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