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 return true; 603 } 604 605 static struct ieee802_11_elems * 606 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 607 struct ieee80211_conn_settings *conn, 608 struct cfg80211_bss *cbss, int link_id, 609 struct ieee80211_chan_req *chanreq) 610 { 611 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 612 struct ieee80211_bss *bss = (void *)cbss->priv; 613 struct ieee80211_channel *channel = cbss->channel; 614 struct ieee80211_elems_parse_params parse_params = { 615 .link_id = -1, 616 .from_ap = true, 617 .start = ies->data, 618 .len = ies->len, 619 .mode = conn->mode, 620 }; 621 struct ieee802_11_elems *elems; 622 struct ieee80211_supported_band *sband; 623 struct cfg80211_chan_def ap_chandef; 624 enum ieee80211_conn_mode ap_mode; 625 int ret; 626 627 again: 628 elems = ieee802_11_parse_elems_full(&parse_params); 629 if (!elems) 630 return ERR_PTR(-ENOMEM); 631 632 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 633 elems, false, conn, &ap_chandef); 634 635 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 636 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 637 638 /* this should be impossible since parsing depends on our mode */ 639 if (WARN_ON(ap_mode > conn->mode)) { 640 ret = -EINVAL; 641 goto free; 642 } 643 644 sband = sdata->local->hw.wiphy->bands[channel->band]; 645 646 switch (channel->band) { 647 case NL80211_BAND_S1GHZ: 648 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 649 ret = -EINVAL; 650 goto free; 651 } 652 return elems; 653 case NL80211_BAND_6GHZ: 654 if (ap_mode < IEEE80211_CONN_MODE_HE) { 655 sdata_info(sdata, 656 "Rejecting non-HE 6/7 GHz connection"); 657 ret = -EINVAL; 658 goto free; 659 } 660 break; 661 default: 662 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 663 ret = -EINVAL; 664 goto free; 665 } 666 } 667 668 switch (ap_mode) { 669 case IEEE80211_CONN_MODE_S1G: 670 WARN_ON(1); 671 ret = -EINVAL; 672 goto free; 673 case IEEE80211_CONN_MODE_LEGACY: 674 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 675 break; 676 case IEEE80211_CONN_MODE_HT: 677 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 678 conn->bw_limit, 679 IEEE80211_CONN_BW_LIMIT_40); 680 break; 681 case IEEE80211_CONN_MODE_VHT: 682 case IEEE80211_CONN_MODE_HE: 683 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 684 conn->bw_limit, 685 IEEE80211_CONN_BW_LIMIT_160); 686 break; 687 case IEEE80211_CONN_MODE_EHT: 688 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 689 conn->bw_limit, 690 IEEE80211_CONN_BW_LIMIT_320); 691 break; 692 } 693 694 conn->mode = ap_mode; 695 chanreq->oper = ap_chandef; 696 697 /* wider-bandwidth OFDMA is only done in EHT */ 698 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 699 !(sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW)) 700 chanreq->ap = ap_chandef; 701 else 702 chanreq->ap.chan = NULL; 703 704 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 705 IEEE80211_CHAN_DISABLED)) { 706 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 707 ret = -EINVAL; 708 goto free; 709 } 710 711 ieee80211_chanreq_downgrade(chanreq, conn); 712 } 713 714 if (conn->mode >= IEEE80211_CONN_MODE_HE && 715 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 716 IEEE80211_CHAN_NO_HE)) { 717 conn->mode = IEEE80211_CONN_MODE_VHT; 718 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 719 conn->bw_limit, 720 IEEE80211_CONN_BW_LIMIT_160); 721 } 722 723 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 724 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 725 IEEE80211_CHAN_NO_EHT)) { 726 conn->mode = IEEE80211_CONN_MODE_HE; 727 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 728 conn->bw_limit, 729 IEEE80211_CONN_BW_LIMIT_160); 730 } 731 732 if (chanreq->oper.width != ap_chandef.width || ap_mode != conn->mode) 733 sdata_info(sdata, 734 "regulatory prevented using AP config, downgraded\n"); 735 736 if (conn->mode >= IEEE80211_CONN_MODE_HE && 737 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 738 elems->he_operation) || 739 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 740 elems->he_operation))) { 741 conn->mode = IEEE80211_CONN_MODE_VHT; 742 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 743 } 744 745 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 746 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 747 elems->eht_operation)) { 748 conn->mode = IEEE80211_CONN_MODE_HE; 749 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 750 conn->bw_limit, 751 IEEE80211_CONN_BW_LIMIT_160); 752 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 753 } 754 755 /* the mode can only decrease, so this must terminate */ 756 if (ap_mode != conn->mode) 757 goto again; 758 759 mlme_link_id_dbg(sdata, link_id, 760 "connecting with %s mode, max bandwidth %d MHz\n", 761 ieee80211_conn_mode_str(conn->mode), 762 20 * (1 << conn->bw_limit)); 763 764 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 765 ret = -EINVAL; 766 goto free; 767 } 768 769 return elems; 770 free: 771 kfree(elems); 772 return ERR_PTR(ret); 773 } 774 775 static int ieee80211_config_bw(struct ieee80211_link_data *link, 776 struct ieee802_11_elems *elems, 777 bool update, u64 *changed) 778 { 779 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 780 struct ieee80211_sub_if_data *sdata = link->sdata; 781 struct ieee80211_chan_req chanreq = {}; 782 enum ieee80211_conn_mode ap_mode; 783 u32 vht_cap_info = 0; 784 u16 ht_opmode; 785 int ret; 786 787 /* don't track any bandwidth changes in legacy/S1G modes */ 788 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 789 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 790 return 0; 791 792 if (elems->vht_cap_elem) 793 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 794 795 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 796 elems, true, &link->u.mgd.conn, 797 &chanreq.ap); 798 799 if (ap_mode != link->u.mgd.conn.mode) { 800 link_info(link, 801 "AP appears to change mode (expected %s, found %s), disconnect\n", 802 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 803 ieee80211_conn_mode_str(ap_mode)); 804 return -EINVAL; 805 } 806 807 chanreq.oper = chanreq.ap; 808 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT || 809 sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 810 chanreq.ap.chan = NULL; 811 812 /* 813 * if HT operation mode changed store the new one - 814 * this may be applicable even if channel is identical 815 */ 816 if (elems->ht_operation) { 817 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 818 if (link->conf->ht_operation_mode != ht_opmode) { 819 *changed |= BSS_CHANGED_HT; 820 link->conf->ht_operation_mode = ht_opmode; 821 } 822 } 823 824 /* 825 * Downgrade the new channel if we associated with restricted 826 * bandwidth capabilities. For example, if we associated as a 827 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 828 * or config reasons) then switching to a 40 MHz channel now 829 * won't do us any good -- we couldn't use it with the AP. 830 */ 831 while (link->u.mgd.conn.bw_limit < 832 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 833 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 834 835 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 836 return 0; 837 838 link_info(link, 839 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 840 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 841 chanreq.oper.chan->freq_offset, chanreq.oper.width, 842 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 843 chanreq.oper.center_freq2); 844 845 if (!cfg80211_chandef_valid(&chanreq.oper)) { 846 sdata_info(sdata, 847 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 848 link->u.mgd.bssid); 849 return -EINVAL; 850 } 851 852 if (!update) { 853 link->conf->chanreq = chanreq; 854 return 0; 855 } 856 857 /* 858 * We're tracking the current AP here, so don't do any further checks 859 * here. This keeps us from playing ping-pong with regulatory, without 860 * it the following can happen (for example): 861 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 862 * - AP advertises regdom US 863 * - CRDA loads regdom US with 80 MHz prohibited (old database) 864 * - we detect an unsupported channel and disconnect 865 * - disconnect causes CRDA to reload world regdomain and the game 866 * starts anew. 867 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 868 * 869 * It seems possible that there are still scenarios with CSA or real 870 * bandwidth changes where a this could happen, but those cases are 871 * less common and wouldn't completely prevent using the AP. 872 */ 873 874 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 875 if (ret) { 876 sdata_info(sdata, 877 "AP %pM changed bandwidth to incompatible one - disconnect\n", 878 link->u.mgd.bssid); 879 return ret; 880 } 881 882 cfg80211_schedule_channels_check(&sdata->wdev); 883 return 0; 884 } 885 886 /* frame sending functions */ 887 888 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 889 struct sk_buff *skb, u8 ap_ht_param, 890 struct ieee80211_supported_band *sband, 891 struct ieee80211_channel *channel, 892 enum ieee80211_smps_mode smps, 893 const struct ieee80211_conn_settings *conn) 894 { 895 u8 *pos; 896 u32 flags = channel->flags; 897 u16 cap; 898 struct ieee80211_sta_ht_cap ht_cap; 899 900 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 901 902 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 903 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 904 905 /* determine capability flags */ 906 cap = ht_cap.cap; 907 908 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 909 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 910 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 911 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 912 cap &= ~IEEE80211_HT_CAP_SGI_40; 913 } 914 break; 915 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 916 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 917 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 918 cap &= ~IEEE80211_HT_CAP_SGI_40; 919 } 920 break; 921 } 922 923 /* 924 * If 40 MHz was disabled associate as though we weren't 925 * capable of 40 MHz -- some broken APs will never fall 926 * back to trying to transmit in 20 MHz. 927 */ 928 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 929 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 930 cap &= ~IEEE80211_HT_CAP_SGI_40; 931 } 932 933 /* set SM PS mode properly */ 934 cap &= ~IEEE80211_HT_CAP_SM_PS; 935 switch (smps) { 936 case IEEE80211_SMPS_AUTOMATIC: 937 case IEEE80211_SMPS_NUM_MODES: 938 WARN_ON(1); 939 fallthrough; 940 case IEEE80211_SMPS_OFF: 941 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 942 IEEE80211_HT_CAP_SM_PS_SHIFT; 943 break; 944 case IEEE80211_SMPS_STATIC: 945 cap |= WLAN_HT_CAP_SM_PS_STATIC << 946 IEEE80211_HT_CAP_SM_PS_SHIFT; 947 break; 948 case IEEE80211_SMPS_DYNAMIC: 949 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 950 IEEE80211_HT_CAP_SM_PS_SHIFT; 951 break; 952 } 953 954 /* reserve and fill IE */ 955 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 956 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 957 } 958 959 /* This function determines vht capability flags for the association 960 * and builds the IE. 961 * Note - the function returns true to own the MU-MIMO capability 962 */ 963 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 964 struct sk_buff *skb, 965 struct ieee80211_supported_band *sband, 966 struct ieee80211_vht_cap *ap_vht_cap, 967 const struct ieee80211_conn_settings *conn) 968 { 969 struct ieee80211_local *local = sdata->local; 970 u8 *pos; 971 u32 cap; 972 struct ieee80211_sta_vht_cap vht_cap; 973 u32 mask, ap_bf_sts, our_bf_sts; 974 bool mu_mimo_owner = false; 975 976 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 977 978 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 979 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 980 981 /* determine capability flags */ 982 cap = vht_cap.cap; 983 984 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 985 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 986 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 987 } 988 989 /* 990 * Some APs apparently get confused if our capabilities are better 991 * than theirs, so restrict what we advertise in the assoc request. 992 */ 993 if (!(ap_vht_cap->vht_cap_info & 994 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 995 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 996 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 997 else if (!(ap_vht_cap->vht_cap_info & 998 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 999 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1000 1001 /* 1002 * If some other vif is using the MU-MIMO capability we cannot associate 1003 * using MU-MIMO - this will lead to contradictions in the group-id 1004 * mechanism. 1005 * Ownership is defined since association request, in order to avoid 1006 * simultaneous associations with MU-MIMO. 1007 */ 1008 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1009 bool disable_mu_mimo = false; 1010 struct ieee80211_sub_if_data *other; 1011 1012 list_for_each_entry_rcu(other, &local->interfaces, list) { 1013 if (other->vif.bss_conf.mu_mimo_owner) { 1014 disable_mu_mimo = true; 1015 break; 1016 } 1017 } 1018 if (disable_mu_mimo) 1019 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1020 else 1021 mu_mimo_owner = true; 1022 } 1023 1024 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1025 1026 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1027 our_bf_sts = cap & mask; 1028 1029 if (ap_bf_sts < our_bf_sts) { 1030 cap &= ~mask; 1031 cap |= ap_bf_sts; 1032 } 1033 1034 /* reserve and fill IE */ 1035 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1036 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1037 1038 return mu_mimo_owner; 1039 } 1040 1041 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1042 enum nl80211_chan_width width, 1043 struct ieee80211_supported_band *sband, 1044 struct ieee80211_mgd_assoc_data *assoc_data) 1045 { 1046 u32 rates; 1047 1048 if (assoc_data->supp_rates_len) { 1049 /* 1050 * Get all rates supported by the device and the AP as 1051 * some APs don't like getting a superset of their rates 1052 * in the association request (e.g. D-Link DAP 1353 in 1053 * b-only mode)... 1054 */ 1055 ieee80211_parse_bitrates(width, sband, 1056 assoc_data->supp_rates, 1057 assoc_data->supp_rates_len, 1058 &rates); 1059 } else { 1060 /* 1061 * In case AP not provide any supported rates information 1062 * before association, we send information element(s) with 1063 * all rates that we support. 1064 */ 1065 rates = ~0; 1066 } 1067 1068 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1069 WLAN_EID_SUPP_RATES); 1070 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1071 WLAN_EID_EXT_SUPP_RATES); 1072 } 1073 1074 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1075 const u8 *elems, 1076 size_t elems_len, 1077 size_t offset) 1078 { 1079 size_t noffset; 1080 1081 static const u8 before_ht[] = { 1082 WLAN_EID_SSID, 1083 WLAN_EID_SUPP_RATES, 1084 WLAN_EID_EXT_SUPP_RATES, 1085 WLAN_EID_PWR_CAPABILITY, 1086 WLAN_EID_SUPPORTED_CHANNELS, 1087 WLAN_EID_RSN, 1088 WLAN_EID_QOS_CAPA, 1089 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1090 WLAN_EID_MOBILITY_DOMAIN, 1091 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1092 WLAN_EID_RIC_DATA, /* reassoc only */ 1093 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1094 }; 1095 static const u8 after_ric[] = { 1096 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1097 WLAN_EID_HT_CAPABILITY, 1098 WLAN_EID_BSS_COEX_2040, 1099 /* luckily this is almost always there */ 1100 WLAN_EID_EXT_CAPABILITY, 1101 WLAN_EID_QOS_TRAFFIC_CAPA, 1102 WLAN_EID_TIM_BCAST_REQ, 1103 WLAN_EID_INTERWORKING, 1104 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1105 WLAN_EID_VHT_CAPABILITY, 1106 WLAN_EID_OPMODE_NOTIF, 1107 }; 1108 1109 if (!elems_len) 1110 return offset; 1111 1112 noffset = ieee80211_ie_split_ric(elems, elems_len, 1113 before_ht, 1114 ARRAY_SIZE(before_ht), 1115 after_ric, 1116 ARRAY_SIZE(after_ric), 1117 offset); 1118 skb_put_data(skb, elems + offset, noffset - offset); 1119 1120 return noffset; 1121 } 1122 1123 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1124 const u8 *elems, 1125 size_t elems_len, 1126 size_t offset) 1127 { 1128 static const u8 before_vht[] = { 1129 /* 1130 * no need to list the ones split off before HT 1131 * or generated here 1132 */ 1133 WLAN_EID_BSS_COEX_2040, 1134 WLAN_EID_EXT_CAPABILITY, 1135 WLAN_EID_QOS_TRAFFIC_CAPA, 1136 WLAN_EID_TIM_BCAST_REQ, 1137 WLAN_EID_INTERWORKING, 1138 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1139 }; 1140 size_t noffset; 1141 1142 if (!elems_len) 1143 return offset; 1144 1145 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1146 noffset = ieee80211_ie_split(elems, elems_len, 1147 before_vht, ARRAY_SIZE(before_vht), 1148 offset); 1149 skb_put_data(skb, elems + offset, noffset - offset); 1150 1151 return noffset; 1152 } 1153 1154 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1155 const u8 *elems, 1156 size_t elems_len, 1157 size_t offset) 1158 { 1159 static const u8 before_he[] = { 1160 /* 1161 * no need to list the ones split off before VHT 1162 * or generated here 1163 */ 1164 WLAN_EID_OPMODE_NOTIF, 1165 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1166 /* 11ai elements */ 1167 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1168 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1169 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1170 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1171 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1172 /* TODO: add 11ah/11aj/11ak elements */ 1173 }; 1174 size_t noffset; 1175 1176 if (!elems_len) 1177 return offset; 1178 1179 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1180 noffset = ieee80211_ie_split(elems, elems_len, 1181 before_he, ARRAY_SIZE(before_he), 1182 offset); 1183 skb_put_data(skb, elems + offset, noffset - offset); 1184 1185 return noffset; 1186 } 1187 1188 #define PRESENT_ELEMS_MAX 8 1189 #define PRESENT_ELEM_EXT_OFFS 0x100 1190 1191 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1192 struct sk_buff *skb, u16 capab, 1193 const struct element *ext_capa, 1194 const u16 *present_elems); 1195 1196 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1197 struct sk_buff *skb, u16 *capab, 1198 const struct element *ext_capa, 1199 const u8 *extra_elems, 1200 size_t extra_elems_len, 1201 unsigned int link_id, 1202 struct ieee80211_link_data *link, 1203 u16 *present_elems) 1204 { 1205 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1206 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1207 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1208 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1209 struct ieee80211_channel *chan = cbss->channel; 1210 const struct ieee80211_sband_iftype_data *iftd; 1211 struct ieee80211_local *local = sdata->local; 1212 struct ieee80211_supported_band *sband; 1213 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1214 struct ieee80211_chanctx_conf *chanctx_conf; 1215 enum ieee80211_smps_mode smps_mode; 1216 u16 orig_capab = *capab; 1217 size_t offset = 0; 1218 int present_elems_len = 0; 1219 u8 *pos; 1220 int i; 1221 1222 #define ADD_PRESENT_ELEM(id) do { \ 1223 /* need a last for termination - we use 0 == SSID */ \ 1224 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1225 present_elems[present_elems_len++] = (id); \ 1226 } while (0) 1227 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1228 1229 if (link) 1230 smps_mode = link->smps_mode; 1231 else if (sdata->u.mgd.powersave) 1232 smps_mode = IEEE80211_SMPS_DYNAMIC; 1233 else 1234 smps_mode = IEEE80211_SMPS_OFF; 1235 1236 if (link) { 1237 /* 1238 * 5/10 MHz scenarios are only viable without MLO, in which 1239 * case this pointer should be used ... All of this is a bit 1240 * unclear though, not sure this even works at all. 1241 */ 1242 rcu_read_lock(); 1243 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1244 if (chanctx_conf) 1245 width = chanctx_conf->def.width; 1246 rcu_read_unlock(); 1247 } 1248 1249 sband = local->hw.wiphy->bands[chan->band]; 1250 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1251 1252 if (sband->band == NL80211_BAND_2GHZ) { 1253 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1254 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1255 } 1256 1257 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1258 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1259 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1260 1261 if (sband->band != NL80211_BAND_S1GHZ) 1262 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1263 1264 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1265 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1266 struct cfg80211_chan_def chandef = { 1267 .width = width, 1268 .chan = chan, 1269 }; 1270 1271 pos = skb_put(skb, 4); 1272 *pos++ = WLAN_EID_PWR_CAPABILITY; 1273 *pos++ = 2; 1274 *pos++ = 0; /* min tx power */ 1275 /* max tx power */ 1276 *pos++ = ieee80211_chandef_max_power(&chandef); 1277 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1278 } 1279 1280 /* 1281 * Per spec, we shouldn't include the list of channels if we advertise 1282 * support for extended channel switching, but we've always done that; 1283 * (for now?) apply this restriction only on the (new) 6 GHz band. 1284 */ 1285 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1286 (sband->band != NL80211_BAND_6GHZ || 1287 !ext_capa || ext_capa->datalen < 1 || 1288 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1289 /* TODO: get this in reg domain format */ 1290 pos = skb_put(skb, 2 * sband->n_channels + 2); 1291 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1292 *pos++ = 2 * sband->n_channels; 1293 for (i = 0; i < sband->n_channels; i++) { 1294 int cf = sband->channels[i].center_freq; 1295 1296 *pos++ = ieee80211_frequency_to_channel(cf); 1297 *pos++ = 1; /* one channel in the subband*/ 1298 } 1299 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1300 } 1301 1302 /* if present, add any custom IEs that go before HT */ 1303 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1304 extra_elems_len, 1305 offset); 1306 1307 if (sband->band != NL80211_BAND_6GHZ && 1308 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1309 ieee80211_add_ht_ie(sdata, skb, 1310 assoc_data->link[link_id].ap_ht_param, 1311 sband, chan, smps_mode, 1312 &assoc_data->link[link_id].conn); 1313 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1314 } 1315 1316 /* if present, add any custom IEs that go before VHT */ 1317 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1318 extra_elems_len, 1319 offset); 1320 1321 if (sband->band != NL80211_BAND_6GHZ && 1322 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT) { 1323 bool mu_mimo_owner = 1324 ieee80211_add_vht_ie(sdata, skb, sband, 1325 &assoc_data->link[link_id].ap_vht_cap, 1326 &assoc_data->link[link_id].conn); 1327 1328 if (link) 1329 link->conf->mu_mimo_owner = mu_mimo_owner; 1330 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1331 } 1332 1333 /* if present, add any custom IEs that go before HE */ 1334 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1335 extra_elems_len, 1336 offset); 1337 1338 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1339 ieee80211_put_he_cap(skb, sdata, sband, 1340 &assoc_data->link[link_id].conn); 1341 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1342 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1343 } 1344 1345 /* 1346 * careful - need to know about all the present elems before 1347 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1348 * we're going to put it after the ML element 1349 */ 1350 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1351 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1352 1353 if (link_id == assoc_data->assoc_link_id) 1354 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1355 present_elems); 1356 1357 /* crash if somebody gets it wrong */ 1358 present_elems = NULL; 1359 1360 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1361 ieee80211_put_eht_cap(skb, sdata, sband, 1362 &assoc_data->link[link_id].conn); 1363 1364 if (sband->band == NL80211_BAND_S1GHZ) { 1365 ieee80211_add_aid_request_ie(sdata, skb); 1366 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1367 } 1368 1369 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1370 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1371 1372 return offset; 1373 } 1374 1375 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1376 const u16 *outer, 1377 const u16 *inner) 1378 { 1379 unsigned int skb_len = skb->len; 1380 bool at_extension = false; 1381 bool added = false; 1382 int i, j; 1383 u8 *len, *list_len = NULL; 1384 1385 skb_put_u8(skb, WLAN_EID_EXTENSION); 1386 len = skb_put(skb, 1); 1387 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1388 1389 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1390 u16 elem = outer[i]; 1391 bool have_inner = false; 1392 1393 /* should at least be sorted in the sense of normal -> ext */ 1394 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1395 1396 /* switch to extension list */ 1397 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1398 at_extension = true; 1399 if (!list_len) 1400 skb_put_u8(skb, 0); 1401 list_len = NULL; 1402 } 1403 1404 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1405 if (elem == inner[j]) { 1406 have_inner = true; 1407 break; 1408 } 1409 } 1410 1411 if (have_inner) 1412 continue; 1413 1414 if (!list_len) { 1415 list_len = skb_put(skb, 1); 1416 *list_len = 0; 1417 } 1418 *list_len += 1; 1419 skb_put_u8(skb, (u8)elem); 1420 added = true; 1421 } 1422 1423 /* if we added a list but no extension list, make a zero-len one */ 1424 if (added && (!at_extension || !list_len)) 1425 skb_put_u8(skb, 0); 1426 1427 /* if nothing added remove extension element completely */ 1428 if (!added) 1429 skb_trim(skb, skb_len); 1430 else 1431 *len = skb->len - skb_len - 2; 1432 } 1433 1434 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1435 struct sk_buff *skb, u16 capab, 1436 const struct element *ext_capa, 1437 const u16 *outer_present_elems) 1438 { 1439 struct ieee80211_local *local = sdata->local; 1440 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1441 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1442 struct ieee80211_multi_link_elem *ml_elem; 1443 struct ieee80211_mle_basic_common_info *common; 1444 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1445 __le16 eml_capa = 0, mld_capa_ops = 0; 1446 unsigned int link_id; 1447 u8 *ml_elem_len; 1448 void *capab_pos; 1449 1450 if (!ieee80211_vif_is_mld(&sdata->vif)) 1451 return; 1452 1453 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1454 ieee80211_vif_type_p2p(&sdata->vif)); 1455 if (ift_ext_capa) { 1456 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1457 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1458 } 1459 1460 skb_put_u8(skb, WLAN_EID_EXTENSION); 1461 ml_elem_len = skb_put(skb, 1); 1462 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1463 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1464 ml_elem->control = 1465 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1466 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1467 common = skb_put(skb, sizeof(*common)); 1468 common->len = sizeof(*common) + 1469 2; /* MLD capa/ops */ 1470 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1471 1472 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1473 if (eml_capa & 1474 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1475 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1476 common->len += 2; /* EML capabilities */ 1477 ml_elem->control |= 1478 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1479 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1480 } 1481 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1482 1483 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1484 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1485 const u8 *extra_elems; 1486 size_t extra_elems_len; 1487 size_t extra_used; 1488 u8 *subelem_len = NULL; 1489 __le16 ctrl; 1490 1491 if (!assoc_data->link[link_id].bss || 1492 link_id == assoc_data->assoc_link_id) 1493 continue; 1494 1495 extra_elems = assoc_data->link[link_id].elems; 1496 extra_elems_len = assoc_data->link[link_id].elems_len; 1497 1498 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1499 subelem_len = skb_put(skb, 1); 1500 1501 ctrl = cpu_to_le16(link_id | 1502 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1503 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1504 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1505 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1506 skb_put_data(skb, assoc_data->link[link_id].addr, 1507 ETH_ALEN); 1508 /* 1509 * Now add the contents of the (re)association request, 1510 * but the "listen interval" and "current AP address" 1511 * (if applicable) are skipped. So we only have 1512 * the capability field (remember the position and fill 1513 * later), followed by the elements added below by 1514 * calling ieee80211_assoc_link_elems(). 1515 */ 1516 capab_pos = skb_put(skb, 2); 1517 1518 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1519 ext_capa, 1520 extra_elems, 1521 extra_elems_len, 1522 link_id, NULL, 1523 link_present_elems); 1524 if (extra_elems) 1525 skb_put_data(skb, extra_elems + extra_used, 1526 extra_elems_len - extra_used); 1527 1528 put_unaligned_le16(capab, capab_pos); 1529 1530 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1531 link_present_elems); 1532 1533 ieee80211_fragment_element(skb, subelem_len, 1534 IEEE80211_MLE_SUBELEM_FRAGMENT); 1535 } 1536 1537 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1538 } 1539 1540 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1541 { 1542 struct ieee80211_local *local = sdata->local; 1543 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1544 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1545 struct ieee80211_link_data *link; 1546 struct sk_buff *skb; 1547 struct ieee80211_mgmt *mgmt; 1548 u8 *pos, qos_info, *ie_start; 1549 size_t offset, noffset; 1550 u16 capab = 0, link_capab; 1551 __le16 listen_int; 1552 struct element *ext_capa = NULL; 1553 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1554 struct ieee80211_prep_tx_info info = {}; 1555 unsigned int link_id, n_links = 0; 1556 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1557 void *capab_pos; 1558 size_t size; 1559 int ret; 1560 1561 /* we know it's writable, cast away the const */ 1562 if (assoc_data->ie_len) 1563 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1564 assoc_data->ie, 1565 assoc_data->ie_len); 1566 1567 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1568 1569 size = local->hw.extra_tx_headroom + 1570 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1571 2 + assoc_data->ssid_len + /* SSID */ 1572 assoc_data->ie_len + /* extra IEs */ 1573 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1574 9; /* WMM */ 1575 1576 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1577 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1578 const struct ieee80211_sband_iftype_data *iftd; 1579 struct ieee80211_supported_band *sband; 1580 1581 if (!cbss) 1582 continue; 1583 1584 sband = local->hw.wiphy->bands[cbss->channel->band]; 1585 1586 n_links++; 1587 /* add STA profile elements length */ 1588 size += assoc_data->link[link_id].elems_len; 1589 /* and supported rates length */ 1590 size += 4 + sband->n_bitrates; 1591 /* supported channels */ 1592 size += 2 + 2 * sband->n_channels; 1593 1594 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1595 if (iftd) 1596 size += iftd->vendor_elems.len; 1597 1598 /* power capability */ 1599 size += 4; 1600 1601 /* HT, VHT, HE, EHT */ 1602 size += 2 + sizeof(struct ieee80211_ht_cap); 1603 size += 2 + sizeof(struct ieee80211_vht_cap); 1604 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1605 sizeof(struct ieee80211_he_mcs_nss_supp) + 1606 IEEE80211_HE_PPE_THRES_MAX_LEN; 1607 1608 if (sband->band == NL80211_BAND_6GHZ) 1609 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1610 1611 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1612 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1613 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1614 1615 /* non-inheritance element */ 1616 size += 2 + 2 + PRESENT_ELEMS_MAX; 1617 1618 /* should be the same across all BSSes */ 1619 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1620 capab |= WLAN_CAPABILITY_PRIVACY; 1621 } 1622 1623 if (ieee80211_vif_is_mld(&sdata->vif)) { 1624 /* consider the multi-link element with STA profile */ 1625 size += sizeof(struct ieee80211_multi_link_elem); 1626 /* max common info field in basic multi-link element */ 1627 size += sizeof(struct ieee80211_mle_basic_common_info) + 1628 2 + /* capa & op */ 1629 2; /* EML capa */ 1630 1631 /* 1632 * The capability elements were already considered above; 1633 * note this over-estimates a bit because there's no 1634 * STA profile for the assoc link. 1635 */ 1636 size += (n_links - 1) * 1637 (1 + 1 + /* subelement ID/length */ 1638 2 + /* STA control */ 1639 1 + ETH_ALEN + 2 /* STA Info field */); 1640 } 1641 1642 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1643 if (WARN_ON(!link)) 1644 return -EINVAL; 1645 1646 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1647 return -EINVAL; 1648 1649 skb = alloc_skb(size, GFP_KERNEL); 1650 if (!skb) 1651 return -ENOMEM; 1652 1653 skb_reserve(skb, local->hw.extra_tx_headroom); 1654 1655 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1656 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1657 1658 /* Set MBSSID support for HE AP if needed */ 1659 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1660 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1661 ext_capa && ext_capa->datalen >= 3) 1662 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1663 1664 mgmt = skb_put_zero(skb, 24); 1665 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1666 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1667 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1668 1669 listen_int = cpu_to_le16(assoc_data->s1g ? 1670 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1671 local->hw.conf.listen_interval); 1672 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1673 skb_put(skb, 10); 1674 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1675 IEEE80211_STYPE_REASSOC_REQ); 1676 capab_pos = &mgmt->u.reassoc_req.capab_info; 1677 mgmt->u.reassoc_req.listen_interval = listen_int; 1678 memcpy(mgmt->u.reassoc_req.current_ap, 1679 assoc_data->prev_ap_addr, ETH_ALEN); 1680 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1681 } else { 1682 skb_put(skb, 4); 1683 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1684 IEEE80211_STYPE_ASSOC_REQ); 1685 capab_pos = &mgmt->u.assoc_req.capab_info; 1686 mgmt->u.assoc_req.listen_interval = listen_int; 1687 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1688 } 1689 1690 /* SSID */ 1691 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1692 ie_start = pos; 1693 *pos++ = WLAN_EID_SSID; 1694 *pos++ = assoc_data->ssid_len; 1695 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1696 1697 /* 1698 * This bit is technically reserved, so it shouldn't matter for either 1699 * the AP or us, but it also means we shouldn't set it. However, we've 1700 * always set it in the past, and apparently some EHT APs check that 1701 * we don't set it. To avoid interoperability issues with old APs that 1702 * for some reason check it and want it to be set, set the bit for all 1703 * pre-EHT connections as we used to do. 1704 */ 1705 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1706 capab |= WLAN_CAPABILITY_ESS; 1707 1708 /* add the elements for the assoc (main) link */ 1709 link_capab = capab; 1710 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1711 ext_capa, 1712 assoc_data->ie, 1713 assoc_data->ie_len, 1714 assoc_data->assoc_link_id, link, 1715 present_elems); 1716 put_unaligned_le16(link_capab, capab_pos); 1717 1718 /* if present, add any custom non-vendor IEs */ 1719 if (assoc_data->ie_len) { 1720 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1721 assoc_data->ie_len, 1722 offset); 1723 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1724 offset = noffset; 1725 } 1726 1727 if (assoc_data->wmm) { 1728 if (assoc_data->uapsd) { 1729 qos_info = ifmgd->uapsd_queues; 1730 qos_info |= (ifmgd->uapsd_max_sp_len << 1731 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1732 } else { 1733 qos_info = 0; 1734 } 1735 1736 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1737 } 1738 1739 /* add any remaining custom (i.e. vendor specific here) IEs */ 1740 if (assoc_data->ie_len) { 1741 noffset = assoc_data->ie_len; 1742 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1743 } 1744 1745 if (assoc_data->fils_kek_len) { 1746 ret = fils_encrypt_assoc_req(skb, assoc_data); 1747 if (ret < 0) { 1748 dev_kfree_skb(skb); 1749 return ret; 1750 } 1751 } 1752 1753 pos = skb_tail_pointer(skb); 1754 kfree(ifmgd->assoc_req_ies); 1755 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1756 if (!ifmgd->assoc_req_ies) { 1757 dev_kfree_skb(skb); 1758 return -ENOMEM; 1759 } 1760 1761 ifmgd->assoc_req_ies_len = pos - ie_start; 1762 1763 info.link_id = assoc_data->assoc_link_id; 1764 drv_mgd_prepare_tx(local, sdata, &info); 1765 1766 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1767 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1768 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1769 IEEE80211_TX_INTFL_MLME_CONN_TX; 1770 ieee80211_tx_skb(sdata, skb); 1771 1772 return 0; 1773 } 1774 1775 void ieee80211_send_pspoll(struct ieee80211_local *local, 1776 struct ieee80211_sub_if_data *sdata) 1777 { 1778 struct ieee80211_pspoll *pspoll; 1779 struct sk_buff *skb; 1780 1781 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1782 if (!skb) 1783 return; 1784 1785 pspoll = (struct ieee80211_pspoll *) skb->data; 1786 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1787 1788 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1789 ieee80211_tx_skb(sdata, skb); 1790 } 1791 1792 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1793 struct ieee80211_sub_if_data *sdata, 1794 bool powersave) 1795 { 1796 struct sk_buff *skb; 1797 struct ieee80211_hdr_3addr *nullfunc; 1798 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1799 1800 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1801 !ieee80211_hw_check(&local->hw, 1802 DOESNT_SUPPORT_QOS_NDP)); 1803 if (!skb) 1804 return; 1805 1806 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1807 if (powersave) 1808 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1809 1810 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1811 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1812 1813 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1814 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1815 1816 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1817 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1818 1819 ieee80211_tx_skb(sdata, skb); 1820 } 1821 1822 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1823 struct ieee80211_sub_if_data *sdata) 1824 { 1825 struct sk_buff *skb; 1826 struct ieee80211_hdr *nullfunc; 1827 __le16 fc; 1828 1829 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1830 return; 1831 1832 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1833 if (!skb) 1834 return; 1835 1836 skb_reserve(skb, local->hw.extra_tx_headroom); 1837 1838 nullfunc = skb_put_zero(skb, 30); 1839 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1840 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1841 nullfunc->frame_control = fc; 1842 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1843 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1844 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1845 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1846 1847 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1848 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1849 ieee80211_tx_skb(sdata, skb); 1850 } 1851 1852 /* spectrum management related things */ 1853 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1854 struct wiphy_work *work) 1855 { 1856 struct ieee80211_link_data *link = 1857 container_of(work, struct ieee80211_link_data, 1858 u.mgd.chswitch_work.work); 1859 struct ieee80211_sub_if_data *sdata = link->sdata; 1860 struct ieee80211_local *local = sdata->local; 1861 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1862 int ret; 1863 1864 if (!ieee80211_sdata_running(sdata)) 1865 return; 1866 1867 lockdep_assert_wiphy(local->hw.wiphy); 1868 1869 if (!ifmgd->associated) 1870 return; 1871 1872 if (!link->conf->csa_active) 1873 return; 1874 1875 /* 1876 * using reservation isn't immediate as it may be deferred until later 1877 * with multi-vif. once reservation is complete it will re-schedule the 1878 * work with no reserved_chanctx so verify chandef to check if it 1879 * completed successfully 1880 */ 1881 1882 if (link->reserved_chanctx) { 1883 /* 1884 * with multi-vif csa driver may call ieee80211_csa_finish() 1885 * many times while waiting for other interfaces to use their 1886 * reservations 1887 */ 1888 if (link->reserved_ready) 1889 return; 1890 1891 ret = ieee80211_link_use_reserved_context(link); 1892 if (ret) { 1893 sdata_info(sdata, 1894 "failed to use reserved channel context, disconnecting (err=%d)\n", 1895 ret); 1896 wiphy_work_queue(sdata->local->hw.wiphy, 1897 &ifmgd->csa_connection_drop_work); 1898 } 1899 return; 1900 } 1901 1902 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 1903 &link->csa_chanreq)) { 1904 sdata_info(sdata, 1905 "failed to finalize channel switch, disconnecting\n"); 1906 wiphy_work_queue(sdata->local->hw.wiphy, 1907 &ifmgd->csa_connection_drop_work); 1908 return; 1909 } 1910 1911 link->u.mgd.csa_waiting_bcn = true; 1912 1913 ieee80211_sta_reset_beacon_monitor(sdata); 1914 ieee80211_sta_reset_conn_monitor(sdata); 1915 } 1916 1917 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1918 { 1919 struct ieee80211_sub_if_data *sdata = link->sdata; 1920 struct ieee80211_local *local = sdata->local; 1921 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1922 int ret; 1923 1924 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1925 1926 WARN_ON(!link->conf->csa_active); 1927 1928 if (link->csa_block_tx) { 1929 ieee80211_wake_vif_queues(local, sdata, 1930 IEEE80211_QUEUE_STOP_REASON_CSA); 1931 link->csa_block_tx = false; 1932 } 1933 1934 link->conf->csa_active = false; 1935 link->u.mgd.csa_waiting_bcn = false; 1936 /* 1937 * If the CSA IE is still present on the beacon after the switch, 1938 * we need to consider it as a new CSA (possibly to self). 1939 */ 1940 link->u.mgd.beacon_crc_valid = false; 1941 1942 ret = drv_post_channel_switch(link); 1943 if (ret) { 1944 sdata_info(sdata, 1945 "driver post channel switch failed, disconnecting\n"); 1946 wiphy_work_queue(sdata->local->hw.wiphy, 1947 &ifmgd->csa_connection_drop_work); 1948 return; 1949 } 1950 1951 cfg80211_ch_switch_notify(sdata->dev, &link->reserved.oper, 1952 link->link_id); 1953 } 1954 1955 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 1956 unsigned int link_id) 1957 { 1958 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1959 1960 trace_api_chswitch_done(sdata, success, link_id); 1961 1962 rcu_read_lock(); 1963 1964 if (!success) { 1965 sdata_info(sdata, 1966 "driver channel switch failed, disconnecting\n"); 1967 wiphy_work_queue(sdata->local->hw.wiphy, 1968 &sdata->u.mgd.csa_connection_drop_work); 1969 } else { 1970 struct ieee80211_link_data *link = 1971 rcu_dereference(sdata->link[link_id]); 1972 1973 if (WARN_ON(!link)) { 1974 rcu_read_unlock(); 1975 return; 1976 } 1977 1978 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1979 &link->u.mgd.chswitch_work, 0); 1980 } 1981 1982 rcu_read_unlock(); 1983 } 1984 EXPORT_SYMBOL(ieee80211_chswitch_done); 1985 1986 static void 1987 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1988 { 1989 struct ieee80211_sub_if_data *sdata = link->sdata; 1990 struct ieee80211_local *local = sdata->local; 1991 1992 lockdep_assert_wiphy(local->hw.wiphy); 1993 1994 if (!local->ops->abort_channel_switch) 1995 return; 1996 1997 ieee80211_link_unreserve_chanctx(link); 1998 1999 if (link->csa_block_tx) 2000 ieee80211_wake_vif_queues(local, sdata, 2001 IEEE80211_QUEUE_STOP_REASON_CSA); 2002 2003 link->csa_block_tx = false; 2004 link->conf->csa_active = false; 2005 2006 drv_abort_channel_switch(sdata); 2007 } 2008 2009 static void 2010 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2011 u64 timestamp, u32 device_timestamp, 2012 struct ieee802_11_elems *elems, 2013 bool beacon) 2014 { 2015 struct ieee80211_sub_if_data *sdata = link->sdata; 2016 struct ieee80211_local *local = sdata->local; 2017 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2018 struct cfg80211_bss *cbss = link->conf->bss; 2019 struct ieee80211_chanctx_conf *conf; 2020 struct ieee80211_chanctx *chanctx; 2021 enum nl80211_band current_band; 2022 struct ieee80211_csa_ie csa_ie; 2023 struct ieee80211_channel_switch ch_switch; 2024 struct ieee80211_bss *bss; 2025 unsigned long timeout; 2026 int res; 2027 2028 lockdep_assert_wiphy(local->hw.wiphy); 2029 2030 if (!cbss) 2031 return; 2032 2033 current_band = cbss->channel->band; 2034 bss = (void *)cbss->priv; 2035 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 2036 bss->vht_cap_info, 2037 &link->u.mgd.conn, 2038 link->u.mgd.bssid, &csa_ie); 2039 2040 if (!res) { 2041 ch_switch.timestamp = timestamp; 2042 ch_switch.device_timestamp = device_timestamp; 2043 ch_switch.block_tx = csa_ie.mode; 2044 ch_switch.chandef = csa_ie.chanreq.oper; 2045 ch_switch.count = csa_ie.count; 2046 ch_switch.delay = csa_ie.max_switch_time; 2047 } 2048 2049 if (res < 0) 2050 goto drop_connection; 2051 2052 if (beacon && link->conf->csa_active && 2053 !link->u.mgd.csa_waiting_bcn) { 2054 if (res) 2055 ieee80211_sta_abort_chanswitch(link); 2056 else 2057 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2058 return; 2059 } else if (link->conf->csa_active || res) { 2060 /* disregard subsequent announcements if already processing */ 2061 return; 2062 } 2063 2064 if (link->conf->chanreq.oper.chan->band != 2065 csa_ie.chanreq.oper.chan->band) { 2066 sdata_info(sdata, 2067 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2068 link->u.mgd.bssid, 2069 csa_ie.chanreq.oper.chan->center_freq, 2070 csa_ie.chanreq.oper.width, 2071 csa_ie.chanreq.oper.center_freq1, 2072 csa_ie.chanreq.oper.center_freq2); 2073 goto drop_connection; 2074 } 2075 2076 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2077 IEEE80211_CHAN_DISABLED)) { 2078 sdata_info(sdata, 2079 "AP %pM switches to unsupported channel " 2080 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 2081 "disconnecting\n", 2082 link->u.mgd.bssid, 2083 csa_ie.chanreq.oper.chan->center_freq, 2084 csa_ie.chanreq.oper.chan->freq_offset, 2085 csa_ie.chanreq.oper.width, 2086 csa_ie.chanreq.oper.center_freq1, 2087 csa_ie.chanreq.oper.freq1_offset, 2088 csa_ie.chanreq.oper.center_freq2); 2089 goto drop_connection; 2090 } 2091 2092 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2093 &link->conf->chanreq.oper) && 2094 (!csa_ie.mode || !beacon)) { 2095 if (link->u.mgd.csa_ignored_same_chan) 2096 return; 2097 sdata_info(sdata, 2098 "AP %pM tries to chanswitch to same channel, ignore\n", 2099 link->u.mgd.bssid); 2100 link->u.mgd.csa_ignored_same_chan = true; 2101 return; 2102 } 2103 2104 /* 2105 * Drop all TDLS peers - either we disconnect or move to a different 2106 * channel from this point on. There's no telling what our peer will do. 2107 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2108 * have an incompatible wider chandef. 2109 */ 2110 ieee80211_teardown_tdls_peers(sdata); 2111 2112 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2113 lockdep_is_held(&local->hw.wiphy->mtx)); 2114 if (!conf) { 2115 sdata_info(sdata, 2116 "no channel context assigned to vif?, disconnecting\n"); 2117 goto drop_connection; 2118 } 2119 2120 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2121 2122 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2123 sdata_info(sdata, 2124 "driver doesn't support chan-switch with channel contexts\n"); 2125 goto drop_connection; 2126 } 2127 2128 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2129 sdata_info(sdata, 2130 "preparing for channel switch failed, disconnecting\n"); 2131 goto drop_connection; 2132 } 2133 2134 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chanreq, 2135 chanctx->mode, false); 2136 if (res) { 2137 sdata_info(sdata, 2138 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2139 res); 2140 goto drop_connection; 2141 } 2142 2143 link->conf->csa_active = true; 2144 link->csa_chanreq = csa_ie.chanreq; 2145 link->csa_block_tx = csa_ie.mode; 2146 link->u.mgd.csa_ignored_same_chan = false; 2147 link->u.mgd.beacon_crc_valid = false; 2148 2149 if (link->csa_block_tx) 2150 ieee80211_stop_vif_queues(local, sdata, 2151 IEEE80211_QUEUE_STOP_REASON_CSA); 2152 2153 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2154 link->link_id, csa_ie.count, 2155 csa_ie.mode); 2156 2157 if (local->ops->channel_switch) { 2158 /* use driver's channel switch callback */ 2159 drv_channel_switch(local, sdata, &ch_switch); 2160 return; 2161 } 2162 2163 /* channel switch handled in software */ 2164 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2165 cbss->beacon_interval); 2166 wiphy_delayed_work_queue(local->hw.wiphy, 2167 &link->u.mgd.chswitch_work, 2168 timeout); 2169 return; 2170 drop_connection: 2171 /* 2172 * This is just so that the disconnect flow will know that 2173 * we were trying to switch channel and failed. In case the 2174 * mode is 1 (we are not allowed to Tx), we will know not to 2175 * send a deauthentication frame. Those two fields will be 2176 * reset when the disconnection worker runs. 2177 */ 2178 link->conf->csa_active = true; 2179 link->csa_block_tx = csa_ie.mode; 2180 2181 wiphy_work_queue(sdata->local->hw.wiphy, 2182 &ifmgd->csa_connection_drop_work); 2183 } 2184 2185 static bool 2186 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2187 struct ieee80211_channel *channel, 2188 const u8 *country_ie, u8 country_ie_len, 2189 const u8 *pwr_constr_elem, 2190 int *chan_pwr, int *pwr_reduction) 2191 { 2192 struct ieee80211_country_ie_triplet *triplet; 2193 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2194 int i, chan_increment; 2195 bool have_chan_pwr = false; 2196 2197 /* Invalid IE */ 2198 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2199 return false; 2200 2201 triplet = (void *)(country_ie + 3); 2202 country_ie_len -= 3; 2203 2204 switch (channel->band) { 2205 default: 2206 WARN_ON_ONCE(1); 2207 fallthrough; 2208 case NL80211_BAND_2GHZ: 2209 case NL80211_BAND_60GHZ: 2210 case NL80211_BAND_LC: 2211 chan_increment = 1; 2212 break; 2213 case NL80211_BAND_5GHZ: 2214 chan_increment = 4; 2215 break; 2216 case NL80211_BAND_6GHZ: 2217 /* 2218 * In the 6 GHz band, the "maximum transmit power level" 2219 * field in the triplets is reserved, and thus will be 2220 * zero and we shouldn't use it to control TX power. 2221 * The actual TX power will be given in the transmit 2222 * power envelope element instead. 2223 */ 2224 return false; 2225 } 2226 2227 /* find channel */ 2228 while (country_ie_len >= 3) { 2229 u8 first_channel = triplet->chans.first_channel; 2230 2231 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2232 goto next; 2233 2234 for (i = 0; i < triplet->chans.num_channels; i++) { 2235 if (first_channel + i * chan_increment == chan) { 2236 have_chan_pwr = true; 2237 *chan_pwr = triplet->chans.max_power; 2238 break; 2239 } 2240 } 2241 if (have_chan_pwr) 2242 break; 2243 2244 next: 2245 triplet++; 2246 country_ie_len -= 3; 2247 } 2248 2249 if (have_chan_pwr && pwr_constr_elem) 2250 *pwr_reduction = *pwr_constr_elem; 2251 else 2252 *pwr_reduction = 0; 2253 2254 return have_chan_pwr; 2255 } 2256 2257 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2258 struct ieee80211_channel *channel, 2259 const u8 *cisco_dtpc_ie, 2260 int *pwr_level) 2261 { 2262 /* From practical testing, the first data byte of the DTPC element 2263 * seems to contain the requested dBm level, and the CLI on Cisco 2264 * APs clearly state the range is -127 to 127 dBm, which indicates 2265 * a signed byte, although it seemingly never actually goes negative. 2266 * The other byte seems to always be zero. 2267 */ 2268 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2269 } 2270 2271 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2272 struct ieee80211_channel *channel, 2273 struct ieee80211_mgmt *mgmt, 2274 const u8 *country_ie, u8 country_ie_len, 2275 const u8 *pwr_constr_ie, 2276 const u8 *cisco_dtpc_ie) 2277 { 2278 struct ieee80211_sub_if_data *sdata = link->sdata; 2279 bool has_80211h_pwr = false, has_cisco_pwr = false; 2280 int chan_pwr = 0, pwr_reduction_80211h = 0; 2281 int pwr_level_cisco, pwr_level_80211h; 2282 int new_ap_level; 2283 __le16 capab = mgmt->u.probe_resp.capab_info; 2284 2285 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2286 return 0; /* TODO */ 2287 2288 if (country_ie && 2289 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2290 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2291 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2292 sdata, channel, country_ie, country_ie_len, 2293 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2294 pwr_level_80211h = 2295 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2296 } 2297 2298 if (cisco_dtpc_ie) { 2299 ieee80211_find_cisco_dtpc( 2300 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2301 has_cisco_pwr = true; 2302 } 2303 2304 if (!has_80211h_pwr && !has_cisco_pwr) 2305 return 0; 2306 2307 /* If we have both 802.11h and Cisco DTPC, apply both limits 2308 * by picking the smallest of the two power levels advertised. 2309 */ 2310 if (has_80211h_pwr && 2311 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2312 new_ap_level = pwr_level_80211h; 2313 2314 if (link->ap_power_level == new_ap_level) 2315 return 0; 2316 2317 sdata_dbg(sdata, 2318 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2319 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2320 link->u.mgd.bssid); 2321 } else { /* has_cisco_pwr is always true here. */ 2322 new_ap_level = pwr_level_cisco; 2323 2324 if (link->ap_power_level == new_ap_level) 2325 return 0; 2326 2327 sdata_dbg(sdata, 2328 "Limiting TX power to %d dBm as advertised by %pM\n", 2329 pwr_level_cisco, link->u.mgd.bssid); 2330 } 2331 2332 link->ap_power_level = new_ap_level; 2333 if (__ieee80211_recalc_txpower(sdata)) 2334 return BSS_CHANGED_TXPOWER; 2335 return 0; 2336 } 2337 2338 /* powersave */ 2339 static void ieee80211_enable_ps(struct ieee80211_local *local, 2340 struct ieee80211_sub_if_data *sdata) 2341 { 2342 struct ieee80211_conf *conf = &local->hw.conf; 2343 2344 /* 2345 * If we are scanning right now then the parameters will 2346 * take effect when scan finishes. 2347 */ 2348 if (local->scanning) 2349 return; 2350 2351 if (conf->dynamic_ps_timeout > 0 && 2352 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2353 mod_timer(&local->dynamic_ps_timer, jiffies + 2354 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2355 } else { 2356 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2357 ieee80211_send_nullfunc(local, sdata, true); 2358 2359 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2360 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2361 return; 2362 2363 conf->flags |= IEEE80211_CONF_PS; 2364 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2365 } 2366 } 2367 2368 static void ieee80211_change_ps(struct ieee80211_local *local) 2369 { 2370 struct ieee80211_conf *conf = &local->hw.conf; 2371 2372 if (local->ps_sdata) { 2373 ieee80211_enable_ps(local, local->ps_sdata); 2374 } else if (conf->flags & IEEE80211_CONF_PS) { 2375 conf->flags &= ~IEEE80211_CONF_PS; 2376 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2377 del_timer_sync(&local->dynamic_ps_timer); 2378 wiphy_work_cancel(local->hw.wiphy, 2379 &local->dynamic_ps_enable_work); 2380 } 2381 } 2382 2383 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2384 { 2385 struct ieee80211_local *local = sdata->local; 2386 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2387 struct sta_info *sta = NULL; 2388 bool authorized = false; 2389 2390 if (!mgd->powersave) 2391 return false; 2392 2393 if (mgd->broken_ap) 2394 return false; 2395 2396 if (!mgd->associated) 2397 return false; 2398 2399 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2400 return false; 2401 2402 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2403 !sdata->deflink.u.mgd.have_beacon) 2404 return false; 2405 2406 rcu_read_lock(); 2407 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2408 if (sta) 2409 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2410 rcu_read_unlock(); 2411 2412 return authorized; 2413 } 2414 2415 /* need to hold RTNL or interface lock */ 2416 void ieee80211_recalc_ps(struct ieee80211_local *local) 2417 { 2418 struct ieee80211_sub_if_data *sdata, *found = NULL; 2419 int count = 0; 2420 int timeout; 2421 2422 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2423 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2424 local->ps_sdata = NULL; 2425 return; 2426 } 2427 2428 list_for_each_entry(sdata, &local->interfaces, list) { 2429 if (!ieee80211_sdata_running(sdata)) 2430 continue; 2431 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2432 /* If an AP vif is found, then disable PS 2433 * by setting the count to zero thereby setting 2434 * ps_sdata to NULL. 2435 */ 2436 count = 0; 2437 break; 2438 } 2439 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2440 continue; 2441 found = sdata; 2442 count++; 2443 } 2444 2445 if (count == 1 && ieee80211_powersave_allowed(found)) { 2446 u8 dtimper = found->deflink.u.mgd.dtim_period; 2447 2448 timeout = local->dynamic_ps_forced_timeout; 2449 if (timeout < 0) 2450 timeout = 100; 2451 local->hw.conf.dynamic_ps_timeout = timeout; 2452 2453 /* If the TIM IE is invalid, pretend the value is 1 */ 2454 if (!dtimper) 2455 dtimper = 1; 2456 2457 local->hw.conf.ps_dtim_period = dtimper; 2458 local->ps_sdata = found; 2459 } else { 2460 local->ps_sdata = NULL; 2461 } 2462 2463 ieee80211_change_ps(local); 2464 } 2465 2466 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2467 { 2468 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2469 2470 if (sdata->vif.cfg.ps != ps_allowed) { 2471 sdata->vif.cfg.ps = ps_allowed; 2472 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2473 } 2474 } 2475 2476 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2477 struct wiphy_work *work) 2478 { 2479 struct ieee80211_local *local = 2480 container_of(work, struct ieee80211_local, 2481 dynamic_ps_disable_work); 2482 2483 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2484 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2485 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2486 } 2487 2488 ieee80211_wake_queues_by_reason(&local->hw, 2489 IEEE80211_MAX_QUEUE_MAP, 2490 IEEE80211_QUEUE_STOP_REASON_PS, 2491 false); 2492 } 2493 2494 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2495 struct wiphy_work *work) 2496 { 2497 struct ieee80211_local *local = 2498 container_of(work, struct ieee80211_local, 2499 dynamic_ps_enable_work); 2500 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2501 struct ieee80211_if_managed *ifmgd; 2502 unsigned long flags; 2503 int q; 2504 2505 /* can only happen when PS was just disabled anyway */ 2506 if (!sdata) 2507 return; 2508 2509 ifmgd = &sdata->u.mgd; 2510 2511 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2512 return; 2513 2514 if (local->hw.conf.dynamic_ps_timeout > 0) { 2515 /* don't enter PS if TX frames are pending */ 2516 if (drv_tx_frames_pending(local)) { 2517 mod_timer(&local->dynamic_ps_timer, jiffies + 2518 msecs_to_jiffies( 2519 local->hw.conf.dynamic_ps_timeout)); 2520 return; 2521 } 2522 2523 /* 2524 * transmission can be stopped by others which leads to 2525 * dynamic_ps_timer expiry. Postpone the ps timer if it 2526 * is not the actual idle state. 2527 */ 2528 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2529 for (q = 0; q < local->hw.queues; q++) { 2530 if (local->queue_stop_reasons[q]) { 2531 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2532 flags); 2533 mod_timer(&local->dynamic_ps_timer, jiffies + 2534 msecs_to_jiffies( 2535 local->hw.conf.dynamic_ps_timeout)); 2536 return; 2537 } 2538 } 2539 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2540 } 2541 2542 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2543 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2544 if (drv_tx_frames_pending(local)) { 2545 mod_timer(&local->dynamic_ps_timer, jiffies + 2546 msecs_to_jiffies( 2547 local->hw.conf.dynamic_ps_timeout)); 2548 } else { 2549 ieee80211_send_nullfunc(local, sdata, true); 2550 /* Flush to get the tx status of nullfunc frame */ 2551 ieee80211_flush_queues(local, sdata, false); 2552 } 2553 } 2554 2555 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2556 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2557 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2558 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2559 local->hw.conf.flags |= IEEE80211_CONF_PS; 2560 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2561 } 2562 } 2563 2564 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2565 { 2566 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2567 2568 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 2569 } 2570 2571 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 2572 { 2573 struct ieee80211_link_data *link = 2574 container_of(work, struct ieee80211_link_data, 2575 dfs_cac_timer_work.work); 2576 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 2577 struct ieee80211_sub_if_data *sdata = link->sdata; 2578 2579 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2580 2581 if (sdata->wdev.cac_started) { 2582 ieee80211_link_release_channel(link); 2583 cfg80211_cac_event(sdata->dev, &chandef, 2584 NL80211_RADAR_CAC_FINISHED, 2585 GFP_KERNEL); 2586 } 2587 } 2588 2589 static bool 2590 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2591 { 2592 struct ieee80211_local *local = sdata->local; 2593 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2594 bool ret = false; 2595 int ac; 2596 2597 if (local->hw.queues < IEEE80211_NUM_ACS) 2598 return false; 2599 2600 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2601 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2602 int non_acm_ac; 2603 unsigned long now = jiffies; 2604 2605 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2606 tx_tspec->admitted_time && 2607 time_after(now, tx_tspec->time_slice_start + HZ)) { 2608 tx_tspec->consumed_tx_time = 0; 2609 tx_tspec->time_slice_start = now; 2610 2611 if (tx_tspec->downgraded) 2612 tx_tspec->action = 2613 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2614 } 2615 2616 switch (tx_tspec->action) { 2617 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2618 /* take the original parameters */ 2619 if (drv_conf_tx(local, &sdata->deflink, ac, 2620 &sdata->deflink.tx_conf[ac])) 2621 link_err(&sdata->deflink, 2622 "failed to set TX queue parameters for queue %d\n", 2623 ac); 2624 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2625 tx_tspec->downgraded = false; 2626 ret = true; 2627 break; 2628 case TX_TSPEC_ACTION_DOWNGRADE: 2629 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2630 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2631 ret = true; 2632 break; 2633 } 2634 /* downgrade next lower non-ACM AC */ 2635 for (non_acm_ac = ac + 1; 2636 non_acm_ac < IEEE80211_NUM_ACS; 2637 non_acm_ac++) 2638 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2639 break; 2640 /* Usually the loop will result in using BK even if it 2641 * requires admission control, but such a configuration 2642 * makes no sense and we have to transmit somehow - the 2643 * AC selection does the same thing. 2644 * If we started out trying to downgrade from BK, then 2645 * the extra condition here might be needed. 2646 */ 2647 if (non_acm_ac >= IEEE80211_NUM_ACS) 2648 non_acm_ac = IEEE80211_AC_BK; 2649 if (drv_conf_tx(local, &sdata->deflink, ac, 2650 &sdata->deflink.tx_conf[non_acm_ac])) 2651 link_err(&sdata->deflink, 2652 "failed to set TX queue parameters for queue %d\n", 2653 ac); 2654 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2655 ret = true; 2656 wiphy_delayed_work_queue(local->hw.wiphy, 2657 &ifmgd->tx_tspec_wk, 2658 tx_tspec->time_slice_start + 2659 HZ - now + 1); 2660 break; 2661 case TX_TSPEC_ACTION_NONE: 2662 /* nothing now */ 2663 break; 2664 } 2665 } 2666 2667 return ret; 2668 } 2669 2670 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2671 { 2672 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2673 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2674 BSS_CHANGED_QOS); 2675 } 2676 2677 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 2678 struct wiphy_work *work) 2679 { 2680 struct ieee80211_sub_if_data *sdata; 2681 2682 sdata = container_of(work, struct ieee80211_sub_if_data, 2683 u.mgd.tx_tspec_wk.work); 2684 ieee80211_sta_handle_tspec_ac_params(sdata); 2685 } 2686 2687 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2688 { 2689 struct ieee80211_sub_if_data *sdata = link->sdata; 2690 struct ieee80211_local *local = sdata->local; 2691 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2692 struct ieee80211_tx_queue_params *params = link->tx_conf; 2693 u8 ac; 2694 2695 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2696 mlme_dbg(sdata, 2697 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2698 ac, params[ac].acm, 2699 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2700 params[ac].txop, params[ac].uapsd, 2701 ifmgd->tx_tspec[ac].downgraded); 2702 if (!ifmgd->tx_tspec[ac].downgraded && 2703 drv_conf_tx(local, link, ac, ¶ms[ac])) 2704 link_err(link, 2705 "failed to set TX queue parameters for AC %d\n", 2706 ac); 2707 } 2708 } 2709 2710 /* MLME */ 2711 static bool 2712 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2713 struct ieee80211_link_data *link, 2714 const u8 *wmm_param, size_t wmm_param_len, 2715 const struct ieee80211_mu_edca_param_set *mu_edca) 2716 { 2717 struct ieee80211_sub_if_data *sdata = link->sdata; 2718 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2720 size_t left; 2721 int count, mu_edca_count, ac; 2722 const u8 *pos; 2723 u8 uapsd_queues = 0; 2724 2725 if (!local->ops->conf_tx) 2726 return false; 2727 2728 if (local->hw.queues < IEEE80211_NUM_ACS) 2729 return false; 2730 2731 if (!wmm_param) 2732 return false; 2733 2734 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2735 return false; 2736 2737 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2738 uapsd_queues = ifmgd->uapsd_queues; 2739 2740 count = wmm_param[6] & 0x0f; 2741 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2742 * if mu_edca was preset before and now it disappeared tell 2743 * the driver about it. 2744 */ 2745 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2746 if (count == link->u.mgd.wmm_last_param_set && 2747 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2748 return false; 2749 link->u.mgd.wmm_last_param_set = count; 2750 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2751 2752 pos = wmm_param + 8; 2753 left = wmm_param_len - 8; 2754 2755 memset(¶ms, 0, sizeof(params)); 2756 2757 sdata->wmm_acm = 0; 2758 for (; left >= 4; left -= 4, pos += 4) { 2759 int aci = (pos[0] >> 5) & 0x03; 2760 int acm = (pos[0] >> 4) & 0x01; 2761 bool uapsd = false; 2762 2763 switch (aci) { 2764 case 1: /* AC_BK */ 2765 ac = IEEE80211_AC_BK; 2766 if (acm) 2767 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2768 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2769 uapsd = true; 2770 params[ac].mu_edca = !!mu_edca; 2771 if (mu_edca) 2772 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2773 break; 2774 case 2: /* AC_VI */ 2775 ac = IEEE80211_AC_VI; 2776 if (acm) 2777 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2778 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2779 uapsd = true; 2780 params[ac].mu_edca = !!mu_edca; 2781 if (mu_edca) 2782 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2783 break; 2784 case 3: /* AC_VO */ 2785 ac = IEEE80211_AC_VO; 2786 if (acm) 2787 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2788 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2789 uapsd = true; 2790 params[ac].mu_edca = !!mu_edca; 2791 if (mu_edca) 2792 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2793 break; 2794 case 0: /* AC_BE */ 2795 default: 2796 ac = IEEE80211_AC_BE; 2797 if (acm) 2798 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2799 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2800 uapsd = true; 2801 params[ac].mu_edca = !!mu_edca; 2802 if (mu_edca) 2803 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2804 break; 2805 } 2806 2807 params[ac].aifs = pos[0] & 0x0f; 2808 2809 if (params[ac].aifs < 2) { 2810 link_info(link, 2811 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2812 params[ac].aifs, aci); 2813 params[ac].aifs = 2; 2814 } 2815 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2816 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2817 params[ac].txop = get_unaligned_le16(pos + 2); 2818 params[ac].acm = acm; 2819 params[ac].uapsd = uapsd; 2820 2821 if (params[ac].cw_min == 0 || 2822 params[ac].cw_min > params[ac].cw_max) { 2823 link_info(link, 2824 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2825 params[ac].cw_min, params[ac].cw_max, aci); 2826 return false; 2827 } 2828 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2829 } 2830 2831 /* WMM specification requires all 4 ACIs. */ 2832 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2833 if (params[ac].cw_min == 0) { 2834 link_info(link, 2835 "AP has invalid WMM params (missing AC %d), using defaults\n", 2836 ac); 2837 return false; 2838 } 2839 } 2840 2841 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2842 link->tx_conf[ac] = params[ac]; 2843 2844 ieee80211_mgd_set_link_qos_params(link); 2845 2846 /* enable WMM or activate new settings */ 2847 link->conf->qos = true; 2848 return true; 2849 } 2850 2851 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2852 { 2853 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2854 2855 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2856 ieee80211_run_deferred_scan(sdata->local); 2857 } 2858 2859 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2860 { 2861 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2862 2863 __ieee80211_stop_poll(sdata); 2864 } 2865 2866 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2867 u16 capab, bool erp_valid, u8 erp) 2868 { 2869 struct ieee80211_bss_conf *bss_conf = link->conf; 2870 struct ieee80211_supported_band *sband; 2871 u64 changed = 0; 2872 bool use_protection; 2873 bool use_short_preamble; 2874 bool use_short_slot; 2875 2876 sband = ieee80211_get_link_sband(link); 2877 if (!sband) 2878 return changed; 2879 2880 if (erp_valid) { 2881 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2882 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2883 } else { 2884 use_protection = false; 2885 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2886 } 2887 2888 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2889 if (sband->band == NL80211_BAND_5GHZ || 2890 sband->band == NL80211_BAND_6GHZ) 2891 use_short_slot = true; 2892 2893 if (use_protection != bss_conf->use_cts_prot) { 2894 bss_conf->use_cts_prot = use_protection; 2895 changed |= BSS_CHANGED_ERP_CTS_PROT; 2896 } 2897 2898 if (use_short_preamble != bss_conf->use_short_preamble) { 2899 bss_conf->use_short_preamble = use_short_preamble; 2900 changed |= BSS_CHANGED_ERP_PREAMBLE; 2901 } 2902 2903 if (use_short_slot != bss_conf->use_short_slot) { 2904 bss_conf->use_short_slot = use_short_slot; 2905 changed |= BSS_CHANGED_ERP_SLOT; 2906 } 2907 2908 return changed; 2909 } 2910 2911 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2912 struct cfg80211_bss *cbss) 2913 { 2914 struct ieee80211_sub_if_data *sdata = link->sdata; 2915 struct ieee80211_bss_conf *bss_conf = link->conf; 2916 struct ieee80211_bss *bss = (void *)cbss->priv; 2917 u64 changed = BSS_CHANGED_QOS; 2918 2919 /* not really used in MLO */ 2920 sdata->u.mgd.beacon_timeout = 2921 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2922 bss_conf->beacon_int)); 2923 2924 changed |= ieee80211_handle_bss_capability(link, 2925 bss_conf->assoc_capability, 2926 bss->has_erp_value, 2927 bss->erp_value); 2928 2929 ieee80211_check_rate_mask(link); 2930 2931 link->conf->bss = cbss; 2932 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2933 2934 if (sdata->vif.p2p || 2935 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2936 const struct cfg80211_bss_ies *ies; 2937 2938 rcu_read_lock(); 2939 ies = rcu_dereference(cbss->ies); 2940 if (ies) { 2941 int ret; 2942 2943 ret = cfg80211_get_p2p_attr( 2944 ies->data, ies->len, 2945 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2946 (u8 *) &bss_conf->p2p_noa_attr, 2947 sizeof(bss_conf->p2p_noa_attr)); 2948 if (ret >= 2) { 2949 link->u.mgd.p2p_noa_index = 2950 bss_conf->p2p_noa_attr.index; 2951 changed |= BSS_CHANGED_P2P_PS; 2952 } 2953 } 2954 rcu_read_unlock(); 2955 } 2956 2957 if (link->u.mgd.have_beacon) { 2958 bss_conf->beacon_rate = bss->beacon_rate; 2959 changed |= BSS_CHANGED_BEACON_INFO; 2960 } else { 2961 bss_conf->beacon_rate = NULL; 2962 } 2963 2964 /* Tell the driver to monitor connection quality (if supported) */ 2965 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2966 bss_conf->cqm_rssi_thold) 2967 changed |= BSS_CHANGED_CQM; 2968 2969 return changed; 2970 } 2971 2972 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 2973 struct ieee80211_mgd_assoc_data *assoc_data, 2974 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 2975 { 2976 struct ieee80211_local *local = sdata->local; 2977 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 2978 u64 vif_changed = BSS_CHANGED_ASSOC; 2979 unsigned int link_id; 2980 2981 lockdep_assert_wiphy(local->hw.wiphy); 2982 2983 sdata->u.mgd.associated = true; 2984 2985 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 2986 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 2987 struct ieee80211_link_data *link; 2988 2989 if (!cbss || 2990 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 2991 continue; 2992 2993 if (ieee80211_vif_is_mld(&sdata->vif) && 2994 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 2995 continue; 2996 2997 link = sdata_dereference(sdata->link[link_id], sdata); 2998 if (WARN_ON(!link)) 2999 return; 3000 3001 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3002 } 3003 3004 /* just to be sure */ 3005 ieee80211_stop_poll(sdata); 3006 3007 ieee80211_led_assoc(local, 1); 3008 3009 vif_cfg->assoc = 1; 3010 3011 /* Enable ARP filtering */ 3012 if (vif_cfg->arp_addr_cnt) 3013 vif_changed |= BSS_CHANGED_ARP_FILTER; 3014 3015 if (ieee80211_vif_is_mld(&sdata->vif)) { 3016 for (link_id = 0; 3017 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3018 link_id++) { 3019 struct ieee80211_link_data *link; 3020 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3021 3022 if (!cbss || 3023 !(BIT(link_id) & 3024 ieee80211_vif_usable_links(&sdata->vif)) || 3025 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3026 continue; 3027 3028 link = sdata_dereference(sdata->link[link_id], sdata); 3029 if (WARN_ON(!link)) 3030 return; 3031 3032 ieee80211_link_info_change_notify(sdata, link, 3033 changed[link_id]); 3034 3035 ieee80211_recalc_smps(sdata, link); 3036 } 3037 3038 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3039 } else { 3040 ieee80211_bss_info_change_notify(sdata, 3041 vif_changed | changed[0]); 3042 } 3043 3044 ieee80211_recalc_ps(local); 3045 3046 /* leave this here to not change ordering in non-MLO cases */ 3047 if (!ieee80211_vif_is_mld(&sdata->vif)) 3048 ieee80211_recalc_smps(sdata, &sdata->deflink); 3049 ieee80211_recalc_ps_vif(sdata); 3050 3051 netif_carrier_on(sdata->dev); 3052 } 3053 3054 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3055 u16 stype, u16 reason, bool tx, 3056 u8 *frame_buf) 3057 { 3058 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3059 struct ieee80211_local *local = sdata->local; 3060 unsigned int link_id; 3061 u64 changed = 0; 3062 struct ieee80211_prep_tx_info info = { 3063 .subtype = stype, 3064 }; 3065 3066 lockdep_assert_wiphy(local->hw.wiphy); 3067 3068 if (WARN_ON_ONCE(tx && !frame_buf)) 3069 return; 3070 3071 if (WARN_ON(!ifmgd->associated)) 3072 return; 3073 3074 ieee80211_stop_poll(sdata); 3075 3076 ifmgd->associated = false; 3077 3078 /* other links will be destroyed */ 3079 sdata->deflink.conf->bss = NULL; 3080 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3081 3082 netif_carrier_off(sdata->dev); 3083 3084 /* 3085 * if we want to get out of ps before disassoc (why?) we have 3086 * to do it before sending disassoc, as otherwise the null-packet 3087 * won't be valid. 3088 */ 3089 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3090 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3091 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3092 } 3093 local->ps_sdata = NULL; 3094 3095 /* disable per-vif ps */ 3096 ieee80211_recalc_ps_vif(sdata); 3097 3098 /* make sure ongoing transmission finishes */ 3099 synchronize_net(); 3100 3101 /* 3102 * drop any frame before deauth/disassoc, this can be data or 3103 * management frame. Since we are disconnecting, we should not 3104 * insist sending these frames which can take time and delay 3105 * the disconnection and possible the roaming. 3106 */ 3107 if (tx) 3108 ieee80211_flush_queues(local, sdata, true); 3109 3110 /* deauthenticate/disassociate now */ 3111 if (tx || frame_buf) { 3112 /* 3113 * In multi channel scenarios guarantee that the virtual 3114 * interface is granted immediate airtime to transmit the 3115 * deauthentication frame by calling mgd_prepare_tx, if the 3116 * driver requested so. 3117 */ 3118 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 3119 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 3120 link_id++) { 3121 struct ieee80211_link_data *link; 3122 3123 link = sdata_dereference(sdata->link[link_id], 3124 sdata); 3125 if (!link) 3126 continue; 3127 if (link->u.mgd.have_beacon) 3128 break; 3129 } 3130 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 3131 info.link_id = ffs(sdata->vif.active_links) - 1; 3132 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3133 } 3134 } 3135 3136 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3137 sdata->vif.cfg.ap_addr, stype, 3138 reason, tx, frame_buf); 3139 } 3140 3141 /* flush out frame - make sure the deauth was actually sent */ 3142 if (tx) 3143 ieee80211_flush_queues(local, sdata, false); 3144 3145 drv_mgd_complete_tx(sdata->local, sdata, &info); 3146 3147 /* clear AP addr only after building the needed mgmt frames */ 3148 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3149 eth_zero_addr(sdata->vif.cfg.ap_addr); 3150 3151 sdata->vif.cfg.ssid_len = 0; 3152 3153 /* remove AP and TDLS peers */ 3154 sta_info_flush(sdata, -1); 3155 3156 /* finally reset all BSS / config parameters */ 3157 if (!ieee80211_vif_is_mld(&sdata->vif)) 3158 changed |= ieee80211_reset_erp_info(sdata); 3159 3160 ieee80211_led_assoc(local, 0); 3161 changed |= BSS_CHANGED_ASSOC; 3162 sdata->vif.cfg.assoc = false; 3163 3164 sdata->deflink.u.mgd.p2p_noa_index = -1; 3165 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3166 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3167 3168 /* on the next assoc, re-program HT/VHT parameters */ 3169 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3170 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3171 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3172 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3173 3174 /* 3175 * reset MU-MIMO ownership and group data in default link, 3176 * if used, other links are destroyed 3177 */ 3178 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3179 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3180 memset(sdata->vif.bss_conf.mu_group.position, 0, 3181 sizeof(sdata->vif.bss_conf.mu_group.position)); 3182 if (!ieee80211_vif_is_mld(&sdata->vif)) 3183 changed |= BSS_CHANGED_MU_GROUPS; 3184 sdata->vif.bss_conf.mu_mimo_owner = false; 3185 3186 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3187 3188 del_timer_sync(&local->dynamic_ps_timer); 3189 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3190 3191 /* Disable ARP filtering */ 3192 if (sdata->vif.cfg.arp_addr_cnt) 3193 changed |= BSS_CHANGED_ARP_FILTER; 3194 3195 sdata->vif.bss_conf.qos = false; 3196 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3197 changed |= BSS_CHANGED_QOS; 3198 /* The BSSID (not really interesting) and HT changed */ 3199 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3200 ieee80211_bss_info_change_notify(sdata, changed); 3201 } else { 3202 ieee80211_vif_cfg_change_notify(sdata, changed); 3203 } 3204 3205 /* disassociated - set to defaults now */ 3206 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3207 3208 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3209 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3210 del_timer_sync(&sdata->u.mgd.timer); 3211 3212 sdata->vif.bss_conf.dtim_period = 0; 3213 sdata->vif.bss_conf.beacon_rate = NULL; 3214 3215 sdata->deflink.u.mgd.have_beacon = false; 3216 sdata->deflink.u.mgd.tracking_signal_avg = false; 3217 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3218 3219 ifmgd->flags = 0; 3220 3221 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3222 struct ieee80211_link_data *link; 3223 3224 link = sdata_dereference(sdata->link[link_id], sdata); 3225 if (!link) 3226 continue; 3227 ieee80211_link_release_channel(link); 3228 } 3229 3230 sdata->vif.bss_conf.csa_active = false; 3231 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3232 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3233 if (sdata->deflink.csa_block_tx) { 3234 ieee80211_wake_vif_queues(local, sdata, 3235 IEEE80211_QUEUE_STOP_REASON_CSA); 3236 sdata->deflink.csa_block_tx = false; 3237 } 3238 3239 /* existing TX TSPEC sessions no longer exist */ 3240 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3241 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3242 3243 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3244 sdata->vif.bss_conf.pwr_reduction = 0; 3245 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3246 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3247 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3248 3249 sdata->vif.cfg.eml_cap = 0; 3250 sdata->vif.cfg.eml_med_sync_delay = 0; 3251 sdata->vif.cfg.mld_capa_op = 0; 3252 3253 memset(&sdata->u.mgd.ttlm_info, 0, 3254 sizeof(sdata->u.mgd.ttlm_info)); 3255 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3256 3257 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3258 &ifmgd->neg_ttlm_timeout_work); 3259 ieee80211_vif_set_links(sdata, 0, 0); 3260 3261 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3262 } 3263 3264 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3265 { 3266 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3267 struct ieee80211_local *local = sdata->local; 3268 3269 lockdep_assert_wiphy(local->hw.wiphy); 3270 3271 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3272 return; 3273 3274 __ieee80211_stop_poll(sdata); 3275 3276 ieee80211_recalc_ps(local); 3277 3278 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3279 return; 3280 3281 /* 3282 * We've received a probe response, but are not sure whether 3283 * we have or will be receiving any beacons or data, so let's 3284 * schedule the timers again, just in case. 3285 */ 3286 ieee80211_sta_reset_beacon_monitor(sdata); 3287 3288 mod_timer(&ifmgd->conn_mon_timer, 3289 round_jiffies_up(jiffies + 3290 IEEE80211_CONNECTION_IDLE_TIME)); 3291 } 3292 3293 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3294 struct ieee80211_hdr *hdr, 3295 u16 tx_time) 3296 { 3297 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3298 u16 tid; 3299 int ac; 3300 struct ieee80211_sta_tx_tspec *tx_tspec; 3301 unsigned long now = jiffies; 3302 3303 if (!ieee80211_is_data_qos(hdr->frame_control)) 3304 return; 3305 3306 tid = ieee80211_get_tid(hdr); 3307 ac = ieee80211_ac_from_tid(tid); 3308 tx_tspec = &ifmgd->tx_tspec[ac]; 3309 3310 if (likely(!tx_tspec->admitted_time)) 3311 return; 3312 3313 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3314 tx_tspec->consumed_tx_time = 0; 3315 tx_tspec->time_slice_start = now; 3316 3317 if (tx_tspec->downgraded) { 3318 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3319 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3320 &ifmgd->tx_tspec_wk, 0); 3321 } 3322 } 3323 3324 if (tx_tspec->downgraded) 3325 return; 3326 3327 tx_tspec->consumed_tx_time += tx_time; 3328 3329 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3330 tx_tspec->downgraded = true; 3331 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3332 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3333 &ifmgd->tx_tspec_wk, 0); 3334 } 3335 } 3336 3337 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3338 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3339 { 3340 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3341 3342 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3343 !sdata->u.mgd.probe_send_count) 3344 return; 3345 3346 if (ack) 3347 sdata->u.mgd.probe_send_count = 0; 3348 else 3349 sdata->u.mgd.nullfunc_failed = true; 3350 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3351 } 3352 3353 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3354 const u8 *src, const u8 *dst, 3355 const u8 *ssid, size_t ssid_len, 3356 struct ieee80211_channel *channel) 3357 { 3358 struct sk_buff *skb; 3359 3360 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3361 ssid, ssid_len, NULL, 0, 3362 IEEE80211_PROBE_FLAG_DIRECTED); 3363 if (skb) 3364 ieee80211_tx_skb(sdata, skb); 3365 } 3366 3367 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3368 { 3369 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3370 u8 *dst = sdata->vif.cfg.ap_addr; 3371 u8 unicast_limit = max(1, max_probe_tries - 3); 3372 struct sta_info *sta; 3373 3374 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3375 3376 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3377 return; 3378 3379 /* 3380 * Try sending broadcast probe requests for the last three 3381 * probe requests after the first ones failed since some 3382 * buggy APs only support broadcast probe requests. 3383 */ 3384 if (ifmgd->probe_send_count >= unicast_limit) 3385 dst = NULL; 3386 3387 /* 3388 * When the hardware reports an accurate Tx ACK status, it's 3389 * better to send a nullfunc frame instead of a probe request, 3390 * as it will kick us off the AP quickly if we aren't associated 3391 * anymore. The timeout will be reset if the frame is ACKed by 3392 * the AP. 3393 */ 3394 ifmgd->probe_send_count++; 3395 3396 if (dst) { 3397 sta = sta_info_get(sdata, dst); 3398 if (!WARN_ON(!sta)) 3399 ieee80211_check_fast_rx(sta); 3400 } 3401 3402 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3403 ifmgd->nullfunc_failed = false; 3404 ieee80211_send_nullfunc(sdata->local, sdata, false); 3405 } else { 3406 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3407 sdata->vif.cfg.ssid, 3408 sdata->vif.cfg.ssid_len, 3409 sdata->deflink.conf->bss->channel); 3410 } 3411 3412 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3413 run_again(sdata, ifmgd->probe_timeout); 3414 } 3415 3416 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3417 bool beacon) 3418 { 3419 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3420 bool already = false; 3421 3422 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3423 3424 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3425 return; 3426 3427 if (!ieee80211_sdata_running(sdata)) 3428 return; 3429 3430 if (!ifmgd->associated) 3431 return; 3432 3433 if (sdata->local->tmp_channel || sdata->local->scanning) 3434 return; 3435 3436 if (sdata->local->suspending) { 3437 /* reschedule after resume */ 3438 ieee80211_reset_ap_probe(sdata); 3439 return; 3440 } 3441 3442 if (beacon) { 3443 mlme_dbg_ratelimited(sdata, 3444 "detected beacon loss from AP (missed %d beacons) - probing\n", 3445 beacon_loss_count); 3446 3447 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3448 } 3449 3450 /* 3451 * The driver/our work has already reported this event or the 3452 * connection monitoring has kicked in and we have already sent 3453 * a probe request. Or maybe the AP died and the driver keeps 3454 * reporting until we disassociate... 3455 * 3456 * In either case we have to ignore the current call to this 3457 * function (except for setting the correct probe reason bit) 3458 * because otherwise we would reset the timer every time and 3459 * never check whether we received a probe response! 3460 */ 3461 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3462 already = true; 3463 3464 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3465 3466 if (already) 3467 return; 3468 3469 ieee80211_recalc_ps(sdata->local); 3470 3471 ifmgd->probe_send_count = 0; 3472 ieee80211_mgd_probe_ap_send(sdata); 3473 } 3474 3475 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3476 struct ieee80211_vif *vif) 3477 { 3478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3479 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3480 struct cfg80211_bss *cbss; 3481 struct sk_buff *skb; 3482 const struct element *ssid; 3483 int ssid_len; 3484 3485 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3486 3487 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3488 ieee80211_vif_is_mld(&sdata->vif))) 3489 return NULL; 3490 3491 if (ifmgd->associated) 3492 cbss = sdata->deflink.conf->bss; 3493 else if (ifmgd->auth_data) 3494 cbss = ifmgd->auth_data->bss; 3495 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3496 cbss = ifmgd->assoc_data->link[0].bss; 3497 else 3498 return NULL; 3499 3500 rcu_read_lock(); 3501 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3502 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3503 "invalid SSID element (len=%d)", 3504 ssid ? ssid->datalen : -1)) 3505 ssid_len = 0; 3506 else 3507 ssid_len = ssid->datalen; 3508 3509 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3510 (u32) -1, cbss->channel, 3511 ssid->data, ssid_len, 3512 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3513 rcu_read_unlock(); 3514 3515 return skb; 3516 } 3517 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3518 3519 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3520 const u8 *buf, size_t len, bool tx, 3521 u16 reason, bool reconnect) 3522 { 3523 struct ieee80211_event event = { 3524 .type = MLME_EVENT, 3525 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3526 .u.mlme.reason = reason, 3527 }; 3528 3529 if (tx) 3530 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3531 else 3532 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3533 3534 drv_event_callback(sdata->local, sdata, &event); 3535 } 3536 3537 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3538 { 3539 struct ieee80211_local *local = sdata->local; 3540 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3541 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3542 bool tx; 3543 3544 lockdep_assert_wiphy(local->hw.wiphy); 3545 3546 if (!ifmgd->associated) 3547 return; 3548 3549 /* in MLO assume we have a link where we can TX the frame */ 3550 tx = ieee80211_vif_is_mld(&sdata->vif) || 3551 !sdata->deflink.csa_block_tx; 3552 3553 if (!ifmgd->driver_disconnect) { 3554 unsigned int link_id; 3555 3556 /* 3557 * AP is probably out of range (or not reachable for another 3558 * reason) so remove the bss structs for that AP. In the case 3559 * of multi-link, it's not clear that all of them really are 3560 * out of range, but if they weren't the driver likely would 3561 * have switched to just have a single link active? 3562 */ 3563 for (link_id = 0; 3564 link_id < ARRAY_SIZE(sdata->link); 3565 link_id++) { 3566 struct ieee80211_link_data *link; 3567 3568 link = sdata_dereference(sdata->link[link_id], sdata); 3569 if (!link) 3570 continue; 3571 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 3572 link->conf->bss = NULL; 3573 } 3574 } 3575 3576 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3577 ifmgd->driver_disconnect ? 3578 WLAN_REASON_DEAUTH_LEAVING : 3579 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3580 tx, frame_buf); 3581 /* the other links will be destroyed */ 3582 sdata->vif.bss_conf.csa_active = false; 3583 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3584 if (sdata->deflink.csa_block_tx) { 3585 ieee80211_wake_vif_queues(local, sdata, 3586 IEEE80211_QUEUE_STOP_REASON_CSA); 3587 sdata->deflink.csa_block_tx = false; 3588 } 3589 3590 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3591 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3592 ifmgd->reconnect); 3593 ifmgd->reconnect = false; 3594 } 3595 3596 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3597 struct wiphy_work *work) 3598 { 3599 struct ieee80211_sub_if_data *sdata = 3600 container_of(work, struct ieee80211_sub_if_data, 3601 u.mgd.beacon_connection_loss_work); 3602 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3603 3604 if (ifmgd->connection_loss) { 3605 sdata_info(sdata, "Connection to AP %pM lost\n", 3606 sdata->vif.cfg.ap_addr); 3607 __ieee80211_disconnect(sdata); 3608 ifmgd->connection_loss = false; 3609 } else if (ifmgd->driver_disconnect) { 3610 sdata_info(sdata, 3611 "Driver requested disconnection from AP %pM\n", 3612 sdata->vif.cfg.ap_addr); 3613 __ieee80211_disconnect(sdata); 3614 ifmgd->driver_disconnect = false; 3615 } else { 3616 if (ifmgd->associated) 3617 sdata->deflink.u.mgd.beacon_loss_count++; 3618 ieee80211_mgd_probe_ap(sdata, true); 3619 } 3620 } 3621 3622 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3623 struct wiphy_work *work) 3624 { 3625 struct ieee80211_sub_if_data *sdata = 3626 container_of(work, struct ieee80211_sub_if_data, 3627 u.mgd.csa_connection_drop_work); 3628 3629 __ieee80211_disconnect(sdata); 3630 } 3631 3632 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3633 { 3634 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3635 struct ieee80211_hw *hw = &sdata->local->hw; 3636 3637 trace_api_beacon_loss(sdata); 3638 3639 sdata->u.mgd.connection_loss = false; 3640 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3641 } 3642 EXPORT_SYMBOL(ieee80211_beacon_loss); 3643 3644 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3645 { 3646 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3647 struct ieee80211_hw *hw = &sdata->local->hw; 3648 3649 trace_api_connection_loss(sdata); 3650 3651 sdata->u.mgd.connection_loss = true; 3652 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3653 } 3654 EXPORT_SYMBOL(ieee80211_connection_loss); 3655 3656 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3657 { 3658 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3659 struct ieee80211_hw *hw = &sdata->local->hw; 3660 3661 trace_api_disconnect(sdata, reconnect); 3662 3663 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3664 return; 3665 3666 sdata->u.mgd.driver_disconnect = true; 3667 sdata->u.mgd.reconnect = reconnect; 3668 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3669 } 3670 EXPORT_SYMBOL(ieee80211_disconnect); 3671 3672 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3673 bool assoc) 3674 { 3675 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3676 3677 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3678 3679 if (!assoc) { 3680 /* 3681 * we are not authenticated yet, the only timer that could be 3682 * running is the timeout for the authentication response which 3683 * which is not relevant anymore. 3684 */ 3685 del_timer_sync(&sdata->u.mgd.timer); 3686 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3687 3688 /* other links are destroyed */ 3689 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3690 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3691 BSS_CHANGED_BSSID); 3692 sdata->u.mgd.flags = 0; 3693 3694 ieee80211_link_release_channel(&sdata->deflink); 3695 ieee80211_vif_set_links(sdata, 0, 0); 3696 } 3697 3698 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3699 kfree(auth_data); 3700 sdata->u.mgd.auth_data = NULL; 3701 } 3702 3703 enum assoc_status { 3704 ASSOC_SUCCESS, 3705 ASSOC_REJECTED, 3706 ASSOC_TIMEOUT, 3707 ASSOC_ABANDON, 3708 }; 3709 3710 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3711 enum assoc_status status) 3712 { 3713 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3714 3715 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3716 3717 if (status != ASSOC_SUCCESS) { 3718 /* 3719 * we are not associated yet, the only timer that could be 3720 * running is the timeout for the association response which 3721 * which is not relevant anymore. 3722 */ 3723 del_timer_sync(&sdata->u.mgd.timer); 3724 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3725 3726 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3727 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3728 BSS_CHANGED_BSSID); 3729 sdata->u.mgd.flags = 0; 3730 sdata->vif.bss_conf.mu_mimo_owner = false; 3731 3732 if (status != ASSOC_REJECTED) { 3733 struct cfg80211_assoc_failure data = { 3734 .timeout = status == ASSOC_TIMEOUT, 3735 }; 3736 int i; 3737 3738 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3739 ARRAY_SIZE(assoc_data->link)); 3740 3741 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3742 data.bss[i] = assoc_data->link[i].bss; 3743 3744 if (ieee80211_vif_is_mld(&sdata->vif)) 3745 data.ap_mld_addr = assoc_data->ap_addr; 3746 3747 cfg80211_assoc_failure(sdata->dev, &data); 3748 } 3749 3750 ieee80211_link_release_channel(&sdata->deflink); 3751 ieee80211_vif_set_links(sdata, 0, 0); 3752 } 3753 3754 kfree(assoc_data); 3755 sdata->u.mgd.assoc_data = NULL; 3756 } 3757 3758 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3759 struct ieee80211_mgmt *mgmt, size_t len) 3760 { 3761 struct ieee80211_local *local = sdata->local; 3762 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3763 const struct element *challenge; 3764 u8 *pos; 3765 u32 tx_flags = 0; 3766 struct ieee80211_prep_tx_info info = { 3767 .subtype = IEEE80211_STYPE_AUTH, 3768 .link_id = auth_data->link_id, 3769 }; 3770 3771 pos = mgmt->u.auth.variable; 3772 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3773 len - (pos - (u8 *)mgmt)); 3774 if (!challenge) 3775 return; 3776 auth_data->expected_transaction = 4; 3777 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3778 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3779 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3780 IEEE80211_TX_INTFL_MLME_CONN_TX; 3781 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3782 (void *)challenge, 3783 challenge->datalen + sizeof(*challenge), 3784 auth_data->ap_addr, auth_data->ap_addr, 3785 auth_data->key, auth_data->key_len, 3786 auth_data->key_idx, tx_flags); 3787 } 3788 3789 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3790 { 3791 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3792 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3793 struct sta_info *sta; 3794 3795 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3796 3797 sdata_info(sdata, "authenticated\n"); 3798 ifmgd->auth_data->done = true; 3799 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3800 ifmgd->auth_data->timeout_started = true; 3801 run_again(sdata, ifmgd->auth_data->timeout); 3802 3803 /* move station state to auth */ 3804 sta = sta_info_get(sdata, ap_addr); 3805 if (!sta) { 3806 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3807 return false; 3808 } 3809 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3810 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3811 return false; 3812 } 3813 3814 return true; 3815 } 3816 3817 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3818 struct ieee80211_mgmt *mgmt, size_t len) 3819 { 3820 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3821 u16 auth_alg, auth_transaction, status_code; 3822 struct ieee80211_event event = { 3823 .type = MLME_EVENT, 3824 .u.mlme.data = AUTH_EVENT, 3825 }; 3826 struct ieee80211_prep_tx_info info = { 3827 .subtype = IEEE80211_STYPE_AUTH, 3828 }; 3829 3830 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3831 3832 if (len < 24 + 6) 3833 return; 3834 3835 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3836 return; 3837 3838 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3839 return; 3840 3841 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3842 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3843 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3844 3845 if (auth_alg != ifmgd->auth_data->algorithm || 3846 (auth_alg != WLAN_AUTH_SAE && 3847 auth_transaction != ifmgd->auth_data->expected_transaction) || 3848 (auth_alg == WLAN_AUTH_SAE && 3849 (auth_transaction < ifmgd->auth_data->expected_transaction || 3850 auth_transaction > 2))) { 3851 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3852 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3853 auth_transaction, 3854 ifmgd->auth_data->expected_transaction); 3855 goto notify_driver; 3856 } 3857 3858 if (status_code != WLAN_STATUS_SUCCESS) { 3859 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3860 3861 if (auth_alg == WLAN_AUTH_SAE && 3862 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3863 (auth_transaction == 1 && 3864 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3865 status_code == WLAN_STATUS_SAE_PK)))) { 3866 /* waiting for userspace now */ 3867 ifmgd->auth_data->waiting = true; 3868 ifmgd->auth_data->timeout = 3869 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3870 ifmgd->auth_data->timeout_started = true; 3871 run_again(sdata, ifmgd->auth_data->timeout); 3872 goto notify_driver; 3873 } 3874 3875 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3876 mgmt->sa, status_code); 3877 ieee80211_destroy_auth_data(sdata, false); 3878 event.u.mlme.status = MLME_DENIED; 3879 event.u.mlme.reason = status_code; 3880 drv_event_callback(sdata->local, sdata, &event); 3881 goto notify_driver; 3882 } 3883 3884 switch (ifmgd->auth_data->algorithm) { 3885 case WLAN_AUTH_OPEN: 3886 case WLAN_AUTH_LEAP: 3887 case WLAN_AUTH_FT: 3888 case WLAN_AUTH_SAE: 3889 case WLAN_AUTH_FILS_SK: 3890 case WLAN_AUTH_FILS_SK_PFS: 3891 case WLAN_AUTH_FILS_PK: 3892 break; 3893 case WLAN_AUTH_SHARED_KEY: 3894 if (ifmgd->auth_data->expected_transaction != 4) { 3895 ieee80211_auth_challenge(sdata, mgmt, len); 3896 /* need another frame */ 3897 return; 3898 } 3899 break; 3900 default: 3901 WARN_ONCE(1, "invalid auth alg %d", 3902 ifmgd->auth_data->algorithm); 3903 goto notify_driver; 3904 } 3905 3906 event.u.mlme.status = MLME_SUCCESS; 3907 info.success = 1; 3908 drv_event_callback(sdata->local, sdata, &event); 3909 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3910 (auth_transaction == 2 && 3911 ifmgd->auth_data->expected_transaction == 2)) { 3912 if (!ieee80211_mark_sta_auth(sdata)) 3913 return; /* ignore frame -- wait for timeout */ 3914 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3915 auth_transaction == 2) { 3916 sdata_info(sdata, "SAE peer confirmed\n"); 3917 ifmgd->auth_data->peer_confirmed = true; 3918 } 3919 3920 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3921 notify_driver: 3922 drv_mgd_complete_tx(sdata->local, sdata, &info); 3923 } 3924 3925 #define case_WLAN(type) \ 3926 case WLAN_REASON_##type: return #type 3927 3928 const char *ieee80211_get_reason_code_string(u16 reason_code) 3929 { 3930 switch (reason_code) { 3931 case_WLAN(UNSPECIFIED); 3932 case_WLAN(PREV_AUTH_NOT_VALID); 3933 case_WLAN(DEAUTH_LEAVING); 3934 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3935 case_WLAN(DISASSOC_AP_BUSY); 3936 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3937 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3938 case_WLAN(DISASSOC_STA_HAS_LEFT); 3939 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3940 case_WLAN(DISASSOC_BAD_POWER); 3941 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3942 case_WLAN(INVALID_IE); 3943 case_WLAN(MIC_FAILURE); 3944 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3945 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3946 case_WLAN(IE_DIFFERENT); 3947 case_WLAN(INVALID_GROUP_CIPHER); 3948 case_WLAN(INVALID_PAIRWISE_CIPHER); 3949 case_WLAN(INVALID_AKMP); 3950 case_WLAN(UNSUPP_RSN_VERSION); 3951 case_WLAN(INVALID_RSN_IE_CAP); 3952 case_WLAN(IEEE8021X_FAILED); 3953 case_WLAN(CIPHER_SUITE_REJECTED); 3954 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 3955 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 3956 case_WLAN(DISASSOC_LOW_ACK); 3957 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 3958 case_WLAN(QSTA_LEAVE_QBSS); 3959 case_WLAN(QSTA_NOT_USE); 3960 case_WLAN(QSTA_REQUIRE_SETUP); 3961 case_WLAN(QSTA_TIMEOUT); 3962 case_WLAN(QSTA_CIPHER_NOT_SUPP); 3963 case_WLAN(MESH_PEER_CANCELED); 3964 case_WLAN(MESH_MAX_PEERS); 3965 case_WLAN(MESH_CONFIG); 3966 case_WLAN(MESH_CLOSE); 3967 case_WLAN(MESH_MAX_RETRIES); 3968 case_WLAN(MESH_CONFIRM_TIMEOUT); 3969 case_WLAN(MESH_INVALID_GTK); 3970 case_WLAN(MESH_INCONSISTENT_PARAM); 3971 case_WLAN(MESH_INVALID_SECURITY); 3972 case_WLAN(MESH_PATH_ERROR); 3973 case_WLAN(MESH_PATH_NOFORWARD); 3974 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 3975 case_WLAN(MAC_EXISTS_IN_MBSS); 3976 case_WLAN(MESH_CHAN_REGULATORY); 3977 case_WLAN(MESH_CHAN); 3978 default: return "<unknown>"; 3979 } 3980 } 3981 3982 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 3983 struct ieee80211_mgmt *mgmt, size_t len) 3984 { 3985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3986 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 3987 3988 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3989 3990 if (len < 24 + 2) 3991 return; 3992 3993 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 3994 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 3995 return; 3996 } 3997 3998 if (ifmgd->associated && 3999 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4000 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4001 sdata->vif.cfg.ap_addr, reason_code, 4002 ieee80211_get_reason_code_string(reason_code)); 4003 4004 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4005 4006 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4007 reason_code, false); 4008 return; 4009 } 4010 4011 if (ifmgd->assoc_data && 4012 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4013 sdata_info(sdata, 4014 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4015 ifmgd->assoc_data->ap_addr, reason_code, 4016 ieee80211_get_reason_code_string(reason_code)); 4017 4018 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4019 4020 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4021 return; 4022 } 4023 } 4024 4025 4026 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4027 struct ieee80211_mgmt *mgmt, size_t len) 4028 { 4029 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4030 u16 reason_code; 4031 4032 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4033 4034 if (len < 24 + 2) 4035 return; 4036 4037 if (!ifmgd->associated || 4038 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4039 return; 4040 4041 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4042 4043 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4044 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4045 return; 4046 } 4047 4048 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4049 sdata->vif.cfg.ap_addr, reason_code, 4050 ieee80211_get_reason_code_string(reason_code)); 4051 4052 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4053 4054 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4055 false); 4056 } 4057 4058 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4059 u8 *supp_rates, unsigned int supp_rates_len, 4060 u32 *rates, u32 *basic_rates, 4061 bool *have_higher_than_11mbit, 4062 int *min_rate, int *min_rate_index) 4063 { 4064 int i, j; 4065 4066 for (i = 0; i < supp_rates_len; i++) { 4067 int rate = supp_rates[i] & 0x7f; 4068 bool is_basic = !!(supp_rates[i] & 0x80); 4069 4070 if ((rate * 5) > 110) 4071 *have_higher_than_11mbit = true; 4072 4073 /* 4074 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4075 * selectors since they're not rates. 4076 * 4077 * Note: Even though the membership selector and the basic 4078 * rate flag share the same bit, they are not exactly 4079 * the same. 4080 */ 4081 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4082 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4083 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4084 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4085 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4086 continue; 4087 4088 for (j = 0; j < sband->n_bitrates; j++) { 4089 struct ieee80211_rate *br; 4090 int brate; 4091 4092 br = &sband->bitrates[j]; 4093 4094 brate = DIV_ROUND_UP(br->bitrate, 5); 4095 if (brate == rate) { 4096 *rates |= BIT(j); 4097 if (is_basic) 4098 *basic_rates |= BIT(j); 4099 if ((rate * 5) < *min_rate) { 4100 *min_rate = rate * 5; 4101 *min_rate_index = j; 4102 } 4103 break; 4104 } 4105 } 4106 } 4107 } 4108 4109 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4110 struct ieee80211_supported_band *sband, 4111 const struct link_sta_info *link_sta, 4112 const struct ieee802_11_elems *elems) 4113 { 4114 const struct ieee80211_sta_he_cap *own_he_cap = 4115 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4116 4117 if (elems->ext_capab_len < 10) 4118 return false; 4119 4120 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4121 return false; 4122 4123 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4124 IEEE80211_HE_MAC_CAP0_TWT_RES && 4125 own_he_cap && 4126 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4127 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4128 } 4129 4130 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4131 struct ieee80211_supported_band *sband, 4132 struct ieee80211_link_data *link, 4133 struct link_sta_info *link_sta, 4134 struct ieee802_11_elems *elems) 4135 { 4136 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4137 4138 if (link->conf->twt_requester != twt) { 4139 link->conf->twt_requester = twt; 4140 return BSS_CHANGED_TWT; 4141 } 4142 return 0; 4143 } 4144 4145 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4146 struct ieee80211_bss_conf *bss_conf, 4147 struct ieee80211_supported_band *sband, 4148 struct link_sta_info *link_sta) 4149 { 4150 const struct ieee80211_sta_he_cap *own_he_cap = 4151 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4152 4153 return bss_conf->he_support && 4154 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4155 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4156 own_he_cap && 4157 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4158 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4159 } 4160 4161 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4162 struct link_sta_info *link_sta, 4163 struct cfg80211_bss *cbss, 4164 struct ieee80211_mgmt *mgmt, 4165 const u8 *elem_start, 4166 unsigned int elem_len, 4167 u64 *changed) 4168 { 4169 struct ieee80211_sub_if_data *sdata = link->sdata; 4170 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4171 struct ieee80211_bss_conf *bss_conf = link->conf; 4172 struct ieee80211_local *local = sdata->local; 4173 unsigned int link_id = link->link_id; 4174 struct ieee80211_elems_parse_params parse_params = { 4175 .mode = link->u.mgd.conn.mode, 4176 .start = elem_start, 4177 .len = elem_len, 4178 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4179 .from_ap = true, 4180 }; 4181 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4182 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4183 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4184 const struct cfg80211_bss_ies *bss_ies = NULL; 4185 struct ieee80211_supported_band *sband; 4186 struct ieee802_11_elems *elems; 4187 const __le16 prof_bss_param_ch_present = 4188 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4189 u16 capab_info; 4190 bool ret; 4191 4192 elems = ieee802_11_parse_elems_full(&parse_params); 4193 if (!elems) 4194 return false; 4195 4196 if (link_id == assoc_data->assoc_link_id) { 4197 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4198 4199 /* 4200 * we should not get to this flow unless the association was 4201 * successful, so set the status directly to success 4202 */ 4203 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4204 if (elems->ml_basic) { 4205 int bss_param_ch_cnt = 4206 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4207 4208 if (bss_param_ch_cnt < 0) { 4209 ret = false; 4210 goto out; 4211 } 4212 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; 4213 } 4214 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4215 !elems->prof || 4216 !(elems->prof->control & prof_bss_param_ch_present)) { 4217 ret = false; 4218 goto out; 4219 } else { 4220 const u8 *ptr = elems->prof->variable + 4221 elems->prof->sta_info_len - 1; 4222 4223 /* 4224 * During parsing, we validated that these fields exist, 4225 * otherwise elems->prof would have been set to NULL. 4226 */ 4227 capab_info = get_unaligned_le16(ptr); 4228 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4229 link->u.mgd.bss_param_ch_cnt = 4230 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4231 4232 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4233 link_info(link, "association response status code=%u\n", 4234 assoc_data->link[link_id].status); 4235 ret = true; 4236 goto out; 4237 } 4238 } 4239 4240 if (!is_s1g && !elems->supp_rates) { 4241 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4242 ret = false; 4243 goto out; 4244 } 4245 4246 link->u.mgd.tdls_chan_switch_prohibited = 4247 elems->ext_capab && elems->ext_capab_len >= 5 && 4248 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4249 4250 /* 4251 * Some APs are erroneously not including some information in their 4252 * (re)association response frames. Try to recover by using the data 4253 * from the beacon or probe response. This seems to afflict mobile 4254 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4255 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4256 */ 4257 if (!is_6ghz && 4258 ((assoc_data->wmm && !elems->wmm_param) || 4259 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4260 (!elems->ht_cap_elem || !elems->ht_operation)) || 4261 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4262 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4263 const struct cfg80211_bss_ies *ies; 4264 struct ieee802_11_elems *bss_elems; 4265 4266 rcu_read_lock(); 4267 ies = rcu_dereference(cbss->ies); 4268 if (ies) 4269 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4270 GFP_ATOMIC); 4271 rcu_read_unlock(); 4272 if (!bss_ies) { 4273 ret = false; 4274 goto out; 4275 } 4276 4277 parse_params.start = bss_ies->data; 4278 parse_params.len = bss_ies->len; 4279 parse_params.bss = cbss; 4280 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4281 if (!bss_elems) { 4282 ret = false; 4283 goto out; 4284 } 4285 4286 if (assoc_data->wmm && 4287 !elems->wmm_param && bss_elems->wmm_param) { 4288 elems->wmm_param = bss_elems->wmm_param; 4289 sdata_info(sdata, 4290 "AP bug: WMM param missing from AssocResp\n"); 4291 } 4292 4293 /* 4294 * Also check if we requested HT/VHT, otherwise the AP doesn't 4295 * have to include the IEs in the (re)association response. 4296 */ 4297 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4298 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4299 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4300 sdata_info(sdata, 4301 "AP bug: HT capability missing from AssocResp\n"); 4302 } 4303 if (!elems->ht_operation && bss_elems->ht_operation && 4304 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4305 elems->ht_operation = bss_elems->ht_operation; 4306 sdata_info(sdata, 4307 "AP bug: HT operation missing from AssocResp\n"); 4308 } 4309 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4310 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4311 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4312 sdata_info(sdata, 4313 "AP bug: VHT capa missing from AssocResp\n"); 4314 } 4315 if (!elems->vht_operation && bss_elems->vht_operation && 4316 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4317 elems->vht_operation = bss_elems->vht_operation; 4318 sdata_info(sdata, 4319 "AP bug: VHT operation missing from AssocResp\n"); 4320 } 4321 4322 kfree(bss_elems); 4323 } 4324 4325 /* 4326 * We previously checked these in the beacon/probe response, so 4327 * they should be present here. This is just a safety net. 4328 * Note that the ieee80211_config_bw() below would also check 4329 * for this (and more), but this has better error reporting. 4330 */ 4331 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4332 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4333 sdata_info(sdata, 4334 "HT AP is missing WMM params or HT capability/operation\n"); 4335 ret = false; 4336 goto out; 4337 } 4338 4339 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4340 (!elems->vht_cap_elem || !elems->vht_operation)) { 4341 sdata_info(sdata, 4342 "VHT AP is missing VHT capability/operation\n"); 4343 ret = false; 4344 goto out; 4345 } 4346 4347 /* check/update if AP changed anything in assoc response vs. scan */ 4348 if (ieee80211_config_bw(link, elems, 4349 link_id == assoc_data->assoc_link_id, 4350 changed)) { 4351 ret = false; 4352 goto out; 4353 } 4354 4355 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4356 ret = false; 4357 goto out; 4358 } 4359 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4360 4361 /* Set up internal HT/VHT capabilities */ 4362 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4363 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4364 elems->ht_cap_elem, 4365 link_sta); 4366 4367 if (elems->vht_cap_elem && 4368 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4369 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4370 const struct cfg80211_bss_ies *ies; 4371 4372 /* 4373 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4374 * too large maximum MPDU length in the association response 4375 * (indicating 12k) that it cannot actually process ... 4376 * Work around that. 4377 */ 4378 rcu_read_lock(); 4379 ies = rcu_dereference(cbss->ies); 4380 if (ies) { 4381 const struct element *elem; 4382 4383 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4384 ies->data, ies->len); 4385 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4386 bss_vht_cap = (const void *)elem->data; 4387 } 4388 4389 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4390 elems->vht_cap_elem, 4391 bss_vht_cap, link_sta); 4392 rcu_read_unlock(); 4393 } 4394 4395 if (elems->he_operation && 4396 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4397 elems->he_cap) { 4398 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 4399 4400 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4401 elems->he_cap, 4402 elems->he_cap_len, 4403 elems->he_6ghz_capa, 4404 link_sta); 4405 4406 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 4407 4408 if (is_6ghz && he_6ghz_oper) { 4409 switch (u8_get_bits(he_6ghz_oper->control, 4410 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 4411 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 4412 bss_conf->power_type = IEEE80211_REG_LPI_AP; 4413 break; 4414 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 4415 bss_conf->power_type = IEEE80211_REG_SP_AP; 4416 break; 4417 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 4418 bss_conf->power_type = IEEE80211_REG_VLP_AP; 4419 break; 4420 default: 4421 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 4422 break; 4423 } 4424 } else if (is_6ghz) { 4425 link_info(link, 4426 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 4427 bss_conf->chanreq.oper.chan->center_freq); 4428 } 4429 4430 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4431 if (elems->rsnx && elems->rsnx_len && 4432 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4433 wiphy_ext_feature_isset(local->hw.wiphy, 4434 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4435 bss_conf->twt_protected = true; 4436 else 4437 bss_conf->twt_protected = false; 4438 4439 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4440 link_sta, elems); 4441 4442 if (elems->eht_operation && elems->eht_cap && 4443 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4444 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4445 elems->he_cap, 4446 elems->he_cap_len, 4447 elems->eht_cap, 4448 elems->eht_cap_len, 4449 link_sta); 4450 4451 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4452 } else { 4453 bss_conf->eht_support = false; 4454 } 4455 } else { 4456 bss_conf->he_support = false; 4457 bss_conf->twt_requester = false; 4458 bss_conf->twt_protected = false; 4459 bss_conf->eht_support = false; 4460 } 4461 4462 bss_conf->twt_broadcast = 4463 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4464 4465 if (bss_conf->he_support) { 4466 bss_conf->he_bss_color.color = 4467 le32_get_bits(elems->he_operation->he_oper_params, 4468 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4469 bss_conf->he_bss_color.partial = 4470 le32_get_bits(elems->he_operation->he_oper_params, 4471 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4472 bss_conf->he_bss_color.enabled = 4473 !le32_get_bits(elems->he_operation->he_oper_params, 4474 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4475 4476 if (bss_conf->he_bss_color.enabled) 4477 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4478 4479 bss_conf->htc_trig_based_pkt_ext = 4480 le32_get_bits(elems->he_operation->he_oper_params, 4481 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4482 bss_conf->frame_time_rts_th = 4483 le32_get_bits(elems->he_operation->he_oper_params, 4484 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4485 4486 bss_conf->uora_exists = !!elems->uora_element; 4487 if (elems->uora_element) 4488 bss_conf->uora_ocw_range = elems->uora_element[0]; 4489 4490 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4491 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4492 /* TODO: OPEN: what happens if BSS color disable is set? */ 4493 } 4494 4495 if (cbss->transmitted_bss) { 4496 bss_conf->nontransmitted = true; 4497 ether_addr_copy(bss_conf->transmitter_bssid, 4498 cbss->transmitted_bss->bssid); 4499 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4500 bss_conf->bssid_index = cbss->bssid_index; 4501 } 4502 4503 /* 4504 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4505 * in their association response, so ignore that data for our own 4506 * configuration. If it changed since the last beacon, we'll get the 4507 * next beacon and update then. 4508 */ 4509 4510 /* 4511 * If an operating mode notification IE is present, override the 4512 * NSS calculation (that would be done in rate_control_rate_init()) 4513 * and use the # of streams from that element. 4514 */ 4515 if (elems->opmode_notif && 4516 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4517 u8 nss; 4518 4519 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4520 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4521 nss += 1; 4522 link_sta->pub->rx_nss = nss; 4523 } 4524 4525 /* 4526 * Always handle WMM once after association regardless 4527 * of the first value the AP uses. Setting -1 here has 4528 * that effect because the AP values is an unsigned 4529 * 4-bit value. 4530 */ 4531 link->u.mgd.wmm_last_param_set = -1; 4532 link->u.mgd.mu_edca_last_param_set = -1; 4533 4534 if (link->u.mgd.disable_wmm_tracking) { 4535 ieee80211_set_wmm_default(link, false, false); 4536 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4537 elems->wmm_param_len, 4538 elems->mu_edca_param_set)) { 4539 /* still enable QoS since we might have HT/VHT */ 4540 ieee80211_set_wmm_default(link, false, true); 4541 /* disable WMM tracking in this case to disable 4542 * tracking WMM parameter changes in the beacon if 4543 * the parameters weren't actually valid. Doing so 4544 * avoids changing parameters very strangely when 4545 * the AP is going back and forth between valid and 4546 * invalid parameters. 4547 */ 4548 link->u.mgd.disable_wmm_tracking = true; 4549 } 4550 4551 if (elems->max_idle_period_ie) { 4552 bss_conf->max_idle_period = 4553 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4554 bss_conf->protected_keep_alive = 4555 !!(elems->max_idle_period_ie->idle_options & 4556 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4557 *changed |= BSS_CHANGED_KEEP_ALIVE; 4558 } else { 4559 bss_conf->max_idle_period = 0; 4560 bss_conf->protected_keep_alive = false; 4561 } 4562 4563 /* set assoc capability (AID was already set earlier), 4564 * ieee80211_set_associated() will tell the driver */ 4565 bss_conf->assoc_capability = capab_info; 4566 4567 ret = true; 4568 out: 4569 kfree(elems); 4570 kfree(bss_ies); 4571 return ret; 4572 } 4573 4574 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4575 struct sta_info *sta, 4576 struct link_sta_info *link_sta, 4577 struct cfg80211_bss *cbss) 4578 { 4579 struct ieee80211_sub_if_data *sdata = link->sdata; 4580 struct ieee80211_local *local = sdata->local; 4581 struct ieee80211_bss *bss = (void *)cbss->priv; 4582 u32 rates = 0, basic_rates = 0; 4583 bool have_higher_than_11mbit = false; 4584 int min_rate = INT_MAX, min_rate_index = -1; 4585 struct ieee80211_supported_band *sband; 4586 4587 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4588 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4589 4590 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4591 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4592 ieee80211_s1g_sta_rate_init(sta); 4593 return 0; 4594 } 4595 4596 sband = local->hw.wiphy->bands[cbss->channel->band]; 4597 4598 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4599 &rates, &basic_rates, &have_higher_than_11mbit, 4600 &min_rate, &min_rate_index); 4601 4602 /* 4603 * This used to be a workaround for basic rates missing 4604 * in the association response frame. Now that we no 4605 * longer use the basic rates from there, it probably 4606 * doesn't happen any more, but keep the workaround so 4607 * in case some *other* APs are buggy in different ways 4608 * we can connect -- with a warning. 4609 * Allow this workaround only in case the AP provided at least 4610 * one rate. 4611 */ 4612 if (min_rate_index < 0) { 4613 link_info(link, "No legacy rates in association response\n"); 4614 return -EINVAL; 4615 } else if (!basic_rates) { 4616 link_info(link, "No basic rates, using min rate instead\n"); 4617 basic_rates = BIT(min_rate_index); 4618 } 4619 4620 if (rates) 4621 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4622 else 4623 link_info(link, "No rates found, keeping mandatory only\n"); 4624 4625 link->conf->basic_rates = basic_rates; 4626 4627 /* cf. IEEE 802.11 9.2.12 */ 4628 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4629 have_higher_than_11mbit; 4630 4631 return 0; 4632 } 4633 4634 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4635 struct cfg80211_bss *cbss) 4636 { 4637 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4638 const struct element *ht_cap_elem, *vht_cap_elem; 4639 const struct cfg80211_bss_ies *ies; 4640 const struct ieee80211_ht_cap *ht_cap; 4641 const struct ieee80211_vht_cap *vht_cap; 4642 const struct ieee80211_he_cap_elem *he_cap; 4643 const struct element *he_cap_elem; 4644 u16 mcs_80_map, mcs_160_map; 4645 int i, mcs_nss_size; 4646 bool support_160; 4647 u8 chains = 1; 4648 4649 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 4650 return chains; 4651 4652 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4653 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4654 ht_cap = (void *)ht_cap_elem->data; 4655 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4656 /* 4657 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4658 * "Tx Unequal Modulation Supported" fields. 4659 */ 4660 } 4661 4662 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 4663 return chains; 4664 4665 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4666 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4667 u8 nss; 4668 u16 tx_mcs_map; 4669 4670 vht_cap = (void *)vht_cap_elem->data; 4671 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4672 for (nss = 8; nss > 0; nss--) { 4673 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4674 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4675 break; 4676 } 4677 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4678 chains = max(chains, nss); 4679 } 4680 4681 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 4682 return chains; 4683 4684 ies = rcu_dereference(cbss->ies); 4685 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4686 ies->data, ies->len); 4687 4688 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4689 return chains; 4690 4691 /* skip one byte ext_tag_id */ 4692 he_cap = (void *)(he_cap_elem->data + 1); 4693 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4694 4695 /* invalid HE IE */ 4696 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4697 return chains; 4698 4699 /* mcs_nss is right after he_cap info */ 4700 he_mcs_nss_supp = (void *)(he_cap + 1); 4701 4702 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4703 4704 for (i = 7; i >= 0; i--) { 4705 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4706 4707 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4708 chains = max_t(u8, chains, i + 1); 4709 break; 4710 } 4711 } 4712 4713 support_160 = he_cap->phy_cap_info[0] & 4714 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4715 4716 if (!support_160) 4717 return chains; 4718 4719 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4720 for (i = 7; i >= 0; i--) { 4721 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4722 4723 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4724 chains = max_t(u8, chains, i + 1); 4725 break; 4726 } 4727 } 4728 4729 return chains; 4730 } 4731 4732 static void 4733 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 4734 struct ieee80211_supported_band *sband, 4735 struct cfg80211_assoc_request *req, 4736 bool wmm_used, int link_id, 4737 struct ieee80211_conn_settings *conn) 4738 { 4739 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 4740 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 4741 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 4742 const struct ieee80211_sta_he_cap *he_cap; 4743 const struct ieee80211_sta_eht_cap *eht_cap; 4744 struct ieee80211_sta_vht_cap vht_cap; 4745 4746 if (sband->band == NL80211_BAND_S1GHZ) { 4747 conn->mode = IEEE80211_CONN_MODE_S1G; 4748 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4749 mlme_dbg(sdata, "operating as S1G STA\n"); 4750 return; 4751 } 4752 4753 conn->mode = IEEE80211_CONN_MODE_LEGACY; 4754 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4755 4756 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4757 4758 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 4759 mlme_link_id_dbg(sdata, link_id, 4760 "HT disabled by flag, limiting to legacy\n"); 4761 goto out; 4762 } 4763 4764 if (!wmm_used) { 4765 mlme_link_id_dbg(sdata, link_id, 4766 "WMM/QoS not supported, limiting to legacy\n"); 4767 goto out; 4768 } 4769 4770 if (req) { 4771 unsigned int i; 4772 4773 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4774 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4775 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4776 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4777 netdev_info(sdata->dev, 4778 "WEP/TKIP use, limiting to legacy\n"); 4779 goto out; 4780 } 4781 } 4782 } 4783 4784 if (!sta_ht_cap.ht_supported && !is_6ghz) { 4785 mlme_link_id_dbg(sdata, link_id, 4786 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 4787 goto out; 4788 } 4789 4790 /* HT is fine */ 4791 conn->mode = IEEE80211_CONN_MODE_HT; 4792 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 4793 IEEE80211_CONN_BW_LIMIT_40 : 4794 IEEE80211_CONN_BW_LIMIT_20; 4795 4796 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 4797 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 4798 4799 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 4800 mlme_link_id_dbg(sdata, link_id, 4801 "VHT disabled by flag, limiting to HT\n"); 4802 goto out; 4803 } 4804 4805 if (vht_cap.vht_supported && is_5ghz) { 4806 bool have_80mhz = false; 4807 unsigned int i; 4808 4809 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 4810 mlme_link_id_dbg(sdata, link_id, 4811 "no 40 MHz support on 5 GHz, limiting to HT\n"); 4812 goto out; 4813 } 4814 4815 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4816 for (i = 0; i < sband->n_channels; i++) { 4817 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4818 IEEE80211_CHAN_NO_80MHZ)) 4819 continue; 4820 4821 have_80mhz = true; 4822 break; 4823 } 4824 4825 if (!have_80mhz) { 4826 mlme_link_id_dbg(sdata, link_id, 4827 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 4828 goto out; 4829 } 4830 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 4831 mlme_link_id_dbg(sdata, link_id, 4832 "no VHT support on 5 GHz, limiting to HT\n"); 4833 goto out; 4834 } 4835 4836 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 4837 if (sband->band != NL80211_BAND_2GHZ) { 4838 conn->mode = IEEE80211_CONN_MODE_VHT; 4839 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 4840 } 4841 4842 if (is_5ghz && 4843 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 4844 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 4845 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 4846 mlme_link_id_dbg(sdata, link_id, 4847 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 4848 } 4849 4850 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 4851 mlme_link_id_dbg(sdata, link_id, 4852 "HE disabled by flag, limiting to HT/VHT\n"); 4853 goto out; 4854 } 4855 4856 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4857 if (!he_cap) { 4858 WARN_ON(is_6ghz); 4859 mlme_link_id_dbg(sdata, link_id, 4860 "no HE support, limiting to HT/VHT\n"); 4861 goto out; 4862 } 4863 4864 /* so we have HE */ 4865 conn->mode = IEEE80211_CONN_MODE_HE; 4866 4867 /* check bandwidth */ 4868 switch (sband->band) { 4869 default: 4870 case NL80211_BAND_2GHZ: 4871 if (he_cap->he_cap_elem.phy_cap_info[0] & 4872 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 4873 break; 4874 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4875 mlme_link_id_dbg(sdata, link_id, 4876 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 4877 break; 4878 case NL80211_BAND_5GHZ: 4879 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 4880 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 4881 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4882 mlme_link_id_dbg(sdata, link_id, 4883 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 4884 break; 4885 } 4886 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 4887 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 4888 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 4889 conn->bw_limit, 4890 IEEE80211_CONN_BW_LIMIT_80); 4891 mlme_link_id_dbg(sdata, link_id, 4892 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 4893 } 4894 break; 4895 case NL80211_BAND_6GHZ: 4896 if (he_cap->he_cap_elem.phy_cap_info[0] & 4897 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 4898 break; 4899 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 4900 conn->bw_limit, 4901 IEEE80211_CONN_BW_LIMIT_80); 4902 mlme_link_id_dbg(sdata, link_id, 4903 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 4904 break; 4905 } 4906 4907 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 4908 mlme_link_id_dbg(sdata, link_id, 4909 "EHT disabled by flag, limiting to HE\n"); 4910 goto out; 4911 } 4912 4913 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4914 if (!eht_cap) { 4915 mlme_link_id_dbg(sdata, link_id, 4916 "no EHT support, limiting to HE\n"); 4917 goto out; 4918 } 4919 4920 /* we have EHT */ 4921 4922 conn->mode = IEEE80211_CONN_MODE_EHT; 4923 4924 /* check bandwidth */ 4925 if (is_6ghz && 4926 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 4927 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 4928 else if (is_6ghz) 4929 mlme_link_id_dbg(sdata, link_id, 4930 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 4931 4932 out: 4933 mlme_link_id_dbg(sdata, link_id, 4934 "determined local STA to be %s, BW limited to %d MHz\n", 4935 ieee80211_conn_mode_str(conn->mode), 4936 20 * (1 << conn->bw_limit)); 4937 } 4938 4939 static void 4940 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 4941 struct ieee80211_supported_band *sband, 4942 struct cfg80211_auth_request *req, 4943 bool wmm_used, 4944 struct ieee80211_conn_settings *conn) 4945 { 4946 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 4947 req->link_id > 0 ? req->link_id : 0, 4948 conn); 4949 } 4950 4951 static void 4952 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 4953 struct ieee80211_supported_band *sband, 4954 struct cfg80211_assoc_request *req, 4955 bool wmm_used, int link_id, 4956 struct ieee80211_conn_settings *conn) 4957 { 4958 struct ieee80211_conn_settings tmp; 4959 4960 WARN_ON(!req); 4961 4962 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 4963 &tmp); 4964 4965 conn->mode = min_t(enum ieee80211_conn_mode, 4966 conn->mode, tmp.mode); 4967 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 4968 conn->bw_limit, tmp.bw_limit); 4969 } 4970 4971 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 4972 struct ieee80211_link_data *link, 4973 int link_id, 4974 struct cfg80211_bss *cbss, bool mlo, 4975 struct ieee80211_conn_settings *conn) 4976 { 4977 struct ieee80211_local *local = sdata->local; 4978 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4979 struct ieee80211_chan_req chanreq = {}; 4980 struct ieee802_11_elems *elems; 4981 int ret; 4982 u32 i; 4983 4984 lockdep_assert_wiphy(local->hw.wiphy); 4985 4986 rcu_read_lock(); 4987 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 4988 &chanreq); 4989 4990 if (IS_ERR(elems)) { 4991 rcu_read_unlock(); 4992 return PTR_ERR(elems); 4993 } 4994 4995 if (mlo && !elems->ml_basic) { 4996 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 4997 rcu_read_unlock(); 4998 kfree(elems); 4999 return -EINVAL; 5000 } 5001 5002 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5003 struct ieee80211_bss_conf *bss_conf; 5004 u8 j = 0; 5005 5006 bss_conf = link->conf; 5007 5008 if (elems->pwr_constr_elem) 5009 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5010 5011 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5012 ARRAY_SIZE(elems->tx_pwr_env)); 5013 5014 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5015 if (elems->tx_pwr_env_len[i] > sizeof(bss_conf->tx_pwr_env[j])) 5016 continue; 5017 5018 bss_conf->tx_pwr_env_num++; 5019 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5020 elems->tx_pwr_env_len[i]); 5021 j++; 5022 } 5023 } 5024 rcu_read_unlock(); 5025 /* the element data was RCU protected so no longer valid anyway */ 5026 kfree(elems); 5027 elems = NULL; 5028 5029 if (!link) 5030 return 0; 5031 5032 rcu_read_lock(); 5033 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5034 local->rx_chains); 5035 rcu_read_unlock(); 5036 5037 /* 5038 * If this fails (possibly due to channel context sharing 5039 * on incompatible channels, e.g. 80+80 and 160 sharing the 5040 * same control channel) try to use a smaller bandwidth. 5041 */ 5042 ret = ieee80211_link_use_channel(link, &chanreq, 5043 IEEE80211_CHANCTX_SHARED); 5044 5045 /* don't downgrade for 5 and 10 MHz channels, though. */ 5046 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5047 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5048 return ret; 5049 5050 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5051 ieee80211_chanreq_downgrade(&chanreq, conn); 5052 5053 ret = ieee80211_link_use_channel(link, &chanreq, 5054 IEEE80211_CHANCTX_SHARED); 5055 } 5056 5057 return ret; 5058 } 5059 5060 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5061 u8 *dtim_count, u8 *dtim_period) 5062 { 5063 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5064 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5065 ies->len); 5066 const struct ieee80211_tim_ie *tim = NULL; 5067 const struct ieee80211_bssid_index *idx; 5068 bool valid = tim_ie && tim_ie[1] >= 2; 5069 5070 if (valid) 5071 tim = (void *)(tim_ie + 2); 5072 5073 if (dtim_count) 5074 *dtim_count = valid ? tim->dtim_count : 0; 5075 5076 if (dtim_period) 5077 *dtim_period = valid ? tim->dtim_period : 0; 5078 5079 /* Check if value is overridden by non-transmitted profile */ 5080 if (!idx_ie || idx_ie[1] < 3) 5081 return valid; 5082 5083 idx = (void *)(idx_ie + 2); 5084 5085 if (dtim_count) 5086 *dtim_count = idx->dtim_count; 5087 5088 if (dtim_period) 5089 *dtim_period = idx->dtim_period; 5090 5091 return true; 5092 } 5093 5094 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5095 struct ieee80211_mgmt *mgmt, 5096 struct ieee802_11_elems *elems, 5097 const u8 *elem_start, unsigned int elem_len) 5098 { 5099 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5100 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5101 struct ieee80211_local *local = sdata->local; 5102 unsigned int link_id; 5103 struct sta_info *sta; 5104 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5105 u16 valid_links = 0, dormant_links = 0; 5106 int err; 5107 5108 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5109 /* 5110 * station info was already allocated and inserted before 5111 * the association and should be available to us 5112 */ 5113 sta = sta_info_get(sdata, assoc_data->ap_addr); 5114 if (WARN_ON(!sta)) 5115 goto out_err; 5116 5117 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5118 5119 if (ieee80211_vif_is_mld(&sdata->vif)) { 5120 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5121 if (!assoc_data->link[link_id].bss) 5122 continue; 5123 5124 valid_links |= BIT(link_id); 5125 if (assoc_data->link[link_id].disabled) 5126 dormant_links |= BIT(link_id); 5127 5128 if (link_id != assoc_data->assoc_link_id) { 5129 err = ieee80211_sta_allocate_link(sta, link_id); 5130 if (err) 5131 goto out_err; 5132 } 5133 } 5134 5135 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5136 } 5137 5138 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5139 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5140 struct ieee80211_link_data *link; 5141 struct link_sta_info *link_sta; 5142 5143 if (!cbss) 5144 continue; 5145 5146 link = sdata_dereference(sdata->link[link_id], sdata); 5147 if (WARN_ON(!link)) 5148 goto out_err; 5149 5150 if (ieee80211_vif_is_mld(&sdata->vif)) 5151 link_info(link, 5152 "local address %pM, AP link address %pM%s\n", 5153 link->conf->addr, 5154 assoc_data->link[link_id].bss->bssid, 5155 link_id == assoc_data->assoc_link_id ? 5156 " (assoc)" : ""); 5157 5158 link_sta = rcu_dereference_protected(sta->link[link_id], 5159 lockdep_is_held(&local->hw.wiphy->mtx)); 5160 if (WARN_ON(!link_sta)) 5161 goto out_err; 5162 5163 if (!link->u.mgd.have_beacon) { 5164 const struct cfg80211_bss_ies *ies; 5165 5166 rcu_read_lock(); 5167 ies = rcu_dereference(cbss->beacon_ies); 5168 if (ies) 5169 link->u.mgd.have_beacon = true; 5170 else 5171 ies = rcu_dereference(cbss->ies); 5172 ieee80211_get_dtim(ies, 5173 &link->conf->sync_dtim_count, 5174 &link->u.mgd.dtim_period); 5175 link->conf->beacon_int = cbss->beacon_interval; 5176 rcu_read_unlock(); 5177 } 5178 5179 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5180 5181 if (link_id != assoc_data->assoc_link_id) { 5182 link->u.mgd.conn = assoc_data->link[link_id].conn; 5183 5184 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5185 true, &link->u.mgd.conn); 5186 if (err) { 5187 link_info(link, "prep_channel failed\n"); 5188 goto out_err; 5189 } 5190 } 5191 5192 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5193 assoc_data->link[link_id].bss); 5194 if (err) 5195 goto out_err; 5196 5197 if (!ieee80211_assoc_config_link(link, link_sta, 5198 assoc_data->link[link_id].bss, 5199 mgmt, elem_start, elem_len, 5200 &changed[link_id])) 5201 goto out_err; 5202 5203 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5204 valid_links &= ~BIT(link_id); 5205 ieee80211_sta_remove_link(sta, link_id); 5206 continue; 5207 } 5208 5209 if (link_id != assoc_data->assoc_link_id) { 5210 err = ieee80211_sta_activate_link(sta, link_id); 5211 if (err) 5212 goto out_err; 5213 } 5214 } 5215 5216 /* links might have changed due to rejected ones, set them again */ 5217 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5218 5219 rate_control_rate_init(sta); 5220 5221 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5222 set_sta_flag(sta, WLAN_STA_MFP); 5223 sta->sta.mfp = true; 5224 } else { 5225 sta->sta.mfp = false; 5226 } 5227 5228 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5229 elems->ext_capab_len); 5230 5231 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5232 local->hw.queues >= IEEE80211_NUM_ACS; 5233 5234 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5235 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5236 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5237 if (err) { 5238 sdata_info(sdata, 5239 "failed to move station %pM to desired state\n", 5240 sta->sta.addr); 5241 WARN_ON(__sta_info_destroy(sta)); 5242 goto out_err; 5243 } 5244 5245 if (sdata->wdev.use_4addr) 5246 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5247 5248 ieee80211_set_associated(sdata, assoc_data, changed); 5249 5250 /* 5251 * If we're using 4-addr mode, let the AP know that we're 5252 * doing so, so that it can create the STA VLAN on its side 5253 */ 5254 if (ifmgd->use_4addr) 5255 ieee80211_send_4addr_nullfunc(local, sdata); 5256 5257 /* 5258 * Start timer to probe the connection to the AP now. 5259 * Also start the timer that will detect beacon loss. 5260 */ 5261 ieee80211_sta_reset_beacon_monitor(sdata); 5262 ieee80211_sta_reset_conn_monitor(sdata); 5263 5264 return true; 5265 out_err: 5266 eth_zero_addr(sdata->vif.cfg.ap_addr); 5267 return false; 5268 } 5269 5270 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5271 struct ieee80211_mgmt *mgmt, 5272 size_t len) 5273 { 5274 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5275 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5276 u16 capab_info, status_code, aid; 5277 struct ieee80211_elems_parse_params parse_params = { 5278 .bss = NULL, 5279 .link_id = -1, 5280 .from_ap = true, 5281 }; 5282 struct ieee802_11_elems *elems; 5283 int ac; 5284 const u8 *elem_start; 5285 unsigned int elem_len; 5286 bool reassoc; 5287 struct ieee80211_event event = { 5288 .type = MLME_EVENT, 5289 .u.mlme.data = ASSOC_EVENT, 5290 }; 5291 struct ieee80211_prep_tx_info info = {}; 5292 struct cfg80211_rx_assoc_resp_data resp = { 5293 .uapsd_queues = -1, 5294 }; 5295 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5296 unsigned int link_id; 5297 5298 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5299 5300 if (!assoc_data) 5301 return; 5302 5303 parse_params.mode = 5304 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5305 5306 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5307 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5308 return; 5309 5310 /* 5311 * AssocResp and ReassocResp have identical structure, so process both 5312 * of them in this function. 5313 */ 5314 5315 if (len < 24 + 6) 5316 return; 5317 5318 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5319 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5320 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5321 if (assoc_data->s1g) 5322 elem_start = mgmt->u.s1g_assoc_resp.variable; 5323 else 5324 elem_start = mgmt->u.assoc_resp.variable; 5325 5326 /* 5327 * Note: this may not be perfect, AP might misbehave - if 5328 * anyone needs to rely on perfect complete notification 5329 * with the exact right subtype, then we need to track what 5330 * we actually transmitted. 5331 */ 5332 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5333 IEEE80211_STYPE_ASSOC_REQ; 5334 5335 if (assoc_data->fils_kek_len && 5336 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5337 return; 5338 5339 elem_len = len - (elem_start - (u8 *)mgmt); 5340 parse_params.start = elem_start; 5341 parse_params.len = elem_len; 5342 elems = ieee802_11_parse_elems_full(&parse_params); 5343 if (!elems) 5344 goto notify_driver; 5345 5346 if (elems->aid_resp) 5347 aid = le16_to_cpu(elems->aid_resp->aid); 5348 else if (assoc_data->s1g) 5349 aid = 0; /* TODO */ 5350 else 5351 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5352 5353 /* 5354 * The 5 MSB of the AID field are reserved 5355 * (802.11-2016 9.4.1.8 AID field) 5356 */ 5357 aid &= 0x7ff; 5358 5359 sdata_info(sdata, 5360 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5361 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5362 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5363 5364 ifmgd->broken_ap = false; 5365 5366 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5367 elems->timeout_int && 5368 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5369 u32 tu, ms; 5370 5371 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5372 le32_to_cpu(elems->timeout_int->value)); 5373 5374 tu = le32_to_cpu(elems->timeout_int->value); 5375 ms = tu * 1024 / 1000; 5376 sdata_info(sdata, 5377 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5378 assoc_data->ap_addr, tu, ms); 5379 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5380 assoc_data->timeout_started = true; 5381 assoc_data->comeback = true; 5382 if (ms > IEEE80211_ASSOC_TIMEOUT) 5383 run_again(sdata, assoc_data->timeout); 5384 goto notify_driver; 5385 } 5386 5387 if (status_code != WLAN_STATUS_SUCCESS) { 5388 sdata_info(sdata, "%pM denied association (code=%d)\n", 5389 assoc_data->ap_addr, status_code); 5390 event.u.mlme.status = MLME_DENIED; 5391 event.u.mlme.reason = status_code; 5392 drv_event_callback(sdata->local, sdata, &event); 5393 } else { 5394 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5395 sdata_info(sdata, 5396 "invalid AID value %d (out of range), turn off PS\n", 5397 aid); 5398 aid = 0; 5399 ifmgd->broken_ap = true; 5400 } 5401 5402 if (ieee80211_vif_is_mld(&sdata->vif)) { 5403 struct ieee80211_mle_basic_common_info *common; 5404 5405 if (!elems->ml_basic) { 5406 sdata_info(sdata, 5407 "MLO association with %pM but no (basic) multi-link element in response!\n", 5408 assoc_data->ap_addr); 5409 goto abandon_assoc; 5410 } 5411 5412 common = (void *)elems->ml_basic->variable; 5413 5414 if (memcmp(assoc_data->ap_addr, 5415 common->mld_mac_addr, ETH_ALEN)) { 5416 sdata_info(sdata, 5417 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5418 common->mld_mac_addr, 5419 assoc_data->ap_addr); 5420 goto abandon_assoc; 5421 } 5422 5423 sdata->vif.cfg.eml_cap = 5424 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5425 sdata->vif.cfg.eml_med_sync_delay = 5426 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5427 sdata->vif.cfg.mld_capa_op = 5428 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5429 } 5430 5431 sdata->vif.cfg.aid = aid; 5432 5433 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5434 elem_start, elem_len)) { 5435 /* oops -- internal error -- send timeout for now */ 5436 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5437 goto notify_driver; 5438 } 5439 event.u.mlme.status = MLME_SUCCESS; 5440 drv_event_callback(sdata->local, sdata, &event); 5441 sdata_info(sdata, "associated\n"); 5442 5443 info.success = 1; 5444 } 5445 5446 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5447 struct ieee80211_link_data *link; 5448 5449 if (!assoc_data->link[link_id].bss) 5450 continue; 5451 5452 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5453 ether_addr_copy(resp.links[link_id].addr, 5454 assoc_data->link[link_id].addr); 5455 resp.links[link_id].status = assoc_data->link[link_id].status; 5456 5457 link = sdata_dereference(sdata->link[link_id], sdata); 5458 if (!link) 5459 continue; 5460 5461 /* get uapsd queues configuration - same for all links */ 5462 resp.uapsd_queues = 0; 5463 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5464 if (link->tx_conf[ac].uapsd) 5465 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5466 } 5467 5468 if (ieee80211_vif_is_mld(&sdata->vif)) { 5469 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5470 resp.ap_mld_addr = ap_mld_addr; 5471 } 5472 5473 ieee80211_destroy_assoc_data(sdata, 5474 status_code == WLAN_STATUS_SUCCESS ? 5475 ASSOC_SUCCESS : 5476 ASSOC_REJECTED); 5477 5478 resp.buf = (u8 *)mgmt; 5479 resp.len = len; 5480 resp.req_ies = ifmgd->assoc_req_ies; 5481 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5482 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5483 notify_driver: 5484 drv_mgd_complete_tx(sdata->local, sdata, &info); 5485 kfree(elems); 5486 return; 5487 abandon_assoc: 5488 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5489 goto notify_driver; 5490 } 5491 5492 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5493 struct ieee80211_mgmt *mgmt, size_t len, 5494 struct ieee80211_rx_status *rx_status) 5495 { 5496 struct ieee80211_sub_if_data *sdata = link->sdata; 5497 struct ieee80211_local *local = sdata->local; 5498 struct ieee80211_bss *bss; 5499 struct ieee80211_channel *channel; 5500 5501 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5502 5503 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5504 ieee80211_rx_status_to_khz(rx_status)); 5505 if (!channel) 5506 return; 5507 5508 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5509 if (bss) { 5510 link->conf->beacon_rate = bss->beacon_rate; 5511 ieee80211_rx_bss_put(local, bss); 5512 } 5513 } 5514 5515 5516 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5517 struct sk_buff *skb) 5518 { 5519 struct ieee80211_sub_if_data *sdata = link->sdata; 5520 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5521 struct ieee80211_if_managed *ifmgd; 5522 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5523 struct ieee80211_channel *channel; 5524 size_t baselen, len = skb->len; 5525 5526 ifmgd = &sdata->u.mgd; 5527 5528 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5529 5530 /* 5531 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5532 * "If a 6 GHz AP receives a Probe Request frame and responds with 5533 * a Probe Response frame [..], the Address 1 field of the Probe 5534 * Response frame shall be set to the broadcast address [..]" 5535 * So, on 6GHz band we should also accept broadcast responses. 5536 */ 5537 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5538 rx_status->freq); 5539 if (!channel) 5540 return; 5541 5542 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5543 (channel->band != NL80211_BAND_6GHZ || 5544 !is_broadcast_ether_addr(mgmt->da))) 5545 return; /* ignore ProbeResp to foreign address */ 5546 5547 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5548 if (baselen > len) 5549 return; 5550 5551 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5552 5553 if (ifmgd->associated && 5554 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5555 ieee80211_reset_ap_probe(sdata); 5556 } 5557 5558 /* 5559 * This is the canonical list of information elements we care about, 5560 * the filter code also gives us all changes to the Microsoft OUI 5561 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5562 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5563 * changes to requested client power. 5564 * 5565 * We implement beacon filtering in software since that means we can 5566 * avoid processing the frame here and in cfg80211, and userspace 5567 * will not be able to tell whether the hardware supports it or not. 5568 * 5569 * XXX: This list needs to be dynamic -- userspace needs to be able to 5570 * add items it requires. It also needs to be able to tell us to 5571 * look out for other vendor IEs. 5572 */ 5573 static const u64 care_about_ies = 5574 (1ULL << WLAN_EID_COUNTRY) | 5575 (1ULL << WLAN_EID_ERP_INFO) | 5576 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5577 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5578 (1ULL << WLAN_EID_HT_CAPABILITY) | 5579 (1ULL << WLAN_EID_HT_OPERATION) | 5580 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5581 5582 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5583 struct ieee80211_if_managed *ifmgd, 5584 struct ieee80211_bss_conf *bss_conf, 5585 struct ieee80211_local *local, 5586 struct ieee80211_rx_status *rx_status) 5587 { 5588 struct ieee80211_sub_if_data *sdata = link->sdata; 5589 5590 /* Track average RSSI from the Beacon frames of the current AP */ 5591 5592 if (!link->u.mgd.tracking_signal_avg) { 5593 link->u.mgd.tracking_signal_avg = true; 5594 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5595 link->u.mgd.last_cqm_event_signal = 0; 5596 link->u.mgd.count_beacon_signal = 1; 5597 link->u.mgd.last_ave_beacon_signal = 0; 5598 } else { 5599 link->u.mgd.count_beacon_signal++; 5600 } 5601 5602 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5603 -rx_status->signal); 5604 5605 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5606 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5607 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5608 int last_sig = link->u.mgd.last_ave_beacon_signal; 5609 struct ieee80211_event event = { 5610 .type = RSSI_EVENT, 5611 }; 5612 5613 /* 5614 * if signal crosses either of the boundaries, invoke callback 5615 * with appropriate parameters 5616 */ 5617 if (sig > ifmgd->rssi_max_thold && 5618 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5619 link->u.mgd.last_ave_beacon_signal = sig; 5620 event.u.rssi.data = RSSI_EVENT_HIGH; 5621 drv_event_callback(local, sdata, &event); 5622 } else if (sig < ifmgd->rssi_min_thold && 5623 (last_sig >= ifmgd->rssi_max_thold || 5624 last_sig == 0)) { 5625 link->u.mgd.last_ave_beacon_signal = sig; 5626 event.u.rssi.data = RSSI_EVENT_LOW; 5627 drv_event_callback(local, sdata, &event); 5628 } 5629 } 5630 5631 if (bss_conf->cqm_rssi_thold && 5632 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5633 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5634 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5635 int last_event = link->u.mgd.last_cqm_event_signal; 5636 int thold = bss_conf->cqm_rssi_thold; 5637 int hyst = bss_conf->cqm_rssi_hyst; 5638 5639 if (sig < thold && 5640 (last_event == 0 || sig < last_event - hyst)) { 5641 link->u.mgd.last_cqm_event_signal = sig; 5642 ieee80211_cqm_rssi_notify( 5643 &sdata->vif, 5644 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5645 sig, GFP_KERNEL); 5646 } else if (sig > thold && 5647 (last_event == 0 || sig > last_event + hyst)) { 5648 link->u.mgd.last_cqm_event_signal = sig; 5649 ieee80211_cqm_rssi_notify( 5650 &sdata->vif, 5651 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5652 sig, GFP_KERNEL); 5653 } 5654 } 5655 5656 if (bss_conf->cqm_rssi_low && 5657 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5658 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5659 int last_event = link->u.mgd.last_cqm_event_signal; 5660 int low = bss_conf->cqm_rssi_low; 5661 int high = bss_conf->cqm_rssi_high; 5662 5663 if (sig < low && 5664 (last_event == 0 || last_event >= low)) { 5665 link->u.mgd.last_cqm_event_signal = sig; 5666 ieee80211_cqm_rssi_notify( 5667 &sdata->vif, 5668 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5669 sig, GFP_KERNEL); 5670 } else if (sig > high && 5671 (last_event == 0 || last_event <= high)) { 5672 link->u.mgd.last_cqm_event_signal = sig; 5673 ieee80211_cqm_rssi_notify( 5674 &sdata->vif, 5675 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5676 sig, GFP_KERNEL); 5677 } 5678 } 5679 } 5680 5681 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5682 struct cfg80211_bss *bss) 5683 { 5684 if (ether_addr_equal(tx_bssid, bss->bssid)) 5685 return true; 5686 if (!bss->transmitted_bss) 5687 return false; 5688 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5689 } 5690 5691 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5692 struct wiphy_work *work) 5693 { 5694 struct ieee80211_sub_if_data *sdata = 5695 container_of(work, struct ieee80211_sub_if_data, 5696 u.mgd.ml_reconf_work.work); 5697 u16 new_valid_links, new_active_links, new_dormant_links; 5698 int ret; 5699 5700 if (!sdata->u.mgd.removed_links) 5701 return; 5702 5703 sdata_info(sdata, 5704 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5705 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5706 5707 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5708 if (new_valid_links == sdata->vif.valid_links) 5709 return; 5710 5711 if (!new_valid_links || 5712 !(new_valid_links & ~sdata->vif.dormant_links)) { 5713 sdata_info(sdata, "No valid links after reconfiguration\n"); 5714 ret = -EINVAL; 5715 goto out; 5716 } 5717 5718 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5719 if (new_active_links != sdata->vif.active_links) { 5720 if (!new_active_links) 5721 new_active_links = 5722 BIT(ffs(new_valid_links & 5723 ~sdata->vif.dormant_links) - 1); 5724 5725 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 5726 if (ret) { 5727 sdata_info(sdata, 5728 "Failed setting active links\n"); 5729 goto out; 5730 } 5731 } 5732 5733 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 5734 5735 ret = ieee80211_vif_set_links(sdata, new_valid_links, 5736 new_dormant_links); 5737 if (ret) 5738 sdata_info(sdata, "Failed setting valid links\n"); 5739 5740 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 5741 5742 out: 5743 if (!ret) 5744 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5745 else 5746 __ieee80211_disconnect(sdata); 5747 5748 sdata->u.mgd.removed_links = 0; 5749 } 5750 5751 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5752 struct ieee802_11_elems *elems) 5753 { 5754 const struct ieee80211_multi_link_elem *ml; 5755 const struct element *sub; 5756 ssize_t ml_len; 5757 unsigned long removed_links = 0; 5758 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5759 u8 link_id; 5760 u32 delay; 5761 5762 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5763 return; 5764 5765 ml_len = cfg80211_defragment_element(elems->ml_reconf_elem, 5766 elems->ie_start, 5767 elems->total_len, 5768 elems->scratch_pos, 5769 elems->scratch + elems->scratch_len - 5770 elems->scratch_pos, 5771 WLAN_EID_FRAGMENT); 5772 if (ml_len < 0) 5773 return; 5774 5775 elems->ml_reconf = (const void *)elems->scratch_pos; 5776 elems->ml_reconf_len = ml_len; 5777 ml = elems->ml_reconf; 5778 5779 /* Directly parse the sub elements as the common information doesn't 5780 * hold any useful information. 5781 */ 5782 for_each_mle_subelement(sub, (u8 *)ml, ml_len) { 5783 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 5784 u8 *pos = prof->variable; 5785 u16 control; 5786 5787 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 5788 continue; 5789 5790 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 5791 sub->datalen)) 5792 return; 5793 5794 control = le16_to_cpu(prof->control); 5795 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 5796 5797 removed_links |= BIT(link_id); 5798 5799 /* the MAC address should not be included, but handle it */ 5800 if (control & 5801 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 5802 pos += 6; 5803 5804 /* According to Draft P802.11be_D3.0, the control should 5805 * include the AP Removal Timer present. If the AP Removal Timer 5806 * is not present assume immediate removal. 5807 */ 5808 if (control & 5809 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 5810 link_removal_timeout[link_id] = le16_to_cpu(*(__le16 *)pos); 5811 } 5812 5813 removed_links &= sdata->vif.valid_links; 5814 if (!removed_links) { 5815 /* In case the removal was cancelled, abort it */ 5816 if (sdata->u.mgd.removed_links) { 5817 sdata->u.mgd.removed_links = 0; 5818 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5819 &sdata->u.mgd.ml_reconf_work); 5820 } 5821 return; 5822 } 5823 5824 delay = 0; 5825 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 5826 struct ieee80211_bss_conf *link_conf = 5827 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 5828 u32 link_delay; 5829 5830 if (!link_conf) { 5831 removed_links &= ~BIT(link_id); 5832 continue; 5833 } 5834 5835 link_delay = link_conf->beacon_int * 5836 link_removal_timeout[link_id]; 5837 5838 if (!delay) 5839 delay = link_delay; 5840 else 5841 delay = min(delay, link_delay); 5842 } 5843 5844 sdata->u.mgd.removed_links = removed_links; 5845 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 5846 &sdata->u.mgd.ml_reconf_work, 5847 TU_TO_JIFFIES(delay)); 5848 } 5849 5850 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 5851 u16 active_links, u16 dormant_links, 5852 u16 suspended_links) 5853 { 5854 u64 changed = 0; 5855 int ret; 5856 5857 if (!active_links) { 5858 ret = -EINVAL; 5859 goto out; 5860 } 5861 5862 /* If there is an active negotiated TTLM, it should be discarded by 5863 * the new negotiated/advertised TTLM. 5864 */ 5865 if (sdata->vif.neg_ttlm.valid) { 5866 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 5867 sdata->vif.suspended_links = 0; 5868 changed = BSS_CHANGED_MLD_TTLM; 5869 } 5870 5871 if (sdata->vif.active_links != active_links) { 5872 ret = ieee80211_set_active_links(&sdata->vif, active_links); 5873 if (ret) { 5874 sdata_info(sdata, "Failed to set TTLM active links\n"); 5875 goto out; 5876 } 5877 } 5878 5879 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 5880 dormant_links); 5881 if (ret) { 5882 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 5883 goto out; 5884 } 5885 5886 changed |= BSS_CHANGED_MLD_VALID_LINKS; 5887 sdata->vif.suspended_links = suspended_links; 5888 if (sdata->vif.suspended_links) 5889 changed |= BSS_CHANGED_MLD_TTLM; 5890 5891 ieee80211_vif_cfg_change_notify(sdata, changed); 5892 5893 out: 5894 if (ret) 5895 ieee80211_disconnect(&sdata->vif, false); 5896 5897 return ret; 5898 } 5899 5900 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 5901 struct wiphy_work *work) 5902 { 5903 u16 new_active_links, new_dormant_links; 5904 struct ieee80211_sub_if_data *sdata = 5905 container_of(work, struct ieee80211_sub_if_data, 5906 u.mgd.ttlm_work.work); 5907 5908 new_active_links = sdata->u.mgd.ttlm_info.map & 5909 sdata->vif.valid_links; 5910 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 5911 sdata->vif.valid_links; 5912 5913 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 5914 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 5915 0)) 5916 return; 5917 5918 sdata->u.mgd.ttlm_info.active = true; 5919 sdata->u.mgd.ttlm_info.switch_time = 0; 5920 } 5921 5922 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 5923 { 5924 if (bm_size == 1) 5925 return *data; 5926 else 5927 return get_unaligned_le16(data); 5928 } 5929 5930 static int 5931 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 5932 const struct ieee80211_ttlm_elem *ttlm, 5933 struct ieee80211_adv_ttlm_info *ttlm_info) 5934 { 5935 /* The element size was already validated in 5936 * ieee80211_tid_to_link_map_size_ok() 5937 */ 5938 u8 control, link_map_presence, map_size, tid; 5939 u8 *pos; 5940 5941 memset(ttlm_info, 0, sizeof(*ttlm_info)); 5942 pos = (void *)ttlm->optional; 5943 control = ttlm->control; 5944 5945 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 5946 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 5947 return 0; 5948 5949 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 5950 IEEE80211_TTLM_DIRECTION_BOTH) { 5951 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 5952 return -EINVAL; 5953 } 5954 5955 link_map_presence = *pos; 5956 pos++; 5957 5958 ttlm_info->switch_time = get_unaligned_le16(pos); 5959 5960 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 5961 * by 1. 5962 */ 5963 if (!ttlm_info->switch_time) 5964 ttlm_info->switch_time = 1; 5965 5966 pos += 2; 5967 5968 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 5969 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 5970 pos += 3; 5971 } 5972 5973 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 5974 map_size = 1; 5975 else 5976 map_size = 2; 5977 5978 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 5979 * not advertise a TID-to-link mapping that does not map all TIDs to the 5980 * same link set, reject frame if not all links have mapping 5981 */ 5982 if (link_map_presence != 0xff) { 5983 sdata_info(sdata, 5984 "Invalid advertised T2L mapping presence indicator\n"); 5985 return -EINVAL; 5986 } 5987 5988 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 5989 if (!ttlm_info->map) { 5990 sdata_info(sdata, 5991 "Invalid advertised T2L map for TID 0\n"); 5992 return -EINVAL; 5993 } 5994 5995 pos += map_size; 5996 5997 for (tid = 1; tid < 8; tid++) { 5998 u16 map = ieee80211_get_ttlm(map_size, pos); 5999 6000 if (map != ttlm_info->map) { 6001 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6002 tid); 6003 return -EINVAL; 6004 } 6005 6006 pos += map_size; 6007 } 6008 return 0; 6009 } 6010 6011 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6012 struct ieee802_11_elems *elems, 6013 u64 beacon_ts) 6014 { 6015 u8 i; 6016 int ret; 6017 6018 if (!ieee80211_vif_is_mld(&sdata->vif)) 6019 return; 6020 6021 if (!elems->ttlm_num) { 6022 if (sdata->u.mgd.ttlm_info.switch_time) { 6023 /* if a planned TID-to-link mapping was cancelled - 6024 * abort it 6025 */ 6026 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6027 &sdata->u.mgd.ttlm_work); 6028 } else if (sdata->u.mgd.ttlm_info.active) { 6029 /* if no TID-to-link element, set to default mapping in 6030 * which all TIDs are mapped to all setup links 6031 */ 6032 ret = ieee80211_vif_set_links(sdata, 6033 sdata->vif.valid_links, 6034 0); 6035 if (ret) { 6036 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6037 return; 6038 } 6039 ieee80211_vif_cfg_change_notify(sdata, 6040 BSS_CHANGED_MLD_VALID_LINKS); 6041 } 6042 memset(&sdata->u.mgd.ttlm_info, 0, 6043 sizeof(sdata->u.mgd.ttlm_info)); 6044 return; 6045 } 6046 6047 for (i = 0; i < elems->ttlm_num; i++) { 6048 struct ieee80211_adv_ttlm_info ttlm_info; 6049 u32 res; 6050 6051 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6052 &ttlm_info); 6053 6054 if (res) { 6055 __ieee80211_disconnect(sdata); 6056 return; 6057 } 6058 6059 if (ttlm_info.switch_time) { 6060 u16 beacon_ts_tu, st_tu, delay; 6061 u32 delay_jiffies; 6062 u64 mask; 6063 6064 /* The t2l map switch time is indicated with a partial 6065 * TSF value (bits 10 to 25), get the partial beacon TS 6066 * as well, and calc the delay to the start time. 6067 */ 6068 mask = GENMASK_ULL(25, 10); 6069 beacon_ts_tu = (beacon_ts & mask) >> 10; 6070 st_tu = ttlm_info.switch_time; 6071 delay = st_tu - beacon_ts_tu; 6072 6073 /* 6074 * If the switch time is far in the future, then it 6075 * could also be the previous switch still being 6076 * announced. 6077 * We can simply ignore it for now, if it is a future 6078 * switch the AP will continue to announce it anyway. 6079 */ 6080 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6081 return; 6082 6083 delay_jiffies = TU_TO_JIFFIES(delay); 6084 6085 /* Link switching can take time, so schedule it 6086 * 100ms before to be ready on time 6087 */ 6088 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6089 delay_jiffies -= 6090 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6091 else 6092 delay_jiffies = 0; 6093 6094 sdata->u.mgd.ttlm_info = ttlm_info; 6095 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6096 &sdata->u.mgd.ttlm_work); 6097 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6098 &sdata->u.mgd.ttlm_work, 6099 delay_jiffies); 6100 return; 6101 } 6102 } 6103 } 6104 6105 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6106 struct ieee80211_hdr *hdr, size_t len, 6107 struct ieee80211_rx_status *rx_status) 6108 { 6109 struct ieee80211_sub_if_data *sdata = link->sdata; 6110 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6111 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6112 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6113 struct ieee80211_mgmt *mgmt = (void *) hdr; 6114 size_t baselen; 6115 struct ieee802_11_elems *elems; 6116 struct ieee80211_local *local = sdata->local; 6117 struct ieee80211_chanctx_conf *chanctx_conf; 6118 struct ieee80211_supported_band *sband; 6119 struct ieee80211_channel *chan; 6120 struct link_sta_info *link_sta; 6121 struct sta_info *sta; 6122 u64 changed = 0; 6123 bool erp_valid; 6124 u8 erp_value = 0; 6125 u32 ncrc = 0; 6126 u8 *bssid, *variable = mgmt->u.beacon.variable; 6127 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6128 struct ieee80211_elems_parse_params parse_params = { 6129 .mode = link->u.mgd.conn.mode, 6130 .link_id = -1, 6131 .from_ap = true, 6132 }; 6133 6134 lockdep_assert_wiphy(local->hw.wiphy); 6135 6136 /* Process beacon from the current BSS */ 6137 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6138 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6139 struct ieee80211_ext *ext = (void *) mgmt; 6140 6141 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6142 variable = ext->u.s1g_short_beacon.variable; 6143 else 6144 variable = ext->u.s1g_beacon.variable; 6145 } 6146 6147 baselen = (u8 *) variable - (u8 *) mgmt; 6148 if (baselen > len) 6149 return; 6150 6151 parse_params.start = variable; 6152 parse_params.len = len - baselen; 6153 6154 rcu_read_lock(); 6155 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6156 if (!chanctx_conf) { 6157 rcu_read_unlock(); 6158 return; 6159 } 6160 6161 if (ieee80211_rx_status_to_khz(rx_status) != 6162 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6163 rcu_read_unlock(); 6164 return; 6165 } 6166 chan = chanctx_conf->def.chan; 6167 rcu_read_unlock(); 6168 6169 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6170 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6171 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6172 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6173 elems = ieee802_11_parse_elems_full(&parse_params); 6174 if (!elems) 6175 return; 6176 6177 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6178 6179 if (elems->dtim_period) 6180 link->u.mgd.dtim_period = elems->dtim_period; 6181 link->u.mgd.have_beacon = true; 6182 ifmgd->assoc_data->need_beacon = false; 6183 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 6184 link->conf->sync_tsf = 6185 le64_to_cpu(mgmt->u.beacon.timestamp); 6186 link->conf->sync_device_ts = 6187 rx_status->device_timestamp; 6188 link->conf->sync_dtim_count = elems->dtim_count; 6189 } 6190 6191 if (elems->mbssid_config_ie) 6192 bss_conf->profile_periodicity = 6193 elems->mbssid_config_ie->profile_periodicity; 6194 else 6195 bss_conf->profile_periodicity = 0; 6196 6197 if (elems->ext_capab_len >= 11 && 6198 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6199 bss_conf->ema_ap = true; 6200 else 6201 bss_conf->ema_ap = false; 6202 6203 /* continue assoc process */ 6204 ifmgd->assoc_data->timeout = jiffies; 6205 ifmgd->assoc_data->timeout_started = true; 6206 run_again(sdata, ifmgd->assoc_data->timeout); 6207 kfree(elems); 6208 return; 6209 } 6210 6211 if (!ifmgd->associated || 6212 !ieee80211_rx_our_beacon(bssid, link->conf->bss)) 6213 return; 6214 bssid = link->u.mgd.bssid; 6215 6216 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6217 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6218 local, rx_status); 6219 6220 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6221 mlme_dbg_ratelimited(sdata, 6222 "cancelling AP probe due to a received beacon\n"); 6223 ieee80211_reset_ap_probe(sdata); 6224 } 6225 6226 /* 6227 * Push the beacon loss detection into the future since 6228 * we are processing a beacon from the AP just now. 6229 */ 6230 ieee80211_sta_reset_beacon_monitor(sdata); 6231 6232 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6233 * element (which carries the beacon interval). Don't forget to add a 6234 * bit to care_about_ies[] above if mac80211 is interested in a 6235 * changing S1G element. 6236 */ 6237 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6238 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6239 parse_params.bss = link->conf->bss; 6240 parse_params.filter = care_about_ies; 6241 parse_params.crc = ncrc; 6242 elems = ieee802_11_parse_elems_full(&parse_params); 6243 if (!elems) 6244 return; 6245 ncrc = elems->crc; 6246 6247 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6248 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6249 if (local->hw.conf.dynamic_ps_timeout > 0) { 6250 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6251 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6252 ieee80211_hw_config(local, 6253 IEEE80211_CONF_CHANGE_PS); 6254 } 6255 ieee80211_send_nullfunc(local, sdata, false); 6256 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6257 local->pspolling = true; 6258 6259 /* 6260 * Here is assumed that the driver will be 6261 * able to send ps-poll frame and receive a 6262 * response even though power save mode is 6263 * enabled, but some drivers might require 6264 * to disable power save here. This needs 6265 * to be investigated. 6266 */ 6267 ieee80211_send_pspoll(local, sdata); 6268 } 6269 } 6270 6271 if (sdata->vif.p2p || 6272 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6273 struct ieee80211_p2p_noa_attr noa = {}; 6274 int ret; 6275 6276 ret = cfg80211_get_p2p_attr(variable, 6277 len - baselen, 6278 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6279 (u8 *) &noa, sizeof(noa)); 6280 if (ret >= 2) { 6281 if (link->u.mgd.p2p_noa_index != noa.index) { 6282 /* valid noa_attr and index changed */ 6283 link->u.mgd.p2p_noa_index = noa.index; 6284 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6285 changed |= BSS_CHANGED_P2P_PS; 6286 /* 6287 * make sure we update all information, the CRC 6288 * mechanism doesn't look at P2P attributes. 6289 */ 6290 link->u.mgd.beacon_crc_valid = false; 6291 } 6292 } else if (link->u.mgd.p2p_noa_index != -1) { 6293 /* noa_attr not found and we had valid noa_attr before */ 6294 link->u.mgd.p2p_noa_index = -1; 6295 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6296 changed |= BSS_CHANGED_P2P_PS; 6297 link->u.mgd.beacon_crc_valid = false; 6298 } 6299 } 6300 6301 if (link->u.mgd.csa_waiting_bcn) 6302 ieee80211_chswitch_post_beacon(link); 6303 6304 /* 6305 * Update beacon timing and dtim count on every beacon appearance. This 6306 * will allow the driver to use the most updated values. Do it before 6307 * comparing this one with last received beacon. 6308 * IMPORTANT: These parameters would possibly be out of sync by the time 6309 * the driver will use them. The synchronized view is currently 6310 * guaranteed only in certain callbacks. 6311 */ 6312 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6313 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6314 link->conf->sync_tsf = 6315 le64_to_cpu(mgmt->u.beacon.timestamp); 6316 link->conf->sync_device_ts = 6317 rx_status->device_timestamp; 6318 link->conf->sync_dtim_count = elems->dtim_count; 6319 } 6320 6321 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6322 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6323 goto free; 6324 link->u.mgd.beacon_crc = ncrc; 6325 link->u.mgd.beacon_crc_valid = true; 6326 6327 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6328 6329 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6330 rx_status->device_timestamp, 6331 elems, true); 6332 6333 if (!link->u.mgd.disable_wmm_tracking && 6334 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6335 elems->wmm_param_len, 6336 elems->mu_edca_param_set)) 6337 changed |= BSS_CHANGED_QOS; 6338 6339 /* 6340 * If we haven't had a beacon before, tell the driver about the 6341 * DTIM period (and beacon timing if desired) now. 6342 */ 6343 if (!link->u.mgd.have_beacon) { 6344 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6345 bss_conf->dtim_period = elems->dtim_period ?: 1; 6346 6347 changed |= BSS_CHANGED_BEACON_INFO; 6348 link->u.mgd.have_beacon = true; 6349 6350 ieee80211_recalc_ps(local); 6351 6352 ieee80211_recalc_ps_vif(sdata); 6353 } 6354 6355 if (elems->erp_info) { 6356 erp_valid = true; 6357 erp_value = elems->erp_info[0]; 6358 } else { 6359 erp_valid = false; 6360 } 6361 6362 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6363 changed |= ieee80211_handle_bss_capability(link, 6364 le16_to_cpu(mgmt->u.beacon.capab_info), 6365 erp_valid, erp_value); 6366 6367 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6368 if (WARN_ON(!sta)) { 6369 goto free; 6370 } 6371 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6372 lockdep_is_held(&local->hw.wiphy->mtx)); 6373 if (WARN_ON(!link_sta)) { 6374 goto free; 6375 } 6376 6377 if (WARN_ON(!link->conf->chanreq.oper.chan)) 6378 goto free; 6379 6380 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 6381 6382 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6383 6384 if (ieee80211_config_bw(link, elems, true, &changed)) { 6385 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6386 WLAN_REASON_DEAUTH_LEAVING, 6387 true, deauth_buf); 6388 ieee80211_report_disconnect(sdata, deauth_buf, 6389 sizeof(deauth_buf), true, 6390 WLAN_REASON_DEAUTH_LEAVING, 6391 false); 6392 goto free; 6393 } 6394 6395 if (elems->opmode_notif) 6396 ieee80211_vht_handle_opmode(sdata, link_sta, 6397 *elems->opmode_notif, 6398 rx_status->band); 6399 6400 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6401 elems->country_elem, 6402 elems->country_elem_len, 6403 elems->pwr_constr_elem, 6404 elems->cisco_dtpc_elem); 6405 6406 ieee80211_ml_reconfiguration(sdata, elems); 6407 ieee80211_process_adv_ttlm(sdata, elems, 6408 le64_to_cpu(mgmt->u.beacon.timestamp)); 6409 6410 ieee80211_link_info_change_notify(sdata, link, changed); 6411 free: 6412 kfree(elems); 6413 } 6414 6415 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6416 struct ieee80211_neg_ttlm neg_ttlm) 6417 { 6418 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 6419 u8 i; 6420 6421 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 6422 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 6423 6424 /* If there is an active TTLM, unset previously suspended links */ 6425 if (sdata->vif.neg_ttlm.valid) 6426 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 6427 6428 /* exclude links that are already disabled by advertised TTLM */ 6429 new_active_links = 6430 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 6431 new_suspended_links = 6432 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 6433 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 6434 if (ieee80211_ttlm_set_links(sdata, new_active_links, 6435 new_dormant_links, new_suspended_links)) 6436 return; 6437 6438 sdata->vif.neg_ttlm = neg_ttlm; 6439 sdata->vif.neg_ttlm.valid = true; 6440 } 6441 6442 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 6443 struct wiphy_work *work) 6444 { 6445 struct ieee80211_sub_if_data *sdata = 6446 container_of(work, struct ieee80211_sub_if_data, 6447 u.mgd.neg_ttlm_timeout_work.work); 6448 6449 sdata_info(sdata, 6450 "No negotiated TTLM response from AP, disconnecting.\n"); 6451 6452 __ieee80211_disconnect(sdata); 6453 } 6454 6455 static void 6456 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 6457 struct ieee80211_neg_ttlm *neg_ttlm) 6458 { 6459 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 6460 6461 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 6462 sizeof(neg_ttlm->downlink))) { 6463 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 6464 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 6465 } else { 6466 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 6467 } 6468 6469 for (i = 0; i < ARRAY_SIZE(direction); i++) { 6470 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 6471 __le16 map; 6472 6473 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 6474 6475 pos = skb_put(skb, len + 2); 6476 *pos++ = WLAN_EID_EXTENSION; 6477 len_pos = pos++; 6478 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 6479 *pos++ = direction[i]; 6480 map_ind_pos = pos++; 6481 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6482 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 6483 cpu_to_le16(neg_ttlm->uplink[tid]) : 6484 cpu_to_le16(neg_ttlm->downlink[tid]); 6485 if (!map) 6486 continue; 6487 6488 len += 2; 6489 map_ind |= BIT(tid); 6490 skb_put_data(skb, &map, sizeof(map)); 6491 } 6492 6493 *map_ind_pos = map_ind; 6494 *len_pos = len; 6495 6496 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 6497 break; 6498 } 6499 } 6500 6501 static void 6502 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6503 struct ieee80211_neg_ttlm *neg_ttlm, 6504 u8 dialog_token) 6505 { 6506 struct ieee80211_local *local = sdata->local; 6507 struct ieee80211_mgmt *mgmt; 6508 struct sk_buff *skb; 6509 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 6510 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6511 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6512 6513 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6514 if (!skb) 6515 return; 6516 6517 skb_reserve(skb, local->tx_headroom); 6518 mgmt = skb_put_zero(skb, hdr_len); 6519 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6520 IEEE80211_STYPE_ACTION); 6521 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6522 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6523 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6524 6525 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6526 mgmt->u.action.u.ttlm_req.action_code = 6527 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 6528 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 6529 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6530 ieee80211_tx_skb(sdata, skb); 6531 } 6532 6533 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6534 struct cfg80211_ttlm_params *params) 6535 { 6536 struct ieee80211_neg_ttlm neg_ttlm = {}; 6537 u8 i; 6538 6539 if (!ieee80211_vif_is_mld(&sdata->vif) || 6540 !(sdata->vif.cfg.mld_capa_op & 6541 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 6542 return -EINVAL; 6543 6544 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6545 if ((params->dlink[i] & ~sdata->vif.valid_links) || 6546 (params->ulink[i] & ~sdata->vif.valid_links)) 6547 return -EINVAL; 6548 6549 neg_ttlm.downlink[i] = params->dlink[i]; 6550 neg_ttlm.uplink[i] = params->ulink[i]; 6551 } 6552 6553 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 6554 NEG_TTLM_RES_ACCEPT) 6555 return -EINVAL; 6556 6557 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6558 sdata->u.mgd.dialog_token_alloc++; 6559 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 6560 sdata->u.mgd.dialog_token_alloc); 6561 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6562 &sdata->u.mgd.neg_ttlm_timeout_work); 6563 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6564 &sdata->u.mgd.neg_ttlm_timeout_work, 6565 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 6566 return 0; 6567 } 6568 6569 static void 6570 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6571 enum ieee80211_neg_ttlm_res ttlm_res, 6572 u8 dialog_token, 6573 struct ieee80211_neg_ttlm *neg_ttlm) 6574 { 6575 struct ieee80211_local *local = sdata->local; 6576 struct ieee80211_mgmt *mgmt; 6577 struct sk_buff *skb; 6578 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 6579 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6580 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6581 6582 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6583 if (!skb) 6584 return; 6585 6586 skb_reserve(skb, local->tx_headroom); 6587 mgmt = skb_put_zero(skb, hdr_len); 6588 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6589 IEEE80211_STYPE_ACTION); 6590 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6591 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6592 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6593 6594 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6595 mgmt->u.action.u.ttlm_res.action_code = 6596 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 6597 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 6598 switch (ttlm_res) { 6599 default: 6600 WARN_ON(1); 6601 fallthrough; 6602 case NEG_TTLM_RES_REJECT: 6603 mgmt->u.action.u.ttlm_res.status_code = 6604 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 6605 break; 6606 case NEG_TTLM_RES_ACCEPT: 6607 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 6608 break; 6609 case NEG_TTLM_RES_SUGGEST_PREFERRED: 6610 mgmt->u.action.u.ttlm_res.status_code = 6611 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 6612 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6613 break; 6614 } 6615 6616 ieee80211_tx_skb(sdata, skb); 6617 } 6618 6619 static int 6620 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6621 const struct ieee80211_ttlm_elem *ttlm, 6622 struct ieee80211_neg_ttlm *neg_ttlm, 6623 u8 *direction) 6624 { 6625 u8 control, link_map_presence, map_size, tid; 6626 u8 *pos; 6627 6628 /* The element size was already validated in 6629 * ieee80211_tid_to_link_map_size_ok() 6630 */ 6631 pos = (void *)ttlm->optional; 6632 6633 control = ttlm->control; 6634 6635 /* mapping switch time and expected duration fields are not expected 6636 * in case of negotiated TTLM 6637 */ 6638 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 6639 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 6640 mlme_dbg(sdata, 6641 "Invalid TTLM element in negotiated TTLM request\n"); 6642 return -EINVAL; 6643 } 6644 6645 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6646 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6647 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 6648 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 6649 } 6650 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 6651 return 0; 6652 } 6653 6654 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 6655 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 6656 *direction != IEEE80211_TTLM_DIRECTION_UP && 6657 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 6658 return -EINVAL; 6659 6660 link_map_presence = *pos; 6661 pos++; 6662 6663 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6664 map_size = 1; 6665 else 6666 map_size = 2; 6667 6668 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6669 u16 map; 6670 6671 if (link_map_presence & BIT(tid)) { 6672 map = ieee80211_get_ttlm(map_size, pos); 6673 if (!map) { 6674 mlme_dbg(sdata, 6675 "No active links for TID %d", tid); 6676 return -EINVAL; 6677 } 6678 } else { 6679 map = 0; 6680 } 6681 6682 switch (*direction) { 6683 case IEEE80211_TTLM_DIRECTION_BOTH: 6684 neg_ttlm->downlink[tid] = map; 6685 neg_ttlm->uplink[tid] = map; 6686 break; 6687 case IEEE80211_TTLM_DIRECTION_DOWN: 6688 neg_ttlm->downlink[tid] = map; 6689 break; 6690 case IEEE80211_TTLM_DIRECTION_UP: 6691 neg_ttlm->uplink[tid] = map; 6692 break; 6693 default: 6694 return -EINVAL; 6695 } 6696 pos += map_size; 6697 } 6698 return 0; 6699 } 6700 6701 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6702 struct ieee80211_mgmt *mgmt, size_t len) 6703 { 6704 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 6705 size_t ies_len; 6706 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 6707 struct ieee802_11_elems *elems = NULL; 6708 struct ieee80211_neg_ttlm neg_ttlm = {}; 6709 6710 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 6711 6712 if (!ieee80211_vif_is_mld(&sdata->vif)) 6713 return; 6714 6715 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 6716 ies_len = len - offsetof(struct ieee80211_mgmt, 6717 u.action.u.ttlm_req.variable); 6718 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 6719 ies_len, true, NULL); 6720 if (!elems) { 6721 ttlm_res = NEG_TTLM_RES_REJECT; 6722 goto out; 6723 } 6724 6725 for (i = 0; i < elems->ttlm_num; i++) { 6726 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 6727 &neg_ttlm, &direction[i]) || 6728 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 6729 elems->ttlm_num != 1)) { 6730 ttlm_res = NEG_TTLM_RES_REJECT; 6731 goto out; 6732 } 6733 } 6734 6735 if (!elems->ttlm_num || 6736 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 6737 ttlm_res = NEG_TTLM_RES_REJECT; 6738 goto out; 6739 } 6740 6741 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6742 if ((neg_ttlm.downlink[i] && 6743 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 6744 (neg_ttlm.uplink[i] && 6745 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 6746 ttlm_res = NEG_TTLM_RES_REJECT; 6747 goto out; 6748 } 6749 } 6750 6751 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 6752 6753 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 6754 goto out; 6755 6756 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6757 out: 6758 kfree(elems); 6759 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 6760 } 6761 6762 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6763 struct ieee80211_mgmt *mgmt, size_t len) 6764 { 6765 if (!ieee80211_vif_is_mld(&sdata->vif) || 6766 mgmt->u.action.u.ttlm_req.dialog_token != 6767 sdata->u.mgd.dialog_token_alloc) 6768 return; 6769 6770 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6771 &sdata->u.mgd.neg_ttlm_timeout_work); 6772 6773 /* MLD station sends a TID to link mapping request, mainly to handle 6774 * BTM (BSS transition management) request, in which case it needs to 6775 * restrict the active links set. 6776 * In this case it's not expected that the MLD AP will reject the 6777 * negotiated TTLM request. 6778 * This can be better implemented in the future, to handle request 6779 * rejections. 6780 */ 6781 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 6782 __ieee80211_disconnect(sdata); 6783 } 6784 6785 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 6786 struct sk_buff *skb) 6787 { 6788 struct ieee80211_link_data *link = &sdata->deflink; 6789 struct ieee80211_rx_status *rx_status; 6790 struct ieee80211_hdr *hdr; 6791 u16 fc; 6792 6793 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6794 6795 rx_status = (struct ieee80211_rx_status *) skb->cb; 6796 hdr = (struct ieee80211_hdr *) skb->data; 6797 fc = le16_to_cpu(hdr->frame_control); 6798 6799 switch (fc & IEEE80211_FCTL_STYPE) { 6800 case IEEE80211_STYPE_S1G_BEACON: 6801 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 6802 break; 6803 } 6804 } 6805 6806 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 6807 struct sk_buff *skb) 6808 { 6809 struct ieee80211_link_data *link = &sdata->deflink; 6810 struct ieee80211_rx_status *rx_status; 6811 struct ieee80211_mgmt *mgmt; 6812 u16 fc; 6813 int ies_len; 6814 6815 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6816 6817 rx_status = (struct ieee80211_rx_status *) skb->cb; 6818 mgmt = (struct ieee80211_mgmt *) skb->data; 6819 fc = le16_to_cpu(mgmt->frame_control); 6820 6821 if (rx_status->link_valid) { 6822 link = sdata_dereference(sdata->link[rx_status->link_id], 6823 sdata); 6824 if (!link) 6825 return; 6826 } 6827 6828 switch (fc & IEEE80211_FCTL_STYPE) { 6829 case IEEE80211_STYPE_BEACON: 6830 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 6831 skb->len, rx_status); 6832 break; 6833 case IEEE80211_STYPE_PROBE_RESP: 6834 ieee80211_rx_mgmt_probe_resp(link, skb); 6835 break; 6836 case IEEE80211_STYPE_AUTH: 6837 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 6838 break; 6839 case IEEE80211_STYPE_DEAUTH: 6840 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6841 break; 6842 case IEEE80211_STYPE_DISASSOC: 6843 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6844 break; 6845 case IEEE80211_STYPE_ASSOC_RESP: 6846 case IEEE80211_STYPE_REASSOC_RESP: 6847 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6848 break; 6849 case IEEE80211_STYPE_ACTION: 6850 if (!sdata->u.mgd.associated || 6851 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 6852 break; 6853 6854 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6855 struct ieee802_11_elems *elems; 6856 6857 ies_len = skb->len - 6858 offsetof(struct ieee80211_mgmt, 6859 u.action.u.chan_switch.variable); 6860 6861 if (ies_len < 0) 6862 break; 6863 6864 /* CSA IE cannot be overridden, no need for BSSID */ 6865 elems = ieee802_11_parse_elems( 6866 mgmt->u.action.u.chan_switch.variable, 6867 ies_len, true, NULL); 6868 6869 if (elems && !elems->parse_error) 6870 ieee80211_sta_process_chanswitch(link, 6871 rx_status->mactime, 6872 rx_status->device_timestamp, 6873 elems, false); 6874 kfree(elems); 6875 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6876 struct ieee802_11_elems *elems; 6877 6878 ies_len = skb->len - 6879 offsetof(struct ieee80211_mgmt, 6880 u.action.u.ext_chan_switch.variable); 6881 6882 if (ies_len < 0) 6883 break; 6884 6885 /* 6886 * extended CSA IE can't be overridden, no need for 6887 * BSSID 6888 */ 6889 elems = ieee802_11_parse_elems( 6890 mgmt->u.action.u.ext_chan_switch.variable, 6891 ies_len, true, NULL); 6892 6893 if (elems && !elems->parse_error) { 6894 /* for the handling code pretend it was an IE */ 6895 elems->ext_chansw_ie = 6896 &mgmt->u.action.u.ext_chan_switch.data; 6897 6898 ieee80211_sta_process_chanswitch(link, 6899 rx_status->mactime, 6900 rx_status->device_timestamp, 6901 elems, false); 6902 } 6903 6904 kfree(elems); 6905 } 6906 break; 6907 } 6908 } 6909 6910 static void ieee80211_sta_timer(struct timer_list *t) 6911 { 6912 struct ieee80211_sub_if_data *sdata = 6913 from_timer(sdata, t, u.mgd.timer); 6914 6915 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 6916 } 6917 6918 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 6919 u8 reason, bool tx) 6920 { 6921 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6922 6923 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 6924 tx, frame_buf); 6925 6926 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 6927 reason, false); 6928 } 6929 6930 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 6931 { 6932 struct ieee80211_local *local = sdata->local; 6933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6934 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 6935 u32 tx_flags = 0; 6936 u16 trans = 1; 6937 u16 status = 0; 6938 struct ieee80211_prep_tx_info info = { 6939 .subtype = IEEE80211_STYPE_AUTH, 6940 }; 6941 6942 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6943 6944 if (WARN_ON_ONCE(!auth_data)) 6945 return -EINVAL; 6946 6947 auth_data->tries++; 6948 6949 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 6950 sdata_info(sdata, "authentication with %pM timed out\n", 6951 auth_data->ap_addr); 6952 6953 /* 6954 * Most likely AP is not in the range so remove the 6955 * bss struct for that AP. 6956 */ 6957 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 6958 6959 return -ETIMEDOUT; 6960 } 6961 6962 if (auth_data->algorithm == WLAN_AUTH_SAE) 6963 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 6964 6965 info.link_id = auth_data->link_id; 6966 drv_mgd_prepare_tx(local, sdata, &info); 6967 6968 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 6969 auth_data->ap_addr, auth_data->tries, 6970 IEEE80211_AUTH_MAX_TRIES); 6971 6972 auth_data->expected_transaction = 2; 6973 6974 if (auth_data->algorithm == WLAN_AUTH_SAE) { 6975 trans = auth_data->sae_trans; 6976 status = auth_data->sae_status; 6977 auth_data->expected_transaction = trans; 6978 } 6979 6980 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 6981 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 6982 IEEE80211_TX_INTFL_MLME_CONN_TX; 6983 6984 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 6985 auth_data->data, auth_data->data_len, 6986 auth_data->ap_addr, auth_data->ap_addr, 6987 NULL, 0, 0, tx_flags); 6988 6989 if (tx_flags == 0) { 6990 if (auth_data->algorithm == WLAN_AUTH_SAE) 6991 auth_data->timeout = jiffies + 6992 IEEE80211_AUTH_TIMEOUT_SAE; 6993 else 6994 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 6995 } else { 6996 auth_data->timeout = 6997 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 6998 } 6999 7000 auth_data->timeout_started = true; 7001 run_again(sdata, auth_data->timeout); 7002 7003 return 0; 7004 } 7005 7006 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7007 { 7008 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7009 struct ieee80211_local *local = sdata->local; 7010 int ret; 7011 7012 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7013 7014 assoc_data->tries++; 7015 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7016 sdata_info(sdata, "association with %pM timed out\n", 7017 assoc_data->ap_addr); 7018 7019 /* 7020 * Most likely AP is not in the range so remove the 7021 * bss struct for that AP. 7022 */ 7023 cfg80211_unlink_bss(local->hw.wiphy, 7024 assoc_data->link[assoc_data->assoc_link_id].bss); 7025 7026 return -ETIMEDOUT; 7027 } 7028 7029 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7030 assoc_data->ap_addr, assoc_data->tries, 7031 IEEE80211_ASSOC_MAX_TRIES); 7032 ret = ieee80211_send_assoc(sdata); 7033 if (ret) 7034 return ret; 7035 7036 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7037 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7038 assoc_data->timeout_started = true; 7039 run_again(sdata, assoc_data->timeout); 7040 } else { 7041 assoc_data->timeout = 7042 round_jiffies_up(jiffies + 7043 IEEE80211_ASSOC_TIMEOUT_LONG); 7044 assoc_data->timeout_started = true; 7045 run_again(sdata, assoc_data->timeout); 7046 } 7047 7048 return 0; 7049 } 7050 7051 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7052 __le16 fc, bool acked) 7053 { 7054 struct ieee80211_local *local = sdata->local; 7055 7056 sdata->u.mgd.status_fc = fc; 7057 sdata->u.mgd.status_acked = acked; 7058 sdata->u.mgd.status_received = true; 7059 7060 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7061 } 7062 7063 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7064 { 7065 struct ieee80211_local *local = sdata->local; 7066 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7067 7068 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7069 7070 if (ifmgd->status_received) { 7071 __le16 fc = ifmgd->status_fc; 7072 bool status_acked = ifmgd->status_acked; 7073 7074 ifmgd->status_received = false; 7075 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7076 if (status_acked) { 7077 if (ifmgd->auth_data->algorithm == 7078 WLAN_AUTH_SAE) 7079 ifmgd->auth_data->timeout = 7080 jiffies + 7081 IEEE80211_AUTH_TIMEOUT_SAE; 7082 else 7083 ifmgd->auth_data->timeout = 7084 jiffies + 7085 IEEE80211_AUTH_TIMEOUT_SHORT; 7086 run_again(sdata, ifmgd->auth_data->timeout); 7087 } else { 7088 ifmgd->auth_data->timeout = jiffies - 1; 7089 } 7090 ifmgd->auth_data->timeout_started = true; 7091 } else if (ifmgd->assoc_data && 7092 !ifmgd->assoc_data->comeback && 7093 (ieee80211_is_assoc_req(fc) || 7094 ieee80211_is_reassoc_req(fc))) { 7095 /* 7096 * Update association timeout based on the TX status 7097 * for the (Re)Association Request frame. Skip this if 7098 * we have already processed a (Re)Association Response 7099 * frame that indicated need for association comeback 7100 * at a specific time in the future. This could happen 7101 * if the TX status information is delayed enough for 7102 * the response to be received and processed first. 7103 */ 7104 if (status_acked) { 7105 ifmgd->assoc_data->timeout = 7106 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7107 run_again(sdata, ifmgd->assoc_data->timeout); 7108 } else { 7109 ifmgd->assoc_data->timeout = jiffies - 1; 7110 } 7111 ifmgd->assoc_data->timeout_started = true; 7112 } 7113 } 7114 7115 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7116 time_after(jiffies, ifmgd->auth_data->timeout)) { 7117 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7118 /* 7119 * ok ... we waited for assoc or continuation but 7120 * userspace didn't do it, so kill the auth data 7121 */ 7122 ieee80211_destroy_auth_data(sdata, false); 7123 } else if (ieee80211_auth(sdata)) { 7124 u8 ap_addr[ETH_ALEN]; 7125 struct ieee80211_event event = { 7126 .type = MLME_EVENT, 7127 .u.mlme.data = AUTH_EVENT, 7128 .u.mlme.status = MLME_TIMEOUT, 7129 }; 7130 7131 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7132 7133 ieee80211_destroy_auth_data(sdata, false); 7134 7135 cfg80211_auth_timeout(sdata->dev, ap_addr); 7136 drv_event_callback(sdata->local, sdata, &event); 7137 } 7138 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7139 run_again(sdata, ifmgd->auth_data->timeout); 7140 7141 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7142 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7143 if ((ifmgd->assoc_data->need_beacon && 7144 !sdata->deflink.u.mgd.have_beacon) || 7145 ieee80211_do_assoc(sdata)) { 7146 struct ieee80211_event event = { 7147 .type = MLME_EVENT, 7148 .u.mlme.data = ASSOC_EVENT, 7149 .u.mlme.status = MLME_TIMEOUT, 7150 }; 7151 7152 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7153 drv_event_callback(sdata->local, sdata, &event); 7154 } 7155 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7156 run_again(sdata, ifmgd->assoc_data->timeout); 7157 7158 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7159 ifmgd->associated) { 7160 u8 *bssid = sdata->deflink.u.mgd.bssid; 7161 int max_tries; 7162 7163 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7164 max_tries = max_nullfunc_tries; 7165 else 7166 max_tries = max_probe_tries; 7167 7168 /* ACK received for nullfunc probing frame */ 7169 if (!ifmgd->probe_send_count) 7170 ieee80211_reset_ap_probe(sdata); 7171 else if (ifmgd->nullfunc_failed) { 7172 if (ifmgd->probe_send_count < max_tries) { 7173 mlme_dbg(sdata, 7174 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7175 bssid, ifmgd->probe_send_count, 7176 max_tries); 7177 ieee80211_mgd_probe_ap_send(sdata); 7178 } else { 7179 mlme_dbg(sdata, 7180 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7181 bssid); 7182 ieee80211_sta_connection_lost(sdata, 7183 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7184 false); 7185 } 7186 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7187 run_again(sdata, ifmgd->probe_timeout); 7188 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7189 mlme_dbg(sdata, 7190 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7191 bssid, probe_wait_ms); 7192 ieee80211_sta_connection_lost(sdata, 7193 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7194 } else if (ifmgd->probe_send_count < max_tries) { 7195 mlme_dbg(sdata, 7196 "No probe response from AP %pM after %dms, try %d/%i\n", 7197 bssid, probe_wait_ms, 7198 ifmgd->probe_send_count, max_tries); 7199 ieee80211_mgd_probe_ap_send(sdata); 7200 } else { 7201 /* 7202 * We actually lost the connection ... or did we? 7203 * Let's make sure! 7204 */ 7205 mlme_dbg(sdata, 7206 "No probe response from AP %pM after %dms, disconnecting.\n", 7207 bssid, probe_wait_ms); 7208 7209 ieee80211_sta_connection_lost(sdata, 7210 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7211 } 7212 } 7213 } 7214 7215 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7216 { 7217 struct ieee80211_sub_if_data *sdata = 7218 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7219 7220 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7221 return; 7222 7223 if (sdata->vif.bss_conf.csa_active && 7224 !sdata->deflink.u.mgd.csa_waiting_bcn) 7225 return; 7226 7227 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7228 return; 7229 7230 sdata->u.mgd.connection_loss = false; 7231 wiphy_work_queue(sdata->local->hw.wiphy, 7232 &sdata->u.mgd.beacon_connection_loss_work); 7233 } 7234 7235 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7236 { 7237 struct ieee80211_sub_if_data *sdata = 7238 from_timer(sdata, t, u.mgd.conn_mon_timer); 7239 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7240 struct ieee80211_local *local = sdata->local; 7241 struct sta_info *sta; 7242 unsigned long timeout; 7243 7244 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7245 return; 7246 7247 if (sdata->vif.bss_conf.csa_active && 7248 !sdata->deflink.u.mgd.csa_waiting_bcn) 7249 return; 7250 7251 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7252 if (!sta) 7253 return; 7254 7255 timeout = sta->deflink.status_stats.last_ack; 7256 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7257 timeout = sta->deflink.rx_stats.last_rx; 7258 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7259 7260 /* If timeout is after now, then update timer to fire at 7261 * the later date, but do not actually probe at this time. 7262 */ 7263 if (time_is_after_jiffies(timeout)) { 7264 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7265 return; 7266 } 7267 7268 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7269 } 7270 7271 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7272 struct wiphy_work *work) 7273 { 7274 struct ieee80211_sub_if_data *sdata = 7275 container_of(work, struct ieee80211_sub_if_data, 7276 u.mgd.monitor_work); 7277 7278 ieee80211_mgd_probe_ap(sdata, false); 7279 } 7280 7281 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7282 { 7283 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7284 __ieee80211_stop_poll(sdata); 7285 7286 /* let's probe the connection once */ 7287 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7288 wiphy_work_queue(sdata->local->hw.wiphy, 7289 &sdata->u.mgd.monitor_work); 7290 } 7291 } 7292 7293 #ifdef CONFIG_PM 7294 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7295 { 7296 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7297 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7298 7299 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7300 7301 if (ifmgd->auth_data || ifmgd->assoc_data) { 7302 const u8 *ap_addr = ifmgd->auth_data ? 7303 ifmgd->auth_data->ap_addr : 7304 ifmgd->assoc_data->ap_addr; 7305 7306 /* 7307 * If we are trying to authenticate / associate while suspending, 7308 * cfg80211 won't know and won't actually abort those attempts, 7309 * thus we need to do that ourselves. 7310 */ 7311 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7312 IEEE80211_STYPE_DEAUTH, 7313 WLAN_REASON_DEAUTH_LEAVING, 7314 false, frame_buf); 7315 if (ifmgd->assoc_data) 7316 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7317 if (ifmgd->auth_data) 7318 ieee80211_destroy_auth_data(sdata, false); 7319 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7320 IEEE80211_DEAUTH_FRAME_LEN, 7321 false); 7322 } 7323 7324 /* This is a bit of a hack - we should find a better and more generic 7325 * solution to this. Normally when suspending, cfg80211 will in fact 7326 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7327 * auth (not so important) or assoc (this is the problem) process. 7328 * 7329 * As a consequence, it can happen that we are in the process of both 7330 * associating and suspending, and receive an association response 7331 * after cfg80211 has checked if it needs to disconnect, but before 7332 * we actually set the flag to drop incoming frames. This will then 7333 * cause the workqueue flush to process the association response in 7334 * the suspend, resulting in a successful association just before it 7335 * tries to remove the interface from the driver, which now though 7336 * has a channel context assigned ... this results in issues. 7337 * 7338 * To work around this (for now) simply deauth here again if we're 7339 * now connected. 7340 */ 7341 if (ifmgd->associated && !sdata->local->wowlan) { 7342 u8 bssid[ETH_ALEN]; 7343 struct cfg80211_deauth_request req = { 7344 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 7345 .bssid = bssid, 7346 }; 7347 7348 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7349 ieee80211_mgd_deauth(sdata, &req); 7350 } 7351 } 7352 #endif 7353 7354 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 7355 { 7356 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7357 7358 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7359 7360 if (!ifmgd->associated) 7361 return; 7362 7363 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 7364 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 7365 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 7366 ieee80211_sta_connection_lost(sdata, 7367 WLAN_REASON_UNSPECIFIED, 7368 true); 7369 return; 7370 } 7371 7372 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 7373 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 7374 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 7375 ieee80211_sta_connection_lost(sdata, 7376 WLAN_REASON_UNSPECIFIED, 7377 true); 7378 return; 7379 } 7380 } 7381 7382 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 7383 struct wiphy_work *work) 7384 { 7385 struct ieee80211_link_data *link = 7386 container_of(work, struct ieee80211_link_data, 7387 u.mgd.request_smps_work); 7388 7389 __ieee80211_request_smps_mgd(link->sdata, link, 7390 link->u.mgd.driver_smps_mode); 7391 } 7392 7393 /* interface setup */ 7394 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 7395 { 7396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7397 7398 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 7399 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 7400 ieee80211_beacon_connection_loss_work); 7401 wiphy_work_init(&ifmgd->csa_connection_drop_work, 7402 ieee80211_csa_connection_drop_work); 7403 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 7404 ieee80211_tdls_peer_del_work); 7405 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 7406 ieee80211_ml_reconf_work); 7407 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 7408 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 7409 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 7410 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 7411 ieee80211_sta_handle_tspec_ac_params_wk); 7412 wiphy_delayed_work_init(&ifmgd->ttlm_work, 7413 ieee80211_tid_to_link_map_work); 7414 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 7415 ieee80211_neg_ttlm_timeout_work); 7416 7417 ifmgd->flags = 0; 7418 ifmgd->powersave = sdata->wdev.ps; 7419 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 7420 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 7421 /* Setup TDLS data */ 7422 spin_lock_init(&ifmgd->teardown_lock); 7423 ifmgd->teardown_skb = NULL; 7424 ifmgd->orig_teardown_skb = NULL; 7425 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 7426 } 7427 7428 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 7429 struct wiphy_work *work) 7430 { 7431 struct ieee80211_link_data *link = 7432 container_of(work, struct ieee80211_link_data, 7433 u.mgd.recalc_smps); 7434 7435 ieee80211_recalc_smps(link->sdata, link); 7436 } 7437 7438 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 7439 { 7440 struct ieee80211_sub_if_data *sdata = link->sdata; 7441 struct ieee80211_local *local = sdata->local; 7442 unsigned int link_id = link->link_id; 7443 7444 link->u.mgd.p2p_noa_index = -1; 7445 link->conf->bssid = link->u.mgd.bssid; 7446 link->smps_mode = IEEE80211_SMPS_OFF; 7447 7448 wiphy_work_init(&link->u.mgd.request_smps_work, 7449 ieee80211_request_smps_mgd_work); 7450 wiphy_work_init(&link->u.mgd.recalc_smps, 7451 ieee80211_recalc_smps_work); 7452 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 7453 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 7454 else 7455 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 7456 7457 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 7458 ieee80211_chswitch_work); 7459 7460 if (sdata->u.mgd.assoc_data) 7461 ether_addr_copy(link->conf->addr, 7462 sdata->u.mgd.assoc_data->link[link_id].addr); 7463 else if (!is_valid_ether_addr(link->conf->addr)) 7464 eth_random_addr(link->conf->addr); 7465 } 7466 7467 /* scan finished notification */ 7468 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 7469 { 7470 struct ieee80211_sub_if_data *sdata; 7471 7472 /* Restart STA timers */ 7473 rcu_read_lock(); 7474 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 7475 if (ieee80211_sdata_running(sdata)) 7476 ieee80211_restart_sta_timer(sdata); 7477 } 7478 rcu_read_unlock(); 7479 } 7480 7481 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 7482 struct cfg80211_bss *cbss, s8 link_id, 7483 const u8 *ap_mld_addr, bool assoc, 7484 struct ieee80211_conn_settings *conn, 7485 bool override) 7486 { 7487 struct ieee80211_local *local = sdata->local; 7488 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7489 struct ieee80211_bss *bss = (void *)cbss->priv; 7490 struct sta_info *new_sta = NULL; 7491 struct ieee80211_link_data *link; 7492 bool have_sta = false; 7493 bool mlo; 7494 int err; 7495 7496 if (link_id >= 0) { 7497 mlo = true; 7498 if (WARN_ON(!ap_mld_addr)) 7499 return -EINVAL; 7500 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 7501 } else { 7502 if (WARN_ON(ap_mld_addr)) 7503 return -EINVAL; 7504 ap_mld_addr = cbss->bssid; 7505 err = ieee80211_vif_set_links(sdata, 0, 0); 7506 link_id = 0; 7507 mlo = false; 7508 } 7509 7510 if (err) 7511 return err; 7512 7513 link = sdata_dereference(sdata->link[link_id], sdata); 7514 if (WARN_ON(!link)) { 7515 err = -ENOLINK; 7516 goto out_err; 7517 } 7518 7519 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 7520 err = -EINVAL; 7521 goto out_err; 7522 } 7523 7524 /* If a reconfig is happening, bail out */ 7525 if (local->in_reconfig) { 7526 err = -EBUSY; 7527 goto out_err; 7528 } 7529 7530 if (assoc) { 7531 rcu_read_lock(); 7532 have_sta = sta_info_get(sdata, ap_mld_addr); 7533 rcu_read_unlock(); 7534 } 7535 7536 if (!have_sta) { 7537 if (mlo) 7538 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 7539 link_id, cbss->bssid, 7540 GFP_KERNEL); 7541 else 7542 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 7543 7544 if (!new_sta) { 7545 err = -ENOMEM; 7546 goto out_err; 7547 } 7548 7549 new_sta->sta.mlo = mlo; 7550 } 7551 7552 /* 7553 * Set up the information for the new channel before setting the 7554 * new channel. We can't - completely race-free - change the basic 7555 * rates bitmap and the channel (sband) that it refers to, but if 7556 * we set it up before we at least avoid calling into the driver's 7557 * bss_info_changed() method with invalid information (since we do 7558 * call that from changing the channel - only for IDLE and perhaps 7559 * some others, but ...). 7560 * 7561 * So to avoid that, just set up all the new information before the 7562 * channel, but tell the driver to apply it only afterwards, since 7563 * it might need the new channel for that. 7564 */ 7565 if (new_sta) { 7566 const struct cfg80211_bss_ies *ies; 7567 struct link_sta_info *link_sta; 7568 7569 rcu_read_lock(); 7570 link_sta = rcu_dereference(new_sta->link[link_id]); 7571 if (WARN_ON(!link_sta)) { 7572 rcu_read_unlock(); 7573 sta_info_free(local, new_sta); 7574 err = -EINVAL; 7575 goto out_err; 7576 } 7577 7578 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7579 link_sta, cbss); 7580 if (err) { 7581 rcu_read_unlock(); 7582 sta_info_free(local, new_sta); 7583 goto out_err; 7584 } 7585 7586 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7587 7588 /* set timing information */ 7589 link->conf->beacon_int = cbss->beacon_interval; 7590 ies = rcu_dereference(cbss->beacon_ies); 7591 if (ies) { 7592 link->conf->sync_tsf = ies->tsf; 7593 link->conf->sync_device_ts = 7594 bss->device_ts_beacon; 7595 7596 ieee80211_get_dtim(ies, 7597 &link->conf->sync_dtim_count, 7598 NULL); 7599 } else if (!ieee80211_hw_check(&sdata->local->hw, 7600 TIMING_BEACON_ONLY)) { 7601 ies = rcu_dereference(cbss->proberesp_ies); 7602 /* must be non-NULL since beacon IEs were NULL */ 7603 link->conf->sync_tsf = ies->tsf; 7604 link->conf->sync_device_ts = 7605 bss->device_ts_presp; 7606 link->conf->sync_dtim_count = 0; 7607 } else { 7608 link->conf->sync_tsf = 0; 7609 link->conf->sync_device_ts = 0; 7610 link->conf->sync_dtim_count = 0; 7611 } 7612 rcu_read_unlock(); 7613 } 7614 7615 if (new_sta || override) { 7616 /* 7617 * Only set this if we're also going to calculate the AP 7618 * settings etc., otherwise this was set before in a 7619 * previous call. Note override is set to %true in assoc 7620 * if the settings were changed. 7621 */ 7622 link->u.mgd.conn = *conn; 7623 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 7624 mlo, &link->u.mgd.conn); 7625 if (err) { 7626 if (new_sta) 7627 sta_info_free(local, new_sta); 7628 goto out_err; 7629 } 7630 /* pass out for use in assoc */ 7631 *conn = link->u.mgd.conn; 7632 } 7633 7634 if (new_sta) { 7635 /* 7636 * tell driver about BSSID, basic rates and timing 7637 * this was set up above, before setting the channel 7638 */ 7639 ieee80211_link_info_change_notify(sdata, link, 7640 BSS_CHANGED_BSSID | 7641 BSS_CHANGED_BASIC_RATES | 7642 BSS_CHANGED_BEACON_INT); 7643 7644 if (assoc) 7645 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7646 7647 err = sta_info_insert(new_sta); 7648 new_sta = NULL; 7649 if (err) { 7650 sdata_info(sdata, 7651 "failed to insert STA entry for the AP (error %d)\n", 7652 err); 7653 goto out_err; 7654 } 7655 } else 7656 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7657 7658 /* Cancel scan to ensure that nothing interferes with connection */ 7659 if (local->scanning) 7660 ieee80211_scan_cancel(local); 7661 7662 return 0; 7663 7664 out_err: 7665 ieee80211_link_release_channel(&sdata->deflink); 7666 ieee80211_vif_set_links(sdata, 0, 0); 7667 return err; 7668 } 7669 7670 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 7671 const struct cfg80211_bss_ies *ies, 7672 u8 cur_channel, bool ignore_ecsa) 7673 { 7674 const struct element *csa_elem, *ecsa_elem; 7675 struct ieee80211_channel_sw_ie *csa = NULL; 7676 struct ieee80211_ext_chansw_ie *ecsa = NULL; 7677 7678 if (!ies) 7679 return false; 7680 7681 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 7682 ies->data, ies->len); 7683 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 7684 csa = (void *)csa_elem->data; 7685 7686 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 7687 ies->data, ies->len); 7688 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 7689 ecsa = (void *)ecsa_elem->data; 7690 7691 if (csa && csa->count == 0) 7692 csa = NULL; 7693 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 7694 csa = NULL; 7695 7696 if (ecsa && ecsa->count == 0) 7697 ecsa = NULL; 7698 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 7699 ecsa = NULL; 7700 7701 if (ignore_ecsa && ecsa) { 7702 sdata_info(sdata, 7703 "Ignoring ECSA in probe response - was considered stuck!\n"); 7704 return csa; 7705 } 7706 7707 return csa || ecsa; 7708 } 7709 7710 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 7711 struct cfg80211_bss *bss) 7712 { 7713 u8 cur_channel; 7714 bool ret; 7715 7716 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 7717 7718 rcu_read_lock(); 7719 if (ieee80211_mgd_csa_present(sdata, 7720 rcu_dereference(bss->beacon_ies), 7721 cur_channel, false)) { 7722 ret = true; 7723 goto out; 7724 } 7725 7726 if (ieee80211_mgd_csa_present(sdata, 7727 rcu_dereference(bss->proberesp_ies), 7728 cur_channel, bss->proberesp_ecsa_stuck)) { 7729 ret = true; 7730 goto out; 7731 } 7732 7733 ret = false; 7734 out: 7735 rcu_read_unlock(); 7736 return ret; 7737 } 7738 7739 /* config hooks */ 7740 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 7741 struct cfg80211_auth_request *req) 7742 { 7743 struct ieee80211_local *local = sdata->local; 7744 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7745 struct ieee80211_mgd_auth_data *auth_data; 7746 struct ieee80211_conn_settings conn; 7747 struct ieee80211_link_data *link; 7748 struct ieee80211_supported_band *sband; 7749 struct ieee80211_bss *bss; 7750 u16 auth_alg; 7751 int err; 7752 bool cont_auth, wmm_used; 7753 7754 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7755 7756 /* prepare auth data structure */ 7757 7758 switch (req->auth_type) { 7759 case NL80211_AUTHTYPE_OPEN_SYSTEM: 7760 auth_alg = WLAN_AUTH_OPEN; 7761 break; 7762 case NL80211_AUTHTYPE_SHARED_KEY: 7763 if (fips_enabled) 7764 return -EOPNOTSUPP; 7765 auth_alg = WLAN_AUTH_SHARED_KEY; 7766 break; 7767 case NL80211_AUTHTYPE_FT: 7768 auth_alg = WLAN_AUTH_FT; 7769 break; 7770 case NL80211_AUTHTYPE_NETWORK_EAP: 7771 auth_alg = WLAN_AUTH_LEAP; 7772 break; 7773 case NL80211_AUTHTYPE_SAE: 7774 auth_alg = WLAN_AUTH_SAE; 7775 break; 7776 case NL80211_AUTHTYPE_FILS_SK: 7777 auth_alg = WLAN_AUTH_FILS_SK; 7778 break; 7779 case NL80211_AUTHTYPE_FILS_SK_PFS: 7780 auth_alg = WLAN_AUTH_FILS_SK_PFS; 7781 break; 7782 case NL80211_AUTHTYPE_FILS_PK: 7783 auth_alg = WLAN_AUTH_FILS_PK; 7784 break; 7785 default: 7786 return -EOPNOTSUPP; 7787 } 7788 7789 if (ifmgd->assoc_data) 7790 return -EBUSY; 7791 7792 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 7793 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 7794 return -EINVAL; 7795 } 7796 7797 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 7798 req->ie_len, GFP_KERNEL); 7799 if (!auth_data) 7800 return -ENOMEM; 7801 7802 memcpy(auth_data->ap_addr, 7803 req->ap_mld_addr ?: req->bss->bssid, 7804 ETH_ALEN); 7805 auth_data->bss = req->bss; 7806 auth_data->link_id = req->link_id; 7807 7808 if (req->auth_data_len >= 4) { 7809 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 7810 __le16 *pos = (__le16 *) req->auth_data; 7811 7812 auth_data->sae_trans = le16_to_cpu(pos[0]); 7813 auth_data->sae_status = le16_to_cpu(pos[1]); 7814 } 7815 memcpy(auth_data->data, req->auth_data + 4, 7816 req->auth_data_len - 4); 7817 auth_data->data_len += req->auth_data_len - 4; 7818 } 7819 7820 /* Check if continuing authentication or trying to authenticate with the 7821 * same BSS that we were in the process of authenticating with and avoid 7822 * removal and re-addition of the STA entry in 7823 * ieee80211_prep_connection(). 7824 */ 7825 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 7826 ifmgd->auth_data->link_id == req->link_id; 7827 7828 if (req->ie && req->ie_len) { 7829 memcpy(&auth_data->data[auth_data->data_len], 7830 req->ie, req->ie_len); 7831 auth_data->data_len += req->ie_len; 7832 } 7833 7834 if (req->key && req->key_len) { 7835 auth_data->key_len = req->key_len; 7836 auth_data->key_idx = req->key_idx; 7837 memcpy(auth_data->key, req->key, req->key_len); 7838 } 7839 7840 auth_data->algorithm = auth_alg; 7841 7842 /* try to authenticate/probe */ 7843 7844 if (ifmgd->auth_data) { 7845 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 7846 auth_data->peer_confirmed = 7847 ifmgd->auth_data->peer_confirmed; 7848 } 7849 ieee80211_destroy_auth_data(sdata, cont_auth); 7850 } 7851 7852 /* prep auth_data so we don't go into idle on disassoc */ 7853 ifmgd->auth_data = auth_data; 7854 7855 /* If this is continuation of an ongoing SAE authentication exchange 7856 * (i.e., request to send SAE Confirm) and the peer has already 7857 * confirmed, mark authentication completed since we are about to send 7858 * out SAE Confirm. 7859 */ 7860 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 7861 auth_data->peer_confirmed && auth_data->sae_trans == 2) 7862 ieee80211_mark_sta_auth(sdata); 7863 7864 if (ifmgd->associated) { 7865 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7866 7867 sdata_info(sdata, 7868 "disconnect from AP %pM for new auth to %pM\n", 7869 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 7870 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7871 WLAN_REASON_UNSPECIFIED, 7872 false, frame_buf); 7873 7874 ieee80211_report_disconnect(sdata, frame_buf, 7875 sizeof(frame_buf), true, 7876 WLAN_REASON_UNSPECIFIED, 7877 false); 7878 } 7879 7880 /* needed for transmitting the auth frame(s) properly */ 7881 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 7882 7883 bss = (void *)req->bss->priv; 7884 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 7885 7886 sband = local->hw.wiphy->bands[req->bss->channel->band]; 7887 7888 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 7889 &conn); 7890 7891 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 7892 req->ap_mld_addr, cont_auth, 7893 &conn, false); 7894 if (err) 7895 goto err_clear; 7896 7897 if (req->link_id >= 0) 7898 link = sdata_dereference(sdata->link[req->link_id], sdata); 7899 else 7900 link = &sdata->deflink; 7901 7902 if (WARN_ON(!link)) { 7903 err = -ENOLINK; 7904 goto err_clear; 7905 } 7906 7907 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 7908 auth_data->ap_addr, link->conf->addr); 7909 7910 err = ieee80211_auth(sdata); 7911 if (err) { 7912 sta_info_destroy_addr(sdata, auth_data->ap_addr); 7913 goto err_clear; 7914 } 7915 7916 /* hold our own reference */ 7917 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 7918 return 0; 7919 7920 err_clear: 7921 if (!ieee80211_vif_is_mld(&sdata->vif)) { 7922 eth_zero_addr(sdata->deflink.u.mgd.bssid); 7923 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 7924 BSS_CHANGED_BSSID); 7925 ieee80211_link_release_channel(&sdata->deflink); 7926 } 7927 ifmgd->auth_data = NULL; 7928 kfree(auth_data); 7929 return err; 7930 } 7931 7932 static void 7933 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 7934 struct ieee80211_mgd_assoc_data *assoc_data, 7935 struct cfg80211_assoc_request *req, 7936 struct ieee80211_conn_settings *conn, 7937 unsigned int link_id) 7938 { 7939 struct ieee80211_local *local = sdata->local; 7940 const struct cfg80211_bss_ies *bss_ies; 7941 struct ieee80211_supported_band *sband; 7942 struct ieee80211_link_data *link; 7943 struct cfg80211_bss *cbss; 7944 struct ieee80211_bss *bss; 7945 7946 cbss = assoc_data->link[link_id].bss; 7947 if (WARN_ON(!cbss)) 7948 return; 7949 7950 bss = (void *)cbss->priv; 7951 7952 sband = local->hw.wiphy->bands[cbss->channel->band]; 7953 if (WARN_ON(!sband)) 7954 return; 7955 7956 link = sdata_dereference(sdata->link[link_id], sdata); 7957 if (WARN_ON(!link)) 7958 return; 7959 7960 /* for MLO connections assume advertising all rates is OK */ 7961 if (!req->ap_mld_addr) { 7962 assoc_data->supp_rates = bss->supp_rates; 7963 assoc_data->supp_rates_len = bss->supp_rates_len; 7964 } 7965 7966 /* copy and link elems for the STA profile */ 7967 if (req->links[link_id].elems_len) { 7968 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 7969 req->links[link_id].elems_len); 7970 assoc_data->link[link_id].elems = assoc_data->ie_pos; 7971 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 7972 assoc_data->ie_pos += req->links[link_id].elems_len; 7973 } 7974 7975 link->u.mgd.beacon_crc_valid = false; 7976 link->u.mgd.dtim_period = 0; 7977 link->u.mgd.have_beacon = false; 7978 7979 /* override HT configuration only if the AP and we support it */ 7980 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 7981 struct ieee80211_sta_ht_cap sta_ht_cap; 7982 7983 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 7984 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 7985 } 7986 7987 rcu_read_lock(); 7988 bss_ies = rcu_dereference(cbss->beacon_ies); 7989 if (bss_ies) { 7990 u8 dtim_count = 0; 7991 7992 ieee80211_get_dtim(bss_ies, &dtim_count, 7993 &link->u.mgd.dtim_period); 7994 7995 sdata->deflink.u.mgd.have_beacon = true; 7996 7997 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 7998 link->conf->sync_tsf = bss_ies->tsf; 7999 link->conf->sync_device_ts = bss->device_ts_beacon; 8000 link->conf->sync_dtim_count = dtim_count; 8001 } 8002 } else { 8003 bss_ies = rcu_dereference(cbss->ies); 8004 } 8005 8006 if (bss_ies) { 8007 const struct element *elem; 8008 8009 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8010 bss_ies->data, bss_ies->len); 8011 if (elem && elem->datalen >= 3) 8012 link->conf->profile_periodicity = elem->data[2]; 8013 else 8014 link->conf->profile_periodicity = 0; 8015 8016 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8017 bss_ies->data, bss_ies->len); 8018 if (elem && elem->datalen >= 11 && 8019 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8020 link->conf->ema_ap = true; 8021 else 8022 link->conf->ema_ap = false; 8023 } 8024 rcu_read_unlock(); 8025 8026 if (bss->corrupt_data) { 8027 char *corrupt_type = "data"; 8028 8029 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8030 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8031 corrupt_type = "beacon and probe response"; 8032 else 8033 corrupt_type = "beacon"; 8034 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8035 corrupt_type = "probe response"; 8036 } 8037 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8038 cbss->bssid, corrupt_type); 8039 } 8040 8041 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8042 if (sdata->u.mgd.powersave) 8043 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8044 else 8045 link->smps_mode = IEEE80211_SMPS_OFF; 8046 } else { 8047 link->smps_mode = link->u.mgd.req_smps; 8048 } 8049 } 8050 8051 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8052 struct cfg80211_assoc_request *req) 8053 { 8054 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8055 struct ieee80211_local *local = sdata->local; 8056 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8057 struct ieee80211_mgd_assoc_data *assoc_data; 8058 const struct element *ssid_elem; 8059 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8060 struct ieee80211_link_data *link; 8061 struct cfg80211_bss *cbss; 8062 bool override, uapsd_supported; 8063 bool match_auth; 8064 int i, err; 8065 size_t size = sizeof(*assoc_data) + req->ie_len; 8066 8067 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8068 size += req->links[i].elems_len; 8069 8070 /* FIXME: no support for 4-addr MLO yet */ 8071 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8072 return -EOPNOTSUPP; 8073 8074 assoc_data = kzalloc(size, GFP_KERNEL); 8075 if (!assoc_data) 8076 return -ENOMEM; 8077 8078 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8079 8080 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8081 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8082 err = -EINVAL; 8083 goto err_free; 8084 } 8085 8086 rcu_read_lock(); 8087 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8088 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8089 rcu_read_unlock(); 8090 err = -EINVAL; 8091 goto err_free; 8092 } 8093 8094 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8095 assoc_data->ssid_len = ssid_elem->datalen; 8096 rcu_read_unlock(); 8097 8098 if (req->ap_mld_addr) 8099 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8100 else 8101 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8102 8103 if (ifmgd->associated) { 8104 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8105 8106 sdata_info(sdata, 8107 "disconnect from AP %pM for new assoc to %pM\n", 8108 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8109 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8110 WLAN_REASON_UNSPECIFIED, 8111 false, frame_buf); 8112 8113 ieee80211_report_disconnect(sdata, frame_buf, 8114 sizeof(frame_buf), true, 8115 WLAN_REASON_UNSPECIFIED, 8116 false); 8117 } 8118 8119 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8120 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8121 sizeof(ifmgd->ht_capa_mask)); 8122 8123 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8124 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8125 sizeof(ifmgd->vht_capa_mask)); 8126 8127 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8128 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8129 sizeof(ifmgd->s1g_capa_mask)); 8130 8131 /* keep some setup (AP STA, channel, ...) if matching */ 8132 if (ifmgd->auth_data) 8133 match_auth = ether_addr_equal(ifmgd->auth_data->ap_addr, 8134 assoc_data->ap_addr) && 8135 ifmgd->auth_data->link_id == req->link_id; 8136 8137 if (req->ap_mld_addr) { 8138 uapsd_supported = true; 8139 8140 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8141 struct ieee80211_supported_band *sband; 8142 struct cfg80211_bss *link_cbss = req->links[i].bss; 8143 struct ieee80211_bss *bss; 8144 8145 if (!link_cbss) 8146 continue; 8147 8148 bss = (void *)link_cbss->priv; 8149 8150 if (!bss->wmm_used) { 8151 err = -EINVAL; 8152 goto err_free; 8153 } 8154 8155 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8156 ASSOC_REQ_DISABLE_VHT | 8157 ASSOC_REQ_DISABLE_HE | 8158 ASSOC_REQ_DISABLE_EHT)) { 8159 err = -EINVAL; 8160 goto err_free; 8161 } 8162 8163 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8164 err = -EINVAL; 8165 goto err_free; 8166 } 8167 8168 link = sdata_dereference(sdata->link[i], sdata); 8169 if (link) 8170 ether_addr_copy(assoc_data->link[i].addr, 8171 link->conf->addr); 8172 else 8173 eth_random_addr(assoc_data->link[i].addr); 8174 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8175 8176 if (match_auth && i == assoc_link_id) 8177 assoc_data->link[i].conn = link->u.mgd.conn; 8178 else 8179 assoc_data->link[i].conn = 8180 ieee80211_conn_settings_unlimited; 8181 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8182 req, true, i, 8183 &assoc_data->link[i].conn); 8184 assoc_data->link[i].bss = link_cbss; 8185 assoc_data->link[i].disabled = req->links[i].disabled; 8186 8187 if (!bss->uapsd_supported) 8188 uapsd_supported = false; 8189 8190 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 8191 err = -EINVAL; 8192 req->links[i].error = err; 8193 goto err_free; 8194 } 8195 } 8196 8197 assoc_data->wmm = true; 8198 } else { 8199 struct ieee80211_supported_band *sband; 8200 struct ieee80211_bss *bss = (void *)cbss->priv; 8201 8202 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8203 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8204 8205 assoc_data->wmm = bss->wmm_used && 8206 (local->hw.queues >= IEEE80211_NUM_ACS); 8207 8208 if (cbss->channel->band == NL80211_BAND_6GHZ && 8209 req->flags & (ASSOC_REQ_DISABLE_HT | 8210 ASSOC_REQ_DISABLE_VHT | 8211 ASSOC_REQ_DISABLE_HE)) { 8212 err = -EINVAL; 8213 goto err_free; 8214 } 8215 8216 sband = local->hw.wiphy->bands[cbss->channel->band]; 8217 8218 assoc_data->link[0].bss = cbss; 8219 8220 if (match_auth) 8221 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 8222 else 8223 assoc_data->link[0].conn = 8224 ieee80211_conn_settings_unlimited; 8225 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 8226 assoc_data->wmm, 0, 8227 &assoc_data->link[0].conn); 8228 8229 uapsd_supported = bss->uapsd_supported; 8230 } 8231 8232 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8233 8234 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8235 err = -EBUSY; 8236 goto err_free; 8237 } 8238 8239 if (ifmgd->assoc_data) { 8240 err = -EBUSY; 8241 goto err_free; 8242 } 8243 8244 /* Cleanup is delayed if auth_data matches */ 8245 if (ifmgd->auth_data && !match_auth) 8246 ieee80211_destroy_auth_data(sdata, false); 8247 8248 if (req->ie && req->ie_len) { 8249 memcpy(assoc_data->ie, req->ie, req->ie_len); 8250 assoc_data->ie_len = req->ie_len; 8251 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 8252 } else { 8253 assoc_data->ie_pos = assoc_data->ie; 8254 } 8255 8256 if (req->fils_kek) { 8257 /* should already be checked in cfg80211 - so warn */ 8258 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 8259 err = -EINVAL; 8260 goto err_free; 8261 } 8262 memcpy(assoc_data->fils_kek, req->fils_kek, 8263 req->fils_kek_len); 8264 assoc_data->fils_kek_len = req->fils_kek_len; 8265 } 8266 8267 if (req->fils_nonces) 8268 memcpy(assoc_data->fils_nonces, req->fils_nonces, 8269 2 * FILS_NONCE_LEN); 8270 8271 /* default timeout */ 8272 assoc_data->timeout = jiffies; 8273 assoc_data->timeout_started = true; 8274 8275 assoc_data->assoc_link_id = assoc_link_id; 8276 8277 if (req->ap_mld_addr) { 8278 /* if there was no authentication, set up the link */ 8279 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 8280 if (err) 8281 goto err_clear; 8282 } 8283 8284 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 8285 if (WARN_ON(!link)) { 8286 err = -EINVAL; 8287 goto err_clear; 8288 } 8289 8290 override = link->u.mgd.conn.mode != 8291 assoc_data->link[assoc_link_id].conn.mode || 8292 link->u.mgd.conn.bw_limit != 8293 assoc_data->link[assoc_link_id].conn.bw_limit; 8294 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 8295 8296 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 8297 assoc_link_id); 8298 8299 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 8300 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 8301 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 8302 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 8303 8304 if (assoc_data->wmm && uapsd_supported && 8305 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 8306 assoc_data->uapsd = true; 8307 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 8308 } else { 8309 assoc_data->uapsd = false; 8310 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 8311 } 8312 8313 if (req->prev_bssid) 8314 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 8315 8316 if (req->use_mfp) { 8317 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 8318 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 8319 } else { 8320 ifmgd->mfp = IEEE80211_MFP_DISABLED; 8321 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 8322 } 8323 8324 if (req->flags & ASSOC_REQ_USE_RRM) 8325 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 8326 else 8327 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 8328 8329 if (req->crypto.control_port) 8330 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 8331 else 8332 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 8333 8334 sdata->control_port_protocol = req->crypto.control_port_ethertype; 8335 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 8336 sdata->control_port_over_nl80211 = 8337 req->crypto.control_port_over_nl80211; 8338 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 8339 8340 /* kick off associate process */ 8341 ifmgd->assoc_data = assoc_data; 8342 8343 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 8344 if (!assoc_data->link[i].bss) 8345 continue; 8346 if (i == assoc_data->assoc_link_id) 8347 continue; 8348 /* only calculate the mode, hence link == NULL */ 8349 err = ieee80211_prep_channel(sdata, NULL, i, 8350 assoc_data->link[i].bss, true, 8351 &assoc_data->link[i].conn); 8352 if (err) { 8353 req->links[i].error = err; 8354 goto err_clear; 8355 } 8356 } 8357 8358 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 8359 vif_cfg->ssid_len = assoc_data->ssid_len; 8360 8361 /* needed for transmitting the assoc frames properly */ 8362 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 8363 8364 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 8365 req->ap_mld_addr, true, 8366 &assoc_data->link[assoc_link_id].conn, 8367 override); 8368 if (err) 8369 goto err_clear; 8370 8371 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 8372 const struct cfg80211_bss_ies *beacon_ies; 8373 8374 rcu_read_lock(); 8375 beacon_ies = rcu_dereference(req->bss->beacon_ies); 8376 if (!beacon_ies) { 8377 /* 8378 * Wait up to one beacon interval ... 8379 * should this be more if we miss one? 8380 */ 8381 sdata_info(sdata, "waiting for beacon from %pM\n", 8382 link->u.mgd.bssid); 8383 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 8384 assoc_data->timeout_started = true; 8385 assoc_data->need_beacon = true; 8386 } 8387 rcu_read_unlock(); 8388 } 8389 8390 run_again(sdata, assoc_data->timeout); 8391 8392 /* We are associating, clean up auth_data */ 8393 if (ifmgd->auth_data) 8394 ieee80211_destroy_auth_data(sdata, true); 8395 8396 return 0; 8397 err_clear: 8398 if (!ifmgd->auth_data) { 8399 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8400 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8401 BSS_CHANGED_BSSID); 8402 } 8403 ifmgd->assoc_data = NULL; 8404 err_free: 8405 kfree(assoc_data); 8406 return err; 8407 } 8408 8409 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 8410 struct cfg80211_deauth_request *req) 8411 { 8412 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8413 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8414 bool tx = !req->local_state_change; 8415 struct ieee80211_prep_tx_info info = { 8416 .subtype = IEEE80211_STYPE_DEAUTH, 8417 }; 8418 8419 if (ifmgd->auth_data && 8420 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 8421 sdata_info(sdata, 8422 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 8423 req->bssid, req->reason_code, 8424 ieee80211_get_reason_code_string(req->reason_code)); 8425 8426 info.link_id = ifmgd->auth_data->link_id; 8427 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8428 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8429 IEEE80211_STYPE_DEAUTH, 8430 req->reason_code, tx, 8431 frame_buf); 8432 ieee80211_destroy_auth_data(sdata, false); 8433 ieee80211_report_disconnect(sdata, frame_buf, 8434 sizeof(frame_buf), true, 8435 req->reason_code, false); 8436 drv_mgd_complete_tx(sdata->local, sdata, &info); 8437 return 0; 8438 } 8439 8440 if (ifmgd->assoc_data && 8441 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 8442 sdata_info(sdata, 8443 "aborting association with %pM by local choice (Reason: %u=%s)\n", 8444 req->bssid, req->reason_code, 8445 ieee80211_get_reason_code_string(req->reason_code)); 8446 8447 info.link_id = ifmgd->assoc_data->assoc_link_id; 8448 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8449 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8450 IEEE80211_STYPE_DEAUTH, 8451 req->reason_code, tx, 8452 frame_buf); 8453 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8454 ieee80211_report_disconnect(sdata, frame_buf, 8455 sizeof(frame_buf), true, 8456 req->reason_code, false); 8457 drv_mgd_complete_tx(sdata->local, sdata, &info); 8458 return 0; 8459 } 8460 8461 if (ifmgd->associated && 8462 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 8463 sdata_info(sdata, 8464 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 8465 req->bssid, req->reason_code, 8466 ieee80211_get_reason_code_string(req->reason_code)); 8467 8468 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8469 req->reason_code, tx, frame_buf); 8470 ieee80211_report_disconnect(sdata, frame_buf, 8471 sizeof(frame_buf), true, 8472 req->reason_code, false); 8473 drv_mgd_complete_tx(sdata->local, sdata, &info); 8474 return 0; 8475 } 8476 8477 return -ENOTCONN; 8478 } 8479 8480 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 8481 struct cfg80211_disassoc_request *req) 8482 { 8483 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8484 8485 if (!sdata->u.mgd.associated || 8486 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 8487 return -ENOTCONN; 8488 8489 sdata_info(sdata, 8490 "disassociating from %pM by local choice (Reason: %u=%s)\n", 8491 req->ap_addr, req->reason_code, 8492 ieee80211_get_reason_code_string(req->reason_code)); 8493 8494 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 8495 req->reason_code, !req->local_state_change, 8496 frame_buf); 8497 8498 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8499 req->reason_code, false); 8500 8501 return 0; 8502 } 8503 8504 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 8505 { 8506 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8507 &link->u.mgd.request_smps_work); 8508 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8509 &link->u.mgd.recalc_smps); 8510 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 8511 &link->u.mgd.chswitch_work); 8512 } 8513 8514 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 8515 { 8516 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8517 8518 /* 8519 * Make sure some work items will not run after this, 8520 * they will not do anything but might not have been 8521 * cancelled when disconnecting. 8522 */ 8523 wiphy_work_cancel(sdata->local->hw.wiphy, 8524 &ifmgd->monitor_work); 8525 wiphy_work_cancel(sdata->local->hw.wiphy, 8526 &ifmgd->beacon_connection_loss_work); 8527 wiphy_work_cancel(sdata->local->hw.wiphy, 8528 &ifmgd->csa_connection_drop_work); 8529 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8530 &ifmgd->tdls_peer_del_work); 8531 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8532 &ifmgd->ml_reconf_work); 8533 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 8534 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8535 &ifmgd->neg_ttlm_timeout_work); 8536 8537 if (ifmgd->assoc_data) 8538 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8539 if (ifmgd->auth_data) 8540 ieee80211_destroy_auth_data(sdata, false); 8541 spin_lock_bh(&ifmgd->teardown_lock); 8542 if (ifmgd->teardown_skb) { 8543 kfree_skb(ifmgd->teardown_skb); 8544 ifmgd->teardown_skb = NULL; 8545 ifmgd->orig_teardown_skb = NULL; 8546 } 8547 kfree(ifmgd->assoc_req_ies); 8548 ifmgd->assoc_req_ies = NULL; 8549 ifmgd->assoc_req_ies_len = 0; 8550 spin_unlock_bh(&ifmgd->teardown_lock); 8551 del_timer_sync(&ifmgd->timer); 8552 } 8553 8554 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 8555 enum nl80211_cqm_rssi_threshold_event rssi_event, 8556 s32 rssi_level, 8557 gfp_t gfp) 8558 { 8559 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8560 8561 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 8562 8563 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 8564 } 8565 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 8566 8567 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 8568 { 8569 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8570 8571 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 8572 8573 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 8574 } 8575 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 8576 8577 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 8578 int rssi_min_thold, 8579 int rssi_max_thold) 8580 { 8581 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 8582 8583 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 8584 return; 8585 8586 /* 8587 * Scale up threshold values before storing it, as the RSSI averaging 8588 * algorithm uses a scaled up value as well. Change this scaling 8589 * factor if the RSSI averaging algorithm changes. 8590 */ 8591 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 8592 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 8593 } 8594 8595 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 8596 int rssi_min_thold, 8597 int rssi_max_thold) 8598 { 8599 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8600 8601 WARN_ON(rssi_min_thold == rssi_max_thold || 8602 rssi_min_thold > rssi_max_thold); 8603 8604 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 8605 rssi_max_thold); 8606 } 8607 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 8608 8609 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 8610 { 8611 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8612 8613 _ieee80211_enable_rssi_reports(sdata, 0, 0); 8614 } 8615 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 8616