1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2025 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 172 ignore_ht_channel_mismatch = false; 173 174 *chandef = (struct cfg80211_chan_def) { 175 .chan = channel, 176 .width = NL80211_CHAN_WIDTH_20_NOHT, 177 .center_freq1 = channel->center_freq, 178 .freq1_offset = channel->freq_offset, 179 }; 180 181 /* get special S1G case out of the way */ 182 if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 184 sdata_info(sdata, 185 "Missing S1G Operation Element? Trying operating == primary\n"); 186 chandef->width = ieee80211_s1g_channel_width(channel); 187 } 188 189 return IEEE80211_CONN_MODE_S1G; 190 } 191 192 /* get special 6 GHz case out of the way */ 193 if (sband->band == NL80211_BAND_6GHZ) { 194 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 195 196 /* this is an error */ 197 if (conn->mode < IEEE80211_CONN_MODE_HE) 198 return IEEE80211_CONN_MODE_LEGACY; 199 200 if (!elems->he_6ghz_capa || !elems->he_cap) { 201 sdata_info(sdata, 202 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 203 return IEEE80211_CONN_MODE_LEGACY; 204 } 205 206 if (!eht_oper || !elems->eht_cap) { 207 eht_oper = NULL; 208 mode = IEEE80211_CONN_MODE_HE; 209 } 210 211 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 212 eht_oper, chandef)) { 213 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 214 return IEEE80211_CONN_MODE_LEGACY; 215 } 216 217 return mode; 218 } 219 220 /* now we have the progression HT, VHT, ... */ 221 if (conn->mode < IEEE80211_CONN_MODE_HT) 222 return IEEE80211_CONN_MODE_LEGACY; 223 224 if (!ht_oper || !elems->ht_cap_elem) 225 return IEEE80211_CONN_MODE_LEGACY; 226 227 chandef->width = NL80211_CHAN_WIDTH_20; 228 229 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 230 channel->band); 231 /* check that channel matches the right operating channel */ 232 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 233 /* 234 * It's possible that some APs are confused here; 235 * Netgear WNDR3700 sometimes reports 4 higher than 236 * the actual channel in association responses, but 237 * since we look at probe response/beacon data here 238 * it should be OK. 239 */ 240 sdata_info(sdata, 241 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 242 channel->center_freq, ht_cfreq, 243 ht_oper->primary_chan, channel->band); 244 return IEEE80211_CONN_MODE_LEGACY; 245 } 246 247 ieee80211_chandef_ht_oper(ht_oper, chandef); 248 249 if (conn->mode < IEEE80211_CONN_MODE_VHT) 250 return IEEE80211_CONN_MODE_HT; 251 252 vht_chandef = *chandef; 253 254 /* 255 * having he_cap/he_oper parsed out implies we're at 256 * least operating as HE STA 257 */ 258 if (elems->he_cap && he_oper && 259 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 260 struct ieee80211_vht_operation he_oper_vht_cap; 261 262 /* 263 * Set only first 3 bytes (other 2 aren't used in 264 * ieee80211_chandef_vht_oper() anyway) 265 */ 266 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 267 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 268 269 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 270 &he_oper_vht_cap, ht_oper, 271 &vht_chandef)) { 272 sdata_info(sdata, 273 "HE AP VHT information is invalid, disabling HE\n"); 274 /* this will cause us to re-parse as VHT STA */ 275 return IEEE80211_CONN_MODE_VHT; 276 } 277 } else if (!vht_oper || !elems->vht_cap_elem) { 278 if (sband->band == NL80211_BAND_5GHZ) { 279 sdata_info(sdata, 280 "VHT information is missing, disabling VHT\n"); 281 return IEEE80211_CONN_MODE_HT; 282 } 283 no_vht = true; 284 } else if (sband->band == NL80211_BAND_2GHZ) { 285 no_vht = true; 286 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 287 vht_cap_info, 288 vht_oper, ht_oper, 289 &vht_chandef)) { 290 sdata_info(sdata, 291 "AP VHT information is invalid, disabling VHT\n"); 292 return IEEE80211_CONN_MODE_HT; 293 } 294 295 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 296 sdata_info(sdata, 297 "AP VHT information doesn't match HT, disabling VHT\n"); 298 return IEEE80211_CONN_MODE_HT; 299 } 300 301 *chandef = vht_chandef; 302 303 /* stick to current max mode if we or the AP don't have HE */ 304 if (conn->mode < IEEE80211_CONN_MODE_HE || 305 !elems->he_operation || !elems->he_cap) { 306 if (no_vht) 307 return IEEE80211_CONN_MODE_HT; 308 return IEEE80211_CONN_MODE_VHT; 309 } 310 311 /* stick to HE if we or the AP don't have EHT */ 312 if (conn->mode < IEEE80211_CONN_MODE_EHT || 313 !eht_oper || !elems->eht_cap) 314 return IEEE80211_CONN_MODE_HE; 315 316 /* 317 * handle the case that the EHT operation indicates that it holds EHT 318 * operation information (in case that the channel width differs from 319 * the channel width reported in HT/VHT/HE). 320 */ 321 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 322 struct cfg80211_chan_def eht_chandef = *chandef; 323 324 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 325 &eht_chandef); 326 327 eht_chandef.punctured = 328 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 329 330 if (!cfg80211_chandef_valid(&eht_chandef)) { 331 sdata_info(sdata, 332 "AP EHT information is invalid, disabling EHT\n"); 333 return IEEE80211_CONN_MODE_HE; 334 } 335 336 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 337 sdata_info(sdata, 338 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 339 return IEEE80211_CONN_MODE_HE; 340 } 341 342 *chandef = eht_chandef; 343 } 344 345 return IEEE80211_CONN_MODE_EHT; 346 } 347 348 static bool 349 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 350 struct ieee80211_supported_band *sband, 351 const struct ieee80211_ht_operation *ht_op) 352 { 353 struct ieee80211_sta_ht_cap sta_ht_cap; 354 int i; 355 356 if (sband->band == NL80211_BAND_6GHZ) 357 return true; 358 359 if (!ht_op) 360 return false; 361 362 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 363 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 364 365 /* 366 * P802.11REVme/D7.0 - 6.5.4.2.4 367 * ... 368 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 369 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 370 * in the HT Operation parameter that contains any unsupported MCSs, 371 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 372 * contain a ResultCode parameter that is not set to the value SUCCESS. 373 * ... 374 */ 375 376 /* Simply check that all basic rates are in the STA RX mask */ 377 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 378 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 379 ht_op->basic_set[i]) 380 return false; 381 } 382 383 return true; 384 } 385 386 static bool 387 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 388 int link_id, 389 struct ieee80211_supported_band *sband, 390 const struct ieee80211_vht_operation *vht_op) 391 { 392 struct ieee80211_sta_vht_cap sta_vht_cap; 393 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 394 int nss; 395 396 if (sband->band != NL80211_BAND_5GHZ) 397 return true; 398 399 if (!vht_op) 400 return false; 401 402 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 403 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 404 405 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 406 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 407 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 408 409 /* 410 * Many APs are incorrectly advertising an all-zero value here, 411 * which really means MCS 0-7 are required for 1-8 streams, but 412 * they don't really mean it that way. 413 * Some other APs are incorrectly advertising 3 spatial streams 414 * with MCS 0-7 are required, but don't really mean it that way 415 * and we'll connect only with HT, rather than even HE. 416 * As a result, unfortunately the VHT basic MCS/NSS set cannot 417 * be used at all, so check it only in strict mode. 418 */ 419 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 420 return true; 421 422 /* 423 * P802.11REVme/D7.0 - 6.5.4.2.4 424 * ... 425 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 426 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 427 * field in the VHT Operation parameter that contains any unsupported 428 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 429 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 430 * that is not set to the value SUCCESS. 431 * ... 432 */ 433 for (nss = 8; nss > 0; nss--) { 434 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 435 u8 sta_rx_val; 436 u8 sta_tx_val; 437 438 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 439 continue; 440 441 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 442 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 443 444 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 445 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 446 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 447 link_id_info(sdata, link_id, 448 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 449 nss, sta_rx_val, sta_tx_val, ap_op_val); 450 return false; 451 } 452 } 453 454 return true; 455 } 456 457 static bool 458 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 459 int link_id, 460 const struct ieee80211_he_cap_elem *he_cap, 461 const struct ieee80211_he_operation *he_op) 462 { 463 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 464 u16 mcs_80_map_tx, mcs_80_map_rx; 465 u16 ap_min_req_set; 466 int nss; 467 468 if (!he_cap) 469 return false; 470 471 /* mcs_nss is right after he_cap info */ 472 he_mcs_nss_supp = (void *)(he_cap + 1); 473 474 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 475 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 476 477 /* P802.11-REVme/D0.3 478 * 27.1.1 Introduction to the HE PHY 479 * ... 480 * An HE STA shall support the following features: 481 * ... 482 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 483 * supported channel widths for HE SU PPDUs 484 */ 485 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 486 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 487 link_id_info(sdata, link_id, 488 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 489 mcs_80_map_tx, mcs_80_map_rx); 490 return false; 491 } 492 493 if (!he_op) 494 return true; 495 496 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 497 498 /* 499 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 500 * zeroes, which is nonsense, and completely inconsistent with itself 501 * (it doesn't have 8 streams). Accept the settings in this case anyway. 502 */ 503 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 504 return true; 505 506 /* make sure the AP is consistent with itself 507 * 508 * P802.11-REVme/D0.3 509 * 26.17.1 Basic HE BSS operation 510 * 511 * A STA that is operating in an HE BSS shall be able to receive and 512 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 513 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 514 * MLME-START.request primitive and shall be able to receive at each of 515 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 516 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 517 * primitive 518 */ 519 for (nss = 8; nss > 0; nss--) { 520 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 521 u8 ap_rx_val; 522 u8 ap_tx_val; 523 524 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 525 continue; 526 527 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 528 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 529 530 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 531 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 532 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 533 link_id_info(sdata, link_id, 534 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 535 nss, ap_rx_val, ap_tx_val, ap_op_val); 536 return false; 537 } 538 } 539 540 return true; 541 } 542 543 static bool 544 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 545 struct ieee80211_supported_band *sband, 546 const struct ieee80211_he_operation *he_op) 547 { 548 const struct ieee80211_sta_he_cap *sta_he_cap = 549 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 550 u16 ap_min_req_set; 551 int i; 552 553 if (!sta_he_cap || !he_op) 554 return false; 555 556 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 557 558 /* 559 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 560 * zeroes, which is nonsense, and completely inconsistent with itself 561 * (it doesn't have 8 streams). Accept the settings in this case anyway. 562 */ 563 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 564 return true; 565 566 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 567 for (i = 0; i < 3; i++) { 568 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 569 &sta_he_cap->he_mcs_nss_supp; 570 u16 sta_mcs_map_rx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 572 u16 sta_mcs_map_tx = 573 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 574 u8 nss; 575 bool verified = true; 576 577 /* 578 * For each band there is a maximum of 8 spatial streams 579 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 580 * of 2 bits per NSS (1-8), with the values defined in enum 581 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 582 * capabilities aren't less than the AP's minimum requirements 583 * for this HE BSS per SS. 584 * It is enough to find one such band that meets the reqs. 585 */ 586 for (nss = 8; nss > 0; nss--) { 587 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 588 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 589 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 590 591 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 592 continue; 593 594 /* 595 * Make sure the HE AP doesn't require MCSs that aren't 596 * supported by the client as required by spec 597 * 598 * P802.11-REVme/D0.3 599 * 26.17.1 Basic HE BSS operation 600 * 601 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 602 * a BSS, unless it supports (i.e., is able to both transmit and 603 * receive using) all of the <HE-MCS, NSS> tuples in the basic 604 * HE-MCS and NSS set. 605 */ 606 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 607 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 608 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 609 verified = false; 610 break; 611 } 612 } 613 614 if (verified) 615 return true; 616 } 617 618 /* If here, STA doesn't meet AP's HE min requirements */ 619 return false; 620 } 621 622 static u8 623 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 624 const struct ieee80211_sta_eht_cap *sta_eht_cap, 625 unsigned int idx, int bw) 626 { 627 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 628 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 629 630 /* handle us being a 20 MHz-only EHT STA - with four values 631 * for MCS 0-7, 8-9, 10-11, 12-13. 632 */ 633 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 634 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 635 636 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 637 if (idx > 0) 638 idx--; 639 640 switch (bw) { 641 case 0: 642 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 643 case 1: 644 if (!(he_phy_cap0 & 645 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 646 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 647 return 0xff; /* pass check */ 648 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 649 case 2: 650 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 651 return 0xff; /* pass check */ 652 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 653 } 654 655 WARN_ON(1); 656 return 0; 657 } 658 659 static bool 660 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 661 struct ieee80211_supported_band *sband, 662 const struct ieee80211_eht_operation *eht_op) 663 { 664 const struct ieee80211_sta_he_cap *sta_he_cap = 665 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_sta_eht_cap *sta_eht_cap = 667 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 668 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 669 unsigned int i; 670 671 if (!sta_he_cap || !sta_eht_cap || !eht_op) 672 return false; 673 674 req = &eht_op->basic_mcs_nss; 675 676 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 677 u8 req_rx_nss, req_tx_nss; 678 unsigned int bw; 679 680 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_RX); 682 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 683 IEEE80211_EHT_MCS_NSS_TX); 684 685 for (bw = 0; bw < 3; bw++) { 686 u8 have, have_rx_nss, have_tx_nss; 687 688 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 689 sta_eht_cap, 690 i, bw); 691 have_rx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_RX); 693 have_tx_nss = u8_get_bits(have, 694 IEEE80211_EHT_MCS_NSS_TX); 695 696 if (req_rx_nss > have_rx_nss || 697 req_tx_nss > have_tx_nss) 698 return false; 699 } 700 } 701 702 return true; 703 } 704 705 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 706 const u8 *supp_rates, 707 unsigned int supp_rates_len, 708 const u8 *ext_supp_rates, 709 unsigned int ext_supp_rates_len, 710 u32 *rates, u32 *basic_rates, 711 unsigned long *unknown_rates_selectors, 712 bool *have_higher_than_11mbit, 713 int *min_rate, int *min_rate_index) 714 { 715 int i, j; 716 717 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 718 u8 supp_rate = i < supp_rates_len ? 719 supp_rates[i] : 720 ext_supp_rates[i - supp_rates_len]; 721 int rate = supp_rate & 0x7f; 722 bool is_basic = !!(supp_rate & 0x80); 723 724 if ((rate * 5) > 110 && have_higher_than_11mbit) 725 *have_higher_than_11mbit = true; 726 727 /* 728 * Skip membership selectors since they're not rates. 729 * 730 * Note: Even though the membership selector and the basic 731 * rate flag share the same bit, they are not exactly 732 * the same. 733 */ 734 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 735 if (unknown_rates_selectors) 736 set_bit(rate, unknown_rates_selectors); 737 continue; 738 } 739 740 for (j = 0; j < sband->n_bitrates; j++) { 741 struct ieee80211_rate *br; 742 int brate; 743 744 br = &sband->bitrates[j]; 745 746 brate = DIV_ROUND_UP(br->bitrate, 5); 747 if (brate == rate) { 748 if (rates) 749 *rates |= BIT(j); 750 if (is_basic && basic_rates) 751 *basic_rates |= BIT(j); 752 if (min_rate && (rate * 5) < *min_rate) { 753 *min_rate = rate * 5; 754 if (min_rate_index) 755 *min_rate_index = j; 756 } 757 break; 758 } 759 } 760 761 /* Handle an unknown entry as if it is an unknown selector */ 762 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 763 set_bit(rate, unknown_rates_selectors); 764 } 765 } 766 767 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 768 const struct cfg80211_chan_def *chandef, 769 u32 prohibited_flags) 770 { 771 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 772 chandef, prohibited_flags)) 773 return false; 774 775 if (chandef->punctured && 776 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 777 return false; 778 779 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 780 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 781 return false; 782 783 return true; 784 } 785 786 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 787 { 788 if (c->width == NL80211_CHAN_WIDTH_80P80) 789 return 4 + 4; 790 791 return nl80211_chan_width_to_mhz(c->width) / 20; 792 } 793 794 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 795 { 796 switch (c->width) { 797 case NL80211_CHAN_WIDTH_20: 798 case NL80211_CHAN_WIDTH_20_NOHT: 799 return 1; 800 case NL80211_CHAN_WIDTH_40: 801 return 2; 802 case NL80211_CHAN_WIDTH_80P80: 803 case NL80211_CHAN_WIDTH_80: 804 return 3; 805 case NL80211_CHAN_WIDTH_160: 806 return 4; 807 case NL80211_CHAN_WIDTH_320: 808 return 5; 809 default: 810 WARN_ON(1); 811 return 0; 812 } 813 } 814 815 VISIBLE_IF_MAC80211_KUNIT int 816 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 817 u8 n_partial_subchans) 818 { 819 int n = ieee80211_chandef_num_subchans(ap); 820 struct cfg80211_chan_def tmp = *ap; 821 int offset = 0; 822 823 /* 824 * Given a chandef (in this context, it's the AP's) and a number 825 * of subchannels that we want to look at ('n_partial_subchans'), 826 * calculate the offset in number of subchannels between the full 827 * and the subset with the desired width. 828 */ 829 830 /* same number of subchannels means no offset, obviously */ 831 if (n == n_partial_subchans) 832 return 0; 833 834 /* don't WARN - misconfigured APs could cause this if their N > width */ 835 if (n < n_partial_subchans) 836 return 0; 837 838 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 839 u32 prev = tmp.center_freq1; 840 841 ieee80211_chandef_downgrade(&tmp, NULL); 842 843 /* 844 * if center_freq moved up, half the original channels 845 * are gone now but were below, so increase offset 846 */ 847 if (prev < tmp.center_freq1) 848 offset += ieee80211_chandef_num_subchans(&tmp); 849 } 850 851 /* 852 * 80+80 with secondary 80 below primary - four subchannels for it 853 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 854 */ 855 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 856 ap->center_freq2 < ap->center_freq1) 857 offset += 4; 858 859 return offset; 860 } 861 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 862 863 VISIBLE_IF_MAC80211_KUNIT void 864 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 865 const struct cfg80211_chan_def *ap, 866 const struct cfg80211_chan_def *used) 867 { 868 u8 needed = ieee80211_chandef_num_subchans(used); 869 u8 have = ieee80211_chandef_num_subchans(ap); 870 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 871 u8 offset; 872 873 if (!psd->valid) 874 return; 875 876 /* if N is zero, all defaults were used, no point in rearranging */ 877 if (!psd->n) 878 goto out; 879 880 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 881 882 /* 883 * This assumes that 'N' is consistent with the HE channel, as 884 * it should be (otherwise the AP is broken). 885 * 886 * In psd->power we have values in the order 0..N, 0..K, where 887 * N+K should cover the entire channel per 'ap', but even if it 888 * doesn't then we've pre-filled 'unlimited' as defaults. 889 * 890 * But this is all the wrong order, we want to have them in the 891 * order of the 'used' channel. 892 * 893 * So for example, we could have a 320 MHz EHT AP, which has the 894 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 895 * seem to be considered for the TPE), as follows: 896 * 897 * EHT 320: | | | | | | | | | | | | | | | | | 898 * HE 80: | | | | | 899 * used 160: | | | | | | | | | 900 * 901 * N entries: |--|--|--|--| 902 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 903 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 904 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 905 * used chan: 0 1 2 3 4 5 6 7 906 * 907 * The idx in the power array ('power idx') is like this since it 908 * comes directly from the element's N and K entries in their 909 * element order, and those are this way for HE compatibility. 910 * 911 * Rearrange them as desired here, first by putting them into the 912 * 'full chan' order, and then selecting the necessary subset for 913 * the 'used chan'. 914 */ 915 916 /* first reorder according to AP channel */ 917 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 918 for (int i = 0; i < have; i++) { 919 if (i < offset) 920 tmp[i] = psd->power[i + psd->n]; 921 else if (i < offset + psd->n) 922 tmp[i] = psd->power[i - offset]; 923 else 924 tmp[i] = psd->power[i]; 925 } 926 927 /* 928 * and then select the subset for the used channel 929 * (set everything to defaults first in case a driver is confused) 930 */ 931 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 932 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 933 for (int i = 0; i < needed; i++) 934 psd->power[i] = tmp[offset + i]; 935 936 out: 937 /* limit, but don't lie if there are defaults in the data */ 938 if (needed < psd->count) 939 psd->count = needed; 940 } 941 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 942 943 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 944 const struct cfg80211_chan_def *ap, 945 const struct cfg80211_chan_def *used) 946 { 947 /* ignore this completely for narrow/invalid channels */ 948 if (!ieee80211_chandef_num_subchans(ap) || 949 !ieee80211_chandef_num_subchans(used)) { 950 ieee80211_clear_tpe(tpe); 951 return; 952 } 953 954 for (int i = 0; i < 2; i++) { 955 int needed_pwr_count; 956 957 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 958 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 959 960 /* limit this to the widths we actually need */ 961 needed_pwr_count = ieee80211_chandef_num_widths(used); 962 if (needed_pwr_count < tpe->max_local[i].count) 963 tpe->max_local[i].count = needed_pwr_count; 964 if (needed_pwr_count < tpe->max_reg_client[i].count) 965 tpe->max_reg_client[i].count = needed_pwr_count; 966 } 967 } 968 969 /* 970 * The AP part of the channel request is used to distinguish settings 971 * to the device used for wider bandwidth OFDMA. This is used in the 972 * channel context code to assign two channel contexts even if they're 973 * both for the same channel, if the AP bandwidths are incompatible. 974 * If not EHT (or driver override) then ap.chan == NULL indicates that 975 * there's no wider BW OFDMA used. 976 */ 977 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 978 struct ieee80211_chan_req *chanreq, 979 struct ieee80211_conn_settings *conn, 980 struct cfg80211_chan_def *ap_chandef) 981 { 982 chanreq->ap.chan = NULL; 983 984 if (conn->mode < IEEE80211_CONN_MODE_EHT) 985 return; 986 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 987 return; 988 989 chanreq->ap = *ap_chandef; 990 } 991 992 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 993 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 994 struct ieee80211_conn_settings *conn, 995 struct cfg80211_bss *cbss, int link_id, 996 struct ieee80211_chan_req *chanreq, 997 struct cfg80211_chan_def *ap_chandef, 998 unsigned long *userspace_selectors) 999 { 1000 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1001 struct ieee80211_bss *bss = (void *)cbss->priv; 1002 struct ieee80211_channel *channel = cbss->channel; 1003 struct ieee80211_elems_parse_params parse_params = { 1004 .link_id = -1, 1005 .from_ap = true, 1006 .start = ies->data, 1007 .len = ies->len, 1008 }; 1009 struct ieee802_11_elems *elems; 1010 struct ieee80211_supported_band *sband; 1011 enum ieee80211_conn_mode ap_mode; 1012 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1013 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1014 int ret; 1015 1016 again: 1017 parse_params.mode = conn->mode; 1018 elems = ieee802_11_parse_elems_full(&parse_params); 1019 if (!elems) 1020 return ERR_PTR(-ENOMEM); 1021 1022 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1023 elems, false, conn, ap_chandef); 1024 1025 /* this should be impossible since parsing depends on our mode */ 1026 if (WARN_ON(ap_mode > conn->mode)) { 1027 ret = -EINVAL; 1028 goto free; 1029 } 1030 1031 if (conn->mode != ap_mode) { 1032 conn->mode = ap_mode; 1033 kfree(elems); 1034 goto again; 1035 } 1036 1037 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1038 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1039 1040 sband = sdata->local->hw.wiphy->bands[channel->band]; 1041 1042 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1043 elems->ext_supp_rates, elems->ext_supp_rates_len, 1044 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1045 NULL); 1046 1047 switch (channel->band) { 1048 case NL80211_BAND_S1GHZ: 1049 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1050 ret = -EINVAL; 1051 goto free; 1052 } 1053 return elems; 1054 case NL80211_BAND_6GHZ: 1055 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1056 link_id_info(sdata, link_id, 1057 "Rejecting non-HE 6/7 GHz connection"); 1058 ret = -EINVAL; 1059 goto free; 1060 } 1061 break; 1062 default: 1063 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1064 ret = -EINVAL; 1065 goto free; 1066 } 1067 } 1068 1069 switch (ap_mode) { 1070 case IEEE80211_CONN_MODE_S1G: 1071 WARN_ON(1); 1072 ret = -EINVAL; 1073 goto free; 1074 case IEEE80211_CONN_MODE_LEGACY: 1075 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1076 break; 1077 case IEEE80211_CONN_MODE_HT: 1078 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1079 conn->bw_limit, 1080 IEEE80211_CONN_BW_LIMIT_40); 1081 break; 1082 case IEEE80211_CONN_MODE_VHT: 1083 case IEEE80211_CONN_MODE_HE: 1084 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1085 conn->bw_limit, 1086 IEEE80211_CONN_BW_LIMIT_160); 1087 break; 1088 case IEEE80211_CONN_MODE_EHT: 1089 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1090 conn->bw_limit, 1091 IEEE80211_CONN_BW_LIMIT_320); 1092 break; 1093 } 1094 1095 chanreq->oper = *ap_chandef; 1096 1097 bitmap_copy(sta_selectors, userspace_selectors, 128); 1098 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1099 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1100 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1101 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1102 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1103 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1104 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1105 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1106 1107 /* 1108 * We do not support EPD or GLK so never add them. 1109 * SAE_H2E is handled through userspace_selectors. 1110 */ 1111 1112 /* Check if we support all required features */ 1113 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1114 link_id_info(sdata, link_id, 1115 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1116 ret = -EINVAL; 1117 goto free; 1118 } 1119 1120 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1121 1122 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1123 IEEE80211_CHAN_DISABLED)) { 1124 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1125 ret = -EINVAL; 1126 goto free; 1127 } 1128 1129 ieee80211_chanreq_downgrade(chanreq, conn); 1130 } 1131 1132 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1133 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1134 IEEE80211_CHAN_NO_HE)) { 1135 conn->mode = IEEE80211_CONN_MODE_VHT; 1136 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1137 conn->bw_limit, 1138 IEEE80211_CONN_BW_LIMIT_160); 1139 } 1140 1141 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1142 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1143 IEEE80211_CHAN_NO_EHT)) { 1144 conn->mode = IEEE80211_CONN_MODE_HE; 1145 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1146 conn->bw_limit, 1147 IEEE80211_CONN_BW_LIMIT_160); 1148 } 1149 1150 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1151 link_id_info(sdata, link_id, 1152 "regulatory prevented using AP config, downgraded\n"); 1153 1154 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1155 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1156 elems->ht_operation)) { 1157 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1158 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1159 link_id_info(sdata, link_id, 1160 "required MCSes not supported, disabling HT\n"); 1161 } 1162 1163 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1164 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1165 elems->vht_operation)) { 1166 conn->mode = IEEE80211_CONN_MODE_HT; 1167 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1168 conn->bw_limit, 1169 IEEE80211_CONN_BW_LIMIT_40); 1170 link_id_info(sdata, link_id, 1171 "required MCSes not supported, disabling VHT\n"); 1172 } 1173 1174 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1175 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1176 (void *)elems->he_cap, 1177 elems->he_operation) || 1178 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1179 elems->he_operation))) { 1180 conn->mode = IEEE80211_CONN_MODE_VHT; 1181 link_id_info(sdata, link_id, 1182 "required MCSes not supported, disabling HE\n"); 1183 } 1184 1185 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1186 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1187 elems->eht_operation)) { 1188 conn->mode = IEEE80211_CONN_MODE_HE; 1189 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1190 conn->bw_limit, 1191 IEEE80211_CONN_BW_LIMIT_160); 1192 link_id_info(sdata, link_id, 1193 "required MCSes not supported, disabling EHT\n"); 1194 } 1195 1196 /* the mode can only decrease, so this must terminate */ 1197 if (ap_mode != conn->mode) { 1198 kfree(elems); 1199 goto again; 1200 } 1201 1202 mlme_link_id_dbg(sdata, link_id, 1203 "connecting with %s mode, max bandwidth %d MHz\n", 1204 ieee80211_conn_mode_str(conn->mode), 1205 20 * (1 << conn->bw_limit)); 1206 1207 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1208 ret = -EINVAL; 1209 goto free; 1210 } 1211 1212 return elems; 1213 free: 1214 kfree(elems); 1215 return ERR_PTR(ret); 1216 } 1217 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1218 1219 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1220 struct ieee802_11_elems *elems, 1221 bool update, u64 *changed, 1222 const char *frame) 1223 { 1224 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1225 struct ieee80211_sub_if_data *sdata = link->sdata; 1226 struct ieee80211_chan_req chanreq = {}; 1227 struct cfg80211_chan_def ap_chandef; 1228 enum ieee80211_conn_mode ap_mode; 1229 u32 vht_cap_info = 0; 1230 u16 ht_opmode; 1231 int ret; 1232 1233 /* don't track any bandwidth changes in legacy/S1G modes */ 1234 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1235 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1236 return 0; 1237 1238 if (elems->vht_cap_elem) 1239 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1240 1241 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1242 elems, true, &link->u.mgd.conn, 1243 &ap_chandef); 1244 1245 if (ap_mode != link->u.mgd.conn.mode) { 1246 link_info(link, 1247 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1248 link->u.mgd.bssid, 1249 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1250 ieee80211_conn_mode_str(ap_mode), frame); 1251 return -EINVAL; 1252 } 1253 1254 chanreq.oper = ap_chandef; 1255 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1256 &ap_chandef); 1257 1258 /* 1259 * if HT operation mode changed store the new one - 1260 * this may be applicable even if channel is identical 1261 */ 1262 if (elems->ht_operation) { 1263 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1264 if (link->conf->ht_operation_mode != ht_opmode) { 1265 *changed |= BSS_CHANGED_HT; 1266 link->conf->ht_operation_mode = ht_opmode; 1267 } 1268 } 1269 1270 /* 1271 * Downgrade the new channel if we associated with restricted 1272 * bandwidth capabilities. For example, if we associated as a 1273 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1274 * or config reasons) then switching to a 40 MHz channel now 1275 * won't do us any good -- we couldn't use it with the AP. 1276 */ 1277 while (link->u.mgd.conn.bw_limit < 1278 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1279 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1280 1281 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1282 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1283 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1284 &chanreq.oper); 1285 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1286 link->conf->tpe = elems->tpe; 1287 *changed |= BSS_CHANGED_TPE; 1288 } 1289 } 1290 1291 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1292 return 0; 1293 1294 link_info(link, 1295 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1296 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1297 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1298 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1299 chanreq.oper.center_freq2); 1300 1301 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1302 sdata_info(sdata, 1303 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1304 link->u.mgd.bssid, frame); 1305 return -EINVAL; 1306 } 1307 1308 if (!update) { 1309 link->conf->chanreq = chanreq; 1310 return 0; 1311 } 1312 1313 /* 1314 * We're tracking the current AP here, so don't do any further checks 1315 * here. This keeps us from playing ping-pong with regulatory, without 1316 * it the following can happen (for example): 1317 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1318 * - AP advertises regdom US 1319 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1320 * - we detect an unsupported channel and disconnect 1321 * - disconnect causes CRDA to reload world regdomain and the game 1322 * starts anew. 1323 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1324 * 1325 * It seems possible that there are still scenarios with CSA or real 1326 * bandwidth changes where a this could happen, but those cases are 1327 * less common and wouldn't completely prevent using the AP. 1328 */ 1329 1330 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1331 if (ret) { 1332 sdata_info(sdata, 1333 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1334 link->u.mgd.bssid, frame); 1335 return ret; 1336 } 1337 1338 cfg80211_schedule_channels_check(&sdata->wdev); 1339 return 0; 1340 } 1341 1342 /* frame sending functions */ 1343 1344 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1345 struct sk_buff *skb, u8 ap_ht_param, 1346 struct ieee80211_supported_band *sband, 1347 struct ieee80211_channel *channel, 1348 enum ieee80211_smps_mode smps, 1349 const struct ieee80211_conn_settings *conn) 1350 { 1351 u8 *pos; 1352 u32 flags = channel->flags; 1353 u16 cap; 1354 struct ieee80211_sta_ht_cap ht_cap; 1355 1356 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1357 1358 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1359 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1360 1361 /* determine capability flags */ 1362 cap = ht_cap.cap; 1363 1364 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1365 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1366 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1367 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1368 cap &= ~IEEE80211_HT_CAP_SGI_40; 1369 } 1370 break; 1371 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1372 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1373 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1374 cap &= ~IEEE80211_HT_CAP_SGI_40; 1375 } 1376 break; 1377 } 1378 1379 /* 1380 * If 40 MHz was disabled associate as though we weren't 1381 * capable of 40 MHz -- some broken APs will never fall 1382 * back to trying to transmit in 20 MHz. 1383 */ 1384 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1385 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1386 cap &= ~IEEE80211_HT_CAP_SGI_40; 1387 } 1388 1389 /* set SM PS mode properly */ 1390 cap &= ~IEEE80211_HT_CAP_SM_PS; 1391 switch (smps) { 1392 case IEEE80211_SMPS_AUTOMATIC: 1393 case IEEE80211_SMPS_NUM_MODES: 1394 WARN_ON(1); 1395 fallthrough; 1396 case IEEE80211_SMPS_OFF: 1397 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1398 IEEE80211_HT_CAP_SM_PS_SHIFT; 1399 break; 1400 case IEEE80211_SMPS_STATIC: 1401 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1402 IEEE80211_HT_CAP_SM_PS_SHIFT; 1403 break; 1404 case IEEE80211_SMPS_DYNAMIC: 1405 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1406 IEEE80211_HT_CAP_SM_PS_SHIFT; 1407 break; 1408 } 1409 1410 /* reserve and fill IE */ 1411 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1412 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1413 } 1414 1415 /* This function determines vht capability flags for the association 1416 * and builds the IE. 1417 * Note - the function returns true to own the MU-MIMO capability 1418 */ 1419 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1420 struct sk_buff *skb, 1421 struct ieee80211_supported_band *sband, 1422 struct ieee80211_vht_cap *ap_vht_cap, 1423 const struct ieee80211_conn_settings *conn) 1424 { 1425 struct ieee80211_local *local = sdata->local; 1426 u8 *pos; 1427 u32 cap; 1428 struct ieee80211_sta_vht_cap vht_cap; 1429 u32 mask, ap_bf_sts, our_bf_sts; 1430 bool mu_mimo_owner = false; 1431 1432 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1433 1434 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1435 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1436 1437 /* determine capability flags */ 1438 cap = vht_cap.cap; 1439 1440 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1441 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1442 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1443 } 1444 1445 /* 1446 * Some APs apparently get confused if our capabilities are better 1447 * than theirs, so restrict what we advertise in the assoc request. 1448 */ 1449 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1450 if (!(ap_vht_cap->vht_cap_info & 1451 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1452 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1453 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1454 else if (!(ap_vht_cap->vht_cap_info & 1455 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1456 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1457 } 1458 1459 /* 1460 * If some other vif is using the MU-MIMO capability we cannot associate 1461 * using MU-MIMO - this will lead to contradictions in the group-id 1462 * mechanism. 1463 * Ownership is defined since association request, in order to avoid 1464 * simultaneous associations with MU-MIMO. 1465 */ 1466 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1467 bool disable_mu_mimo = false; 1468 struct ieee80211_sub_if_data *other; 1469 1470 list_for_each_entry(other, &local->interfaces, list) { 1471 if (other->vif.bss_conf.mu_mimo_owner) { 1472 disable_mu_mimo = true; 1473 break; 1474 } 1475 } 1476 if (disable_mu_mimo) 1477 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1478 else 1479 mu_mimo_owner = true; 1480 } 1481 1482 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1483 1484 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1485 our_bf_sts = cap & mask; 1486 1487 if (ap_bf_sts < our_bf_sts) { 1488 cap &= ~mask; 1489 cap |= ap_bf_sts; 1490 } 1491 1492 /* reserve and fill IE */ 1493 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1494 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1495 1496 return mu_mimo_owner; 1497 } 1498 1499 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1500 struct sk_buff *skb, 1501 enum nl80211_chan_width width, 1502 struct ieee80211_supported_band *sband, 1503 struct ieee80211_mgd_assoc_data *assoc_data) 1504 { 1505 u32 rates; 1506 1507 if (assoc_data->supp_rates_len && 1508 !ieee80211_hw_check(&local->hw, STRICT)) { 1509 /* 1510 * Get all rates supported by the device and the AP as 1511 * some APs don't like getting a superset of their rates 1512 * in the association request (e.g. D-Link DAP 1353 in 1513 * b-only mode)... 1514 */ 1515 ieee80211_parse_bitrates(width, sband, 1516 assoc_data->supp_rates, 1517 assoc_data->supp_rates_len, 1518 &rates); 1519 } else { 1520 /* 1521 * In case AP not provide any supported rates information 1522 * before association, we send information element(s) with 1523 * all rates that we support. 1524 */ 1525 rates = ~0; 1526 } 1527 1528 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1529 WLAN_EID_SUPP_RATES); 1530 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1531 WLAN_EID_EXT_SUPP_RATES); 1532 } 1533 1534 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1535 const u8 *elems, 1536 size_t elems_len, 1537 size_t offset) 1538 { 1539 size_t noffset; 1540 1541 static const u8 before_ht[] = { 1542 WLAN_EID_SSID, 1543 WLAN_EID_SUPP_RATES, 1544 WLAN_EID_EXT_SUPP_RATES, 1545 WLAN_EID_PWR_CAPABILITY, 1546 WLAN_EID_SUPPORTED_CHANNELS, 1547 WLAN_EID_RSN, 1548 WLAN_EID_QOS_CAPA, 1549 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1550 WLAN_EID_MOBILITY_DOMAIN, 1551 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1552 WLAN_EID_RIC_DATA, /* reassoc only */ 1553 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1554 }; 1555 static const u8 after_ric[] = { 1556 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1557 WLAN_EID_HT_CAPABILITY, 1558 WLAN_EID_BSS_COEX_2040, 1559 /* luckily this is almost always there */ 1560 WLAN_EID_EXT_CAPABILITY, 1561 WLAN_EID_QOS_TRAFFIC_CAPA, 1562 WLAN_EID_TIM_BCAST_REQ, 1563 WLAN_EID_INTERWORKING, 1564 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1565 WLAN_EID_VHT_CAPABILITY, 1566 WLAN_EID_OPMODE_NOTIF, 1567 }; 1568 1569 if (!elems_len) 1570 return offset; 1571 1572 noffset = ieee80211_ie_split_ric(elems, elems_len, 1573 before_ht, 1574 ARRAY_SIZE(before_ht), 1575 after_ric, 1576 ARRAY_SIZE(after_ric), 1577 offset); 1578 skb_put_data(skb, elems + offset, noffset - offset); 1579 1580 return noffset; 1581 } 1582 1583 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1584 const u8 *elems, 1585 size_t elems_len, 1586 size_t offset) 1587 { 1588 static const u8 before_vht[] = { 1589 /* 1590 * no need to list the ones split off before HT 1591 * or generated here 1592 */ 1593 WLAN_EID_BSS_COEX_2040, 1594 WLAN_EID_EXT_CAPABILITY, 1595 WLAN_EID_QOS_TRAFFIC_CAPA, 1596 WLAN_EID_TIM_BCAST_REQ, 1597 WLAN_EID_INTERWORKING, 1598 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1599 }; 1600 size_t noffset; 1601 1602 if (!elems_len) 1603 return offset; 1604 1605 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1606 noffset = ieee80211_ie_split(elems, elems_len, 1607 before_vht, ARRAY_SIZE(before_vht), 1608 offset); 1609 skb_put_data(skb, elems + offset, noffset - offset); 1610 1611 return noffset; 1612 } 1613 1614 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1615 const u8 *elems, 1616 size_t elems_len, 1617 size_t offset) 1618 { 1619 static const u8 before_he[] = { 1620 /* 1621 * no need to list the ones split off before VHT 1622 * or generated here 1623 */ 1624 WLAN_EID_OPMODE_NOTIF, 1625 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1626 /* 11ai elements */ 1627 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1628 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1629 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1630 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1631 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1632 /* TODO: add 11ah/11aj/11ak elements */ 1633 }; 1634 size_t noffset; 1635 1636 if (!elems_len) 1637 return offset; 1638 1639 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1640 noffset = ieee80211_ie_split(elems, elems_len, 1641 before_he, ARRAY_SIZE(before_he), 1642 offset); 1643 skb_put_data(skb, elems + offset, noffset - offset); 1644 1645 return noffset; 1646 } 1647 1648 #define PRESENT_ELEMS_MAX 8 1649 #define PRESENT_ELEM_EXT_OFFS 0x100 1650 1651 static void 1652 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1653 struct sk_buff *skb, u16 capab, 1654 const struct element *ext_capa, 1655 const u16 *present_elems, 1656 struct ieee80211_mgd_assoc_data *assoc_data); 1657 1658 static size_t 1659 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1660 struct sk_buff *skb, u16 *capab, 1661 const struct element *ext_capa, 1662 const u8 *extra_elems, 1663 size_t extra_elems_len, 1664 unsigned int link_id, 1665 struct ieee80211_link_data *link, 1666 u16 *present_elems, 1667 struct ieee80211_mgd_assoc_data *assoc_data) 1668 { 1669 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1670 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1671 struct ieee80211_channel *chan = cbss->channel; 1672 const struct ieee80211_sband_iftype_data *iftd; 1673 struct ieee80211_local *local = sdata->local; 1674 struct ieee80211_supported_band *sband; 1675 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1676 struct ieee80211_chanctx_conf *chanctx_conf; 1677 enum ieee80211_smps_mode smps_mode; 1678 u16 orig_capab = *capab; 1679 size_t offset = 0; 1680 int present_elems_len = 0; 1681 u8 *pos; 1682 int i; 1683 1684 #define ADD_PRESENT_ELEM(id) do { \ 1685 /* need a last for termination - we use 0 == SSID */ \ 1686 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1687 present_elems[present_elems_len++] = (id); \ 1688 } while (0) 1689 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1690 1691 if (link) 1692 smps_mode = link->smps_mode; 1693 else if (sdata->u.mgd.powersave) 1694 smps_mode = IEEE80211_SMPS_DYNAMIC; 1695 else 1696 smps_mode = IEEE80211_SMPS_OFF; 1697 1698 if (link) { 1699 /* 1700 * 5/10 MHz scenarios are only viable without MLO, in which 1701 * case this pointer should be used ... All of this is a bit 1702 * unclear though, not sure this even works at all. 1703 */ 1704 rcu_read_lock(); 1705 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1706 if (chanctx_conf) 1707 width = chanctx_conf->def.width; 1708 rcu_read_unlock(); 1709 } 1710 1711 sband = local->hw.wiphy->bands[chan->band]; 1712 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1713 1714 if (sband->band == NL80211_BAND_2GHZ) { 1715 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1716 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1717 } 1718 1719 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1720 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1721 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1722 1723 if (sband->band != NL80211_BAND_S1GHZ) 1724 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1725 1726 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1727 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1728 struct cfg80211_chan_def chandef = { 1729 .width = width, 1730 .chan = chan, 1731 }; 1732 1733 pos = skb_put(skb, 4); 1734 *pos++ = WLAN_EID_PWR_CAPABILITY; 1735 *pos++ = 2; 1736 *pos++ = 0; /* min tx power */ 1737 /* max tx power */ 1738 *pos++ = ieee80211_chandef_max_power(&chandef); 1739 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1740 } 1741 1742 /* 1743 * Per spec, we shouldn't include the list of channels if we advertise 1744 * support for extended channel switching, but we've always done that; 1745 * (for now?) apply this restriction only on the (new) 6 GHz band. 1746 */ 1747 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1748 (sband->band != NL80211_BAND_6GHZ || 1749 !ext_capa || ext_capa->datalen < 1 || 1750 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1751 /* TODO: get this in reg domain format */ 1752 pos = skb_put(skb, 2 * sband->n_channels + 2); 1753 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1754 *pos++ = 2 * sband->n_channels; 1755 for (i = 0; i < sband->n_channels; i++) { 1756 int cf = sband->channels[i].center_freq; 1757 1758 *pos++ = ieee80211_frequency_to_channel(cf); 1759 *pos++ = 1; /* one channel in the subband*/ 1760 } 1761 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1762 } 1763 1764 /* if present, add any custom IEs that go before HT */ 1765 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1766 extra_elems_len, 1767 offset); 1768 1769 if (sband->band != NL80211_BAND_6GHZ && 1770 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1771 ieee80211_add_ht_ie(sdata, skb, 1772 assoc_data->link[link_id].ap_ht_param, 1773 sband, chan, smps_mode, 1774 &assoc_data->link[link_id].conn); 1775 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1776 } 1777 1778 /* if present, add any custom IEs that go before VHT */ 1779 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1780 extra_elems_len, 1781 offset); 1782 1783 if (sband->band != NL80211_BAND_6GHZ && 1784 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1785 sband->vht_cap.vht_supported) { 1786 bool mu_mimo_owner = 1787 ieee80211_add_vht_ie(sdata, skb, sband, 1788 &assoc_data->link[link_id].ap_vht_cap, 1789 &assoc_data->link[link_id].conn); 1790 1791 if (link) 1792 link->conf->mu_mimo_owner = mu_mimo_owner; 1793 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1794 } 1795 1796 /* if present, add any custom IEs that go before HE */ 1797 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1798 extra_elems_len, 1799 offset); 1800 1801 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1802 ieee80211_put_he_cap(skb, sdata, sband, 1803 &assoc_data->link[link_id].conn); 1804 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1805 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1806 } 1807 1808 /* 1809 * careful - need to know about all the present elems before 1810 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1811 * we're going to put it after the ML element 1812 */ 1813 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1814 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1815 1816 if (link_id == assoc_data->assoc_link_id) 1817 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1818 present_elems, assoc_data); 1819 1820 /* crash if somebody gets it wrong */ 1821 present_elems = NULL; 1822 1823 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1824 ieee80211_put_eht_cap(skb, sdata, sband, 1825 &assoc_data->link[link_id].conn); 1826 1827 if (sband->band == NL80211_BAND_S1GHZ) { 1828 ieee80211_add_aid_request_ie(sdata, skb); 1829 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1830 } 1831 1832 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1833 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1834 1835 return offset; 1836 } 1837 1838 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1839 const u16 *outer, 1840 const u16 *inner) 1841 { 1842 unsigned int skb_len = skb->len; 1843 bool at_extension = false; 1844 bool added = false; 1845 int i, j; 1846 u8 *len, *list_len = NULL; 1847 1848 skb_put_u8(skb, WLAN_EID_EXTENSION); 1849 len = skb_put(skb, 1); 1850 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1851 1852 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1853 u16 elem = outer[i]; 1854 bool have_inner = false; 1855 1856 /* should at least be sorted in the sense of normal -> ext */ 1857 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1858 1859 /* switch to extension list */ 1860 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1861 at_extension = true; 1862 if (!list_len) 1863 skb_put_u8(skb, 0); 1864 list_len = NULL; 1865 } 1866 1867 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1868 if (elem == inner[j]) { 1869 have_inner = true; 1870 break; 1871 } 1872 } 1873 1874 if (have_inner) 1875 continue; 1876 1877 if (!list_len) { 1878 list_len = skb_put(skb, 1); 1879 *list_len = 0; 1880 } 1881 *list_len += 1; 1882 skb_put_u8(skb, (u8)elem); 1883 added = true; 1884 } 1885 1886 /* if we added a list but no extension list, make a zero-len one */ 1887 if (added && (!at_extension || !list_len)) 1888 skb_put_u8(skb, 0); 1889 1890 /* if nothing added remove extension element completely */ 1891 if (!added) 1892 skb_trim(skb, skb_len); 1893 else 1894 *len = skb->len - skb_len - 2; 1895 } 1896 1897 static void 1898 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1899 struct sk_buff *skb, u16 capab, 1900 const struct element *ext_capa, 1901 const u16 *outer_present_elems, 1902 struct ieee80211_mgd_assoc_data *assoc_data) 1903 { 1904 struct ieee80211_local *local = sdata->local; 1905 struct ieee80211_multi_link_elem *ml_elem; 1906 struct ieee80211_mle_basic_common_info *common; 1907 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1908 __le16 eml_capa = 0, mld_capa_ops = 0; 1909 unsigned int link_id; 1910 u8 *ml_elem_len; 1911 void *capab_pos; 1912 1913 if (!ieee80211_vif_is_mld(&sdata->vif)) 1914 return; 1915 1916 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1917 ieee80211_vif_type_p2p(&sdata->vif)); 1918 if (ift_ext_capa) { 1919 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1920 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1921 } 1922 1923 skb_put_u8(skb, WLAN_EID_EXTENSION); 1924 ml_elem_len = skb_put(skb, 1); 1925 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1926 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1927 ml_elem->control = 1928 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1929 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1930 common = skb_put(skb, sizeof(*common)); 1931 common->len = sizeof(*common) + 1932 2; /* MLD capa/ops */ 1933 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1934 1935 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1936 if (eml_capa & 1937 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1938 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1939 common->len += 2; /* EML capabilities */ 1940 ml_elem->control |= 1941 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1942 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1943 } 1944 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1945 1946 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1947 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1948 const u8 *extra_elems; 1949 size_t extra_elems_len; 1950 size_t extra_used; 1951 u8 *subelem_len = NULL; 1952 __le16 ctrl; 1953 1954 if (!assoc_data->link[link_id].bss || 1955 link_id == assoc_data->assoc_link_id) 1956 continue; 1957 1958 extra_elems = assoc_data->link[link_id].elems; 1959 extra_elems_len = assoc_data->link[link_id].elems_len; 1960 1961 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1962 subelem_len = skb_put(skb, 1); 1963 1964 ctrl = cpu_to_le16(link_id | 1965 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1966 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1967 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1968 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1969 skb_put_data(skb, assoc_data->link[link_id].addr, 1970 ETH_ALEN); 1971 /* 1972 * Now add the contents of the (re)association request, 1973 * but the "listen interval" and "current AP address" 1974 * (if applicable) are skipped. So we only have 1975 * the capability field (remember the position and fill 1976 * later), followed by the elements added below by 1977 * calling ieee80211_add_link_elems(). 1978 */ 1979 capab_pos = skb_put(skb, 2); 1980 1981 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 1982 ext_capa, 1983 extra_elems, 1984 extra_elems_len, 1985 link_id, NULL, 1986 link_present_elems, 1987 assoc_data); 1988 if (extra_elems) 1989 skb_put_data(skb, extra_elems + extra_used, 1990 extra_elems_len - extra_used); 1991 1992 put_unaligned_le16(capab, capab_pos); 1993 1994 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1995 link_present_elems); 1996 1997 ieee80211_fragment_element(skb, subelem_len, 1998 IEEE80211_MLE_SUBELEM_FRAGMENT); 1999 } 2000 2001 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2002 } 2003 2004 static int 2005 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2006 enum nl80211_iftype iftype, 2007 struct cfg80211_bss *cbss, 2008 size_t elems_len) 2009 { 2010 struct ieee80211_local *local = sdata->local; 2011 const struct ieee80211_sband_iftype_data *iftd; 2012 struct ieee80211_supported_band *sband; 2013 size_t size = 0; 2014 2015 if (!cbss) 2016 return size; 2017 2018 sband = local->hw.wiphy->bands[cbss->channel->band]; 2019 2020 /* add STA profile elements length */ 2021 size += elems_len; 2022 2023 /* and supported rates length */ 2024 size += 4 + sband->n_bitrates; 2025 2026 /* supported channels */ 2027 size += 2 + 2 * sband->n_channels; 2028 2029 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2030 if (iftd) 2031 size += iftd->vendor_elems.len; 2032 2033 /* power capability */ 2034 size += 4; 2035 2036 /* HT, VHT, HE, EHT */ 2037 size += 2 + sizeof(struct ieee80211_ht_cap); 2038 size += 2 + sizeof(struct ieee80211_vht_cap); 2039 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2040 sizeof(struct ieee80211_he_mcs_nss_supp) + 2041 IEEE80211_HE_PPE_THRES_MAX_LEN; 2042 2043 if (sband->band == NL80211_BAND_6GHZ) 2044 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2045 2046 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2047 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2048 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2049 2050 return size; 2051 } 2052 2053 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2054 { 2055 struct ieee80211_local *local = sdata->local; 2056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2057 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2058 struct ieee80211_link_data *link; 2059 struct sk_buff *skb; 2060 struct ieee80211_mgmt *mgmt; 2061 u8 *pos, qos_info, *ie_start; 2062 size_t offset, noffset; 2063 u16 capab = 0, link_capab; 2064 __le16 listen_int; 2065 struct element *ext_capa = NULL; 2066 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2067 struct ieee80211_prep_tx_info info = {}; 2068 unsigned int link_id, n_links = 0; 2069 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2070 void *capab_pos; 2071 size_t size; 2072 int ret; 2073 2074 /* we know it's writable, cast away the const */ 2075 if (assoc_data->ie_len) 2076 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2077 assoc_data->ie, 2078 assoc_data->ie_len); 2079 2080 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2081 2082 size = local->hw.extra_tx_headroom + 2083 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2084 2 + assoc_data->ssid_len + /* SSID */ 2085 assoc_data->ie_len + /* extra IEs */ 2086 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2087 9; /* WMM */ 2088 2089 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2090 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2091 size_t elems_len = assoc_data->link[link_id].elems_len; 2092 2093 if (!cbss) 2094 continue; 2095 2096 n_links++; 2097 2098 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2099 elems_len); 2100 2101 /* non-inheritance element */ 2102 size += 2 + 2 + PRESENT_ELEMS_MAX; 2103 2104 /* should be the same across all BSSes */ 2105 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2106 capab |= WLAN_CAPABILITY_PRIVACY; 2107 } 2108 2109 if (ieee80211_vif_is_mld(&sdata->vif)) { 2110 /* consider the multi-link element with STA profile */ 2111 size += sizeof(struct ieee80211_multi_link_elem); 2112 /* max common info field in basic multi-link element */ 2113 size += sizeof(struct ieee80211_mle_basic_common_info) + 2114 2 + /* capa & op */ 2115 2; /* EML capa */ 2116 2117 /* 2118 * The capability elements were already considered above; 2119 * note this over-estimates a bit because there's no 2120 * STA profile for the assoc link. 2121 */ 2122 size += (n_links - 1) * 2123 (1 + 1 + /* subelement ID/length */ 2124 2 + /* STA control */ 2125 1 + ETH_ALEN + 2 /* STA Info field */); 2126 } 2127 2128 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2129 if (WARN_ON(!link)) 2130 return -EINVAL; 2131 2132 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2133 return -EINVAL; 2134 2135 skb = alloc_skb(size, GFP_KERNEL); 2136 if (!skb) 2137 return -ENOMEM; 2138 2139 skb_reserve(skb, local->hw.extra_tx_headroom); 2140 2141 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2142 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2143 2144 /* Set MBSSID support for HE AP if needed */ 2145 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2146 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2147 ext_capa && ext_capa->datalen >= 3) 2148 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2149 2150 mgmt = skb_put_zero(skb, 24); 2151 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2152 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2153 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2154 2155 listen_int = cpu_to_le16(assoc_data->s1g ? 2156 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2157 local->hw.conf.listen_interval); 2158 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2159 skb_put(skb, 10); 2160 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2161 IEEE80211_STYPE_REASSOC_REQ); 2162 capab_pos = &mgmt->u.reassoc_req.capab_info; 2163 mgmt->u.reassoc_req.listen_interval = listen_int; 2164 memcpy(mgmt->u.reassoc_req.current_ap, 2165 assoc_data->prev_ap_addr, ETH_ALEN); 2166 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2167 } else { 2168 skb_put(skb, 4); 2169 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2170 IEEE80211_STYPE_ASSOC_REQ); 2171 capab_pos = &mgmt->u.assoc_req.capab_info; 2172 mgmt->u.assoc_req.listen_interval = listen_int; 2173 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2174 } 2175 2176 /* SSID */ 2177 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2178 ie_start = pos; 2179 *pos++ = WLAN_EID_SSID; 2180 *pos++ = assoc_data->ssid_len; 2181 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2182 2183 /* 2184 * This bit is technically reserved, so it shouldn't matter for either 2185 * the AP or us, but it also means we shouldn't set it. However, we've 2186 * always set it in the past, and apparently some EHT APs check that 2187 * we don't set it. To avoid interoperability issues with old APs that 2188 * for some reason check it and want it to be set, set the bit for all 2189 * pre-EHT connections as we used to do. 2190 */ 2191 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2192 !ieee80211_hw_check(&local->hw, STRICT)) 2193 capab |= WLAN_CAPABILITY_ESS; 2194 2195 /* add the elements for the assoc (main) link */ 2196 link_capab = capab; 2197 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2198 ext_capa, 2199 assoc_data->ie, 2200 assoc_data->ie_len, 2201 assoc_data->assoc_link_id, link, 2202 present_elems, assoc_data); 2203 put_unaligned_le16(link_capab, capab_pos); 2204 2205 /* if present, add any custom non-vendor IEs */ 2206 if (assoc_data->ie_len) { 2207 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2208 assoc_data->ie_len, 2209 offset); 2210 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2211 offset = noffset; 2212 } 2213 2214 if (assoc_data->wmm) { 2215 if (assoc_data->uapsd) { 2216 qos_info = ifmgd->uapsd_queues; 2217 qos_info |= (ifmgd->uapsd_max_sp_len << 2218 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2219 } else { 2220 qos_info = 0; 2221 } 2222 2223 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2224 } 2225 2226 /* add any remaining custom (i.e. vendor specific here) IEs */ 2227 if (assoc_data->ie_len) { 2228 noffset = assoc_data->ie_len; 2229 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2230 } 2231 2232 if (assoc_data->fils_kek_len) { 2233 ret = fils_encrypt_assoc_req(skb, assoc_data); 2234 if (ret < 0) { 2235 dev_kfree_skb(skb); 2236 return ret; 2237 } 2238 } 2239 2240 pos = skb_tail_pointer(skb); 2241 kfree(ifmgd->assoc_req_ies); 2242 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2243 if (!ifmgd->assoc_req_ies) { 2244 dev_kfree_skb(skb); 2245 return -ENOMEM; 2246 } 2247 2248 ifmgd->assoc_req_ies_len = pos - ie_start; 2249 2250 info.link_id = assoc_data->assoc_link_id; 2251 drv_mgd_prepare_tx(local, sdata, &info); 2252 2253 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2254 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2255 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2256 IEEE80211_TX_INTFL_MLME_CONN_TX; 2257 ieee80211_tx_skb(sdata, skb); 2258 2259 return 0; 2260 } 2261 2262 void ieee80211_send_pspoll(struct ieee80211_local *local, 2263 struct ieee80211_sub_if_data *sdata) 2264 { 2265 struct ieee80211_pspoll *pspoll; 2266 struct sk_buff *skb; 2267 2268 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2269 if (!skb) 2270 return; 2271 2272 pspoll = (struct ieee80211_pspoll *) skb->data; 2273 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2274 2275 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2276 ieee80211_tx_skb(sdata, skb); 2277 } 2278 2279 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2280 struct ieee80211_sub_if_data *sdata, 2281 bool powersave) 2282 { 2283 struct sk_buff *skb; 2284 struct ieee80211_hdr_3addr *nullfunc; 2285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2286 2287 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2288 !ieee80211_hw_check(&local->hw, 2289 DOESNT_SUPPORT_QOS_NDP)); 2290 if (!skb) 2291 return; 2292 2293 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2294 if (powersave) 2295 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2296 2297 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2298 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2299 2300 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2301 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2302 2303 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2304 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2305 2306 ieee80211_tx_skb(sdata, skb); 2307 } 2308 2309 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2310 struct ieee80211_sub_if_data *sdata) 2311 { 2312 struct sk_buff *skb; 2313 struct ieee80211_hdr *nullfunc; 2314 __le16 fc; 2315 2316 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2317 return; 2318 2319 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2320 if (!skb) 2321 return; 2322 2323 skb_reserve(skb, local->hw.extra_tx_headroom); 2324 2325 nullfunc = skb_put_zero(skb, 30); 2326 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2327 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2328 nullfunc->frame_control = fc; 2329 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2330 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2331 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2332 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2333 2334 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2335 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2336 ieee80211_tx_skb(sdata, skb); 2337 } 2338 2339 /* spectrum management related things */ 2340 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2341 struct wiphy_work *work) 2342 { 2343 struct ieee80211_link_data *link = 2344 container_of(work, struct ieee80211_link_data, 2345 u.mgd.csa.switch_work.work); 2346 struct ieee80211_sub_if_data *sdata = link->sdata; 2347 struct ieee80211_local *local = sdata->local; 2348 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2349 int ret; 2350 2351 if (!ieee80211_sdata_running(sdata)) 2352 return; 2353 2354 lockdep_assert_wiphy(local->hw.wiphy); 2355 2356 if (!ifmgd->associated) 2357 return; 2358 2359 if (!link->conf->csa_active) 2360 return; 2361 2362 /* 2363 * If the link isn't active (now), we cannot wait for beacons, won't 2364 * have a reserved chanctx, etc. Just switch over the chandef and 2365 * update cfg80211 directly. 2366 */ 2367 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2368 link->conf->chanreq = link->csa.chanreq; 2369 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2370 link->link_id); 2371 return; 2372 } 2373 2374 /* 2375 * using reservation isn't immediate as it may be deferred until later 2376 * with multi-vif. once reservation is complete it will re-schedule the 2377 * work with no reserved_chanctx so verify chandef to check if it 2378 * completed successfully 2379 */ 2380 2381 if (link->reserved_chanctx) { 2382 /* 2383 * with multi-vif csa driver may call ieee80211_csa_finish() 2384 * many times while waiting for other interfaces to use their 2385 * reservations 2386 */ 2387 if (link->reserved_ready) 2388 return; 2389 2390 ret = ieee80211_link_use_reserved_context(link); 2391 if (ret) { 2392 link_info(link, 2393 "failed to use reserved channel context, disconnecting (err=%d)\n", 2394 ret); 2395 wiphy_work_queue(sdata->local->hw.wiphy, 2396 &ifmgd->csa_connection_drop_work); 2397 } 2398 return; 2399 } 2400 2401 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2402 &link->csa.chanreq)) { 2403 link_info(link, 2404 "failed to finalize channel switch, disconnecting\n"); 2405 wiphy_work_queue(sdata->local->hw.wiphy, 2406 &ifmgd->csa_connection_drop_work); 2407 return; 2408 } 2409 2410 link->u.mgd.csa.waiting_bcn = true; 2411 2412 /* apply new TPE restrictions immediately on the new channel */ 2413 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2414 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2415 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2416 &link->u.mgd.csa.ap_chandef, 2417 &link->conf->chanreq.oper); 2418 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2419 sizeof(link->u.mgd.csa.tpe))) { 2420 link->conf->tpe = link->u.mgd.csa.tpe; 2421 ieee80211_link_info_change_notify(sdata, link, 2422 BSS_CHANGED_TPE); 2423 } 2424 } 2425 2426 ieee80211_sta_reset_beacon_monitor(sdata); 2427 ieee80211_sta_reset_conn_monitor(sdata); 2428 } 2429 2430 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2431 { 2432 struct ieee80211_sub_if_data *sdata = link->sdata; 2433 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2434 int ret; 2435 2436 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2437 2438 WARN_ON(!link->conf->csa_active); 2439 2440 ieee80211_vif_unblock_queues_csa(sdata); 2441 2442 link->conf->csa_active = false; 2443 link->u.mgd.csa.blocked_tx = false; 2444 link->u.mgd.csa.waiting_bcn = false; 2445 2446 ret = drv_post_channel_switch(link); 2447 if (ret) { 2448 link_info(link, 2449 "driver post channel switch failed, disconnecting\n"); 2450 wiphy_work_queue(sdata->local->hw.wiphy, 2451 &ifmgd->csa_connection_drop_work); 2452 return; 2453 } 2454 2455 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2456 link->link_id); 2457 } 2458 2459 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2460 unsigned int link_id) 2461 { 2462 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2463 2464 trace_api_chswitch_done(sdata, success, link_id); 2465 2466 rcu_read_lock(); 2467 2468 if (!success) { 2469 sdata_info(sdata, 2470 "driver channel switch failed (link %d), disconnecting\n", 2471 link_id); 2472 wiphy_work_queue(sdata->local->hw.wiphy, 2473 &sdata->u.mgd.csa_connection_drop_work); 2474 } else { 2475 struct ieee80211_link_data *link = 2476 rcu_dereference(sdata->link[link_id]); 2477 2478 if (WARN_ON(!link)) { 2479 rcu_read_unlock(); 2480 return; 2481 } 2482 2483 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2484 &link->u.mgd.csa.switch_work, 0); 2485 } 2486 2487 rcu_read_unlock(); 2488 } 2489 EXPORT_SYMBOL(ieee80211_chswitch_done); 2490 2491 static void 2492 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2493 { 2494 struct ieee80211_sub_if_data *sdata = link->sdata; 2495 struct ieee80211_local *local = sdata->local; 2496 2497 lockdep_assert_wiphy(local->hw.wiphy); 2498 2499 if (!local->ops->abort_channel_switch) 2500 return; 2501 2502 ieee80211_link_unreserve_chanctx(link); 2503 2504 ieee80211_vif_unblock_queues_csa(sdata); 2505 2506 link->conf->csa_active = false; 2507 link->u.mgd.csa.blocked_tx = false; 2508 2509 drv_abort_channel_switch(link); 2510 } 2511 2512 struct sta_csa_rnr_iter_data { 2513 struct ieee80211_link_data *link; 2514 struct ieee80211_channel *chan; 2515 u8 mld_id; 2516 }; 2517 2518 static enum cfg80211_rnr_iter_ret 2519 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2520 const struct ieee80211_neighbor_ap_info *info, 2521 const u8 *tbtt_info, u8 tbtt_info_len) 2522 { 2523 struct sta_csa_rnr_iter_data *data = _data; 2524 struct ieee80211_link_data *link = data->link; 2525 struct ieee80211_sub_if_data *sdata = link->sdata; 2526 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2527 const struct ieee80211_tbtt_info_ge_11 *ti; 2528 enum nl80211_band band; 2529 unsigned int center_freq; 2530 int link_id; 2531 2532 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2533 return RNR_ITER_CONTINUE; 2534 2535 if (tbtt_info_len < sizeof(*ti)) 2536 return RNR_ITER_CONTINUE; 2537 2538 ti = (const void *)tbtt_info; 2539 2540 if (ti->mld_params.mld_id != data->mld_id) 2541 return RNR_ITER_CONTINUE; 2542 2543 link_id = le16_get_bits(ti->mld_params.params, 2544 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2545 if (link_id != data->link->link_id) 2546 return RNR_ITER_CONTINUE; 2547 2548 /* we found the entry for our link! */ 2549 2550 /* this AP is confused, it had this right before ... just disconnect */ 2551 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2552 link_info(link, 2553 "AP now has invalid operating class in RNR, disconnect\n"); 2554 wiphy_work_queue(sdata->local->hw.wiphy, 2555 &ifmgd->csa_connection_drop_work); 2556 return RNR_ITER_BREAK; 2557 } 2558 2559 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2560 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2561 2562 return RNR_ITER_BREAK; 2563 } 2564 2565 static void 2566 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2567 struct ieee802_11_elems *elems) 2568 { 2569 struct ieee80211_sub_if_data *sdata = link->sdata; 2570 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2571 struct sta_csa_rnr_iter_data data = { 2572 .link = link, 2573 }; 2574 2575 /* 2576 * If we get here, we see a beacon from another link without 2577 * CSA still being reported for it, so now we have to check 2578 * if the CSA was aborted or completed. This may not even be 2579 * perfectly possible if the CSA was only done for changing 2580 * the puncturing, but in that case if the link in inactive 2581 * we don't really care, and if it's an active link (or when 2582 * it's activated later) we'll get a beacon and adjust. 2583 */ 2584 2585 if (WARN_ON(!elems->ml_basic)) 2586 return; 2587 2588 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2589 2590 /* 2591 * So in order to do this, iterate the RNR element(s) and see 2592 * what channel is reported now. 2593 */ 2594 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2595 ieee80211_sta_csa_rnr_iter, &data); 2596 2597 if (!data.chan) { 2598 link_info(link, 2599 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2600 wiphy_work_queue(sdata->local->hw.wiphy, 2601 &ifmgd->csa_connection_drop_work); 2602 return; 2603 } 2604 2605 /* 2606 * If it doesn't match the CSA, then assume it aborted. This 2607 * may erroneously detect that it was _not_ aborted when it 2608 * was in fact aborted, but only changed the bandwidth or the 2609 * puncturing configuration, but we don't have enough data to 2610 * detect that. 2611 */ 2612 if (data.chan != link->csa.chanreq.oper.chan) 2613 ieee80211_sta_abort_chanswitch(link); 2614 } 2615 2616 enum ieee80211_csa_source { 2617 IEEE80211_CSA_SOURCE_BEACON, 2618 IEEE80211_CSA_SOURCE_OTHER_LINK, 2619 IEEE80211_CSA_SOURCE_PROT_ACTION, 2620 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2621 }; 2622 2623 static void 2624 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2625 u64 timestamp, u32 device_timestamp, 2626 struct ieee802_11_elems *full_elems, 2627 struct ieee802_11_elems *csa_elems, 2628 enum ieee80211_csa_source source) 2629 { 2630 struct ieee80211_sub_if_data *sdata = link->sdata; 2631 struct ieee80211_local *local = sdata->local; 2632 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2633 struct ieee80211_chanctx *chanctx = NULL; 2634 struct ieee80211_chanctx_conf *conf; 2635 struct ieee80211_csa_ie csa_ie = {}; 2636 struct ieee80211_channel_switch ch_switch = { 2637 .link_id = link->link_id, 2638 .timestamp = timestamp, 2639 .device_timestamp = device_timestamp, 2640 }; 2641 unsigned long now; 2642 int res; 2643 2644 lockdep_assert_wiphy(local->hw.wiphy); 2645 2646 if (csa_elems) { 2647 struct cfg80211_bss *cbss = link->conf->bss; 2648 enum nl80211_band current_band; 2649 struct ieee80211_bss *bss; 2650 2651 if (WARN_ON(!cbss)) 2652 return; 2653 2654 current_band = cbss->channel->band; 2655 bss = (void *)cbss->priv; 2656 2657 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2658 current_band, 2659 bss->vht_cap_info, 2660 &link->u.mgd.conn, 2661 link->u.mgd.bssid, 2662 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2663 &csa_ie); 2664 if (res == 0) { 2665 ch_switch.block_tx = csa_ie.mode; 2666 ch_switch.chandef = csa_ie.chanreq.oper; 2667 ch_switch.count = csa_ie.count; 2668 ch_switch.delay = csa_ie.max_switch_time; 2669 } 2670 2671 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2672 } else { 2673 /* 2674 * If there was no per-STA profile for this link, we 2675 * get called with csa_elems == NULL. This of course means 2676 * there are no CSA elements, so set res=1 indicating 2677 * no more CSA. 2678 */ 2679 res = 1; 2680 } 2681 2682 if (res < 0) { 2683 /* ignore this case, not a protected frame */ 2684 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2685 return; 2686 goto drop_connection; 2687 } 2688 2689 if (link->conf->csa_active) { 2690 switch (source) { 2691 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2692 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2693 /* already processing - disregard action frames */ 2694 return; 2695 case IEEE80211_CSA_SOURCE_BEACON: 2696 if (link->u.mgd.csa.waiting_bcn) { 2697 ieee80211_chswitch_post_beacon(link); 2698 /* 2699 * If the CSA is still present after the switch 2700 * we need to consider it as a new CSA (possibly 2701 * to self). This happens by not returning here 2702 * so we'll get to the check below. 2703 */ 2704 } else if (res) { 2705 ieee80211_sta_abort_chanswitch(link); 2706 return; 2707 } else { 2708 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2709 return; 2710 } 2711 break; 2712 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2713 /* active link: we want to see the beacon to continue */ 2714 if (ieee80211_vif_link_active(&sdata->vif, 2715 link->link_id)) 2716 return; 2717 2718 /* switch work ran, so just complete the process */ 2719 if (link->u.mgd.csa.waiting_bcn) { 2720 ieee80211_chswitch_post_beacon(link); 2721 /* 2722 * If the CSA is still present after the switch 2723 * we need to consider it as a new CSA (possibly 2724 * to self). This happens by not returning here 2725 * so we'll get to the check below. 2726 */ 2727 break; 2728 } 2729 2730 /* link still has CSA but we already know, do nothing */ 2731 if (!res) 2732 return; 2733 2734 /* check in the RNR if the CSA aborted */ 2735 ieee80211_sta_other_link_csa_disappeared(link, 2736 full_elems); 2737 return; 2738 } 2739 } 2740 2741 /* no active CSA nor a new one */ 2742 if (res) { 2743 /* 2744 * However, we may have stopped queues when receiving a public 2745 * action frame that couldn't be protected, if it had the quiet 2746 * bit set. This is a trade-off, we want to be quiet as soon as 2747 * possible, but also don't trust the public action frame much, 2748 * as it can't be protected. 2749 */ 2750 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2751 link->u.mgd.csa.blocked_tx = false; 2752 ieee80211_vif_unblock_queues_csa(sdata); 2753 } 2754 return; 2755 } 2756 2757 /* 2758 * We don't really trust public action frames, but block queues (go to 2759 * quiet mode) for them anyway, we should get a beacon soon to either 2760 * know what the CSA really is, or figure out the public action frame 2761 * was actually an attack. 2762 */ 2763 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2764 if (csa_ie.mode) { 2765 link->u.mgd.csa.blocked_tx = true; 2766 ieee80211_vif_block_queues_csa(sdata); 2767 } 2768 return; 2769 } 2770 2771 if (link->conf->chanreq.oper.chan->band != 2772 csa_ie.chanreq.oper.chan->band) { 2773 link_info(link, 2774 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2775 link->u.mgd.bssid, 2776 csa_ie.chanreq.oper.chan->center_freq, 2777 csa_ie.chanreq.oper.width, 2778 csa_ie.chanreq.oper.center_freq1, 2779 csa_ie.chanreq.oper.center_freq2); 2780 goto drop_connection; 2781 } 2782 2783 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2784 IEEE80211_CHAN_DISABLED)) { 2785 link_info(link, 2786 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2787 link->u.mgd.bssid, 2788 csa_ie.chanreq.oper.chan->center_freq, 2789 csa_ie.chanreq.oper.chan->freq_offset, 2790 csa_ie.chanreq.oper.width, 2791 csa_ie.chanreq.oper.center_freq1, 2792 csa_ie.chanreq.oper.freq1_offset, 2793 csa_ie.chanreq.oper.center_freq2); 2794 goto drop_connection; 2795 } 2796 2797 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2798 &link->conf->chanreq.oper) && 2799 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2800 if (link->u.mgd.csa.ignored_same_chan) 2801 return; 2802 link_info(link, 2803 "AP %pM tries to chanswitch to same channel, ignore\n", 2804 link->u.mgd.bssid); 2805 link->u.mgd.csa.ignored_same_chan = true; 2806 return; 2807 } 2808 2809 /* 2810 * Drop all TDLS peers on the affected link - either we disconnect or 2811 * move to a different channel from this point on. There's no telling 2812 * what our peer will do. 2813 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2814 * have an incompatible wider chandef. 2815 */ 2816 ieee80211_teardown_tdls_peers(link); 2817 2818 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2819 lockdep_is_held(&local->hw.wiphy->mtx)); 2820 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2821 link_info(link, 2822 "no channel context assigned to vif?, disconnecting\n"); 2823 goto drop_connection; 2824 } 2825 2826 if (conf) 2827 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2828 2829 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2830 link_info(link, 2831 "driver doesn't support chan-switch with channel contexts\n"); 2832 goto drop_connection; 2833 } 2834 2835 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2836 link_info(link, 2837 "preparing for channel switch failed, disconnecting\n"); 2838 goto drop_connection; 2839 } 2840 2841 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2842 2843 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2844 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2845 &csa_ie.chanreq.ap); 2846 2847 if (chanctx) { 2848 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2849 chanctx->mode, false); 2850 if (res) { 2851 link_info(link, 2852 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2853 res); 2854 goto drop_connection; 2855 } 2856 } 2857 2858 link->conf->csa_active = true; 2859 link->u.mgd.csa.ignored_same_chan = false; 2860 link->u.mgd.beacon_crc_valid = false; 2861 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2862 2863 if (csa_ie.mode) 2864 ieee80211_vif_block_queues_csa(sdata); 2865 2866 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2867 link->link_id, csa_ie.count, 2868 csa_ie.mode); 2869 2870 /* we may have to handle timeout for deactivated link in software */ 2871 now = jiffies; 2872 link->u.mgd.csa.time = now + 2873 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2874 link->conf->beacon_int); 2875 2876 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2877 local->ops->channel_switch) { 2878 /* 2879 * Use driver's channel switch callback, the driver will 2880 * later call ieee80211_chswitch_done(). It may deactivate 2881 * the link as well, we handle that elsewhere and queue 2882 * the csa.switch_work for the calculated time then. 2883 */ 2884 drv_channel_switch(local, sdata, &ch_switch); 2885 return; 2886 } 2887 2888 /* channel switch handled in software */ 2889 wiphy_delayed_work_queue(local->hw.wiphy, 2890 &link->u.mgd.csa.switch_work, 2891 link->u.mgd.csa.time - now); 2892 return; 2893 drop_connection: 2894 /* 2895 * This is just so that the disconnect flow will know that 2896 * we were trying to switch channel and failed. In case the 2897 * mode is 1 (we are not allowed to Tx), we will know not to 2898 * send a deauthentication frame. Those two fields will be 2899 * reset when the disconnection worker runs. 2900 */ 2901 link->conf->csa_active = true; 2902 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2903 2904 wiphy_work_queue(sdata->local->hw.wiphy, 2905 &ifmgd->csa_connection_drop_work); 2906 } 2907 2908 struct sta_bss_param_ch_cnt_data { 2909 struct ieee80211_sub_if_data *sdata; 2910 u8 reporting_link_id; 2911 u8 mld_id; 2912 }; 2913 2914 static enum cfg80211_rnr_iter_ret 2915 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2916 const struct ieee80211_neighbor_ap_info *info, 2917 const u8 *tbtt_info, u8 tbtt_info_len) 2918 { 2919 struct sta_bss_param_ch_cnt_data *data = _data; 2920 struct ieee80211_sub_if_data *sdata = data->sdata; 2921 const struct ieee80211_tbtt_info_ge_11 *ti; 2922 u8 bss_param_ch_cnt; 2923 int link_id; 2924 2925 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2926 return RNR_ITER_CONTINUE; 2927 2928 if (tbtt_info_len < sizeof(*ti)) 2929 return RNR_ITER_CONTINUE; 2930 2931 ti = (const void *)tbtt_info; 2932 2933 if (ti->mld_params.mld_id != data->mld_id) 2934 return RNR_ITER_CONTINUE; 2935 2936 link_id = le16_get_bits(ti->mld_params.params, 2937 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2938 bss_param_ch_cnt = 2939 le16_get_bits(ti->mld_params.params, 2940 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 2941 2942 if (bss_param_ch_cnt != 255 && 2943 link_id < ARRAY_SIZE(sdata->link)) { 2944 struct ieee80211_link_data *link = 2945 sdata_dereference(sdata->link[link_id], sdata); 2946 2947 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 2948 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 2949 link->conf->bss_param_ch_cnt_link_id = 2950 data->reporting_link_id; 2951 } 2952 } 2953 2954 return RNR_ITER_CONTINUE; 2955 } 2956 2957 static void 2958 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 2959 struct ieee80211_bss_conf *bss_conf, 2960 struct ieee802_11_elems *elems) 2961 { 2962 struct sta_bss_param_ch_cnt_data data = { 2963 .reporting_link_id = bss_conf->link_id, 2964 .sdata = sdata, 2965 }; 2966 int bss_param_ch_cnt; 2967 2968 if (!elems->ml_basic) 2969 return; 2970 2971 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2972 2973 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2974 ieee80211_sta_bss_param_ch_cnt_iter, &data); 2975 2976 bss_param_ch_cnt = 2977 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 2978 2979 /* 2980 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 2981 * didn't change to indicate that we got a beacon on our own 2982 * link. 2983 */ 2984 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 2985 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 2986 bss_conf->bss_param_ch_cnt_link_id = 2987 bss_conf->link_id; 2988 } 2989 } 2990 2991 static bool 2992 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 2993 const u8 *country_ie, u8 country_ie_len, 2994 const u8 *pwr_constr_elem, 2995 int *chan_pwr, int *pwr_reduction) 2996 { 2997 struct ieee80211_country_ie_triplet *triplet; 2998 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2999 int i, chan_increment; 3000 bool have_chan_pwr = false; 3001 3002 /* Invalid IE */ 3003 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3004 return false; 3005 3006 triplet = (void *)(country_ie + 3); 3007 country_ie_len -= 3; 3008 3009 switch (channel->band) { 3010 default: 3011 WARN_ON_ONCE(1); 3012 fallthrough; 3013 case NL80211_BAND_2GHZ: 3014 case NL80211_BAND_60GHZ: 3015 case NL80211_BAND_LC: 3016 chan_increment = 1; 3017 break; 3018 case NL80211_BAND_5GHZ: 3019 chan_increment = 4; 3020 break; 3021 case NL80211_BAND_6GHZ: 3022 /* 3023 * In the 6 GHz band, the "maximum transmit power level" 3024 * field in the triplets is reserved, and thus will be 3025 * zero and we shouldn't use it to control TX power. 3026 * The actual TX power will be given in the transmit 3027 * power envelope element instead. 3028 */ 3029 return false; 3030 } 3031 3032 /* find channel */ 3033 while (country_ie_len >= 3) { 3034 u8 first_channel = triplet->chans.first_channel; 3035 3036 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3037 goto next; 3038 3039 for (i = 0; i < triplet->chans.num_channels; i++) { 3040 if (first_channel + i * chan_increment == chan) { 3041 have_chan_pwr = true; 3042 *chan_pwr = triplet->chans.max_power; 3043 break; 3044 } 3045 } 3046 if (have_chan_pwr) 3047 break; 3048 3049 next: 3050 triplet++; 3051 country_ie_len -= 3; 3052 } 3053 3054 if (have_chan_pwr && pwr_constr_elem) 3055 *pwr_reduction = *pwr_constr_elem; 3056 else 3057 *pwr_reduction = 0; 3058 3059 return have_chan_pwr; 3060 } 3061 3062 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3063 const u8 *cisco_dtpc_ie, 3064 int *pwr_level) 3065 { 3066 /* From practical testing, the first data byte of the DTPC element 3067 * seems to contain the requested dBm level, and the CLI on Cisco 3068 * APs clearly state the range is -127 to 127 dBm, which indicates 3069 * a signed byte, although it seemingly never actually goes negative. 3070 * The other byte seems to always be zero. 3071 */ 3072 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3073 } 3074 3075 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3076 struct ieee80211_channel *channel, 3077 struct ieee80211_mgmt *mgmt, 3078 const u8 *country_ie, u8 country_ie_len, 3079 const u8 *pwr_constr_ie, 3080 const u8 *cisco_dtpc_ie) 3081 { 3082 struct ieee80211_sub_if_data *sdata = link->sdata; 3083 bool has_80211h_pwr = false, has_cisco_pwr = false; 3084 int chan_pwr = 0, pwr_reduction_80211h = 0; 3085 int pwr_level_cisco, pwr_level_80211h; 3086 int new_ap_level; 3087 __le16 capab = mgmt->u.probe_resp.capab_info; 3088 3089 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3090 return 0; /* TODO */ 3091 3092 if (country_ie && 3093 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3094 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3095 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3096 channel, country_ie, country_ie_len, 3097 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3098 pwr_level_80211h = 3099 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3100 } 3101 3102 if (cisco_dtpc_ie) { 3103 ieee80211_find_cisco_dtpc( 3104 channel, cisco_dtpc_ie, &pwr_level_cisco); 3105 has_cisco_pwr = true; 3106 } 3107 3108 if (!has_80211h_pwr && !has_cisco_pwr) 3109 return 0; 3110 3111 /* If we have both 802.11h and Cisco DTPC, apply both limits 3112 * by picking the smallest of the two power levels advertised. 3113 */ 3114 if (has_80211h_pwr && 3115 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3116 new_ap_level = pwr_level_80211h; 3117 3118 if (link->ap_power_level == new_ap_level) 3119 return 0; 3120 3121 sdata_dbg(sdata, 3122 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3123 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3124 link->u.mgd.bssid); 3125 } else { /* has_cisco_pwr is always true here. */ 3126 new_ap_level = pwr_level_cisco; 3127 3128 if (link->ap_power_level == new_ap_level) 3129 return 0; 3130 3131 sdata_dbg(sdata, 3132 "Limiting TX power to %d dBm as advertised by %pM\n", 3133 pwr_level_cisco, link->u.mgd.bssid); 3134 } 3135 3136 link->ap_power_level = new_ap_level; 3137 if (__ieee80211_recalc_txpower(link)) 3138 return BSS_CHANGED_TXPOWER; 3139 return 0; 3140 } 3141 3142 /* powersave */ 3143 static void ieee80211_enable_ps(struct ieee80211_local *local, 3144 struct ieee80211_sub_if_data *sdata) 3145 { 3146 struct ieee80211_conf *conf = &local->hw.conf; 3147 3148 /* 3149 * If we are scanning right now then the parameters will 3150 * take effect when scan finishes. 3151 */ 3152 if (local->scanning) 3153 return; 3154 3155 if (conf->dynamic_ps_timeout > 0 && 3156 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3157 mod_timer(&local->dynamic_ps_timer, jiffies + 3158 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3159 } else { 3160 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3161 ieee80211_send_nullfunc(local, sdata, true); 3162 3163 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3164 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3165 return; 3166 3167 conf->flags |= IEEE80211_CONF_PS; 3168 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3169 } 3170 } 3171 3172 static void ieee80211_change_ps(struct ieee80211_local *local) 3173 { 3174 struct ieee80211_conf *conf = &local->hw.conf; 3175 3176 if (local->ps_sdata) { 3177 ieee80211_enable_ps(local, local->ps_sdata); 3178 } else if (conf->flags & IEEE80211_CONF_PS) { 3179 conf->flags &= ~IEEE80211_CONF_PS; 3180 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3181 del_timer_sync(&local->dynamic_ps_timer); 3182 wiphy_work_cancel(local->hw.wiphy, 3183 &local->dynamic_ps_enable_work); 3184 } 3185 } 3186 3187 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3188 { 3189 struct ieee80211_local *local = sdata->local; 3190 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3191 struct sta_info *sta = NULL; 3192 bool authorized = false; 3193 3194 if (!mgd->powersave) 3195 return false; 3196 3197 if (mgd->broken_ap) 3198 return false; 3199 3200 if (!mgd->associated) 3201 return false; 3202 3203 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3204 return false; 3205 3206 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3207 !sdata->deflink.u.mgd.have_beacon) 3208 return false; 3209 3210 rcu_read_lock(); 3211 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3212 if (sta) 3213 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3214 rcu_read_unlock(); 3215 3216 return authorized; 3217 } 3218 3219 /* need to hold RTNL or interface lock */ 3220 void ieee80211_recalc_ps(struct ieee80211_local *local) 3221 { 3222 struct ieee80211_sub_if_data *sdata, *found = NULL; 3223 int count = 0; 3224 int timeout; 3225 3226 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3227 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3228 local->ps_sdata = NULL; 3229 return; 3230 } 3231 3232 list_for_each_entry(sdata, &local->interfaces, list) { 3233 if (!ieee80211_sdata_running(sdata)) 3234 continue; 3235 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3236 /* If an AP vif is found, then disable PS 3237 * by setting the count to zero thereby setting 3238 * ps_sdata to NULL. 3239 */ 3240 count = 0; 3241 break; 3242 } 3243 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3244 continue; 3245 found = sdata; 3246 count++; 3247 } 3248 3249 if (count == 1 && ieee80211_powersave_allowed(found)) { 3250 u8 dtimper = found->deflink.u.mgd.dtim_period; 3251 3252 timeout = local->dynamic_ps_forced_timeout; 3253 if (timeout < 0) 3254 timeout = 100; 3255 local->hw.conf.dynamic_ps_timeout = timeout; 3256 3257 /* If the TIM IE is invalid, pretend the value is 1 */ 3258 if (!dtimper) 3259 dtimper = 1; 3260 3261 local->hw.conf.ps_dtim_period = dtimper; 3262 local->ps_sdata = found; 3263 } else { 3264 local->ps_sdata = NULL; 3265 } 3266 3267 ieee80211_change_ps(local); 3268 } 3269 3270 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3271 { 3272 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3273 3274 if (sdata->vif.cfg.ps != ps_allowed) { 3275 sdata->vif.cfg.ps = ps_allowed; 3276 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3277 } 3278 } 3279 3280 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3281 struct wiphy_work *work) 3282 { 3283 struct ieee80211_local *local = 3284 container_of(work, struct ieee80211_local, 3285 dynamic_ps_disable_work); 3286 3287 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3288 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3289 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3290 } 3291 3292 ieee80211_wake_queues_by_reason(&local->hw, 3293 IEEE80211_MAX_QUEUE_MAP, 3294 IEEE80211_QUEUE_STOP_REASON_PS, 3295 false); 3296 } 3297 3298 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3299 struct wiphy_work *work) 3300 { 3301 struct ieee80211_local *local = 3302 container_of(work, struct ieee80211_local, 3303 dynamic_ps_enable_work); 3304 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3305 struct ieee80211_if_managed *ifmgd; 3306 unsigned long flags; 3307 int q; 3308 3309 /* can only happen when PS was just disabled anyway */ 3310 if (!sdata) 3311 return; 3312 3313 ifmgd = &sdata->u.mgd; 3314 3315 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3316 return; 3317 3318 if (local->hw.conf.dynamic_ps_timeout > 0) { 3319 /* don't enter PS if TX frames are pending */ 3320 if (drv_tx_frames_pending(local)) { 3321 mod_timer(&local->dynamic_ps_timer, jiffies + 3322 msecs_to_jiffies( 3323 local->hw.conf.dynamic_ps_timeout)); 3324 return; 3325 } 3326 3327 /* 3328 * transmission can be stopped by others which leads to 3329 * dynamic_ps_timer expiry. Postpone the ps timer if it 3330 * is not the actual idle state. 3331 */ 3332 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3333 for (q = 0; q < local->hw.queues; q++) { 3334 if (local->queue_stop_reasons[q]) { 3335 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3336 flags); 3337 mod_timer(&local->dynamic_ps_timer, jiffies + 3338 msecs_to_jiffies( 3339 local->hw.conf.dynamic_ps_timeout)); 3340 return; 3341 } 3342 } 3343 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3344 } 3345 3346 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3347 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3348 if (drv_tx_frames_pending(local)) { 3349 mod_timer(&local->dynamic_ps_timer, jiffies + 3350 msecs_to_jiffies( 3351 local->hw.conf.dynamic_ps_timeout)); 3352 } else { 3353 ieee80211_send_nullfunc(local, sdata, true); 3354 /* Flush to get the tx status of nullfunc frame */ 3355 ieee80211_flush_queues(local, sdata, false); 3356 } 3357 } 3358 3359 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3360 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3361 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3362 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3363 local->hw.conf.flags |= IEEE80211_CONF_PS; 3364 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3365 } 3366 } 3367 3368 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3369 { 3370 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3371 3372 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3373 } 3374 3375 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3376 { 3377 struct ieee80211_link_data *link = 3378 container_of(work, struct ieee80211_link_data, 3379 dfs_cac_timer_work.work); 3380 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3381 struct ieee80211_sub_if_data *sdata = link->sdata; 3382 3383 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3384 3385 if (sdata->wdev.links[link->link_id].cac_started) { 3386 ieee80211_link_release_channel(link); 3387 cfg80211_cac_event(sdata->dev, &chandef, 3388 NL80211_RADAR_CAC_FINISHED, 3389 GFP_KERNEL, link->link_id); 3390 } 3391 } 3392 3393 static bool 3394 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3395 { 3396 struct ieee80211_local *local = sdata->local; 3397 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3398 bool ret = false; 3399 int ac; 3400 3401 if (local->hw.queues < IEEE80211_NUM_ACS) 3402 return false; 3403 3404 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3405 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3406 int non_acm_ac; 3407 unsigned long now = jiffies; 3408 3409 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3410 tx_tspec->admitted_time && 3411 time_after(now, tx_tspec->time_slice_start + HZ)) { 3412 tx_tspec->consumed_tx_time = 0; 3413 tx_tspec->time_slice_start = now; 3414 3415 if (tx_tspec->downgraded) 3416 tx_tspec->action = 3417 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3418 } 3419 3420 switch (tx_tspec->action) { 3421 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3422 /* take the original parameters */ 3423 if (drv_conf_tx(local, &sdata->deflink, ac, 3424 &sdata->deflink.tx_conf[ac])) 3425 link_err(&sdata->deflink, 3426 "failed to set TX queue parameters for queue %d\n", 3427 ac); 3428 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3429 tx_tspec->downgraded = false; 3430 ret = true; 3431 break; 3432 case TX_TSPEC_ACTION_DOWNGRADE: 3433 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3434 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3435 ret = true; 3436 break; 3437 } 3438 /* downgrade next lower non-ACM AC */ 3439 for (non_acm_ac = ac + 1; 3440 non_acm_ac < IEEE80211_NUM_ACS; 3441 non_acm_ac++) 3442 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3443 break; 3444 /* Usually the loop will result in using BK even if it 3445 * requires admission control, but such a configuration 3446 * makes no sense and we have to transmit somehow - the 3447 * AC selection does the same thing. 3448 * If we started out trying to downgrade from BK, then 3449 * the extra condition here might be needed. 3450 */ 3451 if (non_acm_ac >= IEEE80211_NUM_ACS) 3452 non_acm_ac = IEEE80211_AC_BK; 3453 if (drv_conf_tx(local, &sdata->deflink, ac, 3454 &sdata->deflink.tx_conf[non_acm_ac])) 3455 link_err(&sdata->deflink, 3456 "failed to set TX queue parameters for queue %d\n", 3457 ac); 3458 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3459 ret = true; 3460 wiphy_delayed_work_queue(local->hw.wiphy, 3461 &ifmgd->tx_tspec_wk, 3462 tx_tspec->time_slice_start + 3463 HZ - now + 1); 3464 break; 3465 case TX_TSPEC_ACTION_NONE: 3466 /* nothing now */ 3467 break; 3468 } 3469 } 3470 3471 return ret; 3472 } 3473 3474 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3475 { 3476 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3477 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3478 BSS_CHANGED_QOS); 3479 } 3480 3481 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3482 struct wiphy_work *work) 3483 { 3484 struct ieee80211_sub_if_data *sdata; 3485 3486 sdata = container_of(work, struct ieee80211_sub_if_data, 3487 u.mgd.tx_tspec_wk.work); 3488 ieee80211_sta_handle_tspec_ac_params(sdata); 3489 } 3490 3491 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3492 { 3493 struct ieee80211_sub_if_data *sdata = link->sdata; 3494 struct ieee80211_local *local = sdata->local; 3495 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3496 struct ieee80211_tx_queue_params *params = link->tx_conf; 3497 u8 ac; 3498 3499 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3500 mlme_dbg(sdata, 3501 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3502 ac, params[ac].acm, 3503 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3504 params[ac].txop, params[ac].uapsd, 3505 ifmgd->tx_tspec[ac].downgraded); 3506 if (!ifmgd->tx_tspec[ac].downgraded && 3507 drv_conf_tx(local, link, ac, ¶ms[ac])) 3508 link_err(link, 3509 "failed to set TX queue parameters for AC %d\n", 3510 ac); 3511 } 3512 } 3513 3514 /* MLME */ 3515 static bool 3516 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3517 struct ieee80211_link_data *link, 3518 const u8 *wmm_param, size_t wmm_param_len, 3519 const struct ieee80211_mu_edca_param_set *mu_edca) 3520 { 3521 struct ieee80211_sub_if_data *sdata = link->sdata; 3522 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3524 size_t left; 3525 int count, mu_edca_count, ac; 3526 const u8 *pos; 3527 u8 uapsd_queues = 0; 3528 3529 if (!local->ops->conf_tx) 3530 return false; 3531 3532 if (local->hw.queues < IEEE80211_NUM_ACS) 3533 return false; 3534 3535 if (!wmm_param) 3536 return false; 3537 3538 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3539 return false; 3540 3541 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3542 uapsd_queues = ifmgd->uapsd_queues; 3543 3544 count = wmm_param[6] & 0x0f; 3545 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3546 * if mu_edca was preset before and now it disappeared tell 3547 * the driver about it. 3548 */ 3549 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3550 if (count == link->u.mgd.wmm_last_param_set && 3551 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3552 return false; 3553 link->u.mgd.wmm_last_param_set = count; 3554 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3555 3556 pos = wmm_param + 8; 3557 left = wmm_param_len - 8; 3558 3559 memset(¶ms, 0, sizeof(params)); 3560 3561 sdata->wmm_acm = 0; 3562 for (; left >= 4; left -= 4, pos += 4) { 3563 int aci = (pos[0] >> 5) & 0x03; 3564 int acm = (pos[0] >> 4) & 0x01; 3565 bool uapsd = false; 3566 3567 switch (aci) { 3568 case 1: /* AC_BK */ 3569 ac = IEEE80211_AC_BK; 3570 if (acm) 3571 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3572 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3573 uapsd = true; 3574 params[ac].mu_edca = !!mu_edca; 3575 if (mu_edca) 3576 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3577 break; 3578 case 2: /* AC_VI */ 3579 ac = IEEE80211_AC_VI; 3580 if (acm) 3581 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3582 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3583 uapsd = true; 3584 params[ac].mu_edca = !!mu_edca; 3585 if (mu_edca) 3586 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3587 break; 3588 case 3: /* AC_VO */ 3589 ac = IEEE80211_AC_VO; 3590 if (acm) 3591 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3592 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3593 uapsd = true; 3594 params[ac].mu_edca = !!mu_edca; 3595 if (mu_edca) 3596 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3597 break; 3598 case 0: /* AC_BE */ 3599 default: 3600 ac = IEEE80211_AC_BE; 3601 if (acm) 3602 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3603 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3604 uapsd = true; 3605 params[ac].mu_edca = !!mu_edca; 3606 if (mu_edca) 3607 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3608 break; 3609 } 3610 3611 params[ac].aifs = pos[0] & 0x0f; 3612 3613 if (params[ac].aifs < 2) { 3614 link_info(link, 3615 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3616 params[ac].aifs, aci); 3617 params[ac].aifs = 2; 3618 } 3619 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3620 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3621 params[ac].txop = get_unaligned_le16(pos + 2); 3622 params[ac].acm = acm; 3623 params[ac].uapsd = uapsd; 3624 3625 if (params[ac].cw_min == 0 || 3626 params[ac].cw_min > params[ac].cw_max) { 3627 link_info(link, 3628 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3629 params[ac].cw_min, params[ac].cw_max, aci); 3630 return false; 3631 } 3632 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3633 } 3634 3635 /* WMM specification requires all 4 ACIs. */ 3636 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3637 if (params[ac].cw_min == 0) { 3638 link_info(link, 3639 "AP has invalid WMM params (missing AC %d), using defaults\n", 3640 ac); 3641 return false; 3642 } 3643 } 3644 3645 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3646 link->tx_conf[ac] = params[ac]; 3647 3648 return true; 3649 } 3650 3651 static bool 3652 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3653 struct ieee80211_link_data *link, 3654 const u8 *wmm_param, size_t wmm_param_len, 3655 const struct ieee80211_mu_edca_param_set *mu_edca) 3656 { 3657 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3658 mu_edca)) 3659 return false; 3660 3661 ieee80211_mgd_set_link_qos_params(link); 3662 3663 /* enable WMM or activate new settings */ 3664 link->conf->qos = true; 3665 return true; 3666 } 3667 3668 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3669 { 3670 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3671 3672 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3673 ieee80211_run_deferred_scan(sdata->local); 3674 } 3675 3676 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3677 { 3678 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3679 3680 __ieee80211_stop_poll(sdata); 3681 } 3682 3683 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3684 u16 capab, bool erp_valid, u8 erp) 3685 { 3686 struct ieee80211_bss_conf *bss_conf = link->conf; 3687 struct ieee80211_supported_band *sband; 3688 u64 changed = 0; 3689 bool use_protection; 3690 bool use_short_preamble; 3691 bool use_short_slot; 3692 3693 sband = ieee80211_get_link_sband(link); 3694 if (!sband) 3695 return changed; 3696 3697 if (erp_valid) { 3698 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3699 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3700 } else { 3701 use_protection = false; 3702 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3703 } 3704 3705 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3706 if (sband->band == NL80211_BAND_5GHZ || 3707 sband->band == NL80211_BAND_6GHZ) 3708 use_short_slot = true; 3709 3710 if (use_protection != bss_conf->use_cts_prot) { 3711 bss_conf->use_cts_prot = use_protection; 3712 changed |= BSS_CHANGED_ERP_CTS_PROT; 3713 } 3714 3715 if (use_short_preamble != bss_conf->use_short_preamble) { 3716 bss_conf->use_short_preamble = use_short_preamble; 3717 changed |= BSS_CHANGED_ERP_PREAMBLE; 3718 } 3719 3720 if (use_short_slot != bss_conf->use_short_slot) { 3721 bss_conf->use_short_slot = use_short_slot; 3722 changed |= BSS_CHANGED_ERP_SLOT; 3723 } 3724 3725 return changed; 3726 } 3727 3728 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3729 struct cfg80211_bss *cbss) 3730 { 3731 struct ieee80211_sub_if_data *sdata = link->sdata; 3732 struct ieee80211_bss_conf *bss_conf = link->conf; 3733 struct ieee80211_bss *bss = (void *)cbss->priv; 3734 u64 changed = BSS_CHANGED_QOS; 3735 3736 /* not really used in MLO */ 3737 sdata->u.mgd.beacon_timeout = 3738 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3739 bss_conf->beacon_int)); 3740 3741 changed |= ieee80211_handle_bss_capability(link, 3742 bss_conf->assoc_capability, 3743 bss->has_erp_value, 3744 bss->erp_value); 3745 3746 ieee80211_check_rate_mask(link); 3747 3748 link->conf->bss = cbss; 3749 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3750 3751 if (sdata->vif.p2p || 3752 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3753 const struct cfg80211_bss_ies *ies; 3754 3755 rcu_read_lock(); 3756 ies = rcu_dereference(cbss->ies); 3757 if (ies) { 3758 int ret; 3759 3760 ret = cfg80211_get_p2p_attr( 3761 ies->data, ies->len, 3762 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3763 (u8 *) &bss_conf->p2p_noa_attr, 3764 sizeof(bss_conf->p2p_noa_attr)); 3765 if (ret >= 2) { 3766 link->u.mgd.p2p_noa_index = 3767 bss_conf->p2p_noa_attr.index; 3768 changed |= BSS_CHANGED_P2P_PS; 3769 } 3770 } 3771 rcu_read_unlock(); 3772 } 3773 3774 if (link->u.mgd.have_beacon) { 3775 bss_conf->beacon_rate = bss->beacon_rate; 3776 changed |= BSS_CHANGED_BEACON_INFO; 3777 } else { 3778 bss_conf->beacon_rate = NULL; 3779 } 3780 3781 /* Tell the driver to monitor connection quality (if supported) */ 3782 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3783 bss_conf->cqm_rssi_thold) 3784 changed |= BSS_CHANGED_CQM; 3785 3786 return changed; 3787 } 3788 3789 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3790 struct ieee80211_mgd_assoc_data *assoc_data, 3791 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3792 { 3793 struct ieee80211_local *local = sdata->local; 3794 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3795 u64 vif_changed = BSS_CHANGED_ASSOC; 3796 unsigned int link_id; 3797 3798 lockdep_assert_wiphy(local->hw.wiphy); 3799 3800 sdata->u.mgd.associated = true; 3801 3802 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3803 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3804 struct ieee80211_link_data *link; 3805 3806 if (!cbss || 3807 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3808 continue; 3809 3810 if (ieee80211_vif_is_mld(&sdata->vif) && 3811 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3812 continue; 3813 3814 link = sdata_dereference(sdata->link[link_id], sdata); 3815 if (WARN_ON(!link)) 3816 return; 3817 3818 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3819 } 3820 3821 /* just to be sure */ 3822 ieee80211_stop_poll(sdata); 3823 3824 ieee80211_led_assoc(local, 1); 3825 3826 vif_cfg->assoc = 1; 3827 3828 /* Enable ARP filtering */ 3829 if (vif_cfg->arp_addr_cnt) 3830 vif_changed |= BSS_CHANGED_ARP_FILTER; 3831 3832 if (ieee80211_vif_is_mld(&sdata->vif)) { 3833 for (link_id = 0; 3834 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3835 link_id++) { 3836 struct ieee80211_link_data *link; 3837 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3838 3839 if (!cbss || 3840 !(BIT(link_id) & 3841 ieee80211_vif_usable_links(&sdata->vif)) || 3842 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3843 continue; 3844 3845 link = sdata_dereference(sdata->link[link_id], sdata); 3846 if (WARN_ON(!link)) 3847 return; 3848 3849 ieee80211_link_info_change_notify(sdata, link, 3850 changed[link_id]); 3851 3852 ieee80211_recalc_smps(sdata, link); 3853 } 3854 3855 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3856 } else { 3857 ieee80211_bss_info_change_notify(sdata, 3858 vif_changed | changed[0]); 3859 } 3860 3861 ieee80211_recalc_ps(local); 3862 3863 /* leave this here to not change ordering in non-MLO cases */ 3864 if (!ieee80211_vif_is_mld(&sdata->vif)) 3865 ieee80211_recalc_smps(sdata, &sdata->deflink); 3866 ieee80211_recalc_ps_vif(sdata); 3867 3868 netif_carrier_on(sdata->dev); 3869 } 3870 3871 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3872 { 3873 struct ieee80211_mgd_assoc_data *add_links_data = 3874 sdata->u.mgd.reconf.add_links_data; 3875 3876 if (!ieee80211_vif_is_mld(&sdata->vif) || 3877 !(sdata->u.mgd.reconf.added_links | 3878 sdata->u.mgd.reconf.removed_links)) 3879 return; 3880 3881 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3882 &sdata->u.mgd.reconf.wk); 3883 sdata->u.mgd.reconf.added_links = 0; 3884 sdata->u.mgd.reconf.removed_links = 0; 3885 sdata->u.mgd.reconf.dialog_token = 0; 3886 3887 if (add_links_data) { 3888 struct cfg80211_mlo_reconf_done_data done_data = {}; 3889 u8 link_id; 3890 3891 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3892 link_id++) 3893 done_data.links[link_id].bss = 3894 add_links_data->link[link_id].bss; 3895 3896 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 3897 3898 kfree(sdata->u.mgd.reconf.add_links_data); 3899 sdata->u.mgd.reconf.add_links_data = NULL; 3900 } 3901 } 3902 3903 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3904 u16 stype, u16 reason, bool tx, 3905 u8 *frame_buf) 3906 { 3907 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3908 struct ieee80211_local *local = sdata->local; 3909 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3910 unsigned int link_id; 3911 u64 changed = 0; 3912 struct ieee80211_prep_tx_info info = { 3913 .subtype = stype, 3914 .was_assoc = true, 3915 .link_id = ffs(sdata->vif.active_links) - 1, 3916 }; 3917 3918 lockdep_assert_wiphy(local->hw.wiphy); 3919 3920 if (WARN_ON(!ap_sta)) 3921 return; 3922 3923 if (WARN_ON_ONCE(tx && !frame_buf)) 3924 return; 3925 3926 if (WARN_ON(!ifmgd->associated)) 3927 return; 3928 3929 ieee80211_stop_poll(sdata); 3930 3931 ifmgd->associated = false; 3932 3933 if (tx) { 3934 bool tx_link_found = false; 3935 3936 for (link_id = 0; 3937 link_id < ARRAY_SIZE(sdata->link); 3938 link_id++) { 3939 struct ieee80211_link_data *link; 3940 3941 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 3942 continue; 3943 3944 link = sdata_dereference(sdata->link[link_id], sdata); 3945 if (WARN_ON_ONCE(!link)) 3946 continue; 3947 3948 if (link->u.mgd.csa.blocked_tx) 3949 continue; 3950 3951 tx_link_found = true; 3952 break; 3953 } 3954 3955 tx = tx_link_found; 3956 } 3957 3958 /* other links will be destroyed */ 3959 sdata->deflink.conf->bss = NULL; 3960 sdata->deflink.conf->epcs_support = false; 3961 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3962 3963 netif_carrier_off(sdata->dev); 3964 3965 /* 3966 * if we want to get out of ps before disassoc (why?) we have 3967 * to do it before sending disassoc, as otherwise the null-packet 3968 * won't be valid. 3969 */ 3970 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3971 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3972 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3973 } 3974 local->ps_sdata = NULL; 3975 3976 /* disable per-vif ps */ 3977 ieee80211_recalc_ps_vif(sdata); 3978 3979 /* make sure ongoing transmission finishes */ 3980 synchronize_net(); 3981 3982 /* 3983 * drop any frame before deauth/disassoc, this can be data or 3984 * management frame. Since we are disconnecting, we should not 3985 * insist sending these frames which can take time and delay 3986 * the disconnection and possible the roaming. 3987 */ 3988 ieee80211_flush_queues(local, sdata, true); 3989 3990 if (tx) { 3991 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3992 3993 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3994 sdata->vif.cfg.ap_addr, stype, 3995 reason, true, frame_buf); 3996 3997 /* flush out frame - make sure the deauth was actually sent */ 3998 ieee80211_flush_queues(local, sdata, false); 3999 4000 drv_mgd_complete_tx(sdata->local, sdata, &info); 4001 } else if (frame_buf) { 4002 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4003 sdata->vif.cfg.ap_addr, stype, 4004 reason, false, frame_buf); 4005 } 4006 4007 /* clear AP addr only after building the needed mgmt frames */ 4008 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4009 eth_zero_addr(sdata->vif.cfg.ap_addr); 4010 4011 sdata->vif.cfg.ssid_len = 0; 4012 4013 /* Remove TDLS peers */ 4014 __sta_info_flush(sdata, false, -1, ap_sta); 4015 4016 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4017 /* Only move the AP state */ 4018 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4019 } else { 4020 /* Remove AP peer */ 4021 sta_info_flush(sdata, -1); 4022 } 4023 4024 /* finally reset all BSS / config parameters */ 4025 if (!ieee80211_vif_is_mld(&sdata->vif)) 4026 changed |= ieee80211_reset_erp_info(sdata); 4027 4028 ieee80211_led_assoc(local, 0); 4029 changed |= BSS_CHANGED_ASSOC; 4030 sdata->vif.cfg.assoc = false; 4031 4032 sdata->deflink.u.mgd.p2p_noa_index = -1; 4033 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4034 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4035 4036 /* on the next assoc, re-program HT/VHT parameters */ 4037 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4038 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4039 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4040 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4041 4042 /* 4043 * reset MU-MIMO ownership and group data in default link, 4044 * if used, other links are destroyed 4045 */ 4046 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4047 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4048 memset(sdata->vif.bss_conf.mu_group.position, 0, 4049 sizeof(sdata->vif.bss_conf.mu_group.position)); 4050 if (!ieee80211_vif_is_mld(&sdata->vif)) 4051 changed |= BSS_CHANGED_MU_GROUPS; 4052 sdata->vif.bss_conf.mu_mimo_owner = false; 4053 4054 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4055 4056 del_timer_sync(&local->dynamic_ps_timer); 4057 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4058 4059 /* Disable ARP filtering */ 4060 if (sdata->vif.cfg.arp_addr_cnt) 4061 changed |= BSS_CHANGED_ARP_FILTER; 4062 4063 sdata->vif.bss_conf.qos = false; 4064 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4065 changed |= BSS_CHANGED_QOS; 4066 /* The BSSID (not really interesting) and HT changed */ 4067 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4068 ieee80211_bss_info_change_notify(sdata, changed); 4069 } else { 4070 ieee80211_vif_cfg_change_notify(sdata, changed); 4071 } 4072 4073 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4074 /* 4075 * After notifying the driver about the disassoc, 4076 * remove the ap sta. 4077 */ 4078 sta_info_flush(sdata, -1); 4079 } 4080 4081 /* disassociated - set to defaults now */ 4082 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4083 4084 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 4085 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 4086 del_timer_sync(&sdata->u.mgd.timer); 4087 4088 sdata->vif.bss_conf.dtim_period = 0; 4089 sdata->vif.bss_conf.beacon_rate = NULL; 4090 4091 sdata->deflink.u.mgd.have_beacon = false; 4092 sdata->deflink.u.mgd.tracking_signal_avg = false; 4093 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4094 4095 ifmgd->flags = 0; 4096 4097 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4098 struct ieee80211_link_data *link; 4099 4100 link = sdata_dereference(sdata->link[link_id], sdata); 4101 if (!link) 4102 continue; 4103 ieee80211_link_release_channel(link); 4104 } 4105 4106 sdata->vif.bss_conf.csa_active = false; 4107 sdata->deflink.u.mgd.csa.blocked_tx = false; 4108 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4109 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4110 ieee80211_vif_unblock_queues_csa(sdata); 4111 4112 /* existing TX TSPEC sessions no longer exist */ 4113 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4114 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4115 4116 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4117 sdata->vif.bss_conf.pwr_reduction = 0; 4118 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4119 4120 sdata->vif.cfg.eml_cap = 0; 4121 sdata->vif.cfg.eml_med_sync_delay = 0; 4122 sdata->vif.cfg.mld_capa_op = 0; 4123 4124 memset(&sdata->u.mgd.ttlm_info, 0, 4125 sizeof(sdata->u.mgd.ttlm_info)); 4126 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4127 4128 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4129 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4130 &ifmgd->neg_ttlm_timeout_work); 4131 4132 sdata->u.mgd.removed_links = 0; 4133 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4134 &sdata->u.mgd.ml_reconf_work); 4135 4136 wiphy_work_cancel(sdata->local->hw.wiphy, 4137 &ifmgd->teardown_ttlm_work); 4138 4139 ieee80211_vif_set_links(sdata, 0, 0); 4140 4141 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4142 4143 /* if disconnection happens in the middle of the ML reconfiguration 4144 * flow, cfg80211 must called to release the BSS references obtained 4145 * when the flow started. 4146 */ 4147 ieee80211_ml_reconf_reset(sdata); 4148 4149 ifmgd->epcs.enabled = false; 4150 ifmgd->epcs.dialog_token = 0; 4151 } 4152 4153 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4154 { 4155 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4156 struct ieee80211_local *local = sdata->local; 4157 4158 lockdep_assert_wiphy(local->hw.wiphy); 4159 4160 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4161 return; 4162 4163 __ieee80211_stop_poll(sdata); 4164 4165 ieee80211_recalc_ps(local); 4166 4167 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4168 return; 4169 4170 /* 4171 * We've received a probe response, but are not sure whether 4172 * we have or will be receiving any beacons or data, so let's 4173 * schedule the timers again, just in case. 4174 */ 4175 ieee80211_sta_reset_beacon_monitor(sdata); 4176 4177 mod_timer(&ifmgd->conn_mon_timer, 4178 round_jiffies_up(jiffies + 4179 IEEE80211_CONNECTION_IDLE_TIME)); 4180 } 4181 4182 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4183 struct ieee80211_hdr *hdr, 4184 u16 tx_time) 4185 { 4186 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4187 u16 tid; 4188 int ac; 4189 struct ieee80211_sta_tx_tspec *tx_tspec; 4190 unsigned long now = jiffies; 4191 4192 if (!ieee80211_is_data_qos(hdr->frame_control)) 4193 return; 4194 4195 tid = ieee80211_get_tid(hdr); 4196 ac = ieee80211_ac_from_tid(tid); 4197 tx_tspec = &ifmgd->tx_tspec[ac]; 4198 4199 if (likely(!tx_tspec->admitted_time)) 4200 return; 4201 4202 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4203 tx_tspec->consumed_tx_time = 0; 4204 tx_tspec->time_slice_start = now; 4205 4206 if (tx_tspec->downgraded) { 4207 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4208 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4209 &ifmgd->tx_tspec_wk, 0); 4210 } 4211 } 4212 4213 if (tx_tspec->downgraded) 4214 return; 4215 4216 tx_tspec->consumed_tx_time += tx_time; 4217 4218 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4219 tx_tspec->downgraded = true; 4220 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4221 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4222 &ifmgd->tx_tspec_wk, 0); 4223 } 4224 } 4225 4226 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4227 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4228 { 4229 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4230 4231 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4232 !sdata->u.mgd.probe_send_count) 4233 return; 4234 4235 if (ack) 4236 sdata->u.mgd.probe_send_count = 0; 4237 else 4238 sdata->u.mgd.nullfunc_failed = true; 4239 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4240 } 4241 4242 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4243 const u8 *src, const u8 *dst, 4244 const u8 *ssid, size_t ssid_len, 4245 struct ieee80211_channel *channel) 4246 { 4247 struct sk_buff *skb; 4248 4249 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4250 ssid, ssid_len, NULL, 0, 4251 IEEE80211_PROBE_FLAG_DIRECTED); 4252 if (skb) 4253 ieee80211_tx_skb(sdata, skb); 4254 } 4255 4256 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4257 { 4258 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4259 u8 *dst = sdata->vif.cfg.ap_addr; 4260 u8 unicast_limit = max(1, max_probe_tries - 3); 4261 struct sta_info *sta; 4262 4263 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4264 4265 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 4266 return; 4267 4268 /* 4269 * Try sending broadcast probe requests for the last three 4270 * probe requests after the first ones failed since some 4271 * buggy APs only support broadcast probe requests. 4272 */ 4273 if (ifmgd->probe_send_count >= unicast_limit) 4274 dst = NULL; 4275 4276 /* 4277 * When the hardware reports an accurate Tx ACK status, it's 4278 * better to send a nullfunc frame instead of a probe request, 4279 * as it will kick us off the AP quickly if we aren't associated 4280 * anymore. The timeout will be reset if the frame is ACKed by 4281 * the AP. 4282 */ 4283 ifmgd->probe_send_count++; 4284 4285 if (dst) { 4286 sta = sta_info_get(sdata, dst); 4287 if (!WARN_ON(!sta)) 4288 ieee80211_check_fast_rx(sta); 4289 } 4290 4291 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4292 ifmgd->nullfunc_failed = false; 4293 ieee80211_send_nullfunc(sdata->local, sdata, false); 4294 } else { 4295 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4296 sdata->vif.cfg.ssid, 4297 sdata->vif.cfg.ssid_len, 4298 sdata->deflink.conf->bss->channel); 4299 } 4300 4301 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4302 run_again(sdata, ifmgd->probe_timeout); 4303 } 4304 4305 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4306 bool beacon) 4307 { 4308 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4309 bool already = false; 4310 4311 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4312 4313 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 4314 return; 4315 4316 if (!ieee80211_sdata_running(sdata)) 4317 return; 4318 4319 if (!ifmgd->associated) 4320 return; 4321 4322 if (sdata->local->tmp_channel || sdata->local->scanning) 4323 return; 4324 4325 if (sdata->local->suspending) { 4326 /* reschedule after resume */ 4327 ieee80211_reset_ap_probe(sdata); 4328 return; 4329 } 4330 4331 if (beacon) { 4332 mlme_dbg_ratelimited(sdata, 4333 "detected beacon loss from AP (missed %d beacons) - probing\n", 4334 beacon_loss_count); 4335 4336 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4337 } 4338 4339 /* 4340 * The driver/our work has already reported this event or the 4341 * connection monitoring has kicked in and we have already sent 4342 * a probe request. Or maybe the AP died and the driver keeps 4343 * reporting until we disassociate... 4344 * 4345 * In either case we have to ignore the current call to this 4346 * function (except for setting the correct probe reason bit) 4347 * because otherwise we would reset the timer every time and 4348 * never check whether we received a probe response! 4349 */ 4350 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4351 already = true; 4352 4353 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4354 4355 if (already) 4356 return; 4357 4358 ieee80211_recalc_ps(sdata->local); 4359 4360 ifmgd->probe_send_count = 0; 4361 ieee80211_mgd_probe_ap_send(sdata); 4362 } 4363 4364 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4365 struct ieee80211_vif *vif) 4366 { 4367 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4368 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4369 struct cfg80211_bss *cbss; 4370 struct sk_buff *skb; 4371 const struct element *ssid; 4372 int ssid_len; 4373 4374 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4375 4376 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4377 ieee80211_vif_is_mld(&sdata->vif))) 4378 return NULL; 4379 4380 if (ifmgd->associated) 4381 cbss = sdata->deflink.conf->bss; 4382 else if (ifmgd->auth_data) 4383 cbss = ifmgd->auth_data->bss; 4384 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4385 cbss = ifmgd->assoc_data->link[0].bss; 4386 else 4387 return NULL; 4388 4389 rcu_read_lock(); 4390 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4391 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4392 "invalid SSID element (len=%d)", 4393 ssid ? ssid->datalen : -1)) 4394 ssid_len = 0; 4395 else 4396 ssid_len = ssid->datalen; 4397 4398 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4399 (u32) -1, cbss->channel, 4400 ssid->data, ssid_len, 4401 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4402 rcu_read_unlock(); 4403 4404 return skb; 4405 } 4406 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4407 4408 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4409 const u8 *buf, size_t len, bool tx, 4410 u16 reason, bool reconnect) 4411 { 4412 struct ieee80211_event event = { 4413 .type = MLME_EVENT, 4414 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4415 .u.mlme.reason = reason, 4416 }; 4417 4418 if (tx) 4419 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4420 else 4421 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4422 4423 drv_event_callback(sdata->local, sdata, &event); 4424 } 4425 4426 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4427 { 4428 struct ieee80211_local *local = sdata->local; 4429 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4430 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4431 4432 lockdep_assert_wiphy(local->hw.wiphy); 4433 4434 if (!ifmgd->associated) 4435 return; 4436 4437 if (!ifmgd->driver_disconnect) { 4438 unsigned int link_id; 4439 4440 /* 4441 * AP is probably out of range (or not reachable for another 4442 * reason) so remove the bss structs for that AP. In the case 4443 * of multi-link, it's not clear that all of them really are 4444 * out of range, but if they weren't the driver likely would 4445 * have switched to just have a single link active? 4446 */ 4447 for (link_id = 0; 4448 link_id < ARRAY_SIZE(sdata->link); 4449 link_id++) { 4450 struct ieee80211_link_data *link; 4451 4452 link = sdata_dereference(sdata->link[link_id], sdata); 4453 if (!link) 4454 continue; 4455 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4456 link->conf->bss = NULL; 4457 } 4458 } 4459 4460 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4461 ifmgd->driver_disconnect ? 4462 WLAN_REASON_DEAUTH_LEAVING : 4463 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4464 true, frame_buf); 4465 /* the other links will be destroyed */ 4466 sdata->vif.bss_conf.csa_active = false; 4467 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4468 sdata->deflink.u.mgd.csa.blocked_tx = false; 4469 ieee80211_vif_unblock_queues_csa(sdata); 4470 4471 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4472 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4473 ifmgd->reconnect); 4474 ifmgd->reconnect = false; 4475 } 4476 4477 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4478 struct wiphy_work *work) 4479 { 4480 struct ieee80211_sub_if_data *sdata = 4481 container_of(work, struct ieee80211_sub_if_data, 4482 u.mgd.beacon_connection_loss_work); 4483 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4484 4485 if (ifmgd->connection_loss) { 4486 sdata_info(sdata, "Connection to AP %pM lost\n", 4487 sdata->vif.cfg.ap_addr); 4488 __ieee80211_disconnect(sdata); 4489 ifmgd->connection_loss = false; 4490 } else if (ifmgd->driver_disconnect) { 4491 sdata_info(sdata, 4492 "Driver requested disconnection from AP %pM\n", 4493 sdata->vif.cfg.ap_addr); 4494 __ieee80211_disconnect(sdata); 4495 ifmgd->driver_disconnect = false; 4496 } else { 4497 if (ifmgd->associated) 4498 sdata->deflink.u.mgd.beacon_loss_count++; 4499 ieee80211_mgd_probe_ap(sdata, true); 4500 } 4501 } 4502 4503 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4504 struct wiphy_work *work) 4505 { 4506 struct ieee80211_sub_if_data *sdata = 4507 container_of(work, struct ieee80211_sub_if_data, 4508 u.mgd.csa_connection_drop_work); 4509 4510 __ieee80211_disconnect(sdata); 4511 } 4512 4513 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4514 { 4515 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4516 struct ieee80211_hw *hw = &sdata->local->hw; 4517 4518 trace_api_beacon_loss(sdata); 4519 4520 sdata->u.mgd.connection_loss = false; 4521 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4522 } 4523 EXPORT_SYMBOL(ieee80211_beacon_loss); 4524 4525 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4526 { 4527 struct ieee80211_sub_if_data *sdata; 4528 struct ieee80211_hw *hw; 4529 4530 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4531 4532 sdata = vif_to_sdata(vif); 4533 hw = &sdata->local->hw; 4534 4535 trace_api_connection_loss(sdata); 4536 4537 sdata->u.mgd.connection_loss = true; 4538 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4539 } 4540 EXPORT_SYMBOL(ieee80211_connection_loss); 4541 4542 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4543 { 4544 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4545 struct ieee80211_hw *hw = &sdata->local->hw; 4546 4547 trace_api_disconnect(sdata, reconnect); 4548 4549 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4550 return; 4551 4552 sdata->u.mgd.driver_disconnect = true; 4553 sdata->u.mgd.reconnect = reconnect; 4554 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4555 } 4556 EXPORT_SYMBOL(ieee80211_disconnect); 4557 4558 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4559 bool assoc) 4560 { 4561 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4562 4563 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4564 4565 sdata->u.mgd.auth_data = NULL; 4566 4567 if (!assoc) { 4568 /* 4569 * we are not authenticated yet, the only timer that could be 4570 * running is the timeout for the authentication response which 4571 * which is not relevant anymore. 4572 */ 4573 del_timer_sync(&sdata->u.mgd.timer); 4574 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4575 4576 /* other links are destroyed */ 4577 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4578 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4579 BSS_CHANGED_BSSID); 4580 sdata->u.mgd.flags = 0; 4581 4582 ieee80211_link_release_channel(&sdata->deflink); 4583 ieee80211_vif_set_links(sdata, 0, 0); 4584 } 4585 4586 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4587 kfree(auth_data); 4588 } 4589 4590 enum assoc_status { 4591 ASSOC_SUCCESS, 4592 ASSOC_REJECTED, 4593 ASSOC_TIMEOUT, 4594 ASSOC_ABANDON, 4595 }; 4596 4597 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4598 enum assoc_status status) 4599 { 4600 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4601 4602 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4603 4604 sdata->u.mgd.assoc_data = NULL; 4605 4606 if (status != ASSOC_SUCCESS) { 4607 /* 4608 * we are not associated yet, the only timer that could be 4609 * running is the timeout for the association response which 4610 * which is not relevant anymore. 4611 */ 4612 del_timer_sync(&sdata->u.mgd.timer); 4613 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4614 4615 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4616 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4617 BSS_CHANGED_BSSID); 4618 sdata->u.mgd.flags = 0; 4619 sdata->vif.bss_conf.mu_mimo_owner = false; 4620 4621 if (status != ASSOC_REJECTED) { 4622 struct cfg80211_assoc_failure data = { 4623 .timeout = status == ASSOC_TIMEOUT, 4624 }; 4625 int i; 4626 4627 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4628 ARRAY_SIZE(assoc_data->link)); 4629 4630 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4631 data.bss[i] = assoc_data->link[i].bss; 4632 4633 if (ieee80211_vif_is_mld(&sdata->vif)) 4634 data.ap_mld_addr = assoc_data->ap_addr; 4635 4636 cfg80211_assoc_failure(sdata->dev, &data); 4637 } 4638 4639 ieee80211_link_release_channel(&sdata->deflink); 4640 ieee80211_vif_set_links(sdata, 0, 0); 4641 } 4642 4643 kfree(assoc_data); 4644 } 4645 4646 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4647 struct ieee80211_mgmt *mgmt, size_t len) 4648 { 4649 struct ieee80211_local *local = sdata->local; 4650 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4651 const struct element *challenge; 4652 u8 *pos; 4653 u32 tx_flags = 0; 4654 struct ieee80211_prep_tx_info info = { 4655 .subtype = IEEE80211_STYPE_AUTH, 4656 .link_id = auth_data->link_id, 4657 }; 4658 4659 pos = mgmt->u.auth.variable; 4660 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4661 len - (pos - (u8 *)mgmt)); 4662 if (!challenge) 4663 return; 4664 auth_data->expected_transaction = 4; 4665 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4666 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4667 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4668 IEEE80211_TX_INTFL_MLME_CONN_TX; 4669 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4670 (void *)challenge, 4671 challenge->datalen + sizeof(*challenge), 4672 auth_data->ap_addr, auth_data->ap_addr, 4673 auth_data->key, auth_data->key_len, 4674 auth_data->key_idx, tx_flags); 4675 } 4676 4677 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4678 { 4679 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4680 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4681 struct sta_info *sta; 4682 4683 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4684 4685 sdata_info(sdata, "authenticated\n"); 4686 ifmgd->auth_data->done = true; 4687 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4688 ifmgd->auth_data->timeout_started = true; 4689 run_again(sdata, ifmgd->auth_data->timeout); 4690 4691 /* move station state to auth */ 4692 sta = sta_info_get(sdata, ap_addr); 4693 if (!sta) { 4694 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4695 return false; 4696 } 4697 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4698 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4699 return false; 4700 } 4701 4702 return true; 4703 } 4704 4705 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4706 struct ieee80211_mgmt *mgmt, size_t len) 4707 { 4708 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4709 u16 auth_alg, auth_transaction, status_code; 4710 struct ieee80211_event event = { 4711 .type = MLME_EVENT, 4712 .u.mlme.data = AUTH_EVENT, 4713 }; 4714 struct ieee80211_prep_tx_info info = { 4715 .subtype = IEEE80211_STYPE_AUTH, 4716 }; 4717 4718 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4719 4720 if (len < 24 + 6) 4721 return; 4722 4723 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4724 return; 4725 4726 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4727 return; 4728 4729 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4730 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4731 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4732 4733 info.link_id = ifmgd->auth_data->link_id; 4734 4735 if (auth_alg != ifmgd->auth_data->algorithm || 4736 (auth_alg != WLAN_AUTH_SAE && 4737 auth_transaction != ifmgd->auth_data->expected_transaction) || 4738 (auth_alg == WLAN_AUTH_SAE && 4739 (auth_transaction < ifmgd->auth_data->expected_transaction || 4740 auth_transaction > 2))) { 4741 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4742 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4743 auth_transaction, 4744 ifmgd->auth_data->expected_transaction); 4745 goto notify_driver; 4746 } 4747 4748 if (status_code != WLAN_STATUS_SUCCESS) { 4749 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4750 4751 if (auth_alg == WLAN_AUTH_SAE && 4752 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4753 (auth_transaction == 1 && 4754 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4755 status_code == WLAN_STATUS_SAE_PK)))) { 4756 /* waiting for userspace now */ 4757 ifmgd->auth_data->waiting = true; 4758 ifmgd->auth_data->timeout = 4759 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4760 ifmgd->auth_data->timeout_started = true; 4761 run_again(sdata, ifmgd->auth_data->timeout); 4762 goto notify_driver; 4763 } 4764 4765 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4766 mgmt->sa, status_code); 4767 ieee80211_destroy_auth_data(sdata, false); 4768 event.u.mlme.status = MLME_DENIED; 4769 event.u.mlme.reason = status_code; 4770 drv_event_callback(sdata->local, sdata, &event); 4771 goto notify_driver; 4772 } 4773 4774 switch (ifmgd->auth_data->algorithm) { 4775 case WLAN_AUTH_OPEN: 4776 case WLAN_AUTH_LEAP: 4777 case WLAN_AUTH_FT: 4778 case WLAN_AUTH_SAE: 4779 case WLAN_AUTH_FILS_SK: 4780 case WLAN_AUTH_FILS_SK_PFS: 4781 case WLAN_AUTH_FILS_PK: 4782 break; 4783 case WLAN_AUTH_SHARED_KEY: 4784 if (ifmgd->auth_data->expected_transaction != 4) { 4785 ieee80211_auth_challenge(sdata, mgmt, len); 4786 /* need another frame */ 4787 return; 4788 } 4789 break; 4790 default: 4791 WARN_ONCE(1, "invalid auth alg %d", 4792 ifmgd->auth_data->algorithm); 4793 goto notify_driver; 4794 } 4795 4796 event.u.mlme.status = MLME_SUCCESS; 4797 info.success = 1; 4798 drv_event_callback(sdata->local, sdata, &event); 4799 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4800 (auth_transaction == 2 && 4801 ifmgd->auth_data->expected_transaction == 2)) { 4802 if (!ieee80211_mark_sta_auth(sdata)) 4803 return; /* ignore frame -- wait for timeout */ 4804 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4805 auth_transaction == 2) { 4806 sdata_info(sdata, "SAE peer confirmed\n"); 4807 ifmgd->auth_data->peer_confirmed = true; 4808 } 4809 4810 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4811 notify_driver: 4812 drv_mgd_complete_tx(sdata->local, sdata, &info); 4813 } 4814 4815 #define case_WLAN(type) \ 4816 case WLAN_REASON_##type: return #type 4817 4818 const char *ieee80211_get_reason_code_string(u16 reason_code) 4819 { 4820 switch (reason_code) { 4821 case_WLAN(UNSPECIFIED); 4822 case_WLAN(PREV_AUTH_NOT_VALID); 4823 case_WLAN(DEAUTH_LEAVING); 4824 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4825 case_WLAN(DISASSOC_AP_BUSY); 4826 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4827 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4828 case_WLAN(DISASSOC_STA_HAS_LEFT); 4829 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4830 case_WLAN(DISASSOC_BAD_POWER); 4831 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4832 case_WLAN(INVALID_IE); 4833 case_WLAN(MIC_FAILURE); 4834 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4835 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4836 case_WLAN(IE_DIFFERENT); 4837 case_WLAN(INVALID_GROUP_CIPHER); 4838 case_WLAN(INVALID_PAIRWISE_CIPHER); 4839 case_WLAN(INVALID_AKMP); 4840 case_WLAN(UNSUPP_RSN_VERSION); 4841 case_WLAN(INVALID_RSN_IE_CAP); 4842 case_WLAN(IEEE8021X_FAILED); 4843 case_WLAN(CIPHER_SUITE_REJECTED); 4844 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4845 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4846 case_WLAN(DISASSOC_LOW_ACK); 4847 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4848 case_WLAN(QSTA_LEAVE_QBSS); 4849 case_WLAN(QSTA_NOT_USE); 4850 case_WLAN(QSTA_REQUIRE_SETUP); 4851 case_WLAN(QSTA_TIMEOUT); 4852 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4853 case_WLAN(MESH_PEER_CANCELED); 4854 case_WLAN(MESH_MAX_PEERS); 4855 case_WLAN(MESH_CONFIG); 4856 case_WLAN(MESH_CLOSE); 4857 case_WLAN(MESH_MAX_RETRIES); 4858 case_WLAN(MESH_CONFIRM_TIMEOUT); 4859 case_WLAN(MESH_INVALID_GTK); 4860 case_WLAN(MESH_INCONSISTENT_PARAM); 4861 case_WLAN(MESH_INVALID_SECURITY); 4862 case_WLAN(MESH_PATH_ERROR); 4863 case_WLAN(MESH_PATH_NOFORWARD); 4864 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4865 case_WLAN(MAC_EXISTS_IN_MBSS); 4866 case_WLAN(MESH_CHAN_REGULATORY); 4867 case_WLAN(MESH_CHAN); 4868 default: return "<unknown>"; 4869 } 4870 } 4871 4872 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4873 struct ieee80211_mgmt *mgmt, size_t len) 4874 { 4875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4876 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4877 4878 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4879 4880 if (len < 24 + 2) 4881 return; 4882 4883 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4884 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4885 return; 4886 } 4887 4888 if (ifmgd->associated && 4889 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4890 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4891 sdata->vif.cfg.ap_addr, reason_code, 4892 ieee80211_get_reason_code_string(reason_code)); 4893 4894 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4895 4896 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4897 reason_code, false); 4898 return; 4899 } 4900 4901 if (ifmgd->assoc_data && 4902 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4903 sdata_info(sdata, 4904 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4905 ifmgd->assoc_data->ap_addr, reason_code, 4906 ieee80211_get_reason_code_string(reason_code)); 4907 4908 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4909 4910 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4911 return; 4912 } 4913 } 4914 4915 4916 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4917 struct ieee80211_mgmt *mgmt, size_t len) 4918 { 4919 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4920 u16 reason_code; 4921 4922 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4923 4924 if (len < 24 + 2) 4925 return; 4926 4927 if (!ifmgd->associated || 4928 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4929 return; 4930 4931 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4932 4933 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4934 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4935 return; 4936 } 4937 4938 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4939 sdata->vif.cfg.ap_addr, reason_code, 4940 ieee80211_get_reason_code_string(reason_code)); 4941 4942 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4943 4944 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4945 false); 4946 } 4947 4948 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4949 struct ieee80211_supported_band *sband, 4950 const struct link_sta_info *link_sta, 4951 const struct ieee802_11_elems *elems) 4952 { 4953 const struct ieee80211_sta_he_cap *own_he_cap = 4954 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4955 4956 if (elems->ext_capab_len < 10) 4957 return false; 4958 4959 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4960 return false; 4961 4962 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4963 IEEE80211_HE_MAC_CAP0_TWT_RES && 4964 own_he_cap && 4965 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4966 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4967 } 4968 4969 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4970 struct ieee80211_supported_band *sband, 4971 struct ieee80211_link_data *link, 4972 struct link_sta_info *link_sta, 4973 struct ieee802_11_elems *elems) 4974 { 4975 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4976 4977 if (link->conf->twt_requester != twt) { 4978 link->conf->twt_requester = twt; 4979 return BSS_CHANGED_TWT; 4980 } 4981 return 0; 4982 } 4983 4984 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4985 struct ieee80211_bss_conf *bss_conf, 4986 struct ieee80211_supported_band *sband, 4987 struct link_sta_info *link_sta) 4988 { 4989 const struct ieee80211_sta_he_cap *own_he_cap = 4990 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4991 4992 return bss_conf->he_support && 4993 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4994 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4995 own_he_cap && 4996 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4997 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4998 } 4999 5000 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5001 bool enabled) 5002 { 5003 /* in any case this is called, dialog token should be reset */ 5004 sdata->u.mgd.epcs.dialog_token = 0; 5005 5006 if (sdata->u.mgd.epcs.enabled == enabled) 5007 return; 5008 5009 sdata->u.mgd.epcs.enabled = enabled; 5010 cfg80211_epcs_changed(sdata->dev, enabled); 5011 } 5012 5013 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5014 { 5015 struct ieee80211_local *local = sdata->local; 5016 u8 link_id; 5017 5018 if (!sdata->u.mgd.epcs.enabled) 5019 return; 5020 5021 lockdep_assert_wiphy(local->hw.wiphy); 5022 5023 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5024 struct ieee802_11_elems *elems; 5025 struct ieee80211_link_data *link; 5026 const struct cfg80211_bss_ies *ies; 5027 bool ret; 5028 5029 rcu_read_lock(); 5030 5031 link = sdata_dereference(sdata->link[link_id], sdata); 5032 if (!link || !link->conf || !link->conf->bss) { 5033 rcu_read_unlock(); 5034 continue; 5035 } 5036 5037 if (link->u.mgd.disable_wmm_tracking) { 5038 rcu_read_unlock(); 5039 ieee80211_set_wmm_default(link, false, false); 5040 continue; 5041 } 5042 5043 ies = rcu_dereference(link->conf->bss->beacon_ies); 5044 if (!ies) { 5045 rcu_read_unlock(); 5046 ieee80211_set_wmm_default(link, false, false); 5047 continue; 5048 } 5049 5050 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5051 NULL); 5052 if (!elems) { 5053 rcu_read_unlock(); 5054 ieee80211_set_wmm_default(link, false, false); 5055 continue; 5056 } 5057 5058 ret = _ieee80211_sta_wmm_params(local, link, 5059 elems->wmm_param, 5060 elems->wmm_param_len, 5061 elems->mu_edca_param_set); 5062 5063 kfree(elems); 5064 rcu_read_unlock(); 5065 5066 if (!ret) { 5067 ieee80211_set_wmm_default(link, false, false); 5068 continue; 5069 } 5070 5071 ieee80211_mgd_set_link_qos_params(link); 5072 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5073 } 5074 } 5075 5076 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5077 struct link_sta_info *link_sta, 5078 struct cfg80211_bss *cbss, 5079 struct ieee80211_mgmt *mgmt, 5080 const u8 *elem_start, 5081 unsigned int elem_len, 5082 u64 *changed) 5083 { 5084 struct ieee80211_sub_if_data *sdata = link->sdata; 5085 struct ieee80211_mgd_assoc_data *assoc_data = 5086 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5087 struct ieee80211_bss_conf *bss_conf = link->conf; 5088 struct ieee80211_local *local = sdata->local; 5089 unsigned int link_id = link->link_id; 5090 struct ieee80211_elems_parse_params parse_params = { 5091 .mode = link->u.mgd.conn.mode, 5092 .start = elem_start, 5093 .len = elem_len, 5094 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5095 .from_ap = true, 5096 }; 5097 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5098 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5099 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5100 const struct cfg80211_bss_ies *bss_ies = NULL; 5101 struct ieee80211_supported_band *sband; 5102 struct ieee802_11_elems *elems; 5103 const __le16 prof_bss_param_ch_present = 5104 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5105 u16 capab_info; 5106 bool ret; 5107 5108 elems = ieee802_11_parse_elems_full(&parse_params); 5109 if (!elems) 5110 return false; 5111 5112 if (link_id == assoc_data->assoc_link_id) { 5113 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5114 5115 /* 5116 * we should not get to this flow unless the association was 5117 * successful, so set the status directly to success 5118 */ 5119 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5120 if (elems->ml_basic) { 5121 int bss_param_ch_cnt = 5122 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5123 5124 if (bss_param_ch_cnt < 0) { 5125 ret = false; 5126 goto out; 5127 } 5128 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5129 bss_conf->bss_param_ch_cnt_link_id = link_id; 5130 } 5131 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5132 !elems->prof || 5133 !(elems->prof->control & prof_bss_param_ch_present)) { 5134 ret = false; 5135 goto out; 5136 } else { 5137 const u8 *ptr = elems->prof->variable + 5138 elems->prof->sta_info_len - 1; 5139 int bss_param_ch_cnt; 5140 5141 /* 5142 * During parsing, we validated that these fields exist, 5143 * otherwise elems->prof would have been set to NULL. 5144 */ 5145 capab_info = get_unaligned_le16(ptr); 5146 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5147 bss_param_ch_cnt = 5148 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5149 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5150 bss_conf->bss_param_ch_cnt_link_id = link_id; 5151 5152 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5153 link_info(link, "association response status code=%u\n", 5154 assoc_data->link[link_id].status); 5155 ret = true; 5156 goto out; 5157 } 5158 } 5159 5160 if (!is_s1g && !elems->supp_rates) { 5161 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5162 ret = false; 5163 goto out; 5164 } 5165 5166 link->u.mgd.tdls_chan_switch_prohibited = 5167 elems->ext_capab && elems->ext_capab_len >= 5 && 5168 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5169 5170 /* 5171 * Some APs are erroneously not including some information in their 5172 * (re)association response frames. Try to recover by using the data 5173 * from the beacon or probe response. This seems to afflict mobile 5174 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5175 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5176 */ 5177 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5178 ((assoc_data->wmm && !elems->wmm_param) || 5179 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5180 (!elems->ht_cap_elem || !elems->ht_operation)) || 5181 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5182 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5183 const struct cfg80211_bss_ies *ies; 5184 struct ieee802_11_elems *bss_elems; 5185 5186 rcu_read_lock(); 5187 ies = rcu_dereference(cbss->ies); 5188 if (ies) 5189 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5190 GFP_ATOMIC); 5191 rcu_read_unlock(); 5192 if (!bss_ies) { 5193 ret = false; 5194 goto out; 5195 } 5196 5197 parse_params.start = bss_ies->data; 5198 parse_params.len = bss_ies->len; 5199 parse_params.bss = cbss; 5200 parse_params.link_id = -1; 5201 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5202 if (!bss_elems) { 5203 ret = false; 5204 goto out; 5205 } 5206 5207 if (assoc_data->wmm && 5208 !elems->wmm_param && bss_elems->wmm_param) { 5209 elems->wmm_param = bss_elems->wmm_param; 5210 sdata_info(sdata, 5211 "AP bug: WMM param missing from AssocResp\n"); 5212 } 5213 5214 /* 5215 * Also check if we requested HT/VHT, otherwise the AP doesn't 5216 * have to include the IEs in the (re)association response. 5217 */ 5218 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5219 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5220 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5221 sdata_info(sdata, 5222 "AP bug: HT capability missing from AssocResp\n"); 5223 } 5224 if (!elems->ht_operation && bss_elems->ht_operation && 5225 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5226 elems->ht_operation = bss_elems->ht_operation; 5227 sdata_info(sdata, 5228 "AP bug: HT operation missing from AssocResp\n"); 5229 } 5230 5231 if (is_5ghz) { 5232 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5233 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5234 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5235 sdata_info(sdata, 5236 "AP bug: VHT capa missing from AssocResp\n"); 5237 } 5238 5239 if (!elems->vht_operation && bss_elems->vht_operation && 5240 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5241 elems->vht_operation = bss_elems->vht_operation; 5242 sdata_info(sdata, 5243 "AP bug: VHT operation missing from AssocResp\n"); 5244 } 5245 } 5246 kfree(bss_elems); 5247 } 5248 5249 /* 5250 * We previously checked these in the beacon/probe response, so 5251 * they should be present here. This is just a safety net. 5252 * Note that the ieee80211_config_bw() below would also check 5253 * for this (and more), but this has better error reporting. 5254 */ 5255 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5256 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5257 sdata_info(sdata, 5258 "HT AP is missing WMM params or HT capability/operation\n"); 5259 ret = false; 5260 goto out; 5261 } 5262 5263 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5264 (!elems->vht_cap_elem || !elems->vht_operation)) { 5265 sdata_info(sdata, 5266 "VHT AP is missing VHT capability/operation\n"); 5267 ret = false; 5268 goto out; 5269 } 5270 5271 /* check/update if AP changed anything in assoc response vs. scan */ 5272 if (ieee80211_config_bw(link, elems, 5273 link_id == assoc_data->assoc_link_id, 5274 changed, "assoc response")) { 5275 ret = false; 5276 goto out; 5277 } 5278 5279 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5280 ret = false; 5281 goto out; 5282 } 5283 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5284 5285 /* Set up internal HT/VHT capabilities */ 5286 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5287 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5288 elems->ht_cap_elem, 5289 link_sta); 5290 5291 if (elems->vht_cap_elem && 5292 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5293 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5294 const struct cfg80211_bss_ies *ies; 5295 5296 /* 5297 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5298 * too large maximum MPDU length in the association response 5299 * (indicating 12k) that it cannot actually process ... 5300 * Work around that. 5301 */ 5302 rcu_read_lock(); 5303 ies = rcu_dereference(cbss->ies); 5304 if (ies) { 5305 const struct element *elem; 5306 5307 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5308 ies->data, ies->len); 5309 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5310 bss_vht_cap = (const void *)elem->data; 5311 } 5312 5313 if (ieee80211_hw_check(&local->hw, STRICT) && 5314 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5315 sizeof(*bss_vht_cap)))) { 5316 rcu_read_unlock(); 5317 ret = false; 5318 link_info(link, "VHT capabilities mismatch\n"); 5319 goto out; 5320 } 5321 5322 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5323 elems->vht_cap_elem, 5324 bss_vht_cap, link_sta); 5325 rcu_read_unlock(); 5326 } 5327 5328 if (elems->he_operation && 5329 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5330 elems->he_cap) { 5331 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5332 elems->he_cap, 5333 elems->he_cap_len, 5334 elems->he_6ghz_capa, 5335 link_sta); 5336 5337 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5338 if (elems->rsnx && elems->rsnx_len && 5339 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5340 wiphy_ext_feature_isset(local->hw.wiphy, 5341 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5342 bss_conf->twt_protected = true; 5343 else 5344 bss_conf->twt_protected = false; 5345 5346 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5347 link_sta, elems); 5348 5349 if (elems->eht_operation && elems->eht_cap && 5350 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5351 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5352 elems->he_cap, 5353 elems->he_cap_len, 5354 elems->eht_cap, 5355 elems->eht_cap_len, 5356 link_sta); 5357 5358 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5359 bss_conf->epcs_support = bss_conf->eht_support && 5360 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5361 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5362 5363 /* EPCS might be already enabled but a new added link 5364 * does not support EPCS. This should not really happen 5365 * in practice. 5366 */ 5367 if (sdata->u.mgd.epcs.enabled && 5368 !bss_conf->epcs_support) 5369 ieee80211_epcs_teardown(sdata); 5370 } else { 5371 bss_conf->eht_support = false; 5372 bss_conf->epcs_support = false; 5373 } 5374 } else { 5375 bss_conf->he_support = false; 5376 bss_conf->twt_requester = false; 5377 bss_conf->twt_protected = false; 5378 bss_conf->eht_support = false; 5379 bss_conf->epcs_support = false; 5380 } 5381 5382 bss_conf->twt_broadcast = 5383 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5384 5385 if (bss_conf->he_support) { 5386 bss_conf->he_bss_color.color = 5387 le32_get_bits(elems->he_operation->he_oper_params, 5388 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5389 bss_conf->he_bss_color.partial = 5390 le32_get_bits(elems->he_operation->he_oper_params, 5391 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5392 bss_conf->he_bss_color.enabled = 5393 !le32_get_bits(elems->he_operation->he_oper_params, 5394 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5395 5396 if (bss_conf->he_bss_color.enabled) 5397 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5398 5399 bss_conf->htc_trig_based_pkt_ext = 5400 le32_get_bits(elems->he_operation->he_oper_params, 5401 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5402 bss_conf->frame_time_rts_th = 5403 le32_get_bits(elems->he_operation->he_oper_params, 5404 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5405 5406 bss_conf->uora_exists = !!elems->uora_element; 5407 if (elems->uora_element) 5408 bss_conf->uora_ocw_range = elems->uora_element[0]; 5409 5410 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5411 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5412 /* TODO: OPEN: what happens if BSS color disable is set? */ 5413 } 5414 5415 if (cbss->transmitted_bss) { 5416 bss_conf->nontransmitted = true; 5417 ether_addr_copy(bss_conf->transmitter_bssid, 5418 cbss->transmitted_bss->bssid); 5419 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5420 bss_conf->bssid_index = cbss->bssid_index; 5421 } 5422 5423 /* 5424 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5425 * in their association response, so ignore that data for our own 5426 * configuration. If it changed since the last beacon, we'll get the 5427 * next beacon and update then. 5428 */ 5429 5430 /* 5431 * If an operating mode notification IE is present, override the 5432 * NSS calculation (that would be done in rate_control_rate_init()) 5433 * and use the # of streams from that element. 5434 */ 5435 if (elems->opmode_notif && 5436 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5437 u8 nss; 5438 5439 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5440 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5441 nss += 1; 5442 link_sta->pub->rx_nss = nss; 5443 } 5444 5445 /* 5446 * Always handle WMM once after association regardless 5447 * of the first value the AP uses. Setting -1 here has 5448 * that effect because the AP values is an unsigned 5449 * 4-bit value. 5450 */ 5451 link->u.mgd.wmm_last_param_set = -1; 5452 link->u.mgd.mu_edca_last_param_set = -1; 5453 5454 if (link->u.mgd.disable_wmm_tracking) { 5455 ieee80211_set_wmm_default(link, false, false); 5456 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5457 elems->wmm_param_len, 5458 elems->mu_edca_param_set)) { 5459 /* still enable QoS since we might have HT/VHT */ 5460 ieee80211_set_wmm_default(link, false, true); 5461 /* disable WMM tracking in this case to disable 5462 * tracking WMM parameter changes in the beacon if 5463 * the parameters weren't actually valid. Doing so 5464 * avoids changing parameters very strangely when 5465 * the AP is going back and forth between valid and 5466 * invalid parameters. 5467 */ 5468 link->u.mgd.disable_wmm_tracking = true; 5469 } 5470 5471 if (elems->max_idle_period_ie) { 5472 bss_conf->max_idle_period = 5473 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5474 bss_conf->protected_keep_alive = 5475 !!(elems->max_idle_period_ie->idle_options & 5476 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5477 *changed |= BSS_CHANGED_KEEP_ALIVE; 5478 } else { 5479 bss_conf->max_idle_period = 0; 5480 bss_conf->protected_keep_alive = false; 5481 } 5482 5483 /* set assoc capability (AID was already set earlier), 5484 * ieee80211_set_associated() will tell the driver */ 5485 bss_conf->assoc_capability = capab_info; 5486 5487 ret = true; 5488 out: 5489 kfree(elems); 5490 kfree(bss_ies); 5491 return ret; 5492 } 5493 5494 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5495 struct sta_info *sta, 5496 struct link_sta_info *link_sta, 5497 struct cfg80211_bss *cbss) 5498 { 5499 struct ieee80211_sub_if_data *sdata = link->sdata; 5500 struct ieee80211_local *local = sdata->local; 5501 struct ieee80211_bss *bss = (void *)cbss->priv; 5502 u32 rates = 0, basic_rates = 0; 5503 bool have_higher_than_11mbit = false; 5504 int min_rate = INT_MAX, min_rate_index = -1; 5505 struct ieee80211_supported_band *sband; 5506 5507 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5508 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5509 5510 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5511 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5512 ieee80211_s1g_sta_rate_init(sta); 5513 return 0; 5514 } 5515 5516 sband = local->hw.wiphy->bands[cbss->channel->band]; 5517 5518 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5519 NULL, 0, 5520 &rates, &basic_rates, NULL, 5521 &have_higher_than_11mbit, 5522 &min_rate, &min_rate_index); 5523 5524 /* 5525 * This used to be a workaround for basic rates missing 5526 * in the association response frame. Now that we no 5527 * longer use the basic rates from there, it probably 5528 * doesn't happen any more, but keep the workaround so 5529 * in case some *other* APs are buggy in different ways 5530 * we can connect -- with a warning. 5531 * Allow this workaround only in case the AP provided at least 5532 * one rate. 5533 */ 5534 if (min_rate_index < 0) { 5535 link_info(link, "No legacy rates in association response\n"); 5536 return -EINVAL; 5537 } else if (!basic_rates) { 5538 link_info(link, "No basic rates, using min rate instead\n"); 5539 basic_rates = BIT(min_rate_index); 5540 } 5541 5542 if (rates) 5543 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5544 else 5545 link_info(link, "No rates found, keeping mandatory only\n"); 5546 5547 link->conf->basic_rates = basic_rates; 5548 5549 /* cf. IEEE 802.11 9.2.12 */ 5550 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5551 have_higher_than_11mbit; 5552 5553 return 0; 5554 } 5555 5556 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5557 struct cfg80211_bss *cbss) 5558 { 5559 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5560 const struct element *ht_cap_elem, *vht_cap_elem; 5561 const struct cfg80211_bss_ies *ies; 5562 const struct ieee80211_ht_cap *ht_cap; 5563 const struct ieee80211_vht_cap *vht_cap; 5564 const struct ieee80211_he_cap_elem *he_cap; 5565 const struct element *he_cap_elem; 5566 u16 mcs_80_map, mcs_160_map; 5567 int i, mcs_nss_size; 5568 bool support_160; 5569 u8 chains = 1; 5570 5571 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5572 return chains; 5573 5574 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5575 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5576 ht_cap = (void *)ht_cap_elem->data; 5577 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5578 /* 5579 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5580 * "Tx Unequal Modulation Supported" fields. 5581 */ 5582 } 5583 5584 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5585 return chains; 5586 5587 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5588 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5589 u8 nss; 5590 u16 tx_mcs_map; 5591 5592 vht_cap = (void *)vht_cap_elem->data; 5593 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5594 for (nss = 8; nss > 0; nss--) { 5595 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5596 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5597 break; 5598 } 5599 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5600 chains = max(chains, nss); 5601 } 5602 5603 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5604 return chains; 5605 5606 ies = rcu_dereference(cbss->ies); 5607 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5608 ies->data, ies->len); 5609 5610 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5611 return chains; 5612 5613 /* skip one byte ext_tag_id */ 5614 he_cap = (void *)(he_cap_elem->data + 1); 5615 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5616 5617 /* invalid HE IE */ 5618 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5619 return chains; 5620 5621 /* mcs_nss is right after he_cap info */ 5622 he_mcs_nss_supp = (void *)(he_cap + 1); 5623 5624 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5625 5626 for (i = 7; i >= 0; i--) { 5627 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5628 5629 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5630 chains = max_t(u8, chains, i + 1); 5631 break; 5632 } 5633 } 5634 5635 support_160 = he_cap->phy_cap_info[0] & 5636 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5637 5638 if (!support_160) 5639 return chains; 5640 5641 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5642 for (i = 7; i >= 0; i--) { 5643 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5644 5645 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5646 chains = max_t(u8, chains, i + 1); 5647 break; 5648 } 5649 } 5650 5651 return chains; 5652 } 5653 5654 static void 5655 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5656 struct ieee80211_supported_band *sband, 5657 struct cfg80211_assoc_request *req, 5658 bool wmm_used, int link_id, 5659 struct ieee80211_conn_settings *conn) 5660 { 5661 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5662 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5663 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5664 const struct ieee80211_sta_he_cap *he_cap; 5665 const struct ieee80211_sta_eht_cap *eht_cap; 5666 struct ieee80211_sta_vht_cap vht_cap; 5667 5668 if (sband->band == NL80211_BAND_S1GHZ) { 5669 conn->mode = IEEE80211_CONN_MODE_S1G; 5670 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5671 mlme_dbg(sdata, "operating as S1G STA\n"); 5672 return; 5673 } 5674 5675 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5676 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5677 5678 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5679 5680 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5681 mlme_link_id_dbg(sdata, link_id, 5682 "HT disabled by flag, limiting to legacy\n"); 5683 goto out; 5684 } 5685 5686 if (!wmm_used) { 5687 mlme_link_id_dbg(sdata, link_id, 5688 "WMM/QoS not supported, limiting to legacy\n"); 5689 goto out; 5690 } 5691 5692 if (req) { 5693 unsigned int i; 5694 5695 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5696 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5697 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5698 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5699 netdev_info(sdata->dev, 5700 "WEP/TKIP use, limiting to legacy\n"); 5701 goto out; 5702 } 5703 } 5704 } 5705 5706 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5707 mlme_link_id_dbg(sdata, link_id, 5708 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5709 goto out; 5710 } 5711 5712 /* HT is fine */ 5713 conn->mode = IEEE80211_CONN_MODE_HT; 5714 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5715 IEEE80211_CONN_BW_LIMIT_40 : 5716 IEEE80211_CONN_BW_LIMIT_20; 5717 5718 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5719 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5720 5721 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5722 mlme_link_id_dbg(sdata, link_id, 5723 "VHT disabled by flag, limiting to HT\n"); 5724 goto out; 5725 } 5726 5727 if (vht_cap.vht_supported && is_5ghz) { 5728 bool have_80mhz = false; 5729 unsigned int i; 5730 5731 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5732 mlme_link_id_dbg(sdata, link_id, 5733 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5734 goto out; 5735 } 5736 5737 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5738 for (i = 0; i < sband->n_channels; i++) { 5739 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5740 IEEE80211_CHAN_NO_80MHZ)) 5741 continue; 5742 5743 have_80mhz = true; 5744 break; 5745 } 5746 5747 if (!have_80mhz) { 5748 mlme_link_id_dbg(sdata, link_id, 5749 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5750 goto out; 5751 } 5752 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5753 mlme_link_id_dbg(sdata, link_id, 5754 "no VHT support on 5 GHz, limiting to HT\n"); 5755 goto out; 5756 } 5757 5758 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5759 if (sband->band != NL80211_BAND_2GHZ) { 5760 conn->mode = IEEE80211_CONN_MODE_VHT; 5761 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5762 } 5763 5764 if (is_5ghz && 5765 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5766 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5767 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5768 mlme_link_id_dbg(sdata, link_id, 5769 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5770 } 5771 5772 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5773 mlme_link_id_dbg(sdata, link_id, 5774 "HE disabled by flag, limiting to HT/VHT\n"); 5775 goto out; 5776 } 5777 5778 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5779 if (!he_cap) { 5780 WARN_ON(is_6ghz); 5781 mlme_link_id_dbg(sdata, link_id, 5782 "no HE support, limiting to HT/VHT\n"); 5783 goto out; 5784 } 5785 5786 /* so we have HE */ 5787 conn->mode = IEEE80211_CONN_MODE_HE; 5788 5789 /* check bandwidth */ 5790 switch (sband->band) { 5791 default: 5792 case NL80211_BAND_2GHZ: 5793 if (he_cap->he_cap_elem.phy_cap_info[0] & 5794 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5795 break; 5796 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5797 mlme_link_id_dbg(sdata, link_id, 5798 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5799 break; 5800 case NL80211_BAND_5GHZ: 5801 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5802 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5803 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5804 mlme_link_id_dbg(sdata, link_id, 5805 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5806 break; 5807 } 5808 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5809 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5810 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5811 conn->bw_limit, 5812 IEEE80211_CONN_BW_LIMIT_80); 5813 mlme_link_id_dbg(sdata, link_id, 5814 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5815 } 5816 break; 5817 case NL80211_BAND_6GHZ: 5818 if (he_cap->he_cap_elem.phy_cap_info[0] & 5819 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5820 break; 5821 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5822 conn->bw_limit, 5823 IEEE80211_CONN_BW_LIMIT_80); 5824 mlme_link_id_dbg(sdata, link_id, 5825 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5826 break; 5827 } 5828 5829 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5830 mlme_link_id_dbg(sdata, link_id, 5831 "EHT disabled by flag, limiting to HE\n"); 5832 goto out; 5833 } 5834 5835 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5836 if (!eht_cap) { 5837 mlme_link_id_dbg(sdata, link_id, 5838 "no EHT support, limiting to HE\n"); 5839 goto out; 5840 } 5841 5842 /* we have EHT */ 5843 5844 conn->mode = IEEE80211_CONN_MODE_EHT; 5845 5846 /* check bandwidth */ 5847 if (is_6ghz && 5848 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5849 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5850 else if (is_6ghz) 5851 mlme_link_id_dbg(sdata, link_id, 5852 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5853 5854 out: 5855 mlme_link_id_dbg(sdata, link_id, 5856 "determined local STA to be %s, BW limited to %d MHz\n", 5857 ieee80211_conn_mode_str(conn->mode), 5858 20 * (1 << conn->bw_limit)); 5859 } 5860 5861 static void 5862 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5863 struct ieee80211_supported_band *sband, 5864 struct cfg80211_auth_request *req, 5865 bool wmm_used, 5866 struct ieee80211_conn_settings *conn) 5867 { 5868 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5869 req->link_id > 0 ? req->link_id : 0, 5870 conn); 5871 } 5872 5873 static void 5874 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5875 struct ieee80211_supported_band *sband, 5876 struct cfg80211_assoc_request *req, 5877 bool wmm_used, int link_id, 5878 struct ieee80211_conn_settings *conn) 5879 { 5880 struct ieee80211_conn_settings tmp; 5881 5882 WARN_ON(!req); 5883 5884 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5885 &tmp); 5886 5887 conn->mode = min_t(enum ieee80211_conn_mode, 5888 conn->mode, tmp.mode); 5889 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5890 conn->bw_limit, tmp.bw_limit); 5891 } 5892 5893 static enum ieee80211_ap_reg_power 5894 ieee80211_ap_power_type(u8 control) 5895 { 5896 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5897 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5898 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5899 return IEEE80211_REG_LPI_AP; 5900 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5901 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5902 return IEEE80211_REG_SP_AP; 5903 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5904 return IEEE80211_REG_VLP_AP; 5905 default: 5906 return IEEE80211_REG_UNSET_AP; 5907 } 5908 } 5909 5910 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5911 struct ieee80211_link_data *link, 5912 int link_id, 5913 struct cfg80211_bss *cbss, bool mlo, 5914 struct ieee80211_conn_settings *conn, 5915 unsigned long *userspace_selectors) 5916 { 5917 struct ieee80211_local *local = sdata->local; 5918 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5919 struct ieee80211_chan_req chanreq = {}; 5920 struct cfg80211_chan_def ap_chandef; 5921 struct ieee802_11_elems *elems; 5922 int ret; 5923 5924 lockdep_assert_wiphy(local->hw.wiphy); 5925 5926 rcu_read_lock(); 5927 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5928 &chanreq, &ap_chandef, 5929 userspace_selectors); 5930 5931 if (IS_ERR(elems)) { 5932 rcu_read_unlock(); 5933 return PTR_ERR(elems); 5934 } 5935 5936 if (mlo && !elems->ml_basic) { 5937 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5938 rcu_read_unlock(); 5939 kfree(elems); 5940 return -EINVAL; 5941 } 5942 5943 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5944 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5945 5946 if (elems->pwr_constr_elem) 5947 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5948 5949 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5950 if (he_6ghz_oper) 5951 link->conf->power_type = 5952 ieee80211_ap_power_type(he_6ghz_oper->control); 5953 else 5954 link_info(link, 5955 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5956 cbss->channel->center_freq); 5957 5958 link->conf->tpe = elems->tpe; 5959 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5960 &chanreq.oper); 5961 } 5962 rcu_read_unlock(); 5963 /* the element data was RCU protected so no longer valid anyway */ 5964 kfree(elems); 5965 elems = NULL; 5966 5967 if (!link) 5968 return 0; 5969 5970 rcu_read_lock(); 5971 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5972 local->rx_chains); 5973 rcu_read_unlock(); 5974 5975 /* 5976 * If this fails (possibly due to channel context sharing 5977 * on incompatible channels, e.g. 80+80 and 160 sharing the 5978 * same control channel) try to use a smaller bandwidth. 5979 */ 5980 ret = ieee80211_link_use_channel(link, &chanreq, 5981 IEEE80211_CHANCTX_SHARED); 5982 5983 /* don't downgrade for 5 and 10 MHz channels, though. */ 5984 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5985 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5986 return ret; 5987 5988 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5989 ieee80211_chanreq_downgrade(&chanreq, conn); 5990 5991 ret = ieee80211_link_use_channel(link, &chanreq, 5992 IEEE80211_CHANCTX_SHARED); 5993 } 5994 5995 return ret; 5996 } 5997 5998 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5999 u8 *dtim_count, u8 *dtim_period) 6000 { 6001 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6002 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6003 ies->len); 6004 const struct ieee80211_tim_ie *tim = NULL; 6005 const struct ieee80211_bssid_index *idx; 6006 bool valid = tim_ie && tim_ie[1] >= 2; 6007 6008 if (valid) 6009 tim = (void *)(tim_ie + 2); 6010 6011 if (dtim_count) 6012 *dtim_count = valid ? tim->dtim_count : 0; 6013 6014 if (dtim_period) 6015 *dtim_period = valid ? tim->dtim_period : 0; 6016 6017 /* Check if value is overridden by non-transmitted profile */ 6018 if (!idx_ie || idx_ie[1] < 3) 6019 return valid; 6020 6021 idx = (void *)(idx_ie + 2); 6022 6023 if (dtim_count) 6024 *dtim_count = idx->dtim_count; 6025 6026 if (dtim_period) 6027 *dtim_period = idx->dtim_period; 6028 6029 return true; 6030 } 6031 6032 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6033 struct ieee80211_mgmt *mgmt, 6034 struct ieee802_11_elems *elems, 6035 const u8 *elem_start, unsigned int elem_len) 6036 { 6037 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6038 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6039 struct ieee80211_local *local = sdata->local; 6040 unsigned int link_id; 6041 struct sta_info *sta; 6042 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6043 u16 valid_links = 0, dormant_links = 0; 6044 int err; 6045 6046 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6047 /* 6048 * station info was already allocated and inserted before 6049 * the association and should be available to us 6050 */ 6051 sta = sta_info_get(sdata, assoc_data->ap_addr); 6052 if (WARN_ON(!sta)) 6053 goto out_err; 6054 6055 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6056 6057 if (ieee80211_vif_is_mld(&sdata->vif)) { 6058 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6059 if (!assoc_data->link[link_id].bss) 6060 continue; 6061 6062 valid_links |= BIT(link_id); 6063 if (assoc_data->link[link_id].disabled) 6064 dormant_links |= BIT(link_id); 6065 6066 if (link_id != assoc_data->assoc_link_id) { 6067 err = ieee80211_sta_allocate_link(sta, link_id); 6068 if (err) 6069 goto out_err; 6070 } 6071 } 6072 6073 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6074 } 6075 6076 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6077 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6078 struct ieee80211_link_data *link; 6079 struct link_sta_info *link_sta; 6080 6081 if (!cbss) 6082 continue; 6083 6084 link = sdata_dereference(sdata->link[link_id], sdata); 6085 if (WARN_ON(!link)) 6086 goto out_err; 6087 6088 if (ieee80211_vif_is_mld(&sdata->vif)) 6089 link_info(link, 6090 "local address %pM, AP link address %pM%s\n", 6091 link->conf->addr, 6092 assoc_data->link[link_id].bss->bssid, 6093 link_id == assoc_data->assoc_link_id ? 6094 " (assoc)" : ""); 6095 6096 link_sta = rcu_dereference_protected(sta->link[link_id], 6097 lockdep_is_held(&local->hw.wiphy->mtx)); 6098 if (WARN_ON(!link_sta)) 6099 goto out_err; 6100 6101 if (!link->u.mgd.have_beacon) { 6102 const struct cfg80211_bss_ies *ies; 6103 6104 rcu_read_lock(); 6105 ies = rcu_dereference(cbss->beacon_ies); 6106 if (ies) 6107 link->u.mgd.have_beacon = true; 6108 else 6109 ies = rcu_dereference(cbss->ies); 6110 ieee80211_get_dtim(ies, 6111 &link->conf->sync_dtim_count, 6112 &link->u.mgd.dtim_period); 6113 link->conf->beacon_int = cbss->beacon_interval; 6114 rcu_read_unlock(); 6115 } 6116 6117 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6118 6119 if (link_id != assoc_data->assoc_link_id) { 6120 link->u.mgd.conn = assoc_data->link[link_id].conn; 6121 6122 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6123 true, &link->u.mgd.conn, 6124 assoc_data->userspace_selectors); 6125 if (err) { 6126 link_info(link, "prep_channel failed\n"); 6127 goto out_err; 6128 } 6129 } 6130 6131 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6132 assoc_data->link[link_id].bss); 6133 if (err) 6134 goto out_err; 6135 6136 if (!ieee80211_assoc_config_link(link, link_sta, 6137 assoc_data->link[link_id].bss, 6138 mgmt, elem_start, elem_len, 6139 &changed[link_id])) 6140 goto out_err; 6141 6142 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6143 valid_links &= ~BIT(link_id); 6144 ieee80211_sta_remove_link(sta, link_id); 6145 continue; 6146 } 6147 6148 if (link_id != assoc_data->assoc_link_id) { 6149 err = ieee80211_sta_activate_link(sta, link_id); 6150 if (err) 6151 goto out_err; 6152 } 6153 } 6154 6155 /* links might have changed due to rejected ones, set them again */ 6156 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6157 6158 rate_control_rate_init_all_links(sta); 6159 6160 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6161 set_sta_flag(sta, WLAN_STA_MFP); 6162 sta->sta.mfp = true; 6163 } else { 6164 sta->sta.mfp = false; 6165 } 6166 6167 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6168 elems->ext_capab_len); 6169 6170 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6171 local->hw.queues >= IEEE80211_NUM_ACS; 6172 6173 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6174 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6175 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6176 if (err) { 6177 sdata_info(sdata, 6178 "failed to move station %pM to desired state\n", 6179 sta->sta.addr); 6180 WARN_ON(__sta_info_destroy(sta)); 6181 goto out_err; 6182 } 6183 6184 if (sdata->wdev.use_4addr) 6185 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6186 6187 ieee80211_set_associated(sdata, assoc_data, changed); 6188 6189 /* 6190 * If we're using 4-addr mode, let the AP know that we're 6191 * doing so, so that it can create the STA VLAN on its side 6192 */ 6193 if (ifmgd->use_4addr) 6194 ieee80211_send_4addr_nullfunc(local, sdata); 6195 6196 /* 6197 * Start timer to probe the connection to the AP now. 6198 * Also start the timer that will detect beacon loss. 6199 */ 6200 ieee80211_sta_reset_beacon_monitor(sdata); 6201 ieee80211_sta_reset_conn_monitor(sdata); 6202 6203 return true; 6204 out_err: 6205 eth_zero_addr(sdata->vif.cfg.ap_addr); 6206 return false; 6207 } 6208 6209 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6210 struct ieee80211_mgmt *mgmt, 6211 size_t len) 6212 { 6213 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6214 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6215 u16 capab_info, status_code, aid; 6216 struct ieee80211_elems_parse_params parse_params = { 6217 .bss = NULL, 6218 .link_id = -1, 6219 .from_ap = true, 6220 }; 6221 struct ieee802_11_elems *elems; 6222 int ac; 6223 const u8 *elem_start; 6224 unsigned int elem_len; 6225 bool reassoc; 6226 struct ieee80211_event event = { 6227 .type = MLME_EVENT, 6228 .u.mlme.data = ASSOC_EVENT, 6229 }; 6230 struct ieee80211_prep_tx_info info = {}; 6231 struct cfg80211_rx_assoc_resp_data resp = { 6232 .uapsd_queues = -1, 6233 }; 6234 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6235 unsigned int link_id; 6236 6237 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6238 6239 if (!assoc_data) 6240 return; 6241 6242 info.link_id = assoc_data->assoc_link_id; 6243 6244 parse_params.mode = 6245 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6246 6247 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6248 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6249 return; 6250 6251 /* 6252 * AssocResp and ReassocResp have identical structure, so process both 6253 * of them in this function. 6254 */ 6255 6256 if (len < 24 + 6) 6257 return; 6258 6259 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6260 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6261 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6262 if (assoc_data->s1g) 6263 elem_start = mgmt->u.s1g_assoc_resp.variable; 6264 else 6265 elem_start = mgmt->u.assoc_resp.variable; 6266 6267 /* 6268 * Note: this may not be perfect, AP might misbehave - if 6269 * anyone needs to rely on perfect complete notification 6270 * with the exact right subtype, then we need to track what 6271 * we actually transmitted. 6272 */ 6273 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6274 IEEE80211_STYPE_ASSOC_REQ; 6275 6276 if (assoc_data->fils_kek_len && 6277 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6278 return; 6279 6280 elem_len = len - (elem_start - (u8 *)mgmt); 6281 parse_params.start = elem_start; 6282 parse_params.len = elem_len; 6283 elems = ieee802_11_parse_elems_full(&parse_params); 6284 if (!elems) 6285 goto notify_driver; 6286 6287 if (elems->aid_resp) 6288 aid = le16_to_cpu(elems->aid_resp->aid); 6289 else if (assoc_data->s1g) 6290 aid = 0; /* TODO */ 6291 else 6292 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6293 6294 /* 6295 * The 5 MSB of the AID field are reserved 6296 * (802.11-2016 9.4.1.8 AID field) 6297 */ 6298 aid &= 0x7ff; 6299 6300 sdata_info(sdata, 6301 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6302 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6303 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6304 6305 ifmgd->broken_ap = false; 6306 6307 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6308 elems->timeout_int && 6309 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6310 u32 tu, ms; 6311 6312 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6313 le32_to_cpu(elems->timeout_int->value)); 6314 6315 tu = le32_to_cpu(elems->timeout_int->value); 6316 ms = tu * 1024 / 1000; 6317 sdata_info(sdata, 6318 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6319 assoc_data->ap_addr, tu, ms); 6320 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6321 assoc_data->timeout_started = true; 6322 assoc_data->comeback = true; 6323 if (ms > IEEE80211_ASSOC_TIMEOUT) 6324 run_again(sdata, assoc_data->timeout); 6325 goto notify_driver; 6326 } 6327 6328 if (status_code != WLAN_STATUS_SUCCESS) { 6329 sdata_info(sdata, "%pM denied association (code=%d)\n", 6330 assoc_data->ap_addr, status_code); 6331 event.u.mlme.status = MLME_DENIED; 6332 event.u.mlme.reason = status_code; 6333 drv_event_callback(sdata->local, sdata, &event); 6334 } else { 6335 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6336 sdata_info(sdata, 6337 "invalid AID value %d (out of range), turn off PS\n", 6338 aid); 6339 aid = 0; 6340 ifmgd->broken_ap = true; 6341 } 6342 6343 if (ieee80211_vif_is_mld(&sdata->vif)) { 6344 struct ieee80211_mle_basic_common_info *common; 6345 6346 if (!elems->ml_basic) { 6347 sdata_info(sdata, 6348 "MLO association with %pM but no (basic) multi-link element in response!\n", 6349 assoc_data->ap_addr); 6350 goto abandon_assoc; 6351 } 6352 6353 common = (void *)elems->ml_basic->variable; 6354 6355 if (memcmp(assoc_data->ap_addr, 6356 common->mld_mac_addr, ETH_ALEN)) { 6357 sdata_info(sdata, 6358 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6359 common->mld_mac_addr, 6360 assoc_data->ap_addr); 6361 goto abandon_assoc; 6362 } 6363 6364 sdata->vif.cfg.eml_cap = 6365 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6366 sdata->vif.cfg.eml_med_sync_delay = 6367 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6368 sdata->vif.cfg.mld_capa_op = 6369 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6370 } 6371 6372 sdata->vif.cfg.aid = aid; 6373 6374 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6375 elem_start, elem_len)) { 6376 /* oops -- internal error -- send timeout for now */ 6377 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6378 goto notify_driver; 6379 } 6380 event.u.mlme.status = MLME_SUCCESS; 6381 drv_event_callback(sdata->local, sdata, &event); 6382 sdata_info(sdata, "associated\n"); 6383 6384 info.success = 1; 6385 } 6386 6387 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6388 struct ieee80211_link_data *link; 6389 6390 if (!assoc_data->link[link_id].bss) 6391 continue; 6392 6393 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6394 ether_addr_copy(resp.links[link_id].addr, 6395 assoc_data->link[link_id].addr); 6396 resp.links[link_id].status = assoc_data->link[link_id].status; 6397 6398 link = sdata_dereference(sdata->link[link_id], sdata); 6399 if (!link) 6400 continue; 6401 6402 /* get uapsd queues configuration - same for all links */ 6403 resp.uapsd_queues = 0; 6404 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6405 if (link->tx_conf[ac].uapsd) 6406 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6407 } 6408 6409 if (ieee80211_vif_is_mld(&sdata->vif)) { 6410 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6411 resp.ap_mld_addr = ap_mld_addr; 6412 } 6413 6414 ieee80211_destroy_assoc_data(sdata, 6415 status_code == WLAN_STATUS_SUCCESS ? 6416 ASSOC_SUCCESS : 6417 ASSOC_REJECTED); 6418 6419 resp.buf = (u8 *)mgmt; 6420 resp.len = len; 6421 resp.req_ies = ifmgd->assoc_req_ies; 6422 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6423 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6424 notify_driver: 6425 drv_mgd_complete_tx(sdata->local, sdata, &info); 6426 kfree(elems); 6427 return; 6428 abandon_assoc: 6429 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6430 goto notify_driver; 6431 } 6432 6433 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6434 struct ieee80211_mgmt *mgmt, size_t len, 6435 struct ieee80211_rx_status *rx_status) 6436 { 6437 struct ieee80211_sub_if_data *sdata = link->sdata; 6438 struct ieee80211_local *local = sdata->local; 6439 struct ieee80211_bss *bss; 6440 struct ieee80211_channel *channel; 6441 6442 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6443 6444 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6445 ieee80211_rx_status_to_khz(rx_status)); 6446 if (!channel) 6447 return; 6448 6449 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6450 if (bss) { 6451 link->conf->beacon_rate = bss->beacon_rate; 6452 ieee80211_rx_bss_put(local, bss); 6453 } 6454 } 6455 6456 6457 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6458 struct sk_buff *skb) 6459 { 6460 struct ieee80211_sub_if_data *sdata = link->sdata; 6461 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6462 struct ieee80211_if_managed *ifmgd; 6463 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6464 struct ieee80211_channel *channel; 6465 size_t baselen, len = skb->len; 6466 6467 ifmgd = &sdata->u.mgd; 6468 6469 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6470 6471 /* 6472 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6473 * "If a 6 GHz AP receives a Probe Request frame and responds with 6474 * a Probe Response frame [..], the Address 1 field of the Probe 6475 * Response frame shall be set to the broadcast address [..]" 6476 * So, on 6GHz band we should also accept broadcast responses. 6477 */ 6478 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6479 rx_status->freq); 6480 if (!channel) 6481 return; 6482 6483 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6484 (channel->band != NL80211_BAND_6GHZ || 6485 !is_broadcast_ether_addr(mgmt->da))) 6486 return; /* ignore ProbeResp to foreign address */ 6487 6488 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6489 if (baselen > len) 6490 return; 6491 6492 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6493 6494 if (ifmgd->associated && 6495 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6496 ieee80211_reset_ap_probe(sdata); 6497 } 6498 6499 /* 6500 * This is the canonical list of information elements we care about, 6501 * the filter code also gives us all changes to the Microsoft OUI 6502 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6503 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6504 * changes to requested client power. 6505 * 6506 * We implement beacon filtering in software since that means we can 6507 * avoid processing the frame here and in cfg80211, and userspace 6508 * will not be able to tell whether the hardware supports it or not. 6509 * 6510 * XXX: This list needs to be dynamic -- userspace needs to be able to 6511 * add items it requires. It also needs to be able to tell us to 6512 * look out for other vendor IEs. 6513 */ 6514 static const u64 care_about_ies = 6515 (1ULL << WLAN_EID_COUNTRY) | 6516 (1ULL << WLAN_EID_ERP_INFO) | 6517 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6518 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6519 (1ULL << WLAN_EID_HT_CAPABILITY) | 6520 (1ULL << WLAN_EID_HT_OPERATION) | 6521 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6522 6523 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6524 struct ieee80211_if_managed *ifmgd, 6525 struct ieee80211_bss_conf *bss_conf, 6526 struct ieee80211_local *local, 6527 struct ieee80211_rx_status *rx_status) 6528 { 6529 struct ieee80211_sub_if_data *sdata = link->sdata; 6530 6531 /* Track average RSSI from the Beacon frames of the current AP */ 6532 6533 if (!link->u.mgd.tracking_signal_avg) { 6534 link->u.mgd.tracking_signal_avg = true; 6535 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6536 link->u.mgd.last_cqm_event_signal = 0; 6537 link->u.mgd.count_beacon_signal = 1; 6538 link->u.mgd.last_ave_beacon_signal = 0; 6539 } else { 6540 link->u.mgd.count_beacon_signal++; 6541 } 6542 6543 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6544 -rx_status->signal); 6545 6546 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6547 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6548 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6549 int last_sig = link->u.mgd.last_ave_beacon_signal; 6550 struct ieee80211_event event = { 6551 .type = RSSI_EVENT, 6552 }; 6553 6554 /* 6555 * if signal crosses either of the boundaries, invoke callback 6556 * with appropriate parameters 6557 */ 6558 if (sig > ifmgd->rssi_max_thold && 6559 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6560 link->u.mgd.last_ave_beacon_signal = sig; 6561 event.u.rssi.data = RSSI_EVENT_HIGH; 6562 drv_event_callback(local, sdata, &event); 6563 } else if (sig < ifmgd->rssi_min_thold && 6564 (last_sig >= ifmgd->rssi_max_thold || 6565 last_sig == 0)) { 6566 link->u.mgd.last_ave_beacon_signal = sig; 6567 event.u.rssi.data = RSSI_EVENT_LOW; 6568 drv_event_callback(local, sdata, &event); 6569 } 6570 } 6571 6572 if (bss_conf->cqm_rssi_thold && 6573 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6574 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6575 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6576 int last_event = link->u.mgd.last_cqm_event_signal; 6577 int thold = bss_conf->cqm_rssi_thold; 6578 int hyst = bss_conf->cqm_rssi_hyst; 6579 6580 if (sig < thold && 6581 (last_event == 0 || sig < last_event - hyst)) { 6582 link->u.mgd.last_cqm_event_signal = sig; 6583 ieee80211_cqm_rssi_notify( 6584 &sdata->vif, 6585 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6586 sig, GFP_KERNEL); 6587 } else if (sig > thold && 6588 (last_event == 0 || sig > last_event + hyst)) { 6589 link->u.mgd.last_cqm_event_signal = sig; 6590 ieee80211_cqm_rssi_notify( 6591 &sdata->vif, 6592 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6593 sig, GFP_KERNEL); 6594 } 6595 } 6596 6597 if (bss_conf->cqm_rssi_low && 6598 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6599 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6600 int last_event = link->u.mgd.last_cqm_event_signal; 6601 int low = bss_conf->cqm_rssi_low; 6602 int high = bss_conf->cqm_rssi_high; 6603 6604 if (sig < low && 6605 (last_event == 0 || last_event >= low)) { 6606 link->u.mgd.last_cqm_event_signal = sig; 6607 ieee80211_cqm_rssi_notify( 6608 &sdata->vif, 6609 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6610 sig, GFP_KERNEL); 6611 } else if (sig > high && 6612 (last_event == 0 || last_event <= high)) { 6613 link->u.mgd.last_cqm_event_signal = sig; 6614 ieee80211_cqm_rssi_notify( 6615 &sdata->vif, 6616 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6617 sig, GFP_KERNEL); 6618 } 6619 } 6620 } 6621 6622 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6623 struct cfg80211_bss *bss) 6624 { 6625 if (ether_addr_equal(tx_bssid, bss->bssid)) 6626 return true; 6627 if (!bss->transmitted_bss) 6628 return false; 6629 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6630 } 6631 6632 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6633 struct wiphy_work *work) 6634 { 6635 struct ieee80211_sub_if_data *sdata = 6636 container_of(work, struct ieee80211_sub_if_data, 6637 u.mgd.ml_reconf_work.work); 6638 u16 new_valid_links, new_active_links, new_dormant_links; 6639 int ret; 6640 6641 if (!sdata->u.mgd.removed_links) 6642 return; 6643 6644 sdata_info(sdata, 6645 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6646 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6647 6648 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6649 if (new_valid_links == sdata->vif.valid_links) 6650 return; 6651 6652 if (!new_valid_links || 6653 !(new_valid_links & ~sdata->vif.dormant_links)) { 6654 sdata_info(sdata, "No valid links after reconfiguration\n"); 6655 ret = -EINVAL; 6656 goto out; 6657 } 6658 6659 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6660 if (new_active_links != sdata->vif.active_links) { 6661 if (!new_active_links) 6662 new_active_links = 6663 BIT(ffs(new_valid_links & 6664 ~sdata->vif.dormant_links) - 1); 6665 6666 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6667 if (ret) { 6668 sdata_info(sdata, 6669 "Failed setting active links\n"); 6670 goto out; 6671 } 6672 } 6673 6674 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6675 6676 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6677 new_dormant_links); 6678 if (ret) 6679 sdata_info(sdata, "Failed setting valid links\n"); 6680 6681 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6682 6683 out: 6684 if (!ret) 6685 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6686 else 6687 __ieee80211_disconnect(sdata); 6688 6689 sdata->u.mgd.removed_links = 0; 6690 } 6691 6692 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6693 struct ieee802_11_elems *elems) 6694 { 6695 const struct element *sub; 6696 unsigned long removed_links = 0; 6697 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6698 u8 link_id; 6699 u32 delay; 6700 6701 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6702 return; 6703 6704 /* Directly parse the sub elements as the common information doesn't 6705 * hold any useful information. 6706 */ 6707 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6708 elems->ml_reconf_len) { 6709 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6710 u8 *pos = prof->variable; 6711 u16 control; 6712 6713 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6714 continue; 6715 6716 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6717 sub->datalen)) 6718 return; 6719 6720 control = le16_to_cpu(prof->control); 6721 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6722 6723 removed_links |= BIT(link_id); 6724 6725 /* the MAC address should not be included, but handle it */ 6726 if (control & 6727 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6728 pos += 6; 6729 6730 /* According to Draft P802.11be_D3.0, the control should 6731 * include the AP Removal Timer present. If the AP Removal Timer 6732 * is not present assume immediate removal. 6733 */ 6734 if (control & 6735 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6736 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6737 } 6738 6739 removed_links &= sdata->vif.valid_links; 6740 if (!removed_links) { 6741 /* In case the removal was cancelled, abort it */ 6742 if (sdata->u.mgd.removed_links) { 6743 sdata->u.mgd.removed_links = 0; 6744 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6745 &sdata->u.mgd.ml_reconf_work); 6746 } 6747 return; 6748 } 6749 6750 delay = 0; 6751 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6752 struct ieee80211_bss_conf *link_conf = 6753 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6754 u32 link_delay; 6755 6756 if (!link_conf) { 6757 removed_links &= ~BIT(link_id); 6758 continue; 6759 } 6760 6761 if (link_removal_timeout[link_id] < 1) 6762 link_delay = 0; 6763 else 6764 link_delay = link_conf->beacon_int * 6765 (link_removal_timeout[link_id] - 1); 6766 6767 if (!delay) 6768 delay = link_delay; 6769 else 6770 delay = min(delay, link_delay); 6771 } 6772 6773 sdata->u.mgd.removed_links = removed_links; 6774 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6775 &sdata->u.mgd.ml_reconf_work, 6776 TU_TO_JIFFIES(delay)); 6777 } 6778 6779 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6780 u16 active_links, u16 dormant_links, 6781 u16 suspended_links) 6782 { 6783 u64 changed = 0; 6784 int ret; 6785 6786 if (!active_links) { 6787 ret = -EINVAL; 6788 goto out; 6789 } 6790 6791 /* If there is an active negotiated TTLM, it should be discarded by 6792 * the new negotiated/advertised TTLM. 6793 */ 6794 if (sdata->vif.neg_ttlm.valid) { 6795 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6796 sdata->vif.suspended_links = 0; 6797 changed = BSS_CHANGED_MLD_TTLM; 6798 } 6799 6800 if (sdata->vif.active_links != active_links) { 6801 /* usable links are affected when active_links are changed, 6802 * so notify the driver about the status change 6803 */ 6804 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6805 active_links &= sdata->vif.active_links; 6806 if (!active_links) 6807 active_links = 6808 BIT(__ffs(sdata->vif.valid_links & 6809 ~dormant_links)); 6810 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6811 if (ret) { 6812 sdata_info(sdata, "Failed to set TTLM active links\n"); 6813 goto out; 6814 } 6815 } 6816 6817 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6818 dormant_links); 6819 if (ret) { 6820 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6821 goto out; 6822 } 6823 6824 sdata->vif.suspended_links = suspended_links; 6825 if (sdata->vif.suspended_links) 6826 changed |= BSS_CHANGED_MLD_TTLM; 6827 6828 ieee80211_vif_cfg_change_notify(sdata, changed); 6829 6830 out: 6831 if (ret) 6832 ieee80211_disconnect(&sdata->vif, false); 6833 6834 return ret; 6835 } 6836 6837 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6838 struct wiphy_work *work) 6839 { 6840 u16 new_active_links, new_dormant_links; 6841 struct ieee80211_sub_if_data *sdata = 6842 container_of(work, struct ieee80211_sub_if_data, 6843 u.mgd.ttlm_work.work); 6844 6845 new_active_links = sdata->u.mgd.ttlm_info.map & 6846 sdata->vif.valid_links; 6847 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6848 sdata->vif.valid_links; 6849 6850 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6851 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6852 0)) 6853 return; 6854 6855 sdata->u.mgd.ttlm_info.active = true; 6856 sdata->u.mgd.ttlm_info.switch_time = 0; 6857 } 6858 6859 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6860 { 6861 if (bm_size == 1) 6862 return *data; 6863 else 6864 return get_unaligned_le16(data); 6865 } 6866 6867 static int 6868 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6869 const struct ieee80211_ttlm_elem *ttlm, 6870 struct ieee80211_adv_ttlm_info *ttlm_info) 6871 { 6872 /* The element size was already validated in 6873 * ieee80211_tid_to_link_map_size_ok() 6874 */ 6875 u8 control, link_map_presence, map_size, tid; 6876 u8 *pos; 6877 6878 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6879 pos = (void *)ttlm->optional; 6880 control = ttlm->control; 6881 6882 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6883 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6884 return 0; 6885 6886 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6887 IEEE80211_TTLM_DIRECTION_BOTH) { 6888 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6889 return -EINVAL; 6890 } 6891 6892 link_map_presence = *pos; 6893 pos++; 6894 6895 ttlm_info->switch_time = get_unaligned_le16(pos); 6896 6897 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6898 * by 1. 6899 */ 6900 if (!ttlm_info->switch_time) 6901 ttlm_info->switch_time = 1; 6902 6903 pos += 2; 6904 6905 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6906 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6907 pos += 3; 6908 } 6909 6910 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6911 map_size = 1; 6912 else 6913 map_size = 2; 6914 6915 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6916 * not advertise a TID-to-link mapping that does not map all TIDs to the 6917 * same link set, reject frame if not all links have mapping 6918 */ 6919 if (link_map_presence != 0xff) { 6920 sdata_info(sdata, 6921 "Invalid advertised T2L mapping presence indicator\n"); 6922 return -EINVAL; 6923 } 6924 6925 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6926 if (!ttlm_info->map) { 6927 sdata_info(sdata, 6928 "Invalid advertised T2L map for TID 0\n"); 6929 return -EINVAL; 6930 } 6931 6932 pos += map_size; 6933 6934 for (tid = 1; tid < 8; tid++) { 6935 u16 map = ieee80211_get_ttlm(map_size, pos); 6936 6937 if (map != ttlm_info->map) { 6938 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6939 tid); 6940 return -EINVAL; 6941 } 6942 6943 pos += map_size; 6944 } 6945 return 0; 6946 } 6947 6948 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6949 struct ieee802_11_elems *elems, 6950 u64 beacon_ts) 6951 { 6952 u8 i; 6953 int ret; 6954 6955 if (!ieee80211_vif_is_mld(&sdata->vif)) 6956 return; 6957 6958 if (!elems->ttlm_num) { 6959 if (sdata->u.mgd.ttlm_info.switch_time) { 6960 /* if a planned TID-to-link mapping was cancelled - 6961 * abort it 6962 */ 6963 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6964 &sdata->u.mgd.ttlm_work); 6965 } else if (sdata->u.mgd.ttlm_info.active) { 6966 /* if no TID-to-link element, set to default mapping in 6967 * which all TIDs are mapped to all setup links 6968 */ 6969 ret = ieee80211_vif_set_links(sdata, 6970 sdata->vif.valid_links, 6971 0); 6972 if (ret) { 6973 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6974 return; 6975 } 6976 ieee80211_vif_cfg_change_notify(sdata, 6977 BSS_CHANGED_MLD_VALID_LINKS); 6978 } 6979 memset(&sdata->u.mgd.ttlm_info, 0, 6980 sizeof(sdata->u.mgd.ttlm_info)); 6981 return; 6982 } 6983 6984 for (i = 0; i < elems->ttlm_num; i++) { 6985 struct ieee80211_adv_ttlm_info ttlm_info; 6986 u32 res; 6987 6988 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6989 &ttlm_info); 6990 6991 if (res) { 6992 __ieee80211_disconnect(sdata); 6993 return; 6994 } 6995 6996 if (ttlm_info.switch_time) { 6997 u16 beacon_ts_tu, st_tu, delay; 6998 u32 delay_jiffies; 6999 u64 mask; 7000 7001 /* The t2l map switch time is indicated with a partial 7002 * TSF value (bits 10 to 25), get the partial beacon TS 7003 * as well, and calc the delay to the start time. 7004 */ 7005 mask = GENMASK_ULL(25, 10); 7006 beacon_ts_tu = (beacon_ts & mask) >> 10; 7007 st_tu = ttlm_info.switch_time; 7008 delay = st_tu - beacon_ts_tu; 7009 7010 /* 7011 * If the switch time is far in the future, then it 7012 * could also be the previous switch still being 7013 * announced. 7014 * We can simply ignore it for now, if it is a future 7015 * switch the AP will continue to announce it anyway. 7016 */ 7017 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7018 return; 7019 7020 delay_jiffies = TU_TO_JIFFIES(delay); 7021 7022 /* Link switching can take time, so schedule it 7023 * 100ms before to be ready on time 7024 */ 7025 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7026 delay_jiffies -= 7027 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7028 else 7029 delay_jiffies = 0; 7030 7031 sdata->u.mgd.ttlm_info = ttlm_info; 7032 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7033 &sdata->u.mgd.ttlm_work); 7034 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7035 &sdata->u.mgd.ttlm_work, 7036 delay_jiffies); 7037 return; 7038 } 7039 } 7040 } 7041 7042 static void 7043 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7044 int reporting_link_id, 7045 struct ieee802_11_elems *elems) 7046 { 7047 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7048 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7049 const struct element *sub; 7050 const u8 *subelems; 7051 size_t subelems_len; 7052 u8 common_size; 7053 int link_id; 7054 7055 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7056 return; 7057 7058 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7059 subelems = (u8 *)elems->ml_basic + common_size; 7060 subelems_len = elems->ml_basic_len - common_size; 7061 7062 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7063 subelems, subelems_len) { 7064 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7065 struct ieee80211_link_data *link; 7066 ssize_t len; 7067 7068 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7069 sub->datalen)) 7070 continue; 7071 7072 link_id = le16_get_bits(prof->control, 7073 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7074 /* need a valid link ID, but also not our own, both AP bugs */ 7075 if (link_id == reporting_link_id || 7076 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7077 continue; 7078 7079 link = sdata_dereference(sdata->link[link_id], sdata); 7080 if (!link) 7081 continue; 7082 7083 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7084 NULL, 0, 7085 IEEE80211_MLE_SUBELEM_FRAGMENT); 7086 if (WARN_ON(len < 0)) 7087 continue; 7088 7089 sta_profiles[link_id] = sub; 7090 sta_profiles_len[link_id] = len; 7091 } 7092 7093 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7094 struct ieee80211_mle_per_sta_profile *prof; 7095 struct ieee802_11_elems *prof_elems; 7096 struct ieee80211_link_data *link; 7097 ssize_t len; 7098 7099 if (link_id == reporting_link_id) 7100 continue; 7101 7102 link = sdata_dereference(sdata->link[link_id], sdata); 7103 if (!link) 7104 continue; 7105 7106 if (!sta_profiles[link_id]) { 7107 prof_elems = NULL; 7108 goto handle; 7109 } 7110 7111 /* we can defragment in-place, won't use the buffer again */ 7112 len = cfg80211_defragment_element(sta_profiles[link_id], 7113 subelems, subelems_len, 7114 (void *)sta_profiles[link_id], 7115 sta_profiles_len[link_id], 7116 IEEE80211_MLE_SUBELEM_FRAGMENT); 7117 if (WARN_ON(len != sta_profiles_len[link_id])) 7118 continue; 7119 7120 prof = (void *)sta_profiles[link_id]; 7121 prof_elems = ieee802_11_parse_elems(prof->variable + 7122 (prof->sta_info_len - 1), 7123 len - 7124 (prof->sta_info_len - 1), 7125 false, NULL); 7126 7127 /* memory allocation failed - let's hope that's transient */ 7128 if (!prof_elems) 7129 continue; 7130 7131 handle: 7132 /* 7133 * FIXME: the timings here are obviously incorrect, 7134 * but only older Intel drivers seem to care, and 7135 * those don't have MLO. If you really need this, 7136 * the problem is having to calculate it with the 7137 * TSF offset etc. The device_timestamp is still 7138 * correct, of course. 7139 */ 7140 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7141 IEEE80211_CSA_SOURCE_OTHER_LINK); 7142 kfree(prof_elems); 7143 } 7144 } 7145 7146 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7147 const struct ieee802_11_elems *elems) 7148 { 7149 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7150 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7151 7152 if (!elems->ssid) 7153 return false; 7154 7155 /* hidden SSID: zero length */ 7156 if (elems->ssid_len == 0) 7157 return false; 7158 7159 if (elems->ssid_len != cfg->ssid_len) 7160 return true; 7161 7162 /* hidden SSID: zeroed out */ 7163 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7164 return false; 7165 7166 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7167 } 7168 7169 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7170 struct ieee80211_hdr *hdr, size_t len, 7171 struct ieee80211_rx_status *rx_status) 7172 { 7173 struct ieee80211_sub_if_data *sdata = link->sdata; 7174 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7175 struct ieee80211_bss_conf *bss_conf = link->conf; 7176 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7177 struct ieee80211_mgmt *mgmt = (void *) hdr; 7178 size_t baselen; 7179 struct ieee802_11_elems *elems; 7180 struct ieee80211_local *local = sdata->local; 7181 struct ieee80211_chanctx_conf *chanctx_conf; 7182 struct ieee80211_supported_band *sband; 7183 struct ieee80211_channel *chan; 7184 struct link_sta_info *link_sta; 7185 struct sta_info *sta; 7186 u64 changed = 0; 7187 bool erp_valid; 7188 u8 erp_value = 0; 7189 u32 ncrc = 0; 7190 u8 *bssid, *variable = mgmt->u.beacon.variable; 7191 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7192 struct ieee80211_elems_parse_params parse_params = { 7193 .mode = link->u.mgd.conn.mode, 7194 .link_id = -1, 7195 .from_ap = true, 7196 }; 7197 7198 lockdep_assert_wiphy(local->hw.wiphy); 7199 7200 /* Process beacon from the current BSS */ 7201 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7202 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7203 struct ieee80211_ext *ext = (void *) mgmt; 7204 7205 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 7206 variable = ext->u.s1g_short_beacon.variable; 7207 else 7208 variable = ext->u.s1g_beacon.variable; 7209 } 7210 7211 baselen = (u8 *) variable - (u8 *) mgmt; 7212 if (baselen > len) 7213 return; 7214 7215 parse_params.start = variable; 7216 parse_params.len = len - baselen; 7217 7218 rcu_read_lock(); 7219 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7220 if (!chanctx_conf) { 7221 rcu_read_unlock(); 7222 return; 7223 } 7224 7225 if (ieee80211_rx_status_to_khz(rx_status) != 7226 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 7227 rcu_read_unlock(); 7228 return; 7229 } 7230 chan = chanctx_conf->def.chan; 7231 rcu_read_unlock(); 7232 7233 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7234 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7235 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7236 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7237 elems = ieee802_11_parse_elems_full(&parse_params); 7238 if (!elems) 7239 return; 7240 7241 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7242 7243 if (elems->dtim_period) 7244 link->u.mgd.dtim_period = elems->dtim_period; 7245 link->u.mgd.have_beacon = true; 7246 ifmgd->assoc_data->need_beacon = false; 7247 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7248 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7249 bss_conf->sync_tsf = 7250 le64_to_cpu(mgmt->u.beacon.timestamp); 7251 bss_conf->sync_device_ts = 7252 rx_status->device_timestamp; 7253 bss_conf->sync_dtim_count = elems->dtim_count; 7254 } 7255 7256 if (elems->mbssid_config_ie) 7257 bss_conf->profile_periodicity = 7258 elems->mbssid_config_ie->profile_periodicity; 7259 else 7260 bss_conf->profile_periodicity = 0; 7261 7262 if (elems->ext_capab_len >= 11 && 7263 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7264 bss_conf->ema_ap = true; 7265 else 7266 bss_conf->ema_ap = false; 7267 7268 /* continue assoc process */ 7269 ifmgd->assoc_data->timeout = jiffies; 7270 ifmgd->assoc_data->timeout_started = true; 7271 run_again(sdata, ifmgd->assoc_data->timeout); 7272 kfree(elems); 7273 return; 7274 } 7275 7276 if (!ifmgd->associated || 7277 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7278 return; 7279 bssid = link->u.mgd.bssid; 7280 7281 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7282 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7283 local, rx_status); 7284 7285 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7286 mlme_dbg_ratelimited(sdata, 7287 "cancelling AP probe due to a received beacon\n"); 7288 ieee80211_reset_ap_probe(sdata); 7289 } 7290 7291 /* 7292 * Push the beacon loss detection into the future since 7293 * we are processing a beacon from the AP just now. 7294 */ 7295 ieee80211_sta_reset_beacon_monitor(sdata); 7296 7297 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7298 * element (which carries the beacon interval). Don't forget to add a 7299 * bit to care_about_ies[] above if mac80211 is interested in a 7300 * changing S1G element. 7301 */ 7302 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7303 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7304 parse_params.bss = bss_conf->bss; 7305 parse_params.filter = care_about_ies; 7306 parse_params.crc = ncrc; 7307 elems = ieee802_11_parse_elems_full(&parse_params); 7308 if (!elems) 7309 return; 7310 7311 if (rx_status->flag & RX_FLAG_DECRYPTED && 7312 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7313 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7314 sdata->vif.cfg.ap_addr); 7315 __ieee80211_disconnect(sdata); 7316 return; 7317 } 7318 7319 ncrc = elems->crc; 7320 7321 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7322 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7323 if (local->hw.conf.dynamic_ps_timeout > 0) { 7324 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7325 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7326 ieee80211_hw_config(local, 7327 IEEE80211_CONF_CHANGE_PS); 7328 } 7329 ieee80211_send_nullfunc(local, sdata, false); 7330 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7331 local->pspolling = true; 7332 7333 /* 7334 * Here is assumed that the driver will be 7335 * able to send ps-poll frame and receive a 7336 * response even though power save mode is 7337 * enabled, but some drivers might require 7338 * to disable power save here. This needs 7339 * to be investigated. 7340 */ 7341 ieee80211_send_pspoll(local, sdata); 7342 } 7343 } 7344 7345 if (sdata->vif.p2p || 7346 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7347 struct ieee80211_p2p_noa_attr noa = {}; 7348 int ret; 7349 7350 ret = cfg80211_get_p2p_attr(variable, 7351 len - baselen, 7352 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7353 (u8 *) &noa, sizeof(noa)); 7354 if (ret >= 2) { 7355 if (link->u.mgd.p2p_noa_index != noa.index) { 7356 /* valid noa_attr and index changed */ 7357 link->u.mgd.p2p_noa_index = noa.index; 7358 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7359 changed |= BSS_CHANGED_P2P_PS; 7360 /* 7361 * make sure we update all information, the CRC 7362 * mechanism doesn't look at P2P attributes. 7363 */ 7364 link->u.mgd.beacon_crc_valid = false; 7365 } 7366 } else if (link->u.mgd.p2p_noa_index != -1) { 7367 /* noa_attr not found and we had valid noa_attr before */ 7368 link->u.mgd.p2p_noa_index = -1; 7369 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7370 changed |= BSS_CHANGED_P2P_PS; 7371 link->u.mgd.beacon_crc_valid = false; 7372 } 7373 } 7374 7375 /* 7376 * Update beacon timing and dtim count on every beacon appearance. This 7377 * will allow the driver to use the most updated values. Do it before 7378 * comparing this one with last received beacon. 7379 * IMPORTANT: These parameters would possibly be out of sync by the time 7380 * the driver will use them. The synchronized view is currently 7381 * guaranteed only in certain callbacks. 7382 */ 7383 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7384 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7385 bss_conf->sync_tsf = 7386 le64_to_cpu(mgmt->u.beacon.timestamp); 7387 bss_conf->sync_device_ts = 7388 rx_status->device_timestamp; 7389 bss_conf->sync_dtim_count = elems->dtim_count; 7390 } 7391 7392 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7393 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 7394 goto free; 7395 link->u.mgd.beacon_crc = ncrc; 7396 link->u.mgd.beacon_crc_valid = true; 7397 7398 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7399 7400 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7401 rx_status->device_timestamp, 7402 elems, elems, 7403 IEEE80211_CSA_SOURCE_BEACON); 7404 7405 /* note that after this elems->ml_basic can no longer be used fully */ 7406 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7407 7408 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7409 7410 if (!sdata->u.mgd.epcs.enabled && 7411 !link->u.mgd.disable_wmm_tracking && 7412 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7413 elems->wmm_param_len, 7414 elems->mu_edca_param_set)) 7415 changed |= BSS_CHANGED_QOS; 7416 7417 /* 7418 * If we haven't had a beacon before, tell the driver about the 7419 * DTIM period (and beacon timing if desired) now. 7420 */ 7421 if (!link->u.mgd.have_beacon) { 7422 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7423 bss_conf->dtim_period = elems->dtim_period ?: 1; 7424 7425 changed |= BSS_CHANGED_BEACON_INFO; 7426 link->u.mgd.have_beacon = true; 7427 7428 ieee80211_recalc_ps(local); 7429 7430 ieee80211_recalc_ps_vif(sdata); 7431 } 7432 7433 if (elems->erp_info) { 7434 erp_valid = true; 7435 erp_value = elems->erp_info[0]; 7436 } else { 7437 erp_valid = false; 7438 } 7439 7440 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7441 changed |= ieee80211_handle_bss_capability(link, 7442 le16_to_cpu(mgmt->u.beacon.capab_info), 7443 erp_valid, erp_value); 7444 7445 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7446 if (WARN_ON(!sta)) { 7447 goto free; 7448 } 7449 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7450 lockdep_is_held(&local->hw.wiphy->mtx)); 7451 if (WARN_ON(!link_sta)) { 7452 goto free; 7453 } 7454 7455 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7456 goto free; 7457 7458 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7459 7460 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7461 7462 if (ieee80211_config_bw(link, elems, true, &changed, "beacon")) { 7463 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7464 WLAN_REASON_DEAUTH_LEAVING, 7465 true, deauth_buf); 7466 ieee80211_report_disconnect(sdata, deauth_buf, 7467 sizeof(deauth_buf), true, 7468 WLAN_REASON_DEAUTH_LEAVING, 7469 false); 7470 goto free; 7471 } 7472 7473 if (elems->opmode_notif) 7474 ieee80211_vht_handle_opmode(sdata, link_sta, 7475 *elems->opmode_notif, 7476 rx_status->band); 7477 7478 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7479 elems->country_elem, 7480 elems->country_elem_len, 7481 elems->pwr_constr_elem, 7482 elems->cisco_dtpc_elem); 7483 7484 ieee80211_ml_reconfiguration(sdata, elems); 7485 ieee80211_process_adv_ttlm(sdata, elems, 7486 le64_to_cpu(mgmt->u.beacon.timestamp)); 7487 7488 ieee80211_link_info_change_notify(sdata, link, changed); 7489 free: 7490 kfree(elems); 7491 } 7492 7493 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7494 struct ieee80211_neg_ttlm neg_ttlm) 7495 { 7496 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7497 u8 i; 7498 7499 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7500 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7501 7502 /* If there is an active TTLM, unset previously suspended links */ 7503 if (sdata->vif.neg_ttlm.valid) 7504 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7505 7506 /* exclude links that are already disabled by advertised TTLM */ 7507 new_active_links = 7508 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7509 new_suspended_links = 7510 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7511 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7512 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7513 new_dormant_links, new_suspended_links)) 7514 return; 7515 7516 sdata->vif.neg_ttlm = neg_ttlm; 7517 sdata->vif.neg_ttlm.valid = true; 7518 } 7519 7520 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7521 struct wiphy_work *work) 7522 { 7523 struct ieee80211_sub_if_data *sdata = 7524 container_of(work, struct ieee80211_sub_if_data, 7525 u.mgd.neg_ttlm_timeout_work.work); 7526 7527 sdata_info(sdata, 7528 "No negotiated TTLM response from AP, disconnecting.\n"); 7529 7530 __ieee80211_disconnect(sdata); 7531 } 7532 7533 static void 7534 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7535 struct ieee80211_neg_ttlm *neg_ttlm) 7536 { 7537 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7538 7539 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7540 sizeof(neg_ttlm->downlink))) { 7541 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7542 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7543 } else { 7544 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7545 } 7546 7547 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7548 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7549 __le16 map; 7550 7551 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7552 7553 pos = skb_put(skb, len + 2); 7554 *pos++ = WLAN_EID_EXTENSION; 7555 len_pos = pos++; 7556 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7557 *pos++ = direction[i]; 7558 map_ind_pos = pos++; 7559 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7560 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7561 cpu_to_le16(neg_ttlm->uplink[tid]) : 7562 cpu_to_le16(neg_ttlm->downlink[tid]); 7563 if (!map) 7564 continue; 7565 7566 len += 2; 7567 map_ind |= BIT(tid); 7568 skb_put_data(skb, &map, sizeof(map)); 7569 } 7570 7571 *map_ind_pos = map_ind; 7572 *len_pos = len; 7573 7574 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7575 break; 7576 } 7577 } 7578 7579 static void 7580 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7581 struct ieee80211_neg_ttlm *neg_ttlm, 7582 u8 dialog_token) 7583 { 7584 struct ieee80211_local *local = sdata->local; 7585 struct ieee80211_mgmt *mgmt; 7586 struct sk_buff *skb; 7587 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7588 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7589 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7590 7591 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7592 if (!skb) 7593 return; 7594 7595 skb_reserve(skb, local->tx_headroom); 7596 mgmt = skb_put_zero(skb, hdr_len); 7597 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7598 IEEE80211_STYPE_ACTION); 7599 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7600 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7601 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7602 7603 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7604 mgmt->u.action.u.ttlm_req.action_code = 7605 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7606 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7607 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7608 ieee80211_tx_skb(sdata, skb); 7609 } 7610 7611 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7612 struct cfg80211_ttlm_params *params) 7613 { 7614 struct ieee80211_neg_ttlm neg_ttlm = {}; 7615 u8 i; 7616 7617 if (!ieee80211_vif_is_mld(&sdata->vif) || 7618 !(sdata->vif.cfg.mld_capa_op & 7619 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7620 return -EINVAL; 7621 7622 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7623 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7624 (params->ulink[i] & ~sdata->vif.valid_links)) 7625 return -EINVAL; 7626 7627 neg_ttlm.downlink[i] = params->dlink[i]; 7628 neg_ttlm.uplink[i] = params->ulink[i]; 7629 } 7630 7631 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7632 NEG_TTLM_RES_ACCEPT) 7633 return -EINVAL; 7634 7635 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7636 sdata->u.mgd.dialog_token_alloc++; 7637 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7638 sdata->u.mgd.dialog_token_alloc); 7639 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7640 &sdata->u.mgd.neg_ttlm_timeout_work); 7641 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7642 &sdata->u.mgd.neg_ttlm_timeout_work, 7643 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7644 return 0; 7645 } 7646 7647 static void 7648 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7649 enum ieee80211_neg_ttlm_res ttlm_res, 7650 u8 dialog_token, 7651 struct ieee80211_neg_ttlm *neg_ttlm) 7652 { 7653 struct ieee80211_local *local = sdata->local; 7654 struct ieee80211_mgmt *mgmt; 7655 struct sk_buff *skb; 7656 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7657 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7658 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7659 7660 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7661 if (!skb) 7662 return; 7663 7664 skb_reserve(skb, local->tx_headroom); 7665 mgmt = skb_put_zero(skb, hdr_len); 7666 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7667 IEEE80211_STYPE_ACTION); 7668 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7669 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7670 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7671 7672 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7673 mgmt->u.action.u.ttlm_res.action_code = 7674 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7675 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7676 switch (ttlm_res) { 7677 default: 7678 WARN_ON(1); 7679 fallthrough; 7680 case NEG_TTLM_RES_REJECT: 7681 mgmt->u.action.u.ttlm_res.status_code = 7682 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7683 break; 7684 case NEG_TTLM_RES_ACCEPT: 7685 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7686 break; 7687 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7688 mgmt->u.action.u.ttlm_res.status_code = 7689 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7690 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7691 break; 7692 } 7693 7694 ieee80211_tx_skb(sdata, skb); 7695 } 7696 7697 static int 7698 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7699 const struct ieee80211_ttlm_elem *ttlm, 7700 struct ieee80211_neg_ttlm *neg_ttlm, 7701 u8 *direction) 7702 { 7703 u8 control, link_map_presence, map_size, tid; 7704 u8 *pos; 7705 7706 /* The element size was already validated in 7707 * ieee80211_tid_to_link_map_size_ok() 7708 */ 7709 pos = (void *)ttlm->optional; 7710 7711 control = ttlm->control; 7712 7713 /* mapping switch time and expected duration fields are not expected 7714 * in case of negotiated TTLM 7715 */ 7716 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7717 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7718 mlme_dbg(sdata, 7719 "Invalid TTLM element in negotiated TTLM request\n"); 7720 return -EINVAL; 7721 } 7722 7723 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7724 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7725 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7726 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7727 } 7728 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7729 return 0; 7730 } 7731 7732 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7733 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7734 *direction != IEEE80211_TTLM_DIRECTION_UP && 7735 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7736 return -EINVAL; 7737 7738 link_map_presence = *pos; 7739 pos++; 7740 7741 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7742 map_size = 1; 7743 else 7744 map_size = 2; 7745 7746 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7747 u16 map; 7748 7749 if (link_map_presence & BIT(tid)) { 7750 map = ieee80211_get_ttlm(map_size, pos); 7751 if (!map) { 7752 mlme_dbg(sdata, 7753 "No active links for TID %d", tid); 7754 return -EINVAL; 7755 } 7756 } else { 7757 map = 0; 7758 } 7759 7760 switch (*direction) { 7761 case IEEE80211_TTLM_DIRECTION_BOTH: 7762 neg_ttlm->downlink[tid] = map; 7763 neg_ttlm->uplink[tid] = map; 7764 break; 7765 case IEEE80211_TTLM_DIRECTION_DOWN: 7766 neg_ttlm->downlink[tid] = map; 7767 break; 7768 case IEEE80211_TTLM_DIRECTION_UP: 7769 neg_ttlm->uplink[tid] = map; 7770 break; 7771 default: 7772 return -EINVAL; 7773 } 7774 pos += map_size; 7775 } 7776 return 0; 7777 } 7778 7779 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7780 struct ieee80211_mgmt *mgmt, size_t len) 7781 { 7782 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7783 size_t ies_len; 7784 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7785 struct ieee802_11_elems *elems = NULL; 7786 struct ieee80211_neg_ttlm neg_ttlm = {}; 7787 7788 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7789 7790 if (!ieee80211_vif_is_mld(&sdata->vif)) 7791 return; 7792 7793 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7794 ies_len = len - offsetof(struct ieee80211_mgmt, 7795 u.action.u.ttlm_req.variable); 7796 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7797 ies_len, true, NULL); 7798 if (!elems) { 7799 ttlm_res = NEG_TTLM_RES_REJECT; 7800 goto out; 7801 } 7802 7803 for (i = 0; i < elems->ttlm_num; i++) { 7804 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7805 &neg_ttlm, &direction[i]) || 7806 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7807 elems->ttlm_num != 1)) { 7808 ttlm_res = NEG_TTLM_RES_REJECT; 7809 goto out; 7810 } 7811 } 7812 7813 if (!elems->ttlm_num || 7814 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7815 ttlm_res = NEG_TTLM_RES_REJECT; 7816 goto out; 7817 } 7818 7819 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7820 if ((neg_ttlm.downlink[i] && 7821 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7822 (neg_ttlm.uplink[i] && 7823 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7824 ttlm_res = NEG_TTLM_RES_REJECT; 7825 goto out; 7826 } 7827 } 7828 7829 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7830 7831 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7832 goto out; 7833 7834 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7835 out: 7836 kfree(elems); 7837 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7838 } 7839 7840 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7841 struct ieee80211_mgmt *mgmt, size_t len) 7842 { 7843 if (!ieee80211_vif_is_mld(&sdata->vif) || 7844 mgmt->u.action.u.ttlm_req.dialog_token != 7845 sdata->u.mgd.dialog_token_alloc) 7846 return; 7847 7848 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7849 &sdata->u.mgd.neg_ttlm_timeout_work); 7850 7851 /* MLD station sends a TID to link mapping request, mainly to handle 7852 * BTM (BSS transition management) request, in which case it needs to 7853 * restrict the active links set. 7854 * In this case it's not expected that the MLD AP will reject the 7855 * negotiated TTLM request. 7856 * This can be better implemented in the future, to handle request 7857 * rejections. 7858 */ 7859 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7860 __ieee80211_disconnect(sdata); 7861 } 7862 7863 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 7864 { 7865 u16 new_dormant_links; 7866 7867 if (!sdata->vif.neg_ttlm.valid) 7868 return; 7869 7870 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7871 new_dormant_links = 7872 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7873 sdata->vif.suspended_links = 0; 7874 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7875 new_dormant_links); 7876 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7877 BSS_CHANGED_MLD_VALID_LINKS); 7878 } 7879 7880 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7881 struct wiphy_work *work) 7882 { 7883 struct ieee80211_sub_if_data *sdata = 7884 container_of(work, struct ieee80211_sub_if_data, 7885 u.mgd.teardown_ttlm_work); 7886 7887 ieee80211_process_ttlm_teardown(sdata); 7888 } 7889 7890 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7891 { 7892 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7893 struct ieee80211_local *local = sdata->local; 7894 struct ieee80211_mgmt *mgmt; 7895 struct sk_buff *skb; 7896 int frame_len = offsetofend(struct ieee80211_mgmt, 7897 u.action.u.ttlm_tear_down); 7898 struct ieee80211_tx_info *info; 7899 7900 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7901 if (!skb) 7902 return; 7903 7904 skb_reserve(skb, local->hw.extra_tx_headroom); 7905 mgmt = skb_put_zero(skb, frame_len); 7906 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7907 IEEE80211_STYPE_ACTION); 7908 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7909 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7910 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7911 7912 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7913 mgmt->u.action.u.ttlm_tear_down.action_code = 7914 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7915 7916 info = IEEE80211_SKB_CB(skb); 7917 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7918 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7919 ieee80211_tx_skb(sdata, skb); 7920 } 7921 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7922 7923 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7924 struct sk_buff *skb) 7925 { 7926 struct ieee80211_link_data *link = &sdata->deflink; 7927 struct ieee80211_rx_status *rx_status; 7928 struct ieee80211_hdr *hdr; 7929 u16 fc; 7930 7931 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7932 7933 rx_status = (struct ieee80211_rx_status *) skb->cb; 7934 hdr = (struct ieee80211_hdr *) skb->data; 7935 fc = le16_to_cpu(hdr->frame_control); 7936 7937 switch (fc & IEEE80211_FCTL_STYPE) { 7938 case IEEE80211_STYPE_S1G_BEACON: 7939 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7940 break; 7941 } 7942 } 7943 7944 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7945 struct sk_buff *skb) 7946 { 7947 struct ieee80211_link_data *link = &sdata->deflink; 7948 struct ieee80211_rx_status *rx_status; 7949 struct ieee802_11_elems *elems; 7950 struct ieee80211_mgmt *mgmt; 7951 u16 fc; 7952 int ies_len; 7953 7954 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7955 7956 rx_status = (struct ieee80211_rx_status *) skb->cb; 7957 mgmt = (struct ieee80211_mgmt *) skb->data; 7958 fc = le16_to_cpu(mgmt->frame_control); 7959 7960 if (rx_status->link_valid) { 7961 link = sdata_dereference(sdata->link[rx_status->link_id], 7962 sdata); 7963 if (!link) 7964 return; 7965 } 7966 7967 switch (fc & IEEE80211_FCTL_STYPE) { 7968 case IEEE80211_STYPE_BEACON: 7969 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7970 skb->len, rx_status); 7971 break; 7972 case IEEE80211_STYPE_PROBE_RESP: 7973 ieee80211_rx_mgmt_probe_resp(link, skb); 7974 break; 7975 case IEEE80211_STYPE_AUTH: 7976 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7977 break; 7978 case IEEE80211_STYPE_DEAUTH: 7979 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7980 break; 7981 case IEEE80211_STYPE_DISASSOC: 7982 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7983 break; 7984 case IEEE80211_STYPE_ASSOC_RESP: 7985 case IEEE80211_STYPE_REASSOC_RESP: 7986 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7987 break; 7988 case IEEE80211_STYPE_ACTION: 7989 if (!sdata->u.mgd.associated || 7990 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7991 break; 7992 7993 switch (mgmt->u.action.category) { 7994 case WLAN_CATEGORY_SPECTRUM_MGMT: 7995 ies_len = skb->len - 7996 offsetof(struct ieee80211_mgmt, 7997 u.action.u.chan_switch.variable); 7998 7999 if (ies_len < 0) 8000 break; 8001 8002 /* CSA IE cannot be overridden, no need for BSSID */ 8003 elems = ieee802_11_parse_elems( 8004 mgmt->u.action.u.chan_switch.variable, 8005 ies_len, true, NULL); 8006 8007 if (elems && !elems->parse_error) { 8008 enum ieee80211_csa_source src = 8009 IEEE80211_CSA_SOURCE_PROT_ACTION; 8010 8011 ieee80211_sta_process_chanswitch(link, 8012 rx_status->mactime, 8013 rx_status->device_timestamp, 8014 elems, elems, 8015 src); 8016 } 8017 kfree(elems); 8018 break; 8019 case WLAN_CATEGORY_PUBLIC: 8020 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8021 ies_len = skb->len - 8022 offsetof(struct ieee80211_mgmt, 8023 u.action.u.ext_chan_switch.variable); 8024 8025 if (ies_len < 0) 8026 break; 8027 8028 /* 8029 * extended CSA IE can't be overridden, no need for 8030 * BSSID 8031 */ 8032 elems = ieee802_11_parse_elems( 8033 mgmt->u.action.u.ext_chan_switch.variable, 8034 ies_len, true, NULL); 8035 8036 if (elems && !elems->parse_error) { 8037 enum ieee80211_csa_source src; 8038 8039 if (mgmt->u.action.category == 8040 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8041 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8042 else 8043 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8044 8045 /* for the handling code pretend it was an IE */ 8046 elems->ext_chansw_ie = 8047 &mgmt->u.action.u.ext_chan_switch.data; 8048 8049 ieee80211_sta_process_chanswitch(link, 8050 rx_status->mactime, 8051 rx_status->device_timestamp, 8052 elems, elems, 8053 src); 8054 } 8055 8056 kfree(elems); 8057 break; 8058 } 8059 break; 8060 } 8061 } 8062 8063 static void ieee80211_sta_timer(struct timer_list *t) 8064 { 8065 struct ieee80211_sub_if_data *sdata = 8066 from_timer(sdata, t, u.mgd.timer); 8067 8068 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8069 } 8070 8071 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8072 u8 reason, bool tx) 8073 { 8074 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8075 8076 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8077 tx, frame_buf); 8078 8079 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8080 reason, false); 8081 } 8082 8083 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8084 { 8085 struct ieee80211_local *local = sdata->local; 8086 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8087 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8088 u32 tx_flags = 0; 8089 u16 trans = 1; 8090 u16 status = 0; 8091 struct ieee80211_prep_tx_info info = { 8092 .subtype = IEEE80211_STYPE_AUTH, 8093 }; 8094 8095 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8096 8097 if (WARN_ON_ONCE(!auth_data)) 8098 return -EINVAL; 8099 8100 auth_data->tries++; 8101 8102 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8103 sdata_info(sdata, "authentication with %pM timed out\n", 8104 auth_data->ap_addr); 8105 8106 /* 8107 * Most likely AP is not in the range so remove the 8108 * bss struct for that AP. 8109 */ 8110 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8111 8112 return -ETIMEDOUT; 8113 } 8114 8115 if (auth_data->algorithm == WLAN_AUTH_SAE) 8116 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8117 8118 info.link_id = auth_data->link_id; 8119 drv_mgd_prepare_tx(local, sdata, &info); 8120 8121 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8122 auth_data->ap_addr, auth_data->tries, 8123 IEEE80211_AUTH_MAX_TRIES); 8124 8125 auth_data->expected_transaction = 2; 8126 8127 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8128 trans = auth_data->sae_trans; 8129 status = auth_data->sae_status; 8130 auth_data->expected_transaction = trans; 8131 } 8132 8133 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8134 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8135 IEEE80211_TX_INTFL_MLME_CONN_TX; 8136 8137 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8138 auth_data->data, auth_data->data_len, 8139 auth_data->ap_addr, auth_data->ap_addr, 8140 NULL, 0, 0, tx_flags); 8141 8142 if (tx_flags == 0) { 8143 if (auth_data->algorithm == WLAN_AUTH_SAE) 8144 auth_data->timeout = jiffies + 8145 IEEE80211_AUTH_TIMEOUT_SAE; 8146 else 8147 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8148 } else { 8149 auth_data->timeout = 8150 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8151 } 8152 8153 auth_data->timeout_started = true; 8154 run_again(sdata, auth_data->timeout); 8155 8156 return 0; 8157 } 8158 8159 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8160 { 8161 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8162 struct ieee80211_local *local = sdata->local; 8163 int ret; 8164 8165 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8166 8167 assoc_data->tries++; 8168 assoc_data->comeback = false; 8169 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8170 sdata_info(sdata, "association with %pM timed out\n", 8171 assoc_data->ap_addr); 8172 8173 /* 8174 * Most likely AP is not in the range so remove the 8175 * bss struct for that AP. 8176 */ 8177 cfg80211_unlink_bss(local->hw.wiphy, 8178 assoc_data->link[assoc_data->assoc_link_id].bss); 8179 8180 return -ETIMEDOUT; 8181 } 8182 8183 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8184 assoc_data->ap_addr, assoc_data->tries, 8185 IEEE80211_ASSOC_MAX_TRIES); 8186 ret = ieee80211_send_assoc(sdata); 8187 if (ret) 8188 return ret; 8189 8190 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8191 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8192 assoc_data->timeout_started = true; 8193 run_again(sdata, assoc_data->timeout); 8194 } else { 8195 assoc_data->timeout = 8196 round_jiffies_up(jiffies + 8197 IEEE80211_ASSOC_TIMEOUT_LONG); 8198 assoc_data->timeout_started = true; 8199 run_again(sdata, assoc_data->timeout); 8200 } 8201 8202 return 0; 8203 } 8204 8205 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8206 __le16 fc, bool acked) 8207 { 8208 struct ieee80211_local *local = sdata->local; 8209 8210 sdata->u.mgd.status_fc = fc; 8211 sdata->u.mgd.status_acked = acked; 8212 sdata->u.mgd.status_received = true; 8213 8214 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8215 } 8216 8217 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8218 { 8219 struct ieee80211_local *local = sdata->local; 8220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8221 8222 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8223 8224 if (ifmgd->status_received) { 8225 __le16 fc = ifmgd->status_fc; 8226 bool status_acked = ifmgd->status_acked; 8227 8228 ifmgd->status_received = false; 8229 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8230 if (status_acked) { 8231 if (ifmgd->auth_data->algorithm == 8232 WLAN_AUTH_SAE) 8233 ifmgd->auth_data->timeout = 8234 jiffies + 8235 IEEE80211_AUTH_TIMEOUT_SAE; 8236 else 8237 ifmgd->auth_data->timeout = 8238 jiffies + 8239 IEEE80211_AUTH_TIMEOUT_SHORT; 8240 run_again(sdata, ifmgd->auth_data->timeout); 8241 } else { 8242 ifmgd->auth_data->timeout = jiffies - 1; 8243 } 8244 ifmgd->auth_data->timeout_started = true; 8245 } else if (ifmgd->assoc_data && 8246 !ifmgd->assoc_data->comeback && 8247 (ieee80211_is_assoc_req(fc) || 8248 ieee80211_is_reassoc_req(fc))) { 8249 /* 8250 * Update association timeout based on the TX status 8251 * for the (Re)Association Request frame. Skip this if 8252 * we have already processed a (Re)Association Response 8253 * frame that indicated need for association comeback 8254 * at a specific time in the future. This could happen 8255 * if the TX status information is delayed enough for 8256 * the response to be received and processed first. 8257 */ 8258 if (status_acked) { 8259 ifmgd->assoc_data->timeout = 8260 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8261 run_again(sdata, ifmgd->assoc_data->timeout); 8262 } else { 8263 ifmgd->assoc_data->timeout = jiffies - 1; 8264 } 8265 ifmgd->assoc_data->timeout_started = true; 8266 } 8267 } 8268 8269 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8270 time_after(jiffies, ifmgd->auth_data->timeout)) { 8271 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8272 /* 8273 * ok ... we waited for assoc or continuation but 8274 * userspace didn't do it, so kill the auth data 8275 */ 8276 ieee80211_destroy_auth_data(sdata, false); 8277 } else if (ieee80211_auth(sdata)) { 8278 u8 ap_addr[ETH_ALEN]; 8279 struct ieee80211_event event = { 8280 .type = MLME_EVENT, 8281 .u.mlme.data = AUTH_EVENT, 8282 .u.mlme.status = MLME_TIMEOUT, 8283 }; 8284 8285 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8286 8287 ieee80211_destroy_auth_data(sdata, false); 8288 8289 cfg80211_auth_timeout(sdata->dev, ap_addr); 8290 drv_event_callback(sdata->local, sdata, &event); 8291 } 8292 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8293 run_again(sdata, ifmgd->auth_data->timeout); 8294 8295 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8296 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8297 if ((ifmgd->assoc_data->need_beacon && 8298 !sdata->deflink.u.mgd.have_beacon) || 8299 ieee80211_do_assoc(sdata)) { 8300 struct ieee80211_event event = { 8301 .type = MLME_EVENT, 8302 .u.mlme.data = ASSOC_EVENT, 8303 .u.mlme.status = MLME_TIMEOUT, 8304 }; 8305 8306 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8307 drv_event_callback(sdata->local, sdata, &event); 8308 } 8309 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8310 run_again(sdata, ifmgd->assoc_data->timeout); 8311 8312 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8313 ifmgd->associated) { 8314 u8 *bssid = sdata->deflink.u.mgd.bssid; 8315 int max_tries; 8316 8317 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8318 max_tries = max_nullfunc_tries; 8319 else 8320 max_tries = max_probe_tries; 8321 8322 /* ACK received for nullfunc probing frame */ 8323 if (!ifmgd->probe_send_count) 8324 ieee80211_reset_ap_probe(sdata); 8325 else if (ifmgd->nullfunc_failed) { 8326 if (ifmgd->probe_send_count < max_tries) { 8327 mlme_dbg(sdata, 8328 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8329 bssid, ifmgd->probe_send_count, 8330 max_tries); 8331 ieee80211_mgd_probe_ap_send(sdata); 8332 } else { 8333 mlme_dbg(sdata, 8334 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8335 bssid); 8336 ieee80211_sta_connection_lost(sdata, 8337 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8338 false); 8339 } 8340 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8341 run_again(sdata, ifmgd->probe_timeout); 8342 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8343 mlme_dbg(sdata, 8344 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8345 bssid, probe_wait_ms); 8346 ieee80211_sta_connection_lost(sdata, 8347 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8348 } else if (ifmgd->probe_send_count < max_tries) { 8349 mlme_dbg(sdata, 8350 "No probe response from AP %pM after %dms, try %d/%i\n", 8351 bssid, probe_wait_ms, 8352 ifmgd->probe_send_count, max_tries); 8353 ieee80211_mgd_probe_ap_send(sdata); 8354 } else { 8355 /* 8356 * We actually lost the connection ... or did we? 8357 * Let's make sure! 8358 */ 8359 mlme_dbg(sdata, 8360 "No probe response from AP %pM after %dms, disconnecting.\n", 8361 bssid, probe_wait_ms); 8362 8363 ieee80211_sta_connection_lost(sdata, 8364 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8365 } 8366 } 8367 } 8368 8369 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8370 { 8371 struct ieee80211_sub_if_data *sdata = 8372 from_timer(sdata, t, u.mgd.bcn_mon_timer); 8373 8374 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8375 return; 8376 8377 if (sdata->vif.bss_conf.csa_active && 8378 !sdata->deflink.u.mgd.csa.waiting_bcn) 8379 return; 8380 8381 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8382 return; 8383 8384 sdata->u.mgd.connection_loss = false; 8385 wiphy_work_queue(sdata->local->hw.wiphy, 8386 &sdata->u.mgd.beacon_connection_loss_work); 8387 } 8388 8389 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8390 { 8391 struct ieee80211_sub_if_data *sdata = 8392 from_timer(sdata, t, u.mgd.conn_mon_timer); 8393 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8394 struct ieee80211_local *local = sdata->local; 8395 struct sta_info *sta; 8396 unsigned long timeout; 8397 8398 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8399 return; 8400 8401 if (sdata->vif.bss_conf.csa_active && 8402 !sdata->deflink.u.mgd.csa.waiting_bcn) 8403 return; 8404 8405 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8406 if (!sta) 8407 return; 8408 8409 timeout = sta->deflink.status_stats.last_ack; 8410 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8411 timeout = sta->deflink.rx_stats.last_rx; 8412 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8413 8414 /* If timeout is after now, then update timer to fire at 8415 * the later date, but do not actually probe at this time. 8416 */ 8417 if (time_is_after_jiffies(timeout)) { 8418 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8419 return; 8420 } 8421 8422 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8423 } 8424 8425 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8426 struct wiphy_work *work) 8427 { 8428 struct ieee80211_sub_if_data *sdata = 8429 container_of(work, struct ieee80211_sub_if_data, 8430 u.mgd.monitor_work); 8431 8432 ieee80211_mgd_probe_ap(sdata, false); 8433 } 8434 8435 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8436 { 8437 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8438 __ieee80211_stop_poll(sdata); 8439 8440 /* let's probe the connection once */ 8441 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8442 wiphy_work_queue(sdata->local->hw.wiphy, 8443 &sdata->u.mgd.monitor_work); 8444 } 8445 } 8446 8447 #ifdef CONFIG_PM 8448 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8449 { 8450 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8451 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8452 8453 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8454 8455 if (ifmgd->auth_data || ifmgd->assoc_data) { 8456 const u8 *ap_addr = ifmgd->auth_data ? 8457 ifmgd->auth_data->ap_addr : 8458 ifmgd->assoc_data->ap_addr; 8459 8460 /* 8461 * If we are trying to authenticate / associate while suspending, 8462 * cfg80211 won't know and won't actually abort those attempts, 8463 * thus we need to do that ourselves. 8464 */ 8465 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8466 IEEE80211_STYPE_DEAUTH, 8467 WLAN_REASON_DEAUTH_LEAVING, 8468 false, frame_buf); 8469 if (ifmgd->assoc_data) 8470 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8471 if (ifmgd->auth_data) 8472 ieee80211_destroy_auth_data(sdata, false); 8473 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8474 IEEE80211_DEAUTH_FRAME_LEN, 8475 false); 8476 } 8477 8478 /* This is a bit of a hack - we should find a better and more generic 8479 * solution to this. Normally when suspending, cfg80211 will in fact 8480 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8481 * auth (not so important) or assoc (this is the problem) process. 8482 * 8483 * As a consequence, it can happen that we are in the process of both 8484 * associating and suspending, and receive an association response 8485 * after cfg80211 has checked if it needs to disconnect, but before 8486 * we actually set the flag to drop incoming frames. This will then 8487 * cause the workqueue flush to process the association response in 8488 * the suspend, resulting in a successful association just before it 8489 * tries to remove the interface from the driver, which now though 8490 * has a channel context assigned ... this results in issues. 8491 * 8492 * To work around this (for now) simply deauth here again if we're 8493 * now connected. 8494 */ 8495 if (ifmgd->associated && !sdata->local->wowlan) { 8496 u8 bssid[ETH_ALEN]; 8497 struct cfg80211_deauth_request req = { 8498 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8499 .bssid = bssid, 8500 }; 8501 8502 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8503 ieee80211_mgd_deauth(sdata, &req); 8504 } 8505 } 8506 #endif 8507 8508 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8509 { 8510 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8511 8512 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8513 8514 if (!ifmgd->associated) 8515 return; 8516 8517 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8518 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8519 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8520 ieee80211_sta_connection_lost(sdata, 8521 WLAN_REASON_UNSPECIFIED, 8522 true); 8523 return; 8524 } 8525 8526 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8527 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8528 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8529 ieee80211_sta_connection_lost(sdata, 8530 WLAN_REASON_UNSPECIFIED, 8531 true); 8532 return; 8533 } 8534 } 8535 8536 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8537 struct wiphy_work *work) 8538 { 8539 struct ieee80211_link_data *link = 8540 container_of(work, struct ieee80211_link_data, 8541 u.mgd.request_smps_work); 8542 8543 __ieee80211_request_smps_mgd(link->sdata, link, 8544 link->u.mgd.driver_smps_mode); 8545 } 8546 8547 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8548 struct wiphy_work *work) 8549 { 8550 struct ieee80211_sub_if_data *sdata = 8551 container_of(work, struct ieee80211_sub_if_data, 8552 u.mgd.reconf.wk.work); 8553 8554 if (!sdata->u.mgd.reconf.added_links && 8555 !sdata->u.mgd.reconf.removed_links) 8556 return; 8557 8558 sdata_info(sdata, 8559 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8560 sdata->u.mgd.reconf.added_links, 8561 sdata->u.mgd.reconf.removed_links); 8562 8563 __ieee80211_disconnect(sdata); 8564 } 8565 8566 /* interface setup */ 8567 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8568 { 8569 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8570 8571 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8572 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8573 ieee80211_beacon_connection_loss_work); 8574 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8575 ieee80211_csa_connection_drop_work); 8576 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8577 ieee80211_tdls_peer_del_work); 8578 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8579 ieee80211_ml_reconf_work); 8580 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8581 ieee80211_ml_sta_reconf_timeout); 8582 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8583 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8584 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8585 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8586 ieee80211_sta_handle_tspec_ac_params_wk); 8587 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8588 ieee80211_tid_to_link_map_work); 8589 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8590 ieee80211_neg_ttlm_timeout_work); 8591 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8592 ieee80211_teardown_ttlm_work); 8593 8594 ifmgd->flags = 0; 8595 ifmgd->powersave = sdata->wdev.ps; 8596 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8597 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8598 /* Setup TDLS data */ 8599 spin_lock_init(&ifmgd->teardown_lock); 8600 ifmgd->teardown_skb = NULL; 8601 ifmgd->orig_teardown_skb = NULL; 8602 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8603 } 8604 8605 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8606 struct wiphy_work *work) 8607 { 8608 struct ieee80211_link_data *link = 8609 container_of(work, struct ieee80211_link_data, 8610 u.mgd.recalc_smps); 8611 8612 ieee80211_recalc_smps(link->sdata, link); 8613 } 8614 8615 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8616 { 8617 struct ieee80211_sub_if_data *sdata = link->sdata; 8618 struct ieee80211_local *local = sdata->local; 8619 unsigned int link_id = link->link_id; 8620 8621 link->u.mgd.p2p_noa_index = -1; 8622 link->conf->bssid = link->u.mgd.bssid; 8623 link->smps_mode = IEEE80211_SMPS_OFF; 8624 8625 wiphy_work_init(&link->u.mgd.request_smps_work, 8626 ieee80211_request_smps_mgd_work); 8627 wiphy_work_init(&link->u.mgd.recalc_smps, 8628 ieee80211_recalc_smps_work); 8629 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8630 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8631 else 8632 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8633 8634 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8635 ieee80211_csa_switch_work); 8636 8637 ieee80211_clear_tpe(&link->conf->tpe); 8638 8639 if (sdata->u.mgd.assoc_data) 8640 ether_addr_copy(link->conf->addr, 8641 sdata->u.mgd.assoc_data->link[link_id].addr); 8642 else if (sdata->u.mgd.reconf.add_links_data) 8643 ether_addr_copy(link->conf->addr, 8644 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8645 else if (!is_valid_ether_addr(link->conf->addr)) 8646 eth_random_addr(link->conf->addr); 8647 } 8648 8649 /* scan finished notification */ 8650 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8651 { 8652 struct ieee80211_sub_if_data *sdata; 8653 8654 /* Restart STA timers */ 8655 rcu_read_lock(); 8656 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8657 if (ieee80211_sdata_running(sdata)) 8658 ieee80211_restart_sta_timer(sdata); 8659 } 8660 rcu_read_unlock(); 8661 } 8662 8663 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8664 struct cfg80211_bss *cbss, s8 link_id, 8665 const u8 *ap_mld_addr, bool assoc, 8666 struct ieee80211_conn_settings *conn, 8667 bool override, 8668 unsigned long *userspace_selectors) 8669 { 8670 struct ieee80211_local *local = sdata->local; 8671 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8672 struct ieee80211_bss *bss = (void *)cbss->priv; 8673 struct sta_info *new_sta = NULL; 8674 struct ieee80211_link_data *link; 8675 bool have_sta = false; 8676 bool mlo; 8677 int err; 8678 8679 if (link_id >= 0) { 8680 mlo = true; 8681 if (WARN_ON(!ap_mld_addr)) 8682 return -EINVAL; 8683 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8684 } else { 8685 if (WARN_ON(ap_mld_addr)) 8686 return -EINVAL; 8687 ap_mld_addr = cbss->bssid; 8688 err = ieee80211_vif_set_links(sdata, 0, 0); 8689 link_id = 0; 8690 mlo = false; 8691 } 8692 8693 if (err) 8694 return err; 8695 8696 link = sdata_dereference(sdata->link[link_id], sdata); 8697 if (WARN_ON(!link)) { 8698 err = -ENOLINK; 8699 goto out_err; 8700 } 8701 8702 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8703 err = -EINVAL; 8704 goto out_err; 8705 } 8706 8707 /* If a reconfig is happening, bail out */ 8708 if (local->in_reconfig) { 8709 err = -EBUSY; 8710 goto out_err; 8711 } 8712 8713 if (assoc) { 8714 rcu_read_lock(); 8715 have_sta = sta_info_get(sdata, ap_mld_addr); 8716 rcu_read_unlock(); 8717 } 8718 8719 if (!have_sta) { 8720 if (mlo) 8721 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8722 link_id, cbss->bssid, 8723 GFP_KERNEL); 8724 else 8725 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8726 8727 if (!new_sta) { 8728 err = -ENOMEM; 8729 goto out_err; 8730 } 8731 8732 new_sta->sta.mlo = mlo; 8733 } 8734 8735 /* 8736 * Set up the information for the new channel before setting the 8737 * new channel. We can't - completely race-free - change the basic 8738 * rates bitmap and the channel (sband) that it refers to, but if 8739 * we set it up before we at least avoid calling into the driver's 8740 * bss_info_changed() method with invalid information (since we do 8741 * call that from changing the channel - only for IDLE and perhaps 8742 * some others, but ...). 8743 * 8744 * So to avoid that, just set up all the new information before the 8745 * channel, but tell the driver to apply it only afterwards, since 8746 * it might need the new channel for that. 8747 */ 8748 if (new_sta) { 8749 const struct cfg80211_bss_ies *ies; 8750 struct link_sta_info *link_sta; 8751 8752 rcu_read_lock(); 8753 link_sta = rcu_dereference(new_sta->link[link_id]); 8754 if (WARN_ON(!link_sta)) { 8755 rcu_read_unlock(); 8756 sta_info_free(local, new_sta); 8757 err = -EINVAL; 8758 goto out_err; 8759 } 8760 8761 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8762 link_sta, cbss); 8763 if (err) { 8764 rcu_read_unlock(); 8765 sta_info_free(local, new_sta); 8766 goto out_err; 8767 } 8768 8769 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8770 8771 /* set timing information */ 8772 link->conf->beacon_int = cbss->beacon_interval; 8773 ies = rcu_dereference(cbss->beacon_ies); 8774 if (ies) { 8775 link->conf->sync_tsf = ies->tsf; 8776 link->conf->sync_device_ts = 8777 bss->device_ts_beacon; 8778 8779 ieee80211_get_dtim(ies, 8780 &link->conf->sync_dtim_count, 8781 NULL); 8782 } else if (!ieee80211_hw_check(&sdata->local->hw, 8783 TIMING_BEACON_ONLY)) { 8784 ies = rcu_dereference(cbss->proberesp_ies); 8785 /* must be non-NULL since beacon IEs were NULL */ 8786 link->conf->sync_tsf = ies->tsf; 8787 link->conf->sync_device_ts = 8788 bss->device_ts_presp; 8789 link->conf->sync_dtim_count = 0; 8790 } else { 8791 link->conf->sync_tsf = 0; 8792 link->conf->sync_device_ts = 0; 8793 link->conf->sync_dtim_count = 0; 8794 } 8795 rcu_read_unlock(); 8796 } 8797 8798 if (new_sta || override) { 8799 /* 8800 * Only set this if we're also going to calculate the AP 8801 * settings etc., otherwise this was set before in a 8802 * previous call. Note override is set to %true in assoc 8803 * if the settings were changed. 8804 */ 8805 link->u.mgd.conn = *conn; 8806 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8807 mlo, &link->u.mgd.conn, 8808 userspace_selectors); 8809 if (err) { 8810 if (new_sta) 8811 sta_info_free(local, new_sta); 8812 goto out_err; 8813 } 8814 /* pass out for use in assoc */ 8815 *conn = link->u.mgd.conn; 8816 } 8817 8818 if (new_sta) { 8819 /* 8820 * tell driver about BSSID, basic rates and timing 8821 * this was set up above, before setting the channel 8822 */ 8823 ieee80211_link_info_change_notify(sdata, link, 8824 BSS_CHANGED_BSSID | 8825 BSS_CHANGED_BASIC_RATES | 8826 BSS_CHANGED_BEACON_INT); 8827 8828 if (assoc) 8829 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8830 8831 err = sta_info_insert(new_sta); 8832 new_sta = NULL; 8833 if (err) { 8834 sdata_info(sdata, 8835 "failed to insert STA entry for the AP (error %d)\n", 8836 err); 8837 goto out_release_chan; 8838 } 8839 } else 8840 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8841 8842 /* Cancel scan to ensure that nothing interferes with connection */ 8843 if (local->scanning) 8844 ieee80211_scan_cancel(local); 8845 8846 return 0; 8847 8848 out_release_chan: 8849 ieee80211_link_release_channel(link); 8850 out_err: 8851 ieee80211_vif_set_links(sdata, 0, 0); 8852 return err; 8853 } 8854 8855 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8856 const struct cfg80211_bss_ies *ies, 8857 u8 cur_channel, bool ignore_ecsa) 8858 { 8859 const struct element *csa_elem, *ecsa_elem; 8860 struct ieee80211_channel_sw_ie *csa = NULL; 8861 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8862 8863 if (!ies) 8864 return false; 8865 8866 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8867 ies->data, ies->len); 8868 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8869 csa = (void *)csa_elem->data; 8870 8871 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8872 ies->data, ies->len); 8873 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8874 ecsa = (void *)ecsa_elem->data; 8875 8876 if (csa && csa->count == 0) 8877 csa = NULL; 8878 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8879 csa = NULL; 8880 8881 if (ecsa && ecsa->count == 0) 8882 ecsa = NULL; 8883 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8884 ecsa = NULL; 8885 8886 if (ignore_ecsa && ecsa) { 8887 sdata_info(sdata, 8888 "Ignoring ECSA in probe response - was considered stuck!\n"); 8889 return csa; 8890 } 8891 8892 return csa || ecsa; 8893 } 8894 8895 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8896 struct cfg80211_bss *bss) 8897 { 8898 u8 cur_channel; 8899 bool ret; 8900 8901 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8902 8903 rcu_read_lock(); 8904 if (ieee80211_mgd_csa_present(sdata, 8905 rcu_dereference(bss->beacon_ies), 8906 cur_channel, false)) { 8907 ret = true; 8908 goto out; 8909 } 8910 8911 if (ieee80211_mgd_csa_present(sdata, 8912 rcu_dereference(bss->proberesp_ies), 8913 cur_channel, bss->proberesp_ecsa_stuck)) { 8914 ret = true; 8915 goto out; 8916 } 8917 8918 ret = false; 8919 out: 8920 rcu_read_unlock(); 8921 return ret; 8922 } 8923 8924 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 8925 const u8 *supported_selectors, 8926 u8 supported_selectors_len) 8927 { 8928 if (supported_selectors) { 8929 for (int i = 0; i < supported_selectors_len; i++) { 8930 set_bit(supported_selectors[i], 8931 userspace_selectors); 8932 } 8933 } else { 8934 /* Assume SAE_H2E support for backward compatibility. */ 8935 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 8936 userspace_selectors); 8937 } 8938 } 8939 8940 /* config hooks */ 8941 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8942 struct cfg80211_auth_request *req) 8943 { 8944 struct ieee80211_local *local = sdata->local; 8945 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8946 struct ieee80211_mgd_auth_data *auth_data; 8947 struct ieee80211_conn_settings conn; 8948 struct ieee80211_link_data *link; 8949 struct ieee80211_supported_band *sband; 8950 struct ieee80211_bss *bss; 8951 u16 auth_alg; 8952 int err; 8953 bool cont_auth, wmm_used; 8954 8955 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8956 8957 /* prepare auth data structure */ 8958 8959 switch (req->auth_type) { 8960 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8961 auth_alg = WLAN_AUTH_OPEN; 8962 break; 8963 case NL80211_AUTHTYPE_SHARED_KEY: 8964 if (fips_enabled) 8965 return -EOPNOTSUPP; 8966 auth_alg = WLAN_AUTH_SHARED_KEY; 8967 break; 8968 case NL80211_AUTHTYPE_FT: 8969 auth_alg = WLAN_AUTH_FT; 8970 break; 8971 case NL80211_AUTHTYPE_NETWORK_EAP: 8972 auth_alg = WLAN_AUTH_LEAP; 8973 break; 8974 case NL80211_AUTHTYPE_SAE: 8975 auth_alg = WLAN_AUTH_SAE; 8976 break; 8977 case NL80211_AUTHTYPE_FILS_SK: 8978 auth_alg = WLAN_AUTH_FILS_SK; 8979 break; 8980 case NL80211_AUTHTYPE_FILS_SK_PFS: 8981 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8982 break; 8983 case NL80211_AUTHTYPE_FILS_PK: 8984 auth_alg = WLAN_AUTH_FILS_PK; 8985 break; 8986 default: 8987 return -EOPNOTSUPP; 8988 } 8989 8990 if (ifmgd->assoc_data) 8991 return -EBUSY; 8992 8993 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8994 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8995 return -EINVAL; 8996 } 8997 8998 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8999 req->ie_len, GFP_KERNEL); 9000 if (!auth_data) 9001 return -ENOMEM; 9002 9003 memcpy(auth_data->ap_addr, 9004 req->ap_mld_addr ?: req->bss->bssid, 9005 ETH_ALEN); 9006 auth_data->bss = req->bss; 9007 auth_data->link_id = req->link_id; 9008 9009 if (req->auth_data_len >= 4) { 9010 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9011 __le16 *pos = (__le16 *) req->auth_data; 9012 9013 auth_data->sae_trans = le16_to_cpu(pos[0]); 9014 auth_data->sae_status = le16_to_cpu(pos[1]); 9015 } 9016 memcpy(auth_data->data, req->auth_data + 4, 9017 req->auth_data_len - 4); 9018 auth_data->data_len += req->auth_data_len - 4; 9019 } 9020 9021 /* Check if continuing authentication or trying to authenticate with the 9022 * same BSS that we were in the process of authenticating with and avoid 9023 * removal and re-addition of the STA entry in 9024 * ieee80211_prep_connection(). 9025 */ 9026 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9027 ifmgd->auth_data->link_id == req->link_id; 9028 9029 if (req->ie && req->ie_len) { 9030 memcpy(&auth_data->data[auth_data->data_len], 9031 req->ie, req->ie_len); 9032 auth_data->data_len += req->ie_len; 9033 } 9034 9035 if (req->key && req->key_len) { 9036 auth_data->key_len = req->key_len; 9037 auth_data->key_idx = req->key_idx; 9038 memcpy(auth_data->key, req->key, req->key_len); 9039 } 9040 9041 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9042 req->supported_selectors, 9043 req->supported_selectors_len); 9044 9045 auth_data->algorithm = auth_alg; 9046 9047 /* try to authenticate/probe */ 9048 9049 if (ifmgd->auth_data) { 9050 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9051 auth_data->peer_confirmed = 9052 ifmgd->auth_data->peer_confirmed; 9053 } 9054 ieee80211_destroy_auth_data(sdata, cont_auth); 9055 } 9056 9057 /* prep auth_data so we don't go into idle on disassoc */ 9058 ifmgd->auth_data = auth_data; 9059 9060 /* If this is continuation of an ongoing SAE authentication exchange 9061 * (i.e., request to send SAE Confirm) and the peer has already 9062 * confirmed, mark authentication completed since we are about to send 9063 * out SAE Confirm. 9064 */ 9065 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9066 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9067 ieee80211_mark_sta_auth(sdata); 9068 9069 if (ifmgd->associated) { 9070 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9071 9072 sdata_info(sdata, 9073 "disconnect from AP %pM for new auth to %pM\n", 9074 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9075 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9076 WLAN_REASON_UNSPECIFIED, 9077 false, frame_buf); 9078 9079 ieee80211_report_disconnect(sdata, frame_buf, 9080 sizeof(frame_buf), true, 9081 WLAN_REASON_UNSPECIFIED, 9082 false); 9083 } 9084 9085 /* needed for transmitting the auth frame(s) properly */ 9086 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9087 9088 bss = (void *)req->bss->priv; 9089 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9090 9091 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9092 9093 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9094 &conn); 9095 9096 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9097 req->ap_mld_addr, cont_auth, 9098 &conn, false, 9099 auth_data->userspace_selectors); 9100 if (err) 9101 goto err_clear; 9102 9103 if (req->link_id >= 0) 9104 link = sdata_dereference(sdata->link[req->link_id], sdata); 9105 else 9106 link = &sdata->deflink; 9107 9108 if (WARN_ON(!link)) { 9109 err = -ENOLINK; 9110 goto err_clear; 9111 } 9112 9113 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9114 auth_data->ap_addr, link->conf->addr); 9115 9116 err = ieee80211_auth(sdata); 9117 if (err) { 9118 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9119 goto err_clear; 9120 } 9121 9122 /* hold our own reference */ 9123 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9124 return 0; 9125 9126 err_clear: 9127 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9128 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9129 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9130 BSS_CHANGED_BSSID); 9131 ieee80211_link_release_channel(&sdata->deflink); 9132 } 9133 ifmgd->auth_data = NULL; 9134 kfree(auth_data); 9135 return err; 9136 } 9137 9138 static void 9139 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9140 struct ieee80211_mgd_assoc_data *assoc_data, 9141 struct cfg80211_assoc_request *req, 9142 struct ieee80211_conn_settings *conn, 9143 unsigned int link_id) 9144 { 9145 struct ieee80211_local *local = sdata->local; 9146 const struct cfg80211_bss_ies *bss_ies; 9147 struct ieee80211_supported_band *sband; 9148 struct ieee80211_link_data *link; 9149 struct cfg80211_bss *cbss; 9150 struct ieee80211_bss *bss; 9151 9152 cbss = assoc_data->link[link_id].bss; 9153 if (WARN_ON(!cbss)) 9154 return; 9155 9156 bss = (void *)cbss->priv; 9157 9158 sband = local->hw.wiphy->bands[cbss->channel->band]; 9159 if (WARN_ON(!sband)) 9160 return; 9161 9162 link = sdata_dereference(sdata->link[link_id], sdata); 9163 if (WARN_ON(!link)) 9164 return; 9165 9166 /* for MLO connections assume advertising all rates is OK */ 9167 if (!req->ap_mld_addr) { 9168 assoc_data->supp_rates = bss->supp_rates; 9169 assoc_data->supp_rates_len = bss->supp_rates_len; 9170 } 9171 9172 /* copy and link elems for the STA profile */ 9173 if (req->links[link_id].elems_len) { 9174 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9175 req->links[link_id].elems_len); 9176 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9177 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9178 assoc_data->ie_pos += req->links[link_id].elems_len; 9179 } 9180 9181 link->u.mgd.beacon_crc_valid = false; 9182 link->u.mgd.dtim_period = 0; 9183 link->u.mgd.have_beacon = false; 9184 9185 /* override HT configuration only if the AP and we support it */ 9186 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9187 struct ieee80211_sta_ht_cap sta_ht_cap; 9188 9189 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9190 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9191 } 9192 9193 rcu_read_lock(); 9194 bss_ies = rcu_dereference(cbss->beacon_ies); 9195 if (bss_ies) { 9196 u8 dtim_count = 0; 9197 9198 ieee80211_get_dtim(bss_ies, &dtim_count, 9199 &link->u.mgd.dtim_period); 9200 9201 sdata->deflink.u.mgd.have_beacon = true; 9202 9203 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9204 link->conf->sync_tsf = bss_ies->tsf; 9205 link->conf->sync_device_ts = bss->device_ts_beacon; 9206 link->conf->sync_dtim_count = dtim_count; 9207 } 9208 } else { 9209 bss_ies = rcu_dereference(cbss->ies); 9210 } 9211 9212 if (bss_ies) { 9213 const struct element *elem; 9214 9215 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9216 bss_ies->data, bss_ies->len); 9217 if (elem && elem->datalen >= 3) 9218 link->conf->profile_periodicity = elem->data[2]; 9219 else 9220 link->conf->profile_periodicity = 0; 9221 9222 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9223 bss_ies->data, bss_ies->len); 9224 if (elem && elem->datalen >= 11 && 9225 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9226 link->conf->ema_ap = true; 9227 else 9228 link->conf->ema_ap = false; 9229 } 9230 rcu_read_unlock(); 9231 9232 if (bss->corrupt_data) { 9233 char *corrupt_type = "data"; 9234 9235 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9236 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9237 corrupt_type = "beacon and probe response"; 9238 else 9239 corrupt_type = "beacon"; 9240 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9241 corrupt_type = "probe response"; 9242 } 9243 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9244 cbss->bssid, corrupt_type); 9245 } 9246 9247 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9248 if (sdata->u.mgd.powersave) 9249 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9250 else 9251 link->smps_mode = IEEE80211_SMPS_OFF; 9252 } else { 9253 link->smps_mode = link->u.mgd.req_smps; 9254 } 9255 } 9256 9257 static int 9258 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9259 struct ieee80211_mgd_assoc_data *assoc_data, 9260 int link_id) 9261 { 9262 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9263 enum nl80211_band band = cbss->channel->band; 9264 struct ieee80211_supported_band *sband; 9265 const struct element *elem; 9266 int err; 9267 9268 /* neither HT nor VHT elements used on 6 GHz */ 9269 if (band == NL80211_BAND_6GHZ) 9270 return 0; 9271 9272 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9273 return 0; 9274 9275 rcu_read_lock(); 9276 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9277 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9278 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9279 cbss->bssid); 9280 err = -EINVAL; 9281 goto out_rcu; 9282 } 9283 assoc_data->link[link_id].ap_ht_param = 9284 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9285 rcu_read_unlock(); 9286 9287 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9288 return 0; 9289 9290 /* some drivers want to support VHT on 2.4 GHz even */ 9291 sband = sdata->local->hw.wiphy->bands[band]; 9292 if (!sband->vht_cap.vht_supported) 9293 return 0; 9294 9295 rcu_read_lock(); 9296 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9297 /* but even then accept it not being present on the AP */ 9298 if (!elem && band == NL80211_BAND_2GHZ) { 9299 err = 0; 9300 goto out_rcu; 9301 } 9302 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9303 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9304 cbss->bssid); 9305 err = -EINVAL; 9306 goto out_rcu; 9307 } 9308 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9309 sizeof(struct ieee80211_vht_cap)); 9310 rcu_read_unlock(); 9311 9312 return 0; 9313 out_rcu: 9314 rcu_read_unlock(); 9315 return err; 9316 } 9317 9318 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9319 struct cfg80211_assoc_request *req) 9320 { 9321 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9322 struct ieee80211_local *local = sdata->local; 9323 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9324 struct ieee80211_mgd_assoc_data *assoc_data; 9325 const struct element *ssid_elem; 9326 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9327 struct ieee80211_link_data *link; 9328 struct cfg80211_bss *cbss; 9329 bool override, uapsd_supported; 9330 bool match_auth; 9331 int i, err; 9332 size_t size = sizeof(*assoc_data) + req->ie_len; 9333 9334 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9335 size += req->links[i].elems_len; 9336 9337 /* FIXME: no support for 4-addr MLO yet */ 9338 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9339 return -EOPNOTSUPP; 9340 9341 assoc_data = kzalloc(size, GFP_KERNEL); 9342 if (!assoc_data) 9343 return -ENOMEM; 9344 9345 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9346 9347 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9348 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9349 err = -EINVAL; 9350 goto err_free; 9351 } 9352 9353 rcu_read_lock(); 9354 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9355 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9356 rcu_read_unlock(); 9357 err = -EINVAL; 9358 goto err_free; 9359 } 9360 9361 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9362 assoc_data->ssid_len = ssid_elem->datalen; 9363 rcu_read_unlock(); 9364 9365 if (req->ap_mld_addr) 9366 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9367 else 9368 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9369 9370 if (ifmgd->associated) { 9371 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9372 9373 sdata_info(sdata, 9374 "disconnect from AP %pM for new assoc to %pM\n", 9375 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9376 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9377 WLAN_REASON_UNSPECIFIED, 9378 false, frame_buf); 9379 9380 ieee80211_report_disconnect(sdata, frame_buf, 9381 sizeof(frame_buf), true, 9382 WLAN_REASON_UNSPECIFIED, 9383 false); 9384 } 9385 9386 ieee80211_parse_cfg_selectors(assoc_data->userspace_selectors, 9387 req->supported_selectors, 9388 req->supported_selectors_len); 9389 9390 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9391 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9392 sizeof(ifmgd->ht_capa_mask)); 9393 9394 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9395 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9396 sizeof(ifmgd->vht_capa_mask)); 9397 9398 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9399 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9400 sizeof(ifmgd->s1g_capa_mask)); 9401 9402 /* keep some setup (AP STA, channel, ...) if matching */ 9403 match_auth = ifmgd->auth_data && 9404 ether_addr_equal(ifmgd->auth_data->ap_addr, 9405 assoc_data->ap_addr) && 9406 ifmgd->auth_data->link_id == req->link_id; 9407 9408 if (req->ap_mld_addr) { 9409 uapsd_supported = true; 9410 9411 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9412 ASSOC_REQ_DISABLE_VHT | 9413 ASSOC_REQ_DISABLE_HE | 9414 ASSOC_REQ_DISABLE_EHT)) { 9415 err = -EINVAL; 9416 goto err_free; 9417 } 9418 9419 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9420 struct ieee80211_supported_band *sband; 9421 struct cfg80211_bss *link_cbss = req->links[i].bss; 9422 struct ieee80211_bss *bss; 9423 9424 if (!link_cbss) 9425 continue; 9426 9427 bss = (void *)link_cbss->priv; 9428 9429 if (!bss->wmm_used) { 9430 err = -EINVAL; 9431 req->links[i].error = err; 9432 goto err_free; 9433 } 9434 9435 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9436 err = -EINVAL; 9437 req->links[i].error = err; 9438 goto err_free; 9439 } 9440 9441 link = sdata_dereference(sdata->link[i], sdata); 9442 if (link) 9443 ether_addr_copy(assoc_data->link[i].addr, 9444 link->conf->addr); 9445 else 9446 eth_random_addr(assoc_data->link[i].addr); 9447 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9448 9449 if (match_auth && i == assoc_link_id && link) 9450 assoc_data->link[i].conn = link->u.mgd.conn; 9451 else 9452 assoc_data->link[i].conn = 9453 ieee80211_conn_settings_unlimited; 9454 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9455 req, true, i, 9456 &assoc_data->link[i].conn); 9457 assoc_data->link[i].bss = link_cbss; 9458 assoc_data->link[i].disabled = req->links[i].disabled; 9459 9460 if (!bss->uapsd_supported) 9461 uapsd_supported = false; 9462 9463 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9464 err = -EINVAL; 9465 req->links[i].error = err; 9466 goto err_free; 9467 } 9468 9469 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9470 assoc_data, i); 9471 if (err) { 9472 err = -EINVAL; 9473 req->links[i].error = err; 9474 goto err_free; 9475 } 9476 } 9477 9478 assoc_data->wmm = true; 9479 } else { 9480 struct ieee80211_supported_band *sband; 9481 struct ieee80211_bss *bss = (void *)cbss->priv; 9482 9483 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9484 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9485 9486 assoc_data->wmm = bss->wmm_used && 9487 (local->hw.queues >= IEEE80211_NUM_ACS); 9488 9489 if (cbss->channel->band == NL80211_BAND_6GHZ && 9490 req->flags & (ASSOC_REQ_DISABLE_HT | 9491 ASSOC_REQ_DISABLE_VHT | 9492 ASSOC_REQ_DISABLE_HE)) { 9493 err = -EINVAL; 9494 goto err_free; 9495 } 9496 9497 sband = local->hw.wiphy->bands[cbss->channel->band]; 9498 9499 assoc_data->link[0].bss = cbss; 9500 9501 if (match_auth) 9502 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9503 else 9504 assoc_data->link[0].conn = 9505 ieee80211_conn_settings_unlimited; 9506 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9507 assoc_data->wmm, 0, 9508 &assoc_data->link[0].conn); 9509 9510 uapsd_supported = bss->uapsd_supported; 9511 9512 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9513 if (err) 9514 goto err_free; 9515 } 9516 9517 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9518 9519 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9520 err = -EBUSY; 9521 goto err_free; 9522 } 9523 9524 if (ifmgd->assoc_data) { 9525 err = -EBUSY; 9526 goto err_free; 9527 } 9528 9529 /* Cleanup is delayed if auth_data matches */ 9530 if (ifmgd->auth_data && !match_auth) 9531 ieee80211_destroy_auth_data(sdata, false); 9532 9533 if (req->ie && req->ie_len) { 9534 memcpy(assoc_data->ie, req->ie, req->ie_len); 9535 assoc_data->ie_len = req->ie_len; 9536 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9537 } else { 9538 assoc_data->ie_pos = assoc_data->ie; 9539 } 9540 9541 if (req->fils_kek) { 9542 /* should already be checked in cfg80211 - so warn */ 9543 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9544 err = -EINVAL; 9545 goto err_free; 9546 } 9547 memcpy(assoc_data->fils_kek, req->fils_kek, 9548 req->fils_kek_len); 9549 assoc_data->fils_kek_len = req->fils_kek_len; 9550 } 9551 9552 if (req->fils_nonces) 9553 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9554 2 * FILS_NONCE_LEN); 9555 9556 /* default timeout */ 9557 assoc_data->timeout = jiffies; 9558 assoc_data->timeout_started = true; 9559 9560 assoc_data->assoc_link_id = assoc_link_id; 9561 9562 if (req->ap_mld_addr) { 9563 /* if there was no authentication, set up the link */ 9564 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9565 if (err) 9566 goto err_clear; 9567 } 9568 9569 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9570 if (WARN_ON(!link)) { 9571 err = -EINVAL; 9572 goto err_clear; 9573 } 9574 9575 override = link->u.mgd.conn.mode != 9576 assoc_data->link[assoc_link_id].conn.mode || 9577 link->u.mgd.conn.bw_limit != 9578 assoc_data->link[assoc_link_id].conn.bw_limit; 9579 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9580 9581 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9582 assoc_link_id); 9583 9584 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9585 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9586 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9587 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9588 9589 if (assoc_data->wmm && uapsd_supported && 9590 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9591 assoc_data->uapsd = true; 9592 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9593 } else { 9594 assoc_data->uapsd = false; 9595 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9596 } 9597 9598 if (req->prev_bssid) 9599 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9600 9601 if (req->use_mfp) { 9602 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9603 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9604 } else { 9605 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9606 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9607 } 9608 9609 if (req->flags & ASSOC_REQ_USE_RRM) 9610 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9611 else 9612 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9613 9614 if (req->crypto.control_port) 9615 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9616 else 9617 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9618 9619 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9620 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9621 sdata->control_port_over_nl80211 = 9622 req->crypto.control_port_over_nl80211; 9623 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9624 9625 /* kick off associate process */ 9626 ifmgd->assoc_data = assoc_data; 9627 9628 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9629 if (!assoc_data->link[i].bss) 9630 continue; 9631 if (i == assoc_data->assoc_link_id) 9632 continue; 9633 /* only calculate the mode, hence link == NULL */ 9634 err = ieee80211_prep_channel(sdata, NULL, i, 9635 assoc_data->link[i].bss, true, 9636 &assoc_data->link[i].conn, 9637 assoc_data->userspace_selectors); 9638 if (err) { 9639 req->links[i].error = err; 9640 goto err_clear; 9641 } 9642 } 9643 9644 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9645 vif_cfg->ssid_len = assoc_data->ssid_len; 9646 9647 /* needed for transmitting the assoc frames properly */ 9648 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9649 9650 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9651 req->ap_mld_addr, true, 9652 &assoc_data->link[assoc_link_id].conn, 9653 override, 9654 assoc_data->userspace_selectors); 9655 if (err) 9656 goto err_clear; 9657 9658 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9659 const struct cfg80211_bss_ies *beacon_ies; 9660 9661 rcu_read_lock(); 9662 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9663 if (!beacon_ies) { 9664 /* 9665 * Wait up to one beacon interval ... 9666 * should this be more if we miss one? 9667 */ 9668 sdata_info(sdata, "waiting for beacon from %pM\n", 9669 link->u.mgd.bssid); 9670 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9671 assoc_data->timeout_started = true; 9672 assoc_data->need_beacon = true; 9673 } 9674 rcu_read_unlock(); 9675 } 9676 9677 run_again(sdata, assoc_data->timeout); 9678 9679 /* We are associating, clean up auth_data */ 9680 if (ifmgd->auth_data) 9681 ieee80211_destroy_auth_data(sdata, true); 9682 9683 return 0; 9684 err_clear: 9685 if (!ifmgd->auth_data) { 9686 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9687 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9688 BSS_CHANGED_BSSID); 9689 } 9690 ifmgd->assoc_data = NULL; 9691 err_free: 9692 kfree(assoc_data); 9693 return err; 9694 } 9695 9696 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9697 struct cfg80211_deauth_request *req) 9698 { 9699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9700 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9701 bool tx = !req->local_state_change; 9702 struct ieee80211_prep_tx_info info = { 9703 .subtype = IEEE80211_STYPE_DEAUTH, 9704 }; 9705 9706 if (ifmgd->auth_data && 9707 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9708 sdata_info(sdata, 9709 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9710 req->bssid, req->reason_code, 9711 ieee80211_get_reason_code_string(req->reason_code)); 9712 9713 info.link_id = ifmgd->auth_data->link_id; 9714 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9715 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9716 IEEE80211_STYPE_DEAUTH, 9717 req->reason_code, tx, 9718 frame_buf); 9719 ieee80211_destroy_auth_data(sdata, false); 9720 ieee80211_report_disconnect(sdata, frame_buf, 9721 sizeof(frame_buf), true, 9722 req->reason_code, false); 9723 drv_mgd_complete_tx(sdata->local, sdata, &info); 9724 return 0; 9725 } 9726 9727 if (ifmgd->assoc_data && 9728 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9729 sdata_info(sdata, 9730 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9731 req->bssid, req->reason_code, 9732 ieee80211_get_reason_code_string(req->reason_code)); 9733 9734 info.link_id = ifmgd->assoc_data->assoc_link_id; 9735 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9736 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9737 IEEE80211_STYPE_DEAUTH, 9738 req->reason_code, tx, 9739 frame_buf); 9740 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9741 ieee80211_report_disconnect(sdata, frame_buf, 9742 sizeof(frame_buf), true, 9743 req->reason_code, false); 9744 drv_mgd_complete_tx(sdata->local, sdata, &info); 9745 return 0; 9746 } 9747 9748 if (ifmgd->associated && 9749 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9750 sdata_info(sdata, 9751 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9752 req->bssid, req->reason_code, 9753 ieee80211_get_reason_code_string(req->reason_code)); 9754 9755 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9756 req->reason_code, tx, frame_buf); 9757 ieee80211_report_disconnect(sdata, frame_buf, 9758 sizeof(frame_buf), true, 9759 req->reason_code, false); 9760 return 0; 9761 } 9762 9763 return -ENOTCONN; 9764 } 9765 9766 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9767 struct cfg80211_disassoc_request *req) 9768 { 9769 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9770 9771 if (!sdata->u.mgd.associated || 9772 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9773 return -ENOTCONN; 9774 9775 sdata_info(sdata, 9776 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9777 req->ap_addr, req->reason_code, 9778 ieee80211_get_reason_code_string(req->reason_code)); 9779 9780 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9781 req->reason_code, !req->local_state_change, 9782 frame_buf); 9783 9784 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9785 req->reason_code, false); 9786 9787 return 0; 9788 } 9789 9790 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9791 { 9792 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9793 &link->u.mgd.request_smps_work); 9794 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9795 &link->u.mgd.recalc_smps); 9796 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9797 &link->u.mgd.csa.switch_work); 9798 } 9799 9800 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9801 { 9802 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9803 9804 /* 9805 * Make sure some work items will not run after this, 9806 * they will not do anything but might not have been 9807 * cancelled when disconnecting. 9808 */ 9809 wiphy_work_cancel(sdata->local->hw.wiphy, 9810 &ifmgd->monitor_work); 9811 wiphy_work_cancel(sdata->local->hw.wiphy, 9812 &ifmgd->beacon_connection_loss_work); 9813 wiphy_work_cancel(sdata->local->hw.wiphy, 9814 &ifmgd->csa_connection_drop_work); 9815 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9816 &ifmgd->tdls_peer_del_work); 9817 9818 if (ifmgd->assoc_data) 9819 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9820 if (ifmgd->auth_data) 9821 ieee80211_destroy_auth_data(sdata, false); 9822 spin_lock_bh(&ifmgd->teardown_lock); 9823 if (ifmgd->teardown_skb) { 9824 kfree_skb(ifmgd->teardown_skb); 9825 ifmgd->teardown_skb = NULL; 9826 ifmgd->orig_teardown_skb = NULL; 9827 } 9828 kfree(ifmgd->assoc_req_ies); 9829 ifmgd->assoc_req_ies = NULL; 9830 ifmgd->assoc_req_ies_len = 0; 9831 spin_unlock_bh(&ifmgd->teardown_lock); 9832 del_timer_sync(&ifmgd->timer); 9833 } 9834 9835 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9836 enum nl80211_cqm_rssi_threshold_event rssi_event, 9837 s32 rssi_level, 9838 gfp_t gfp) 9839 { 9840 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9841 9842 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9843 9844 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9845 } 9846 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9847 9848 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9849 { 9850 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9851 9852 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9853 9854 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9855 } 9856 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9857 9858 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9859 int rssi_min_thold, 9860 int rssi_max_thold) 9861 { 9862 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9863 9864 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9865 return; 9866 9867 /* 9868 * Scale up threshold values before storing it, as the RSSI averaging 9869 * algorithm uses a scaled up value as well. Change this scaling 9870 * factor if the RSSI averaging algorithm changes. 9871 */ 9872 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9873 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9874 } 9875 9876 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9877 int rssi_min_thold, 9878 int rssi_max_thold) 9879 { 9880 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9881 9882 WARN_ON(rssi_min_thold == rssi_max_thold || 9883 rssi_min_thold > rssi_max_thold); 9884 9885 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9886 rssi_max_thold); 9887 } 9888 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9889 9890 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9891 { 9892 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9893 9894 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9895 } 9896 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9897 9898 static void ieee80211_ml_reconf_selectors(unsigned long *userspace_selectors) 9899 { 9900 *userspace_selectors = 0; 9901 9902 /* these selectors are mandatory for ML reconfiguration */ 9903 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, userspace_selectors); 9904 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, userspace_selectors); 9905 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, userspace_selectors); 9906 } 9907 9908 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 9909 struct ieee80211_mgmt *mgmt, size_t len) 9910 { 9911 struct ieee80211_local *local = sdata->local; 9912 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9913 struct ieee80211_mgd_assoc_data *add_links_data = 9914 ifmgd->reconf.add_links_data; 9915 struct sta_info *sta; 9916 struct cfg80211_mlo_reconf_done_data done_data = {}; 9917 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 9918 sdata->u.mgd.reconf.removed_links; 9919 u16 link_mask, valid_links; 9920 unsigned int link_id; 9921 unsigned long userspace_selectors; 9922 size_t orig_len = len; 9923 u8 i, group_key_data_len; 9924 u8 *pos; 9925 9926 if (!ieee80211_vif_is_mld(&sdata->vif) || 9927 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 9928 mgmt->u.action.u.ml_reconf_resp.dialog_token != 9929 sdata->u.mgd.reconf.dialog_token || 9930 !sta_changed_links) 9931 return; 9932 9933 pos = mgmt->u.action.u.ml_reconf_resp.variable; 9934 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 9935 9936 /* each status duple is 3 octets */ 9937 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 9938 sdata_info(sdata, 9939 "mlo: reconf: unexpected len=%zu, count=%u\n", 9940 len, mgmt->u.action.u.ml_reconf_resp.count); 9941 goto disconnect; 9942 } 9943 9944 link_mask = sta_changed_links; 9945 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 9946 u16 status = get_unaligned_le16(pos + 1); 9947 9948 link_id = *pos; 9949 9950 if (!(link_mask & BIT(link_id))) { 9951 sdata_info(sdata, 9952 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 9953 link_id, sta_changed_links); 9954 goto disconnect; 9955 } 9956 9957 /* clear the corresponding link, to detect the case that 9958 * the same link was included more than one time 9959 */ 9960 link_mask &= ~BIT(link_id); 9961 9962 /* Handle failure to remove links here. Failure to remove added 9963 * links will be done later in the flow. 9964 */ 9965 if (status != WLAN_STATUS_SUCCESS) { 9966 sdata_info(sdata, 9967 "mlo: reconf: failed on link=%u, status=%u\n", 9968 link_id, status); 9969 9970 /* The AP MLD failed to remove a link that was already 9971 * removed locally. As this is not expected behavior, 9972 * disconnect 9973 */ 9974 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 9975 goto disconnect; 9976 9977 /* The AP MLD failed to add a link. Remove it from the 9978 * added links. 9979 */ 9980 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 9981 } 9982 9983 pos += 3; 9984 len -= 3; 9985 } 9986 9987 if (link_mask) { 9988 sdata_info(sdata, 9989 "mlo: reconf: no response for links=0x%x\n", 9990 link_mask); 9991 goto disconnect; 9992 } 9993 9994 if (!sdata->u.mgd.reconf.added_links) 9995 goto out; 9996 9997 if (len < 1 || len < 1 + *pos) { 9998 sdata_info(sdata, 9999 "mlo: reconf: invalid group key data length"); 10000 goto disconnect; 10001 } 10002 10003 /* The Group Key Data field must be present when links are added. This 10004 * field should be processed by userland. 10005 */ 10006 group_key_data_len = *pos++; 10007 10008 pos += group_key_data_len; 10009 len -= group_key_data_len + 1; 10010 10011 /* Process the information for the added links */ 10012 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10013 if (WARN_ON(!sta)) 10014 goto disconnect; 10015 10016 valid_links = sdata->vif.valid_links; 10017 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10018 if (!add_links_data->link[link_id].bss || 10019 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10020 10021 continue; 10022 10023 valid_links |= BIT(link_id); 10024 if (ieee80211_sta_allocate_link(sta, link_id)) 10025 goto disconnect; 10026 } 10027 10028 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10029 ieee80211_ml_reconf_selectors(&userspace_selectors); 10030 link_mask = 0; 10031 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10032 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10033 struct ieee80211_link_data *link; 10034 struct link_sta_info *link_sta; 10035 u64 changed = 0; 10036 10037 if (!cbss) 10038 continue; 10039 10040 link = sdata_dereference(sdata->link[link_id], sdata); 10041 if (WARN_ON(!link)) 10042 goto disconnect; 10043 10044 link_info(link, 10045 "mlo: reconf: local address %pM, AP link address %pM\n", 10046 add_links_data->link[link_id].addr, 10047 add_links_data->link[link_id].bss->bssid); 10048 10049 link_sta = rcu_dereference_protected(sta->link[link_id], 10050 lockdep_is_held(&local->hw.wiphy->mtx)); 10051 if (WARN_ON(!link_sta)) 10052 goto disconnect; 10053 10054 if (!link->u.mgd.have_beacon) { 10055 const struct cfg80211_bss_ies *ies; 10056 10057 rcu_read_lock(); 10058 ies = rcu_dereference(cbss->beacon_ies); 10059 if (ies) 10060 link->u.mgd.have_beacon = true; 10061 else 10062 ies = rcu_dereference(cbss->ies); 10063 ieee80211_get_dtim(ies, 10064 &link->conf->sync_dtim_count, 10065 &link->u.mgd.dtim_period); 10066 link->conf->beacon_int = cbss->beacon_interval; 10067 rcu_read_unlock(); 10068 } 10069 10070 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10071 10072 link->u.mgd.conn = add_links_data->link[link_id].conn; 10073 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10074 true, &link->u.mgd.conn, 10075 &userspace_selectors)) { 10076 link_info(link, "mlo: reconf: prep_channel failed\n"); 10077 goto disconnect; 10078 } 10079 10080 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10081 add_links_data->link[link_id].bss)) 10082 goto disconnect; 10083 10084 if (!ieee80211_assoc_config_link(link, link_sta, 10085 add_links_data->link[link_id].bss, 10086 mgmt, pos, len, 10087 &changed)) 10088 goto disconnect; 10089 10090 /* The AP MLD indicated success for this link, but the station 10091 * profile status indicated otherwise. Since there is an 10092 * inconsistency in the ML reconfiguration response, disconnect 10093 */ 10094 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10095 goto disconnect; 10096 10097 ieee80211_sta_init_nss(link_sta); 10098 if (ieee80211_sta_activate_link(sta, link_id)) 10099 goto disconnect; 10100 10101 changed |= ieee80211_link_set_associated(link, cbss); 10102 ieee80211_link_info_change_notify(sdata, link, changed); 10103 10104 ieee80211_recalc_smps(sdata, link); 10105 link_mask |= BIT(link_id); 10106 } 10107 10108 sdata_info(sdata, 10109 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10110 valid_links, link_mask); 10111 10112 /* links might have changed due to rejected ones, set them again */ 10113 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10114 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10115 10116 ieee80211_recalc_ps(local); 10117 ieee80211_recalc_ps_vif(sdata); 10118 10119 done_data.buf = (const u8 *)mgmt; 10120 done_data.len = orig_len; 10121 done_data.added_links = link_mask; 10122 10123 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) 10124 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10125 10126 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10127 kfree(sdata->u.mgd.reconf.add_links_data); 10128 sdata->u.mgd.reconf.add_links_data = NULL; 10129 out: 10130 ieee80211_ml_reconf_reset(sdata); 10131 return; 10132 10133 disconnect: 10134 __ieee80211_disconnect(sdata); 10135 } 10136 10137 static struct sk_buff * 10138 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10139 struct ieee80211_mgd_assoc_data *add_links_data, 10140 u16 removed_links) 10141 { 10142 struct ieee80211_local *local = sdata->local; 10143 struct ieee80211_mgmt *mgmt; 10144 struct ieee80211_multi_link_elem *ml_elem; 10145 struct ieee80211_mle_basic_common_info *common; 10146 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10147 struct sk_buff *skb; 10148 size_t size; 10149 unsigned int link_id; 10150 __le16 eml_capa = 0, mld_capa_ops = 0; 10151 struct ieee80211_tx_info *info; 10152 u8 common_size, var_common_size; 10153 u8 *ml_elem_len; 10154 u16 capab = 0; 10155 10156 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10157 10158 /* Consider the maximal length of the reconfiguration ML element */ 10159 size += sizeof(struct ieee80211_multi_link_elem); 10160 10161 /* The Basic ML element and the Reconfiguration ML element have the same 10162 * fixed common information fields in the context of ML reconfiguration 10163 * action frame. The AP MLD MAC address must always be present 10164 */ 10165 common_size = sizeof(*common); 10166 10167 /* when adding links, the MLD capabilities must be present */ 10168 var_common_size = 0; 10169 if (add_links_data) { 10170 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10171 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10172 ieee80211_vif_type_p2p(&sdata->vif)); 10173 10174 if (ift_ext_capa) { 10175 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10176 mld_capa_ops = 10177 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10178 } 10179 10180 /* MLD capabilities and operation */ 10181 var_common_size += 2; 10182 10183 /* EML capabilities */ 10184 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10185 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10186 var_common_size += 2; 10187 } 10188 10189 /* Add the common information length */ 10190 size += common_size + var_common_size; 10191 10192 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10193 struct cfg80211_bss *cbss; 10194 size_t elems_len; 10195 10196 if (removed_links & BIT(link_id)) { 10197 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10198 ETH_ALEN; 10199 continue; 10200 } 10201 10202 if (!add_links_data || !add_links_data->link[link_id].bss) 10203 continue; 10204 10205 elems_len = add_links_data->link[link_id].elems_len; 10206 cbss = add_links_data->link[link_id].bss; 10207 10208 /* should be the same across all BSSes */ 10209 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10210 capab |= WLAN_CAPABILITY_PRIVACY; 10211 10212 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10213 ETH_ALEN; 10214 10215 /* SSID element + WMM */ 10216 size += 2 + sdata->vif.cfg.ssid_len + 9; 10217 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10218 elems_len); 10219 } 10220 10221 skb = alloc_skb(size, GFP_KERNEL); 10222 if (!skb) 10223 return NULL; 10224 10225 skb_reserve(skb, local->hw.extra_tx_headroom); 10226 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10227 u.action.u.ml_reconf_req)); 10228 10229 /* Add the MAC header */ 10230 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10231 IEEE80211_STYPE_ACTION); 10232 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10233 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10234 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10235 10236 /* Add the action frame fixed fields */ 10237 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10238 mgmt->u.action.u.ml_reconf_req.action_code = 10239 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10240 10241 /* allocate a dialog token and store it */ 10242 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10243 mgmt->u.action.u.ml_reconf_req.dialog_token = 10244 sdata->u.mgd.reconf.dialog_token; 10245 10246 /* Add the ML reconfiguration element and the common information */ 10247 skb_put_u8(skb, WLAN_EID_EXTENSION); 10248 ml_elem_len = skb_put(skb, 1); 10249 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10250 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10251 ml_elem->control = 10252 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10253 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10254 common = skb_put(skb, common_size); 10255 common->len = common_size + var_common_size; 10256 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10257 10258 if (add_links_data) { 10259 if (eml_capa & 10260 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10261 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10262 ml_elem->control |= 10263 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10264 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10265 } 10266 10267 ml_elem->control |= 10268 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10269 10270 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10271 } 10272 10273 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10274 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10275 10276 /* Add the per station profile */ 10277 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10278 u8 *subelem_len = NULL; 10279 u16 ctrl; 10280 const u8 *addr; 10281 10282 /* Skip links that are not changing */ 10283 if (!(removed_links & BIT(link_id)) && 10284 (!add_links_data || !add_links_data->link[link_id].bss)) 10285 continue; 10286 10287 ctrl = link_id | 10288 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10289 10290 if (removed_links & BIT(link_id)) { 10291 struct ieee80211_bss_conf *conf = 10292 sdata_dereference(sdata->vif.link_conf[link_id], 10293 sdata); 10294 if (!conf) 10295 continue; 10296 10297 addr = conf->addr; 10298 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10299 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10300 } else { 10301 addr = add_links_data->link[link_id].addr; 10302 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10303 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10304 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10305 } 10306 10307 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10308 subelem_len = skb_put(skb, 1); 10309 10310 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10311 skb_put_u8(skb, 1 + ETH_ALEN); 10312 skb_put_data(skb, addr, ETH_ALEN); 10313 10314 if (!(removed_links & BIT(link_id))) { 10315 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10316 size_t extra_used; 10317 void *capab_pos; 10318 u8 qos_info; 10319 10320 capab_pos = skb_put(skb, 2); 10321 10322 skb_put_u8(skb, WLAN_EID_SSID); 10323 skb_put_u8(skb, sdata->vif.cfg.ssid_len); 10324 skb_put_data(skb, sdata->vif.cfg.ssid, 10325 sdata->vif.cfg.ssid_len); 10326 10327 extra_used = 10328 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10329 add_links_data->link[link_id].elems, 10330 add_links_data->link[link_id].elems_len, 10331 link_id, NULL, 10332 link_present_elems, 10333 add_links_data); 10334 10335 if (add_links_data->link[link_id].elems) 10336 skb_put_data(skb, 10337 add_links_data->link[link_id].elems + 10338 extra_used, 10339 add_links_data->link[link_id].elems_len - 10340 extra_used); 10341 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10342 qos_info = sdata->u.mgd.uapsd_queues; 10343 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10344 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10345 } else { 10346 qos_info = 0; 10347 } 10348 10349 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10350 put_unaligned_le16(capab, capab_pos); 10351 } 10352 10353 ieee80211_fragment_element(skb, subelem_len, 10354 IEEE80211_MLE_SUBELEM_FRAGMENT); 10355 } 10356 10357 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10358 10359 info = IEEE80211_SKB_CB(skb); 10360 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10361 10362 return skb; 10363 } 10364 10365 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10366 struct cfg80211_assoc_link *add_links, 10367 u16 rem_links) 10368 { 10369 struct ieee80211_local *local = sdata->local; 10370 struct ieee80211_mgd_assoc_data *data = NULL; 10371 struct sta_info *sta; 10372 struct sk_buff *skb; 10373 u16 added_links, new_valid_links; 10374 int link_id, err; 10375 10376 if (!ieee80211_vif_is_mld(&sdata->vif) || 10377 !(sdata->vif.cfg.mld_capa_op & 10378 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10379 return -EINVAL; 10380 10381 /* No support for concurrent ML reconfiguration operation */ 10382 if (sdata->u.mgd.reconf.added_links || 10383 sdata->u.mgd.reconf.removed_links) 10384 return -EBUSY; 10385 10386 added_links = 0; 10387 for (link_id = 0; add_links && link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10388 link_id++) { 10389 if (!add_links[link_id].bss) 10390 continue; 10391 10392 added_links |= BIT(link_id); 10393 } 10394 10395 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10396 if (WARN_ON(!sta)) 10397 return -ENOLINK; 10398 10399 /* Adding links to the set of valid link is done only after a successful 10400 * ML reconfiguration frame exchange. Here prepare the data for the ML 10401 * reconfiguration frame construction and allocate the required 10402 * resources 10403 */ 10404 if (added_links) { 10405 bool uapsd_supported; 10406 unsigned long userspace_selectors; 10407 10408 data = kzalloc(sizeof(*data), GFP_KERNEL); 10409 if (!data) 10410 return -ENOMEM; 10411 10412 uapsd_supported = true; 10413 ieee80211_ml_reconf_selectors(&userspace_selectors); 10414 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10415 link_id++) { 10416 struct ieee80211_supported_band *sband; 10417 struct cfg80211_bss *link_cbss = add_links[link_id].bss; 10418 struct ieee80211_bss *bss; 10419 10420 if (!link_cbss) 10421 continue; 10422 10423 bss = (void *)link_cbss->priv; 10424 10425 if (!bss->wmm_used) { 10426 err = -EINVAL; 10427 goto err_free; 10428 } 10429 10430 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10431 err = -EINVAL; 10432 goto err_free; 10433 } 10434 10435 eth_random_addr(data->link[link_id].addr); 10436 data->link[link_id].conn = 10437 ieee80211_conn_settings_unlimited; 10438 sband = 10439 local->hw.wiphy->bands[link_cbss->channel->band]; 10440 10441 ieee80211_determine_our_sta_mode(sdata, sband, 10442 NULL, true, link_id, 10443 &data->link[link_id].conn); 10444 10445 data->link[link_id].bss = link_cbss; 10446 data->link[link_id].disabled = 10447 add_links[link_id].disabled; 10448 data->link[link_id].elems = 10449 (u8 *)add_links[link_id].elems; 10450 data->link[link_id].elems_len = 10451 add_links[link_id].elems_len; 10452 10453 if (!bss->uapsd_supported) 10454 uapsd_supported = false; 10455 10456 if (data->link[link_id].conn.mode < 10457 IEEE80211_CONN_MODE_EHT) { 10458 err = -EINVAL; 10459 goto err_free; 10460 } 10461 10462 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10463 link_id); 10464 if (err) { 10465 err = -EINVAL; 10466 goto err_free; 10467 } 10468 } 10469 10470 /* Require U-APSD support to be similar to the current valid 10471 * links 10472 */ 10473 if (uapsd_supported != 10474 !!(sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED)) { 10475 err = -EINVAL; 10476 goto err_free; 10477 } 10478 10479 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10480 link_id++) { 10481 if (!data->link[link_id].bss) 10482 continue; 10483 10484 /* only used to verify the mode, nothing is allocated */ 10485 err = ieee80211_prep_channel(sdata, NULL, link_id, 10486 data->link[link_id].bss, 10487 true, 10488 &data->link[link_id].conn, 10489 &userspace_selectors); 10490 if (err) 10491 goto err_free; 10492 } 10493 } 10494 10495 /* link removal is done before the ML reconfiguration frame exchange so 10496 * that these links will not be used between their removal by the AP MLD 10497 * and before the station got the ML reconfiguration response. Based on 10498 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10499 * link removal request. 10500 */ 10501 if (rem_links) { 10502 u16 new_active_links = sdata->vif.active_links & ~rem_links; 10503 10504 new_valid_links = sdata->vif.valid_links & ~rem_links; 10505 10506 /* Should not be left with no valid links to perform the 10507 * ML reconfiguration 10508 */ 10509 if (!new_valid_links || 10510 !(new_valid_links & ~sdata->vif.dormant_links)) { 10511 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10512 err = -EINVAL; 10513 goto err_free; 10514 } 10515 10516 if (new_active_links != sdata->vif.active_links) { 10517 if (!new_active_links) 10518 new_active_links = 10519 BIT(__ffs(new_valid_links & 10520 ~sdata->vif.dormant_links)); 10521 10522 err = ieee80211_set_active_links(&sdata->vif, 10523 new_active_links); 10524 if (err) { 10525 sdata_info(sdata, 10526 "mlo: reconf: failed set active links\n"); 10527 goto err_free; 10528 } 10529 } 10530 } 10531 10532 /* Build the SKB before the link removal as the construction of the 10533 * station info for removed links requires the local address. 10534 * Invalidate the removed links, so that the transmission of the ML 10535 * reconfiguration request frame would not be done using them, as the AP 10536 * is expected to send the ML reconfiguration response frame on the link 10537 * on which the request was received. 10538 */ 10539 skb = ieee80211_build_ml_reconf_req(sdata, data, rem_links); 10540 if (!skb) { 10541 err = -ENOMEM; 10542 goto err_free; 10543 } 10544 10545 if (rem_links) { 10546 u16 new_dormant_links = sdata->vif.dormant_links & ~rem_links; 10547 10548 err = ieee80211_vif_set_links(sdata, new_valid_links, 10549 new_dormant_links); 10550 if (err) { 10551 sdata_info(sdata, 10552 "mlo: reconf: failed set valid links\n"); 10553 kfree_skb(skb); 10554 goto err_free; 10555 } 10556 10557 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10558 link_id++) { 10559 if (!(rem_links & BIT(link_id))) 10560 continue; 10561 10562 ieee80211_sta_remove_link(sta, link_id); 10563 } 10564 10565 /* notify the driver and upper layers */ 10566 ieee80211_vif_cfg_change_notify(sdata, 10567 BSS_CHANGED_MLD_VALID_LINKS); 10568 cfg80211_links_removed(sdata->dev, rem_links); 10569 } 10570 10571 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10572 added_links, rem_links); 10573 10574 ieee80211_tx_skb(sdata, skb); 10575 10576 sdata->u.mgd.reconf.added_links = added_links; 10577 sdata->u.mgd.reconf.add_links_data = data; 10578 sdata->u.mgd.reconf.removed_links = rem_links; 10579 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10580 &sdata->u.mgd.reconf.wk, 10581 IEEE80211_ASSOC_TIMEOUT_SHORT); 10582 return 0; 10583 10584 err_free: 10585 kfree(data); 10586 return err; 10587 } 10588 10589 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10590 { 10591 unsigned long valid_links = sdata->vif.valid_links; 10592 u8 link_id; 10593 10594 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10595 10596 if (!ieee80211_vif_is_mld(&sdata->vif)) 10597 return false; 10598 10599 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10600 struct ieee80211_bss_conf *bss_conf = 10601 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10602 10603 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10604 return false; 10605 } 10606 10607 return true; 10608 } 10609 10610 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10611 { 10612 struct ieee80211_local *local = sdata->local; 10613 struct ieee80211_mgmt *mgmt; 10614 struct sk_buff *skb; 10615 int frame_len = offsetofend(struct ieee80211_mgmt, 10616 u.action.u.epcs) + (enable ? 1 : 0); 10617 10618 if (!ieee80211_mgd_epcs_supp(sdata)) 10619 return -EINVAL; 10620 10621 if (sdata->u.mgd.epcs.enabled == enable && 10622 !sdata->u.mgd.epcs.dialog_token) 10623 return 0; 10624 10625 /* Do not allow enabling EPCS if the AP didn't respond yet. 10626 * However, allow disabling EPCS in such a case. 10627 */ 10628 if (sdata->u.mgd.epcs.dialog_token && enable) 10629 return -EALREADY; 10630 10631 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10632 if (!skb) 10633 return -ENOBUFS; 10634 10635 skb_reserve(skb, local->hw.extra_tx_headroom); 10636 mgmt = skb_put_zero(skb, frame_len); 10637 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10638 IEEE80211_STYPE_ACTION); 10639 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10640 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10641 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10642 10643 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10644 if (enable) { 10645 u8 *pos = mgmt->u.action.u.epcs.variable; 10646 10647 mgmt->u.action.u.epcs.action_code = 10648 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10649 10650 *pos = ++sdata->u.mgd.dialog_token_alloc; 10651 sdata->u.mgd.epcs.dialog_token = *pos; 10652 } else { 10653 mgmt->u.action.u.epcs.action_code = 10654 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10655 10656 ieee80211_epcs_teardown(sdata); 10657 ieee80211_epcs_changed(sdata, false); 10658 } 10659 10660 ieee80211_tx_skb(sdata, skb); 10661 return 0; 10662 } 10663 10664 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10665 struct ieee802_11_elems *elems) 10666 { 10667 const struct element *sub; 10668 size_t scratch_len = elems->ml_epcs_len; 10669 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10670 10671 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10672 10673 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10674 return; 10675 10676 if (WARN_ON(!scratch)) 10677 return; 10678 10679 /* Directly parse the sub elements as the common information doesn't 10680 * hold any useful information. 10681 */ 10682 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10683 elems->ml_epcs_len) { 10684 struct ieee80211_link_data *link; 10685 struct ieee802_11_elems *link_elems __free(kfree); 10686 u8 *pos = (void *)sub->data; 10687 u16 control; 10688 ssize_t len; 10689 u8 link_id; 10690 10691 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10692 continue; 10693 10694 if (sub->datalen < sizeof(control)) 10695 break; 10696 10697 control = get_unaligned_le16(pos); 10698 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10699 10700 link = sdata_dereference(sdata->link[link_id], sdata); 10701 if (!link) 10702 continue; 10703 10704 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10705 elems->ml_epcs_len, 10706 scratch, scratch_len, 10707 IEEE80211_MLE_SUBELEM_FRAGMENT); 10708 if (len < (ssize_t)sizeof(control)) 10709 continue; 10710 10711 pos = scratch + sizeof(control); 10712 len -= sizeof(control); 10713 10714 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10715 if (!link_elems) 10716 continue; 10717 10718 if (ieee80211_sta_wmm_params(sdata->local, link, 10719 link_elems->wmm_param, 10720 link_elems->wmm_param_len, 10721 link_elems->mu_edca_param_set)) 10722 ieee80211_link_info_change_notify(sdata, link, 10723 BSS_CHANGED_QOS); 10724 } 10725 } 10726 10727 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10728 struct ieee80211_mgmt *mgmt, size_t len) 10729 { 10730 struct ieee802_11_elems *elems __free(kfree) = NULL; 10731 size_t ies_len; 10732 u16 status_code; 10733 u8 *pos, dialog_token; 10734 10735 if (!ieee80211_mgd_epcs_supp(sdata)) 10736 return; 10737 10738 /* Handle dialog token and status code */ 10739 pos = mgmt->u.action.u.epcs.variable; 10740 dialog_token = *pos; 10741 status_code = get_unaligned_le16(pos + 1); 10742 10743 /* An EPCS enable response with dialog token == 0 is an unsolicited 10744 * notification from the AP MLD. In such a case, EPCS should already be 10745 * enabled and status must be success 10746 */ 10747 if (!dialog_token && 10748 (!sdata->u.mgd.epcs.enabled || 10749 status_code != WLAN_STATUS_SUCCESS)) 10750 return; 10751 10752 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 10753 return; 10754 10755 sdata->u.mgd.epcs.dialog_token = 0; 10756 10757 if (status_code != WLAN_STATUS_SUCCESS) 10758 return; 10759 10760 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10761 ies_len = len - offsetof(struct ieee80211_mgmt, 10762 u.action.u.epcs.variable) - 10763 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10764 10765 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 10766 if (!elems) 10767 return; 10768 10769 ieee80211_ml_epcs(sdata, elems); 10770 ieee80211_epcs_changed(sdata, true); 10771 } 10772 10773 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 10774 struct ieee80211_mgmt *mgmt, size_t len) 10775 { 10776 if (!ieee80211_vif_is_mld(&sdata->vif) || 10777 !sdata->u.mgd.epcs.enabled) 10778 return; 10779 10780 ieee80211_epcs_teardown(sdata); 10781 ieee80211_epcs_changed(sdata, false); 10782 } 10783