1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2025 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #include <kunit/static_stub.h> 35 36 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 37 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 38 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 39 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 40 #define IEEE80211_AUTH_MAX_TRIES 3 41 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 42 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 43 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 44 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 45 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 46 #define IEEE80211_ASSOC_MAX_TRIES 3 47 48 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 49 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 50 51 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 52 53 static int max_nullfunc_tries = 2; 54 module_param(max_nullfunc_tries, int, 0644); 55 MODULE_PARM_DESC(max_nullfunc_tries, 56 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 57 58 static int max_probe_tries = 5; 59 module_param(max_probe_tries, int, 0644); 60 MODULE_PARM_DESC(max_probe_tries, 61 "Maximum probe tries before disconnecting (reason 4)."); 62 63 /* 64 * Beacon loss timeout is calculated as N frames times the 65 * advertised beacon interval. This may need to be somewhat 66 * higher than what hardware might detect to account for 67 * delays in the host processing frames. But since we also 68 * probe on beacon miss before declaring the connection lost 69 * default to what we want. 70 */ 71 static int beacon_loss_count = 7; 72 module_param(beacon_loss_count, int, 0644); 73 MODULE_PARM_DESC(beacon_loss_count, 74 "Number of beacon intervals before we decide beacon was lost."); 75 76 /* 77 * Time the connection can be idle before we probe 78 * it to see if we can still talk to the AP. 79 */ 80 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 81 /* 82 * Time we wait for a probe response after sending 83 * a probe request because of beacon loss or for 84 * checking the connection still works. 85 */ 86 static int probe_wait_ms = 500; 87 module_param(probe_wait_ms, int, 0644); 88 MODULE_PARM_DESC(probe_wait_ms, 89 "Maximum time(ms) to wait for probe response" 90 " before disconnecting (reason 4)."); 91 92 /* 93 * How many Beacon frames need to have been used in average signal strength 94 * before starting to indicate signal change events. 95 */ 96 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 97 98 /* 99 * We can have multiple work items (and connection probing) 100 * scheduling this timer, but we need to take care to only 101 * reschedule it when it should fire _earlier_ than it was 102 * asked for before, or if it's not pending right now. This 103 * function ensures that. Note that it then is required to 104 * run this function for all timeouts after the first one 105 * has happened -- the work that runs from this timer will 106 * do that. 107 */ 108 static void run_again(struct ieee80211_sub_if_data *sdata, 109 unsigned long timeout) 110 { 111 lockdep_assert_wiphy(sdata->local->hw.wiphy); 112 113 if (!timer_pending(&sdata->u.mgd.timer) || 114 time_before(timeout, sdata->u.mgd.timer.expires)) 115 mod_timer(&sdata->u.mgd.timer, timeout); 116 } 117 118 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 119 { 120 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 121 return; 122 123 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 124 return; 125 126 mod_timer(&sdata->u.mgd.bcn_mon_timer, 127 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 128 } 129 130 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 131 { 132 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 133 134 if (unlikely(!ifmgd->associated)) 135 return; 136 137 if (ifmgd->probe_send_count) 138 ifmgd->probe_send_count = 0; 139 140 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 141 return; 142 143 mod_timer(&ifmgd->conn_mon_timer, 144 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 145 } 146 147 static int ecw2cw(int ecw) 148 { 149 return (1 << ecw) - 1; 150 } 151 152 static enum ieee80211_conn_mode 153 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 154 struct ieee80211_channel *channel, 155 u32 vht_cap_info, 156 const struct ieee802_11_elems *elems, 157 bool ignore_ht_channel_mismatch, 158 const struct ieee80211_conn_settings *conn, 159 struct cfg80211_chan_def *chandef) 160 { 161 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 162 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 163 const struct ieee80211_he_operation *he_oper = elems->he_operation; 164 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 165 struct ieee80211_supported_band *sband = 166 sdata->local->hw.wiphy->bands[channel->band]; 167 struct cfg80211_chan_def vht_chandef; 168 bool no_vht = false; 169 u32 ht_cfreq; 170 171 if (ieee80211_hw_check(&sdata->local->hw, STRICT)) 172 ignore_ht_channel_mismatch = false; 173 174 *chandef = (struct cfg80211_chan_def) { 175 .chan = channel, 176 .width = NL80211_CHAN_WIDTH_20_NOHT, 177 .center_freq1 = channel->center_freq, 178 .freq1_offset = channel->freq_offset, 179 }; 180 181 /* get special S1G case out of the way */ 182 if (sband->band == NL80211_BAND_S1GHZ) { 183 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 184 sdata_info(sdata, 185 "Missing S1G Operation Element? Trying operating == primary\n"); 186 chandef->width = ieee80211_s1g_channel_width(channel); 187 } 188 189 return IEEE80211_CONN_MODE_S1G; 190 } 191 192 /* get special 6 GHz case out of the way */ 193 if (sband->band == NL80211_BAND_6GHZ) { 194 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 195 196 /* this is an error */ 197 if (conn->mode < IEEE80211_CONN_MODE_HE) 198 return IEEE80211_CONN_MODE_LEGACY; 199 200 if (!elems->he_6ghz_capa || !elems->he_cap) { 201 sdata_info(sdata, 202 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 203 return IEEE80211_CONN_MODE_LEGACY; 204 } 205 206 if (!eht_oper || !elems->eht_cap) { 207 eht_oper = NULL; 208 mode = IEEE80211_CONN_MODE_HE; 209 } 210 211 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 212 eht_oper, chandef)) { 213 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 214 return IEEE80211_CONN_MODE_LEGACY; 215 } 216 217 return mode; 218 } 219 220 /* now we have the progression HT, VHT, ... */ 221 if (conn->mode < IEEE80211_CONN_MODE_HT) 222 return IEEE80211_CONN_MODE_LEGACY; 223 224 if (!ht_oper || !elems->ht_cap_elem) 225 return IEEE80211_CONN_MODE_LEGACY; 226 227 chandef->width = NL80211_CHAN_WIDTH_20; 228 229 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 230 channel->band); 231 /* check that channel matches the right operating channel */ 232 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 233 /* 234 * It's possible that some APs are confused here; 235 * Netgear WNDR3700 sometimes reports 4 higher than 236 * the actual channel in association responses, but 237 * since we look at probe response/beacon data here 238 * it should be OK. 239 */ 240 sdata_info(sdata, 241 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 242 channel->center_freq, ht_cfreq, 243 ht_oper->primary_chan, channel->band); 244 return IEEE80211_CONN_MODE_LEGACY; 245 } 246 247 ieee80211_chandef_ht_oper(ht_oper, chandef); 248 249 if (conn->mode < IEEE80211_CONN_MODE_VHT) 250 return IEEE80211_CONN_MODE_HT; 251 252 vht_chandef = *chandef; 253 254 /* 255 * having he_cap/he_oper parsed out implies we're at 256 * least operating as HE STA 257 */ 258 if (elems->he_cap && he_oper && 259 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 260 struct ieee80211_vht_operation he_oper_vht_cap; 261 262 /* 263 * Set only first 3 bytes (other 2 aren't used in 264 * ieee80211_chandef_vht_oper() anyway) 265 */ 266 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 267 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 268 269 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 270 &he_oper_vht_cap, ht_oper, 271 &vht_chandef)) { 272 sdata_info(sdata, 273 "HE AP VHT information is invalid, disabling HE\n"); 274 /* this will cause us to re-parse as VHT STA */ 275 return IEEE80211_CONN_MODE_VHT; 276 } 277 } else if (!vht_oper || !elems->vht_cap_elem) { 278 if (sband->band == NL80211_BAND_5GHZ) { 279 sdata_info(sdata, 280 "VHT information is missing, disabling VHT\n"); 281 return IEEE80211_CONN_MODE_HT; 282 } 283 no_vht = true; 284 } else if (sband->band == NL80211_BAND_2GHZ) { 285 no_vht = true; 286 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 287 vht_cap_info, 288 vht_oper, ht_oper, 289 &vht_chandef)) { 290 sdata_info(sdata, 291 "AP VHT information is invalid, disabling VHT\n"); 292 return IEEE80211_CONN_MODE_HT; 293 } 294 295 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 296 sdata_info(sdata, 297 "AP VHT information doesn't match HT, disabling VHT\n"); 298 return IEEE80211_CONN_MODE_HT; 299 } 300 301 *chandef = vht_chandef; 302 303 /* stick to current max mode if we or the AP don't have HE */ 304 if (conn->mode < IEEE80211_CONN_MODE_HE || 305 !elems->he_operation || !elems->he_cap) { 306 if (no_vht) 307 return IEEE80211_CONN_MODE_HT; 308 return IEEE80211_CONN_MODE_VHT; 309 } 310 311 /* stick to HE if we or the AP don't have EHT */ 312 if (conn->mode < IEEE80211_CONN_MODE_EHT || 313 !eht_oper || !elems->eht_cap) 314 return IEEE80211_CONN_MODE_HE; 315 316 /* 317 * handle the case that the EHT operation indicates that it holds EHT 318 * operation information (in case that the channel width differs from 319 * the channel width reported in HT/VHT/HE). 320 */ 321 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 322 struct cfg80211_chan_def eht_chandef = *chandef; 323 324 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 325 &eht_chandef); 326 327 eht_chandef.punctured = 328 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 329 330 if (!cfg80211_chandef_valid(&eht_chandef)) { 331 sdata_info(sdata, 332 "AP EHT information is invalid, disabling EHT\n"); 333 return IEEE80211_CONN_MODE_HE; 334 } 335 336 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 337 sdata_info(sdata, 338 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 339 return IEEE80211_CONN_MODE_HE; 340 } 341 342 *chandef = eht_chandef; 343 } 344 345 return IEEE80211_CONN_MODE_EHT; 346 } 347 348 static bool 349 ieee80211_verify_sta_ht_mcs_support(struct ieee80211_sub_if_data *sdata, 350 struct ieee80211_supported_band *sband, 351 const struct ieee80211_ht_operation *ht_op) 352 { 353 struct ieee80211_sta_ht_cap sta_ht_cap; 354 int i; 355 356 if (sband->band == NL80211_BAND_6GHZ) 357 return true; 358 359 if (!ht_op) 360 return false; 361 362 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 363 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 364 365 /* 366 * P802.11REVme/D7.0 - 6.5.4.2.4 367 * ... 368 * If the MLME of an HT STA receives an MLME-JOIN.request primitive 369 * with the SelectedBSS parameter containing a Basic HT-MCS Set field 370 * in the HT Operation parameter that contains any unsupported MCSs, 371 * the MLME response in the resulting MLME-JOIN.confirm primitive shall 372 * contain a ResultCode parameter that is not set to the value SUCCESS. 373 * ... 374 */ 375 376 /* Simply check that all basic rates are in the STA RX mask */ 377 for (i = 0; i < IEEE80211_HT_MCS_MASK_LEN; i++) { 378 if ((ht_op->basic_set[i] & sta_ht_cap.mcs.rx_mask[i]) != 379 ht_op->basic_set[i]) 380 return false; 381 } 382 383 return true; 384 } 385 386 static bool 387 ieee80211_verify_sta_vht_mcs_support(struct ieee80211_sub_if_data *sdata, 388 int link_id, 389 struct ieee80211_supported_band *sband, 390 const struct ieee80211_vht_operation *vht_op) 391 { 392 struct ieee80211_sta_vht_cap sta_vht_cap; 393 u16 ap_min_req_set, sta_rx_mcs_map, sta_tx_mcs_map; 394 int nss; 395 396 if (sband->band != NL80211_BAND_5GHZ) 397 return true; 398 399 if (!vht_op) 400 return false; 401 402 memcpy(&sta_vht_cap, &sband->vht_cap, sizeof(sta_vht_cap)); 403 ieee80211_apply_vhtcap_overrides(sdata, &sta_vht_cap); 404 405 ap_min_req_set = le16_to_cpu(vht_op->basic_mcs_set); 406 sta_rx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.rx_mcs_map); 407 sta_tx_mcs_map = le16_to_cpu(sta_vht_cap.vht_mcs.tx_mcs_map); 408 409 /* 410 * Many APs are incorrectly advertising an all-zero value here, 411 * which really means MCS 0-7 are required for 1-8 streams, but 412 * they don't really mean it that way. 413 * Some other APs are incorrectly advertising 3 spatial streams 414 * with MCS 0-7 are required, but don't really mean it that way 415 * and we'll connect only with HT, rather than even HE. 416 * As a result, unfortunately the VHT basic MCS/NSS set cannot 417 * be used at all, so check it only in strict mode. 418 */ 419 if (!ieee80211_hw_check(&sdata->local->hw, STRICT)) 420 return true; 421 422 /* 423 * P802.11REVme/D7.0 - 6.5.4.2.4 424 * ... 425 * If the MLME of a VHT STA receives an MLME-JOIN.request primitive 426 * with a SelectedBSS parameter containing a Basic VHT-MCS And NSS Set 427 * field in the VHT Operation parameter that contains any unsupported 428 * <VHT-MCS, NSS> tuple, the MLME response in the resulting 429 * MLME-JOIN.confirm primitive shall contain a ResultCode parameter 430 * that is not set to the value SUCCESS. 431 * ... 432 */ 433 for (nss = 8; nss > 0; nss--) { 434 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 435 u8 sta_rx_val; 436 u8 sta_tx_val; 437 438 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 439 continue; 440 441 sta_rx_val = (sta_rx_mcs_map >> (2 * (nss - 1))) & 3; 442 sta_tx_val = (sta_tx_mcs_map >> (2 * (nss - 1))) & 3; 443 444 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 445 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 446 sta_rx_val < ap_op_val || sta_tx_val < ap_op_val) { 447 link_id_info(sdata, link_id, 448 "Missing mandatory rates for %d Nss, rx %d, tx %d oper %d, disable VHT\n", 449 nss, sta_rx_val, sta_tx_val, ap_op_val); 450 return false; 451 } 452 } 453 454 return true; 455 } 456 457 static bool 458 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 459 int link_id, 460 const struct ieee80211_he_cap_elem *he_cap, 461 const struct ieee80211_he_operation *he_op) 462 { 463 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 464 u16 mcs_80_map_tx, mcs_80_map_rx; 465 u16 ap_min_req_set; 466 int nss; 467 468 if (!he_cap) 469 return false; 470 471 /* mcs_nss is right after he_cap info */ 472 he_mcs_nss_supp = (void *)(he_cap + 1); 473 474 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 475 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 476 477 /* P802.11-REVme/D0.3 478 * 27.1.1 Introduction to the HE PHY 479 * ... 480 * An HE STA shall support the following features: 481 * ... 482 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 483 * supported channel widths for HE SU PPDUs 484 */ 485 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 486 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 487 link_id_info(sdata, link_id, 488 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 489 mcs_80_map_tx, mcs_80_map_rx); 490 return false; 491 } 492 493 if (!he_op) 494 return true; 495 496 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 497 498 /* 499 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 500 * zeroes, which is nonsense, and completely inconsistent with itself 501 * (it doesn't have 8 streams). Accept the settings in this case anyway. 502 */ 503 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 504 return true; 505 506 /* make sure the AP is consistent with itself 507 * 508 * P802.11-REVme/D0.3 509 * 26.17.1 Basic HE BSS operation 510 * 511 * A STA that is operating in an HE BSS shall be able to receive and 512 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 513 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 514 * MLME-START.request primitive and shall be able to receive at each of 515 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 516 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 517 * primitive 518 */ 519 for (nss = 8; nss > 0; nss--) { 520 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 521 u8 ap_rx_val; 522 u8 ap_tx_val; 523 524 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 525 continue; 526 527 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 528 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 529 530 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 531 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 532 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 533 link_id_info(sdata, link_id, 534 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 535 nss, ap_rx_val, ap_tx_val, ap_op_val); 536 return false; 537 } 538 } 539 540 return true; 541 } 542 543 static bool 544 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 545 struct ieee80211_supported_band *sband, 546 const struct ieee80211_he_operation *he_op) 547 { 548 const struct ieee80211_sta_he_cap *sta_he_cap = 549 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 550 u16 ap_min_req_set; 551 int i; 552 553 if (!sta_he_cap || !he_op) 554 return false; 555 556 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 557 558 /* 559 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 560 * zeroes, which is nonsense, and completely inconsistent with itself 561 * (it doesn't have 8 streams). Accept the settings in this case anyway. 562 */ 563 if (!ieee80211_hw_check(&sdata->local->hw, STRICT) && !ap_min_req_set) 564 return true; 565 566 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 567 for (i = 0; i < 3; i++) { 568 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 569 &sta_he_cap->he_mcs_nss_supp; 570 u16 sta_mcs_map_rx = 571 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 572 u16 sta_mcs_map_tx = 573 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 574 u8 nss; 575 bool verified = true; 576 577 /* 578 * For each band there is a maximum of 8 spatial streams 579 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 580 * of 2 bits per NSS (1-8), with the values defined in enum 581 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 582 * capabilities aren't less than the AP's minimum requirements 583 * for this HE BSS per SS. 584 * It is enough to find one such band that meets the reqs. 585 */ 586 for (nss = 8; nss > 0; nss--) { 587 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 588 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 589 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 590 591 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 592 continue; 593 594 /* 595 * Make sure the HE AP doesn't require MCSs that aren't 596 * supported by the client as required by spec 597 * 598 * P802.11-REVme/D0.3 599 * 26.17.1 Basic HE BSS operation 600 * 601 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 602 * a BSS, unless it supports (i.e., is able to both transmit and 603 * receive using) all of the <HE-MCS, NSS> tuples in the basic 604 * HE-MCS and NSS set. 605 */ 606 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 607 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 608 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 609 verified = false; 610 break; 611 } 612 } 613 614 if (verified) 615 return true; 616 } 617 618 /* If here, STA doesn't meet AP's HE min requirements */ 619 return false; 620 } 621 622 static u8 623 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 624 const struct ieee80211_sta_eht_cap *sta_eht_cap, 625 unsigned int idx, int bw) 626 { 627 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 628 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 629 630 /* handle us being a 20 MHz-only EHT STA - with four values 631 * for MCS 0-7, 8-9, 10-11, 12-13. 632 */ 633 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 634 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 635 636 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 637 if (idx > 0) 638 idx--; 639 640 switch (bw) { 641 case 0: 642 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 643 case 1: 644 if (!(he_phy_cap0 & 645 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 646 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 647 return 0xff; /* pass check */ 648 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 649 case 2: 650 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 651 return 0xff; /* pass check */ 652 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 653 } 654 655 WARN_ON(1); 656 return 0; 657 } 658 659 static bool 660 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 661 struct ieee80211_supported_band *sband, 662 const struct ieee80211_eht_operation *eht_op) 663 { 664 const struct ieee80211_sta_he_cap *sta_he_cap = 665 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 666 const struct ieee80211_sta_eht_cap *sta_eht_cap = 667 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 668 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 669 unsigned int i; 670 671 if (!sta_he_cap || !sta_eht_cap || !eht_op) 672 return false; 673 674 req = &eht_op->basic_mcs_nss; 675 676 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 677 u8 req_rx_nss, req_tx_nss; 678 unsigned int bw; 679 680 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 681 IEEE80211_EHT_MCS_NSS_RX); 682 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 683 IEEE80211_EHT_MCS_NSS_TX); 684 685 for (bw = 0; bw < 3; bw++) { 686 u8 have, have_rx_nss, have_tx_nss; 687 688 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 689 sta_eht_cap, 690 i, bw); 691 have_rx_nss = u8_get_bits(have, 692 IEEE80211_EHT_MCS_NSS_RX); 693 have_tx_nss = u8_get_bits(have, 694 IEEE80211_EHT_MCS_NSS_TX); 695 696 if (req_rx_nss > have_rx_nss || 697 req_tx_nss > have_tx_nss) 698 return false; 699 } 700 } 701 702 return true; 703 } 704 705 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 706 const u8 *supp_rates, 707 unsigned int supp_rates_len, 708 const u8 *ext_supp_rates, 709 unsigned int ext_supp_rates_len, 710 u32 *rates, u32 *basic_rates, 711 unsigned long *unknown_rates_selectors, 712 bool *have_higher_than_11mbit, 713 int *min_rate, int *min_rate_index) 714 { 715 int i, j; 716 717 for (i = 0; i < supp_rates_len + ext_supp_rates_len; i++) { 718 u8 supp_rate = i < supp_rates_len ? 719 supp_rates[i] : 720 ext_supp_rates[i - supp_rates_len]; 721 int rate = supp_rate & 0x7f; 722 bool is_basic = !!(supp_rate & 0x80); 723 724 if ((rate * 5) > 110 && have_higher_than_11mbit) 725 *have_higher_than_11mbit = true; 726 727 /* 728 * Skip membership selectors since they're not rates. 729 * 730 * Note: Even though the membership selector and the basic 731 * rate flag share the same bit, they are not exactly 732 * the same. 733 */ 734 if (is_basic && rate >= BSS_MEMBERSHIP_SELECTOR_MIN) { 735 if (unknown_rates_selectors) 736 set_bit(rate, unknown_rates_selectors); 737 continue; 738 } 739 740 for (j = 0; j < sband->n_bitrates; j++) { 741 struct ieee80211_rate *br; 742 int brate; 743 744 br = &sband->bitrates[j]; 745 746 brate = DIV_ROUND_UP(br->bitrate, 5); 747 if (brate == rate) { 748 if (rates) 749 *rates |= BIT(j); 750 if (is_basic && basic_rates) 751 *basic_rates |= BIT(j); 752 if (min_rate && (rate * 5) < *min_rate) { 753 *min_rate = rate * 5; 754 if (min_rate_index) 755 *min_rate_index = j; 756 } 757 break; 758 } 759 } 760 761 /* Handle an unknown entry as if it is an unknown selector */ 762 if (is_basic && unknown_rates_selectors && j == sband->n_bitrates) 763 set_bit(rate, unknown_rates_selectors); 764 } 765 } 766 767 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 768 const struct cfg80211_chan_def *chandef, 769 u32 prohibited_flags) 770 { 771 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 772 chandef, prohibited_flags)) 773 return false; 774 775 if (chandef->punctured && 776 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 777 return false; 778 779 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 780 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 781 return false; 782 783 return true; 784 } 785 786 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 787 { 788 if (c->width == NL80211_CHAN_WIDTH_80P80) 789 return 4 + 4; 790 791 return cfg80211_chandef_get_width(c) / 20; 792 } 793 794 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 795 { 796 switch (c->width) { 797 case NL80211_CHAN_WIDTH_20: 798 case NL80211_CHAN_WIDTH_20_NOHT: 799 return 1; 800 case NL80211_CHAN_WIDTH_40: 801 return 2; 802 case NL80211_CHAN_WIDTH_80P80: 803 case NL80211_CHAN_WIDTH_80: 804 return 3; 805 case NL80211_CHAN_WIDTH_160: 806 return 4; 807 case NL80211_CHAN_WIDTH_320: 808 return 5; 809 default: 810 WARN_ON(1); 811 return 0; 812 } 813 } 814 815 VISIBLE_IF_MAC80211_KUNIT int 816 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 817 u8 n_partial_subchans) 818 { 819 int n = ieee80211_chandef_num_subchans(ap); 820 struct cfg80211_chan_def tmp = *ap; 821 int offset = 0; 822 823 /* 824 * Given a chandef (in this context, it's the AP's) and a number 825 * of subchannels that we want to look at ('n_partial_subchans'), 826 * calculate the offset in number of subchannels between the full 827 * and the subset with the desired width. 828 */ 829 830 /* same number of subchannels means no offset, obviously */ 831 if (n == n_partial_subchans) 832 return 0; 833 834 /* don't WARN - misconfigured APs could cause this if their N > width */ 835 if (n < n_partial_subchans) 836 return 0; 837 838 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 839 u32 prev = tmp.center_freq1; 840 841 ieee80211_chandef_downgrade(&tmp, NULL); 842 843 /* 844 * if center_freq moved up, half the original channels 845 * are gone now but were below, so increase offset 846 */ 847 if (prev < tmp.center_freq1) 848 offset += ieee80211_chandef_num_subchans(&tmp); 849 } 850 851 /* 852 * 80+80 with secondary 80 below primary - four subchannels for it 853 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 854 */ 855 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 856 ap->center_freq2 < ap->center_freq1) 857 offset += 4; 858 859 return offset; 860 } 861 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 862 863 VISIBLE_IF_MAC80211_KUNIT void 864 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 865 const struct cfg80211_chan_def *ap, 866 const struct cfg80211_chan_def *used) 867 { 868 u8 needed = ieee80211_chandef_num_subchans(used); 869 u8 have = ieee80211_chandef_num_subchans(ap); 870 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 871 u8 offset; 872 873 if (!psd->valid) 874 return; 875 876 /* if N is zero, all defaults were used, no point in rearranging */ 877 if (!psd->n) 878 goto out; 879 880 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 881 882 /* 883 * This assumes that 'N' is consistent with the HE channel, as 884 * it should be (otherwise the AP is broken). 885 * 886 * In psd->power we have values in the order 0..N, 0..K, where 887 * N+K should cover the entire channel per 'ap', but even if it 888 * doesn't then we've pre-filled 'unlimited' as defaults. 889 * 890 * But this is all the wrong order, we want to have them in the 891 * order of the 'used' channel. 892 * 893 * So for example, we could have a 320 MHz EHT AP, which has the 894 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 895 * seem to be considered for the TPE), as follows: 896 * 897 * EHT 320: | | | | | | | | | | | | | | | | | 898 * HE 80: | | | | | 899 * used 160: | | | | | | | | | 900 * 901 * N entries: |--|--|--|--| 902 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 903 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 904 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 905 * used chan: 0 1 2 3 4 5 6 7 906 * 907 * The idx in the power array ('power idx') is like this since it 908 * comes directly from the element's N and K entries in their 909 * element order, and those are this way for HE compatibility. 910 * 911 * Rearrange them as desired here, first by putting them into the 912 * 'full chan' order, and then selecting the necessary subset for 913 * the 'used chan'. 914 */ 915 916 /* first reorder according to AP channel */ 917 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 918 for (int i = 0; i < have; i++) { 919 if (i < offset) 920 tmp[i] = psd->power[i + psd->n]; 921 else if (i < offset + psd->n) 922 tmp[i] = psd->power[i - offset]; 923 else 924 tmp[i] = psd->power[i]; 925 } 926 927 /* 928 * and then select the subset for the used channel 929 * (set everything to defaults first in case a driver is confused) 930 */ 931 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 932 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 933 for (int i = 0; i < needed; i++) 934 psd->power[i] = tmp[offset + i]; 935 936 out: 937 /* limit, but don't lie if there are defaults in the data */ 938 if (needed < psd->count) 939 psd->count = needed; 940 } 941 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 942 943 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 944 const struct cfg80211_chan_def *ap, 945 const struct cfg80211_chan_def *used) 946 { 947 /* ignore this completely for narrow/invalid channels */ 948 if (!ieee80211_chandef_num_subchans(ap) || 949 !ieee80211_chandef_num_subchans(used)) { 950 ieee80211_clear_tpe(tpe); 951 return; 952 } 953 954 for (int i = 0; i < 2; i++) { 955 int needed_pwr_count; 956 957 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 958 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 959 960 /* limit this to the widths we actually need */ 961 needed_pwr_count = ieee80211_chandef_num_widths(used); 962 if (needed_pwr_count < tpe->max_local[i].count) 963 tpe->max_local[i].count = needed_pwr_count; 964 if (needed_pwr_count < tpe->max_reg_client[i].count) 965 tpe->max_reg_client[i].count = needed_pwr_count; 966 } 967 } 968 969 /* 970 * The AP part of the channel request is used to distinguish settings 971 * to the device used for wider bandwidth OFDMA. This is used in the 972 * channel context code to assign two channel contexts even if they're 973 * both for the same channel, if the AP bandwidths are incompatible. 974 * If not EHT (or driver override) then ap.chan == NULL indicates that 975 * there's no wider BW OFDMA used. 976 */ 977 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 978 struct ieee80211_chan_req *chanreq, 979 struct ieee80211_conn_settings *conn, 980 struct cfg80211_chan_def *ap_chandef) 981 { 982 chanreq->ap.chan = NULL; 983 984 if (conn->mode < IEEE80211_CONN_MODE_EHT) 985 return; 986 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 987 return; 988 989 chanreq->ap = *ap_chandef; 990 } 991 992 VISIBLE_IF_MAC80211_KUNIT struct ieee802_11_elems * 993 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 994 struct ieee80211_conn_settings *conn, 995 struct cfg80211_bss *cbss, int link_id, 996 struct ieee80211_chan_req *chanreq, 997 struct cfg80211_chan_def *ap_chandef, 998 unsigned long *userspace_selectors) 999 { 1000 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 1001 struct ieee80211_bss *bss = (void *)cbss->priv; 1002 struct ieee80211_channel *channel = cbss->channel; 1003 struct ieee80211_elems_parse_params parse_params = { 1004 .link_id = -1, 1005 .from_ap = true, 1006 .start = ies->data, 1007 .len = ies->len, 1008 }; 1009 struct ieee802_11_elems *elems; 1010 struct ieee80211_supported_band *sband; 1011 enum ieee80211_conn_mode ap_mode; 1012 unsigned long unknown_rates_selectors[BITS_TO_LONGS(128)] = {}; 1013 unsigned long sta_selectors[BITS_TO_LONGS(128)] = {}; 1014 int ret; 1015 1016 again: 1017 parse_params.mode = conn->mode; 1018 elems = ieee802_11_parse_elems_full(&parse_params); 1019 if (!elems) 1020 return ERR_PTR(-ENOMEM); 1021 1022 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 1023 elems, false, conn, ap_chandef); 1024 1025 /* this should be impossible since parsing depends on our mode */ 1026 if (WARN_ON(ap_mode > conn->mode)) { 1027 ret = -EINVAL; 1028 goto free; 1029 } 1030 1031 if (conn->mode != ap_mode) { 1032 conn->mode = ap_mode; 1033 kfree(elems); 1034 goto again; 1035 } 1036 1037 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 1038 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 1039 1040 sband = sdata->local->hw.wiphy->bands[channel->band]; 1041 1042 ieee80211_get_rates(sband, elems->supp_rates, elems->supp_rates_len, 1043 elems->ext_supp_rates, elems->ext_supp_rates_len, 1044 NULL, NULL, unknown_rates_selectors, NULL, NULL, 1045 NULL); 1046 1047 switch (channel->band) { 1048 case NL80211_BAND_S1GHZ: 1049 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 1050 ret = -EINVAL; 1051 goto free; 1052 } 1053 return elems; 1054 case NL80211_BAND_6GHZ: 1055 if (ap_mode < IEEE80211_CONN_MODE_HE) { 1056 link_id_info(sdata, link_id, 1057 "Rejecting non-HE 6/7 GHz connection"); 1058 ret = -EINVAL; 1059 goto free; 1060 } 1061 break; 1062 default: 1063 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 1064 ret = -EINVAL; 1065 goto free; 1066 } 1067 } 1068 1069 switch (ap_mode) { 1070 case IEEE80211_CONN_MODE_S1G: 1071 WARN_ON(1); 1072 ret = -EINVAL; 1073 goto free; 1074 case IEEE80211_CONN_MODE_LEGACY: 1075 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1076 break; 1077 case IEEE80211_CONN_MODE_HT: 1078 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1079 conn->bw_limit, 1080 IEEE80211_CONN_BW_LIMIT_40); 1081 break; 1082 case IEEE80211_CONN_MODE_VHT: 1083 case IEEE80211_CONN_MODE_HE: 1084 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1085 conn->bw_limit, 1086 IEEE80211_CONN_BW_LIMIT_160); 1087 break; 1088 case IEEE80211_CONN_MODE_EHT: 1089 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1090 conn->bw_limit, 1091 IEEE80211_CONN_BW_LIMIT_320); 1092 break; 1093 } 1094 1095 chanreq->oper = *ap_chandef; 1096 1097 bitmap_copy(sta_selectors, userspace_selectors, 128); 1098 if (conn->mode >= IEEE80211_CONN_MODE_HT) 1099 set_bit(BSS_MEMBERSHIP_SELECTOR_HT_PHY, sta_selectors); 1100 if (conn->mode >= IEEE80211_CONN_MODE_VHT) 1101 set_bit(BSS_MEMBERSHIP_SELECTOR_VHT_PHY, sta_selectors); 1102 if (conn->mode >= IEEE80211_CONN_MODE_HE) 1103 set_bit(BSS_MEMBERSHIP_SELECTOR_HE_PHY, sta_selectors); 1104 if (conn->mode >= IEEE80211_CONN_MODE_EHT) 1105 set_bit(BSS_MEMBERSHIP_SELECTOR_EHT_PHY, sta_selectors); 1106 1107 /* 1108 * We do not support EPD or GLK so never add them. 1109 * SAE_H2E is handled through userspace_selectors. 1110 */ 1111 1112 /* Check if we support all required features */ 1113 if (!bitmap_subset(unknown_rates_selectors, sta_selectors, 128)) { 1114 link_id_info(sdata, link_id, 1115 "required basic rate or BSS membership selectors not supported or disabled, rejecting connection\n"); 1116 ret = -EINVAL; 1117 goto free; 1118 } 1119 1120 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 1121 1122 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 1123 IEEE80211_CHAN_DISABLED)) { 1124 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 1125 ret = -EINVAL; 1126 goto free; 1127 } 1128 1129 ieee80211_chanreq_downgrade(chanreq, conn); 1130 } 1131 1132 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1133 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1134 IEEE80211_CHAN_NO_HE)) { 1135 conn->mode = IEEE80211_CONN_MODE_VHT; 1136 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1137 conn->bw_limit, 1138 IEEE80211_CONN_BW_LIMIT_160); 1139 } 1140 1141 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1142 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 1143 IEEE80211_CHAN_NO_EHT)) { 1144 conn->mode = IEEE80211_CONN_MODE_HE; 1145 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1146 conn->bw_limit, 1147 IEEE80211_CONN_BW_LIMIT_160); 1148 } 1149 1150 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 1151 link_id_info(sdata, link_id, 1152 "regulatory prevented using AP config, downgraded\n"); 1153 1154 if (conn->mode >= IEEE80211_CONN_MODE_HT && 1155 !ieee80211_verify_sta_ht_mcs_support(sdata, sband, 1156 elems->ht_operation)) { 1157 conn->mode = IEEE80211_CONN_MODE_LEGACY; 1158 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 1159 link_id_info(sdata, link_id, 1160 "required MCSes not supported, disabling HT\n"); 1161 } 1162 1163 if (conn->mode >= IEEE80211_CONN_MODE_VHT && 1164 !ieee80211_verify_sta_vht_mcs_support(sdata, link_id, sband, 1165 elems->vht_operation)) { 1166 conn->mode = IEEE80211_CONN_MODE_HT; 1167 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1168 conn->bw_limit, 1169 IEEE80211_CONN_BW_LIMIT_40); 1170 link_id_info(sdata, link_id, 1171 "required MCSes not supported, disabling VHT\n"); 1172 } 1173 1174 if (conn->mode >= IEEE80211_CONN_MODE_HE && 1175 (!ieee80211_verify_peer_he_mcs_support(sdata, link_id, 1176 (void *)elems->he_cap, 1177 elems->he_operation) || 1178 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 1179 elems->he_operation))) { 1180 conn->mode = IEEE80211_CONN_MODE_VHT; 1181 link_id_info(sdata, link_id, 1182 "required MCSes not supported, disabling HE\n"); 1183 } 1184 1185 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 1186 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 1187 elems->eht_operation)) { 1188 conn->mode = IEEE80211_CONN_MODE_HE; 1189 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 1190 conn->bw_limit, 1191 IEEE80211_CONN_BW_LIMIT_160); 1192 link_id_info(sdata, link_id, 1193 "required MCSes not supported, disabling EHT\n"); 1194 } 1195 1196 /* the mode can only decrease, so this must terminate */ 1197 if (ap_mode != conn->mode) { 1198 kfree(elems); 1199 goto again; 1200 } 1201 1202 mlme_link_id_dbg(sdata, link_id, 1203 "connecting with %s mode, max bandwidth %d MHz\n", 1204 ieee80211_conn_mode_str(conn->mode), 1205 20 * (1 << conn->bw_limit)); 1206 1207 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 1208 ret = -EINVAL; 1209 goto free; 1210 } 1211 1212 return elems; 1213 free: 1214 kfree(elems); 1215 return ERR_PTR(ret); 1216 } 1217 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_determine_chan_mode); 1218 1219 static int ieee80211_config_bw(struct ieee80211_link_data *link, 1220 struct ieee802_11_elems *elems, 1221 bool update, u64 *changed, 1222 const char *frame) 1223 { 1224 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 1225 struct ieee80211_sub_if_data *sdata = link->sdata; 1226 struct ieee80211_chan_req chanreq = {}; 1227 struct cfg80211_chan_def ap_chandef; 1228 enum ieee80211_conn_mode ap_mode; 1229 u32 vht_cap_info = 0; 1230 u16 ht_opmode; 1231 int ret; 1232 1233 /* don't track any bandwidth changes in legacy/S1G modes */ 1234 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1235 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1236 return 0; 1237 1238 if (elems->vht_cap_elem) 1239 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1240 1241 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1242 elems, true, &link->u.mgd.conn, 1243 &ap_chandef); 1244 1245 if (ap_mode != link->u.mgd.conn.mode) { 1246 link_info(link, 1247 "AP %pM appears to change mode (expected %s, found %s) in %s, disconnect\n", 1248 link->u.mgd.bssid, 1249 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1250 ieee80211_conn_mode_str(ap_mode), frame); 1251 return -EINVAL; 1252 } 1253 1254 chanreq.oper = ap_chandef; 1255 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1256 &ap_chandef); 1257 1258 /* 1259 * if HT operation mode changed store the new one - 1260 * this may be applicable even if channel is identical 1261 */ 1262 if (elems->ht_operation) { 1263 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1264 if (link->conf->ht_operation_mode != ht_opmode) { 1265 *changed |= BSS_CHANGED_HT; 1266 link->conf->ht_operation_mode = ht_opmode; 1267 } 1268 } 1269 1270 /* 1271 * Downgrade the new channel if we associated with restricted 1272 * bandwidth capabilities. For example, if we associated as a 1273 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1274 * or config reasons) then switching to a 40 MHz channel now 1275 * won't do us any good -- we couldn't use it with the AP. 1276 */ 1277 while (link->u.mgd.conn.bw_limit < 1278 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1279 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1280 1281 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1282 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1283 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1284 &chanreq.oper); 1285 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1286 link->conf->tpe = elems->tpe; 1287 *changed |= BSS_CHANGED_TPE; 1288 } 1289 } 1290 1291 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1292 return 0; 1293 1294 link_info(link, 1295 "AP %pM changed bandwidth in %s, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1296 link->u.mgd.bssid, frame, chanreq.oper.chan->center_freq, 1297 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1298 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1299 chanreq.oper.center_freq2); 1300 1301 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1302 sdata_info(sdata, 1303 "AP %pM changed caps/bw in %s in a way we can't support - disconnect\n", 1304 link->u.mgd.bssid, frame); 1305 return -EINVAL; 1306 } 1307 1308 if (!update) { 1309 link->conf->chanreq = chanreq; 1310 return 0; 1311 } 1312 1313 /* 1314 * We're tracking the current AP here, so don't do any further checks 1315 * here. This keeps us from playing ping-pong with regulatory, without 1316 * it the following can happen (for example): 1317 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1318 * - AP advertises regdom US 1319 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1320 * - we detect an unsupported channel and disconnect 1321 * - disconnect causes CRDA to reload world regdomain and the game 1322 * starts anew. 1323 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1324 * 1325 * It seems possible that there are still scenarios with CSA or real 1326 * bandwidth changes where a this could happen, but those cases are 1327 * less common and wouldn't completely prevent using the AP. 1328 */ 1329 1330 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1331 if (ret) { 1332 sdata_info(sdata, 1333 "AP %pM changed bandwidth in %s to incompatible one - disconnect\n", 1334 link->u.mgd.bssid, frame); 1335 return ret; 1336 } 1337 1338 cfg80211_schedule_channels_check(&sdata->wdev); 1339 return 0; 1340 } 1341 1342 /* frame sending functions */ 1343 1344 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1345 struct sk_buff *skb, u8 ap_ht_param, 1346 struct ieee80211_supported_band *sband, 1347 struct ieee80211_channel *channel, 1348 enum ieee80211_smps_mode smps, 1349 const struct ieee80211_conn_settings *conn) 1350 { 1351 u8 *pos; 1352 u32 flags = channel->flags; 1353 u16 cap; 1354 struct ieee80211_sta_ht_cap ht_cap; 1355 1356 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1357 1358 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1359 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1360 1361 /* determine capability flags */ 1362 cap = ht_cap.cap; 1363 1364 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1365 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1366 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1367 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1368 cap &= ~IEEE80211_HT_CAP_SGI_40; 1369 } 1370 break; 1371 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1372 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1373 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1374 cap &= ~IEEE80211_HT_CAP_SGI_40; 1375 } 1376 break; 1377 } 1378 1379 /* 1380 * If 40 MHz was disabled associate as though we weren't 1381 * capable of 40 MHz -- some broken APs will never fall 1382 * back to trying to transmit in 20 MHz. 1383 */ 1384 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1385 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1386 cap &= ~IEEE80211_HT_CAP_SGI_40; 1387 } 1388 1389 /* set SM PS mode properly */ 1390 cap &= ~IEEE80211_HT_CAP_SM_PS; 1391 switch (smps) { 1392 case IEEE80211_SMPS_AUTOMATIC: 1393 case IEEE80211_SMPS_NUM_MODES: 1394 WARN_ON(1); 1395 fallthrough; 1396 case IEEE80211_SMPS_OFF: 1397 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1398 IEEE80211_HT_CAP_SM_PS_SHIFT; 1399 break; 1400 case IEEE80211_SMPS_STATIC: 1401 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1402 IEEE80211_HT_CAP_SM_PS_SHIFT; 1403 break; 1404 case IEEE80211_SMPS_DYNAMIC: 1405 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1406 IEEE80211_HT_CAP_SM_PS_SHIFT; 1407 break; 1408 } 1409 1410 /* reserve and fill IE */ 1411 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1412 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1413 } 1414 1415 /* This function determines vht capability flags for the association 1416 * and builds the IE. 1417 * Note - the function returns true to own the MU-MIMO capability 1418 */ 1419 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1420 struct sk_buff *skb, 1421 struct ieee80211_supported_band *sband, 1422 struct ieee80211_vht_cap *ap_vht_cap, 1423 const struct ieee80211_conn_settings *conn) 1424 { 1425 struct ieee80211_local *local = sdata->local; 1426 u8 *pos; 1427 u32 cap; 1428 struct ieee80211_sta_vht_cap vht_cap; 1429 u32 mask, ap_bf_sts, our_bf_sts; 1430 bool mu_mimo_owner = false; 1431 1432 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1433 1434 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1435 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1436 1437 /* determine capability flags */ 1438 cap = vht_cap.cap; 1439 1440 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1441 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1442 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1443 } 1444 1445 /* 1446 * Some APs apparently get confused if our capabilities are better 1447 * than theirs, so restrict what we advertise in the assoc request. 1448 */ 1449 if (!ieee80211_hw_check(&local->hw, STRICT)) { 1450 if (!(ap_vht_cap->vht_cap_info & 1451 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1452 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1453 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1454 else if (!(ap_vht_cap->vht_cap_info & 1455 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1456 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1457 } 1458 1459 /* 1460 * If some other vif is using the MU-MIMO capability we cannot associate 1461 * using MU-MIMO - this will lead to contradictions in the group-id 1462 * mechanism. 1463 * Ownership is defined since association request, in order to avoid 1464 * simultaneous associations with MU-MIMO. 1465 */ 1466 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1467 bool disable_mu_mimo = false; 1468 struct ieee80211_sub_if_data *other; 1469 1470 list_for_each_entry(other, &local->interfaces, list) { 1471 if (other->vif.bss_conf.mu_mimo_owner) { 1472 disable_mu_mimo = true; 1473 break; 1474 } 1475 } 1476 if (disable_mu_mimo) 1477 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1478 else 1479 mu_mimo_owner = true; 1480 } 1481 1482 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1483 1484 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1485 our_bf_sts = cap & mask; 1486 1487 if (ap_bf_sts < our_bf_sts) { 1488 cap &= ~mask; 1489 cap |= ap_bf_sts; 1490 } 1491 1492 /* reserve and fill IE */ 1493 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1494 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1495 1496 return mu_mimo_owner; 1497 } 1498 1499 static void ieee80211_assoc_add_rates(struct ieee80211_local *local, 1500 struct sk_buff *skb, 1501 enum nl80211_chan_width width, 1502 struct ieee80211_supported_band *sband, 1503 struct ieee80211_mgd_assoc_data *assoc_data) 1504 { 1505 u32 rates; 1506 1507 if (assoc_data->supp_rates_len && 1508 !ieee80211_hw_check(&local->hw, STRICT)) { 1509 /* 1510 * Get all rates supported by the device and the AP as 1511 * some APs don't like getting a superset of their rates 1512 * in the association request (e.g. D-Link DAP 1353 in 1513 * b-only mode)... 1514 */ 1515 ieee80211_parse_bitrates(width, sband, 1516 assoc_data->supp_rates, 1517 assoc_data->supp_rates_len, 1518 &rates); 1519 } else { 1520 /* 1521 * In case AP not provide any supported rates information 1522 * before association, we send information element(s) with 1523 * all rates that we support. 1524 */ 1525 rates = ~0; 1526 } 1527 1528 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1529 WLAN_EID_SUPP_RATES); 1530 ieee80211_put_srates_elem(skb, sband, 0, ~rates, 1531 WLAN_EID_EXT_SUPP_RATES); 1532 } 1533 1534 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1535 const u8 *elems, 1536 size_t elems_len, 1537 size_t offset) 1538 { 1539 size_t noffset; 1540 1541 static const u8 before_ht[] = { 1542 WLAN_EID_SSID, 1543 WLAN_EID_SUPP_RATES, 1544 WLAN_EID_EXT_SUPP_RATES, 1545 WLAN_EID_PWR_CAPABILITY, 1546 WLAN_EID_SUPPORTED_CHANNELS, 1547 WLAN_EID_RSN, 1548 WLAN_EID_QOS_CAPA, 1549 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1550 WLAN_EID_MOBILITY_DOMAIN, 1551 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1552 WLAN_EID_RIC_DATA, /* reassoc only */ 1553 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1554 }; 1555 static const u8 after_ric[] = { 1556 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1557 WLAN_EID_HT_CAPABILITY, 1558 WLAN_EID_BSS_COEX_2040, 1559 /* luckily this is almost always there */ 1560 WLAN_EID_EXT_CAPABILITY, 1561 WLAN_EID_QOS_TRAFFIC_CAPA, 1562 WLAN_EID_TIM_BCAST_REQ, 1563 WLAN_EID_INTERWORKING, 1564 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1565 WLAN_EID_VHT_CAPABILITY, 1566 WLAN_EID_OPMODE_NOTIF, 1567 }; 1568 1569 if (!elems_len) 1570 return offset; 1571 1572 noffset = ieee80211_ie_split_ric(elems, elems_len, 1573 before_ht, 1574 ARRAY_SIZE(before_ht), 1575 after_ric, 1576 ARRAY_SIZE(after_ric), 1577 offset); 1578 skb_put_data(skb, elems + offset, noffset - offset); 1579 1580 return noffset; 1581 } 1582 1583 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1584 const u8 *elems, 1585 size_t elems_len, 1586 size_t offset) 1587 { 1588 static const u8 before_vht[] = { 1589 /* 1590 * no need to list the ones split off before HT 1591 * or generated here 1592 */ 1593 WLAN_EID_BSS_COEX_2040, 1594 WLAN_EID_EXT_CAPABILITY, 1595 WLAN_EID_QOS_TRAFFIC_CAPA, 1596 WLAN_EID_TIM_BCAST_REQ, 1597 WLAN_EID_INTERWORKING, 1598 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1599 }; 1600 size_t noffset; 1601 1602 if (!elems_len) 1603 return offset; 1604 1605 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1606 noffset = ieee80211_ie_split(elems, elems_len, 1607 before_vht, ARRAY_SIZE(before_vht), 1608 offset); 1609 skb_put_data(skb, elems + offset, noffset - offset); 1610 1611 return noffset; 1612 } 1613 1614 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1615 const u8 *elems, 1616 size_t elems_len, 1617 size_t offset) 1618 { 1619 static const u8 before_he[] = { 1620 /* 1621 * no need to list the ones split off before VHT 1622 * or generated here 1623 */ 1624 WLAN_EID_OPMODE_NOTIF, 1625 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1626 /* 11ai elements */ 1627 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1628 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1629 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1630 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1631 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1632 /* TODO: add 11ah/11aj/11ak elements */ 1633 }; 1634 size_t noffset; 1635 1636 if (!elems_len) 1637 return offset; 1638 1639 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1640 noffset = ieee80211_ie_split(elems, elems_len, 1641 before_he, ARRAY_SIZE(before_he), 1642 offset); 1643 skb_put_data(skb, elems + offset, noffset - offset); 1644 1645 return noffset; 1646 } 1647 1648 #define PRESENT_ELEMS_MAX 8 1649 #define PRESENT_ELEM_EXT_OFFS 0x100 1650 1651 static void 1652 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1653 struct sk_buff *skb, u16 capab, 1654 const struct element *ext_capa, 1655 const u16 *present_elems, 1656 struct ieee80211_mgd_assoc_data *assoc_data); 1657 1658 static size_t 1659 ieee80211_add_link_elems(struct ieee80211_sub_if_data *sdata, 1660 struct sk_buff *skb, u16 *capab, 1661 const struct element *ext_capa, 1662 const u8 *extra_elems, 1663 size_t extra_elems_len, 1664 unsigned int link_id, 1665 struct ieee80211_link_data *link, 1666 u16 *present_elems, 1667 struct ieee80211_mgd_assoc_data *assoc_data) 1668 { 1669 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1670 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1671 struct ieee80211_channel *chan = cbss->channel; 1672 const struct ieee80211_sband_iftype_data *iftd; 1673 struct ieee80211_local *local = sdata->local; 1674 struct ieee80211_supported_band *sband; 1675 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1676 struct ieee80211_chanctx_conf *chanctx_conf; 1677 enum ieee80211_smps_mode smps_mode; 1678 u16 orig_capab = *capab; 1679 size_t offset = 0; 1680 int present_elems_len = 0; 1681 u8 *pos; 1682 int i; 1683 1684 #define ADD_PRESENT_ELEM(id) do { \ 1685 /* need a last for termination - we use 0 == SSID */ \ 1686 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1687 present_elems[present_elems_len++] = (id); \ 1688 } while (0) 1689 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1690 1691 if (link) 1692 smps_mode = link->smps_mode; 1693 else if (sdata->u.mgd.powersave) 1694 smps_mode = IEEE80211_SMPS_DYNAMIC; 1695 else 1696 smps_mode = IEEE80211_SMPS_OFF; 1697 1698 if (link) { 1699 /* 1700 * 5/10 MHz scenarios are only viable without MLO, in which 1701 * case this pointer should be used ... All of this is a bit 1702 * unclear though, not sure this even works at all. 1703 */ 1704 rcu_read_lock(); 1705 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1706 if (chanctx_conf) 1707 width = chanctx_conf->def.width; 1708 rcu_read_unlock(); 1709 } 1710 1711 sband = local->hw.wiphy->bands[chan->band]; 1712 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1713 1714 if (sband->band == NL80211_BAND_2GHZ) { 1715 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1716 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1717 } 1718 1719 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1720 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1721 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1722 1723 if (sband->band != NL80211_BAND_S1GHZ) 1724 ieee80211_assoc_add_rates(local, skb, width, sband, assoc_data); 1725 1726 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1727 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1728 struct cfg80211_chan_def chandef = { 1729 .width = width, 1730 .chan = chan, 1731 }; 1732 1733 pos = skb_put(skb, 4); 1734 *pos++ = WLAN_EID_PWR_CAPABILITY; 1735 *pos++ = 2; 1736 *pos++ = 0; /* min tx power */ 1737 /* max tx power */ 1738 *pos++ = ieee80211_chandef_max_power(&chandef); 1739 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1740 } 1741 1742 /* 1743 * Per spec, we shouldn't include the list of channels if we advertise 1744 * support for extended channel switching, but we've always done that; 1745 * (for now?) apply this restriction only on the (new) 6 GHz band. 1746 */ 1747 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1748 (sband->band != NL80211_BAND_6GHZ || 1749 !ext_capa || ext_capa->datalen < 1 || 1750 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1751 /* TODO: get this in reg domain format */ 1752 pos = skb_put(skb, 2 * sband->n_channels + 2); 1753 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1754 *pos++ = 2 * sband->n_channels; 1755 for (i = 0; i < sband->n_channels; i++) { 1756 int cf = sband->channels[i].center_freq; 1757 1758 *pos++ = ieee80211_frequency_to_channel(cf); 1759 *pos++ = 1; /* one channel in the subband*/ 1760 } 1761 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1762 } 1763 1764 /* if present, add any custom IEs that go before HT */ 1765 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1766 extra_elems_len, 1767 offset); 1768 1769 if (sband->band != NL80211_BAND_6GHZ && 1770 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1771 ieee80211_add_ht_ie(sdata, skb, 1772 assoc_data->link[link_id].ap_ht_param, 1773 sband, chan, smps_mode, 1774 &assoc_data->link[link_id].conn); 1775 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1776 } 1777 1778 /* if present, add any custom IEs that go before VHT */ 1779 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1780 extra_elems_len, 1781 offset); 1782 1783 if (sband->band != NL80211_BAND_6GHZ && 1784 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1785 sband->vht_cap.vht_supported) { 1786 bool mu_mimo_owner = 1787 ieee80211_add_vht_ie(sdata, skb, sband, 1788 &assoc_data->link[link_id].ap_vht_cap, 1789 &assoc_data->link[link_id].conn); 1790 1791 if (link) 1792 link->conf->mu_mimo_owner = mu_mimo_owner; 1793 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1794 } 1795 1796 /* if present, add any custom IEs that go before HE */ 1797 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1798 extra_elems_len, 1799 offset); 1800 1801 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1802 ieee80211_put_he_cap(skb, sdata, sband, 1803 &assoc_data->link[link_id].conn); 1804 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1805 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1806 } 1807 1808 /* 1809 * careful - need to know about all the present elems before 1810 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1811 * we're going to put it after the ML element 1812 */ 1813 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1814 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1815 1816 if (link_id == assoc_data->assoc_link_id) 1817 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1818 present_elems, assoc_data); 1819 1820 /* crash if somebody gets it wrong */ 1821 present_elems = NULL; 1822 1823 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1824 ieee80211_put_eht_cap(skb, sdata, sband, 1825 &assoc_data->link[link_id].conn); 1826 1827 if (sband->band == NL80211_BAND_S1GHZ) { 1828 ieee80211_add_aid_request_ie(sdata, skb); 1829 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1830 } 1831 1832 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1833 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1834 1835 return offset; 1836 } 1837 1838 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1839 const u16 *outer, 1840 const u16 *inner) 1841 { 1842 unsigned int skb_len = skb->len; 1843 bool at_extension = false; 1844 bool added = false; 1845 int i, j; 1846 u8 *len, *list_len = NULL; 1847 1848 skb_put_u8(skb, WLAN_EID_EXTENSION); 1849 len = skb_put(skb, 1); 1850 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1851 1852 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1853 u16 elem = outer[i]; 1854 bool have_inner = false; 1855 1856 /* should at least be sorted in the sense of normal -> ext */ 1857 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1858 1859 /* switch to extension list */ 1860 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1861 at_extension = true; 1862 if (!list_len) 1863 skb_put_u8(skb, 0); 1864 list_len = NULL; 1865 } 1866 1867 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1868 if (elem == inner[j]) { 1869 have_inner = true; 1870 break; 1871 } 1872 } 1873 1874 if (have_inner) 1875 continue; 1876 1877 if (!list_len) { 1878 list_len = skb_put(skb, 1); 1879 *list_len = 0; 1880 } 1881 *list_len += 1; 1882 skb_put_u8(skb, (u8)elem); 1883 added = true; 1884 } 1885 1886 /* if we added a list but no extension list, make a zero-len one */ 1887 if (added && (!at_extension || !list_len)) 1888 skb_put_u8(skb, 0); 1889 1890 /* if nothing added remove extension element completely */ 1891 if (!added) 1892 skb_trim(skb, skb_len); 1893 else 1894 *len = skb->len - skb_len - 2; 1895 } 1896 1897 static void 1898 ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1899 struct sk_buff *skb, u16 capab, 1900 const struct element *ext_capa, 1901 const u16 *outer_present_elems, 1902 struct ieee80211_mgd_assoc_data *assoc_data) 1903 { 1904 struct ieee80211_local *local = sdata->local; 1905 struct ieee80211_multi_link_elem *ml_elem; 1906 struct ieee80211_mle_basic_common_info *common; 1907 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1908 __le16 eml_capa = 0, mld_capa_ops = 0; 1909 unsigned int link_id; 1910 u8 *ml_elem_len; 1911 void *capab_pos; 1912 1913 if (!ieee80211_vif_is_mld(&sdata->vif)) 1914 return; 1915 1916 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1917 ieee80211_vif_type_p2p(&sdata->vif)); 1918 if (ift_ext_capa) { 1919 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1920 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1921 } 1922 1923 skb_put_u8(skb, WLAN_EID_EXTENSION); 1924 ml_elem_len = skb_put(skb, 1); 1925 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1926 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1927 ml_elem->control = 1928 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1929 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1930 common = skb_put(skb, sizeof(*common)); 1931 common->len = sizeof(*common) + 1932 2; /* MLD capa/ops */ 1933 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1934 1935 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1936 if (eml_capa & 1937 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1938 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1939 common->len += 2; /* EML capabilities */ 1940 ml_elem->control |= 1941 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1942 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1943 } 1944 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1945 1946 /* Many APs have broken parsing of the extended MLD capa/ops field, 1947 * dropping (re-)association request frames or replying with association 1948 * response with a failure status if it's present. Without a clear 1949 * indication as to whether the AP supports parsing this field or not do 1950 * not include it in the common information unless strict mode is set. 1951 */ 1952 if (ieee80211_hw_check(&local->hw, STRICT) && 1953 assoc_data->ext_mld_capa_ops) { 1954 ml_elem->control |= 1955 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EXT_MLD_CAPA_OP); 1956 common->len += 2; 1957 skb_put_data(skb, &assoc_data->ext_mld_capa_ops, 1958 sizeof(assoc_data->ext_mld_capa_ops)); 1959 } 1960 1961 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1962 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1963 const u8 *extra_elems; 1964 size_t extra_elems_len; 1965 size_t extra_used; 1966 u8 *subelem_len = NULL; 1967 __le16 ctrl; 1968 1969 if (!assoc_data->link[link_id].bss || 1970 link_id == assoc_data->assoc_link_id) 1971 continue; 1972 1973 extra_elems = assoc_data->link[link_id].elems; 1974 extra_elems_len = assoc_data->link[link_id].elems_len; 1975 1976 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1977 subelem_len = skb_put(skb, 1); 1978 1979 ctrl = cpu_to_le16(link_id | 1980 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1981 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1982 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1983 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1984 skb_put_data(skb, assoc_data->link[link_id].addr, 1985 ETH_ALEN); 1986 /* 1987 * Now add the contents of the (re)association request, 1988 * but the "listen interval" and "current AP address" 1989 * (if applicable) are skipped. So we only have 1990 * the capability field (remember the position and fill 1991 * later), followed by the elements added below by 1992 * calling ieee80211_add_link_elems(). 1993 */ 1994 capab_pos = skb_put(skb, 2); 1995 1996 extra_used = ieee80211_add_link_elems(sdata, skb, &capab, 1997 ext_capa, 1998 extra_elems, 1999 extra_elems_len, 2000 link_id, NULL, 2001 link_present_elems, 2002 assoc_data); 2003 if (extra_elems) 2004 skb_put_data(skb, extra_elems + extra_used, 2005 extra_elems_len - extra_used); 2006 2007 put_unaligned_le16(capab, capab_pos); 2008 2009 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 2010 link_present_elems); 2011 2012 ieee80211_fragment_element(skb, subelem_len, 2013 IEEE80211_MLE_SUBELEM_FRAGMENT); 2014 } 2015 2016 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 2017 } 2018 2019 static int 2020 ieee80211_link_common_elems_size(struct ieee80211_sub_if_data *sdata, 2021 enum nl80211_iftype iftype, 2022 struct cfg80211_bss *cbss, 2023 size_t elems_len) 2024 { 2025 struct ieee80211_local *local = sdata->local; 2026 const struct ieee80211_sband_iftype_data *iftd; 2027 struct ieee80211_supported_band *sband; 2028 size_t size = 0; 2029 2030 if (!cbss) 2031 return size; 2032 2033 sband = local->hw.wiphy->bands[cbss->channel->band]; 2034 2035 /* add STA profile elements length */ 2036 size += elems_len; 2037 2038 /* and supported rates length */ 2039 size += 4 + sband->n_bitrates; 2040 2041 /* supported channels */ 2042 size += 2 + 2 * sband->n_channels; 2043 2044 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 2045 if (iftd) 2046 size += iftd->vendor_elems.len; 2047 2048 /* power capability */ 2049 size += 4; 2050 2051 /* HT, VHT, HE, EHT */ 2052 size += 2 + sizeof(struct ieee80211_ht_cap); 2053 size += 2 + sizeof(struct ieee80211_vht_cap); 2054 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 2055 sizeof(struct ieee80211_he_mcs_nss_supp) + 2056 IEEE80211_HE_PPE_THRES_MAX_LEN; 2057 2058 if (sband->band == NL80211_BAND_6GHZ) 2059 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 2060 2061 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 2062 sizeof(struct ieee80211_eht_mcs_nss_supp) + 2063 IEEE80211_EHT_PPE_THRES_MAX_LEN; 2064 2065 return size; 2066 } 2067 2068 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 2069 { 2070 struct ieee80211_local *local = sdata->local; 2071 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2072 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 2073 struct ieee80211_link_data *link; 2074 struct sk_buff *skb; 2075 struct ieee80211_mgmt *mgmt; 2076 u8 *pos, qos_info, *ie_start; 2077 size_t offset, noffset; 2078 u16 capab = 0, link_capab; 2079 __le16 listen_int; 2080 struct element *ext_capa = NULL; 2081 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 2082 struct ieee80211_prep_tx_info info = {}; 2083 unsigned int link_id, n_links = 0; 2084 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 2085 void *capab_pos; 2086 size_t size; 2087 int ret; 2088 2089 /* we know it's writable, cast away the const */ 2090 if (assoc_data->ie_len) 2091 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 2092 assoc_data->ie, 2093 assoc_data->ie_len); 2094 2095 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2096 2097 size = local->hw.extra_tx_headroom + 2098 sizeof(*mgmt) + /* bit too much but doesn't matter */ 2099 2 + assoc_data->ssid_len + /* SSID */ 2100 assoc_data->ie_len + /* extra IEs */ 2101 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 2102 9; /* WMM */ 2103 2104 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2105 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2106 size_t elems_len = assoc_data->link[link_id].elems_len; 2107 2108 if (!cbss) 2109 continue; 2110 2111 n_links++; 2112 2113 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 2114 elems_len); 2115 2116 /* non-inheritance element */ 2117 size += 2 + 2 + PRESENT_ELEMS_MAX; 2118 2119 /* should be the same across all BSSes */ 2120 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 2121 capab |= WLAN_CAPABILITY_PRIVACY; 2122 } 2123 2124 if (ieee80211_vif_is_mld(&sdata->vif)) { 2125 /* consider the multi-link element with STA profile */ 2126 size += sizeof(struct ieee80211_multi_link_elem); 2127 /* max common info field in basic multi-link element */ 2128 size += sizeof(struct ieee80211_mle_basic_common_info) + 2129 2 + /* capa & op */ 2130 2 + /* ext capa & op */ 2131 2; /* EML capa */ 2132 2133 /* 2134 * The capability elements were already considered above; 2135 * note this over-estimates a bit because there's no 2136 * STA profile for the assoc link. 2137 */ 2138 size += (n_links - 1) * 2139 (1 + 1 + /* subelement ID/length */ 2140 2 + /* STA control */ 2141 1 + ETH_ALEN + 2 /* STA Info field */); 2142 } 2143 2144 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 2145 if (WARN_ON(!link)) 2146 return -EINVAL; 2147 2148 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 2149 return -EINVAL; 2150 2151 skb = alloc_skb(size, GFP_KERNEL); 2152 if (!skb) 2153 return -ENOMEM; 2154 2155 skb_reserve(skb, local->hw.extra_tx_headroom); 2156 2157 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 2158 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 2159 2160 /* Set MBSSID support for HE AP if needed */ 2161 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 2162 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 2163 ext_capa && ext_capa->datalen >= 3) 2164 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 2165 2166 mgmt = skb_put_zero(skb, 24); 2167 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 2168 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 2169 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 2170 2171 listen_int = cpu_to_le16(assoc_data->s1g ? 2172 ieee80211_encode_usf(local->hw.conf.listen_interval) : 2173 local->hw.conf.listen_interval); 2174 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 2175 skb_put(skb, 10); 2176 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2177 IEEE80211_STYPE_REASSOC_REQ); 2178 capab_pos = &mgmt->u.reassoc_req.capab_info; 2179 mgmt->u.reassoc_req.listen_interval = listen_int; 2180 memcpy(mgmt->u.reassoc_req.current_ap, 2181 assoc_data->prev_ap_addr, ETH_ALEN); 2182 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 2183 } else { 2184 skb_put(skb, 4); 2185 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 2186 IEEE80211_STYPE_ASSOC_REQ); 2187 capab_pos = &mgmt->u.assoc_req.capab_info; 2188 mgmt->u.assoc_req.listen_interval = listen_int; 2189 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 2190 } 2191 2192 /* SSID */ 2193 pos = skb_put(skb, 2 + assoc_data->ssid_len); 2194 ie_start = pos; 2195 *pos++ = WLAN_EID_SSID; 2196 *pos++ = assoc_data->ssid_len; 2197 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 2198 2199 /* 2200 * This bit is technically reserved, so it shouldn't matter for either 2201 * the AP or us, but it also means we shouldn't set it. However, we've 2202 * always set it in the past, and apparently some EHT APs check that 2203 * we don't set it. To avoid interoperability issues with old APs that 2204 * for some reason check it and want it to be set, set the bit for all 2205 * pre-EHT connections as we used to do. 2206 */ 2207 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT && 2208 !ieee80211_hw_check(&local->hw, STRICT)) 2209 capab |= WLAN_CAPABILITY_ESS; 2210 2211 /* add the elements for the assoc (main) link */ 2212 link_capab = capab; 2213 offset = ieee80211_add_link_elems(sdata, skb, &link_capab, 2214 ext_capa, 2215 assoc_data->ie, 2216 assoc_data->ie_len, 2217 assoc_data->assoc_link_id, link, 2218 present_elems, assoc_data); 2219 put_unaligned_le16(link_capab, capab_pos); 2220 2221 /* if present, add any custom non-vendor IEs */ 2222 if (assoc_data->ie_len) { 2223 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 2224 assoc_data->ie_len, 2225 offset); 2226 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2227 offset = noffset; 2228 } 2229 2230 if (assoc_data->wmm) { 2231 if (assoc_data->uapsd) { 2232 qos_info = ifmgd->uapsd_queues; 2233 qos_info |= (ifmgd->uapsd_max_sp_len << 2234 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 2235 } else { 2236 qos_info = 0; 2237 } 2238 2239 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 2240 } 2241 2242 /* add any remaining custom (i.e. vendor specific here) IEs */ 2243 if (assoc_data->ie_len) { 2244 noffset = assoc_data->ie_len; 2245 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 2246 } 2247 2248 if (assoc_data->fils_kek_len) { 2249 ret = fils_encrypt_assoc_req(skb, assoc_data); 2250 if (ret < 0) { 2251 dev_kfree_skb(skb); 2252 return ret; 2253 } 2254 } 2255 2256 pos = skb_tail_pointer(skb); 2257 kfree(ifmgd->assoc_req_ies); 2258 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 2259 if (!ifmgd->assoc_req_ies) { 2260 dev_kfree_skb(skb); 2261 return -ENOMEM; 2262 } 2263 2264 ifmgd->assoc_req_ies_len = pos - ie_start; 2265 2266 info.link_id = assoc_data->assoc_link_id; 2267 drv_mgd_prepare_tx(local, sdata, &info); 2268 2269 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2270 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2271 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 2272 IEEE80211_TX_INTFL_MLME_CONN_TX; 2273 ieee80211_tx_skb(sdata, skb); 2274 2275 return 0; 2276 } 2277 2278 void ieee80211_send_pspoll(struct ieee80211_local *local, 2279 struct ieee80211_sub_if_data *sdata) 2280 { 2281 struct ieee80211_pspoll *pspoll; 2282 struct sk_buff *skb; 2283 2284 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2285 if (!skb) 2286 return; 2287 2288 pspoll = (struct ieee80211_pspoll *) skb->data; 2289 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2290 2291 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2292 ieee80211_tx_skb(sdata, skb); 2293 } 2294 2295 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2296 struct ieee80211_sub_if_data *sdata, 2297 bool powersave) 2298 { 2299 struct sk_buff *skb; 2300 struct ieee80211_hdr_3addr *nullfunc; 2301 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2302 2303 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2304 !ieee80211_hw_check(&local->hw, 2305 DOESNT_SUPPORT_QOS_NDP)); 2306 if (!skb) 2307 return; 2308 2309 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2310 if (powersave) 2311 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2312 2313 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2314 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2315 2316 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2317 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2318 2319 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2320 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2321 2322 ieee80211_tx_skb(sdata, skb); 2323 } 2324 2325 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2326 struct ieee80211_sub_if_data *sdata) 2327 { 2328 struct sk_buff *skb; 2329 struct ieee80211_hdr *nullfunc; 2330 __le16 fc; 2331 2332 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2333 return; 2334 2335 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2336 if (!skb) 2337 return; 2338 2339 skb_reserve(skb, local->hw.extra_tx_headroom); 2340 2341 nullfunc = skb_put_zero(skb, 30); 2342 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2343 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2344 nullfunc->frame_control = fc; 2345 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2346 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2347 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2348 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2349 2350 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2351 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2352 ieee80211_tx_skb(sdata, skb); 2353 } 2354 2355 /* spectrum management related things */ 2356 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2357 struct wiphy_work *work) 2358 { 2359 struct ieee80211_link_data *link = 2360 container_of(work, struct ieee80211_link_data, 2361 u.mgd.csa.switch_work.work); 2362 struct ieee80211_sub_if_data *sdata = link->sdata; 2363 struct ieee80211_local *local = sdata->local; 2364 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2365 int ret; 2366 2367 if (!ieee80211_sdata_running(sdata)) 2368 return; 2369 2370 lockdep_assert_wiphy(local->hw.wiphy); 2371 2372 if (!ifmgd->associated) 2373 return; 2374 2375 if (!link->conf->csa_active) 2376 return; 2377 2378 /* 2379 * If the link isn't active (now), we cannot wait for beacons, won't 2380 * have a reserved chanctx, etc. Just switch over the chandef and 2381 * update cfg80211 directly. 2382 */ 2383 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2384 link->conf->chanreq = link->csa.chanreq; 2385 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2386 link->link_id); 2387 return; 2388 } 2389 2390 /* 2391 * using reservation isn't immediate as it may be deferred until later 2392 * with multi-vif. once reservation is complete it will re-schedule the 2393 * work with no reserved_chanctx so verify chandef to check if it 2394 * completed successfully 2395 */ 2396 2397 if (link->reserved_chanctx) { 2398 /* 2399 * with multi-vif csa driver may call ieee80211_csa_finish() 2400 * many times while waiting for other interfaces to use their 2401 * reservations 2402 */ 2403 if (link->reserved_ready) 2404 return; 2405 2406 ret = ieee80211_link_use_reserved_context(link); 2407 if (ret) { 2408 link_info(link, 2409 "failed to use reserved channel context, disconnecting (err=%d)\n", 2410 ret); 2411 wiphy_work_queue(sdata->local->hw.wiphy, 2412 &ifmgd->csa_connection_drop_work); 2413 } 2414 return; 2415 } 2416 2417 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2418 &link->csa.chanreq)) { 2419 link_info(link, 2420 "failed to finalize channel switch, disconnecting\n"); 2421 wiphy_work_queue(sdata->local->hw.wiphy, 2422 &ifmgd->csa_connection_drop_work); 2423 return; 2424 } 2425 2426 link->u.mgd.csa.waiting_bcn = true; 2427 2428 /* apply new TPE restrictions immediately on the new channel */ 2429 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2430 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2431 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2432 &link->u.mgd.csa.ap_chandef, 2433 &link->conf->chanreq.oper); 2434 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2435 sizeof(link->u.mgd.csa.tpe))) { 2436 link->conf->tpe = link->u.mgd.csa.tpe; 2437 ieee80211_link_info_change_notify(sdata, link, 2438 BSS_CHANGED_TPE); 2439 } 2440 } 2441 2442 ieee80211_sta_reset_beacon_monitor(sdata); 2443 ieee80211_sta_reset_conn_monitor(sdata); 2444 } 2445 2446 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2447 { 2448 struct ieee80211_sub_if_data *sdata = link->sdata; 2449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2450 int ret; 2451 2452 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2453 2454 WARN_ON(!link->conf->csa_active); 2455 2456 ieee80211_vif_unblock_queues_csa(sdata); 2457 2458 link->conf->csa_active = false; 2459 link->u.mgd.csa.blocked_tx = false; 2460 link->u.mgd.csa.waiting_bcn = false; 2461 2462 ret = drv_post_channel_switch(link); 2463 if (ret) { 2464 link_info(link, 2465 "driver post channel switch failed, disconnecting\n"); 2466 wiphy_work_queue(sdata->local->hw.wiphy, 2467 &ifmgd->csa_connection_drop_work); 2468 return; 2469 } 2470 2471 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2472 link->link_id); 2473 } 2474 2475 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2476 unsigned int link_id) 2477 { 2478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2479 2480 trace_api_chswitch_done(sdata, success, link_id); 2481 2482 rcu_read_lock(); 2483 2484 if (!success) { 2485 sdata_info(sdata, 2486 "driver channel switch failed (link %d), disconnecting\n", 2487 link_id); 2488 wiphy_work_queue(sdata->local->hw.wiphy, 2489 &sdata->u.mgd.csa_connection_drop_work); 2490 } else { 2491 struct ieee80211_link_data *link = 2492 rcu_dereference(sdata->link[link_id]); 2493 2494 if (WARN_ON(!link)) { 2495 rcu_read_unlock(); 2496 return; 2497 } 2498 2499 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2500 &link->u.mgd.csa.switch_work, 0); 2501 } 2502 2503 rcu_read_unlock(); 2504 } 2505 EXPORT_SYMBOL(ieee80211_chswitch_done); 2506 2507 static void 2508 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2509 { 2510 struct ieee80211_sub_if_data *sdata = link->sdata; 2511 struct ieee80211_local *local = sdata->local; 2512 2513 lockdep_assert_wiphy(local->hw.wiphy); 2514 2515 if (!local->ops->abort_channel_switch) 2516 return; 2517 2518 ieee80211_link_unreserve_chanctx(link); 2519 2520 ieee80211_vif_unblock_queues_csa(sdata); 2521 2522 link->conf->csa_active = false; 2523 link->u.mgd.csa.blocked_tx = false; 2524 2525 drv_abort_channel_switch(link); 2526 } 2527 2528 struct sta_csa_rnr_iter_data { 2529 struct ieee80211_link_data *link; 2530 struct ieee80211_channel *chan; 2531 u8 mld_id; 2532 }; 2533 2534 static enum cfg80211_rnr_iter_ret 2535 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2536 const struct ieee80211_neighbor_ap_info *info, 2537 const u8 *tbtt_info, u8 tbtt_info_len) 2538 { 2539 struct sta_csa_rnr_iter_data *data = _data; 2540 struct ieee80211_link_data *link = data->link; 2541 struct ieee80211_sub_if_data *sdata = link->sdata; 2542 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2543 const struct ieee80211_tbtt_info_ge_11 *ti; 2544 enum nl80211_band band; 2545 unsigned int center_freq; 2546 int link_id; 2547 2548 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2549 return RNR_ITER_CONTINUE; 2550 2551 if (tbtt_info_len < sizeof(*ti)) 2552 return RNR_ITER_CONTINUE; 2553 2554 ti = (const void *)tbtt_info; 2555 2556 if (ti->mld_params.mld_id != data->mld_id) 2557 return RNR_ITER_CONTINUE; 2558 2559 link_id = le16_get_bits(ti->mld_params.params, 2560 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2561 if (link_id != data->link->link_id) 2562 return RNR_ITER_CONTINUE; 2563 2564 /* we found the entry for our link! */ 2565 2566 /* this AP is confused, it had this right before ... just disconnect */ 2567 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2568 link_info(link, 2569 "AP now has invalid operating class in RNR, disconnect\n"); 2570 wiphy_work_queue(sdata->local->hw.wiphy, 2571 &ifmgd->csa_connection_drop_work); 2572 return RNR_ITER_BREAK; 2573 } 2574 2575 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2576 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2577 2578 return RNR_ITER_BREAK; 2579 } 2580 2581 static void 2582 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2583 struct ieee802_11_elems *elems) 2584 { 2585 struct ieee80211_sub_if_data *sdata = link->sdata; 2586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2587 struct sta_csa_rnr_iter_data data = { 2588 .link = link, 2589 }; 2590 2591 /* 2592 * If we get here, we see a beacon from another link without 2593 * CSA still being reported for it, so now we have to check 2594 * if the CSA was aborted or completed. This may not even be 2595 * perfectly possible if the CSA was only done for changing 2596 * the puncturing, but in that case if the link in inactive 2597 * we don't really care, and if it's an active link (or when 2598 * it's activated later) we'll get a beacon and adjust. 2599 */ 2600 2601 if (WARN_ON(!elems->ml_basic)) 2602 return; 2603 2604 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2605 2606 /* 2607 * So in order to do this, iterate the RNR element(s) and see 2608 * what channel is reported now. 2609 */ 2610 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2611 ieee80211_sta_csa_rnr_iter, &data); 2612 2613 if (!data.chan) { 2614 link_info(link, 2615 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2616 wiphy_work_queue(sdata->local->hw.wiphy, 2617 &ifmgd->csa_connection_drop_work); 2618 return; 2619 } 2620 2621 /* 2622 * If it doesn't match the CSA, then assume it aborted. This 2623 * may erroneously detect that it was _not_ aborted when it 2624 * was in fact aborted, but only changed the bandwidth or the 2625 * puncturing configuration, but we don't have enough data to 2626 * detect that. 2627 */ 2628 if (data.chan != link->csa.chanreq.oper.chan) 2629 ieee80211_sta_abort_chanswitch(link); 2630 } 2631 2632 enum ieee80211_csa_source { 2633 IEEE80211_CSA_SOURCE_BEACON, 2634 IEEE80211_CSA_SOURCE_OTHER_LINK, 2635 IEEE80211_CSA_SOURCE_PROT_ACTION, 2636 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2637 }; 2638 2639 static void 2640 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2641 u64 timestamp, u32 device_timestamp, 2642 struct ieee802_11_elems *full_elems, 2643 struct ieee802_11_elems *csa_elems, 2644 enum ieee80211_csa_source source) 2645 { 2646 struct ieee80211_sub_if_data *sdata = link->sdata; 2647 struct ieee80211_local *local = sdata->local; 2648 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2649 struct ieee80211_chanctx *chanctx = NULL; 2650 struct ieee80211_chanctx_conf *conf; 2651 struct ieee80211_csa_ie csa_ie = {}; 2652 struct ieee80211_channel_switch ch_switch = { 2653 .link_id = link->link_id, 2654 .timestamp = timestamp, 2655 .device_timestamp = device_timestamp, 2656 }; 2657 unsigned long now; 2658 int res; 2659 2660 lockdep_assert_wiphy(local->hw.wiphy); 2661 2662 if (csa_elems) { 2663 struct cfg80211_bss *cbss = link->conf->bss; 2664 enum nl80211_band current_band; 2665 struct ieee80211_bss *bss; 2666 2667 if (WARN_ON(!cbss)) 2668 return; 2669 2670 current_band = cbss->channel->band; 2671 bss = (void *)cbss->priv; 2672 2673 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2674 current_band, 2675 bss->vht_cap_info, 2676 &link->u.mgd.conn, 2677 link->u.mgd.bssid, 2678 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2679 &csa_ie); 2680 if (res == 0) { 2681 ch_switch.block_tx = csa_ie.mode; 2682 ch_switch.chandef = csa_ie.chanreq.oper; 2683 ch_switch.count = csa_ie.count; 2684 ch_switch.delay = csa_ie.max_switch_time; 2685 } 2686 2687 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2688 } else { 2689 /* 2690 * If there was no per-STA profile for this link, we 2691 * get called with csa_elems == NULL. This of course means 2692 * there are no CSA elements, so set res=1 indicating 2693 * no more CSA. 2694 */ 2695 res = 1; 2696 } 2697 2698 if (res < 0) { 2699 /* ignore this case, not a protected frame */ 2700 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2701 return; 2702 goto drop_connection; 2703 } 2704 2705 if (link->conf->csa_active) { 2706 switch (source) { 2707 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2708 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2709 /* already processing - disregard action frames */ 2710 return; 2711 case IEEE80211_CSA_SOURCE_BEACON: 2712 if (link->u.mgd.csa.waiting_bcn) { 2713 ieee80211_chswitch_post_beacon(link); 2714 /* 2715 * If the CSA is still present after the switch 2716 * we need to consider it as a new CSA (possibly 2717 * to self). This happens by not returning here 2718 * so we'll get to the check below. 2719 */ 2720 } else if (res) { 2721 ieee80211_sta_abort_chanswitch(link); 2722 return; 2723 } else { 2724 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2725 return; 2726 } 2727 break; 2728 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2729 /* active link: we want to see the beacon to continue */ 2730 if (ieee80211_vif_link_active(&sdata->vif, 2731 link->link_id)) 2732 return; 2733 2734 /* switch work ran, so just complete the process */ 2735 if (link->u.mgd.csa.waiting_bcn) { 2736 ieee80211_chswitch_post_beacon(link); 2737 /* 2738 * If the CSA is still present after the switch 2739 * we need to consider it as a new CSA (possibly 2740 * to self). This happens by not returning here 2741 * so we'll get to the check below. 2742 */ 2743 break; 2744 } 2745 2746 /* link still has CSA but we already know, do nothing */ 2747 if (!res) 2748 return; 2749 2750 /* check in the RNR if the CSA aborted */ 2751 ieee80211_sta_other_link_csa_disappeared(link, 2752 full_elems); 2753 return; 2754 } 2755 } 2756 2757 /* no active CSA nor a new one */ 2758 if (res) { 2759 /* 2760 * However, we may have stopped queues when receiving a public 2761 * action frame that couldn't be protected, if it had the quiet 2762 * bit set. This is a trade-off, we want to be quiet as soon as 2763 * possible, but also don't trust the public action frame much, 2764 * as it can't be protected. 2765 */ 2766 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2767 link->u.mgd.csa.blocked_tx = false; 2768 ieee80211_vif_unblock_queues_csa(sdata); 2769 } 2770 return; 2771 } 2772 2773 /* 2774 * We don't really trust public action frames, but block queues (go to 2775 * quiet mode) for them anyway, we should get a beacon soon to either 2776 * know what the CSA really is, or figure out the public action frame 2777 * was actually an attack. 2778 */ 2779 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2780 if (csa_ie.mode) { 2781 link->u.mgd.csa.blocked_tx = true; 2782 ieee80211_vif_block_queues_csa(sdata); 2783 } 2784 return; 2785 } 2786 2787 if (link->conf->chanreq.oper.chan->band != 2788 csa_ie.chanreq.oper.chan->band) { 2789 link_info(link, 2790 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2791 link->u.mgd.bssid, 2792 csa_ie.chanreq.oper.chan->center_freq, 2793 csa_ie.chanreq.oper.width, 2794 csa_ie.chanreq.oper.center_freq1, 2795 csa_ie.chanreq.oper.center_freq2); 2796 goto drop_connection; 2797 } 2798 2799 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2800 IEEE80211_CHAN_DISABLED)) { 2801 link_info(link, 2802 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2803 link->u.mgd.bssid, 2804 csa_ie.chanreq.oper.chan->center_freq, 2805 csa_ie.chanreq.oper.chan->freq_offset, 2806 csa_ie.chanreq.oper.width, 2807 csa_ie.chanreq.oper.center_freq1, 2808 csa_ie.chanreq.oper.freq1_offset, 2809 csa_ie.chanreq.oper.center_freq2); 2810 goto drop_connection; 2811 } 2812 2813 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2814 &link->conf->chanreq.oper) && 2815 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2816 if (link->u.mgd.csa.ignored_same_chan) 2817 return; 2818 link_info(link, 2819 "AP %pM tries to chanswitch to same channel, ignore\n", 2820 link->u.mgd.bssid); 2821 link->u.mgd.csa.ignored_same_chan = true; 2822 return; 2823 } 2824 2825 /* 2826 * Drop all TDLS peers on the affected link - either we disconnect or 2827 * move to a different channel from this point on. There's no telling 2828 * what our peer will do. 2829 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2830 * have an incompatible wider chandef. 2831 */ 2832 ieee80211_teardown_tdls_peers(link); 2833 2834 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2835 lockdep_is_held(&local->hw.wiphy->mtx)); 2836 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2837 link_info(link, 2838 "no channel context assigned to vif?, disconnecting\n"); 2839 goto drop_connection; 2840 } 2841 2842 if (conf) 2843 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2844 2845 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2846 link_info(link, 2847 "driver doesn't support chan-switch with channel contexts\n"); 2848 goto drop_connection; 2849 } 2850 2851 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2852 link_info(link, 2853 "preparing for channel switch failed, disconnecting\n"); 2854 goto drop_connection; 2855 } 2856 2857 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2858 2859 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2860 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2861 &csa_ie.chanreq.ap); 2862 2863 if (chanctx) { 2864 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2865 chanctx->mode, false); 2866 if (res) { 2867 link_info(link, 2868 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2869 res); 2870 goto drop_connection; 2871 } 2872 } 2873 2874 link->conf->csa_active = true; 2875 link->u.mgd.csa.ignored_same_chan = false; 2876 link->u.mgd.beacon_crc_valid = false; 2877 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2878 2879 if (csa_ie.mode) 2880 ieee80211_vif_block_queues_csa(sdata); 2881 2882 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2883 link->link_id, csa_ie.count, 2884 csa_ie.mode); 2885 2886 /* we may have to handle timeout for deactivated link in software */ 2887 now = jiffies; 2888 link->u.mgd.csa.time = now + 2889 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2890 link->conf->beacon_int); 2891 2892 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2893 local->ops->channel_switch) { 2894 /* 2895 * Use driver's channel switch callback, the driver will 2896 * later call ieee80211_chswitch_done(). It may deactivate 2897 * the link as well, we handle that elsewhere and queue 2898 * the csa.switch_work for the calculated time then. 2899 */ 2900 drv_channel_switch(local, sdata, &ch_switch); 2901 return; 2902 } 2903 2904 /* channel switch handled in software */ 2905 wiphy_delayed_work_queue(local->hw.wiphy, 2906 &link->u.mgd.csa.switch_work, 2907 link->u.mgd.csa.time - now); 2908 return; 2909 drop_connection: 2910 /* 2911 * This is just so that the disconnect flow will know that 2912 * we were trying to switch channel and failed. In case the 2913 * mode is 1 (we are not allowed to Tx), we will know not to 2914 * send a deauthentication frame. Those two fields will be 2915 * reset when the disconnection worker runs. 2916 */ 2917 link->conf->csa_active = true; 2918 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2919 2920 wiphy_work_queue(sdata->local->hw.wiphy, 2921 &ifmgd->csa_connection_drop_work); 2922 } 2923 2924 struct sta_bss_param_ch_cnt_data { 2925 struct ieee80211_sub_if_data *sdata; 2926 u8 reporting_link_id; 2927 u8 mld_id; 2928 }; 2929 2930 static enum cfg80211_rnr_iter_ret 2931 ieee80211_sta_bss_param_ch_cnt_iter(void *_data, u8 type, 2932 const struct ieee80211_neighbor_ap_info *info, 2933 const u8 *tbtt_info, u8 tbtt_info_len) 2934 { 2935 struct sta_bss_param_ch_cnt_data *data = _data; 2936 struct ieee80211_sub_if_data *sdata = data->sdata; 2937 const struct ieee80211_tbtt_info_ge_11 *ti; 2938 u8 bss_param_ch_cnt; 2939 int link_id; 2940 2941 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2942 return RNR_ITER_CONTINUE; 2943 2944 if (tbtt_info_len < sizeof(*ti)) 2945 return RNR_ITER_CONTINUE; 2946 2947 ti = (const void *)tbtt_info; 2948 2949 if (ti->mld_params.mld_id != data->mld_id) 2950 return RNR_ITER_CONTINUE; 2951 2952 link_id = le16_get_bits(ti->mld_params.params, 2953 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2954 bss_param_ch_cnt = 2955 le16_get_bits(ti->mld_params.params, 2956 IEEE80211_RNR_MLD_PARAMS_BSS_CHANGE_COUNT); 2957 2958 if (bss_param_ch_cnt != 255 && 2959 link_id < ARRAY_SIZE(sdata->link)) { 2960 struct ieee80211_link_data *link = 2961 sdata_dereference(sdata->link[link_id], sdata); 2962 2963 if (link && link->conf->bss_param_ch_cnt != bss_param_ch_cnt) { 2964 link->conf->bss_param_ch_cnt = bss_param_ch_cnt; 2965 link->conf->bss_param_ch_cnt_link_id = 2966 data->reporting_link_id; 2967 } 2968 } 2969 2970 return RNR_ITER_CONTINUE; 2971 } 2972 2973 static void 2974 ieee80211_mgd_update_bss_param_ch_cnt(struct ieee80211_sub_if_data *sdata, 2975 struct ieee80211_bss_conf *bss_conf, 2976 struct ieee802_11_elems *elems) 2977 { 2978 struct sta_bss_param_ch_cnt_data data = { 2979 .reporting_link_id = bss_conf->link_id, 2980 .sdata = sdata, 2981 }; 2982 int bss_param_ch_cnt; 2983 2984 if (!elems->ml_basic) 2985 return; 2986 2987 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2988 2989 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2990 ieee80211_sta_bss_param_ch_cnt_iter, &data); 2991 2992 bss_param_ch_cnt = 2993 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 2994 2995 /* 2996 * Update bss_param_ch_cnt_link_id even if bss_param_ch_cnt 2997 * didn't change to indicate that we got a beacon on our own 2998 * link. 2999 */ 3000 if (bss_param_ch_cnt >= 0 && bss_param_ch_cnt != 255) { 3001 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 3002 bss_conf->bss_param_ch_cnt_link_id = 3003 bss_conf->link_id; 3004 } 3005 } 3006 3007 static bool 3008 ieee80211_find_80211h_pwr_constr(struct ieee80211_channel *channel, 3009 const u8 *country_ie, u8 country_ie_len, 3010 const u8 *pwr_constr_elem, 3011 int *chan_pwr, int *pwr_reduction) 3012 { 3013 struct ieee80211_country_ie_triplet *triplet; 3014 int chan = ieee80211_frequency_to_channel(channel->center_freq); 3015 int i, chan_increment; 3016 bool have_chan_pwr = false; 3017 3018 /* Invalid IE */ 3019 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 3020 return false; 3021 3022 triplet = (void *)(country_ie + 3); 3023 country_ie_len -= 3; 3024 3025 switch (channel->band) { 3026 default: 3027 WARN_ON_ONCE(1); 3028 fallthrough; 3029 case NL80211_BAND_2GHZ: 3030 case NL80211_BAND_60GHZ: 3031 case NL80211_BAND_LC: 3032 chan_increment = 1; 3033 break; 3034 case NL80211_BAND_5GHZ: 3035 chan_increment = 4; 3036 break; 3037 case NL80211_BAND_6GHZ: 3038 /* 3039 * In the 6 GHz band, the "maximum transmit power level" 3040 * field in the triplets is reserved, and thus will be 3041 * zero and we shouldn't use it to control TX power. 3042 * The actual TX power will be given in the transmit 3043 * power envelope element instead. 3044 */ 3045 return false; 3046 } 3047 3048 /* find channel */ 3049 while (country_ie_len >= 3) { 3050 u8 first_channel = triplet->chans.first_channel; 3051 3052 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 3053 goto next; 3054 3055 for (i = 0; i < triplet->chans.num_channels; i++) { 3056 if (first_channel + i * chan_increment == chan) { 3057 have_chan_pwr = true; 3058 *chan_pwr = triplet->chans.max_power; 3059 break; 3060 } 3061 } 3062 if (have_chan_pwr) 3063 break; 3064 3065 next: 3066 triplet++; 3067 country_ie_len -= 3; 3068 } 3069 3070 if (have_chan_pwr && pwr_constr_elem) 3071 *pwr_reduction = *pwr_constr_elem; 3072 else 3073 *pwr_reduction = 0; 3074 3075 return have_chan_pwr; 3076 } 3077 3078 static void ieee80211_find_cisco_dtpc(struct ieee80211_channel *channel, 3079 const u8 *cisco_dtpc_ie, 3080 int *pwr_level) 3081 { 3082 /* From practical testing, the first data byte of the DTPC element 3083 * seems to contain the requested dBm level, and the CLI on Cisco 3084 * APs clearly state the range is -127 to 127 dBm, which indicates 3085 * a signed byte, although it seemingly never actually goes negative. 3086 * The other byte seems to always be zero. 3087 */ 3088 *pwr_level = (__s8)cisco_dtpc_ie[4]; 3089 } 3090 3091 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 3092 struct ieee80211_channel *channel, 3093 struct ieee80211_mgmt *mgmt, 3094 const u8 *country_ie, u8 country_ie_len, 3095 const u8 *pwr_constr_ie, 3096 const u8 *cisco_dtpc_ie) 3097 { 3098 struct ieee80211_sub_if_data *sdata = link->sdata; 3099 bool has_80211h_pwr = false, has_cisco_pwr = false; 3100 int chan_pwr = 0, pwr_reduction_80211h = 0; 3101 int pwr_level_cisco, pwr_level_80211h; 3102 int new_ap_level; 3103 __le16 capab = mgmt->u.probe_resp.capab_info; 3104 3105 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 3106 return 0; /* TODO */ 3107 3108 if (country_ie && 3109 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 3110 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 3111 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 3112 channel, country_ie, country_ie_len, 3113 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 3114 pwr_level_80211h = 3115 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 3116 } 3117 3118 if (cisco_dtpc_ie) { 3119 ieee80211_find_cisco_dtpc( 3120 channel, cisco_dtpc_ie, &pwr_level_cisco); 3121 has_cisco_pwr = true; 3122 } 3123 3124 if (!has_80211h_pwr && !has_cisco_pwr) 3125 return 0; 3126 3127 /* If we have both 802.11h and Cisco DTPC, apply both limits 3128 * by picking the smallest of the two power levels advertised. 3129 */ 3130 if (has_80211h_pwr && 3131 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 3132 new_ap_level = pwr_level_80211h; 3133 3134 if (link->ap_power_level == new_ap_level) 3135 return 0; 3136 3137 sdata_dbg(sdata, 3138 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 3139 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 3140 link->u.mgd.bssid); 3141 } else { /* has_cisco_pwr is always true here. */ 3142 new_ap_level = pwr_level_cisco; 3143 3144 if (link->ap_power_level == new_ap_level) 3145 return 0; 3146 3147 sdata_dbg(sdata, 3148 "Limiting TX power to %d dBm as advertised by %pM\n", 3149 pwr_level_cisco, link->u.mgd.bssid); 3150 } 3151 3152 link->ap_power_level = new_ap_level; 3153 if (__ieee80211_recalc_txpower(link)) 3154 return BSS_CHANGED_TXPOWER; 3155 return 0; 3156 } 3157 3158 /* powersave */ 3159 static void ieee80211_enable_ps(struct ieee80211_local *local, 3160 struct ieee80211_sub_if_data *sdata) 3161 { 3162 struct ieee80211_conf *conf = &local->hw.conf; 3163 3164 /* 3165 * If we are scanning right now then the parameters will 3166 * take effect when scan finishes. 3167 */ 3168 if (local->scanning) 3169 return; 3170 3171 if (conf->dynamic_ps_timeout > 0 && 3172 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3173 mod_timer(&local->dynamic_ps_timer, jiffies + 3174 msecs_to_jiffies(conf->dynamic_ps_timeout)); 3175 } else { 3176 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 3177 ieee80211_send_nullfunc(local, sdata, true); 3178 3179 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3180 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3181 return; 3182 3183 conf->flags |= IEEE80211_CONF_PS; 3184 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3185 } 3186 } 3187 3188 static void ieee80211_change_ps(struct ieee80211_local *local) 3189 { 3190 struct ieee80211_conf *conf = &local->hw.conf; 3191 3192 if (local->ps_sdata) { 3193 ieee80211_enable_ps(local, local->ps_sdata); 3194 } else if (conf->flags & IEEE80211_CONF_PS) { 3195 conf->flags &= ~IEEE80211_CONF_PS; 3196 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3197 timer_delete_sync(&local->dynamic_ps_timer); 3198 wiphy_work_cancel(local->hw.wiphy, 3199 &local->dynamic_ps_enable_work); 3200 } 3201 } 3202 3203 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 3204 { 3205 struct ieee80211_local *local = sdata->local; 3206 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 3207 struct sta_info *sta = NULL; 3208 bool authorized = false; 3209 3210 if (!mgd->powersave) 3211 return false; 3212 3213 if (mgd->broken_ap) 3214 return false; 3215 3216 if (!mgd->associated) 3217 return false; 3218 3219 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 3220 return false; 3221 3222 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 3223 !sdata->deflink.u.mgd.have_beacon) 3224 return false; 3225 3226 rcu_read_lock(); 3227 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3228 if (sta) 3229 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 3230 rcu_read_unlock(); 3231 3232 return authorized; 3233 } 3234 3235 /* need to hold RTNL or interface lock */ 3236 void ieee80211_recalc_ps(struct ieee80211_local *local) 3237 { 3238 struct ieee80211_sub_if_data *sdata, *found = NULL; 3239 int count = 0; 3240 int timeout; 3241 3242 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 3243 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 3244 local->ps_sdata = NULL; 3245 return; 3246 } 3247 3248 list_for_each_entry(sdata, &local->interfaces, list) { 3249 if (!ieee80211_sdata_running(sdata)) 3250 continue; 3251 if (sdata->vif.type == NL80211_IFTYPE_AP) { 3252 /* If an AP vif is found, then disable PS 3253 * by setting the count to zero thereby setting 3254 * ps_sdata to NULL. 3255 */ 3256 count = 0; 3257 break; 3258 } 3259 if (sdata->vif.type != NL80211_IFTYPE_STATION) 3260 continue; 3261 found = sdata; 3262 count++; 3263 } 3264 3265 if (count == 1 && ieee80211_powersave_allowed(found)) { 3266 u8 dtimper = found->deflink.u.mgd.dtim_period; 3267 3268 timeout = local->dynamic_ps_forced_timeout; 3269 if (timeout < 0) 3270 timeout = 100; 3271 local->hw.conf.dynamic_ps_timeout = timeout; 3272 3273 /* If the TIM IE is invalid, pretend the value is 1 */ 3274 if (!dtimper) 3275 dtimper = 1; 3276 3277 local->hw.conf.ps_dtim_period = dtimper; 3278 local->ps_sdata = found; 3279 } else { 3280 local->ps_sdata = NULL; 3281 } 3282 3283 ieee80211_change_ps(local); 3284 } 3285 3286 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 3287 { 3288 bool ps_allowed = ieee80211_powersave_allowed(sdata); 3289 3290 if (sdata->vif.cfg.ps != ps_allowed) { 3291 sdata->vif.cfg.ps = ps_allowed; 3292 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 3293 } 3294 } 3295 3296 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 3297 struct wiphy_work *work) 3298 { 3299 struct ieee80211_local *local = 3300 container_of(work, struct ieee80211_local, 3301 dynamic_ps_disable_work); 3302 3303 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3304 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3305 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3306 } 3307 3308 ieee80211_wake_queues_by_reason(&local->hw, 3309 IEEE80211_MAX_QUEUE_MAP, 3310 IEEE80211_QUEUE_STOP_REASON_PS, 3311 false); 3312 } 3313 3314 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 3315 struct wiphy_work *work) 3316 { 3317 struct ieee80211_local *local = 3318 container_of(work, struct ieee80211_local, 3319 dynamic_ps_enable_work); 3320 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 3321 struct ieee80211_if_managed *ifmgd; 3322 unsigned long flags; 3323 int q; 3324 3325 /* can only happen when PS was just disabled anyway */ 3326 if (!sdata) 3327 return; 3328 3329 ifmgd = &sdata->u.mgd; 3330 3331 if (local->hw.conf.flags & IEEE80211_CONF_PS) 3332 return; 3333 3334 if (local->hw.conf.dynamic_ps_timeout > 0) { 3335 /* don't enter PS if TX frames are pending */ 3336 if (drv_tx_frames_pending(local)) { 3337 mod_timer(&local->dynamic_ps_timer, jiffies + 3338 msecs_to_jiffies( 3339 local->hw.conf.dynamic_ps_timeout)); 3340 return; 3341 } 3342 3343 /* 3344 * transmission can be stopped by others which leads to 3345 * dynamic_ps_timer expiry. Postpone the ps timer if it 3346 * is not the actual idle state. 3347 */ 3348 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 3349 for (q = 0; q < local->hw.queues; q++) { 3350 if (local->queue_stop_reasons[q]) { 3351 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 3352 flags); 3353 mod_timer(&local->dynamic_ps_timer, jiffies + 3354 msecs_to_jiffies( 3355 local->hw.conf.dynamic_ps_timeout)); 3356 return; 3357 } 3358 } 3359 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3360 } 3361 3362 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3363 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3364 if (drv_tx_frames_pending(local)) { 3365 mod_timer(&local->dynamic_ps_timer, jiffies + 3366 msecs_to_jiffies( 3367 local->hw.conf.dynamic_ps_timeout)); 3368 } else { 3369 ieee80211_send_nullfunc(local, sdata, true); 3370 /* Flush to get the tx status of nullfunc frame */ 3371 ieee80211_flush_queues(local, sdata, false); 3372 } 3373 } 3374 3375 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3376 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3377 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3378 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3379 local->hw.conf.flags |= IEEE80211_CONF_PS; 3380 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3381 } 3382 } 3383 3384 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3385 { 3386 struct ieee80211_local *local = timer_container_of(local, t, 3387 dynamic_ps_timer); 3388 3389 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3390 } 3391 3392 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3393 { 3394 struct ieee80211_link_data *link = 3395 container_of(work, struct ieee80211_link_data, 3396 dfs_cac_timer_work.work); 3397 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3398 struct ieee80211_sub_if_data *sdata = link->sdata; 3399 3400 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3401 3402 if (sdata->wdev.links[link->link_id].cac_started) { 3403 ieee80211_link_release_channel(link); 3404 cfg80211_cac_event(sdata->dev, &chandef, 3405 NL80211_RADAR_CAC_FINISHED, 3406 GFP_KERNEL, link->link_id); 3407 } 3408 } 3409 3410 static bool 3411 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3412 { 3413 struct ieee80211_local *local = sdata->local; 3414 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3415 bool ret = false; 3416 int ac; 3417 3418 if (local->hw.queues < IEEE80211_NUM_ACS) 3419 return false; 3420 3421 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3422 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3423 int non_acm_ac; 3424 unsigned long now = jiffies; 3425 3426 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3427 tx_tspec->admitted_time && 3428 time_after(now, tx_tspec->time_slice_start + HZ)) { 3429 tx_tspec->consumed_tx_time = 0; 3430 tx_tspec->time_slice_start = now; 3431 3432 if (tx_tspec->downgraded) 3433 tx_tspec->action = 3434 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3435 } 3436 3437 switch (tx_tspec->action) { 3438 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3439 /* take the original parameters */ 3440 if (drv_conf_tx(local, &sdata->deflink, ac, 3441 &sdata->deflink.tx_conf[ac])) 3442 link_err(&sdata->deflink, 3443 "failed to set TX queue parameters for queue %d\n", 3444 ac); 3445 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3446 tx_tspec->downgraded = false; 3447 ret = true; 3448 break; 3449 case TX_TSPEC_ACTION_DOWNGRADE: 3450 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3451 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3452 ret = true; 3453 break; 3454 } 3455 /* downgrade next lower non-ACM AC */ 3456 for (non_acm_ac = ac + 1; 3457 non_acm_ac < IEEE80211_NUM_ACS; 3458 non_acm_ac++) 3459 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3460 break; 3461 /* Usually the loop will result in using BK even if it 3462 * requires admission control, but such a configuration 3463 * makes no sense and we have to transmit somehow - the 3464 * AC selection does the same thing. 3465 * If we started out trying to downgrade from BK, then 3466 * the extra condition here might be needed. 3467 */ 3468 if (non_acm_ac >= IEEE80211_NUM_ACS) 3469 non_acm_ac = IEEE80211_AC_BK; 3470 if (drv_conf_tx(local, &sdata->deflink, ac, 3471 &sdata->deflink.tx_conf[non_acm_ac])) 3472 link_err(&sdata->deflink, 3473 "failed to set TX queue parameters for queue %d\n", 3474 ac); 3475 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3476 ret = true; 3477 wiphy_delayed_work_queue(local->hw.wiphy, 3478 &ifmgd->tx_tspec_wk, 3479 tx_tspec->time_slice_start + 3480 HZ - now + 1); 3481 break; 3482 case TX_TSPEC_ACTION_NONE: 3483 /* nothing now */ 3484 break; 3485 } 3486 } 3487 3488 return ret; 3489 } 3490 3491 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3492 { 3493 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3494 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3495 BSS_CHANGED_QOS); 3496 } 3497 3498 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3499 struct wiphy_work *work) 3500 { 3501 struct ieee80211_sub_if_data *sdata; 3502 3503 sdata = container_of(work, struct ieee80211_sub_if_data, 3504 u.mgd.tx_tspec_wk.work); 3505 ieee80211_sta_handle_tspec_ac_params(sdata); 3506 } 3507 3508 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3509 { 3510 struct ieee80211_sub_if_data *sdata = link->sdata; 3511 struct ieee80211_local *local = sdata->local; 3512 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3513 struct ieee80211_tx_queue_params *params = link->tx_conf; 3514 u8 ac; 3515 3516 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3517 mlme_dbg(sdata, 3518 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3519 ac, params[ac].acm, 3520 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3521 params[ac].txop, params[ac].uapsd, 3522 ifmgd->tx_tspec[ac].downgraded); 3523 if (!ifmgd->tx_tspec[ac].downgraded && 3524 drv_conf_tx(local, link, ac, ¶ms[ac])) 3525 link_err(link, 3526 "failed to set TX queue parameters for AC %d\n", 3527 ac); 3528 } 3529 } 3530 3531 /* MLME */ 3532 static bool 3533 _ieee80211_sta_wmm_params(struct ieee80211_local *local, 3534 struct ieee80211_link_data *link, 3535 const u8 *wmm_param, size_t wmm_param_len, 3536 const struct ieee80211_mu_edca_param_set *mu_edca) 3537 { 3538 struct ieee80211_sub_if_data *sdata = link->sdata; 3539 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3541 size_t left; 3542 int count, mu_edca_count, ac; 3543 const u8 *pos; 3544 u8 uapsd_queues = 0; 3545 3546 if (!local->ops->conf_tx) 3547 return false; 3548 3549 if (local->hw.queues < IEEE80211_NUM_ACS) 3550 return false; 3551 3552 if (!wmm_param) 3553 return false; 3554 3555 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3556 return false; 3557 3558 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3559 uapsd_queues = ifmgd->uapsd_queues; 3560 3561 count = wmm_param[6] & 0x0f; 3562 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3563 * if mu_edca was preset before and now it disappeared tell 3564 * the driver about it. 3565 */ 3566 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3567 if (count == link->u.mgd.wmm_last_param_set && 3568 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3569 return false; 3570 link->u.mgd.wmm_last_param_set = count; 3571 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3572 3573 pos = wmm_param + 8; 3574 left = wmm_param_len - 8; 3575 3576 memset(¶ms, 0, sizeof(params)); 3577 3578 sdata->wmm_acm = 0; 3579 for (; left >= 4; left -= 4, pos += 4) { 3580 int aci = (pos[0] >> 5) & 0x03; 3581 int acm = (pos[0] >> 4) & 0x01; 3582 bool uapsd = false; 3583 3584 switch (aci) { 3585 case 1: /* AC_BK */ 3586 ac = IEEE80211_AC_BK; 3587 if (acm) 3588 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3589 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3590 uapsd = true; 3591 params[ac].mu_edca = !!mu_edca; 3592 if (mu_edca) 3593 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3594 break; 3595 case 2: /* AC_VI */ 3596 ac = IEEE80211_AC_VI; 3597 if (acm) 3598 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3599 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3600 uapsd = true; 3601 params[ac].mu_edca = !!mu_edca; 3602 if (mu_edca) 3603 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3604 break; 3605 case 3: /* AC_VO */ 3606 ac = IEEE80211_AC_VO; 3607 if (acm) 3608 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3609 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3610 uapsd = true; 3611 params[ac].mu_edca = !!mu_edca; 3612 if (mu_edca) 3613 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3614 break; 3615 case 0: /* AC_BE */ 3616 default: 3617 ac = IEEE80211_AC_BE; 3618 if (acm) 3619 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3620 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3621 uapsd = true; 3622 params[ac].mu_edca = !!mu_edca; 3623 if (mu_edca) 3624 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3625 break; 3626 } 3627 3628 params[ac].aifs = pos[0] & 0x0f; 3629 3630 if (params[ac].aifs < 2) { 3631 link_info(link, 3632 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3633 params[ac].aifs, aci); 3634 params[ac].aifs = 2; 3635 } 3636 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3637 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3638 params[ac].txop = get_unaligned_le16(pos + 2); 3639 params[ac].acm = acm; 3640 params[ac].uapsd = uapsd; 3641 3642 if (params[ac].cw_min == 0 || 3643 params[ac].cw_min > params[ac].cw_max) { 3644 link_info(link, 3645 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3646 params[ac].cw_min, params[ac].cw_max, aci); 3647 return false; 3648 } 3649 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3650 } 3651 3652 /* WMM specification requires all 4 ACIs. */ 3653 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3654 if (params[ac].cw_min == 0) { 3655 link_info(link, 3656 "AP has invalid WMM params (missing AC %d), using defaults\n", 3657 ac); 3658 return false; 3659 } 3660 } 3661 3662 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3663 link->tx_conf[ac] = params[ac]; 3664 3665 return true; 3666 } 3667 3668 static bool 3669 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3670 struct ieee80211_link_data *link, 3671 const u8 *wmm_param, size_t wmm_param_len, 3672 const struct ieee80211_mu_edca_param_set *mu_edca) 3673 { 3674 if (!_ieee80211_sta_wmm_params(local, link, wmm_param, wmm_param_len, 3675 mu_edca)) 3676 return false; 3677 3678 ieee80211_mgd_set_link_qos_params(link); 3679 3680 /* enable WMM or activate new settings */ 3681 link->conf->qos = true; 3682 return true; 3683 } 3684 3685 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3686 { 3687 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3688 3689 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3690 ieee80211_run_deferred_scan(sdata->local); 3691 } 3692 3693 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3694 { 3695 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3696 3697 __ieee80211_stop_poll(sdata); 3698 } 3699 3700 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3701 u16 capab, bool erp_valid, u8 erp) 3702 { 3703 struct ieee80211_bss_conf *bss_conf = link->conf; 3704 struct ieee80211_supported_band *sband; 3705 u64 changed = 0; 3706 bool use_protection; 3707 bool use_short_preamble; 3708 bool use_short_slot; 3709 3710 sband = ieee80211_get_link_sband(link); 3711 if (!sband) 3712 return changed; 3713 3714 if (erp_valid) { 3715 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3716 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3717 } else { 3718 use_protection = false; 3719 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3720 } 3721 3722 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3723 if (sband->band == NL80211_BAND_5GHZ || 3724 sband->band == NL80211_BAND_6GHZ) 3725 use_short_slot = true; 3726 3727 if (use_protection != bss_conf->use_cts_prot) { 3728 bss_conf->use_cts_prot = use_protection; 3729 changed |= BSS_CHANGED_ERP_CTS_PROT; 3730 } 3731 3732 if (use_short_preamble != bss_conf->use_short_preamble) { 3733 bss_conf->use_short_preamble = use_short_preamble; 3734 changed |= BSS_CHANGED_ERP_PREAMBLE; 3735 } 3736 3737 if (use_short_slot != bss_conf->use_short_slot) { 3738 bss_conf->use_short_slot = use_short_slot; 3739 changed |= BSS_CHANGED_ERP_SLOT; 3740 } 3741 3742 return changed; 3743 } 3744 3745 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3746 struct cfg80211_bss *cbss) 3747 { 3748 struct ieee80211_sub_if_data *sdata = link->sdata; 3749 struct ieee80211_bss_conf *bss_conf = link->conf; 3750 struct ieee80211_bss *bss = (void *)cbss->priv; 3751 u64 changed = BSS_CHANGED_QOS; 3752 3753 /* not really used in MLO */ 3754 sdata->u.mgd.beacon_timeout = 3755 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3756 bss_conf->beacon_int)); 3757 3758 changed |= ieee80211_handle_bss_capability(link, 3759 bss_conf->assoc_capability, 3760 bss->has_erp_value, 3761 bss->erp_value); 3762 3763 ieee80211_check_rate_mask(link); 3764 3765 link->conf->bss = cbss; 3766 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3767 3768 if (sdata->vif.p2p || 3769 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3770 const struct cfg80211_bss_ies *ies; 3771 3772 rcu_read_lock(); 3773 ies = rcu_dereference(cbss->ies); 3774 if (ies) { 3775 int ret; 3776 3777 ret = cfg80211_get_p2p_attr( 3778 ies->data, ies->len, 3779 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3780 (u8 *) &bss_conf->p2p_noa_attr, 3781 sizeof(bss_conf->p2p_noa_attr)); 3782 if (ret >= 2) { 3783 link->u.mgd.p2p_noa_index = 3784 bss_conf->p2p_noa_attr.index; 3785 changed |= BSS_CHANGED_P2P_PS; 3786 } 3787 } 3788 rcu_read_unlock(); 3789 } 3790 3791 if (link->u.mgd.have_beacon) { 3792 bss_conf->beacon_rate = bss->beacon_rate; 3793 changed |= BSS_CHANGED_BEACON_INFO; 3794 } else { 3795 bss_conf->beacon_rate = NULL; 3796 } 3797 3798 /* Tell the driver to monitor connection quality (if supported) */ 3799 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3800 bss_conf->cqm_rssi_thold) 3801 changed |= BSS_CHANGED_CQM; 3802 3803 return changed; 3804 } 3805 3806 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3807 struct ieee80211_mgd_assoc_data *assoc_data, 3808 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3809 { 3810 struct ieee80211_local *local = sdata->local; 3811 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3812 u64 vif_changed = BSS_CHANGED_ASSOC; 3813 unsigned int link_id; 3814 3815 lockdep_assert_wiphy(local->hw.wiphy); 3816 3817 sdata->u.mgd.associated = true; 3818 3819 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3820 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3821 struct ieee80211_link_data *link; 3822 3823 if (!cbss || 3824 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3825 continue; 3826 3827 if (ieee80211_vif_is_mld(&sdata->vif) && 3828 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3829 continue; 3830 3831 link = sdata_dereference(sdata->link[link_id], sdata); 3832 if (WARN_ON(!link)) 3833 return; 3834 3835 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3836 } 3837 3838 /* just to be sure */ 3839 ieee80211_stop_poll(sdata); 3840 3841 ieee80211_led_assoc(local, 1); 3842 3843 vif_cfg->assoc = 1; 3844 3845 /* Enable ARP filtering */ 3846 if (vif_cfg->arp_addr_cnt) 3847 vif_changed |= BSS_CHANGED_ARP_FILTER; 3848 3849 if (ieee80211_vif_is_mld(&sdata->vif)) { 3850 for (link_id = 0; 3851 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3852 link_id++) { 3853 struct ieee80211_link_data *link; 3854 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3855 3856 if (!cbss || 3857 !(BIT(link_id) & 3858 ieee80211_vif_usable_links(&sdata->vif)) || 3859 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3860 continue; 3861 3862 link = sdata_dereference(sdata->link[link_id], sdata); 3863 if (WARN_ON(!link)) 3864 return; 3865 3866 ieee80211_link_info_change_notify(sdata, link, 3867 changed[link_id]); 3868 3869 ieee80211_recalc_smps(sdata, link); 3870 } 3871 3872 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3873 } else { 3874 ieee80211_bss_info_change_notify(sdata, 3875 vif_changed | changed[0]); 3876 } 3877 3878 ieee80211_recalc_ps(local); 3879 3880 /* leave this here to not change ordering in non-MLO cases */ 3881 if (!ieee80211_vif_is_mld(&sdata->vif)) 3882 ieee80211_recalc_smps(sdata, &sdata->deflink); 3883 ieee80211_recalc_ps_vif(sdata); 3884 3885 netif_carrier_on(sdata->dev); 3886 } 3887 3888 static void ieee80211_ml_reconf_reset(struct ieee80211_sub_if_data *sdata) 3889 { 3890 struct ieee80211_mgd_assoc_data *add_links_data = 3891 sdata->u.mgd.reconf.add_links_data; 3892 3893 if (!ieee80211_vif_is_mld(&sdata->vif) || 3894 !(sdata->u.mgd.reconf.added_links | 3895 sdata->u.mgd.reconf.removed_links)) 3896 return; 3897 3898 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3899 &sdata->u.mgd.reconf.wk); 3900 sdata->u.mgd.reconf.added_links = 0; 3901 sdata->u.mgd.reconf.removed_links = 0; 3902 sdata->u.mgd.reconf.dialog_token = 0; 3903 3904 if (add_links_data) { 3905 struct cfg80211_mlo_reconf_done_data done_data = {}; 3906 u8 link_id; 3907 3908 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3909 link_id++) 3910 done_data.links[link_id].bss = 3911 add_links_data->link[link_id].bss; 3912 3913 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 3914 3915 kfree(sdata->u.mgd.reconf.add_links_data); 3916 sdata->u.mgd.reconf.add_links_data = NULL; 3917 } 3918 } 3919 3920 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3921 u16 stype, u16 reason, bool tx, 3922 u8 *frame_buf) 3923 { 3924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3925 struct ieee80211_local *local = sdata->local; 3926 struct sta_info *ap_sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 3927 unsigned int link_id; 3928 u64 changed = 0; 3929 struct ieee80211_prep_tx_info info = { 3930 .subtype = stype, 3931 .was_assoc = true, 3932 .link_id = ffs(sdata->vif.active_links) - 1, 3933 }; 3934 3935 lockdep_assert_wiphy(local->hw.wiphy); 3936 3937 if (WARN_ON(!ap_sta)) 3938 return; 3939 3940 if (WARN_ON_ONCE(tx && !frame_buf)) 3941 return; 3942 3943 if (WARN_ON(!ifmgd->associated)) 3944 return; 3945 3946 ieee80211_stop_poll(sdata); 3947 3948 ifmgd->associated = false; 3949 3950 if (tx) { 3951 bool tx_link_found = false; 3952 3953 for (link_id = 0; 3954 link_id < ARRAY_SIZE(sdata->link); 3955 link_id++) { 3956 struct ieee80211_link_data *link; 3957 3958 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 3959 continue; 3960 3961 link = sdata_dereference(sdata->link[link_id], sdata); 3962 if (WARN_ON_ONCE(!link)) 3963 continue; 3964 3965 if (link->u.mgd.csa.blocked_tx) 3966 continue; 3967 3968 tx_link_found = true; 3969 break; 3970 } 3971 3972 tx = tx_link_found; 3973 } 3974 3975 /* other links will be destroyed */ 3976 sdata->deflink.conf->bss = NULL; 3977 sdata->deflink.conf->epcs_support = false; 3978 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3979 3980 netif_carrier_off(sdata->dev); 3981 3982 /* 3983 * if we want to get out of ps before disassoc (why?) we have 3984 * to do it before sending disassoc, as otherwise the null-packet 3985 * won't be valid. 3986 */ 3987 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3988 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3989 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3990 } 3991 local->ps_sdata = NULL; 3992 3993 /* disable per-vif ps */ 3994 ieee80211_recalc_ps_vif(sdata); 3995 3996 /* make sure ongoing transmission finishes */ 3997 synchronize_net(); 3998 3999 /* 4000 * drop any frame before deauth/disassoc, this can be data or 4001 * management frame. Since we are disconnecting, we should not 4002 * insist sending these frames which can take time and delay 4003 * the disconnection and possible the roaming. 4004 */ 4005 ieee80211_flush_queues(local, sdata, true); 4006 4007 if (tx) { 4008 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4009 4010 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4011 sdata->vif.cfg.ap_addr, stype, 4012 reason, true, frame_buf); 4013 4014 /* flush out frame - make sure the deauth was actually sent */ 4015 ieee80211_flush_queues(local, sdata, false); 4016 4017 drv_mgd_complete_tx(sdata->local, sdata, &info); 4018 } else if (frame_buf) { 4019 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 4020 sdata->vif.cfg.ap_addr, stype, 4021 reason, false, frame_buf); 4022 } 4023 4024 /* clear AP addr only after building the needed mgmt frames */ 4025 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4026 eth_zero_addr(sdata->vif.cfg.ap_addr); 4027 4028 sdata->vif.cfg.ssid_len = 0; 4029 4030 /* Remove TDLS peers */ 4031 __sta_info_flush(sdata, false, -1, ap_sta); 4032 4033 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4034 /* Only move the AP state */ 4035 sta_info_move_state(ap_sta, IEEE80211_STA_NONE); 4036 } else { 4037 /* Remove AP peer */ 4038 sta_info_flush(sdata, -1); 4039 } 4040 4041 /* finally reset all BSS / config parameters */ 4042 if (!ieee80211_vif_is_mld(&sdata->vif)) 4043 changed |= ieee80211_reset_erp_info(sdata); 4044 4045 ieee80211_led_assoc(local, 0); 4046 changed |= BSS_CHANGED_ASSOC; 4047 sdata->vif.cfg.assoc = false; 4048 4049 sdata->deflink.u.mgd.p2p_noa_index = -1; 4050 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 4051 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 4052 4053 /* on the next assoc, re-program HT/VHT parameters */ 4054 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 4055 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 4056 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 4057 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 4058 4059 /* 4060 * reset MU-MIMO ownership and group data in default link, 4061 * if used, other links are destroyed 4062 */ 4063 memset(sdata->vif.bss_conf.mu_group.membership, 0, 4064 sizeof(sdata->vif.bss_conf.mu_group.membership)); 4065 memset(sdata->vif.bss_conf.mu_group.position, 0, 4066 sizeof(sdata->vif.bss_conf.mu_group.position)); 4067 if (!ieee80211_vif_is_mld(&sdata->vif)) 4068 changed |= BSS_CHANGED_MU_GROUPS; 4069 sdata->vif.bss_conf.mu_mimo_owner = false; 4070 4071 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 4072 4073 timer_delete_sync(&local->dynamic_ps_timer); 4074 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 4075 4076 /* Disable ARP filtering */ 4077 if (sdata->vif.cfg.arp_addr_cnt) 4078 changed |= BSS_CHANGED_ARP_FILTER; 4079 4080 sdata->vif.bss_conf.qos = false; 4081 if (!ieee80211_vif_is_mld(&sdata->vif)) { 4082 changed |= BSS_CHANGED_QOS; 4083 /* The BSSID (not really interesting) and HT changed */ 4084 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 4085 ieee80211_bss_info_change_notify(sdata, changed); 4086 } else { 4087 ieee80211_vif_cfg_change_notify(sdata, changed); 4088 } 4089 4090 if (sdata->vif.driver_flags & IEEE80211_VIF_REMOVE_AP_AFTER_DISASSOC) { 4091 /* 4092 * After notifying the driver about the disassoc, 4093 * remove the ap sta. 4094 */ 4095 sta_info_flush(sdata, -1); 4096 } 4097 4098 /* disassociated - set to defaults now */ 4099 ieee80211_set_wmm_default(&sdata->deflink, false, false); 4100 4101 timer_delete_sync(&sdata->u.mgd.conn_mon_timer); 4102 timer_delete_sync(&sdata->u.mgd.bcn_mon_timer); 4103 timer_delete_sync(&sdata->u.mgd.timer); 4104 4105 sdata->vif.bss_conf.dtim_period = 0; 4106 sdata->vif.bss_conf.beacon_rate = NULL; 4107 4108 sdata->deflink.u.mgd.have_beacon = false; 4109 sdata->deflink.u.mgd.tracking_signal_avg = false; 4110 sdata->deflink.u.mgd.disable_wmm_tracking = false; 4111 4112 ifmgd->flags = 0; 4113 4114 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 4115 struct ieee80211_link_data *link; 4116 4117 link = sdata_dereference(sdata->link[link_id], sdata); 4118 if (!link) 4119 continue; 4120 ieee80211_link_release_channel(link); 4121 } 4122 4123 sdata->vif.bss_conf.csa_active = false; 4124 sdata->deflink.u.mgd.csa.blocked_tx = false; 4125 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4126 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 4127 ieee80211_vif_unblock_queues_csa(sdata); 4128 4129 /* existing TX TSPEC sessions no longer exist */ 4130 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 4131 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 4132 4133 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 4134 sdata->vif.bss_conf.pwr_reduction = 0; 4135 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 4136 4137 sdata->vif.cfg.eml_cap = 0; 4138 sdata->vif.cfg.eml_med_sync_delay = 0; 4139 sdata->vif.cfg.mld_capa_op = 0; 4140 4141 memset(&sdata->u.mgd.ttlm_info, 0, 4142 sizeof(sdata->u.mgd.ttlm_info)); 4143 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 4144 4145 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 4146 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4147 &ifmgd->neg_ttlm_timeout_work); 4148 4149 sdata->u.mgd.removed_links = 0; 4150 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 4151 &sdata->u.mgd.ml_reconf_work); 4152 4153 wiphy_work_cancel(sdata->local->hw.wiphy, 4154 &ifmgd->teardown_ttlm_work); 4155 4156 /* if disconnection happens in the middle of the ML reconfiguration 4157 * flow, cfg80211 must called to release the BSS references obtained 4158 * when the flow started. 4159 */ 4160 ieee80211_ml_reconf_reset(sdata); 4161 4162 ieee80211_vif_set_links(sdata, 0, 0); 4163 4164 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 4165 4166 ifmgd->epcs.enabled = false; 4167 ifmgd->epcs.dialog_token = 0; 4168 4169 memset(ifmgd->userspace_selectors, 0, 4170 sizeof(ifmgd->userspace_selectors)); 4171 } 4172 4173 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 4174 { 4175 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4176 struct ieee80211_local *local = sdata->local; 4177 4178 lockdep_assert_wiphy(local->hw.wiphy); 4179 4180 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 4181 return; 4182 4183 __ieee80211_stop_poll(sdata); 4184 4185 ieee80211_recalc_ps(local); 4186 4187 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 4188 return; 4189 4190 /* 4191 * We've received a probe response, but are not sure whether 4192 * we have or will be receiving any beacons or data, so let's 4193 * schedule the timers again, just in case. 4194 */ 4195 ieee80211_sta_reset_beacon_monitor(sdata); 4196 4197 mod_timer(&ifmgd->conn_mon_timer, 4198 round_jiffies_up(jiffies + 4199 IEEE80211_CONNECTION_IDLE_TIME)); 4200 } 4201 4202 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 4203 struct ieee80211_hdr *hdr, 4204 u16 tx_time) 4205 { 4206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4207 u16 tid; 4208 int ac; 4209 struct ieee80211_sta_tx_tspec *tx_tspec; 4210 unsigned long now = jiffies; 4211 4212 if (!ieee80211_is_data_qos(hdr->frame_control)) 4213 return; 4214 4215 tid = ieee80211_get_tid(hdr); 4216 ac = ieee80211_ac_from_tid(tid); 4217 tx_tspec = &ifmgd->tx_tspec[ac]; 4218 4219 if (likely(!tx_tspec->admitted_time)) 4220 return; 4221 4222 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 4223 tx_tspec->consumed_tx_time = 0; 4224 tx_tspec->time_slice_start = now; 4225 4226 if (tx_tspec->downgraded) { 4227 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 4228 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4229 &ifmgd->tx_tspec_wk, 0); 4230 } 4231 } 4232 4233 if (tx_tspec->downgraded) 4234 return; 4235 4236 tx_tspec->consumed_tx_time += tx_time; 4237 4238 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 4239 tx_tspec->downgraded = true; 4240 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 4241 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 4242 &ifmgd->tx_tspec_wk, 0); 4243 } 4244 } 4245 4246 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 4247 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 4248 { 4249 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 4250 4251 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 4252 !sdata->u.mgd.probe_send_count) 4253 return; 4254 4255 if (ack) 4256 sdata->u.mgd.probe_send_count = 0; 4257 else 4258 sdata->u.mgd.nullfunc_failed = true; 4259 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 4260 } 4261 4262 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 4263 const u8 *src, const u8 *dst, 4264 const u8 *ssid, size_t ssid_len, 4265 struct ieee80211_channel *channel) 4266 { 4267 struct sk_buff *skb; 4268 4269 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 4270 ssid, ssid_len, NULL, 0, 4271 IEEE80211_PROBE_FLAG_DIRECTED); 4272 if (skb) 4273 ieee80211_tx_skb(sdata, skb); 4274 } 4275 4276 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 4277 { 4278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4279 u8 *dst = sdata->vif.cfg.ap_addr; 4280 u8 unicast_limit = max(1, max_probe_tries - 3); 4281 struct sta_info *sta; 4282 4283 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4284 4285 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 4286 return; 4287 4288 /* 4289 * Try sending broadcast probe requests for the last three 4290 * probe requests after the first ones failed since some 4291 * buggy APs only support broadcast probe requests. 4292 */ 4293 if (ifmgd->probe_send_count >= unicast_limit) 4294 dst = NULL; 4295 4296 /* 4297 * When the hardware reports an accurate Tx ACK status, it's 4298 * better to send a nullfunc frame instead of a probe request, 4299 * as it will kick us off the AP quickly if we aren't associated 4300 * anymore. The timeout will be reset if the frame is ACKed by 4301 * the AP. 4302 */ 4303 ifmgd->probe_send_count++; 4304 4305 if (dst) { 4306 sta = sta_info_get(sdata, dst); 4307 if (!WARN_ON(!sta)) 4308 ieee80211_check_fast_rx(sta); 4309 } 4310 4311 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 4312 ifmgd->nullfunc_failed = false; 4313 ieee80211_send_nullfunc(sdata->local, sdata, false); 4314 } else { 4315 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 4316 sdata->vif.cfg.ssid, 4317 sdata->vif.cfg.ssid_len, 4318 sdata->deflink.conf->bss->channel); 4319 } 4320 4321 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 4322 run_again(sdata, ifmgd->probe_timeout); 4323 } 4324 4325 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 4326 bool beacon) 4327 { 4328 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4329 bool already = false; 4330 4331 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4332 4333 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 4334 return; 4335 4336 if (!ieee80211_sdata_running(sdata)) 4337 return; 4338 4339 if (!ifmgd->associated) 4340 return; 4341 4342 if (sdata->local->tmp_channel || sdata->local->scanning) 4343 return; 4344 4345 if (sdata->local->suspending) { 4346 /* reschedule after resume */ 4347 ieee80211_reset_ap_probe(sdata); 4348 return; 4349 } 4350 4351 if (beacon) { 4352 mlme_dbg_ratelimited(sdata, 4353 "detected beacon loss from AP (missed %d beacons) - probing\n", 4354 beacon_loss_count); 4355 4356 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 4357 } 4358 4359 /* 4360 * The driver/our work has already reported this event or the 4361 * connection monitoring has kicked in and we have already sent 4362 * a probe request. Or maybe the AP died and the driver keeps 4363 * reporting until we disassociate... 4364 * 4365 * In either case we have to ignore the current call to this 4366 * function (except for setting the correct probe reason bit) 4367 * because otherwise we would reset the timer every time and 4368 * never check whether we received a probe response! 4369 */ 4370 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 4371 already = true; 4372 4373 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 4374 4375 if (already) 4376 return; 4377 4378 ieee80211_recalc_ps(sdata->local); 4379 4380 ifmgd->probe_send_count = 0; 4381 ieee80211_mgd_probe_ap_send(sdata); 4382 } 4383 4384 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 4385 struct ieee80211_vif *vif) 4386 { 4387 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4388 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4389 struct cfg80211_bss *cbss; 4390 struct sk_buff *skb; 4391 const struct element *ssid; 4392 int ssid_len; 4393 4394 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4395 4396 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 4397 ieee80211_vif_is_mld(&sdata->vif))) 4398 return NULL; 4399 4400 if (ifmgd->associated) 4401 cbss = sdata->deflink.conf->bss; 4402 else if (ifmgd->auth_data) 4403 cbss = ifmgd->auth_data->bss; 4404 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 4405 cbss = ifmgd->assoc_data->link[0].bss; 4406 else 4407 return NULL; 4408 4409 rcu_read_lock(); 4410 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 4411 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 4412 "invalid SSID element (len=%d)", 4413 ssid ? ssid->datalen : -1)) 4414 ssid_len = 0; 4415 else 4416 ssid_len = ssid->datalen; 4417 4418 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 4419 (u32) -1, cbss->channel, 4420 ssid->data, ssid_len, 4421 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 4422 rcu_read_unlock(); 4423 4424 return skb; 4425 } 4426 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 4427 4428 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 4429 const u8 *buf, size_t len, bool tx, 4430 u16 reason, bool reconnect) 4431 { 4432 struct ieee80211_event event = { 4433 .type = MLME_EVENT, 4434 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 4435 .u.mlme.reason = reason, 4436 }; 4437 4438 if (tx) 4439 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 4440 else 4441 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 4442 4443 drv_event_callback(sdata->local, sdata, &event); 4444 } 4445 4446 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 4447 { 4448 struct ieee80211_local *local = sdata->local; 4449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4450 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 4451 4452 lockdep_assert_wiphy(local->hw.wiphy); 4453 4454 if (!ifmgd->associated) 4455 return; 4456 4457 if (!ifmgd->driver_disconnect) { 4458 unsigned int link_id; 4459 4460 /* 4461 * AP is probably out of range (or not reachable for another 4462 * reason) so remove the bss structs for that AP. In the case 4463 * of multi-link, it's not clear that all of them really are 4464 * out of range, but if they weren't the driver likely would 4465 * have switched to just have a single link active? 4466 */ 4467 for (link_id = 0; 4468 link_id < ARRAY_SIZE(sdata->link); 4469 link_id++) { 4470 struct ieee80211_link_data *link; 4471 4472 link = sdata_dereference(sdata->link[link_id], sdata); 4473 if (!link || !link->conf->bss) 4474 continue; 4475 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4476 link->conf->bss = NULL; 4477 } 4478 } 4479 4480 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4481 ifmgd->driver_disconnect ? 4482 WLAN_REASON_DEAUTH_LEAVING : 4483 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4484 true, frame_buf); 4485 /* the other links will be destroyed */ 4486 sdata->vif.bss_conf.csa_active = false; 4487 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4488 sdata->deflink.u.mgd.csa.blocked_tx = false; 4489 ieee80211_vif_unblock_queues_csa(sdata); 4490 4491 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 4492 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4493 ifmgd->reconnect); 4494 ifmgd->reconnect = false; 4495 } 4496 4497 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4498 struct wiphy_work *work) 4499 { 4500 struct ieee80211_sub_if_data *sdata = 4501 container_of(work, struct ieee80211_sub_if_data, 4502 u.mgd.beacon_connection_loss_work); 4503 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4504 4505 if (ifmgd->connection_loss) { 4506 sdata_info(sdata, "Connection to AP %pM lost\n", 4507 sdata->vif.cfg.ap_addr); 4508 __ieee80211_disconnect(sdata); 4509 ifmgd->connection_loss = false; 4510 } else if (ifmgd->driver_disconnect) { 4511 sdata_info(sdata, 4512 "Driver requested disconnection from AP %pM\n", 4513 sdata->vif.cfg.ap_addr); 4514 __ieee80211_disconnect(sdata); 4515 ifmgd->driver_disconnect = false; 4516 } else { 4517 if (ifmgd->associated) 4518 sdata->deflink.u.mgd.beacon_loss_count++; 4519 ieee80211_mgd_probe_ap(sdata, true); 4520 } 4521 } 4522 4523 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4524 struct wiphy_work *work) 4525 { 4526 struct ieee80211_sub_if_data *sdata = 4527 container_of(work, struct ieee80211_sub_if_data, 4528 u.mgd.csa_connection_drop_work); 4529 4530 __ieee80211_disconnect(sdata); 4531 } 4532 4533 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4534 { 4535 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4536 struct ieee80211_hw *hw = &sdata->local->hw; 4537 4538 trace_api_beacon_loss(sdata); 4539 4540 sdata->u.mgd.connection_loss = false; 4541 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4542 } 4543 EXPORT_SYMBOL(ieee80211_beacon_loss); 4544 4545 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4546 { 4547 struct ieee80211_sub_if_data *sdata; 4548 struct ieee80211_hw *hw; 4549 4550 KUNIT_STATIC_STUB_REDIRECT(ieee80211_connection_loss, vif); 4551 4552 sdata = vif_to_sdata(vif); 4553 hw = &sdata->local->hw; 4554 4555 trace_api_connection_loss(sdata); 4556 4557 sdata->u.mgd.connection_loss = true; 4558 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4559 } 4560 EXPORT_SYMBOL(ieee80211_connection_loss); 4561 4562 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4563 { 4564 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4565 struct ieee80211_hw *hw = &sdata->local->hw; 4566 4567 trace_api_disconnect(sdata, reconnect); 4568 4569 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4570 return; 4571 4572 sdata->u.mgd.driver_disconnect = true; 4573 sdata->u.mgd.reconnect = reconnect; 4574 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4575 } 4576 EXPORT_SYMBOL(ieee80211_disconnect); 4577 4578 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4579 bool assoc) 4580 { 4581 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4582 4583 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4584 4585 sdata->u.mgd.auth_data = NULL; 4586 4587 if (!assoc) { 4588 /* 4589 * we are not authenticated yet, the only timer that could be 4590 * running is the timeout for the authentication response which 4591 * which is not relevant anymore. 4592 */ 4593 timer_delete_sync(&sdata->u.mgd.timer); 4594 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4595 4596 /* other links are destroyed */ 4597 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4598 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4599 BSS_CHANGED_BSSID); 4600 sdata->u.mgd.flags = 0; 4601 4602 ieee80211_link_release_channel(&sdata->deflink); 4603 ieee80211_vif_set_links(sdata, 0, 0); 4604 } 4605 4606 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4607 kfree(auth_data); 4608 } 4609 4610 enum assoc_status { 4611 ASSOC_SUCCESS, 4612 ASSOC_REJECTED, 4613 ASSOC_TIMEOUT, 4614 ASSOC_ABANDON, 4615 }; 4616 4617 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4618 enum assoc_status status) 4619 { 4620 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4621 4622 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4623 4624 sdata->u.mgd.assoc_data = NULL; 4625 4626 if (status != ASSOC_SUCCESS) { 4627 /* 4628 * we are not associated yet, the only timer that could be 4629 * running is the timeout for the association response which 4630 * which is not relevant anymore. 4631 */ 4632 timer_delete_sync(&sdata->u.mgd.timer); 4633 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4634 4635 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4636 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4637 BSS_CHANGED_BSSID); 4638 sdata->u.mgd.flags = 0; 4639 sdata->vif.bss_conf.mu_mimo_owner = false; 4640 4641 if (status != ASSOC_REJECTED) { 4642 struct cfg80211_assoc_failure data = { 4643 .timeout = status == ASSOC_TIMEOUT, 4644 }; 4645 int i; 4646 4647 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4648 ARRAY_SIZE(assoc_data->link)); 4649 4650 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4651 data.bss[i] = assoc_data->link[i].bss; 4652 4653 if (ieee80211_vif_is_mld(&sdata->vif)) 4654 data.ap_mld_addr = assoc_data->ap_addr; 4655 4656 cfg80211_assoc_failure(sdata->dev, &data); 4657 } 4658 4659 ieee80211_link_release_channel(&sdata->deflink); 4660 ieee80211_vif_set_links(sdata, 0, 0); 4661 } 4662 4663 kfree(assoc_data); 4664 } 4665 4666 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4667 struct ieee80211_mgmt *mgmt, size_t len) 4668 { 4669 struct ieee80211_local *local = sdata->local; 4670 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4671 const struct element *challenge; 4672 u8 *pos; 4673 u32 tx_flags = 0; 4674 struct ieee80211_prep_tx_info info = { 4675 .subtype = IEEE80211_STYPE_AUTH, 4676 .link_id = auth_data->link_id, 4677 }; 4678 4679 pos = mgmt->u.auth.variable; 4680 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4681 len - (pos - (u8 *)mgmt)); 4682 if (!challenge) 4683 return; 4684 auth_data->expected_transaction = 4; 4685 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4686 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4687 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4688 IEEE80211_TX_INTFL_MLME_CONN_TX; 4689 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4690 (void *)challenge, 4691 challenge->datalen + sizeof(*challenge), 4692 auth_data->ap_addr, auth_data->ap_addr, 4693 auth_data->key, auth_data->key_len, 4694 auth_data->key_idx, tx_flags); 4695 } 4696 4697 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4698 { 4699 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4700 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4701 struct sta_info *sta; 4702 4703 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4704 4705 sdata_info(sdata, "authenticated\n"); 4706 ifmgd->auth_data->done = true; 4707 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4708 ifmgd->auth_data->timeout_started = true; 4709 run_again(sdata, ifmgd->auth_data->timeout); 4710 4711 /* move station state to auth */ 4712 sta = sta_info_get(sdata, ap_addr); 4713 if (!sta) { 4714 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4715 return false; 4716 } 4717 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4718 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4719 return false; 4720 } 4721 4722 return true; 4723 } 4724 4725 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4726 struct ieee80211_mgmt *mgmt, size_t len) 4727 { 4728 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4729 u16 auth_alg, auth_transaction, status_code; 4730 struct ieee80211_event event = { 4731 .type = MLME_EVENT, 4732 .u.mlme.data = AUTH_EVENT, 4733 }; 4734 struct ieee80211_prep_tx_info info = { 4735 .subtype = IEEE80211_STYPE_AUTH, 4736 }; 4737 4738 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4739 4740 if (len < 24 + 6) 4741 return; 4742 4743 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4744 return; 4745 4746 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4747 return; 4748 4749 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4750 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4751 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4752 4753 info.link_id = ifmgd->auth_data->link_id; 4754 4755 if (auth_alg != ifmgd->auth_data->algorithm || 4756 (auth_alg != WLAN_AUTH_SAE && 4757 auth_transaction != ifmgd->auth_data->expected_transaction) || 4758 (auth_alg == WLAN_AUTH_SAE && 4759 (auth_transaction < ifmgd->auth_data->expected_transaction || 4760 auth_transaction > 2))) { 4761 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4762 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4763 auth_transaction, 4764 ifmgd->auth_data->expected_transaction); 4765 goto notify_driver; 4766 } 4767 4768 if (status_code != WLAN_STATUS_SUCCESS) { 4769 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4770 4771 if (auth_alg == WLAN_AUTH_SAE && 4772 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4773 (auth_transaction == 1 && 4774 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4775 status_code == WLAN_STATUS_SAE_PK)))) { 4776 /* waiting for userspace now */ 4777 ifmgd->auth_data->waiting = true; 4778 ifmgd->auth_data->timeout = 4779 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4780 ifmgd->auth_data->timeout_started = true; 4781 run_again(sdata, ifmgd->auth_data->timeout); 4782 goto notify_driver; 4783 } 4784 4785 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4786 mgmt->sa, status_code); 4787 ieee80211_destroy_auth_data(sdata, false); 4788 event.u.mlme.status = MLME_DENIED; 4789 event.u.mlme.reason = status_code; 4790 drv_event_callback(sdata->local, sdata, &event); 4791 goto notify_driver; 4792 } 4793 4794 switch (ifmgd->auth_data->algorithm) { 4795 case WLAN_AUTH_OPEN: 4796 case WLAN_AUTH_LEAP: 4797 case WLAN_AUTH_FT: 4798 case WLAN_AUTH_SAE: 4799 case WLAN_AUTH_FILS_SK: 4800 case WLAN_AUTH_FILS_SK_PFS: 4801 case WLAN_AUTH_FILS_PK: 4802 break; 4803 case WLAN_AUTH_SHARED_KEY: 4804 if (ifmgd->auth_data->expected_transaction != 4) { 4805 ieee80211_auth_challenge(sdata, mgmt, len); 4806 /* need another frame */ 4807 return; 4808 } 4809 break; 4810 default: 4811 WARN_ONCE(1, "invalid auth alg %d", 4812 ifmgd->auth_data->algorithm); 4813 goto notify_driver; 4814 } 4815 4816 event.u.mlme.status = MLME_SUCCESS; 4817 info.success = 1; 4818 drv_event_callback(sdata->local, sdata, &event); 4819 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4820 (auth_transaction == 2 && 4821 ifmgd->auth_data->expected_transaction == 2)) { 4822 if (!ieee80211_mark_sta_auth(sdata)) 4823 return; /* ignore frame -- wait for timeout */ 4824 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4825 auth_transaction == 2) { 4826 sdata_info(sdata, "SAE peer confirmed\n"); 4827 ifmgd->auth_data->peer_confirmed = true; 4828 } 4829 4830 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4831 notify_driver: 4832 drv_mgd_complete_tx(sdata->local, sdata, &info); 4833 } 4834 4835 #define case_WLAN(type) \ 4836 case WLAN_REASON_##type: return #type 4837 4838 const char *ieee80211_get_reason_code_string(u16 reason_code) 4839 { 4840 switch (reason_code) { 4841 case_WLAN(UNSPECIFIED); 4842 case_WLAN(PREV_AUTH_NOT_VALID); 4843 case_WLAN(DEAUTH_LEAVING); 4844 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4845 case_WLAN(DISASSOC_AP_BUSY); 4846 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4847 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4848 case_WLAN(DISASSOC_STA_HAS_LEFT); 4849 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4850 case_WLAN(DISASSOC_BAD_POWER); 4851 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4852 case_WLAN(INVALID_IE); 4853 case_WLAN(MIC_FAILURE); 4854 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4855 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4856 case_WLAN(IE_DIFFERENT); 4857 case_WLAN(INVALID_GROUP_CIPHER); 4858 case_WLAN(INVALID_PAIRWISE_CIPHER); 4859 case_WLAN(INVALID_AKMP); 4860 case_WLAN(UNSUPP_RSN_VERSION); 4861 case_WLAN(INVALID_RSN_IE_CAP); 4862 case_WLAN(IEEE8021X_FAILED); 4863 case_WLAN(CIPHER_SUITE_REJECTED); 4864 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4865 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4866 case_WLAN(DISASSOC_LOW_ACK); 4867 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4868 case_WLAN(QSTA_LEAVE_QBSS); 4869 case_WLAN(QSTA_NOT_USE); 4870 case_WLAN(QSTA_REQUIRE_SETUP); 4871 case_WLAN(QSTA_TIMEOUT); 4872 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4873 case_WLAN(MESH_PEER_CANCELED); 4874 case_WLAN(MESH_MAX_PEERS); 4875 case_WLAN(MESH_CONFIG); 4876 case_WLAN(MESH_CLOSE); 4877 case_WLAN(MESH_MAX_RETRIES); 4878 case_WLAN(MESH_CONFIRM_TIMEOUT); 4879 case_WLAN(MESH_INVALID_GTK); 4880 case_WLAN(MESH_INCONSISTENT_PARAM); 4881 case_WLAN(MESH_INVALID_SECURITY); 4882 case_WLAN(MESH_PATH_ERROR); 4883 case_WLAN(MESH_PATH_NOFORWARD); 4884 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4885 case_WLAN(MAC_EXISTS_IN_MBSS); 4886 case_WLAN(MESH_CHAN_REGULATORY); 4887 case_WLAN(MESH_CHAN); 4888 default: return "<unknown>"; 4889 } 4890 } 4891 4892 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4893 struct ieee80211_mgmt *mgmt, size_t len) 4894 { 4895 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4896 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4897 4898 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4899 4900 if (len < 24 + 2) 4901 return; 4902 4903 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4904 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4905 return; 4906 } 4907 4908 if (ifmgd->associated && 4909 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4910 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4911 sdata->vif.cfg.ap_addr, reason_code, 4912 ieee80211_get_reason_code_string(reason_code)); 4913 4914 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4915 4916 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4917 reason_code, false); 4918 return; 4919 } 4920 4921 if (ifmgd->assoc_data && 4922 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4923 sdata_info(sdata, 4924 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4925 ifmgd->assoc_data->ap_addr, reason_code, 4926 ieee80211_get_reason_code_string(reason_code)); 4927 4928 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4929 4930 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4931 return; 4932 } 4933 } 4934 4935 4936 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4937 struct ieee80211_mgmt *mgmt, size_t len) 4938 { 4939 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4940 u16 reason_code; 4941 4942 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4943 4944 if (len < 24 + 2) 4945 return; 4946 4947 if (!ifmgd->associated || 4948 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4949 return; 4950 4951 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4952 4953 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4954 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4955 return; 4956 } 4957 4958 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4959 sdata->vif.cfg.ap_addr, reason_code, 4960 ieee80211_get_reason_code_string(reason_code)); 4961 4962 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4963 4964 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4965 false); 4966 } 4967 4968 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4969 struct ieee80211_supported_band *sband, 4970 const struct link_sta_info *link_sta, 4971 const struct ieee802_11_elems *elems) 4972 { 4973 const struct ieee80211_sta_he_cap *own_he_cap = 4974 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4975 4976 if (elems->ext_capab_len < 10) 4977 return false; 4978 4979 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4980 return false; 4981 4982 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4983 IEEE80211_HE_MAC_CAP0_TWT_RES && 4984 own_he_cap && 4985 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4986 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4987 } 4988 4989 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4990 struct ieee80211_supported_band *sband, 4991 struct ieee80211_link_data *link, 4992 struct link_sta_info *link_sta, 4993 struct ieee802_11_elems *elems) 4994 { 4995 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4996 4997 if (link->conf->twt_requester != twt) { 4998 link->conf->twt_requester = twt; 4999 return BSS_CHANGED_TWT; 5000 } 5001 return 0; 5002 } 5003 5004 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 5005 struct ieee80211_bss_conf *bss_conf, 5006 struct ieee80211_supported_band *sband, 5007 struct link_sta_info *link_sta) 5008 { 5009 const struct ieee80211_sta_he_cap *own_he_cap = 5010 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5011 5012 return bss_conf->he_support && 5013 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 5014 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 5015 own_he_cap && 5016 (own_he_cap->he_cap_elem.mac_cap_info[2] & 5017 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 5018 } 5019 5020 static void ieee80211_epcs_changed(struct ieee80211_sub_if_data *sdata, 5021 bool enabled) 5022 { 5023 /* in any case this is called, dialog token should be reset */ 5024 sdata->u.mgd.epcs.dialog_token = 0; 5025 5026 if (sdata->u.mgd.epcs.enabled == enabled) 5027 return; 5028 5029 sdata->u.mgd.epcs.enabled = enabled; 5030 cfg80211_epcs_changed(sdata->dev, enabled); 5031 } 5032 5033 static void ieee80211_epcs_teardown(struct ieee80211_sub_if_data *sdata) 5034 { 5035 struct ieee80211_local *local = sdata->local; 5036 u8 link_id; 5037 5038 if (!sdata->u.mgd.epcs.enabled) 5039 return; 5040 5041 lockdep_assert_wiphy(local->hw.wiphy); 5042 5043 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5044 struct ieee802_11_elems *elems; 5045 struct ieee80211_link_data *link; 5046 const struct cfg80211_bss_ies *ies; 5047 bool ret; 5048 5049 rcu_read_lock(); 5050 5051 link = sdata_dereference(sdata->link[link_id], sdata); 5052 if (!link || !link->conf || !link->conf->bss) { 5053 rcu_read_unlock(); 5054 continue; 5055 } 5056 5057 if (link->u.mgd.disable_wmm_tracking) { 5058 rcu_read_unlock(); 5059 ieee80211_set_wmm_default(link, false, false); 5060 continue; 5061 } 5062 5063 ies = rcu_dereference(link->conf->bss->beacon_ies); 5064 if (!ies) { 5065 rcu_read_unlock(); 5066 ieee80211_set_wmm_default(link, false, false); 5067 continue; 5068 } 5069 5070 elems = ieee802_11_parse_elems(ies->data, ies->len, false, 5071 NULL); 5072 if (!elems) { 5073 rcu_read_unlock(); 5074 ieee80211_set_wmm_default(link, false, false); 5075 continue; 5076 } 5077 5078 ret = _ieee80211_sta_wmm_params(local, link, 5079 elems->wmm_param, 5080 elems->wmm_param_len, 5081 elems->mu_edca_param_set); 5082 5083 kfree(elems); 5084 rcu_read_unlock(); 5085 5086 if (!ret) { 5087 ieee80211_set_wmm_default(link, false, false); 5088 continue; 5089 } 5090 5091 ieee80211_mgd_set_link_qos_params(link); 5092 ieee80211_link_info_change_notify(sdata, link, BSS_CHANGED_QOS); 5093 } 5094 } 5095 5096 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 5097 struct link_sta_info *link_sta, 5098 struct cfg80211_bss *cbss, 5099 struct ieee80211_mgmt *mgmt, 5100 const u8 *elem_start, 5101 unsigned int elem_len, 5102 u64 *changed) 5103 { 5104 struct ieee80211_sub_if_data *sdata = link->sdata; 5105 struct ieee80211_mgd_assoc_data *assoc_data = 5106 sdata->u.mgd.assoc_data ?: sdata->u.mgd.reconf.add_links_data; 5107 struct ieee80211_bss_conf *bss_conf = link->conf; 5108 struct ieee80211_local *local = sdata->local; 5109 unsigned int link_id = link->link_id; 5110 struct ieee80211_elems_parse_params parse_params = { 5111 .mode = link->u.mgd.conn.mode, 5112 .start = elem_start, 5113 .len = elem_len, 5114 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 5115 .from_ap = true, 5116 }; 5117 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 5118 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5119 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 5120 const struct cfg80211_bss_ies *bss_ies = NULL; 5121 struct ieee80211_supported_band *sband; 5122 struct ieee802_11_elems *elems; 5123 const __le16 prof_bss_param_ch_present = 5124 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 5125 u16 capab_info; 5126 bool ret; 5127 5128 elems = ieee802_11_parse_elems_full(&parse_params); 5129 if (!elems) 5130 return false; 5131 5132 if (link_id == assoc_data->assoc_link_id) { 5133 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5134 5135 /* 5136 * we should not get to this flow unless the association was 5137 * successful, so set the status directly to success 5138 */ 5139 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 5140 if (elems->ml_basic) { 5141 int bss_param_ch_cnt = 5142 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 5143 5144 if (bss_param_ch_cnt < 0) { 5145 ret = false; 5146 goto out; 5147 } 5148 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5149 bss_conf->bss_param_ch_cnt_link_id = link_id; 5150 } 5151 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 5152 !elems->prof || 5153 !(elems->prof->control & prof_bss_param_ch_present)) { 5154 ret = false; 5155 goto out; 5156 } else { 5157 const u8 *ptr = elems->prof->variable + 5158 elems->prof->sta_info_len - 1; 5159 int bss_param_ch_cnt; 5160 5161 /* 5162 * During parsing, we validated that these fields exist, 5163 * otherwise elems->prof would have been set to NULL. 5164 */ 5165 capab_info = get_unaligned_le16(ptr); 5166 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 5167 bss_param_ch_cnt = 5168 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 5169 bss_conf->bss_param_ch_cnt = bss_param_ch_cnt; 5170 bss_conf->bss_param_ch_cnt_link_id = link_id; 5171 5172 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5173 link_info(link, "association response status code=%u\n", 5174 assoc_data->link[link_id].status); 5175 ret = true; 5176 goto out; 5177 } 5178 } 5179 5180 if (!is_s1g && !elems->supp_rates) { 5181 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 5182 ret = false; 5183 goto out; 5184 } 5185 5186 link->u.mgd.tdls_chan_switch_prohibited = 5187 elems->ext_capab && elems->ext_capab_len >= 5 && 5188 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 5189 5190 /* 5191 * Some APs are erroneously not including some information in their 5192 * (re)association response frames. Try to recover by using the data 5193 * from the beacon or probe response. This seems to afflict mobile 5194 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 5195 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 5196 */ 5197 if (!ieee80211_hw_check(&local->hw, STRICT) && !is_6ghz && 5198 ((assoc_data->wmm && !elems->wmm_param) || 5199 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5200 (!elems->ht_cap_elem || !elems->ht_operation)) || 5201 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5202 (!elems->vht_cap_elem || !elems->vht_operation)))) { 5203 const struct cfg80211_bss_ies *ies; 5204 struct ieee802_11_elems *bss_elems; 5205 5206 rcu_read_lock(); 5207 ies = rcu_dereference(cbss->ies); 5208 if (ies) 5209 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 5210 GFP_ATOMIC); 5211 rcu_read_unlock(); 5212 if (!bss_ies) { 5213 ret = false; 5214 goto out; 5215 } 5216 5217 parse_params.start = bss_ies->data; 5218 parse_params.len = bss_ies->len; 5219 parse_params.bss = cbss; 5220 parse_params.link_id = -1; 5221 bss_elems = ieee802_11_parse_elems_full(&parse_params); 5222 if (!bss_elems) { 5223 ret = false; 5224 goto out; 5225 } 5226 5227 if (assoc_data->wmm && 5228 !elems->wmm_param && bss_elems->wmm_param) { 5229 elems->wmm_param = bss_elems->wmm_param; 5230 sdata_info(sdata, 5231 "AP bug: WMM param missing from AssocResp\n"); 5232 } 5233 5234 /* 5235 * Also check if we requested HT/VHT, otherwise the AP doesn't 5236 * have to include the IEs in the (re)association response. 5237 */ 5238 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 5239 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5240 elems->ht_cap_elem = bss_elems->ht_cap_elem; 5241 sdata_info(sdata, 5242 "AP bug: HT capability missing from AssocResp\n"); 5243 } 5244 if (!elems->ht_operation && bss_elems->ht_operation && 5245 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 5246 elems->ht_operation = bss_elems->ht_operation; 5247 sdata_info(sdata, 5248 "AP bug: HT operation missing from AssocResp\n"); 5249 } 5250 5251 if (is_5ghz) { 5252 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 5253 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5254 elems->vht_cap_elem = bss_elems->vht_cap_elem; 5255 sdata_info(sdata, 5256 "AP bug: VHT capa missing from AssocResp\n"); 5257 } 5258 5259 if (!elems->vht_operation && bss_elems->vht_operation && 5260 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5261 elems->vht_operation = bss_elems->vht_operation; 5262 sdata_info(sdata, 5263 "AP bug: VHT operation missing from AssocResp\n"); 5264 } 5265 } 5266 kfree(bss_elems); 5267 } 5268 5269 /* 5270 * We previously checked these in the beacon/probe response, so 5271 * they should be present here. This is just a safety net. 5272 * Note that the ieee80211_config_bw() below would also check 5273 * for this (and more), but this has better error reporting. 5274 */ 5275 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 5276 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 5277 sdata_info(sdata, 5278 "HT AP is missing WMM params or HT capability/operation\n"); 5279 ret = false; 5280 goto out; 5281 } 5282 5283 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 5284 (!elems->vht_cap_elem || !elems->vht_operation)) { 5285 sdata_info(sdata, 5286 "VHT AP is missing VHT capability/operation\n"); 5287 ret = false; 5288 goto out; 5289 } 5290 5291 /* check/update if AP changed anything in assoc response vs. scan */ 5292 if (ieee80211_config_bw(link, elems, 5293 link_id == assoc_data->assoc_link_id, 5294 changed, "assoc response")) { 5295 ret = false; 5296 goto out; 5297 } 5298 5299 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 5300 ret = false; 5301 goto out; 5302 } 5303 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 5304 5305 /* Set up internal HT/VHT capabilities */ 5306 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 5307 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 5308 elems->ht_cap_elem, 5309 link_sta); 5310 5311 if (elems->vht_cap_elem && 5312 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 5313 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 5314 const struct cfg80211_bss_ies *ies; 5315 5316 /* 5317 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 5318 * too large maximum MPDU length in the association response 5319 * (indicating 12k) that it cannot actually process ... 5320 * Work around that. 5321 */ 5322 rcu_read_lock(); 5323 ies = rcu_dereference(cbss->ies); 5324 if (ies) { 5325 const struct element *elem; 5326 5327 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 5328 ies->data, ies->len); 5329 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 5330 bss_vht_cap = (const void *)elem->data; 5331 } 5332 5333 if (ieee80211_hw_check(&local->hw, STRICT) && 5334 (!bss_vht_cap || memcmp(bss_vht_cap, elems->vht_cap_elem, 5335 sizeof(*bss_vht_cap)))) { 5336 rcu_read_unlock(); 5337 ret = false; 5338 link_info(link, "VHT capabilities mismatch\n"); 5339 goto out; 5340 } 5341 5342 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 5343 elems->vht_cap_elem, 5344 bss_vht_cap, link_sta); 5345 rcu_read_unlock(); 5346 } 5347 5348 if (elems->he_operation && 5349 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 5350 elems->he_cap) { 5351 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 5352 elems->he_cap, 5353 elems->he_cap_len, 5354 elems->he_6ghz_capa, 5355 link_sta); 5356 5357 bss_conf->he_support = link_sta->pub->he_cap.has_he; 5358 if (elems->rsnx && elems->rsnx_len && 5359 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 5360 wiphy_ext_feature_isset(local->hw.wiphy, 5361 NL80211_EXT_FEATURE_PROTECTED_TWT)) 5362 bss_conf->twt_protected = true; 5363 else 5364 bss_conf->twt_protected = false; 5365 5366 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 5367 link_sta, elems); 5368 5369 if (elems->eht_operation && elems->eht_cap && 5370 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 5371 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 5372 elems->he_cap, 5373 elems->he_cap_len, 5374 elems->eht_cap, 5375 elems->eht_cap_len, 5376 link_sta); 5377 5378 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 5379 bss_conf->epcs_support = bss_conf->eht_support && 5380 !!(elems->eht_cap->fixed.mac_cap_info[0] & 5381 IEEE80211_EHT_MAC_CAP0_EPCS_PRIO_ACCESS); 5382 5383 /* EPCS might be already enabled but a new added link 5384 * does not support EPCS. This should not really happen 5385 * in practice. 5386 */ 5387 if (sdata->u.mgd.epcs.enabled && 5388 !bss_conf->epcs_support) 5389 ieee80211_epcs_teardown(sdata); 5390 } else { 5391 bss_conf->eht_support = false; 5392 bss_conf->epcs_support = false; 5393 } 5394 } else { 5395 bss_conf->he_support = false; 5396 bss_conf->twt_requester = false; 5397 bss_conf->twt_protected = false; 5398 bss_conf->eht_support = false; 5399 bss_conf->epcs_support = false; 5400 } 5401 5402 bss_conf->twt_broadcast = 5403 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 5404 5405 if (bss_conf->he_support) { 5406 bss_conf->he_bss_color.color = 5407 le32_get_bits(elems->he_operation->he_oper_params, 5408 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 5409 bss_conf->he_bss_color.partial = 5410 le32_get_bits(elems->he_operation->he_oper_params, 5411 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 5412 bss_conf->he_bss_color.enabled = 5413 !le32_get_bits(elems->he_operation->he_oper_params, 5414 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 5415 5416 if (bss_conf->he_bss_color.enabled) 5417 *changed |= BSS_CHANGED_HE_BSS_COLOR; 5418 5419 bss_conf->htc_trig_based_pkt_ext = 5420 le32_get_bits(elems->he_operation->he_oper_params, 5421 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 5422 bss_conf->frame_time_rts_th = 5423 le32_get_bits(elems->he_operation->he_oper_params, 5424 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 5425 5426 bss_conf->uora_exists = !!elems->uora_element; 5427 if (elems->uora_element) 5428 bss_conf->uora_ocw_range = elems->uora_element[0]; 5429 5430 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 5431 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 5432 /* TODO: OPEN: what happens if BSS color disable is set? */ 5433 } 5434 5435 if (cbss->transmitted_bss) { 5436 bss_conf->nontransmitted = true; 5437 ether_addr_copy(bss_conf->transmitter_bssid, 5438 cbss->transmitted_bss->bssid); 5439 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 5440 bss_conf->bssid_index = cbss->bssid_index; 5441 } 5442 5443 /* 5444 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 5445 * in their association response, so ignore that data for our own 5446 * configuration. If it changed since the last beacon, we'll get the 5447 * next beacon and update then. 5448 */ 5449 5450 /* 5451 * If an operating mode notification IE is present, override the 5452 * NSS calculation (that would be done in rate_control_rate_init()) 5453 * and use the # of streams from that element. 5454 */ 5455 if (elems->opmode_notif && 5456 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 5457 u8 nss; 5458 5459 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 5460 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 5461 nss += 1; 5462 link_sta->pub->rx_nss = nss; 5463 } 5464 5465 /* 5466 * Always handle WMM once after association regardless 5467 * of the first value the AP uses. Setting -1 here has 5468 * that effect because the AP values is an unsigned 5469 * 4-bit value. 5470 */ 5471 link->u.mgd.wmm_last_param_set = -1; 5472 link->u.mgd.mu_edca_last_param_set = -1; 5473 5474 if (link->u.mgd.disable_wmm_tracking) { 5475 ieee80211_set_wmm_default(link, false, false); 5476 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 5477 elems->wmm_param_len, 5478 elems->mu_edca_param_set)) { 5479 /* still enable QoS since we might have HT/VHT */ 5480 ieee80211_set_wmm_default(link, false, true); 5481 /* disable WMM tracking in this case to disable 5482 * tracking WMM parameter changes in the beacon if 5483 * the parameters weren't actually valid. Doing so 5484 * avoids changing parameters very strangely when 5485 * the AP is going back and forth between valid and 5486 * invalid parameters. 5487 */ 5488 link->u.mgd.disable_wmm_tracking = true; 5489 } 5490 5491 if (elems->max_idle_period_ie) { 5492 bss_conf->max_idle_period = 5493 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 5494 bss_conf->protected_keep_alive = 5495 !!(elems->max_idle_period_ie->idle_options & 5496 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 5497 *changed |= BSS_CHANGED_KEEP_ALIVE; 5498 } else { 5499 bss_conf->max_idle_period = 0; 5500 bss_conf->protected_keep_alive = false; 5501 } 5502 5503 /* set assoc capability (AID was already set earlier), 5504 * ieee80211_set_associated() will tell the driver */ 5505 bss_conf->assoc_capability = capab_info; 5506 5507 ret = true; 5508 out: 5509 kfree(elems); 5510 kfree(bss_ies); 5511 return ret; 5512 } 5513 5514 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5515 struct sta_info *sta, 5516 struct link_sta_info *link_sta, 5517 struct cfg80211_bss *cbss) 5518 { 5519 struct ieee80211_sub_if_data *sdata = link->sdata; 5520 struct ieee80211_local *local = sdata->local; 5521 struct ieee80211_bss *bss = (void *)cbss->priv; 5522 u32 rates = 0, basic_rates = 0; 5523 bool have_higher_than_11mbit = false; 5524 int min_rate = INT_MAX, min_rate_index = -1; 5525 struct ieee80211_supported_band *sband; 5526 5527 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5528 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5529 5530 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5531 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5532 ieee80211_s1g_sta_rate_init(sta); 5533 return 0; 5534 } 5535 5536 sband = local->hw.wiphy->bands[cbss->channel->band]; 5537 5538 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5539 NULL, 0, 5540 &rates, &basic_rates, NULL, 5541 &have_higher_than_11mbit, 5542 &min_rate, &min_rate_index); 5543 5544 /* 5545 * This used to be a workaround for basic rates missing 5546 * in the association response frame. Now that we no 5547 * longer use the basic rates from there, it probably 5548 * doesn't happen any more, but keep the workaround so 5549 * in case some *other* APs are buggy in different ways 5550 * we can connect -- with a warning. 5551 * Allow this workaround only in case the AP provided at least 5552 * one rate. 5553 */ 5554 if (min_rate_index < 0) { 5555 link_info(link, "No legacy rates in association response\n"); 5556 return -EINVAL; 5557 } else if (!basic_rates) { 5558 link_info(link, "No basic rates, using min rate instead\n"); 5559 basic_rates = BIT(min_rate_index); 5560 } 5561 5562 if (rates) 5563 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5564 else 5565 link_info(link, "No rates found, keeping mandatory only\n"); 5566 5567 link->conf->basic_rates = basic_rates; 5568 5569 /* cf. IEEE 802.11 9.2.12 */ 5570 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5571 have_higher_than_11mbit; 5572 5573 return 0; 5574 } 5575 5576 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5577 struct cfg80211_bss *cbss) 5578 { 5579 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5580 const struct element *ht_cap_elem, *vht_cap_elem; 5581 const struct cfg80211_bss_ies *ies; 5582 const struct ieee80211_ht_cap *ht_cap; 5583 const struct ieee80211_vht_cap *vht_cap; 5584 const struct ieee80211_he_cap_elem *he_cap; 5585 const struct element *he_cap_elem; 5586 u16 mcs_80_map, mcs_160_map; 5587 int i, mcs_nss_size; 5588 bool support_160; 5589 u8 chains = 1; 5590 5591 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5592 return chains; 5593 5594 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5595 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5596 ht_cap = (void *)ht_cap_elem->data; 5597 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5598 /* 5599 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5600 * "Tx Unequal Modulation Supported" fields. 5601 */ 5602 } 5603 5604 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5605 return chains; 5606 5607 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5608 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5609 u8 nss; 5610 u16 tx_mcs_map; 5611 5612 vht_cap = (void *)vht_cap_elem->data; 5613 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5614 for (nss = 8; nss > 0; nss--) { 5615 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5616 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5617 break; 5618 } 5619 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5620 chains = max(chains, nss); 5621 } 5622 5623 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5624 return chains; 5625 5626 ies = rcu_dereference(cbss->ies); 5627 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5628 ies->data, ies->len); 5629 5630 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5631 return chains; 5632 5633 /* skip one byte ext_tag_id */ 5634 he_cap = (void *)(he_cap_elem->data + 1); 5635 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5636 5637 /* invalid HE IE */ 5638 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5639 return chains; 5640 5641 /* mcs_nss is right after he_cap info */ 5642 he_mcs_nss_supp = (void *)(he_cap + 1); 5643 5644 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5645 5646 for (i = 7; i >= 0; i--) { 5647 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5648 5649 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5650 chains = max_t(u8, chains, i + 1); 5651 break; 5652 } 5653 } 5654 5655 support_160 = he_cap->phy_cap_info[0] & 5656 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5657 5658 if (!support_160) 5659 return chains; 5660 5661 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5662 for (i = 7; i >= 0; i--) { 5663 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5664 5665 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5666 chains = max_t(u8, chains, i + 1); 5667 break; 5668 } 5669 } 5670 5671 return chains; 5672 } 5673 5674 static void 5675 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5676 struct ieee80211_supported_band *sband, 5677 struct cfg80211_assoc_request *req, 5678 bool wmm_used, int link_id, 5679 struct ieee80211_conn_settings *conn) 5680 { 5681 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5682 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5683 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5684 const struct ieee80211_sta_he_cap *he_cap; 5685 const struct ieee80211_sta_eht_cap *eht_cap; 5686 struct ieee80211_sta_vht_cap vht_cap; 5687 5688 if (sband->band == NL80211_BAND_S1GHZ) { 5689 conn->mode = IEEE80211_CONN_MODE_S1G; 5690 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5691 mlme_dbg(sdata, "operating as S1G STA\n"); 5692 return; 5693 } 5694 5695 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5696 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5697 5698 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5699 5700 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5701 mlme_link_id_dbg(sdata, link_id, 5702 "HT disabled by flag, limiting to legacy\n"); 5703 goto out; 5704 } 5705 5706 if (!wmm_used) { 5707 mlme_link_id_dbg(sdata, link_id, 5708 "WMM/QoS not supported, limiting to legacy\n"); 5709 goto out; 5710 } 5711 5712 if (req) { 5713 unsigned int i; 5714 5715 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5716 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5717 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5718 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5719 netdev_info(sdata->dev, 5720 "WEP/TKIP use, limiting to legacy\n"); 5721 goto out; 5722 } 5723 } 5724 } 5725 5726 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5727 mlme_link_id_dbg(sdata, link_id, 5728 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5729 goto out; 5730 } 5731 5732 /* HT is fine */ 5733 conn->mode = IEEE80211_CONN_MODE_HT; 5734 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5735 IEEE80211_CONN_BW_LIMIT_40 : 5736 IEEE80211_CONN_BW_LIMIT_20; 5737 5738 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5739 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5740 5741 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5742 mlme_link_id_dbg(sdata, link_id, 5743 "VHT disabled by flag, limiting to HT\n"); 5744 goto out; 5745 } 5746 5747 if (vht_cap.vht_supported && is_5ghz) { 5748 bool have_80mhz = false; 5749 unsigned int i; 5750 5751 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5752 mlme_link_id_dbg(sdata, link_id, 5753 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5754 goto out; 5755 } 5756 5757 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5758 for (i = 0; i < sband->n_channels; i++) { 5759 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5760 IEEE80211_CHAN_NO_80MHZ)) 5761 continue; 5762 5763 have_80mhz = true; 5764 break; 5765 } 5766 5767 if (!have_80mhz) { 5768 mlme_link_id_dbg(sdata, link_id, 5769 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5770 goto out; 5771 } 5772 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5773 mlme_link_id_dbg(sdata, link_id, 5774 "no VHT support on 5 GHz, limiting to HT\n"); 5775 goto out; 5776 } 5777 5778 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5779 if (sband->band != NL80211_BAND_2GHZ) { 5780 conn->mode = IEEE80211_CONN_MODE_VHT; 5781 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5782 } 5783 5784 if (is_5ghz && 5785 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5786 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5787 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5788 mlme_link_id_dbg(sdata, link_id, 5789 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5790 } 5791 5792 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5793 mlme_link_id_dbg(sdata, link_id, 5794 "HE disabled by flag, limiting to HT/VHT\n"); 5795 goto out; 5796 } 5797 5798 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5799 if (!he_cap) { 5800 WARN_ON(is_6ghz); 5801 mlme_link_id_dbg(sdata, link_id, 5802 "no HE support, limiting to HT/VHT\n"); 5803 goto out; 5804 } 5805 5806 /* so we have HE */ 5807 conn->mode = IEEE80211_CONN_MODE_HE; 5808 5809 /* check bandwidth */ 5810 switch (sband->band) { 5811 default: 5812 case NL80211_BAND_2GHZ: 5813 if (he_cap->he_cap_elem.phy_cap_info[0] & 5814 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5815 break; 5816 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5817 mlme_link_id_dbg(sdata, link_id, 5818 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5819 break; 5820 case NL80211_BAND_5GHZ: 5821 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5822 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5823 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5824 mlme_link_id_dbg(sdata, link_id, 5825 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5826 break; 5827 } 5828 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5829 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5830 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5831 conn->bw_limit, 5832 IEEE80211_CONN_BW_LIMIT_80); 5833 mlme_link_id_dbg(sdata, link_id, 5834 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5835 } 5836 break; 5837 case NL80211_BAND_6GHZ: 5838 if (he_cap->he_cap_elem.phy_cap_info[0] & 5839 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5840 break; 5841 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5842 conn->bw_limit, 5843 IEEE80211_CONN_BW_LIMIT_80); 5844 mlme_link_id_dbg(sdata, link_id, 5845 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5846 break; 5847 } 5848 5849 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5850 mlme_link_id_dbg(sdata, link_id, 5851 "EHT disabled by flag, limiting to HE\n"); 5852 goto out; 5853 } 5854 5855 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5856 if (!eht_cap) { 5857 mlme_link_id_dbg(sdata, link_id, 5858 "no EHT support, limiting to HE\n"); 5859 goto out; 5860 } 5861 5862 /* we have EHT */ 5863 5864 conn->mode = IEEE80211_CONN_MODE_EHT; 5865 5866 /* check bandwidth */ 5867 if (is_6ghz && 5868 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5869 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5870 else if (is_6ghz) 5871 mlme_link_id_dbg(sdata, link_id, 5872 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5873 5874 out: 5875 mlme_link_id_dbg(sdata, link_id, 5876 "determined local STA to be %s, BW limited to %d MHz\n", 5877 ieee80211_conn_mode_str(conn->mode), 5878 20 * (1 << conn->bw_limit)); 5879 } 5880 5881 static void 5882 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5883 struct ieee80211_supported_band *sband, 5884 struct cfg80211_auth_request *req, 5885 bool wmm_used, 5886 struct ieee80211_conn_settings *conn) 5887 { 5888 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5889 req->link_id > 0 ? req->link_id : 0, 5890 conn); 5891 } 5892 5893 static void 5894 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5895 struct ieee80211_supported_band *sband, 5896 struct cfg80211_assoc_request *req, 5897 bool wmm_used, int link_id, 5898 struct ieee80211_conn_settings *conn) 5899 { 5900 struct ieee80211_conn_settings tmp; 5901 5902 WARN_ON(!req); 5903 5904 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5905 &tmp); 5906 5907 conn->mode = min_t(enum ieee80211_conn_mode, 5908 conn->mode, tmp.mode); 5909 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5910 conn->bw_limit, tmp.bw_limit); 5911 } 5912 5913 static enum ieee80211_ap_reg_power 5914 ieee80211_ap_power_type(u8 control) 5915 { 5916 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5917 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5918 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5919 return IEEE80211_REG_LPI_AP; 5920 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5921 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5922 return IEEE80211_REG_SP_AP; 5923 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5924 return IEEE80211_REG_VLP_AP; 5925 default: 5926 return IEEE80211_REG_UNSET_AP; 5927 } 5928 } 5929 5930 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5931 struct ieee80211_link_data *link, 5932 int link_id, 5933 struct cfg80211_bss *cbss, bool mlo, 5934 struct ieee80211_conn_settings *conn, 5935 unsigned long *userspace_selectors) 5936 { 5937 struct ieee80211_local *local = sdata->local; 5938 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5939 struct ieee80211_chan_req chanreq = {}; 5940 struct cfg80211_chan_def ap_chandef; 5941 struct ieee802_11_elems *elems; 5942 int ret; 5943 5944 lockdep_assert_wiphy(local->hw.wiphy); 5945 5946 rcu_read_lock(); 5947 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5948 &chanreq, &ap_chandef, 5949 userspace_selectors); 5950 5951 if (IS_ERR(elems)) { 5952 rcu_read_unlock(); 5953 return PTR_ERR(elems); 5954 } 5955 5956 if (mlo && !elems->ml_basic) { 5957 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5958 rcu_read_unlock(); 5959 kfree(elems); 5960 return -EINVAL; 5961 } 5962 5963 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5964 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5965 5966 if (elems->pwr_constr_elem) 5967 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5968 5969 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5970 if (he_6ghz_oper) 5971 link->conf->power_type = 5972 ieee80211_ap_power_type(he_6ghz_oper->control); 5973 else 5974 link_info(link, 5975 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5976 cbss->channel->center_freq); 5977 5978 link->conf->tpe = elems->tpe; 5979 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5980 &chanreq.oper); 5981 } 5982 rcu_read_unlock(); 5983 /* the element data was RCU protected so no longer valid anyway */ 5984 kfree(elems); 5985 elems = NULL; 5986 5987 if (!link) 5988 return 0; 5989 5990 rcu_read_lock(); 5991 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5992 local->rx_chains); 5993 rcu_read_unlock(); 5994 5995 /* 5996 * If this fails (possibly due to channel context sharing 5997 * on incompatible channels, e.g. 80+80 and 160 sharing the 5998 * same control channel) try to use a smaller bandwidth. 5999 */ 6000 ret = ieee80211_link_use_channel(link, &chanreq, 6001 IEEE80211_CHANCTX_SHARED); 6002 6003 /* don't downgrade for 5 and 10 MHz channels, though. */ 6004 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 6005 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 6006 return ret; 6007 6008 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 6009 ieee80211_chanreq_downgrade(&chanreq, conn); 6010 6011 ret = ieee80211_link_use_channel(link, &chanreq, 6012 IEEE80211_CHANCTX_SHARED); 6013 } 6014 6015 return ret; 6016 } 6017 6018 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 6019 u8 *dtim_count, u8 *dtim_period) 6020 { 6021 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 6022 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 6023 ies->len); 6024 const struct ieee80211_tim_ie *tim = NULL; 6025 const struct ieee80211_bssid_index *idx; 6026 bool valid = tim_ie && tim_ie[1] >= 2; 6027 6028 if (valid) 6029 tim = (void *)(tim_ie + 2); 6030 6031 if (dtim_count) 6032 *dtim_count = valid ? tim->dtim_count : 0; 6033 6034 if (dtim_period) 6035 *dtim_period = valid ? tim->dtim_period : 0; 6036 6037 /* Check if value is overridden by non-transmitted profile */ 6038 if (!idx_ie || idx_ie[1] < 3) 6039 return valid; 6040 6041 idx = (void *)(idx_ie + 2); 6042 6043 if (dtim_count) 6044 *dtim_count = idx->dtim_count; 6045 6046 if (dtim_period) 6047 *dtim_period = idx->dtim_period; 6048 6049 return true; 6050 } 6051 6052 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 6053 struct ieee80211_mgmt *mgmt, 6054 struct ieee802_11_elems *elems, 6055 const u8 *elem_start, unsigned int elem_len) 6056 { 6057 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6058 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6059 struct ieee80211_local *local = sdata->local; 6060 unsigned int link_id; 6061 struct sta_info *sta; 6062 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6063 u16 valid_links = 0, dormant_links = 0; 6064 int err; 6065 6066 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6067 /* 6068 * station info was already allocated and inserted before 6069 * the association and should be available to us 6070 */ 6071 sta = sta_info_get(sdata, assoc_data->ap_addr); 6072 if (WARN_ON(!sta)) 6073 goto out_err; 6074 6075 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 6076 6077 if (ieee80211_vif_is_mld(&sdata->vif)) { 6078 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6079 if (!assoc_data->link[link_id].bss) 6080 continue; 6081 6082 valid_links |= BIT(link_id); 6083 if (assoc_data->link[link_id].disabled) 6084 dormant_links |= BIT(link_id); 6085 6086 if (link_id != assoc_data->assoc_link_id) { 6087 err = ieee80211_sta_allocate_link(sta, link_id); 6088 if (err) 6089 goto out_err; 6090 } 6091 } 6092 6093 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6094 } 6095 6096 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6097 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 6098 struct ieee80211_link_data *link; 6099 struct link_sta_info *link_sta; 6100 6101 if (!cbss) 6102 continue; 6103 6104 link = sdata_dereference(sdata->link[link_id], sdata); 6105 if (WARN_ON(!link)) 6106 goto out_err; 6107 6108 if (ieee80211_vif_is_mld(&sdata->vif)) 6109 link_info(link, 6110 "local address %pM, AP link address %pM%s\n", 6111 link->conf->addr, 6112 assoc_data->link[link_id].bss->bssid, 6113 link_id == assoc_data->assoc_link_id ? 6114 " (assoc)" : ""); 6115 6116 link_sta = rcu_dereference_protected(sta->link[link_id], 6117 lockdep_is_held(&local->hw.wiphy->mtx)); 6118 if (WARN_ON(!link_sta)) 6119 goto out_err; 6120 6121 if (!link->u.mgd.have_beacon) { 6122 const struct cfg80211_bss_ies *ies; 6123 6124 rcu_read_lock(); 6125 ies = rcu_dereference(cbss->beacon_ies); 6126 if (ies) 6127 link->u.mgd.have_beacon = true; 6128 else 6129 ies = rcu_dereference(cbss->ies); 6130 ieee80211_get_dtim(ies, 6131 &link->conf->sync_dtim_count, 6132 &link->u.mgd.dtim_period); 6133 link->conf->beacon_int = cbss->beacon_interval; 6134 rcu_read_unlock(); 6135 } 6136 6137 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 6138 6139 if (link_id != assoc_data->assoc_link_id) { 6140 link->u.mgd.conn = assoc_data->link[link_id].conn; 6141 6142 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 6143 true, &link->u.mgd.conn, 6144 sdata->u.mgd.userspace_selectors); 6145 if (err) { 6146 link_info(link, "prep_channel failed\n"); 6147 goto out_err; 6148 } 6149 } 6150 6151 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 6152 assoc_data->link[link_id].bss); 6153 if (err) 6154 goto out_err; 6155 6156 if (!ieee80211_assoc_config_link(link, link_sta, 6157 assoc_data->link[link_id].bss, 6158 mgmt, elem_start, elem_len, 6159 &changed[link_id])) 6160 goto out_err; 6161 6162 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 6163 valid_links &= ~BIT(link_id); 6164 ieee80211_sta_remove_link(sta, link_id); 6165 continue; 6166 } 6167 6168 if (link_id != assoc_data->assoc_link_id) { 6169 err = ieee80211_sta_activate_link(sta, link_id); 6170 if (err) 6171 goto out_err; 6172 } 6173 } 6174 6175 /* links might have changed due to rejected ones, set them again */ 6176 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 6177 6178 rate_control_rate_init_all_links(sta); 6179 6180 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 6181 set_sta_flag(sta, WLAN_STA_MFP); 6182 sta->sta.mfp = true; 6183 } else { 6184 sta->sta.mfp = false; 6185 } 6186 6187 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 6188 elems->ext_capab_len); 6189 6190 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 6191 local->hw.queues >= IEEE80211_NUM_ACS; 6192 6193 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 6194 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 6195 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 6196 if (err) { 6197 sdata_info(sdata, 6198 "failed to move station %pM to desired state\n", 6199 sta->sta.addr); 6200 WARN_ON(__sta_info_destroy(sta)); 6201 goto out_err; 6202 } 6203 6204 if (sdata->wdev.use_4addr) 6205 drv_sta_set_4addr(local, sdata, &sta->sta, true); 6206 6207 ieee80211_set_associated(sdata, assoc_data, changed); 6208 6209 /* 6210 * If we're using 4-addr mode, let the AP know that we're 6211 * doing so, so that it can create the STA VLAN on its side 6212 */ 6213 if (ifmgd->use_4addr) 6214 ieee80211_send_4addr_nullfunc(local, sdata); 6215 6216 /* 6217 * Start timer to probe the connection to the AP now. 6218 * Also start the timer that will detect beacon loss. 6219 */ 6220 ieee80211_sta_reset_beacon_monitor(sdata); 6221 ieee80211_sta_reset_conn_monitor(sdata); 6222 6223 return true; 6224 out_err: 6225 eth_zero_addr(sdata->vif.cfg.ap_addr); 6226 return false; 6227 } 6228 6229 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 6230 struct ieee80211_mgmt *mgmt, 6231 size_t len) 6232 { 6233 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6234 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 6235 u16 capab_info, status_code, aid; 6236 struct ieee80211_elems_parse_params parse_params = { 6237 .bss = NULL, 6238 .link_id = -1, 6239 .from_ap = true, 6240 }; 6241 struct ieee802_11_elems *elems; 6242 int ac; 6243 const u8 *elem_start; 6244 unsigned int elem_len; 6245 bool reassoc; 6246 struct ieee80211_event event = { 6247 .type = MLME_EVENT, 6248 .u.mlme.data = ASSOC_EVENT, 6249 }; 6250 struct ieee80211_prep_tx_info info = {}; 6251 struct cfg80211_rx_assoc_resp_data resp = { 6252 .uapsd_queues = -1, 6253 }; 6254 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 6255 unsigned int link_id; 6256 6257 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6258 6259 if (!assoc_data) 6260 return; 6261 6262 info.link_id = assoc_data->assoc_link_id; 6263 6264 parse_params.mode = 6265 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 6266 6267 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 6268 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 6269 return; 6270 6271 /* 6272 * AssocResp and ReassocResp have identical structure, so process both 6273 * of them in this function. 6274 */ 6275 6276 if (len < 24 + 6) 6277 return; 6278 6279 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 6280 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 6281 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 6282 if (assoc_data->s1g) 6283 elem_start = mgmt->u.s1g_assoc_resp.variable; 6284 else 6285 elem_start = mgmt->u.assoc_resp.variable; 6286 6287 /* 6288 * Note: this may not be perfect, AP might misbehave - if 6289 * anyone needs to rely on perfect complete notification 6290 * with the exact right subtype, then we need to track what 6291 * we actually transmitted. 6292 */ 6293 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 6294 IEEE80211_STYPE_ASSOC_REQ; 6295 6296 if (assoc_data->fils_kek_len && 6297 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 6298 return; 6299 6300 elem_len = len - (elem_start - (u8 *)mgmt); 6301 parse_params.start = elem_start; 6302 parse_params.len = elem_len; 6303 elems = ieee802_11_parse_elems_full(&parse_params); 6304 if (!elems) 6305 goto notify_driver; 6306 6307 if (elems->aid_resp) 6308 aid = le16_to_cpu(elems->aid_resp->aid); 6309 else if (assoc_data->s1g) 6310 aid = 0; /* TODO */ 6311 else 6312 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 6313 6314 /* 6315 * The 5 MSB of the AID field are reserved 6316 * (802.11-2016 9.4.1.8 AID field) 6317 */ 6318 aid &= 0x7ff; 6319 6320 sdata_info(sdata, 6321 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 6322 reassoc ? "Rea" : "A", assoc_data->ap_addr, 6323 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 6324 6325 ifmgd->broken_ap = false; 6326 6327 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 6328 elems->timeout_int && 6329 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 6330 u32 tu, ms; 6331 6332 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 6333 le32_to_cpu(elems->timeout_int->value)); 6334 6335 tu = le32_to_cpu(elems->timeout_int->value); 6336 ms = tu * 1024 / 1000; 6337 sdata_info(sdata, 6338 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 6339 assoc_data->ap_addr, tu, ms); 6340 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 6341 assoc_data->timeout_started = true; 6342 assoc_data->comeback = true; 6343 if (ms > IEEE80211_ASSOC_TIMEOUT) 6344 run_again(sdata, assoc_data->timeout); 6345 goto notify_driver; 6346 } 6347 6348 if (status_code != WLAN_STATUS_SUCCESS) { 6349 sdata_info(sdata, "%pM denied association (code=%d)\n", 6350 assoc_data->ap_addr, status_code); 6351 event.u.mlme.status = MLME_DENIED; 6352 event.u.mlme.reason = status_code; 6353 drv_event_callback(sdata->local, sdata, &event); 6354 } else { 6355 if (aid == 0 || aid > IEEE80211_MAX_AID) { 6356 sdata_info(sdata, 6357 "invalid AID value %d (out of range), turn off PS\n", 6358 aid); 6359 aid = 0; 6360 ifmgd->broken_ap = true; 6361 } 6362 6363 if (ieee80211_vif_is_mld(&sdata->vif)) { 6364 struct ieee80211_mle_basic_common_info *common; 6365 6366 if (!elems->ml_basic) { 6367 sdata_info(sdata, 6368 "MLO association with %pM but no (basic) multi-link element in response!\n", 6369 assoc_data->ap_addr); 6370 goto abandon_assoc; 6371 } 6372 6373 common = (void *)elems->ml_basic->variable; 6374 6375 if (memcmp(assoc_data->ap_addr, 6376 common->mld_mac_addr, ETH_ALEN)) { 6377 sdata_info(sdata, 6378 "AP MLD MAC address mismatch: got %pM expected %pM\n", 6379 common->mld_mac_addr, 6380 assoc_data->ap_addr); 6381 goto abandon_assoc; 6382 } 6383 6384 sdata->vif.cfg.eml_cap = 6385 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 6386 sdata->vif.cfg.eml_med_sync_delay = 6387 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 6388 sdata->vif.cfg.mld_capa_op = 6389 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 6390 } 6391 6392 sdata->vif.cfg.aid = aid; 6393 6394 if (!ieee80211_assoc_success(sdata, mgmt, elems, 6395 elem_start, elem_len)) { 6396 /* oops -- internal error -- send timeout for now */ 6397 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 6398 goto notify_driver; 6399 } 6400 event.u.mlme.status = MLME_SUCCESS; 6401 drv_event_callback(sdata->local, sdata, &event); 6402 sdata_info(sdata, "associated\n"); 6403 6404 info.success = 1; 6405 } 6406 6407 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6408 struct ieee80211_link_data *link; 6409 6410 if (!assoc_data->link[link_id].bss) 6411 continue; 6412 6413 resp.links[link_id].bss = assoc_data->link[link_id].bss; 6414 ether_addr_copy(resp.links[link_id].addr, 6415 assoc_data->link[link_id].addr); 6416 resp.links[link_id].status = assoc_data->link[link_id].status; 6417 6418 link = sdata_dereference(sdata->link[link_id], sdata); 6419 if (!link) 6420 continue; 6421 6422 /* get uapsd queues configuration - same for all links */ 6423 resp.uapsd_queues = 0; 6424 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 6425 if (link->tx_conf[ac].uapsd) 6426 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 6427 } 6428 6429 if (ieee80211_vif_is_mld(&sdata->vif)) { 6430 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 6431 resp.ap_mld_addr = ap_mld_addr; 6432 } 6433 6434 ieee80211_destroy_assoc_data(sdata, 6435 status_code == WLAN_STATUS_SUCCESS ? 6436 ASSOC_SUCCESS : 6437 ASSOC_REJECTED); 6438 6439 resp.buf = (u8 *)mgmt; 6440 resp.len = len; 6441 resp.req_ies = ifmgd->assoc_req_ies; 6442 resp.req_ies_len = ifmgd->assoc_req_ies_len; 6443 cfg80211_rx_assoc_resp(sdata->dev, &resp); 6444 notify_driver: 6445 drv_mgd_complete_tx(sdata->local, sdata, &info); 6446 kfree(elems); 6447 return; 6448 abandon_assoc: 6449 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 6450 goto notify_driver; 6451 } 6452 6453 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 6454 struct ieee80211_mgmt *mgmt, size_t len, 6455 struct ieee80211_rx_status *rx_status) 6456 { 6457 struct ieee80211_sub_if_data *sdata = link->sdata; 6458 struct ieee80211_local *local = sdata->local; 6459 struct ieee80211_bss *bss; 6460 struct ieee80211_channel *channel; 6461 6462 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6463 6464 channel = ieee80211_get_channel_khz(local->hw.wiphy, 6465 ieee80211_rx_status_to_khz(rx_status)); 6466 if (!channel) 6467 return; 6468 6469 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 6470 if (bss) { 6471 link->conf->beacon_rate = bss->beacon_rate; 6472 ieee80211_rx_bss_put(local, bss); 6473 } 6474 } 6475 6476 6477 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 6478 struct sk_buff *skb) 6479 { 6480 struct ieee80211_sub_if_data *sdata = link->sdata; 6481 struct ieee80211_mgmt *mgmt = (void *)skb->data; 6482 struct ieee80211_if_managed *ifmgd; 6483 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 6484 struct ieee80211_channel *channel; 6485 size_t baselen, len = skb->len; 6486 6487 ifmgd = &sdata->u.mgd; 6488 6489 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6490 6491 /* 6492 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 6493 * "If a 6 GHz AP receives a Probe Request frame and responds with 6494 * a Probe Response frame [..], the Address 1 field of the Probe 6495 * Response frame shall be set to the broadcast address [..]" 6496 * So, on 6GHz band we should also accept broadcast responses. 6497 */ 6498 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 6499 rx_status->freq); 6500 if (!channel) 6501 return; 6502 6503 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 6504 (channel->band != NL80211_BAND_6GHZ || 6505 !is_broadcast_ether_addr(mgmt->da))) 6506 return; /* ignore ProbeResp to foreign address */ 6507 6508 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6509 if (baselen > len) 6510 return; 6511 6512 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6513 6514 if (ifmgd->associated && 6515 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6516 ieee80211_reset_ap_probe(sdata); 6517 } 6518 6519 /* 6520 * This is the canonical list of information elements we care about, 6521 * the filter code also gives us all changes to the Microsoft OUI 6522 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6523 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6524 * changes to requested client power. 6525 * 6526 * We implement beacon filtering in software since that means we can 6527 * avoid processing the frame here and in cfg80211, and userspace 6528 * will not be able to tell whether the hardware supports it or not. 6529 * 6530 * XXX: This list needs to be dynamic -- userspace needs to be able to 6531 * add items it requires. It also needs to be able to tell us to 6532 * look out for other vendor IEs. 6533 */ 6534 static const u64 care_about_ies = 6535 (1ULL << WLAN_EID_COUNTRY) | 6536 (1ULL << WLAN_EID_ERP_INFO) | 6537 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6538 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6539 (1ULL << WLAN_EID_HT_CAPABILITY) | 6540 (1ULL << WLAN_EID_HT_OPERATION) | 6541 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6542 6543 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6544 struct ieee80211_if_managed *ifmgd, 6545 struct ieee80211_bss_conf *bss_conf, 6546 struct ieee80211_local *local, 6547 struct ieee80211_rx_status *rx_status) 6548 { 6549 struct ieee80211_sub_if_data *sdata = link->sdata; 6550 6551 /* Track average RSSI from the Beacon frames of the current AP */ 6552 6553 if (!link->u.mgd.tracking_signal_avg) { 6554 link->u.mgd.tracking_signal_avg = true; 6555 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6556 link->u.mgd.last_cqm_event_signal = 0; 6557 link->u.mgd.count_beacon_signal = 1; 6558 link->u.mgd.last_ave_beacon_signal = 0; 6559 } else { 6560 link->u.mgd.count_beacon_signal++; 6561 } 6562 6563 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6564 -rx_status->signal); 6565 6566 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6567 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6568 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6569 int last_sig = link->u.mgd.last_ave_beacon_signal; 6570 struct ieee80211_event event = { 6571 .type = RSSI_EVENT, 6572 }; 6573 6574 /* 6575 * if signal crosses either of the boundaries, invoke callback 6576 * with appropriate parameters 6577 */ 6578 if (sig > ifmgd->rssi_max_thold && 6579 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6580 link->u.mgd.last_ave_beacon_signal = sig; 6581 event.u.rssi.data = RSSI_EVENT_HIGH; 6582 drv_event_callback(local, sdata, &event); 6583 } else if (sig < ifmgd->rssi_min_thold && 6584 (last_sig >= ifmgd->rssi_max_thold || 6585 last_sig == 0)) { 6586 link->u.mgd.last_ave_beacon_signal = sig; 6587 event.u.rssi.data = RSSI_EVENT_LOW; 6588 drv_event_callback(local, sdata, &event); 6589 } 6590 } 6591 6592 if (bss_conf->cqm_rssi_thold && 6593 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6594 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6595 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6596 int last_event = link->u.mgd.last_cqm_event_signal; 6597 int thold = bss_conf->cqm_rssi_thold; 6598 int hyst = bss_conf->cqm_rssi_hyst; 6599 6600 if (sig < thold && 6601 (last_event == 0 || sig < last_event - hyst)) { 6602 link->u.mgd.last_cqm_event_signal = sig; 6603 ieee80211_cqm_rssi_notify( 6604 &sdata->vif, 6605 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6606 sig, GFP_KERNEL); 6607 } else if (sig > thold && 6608 (last_event == 0 || sig > last_event + hyst)) { 6609 link->u.mgd.last_cqm_event_signal = sig; 6610 ieee80211_cqm_rssi_notify( 6611 &sdata->vif, 6612 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6613 sig, GFP_KERNEL); 6614 } 6615 } 6616 6617 if (bss_conf->cqm_rssi_low && 6618 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6619 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6620 int last_event = link->u.mgd.last_cqm_event_signal; 6621 int low = bss_conf->cqm_rssi_low; 6622 int high = bss_conf->cqm_rssi_high; 6623 6624 if (sig < low && 6625 (last_event == 0 || last_event >= low)) { 6626 link->u.mgd.last_cqm_event_signal = sig; 6627 ieee80211_cqm_rssi_notify( 6628 &sdata->vif, 6629 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6630 sig, GFP_KERNEL); 6631 } else if (sig > high && 6632 (last_event == 0 || last_event <= high)) { 6633 link->u.mgd.last_cqm_event_signal = sig; 6634 ieee80211_cqm_rssi_notify( 6635 &sdata->vif, 6636 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6637 sig, GFP_KERNEL); 6638 } 6639 } 6640 } 6641 6642 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6643 struct cfg80211_bss *bss) 6644 { 6645 if (ether_addr_equal(tx_bssid, bss->bssid)) 6646 return true; 6647 if (!bss->transmitted_bss) 6648 return false; 6649 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6650 } 6651 6652 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6653 struct wiphy_work *work) 6654 { 6655 struct ieee80211_sub_if_data *sdata = 6656 container_of(work, struct ieee80211_sub_if_data, 6657 u.mgd.ml_reconf_work.work); 6658 u16 new_valid_links, new_active_links, new_dormant_links; 6659 int ret; 6660 6661 if (!sdata->u.mgd.removed_links) 6662 return; 6663 6664 sdata_info(sdata, 6665 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6666 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6667 6668 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6669 if (new_valid_links == sdata->vif.valid_links) 6670 return; 6671 6672 if (!new_valid_links || 6673 !(new_valid_links & ~sdata->vif.dormant_links)) { 6674 sdata_info(sdata, "No valid links after reconfiguration\n"); 6675 ret = -EINVAL; 6676 goto out; 6677 } 6678 6679 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6680 if (new_active_links != sdata->vif.active_links) { 6681 if (!new_active_links) 6682 new_active_links = 6683 BIT(ffs(new_valid_links & 6684 ~sdata->vif.dormant_links) - 1); 6685 6686 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6687 if (ret) { 6688 sdata_info(sdata, 6689 "Failed setting active links\n"); 6690 goto out; 6691 } 6692 } 6693 6694 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6695 6696 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6697 new_dormant_links); 6698 if (ret) 6699 sdata_info(sdata, "Failed setting valid links\n"); 6700 6701 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6702 6703 out: 6704 if (!ret) 6705 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6706 else 6707 __ieee80211_disconnect(sdata); 6708 6709 sdata->u.mgd.removed_links = 0; 6710 } 6711 6712 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6713 struct ieee802_11_elems *elems) 6714 { 6715 const struct element *sub; 6716 unsigned long removed_links = 0; 6717 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6718 u8 link_id; 6719 u32 delay; 6720 6721 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6722 return; 6723 6724 /* Directly parse the sub elements as the common information doesn't 6725 * hold any useful information. 6726 */ 6727 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6728 elems->ml_reconf_len) { 6729 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6730 u8 *pos = prof->variable; 6731 u16 control; 6732 6733 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6734 continue; 6735 6736 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6737 sub->datalen)) 6738 return; 6739 6740 control = le16_to_cpu(prof->control); 6741 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6742 6743 removed_links |= BIT(link_id); 6744 6745 /* the MAC address should not be included, but handle it */ 6746 if (control & 6747 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6748 pos += 6; 6749 6750 /* According to Draft P802.11be_D3.0, the control should 6751 * include the AP Removal Timer present. If the AP Removal Timer 6752 * is not present assume immediate removal. 6753 */ 6754 if (control & 6755 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6756 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6757 } 6758 6759 removed_links &= sdata->vif.valid_links; 6760 if (!removed_links) { 6761 /* In case the removal was cancelled, abort it */ 6762 if (sdata->u.mgd.removed_links) { 6763 sdata->u.mgd.removed_links = 0; 6764 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6765 &sdata->u.mgd.ml_reconf_work); 6766 } 6767 return; 6768 } 6769 6770 delay = 0; 6771 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6772 struct ieee80211_bss_conf *link_conf = 6773 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6774 u32 link_delay; 6775 6776 if (!link_conf) { 6777 removed_links &= ~BIT(link_id); 6778 continue; 6779 } 6780 6781 if (link_removal_timeout[link_id] < 1) 6782 link_delay = 0; 6783 else 6784 link_delay = link_conf->beacon_int * 6785 (link_removal_timeout[link_id] - 1); 6786 6787 if (!delay) 6788 delay = link_delay; 6789 else 6790 delay = min(delay, link_delay); 6791 } 6792 6793 sdata->u.mgd.removed_links = removed_links; 6794 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6795 &sdata->u.mgd.ml_reconf_work, 6796 TU_TO_JIFFIES(delay)); 6797 } 6798 6799 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6800 u16 active_links, u16 dormant_links, 6801 u16 suspended_links) 6802 { 6803 u64 changed = 0; 6804 int ret; 6805 6806 if (!active_links) { 6807 ret = -EINVAL; 6808 goto out; 6809 } 6810 6811 /* If there is an active negotiated TTLM, it should be discarded by 6812 * the new negotiated/advertised TTLM. 6813 */ 6814 if (sdata->vif.neg_ttlm.valid) { 6815 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6816 sdata->vif.suspended_links = 0; 6817 changed = BSS_CHANGED_MLD_TTLM; 6818 } 6819 6820 if (sdata->vif.active_links != active_links) { 6821 /* usable links are affected when active_links are changed, 6822 * so notify the driver about the status change 6823 */ 6824 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6825 active_links &= sdata->vif.active_links; 6826 if (!active_links) 6827 active_links = 6828 BIT(__ffs(sdata->vif.valid_links & 6829 ~dormant_links)); 6830 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6831 if (ret) { 6832 sdata_info(sdata, "Failed to set TTLM active links\n"); 6833 goto out; 6834 } 6835 } 6836 6837 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6838 dormant_links); 6839 if (ret) { 6840 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6841 goto out; 6842 } 6843 6844 sdata->vif.suspended_links = suspended_links; 6845 if (sdata->vif.suspended_links) 6846 changed |= BSS_CHANGED_MLD_TTLM; 6847 6848 ieee80211_vif_cfg_change_notify(sdata, changed); 6849 6850 out: 6851 if (ret) 6852 ieee80211_disconnect(&sdata->vif, false); 6853 6854 return ret; 6855 } 6856 6857 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6858 struct wiphy_work *work) 6859 { 6860 u16 new_active_links, new_dormant_links; 6861 struct ieee80211_sub_if_data *sdata = 6862 container_of(work, struct ieee80211_sub_if_data, 6863 u.mgd.ttlm_work.work); 6864 6865 new_active_links = sdata->u.mgd.ttlm_info.map & 6866 sdata->vif.valid_links; 6867 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6868 sdata->vif.valid_links; 6869 6870 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6871 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6872 0)) 6873 return; 6874 6875 sdata->u.mgd.ttlm_info.active = true; 6876 sdata->u.mgd.ttlm_info.switch_time = 0; 6877 } 6878 6879 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6880 { 6881 if (bm_size == 1) 6882 return *data; 6883 else 6884 return get_unaligned_le16(data); 6885 } 6886 6887 static int 6888 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6889 const struct ieee80211_ttlm_elem *ttlm, 6890 struct ieee80211_adv_ttlm_info *ttlm_info) 6891 { 6892 /* The element size was already validated in 6893 * ieee80211_tid_to_link_map_size_ok() 6894 */ 6895 u8 control, link_map_presence, map_size, tid; 6896 u8 *pos; 6897 6898 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6899 pos = (void *)ttlm->optional; 6900 control = ttlm->control; 6901 6902 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6903 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6904 return 0; 6905 6906 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6907 IEEE80211_TTLM_DIRECTION_BOTH) { 6908 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6909 return -EINVAL; 6910 } 6911 6912 link_map_presence = *pos; 6913 pos++; 6914 6915 ttlm_info->switch_time = get_unaligned_le16(pos); 6916 6917 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6918 * by 1. 6919 */ 6920 if (!ttlm_info->switch_time) 6921 ttlm_info->switch_time = 1; 6922 6923 pos += 2; 6924 6925 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6926 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6927 pos += 3; 6928 } 6929 6930 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6931 map_size = 1; 6932 else 6933 map_size = 2; 6934 6935 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6936 * not advertise a TID-to-link mapping that does not map all TIDs to the 6937 * same link set, reject frame if not all links have mapping 6938 */ 6939 if (link_map_presence != 0xff) { 6940 sdata_info(sdata, 6941 "Invalid advertised T2L mapping presence indicator\n"); 6942 return -EINVAL; 6943 } 6944 6945 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6946 if (!ttlm_info->map) { 6947 sdata_info(sdata, 6948 "Invalid advertised T2L map for TID 0\n"); 6949 return -EINVAL; 6950 } 6951 6952 pos += map_size; 6953 6954 for (tid = 1; tid < 8; tid++) { 6955 u16 map = ieee80211_get_ttlm(map_size, pos); 6956 6957 if (map != ttlm_info->map) { 6958 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6959 tid); 6960 return -EINVAL; 6961 } 6962 6963 pos += map_size; 6964 } 6965 return 0; 6966 } 6967 6968 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6969 struct ieee802_11_elems *elems, 6970 u64 beacon_ts) 6971 { 6972 u8 i; 6973 int ret; 6974 6975 if (!ieee80211_vif_is_mld(&sdata->vif)) 6976 return; 6977 6978 if (!elems->ttlm_num) { 6979 if (sdata->u.mgd.ttlm_info.switch_time) { 6980 /* if a planned TID-to-link mapping was cancelled - 6981 * abort it 6982 */ 6983 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6984 &sdata->u.mgd.ttlm_work); 6985 } else if (sdata->u.mgd.ttlm_info.active) { 6986 /* if no TID-to-link element, set to default mapping in 6987 * which all TIDs are mapped to all setup links 6988 */ 6989 ret = ieee80211_vif_set_links(sdata, 6990 sdata->vif.valid_links, 6991 0); 6992 if (ret) { 6993 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6994 return; 6995 } 6996 ieee80211_vif_cfg_change_notify(sdata, 6997 BSS_CHANGED_MLD_VALID_LINKS); 6998 } 6999 memset(&sdata->u.mgd.ttlm_info, 0, 7000 sizeof(sdata->u.mgd.ttlm_info)); 7001 return; 7002 } 7003 7004 for (i = 0; i < elems->ttlm_num; i++) { 7005 struct ieee80211_adv_ttlm_info ttlm_info; 7006 u32 res; 7007 7008 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 7009 &ttlm_info); 7010 7011 if (res) { 7012 __ieee80211_disconnect(sdata); 7013 return; 7014 } 7015 7016 if (ttlm_info.switch_time) { 7017 u16 beacon_ts_tu, st_tu, delay; 7018 u32 delay_jiffies; 7019 u64 mask; 7020 7021 /* The t2l map switch time is indicated with a partial 7022 * TSF value (bits 10 to 25), get the partial beacon TS 7023 * as well, and calc the delay to the start time. 7024 */ 7025 mask = GENMASK_ULL(25, 10); 7026 beacon_ts_tu = (beacon_ts & mask) >> 10; 7027 st_tu = ttlm_info.switch_time; 7028 delay = st_tu - beacon_ts_tu; 7029 7030 /* 7031 * If the switch time is far in the future, then it 7032 * could also be the previous switch still being 7033 * announced. 7034 * We can simply ignore it for now, if it is a future 7035 * switch the AP will continue to announce it anyway. 7036 */ 7037 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 7038 return; 7039 7040 delay_jiffies = TU_TO_JIFFIES(delay); 7041 7042 /* Link switching can take time, so schedule it 7043 * 100ms before to be ready on time 7044 */ 7045 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 7046 delay_jiffies -= 7047 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 7048 else 7049 delay_jiffies = 0; 7050 7051 sdata->u.mgd.ttlm_info = ttlm_info; 7052 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7053 &sdata->u.mgd.ttlm_work); 7054 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7055 &sdata->u.mgd.ttlm_work, 7056 delay_jiffies); 7057 return; 7058 } 7059 } 7060 } 7061 7062 static void 7063 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 7064 int reporting_link_id, 7065 struct ieee802_11_elems *elems) 7066 { 7067 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7068 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 7069 const struct element *sub; 7070 const u8 *subelems; 7071 size_t subelems_len; 7072 u8 common_size; 7073 int link_id; 7074 7075 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 7076 return; 7077 7078 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 7079 subelems = (u8 *)elems->ml_basic + common_size; 7080 subelems_len = elems->ml_basic_len - common_size; 7081 7082 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 7083 subelems, subelems_len) { 7084 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 7085 struct ieee80211_link_data *link; 7086 ssize_t len; 7087 7088 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 7089 sub->datalen)) 7090 continue; 7091 7092 link_id = le16_get_bits(prof->control, 7093 IEEE80211_MLE_STA_CONTROL_LINK_ID); 7094 /* need a valid link ID, but also not our own, both AP bugs */ 7095 if (link_id == reporting_link_id || 7096 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 7097 continue; 7098 7099 link = sdata_dereference(sdata->link[link_id], sdata); 7100 if (!link) 7101 continue; 7102 7103 len = cfg80211_defragment_element(sub, subelems, subelems_len, 7104 NULL, 0, 7105 IEEE80211_MLE_SUBELEM_FRAGMENT); 7106 if (WARN_ON(len < 0)) 7107 continue; 7108 7109 sta_profiles[link_id] = sub; 7110 sta_profiles_len[link_id] = len; 7111 } 7112 7113 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 7114 struct ieee80211_mle_per_sta_profile *prof; 7115 struct ieee802_11_elems *prof_elems; 7116 struct ieee80211_link_data *link; 7117 ssize_t len; 7118 7119 if (link_id == reporting_link_id) 7120 continue; 7121 7122 link = sdata_dereference(sdata->link[link_id], sdata); 7123 if (!link) 7124 continue; 7125 7126 if (!sta_profiles[link_id]) { 7127 prof_elems = NULL; 7128 goto handle; 7129 } 7130 7131 /* we can defragment in-place, won't use the buffer again */ 7132 len = cfg80211_defragment_element(sta_profiles[link_id], 7133 subelems, subelems_len, 7134 (void *)sta_profiles[link_id], 7135 sta_profiles_len[link_id], 7136 IEEE80211_MLE_SUBELEM_FRAGMENT); 7137 if (WARN_ON(len != sta_profiles_len[link_id])) 7138 continue; 7139 7140 prof = (void *)sta_profiles[link_id]; 7141 prof_elems = ieee802_11_parse_elems(prof->variable + 7142 (prof->sta_info_len - 1), 7143 len - 7144 (prof->sta_info_len - 1), 7145 false, NULL); 7146 7147 /* memory allocation failed - let's hope that's transient */ 7148 if (!prof_elems) 7149 continue; 7150 7151 handle: 7152 /* 7153 * FIXME: the timings here are obviously incorrect, 7154 * but only older Intel drivers seem to care, and 7155 * those don't have MLO. If you really need this, 7156 * the problem is having to calculate it with the 7157 * TSF offset etc. The device_timestamp is still 7158 * correct, of course. 7159 */ 7160 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 7161 IEEE80211_CSA_SOURCE_OTHER_LINK); 7162 kfree(prof_elems); 7163 } 7164 } 7165 7166 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 7167 const struct ieee802_11_elems *elems) 7168 { 7169 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 7170 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 7171 7172 if (!elems->ssid) 7173 return false; 7174 7175 /* hidden SSID: zero length */ 7176 if (elems->ssid_len == 0) 7177 return false; 7178 7179 if (elems->ssid_len != cfg->ssid_len) 7180 return true; 7181 7182 /* hidden SSID: zeroed out */ 7183 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 7184 return false; 7185 7186 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 7187 } 7188 7189 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 7190 struct ieee80211_hdr *hdr, size_t len, 7191 struct ieee80211_rx_status *rx_status) 7192 { 7193 struct ieee80211_sub_if_data *sdata = link->sdata; 7194 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7195 struct ieee80211_bss_conf *bss_conf = link->conf; 7196 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 7197 struct ieee80211_mgmt *mgmt = (void *) hdr; 7198 size_t baselen; 7199 struct ieee802_11_elems *elems; 7200 struct ieee80211_local *local = sdata->local; 7201 struct ieee80211_chanctx_conf *chanctx_conf; 7202 struct ieee80211_supported_band *sband; 7203 struct ieee80211_channel *chan; 7204 struct link_sta_info *link_sta; 7205 struct sta_info *sta; 7206 u64 changed = 0; 7207 bool erp_valid; 7208 u8 erp_value = 0; 7209 u32 ncrc = 0; 7210 u8 *bssid, *variable = mgmt->u.beacon.variable; 7211 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7212 struct ieee80211_elems_parse_params parse_params = { 7213 .mode = link->u.mgd.conn.mode, 7214 .link_id = -1, 7215 .from_ap = true, 7216 }; 7217 7218 lockdep_assert_wiphy(local->hw.wiphy); 7219 7220 /* Process beacon from the current BSS */ 7221 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 7222 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 7223 struct ieee80211_ext *ext = (void *) mgmt; 7224 variable = ext->u.s1g_beacon.variable + 7225 ieee80211_s1g_optional_len(ext->frame_control); 7226 } 7227 7228 baselen = (u8 *) variable - (u8 *) mgmt; 7229 if (baselen > len) 7230 return; 7231 7232 parse_params.start = variable; 7233 parse_params.len = len - baselen; 7234 7235 rcu_read_lock(); 7236 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 7237 if (!chanctx_conf) { 7238 rcu_read_unlock(); 7239 return; 7240 } 7241 7242 if (ieee80211_rx_status_to_khz(rx_status) != 7243 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 7244 rcu_read_unlock(); 7245 return; 7246 } 7247 chan = chanctx_conf->def.chan; 7248 rcu_read_unlock(); 7249 7250 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 7251 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 7252 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 7253 parse_params.bss = ifmgd->assoc_data->link[0].bss; 7254 elems = ieee802_11_parse_elems_full(&parse_params); 7255 if (!elems) 7256 return; 7257 7258 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7259 7260 if (elems->dtim_period) 7261 link->u.mgd.dtim_period = elems->dtim_period; 7262 link->u.mgd.have_beacon = true; 7263 ifmgd->assoc_data->need_beacon = false; 7264 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7265 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7266 bss_conf->sync_tsf = 7267 le64_to_cpu(mgmt->u.beacon.timestamp); 7268 bss_conf->sync_device_ts = 7269 rx_status->device_timestamp; 7270 bss_conf->sync_dtim_count = elems->dtim_count; 7271 } 7272 7273 if (elems->mbssid_config_ie) 7274 bss_conf->profile_periodicity = 7275 elems->mbssid_config_ie->profile_periodicity; 7276 else 7277 bss_conf->profile_periodicity = 0; 7278 7279 if (elems->ext_capab_len >= 11 && 7280 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 7281 bss_conf->ema_ap = true; 7282 else 7283 bss_conf->ema_ap = false; 7284 7285 /* continue assoc process */ 7286 ifmgd->assoc_data->timeout = jiffies; 7287 ifmgd->assoc_data->timeout_started = true; 7288 run_again(sdata, ifmgd->assoc_data->timeout); 7289 kfree(elems); 7290 return; 7291 } 7292 7293 if (!ifmgd->associated || 7294 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 7295 return; 7296 bssid = link->u.mgd.bssid; 7297 7298 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 7299 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 7300 local, rx_status); 7301 7302 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 7303 mlme_dbg_ratelimited(sdata, 7304 "cancelling AP probe due to a received beacon\n"); 7305 ieee80211_reset_ap_probe(sdata); 7306 } 7307 7308 /* 7309 * Push the beacon loss detection into the future since 7310 * we are processing a beacon from the AP just now. 7311 */ 7312 ieee80211_sta_reset_beacon_monitor(sdata); 7313 7314 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 7315 * element (which carries the beacon interval). Don't forget to add a 7316 * bit to care_about_ies[] above if mac80211 is interested in a 7317 * changing S1G element. 7318 */ 7319 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7320 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 7321 parse_params.bss = bss_conf->bss; 7322 parse_params.filter = care_about_ies; 7323 parse_params.crc = ncrc; 7324 elems = ieee802_11_parse_elems_full(&parse_params); 7325 if (!elems) 7326 return; 7327 7328 if (rx_status->flag & RX_FLAG_DECRYPTED && 7329 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 7330 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 7331 sdata->vif.cfg.ap_addr); 7332 __ieee80211_disconnect(sdata); 7333 return; 7334 } 7335 7336 ncrc = elems->crc; 7337 7338 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 7339 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 7340 if (local->hw.conf.dynamic_ps_timeout > 0) { 7341 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 7342 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 7343 ieee80211_hw_config(local, 7344 IEEE80211_CONF_CHANGE_PS); 7345 } 7346 ieee80211_send_nullfunc(local, sdata, false); 7347 } else if (!local->pspolling && sdata->u.mgd.powersave) { 7348 local->pspolling = true; 7349 7350 /* 7351 * Here is assumed that the driver will be 7352 * able to send ps-poll frame and receive a 7353 * response even though power save mode is 7354 * enabled, but some drivers might require 7355 * to disable power save here. This needs 7356 * to be investigated. 7357 */ 7358 ieee80211_send_pspoll(local, sdata); 7359 } 7360 } 7361 7362 if (sdata->vif.p2p || 7363 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 7364 struct ieee80211_p2p_noa_attr noa = {}; 7365 int ret; 7366 7367 ret = cfg80211_get_p2p_attr(variable, 7368 len - baselen, 7369 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 7370 (u8 *) &noa, sizeof(noa)); 7371 if (ret >= 2) { 7372 if (link->u.mgd.p2p_noa_index != noa.index) { 7373 /* valid noa_attr and index changed */ 7374 link->u.mgd.p2p_noa_index = noa.index; 7375 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 7376 changed |= BSS_CHANGED_P2P_PS; 7377 /* 7378 * make sure we update all information, the CRC 7379 * mechanism doesn't look at P2P attributes. 7380 */ 7381 link->u.mgd.beacon_crc_valid = false; 7382 } 7383 } else if (link->u.mgd.p2p_noa_index != -1) { 7384 /* noa_attr not found and we had valid noa_attr before */ 7385 link->u.mgd.p2p_noa_index = -1; 7386 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 7387 changed |= BSS_CHANGED_P2P_PS; 7388 link->u.mgd.beacon_crc_valid = false; 7389 } 7390 } 7391 7392 /* 7393 * Update beacon timing and dtim count on every beacon appearance. This 7394 * will allow the driver to use the most updated values. Do it before 7395 * comparing this one with last received beacon. 7396 * IMPORTANT: These parameters would possibly be out of sync by the time 7397 * the driver will use them. The synchronized view is currently 7398 * guaranteed only in certain callbacks. 7399 */ 7400 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 7401 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 7402 bss_conf->sync_tsf = 7403 le64_to_cpu(mgmt->u.beacon.timestamp); 7404 bss_conf->sync_device_ts = 7405 rx_status->device_timestamp; 7406 bss_conf->sync_dtim_count = elems->dtim_count; 7407 } 7408 7409 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 7410 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 7411 goto free; 7412 link->u.mgd.beacon_crc = ncrc; 7413 link->u.mgd.beacon_crc_valid = true; 7414 7415 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 7416 7417 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 7418 rx_status->device_timestamp, 7419 elems, elems, 7420 IEEE80211_CSA_SOURCE_BEACON); 7421 7422 /* note that after this elems->ml_basic can no longer be used fully */ 7423 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 7424 7425 ieee80211_mgd_update_bss_param_ch_cnt(sdata, bss_conf, elems); 7426 7427 if (!sdata->u.mgd.epcs.enabled && 7428 !link->u.mgd.disable_wmm_tracking && 7429 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 7430 elems->wmm_param_len, 7431 elems->mu_edca_param_set)) 7432 changed |= BSS_CHANGED_QOS; 7433 7434 /* 7435 * If we haven't had a beacon before, tell the driver about the 7436 * DTIM period (and beacon timing if desired) now. 7437 */ 7438 if (!link->u.mgd.have_beacon) { 7439 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 7440 bss_conf->dtim_period = elems->dtim_period ?: 1; 7441 7442 changed |= BSS_CHANGED_BEACON_INFO; 7443 link->u.mgd.have_beacon = true; 7444 7445 ieee80211_recalc_ps(local); 7446 7447 ieee80211_recalc_ps_vif(sdata); 7448 } 7449 7450 if (elems->erp_info) { 7451 erp_valid = true; 7452 erp_value = elems->erp_info[0]; 7453 } else { 7454 erp_valid = false; 7455 } 7456 7457 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 7458 changed |= ieee80211_handle_bss_capability(link, 7459 le16_to_cpu(mgmt->u.beacon.capab_info), 7460 erp_valid, erp_value); 7461 7462 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7463 if (WARN_ON(!sta)) { 7464 goto free; 7465 } 7466 link_sta = rcu_dereference_protected(sta->link[link->link_id], 7467 lockdep_is_held(&local->hw.wiphy->mtx)); 7468 if (WARN_ON(!link_sta)) { 7469 goto free; 7470 } 7471 7472 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 7473 goto free; 7474 7475 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 7476 7477 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 7478 7479 if (ieee80211_config_bw(link, elems, true, &changed, "beacon")) { 7480 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7481 WLAN_REASON_DEAUTH_LEAVING, 7482 true, deauth_buf); 7483 ieee80211_report_disconnect(sdata, deauth_buf, 7484 sizeof(deauth_buf), true, 7485 WLAN_REASON_DEAUTH_LEAVING, 7486 false); 7487 goto free; 7488 } 7489 7490 if (elems->opmode_notif) 7491 ieee80211_vht_handle_opmode(sdata, link_sta, 7492 *elems->opmode_notif, 7493 rx_status->band); 7494 7495 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 7496 elems->country_elem, 7497 elems->country_elem_len, 7498 elems->pwr_constr_elem, 7499 elems->cisco_dtpc_elem); 7500 7501 ieee80211_ml_reconfiguration(sdata, elems); 7502 ieee80211_process_adv_ttlm(sdata, elems, 7503 le64_to_cpu(mgmt->u.beacon.timestamp)); 7504 7505 ieee80211_link_info_change_notify(sdata, link, changed); 7506 free: 7507 kfree(elems); 7508 } 7509 7510 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7511 struct ieee80211_neg_ttlm neg_ttlm) 7512 { 7513 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7514 u8 i; 7515 7516 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7517 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7518 7519 /* If there is an active TTLM, unset previously suspended links */ 7520 if (sdata->vif.neg_ttlm.valid) 7521 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7522 7523 /* exclude links that are already disabled by advertised TTLM */ 7524 new_active_links = 7525 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7526 new_suspended_links = 7527 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7528 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7529 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7530 new_dormant_links, new_suspended_links)) 7531 return; 7532 7533 sdata->vif.neg_ttlm = neg_ttlm; 7534 sdata->vif.neg_ttlm.valid = true; 7535 } 7536 7537 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7538 struct wiphy_work *work) 7539 { 7540 struct ieee80211_sub_if_data *sdata = 7541 container_of(work, struct ieee80211_sub_if_data, 7542 u.mgd.neg_ttlm_timeout_work.work); 7543 7544 sdata_info(sdata, 7545 "No negotiated TTLM response from AP, disconnecting.\n"); 7546 7547 __ieee80211_disconnect(sdata); 7548 } 7549 7550 static void 7551 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7552 struct ieee80211_neg_ttlm *neg_ttlm) 7553 { 7554 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7555 7556 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7557 sizeof(neg_ttlm->downlink))) { 7558 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7559 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7560 } else { 7561 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7562 } 7563 7564 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7565 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7566 __le16 map; 7567 7568 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7569 7570 pos = skb_put(skb, len + 2); 7571 *pos++ = WLAN_EID_EXTENSION; 7572 len_pos = pos++; 7573 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7574 *pos++ = direction[i]; 7575 map_ind_pos = pos++; 7576 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7577 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7578 cpu_to_le16(neg_ttlm->uplink[tid]) : 7579 cpu_to_le16(neg_ttlm->downlink[tid]); 7580 if (!map) 7581 continue; 7582 7583 len += 2; 7584 map_ind |= BIT(tid); 7585 skb_put_data(skb, &map, sizeof(map)); 7586 } 7587 7588 *map_ind_pos = map_ind; 7589 *len_pos = len; 7590 7591 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7592 break; 7593 } 7594 } 7595 7596 static void 7597 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7598 struct ieee80211_neg_ttlm *neg_ttlm, 7599 u8 dialog_token) 7600 { 7601 struct ieee80211_local *local = sdata->local; 7602 struct ieee80211_mgmt *mgmt; 7603 struct sk_buff *skb; 7604 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7605 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7606 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7607 7608 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7609 if (!skb) 7610 return; 7611 7612 skb_reserve(skb, local->tx_headroom); 7613 mgmt = skb_put_zero(skb, hdr_len); 7614 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7615 IEEE80211_STYPE_ACTION); 7616 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7617 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7618 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7619 7620 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7621 mgmt->u.action.u.ttlm_req.action_code = 7622 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7623 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7624 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7625 ieee80211_tx_skb(sdata, skb); 7626 } 7627 7628 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7629 struct cfg80211_ttlm_params *params) 7630 { 7631 struct ieee80211_neg_ttlm neg_ttlm = {}; 7632 u8 i; 7633 7634 if (!ieee80211_vif_is_mld(&sdata->vif) || 7635 !(sdata->vif.cfg.mld_capa_op & 7636 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7637 return -EINVAL; 7638 7639 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7640 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7641 (params->ulink[i] & ~sdata->vif.valid_links)) 7642 return -EINVAL; 7643 7644 neg_ttlm.downlink[i] = params->dlink[i]; 7645 neg_ttlm.uplink[i] = params->ulink[i]; 7646 } 7647 7648 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7649 NEG_TTLM_RES_ACCEPT) 7650 return -EINVAL; 7651 7652 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7653 sdata->u.mgd.dialog_token_alloc++; 7654 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7655 sdata->u.mgd.dialog_token_alloc); 7656 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7657 &sdata->u.mgd.neg_ttlm_timeout_work); 7658 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7659 &sdata->u.mgd.neg_ttlm_timeout_work, 7660 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7661 return 0; 7662 } 7663 7664 static void 7665 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7666 enum ieee80211_neg_ttlm_res ttlm_res, 7667 u8 dialog_token, 7668 struct ieee80211_neg_ttlm *neg_ttlm) 7669 { 7670 struct ieee80211_local *local = sdata->local; 7671 struct ieee80211_mgmt *mgmt; 7672 struct sk_buff *skb; 7673 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7674 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7675 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7676 u16 status_code; 7677 7678 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7679 if (!skb) 7680 return; 7681 7682 skb_reserve(skb, local->tx_headroom); 7683 mgmt = skb_put_zero(skb, hdr_len); 7684 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7685 IEEE80211_STYPE_ACTION); 7686 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7687 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7688 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7689 7690 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7691 mgmt->u.action.u.ttlm_res.action_code = 7692 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7693 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7694 switch (ttlm_res) { 7695 default: 7696 WARN_ON(1); 7697 fallthrough; 7698 case NEG_TTLM_RES_REJECT: 7699 status_code = WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7700 break; 7701 case NEG_TTLM_RES_ACCEPT: 7702 status_code = WLAN_STATUS_SUCCESS; 7703 break; 7704 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7705 status_code = WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7706 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7707 break; 7708 } 7709 7710 mgmt->u.action.u.ttlm_res.status_code = cpu_to_le16(status_code); 7711 ieee80211_tx_skb(sdata, skb); 7712 } 7713 7714 static int 7715 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7716 const struct ieee80211_ttlm_elem *ttlm, 7717 struct ieee80211_neg_ttlm *neg_ttlm, 7718 u8 *direction) 7719 { 7720 u8 control, link_map_presence, map_size, tid; 7721 u8 *pos; 7722 7723 /* The element size was already validated in 7724 * ieee80211_tid_to_link_map_size_ok() 7725 */ 7726 pos = (void *)ttlm->optional; 7727 7728 control = ttlm->control; 7729 7730 /* mapping switch time and expected duration fields are not expected 7731 * in case of negotiated TTLM 7732 */ 7733 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7734 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7735 mlme_dbg(sdata, 7736 "Invalid TTLM element in negotiated TTLM request\n"); 7737 return -EINVAL; 7738 } 7739 7740 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7741 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7742 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7743 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7744 } 7745 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7746 return 0; 7747 } 7748 7749 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7750 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7751 *direction != IEEE80211_TTLM_DIRECTION_UP && 7752 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7753 return -EINVAL; 7754 7755 link_map_presence = *pos; 7756 pos++; 7757 7758 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7759 map_size = 1; 7760 else 7761 map_size = 2; 7762 7763 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7764 u16 map; 7765 7766 if (link_map_presence & BIT(tid)) { 7767 map = ieee80211_get_ttlm(map_size, pos); 7768 if (!map) { 7769 mlme_dbg(sdata, 7770 "No active links for TID %d", tid); 7771 return -EINVAL; 7772 } 7773 } else { 7774 map = 0; 7775 } 7776 7777 switch (*direction) { 7778 case IEEE80211_TTLM_DIRECTION_BOTH: 7779 neg_ttlm->downlink[tid] = map; 7780 neg_ttlm->uplink[tid] = map; 7781 break; 7782 case IEEE80211_TTLM_DIRECTION_DOWN: 7783 neg_ttlm->downlink[tid] = map; 7784 break; 7785 case IEEE80211_TTLM_DIRECTION_UP: 7786 neg_ttlm->uplink[tid] = map; 7787 break; 7788 default: 7789 return -EINVAL; 7790 } 7791 pos += map_size; 7792 } 7793 return 0; 7794 } 7795 7796 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7797 struct ieee80211_mgmt *mgmt, size_t len) 7798 { 7799 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7800 size_t ies_len; 7801 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7802 struct ieee802_11_elems *elems = NULL; 7803 struct ieee80211_neg_ttlm neg_ttlm = {}; 7804 7805 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7806 7807 if (!ieee80211_vif_is_mld(&sdata->vif)) 7808 return; 7809 7810 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7811 ies_len = len - offsetof(struct ieee80211_mgmt, 7812 u.action.u.ttlm_req.variable); 7813 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7814 ies_len, true, NULL); 7815 if (!elems) { 7816 ttlm_res = NEG_TTLM_RES_REJECT; 7817 goto out; 7818 } 7819 7820 for (i = 0; i < elems->ttlm_num; i++) { 7821 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7822 &neg_ttlm, &direction[i]) || 7823 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7824 elems->ttlm_num != 1)) { 7825 ttlm_res = NEG_TTLM_RES_REJECT; 7826 goto out; 7827 } 7828 } 7829 7830 if (!elems->ttlm_num || 7831 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7832 ttlm_res = NEG_TTLM_RES_REJECT; 7833 goto out; 7834 } 7835 7836 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7837 if ((neg_ttlm.downlink[i] && 7838 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7839 (neg_ttlm.uplink[i] && 7840 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7841 ttlm_res = NEG_TTLM_RES_REJECT; 7842 goto out; 7843 } 7844 } 7845 7846 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7847 7848 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7849 goto out; 7850 7851 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7852 out: 7853 kfree(elems); 7854 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7855 } 7856 7857 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7858 struct ieee80211_mgmt *mgmt, size_t len) 7859 { 7860 if (!ieee80211_vif_is_mld(&sdata->vif) || 7861 mgmt->u.action.u.ttlm_req.dialog_token != 7862 sdata->u.mgd.dialog_token_alloc) 7863 return; 7864 7865 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7866 &sdata->u.mgd.neg_ttlm_timeout_work); 7867 7868 /* MLD station sends a TID to link mapping request, mainly to handle 7869 * BTM (BSS transition management) request, in which case it needs to 7870 * restrict the active links set. 7871 * In this case it's not expected that the MLD AP will reject the 7872 * negotiated TTLM request. 7873 * This can be better implemented in the future, to handle request 7874 * rejections. 7875 */ 7876 if (le16_to_cpu(mgmt->u.action.u.ttlm_res.status_code) != WLAN_STATUS_SUCCESS) 7877 __ieee80211_disconnect(sdata); 7878 } 7879 7880 void ieee80211_process_ttlm_teardown(struct ieee80211_sub_if_data *sdata) 7881 { 7882 u16 new_dormant_links; 7883 7884 if (!sdata->vif.neg_ttlm.valid) 7885 return; 7886 7887 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7888 new_dormant_links = 7889 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7890 sdata->vif.suspended_links = 0; 7891 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7892 new_dormant_links); 7893 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7894 BSS_CHANGED_MLD_VALID_LINKS); 7895 } 7896 7897 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7898 struct wiphy_work *work) 7899 { 7900 struct ieee80211_sub_if_data *sdata = 7901 container_of(work, struct ieee80211_sub_if_data, 7902 u.mgd.teardown_ttlm_work); 7903 7904 ieee80211_process_ttlm_teardown(sdata); 7905 } 7906 7907 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7908 { 7909 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7910 struct ieee80211_local *local = sdata->local; 7911 struct ieee80211_mgmt *mgmt; 7912 struct sk_buff *skb; 7913 int frame_len = offsetofend(struct ieee80211_mgmt, 7914 u.action.u.ttlm_tear_down); 7915 struct ieee80211_tx_info *info; 7916 7917 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7918 if (!skb) 7919 return; 7920 7921 skb_reserve(skb, local->hw.extra_tx_headroom); 7922 mgmt = skb_put_zero(skb, frame_len); 7923 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7924 IEEE80211_STYPE_ACTION); 7925 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7926 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7927 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7928 7929 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7930 mgmt->u.action.u.ttlm_tear_down.action_code = 7931 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7932 7933 info = IEEE80211_SKB_CB(skb); 7934 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7935 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7936 ieee80211_tx_skb(sdata, skb); 7937 } 7938 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7939 7940 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7941 struct sk_buff *skb) 7942 { 7943 struct ieee80211_link_data *link = &sdata->deflink; 7944 struct ieee80211_rx_status *rx_status; 7945 struct ieee80211_hdr *hdr; 7946 u16 fc; 7947 7948 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7949 7950 rx_status = (struct ieee80211_rx_status *) skb->cb; 7951 hdr = (struct ieee80211_hdr *) skb->data; 7952 fc = le16_to_cpu(hdr->frame_control); 7953 7954 switch (fc & IEEE80211_FCTL_STYPE) { 7955 case IEEE80211_STYPE_S1G_BEACON: 7956 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7957 break; 7958 } 7959 } 7960 7961 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7962 struct sk_buff *skb) 7963 { 7964 struct ieee80211_link_data *link = &sdata->deflink; 7965 struct ieee80211_rx_status *rx_status; 7966 struct ieee802_11_elems *elems; 7967 struct ieee80211_mgmt *mgmt; 7968 u16 fc; 7969 int ies_len; 7970 7971 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7972 7973 rx_status = (struct ieee80211_rx_status *) skb->cb; 7974 mgmt = (struct ieee80211_mgmt *) skb->data; 7975 fc = le16_to_cpu(mgmt->frame_control); 7976 7977 if (rx_status->link_valid) { 7978 link = sdata_dereference(sdata->link[rx_status->link_id], 7979 sdata); 7980 if (!link) 7981 return; 7982 } 7983 7984 switch (fc & IEEE80211_FCTL_STYPE) { 7985 case IEEE80211_STYPE_BEACON: 7986 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7987 skb->len, rx_status); 7988 break; 7989 case IEEE80211_STYPE_PROBE_RESP: 7990 ieee80211_rx_mgmt_probe_resp(link, skb); 7991 break; 7992 case IEEE80211_STYPE_AUTH: 7993 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7994 break; 7995 case IEEE80211_STYPE_DEAUTH: 7996 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7997 break; 7998 case IEEE80211_STYPE_DISASSOC: 7999 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 8000 break; 8001 case IEEE80211_STYPE_ASSOC_RESP: 8002 case IEEE80211_STYPE_REASSOC_RESP: 8003 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 8004 break; 8005 case IEEE80211_STYPE_ACTION: 8006 if (!sdata->u.mgd.associated || 8007 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 8008 break; 8009 8010 switch (mgmt->u.action.category) { 8011 case WLAN_CATEGORY_SPECTRUM_MGMT: 8012 ies_len = skb->len - 8013 offsetof(struct ieee80211_mgmt, 8014 u.action.u.chan_switch.variable); 8015 8016 if (ies_len < 0) 8017 break; 8018 8019 /* CSA IE cannot be overridden, no need for BSSID */ 8020 elems = ieee802_11_parse_elems( 8021 mgmt->u.action.u.chan_switch.variable, 8022 ies_len, true, NULL); 8023 8024 if (elems && !elems->parse_error) { 8025 enum ieee80211_csa_source src = 8026 IEEE80211_CSA_SOURCE_PROT_ACTION; 8027 8028 ieee80211_sta_process_chanswitch(link, 8029 rx_status->mactime, 8030 rx_status->device_timestamp, 8031 elems, elems, 8032 src); 8033 } 8034 kfree(elems); 8035 break; 8036 case WLAN_CATEGORY_PUBLIC: 8037 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 8038 ies_len = skb->len - 8039 offsetof(struct ieee80211_mgmt, 8040 u.action.u.ext_chan_switch.variable); 8041 8042 if (ies_len < 0) 8043 break; 8044 8045 /* 8046 * extended CSA IE can't be overridden, no need for 8047 * BSSID 8048 */ 8049 elems = ieee802_11_parse_elems( 8050 mgmt->u.action.u.ext_chan_switch.variable, 8051 ies_len, true, NULL); 8052 8053 if (elems && !elems->parse_error) { 8054 enum ieee80211_csa_source src; 8055 8056 if (mgmt->u.action.category == 8057 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 8058 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 8059 else 8060 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 8061 8062 /* for the handling code pretend it was an IE */ 8063 elems->ext_chansw_ie = 8064 &mgmt->u.action.u.ext_chan_switch.data; 8065 8066 ieee80211_sta_process_chanswitch(link, 8067 rx_status->mactime, 8068 rx_status->device_timestamp, 8069 elems, elems, 8070 src); 8071 } 8072 8073 kfree(elems); 8074 break; 8075 } 8076 break; 8077 } 8078 } 8079 8080 static void ieee80211_sta_timer(struct timer_list *t) 8081 { 8082 struct ieee80211_sub_if_data *sdata = 8083 timer_container_of(sdata, t, u.mgd.timer); 8084 8085 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 8086 } 8087 8088 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 8089 u8 reason, bool tx) 8090 { 8091 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8092 8093 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 8094 tx, frame_buf); 8095 8096 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8097 reason, false); 8098 } 8099 8100 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 8101 { 8102 struct ieee80211_local *local = sdata->local; 8103 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8104 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 8105 u32 tx_flags = 0; 8106 u16 trans = 1; 8107 u16 status = 0; 8108 struct ieee80211_prep_tx_info info = { 8109 .subtype = IEEE80211_STYPE_AUTH, 8110 }; 8111 8112 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8113 8114 if (WARN_ON_ONCE(!auth_data)) 8115 return -EINVAL; 8116 8117 auth_data->tries++; 8118 8119 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 8120 sdata_info(sdata, "authentication with %pM timed out\n", 8121 auth_data->ap_addr); 8122 8123 /* 8124 * Most likely AP is not in the range so remove the 8125 * bss struct for that AP. 8126 */ 8127 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 8128 8129 return -ETIMEDOUT; 8130 } 8131 8132 if (auth_data->algorithm == WLAN_AUTH_SAE) 8133 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 8134 8135 info.link_id = auth_data->link_id; 8136 drv_mgd_prepare_tx(local, sdata, &info); 8137 8138 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 8139 auth_data->ap_addr, auth_data->tries, 8140 IEEE80211_AUTH_MAX_TRIES); 8141 8142 auth_data->expected_transaction = 2; 8143 8144 if (auth_data->algorithm == WLAN_AUTH_SAE) { 8145 trans = auth_data->sae_trans; 8146 status = auth_data->sae_status; 8147 auth_data->expected_transaction = trans; 8148 } 8149 8150 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8151 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 8152 IEEE80211_TX_INTFL_MLME_CONN_TX; 8153 8154 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 8155 auth_data->data, auth_data->data_len, 8156 auth_data->ap_addr, auth_data->ap_addr, 8157 NULL, 0, 0, tx_flags); 8158 8159 if (tx_flags == 0) { 8160 if (auth_data->algorithm == WLAN_AUTH_SAE) 8161 auth_data->timeout = jiffies + 8162 IEEE80211_AUTH_TIMEOUT_SAE; 8163 else 8164 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 8165 } else { 8166 auth_data->timeout = 8167 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 8168 } 8169 8170 auth_data->timeout_started = true; 8171 run_again(sdata, auth_data->timeout); 8172 8173 return 0; 8174 } 8175 8176 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 8177 { 8178 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 8179 struct ieee80211_local *local = sdata->local; 8180 int ret; 8181 8182 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8183 8184 assoc_data->tries++; 8185 assoc_data->comeback = false; 8186 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 8187 sdata_info(sdata, "association with %pM timed out\n", 8188 assoc_data->ap_addr); 8189 8190 /* 8191 * Most likely AP is not in the range so remove the 8192 * bss struct for that AP. 8193 */ 8194 cfg80211_unlink_bss(local->hw.wiphy, 8195 assoc_data->link[assoc_data->assoc_link_id].bss); 8196 8197 return -ETIMEDOUT; 8198 } 8199 8200 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 8201 assoc_data->ap_addr, assoc_data->tries, 8202 IEEE80211_ASSOC_MAX_TRIES); 8203 ret = ieee80211_send_assoc(sdata); 8204 if (ret) 8205 return ret; 8206 8207 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8208 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 8209 assoc_data->timeout_started = true; 8210 run_again(sdata, assoc_data->timeout); 8211 } else { 8212 assoc_data->timeout = 8213 round_jiffies_up(jiffies + 8214 IEEE80211_ASSOC_TIMEOUT_LONG); 8215 assoc_data->timeout_started = true; 8216 run_again(sdata, assoc_data->timeout); 8217 } 8218 8219 return 0; 8220 } 8221 8222 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 8223 __le16 fc, bool acked) 8224 { 8225 struct ieee80211_local *local = sdata->local; 8226 8227 sdata->u.mgd.status_fc = fc; 8228 sdata->u.mgd.status_acked = acked; 8229 sdata->u.mgd.status_received = true; 8230 8231 wiphy_work_queue(local->hw.wiphy, &sdata->work); 8232 } 8233 8234 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 8235 { 8236 struct ieee80211_local *local = sdata->local; 8237 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8238 8239 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8240 8241 if (ifmgd->status_received) { 8242 __le16 fc = ifmgd->status_fc; 8243 bool status_acked = ifmgd->status_acked; 8244 8245 ifmgd->status_received = false; 8246 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 8247 if (status_acked) { 8248 if (ifmgd->auth_data->algorithm == 8249 WLAN_AUTH_SAE) 8250 ifmgd->auth_data->timeout = 8251 jiffies + 8252 IEEE80211_AUTH_TIMEOUT_SAE; 8253 else 8254 ifmgd->auth_data->timeout = 8255 jiffies + 8256 IEEE80211_AUTH_TIMEOUT_SHORT; 8257 run_again(sdata, ifmgd->auth_data->timeout); 8258 } else { 8259 ifmgd->auth_data->timeout = jiffies - 1; 8260 } 8261 ifmgd->auth_data->timeout_started = true; 8262 } else if (ifmgd->assoc_data && 8263 !ifmgd->assoc_data->comeback && 8264 (ieee80211_is_assoc_req(fc) || 8265 ieee80211_is_reassoc_req(fc))) { 8266 /* 8267 * Update association timeout based on the TX status 8268 * for the (Re)Association Request frame. Skip this if 8269 * we have already processed a (Re)Association Response 8270 * frame that indicated need for association comeback 8271 * at a specific time in the future. This could happen 8272 * if the TX status information is delayed enough for 8273 * the response to be received and processed first. 8274 */ 8275 if (status_acked) { 8276 ifmgd->assoc_data->timeout = 8277 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 8278 run_again(sdata, ifmgd->assoc_data->timeout); 8279 } else { 8280 ifmgd->assoc_data->timeout = jiffies - 1; 8281 } 8282 ifmgd->assoc_data->timeout_started = true; 8283 } 8284 } 8285 8286 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 8287 time_after(jiffies, ifmgd->auth_data->timeout)) { 8288 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 8289 /* 8290 * ok ... we waited for assoc or continuation but 8291 * userspace didn't do it, so kill the auth data 8292 */ 8293 ieee80211_destroy_auth_data(sdata, false); 8294 } else if (ieee80211_auth(sdata)) { 8295 u8 ap_addr[ETH_ALEN]; 8296 struct ieee80211_event event = { 8297 .type = MLME_EVENT, 8298 .u.mlme.data = AUTH_EVENT, 8299 .u.mlme.status = MLME_TIMEOUT, 8300 }; 8301 8302 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 8303 8304 ieee80211_destroy_auth_data(sdata, false); 8305 8306 cfg80211_auth_timeout(sdata->dev, ap_addr); 8307 drv_event_callback(sdata->local, sdata, &event); 8308 } 8309 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 8310 run_again(sdata, ifmgd->auth_data->timeout); 8311 8312 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 8313 time_after(jiffies, ifmgd->assoc_data->timeout)) { 8314 if ((ifmgd->assoc_data->need_beacon && 8315 !sdata->deflink.u.mgd.have_beacon) || 8316 ieee80211_do_assoc(sdata)) { 8317 struct ieee80211_event event = { 8318 .type = MLME_EVENT, 8319 .u.mlme.data = ASSOC_EVENT, 8320 .u.mlme.status = MLME_TIMEOUT, 8321 }; 8322 8323 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8324 drv_event_callback(sdata->local, sdata, &event); 8325 } 8326 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 8327 run_again(sdata, ifmgd->assoc_data->timeout); 8328 8329 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 8330 ifmgd->associated) { 8331 u8 *bssid = sdata->deflink.u.mgd.bssid; 8332 int max_tries; 8333 8334 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 8335 max_tries = max_nullfunc_tries; 8336 else 8337 max_tries = max_probe_tries; 8338 8339 /* ACK received for nullfunc probing frame */ 8340 if (!ifmgd->probe_send_count) 8341 ieee80211_reset_ap_probe(sdata); 8342 else if (ifmgd->nullfunc_failed) { 8343 if (ifmgd->probe_send_count < max_tries) { 8344 mlme_dbg(sdata, 8345 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 8346 bssid, ifmgd->probe_send_count, 8347 max_tries); 8348 ieee80211_mgd_probe_ap_send(sdata); 8349 } else { 8350 mlme_dbg(sdata, 8351 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 8352 bssid); 8353 ieee80211_sta_connection_lost(sdata, 8354 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 8355 false); 8356 } 8357 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 8358 run_again(sdata, ifmgd->probe_timeout); 8359 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 8360 mlme_dbg(sdata, 8361 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 8362 bssid, probe_wait_ms); 8363 ieee80211_sta_connection_lost(sdata, 8364 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8365 } else if (ifmgd->probe_send_count < max_tries) { 8366 mlme_dbg(sdata, 8367 "No probe response from AP %pM after %dms, try %d/%i\n", 8368 bssid, probe_wait_ms, 8369 ifmgd->probe_send_count, max_tries); 8370 ieee80211_mgd_probe_ap_send(sdata); 8371 } else { 8372 /* 8373 * We actually lost the connection ... or did we? 8374 * Let's make sure! 8375 */ 8376 mlme_dbg(sdata, 8377 "No probe response from AP %pM after %dms, disconnecting.\n", 8378 bssid, probe_wait_ms); 8379 8380 ieee80211_sta_connection_lost(sdata, 8381 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 8382 } 8383 } 8384 } 8385 8386 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 8387 { 8388 struct ieee80211_sub_if_data *sdata = 8389 timer_container_of(sdata, t, u.mgd.bcn_mon_timer); 8390 8391 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8392 return; 8393 8394 if (sdata->vif.bss_conf.csa_active && 8395 !sdata->deflink.u.mgd.csa.waiting_bcn) 8396 return; 8397 8398 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 8399 return; 8400 8401 sdata->u.mgd.connection_loss = false; 8402 wiphy_work_queue(sdata->local->hw.wiphy, 8403 &sdata->u.mgd.beacon_connection_loss_work); 8404 } 8405 8406 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 8407 { 8408 struct ieee80211_sub_if_data *sdata = 8409 timer_container_of(sdata, t, u.mgd.conn_mon_timer); 8410 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8411 struct ieee80211_local *local = sdata->local; 8412 struct sta_info *sta; 8413 unsigned long timeout; 8414 8415 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 8416 return; 8417 8418 if (sdata->vif.bss_conf.csa_active && 8419 !sdata->deflink.u.mgd.csa.waiting_bcn) 8420 return; 8421 8422 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 8423 if (!sta) 8424 return; 8425 8426 timeout = sta->deflink.status_stats.last_ack; 8427 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 8428 timeout = sta->deflink.rx_stats.last_rx; 8429 timeout += IEEE80211_CONNECTION_IDLE_TIME; 8430 8431 /* If timeout is after now, then update timer to fire at 8432 * the later date, but do not actually probe at this time. 8433 */ 8434 if (time_is_after_jiffies(timeout)) { 8435 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 8436 return; 8437 } 8438 8439 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 8440 } 8441 8442 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 8443 struct wiphy_work *work) 8444 { 8445 struct ieee80211_sub_if_data *sdata = 8446 container_of(work, struct ieee80211_sub_if_data, 8447 u.mgd.monitor_work); 8448 8449 ieee80211_mgd_probe_ap(sdata, false); 8450 } 8451 8452 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 8453 { 8454 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 8455 __ieee80211_stop_poll(sdata); 8456 8457 /* let's probe the connection once */ 8458 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 8459 wiphy_work_queue(sdata->local->hw.wiphy, 8460 &sdata->u.mgd.monitor_work); 8461 } 8462 } 8463 8464 #ifdef CONFIG_PM 8465 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 8466 { 8467 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8468 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8469 8470 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8471 8472 if (ifmgd->auth_data || ifmgd->assoc_data) { 8473 const u8 *ap_addr = ifmgd->auth_data ? 8474 ifmgd->auth_data->ap_addr : 8475 ifmgd->assoc_data->ap_addr; 8476 8477 /* 8478 * If we are trying to authenticate / associate while suspending, 8479 * cfg80211 won't know and won't actually abort those attempts, 8480 * thus we need to do that ourselves. 8481 */ 8482 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 8483 IEEE80211_STYPE_DEAUTH, 8484 WLAN_REASON_DEAUTH_LEAVING, 8485 false, frame_buf); 8486 if (ifmgd->assoc_data) 8487 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8488 if (ifmgd->auth_data) 8489 ieee80211_destroy_auth_data(sdata, false); 8490 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 8491 IEEE80211_DEAUTH_FRAME_LEN, 8492 false); 8493 } 8494 8495 /* This is a bit of a hack - we should find a better and more generic 8496 * solution to this. Normally when suspending, cfg80211 will in fact 8497 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 8498 * auth (not so important) or assoc (this is the problem) process. 8499 * 8500 * As a consequence, it can happen that we are in the process of both 8501 * associating and suspending, and receive an association response 8502 * after cfg80211 has checked if it needs to disconnect, but before 8503 * we actually set the flag to drop incoming frames. This will then 8504 * cause the workqueue flush to process the association response in 8505 * the suspend, resulting in a successful association just before it 8506 * tries to remove the interface from the driver, which now though 8507 * has a channel context assigned ... this results in issues. 8508 * 8509 * To work around this (for now) simply deauth here again if we're 8510 * now connected. 8511 */ 8512 if (ifmgd->associated && !sdata->local->wowlan) { 8513 u8 bssid[ETH_ALEN]; 8514 struct cfg80211_deauth_request req = { 8515 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 8516 .bssid = bssid, 8517 }; 8518 8519 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8520 ieee80211_mgd_deauth(sdata, &req); 8521 } 8522 } 8523 #endif 8524 8525 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8526 { 8527 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8528 8529 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8530 8531 if (!ifmgd->associated) 8532 return; 8533 8534 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8535 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8536 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8537 ieee80211_sta_connection_lost(sdata, 8538 WLAN_REASON_UNSPECIFIED, 8539 true); 8540 return; 8541 } 8542 8543 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8544 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8545 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8546 ieee80211_sta_connection_lost(sdata, 8547 WLAN_REASON_UNSPECIFIED, 8548 true); 8549 return; 8550 } 8551 } 8552 8553 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8554 struct wiphy_work *work) 8555 { 8556 struct ieee80211_link_data *link = 8557 container_of(work, struct ieee80211_link_data, 8558 u.mgd.request_smps_work); 8559 8560 __ieee80211_request_smps_mgd(link->sdata, link, 8561 link->u.mgd.driver_smps_mode); 8562 } 8563 8564 static void ieee80211_ml_sta_reconf_timeout(struct wiphy *wiphy, 8565 struct wiphy_work *work) 8566 { 8567 struct ieee80211_sub_if_data *sdata = 8568 container_of(work, struct ieee80211_sub_if_data, 8569 u.mgd.reconf.wk.work); 8570 8571 if (!sdata->u.mgd.reconf.added_links && 8572 !sdata->u.mgd.reconf.removed_links) 8573 return; 8574 8575 sdata_info(sdata, 8576 "mlo: reconf: timeout: added=0x%x, removed=0x%x\n", 8577 sdata->u.mgd.reconf.added_links, 8578 sdata->u.mgd.reconf.removed_links); 8579 8580 __ieee80211_disconnect(sdata); 8581 } 8582 8583 /* interface setup */ 8584 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8585 { 8586 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8587 8588 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8589 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8590 ieee80211_beacon_connection_loss_work); 8591 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8592 ieee80211_csa_connection_drop_work); 8593 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8594 ieee80211_tdls_peer_del_work); 8595 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8596 ieee80211_ml_reconf_work); 8597 wiphy_delayed_work_init(&ifmgd->reconf.wk, 8598 ieee80211_ml_sta_reconf_timeout); 8599 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8600 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8601 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8602 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8603 ieee80211_sta_handle_tspec_ac_params_wk); 8604 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8605 ieee80211_tid_to_link_map_work); 8606 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8607 ieee80211_neg_ttlm_timeout_work); 8608 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8609 ieee80211_teardown_ttlm_work); 8610 8611 ifmgd->flags = 0; 8612 ifmgd->powersave = sdata->wdev.ps; 8613 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8614 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8615 /* Setup TDLS data */ 8616 spin_lock_init(&ifmgd->teardown_lock); 8617 ifmgd->teardown_skb = NULL; 8618 ifmgd->orig_teardown_skb = NULL; 8619 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8620 } 8621 8622 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8623 struct wiphy_work *work) 8624 { 8625 struct ieee80211_link_data *link = 8626 container_of(work, struct ieee80211_link_data, 8627 u.mgd.recalc_smps); 8628 8629 ieee80211_recalc_smps(link->sdata, link); 8630 } 8631 8632 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8633 { 8634 struct ieee80211_sub_if_data *sdata = link->sdata; 8635 struct ieee80211_local *local = sdata->local; 8636 unsigned int link_id = link->link_id; 8637 8638 link->u.mgd.p2p_noa_index = -1; 8639 link->conf->bssid = link->u.mgd.bssid; 8640 link->smps_mode = IEEE80211_SMPS_OFF; 8641 8642 wiphy_work_init(&link->u.mgd.request_smps_work, 8643 ieee80211_request_smps_mgd_work); 8644 wiphy_work_init(&link->u.mgd.recalc_smps, 8645 ieee80211_recalc_smps_work); 8646 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8647 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8648 else 8649 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8650 8651 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8652 ieee80211_csa_switch_work); 8653 8654 ieee80211_clear_tpe(&link->conf->tpe); 8655 8656 if (sdata->u.mgd.assoc_data) 8657 ether_addr_copy(link->conf->addr, 8658 sdata->u.mgd.assoc_data->link[link_id].addr); 8659 else if (sdata->u.mgd.reconf.add_links_data) 8660 ether_addr_copy(link->conf->addr, 8661 sdata->u.mgd.reconf.add_links_data->link[link_id].addr); 8662 else if (!is_valid_ether_addr(link->conf->addr)) 8663 eth_random_addr(link->conf->addr); 8664 } 8665 8666 /* scan finished notification */ 8667 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8668 { 8669 struct ieee80211_sub_if_data *sdata; 8670 8671 /* Restart STA timers */ 8672 rcu_read_lock(); 8673 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8674 if (ieee80211_sdata_running(sdata)) 8675 ieee80211_restart_sta_timer(sdata); 8676 } 8677 rcu_read_unlock(); 8678 } 8679 8680 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8681 struct cfg80211_bss *cbss, s8 link_id, 8682 const u8 *ap_mld_addr, bool assoc, 8683 struct ieee80211_conn_settings *conn, 8684 bool override, 8685 unsigned long *userspace_selectors) 8686 { 8687 struct ieee80211_local *local = sdata->local; 8688 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8689 struct ieee80211_bss *bss = (void *)cbss->priv; 8690 struct sta_info *new_sta = NULL; 8691 struct ieee80211_link_data *link; 8692 bool have_sta = false; 8693 bool mlo; 8694 int err; 8695 8696 if (link_id >= 0) { 8697 mlo = true; 8698 if (WARN_ON(!ap_mld_addr)) 8699 return -EINVAL; 8700 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8701 } else { 8702 if (WARN_ON(ap_mld_addr)) 8703 return -EINVAL; 8704 ap_mld_addr = cbss->bssid; 8705 err = ieee80211_vif_set_links(sdata, 0, 0); 8706 link_id = 0; 8707 mlo = false; 8708 } 8709 8710 if (err) 8711 return err; 8712 8713 link = sdata_dereference(sdata->link[link_id], sdata); 8714 if (WARN_ON(!link)) { 8715 err = -ENOLINK; 8716 goto out_err; 8717 } 8718 8719 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8720 err = -EINVAL; 8721 goto out_err; 8722 } 8723 8724 /* If a reconfig is happening, bail out */ 8725 if (local->in_reconfig) { 8726 err = -EBUSY; 8727 goto out_err; 8728 } 8729 8730 if (assoc) { 8731 rcu_read_lock(); 8732 have_sta = sta_info_get(sdata, ap_mld_addr); 8733 rcu_read_unlock(); 8734 } 8735 8736 if (!have_sta) { 8737 if (mlo) 8738 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8739 link_id, cbss->bssid, 8740 GFP_KERNEL); 8741 else 8742 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8743 8744 if (!new_sta) { 8745 err = -ENOMEM; 8746 goto out_err; 8747 } 8748 8749 new_sta->sta.mlo = mlo; 8750 } 8751 8752 /* 8753 * Set up the information for the new channel before setting the 8754 * new channel. We can't - completely race-free - change the basic 8755 * rates bitmap and the channel (sband) that it refers to, but if 8756 * we set it up before we at least avoid calling into the driver's 8757 * bss_info_changed() method with invalid information (since we do 8758 * call that from changing the channel - only for IDLE and perhaps 8759 * some others, but ...). 8760 * 8761 * So to avoid that, just set up all the new information before the 8762 * channel, but tell the driver to apply it only afterwards, since 8763 * it might need the new channel for that. 8764 */ 8765 if (new_sta) { 8766 const struct cfg80211_bss_ies *ies; 8767 struct link_sta_info *link_sta; 8768 8769 rcu_read_lock(); 8770 link_sta = rcu_dereference(new_sta->link[link_id]); 8771 if (WARN_ON(!link_sta)) { 8772 rcu_read_unlock(); 8773 sta_info_free(local, new_sta); 8774 err = -EINVAL; 8775 goto out_err; 8776 } 8777 8778 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8779 link_sta, cbss); 8780 if (err) { 8781 rcu_read_unlock(); 8782 sta_info_free(local, new_sta); 8783 goto out_err; 8784 } 8785 8786 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8787 8788 /* set timing information */ 8789 link->conf->beacon_int = cbss->beacon_interval; 8790 ies = rcu_dereference(cbss->beacon_ies); 8791 if (ies) { 8792 link->conf->sync_tsf = ies->tsf; 8793 link->conf->sync_device_ts = 8794 bss->device_ts_beacon; 8795 8796 ieee80211_get_dtim(ies, 8797 &link->conf->sync_dtim_count, 8798 NULL); 8799 } else if (!ieee80211_hw_check(&sdata->local->hw, 8800 TIMING_BEACON_ONLY)) { 8801 ies = rcu_dereference(cbss->proberesp_ies); 8802 /* must be non-NULL since beacon IEs were NULL */ 8803 link->conf->sync_tsf = ies->tsf; 8804 link->conf->sync_device_ts = 8805 bss->device_ts_presp; 8806 link->conf->sync_dtim_count = 0; 8807 } else { 8808 link->conf->sync_tsf = 0; 8809 link->conf->sync_device_ts = 0; 8810 link->conf->sync_dtim_count = 0; 8811 } 8812 rcu_read_unlock(); 8813 } 8814 8815 if (new_sta || override) { 8816 /* 8817 * Only set this if we're also going to calculate the AP 8818 * settings etc., otherwise this was set before in a 8819 * previous call. Note override is set to %true in assoc 8820 * if the settings were changed. 8821 */ 8822 link->u.mgd.conn = *conn; 8823 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8824 mlo, &link->u.mgd.conn, 8825 userspace_selectors); 8826 if (err) { 8827 if (new_sta) 8828 sta_info_free(local, new_sta); 8829 goto out_err; 8830 } 8831 /* pass out for use in assoc */ 8832 *conn = link->u.mgd.conn; 8833 } 8834 8835 if (new_sta) { 8836 /* 8837 * tell driver about BSSID, basic rates and timing 8838 * this was set up above, before setting the channel 8839 */ 8840 ieee80211_link_info_change_notify(sdata, link, 8841 BSS_CHANGED_BSSID | 8842 BSS_CHANGED_BASIC_RATES | 8843 BSS_CHANGED_BEACON_INT); 8844 8845 if (assoc) 8846 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8847 8848 err = sta_info_insert(new_sta); 8849 new_sta = NULL; 8850 if (err) { 8851 sdata_info(sdata, 8852 "failed to insert STA entry for the AP (error %d)\n", 8853 err); 8854 goto out_release_chan; 8855 } 8856 } else 8857 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8858 8859 /* Cancel scan to ensure that nothing interferes with connection */ 8860 if (local->scanning) 8861 ieee80211_scan_cancel(local); 8862 8863 return 0; 8864 8865 out_release_chan: 8866 ieee80211_link_release_channel(link); 8867 out_err: 8868 ieee80211_vif_set_links(sdata, 0, 0); 8869 return err; 8870 } 8871 8872 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8873 const struct cfg80211_bss_ies *ies, 8874 u8 cur_channel, bool ignore_ecsa) 8875 { 8876 const struct element *csa_elem, *ecsa_elem; 8877 struct ieee80211_channel_sw_ie *csa = NULL; 8878 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8879 8880 if (!ies) 8881 return false; 8882 8883 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8884 ies->data, ies->len); 8885 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8886 csa = (void *)csa_elem->data; 8887 8888 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8889 ies->data, ies->len); 8890 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8891 ecsa = (void *)ecsa_elem->data; 8892 8893 if (csa && csa->count == 0) 8894 csa = NULL; 8895 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8896 csa = NULL; 8897 8898 if (ecsa && ecsa->count == 0) 8899 ecsa = NULL; 8900 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8901 ecsa = NULL; 8902 8903 if (ignore_ecsa && ecsa) { 8904 sdata_info(sdata, 8905 "Ignoring ECSA in probe response - was considered stuck!\n"); 8906 return csa; 8907 } 8908 8909 return csa || ecsa; 8910 } 8911 8912 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8913 struct cfg80211_bss *bss) 8914 { 8915 u8 cur_channel; 8916 bool ret; 8917 8918 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8919 8920 rcu_read_lock(); 8921 if (ieee80211_mgd_csa_present(sdata, 8922 rcu_dereference(bss->beacon_ies), 8923 cur_channel, false)) { 8924 ret = true; 8925 goto out; 8926 } 8927 8928 if (ieee80211_mgd_csa_present(sdata, 8929 rcu_dereference(bss->proberesp_ies), 8930 cur_channel, bss->proberesp_ecsa_stuck)) { 8931 ret = true; 8932 goto out; 8933 } 8934 8935 ret = false; 8936 out: 8937 rcu_read_unlock(); 8938 return ret; 8939 } 8940 8941 static void ieee80211_parse_cfg_selectors(unsigned long *userspace_selectors, 8942 const u8 *supported_selectors, 8943 u8 supported_selectors_len) 8944 { 8945 if (supported_selectors) { 8946 for (int i = 0; i < supported_selectors_len; i++) { 8947 set_bit(supported_selectors[i], 8948 userspace_selectors); 8949 } 8950 } else { 8951 /* Assume SAE_H2E support for backward compatibility. */ 8952 set_bit(BSS_MEMBERSHIP_SELECTOR_SAE_H2E, 8953 userspace_selectors); 8954 } 8955 } 8956 8957 /* config hooks */ 8958 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8959 struct cfg80211_auth_request *req) 8960 { 8961 struct ieee80211_local *local = sdata->local; 8962 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8963 struct ieee80211_mgd_auth_data *auth_data; 8964 struct ieee80211_conn_settings conn; 8965 struct ieee80211_link_data *link; 8966 struct ieee80211_supported_band *sband; 8967 struct ieee80211_bss *bss; 8968 u16 auth_alg; 8969 int err; 8970 bool cont_auth, wmm_used; 8971 8972 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8973 8974 /* prepare auth data structure */ 8975 8976 switch (req->auth_type) { 8977 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8978 auth_alg = WLAN_AUTH_OPEN; 8979 break; 8980 case NL80211_AUTHTYPE_SHARED_KEY: 8981 if (fips_enabled) 8982 return -EOPNOTSUPP; 8983 auth_alg = WLAN_AUTH_SHARED_KEY; 8984 break; 8985 case NL80211_AUTHTYPE_FT: 8986 auth_alg = WLAN_AUTH_FT; 8987 break; 8988 case NL80211_AUTHTYPE_NETWORK_EAP: 8989 auth_alg = WLAN_AUTH_LEAP; 8990 break; 8991 case NL80211_AUTHTYPE_SAE: 8992 auth_alg = WLAN_AUTH_SAE; 8993 break; 8994 case NL80211_AUTHTYPE_FILS_SK: 8995 auth_alg = WLAN_AUTH_FILS_SK; 8996 break; 8997 case NL80211_AUTHTYPE_FILS_SK_PFS: 8998 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8999 break; 9000 case NL80211_AUTHTYPE_FILS_PK: 9001 auth_alg = WLAN_AUTH_FILS_PK; 9002 break; 9003 default: 9004 return -EOPNOTSUPP; 9005 } 9006 9007 if (ifmgd->assoc_data) 9008 return -EBUSY; 9009 9010 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 9011 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 9012 return -EINVAL; 9013 } 9014 9015 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 9016 req->ie_len, GFP_KERNEL); 9017 if (!auth_data) 9018 return -ENOMEM; 9019 9020 memcpy(auth_data->ap_addr, 9021 req->ap_mld_addr ?: req->bss->bssid, 9022 ETH_ALEN); 9023 auth_data->bss = req->bss; 9024 auth_data->link_id = req->link_id; 9025 9026 if (req->auth_data_len >= 4) { 9027 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 9028 __le16 *pos = (__le16 *) req->auth_data; 9029 9030 auth_data->sae_trans = le16_to_cpu(pos[0]); 9031 auth_data->sae_status = le16_to_cpu(pos[1]); 9032 } 9033 memcpy(auth_data->data, req->auth_data + 4, 9034 req->auth_data_len - 4); 9035 auth_data->data_len += req->auth_data_len - 4; 9036 } 9037 9038 /* Check if continuing authentication or trying to authenticate with the 9039 * same BSS that we were in the process of authenticating with and avoid 9040 * removal and re-addition of the STA entry in 9041 * ieee80211_prep_connection(). 9042 */ 9043 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 9044 ifmgd->auth_data->link_id == req->link_id; 9045 9046 if (req->ie && req->ie_len) { 9047 memcpy(&auth_data->data[auth_data->data_len], 9048 req->ie, req->ie_len); 9049 auth_data->data_len += req->ie_len; 9050 } 9051 9052 if (req->key && req->key_len) { 9053 auth_data->key_len = req->key_len; 9054 auth_data->key_idx = req->key_idx; 9055 memcpy(auth_data->key, req->key, req->key_len); 9056 } 9057 9058 ieee80211_parse_cfg_selectors(auth_data->userspace_selectors, 9059 req->supported_selectors, 9060 req->supported_selectors_len); 9061 9062 auth_data->algorithm = auth_alg; 9063 9064 /* try to authenticate/probe */ 9065 9066 if (ifmgd->auth_data) { 9067 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 9068 auth_data->peer_confirmed = 9069 ifmgd->auth_data->peer_confirmed; 9070 } 9071 ieee80211_destroy_auth_data(sdata, cont_auth); 9072 } 9073 9074 /* prep auth_data so we don't go into idle on disassoc */ 9075 ifmgd->auth_data = auth_data; 9076 9077 /* If this is continuation of an ongoing SAE authentication exchange 9078 * (i.e., request to send SAE Confirm) and the peer has already 9079 * confirmed, mark authentication completed since we are about to send 9080 * out SAE Confirm. 9081 */ 9082 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 9083 auth_data->peer_confirmed && auth_data->sae_trans == 2) 9084 ieee80211_mark_sta_auth(sdata); 9085 9086 if (ifmgd->associated) { 9087 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9088 9089 sdata_info(sdata, 9090 "disconnect from AP %pM for new auth to %pM\n", 9091 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 9092 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9093 WLAN_REASON_UNSPECIFIED, 9094 false, frame_buf); 9095 9096 ieee80211_report_disconnect(sdata, frame_buf, 9097 sizeof(frame_buf), true, 9098 WLAN_REASON_UNSPECIFIED, 9099 false); 9100 } 9101 9102 /* needed for transmitting the auth frame(s) properly */ 9103 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 9104 9105 bss = (void *)req->bss->priv; 9106 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 9107 9108 sband = local->hw.wiphy->bands[req->bss->channel->band]; 9109 9110 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 9111 &conn); 9112 9113 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 9114 req->ap_mld_addr, cont_auth, 9115 &conn, false, 9116 auth_data->userspace_selectors); 9117 if (err) 9118 goto err_clear; 9119 9120 if (req->link_id >= 0) 9121 link = sdata_dereference(sdata->link[req->link_id], sdata); 9122 else 9123 link = &sdata->deflink; 9124 9125 if (WARN_ON(!link)) { 9126 err = -ENOLINK; 9127 goto err_clear; 9128 } 9129 9130 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 9131 auth_data->ap_addr, link->conf->addr); 9132 9133 err = ieee80211_auth(sdata); 9134 if (err) { 9135 sta_info_destroy_addr(sdata, auth_data->ap_addr); 9136 goto err_clear; 9137 } 9138 9139 /* hold our own reference */ 9140 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 9141 return 0; 9142 9143 err_clear: 9144 if (!ieee80211_vif_is_mld(&sdata->vif)) { 9145 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9146 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9147 BSS_CHANGED_BSSID); 9148 ieee80211_link_release_channel(&sdata->deflink); 9149 } 9150 ifmgd->auth_data = NULL; 9151 kfree(auth_data); 9152 return err; 9153 } 9154 9155 static void 9156 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 9157 struct ieee80211_mgd_assoc_data *assoc_data, 9158 struct cfg80211_assoc_request *req, 9159 struct ieee80211_conn_settings *conn, 9160 unsigned int link_id) 9161 { 9162 struct ieee80211_local *local = sdata->local; 9163 const struct cfg80211_bss_ies *bss_ies; 9164 struct ieee80211_supported_band *sband; 9165 struct ieee80211_link_data *link; 9166 struct cfg80211_bss *cbss; 9167 struct ieee80211_bss *bss; 9168 9169 cbss = assoc_data->link[link_id].bss; 9170 if (WARN_ON(!cbss)) 9171 return; 9172 9173 bss = (void *)cbss->priv; 9174 9175 sband = local->hw.wiphy->bands[cbss->channel->band]; 9176 if (WARN_ON(!sband)) 9177 return; 9178 9179 link = sdata_dereference(sdata->link[link_id], sdata); 9180 if (WARN_ON(!link)) 9181 return; 9182 9183 /* for MLO connections assume advertising all rates is OK */ 9184 if (!req->ap_mld_addr) { 9185 assoc_data->supp_rates = bss->supp_rates; 9186 assoc_data->supp_rates_len = bss->supp_rates_len; 9187 } 9188 9189 /* copy and link elems for the STA profile */ 9190 if (req->links[link_id].elems_len) { 9191 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 9192 req->links[link_id].elems_len); 9193 assoc_data->link[link_id].elems = assoc_data->ie_pos; 9194 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 9195 assoc_data->ie_pos += req->links[link_id].elems_len; 9196 } 9197 9198 link->u.mgd.beacon_crc_valid = false; 9199 link->u.mgd.dtim_period = 0; 9200 link->u.mgd.have_beacon = false; 9201 9202 /* override HT configuration only if the AP and we support it */ 9203 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 9204 struct ieee80211_sta_ht_cap sta_ht_cap; 9205 9206 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 9207 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 9208 } 9209 9210 rcu_read_lock(); 9211 bss_ies = rcu_dereference(cbss->beacon_ies); 9212 if (bss_ies) { 9213 u8 dtim_count = 0; 9214 9215 ieee80211_get_dtim(bss_ies, &dtim_count, 9216 &link->u.mgd.dtim_period); 9217 9218 sdata->deflink.u.mgd.have_beacon = true; 9219 9220 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 9221 link->conf->sync_tsf = bss_ies->tsf; 9222 link->conf->sync_device_ts = bss->device_ts_beacon; 9223 link->conf->sync_dtim_count = dtim_count; 9224 } 9225 } else { 9226 bss_ies = rcu_dereference(cbss->ies); 9227 } 9228 9229 if (bss_ies) { 9230 const struct element *elem; 9231 9232 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 9233 bss_ies->data, bss_ies->len); 9234 if (elem && elem->datalen >= 3) 9235 link->conf->profile_periodicity = elem->data[2]; 9236 else 9237 link->conf->profile_periodicity = 0; 9238 9239 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 9240 bss_ies->data, bss_ies->len); 9241 if (elem && elem->datalen >= 11 && 9242 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 9243 link->conf->ema_ap = true; 9244 else 9245 link->conf->ema_ap = false; 9246 } 9247 rcu_read_unlock(); 9248 9249 if (bss->corrupt_data) { 9250 char *corrupt_type = "data"; 9251 9252 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 9253 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 9254 corrupt_type = "beacon and probe response"; 9255 else 9256 corrupt_type = "beacon"; 9257 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 9258 corrupt_type = "probe response"; 9259 } 9260 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 9261 cbss->bssid, corrupt_type); 9262 } 9263 9264 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 9265 if (sdata->u.mgd.powersave) 9266 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 9267 else 9268 link->smps_mode = IEEE80211_SMPS_OFF; 9269 } else { 9270 link->smps_mode = link->u.mgd.req_smps; 9271 } 9272 } 9273 9274 static int 9275 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 9276 struct ieee80211_mgd_assoc_data *assoc_data, 9277 int link_id) 9278 { 9279 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 9280 enum nl80211_band band = cbss->channel->band; 9281 struct ieee80211_supported_band *sband; 9282 const struct element *elem; 9283 int err; 9284 9285 /* neither HT nor VHT elements used on 6 GHz */ 9286 if (band == NL80211_BAND_6GHZ) 9287 return 0; 9288 9289 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 9290 return 0; 9291 9292 rcu_read_lock(); 9293 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 9294 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 9295 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 9296 cbss->bssid); 9297 err = -EINVAL; 9298 goto out_rcu; 9299 } 9300 assoc_data->link[link_id].ap_ht_param = 9301 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 9302 rcu_read_unlock(); 9303 9304 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 9305 return 0; 9306 9307 /* some drivers want to support VHT on 2.4 GHz even */ 9308 sband = sdata->local->hw.wiphy->bands[band]; 9309 if (!sband->vht_cap.vht_supported) 9310 return 0; 9311 9312 rcu_read_lock(); 9313 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 9314 /* but even then accept it not being present on the AP */ 9315 if (!elem && band == NL80211_BAND_2GHZ) { 9316 err = 0; 9317 goto out_rcu; 9318 } 9319 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 9320 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 9321 cbss->bssid); 9322 err = -EINVAL; 9323 goto out_rcu; 9324 } 9325 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 9326 sizeof(struct ieee80211_vht_cap)); 9327 rcu_read_unlock(); 9328 9329 return 0; 9330 out_rcu: 9331 rcu_read_unlock(); 9332 return err; 9333 } 9334 9335 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 9336 struct cfg80211_assoc_request *req) 9337 { 9338 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 9339 struct ieee80211_local *local = sdata->local; 9340 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9341 struct ieee80211_mgd_assoc_data *assoc_data; 9342 const struct element *ssid_elem; 9343 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 9344 struct ieee80211_link_data *link; 9345 struct cfg80211_bss *cbss; 9346 bool override, uapsd_supported; 9347 bool match_auth; 9348 int i, err; 9349 size_t size = sizeof(*assoc_data) + req->ie_len; 9350 9351 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 9352 size += req->links[i].elems_len; 9353 9354 /* FIXME: no support for 4-addr MLO yet */ 9355 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 9356 return -EOPNOTSUPP; 9357 9358 assoc_data = kzalloc(size, GFP_KERNEL); 9359 if (!assoc_data) 9360 return -ENOMEM; 9361 9362 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 9363 9364 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 9365 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 9366 err = -EINVAL; 9367 goto err_free; 9368 } 9369 9370 rcu_read_lock(); 9371 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 9372 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 9373 rcu_read_unlock(); 9374 err = -EINVAL; 9375 goto err_free; 9376 } 9377 9378 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 9379 assoc_data->ssid_len = ssid_elem->datalen; 9380 rcu_read_unlock(); 9381 9382 if (req->ap_mld_addr) 9383 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 9384 else 9385 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 9386 9387 assoc_data->ext_mld_capa_ops = cpu_to_le16(req->ext_mld_capa_ops); 9388 9389 if (ifmgd->associated) { 9390 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9391 9392 sdata_info(sdata, 9393 "disconnect from AP %pM for new assoc to %pM\n", 9394 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 9395 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9396 WLAN_REASON_UNSPECIFIED, 9397 false, frame_buf); 9398 9399 ieee80211_report_disconnect(sdata, frame_buf, 9400 sizeof(frame_buf), true, 9401 WLAN_REASON_UNSPECIFIED, 9402 false); 9403 } 9404 9405 memset(sdata->u.mgd.userspace_selectors, 0, 9406 sizeof(sdata->u.mgd.userspace_selectors)); 9407 ieee80211_parse_cfg_selectors(sdata->u.mgd.userspace_selectors, 9408 req->supported_selectors, 9409 req->supported_selectors_len); 9410 9411 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 9412 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 9413 sizeof(ifmgd->ht_capa_mask)); 9414 9415 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 9416 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 9417 sizeof(ifmgd->vht_capa_mask)); 9418 9419 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 9420 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 9421 sizeof(ifmgd->s1g_capa_mask)); 9422 9423 /* keep some setup (AP STA, channel, ...) if matching */ 9424 match_auth = ifmgd->auth_data && 9425 ether_addr_equal(ifmgd->auth_data->ap_addr, 9426 assoc_data->ap_addr) && 9427 ifmgd->auth_data->link_id == req->link_id; 9428 9429 if (req->ap_mld_addr) { 9430 uapsd_supported = true; 9431 9432 if (req->flags & (ASSOC_REQ_DISABLE_HT | 9433 ASSOC_REQ_DISABLE_VHT | 9434 ASSOC_REQ_DISABLE_HE | 9435 ASSOC_REQ_DISABLE_EHT)) { 9436 err = -EINVAL; 9437 goto err_free; 9438 } 9439 9440 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 9441 struct ieee80211_supported_band *sband; 9442 struct cfg80211_bss *link_cbss = req->links[i].bss; 9443 struct ieee80211_bss *bss; 9444 9445 if (!link_cbss) 9446 continue; 9447 9448 bss = (void *)link_cbss->priv; 9449 9450 if (!bss->wmm_used) { 9451 err = -EINVAL; 9452 req->links[i].error = err; 9453 goto err_free; 9454 } 9455 9456 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 9457 err = -EINVAL; 9458 req->links[i].error = err; 9459 goto err_free; 9460 } 9461 9462 link = sdata_dereference(sdata->link[i], sdata); 9463 if (link) 9464 ether_addr_copy(assoc_data->link[i].addr, 9465 link->conf->addr); 9466 else 9467 eth_random_addr(assoc_data->link[i].addr); 9468 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 9469 9470 if (match_auth && i == assoc_link_id && link) 9471 assoc_data->link[i].conn = link->u.mgd.conn; 9472 else 9473 assoc_data->link[i].conn = 9474 ieee80211_conn_settings_unlimited; 9475 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 9476 req, true, i, 9477 &assoc_data->link[i].conn); 9478 assoc_data->link[i].bss = link_cbss; 9479 assoc_data->link[i].disabled = req->links[i].disabled; 9480 9481 if (!bss->uapsd_supported) 9482 uapsd_supported = false; 9483 9484 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 9485 err = -EINVAL; 9486 req->links[i].error = err; 9487 goto err_free; 9488 } 9489 9490 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 9491 assoc_data, i); 9492 if (err) { 9493 err = -EINVAL; 9494 req->links[i].error = err; 9495 goto err_free; 9496 } 9497 } 9498 9499 assoc_data->wmm = true; 9500 } else { 9501 struct ieee80211_supported_band *sband; 9502 struct ieee80211_bss *bss = (void *)cbss->priv; 9503 9504 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 9505 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 9506 9507 assoc_data->wmm = bss->wmm_used && 9508 (local->hw.queues >= IEEE80211_NUM_ACS); 9509 9510 if (cbss->channel->band == NL80211_BAND_6GHZ && 9511 req->flags & (ASSOC_REQ_DISABLE_HT | 9512 ASSOC_REQ_DISABLE_VHT | 9513 ASSOC_REQ_DISABLE_HE)) { 9514 err = -EINVAL; 9515 goto err_free; 9516 } 9517 9518 sband = local->hw.wiphy->bands[cbss->channel->band]; 9519 9520 assoc_data->link[0].bss = cbss; 9521 9522 if (match_auth) 9523 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 9524 else 9525 assoc_data->link[0].conn = 9526 ieee80211_conn_settings_unlimited; 9527 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 9528 assoc_data->wmm, 0, 9529 &assoc_data->link[0].conn); 9530 9531 uapsd_supported = bss->uapsd_supported; 9532 9533 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 9534 if (err) 9535 goto err_free; 9536 } 9537 9538 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 9539 9540 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 9541 err = -EBUSY; 9542 goto err_free; 9543 } 9544 9545 if (ifmgd->assoc_data) { 9546 err = -EBUSY; 9547 goto err_free; 9548 } 9549 9550 /* Cleanup is delayed if auth_data matches */ 9551 if (ifmgd->auth_data && !match_auth) 9552 ieee80211_destroy_auth_data(sdata, false); 9553 9554 if (req->ie && req->ie_len) { 9555 memcpy(assoc_data->ie, req->ie, req->ie_len); 9556 assoc_data->ie_len = req->ie_len; 9557 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 9558 } else { 9559 assoc_data->ie_pos = assoc_data->ie; 9560 } 9561 9562 if (req->fils_kek) { 9563 /* should already be checked in cfg80211 - so warn */ 9564 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 9565 err = -EINVAL; 9566 goto err_free; 9567 } 9568 memcpy(assoc_data->fils_kek, req->fils_kek, 9569 req->fils_kek_len); 9570 assoc_data->fils_kek_len = req->fils_kek_len; 9571 } 9572 9573 if (req->fils_nonces) 9574 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9575 2 * FILS_NONCE_LEN); 9576 9577 /* default timeout */ 9578 assoc_data->timeout = jiffies; 9579 assoc_data->timeout_started = true; 9580 9581 assoc_data->assoc_link_id = assoc_link_id; 9582 9583 if (req->ap_mld_addr) { 9584 /* if there was no authentication, set up the link */ 9585 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9586 if (err) 9587 goto err_clear; 9588 } 9589 9590 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9591 if (WARN_ON(!link)) { 9592 err = -EINVAL; 9593 goto err_clear; 9594 } 9595 9596 override = link->u.mgd.conn.mode != 9597 assoc_data->link[assoc_link_id].conn.mode || 9598 link->u.mgd.conn.bw_limit != 9599 assoc_data->link[assoc_link_id].conn.bw_limit; 9600 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9601 9602 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9603 assoc_link_id); 9604 9605 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9606 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9607 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9608 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9609 9610 if (assoc_data->wmm && uapsd_supported && 9611 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9612 assoc_data->uapsd = true; 9613 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9614 } else { 9615 assoc_data->uapsd = false; 9616 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9617 } 9618 9619 if (req->prev_bssid) 9620 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9621 9622 if (req->use_mfp) { 9623 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9624 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9625 } else { 9626 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9627 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9628 } 9629 9630 if (req->flags & ASSOC_REQ_USE_RRM) 9631 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9632 else 9633 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9634 9635 if (req->crypto.control_port) 9636 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9637 else 9638 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9639 9640 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9641 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9642 sdata->control_port_over_nl80211 = 9643 req->crypto.control_port_over_nl80211; 9644 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9645 9646 /* kick off associate process */ 9647 ifmgd->assoc_data = assoc_data; 9648 9649 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9650 if (!assoc_data->link[i].bss) 9651 continue; 9652 if (i == assoc_data->assoc_link_id) 9653 continue; 9654 /* only calculate the mode, hence link == NULL */ 9655 err = ieee80211_prep_channel(sdata, NULL, i, 9656 assoc_data->link[i].bss, true, 9657 &assoc_data->link[i].conn, 9658 sdata->u.mgd.userspace_selectors); 9659 if (err) { 9660 req->links[i].error = err; 9661 goto err_clear; 9662 } 9663 } 9664 9665 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9666 vif_cfg->ssid_len = assoc_data->ssid_len; 9667 9668 /* needed for transmitting the assoc frames properly */ 9669 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9670 9671 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9672 req->ap_mld_addr, true, 9673 &assoc_data->link[assoc_link_id].conn, 9674 override, 9675 sdata->u.mgd.userspace_selectors); 9676 if (err) 9677 goto err_clear; 9678 9679 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9680 const struct cfg80211_bss_ies *beacon_ies; 9681 9682 rcu_read_lock(); 9683 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9684 if (!beacon_ies) { 9685 /* 9686 * Wait up to one beacon interval ... 9687 * should this be more if we miss one? 9688 */ 9689 sdata_info(sdata, "waiting for beacon from %pM\n", 9690 link->u.mgd.bssid); 9691 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9692 assoc_data->timeout_started = true; 9693 assoc_data->need_beacon = true; 9694 } 9695 rcu_read_unlock(); 9696 } 9697 9698 run_again(sdata, assoc_data->timeout); 9699 9700 /* We are associating, clean up auth_data */ 9701 if (ifmgd->auth_data) 9702 ieee80211_destroy_auth_data(sdata, true); 9703 9704 return 0; 9705 err_clear: 9706 if (!ifmgd->auth_data) { 9707 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9708 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9709 BSS_CHANGED_BSSID); 9710 } 9711 ifmgd->assoc_data = NULL; 9712 err_free: 9713 kfree(assoc_data); 9714 return err; 9715 } 9716 9717 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9718 struct cfg80211_deauth_request *req) 9719 { 9720 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9721 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9722 bool tx = !req->local_state_change; 9723 struct ieee80211_prep_tx_info info = { 9724 .subtype = IEEE80211_STYPE_DEAUTH, 9725 }; 9726 9727 if (ifmgd->auth_data && 9728 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9729 sdata_info(sdata, 9730 "aborting authentication 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->auth_data->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_auth_data(sdata, false); 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->assoc_data && 9749 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9750 sdata_info(sdata, 9751 "aborting association with %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 info.link_id = ifmgd->assoc_data->assoc_link_id; 9756 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9757 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9758 IEEE80211_STYPE_DEAUTH, 9759 req->reason_code, tx, 9760 frame_buf); 9761 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9762 ieee80211_report_disconnect(sdata, frame_buf, 9763 sizeof(frame_buf), true, 9764 req->reason_code, false); 9765 drv_mgd_complete_tx(sdata->local, sdata, &info); 9766 return 0; 9767 } 9768 9769 if (ifmgd->associated && 9770 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9771 sdata_info(sdata, 9772 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9773 req->bssid, req->reason_code, 9774 ieee80211_get_reason_code_string(req->reason_code)); 9775 9776 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9777 req->reason_code, tx, frame_buf); 9778 ieee80211_report_disconnect(sdata, frame_buf, 9779 sizeof(frame_buf), true, 9780 req->reason_code, false); 9781 return 0; 9782 } 9783 9784 return -ENOTCONN; 9785 } 9786 9787 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9788 struct cfg80211_disassoc_request *req) 9789 { 9790 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9791 9792 if (!sdata->u.mgd.associated || 9793 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9794 return -ENOTCONN; 9795 9796 sdata_info(sdata, 9797 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9798 req->ap_addr, req->reason_code, 9799 ieee80211_get_reason_code_string(req->reason_code)); 9800 9801 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9802 req->reason_code, !req->local_state_change, 9803 frame_buf); 9804 9805 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9806 req->reason_code, false); 9807 9808 return 0; 9809 } 9810 9811 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9812 { 9813 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9814 &link->u.mgd.request_smps_work); 9815 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9816 &link->u.mgd.recalc_smps); 9817 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9818 &link->u.mgd.csa.switch_work); 9819 } 9820 9821 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9822 { 9823 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9824 9825 /* 9826 * Make sure some work items will not run after this, 9827 * they will not do anything but might not have been 9828 * cancelled when disconnecting. 9829 */ 9830 wiphy_work_cancel(sdata->local->hw.wiphy, 9831 &ifmgd->monitor_work); 9832 wiphy_work_cancel(sdata->local->hw.wiphy, 9833 &ifmgd->beacon_connection_loss_work); 9834 wiphy_work_cancel(sdata->local->hw.wiphy, 9835 &ifmgd->csa_connection_drop_work); 9836 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9837 &ifmgd->tdls_peer_del_work); 9838 9839 if (ifmgd->assoc_data) 9840 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9841 if (ifmgd->auth_data) 9842 ieee80211_destroy_auth_data(sdata, false); 9843 spin_lock_bh(&ifmgd->teardown_lock); 9844 if (ifmgd->teardown_skb) { 9845 kfree_skb(ifmgd->teardown_skb); 9846 ifmgd->teardown_skb = NULL; 9847 ifmgd->orig_teardown_skb = NULL; 9848 } 9849 kfree(ifmgd->assoc_req_ies); 9850 ifmgd->assoc_req_ies = NULL; 9851 ifmgd->assoc_req_ies_len = 0; 9852 spin_unlock_bh(&ifmgd->teardown_lock); 9853 timer_delete_sync(&ifmgd->timer); 9854 } 9855 9856 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9857 enum nl80211_cqm_rssi_threshold_event rssi_event, 9858 s32 rssi_level, 9859 gfp_t gfp) 9860 { 9861 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9862 9863 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9864 9865 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9866 } 9867 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9868 9869 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9870 { 9871 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9872 9873 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9874 9875 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9876 } 9877 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9878 9879 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9880 int rssi_min_thold, 9881 int rssi_max_thold) 9882 { 9883 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9884 9885 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9886 return; 9887 9888 /* 9889 * Scale up threshold values before storing it, as the RSSI averaging 9890 * algorithm uses a scaled up value as well. Change this scaling 9891 * factor if the RSSI averaging algorithm changes. 9892 */ 9893 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9894 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9895 } 9896 9897 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9898 int rssi_min_thold, 9899 int rssi_max_thold) 9900 { 9901 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9902 9903 WARN_ON(rssi_min_thold == rssi_max_thold || 9904 rssi_min_thold > rssi_max_thold); 9905 9906 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9907 rssi_max_thold); 9908 } 9909 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9910 9911 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9912 { 9913 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9914 9915 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9916 } 9917 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9918 9919 void ieee80211_process_ml_reconf_resp(struct ieee80211_sub_if_data *sdata, 9920 struct ieee80211_mgmt *mgmt, size_t len) 9921 { 9922 struct ieee80211_local *local = sdata->local; 9923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9924 struct ieee80211_mgd_assoc_data *add_links_data = 9925 ifmgd->reconf.add_links_data; 9926 struct sta_info *sta; 9927 struct cfg80211_mlo_reconf_done_data done_data = {}; 9928 u16 sta_changed_links = sdata->u.mgd.reconf.added_links | 9929 sdata->u.mgd.reconf.removed_links; 9930 u16 link_mask, valid_links; 9931 unsigned int link_id; 9932 size_t orig_len = len; 9933 u8 i, group_key_data_len; 9934 u8 *pos; 9935 9936 if (!ieee80211_vif_is_mld(&sdata->vif) || 9937 len < offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp) || 9938 mgmt->u.action.u.ml_reconf_resp.dialog_token != 9939 sdata->u.mgd.reconf.dialog_token || 9940 !sta_changed_links) 9941 return; 9942 9943 pos = mgmt->u.action.u.ml_reconf_resp.variable; 9944 len -= offsetofend(typeof(*mgmt), u.action.u.ml_reconf_resp); 9945 9946 /* each status duple is 3 octets */ 9947 if (len < mgmt->u.action.u.ml_reconf_resp.count * 3) { 9948 sdata_info(sdata, 9949 "mlo: reconf: unexpected len=%zu, count=%u\n", 9950 len, mgmt->u.action.u.ml_reconf_resp.count); 9951 goto disconnect; 9952 } 9953 9954 link_mask = sta_changed_links; 9955 for (i = 0; i < mgmt->u.action.u.ml_reconf_resp.count; i++) { 9956 u16 status = get_unaligned_le16(pos + 1); 9957 9958 link_id = *pos; 9959 9960 if (!(link_mask & BIT(link_id))) { 9961 sdata_info(sdata, 9962 "mlo: reconf: unexpected link: %u, changed=0x%x\n", 9963 link_id, sta_changed_links); 9964 goto disconnect; 9965 } 9966 9967 /* clear the corresponding link, to detect the case that 9968 * the same link was included more than one time 9969 */ 9970 link_mask &= ~BIT(link_id); 9971 9972 /* Handle failure to remove links here. Failure to remove added 9973 * links will be done later in the flow. 9974 */ 9975 if (status != WLAN_STATUS_SUCCESS) { 9976 sdata_info(sdata, 9977 "mlo: reconf: failed on link=%u, status=%u\n", 9978 link_id, status); 9979 9980 /* The AP MLD failed to remove a link that was already 9981 * removed locally. As this is not expected behavior, 9982 * disconnect 9983 */ 9984 if (sdata->u.mgd.reconf.removed_links & BIT(link_id)) 9985 goto disconnect; 9986 9987 /* The AP MLD failed to add a link. Remove it from the 9988 * added links. 9989 */ 9990 sdata->u.mgd.reconf.added_links &= ~BIT(link_id); 9991 } 9992 9993 pos += 3; 9994 len -= 3; 9995 } 9996 9997 if (link_mask) { 9998 sdata_info(sdata, 9999 "mlo: reconf: no response for links=0x%x\n", 10000 link_mask); 10001 goto disconnect; 10002 } 10003 10004 if (!sdata->u.mgd.reconf.added_links) 10005 goto out; 10006 10007 if (len < 1 || len < 1 + *pos) { 10008 sdata_info(sdata, 10009 "mlo: reconf: invalid group key data length"); 10010 goto disconnect; 10011 } 10012 10013 /* The Group Key Data field must be present when links are added. This 10014 * field should be processed by userland. 10015 */ 10016 group_key_data_len = *pos++; 10017 10018 pos += group_key_data_len; 10019 len -= group_key_data_len + 1; 10020 10021 /* Process the information for the added links */ 10022 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10023 if (WARN_ON(!sta)) 10024 goto disconnect; 10025 10026 valid_links = sdata->vif.valid_links; 10027 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10028 if (!add_links_data->link[link_id].bss || 10029 !(sdata->u.mgd.reconf.added_links & BIT(link_id))) 10030 10031 continue; 10032 10033 valid_links |= BIT(link_id); 10034 if (ieee80211_sta_allocate_link(sta, link_id)) 10035 goto disconnect; 10036 } 10037 10038 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10039 link_mask = 0; 10040 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10041 struct cfg80211_bss *cbss = add_links_data->link[link_id].bss; 10042 struct ieee80211_link_data *link; 10043 struct link_sta_info *link_sta; 10044 u64 changed = 0; 10045 10046 if (!cbss) 10047 continue; 10048 10049 link = sdata_dereference(sdata->link[link_id], sdata); 10050 if (WARN_ON(!link)) 10051 goto disconnect; 10052 10053 link_info(link, 10054 "mlo: reconf: local address %pM, AP link address %pM\n", 10055 add_links_data->link[link_id].addr, 10056 add_links_data->link[link_id].bss->bssid); 10057 10058 link_sta = rcu_dereference_protected(sta->link[link_id], 10059 lockdep_is_held(&local->hw.wiphy->mtx)); 10060 if (WARN_ON(!link_sta)) 10061 goto disconnect; 10062 10063 if (!link->u.mgd.have_beacon) { 10064 const struct cfg80211_bss_ies *ies; 10065 10066 rcu_read_lock(); 10067 ies = rcu_dereference(cbss->beacon_ies); 10068 if (ies) 10069 link->u.mgd.have_beacon = true; 10070 else 10071 ies = rcu_dereference(cbss->ies); 10072 ieee80211_get_dtim(ies, 10073 &link->conf->sync_dtim_count, 10074 &link->u.mgd.dtim_period); 10075 link->conf->beacon_int = cbss->beacon_interval; 10076 rcu_read_unlock(); 10077 } 10078 10079 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 10080 10081 link->u.mgd.conn = add_links_data->link[link_id].conn; 10082 if (ieee80211_prep_channel(sdata, link, link_id, cbss, 10083 true, &link->u.mgd.conn, 10084 sdata->u.mgd.userspace_selectors)) { 10085 link_info(link, "mlo: reconf: prep_channel failed\n"); 10086 goto disconnect; 10087 } 10088 10089 if (ieee80211_mgd_setup_link_sta(link, sta, link_sta, 10090 add_links_data->link[link_id].bss)) 10091 goto disconnect; 10092 10093 if (!ieee80211_assoc_config_link(link, link_sta, 10094 add_links_data->link[link_id].bss, 10095 mgmt, pos, len, 10096 &changed)) 10097 goto disconnect; 10098 10099 /* The AP MLD indicated success for this link, but the station 10100 * profile status indicated otherwise. Since there is an 10101 * inconsistency in the ML reconfiguration response, disconnect 10102 */ 10103 if (add_links_data->link[link_id].status != WLAN_STATUS_SUCCESS) 10104 goto disconnect; 10105 10106 ieee80211_sta_init_nss(link_sta); 10107 if (ieee80211_sta_activate_link(sta, link_id)) 10108 goto disconnect; 10109 10110 changed |= ieee80211_link_set_associated(link, cbss); 10111 ieee80211_link_info_change_notify(sdata, link, changed); 10112 10113 ieee80211_recalc_smps(sdata, link); 10114 link_mask |= BIT(link_id); 10115 } 10116 10117 sdata_info(sdata, 10118 "mlo: reconf: current valid_links=0x%x, added=0x%x\n", 10119 valid_links, link_mask); 10120 10121 /* links might have changed due to rejected ones, set them again */ 10122 ieee80211_vif_set_links(sdata, valid_links, sdata->vif.dormant_links); 10123 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 10124 10125 ieee80211_recalc_ps(local); 10126 ieee80211_recalc_ps_vif(sdata); 10127 10128 done_data.buf = (const u8 *)mgmt; 10129 done_data.len = orig_len; 10130 done_data.added_links = link_mask; 10131 10132 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10133 done_data.links[link_id].bss = add_links_data->link[link_id].bss; 10134 done_data.links[link_id].addr = 10135 add_links_data->link[link_id].addr; 10136 } 10137 10138 cfg80211_mlo_reconf_add_done(sdata->dev, &done_data); 10139 kfree(sdata->u.mgd.reconf.add_links_data); 10140 sdata->u.mgd.reconf.add_links_data = NULL; 10141 out: 10142 ieee80211_ml_reconf_reset(sdata); 10143 return; 10144 10145 disconnect: 10146 __ieee80211_disconnect(sdata); 10147 } 10148 10149 static struct sk_buff * 10150 ieee80211_build_ml_reconf_req(struct ieee80211_sub_if_data *sdata, 10151 struct ieee80211_mgd_assoc_data *add_links_data, 10152 u16 removed_links, __le16 ext_mld_capa_ops) 10153 { 10154 struct ieee80211_local *local = sdata->local; 10155 struct ieee80211_mgmt *mgmt; 10156 struct ieee80211_multi_link_elem *ml_elem; 10157 struct ieee80211_mle_basic_common_info *common; 10158 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 10159 struct sk_buff *skb; 10160 size_t size; 10161 unsigned int link_id; 10162 __le16 eml_capa = 0, mld_capa_ops = 0; 10163 struct ieee80211_tx_info *info; 10164 u8 common_size, var_common_size; 10165 u8 *ml_elem_len; 10166 u16 capab = 0; 10167 10168 size = local->hw.extra_tx_headroom + sizeof(*mgmt); 10169 10170 /* Consider the maximal length of the reconfiguration ML element */ 10171 size += sizeof(struct ieee80211_multi_link_elem); 10172 10173 /* The Basic ML element and the Reconfiguration ML element have the same 10174 * fixed common information fields in the context of ML reconfiguration 10175 * action frame. The AP MLD MAC address must always be present 10176 */ 10177 common_size = sizeof(*common); 10178 10179 /* when adding links, the MLD capabilities must be present */ 10180 var_common_size = 0; 10181 if (add_links_data) { 10182 const struct wiphy_iftype_ext_capab *ift_ext_capa = 10183 cfg80211_get_iftype_ext_capa(local->hw.wiphy, 10184 ieee80211_vif_type_p2p(&sdata->vif)); 10185 10186 if (ift_ext_capa) { 10187 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 10188 mld_capa_ops = 10189 cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 10190 } 10191 10192 /* MLD capabilities and operation */ 10193 var_common_size += 2; 10194 10195 /* EML capabilities */ 10196 if (eml_capa & cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10197 IEEE80211_EML_CAP_EMLMR_SUPPORT))) 10198 var_common_size += 2; 10199 } 10200 10201 if (ext_mld_capa_ops) 10202 var_common_size += 2; 10203 10204 /* Add the common information length */ 10205 size += common_size + var_common_size; 10206 10207 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10208 struct cfg80211_bss *cbss; 10209 size_t elems_len; 10210 10211 if (removed_links & BIT(link_id)) { 10212 size += sizeof(struct ieee80211_mle_per_sta_profile) + 10213 ETH_ALEN; 10214 continue; 10215 } 10216 10217 if (!add_links_data || !add_links_data->link[link_id].bss) 10218 continue; 10219 10220 elems_len = add_links_data->link[link_id].elems_len; 10221 cbss = add_links_data->link[link_id].bss; 10222 10223 /* should be the same across all BSSes */ 10224 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 10225 capab |= WLAN_CAPABILITY_PRIVACY; 10226 10227 size += 2 + sizeof(struct ieee80211_mle_per_sta_profile) + 10228 ETH_ALEN; 10229 10230 /* WMM */ 10231 size += 9; 10232 size += ieee80211_link_common_elems_size(sdata, iftype, cbss, 10233 elems_len); 10234 } 10235 10236 skb = alloc_skb(size, GFP_KERNEL); 10237 if (!skb) 10238 return NULL; 10239 10240 skb_reserve(skb, local->hw.extra_tx_headroom); 10241 mgmt = skb_put_zero(skb, offsetofend(struct ieee80211_mgmt, 10242 u.action.u.ml_reconf_req)); 10243 10244 /* Add the MAC header */ 10245 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10246 IEEE80211_STYPE_ACTION); 10247 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10248 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10249 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10250 10251 /* Add the action frame fixed fields */ 10252 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10253 mgmt->u.action.u.ml_reconf_req.action_code = 10254 WLAN_PROTECTED_EHT_ACTION_LINK_RECONFIG_REQ; 10255 10256 /* allocate a dialog token and store it */ 10257 sdata->u.mgd.reconf.dialog_token = ++sdata->u.mgd.dialog_token_alloc; 10258 mgmt->u.action.u.ml_reconf_req.dialog_token = 10259 sdata->u.mgd.reconf.dialog_token; 10260 10261 /* Add the ML reconfiguration element and the common information */ 10262 skb_put_u8(skb, WLAN_EID_EXTENSION); 10263 ml_elem_len = skb_put(skb, 1); 10264 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 10265 ml_elem = skb_put(skb, sizeof(*ml_elem)); 10266 ml_elem->control = 10267 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_RECONF | 10268 IEEE80211_MLC_RECONF_PRES_MLD_MAC_ADDR); 10269 common = skb_put(skb, common_size); 10270 common->len = common_size + var_common_size; 10271 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 10272 10273 if (add_links_data) { 10274 if (eml_capa & 10275 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 10276 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 10277 ml_elem->control |= 10278 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EML_CAPA); 10279 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 10280 } 10281 10282 ml_elem->control |= 10283 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_MLD_CAPA_OP); 10284 10285 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 10286 } 10287 10288 if (ext_mld_capa_ops) { 10289 ml_elem->control |= 10290 cpu_to_le16(IEEE80211_MLC_RECONF_PRES_EXT_MLD_CAPA_OP); 10291 skb_put_data(skb, &ext_mld_capa_ops, sizeof(ext_mld_capa_ops)); 10292 } 10293 10294 if (sdata->u.mgd.flags & IEEE80211_STA_ENABLE_RRM) 10295 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 10296 10297 /* Add the per station profile */ 10298 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10299 u8 *subelem_len = NULL; 10300 u16 ctrl; 10301 const u8 *addr; 10302 10303 /* Skip links that are not changing */ 10304 if (!(removed_links & BIT(link_id)) && 10305 (!add_links_data || !add_links_data->link[link_id].bss)) 10306 continue; 10307 10308 ctrl = link_id | 10309 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT; 10310 10311 if (removed_links & BIT(link_id)) { 10312 struct ieee80211_bss_conf *conf = 10313 sdata_dereference(sdata->vif.link_conf[link_id], 10314 sdata); 10315 if (!conf) 10316 continue; 10317 10318 addr = conf->addr; 10319 ctrl |= u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_DEL_LINK, 10320 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10321 } else { 10322 addr = add_links_data->link[link_id].addr; 10323 ctrl |= IEEE80211_MLE_STA_RECONF_CONTROL_COMPLETE_PROFILE | 10324 u16_encode_bits(IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE_ADD_LINK, 10325 IEEE80211_MLE_STA_RECONF_CONTROL_OPERATION_TYPE); 10326 } 10327 10328 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 10329 subelem_len = skb_put(skb, 1); 10330 10331 put_unaligned_le16(ctrl, skb_put(skb, sizeof(ctrl))); 10332 skb_put_u8(skb, 1 + ETH_ALEN); 10333 skb_put_data(skb, addr, ETH_ALEN); 10334 10335 if (!(removed_links & BIT(link_id))) { 10336 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 10337 size_t extra_used; 10338 void *capab_pos; 10339 u8 qos_info; 10340 10341 capab_pos = skb_put(skb, 2); 10342 10343 extra_used = 10344 ieee80211_add_link_elems(sdata, skb, &capab, NULL, 10345 add_links_data->link[link_id].elems, 10346 add_links_data->link[link_id].elems_len, 10347 link_id, NULL, 10348 link_present_elems, 10349 add_links_data); 10350 10351 if (add_links_data->link[link_id].elems) 10352 skb_put_data(skb, 10353 add_links_data->link[link_id].elems + 10354 extra_used, 10355 add_links_data->link[link_id].elems_len - 10356 extra_used); 10357 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED) { 10358 qos_info = sdata->u.mgd.uapsd_queues; 10359 qos_info |= (sdata->u.mgd.uapsd_max_sp_len << 10360 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 10361 } else { 10362 qos_info = 0; 10363 } 10364 10365 ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 10366 put_unaligned_le16(capab, capab_pos); 10367 } 10368 10369 ieee80211_fragment_element(skb, subelem_len, 10370 IEEE80211_MLE_SUBELEM_FRAGMENT); 10371 } 10372 10373 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 10374 10375 info = IEEE80211_SKB_CB(skb); 10376 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 10377 10378 return skb; 10379 } 10380 10381 int ieee80211_mgd_assoc_ml_reconf(struct ieee80211_sub_if_data *sdata, 10382 struct cfg80211_ml_reconf_req *req) 10383 { 10384 struct ieee80211_local *local = sdata->local; 10385 struct ieee80211_mgd_assoc_data *data = NULL; 10386 struct sta_info *sta; 10387 struct sk_buff *skb; 10388 u16 added_links, new_valid_links; 10389 int link_id, err; 10390 10391 if (!ieee80211_vif_is_mld(&sdata->vif) || 10392 !(sdata->vif.cfg.mld_capa_op & 10393 IEEE80211_MLD_CAP_OP_LINK_RECONF_SUPPORT)) 10394 return -EINVAL; 10395 10396 /* No support for concurrent ML reconfiguration operation */ 10397 if (sdata->u.mgd.reconf.added_links || 10398 sdata->u.mgd.reconf.removed_links) 10399 return -EBUSY; 10400 10401 added_links = 0; 10402 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 10403 if (!req->add_links[link_id].bss) 10404 continue; 10405 10406 added_links |= BIT(link_id); 10407 } 10408 10409 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 10410 if (WARN_ON(!sta)) 10411 return -ENOLINK; 10412 10413 /* Adding links to the set of valid link is done only after a successful 10414 * ML reconfiguration frame exchange. Here prepare the data for the ML 10415 * reconfiguration frame construction and allocate the required 10416 * resources 10417 */ 10418 if (added_links) { 10419 bool uapsd_supported; 10420 10421 data = kzalloc(sizeof(*data), GFP_KERNEL); 10422 if (!data) 10423 return -ENOMEM; 10424 10425 data->assoc_link_id = -1; 10426 data->wmm = true; 10427 10428 uapsd_supported = true; 10429 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10430 link_id++) { 10431 struct ieee80211_supported_band *sband; 10432 struct cfg80211_bss *link_cbss = 10433 req->add_links[link_id].bss; 10434 struct ieee80211_bss *bss; 10435 10436 if (!link_cbss) 10437 continue; 10438 10439 bss = (void *)link_cbss->priv; 10440 10441 if (!bss->wmm_used) { 10442 err = -EINVAL; 10443 goto err_free; 10444 } 10445 10446 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 10447 err = -EINVAL; 10448 goto err_free; 10449 } 10450 10451 eth_random_addr(data->link[link_id].addr); 10452 data->link[link_id].conn = 10453 ieee80211_conn_settings_unlimited; 10454 sband = 10455 local->hw.wiphy->bands[link_cbss->channel->band]; 10456 10457 ieee80211_determine_our_sta_mode(sdata, sband, 10458 NULL, true, link_id, 10459 &data->link[link_id].conn); 10460 10461 data->link[link_id].bss = link_cbss; 10462 data->link[link_id].disabled = 10463 req->add_links[link_id].disabled; 10464 data->link[link_id].elems = 10465 (u8 *)req->add_links[link_id].elems; 10466 data->link[link_id].elems_len = 10467 req->add_links[link_id].elems_len; 10468 10469 if (!bss->uapsd_supported) 10470 uapsd_supported = false; 10471 10472 if (data->link[link_id].conn.mode < 10473 IEEE80211_CONN_MODE_EHT) { 10474 err = -EINVAL; 10475 goto err_free; 10476 } 10477 10478 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, data, 10479 link_id); 10480 if (err) { 10481 err = -EINVAL; 10482 goto err_free; 10483 } 10484 } 10485 10486 /* Require U-APSD support if we enabled it */ 10487 if (sdata->u.mgd.flags & IEEE80211_STA_UAPSD_ENABLED && 10488 !uapsd_supported) { 10489 err = -EINVAL; 10490 sdata_info(sdata, "U-APSD on but not available on (all) new links\n"); 10491 goto err_free; 10492 } 10493 10494 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10495 link_id++) { 10496 if (!data->link[link_id].bss) 10497 continue; 10498 10499 /* only used to verify the mode, nothing is allocated */ 10500 err = ieee80211_prep_channel(sdata, NULL, link_id, 10501 data->link[link_id].bss, 10502 true, 10503 &data->link[link_id].conn, 10504 sdata->u.mgd.userspace_selectors); 10505 if (err) 10506 goto err_free; 10507 } 10508 } 10509 10510 /* link removal is done before the ML reconfiguration frame exchange so 10511 * that these links will not be used between their removal by the AP MLD 10512 * and before the station got the ML reconfiguration response. Based on 10513 * Section 35.3.6.4 in Draft P802.11be_D7.0 the AP MLD should accept the 10514 * link removal request. 10515 */ 10516 if (req->rem_links) { 10517 u16 new_active_links = 10518 sdata->vif.active_links & ~req->rem_links; 10519 10520 new_valid_links = sdata->vif.valid_links & ~req->rem_links; 10521 10522 /* Should not be left with no valid links to perform the 10523 * ML reconfiguration 10524 */ 10525 if (!new_valid_links || 10526 !(new_valid_links & ~sdata->vif.dormant_links)) { 10527 sdata_info(sdata, "mlo: reconf: no valid links\n"); 10528 err = -EINVAL; 10529 goto err_free; 10530 } 10531 10532 if (new_active_links != sdata->vif.active_links) { 10533 if (!new_active_links) 10534 new_active_links = 10535 BIT(__ffs(new_valid_links & 10536 ~sdata->vif.dormant_links)); 10537 10538 err = ieee80211_set_active_links(&sdata->vif, 10539 new_active_links); 10540 if (err) { 10541 sdata_info(sdata, 10542 "mlo: reconf: failed set active links\n"); 10543 goto err_free; 10544 } 10545 } 10546 } 10547 10548 /* Build the SKB before the link removal as the construction of the 10549 * station info for removed links requires the local address. 10550 * Invalidate the removed links, so that the transmission of the ML 10551 * reconfiguration request frame would not be done using them, as the AP 10552 * is expected to send the ML reconfiguration response frame on the link 10553 * on which the request was received. 10554 */ 10555 skb = ieee80211_build_ml_reconf_req(sdata, data, req->rem_links, 10556 cpu_to_le16(req->ext_mld_capa_ops)); 10557 if (!skb) { 10558 err = -ENOMEM; 10559 goto err_free; 10560 } 10561 10562 if (req->rem_links) { 10563 u16 new_dormant_links = 10564 sdata->vif.dormant_links & ~req->rem_links; 10565 10566 err = ieee80211_vif_set_links(sdata, new_valid_links, 10567 new_dormant_links); 10568 if (err) { 10569 sdata_info(sdata, 10570 "mlo: reconf: failed set valid links\n"); 10571 kfree_skb(skb); 10572 goto err_free; 10573 } 10574 10575 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; 10576 link_id++) { 10577 if (!(req->rem_links & BIT(link_id))) 10578 continue; 10579 10580 ieee80211_sta_remove_link(sta, link_id); 10581 } 10582 10583 /* notify the driver and upper layers */ 10584 ieee80211_vif_cfg_change_notify(sdata, 10585 BSS_CHANGED_MLD_VALID_LINKS); 10586 cfg80211_links_removed(sdata->dev, req->rem_links); 10587 } 10588 10589 sdata_info(sdata, "mlo: reconf: adding=0x%x, removed=0x%x\n", 10590 added_links, req->rem_links); 10591 10592 ieee80211_tx_skb(sdata, skb); 10593 10594 sdata->u.mgd.reconf.added_links = added_links; 10595 sdata->u.mgd.reconf.add_links_data = data; 10596 sdata->u.mgd.reconf.removed_links = req->rem_links; 10597 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 10598 &sdata->u.mgd.reconf.wk, 10599 IEEE80211_ASSOC_TIMEOUT_SHORT); 10600 return 0; 10601 10602 err_free: 10603 kfree(data); 10604 return err; 10605 } 10606 10607 static bool ieee80211_mgd_epcs_supp(struct ieee80211_sub_if_data *sdata) 10608 { 10609 unsigned long valid_links = sdata->vif.valid_links; 10610 u8 link_id; 10611 10612 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10613 10614 if (!ieee80211_vif_is_mld(&sdata->vif)) 10615 return false; 10616 10617 for_each_set_bit(link_id, &valid_links, IEEE80211_MLD_MAX_NUM_LINKS) { 10618 struct ieee80211_bss_conf *bss_conf = 10619 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 10620 10621 if (WARN_ON(!bss_conf) || !bss_conf->epcs_support) 10622 return false; 10623 } 10624 10625 return true; 10626 } 10627 10628 int ieee80211_mgd_set_epcs(struct ieee80211_sub_if_data *sdata, bool enable) 10629 { 10630 struct ieee80211_local *local = sdata->local; 10631 struct ieee80211_mgmt *mgmt; 10632 struct sk_buff *skb; 10633 int frame_len = offsetofend(struct ieee80211_mgmt, 10634 u.action.u.epcs) + (enable ? 1 : 0); 10635 10636 if (!ieee80211_mgd_epcs_supp(sdata)) 10637 return -EINVAL; 10638 10639 if (sdata->u.mgd.epcs.enabled == enable && 10640 !sdata->u.mgd.epcs.dialog_token) 10641 return 0; 10642 10643 /* Do not allow enabling EPCS if the AP didn't respond yet. 10644 * However, allow disabling EPCS in such a case. 10645 */ 10646 if (sdata->u.mgd.epcs.dialog_token && enable) 10647 return -EALREADY; 10648 10649 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 10650 if (!skb) 10651 return -ENOBUFS; 10652 10653 skb_reserve(skb, local->hw.extra_tx_headroom); 10654 mgmt = skb_put_zero(skb, frame_len); 10655 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 10656 IEEE80211_STYPE_ACTION); 10657 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 10658 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 10659 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 10660 10661 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 10662 if (enable) { 10663 u8 *pos = mgmt->u.action.u.epcs.variable; 10664 10665 mgmt->u.action.u.epcs.action_code = 10666 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_REQ; 10667 10668 *pos = ++sdata->u.mgd.dialog_token_alloc; 10669 sdata->u.mgd.epcs.dialog_token = *pos; 10670 } else { 10671 mgmt->u.action.u.epcs.action_code = 10672 WLAN_PROTECTED_EHT_ACTION_EPCS_ENABLE_TEARDOWN; 10673 10674 ieee80211_epcs_teardown(sdata); 10675 ieee80211_epcs_changed(sdata, false); 10676 } 10677 10678 ieee80211_tx_skb(sdata, skb); 10679 return 0; 10680 } 10681 10682 static void ieee80211_ml_epcs(struct ieee80211_sub_if_data *sdata, 10683 struct ieee802_11_elems *elems) 10684 { 10685 const struct element *sub; 10686 size_t scratch_len = elems->ml_epcs_len; 10687 u8 *scratch __free(kfree) = kzalloc(scratch_len, GFP_KERNEL); 10688 10689 lockdep_assert_wiphy(sdata->local->hw.wiphy); 10690 10691 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_epcs) 10692 return; 10693 10694 if (WARN_ON(!scratch)) 10695 return; 10696 10697 /* Directly parse the sub elements as the common information doesn't 10698 * hold any useful information. 10699 */ 10700 for_each_mle_subelement(sub, (const u8 *)elems->ml_epcs, 10701 elems->ml_epcs_len) { 10702 struct ieee80211_link_data *link; 10703 struct ieee802_11_elems *link_elems __free(kfree); 10704 u8 *pos = (void *)sub->data; 10705 u16 control; 10706 ssize_t len; 10707 u8 link_id; 10708 10709 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 10710 continue; 10711 10712 if (sub->datalen < sizeof(control)) 10713 break; 10714 10715 control = get_unaligned_le16(pos); 10716 link_id = control & IEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID; 10717 10718 link = sdata_dereference(sdata->link[link_id], sdata); 10719 if (!link) 10720 continue; 10721 10722 len = cfg80211_defragment_element(sub, (u8 *)elems->ml_epcs, 10723 elems->ml_epcs_len, 10724 scratch, scratch_len, 10725 IEEE80211_MLE_SUBELEM_FRAGMENT); 10726 if (len < (ssize_t)sizeof(control)) 10727 continue; 10728 10729 pos = scratch + sizeof(control); 10730 len -= sizeof(control); 10731 10732 link_elems = ieee802_11_parse_elems(pos, len, false, NULL); 10733 if (!link_elems) 10734 continue; 10735 10736 if (ieee80211_sta_wmm_params(sdata->local, link, 10737 link_elems->wmm_param, 10738 link_elems->wmm_param_len, 10739 link_elems->mu_edca_param_set)) 10740 ieee80211_link_info_change_notify(sdata, link, 10741 BSS_CHANGED_QOS); 10742 } 10743 } 10744 10745 void ieee80211_process_epcs_ena_resp(struct ieee80211_sub_if_data *sdata, 10746 struct ieee80211_mgmt *mgmt, size_t len) 10747 { 10748 struct ieee802_11_elems *elems __free(kfree) = NULL; 10749 size_t ies_len; 10750 u16 status_code; 10751 u8 *pos, dialog_token; 10752 10753 if (!ieee80211_mgd_epcs_supp(sdata)) 10754 return; 10755 10756 /* Handle dialog token and status code */ 10757 pos = mgmt->u.action.u.epcs.variable; 10758 dialog_token = *pos; 10759 status_code = get_unaligned_le16(pos + 1); 10760 10761 /* An EPCS enable response with dialog token == 0 is an unsolicited 10762 * notification from the AP MLD. In such a case, EPCS should already be 10763 * enabled and status must be success 10764 */ 10765 if (!dialog_token && 10766 (!sdata->u.mgd.epcs.enabled || 10767 status_code != WLAN_STATUS_SUCCESS)) 10768 return; 10769 10770 if (sdata->u.mgd.epcs.dialog_token != dialog_token) 10771 return; 10772 10773 sdata->u.mgd.epcs.dialog_token = 0; 10774 10775 if (status_code != WLAN_STATUS_SUCCESS) 10776 return; 10777 10778 pos += IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10779 ies_len = len - offsetof(struct ieee80211_mgmt, 10780 u.action.u.epcs.variable) - 10781 IEEE80211_EPCS_ENA_RESP_BODY_LEN; 10782 10783 elems = ieee802_11_parse_elems(pos, ies_len, true, NULL); 10784 if (!elems) 10785 return; 10786 10787 ieee80211_ml_epcs(sdata, elems); 10788 ieee80211_epcs_changed(sdata, true); 10789 } 10790 10791 void ieee80211_process_epcs_teardown(struct ieee80211_sub_if_data *sdata, 10792 struct ieee80211_mgmt *mgmt, size_t len) 10793 { 10794 if (!ieee80211_vif_is_mld(&sdata->vif) || 10795 !sdata->u.mgd.epcs.enabled) 10796 return; 10797 10798 ieee80211_epcs_teardown(sdata); 10799 ieee80211_epcs_changed(sdata, false); 10800 } 10801