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 <asm/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 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 48 49 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 50 51 static int max_nullfunc_tries = 2; 52 module_param(max_nullfunc_tries, int, 0644); 53 MODULE_PARM_DESC(max_nullfunc_tries, 54 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 55 56 static int max_probe_tries = 5; 57 module_param(max_probe_tries, int, 0644); 58 MODULE_PARM_DESC(max_probe_tries, 59 "Maximum probe tries before disconnecting (reason 4)."); 60 61 /* 62 * Beacon loss timeout is calculated as N frames times the 63 * advertised beacon interval. This may need to be somewhat 64 * higher than what hardware might detect to account for 65 * delays in the host processing frames. But since we also 66 * probe on beacon miss before declaring the connection lost 67 * default to what we want. 68 */ 69 static int beacon_loss_count = 7; 70 module_param(beacon_loss_count, int, 0644); 71 MODULE_PARM_DESC(beacon_loss_count, 72 "Number of beacon intervals before we decide beacon was lost."); 73 74 /* 75 * Time the connection can be idle before we probe 76 * it to see if we can still talk to the AP. 77 */ 78 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 79 /* 80 * Time we wait for a probe response after sending 81 * a probe request because of beacon loss or for 82 * checking the connection still works. 83 */ 84 static int probe_wait_ms = 500; 85 module_param(probe_wait_ms, int, 0644); 86 MODULE_PARM_DESC(probe_wait_ms, 87 "Maximum time(ms) to wait for probe response" 88 " before disconnecting (reason 4)."); 89 90 /* 91 * How many Beacon frames need to have been used in average signal strength 92 * before starting to indicate signal change events. 93 */ 94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 95 96 /* 97 * We can have multiple work items (and connection probing) 98 * scheduling this timer, but we need to take care to only 99 * reschedule it when it should fire _earlier_ than it was 100 * asked for before, or if it's not pending right now. This 101 * function ensures that. Note that it then is required to 102 * run this function for all timeouts after the first one 103 * has happened -- the work that runs from this timer will 104 * do that. 105 */ 106 static void run_again(struct ieee80211_sub_if_data *sdata, 107 unsigned long timeout) 108 { 109 lockdep_assert_wiphy(sdata->local->hw.wiphy); 110 111 if (!timer_pending(&sdata->u.mgd.timer) || 112 time_before(timeout, sdata->u.mgd.timer.expires)) 113 mod_timer(&sdata->u.mgd.timer, timeout); 114 } 115 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 117 { 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 119 return; 120 121 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 122 return; 123 124 mod_timer(&sdata->u.mgd.bcn_mon_timer, 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 126 } 127 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 129 { 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 131 132 if (unlikely(!ifmgd->associated)) 133 return; 134 135 if (ifmgd->probe_send_count) 136 ifmgd->probe_send_count = 0; 137 138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 139 return; 140 141 mod_timer(&ifmgd->conn_mon_timer, 142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 143 } 144 145 static int ecw2cw(int ecw) 146 { 147 return (1 << ecw) - 1; 148 } 149 150 static enum ieee80211_conn_mode 151 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 152 struct ieee80211_channel *channel, 153 u32 vht_cap_info, 154 const struct ieee802_11_elems *elems, 155 bool ignore_ht_channel_mismatch, 156 const struct ieee80211_conn_settings *conn, 157 struct cfg80211_chan_def *chandef) 158 { 159 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 160 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 161 const struct ieee80211_he_operation *he_oper = elems->he_operation; 162 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 163 struct ieee80211_supported_band *sband = 164 sdata->local->hw.wiphy->bands[channel->band]; 165 struct cfg80211_chan_def vht_chandef; 166 bool no_vht = false; 167 u32 ht_cfreq; 168 169 *chandef = (struct cfg80211_chan_def) { 170 .chan = channel, 171 .width = NL80211_CHAN_WIDTH_20_NOHT, 172 .center_freq1 = channel->center_freq, 173 .freq1_offset = channel->freq_offset, 174 }; 175 176 /* get special S1G case out of the way */ 177 if (sband->band == NL80211_BAND_S1GHZ) { 178 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 179 sdata_info(sdata, 180 "Missing S1G Operation Element? Trying operating == primary\n"); 181 chandef->width = ieee80211_s1g_channel_width(channel); 182 } 183 184 return IEEE80211_CONN_MODE_S1G; 185 } 186 187 /* get special 6 GHz case out of the way */ 188 if (sband->band == NL80211_BAND_6GHZ) { 189 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 190 191 /* this is an error */ 192 if (conn->mode < IEEE80211_CONN_MODE_HE) 193 return IEEE80211_CONN_MODE_LEGACY; 194 195 if (!elems->he_6ghz_capa || !elems->he_cap) { 196 sdata_info(sdata, 197 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 198 return IEEE80211_CONN_MODE_LEGACY; 199 } 200 201 if (!eht_oper || !elems->eht_cap) { 202 eht_oper = NULL; 203 mode = IEEE80211_CONN_MODE_HE; 204 } 205 206 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 207 eht_oper, chandef)) { 208 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 209 return IEEE80211_CONN_MODE_LEGACY; 210 } 211 212 return mode; 213 } 214 215 /* now we have the progression HT, VHT, ... */ 216 if (conn->mode < IEEE80211_CONN_MODE_HT) 217 return IEEE80211_CONN_MODE_LEGACY; 218 219 if (!ht_oper || !elems->ht_cap_elem) 220 return IEEE80211_CONN_MODE_LEGACY; 221 222 chandef->width = NL80211_CHAN_WIDTH_20; 223 224 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 225 channel->band); 226 /* check that channel matches the right operating channel */ 227 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 228 /* 229 * It's possible that some APs are confused here; 230 * Netgear WNDR3700 sometimes reports 4 higher than 231 * the actual channel in association responses, but 232 * since we look at probe response/beacon data here 233 * it should be OK. 234 */ 235 sdata_info(sdata, 236 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 237 channel->center_freq, ht_cfreq, 238 ht_oper->primary_chan, channel->band); 239 return IEEE80211_CONN_MODE_LEGACY; 240 } 241 242 ieee80211_chandef_ht_oper(ht_oper, chandef); 243 244 if (conn->mode < IEEE80211_CONN_MODE_VHT) 245 return IEEE80211_CONN_MODE_HT; 246 247 vht_chandef = *chandef; 248 249 /* 250 * having he_cap/he_oper parsed out implies we're at 251 * least operating as HE STA 252 */ 253 if (elems->he_cap && he_oper && 254 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 255 struct ieee80211_vht_operation he_oper_vht_cap; 256 257 /* 258 * Set only first 3 bytes (other 2 aren't used in 259 * ieee80211_chandef_vht_oper() anyway) 260 */ 261 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 262 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 263 264 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 265 &he_oper_vht_cap, ht_oper, 266 &vht_chandef)) { 267 sdata_info(sdata, 268 "HE AP VHT information is invalid, disabling HE\n"); 269 /* this will cause us to re-parse as VHT STA */ 270 return IEEE80211_CONN_MODE_VHT; 271 } 272 } else if (!vht_oper || !elems->vht_cap_elem) { 273 if (sband->band == NL80211_BAND_5GHZ) { 274 sdata_info(sdata, 275 "VHT information is missing, disabling VHT\n"); 276 return IEEE80211_CONN_MODE_HT; 277 } 278 no_vht = true; 279 } else if (sband->band == NL80211_BAND_2GHZ) { 280 no_vht = true; 281 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 282 vht_cap_info, 283 vht_oper, ht_oper, 284 &vht_chandef)) { 285 sdata_info(sdata, 286 "AP VHT information is invalid, disabling VHT\n"); 287 return IEEE80211_CONN_MODE_HT; 288 } 289 290 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 291 sdata_info(sdata, 292 "AP VHT information doesn't match HT, disabling VHT\n"); 293 return IEEE80211_CONN_MODE_HT; 294 } 295 296 *chandef = vht_chandef; 297 298 /* stick to current max mode if we or the AP don't have HE */ 299 if (conn->mode < IEEE80211_CONN_MODE_HE || 300 !elems->he_operation || !elems->he_cap) { 301 if (no_vht) 302 return IEEE80211_CONN_MODE_HT; 303 return IEEE80211_CONN_MODE_VHT; 304 } 305 306 /* stick to HE if we or the AP don't have EHT */ 307 if (conn->mode < IEEE80211_CONN_MODE_EHT || 308 !eht_oper || !elems->eht_cap) 309 return IEEE80211_CONN_MODE_HE; 310 311 /* 312 * handle the case that the EHT operation indicates that it holds EHT 313 * operation information (in case that the channel width differs from 314 * the channel width reported in HT/VHT/HE). 315 */ 316 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 317 struct cfg80211_chan_def eht_chandef = *chandef; 318 319 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 320 &eht_chandef); 321 322 eht_chandef.punctured = 323 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 324 325 if (!cfg80211_chandef_valid(&eht_chandef)) { 326 sdata_info(sdata, 327 "AP EHT information is invalid, disabling EHT\n"); 328 return IEEE80211_CONN_MODE_HE; 329 } 330 331 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 332 sdata_info(sdata, 333 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 334 return IEEE80211_CONN_MODE_HE; 335 } 336 337 *chandef = eht_chandef; 338 } 339 340 return IEEE80211_CONN_MODE_EHT; 341 } 342 343 static bool 344 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 345 const struct ieee80211_he_cap_elem *he_cap, 346 const struct ieee80211_he_operation *he_op) 347 { 348 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 349 u16 mcs_80_map_tx, mcs_80_map_rx; 350 u16 ap_min_req_set; 351 int nss; 352 353 if (!he_cap) 354 return false; 355 356 /* mcs_nss is right after he_cap info */ 357 he_mcs_nss_supp = (void *)(he_cap + 1); 358 359 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 360 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 361 362 /* P802.11-REVme/D0.3 363 * 27.1.1 Introduction to the HE PHY 364 * ... 365 * An HE STA shall support the following features: 366 * ... 367 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 368 * supported channel widths for HE SU PPDUs 369 */ 370 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 371 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 372 sdata_info(sdata, 373 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 374 mcs_80_map_tx, mcs_80_map_rx); 375 return false; 376 } 377 378 if (!he_op) 379 return true; 380 381 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 382 383 /* 384 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 385 * zeroes, which is nonsense, and completely inconsistent with itself 386 * (it doesn't have 8 streams). Accept the settings in this case anyway. 387 */ 388 if (!ap_min_req_set) 389 return true; 390 391 /* make sure the AP is consistent with itself 392 * 393 * P802.11-REVme/D0.3 394 * 26.17.1 Basic HE BSS operation 395 * 396 * A STA that is operating in an HE BSS shall be able to receive and 397 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 398 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 399 * MLME-START.request primitive and shall be able to receive at each of 400 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 401 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 402 * primitive 403 */ 404 for (nss = 8; nss > 0; nss--) { 405 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 406 u8 ap_rx_val; 407 u8 ap_tx_val; 408 409 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 410 continue; 411 412 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 413 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 414 415 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 416 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 417 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 418 sdata_info(sdata, 419 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 420 nss, ap_rx_val, ap_rx_val, ap_op_val); 421 return false; 422 } 423 } 424 425 return true; 426 } 427 428 static bool 429 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 430 struct ieee80211_supported_band *sband, 431 const struct ieee80211_he_operation *he_op) 432 { 433 const struct ieee80211_sta_he_cap *sta_he_cap = 434 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 435 u16 ap_min_req_set; 436 int i; 437 438 if (!sta_he_cap || !he_op) 439 return false; 440 441 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 442 443 /* 444 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 445 * zeroes, which is nonsense, and completely inconsistent with itself 446 * (it doesn't have 8 streams). Accept the settings in this case anyway. 447 */ 448 if (!ap_min_req_set) 449 return true; 450 451 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 452 for (i = 0; i < 3; i++) { 453 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 454 &sta_he_cap->he_mcs_nss_supp; 455 u16 sta_mcs_map_rx = 456 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 457 u16 sta_mcs_map_tx = 458 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 459 u8 nss; 460 bool verified = true; 461 462 /* 463 * For each band there is a maximum of 8 spatial streams 464 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 465 * of 2 bits per NSS (1-8), with the values defined in enum 466 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 467 * capabilities aren't less than the AP's minimum requirements 468 * for this HE BSS per SS. 469 * It is enough to find one such band that meets the reqs. 470 */ 471 for (nss = 8; nss > 0; nss--) { 472 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 473 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 474 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 475 476 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 477 continue; 478 479 /* 480 * Make sure the HE AP doesn't require MCSs that aren't 481 * supported by the client as required by spec 482 * 483 * P802.11-REVme/D0.3 484 * 26.17.1 Basic HE BSS operation 485 * 486 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 487 * a BSS, unless it supports (i.e., is able to both transmit and 488 * receive using) all of the <HE-MCS, NSS> tuples in the basic 489 * HE-MCS and NSS set. 490 */ 491 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 492 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 493 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 494 verified = false; 495 break; 496 } 497 } 498 499 if (verified) 500 return true; 501 } 502 503 /* If here, STA doesn't meet AP's HE min requirements */ 504 return false; 505 } 506 507 static u8 508 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 509 const struct ieee80211_sta_eht_cap *sta_eht_cap, 510 unsigned int idx, int bw) 511 { 512 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 513 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 514 515 /* handle us being a 20 MHz-only EHT STA - with four values 516 * for MCS 0-7, 8-9, 10-11, 12-13. 517 */ 518 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 519 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 520 521 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 522 if (idx > 0) 523 idx--; 524 525 switch (bw) { 526 case 0: 527 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 528 case 1: 529 if (!(he_phy_cap0 & 530 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 531 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 532 return 0xff; /* pass check */ 533 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 534 case 2: 535 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 536 return 0xff; /* pass check */ 537 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 538 } 539 540 WARN_ON(1); 541 return 0; 542 } 543 544 static bool 545 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 546 struct ieee80211_supported_band *sband, 547 const struct ieee80211_eht_operation *eht_op) 548 { 549 const struct ieee80211_sta_he_cap *sta_he_cap = 550 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 551 const struct ieee80211_sta_eht_cap *sta_eht_cap = 552 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 553 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 554 unsigned int i; 555 556 if (!sta_he_cap || !sta_eht_cap || !eht_op) 557 return false; 558 559 req = &eht_op->basic_mcs_nss; 560 561 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 562 u8 req_rx_nss, req_tx_nss; 563 unsigned int bw; 564 565 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 566 IEEE80211_EHT_MCS_NSS_RX); 567 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 568 IEEE80211_EHT_MCS_NSS_TX); 569 570 for (bw = 0; bw < 3; bw++) { 571 u8 have, have_rx_nss, have_tx_nss; 572 573 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 574 sta_eht_cap, 575 i, bw); 576 have_rx_nss = u8_get_bits(have, 577 IEEE80211_EHT_MCS_NSS_RX); 578 have_tx_nss = u8_get_bits(have, 579 IEEE80211_EHT_MCS_NSS_TX); 580 581 if (req_rx_nss > have_rx_nss || 582 req_tx_nss > have_tx_nss) 583 return false; 584 } 585 } 586 587 return true; 588 } 589 590 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 591 const struct cfg80211_chan_def *chandef, 592 u32 prohibited_flags) 593 { 594 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 595 chandef, prohibited_flags)) 596 return false; 597 598 if (chandef->punctured && 599 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 600 return false; 601 602 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 603 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 604 return false; 605 606 return true; 607 } 608 609 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 610 { 611 if (c->width == NL80211_CHAN_WIDTH_80P80) 612 return 4 + 4; 613 614 return nl80211_chan_width_to_mhz(c->width) / 20; 615 } 616 617 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 618 { 619 switch (c->width) { 620 case NL80211_CHAN_WIDTH_20: 621 case NL80211_CHAN_WIDTH_20_NOHT: 622 return 1; 623 case NL80211_CHAN_WIDTH_40: 624 return 2; 625 case NL80211_CHAN_WIDTH_80P80: 626 case NL80211_CHAN_WIDTH_80: 627 return 3; 628 case NL80211_CHAN_WIDTH_160: 629 return 4; 630 case NL80211_CHAN_WIDTH_320: 631 return 5; 632 default: 633 WARN_ON(1); 634 return 0; 635 } 636 } 637 638 VISIBLE_IF_MAC80211_KUNIT int 639 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 640 u8 n_partial_subchans) 641 { 642 int n = ieee80211_chandef_num_subchans(ap); 643 struct cfg80211_chan_def tmp = *ap; 644 int offset = 0; 645 646 /* 647 * Given a chandef (in this context, it's the AP's) and a number 648 * of subchannels that we want to look at ('n_partial_subchans'), 649 * calculate the offset in number of subchannels between the full 650 * and the subset with the desired width. 651 */ 652 653 /* same number of subchannels means no offset, obviously */ 654 if (n == n_partial_subchans) 655 return 0; 656 657 /* don't WARN - misconfigured APs could cause this if their N > width */ 658 if (n < n_partial_subchans) 659 return 0; 660 661 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 662 u32 prev = tmp.center_freq1; 663 664 ieee80211_chandef_downgrade(&tmp, NULL); 665 666 /* 667 * if center_freq moved up, half the original channels 668 * are gone now but were below, so increase offset 669 */ 670 if (prev < tmp.center_freq1) 671 offset += ieee80211_chandef_num_subchans(&tmp); 672 } 673 674 /* 675 * 80+80 with secondary 80 below primary - four subchannels for it 676 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 677 */ 678 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 679 ap->center_freq2 < ap->center_freq1) 680 offset += 4; 681 682 return offset; 683 } 684 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 685 686 VISIBLE_IF_MAC80211_KUNIT void 687 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 688 const struct cfg80211_chan_def *ap, 689 const struct cfg80211_chan_def *used) 690 { 691 u8 needed = ieee80211_chandef_num_subchans(used); 692 u8 have = ieee80211_chandef_num_subchans(ap); 693 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 694 u8 offset; 695 696 if (!psd->valid) 697 return; 698 699 /* if N is zero, all defaults were used, no point in rearranging */ 700 if (!psd->n) 701 goto out; 702 703 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 704 705 /* 706 * This assumes that 'N' is consistent with the HE channel, as 707 * it should be (otherwise the AP is broken). 708 * 709 * In psd->power we have values in the order 0..N, 0..K, where 710 * N+K should cover the entire channel per 'ap', but even if it 711 * doesn't then we've pre-filled 'unlimited' as defaults. 712 * 713 * But this is all the wrong order, we want to have them in the 714 * order of the 'used' channel. 715 * 716 * So for example, we could have a 320 MHz EHT AP, which has the 717 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 718 * seem to be considered for the TPE), as follows: 719 * 720 * EHT 320: | | | | | | | | | | | | | | | | | 721 * HE 80: | | | | | 722 * used 160: | | | | | | | | | 723 * 724 * N entries: |--|--|--|--| 725 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 726 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 727 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 728 * used chan: 0 1 2 3 4 5 6 7 729 * 730 * The idx in the power array ('power idx') is like this since it 731 * comes directly from the element's N and K entries in their 732 * element order, and those are this way for HE compatibility. 733 * 734 * Rearrange them as desired here, first by putting them into the 735 * 'full chan' order, and then selecting the necessary subset for 736 * the 'used chan'. 737 */ 738 739 /* first reorder according to AP channel */ 740 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 741 for (int i = 0; i < have; i++) { 742 if (i < offset) 743 tmp[i] = psd->power[i + psd->n]; 744 else if (i < offset + psd->n) 745 tmp[i] = psd->power[i - offset]; 746 else 747 tmp[i] = psd->power[i]; 748 } 749 750 /* 751 * and then select the subset for the used channel 752 * (set everything to defaults first in case a driver is confused) 753 */ 754 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 755 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 756 for (int i = 0; i < needed; i++) 757 psd->power[i] = tmp[offset + i]; 758 759 out: 760 /* limit, but don't lie if there are defaults in the data */ 761 if (needed < psd->count) 762 psd->count = needed; 763 } 764 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 765 766 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 767 const struct cfg80211_chan_def *ap, 768 const struct cfg80211_chan_def *used) 769 { 770 /* ignore this completely for narrow/invalid channels */ 771 if (!ieee80211_chandef_num_subchans(ap) || 772 !ieee80211_chandef_num_subchans(used)) { 773 ieee80211_clear_tpe(tpe); 774 return; 775 } 776 777 for (int i = 0; i < 2; i++) { 778 int needed_pwr_count; 779 780 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 781 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 782 783 /* limit this to the widths we actually need */ 784 needed_pwr_count = ieee80211_chandef_num_widths(used); 785 if (needed_pwr_count < tpe->max_local[i].count) 786 tpe->max_local[i].count = needed_pwr_count; 787 if (needed_pwr_count < tpe->max_reg_client[i].count) 788 tpe->max_reg_client[i].count = needed_pwr_count; 789 } 790 } 791 792 static struct ieee802_11_elems * 793 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 794 struct ieee80211_conn_settings *conn, 795 struct cfg80211_bss *cbss, int link_id, 796 struct ieee80211_chan_req *chanreq, 797 struct cfg80211_chan_def *ap_chandef) 798 { 799 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 800 struct ieee80211_bss *bss = (void *)cbss->priv; 801 struct ieee80211_channel *channel = cbss->channel; 802 struct ieee80211_elems_parse_params parse_params = { 803 .link_id = -1, 804 .from_ap = true, 805 .start = ies->data, 806 .len = ies->len, 807 }; 808 struct ieee802_11_elems *elems; 809 struct ieee80211_supported_band *sband; 810 enum ieee80211_conn_mode ap_mode; 811 int ret; 812 813 again: 814 parse_params.mode = conn->mode; 815 elems = ieee802_11_parse_elems_full(&parse_params); 816 if (!elems) 817 return ERR_PTR(-ENOMEM); 818 819 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 820 elems, false, conn, ap_chandef); 821 822 /* this should be impossible since parsing depends on our mode */ 823 if (WARN_ON(ap_mode > conn->mode)) { 824 ret = -EINVAL; 825 goto free; 826 } 827 828 if (conn->mode != ap_mode) { 829 conn->mode = ap_mode; 830 kfree(elems); 831 goto again; 832 } 833 834 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 835 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 836 837 sband = sdata->local->hw.wiphy->bands[channel->band]; 838 839 switch (channel->band) { 840 case NL80211_BAND_S1GHZ: 841 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 842 ret = -EINVAL; 843 goto free; 844 } 845 return elems; 846 case NL80211_BAND_6GHZ: 847 if (ap_mode < IEEE80211_CONN_MODE_HE) { 848 sdata_info(sdata, 849 "Rejecting non-HE 6/7 GHz connection"); 850 ret = -EINVAL; 851 goto free; 852 } 853 break; 854 default: 855 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 856 ret = -EINVAL; 857 goto free; 858 } 859 } 860 861 switch (ap_mode) { 862 case IEEE80211_CONN_MODE_S1G: 863 WARN_ON(1); 864 ret = -EINVAL; 865 goto free; 866 case IEEE80211_CONN_MODE_LEGACY: 867 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 868 break; 869 case IEEE80211_CONN_MODE_HT: 870 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 871 conn->bw_limit, 872 IEEE80211_CONN_BW_LIMIT_40); 873 break; 874 case IEEE80211_CONN_MODE_VHT: 875 case IEEE80211_CONN_MODE_HE: 876 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 877 conn->bw_limit, 878 IEEE80211_CONN_BW_LIMIT_160); 879 break; 880 case IEEE80211_CONN_MODE_EHT: 881 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 882 conn->bw_limit, 883 IEEE80211_CONN_BW_LIMIT_320); 884 break; 885 } 886 887 chanreq->oper = *ap_chandef; 888 889 /* wider-bandwidth OFDMA is only done in EHT */ 890 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 891 !(sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW)) 892 chanreq->ap = *ap_chandef; 893 else 894 chanreq->ap.chan = NULL; 895 896 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 897 IEEE80211_CHAN_DISABLED)) { 898 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 899 ret = -EINVAL; 900 goto free; 901 } 902 903 ieee80211_chanreq_downgrade(chanreq, conn); 904 } 905 906 if (conn->mode >= IEEE80211_CONN_MODE_HE && 907 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 908 IEEE80211_CHAN_NO_HE)) { 909 conn->mode = IEEE80211_CONN_MODE_VHT; 910 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 911 conn->bw_limit, 912 IEEE80211_CONN_BW_LIMIT_160); 913 } 914 915 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 916 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 917 IEEE80211_CHAN_NO_EHT)) { 918 conn->mode = IEEE80211_CONN_MODE_HE; 919 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 920 conn->bw_limit, 921 IEEE80211_CONN_BW_LIMIT_160); 922 } 923 924 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 925 sdata_info(sdata, 926 "regulatory prevented using AP config, downgraded\n"); 927 928 if (conn->mode >= IEEE80211_CONN_MODE_HE && 929 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 930 elems->he_operation) || 931 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 932 elems->he_operation))) { 933 conn->mode = IEEE80211_CONN_MODE_VHT; 934 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 935 } 936 937 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 938 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 939 elems->eht_operation)) { 940 conn->mode = IEEE80211_CONN_MODE_HE; 941 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 942 conn->bw_limit, 943 IEEE80211_CONN_BW_LIMIT_160); 944 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 945 } 946 947 /* the mode can only decrease, so this must terminate */ 948 if (ap_mode != conn->mode) { 949 kfree(elems); 950 goto again; 951 } 952 953 mlme_link_id_dbg(sdata, link_id, 954 "connecting with %s mode, max bandwidth %d MHz\n", 955 ieee80211_conn_mode_str(conn->mode), 956 20 * (1 << conn->bw_limit)); 957 958 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 959 ret = -EINVAL; 960 goto free; 961 } 962 963 return elems; 964 free: 965 kfree(elems); 966 return ERR_PTR(ret); 967 } 968 969 static int ieee80211_config_bw(struct ieee80211_link_data *link, 970 struct ieee802_11_elems *elems, 971 bool update, u64 *changed) 972 { 973 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 974 struct ieee80211_sub_if_data *sdata = link->sdata; 975 struct ieee80211_chan_req chanreq = {}; 976 struct cfg80211_chan_def ap_chandef; 977 enum ieee80211_conn_mode ap_mode; 978 u32 vht_cap_info = 0; 979 u16 ht_opmode; 980 int ret; 981 982 /* don't track any bandwidth changes in legacy/S1G modes */ 983 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 984 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 985 return 0; 986 987 if (elems->vht_cap_elem) 988 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 989 990 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 991 elems, true, &link->u.mgd.conn, 992 &ap_chandef); 993 994 if (ap_mode != link->u.mgd.conn.mode) { 995 link_info(link, 996 "AP appears to change mode (expected %s, found %s), disconnect\n", 997 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 998 ieee80211_conn_mode_str(ap_mode)); 999 return -EINVAL; 1000 } 1001 1002 chanreq.ap = ap_chandef; 1003 chanreq.oper = ap_chandef; 1004 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT || 1005 sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 1006 chanreq.ap.chan = NULL; 1007 1008 /* 1009 * if HT operation mode changed store the new one - 1010 * this may be applicable even if channel is identical 1011 */ 1012 if (elems->ht_operation) { 1013 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1014 if (link->conf->ht_operation_mode != ht_opmode) { 1015 *changed |= BSS_CHANGED_HT; 1016 link->conf->ht_operation_mode = ht_opmode; 1017 } 1018 } 1019 1020 /* 1021 * Downgrade the new channel if we associated with restricted 1022 * bandwidth capabilities. For example, if we associated as a 1023 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1024 * or config reasons) then switching to a 40 MHz channel now 1025 * won't do us any good -- we couldn't use it with the AP. 1026 */ 1027 while (link->u.mgd.conn.bw_limit < 1028 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1029 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1030 1031 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1032 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1033 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1034 &chanreq.oper); 1035 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1036 link->conf->tpe = elems->tpe; 1037 *changed |= BSS_CHANGED_TPE; 1038 } 1039 } 1040 1041 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1042 return 0; 1043 1044 link_info(link, 1045 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1046 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 1047 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1048 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1049 chanreq.oper.center_freq2); 1050 1051 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1052 sdata_info(sdata, 1053 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 1054 link->u.mgd.bssid); 1055 return -EINVAL; 1056 } 1057 1058 if (!update) { 1059 link->conf->chanreq = chanreq; 1060 return 0; 1061 } 1062 1063 /* 1064 * We're tracking the current AP here, so don't do any further checks 1065 * here. This keeps us from playing ping-pong with regulatory, without 1066 * it the following can happen (for example): 1067 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1068 * - AP advertises regdom US 1069 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1070 * - we detect an unsupported channel and disconnect 1071 * - disconnect causes CRDA to reload world regdomain and the game 1072 * starts anew. 1073 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1074 * 1075 * It seems possible that there are still scenarios with CSA or real 1076 * bandwidth changes where a this could happen, but those cases are 1077 * less common and wouldn't completely prevent using the AP. 1078 */ 1079 1080 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1081 if (ret) { 1082 sdata_info(sdata, 1083 "AP %pM changed bandwidth to incompatible one - disconnect\n", 1084 link->u.mgd.bssid); 1085 return ret; 1086 } 1087 1088 cfg80211_schedule_channels_check(&sdata->wdev); 1089 return 0; 1090 } 1091 1092 /* frame sending functions */ 1093 1094 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1095 struct sk_buff *skb, u8 ap_ht_param, 1096 struct ieee80211_supported_band *sband, 1097 struct ieee80211_channel *channel, 1098 enum ieee80211_smps_mode smps, 1099 const struct ieee80211_conn_settings *conn) 1100 { 1101 u8 *pos; 1102 u32 flags = channel->flags; 1103 u16 cap; 1104 struct ieee80211_sta_ht_cap ht_cap; 1105 1106 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1107 1108 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1109 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1110 1111 /* determine capability flags */ 1112 cap = ht_cap.cap; 1113 1114 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1115 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1116 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1117 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1118 cap &= ~IEEE80211_HT_CAP_SGI_40; 1119 } 1120 break; 1121 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1122 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1123 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1124 cap &= ~IEEE80211_HT_CAP_SGI_40; 1125 } 1126 break; 1127 } 1128 1129 /* 1130 * If 40 MHz was disabled associate as though we weren't 1131 * capable of 40 MHz -- some broken APs will never fall 1132 * back to trying to transmit in 20 MHz. 1133 */ 1134 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1135 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1136 cap &= ~IEEE80211_HT_CAP_SGI_40; 1137 } 1138 1139 /* set SM PS mode properly */ 1140 cap &= ~IEEE80211_HT_CAP_SM_PS; 1141 switch (smps) { 1142 case IEEE80211_SMPS_AUTOMATIC: 1143 case IEEE80211_SMPS_NUM_MODES: 1144 WARN_ON(1); 1145 fallthrough; 1146 case IEEE80211_SMPS_OFF: 1147 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1148 IEEE80211_HT_CAP_SM_PS_SHIFT; 1149 break; 1150 case IEEE80211_SMPS_STATIC: 1151 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1152 IEEE80211_HT_CAP_SM_PS_SHIFT; 1153 break; 1154 case IEEE80211_SMPS_DYNAMIC: 1155 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1156 IEEE80211_HT_CAP_SM_PS_SHIFT; 1157 break; 1158 } 1159 1160 /* reserve and fill IE */ 1161 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1162 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1163 } 1164 1165 /* This function determines vht capability flags for the association 1166 * and builds the IE. 1167 * Note - the function returns true to own the MU-MIMO capability 1168 */ 1169 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1170 struct sk_buff *skb, 1171 struct ieee80211_supported_band *sband, 1172 struct ieee80211_vht_cap *ap_vht_cap, 1173 const struct ieee80211_conn_settings *conn) 1174 { 1175 struct ieee80211_local *local = sdata->local; 1176 u8 *pos; 1177 u32 cap; 1178 struct ieee80211_sta_vht_cap vht_cap; 1179 u32 mask, ap_bf_sts, our_bf_sts; 1180 bool mu_mimo_owner = false; 1181 1182 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1183 1184 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1185 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1186 1187 /* determine capability flags */ 1188 cap = vht_cap.cap; 1189 1190 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1191 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1192 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1193 } 1194 1195 /* 1196 * Some APs apparently get confused if our capabilities are better 1197 * than theirs, so restrict what we advertise in the assoc request. 1198 */ 1199 if (!(ap_vht_cap->vht_cap_info & 1200 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1201 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1202 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1203 else if (!(ap_vht_cap->vht_cap_info & 1204 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1205 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1206 1207 /* 1208 * If some other vif is using the MU-MIMO capability we cannot associate 1209 * using MU-MIMO - this will lead to contradictions in the group-id 1210 * mechanism. 1211 * Ownership is defined since association request, in order to avoid 1212 * simultaneous associations with MU-MIMO. 1213 */ 1214 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1215 bool disable_mu_mimo = false; 1216 struct ieee80211_sub_if_data *other; 1217 1218 list_for_each_entry_rcu(other, &local->interfaces, list) { 1219 if (other->vif.bss_conf.mu_mimo_owner) { 1220 disable_mu_mimo = true; 1221 break; 1222 } 1223 } 1224 if (disable_mu_mimo) 1225 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1226 else 1227 mu_mimo_owner = true; 1228 } 1229 1230 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1231 1232 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1233 our_bf_sts = cap & mask; 1234 1235 if (ap_bf_sts < our_bf_sts) { 1236 cap &= ~mask; 1237 cap |= ap_bf_sts; 1238 } 1239 1240 /* reserve and fill IE */ 1241 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1242 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1243 1244 return mu_mimo_owner; 1245 } 1246 1247 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1248 enum nl80211_chan_width width, 1249 struct ieee80211_supported_band *sband, 1250 struct ieee80211_mgd_assoc_data *assoc_data) 1251 { 1252 u32 rates; 1253 1254 if (assoc_data->supp_rates_len) { 1255 /* 1256 * Get all rates supported by the device and the AP as 1257 * some APs don't like getting a superset of their rates 1258 * in the association request (e.g. D-Link DAP 1353 in 1259 * b-only mode)... 1260 */ 1261 ieee80211_parse_bitrates(width, sband, 1262 assoc_data->supp_rates, 1263 assoc_data->supp_rates_len, 1264 &rates); 1265 } else { 1266 /* 1267 * In case AP not provide any supported rates information 1268 * before association, we send information element(s) with 1269 * all rates that we support. 1270 */ 1271 rates = ~0; 1272 } 1273 1274 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1275 WLAN_EID_SUPP_RATES); 1276 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1277 WLAN_EID_EXT_SUPP_RATES); 1278 } 1279 1280 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1281 const u8 *elems, 1282 size_t elems_len, 1283 size_t offset) 1284 { 1285 size_t noffset; 1286 1287 static const u8 before_ht[] = { 1288 WLAN_EID_SSID, 1289 WLAN_EID_SUPP_RATES, 1290 WLAN_EID_EXT_SUPP_RATES, 1291 WLAN_EID_PWR_CAPABILITY, 1292 WLAN_EID_SUPPORTED_CHANNELS, 1293 WLAN_EID_RSN, 1294 WLAN_EID_QOS_CAPA, 1295 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1296 WLAN_EID_MOBILITY_DOMAIN, 1297 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1298 WLAN_EID_RIC_DATA, /* reassoc only */ 1299 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1300 }; 1301 static const u8 after_ric[] = { 1302 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1303 WLAN_EID_HT_CAPABILITY, 1304 WLAN_EID_BSS_COEX_2040, 1305 /* luckily this is almost always there */ 1306 WLAN_EID_EXT_CAPABILITY, 1307 WLAN_EID_QOS_TRAFFIC_CAPA, 1308 WLAN_EID_TIM_BCAST_REQ, 1309 WLAN_EID_INTERWORKING, 1310 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1311 WLAN_EID_VHT_CAPABILITY, 1312 WLAN_EID_OPMODE_NOTIF, 1313 }; 1314 1315 if (!elems_len) 1316 return offset; 1317 1318 noffset = ieee80211_ie_split_ric(elems, elems_len, 1319 before_ht, 1320 ARRAY_SIZE(before_ht), 1321 after_ric, 1322 ARRAY_SIZE(after_ric), 1323 offset); 1324 skb_put_data(skb, elems + offset, noffset - offset); 1325 1326 return noffset; 1327 } 1328 1329 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1330 const u8 *elems, 1331 size_t elems_len, 1332 size_t offset) 1333 { 1334 static const u8 before_vht[] = { 1335 /* 1336 * no need to list the ones split off before HT 1337 * or generated here 1338 */ 1339 WLAN_EID_BSS_COEX_2040, 1340 WLAN_EID_EXT_CAPABILITY, 1341 WLAN_EID_QOS_TRAFFIC_CAPA, 1342 WLAN_EID_TIM_BCAST_REQ, 1343 WLAN_EID_INTERWORKING, 1344 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1345 }; 1346 size_t noffset; 1347 1348 if (!elems_len) 1349 return offset; 1350 1351 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1352 noffset = ieee80211_ie_split(elems, elems_len, 1353 before_vht, ARRAY_SIZE(before_vht), 1354 offset); 1355 skb_put_data(skb, elems + offset, noffset - offset); 1356 1357 return noffset; 1358 } 1359 1360 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1361 const u8 *elems, 1362 size_t elems_len, 1363 size_t offset) 1364 { 1365 static const u8 before_he[] = { 1366 /* 1367 * no need to list the ones split off before VHT 1368 * or generated here 1369 */ 1370 WLAN_EID_OPMODE_NOTIF, 1371 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1372 /* 11ai elements */ 1373 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1374 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1375 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1376 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1377 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1378 /* TODO: add 11ah/11aj/11ak elements */ 1379 }; 1380 size_t noffset; 1381 1382 if (!elems_len) 1383 return offset; 1384 1385 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1386 noffset = ieee80211_ie_split(elems, elems_len, 1387 before_he, ARRAY_SIZE(before_he), 1388 offset); 1389 skb_put_data(skb, elems + offset, noffset - offset); 1390 1391 return noffset; 1392 } 1393 1394 #define PRESENT_ELEMS_MAX 8 1395 #define PRESENT_ELEM_EXT_OFFS 0x100 1396 1397 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1398 struct sk_buff *skb, u16 capab, 1399 const struct element *ext_capa, 1400 const u16 *present_elems); 1401 1402 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1403 struct sk_buff *skb, u16 *capab, 1404 const struct element *ext_capa, 1405 const u8 *extra_elems, 1406 size_t extra_elems_len, 1407 unsigned int link_id, 1408 struct ieee80211_link_data *link, 1409 u16 *present_elems) 1410 { 1411 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1413 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1414 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1415 struct ieee80211_channel *chan = cbss->channel; 1416 const struct ieee80211_sband_iftype_data *iftd; 1417 struct ieee80211_local *local = sdata->local; 1418 struct ieee80211_supported_band *sband; 1419 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1420 struct ieee80211_chanctx_conf *chanctx_conf; 1421 enum ieee80211_smps_mode smps_mode; 1422 u16 orig_capab = *capab; 1423 size_t offset = 0; 1424 int present_elems_len = 0; 1425 u8 *pos; 1426 int i; 1427 1428 #define ADD_PRESENT_ELEM(id) do { \ 1429 /* need a last for termination - we use 0 == SSID */ \ 1430 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1431 present_elems[present_elems_len++] = (id); \ 1432 } while (0) 1433 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1434 1435 if (link) 1436 smps_mode = link->smps_mode; 1437 else if (sdata->u.mgd.powersave) 1438 smps_mode = IEEE80211_SMPS_DYNAMIC; 1439 else 1440 smps_mode = IEEE80211_SMPS_OFF; 1441 1442 if (link) { 1443 /* 1444 * 5/10 MHz scenarios are only viable without MLO, in which 1445 * case this pointer should be used ... All of this is a bit 1446 * unclear though, not sure this even works at all. 1447 */ 1448 rcu_read_lock(); 1449 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1450 if (chanctx_conf) 1451 width = chanctx_conf->def.width; 1452 rcu_read_unlock(); 1453 } 1454 1455 sband = local->hw.wiphy->bands[chan->band]; 1456 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1457 1458 if (sband->band == NL80211_BAND_2GHZ) { 1459 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1460 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1461 } 1462 1463 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1464 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1465 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1466 1467 if (sband->band != NL80211_BAND_S1GHZ) 1468 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1469 1470 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1471 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1472 struct cfg80211_chan_def chandef = { 1473 .width = width, 1474 .chan = chan, 1475 }; 1476 1477 pos = skb_put(skb, 4); 1478 *pos++ = WLAN_EID_PWR_CAPABILITY; 1479 *pos++ = 2; 1480 *pos++ = 0; /* min tx power */ 1481 /* max tx power */ 1482 *pos++ = ieee80211_chandef_max_power(&chandef); 1483 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1484 } 1485 1486 /* 1487 * Per spec, we shouldn't include the list of channels if we advertise 1488 * support for extended channel switching, but we've always done that; 1489 * (for now?) apply this restriction only on the (new) 6 GHz band. 1490 */ 1491 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1492 (sband->band != NL80211_BAND_6GHZ || 1493 !ext_capa || ext_capa->datalen < 1 || 1494 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1495 /* TODO: get this in reg domain format */ 1496 pos = skb_put(skb, 2 * sband->n_channels + 2); 1497 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1498 *pos++ = 2 * sband->n_channels; 1499 for (i = 0; i < sband->n_channels; i++) { 1500 int cf = sband->channels[i].center_freq; 1501 1502 *pos++ = ieee80211_frequency_to_channel(cf); 1503 *pos++ = 1; /* one channel in the subband*/ 1504 } 1505 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1506 } 1507 1508 /* if present, add any custom IEs that go before HT */ 1509 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1510 extra_elems_len, 1511 offset); 1512 1513 if (sband->band != NL80211_BAND_6GHZ && 1514 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1515 ieee80211_add_ht_ie(sdata, skb, 1516 assoc_data->link[link_id].ap_ht_param, 1517 sband, chan, smps_mode, 1518 &assoc_data->link[link_id].conn); 1519 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1520 } 1521 1522 /* if present, add any custom IEs that go before VHT */ 1523 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1524 extra_elems_len, 1525 offset); 1526 1527 if (sband->band != NL80211_BAND_6GHZ && 1528 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1529 sband->vht_cap.vht_supported) { 1530 bool mu_mimo_owner = 1531 ieee80211_add_vht_ie(sdata, skb, sband, 1532 &assoc_data->link[link_id].ap_vht_cap, 1533 &assoc_data->link[link_id].conn); 1534 1535 if (link) 1536 link->conf->mu_mimo_owner = mu_mimo_owner; 1537 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1538 } 1539 1540 /* if present, add any custom IEs that go before HE */ 1541 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1542 extra_elems_len, 1543 offset); 1544 1545 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1546 ieee80211_put_he_cap(skb, sdata, sband, 1547 &assoc_data->link[link_id].conn); 1548 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1549 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1550 } 1551 1552 /* 1553 * careful - need to know about all the present elems before 1554 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1555 * we're going to put it after the ML element 1556 */ 1557 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1558 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1559 1560 if (link_id == assoc_data->assoc_link_id) 1561 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1562 present_elems); 1563 1564 /* crash if somebody gets it wrong */ 1565 present_elems = NULL; 1566 1567 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1568 ieee80211_put_eht_cap(skb, sdata, sband, 1569 &assoc_data->link[link_id].conn); 1570 1571 if (sband->band == NL80211_BAND_S1GHZ) { 1572 ieee80211_add_aid_request_ie(sdata, skb); 1573 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1574 } 1575 1576 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1577 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1578 1579 return offset; 1580 } 1581 1582 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1583 const u16 *outer, 1584 const u16 *inner) 1585 { 1586 unsigned int skb_len = skb->len; 1587 bool at_extension = false; 1588 bool added = false; 1589 int i, j; 1590 u8 *len, *list_len = NULL; 1591 1592 skb_put_u8(skb, WLAN_EID_EXTENSION); 1593 len = skb_put(skb, 1); 1594 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1595 1596 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1597 u16 elem = outer[i]; 1598 bool have_inner = false; 1599 1600 /* should at least be sorted in the sense of normal -> ext */ 1601 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1602 1603 /* switch to extension list */ 1604 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1605 at_extension = true; 1606 if (!list_len) 1607 skb_put_u8(skb, 0); 1608 list_len = NULL; 1609 } 1610 1611 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1612 if (elem == inner[j]) { 1613 have_inner = true; 1614 break; 1615 } 1616 } 1617 1618 if (have_inner) 1619 continue; 1620 1621 if (!list_len) { 1622 list_len = skb_put(skb, 1); 1623 *list_len = 0; 1624 } 1625 *list_len += 1; 1626 skb_put_u8(skb, (u8)elem); 1627 added = true; 1628 } 1629 1630 /* if we added a list but no extension list, make a zero-len one */ 1631 if (added && (!at_extension || !list_len)) 1632 skb_put_u8(skb, 0); 1633 1634 /* if nothing added remove extension element completely */ 1635 if (!added) 1636 skb_trim(skb, skb_len); 1637 else 1638 *len = skb->len - skb_len - 2; 1639 } 1640 1641 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1642 struct sk_buff *skb, u16 capab, 1643 const struct element *ext_capa, 1644 const u16 *outer_present_elems) 1645 { 1646 struct ieee80211_local *local = sdata->local; 1647 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1648 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1649 struct ieee80211_multi_link_elem *ml_elem; 1650 struct ieee80211_mle_basic_common_info *common; 1651 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1652 __le16 eml_capa = 0, mld_capa_ops = 0; 1653 unsigned int link_id; 1654 u8 *ml_elem_len; 1655 void *capab_pos; 1656 1657 if (!ieee80211_vif_is_mld(&sdata->vif)) 1658 return; 1659 1660 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1661 ieee80211_vif_type_p2p(&sdata->vif)); 1662 if (ift_ext_capa) { 1663 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1664 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1665 } 1666 1667 skb_put_u8(skb, WLAN_EID_EXTENSION); 1668 ml_elem_len = skb_put(skb, 1); 1669 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1670 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1671 ml_elem->control = 1672 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1673 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1674 common = skb_put(skb, sizeof(*common)); 1675 common->len = sizeof(*common) + 1676 2; /* MLD capa/ops */ 1677 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1678 1679 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1680 if (eml_capa & 1681 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1682 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1683 common->len += 2; /* EML capabilities */ 1684 ml_elem->control |= 1685 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1686 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1687 } 1688 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1689 1690 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1691 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1692 const u8 *extra_elems; 1693 size_t extra_elems_len; 1694 size_t extra_used; 1695 u8 *subelem_len = NULL; 1696 __le16 ctrl; 1697 1698 if (!assoc_data->link[link_id].bss || 1699 link_id == assoc_data->assoc_link_id) 1700 continue; 1701 1702 extra_elems = assoc_data->link[link_id].elems; 1703 extra_elems_len = assoc_data->link[link_id].elems_len; 1704 1705 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1706 subelem_len = skb_put(skb, 1); 1707 1708 ctrl = cpu_to_le16(link_id | 1709 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1710 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1711 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1712 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1713 skb_put_data(skb, assoc_data->link[link_id].addr, 1714 ETH_ALEN); 1715 /* 1716 * Now add the contents of the (re)association request, 1717 * but the "listen interval" and "current AP address" 1718 * (if applicable) are skipped. So we only have 1719 * the capability field (remember the position and fill 1720 * later), followed by the elements added below by 1721 * calling ieee80211_assoc_link_elems(). 1722 */ 1723 capab_pos = skb_put(skb, 2); 1724 1725 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1726 ext_capa, 1727 extra_elems, 1728 extra_elems_len, 1729 link_id, NULL, 1730 link_present_elems); 1731 if (extra_elems) 1732 skb_put_data(skb, extra_elems + extra_used, 1733 extra_elems_len - extra_used); 1734 1735 put_unaligned_le16(capab, capab_pos); 1736 1737 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1738 link_present_elems); 1739 1740 ieee80211_fragment_element(skb, subelem_len, 1741 IEEE80211_MLE_SUBELEM_FRAGMENT); 1742 } 1743 1744 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1745 } 1746 1747 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1748 { 1749 struct ieee80211_local *local = sdata->local; 1750 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1751 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1752 struct ieee80211_link_data *link; 1753 struct sk_buff *skb; 1754 struct ieee80211_mgmt *mgmt; 1755 u8 *pos, qos_info, *ie_start; 1756 size_t offset, noffset; 1757 u16 capab = 0, link_capab; 1758 __le16 listen_int; 1759 struct element *ext_capa = NULL; 1760 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1761 struct ieee80211_prep_tx_info info = {}; 1762 unsigned int link_id, n_links = 0; 1763 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1764 void *capab_pos; 1765 size_t size; 1766 int ret; 1767 1768 /* we know it's writable, cast away the const */ 1769 if (assoc_data->ie_len) 1770 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1771 assoc_data->ie, 1772 assoc_data->ie_len); 1773 1774 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1775 1776 size = local->hw.extra_tx_headroom + 1777 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1778 2 + assoc_data->ssid_len + /* SSID */ 1779 assoc_data->ie_len + /* extra IEs */ 1780 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1781 9; /* WMM */ 1782 1783 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1784 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1785 const struct ieee80211_sband_iftype_data *iftd; 1786 struct ieee80211_supported_band *sband; 1787 1788 if (!cbss) 1789 continue; 1790 1791 sband = local->hw.wiphy->bands[cbss->channel->band]; 1792 1793 n_links++; 1794 /* add STA profile elements length */ 1795 size += assoc_data->link[link_id].elems_len; 1796 /* and supported rates length */ 1797 size += 4 + sband->n_bitrates; 1798 /* supported channels */ 1799 size += 2 + 2 * sband->n_channels; 1800 1801 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1802 if (iftd) 1803 size += iftd->vendor_elems.len; 1804 1805 /* power capability */ 1806 size += 4; 1807 1808 /* HT, VHT, HE, EHT */ 1809 size += 2 + sizeof(struct ieee80211_ht_cap); 1810 size += 2 + sizeof(struct ieee80211_vht_cap); 1811 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1812 sizeof(struct ieee80211_he_mcs_nss_supp) + 1813 IEEE80211_HE_PPE_THRES_MAX_LEN; 1814 1815 if (sband->band == NL80211_BAND_6GHZ) 1816 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1817 1818 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1819 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1820 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1821 1822 /* non-inheritance element */ 1823 size += 2 + 2 + PRESENT_ELEMS_MAX; 1824 1825 /* should be the same across all BSSes */ 1826 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1827 capab |= WLAN_CAPABILITY_PRIVACY; 1828 } 1829 1830 if (ieee80211_vif_is_mld(&sdata->vif)) { 1831 /* consider the multi-link element with STA profile */ 1832 size += sizeof(struct ieee80211_multi_link_elem); 1833 /* max common info field in basic multi-link element */ 1834 size += sizeof(struct ieee80211_mle_basic_common_info) + 1835 2 + /* capa & op */ 1836 2; /* EML capa */ 1837 1838 /* 1839 * The capability elements were already considered above; 1840 * note this over-estimates a bit because there's no 1841 * STA profile for the assoc link. 1842 */ 1843 size += (n_links - 1) * 1844 (1 + 1 + /* subelement ID/length */ 1845 2 + /* STA control */ 1846 1 + ETH_ALEN + 2 /* STA Info field */); 1847 } 1848 1849 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1850 if (WARN_ON(!link)) 1851 return -EINVAL; 1852 1853 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1854 return -EINVAL; 1855 1856 skb = alloc_skb(size, GFP_KERNEL); 1857 if (!skb) 1858 return -ENOMEM; 1859 1860 skb_reserve(skb, local->hw.extra_tx_headroom); 1861 1862 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1863 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1864 1865 /* Set MBSSID support for HE AP if needed */ 1866 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1867 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1868 ext_capa && ext_capa->datalen >= 3) 1869 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1870 1871 mgmt = skb_put_zero(skb, 24); 1872 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1873 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1874 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1875 1876 listen_int = cpu_to_le16(assoc_data->s1g ? 1877 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1878 local->hw.conf.listen_interval); 1879 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1880 skb_put(skb, 10); 1881 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1882 IEEE80211_STYPE_REASSOC_REQ); 1883 capab_pos = &mgmt->u.reassoc_req.capab_info; 1884 mgmt->u.reassoc_req.listen_interval = listen_int; 1885 memcpy(mgmt->u.reassoc_req.current_ap, 1886 assoc_data->prev_ap_addr, ETH_ALEN); 1887 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1888 } else { 1889 skb_put(skb, 4); 1890 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1891 IEEE80211_STYPE_ASSOC_REQ); 1892 capab_pos = &mgmt->u.assoc_req.capab_info; 1893 mgmt->u.assoc_req.listen_interval = listen_int; 1894 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1895 } 1896 1897 /* SSID */ 1898 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1899 ie_start = pos; 1900 *pos++ = WLAN_EID_SSID; 1901 *pos++ = assoc_data->ssid_len; 1902 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1903 1904 /* 1905 * This bit is technically reserved, so it shouldn't matter for either 1906 * the AP or us, but it also means we shouldn't set it. However, we've 1907 * always set it in the past, and apparently some EHT APs check that 1908 * we don't set it. To avoid interoperability issues with old APs that 1909 * for some reason check it and want it to be set, set the bit for all 1910 * pre-EHT connections as we used to do. 1911 */ 1912 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1913 capab |= WLAN_CAPABILITY_ESS; 1914 1915 /* add the elements for the assoc (main) link */ 1916 link_capab = capab; 1917 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1918 ext_capa, 1919 assoc_data->ie, 1920 assoc_data->ie_len, 1921 assoc_data->assoc_link_id, link, 1922 present_elems); 1923 put_unaligned_le16(link_capab, capab_pos); 1924 1925 /* if present, add any custom non-vendor IEs */ 1926 if (assoc_data->ie_len) { 1927 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1928 assoc_data->ie_len, 1929 offset); 1930 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1931 offset = noffset; 1932 } 1933 1934 if (assoc_data->wmm) { 1935 if (assoc_data->uapsd) { 1936 qos_info = ifmgd->uapsd_queues; 1937 qos_info |= (ifmgd->uapsd_max_sp_len << 1938 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1939 } else { 1940 qos_info = 0; 1941 } 1942 1943 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1944 } 1945 1946 /* add any remaining custom (i.e. vendor specific here) IEs */ 1947 if (assoc_data->ie_len) { 1948 noffset = assoc_data->ie_len; 1949 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1950 } 1951 1952 if (assoc_data->fils_kek_len) { 1953 ret = fils_encrypt_assoc_req(skb, assoc_data); 1954 if (ret < 0) { 1955 dev_kfree_skb(skb); 1956 return ret; 1957 } 1958 } 1959 1960 pos = skb_tail_pointer(skb); 1961 kfree(ifmgd->assoc_req_ies); 1962 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1963 if (!ifmgd->assoc_req_ies) { 1964 dev_kfree_skb(skb); 1965 return -ENOMEM; 1966 } 1967 1968 ifmgd->assoc_req_ies_len = pos - ie_start; 1969 1970 info.link_id = assoc_data->assoc_link_id; 1971 drv_mgd_prepare_tx(local, sdata, &info); 1972 1973 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1974 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1975 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1976 IEEE80211_TX_INTFL_MLME_CONN_TX; 1977 ieee80211_tx_skb(sdata, skb); 1978 1979 return 0; 1980 } 1981 1982 void ieee80211_send_pspoll(struct ieee80211_local *local, 1983 struct ieee80211_sub_if_data *sdata) 1984 { 1985 struct ieee80211_pspoll *pspoll; 1986 struct sk_buff *skb; 1987 1988 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1989 if (!skb) 1990 return; 1991 1992 pspoll = (struct ieee80211_pspoll *) skb->data; 1993 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1994 1995 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1996 ieee80211_tx_skb(sdata, skb); 1997 } 1998 1999 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2000 struct ieee80211_sub_if_data *sdata, 2001 bool powersave) 2002 { 2003 struct sk_buff *skb; 2004 struct ieee80211_hdr_3addr *nullfunc; 2005 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2006 2007 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2008 !ieee80211_hw_check(&local->hw, 2009 DOESNT_SUPPORT_QOS_NDP)); 2010 if (!skb) 2011 return; 2012 2013 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2014 if (powersave) 2015 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2016 2017 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2018 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2019 2020 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2021 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2022 2023 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2024 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2025 2026 ieee80211_tx_skb(sdata, skb); 2027 } 2028 2029 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2030 struct ieee80211_sub_if_data *sdata) 2031 { 2032 struct sk_buff *skb; 2033 struct ieee80211_hdr *nullfunc; 2034 __le16 fc; 2035 2036 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2037 return; 2038 2039 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2040 if (!skb) 2041 return; 2042 2043 skb_reserve(skb, local->hw.extra_tx_headroom); 2044 2045 nullfunc = skb_put_zero(skb, 30); 2046 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2047 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2048 nullfunc->frame_control = fc; 2049 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2050 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2051 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2052 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2053 2054 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2055 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2056 ieee80211_tx_skb(sdata, skb); 2057 } 2058 2059 /* spectrum management related things */ 2060 static void ieee80211_chswitch_work(struct wiphy *wiphy, 2061 struct wiphy_work *work) 2062 { 2063 struct ieee80211_link_data *link = 2064 container_of(work, struct ieee80211_link_data, 2065 u.mgd.chswitch_work.work); 2066 struct ieee80211_sub_if_data *sdata = link->sdata; 2067 struct ieee80211_local *local = sdata->local; 2068 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2069 int ret; 2070 2071 if (!ieee80211_sdata_running(sdata)) 2072 return; 2073 2074 lockdep_assert_wiphy(local->hw.wiphy); 2075 2076 if (!ifmgd->associated) 2077 return; 2078 2079 if (!link->conf->csa_active) 2080 return; 2081 2082 /* 2083 * using reservation isn't immediate as it may be deferred until later 2084 * with multi-vif. once reservation is complete it will re-schedule the 2085 * work with no reserved_chanctx so verify chandef to check if it 2086 * completed successfully 2087 */ 2088 2089 if (link->reserved_chanctx) { 2090 /* 2091 * with multi-vif csa driver may call ieee80211_csa_finish() 2092 * many times while waiting for other interfaces to use their 2093 * reservations 2094 */ 2095 if (link->reserved_ready) 2096 return; 2097 2098 ret = ieee80211_link_use_reserved_context(link); 2099 if (ret) { 2100 sdata_info(sdata, 2101 "failed to use reserved channel context, disconnecting (err=%d)\n", 2102 ret); 2103 wiphy_work_queue(sdata->local->hw.wiphy, 2104 &ifmgd->csa_connection_drop_work); 2105 } 2106 return; 2107 } 2108 2109 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2110 &link->csa_chanreq)) { 2111 sdata_info(sdata, 2112 "failed to finalize channel switch, disconnecting\n"); 2113 wiphy_work_queue(sdata->local->hw.wiphy, 2114 &ifmgd->csa_connection_drop_work); 2115 return; 2116 } 2117 2118 link->u.mgd.csa_waiting_bcn = true; 2119 2120 ieee80211_sta_reset_beacon_monitor(sdata); 2121 ieee80211_sta_reset_conn_monitor(sdata); 2122 } 2123 2124 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2125 { 2126 struct ieee80211_sub_if_data *sdata = link->sdata; 2127 struct ieee80211_local *local = sdata->local; 2128 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2129 int ret; 2130 2131 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2132 2133 WARN_ON(!link->conf->csa_active); 2134 2135 if (sdata->csa_blocked_queues) { 2136 ieee80211_wake_vif_queues(local, sdata, 2137 IEEE80211_QUEUE_STOP_REASON_CSA); 2138 sdata->csa_blocked_queues = false; 2139 } 2140 2141 link->conf->csa_active = false; 2142 link->u.mgd.csa_blocked_tx = false; 2143 link->u.mgd.csa_waiting_bcn = false; 2144 2145 ret = drv_post_channel_switch(link); 2146 if (ret) { 2147 sdata_info(sdata, 2148 "driver post channel switch failed, disconnecting\n"); 2149 wiphy_work_queue(sdata->local->hw.wiphy, 2150 &ifmgd->csa_connection_drop_work); 2151 return; 2152 } 2153 2154 cfg80211_ch_switch_notify(sdata->dev, &link->reserved.oper, 2155 link->link_id); 2156 } 2157 2158 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2159 unsigned int link_id) 2160 { 2161 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2162 2163 trace_api_chswitch_done(sdata, success, link_id); 2164 2165 rcu_read_lock(); 2166 2167 if (!success) { 2168 sdata_info(sdata, 2169 "driver channel switch failed, disconnecting\n"); 2170 wiphy_work_queue(sdata->local->hw.wiphy, 2171 &sdata->u.mgd.csa_connection_drop_work); 2172 } else { 2173 struct ieee80211_link_data *link = 2174 rcu_dereference(sdata->link[link_id]); 2175 2176 if (WARN_ON(!link)) { 2177 rcu_read_unlock(); 2178 return; 2179 } 2180 2181 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2182 &link->u.mgd.chswitch_work, 0); 2183 } 2184 2185 rcu_read_unlock(); 2186 } 2187 EXPORT_SYMBOL(ieee80211_chswitch_done); 2188 2189 static void 2190 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2191 { 2192 struct ieee80211_sub_if_data *sdata = link->sdata; 2193 struct ieee80211_local *local = sdata->local; 2194 2195 lockdep_assert_wiphy(local->hw.wiphy); 2196 2197 if (!local->ops->abort_channel_switch) 2198 return; 2199 2200 ieee80211_link_unreserve_chanctx(link); 2201 2202 if (sdata->csa_blocked_queues) { 2203 ieee80211_wake_vif_queues(local, sdata, 2204 IEEE80211_QUEUE_STOP_REASON_CSA); 2205 sdata->csa_blocked_queues = false; 2206 } 2207 2208 link->conf->csa_active = false; 2209 link->u.mgd.csa_blocked_tx = false; 2210 2211 drv_abort_channel_switch(link); 2212 } 2213 2214 static void 2215 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2216 u64 timestamp, u32 device_timestamp, 2217 struct ieee802_11_elems *elems, 2218 bool beacon) 2219 { 2220 struct ieee80211_sub_if_data *sdata = link->sdata; 2221 struct ieee80211_local *local = sdata->local; 2222 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2223 struct cfg80211_bss *cbss = link->conf->bss; 2224 struct ieee80211_chanctx_conf *conf; 2225 struct ieee80211_chanctx *chanctx; 2226 enum nl80211_band current_band; 2227 struct ieee80211_csa_ie csa_ie; 2228 struct ieee80211_channel_switch ch_switch = { 2229 .link_id = link->link_id, 2230 }; 2231 struct ieee80211_bss *bss; 2232 unsigned long timeout; 2233 int res; 2234 2235 lockdep_assert_wiphy(local->hw.wiphy); 2236 2237 if (!cbss) 2238 return; 2239 2240 current_band = cbss->channel->band; 2241 bss = (void *)cbss->priv; 2242 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 2243 bss->vht_cap_info, 2244 &link->u.mgd.conn, 2245 link->u.mgd.bssid, &csa_ie); 2246 2247 if (!res) { 2248 ch_switch.timestamp = timestamp; 2249 ch_switch.device_timestamp = device_timestamp; 2250 ch_switch.block_tx = csa_ie.mode; 2251 ch_switch.chandef = csa_ie.chanreq.oper; 2252 ch_switch.count = csa_ie.count; 2253 ch_switch.delay = csa_ie.max_switch_time; 2254 } 2255 2256 if (res < 0) 2257 goto drop_connection; 2258 2259 if (link->conf->csa_active) { 2260 /* already processing - disregard action frames */ 2261 if (!beacon) 2262 return; 2263 2264 if (link->u.mgd.csa_waiting_bcn) { 2265 ieee80211_chswitch_post_beacon(link); 2266 /* 2267 * If the CSA IE is still present in the beacon after 2268 * the switch, we need to consider it as a new CSA 2269 * (possibly to self) - this happens by not returning 2270 * here so we'll get to the check below. 2271 */ 2272 } else if (res) { 2273 ieee80211_sta_abort_chanswitch(link); 2274 return; 2275 } else { 2276 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2277 return; 2278 } 2279 } 2280 2281 /* nothing to do at all - no active CSA nor a new one */ 2282 if (res) 2283 return; 2284 2285 if (link->conf->chanreq.oper.chan->band != 2286 csa_ie.chanreq.oper.chan->band) { 2287 sdata_info(sdata, 2288 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2289 link->u.mgd.bssid, 2290 csa_ie.chanreq.oper.chan->center_freq, 2291 csa_ie.chanreq.oper.width, 2292 csa_ie.chanreq.oper.center_freq1, 2293 csa_ie.chanreq.oper.center_freq2); 2294 goto drop_connection; 2295 } 2296 2297 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2298 IEEE80211_CHAN_DISABLED)) { 2299 sdata_info(sdata, 2300 "AP %pM switches to unsupported channel " 2301 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 2302 "disconnecting\n", 2303 link->u.mgd.bssid, 2304 csa_ie.chanreq.oper.chan->center_freq, 2305 csa_ie.chanreq.oper.chan->freq_offset, 2306 csa_ie.chanreq.oper.width, 2307 csa_ie.chanreq.oper.center_freq1, 2308 csa_ie.chanreq.oper.freq1_offset, 2309 csa_ie.chanreq.oper.center_freq2); 2310 goto drop_connection; 2311 } 2312 2313 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2314 &link->conf->chanreq.oper) && 2315 (!csa_ie.mode || !beacon)) { 2316 if (link->u.mgd.csa_ignored_same_chan) 2317 return; 2318 sdata_info(sdata, 2319 "AP %pM tries to chanswitch to same channel, ignore\n", 2320 link->u.mgd.bssid); 2321 link->u.mgd.csa_ignored_same_chan = true; 2322 return; 2323 } 2324 2325 /* 2326 * Drop all TDLS peers on the affected link - either we disconnect or 2327 * move to a different channel from this point on. There's no telling 2328 * what our peer will do. 2329 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2330 * have an incompatible wider chandef. 2331 */ 2332 ieee80211_teardown_tdls_peers(link); 2333 2334 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2335 lockdep_is_held(&local->hw.wiphy->mtx)); 2336 if (!conf) { 2337 sdata_info(sdata, 2338 "no channel context assigned to vif?, disconnecting\n"); 2339 goto drop_connection; 2340 } 2341 2342 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2343 2344 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2345 sdata_info(sdata, 2346 "driver doesn't support chan-switch with channel contexts\n"); 2347 goto drop_connection; 2348 } 2349 2350 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2351 sdata_info(sdata, 2352 "preparing for channel switch failed, disconnecting\n"); 2353 goto drop_connection; 2354 } 2355 2356 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chanreq, 2357 chanctx->mode, false); 2358 if (res) { 2359 sdata_info(sdata, 2360 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2361 res); 2362 goto drop_connection; 2363 } 2364 2365 link->conf->csa_active = true; 2366 link->csa_chanreq = csa_ie.chanreq; 2367 link->u.mgd.csa_ignored_same_chan = false; 2368 link->u.mgd.beacon_crc_valid = false; 2369 link->u.mgd.csa_blocked_tx = csa_ie.mode; 2370 2371 if (csa_ie.mode && 2372 !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA)) { 2373 ieee80211_stop_vif_queues(local, sdata, 2374 IEEE80211_QUEUE_STOP_REASON_CSA); 2375 sdata->csa_blocked_queues = true; 2376 } 2377 2378 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2379 link->link_id, csa_ie.count, 2380 csa_ie.mode); 2381 2382 if (local->ops->channel_switch) { 2383 /* use driver's channel switch callback */ 2384 drv_channel_switch(local, sdata, &ch_switch); 2385 return; 2386 } 2387 2388 /* channel switch handled in software */ 2389 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2390 cbss->beacon_interval); 2391 wiphy_delayed_work_queue(local->hw.wiphy, 2392 &link->u.mgd.chswitch_work, 2393 timeout); 2394 return; 2395 drop_connection: 2396 /* 2397 * This is just so that the disconnect flow will know that 2398 * we were trying to switch channel and failed. In case the 2399 * mode is 1 (we are not allowed to Tx), we will know not to 2400 * send a deauthentication frame. Those two fields will be 2401 * reset when the disconnection worker runs. 2402 */ 2403 link->conf->csa_active = true; 2404 link->u.mgd.csa_blocked_tx = csa_ie.mode; 2405 sdata->csa_blocked_queues = 2406 csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA); 2407 2408 wiphy_work_queue(sdata->local->hw.wiphy, 2409 &ifmgd->csa_connection_drop_work); 2410 } 2411 2412 static bool 2413 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2414 struct ieee80211_channel *channel, 2415 const u8 *country_ie, u8 country_ie_len, 2416 const u8 *pwr_constr_elem, 2417 int *chan_pwr, int *pwr_reduction) 2418 { 2419 struct ieee80211_country_ie_triplet *triplet; 2420 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2421 int i, chan_increment; 2422 bool have_chan_pwr = false; 2423 2424 /* Invalid IE */ 2425 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2426 return false; 2427 2428 triplet = (void *)(country_ie + 3); 2429 country_ie_len -= 3; 2430 2431 switch (channel->band) { 2432 default: 2433 WARN_ON_ONCE(1); 2434 fallthrough; 2435 case NL80211_BAND_2GHZ: 2436 case NL80211_BAND_60GHZ: 2437 case NL80211_BAND_LC: 2438 chan_increment = 1; 2439 break; 2440 case NL80211_BAND_5GHZ: 2441 chan_increment = 4; 2442 break; 2443 case NL80211_BAND_6GHZ: 2444 /* 2445 * In the 6 GHz band, the "maximum transmit power level" 2446 * field in the triplets is reserved, and thus will be 2447 * zero and we shouldn't use it to control TX power. 2448 * The actual TX power will be given in the transmit 2449 * power envelope element instead. 2450 */ 2451 return false; 2452 } 2453 2454 /* find channel */ 2455 while (country_ie_len >= 3) { 2456 u8 first_channel = triplet->chans.first_channel; 2457 2458 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2459 goto next; 2460 2461 for (i = 0; i < triplet->chans.num_channels; i++) { 2462 if (first_channel + i * chan_increment == chan) { 2463 have_chan_pwr = true; 2464 *chan_pwr = triplet->chans.max_power; 2465 break; 2466 } 2467 } 2468 if (have_chan_pwr) 2469 break; 2470 2471 next: 2472 triplet++; 2473 country_ie_len -= 3; 2474 } 2475 2476 if (have_chan_pwr && pwr_constr_elem) 2477 *pwr_reduction = *pwr_constr_elem; 2478 else 2479 *pwr_reduction = 0; 2480 2481 return have_chan_pwr; 2482 } 2483 2484 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2485 struct ieee80211_channel *channel, 2486 const u8 *cisco_dtpc_ie, 2487 int *pwr_level) 2488 { 2489 /* From practical testing, the first data byte of the DTPC element 2490 * seems to contain the requested dBm level, and the CLI on Cisco 2491 * APs clearly state the range is -127 to 127 dBm, which indicates 2492 * a signed byte, although it seemingly never actually goes negative. 2493 * The other byte seems to always be zero. 2494 */ 2495 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2496 } 2497 2498 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2499 struct ieee80211_channel *channel, 2500 struct ieee80211_mgmt *mgmt, 2501 const u8 *country_ie, u8 country_ie_len, 2502 const u8 *pwr_constr_ie, 2503 const u8 *cisco_dtpc_ie) 2504 { 2505 struct ieee80211_sub_if_data *sdata = link->sdata; 2506 bool has_80211h_pwr = false, has_cisco_pwr = false; 2507 int chan_pwr = 0, pwr_reduction_80211h = 0; 2508 int pwr_level_cisco, pwr_level_80211h; 2509 int new_ap_level; 2510 __le16 capab = mgmt->u.probe_resp.capab_info; 2511 2512 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2513 return 0; /* TODO */ 2514 2515 if (country_ie && 2516 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2517 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2518 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2519 sdata, channel, country_ie, country_ie_len, 2520 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2521 pwr_level_80211h = 2522 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2523 } 2524 2525 if (cisco_dtpc_ie) { 2526 ieee80211_find_cisco_dtpc( 2527 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2528 has_cisco_pwr = true; 2529 } 2530 2531 if (!has_80211h_pwr && !has_cisco_pwr) 2532 return 0; 2533 2534 /* If we have both 802.11h and Cisco DTPC, apply both limits 2535 * by picking the smallest of the two power levels advertised. 2536 */ 2537 if (has_80211h_pwr && 2538 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2539 new_ap_level = pwr_level_80211h; 2540 2541 if (link->ap_power_level == new_ap_level) 2542 return 0; 2543 2544 sdata_dbg(sdata, 2545 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2546 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2547 link->u.mgd.bssid); 2548 } else { /* has_cisco_pwr is always true here. */ 2549 new_ap_level = pwr_level_cisco; 2550 2551 if (link->ap_power_level == new_ap_level) 2552 return 0; 2553 2554 sdata_dbg(sdata, 2555 "Limiting TX power to %d dBm as advertised by %pM\n", 2556 pwr_level_cisco, link->u.mgd.bssid); 2557 } 2558 2559 link->ap_power_level = new_ap_level; 2560 if (__ieee80211_recalc_txpower(sdata)) 2561 return BSS_CHANGED_TXPOWER; 2562 return 0; 2563 } 2564 2565 /* powersave */ 2566 static void ieee80211_enable_ps(struct ieee80211_local *local, 2567 struct ieee80211_sub_if_data *sdata) 2568 { 2569 struct ieee80211_conf *conf = &local->hw.conf; 2570 2571 /* 2572 * If we are scanning right now then the parameters will 2573 * take effect when scan finishes. 2574 */ 2575 if (local->scanning) 2576 return; 2577 2578 if (conf->dynamic_ps_timeout > 0 && 2579 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2580 mod_timer(&local->dynamic_ps_timer, jiffies + 2581 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2582 } else { 2583 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2584 ieee80211_send_nullfunc(local, sdata, true); 2585 2586 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2587 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2588 return; 2589 2590 conf->flags |= IEEE80211_CONF_PS; 2591 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2592 } 2593 } 2594 2595 static void ieee80211_change_ps(struct ieee80211_local *local) 2596 { 2597 struct ieee80211_conf *conf = &local->hw.conf; 2598 2599 if (local->ps_sdata) { 2600 ieee80211_enable_ps(local, local->ps_sdata); 2601 } else if (conf->flags & IEEE80211_CONF_PS) { 2602 conf->flags &= ~IEEE80211_CONF_PS; 2603 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2604 del_timer_sync(&local->dynamic_ps_timer); 2605 wiphy_work_cancel(local->hw.wiphy, 2606 &local->dynamic_ps_enable_work); 2607 } 2608 } 2609 2610 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2611 { 2612 struct ieee80211_local *local = sdata->local; 2613 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2614 struct sta_info *sta = NULL; 2615 bool authorized = false; 2616 2617 if (!mgd->powersave) 2618 return false; 2619 2620 if (mgd->broken_ap) 2621 return false; 2622 2623 if (!mgd->associated) 2624 return false; 2625 2626 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2627 return false; 2628 2629 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2630 !sdata->deflink.u.mgd.have_beacon) 2631 return false; 2632 2633 rcu_read_lock(); 2634 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2635 if (sta) 2636 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2637 rcu_read_unlock(); 2638 2639 return authorized; 2640 } 2641 2642 /* need to hold RTNL or interface lock */ 2643 void ieee80211_recalc_ps(struct ieee80211_local *local) 2644 { 2645 struct ieee80211_sub_if_data *sdata, *found = NULL; 2646 int count = 0; 2647 int timeout; 2648 2649 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2650 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2651 local->ps_sdata = NULL; 2652 return; 2653 } 2654 2655 list_for_each_entry(sdata, &local->interfaces, list) { 2656 if (!ieee80211_sdata_running(sdata)) 2657 continue; 2658 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2659 /* If an AP vif is found, then disable PS 2660 * by setting the count to zero thereby setting 2661 * ps_sdata to NULL. 2662 */ 2663 count = 0; 2664 break; 2665 } 2666 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2667 continue; 2668 found = sdata; 2669 count++; 2670 } 2671 2672 if (count == 1 && ieee80211_powersave_allowed(found)) { 2673 u8 dtimper = found->deflink.u.mgd.dtim_period; 2674 2675 timeout = local->dynamic_ps_forced_timeout; 2676 if (timeout < 0) 2677 timeout = 100; 2678 local->hw.conf.dynamic_ps_timeout = timeout; 2679 2680 /* If the TIM IE is invalid, pretend the value is 1 */ 2681 if (!dtimper) 2682 dtimper = 1; 2683 2684 local->hw.conf.ps_dtim_period = dtimper; 2685 local->ps_sdata = found; 2686 } else { 2687 local->ps_sdata = NULL; 2688 } 2689 2690 ieee80211_change_ps(local); 2691 } 2692 2693 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2694 { 2695 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2696 2697 if (sdata->vif.cfg.ps != ps_allowed) { 2698 sdata->vif.cfg.ps = ps_allowed; 2699 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2700 } 2701 } 2702 2703 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2704 struct wiphy_work *work) 2705 { 2706 struct ieee80211_local *local = 2707 container_of(work, struct ieee80211_local, 2708 dynamic_ps_disable_work); 2709 2710 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2711 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2712 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2713 } 2714 2715 ieee80211_wake_queues_by_reason(&local->hw, 2716 IEEE80211_MAX_QUEUE_MAP, 2717 IEEE80211_QUEUE_STOP_REASON_PS, 2718 false); 2719 } 2720 2721 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2722 struct wiphy_work *work) 2723 { 2724 struct ieee80211_local *local = 2725 container_of(work, struct ieee80211_local, 2726 dynamic_ps_enable_work); 2727 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2728 struct ieee80211_if_managed *ifmgd; 2729 unsigned long flags; 2730 int q; 2731 2732 /* can only happen when PS was just disabled anyway */ 2733 if (!sdata) 2734 return; 2735 2736 ifmgd = &sdata->u.mgd; 2737 2738 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2739 return; 2740 2741 if (local->hw.conf.dynamic_ps_timeout > 0) { 2742 /* don't enter PS if TX frames are pending */ 2743 if (drv_tx_frames_pending(local)) { 2744 mod_timer(&local->dynamic_ps_timer, jiffies + 2745 msecs_to_jiffies( 2746 local->hw.conf.dynamic_ps_timeout)); 2747 return; 2748 } 2749 2750 /* 2751 * transmission can be stopped by others which leads to 2752 * dynamic_ps_timer expiry. Postpone the ps timer if it 2753 * is not the actual idle state. 2754 */ 2755 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2756 for (q = 0; q < local->hw.queues; q++) { 2757 if (local->queue_stop_reasons[q]) { 2758 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2759 flags); 2760 mod_timer(&local->dynamic_ps_timer, jiffies + 2761 msecs_to_jiffies( 2762 local->hw.conf.dynamic_ps_timeout)); 2763 return; 2764 } 2765 } 2766 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2767 } 2768 2769 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2770 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2771 if (drv_tx_frames_pending(local)) { 2772 mod_timer(&local->dynamic_ps_timer, jiffies + 2773 msecs_to_jiffies( 2774 local->hw.conf.dynamic_ps_timeout)); 2775 } else { 2776 ieee80211_send_nullfunc(local, sdata, true); 2777 /* Flush to get the tx status of nullfunc frame */ 2778 ieee80211_flush_queues(local, sdata, false); 2779 } 2780 } 2781 2782 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2783 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2784 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2785 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2786 local->hw.conf.flags |= IEEE80211_CONF_PS; 2787 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2788 } 2789 } 2790 2791 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2792 { 2793 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2794 2795 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 2796 } 2797 2798 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 2799 { 2800 struct ieee80211_link_data *link = 2801 container_of(work, struct ieee80211_link_data, 2802 dfs_cac_timer_work.work); 2803 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 2804 struct ieee80211_sub_if_data *sdata = link->sdata; 2805 2806 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2807 2808 if (sdata->wdev.cac_started) { 2809 ieee80211_link_release_channel(link); 2810 cfg80211_cac_event(sdata->dev, &chandef, 2811 NL80211_RADAR_CAC_FINISHED, 2812 GFP_KERNEL); 2813 } 2814 } 2815 2816 static bool 2817 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2818 { 2819 struct ieee80211_local *local = sdata->local; 2820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2821 bool ret = false; 2822 int ac; 2823 2824 if (local->hw.queues < IEEE80211_NUM_ACS) 2825 return false; 2826 2827 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2828 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2829 int non_acm_ac; 2830 unsigned long now = jiffies; 2831 2832 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2833 tx_tspec->admitted_time && 2834 time_after(now, tx_tspec->time_slice_start + HZ)) { 2835 tx_tspec->consumed_tx_time = 0; 2836 tx_tspec->time_slice_start = now; 2837 2838 if (tx_tspec->downgraded) 2839 tx_tspec->action = 2840 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2841 } 2842 2843 switch (tx_tspec->action) { 2844 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2845 /* take the original parameters */ 2846 if (drv_conf_tx(local, &sdata->deflink, ac, 2847 &sdata->deflink.tx_conf[ac])) 2848 link_err(&sdata->deflink, 2849 "failed to set TX queue parameters for queue %d\n", 2850 ac); 2851 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2852 tx_tspec->downgraded = false; 2853 ret = true; 2854 break; 2855 case TX_TSPEC_ACTION_DOWNGRADE: 2856 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2857 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2858 ret = true; 2859 break; 2860 } 2861 /* downgrade next lower non-ACM AC */ 2862 for (non_acm_ac = ac + 1; 2863 non_acm_ac < IEEE80211_NUM_ACS; 2864 non_acm_ac++) 2865 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2866 break; 2867 /* Usually the loop will result in using BK even if it 2868 * requires admission control, but such a configuration 2869 * makes no sense and we have to transmit somehow - the 2870 * AC selection does the same thing. 2871 * If we started out trying to downgrade from BK, then 2872 * the extra condition here might be needed. 2873 */ 2874 if (non_acm_ac >= IEEE80211_NUM_ACS) 2875 non_acm_ac = IEEE80211_AC_BK; 2876 if (drv_conf_tx(local, &sdata->deflink, ac, 2877 &sdata->deflink.tx_conf[non_acm_ac])) 2878 link_err(&sdata->deflink, 2879 "failed to set TX queue parameters for queue %d\n", 2880 ac); 2881 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2882 ret = true; 2883 wiphy_delayed_work_queue(local->hw.wiphy, 2884 &ifmgd->tx_tspec_wk, 2885 tx_tspec->time_slice_start + 2886 HZ - now + 1); 2887 break; 2888 case TX_TSPEC_ACTION_NONE: 2889 /* nothing now */ 2890 break; 2891 } 2892 } 2893 2894 return ret; 2895 } 2896 2897 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2898 { 2899 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2900 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2901 BSS_CHANGED_QOS); 2902 } 2903 2904 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 2905 struct wiphy_work *work) 2906 { 2907 struct ieee80211_sub_if_data *sdata; 2908 2909 sdata = container_of(work, struct ieee80211_sub_if_data, 2910 u.mgd.tx_tspec_wk.work); 2911 ieee80211_sta_handle_tspec_ac_params(sdata); 2912 } 2913 2914 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2915 { 2916 struct ieee80211_sub_if_data *sdata = link->sdata; 2917 struct ieee80211_local *local = sdata->local; 2918 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2919 struct ieee80211_tx_queue_params *params = link->tx_conf; 2920 u8 ac; 2921 2922 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2923 mlme_dbg(sdata, 2924 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2925 ac, params[ac].acm, 2926 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2927 params[ac].txop, params[ac].uapsd, 2928 ifmgd->tx_tspec[ac].downgraded); 2929 if (!ifmgd->tx_tspec[ac].downgraded && 2930 drv_conf_tx(local, link, ac, ¶ms[ac])) 2931 link_err(link, 2932 "failed to set TX queue parameters for AC %d\n", 2933 ac); 2934 } 2935 } 2936 2937 /* MLME */ 2938 static bool 2939 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2940 struct ieee80211_link_data *link, 2941 const u8 *wmm_param, size_t wmm_param_len, 2942 const struct ieee80211_mu_edca_param_set *mu_edca) 2943 { 2944 struct ieee80211_sub_if_data *sdata = link->sdata; 2945 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2946 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2947 size_t left; 2948 int count, mu_edca_count, ac; 2949 const u8 *pos; 2950 u8 uapsd_queues = 0; 2951 2952 if (!local->ops->conf_tx) 2953 return false; 2954 2955 if (local->hw.queues < IEEE80211_NUM_ACS) 2956 return false; 2957 2958 if (!wmm_param) 2959 return false; 2960 2961 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2962 return false; 2963 2964 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2965 uapsd_queues = ifmgd->uapsd_queues; 2966 2967 count = wmm_param[6] & 0x0f; 2968 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2969 * if mu_edca was preset before and now it disappeared tell 2970 * the driver about it. 2971 */ 2972 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2973 if (count == link->u.mgd.wmm_last_param_set && 2974 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2975 return false; 2976 link->u.mgd.wmm_last_param_set = count; 2977 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2978 2979 pos = wmm_param + 8; 2980 left = wmm_param_len - 8; 2981 2982 memset(¶ms, 0, sizeof(params)); 2983 2984 sdata->wmm_acm = 0; 2985 for (; left >= 4; left -= 4, pos += 4) { 2986 int aci = (pos[0] >> 5) & 0x03; 2987 int acm = (pos[0] >> 4) & 0x01; 2988 bool uapsd = false; 2989 2990 switch (aci) { 2991 case 1: /* AC_BK */ 2992 ac = IEEE80211_AC_BK; 2993 if (acm) 2994 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2995 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2996 uapsd = true; 2997 params[ac].mu_edca = !!mu_edca; 2998 if (mu_edca) 2999 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3000 break; 3001 case 2: /* AC_VI */ 3002 ac = IEEE80211_AC_VI; 3003 if (acm) 3004 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3005 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3006 uapsd = true; 3007 params[ac].mu_edca = !!mu_edca; 3008 if (mu_edca) 3009 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3010 break; 3011 case 3: /* AC_VO */ 3012 ac = IEEE80211_AC_VO; 3013 if (acm) 3014 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3015 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3016 uapsd = true; 3017 params[ac].mu_edca = !!mu_edca; 3018 if (mu_edca) 3019 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3020 break; 3021 case 0: /* AC_BE */ 3022 default: 3023 ac = IEEE80211_AC_BE; 3024 if (acm) 3025 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3026 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3027 uapsd = true; 3028 params[ac].mu_edca = !!mu_edca; 3029 if (mu_edca) 3030 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3031 break; 3032 } 3033 3034 params[ac].aifs = pos[0] & 0x0f; 3035 3036 if (params[ac].aifs < 2) { 3037 link_info(link, 3038 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3039 params[ac].aifs, aci); 3040 params[ac].aifs = 2; 3041 } 3042 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3043 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3044 params[ac].txop = get_unaligned_le16(pos + 2); 3045 params[ac].acm = acm; 3046 params[ac].uapsd = uapsd; 3047 3048 if (params[ac].cw_min == 0 || 3049 params[ac].cw_min > params[ac].cw_max) { 3050 link_info(link, 3051 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3052 params[ac].cw_min, params[ac].cw_max, aci); 3053 return false; 3054 } 3055 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3056 } 3057 3058 /* WMM specification requires all 4 ACIs. */ 3059 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3060 if (params[ac].cw_min == 0) { 3061 link_info(link, 3062 "AP has invalid WMM params (missing AC %d), using defaults\n", 3063 ac); 3064 return false; 3065 } 3066 } 3067 3068 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3069 link->tx_conf[ac] = params[ac]; 3070 3071 ieee80211_mgd_set_link_qos_params(link); 3072 3073 /* enable WMM or activate new settings */ 3074 link->conf->qos = true; 3075 return true; 3076 } 3077 3078 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3079 { 3080 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3081 3082 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3083 ieee80211_run_deferred_scan(sdata->local); 3084 } 3085 3086 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3087 { 3088 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3089 3090 __ieee80211_stop_poll(sdata); 3091 } 3092 3093 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3094 u16 capab, bool erp_valid, u8 erp) 3095 { 3096 struct ieee80211_bss_conf *bss_conf = link->conf; 3097 struct ieee80211_supported_band *sband; 3098 u64 changed = 0; 3099 bool use_protection; 3100 bool use_short_preamble; 3101 bool use_short_slot; 3102 3103 sband = ieee80211_get_link_sband(link); 3104 if (!sband) 3105 return changed; 3106 3107 if (erp_valid) { 3108 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3109 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3110 } else { 3111 use_protection = false; 3112 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3113 } 3114 3115 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3116 if (sband->band == NL80211_BAND_5GHZ || 3117 sband->band == NL80211_BAND_6GHZ) 3118 use_short_slot = true; 3119 3120 if (use_protection != bss_conf->use_cts_prot) { 3121 bss_conf->use_cts_prot = use_protection; 3122 changed |= BSS_CHANGED_ERP_CTS_PROT; 3123 } 3124 3125 if (use_short_preamble != bss_conf->use_short_preamble) { 3126 bss_conf->use_short_preamble = use_short_preamble; 3127 changed |= BSS_CHANGED_ERP_PREAMBLE; 3128 } 3129 3130 if (use_short_slot != bss_conf->use_short_slot) { 3131 bss_conf->use_short_slot = use_short_slot; 3132 changed |= BSS_CHANGED_ERP_SLOT; 3133 } 3134 3135 return changed; 3136 } 3137 3138 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3139 struct cfg80211_bss *cbss) 3140 { 3141 struct ieee80211_sub_if_data *sdata = link->sdata; 3142 struct ieee80211_bss_conf *bss_conf = link->conf; 3143 struct ieee80211_bss *bss = (void *)cbss->priv; 3144 u64 changed = BSS_CHANGED_QOS; 3145 3146 /* not really used in MLO */ 3147 sdata->u.mgd.beacon_timeout = 3148 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3149 bss_conf->beacon_int)); 3150 3151 changed |= ieee80211_handle_bss_capability(link, 3152 bss_conf->assoc_capability, 3153 bss->has_erp_value, 3154 bss->erp_value); 3155 3156 ieee80211_check_rate_mask(link); 3157 3158 link->conf->bss = cbss; 3159 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3160 3161 if (sdata->vif.p2p || 3162 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3163 const struct cfg80211_bss_ies *ies; 3164 3165 rcu_read_lock(); 3166 ies = rcu_dereference(cbss->ies); 3167 if (ies) { 3168 int ret; 3169 3170 ret = cfg80211_get_p2p_attr( 3171 ies->data, ies->len, 3172 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3173 (u8 *) &bss_conf->p2p_noa_attr, 3174 sizeof(bss_conf->p2p_noa_attr)); 3175 if (ret >= 2) { 3176 link->u.mgd.p2p_noa_index = 3177 bss_conf->p2p_noa_attr.index; 3178 changed |= BSS_CHANGED_P2P_PS; 3179 } 3180 } 3181 rcu_read_unlock(); 3182 } 3183 3184 if (link->u.mgd.have_beacon) { 3185 bss_conf->beacon_rate = bss->beacon_rate; 3186 changed |= BSS_CHANGED_BEACON_INFO; 3187 } else { 3188 bss_conf->beacon_rate = NULL; 3189 } 3190 3191 /* Tell the driver to monitor connection quality (if supported) */ 3192 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3193 bss_conf->cqm_rssi_thold) 3194 changed |= BSS_CHANGED_CQM; 3195 3196 return changed; 3197 } 3198 3199 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3200 struct ieee80211_mgd_assoc_data *assoc_data, 3201 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3202 { 3203 struct ieee80211_local *local = sdata->local; 3204 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3205 u64 vif_changed = BSS_CHANGED_ASSOC; 3206 unsigned int link_id; 3207 3208 lockdep_assert_wiphy(local->hw.wiphy); 3209 3210 sdata->u.mgd.associated = true; 3211 3212 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3213 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3214 struct ieee80211_link_data *link; 3215 3216 if (!cbss || 3217 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3218 continue; 3219 3220 if (ieee80211_vif_is_mld(&sdata->vif) && 3221 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3222 continue; 3223 3224 link = sdata_dereference(sdata->link[link_id], sdata); 3225 if (WARN_ON(!link)) 3226 return; 3227 3228 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3229 } 3230 3231 /* just to be sure */ 3232 ieee80211_stop_poll(sdata); 3233 3234 ieee80211_led_assoc(local, 1); 3235 3236 vif_cfg->assoc = 1; 3237 3238 /* Enable ARP filtering */ 3239 if (vif_cfg->arp_addr_cnt) 3240 vif_changed |= BSS_CHANGED_ARP_FILTER; 3241 3242 if (ieee80211_vif_is_mld(&sdata->vif)) { 3243 for (link_id = 0; 3244 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3245 link_id++) { 3246 struct ieee80211_link_data *link; 3247 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3248 3249 if (!cbss || 3250 !(BIT(link_id) & 3251 ieee80211_vif_usable_links(&sdata->vif)) || 3252 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3253 continue; 3254 3255 link = sdata_dereference(sdata->link[link_id], sdata); 3256 if (WARN_ON(!link)) 3257 return; 3258 3259 ieee80211_link_info_change_notify(sdata, link, 3260 changed[link_id]); 3261 3262 ieee80211_recalc_smps(sdata, link); 3263 } 3264 3265 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3266 } else { 3267 ieee80211_bss_info_change_notify(sdata, 3268 vif_changed | changed[0]); 3269 } 3270 3271 ieee80211_recalc_ps(local); 3272 3273 /* leave this here to not change ordering in non-MLO cases */ 3274 if (!ieee80211_vif_is_mld(&sdata->vif)) 3275 ieee80211_recalc_smps(sdata, &sdata->deflink); 3276 ieee80211_recalc_ps_vif(sdata); 3277 3278 netif_carrier_on(sdata->dev); 3279 } 3280 3281 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3282 u16 stype, u16 reason, bool tx, 3283 u8 *frame_buf) 3284 { 3285 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3286 struct ieee80211_local *local = sdata->local; 3287 unsigned int link_id; 3288 u64 changed = 0; 3289 struct ieee80211_prep_tx_info info = { 3290 .subtype = stype, 3291 }; 3292 3293 lockdep_assert_wiphy(local->hw.wiphy); 3294 3295 if (WARN_ON_ONCE(tx && !frame_buf)) 3296 return; 3297 3298 if (WARN_ON(!ifmgd->associated)) 3299 return; 3300 3301 ieee80211_stop_poll(sdata); 3302 3303 ifmgd->associated = false; 3304 3305 /* other links will be destroyed */ 3306 sdata->deflink.conf->bss = NULL; 3307 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3308 3309 netif_carrier_off(sdata->dev); 3310 3311 /* 3312 * if we want to get out of ps before disassoc (why?) we have 3313 * to do it before sending disassoc, as otherwise the null-packet 3314 * won't be valid. 3315 */ 3316 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3317 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3318 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3319 } 3320 local->ps_sdata = NULL; 3321 3322 /* disable per-vif ps */ 3323 ieee80211_recalc_ps_vif(sdata); 3324 3325 /* make sure ongoing transmission finishes */ 3326 synchronize_net(); 3327 3328 /* 3329 * drop any frame before deauth/disassoc, this can be data or 3330 * management frame. Since we are disconnecting, we should not 3331 * insist sending these frames which can take time and delay 3332 * the disconnection and possible the roaming. 3333 */ 3334 if (tx) 3335 ieee80211_flush_queues(local, sdata, true); 3336 3337 /* deauthenticate/disassociate now */ 3338 if (tx || frame_buf) { 3339 /* 3340 * In multi channel scenarios guarantee that the virtual 3341 * interface is granted immediate airtime to transmit the 3342 * deauthentication frame by calling mgd_prepare_tx, if the 3343 * driver requested so. 3344 */ 3345 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 3346 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 3347 link_id++) { 3348 struct ieee80211_link_data *link; 3349 3350 link = sdata_dereference(sdata->link[link_id], 3351 sdata); 3352 if (!link) 3353 continue; 3354 if (link->u.mgd.have_beacon) 3355 break; 3356 } 3357 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 3358 info.link_id = ffs(sdata->vif.active_links) - 1; 3359 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3360 } 3361 } 3362 3363 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3364 sdata->vif.cfg.ap_addr, stype, 3365 reason, tx, frame_buf); 3366 } 3367 3368 /* flush out frame - make sure the deauth was actually sent */ 3369 if (tx) 3370 ieee80211_flush_queues(local, sdata, false); 3371 3372 drv_mgd_complete_tx(sdata->local, sdata, &info); 3373 3374 /* clear AP addr only after building the needed mgmt frames */ 3375 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3376 eth_zero_addr(sdata->vif.cfg.ap_addr); 3377 3378 sdata->vif.cfg.ssid_len = 0; 3379 3380 /* remove AP and TDLS peers */ 3381 sta_info_flush(sdata, -1); 3382 3383 /* finally reset all BSS / config parameters */ 3384 if (!ieee80211_vif_is_mld(&sdata->vif)) 3385 changed |= ieee80211_reset_erp_info(sdata); 3386 3387 ieee80211_led_assoc(local, 0); 3388 changed |= BSS_CHANGED_ASSOC; 3389 sdata->vif.cfg.assoc = false; 3390 3391 sdata->deflink.u.mgd.p2p_noa_index = -1; 3392 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3393 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3394 3395 /* on the next assoc, re-program HT/VHT parameters */ 3396 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3397 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3398 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3399 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3400 3401 /* 3402 * reset MU-MIMO ownership and group data in default link, 3403 * if used, other links are destroyed 3404 */ 3405 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3406 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3407 memset(sdata->vif.bss_conf.mu_group.position, 0, 3408 sizeof(sdata->vif.bss_conf.mu_group.position)); 3409 if (!ieee80211_vif_is_mld(&sdata->vif)) 3410 changed |= BSS_CHANGED_MU_GROUPS; 3411 sdata->vif.bss_conf.mu_mimo_owner = false; 3412 3413 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3414 3415 del_timer_sync(&local->dynamic_ps_timer); 3416 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3417 3418 /* Disable ARP filtering */ 3419 if (sdata->vif.cfg.arp_addr_cnt) 3420 changed |= BSS_CHANGED_ARP_FILTER; 3421 3422 sdata->vif.bss_conf.qos = false; 3423 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3424 changed |= BSS_CHANGED_QOS; 3425 /* The BSSID (not really interesting) and HT changed */ 3426 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3427 ieee80211_bss_info_change_notify(sdata, changed); 3428 } else { 3429 ieee80211_vif_cfg_change_notify(sdata, changed); 3430 } 3431 3432 /* disassociated - set to defaults now */ 3433 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3434 3435 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3436 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3437 del_timer_sync(&sdata->u.mgd.timer); 3438 3439 sdata->vif.bss_conf.dtim_period = 0; 3440 sdata->vif.bss_conf.beacon_rate = NULL; 3441 3442 sdata->deflink.u.mgd.have_beacon = false; 3443 sdata->deflink.u.mgd.tracking_signal_avg = false; 3444 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3445 3446 ifmgd->flags = 0; 3447 3448 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3449 struct ieee80211_link_data *link; 3450 3451 link = sdata_dereference(sdata->link[link_id], sdata); 3452 if (!link) 3453 continue; 3454 ieee80211_link_release_channel(link); 3455 } 3456 3457 sdata->vif.bss_conf.csa_active = false; 3458 sdata->deflink.u.mgd.csa_blocked_tx = false; 3459 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3460 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3461 if (sdata->csa_blocked_queues) { 3462 ieee80211_wake_vif_queues(local, sdata, 3463 IEEE80211_QUEUE_STOP_REASON_CSA); 3464 sdata->csa_blocked_queues = false; 3465 } 3466 3467 /* existing TX TSPEC sessions no longer exist */ 3468 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3469 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3470 3471 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3472 sdata->vif.bss_conf.pwr_reduction = 0; 3473 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3474 3475 sdata->vif.cfg.eml_cap = 0; 3476 sdata->vif.cfg.eml_med_sync_delay = 0; 3477 sdata->vif.cfg.mld_capa_op = 0; 3478 3479 memset(&sdata->u.mgd.ttlm_info, 0, 3480 sizeof(sdata->u.mgd.ttlm_info)); 3481 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3482 3483 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3484 &ifmgd->neg_ttlm_timeout_work); 3485 ieee80211_vif_set_links(sdata, 0, 0); 3486 3487 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3488 } 3489 3490 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3491 { 3492 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3493 struct ieee80211_local *local = sdata->local; 3494 3495 lockdep_assert_wiphy(local->hw.wiphy); 3496 3497 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3498 return; 3499 3500 __ieee80211_stop_poll(sdata); 3501 3502 ieee80211_recalc_ps(local); 3503 3504 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3505 return; 3506 3507 /* 3508 * We've received a probe response, but are not sure whether 3509 * we have or will be receiving any beacons or data, so let's 3510 * schedule the timers again, just in case. 3511 */ 3512 ieee80211_sta_reset_beacon_monitor(sdata); 3513 3514 mod_timer(&ifmgd->conn_mon_timer, 3515 round_jiffies_up(jiffies + 3516 IEEE80211_CONNECTION_IDLE_TIME)); 3517 } 3518 3519 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3520 struct ieee80211_hdr *hdr, 3521 u16 tx_time) 3522 { 3523 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3524 u16 tid; 3525 int ac; 3526 struct ieee80211_sta_tx_tspec *tx_tspec; 3527 unsigned long now = jiffies; 3528 3529 if (!ieee80211_is_data_qos(hdr->frame_control)) 3530 return; 3531 3532 tid = ieee80211_get_tid(hdr); 3533 ac = ieee80211_ac_from_tid(tid); 3534 tx_tspec = &ifmgd->tx_tspec[ac]; 3535 3536 if (likely(!tx_tspec->admitted_time)) 3537 return; 3538 3539 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3540 tx_tspec->consumed_tx_time = 0; 3541 tx_tspec->time_slice_start = now; 3542 3543 if (tx_tspec->downgraded) { 3544 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3545 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3546 &ifmgd->tx_tspec_wk, 0); 3547 } 3548 } 3549 3550 if (tx_tspec->downgraded) 3551 return; 3552 3553 tx_tspec->consumed_tx_time += tx_time; 3554 3555 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3556 tx_tspec->downgraded = true; 3557 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3558 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3559 &ifmgd->tx_tspec_wk, 0); 3560 } 3561 } 3562 3563 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3564 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3565 { 3566 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3567 3568 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3569 !sdata->u.mgd.probe_send_count) 3570 return; 3571 3572 if (ack) 3573 sdata->u.mgd.probe_send_count = 0; 3574 else 3575 sdata->u.mgd.nullfunc_failed = true; 3576 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3577 } 3578 3579 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3580 const u8 *src, const u8 *dst, 3581 const u8 *ssid, size_t ssid_len, 3582 struct ieee80211_channel *channel) 3583 { 3584 struct sk_buff *skb; 3585 3586 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3587 ssid, ssid_len, NULL, 0, 3588 IEEE80211_PROBE_FLAG_DIRECTED); 3589 if (skb) 3590 ieee80211_tx_skb(sdata, skb); 3591 } 3592 3593 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3594 { 3595 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3596 u8 *dst = sdata->vif.cfg.ap_addr; 3597 u8 unicast_limit = max(1, max_probe_tries - 3); 3598 struct sta_info *sta; 3599 3600 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3601 3602 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3603 return; 3604 3605 /* 3606 * Try sending broadcast probe requests for the last three 3607 * probe requests after the first ones failed since some 3608 * buggy APs only support broadcast probe requests. 3609 */ 3610 if (ifmgd->probe_send_count >= unicast_limit) 3611 dst = NULL; 3612 3613 /* 3614 * When the hardware reports an accurate Tx ACK status, it's 3615 * better to send a nullfunc frame instead of a probe request, 3616 * as it will kick us off the AP quickly if we aren't associated 3617 * anymore. The timeout will be reset if the frame is ACKed by 3618 * the AP. 3619 */ 3620 ifmgd->probe_send_count++; 3621 3622 if (dst) { 3623 sta = sta_info_get(sdata, dst); 3624 if (!WARN_ON(!sta)) 3625 ieee80211_check_fast_rx(sta); 3626 } 3627 3628 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3629 ifmgd->nullfunc_failed = false; 3630 ieee80211_send_nullfunc(sdata->local, sdata, false); 3631 } else { 3632 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3633 sdata->vif.cfg.ssid, 3634 sdata->vif.cfg.ssid_len, 3635 sdata->deflink.conf->bss->channel); 3636 } 3637 3638 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3639 run_again(sdata, ifmgd->probe_timeout); 3640 } 3641 3642 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3643 bool beacon) 3644 { 3645 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3646 bool already = false; 3647 3648 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3649 3650 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3651 return; 3652 3653 if (!ieee80211_sdata_running(sdata)) 3654 return; 3655 3656 if (!ifmgd->associated) 3657 return; 3658 3659 if (sdata->local->tmp_channel || sdata->local->scanning) 3660 return; 3661 3662 if (sdata->local->suspending) { 3663 /* reschedule after resume */ 3664 ieee80211_reset_ap_probe(sdata); 3665 return; 3666 } 3667 3668 if (beacon) { 3669 mlme_dbg_ratelimited(sdata, 3670 "detected beacon loss from AP (missed %d beacons) - probing\n", 3671 beacon_loss_count); 3672 3673 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3674 } 3675 3676 /* 3677 * The driver/our work has already reported this event or the 3678 * connection monitoring has kicked in and we have already sent 3679 * a probe request. Or maybe the AP died and the driver keeps 3680 * reporting until we disassociate... 3681 * 3682 * In either case we have to ignore the current call to this 3683 * function (except for setting the correct probe reason bit) 3684 * because otherwise we would reset the timer every time and 3685 * never check whether we received a probe response! 3686 */ 3687 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3688 already = true; 3689 3690 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3691 3692 if (already) 3693 return; 3694 3695 ieee80211_recalc_ps(sdata->local); 3696 3697 ifmgd->probe_send_count = 0; 3698 ieee80211_mgd_probe_ap_send(sdata); 3699 } 3700 3701 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3702 struct ieee80211_vif *vif) 3703 { 3704 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3705 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3706 struct cfg80211_bss *cbss; 3707 struct sk_buff *skb; 3708 const struct element *ssid; 3709 int ssid_len; 3710 3711 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3712 3713 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3714 ieee80211_vif_is_mld(&sdata->vif))) 3715 return NULL; 3716 3717 if (ifmgd->associated) 3718 cbss = sdata->deflink.conf->bss; 3719 else if (ifmgd->auth_data) 3720 cbss = ifmgd->auth_data->bss; 3721 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3722 cbss = ifmgd->assoc_data->link[0].bss; 3723 else 3724 return NULL; 3725 3726 rcu_read_lock(); 3727 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3728 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3729 "invalid SSID element (len=%d)", 3730 ssid ? ssid->datalen : -1)) 3731 ssid_len = 0; 3732 else 3733 ssid_len = ssid->datalen; 3734 3735 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3736 (u32) -1, cbss->channel, 3737 ssid->data, ssid_len, 3738 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3739 rcu_read_unlock(); 3740 3741 return skb; 3742 } 3743 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3744 3745 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3746 const u8 *buf, size_t len, bool tx, 3747 u16 reason, bool reconnect) 3748 { 3749 struct ieee80211_event event = { 3750 .type = MLME_EVENT, 3751 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3752 .u.mlme.reason = reason, 3753 }; 3754 3755 if (tx) 3756 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3757 else 3758 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3759 3760 drv_event_callback(sdata->local, sdata, &event); 3761 } 3762 3763 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3764 { 3765 struct ieee80211_local *local = sdata->local; 3766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3767 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3768 bool tx = false; 3769 3770 lockdep_assert_wiphy(local->hw.wiphy); 3771 3772 if (!ifmgd->associated) 3773 return; 3774 3775 /* only transmit if we have a link that makes that worthwhile */ 3776 for (unsigned int link_id = 0; 3777 link_id < ARRAY_SIZE(sdata->link); 3778 link_id++) { 3779 struct ieee80211_link_data *link; 3780 3781 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 3782 continue; 3783 3784 link = sdata_dereference(sdata->link[link_id], sdata); 3785 if (WARN_ON_ONCE(!link)) 3786 continue; 3787 3788 if (link->u.mgd.csa_blocked_tx) 3789 continue; 3790 3791 tx = true; 3792 break; 3793 } 3794 3795 if (!ifmgd->driver_disconnect) { 3796 unsigned int link_id; 3797 3798 /* 3799 * AP is probably out of range (or not reachable for another 3800 * reason) so remove the bss structs for that AP. In the case 3801 * of multi-link, it's not clear that all of them really are 3802 * out of range, but if they weren't the driver likely would 3803 * have switched to just have a single link active? 3804 */ 3805 for (link_id = 0; 3806 link_id < ARRAY_SIZE(sdata->link); 3807 link_id++) { 3808 struct ieee80211_link_data *link; 3809 3810 link = sdata_dereference(sdata->link[link_id], sdata); 3811 if (!link) 3812 continue; 3813 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 3814 link->conf->bss = NULL; 3815 } 3816 } 3817 3818 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3819 ifmgd->driver_disconnect ? 3820 WLAN_REASON_DEAUTH_LEAVING : 3821 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3822 tx, frame_buf); 3823 /* the other links will be destroyed */ 3824 sdata->vif.bss_conf.csa_active = false; 3825 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3826 sdata->deflink.u.mgd.csa_blocked_tx = false; 3827 if (sdata->csa_blocked_queues) { 3828 ieee80211_wake_vif_queues(local, sdata, 3829 IEEE80211_QUEUE_STOP_REASON_CSA); 3830 sdata->csa_blocked_queues = false; 3831 } 3832 3833 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3834 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3835 ifmgd->reconnect); 3836 ifmgd->reconnect = false; 3837 } 3838 3839 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3840 struct wiphy_work *work) 3841 { 3842 struct ieee80211_sub_if_data *sdata = 3843 container_of(work, struct ieee80211_sub_if_data, 3844 u.mgd.beacon_connection_loss_work); 3845 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3846 3847 if (ifmgd->connection_loss) { 3848 sdata_info(sdata, "Connection to AP %pM lost\n", 3849 sdata->vif.cfg.ap_addr); 3850 __ieee80211_disconnect(sdata); 3851 ifmgd->connection_loss = false; 3852 } else if (ifmgd->driver_disconnect) { 3853 sdata_info(sdata, 3854 "Driver requested disconnection from AP %pM\n", 3855 sdata->vif.cfg.ap_addr); 3856 __ieee80211_disconnect(sdata); 3857 ifmgd->driver_disconnect = false; 3858 } else { 3859 if (ifmgd->associated) 3860 sdata->deflink.u.mgd.beacon_loss_count++; 3861 ieee80211_mgd_probe_ap(sdata, true); 3862 } 3863 } 3864 3865 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3866 struct wiphy_work *work) 3867 { 3868 struct ieee80211_sub_if_data *sdata = 3869 container_of(work, struct ieee80211_sub_if_data, 3870 u.mgd.csa_connection_drop_work); 3871 3872 __ieee80211_disconnect(sdata); 3873 } 3874 3875 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3876 { 3877 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3878 struct ieee80211_hw *hw = &sdata->local->hw; 3879 3880 trace_api_beacon_loss(sdata); 3881 3882 sdata->u.mgd.connection_loss = false; 3883 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3884 } 3885 EXPORT_SYMBOL(ieee80211_beacon_loss); 3886 3887 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3888 { 3889 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3890 struct ieee80211_hw *hw = &sdata->local->hw; 3891 3892 trace_api_connection_loss(sdata); 3893 3894 sdata->u.mgd.connection_loss = true; 3895 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3896 } 3897 EXPORT_SYMBOL(ieee80211_connection_loss); 3898 3899 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3900 { 3901 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3902 struct ieee80211_hw *hw = &sdata->local->hw; 3903 3904 trace_api_disconnect(sdata, reconnect); 3905 3906 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3907 return; 3908 3909 sdata->u.mgd.driver_disconnect = true; 3910 sdata->u.mgd.reconnect = reconnect; 3911 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3912 } 3913 EXPORT_SYMBOL(ieee80211_disconnect); 3914 3915 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3916 bool assoc) 3917 { 3918 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3919 3920 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3921 3922 if (!assoc) { 3923 /* 3924 * we are not authenticated yet, the only timer that could be 3925 * running is the timeout for the authentication response which 3926 * which is not relevant anymore. 3927 */ 3928 del_timer_sync(&sdata->u.mgd.timer); 3929 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3930 3931 /* other links are destroyed */ 3932 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3933 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3934 BSS_CHANGED_BSSID); 3935 sdata->u.mgd.flags = 0; 3936 3937 ieee80211_link_release_channel(&sdata->deflink); 3938 ieee80211_vif_set_links(sdata, 0, 0); 3939 } 3940 3941 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3942 kfree(auth_data); 3943 sdata->u.mgd.auth_data = NULL; 3944 } 3945 3946 enum assoc_status { 3947 ASSOC_SUCCESS, 3948 ASSOC_REJECTED, 3949 ASSOC_TIMEOUT, 3950 ASSOC_ABANDON, 3951 }; 3952 3953 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3954 enum assoc_status status) 3955 { 3956 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3957 3958 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3959 3960 if (status != ASSOC_SUCCESS) { 3961 /* 3962 * we are not associated yet, the only timer that could be 3963 * running is the timeout for the association response which 3964 * which is not relevant anymore. 3965 */ 3966 del_timer_sync(&sdata->u.mgd.timer); 3967 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3968 3969 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3970 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3971 BSS_CHANGED_BSSID); 3972 sdata->u.mgd.flags = 0; 3973 sdata->vif.bss_conf.mu_mimo_owner = false; 3974 3975 if (status != ASSOC_REJECTED) { 3976 struct cfg80211_assoc_failure data = { 3977 .timeout = status == ASSOC_TIMEOUT, 3978 }; 3979 int i; 3980 3981 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3982 ARRAY_SIZE(assoc_data->link)); 3983 3984 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3985 data.bss[i] = assoc_data->link[i].bss; 3986 3987 if (ieee80211_vif_is_mld(&sdata->vif)) 3988 data.ap_mld_addr = assoc_data->ap_addr; 3989 3990 cfg80211_assoc_failure(sdata->dev, &data); 3991 } 3992 3993 ieee80211_link_release_channel(&sdata->deflink); 3994 ieee80211_vif_set_links(sdata, 0, 0); 3995 } 3996 3997 kfree(assoc_data); 3998 sdata->u.mgd.assoc_data = NULL; 3999 } 4000 4001 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4002 struct ieee80211_mgmt *mgmt, size_t len) 4003 { 4004 struct ieee80211_local *local = sdata->local; 4005 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4006 const struct element *challenge; 4007 u8 *pos; 4008 u32 tx_flags = 0; 4009 struct ieee80211_prep_tx_info info = { 4010 .subtype = IEEE80211_STYPE_AUTH, 4011 .link_id = auth_data->link_id, 4012 }; 4013 4014 pos = mgmt->u.auth.variable; 4015 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4016 len - (pos - (u8 *)mgmt)); 4017 if (!challenge) 4018 return; 4019 auth_data->expected_transaction = 4; 4020 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4021 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4022 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4023 IEEE80211_TX_INTFL_MLME_CONN_TX; 4024 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4025 (void *)challenge, 4026 challenge->datalen + sizeof(*challenge), 4027 auth_data->ap_addr, auth_data->ap_addr, 4028 auth_data->key, auth_data->key_len, 4029 auth_data->key_idx, tx_flags); 4030 } 4031 4032 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4033 { 4034 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4035 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4036 struct sta_info *sta; 4037 4038 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4039 4040 sdata_info(sdata, "authenticated\n"); 4041 ifmgd->auth_data->done = true; 4042 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4043 ifmgd->auth_data->timeout_started = true; 4044 run_again(sdata, ifmgd->auth_data->timeout); 4045 4046 /* move station state to auth */ 4047 sta = sta_info_get(sdata, ap_addr); 4048 if (!sta) { 4049 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4050 return false; 4051 } 4052 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4053 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4054 return false; 4055 } 4056 4057 return true; 4058 } 4059 4060 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4061 struct ieee80211_mgmt *mgmt, size_t len) 4062 { 4063 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4064 u16 auth_alg, auth_transaction, status_code; 4065 struct ieee80211_event event = { 4066 .type = MLME_EVENT, 4067 .u.mlme.data = AUTH_EVENT, 4068 }; 4069 struct ieee80211_prep_tx_info info = { 4070 .subtype = IEEE80211_STYPE_AUTH, 4071 }; 4072 4073 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4074 4075 if (len < 24 + 6) 4076 return; 4077 4078 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4079 return; 4080 4081 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4082 return; 4083 4084 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4085 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4086 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4087 4088 if (auth_alg != ifmgd->auth_data->algorithm || 4089 (auth_alg != WLAN_AUTH_SAE && 4090 auth_transaction != ifmgd->auth_data->expected_transaction) || 4091 (auth_alg == WLAN_AUTH_SAE && 4092 (auth_transaction < ifmgd->auth_data->expected_transaction || 4093 auth_transaction > 2))) { 4094 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4095 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4096 auth_transaction, 4097 ifmgd->auth_data->expected_transaction); 4098 goto notify_driver; 4099 } 4100 4101 if (status_code != WLAN_STATUS_SUCCESS) { 4102 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4103 4104 if (auth_alg == WLAN_AUTH_SAE && 4105 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4106 (auth_transaction == 1 && 4107 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4108 status_code == WLAN_STATUS_SAE_PK)))) { 4109 /* waiting for userspace now */ 4110 ifmgd->auth_data->waiting = true; 4111 ifmgd->auth_data->timeout = 4112 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4113 ifmgd->auth_data->timeout_started = true; 4114 run_again(sdata, ifmgd->auth_data->timeout); 4115 goto notify_driver; 4116 } 4117 4118 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4119 mgmt->sa, status_code); 4120 ieee80211_destroy_auth_data(sdata, false); 4121 event.u.mlme.status = MLME_DENIED; 4122 event.u.mlme.reason = status_code; 4123 drv_event_callback(sdata->local, sdata, &event); 4124 goto notify_driver; 4125 } 4126 4127 switch (ifmgd->auth_data->algorithm) { 4128 case WLAN_AUTH_OPEN: 4129 case WLAN_AUTH_LEAP: 4130 case WLAN_AUTH_FT: 4131 case WLAN_AUTH_SAE: 4132 case WLAN_AUTH_FILS_SK: 4133 case WLAN_AUTH_FILS_SK_PFS: 4134 case WLAN_AUTH_FILS_PK: 4135 break; 4136 case WLAN_AUTH_SHARED_KEY: 4137 if (ifmgd->auth_data->expected_transaction != 4) { 4138 ieee80211_auth_challenge(sdata, mgmt, len); 4139 /* need another frame */ 4140 return; 4141 } 4142 break; 4143 default: 4144 WARN_ONCE(1, "invalid auth alg %d", 4145 ifmgd->auth_data->algorithm); 4146 goto notify_driver; 4147 } 4148 4149 event.u.mlme.status = MLME_SUCCESS; 4150 info.success = 1; 4151 drv_event_callback(sdata->local, sdata, &event); 4152 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4153 (auth_transaction == 2 && 4154 ifmgd->auth_data->expected_transaction == 2)) { 4155 if (!ieee80211_mark_sta_auth(sdata)) 4156 return; /* ignore frame -- wait for timeout */ 4157 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4158 auth_transaction == 2) { 4159 sdata_info(sdata, "SAE peer confirmed\n"); 4160 ifmgd->auth_data->peer_confirmed = true; 4161 } 4162 4163 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4164 notify_driver: 4165 drv_mgd_complete_tx(sdata->local, sdata, &info); 4166 } 4167 4168 #define case_WLAN(type) \ 4169 case WLAN_REASON_##type: return #type 4170 4171 const char *ieee80211_get_reason_code_string(u16 reason_code) 4172 { 4173 switch (reason_code) { 4174 case_WLAN(UNSPECIFIED); 4175 case_WLAN(PREV_AUTH_NOT_VALID); 4176 case_WLAN(DEAUTH_LEAVING); 4177 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4178 case_WLAN(DISASSOC_AP_BUSY); 4179 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4180 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4181 case_WLAN(DISASSOC_STA_HAS_LEFT); 4182 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4183 case_WLAN(DISASSOC_BAD_POWER); 4184 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4185 case_WLAN(INVALID_IE); 4186 case_WLAN(MIC_FAILURE); 4187 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4188 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4189 case_WLAN(IE_DIFFERENT); 4190 case_WLAN(INVALID_GROUP_CIPHER); 4191 case_WLAN(INVALID_PAIRWISE_CIPHER); 4192 case_WLAN(INVALID_AKMP); 4193 case_WLAN(UNSUPP_RSN_VERSION); 4194 case_WLAN(INVALID_RSN_IE_CAP); 4195 case_WLAN(IEEE8021X_FAILED); 4196 case_WLAN(CIPHER_SUITE_REJECTED); 4197 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4198 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4199 case_WLAN(DISASSOC_LOW_ACK); 4200 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4201 case_WLAN(QSTA_LEAVE_QBSS); 4202 case_WLAN(QSTA_NOT_USE); 4203 case_WLAN(QSTA_REQUIRE_SETUP); 4204 case_WLAN(QSTA_TIMEOUT); 4205 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4206 case_WLAN(MESH_PEER_CANCELED); 4207 case_WLAN(MESH_MAX_PEERS); 4208 case_WLAN(MESH_CONFIG); 4209 case_WLAN(MESH_CLOSE); 4210 case_WLAN(MESH_MAX_RETRIES); 4211 case_WLAN(MESH_CONFIRM_TIMEOUT); 4212 case_WLAN(MESH_INVALID_GTK); 4213 case_WLAN(MESH_INCONSISTENT_PARAM); 4214 case_WLAN(MESH_INVALID_SECURITY); 4215 case_WLAN(MESH_PATH_ERROR); 4216 case_WLAN(MESH_PATH_NOFORWARD); 4217 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4218 case_WLAN(MAC_EXISTS_IN_MBSS); 4219 case_WLAN(MESH_CHAN_REGULATORY); 4220 case_WLAN(MESH_CHAN); 4221 default: return "<unknown>"; 4222 } 4223 } 4224 4225 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4226 struct ieee80211_mgmt *mgmt, size_t len) 4227 { 4228 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4229 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4230 4231 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4232 4233 if (len < 24 + 2) 4234 return; 4235 4236 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4237 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4238 return; 4239 } 4240 4241 if (ifmgd->associated && 4242 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4243 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4244 sdata->vif.cfg.ap_addr, reason_code, 4245 ieee80211_get_reason_code_string(reason_code)); 4246 4247 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4248 4249 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4250 reason_code, false); 4251 return; 4252 } 4253 4254 if (ifmgd->assoc_data && 4255 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4256 sdata_info(sdata, 4257 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4258 ifmgd->assoc_data->ap_addr, reason_code, 4259 ieee80211_get_reason_code_string(reason_code)); 4260 4261 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4262 4263 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4264 return; 4265 } 4266 } 4267 4268 4269 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4270 struct ieee80211_mgmt *mgmt, size_t len) 4271 { 4272 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4273 u16 reason_code; 4274 4275 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4276 4277 if (len < 24 + 2) 4278 return; 4279 4280 if (!ifmgd->associated || 4281 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4282 return; 4283 4284 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4285 4286 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4287 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4288 return; 4289 } 4290 4291 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4292 sdata->vif.cfg.ap_addr, reason_code, 4293 ieee80211_get_reason_code_string(reason_code)); 4294 4295 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4296 4297 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4298 false); 4299 } 4300 4301 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4302 u8 *supp_rates, unsigned int supp_rates_len, 4303 u32 *rates, u32 *basic_rates, 4304 bool *have_higher_than_11mbit, 4305 int *min_rate, int *min_rate_index) 4306 { 4307 int i, j; 4308 4309 for (i = 0; i < supp_rates_len; i++) { 4310 int rate = supp_rates[i] & 0x7f; 4311 bool is_basic = !!(supp_rates[i] & 0x80); 4312 4313 if ((rate * 5) > 110) 4314 *have_higher_than_11mbit = true; 4315 4316 /* 4317 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4318 * selectors since they're not rates. 4319 * 4320 * Note: Even though the membership selector and the basic 4321 * rate flag share the same bit, they are not exactly 4322 * the same. 4323 */ 4324 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4325 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4326 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4327 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4328 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4329 continue; 4330 4331 for (j = 0; j < sband->n_bitrates; j++) { 4332 struct ieee80211_rate *br; 4333 int brate; 4334 4335 br = &sband->bitrates[j]; 4336 4337 brate = DIV_ROUND_UP(br->bitrate, 5); 4338 if (brate == rate) { 4339 *rates |= BIT(j); 4340 if (is_basic) 4341 *basic_rates |= BIT(j); 4342 if ((rate * 5) < *min_rate) { 4343 *min_rate = rate * 5; 4344 *min_rate_index = j; 4345 } 4346 break; 4347 } 4348 } 4349 } 4350 } 4351 4352 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4353 struct ieee80211_supported_band *sband, 4354 const struct link_sta_info *link_sta, 4355 const struct ieee802_11_elems *elems) 4356 { 4357 const struct ieee80211_sta_he_cap *own_he_cap = 4358 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4359 4360 if (elems->ext_capab_len < 10) 4361 return false; 4362 4363 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4364 return false; 4365 4366 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4367 IEEE80211_HE_MAC_CAP0_TWT_RES && 4368 own_he_cap && 4369 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4370 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4371 } 4372 4373 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4374 struct ieee80211_supported_band *sband, 4375 struct ieee80211_link_data *link, 4376 struct link_sta_info *link_sta, 4377 struct ieee802_11_elems *elems) 4378 { 4379 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4380 4381 if (link->conf->twt_requester != twt) { 4382 link->conf->twt_requester = twt; 4383 return BSS_CHANGED_TWT; 4384 } 4385 return 0; 4386 } 4387 4388 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4389 struct ieee80211_bss_conf *bss_conf, 4390 struct ieee80211_supported_band *sband, 4391 struct link_sta_info *link_sta) 4392 { 4393 const struct ieee80211_sta_he_cap *own_he_cap = 4394 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4395 4396 return bss_conf->he_support && 4397 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4398 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4399 own_he_cap && 4400 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4401 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4402 } 4403 4404 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4405 struct link_sta_info *link_sta, 4406 struct cfg80211_bss *cbss, 4407 struct ieee80211_mgmt *mgmt, 4408 const u8 *elem_start, 4409 unsigned int elem_len, 4410 u64 *changed) 4411 { 4412 struct ieee80211_sub_if_data *sdata = link->sdata; 4413 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4414 struct ieee80211_bss_conf *bss_conf = link->conf; 4415 struct ieee80211_local *local = sdata->local; 4416 unsigned int link_id = link->link_id; 4417 struct ieee80211_elems_parse_params parse_params = { 4418 .mode = link->u.mgd.conn.mode, 4419 .start = elem_start, 4420 .len = elem_len, 4421 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4422 .from_ap = true, 4423 }; 4424 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4425 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4426 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4427 const struct cfg80211_bss_ies *bss_ies = NULL; 4428 struct ieee80211_supported_band *sband; 4429 struct ieee802_11_elems *elems; 4430 const __le16 prof_bss_param_ch_present = 4431 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4432 u16 capab_info; 4433 bool ret; 4434 4435 elems = ieee802_11_parse_elems_full(&parse_params); 4436 if (!elems) 4437 return false; 4438 4439 if (link_id == assoc_data->assoc_link_id) { 4440 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4441 4442 /* 4443 * we should not get to this flow unless the association was 4444 * successful, so set the status directly to success 4445 */ 4446 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4447 if (elems->ml_basic) { 4448 int bss_param_ch_cnt = 4449 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4450 4451 if (bss_param_ch_cnt < 0) { 4452 ret = false; 4453 goto out; 4454 } 4455 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; 4456 } 4457 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4458 !elems->prof || 4459 !(elems->prof->control & prof_bss_param_ch_present)) { 4460 ret = false; 4461 goto out; 4462 } else { 4463 const u8 *ptr = elems->prof->variable + 4464 elems->prof->sta_info_len - 1; 4465 4466 /* 4467 * During parsing, we validated that these fields exist, 4468 * otherwise elems->prof would have been set to NULL. 4469 */ 4470 capab_info = get_unaligned_le16(ptr); 4471 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4472 link->u.mgd.bss_param_ch_cnt = 4473 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4474 4475 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4476 link_info(link, "association response status code=%u\n", 4477 assoc_data->link[link_id].status); 4478 ret = true; 4479 goto out; 4480 } 4481 } 4482 4483 if (!is_s1g && !elems->supp_rates) { 4484 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4485 ret = false; 4486 goto out; 4487 } 4488 4489 link->u.mgd.tdls_chan_switch_prohibited = 4490 elems->ext_capab && elems->ext_capab_len >= 5 && 4491 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4492 4493 /* 4494 * Some APs are erroneously not including some information in their 4495 * (re)association response frames. Try to recover by using the data 4496 * from the beacon or probe response. This seems to afflict mobile 4497 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4498 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4499 */ 4500 if (!is_6ghz && 4501 ((assoc_data->wmm && !elems->wmm_param) || 4502 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4503 (!elems->ht_cap_elem || !elems->ht_operation)) || 4504 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4505 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4506 const struct cfg80211_bss_ies *ies; 4507 struct ieee802_11_elems *bss_elems; 4508 4509 rcu_read_lock(); 4510 ies = rcu_dereference(cbss->ies); 4511 if (ies) 4512 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4513 GFP_ATOMIC); 4514 rcu_read_unlock(); 4515 if (!bss_ies) { 4516 ret = false; 4517 goto out; 4518 } 4519 4520 parse_params.start = bss_ies->data; 4521 parse_params.len = bss_ies->len; 4522 parse_params.bss = cbss; 4523 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4524 if (!bss_elems) { 4525 ret = false; 4526 goto out; 4527 } 4528 4529 if (assoc_data->wmm && 4530 !elems->wmm_param && bss_elems->wmm_param) { 4531 elems->wmm_param = bss_elems->wmm_param; 4532 sdata_info(sdata, 4533 "AP bug: WMM param missing from AssocResp\n"); 4534 } 4535 4536 /* 4537 * Also check if we requested HT/VHT, otherwise the AP doesn't 4538 * have to include the IEs in the (re)association response. 4539 */ 4540 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4541 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4542 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4543 sdata_info(sdata, 4544 "AP bug: HT capability missing from AssocResp\n"); 4545 } 4546 if (!elems->ht_operation && bss_elems->ht_operation && 4547 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4548 elems->ht_operation = bss_elems->ht_operation; 4549 sdata_info(sdata, 4550 "AP bug: HT operation missing from AssocResp\n"); 4551 } 4552 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4553 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4554 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4555 sdata_info(sdata, 4556 "AP bug: VHT capa missing from AssocResp\n"); 4557 } 4558 if (!elems->vht_operation && bss_elems->vht_operation && 4559 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4560 elems->vht_operation = bss_elems->vht_operation; 4561 sdata_info(sdata, 4562 "AP bug: VHT operation missing from AssocResp\n"); 4563 } 4564 4565 kfree(bss_elems); 4566 } 4567 4568 /* 4569 * We previously checked these in the beacon/probe response, so 4570 * they should be present here. This is just a safety net. 4571 * Note that the ieee80211_config_bw() below would also check 4572 * for this (and more), but this has better error reporting. 4573 */ 4574 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4575 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4576 sdata_info(sdata, 4577 "HT AP is missing WMM params or HT capability/operation\n"); 4578 ret = false; 4579 goto out; 4580 } 4581 4582 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4583 (!elems->vht_cap_elem || !elems->vht_operation)) { 4584 sdata_info(sdata, 4585 "VHT AP is missing VHT capability/operation\n"); 4586 ret = false; 4587 goto out; 4588 } 4589 4590 /* check/update if AP changed anything in assoc response vs. scan */ 4591 if (ieee80211_config_bw(link, elems, 4592 link_id == assoc_data->assoc_link_id, 4593 changed)) { 4594 ret = false; 4595 goto out; 4596 } 4597 4598 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4599 ret = false; 4600 goto out; 4601 } 4602 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4603 4604 /* Set up internal HT/VHT capabilities */ 4605 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4606 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4607 elems->ht_cap_elem, 4608 link_sta); 4609 4610 if (elems->vht_cap_elem && 4611 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4612 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4613 const struct cfg80211_bss_ies *ies; 4614 4615 /* 4616 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4617 * too large maximum MPDU length in the association response 4618 * (indicating 12k) that it cannot actually process ... 4619 * Work around that. 4620 */ 4621 rcu_read_lock(); 4622 ies = rcu_dereference(cbss->ies); 4623 if (ies) { 4624 const struct element *elem; 4625 4626 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4627 ies->data, ies->len); 4628 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4629 bss_vht_cap = (const void *)elem->data; 4630 } 4631 4632 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4633 elems->vht_cap_elem, 4634 bss_vht_cap, link_sta); 4635 rcu_read_unlock(); 4636 } 4637 4638 if (elems->he_operation && 4639 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4640 elems->he_cap) { 4641 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4642 elems->he_cap, 4643 elems->he_cap_len, 4644 elems->he_6ghz_capa, 4645 link_sta); 4646 4647 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4648 if (elems->rsnx && elems->rsnx_len && 4649 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4650 wiphy_ext_feature_isset(local->hw.wiphy, 4651 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4652 bss_conf->twt_protected = true; 4653 else 4654 bss_conf->twt_protected = false; 4655 4656 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4657 link_sta, elems); 4658 4659 if (elems->eht_operation && elems->eht_cap && 4660 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4661 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4662 elems->he_cap, 4663 elems->he_cap_len, 4664 elems->eht_cap, 4665 elems->eht_cap_len, 4666 link_sta); 4667 4668 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4669 } else { 4670 bss_conf->eht_support = false; 4671 } 4672 } else { 4673 bss_conf->he_support = false; 4674 bss_conf->twt_requester = false; 4675 bss_conf->twt_protected = false; 4676 bss_conf->eht_support = false; 4677 } 4678 4679 bss_conf->twt_broadcast = 4680 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4681 4682 if (bss_conf->he_support) { 4683 bss_conf->he_bss_color.color = 4684 le32_get_bits(elems->he_operation->he_oper_params, 4685 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4686 bss_conf->he_bss_color.partial = 4687 le32_get_bits(elems->he_operation->he_oper_params, 4688 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4689 bss_conf->he_bss_color.enabled = 4690 !le32_get_bits(elems->he_operation->he_oper_params, 4691 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4692 4693 if (bss_conf->he_bss_color.enabled) 4694 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4695 4696 bss_conf->htc_trig_based_pkt_ext = 4697 le32_get_bits(elems->he_operation->he_oper_params, 4698 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4699 bss_conf->frame_time_rts_th = 4700 le32_get_bits(elems->he_operation->he_oper_params, 4701 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4702 4703 bss_conf->uora_exists = !!elems->uora_element; 4704 if (elems->uora_element) 4705 bss_conf->uora_ocw_range = elems->uora_element[0]; 4706 4707 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4708 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4709 /* TODO: OPEN: what happens if BSS color disable is set? */ 4710 } 4711 4712 if (cbss->transmitted_bss) { 4713 bss_conf->nontransmitted = true; 4714 ether_addr_copy(bss_conf->transmitter_bssid, 4715 cbss->transmitted_bss->bssid); 4716 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4717 bss_conf->bssid_index = cbss->bssid_index; 4718 } 4719 4720 /* 4721 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4722 * in their association response, so ignore that data for our own 4723 * configuration. If it changed since the last beacon, we'll get the 4724 * next beacon and update then. 4725 */ 4726 4727 /* 4728 * If an operating mode notification IE is present, override the 4729 * NSS calculation (that would be done in rate_control_rate_init()) 4730 * and use the # of streams from that element. 4731 */ 4732 if (elems->opmode_notif && 4733 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4734 u8 nss; 4735 4736 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4737 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4738 nss += 1; 4739 link_sta->pub->rx_nss = nss; 4740 } 4741 4742 /* 4743 * Always handle WMM once after association regardless 4744 * of the first value the AP uses. Setting -1 here has 4745 * that effect because the AP values is an unsigned 4746 * 4-bit value. 4747 */ 4748 link->u.mgd.wmm_last_param_set = -1; 4749 link->u.mgd.mu_edca_last_param_set = -1; 4750 4751 if (link->u.mgd.disable_wmm_tracking) { 4752 ieee80211_set_wmm_default(link, false, false); 4753 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4754 elems->wmm_param_len, 4755 elems->mu_edca_param_set)) { 4756 /* still enable QoS since we might have HT/VHT */ 4757 ieee80211_set_wmm_default(link, false, true); 4758 /* disable WMM tracking in this case to disable 4759 * tracking WMM parameter changes in the beacon if 4760 * the parameters weren't actually valid. Doing so 4761 * avoids changing parameters very strangely when 4762 * the AP is going back and forth between valid and 4763 * invalid parameters. 4764 */ 4765 link->u.mgd.disable_wmm_tracking = true; 4766 } 4767 4768 if (elems->max_idle_period_ie) { 4769 bss_conf->max_idle_period = 4770 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4771 bss_conf->protected_keep_alive = 4772 !!(elems->max_idle_period_ie->idle_options & 4773 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4774 *changed |= BSS_CHANGED_KEEP_ALIVE; 4775 } else { 4776 bss_conf->max_idle_period = 0; 4777 bss_conf->protected_keep_alive = false; 4778 } 4779 4780 /* set assoc capability (AID was already set earlier), 4781 * ieee80211_set_associated() will tell the driver */ 4782 bss_conf->assoc_capability = capab_info; 4783 4784 ret = true; 4785 out: 4786 kfree(elems); 4787 kfree(bss_ies); 4788 return ret; 4789 } 4790 4791 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4792 struct sta_info *sta, 4793 struct link_sta_info *link_sta, 4794 struct cfg80211_bss *cbss) 4795 { 4796 struct ieee80211_sub_if_data *sdata = link->sdata; 4797 struct ieee80211_local *local = sdata->local; 4798 struct ieee80211_bss *bss = (void *)cbss->priv; 4799 u32 rates = 0, basic_rates = 0; 4800 bool have_higher_than_11mbit = false; 4801 int min_rate = INT_MAX, min_rate_index = -1; 4802 struct ieee80211_supported_band *sband; 4803 4804 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4805 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4806 4807 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4808 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4809 ieee80211_s1g_sta_rate_init(sta); 4810 return 0; 4811 } 4812 4813 sband = local->hw.wiphy->bands[cbss->channel->band]; 4814 4815 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4816 &rates, &basic_rates, &have_higher_than_11mbit, 4817 &min_rate, &min_rate_index); 4818 4819 /* 4820 * This used to be a workaround for basic rates missing 4821 * in the association response frame. Now that we no 4822 * longer use the basic rates from there, it probably 4823 * doesn't happen any more, but keep the workaround so 4824 * in case some *other* APs are buggy in different ways 4825 * we can connect -- with a warning. 4826 * Allow this workaround only in case the AP provided at least 4827 * one rate. 4828 */ 4829 if (min_rate_index < 0) { 4830 link_info(link, "No legacy rates in association response\n"); 4831 return -EINVAL; 4832 } else if (!basic_rates) { 4833 link_info(link, "No basic rates, using min rate instead\n"); 4834 basic_rates = BIT(min_rate_index); 4835 } 4836 4837 if (rates) 4838 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4839 else 4840 link_info(link, "No rates found, keeping mandatory only\n"); 4841 4842 link->conf->basic_rates = basic_rates; 4843 4844 /* cf. IEEE 802.11 9.2.12 */ 4845 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4846 have_higher_than_11mbit; 4847 4848 return 0; 4849 } 4850 4851 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4852 struct cfg80211_bss *cbss) 4853 { 4854 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4855 const struct element *ht_cap_elem, *vht_cap_elem; 4856 const struct cfg80211_bss_ies *ies; 4857 const struct ieee80211_ht_cap *ht_cap; 4858 const struct ieee80211_vht_cap *vht_cap; 4859 const struct ieee80211_he_cap_elem *he_cap; 4860 const struct element *he_cap_elem; 4861 u16 mcs_80_map, mcs_160_map; 4862 int i, mcs_nss_size; 4863 bool support_160; 4864 u8 chains = 1; 4865 4866 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 4867 return chains; 4868 4869 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4870 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4871 ht_cap = (void *)ht_cap_elem->data; 4872 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4873 /* 4874 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4875 * "Tx Unequal Modulation Supported" fields. 4876 */ 4877 } 4878 4879 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 4880 return chains; 4881 4882 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4883 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4884 u8 nss; 4885 u16 tx_mcs_map; 4886 4887 vht_cap = (void *)vht_cap_elem->data; 4888 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4889 for (nss = 8; nss > 0; nss--) { 4890 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4891 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4892 break; 4893 } 4894 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4895 chains = max(chains, nss); 4896 } 4897 4898 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 4899 return chains; 4900 4901 ies = rcu_dereference(cbss->ies); 4902 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4903 ies->data, ies->len); 4904 4905 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4906 return chains; 4907 4908 /* skip one byte ext_tag_id */ 4909 he_cap = (void *)(he_cap_elem->data + 1); 4910 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4911 4912 /* invalid HE IE */ 4913 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4914 return chains; 4915 4916 /* mcs_nss is right after he_cap info */ 4917 he_mcs_nss_supp = (void *)(he_cap + 1); 4918 4919 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4920 4921 for (i = 7; i >= 0; i--) { 4922 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4923 4924 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4925 chains = max_t(u8, chains, i + 1); 4926 break; 4927 } 4928 } 4929 4930 support_160 = he_cap->phy_cap_info[0] & 4931 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4932 4933 if (!support_160) 4934 return chains; 4935 4936 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4937 for (i = 7; i >= 0; i--) { 4938 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4939 4940 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4941 chains = max_t(u8, chains, i + 1); 4942 break; 4943 } 4944 } 4945 4946 return chains; 4947 } 4948 4949 static void 4950 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 4951 struct ieee80211_supported_band *sband, 4952 struct cfg80211_assoc_request *req, 4953 bool wmm_used, int link_id, 4954 struct ieee80211_conn_settings *conn) 4955 { 4956 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 4957 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 4958 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 4959 const struct ieee80211_sta_he_cap *he_cap; 4960 const struct ieee80211_sta_eht_cap *eht_cap; 4961 struct ieee80211_sta_vht_cap vht_cap; 4962 4963 if (sband->band == NL80211_BAND_S1GHZ) { 4964 conn->mode = IEEE80211_CONN_MODE_S1G; 4965 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4966 mlme_dbg(sdata, "operating as S1G STA\n"); 4967 return; 4968 } 4969 4970 conn->mode = IEEE80211_CONN_MODE_LEGACY; 4971 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4972 4973 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4974 4975 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 4976 mlme_link_id_dbg(sdata, link_id, 4977 "HT disabled by flag, limiting to legacy\n"); 4978 goto out; 4979 } 4980 4981 if (!wmm_used) { 4982 mlme_link_id_dbg(sdata, link_id, 4983 "WMM/QoS not supported, limiting to legacy\n"); 4984 goto out; 4985 } 4986 4987 if (req) { 4988 unsigned int i; 4989 4990 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4991 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4992 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4993 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4994 netdev_info(sdata->dev, 4995 "WEP/TKIP use, limiting to legacy\n"); 4996 goto out; 4997 } 4998 } 4999 } 5000 5001 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5002 mlme_link_id_dbg(sdata, link_id, 5003 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5004 goto out; 5005 } 5006 5007 /* HT is fine */ 5008 conn->mode = IEEE80211_CONN_MODE_HT; 5009 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5010 IEEE80211_CONN_BW_LIMIT_40 : 5011 IEEE80211_CONN_BW_LIMIT_20; 5012 5013 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5014 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5015 5016 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5017 mlme_link_id_dbg(sdata, link_id, 5018 "VHT disabled by flag, limiting to HT\n"); 5019 goto out; 5020 } 5021 5022 if (vht_cap.vht_supported && is_5ghz) { 5023 bool have_80mhz = false; 5024 unsigned int i; 5025 5026 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5027 mlme_link_id_dbg(sdata, link_id, 5028 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5029 goto out; 5030 } 5031 5032 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5033 for (i = 0; i < sband->n_channels; i++) { 5034 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5035 IEEE80211_CHAN_NO_80MHZ)) 5036 continue; 5037 5038 have_80mhz = true; 5039 break; 5040 } 5041 5042 if (!have_80mhz) { 5043 mlme_link_id_dbg(sdata, link_id, 5044 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5045 goto out; 5046 } 5047 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5048 mlme_link_id_dbg(sdata, link_id, 5049 "no VHT support on 5 GHz, limiting to HT\n"); 5050 goto out; 5051 } 5052 5053 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5054 if (sband->band != NL80211_BAND_2GHZ) { 5055 conn->mode = IEEE80211_CONN_MODE_VHT; 5056 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5057 } 5058 5059 if (is_5ghz && 5060 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5061 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5062 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5063 mlme_link_id_dbg(sdata, link_id, 5064 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5065 } 5066 5067 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5068 mlme_link_id_dbg(sdata, link_id, 5069 "HE disabled by flag, limiting to HT/VHT\n"); 5070 goto out; 5071 } 5072 5073 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5074 if (!he_cap) { 5075 WARN_ON(is_6ghz); 5076 mlme_link_id_dbg(sdata, link_id, 5077 "no HE support, limiting to HT/VHT\n"); 5078 goto out; 5079 } 5080 5081 /* so we have HE */ 5082 conn->mode = IEEE80211_CONN_MODE_HE; 5083 5084 /* check bandwidth */ 5085 switch (sband->band) { 5086 default: 5087 case NL80211_BAND_2GHZ: 5088 if (he_cap->he_cap_elem.phy_cap_info[0] & 5089 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5090 break; 5091 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5092 mlme_link_id_dbg(sdata, link_id, 5093 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5094 break; 5095 case NL80211_BAND_5GHZ: 5096 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5097 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5098 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5099 mlme_link_id_dbg(sdata, link_id, 5100 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5101 break; 5102 } 5103 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5104 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5105 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5106 conn->bw_limit, 5107 IEEE80211_CONN_BW_LIMIT_80); 5108 mlme_link_id_dbg(sdata, link_id, 5109 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5110 } 5111 break; 5112 case NL80211_BAND_6GHZ: 5113 if (he_cap->he_cap_elem.phy_cap_info[0] & 5114 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5115 break; 5116 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5117 conn->bw_limit, 5118 IEEE80211_CONN_BW_LIMIT_80); 5119 mlme_link_id_dbg(sdata, link_id, 5120 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5121 break; 5122 } 5123 5124 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5125 mlme_link_id_dbg(sdata, link_id, 5126 "EHT disabled by flag, limiting to HE\n"); 5127 goto out; 5128 } 5129 5130 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5131 if (!eht_cap) { 5132 mlme_link_id_dbg(sdata, link_id, 5133 "no EHT support, limiting to HE\n"); 5134 goto out; 5135 } 5136 5137 /* we have EHT */ 5138 5139 conn->mode = IEEE80211_CONN_MODE_EHT; 5140 5141 /* check bandwidth */ 5142 if (is_6ghz && 5143 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5144 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5145 else if (is_6ghz) 5146 mlme_link_id_dbg(sdata, link_id, 5147 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5148 5149 out: 5150 mlme_link_id_dbg(sdata, link_id, 5151 "determined local STA to be %s, BW limited to %d MHz\n", 5152 ieee80211_conn_mode_str(conn->mode), 5153 20 * (1 << conn->bw_limit)); 5154 } 5155 5156 static void 5157 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5158 struct ieee80211_supported_band *sband, 5159 struct cfg80211_auth_request *req, 5160 bool wmm_used, 5161 struct ieee80211_conn_settings *conn) 5162 { 5163 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5164 req->link_id > 0 ? req->link_id : 0, 5165 conn); 5166 } 5167 5168 static void 5169 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5170 struct ieee80211_supported_band *sband, 5171 struct cfg80211_assoc_request *req, 5172 bool wmm_used, int link_id, 5173 struct ieee80211_conn_settings *conn) 5174 { 5175 struct ieee80211_conn_settings tmp; 5176 5177 WARN_ON(!req); 5178 5179 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5180 &tmp); 5181 5182 conn->mode = min_t(enum ieee80211_conn_mode, 5183 conn->mode, tmp.mode); 5184 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5185 conn->bw_limit, tmp.bw_limit); 5186 } 5187 5188 static enum ieee80211_ap_reg_power 5189 ieee80211_ap_power_type(u8 control) 5190 { 5191 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5192 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5193 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5194 return IEEE80211_REG_LPI_AP; 5195 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5196 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5197 return IEEE80211_REG_SP_AP; 5198 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5199 return IEEE80211_REG_VLP_AP; 5200 default: 5201 return IEEE80211_REG_UNSET_AP; 5202 } 5203 } 5204 5205 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5206 struct ieee80211_link_data *link, 5207 int link_id, 5208 struct cfg80211_bss *cbss, bool mlo, 5209 struct ieee80211_conn_settings *conn) 5210 { 5211 struct ieee80211_local *local = sdata->local; 5212 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5213 struct ieee80211_chan_req chanreq = {}; 5214 struct cfg80211_chan_def ap_chandef; 5215 struct ieee802_11_elems *elems; 5216 int ret; 5217 5218 lockdep_assert_wiphy(local->hw.wiphy); 5219 5220 rcu_read_lock(); 5221 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5222 &chanreq, &ap_chandef); 5223 5224 if (IS_ERR(elems)) { 5225 rcu_read_unlock(); 5226 return PTR_ERR(elems); 5227 } 5228 5229 if (mlo && !elems->ml_basic) { 5230 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5231 rcu_read_unlock(); 5232 kfree(elems); 5233 return -EINVAL; 5234 } 5235 5236 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5237 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5238 5239 if (elems->pwr_constr_elem) 5240 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5241 5242 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5243 if (he_6ghz_oper) 5244 link->conf->power_type = 5245 ieee80211_ap_power_type(he_6ghz_oper->control); 5246 else 5247 link_info(link, 5248 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5249 cbss->channel->center_freq); 5250 5251 link->conf->tpe = elems->tpe; 5252 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5253 &chanreq.oper); 5254 } 5255 rcu_read_unlock(); 5256 /* the element data was RCU protected so no longer valid anyway */ 5257 kfree(elems); 5258 elems = NULL; 5259 5260 if (!link) 5261 return 0; 5262 5263 rcu_read_lock(); 5264 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5265 local->rx_chains); 5266 rcu_read_unlock(); 5267 5268 /* 5269 * If this fails (possibly due to channel context sharing 5270 * on incompatible channels, e.g. 80+80 and 160 sharing the 5271 * same control channel) try to use a smaller bandwidth. 5272 */ 5273 ret = ieee80211_link_use_channel(link, &chanreq, 5274 IEEE80211_CHANCTX_SHARED); 5275 5276 /* don't downgrade for 5 and 10 MHz channels, though. */ 5277 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5278 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5279 return ret; 5280 5281 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5282 ieee80211_chanreq_downgrade(&chanreq, conn); 5283 5284 ret = ieee80211_link_use_channel(link, &chanreq, 5285 IEEE80211_CHANCTX_SHARED); 5286 } 5287 5288 return ret; 5289 } 5290 5291 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5292 u8 *dtim_count, u8 *dtim_period) 5293 { 5294 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5295 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5296 ies->len); 5297 const struct ieee80211_tim_ie *tim = NULL; 5298 const struct ieee80211_bssid_index *idx; 5299 bool valid = tim_ie && tim_ie[1] >= 2; 5300 5301 if (valid) 5302 tim = (void *)(tim_ie + 2); 5303 5304 if (dtim_count) 5305 *dtim_count = valid ? tim->dtim_count : 0; 5306 5307 if (dtim_period) 5308 *dtim_period = valid ? tim->dtim_period : 0; 5309 5310 /* Check if value is overridden by non-transmitted profile */ 5311 if (!idx_ie || idx_ie[1] < 3) 5312 return valid; 5313 5314 idx = (void *)(idx_ie + 2); 5315 5316 if (dtim_count) 5317 *dtim_count = idx->dtim_count; 5318 5319 if (dtim_period) 5320 *dtim_period = idx->dtim_period; 5321 5322 return true; 5323 } 5324 5325 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5326 struct ieee80211_mgmt *mgmt, 5327 struct ieee802_11_elems *elems, 5328 const u8 *elem_start, unsigned int elem_len) 5329 { 5330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5331 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5332 struct ieee80211_local *local = sdata->local; 5333 unsigned int link_id; 5334 struct sta_info *sta; 5335 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5336 u16 valid_links = 0, dormant_links = 0; 5337 int err; 5338 5339 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5340 /* 5341 * station info was already allocated and inserted before 5342 * the association and should be available to us 5343 */ 5344 sta = sta_info_get(sdata, assoc_data->ap_addr); 5345 if (WARN_ON(!sta)) 5346 goto out_err; 5347 5348 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5349 5350 if (ieee80211_vif_is_mld(&sdata->vif)) { 5351 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5352 if (!assoc_data->link[link_id].bss) 5353 continue; 5354 5355 valid_links |= BIT(link_id); 5356 if (assoc_data->link[link_id].disabled) 5357 dormant_links |= BIT(link_id); 5358 5359 if (link_id != assoc_data->assoc_link_id) { 5360 err = ieee80211_sta_allocate_link(sta, link_id); 5361 if (err) 5362 goto out_err; 5363 } 5364 } 5365 5366 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5367 } 5368 5369 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5370 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5371 struct ieee80211_link_data *link; 5372 struct link_sta_info *link_sta; 5373 5374 if (!cbss) 5375 continue; 5376 5377 link = sdata_dereference(sdata->link[link_id], sdata); 5378 if (WARN_ON(!link)) 5379 goto out_err; 5380 5381 if (ieee80211_vif_is_mld(&sdata->vif)) 5382 link_info(link, 5383 "local address %pM, AP link address %pM%s\n", 5384 link->conf->addr, 5385 assoc_data->link[link_id].bss->bssid, 5386 link_id == assoc_data->assoc_link_id ? 5387 " (assoc)" : ""); 5388 5389 link_sta = rcu_dereference_protected(sta->link[link_id], 5390 lockdep_is_held(&local->hw.wiphy->mtx)); 5391 if (WARN_ON(!link_sta)) 5392 goto out_err; 5393 5394 if (!link->u.mgd.have_beacon) { 5395 const struct cfg80211_bss_ies *ies; 5396 5397 rcu_read_lock(); 5398 ies = rcu_dereference(cbss->beacon_ies); 5399 if (ies) 5400 link->u.mgd.have_beacon = true; 5401 else 5402 ies = rcu_dereference(cbss->ies); 5403 ieee80211_get_dtim(ies, 5404 &link->conf->sync_dtim_count, 5405 &link->u.mgd.dtim_period); 5406 link->conf->beacon_int = cbss->beacon_interval; 5407 rcu_read_unlock(); 5408 } 5409 5410 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5411 5412 if (link_id != assoc_data->assoc_link_id) { 5413 link->u.mgd.conn = assoc_data->link[link_id].conn; 5414 5415 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5416 true, &link->u.mgd.conn); 5417 if (err) { 5418 link_info(link, "prep_channel failed\n"); 5419 goto out_err; 5420 } 5421 } 5422 5423 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5424 assoc_data->link[link_id].bss); 5425 if (err) 5426 goto out_err; 5427 5428 if (!ieee80211_assoc_config_link(link, link_sta, 5429 assoc_data->link[link_id].bss, 5430 mgmt, elem_start, elem_len, 5431 &changed[link_id])) 5432 goto out_err; 5433 5434 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5435 valid_links &= ~BIT(link_id); 5436 ieee80211_sta_remove_link(sta, link_id); 5437 continue; 5438 } 5439 5440 if (link_id != assoc_data->assoc_link_id) { 5441 err = ieee80211_sta_activate_link(sta, link_id); 5442 if (err) 5443 goto out_err; 5444 } 5445 } 5446 5447 /* links might have changed due to rejected ones, set them again */ 5448 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5449 5450 rate_control_rate_init(sta); 5451 5452 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5453 set_sta_flag(sta, WLAN_STA_MFP); 5454 sta->sta.mfp = true; 5455 } else { 5456 sta->sta.mfp = false; 5457 } 5458 5459 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5460 elems->ext_capab_len); 5461 5462 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5463 local->hw.queues >= IEEE80211_NUM_ACS; 5464 5465 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5466 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5467 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5468 if (err) { 5469 sdata_info(sdata, 5470 "failed to move station %pM to desired state\n", 5471 sta->sta.addr); 5472 WARN_ON(__sta_info_destroy(sta)); 5473 goto out_err; 5474 } 5475 5476 if (sdata->wdev.use_4addr) 5477 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5478 5479 ieee80211_set_associated(sdata, assoc_data, changed); 5480 5481 /* 5482 * If we're using 4-addr mode, let the AP know that we're 5483 * doing so, so that it can create the STA VLAN on its side 5484 */ 5485 if (ifmgd->use_4addr) 5486 ieee80211_send_4addr_nullfunc(local, sdata); 5487 5488 /* 5489 * Start timer to probe the connection to the AP now. 5490 * Also start the timer that will detect beacon loss. 5491 */ 5492 ieee80211_sta_reset_beacon_monitor(sdata); 5493 ieee80211_sta_reset_conn_monitor(sdata); 5494 5495 return true; 5496 out_err: 5497 eth_zero_addr(sdata->vif.cfg.ap_addr); 5498 return false; 5499 } 5500 5501 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5502 struct ieee80211_mgmt *mgmt, 5503 size_t len) 5504 { 5505 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5506 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5507 u16 capab_info, status_code, aid; 5508 struct ieee80211_elems_parse_params parse_params = { 5509 .bss = NULL, 5510 .link_id = -1, 5511 .from_ap = true, 5512 }; 5513 struct ieee802_11_elems *elems; 5514 int ac; 5515 const u8 *elem_start; 5516 unsigned int elem_len; 5517 bool reassoc; 5518 struct ieee80211_event event = { 5519 .type = MLME_EVENT, 5520 .u.mlme.data = ASSOC_EVENT, 5521 }; 5522 struct ieee80211_prep_tx_info info = {}; 5523 struct cfg80211_rx_assoc_resp_data resp = { 5524 .uapsd_queues = -1, 5525 }; 5526 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5527 unsigned int link_id; 5528 5529 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5530 5531 if (!assoc_data) 5532 return; 5533 5534 parse_params.mode = 5535 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5536 5537 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5538 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5539 return; 5540 5541 /* 5542 * AssocResp and ReassocResp have identical structure, so process both 5543 * of them in this function. 5544 */ 5545 5546 if (len < 24 + 6) 5547 return; 5548 5549 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5550 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5551 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5552 if (assoc_data->s1g) 5553 elem_start = mgmt->u.s1g_assoc_resp.variable; 5554 else 5555 elem_start = mgmt->u.assoc_resp.variable; 5556 5557 /* 5558 * Note: this may not be perfect, AP might misbehave - if 5559 * anyone needs to rely on perfect complete notification 5560 * with the exact right subtype, then we need to track what 5561 * we actually transmitted. 5562 */ 5563 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5564 IEEE80211_STYPE_ASSOC_REQ; 5565 5566 if (assoc_data->fils_kek_len && 5567 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5568 return; 5569 5570 elem_len = len - (elem_start - (u8 *)mgmt); 5571 parse_params.start = elem_start; 5572 parse_params.len = elem_len; 5573 elems = ieee802_11_parse_elems_full(&parse_params); 5574 if (!elems) 5575 goto notify_driver; 5576 5577 if (elems->aid_resp) 5578 aid = le16_to_cpu(elems->aid_resp->aid); 5579 else if (assoc_data->s1g) 5580 aid = 0; /* TODO */ 5581 else 5582 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5583 5584 /* 5585 * The 5 MSB of the AID field are reserved 5586 * (802.11-2016 9.4.1.8 AID field) 5587 */ 5588 aid &= 0x7ff; 5589 5590 sdata_info(sdata, 5591 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5592 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5593 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5594 5595 ifmgd->broken_ap = false; 5596 5597 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5598 elems->timeout_int && 5599 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5600 u32 tu, ms; 5601 5602 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5603 le32_to_cpu(elems->timeout_int->value)); 5604 5605 tu = le32_to_cpu(elems->timeout_int->value); 5606 ms = tu * 1024 / 1000; 5607 sdata_info(sdata, 5608 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5609 assoc_data->ap_addr, tu, ms); 5610 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5611 assoc_data->timeout_started = true; 5612 assoc_data->comeback = true; 5613 if (ms > IEEE80211_ASSOC_TIMEOUT) 5614 run_again(sdata, assoc_data->timeout); 5615 goto notify_driver; 5616 } 5617 5618 if (status_code != WLAN_STATUS_SUCCESS) { 5619 sdata_info(sdata, "%pM denied association (code=%d)\n", 5620 assoc_data->ap_addr, status_code); 5621 event.u.mlme.status = MLME_DENIED; 5622 event.u.mlme.reason = status_code; 5623 drv_event_callback(sdata->local, sdata, &event); 5624 } else { 5625 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5626 sdata_info(sdata, 5627 "invalid AID value %d (out of range), turn off PS\n", 5628 aid); 5629 aid = 0; 5630 ifmgd->broken_ap = true; 5631 } 5632 5633 if (ieee80211_vif_is_mld(&sdata->vif)) { 5634 struct ieee80211_mle_basic_common_info *common; 5635 5636 if (!elems->ml_basic) { 5637 sdata_info(sdata, 5638 "MLO association with %pM but no (basic) multi-link element in response!\n", 5639 assoc_data->ap_addr); 5640 goto abandon_assoc; 5641 } 5642 5643 common = (void *)elems->ml_basic->variable; 5644 5645 if (memcmp(assoc_data->ap_addr, 5646 common->mld_mac_addr, ETH_ALEN)) { 5647 sdata_info(sdata, 5648 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5649 common->mld_mac_addr, 5650 assoc_data->ap_addr); 5651 goto abandon_assoc; 5652 } 5653 5654 sdata->vif.cfg.eml_cap = 5655 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5656 sdata->vif.cfg.eml_med_sync_delay = 5657 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5658 sdata->vif.cfg.mld_capa_op = 5659 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5660 } 5661 5662 sdata->vif.cfg.aid = aid; 5663 5664 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5665 elem_start, elem_len)) { 5666 /* oops -- internal error -- send timeout for now */ 5667 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5668 goto notify_driver; 5669 } 5670 event.u.mlme.status = MLME_SUCCESS; 5671 drv_event_callback(sdata->local, sdata, &event); 5672 sdata_info(sdata, "associated\n"); 5673 5674 info.success = 1; 5675 } 5676 5677 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5678 struct ieee80211_link_data *link; 5679 5680 if (!assoc_data->link[link_id].bss) 5681 continue; 5682 5683 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5684 ether_addr_copy(resp.links[link_id].addr, 5685 assoc_data->link[link_id].addr); 5686 resp.links[link_id].status = assoc_data->link[link_id].status; 5687 5688 link = sdata_dereference(sdata->link[link_id], sdata); 5689 if (!link) 5690 continue; 5691 5692 /* get uapsd queues configuration - same for all links */ 5693 resp.uapsd_queues = 0; 5694 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5695 if (link->tx_conf[ac].uapsd) 5696 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5697 } 5698 5699 if (ieee80211_vif_is_mld(&sdata->vif)) { 5700 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5701 resp.ap_mld_addr = ap_mld_addr; 5702 } 5703 5704 ieee80211_destroy_assoc_data(sdata, 5705 status_code == WLAN_STATUS_SUCCESS ? 5706 ASSOC_SUCCESS : 5707 ASSOC_REJECTED); 5708 5709 resp.buf = (u8 *)mgmt; 5710 resp.len = len; 5711 resp.req_ies = ifmgd->assoc_req_ies; 5712 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5713 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5714 notify_driver: 5715 drv_mgd_complete_tx(sdata->local, sdata, &info); 5716 kfree(elems); 5717 return; 5718 abandon_assoc: 5719 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5720 goto notify_driver; 5721 } 5722 5723 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5724 struct ieee80211_mgmt *mgmt, size_t len, 5725 struct ieee80211_rx_status *rx_status) 5726 { 5727 struct ieee80211_sub_if_data *sdata = link->sdata; 5728 struct ieee80211_local *local = sdata->local; 5729 struct ieee80211_bss *bss; 5730 struct ieee80211_channel *channel; 5731 5732 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5733 5734 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5735 ieee80211_rx_status_to_khz(rx_status)); 5736 if (!channel) 5737 return; 5738 5739 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5740 if (bss) { 5741 link->conf->beacon_rate = bss->beacon_rate; 5742 ieee80211_rx_bss_put(local, bss); 5743 } 5744 } 5745 5746 5747 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5748 struct sk_buff *skb) 5749 { 5750 struct ieee80211_sub_if_data *sdata = link->sdata; 5751 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5752 struct ieee80211_if_managed *ifmgd; 5753 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5754 struct ieee80211_channel *channel; 5755 size_t baselen, len = skb->len; 5756 5757 ifmgd = &sdata->u.mgd; 5758 5759 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5760 5761 /* 5762 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5763 * "If a 6 GHz AP receives a Probe Request frame and responds with 5764 * a Probe Response frame [..], the Address 1 field of the Probe 5765 * Response frame shall be set to the broadcast address [..]" 5766 * So, on 6GHz band we should also accept broadcast responses. 5767 */ 5768 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5769 rx_status->freq); 5770 if (!channel) 5771 return; 5772 5773 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5774 (channel->band != NL80211_BAND_6GHZ || 5775 !is_broadcast_ether_addr(mgmt->da))) 5776 return; /* ignore ProbeResp to foreign address */ 5777 5778 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5779 if (baselen > len) 5780 return; 5781 5782 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5783 5784 if (ifmgd->associated && 5785 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5786 ieee80211_reset_ap_probe(sdata); 5787 } 5788 5789 /* 5790 * This is the canonical list of information elements we care about, 5791 * the filter code also gives us all changes to the Microsoft OUI 5792 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5793 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5794 * changes to requested client power. 5795 * 5796 * We implement beacon filtering in software since that means we can 5797 * avoid processing the frame here and in cfg80211, and userspace 5798 * will not be able to tell whether the hardware supports it or not. 5799 * 5800 * XXX: This list needs to be dynamic -- userspace needs to be able to 5801 * add items it requires. It also needs to be able to tell us to 5802 * look out for other vendor IEs. 5803 */ 5804 static const u64 care_about_ies = 5805 (1ULL << WLAN_EID_COUNTRY) | 5806 (1ULL << WLAN_EID_ERP_INFO) | 5807 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5808 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5809 (1ULL << WLAN_EID_HT_CAPABILITY) | 5810 (1ULL << WLAN_EID_HT_OPERATION) | 5811 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5812 5813 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5814 struct ieee80211_if_managed *ifmgd, 5815 struct ieee80211_bss_conf *bss_conf, 5816 struct ieee80211_local *local, 5817 struct ieee80211_rx_status *rx_status) 5818 { 5819 struct ieee80211_sub_if_data *sdata = link->sdata; 5820 5821 /* Track average RSSI from the Beacon frames of the current AP */ 5822 5823 if (!link->u.mgd.tracking_signal_avg) { 5824 link->u.mgd.tracking_signal_avg = true; 5825 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5826 link->u.mgd.last_cqm_event_signal = 0; 5827 link->u.mgd.count_beacon_signal = 1; 5828 link->u.mgd.last_ave_beacon_signal = 0; 5829 } else { 5830 link->u.mgd.count_beacon_signal++; 5831 } 5832 5833 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5834 -rx_status->signal); 5835 5836 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5837 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5838 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5839 int last_sig = link->u.mgd.last_ave_beacon_signal; 5840 struct ieee80211_event event = { 5841 .type = RSSI_EVENT, 5842 }; 5843 5844 /* 5845 * if signal crosses either of the boundaries, invoke callback 5846 * with appropriate parameters 5847 */ 5848 if (sig > ifmgd->rssi_max_thold && 5849 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5850 link->u.mgd.last_ave_beacon_signal = sig; 5851 event.u.rssi.data = RSSI_EVENT_HIGH; 5852 drv_event_callback(local, sdata, &event); 5853 } else if (sig < ifmgd->rssi_min_thold && 5854 (last_sig >= ifmgd->rssi_max_thold || 5855 last_sig == 0)) { 5856 link->u.mgd.last_ave_beacon_signal = sig; 5857 event.u.rssi.data = RSSI_EVENT_LOW; 5858 drv_event_callback(local, sdata, &event); 5859 } 5860 } 5861 5862 if (bss_conf->cqm_rssi_thold && 5863 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5864 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5865 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5866 int last_event = link->u.mgd.last_cqm_event_signal; 5867 int thold = bss_conf->cqm_rssi_thold; 5868 int hyst = bss_conf->cqm_rssi_hyst; 5869 5870 if (sig < thold && 5871 (last_event == 0 || sig < last_event - hyst)) { 5872 link->u.mgd.last_cqm_event_signal = sig; 5873 ieee80211_cqm_rssi_notify( 5874 &sdata->vif, 5875 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5876 sig, GFP_KERNEL); 5877 } else if (sig > thold && 5878 (last_event == 0 || sig > last_event + hyst)) { 5879 link->u.mgd.last_cqm_event_signal = sig; 5880 ieee80211_cqm_rssi_notify( 5881 &sdata->vif, 5882 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5883 sig, GFP_KERNEL); 5884 } 5885 } 5886 5887 if (bss_conf->cqm_rssi_low && 5888 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5889 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5890 int last_event = link->u.mgd.last_cqm_event_signal; 5891 int low = bss_conf->cqm_rssi_low; 5892 int high = bss_conf->cqm_rssi_high; 5893 5894 if (sig < low && 5895 (last_event == 0 || last_event >= low)) { 5896 link->u.mgd.last_cqm_event_signal = sig; 5897 ieee80211_cqm_rssi_notify( 5898 &sdata->vif, 5899 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5900 sig, GFP_KERNEL); 5901 } else if (sig > high && 5902 (last_event == 0 || last_event <= high)) { 5903 link->u.mgd.last_cqm_event_signal = sig; 5904 ieee80211_cqm_rssi_notify( 5905 &sdata->vif, 5906 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5907 sig, GFP_KERNEL); 5908 } 5909 } 5910 } 5911 5912 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5913 struct cfg80211_bss *bss) 5914 { 5915 if (ether_addr_equal(tx_bssid, bss->bssid)) 5916 return true; 5917 if (!bss->transmitted_bss) 5918 return false; 5919 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5920 } 5921 5922 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5923 struct wiphy_work *work) 5924 { 5925 struct ieee80211_sub_if_data *sdata = 5926 container_of(work, struct ieee80211_sub_if_data, 5927 u.mgd.ml_reconf_work.work); 5928 u16 new_valid_links, new_active_links, new_dormant_links; 5929 int ret; 5930 5931 if (!sdata->u.mgd.removed_links) 5932 return; 5933 5934 sdata_info(sdata, 5935 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5936 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5937 5938 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5939 if (new_valid_links == sdata->vif.valid_links) 5940 return; 5941 5942 if (!new_valid_links || 5943 !(new_valid_links & ~sdata->vif.dormant_links)) { 5944 sdata_info(sdata, "No valid links after reconfiguration\n"); 5945 ret = -EINVAL; 5946 goto out; 5947 } 5948 5949 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5950 if (new_active_links != sdata->vif.active_links) { 5951 if (!new_active_links) 5952 new_active_links = 5953 BIT(ffs(new_valid_links & 5954 ~sdata->vif.dormant_links) - 1); 5955 5956 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 5957 if (ret) { 5958 sdata_info(sdata, 5959 "Failed setting active links\n"); 5960 goto out; 5961 } 5962 } 5963 5964 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 5965 5966 ret = ieee80211_vif_set_links(sdata, new_valid_links, 5967 new_dormant_links); 5968 if (ret) 5969 sdata_info(sdata, "Failed setting valid links\n"); 5970 5971 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 5972 5973 out: 5974 if (!ret) 5975 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5976 else 5977 __ieee80211_disconnect(sdata); 5978 5979 sdata->u.mgd.removed_links = 0; 5980 } 5981 5982 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5983 struct ieee802_11_elems *elems) 5984 { 5985 const struct element *sub; 5986 unsigned long removed_links = 0; 5987 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5988 u8 link_id; 5989 u32 delay; 5990 5991 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5992 return; 5993 5994 /* Directly parse the sub elements as the common information doesn't 5995 * hold any useful information. 5996 */ 5997 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 5998 elems->ml_reconf_len) { 5999 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6000 u8 *pos = prof->variable; 6001 u16 control; 6002 6003 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6004 continue; 6005 6006 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6007 sub->datalen)) 6008 return; 6009 6010 control = le16_to_cpu(prof->control); 6011 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6012 6013 removed_links |= BIT(link_id); 6014 6015 /* the MAC address should not be included, but handle it */ 6016 if (control & 6017 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6018 pos += 6; 6019 6020 /* According to Draft P802.11be_D3.0, the control should 6021 * include the AP Removal Timer present. If the AP Removal Timer 6022 * is not present assume immediate removal. 6023 */ 6024 if (control & 6025 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6026 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6027 } 6028 6029 removed_links &= sdata->vif.valid_links; 6030 if (!removed_links) { 6031 /* In case the removal was cancelled, abort it */ 6032 if (sdata->u.mgd.removed_links) { 6033 sdata->u.mgd.removed_links = 0; 6034 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6035 &sdata->u.mgd.ml_reconf_work); 6036 } 6037 return; 6038 } 6039 6040 delay = 0; 6041 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6042 struct ieee80211_bss_conf *link_conf = 6043 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6044 u32 link_delay; 6045 6046 if (!link_conf) { 6047 removed_links &= ~BIT(link_id); 6048 continue; 6049 } 6050 6051 if (link_removal_timeout[link_id] < 1) 6052 link_delay = 0; 6053 else 6054 link_delay = link_conf->beacon_int * 6055 (link_removal_timeout[link_id] - 1); 6056 6057 if (!delay) 6058 delay = link_delay; 6059 else 6060 delay = min(delay, link_delay); 6061 } 6062 6063 sdata->u.mgd.removed_links = removed_links; 6064 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6065 &sdata->u.mgd.ml_reconf_work, 6066 TU_TO_JIFFIES(delay)); 6067 } 6068 6069 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6070 u16 active_links, u16 dormant_links, 6071 u16 suspended_links) 6072 { 6073 u64 changed = 0; 6074 int ret; 6075 6076 if (!active_links) { 6077 ret = -EINVAL; 6078 goto out; 6079 } 6080 6081 /* If there is an active negotiated TTLM, it should be discarded by 6082 * the new negotiated/advertised TTLM. 6083 */ 6084 if (sdata->vif.neg_ttlm.valid) { 6085 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6086 sdata->vif.suspended_links = 0; 6087 changed = BSS_CHANGED_MLD_TTLM; 6088 } 6089 6090 if (sdata->vif.active_links != active_links) { 6091 /* usable links are affected when active_links are changed, 6092 * so notify the driver about the status change 6093 */ 6094 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6095 active_links &= sdata->vif.active_links; 6096 if (!active_links) 6097 active_links = 6098 BIT(__ffs(sdata->vif.valid_links & 6099 ~dormant_links)); 6100 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6101 if (ret) { 6102 sdata_info(sdata, "Failed to set TTLM active links\n"); 6103 goto out; 6104 } 6105 } 6106 6107 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6108 dormant_links); 6109 if (ret) { 6110 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6111 goto out; 6112 } 6113 6114 sdata->vif.suspended_links = suspended_links; 6115 if (sdata->vif.suspended_links) 6116 changed |= BSS_CHANGED_MLD_TTLM; 6117 6118 ieee80211_vif_cfg_change_notify(sdata, changed); 6119 6120 out: 6121 if (ret) 6122 ieee80211_disconnect(&sdata->vif, false); 6123 6124 return ret; 6125 } 6126 6127 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6128 struct wiphy_work *work) 6129 { 6130 u16 new_active_links, new_dormant_links; 6131 struct ieee80211_sub_if_data *sdata = 6132 container_of(work, struct ieee80211_sub_if_data, 6133 u.mgd.ttlm_work.work); 6134 6135 new_active_links = sdata->u.mgd.ttlm_info.map & 6136 sdata->vif.valid_links; 6137 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6138 sdata->vif.valid_links; 6139 6140 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6141 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6142 0)) 6143 return; 6144 6145 sdata->u.mgd.ttlm_info.active = true; 6146 sdata->u.mgd.ttlm_info.switch_time = 0; 6147 } 6148 6149 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6150 { 6151 if (bm_size == 1) 6152 return *data; 6153 else 6154 return get_unaligned_le16(data); 6155 } 6156 6157 static int 6158 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6159 const struct ieee80211_ttlm_elem *ttlm, 6160 struct ieee80211_adv_ttlm_info *ttlm_info) 6161 { 6162 /* The element size was already validated in 6163 * ieee80211_tid_to_link_map_size_ok() 6164 */ 6165 u8 control, link_map_presence, map_size, tid; 6166 u8 *pos; 6167 6168 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6169 pos = (void *)ttlm->optional; 6170 control = ttlm->control; 6171 6172 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6173 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6174 return 0; 6175 6176 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6177 IEEE80211_TTLM_DIRECTION_BOTH) { 6178 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6179 return -EINVAL; 6180 } 6181 6182 link_map_presence = *pos; 6183 pos++; 6184 6185 ttlm_info->switch_time = get_unaligned_le16(pos); 6186 6187 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6188 * by 1. 6189 */ 6190 if (!ttlm_info->switch_time) 6191 ttlm_info->switch_time = 1; 6192 6193 pos += 2; 6194 6195 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6196 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6197 pos += 3; 6198 } 6199 6200 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6201 map_size = 1; 6202 else 6203 map_size = 2; 6204 6205 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6206 * not advertise a TID-to-link mapping that does not map all TIDs to the 6207 * same link set, reject frame if not all links have mapping 6208 */ 6209 if (link_map_presence != 0xff) { 6210 sdata_info(sdata, 6211 "Invalid advertised T2L mapping presence indicator\n"); 6212 return -EINVAL; 6213 } 6214 6215 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6216 if (!ttlm_info->map) { 6217 sdata_info(sdata, 6218 "Invalid advertised T2L map for TID 0\n"); 6219 return -EINVAL; 6220 } 6221 6222 pos += map_size; 6223 6224 for (tid = 1; tid < 8; tid++) { 6225 u16 map = ieee80211_get_ttlm(map_size, pos); 6226 6227 if (map != ttlm_info->map) { 6228 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6229 tid); 6230 return -EINVAL; 6231 } 6232 6233 pos += map_size; 6234 } 6235 return 0; 6236 } 6237 6238 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6239 struct ieee802_11_elems *elems, 6240 u64 beacon_ts) 6241 { 6242 u8 i; 6243 int ret; 6244 6245 if (!ieee80211_vif_is_mld(&sdata->vif)) 6246 return; 6247 6248 if (!elems->ttlm_num) { 6249 if (sdata->u.mgd.ttlm_info.switch_time) { 6250 /* if a planned TID-to-link mapping was cancelled - 6251 * abort it 6252 */ 6253 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6254 &sdata->u.mgd.ttlm_work); 6255 } else if (sdata->u.mgd.ttlm_info.active) { 6256 /* if no TID-to-link element, set to default mapping in 6257 * which all TIDs are mapped to all setup links 6258 */ 6259 ret = ieee80211_vif_set_links(sdata, 6260 sdata->vif.valid_links, 6261 0); 6262 if (ret) { 6263 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6264 return; 6265 } 6266 ieee80211_vif_cfg_change_notify(sdata, 6267 BSS_CHANGED_MLD_VALID_LINKS); 6268 } 6269 memset(&sdata->u.mgd.ttlm_info, 0, 6270 sizeof(sdata->u.mgd.ttlm_info)); 6271 return; 6272 } 6273 6274 for (i = 0; i < elems->ttlm_num; i++) { 6275 struct ieee80211_adv_ttlm_info ttlm_info; 6276 u32 res; 6277 6278 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6279 &ttlm_info); 6280 6281 if (res) { 6282 __ieee80211_disconnect(sdata); 6283 return; 6284 } 6285 6286 if (ttlm_info.switch_time) { 6287 u16 beacon_ts_tu, st_tu, delay; 6288 u32 delay_jiffies; 6289 u64 mask; 6290 6291 /* The t2l map switch time is indicated with a partial 6292 * TSF value (bits 10 to 25), get the partial beacon TS 6293 * as well, and calc the delay to the start time. 6294 */ 6295 mask = GENMASK_ULL(25, 10); 6296 beacon_ts_tu = (beacon_ts & mask) >> 10; 6297 st_tu = ttlm_info.switch_time; 6298 delay = st_tu - beacon_ts_tu; 6299 6300 /* 6301 * If the switch time is far in the future, then it 6302 * could also be the previous switch still being 6303 * announced. 6304 * We can simply ignore it for now, if it is a future 6305 * switch the AP will continue to announce it anyway. 6306 */ 6307 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6308 return; 6309 6310 delay_jiffies = TU_TO_JIFFIES(delay); 6311 6312 /* Link switching can take time, so schedule it 6313 * 100ms before to be ready on time 6314 */ 6315 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6316 delay_jiffies -= 6317 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6318 else 6319 delay_jiffies = 0; 6320 6321 sdata->u.mgd.ttlm_info = ttlm_info; 6322 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6323 &sdata->u.mgd.ttlm_work); 6324 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6325 &sdata->u.mgd.ttlm_work, 6326 delay_jiffies); 6327 return; 6328 } 6329 } 6330 } 6331 6332 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6333 struct ieee80211_hdr *hdr, size_t len, 6334 struct ieee80211_rx_status *rx_status) 6335 { 6336 struct ieee80211_sub_if_data *sdata = link->sdata; 6337 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6338 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6339 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6340 struct ieee80211_mgmt *mgmt = (void *) hdr; 6341 size_t baselen; 6342 struct ieee802_11_elems *elems; 6343 struct ieee80211_local *local = sdata->local; 6344 struct ieee80211_chanctx_conf *chanctx_conf; 6345 struct ieee80211_supported_band *sband; 6346 struct ieee80211_channel *chan; 6347 struct link_sta_info *link_sta; 6348 struct sta_info *sta; 6349 u64 changed = 0; 6350 bool erp_valid; 6351 u8 erp_value = 0; 6352 u32 ncrc = 0; 6353 u8 *bssid, *variable = mgmt->u.beacon.variable; 6354 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6355 struct ieee80211_elems_parse_params parse_params = { 6356 .mode = link->u.mgd.conn.mode, 6357 .link_id = -1, 6358 .from_ap = true, 6359 }; 6360 6361 lockdep_assert_wiphy(local->hw.wiphy); 6362 6363 /* Process beacon from the current BSS */ 6364 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6365 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6366 struct ieee80211_ext *ext = (void *) mgmt; 6367 6368 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6369 variable = ext->u.s1g_short_beacon.variable; 6370 else 6371 variable = ext->u.s1g_beacon.variable; 6372 } 6373 6374 baselen = (u8 *) variable - (u8 *) mgmt; 6375 if (baselen > len) 6376 return; 6377 6378 parse_params.start = variable; 6379 parse_params.len = len - baselen; 6380 6381 rcu_read_lock(); 6382 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6383 if (!chanctx_conf) { 6384 rcu_read_unlock(); 6385 return; 6386 } 6387 6388 if (ieee80211_rx_status_to_khz(rx_status) != 6389 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6390 rcu_read_unlock(); 6391 return; 6392 } 6393 chan = chanctx_conf->def.chan; 6394 rcu_read_unlock(); 6395 6396 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6397 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6398 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6399 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6400 elems = ieee802_11_parse_elems_full(&parse_params); 6401 if (!elems) 6402 return; 6403 6404 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6405 6406 if (elems->dtim_period) 6407 link->u.mgd.dtim_period = elems->dtim_period; 6408 link->u.mgd.have_beacon = true; 6409 ifmgd->assoc_data->need_beacon = false; 6410 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6411 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6412 link->conf->sync_tsf = 6413 le64_to_cpu(mgmt->u.beacon.timestamp); 6414 link->conf->sync_device_ts = 6415 rx_status->device_timestamp; 6416 link->conf->sync_dtim_count = elems->dtim_count; 6417 } 6418 6419 if (elems->mbssid_config_ie) 6420 bss_conf->profile_periodicity = 6421 elems->mbssid_config_ie->profile_periodicity; 6422 else 6423 bss_conf->profile_periodicity = 0; 6424 6425 if (elems->ext_capab_len >= 11 && 6426 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6427 bss_conf->ema_ap = true; 6428 else 6429 bss_conf->ema_ap = false; 6430 6431 /* continue assoc process */ 6432 ifmgd->assoc_data->timeout = jiffies; 6433 ifmgd->assoc_data->timeout_started = true; 6434 run_again(sdata, ifmgd->assoc_data->timeout); 6435 kfree(elems); 6436 return; 6437 } 6438 6439 if (!ifmgd->associated || 6440 !ieee80211_rx_our_beacon(bssid, link->conf->bss)) 6441 return; 6442 bssid = link->u.mgd.bssid; 6443 6444 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6445 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6446 local, rx_status); 6447 6448 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6449 mlme_dbg_ratelimited(sdata, 6450 "cancelling AP probe due to a received beacon\n"); 6451 ieee80211_reset_ap_probe(sdata); 6452 } 6453 6454 /* 6455 * Push the beacon loss detection into the future since 6456 * we are processing a beacon from the AP just now. 6457 */ 6458 ieee80211_sta_reset_beacon_monitor(sdata); 6459 6460 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6461 * element (which carries the beacon interval). Don't forget to add a 6462 * bit to care_about_ies[] above if mac80211 is interested in a 6463 * changing S1G element. 6464 */ 6465 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6466 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6467 parse_params.bss = link->conf->bss; 6468 parse_params.filter = care_about_ies; 6469 parse_params.crc = ncrc; 6470 elems = ieee802_11_parse_elems_full(&parse_params); 6471 if (!elems) 6472 return; 6473 ncrc = elems->crc; 6474 6475 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6476 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6477 if (local->hw.conf.dynamic_ps_timeout > 0) { 6478 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6479 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6480 ieee80211_hw_config(local, 6481 IEEE80211_CONF_CHANGE_PS); 6482 } 6483 ieee80211_send_nullfunc(local, sdata, false); 6484 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6485 local->pspolling = true; 6486 6487 /* 6488 * Here is assumed that the driver will be 6489 * able to send ps-poll frame and receive a 6490 * response even though power save mode is 6491 * enabled, but some drivers might require 6492 * to disable power save here. This needs 6493 * to be investigated. 6494 */ 6495 ieee80211_send_pspoll(local, sdata); 6496 } 6497 } 6498 6499 if (sdata->vif.p2p || 6500 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6501 struct ieee80211_p2p_noa_attr noa = {}; 6502 int ret; 6503 6504 ret = cfg80211_get_p2p_attr(variable, 6505 len - baselen, 6506 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6507 (u8 *) &noa, sizeof(noa)); 6508 if (ret >= 2) { 6509 if (link->u.mgd.p2p_noa_index != noa.index) { 6510 /* valid noa_attr and index changed */ 6511 link->u.mgd.p2p_noa_index = noa.index; 6512 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6513 changed |= BSS_CHANGED_P2P_PS; 6514 /* 6515 * make sure we update all information, the CRC 6516 * mechanism doesn't look at P2P attributes. 6517 */ 6518 link->u.mgd.beacon_crc_valid = false; 6519 } 6520 } else if (link->u.mgd.p2p_noa_index != -1) { 6521 /* noa_attr not found and we had valid noa_attr before */ 6522 link->u.mgd.p2p_noa_index = -1; 6523 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6524 changed |= BSS_CHANGED_P2P_PS; 6525 link->u.mgd.beacon_crc_valid = false; 6526 } 6527 } 6528 6529 /* 6530 * Update beacon timing and dtim count on every beacon appearance. This 6531 * will allow the driver to use the most updated values. Do it before 6532 * comparing this one with last received beacon. 6533 * IMPORTANT: These parameters would possibly be out of sync by the time 6534 * the driver will use them. The synchronized view is currently 6535 * guaranteed only in certain callbacks. 6536 */ 6537 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6538 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6539 link->conf->sync_tsf = 6540 le64_to_cpu(mgmt->u.beacon.timestamp); 6541 link->conf->sync_device_ts = 6542 rx_status->device_timestamp; 6543 link->conf->sync_dtim_count = elems->dtim_count; 6544 } 6545 6546 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6547 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6548 goto free; 6549 link->u.mgd.beacon_crc = ncrc; 6550 link->u.mgd.beacon_crc_valid = true; 6551 6552 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6553 6554 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6555 rx_status->device_timestamp, 6556 elems, true); 6557 6558 if (!link->u.mgd.disable_wmm_tracking && 6559 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6560 elems->wmm_param_len, 6561 elems->mu_edca_param_set)) 6562 changed |= BSS_CHANGED_QOS; 6563 6564 /* 6565 * If we haven't had a beacon before, tell the driver about the 6566 * DTIM period (and beacon timing if desired) now. 6567 */ 6568 if (!link->u.mgd.have_beacon) { 6569 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6570 bss_conf->dtim_period = elems->dtim_period ?: 1; 6571 6572 changed |= BSS_CHANGED_BEACON_INFO; 6573 link->u.mgd.have_beacon = true; 6574 6575 ieee80211_recalc_ps(local); 6576 6577 ieee80211_recalc_ps_vif(sdata); 6578 } 6579 6580 if (elems->erp_info) { 6581 erp_valid = true; 6582 erp_value = elems->erp_info[0]; 6583 } else { 6584 erp_valid = false; 6585 } 6586 6587 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6588 changed |= ieee80211_handle_bss_capability(link, 6589 le16_to_cpu(mgmt->u.beacon.capab_info), 6590 erp_valid, erp_value); 6591 6592 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6593 if (WARN_ON(!sta)) { 6594 goto free; 6595 } 6596 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6597 lockdep_is_held(&local->hw.wiphy->mtx)); 6598 if (WARN_ON(!link_sta)) { 6599 goto free; 6600 } 6601 6602 if (WARN_ON(!link->conf->chanreq.oper.chan)) 6603 goto free; 6604 6605 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 6606 6607 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6608 6609 if (ieee80211_config_bw(link, elems, true, &changed)) { 6610 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6611 WLAN_REASON_DEAUTH_LEAVING, 6612 true, deauth_buf); 6613 ieee80211_report_disconnect(sdata, deauth_buf, 6614 sizeof(deauth_buf), true, 6615 WLAN_REASON_DEAUTH_LEAVING, 6616 false); 6617 goto free; 6618 } 6619 6620 if (elems->opmode_notif) 6621 ieee80211_vht_handle_opmode(sdata, link_sta, 6622 *elems->opmode_notif, 6623 rx_status->band); 6624 6625 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6626 elems->country_elem, 6627 elems->country_elem_len, 6628 elems->pwr_constr_elem, 6629 elems->cisco_dtpc_elem); 6630 6631 ieee80211_ml_reconfiguration(sdata, elems); 6632 ieee80211_process_adv_ttlm(sdata, elems, 6633 le64_to_cpu(mgmt->u.beacon.timestamp)); 6634 6635 ieee80211_link_info_change_notify(sdata, link, changed); 6636 free: 6637 kfree(elems); 6638 } 6639 6640 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6641 struct ieee80211_neg_ttlm neg_ttlm) 6642 { 6643 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 6644 u8 i; 6645 6646 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 6647 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 6648 6649 /* If there is an active TTLM, unset previously suspended links */ 6650 if (sdata->vif.neg_ttlm.valid) 6651 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 6652 6653 /* exclude links that are already disabled by advertised TTLM */ 6654 new_active_links = 6655 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 6656 new_suspended_links = 6657 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 6658 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 6659 if (ieee80211_ttlm_set_links(sdata, new_active_links, 6660 new_dormant_links, new_suspended_links)) 6661 return; 6662 6663 sdata->vif.neg_ttlm = neg_ttlm; 6664 sdata->vif.neg_ttlm.valid = true; 6665 } 6666 6667 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 6668 struct wiphy_work *work) 6669 { 6670 struct ieee80211_sub_if_data *sdata = 6671 container_of(work, struct ieee80211_sub_if_data, 6672 u.mgd.neg_ttlm_timeout_work.work); 6673 6674 sdata_info(sdata, 6675 "No negotiated TTLM response from AP, disconnecting.\n"); 6676 6677 __ieee80211_disconnect(sdata); 6678 } 6679 6680 static void 6681 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 6682 struct ieee80211_neg_ttlm *neg_ttlm) 6683 { 6684 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 6685 6686 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 6687 sizeof(neg_ttlm->downlink))) { 6688 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 6689 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 6690 } else { 6691 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 6692 } 6693 6694 for (i = 0; i < ARRAY_SIZE(direction); i++) { 6695 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 6696 __le16 map; 6697 6698 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 6699 6700 pos = skb_put(skb, len + 2); 6701 *pos++ = WLAN_EID_EXTENSION; 6702 len_pos = pos++; 6703 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 6704 *pos++ = direction[i]; 6705 map_ind_pos = pos++; 6706 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6707 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 6708 cpu_to_le16(neg_ttlm->uplink[tid]) : 6709 cpu_to_le16(neg_ttlm->downlink[tid]); 6710 if (!map) 6711 continue; 6712 6713 len += 2; 6714 map_ind |= BIT(tid); 6715 skb_put_data(skb, &map, sizeof(map)); 6716 } 6717 6718 *map_ind_pos = map_ind; 6719 *len_pos = len; 6720 6721 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 6722 break; 6723 } 6724 } 6725 6726 static void 6727 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6728 struct ieee80211_neg_ttlm *neg_ttlm, 6729 u8 dialog_token) 6730 { 6731 struct ieee80211_local *local = sdata->local; 6732 struct ieee80211_mgmt *mgmt; 6733 struct sk_buff *skb; 6734 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 6735 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6736 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6737 6738 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6739 if (!skb) 6740 return; 6741 6742 skb_reserve(skb, local->tx_headroom); 6743 mgmt = skb_put_zero(skb, hdr_len); 6744 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6745 IEEE80211_STYPE_ACTION); 6746 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6747 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6748 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6749 6750 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6751 mgmt->u.action.u.ttlm_req.action_code = 6752 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 6753 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 6754 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6755 ieee80211_tx_skb(sdata, skb); 6756 } 6757 6758 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6759 struct cfg80211_ttlm_params *params) 6760 { 6761 struct ieee80211_neg_ttlm neg_ttlm = {}; 6762 u8 i; 6763 6764 if (!ieee80211_vif_is_mld(&sdata->vif) || 6765 !(sdata->vif.cfg.mld_capa_op & 6766 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 6767 return -EINVAL; 6768 6769 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6770 if ((params->dlink[i] & ~sdata->vif.valid_links) || 6771 (params->ulink[i] & ~sdata->vif.valid_links)) 6772 return -EINVAL; 6773 6774 neg_ttlm.downlink[i] = params->dlink[i]; 6775 neg_ttlm.uplink[i] = params->ulink[i]; 6776 } 6777 6778 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 6779 NEG_TTLM_RES_ACCEPT) 6780 return -EINVAL; 6781 6782 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6783 sdata->u.mgd.dialog_token_alloc++; 6784 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 6785 sdata->u.mgd.dialog_token_alloc); 6786 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6787 &sdata->u.mgd.neg_ttlm_timeout_work); 6788 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6789 &sdata->u.mgd.neg_ttlm_timeout_work, 6790 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 6791 return 0; 6792 } 6793 6794 static void 6795 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6796 enum ieee80211_neg_ttlm_res ttlm_res, 6797 u8 dialog_token, 6798 struct ieee80211_neg_ttlm *neg_ttlm) 6799 { 6800 struct ieee80211_local *local = sdata->local; 6801 struct ieee80211_mgmt *mgmt; 6802 struct sk_buff *skb; 6803 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 6804 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6805 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6806 6807 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6808 if (!skb) 6809 return; 6810 6811 skb_reserve(skb, local->tx_headroom); 6812 mgmt = skb_put_zero(skb, hdr_len); 6813 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6814 IEEE80211_STYPE_ACTION); 6815 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6816 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6817 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6818 6819 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6820 mgmt->u.action.u.ttlm_res.action_code = 6821 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 6822 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 6823 switch (ttlm_res) { 6824 default: 6825 WARN_ON(1); 6826 fallthrough; 6827 case NEG_TTLM_RES_REJECT: 6828 mgmt->u.action.u.ttlm_res.status_code = 6829 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 6830 break; 6831 case NEG_TTLM_RES_ACCEPT: 6832 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 6833 break; 6834 case NEG_TTLM_RES_SUGGEST_PREFERRED: 6835 mgmt->u.action.u.ttlm_res.status_code = 6836 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 6837 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6838 break; 6839 } 6840 6841 ieee80211_tx_skb(sdata, skb); 6842 } 6843 6844 static int 6845 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6846 const struct ieee80211_ttlm_elem *ttlm, 6847 struct ieee80211_neg_ttlm *neg_ttlm, 6848 u8 *direction) 6849 { 6850 u8 control, link_map_presence, map_size, tid; 6851 u8 *pos; 6852 6853 /* The element size was already validated in 6854 * ieee80211_tid_to_link_map_size_ok() 6855 */ 6856 pos = (void *)ttlm->optional; 6857 6858 control = ttlm->control; 6859 6860 /* mapping switch time and expected duration fields are not expected 6861 * in case of negotiated TTLM 6862 */ 6863 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 6864 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 6865 mlme_dbg(sdata, 6866 "Invalid TTLM element in negotiated TTLM request\n"); 6867 return -EINVAL; 6868 } 6869 6870 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6871 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6872 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 6873 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 6874 } 6875 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 6876 return 0; 6877 } 6878 6879 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 6880 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 6881 *direction != IEEE80211_TTLM_DIRECTION_UP && 6882 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 6883 return -EINVAL; 6884 6885 link_map_presence = *pos; 6886 pos++; 6887 6888 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6889 map_size = 1; 6890 else 6891 map_size = 2; 6892 6893 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6894 u16 map; 6895 6896 if (link_map_presence & BIT(tid)) { 6897 map = ieee80211_get_ttlm(map_size, pos); 6898 if (!map) { 6899 mlme_dbg(sdata, 6900 "No active links for TID %d", tid); 6901 return -EINVAL; 6902 } 6903 } else { 6904 map = 0; 6905 } 6906 6907 switch (*direction) { 6908 case IEEE80211_TTLM_DIRECTION_BOTH: 6909 neg_ttlm->downlink[tid] = map; 6910 neg_ttlm->uplink[tid] = map; 6911 break; 6912 case IEEE80211_TTLM_DIRECTION_DOWN: 6913 neg_ttlm->downlink[tid] = map; 6914 break; 6915 case IEEE80211_TTLM_DIRECTION_UP: 6916 neg_ttlm->uplink[tid] = map; 6917 break; 6918 default: 6919 return -EINVAL; 6920 } 6921 pos += map_size; 6922 } 6923 return 0; 6924 } 6925 6926 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6927 struct ieee80211_mgmt *mgmt, size_t len) 6928 { 6929 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 6930 size_t ies_len; 6931 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 6932 struct ieee802_11_elems *elems = NULL; 6933 struct ieee80211_neg_ttlm neg_ttlm = {}; 6934 6935 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 6936 6937 if (!ieee80211_vif_is_mld(&sdata->vif)) 6938 return; 6939 6940 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 6941 ies_len = len - offsetof(struct ieee80211_mgmt, 6942 u.action.u.ttlm_req.variable); 6943 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 6944 ies_len, true, NULL); 6945 if (!elems) { 6946 ttlm_res = NEG_TTLM_RES_REJECT; 6947 goto out; 6948 } 6949 6950 for (i = 0; i < elems->ttlm_num; i++) { 6951 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 6952 &neg_ttlm, &direction[i]) || 6953 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 6954 elems->ttlm_num != 1)) { 6955 ttlm_res = NEG_TTLM_RES_REJECT; 6956 goto out; 6957 } 6958 } 6959 6960 if (!elems->ttlm_num || 6961 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 6962 ttlm_res = NEG_TTLM_RES_REJECT; 6963 goto out; 6964 } 6965 6966 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6967 if ((neg_ttlm.downlink[i] && 6968 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 6969 (neg_ttlm.uplink[i] && 6970 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 6971 ttlm_res = NEG_TTLM_RES_REJECT; 6972 goto out; 6973 } 6974 } 6975 6976 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 6977 6978 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 6979 goto out; 6980 6981 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6982 out: 6983 kfree(elems); 6984 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 6985 } 6986 6987 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6988 struct ieee80211_mgmt *mgmt, size_t len) 6989 { 6990 if (!ieee80211_vif_is_mld(&sdata->vif) || 6991 mgmt->u.action.u.ttlm_req.dialog_token != 6992 sdata->u.mgd.dialog_token_alloc) 6993 return; 6994 6995 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6996 &sdata->u.mgd.neg_ttlm_timeout_work); 6997 6998 /* MLD station sends a TID to link mapping request, mainly to handle 6999 * BTM (BSS transition management) request, in which case it needs to 7000 * restrict the active links set. 7001 * In this case it's not expected that the MLD AP will reject the 7002 * negotiated TTLM request. 7003 * This can be better implemented in the future, to handle request 7004 * rejections. 7005 */ 7006 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7007 __ieee80211_disconnect(sdata); 7008 } 7009 7010 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7011 struct wiphy_work *work) 7012 { 7013 u16 new_dormant_links; 7014 struct ieee80211_sub_if_data *sdata = 7015 container_of(work, struct ieee80211_sub_if_data, 7016 u.mgd.neg_ttlm_timeout_work.work); 7017 7018 if (!sdata->vif.neg_ttlm.valid) 7019 return; 7020 7021 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7022 new_dormant_links = 7023 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7024 sdata->vif.suspended_links = 0; 7025 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7026 new_dormant_links); 7027 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7028 BSS_CHANGED_MLD_VALID_LINKS); 7029 } 7030 7031 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7032 { 7033 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7034 struct ieee80211_local *local = sdata->local; 7035 struct ieee80211_mgmt *mgmt; 7036 struct sk_buff *skb; 7037 int frame_len = offsetofend(struct ieee80211_mgmt, 7038 u.action.u.ttlm_tear_down); 7039 struct ieee80211_tx_info *info; 7040 7041 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7042 if (!skb) 7043 return; 7044 7045 skb_reserve(skb, local->hw.extra_tx_headroom); 7046 mgmt = skb_put_zero(skb, frame_len); 7047 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7048 IEEE80211_STYPE_ACTION); 7049 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7050 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7051 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7052 7053 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7054 mgmt->u.action.u.ttlm_tear_down.action_code = 7055 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7056 7057 info = IEEE80211_SKB_CB(skb); 7058 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7059 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7060 ieee80211_tx_skb(sdata, skb); 7061 } 7062 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7063 7064 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7065 struct sk_buff *skb) 7066 { 7067 struct ieee80211_link_data *link = &sdata->deflink; 7068 struct ieee80211_rx_status *rx_status; 7069 struct ieee80211_hdr *hdr; 7070 u16 fc; 7071 7072 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7073 7074 rx_status = (struct ieee80211_rx_status *) skb->cb; 7075 hdr = (struct ieee80211_hdr *) skb->data; 7076 fc = le16_to_cpu(hdr->frame_control); 7077 7078 switch (fc & IEEE80211_FCTL_STYPE) { 7079 case IEEE80211_STYPE_S1G_BEACON: 7080 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7081 break; 7082 } 7083 } 7084 7085 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7086 struct sk_buff *skb) 7087 { 7088 struct ieee80211_link_data *link = &sdata->deflink; 7089 struct ieee80211_rx_status *rx_status; 7090 struct ieee80211_mgmt *mgmt; 7091 u16 fc; 7092 int ies_len; 7093 7094 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7095 7096 rx_status = (struct ieee80211_rx_status *) skb->cb; 7097 mgmt = (struct ieee80211_mgmt *) skb->data; 7098 fc = le16_to_cpu(mgmt->frame_control); 7099 7100 if (rx_status->link_valid) { 7101 link = sdata_dereference(sdata->link[rx_status->link_id], 7102 sdata); 7103 if (!link) 7104 return; 7105 } 7106 7107 switch (fc & IEEE80211_FCTL_STYPE) { 7108 case IEEE80211_STYPE_BEACON: 7109 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7110 skb->len, rx_status); 7111 break; 7112 case IEEE80211_STYPE_PROBE_RESP: 7113 ieee80211_rx_mgmt_probe_resp(link, skb); 7114 break; 7115 case IEEE80211_STYPE_AUTH: 7116 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7117 break; 7118 case IEEE80211_STYPE_DEAUTH: 7119 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7120 break; 7121 case IEEE80211_STYPE_DISASSOC: 7122 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7123 break; 7124 case IEEE80211_STYPE_ASSOC_RESP: 7125 case IEEE80211_STYPE_REASSOC_RESP: 7126 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7127 break; 7128 case IEEE80211_STYPE_ACTION: 7129 if (!sdata->u.mgd.associated || 7130 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7131 break; 7132 7133 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 7134 struct ieee802_11_elems *elems; 7135 7136 ies_len = skb->len - 7137 offsetof(struct ieee80211_mgmt, 7138 u.action.u.chan_switch.variable); 7139 7140 if (ies_len < 0) 7141 break; 7142 7143 /* CSA IE cannot be overridden, no need for BSSID */ 7144 elems = ieee802_11_parse_elems( 7145 mgmt->u.action.u.chan_switch.variable, 7146 ies_len, true, NULL); 7147 7148 if (elems && !elems->parse_error) 7149 ieee80211_sta_process_chanswitch(link, 7150 rx_status->mactime, 7151 rx_status->device_timestamp, 7152 elems, false); 7153 kfree(elems); 7154 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 7155 struct ieee802_11_elems *elems; 7156 7157 ies_len = skb->len - 7158 offsetof(struct ieee80211_mgmt, 7159 u.action.u.ext_chan_switch.variable); 7160 7161 if (ies_len < 0) 7162 break; 7163 7164 /* 7165 * extended CSA IE can't be overridden, no need for 7166 * BSSID 7167 */ 7168 elems = ieee802_11_parse_elems( 7169 mgmt->u.action.u.ext_chan_switch.variable, 7170 ies_len, true, NULL); 7171 7172 if (elems && !elems->parse_error) { 7173 /* for the handling code pretend it was an IE */ 7174 elems->ext_chansw_ie = 7175 &mgmt->u.action.u.ext_chan_switch.data; 7176 7177 ieee80211_sta_process_chanswitch(link, 7178 rx_status->mactime, 7179 rx_status->device_timestamp, 7180 elems, false); 7181 } 7182 7183 kfree(elems); 7184 } 7185 break; 7186 } 7187 } 7188 7189 static void ieee80211_sta_timer(struct timer_list *t) 7190 { 7191 struct ieee80211_sub_if_data *sdata = 7192 from_timer(sdata, t, u.mgd.timer); 7193 7194 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7195 } 7196 7197 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7198 u8 reason, bool tx) 7199 { 7200 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7201 7202 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7203 tx, frame_buf); 7204 7205 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7206 reason, false); 7207 } 7208 7209 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7210 { 7211 struct ieee80211_local *local = sdata->local; 7212 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7213 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7214 u32 tx_flags = 0; 7215 u16 trans = 1; 7216 u16 status = 0; 7217 struct ieee80211_prep_tx_info info = { 7218 .subtype = IEEE80211_STYPE_AUTH, 7219 }; 7220 7221 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7222 7223 if (WARN_ON_ONCE(!auth_data)) 7224 return -EINVAL; 7225 7226 auth_data->tries++; 7227 7228 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7229 sdata_info(sdata, "authentication with %pM timed out\n", 7230 auth_data->ap_addr); 7231 7232 /* 7233 * Most likely AP is not in the range so remove the 7234 * bss struct for that AP. 7235 */ 7236 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7237 7238 return -ETIMEDOUT; 7239 } 7240 7241 if (auth_data->algorithm == WLAN_AUTH_SAE) 7242 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7243 7244 info.link_id = auth_data->link_id; 7245 drv_mgd_prepare_tx(local, sdata, &info); 7246 7247 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7248 auth_data->ap_addr, auth_data->tries, 7249 IEEE80211_AUTH_MAX_TRIES); 7250 7251 auth_data->expected_transaction = 2; 7252 7253 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7254 trans = auth_data->sae_trans; 7255 status = auth_data->sae_status; 7256 auth_data->expected_transaction = trans; 7257 } 7258 7259 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7260 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7261 IEEE80211_TX_INTFL_MLME_CONN_TX; 7262 7263 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7264 auth_data->data, auth_data->data_len, 7265 auth_data->ap_addr, auth_data->ap_addr, 7266 NULL, 0, 0, tx_flags); 7267 7268 if (tx_flags == 0) { 7269 if (auth_data->algorithm == WLAN_AUTH_SAE) 7270 auth_data->timeout = jiffies + 7271 IEEE80211_AUTH_TIMEOUT_SAE; 7272 else 7273 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7274 } else { 7275 auth_data->timeout = 7276 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7277 } 7278 7279 auth_data->timeout_started = true; 7280 run_again(sdata, auth_data->timeout); 7281 7282 return 0; 7283 } 7284 7285 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7286 { 7287 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7288 struct ieee80211_local *local = sdata->local; 7289 int ret; 7290 7291 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7292 7293 assoc_data->tries++; 7294 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7295 sdata_info(sdata, "association with %pM timed out\n", 7296 assoc_data->ap_addr); 7297 7298 /* 7299 * Most likely AP is not in the range so remove the 7300 * bss struct for that AP. 7301 */ 7302 cfg80211_unlink_bss(local->hw.wiphy, 7303 assoc_data->link[assoc_data->assoc_link_id].bss); 7304 7305 return -ETIMEDOUT; 7306 } 7307 7308 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7309 assoc_data->ap_addr, assoc_data->tries, 7310 IEEE80211_ASSOC_MAX_TRIES); 7311 ret = ieee80211_send_assoc(sdata); 7312 if (ret) 7313 return ret; 7314 7315 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7316 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7317 assoc_data->timeout_started = true; 7318 run_again(sdata, assoc_data->timeout); 7319 } else { 7320 assoc_data->timeout = 7321 round_jiffies_up(jiffies + 7322 IEEE80211_ASSOC_TIMEOUT_LONG); 7323 assoc_data->timeout_started = true; 7324 run_again(sdata, assoc_data->timeout); 7325 } 7326 7327 return 0; 7328 } 7329 7330 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7331 __le16 fc, bool acked) 7332 { 7333 struct ieee80211_local *local = sdata->local; 7334 7335 sdata->u.mgd.status_fc = fc; 7336 sdata->u.mgd.status_acked = acked; 7337 sdata->u.mgd.status_received = true; 7338 7339 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7340 } 7341 7342 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7343 { 7344 struct ieee80211_local *local = sdata->local; 7345 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7346 7347 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7348 7349 if (ifmgd->status_received) { 7350 __le16 fc = ifmgd->status_fc; 7351 bool status_acked = ifmgd->status_acked; 7352 7353 ifmgd->status_received = false; 7354 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7355 if (status_acked) { 7356 if (ifmgd->auth_data->algorithm == 7357 WLAN_AUTH_SAE) 7358 ifmgd->auth_data->timeout = 7359 jiffies + 7360 IEEE80211_AUTH_TIMEOUT_SAE; 7361 else 7362 ifmgd->auth_data->timeout = 7363 jiffies + 7364 IEEE80211_AUTH_TIMEOUT_SHORT; 7365 run_again(sdata, ifmgd->auth_data->timeout); 7366 } else { 7367 ifmgd->auth_data->timeout = jiffies - 1; 7368 } 7369 ifmgd->auth_data->timeout_started = true; 7370 } else if (ifmgd->assoc_data && 7371 !ifmgd->assoc_data->comeback && 7372 (ieee80211_is_assoc_req(fc) || 7373 ieee80211_is_reassoc_req(fc))) { 7374 /* 7375 * Update association timeout based on the TX status 7376 * for the (Re)Association Request frame. Skip this if 7377 * we have already processed a (Re)Association Response 7378 * frame that indicated need for association comeback 7379 * at a specific time in the future. This could happen 7380 * if the TX status information is delayed enough for 7381 * the response to be received and processed first. 7382 */ 7383 if (status_acked) { 7384 ifmgd->assoc_data->timeout = 7385 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7386 run_again(sdata, ifmgd->assoc_data->timeout); 7387 } else { 7388 ifmgd->assoc_data->timeout = jiffies - 1; 7389 } 7390 ifmgd->assoc_data->timeout_started = true; 7391 } 7392 } 7393 7394 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7395 time_after(jiffies, ifmgd->auth_data->timeout)) { 7396 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7397 /* 7398 * ok ... we waited for assoc or continuation but 7399 * userspace didn't do it, so kill the auth data 7400 */ 7401 ieee80211_destroy_auth_data(sdata, false); 7402 } else if (ieee80211_auth(sdata)) { 7403 u8 ap_addr[ETH_ALEN]; 7404 struct ieee80211_event event = { 7405 .type = MLME_EVENT, 7406 .u.mlme.data = AUTH_EVENT, 7407 .u.mlme.status = MLME_TIMEOUT, 7408 }; 7409 7410 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7411 7412 ieee80211_destroy_auth_data(sdata, false); 7413 7414 cfg80211_auth_timeout(sdata->dev, ap_addr); 7415 drv_event_callback(sdata->local, sdata, &event); 7416 } 7417 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7418 run_again(sdata, ifmgd->auth_data->timeout); 7419 7420 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7421 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7422 if ((ifmgd->assoc_data->need_beacon && 7423 !sdata->deflink.u.mgd.have_beacon) || 7424 ieee80211_do_assoc(sdata)) { 7425 struct ieee80211_event event = { 7426 .type = MLME_EVENT, 7427 .u.mlme.data = ASSOC_EVENT, 7428 .u.mlme.status = MLME_TIMEOUT, 7429 }; 7430 7431 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7432 drv_event_callback(sdata->local, sdata, &event); 7433 } 7434 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7435 run_again(sdata, ifmgd->assoc_data->timeout); 7436 7437 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7438 ifmgd->associated) { 7439 u8 *bssid = sdata->deflink.u.mgd.bssid; 7440 int max_tries; 7441 7442 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7443 max_tries = max_nullfunc_tries; 7444 else 7445 max_tries = max_probe_tries; 7446 7447 /* ACK received for nullfunc probing frame */ 7448 if (!ifmgd->probe_send_count) 7449 ieee80211_reset_ap_probe(sdata); 7450 else if (ifmgd->nullfunc_failed) { 7451 if (ifmgd->probe_send_count < max_tries) { 7452 mlme_dbg(sdata, 7453 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7454 bssid, ifmgd->probe_send_count, 7455 max_tries); 7456 ieee80211_mgd_probe_ap_send(sdata); 7457 } else { 7458 mlme_dbg(sdata, 7459 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7460 bssid); 7461 ieee80211_sta_connection_lost(sdata, 7462 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7463 false); 7464 } 7465 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7466 run_again(sdata, ifmgd->probe_timeout); 7467 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7468 mlme_dbg(sdata, 7469 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7470 bssid, probe_wait_ms); 7471 ieee80211_sta_connection_lost(sdata, 7472 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7473 } else if (ifmgd->probe_send_count < max_tries) { 7474 mlme_dbg(sdata, 7475 "No probe response from AP %pM after %dms, try %d/%i\n", 7476 bssid, probe_wait_ms, 7477 ifmgd->probe_send_count, max_tries); 7478 ieee80211_mgd_probe_ap_send(sdata); 7479 } else { 7480 /* 7481 * We actually lost the connection ... or did we? 7482 * Let's make sure! 7483 */ 7484 mlme_dbg(sdata, 7485 "No probe response from AP %pM after %dms, disconnecting.\n", 7486 bssid, probe_wait_ms); 7487 7488 ieee80211_sta_connection_lost(sdata, 7489 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7490 } 7491 } 7492 } 7493 7494 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7495 { 7496 struct ieee80211_sub_if_data *sdata = 7497 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7498 7499 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7500 return; 7501 7502 if (sdata->vif.bss_conf.csa_active && 7503 !sdata->deflink.u.mgd.csa_waiting_bcn) 7504 return; 7505 7506 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7507 return; 7508 7509 sdata->u.mgd.connection_loss = false; 7510 wiphy_work_queue(sdata->local->hw.wiphy, 7511 &sdata->u.mgd.beacon_connection_loss_work); 7512 } 7513 7514 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7515 { 7516 struct ieee80211_sub_if_data *sdata = 7517 from_timer(sdata, t, u.mgd.conn_mon_timer); 7518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7519 struct ieee80211_local *local = sdata->local; 7520 struct sta_info *sta; 7521 unsigned long timeout; 7522 7523 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7524 return; 7525 7526 if (sdata->vif.bss_conf.csa_active && 7527 !sdata->deflink.u.mgd.csa_waiting_bcn) 7528 return; 7529 7530 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7531 if (!sta) 7532 return; 7533 7534 timeout = sta->deflink.status_stats.last_ack; 7535 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7536 timeout = sta->deflink.rx_stats.last_rx; 7537 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7538 7539 /* If timeout is after now, then update timer to fire at 7540 * the later date, but do not actually probe at this time. 7541 */ 7542 if (time_is_after_jiffies(timeout)) { 7543 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7544 return; 7545 } 7546 7547 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7548 } 7549 7550 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7551 struct wiphy_work *work) 7552 { 7553 struct ieee80211_sub_if_data *sdata = 7554 container_of(work, struct ieee80211_sub_if_data, 7555 u.mgd.monitor_work); 7556 7557 ieee80211_mgd_probe_ap(sdata, false); 7558 } 7559 7560 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7561 { 7562 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7563 __ieee80211_stop_poll(sdata); 7564 7565 /* let's probe the connection once */ 7566 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7567 wiphy_work_queue(sdata->local->hw.wiphy, 7568 &sdata->u.mgd.monitor_work); 7569 } 7570 } 7571 7572 #ifdef CONFIG_PM 7573 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7574 { 7575 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7576 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7577 7578 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7579 7580 if (ifmgd->auth_data || ifmgd->assoc_data) { 7581 const u8 *ap_addr = ifmgd->auth_data ? 7582 ifmgd->auth_data->ap_addr : 7583 ifmgd->assoc_data->ap_addr; 7584 7585 /* 7586 * If we are trying to authenticate / associate while suspending, 7587 * cfg80211 won't know and won't actually abort those attempts, 7588 * thus we need to do that ourselves. 7589 */ 7590 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7591 IEEE80211_STYPE_DEAUTH, 7592 WLAN_REASON_DEAUTH_LEAVING, 7593 false, frame_buf); 7594 if (ifmgd->assoc_data) 7595 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7596 if (ifmgd->auth_data) 7597 ieee80211_destroy_auth_data(sdata, false); 7598 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7599 IEEE80211_DEAUTH_FRAME_LEN, 7600 false); 7601 } 7602 7603 /* This is a bit of a hack - we should find a better and more generic 7604 * solution to this. Normally when suspending, cfg80211 will in fact 7605 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7606 * auth (not so important) or assoc (this is the problem) process. 7607 * 7608 * As a consequence, it can happen that we are in the process of both 7609 * associating and suspending, and receive an association response 7610 * after cfg80211 has checked if it needs to disconnect, but before 7611 * we actually set the flag to drop incoming frames. This will then 7612 * cause the workqueue flush to process the association response in 7613 * the suspend, resulting in a successful association just before it 7614 * tries to remove the interface from the driver, which now though 7615 * has a channel context assigned ... this results in issues. 7616 * 7617 * To work around this (for now) simply deauth here again if we're 7618 * now connected. 7619 */ 7620 if (ifmgd->associated && !sdata->local->wowlan) { 7621 u8 bssid[ETH_ALEN]; 7622 struct cfg80211_deauth_request req = { 7623 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 7624 .bssid = bssid, 7625 }; 7626 7627 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7628 ieee80211_mgd_deauth(sdata, &req); 7629 } 7630 } 7631 #endif 7632 7633 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 7634 { 7635 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7636 7637 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7638 7639 if (!ifmgd->associated) 7640 return; 7641 7642 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 7643 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 7644 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 7645 ieee80211_sta_connection_lost(sdata, 7646 WLAN_REASON_UNSPECIFIED, 7647 true); 7648 return; 7649 } 7650 7651 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 7652 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 7653 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 7654 ieee80211_sta_connection_lost(sdata, 7655 WLAN_REASON_UNSPECIFIED, 7656 true); 7657 return; 7658 } 7659 } 7660 7661 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 7662 struct wiphy_work *work) 7663 { 7664 struct ieee80211_link_data *link = 7665 container_of(work, struct ieee80211_link_data, 7666 u.mgd.request_smps_work); 7667 7668 __ieee80211_request_smps_mgd(link->sdata, link, 7669 link->u.mgd.driver_smps_mode); 7670 } 7671 7672 /* interface setup */ 7673 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 7674 { 7675 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7676 7677 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 7678 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 7679 ieee80211_beacon_connection_loss_work); 7680 wiphy_work_init(&ifmgd->csa_connection_drop_work, 7681 ieee80211_csa_connection_drop_work); 7682 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 7683 ieee80211_tdls_peer_del_work); 7684 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 7685 ieee80211_ml_reconf_work); 7686 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 7687 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 7688 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 7689 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 7690 ieee80211_sta_handle_tspec_ac_params_wk); 7691 wiphy_delayed_work_init(&ifmgd->ttlm_work, 7692 ieee80211_tid_to_link_map_work); 7693 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 7694 ieee80211_neg_ttlm_timeout_work); 7695 wiphy_work_init(&ifmgd->teardown_ttlm_work, 7696 ieee80211_teardown_ttlm_work); 7697 7698 ifmgd->flags = 0; 7699 ifmgd->powersave = sdata->wdev.ps; 7700 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 7701 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 7702 /* Setup TDLS data */ 7703 spin_lock_init(&ifmgd->teardown_lock); 7704 ifmgd->teardown_skb = NULL; 7705 ifmgd->orig_teardown_skb = NULL; 7706 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 7707 } 7708 7709 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 7710 struct wiphy_work *work) 7711 { 7712 struct ieee80211_link_data *link = 7713 container_of(work, struct ieee80211_link_data, 7714 u.mgd.recalc_smps); 7715 7716 ieee80211_recalc_smps(link->sdata, link); 7717 } 7718 7719 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 7720 { 7721 struct ieee80211_sub_if_data *sdata = link->sdata; 7722 struct ieee80211_local *local = sdata->local; 7723 unsigned int link_id = link->link_id; 7724 7725 link->u.mgd.p2p_noa_index = -1; 7726 link->conf->bssid = link->u.mgd.bssid; 7727 link->smps_mode = IEEE80211_SMPS_OFF; 7728 7729 wiphy_work_init(&link->u.mgd.request_smps_work, 7730 ieee80211_request_smps_mgd_work); 7731 wiphy_work_init(&link->u.mgd.recalc_smps, 7732 ieee80211_recalc_smps_work); 7733 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 7734 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 7735 else 7736 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 7737 7738 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 7739 ieee80211_chswitch_work); 7740 7741 ieee80211_clear_tpe(&link->conf->tpe); 7742 7743 if (sdata->u.mgd.assoc_data) 7744 ether_addr_copy(link->conf->addr, 7745 sdata->u.mgd.assoc_data->link[link_id].addr); 7746 else if (!is_valid_ether_addr(link->conf->addr)) 7747 eth_random_addr(link->conf->addr); 7748 } 7749 7750 /* scan finished notification */ 7751 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 7752 { 7753 struct ieee80211_sub_if_data *sdata; 7754 7755 /* Restart STA timers */ 7756 rcu_read_lock(); 7757 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 7758 if (ieee80211_sdata_running(sdata)) 7759 ieee80211_restart_sta_timer(sdata); 7760 } 7761 rcu_read_unlock(); 7762 } 7763 7764 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 7765 struct cfg80211_bss *cbss, s8 link_id, 7766 const u8 *ap_mld_addr, bool assoc, 7767 struct ieee80211_conn_settings *conn, 7768 bool override) 7769 { 7770 struct ieee80211_local *local = sdata->local; 7771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7772 struct ieee80211_bss *bss = (void *)cbss->priv; 7773 struct sta_info *new_sta = NULL; 7774 struct ieee80211_link_data *link; 7775 bool have_sta = false; 7776 bool mlo; 7777 int err; 7778 7779 if (link_id >= 0) { 7780 mlo = true; 7781 if (WARN_ON(!ap_mld_addr)) 7782 return -EINVAL; 7783 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 7784 } else { 7785 if (WARN_ON(ap_mld_addr)) 7786 return -EINVAL; 7787 ap_mld_addr = cbss->bssid; 7788 err = ieee80211_vif_set_links(sdata, 0, 0); 7789 link_id = 0; 7790 mlo = false; 7791 } 7792 7793 if (err) 7794 return err; 7795 7796 link = sdata_dereference(sdata->link[link_id], sdata); 7797 if (WARN_ON(!link)) { 7798 err = -ENOLINK; 7799 goto out_err; 7800 } 7801 7802 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 7803 err = -EINVAL; 7804 goto out_err; 7805 } 7806 7807 /* If a reconfig is happening, bail out */ 7808 if (local->in_reconfig) { 7809 err = -EBUSY; 7810 goto out_err; 7811 } 7812 7813 if (assoc) { 7814 rcu_read_lock(); 7815 have_sta = sta_info_get(sdata, ap_mld_addr); 7816 rcu_read_unlock(); 7817 } 7818 7819 if (!have_sta) { 7820 if (mlo) 7821 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 7822 link_id, cbss->bssid, 7823 GFP_KERNEL); 7824 else 7825 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 7826 7827 if (!new_sta) { 7828 err = -ENOMEM; 7829 goto out_err; 7830 } 7831 7832 new_sta->sta.mlo = mlo; 7833 } 7834 7835 /* 7836 * Set up the information for the new channel before setting the 7837 * new channel. We can't - completely race-free - change the basic 7838 * rates bitmap and the channel (sband) that it refers to, but if 7839 * we set it up before we at least avoid calling into the driver's 7840 * bss_info_changed() method with invalid information (since we do 7841 * call that from changing the channel - only for IDLE and perhaps 7842 * some others, but ...). 7843 * 7844 * So to avoid that, just set up all the new information before the 7845 * channel, but tell the driver to apply it only afterwards, since 7846 * it might need the new channel for that. 7847 */ 7848 if (new_sta) { 7849 const struct cfg80211_bss_ies *ies; 7850 struct link_sta_info *link_sta; 7851 7852 rcu_read_lock(); 7853 link_sta = rcu_dereference(new_sta->link[link_id]); 7854 if (WARN_ON(!link_sta)) { 7855 rcu_read_unlock(); 7856 sta_info_free(local, new_sta); 7857 err = -EINVAL; 7858 goto out_err; 7859 } 7860 7861 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7862 link_sta, cbss); 7863 if (err) { 7864 rcu_read_unlock(); 7865 sta_info_free(local, new_sta); 7866 goto out_err; 7867 } 7868 7869 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7870 7871 /* set timing information */ 7872 link->conf->beacon_int = cbss->beacon_interval; 7873 ies = rcu_dereference(cbss->beacon_ies); 7874 if (ies) { 7875 link->conf->sync_tsf = ies->tsf; 7876 link->conf->sync_device_ts = 7877 bss->device_ts_beacon; 7878 7879 ieee80211_get_dtim(ies, 7880 &link->conf->sync_dtim_count, 7881 NULL); 7882 } else if (!ieee80211_hw_check(&sdata->local->hw, 7883 TIMING_BEACON_ONLY)) { 7884 ies = rcu_dereference(cbss->proberesp_ies); 7885 /* must be non-NULL since beacon IEs were NULL */ 7886 link->conf->sync_tsf = ies->tsf; 7887 link->conf->sync_device_ts = 7888 bss->device_ts_presp; 7889 link->conf->sync_dtim_count = 0; 7890 } else { 7891 link->conf->sync_tsf = 0; 7892 link->conf->sync_device_ts = 0; 7893 link->conf->sync_dtim_count = 0; 7894 } 7895 rcu_read_unlock(); 7896 } 7897 7898 if (new_sta || override) { 7899 /* 7900 * Only set this if we're also going to calculate the AP 7901 * settings etc., otherwise this was set before in a 7902 * previous call. Note override is set to %true in assoc 7903 * if the settings were changed. 7904 */ 7905 link->u.mgd.conn = *conn; 7906 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 7907 mlo, &link->u.mgd.conn); 7908 if (err) { 7909 if (new_sta) 7910 sta_info_free(local, new_sta); 7911 goto out_err; 7912 } 7913 /* pass out for use in assoc */ 7914 *conn = link->u.mgd.conn; 7915 } 7916 7917 if (new_sta) { 7918 /* 7919 * tell driver about BSSID, basic rates and timing 7920 * this was set up above, before setting the channel 7921 */ 7922 ieee80211_link_info_change_notify(sdata, link, 7923 BSS_CHANGED_BSSID | 7924 BSS_CHANGED_BASIC_RATES | 7925 BSS_CHANGED_BEACON_INT); 7926 7927 if (assoc) 7928 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7929 7930 err = sta_info_insert(new_sta); 7931 new_sta = NULL; 7932 if (err) { 7933 sdata_info(sdata, 7934 "failed to insert STA entry for the AP (error %d)\n", 7935 err); 7936 goto out_release_chan; 7937 } 7938 } else 7939 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7940 7941 /* Cancel scan to ensure that nothing interferes with connection */ 7942 if (local->scanning) 7943 ieee80211_scan_cancel(local); 7944 7945 return 0; 7946 7947 out_release_chan: 7948 ieee80211_link_release_channel(link); 7949 out_err: 7950 ieee80211_vif_set_links(sdata, 0, 0); 7951 return err; 7952 } 7953 7954 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 7955 const struct cfg80211_bss_ies *ies, 7956 u8 cur_channel, bool ignore_ecsa) 7957 { 7958 const struct element *csa_elem, *ecsa_elem; 7959 struct ieee80211_channel_sw_ie *csa = NULL; 7960 struct ieee80211_ext_chansw_ie *ecsa = NULL; 7961 7962 if (!ies) 7963 return false; 7964 7965 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 7966 ies->data, ies->len); 7967 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 7968 csa = (void *)csa_elem->data; 7969 7970 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 7971 ies->data, ies->len); 7972 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 7973 ecsa = (void *)ecsa_elem->data; 7974 7975 if (csa && csa->count == 0) 7976 csa = NULL; 7977 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 7978 csa = NULL; 7979 7980 if (ecsa && ecsa->count == 0) 7981 ecsa = NULL; 7982 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 7983 ecsa = NULL; 7984 7985 if (ignore_ecsa && ecsa) { 7986 sdata_info(sdata, 7987 "Ignoring ECSA in probe response - was considered stuck!\n"); 7988 return csa; 7989 } 7990 7991 return csa || ecsa; 7992 } 7993 7994 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 7995 struct cfg80211_bss *bss) 7996 { 7997 u8 cur_channel; 7998 bool ret; 7999 8000 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8001 8002 rcu_read_lock(); 8003 if (ieee80211_mgd_csa_present(sdata, 8004 rcu_dereference(bss->beacon_ies), 8005 cur_channel, false)) { 8006 ret = true; 8007 goto out; 8008 } 8009 8010 if (ieee80211_mgd_csa_present(sdata, 8011 rcu_dereference(bss->proberesp_ies), 8012 cur_channel, bss->proberesp_ecsa_stuck)) { 8013 ret = true; 8014 goto out; 8015 } 8016 8017 ret = false; 8018 out: 8019 rcu_read_unlock(); 8020 return ret; 8021 } 8022 8023 /* config hooks */ 8024 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8025 struct cfg80211_auth_request *req) 8026 { 8027 struct ieee80211_local *local = sdata->local; 8028 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8029 struct ieee80211_mgd_auth_data *auth_data; 8030 struct ieee80211_conn_settings conn; 8031 struct ieee80211_link_data *link; 8032 struct ieee80211_supported_band *sband; 8033 struct ieee80211_bss *bss; 8034 u16 auth_alg; 8035 int err; 8036 bool cont_auth, wmm_used; 8037 8038 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8039 8040 /* prepare auth data structure */ 8041 8042 switch (req->auth_type) { 8043 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8044 auth_alg = WLAN_AUTH_OPEN; 8045 break; 8046 case NL80211_AUTHTYPE_SHARED_KEY: 8047 if (fips_enabled) 8048 return -EOPNOTSUPP; 8049 auth_alg = WLAN_AUTH_SHARED_KEY; 8050 break; 8051 case NL80211_AUTHTYPE_FT: 8052 auth_alg = WLAN_AUTH_FT; 8053 break; 8054 case NL80211_AUTHTYPE_NETWORK_EAP: 8055 auth_alg = WLAN_AUTH_LEAP; 8056 break; 8057 case NL80211_AUTHTYPE_SAE: 8058 auth_alg = WLAN_AUTH_SAE; 8059 break; 8060 case NL80211_AUTHTYPE_FILS_SK: 8061 auth_alg = WLAN_AUTH_FILS_SK; 8062 break; 8063 case NL80211_AUTHTYPE_FILS_SK_PFS: 8064 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8065 break; 8066 case NL80211_AUTHTYPE_FILS_PK: 8067 auth_alg = WLAN_AUTH_FILS_PK; 8068 break; 8069 default: 8070 return -EOPNOTSUPP; 8071 } 8072 8073 if (ifmgd->assoc_data) 8074 return -EBUSY; 8075 8076 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8077 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8078 return -EINVAL; 8079 } 8080 8081 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8082 req->ie_len, GFP_KERNEL); 8083 if (!auth_data) 8084 return -ENOMEM; 8085 8086 memcpy(auth_data->ap_addr, 8087 req->ap_mld_addr ?: req->bss->bssid, 8088 ETH_ALEN); 8089 auth_data->bss = req->bss; 8090 auth_data->link_id = req->link_id; 8091 8092 if (req->auth_data_len >= 4) { 8093 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8094 __le16 *pos = (__le16 *) req->auth_data; 8095 8096 auth_data->sae_trans = le16_to_cpu(pos[0]); 8097 auth_data->sae_status = le16_to_cpu(pos[1]); 8098 } 8099 memcpy(auth_data->data, req->auth_data + 4, 8100 req->auth_data_len - 4); 8101 auth_data->data_len += req->auth_data_len - 4; 8102 } 8103 8104 /* Check if continuing authentication or trying to authenticate with the 8105 * same BSS that we were in the process of authenticating with and avoid 8106 * removal and re-addition of the STA entry in 8107 * ieee80211_prep_connection(). 8108 */ 8109 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8110 ifmgd->auth_data->link_id == req->link_id; 8111 8112 if (req->ie && req->ie_len) { 8113 memcpy(&auth_data->data[auth_data->data_len], 8114 req->ie, req->ie_len); 8115 auth_data->data_len += req->ie_len; 8116 } 8117 8118 if (req->key && req->key_len) { 8119 auth_data->key_len = req->key_len; 8120 auth_data->key_idx = req->key_idx; 8121 memcpy(auth_data->key, req->key, req->key_len); 8122 } 8123 8124 auth_data->algorithm = auth_alg; 8125 8126 /* try to authenticate/probe */ 8127 8128 if (ifmgd->auth_data) { 8129 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8130 auth_data->peer_confirmed = 8131 ifmgd->auth_data->peer_confirmed; 8132 } 8133 ieee80211_destroy_auth_data(sdata, cont_auth); 8134 } 8135 8136 /* prep auth_data so we don't go into idle on disassoc */ 8137 ifmgd->auth_data = auth_data; 8138 8139 /* If this is continuation of an ongoing SAE authentication exchange 8140 * (i.e., request to send SAE Confirm) and the peer has already 8141 * confirmed, mark authentication completed since we are about to send 8142 * out SAE Confirm. 8143 */ 8144 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8145 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8146 ieee80211_mark_sta_auth(sdata); 8147 8148 if (ifmgd->associated) { 8149 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8150 8151 sdata_info(sdata, 8152 "disconnect from AP %pM for new auth to %pM\n", 8153 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8154 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8155 WLAN_REASON_UNSPECIFIED, 8156 false, frame_buf); 8157 8158 ieee80211_report_disconnect(sdata, frame_buf, 8159 sizeof(frame_buf), true, 8160 WLAN_REASON_UNSPECIFIED, 8161 false); 8162 } 8163 8164 /* needed for transmitting the auth frame(s) properly */ 8165 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8166 8167 bss = (void *)req->bss->priv; 8168 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8169 8170 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8171 8172 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8173 &conn); 8174 8175 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8176 req->ap_mld_addr, cont_auth, 8177 &conn, false); 8178 if (err) 8179 goto err_clear; 8180 8181 if (req->link_id >= 0) 8182 link = sdata_dereference(sdata->link[req->link_id], sdata); 8183 else 8184 link = &sdata->deflink; 8185 8186 if (WARN_ON(!link)) { 8187 err = -ENOLINK; 8188 goto err_clear; 8189 } 8190 8191 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8192 auth_data->ap_addr, link->conf->addr); 8193 8194 err = ieee80211_auth(sdata); 8195 if (err) { 8196 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8197 goto err_clear; 8198 } 8199 8200 /* hold our own reference */ 8201 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8202 return 0; 8203 8204 err_clear: 8205 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8206 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8207 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8208 BSS_CHANGED_BSSID); 8209 ieee80211_link_release_channel(&sdata->deflink); 8210 } 8211 ifmgd->auth_data = NULL; 8212 kfree(auth_data); 8213 return err; 8214 } 8215 8216 static void 8217 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8218 struct ieee80211_mgd_assoc_data *assoc_data, 8219 struct cfg80211_assoc_request *req, 8220 struct ieee80211_conn_settings *conn, 8221 unsigned int link_id) 8222 { 8223 struct ieee80211_local *local = sdata->local; 8224 const struct cfg80211_bss_ies *bss_ies; 8225 struct ieee80211_supported_band *sband; 8226 struct ieee80211_link_data *link; 8227 struct cfg80211_bss *cbss; 8228 struct ieee80211_bss *bss; 8229 8230 cbss = assoc_data->link[link_id].bss; 8231 if (WARN_ON(!cbss)) 8232 return; 8233 8234 bss = (void *)cbss->priv; 8235 8236 sband = local->hw.wiphy->bands[cbss->channel->band]; 8237 if (WARN_ON(!sband)) 8238 return; 8239 8240 link = sdata_dereference(sdata->link[link_id], sdata); 8241 if (WARN_ON(!link)) 8242 return; 8243 8244 /* for MLO connections assume advertising all rates is OK */ 8245 if (!req->ap_mld_addr) { 8246 assoc_data->supp_rates = bss->supp_rates; 8247 assoc_data->supp_rates_len = bss->supp_rates_len; 8248 } 8249 8250 /* copy and link elems for the STA profile */ 8251 if (req->links[link_id].elems_len) { 8252 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8253 req->links[link_id].elems_len); 8254 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8255 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8256 assoc_data->ie_pos += req->links[link_id].elems_len; 8257 } 8258 8259 link->u.mgd.beacon_crc_valid = false; 8260 link->u.mgd.dtim_period = 0; 8261 link->u.mgd.have_beacon = false; 8262 8263 /* override HT configuration only if the AP and we support it */ 8264 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8265 struct ieee80211_sta_ht_cap sta_ht_cap; 8266 8267 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8268 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8269 } 8270 8271 rcu_read_lock(); 8272 bss_ies = rcu_dereference(cbss->beacon_ies); 8273 if (bss_ies) { 8274 u8 dtim_count = 0; 8275 8276 ieee80211_get_dtim(bss_ies, &dtim_count, 8277 &link->u.mgd.dtim_period); 8278 8279 sdata->deflink.u.mgd.have_beacon = true; 8280 8281 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8282 link->conf->sync_tsf = bss_ies->tsf; 8283 link->conf->sync_device_ts = bss->device_ts_beacon; 8284 link->conf->sync_dtim_count = dtim_count; 8285 } 8286 } else { 8287 bss_ies = rcu_dereference(cbss->ies); 8288 } 8289 8290 if (bss_ies) { 8291 const struct element *elem; 8292 8293 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8294 bss_ies->data, bss_ies->len); 8295 if (elem && elem->datalen >= 3) 8296 link->conf->profile_periodicity = elem->data[2]; 8297 else 8298 link->conf->profile_periodicity = 0; 8299 8300 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8301 bss_ies->data, bss_ies->len); 8302 if (elem && elem->datalen >= 11 && 8303 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8304 link->conf->ema_ap = true; 8305 else 8306 link->conf->ema_ap = false; 8307 } 8308 rcu_read_unlock(); 8309 8310 if (bss->corrupt_data) { 8311 char *corrupt_type = "data"; 8312 8313 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8314 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8315 corrupt_type = "beacon and probe response"; 8316 else 8317 corrupt_type = "beacon"; 8318 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8319 corrupt_type = "probe response"; 8320 } 8321 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8322 cbss->bssid, corrupt_type); 8323 } 8324 8325 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8326 if (sdata->u.mgd.powersave) 8327 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8328 else 8329 link->smps_mode = IEEE80211_SMPS_OFF; 8330 } else { 8331 link->smps_mode = link->u.mgd.req_smps; 8332 } 8333 } 8334 8335 static int 8336 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8337 struct ieee80211_mgd_assoc_data *assoc_data, 8338 int link_id) 8339 { 8340 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8341 enum nl80211_band band = cbss->channel->band; 8342 struct ieee80211_supported_band *sband; 8343 const struct element *elem; 8344 int err; 8345 8346 /* neither HT nor VHT elements used on 6 GHz */ 8347 if (band == NL80211_BAND_6GHZ) 8348 return 0; 8349 8350 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8351 return 0; 8352 8353 rcu_read_lock(); 8354 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8355 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8356 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8357 cbss->bssid); 8358 err = -EINVAL; 8359 goto out_rcu; 8360 } 8361 assoc_data->link[link_id].ap_ht_param = 8362 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8363 rcu_read_unlock(); 8364 8365 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8366 return 0; 8367 8368 /* some drivers want to support VHT on 2.4 GHz even */ 8369 sband = sdata->local->hw.wiphy->bands[band]; 8370 if (!sband->vht_cap.vht_supported) 8371 return 0; 8372 8373 rcu_read_lock(); 8374 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8375 /* but even then accept it not being present on the AP */ 8376 if (!elem && band == NL80211_BAND_2GHZ) { 8377 err = 0; 8378 goto out_rcu; 8379 } 8380 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8381 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8382 cbss->bssid); 8383 err = -EINVAL; 8384 goto out_rcu; 8385 } 8386 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8387 sizeof(struct ieee80211_vht_cap)); 8388 rcu_read_unlock(); 8389 8390 return 0; 8391 out_rcu: 8392 rcu_read_unlock(); 8393 return err; 8394 } 8395 8396 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8397 struct cfg80211_assoc_request *req) 8398 { 8399 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8400 struct ieee80211_local *local = sdata->local; 8401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8402 struct ieee80211_mgd_assoc_data *assoc_data; 8403 const struct element *ssid_elem; 8404 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8405 struct ieee80211_link_data *link; 8406 struct cfg80211_bss *cbss; 8407 bool override, uapsd_supported; 8408 bool match_auth; 8409 int i, err; 8410 size_t size = sizeof(*assoc_data) + req->ie_len; 8411 8412 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8413 size += req->links[i].elems_len; 8414 8415 /* FIXME: no support for 4-addr MLO yet */ 8416 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8417 return -EOPNOTSUPP; 8418 8419 assoc_data = kzalloc(size, GFP_KERNEL); 8420 if (!assoc_data) 8421 return -ENOMEM; 8422 8423 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8424 8425 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8426 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8427 err = -EINVAL; 8428 goto err_free; 8429 } 8430 8431 rcu_read_lock(); 8432 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8433 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8434 rcu_read_unlock(); 8435 err = -EINVAL; 8436 goto err_free; 8437 } 8438 8439 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8440 assoc_data->ssid_len = ssid_elem->datalen; 8441 rcu_read_unlock(); 8442 8443 if (req->ap_mld_addr) 8444 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8445 else 8446 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8447 8448 if (ifmgd->associated) { 8449 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8450 8451 sdata_info(sdata, 8452 "disconnect from AP %pM for new assoc to %pM\n", 8453 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8454 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8455 WLAN_REASON_UNSPECIFIED, 8456 false, frame_buf); 8457 8458 ieee80211_report_disconnect(sdata, frame_buf, 8459 sizeof(frame_buf), true, 8460 WLAN_REASON_UNSPECIFIED, 8461 false); 8462 } 8463 8464 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8465 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8466 sizeof(ifmgd->ht_capa_mask)); 8467 8468 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8469 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8470 sizeof(ifmgd->vht_capa_mask)); 8471 8472 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8473 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8474 sizeof(ifmgd->s1g_capa_mask)); 8475 8476 /* keep some setup (AP STA, channel, ...) if matching */ 8477 match_auth = ifmgd->auth_data && 8478 ether_addr_equal(ifmgd->auth_data->ap_addr, 8479 assoc_data->ap_addr) && 8480 ifmgd->auth_data->link_id == req->link_id; 8481 8482 if (req->ap_mld_addr) { 8483 uapsd_supported = true; 8484 8485 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8486 ASSOC_REQ_DISABLE_VHT | 8487 ASSOC_REQ_DISABLE_HE | 8488 ASSOC_REQ_DISABLE_EHT)) { 8489 err = -EINVAL; 8490 goto err_free; 8491 } 8492 8493 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8494 struct ieee80211_supported_band *sband; 8495 struct cfg80211_bss *link_cbss = req->links[i].bss; 8496 struct ieee80211_bss *bss; 8497 8498 if (!link_cbss) 8499 continue; 8500 8501 bss = (void *)link_cbss->priv; 8502 8503 if (!bss->wmm_used) { 8504 err = -EINVAL; 8505 req->links[i].error = err; 8506 goto err_free; 8507 } 8508 8509 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8510 err = -EINVAL; 8511 req->links[i].error = err; 8512 goto err_free; 8513 } 8514 8515 link = sdata_dereference(sdata->link[i], sdata); 8516 if (link) 8517 ether_addr_copy(assoc_data->link[i].addr, 8518 link->conf->addr); 8519 else 8520 eth_random_addr(assoc_data->link[i].addr); 8521 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8522 8523 if (match_auth && i == assoc_link_id && link) 8524 assoc_data->link[i].conn = link->u.mgd.conn; 8525 else 8526 assoc_data->link[i].conn = 8527 ieee80211_conn_settings_unlimited; 8528 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8529 req, true, i, 8530 &assoc_data->link[i].conn); 8531 assoc_data->link[i].bss = link_cbss; 8532 assoc_data->link[i].disabled = req->links[i].disabled; 8533 8534 if (!bss->uapsd_supported) 8535 uapsd_supported = false; 8536 8537 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 8538 err = -EINVAL; 8539 req->links[i].error = err; 8540 goto err_free; 8541 } 8542 8543 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 8544 assoc_data, i); 8545 if (err) { 8546 err = -EINVAL; 8547 req->links[i].error = err; 8548 goto err_free; 8549 } 8550 } 8551 8552 assoc_data->wmm = true; 8553 } else { 8554 struct ieee80211_supported_band *sband; 8555 struct ieee80211_bss *bss = (void *)cbss->priv; 8556 8557 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8558 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8559 8560 assoc_data->wmm = bss->wmm_used && 8561 (local->hw.queues >= IEEE80211_NUM_ACS); 8562 8563 if (cbss->channel->band == NL80211_BAND_6GHZ && 8564 req->flags & (ASSOC_REQ_DISABLE_HT | 8565 ASSOC_REQ_DISABLE_VHT | 8566 ASSOC_REQ_DISABLE_HE)) { 8567 err = -EINVAL; 8568 goto err_free; 8569 } 8570 8571 sband = local->hw.wiphy->bands[cbss->channel->band]; 8572 8573 assoc_data->link[0].bss = cbss; 8574 8575 if (match_auth) 8576 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 8577 else 8578 assoc_data->link[0].conn = 8579 ieee80211_conn_settings_unlimited; 8580 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 8581 assoc_data->wmm, 0, 8582 &assoc_data->link[0].conn); 8583 8584 uapsd_supported = bss->uapsd_supported; 8585 8586 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 8587 if (err) 8588 goto err_free; 8589 } 8590 8591 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8592 8593 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8594 err = -EBUSY; 8595 goto err_free; 8596 } 8597 8598 if (ifmgd->assoc_data) { 8599 err = -EBUSY; 8600 goto err_free; 8601 } 8602 8603 /* Cleanup is delayed if auth_data matches */ 8604 if (ifmgd->auth_data && !match_auth) 8605 ieee80211_destroy_auth_data(sdata, false); 8606 8607 if (req->ie && req->ie_len) { 8608 memcpy(assoc_data->ie, req->ie, req->ie_len); 8609 assoc_data->ie_len = req->ie_len; 8610 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 8611 } else { 8612 assoc_data->ie_pos = assoc_data->ie; 8613 } 8614 8615 if (req->fils_kek) { 8616 /* should already be checked in cfg80211 - so warn */ 8617 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 8618 err = -EINVAL; 8619 goto err_free; 8620 } 8621 memcpy(assoc_data->fils_kek, req->fils_kek, 8622 req->fils_kek_len); 8623 assoc_data->fils_kek_len = req->fils_kek_len; 8624 } 8625 8626 if (req->fils_nonces) 8627 memcpy(assoc_data->fils_nonces, req->fils_nonces, 8628 2 * FILS_NONCE_LEN); 8629 8630 /* default timeout */ 8631 assoc_data->timeout = jiffies; 8632 assoc_data->timeout_started = true; 8633 8634 assoc_data->assoc_link_id = assoc_link_id; 8635 8636 if (req->ap_mld_addr) { 8637 /* if there was no authentication, set up the link */ 8638 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 8639 if (err) 8640 goto err_clear; 8641 } 8642 8643 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 8644 if (WARN_ON(!link)) { 8645 err = -EINVAL; 8646 goto err_clear; 8647 } 8648 8649 override = link->u.mgd.conn.mode != 8650 assoc_data->link[assoc_link_id].conn.mode || 8651 link->u.mgd.conn.bw_limit != 8652 assoc_data->link[assoc_link_id].conn.bw_limit; 8653 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 8654 8655 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 8656 assoc_link_id); 8657 8658 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 8659 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 8660 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 8661 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 8662 8663 if (assoc_data->wmm && uapsd_supported && 8664 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 8665 assoc_data->uapsd = true; 8666 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 8667 } else { 8668 assoc_data->uapsd = false; 8669 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 8670 } 8671 8672 if (req->prev_bssid) 8673 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 8674 8675 if (req->use_mfp) { 8676 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 8677 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 8678 } else { 8679 ifmgd->mfp = IEEE80211_MFP_DISABLED; 8680 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 8681 } 8682 8683 if (req->flags & ASSOC_REQ_USE_RRM) 8684 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 8685 else 8686 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 8687 8688 if (req->crypto.control_port) 8689 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 8690 else 8691 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 8692 8693 sdata->control_port_protocol = req->crypto.control_port_ethertype; 8694 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 8695 sdata->control_port_over_nl80211 = 8696 req->crypto.control_port_over_nl80211; 8697 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 8698 8699 /* kick off associate process */ 8700 ifmgd->assoc_data = assoc_data; 8701 8702 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 8703 if (!assoc_data->link[i].bss) 8704 continue; 8705 if (i == assoc_data->assoc_link_id) 8706 continue; 8707 /* only calculate the mode, hence link == NULL */ 8708 err = ieee80211_prep_channel(sdata, NULL, i, 8709 assoc_data->link[i].bss, true, 8710 &assoc_data->link[i].conn); 8711 if (err) { 8712 req->links[i].error = err; 8713 goto err_clear; 8714 } 8715 } 8716 8717 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 8718 vif_cfg->ssid_len = assoc_data->ssid_len; 8719 8720 /* needed for transmitting the assoc frames properly */ 8721 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 8722 8723 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 8724 req->ap_mld_addr, true, 8725 &assoc_data->link[assoc_link_id].conn, 8726 override); 8727 if (err) 8728 goto err_clear; 8729 8730 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 8731 const struct cfg80211_bss_ies *beacon_ies; 8732 8733 rcu_read_lock(); 8734 beacon_ies = rcu_dereference(req->bss->beacon_ies); 8735 if (!beacon_ies) { 8736 /* 8737 * Wait up to one beacon interval ... 8738 * should this be more if we miss one? 8739 */ 8740 sdata_info(sdata, "waiting for beacon from %pM\n", 8741 link->u.mgd.bssid); 8742 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 8743 assoc_data->timeout_started = true; 8744 assoc_data->need_beacon = true; 8745 } 8746 rcu_read_unlock(); 8747 } 8748 8749 run_again(sdata, assoc_data->timeout); 8750 8751 /* We are associating, clean up auth_data */ 8752 if (ifmgd->auth_data) 8753 ieee80211_destroy_auth_data(sdata, true); 8754 8755 return 0; 8756 err_clear: 8757 if (!ifmgd->auth_data) { 8758 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8759 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8760 BSS_CHANGED_BSSID); 8761 } 8762 ifmgd->assoc_data = NULL; 8763 err_free: 8764 kfree(assoc_data); 8765 return err; 8766 } 8767 8768 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 8769 struct cfg80211_deauth_request *req) 8770 { 8771 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8772 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8773 bool tx = !req->local_state_change; 8774 struct ieee80211_prep_tx_info info = { 8775 .subtype = IEEE80211_STYPE_DEAUTH, 8776 }; 8777 8778 if (ifmgd->auth_data && 8779 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 8780 sdata_info(sdata, 8781 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 8782 req->bssid, req->reason_code, 8783 ieee80211_get_reason_code_string(req->reason_code)); 8784 8785 info.link_id = ifmgd->auth_data->link_id; 8786 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8787 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8788 IEEE80211_STYPE_DEAUTH, 8789 req->reason_code, tx, 8790 frame_buf); 8791 ieee80211_destroy_auth_data(sdata, false); 8792 ieee80211_report_disconnect(sdata, frame_buf, 8793 sizeof(frame_buf), true, 8794 req->reason_code, false); 8795 drv_mgd_complete_tx(sdata->local, sdata, &info); 8796 return 0; 8797 } 8798 8799 if (ifmgd->assoc_data && 8800 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 8801 sdata_info(sdata, 8802 "aborting association with %pM by local choice (Reason: %u=%s)\n", 8803 req->bssid, req->reason_code, 8804 ieee80211_get_reason_code_string(req->reason_code)); 8805 8806 info.link_id = ifmgd->assoc_data->assoc_link_id; 8807 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8808 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8809 IEEE80211_STYPE_DEAUTH, 8810 req->reason_code, tx, 8811 frame_buf); 8812 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8813 ieee80211_report_disconnect(sdata, frame_buf, 8814 sizeof(frame_buf), true, 8815 req->reason_code, false); 8816 drv_mgd_complete_tx(sdata->local, sdata, &info); 8817 return 0; 8818 } 8819 8820 if (ifmgd->associated && 8821 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 8822 sdata_info(sdata, 8823 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 8824 req->bssid, req->reason_code, 8825 ieee80211_get_reason_code_string(req->reason_code)); 8826 8827 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8828 req->reason_code, tx, frame_buf); 8829 ieee80211_report_disconnect(sdata, frame_buf, 8830 sizeof(frame_buf), true, 8831 req->reason_code, false); 8832 drv_mgd_complete_tx(sdata->local, sdata, &info); 8833 return 0; 8834 } 8835 8836 return -ENOTCONN; 8837 } 8838 8839 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 8840 struct cfg80211_disassoc_request *req) 8841 { 8842 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8843 8844 if (!sdata->u.mgd.associated || 8845 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 8846 return -ENOTCONN; 8847 8848 sdata_info(sdata, 8849 "disassociating from %pM by local choice (Reason: %u=%s)\n", 8850 req->ap_addr, req->reason_code, 8851 ieee80211_get_reason_code_string(req->reason_code)); 8852 8853 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 8854 req->reason_code, !req->local_state_change, 8855 frame_buf); 8856 8857 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8858 req->reason_code, false); 8859 8860 return 0; 8861 } 8862 8863 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 8864 { 8865 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8866 &link->u.mgd.request_smps_work); 8867 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8868 &link->u.mgd.recalc_smps); 8869 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 8870 &link->u.mgd.chswitch_work); 8871 } 8872 8873 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 8874 { 8875 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8876 8877 /* 8878 * Make sure some work items will not run after this, 8879 * they will not do anything but might not have been 8880 * cancelled when disconnecting. 8881 */ 8882 wiphy_work_cancel(sdata->local->hw.wiphy, 8883 &ifmgd->monitor_work); 8884 wiphy_work_cancel(sdata->local->hw.wiphy, 8885 &ifmgd->beacon_connection_loss_work); 8886 wiphy_work_cancel(sdata->local->hw.wiphy, 8887 &ifmgd->csa_connection_drop_work); 8888 wiphy_work_cancel(sdata->local->hw.wiphy, 8889 &ifmgd->teardown_ttlm_work); 8890 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8891 &ifmgd->tdls_peer_del_work); 8892 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8893 &ifmgd->ml_reconf_work); 8894 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 8895 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8896 &ifmgd->neg_ttlm_timeout_work); 8897 8898 if (ifmgd->assoc_data) 8899 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8900 if (ifmgd->auth_data) 8901 ieee80211_destroy_auth_data(sdata, false); 8902 spin_lock_bh(&ifmgd->teardown_lock); 8903 if (ifmgd->teardown_skb) { 8904 kfree_skb(ifmgd->teardown_skb); 8905 ifmgd->teardown_skb = NULL; 8906 ifmgd->orig_teardown_skb = NULL; 8907 } 8908 kfree(ifmgd->assoc_req_ies); 8909 ifmgd->assoc_req_ies = NULL; 8910 ifmgd->assoc_req_ies_len = 0; 8911 spin_unlock_bh(&ifmgd->teardown_lock); 8912 del_timer_sync(&ifmgd->timer); 8913 } 8914 8915 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 8916 enum nl80211_cqm_rssi_threshold_event rssi_event, 8917 s32 rssi_level, 8918 gfp_t gfp) 8919 { 8920 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8921 8922 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 8923 8924 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 8925 } 8926 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 8927 8928 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 8929 { 8930 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8931 8932 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 8933 8934 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 8935 } 8936 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 8937 8938 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 8939 int rssi_min_thold, 8940 int rssi_max_thold) 8941 { 8942 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 8943 8944 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 8945 return; 8946 8947 /* 8948 * Scale up threshold values before storing it, as the RSSI averaging 8949 * algorithm uses a scaled up value as well. Change this scaling 8950 * factor if the RSSI averaging algorithm changes. 8951 */ 8952 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 8953 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 8954 } 8955 8956 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 8957 int rssi_min_thold, 8958 int rssi_max_thold) 8959 { 8960 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8961 8962 WARN_ON(rssi_min_thold == rssi_max_thold || 8963 rssi_min_thold > rssi_max_thold); 8964 8965 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 8966 rssi_max_thold); 8967 } 8968 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 8969 8970 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 8971 { 8972 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8973 8974 _ieee80211_enable_rssi_reports(sdata, 0, 0); 8975 } 8976 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 8977