and the Reconfiguration ML element have the same 10282 * fixed common information fields in the context of ML reconfiguration 10283 * action frame. The AP MLD MAC address must always be present 10284 */ 10285 common_size = sizeof(*common); 10286 10287 /* when adding links, the MLD capabilities must be present */ 10288 var_common_size = 0; 10289 if (add_links_data) { 10290 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10291 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10292 ieee80211_vif_type_p2p(&sdata->vif)); 10293 10294 if (ift_ext_capa) { 10295 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10296 mld_capa_ops = 10297 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10298 } 10299 10300 /* MLD capabilities and operation */ 10301 var_common_size += 2; 10302 10303 /* EML capabilities */ 10304 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10305 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10306 var_common_size += 2; 10307 } 10308 10309 if (ext_mld_capa_ops) 10310 var_common_size += 2; 10311 10312 /* Add the common information length */ 10313 size += common_size + var_common_size; 10314 10315 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10316 struct cfg80211_bss *cbss; 10317 size_t elems_len; 10318 10319 if (removed_links & BIT(link_id)) { 10320 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10321 ETH_ALEN; 10322 continue; 10323 } 10324 10325 if (!add_links_data || !add_links_data->link[link_id].bss) 10326 continue; 10327 10328 elems_len = add_links_data->link[link_id].elems_len; 10329 cbss = add_links_data->link[link_id].bss; 10330 10331 /* should be the same across all BSSes */ 10332 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10333 capab |= WLAN_CAPABILITY_PRIVACY; 10334 10335 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10336 ETH_ALEN; 10337 10338 /* WMM */ 10339 size += 9; 10340 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10341 elems_len); 10342 } 10343 10344 skb = alloc_skb(size, GFP_KERNEL); 10345 if (!skb) 10346 return NULL; 10347 10348 skb_reserve(skb, local->hw.extra_tx_headroom); 10349 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10350 u.action.u.ml_reconf_req)); 10351 10352 /* Add the MAC header */ 10353 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10354 IEEE80211_STYPE_ACTION); 10355 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10356 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10357 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10358 10359 /* Add the action frame fixed fields */ 10360 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10361 mgmt->u.action.u.ml_reconf_req.action_code = 10362 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10363 10364 /* allocate a dialog token and store it */ 10365 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10366 mgmt->u.action.u.ml_reconf_req.dialog_token = 10367 sdata->u.mgd.reconf.dialog_token; 10368 10369 /* Add the ML reconfiguration element and the common information */ 10370 skb_put_u8(skb, WLAN_EID_EXTENSION); 10371 ml_elem_len = skb_put(skb, 1); 10372 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10373 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10374 ml_elem->control = 10375 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10376 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10377 common = skb_put(skb, common_size); 10378 common->len = common_size + var_common_size; 10379 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10380 10381 if (add_links_data) { 10382 if (eml_capa & 10383 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10384 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10385 ml_elem->control |= 10386 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10387 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10388 } 10389 10390 ml_elem->control |= 10391 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10392 10393 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10394 } 10395 10396 if (ext_mld_capa_ops) { 10397 ml_elem->control |= 10398 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10399 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10400 } 10401 10402 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10403 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10404 10405 /* Add the per station profile */ 10406 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10407 u8 *subelem_len = NULL; 10408 u16 ctrl; 10409 const u8 *addr; 10410 10411 /* Skip links that are not changing */ 10412 if (!(removed_links & BIT(link_id)) && 10413 (!add_links_data || !add_links_data->link[link_id].bss)) 10414 continue; 10415 10416 ctrl = link_id | 10417 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10418 10419 if (removed_links & BIT(link_id)) { 10420 struct ieee80211_bss_conf *conf = 10421 sdata_dereference(sdata->vif.link_conf[link_id], 10422 sdata); 10423 if (!conf) 10424 continue; 10425 10426 addr = conf->addr; 10427 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10428 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10429 } else { 10430 addr = add_links_data->link[link_id].addr; 10431 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10432 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10433 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10434 } 10435 10436 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10437 subelem_len = skb_put(skb, 1); 10438 10439 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10440 skb_put_u8(skb, 1 + ETH_ALEN); 10441 skb_put_data(skb, addr, ETH_ALEN); 10442 10443 if (!(removed_links & BIT(link_id))) { 10444 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10445 size_t extra_used; 10446 void *capab_pos; 10447 u8 qos_info; 10448 10449 capab_pos = skb_put(skb, 2); 10450 10451 extra_used = 10452 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10453 add_links_data->link[link_id].elems, 10454 add_links_data->link[link_id].elems_len, 10455 link_id, NULL, 10456 link_present_elems, 10457 add_links_data); 10458 10459 if (add_links_data->link[link_id].elems) 10460 skb_put_data(skb, 10461 add_links_data->link[link_id].elems + 10462 extra_used, 10463 add_links_data->link[link_id].elems_len - 10464 extra_used); 10465 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10466 qos_info = sdata->u.mgd.uapsd_queues; 10467 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10468 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10469 } else { 10470 qos_info = 0; 10471 } 10472 10473 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10474 put_unaligned_le16(capab, capab_pos); 10475 } 10476 10477 ieee80211_fragment_element(skb, subelem_len, 10478 IEEE80211_MLE_SUBELEM_FRAGMENT); 10479 } 10480 10481 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10482 10483 info = IEEE80211_SKB_CB(skb); 10484 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10485 10486 return skb; 10487 } 10488 10489 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10490 struct cfg80211_ml_reconf_req *req) 10491 { 10492 struct ieee80211_local *local = sdata->local; 10493 struct ieee80211_mgd_assoc_data *data = NULL; 10494 struct sta_info *sta; 10495 struct sk_buff *skb; 10496 u16 added_links, new_valid_links; 10497 int link_id, err; 10498 10499 if (!ieee80211_vif_is_mld(&sdata->vif) || 10500 !(sdata->vif.cfg.mld_capa_op & 10501 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10502 return -EINVAL; 10503 10504 /* No support for concurrent ML reconfiguration operation */ 10505 if (sdata->u.mgd.reconf.added_links || 10506 sdata->u.mgd.reconf.removed_links) 10507 return -EBUSY; 10508 10509 added_links = 0; 10510 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10511 if (!req->add_links[link_id].bss) 10512 continue; 10513 10514 added_links |= BIT(link_id); 10515 } 10516 10517 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10518 if (WARN_ON(!sta)) 10519 return -ENOLINK; 10520 10521 /* Adding links to the set of valid link is done only after a successful 10522 * ML reconfiguration frame exchange. Here prepare the data for the ML 10523 * reconfiguration frame construction and allocate the required 10524 * resources 10525 */ 10526 if (added_links) { 10527 bool uapsd_supported; 10528 10529 data = kzalloc(sizeof(*data), GFP_KERNEL); 10530 if (!data) 10531 return -ENOMEM; 10532 10533 data->assoc_link_id = -1; 10534 data->wmm = true; 10535 10536 uapsd_supported = true; 10537 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10538 link_id++) { 10539 struct ieee80211_supported_band *sband; 10540 struct cfg80211_bss *link_cbss = 10541 req->add_links[link_id].bss; 10542 struct ieee80211_bss *bss; 10543 10544 if (!link_cbss) 10545 continue; 10546 10547 bss = (void *)link_cbss->priv; 10548 10549 if (!bss->wmm_used) { 10550 err = -EINVAL; 10551 goto err_free; 10552 } 10553 10554 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10555 err = -EINVAL; 10556 goto err_free; 10557 } 10558 10559 eth_random_addr(data->link[link_id].addr); 10560 data->link[link_id].conn = 10561 ieee80211_conn_settings_unlimited; 10562 sband = 10563 local->hw.wiphy->bands[link_cbss->channel->band]; 10564 10565 ieee80211_determine_our_sta_mode(sdata, sband, 10566 NULL, true, link_id, 10567 &data->link[link_id].conn); 10568 10569 data->link[link_id].bss = link_cbss; 10570 data->link[link_id].disabled = 10571 req->add_links[link_id].disabled; 10572 data->link[link_id].elems = 10573 (u8 *)req->add_links[link_id].elems; 10574 data->link[link_id].elems_len = 10575 req->add_links[link_id].elems_len; 10576 10577 if (!bss->uapsd_supported) 10578 uapsd_supported = false; 10579 10580 if (data->link[link_id].conn.mode < 10581 IEEE80211_CONN_MODE_EHT) { 10582 err = -EINVAL; 10583 goto err_free; 10584 } 10585 10586 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10587 link_id); 10588 if (err) { 10589 err = -EINVAL; 10590 goto err_free; 10591 } 10592 } 10593 10594 /* Require U-APSD support if we enabled it */ 10595 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10596 !uapsd_supported) { 10597 err = -EINVAL; 10598 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10599 goto err_free; 10600 } 10601 10602 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10603 link_id++) { 10604 if (!data->link[link_id].bss) 10605 continue; 10606 10607 /* only used to verify the mode, nothing is allocated */ 10608 err = ieee80211_prep_channel(sdata, NULL, link_id, 10609 data->link[link_id].bss, 10610 true, 10611 &data->link[link_id].conn, 10612 sdata->u.mgd.userspace_selectors); 10613 if (err) 10614 goto err_free; 10615 } 10616 } 10617 10618 /* link removal is done before the ML reconfiguration frame exchange so 10619 * that these links will not be used between their removal by the AP MLD 10620 * and before the station got the ML reconfiguration response. Based on 10621 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10622 * link removal request. 10623 */ 10624 if (req->rem_links) { 10625 u16 new_active_links = 10626 sdata->vif.active_links & ~req->rem_links; 10627 10628 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10629 10630 /* Should not be left with no valid links to perform the 10631 * ML reconfiguration 10632 */ 10633 if (!new_valid_links || 10634 !(new_valid_links & ~sdata->vif.dormant_links)) { 10635 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10636 err = -EINVAL; 10637 goto err_free; 10638 } 10639 10640 if (new_active_links != sdata->vif.active_links) { 10641 if (!new_active_links) 10642 new_active_links = 10643 BIT(__ffs(new_valid_links & 10644 ~sdata->vif.dormant_links)); 10645 10646 err = ieee80211_set_active_links(&sdata->vif, 10647 new_active_links); 10648 if (err) { 10649 sdata_info(sdata, 10650 "mlo: reconf: failed set active links\n"); 10651 goto err_free; 10652 } 10653 } 10654 } 10655 10656 /* Build the SKB before the link removal as the construction of the 10657 * station info for removed links requires the local address. 10658 * Invalidate the removed links, so that the transmission of the ML 10659 * reconfiguration request frame would not be done using them, as the AP 10660 * is expected to send the ML reconfiguration response frame on the link 10661 * on which the request was received. 10662 */ 10663 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10664 cpu_to_le16(req->ext_mld_capa_ops)); 10665 if (!skb) { 10666 err = -ENOMEM; 10667 goto err_free; 10668 } 10669 10670 if (req->rem_links) { 10671 u16 new_dormant_links = 10672 sdata->vif.dormant_links & ~req->rem_links; 10673 10674 err = ieee80211_vif_set_links(sdata, new_valid_links, 10675 new_dormant_links); 10676 if (err) { 10677 sdata_info(sdata, 10678 "mlo: reconf: failed set valid links\n"); 10679 kfree_skb(skb); 10680 goto err_free; 10681 } 10682 10683 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10684 link_id++) { 10685 if (!(req->rem_links & BIT(link_id))) 10686 continue; 10687 10688 ieee80211_sta_remove_link(sta, link_id); 10689 } 10690 10691 /* notify the driver and upper layers */ 10692 ieee80211_vif_cfg_change_notify(sdata, 10693 BSS_CHANGED_MLD_VALID_LINKS); 10694 cfg80211_links_removed(sdata->dev, req->rem_links); 10695 } 10696 10697 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10698 added_links, req->rem_links); 10699 10700 ieee80211_tx_skb(sdata, skb); 10701 10702 sdata->u.mgd.reconf.added_links = added_links; 10703 sdata->u.mgd.reconf.add_links_data = data; 10704 sdata->u.mgd.reconf.removed_links = req->rem_links; 10705 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10706 &sdata->u.mgd.reconf.wk, 10707 IEEE80211_ASSOC_TIMEOUT_SHORT); 10708 return 0; 10709 10710 err_free: 10711 kfree(data); 10712 return err; 10713 } 10714 10715 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10716 { 10717 unsigned long valid_links = sdata->vif.valid_links; 10718 u8 link_id; 10719 10720 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10721 10722 if (!ieee80211_vif_is_mld(&sdata->vif)) 10723 return false; 10724 10725 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10726 struct ieee80211_bss_conf *bss_conf = 10727 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10728 10729 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10730 return false; 10731 } 10732 10733 return true; 10734 } 10735 10736 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10737 { 10738 struct ieee80211_local *local = sdata->local; 10739 struct ieee80211_mgmt *mgmt; 10740 struct sk_buff *skb; 10741 int frame_len = offsetofend(struct ieee80211_mgmt, 10742 u.action.u.epcs) + (enable ? 1 : 0); 10743 10744 if (!ieee80211_mgd_epcs_supp(sdata)) 10745 return -EINVAL; 10746 10747 if (sdata->u.mgd.epcs.enabled == enable && 10748 !sdata->u.mgd.epcs.dialog_token) 10749 return 0; 10750 10751 /* Do not allow enabling EPCS if the AP didn't respond yet. 10752 * However, allow disabling EPCS in such a case. 10753 */ 10754 if (sdata->u.mgd.epcs.dialog_token && enable) 10755 return -EALREADY; 10756 10757 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10758 if (!skb) 10759 return -ENOBUFS; 10760 10761 skb_reserve(skb, local->hw.extra_tx_headroom); 10762 mgmt = skb_put_zero(skb, frame_len); 10763 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10764 IEEE80211_STYPE_ACTION); 10765 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10766 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10767 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10768 10769 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10770 if (enable) { 10771 u8 *pos = mgmt->u.action.u.epcs.variable; 10772 10773 mgmt->u.action.u.epcs.action_code = 10774 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10775 10776 *pos = ++sdata->u.mgd.dialog_token_alloc; 10777 sdata->u.mgd.epcs.dialog_token = *pos; 10778 } else { 10779 mgmt->u.action.u.epcs.action_code = 10780 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10781 10782 ieee80211_epcs_teardown(sdata); 10783 ieee80211_epcs_changed(sdata, false); 10784 } 10785 10786 ieee80211_tx_skb(sdata, skb); 10787 return 0; 10788 } 10789 10790 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10791 struct ieee802_11_elems *elems) 10792 { 10793 const struct element *sub; 10794 size_t scratch_len = elems->ml_epcs_len; 10795 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10796 10797 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10798 10799 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10800 return; 10801 10802 if (WARN_ON(!scratch)) 10803 return; 10804 10805 /* Directly parse the sub elements as the common information doesn't 10806 * hold any useful information. 10807 */ 10808 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10809 elems->ml_epcs_len) { 10810 struct ieee80211_link_data *link; 10811 struct ieee802_11_elems *link_elems __free(kfree); 10812 u8 *pos = (void *)sub->data; 10813 u16 control; 10814 ssize_t len; 10815 u8 link_id; 10816 10817 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10818 continue; 10819 10820 if (sub->datalen < sizeof(control)) 10821 break; 10822 10823 control = get_unaligned_le16(pos); 10824 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10825 10826 link = sdata_dereference(sdata->link[link_id], sdata); 10827 if (!link) 10828 continue; 10829 10830 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10831 elems->ml_epcs_len, 10832 scratch, scratch_len, 10833 IEEE80211_MLE_SUBELEM_FRAGMENT); 10834 if (len < (ssize_t)sizeof(control)) 10835 continue; 10836 10837 pos = scratch + sizeof(control); 10838 len -= sizeof(control); 10839 10840 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10841 if (!link_elems) 10842 continue; 10843 10844 if (ieee80211_sta_wmm_params(sdata->local, link, 10845 link_elems->wmm_param, 10846 link_elems->wmm_param_len, 10847 link_elems->mu_edca_param_set)) 10848 ieee80211_link_info_change_notify(sdata, link, 10849 BSS_CHANGED_QOS); 10850 } 10851 } 10852 10853 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10854 struct ieee80211_mgmt *mgmt, size_t len) 10855 { 10856 struct ieee802_11_elems *elems __free(kfree) = NULL; 10857 size_t ies_len; 10858 u16 status_code; 10859 u8 *pos, dialog_token; 10860 10861 if (!ieee80211_mgd_epcs_supp(sdata)) 10862 return; 10863 10864 /* Handle dialog token and status code */ 10865 pos = mgmt->u.action.u.epcs.variable; 10866 dialog_token = *pos; 10867 status_code = get_unaligned_le16(pos + 1); 10868 10869 /* An EPCS enable response with dialog token == 0 is an unsolicited 10870 * notification from the AP MLD. In such a case, EPCS should already be 10871 * enabled and status must be success 10872 */ 10873 if (!dialog_token && 10874 (!sdata->u.mgd.epcs.enabled || 10875 status_code != WLAN_STATUS_SUCCESS)) 10876 return; 10877 10878 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 10879 return; 10880 10881 sdata->u.mgd.epcs.dialog_token = 0; 10882 10883 if (status_code != WLAN_STATUS_SUCCESS) 10884 return; 10885 10886 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10887 ies_len = len - offsetof(struct ieee80211_mgmt, 10888 u.action.u.epcs.variable) - 10889 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10890 10891 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 10892 if (!elems) 10893 return; 10894 10895 ieee80211_ml_epcs(sdata, elems); 10896 ieee80211_epcs_changed(sdata, true); 10897 } 10898 10899 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 10900 struct ieee80211_mgmt *mgmt, size_t len) 10901 { 10902 if (!ieee80211_vif_is_mld(&sdata->vif) || 10903 !sdata->u.mgd.epcs.enabled) 10904 return; 10905 10906 ieee80211_epcs_teardown(sdata); 10907 ieee80211_epcs_changed(sdata, false); 10908 } 10909