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 /* 793 * The AP part of the channel request is used to distinguish settings 794 * to the device used for wider bandwidth OFDMA. This is used in the 795 * channel context code to assign two channel contexts even if they're 796 * both for the same channel, if the AP bandwidths are incompatible. 797 * If not EHT (or driver override) then ap.chan == NULL indicates that 798 * there's no wider BW OFDMA used. 799 */ 800 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 801 struct ieee80211_chan_req *chanreq, 802 struct ieee80211_conn_settings *conn, 803 struct cfg80211_chan_def *ap_chandef) 804 { 805 chanreq->ap.chan = NULL; 806 807 if (conn->mode < IEEE80211_CONN_MODE_EHT) 808 return; 809 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 810 return; 811 812 chanreq->ap = *ap_chandef; 813 } 814 815 static struct ieee802_11_elems * 816 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 817 struct ieee80211_conn_settings *conn, 818 struct cfg80211_bss *cbss, int link_id, 819 struct ieee80211_chan_req *chanreq, 820 struct cfg80211_chan_def *ap_chandef) 821 { 822 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 823 struct ieee80211_bss *bss = (void *)cbss->priv; 824 struct ieee80211_channel *channel = cbss->channel; 825 struct ieee80211_elems_parse_params parse_params = { 826 .link_id = -1, 827 .from_ap = true, 828 .start = ies->data, 829 .len = ies->len, 830 }; 831 struct ieee802_11_elems *elems; 832 struct ieee80211_supported_band *sband; 833 enum ieee80211_conn_mode ap_mode; 834 int ret; 835 836 again: 837 parse_params.mode = conn->mode; 838 elems = ieee802_11_parse_elems_full(&parse_params); 839 if (!elems) 840 return ERR_PTR(-ENOMEM); 841 842 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 843 elems, false, conn, ap_chandef); 844 845 /* this should be impossible since parsing depends on our mode */ 846 if (WARN_ON(ap_mode > conn->mode)) { 847 ret = -EINVAL; 848 goto free; 849 } 850 851 if (conn->mode != ap_mode) { 852 conn->mode = ap_mode; 853 kfree(elems); 854 goto again; 855 } 856 857 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 858 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 859 860 sband = sdata->local->hw.wiphy->bands[channel->band]; 861 862 switch (channel->band) { 863 case NL80211_BAND_S1GHZ: 864 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 865 ret = -EINVAL; 866 goto free; 867 } 868 return elems; 869 case NL80211_BAND_6GHZ: 870 if (ap_mode < IEEE80211_CONN_MODE_HE) { 871 sdata_info(sdata, 872 "Rejecting non-HE 6/7 GHz connection"); 873 ret = -EINVAL; 874 goto free; 875 } 876 break; 877 default: 878 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 879 ret = -EINVAL; 880 goto free; 881 } 882 } 883 884 switch (ap_mode) { 885 case IEEE80211_CONN_MODE_S1G: 886 WARN_ON(1); 887 ret = -EINVAL; 888 goto free; 889 case IEEE80211_CONN_MODE_LEGACY: 890 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 891 break; 892 case IEEE80211_CONN_MODE_HT: 893 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 894 conn->bw_limit, 895 IEEE80211_CONN_BW_LIMIT_40); 896 break; 897 case IEEE80211_CONN_MODE_VHT: 898 case IEEE80211_CONN_MODE_HE: 899 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 900 conn->bw_limit, 901 IEEE80211_CONN_BW_LIMIT_160); 902 break; 903 case IEEE80211_CONN_MODE_EHT: 904 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 905 conn->bw_limit, 906 IEEE80211_CONN_BW_LIMIT_320); 907 break; 908 } 909 910 chanreq->oper = *ap_chandef; 911 912 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 913 914 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 915 IEEE80211_CHAN_DISABLED)) { 916 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 917 ret = -EINVAL; 918 goto free; 919 } 920 921 ieee80211_chanreq_downgrade(chanreq, conn); 922 } 923 924 if (conn->mode >= IEEE80211_CONN_MODE_HE && 925 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 926 IEEE80211_CHAN_NO_HE)) { 927 conn->mode = IEEE80211_CONN_MODE_VHT; 928 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 929 conn->bw_limit, 930 IEEE80211_CONN_BW_LIMIT_160); 931 } 932 933 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 934 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 935 IEEE80211_CHAN_NO_EHT)) { 936 conn->mode = IEEE80211_CONN_MODE_HE; 937 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 938 conn->bw_limit, 939 IEEE80211_CONN_BW_LIMIT_160); 940 } 941 942 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 943 sdata_info(sdata, 944 "regulatory prevented using AP config, downgraded\n"); 945 946 if (conn->mode >= IEEE80211_CONN_MODE_HE && 947 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 948 elems->he_operation) || 949 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 950 elems->he_operation))) { 951 conn->mode = IEEE80211_CONN_MODE_VHT; 952 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 953 } 954 955 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 956 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 957 elems->eht_operation)) { 958 conn->mode = IEEE80211_CONN_MODE_HE; 959 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 960 conn->bw_limit, 961 IEEE80211_CONN_BW_LIMIT_160); 962 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 963 } 964 965 /* the mode can only decrease, so this must terminate */ 966 if (ap_mode != conn->mode) { 967 kfree(elems); 968 goto again; 969 } 970 971 mlme_link_id_dbg(sdata, link_id, 972 "connecting with %s mode, max bandwidth %d MHz\n", 973 ieee80211_conn_mode_str(conn->mode), 974 20 * (1 << conn->bw_limit)); 975 976 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 977 ret = -EINVAL; 978 goto free; 979 } 980 981 return elems; 982 free: 983 kfree(elems); 984 return ERR_PTR(ret); 985 } 986 987 static int ieee80211_config_bw(struct ieee80211_link_data *link, 988 struct ieee802_11_elems *elems, 989 bool update, u64 *changed) 990 { 991 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 992 struct ieee80211_sub_if_data *sdata = link->sdata; 993 struct ieee80211_chan_req chanreq = {}; 994 struct cfg80211_chan_def ap_chandef; 995 enum ieee80211_conn_mode ap_mode; 996 u32 vht_cap_info = 0; 997 u16 ht_opmode; 998 int ret; 999 1000 /* don't track any bandwidth changes in legacy/S1G modes */ 1001 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1002 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1003 return 0; 1004 1005 if (elems->vht_cap_elem) 1006 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1007 1008 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1009 elems, true, &link->u.mgd.conn, 1010 &ap_chandef); 1011 1012 if (ap_mode != link->u.mgd.conn.mode) { 1013 link_info(link, 1014 "AP appears to change mode (expected %s, found %s), disconnect\n", 1015 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1016 ieee80211_conn_mode_str(ap_mode)); 1017 return -EINVAL; 1018 } 1019 1020 chanreq.oper = ap_chandef; 1021 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1022 &ap_chandef); 1023 1024 /* 1025 * if HT operation mode changed store the new one - 1026 * this may be applicable even if channel is identical 1027 */ 1028 if (elems->ht_operation) { 1029 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1030 if (link->conf->ht_operation_mode != ht_opmode) { 1031 *changed |= BSS_CHANGED_HT; 1032 link->conf->ht_operation_mode = ht_opmode; 1033 } 1034 } 1035 1036 /* 1037 * Downgrade the new channel if we associated with restricted 1038 * bandwidth capabilities. For example, if we associated as a 1039 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1040 * or config reasons) then switching to a 40 MHz channel now 1041 * won't do us any good -- we couldn't use it with the AP. 1042 */ 1043 while (link->u.mgd.conn.bw_limit < 1044 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1045 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1046 1047 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1048 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1049 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1050 &chanreq.oper); 1051 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1052 link->conf->tpe = elems->tpe; 1053 *changed |= BSS_CHANGED_TPE; 1054 } 1055 } 1056 1057 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1058 return 0; 1059 1060 link_info(link, 1061 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1062 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 1063 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1064 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1065 chanreq.oper.center_freq2); 1066 1067 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1068 sdata_info(sdata, 1069 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 1070 link->u.mgd.bssid); 1071 return -EINVAL; 1072 } 1073 1074 if (!update) { 1075 link->conf->chanreq = chanreq; 1076 return 0; 1077 } 1078 1079 /* 1080 * We're tracking the current AP here, so don't do any further checks 1081 * here. This keeps us from playing ping-pong with regulatory, without 1082 * it the following can happen (for example): 1083 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1084 * - AP advertises regdom US 1085 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1086 * - we detect an unsupported channel and disconnect 1087 * - disconnect causes CRDA to reload world regdomain and the game 1088 * starts anew. 1089 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1090 * 1091 * It seems possible that there are still scenarios with CSA or real 1092 * bandwidth changes where a this could happen, but those cases are 1093 * less common and wouldn't completely prevent using the AP. 1094 */ 1095 1096 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1097 if (ret) { 1098 sdata_info(sdata, 1099 "AP %pM changed bandwidth to incompatible one - disconnect\n", 1100 link->u.mgd.bssid); 1101 return ret; 1102 } 1103 1104 cfg80211_schedule_channels_check(&sdata->wdev); 1105 return 0; 1106 } 1107 1108 /* frame sending functions */ 1109 1110 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1111 struct sk_buff *skb, u8 ap_ht_param, 1112 struct ieee80211_supported_band *sband, 1113 struct ieee80211_channel *channel, 1114 enum ieee80211_smps_mode smps, 1115 const struct ieee80211_conn_settings *conn) 1116 { 1117 u8 *pos; 1118 u32 flags = channel->flags; 1119 u16 cap; 1120 struct ieee80211_sta_ht_cap ht_cap; 1121 1122 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1123 1124 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1125 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1126 1127 /* determine capability flags */ 1128 cap = ht_cap.cap; 1129 1130 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1131 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1132 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1133 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1134 cap &= ~IEEE80211_HT_CAP_SGI_40; 1135 } 1136 break; 1137 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1138 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1139 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1140 cap &= ~IEEE80211_HT_CAP_SGI_40; 1141 } 1142 break; 1143 } 1144 1145 /* 1146 * If 40 MHz was disabled associate as though we weren't 1147 * capable of 40 MHz -- some broken APs will never fall 1148 * back to trying to transmit in 20 MHz. 1149 */ 1150 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1151 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1152 cap &= ~IEEE80211_HT_CAP_SGI_40; 1153 } 1154 1155 /* set SM PS mode properly */ 1156 cap &= ~IEEE80211_HT_CAP_SM_PS; 1157 switch (smps) { 1158 case IEEE80211_SMPS_AUTOMATIC: 1159 case IEEE80211_SMPS_NUM_MODES: 1160 WARN_ON(1); 1161 fallthrough; 1162 case IEEE80211_SMPS_OFF: 1163 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1164 IEEE80211_HT_CAP_SM_PS_SHIFT; 1165 break; 1166 case IEEE80211_SMPS_STATIC: 1167 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1168 IEEE80211_HT_CAP_SM_PS_SHIFT; 1169 break; 1170 case IEEE80211_SMPS_DYNAMIC: 1171 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1172 IEEE80211_HT_CAP_SM_PS_SHIFT; 1173 break; 1174 } 1175 1176 /* reserve and fill IE */ 1177 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1178 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1179 } 1180 1181 /* This function determines vht capability flags for the association 1182 * and builds the IE. 1183 * Note - the function returns true to own the MU-MIMO capability 1184 */ 1185 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1186 struct sk_buff *skb, 1187 struct ieee80211_supported_band *sband, 1188 struct ieee80211_vht_cap *ap_vht_cap, 1189 const struct ieee80211_conn_settings *conn) 1190 { 1191 struct ieee80211_local *local = sdata->local; 1192 u8 *pos; 1193 u32 cap; 1194 struct ieee80211_sta_vht_cap vht_cap; 1195 u32 mask, ap_bf_sts, our_bf_sts; 1196 bool mu_mimo_owner = false; 1197 1198 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1199 1200 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1201 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1202 1203 /* determine capability flags */ 1204 cap = vht_cap.cap; 1205 1206 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1207 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1208 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1209 } 1210 1211 /* 1212 * Some APs apparently get confused if our capabilities are better 1213 * than theirs, so restrict what we advertise in the assoc request. 1214 */ 1215 if (!(ap_vht_cap->vht_cap_info & 1216 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1217 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1218 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1219 else if (!(ap_vht_cap->vht_cap_info & 1220 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1221 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1222 1223 /* 1224 * If some other vif is using the MU-MIMO capability we cannot associate 1225 * using MU-MIMO - this will lead to contradictions in the group-id 1226 * mechanism. 1227 * Ownership is defined since association request, in order to avoid 1228 * simultaneous associations with MU-MIMO. 1229 */ 1230 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1231 bool disable_mu_mimo = false; 1232 struct ieee80211_sub_if_data *other; 1233 1234 list_for_each_entry_rcu(other, &local->interfaces, list) { 1235 if (other->vif.bss_conf.mu_mimo_owner) { 1236 disable_mu_mimo = true; 1237 break; 1238 } 1239 } 1240 if (disable_mu_mimo) 1241 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1242 else 1243 mu_mimo_owner = true; 1244 } 1245 1246 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1247 1248 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1249 our_bf_sts = cap & mask; 1250 1251 if (ap_bf_sts < our_bf_sts) { 1252 cap &= ~mask; 1253 cap |= ap_bf_sts; 1254 } 1255 1256 /* reserve and fill IE */ 1257 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1258 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1259 1260 return mu_mimo_owner; 1261 } 1262 1263 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1264 enum nl80211_chan_width width, 1265 struct ieee80211_supported_band *sband, 1266 struct ieee80211_mgd_assoc_data *assoc_data) 1267 { 1268 u32 rates; 1269 1270 if (assoc_data->supp_rates_len) { 1271 /* 1272 * Get all rates supported by the device and the AP as 1273 * some APs don't like getting a superset of their rates 1274 * in the association request (e.g. D-Link DAP 1353 in 1275 * b-only mode)... 1276 */ 1277 ieee80211_parse_bitrates(width, sband, 1278 assoc_data->supp_rates, 1279 assoc_data->supp_rates_len, 1280 &rates); 1281 } else { 1282 /* 1283 * In case AP not provide any supported rates information 1284 * before association, we send information element(s) with 1285 * all rates that we support. 1286 */ 1287 rates = ~0; 1288 } 1289 1290 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1291 WLAN_EID_SUPP_RATES); 1292 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1293 WLAN_EID_EXT_SUPP_RATES); 1294 } 1295 1296 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1297 const u8 *elems, 1298 size_t elems_len, 1299 size_t offset) 1300 { 1301 size_t noffset; 1302 1303 static const u8 before_ht[] = { 1304 WLAN_EID_SSID, 1305 WLAN_EID_SUPP_RATES, 1306 WLAN_EID_EXT_SUPP_RATES, 1307 WLAN_EID_PWR_CAPABILITY, 1308 WLAN_EID_SUPPORTED_CHANNELS, 1309 WLAN_EID_RSN, 1310 WLAN_EID_QOS_CAPA, 1311 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1312 WLAN_EID_MOBILITY_DOMAIN, 1313 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1314 WLAN_EID_RIC_DATA, /* reassoc only */ 1315 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1316 }; 1317 static const u8 after_ric[] = { 1318 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1319 WLAN_EID_HT_CAPABILITY, 1320 WLAN_EID_BSS_COEX_2040, 1321 /* luckily this is almost always there */ 1322 WLAN_EID_EXT_CAPABILITY, 1323 WLAN_EID_QOS_TRAFFIC_CAPA, 1324 WLAN_EID_TIM_BCAST_REQ, 1325 WLAN_EID_INTERWORKING, 1326 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1327 WLAN_EID_VHT_CAPABILITY, 1328 WLAN_EID_OPMODE_NOTIF, 1329 }; 1330 1331 if (!elems_len) 1332 return offset; 1333 1334 noffset = ieee80211_ie_split_ric(elems, elems_len, 1335 before_ht, 1336 ARRAY_SIZE(before_ht), 1337 after_ric, 1338 ARRAY_SIZE(after_ric), 1339 offset); 1340 skb_put_data(skb, elems + offset, noffset - offset); 1341 1342 return noffset; 1343 } 1344 1345 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1346 const u8 *elems, 1347 size_t elems_len, 1348 size_t offset) 1349 { 1350 static const u8 before_vht[] = { 1351 /* 1352 * no need to list the ones split off before HT 1353 * or generated here 1354 */ 1355 WLAN_EID_BSS_COEX_2040, 1356 WLAN_EID_EXT_CAPABILITY, 1357 WLAN_EID_QOS_TRAFFIC_CAPA, 1358 WLAN_EID_TIM_BCAST_REQ, 1359 WLAN_EID_INTERWORKING, 1360 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1361 }; 1362 size_t noffset; 1363 1364 if (!elems_len) 1365 return offset; 1366 1367 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1368 noffset = ieee80211_ie_split(elems, elems_len, 1369 before_vht, ARRAY_SIZE(before_vht), 1370 offset); 1371 skb_put_data(skb, elems + offset, noffset - offset); 1372 1373 return noffset; 1374 } 1375 1376 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1377 const u8 *elems, 1378 size_t elems_len, 1379 size_t offset) 1380 { 1381 static const u8 before_he[] = { 1382 /* 1383 * no need to list the ones split off before VHT 1384 * or generated here 1385 */ 1386 WLAN_EID_OPMODE_NOTIF, 1387 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1388 /* 11ai elements */ 1389 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1390 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1391 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1392 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1393 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1394 /* TODO: add 11ah/11aj/11ak elements */ 1395 }; 1396 size_t noffset; 1397 1398 if (!elems_len) 1399 return offset; 1400 1401 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1402 noffset = ieee80211_ie_split(elems, elems_len, 1403 before_he, ARRAY_SIZE(before_he), 1404 offset); 1405 skb_put_data(skb, elems + offset, noffset - offset); 1406 1407 return noffset; 1408 } 1409 1410 #define PRESENT_ELEMS_MAX 8 1411 #define PRESENT_ELEM_EXT_OFFS 0x100 1412 1413 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1414 struct sk_buff *skb, u16 capab, 1415 const struct element *ext_capa, 1416 const u16 *present_elems); 1417 1418 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1419 struct sk_buff *skb, u16 *capab, 1420 const struct element *ext_capa, 1421 const u8 *extra_elems, 1422 size_t extra_elems_len, 1423 unsigned int link_id, 1424 struct ieee80211_link_data *link, 1425 u16 *present_elems) 1426 { 1427 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1429 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1430 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1431 struct ieee80211_channel *chan = cbss->channel; 1432 const struct ieee80211_sband_iftype_data *iftd; 1433 struct ieee80211_local *local = sdata->local; 1434 struct ieee80211_supported_band *sband; 1435 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1436 struct ieee80211_chanctx_conf *chanctx_conf; 1437 enum ieee80211_smps_mode smps_mode; 1438 u16 orig_capab = *capab; 1439 size_t offset = 0; 1440 int present_elems_len = 0; 1441 u8 *pos; 1442 int i; 1443 1444 #define ADD_PRESENT_ELEM(id) do { \ 1445 /* need a last for termination - we use 0 == SSID */ \ 1446 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1447 present_elems[present_elems_len++] = (id); \ 1448 } while (0) 1449 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1450 1451 if (link) 1452 smps_mode = link->smps_mode; 1453 else if (sdata->u.mgd.powersave) 1454 smps_mode = IEEE80211_SMPS_DYNAMIC; 1455 else 1456 smps_mode = IEEE80211_SMPS_OFF; 1457 1458 if (link) { 1459 /* 1460 * 5/10 MHz scenarios are only viable without MLO, in which 1461 * case this pointer should be used ... All of this is a bit 1462 * unclear though, not sure this even works at all. 1463 */ 1464 rcu_read_lock(); 1465 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1466 if (chanctx_conf) 1467 width = chanctx_conf->def.width; 1468 rcu_read_unlock(); 1469 } 1470 1471 sband = local->hw.wiphy->bands[chan->band]; 1472 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1473 1474 if (sband->band == NL80211_BAND_2GHZ) { 1475 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1476 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1477 } 1478 1479 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1480 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1481 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1482 1483 if (sband->band != NL80211_BAND_S1GHZ) 1484 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1485 1486 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1487 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1488 struct cfg80211_chan_def chandef = { 1489 .width = width, 1490 .chan = chan, 1491 }; 1492 1493 pos = skb_put(skb, 4); 1494 *pos++ = WLAN_EID_PWR_CAPABILITY; 1495 *pos++ = 2; 1496 *pos++ = 0; /* min tx power */ 1497 /* max tx power */ 1498 *pos++ = ieee80211_chandef_max_power(&chandef); 1499 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1500 } 1501 1502 /* 1503 * Per spec, we shouldn't include the list of channels if we advertise 1504 * support for extended channel switching, but we've always done that; 1505 * (for now?) apply this restriction only on the (new) 6 GHz band. 1506 */ 1507 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1508 (sband->band != NL80211_BAND_6GHZ || 1509 !ext_capa || ext_capa->datalen < 1 || 1510 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1511 /* TODO: get this in reg domain format */ 1512 pos = skb_put(skb, 2 * sband->n_channels + 2); 1513 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1514 *pos++ = 2 * sband->n_channels; 1515 for (i = 0; i < sband->n_channels; i++) { 1516 int cf = sband->channels[i].center_freq; 1517 1518 *pos++ = ieee80211_frequency_to_channel(cf); 1519 *pos++ = 1; /* one channel in the subband*/ 1520 } 1521 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1522 } 1523 1524 /* if present, add any custom IEs that go before HT */ 1525 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1526 extra_elems_len, 1527 offset); 1528 1529 if (sband->band != NL80211_BAND_6GHZ && 1530 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1531 ieee80211_add_ht_ie(sdata, skb, 1532 assoc_data->link[link_id].ap_ht_param, 1533 sband, chan, smps_mode, 1534 &assoc_data->link[link_id].conn); 1535 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1536 } 1537 1538 /* if present, add any custom IEs that go before VHT */ 1539 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1540 extra_elems_len, 1541 offset); 1542 1543 if (sband->band != NL80211_BAND_6GHZ && 1544 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1545 sband->vht_cap.vht_supported) { 1546 bool mu_mimo_owner = 1547 ieee80211_add_vht_ie(sdata, skb, sband, 1548 &assoc_data->link[link_id].ap_vht_cap, 1549 &assoc_data->link[link_id].conn); 1550 1551 if (link) 1552 link->conf->mu_mimo_owner = mu_mimo_owner; 1553 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1554 } 1555 1556 /* if present, add any custom IEs that go before HE */ 1557 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1558 extra_elems_len, 1559 offset); 1560 1561 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1562 ieee80211_put_he_cap(skb, sdata, sband, 1563 &assoc_data->link[link_id].conn); 1564 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1565 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1566 } 1567 1568 /* 1569 * careful - need to know about all the present elems before 1570 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1571 * we're going to put it after the ML element 1572 */ 1573 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1574 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1575 1576 if (link_id == assoc_data->assoc_link_id) 1577 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1578 present_elems); 1579 1580 /* crash if somebody gets it wrong */ 1581 present_elems = NULL; 1582 1583 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1584 ieee80211_put_eht_cap(skb, sdata, sband, 1585 &assoc_data->link[link_id].conn); 1586 1587 if (sband->band == NL80211_BAND_S1GHZ) { 1588 ieee80211_add_aid_request_ie(sdata, skb); 1589 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1590 } 1591 1592 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1593 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1594 1595 return offset; 1596 } 1597 1598 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1599 const u16 *outer, 1600 const u16 *inner) 1601 { 1602 unsigned int skb_len = skb->len; 1603 bool at_extension = false; 1604 bool added = false; 1605 int i, j; 1606 u8 *len, *list_len = NULL; 1607 1608 skb_put_u8(skb, WLAN_EID_EXTENSION); 1609 len = skb_put(skb, 1); 1610 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1611 1612 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1613 u16 elem = outer[i]; 1614 bool have_inner = false; 1615 1616 /* should at least be sorted in the sense of normal -> ext */ 1617 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1618 1619 /* switch to extension list */ 1620 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1621 at_extension = true; 1622 if (!list_len) 1623 skb_put_u8(skb, 0); 1624 list_len = NULL; 1625 } 1626 1627 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1628 if (elem == inner[j]) { 1629 have_inner = true; 1630 break; 1631 } 1632 } 1633 1634 if (have_inner) 1635 continue; 1636 1637 if (!list_len) { 1638 list_len = skb_put(skb, 1); 1639 *list_len = 0; 1640 } 1641 *list_len += 1; 1642 skb_put_u8(skb, (u8)elem); 1643 added = true; 1644 } 1645 1646 /* if we added a list but no extension list, make a zero-len one */ 1647 if (added && (!at_extension || !list_len)) 1648 skb_put_u8(skb, 0); 1649 1650 /* if nothing added remove extension element completely */ 1651 if (!added) 1652 skb_trim(skb, skb_len); 1653 else 1654 *len = skb->len - skb_len - 2; 1655 } 1656 1657 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1658 struct sk_buff *skb, u16 capab, 1659 const struct element *ext_capa, 1660 const u16 *outer_present_elems) 1661 { 1662 struct ieee80211_local *local = sdata->local; 1663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1664 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1665 struct ieee80211_multi_link_elem *ml_elem; 1666 struct ieee80211_mle_basic_common_info *common; 1667 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1668 __le16 eml_capa = 0, mld_capa_ops = 0; 1669 unsigned int link_id; 1670 u8 *ml_elem_len; 1671 void *capab_pos; 1672 1673 if (!ieee80211_vif_is_mld(&sdata->vif)) 1674 return; 1675 1676 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1677 ieee80211_vif_type_p2p(&sdata->vif)); 1678 if (ift_ext_capa) { 1679 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1680 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1681 } 1682 1683 skb_put_u8(skb, WLAN_EID_EXTENSION); 1684 ml_elem_len = skb_put(skb, 1); 1685 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1686 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1687 ml_elem->control = 1688 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1689 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1690 common = skb_put(skb, sizeof(*common)); 1691 common->len = sizeof(*common) + 1692 2; /* MLD capa/ops */ 1693 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1694 1695 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1696 if (eml_capa & 1697 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1698 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1699 common->len += 2; /* EML capabilities */ 1700 ml_elem->control |= 1701 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1702 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1703 } 1704 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1705 1706 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1707 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1708 const u8 *extra_elems; 1709 size_t extra_elems_len; 1710 size_t extra_used; 1711 u8 *subelem_len = NULL; 1712 __le16 ctrl; 1713 1714 if (!assoc_data->link[link_id].bss || 1715 link_id == assoc_data->assoc_link_id) 1716 continue; 1717 1718 extra_elems = assoc_data->link[link_id].elems; 1719 extra_elems_len = assoc_data->link[link_id].elems_len; 1720 1721 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1722 subelem_len = skb_put(skb, 1); 1723 1724 ctrl = cpu_to_le16(link_id | 1725 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1726 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1727 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1728 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1729 skb_put_data(skb, assoc_data->link[link_id].addr, 1730 ETH_ALEN); 1731 /* 1732 * Now add the contents of the (re)association request, 1733 * but the "listen interval" and "current AP address" 1734 * (if applicable) are skipped. So we only have 1735 * the capability field (remember the position and fill 1736 * later), followed by the elements added below by 1737 * calling ieee80211_assoc_link_elems(). 1738 */ 1739 capab_pos = skb_put(skb, 2); 1740 1741 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1742 ext_capa, 1743 extra_elems, 1744 extra_elems_len, 1745 link_id, NULL, 1746 link_present_elems); 1747 if (extra_elems) 1748 skb_put_data(skb, extra_elems + extra_used, 1749 extra_elems_len - extra_used); 1750 1751 put_unaligned_le16(capab, capab_pos); 1752 1753 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1754 link_present_elems); 1755 1756 ieee80211_fragment_element(skb, subelem_len, 1757 IEEE80211_MLE_SUBELEM_FRAGMENT); 1758 } 1759 1760 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1761 } 1762 1763 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1764 { 1765 struct ieee80211_local *local = sdata->local; 1766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1767 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1768 struct ieee80211_link_data *link; 1769 struct sk_buff *skb; 1770 struct ieee80211_mgmt *mgmt; 1771 u8 *pos, qos_info, *ie_start; 1772 size_t offset, noffset; 1773 u16 capab = 0, link_capab; 1774 __le16 listen_int; 1775 struct element *ext_capa = NULL; 1776 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1777 struct ieee80211_prep_tx_info info = {}; 1778 unsigned int link_id, n_links = 0; 1779 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1780 void *capab_pos; 1781 size_t size; 1782 int ret; 1783 1784 /* we know it's writable, cast away the const */ 1785 if (assoc_data->ie_len) 1786 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1787 assoc_data->ie, 1788 assoc_data->ie_len); 1789 1790 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1791 1792 size = local->hw.extra_tx_headroom + 1793 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1794 2 + assoc_data->ssid_len + /* SSID */ 1795 assoc_data->ie_len + /* extra IEs */ 1796 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1797 9; /* WMM */ 1798 1799 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1800 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1801 const struct ieee80211_sband_iftype_data *iftd; 1802 struct ieee80211_supported_band *sband; 1803 1804 if (!cbss) 1805 continue; 1806 1807 sband = local->hw.wiphy->bands[cbss->channel->band]; 1808 1809 n_links++; 1810 /* add STA profile elements length */ 1811 size += assoc_data->link[link_id].elems_len; 1812 /* and supported rates length */ 1813 size += 4 + sband->n_bitrates; 1814 /* supported channels */ 1815 size += 2 + 2 * sband->n_channels; 1816 1817 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1818 if (iftd) 1819 size += iftd->vendor_elems.len; 1820 1821 /* power capability */ 1822 size += 4; 1823 1824 /* HT, VHT, HE, EHT */ 1825 size += 2 + sizeof(struct ieee80211_ht_cap); 1826 size += 2 + sizeof(struct ieee80211_vht_cap); 1827 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1828 sizeof(struct ieee80211_he_mcs_nss_supp) + 1829 IEEE80211_HE_PPE_THRES_MAX_LEN; 1830 1831 if (sband->band == NL80211_BAND_6GHZ) 1832 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1833 1834 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1835 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1836 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1837 1838 /* non-inheritance element */ 1839 size += 2 + 2 + PRESENT_ELEMS_MAX; 1840 1841 /* should be the same across all BSSes */ 1842 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1843 capab |= WLAN_CAPABILITY_PRIVACY; 1844 } 1845 1846 if (ieee80211_vif_is_mld(&sdata->vif)) { 1847 /* consider the multi-link element with STA profile */ 1848 size += sizeof(struct ieee80211_multi_link_elem); 1849 /* max common info field in basic multi-link element */ 1850 size += sizeof(struct ieee80211_mle_basic_common_info) + 1851 2 + /* capa & op */ 1852 2; /* EML capa */ 1853 1854 /* 1855 * The capability elements were already considered above; 1856 * note this over-estimates a bit because there's no 1857 * STA profile for the assoc link. 1858 */ 1859 size += (n_links - 1) * 1860 (1 + 1 + /* subelement ID/length */ 1861 2 + /* STA control */ 1862 1 + ETH_ALEN + 2 /* STA Info field */); 1863 } 1864 1865 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1866 if (WARN_ON(!link)) 1867 return -EINVAL; 1868 1869 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1870 return -EINVAL; 1871 1872 skb = alloc_skb(size, GFP_KERNEL); 1873 if (!skb) 1874 return -ENOMEM; 1875 1876 skb_reserve(skb, local->hw.extra_tx_headroom); 1877 1878 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1879 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1880 1881 /* Set MBSSID support for HE AP if needed */ 1882 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1883 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1884 ext_capa && ext_capa->datalen >= 3) 1885 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1886 1887 mgmt = skb_put_zero(skb, 24); 1888 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1889 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1890 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1891 1892 listen_int = cpu_to_le16(assoc_data->s1g ? 1893 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1894 local->hw.conf.listen_interval); 1895 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1896 skb_put(skb, 10); 1897 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1898 IEEE80211_STYPE_REASSOC_REQ); 1899 capab_pos = &mgmt->u.reassoc_req.capab_info; 1900 mgmt->u.reassoc_req.listen_interval = listen_int; 1901 memcpy(mgmt->u.reassoc_req.current_ap, 1902 assoc_data->prev_ap_addr, ETH_ALEN); 1903 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1904 } else { 1905 skb_put(skb, 4); 1906 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1907 IEEE80211_STYPE_ASSOC_REQ); 1908 capab_pos = &mgmt->u.assoc_req.capab_info; 1909 mgmt->u.assoc_req.listen_interval = listen_int; 1910 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1911 } 1912 1913 /* SSID */ 1914 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1915 ie_start = pos; 1916 *pos++ = WLAN_EID_SSID; 1917 *pos++ = assoc_data->ssid_len; 1918 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1919 1920 /* 1921 * This bit is technically reserved, so it shouldn't matter for either 1922 * the AP or us, but it also means we shouldn't set it. However, we've 1923 * always set it in the past, and apparently some EHT APs check that 1924 * we don't set it. To avoid interoperability issues with old APs that 1925 * for some reason check it and want it to be set, set the bit for all 1926 * pre-EHT connections as we used to do. 1927 */ 1928 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1929 capab |= WLAN_CAPABILITY_ESS; 1930 1931 /* add the elements for the assoc (main) link */ 1932 link_capab = capab; 1933 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1934 ext_capa, 1935 assoc_data->ie, 1936 assoc_data->ie_len, 1937 assoc_data->assoc_link_id, link, 1938 present_elems); 1939 put_unaligned_le16(link_capab, capab_pos); 1940 1941 /* if present, add any custom non-vendor IEs */ 1942 if (assoc_data->ie_len) { 1943 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1944 assoc_data->ie_len, 1945 offset); 1946 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1947 offset = noffset; 1948 } 1949 1950 if (assoc_data->wmm) { 1951 if (assoc_data->uapsd) { 1952 qos_info = ifmgd->uapsd_queues; 1953 qos_info |= (ifmgd->uapsd_max_sp_len << 1954 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1955 } else { 1956 qos_info = 0; 1957 } 1958 1959 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1960 } 1961 1962 /* add any remaining custom (i.e. vendor specific here) IEs */ 1963 if (assoc_data->ie_len) { 1964 noffset = assoc_data->ie_len; 1965 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1966 } 1967 1968 if (assoc_data->fils_kek_len) { 1969 ret = fils_encrypt_assoc_req(skb, assoc_data); 1970 if (ret < 0) { 1971 dev_kfree_skb(skb); 1972 return ret; 1973 } 1974 } 1975 1976 pos = skb_tail_pointer(skb); 1977 kfree(ifmgd->assoc_req_ies); 1978 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1979 if (!ifmgd->assoc_req_ies) { 1980 dev_kfree_skb(skb); 1981 return -ENOMEM; 1982 } 1983 1984 ifmgd->assoc_req_ies_len = pos - ie_start; 1985 1986 info.link_id = assoc_data->assoc_link_id; 1987 drv_mgd_prepare_tx(local, sdata, &info); 1988 1989 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1990 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1991 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1992 IEEE80211_TX_INTFL_MLME_CONN_TX; 1993 ieee80211_tx_skb(sdata, skb); 1994 1995 return 0; 1996 } 1997 1998 void ieee80211_send_pspoll(struct ieee80211_local *local, 1999 struct ieee80211_sub_if_data *sdata) 2000 { 2001 struct ieee80211_pspoll *pspoll; 2002 struct sk_buff *skb; 2003 2004 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2005 if (!skb) 2006 return; 2007 2008 pspoll = (struct ieee80211_pspoll *) skb->data; 2009 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2010 2011 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2012 ieee80211_tx_skb(sdata, skb); 2013 } 2014 2015 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2016 struct ieee80211_sub_if_data *sdata, 2017 bool powersave) 2018 { 2019 struct sk_buff *skb; 2020 struct ieee80211_hdr_3addr *nullfunc; 2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2022 2023 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2024 !ieee80211_hw_check(&local->hw, 2025 DOESNT_SUPPORT_QOS_NDP)); 2026 if (!skb) 2027 return; 2028 2029 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2030 if (powersave) 2031 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2032 2033 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2034 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2035 2036 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2038 2039 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2041 2042 ieee80211_tx_skb(sdata, skb); 2043 } 2044 2045 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2046 struct ieee80211_sub_if_data *sdata) 2047 { 2048 struct sk_buff *skb; 2049 struct ieee80211_hdr *nullfunc; 2050 __le16 fc; 2051 2052 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2053 return; 2054 2055 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2056 if (!skb) 2057 return; 2058 2059 skb_reserve(skb, local->hw.extra_tx_headroom); 2060 2061 nullfunc = skb_put_zero(skb, 30); 2062 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2063 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2064 nullfunc->frame_control = fc; 2065 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2066 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2067 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2068 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2069 2070 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2071 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2072 ieee80211_tx_skb(sdata, skb); 2073 } 2074 2075 /* spectrum management related things */ 2076 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2077 struct wiphy_work *work) 2078 { 2079 struct ieee80211_link_data *link = 2080 container_of(work, struct ieee80211_link_data, 2081 u.mgd.csa.switch_work.work); 2082 struct ieee80211_sub_if_data *sdata = link->sdata; 2083 struct ieee80211_local *local = sdata->local; 2084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2085 int ret; 2086 2087 if (!ieee80211_sdata_running(sdata)) 2088 return; 2089 2090 lockdep_assert_wiphy(local->hw.wiphy); 2091 2092 if (!ifmgd->associated) 2093 return; 2094 2095 if (!link->conf->csa_active) 2096 return; 2097 2098 /* 2099 * If the link isn't active (now), we cannot wait for beacons, won't 2100 * have a reserved chanctx, etc. Just switch over the chandef and 2101 * update cfg80211 directly. 2102 */ 2103 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2104 link->conf->chanreq = link->csa.chanreq; 2105 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2106 link->link_id); 2107 return; 2108 } 2109 2110 /* 2111 * using reservation isn't immediate as it may be deferred until later 2112 * with multi-vif. once reservation is complete it will re-schedule the 2113 * work with no reserved_chanctx so verify chandef to check if it 2114 * completed successfully 2115 */ 2116 2117 if (link->reserved_chanctx) { 2118 /* 2119 * with multi-vif csa driver may call ieee80211_csa_finish() 2120 * many times while waiting for other interfaces to use their 2121 * reservations 2122 */ 2123 if (link->reserved_ready) 2124 return; 2125 2126 ret = ieee80211_link_use_reserved_context(link); 2127 if (ret) { 2128 link_info(link, 2129 "failed to use reserved channel context, disconnecting (err=%d)\n", 2130 ret); 2131 wiphy_work_queue(sdata->local->hw.wiphy, 2132 &ifmgd->csa_connection_drop_work); 2133 } 2134 return; 2135 } 2136 2137 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2138 &link->csa.chanreq)) { 2139 link_info(link, 2140 "failed to finalize channel switch, disconnecting\n"); 2141 wiphy_work_queue(sdata->local->hw.wiphy, 2142 &ifmgd->csa_connection_drop_work); 2143 return; 2144 } 2145 2146 link->u.mgd.csa.waiting_bcn = true; 2147 2148 /* apply new TPE restrictions immediately on the new channel */ 2149 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2150 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2151 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2152 &link->u.mgd.csa.ap_chandef, 2153 &link->conf->chanreq.oper); 2154 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2155 sizeof(link->u.mgd.csa.tpe))) { 2156 link->conf->tpe = link->u.mgd.csa.tpe; 2157 ieee80211_link_info_change_notify(sdata, link, 2158 BSS_CHANGED_TPE); 2159 } 2160 } 2161 2162 ieee80211_sta_reset_beacon_monitor(sdata); 2163 ieee80211_sta_reset_conn_monitor(sdata); 2164 } 2165 2166 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2167 { 2168 struct ieee80211_sub_if_data *sdata = link->sdata; 2169 struct ieee80211_local *local = sdata->local; 2170 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2171 int ret; 2172 2173 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2174 2175 WARN_ON(!link->conf->csa_active); 2176 2177 if (sdata->csa_blocked_queues) { 2178 ieee80211_wake_vif_queues(local, sdata, 2179 IEEE80211_QUEUE_STOP_REASON_CSA); 2180 sdata->csa_blocked_queues = false; 2181 } 2182 2183 link->conf->csa_active = false; 2184 link->u.mgd.csa.blocked_tx = false; 2185 link->u.mgd.csa.waiting_bcn = false; 2186 2187 ret = drv_post_channel_switch(link); 2188 if (ret) { 2189 link_info(link, 2190 "driver post channel switch failed, disconnecting\n"); 2191 wiphy_work_queue(sdata->local->hw.wiphy, 2192 &ifmgd->csa_connection_drop_work); 2193 return; 2194 } 2195 2196 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2197 link->link_id); 2198 } 2199 2200 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2201 unsigned int link_id) 2202 { 2203 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2204 2205 trace_api_chswitch_done(sdata, success, link_id); 2206 2207 rcu_read_lock(); 2208 2209 if (!success) { 2210 sdata_info(sdata, 2211 "driver channel switch failed (link %d), disconnecting\n", 2212 link_id); 2213 wiphy_work_queue(sdata->local->hw.wiphy, 2214 &sdata->u.mgd.csa_connection_drop_work); 2215 } else { 2216 struct ieee80211_link_data *link = 2217 rcu_dereference(sdata->link[link_id]); 2218 2219 if (WARN_ON(!link)) { 2220 rcu_read_unlock(); 2221 return; 2222 } 2223 2224 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2225 &link->u.mgd.csa.switch_work, 0); 2226 } 2227 2228 rcu_read_unlock(); 2229 } 2230 EXPORT_SYMBOL(ieee80211_chswitch_done); 2231 2232 static void 2233 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2234 { 2235 struct ieee80211_sub_if_data *sdata = link->sdata; 2236 struct ieee80211_local *local = sdata->local; 2237 2238 lockdep_assert_wiphy(local->hw.wiphy); 2239 2240 if (!local->ops->abort_channel_switch) 2241 return; 2242 2243 ieee80211_link_unreserve_chanctx(link); 2244 2245 if (sdata->csa_blocked_queues) { 2246 ieee80211_wake_vif_queues(local, sdata, 2247 IEEE80211_QUEUE_STOP_REASON_CSA); 2248 sdata->csa_blocked_queues = false; 2249 } 2250 2251 link->conf->csa_active = false; 2252 link->u.mgd.csa.blocked_tx = false; 2253 2254 drv_abort_channel_switch(link); 2255 } 2256 2257 struct sta_csa_rnr_iter_data { 2258 struct ieee80211_link_data *link; 2259 struct ieee80211_channel *chan; 2260 u8 mld_id; 2261 }; 2262 2263 static enum cfg80211_rnr_iter_ret 2264 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2265 const struct ieee80211_neighbor_ap_info *info, 2266 const u8 *tbtt_info, u8 tbtt_info_len) 2267 { 2268 struct sta_csa_rnr_iter_data *data = _data; 2269 struct ieee80211_link_data *link = data->link; 2270 struct ieee80211_sub_if_data *sdata = link->sdata; 2271 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2272 const struct ieee80211_tbtt_info_ge_11 *ti; 2273 enum nl80211_band band; 2274 unsigned int center_freq; 2275 int link_id; 2276 2277 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2278 return RNR_ITER_CONTINUE; 2279 2280 if (tbtt_info_len < sizeof(*ti)) 2281 return RNR_ITER_CONTINUE; 2282 2283 ti = (const void *)tbtt_info; 2284 2285 if (ti->mld_params.mld_id != data->mld_id) 2286 return RNR_ITER_CONTINUE; 2287 2288 link_id = le16_get_bits(ti->mld_params.params, 2289 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2290 if (link_id != data->link->link_id) 2291 return RNR_ITER_CONTINUE; 2292 2293 /* we found the entry for our link! */ 2294 2295 /* this AP is confused, it had this right before ... just disconnect */ 2296 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2297 link_info(link, 2298 "AP now has invalid operating class in RNR, disconnect\n"); 2299 wiphy_work_queue(sdata->local->hw.wiphy, 2300 &ifmgd->csa_connection_drop_work); 2301 return RNR_ITER_BREAK; 2302 } 2303 2304 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2305 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2306 2307 return RNR_ITER_BREAK; 2308 } 2309 2310 static void 2311 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2312 struct ieee802_11_elems *elems) 2313 { 2314 struct ieee80211_sub_if_data *sdata = link->sdata; 2315 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2316 struct sta_csa_rnr_iter_data data = { 2317 .link = link, 2318 }; 2319 2320 /* 2321 * If we get here, we see a beacon from another link without 2322 * CSA still being reported for it, so now we have to check 2323 * if the CSA was aborted or completed. This may not even be 2324 * perfectly possible if the CSA was only done for changing 2325 * the puncturing, but in that case if the link in inactive 2326 * we don't really care, and if it's an active link (or when 2327 * it's activated later) we'll get a beacon and adjust. 2328 */ 2329 2330 if (WARN_ON(!elems->ml_basic)) 2331 return; 2332 2333 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2334 2335 /* 2336 * So in order to do this, iterate the RNR element(s) and see 2337 * what channel is reported now. 2338 */ 2339 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2340 ieee80211_sta_csa_rnr_iter, &data); 2341 2342 if (!data.chan) { 2343 link_info(link, 2344 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2345 wiphy_work_queue(sdata->local->hw.wiphy, 2346 &ifmgd->csa_connection_drop_work); 2347 return; 2348 } 2349 2350 /* 2351 * If it doesn't match the CSA, then assume it aborted. This 2352 * may erroneously detect that it was _not_ aborted when it 2353 * was in fact aborted, but only changed the bandwidth or the 2354 * puncturing configuration, but we don't have enough data to 2355 * detect that. 2356 */ 2357 if (data.chan != link->csa.chanreq.oper.chan) 2358 ieee80211_sta_abort_chanswitch(link); 2359 } 2360 2361 enum ieee80211_csa_source { 2362 IEEE80211_CSA_SOURCE_BEACON, 2363 IEEE80211_CSA_SOURCE_OTHER_LINK, 2364 IEEE80211_CSA_SOURCE_ACTION, 2365 }; 2366 2367 static void 2368 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2369 u64 timestamp, u32 device_timestamp, 2370 struct ieee802_11_elems *full_elems, 2371 struct ieee802_11_elems *csa_elems, 2372 enum ieee80211_csa_source source) 2373 { 2374 struct ieee80211_sub_if_data *sdata = link->sdata; 2375 struct ieee80211_local *local = sdata->local; 2376 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2377 struct ieee80211_chanctx *chanctx = NULL; 2378 struct ieee80211_chanctx_conf *conf; 2379 struct ieee80211_csa_ie csa_ie = {}; 2380 struct ieee80211_channel_switch ch_switch = { 2381 .link_id = link->link_id, 2382 .timestamp = timestamp, 2383 .device_timestamp = device_timestamp, 2384 }; 2385 unsigned long now; 2386 int res; 2387 2388 lockdep_assert_wiphy(local->hw.wiphy); 2389 2390 if (csa_elems) { 2391 struct cfg80211_bss *cbss = link->conf->bss; 2392 enum nl80211_band current_band; 2393 struct ieee80211_bss *bss; 2394 2395 if (WARN_ON(!cbss)) 2396 return; 2397 2398 current_band = cbss->channel->band; 2399 bss = (void *)cbss->priv; 2400 2401 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2402 current_band, 2403 bss->vht_cap_info, 2404 &link->u.mgd.conn, 2405 link->u.mgd.bssid, &csa_ie); 2406 if (res == 0) { 2407 ch_switch.block_tx = csa_ie.mode; 2408 ch_switch.chandef = csa_ie.chanreq.oper; 2409 ch_switch.count = csa_ie.count; 2410 ch_switch.delay = csa_ie.max_switch_time; 2411 } 2412 2413 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2414 } else { 2415 /* 2416 * If there was no per-STA profile for this link, we 2417 * get called with csa_elems == NULL. This of course means 2418 * there are no CSA elements, so set res=1 indicating 2419 * no more CSA. 2420 */ 2421 res = 1; 2422 } 2423 2424 if (res < 0) 2425 goto drop_connection; 2426 2427 if (link->conf->csa_active) { 2428 switch (source) { 2429 case IEEE80211_CSA_SOURCE_ACTION: 2430 /* already processing - disregard action frames */ 2431 return; 2432 case IEEE80211_CSA_SOURCE_BEACON: 2433 if (link->u.mgd.csa.waiting_bcn) { 2434 ieee80211_chswitch_post_beacon(link); 2435 /* 2436 * If the CSA is still present after the switch 2437 * we need to consider it as a new CSA (possibly 2438 * to self). This happens by not returning here 2439 * so we'll get to the check below. 2440 */ 2441 } else if (res) { 2442 ieee80211_sta_abort_chanswitch(link); 2443 return; 2444 } else { 2445 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2446 return; 2447 } 2448 break; 2449 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2450 /* active link: we want to see the beacon to continue */ 2451 if (ieee80211_vif_link_active(&sdata->vif, 2452 link->link_id)) 2453 return; 2454 2455 /* switch work ran, so just complete the process */ 2456 if (link->u.mgd.csa.waiting_bcn) { 2457 ieee80211_chswitch_post_beacon(link); 2458 /* 2459 * If the CSA is still present after the switch 2460 * we need to consider it as a new CSA (possibly 2461 * to self). This happens by not returning here 2462 * so we'll get to the check below. 2463 */ 2464 break; 2465 } 2466 2467 /* link still has CSA but we already know, do nothing */ 2468 if (!res) 2469 return; 2470 2471 /* check in the RNR if the CSA aborted */ 2472 ieee80211_sta_other_link_csa_disappeared(link, 2473 full_elems); 2474 return; 2475 } 2476 } 2477 2478 /* nothing to do at all - no active CSA nor a new one */ 2479 if (res) 2480 return; 2481 2482 if (link->conf->chanreq.oper.chan->band != 2483 csa_ie.chanreq.oper.chan->band) { 2484 link_info(link, 2485 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2486 link->u.mgd.bssid, 2487 csa_ie.chanreq.oper.chan->center_freq, 2488 csa_ie.chanreq.oper.width, 2489 csa_ie.chanreq.oper.center_freq1, 2490 csa_ie.chanreq.oper.center_freq2); 2491 goto drop_connection; 2492 } 2493 2494 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2495 IEEE80211_CHAN_DISABLED)) { 2496 link_info(link, 2497 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2498 link->u.mgd.bssid, 2499 csa_ie.chanreq.oper.chan->center_freq, 2500 csa_ie.chanreq.oper.chan->freq_offset, 2501 csa_ie.chanreq.oper.width, 2502 csa_ie.chanreq.oper.center_freq1, 2503 csa_ie.chanreq.oper.freq1_offset, 2504 csa_ie.chanreq.oper.center_freq2); 2505 goto drop_connection; 2506 } 2507 2508 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2509 &link->conf->chanreq.oper) && 2510 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2511 if (link->u.mgd.csa.ignored_same_chan) 2512 return; 2513 link_info(link, 2514 "AP %pM tries to chanswitch to same channel, ignore\n", 2515 link->u.mgd.bssid); 2516 link->u.mgd.csa.ignored_same_chan = true; 2517 return; 2518 } 2519 2520 /* 2521 * Drop all TDLS peers on the affected link - either we disconnect or 2522 * move to a different channel from this point on. There's no telling 2523 * what our peer will do. 2524 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2525 * have an incompatible wider chandef. 2526 */ 2527 ieee80211_teardown_tdls_peers(link); 2528 2529 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2530 lockdep_is_held(&local->hw.wiphy->mtx)); 2531 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2532 link_info(link, 2533 "no channel context assigned to vif?, disconnecting\n"); 2534 goto drop_connection; 2535 } 2536 2537 if (conf) 2538 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2539 2540 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2541 link_info(link, 2542 "driver doesn't support chan-switch with channel contexts\n"); 2543 goto drop_connection; 2544 } 2545 2546 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2547 link_info(link, 2548 "preparing for channel switch failed, disconnecting\n"); 2549 goto drop_connection; 2550 } 2551 2552 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2553 2554 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2555 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2556 &csa_ie.chanreq.ap); 2557 2558 if (chanctx) { 2559 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2560 chanctx->mode, false); 2561 if (res) { 2562 link_info(link, 2563 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2564 res); 2565 goto drop_connection; 2566 } 2567 } 2568 2569 link->conf->csa_active = true; 2570 link->u.mgd.csa.ignored_same_chan = false; 2571 link->u.mgd.beacon_crc_valid = false; 2572 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2573 2574 if (csa_ie.mode && 2575 !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA)) { 2576 ieee80211_stop_vif_queues(local, sdata, 2577 IEEE80211_QUEUE_STOP_REASON_CSA); 2578 sdata->csa_blocked_queues = true; 2579 } 2580 2581 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2582 link->link_id, csa_ie.count, 2583 csa_ie.mode); 2584 2585 /* we may have to handle timeout for deactivated link in software */ 2586 now = jiffies; 2587 link->u.mgd.csa.time = now + 2588 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2589 link->conf->beacon_int); 2590 2591 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2592 local->ops->channel_switch) { 2593 /* 2594 * Use driver's channel switch callback, the driver will 2595 * later call ieee80211_chswitch_done(). It may deactivate 2596 * the link as well, we handle that elsewhere and queue 2597 * the csa.switch_work for the calculated time then. 2598 */ 2599 drv_channel_switch(local, sdata, &ch_switch); 2600 return; 2601 } 2602 2603 /* channel switch handled in software */ 2604 wiphy_delayed_work_queue(local->hw.wiphy, 2605 &link->u.mgd.csa.switch_work, 2606 link->u.mgd.csa.time - now); 2607 return; 2608 drop_connection: 2609 /* 2610 * This is just so that the disconnect flow will know that 2611 * we were trying to switch channel and failed. In case the 2612 * mode is 1 (we are not allowed to Tx), we will know not to 2613 * send a deauthentication frame. Those two fields will be 2614 * reset when the disconnection worker runs. 2615 */ 2616 link->conf->csa_active = true; 2617 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2618 sdata->csa_blocked_queues = 2619 csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA); 2620 2621 wiphy_work_queue(sdata->local->hw.wiphy, 2622 &ifmgd->csa_connection_drop_work); 2623 } 2624 2625 static bool 2626 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2627 struct ieee80211_channel *channel, 2628 const u8 *country_ie, u8 country_ie_len, 2629 const u8 *pwr_constr_elem, 2630 int *chan_pwr, int *pwr_reduction) 2631 { 2632 struct ieee80211_country_ie_triplet *triplet; 2633 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2634 int i, chan_increment; 2635 bool have_chan_pwr = false; 2636 2637 /* Invalid IE */ 2638 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2639 return false; 2640 2641 triplet = (void *)(country_ie + 3); 2642 country_ie_len -= 3; 2643 2644 switch (channel->band) { 2645 default: 2646 WARN_ON_ONCE(1); 2647 fallthrough; 2648 case NL80211_BAND_2GHZ: 2649 case NL80211_BAND_60GHZ: 2650 case NL80211_BAND_LC: 2651 chan_increment = 1; 2652 break; 2653 case NL80211_BAND_5GHZ: 2654 chan_increment = 4; 2655 break; 2656 case NL80211_BAND_6GHZ: 2657 /* 2658 * In the 6 GHz band, the "maximum transmit power level" 2659 * field in the triplets is reserved, and thus will be 2660 * zero and we shouldn't use it to control TX power. 2661 * The actual TX power will be given in the transmit 2662 * power envelope element instead. 2663 */ 2664 return false; 2665 } 2666 2667 /* find channel */ 2668 while (country_ie_len >= 3) { 2669 u8 first_channel = triplet->chans.first_channel; 2670 2671 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2672 goto next; 2673 2674 for (i = 0; i < triplet->chans.num_channels; i++) { 2675 if (first_channel + i * chan_increment == chan) { 2676 have_chan_pwr = true; 2677 *chan_pwr = triplet->chans.max_power; 2678 break; 2679 } 2680 } 2681 if (have_chan_pwr) 2682 break; 2683 2684 next: 2685 triplet++; 2686 country_ie_len -= 3; 2687 } 2688 2689 if (have_chan_pwr && pwr_constr_elem) 2690 *pwr_reduction = *pwr_constr_elem; 2691 else 2692 *pwr_reduction = 0; 2693 2694 return have_chan_pwr; 2695 } 2696 2697 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2698 struct ieee80211_channel *channel, 2699 const u8 *cisco_dtpc_ie, 2700 int *pwr_level) 2701 { 2702 /* From practical testing, the first data byte of the DTPC element 2703 * seems to contain the requested dBm level, and the CLI on Cisco 2704 * APs clearly state the range is -127 to 127 dBm, which indicates 2705 * a signed byte, although it seemingly never actually goes negative. 2706 * The other byte seems to always be zero. 2707 */ 2708 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2709 } 2710 2711 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2712 struct ieee80211_channel *channel, 2713 struct ieee80211_mgmt *mgmt, 2714 const u8 *country_ie, u8 country_ie_len, 2715 const u8 *pwr_constr_ie, 2716 const u8 *cisco_dtpc_ie) 2717 { 2718 struct ieee80211_sub_if_data *sdata = link->sdata; 2719 bool has_80211h_pwr = false, has_cisco_pwr = false; 2720 int chan_pwr = 0, pwr_reduction_80211h = 0; 2721 int pwr_level_cisco, pwr_level_80211h; 2722 int new_ap_level; 2723 __le16 capab = mgmt->u.probe_resp.capab_info; 2724 2725 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2726 return 0; /* TODO */ 2727 2728 if (country_ie && 2729 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2730 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2731 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2732 sdata, channel, country_ie, country_ie_len, 2733 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2734 pwr_level_80211h = 2735 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2736 } 2737 2738 if (cisco_dtpc_ie) { 2739 ieee80211_find_cisco_dtpc( 2740 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2741 has_cisco_pwr = true; 2742 } 2743 2744 if (!has_80211h_pwr && !has_cisco_pwr) 2745 return 0; 2746 2747 /* If we have both 802.11h and Cisco DTPC, apply both limits 2748 * by picking the smallest of the two power levels advertised. 2749 */ 2750 if (has_80211h_pwr && 2751 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2752 new_ap_level = pwr_level_80211h; 2753 2754 if (link->ap_power_level == new_ap_level) 2755 return 0; 2756 2757 sdata_dbg(sdata, 2758 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2759 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2760 link->u.mgd.bssid); 2761 } else { /* has_cisco_pwr is always true here. */ 2762 new_ap_level = pwr_level_cisco; 2763 2764 if (link->ap_power_level == new_ap_level) 2765 return 0; 2766 2767 sdata_dbg(sdata, 2768 "Limiting TX power to %d dBm as advertised by %pM\n", 2769 pwr_level_cisco, link->u.mgd.bssid); 2770 } 2771 2772 link->ap_power_level = new_ap_level; 2773 if (__ieee80211_recalc_txpower(sdata)) 2774 return BSS_CHANGED_TXPOWER; 2775 return 0; 2776 } 2777 2778 /* powersave */ 2779 static void ieee80211_enable_ps(struct ieee80211_local *local, 2780 struct ieee80211_sub_if_data *sdata) 2781 { 2782 struct ieee80211_conf *conf = &local->hw.conf; 2783 2784 /* 2785 * If we are scanning right now then the parameters will 2786 * take effect when scan finishes. 2787 */ 2788 if (local->scanning) 2789 return; 2790 2791 if (conf->dynamic_ps_timeout > 0 && 2792 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2793 mod_timer(&local->dynamic_ps_timer, jiffies + 2794 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2795 } else { 2796 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2797 ieee80211_send_nullfunc(local, sdata, true); 2798 2799 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2800 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2801 return; 2802 2803 conf->flags |= IEEE80211_CONF_PS; 2804 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2805 } 2806 } 2807 2808 static void ieee80211_change_ps(struct ieee80211_local *local) 2809 { 2810 struct ieee80211_conf *conf = &local->hw.conf; 2811 2812 if (local->ps_sdata) { 2813 ieee80211_enable_ps(local, local->ps_sdata); 2814 } else if (conf->flags & IEEE80211_CONF_PS) { 2815 conf->flags &= ~IEEE80211_CONF_PS; 2816 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2817 del_timer_sync(&local->dynamic_ps_timer); 2818 wiphy_work_cancel(local->hw.wiphy, 2819 &local->dynamic_ps_enable_work); 2820 } 2821 } 2822 2823 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2824 { 2825 struct ieee80211_local *local = sdata->local; 2826 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2827 struct sta_info *sta = NULL; 2828 bool authorized = false; 2829 2830 if (!mgd->powersave) 2831 return false; 2832 2833 if (mgd->broken_ap) 2834 return false; 2835 2836 if (!mgd->associated) 2837 return false; 2838 2839 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2840 return false; 2841 2842 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2843 !sdata->deflink.u.mgd.have_beacon) 2844 return false; 2845 2846 rcu_read_lock(); 2847 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2848 if (sta) 2849 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2850 rcu_read_unlock(); 2851 2852 return authorized; 2853 } 2854 2855 /* need to hold RTNL or interface lock */ 2856 void ieee80211_recalc_ps(struct ieee80211_local *local) 2857 { 2858 struct ieee80211_sub_if_data *sdata, *found = NULL; 2859 int count = 0; 2860 int timeout; 2861 2862 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2863 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2864 local->ps_sdata = NULL; 2865 return; 2866 } 2867 2868 list_for_each_entry(sdata, &local->interfaces, list) { 2869 if (!ieee80211_sdata_running(sdata)) 2870 continue; 2871 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2872 /* If an AP vif is found, then disable PS 2873 * by setting the count to zero thereby setting 2874 * ps_sdata to NULL. 2875 */ 2876 count = 0; 2877 break; 2878 } 2879 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2880 continue; 2881 found = sdata; 2882 count++; 2883 } 2884 2885 if (count == 1 && ieee80211_powersave_allowed(found)) { 2886 u8 dtimper = found->deflink.u.mgd.dtim_period; 2887 2888 timeout = local->dynamic_ps_forced_timeout; 2889 if (timeout < 0) 2890 timeout = 100; 2891 local->hw.conf.dynamic_ps_timeout = timeout; 2892 2893 /* If the TIM IE is invalid, pretend the value is 1 */ 2894 if (!dtimper) 2895 dtimper = 1; 2896 2897 local->hw.conf.ps_dtim_period = dtimper; 2898 local->ps_sdata = found; 2899 } else { 2900 local->ps_sdata = NULL; 2901 } 2902 2903 ieee80211_change_ps(local); 2904 } 2905 2906 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2907 { 2908 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2909 2910 if (sdata->vif.cfg.ps != ps_allowed) { 2911 sdata->vif.cfg.ps = ps_allowed; 2912 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2913 } 2914 } 2915 2916 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2917 struct wiphy_work *work) 2918 { 2919 struct ieee80211_local *local = 2920 container_of(work, struct ieee80211_local, 2921 dynamic_ps_disable_work); 2922 2923 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2924 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2925 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2926 } 2927 2928 ieee80211_wake_queues_by_reason(&local->hw, 2929 IEEE80211_MAX_QUEUE_MAP, 2930 IEEE80211_QUEUE_STOP_REASON_PS, 2931 false); 2932 } 2933 2934 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2935 struct wiphy_work *work) 2936 { 2937 struct ieee80211_local *local = 2938 container_of(work, struct ieee80211_local, 2939 dynamic_ps_enable_work); 2940 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2941 struct ieee80211_if_managed *ifmgd; 2942 unsigned long flags; 2943 int q; 2944 2945 /* can only happen when PS was just disabled anyway */ 2946 if (!sdata) 2947 return; 2948 2949 ifmgd = &sdata->u.mgd; 2950 2951 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2952 return; 2953 2954 if (local->hw.conf.dynamic_ps_timeout > 0) { 2955 /* don't enter PS if TX frames are pending */ 2956 if (drv_tx_frames_pending(local)) { 2957 mod_timer(&local->dynamic_ps_timer, jiffies + 2958 msecs_to_jiffies( 2959 local->hw.conf.dynamic_ps_timeout)); 2960 return; 2961 } 2962 2963 /* 2964 * transmission can be stopped by others which leads to 2965 * dynamic_ps_timer expiry. Postpone the ps timer if it 2966 * is not the actual idle state. 2967 */ 2968 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2969 for (q = 0; q < local->hw.queues; q++) { 2970 if (local->queue_stop_reasons[q]) { 2971 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2972 flags); 2973 mod_timer(&local->dynamic_ps_timer, jiffies + 2974 msecs_to_jiffies( 2975 local->hw.conf.dynamic_ps_timeout)); 2976 return; 2977 } 2978 } 2979 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2980 } 2981 2982 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2983 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2984 if (drv_tx_frames_pending(local)) { 2985 mod_timer(&local->dynamic_ps_timer, jiffies + 2986 msecs_to_jiffies( 2987 local->hw.conf.dynamic_ps_timeout)); 2988 } else { 2989 ieee80211_send_nullfunc(local, sdata, true); 2990 /* Flush to get the tx status of nullfunc frame */ 2991 ieee80211_flush_queues(local, sdata, false); 2992 } 2993 } 2994 2995 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2996 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2997 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2998 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2999 local->hw.conf.flags |= IEEE80211_CONF_PS; 3000 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3001 } 3002 } 3003 3004 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3005 { 3006 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3007 3008 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3009 } 3010 3011 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3012 { 3013 struct ieee80211_sub_if_data *sdata = 3014 container_of(work, struct ieee80211_sub_if_data, 3015 dfs_cac_timer_work.work); 3016 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chanreq.oper; 3017 3018 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3019 3020 if (sdata->wdev.cac_started) { 3021 ieee80211_link_release_channel(&sdata->deflink); 3022 cfg80211_cac_event(sdata->dev, &chandef, 3023 NL80211_RADAR_CAC_FINISHED, 3024 GFP_KERNEL); 3025 } 3026 } 3027 3028 static bool 3029 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3030 { 3031 struct ieee80211_local *local = sdata->local; 3032 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3033 bool ret = false; 3034 int ac; 3035 3036 if (local->hw.queues < IEEE80211_NUM_ACS) 3037 return false; 3038 3039 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3040 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3041 int non_acm_ac; 3042 unsigned long now = jiffies; 3043 3044 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3045 tx_tspec->admitted_time && 3046 time_after(now, tx_tspec->time_slice_start + HZ)) { 3047 tx_tspec->consumed_tx_time = 0; 3048 tx_tspec->time_slice_start = now; 3049 3050 if (tx_tspec->downgraded) 3051 tx_tspec->action = 3052 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3053 } 3054 3055 switch (tx_tspec->action) { 3056 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3057 /* take the original parameters */ 3058 if (drv_conf_tx(local, &sdata->deflink, ac, 3059 &sdata->deflink.tx_conf[ac])) 3060 link_err(&sdata->deflink, 3061 "failed to set TX queue parameters for queue %d\n", 3062 ac); 3063 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3064 tx_tspec->downgraded = false; 3065 ret = true; 3066 break; 3067 case TX_TSPEC_ACTION_DOWNGRADE: 3068 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3069 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3070 ret = true; 3071 break; 3072 } 3073 /* downgrade next lower non-ACM AC */ 3074 for (non_acm_ac = ac + 1; 3075 non_acm_ac < IEEE80211_NUM_ACS; 3076 non_acm_ac++) 3077 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3078 break; 3079 /* Usually the loop will result in using BK even if it 3080 * requires admission control, but such a configuration 3081 * makes no sense and we have to transmit somehow - the 3082 * AC selection does the same thing. 3083 * If we started out trying to downgrade from BK, then 3084 * the extra condition here might be needed. 3085 */ 3086 if (non_acm_ac >= IEEE80211_NUM_ACS) 3087 non_acm_ac = IEEE80211_AC_BK; 3088 if (drv_conf_tx(local, &sdata->deflink, ac, 3089 &sdata->deflink.tx_conf[non_acm_ac])) 3090 link_err(&sdata->deflink, 3091 "failed to set TX queue parameters for queue %d\n", 3092 ac); 3093 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3094 ret = true; 3095 wiphy_delayed_work_queue(local->hw.wiphy, 3096 &ifmgd->tx_tspec_wk, 3097 tx_tspec->time_slice_start + 3098 HZ - now + 1); 3099 break; 3100 case TX_TSPEC_ACTION_NONE: 3101 /* nothing now */ 3102 break; 3103 } 3104 } 3105 3106 return ret; 3107 } 3108 3109 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3110 { 3111 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3112 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3113 BSS_CHANGED_QOS); 3114 } 3115 3116 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3117 struct wiphy_work *work) 3118 { 3119 struct ieee80211_sub_if_data *sdata; 3120 3121 sdata = container_of(work, struct ieee80211_sub_if_data, 3122 u.mgd.tx_tspec_wk.work); 3123 ieee80211_sta_handle_tspec_ac_params(sdata); 3124 } 3125 3126 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3127 { 3128 struct ieee80211_sub_if_data *sdata = link->sdata; 3129 struct ieee80211_local *local = sdata->local; 3130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3131 struct ieee80211_tx_queue_params *params = link->tx_conf; 3132 u8 ac; 3133 3134 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3135 mlme_dbg(sdata, 3136 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3137 ac, params[ac].acm, 3138 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3139 params[ac].txop, params[ac].uapsd, 3140 ifmgd->tx_tspec[ac].downgraded); 3141 if (!ifmgd->tx_tspec[ac].downgraded && 3142 drv_conf_tx(local, link, ac, ¶ms[ac])) 3143 link_err(link, 3144 "failed to set TX queue parameters for AC %d\n", 3145 ac); 3146 } 3147 } 3148 3149 /* MLME */ 3150 static bool 3151 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3152 struct ieee80211_link_data *link, 3153 const u8 *wmm_param, size_t wmm_param_len, 3154 const struct ieee80211_mu_edca_param_set *mu_edca) 3155 { 3156 struct ieee80211_sub_if_data *sdata = link->sdata; 3157 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3159 size_t left; 3160 int count, mu_edca_count, ac; 3161 const u8 *pos; 3162 u8 uapsd_queues = 0; 3163 3164 if (!local->ops->conf_tx) 3165 return false; 3166 3167 if (local->hw.queues < IEEE80211_NUM_ACS) 3168 return false; 3169 3170 if (!wmm_param) 3171 return false; 3172 3173 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3174 return false; 3175 3176 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3177 uapsd_queues = ifmgd->uapsd_queues; 3178 3179 count = wmm_param[6] & 0x0f; 3180 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3181 * if mu_edca was preset before and now it disappeared tell 3182 * the driver about it. 3183 */ 3184 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3185 if (count == link->u.mgd.wmm_last_param_set && 3186 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3187 return false; 3188 link->u.mgd.wmm_last_param_set = count; 3189 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3190 3191 pos = wmm_param + 8; 3192 left = wmm_param_len - 8; 3193 3194 memset(¶ms, 0, sizeof(params)); 3195 3196 sdata->wmm_acm = 0; 3197 for (; left >= 4; left -= 4, pos += 4) { 3198 int aci = (pos[0] >> 5) & 0x03; 3199 int acm = (pos[0] >> 4) & 0x01; 3200 bool uapsd = false; 3201 3202 switch (aci) { 3203 case 1: /* AC_BK */ 3204 ac = IEEE80211_AC_BK; 3205 if (acm) 3206 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3207 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3208 uapsd = true; 3209 params[ac].mu_edca = !!mu_edca; 3210 if (mu_edca) 3211 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3212 break; 3213 case 2: /* AC_VI */ 3214 ac = IEEE80211_AC_VI; 3215 if (acm) 3216 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3217 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3218 uapsd = true; 3219 params[ac].mu_edca = !!mu_edca; 3220 if (mu_edca) 3221 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3222 break; 3223 case 3: /* AC_VO */ 3224 ac = IEEE80211_AC_VO; 3225 if (acm) 3226 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3227 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3228 uapsd = true; 3229 params[ac].mu_edca = !!mu_edca; 3230 if (mu_edca) 3231 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3232 break; 3233 case 0: /* AC_BE */ 3234 default: 3235 ac = IEEE80211_AC_BE; 3236 if (acm) 3237 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3238 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3239 uapsd = true; 3240 params[ac].mu_edca = !!mu_edca; 3241 if (mu_edca) 3242 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3243 break; 3244 } 3245 3246 params[ac].aifs = pos[0] & 0x0f; 3247 3248 if (params[ac].aifs < 2) { 3249 link_info(link, 3250 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3251 params[ac].aifs, aci); 3252 params[ac].aifs = 2; 3253 } 3254 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3255 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3256 params[ac].txop = get_unaligned_le16(pos + 2); 3257 params[ac].acm = acm; 3258 params[ac].uapsd = uapsd; 3259 3260 if (params[ac].cw_min == 0 || 3261 params[ac].cw_min > params[ac].cw_max) { 3262 link_info(link, 3263 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3264 params[ac].cw_min, params[ac].cw_max, aci); 3265 return false; 3266 } 3267 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3268 } 3269 3270 /* WMM specification requires all 4 ACIs. */ 3271 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3272 if (params[ac].cw_min == 0) { 3273 link_info(link, 3274 "AP has invalid WMM params (missing AC %d), using defaults\n", 3275 ac); 3276 return false; 3277 } 3278 } 3279 3280 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3281 link->tx_conf[ac] = params[ac]; 3282 3283 ieee80211_mgd_set_link_qos_params(link); 3284 3285 /* enable WMM or activate new settings */ 3286 link->conf->qos = true; 3287 return true; 3288 } 3289 3290 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3291 { 3292 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3293 3294 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3295 ieee80211_run_deferred_scan(sdata->local); 3296 } 3297 3298 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3299 { 3300 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3301 3302 __ieee80211_stop_poll(sdata); 3303 } 3304 3305 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3306 u16 capab, bool erp_valid, u8 erp) 3307 { 3308 struct ieee80211_bss_conf *bss_conf = link->conf; 3309 struct ieee80211_supported_band *sband; 3310 u64 changed = 0; 3311 bool use_protection; 3312 bool use_short_preamble; 3313 bool use_short_slot; 3314 3315 sband = ieee80211_get_link_sband(link); 3316 if (!sband) 3317 return changed; 3318 3319 if (erp_valid) { 3320 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3321 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3322 } else { 3323 use_protection = false; 3324 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3325 } 3326 3327 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3328 if (sband->band == NL80211_BAND_5GHZ || 3329 sband->band == NL80211_BAND_6GHZ) 3330 use_short_slot = true; 3331 3332 if (use_protection != bss_conf->use_cts_prot) { 3333 bss_conf->use_cts_prot = use_protection; 3334 changed |= BSS_CHANGED_ERP_CTS_PROT; 3335 } 3336 3337 if (use_short_preamble != bss_conf->use_short_preamble) { 3338 bss_conf->use_short_preamble = use_short_preamble; 3339 changed |= BSS_CHANGED_ERP_PREAMBLE; 3340 } 3341 3342 if (use_short_slot != bss_conf->use_short_slot) { 3343 bss_conf->use_short_slot = use_short_slot; 3344 changed |= BSS_CHANGED_ERP_SLOT; 3345 } 3346 3347 return changed; 3348 } 3349 3350 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3351 struct cfg80211_bss *cbss) 3352 { 3353 struct ieee80211_sub_if_data *sdata = link->sdata; 3354 struct ieee80211_bss_conf *bss_conf = link->conf; 3355 struct ieee80211_bss *bss = (void *)cbss->priv; 3356 u64 changed = BSS_CHANGED_QOS; 3357 3358 /* not really used in MLO */ 3359 sdata->u.mgd.beacon_timeout = 3360 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3361 bss_conf->beacon_int)); 3362 3363 changed |= ieee80211_handle_bss_capability(link, 3364 bss_conf->assoc_capability, 3365 bss->has_erp_value, 3366 bss->erp_value); 3367 3368 ieee80211_check_rate_mask(link); 3369 3370 link->conf->bss = cbss; 3371 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3372 3373 if (sdata->vif.p2p || 3374 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3375 const struct cfg80211_bss_ies *ies; 3376 3377 rcu_read_lock(); 3378 ies = rcu_dereference(cbss->ies); 3379 if (ies) { 3380 int ret; 3381 3382 ret = cfg80211_get_p2p_attr( 3383 ies->data, ies->len, 3384 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3385 (u8 *) &bss_conf->p2p_noa_attr, 3386 sizeof(bss_conf->p2p_noa_attr)); 3387 if (ret >= 2) { 3388 link->u.mgd.p2p_noa_index = 3389 bss_conf->p2p_noa_attr.index; 3390 changed |= BSS_CHANGED_P2P_PS; 3391 } 3392 } 3393 rcu_read_unlock(); 3394 } 3395 3396 if (link->u.mgd.have_beacon) { 3397 bss_conf->beacon_rate = bss->beacon_rate; 3398 changed |= BSS_CHANGED_BEACON_INFO; 3399 } else { 3400 bss_conf->beacon_rate = NULL; 3401 } 3402 3403 /* Tell the driver to monitor connection quality (if supported) */ 3404 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3405 bss_conf->cqm_rssi_thold) 3406 changed |= BSS_CHANGED_CQM; 3407 3408 return changed; 3409 } 3410 3411 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3412 struct ieee80211_mgd_assoc_data *assoc_data, 3413 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3414 { 3415 struct ieee80211_local *local = sdata->local; 3416 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3417 u64 vif_changed = BSS_CHANGED_ASSOC; 3418 unsigned int link_id; 3419 3420 lockdep_assert_wiphy(local->hw.wiphy); 3421 3422 sdata->u.mgd.associated = true; 3423 3424 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3425 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3426 struct ieee80211_link_data *link; 3427 3428 if (!cbss || 3429 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3430 continue; 3431 3432 if (ieee80211_vif_is_mld(&sdata->vif) && 3433 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3434 continue; 3435 3436 link = sdata_dereference(sdata->link[link_id], sdata); 3437 if (WARN_ON(!link)) 3438 return; 3439 3440 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3441 } 3442 3443 /* just to be sure */ 3444 ieee80211_stop_poll(sdata); 3445 3446 ieee80211_led_assoc(local, 1); 3447 3448 vif_cfg->assoc = 1; 3449 3450 /* Enable ARP filtering */ 3451 if (vif_cfg->arp_addr_cnt) 3452 vif_changed |= BSS_CHANGED_ARP_FILTER; 3453 3454 if (ieee80211_vif_is_mld(&sdata->vif)) { 3455 for (link_id = 0; 3456 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3457 link_id++) { 3458 struct ieee80211_link_data *link; 3459 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3460 3461 if (!cbss || 3462 !(BIT(link_id) & 3463 ieee80211_vif_usable_links(&sdata->vif)) || 3464 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3465 continue; 3466 3467 link = sdata_dereference(sdata->link[link_id], sdata); 3468 if (WARN_ON(!link)) 3469 return; 3470 3471 ieee80211_link_info_change_notify(sdata, link, 3472 changed[link_id]); 3473 3474 ieee80211_recalc_smps(sdata, link); 3475 } 3476 3477 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3478 } else { 3479 ieee80211_bss_info_change_notify(sdata, 3480 vif_changed | changed[0]); 3481 } 3482 3483 ieee80211_recalc_ps(local); 3484 3485 /* leave this here to not change ordering in non-MLO cases */ 3486 if (!ieee80211_vif_is_mld(&sdata->vif)) 3487 ieee80211_recalc_smps(sdata, &sdata->deflink); 3488 ieee80211_recalc_ps_vif(sdata); 3489 3490 netif_carrier_on(sdata->dev); 3491 } 3492 3493 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3494 u16 stype, u16 reason, bool tx, 3495 u8 *frame_buf) 3496 { 3497 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3498 struct ieee80211_local *local = sdata->local; 3499 unsigned int link_id; 3500 u64 changed = 0; 3501 struct ieee80211_prep_tx_info info = { 3502 .subtype = stype, 3503 }; 3504 3505 lockdep_assert_wiphy(local->hw.wiphy); 3506 3507 if (WARN_ON_ONCE(tx && !frame_buf)) 3508 return; 3509 3510 if (WARN_ON(!ifmgd->associated)) 3511 return; 3512 3513 ieee80211_stop_poll(sdata); 3514 3515 ifmgd->associated = false; 3516 3517 /* other links will be destroyed */ 3518 sdata->deflink.conf->bss = NULL; 3519 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3520 3521 netif_carrier_off(sdata->dev); 3522 3523 /* 3524 * if we want to get out of ps before disassoc (why?) we have 3525 * to do it before sending disassoc, as otherwise the null-packet 3526 * won't be valid. 3527 */ 3528 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3529 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3530 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3531 } 3532 local->ps_sdata = NULL; 3533 3534 /* disable per-vif ps */ 3535 ieee80211_recalc_ps_vif(sdata); 3536 3537 /* make sure ongoing transmission finishes */ 3538 synchronize_net(); 3539 3540 /* 3541 * drop any frame before deauth/disassoc, this can be data or 3542 * management frame. Since we are disconnecting, we should not 3543 * insist sending these frames which can take time and delay 3544 * the disconnection and possible the roaming. 3545 */ 3546 if (tx) 3547 ieee80211_flush_queues(local, sdata, true); 3548 3549 /* deauthenticate/disassociate now */ 3550 if (tx || frame_buf) { 3551 /* 3552 * In multi channel scenarios guarantee that the virtual 3553 * interface is granted immediate airtime to transmit the 3554 * deauthentication frame by calling mgd_prepare_tx, if the 3555 * driver requested so. 3556 */ 3557 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 3558 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 3559 link_id++) { 3560 struct ieee80211_link_data *link; 3561 3562 link = sdata_dereference(sdata->link[link_id], 3563 sdata); 3564 if (!link) 3565 continue; 3566 if (link->u.mgd.have_beacon) 3567 break; 3568 } 3569 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 3570 info.link_id = ffs(sdata->vif.active_links) - 1; 3571 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3572 } 3573 } 3574 3575 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3576 sdata->vif.cfg.ap_addr, stype, 3577 reason, tx, frame_buf); 3578 } 3579 3580 /* flush out frame - make sure the deauth was actually sent */ 3581 if (tx) 3582 ieee80211_flush_queues(local, sdata, false); 3583 3584 drv_mgd_complete_tx(sdata->local, sdata, &info); 3585 3586 /* clear AP addr only after building the needed mgmt frames */ 3587 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3588 eth_zero_addr(sdata->vif.cfg.ap_addr); 3589 3590 sdata->vif.cfg.ssid_len = 0; 3591 3592 /* remove AP and TDLS peers */ 3593 sta_info_flush(sdata, -1); 3594 3595 /* finally reset all BSS / config parameters */ 3596 if (!ieee80211_vif_is_mld(&sdata->vif)) 3597 changed |= ieee80211_reset_erp_info(sdata); 3598 3599 ieee80211_led_assoc(local, 0); 3600 changed |= BSS_CHANGED_ASSOC; 3601 sdata->vif.cfg.assoc = false; 3602 3603 sdata->deflink.u.mgd.p2p_noa_index = -1; 3604 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3605 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3606 3607 /* on the next assoc, re-program HT/VHT parameters */ 3608 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3609 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3610 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3611 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3612 3613 /* 3614 * reset MU-MIMO ownership and group data in default link, 3615 * if used, other links are destroyed 3616 */ 3617 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3618 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3619 memset(sdata->vif.bss_conf.mu_group.position, 0, 3620 sizeof(sdata->vif.bss_conf.mu_group.position)); 3621 if (!ieee80211_vif_is_mld(&sdata->vif)) 3622 changed |= BSS_CHANGED_MU_GROUPS; 3623 sdata->vif.bss_conf.mu_mimo_owner = false; 3624 3625 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3626 3627 del_timer_sync(&local->dynamic_ps_timer); 3628 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3629 3630 /* Disable ARP filtering */ 3631 if (sdata->vif.cfg.arp_addr_cnt) 3632 changed |= BSS_CHANGED_ARP_FILTER; 3633 3634 sdata->vif.bss_conf.qos = false; 3635 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3636 changed |= BSS_CHANGED_QOS; 3637 /* The BSSID (not really interesting) and HT changed */ 3638 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3639 ieee80211_bss_info_change_notify(sdata, changed); 3640 } else { 3641 ieee80211_vif_cfg_change_notify(sdata, changed); 3642 } 3643 3644 /* disassociated - set to defaults now */ 3645 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3646 3647 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3648 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3649 del_timer_sync(&sdata->u.mgd.timer); 3650 3651 sdata->vif.bss_conf.dtim_period = 0; 3652 sdata->vif.bss_conf.beacon_rate = NULL; 3653 3654 sdata->deflink.u.mgd.have_beacon = false; 3655 sdata->deflink.u.mgd.tracking_signal_avg = false; 3656 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3657 3658 ifmgd->flags = 0; 3659 3660 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3661 struct ieee80211_link_data *link; 3662 3663 link = sdata_dereference(sdata->link[link_id], sdata); 3664 if (!link) 3665 continue; 3666 ieee80211_link_release_channel(link); 3667 } 3668 3669 sdata->vif.bss_conf.csa_active = false; 3670 sdata->deflink.u.mgd.csa.blocked_tx = false; 3671 sdata->deflink.u.mgd.csa.waiting_bcn = false; 3672 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 3673 if (sdata->csa_blocked_queues) { 3674 ieee80211_wake_vif_queues(local, sdata, 3675 IEEE80211_QUEUE_STOP_REASON_CSA); 3676 sdata->csa_blocked_queues = false; 3677 } 3678 3679 /* existing TX TSPEC sessions no longer exist */ 3680 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3681 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3682 3683 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3684 sdata->vif.bss_conf.pwr_reduction = 0; 3685 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3686 3687 sdata->vif.cfg.eml_cap = 0; 3688 sdata->vif.cfg.eml_med_sync_delay = 0; 3689 sdata->vif.cfg.mld_capa_op = 0; 3690 3691 memset(&sdata->u.mgd.ttlm_info, 0, 3692 sizeof(sdata->u.mgd.ttlm_info)); 3693 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3694 3695 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 3696 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3697 &ifmgd->neg_ttlm_timeout_work); 3698 3699 sdata->u.mgd.removed_links = 0; 3700 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3701 &sdata->u.mgd.ml_reconf_work); 3702 3703 wiphy_work_cancel(sdata->local->hw.wiphy, 3704 &ifmgd->teardown_ttlm_work); 3705 3706 ieee80211_vif_set_links(sdata, 0, 0); 3707 3708 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3709 } 3710 3711 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3712 { 3713 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3714 struct ieee80211_local *local = sdata->local; 3715 3716 lockdep_assert_wiphy(local->hw.wiphy); 3717 3718 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3719 return; 3720 3721 __ieee80211_stop_poll(sdata); 3722 3723 ieee80211_recalc_ps(local); 3724 3725 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3726 return; 3727 3728 /* 3729 * We've received a probe response, but are not sure whether 3730 * we have or will be receiving any beacons or data, so let's 3731 * schedule the timers again, just in case. 3732 */ 3733 ieee80211_sta_reset_beacon_monitor(sdata); 3734 3735 mod_timer(&ifmgd->conn_mon_timer, 3736 round_jiffies_up(jiffies + 3737 IEEE80211_CONNECTION_IDLE_TIME)); 3738 } 3739 3740 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3741 struct ieee80211_hdr *hdr, 3742 u16 tx_time) 3743 { 3744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3745 u16 tid; 3746 int ac; 3747 struct ieee80211_sta_tx_tspec *tx_tspec; 3748 unsigned long now = jiffies; 3749 3750 if (!ieee80211_is_data_qos(hdr->frame_control)) 3751 return; 3752 3753 tid = ieee80211_get_tid(hdr); 3754 ac = ieee80211_ac_from_tid(tid); 3755 tx_tspec = &ifmgd->tx_tspec[ac]; 3756 3757 if (likely(!tx_tspec->admitted_time)) 3758 return; 3759 3760 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3761 tx_tspec->consumed_tx_time = 0; 3762 tx_tspec->time_slice_start = now; 3763 3764 if (tx_tspec->downgraded) { 3765 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3766 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3767 &ifmgd->tx_tspec_wk, 0); 3768 } 3769 } 3770 3771 if (tx_tspec->downgraded) 3772 return; 3773 3774 tx_tspec->consumed_tx_time += tx_time; 3775 3776 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3777 tx_tspec->downgraded = true; 3778 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3779 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3780 &ifmgd->tx_tspec_wk, 0); 3781 } 3782 } 3783 3784 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3785 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3786 { 3787 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3788 3789 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3790 !sdata->u.mgd.probe_send_count) 3791 return; 3792 3793 if (ack) 3794 sdata->u.mgd.probe_send_count = 0; 3795 else 3796 sdata->u.mgd.nullfunc_failed = true; 3797 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3798 } 3799 3800 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3801 const u8 *src, const u8 *dst, 3802 const u8 *ssid, size_t ssid_len, 3803 struct ieee80211_channel *channel) 3804 { 3805 struct sk_buff *skb; 3806 3807 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3808 ssid, ssid_len, NULL, 0, 3809 IEEE80211_PROBE_FLAG_DIRECTED); 3810 if (skb) 3811 ieee80211_tx_skb(sdata, skb); 3812 } 3813 3814 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3815 { 3816 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3817 u8 *dst = sdata->vif.cfg.ap_addr; 3818 u8 unicast_limit = max(1, max_probe_tries - 3); 3819 struct sta_info *sta; 3820 3821 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3822 3823 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3824 return; 3825 3826 /* 3827 * Try sending broadcast probe requests for the last three 3828 * probe requests after the first ones failed since some 3829 * buggy APs only support broadcast probe requests. 3830 */ 3831 if (ifmgd->probe_send_count >= unicast_limit) 3832 dst = NULL; 3833 3834 /* 3835 * When the hardware reports an accurate Tx ACK status, it's 3836 * better to send a nullfunc frame instead of a probe request, 3837 * as it will kick us off the AP quickly if we aren't associated 3838 * anymore. The timeout will be reset if the frame is ACKed by 3839 * the AP. 3840 */ 3841 ifmgd->probe_send_count++; 3842 3843 if (dst) { 3844 sta = sta_info_get(sdata, dst); 3845 if (!WARN_ON(!sta)) 3846 ieee80211_check_fast_rx(sta); 3847 } 3848 3849 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3850 ifmgd->nullfunc_failed = false; 3851 ieee80211_send_nullfunc(sdata->local, sdata, false); 3852 } else { 3853 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3854 sdata->vif.cfg.ssid, 3855 sdata->vif.cfg.ssid_len, 3856 sdata->deflink.conf->bss->channel); 3857 } 3858 3859 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3860 run_again(sdata, ifmgd->probe_timeout); 3861 } 3862 3863 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3864 bool beacon) 3865 { 3866 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3867 bool already = false; 3868 3869 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3870 3871 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3872 return; 3873 3874 if (!ieee80211_sdata_running(sdata)) 3875 return; 3876 3877 if (!ifmgd->associated) 3878 return; 3879 3880 if (sdata->local->tmp_channel || sdata->local->scanning) 3881 return; 3882 3883 if (sdata->local->suspending) { 3884 /* reschedule after resume */ 3885 ieee80211_reset_ap_probe(sdata); 3886 return; 3887 } 3888 3889 if (beacon) { 3890 mlme_dbg_ratelimited(sdata, 3891 "detected beacon loss from AP (missed %d beacons) - probing\n", 3892 beacon_loss_count); 3893 3894 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3895 } 3896 3897 /* 3898 * The driver/our work has already reported this event or the 3899 * connection monitoring has kicked in and we have already sent 3900 * a probe request. Or maybe the AP died and the driver keeps 3901 * reporting until we disassociate... 3902 * 3903 * In either case we have to ignore the current call to this 3904 * function (except for setting the correct probe reason bit) 3905 * because otherwise we would reset the timer every time and 3906 * never check whether we received a probe response! 3907 */ 3908 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3909 already = true; 3910 3911 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3912 3913 if (already) 3914 return; 3915 3916 ieee80211_recalc_ps(sdata->local); 3917 3918 ifmgd->probe_send_count = 0; 3919 ieee80211_mgd_probe_ap_send(sdata); 3920 } 3921 3922 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3923 struct ieee80211_vif *vif) 3924 { 3925 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3926 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3927 struct cfg80211_bss *cbss; 3928 struct sk_buff *skb; 3929 const struct element *ssid; 3930 int ssid_len; 3931 3932 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3933 3934 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3935 ieee80211_vif_is_mld(&sdata->vif))) 3936 return NULL; 3937 3938 if (ifmgd->associated) 3939 cbss = sdata->deflink.conf->bss; 3940 else if (ifmgd->auth_data) 3941 cbss = ifmgd->auth_data->bss; 3942 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3943 cbss = ifmgd->assoc_data->link[0].bss; 3944 else 3945 return NULL; 3946 3947 rcu_read_lock(); 3948 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3949 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3950 "invalid SSID element (len=%d)", 3951 ssid ? ssid->datalen : -1)) 3952 ssid_len = 0; 3953 else 3954 ssid_len = ssid->datalen; 3955 3956 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3957 (u32) -1, cbss->channel, 3958 ssid->data, ssid_len, 3959 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3960 rcu_read_unlock(); 3961 3962 return skb; 3963 } 3964 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3965 3966 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3967 const u8 *buf, size_t len, bool tx, 3968 u16 reason, bool reconnect) 3969 { 3970 struct ieee80211_event event = { 3971 .type = MLME_EVENT, 3972 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3973 .u.mlme.reason = reason, 3974 }; 3975 3976 if (tx) 3977 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3978 else 3979 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3980 3981 drv_event_callback(sdata->local, sdata, &event); 3982 } 3983 3984 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3985 { 3986 struct ieee80211_local *local = sdata->local; 3987 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3988 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3989 bool tx = false; 3990 3991 lockdep_assert_wiphy(local->hw.wiphy); 3992 3993 if (!ifmgd->associated) 3994 return; 3995 3996 /* only transmit if we have a link that makes that worthwhile */ 3997 for (unsigned int link_id = 0; 3998 link_id < ARRAY_SIZE(sdata->link); 3999 link_id++) { 4000 struct ieee80211_link_data *link; 4001 4002 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4003 continue; 4004 4005 link = sdata_dereference(sdata->link[link_id], sdata); 4006 if (WARN_ON_ONCE(!link)) 4007 continue; 4008 4009 if (link->u.mgd.csa.blocked_tx) 4010 continue; 4011 4012 tx = true; 4013 break; 4014 } 4015 4016 if (!ifmgd->driver_disconnect) { 4017 unsigned int link_id; 4018 4019 /* 4020 * AP is probably out of range (or not reachable for another 4021 * reason) so remove the bss structs for that AP. In the case 4022 * of multi-link, it's not clear that all of them really are 4023 * out of range, but if they weren't the driver likely would 4024 * have switched to just have a single link active? 4025 */ 4026 for (link_id = 0; 4027 link_id < ARRAY_SIZE(sdata->link); 4028 link_id++) { 4029 struct ieee80211_link_data *link; 4030 4031 link = sdata_dereference(sdata->link[link_id], sdata); 4032 if (!link) 4033 continue; 4034 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4035 link->conf->bss = NULL; 4036 } 4037 } 4038 4039 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4040 ifmgd->driver_disconnect ? 4041 WLAN_REASON_DEAUTH_LEAVING : 4042 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4043 tx, frame_buf); 4044 /* the other links will be destroyed */ 4045 sdata->vif.bss_conf.csa_active = false; 4046 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4047 sdata->deflink.u.mgd.csa.blocked_tx = false; 4048 if (sdata->csa_blocked_queues) { 4049 ieee80211_wake_vif_queues(local, sdata, 4050 IEEE80211_QUEUE_STOP_REASON_CSA); 4051 sdata->csa_blocked_queues = false; 4052 } 4053 4054 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 4055 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4056 ifmgd->reconnect); 4057 ifmgd->reconnect = false; 4058 } 4059 4060 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4061 struct wiphy_work *work) 4062 { 4063 struct ieee80211_sub_if_data *sdata = 4064 container_of(work, struct ieee80211_sub_if_data, 4065 u.mgd.beacon_connection_loss_work); 4066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4067 4068 if (ifmgd->connection_loss) { 4069 sdata_info(sdata, "Connection to AP %pM lost\n", 4070 sdata->vif.cfg.ap_addr); 4071 __ieee80211_disconnect(sdata); 4072 ifmgd->connection_loss = false; 4073 } else if (ifmgd->driver_disconnect) { 4074 sdata_info(sdata, 4075 "Driver requested disconnection from AP %pM\n", 4076 sdata->vif.cfg.ap_addr); 4077 __ieee80211_disconnect(sdata); 4078 ifmgd->driver_disconnect = false; 4079 } else { 4080 if (ifmgd->associated) 4081 sdata->deflink.u.mgd.beacon_loss_count++; 4082 ieee80211_mgd_probe_ap(sdata, true); 4083 } 4084 } 4085 4086 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4087 struct wiphy_work *work) 4088 { 4089 struct ieee80211_sub_if_data *sdata = 4090 container_of(work, struct ieee80211_sub_if_data, 4091 u.mgd.csa_connection_drop_work); 4092 4093 __ieee80211_disconnect(sdata); 4094 } 4095 4096 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4097 { 4098 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4099 struct ieee80211_hw *hw = &sdata->local->hw; 4100 4101 trace_api_beacon_loss(sdata); 4102 4103 sdata->u.mgd.connection_loss = false; 4104 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4105 } 4106 EXPORT_SYMBOL(ieee80211_beacon_loss); 4107 4108 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4109 { 4110 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4111 struct ieee80211_hw *hw = &sdata->local->hw; 4112 4113 trace_api_connection_loss(sdata); 4114 4115 sdata->u.mgd.connection_loss = true; 4116 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4117 } 4118 EXPORT_SYMBOL(ieee80211_connection_loss); 4119 4120 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4121 { 4122 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4123 struct ieee80211_hw *hw = &sdata->local->hw; 4124 4125 trace_api_disconnect(sdata, reconnect); 4126 4127 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4128 return; 4129 4130 sdata->u.mgd.driver_disconnect = true; 4131 sdata->u.mgd.reconnect = reconnect; 4132 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4133 } 4134 EXPORT_SYMBOL(ieee80211_disconnect); 4135 4136 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4137 bool assoc) 4138 { 4139 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4140 4141 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4142 4143 if (!assoc) { 4144 /* 4145 * we are not authenticated yet, the only timer that could be 4146 * running is the timeout for the authentication response which 4147 * which is not relevant anymore. 4148 */ 4149 del_timer_sync(&sdata->u.mgd.timer); 4150 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4151 4152 /* other links are destroyed */ 4153 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4154 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4155 BSS_CHANGED_BSSID); 4156 sdata->u.mgd.flags = 0; 4157 4158 ieee80211_link_release_channel(&sdata->deflink); 4159 ieee80211_vif_set_links(sdata, 0, 0); 4160 } 4161 4162 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4163 kfree(auth_data); 4164 sdata->u.mgd.auth_data = NULL; 4165 } 4166 4167 enum assoc_status { 4168 ASSOC_SUCCESS, 4169 ASSOC_REJECTED, 4170 ASSOC_TIMEOUT, 4171 ASSOC_ABANDON, 4172 }; 4173 4174 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4175 enum assoc_status status) 4176 { 4177 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4178 4179 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4180 4181 if (status != ASSOC_SUCCESS) { 4182 /* 4183 * we are not associated yet, the only timer that could be 4184 * running is the timeout for the association response which 4185 * which is not relevant anymore. 4186 */ 4187 del_timer_sync(&sdata->u.mgd.timer); 4188 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4189 4190 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4191 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4192 BSS_CHANGED_BSSID); 4193 sdata->u.mgd.flags = 0; 4194 sdata->vif.bss_conf.mu_mimo_owner = false; 4195 4196 if (status != ASSOC_REJECTED) { 4197 struct cfg80211_assoc_failure data = { 4198 .timeout = status == ASSOC_TIMEOUT, 4199 }; 4200 int i; 4201 4202 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4203 ARRAY_SIZE(assoc_data->link)); 4204 4205 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4206 data.bss[i] = assoc_data->link[i].bss; 4207 4208 if (ieee80211_vif_is_mld(&sdata->vif)) 4209 data.ap_mld_addr = assoc_data->ap_addr; 4210 4211 cfg80211_assoc_failure(sdata->dev, &data); 4212 } 4213 4214 ieee80211_link_release_channel(&sdata->deflink); 4215 ieee80211_vif_set_links(sdata, 0, 0); 4216 } 4217 4218 kfree(assoc_data); 4219 sdata->u.mgd.assoc_data = NULL; 4220 } 4221 4222 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4223 struct ieee80211_mgmt *mgmt, size_t len) 4224 { 4225 struct ieee80211_local *local = sdata->local; 4226 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4227 const struct element *challenge; 4228 u8 *pos; 4229 u32 tx_flags = 0; 4230 struct ieee80211_prep_tx_info info = { 4231 .subtype = IEEE80211_STYPE_AUTH, 4232 .link_id = auth_data->link_id, 4233 }; 4234 4235 pos = mgmt->u.auth.variable; 4236 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4237 len - (pos - (u8 *)mgmt)); 4238 if (!challenge) 4239 return; 4240 auth_data->expected_transaction = 4; 4241 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4242 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4243 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4244 IEEE80211_TX_INTFL_MLME_CONN_TX; 4245 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4246 (void *)challenge, 4247 challenge->datalen + sizeof(*challenge), 4248 auth_data->ap_addr, auth_data->ap_addr, 4249 auth_data->key, auth_data->key_len, 4250 auth_data->key_idx, tx_flags); 4251 } 4252 4253 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4254 { 4255 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4256 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4257 struct sta_info *sta; 4258 4259 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4260 4261 sdata_info(sdata, "authenticated\n"); 4262 ifmgd->auth_data->done = true; 4263 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4264 ifmgd->auth_data->timeout_started = true; 4265 run_again(sdata, ifmgd->auth_data->timeout); 4266 4267 /* move station state to auth */ 4268 sta = sta_info_get(sdata, ap_addr); 4269 if (!sta) { 4270 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4271 return false; 4272 } 4273 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4274 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4275 return false; 4276 } 4277 4278 return true; 4279 } 4280 4281 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4282 struct ieee80211_mgmt *mgmt, size_t len) 4283 { 4284 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4285 u16 auth_alg, auth_transaction, status_code; 4286 struct ieee80211_event event = { 4287 .type = MLME_EVENT, 4288 .u.mlme.data = AUTH_EVENT, 4289 }; 4290 struct ieee80211_prep_tx_info info = { 4291 .subtype = IEEE80211_STYPE_AUTH, 4292 }; 4293 4294 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4295 4296 if (len < 24 + 6) 4297 return; 4298 4299 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4300 return; 4301 4302 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4303 return; 4304 4305 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4306 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4307 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4308 4309 if (auth_alg != ifmgd->auth_data->algorithm || 4310 (auth_alg != WLAN_AUTH_SAE && 4311 auth_transaction != ifmgd->auth_data->expected_transaction) || 4312 (auth_alg == WLAN_AUTH_SAE && 4313 (auth_transaction < ifmgd->auth_data->expected_transaction || 4314 auth_transaction > 2))) { 4315 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4316 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4317 auth_transaction, 4318 ifmgd->auth_data->expected_transaction); 4319 goto notify_driver; 4320 } 4321 4322 if (status_code != WLAN_STATUS_SUCCESS) { 4323 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4324 4325 if (auth_alg == WLAN_AUTH_SAE && 4326 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4327 (auth_transaction == 1 && 4328 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4329 status_code == WLAN_STATUS_SAE_PK)))) { 4330 /* waiting for userspace now */ 4331 ifmgd->auth_data->waiting = true; 4332 ifmgd->auth_data->timeout = 4333 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4334 ifmgd->auth_data->timeout_started = true; 4335 run_again(sdata, ifmgd->auth_data->timeout); 4336 goto notify_driver; 4337 } 4338 4339 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4340 mgmt->sa, status_code); 4341 ieee80211_destroy_auth_data(sdata, false); 4342 event.u.mlme.status = MLME_DENIED; 4343 event.u.mlme.reason = status_code; 4344 drv_event_callback(sdata->local, sdata, &event); 4345 goto notify_driver; 4346 } 4347 4348 switch (ifmgd->auth_data->algorithm) { 4349 case WLAN_AUTH_OPEN: 4350 case WLAN_AUTH_LEAP: 4351 case WLAN_AUTH_FT: 4352 case WLAN_AUTH_SAE: 4353 case WLAN_AUTH_FILS_SK: 4354 case WLAN_AUTH_FILS_SK_PFS: 4355 case WLAN_AUTH_FILS_PK: 4356 break; 4357 case WLAN_AUTH_SHARED_KEY: 4358 if (ifmgd->auth_data->expected_transaction != 4) { 4359 ieee80211_auth_challenge(sdata, mgmt, len); 4360 /* need another frame */ 4361 return; 4362 } 4363 break; 4364 default: 4365 WARN_ONCE(1, "invalid auth alg %d", 4366 ifmgd->auth_data->algorithm); 4367 goto notify_driver; 4368 } 4369 4370 event.u.mlme.status = MLME_SUCCESS; 4371 info.success = 1; 4372 drv_event_callback(sdata->local, sdata, &event); 4373 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4374 (auth_transaction == 2 && 4375 ifmgd->auth_data->expected_transaction == 2)) { 4376 if (!ieee80211_mark_sta_auth(sdata)) 4377 return; /* ignore frame -- wait for timeout */ 4378 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4379 auth_transaction == 2) { 4380 sdata_info(sdata, "SAE peer confirmed\n"); 4381 ifmgd->auth_data->peer_confirmed = true; 4382 } 4383 4384 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4385 notify_driver: 4386 drv_mgd_complete_tx(sdata->local, sdata, &info); 4387 } 4388 4389 #define case_WLAN(type) \ 4390 case WLAN_REASON_##type: return #type 4391 4392 const char *ieee80211_get_reason_code_string(u16 reason_code) 4393 { 4394 switch (reason_code) { 4395 case_WLAN(UNSPECIFIED); 4396 case_WLAN(PREV_AUTH_NOT_VALID); 4397 case_WLAN(DEAUTH_LEAVING); 4398 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4399 case_WLAN(DISASSOC_AP_BUSY); 4400 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4401 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4402 case_WLAN(DISASSOC_STA_HAS_LEFT); 4403 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4404 case_WLAN(DISASSOC_BAD_POWER); 4405 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4406 case_WLAN(INVALID_IE); 4407 case_WLAN(MIC_FAILURE); 4408 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4409 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4410 case_WLAN(IE_DIFFERENT); 4411 case_WLAN(INVALID_GROUP_CIPHER); 4412 case_WLAN(INVALID_PAIRWISE_CIPHER); 4413 case_WLAN(INVALID_AKMP); 4414 case_WLAN(UNSUPP_RSN_VERSION); 4415 case_WLAN(INVALID_RSN_IE_CAP); 4416 case_WLAN(IEEE8021X_FAILED); 4417 case_WLAN(CIPHER_SUITE_REJECTED); 4418 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4419 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4420 case_WLAN(DISASSOC_LOW_ACK); 4421 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4422 case_WLAN(QSTA_LEAVE_QBSS); 4423 case_WLAN(QSTA_NOT_USE); 4424 case_WLAN(QSTA_REQUIRE_SETUP); 4425 case_WLAN(QSTA_TIMEOUT); 4426 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4427 case_WLAN(MESH_PEER_CANCELED); 4428 case_WLAN(MESH_MAX_PEERS); 4429 case_WLAN(MESH_CONFIG); 4430 case_WLAN(MESH_CLOSE); 4431 case_WLAN(MESH_MAX_RETRIES); 4432 case_WLAN(MESH_CONFIRM_TIMEOUT); 4433 case_WLAN(MESH_INVALID_GTK); 4434 case_WLAN(MESH_INCONSISTENT_PARAM); 4435 case_WLAN(MESH_INVALID_SECURITY); 4436 case_WLAN(MESH_PATH_ERROR); 4437 case_WLAN(MESH_PATH_NOFORWARD); 4438 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4439 case_WLAN(MAC_EXISTS_IN_MBSS); 4440 case_WLAN(MESH_CHAN_REGULATORY); 4441 case_WLAN(MESH_CHAN); 4442 default: return "<unknown>"; 4443 } 4444 } 4445 4446 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4447 struct ieee80211_mgmt *mgmt, size_t len) 4448 { 4449 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4450 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4451 4452 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4453 4454 if (len < 24 + 2) 4455 return; 4456 4457 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4458 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4459 return; 4460 } 4461 4462 if (ifmgd->associated && 4463 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4464 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4465 sdata->vif.cfg.ap_addr, reason_code, 4466 ieee80211_get_reason_code_string(reason_code)); 4467 4468 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4469 4470 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4471 reason_code, false); 4472 return; 4473 } 4474 4475 if (ifmgd->assoc_data && 4476 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4477 sdata_info(sdata, 4478 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4479 ifmgd->assoc_data->ap_addr, reason_code, 4480 ieee80211_get_reason_code_string(reason_code)); 4481 4482 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4483 4484 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4485 return; 4486 } 4487 } 4488 4489 4490 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4491 struct ieee80211_mgmt *mgmt, size_t len) 4492 { 4493 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4494 u16 reason_code; 4495 4496 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4497 4498 if (len < 24 + 2) 4499 return; 4500 4501 if (!ifmgd->associated || 4502 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4503 return; 4504 4505 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4506 4507 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4508 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4509 return; 4510 } 4511 4512 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4513 sdata->vif.cfg.ap_addr, reason_code, 4514 ieee80211_get_reason_code_string(reason_code)); 4515 4516 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4517 4518 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4519 false); 4520 } 4521 4522 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4523 u8 *supp_rates, unsigned int supp_rates_len, 4524 u32 *rates, u32 *basic_rates, 4525 bool *have_higher_than_11mbit, 4526 int *min_rate, int *min_rate_index) 4527 { 4528 int i, j; 4529 4530 for (i = 0; i < supp_rates_len; i++) { 4531 int rate = supp_rates[i] & 0x7f; 4532 bool is_basic = !!(supp_rates[i] & 0x80); 4533 4534 if ((rate * 5) > 110) 4535 *have_higher_than_11mbit = true; 4536 4537 /* 4538 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4539 * selectors since they're not rates. 4540 * 4541 * Note: Even though the membership selector and the basic 4542 * rate flag share the same bit, they are not exactly 4543 * the same. 4544 */ 4545 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4546 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4547 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4548 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4549 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4550 continue; 4551 4552 for (j = 0; j < sband->n_bitrates; j++) { 4553 struct ieee80211_rate *br; 4554 int brate; 4555 4556 br = &sband->bitrates[j]; 4557 4558 brate = DIV_ROUND_UP(br->bitrate, 5); 4559 if (brate == rate) { 4560 *rates |= BIT(j); 4561 if (is_basic) 4562 *basic_rates |= BIT(j); 4563 if ((rate * 5) < *min_rate) { 4564 *min_rate = rate * 5; 4565 *min_rate_index = j; 4566 } 4567 break; 4568 } 4569 } 4570 } 4571 } 4572 4573 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4574 struct ieee80211_supported_band *sband, 4575 const struct link_sta_info *link_sta, 4576 const struct ieee802_11_elems *elems) 4577 { 4578 const struct ieee80211_sta_he_cap *own_he_cap = 4579 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4580 4581 if (elems->ext_capab_len < 10) 4582 return false; 4583 4584 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4585 return false; 4586 4587 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4588 IEEE80211_HE_MAC_CAP0_TWT_RES && 4589 own_he_cap && 4590 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4591 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4592 } 4593 4594 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4595 struct ieee80211_supported_band *sband, 4596 struct ieee80211_link_data *link, 4597 struct link_sta_info *link_sta, 4598 struct ieee802_11_elems *elems) 4599 { 4600 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4601 4602 if (link->conf->twt_requester != twt) { 4603 link->conf->twt_requester = twt; 4604 return BSS_CHANGED_TWT; 4605 } 4606 return 0; 4607 } 4608 4609 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4610 struct ieee80211_bss_conf *bss_conf, 4611 struct ieee80211_supported_band *sband, 4612 struct link_sta_info *link_sta) 4613 { 4614 const struct ieee80211_sta_he_cap *own_he_cap = 4615 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4616 4617 return bss_conf->he_support && 4618 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4619 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4620 own_he_cap && 4621 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4622 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4623 } 4624 4625 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4626 struct link_sta_info *link_sta, 4627 struct cfg80211_bss *cbss, 4628 struct ieee80211_mgmt *mgmt, 4629 const u8 *elem_start, 4630 unsigned int elem_len, 4631 u64 *changed) 4632 { 4633 struct ieee80211_sub_if_data *sdata = link->sdata; 4634 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4635 struct ieee80211_bss_conf *bss_conf = link->conf; 4636 struct ieee80211_local *local = sdata->local; 4637 unsigned int link_id = link->link_id; 4638 struct ieee80211_elems_parse_params parse_params = { 4639 .mode = link->u.mgd.conn.mode, 4640 .start = elem_start, 4641 .len = elem_len, 4642 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4643 .from_ap = true, 4644 }; 4645 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4646 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4647 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4648 const struct cfg80211_bss_ies *bss_ies = NULL; 4649 struct ieee80211_supported_band *sband; 4650 struct ieee802_11_elems *elems; 4651 const __le16 prof_bss_param_ch_present = 4652 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4653 u16 capab_info; 4654 bool ret; 4655 4656 elems = ieee802_11_parse_elems_full(&parse_params); 4657 if (!elems) 4658 return false; 4659 4660 if (link_id == assoc_data->assoc_link_id) { 4661 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4662 4663 /* 4664 * we should not get to this flow unless the association was 4665 * successful, so set the status directly to success 4666 */ 4667 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4668 if (elems->ml_basic) { 4669 int bss_param_ch_cnt = 4670 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4671 4672 if (bss_param_ch_cnt < 0) { 4673 ret = false; 4674 goto out; 4675 } 4676 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; 4677 } 4678 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4679 !elems->prof || 4680 !(elems->prof->control & prof_bss_param_ch_present)) { 4681 ret = false; 4682 goto out; 4683 } else { 4684 const u8 *ptr = elems->prof->variable + 4685 elems->prof->sta_info_len - 1; 4686 4687 /* 4688 * During parsing, we validated that these fields exist, 4689 * otherwise elems->prof would have been set to NULL. 4690 */ 4691 capab_info = get_unaligned_le16(ptr); 4692 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4693 link->u.mgd.bss_param_ch_cnt = 4694 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4695 4696 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4697 link_info(link, "association response status code=%u\n", 4698 assoc_data->link[link_id].status); 4699 ret = true; 4700 goto out; 4701 } 4702 } 4703 4704 if (!is_s1g && !elems->supp_rates) { 4705 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4706 ret = false; 4707 goto out; 4708 } 4709 4710 link->u.mgd.tdls_chan_switch_prohibited = 4711 elems->ext_capab && elems->ext_capab_len >= 5 && 4712 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4713 4714 /* 4715 * Some APs are erroneously not including some information in their 4716 * (re)association response frames. Try to recover by using the data 4717 * from the beacon or probe response. This seems to afflict mobile 4718 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4719 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4720 */ 4721 if (!is_6ghz && 4722 ((assoc_data->wmm && !elems->wmm_param) || 4723 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4724 (!elems->ht_cap_elem || !elems->ht_operation)) || 4725 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4726 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4727 const struct cfg80211_bss_ies *ies; 4728 struct ieee802_11_elems *bss_elems; 4729 4730 rcu_read_lock(); 4731 ies = rcu_dereference(cbss->ies); 4732 if (ies) 4733 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4734 GFP_ATOMIC); 4735 rcu_read_unlock(); 4736 if (!bss_ies) { 4737 ret = false; 4738 goto out; 4739 } 4740 4741 parse_params.start = bss_ies->data; 4742 parse_params.len = bss_ies->len; 4743 parse_params.bss = cbss; 4744 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4745 if (!bss_elems) { 4746 ret = false; 4747 goto out; 4748 } 4749 4750 if (assoc_data->wmm && 4751 !elems->wmm_param && bss_elems->wmm_param) { 4752 elems->wmm_param = bss_elems->wmm_param; 4753 sdata_info(sdata, 4754 "AP bug: WMM param missing from AssocResp\n"); 4755 } 4756 4757 /* 4758 * Also check if we requested HT/VHT, otherwise the AP doesn't 4759 * have to include the IEs in the (re)association response. 4760 */ 4761 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4762 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4763 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4764 sdata_info(sdata, 4765 "AP bug: HT capability missing from AssocResp\n"); 4766 } 4767 if (!elems->ht_operation && bss_elems->ht_operation && 4768 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4769 elems->ht_operation = bss_elems->ht_operation; 4770 sdata_info(sdata, 4771 "AP bug: HT operation missing from AssocResp\n"); 4772 } 4773 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4774 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4775 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4776 sdata_info(sdata, 4777 "AP bug: VHT capa missing from AssocResp\n"); 4778 } 4779 if (!elems->vht_operation && bss_elems->vht_operation && 4780 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4781 elems->vht_operation = bss_elems->vht_operation; 4782 sdata_info(sdata, 4783 "AP bug: VHT operation missing from AssocResp\n"); 4784 } 4785 4786 kfree(bss_elems); 4787 } 4788 4789 /* 4790 * We previously checked these in the beacon/probe response, so 4791 * they should be present here. This is just a safety net. 4792 * Note that the ieee80211_config_bw() below would also check 4793 * for this (and more), but this has better error reporting. 4794 */ 4795 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4796 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4797 sdata_info(sdata, 4798 "HT AP is missing WMM params or HT capability/operation\n"); 4799 ret = false; 4800 goto out; 4801 } 4802 4803 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4804 (!elems->vht_cap_elem || !elems->vht_operation)) { 4805 sdata_info(sdata, 4806 "VHT AP is missing VHT capability/operation\n"); 4807 ret = false; 4808 goto out; 4809 } 4810 4811 /* check/update if AP changed anything in assoc response vs. scan */ 4812 if (ieee80211_config_bw(link, elems, 4813 link_id == assoc_data->assoc_link_id, 4814 changed)) { 4815 ret = false; 4816 goto out; 4817 } 4818 4819 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4820 ret = false; 4821 goto out; 4822 } 4823 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4824 4825 /* Set up internal HT/VHT capabilities */ 4826 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4827 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4828 elems->ht_cap_elem, 4829 link_sta); 4830 4831 if (elems->vht_cap_elem && 4832 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4833 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4834 const struct cfg80211_bss_ies *ies; 4835 4836 /* 4837 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4838 * too large maximum MPDU length in the association response 4839 * (indicating 12k) that it cannot actually process ... 4840 * Work around that. 4841 */ 4842 rcu_read_lock(); 4843 ies = rcu_dereference(cbss->ies); 4844 if (ies) { 4845 const struct element *elem; 4846 4847 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4848 ies->data, ies->len); 4849 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4850 bss_vht_cap = (const void *)elem->data; 4851 } 4852 4853 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4854 elems->vht_cap_elem, 4855 bss_vht_cap, link_sta); 4856 rcu_read_unlock(); 4857 } 4858 4859 if (elems->he_operation && 4860 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4861 elems->he_cap) { 4862 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4863 elems->he_cap, 4864 elems->he_cap_len, 4865 elems->he_6ghz_capa, 4866 link_sta); 4867 4868 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4869 if (elems->rsnx && elems->rsnx_len && 4870 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4871 wiphy_ext_feature_isset(local->hw.wiphy, 4872 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4873 bss_conf->twt_protected = true; 4874 else 4875 bss_conf->twt_protected = false; 4876 4877 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4878 link_sta, elems); 4879 4880 if (elems->eht_operation && elems->eht_cap && 4881 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4882 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4883 elems->he_cap, 4884 elems->he_cap_len, 4885 elems->eht_cap, 4886 elems->eht_cap_len, 4887 link_sta); 4888 4889 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4890 } else { 4891 bss_conf->eht_support = false; 4892 } 4893 } else { 4894 bss_conf->he_support = false; 4895 bss_conf->twt_requester = false; 4896 bss_conf->twt_protected = false; 4897 bss_conf->eht_support = false; 4898 } 4899 4900 bss_conf->twt_broadcast = 4901 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4902 4903 if (bss_conf->he_support) { 4904 bss_conf->he_bss_color.color = 4905 le32_get_bits(elems->he_operation->he_oper_params, 4906 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4907 bss_conf->he_bss_color.partial = 4908 le32_get_bits(elems->he_operation->he_oper_params, 4909 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4910 bss_conf->he_bss_color.enabled = 4911 !le32_get_bits(elems->he_operation->he_oper_params, 4912 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4913 4914 if (bss_conf->he_bss_color.enabled) 4915 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4916 4917 bss_conf->htc_trig_based_pkt_ext = 4918 le32_get_bits(elems->he_operation->he_oper_params, 4919 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4920 bss_conf->frame_time_rts_th = 4921 le32_get_bits(elems->he_operation->he_oper_params, 4922 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4923 4924 bss_conf->uora_exists = !!elems->uora_element; 4925 if (elems->uora_element) 4926 bss_conf->uora_ocw_range = elems->uora_element[0]; 4927 4928 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4929 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4930 /* TODO: OPEN: what happens if BSS color disable is set? */ 4931 } 4932 4933 if (cbss->transmitted_bss) { 4934 bss_conf->nontransmitted = true; 4935 ether_addr_copy(bss_conf->transmitter_bssid, 4936 cbss->transmitted_bss->bssid); 4937 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4938 bss_conf->bssid_index = cbss->bssid_index; 4939 } 4940 4941 /* 4942 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4943 * in their association response, so ignore that data for our own 4944 * configuration. If it changed since the last beacon, we'll get the 4945 * next beacon and update then. 4946 */ 4947 4948 /* 4949 * If an operating mode notification IE is present, override the 4950 * NSS calculation (that would be done in rate_control_rate_init()) 4951 * and use the # of streams from that element. 4952 */ 4953 if (elems->opmode_notif && 4954 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4955 u8 nss; 4956 4957 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4958 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4959 nss += 1; 4960 link_sta->pub->rx_nss = nss; 4961 } 4962 4963 /* 4964 * Always handle WMM once after association regardless 4965 * of the first value the AP uses. Setting -1 here has 4966 * that effect because the AP values is an unsigned 4967 * 4-bit value. 4968 */ 4969 link->u.mgd.wmm_last_param_set = -1; 4970 link->u.mgd.mu_edca_last_param_set = -1; 4971 4972 if (link->u.mgd.disable_wmm_tracking) { 4973 ieee80211_set_wmm_default(link, false, false); 4974 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4975 elems->wmm_param_len, 4976 elems->mu_edca_param_set)) { 4977 /* still enable QoS since we might have HT/VHT */ 4978 ieee80211_set_wmm_default(link, false, true); 4979 /* disable WMM tracking in this case to disable 4980 * tracking WMM parameter changes in the beacon if 4981 * the parameters weren't actually valid. Doing so 4982 * avoids changing parameters very strangely when 4983 * the AP is going back and forth between valid and 4984 * invalid parameters. 4985 */ 4986 link->u.mgd.disable_wmm_tracking = true; 4987 } 4988 4989 if (elems->max_idle_period_ie) { 4990 bss_conf->max_idle_period = 4991 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4992 bss_conf->protected_keep_alive = 4993 !!(elems->max_idle_period_ie->idle_options & 4994 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4995 *changed |= BSS_CHANGED_KEEP_ALIVE; 4996 } else { 4997 bss_conf->max_idle_period = 0; 4998 bss_conf->protected_keep_alive = false; 4999 } 5000 5001 /* set assoc capability (AID was already set earlier), 5002 * ieee80211_set_associated() will tell the driver */ 5003 bss_conf->assoc_capability = capab_info; 5004 5005 ret = true; 5006 out: 5007 kfree(elems); 5008 kfree(bss_ies); 5009 return ret; 5010 } 5011 5012 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5013 struct sta_info *sta, 5014 struct link_sta_info *link_sta, 5015 struct cfg80211_bss *cbss) 5016 { 5017 struct ieee80211_sub_if_data *sdata = link->sdata; 5018 struct ieee80211_local *local = sdata->local; 5019 struct ieee80211_bss *bss = (void *)cbss->priv; 5020 u32 rates = 0, basic_rates = 0; 5021 bool have_higher_than_11mbit = false; 5022 int min_rate = INT_MAX, min_rate_index = -1; 5023 struct ieee80211_supported_band *sband; 5024 5025 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5026 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5027 5028 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5029 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5030 ieee80211_s1g_sta_rate_init(sta); 5031 return 0; 5032 } 5033 5034 sband = local->hw.wiphy->bands[cbss->channel->band]; 5035 5036 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5037 &rates, &basic_rates, &have_higher_than_11mbit, 5038 &min_rate, &min_rate_index); 5039 5040 /* 5041 * This used to be a workaround for basic rates missing 5042 * in the association response frame. Now that we no 5043 * longer use the basic rates from there, it probably 5044 * doesn't happen any more, but keep the workaround so 5045 * in case some *other* APs are buggy in different ways 5046 * we can connect -- with a warning. 5047 * Allow this workaround only in case the AP provided at least 5048 * one rate. 5049 */ 5050 if (min_rate_index < 0) { 5051 link_info(link, "No legacy rates in association response\n"); 5052 return -EINVAL; 5053 } else if (!basic_rates) { 5054 link_info(link, "No basic rates, using min rate instead\n"); 5055 basic_rates = BIT(min_rate_index); 5056 } 5057 5058 if (rates) 5059 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5060 else 5061 link_info(link, "No rates found, keeping mandatory only\n"); 5062 5063 link->conf->basic_rates = basic_rates; 5064 5065 /* cf. IEEE 802.11 9.2.12 */ 5066 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5067 have_higher_than_11mbit; 5068 5069 return 0; 5070 } 5071 5072 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5073 struct cfg80211_bss *cbss) 5074 { 5075 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5076 const struct element *ht_cap_elem, *vht_cap_elem; 5077 const struct cfg80211_bss_ies *ies; 5078 const struct ieee80211_ht_cap *ht_cap; 5079 const struct ieee80211_vht_cap *vht_cap; 5080 const struct ieee80211_he_cap_elem *he_cap; 5081 const struct element *he_cap_elem; 5082 u16 mcs_80_map, mcs_160_map; 5083 int i, mcs_nss_size; 5084 bool support_160; 5085 u8 chains = 1; 5086 5087 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5088 return chains; 5089 5090 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5091 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5092 ht_cap = (void *)ht_cap_elem->data; 5093 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5094 /* 5095 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5096 * "Tx Unequal Modulation Supported" fields. 5097 */ 5098 } 5099 5100 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5101 return chains; 5102 5103 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5104 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5105 u8 nss; 5106 u16 tx_mcs_map; 5107 5108 vht_cap = (void *)vht_cap_elem->data; 5109 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5110 for (nss = 8; nss > 0; nss--) { 5111 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5112 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5113 break; 5114 } 5115 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5116 chains = max(chains, nss); 5117 } 5118 5119 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5120 return chains; 5121 5122 ies = rcu_dereference(cbss->ies); 5123 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5124 ies->data, ies->len); 5125 5126 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5127 return chains; 5128 5129 /* skip one byte ext_tag_id */ 5130 he_cap = (void *)(he_cap_elem->data + 1); 5131 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5132 5133 /* invalid HE IE */ 5134 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5135 return chains; 5136 5137 /* mcs_nss is right after he_cap info */ 5138 he_mcs_nss_supp = (void *)(he_cap + 1); 5139 5140 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5141 5142 for (i = 7; i >= 0; i--) { 5143 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5144 5145 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5146 chains = max_t(u8, chains, i + 1); 5147 break; 5148 } 5149 } 5150 5151 support_160 = he_cap->phy_cap_info[0] & 5152 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5153 5154 if (!support_160) 5155 return chains; 5156 5157 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5158 for (i = 7; i >= 0; i--) { 5159 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5160 5161 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5162 chains = max_t(u8, chains, i + 1); 5163 break; 5164 } 5165 } 5166 5167 return chains; 5168 } 5169 5170 static void 5171 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5172 struct ieee80211_supported_band *sband, 5173 struct cfg80211_assoc_request *req, 5174 bool wmm_used, int link_id, 5175 struct ieee80211_conn_settings *conn) 5176 { 5177 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5178 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5179 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5180 const struct ieee80211_sta_he_cap *he_cap; 5181 const struct ieee80211_sta_eht_cap *eht_cap; 5182 struct ieee80211_sta_vht_cap vht_cap; 5183 5184 if (sband->band == NL80211_BAND_S1GHZ) { 5185 conn->mode = IEEE80211_CONN_MODE_S1G; 5186 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5187 mlme_dbg(sdata, "operating as S1G STA\n"); 5188 return; 5189 } 5190 5191 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5192 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5193 5194 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5195 5196 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5197 mlme_link_id_dbg(sdata, link_id, 5198 "HT disabled by flag, limiting to legacy\n"); 5199 goto out; 5200 } 5201 5202 if (!wmm_used) { 5203 mlme_link_id_dbg(sdata, link_id, 5204 "WMM/QoS not supported, limiting to legacy\n"); 5205 goto out; 5206 } 5207 5208 if (req) { 5209 unsigned int i; 5210 5211 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5212 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5213 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5214 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5215 netdev_info(sdata->dev, 5216 "WEP/TKIP use, limiting to legacy\n"); 5217 goto out; 5218 } 5219 } 5220 } 5221 5222 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5223 mlme_link_id_dbg(sdata, link_id, 5224 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5225 goto out; 5226 } 5227 5228 /* HT is fine */ 5229 conn->mode = IEEE80211_CONN_MODE_HT; 5230 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5231 IEEE80211_CONN_BW_LIMIT_40 : 5232 IEEE80211_CONN_BW_LIMIT_20; 5233 5234 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5235 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5236 5237 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5238 mlme_link_id_dbg(sdata, link_id, 5239 "VHT disabled by flag, limiting to HT\n"); 5240 goto out; 5241 } 5242 5243 if (vht_cap.vht_supported && is_5ghz) { 5244 bool have_80mhz = false; 5245 unsigned int i; 5246 5247 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5248 mlme_link_id_dbg(sdata, link_id, 5249 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5250 goto out; 5251 } 5252 5253 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5254 for (i = 0; i < sband->n_channels; i++) { 5255 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5256 IEEE80211_CHAN_NO_80MHZ)) 5257 continue; 5258 5259 have_80mhz = true; 5260 break; 5261 } 5262 5263 if (!have_80mhz) { 5264 mlme_link_id_dbg(sdata, link_id, 5265 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5266 goto out; 5267 } 5268 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5269 mlme_link_id_dbg(sdata, link_id, 5270 "no VHT support on 5 GHz, limiting to HT\n"); 5271 goto out; 5272 } 5273 5274 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5275 if (sband->band != NL80211_BAND_2GHZ) { 5276 conn->mode = IEEE80211_CONN_MODE_VHT; 5277 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5278 } 5279 5280 if (is_5ghz && 5281 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5282 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5283 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5284 mlme_link_id_dbg(sdata, link_id, 5285 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5286 } 5287 5288 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5289 mlme_link_id_dbg(sdata, link_id, 5290 "HE disabled by flag, limiting to HT/VHT\n"); 5291 goto out; 5292 } 5293 5294 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5295 if (!he_cap) { 5296 WARN_ON(is_6ghz); 5297 mlme_link_id_dbg(sdata, link_id, 5298 "no HE support, limiting to HT/VHT\n"); 5299 goto out; 5300 } 5301 5302 /* so we have HE */ 5303 conn->mode = IEEE80211_CONN_MODE_HE; 5304 5305 /* check bandwidth */ 5306 switch (sband->band) { 5307 default: 5308 case NL80211_BAND_2GHZ: 5309 if (he_cap->he_cap_elem.phy_cap_info[0] & 5310 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5311 break; 5312 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5313 mlme_link_id_dbg(sdata, link_id, 5314 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5315 break; 5316 case NL80211_BAND_5GHZ: 5317 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5318 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5319 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5320 mlme_link_id_dbg(sdata, link_id, 5321 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5322 break; 5323 } 5324 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5325 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5326 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5327 conn->bw_limit, 5328 IEEE80211_CONN_BW_LIMIT_80); 5329 mlme_link_id_dbg(sdata, link_id, 5330 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5331 } 5332 break; 5333 case NL80211_BAND_6GHZ: 5334 if (he_cap->he_cap_elem.phy_cap_info[0] & 5335 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5336 break; 5337 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5338 conn->bw_limit, 5339 IEEE80211_CONN_BW_LIMIT_80); 5340 mlme_link_id_dbg(sdata, link_id, 5341 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5342 break; 5343 } 5344 5345 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5346 mlme_link_id_dbg(sdata, link_id, 5347 "EHT disabled by flag, limiting to HE\n"); 5348 goto out; 5349 } 5350 5351 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5352 if (!eht_cap) { 5353 mlme_link_id_dbg(sdata, link_id, 5354 "no EHT support, limiting to HE\n"); 5355 goto out; 5356 } 5357 5358 /* we have EHT */ 5359 5360 conn->mode = IEEE80211_CONN_MODE_EHT; 5361 5362 /* check bandwidth */ 5363 if (is_6ghz && 5364 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5365 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5366 else if (is_6ghz) 5367 mlme_link_id_dbg(sdata, link_id, 5368 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5369 5370 out: 5371 mlme_link_id_dbg(sdata, link_id, 5372 "determined local STA to be %s, BW limited to %d MHz\n", 5373 ieee80211_conn_mode_str(conn->mode), 5374 20 * (1 << conn->bw_limit)); 5375 } 5376 5377 static void 5378 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5379 struct ieee80211_supported_band *sband, 5380 struct cfg80211_auth_request *req, 5381 bool wmm_used, 5382 struct ieee80211_conn_settings *conn) 5383 { 5384 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5385 req->link_id > 0 ? req->link_id : 0, 5386 conn); 5387 } 5388 5389 static void 5390 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5391 struct ieee80211_supported_band *sband, 5392 struct cfg80211_assoc_request *req, 5393 bool wmm_used, int link_id, 5394 struct ieee80211_conn_settings *conn) 5395 { 5396 struct ieee80211_conn_settings tmp; 5397 5398 WARN_ON(!req); 5399 5400 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5401 &tmp); 5402 5403 conn->mode = min_t(enum ieee80211_conn_mode, 5404 conn->mode, tmp.mode); 5405 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5406 conn->bw_limit, tmp.bw_limit); 5407 } 5408 5409 static enum ieee80211_ap_reg_power 5410 ieee80211_ap_power_type(u8 control) 5411 { 5412 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5413 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5414 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5415 return IEEE80211_REG_LPI_AP; 5416 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5417 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5418 return IEEE80211_REG_SP_AP; 5419 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5420 return IEEE80211_REG_VLP_AP; 5421 default: 5422 return IEEE80211_REG_UNSET_AP; 5423 } 5424 } 5425 5426 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5427 struct ieee80211_link_data *link, 5428 int link_id, 5429 struct cfg80211_bss *cbss, bool mlo, 5430 struct ieee80211_conn_settings *conn) 5431 { 5432 struct ieee80211_local *local = sdata->local; 5433 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5434 struct ieee80211_chan_req chanreq = {}; 5435 struct cfg80211_chan_def ap_chandef; 5436 struct ieee802_11_elems *elems; 5437 int ret; 5438 5439 lockdep_assert_wiphy(local->hw.wiphy); 5440 5441 rcu_read_lock(); 5442 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5443 &chanreq, &ap_chandef); 5444 5445 if (IS_ERR(elems)) { 5446 rcu_read_unlock(); 5447 return PTR_ERR(elems); 5448 } 5449 5450 if (mlo && !elems->ml_basic) { 5451 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5452 rcu_read_unlock(); 5453 kfree(elems); 5454 return -EINVAL; 5455 } 5456 5457 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5458 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5459 5460 if (elems->pwr_constr_elem) 5461 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5462 5463 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5464 if (he_6ghz_oper) 5465 link->conf->power_type = 5466 ieee80211_ap_power_type(he_6ghz_oper->control); 5467 else 5468 link_info(link, 5469 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5470 cbss->channel->center_freq); 5471 5472 link->conf->tpe = elems->tpe; 5473 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5474 &chanreq.oper); 5475 } 5476 rcu_read_unlock(); 5477 /* the element data was RCU protected so no longer valid anyway */ 5478 kfree(elems); 5479 elems = NULL; 5480 5481 if (!link) 5482 return 0; 5483 5484 rcu_read_lock(); 5485 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5486 local->rx_chains); 5487 rcu_read_unlock(); 5488 5489 /* 5490 * If this fails (possibly due to channel context sharing 5491 * on incompatible channels, e.g. 80+80 and 160 sharing the 5492 * same control channel) try to use a smaller bandwidth. 5493 */ 5494 ret = ieee80211_link_use_channel(link, &chanreq, 5495 IEEE80211_CHANCTX_SHARED); 5496 5497 /* don't downgrade for 5 and 10 MHz channels, though. */ 5498 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5499 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5500 return ret; 5501 5502 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5503 ieee80211_chanreq_downgrade(&chanreq, conn); 5504 5505 ret = ieee80211_link_use_channel(link, &chanreq, 5506 IEEE80211_CHANCTX_SHARED); 5507 } 5508 5509 return ret; 5510 } 5511 5512 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5513 u8 *dtim_count, u8 *dtim_period) 5514 { 5515 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5516 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5517 ies->len); 5518 const struct ieee80211_tim_ie *tim = NULL; 5519 const struct ieee80211_bssid_index *idx; 5520 bool valid = tim_ie && tim_ie[1] >= 2; 5521 5522 if (valid) 5523 tim = (void *)(tim_ie + 2); 5524 5525 if (dtim_count) 5526 *dtim_count = valid ? tim->dtim_count : 0; 5527 5528 if (dtim_period) 5529 *dtim_period = valid ? tim->dtim_period : 0; 5530 5531 /* Check if value is overridden by non-transmitted profile */ 5532 if (!idx_ie || idx_ie[1] < 3) 5533 return valid; 5534 5535 idx = (void *)(idx_ie + 2); 5536 5537 if (dtim_count) 5538 *dtim_count = idx->dtim_count; 5539 5540 if (dtim_period) 5541 *dtim_period = idx->dtim_period; 5542 5543 return true; 5544 } 5545 5546 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5547 struct ieee80211_mgmt *mgmt, 5548 struct ieee802_11_elems *elems, 5549 const u8 *elem_start, unsigned int elem_len) 5550 { 5551 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5552 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5553 struct ieee80211_local *local = sdata->local; 5554 unsigned int link_id; 5555 struct sta_info *sta; 5556 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5557 u16 valid_links = 0, dormant_links = 0; 5558 int err; 5559 5560 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5561 /* 5562 * station info was already allocated and inserted before 5563 * the association and should be available to us 5564 */ 5565 sta = sta_info_get(sdata, assoc_data->ap_addr); 5566 if (WARN_ON(!sta)) 5567 goto out_err; 5568 5569 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5570 5571 if (ieee80211_vif_is_mld(&sdata->vif)) { 5572 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5573 if (!assoc_data->link[link_id].bss) 5574 continue; 5575 5576 valid_links |= BIT(link_id); 5577 if (assoc_data->link[link_id].disabled) 5578 dormant_links |= BIT(link_id); 5579 5580 if (link_id != assoc_data->assoc_link_id) { 5581 err = ieee80211_sta_allocate_link(sta, link_id); 5582 if (err) 5583 goto out_err; 5584 } 5585 } 5586 5587 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5588 } 5589 5590 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5591 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5592 struct ieee80211_link_data *link; 5593 struct link_sta_info *link_sta; 5594 5595 if (!cbss) 5596 continue; 5597 5598 link = sdata_dereference(sdata->link[link_id], sdata); 5599 if (WARN_ON(!link)) 5600 goto out_err; 5601 5602 if (ieee80211_vif_is_mld(&sdata->vif)) 5603 link_info(link, 5604 "local address %pM, AP link address %pM%s\n", 5605 link->conf->addr, 5606 assoc_data->link[link_id].bss->bssid, 5607 link_id == assoc_data->assoc_link_id ? 5608 " (assoc)" : ""); 5609 5610 link_sta = rcu_dereference_protected(sta->link[link_id], 5611 lockdep_is_held(&local->hw.wiphy->mtx)); 5612 if (WARN_ON(!link_sta)) 5613 goto out_err; 5614 5615 if (!link->u.mgd.have_beacon) { 5616 const struct cfg80211_bss_ies *ies; 5617 5618 rcu_read_lock(); 5619 ies = rcu_dereference(cbss->beacon_ies); 5620 if (ies) 5621 link->u.mgd.have_beacon = true; 5622 else 5623 ies = rcu_dereference(cbss->ies); 5624 ieee80211_get_dtim(ies, 5625 &link->conf->sync_dtim_count, 5626 &link->u.mgd.dtim_period); 5627 link->conf->beacon_int = cbss->beacon_interval; 5628 rcu_read_unlock(); 5629 } 5630 5631 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5632 5633 if (link_id != assoc_data->assoc_link_id) { 5634 link->u.mgd.conn = assoc_data->link[link_id].conn; 5635 5636 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5637 true, &link->u.mgd.conn); 5638 if (err) { 5639 link_info(link, "prep_channel failed\n"); 5640 goto out_err; 5641 } 5642 } 5643 5644 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5645 assoc_data->link[link_id].bss); 5646 if (err) 5647 goto out_err; 5648 5649 if (!ieee80211_assoc_config_link(link, link_sta, 5650 assoc_data->link[link_id].bss, 5651 mgmt, elem_start, elem_len, 5652 &changed[link_id])) 5653 goto out_err; 5654 5655 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5656 valid_links &= ~BIT(link_id); 5657 ieee80211_sta_remove_link(sta, link_id); 5658 continue; 5659 } 5660 5661 if (link_id != assoc_data->assoc_link_id) { 5662 err = ieee80211_sta_activate_link(sta, link_id); 5663 if (err) 5664 goto out_err; 5665 } 5666 } 5667 5668 /* links might have changed due to rejected ones, set them again */ 5669 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5670 5671 rate_control_rate_init(sta); 5672 5673 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5674 set_sta_flag(sta, WLAN_STA_MFP); 5675 sta->sta.mfp = true; 5676 } else { 5677 sta->sta.mfp = false; 5678 } 5679 5680 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5681 elems->ext_capab_len); 5682 5683 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5684 local->hw.queues >= IEEE80211_NUM_ACS; 5685 5686 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5687 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5688 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5689 if (err) { 5690 sdata_info(sdata, 5691 "failed to move station %pM to desired state\n", 5692 sta->sta.addr); 5693 WARN_ON(__sta_info_destroy(sta)); 5694 goto out_err; 5695 } 5696 5697 if (sdata->wdev.use_4addr) 5698 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5699 5700 ieee80211_set_associated(sdata, assoc_data, changed); 5701 5702 /* 5703 * If we're using 4-addr mode, let the AP know that we're 5704 * doing so, so that it can create the STA VLAN on its side 5705 */ 5706 if (ifmgd->use_4addr) 5707 ieee80211_send_4addr_nullfunc(local, sdata); 5708 5709 /* 5710 * Start timer to probe the connection to the AP now. 5711 * Also start the timer that will detect beacon loss. 5712 */ 5713 ieee80211_sta_reset_beacon_monitor(sdata); 5714 ieee80211_sta_reset_conn_monitor(sdata); 5715 5716 return true; 5717 out_err: 5718 eth_zero_addr(sdata->vif.cfg.ap_addr); 5719 return false; 5720 } 5721 5722 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5723 struct ieee80211_mgmt *mgmt, 5724 size_t len) 5725 { 5726 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5727 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5728 u16 capab_info, status_code, aid; 5729 struct ieee80211_elems_parse_params parse_params = { 5730 .bss = NULL, 5731 .link_id = -1, 5732 .from_ap = true, 5733 }; 5734 struct ieee802_11_elems *elems; 5735 int ac; 5736 const u8 *elem_start; 5737 unsigned int elem_len; 5738 bool reassoc; 5739 struct ieee80211_event event = { 5740 .type = MLME_EVENT, 5741 .u.mlme.data = ASSOC_EVENT, 5742 }; 5743 struct ieee80211_prep_tx_info info = {}; 5744 struct cfg80211_rx_assoc_resp_data resp = { 5745 .uapsd_queues = -1, 5746 }; 5747 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5748 unsigned int link_id; 5749 5750 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5751 5752 if (!assoc_data) 5753 return; 5754 5755 parse_params.mode = 5756 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5757 5758 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5759 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5760 return; 5761 5762 /* 5763 * AssocResp and ReassocResp have identical structure, so process both 5764 * of them in this function. 5765 */ 5766 5767 if (len < 24 + 6) 5768 return; 5769 5770 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5771 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5772 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5773 if (assoc_data->s1g) 5774 elem_start = mgmt->u.s1g_assoc_resp.variable; 5775 else 5776 elem_start = mgmt->u.assoc_resp.variable; 5777 5778 /* 5779 * Note: this may not be perfect, AP might misbehave - if 5780 * anyone needs to rely on perfect complete notification 5781 * with the exact right subtype, then we need to track what 5782 * we actually transmitted. 5783 */ 5784 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5785 IEEE80211_STYPE_ASSOC_REQ; 5786 5787 if (assoc_data->fils_kek_len && 5788 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5789 return; 5790 5791 elem_len = len - (elem_start - (u8 *)mgmt); 5792 parse_params.start = elem_start; 5793 parse_params.len = elem_len; 5794 elems = ieee802_11_parse_elems_full(&parse_params); 5795 if (!elems) 5796 goto notify_driver; 5797 5798 if (elems->aid_resp) 5799 aid = le16_to_cpu(elems->aid_resp->aid); 5800 else if (assoc_data->s1g) 5801 aid = 0; /* TODO */ 5802 else 5803 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5804 5805 /* 5806 * The 5 MSB of the AID field are reserved 5807 * (802.11-2016 9.4.1.8 AID field) 5808 */ 5809 aid &= 0x7ff; 5810 5811 sdata_info(sdata, 5812 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5813 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5814 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5815 5816 ifmgd->broken_ap = false; 5817 5818 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5819 elems->timeout_int && 5820 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5821 u32 tu, ms; 5822 5823 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5824 le32_to_cpu(elems->timeout_int->value)); 5825 5826 tu = le32_to_cpu(elems->timeout_int->value); 5827 ms = tu * 1024 / 1000; 5828 sdata_info(sdata, 5829 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5830 assoc_data->ap_addr, tu, ms); 5831 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5832 assoc_data->timeout_started = true; 5833 assoc_data->comeback = true; 5834 if (ms > IEEE80211_ASSOC_TIMEOUT) 5835 run_again(sdata, assoc_data->timeout); 5836 goto notify_driver; 5837 } 5838 5839 if (status_code != WLAN_STATUS_SUCCESS) { 5840 sdata_info(sdata, "%pM denied association (code=%d)\n", 5841 assoc_data->ap_addr, status_code); 5842 event.u.mlme.status = MLME_DENIED; 5843 event.u.mlme.reason = status_code; 5844 drv_event_callback(sdata->local, sdata, &event); 5845 } else { 5846 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5847 sdata_info(sdata, 5848 "invalid AID value %d (out of range), turn off PS\n", 5849 aid); 5850 aid = 0; 5851 ifmgd->broken_ap = true; 5852 } 5853 5854 if (ieee80211_vif_is_mld(&sdata->vif)) { 5855 struct ieee80211_mle_basic_common_info *common; 5856 5857 if (!elems->ml_basic) { 5858 sdata_info(sdata, 5859 "MLO association with %pM but no (basic) multi-link element in response!\n", 5860 assoc_data->ap_addr); 5861 goto abandon_assoc; 5862 } 5863 5864 common = (void *)elems->ml_basic->variable; 5865 5866 if (memcmp(assoc_data->ap_addr, 5867 common->mld_mac_addr, ETH_ALEN)) { 5868 sdata_info(sdata, 5869 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5870 common->mld_mac_addr, 5871 assoc_data->ap_addr); 5872 goto abandon_assoc; 5873 } 5874 5875 sdata->vif.cfg.eml_cap = 5876 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5877 sdata->vif.cfg.eml_med_sync_delay = 5878 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5879 sdata->vif.cfg.mld_capa_op = 5880 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5881 } 5882 5883 sdata->vif.cfg.aid = aid; 5884 5885 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5886 elem_start, elem_len)) { 5887 /* oops -- internal error -- send timeout for now */ 5888 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5889 goto notify_driver; 5890 } 5891 event.u.mlme.status = MLME_SUCCESS; 5892 drv_event_callback(sdata->local, sdata, &event); 5893 sdata_info(sdata, "associated\n"); 5894 5895 info.success = 1; 5896 } 5897 5898 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5899 struct ieee80211_link_data *link; 5900 5901 if (!assoc_data->link[link_id].bss) 5902 continue; 5903 5904 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5905 ether_addr_copy(resp.links[link_id].addr, 5906 assoc_data->link[link_id].addr); 5907 resp.links[link_id].status = assoc_data->link[link_id].status; 5908 5909 link = sdata_dereference(sdata->link[link_id], sdata); 5910 if (!link) 5911 continue; 5912 5913 /* get uapsd queues configuration - same for all links */ 5914 resp.uapsd_queues = 0; 5915 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5916 if (link->tx_conf[ac].uapsd) 5917 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5918 } 5919 5920 if (ieee80211_vif_is_mld(&sdata->vif)) { 5921 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5922 resp.ap_mld_addr = ap_mld_addr; 5923 } 5924 5925 ieee80211_destroy_assoc_data(sdata, 5926 status_code == WLAN_STATUS_SUCCESS ? 5927 ASSOC_SUCCESS : 5928 ASSOC_REJECTED); 5929 5930 resp.buf = (u8 *)mgmt; 5931 resp.len = len; 5932 resp.req_ies = ifmgd->assoc_req_ies; 5933 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5934 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5935 notify_driver: 5936 drv_mgd_complete_tx(sdata->local, sdata, &info); 5937 kfree(elems); 5938 return; 5939 abandon_assoc: 5940 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5941 goto notify_driver; 5942 } 5943 5944 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5945 struct ieee80211_mgmt *mgmt, size_t len, 5946 struct ieee80211_rx_status *rx_status) 5947 { 5948 struct ieee80211_sub_if_data *sdata = link->sdata; 5949 struct ieee80211_local *local = sdata->local; 5950 struct ieee80211_bss *bss; 5951 struct ieee80211_channel *channel; 5952 5953 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5954 5955 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5956 ieee80211_rx_status_to_khz(rx_status)); 5957 if (!channel) 5958 return; 5959 5960 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5961 if (bss) { 5962 link->conf->beacon_rate = bss->beacon_rate; 5963 ieee80211_rx_bss_put(local, bss); 5964 } 5965 } 5966 5967 5968 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5969 struct sk_buff *skb) 5970 { 5971 struct ieee80211_sub_if_data *sdata = link->sdata; 5972 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5973 struct ieee80211_if_managed *ifmgd; 5974 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5975 struct ieee80211_channel *channel; 5976 size_t baselen, len = skb->len; 5977 5978 ifmgd = &sdata->u.mgd; 5979 5980 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5981 5982 /* 5983 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5984 * "If a 6 GHz AP receives a Probe Request frame and responds with 5985 * a Probe Response frame [..], the Address 1 field of the Probe 5986 * Response frame shall be set to the broadcast address [..]" 5987 * So, on 6GHz band we should also accept broadcast responses. 5988 */ 5989 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5990 rx_status->freq); 5991 if (!channel) 5992 return; 5993 5994 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5995 (channel->band != NL80211_BAND_6GHZ || 5996 !is_broadcast_ether_addr(mgmt->da))) 5997 return; /* ignore ProbeResp to foreign address */ 5998 5999 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 6000 if (baselen > len) 6001 return; 6002 6003 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6004 6005 if (ifmgd->associated && 6006 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6007 ieee80211_reset_ap_probe(sdata); 6008 } 6009 6010 /* 6011 * This is the canonical list of information elements we care about, 6012 * the filter code also gives us all changes to the Microsoft OUI 6013 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6014 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6015 * changes to requested client power. 6016 * 6017 * We implement beacon filtering in software since that means we can 6018 * avoid processing the frame here and in cfg80211, and userspace 6019 * will not be able to tell whether the hardware supports it or not. 6020 * 6021 * XXX: This list needs to be dynamic -- userspace needs to be able to 6022 * add items it requires. It also needs to be able to tell us to 6023 * look out for other vendor IEs. 6024 */ 6025 static const u64 care_about_ies = 6026 (1ULL << WLAN_EID_COUNTRY) | 6027 (1ULL << WLAN_EID_ERP_INFO) | 6028 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6029 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6030 (1ULL << WLAN_EID_HT_CAPABILITY) | 6031 (1ULL << WLAN_EID_HT_OPERATION) | 6032 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6033 6034 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6035 struct ieee80211_if_managed *ifmgd, 6036 struct ieee80211_bss_conf *bss_conf, 6037 struct ieee80211_local *local, 6038 struct ieee80211_rx_status *rx_status) 6039 { 6040 struct ieee80211_sub_if_data *sdata = link->sdata; 6041 6042 /* Track average RSSI from the Beacon frames of the current AP */ 6043 6044 if (!link->u.mgd.tracking_signal_avg) { 6045 link->u.mgd.tracking_signal_avg = true; 6046 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6047 link->u.mgd.last_cqm_event_signal = 0; 6048 link->u.mgd.count_beacon_signal = 1; 6049 link->u.mgd.last_ave_beacon_signal = 0; 6050 } else { 6051 link->u.mgd.count_beacon_signal++; 6052 } 6053 6054 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6055 -rx_status->signal); 6056 6057 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6058 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6059 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6060 int last_sig = link->u.mgd.last_ave_beacon_signal; 6061 struct ieee80211_event event = { 6062 .type = RSSI_EVENT, 6063 }; 6064 6065 /* 6066 * if signal crosses either of the boundaries, invoke callback 6067 * with appropriate parameters 6068 */ 6069 if (sig > ifmgd->rssi_max_thold && 6070 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6071 link->u.mgd.last_ave_beacon_signal = sig; 6072 event.u.rssi.data = RSSI_EVENT_HIGH; 6073 drv_event_callback(local, sdata, &event); 6074 } else if (sig < ifmgd->rssi_min_thold && 6075 (last_sig >= ifmgd->rssi_max_thold || 6076 last_sig == 0)) { 6077 link->u.mgd.last_ave_beacon_signal = sig; 6078 event.u.rssi.data = RSSI_EVENT_LOW; 6079 drv_event_callback(local, sdata, &event); 6080 } 6081 } 6082 6083 if (bss_conf->cqm_rssi_thold && 6084 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6085 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6086 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6087 int last_event = link->u.mgd.last_cqm_event_signal; 6088 int thold = bss_conf->cqm_rssi_thold; 6089 int hyst = bss_conf->cqm_rssi_hyst; 6090 6091 if (sig < thold && 6092 (last_event == 0 || sig < last_event - hyst)) { 6093 link->u.mgd.last_cqm_event_signal = sig; 6094 ieee80211_cqm_rssi_notify( 6095 &sdata->vif, 6096 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6097 sig, GFP_KERNEL); 6098 } else if (sig > thold && 6099 (last_event == 0 || sig > last_event + hyst)) { 6100 link->u.mgd.last_cqm_event_signal = sig; 6101 ieee80211_cqm_rssi_notify( 6102 &sdata->vif, 6103 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6104 sig, GFP_KERNEL); 6105 } 6106 } 6107 6108 if (bss_conf->cqm_rssi_low && 6109 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6110 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6111 int last_event = link->u.mgd.last_cqm_event_signal; 6112 int low = bss_conf->cqm_rssi_low; 6113 int high = bss_conf->cqm_rssi_high; 6114 6115 if (sig < low && 6116 (last_event == 0 || last_event >= low)) { 6117 link->u.mgd.last_cqm_event_signal = sig; 6118 ieee80211_cqm_rssi_notify( 6119 &sdata->vif, 6120 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6121 sig, GFP_KERNEL); 6122 } else if (sig > high && 6123 (last_event == 0 || last_event <= high)) { 6124 link->u.mgd.last_cqm_event_signal = sig; 6125 ieee80211_cqm_rssi_notify( 6126 &sdata->vif, 6127 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6128 sig, GFP_KERNEL); 6129 } 6130 } 6131 } 6132 6133 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6134 struct cfg80211_bss *bss) 6135 { 6136 if (ether_addr_equal(tx_bssid, bss->bssid)) 6137 return true; 6138 if (!bss->transmitted_bss) 6139 return false; 6140 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6141 } 6142 6143 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6144 struct wiphy_work *work) 6145 { 6146 struct ieee80211_sub_if_data *sdata = 6147 container_of(work, struct ieee80211_sub_if_data, 6148 u.mgd.ml_reconf_work.work); 6149 u16 new_valid_links, new_active_links, new_dormant_links; 6150 int ret; 6151 6152 if (!sdata->u.mgd.removed_links) 6153 return; 6154 6155 sdata_info(sdata, 6156 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6157 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6158 6159 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6160 if (new_valid_links == sdata->vif.valid_links) 6161 return; 6162 6163 if (!new_valid_links || 6164 !(new_valid_links & ~sdata->vif.dormant_links)) { 6165 sdata_info(sdata, "No valid links after reconfiguration\n"); 6166 ret = -EINVAL; 6167 goto out; 6168 } 6169 6170 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6171 if (new_active_links != sdata->vif.active_links) { 6172 if (!new_active_links) 6173 new_active_links = 6174 BIT(ffs(new_valid_links & 6175 ~sdata->vif.dormant_links) - 1); 6176 6177 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6178 if (ret) { 6179 sdata_info(sdata, 6180 "Failed setting active links\n"); 6181 goto out; 6182 } 6183 } 6184 6185 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6186 6187 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6188 new_dormant_links); 6189 if (ret) 6190 sdata_info(sdata, "Failed setting valid links\n"); 6191 6192 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6193 6194 out: 6195 if (!ret) 6196 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6197 else 6198 __ieee80211_disconnect(sdata); 6199 6200 sdata->u.mgd.removed_links = 0; 6201 } 6202 6203 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6204 struct ieee802_11_elems *elems) 6205 { 6206 const struct element *sub; 6207 unsigned long removed_links = 0; 6208 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6209 u8 link_id; 6210 u32 delay; 6211 6212 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6213 return; 6214 6215 /* Directly parse the sub elements as the common information doesn't 6216 * hold any useful information. 6217 */ 6218 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6219 elems->ml_reconf_len) { 6220 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6221 u8 *pos = prof->variable; 6222 u16 control; 6223 6224 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6225 continue; 6226 6227 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6228 sub->datalen)) 6229 return; 6230 6231 control = le16_to_cpu(prof->control); 6232 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6233 6234 removed_links |= BIT(link_id); 6235 6236 /* the MAC address should not be included, but handle it */ 6237 if (control & 6238 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6239 pos += 6; 6240 6241 /* According to Draft P802.11be_D3.0, the control should 6242 * include the AP Removal Timer present. If the AP Removal Timer 6243 * is not present assume immediate removal. 6244 */ 6245 if (control & 6246 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6247 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6248 } 6249 6250 removed_links &= sdata->vif.valid_links; 6251 if (!removed_links) { 6252 /* In case the removal was cancelled, abort it */ 6253 if (sdata->u.mgd.removed_links) { 6254 sdata->u.mgd.removed_links = 0; 6255 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6256 &sdata->u.mgd.ml_reconf_work); 6257 } 6258 return; 6259 } 6260 6261 delay = 0; 6262 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6263 struct ieee80211_bss_conf *link_conf = 6264 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6265 u32 link_delay; 6266 6267 if (!link_conf) { 6268 removed_links &= ~BIT(link_id); 6269 continue; 6270 } 6271 6272 if (link_removal_timeout[link_id] < 1) 6273 link_delay = 0; 6274 else 6275 link_delay = link_conf->beacon_int * 6276 (link_removal_timeout[link_id] - 1); 6277 6278 if (!delay) 6279 delay = link_delay; 6280 else 6281 delay = min(delay, link_delay); 6282 } 6283 6284 sdata->u.mgd.removed_links = removed_links; 6285 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6286 &sdata->u.mgd.ml_reconf_work, 6287 TU_TO_JIFFIES(delay)); 6288 } 6289 6290 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6291 u16 active_links, u16 dormant_links, 6292 u16 suspended_links) 6293 { 6294 u64 changed = 0; 6295 int ret; 6296 6297 if (!active_links) { 6298 ret = -EINVAL; 6299 goto out; 6300 } 6301 6302 /* If there is an active negotiated TTLM, it should be discarded by 6303 * the new negotiated/advertised TTLM. 6304 */ 6305 if (sdata->vif.neg_ttlm.valid) { 6306 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6307 sdata->vif.suspended_links = 0; 6308 changed = BSS_CHANGED_MLD_TTLM; 6309 } 6310 6311 if (sdata->vif.active_links != active_links) { 6312 /* usable links are affected when active_links are changed, 6313 * so notify the driver about the status change 6314 */ 6315 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6316 active_links &= sdata->vif.active_links; 6317 if (!active_links) 6318 active_links = 6319 BIT(__ffs(sdata->vif.valid_links & 6320 ~dormant_links)); 6321 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6322 if (ret) { 6323 sdata_info(sdata, "Failed to set TTLM active links\n"); 6324 goto out; 6325 } 6326 } 6327 6328 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6329 dormant_links); 6330 if (ret) { 6331 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6332 goto out; 6333 } 6334 6335 sdata->vif.suspended_links = suspended_links; 6336 if (sdata->vif.suspended_links) 6337 changed |= BSS_CHANGED_MLD_TTLM; 6338 6339 ieee80211_vif_cfg_change_notify(sdata, changed); 6340 6341 out: 6342 if (ret) 6343 ieee80211_disconnect(&sdata->vif, false); 6344 6345 return ret; 6346 } 6347 6348 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6349 struct wiphy_work *work) 6350 { 6351 u16 new_active_links, new_dormant_links; 6352 struct ieee80211_sub_if_data *sdata = 6353 container_of(work, struct ieee80211_sub_if_data, 6354 u.mgd.ttlm_work.work); 6355 6356 new_active_links = sdata->u.mgd.ttlm_info.map & 6357 sdata->vif.valid_links; 6358 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6359 sdata->vif.valid_links; 6360 6361 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6362 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6363 0)) 6364 return; 6365 6366 sdata->u.mgd.ttlm_info.active = true; 6367 sdata->u.mgd.ttlm_info.switch_time = 0; 6368 } 6369 6370 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6371 { 6372 if (bm_size == 1) 6373 return *data; 6374 else 6375 return get_unaligned_le16(data); 6376 } 6377 6378 static int 6379 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6380 const struct ieee80211_ttlm_elem *ttlm, 6381 struct ieee80211_adv_ttlm_info *ttlm_info) 6382 { 6383 /* The element size was already validated in 6384 * ieee80211_tid_to_link_map_size_ok() 6385 */ 6386 u8 control, link_map_presence, map_size, tid; 6387 u8 *pos; 6388 6389 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6390 pos = (void *)ttlm->optional; 6391 control = ttlm->control; 6392 6393 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6394 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6395 return 0; 6396 6397 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6398 IEEE80211_TTLM_DIRECTION_BOTH) { 6399 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6400 return -EINVAL; 6401 } 6402 6403 link_map_presence = *pos; 6404 pos++; 6405 6406 ttlm_info->switch_time = get_unaligned_le16(pos); 6407 6408 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6409 * by 1. 6410 */ 6411 if (!ttlm_info->switch_time) 6412 ttlm_info->switch_time = 1; 6413 6414 pos += 2; 6415 6416 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6417 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6418 pos += 3; 6419 } 6420 6421 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6422 map_size = 1; 6423 else 6424 map_size = 2; 6425 6426 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6427 * not advertise a TID-to-link mapping that does not map all TIDs to the 6428 * same link set, reject frame if not all links have mapping 6429 */ 6430 if (link_map_presence != 0xff) { 6431 sdata_info(sdata, 6432 "Invalid advertised T2L mapping presence indicator\n"); 6433 return -EINVAL; 6434 } 6435 6436 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6437 if (!ttlm_info->map) { 6438 sdata_info(sdata, 6439 "Invalid advertised T2L map for TID 0\n"); 6440 return -EINVAL; 6441 } 6442 6443 pos += map_size; 6444 6445 for (tid = 1; tid < 8; tid++) { 6446 u16 map = ieee80211_get_ttlm(map_size, pos); 6447 6448 if (map != ttlm_info->map) { 6449 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6450 tid); 6451 return -EINVAL; 6452 } 6453 6454 pos += map_size; 6455 } 6456 return 0; 6457 } 6458 6459 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6460 struct ieee802_11_elems *elems, 6461 u64 beacon_ts) 6462 { 6463 u8 i; 6464 int ret; 6465 6466 if (!ieee80211_vif_is_mld(&sdata->vif)) 6467 return; 6468 6469 if (!elems->ttlm_num) { 6470 if (sdata->u.mgd.ttlm_info.switch_time) { 6471 /* if a planned TID-to-link mapping was cancelled - 6472 * abort it 6473 */ 6474 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6475 &sdata->u.mgd.ttlm_work); 6476 } else if (sdata->u.mgd.ttlm_info.active) { 6477 /* if no TID-to-link element, set to default mapping in 6478 * which all TIDs are mapped to all setup links 6479 */ 6480 ret = ieee80211_vif_set_links(sdata, 6481 sdata->vif.valid_links, 6482 0); 6483 if (ret) { 6484 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6485 return; 6486 } 6487 ieee80211_vif_cfg_change_notify(sdata, 6488 BSS_CHANGED_MLD_VALID_LINKS); 6489 } 6490 memset(&sdata->u.mgd.ttlm_info, 0, 6491 sizeof(sdata->u.mgd.ttlm_info)); 6492 return; 6493 } 6494 6495 for (i = 0; i < elems->ttlm_num; i++) { 6496 struct ieee80211_adv_ttlm_info ttlm_info; 6497 u32 res; 6498 6499 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6500 &ttlm_info); 6501 6502 if (res) { 6503 __ieee80211_disconnect(sdata); 6504 return; 6505 } 6506 6507 if (ttlm_info.switch_time) { 6508 u16 beacon_ts_tu, st_tu, delay; 6509 u32 delay_jiffies; 6510 u64 mask; 6511 6512 /* The t2l map switch time is indicated with a partial 6513 * TSF value (bits 10 to 25), get the partial beacon TS 6514 * as well, and calc the delay to the start time. 6515 */ 6516 mask = GENMASK_ULL(25, 10); 6517 beacon_ts_tu = (beacon_ts & mask) >> 10; 6518 st_tu = ttlm_info.switch_time; 6519 delay = st_tu - beacon_ts_tu; 6520 6521 /* 6522 * If the switch time is far in the future, then it 6523 * could also be the previous switch still being 6524 * announced. 6525 * We can simply ignore it for now, if it is a future 6526 * switch the AP will continue to announce it anyway. 6527 */ 6528 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6529 return; 6530 6531 delay_jiffies = TU_TO_JIFFIES(delay); 6532 6533 /* Link switching can take time, so schedule it 6534 * 100ms before to be ready on time 6535 */ 6536 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6537 delay_jiffies -= 6538 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6539 else 6540 delay_jiffies = 0; 6541 6542 sdata->u.mgd.ttlm_info = ttlm_info; 6543 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6544 &sdata->u.mgd.ttlm_work); 6545 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6546 &sdata->u.mgd.ttlm_work, 6547 delay_jiffies); 6548 return; 6549 } 6550 } 6551 } 6552 6553 static void 6554 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 6555 int reporting_link_id, 6556 struct ieee802_11_elems *elems) 6557 { 6558 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6559 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6560 const struct element *sub; 6561 const u8 *subelems; 6562 size_t subelems_len; 6563 u8 common_size; 6564 int link_id; 6565 6566 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 6567 return; 6568 6569 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 6570 subelems = (u8 *)elems->ml_basic + common_size; 6571 subelems_len = elems->ml_basic_len - common_size; 6572 6573 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 6574 subelems, subelems_len) { 6575 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6576 struct ieee80211_link_data *link; 6577 ssize_t len; 6578 6579 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 6580 sub->datalen)) 6581 continue; 6582 6583 link_id = le16_get_bits(prof->control, 6584 IEEE80211_MLE_STA_CONTROL_LINK_ID); 6585 /* need a valid link ID, but also not our own, both AP bugs */ 6586 if (link_id == reporting_link_id || 6587 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6588 continue; 6589 6590 link = sdata_dereference(sdata->link[link_id], sdata); 6591 if (!link) 6592 continue; 6593 6594 len = cfg80211_defragment_element(sub, subelems, subelems_len, 6595 NULL, 0, 6596 IEEE80211_MLE_SUBELEM_FRAGMENT); 6597 if (WARN_ON(len < 0)) 6598 continue; 6599 6600 sta_profiles[link_id] = sub; 6601 sta_profiles_len[link_id] = len; 6602 } 6603 6604 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6605 struct ieee80211_mle_per_sta_profile *prof; 6606 struct ieee802_11_elems *prof_elems; 6607 struct ieee80211_link_data *link; 6608 ssize_t len; 6609 6610 if (link_id == reporting_link_id) 6611 continue; 6612 6613 link = sdata_dereference(sdata->link[link_id], sdata); 6614 if (!link) 6615 continue; 6616 6617 if (!sta_profiles[link_id]) { 6618 prof_elems = NULL; 6619 goto handle; 6620 } 6621 6622 /* we can defragment in-place, won't use the buffer again */ 6623 len = cfg80211_defragment_element(sta_profiles[link_id], 6624 subelems, subelems_len, 6625 (void *)sta_profiles[link_id], 6626 sta_profiles_len[link_id], 6627 IEEE80211_MLE_SUBELEM_FRAGMENT); 6628 if (WARN_ON(len != sta_profiles_len[link_id])) 6629 continue; 6630 6631 prof = (void *)sta_profiles[link_id]; 6632 prof_elems = ieee802_11_parse_elems(prof->variable + 6633 (prof->sta_info_len - 1), 6634 len - 6635 (prof->sta_info_len - 1), 6636 false, NULL); 6637 6638 /* memory allocation failed - let's hope that's transient */ 6639 if (!prof_elems) 6640 continue; 6641 6642 handle: 6643 /* 6644 * FIXME: the timings here are obviously incorrect, 6645 * but only older Intel drivers seem to care, and 6646 * those don't have MLO. If you really need this, 6647 * the problem is having to calculate it with the 6648 * TSF offset etc. The device_timestamp is still 6649 * correct, of course. 6650 */ 6651 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 6652 IEEE80211_CSA_SOURCE_OTHER_LINK); 6653 kfree(prof_elems); 6654 } 6655 } 6656 6657 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6658 struct ieee80211_hdr *hdr, size_t len, 6659 struct ieee80211_rx_status *rx_status) 6660 { 6661 struct ieee80211_sub_if_data *sdata = link->sdata; 6662 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6663 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6664 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6665 struct ieee80211_mgmt *mgmt = (void *) hdr; 6666 size_t baselen; 6667 struct ieee802_11_elems *elems; 6668 struct ieee80211_local *local = sdata->local; 6669 struct ieee80211_chanctx_conf *chanctx_conf; 6670 struct ieee80211_supported_band *sband; 6671 struct ieee80211_channel *chan; 6672 struct link_sta_info *link_sta; 6673 struct sta_info *sta; 6674 u64 changed = 0; 6675 bool erp_valid; 6676 u8 erp_value = 0; 6677 u32 ncrc = 0; 6678 u8 *bssid, *variable = mgmt->u.beacon.variable; 6679 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6680 struct ieee80211_elems_parse_params parse_params = { 6681 .mode = link->u.mgd.conn.mode, 6682 .link_id = -1, 6683 .from_ap = true, 6684 }; 6685 6686 lockdep_assert_wiphy(local->hw.wiphy); 6687 6688 /* Process beacon from the current BSS */ 6689 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6690 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6691 struct ieee80211_ext *ext = (void *) mgmt; 6692 6693 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6694 variable = ext->u.s1g_short_beacon.variable; 6695 else 6696 variable = ext->u.s1g_beacon.variable; 6697 } 6698 6699 baselen = (u8 *) variable - (u8 *) mgmt; 6700 if (baselen > len) 6701 return; 6702 6703 parse_params.start = variable; 6704 parse_params.len = len - baselen; 6705 6706 rcu_read_lock(); 6707 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6708 if (!chanctx_conf) { 6709 rcu_read_unlock(); 6710 return; 6711 } 6712 6713 if (ieee80211_rx_status_to_khz(rx_status) != 6714 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6715 rcu_read_unlock(); 6716 return; 6717 } 6718 chan = chanctx_conf->def.chan; 6719 rcu_read_unlock(); 6720 6721 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6722 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6723 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6724 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6725 elems = ieee802_11_parse_elems_full(&parse_params); 6726 if (!elems) 6727 return; 6728 6729 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6730 6731 if (elems->dtim_period) 6732 link->u.mgd.dtim_period = elems->dtim_period; 6733 link->u.mgd.have_beacon = true; 6734 ifmgd->assoc_data->need_beacon = false; 6735 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6736 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6737 link->conf->sync_tsf = 6738 le64_to_cpu(mgmt->u.beacon.timestamp); 6739 link->conf->sync_device_ts = 6740 rx_status->device_timestamp; 6741 link->conf->sync_dtim_count = elems->dtim_count; 6742 } 6743 6744 if (elems->mbssid_config_ie) 6745 bss_conf->profile_periodicity = 6746 elems->mbssid_config_ie->profile_periodicity; 6747 else 6748 bss_conf->profile_periodicity = 0; 6749 6750 if (elems->ext_capab_len >= 11 && 6751 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6752 bss_conf->ema_ap = true; 6753 else 6754 bss_conf->ema_ap = false; 6755 6756 /* continue assoc process */ 6757 ifmgd->assoc_data->timeout = jiffies; 6758 ifmgd->assoc_data->timeout_started = true; 6759 run_again(sdata, ifmgd->assoc_data->timeout); 6760 kfree(elems); 6761 return; 6762 } 6763 6764 if (!ifmgd->associated || 6765 !ieee80211_rx_our_beacon(bssid, link->conf->bss)) 6766 return; 6767 bssid = link->u.mgd.bssid; 6768 6769 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6770 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6771 local, rx_status); 6772 6773 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6774 mlme_dbg_ratelimited(sdata, 6775 "cancelling AP probe due to a received beacon\n"); 6776 ieee80211_reset_ap_probe(sdata); 6777 } 6778 6779 /* 6780 * Push the beacon loss detection into the future since 6781 * we are processing a beacon from the AP just now. 6782 */ 6783 ieee80211_sta_reset_beacon_monitor(sdata); 6784 6785 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6786 * element (which carries the beacon interval). Don't forget to add a 6787 * bit to care_about_ies[] above if mac80211 is interested in a 6788 * changing S1G element. 6789 */ 6790 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6791 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6792 parse_params.bss = link->conf->bss; 6793 parse_params.filter = care_about_ies; 6794 parse_params.crc = ncrc; 6795 elems = ieee802_11_parse_elems_full(&parse_params); 6796 if (!elems) 6797 return; 6798 ncrc = elems->crc; 6799 6800 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6801 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6802 if (local->hw.conf.dynamic_ps_timeout > 0) { 6803 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6804 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6805 ieee80211_hw_config(local, 6806 IEEE80211_CONF_CHANGE_PS); 6807 } 6808 ieee80211_send_nullfunc(local, sdata, false); 6809 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6810 local->pspolling = true; 6811 6812 /* 6813 * Here is assumed that the driver will be 6814 * able to send ps-poll frame and receive a 6815 * response even though power save mode is 6816 * enabled, but some drivers might require 6817 * to disable power save here. This needs 6818 * to be investigated. 6819 */ 6820 ieee80211_send_pspoll(local, sdata); 6821 } 6822 } 6823 6824 if (sdata->vif.p2p || 6825 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6826 struct ieee80211_p2p_noa_attr noa = {}; 6827 int ret; 6828 6829 ret = cfg80211_get_p2p_attr(variable, 6830 len - baselen, 6831 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6832 (u8 *) &noa, sizeof(noa)); 6833 if (ret >= 2) { 6834 if (link->u.mgd.p2p_noa_index != noa.index) { 6835 /* valid noa_attr and index changed */ 6836 link->u.mgd.p2p_noa_index = noa.index; 6837 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6838 changed |= BSS_CHANGED_P2P_PS; 6839 /* 6840 * make sure we update all information, the CRC 6841 * mechanism doesn't look at P2P attributes. 6842 */ 6843 link->u.mgd.beacon_crc_valid = false; 6844 } 6845 } else if (link->u.mgd.p2p_noa_index != -1) { 6846 /* noa_attr not found and we had valid noa_attr before */ 6847 link->u.mgd.p2p_noa_index = -1; 6848 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6849 changed |= BSS_CHANGED_P2P_PS; 6850 link->u.mgd.beacon_crc_valid = false; 6851 } 6852 } 6853 6854 /* 6855 * Update beacon timing and dtim count on every beacon appearance. This 6856 * will allow the driver to use the most updated values. Do it before 6857 * comparing this one with last received beacon. 6858 * IMPORTANT: These parameters would possibly be out of sync by the time 6859 * the driver will use them. The synchronized view is currently 6860 * guaranteed only in certain callbacks. 6861 */ 6862 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6863 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6864 link->conf->sync_tsf = 6865 le64_to_cpu(mgmt->u.beacon.timestamp); 6866 link->conf->sync_device_ts = 6867 rx_status->device_timestamp; 6868 link->conf->sync_dtim_count = elems->dtim_count; 6869 } 6870 6871 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6872 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6873 goto free; 6874 link->u.mgd.beacon_crc = ncrc; 6875 link->u.mgd.beacon_crc_valid = true; 6876 6877 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6878 6879 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6880 rx_status->device_timestamp, 6881 elems, elems, 6882 IEEE80211_CSA_SOURCE_BEACON); 6883 6884 /* note that after this elems->ml_basic can no longer be used fully */ 6885 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 6886 6887 if (!link->u.mgd.disable_wmm_tracking && 6888 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6889 elems->wmm_param_len, 6890 elems->mu_edca_param_set)) 6891 changed |= BSS_CHANGED_QOS; 6892 6893 /* 6894 * If we haven't had a beacon before, tell the driver about the 6895 * DTIM period (and beacon timing if desired) now. 6896 */ 6897 if (!link->u.mgd.have_beacon) { 6898 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6899 bss_conf->dtim_period = elems->dtim_period ?: 1; 6900 6901 changed |= BSS_CHANGED_BEACON_INFO; 6902 link->u.mgd.have_beacon = true; 6903 6904 ieee80211_recalc_ps(local); 6905 6906 ieee80211_recalc_ps_vif(sdata); 6907 } 6908 6909 if (elems->erp_info) { 6910 erp_valid = true; 6911 erp_value = elems->erp_info[0]; 6912 } else { 6913 erp_valid = false; 6914 } 6915 6916 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6917 changed |= ieee80211_handle_bss_capability(link, 6918 le16_to_cpu(mgmt->u.beacon.capab_info), 6919 erp_valid, erp_value); 6920 6921 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6922 if (WARN_ON(!sta)) { 6923 goto free; 6924 } 6925 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6926 lockdep_is_held(&local->hw.wiphy->mtx)); 6927 if (WARN_ON(!link_sta)) { 6928 goto free; 6929 } 6930 6931 if (WARN_ON(!link->conf->chanreq.oper.chan)) 6932 goto free; 6933 6934 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 6935 6936 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6937 6938 if (ieee80211_config_bw(link, elems, true, &changed)) { 6939 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6940 WLAN_REASON_DEAUTH_LEAVING, 6941 true, deauth_buf); 6942 ieee80211_report_disconnect(sdata, deauth_buf, 6943 sizeof(deauth_buf), true, 6944 WLAN_REASON_DEAUTH_LEAVING, 6945 false); 6946 goto free; 6947 } 6948 6949 if (elems->opmode_notif) 6950 ieee80211_vht_handle_opmode(sdata, link_sta, 6951 *elems->opmode_notif, 6952 rx_status->band); 6953 6954 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6955 elems->country_elem, 6956 elems->country_elem_len, 6957 elems->pwr_constr_elem, 6958 elems->cisco_dtpc_elem); 6959 6960 ieee80211_ml_reconfiguration(sdata, elems); 6961 ieee80211_process_adv_ttlm(sdata, elems, 6962 le64_to_cpu(mgmt->u.beacon.timestamp)); 6963 6964 ieee80211_link_info_change_notify(sdata, link, changed); 6965 free: 6966 kfree(elems); 6967 } 6968 6969 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6970 struct ieee80211_neg_ttlm neg_ttlm) 6971 { 6972 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 6973 u8 i; 6974 6975 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 6976 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 6977 6978 /* If there is an active TTLM, unset previously suspended links */ 6979 if (sdata->vif.neg_ttlm.valid) 6980 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 6981 6982 /* exclude links that are already disabled by advertised TTLM */ 6983 new_active_links = 6984 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 6985 new_suspended_links = 6986 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 6987 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 6988 if (ieee80211_ttlm_set_links(sdata, new_active_links, 6989 new_dormant_links, new_suspended_links)) 6990 return; 6991 6992 sdata->vif.neg_ttlm = neg_ttlm; 6993 sdata->vif.neg_ttlm.valid = true; 6994 } 6995 6996 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 6997 struct wiphy_work *work) 6998 { 6999 struct ieee80211_sub_if_data *sdata = 7000 container_of(work, struct ieee80211_sub_if_data, 7001 u.mgd.neg_ttlm_timeout_work.work); 7002 7003 sdata_info(sdata, 7004 "No negotiated TTLM response from AP, disconnecting.\n"); 7005 7006 __ieee80211_disconnect(sdata); 7007 } 7008 7009 static void 7010 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7011 struct ieee80211_neg_ttlm *neg_ttlm) 7012 { 7013 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7014 7015 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7016 sizeof(neg_ttlm->downlink))) { 7017 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7018 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7019 } else { 7020 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7021 } 7022 7023 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7024 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7025 __le16 map; 7026 7027 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7028 7029 pos = skb_put(skb, len + 2); 7030 *pos++ = WLAN_EID_EXTENSION; 7031 len_pos = pos++; 7032 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7033 *pos++ = direction[i]; 7034 map_ind_pos = pos++; 7035 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7036 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7037 cpu_to_le16(neg_ttlm->uplink[tid]) : 7038 cpu_to_le16(neg_ttlm->downlink[tid]); 7039 if (!map) 7040 continue; 7041 7042 len += 2; 7043 map_ind |= BIT(tid); 7044 skb_put_data(skb, &map, sizeof(map)); 7045 } 7046 7047 *map_ind_pos = map_ind; 7048 *len_pos = len; 7049 7050 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7051 break; 7052 } 7053 } 7054 7055 static void 7056 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7057 struct ieee80211_neg_ttlm *neg_ttlm, 7058 u8 dialog_token) 7059 { 7060 struct ieee80211_local *local = sdata->local; 7061 struct ieee80211_mgmt *mgmt; 7062 struct sk_buff *skb; 7063 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7064 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7065 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7066 7067 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7068 if (!skb) 7069 return; 7070 7071 skb_reserve(skb, local->tx_headroom); 7072 mgmt = skb_put_zero(skb, hdr_len); 7073 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7074 IEEE80211_STYPE_ACTION); 7075 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7076 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7077 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7078 7079 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7080 mgmt->u.action.u.ttlm_req.action_code = 7081 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7082 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7083 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7084 ieee80211_tx_skb(sdata, skb); 7085 } 7086 7087 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7088 struct cfg80211_ttlm_params *params) 7089 { 7090 struct ieee80211_neg_ttlm neg_ttlm = {}; 7091 u8 i; 7092 7093 if (!ieee80211_vif_is_mld(&sdata->vif) || 7094 !(sdata->vif.cfg.mld_capa_op & 7095 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7096 return -EINVAL; 7097 7098 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7099 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7100 (params->ulink[i] & ~sdata->vif.valid_links)) 7101 return -EINVAL; 7102 7103 neg_ttlm.downlink[i] = params->dlink[i]; 7104 neg_ttlm.uplink[i] = params->ulink[i]; 7105 } 7106 7107 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7108 NEG_TTLM_RES_ACCEPT) 7109 return -EINVAL; 7110 7111 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7112 sdata->u.mgd.dialog_token_alloc++; 7113 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7114 sdata->u.mgd.dialog_token_alloc); 7115 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7116 &sdata->u.mgd.neg_ttlm_timeout_work); 7117 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7118 &sdata->u.mgd.neg_ttlm_timeout_work, 7119 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7120 return 0; 7121 } 7122 7123 static void 7124 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7125 enum ieee80211_neg_ttlm_res ttlm_res, 7126 u8 dialog_token, 7127 struct ieee80211_neg_ttlm *neg_ttlm) 7128 { 7129 struct ieee80211_local *local = sdata->local; 7130 struct ieee80211_mgmt *mgmt; 7131 struct sk_buff *skb; 7132 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7133 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7134 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7135 7136 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7137 if (!skb) 7138 return; 7139 7140 skb_reserve(skb, local->tx_headroom); 7141 mgmt = skb_put_zero(skb, hdr_len); 7142 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7143 IEEE80211_STYPE_ACTION); 7144 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7145 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7146 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7147 7148 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7149 mgmt->u.action.u.ttlm_res.action_code = 7150 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7151 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7152 switch (ttlm_res) { 7153 default: 7154 WARN_ON(1); 7155 fallthrough; 7156 case NEG_TTLM_RES_REJECT: 7157 mgmt->u.action.u.ttlm_res.status_code = 7158 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7159 break; 7160 case NEG_TTLM_RES_ACCEPT: 7161 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7162 break; 7163 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7164 mgmt->u.action.u.ttlm_res.status_code = 7165 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7166 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7167 break; 7168 } 7169 7170 ieee80211_tx_skb(sdata, skb); 7171 } 7172 7173 static int 7174 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7175 const struct ieee80211_ttlm_elem *ttlm, 7176 struct ieee80211_neg_ttlm *neg_ttlm, 7177 u8 *direction) 7178 { 7179 u8 control, link_map_presence, map_size, tid; 7180 u8 *pos; 7181 7182 /* The element size was already validated in 7183 * ieee80211_tid_to_link_map_size_ok() 7184 */ 7185 pos = (void *)ttlm->optional; 7186 7187 control = ttlm->control; 7188 7189 /* mapping switch time and expected duration fields are not expected 7190 * in case of negotiated TTLM 7191 */ 7192 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7193 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7194 mlme_dbg(sdata, 7195 "Invalid TTLM element in negotiated TTLM request\n"); 7196 return -EINVAL; 7197 } 7198 7199 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7200 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7201 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7202 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7203 } 7204 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7205 return 0; 7206 } 7207 7208 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7209 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7210 *direction != IEEE80211_TTLM_DIRECTION_UP && 7211 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7212 return -EINVAL; 7213 7214 link_map_presence = *pos; 7215 pos++; 7216 7217 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7218 map_size = 1; 7219 else 7220 map_size = 2; 7221 7222 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7223 u16 map; 7224 7225 if (link_map_presence & BIT(tid)) { 7226 map = ieee80211_get_ttlm(map_size, pos); 7227 if (!map) { 7228 mlme_dbg(sdata, 7229 "No active links for TID %d", tid); 7230 return -EINVAL; 7231 } 7232 } else { 7233 map = 0; 7234 } 7235 7236 switch (*direction) { 7237 case IEEE80211_TTLM_DIRECTION_BOTH: 7238 neg_ttlm->downlink[tid] = map; 7239 neg_ttlm->uplink[tid] = map; 7240 break; 7241 case IEEE80211_TTLM_DIRECTION_DOWN: 7242 neg_ttlm->downlink[tid] = map; 7243 break; 7244 case IEEE80211_TTLM_DIRECTION_UP: 7245 neg_ttlm->uplink[tid] = map; 7246 break; 7247 default: 7248 return -EINVAL; 7249 } 7250 pos += map_size; 7251 } 7252 return 0; 7253 } 7254 7255 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7256 struct ieee80211_mgmt *mgmt, size_t len) 7257 { 7258 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7259 size_t ies_len; 7260 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7261 struct ieee802_11_elems *elems = NULL; 7262 struct ieee80211_neg_ttlm neg_ttlm = {}; 7263 7264 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7265 7266 if (!ieee80211_vif_is_mld(&sdata->vif)) 7267 return; 7268 7269 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7270 ies_len = len - offsetof(struct ieee80211_mgmt, 7271 u.action.u.ttlm_req.variable); 7272 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7273 ies_len, true, NULL); 7274 if (!elems) { 7275 ttlm_res = NEG_TTLM_RES_REJECT; 7276 goto out; 7277 } 7278 7279 for (i = 0; i < elems->ttlm_num; i++) { 7280 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7281 &neg_ttlm, &direction[i]) || 7282 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7283 elems->ttlm_num != 1)) { 7284 ttlm_res = NEG_TTLM_RES_REJECT; 7285 goto out; 7286 } 7287 } 7288 7289 if (!elems->ttlm_num || 7290 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7291 ttlm_res = NEG_TTLM_RES_REJECT; 7292 goto out; 7293 } 7294 7295 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7296 if ((neg_ttlm.downlink[i] && 7297 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7298 (neg_ttlm.uplink[i] && 7299 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7300 ttlm_res = NEG_TTLM_RES_REJECT; 7301 goto out; 7302 } 7303 } 7304 7305 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7306 7307 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7308 goto out; 7309 7310 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7311 out: 7312 kfree(elems); 7313 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7314 } 7315 7316 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7317 struct ieee80211_mgmt *mgmt, size_t len) 7318 { 7319 if (!ieee80211_vif_is_mld(&sdata->vif) || 7320 mgmt->u.action.u.ttlm_req.dialog_token != 7321 sdata->u.mgd.dialog_token_alloc) 7322 return; 7323 7324 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7325 &sdata->u.mgd.neg_ttlm_timeout_work); 7326 7327 /* MLD station sends a TID to link mapping request, mainly to handle 7328 * BTM (BSS transition management) request, in which case it needs to 7329 * restrict the active links set. 7330 * In this case it's not expected that the MLD AP will reject the 7331 * negotiated TTLM request. 7332 * This can be better implemented in the future, to handle request 7333 * rejections. 7334 */ 7335 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7336 __ieee80211_disconnect(sdata); 7337 } 7338 7339 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7340 struct wiphy_work *work) 7341 { 7342 u16 new_dormant_links; 7343 struct ieee80211_sub_if_data *sdata = 7344 container_of(work, struct ieee80211_sub_if_data, 7345 u.mgd.teardown_ttlm_work); 7346 7347 if (!sdata->vif.neg_ttlm.valid) 7348 return; 7349 7350 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7351 new_dormant_links = 7352 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7353 sdata->vif.suspended_links = 0; 7354 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7355 new_dormant_links); 7356 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7357 BSS_CHANGED_MLD_VALID_LINKS); 7358 } 7359 7360 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7361 { 7362 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7363 struct ieee80211_local *local = sdata->local; 7364 struct ieee80211_mgmt *mgmt; 7365 struct sk_buff *skb; 7366 int frame_len = offsetofend(struct ieee80211_mgmt, 7367 u.action.u.ttlm_tear_down); 7368 struct ieee80211_tx_info *info; 7369 7370 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7371 if (!skb) 7372 return; 7373 7374 skb_reserve(skb, local->hw.extra_tx_headroom); 7375 mgmt = skb_put_zero(skb, frame_len); 7376 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7377 IEEE80211_STYPE_ACTION); 7378 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7379 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7380 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7381 7382 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7383 mgmt->u.action.u.ttlm_tear_down.action_code = 7384 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7385 7386 info = IEEE80211_SKB_CB(skb); 7387 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7388 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7389 ieee80211_tx_skb(sdata, skb); 7390 } 7391 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7392 7393 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7394 struct sk_buff *skb) 7395 { 7396 struct ieee80211_link_data *link = &sdata->deflink; 7397 struct ieee80211_rx_status *rx_status; 7398 struct ieee80211_hdr *hdr; 7399 u16 fc; 7400 7401 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7402 7403 rx_status = (struct ieee80211_rx_status *) skb->cb; 7404 hdr = (struct ieee80211_hdr *) skb->data; 7405 fc = le16_to_cpu(hdr->frame_control); 7406 7407 switch (fc & IEEE80211_FCTL_STYPE) { 7408 case IEEE80211_STYPE_S1G_BEACON: 7409 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7410 break; 7411 } 7412 } 7413 7414 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7415 struct sk_buff *skb) 7416 { 7417 struct ieee80211_link_data *link = &sdata->deflink; 7418 struct ieee80211_rx_status *rx_status; 7419 struct ieee80211_mgmt *mgmt; 7420 u16 fc; 7421 int ies_len; 7422 7423 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7424 7425 rx_status = (struct ieee80211_rx_status *) skb->cb; 7426 mgmt = (struct ieee80211_mgmt *) skb->data; 7427 fc = le16_to_cpu(mgmt->frame_control); 7428 7429 if (rx_status->link_valid) { 7430 link = sdata_dereference(sdata->link[rx_status->link_id], 7431 sdata); 7432 if (!link) 7433 return; 7434 } 7435 7436 switch (fc & IEEE80211_FCTL_STYPE) { 7437 case IEEE80211_STYPE_BEACON: 7438 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7439 skb->len, rx_status); 7440 break; 7441 case IEEE80211_STYPE_PROBE_RESP: 7442 ieee80211_rx_mgmt_probe_resp(link, skb); 7443 break; 7444 case IEEE80211_STYPE_AUTH: 7445 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7446 break; 7447 case IEEE80211_STYPE_DEAUTH: 7448 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7449 break; 7450 case IEEE80211_STYPE_DISASSOC: 7451 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7452 break; 7453 case IEEE80211_STYPE_ASSOC_RESP: 7454 case IEEE80211_STYPE_REASSOC_RESP: 7455 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7456 break; 7457 case IEEE80211_STYPE_ACTION: 7458 if (!sdata->u.mgd.associated || 7459 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7460 break; 7461 7462 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 7463 struct ieee802_11_elems *elems; 7464 7465 ies_len = skb->len - 7466 offsetof(struct ieee80211_mgmt, 7467 u.action.u.chan_switch.variable); 7468 7469 if (ies_len < 0) 7470 break; 7471 7472 /* CSA IE cannot be overridden, no need for BSSID */ 7473 elems = ieee802_11_parse_elems( 7474 mgmt->u.action.u.chan_switch.variable, 7475 ies_len, true, NULL); 7476 7477 if (elems && !elems->parse_error) 7478 ieee80211_sta_process_chanswitch(link, 7479 rx_status->mactime, 7480 rx_status->device_timestamp, 7481 elems, elems, 7482 IEEE80211_CSA_SOURCE_ACTION); 7483 kfree(elems); 7484 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 7485 struct ieee802_11_elems *elems; 7486 7487 ies_len = skb->len - 7488 offsetof(struct ieee80211_mgmt, 7489 u.action.u.ext_chan_switch.variable); 7490 7491 if (ies_len < 0) 7492 break; 7493 7494 /* 7495 * extended CSA IE can't be overridden, no need for 7496 * BSSID 7497 */ 7498 elems = ieee802_11_parse_elems( 7499 mgmt->u.action.u.ext_chan_switch.variable, 7500 ies_len, true, NULL); 7501 7502 if (elems && !elems->parse_error) { 7503 /* for the handling code pretend it was an IE */ 7504 elems->ext_chansw_ie = 7505 &mgmt->u.action.u.ext_chan_switch.data; 7506 7507 ieee80211_sta_process_chanswitch(link, 7508 rx_status->mactime, 7509 rx_status->device_timestamp, 7510 elems, elems, 7511 IEEE80211_CSA_SOURCE_ACTION); 7512 } 7513 7514 kfree(elems); 7515 } 7516 break; 7517 } 7518 } 7519 7520 static void ieee80211_sta_timer(struct timer_list *t) 7521 { 7522 struct ieee80211_sub_if_data *sdata = 7523 from_timer(sdata, t, u.mgd.timer); 7524 7525 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7526 } 7527 7528 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7529 u8 reason, bool tx) 7530 { 7531 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7532 7533 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7534 tx, frame_buf); 7535 7536 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7537 reason, false); 7538 } 7539 7540 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7541 { 7542 struct ieee80211_local *local = sdata->local; 7543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7544 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7545 u32 tx_flags = 0; 7546 u16 trans = 1; 7547 u16 status = 0; 7548 struct ieee80211_prep_tx_info info = { 7549 .subtype = IEEE80211_STYPE_AUTH, 7550 }; 7551 7552 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7553 7554 if (WARN_ON_ONCE(!auth_data)) 7555 return -EINVAL; 7556 7557 auth_data->tries++; 7558 7559 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7560 sdata_info(sdata, "authentication with %pM timed out\n", 7561 auth_data->ap_addr); 7562 7563 /* 7564 * Most likely AP is not in the range so remove the 7565 * bss struct for that AP. 7566 */ 7567 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7568 7569 return -ETIMEDOUT; 7570 } 7571 7572 if (auth_data->algorithm == WLAN_AUTH_SAE) 7573 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7574 7575 info.link_id = auth_data->link_id; 7576 drv_mgd_prepare_tx(local, sdata, &info); 7577 7578 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7579 auth_data->ap_addr, auth_data->tries, 7580 IEEE80211_AUTH_MAX_TRIES); 7581 7582 auth_data->expected_transaction = 2; 7583 7584 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7585 trans = auth_data->sae_trans; 7586 status = auth_data->sae_status; 7587 auth_data->expected_transaction = trans; 7588 } 7589 7590 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7591 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7592 IEEE80211_TX_INTFL_MLME_CONN_TX; 7593 7594 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7595 auth_data->data, auth_data->data_len, 7596 auth_data->ap_addr, auth_data->ap_addr, 7597 NULL, 0, 0, tx_flags); 7598 7599 if (tx_flags == 0) { 7600 if (auth_data->algorithm == WLAN_AUTH_SAE) 7601 auth_data->timeout = jiffies + 7602 IEEE80211_AUTH_TIMEOUT_SAE; 7603 else 7604 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7605 } else { 7606 auth_data->timeout = 7607 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7608 } 7609 7610 auth_data->timeout_started = true; 7611 run_again(sdata, auth_data->timeout); 7612 7613 return 0; 7614 } 7615 7616 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7617 { 7618 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7619 struct ieee80211_local *local = sdata->local; 7620 int ret; 7621 7622 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7623 7624 assoc_data->tries++; 7625 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7626 sdata_info(sdata, "association with %pM timed out\n", 7627 assoc_data->ap_addr); 7628 7629 /* 7630 * Most likely AP is not in the range so remove the 7631 * bss struct for that AP. 7632 */ 7633 cfg80211_unlink_bss(local->hw.wiphy, 7634 assoc_data->link[assoc_data->assoc_link_id].bss); 7635 7636 return -ETIMEDOUT; 7637 } 7638 7639 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7640 assoc_data->ap_addr, assoc_data->tries, 7641 IEEE80211_ASSOC_MAX_TRIES); 7642 ret = ieee80211_send_assoc(sdata); 7643 if (ret) 7644 return ret; 7645 7646 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7647 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7648 assoc_data->timeout_started = true; 7649 run_again(sdata, assoc_data->timeout); 7650 } else { 7651 assoc_data->timeout = 7652 round_jiffies_up(jiffies + 7653 IEEE80211_ASSOC_TIMEOUT_LONG); 7654 assoc_data->timeout_started = true; 7655 run_again(sdata, assoc_data->timeout); 7656 } 7657 7658 return 0; 7659 } 7660 7661 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7662 __le16 fc, bool acked) 7663 { 7664 struct ieee80211_local *local = sdata->local; 7665 7666 sdata->u.mgd.status_fc = fc; 7667 sdata->u.mgd.status_acked = acked; 7668 sdata->u.mgd.status_received = true; 7669 7670 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7671 } 7672 7673 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7674 { 7675 struct ieee80211_local *local = sdata->local; 7676 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7677 7678 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7679 7680 if (ifmgd->status_received) { 7681 __le16 fc = ifmgd->status_fc; 7682 bool status_acked = ifmgd->status_acked; 7683 7684 ifmgd->status_received = false; 7685 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7686 if (status_acked) { 7687 if (ifmgd->auth_data->algorithm == 7688 WLAN_AUTH_SAE) 7689 ifmgd->auth_data->timeout = 7690 jiffies + 7691 IEEE80211_AUTH_TIMEOUT_SAE; 7692 else 7693 ifmgd->auth_data->timeout = 7694 jiffies + 7695 IEEE80211_AUTH_TIMEOUT_SHORT; 7696 run_again(sdata, ifmgd->auth_data->timeout); 7697 } else { 7698 ifmgd->auth_data->timeout = jiffies - 1; 7699 } 7700 ifmgd->auth_data->timeout_started = true; 7701 } else if (ifmgd->assoc_data && 7702 !ifmgd->assoc_data->comeback && 7703 (ieee80211_is_assoc_req(fc) || 7704 ieee80211_is_reassoc_req(fc))) { 7705 /* 7706 * Update association timeout based on the TX status 7707 * for the (Re)Association Request frame. Skip this if 7708 * we have already processed a (Re)Association Response 7709 * frame that indicated need for association comeback 7710 * at a specific time in the future. This could happen 7711 * if the TX status information is delayed enough for 7712 * the response to be received and processed first. 7713 */ 7714 if (status_acked) { 7715 ifmgd->assoc_data->timeout = 7716 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7717 run_again(sdata, ifmgd->assoc_data->timeout); 7718 } else { 7719 ifmgd->assoc_data->timeout = jiffies - 1; 7720 } 7721 ifmgd->assoc_data->timeout_started = true; 7722 } 7723 } 7724 7725 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7726 time_after(jiffies, ifmgd->auth_data->timeout)) { 7727 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7728 /* 7729 * ok ... we waited for assoc or continuation but 7730 * userspace didn't do it, so kill the auth data 7731 */ 7732 ieee80211_destroy_auth_data(sdata, false); 7733 } else if (ieee80211_auth(sdata)) { 7734 u8 ap_addr[ETH_ALEN]; 7735 struct ieee80211_event event = { 7736 .type = MLME_EVENT, 7737 .u.mlme.data = AUTH_EVENT, 7738 .u.mlme.status = MLME_TIMEOUT, 7739 }; 7740 7741 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7742 7743 ieee80211_destroy_auth_data(sdata, false); 7744 7745 cfg80211_auth_timeout(sdata->dev, ap_addr); 7746 drv_event_callback(sdata->local, sdata, &event); 7747 } 7748 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7749 run_again(sdata, ifmgd->auth_data->timeout); 7750 7751 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7752 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7753 if ((ifmgd->assoc_data->need_beacon && 7754 !sdata->deflink.u.mgd.have_beacon) || 7755 ieee80211_do_assoc(sdata)) { 7756 struct ieee80211_event event = { 7757 .type = MLME_EVENT, 7758 .u.mlme.data = ASSOC_EVENT, 7759 .u.mlme.status = MLME_TIMEOUT, 7760 }; 7761 7762 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7763 drv_event_callback(sdata->local, sdata, &event); 7764 } 7765 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7766 run_again(sdata, ifmgd->assoc_data->timeout); 7767 7768 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7769 ifmgd->associated) { 7770 u8 *bssid = sdata->deflink.u.mgd.bssid; 7771 int max_tries; 7772 7773 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7774 max_tries = max_nullfunc_tries; 7775 else 7776 max_tries = max_probe_tries; 7777 7778 /* ACK received for nullfunc probing frame */ 7779 if (!ifmgd->probe_send_count) 7780 ieee80211_reset_ap_probe(sdata); 7781 else if (ifmgd->nullfunc_failed) { 7782 if (ifmgd->probe_send_count < max_tries) { 7783 mlme_dbg(sdata, 7784 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7785 bssid, ifmgd->probe_send_count, 7786 max_tries); 7787 ieee80211_mgd_probe_ap_send(sdata); 7788 } else { 7789 mlme_dbg(sdata, 7790 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7791 bssid); 7792 ieee80211_sta_connection_lost(sdata, 7793 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7794 false); 7795 } 7796 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7797 run_again(sdata, ifmgd->probe_timeout); 7798 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7799 mlme_dbg(sdata, 7800 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7801 bssid, probe_wait_ms); 7802 ieee80211_sta_connection_lost(sdata, 7803 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7804 } else if (ifmgd->probe_send_count < max_tries) { 7805 mlme_dbg(sdata, 7806 "No probe response from AP %pM after %dms, try %d/%i\n", 7807 bssid, probe_wait_ms, 7808 ifmgd->probe_send_count, max_tries); 7809 ieee80211_mgd_probe_ap_send(sdata); 7810 } else { 7811 /* 7812 * We actually lost the connection ... or did we? 7813 * Let's make sure! 7814 */ 7815 mlme_dbg(sdata, 7816 "No probe response from AP %pM after %dms, disconnecting.\n", 7817 bssid, probe_wait_ms); 7818 7819 ieee80211_sta_connection_lost(sdata, 7820 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7821 } 7822 } 7823 } 7824 7825 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7826 { 7827 struct ieee80211_sub_if_data *sdata = 7828 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7829 7830 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7831 return; 7832 7833 if (sdata->vif.bss_conf.csa_active && 7834 !sdata->deflink.u.mgd.csa.waiting_bcn) 7835 return; 7836 7837 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7838 return; 7839 7840 sdata->u.mgd.connection_loss = false; 7841 wiphy_work_queue(sdata->local->hw.wiphy, 7842 &sdata->u.mgd.beacon_connection_loss_work); 7843 } 7844 7845 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7846 { 7847 struct ieee80211_sub_if_data *sdata = 7848 from_timer(sdata, t, u.mgd.conn_mon_timer); 7849 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7850 struct ieee80211_local *local = sdata->local; 7851 struct sta_info *sta; 7852 unsigned long timeout; 7853 7854 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7855 return; 7856 7857 if (sdata->vif.bss_conf.csa_active && 7858 !sdata->deflink.u.mgd.csa.waiting_bcn) 7859 return; 7860 7861 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7862 if (!sta) 7863 return; 7864 7865 timeout = sta->deflink.status_stats.last_ack; 7866 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7867 timeout = sta->deflink.rx_stats.last_rx; 7868 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7869 7870 /* If timeout is after now, then update timer to fire at 7871 * the later date, but do not actually probe at this time. 7872 */ 7873 if (time_is_after_jiffies(timeout)) { 7874 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7875 return; 7876 } 7877 7878 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7879 } 7880 7881 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7882 struct wiphy_work *work) 7883 { 7884 struct ieee80211_sub_if_data *sdata = 7885 container_of(work, struct ieee80211_sub_if_data, 7886 u.mgd.monitor_work); 7887 7888 ieee80211_mgd_probe_ap(sdata, false); 7889 } 7890 7891 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7892 { 7893 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7894 __ieee80211_stop_poll(sdata); 7895 7896 /* let's probe the connection once */ 7897 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7898 wiphy_work_queue(sdata->local->hw.wiphy, 7899 &sdata->u.mgd.monitor_work); 7900 } 7901 } 7902 7903 #ifdef CONFIG_PM 7904 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7905 { 7906 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7907 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7908 7909 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7910 7911 if (ifmgd->auth_data || ifmgd->assoc_data) { 7912 const u8 *ap_addr = ifmgd->auth_data ? 7913 ifmgd->auth_data->ap_addr : 7914 ifmgd->assoc_data->ap_addr; 7915 7916 /* 7917 * If we are trying to authenticate / associate while suspending, 7918 * cfg80211 won't know and won't actually abort those attempts, 7919 * thus we need to do that ourselves. 7920 */ 7921 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7922 IEEE80211_STYPE_DEAUTH, 7923 WLAN_REASON_DEAUTH_LEAVING, 7924 false, frame_buf); 7925 if (ifmgd->assoc_data) 7926 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7927 if (ifmgd->auth_data) 7928 ieee80211_destroy_auth_data(sdata, false); 7929 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7930 IEEE80211_DEAUTH_FRAME_LEN, 7931 false); 7932 } 7933 7934 /* This is a bit of a hack - we should find a better and more generic 7935 * solution to this. Normally when suspending, cfg80211 will in fact 7936 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7937 * auth (not so important) or assoc (this is the problem) process. 7938 * 7939 * As a consequence, it can happen that we are in the process of both 7940 * associating and suspending, and receive an association response 7941 * after cfg80211 has checked if it needs to disconnect, but before 7942 * we actually set the flag to drop incoming frames. This will then 7943 * cause the workqueue flush to process the association response in 7944 * the suspend, resulting in a successful association just before it 7945 * tries to remove the interface from the driver, which now though 7946 * has a channel context assigned ... this results in issues. 7947 * 7948 * To work around this (for now) simply deauth here again if we're 7949 * now connected. 7950 */ 7951 if (ifmgd->associated && !sdata->local->wowlan) { 7952 u8 bssid[ETH_ALEN]; 7953 struct cfg80211_deauth_request req = { 7954 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 7955 .bssid = bssid, 7956 }; 7957 7958 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7959 ieee80211_mgd_deauth(sdata, &req); 7960 } 7961 } 7962 #endif 7963 7964 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 7965 { 7966 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7967 7968 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7969 7970 if (!ifmgd->associated) 7971 return; 7972 7973 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 7974 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 7975 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 7976 ieee80211_sta_connection_lost(sdata, 7977 WLAN_REASON_UNSPECIFIED, 7978 true); 7979 return; 7980 } 7981 7982 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 7983 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 7984 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 7985 ieee80211_sta_connection_lost(sdata, 7986 WLAN_REASON_UNSPECIFIED, 7987 true); 7988 return; 7989 } 7990 } 7991 7992 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 7993 struct wiphy_work *work) 7994 { 7995 struct ieee80211_link_data *link = 7996 container_of(work, struct ieee80211_link_data, 7997 u.mgd.request_smps_work); 7998 7999 __ieee80211_request_smps_mgd(link->sdata, link, 8000 link->u.mgd.driver_smps_mode); 8001 } 8002 8003 /* interface setup */ 8004 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8005 { 8006 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8007 8008 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8009 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8010 ieee80211_beacon_connection_loss_work); 8011 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8012 ieee80211_csa_connection_drop_work); 8013 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8014 ieee80211_tdls_peer_del_work); 8015 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8016 ieee80211_ml_reconf_work); 8017 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8018 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8019 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8020 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8021 ieee80211_sta_handle_tspec_ac_params_wk); 8022 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8023 ieee80211_tid_to_link_map_work); 8024 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8025 ieee80211_neg_ttlm_timeout_work); 8026 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8027 ieee80211_teardown_ttlm_work); 8028 8029 ifmgd->flags = 0; 8030 ifmgd->powersave = sdata->wdev.ps; 8031 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8032 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8033 /* Setup TDLS data */ 8034 spin_lock_init(&ifmgd->teardown_lock); 8035 ifmgd->teardown_skb = NULL; 8036 ifmgd->orig_teardown_skb = NULL; 8037 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8038 } 8039 8040 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8041 struct wiphy_work *work) 8042 { 8043 struct ieee80211_link_data *link = 8044 container_of(work, struct ieee80211_link_data, 8045 u.mgd.recalc_smps); 8046 8047 ieee80211_recalc_smps(link->sdata, link); 8048 } 8049 8050 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8051 { 8052 struct ieee80211_sub_if_data *sdata = link->sdata; 8053 struct ieee80211_local *local = sdata->local; 8054 unsigned int link_id = link->link_id; 8055 8056 link->u.mgd.p2p_noa_index = -1; 8057 link->conf->bssid = link->u.mgd.bssid; 8058 link->smps_mode = IEEE80211_SMPS_OFF; 8059 8060 wiphy_work_init(&link->u.mgd.request_smps_work, 8061 ieee80211_request_smps_mgd_work); 8062 wiphy_work_init(&link->u.mgd.recalc_smps, 8063 ieee80211_recalc_smps_work); 8064 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8065 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8066 else 8067 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8068 8069 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8070 ieee80211_csa_switch_work); 8071 8072 ieee80211_clear_tpe(&link->conf->tpe); 8073 8074 if (sdata->u.mgd.assoc_data) 8075 ether_addr_copy(link->conf->addr, 8076 sdata->u.mgd.assoc_data->link[link_id].addr); 8077 else if (!is_valid_ether_addr(link->conf->addr)) 8078 eth_random_addr(link->conf->addr); 8079 } 8080 8081 /* scan finished notification */ 8082 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8083 { 8084 struct ieee80211_sub_if_data *sdata; 8085 8086 /* Restart STA timers */ 8087 rcu_read_lock(); 8088 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8089 if (ieee80211_sdata_running(sdata)) 8090 ieee80211_restart_sta_timer(sdata); 8091 } 8092 rcu_read_unlock(); 8093 } 8094 8095 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8096 struct cfg80211_bss *cbss, s8 link_id, 8097 const u8 *ap_mld_addr, bool assoc, 8098 struct ieee80211_conn_settings *conn, 8099 bool override) 8100 { 8101 struct ieee80211_local *local = sdata->local; 8102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8103 struct ieee80211_bss *bss = (void *)cbss->priv; 8104 struct sta_info *new_sta = NULL; 8105 struct ieee80211_link_data *link; 8106 bool have_sta = false; 8107 bool mlo; 8108 int err; 8109 8110 if (link_id >= 0) { 8111 mlo = true; 8112 if (WARN_ON(!ap_mld_addr)) 8113 return -EINVAL; 8114 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8115 } else { 8116 if (WARN_ON(ap_mld_addr)) 8117 return -EINVAL; 8118 ap_mld_addr = cbss->bssid; 8119 err = ieee80211_vif_set_links(sdata, 0, 0); 8120 link_id = 0; 8121 mlo = false; 8122 } 8123 8124 if (err) 8125 return err; 8126 8127 link = sdata_dereference(sdata->link[link_id], sdata); 8128 if (WARN_ON(!link)) { 8129 err = -ENOLINK; 8130 goto out_err; 8131 } 8132 8133 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8134 err = -EINVAL; 8135 goto out_err; 8136 } 8137 8138 /* If a reconfig is happening, bail out */ 8139 if (local->in_reconfig) { 8140 err = -EBUSY; 8141 goto out_err; 8142 } 8143 8144 if (assoc) { 8145 rcu_read_lock(); 8146 have_sta = sta_info_get(sdata, ap_mld_addr); 8147 rcu_read_unlock(); 8148 } 8149 8150 if (!have_sta) { 8151 if (mlo) 8152 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8153 link_id, cbss->bssid, 8154 GFP_KERNEL); 8155 else 8156 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8157 8158 if (!new_sta) { 8159 err = -ENOMEM; 8160 goto out_err; 8161 } 8162 8163 new_sta->sta.mlo = mlo; 8164 } 8165 8166 /* 8167 * Set up the information for the new channel before setting the 8168 * new channel. We can't - completely race-free - change the basic 8169 * rates bitmap and the channel (sband) that it refers to, but if 8170 * we set it up before we at least avoid calling into the driver's 8171 * bss_info_changed() method with invalid information (since we do 8172 * call that from changing the channel - only for IDLE and perhaps 8173 * some others, but ...). 8174 * 8175 * So to avoid that, just set up all the new information before the 8176 * channel, but tell the driver to apply it only afterwards, since 8177 * it might need the new channel for that. 8178 */ 8179 if (new_sta) { 8180 const struct cfg80211_bss_ies *ies; 8181 struct link_sta_info *link_sta; 8182 8183 rcu_read_lock(); 8184 link_sta = rcu_dereference(new_sta->link[link_id]); 8185 if (WARN_ON(!link_sta)) { 8186 rcu_read_unlock(); 8187 sta_info_free(local, new_sta); 8188 err = -EINVAL; 8189 goto out_err; 8190 } 8191 8192 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8193 link_sta, cbss); 8194 if (err) { 8195 rcu_read_unlock(); 8196 sta_info_free(local, new_sta); 8197 goto out_err; 8198 } 8199 8200 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8201 8202 /* set timing information */ 8203 link->conf->beacon_int = cbss->beacon_interval; 8204 ies = rcu_dereference(cbss->beacon_ies); 8205 if (ies) { 8206 link->conf->sync_tsf = ies->tsf; 8207 link->conf->sync_device_ts = 8208 bss->device_ts_beacon; 8209 8210 ieee80211_get_dtim(ies, 8211 &link->conf->sync_dtim_count, 8212 NULL); 8213 } else if (!ieee80211_hw_check(&sdata->local->hw, 8214 TIMING_BEACON_ONLY)) { 8215 ies = rcu_dereference(cbss->proberesp_ies); 8216 /* must be non-NULL since beacon IEs were NULL */ 8217 link->conf->sync_tsf = ies->tsf; 8218 link->conf->sync_device_ts = 8219 bss->device_ts_presp; 8220 link->conf->sync_dtim_count = 0; 8221 } else { 8222 link->conf->sync_tsf = 0; 8223 link->conf->sync_device_ts = 0; 8224 link->conf->sync_dtim_count = 0; 8225 } 8226 rcu_read_unlock(); 8227 } 8228 8229 if (new_sta || override) { 8230 /* 8231 * Only set this if we're also going to calculate the AP 8232 * settings etc., otherwise this was set before in a 8233 * previous call. Note override is set to %true in assoc 8234 * if the settings were changed. 8235 */ 8236 link->u.mgd.conn = *conn; 8237 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8238 mlo, &link->u.mgd.conn); 8239 if (err) { 8240 if (new_sta) 8241 sta_info_free(local, new_sta); 8242 goto out_err; 8243 } 8244 /* pass out for use in assoc */ 8245 *conn = link->u.mgd.conn; 8246 } 8247 8248 if (new_sta) { 8249 /* 8250 * tell driver about BSSID, basic rates and timing 8251 * this was set up above, before setting the channel 8252 */ 8253 ieee80211_link_info_change_notify(sdata, link, 8254 BSS_CHANGED_BSSID | 8255 BSS_CHANGED_BASIC_RATES | 8256 BSS_CHANGED_BEACON_INT); 8257 8258 if (assoc) 8259 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8260 8261 err = sta_info_insert(new_sta); 8262 new_sta = NULL; 8263 if (err) { 8264 sdata_info(sdata, 8265 "failed to insert STA entry for the AP (error %d)\n", 8266 err); 8267 goto out_release_chan; 8268 } 8269 } else 8270 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8271 8272 /* Cancel scan to ensure that nothing interferes with connection */ 8273 if (local->scanning) 8274 ieee80211_scan_cancel(local); 8275 8276 return 0; 8277 8278 out_release_chan: 8279 ieee80211_link_release_channel(link); 8280 out_err: 8281 ieee80211_vif_set_links(sdata, 0, 0); 8282 return err; 8283 } 8284 8285 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8286 const struct cfg80211_bss_ies *ies, 8287 u8 cur_channel, bool ignore_ecsa) 8288 { 8289 const struct element *csa_elem, *ecsa_elem; 8290 struct ieee80211_channel_sw_ie *csa = NULL; 8291 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8292 8293 if (!ies) 8294 return false; 8295 8296 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8297 ies->data, ies->len); 8298 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8299 csa = (void *)csa_elem->data; 8300 8301 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8302 ies->data, ies->len); 8303 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8304 ecsa = (void *)ecsa_elem->data; 8305 8306 if (csa && csa->count == 0) 8307 csa = NULL; 8308 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8309 csa = NULL; 8310 8311 if (ecsa && ecsa->count == 0) 8312 ecsa = NULL; 8313 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8314 ecsa = NULL; 8315 8316 if (ignore_ecsa && ecsa) { 8317 sdata_info(sdata, 8318 "Ignoring ECSA in probe response - was considered stuck!\n"); 8319 return csa; 8320 } 8321 8322 return csa || ecsa; 8323 } 8324 8325 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8326 struct cfg80211_bss *bss) 8327 { 8328 u8 cur_channel; 8329 bool ret; 8330 8331 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8332 8333 rcu_read_lock(); 8334 if (ieee80211_mgd_csa_present(sdata, 8335 rcu_dereference(bss->beacon_ies), 8336 cur_channel, false)) { 8337 ret = true; 8338 goto out; 8339 } 8340 8341 if (ieee80211_mgd_csa_present(sdata, 8342 rcu_dereference(bss->proberesp_ies), 8343 cur_channel, bss->proberesp_ecsa_stuck)) { 8344 ret = true; 8345 goto out; 8346 } 8347 8348 ret = false; 8349 out: 8350 rcu_read_unlock(); 8351 return ret; 8352 } 8353 8354 /* config hooks */ 8355 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8356 struct cfg80211_auth_request *req) 8357 { 8358 struct ieee80211_local *local = sdata->local; 8359 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8360 struct ieee80211_mgd_auth_data *auth_data; 8361 struct ieee80211_conn_settings conn; 8362 struct ieee80211_link_data *link; 8363 struct ieee80211_supported_band *sband; 8364 struct ieee80211_bss *bss; 8365 u16 auth_alg; 8366 int err; 8367 bool cont_auth, wmm_used; 8368 8369 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8370 8371 /* prepare auth data structure */ 8372 8373 switch (req->auth_type) { 8374 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8375 auth_alg = WLAN_AUTH_OPEN; 8376 break; 8377 case NL80211_AUTHTYPE_SHARED_KEY: 8378 if (fips_enabled) 8379 return -EOPNOTSUPP; 8380 auth_alg = WLAN_AUTH_SHARED_KEY; 8381 break; 8382 case NL80211_AUTHTYPE_FT: 8383 auth_alg = WLAN_AUTH_FT; 8384 break; 8385 case NL80211_AUTHTYPE_NETWORK_EAP: 8386 auth_alg = WLAN_AUTH_LEAP; 8387 break; 8388 case NL80211_AUTHTYPE_SAE: 8389 auth_alg = WLAN_AUTH_SAE; 8390 break; 8391 case NL80211_AUTHTYPE_FILS_SK: 8392 auth_alg = WLAN_AUTH_FILS_SK; 8393 break; 8394 case NL80211_AUTHTYPE_FILS_SK_PFS: 8395 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8396 break; 8397 case NL80211_AUTHTYPE_FILS_PK: 8398 auth_alg = WLAN_AUTH_FILS_PK; 8399 break; 8400 default: 8401 return -EOPNOTSUPP; 8402 } 8403 8404 if (ifmgd->assoc_data) 8405 return -EBUSY; 8406 8407 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8408 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8409 return -EINVAL; 8410 } 8411 8412 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8413 req->ie_len, GFP_KERNEL); 8414 if (!auth_data) 8415 return -ENOMEM; 8416 8417 memcpy(auth_data->ap_addr, 8418 req->ap_mld_addr ?: req->bss->bssid, 8419 ETH_ALEN); 8420 auth_data->bss = req->bss; 8421 auth_data->link_id = req->link_id; 8422 8423 if (req->auth_data_len >= 4) { 8424 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8425 __le16 *pos = (__le16 *) req->auth_data; 8426 8427 auth_data->sae_trans = le16_to_cpu(pos[0]); 8428 auth_data->sae_status = le16_to_cpu(pos[1]); 8429 } 8430 memcpy(auth_data->data, req->auth_data + 4, 8431 req->auth_data_len - 4); 8432 auth_data->data_len += req->auth_data_len - 4; 8433 } 8434 8435 /* Check if continuing authentication or trying to authenticate with the 8436 * same BSS that we were in the process of authenticating with and avoid 8437 * removal and re-addition of the STA entry in 8438 * ieee80211_prep_connection(). 8439 */ 8440 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8441 ifmgd->auth_data->link_id == req->link_id; 8442 8443 if (req->ie && req->ie_len) { 8444 memcpy(&auth_data->data[auth_data->data_len], 8445 req->ie, req->ie_len); 8446 auth_data->data_len += req->ie_len; 8447 } 8448 8449 if (req->key && req->key_len) { 8450 auth_data->key_len = req->key_len; 8451 auth_data->key_idx = req->key_idx; 8452 memcpy(auth_data->key, req->key, req->key_len); 8453 } 8454 8455 auth_data->algorithm = auth_alg; 8456 8457 /* try to authenticate/probe */ 8458 8459 if (ifmgd->auth_data) { 8460 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8461 auth_data->peer_confirmed = 8462 ifmgd->auth_data->peer_confirmed; 8463 } 8464 ieee80211_destroy_auth_data(sdata, cont_auth); 8465 } 8466 8467 /* prep auth_data so we don't go into idle on disassoc */ 8468 ifmgd->auth_data = auth_data; 8469 8470 /* If this is continuation of an ongoing SAE authentication exchange 8471 * (i.e., request to send SAE Confirm) and the peer has already 8472 * confirmed, mark authentication completed since we are about to send 8473 * out SAE Confirm. 8474 */ 8475 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8476 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8477 ieee80211_mark_sta_auth(sdata); 8478 8479 if (ifmgd->associated) { 8480 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8481 8482 sdata_info(sdata, 8483 "disconnect from AP %pM for new auth to %pM\n", 8484 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8485 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8486 WLAN_REASON_UNSPECIFIED, 8487 false, frame_buf); 8488 8489 ieee80211_report_disconnect(sdata, frame_buf, 8490 sizeof(frame_buf), true, 8491 WLAN_REASON_UNSPECIFIED, 8492 false); 8493 } 8494 8495 /* needed for transmitting the auth frame(s) properly */ 8496 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8497 8498 bss = (void *)req->bss->priv; 8499 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8500 8501 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8502 8503 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8504 &conn); 8505 8506 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8507 req->ap_mld_addr, cont_auth, 8508 &conn, false); 8509 if (err) 8510 goto err_clear; 8511 8512 if (req->link_id >= 0) 8513 link = sdata_dereference(sdata->link[req->link_id], sdata); 8514 else 8515 link = &sdata->deflink; 8516 8517 if (WARN_ON(!link)) { 8518 err = -ENOLINK; 8519 goto err_clear; 8520 } 8521 8522 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8523 auth_data->ap_addr, link->conf->addr); 8524 8525 err = ieee80211_auth(sdata); 8526 if (err) { 8527 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8528 goto err_clear; 8529 } 8530 8531 /* hold our own reference */ 8532 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8533 return 0; 8534 8535 err_clear: 8536 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8537 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8538 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8539 BSS_CHANGED_BSSID); 8540 ieee80211_link_release_channel(&sdata->deflink); 8541 } 8542 ifmgd->auth_data = NULL; 8543 kfree(auth_data); 8544 return err; 8545 } 8546 8547 static void 8548 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8549 struct ieee80211_mgd_assoc_data *assoc_data, 8550 struct cfg80211_assoc_request *req, 8551 struct ieee80211_conn_settings *conn, 8552 unsigned int link_id) 8553 { 8554 struct ieee80211_local *local = sdata->local; 8555 const struct cfg80211_bss_ies *bss_ies; 8556 struct ieee80211_supported_band *sband; 8557 struct ieee80211_link_data *link; 8558 struct cfg80211_bss *cbss; 8559 struct ieee80211_bss *bss; 8560 8561 cbss = assoc_data->link[link_id].bss; 8562 if (WARN_ON(!cbss)) 8563 return; 8564 8565 bss = (void *)cbss->priv; 8566 8567 sband = local->hw.wiphy->bands[cbss->channel->band]; 8568 if (WARN_ON(!sband)) 8569 return; 8570 8571 link = sdata_dereference(sdata->link[link_id], sdata); 8572 if (WARN_ON(!link)) 8573 return; 8574 8575 /* for MLO connections assume advertising all rates is OK */ 8576 if (!req->ap_mld_addr) { 8577 assoc_data->supp_rates = bss->supp_rates; 8578 assoc_data->supp_rates_len = bss->supp_rates_len; 8579 } 8580 8581 /* copy and link elems for the STA profile */ 8582 if (req->links[link_id].elems_len) { 8583 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8584 req->links[link_id].elems_len); 8585 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8586 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8587 assoc_data->ie_pos += req->links[link_id].elems_len; 8588 } 8589 8590 link->u.mgd.beacon_crc_valid = false; 8591 link->u.mgd.dtim_period = 0; 8592 link->u.mgd.have_beacon = false; 8593 8594 /* override HT configuration only if the AP and we support it */ 8595 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8596 struct ieee80211_sta_ht_cap sta_ht_cap; 8597 8598 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8599 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8600 } 8601 8602 rcu_read_lock(); 8603 bss_ies = rcu_dereference(cbss->beacon_ies); 8604 if (bss_ies) { 8605 u8 dtim_count = 0; 8606 8607 ieee80211_get_dtim(bss_ies, &dtim_count, 8608 &link->u.mgd.dtim_period); 8609 8610 sdata->deflink.u.mgd.have_beacon = true; 8611 8612 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8613 link->conf->sync_tsf = bss_ies->tsf; 8614 link->conf->sync_device_ts = bss->device_ts_beacon; 8615 link->conf->sync_dtim_count = dtim_count; 8616 } 8617 } else { 8618 bss_ies = rcu_dereference(cbss->ies); 8619 } 8620 8621 if (bss_ies) { 8622 const struct element *elem; 8623 8624 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8625 bss_ies->data, bss_ies->len); 8626 if (elem && elem->datalen >= 3) 8627 link->conf->profile_periodicity = elem->data[2]; 8628 else 8629 link->conf->profile_periodicity = 0; 8630 8631 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8632 bss_ies->data, bss_ies->len); 8633 if (elem && elem->datalen >= 11 && 8634 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8635 link->conf->ema_ap = true; 8636 else 8637 link->conf->ema_ap = false; 8638 } 8639 rcu_read_unlock(); 8640 8641 if (bss->corrupt_data) { 8642 char *corrupt_type = "data"; 8643 8644 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8645 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8646 corrupt_type = "beacon and probe response"; 8647 else 8648 corrupt_type = "beacon"; 8649 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8650 corrupt_type = "probe response"; 8651 } 8652 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8653 cbss->bssid, corrupt_type); 8654 } 8655 8656 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8657 if (sdata->u.mgd.powersave) 8658 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8659 else 8660 link->smps_mode = IEEE80211_SMPS_OFF; 8661 } else { 8662 link->smps_mode = link->u.mgd.req_smps; 8663 } 8664 } 8665 8666 static int 8667 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8668 struct ieee80211_mgd_assoc_data *assoc_data, 8669 int link_id) 8670 { 8671 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8672 enum nl80211_band band = cbss->channel->band; 8673 struct ieee80211_supported_band *sband; 8674 const struct element *elem; 8675 int err; 8676 8677 /* neither HT nor VHT elements used on 6 GHz */ 8678 if (band == NL80211_BAND_6GHZ) 8679 return 0; 8680 8681 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8682 return 0; 8683 8684 rcu_read_lock(); 8685 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8686 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8687 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8688 cbss->bssid); 8689 err = -EINVAL; 8690 goto out_rcu; 8691 } 8692 assoc_data->link[link_id].ap_ht_param = 8693 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8694 rcu_read_unlock(); 8695 8696 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8697 return 0; 8698 8699 /* some drivers want to support VHT on 2.4 GHz even */ 8700 sband = sdata->local->hw.wiphy->bands[band]; 8701 if (!sband->vht_cap.vht_supported) 8702 return 0; 8703 8704 rcu_read_lock(); 8705 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8706 /* but even then accept it not being present on the AP */ 8707 if (!elem && band == NL80211_BAND_2GHZ) { 8708 err = 0; 8709 goto out_rcu; 8710 } 8711 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8712 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8713 cbss->bssid); 8714 err = -EINVAL; 8715 goto out_rcu; 8716 } 8717 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8718 sizeof(struct ieee80211_vht_cap)); 8719 rcu_read_unlock(); 8720 8721 return 0; 8722 out_rcu: 8723 rcu_read_unlock(); 8724 return err; 8725 } 8726 8727 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8728 struct cfg80211_assoc_request *req) 8729 { 8730 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8731 struct ieee80211_local *local = sdata->local; 8732 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8733 struct ieee80211_mgd_assoc_data *assoc_data; 8734 const struct element *ssid_elem; 8735 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8736 struct ieee80211_link_data *link; 8737 struct cfg80211_bss *cbss; 8738 bool override, uapsd_supported; 8739 bool match_auth; 8740 int i, err; 8741 size_t size = sizeof(*assoc_data) + req->ie_len; 8742 8743 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8744 size += req->links[i].elems_len; 8745 8746 /* FIXME: no support for 4-addr MLO yet */ 8747 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8748 return -EOPNOTSUPP; 8749 8750 assoc_data = kzalloc(size, GFP_KERNEL); 8751 if (!assoc_data) 8752 return -ENOMEM; 8753 8754 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8755 8756 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8757 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8758 err = -EINVAL; 8759 goto err_free; 8760 } 8761 8762 rcu_read_lock(); 8763 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8764 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8765 rcu_read_unlock(); 8766 err = -EINVAL; 8767 goto err_free; 8768 } 8769 8770 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8771 assoc_data->ssid_len = ssid_elem->datalen; 8772 rcu_read_unlock(); 8773 8774 if (req->ap_mld_addr) 8775 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8776 else 8777 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8778 8779 if (ifmgd->associated) { 8780 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8781 8782 sdata_info(sdata, 8783 "disconnect from AP %pM for new assoc to %pM\n", 8784 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8785 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8786 WLAN_REASON_UNSPECIFIED, 8787 false, frame_buf); 8788 8789 ieee80211_report_disconnect(sdata, frame_buf, 8790 sizeof(frame_buf), true, 8791 WLAN_REASON_UNSPECIFIED, 8792 false); 8793 } 8794 8795 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8796 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8797 sizeof(ifmgd->ht_capa_mask)); 8798 8799 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8800 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8801 sizeof(ifmgd->vht_capa_mask)); 8802 8803 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8804 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8805 sizeof(ifmgd->s1g_capa_mask)); 8806 8807 /* keep some setup (AP STA, channel, ...) if matching */ 8808 match_auth = ifmgd->auth_data && 8809 ether_addr_equal(ifmgd->auth_data->ap_addr, 8810 assoc_data->ap_addr) && 8811 ifmgd->auth_data->link_id == req->link_id; 8812 8813 if (req->ap_mld_addr) { 8814 uapsd_supported = true; 8815 8816 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8817 ASSOC_REQ_DISABLE_VHT | 8818 ASSOC_REQ_DISABLE_HE | 8819 ASSOC_REQ_DISABLE_EHT)) { 8820 err = -EINVAL; 8821 goto err_free; 8822 } 8823 8824 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8825 struct ieee80211_supported_band *sband; 8826 struct cfg80211_bss *link_cbss = req->links[i].bss; 8827 struct ieee80211_bss *bss; 8828 8829 if (!link_cbss) 8830 continue; 8831 8832 bss = (void *)link_cbss->priv; 8833 8834 if (!bss->wmm_used) { 8835 err = -EINVAL; 8836 req->links[i].error = err; 8837 goto err_free; 8838 } 8839 8840 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8841 err = -EINVAL; 8842 req->links[i].error = err; 8843 goto err_free; 8844 } 8845 8846 link = sdata_dereference(sdata->link[i], sdata); 8847 if (link) 8848 ether_addr_copy(assoc_data->link[i].addr, 8849 link->conf->addr); 8850 else 8851 eth_random_addr(assoc_data->link[i].addr); 8852 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8853 8854 if (match_auth && i == assoc_link_id && link) 8855 assoc_data->link[i].conn = link->u.mgd.conn; 8856 else 8857 assoc_data->link[i].conn = 8858 ieee80211_conn_settings_unlimited; 8859 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8860 req, true, i, 8861 &assoc_data->link[i].conn); 8862 assoc_data->link[i].bss = link_cbss; 8863 assoc_data->link[i].disabled = req->links[i].disabled; 8864 8865 if (!bss->uapsd_supported) 8866 uapsd_supported = false; 8867 8868 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 8869 err = -EINVAL; 8870 req->links[i].error = err; 8871 goto err_free; 8872 } 8873 8874 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 8875 assoc_data, i); 8876 if (err) { 8877 err = -EINVAL; 8878 req->links[i].error = err; 8879 goto err_free; 8880 } 8881 } 8882 8883 assoc_data->wmm = true; 8884 } else { 8885 struct ieee80211_supported_band *sband; 8886 struct ieee80211_bss *bss = (void *)cbss->priv; 8887 8888 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8889 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8890 8891 assoc_data->wmm = bss->wmm_used && 8892 (local->hw.queues >= IEEE80211_NUM_ACS); 8893 8894 if (cbss->channel->band == NL80211_BAND_6GHZ && 8895 req->flags & (ASSOC_REQ_DISABLE_HT | 8896 ASSOC_REQ_DISABLE_VHT | 8897 ASSOC_REQ_DISABLE_HE)) { 8898 err = -EINVAL; 8899 goto err_free; 8900 } 8901 8902 sband = local->hw.wiphy->bands[cbss->channel->band]; 8903 8904 assoc_data->link[0].bss = cbss; 8905 8906 if (match_auth) 8907 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 8908 else 8909 assoc_data->link[0].conn = 8910 ieee80211_conn_settings_unlimited; 8911 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 8912 assoc_data->wmm, 0, 8913 &assoc_data->link[0].conn); 8914 8915 uapsd_supported = bss->uapsd_supported; 8916 8917 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 8918 if (err) 8919 goto err_free; 8920 } 8921 8922 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8923 8924 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8925 err = -EBUSY; 8926 goto err_free; 8927 } 8928 8929 if (ifmgd->assoc_data) { 8930 err = -EBUSY; 8931 goto err_free; 8932 } 8933 8934 /* Cleanup is delayed if auth_data matches */ 8935 if (ifmgd->auth_data && !match_auth) 8936 ieee80211_destroy_auth_data(sdata, false); 8937 8938 if (req->ie && req->ie_len) { 8939 memcpy(assoc_data->ie, req->ie, req->ie_len); 8940 assoc_data->ie_len = req->ie_len; 8941 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 8942 } else { 8943 assoc_data->ie_pos = assoc_data->ie; 8944 } 8945 8946 if (req->fils_kek) { 8947 /* should already be checked in cfg80211 - so warn */ 8948 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 8949 err = -EINVAL; 8950 goto err_free; 8951 } 8952 memcpy(assoc_data->fils_kek, req->fils_kek, 8953 req->fils_kek_len); 8954 assoc_data->fils_kek_len = req->fils_kek_len; 8955 } 8956 8957 if (req->fils_nonces) 8958 memcpy(assoc_data->fils_nonces, req->fils_nonces, 8959 2 * FILS_NONCE_LEN); 8960 8961 /* default timeout */ 8962 assoc_data->timeout = jiffies; 8963 assoc_data->timeout_started = true; 8964 8965 assoc_data->assoc_link_id = assoc_link_id; 8966 8967 if (req->ap_mld_addr) { 8968 /* if there was no authentication, set up the link */ 8969 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 8970 if (err) 8971 goto err_clear; 8972 } 8973 8974 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 8975 if (WARN_ON(!link)) { 8976 err = -EINVAL; 8977 goto err_clear; 8978 } 8979 8980 override = link->u.mgd.conn.mode != 8981 assoc_data->link[assoc_link_id].conn.mode || 8982 link->u.mgd.conn.bw_limit != 8983 assoc_data->link[assoc_link_id].conn.bw_limit; 8984 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 8985 8986 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 8987 assoc_link_id); 8988 8989 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 8990 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 8991 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 8992 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 8993 8994 if (assoc_data->wmm && uapsd_supported && 8995 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 8996 assoc_data->uapsd = true; 8997 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 8998 } else { 8999 assoc_data->uapsd = false; 9000 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9001 } 9002 9003 if (req->prev_bssid) 9004 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9005 9006 if (req->use_mfp) { 9007 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9008 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9009 } else { 9010 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9011 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9012 } 9013 9014 if (req->flags & ASSOC_REQ_USE_RRM) 9015 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9016 else 9017 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9018 9019 if (req->crypto.control_port) 9020 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9021 else 9022 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9023 9024 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9025 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9026 sdata->control_port_over_nl80211 = 9027 req->crypto.control_port_over_nl80211; 9028 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9029 9030 /* kick off associate process */ 9031 ifmgd->assoc_data = assoc_data; 9032 9033 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9034 if (!assoc_data->link[i].bss) 9035 continue; 9036 if (i == assoc_data->assoc_link_id) 9037 continue; 9038 /* only calculate the mode, hence link == NULL */ 9039 err = ieee80211_prep_channel(sdata, NULL, i, 9040 assoc_data->link[i].bss, true, 9041 &assoc_data->link[i].conn); 9042 if (err) { 9043 req->links[i].error = err; 9044 goto err_clear; 9045 } 9046 } 9047 9048 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9049 vif_cfg->ssid_len = assoc_data->ssid_len; 9050 9051 /* needed for transmitting the assoc frames properly */ 9052 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9053 9054 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9055 req->ap_mld_addr, true, 9056 &assoc_data->link[assoc_link_id].conn, 9057 override); 9058 if (err) 9059 goto err_clear; 9060 9061 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9062 const struct cfg80211_bss_ies *beacon_ies; 9063 9064 rcu_read_lock(); 9065 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9066 if (!beacon_ies) { 9067 /* 9068 * Wait up to one beacon interval ... 9069 * should this be more if we miss one? 9070 */ 9071 sdata_info(sdata, "waiting for beacon from %pM\n", 9072 link->u.mgd.bssid); 9073 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9074 assoc_data->timeout_started = true; 9075 assoc_data->need_beacon = true; 9076 } 9077 rcu_read_unlock(); 9078 } 9079 9080 run_again(sdata, assoc_data->timeout); 9081 9082 /* We are associating, clean up auth_data */ 9083 if (ifmgd->auth_data) 9084 ieee80211_destroy_auth_data(sdata, true); 9085 9086 return 0; 9087 err_clear: 9088 if (!ifmgd->auth_data) { 9089 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9090 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9091 BSS_CHANGED_BSSID); 9092 } 9093 ifmgd->assoc_data = NULL; 9094 err_free: 9095 kfree(assoc_data); 9096 return err; 9097 } 9098 9099 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9100 struct cfg80211_deauth_request *req) 9101 { 9102 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9103 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9104 bool tx = !req->local_state_change; 9105 struct ieee80211_prep_tx_info info = { 9106 .subtype = IEEE80211_STYPE_DEAUTH, 9107 }; 9108 9109 if (ifmgd->auth_data && 9110 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9111 sdata_info(sdata, 9112 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9113 req->bssid, req->reason_code, 9114 ieee80211_get_reason_code_string(req->reason_code)); 9115 9116 info.link_id = ifmgd->auth_data->link_id; 9117 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9118 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9119 IEEE80211_STYPE_DEAUTH, 9120 req->reason_code, tx, 9121 frame_buf); 9122 ieee80211_destroy_auth_data(sdata, false); 9123 ieee80211_report_disconnect(sdata, frame_buf, 9124 sizeof(frame_buf), true, 9125 req->reason_code, false); 9126 drv_mgd_complete_tx(sdata->local, sdata, &info); 9127 return 0; 9128 } 9129 9130 if (ifmgd->assoc_data && 9131 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9132 sdata_info(sdata, 9133 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9134 req->bssid, req->reason_code, 9135 ieee80211_get_reason_code_string(req->reason_code)); 9136 9137 info.link_id = ifmgd->assoc_data->assoc_link_id; 9138 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9139 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9140 IEEE80211_STYPE_DEAUTH, 9141 req->reason_code, tx, 9142 frame_buf); 9143 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9144 ieee80211_report_disconnect(sdata, frame_buf, 9145 sizeof(frame_buf), true, 9146 req->reason_code, false); 9147 drv_mgd_complete_tx(sdata->local, sdata, &info); 9148 return 0; 9149 } 9150 9151 if (ifmgd->associated && 9152 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9153 sdata_info(sdata, 9154 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9155 req->bssid, req->reason_code, 9156 ieee80211_get_reason_code_string(req->reason_code)); 9157 9158 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9159 req->reason_code, tx, frame_buf); 9160 ieee80211_report_disconnect(sdata, frame_buf, 9161 sizeof(frame_buf), true, 9162 req->reason_code, false); 9163 drv_mgd_complete_tx(sdata->local, sdata, &info); 9164 return 0; 9165 } 9166 9167 return -ENOTCONN; 9168 } 9169 9170 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9171 struct cfg80211_disassoc_request *req) 9172 { 9173 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9174 9175 if (!sdata->u.mgd.associated || 9176 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9177 return -ENOTCONN; 9178 9179 sdata_info(sdata, 9180 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9181 req->ap_addr, req->reason_code, 9182 ieee80211_get_reason_code_string(req->reason_code)); 9183 9184 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9185 req->reason_code, !req->local_state_change, 9186 frame_buf); 9187 9188 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9189 req->reason_code, false); 9190 9191 return 0; 9192 } 9193 9194 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9195 { 9196 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9197 &link->u.mgd.request_smps_work); 9198 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9199 &link->u.mgd.recalc_smps); 9200 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9201 &link->u.mgd.csa.switch_work); 9202 } 9203 9204 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9205 { 9206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9207 9208 /* 9209 * Make sure some work items will not run after this, 9210 * they will not do anything but might not have been 9211 * cancelled when disconnecting. 9212 */ 9213 wiphy_work_cancel(sdata->local->hw.wiphy, 9214 &ifmgd->monitor_work); 9215 wiphy_work_cancel(sdata->local->hw.wiphy, 9216 &ifmgd->beacon_connection_loss_work); 9217 wiphy_work_cancel(sdata->local->hw.wiphy, 9218 &ifmgd->csa_connection_drop_work); 9219 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9220 &ifmgd->tdls_peer_del_work); 9221 9222 if (ifmgd->assoc_data) 9223 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9224 if (ifmgd->auth_data) 9225 ieee80211_destroy_auth_data(sdata, false); 9226 spin_lock_bh(&ifmgd->teardown_lock); 9227 if (ifmgd->teardown_skb) { 9228 kfree_skb(ifmgd->teardown_skb); 9229 ifmgd->teardown_skb = NULL; 9230 ifmgd->orig_teardown_skb = NULL; 9231 } 9232 kfree(ifmgd->assoc_req_ies); 9233 ifmgd->assoc_req_ies = NULL; 9234 ifmgd->assoc_req_ies_len = 0; 9235 spin_unlock_bh(&ifmgd->teardown_lock); 9236 del_timer_sync(&ifmgd->timer); 9237 } 9238 9239 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9240 enum nl80211_cqm_rssi_threshold_event rssi_event, 9241 s32 rssi_level, 9242 gfp_t gfp) 9243 { 9244 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9245 9246 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9247 9248 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9249 } 9250 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9251 9252 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9253 { 9254 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9255 9256 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9257 9258 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9259 } 9260 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9261 9262 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9263 int rssi_min_thold, 9264 int rssi_max_thold) 9265 { 9266 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9267 9268 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9269 return; 9270 9271 /* 9272 * Scale up threshold values before storing it, as the RSSI averaging 9273 * algorithm uses a scaled up value as well. Change this scaling 9274 * factor if the RSSI averaging algorithm changes. 9275 */ 9276 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9277 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9278 } 9279 9280 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9281 int rssi_min_thold, 9282 int rssi_max_thold) 9283 { 9284 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9285 9286 WARN_ON(rssi_min_thold == rssi_max_thold || 9287 rssi_min_thold > rssi_max_thold); 9288 9289 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9290 rssi_max_thold); 9291 } 9292 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9293 9294 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9295 { 9296 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9297 9298 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9299 } 9300 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9301