1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2024 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 48 49 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 50 51 static int max_nullfunc_tries = 2; 52 module_param(max_nullfunc_tries, int, 0644); 53 MODULE_PARM_DESC(max_nullfunc_tries, 54 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 55 56 static int max_probe_tries = 5; 57 module_param(max_probe_tries, int, 0644); 58 MODULE_PARM_DESC(max_probe_tries, 59 "Maximum probe tries before disconnecting (reason 4)."); 60 61 /* 62 * Beacon loss timeout is calculated as N frames times the 63 * advertised beacon interval. This may need to be somewhat 64 * higher than what hardware might detect to account for 65 * delays in the host processing frames. But since we also 66 * probe on beacon miss before declaring the connection lost 67 * default to what we want. 68 */ 69 static int beacon_loss_count = 7; 70 module_param(beacon_loss_count, int, 0644); 71 MODULE_PARM_DESC(beacon_loss_count, 72 "Number of beacon intervals before we decide beacon was lost."); 73 74 /* 75 * Time the connection can be idle before we probe 76 * it to see if we can still talk to the AP. 77 */ 78 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 79 /* 80 * Time we wait for a probe response after sending 81 * a probe request because of beacon loss or for 82 * checking the connection still works. 83 */ 84 static int probe_wait_ms = 500; 85 module_param(probe_wait_ms, int, 0644); 86 MODULE_PARM_DESC(probe_wait_ms, 87 "Maximum time(ms) to wait for probe response" 88 " before disconnecting (reason 4)."); 89 90 /* 91 * How many Beacon frames need to have been used in average signal strength 92 * before starting to indicate signal change events. 93 */ 94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 95 96 /* 97 * We can have multiple work items (and connection probing) 98 * scheduling this timer, but we need to take care to only 99 * reschedule it when it should fire _earlier_ than it was 100 * asked for before, or if it's not pending right now. This 101 * function ensures that. Note that it then is required to 102 * run this function for all timeouts after the first one 103 * has happened -- the work that runs from this timer will 104 * do that. 105 */ 106 static void run_again(struct ieee80211_sub_if_data *sdata, 107 unsigned long timeout) 108 { 109 lockdep_assert_wiphy(sdata->local->hw.wiphy); 110 111 if (!timer_pending(&sdata->u.mgd.timer) || 112 time_before(timeout, sdata->u.mgd.timer.expires)) 113 mod_timer(&sdata->u.mgd.timer, timeout); 114 } 115 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 117 { 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 119 return; 120 121 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 122 return; 123 124 mod_timer(&sdata->u.mgd.bcn_mon_timer, 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 126 } 127 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 129 { 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 131 132 if (unlikely(!ifmgd->associated)) 133 return; 134 135 if (ifmgd->probe_send_count) 136 ifmgd->probe_send_count = 0; 137 138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 139 return; 140 141 mod_timer(&ifmgd->conn_mon_timer, 142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 143 } 144 145 static int ecw2cw(int ecw) 146 { 147 return (1 << ecw) - 1; 148 } 149 150 static enum ieee80211_conn_mode 151 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 152 struct ieee80211_channel *channel, 153 u32 vht_cap_info, 154 const struct ieee802_11_elems *elems, 155 bool ignore_ht_channel_mismatch, 156 const struct ieee80211_conn_settings *conn, 157 struct cfg80211_chan_def *chandef) 158 { 159 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 160 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 161 const struct ieee80211_he_operation *he_oper = elems->he_operation; 162 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 163 struct ieee80211_supported_band *sband = 164 sdata->local->hw.wiphy->bands[channel->band]; 165 struct cfg80211_chan_def vht_chandef; 166 bool no_vht = false; 167 u32 ht_cfreq; 168 169 *chandef = (struct cfg80211_chan_def) { 170 .chan = channel, 171 .width = NL80211_CHAN_WIDTH_20_NOHT, 172 .center_freq1 = channel->center_freq, 173 .freq1_offset = channel->freq_offset, 174 }; 175 176 /* get special S1G case out of the way */ 177 if (sband->band == NL80211_BAND_S1GHZ) { 178 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 179 sdata_info(sdata, 180 "Missing S1G Operation Element? Trying operating == primary\n"); 181 chandef->width = ieee80211_s1g_channel_width(channel); 182 } 183 184 return IEEE80211_CONN_MODE_S1G; 185 } 186 187 /* get special 6 GHz case out of the way */ 188 if (sband->band == NL80211_BAND_6GHZ) { 189 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 190 191 /* this is an error */ 192 if (conn->mode < IEEE80211_CONN_MODE_HE) 193 return IEEE80211_CONN_MODE_LEGACY; 194 195 if (!elems->he_6ghz_capa || !elems->he_cap) { 196 sdata_info(sdata, 197 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 198 return IEEE80211_CONN_MODE_LEGACY; 199 } 200 201 if (!eht_oper || !elems->eht_cap) { 202 eht_oper = NULL; 203 mode = IEEE80211_CONN_MODE_HE; 204 } 205 206 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 207 eht_oper, chandef)) { 208 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 209 return IEEE80211_CONN_MODE_LEGACY; 210 } 211 212 return mode; 213 } 214 215 /* now we have the progression HT, VHT, ... */ 216 if (conn->mode < IEEE80211_CONN_MODE_HT) 217 return IEEE80211_CONN_MODE_LEGACY; 218 219 if (!ht_oper || !elems->ht_cap_elem) 220 return IEEE80211_CONN_MODE_LEGACY; 221 222 chandef->width = NL80211_CHAN_WIDTH_20; 223 224 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 225 channel->band); 226 /* check that channel matches the right operating channel */ 227 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 228 /* 229 * It's possible that some APs are confused here; 230 * Netgear WNDR3700 sometimes reports 4 higher than 231 * the actual channel in association responses, but 232 * since we look at probe response/beacon data here 233 * it should be OK. 234 */ 235 sdata_info(sdata, 236 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 237 channel->center_freq, ht_cfreq, 238 ht_oper->primary_chan, channel->band); 239 return IEEE80211_CONN_MODE_LEGACY; 240 } 241 242 ieee80211_chandef_ht_oper(ht_oper, chandef); 243 244 if (conn->mode < IEEE80211_CONN_MODE_VHT) 245 return IEEE80211_CONN_MODE_HT; 246 247 vht_chandef = *chandef; 248 249 /* 250 * having he_cap/he_oper parsed out implies we're at 251 * least operating as HE STA 252 */ 253 if (elems->he_cap && he_oper && 254 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 255 struct ieee80211_vht_operation he_oper_vht_cap; 256 257 /* 258 * Set only first 3 bytes (other 2 aren't used in 259 * ieee80211_chandef_vht_oper() anyway) 260 */ 261 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 262 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 263 264 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 265 &he_oper_vht_cap, ht_oper, 266 &vht_chandef)) { 267 sdata_info(sdata, 268 "HE AP VHT information is invalid, disabling HE\n"); 269 /* this will cause us to re-parse as VHT STA */ 270 return IEEE80211_CONN_MODE_VHT; 271 } 272 } else if (!vht_oper || !elems->vht_cap_elem) { 273 if (sband->band == NL80211_BAND_5GHZ) { 274 sdata_info(sdata, 275 "VHT information is missing, disabling VHT\n"); 276 return IEEE80211_CONN_MODE_HT; 277 } 278 no_vht = true; 279 } else if (sband->band == NL80211_BAND_2GHZ) { 280 no_vht = true; 281 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 282 vht_cap_info, 283 vht_oper, ht_oper, 284 &vht_chandef)) { 285 sdata_info(sdata, 286 "AP VHT information is invalid, disabling VHT\n"); 287 return IEEE80211_CONN_MODE_HT; 288 } 289 290 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 291 sdata_info(sdata, 292 "AP VHT information doesn't match HT, disabling VHT\n"); 293 return IEEE80211_CONN_MODE_HT; 294 } 295 296 *chandef = vht_chandef; 297 298 /* stick to current max mode if we or the AP don't have HE */ 299 if (conn->mode < IEEE80211_CONN_MODE_HE || 300 !elems->he_operation || !elems->he_cap) { 301 if (no_vht) 302 return IEEE80211_CONN_MODE_HT; 303 return IEEE80211_CONN_MODE_VHT; 304 } 305 306 /* stick to HE if we or the AP don't have EHT */ 307 if (conn->mode < IEEE80211_CONN_MODE_EHT || 308 !eht_oper || !elems->eht_cap) 309 return IEEE80211_CONN_MODE_HE; 310 311 /* 312 * handle the case that the EHT operation indicates that it holds EHT 313 * operation information (in case that the channel width differs from 314 * the channel width reported in HT/VHT/HE). 315 */ 316 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 317 struct cfg80211_chan_def eht_chandef = *chandef; 318 319 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 320 &eht_chandef); 321 322 eht_chandef.punctured = 323 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 324 325 if (!cfg80211_chandef_valid(&eht_chandef)) { 326 sdata_info(sdata, 327 "AP EHT information is invalid, disabling EHT\n"); 328 return IEEE80211_CONN_MODE_HE; 329 } 330 331 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 332 sdata_info(sdata, 333 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 334 return IEEE80211_CONN_MODE_HE; 335 } 336 337 *chandef = eht_chandef; 338 } 339 340 return IEEE80211_CONN_MODE_EHT; 341 } 342 343 static bool 344 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 345 const struct ieee80211_he_cap_elem *he_cap, 346 const struct ieee80211_he_operation *he_op) 347 { 348 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 349 u16 mcs_80_map_tx, mcs_80_map_rx; 350 u16 ap_min_req_set; 351 int nss; 352 353 if (!he_cap) 354 return false; 355 356 /* mcs_nss is right after he_cap info */ 357 he_mcs_nss_supp = (void *)(he_cap + 1); 358 359 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 360 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 361 362 /* P802.11-REVme/D0.3 363 * 27.1.1 Introduction to the HE PHY 364 * ... 365 * An HE STA shall support the following features: 366 * ... 367 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 368 * supported channel widths for HE SU PPDUs 369 */ 370 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 371 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 372 sdata_info(sdata, 373 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 374 mcs_80_map_tx, mcs_80_map_rx); 375 return false; 376 } 377 378 if (!he_op) 379 return true; 380 381 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 382 383 /* 384 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 385 * zeroes, which is nonsense, and completely inconsistent with itself 386 * (it doesn't have 8 streams). Accept the settings in this case anyway. 387 */ 388 if (!ap_min_req_set) 389 return true; 390 391 /* make sure the AP is consistent with itself 392 * 393 * P802.11-REVme/D0.3 394 * 26.17.1 Basic HE BSS operation 395 * 396 * A STA that is operating in an HE BSS shall be able to receive and 397 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 398 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 399 * MLME-START.request primitive and shall be able to receive at each of 400 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 401 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 402 * primitive 403 */ 404 for (nss = 8; nss > 0; nss--) { 405 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 406 u8 ap_rx_val; 407 u8 ap_tx_val; 408 409 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 410 continue; 411 412 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 413 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 414 415 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 416 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 417 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 418 sdata_info(sdata, 419 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 420 nss, ap_rx_val, ap_rx_val, ap_op_val); 421 return false; 422 } 423 } 424 425 return true; 426 } 427 428 static bool 429 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 430 struct ieee80211_supported_band *sband, 431 const struct ieee80211_he_operation *he_op) 432 { 433 const struct ieee80211_sta_he_cap *sta_he_cap = 434 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 435 u16 ap_min_req_set; 436 int i; 437 438 if (!sta_he_cap || !he_op) 439 return false; 440 441 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 442 443 /* 444 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 445 * zeroes, which is nonsense, and completely inconsistent with itself 446 * (it doesn't have 8 streams). Accept the settings in this case anyway. 447 */ 448 if (!ap_min_req_set) 449 return true; 450 451 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 452 for (i = 0; i < 3; i++) { 453 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 454 &sta_he_cap->he_mcs_nss_supp; 455 u16 sta_mcs_map_rx = 456 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 457 u16 sta_mcs_map_tx = 458 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 459 u8 nss; 460 bool verified = true; 461 462 /* 463 * For each band there is a maximum of 8 spatial streams 464 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 465 * of 2 bits per NSS (1-8), with the values defined in enum 466 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 467 * capabilities aren't less than the AP's minimum requirements 468 * for this HE BSS per SS. 469 * It is enough to find one such band that meets the reqs. 470 */ 471 for (nss = 8; nss > 0; nss--) { 472 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 473 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 474 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 475 476 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 477 continue; 478 479 /* 480 * Make sure the HE AP doesn't require MCSs that aren't 481 * supported by the client as required by spec 482 * 483 * P802.11-REVme/D0.3 484 * 26.17.1 Basic HE BSS operation 485 * 486 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 487 * a BSS, unless it supports (i.e., is able to both transmit and 488 * receive using) all of the <HE-MCS, NSS> tuples in the basic 489 * HE-MCS and NSS set. 490 */ 491 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 492 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 493 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 494 verified = false; 495 break; 496 } 497 } 498 499 if (verified) 500 return true; 501 } 502 503 /* If here, STA doesn't meet AP's HE min requirements */ 504 return false; 505 } 506 507 static u8 508 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 509 const struct ieee80211_sta_eht_cap *sta_eht_cap, 510 unsigned int idx, int bw) 511 { 512 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 513 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 514 515 /* handle us being a 20 MHz-only EHT STA - with four values 516 * for MCS 0-7, 8-9, 10-11, 12-13. 517 */ 518 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 519 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 520 521 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 522 if (idx > 0) 523 idx--; 524 525 switch (bw) { 526 case 0: 527 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 528 case 1: 529 if (!(he_phy_cap0 & 530 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 531 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 532 return 0xff; /* pass check */ 533 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 534 case 2: 535 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 536 return 0xff; /* pass check */ 537 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 538 } 539 540 WARN_ON(1); 541 return 0; 542 } 543 544 static bool 545 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 546 struct ieee80211_supported_band *sband, 547 const struct ieee80211_eht_operation *eht_op) 548 { 549 const struct ieee80211_sta_he_cap *sta_he_cap = 550 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 551 const struct ieee80211_sta_eht_cap *sta_eht_cap = 552 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 553 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 554 unsigned int i; 555 556 if (!sta_he_cap || !sta_eht_cap || !eht_op) 557 return false; 558 559 req = &eht_op->basic_mcs_nss; 560 561 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 562 u8 req_rx_nss, req_tx_nss; 563 unsigned int bw; 564 565 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 566 IEEE80211_EHT_MCS_NSS_RX); 567 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 568 IEEE80211_EHT_MCS_NSS_TX); 569 570 for (bw = 0; bw < 3; bw++) { 571 u8 have, have_rx_nss, have_tx_nss; 572 573 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 574 sta_eht_cap, 575 i, bw); 576 have_rx_nss = u8_get_bits(have, 577 IEEE80211_EHT_MCS_NSS_RX); 578 have_tx_nss = u8_get_bits(have, 579 IEEE80211_EHT_MCS_NSS_TX); 580 581 if (req_rx_nss > have_rx_nss || 582 req_tx_nss > have_tx_nss) 583 return false; 584 } 585 } 586 587 return true; 588 } 589 590 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 591 const struct cfg80211_chan_def *chandef, 592 u32 prohibited_flags) 593 { 594 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 595 chandef, prohibited_flags)) 596 return false; 597 598 if (chandef->punctured && 599 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 600 return false; 601 602 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 603 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 604 return false; 605 606 return true; 607 } 608 609 static int ieee80211_chandef_num_subchans(const struct cfg80211_chan_def *c) 610 { 611 if (c->width == NL80211_CHAN_WIDTH_80P80) 612 return 4 + 4; 613 614 return nl80211_chan_width_to_mhz(c->width) / 20; 615 } 616 617 static int ieee80211_chandef_num_widths(const struct cfg80211_chan_def *c) 618 { 619 switch (c->width) { 620 case NL80211_CHAN_WIDTH_20: 621 case NL80211_CHAN_WIDTH_20_NOHT: 622 return 1; 623 case NL80211_CHAN_WIDTH_40: 624 return 2; 625 case NL80211_CHAN_WIDTH_80P80: 626 case NL80211_CHAN_WIDTH_80: 627 return 3; 628 case NL80211_CHAN_WIDTH_160: 629 return 4; 630 case NL80211_CHAN_WIDTH_320: 631 return 5; 632 default: 633 WARN_ON(1); 634 return 0; 635 } 636 } 637 638 VISIBLE_IF_MAC80211_KUNIT int 639 ieee80211_calc_chandef_subchan_offset(const struct cfg80211_chan_def *ap, 640 u8 n_partial_subchans) 641 { 642 int n = ieee80211_chandef_num_subchans(ap); 643 struct cfg80211_chan_def tmp = *ap; 644 int offset = 0; 645 646 /* 647 * Given a chandef (in this context, it's the AP's) and a number 648 * of subchannels that we want to look at ('n_partial_subchans'), 649 * calculate the offset in number of subchannels between the full 650 * and the subset with the desired width. 651 */ 652 653 /* same number of subchannels means no offset, obviously */ 654 if (n == n_partial_subchans) 655 return 0; 656 657 /* don't WARN - misconfigured APs could cause this if their N > width */ 658 if (n < n_partial_subchans) 659 return 0; 660 661 while (ieee80211_chandef_num_subchans(&tmp) > n_partial_subchans) { 662 u32 prev = tmp.center_freq1; 663 664 ieee80211_chandef_downgrade(&tmp, NULL); 665 666 /* 667 * if center_freq moved up, half the original channels 668 * are gone now but were below, so increase offset 669 */ 670 if (prev < tmp.center_freq1) 671 offset += ieee80211_chandef_num_subchans(&tmp); 672 } 673 674 /* 675 * 80+80 with secondary 80 below primary - four subchannels for it 676 * (we cannot downgrade *to* 80+80, so no need to consider 'tmp') 677 */ 678 if (ap->width == NL80211_CHAN_WIDTH_80P80 && 679 ap->center_freq2 < ap->center_freq1) 680 offset += 4; 681 682 return offset; 683 } 684 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_calc_chandef_subchan_offset); 685 686 VISIBLE_IF_MAC80211_KUNIT void 687 ieee80211_rearrange_tpe_psd(struct ieee80211_parsed_tpe_psd *psd, 688 const struct cfg80211_chan_def *ap, 689 const struct cfg80211_chan_def *used) 690 { 691 u8 needed = ieee80211_chandef_num_subchans(used); 692 u8 have = ieee80211_chandef_num_subchans(ap); 693 u8 tmp[IEEE80211_TPE_PSD_ENTRIES_320MHZ]; 694 u8 offset; 695 696 if (!psd->valid) 697 return; 698 699 /* if N is zero, all defaults were used, no point in rearranging */ 700 if (!psd->n) 701 goto out; 702 703 BUILD_BUG_ON(sizeof(tmp) != sizeof(psd->power)); 704 705 /* 706 * This assumes that 'N' is consistent with the HE channel, as 707 * it should be (otherwise the AP is broken). 708 * 709 * In psd->power we have values in the order 0..N, 0..K, where 710 * N+K should cover the entire channel per 'ap', but even if it 711 * doesn't then we've pre-filled 'unlimited' as defaults. 712 * 713 * But this is all the wrong order, we want to have them in the 714 * order of the 'used' channel. 715 * 716 * So for example, we could have a 320 MHz EHT AP, which has the 717 * HE channel as 80 MHz (e.g. due to puncturing, which doesn't 718 * seem to be considered for the TPE), as follows: 719 * 720 * EHT 320: | | | | | | | | | | | | | | | | | 721 * HE 80: | | | | | 722 * used 160: | | | | | | | | | 723 * 724 * N entries: |--|--|--|--| 725 * K entries: |--|--|--|--|--|--|--|--| |--|--|--|--| 726 * power idx: 4 5 6 7 8 9 10 11 0 1 2 3 12 13 14 15 727 * full chan: 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 728 * used chan: 0 1 2 3 4 5 6 7 729 * 730 * The idx in the power array ('power idx') is like this since it 731 * comes directly from the element's N and K entries in their 732 * element order, and those are this way for HE compatibility. 733 * 734 * Rearrange them as desired here, first by putting them into the 735 * 'full chan' order, and then selecting the necessary subset for 736 * the 'used chan'. 737 */ 738 739 /* first reorder according to AP channel */ 740 offset = ieee80211_calc_chandef_subchan_offset(ap, psd->n); 741 for (int i = 0; i < have; i++) { 742 if (i < offset) 743 tmp[i] = psd->power[i + psd->n]; 744 else if (i < offset + psd->n) 745 tmp[i] = psd->power[i - offset]; 746 else 747 tmp[i] = psd->power[i]; 748 } 749 750 /* 751 * and then select the subset for the used channel 752 * (set everything to defaults first in case a driver is confused) 753 */ 754 memset(psd->power, IEEE80211_TPE_PSD_NO_LIMIT, sizeof(psd->power)); 755 offset = ieee80211_calc_chandef_subchan_offset(ap, needed); 756 for (int i = 0; i < needed; i++) 757 psd->power[i] = tmp[offset + i]; 758 759 out: 760 /* limit, but don't lie if there are defaults in the data */ 761 if (needed < psd->count) 762 psd->count = needed; 763 } 764 EXPORT_SYMBOL_IF_MAC80211_KUNIT(ieee80211_rearrange_tpe_psd); 765 766 static void ieee80211_rearrange_tpe(struct ieee80211_parsed_tpe *tpe, 767 const struct cfg80211_chan_def *ap, 768 const struct cfg80211_chan_def *used) 769 { 770 /* ignore this completely for narrow/invalid channels */ 771 if (!ieee80211_chandef_num_subchans(ap) || 772 !ieee80211_chandef_num_subchans(used)) { 773 ieee80211_clear_tpe(tpe); 774 return; 775 } 776 777 for (int i = 0; i < 2; i++) { 778 int needed_pwr_count; 779 780 ieee80211_rearrange_tpe_psd(&tpe->psd_local[i], ap, used); 781 ieee80211_rearrange_tpe_psd(&tpe->psd_reg_client[i], ap, used); 782 783 /* limit this to the widths we actually need */ 784 needed_pwr_count = ieee80211_chandef_num_widths(used); 785 if (needed_pwr_count < tpe->max_local[i].count) 786 tpe->max_local[i].count = needed_pwr_count; 787 if (needed_pwr_count < tpe->max_reg_client[i].count) 788 tpe->max_reg_client[i].count = needed_pwr_count; 789 } 790 } 791 792 /* 793 * The AP part of the channel request is used to distinguish settings 794 * to the device used for wider bandwidth OFDMA. This is used in the 795 * channel context code to assign two channel contexts even if they're 796 * both for the same channel, if the AP bandwidths are incompatible. 797 * If not EHT (or driver override) then ap.chan == NULL indicates that 798 * there's no wider BW OFDMA used. 799 */ 800 static void ieee80211_set_chanreq_ap(struct ieee80211_sub_if_data *sdata, 801 struct ieee80211_chan_req *chanreq, 802 struct ieee80211_conn_settings *conn, 803 struct cfg80211_chan_def *ap_chandef) 804 { 805 chanreq->ap.chan = NULL; 806 807 if (conn->mode < IEEE80211_CONN_MODE_EHT) 808 return; 809 if (sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 810 return; 811 812 chanreq->ap = *ap_chandef; 813 } 814 815 static struct ieee802_11_elems * 816 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 817 struct ieee80211_conn_settings *conn, 818 struct cfg80211_bss *cbss, int link_id, 819 struct ieee80211_chan_req *chanreq, 820 struct cfg80211_chan_def *ap_chandef) 821 { 822 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 823 struct ieee80211_bss *bss = (void *)cbss->priv; 824 struct ieee80211_channel *channel = cbss->channel; 825 struct ieee80211_elems_parse_params parse_params = { 826 .link_id = -1, 827 .from_ap = true, 828 .start = ies->data, 829 .len = ies->len, 830 }; 831 struct ieee802_11_elems *elems; 832 struct ieee80211_supported_band *sband; 833 enum ieee80211_conn_mode ap_mode; 834 int ret; 835 836 again: 837 parse_params.mode = conn->mode; 838 elems = ieee802_11_parse_elems_full(&parse_params); 839 if (!elems) 840 return ERR_PTR(-ENOMEM); 841 842 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 843 elems, false, conn, ap_chandef); 844 845 /* this should be impossible since parsing depends on our mode */ 846 if (WARN_ON(ap_mode > conn->mode)) { 847 ret = -EINVAL; 848 goto free; 849 } 850 851 if (conn->mode != ap_mode) { 852 conn->mode = ap_mode; 853 kfree(elems); 854 goto again; 855 } 856 857 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 858 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 859 860 sband = sdata->local->hw.wiphy->bands[channel->band]; 861 862 switch (channel->band) { 863 case NL80211_BAND_S1GHZ: 864 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 865 ret = -EINVAL; 866 goto free; 867 } 868 return elems; 869 case NL80211_BAND_6GHZ: 870 if (ap_mode < IEEE80211_CONN_MODE_HE) { 871 sdata_info(sdata, 872 "Rejecting non-HE 6/7 GHz connection"); 873 ret = -EINVAL; 874 goto free; 875 } 876 break; 877 default: 878 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 879 ret = -EINVAL; 880 goto free; 881 } 882 } 883 884 switch (ap_mode) { 885 case IEEE80211_CONN_MODE_S1G: 886 WARN_ON(1); 887 ret = -EINVAL; 888 goto free; 889 case IEEE80211_CONN_MODE_LEGACY: 890 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 891 break; 892 case IEEE80211_CONN_MODE_HT: 893 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 894 conn->bw_limit, 895 IEEE80211_CONN_BW_LIMIT_40); 896 break; 897 case IEEE80211_CONN_MODE_VHT: 898 case IEEE80211_CONN_MODE_HE: 899 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 900 conn->bw_limit, 901 IEEE80211_CONN_BW_LIMIT_160); 902 break; 903 case IEEE80211_CONN_MODE_EHT: 904 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 905 conn->bw_limit, 906 IEEE80211_CONN_BW_LIMIT_320); 907 break; 908 } 909 910 chanreq->oper = *ap_chandef; 911 912 ieee80211_set_chanreq_ap(sdata, chanreq, conn, ap_chandef); 913 914 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 915 IEEE80211_CHAN_DISABLED)) { 916 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 917 ret = -EINVAL; 918 goto free; 919 } 920 921 ieee80211_chanreq_downgrade(chanreq, conn); 922 } 923 924 if (conn->mode >= IEEE80211_CONN_MODE_HE && 925 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 926 IEEE80211_CHAN_NO_HE)) { 927 conn->mode = IEEE80211_CONN_MODE_VHT; 928 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 929 conn->bw_limit, 930 IEEE80211_CONN_BW_LIMIT_160); 931 } 932 933 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 934 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 935 IEEE80211_CHAN_NO_EHT)) { 936 conn->mode = IEEE80211_CONN_MODE_HE; 937 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 938 conn->bw_limit, 939 IEEE80211_CONN_BW_LIMIT_160); 940 } 941 942 if (chanreq->oper.width != ap_chandef->width || ap_mode != conn->mode) 943 sdata_info(sdata, 944 "regulatory prevented using AP config, downgraded\n"); 945 946 if (conn->mode >= IEEE80211_CONN_MODE_HE && 947 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 948 elems->he_operation) || 949 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 950 elems->he_operation))) { 951 conn->mode = IEEE80211_CONN_MODE_VHT; 952 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 953 } 954 955 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 956 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 957 elems->eht_operation)) { 958 conn->mode = IEEE80211_CONN_MODE_HE; 959 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 960 conn->bw_limit, 961 IEEE80211_CONN_BW_LIMIT_160); 962 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 963 } 964 965 /* the mode can only decrease, so this must terminate */ 966 if (ap_mode != conn->mode) { 967 kfree(elems); 968 goto again; 969 } 970 971 mlme_link_id_dbg(sdata, link_id, 972 "connecting with %s mode, max bandwidth %d MHz\n", 973 ieee80211_conn_mode_str(conn->mode), 974 20 * (1 << conn->bw_limit)); 975 976 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 977 ret = -EINVAL; 978 goto free; 979 } 980 981 return elems; 982 free: 983 kfree(elems); 984 return ERR_PTR(ret); 985 } 986 987 static int ieee80211_config_bw(struct ieee80211_link_data *link, 988 struct ieee802_11_elems *elems, 989 bool update, u64 *changed) 990 { 991 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 992 struct ieee80211_sub_if_data *sdata = link->sdata; 993 struct ieee80211_chan_req chanreq = {}; 994 struct cfg80211_chan_def ap_chandef; 995 enum ieee80211_conn_mode ap_mode; 996 u32 vht_cap_info = 0; 997 u16 ht_opmode; 998 int ret; 999 1000 /* don't track any bandwidth changes in legacy/S1G modes */ 1001 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 1002 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 1003 return 0; 1004 1005 if (elems->vht_cap_elem) 1006 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 1007 1008 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 1009 elems, true, &link->u.mgd.conn, 1010 &ap_chandef); 1011 1012 if (ap_mode != link->u.mgd.conn.mode) { 1013 link_info(link, 1014 "AP appears to change mode (expected %s, found %s), disconnect\n", 1015 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 1016 ieee80211_conn_mode_str(ap_mode)); 1017 return -EINVAL; 1018 } 1019 1020 chanreq.oper = ap_chandef; 1021 ieee80211_set_chanreq_ap(sdata, &chanreq, &link->u.mgd.conn, 1022 &ap_chandef); 1023 1024 /* 1025 * if HT operation mode changed store the new one - 1026 * this may be applicable even if channel is identical 1027 */ 1028 if (elems->ht_operation) { 1029 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 1030 if (link->conf->ht_operation_mode != ht_opmode) { 1031 *changed |= BSS_CHANGED_HT; 1032 link->conf->ht_operation_mode = ht_opmode; 1033 } 1034 } 1035 1036 /* 1037 * Downgrade the new channel if we associated with restricted 1038 * bandwidth capabilities. For example, if we associated as a 1039 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 1040 * or config reasons) then switching to a 40 MHz channel now 1041 * won't do us any good -- we couldn't use it with the AP. 1042 */ 1043 while (link->u.mgd.conn.bw_limit < 1044 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 1045 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 1046 1047 if (ap_chandef.chan->band == NL80211_BAND_6GHZ && 1048 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 1049 ieee80211_rearrange_tpe(&elems->tpe, &ap_chandef, 1050 &chanreq.oper); 1051 if (memcmp(&link->conf->tpe, &elems->tpe, sizeof(elems->tpe))) { 1052 link->conf->tpe = elems->tpe; 1053 *changed |= BSS_CHANGED_TPE; 1054 } 1055 } 1056 1057 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 1058 return 0; 1059 1060 link_info(link, 1061 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 1062 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 1063 chanreq.oper.chan->freq_offset, chanreq.oper.width, 1064 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 1065 chanreq.oper.center_freq2); 1066 1067 if (!cfg80211_chandef_valid(&chanreq.oper)) { 1068 sdata_info(sdata, 1069 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 1070 link->u.mgd.bssid); 1071 return -EINVAL; 1072 } 1073 1074 if (!update) { 1075 link->conf->chanreq = chanreq; 1076 return 0; 1077 } 1078 1079 /* 1080 * We're tracking the current AP here, so don't do any further checks 1081 * here. This keeps us from playing ping-pong with regulatory, without 1082 * it the following can happen (for example): 1083 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 1084 * - AP advertises regdom US 1085 * - CRDA loads regdom US with 80 MHz prohibited (old database) 1086 * - we detect an unsupported channel and disconnect 1087 * - disconnect causes CRDA to reload world regdomain and the game 1088 * starts anew. 1089 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 1090 * 1091 * It seems possible that there are still scenarios with CSA or real 1092 * bandwidth changes where a this could happen, but those cases are 1093 * less common and wouldn't completely prevent using the AP. 1094 */ 1095 1096 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 1097 if (ret) { 1098 sdata_info(sdata, 1099 "AP %pM changed bandwidth to incompatible one - disconnect\n", 1100 link->u.mgd.bssid); 1101 return ret; 1102 } 1103 1104 cfg80211_schedule_channels_check(&sdata->wdev); 1105 return 0; 1106 } 1107 1108 /* frame sending functions */ 1109 1110 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 1111 struct sk_buff *skb, u8 ap_ht_param, 1112 struct ieee80211_supported_band *sband, 1113 struct ieee80211_channel *channel, 1114 enum ieee80211_smps_mode smps, 1115 const struct ieee80211_conn_settings *conn) 1116 { 1117 u8 *pos; 1118 u32 flags = channel->flags; 1119 u16 cap; 1120 struct ieee80211_sta_ht_cap ht_cap; 1121 1122 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 1123 1124 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 1125 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 1126 1127 /* determine capability flags */ 1128 cap = ht_cap.cap; 1129 1130 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 1131 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 1132 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 1133 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1134 cap &= ~IEEE80211_HT_CAP_SGI_40; 1135 } 1136 break; 1137 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 1138 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 1139 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1140 cap &= ~IEEE80211_HT_CAP_SGI_40; 1141 } 1142 break; 1143 } 1144 1145 /* 1146 * If 40 MHz was disabled associate as though we weren't 1147 * capable of 40 MHz -- some broken APs will never fall 1148 * back to trying to transmit in 20 MHz. 1149 */ 1150 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 1151 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 1152 cap &= ~IEEE80211_HT_CAP_SGI_40; 1153 } 1154 1155 /* set SM PS mode properly */ 1156 cap &= ~IEEE80211_HT_CAP_SM_PS; 1157 switch (smps) { 1158 case IEEE80211_SMPS_AUTOMATIC: 1159 case IEEE80211_SMPS_NUM_MODES: 1160 WARN_ON(1); 1161 fallthrough; 1162 case IEEE80211_SMPS_OFF: 1163 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 1164 IEEE80211_HT_CAP_SM_PS_SHIFT; 1165 break; 1166 case IEEE80211_SMPS_STATIC: 1167 cap |= WLAN_HT_CAP_SM_PS_STATIC << 1168 IEEE80211_HT_CAP_SM_PS_SHIFT; 1169 break; 1170 case IEEE80211_SMPS_DYNAMIC: 1171 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 1172 IEEE80211_HT_CAP_SM_PS_SHIFT; 1173 break; 1174 } 1175 1176 /* reserve and fill IE */ 1177 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 1178 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 1179 } 1180 1181 /* This function determines vht capability flags for the association 1182 * and builds the IE. 1183 * Note - the function returns true to own the MU-MIMO capability 1184 */ 1185 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 1186 struct sk_buff *skb, 1187 struct ieee80211_supported_band *sband, 1188 struct ieee80211_vht_cap *ap_vht_cap, 1189 const struct ieee80211_conn_settings *conn) 1190 { 1191 struct ieee80211_local *local = sdata->local; 1192 u8 *pos; 1193 u32 cap; 1194 struct ieee80211_sta_vht_cap vht_cap; 1195 u32 mask, ap_bf_sts, our_bf_sts; 1196 bool mu_mimo_owner = false; 1197 1198 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 1199 1200 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 1201 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 1202 1203 /* determine capability flags */ 1204 cap = vht_cap.cap; 1205 1206 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 1207 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 1208 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 1209 } 1210 1211 /* 1212 * Some APs apparently get confused if our capabilities are better 1213 * than theirs, so restrict what we advertise in the assoc request. 1214 */ 1215 if (!(ap_vht_cap->vht_cap_info & 1216 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1217 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1218 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1219 else if (!(ap_vht_cap->vht_cap_info & 1220 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1221 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1222 1223 /* 1224 * If some other vif is using the MU-MIMO capability we cannot associate 1225 * using MU-MIMO - this will lead to contradictions in the group-id 1226 * mechanism. 1227 * Ownership is defined since association request, in order to avoid 1228 * simultaneous associations with MU-MIMO. 1229 */ 1230 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1231 bool disable_mu_mimo = false; 1232 struct ieee80211_sub_if_data *other; 1233 1234 list_for_each_entry(other, &local->interfaces, list) { 1235 if (other->vif.bss_conf.mu_mimo_owner) { 1236 disable_mu_mimo = true; 1237 break; 1238 } 1239 } 1240 if (disable_mu_mimo) 1241 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1242 else 1243 mu_mimo_owner = true; 1244 } 1245 1246 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1247 1248 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1249 our_bf_sts = cap & mask; 1250 1251 if (ap_bf_sts < our_bf_sts) { 1252 cap &= ~mask; 1253 cap |= ap_bf_sts; 1254 } 1255 1256 /* reserve and fill IE */ 1257 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1258 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1259 1260 return mu_mimo_owner; 1261 } 1262 1263 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1264 enum nl80211_chan_width width, 1265 struct ieee80211_supported_band *sband, 1266 struct ieee80211_mgd_assoc_data *assoc_data) 1267 { 1268 u32 rates; 1269 1270 if (assoc_data->supp_rates_len) { 1271 /* 1272 * Get all rates supported by the device and the AP as 1273 * some APs don't like getting a superset of their rates 1274 * in the association request (e.g. D-Link DAP 1353 in 1275 * b-only mode)... 1276 */ 1277 ieee80211_parse_bitrates(width, sband, 1278 assoc_data->supp_rates, 1279 assoc_data->supp_rates_len, 1280 &rates); 1281 } else { 1282 /* 1283 * In case AP not provide any supported rates information 1284 * before association, we send information element(s) with 1285 * all rates that we support. 1286 */ 1287 rates = ~0; 1288 } 1289 1290 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1291 WLAN_EID_SUPP_RATES); 1292 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1293 WLAN_EID_EXT_SUPP_RATES); 1294 } 1295 1296 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1297 const u8 *elems, 1298 size_t elems_len, 1299 size_t offset) 1300 { 1301 size_t noffset; 1302 1303 static const u8 before_ht[] = { 1304 WLAN_EID_SSID, 1305 WLAN_EID_SUPP_RATES, 1306 WLAN_EID_EXT_SUPP_RATES, 1307 WLAN_EID_PWR_CAPABILITY, 1308 WLAN_EID_SUPPORTED_CHANNELS, 1309 WLAN_EID_RSN, 1310 WLAN_EID_QOS_CAPA, 1311 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1312 WLAN_EID_MOBILITY_DOMAIN, 1313 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1314 WLAN_EID_RIC_DATA, /* reassoc only */ 1315 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1316 }; 1317 static const u8 after_ric[] = { 1318 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1319 WLAN_EID_HT_CAPABILITY, 1320 WLAN_EID_BSS_COEX_2040, 1321 /* luckily this is almost always there */ 1322 WLAN_EID_EXT_CAPABILITY, 1323 WLAN_EID_QOS_TRAFFIC_CAPA, 1324 WLAN_EID_TIM_BCAST_REQ, 1325 WLAN_EID_INTERWORKING, 1326 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1327 WLAN_EID_VHT_CAPABILITY, 1328 WLAN_EID_OPMODE_NOTIF, 1329 }; 1330 1331 if (!elems_len) 1332 return offset; 1333 1334 noffset = ieee80211_ie_split_ric(elems, elems_len, 1335 before_ht, 1336 ARRAY_SIZE(before_ht), 1337 after_ric, 1338 ARRAY_SIZE(after_ric), 1339 offset); 1340 skb_put_data(skb, elems + offset, noffset - offset); 1341 1342 return noffset; 1343 } 1344 1345 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1346 const u8 *elems, 1347 size_t elems_len, 1348 size_t offset) 1349 { 1350 static const u8 before_vht[] = { 1351 /* 1352 * no need to list the ones split off before HT 1353 * or generated here 1354 */ 1355 WLAN_EID_BSS_COEX_2040, 1356 WLAN_EID_EXT_CAPABILITY, 1357 WLAN_EID_QOS_TRAFFIC_CAPA, 1358 WLAN_EID_TIM_BCAST_REQ, 1359 WLAN_EID_INTERWORKING, 1360 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1361 }; 1362 size_t noffset; 1363 1364 if (!elems_len) 1365 return offset; 1366 1367 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1368 noffset = ieee80211_ie_split(elems, elems_len, 1369 before_vht, ARRAY_SIZE(before_vht), 1370 offset); 1371 skb_put_data(skb, elems + offset, noffset - offset); 1372 1373 return noffset; 1374 } 1375 1376 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1377 const u8 *elems, 1378 size_t elems_len, 1379 size_t offset) 1380 { 1381 static const u8 before_he[] = { 1382 /* 1383 * no need to list the ones split off before VHT 1384 * or generated here 1385 */ 1386 WLAN_EID_OPMODE_NOTIF, 1387 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1388 /* 11ai elements */ 1389 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1390 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1391 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1392 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1393 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1394 /* TODO: add 11ah/11aj/11ak elements */ 1395 }; 1396 size_t noffset; 1397 1398 if (!elems_len) 1399 return offset; 1400 1401 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1402 noffset = ieee80211_ie_split(elems, elems_len, 1403 before_he, ARRAY_SIZE(before_he), 1404 offset); 1405 skb_put_data(skb, elems + offset, noffset - offset); 1406 1407 return noffset; 1408 } 1409 1410 #define PRESENT_ELEMS_MAX 8 1411 #define PRESENT_ELEM_EXT_OFFS 0x100 1412 1413 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1414 struct sk_buff *skb, u16 capab, 1415 const struct element *ext_capa, 1416 const u16 *present_elems); 1417 1418 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1419 struct sk_buff *skb, u16 *capab, 1420 const struct element *ext_capa, 1421 const u8 *extra_elems, 1422 size_t extra_elems_len, 1423 unsigned int link_id, 1424 struct ieee80211_link_data *link, 1425 u16 *present_elems) 1426 { 1427 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1428 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1429 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1430 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1431 struct ieee80211_channel *chan = cbss->channel; 1432 const struct ieee80211_sband_iftype_data *iftd; 1433 struct ieee80211_local *local = sdata->local; 1434 struct ieee80211_supported_band *sband; 1435 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1436 struct ieee80211_chanctx_conf *chanctx_conf; 1437 enum ieee80211_smps_mode smps_mode; 1438 u16 orig_capab = *capab; 1439 size_t offset = 0; 1440 int present_elems_len = 0; 1441 u8 *pos; 1442 int i; 1443 1444 #define ADD_PRESENT_ELEM(id) do { \ 1445 /* need a last for termination - we use 0 == SSID */ \ 1446 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1447 present_elems[present_elems_len++] = (id); \ 1448 } while (0) 1449 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1450 1451 if (link) 1452 smps_mode = link->smps_mode; 1453 else if (sdata->u.mgd.powersave) 1454 smps_mode = IEEE80211_SMPS_DYNAMIC; 1455 else 1456 smps_mode = IEEE80211_SMPS_OFF; 1457 1458 if (link) { 1459 /* 1460 * 5/10 MHz scenarios are only viable without MLO, in which 1461 * case this pointer should be used ... All of this is a bit 1462 * unclear though, not sure this even works at all. 1463 */ 1464 rcu_read_lock(); 1465 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1466 if (chanctx_conf) 1467 width = chanctx_conf->def.width; 1468 rcu_read_unlock(); 1469 } 1470 1471 sband = local->hw.wiphy->bands[chan->band]; 1472 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1473 1474 if (sband->band == NL80211_BAND_2GHZ) { 1475 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1476 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1477 } 1478 1479 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1480 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1481 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1482 1483 if (sband->band != NL80211_BAND_S1GHZ) 1484 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1485 1486 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1487 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1488 struct cfg80211_chan_def chandef = { 1489 .width = width, 1490 .chan = chan, 1491 }; 1492 1493 pos = skb_put(skb, 4); 1494 *pos++ = WLAN_EID_PWR_CAPABILITY; 1495 *pos++ = 2; 1496 *pos++ = 0; /* min tx power */ 1497 /* max tx power */ 1498 *pos++ = ieee80211_chandef_max_power(&chandef); 1499 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1500 } 1501 1502 /* 1503 * Per spec, we shouldn't include the list of channels if we advertise 1504 * support for extended channel switching, but we've always done that; 1505 * (for now?) apply this restriction only on the (new) 6 GHz band. 1506 */ 1507 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1508 (sband->band != NL80211_BAND_6GHZ || 1509 !ext_capa || ext_capa->datalen < 1 || 1510 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1511 /* TODO: get this in reg domain format */ 1512 pos = skb_put(skb, 2 * sband->n_channels + 2); 1513 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1514 *pos++ = 2 * sband->n_channels; 1515 for (i = 0; i < sband->n_channels; i++) { 1516 int cf = sband->channels[i].center_freq; 1517 1518 *pos++ = ieee80211_frequency_to_channel(cf); 1519 *pos++ = 1; /* one channel in the subband*/ 1520 } 1521 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1522 } 1523 1524 /* if present, add any custom IEs that go before HT */ 1525 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1526 extra_elems_len, 1527 offset); 1528 1529 if (sband->band != NL80211_BAND_6GHZ && 1530 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1531 ieee80211_add_ht_ie(sdata, skb, 1532 assoc_data->link[link_id].ap_ht_param, 1533 sband, chan, smps_mode, 1534 &assoc_data->link[link_id].conn); 1535 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1536 } 1537 1538 /* if present, add any custom IEs that go before VHT */ 1539 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1540 extra_elems_len, 1541 offset); 1542 1543 if (sband->band != NL80211_BAND_6GHZ && 1544 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1545 sband->vht_cap.vht_supported) { 1546 bool mu_mimo_owner = 1547 ieee80211_add_vht_ie(sdata, skb, sband, 1548 &assoc_data->link[link_id].ap_vht_cap, 1549 &assoc_data->link[link_id].conn); 1550 1551 if (link) 1552 link->conf->mu_mimo_owner = mu_mimo_owner; 1553 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1554 } 1555 1556 /* if present, add any custom IEs that go before HE */ 1557 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1558 extra_elems_len, 1559 offset); 1560 1561 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1562 ieee80211_put_he_cap(skb, sdata, sband, 1563 &assoc_data->link[link_id].conn); 1564 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1565 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1566 } 1567 1568 /* 1569 * careful - need to know about all the present elems before 1570 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1571 * we're going to put it after the ML element 1572 */ 1573 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1574 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1575 1576 if (link_id == assoc_data->assoc_link_id) 1577 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1578 present_elems); 1579 1580 /* crash if somebody gets it wrong */ 1581 present_elems = NULL; 1582 1583 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1584 ieee80211_put_eht_cap(skb, sdata, sband, 1585 &assoc_data->link[link_id].conn); 1586 1587 if (sband->band == NL80211_BAND_S1GHZ) { 1588 ieee80211_add_aid_request_ie(sdata, skb); 1589 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1590 } 1591 1592 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1593 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1594 1595 return offset; 1596 } 1597 1598 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1599 const u16 *outer, 1600 const u16 *inner) 1601 { 1602 unsigned int skb_len = skb->len; 1603 bool at_extension = false; 1604 bool added = false; 1605 int i, j; 1606 u8 *len, *list_len = NULL; 1607 1608 skb_put_u8(skb, WLAN_EID_EXTENSION); 1609 len = skb_put(skb, 1); 1610 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1611 1612 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1613 u16 elem = outer[i]; 1614 bool have_inner = false; 1615 1616 /* should at least be sorted in the sense of normal -> ext */ 1617 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1618 1619 /* switch to extension list */ 1620 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1621 at_extension = true; 1622 if (!list_len) 1623 skb_put_u8(skb, 0); 1624 list_len = NULL; 1625 } 1626 1627 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1628 if (elem == inner[j]) { 1629 have_inner = true; 1630 break; 1631 } 1632 } 1633 1634 if (have_inner) 1635 continue; 1636 1637 if (!list_len) { 1638 list_len = skb_put(skb, 1); 1639 *list_len = 0; 1640 } 1641 *list_len += 1; 1642 skb_put_u8(skb, (u8)elem); 1643 added = true; 1644 } 1645 1646 /* if we added a list but no extension list, make a zero-len one */ 1647 if (added && (!at_extension || !list_len)) 1648 skb_put_u8(skb, 0); 1649 1650 /* if nothing added remove extension element completely */ 1651 if (!added) 1652 skb_trim(skb, skb_len); 1653 else 1654 *len = skb->len - skb_len - 2; 1655 } 1656 1657 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1658 struct sk_buff *skb, u16 capab, 1659 const struct element *ext_capa, 1660 const u16 *outer_present_elems) 1661 { 1662 struct ieee80211_local *local = sdata->local; 1663 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1664 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1665 struct ieee80211_multi_link_elem *ml_elem; 1666 struct ieee80211_mle_basic_common_info *common; 1667 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1668 __le16 eml_capa = 0, mld_capa_ops = 0; 1669 unsigned int link_id; 1670 u8 *ml_elem_len; 1671 void *capab_pos; 1672 1673 if (!ieee80211_vif_is_mld(&sdata->vif)) 1674 return; 1675 1676 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1677 ieee80211_vif_type_p2p(&sdata->vif)); 1678 if (ift_ext_capa) { 1679 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1680 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1681 } 1682 1683 skb_put_u8(skb, WLAN_EID_EXTENSION); 1684 ml_elem_len = skb_put(skb, 1); 1685 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1686 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1687 ml_elem->control = 1688 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1689 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1690 common = skb_put(skb, sizeof(*common)); 1691 common->len = sizeof(*common) + 1692 2; /* MLD capa/ops */ 1693 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1694 1695 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1696 if (eml_capa & 1697 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1698 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1699 common->len += 2; /* EML capabilities */ 1700 ml_elem->control |= 1701 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1702 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1703 } 1704 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1705 1706 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1707 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1708 const u8 *extra_elems; 1709 size_t extra_elems_len; 1710 size_t extra_used; 1711 u8 *subelem_len = NULL; 1712 __le16 ctrl; 1713 1714 if (!assoc_data->link[link_id].bss || 1715 link_id == assoc_data->assoc_link_id) 1716 continue; 1717 1718 extra_elems = assoc_data->link[link_id].elems; 1719 extra_elems_len = assoc_data->link[link_id].elems_len; 1720 1721 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1722 subelem_len = skb_put(skb, 1); 1723 1724 ctrl = cpu_to_le16(link_id | 1725 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1726 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1727 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1728 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1729 skb_put_data(skb, assoc_data->link[link_id].addr, 1730 ETH_ALEN); 1731 /* 1732 * Now add the contents of the (re)association request, 1733 * but the "listen interval" and "current AP address" 1734 * (if applicable) are skipped. So we only have 1735 * the capability field (remember the position and fill 1736 * later), followed by the elements added below by 1737 * calling ieee80211_assoc_link_elems(). 1738 */ 1739 capab_pos = skb_put(skb, 2); 1740 1741 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1742 ext_capa, 1743 extra_elems, 1744 extra_elems_len, 1745 link_id, NULL, 1746 link_present_elems); 1747 if (extra_elems) 1748 skb_put_data(skb, extra_elems + extra_used, 1749 extra_elems_len - extra_used); 1750 1751 put_unaligned_le16(capab, capab_pos); 1752 1753 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1754 link_present_elems); 1755 1756 ieee80211_fragment_element(skb, subelem_len, 1757 IEEE80211_MLE_SUBELEM_FRAGMENT); 1758 } 1759 1760 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1761 } 1762 1763 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1764 { 1765 struct ieee80211_local *local = sdata->local; 1766 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1767 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1768 struct ieee80211_link_data *link; 1769 struct sk_buff *skb; 1770 struct ieee80211_mgmt *mgmt; 1771 u8 *pos, qos_info, *ie_start; 1772 size_t offset, noffset; 1773 u16 capab = 0, link_capab; 1774 __le16 listen_int; 1775 struct element *ext_capa = NULL; 1776 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1777 struct ieee80211_prep_tx_info info = {}; 1778 unsigned int link_id, n_links = 0; 1779 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1780 void *capab_pos; 1781 size_t size; 1782 int ret; 1783 1784 /* we know it's writable, cast away the const */ 1785 if (assoc_data->ie_len) 1786 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1787 assoc_data->ie, 1788 assoc_data->ie_len); 1789 1790 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1791 1792 size = local->hw.extra_tx_headroom + 1793 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1794 2 + assoc_data->ssid_len + /* SSID */ 1795 assoc_data->ie_len + /* extra IEs */ 1796 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1797 9; /* WMM */ 1798 1799 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1800 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1801 const struct ieee80211_sband_iftype_data *iftd; 1802 struct ieee80211_supported_band *sband; 1803 1804 if (!cbss) 1805 continue; 1806 1807 sband = local->hw.wiphy->bands[cbss->channel->band]; 1808 1809 n_links++; 1810 /* add STA profile elements length */ 1811 size += assoc_data->link[link_id].elems_len; 1812 /* and supported rates length */ 1813 size += 4 + sband->n_bitrates; 1814 /* supported channels */ 1815 size += 2 + 2 * sband->n_channels; 1816 1817 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1818 if (iftd) 1819 size += iftd->vendor_elems.len; 1820 1821 /* power capability */ 1822 size += 4; 1823 1824 /* HT, VHT, HE, EHT */ 1825 size += 2 + sizeof(struct ieee80211_ht_cap); 1826 size += 2 + sizeof(struct ieee80211_vht_cap); 1827 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1828 sizeof(struct ieee80211_he_mcs_nss_supp) + 1829 IEEE80211_HE_PPE_THRES_MAX_LEN; 1830 1831 if (sband->band == NL80211_BAND_6GHZ) 1832 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1833 1834 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1835 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1836 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1837 1838 /* non-inheritance element */ 1839 size += 2 + 2 + PRESENT_ELEMS_MAX; 1840 1841 /* should be the same across all BSSes */ 1842 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1843 capab |= WLAN_CAPABILITY_PRIVACY; 1844 } 1845 1846 if (ieee80211_vif_is_mld(&sdata->vif)) { 1847 /* consider the multi-link element with STA profile */ 1848 size += sizeof(struct ieee80211_multi_link_elem); 1849 /* max common info field in basic multi-link element */ 1850 size += sizeof(struct ieee80211_mle_basic_common_info) + 1851 2 + /* capa & op */ 1852 2; /* EML capa */ 1853 1854 /* 1855 * The capability elements were already considered above; 1856 * note this over-estimates a bit because there's no 1857 * STA profile for the assoc link. 1858 */ 1859 size += (n_links - 1) * 1860 (1 + 1 + /* subelement ID/length */ 1861 2 + /* STA control */ 1862 1 + ETH_ALEN + 2 /* STA Info field */); 1863 } 1864 1865 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1866 if (WARN_ON(!link)) 1867 return -EINVAL; 1868 1869 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1870 return -EINVAL; 1871 1872 skb = alloc_skb(size, GFP_KERNEL); 1873 if (!skb) 1874 return -ENOMEM; 1875 1876 skb_reserve(skb, local->hw.extra_tx_headroom); 1877 1878 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1879 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1880 1881 /* Set MBSSID support for HE AP if needed */ 1882 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1883 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1884 ext_capa && ext_capa->datalen >= 3) 1885 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1886 1887 mgmt = skb_put_zero(skb, 24); 1888 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1889 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1890 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1891 1892 listen_int = cpu_to_le16(assoc_data->s1g ? 1893 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1894 local->hw.conf.listen_interval); 1895 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1896 skb_put(skb, 10); 1897 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1898 IEEE80211_STYPE_REASSOC_REQ); 1899 capab_pos = &mgmt->u.reassoc_req.capab_info; 1900 mgmt->u.reassoc_req.listen_interval = listen_int; 1901 memcpy(mgmt->u.reassoc_req.current_ap, 1902 assoc_data->prev_ap_addr, ETH_ALEN); 1903 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1904 } else { 1905 skb_put(skb, 4); 1906 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1907 IEEE80211_STYPE_ASSOC_REQ); 1908 capab_pos = &mgmt->u.assoc_req.capab_info; 1909 mgmt->u.assoc_req.listen_interval = listen_int; 1910 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1911 } 1912 1913 /* SSID */ 1914 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1915 ie_start = pos; 1916 *pos++ = WLAN_EID_SSID; 1917 *pos++ = assoc_data->ssid_len; 1918 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1919 1920 /* 1921 * This bit is technically reserved, so it shouldn't matter for either 1922 * the AP or us, but it also means we shouldn't set it. However, we've 1923 * always set it in the past, and apparently some EHT APs check that 1924 * we don't set it. To avoid interoperability issues with old APs that 1925 * for some reason check it and want it to be set, set the bit for all 1926 * pre-EHT connections as we used to do. 1927 */ 1928 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1929 capab |= WLAN_CAPABILITY_ESS; 1930 1931 /* add the elements for the assoc (main) link */ 1932 link_capab = capab; 1933 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1934 ext_capa, 1935 assoc_data->ie, 1936 assoc_data->ie_len, 1937 assoc_data->assoc_link_id, link, 1938 present_elems); 1939 put_unaligned_le16(link_capab, capab_pos); 1940 1941 /* if present, add any custom non-vendor IEs */ 1942 if (assoc_data->ie_len) { 1943 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1944 assoc_data->ie_len, 1945 offset); 1946 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1947 offset = noffset; 1948 } 1949 1950 if (assoc_data->wmm) { 1951 if (assoc_data->uapsd) { 1952 qos_info = ifmgd->uapsd_queues; 1953 qos_info |= (ifmgd->uapsd_max_sp_len << 1954 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1955 } else { 1956 qos_info = 0; 1957 } 1958 1959 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1960 } 1961 1962 /* add any remaining custom (i.e. vendor specific here) IEs */ 1963 if (assoc_data->ie_len) { 1964 noffset = assoc_data->ie_len; 1965 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1966 } 1967 1968 if (assoc_data->fils_kek_len) { 1969 ret = fils_encrypt_assoc_req(skb, assoc_data); 1970 if (ret < 0) { 1971 dev_kfree_skb(skb); 1972 return ret; 1973 } 1974 } 1975 1976 pos = skb_tail_pointer(skb); 1977 kfree(ifmgd->assoc_req_ies); 1978 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1979 if (!ifmgd->assoc_req_ies) { 1980 dev_kfree_skb(skb); 1981 return -ENOMEM; 1982 } 1983 1984 ifmgd->assoc_req_ies_len = pos - ie_start; 1985 1986 info.link_id = assoc_data->assoc_link_id; 1987 drv_mgd_prepare_tx(local, sdata, &info); 1988 1989 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1990 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1991 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1992 IEEE80211_TX_INTFL_MLME_CONN_TX; 1993 ieee80211_tx_skb(sdata, skb); 1994 1995 return 0; 1996 } 1997 1998 void ieee80211_send_pspoll(struct ieee80211_local *local, 1999 struct ieee80211_sub_if_data *sdata) 2000 { 2001 struct ieee80211_pspoll *pspoll; 2002 struct sk_buff *skb; 2003 2004 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 2005 if (!skb) 2006 return; 2007 2008 pspoll = (struct ieee80211_pspoll *) skb->data; 2009 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2010 2011 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2012 ieee80211_tx_skb(sdata, skb); 2013 } 2014 2015 void ieee80211_send_nullfunc(struct ieee80211_local *local, 2016 struct ieee80211_sub_if_data *sdata, 2017 bool powersave) 2018 { 2019 struct sk_buff *skb; 2020 struct ieee80211_hdr_3addr *nullfunc; 2021 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2022 2023 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 2024 !ieee80211_hw_check(&local->hw, 2025 DOESNT_SUPPORT_QOS_NDP)); 2026 if (!skb) 2027 return; 2028 2029 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 2030 if (powersave) 2031 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 2032 2033 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 2034 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 2035 2036 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2037 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 2038 2039 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 2040 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2041 2042 ieee80211_tx_skb(sdata, skb); 2043 } 2044 2045 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 2046 struct ieee80211_sub_if_data *sdata) 2047 { 2048 struct sk_buff *skb; 2049 struct ieee80211_hdr *nullfunc; 2050 __le16 fc; 2051 2052 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 2053 return; 2054 2055 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 2056 if (!skb) 2057 return; 2058 2059 skb_reserve(skb, local->hw.extra_tx_headroom); 2060 2061 nullfunc = skb_put_zero(skb, 30); 2062 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 2063 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 2064 nullfunc->frame_control = fc; 2065 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2066 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 2067 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 2068 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 2069 2070 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 2071 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 2072 ieee80211_tx_skb(sdata, skb); 2073 } 2074 2075 /* spectrum management related things */ 2076 static void ieee80211_csa_switch_work(struct wiphy *wiphy, 2077 struct wiphy_work *work) 2078 { 2079 struct ieee80211_link_data *link = 2080 container_of(work, struct ieee80211_link_data, 2081 u.mgd.csa.switch_work.work); 2082 struct ieee80211_sub_if_data *sdata = link->sdata; 2083 struct ieee80211_local *local = sdata->local; 2084 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2085 int ret; 2086 2087 if (!ieee80211_sdata_running(sdata)) 2088 return; 2089 2090 lockdep_assert_wiphy(local->hw.wiphy); 2091 2092 if (!ifmgd->associated) 2093 return; 2094 2095 if (!link->conf->csa_active) 2096 return; 2097 2098 /* 2099 * If the link isn't active (now), we cannot wait for beacons, won't 2100 * have a reserved chanctx, etc. Just switch over the chandef and 2101 * update cfg80211 directly. 2102 */ 2103 if (!ieee80211_vif_link_active(&sdata->vif, link->link_id)) { 2104 link->conf->chanreq = link->csa.chanreq; 2105 cfg80211_ch_switch_notify(sdata->dev, &link->csa.chanreq.oper, 2106 link->link_id); 2107 return; 2108 } 2109 2110 /* 2111 * using reservation isn't immediate as it may be deferred until later 2112 * with multi-vif. once reservation is complete it will re-schedule the 2113 * work with no reserved_chanctx so verify chandef to check if it 2114 * completed successfully 2115 */ 2116 2117 if (link->reserved_chanctx) { 2118 /* 2119 * with multi-vif csa driver may call ieee80211_csa_finish() 2120 * many times while waiting for other interfaces to use their 2121 * reservations 2122 */ 2123 if (link->reserved_ready) 2124 return; 2125 2126 ret = ieee80211_link_use_reserved_context(link); 2127 if (ret) { 2128 link_info(link, 2129 "failed to use reserved channel context, disconnecting (err=%d)\n", 2130 ret); 2131 wiphy_work_queue(sdata->local->hw.wiphy, 2132 &ifmgd->csa_connection_drop_work); 2133 } 2134 return; 2135 } 2136 2137 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 2138 &link->csa.chanreq)) { 2139 link_info(link, 2140 "failed to finalize channel switch, disconnecting\n"); 2141 wiphy_work_queue(sdata->local->hw.wiphy, 2142 &ifmgd->csa_connection_drop_work); 2143 return; 2144 } 2145 2146 link->u.mgd.csa.waiting_bcn = true; 2147 2148 /* apply new TPE restrictions immediately on the new channel */ 2149 if (link->u.mgd.csa.ap_chandef.chan->band == NL80211_BAND_6GHZ && 2150 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE) { 2151 ieee80211_rearrange_tpe(&link->u.mgd.csa.tpe, 2152 &link->u.mgd.csa.ap_chandef, 2153 &link->conf->chanreq.oper); 2154 if (memcmp(&link->conf->tpe, &link->u.mgd.csa.tpe, 2155 sizeof(link->u.mgd.csa.tpe))) { 2156 link->conf->tpe = link->u.mgd.csa.tpe; 2157 ieee80211_link_info_change_notify(sdata, link, 2158 BSS_CHANGED_TPE); 2159 } 2160 } 2161 2162 ieee80211_sta_reset_beacon_monitor(sdata); 2163 ieee80211_sta_reset_conn_monitor(sdata); 2164 } 2165 2166 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 2167 { 2168 struct ieee80211_sub_if_data *sdata = link->sdata; 2169 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2170 int ret; 2171 2172 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2173 2174 WARN_ON(!link->conf->csa_active); 2175 2176 ieee80211_vif_unblock_queues_csa(sdata); 2177 2178 link->conf->csa_active = false; 2179 link->u.mgd.csa.blocked_tx = false; 2180 link->u.mgd.csa.waiting_bcn = false; 2181 2182 ret = drv_post_channel_switch(link); 2183 if (ret) { 2184 link_info(link, 2185 "driver post channel switch failed, disconnecting\n"); 2186 wiphy_work_queue(sdata->local->hw.wiphy, 2187 &ifmgd->csa_connection_drop_work); 2188 return; 2189 } 2190 2191 cfg80211_ch_switch_notify(sdata->dev, &link->conf->chanreq.oper, 2192 link->link_id); 2193 } 2194 2195 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 2196 unsigned int link_id) 2197 { 2198 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 2199 2200 trace_api_chswitch_done(sdata, success, link_id); 2201 2202 rcu_read_lock(); 2203 2204 if (!success) { 2205 sdata_info(sdata, 2206 "driver channel switch failed (link %d), disconnecting\n", 2207 link_id); 2208 wiphy_work_queue(sdata->local->hw.wiphy, 2209 &sdata->u.mgd.csa_connection_drop_work); 2210 } else { 2211 struct ieee80211_link_data *link = 2212 rcu_dereference(sdata->link[link_id]); 2213 2214 if (WARN_ON(!link)) { 2215 rcu_read_unlock(); 2216 return; 2217 } 2218 2219 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 2220 &link->u.mgd.csa.switch_work, 0); 2221 } 2222 2223 rcu_read_unlock(); 2224 } 2225 EXPORT_SYMBOL(ieee80211_chswitch_done); 2226 2227 static void 2228 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 2229 { 2230 struct ieee80211_sub_if_data *sdata = link->sdata; 2231 struct ieee80211_local *local = sdata->local; 2232 2233 lockdep_assert_wiphy(local->hw.wiphy); 2234 2235 if (!local->ops->abort_channel_switch) 2236 return; 2237 2238 ieee80211_link_unreserve_chanctx(link); 2239 2240 ieee80211_vif_unblock_queues_csa(sdata); 2241 2242 link->conf->csa_active = false; 2243 link->u.mgd.csa.blocked_tx = false; 2244 2245 drv_abort_channel_switch(link); 2246 } 2247 2248 struct sta_csa_rnr_iter_data { 2249 struct ieee80211_link_data *link; 2250 struct ieee80211_channel *chan; 2251 u8 mld_id; 2252 }; 2253 2254 static enum cfg80211_rnr_iter_ret 2255 ieee80211_sta_csa_rnr_iter(void *_data, u8 type, 2256 const struct ieee80211_neighbor_ap_info *info, 2257 const u8 *tbtt_info, u8 tbtt_info_len) 2258 { 2259 struct sta_csa_rnr_iter_data *data = _data; 2260 struct ieee80211_link_data *link = data->link; 2261 struct ieee80211_sub_if_data *sdata = link->sdata; 2262 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2263 const struct ieee80211_tbtt_info_ge_11 *ti; 2264 enum nl80211_band band; 2265 unsigned int center_freq; 2266 int link_id; 2267 2268 if (type != IEEE80211_TBTT_INFO_TYPE_TBTT) 2269 return RNR_ITER_CONTINUE; 2270 2271 if (tbtt_info_len < sizeof(*ti)) 2272 return RNR_ITER_CONTINUE; 2273 2274 ti = (const void *)tbtt_info; 2275 2276 if (ti->mld_params.mld_id != data->mld_id) 2277 return RNR_ITER_CONTINUE; 2278 2279 link_id = le16_get_bits(ti->mld_params.params, 2280 IEEE80211_RNR_MLD_PARAMS_LINK_ID); 2281 if (link_id != data->link->link_id) 2282 return RNR_ITER_CONTINUE; 2283 2284 /* we found the entry for our link! */ 2285 2286 /* this AP is confused, it had this right before ... just disconnect */ 2287 if (!ieee80211_operating_class_to_band(info->op_class, &band)) { 2288 link_info(link, 2289 "AP now has invalid operating class in RNR, disconnect\n"); 2290 wiphy_work_queue(sdata->local->hw.wiphy, 2291 &ifmgd->csa_connection_drop_work); 2292 return RNR_ITER_BREAK; 2293 } 2294 2295 center_freq = ieee80211_channel_to_frequency(info->channel, band); 2296 data->chan = ieee80211_get_channel(sdata->local->hw.wiphy, center_freq); 2297 2298 return RNR_ITER_BREAK; 2299 } 2300 2301 static void 2302 ieee80211_sta_other_link_csa_disappeared(struct ieee80211_link_data *link, 2303 struct ieee802_11_elems *elems) 2304 { 2305 struct ieee80211_sub_if_data *sdata = link->sdata; 2306 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2307 struct sta_csa_rnr_iter_data data = { 2308 .link = link, 2309 }; 2310 2311 /* 2312 * If we get here, we see a beacon from another link without 2313 * CSA still being reported for it, so now we have to check 2314 * if the CSA was aborted or completed. This may not even be 2315 * perfectly possible if the CSA was only done for changing 2316 * the puncturing, but in that case if the link in inactive 2317 * we don't really care, and if it's an active link (or when 2318 * it's activated later) we'll get a beacon and adjust. 2319 */ 2320 2321 if (WARN_ON(!elems->ml_basic)) 2322 return; 2323 2324 data.mld_id = ieee80211_mle_get_mld_id((const void *)elems->ml_basic); 2325 2326 /* 2327 * So in order to do this, iterate the RNR element(s) and see 2328 * what channel is reported now. 2329 */ 2330 cfg80211_iter_rnr(elems->ie_start, elems->total_len, 2331 ieee80211_sta_csa_rnr_iter, &data); 2332 2333 if (!data.chan) { 2334 link_info(link, 2335 "couldn't find (valid) channel in RNR for CSA, disconnect\n"); 2336 wiphy_work_queue(sdata->local->hw.wiphy, 2337 &ifmgd->csa_connection_drop_work); 2338 return; 2339 } 2340 2341 /* 2342 * If it doesn't match the CSA, then assume it aborted. This 2343 * may erroneously detect that it was _not_ aborted when it 2344 * was in fact aborted, but only changed the bandwidth or the 2345 * puncturing configuration, but we don't have enough data to 2346 * detect that. 2347 */ 2348 if (data.chan != link->csa.chanreq.oper.chan) 2349 ieee80211_sta_abort_chanswitch(link); 2350 } 2351 2352 enum ieee80211_csa_source { 2353 IEEE80211_CSA_SOURCE_BEACON, 2354 IEEE80211_CSA_SOURCE_OTHER_LINK, 2355 IEEE80211_CSA_SOURCE_PROT_ACTION, 2356 IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2357 }; 2358 2359 static void 2360 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2361 u64 timestamp, u32 device_timestamp, 2362 struct ieee802_11_elems *full_elems, 2363 struct ieee802_11_elems *csa_elems, 2364 enum ieee80211_csa_source source) 2365 { 2366 struct ieee80211_sub_if_data *sdata = link->sdata; 2367 struct ieee80211_local *local = sdata->local; 2368 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2369 struct ieee80211_chanctx *chanctx = NULL; 2370 struct ieee80211_chanctx_conf *conf; 2371 struct ieee80211_csa_ie csa_ie = {}; 2372 struct ieee80211_channel_switch ch_switch = { 2373 .link_id = link->link_id, 2374 .timestamp = timestamp, 2375 .device_timestamp = device_timestamp, 2376 }; 2377 unsigned long now; 2378 int res; 2379 2380 lockdep_assert_wiphy(local->hw.wiphy); 2381 2382 if (csa_elems) { 2383 struct cfg80211_bss *cbss = link->conf->bss; 2384 enum nl80211_band current_band; 2385 struct ieee80211_bss *bss; 2386 2387 if (WARN_ON(!cbss)) 2388 return; 2389 2390 current_band = cbss->channel->band; 2391 bss = (void *)cbss->priv; 2392 2393 res = ieee80211_parse_ch_switch_ie(sdata, csa_elems, 2394 current_band, 2395 bss->vht_cap_info, 2396 &link->u.mgd.conn, 2397 link->u.mgd.bssid, 2398 source == IEEE80211_CSA_SOURCE_UNPROT_ACTION, 2399 &csa_ie); 2400 if (res == 0) { 2401 ch_switch.block_tx = csa_ie.mode; 2402 ch_switch.chandef = csa_ie.chanreq.oper; 2403 ch_switch.count = csa_ie.count; 2404 ch_switch.delay = csa_ie.max_switch_time; 2405 } 2406 2407 link->u.mgd.csa.tpe = csa_elems->csa_tpe; 2408 } else { 2409 /* 2410 * If there was no per-STA profile for this link, we 2411 * get called with csa_elems == NULL. This of course means 2412 * there are no CSA elements, so set res=1 indicating 2413 * no more CSA. 2414 */ 2415 res = 1; 2416 } 2417 2418 if (res < 0) { 2419 /* ignore this case, not a protected frame */ 2420 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) 2421 return; 2422 goto drop_connection; 2423 } 2424 2425 if (link->conf->csa_active) { 2426 switch (source) { 2427 case IEEE80211_CSA_SOURCE_PROT_ACTION: 2428 case IEEE80211_CSA_SOURCE_UNPROT_ACTION: 2429 /* already processing - disregard action frames */ 2430 return; 2431 case IEEE80211_CSA_SOURCE_BEACON: 2432 if (link->u.mgd.csa.waiting_bcn) { 2433 ieee80211_chswitch_post_beacon(link); 2434 /* 2435 * If the CSA is still present after the switch 2436 * we need to consider it as a new CSA (possibly 2437 * to self). This happens by not returning here 2438 * so we'll get to the check below. 2439 */ 2440 } else if (res) { 2441 ieee80211_sta_abort_chanswitch(link); 2442 return; 2443 } else { 2444 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2445 return; 2446 } 2447 break; 2448 case IEEE80211_CSA_SOURCE_OTHER_LINK: 2449 /* active link: we want to see the beacon to continue */ 2450 if (ieee80211_vif_link_active(&sdata->vif, 2451 link->link_id)) 2452 return; 2453 2454 /* switch work ran, so just complete the process */ 2455 if (link->u.mgd.csa.waiting_bcn) { 2456 ieee80211_chswitch_post_beacon(link); 2457 /* 2458 * If the CSA is still present after the switch 2459 * we need to consider it as a new CSA (possibly 2460 * to self). This happens by not returning here 2461 * so we'll get to the check below. 2462 */ 2463 break; 2464 } 2465 2466 /* link still has CSA but we already know, do nothing */ 2467 if (!res) 2468 return; 2469 2470 /* check in the RNR if the CSA aborted */ 2471 ieee80211_sta_other_link_csa_disappeared(link, 2472 full_elems); 2473 return; 2474 } 2475 } 2476 2477 /* no active CSA nor a new one */ 2478 if (res) { 2479 /* 2480 * However, we may have stopped queues when receiving a public 2481 * action frame that couldn't be protected, if it had the quiet 2482 * bit set. This is a trade-off, we want to be quiet as soon as 2483 * possible, but also don't trust the public action frame much, 2484 * as it can't be protected. 2485 */ 2486 if (unlikely(link->u.mgd.csa.blocked_tx)) { 2487 link->u.mgd.csa.blocked_tx = false; 2488 ieee80211_vif_unblock_queues_csa(sdata); 2489 } 2490 return; 2491 } 2492 2493 /* 2494 * We don't really trust public action frames, but block queues (go to 2495 * quiet mode) for them anyway, we should get a beacon soon to either 2496 * know what the CSA really is, or figure out the public action frame 2497 * was actually an attack. 2498 */ 2499 if (source == IEEE80211_CSA_SOURCE_UNPROT_ACTION) { 2500 if (csa_ie.mode) { 2501 link->u.mgd.csa.blocked_tx = true; 2502 ieee80211_vif_block_queues_csa(sdata); 2503 } 2504 return; 2505 } 2506 2507 if (link->conf->chanreq.oper.chan->band != 2508 csa_ie.chanreq.oper.chan->band) { 2509 link_info(link, 2510 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2511 link->u.mgd.bssid, 2512 csa_ie.chanreq.oper.chan->center_freq, 2513 csa_ie.chanreq.oper.width, 2514 csa_ie.chanreq.oper.center_freq1, 2515 csa_ie.chanreq.oper.center_freq2); 2516 goto drop_connection; 2517 } 2518 2519 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2520 IEEE80211_CHAN_DISABLED)) { 2521 link_info(link, 2522 "AP %pM switches to unsupported channel (%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), disconnecting\n", 2523 link->u.mgd.bssid, 2524 csa_ie.chanreq.oper.chan->center_freq, 2525 csa_ie.chanreq.oper.chan->freq_offset, 2526 csa_ie.chanreq.oper.width, 2527 csa_ie.chanreq.oper.center_freq1, 2528 csa_ie.chanreq.oper.freq1_offset, 2529 csa_ie.chanreq.oper.center_freq2); 2530 goto drop_connection; 2531 } 2532 2533 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2534 &link->conf->chanreq.oper) && 2535 (!csa_ie.mode || source != IEEE80211_CSA_SOURCE_BEACON)) { 2536 if (link->u.mgd.csa.ignored_same_chan) 2537 return; 2538 link_info(link, 2539 "AP %pM tries to chanswitch to same channel, ignore\n", 2540 link->u.mgd.bssid); 2541 link->u.mgd.csa.ignored_same_chan = true; 2542 return; 2543 } 2544 2545 /* 2546 * Drop all TDLS peers on the affected link - either we disconnect or 2547 * move to a different channel from this point on. There's no telling 2548 * what our peer will do. 2549 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2550 * have an incompatible wider chandef. 2551 */ 2552 ieee80211_teardown_tdls_peers(link); 2553 2554 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2555 lockdep_is_held(&local->hw.wiphy->mtx)); 2556 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && !conf) { 2557 link_info(link, 2558 "no channel context assigned to vif?, disconnecting\n"); 2559 goto drop_connection; 2560 } 2561 2562 if (conf) 2563 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2564 2565 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2566 link_info(link, 2567 "driver doesn't support chan-switch with channel contexts\n"); 2568 goto drop_connection; 2569 } 2570 2571 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2572 link_info(link, 2573 "preparing for channel switch failed, disconnecting\n"); 2574 goto drop_connection; 2575 } 2576 2577 link->u.mgd.csa.ap_chandef = csa_ie.chanreq.ap; 2578 2579 link->csa.chanreq.oper = csa_ie.chanreq.oper; 2580 ieee80211_set_chanreq_ap(sdata, &link->csa.chanreq, &link->u.mgd.conn, 2581 &csa_ie.chanreq.ap); 2582 2583 if (chanctx) { 2584 res = ieee80211_link_reserve_chanctx(link, &link->csa.chanreq, 2585 chanctx->mode, false); 2586 if (res) { 2587 link_info(link, 2588 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2589 res); 2590 goto drop_connection; 2591 } 2592 } 2593 2594 link->conf->csa_active = true; 2595 link->u.mgd.csa.ignored_same_chan = false; 2596 link->u.mgd.beacon_crc_valid = false; 2597 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2598 2599 if (csa_ie.mode) 2600 ieee80211_vif_block_queues_csa(sdata); 2601 2602 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2603 link->link_id, csa_ie.count, 2604 csa_ie.mode); 2605 2606 /* we may have to handle timeout for deactivated link in software */ 2607 now = jiffies; 2608 link->u.mgd.csa.time = now + 2609 TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2610 link->conf->beacon_int); 2611 2612 if (ieee80211_vif_link_active(&sdata->vif, link->link_id) && 2613 local->ops->channel_switch) { 2614 /* 2615 * Use driver's channel switch callback, the driver will 2616 * later call ieee80211_chswitch_done(). It may deactivate 2617 * the link as well, we handle that elsewhere and queue 2618 * the csa.switch_work for the calculated time then. 2619 */ 2620 drv_channel_switch(local, sdata, &ch_switch); 2621 return; 2622 } 2623 2624 /* channel switch handled in software */ 2625 wiphy_delayed_work_queue(local->hw.wiphy, 2626 &link->u.mgd.csa.switch_work, 2627 link->u.mgd.csa.time - now); 2628 return; 2629 drop_connection: 2630 /* 2631 * This is just so that the disconnect flow will know that 2632 * we were trying to switch channel and failed. In case the 2633 * mode is 1 (we are not allowed to Tx), we will know not to 2634 * send a deauthentication frame. Those two fields will be 2635 * reset when the disconnection worker runs. 2636 */ 2637 link->conf->csa_active = true; 2638 link->u.mgd.csa.blocked_tx = csa_ie.mode; 2639 sdata->csa_blocked_queues = 2640 csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA); 2641 2642 wiphy_work_queue(sdata->local->hw.wiphy, 2643 &ifmgd->csa_connection_drop_work); 2644 } 2645 2646 static bool 2647 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2648 struct ieee80211_channel *channel, 2649 const u8 *country_ie, u8 country_ie_len, 2650 const u8 *pwr_constr_elem, 2651 int *chan_pwr, int *pwr_reduction) 2652 { 2653 struct ieee80211_country_ie_triplet *triplet; 2654 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2655 int i, chan_increment; 2656 bool have_chan_pwr = false; 2657 2658 /* Invalid IE */ 2659 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2660 return false; 2661 2662 triplet = (void *)(country_ie + 3); 2663 country_ie_len -= 3; 2664 2665 switch (channel->band) { 2666 default: 2667 WARN_ON_ONCE(1); 2668 fallthrough; 2669 case NL80211_BAND_2GHZ: 2670 case NL80211_BAND_60GHZ: 2671 case NL80211_BAND_LC: 2672 chan_increment = 1; 2673 break; 2674 case NL80211_BAND_5GHZ: 2675 chan_increment = 4; 2676 break; 2677 case NL80211_BAND_6GHZ: 2678 /* 2679 * In the 6 GHz band, the "maximum transmit power level" 2680 * field in the triplets is reserved, and thus will be 2681 * zero and we shouldn't use it to control TX power. 2682 * The actual TX power will be given in the transmit 2683 * power envelope element instead. 2684 */ 2685 return false; 2686 } 2687 2688 /* find channel */ 2689 while (country_ie_len >= 3) { 2690 u8 first_channel = triplet->chans.first_channel; 2691 2692 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2693 goto next; 2694 2695 for (i = 0; i < triplet->chans.num_channels; i++) { 2696 if (first_channel + i * chan_increment == chan) { 2697 have_chan_pwr = true; 2698 *chan_pwr = triplet->chans.max_power; 2699 break; 2700 } 2701 } 2702 if (have_chan_pwr) 2703 break; 2704 2705 next: 2706 triplet++; 2707 country_ie_len -= 3; 2708 } 2709 2710 if (have_chan_pwr && pwr_constr_elem) 2711 *pwr_reduction = *pwr_constr_elem; 2712 else 2713 *pwr_reduction = 0; 2714 2715 return have_chan_pwr; 2716 } 2717 2718 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2719 struct ieee80211_channel *channel, 2720 const u8 *cisco_dtpc_ie, 2721 int *pwr_level) 2722 { 2723 /* From practical testing, the first data byte of the DTPC element 2724 * seems to contain the requested dBm level, and the CLI on Cisco 2725 * APs clearly state the range is -127 to 127 dBm, which indicates 2726 * a signed byte, although it seemingly never actually goes negative. 2727 * The other byte seems to always be zero. 2728 */ 2729 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2730 } 2731 2732 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2733 struct ieee80211_channel *channel, 2734 struct ieee80211_mgmt *mgmt, 2735 const u8 *country_ie, u8 country_ie_len, 2736 const u8 *pwr_constr_ie, 2737 const u8 *cisco_dtpc_ie) 2738 { 2739 struct ieee80211_sub_if_data *sdata = link->sdata; 2740 bool has_80211h_pwr = false, has_cisco_pwr = false; 2741 int chan_pwr = 0, pwr_reduction_80211h = 0; 2742 int pwr_level_cisco, pwr_level_80211h; 2743 int new_ap_level; 2744 __le16 capab = mgmt->u.probe_resp.capab_info; 2745 2746 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2747 return 0; /* TODO */ 2748 2749 if (country_ie && 2750 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2751 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2752 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2753 sdata, channel, country_ie, country_ie_len, 2754 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2755 pwr_level_80211h = 2756 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2757 } 2758 2759 if (cisco_dtpc_ie) { 2760 ieee80211_find_cisco_dtpc( 2761 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2762 has_cisco_pwr = true; 2763 } 2764 2765 if (!has_80211h_pwr && !has_cisco_pwr) 2766 return 0; 2767 2768 /* If we have both 802.11h and Cisco DTPC, apply both limits 2769 * by picking the smallest of the two power levels advertised. 2770 */ 2771 if (has_80211h_pwr && 2772 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2773 new_ap_level = pwr_level_80211h; 2774 2775 if (link->ap_power_level == new_ap_level) 2776 return 0; 2777 2778 sdata_dbg(sdata, 2779 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2780 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2781 link->u.mgd.bssid); 2782 } else { /* has_cisco_pwr is always true here. */ 2783 new_ap_level = pwr_level_cisco; 2784 2785 if (link->ap_power_level == new_ap_level) 2786 return 0; 2787 2788 sdata_dbg(sdata, 2789 "Limiting TX power to %d dBm as advertised by %pM\n", 2790 pwr_level_cisco, link->u.mgd.bssid); 2791 } 2792 2793 link->ap_power_level = new_ap_level; 2794 if (__ieee80211_recalc_txpower(sdata)) 2795 return BSS_CHANGED_TXPOWER; 2796 return 0; 2797 } 2798 2799 /* powersave */ 2800 static void ieee80211_enable_ps(struct ieee80211_local *local, 2801 struct ieee80211_sub_if_data *sdata) 2802 { 2803 struct ieee80211_conf *conf = &local->hw.conf; 2804 2805 /* 2806 * If we are scanning right now then the parameters will 2807 * take effect when scan finishes. 2808 */ 2809 if (local->scanning) 2810 return; 2811 2812 if (conf->dynamic_ps_timeout > 0 && 2813 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2814 mod_timer(&local->dynamic_ps_timer, jiffies + 2815 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2816 } else { 2817 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2818 ieee80211_send_nullfunc(local, sdata, true); 2819 2820 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2821 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2822 return; 2823 2824 conf->flags |= IEEE80211_CONF_PS; 2825 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2826 } 2827 } 2828 2829 static void ieee80211_change_ps(struct ieee80211_local *local) 2830 { 2831 struct ieee80211_conf *conf = &local->hw.conf; 2832 2833 if (local->ps_sdata) { 2834 ieee80211_enable_ps(local, local->ps_sdata); 2835 } else if (conf->flags & IEEE80211_CONF_PS) { 2836 conf->flags &= ~IEEE80211_CONF_PS; 2837 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2838 del_timer_sync(&local->dynamic_ps_timer); 2839 wiphy_work_cancel(local->hw.wiphy, 2840 &local->dynamic_ps_enable_work); 2841 } 2842 } 2843 2844 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2845 { 2846 struct ieee80211_local *local = sdata->local; 2847 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2848 struct sta_info *sta = NULL; 2849 bool authorized = false; 2850 2851 if (!mgd->powersave) 2852 return false; 2853 2854 if (mgd->broken_ap) 2855 return false; 2856 2857 if (!mgd->associated) 2858 return false; 2859 2860 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2861 return false; 2862 2863 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2864 !sdata->deflink.u.mgd.have_beacon) 2865 return false; 2866 2867 rcu_read_lock(); 2868 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2869 if (sta) 2870 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2871 rcu_read_unlock(); 2872 2873 return authorized; 2874 } 2875 2876 /* need to hold RTNL or interface lock */ 2877 void ieee80211_recalc_ps(struct ieee80211_local *local) 2878 { 2879 struct ieee80211_sub_if_data *sdata, *found = NULL; 2880 int count = 0; 2881 int timeout; 2882 2883 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2884 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2885 local->ps_sdata = NULL; 2886 return; 2887 } 2888 2889 list_for_each_entry(sdata, &local->interfaces, list) { 2890 if (!ieee80211_sdata_running(sdata)) 2891 continue; 2892 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2893 /* If an AP vif is found, then disable PS 2894 * by setting the count to zero thereby setting 2895 * ps_sdata to NULL. 2896 */ 2897 count = 0; 2898 break; 2899 } 2900 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2901 continue; 2902 found = sdata; 2903 count++; 2904 } 2905 2906 if (count == 1 && ieee80211_powersave_allowed(found)) { 2907 u8 dtimper = found->deflink.u.mgd.dtim_period; 2908 2909 timeout = local->dynamic_ps_forced_timeout; 2910 if (timeout < 0) 2911 timeout = 100; 2912 local->hw.conf.dynamic_ps_timeout = timeout; 2913 2914 /* If the TIM IE is invalid, pretend the value is 1 */ 2915 if (!dtimper) 2916 dtimper = 1; 2917 2918 local->hw.conf.ps_dtim_period = dtimper; 2919 local->ps_sdata = found; 2920 } else { 2921 local->ps_sdata = NULL; 2922 } 2923 2924 ieee80211_change_ps(local); 2925 } 2926 2927 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2928 { 2929 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2930 2931 if (sdata->vif.cfg.ps != ps_allowed) { 2932 sdata->vif.cfg.ps = ps_allowed; 2933 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2934 } 2935 } 2936 2937 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2938 struct wiphy_work *work) 2939 { 2940 struct ieee80211_local *local = 2941 container_of(work, struct ieee80211_local, 2942 dynamic_ps_disable_work); 2943 2944 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2945 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2946 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2947 } 2948 2949 ieee80211_wake_queues_by_reason(&local->hw, 2950 IEEE80211_MAX_QUEUE_MAP, 2951 IEEE80211_QUEUE_STOP_REASON_PS, 2952 false); 2953 } 2954 2955 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2956 struct wiphy_work *work) 2957 { 2958 struct ieee80211_local *local = 2959 container_of(work, struct ieee80211_local, 2960 dynamic_ps_enable_work); 2961 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2962 struct ieee80211_if_managed *ifmgd; 2963 unsigned long flags; 2964 int q; 2965 2966 /* can only happen when PS was just disabled anyway */ 2967 if (!sdata) 2968 return; 2969 2970 ifmgd = &sdata->u.mgd; 2971 2972 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2973 return; 2974 2975 if (local->hw.conf.dynamic_ps_timeout > 0) { 2976 /* don't enter PS if TX frames are pending */ 2977 if (drv_tx_frames_pending(local)) { 2978 mod_timer(&local->dynamic_ps_timer, jiffies + 2979 msecs_to_jiffies( 2980 local->hw.conf.dynamic_ps_timeout)); 2981 return; 2982 } 2983 2984 /* 2985 * transmission can be stopped by others which leads to 2986 * dynamic_ps_timer expiry. Postpone the ps timer if it 2987 * is not the actual idle state. 2988 */ 2989 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2990 for (q = 0; q < local->hw.queues; q++) { 2991 if (local->queue_stop_reasons[q]) { 2992 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2993 flags); 2994 mod_timer(&local->dynamic_ps_timer, jiffies + 2995 msecs_to_jiffies( 2996 local->hw.conf.dynamic_ps_timeout)); 2997 return; 2998 } 2999 } 3000 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 3001 } 3002 3003 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 3004 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3005 if (drv_tx_frames_pending(local)) { 3006 mod_timer(&local->dynamic_ps_timer, jiffies + 3007 msecs_to_jiffies( 3008 local->hw.conf.dynamic_ps_timeout)); 3009 } else { 3010 ieee80211_send_nullfunc(local, sdata, true); 3011 /* Flush to get the tx status of nullfunc frame */ 3012 ieee80211_flush_queues(local, sdata, false); 3013 } 3014 } 3015 3016 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 3017 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 3018 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 3019 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 3020 local->hw.conf.flags |= IEEE80211_CONF_PS; 3021 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3022 } 3023 } 3024 3025 void ieee80211_dynamic_ps_timer(struct timer_list *t) 3026 { 3027 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 3028 3029 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 3030 } 3031 3032 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 3033 { 3034 struct ieee80211_sub_if_data *sdata = 3035 container_of(work, struct ieee80211_sub_if_data, 3036 dfs_cac_timer_work.work); 3037 struct cfg80211_chan_def chandef = sdata->vif.bss_conf.chanreq.oper; 3038 3039 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3040 3041 if (sdata->wdev.cac_started) { 3042 ieee80211_link_release_channel(&sdata->deflink); 3043 cfg80211_cac_event(sdata->dev, &chandef, 3044 NL80211_RADAR_CAC_FINISHED, 3045 GFP_KERNEL); 3046 } 3047 } 3048 3049 static bool 3050 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3051 { 3052 struct ieee80211_local *local = sdata->local; 3053 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3054 bool ret = false; 3055 int ac; 3056 3057 if (local->hw.queues < IEEE80211_NUM_ACS) 3058 return false; 3059 3060 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3061 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3062 int non_acm_ac; 3063 unsigned long now = jiffies; 3064 3065 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3066 tx_tspec->admitted_time && 3067 time_after(now, tx_tspec->time_slice_start + HZ)) { 3068 tx_tspec->consumed_tx_time = 0; 3069 tx_tspec->time_slice_start = now; 3070 3071 if (tx_tspec->downgraded) 3072 tx_tspec->action = 3073 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3074 } 3075 3076 switch (tx_tspec->action) { 3077 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3078 /* take the original parameters */ 3079 if (drv_conf_tx(local, &sdata->deflink, ac, 3080 &sdata->deflink.tx_conf[ac])) 3081 link_err(&sdata->deflink, 3082 "failed to set TX queue parameters for queue %d\n", 3083 ac); 3084 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3085 tx_tspec->downgraded = false; 3086 ret = true; 3087 break; 3088 case TX_TSPEC_ACTION_DOWNGRADE: 3089 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3090 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3091 ret = true; 3092 break; 3093 } 3094 /* downgrade next lower non-ACM AC */ 3095 for (non_acm_ac = ac + 1; 3096 non_acm_ac < IEEE80211_NUM_ACS; 3097 non_acm_ac++) 3098 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3099 break; 3100 /* Usually the loop will result in using BK even if it 3101 * requires admission control, but such a configuration 3102 * makes no sense and we have to transmit somehow - the 3103 * AC selection does the same thing. 3104 * If we started out trying to downgrade from BK, then 3105 * the extra condition here might be needed. 3106 */ 3107 if (non_acm_ac >= IEEE80211_NUM_ACS) 3108 non_acm_ac = IEEE80211_AC_BK; 3109 if (drv_conf_tx(local, &sdata->deflink, ac, 3110 &sdata->deflink.tx_conf[non_acm_ac])) 3111 link_err(&sdata->deflink, 3112 "failed to set TX queue parameters for queue %d\n", 3113 ac); 3114 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3115 ret = true; 3116 wiphy_delayed_work_queue(local->hw.wiphy, 3117 &ifmgd->tx_tspec_wk, 3118 tx_tspec->time_slice_start + 3119 HZ - now + 1); 3120 break; 3121 case TX_TSPEC_ACTION_NONE: 3122 /* nothing now */ 3123 break; 3124 } 3125 } 3126 3127 return ret; 3128 } 3129 3130 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3131 { 3132 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3133 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3134 BSS_CHANGED_QOS); 3135 } 3136 3137 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3138 struct wiphy_work *work) 3139 { 3140 struct ieee80211_sub_if_data *sdata; 3141 3142 sdata = container_of(work, struct ieee80211_sub_if_data, 3143 u.mgd.tx_tspec_wk.work); 3144 ieee80211_sta_handle_tspec_ac_params(sdata); 3145 } 3146 3147 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3148 { 3149 struct ieee80211_sub_if_data *sdata = link->sdata; 3150 struct ieee80211_local *local = sdata->local; 3151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3152 struct ieee80211_tx_queue_params *params = link->tx_conf; 3153 u8 ac; 3154 3155 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3156 mlme_dbg(sdata, 3157 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3158 ac, params[ac].acm, 3159 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3160 params[ac].txop, params[ac].uapsd, 3161 ifmgd->tx_tspec[ac].downgraded); 3162 if (!ifmgd->tx_tspec[ac].downgraded && 3163 drv_conf_tx(local, link, ac, ¶ms[ac])) 3164 link_err(link, 3165 "failed to set TX queue parameters for AC %d\n", 3166 ac); 3167 } 3168 } 3169 3170 /* MLME */ 3171 static bool 3172 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3173 struct ieee80211_link_data *link, 3174 const u8 *wmm_param, size_t wmm_param_len, 3175 const struct ieee80211_mu_edca_param_set *mu_edca) 3176 { 3177 struct ieee80211_sub_if_data *sdata = link->sdata; 3178 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3179 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3180 size_t left; 3181 int count, mu_edca_count, ac; 3182 const u8 *pos; 3183 u8 uapsd_queues = 0; 3184 3185 if (!local->ops->conf_tx) 3186 return false; 3187 3188 if (local->hw.queues < IEEE80211_NUM_ACS) 3189 return false; 3190 3191 if (!wmm_param) 3192 return false; 3193 3194 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3195 return false; 3196 3197 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3198 uapsd_queues = ifmgd->uapsd_queues; 3199 3200 count = wmm_param[6] & 0x0f; 3201 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3202 * if mu_edca was preset before and now it disappeared tell 3203 * the driver about it. 3204 */ 3205 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3206 if (count == link->u.mgd.wmm_last_param_set && 3207 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3208 return false; 3209 link->u.mgd.wmm_last_param_set = count; 3210 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3211 3212 pos = wmm_param + 8; 3213 left = wmm_param_len - 8; 3214 3215 memset(¶ms, 0, sizeof(params)); 3216 3217 sdata->wmm_acm = 0; 3218 for (; left >= 4; left -= 4, pos += 4) { 3219 int aci = (pos[0] >> 5) & 0x03; 3220 int acm = (pos[0] >> 4) & 0x01; 3221 bool uapsd = false; 3222 3223 switch (aci) { 3224 case 1: /* AC_BK */ 3225 ac = IEEE80211_AC_BK; 3226 if (acm) 3227 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3228 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3229 uapsd = true; 3230 params[ac].mu_edca = !!mu_edca; 3231 if (mu_edca) 3232 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3233 break; 3234 case 2: /* AC_VI */ 3235 ac = IEEE80211_AC_VI; 3236 if (acm) 3237 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3238 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3239 uapsd = true; 3240 params[ac].mu_edca = !!mu_edca; 3241 if (mu_edca) 3242 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3243 break; 3244 case 3: /* AC_VO */ 3245 ac = IEEE80211_AC_VO; 3246 if (acm) 3247 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3248 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3249 uapsd = true; 3250 params[ac].mu_edca = !!mu_edca; 3251 if (mu_edca) 3252 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3253 break; 3254 case 0: /* AC_BE */ 3255 default: 3256 ac = IEEE80211_AC_BE; 3257 if (acm) 3258 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3259 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3260 uapsd = true; 3261 params[ac].mu_edca = !!mu_edca; 3262 if (mu_edca) 3263 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3264 break; 3265 } 3266 3267 params[ac].aifs = pos[0] & 0x0f; 3268 3269 if (params[ac].aifs < 2) { 3270 link_info(link, 3271 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3272 params[ac].aifs, aci); 3273 params[ac].aifs = 2; 3274 } 3275 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3276 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3277 params[ac].txop = get_unaligned_le16(pos + 2); 3278 params[ac].acm = acm; 3279 params[ac].uapsd = uapsd; 3280 3281 if (params[ac].cw_min == 0 || 3282 params[ac].cw_min > params[ac].cw_max) { 3283 link_info(link, 3284 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3285 params[ac].cw_min, params[ac].cw_max, aci); 3286 return false; 3287 } 3288 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3289 } 3290 3291 /* WMM specification requires all 4 ACIs. */ 3292 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3293 if (params[ac].cw_min == 0) { 3294 link_info(link, 3295 "AP has invalid WMM params (missing AC %d), using defaults\n", 3296 ac); 3297 return false; 3298 } 3299 } 3300 3301 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3302 link->tx_conf[ac] = params[ac]; 3303 3304 ieee80211_mgd_set_link_qos_params(link); 3305 3306 /* enable WMM or activate new settings */ 3307 link->conf->qos = true; 3308 return true; 3309 } 3310 3311 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3312 { 3313 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3314 3315 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3316 ieee80211_run_deferred_scan(sdata->local); 3317 } 3318 3319 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3320 { 3321 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3322 3323 __ieee80211_stop_poll(sdata); 3324 } 3325 3326 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3327 u16 capab, bool erp_valid, u8 erp) 3328 { 3329 struct ieee80211_bss_conf *bss_conf = link->conf; 3330 struct ieee80211_supported_band *sband; 3331 u64 changed = 0; 3332 bool use_protection; 3333 bool use_short_preamble; 3334 bool use_short_slot; 3335 3336 sband = ieee80211_get_link_sband(link); 3337 if (!sband) 3338 return changed; 3339 3340 if (erp_valid) { 3341 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3342 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3343 } else { 3344 use_protection = false; 3345 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3346 } 3347 3348 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3349 if (sband->band == NL80211_BAND_5GHZ || 3350 sband->band == NL80211_BAND_6GHZ) 3351 use_short_slot = true; 3352 3353 if (use_protection != bss_conf->use_cts_prot) { 3354 bss_conf->use_cts_prot = use_protection; 3355 changed |= BSS_CHANGED_ERP_CTS_PROT; 3356 } 3357 3358 if (use_short_preamble != bss_conf->use_short_preamble) { 3359 bss_conf->use_short_preamble = use_short_preamble; 3360 changed |= BSS_CHANGED_ERP_PREAMBLE; 3361 } 3362 3363 if (use_short_slot != bss_conf->use_short_slot) { 3364 bss_conf->use_short_slot = use_short_slot; 3365 changed |= BSS_CHANGED_ERP_SLOT; 3366 } 3367 3368 return changed; 3369 } 3370 3371 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3372 struct cfg80211_bss *cbss) 3373 { 3374 struct ieee80211_sub_if_data *sdata = link->sdata; 3375 struct ieee80211_bss_conf *bss_conf = link->conf; 3376 struct ieee80211_bss *bss = (void *)cbss->priv; 3377 u64 changed = BSS_CHANGED_QOS; 3378 3379 /* not really used in MLO */ 3380 sdata->u.mgd.beacon_timeout = 3381 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3382 bss_conf->beacon_int)); 3383 3384 changed |= ieee80211_handle_bss_capability(link, 3385 bss_conf->assoc_capability, 3386 bss->has_erp_value, 3387 bss->erp_value); 3388 3389 ieee80211_check_rate_mask(link); 3390 3391 link->conf->bss = cbss; 3392 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3393 3394 if (sdata->vif.p2p || 3395 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3396 const struct cfg80211_bss_ies *ies; 3397 3398 rcu_read_lock(); 3399 ies = rcu_dereference(cbss->ies); 3400 if (ies) { 3401 int ret; 3402 3403 ret = cfg80211_get_p2p_attr( 3404 ies->data, ies->len, 3405 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3406 (u8 *) &bss_conf->p2p_noa_attr, 3407 sizeof(bss_conf->p2p_noa_attr)); 3408 if (ret >= 2) { 3409 link->u.mgd.p2p_noa_index = 3410 bss_conf->p2p_noa_attr.index; 3411 changed |= BSS_CHANGED_P2P_PS; 3412 } 3413 } 3414 rcu_read_unlock(); 3415 } 3416 3417 if (link->u.mgd.have_beacon) { 3418 bss_conf->beacon_rate = bss->beacon_rate; 3419 changed |= BSS_CHANGED_BEACON_INFO; 3420 } else { 3421 bss_conf->beacon_rate = NULL; 3422 } 3423 3424 /* Tell the driver to monitor connection quality (if supported) */ 3425 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3426 bss_conf->cqm_rssi_thold) 3427 changed |= BSS_CHANGED_CQM; 3428 3429 return changed; 3430 } 3431 3432 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3433 struct ieee80211_mgd_assoc_data *assoc_data, 3434 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3435 { 3436 struct ieee80211_local *local = sdata->local; 3437 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3438 u64 vif_changed = BSS_CHANGED_ASSOC; 3439 unsigned int link_id; 3440 3441 lockdep_assert_wiphy(local->hw.wiphy); 3442 3443 sdata->u.mgd.associated = true; 3444 3445 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3446 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3447 struct ieee80211_link_data *link; 3448 3449 if (!cbss || 3450 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3451 continue; 3452 3453 if (ieee80211_vif_is_mld(&sdata->vif) && 3454 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3455 continue; 3456 3457 link = sdata_dereference(sdata->link[link_id], sdata); 3458 if (WARN_ON(!link)) 3459 return; 3460 3461 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3462 } 3463 3464 /* just to be sure */ 3465 ieee80211_stop_poll(sdata); 3466 3467 ieee80211_led_assoc(local, 1); 3468 3469 vif_cfg->assoc = 1; 3470 3471 /* Enable ARP filtering */ 3472 if (vif_cfg->arp_addr_cnt) 3473 vif_changed |= BSS_CHANGED_ARP_FILTER; 3474 3475 if (ieee80211_vif_is_mld(&sdata->vif)) { 3476 for (link_id = 0; 3477 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3478 link_id++) { 3479 struct ieee80211_link_data *link; 3480 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3481 3482 if (!cbss || 3483 !(BIT(link_id) & 3484 ieee80211_vif_usable_links(&sdata->vif)) || 3485 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3486 continue; 3487 3488 link = sdata_dereference(sdata->link[link_id], sdata); 3489 if (WARN_ON(!link)) 3490 return; 3491 3492 ieee80211_link_info_change_notify(sdata, link, 3493 changed[link_id]); 3494 3495 ieee80211_recalc_smps(sdata, link); 3496 } 3497 3498 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3499 } else { 3500 ieee80211_bss_info_change_notify(sdata, 3501 vif_changed | changed[0]); 3502 } 3503 3504 ieee80211_recalc_ps(local); 3505 3506 /* leave this here to not change ordering in non-MLO cases */ 3507 if (!ieee80211_vif_is_mld(&sdata->vif)) 3508 ieee80211_recalc_smps(sdata, &sdata->deflink); 3509 ieee80211_recalc_ps_vif(sdata); 3510 3511 netif_carrier_on(sdata->dev); 3512 } 3513 3514 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3515 u16 stype, u16 reason, bool tx, 3516 u8 *frame_buf) 3517 { 3518 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3519 struct ieee80211_local *local = sdata->local; 3520 unsigned int link_id; 3521 u64 changed = 0; 3522 struct ieee80211_prep_tx_info info = { 3523 .subtype = stype, 3524 .was_assoc = true, 3525 .link_id = ffs(sdata->vif.active_links) - 1, 3526 }; 3527 3528 lockdep_assert_wiphy(local->hw.wiphy); 3529 3530 if (WARN_ON_ONCE(tx && !frame_buf)) 3531 return; 3532 3533 if (WARN_ON(!ifmgd->associated)) 3534 return; 3535 3536 ieee80211_stop_poll(sdata); 3537 3538 ifmgd->associated = false; 3539 3540 /* other links will be destroyed */ 3541 sdata->deflink.conf->bss = NULL; 3542 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3543 3544 netif_carrier_off(sdata->dev); 3545 3546 /* 3547 * if we want to get out of ps before disassoc (why?) we have 3548 * to do it before sending disassoc, as otherwise the null-packet 3549 * won't be valid. 3550 */ 3551 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3552 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3553 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3554 } 3555 local->ps_sdata = NULL; 3556 3557 /* disable per-vif ps */ 3558 ieee80211_recalc_ps_vif(sdata); 3559 3560 /* make sure ongoing transmission finishes */ 3561 synchronize_net(); 3562 3563 /* 3564 * drop any frame before deauth/disassoc, this can be data or 3565 * management frame. Since we are disconnecting, we should not 3566 * insist sending these frames which can take time and delay 3567 * the disconnection and possible the roaming. 3568 */ 3569 if (tx) 3570 ieee80211_flush_queues(local, sdata, true); 3571 3572 /* deauthenticate/disassociate now */ 3573 if (tx || frame_buf) { 3574 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3575 3576 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3577 sdata->vif.cfg.ap_addr, stype, 3578 reason, tx, frame_buf); 3579 } 3580 3581 /* flush out frame - make sure the deauth was actually sent */ 3582 if (tx) 3583 ieee80211_flush_queues(local, sdata, false); 3584 3585 drv_mgd_complete_tx(sdata->local, sdata, &info); 3586 3587 /* clear AP addr only after building the needed mgmt frames */ 3588 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3589 eth_zero_addr(sdata->vif.cfg.ap_addr); 3590 3591 sdata->vif.cfg.ssid_len = 0; 3592 3593 /* remove AP and TDLS peers */ 3594 sta_info_flush(sdata, -1); 3595 3596 /* finally reset all BSS / config parameters */ 3597 if (!ieee80211_vif_is_mld(&sdata->vif)) 3598 changed |= ieee80211_reset_erp_info(sdata); 3599 3600 ieee80211_led_assoc(local, 0); 3601 changed |= BSS_CHANGED_ASSOC; 3602 sdata->vif.cfg.assoc = false; 3603 3604 sdata->deflink.u.mgd.p2p_noa_index = -1; 3605 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3606 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3607 3608 /* on the next assoc, re-program HT/VHT parameters */ 3609 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3610 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3611 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3612 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3613 3614 /* 3615 * reset MU-MIMO ownership and group data in default link, 3616 * if used, other links are destroyed 3617 */ 3618 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3619 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3620 memset(sdata->vif.bss_conf.mu_group.position, 0, 3621 sizeof(sdata->vif.bss_conf.mu_group.position)); 3622 if (!ieee80211_vif_is_mld(&sdata->vif)) 3623 changed |= BSS_CHANGED_MU_GROUPS; 3624 sdata->vif.bss_conf.mu_mimo_owner = false; 3625 3626 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3627 3628 del_timer_sync(&local->dynamic_ps_timer); 3629 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3630 3631 /* Disable ARP filtering */ 3632 if (sdata->vif.cfg.arp_addr_cnt) 3633 changed |= BSS_CHANGED_ARP_FILTER; 3634 3635 sdata->vif.bss_conf.qos = false; 3636 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3637 changed |= BSS_CHANGED_QOS; 3638 /* The BSSID (not really interesting) and HT changed */ 3639 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3640 ieee80211_bss_info_change_notify(sdata, changed); 3641 } else { 3642 ieee80211_vif_cfg_change_notify(sdata, changed); 3643 } 3644 3645 /* disassociated - set to defaults now */ 3646 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3647 3648 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3649 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3650 del_timer_sync(&sdata->u.mgd.timer); 3651 3652 sdata->vif.bss_conf.dtim_period = 0; 3653 sdata->vif.bss_conf.beacon_rate = NULL; 3654 3655 sdata->deflink.u.mgd.have_beacon = false; 3656 sdata->deflink.u.mgd.tracking_signal_avg = false; 3657 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3658 3659 ifmgd->flags = 0; 3660 3661 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3662 struct ieee80211_link_data *link; 3663 3664 link = sdata_dereference(sdata->link[link_id], sdata); 3665 if (!link) 3666 continue; 3667 ieee80211_link_release_channel(link); 3668 } 3669 3670 sdata->vif.bss_conf.csa_active = false; 3671 sdata->deflink.u.mgd.csa.blocked_tx = false; 3672 sdata->deflink.u.mgd.csa.waiting_bcn = false; 3673 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 3674 ieee80211_vif_unblock_queues_csa(sdata); 3675 3676 /* existing TX TSPEC sessions no longer exist */ 3677 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3678 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3679 3680 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3681 sdata->vif.bss_conf.pwr_reduction = 0; 3682 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3683 3684 sdata->vif.cfg.eml_cap = 0; 3685 sdata->vif.cfg.eml_med_sync_delay = 0; 3686 sdata->vif.cfg.mld_capa_op = 0; 3687 3688 memset(&sdata->u.mgd.ttlm_info, 0, 3689 sizeof(sdata->u.mgd.ttlm_info)); 3690 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3691 3692 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 3693 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3694 &ifmgd->neg_ttlm_timeout_work); 3695 3696 sdata->u.mgd.removed_links = 0; 3697 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3698 &sdata->u.mgd.ml_reconf_work); 3699 3700 wiphy_work_cancel(sdata->local->hw.wiphy, 3701 &ifmgd->teardown_ttlm_work); 3702 3703 ieee80211_vif_set_links(sdata, 0, 0); 3704 3705 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3706 } 3707 3708 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3709 { 3710 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3711 struct ieee80211_local *local = sdata->local; 3712 3713 lockdep_assert_wiphy(local->hw.wiphy); 3714 3715 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3716 return; 3717 3718 __ieee80211_stop_poll(sdata); 3719 3720 ieee80211_recalc_ps(local); 3721 3722 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3723 return; 3724 3725 /* 3726 * We've received a probe response, but are not sure whether 3727 * we have or will be receiving any beacons or data, so let's 3728 * schedule the timers again, just in case. 3729 */ 3730 ieee80211_sta_reset_beacon_monitor(sdata); 3731 3732 mod_timer(&ifmgd->conn_mon_timer, 3733 round_jiffies_up(jiffies + 3734 IEEE80211_CONNECTION_IDLE_TIME)); 3735 } 3736 3737 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3738 struct ieee80211_hdr *hdr, 3739 u16 tx_time) 3740 { 3741 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3742 u16 tid; 3743 int ac; 3744 struct ieee80211_sta_tx_tspec *tx_tspec; 3745 unsigned long now = jiffies; 3746 3747 if (!ieee80211_is_data_qos(hdr->frame_control)) 3748 return; 3749 3750 tid = ieee80211_get_tid(hdr); 3751 ac = ieee80211_ac_from_tid(tid); 3752 tx_tspec = &ifmgd->tx_tspec[ac]; 3753 3754 if (likely(!tx_tspec->admitted_time)) 3755 return; 3756 3757 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3758 tx_tspec->consumed_tx_time = 0; 3759 tx_tspec->time_slice_start = now; 3760 3761 if (tx_tspec->downgraded) { 3762 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3763 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3764 &ifmgd->tx_tspec_wk, 0); 3765 } 3766 } 3767 3768 if (tx_tspec->downgraded) 3769 return; 3770 3771 tx_tspec->consumed_tx_time += tx_time; 3772 3773 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3774 tx_tspec->downgraded = true; 3775 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3776 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3777 &ifmgd->tx_tspec_wk, 0); 3778 } 3779 } 3780 3781 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3782 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3783 { 3784 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3785 3786 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3787 !sdata->u.mgd.probe_send_count) 3788 return; 3789 3790 if (ack) 3791 sdata->u.mgd.probe_send_count = 0; 3792 else 3793 sdata->u.mgd.nullfunc_failed = true; 3794 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3795 } 3796 3797 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3798 const u8 *src, const u8 *dst, 3799 const u8 *ssid, size_t ssid_len, 3800 struct ieee80211_channel *channel) 3801 { 3802 struct sk_buff *skb; 3803 3804 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3805 ssid, ssid_len, NULL, 0, 3806 IEEE80211_PROBE_FLAG_DIRECTED); 3807 if (skb) 3808 ieee80211_tx_skb(sdata, skb); 3809 } 3810 3811 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3812 { 3813 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3814 u8 *dst = sdata->vif.cfg.ap_addr; 3815 u8 unicast_limit = max(1, max_probe_tries - 3); 3816 struct sta_info *sta; 3817 3818 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3819 3820 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3821 return; 3822 3823 /* 3824 * Try sending broadcast probe requests for the last three 3825 * probe requests after the first ones failed since some 3826 * buggy APs only support broadcast probe requests. 3827 */ 3828 if (ifmgd->probe_send_count >= unicast_limit) 3829 dst = NULL; 3830 3831 /* 3832 * When the hardware reports an accurate Tx ACK status, it's 3833 * better to send a nullfunc frame instead of a probe request, 3834 * as it will kick us off the AP quickly if we aren't associated 3835 * anymore. The timeout will be reset if the frame is ACKed by 3836 * the AP. 3837 */ 3838 ifmgd->probe_send_count++; 3839 3840 if (dst) { 3841 sta = sta_info_get(sdata, dst); 3842 if (!WARN_ON(!sta)) 3843 ieee80211_check_fast_rx(sta); 3844 } 3845 3846 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3847 ifmgd->nullfunc_failed = false; 3848 ieee80211_send_nullfunc(sdata->local, sdata, false); 3849 } else { 3850 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3851 sdata->vif.cfg.ssid, 3852 sdata->vif.cfg.ssid_len, 3853 sdata->deflink.conf->bss->channel); 3854 } 3855 3856 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3857 run_again(sdata, ifmgd->probe_timeout); 3858 } 3859 3860 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3861 bool beacon) 3862 { 3863 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3864 bool already = false; 3865 3866 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3867 3868 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3869 return; 3870 3871 if (!ieee80211_sdata_running(sdata)) 3872 return; 3873 3874 if (!ifmgd->associated) 3875 return; 3876 3877 if (sdata->local->tmp_channel || sdata->local->scanning) 3878 return; 3879 3880 if (sdata->local->suspending) { 3881 /* reschedule after resume */ 3882 ieee80211_reset_ap_probe(sdata); 3883 return; 3884 } 3885 3886 if (beacon) { 3887 mlme_dbg_ratelimited(sdata, 3888 "detected beacon loss from AP (missed %d beacons) - probing\n", 3889 beacon_loss_count); 3890 3891 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3892 } 3893 3894 /* 3895 * The driver/our work has already reported this event or the 3896 * connection monitoring has kicked in and we have already sent 3897 * a probe request. Or maybe the AP died and the driver keeps 3898 * reporting until we disassociate... 3899 * 3900 * In either case we have to ignore the current call to this 3901 * function (except for setting the correct probe reason bit) 3902 * because otherwise we would reset the timer every time and 3903 * never check whether we received a probe response! 3904 */ 3905 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3906 already = true; 3907 3908 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3909 3910 if (already) 3911 return; 3912 3913 ieee80211_recalc_ps(sdata->local); 3914 3915 ifmgd->probe_send_count = 0; 3916 ieee80211_mgd_probe_ap_send(sdata); 3917 } 3918 3919 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3920 struct ieee80211_vif *vif) 3921 { 3922 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3923 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3924 struct cfg80211_bss *cbss; 3925 struct sk_buff *skb; 3926 const struct element *ssid; 3927 int ssid_len; 3928 3929 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3930 3931 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3932 ieee80211_vif_is_mld(&sdata->vif))) 3933 return NULL; 3934 3935 if (ifmgd->associated) 3936 cbss = sdata->deflink.conf->bss; 3937 else if (ifmgd->auth_data) 3938 cbss = ifmgd->auth_data->bss; 3939 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3940 cbss = ifmgd->assoc_data->link[0].bss; 3941 else 3942 return NULL; 3943 3944 rcu_read_lock(); 3945 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3946 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3947 "invalid SSID element (len=%d)", 3948 ssid ? ssid->datalen : -1)) 3949 ssid_len = 0; 3950 else 3951 ssid_len = ssid->datalen; 3952 3953 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3954 (u32) -1, cbss->channel, 3955 ssid->data, ssid_len, 3956 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3957 rcu_read_unlock(); 3958 3959 return skb; 3960 } 3961 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3962 3963 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3964 const u8 *buf, size_t len, bool tx, 3965 u16 reason, bool reconnect) 3966 { 3967 struct ieee80211_event event = { 3968 .type = MLME_EVENT, 3969 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3970 .u.mlme.reason = reason, 3971 }; 3972 3973 if (tx) 3974 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3975 else 3976 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3977 3978 drv_event_callback(sdata->local, sdata, &event); 3979 } 3980 3981 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3982 { 3983 struct ieee80211_local *local = sdata->local; 3984 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3985 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3986 bool tx = false; 3987 3988 lockdep_assert_wiphy(local->hw.wiphy); 3989 3990 if (!ifmgd->associated) 3991 return; 3992 3993 /* only transmit if we have a link that makes that worthwhile */ 3994 for (unsigned int link_id = 0; 3995 link_id < ARRAY_SIZE(sdata->link); 3996 link_id++) { 3997 struct ieee80211_link_data *link; 3998 3999 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4000 continue; 4001 4002 link = sdata_dereference(sdata->link[link_id], sdata); 4003 if (WARN_ON_ONCE(!link)) 4004 continue; 4005 4006 if (link->u.mgd.csa.blocked_tx) 4007 continue; 4008 4009 tx = true; 4010 break; 4011 } 4012 4013 if (!ifmgd->driver_disconnect) { 4014 unsigned int link_id; 4015 4016 /* 4017 * AP is probably out of range (or not reachable for another 4018 * reason) so remove the bss structs for that AP. In the case 4019 * of multi-link, it's not clear that all of them really are 4020 * out of range, but if they weren't the driver likely would 4021 * have switched to just have a single link active? 4022 */ 4023 for (link_id = 0; 4024 link_id < ARRAY_SIZE(sdata->link); 4025 link_id++) { 4026 struct ieee80211_link_data *link; 4027 4028 link = sdata_dereference(sdata->link[link_id], sdata); 4029 if (!link) 4030 continue; 4031 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4032 link->conf->bss = NULL; 4033 } 4034 } 4035 4036 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4037 ifmgd->driver_disconnect ? 4038 WLAN_REASON_DEAUTH_LEAVING : 4039 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4040 tx, frame_buf); 4041 /* the other links will be destroyed */ 4042 sdata->vif.bss_conf.csa_active = false; 4043 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4044 sdata->deflink.u.mgd.csa.blocked_tx = false; 4045 ieee80211_vif_unblock_queues_csa(sdata); 4046 4047 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 4048 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4049 ifmgd->reconnect); 4050 ifmgd->reconnect = false; 4051 } 4052 4053 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4054 struct wiphy_work *work) 4055 { 4056 struct ieee80211_sub_if_data *sdata = 4057 container_of(work, struct ieee80211_sub_if_data, 4058 u.mgd.beacon_connection_loss_work); 4059 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4060 4061 if (ifmgd->connection_loss) { 4062 sdata_info(sdata, "Connection to AP %pM lost\n", 4063 sdata->vif.cfg.ap_addr); 4064 __ieee80211_disconnect(sdata); 4065 ifmgd->connection_loss = false; 4066 } else if (ifmgd->driver_disconnect) { 4067 sdata_info(sdata, 4068 "Driver requested disconnection from AP %pM\n", 4069 sdata->vif.cfg.ap_addr); 4070 __ieee80211_disconnect(sdata); 4071 ifmgd->driver_disconnect = false; 4072 } else { 4073 if (ifmgd->associated) 4074 sdata->deflink.u.mgd.beacon_loss_count++; 4075 ieee80211_mgd_probe_ap(sdata, true); 4076 } 4077 } 4078 4079 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4080 struct wiphy_work *work) 4081 { 4082 struct ieee80211_sub_if_data *sdata = 4083 container_of(work, struct ieee80211_sub_if_data, 4084 u.mgd.csa_connection_drop_work); 4085 4086 __ieee80211_disconnect(sdata); 4087 } 4088 4089 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4090 { 4091 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4092 struct ieee80211_hw *hw = &sdata->local->hw; 4093 4094 trace_api_beacon_loss(sdata); 4095 4096 sdata->u.mgd.connection_loss = false; 4097 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4098 } 4099 EXPORT_SYMBOL(ieee80211_beacon_loss); 4100 4101 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4102 { 4103 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4104 struct ieee80211_hw *hw = &sdata->local->hw; 4105 4106 trace_api_connection_loss(sdata); 4107 4108 sdata->u.mgd.connection_loss = true; 4109 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4110 } 4111 EXPORT_SYMBOL(ieee80211_connection_loss); 4112 4113 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4114 { 4115 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4116 struct ieee80211_hw *hw = &sdata->local->hw; 4117 4118 trace_api_disconnect(sdata, reconnect); 4119 4120 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4121 return; 4122 4123 sdata->u.mgd.driver_disconnect = true; 4124 sdata->u.mgd.reconnect = reconnect; 4125 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4126 } 4127 EXPORT_SYMBOL(ieee80211_disconnect); 4128 4129 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4130 bool assoc) 4131 { 4132 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4133 4134 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4135 4136 if (!assoc) { 4137 /* 4138 * we are not authenticated yet, the only timer that could be 4139 * running is the timeout for the authentication response which 4140 * which is not relevant anymore. 4141 */ 4142 del_timer_sync(&sdata->u.mgd.timer); 4143 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4144 4145 /* other links are destroyed */ 4146 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4147 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4148 BSS_CHANGED_BSSID); 4149 sdata->u.mgd.flags = 0; 4150 4151 ieee80211_link_release_channel(&sdata->deflink); 4152 ieee80211_vif_set_links(sdata, 0, 0); 4153 } 4154 4155 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4156 kfree(auth_data); 4157 sdata->u.mgd.auth_data = NULL; 4158 } 4159 4160 enum assoc_status { 4161 ASSOC_SUCCESS, 4162 ASSOC_REJECTED, 4163 ASSOC_TIMEOUT, 4164 ASSOC_ABANDON, 4165 }; 4166 4167 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4168 enum assoc_status status) 4169 { 4170 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4171 4172 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4173 4174 if (status != ASSOC_SUCCESS) { 4175 /* 4176 * we are not associated yet, the only timer that could be 4177 * running is the timeout for the association response which 4178 * which is not relevant anymore. 4179 */ 4180 del_timer_sync(&sdata->u.mgd.timer); 4181 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4182 4183 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4184 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4185 BSS_CHANGED_BSSID); 4186 sdata->u.mgd.flags = 0; 4187 sdata->vif.bss_conf.mu_mimo_owner = false; 4188 4189 if (status != ASSOC_REJECTED) { 4190 struct cfg80211_assoc_failure data = { 4191 .timeout = status == ASSOC_TIMEOUT, 4192 }; 4193 int i; 4194 4195 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4196 ARRAY_SIZE(assoc_data->link)); 4197 4198 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4199 data.bss[i] = assoc_data->link[i].bss; 4200 4201 if (ieee80211_vif_is_mld(&sdata->vif)) 4202 data.ap_mld_addr = assoc_data->ap_addr; 4203 4204 cfg80211_assoc_failure(sdata->dev, &data); 4205 } 4206 4207 ieee80211_link_release_channel(&sdata->deflink); 4208 ieee80211_vif_set_links(sdata, 0, 0); 4209 } 4210 4211 kfree(assoc_data); 4212 sdata->u.mgd.assoc_data = NULL; 4213 } 4214 4215 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4216 struct ieee80211_mgmt *mgmt, size_t len) 4217 { 4218 struct ieee80211_local *local = sdata->local; 4219 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4220 const struct element *challenge; 4221 u8 *pos; 4222 u32 tx_flags = 0; 4223 struct ieee80211_prep_tx_info info = { 4224 .subtype = IEEE80211_STYPE_AUTH, 4225 .link_id = auth_data->link_id, 4226 }; 4227 4228 pos = mgmt->u.auth.variable; 4229 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4230 len - (pos - (u8 *)mgmt)); 4231 if (!challenge) 4232 return; 4233 auth_data->expected_transaction = 4; 4234 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4235 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4236 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4237 IEEE80211_TX_INTFL_MLME_CONN_TX; 4238 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4239 (void *)challenge, 4240 challenge->datalen + sizeof(*challenge), 4241 auth_data->ap_addr, auth_data->ap_addr, 4242 auth_data->key, auth_data->key_len, 4243 auth_data->key_idx, tx_flags); 4244 } 4245 4246 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4247 { 4248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4249 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4250 struct sta_info *sta; 4251 4252 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4253 4254 sdata_info(sdata, "authenticated\n"); 4255 ifmgd->auth_data->done = true; 4256 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4257 ifmgd->auth_data->timeout_started = true; 4258 run_again(sdata, ifmgd->auth_data->timeout); 4259 4260 /* move station state to auth */ 4261 sta = sta_info_get(sdata, ap_addr); 4262 if (!sta) { 4263 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4264 return false; 4265 } 4266 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4267 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4268 return false; 4269 } 4270 4271 return true; 4272 } 4273 4274 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4275 struct ieee80211_mgmt *mgmt, size_t len) 4276 { 4277 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4278 u16 auth_alg, auth_transaction, status_code; 4279 struct ieee80211_event event = { 4280 .type = MLME_EVENT, 4281 .u.mlme.data = AUTH_EVENT, 4282 }; 4283 struct ieee80211_prep_tx_info info = { 4284 .subtype = IEEE80211_STYPE_AUTH, 4285 }; 4286 4287 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4288 4289 if (len < 24 + 6) 4290 return; 4291 4292 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4293 return; 4294 4295 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4296 return; 4297 4298 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4299 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4300 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4301 4302 if (auth_alg != ifmgd->auth_data->algorithm || 4303 (auth_alg != WLAN_AUTH_SAE && 4304 auth_transaction != ifmgd->auth_data->expected_transaction) || 4305 (auth_alg == WLAN_AUTH_SAE && 4306 (auth_transaction < ifmgd->auth_data->expected_transaction || 4307 auth_transaction > 2))) { 4308 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4309 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4310 auth_transaction, 4311 ifmgd->auth_data->expected_transaction); 4312 goto notify_driver; 4313 } 4314 4315 if (status_code != WLAN_STATUS_SUCCESS) { 4316 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4317 4318 if (auth_alg == WLAN_AUTH_SAE && 4319 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4320 (auth_transaction == 1 && 4321 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4322 status_code == WLAN_STATUS_SAE_PK)))) { 4323 /* waiting for userspace now */ 4324 ifmgd->auth_data->waiting = true; 4325 ifmgd->auth_data->timeout = 4326 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4327 ifmgd->auth_data->timeout_started = true; 4328 run_again(sdata, ifmgd->auth_data->timeout); 4329 goto notify_driver; 4330 } 4331 4332 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4333 mgmt->sa, status_code); 4334 ieee80211_destroy_auth_data(sdata, false); 4335 event.u.mlme.status = MLME_DENIED; 4336 event.u.mlme.reason = status_code; 4337 drv_event_callback(sdata->local, sdata, &event); 4338 goto notify_driver; 4339 } 4340 4341 switch (ifmgd->auth_data->algorithm) { 4342 case WLAN_AUTH_OPEN: 4343 case WLAN_AUTH_LEAP: 4344 case WLAN_AUTH_FT: 4345 case WLAN_AUTH_SAE: 4346 case WLAN_AUTH_FILS_SK: 4347 case WLAN_AUTH_FILS_SK_PFS: 4348 case WLAN_AUTH_FILS_PK: 4349 break; 4350 case WLAN_AUTH_SHARED_KEY: 4351 if (ifmgd->auth_data->expected_transaction != 4) { 4352 ieee80211_auth_challenge(sdata, mgmt, len); 4353 /* need another frame */ 4354 return; 4355 } 4356 break; 4357 default: 4358 WARN_ONCE(1, "invalid auth alg %d", 4359 ifmgd->auth_data->algorithm); 4360 goto notify_driver; 4361 } 4362 4363 event.u.mlme.status = MLME_SUCCESS; 4364 info.success = 1; 4365 drv_event_callback(sdata->local, sdata, &event); 4366 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4367 (auth_transaction == 2 && 4368 ifmgd->auth_data->expected_transaction == 2)) { 4369 if (!ieee80211_mark_sta_auth(sdata)) 4370 return; /* ignore frame -- wait for timeout */ 4371 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4372 auth_transaction == 2) { 4373 sdata_info(sdata, "SAE peer confirmed\n"); 4374 ifmgd->auth_data->peer_confirmed = true; 4375 } 4376 4377 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4378 notify_driver: 4379 drv_mgd_complete_tx(sdata->local, sdata, &info); 4380 } 4381 4382 #define case_WLAN(type) \ 4383 case WLAN_REASON_##type: return #type 4384 4385 const char *ieee80211_get_reason_code_string(u16 reason_code) 4386 { 4387 switch (reason_code) { 4388 case_WLAN(UNSPECIFIED); 4389 case_WLAN(PREV_AUTH_NOT_VALID); 4390 case_WLAN(DEAUTH_LEAVING); 4391 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4392 case_WLAN(DISASSOC_AP_BUSY); 4393 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4394 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4395 case_WLAN(DISASSOC_STA_HAS_LEFT); 4396 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4397 case_WLAN(DISASSOC_BAD_POWER); 4398 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4399 case_WLAN(INVALID_IE); 4400 case_WLAN(MIC_FAILURE); 4401 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4402 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4403 case_WLAN(IE_DIFFERENT); 4404 case_WLAN(INVALID_GROUP_CIPHER); 4405 case_WLAN(INVALID_PAIRWISE_CIPHER); 4406 case_WLAN(INVALID_AKMP); 4407 case_WLAN(UNSUPP_RSN_VERSION); 4408 case_WLAN(INVALID_RSN_IE_CAP); 4409 case_WLAN(IEEE8021X_FAILED); 4410 case_WLAN(CIPHER_SUITE_REJECTED); 4411 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4412 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4413 case_WLAN(DISASSOC_LOW_ACK); 4414 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4415 case_WLAN(QSTA_LEAVE_QBSS); 4416 case_WLAN(QSTA_NOT_USE); 4417 case_WLAN(QSTA_REQUIRE_SETUP); 4418 case_WLAN(QSTA_TIMEOUT); 4419 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4420 case_WLAN(MESH_PEER_CANCELED); 4421 case_WLAN(MESH_MAX_PEERS); 4422 case_WLAN(MESH_CONFIG); 4423 case_WLAN(MESH_CLOSE); 4424 case_WLAN(MESH_MAX_RETRIES); 4425 case_WLAN(MESH_CONFIRM_TIMEOUT); 4426 case_WLAN(MESH_INVALID_GTK); 4427 case_WLAN(MESH_INCONSISTENT_PARAM); 4428 case_WLAN(MESH_INVALID_SECURITY); 4429 case_WLAN(MESH_PATH_ERROR); 4430 case_WLAN(MESH_PATH_NOFORWARD); 4431 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4432 case_WLAN(MAC_EXISTS_IN_MBSS); 4433 case_WLAN(MESH_CHAN_REGULATORY); 4434 case_WLAN(MESH_CHAN); 4435 default: return "<unknown>"; 4436 } 4437 } 4438 4439 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4440 struct ieee80211_mgmt *mgmt, size_t len) 4441 { 4442 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4443 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4444 4445 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4446 4447 if (len < 24 + 2) 4448 return; 4449 4450 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4451 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4452 return; 4453 } 4454 4455 if (ifmgd->associated && 4456 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4457 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4458 sdata->vif.cfg.ap_addr, reason_code, 4459 ieee80211_get_reason_code_string(reason_code)); 4460 4461 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4462 4463 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4464 reason_code, false); 4465 return; 4466 } 4467 4468 if (ifmgd->assoc_data && 4469 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4470 sdata_info(sdata, 4471 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4472 ifmgd->assoc_data->ap_addr, reason_code, 4473 ieee80211_get_reason_code_string(reason_code)); 4474 4475 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4476 4477 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4478 return; 4479 } 4480 } 4481 4482 4483 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4484 struct ieee80211_mgmt *mgmt, size_t len) 4485 { 4486 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4487 u16 reason_code; 4488 4489 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4490 4491 if (len < 24 + 2) 4492 return; 4493 4494 if (!ifmgd->associated || 4495 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4496 return; 4497 4498 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4499 4500 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4501 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4502 return; 4503 } 4504 4505 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4506 sdata->vif.cfg.ap_addr, reason_code, 4507 ieee80211_get_reason_code_string(reason_code)); 4508 4509 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4510 4511 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4512 false); 4513 } 4514 4515 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4516 u8 *supp_rates, unsigned int supp_rates_len, 4517 u32 *rates, u32 *basic_rates, 4518 bool *have_higher_than_11mbit, 4519 int *min_rate, int *min_rate_index) 4520 { 4521 int i, j; 4522 4523 for (i = 0; i < supp_rates_len; i++) { 4524 int rate = supp_rates[i] & 0x7f; 4525 bool is_basic = !!(supp_rates[i] & 0x80); 4526 4527 if ((rate * 5) > 110) 4528 *have_higher_than_11mbit = true; 4529 4530 /* 4531 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4532 * selectors since they're not rates. 4533 * 4534 * Note: Even though the membership selector and the basic 4535 * rate flag share the same bit, they are not exactly 4536 * the same. 4537 */ 4538 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4539 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4540 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4541 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4542 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4543 continue; 4544 4545 for (j = 0; j < sband->n_bitrates; j++) { 4546 struct ieee80211_rate *br; 4547 int brate; 4548 4549 br = &sband->bitrates[j]; 4550 4551 brate = DIV_ROUND_UP(br->bitrate, 5); 4552 if (brate == rate) { 4553 *rates |= BIT(j); 4554 if (is_basic) 4555 *basic_rates |= BIT(j); 4556 if ((rate * 5) < *min_rate) { 4557 *min_rate = rate * 5; 4558 *min_rate_index = j; 4559 } 4560 break; 4561 } 4562 } 4563 } 4564 } 4565 4566 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4567 struct ieee80211_supported_band *sband, 4568 const struct link_sta_info *link_sta, 4569 const struct ieee802_11_elems *elems) 4570 { 4571 const struct ieee80211_sta_he_cap *own_he_cap = 4572 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4573 4574 if (elems->ext_capab_len < 10) 4575 return false; 4576 4577 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4578 return false; 4579 4580 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4581 IEEE80211_HE_MAC_CAP0_TWT_RES && 4582 own_he_cap && 4583 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4584 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4585 } 4586 4587 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4588 struct ieee80211_supported_band *sband, 4589 struct ieee80211_link_data *link, 4590 struct link_sta_info *link_sta, 4591 struct ieee802_11_elems *elems) 4592 { 4593 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4594 4595 if (link->conf->twt_requester != twt) { 4596 link->conf->twt_requester = twt; 4597 return BSS_CHANGED_TWT; 4598 } 4599 return 0; 4600 } 4601 4602 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4603 struct ieee80211_bss_conf *bss_conf, 4604 struct ieee80211_supported_band *sband, 4605 struct link_sta_info *link_sta) 4606 { 4607 const struct ieee80211_sta_he_cap *own_he_cap = 4608 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4609 4610 return bss_conf->he_support && 4611 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4612 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4613 own_he_cap && 4614 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4615 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4616 } 4617 4618 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4619 struct link_sta_info *link_sta, 4620 struct cfg80211_bss *cbss, 4621 struct ieee80211_mgmt *mgmt, 4622 const u8 *elem_start, 4623 unsigned int elem_len, 4624 u64 *changed) 4625 { 4626 struct ieee80211_sub_if_data *sdata = link->sdata; 4627 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4628 struct ieee80211_bss_conf *bss_conf = link->conf; 4629 struct ieee80211_local *local = sdata->local; 4630 unsigned int link_id = link->link_id; 4631 struct ieee80211_elems_parse_params parse_params = { 4632 .mode = link->u.mgd.conn.mode, 4633 .start = elem_start, 4634 .len = elem_len, 4635 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4636 .from_ap = true, 4637 }; 4638 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4639 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4640 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4641 const struct cfg80211_bss_ies *bss_ies = NULL; 4642 struct ieee80211_supported_band *sband; 4643 struct ieee802_11_elems *elems; 4644 const __le16 prof_bss_param_ch_present = 4645 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4646 u16 capab_info; 4647 bool ret; 4648 4649 elems = ieee802_11_parse_elems_full(&parse_params); 4650 if (!elems) 4651 return false; 4652 4653 if (link_id == assoc_data->assoc_link_id) { 4654 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4655 4656 /* 4657 * we should not get to this flow unless the association was 4658 * successful, so set the status directly to success 4659 */ 4660 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4661 if (elems->ml_basic) { 4662 int bss_param_ch_cnt = 4663 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4664 4665 if (bss_param_ch_cnt < 0) { 4666 ret = false; 4667 goto out; 4668 } 4669 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; 4670 } 4671 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4672 !elems->prof || 4673 !(elems->prof->control & prof_bss_param_ch_present)) { 4674 ret = false; 4675 goto out; 4676 } else { 4677 const u8 *ptr = elems->prof->variable + 4678 elems->prof->sta_info_len - 1; 4679 4680 /* 4681 * During parsing, we validated that these fields exist, 4682 * otherwise elems->prof would have been set to NULL. 4683 */ 4684 capab_info = get_unaligned_le16(ptr); 4685 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4686 link->u.mgd.bss_param_ch_cnt = 4687 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4688 4689 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4690 link_info(link, "association response status code=%u\n", 4691 assoc_data->link[link_id].status); 4692 ret = true; 4693 goto out; 4694 } 4695 } 4696 4697 if (!is_s1g && !elems->supp_rates) { 4698 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4699 ret = false; 4700 goto out; 4701 } 4702 4703 link->u.mgd.tdls_chan_switch_prohibited = 4704 elems->ext_capab && elems->ext_capab_len >= 5 && 4705 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4706 4707 /* 4708 * Some APs are erroneously not including some information in their 4709 * (re)association response frames. Try to recover by using the data 4710 * from the beacon or probe response. This seems to afflict mobile 4711 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4712 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4713 */ 4714 if (!is_6ghz && 4715 ((assoc_data->wmm && !elems->wmm_param) || 4716 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4717 (!elems->ht_cap_elem || !elems->ht_operation)) || 4718 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4719 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4720 const struct cfg80211_bss_ies *ies; 4721 struct ieee802_11_elems *bss_elems; 4722 4723 rcu_read_lock(); 4724 ies = rcu_dereference(cbss->ies); 4725 if (ies) 4726 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4727 GFP_ATOMIC); 4728 rcu_read_unlock(); 4729 if (!bss_ies) { 4730 ret = false; 4731 goto out; 4732 } 4733 4734 parse_params.start = bss_ies->data; 4735 parse_params.len = bss_ies->len; 4736 parse_params.bss = cbss; 4737 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4738 if (!bss_elems) { 4739 ret = false; 4740 goto out; 4741 } 4742 4743 if (assoc_data->wmm && 4744 !elems->wmm_param && bss_elems->wmm_param) { 4745 elems->wmm_param = bss_elems->wmm_param; 4746 sdata_info(sdata, 4747 "AP bug: WMM param missing from AssocResp\n"); 4748 } 4749 4750 /* 4751 * Also check if we requested HT/VHT, otherwise the AP doesn't 4752 * have to include the IEs in the (re)association response. 4753 */ 4754 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4755 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4756 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4757 sdata_info(sdata, 4758 "AP bug: HT capability missing from AssocResp\n"); 4759 } 4760 if (!elems->ht_operation && bss_elems->ht_operation && 4761 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4762 elems->ht_operation = bss_elems->ht_operation; 4763 sdata_info(sdata, 4764 "AP bug: HT operation missing from AssocResp\n"); 4765 } 4766 4767 if (is_5ghz) { 4768 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4769 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4770 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4771 sdata_info(sdata, 4772 "AP bug: VHT capa missing from AssocResp\n"); 4773 } 4774 4775 if (!elems->vht_operation && bss_elems->vht_operation && 4776 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4777 elems->vht_operation = bss_elems->vht_operation; 4778 sdata_info(sdata, 4779 "AP bug: VHT operation missing from AssocResp\n"); 4780 } 4781 } 4782 kfree(bss_elems); 4783 } 4784 4785 /* 4786 * We previously checked these in the beacon/probe response, so 4787 * they should be present here. This is just a safety net. 4788 * Note that the ieee80211_config_bw() below would also check 4789 * for this (and more), but this has better error reporting. 4790 */ 4791 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4792 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4793 sdata_info(sdata, 4794 "HT AP is missing WMM params or HT capability/operation\n"); 4795 ret = false; 4796 goto out; 4797 } 4798 4799 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4800 (!elems->vht_cap_elem || !elems->vht_operation)) { 4801 sdata_info(sdata, 4802 "VHT AP is missing VHT capability/operation\n"); 4803 ret = false; 4804 goto out; 4805 } 4806 4807 /* check/update if AP changed anything in assoc response vs. scan */ 4808 if (ieee80211_config_bw(link, elems, 4809 link_id == assoc_data->assoc_link_id, 4810 changed)) { 4811 ret = false; 4812 goto out; 4813 } 4814 4815 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4816 ret = false; 4817 goto out; 4818 } 4819 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4820 4821 /* Set up internal HT/VHT capabilities */ 4822 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4823 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4824 elems->ht_cap_elem, 4825 link_sta); 4826 4827 if (elems->vht_cap_elem && 4828 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4829 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4830 const struct cfg80211_bss_ies *ies; 4831 4832 /* 4833 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4834 * too large maximum MPDU length in the association response 4835 * (indicating 12k) that it cannot actually process ... 4836 * Work around that. 4837 */ 4838 rcu_read_lock(); 4839 ies = rcu_dereference(cbss->ies); 4840 if (ies) { 4841 const struct element *elem; 4842 4843 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4844 ies->data, ies->len); 4845 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4846 bss_vht_cap = (const void *)elem->data; 4847 } 4848 4849 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4850 elems->vht_cap_elem, 4851 bss_vht_cap, link_sta); 4852 rcu_read_unlock(); 4853 } 4854 4855 if (elems->he_operation && 4856 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4857 elems->he_cap) { 4858 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4859 elems->he_cap, 4860 elems->he_cap_len, 4861 elems->he_6ghz_capa, 4862 link_sta); 4863 4864 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4865 if (elems->rsnx && elems->rsnx_len && 4866 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4867 wiphy_ext_feature_isset(local->hw.wiphy, 4868 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4869 bss_conf->twt_protected = true; 4870 else 4871 bss_conf->twt_protected = false; 4872 4873 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4874 link_sta, elems); 4875 4876 if (elems->eht_operation && elems->eht_cap && 4877 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4878 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4879 elems->he_cap, 4880 elems->he_cap_len, 4881 elems->eht_cap, 4882 elems->eht_cap_len, 4883 link_sta); 4884 4885 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4886 } else { 4887 bss_conf->eht_support = false; 4888 } 4889 } else { 4890 bss_conf->he_support = false; 4891 bss_conf->twt_requester = false; 4892 bss_conf->twt_protected = false; 4893 bss_conf->eht_support = false; 4894 } 4895 4896 bss_conf->twt_broadcast = 4897 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4898 4899 if (bss_conf->he_support) { 4900 bss_conf->he_bss_color.color = 4901 le32_get_bits(elems->he_operation->he_oper_params, 4902 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4903 bss_conf->he_bss_color.partial = 4904 le32_get_bits(elems->he_operation->he_oper_params, 4905 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4906 bss_conf->he_bss_color.enabled = 4907 !le32_get_bits(elems->he_operation->he_oper_params, 4908 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4909 4910 if (bss_conf->he_bss_color.enabled) 4911 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4912 4913 bss_conf->htc_trig_based_pkt_ext = 4914 le32_get_bits(elems->he_operation->he_oper_params, 4915 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4916 bss_conf->frame_time_rts_th = 4917 le32_get_bits(elems->he_operation->he_oper_params, 4918 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4919 4920 bss_conf->uora_exists = !!elems->uora_element; 4921 if (elems->uora_element) 4922 bss_conf->uora_ocw_range = elems->uora_element[0]; 4923 4924 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4925 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4926 /* TODO: OPEN: what happens if BSS color disable is set? */ 4927 } 4928 4929 if (cbss->transmitted_bss) { 4930 bss_conf->nontransmitted = true; 4931 ether_addr_copy(bss_conf->transmitter_bssid, 4932 cbss->transmitted_bss->bssid); 4933 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4934 bss_conf->bssid_index = cbss->bssid_index; 4935 } 4936 4937 /* 4938 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4939 * in their association response, so ignore that data for our own 4940 * configuration. If it changed since the last beacon, we'll get the 4941 * next beacon and update then. 4942 */ 4943 4944 /* 4945 * If an operating mode notification IE is present, override the 4946 * NSS calculation (that would be done in rate_control_rate_init()) 4947 * and use the # of streams from that element. 4948 */ 4949 if (elems->opmode_notif && 4950 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4951 u8 nss; 4952 4953 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4954 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4955 nss += 1; 4956 link_sta->pub->rx_nss = nss; 4957 } 4958 4959 /* 4960 * Always handle WMM once after association regardless 4961 * of the first value the AP uses. Setting -1 here has 4962 * that effect because the AP values is an unsigned 4963 * 4-bit value. 4964 */ 4965 link->u.mgd.wmm_last_param_set = -1; 4966 link->u.mgd.mu_edca_last_param_set = -1; 4967 4968 if (link->u.mgd.disable_wmm_tracking) { 4969 ieee80211_set_wmm_default(link, false, false); 4970 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4971 elems->wmm_param_len, 4972 elems->mu_edca_param_set)) { 4973 /* still enable QoS since we might have HT/VHT */ 4974 ieee80211_set_wmm_default(link, false, true); 4975 /* disable WMM tracking in this case to disable 4976 * tracking WMM parameter changes in the beacon if 4977 * the parameters weren't actually valid. Doing so 4978 * avoids changing parameters very strangely when 4979 * the AP is going back and forth between valid and 4980 * invalid parameters. 4981 */ 4982 link->u.mgd.disable_wmm_tracking = true; 4983 } 4984 4985 if (elems->max_idle_period_ie) { 4986 bss_conf->max_idle_period = 4987 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4988 bss_conf->protected_keep_alive = 4989 !!(elems->max_idle_period_ie->idle_options & 4990 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4991 *changed |= BSS_CHANGED_KEEP_ALIVE; 4992 } else { 4993 bss_conf->max_idle_period = 0; 4994 bss_conf->protected_keep_alive = false; 4995 } 4996 4997 /* set assoc capability (AID was already set earlier), 4998 * ieee80211_set_associated() will tell the driver */ 4999 bss_conf->assoc_capability = capab_info; 5000 5001 ret = true; 5002 out: 5003 kfree(elems); 5004 kfree(bss_ies); 5005 return ret; 5006 } 5007 5008 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5009 struct sta_info *sta, 5010 struct link_sta_info *link_sta, 5011 struct cfg80211_bss *cbss) 5012 { 5013 struct ieee80211_sub_if_data *sdata = link->sdata; 5014 struct ieee80211_local *local = sdata->local; 5015 struct ieee80211_bss *bss = (void *)cbss->priv; 5016 u32 rates = 0, basic_rates = 0; 5017 bool have_higher_than_11mbit = false; 5018 int min_rate = INT_MAX, min_rate_index = -1; 5019 struct ieee80211_supported_band *sband; 5020 5021 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5022 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5023 5024 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5025 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5026 ieee80211_s1g_sta_rate_init(sta); 5027 return 0; 5028 } 5029 5030 sband = local->hw.wiphy->bands[cbss->channel->band]; 5031 5032 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5033 &rates, &basic_rates, &have_higher_than_11mbit, 5034 &min_rate, &min_rate_index); 5035 5036 /* 5037 * This used to be a workaround for basic rates missing 5038 * in the association response frame. Now that we no 5039 * longer use the basic rates from there, it probably 5040 * doesn't happen any more, but keep the workaround so 5041 * in case some *other* APs are buggy in different ways 5042 * we can connect -- with a warning. 5043 * Allow this workaround only in case the AP provided at least 5044 * one rate. 5045 */ 5046 if (min_rate_index < 0) { 5047 link_info(link, "No legacy rates in association response\n"); 5048 return -EINVAL; 5049 } else if (!basic_rates) { 5050 link_info(link, "No basic rates, using min rate instead\n"); 5051 basic_rates = BIT(min_rate_index); 5052 } 5053 5054 if (rates) 5055 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5056 else 5057 link_info(link, "No rates found, keeping mandatory only\n"); 5058 5059 link->conf->basic_rates = basic_rates; 5060 5061 /* cf. IEEE 802.11 9.2.12 */ 5062 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5063 have_higher_than_11mbit; 5064 5065 return 0; 5066 } 5067 5068 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5069 struct cfg80211_bss *cbss) 5070 { 5071 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5072 const struct element *ht_cap_elem, *vht_cap_elem; 5073 const struct cfg80211_bss_ies *ies; 5074 const struct ieee80211_ht_cap *ht_cap; 5075 const struct ieee80211_vht_cap *vht_cap; 5076 const struct ieee80211_he_cap_elem *he_cap; 5077 const struct element *he_cap_elem; 5078 u16 mcs_80_map, mcs_160_map; 5079 int i, mcs_nss_size; 5080 bool support_160; 5081 u8 chains = 1; 5082 5083 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5084 return chains; 5085 5086 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5087 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5088 ht_cap = (void *)ht_cap_elem->data; 5089 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5090 /* 5091 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5092 * "Tx Unequal Modulation Supported" fields. 5093 */ 5094 } 5095 5096 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5097 return chains; 5098 5099 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5100 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5101 u8 nss; 5102 u16 tx_mcs_map; 5103 5104 vht_cap = (void *)vht_cap_elem->data; 5105 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5106 for (nss = 8; nss > 0; nss--) { 5107 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5108 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5109 break; 5110 } 5111 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5112 chains = max(chains, nss); 5113 } 5114 5115 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5116 return chains; 5117 5118 ies = rcu_dereference(cbss->ies); 5119 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5120 ies->data, ies->len); 5121 5122 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5123 return chains; 5124 5125 /* skip one byte ext_tag_id */ 5126 he_cap = (void *)(he_cap_elem->data + 1); 5127 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5128 5129 /* invalid HE IE */ 5130 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5131 return chains; 5132 5133 /* mcs_nss is right after he_cap info */ 5134 he_mcs_nss_supp = (void *)(he_cap + 1); 5135 5136 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5137 5138 for (i = 7; i >= 0; i--) { 5139 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5140 5141 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5142 chains = max_t(u8, chains, i + 1); 5143 break; 5144 } 5145 } 5146 5147 support_160 = he_cap->phy_cap_info[0] & 5148 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5149 5150 if (!support_160) 5151 return chains; 5152 5153 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5154 for (i = 7; i >= 0; i--) { 5155 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5156 5157 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5158 chains = max_t(u8, chains, i + 1); 5159 break; 5160 } 5161 } 5162 5163 return chains; 5164 } 5165 5166 static void 5167 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5168 struct ieee80211_supported_band *sband, 5169 struct cfg80211_assoc_request *req, 5170 bool wmm_used, int link_id, 5171 struct ieee80211_conn_settings *conn) 5172 { 5173 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5174 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5175 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5176 const struct ieee80211_sta_he_cap *he_cap; 5177 const struct ieee80211_sta_eht_cap *eht_cap; 5178 struct ieee80211_sta_vht_cap vht_cap; 5179 5180 if (sband->band == NL80211_BAND_S1GHZ) { 5181 conn->mode = IEEE80211_CONN_MODE_S1G; 5182 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5183 mlme_dbg(sdata, "operating as S1G STA\n"); 5184 return; 5185 } 5186 5187 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5188 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5189 5190 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5191 5192 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5193 mlme_link_id_dbg(sdata, link_id, 5194 "HT disabled by flag, limiting to legacy\n"); 5195 goto out; 5196 } 5197 5198 if (!wmm_used) { 5199 mlme_link_id_dbg(sdata, link_id, 5200 "WMM/QoS not supported, limiting to legacy\n"); 5201 goto out; 5202 } 5203 5204 if (req) { 5205 unsigned int i; 5206 5207 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5208 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5209 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5210 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5211 netdev_info(sdata->dev, 5212 "WEP/TKIP use, limiting to legacy\n"); 5213 goto out; 5214 } 5215 } 5216 } 5217 5218 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5219 mlme_link_id_dbg(sdata, link_id, 5220 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5221 goto out; 5222 } 5223 5224 /* HT is fine */ 5225 conn->mode = IEEE80211_CONN_MODE_HT; 5226 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5227 IEEE80211_CONN_BW_LIMIT_40 : 5228 IEEE80211_CONN_BW_LIMIT_20; 5229 5230 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5231 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5232 5233 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5234 mlme_link_id_dbg(sdata, link_id, 5235 "VHT disabled by flag, limiting to HT\n"); 5236 goto out; 5237 } 5238 5239 if (vht_cap.vht_supported && is_5ghz) { 5240 bool have_80mhz = false; 5241 unsigned int i; 5242 5243 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5244 mlme_link_id_dbg(sdata, link_id, 5245 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5246 goto out; 5247 } 5248 5249 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5250 for (i = 0; i < sband->n_channels; i++) { 5251 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5252 IEEE80211_CHAN_NO_80MHZ)) 5253 continue; 5254 5255 have_80mhz = true; 5256 break; 5257 } 5258 5259 if (!have_80mhz) { 5260 mlme_link_id_dbg(sdata, link_id, 5261 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5262 goto out; 5263 } 5264 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5265 mlme_link_id_dbg(sdata, link_id, 5266 "no VHT support on 5 GHz, limiting to HT\n"); 5267 goto out; 5268 } 5269 5270 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5271 if (sband->band != NL80211_BAND_2GHZ) { 5272 conn->mode = IEEE80211_CONN_MODE_VHT; 5273 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5274 } 5275 5276 if (is_5ghz && 5277 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5278 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5279 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5280 mlme_link_id_dbg(sdata, link_id, 5281 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5282 } 5283 5284 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5285 mlme_link_id_dbg(sdata, link_id, 5286 "HE disabled by flag, limiting to HT/VHT\n"); 5287 goto out; 5288 } 5289 5290 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5291 if (!he_cap) { 5292 WARN_ON(is_6ghz); 5293 mlme_link_id_dbg(sdata, link_id, 5294 "no HE support, limiting to HT/VHT\n"); 5295 goto out; 5296 } 5297 5298 /* so we have HE */ 5299 conn->mode = IEEE80211_CONN_MODE_HE; 5300 5301 /* check bandwidth */ 5302 switch (sband->band) { 5303 default: 5304 case NL80211_BAND_2GHZ: 5305 if (he_cap->he_cap_elem.phy_cap_info[0] & 5306 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5307 break; 5308 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5309 mlme_link_id_dbg(sdata, link_id, 5310 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5311 break; 5312 case NL80211_BAND_5GHZ: 5313 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5314 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5315 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5316 mlme_link_id_dbg(sdata, link_id, 5317 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5318 break; 5319 } 5320 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5321 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5322 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5323 conn->bw_limit, 5324 IEEE80211_CONN_BW_LIMIT_80); 5325 mlme_link_id_dbg(sdata, link_id, 5326 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5327 } 5328 break; 5329 case NL80211_BAND_6GHZ: 5330 if (he_cap->he_cap_elem.phy_cap_info[0] & 5331 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5332 break; 5333 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5334 conn->bw_limit, 5335 IEEE80211_CONN_BW_LIMIT_80); 5336 mlme_link_id_dbg(sdata, link_id, 5337 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5338 break; 5339 } 5340 5341 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5342 mlme_link_id_dbg(sdata, link_id, 5343 "EHT disabled by flag, limiting to HE\n"); 5344 goto out; 5345 } 5346 5347 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5348 if (!eht_cap) { 5349 mlme_link_id_dbg(sdata, link_id, 5350 "no EHT support, limiting to HE\n"); 5351 goto out; 5352 } 5353 5354 /* we have EHT */ 5355 5356 conn->mode = IEEE80211_CONN_MODE_EHT; 5357 5358 /* check bandwidth */ 5359 if (is_6ghz && 5360 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5361 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5362 else if (is_6ghz) 5363 mlme_link_id_dbg(sdata, link_id, 5364 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5365 5366 out: 5367 mlme_link_id_dbg(sdata, link_id, 5368 "determined local STA to be %s, BW limited to %d MHz\n", 5369 ieee80211_conn_mode_str(conn->mode), 5370 20 * (1 << conn->bw_limit)); 5371 } 5372 5373 static void 5374 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5375 struct ieee80211_supported_band *sband, 5376 struct cfg80211_auth_request *req, 5377 bool wmm_used, 5378 struct ieee80211_conn_settings *conn) 5379 { 5380 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5381 req->link_id > 0 ? req->link_id : 0, 5382 conn); 5383 } 5384 5385 static void 5386 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5387 struct ieee80211_supported_band *sband, 5388 struct cfg80211_assoc_request *req, 5389 bool wmm_used, int link_id, 5390 struct ieee80211_conn_settings *conn) 5391 { 5392 struct ieee80211_conn_settings tmp; 5393 5394 WARN_ON(!req); 5395 5396 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5397 &tmp); 5398 5399 conn->mode = min_t(enum ieee80211_conn_mode, 5400 conn->mode, tmp.mode); 5401 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5402 conn->bw_limit, tmp.bw_limit); 5403 } 5404 5405 static enum ieee80211_ap_reg_power 5406 ieee80211_ap_power_type(u8 control) 5407 { 5408 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5409 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5410 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5411 return IEEE80211_REG_LPI_AP; 5412 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5413 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5414 return IEEE80211_REG_SP_AP; 5415 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5416 return IEEE80211_REG_VLP_AP; 5417 default: 5418 return IEEE80211_REG_UNSET_AP; 5419 } 5420 } 5421 5422 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5423 struct ieee80211_link_data *link, 5424 int link_id, 5425 struct cfg80211_bss *cbss, bool mlo, 5426 struct ieee80211_conn_settings *conn) 5427 { 5428 struct ieee80211_local *local = sdata->local; 5429 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5430 struct ieee80211_chan_req chanreq = {}; 5431 struct cfg80211_chan_def ap_chandef; 5432 struct ieee802_11_elems *elems; 5433 int ret; 5434 5435 lockdep_assert_wiphy(local->hw.wiphy); 5436 5437 rcu_read_lock(); 5438 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5439 &chanreq, &ap_chandef); 5440 5441 if (IS_ERR(elems)) { 5442 rcu_read_unlock(); 5443 return PTR_ERR(elems); 5444 } 5445 5446 if (mlo && !elems->ml_basic) { 5447 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5448 rcu_read_unlock(); 5449 kfree(elems); 5450 return -EINVAL; 5451 } 5452 5453 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5454 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5455 5456 if (elems->pwr_constr_elem) 5457 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5458 5459 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5460 if (he_6ghz_oper) 5461 link->conf->power_type = 5462 ieee80211_ap_power_type(he_6ghz_oper->control); 5463 else 5464 link_info(link, 5465 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5466 cbss->channel->center_freq); 5467 5468 link->conf->tpe = elems->tpe; 5469 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5470 &chanreq.oper); 5471 } 5472 rcu_read_unlock(); 5473 /* the element data was RCU protected so no longer valid anyway */ 5474 kfree(elems); 5475 elems = NULL; 5476 5477 if (!link) 5478 return 0; 5479 5480 rcu_read_lock(); 5481 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5482 local->rx_chains); 5483 rcu_read_unlock(); 5484 5485 /* 5486 * If this fails (possibly due to channel context sharing 5487 * on incompatible channels, e.g. 80+80 and 160 sharing the 5488 * same control channel) try to use a smaller bandwidth. 5489 */ 5490 ret = ieee80211_link_use_channel(link, &chanreq, 5491 IEEE80211_CHANCTX_SHARED); 5492 5493 /* don't downgrade for 5 and 10 MHz channels, though. */ 5494 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5495 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5496 return ret; 5497 5498 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5499 ieee80211_chanreq_downgrade(&chanreq, conn); 5500 5501 ret = ieee80211_link_use_channel(link, &chanreq, 5502 IEEE80211_CHANCTX_SHARED); 5503 } 5504 5505 return ret; 5506 } 5507 5508 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5509 u8 *dtim_count, u8 *dtim_period) 5510 { 5511 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5512 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5513 ies->len); 5514 const struct ieee80211_tim_ie *tim = NULL; 5515 const struct ieee80211_bssid_index *idx; 5516 bool valid = tim_ie && tim_ie[1] >= 2; 5517 5518 if (valid) 5519 tim = (void *)(tim_ie + 2); 5520 5521 if (dtim_count) 5522 *dtim_count = valid ? tim->dtim_count : 0; 5523 5524 if (dtim_period) 5525 *dtim_period = valid ? tim->dtim_period : 0; 5526 5527 /* Check if value is overridden by non-transmitted profile */ 5528 if (!idx_ie || idx_ie[1] < 3) 5529 return valid; 5530 5531 idx = (void *)(idx_ie + 2); 5532 5533 if (dtim_count) 5534 *dtim_count = idx->dtim_count; 5535 5536 if (dtim_period) 5537 *dtim_period = idx->dtim_period; 5538 5539 return true; 5540 } 5541 5542 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5543 struct ieee80211_mgmt *mgmt, 5544 struct ieee802_11_elems *elems, 5545 const u8 *elem_start, unsigned int elem_len) 5546 { 5547 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5548 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5549 struct ieee80211_local *local = sdata->local; 5550 unsigned int link_id; 5551 struct sta_info *sta; 5552 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5553 u16 valid_links = 0, dormant_links = 0; 5554 int err; 5555 5556 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5557 /* 5558 * station info was already allocated and inserted before 5559 * the association and should be available to us 5560 */ 5561 sta = sta_info_get(sdata, assoc_data->ap_addr); 5562 if (WARN_ON(!sta)) 5563 goto out_err; 5564 5565 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5566 5567 if (ieee80211_vif_is_mld(&sdata->vif)) { 5568 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5569 if (!assoc_data->link[link_id].bss) 5570 continue; 5571 5572 valid_links |= BIT(link_id); 5573 if (assoc_data->link[link_id].disabled) 5574 dormant_links |= BIT(link_id); 5575 5576 if (link_id != assoc_data->assoc_link_id) { 5577 err = ieee80211_sta_allocate_link(sta, link_id); 5578 if (err) 5579 goto out_err; 5580 } 5581 } 5582 5583 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5584 } 5585 5586 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5587 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5588 struct ieee80211_link_data *link; 5589 struct link_sta_info *link_sta; 5590 5591 if (!cbss) 5592 continue; 5593 5594 link = sdata_dereference(sdata->link[link_id], sdata); 5595 if (WARN_ON(!link)) 5596 goto out_err; 5597 5598 if (ieee80211_vif_is_mld(&sdata->vif)) 5599 link_info(link, 5600 "local address %pM, AP link address %pM%s\n", 5601 link->conf->addr, 5602 assoc_data->link[link_id].bss->bssid, 5603 link_id == assoc_data->assoc_link_id ? 5604 " (assoc)" : ""); 5605 5606 link_sta = rcu_dereference_protected(sta->link[link_id], 5607 lockdep_is_held(&local->hw.wiphy->mtx)); 5608 if (WARN_ON(!link_sta)) 5609 goto out_err; 5610 5611 if (!link->u.mgd.have_beacon) { 5612 const struct cfg80211_bss_ies *ies; 5613 5614 rcu_read_lock(); 5615 ies = rcu_dereference(cbss->beacon_ies); 5616 if (ies) 5617 link->u.mgd.have_beacon = true; 5618 else 5619 ies = rcu_dereference(cbss->ies); 5620 ieee80211_get_dtim(ies, 5621 &link->conf->sync_dtim_count, 5622 &link->u.mgd.dtim_period); 5623 link->conf->beacon_int = cbss->beacon_interval; 5624 rcu_read_unlock(); 5625 } 5626 5627 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5628 5629 if (link_id != assoc_data->assoc_link_id) { 5630 link->u.mgd.conn = assoc_data->link[link_id].conn; 5631 5632 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5633 true, &link->u.mgd.conn); 5634 if (err) { 5635 link_info(link, "prep_channel failed\n"); 5636 goto out_err; 5637 } 5638 } 5639 5640 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5641 assoc_data->link[link_id].bss); 5642 if (err) 5643 goto out_err; 5644 5645 if (!ieee80211_assoc_config_link(link, link_sta, 5646 assoc_data->link[link_id].bss, 5647 mgmt, elem_start, elem_len, 5648 &changed[link_id])) 5649 goto out_err; 5650 5651 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5652 valid_links &= ~BIT(link_id); 5653 ieee80211_sta_remove_link(sta, link_id); 5654 continue; 5655 } 5656 5657 if (link_id != assoc_data->assoc_link_id) { 5658 err = ieee80211_sta_activate_link(sta, link_id); 5659 if (err) 5660 goto out_err; 5661 } 5662 } 5663 5664 /* links might have changed due to rejected ones, set them again */ 5665 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5666 5667 rate_control_rate_init(sta); 5668 5669 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5670 set_sta_flag(sta, WLAN_STA_MFP); 5671 sta->sta.mfp = true; 5672 } else { 5673 sta->sta.mfp = false; 5674 } 5675 5676 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5677 elems->ext_capab_len); 5678 5679 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5680 local->hw.queues >= IEEE80211_NUM_ACS; 5681 5682 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5683 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5684 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5685 if (err) { 5686 sdata_info(sdata, 5687 "failed to move station %pM to desired state\n", 5688 sta->sta.addr); 5689 WARN_ON(__sta_info_destroy(sta)); 5690 goto out_err; 5691 } 5692 5693 if (sdata->wdev.use_4addr) 5694 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5695 5696 ieee80211_set_associated(sdata, assoc_data, changed); 5697 5698 /* 5699 * If we're using 4-addr mode, let the AP know that we're 5700 * doing so, so that it can create the STA VLAN on its side 5701 */ 5702 if (ifmgd->use_4addr) 5703 ieee80211_send_4addr_nullfunc(local, sdata); 5704 5705 /* 5706 * Start timer to probe the connection to the AP now. 5707 * Also start the timer that will detect beacon loss. 5708 */ 5709 ieee80211_sta_reset_beacon_monitor(sdata); 5710 ieee80211_sta_reset_conn_monitor(sdata); 5711 5712 return true; 5713 out_err: 5714 eth_zero_addr(sdata->vif.cfg.ap_addr); 5715 return false; 5716 } 5717 5718 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5719 struct ieee80211_mgmt *mgmt, 5720 size_t len) 5721 { 5722 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5723 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5724 u16 capab_info, status_code, aid; 5725 struct ieee80211_elems_parse_params parse_params = { 5726 .bss = NULL, 5727 .link_id = -1, 5728 .from_ap = true, 5729 }; 5730 struct ieee802_11_elems *elems; 5731 int ac; 5732 const u8 *elem_start; 5733 unsigned int elem_len; 5734 bool reassoc; 5735 struct ieee80211_event event = { 5736 .type = MLME_EVENT, 5737 .u.mlme.data = ASSOC_EVENT, 5738 }; 5739 struct ieee80211_prep_tx_info info = {}; 5740 struct cfg80211_rx_assoc_resp_data resp = { 5741 .uapsd_queues = -1, 5742 }; 5743 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5744 unsigned int link_id; 5745 5746 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5747 5748 if (!assoc_data) 5749 return; 5750 5751 parse_params.mode = 5752 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5753 5754 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5755 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5756 return; 5757 5758 /* 5759 * AssocResp and ReassocResp have identical structure, so process both 5760 * of them in this function. 5761 */ 5762 5763 if (len < 24 + 6) 5764 return; 5765 5766 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5767 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5768 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5769 if (assoc_data->s1g) 5770 elem_start = mgmt->u.s1g_assoc_resp.variable; 5771 else 5772 elem_start = mgmt->u.assoc_resp.variable; 5773 5774 /* 5775 * Note: this may not be perfect, AP might misbehave - if 5776 * anyone needs to rely on perfect complete notification 5777 * with the exact right subtype, then we need to track what 5778 * we actually transmitted. 5779 */ 5780 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5781 IEEE80211_STYPE_ASSOC_REQ; 5782 5783 if (assoc_data->fils_kek_len && 5784 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5785 return; 5786 5787 elem_len = len - (elem_start - (u8 *)mgmt); 5788 parse_params.start = elem_start; 5789 parse_params.len = elem_len; 5790 elems = ieee802_11_parse_elems_full(&parse_params); 5791 if (!elems) 5792 goto notify_driver; 5793 5794 if (elems->aid_resp) 5795 aid = le16_to_cpu(elems->aid_resp->aid); 5796 else if (assoc_data->s1g) 5797 aid = 0; /* TODO */ 5798 else 5799 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5800 5801 /* 5802 * The 5 MSB of the AID field are reserved 5803 * (802.11-2016 9.4.1.8 AID field) 5804 */ 5805 aid &= 0x7ff; 5806 5807 sdata_info(sdata, 5808 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5809 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5810 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5811 5812 ifmgd->broken_ap = false; 5813 5814 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5815 elems->timeout_int && 5816 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5817 u32 tu, ms; 5818 5819 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5820 le32_to_cpu(elems->timeout_int->value)); 5821 5822 tu = le32_to_cpu(elems->timeout_int->value); 5823 ms = tu * 1024 / 1000; 5824 sdata_info(sdata, 5825 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5826 assoc_data->ap_addr, tu, ms); 5827 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5828 assoc_data->timeout_started = true; 5829 assoc_data->comeback = true; 5830 if (ms > IEEE80211_ASSOC_TIMEOUT) 5831 run_again(sdata, assoc_data->timeout); 5832 goto notify_driver; 5833 } 5834 5835 if (status_code != WLAN_STATUS_SUCCESS) { 5836 sdata_info(sdata, "%pM denied association (code=%d)\n", 5837 assoc_data->ap_addr, status_code); 5838 event.u.mlme.status = MLME_DENIED; 5839 event.u.mlme.reason = status_code; 5840 drv_event_callback(sdata->local, sdata, &event); 5841 } else { 5842 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5843 sdata_info(sdata, 5844 "invalid AID value %d (out of range), turn off PS\n", 5845 aid); 5846 aid = 0; 5847 ifmgd->broken_ap = true; 5848 } 5849 5850 if (ieee80211_vif_is_mld(&sdata->vif)) { 5851 struct ieee80211_mle_basic_common_info *common; 5852 5853 if (!elems->ml_basic) { 5854 sdata_info(sdata, 5855 "MLO association with %pM but no (basic) multi-link element in response!\n", 5856 assoc_data->ap_addr); 5857 goto abandon_assoc; 5858 } 5859 5860 common = (void *)elems->ml_basic->variable; 5861 5862 if (memcmp(assoc_data->ap_addr, 5863 common->mld_mac_addr, ETH_ALEN)) { 5864 sdata_info(sdata, 5865 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5866 common->mld_mac_addr, 5867 assoc_data->ap_addr); 5868 goto abandon_assoc; 5869 } 5870 5871 sdata->vif.cfg.eml_cap = 5872 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5873 sdata->vif.cfg.eml_med_sync_delay = 5874 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5875 sdata->vif.cfg.mld_capa_op = 5876 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5877 } 5878 5879 sdata->vif.cfg.aid = aid; 5880 5881 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5882 elem_start, elem_len)) { 5883 /* oops -- internal error -- send timeout for now */ 5884 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5885 goto notify_driver; 5886 } 5887 event.u.mlme.status = MLME_SUCCESS; 5888 drv_event_callback(sdata->local, sdata, &event); 5889 sdata_info(sdata, "associated\n"); 5890 5891 info.success = 1; 5892 } 5893 5894 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5895 struct ieee80211_link_data *link; 5896 5897 if (!assoc_data->link[link_id].bss) 5898 continue; 5899 5900 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5901 ether_addr_copy(resp.links[link_id].addr, 5902 assoc_data->link[link_id].addr); 5903 resp.links[link_id].status = assoc_data->link[link_id].status; 5904 5905 link = sdata_dereference(sdata->link[link_id], sdata); 5906 if (!link) 5907 continue; 5908 5909 /* get uapsd queues configuration - same for all links */ 5910 resp.uapsd_queues = 0; 5911 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5912 if (link->tx_conf[ac].uapsd) 5913 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5914 } 5915 5916 if (ieee80211_vif_is_mld(&sdata->vif)) { 5917 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5918 resp.ap_mld_addr = ap_mld_addr; 5919 } 5920 5921 ieee80211_destroy_assoc_data(sdata, 5922 status_code == WLAN_STATUS_SUCCESS ? 5923 ASSOC_SUCCESS : 5924 ASSOC_REJECTED); 5925 5926 resp.buf = (u8 *)mgmt; 5927 resp.len = len; 5928 resp.req_ies = ifmgd->assoc_req_ies; 5929 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5930 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5931 notify_driver: 5932 drv_mgd_complete_tx(sdata->local, sdata, &info); 5933 kfree(elems); 5934 return; 5935 abandon_assoc: 5936 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5937 goto notify_driver; 5938 } 5939 5940 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5941 struct ieee80211_mgmt *mgmt, size_t len, 5942 struct ieee80211_rx_status *rx_status) 5943 { 5944 struct ieee80211_sub_if_data *sdata = link->sdata; 5945 struct ieee80211_local *local = sdata->local; 5946 struct ieee80211_bss *bss; 5947 struct ieee80211_channel *channel; 5948 5949 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5950 5951 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5952 ieee80211_rx_status_to_khz(rx_status)); 5953 if (!channel) 5954 return; 5955 5956 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5957 if (bss) { 5958 link->conf->beacon_rate = bss->beacon_rate; 5959 ieee80211_rx_bss_put(local, bss); 5960 } 5961 } 5962 5963 5964 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5965 struct sk_buff *skb) 5966 { 5967 struct ieee80211_sub_if_data *sdata = link->sdata; 5968 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5969 struct ieee80211_if_managed *ifmgd; 5970 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5971 struct ieee80211_channel *channel; 5972 size_t baselen, len = skb->len; 5973 5974 ifmgd = &sdata->u.mgd; 5975 5976 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5977 5978 /* 5979 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5980 * "If a 6 GHz AP receives a Probe Request frame and responds with 5981 * a Probe Response frame [..], the Address 1 field of the Probe 5982 * Response frame shall be set to the broadcast address [..]" 5983 * So, on 6GHz band we should also accept broadcast responses. 5984 */ 5985 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5986 rx_status->freq); 5987 if (!channel) 5988 return; 5989 5990 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5991 (channel->band != NL80211_BAND_6GHZ || 5992 !is_broadcast_ether_addr(mgmt->da))) 5993 return; /* ignore ProbeResp to foreign address */ 5994 5995 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5996 if (baselen > len) 5997 return; 5998 5999 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6000 6001 if (ifmgd->associated && 6002 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6003 ieee80211_reset_ap_probe(sdata); 6004 } 6005 6006 /* 6007 * This is the canonical list of information elements we care about, 6008 * the filter code also gives us all changes to the Microsoft OUI 6009 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6010 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6011 * changes to requested client power. 6012 * 6013 * We implement beacon filtering in software since that means we can 6014 * avoid processing the frame here and in cfg80211, and userspace 6015 * will not be able to tell whether the hardware supports it or not. 6016 * 6017 * XXX: This list needs to be dynamic -- userspace needs to be able to 6018 * add items it requires. It also needs to be able to tell us to 6019 * look out for other vendor IEs. 6020 */ 6021 static const u64 care_about_ies = 6022 (1ULL << WLAN_EID_COUNTRY) | 6023 (1ULL << WLAN_EID_ERP_INFO) | 6024 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6025 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6026 (1ULL << WLAN_EID_HT_CAPABILITY) | 6027 (1ULL << WLAN_EID_HT_OPERATION) | 6028 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6029 6030 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6031 struct ieee80211_if_managed *ifmgd, 6032 struct ieee80211_bss_conf *bss_conf, 6033 struct ieee80211_local *local, 6034 struct ieee80211_rx_status *rx_status) 6035 { 6036 struct ieee80211_sub_if_data *sdata = link->sdata; 6037 6038 /* Track average RSSI from the Beacon frames of the current AP */ 6039 6040 if (!link->u.mgd.tracking_signal_avg) { 6041 link->u.mgd.tracking_signal_avg = true; 6042 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6043 link->u.mgd.last_cqm_event_signal = 0; 6044 link->u.mgd.count_beacon_signal = 1; 6045 link->u.mgd.last_ave_beacon_signal = 0; 6046 } else { 6047 link->u.mgd.count_beacon_signal++; 6048 } 6049 6050 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6051 -rx_status->signal); 6052 6053 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6054 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6055 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6056 int last_sig = link->u.mgd.last_ave_beacon_signal; 6057 struct ieee80211_event event = { 6058 .type = RSSI_EVENT, 6059 }; 6060 6061 /* 6062 * if signal crosses either of the boundaries, invoke callback 6063 * with appropriate parameters 6064 */ 6065 if (sig > ifmgd->rssi_max_thold && 6066 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6067 link->u.mgd.last_ave_beacon_signal = sig; 6068 event.u.rssi.data = RSSI_EVENT_HIGH; 6069 drv_event_callback(local, sdata, &event); 6070 } else if (sig < ifmgd->rssi_min_thold && 6071 (last_sig >= ifmgd->rssi_max_thold || 6072 last_sig == 0)) { 6073 link->u.mgd.last_ave_beacon_signal = sig; 6074 event.u.rssi.data = RSSI_EVENT_LOW; 6075 drv_event_callback(local, sdata, &event); 6076 } 6077 } 6078 6079 if (bss_conf->cqm_rssi_thold && 6080 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6081 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6082 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6083 int last_event = link->u.mgd.last_cqm_event_signal; 6084 int thold = bss_conf->cqm_rssi_thold; 6085 int hyst = bss_conf->cqm_rssi_hyst; 6086 6087 if (sig < thold && 6088 (last_event == 0 || sig < last_event - hyst)) { 6089 link->u.mgd.last_cqm_event_signal = sig; 6090 ieee80211_cqm_rssi_notify( 6091 &sdata->vif, 6092 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6093 sig, GFP_KERNEL); 6094 } else if (sig > thold && 6095 (last_event == 0 || sig > last_event + hyst)) { 6096 link->u.mgd.last_cqm_event_signal = sig; 6097 ieee80211_cqm_rssi_notify( 6098 &sdata->vif, 6099 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6100 sig, GFP_KERNEL); 6101 } 6102 } 6103 6104 if (bss_conf->cqm_rssi_low && 6105 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6106 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6107 int last_event = link->u.mgd.last_cqm_event_signal; 6108 int low = bss_conf->cqm_rssi_low; 6109 int high = bss_conf->cqm_rssi_high; 6110 6111 if (sig < low && 6112 (last_event == 0 || last_event >= low)) { 6113 link->u.mgd.last_cqm_event_signal = sig; 6114 ieee80211_cqm_rssi_notify( 6115 &sdata->vif, 6116 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6117 sig, GFP_KERNEL); 6118 } else if (sig > high && 6119 (last_event == 0 || last_event <= high)) { 6120 link->u.mgd.last_cqm_event_signal = sig; 6121 ieee80211_cqm_rssi_notify( 6122 &sdata->vif, 6123 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6124 sig, GFP_KERNEL); 6125 } 6126 } 6127 } 6128 6129 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6130 struct cfg80211_bss *bss) 6131 { 6132 if (ether_addr_equal(tx_bssid, bss->bssid)) 6133 return true; 6134 if (!bss->transmitted_bss) 6135 return false; 6136 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6137 } 6138 6139 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6140 struct wiphy_work *work) 6141 { 6142 struct ieee80211_sub_if_data *sdata = 6143 container_of(work, struct ieee80211_sub_if_data, 6144 u.mgd.ml_reconf_work.work); 6145 u16 new_valid_links, new_active_links, new_dormant_links; 6146 int ret; 6147 6148 if (!sdata->u.mgd.removed_links) 6149 return; 6150 6151 sdata_info(sdata, 6152 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6153 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6154 6155 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6156 if (new_valid_links == sdata->vif.valid_links) 6157 return; 6158 6159 if (!new_valid_links || 6160 !(new_valid_links & ~sdata->vif.dormant_links)) { 6161 sdata_info(sdata, "No valid links after reconfiguration\n"); 6162 ret = -EINVAL; 6163 goto out; 6164 } 6165 6166 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6167 if (new_active_links != sdata->vif.active_links) { 6168 if (!new_active_links) 6169 new_active_links = 6170 BIT(ffs(new_valid_links & 6171 ~sdata->vif.dormant_links) - 1); 6172 6173 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6174 if (ret) { 6175 sdata_info(sdata, 6176 "Failed setting active links\n"); 6177 goto out; 6178 } 6179 } 6180 6181 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6182 6183 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6184 new_dormant_links); 6185 if (ret) 6186 sdata_info(sdata, "Failed setting valid links\n"); 6187 6188 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6189 6190 out: 6191 if (!ret) 6192 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6193 else 6194 __ieee80211_disconnect(sdata); 6195 6196 sdata->u.mgd.removed_links = 0; 6197 } 6198 6199 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6200 struct ieee802_11_elems *elems) 6201 { 6202 const struct element *sub; 6203 unsigned long removed_links = 0; 6204 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6205 u8 link_id; 6206 u32 delay; 6207 6208 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6209 return; 6210 6211 /* Directly parse the sub elements as the common information doesn't 6212 * hold any useful information. 6213 */ 6214 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6215 elems->ml_reconf_len) { 6216 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6217 u8 *pos = prof->variable; 6218 u16 control; 6219 6220 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6221 continue; 6222 6223 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6224 sub->datalen)) 6225 return; 6226 6227 control = le16_to_cpu(prof->control); 6228 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6229 6230 removed_links |= BIT(link_id); 6231 6232 /* the MAC address should not be included, but handle it */ 6233 if (control & 6234 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6235 pos += 6; 6236 6237 /* According to Draft P802.11be_D3.0, the control should 6238 * include the AP Removal Timer present. If the AP Removal Timer 6239 * is not present assume immediate removal. 6240 */ 6241 if (control & 6242 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6243 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6244 } 6245 6246 removed_links &= sdata->vif.valid_links; 6247 if (!removed_links) { 6248 /* In case the removal was cancelled, abort it */ 6249 if (sdata->u.mgd.removed_links) { 6250 sdata->u.mgd.removed_links = 0; 6251 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6252 &sdata->u.mgd.ml_reconf_work); 6253 } 6254 return; 6255 } 6256 6257 delay = 0; 6258 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6259 struct ieee80211_bss_conf *link_conf = 6260 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6261 u32 link_delay; 6262 6263 if (!link_conf) { 6264 removed_links &= ~BIT(link_id); 6265 continue; 6266 } 6267 6268 if (link_removal_timeout[link_id] < 1) 6269 link_delay = 0; 6270 else 6271 link_delay = link_conf->beacon_int * 6272 (link_removal_timeout[link_id] - 1); 6273 6274 if (!delay) 6275 delay = link_delay; 6276 else 6277 delay = min(delay, link_delay); 6278 } 6279 6280 sdata->u.mgd.removed_links = removed_links; 6281 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6282 &sdata->u.mgd.ml_reconf_work, 6283 TU_TO_JIFFIES(delay)); 6284 } 6285 6286 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6287 u16 active_links, u16 dormant_links, 6288 u16 suspended_links) 6289 { 6290 u64 changed = 0; 6291 int ret; 6292 6293 if (!active_links) { 6294 ret = -EINVAL; 6295 goto out; 6296 } 6297 6298 /* If there is an active negotiated TTLM, it should be discarded by 6299 * the new negotiated/advertised TTLM. 6300 */ 6301 if (sdata->vif.neg_ttlm.valid) { 6302 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6303 sdata->vif.suspended_links = 0; 6304 changed = BSS_CHANGED_MLD_TTLM; 6305 } 6306 6307 if (sdata->vif.active_links != active_links) { 6308 /* usable links are affected when active_links are changed, 6309 * so notify the driver about the status change 6310 */ 6311 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6312 active_links &= sdata->vif.active_links; 6313 if (!active_links) 6314 active_links = 6315 BIT(__ffs(sdata->vif.valid_links & 6316 ~dormant_links)); 6317 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6318 if (ret) { 6319 sdata_info(sdata, "Failed to set TTLM active links\n"); 6320 goto out; 6321 } 6322 } 6323 6324 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6325 dormant_links); 6326 if (ret) { 6327 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6328 goto out; 6329 } 6330 6331 sdata->vif.suspended_links = suspended_links; 6332 if (sdata->vif.suspended_links) 6333 changed |= BSS_CHANGED_MLD_TTLM; 6334 6335 ieee80211_vif_cfg_change_notify(sdata, changed); 6336 6337 out: 6338 if (ret) 6339 ieee80211_disconnect(&sdata->vif, false); 6340 6341 return ret; 6342 } 6343 6344 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6345 struct wiphy_work *work) 6346 { 6347 u16 new_active_links, new_dormant_links; 6348 struct ieee80211_sub_if_data *sdata = 6349 container_of(work, struct ieee80211_sub_if_data, 6350 u.mgd.ttlm_work.work); 6351 6352 new_active_links = sdata->u.mgd.ttlm_info.map & 6353 sdata->vif.valid_links; 6354 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6355 sdata->vif.valid_links; 6356 6357 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6358 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6359 0)) 6360 return; 6361 6362 sdata->u.mgd.ttlm_info.active = true; 6363 sdata->u.mgd.ttlm_info.switch_time = 0; 6364 } 6365 6366 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6367 { 6368 if (bm_size == 1) 6369 return *data; 6370 else 6371 return get_unaligned_le16(data); 6372 } 6373 6374 static int 6375 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6376 const struct ieee80211_ttlm_elem *ttlm, 6377 struct ieee80211_adv_ttlm_info *ttlm_info) 6378 { 6379 /* The element size was already validated in 6380 * ieee80211_tid_to_link_map_size_ok() 6381 */ 6382 u8 control, link_map_presence, map_size, tid; 6383 u8 *pos; 6384 6385 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6386 pos = (void *)ttlm->optional; 6387 control = ttlm->control; 6388 6389 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6390 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6391 return 0; 6392 6393 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6394 IEEE80211_TTLM_DIRECTION_BOTH) { 6395 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6396 return -EINVAL; 6397 } 6398 6399 link_map_presence = *pos; 6400 pos++; 6401 6402 ttlm_info->switch_time = get_unaligned_le16(pos); 6403 6404 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6405 * by 1. 6406 */ 6407 if (!ttlm_info->switch_time) 6408 ttlm_info->switch_time = 1; 6409 6410 pos += 2; 6411 6412 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6413 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6414 pos += 3; 6415 } 6416 6417 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6418 map_size = 1; 6419 else 6420 map_size = 2; 6421 6422 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6423 * not advertise a TID-to-link mapping that does not map all TIDs to the 6424 * same link set, reject frame if not all links have mapping 6425 */ 6426 if (link_map_presence != 0xff) { 6427 sdata_info(sdata, 6428 "Invalid advertised T2L mapping presence indicator\n"); 6429 return -EINVAL; 6430 } 6431 6432 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6433 if (!ttlm_info->map) { 6434 sdata_info(sdata, 6435 "Invalid advertised T2L map for TID 0\n"); 6436 return -EINVAL; 6437 } 6438 6439 pos += map_size; 6440 6441 for (tid = 1; tid < 8; tid++) { 6442 u16 map = ieee80211_get_ttlm(map_size, pos); 6443 6444 if (map != ttlm_info->map) { 6445 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6446 tid); 6447 return -EINVAL; 6448 } 6449 6450 pos += map_size; 6451 } 6452 return 0; 6453 } 6454 6455 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6456 struct ieee802_11_elems *elems, 6457 u64 beacon_ts) 6458 { 6459 u8 i; 6460 int ret; 6461 6462 if (!ieee80211_vif_is_mld(&sdata->vif)) 6463 return; 6464 6465 if (!elems->ttlm_num) { 6466 if (sdata->u.mgd.ttlm_info.switch_time) { 6467 /* if a planned TID-to-link mapping was cancelled - 6468 * abort it 6469 */ 6470 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6471 &sdata->u.mgd.ttlm_work); 6472 } else if (sdata->u.mgd.ttlm_info.active) { 6473 /* if no TID-to-link element, set to default mapping in 6474 * which all TIDs are mapped to all setup links 6475 */ 6476 ret = ieee80211_vif_set_links(sdata, 6477 sdata->vif.valid_links, 6478 0); 6479 if (ret) { 6480 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6481 return; 6482 } 6483 ieee80211_vif_cfg_change_notify(sdata, 6484 BSS_CHANGED_MLD_VALID_LINKS); 6485 } 6486 memset(&sdata->u.mgd.ttlm_info, 0, 6487 sizeof(sdata->u.mgd.ttlm_info)); 6488 return; 6489 } 6490 6491 for (i = 0; i < elems->ttlm_num; i++) { 6492 struct ieee80211_adv_ttlm_info ttlm_info; 6493 u32 res; 6494 6495 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6496 &ttlm_info); 6497 6498 if (res) { 6499 __ieee80211_disconnect(sdata); 6500 return; 6501 } 6502 6503 if (ttlm_info.switch_time) { 6504 u16 beacon_ts_tu, st_tu, delay; 6505 u32 delay_jiffies; 6506 u64 mask; 6507 6508 /* The t2l map switch time is indicated with a partial 6509 * TSF value (bits 10 to 25), get the partial beacon TS 6510 * as well, and calc the delay to the start time. 6511 */ 6512 mask = GENMASK_ULL(25, 10); 6513 beacon_ts_tu = (beacon_ts & mask) >> 10; 6514 st_tu = ttlm_info.switch_time; 6515 delay = st_tu - beacon_ts_tu; 6516 6517 /* 6518 * If the switch time is far in the future, then it 6519 * could also be the previous switch still being 6520 * announced. 6521 * We can simply ignore it for now, if it is a future 6522 * switch the AP will continue to announce it anyway. 6523 */ 6524 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6525 return; 6526 6527 delay_jiffies = TU_TO_JIFFIES(delay); 6528 6529 /* Link switching can take time, so schedule it 6530 * 100ms before to be ready on time 6531 */ 6532 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6533 delay_jiffies -= 6534 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6535 else 6536 delay_jiffies = 0; 6537 6538 sdata->u.mgd.ttlm_info = ttlm_info; 6539 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6540 &sdata->u.mgd.ttlm_work); 6541 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6542 &sdata->u.mgd.ttlm_work, 6543 delay_jiffies); 6544 return; 6545 } 6546 } 6547 } 6548 6549 static void 6550 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 6551 int reporting_link_id, 6552 struct ieee802_11_elems *elems) 6553 { 6554 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6555 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6556 const struct element *sub; 6557 const u8 *subelems; 6558 size_t subelems_len; 6559 u8 common_size; 6560 int link_id; 6561 6562 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 6563 return; 6564 6565 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 6566 subelems = (u8 *)elems->ml_basic + common_size; 6567 subelems_len = elems->ml_basic_len - common_size; 6568 6569 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 6570 subelems, subelems_len) { 6571 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6572 struct ieee80211_link_data *link; 6573 ssize_t len; 6574 6575 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 6576 sub->datalen)) 6577 continue; 6578 6579 link_id = le16_get_bits(prof->control, 6580 IEEE80211_MLE_STA_CONTROL_LINK_ID); 6581 /* need a valid link ID, but also not our own, both AP bugs */ 6582 if (link_id == reporting_link_id || 6583 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6584 continue; 6585 6586 link = sdata_dereference(sdata->link[link_id], sdata); 6587 if (!link) 6588 continue; 6589 6590 len = cfg80211_defragment_element(sub, subelems, subelems_len, 6591 NULL, 0, 6592 IEEE80211_MLE_SUBELEM_FRAGMENT); 6593 if (WARN_ON(len < 0)) 6594 continue; 6595 6596 sta_profiles[link_id] = sub; 6597 sta_profiles_len[link_id] = len; 6598 } 6599 6600 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6601 struct ieee80211_mle_per_sta_profile *prof; 6602 struct ieee802_11_elems *prof_elems; 6603 struct ieee80211_link_data *link; 6604 ssize_t len; 6605 6606 if (link_id == reporting_link_id) 6607 continue; 6608 6609 link = sdata_dereference(sdata->link[link_id], sdata); 6610 if (!link) 6611 continue; 6612 6613 if (!sta_profiles[link_id]) { 6614 prof_elems = NULL; 6615 goto handle; 6616 } 6617 6618 /* we can defragment in-place, won't use the buffer again */ 6619 len = cfg80211_defragment_element(sta_profiles[link_id], 6620 subelems, subelems_len, 6621 (void *)sta_profiles[link_id], 6622 sta_profiles_len[link_id], 6623 IEEE80211_MLE_SUBELEM_FRAGMENT); 6624 if (WARN_ON(len != sta_profiles_len[link_id])) 6625 continue; 6626 6627 prof = (void *)sta_profiles[link_id]; 6628 prof_elems = ieee802_11_parse_elems(prof->variable + 6629 (prof->sta_info_len - 1), 6630 len - 6631 (prof->sta_info_len - 1), 6632 false, NULL); 6633 6634 /* memory allocation failed - let's hope that's transient */ 6635 if (!prof_elems) 6636 continue; 6637 6638 handle: 6639 /* 6640 * FIXME: the timings here are obviously incorrect, 6641 * but only older Intel drivers seem to care, and 6642 * those don't have MLO. If you really need this, 6643 * the problem is having to calculate it with the 6644 * TSF offset etc. The device_timestamp is still 6645 * correct, of course. 6646 */ 6647 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 6648 IEEE80211_CSA_SOURCE_OTHER_LINK); 6649 kfree(prof_elems); 6650 } 6651 } 6652 6653 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 6654 const struct ieee802_11_elems *elems) 6655 { 6656 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 6657 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 6658 6659 if (!elems->ssid) 6660 return false; 6661 6662 /* hidden SSID: zero length */ 6663 if (elems->ssid_len == 0) 6664 return false; 6665 6666 if (elems->ssid_len != cfg->ssid_len) 6667 return true; 6668 6669 /* hidden SSID: zeroed out */ 6670 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 6671 return false; 6672 6673 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 6674 } 6675 6676 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6677 struct ieee80211_hdr *hdr, size_t len, 6678 struct ieee80211_rx_status *rx_status) 6679 { 6680 struct ieee80211_sub_if_data *sdata = link->sdata; 6681 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6682 struct ieee80211_bss_conf *bss_conf = link->conf; 6683 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6684 struct ieee80211_mgmt *mgmt = (void *) hdr; 6685 size_t baselen; 6686 struct ieee802_11_elems *elems; 6687 struct ieee80211_local *local = sdata->local; 6688 struct ieee80211_chanctx_conf *chanctx_conf; 6689 struct ieee80211_supported_band *sband; 6690 struct ieee80211_channel *chan; 6691 struct link_sta_info *link_sta; 6692 struct sta_info *sta; 6693 u64 changed = 0; 6694 bool erp_valid; 6695 u8 erp_value = 0; 6696 u32 ncrc = 0; 6697 u8 *bssid, *variable = mgmt->u.beacon.variable; 6698 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6699 struct ieee80211_elems_parse_params parse_params = { 6700 .mode = link->u.mgd.conn.mode, 6701 .link_id = -1, 6702 .from_ap = true, 6703 }; 6704 6705 lockdep_assert_wiphy(local->hw.wiphy); 6706 6707 /* Process beacon from the current BSS */ 6708 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6709 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6710 struct ieee80211_ext *ext = (void *) mgmt; 6711 6712 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6713 variable = ext->u.s1g_short_beacon.variable; 6714 else 6715 variable = ext->u.s1g_beacon.variable; 6716 } 6717 6718 baselen = (u8 *) variable - (u8 *) mgmt; 6719 if (baselen > len) 6720 return; 6721 6722 parse_params.start = variable; 6723 parse_params.len = len - baselen; 6724 6725 rcu_read_lock(); 6726 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 6727 if (!chanctx_conf) { 6728 rcu_read_unlock(); 6729 return; 6730 } 6731 6732 if (ieee80211_rx_status_to_khz(rx_status) != 6733 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6734 rcu_read_unlock(); 6735 return; 6736 } 6737 chan = chanctx_conf->def.chan; 6738 rcu_read_unlock(); 6739 6740 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6741 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6742 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6743 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6744 elems = ieee802_11_parse_elems_full(&parse_params); 6745 if (!elems) 6746 return; 6747 6748 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6749 6750 if (elems->dtim_period) 6751 link->u.mgd.dtim_period = elems->dtim_period; 6752 link->u.mgd.have_beacon = true; 6753 ifmgd->assoc_data->need_beacon = false; 6754 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6755 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6756 bss_conf->sync_tsf = 6757 le64_to_cpu(mgmt->u.beacon.timestamp); 6758 bss_conf->sync_device_ts = 6759 rx_status->device_timestamp; 6760 bss_conf->sync_dtim_count = elems->dtim_count; 6761 } 6762 6763 if (elems->mbssid_config_ie) 6764 bss_conf->profile_periodicity = 6765 elems->mbssid_config_ie->profile_periodicity; 6766 else 6767 bss_conf->profile_periodicity = 0; 6768 6769 if (elems->ext_capab_len >= 11 && 6770 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6771 bss_conf->ema_ap = true; 6772 else 6773 bss_conf->ema_ap = false; 6774 6775 /* continue assoc process */ 6776 ifmgd->assoc_data->timeout = jiffies; 6777 ifmgd->assoc_data->timeout_started = true; 6778 run_again(sdata, ifmgd->assoc_data->timeout); 6779 kfree(elems); 6780 return; 6781 } 6782 6783 if (!ifmgd->associated || 6784 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 6785 return; 6786 bssid = link->u.mgd.bssid; 6787 6788 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6789 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6790 local, rx_status); 6791 6792 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6793 mlme_dbg_ratelimited(sdata, 6794 "cancelling AP probe due to a received beacon\n"); 6795 ieee80211_reset_ap_probe(sdata); 6796 } 6797 6798 /* 6799 * Push the beacon loss detection into the future since 6800 * we are processing a beacon from the AP just now. 6801 */ 6802 ieee80211_sta_reset_beacon_monitor(sdata); 6803 6804 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6805 * element (which carries the beacon interval). Don't forget to add a 6806 * bit to care_about_ies[] above if mac80211 is interested in a 6807 * changing S1G element. 6808 */ 6809 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6810 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6811 parse_params.bss = bss_conf->bss; 6812 parse_params.filter = care_about_ies; 6813 parse_params.crc = ncrc; 6814 elems = ieee802_11_parse_elems_full(&parse_params); 6815 if (!elems) 6816 return; 6817 6818 if (rx_status->flag & RX_FLAG_DECRYPTED && 6819 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 6820 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 6821 sdata->vif.cfg.ap_addr); 6822 __ieee80211_disconnect(sdata); 6823 return; 6824 } 6825 6826 ncrc = elems->crc; 6827 6828 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6829 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6830 if (local->hw.conf.dynamic_ps_timeout > 0) { 6831 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6832 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6833 ieee80211_hw_config(local, 6834 IEEE80211_CONF_CHANGE_PS); 6835 } 6836 ieee80211_send_nullfunc(local, sdata, false); 6837 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6838 local->pspolling = true; 6839 6840 /* 6841 * Here is assumed that the driver will be 6842 * able to send ps-poll frame and receive a 6843 * response even though power save mode is 6844 * enabled, but some drivers might require 6845 * to disable power save here. This needs 6846 * to be investigated. 6847 */ 6848 ieee80211_send_pspoll(local, sdata); 6849 } 6850 } 6851 6852 if (sdata->vif.p2p || 6853 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6854 struct ieee80211_p2p_noa_attr noa = {}; 6855 int ret; 6856 6857 ret = cfg80211_get_p2p_attr(variable, 6858 len - baselen, 6859 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6860 (u8 *) &noa, sizeof(noa)); 6861 if (ret >= 2) { 6862 if (link->u.mgd.p2p_noa_index != noa.index) { 6863 /* valid noa_attr and index changed */ 6864 link->u.mgd.p2p_noa_index = noa.index; 6865 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6866 changed |= BSS_CHANGED_P2P_PS; 6867 /* 6868 * make sure we update all information, the CRC 6869 * mechanism doesn't look at P2P attributes. 6870 */ 6871 link->u.mgd.beacon_crc_valid = false; 6872 } 6873 } else if (link->u.mgd.p2p_noa_index != -1) { 6874 /* noa_attr not found and we had valid noa_attr before */ 6875 link->u.mgd.p2p_noa_index = -1; 6876 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6877 changed |= BSS_CHANGED_P2P_PS; 6878 link->u.mgd.beacon_crc_valid = false; 6879 } 6880 } 6881 6882 /* 6883 * Update beacon timing and dtim count on every beacon appearance. This 6884 * will allow the driver to use the most updated values. Do it before 6885 * comparing this one with last received beacon. 6886 * IMPORTANT: These parameters would possibly be out of sync by the time 6887 * the driver will use them. The synchronized view is currently 6888 * guaranteed only in certain callbacks. 6889 */ 6890 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6891 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6892 bss_conf->sync_tsf = 6893 le64_to_cpu(mgmt->u.beacon.timestamp); 6894 bss_conf->sync_device_ts = 6895 rx_status->device_timestamp; 6896 bss_conf->sync_dtim_count = elems->dtim_count; 6897 } 6898 6899 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6900 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6901 goto free; 6902 link->u.mgd.beacon_crc = ncrc; 6903 link->u.mgd.beacon_crc_valid = true; 6904 6905 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6906 6907 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6908 rx_status->device_timestamp, 6909 elems, elems, 6910 IEEE80211_CSA_SOURCE_BEACON); 6911 6912 /* note that after this elems->ml_basic can no longer be used fully */ 6913 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 6914 6915 if (!link->u.mgd.disable_wmm_tracking && 6916 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6917 elems->wmm_param_len, 6918 elems->mu_edca_param_set)) 6919 changed |= BSS_CHANGED_QOS; 6920 6921 /* 6922 * If we haven't had a beacon before, tell the driver about the 6923 * DTIM period (and beacon timing if desired) now. 6924 */ 6925 if (!link->u.mgd.have_beacon) { 6926 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6927 bss_conf->dtim_period = elems->dtim_period ?: 1; 6928 6929 changed |= BSS_CHANGED_BEACON_INFO; 6930 link->u.mgd.have_beacon = true; 6931 6932 ieee80211_recalc_ps(local); 6933 6934 ieee80211_recalc_ps_vif(sdata); 6935 } 6936 6937 if (elems->erp_info) { 6938 erp_valid = true; 6939 erp_value = elems->erp_info[0]; 6940 } else { 6941 erp_valid = false; 6942 } 6943 6944 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6945 changed |= ieee80211_handle_bss_capability(link, 6946 le16_to_cpu(mgmt->u.beacon.capab_info), 6947 erp_valid, erp_value); 6948 6949 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6950 if (WARN_ON(!sta)) { 6951 goto free; 6952 } 6953 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6954 lockdep_is_held(&local->hw.wiphy->mtx)); 6955 if (WARN_ON(!link_sta)) { 6956 goto free; 6957 } 6958 6959 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 6960 goto free; 6961 6962 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 6963 6964 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6965 6966 if (ieee80211_config_bw(link, elems, true, &changed)) { 6967 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6968 WLAN_REASON_DEAUTH_LEAVING, 6969 true, deauth_buf); 6970 ieee80211_report_disconnect(sdata, deauth_buf, 6971 sizeof(deauth_buf), true, 6972 WLAN_REASON_DEAUTH_LEAVING, 6973 false); 6974 goto free; 6975 } 6976 6977 if (elems->opmode_notif) 6978 ieee80211_vht_handle_opmode(sdata, link_sta, 6979 *elems->opmode_notif, 6980 rx_status->band); 6981 6982 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6983 elems->country_elem, 6984 elems->country_elem_len, 6985 elems->pwr_constr_elem, 6986 elems->cisco_dtpc_elem); 6987 6988 ieee80211_ml_reconfiguration(sdata, elems); 6989 ieee80211_process_adv_ttlm(sdata, elems, 6990 le64_to_cpu(mgmt->u.beacon.timestamp)); 6991 6992 ieee80211_link_info_change_notify(sdata, link, changed); 6993 free: 6994 kfree(elems); 6995 } 6996 6997 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6998 struct ieee80211_neg_ttlm neg_ttlm) 6999 { 7000 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7001 u8 i; 7002 7003 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7004 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7005 7006 /* If there is an active TTLM, unset previously suspended links */ 7007 if (sdata->vif.neg_ttlm.valid) 7008 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7009 7010 /* exclude links that are already disabled by advertised TTLM */ 7011 new_active_links = 7012 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7013 new_suspended_links = 7014 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7015 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7016 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7017 new_dormant_links, new_suspended_links)) 7018 return; 7019 7020 sdata->vif.neg_ttlm = neg_ttlm; 7021 sdata->vif.neg_ttlm.valid = true; 7022 } 7023 7024 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7025 struct wiphy_work *work) 7026 { 7027 struct ieee80211_sub_if_data *sdata = 7028 container_of(work, struct ieee80211_sub_if_data, 7029 u.mgd.neg_ttlm_timeout_work.work); 7030 7031 sdata_info(sdata, 7032 "No negotiated TTLM response from AP, disconnecting.\n"); 7033 7034 __ieee80211_disconnect(sdata); 7035 } 7036 7037 static void 7038 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7039 struct ieee80211_neg_ttlm *neg_ttlm) 7040 { 7041 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7042 7043 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7044 sizeof(neg_ttlm->downlink))) { 7045 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7046 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7047 } else { 7048 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7049 } 7050 7051 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7052 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7053 __le16 map; 7054 7055 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7056 7057 pos = skb_put(skb, len + 2); 7058 *pos++ = WLAN_EID_EXTENSION; 7059 len_pos = pos++; 7060 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7061 *pos++ = direction[i]; 7062 map_ind_pos = pos++; 7063 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7064 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7065 cpu_to_le16(neg_ttlm->uplink[tid]) : 7066 cpu_to_le16(neg_ttlm->downlink[tid]); 7067 if (!map) 7068 continue; 7069 7070 len += 2; 7071 map_ind |= BIT(tid); 7072 skb_put_data(skb, &map, sizeof(map)); 7073 } 7074 7075 *map_ind_pos = map_ind; 7076 *len_pos = len; 7077 7078 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7079 break; 7080 } 7081 } 7082 7083 static void 7084 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7085 struct ieee80211_neg_ttlm *neg_ttlm, 7086 u8 dialog_token) 7087 { 7088 struct ieee80211_local *local = sdata->local; 7089 struct ieee80211_mgmt *mgmt; 7090 struct sk_buff *skb; 7091 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7092 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7093 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7094 7095 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7096 if (!skb) 7097 return; 7098 7099 skb_reserve(skb, local->tx_headroom); 7100 mgmt = skb_put_zero(skb, hdr_len); 7101 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7102 IEEE80211_STYPE_ACTION); 7103 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7104 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7105 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7106 7107 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7108 mgmt->u.action.u.ttlm_req.action_code = 7109 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7110 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7111 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7112 ieee80211_tx_skb(sdata, skb); 7113 } 7114 7115 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7116 struct cfg80211_ttlm_params *params) 7117 { 7118 struct ieee80211_neg_ttlm neg_ttlm = {}; 7119 u8 i; 7120 7121 if (!ieee80211_vif_is_mld(&sdata->vif) || 7122 !(sdata->vif.cfg.mld_capa_op & 7123 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7124 return -EINVAL; 7125 7126 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7127 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7128 (params->ulink[i] & ~sdata->vif.valid_links)) 7129 return -EINVAL; 7130 7131 neg_ttlm.downlink[i] = params->dlink[i]; 7132 neg_ttlm.uplink[i] = params->ulink[i]; 7133 } 7134 7135 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7136 NEG_TTLM_RES_ACCEPT) 7137 return -EINVAL; 7138 7139 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7140 sdata->u.mgd.dialog_token_alloc++; 7141 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7142 sdata->u.mgd.dialog_token_alloc); 7143 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7144 &sdata->u.mgd.neg_ttlm_timeout_work); 7145 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7146 &sdata->u.mgd.neg_ttlm_timeout_work, 7147 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7148 return 0; 7149 } 7150 7151 static void 7152 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7153 enum ieee80211_neg_ttlm_res ttlm_res, 7154 u8 dialog_token, 7155 struct ieee80211_neg_ttlm *neg_ttlm) 7156 { 7157 struct ieee80211_local *local = sdata->local; 7158 struct ieee80211_mgmt *mgmt; 7159 struct sk_buff *skb; 7160 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7161 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7162 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7163 7164 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7165 if (!skb) 7166 return; 7167 7168 skb_reserve(skb, local->tx_headroom); 7169 mgmt = skb_put_zero(skb, hdr_len); 7170 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7171 IEEE80211_STYPE_ACTION); 7172 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7173 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7174 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7175 7176 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7177 mgmt->u.action.u.ttlm_res.action_code = 7178 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7179 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7180 switch (ttlm_res) { 7181 default: 7182 WARN_ON(1); 7183 fallthrough; 7184 case NEG_TTLM_RES_REJECT: 7185 mgmt->u.action.u.ttlm_res.status_code = 7186 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7187 break; 7188 case NEG_TTLM_RES_ACCEPT: 7189 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7190 break; 7191 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7192 mgmt->u.action.u.ttlm_res.status_code = 7193 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7194 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7195 break; 7196 } 7197 7198 ieee80211_tx_skb(sdata, skb); 7199 } 7200 7201 static int 7202 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7203 const struct ieee80211_ttlm_elem *ttlm, 7204 struct ieee80211_neg_ttlm *neg_ttlm, 7205 u8 *direction) 7206 { 7207 u8 control, link_map_presence, map_size, tid; 7208 u8 *pos; 7209 7210 /* The element size was already validated in 7211 * ieee80211_tid_to_link_map_size_ok() 7212 */ 7213 pos = (void *)ttlm->optional; 7214 7215 control = ttlm->control; 7216 7217 /* mapping switch time and expected duration fields are not expected 7218 * in case of negotiated TTLM 7219 */ 7220 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7221 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7222 mlme_dbg(sdata, 7223 "Invalid TTLM element in negotiated TTLM request\n"); 7224 return -EINVAL; 7225 } 7226 7227 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7228 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7229 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7230 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7231 } 7232 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7233 return 0; 7234 } 7235 7236 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7237 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7238 *direction != IEEE80211_TTLM_DIRECTION_UP && 7239 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7240 return -EINVAL; 7241 7242 link_map_presence = *pos; 7243 pos++; 7244 7245 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7246 map_size = 1; 7247 else 7248 map_size = 2; 7249 7250 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7251 u16 map; 7252 7253 if (link_map_presence & BIT(tid)) { 7254 map = ieee80211_get_ttlm(map_size, pos); 7255 if (!map) { 7256 mlme_dbg(sdata, 7257 "No active links for TID %d", tid); 7258 return -EINVAL; 7259 } 7260 } else { 7261 map = 0; 7262 } 7263 7264 switch (*direction) { 7265 case IEEE80211_TTLM_DIRECTION_BOTH: 7266 neg_ttlm->downlink[tid] = map; 7267 neg_ttlm->uplink[tid] = map; 7268 break; 7269 case IEEE80211_TTLM_DIRECTION_DOWN: 7270 neg_ttlm->downlink[tid] = map; 7271 break; 7272 case IEEE80211_TTLM_DIRECTION_UP: 7273 neg_ttlm->uplink[tid] = map; 7274 break; 7275 default: 7276 return -EINVAL; 7277 } 7278 pos += map_size; 7279 } 7280 return 0; 7281 } 7282 7283 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7284 struct ieee80211_mgmt *mgmt, size_t len) 7285 { 7286 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7287 size_t ies_len; 7288 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7289 struct ieee802_11_elems *elems = NULL; 7290 struct ieee80211_neg_ttlm neg_ttlm = {}; 7291 7292 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7293 7294 if (!ieee80211_vif_is_mld(&sdata->vif)) 7295 return; 7296 7297 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7298 ies_len = len - offsetof(struct ieee80211_mgmt, 7299 u.action.u.ttlm_req.variable); 7300 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7301 ies_len, true, NULL); 7302 if (!elems) { 7303 ttlm_res = NEG_TTLM_RES_REJECT; 7304 goto out; 7305 } 7306 7307 for (i = 0; i < elems->ttlm_num; i++) { 7308 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7309 &neg_ttlm, &direction[i]) || 7310 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7311 elems->ttlm_num != 1)) { 7312 ttlm_res = NEG_TTLM_RES_REJECT; 7313 goto out; 7314 } 7315 } 7316 7317 if (!elems->ttlm_num || 7318 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7319 ttlm_res = NEG_TTLM_RES_REJECT; 7320 goto out; 7321 } 7322 7323 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7324 if ((neg_ttlm.downlink[i] && 7325 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7326 (neg_ttlm.uplink[i] && 7327 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7328 ttlm_res = NEG_TTLM_RES_REJECT; 7329 goto out; 7330 } 7331 } 7332 7333 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7334 7335 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7336 goto out; 7337 7338 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7339 out: 7340 kfree(elems); 7341 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7342 } 7343 7344 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7345 struct ieee80211_mgmt *mgmt, size_t len) 7346 { 7347 if (!ieee80211_vif_is_mld(&sdata->vif) || 7348 mgmt->u.action.u.ttlm_req.dialog_token != 7349 sdata->u.mgd.dialog_token_alloc) 7350 return; 7351 7352 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7353 &sdata->u.mgd.neg_ttlm_timeout_work); 7354 7355 /* MLD station sends a TID to link mapping request, mainly to handle 7356 * BTM (BSS transition management) request, in which case it needs to 7357 * restrict the active links set. 7358 * In this case it's not expected that the MLD AP will reject the 7359 * negotiated TTLM request. 7360 * This can be better implemented in the future, to handle request 7361 * rejections. 7362 */ 7363 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7364 __ieee80211_disconnect(sdata); 7365 } 7366 7367 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7368 struct wiphy_work *work) 7369 { 7370 u16 new_dormant_links; 7371 struct ieee80211_sub_if_data *sdata = 7372 container_of(work, struct ieee80211_sub_if_data, 7373 u.mgd.teardown_ttlm_work); 7374 7375 if (!sdata->vif.neg_ttlm.valid) 7376 return; 7377 7378 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7379 new_dormant_links = 7380 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7381 sdata->vif.suspended_links = 0; 7382 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7383 new_dormant_links); 7384 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7385 BSS_CHANGED_MLD_VALID_LINKS); 7386 } 7387 7388 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7389 { 7390 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7391 struct ieee80211_local *local = sdata->local; 7392 struct ieee80211_mgmt *mgmt; 7393 struct sk_buff *skb; 7394 int frame_len = offsetofend(struct ieee80211_mgmt, 7395 u.action.u.ttlm_tear_down); 7396 struct ieee80211_tx_info *info; 7397 7398 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7399 if (!skb) 7400 return; 7401 7402 skb_reserve(skb, local->hw.extra_tx_headroom); 7403 mgmt = skb_put_zero(skb, frame_len); 7404 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7405 IEEE80211_STYPE_ACTION); 7406 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7407 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7408 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7409 7410 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7411 mgmt->u.action.u.ttlm_tear_down.action_code = 7412 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7413 7414 info = IEEE80211_SKB_CB(skb); 7415 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7416 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7417 ieee80211_tx_skb(sdata, skb); 7418 } 7419 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7420 7421 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7422 struct sk_buff *skb) 7423 { 7424 struct ieee80211_link_data *link = &sdata->deflink; 7425 struct ieee80211_rx_status *rx_status; 7426 struct ieee80211_hdr *hdr; 7427 u16 fc; 7428 7429 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7430 7431 rx_status = (struct ieee80211_rx_status *) skb->cb; 7432 hdr = (struct ieee80211_hdr *) skb->data; 7433 fc = le16_to_cpu(hdr->frame_control); 7434 7435 switch (fc & IEEE80211_FCTL_STYPE) { 7436 case IEEE80211_STYPE_S1G_BEACON: 7437 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7438 break; 7439 } 7440 } 7441 7442 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7443 struct sk_buff *skb) 7444 { 7445 struct ieee80211_link_data *link = &sdata->deflink; 7446 struct ieee80211_rx_status *rx_status; 7447 struct ieee802_11_elems *elems; 7448 struct ieee80211_mgmt *mgmt; 7449 u16 fc; 7450 int ies_len; 7451 7452 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7453 7454 rx_status = (struct ieee80211_rx_status *) skb->cb; 7455 mgmt = (struct ieee80211_mgmt *) skb->data; 7456 fc = le16_to_cpu(mgmt->frame_control); 7457 7458 if (rx_status->link_valid) { 7459 link = sdata_dereference(sdata->link[rx_status->link_id], 7460 sdata); 7461 if (!link) 7462 return; 7463 } 7464 7465 switch (fc & IEEE80211_FCTL_STYPE) { 7466 case IEEE80211_STYPE_BEACON: 7467 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7468 skb->len, rx_status); 7469 break; 7470 case IEEE80211_STYPE_PROBE_RESP: 7471 ieee80211_rx_mgmt_probe_resp(link, skb); 7472 break; 7473 case IEEE80211_STYPE_AUTH: 7474 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7475 break; 7476 case IEEE80211_STYPE_DEAUTH: 7477 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7478 break; 7479 case IEEE80211_STYPE_DISASSOC: 7480 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7481 break; 7482 case IEEE80211_STYPE_ASSOC_RESP: 7483 case IEEE80211_STYPE_REASSOC_RESP: 7484 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7485 break; 7486 case IEEE80211_STYPE_ACTION: 7487 if (!sdata->u.mgd.associated || 7488 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7489 break; 7490 7491 switch (mgmt->u.action.category) { 7492 case WLAN_CATEGORY_SPECTRUM_MGMT: 7493 ies_len = skb->len - 7494 offsetof(struct ieee80211_mgmt, 7495 u.action.u.chan_switch.variable); 7496 7497 if (ies_len < 0) 7498 break; 7499 7500 /* CSA IE cannot be overridden, no need for BSSID */ 7501 elems = ieee802_11_parse_elems( 7502 mgmt->u.action.u.chan_switch.variable, 7503 ies_len, true, NULL); 7504 7505 if (elems && !elems->parse_error) { 7506 enum ieee80211_csa_source src = 7507 IEEE80211_CSA_SOURCE_PROT_ACTION; 7508 7509 ieee80211_sta_process_chanswitch(link, 7510 rx_status->mactime, 7511 rx_status->device_timestamp, 7512 elems, elems, 7513 src); 7514 } 7515 kfree(elems); 7516 break; 7517 case WLAN_CATEGORY_PUBLIC: 7518 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 7519 ies_len = skb->len - 7520 offsetof(struct ieee80211_mgmt, 7521 u.action.u.ext_chan_switch.variable); 7522 7523 if (ies_len < 0) 7524 break; 7525 7526 /* 7527 * extended CSA IE can't be overridden, no need for 7528 * BSSID 7529 */ 7530 elems = ieee802_11_parse_elems( 7531 mgmt->u.action.u.ext_chan_switch.variable, 7532 ies_len, true, NULL); 7533 7534 if (elems && !elems->parse_error) { 7535 enum ieee80211_csa_source src; 7536 7537 if (mgmt->u.action.category == 7538 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 7539 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 7540 else 7541 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 7542 7543 /* for the handling code pretend it was an IE */ 7544 elems->ext_chansw_ie = 7545 &mgmt->u.action.u.ext_chan_switch.data; 7546 7547 ieee80211_sta_process_chanswitch(link, 7548 rx_status->mactime, 7549 rx_status->device_timestamp, 7550 elems, elems, 7551 src); 7552 } 7553 7554 kfree(elems); 7555 break; 7556 } 7557 break; 7558 } 7559 } 7560 7561 static void ieee80211_sta_timer(struct timer_list *t) 7562 { 7563 struct ieee80211_sub_if_data *sdata = 7564 from_timer(sdata, t, u.mgd.timer); 7565 7566 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7567 } 7568 7569 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7570 u8 reason, bool tx) 7571 { 7572 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7573 7574 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7575 tx, frame_buf); 7576 7577 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7578 reason, false); 7579 } 7580 7581 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7582 { 7583 struct ieee80211_local *local = sdata->local; 7584 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7585 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7586 u32 tx_flags = 0; 7587 u16 trans = 1; 7588 u16 status = 0; 7589 struct ieee80211_prep_tx_info info = { 7590 .subtype = IEEE80211_STYPE_AUTH, 7591 }; 7592 7593 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7594 7595 if (WARN_ON_ONCE(!auth_data)) 7596 return -EINVAL; 7597 7598 auth_data->tries++; 7599 7600 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7601 sdata_info(sdata, "authentication with %pM timed out\n", 7602 auth_data->ap_addr); 7603 7604 /* 7605 * Most likely AP is not in the range so remove the 7606 * bss struct for that AP. 7607 */ 7608 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7609 7610 return -ETIMEDOUT; 7611 } 7612 7613 if (auth_data->algorithm == WLAN_AUTH_SAE) 7614 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7615 7616 info.link_id = auth_data->link_id; 7617 drv_mgd_prepare_tx(local, sdata, &info); 7618 7619 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7620 auth_data->ap_addr, auth_data->tries, 7621 IEEE80211_AUTH_MAX_TRIES); 7622 7623 auth_data->expected_transaction = 2; 7624 7625 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7626 trans = auth_data->sae_trans; 7627 status = auth_data->sae_status; 7628 auth_data->expected_transaction = trans; 7629 } 7630 7631 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7632 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7633 IEEE80211_TX_INTFL_MLME_CONN_TX; 7634 7635 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7636 auth_data->data, auth_data->data_len, 7637 auth_data->ap_addr, auth_data->ap_addr, 7638 NULL, 0, 0, tx_flags); 7639 7640 if (tx_flags == 0) { 7641 if (auth_data->algorithm == WLAN_AUTH_SAE) 7642 auth_data->timeout = jiffies + 7643 IEEE80211_AUTH_TIMEOUT_SAE; 7644 else 7645 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7646 } else { 7647 auth_data->timeout = 7648 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7649 } 7650 7651 auth_data->timeout_started = true; 7652 run_again(sdata, auth_data->timeout); 7653 7654 return 0; 7655 } 7656 7657 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7658 { 7659 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7660 struct ieee80211_local *local = sdata->local; 7661 int ret; 7662 7663 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7664 7665 assoc_data->tries++; 7666 assoc_data->comeback = false; 7667 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7668 sdata_info(sdata, "association with %pM timed out\n", 7669 assoc_data->ap_addr); 7670 7671 /* 7672 * Most likely AP is not in the range so remove the 7673 * bss struct for that AP. 7674 */ 7675 cfg80211_unlink_bss(local->hw.wiphy, 7676 assoc_data->link[assoc_data->assoc_link_id].bss); 7677 7678 return -ETIMEDOUT; 7679 } 7680 7681 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7682 assoc_data->ap_addr, assoc_data->tries, 7683 IEEE80211_ASSOC_MAX_TRIES); 7684 ret = ieee80211_send_assoc(sdata); 7685 if (ret) 7686 return ret; 7687 7688 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7689 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7690 assoc_data->timeout_started = true; 7691 run_again(sdata, assoc_data->timeout); 7692 } else { 7693 assoc_data->timeout = 7694 round_jiffies_up(jiffies + 7695 IEEE80211_ASSOC_TIMEOUT_LONG); 7696 assoc_data->timeout_started = true; 7697 run_again(sdata, assoc_data->timeout); 7698 } 7699 7700 return 0; 7701 } 7702 7703 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7704 __le16 fc, bool acked) 7705 { 7706 struct ieee80211_local *local = sdata->local; 7707 7708 sdata->u.mgd.status_fc = fc; 7709 sdata->u.mgd.status_acked = acked; 7710 sdata->u.mgd.status_received = true; 7711 7712 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7713 } 7714 7715 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7716 { 7717 struct ieee80211_local *local = sdata->local; 7718 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7719 7720 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7721 7722 if (ifmgd->status_received) { 7723 __le16 fc = ifmgd->status_fc; 7724 bool status_acked = ifmgd->status_acked; 7725 7726 ifmgd->status_received = false; 7727 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7728 if (status_acked) { 7729 if (ifmgd->auth_data->algorithm == 7730 WLAN_AUTH_SAE) 7731 ifmgd->auth_data->timeout = 7732 jiffies + 7733 IEEE80211_AUTH_TIMEOUT_SAE; 7734 else 7735 ifmgd->auth_data->timeout = 7736 jiffies + 7737 IEEE80211_AUTH_TIMEOUT_SHORT; 7738 run_again(sdata, ifmgd->auth_data->timeout); 7739 } else { 7740 ifmgd->auth_data->timeout = jiffies - 1; 7741 } 7742 ifmgd->auth_data->timeout_started = true; 7743 } else if (ifmgd->assoc_data && 7744 !ifmgd->assoc_data->comeback && 7745 (ieee80211_is_assoc_req(fc) || 7746 ieee80211_is_reassoc_req(fc))) { 7747 /* 7748 * Update association timeout based on the TX status 7749 * for the (Re)Association Request frame. Skip this if 7750 * we have already processed a (Re)Association Response 7751 * frame that indicated need for association comeback 7752 * at a specific time in the future. This could happen 7753 * if the TX status information is delayed enough for 7754 * the response to be received and processed first. 7755 */ 7756 if (status_acked) { 7757 ifmgd->assoc_data->timeout = 7758 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7759 run_again(sdata, ifmgd->assoc_data->timeout); 7760 } else { 7761 ifmgd->assoc_data->timeout = jiffies - 1; 7762 } 7763 ifmgd->assoc_data->timeout_started = true; 7764 } 7765 } 7766 7767 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7768 time_after(jiffies, ifmgd->auth_data->timeout)) { 7769 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7770 /* 7771 * ok ... we waited for assoc or continuation but 7772 * userspace didn't do it, so kill the auth data 7773 */ 7774 ieee80211_destroy_auth_data(sdata, false); 7775 } else if (ieee80211_auth(sdata)) { 7776 u8 ap_addr[ETH_ALEN]; 7777 struct ieee80211_event event = { 7778 .type = MLME_EVENT, 7779 .u.mlme.data = AUTH_EVENT, 7780 .u.mlme.status = MLME_TIMEOUT, 7781 }; 7782 7783 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7784 7785 ieee80211_destroy_auth_data(sdata, false); 7786 7787 cfg80211_auth_timeout(sdata->dev, ap_addr); 7788 drv_event_callback(sdata->local, sdata, &event); 7789 } 7790 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7791 run_again(sdata, ifmgd->auth_data->timeout); 7792 7793 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7794 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7795 if ((ifmgd->assoc_data->need_beacon && 7796 !sdata->deflink.u.mgd.have_beacon) || 7797 ieee80211_do_assoc(sdata)) { 7798 struct ieee80211_event event = { 7799 .type = MLME_EVENT, 7800 .u.mlme.data = ASSOC_EVENT, 7801 .u.mlme.status = MLME_TIMEOUT, 7802 }; 7803 7804 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7805 drv_event_callback(sdata->local, sdata, &event); 7806 } 7807 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7808 run_again(sdata, ifmgd->assoc_data->timeout); 7809 7810 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7811 ifmgd->associated) { 7812 u8 *bssid = sdata->deflink.u.mgd.bssid; 7813 int max_tries; 7814 7815 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7816 max_tries = max_nullfunc_tries; 7817 else 7818 max_tries = max_probe_tries; 7819 7820 /* ACK received for nullfunc probing frame */ 7821 if (!ifmgd->probe_send_count) 7822 ieee80211_reset_ap_probe(sdata); 7823 else if (ifmgd->nullfunc_failed) { 7824 if (ifmgd->probe_send_count < max_tries) { 7825 mlme_dbg(sdata, 7826 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7827 bssid, ifmgd->probe_send_count, 7828 max_tries); 7829 ieee80211_mgd_probe_ap_send(sdata); 7830 } else { 7831 mlme_dbg(sdata, 7832 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7833 bssid); 7834 ieee80211_sta_connection_lost(sdata, 7835 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7836 false); 7837 } 7838 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7839 run_again(sdata, ifmgd->probe_timeout); 7840 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7841 mlme_dbg(sdata, 7842 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7843 bssid, probe_wait_ms); 7844 ieee80211_sta_connection_lost(sdata, 7845 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7846 } else if (ifmgd->probe_send_count < max_tries) { 7847 mlme_dbg(sdata, 7848 "No probe response from AP %pM after %dms, try %d/%i\n", 7849 bssid, probe_wait_ms, 7850 ifmgd->probe_send_count, max_tries); 7851 ieee80211_mgd_probe_ap_send(sdata); 7852 } else { 7853 /* 7854 * We actually lost the connection ... or did we? 7855 * Let's make sure! 7856 */ 7857 mlme_dbg(sdata, 7858 "No probe response from AP %pM after %dms, disconnecting.\n", 7859 bssid, probe_wait_ms); 7860 7861 ieee80211_sta_connection_lost(sdata, 7862 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7863 } 7864 } 7865 } 7866 7867 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7868 { 7869 struct ieee80211_sub_if_data *sdata = 7870 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7871 7872 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7873 return; 7874 7875 if (sdata->vif.bss_conf.csa_active && 7876 !sdata->deflink.u.mgd.csa.waiting_bcn) 7877 return; 7878 7879 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7880 return; 7881 7882 sdata->u.mgd.connection_loss = false; 7883 wiphy_work_queue(sdata->local->hw.wiphy, 7884 &sdata->u.mgd.beacon_connection_loss_work); 7885 } 7886 7887 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7888 { 7889 struct ieee80211_sub_if_data *sdata = 7890 from_timer(sdata, t, u.mgd.conn_mon_timer); 7891 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7892 struct ieee80211_local *local = sdata->local; 7893 struct sta_info *sta; 7894 unsigned long timeout; 7895 7896 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7897 return; 7898 7899 if (sdata->vif.bss_conf.csa_active && 7900 !sdata->deflink.u.mgd.csa.waiting_bcn) 7901 return; 7902 7903 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7904 if (!sta) 7905 return; 7906 7907 timeout = sta->deflink.status_stats.last_ack; 7908 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7909 timeout = sta->deflink.rx_stats.last_rx; 7910 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7911 7912 /* If timeout is after now, then update timer to fire at 7913 * the later date, but do not actually probe at this time. 7914 */ 7915 if (time_is_after_jiffies(timeout)) { 7916 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7917 return; 7918 } 7919 7920 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7921 } 7922 7923 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7924 struct wiphy_work *work) 7925 { 7926 struct ieee80211_sub_if_data *sdata = 7927 container_of(work, struct ieee80211_sub_if_data, 7928 u.mgd.monitor_work); 7929 7930 ieee80211_mgd_probe_ap(sdata, false); 7931 } 7932 7933 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7934 { 7935 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7936 __ieee80211_stop_poll(sdata); 7937 7938 /* let's probe the connection once */ 7939 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7940 wiphy_work_queue(sdata->local->hw.wiphy, 7941 &sdata->u.mgd.monitor_work); 7942 } 7943 } 7944 7945 #ifdef CONFIG_PM 7946 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7947 { 7948 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7949 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7950 7951 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7952 7953 if (ifmgd->auth_data || ifmgd->assoc_data) { 7954 const u8 *ap_addr = ifmgd->auth_data ? 7955 ifmgd->auth_data->ap_addr : 7956 ifmgd->assoc_data->ap_addr; 7957 7958 /* 7959 * If we are trying to authenticate / associate while suspending, 7960 * cfg80211 won't know and won't actually abort those attempts, 7961 * thus we need to do that ourselves. 7962 */ 7963 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7964 IEEE80211_STYPE_DEAUTH, 7965 WLAN_REASON_DEAUTH_LEAVING, 7966 false, frame_buf); 7967 if (ifmgd->assoc_data) 7968 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7969 if (ifmgd->auth_data) 7970 ieee80211_destroy_auth_data(sdata, false); 7971 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7972 IEEE80211_DEAUTH_FRAME_LEN, 7973 false); 7974 } 7975 7976 /* This is a bit of a hack - we should find a better and more generic 7977 * solution to this. Normally when suspending, cfg80211 will in fact 7978 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7979 * auth (not so important) or assoc (this is the problem) process. 7980 * 7981 * As a consequence, it can happen that we are in the process of both 7982 * associating and suspending, and receive an association response 7983 * after cfg80211 has checked if it needs to disconnect, but before 7984 * we actually set the flag to drop incoming frames. This will then 7985 * cause the workqueue flush to process the association response in 7986 * the suspend, resulting in a successful association just before it 7987 * tries to remove the interface from the driver, which now though 7988 * has a channel context assigned ... this results in issues. 7989 * 7990 * To work around this (for now) simply deauth here again if we're 7991 * now connected. 7992 */ 7993 if (ifmgd->associated && !sdata->local->wowlan) { 7994 u8 bssid[ETH_ALEN]; 7995 struct cfg80211_deauth_request req = { 7996 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 7997 .bssid = bssid, 7998 }; 7999 8000 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8001 ieee80211_mgd_deauth(sdata, &req); 8002 } 8003 } 8004 #endif 8005 8006 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8007 { 8008 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8009 8010 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8011 8012 if (!ifmgd->associated) 8013 return; 8014 8015 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8016 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8017 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8018 ieee80211_sta_connection_lost(sdata, 8019 WLAN_REASON_UNSPECIFIED, 8020 true); 8021 return; 8022 } 8023 8024 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8025 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8026 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8027 ieee80211_sta_connection_lost(sdata, 8028 WLAN_REASON_UNSPECIFIED, 8029 true); 8030 return; 8031 } 8032 } 8033 8034 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8035 struct wiphy_work *work) 8036 { 8037 struct ieee80211_link_data *link = 8038 container_of(work, struct ieee80211_link_data, 8039 u.mgd.request_smps_work); 8040 8041 __ieee80211_request_smps_mgd(link->sdata, link, 8042 link->u.mgd.driver_smps_mode); 8043 } 8044 8045 /* interface setup */ 8046 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8047 { 8048 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8049 8050 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8051 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8052 ieee80211_beacon_connection_loss_work); 8053 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8054 ieee80211_csa_connection_drop_work); 8055 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8056 ieee80211_tdls_peer_del_work); 8057 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8058 ieee80211_ml_reconf_work); 8059 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8060 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8061 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8062 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8063 ieee80211_sta_handle_tspec_ac_params_wk); 8064 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8065 ieee80211_tid_to_link_map_work); 8066 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8067 ieee80211_neg_ttlm_timeout_work); 8068 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8069 ieee80211_teardown_ttlm_work); 8070 8071 ifmgd->flags = 0; 8072 ifmgd->powersave = sdata->wdev.ps; 8073 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8074 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8075 /* Setup TDLS data */ 8076 spin_lock_init(&ifmgd->teardown_lock); 8077 ifmgd->teardown_skb = NULL; 8078 ifmgd->orig_teardown_skb = NULL; 8079 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8080 } 8081 8082 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8083 struct wiphy_work *work) 8084 { 8085 struct ieee80211_link_data *link = 8086 container_of(work, struct ieee80211_link_data, 8087 u.mgd.recalc_smps); 8088 8089 ieee80211_recalc_smps(link->sdata, link); 8090 } 8091 8092 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8093 { 8094 struct ieee80211_sub_if_data *sdata = link->sdata; 8095 struct ieee80211_local *local = sdata->local; 8096 unsigned int link_id = link->link_id; 8097 8098 link->u.mgd.p2p_noa_index = -1; 8099 link->conf->bssid = link->u.mgd.bssid; 8100 link->smps_mode = IEEE80211_SMPS_OFF; 8101 8102 wiphy_work_init(&link->u.mgd.request_smps_work, 8103 ieee80211_request_smps_mgd_work); 8104 wiphy_work_init(&link->u.mgd.recalc_smps, 8105 ieee80211_recalc_smps_work); 8106 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8107 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8108 else 8109 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8110 8111 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8112 ieee80211_csa_switch_work); 8113 8114 ieee80211_clear_tpe(&link->conf->tpe); 8115 8116 if (sdata->u.mgd.assoc_data) 8117 ether_addr_copy(link->conf->addr, 8118 sdata->u.mgd.assoc_data->link[link_id].addr); 8119 else if (!is_valid_ether_addr(link->conf->addr)) 8120 eth_random_addr(link->conf->addr); 8121 } 8122 8123 /* scan finished notification */ 8124 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8125 { 8126 struct ieee80211_sub_if_data *sdata; 8127 8128 /* Restart STA timers */ 8129 rcu_read_lock(); 8130 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8131 if (ieee80211_sdata_running(sdata)) 8132 ieee80211_restart_sta_timer(sdata); 8133 } 8134 rcu_read_unlock(); 8135 } 8136 8137 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8138 struct cfg80211_bss *cbss, s8 link_id, 8139 const u8 *ap_mld_addr, bool assoc, 8140 struct ieee80211_conn_settings *conn, 8141 bool override) 8142 { 8143 struct ieee80211_local *local = sdata->local; 8144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8145 struct ieee80211_bss *bss = (void *)cbss->priv; 8146 struct sta_info *new_sta = NULL; 8147 struct ieee80211_link_data *link; 8148 bool have_sta = false; 8149 bool mlo; 8150 int err; 8151 8152 if (link_id >= 0) { 8153 mlo = true; 8154 if (WARN_ON(!ap_mld_addr)) 8155 return -EINVAL; 8156 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8157 } else { 8158 if (WARN_ON(ap_mld_addr)) 8159 return -EINVAL; 8160 ap_mld_addr = cbss->bssid; 8161 err = ieee80211_vif_set_links(sdata, 0, 0); 8162 link_id = 0; 8163 mlo = false; 8164 } 8165 8166 if (err) 8167 return err; 8168 8169 link = sdata_dereference(sdata->link[link_id], sdata); 8170 if (WARN_ON(!link)) { 8171 err = -ENOLINK; 8172 goto out_err; 8173 } 8174 8175 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8176 err = -EINVAL; 8177 goto out_err; 8178 } 8179 8180 /* If a reconfig is happening, bail out */ 8181 if (local->in_reconfig) { 8182 err = -EBUSY; 8183 goto out_err; 8184 } 8185 8186 if (assoc) { 8187 rcu_read_lock(); 8188 have_sta = sta_info_get(sdata, ap_mld_addr); 8189 rcu_read_unlock(); 8190 } 8191 8192 if (!have_sta) { 8193 if (mlo) 8194 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8195 link_id, cbss->bssid, 8196 GFP_KERNEL); 8197 else 8198 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8199 8200 if (!new_sta) { 8201 err = -ENOMEM; 8202 goto out_err; 8203 } 8204 8205 new_sta->sta.mlo = mlo; 8206 } 8207 8208 /* 8209 * Set up the information for the new channel before setting the 8210 * new channel. We can't - completely race-free - change the basic 8211 * rates bitmap and the channel (sband) that it refers to, but if 8212 * we set it up before we at least avoid calling into the driver's 8213 * bss_info_changed() method with invalid information (since we do 8214 * call that from changing the channel - only for IDLE and perhaps 8215 * some others, but ...). 8216 * 8217 * So to avoid that, just set up all the new information before the 8218 * channel, but tell the driver to apply it only afterwards, since 8219 * it might need the new channel for that. 8220 */ 8221 if (new_sta) { 8222 const struct cfg80211_bss_ies *ies; 8223 struct link_sta_info *link_sta; 8224 8225 rcu_read_lock(); 8226 link_sta = rcu_dereference(new_sta->link[link_id]); 8227 if (WARN_ON(!link_sta)) { 8228 rcu_read_unlock(); 8229 sta_info_free(local, new_sta); 8230 err = -EINVAL; 8231 goto out_err; 8232 } 8233 8234 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8235 link_sta, cbss); 8236 if (err) { 8237 rcu_read_unlock(); 8238 sta_info_free(local, new_sta); 8239 goto out_err; 8240 } 8241 8242 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8243 8244 /* set timing information */ 8245 link->conf->beacon_int = cbss->beacon_interval; 8246 ies = rcu_dereference(cbss->beacon_ies); 8247 if (ies) { 8248 link->conf->sync_tsf = ies->tsf; 8249 link->conf->sync_device_ts = 8250 bss->device_ts_beacon; 8251 8252 ieee80211_get_dtim(ies, 8253 &link->conf->sync_dtim_count, 8254 NULL); 8255 } else if (!ieee80211_hw_check(&sdata->local->hw, 8256 TIMING_BEACON_ONLY)) { 8257 ies = rcu_dereference(cbss->proberesp_ies); 8258 /* must be non-NULL since beacon IEs were NULL */ 8259 link->conf->sync_tsf = ies->tsf; 8260 link->conf->sync_device_ts = 8261 bss->device_ts_presp; 8262 link->conf->sync_dtim_count = 0; 8263 } else { 8264 link->conf->sync_tsf = 0; 8265 link->conf->sync_device_ts = 0; 8266 link->conf->sync_dtim_count = 0; 8267 } 8268 rcu_read_unlock(); 8269 } 8270 8271 if (new_sta || override) { 8272 /* 8273 * Only set this if we're also going to calculate the AP 8274 * settings etc., otherwise this was set before in a 8275 * previous call. Note override is set to %true in assoc 8276 * if the settings were changed. 8277 */ 8278 link->u.mgd.conn = *conn; 8279 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8280 mlo, &link->u.mgd.conn); 8281 if (err) { 8282 if (new_sta) 8283 sta_info_free(local, new_sta); 8284 goto out_err; 8285 } 8286 /* pass out for use in assoc */ 8287 *conn = link->u.mgd.conn; 8288 } 8289 8290 if (new_sta) { 8291 /* 8292 * tell driver about BSSID, basic rates and timing 8293 * this was set up above, before setting the channel 8294 */ 8295 ieee80211_link_info_change_notify(sdata, link, 8296 BSS_CHANGED_BSSID | 8297 BSS_CHANGED_BASIC_RATES | 8298 BSS_CHANGED_BEACON_INT); 8299 8300 if (assoc) 8301 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8302 8303 err = sta_info_insert(new_sta); 8304 new_sta = NULL; 8305 if (err) { 8306 sdata_info(sdata, 8307 "failed to insert STA entry for the AP (error %d)\n", 8308 err); 8309 goto out_release_chan; 8310 } 8311 } else 8312 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8313 8314 /* Cancel scan to ensure that nothing interferes with connection */ 8315 if (local->scanning) 8316 ieee80211_scan_cancel(local); 8317 8318 return 0; 8319 8320 out_release_chan: 8321 ieee80211_link_release_channel(link); 8322 out_err: 8323 ieee80211_vif_set_links(sdata, 0, 0); 8324 return err; 8325 } 8326 8327 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8328 const struct cfg80211_bss_ies *ies, 8329 u8 cur_channel, bool ignore_ecsa) 8330 { 8331 const struct element *csa_elem, *ecsa_elem; 8332 struct ieee80211_channel_sw_ie *csa = NULL; 8333 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8334 8335 if (!ies) 8336 return false; 8337 8338 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8339 ies->data, ies->len); 8340 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8341 csa = (void *)csa_elem->data; 8342 8343 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8344 ies->data, ies->len); 8345 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8346 ecsa = (void *)ecsa_elem->data; 8347 8348 if (csa && csa->count == 0) 8349 csa = NULL; 8350 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8351 csa = NULL; 8352 8353 if (ecsa && ecsa->count == 0) 8354 ecsa = NULL; 8355 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8356 ecsa = NULL; 8357 8358 if (ignore_ecsa && ecsa) { 8359 sdata_info(sdata, 8360 "Ignoring ECSA in probe response - was considered stuck!\n"); 8361 return csa; 8362 } 8363 8364 return csa || ecsa; 8365 } 8366 8367 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8368 struct cfg80211_bss *bss) 8369 { 8370 u8 cur_channel; 8371 bool ret; 8372 8373 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8374 8375 rcu_read_lock(); 8376 if (ieee80211_mgd_csa_present(sdata, 8377 rcu_dereference(bss->beacon_ies), 8378 cur_channel, false)) { 8379 ret = true; 8380 goto out; 8381 } 8382 8383 if (ieee80211_mgd_csa_present(sdata, 8384 rcu_dereference(bss->proberesp_ies), 8385 cur_channel, bss->proberesp_ecsa_stuck)) { 8386 ret = true; 8387 goto out; 8388 } 8389 8390 ret = false; 8391 out: 8392 rcu_read_unlock(); 8393 return ret; 8394 } 8395 8396 /* config hooks */ 8397 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8398 struct cfg80211_auth_request *req) 8399 { 8400 struct ieee80211_local *local = sdata->local; 8401 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8402 struct ieee80211_mgd_auth_data *auth_data; 8403 struct ieee80211_conn_settings conn; 8404 struct ieee80211_link_data *link; 8405 struct ieee80211_supported_band *sband; 8406 struct ieee80211_bss *bss; 8407 u16 auth_alg; 8408 int err; 8409 bool cont_auth, wmm_used; 8410 8411 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8412 8413 /* prepare auth data structure */ 8414 8415 switch (req->auth_type) { 8416 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8417 auth_alg = WLAN_AUTH_OPEN; 8418 break; 8419 case NL80211_AUTHTYPE_SHARED_KEY: 8420 if (fips_enabled) 8421 return -EOPNOTSUPP; 8422 auth_alg = WLAN_AUTH_SHARED_KEY; 8423 break; 8424 case NL80211_AUTHTYPE_FT: 8425 auth_alg = WLAN_AUTH_FT; 8426 break; 8427 case NL80211_AUTHTYPE_NETWORK_EAP: 8428 auth_alg = WLAN_AUTH_LEAP; 8429 break; 8430 case NL80211_AUTHTYPE_SAE: 8431 auth_alg = WLAN_AUTH_SAE; 8432 break; 8433 case NL80211_AUTHTYPE_FILS_SK: 8434 auth_alg = WLAN_AUTH_FILS_SK; 8435 break; 8436 case NL80211_AUTHTYPE_FILS_SK_PFS: 8437 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8438 break; 8439 case NL80211_AUTHTYPE_FILS_PK: 8440 auth_alg = WLAN_AUTH_FILS_PK; 8441 break; 8442 default: 8443 return -EOPNOTSUPP; 8444 } 8445 8446 if (ifmgd->assoc_data) 8447 return -EBUSY; 8448 8449 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8450 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8451 return -EINVAL; 8452 } 8453 8454 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8455 req->ie_len, GFP_KERNEL); 8456 if (!auth_data) 8457 return -ENOMEM; 8458 8459 memcpy(auth_data->ap_addr, 8460 req->ap_mld_addr ?: req->bss->bssid, 8461 ETH_ALEN); 8462 auth_data->bss = req->bss; 8463 auth_data->link_id = req->link_id; 8464 8465 if (req->auth_data_len >= 4) { 8466 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8467 __le16 *pos = (__le16 *) req->auth_data; 8468 8469 auth_data->sae_trans = le16_to_cpu(pos[0]); 8470 auth_data->sae_status = le16_to_cpu(pos[1]); 8471 } 8472 memcpy(auth_data->data, req->auth_data + 4, 8473 req->auth_data_len - 4); 8474 auth_data->data_len += req->auth_data_len - 4; 8475 } 8476 8477 /* Check if continuing authentication or trying to authenticate with the 8478 * same BSS that we were in the process of authenticating with and avoid 8479 * removal and re-addition of the STA entry in 8480 * ieee80211_prep_connection(). 8481 */ 8482 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8483 ifmgd->auth_data->link_id == req->link_id; 8484 8485 if (req->ie && req->ie_len) { 8486 memcpy(&auth_data->data[auth_data->data_len], 8487 req->ie, req->ie_len); 8488 auth_data->data_len += req->ie_len; 8489 } 8490 8491 if (req->key && req->key_len) { 8492 auth_data->key_len = req->key_len; 8493 auth_data->key_idx = req->key_idx; 8494 memcpy(auth_data->key, req->key, req->key_len); 8495 } 8496 8497 auth_data->algorithm = auth_alg; 8498 8499 /* try to authenticate/probe */ 8500 8501 if (ifmgd->auth_data) { 8502 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8503 auth_data->peer_confirmed = 8504 ifmgd->auth_data->peer_confirmed; 8505 } 8506 ieee80211_destroy_auth_data(sdata, cont_auth); 8507 } 8508 8509 /* prep auth_data so we don't go into idle on disassoc */ 8510 ifmgd->auth_data = auth_data; 8511 8512 /* If this is continuation of an ongoing SAE authentication exchange 8513 * (i.e., request to send SAE Confirm) and the peer has already 8514 * confirmed, mark authentication completed since we are about to send 8515 * out SAE Confirm. 8516 */ 8517 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8518 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8519 ieee80211_mark_sta_auth(sdata); 8520 8521 if (ifmgd->associated) { 8522 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8523 8524 sdata_info(sdata, 8525 "disconnect from AP %pM for new auth to %pM\n", 8526 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8527 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8528 WLAN_REASON_UNSPECIFIED, 8529 false, frame_buf); 8530 8531 ieee80211_report_disconnect(sdata, frame_buf, 8532 sizeof(frame_buf), true, 8533 WLAN_REASON_UNSPECIFIED, 8534 false); 8535 } 8536 8537 /* needed for transmitting the auth frame(s) properly */ 8538 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8539 8540 bss = (void *)req->bss->priv; 8541 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8542 8543 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8544 8545 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8546 &conn); 8547 8548 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8549 req->ap_mld_addr, cont_auth, 8550 &conn, false); 8551 if (err) 8552 goto err_clear; 8553 8554 if (req->link_id >= 0) 8555 link = sdata_dereference(sdata->link[req->link_id], sdata); 8556 else 8557 link = &sdata->deflink; 8558 8559 if (WARN_ON(!link)) { 8560 err = -ENOLINK; 8561 goto err_clear; 8562 } 8563 8564 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8565 auth_data->ap_addr, link->conf->addr); 8566 8567 err = ieee80211_auth(sdata); 8568 if (err) { 8569 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8570 goto err_clear; 8571 } 8572 8573 /* hold our own reference */ 8574 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8575 return 0; 8576 8577 err_clear: 8578 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8579 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8580 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8581 BSS_CHANGED_BSSID); 8582 ieee80211_link_release_channel(&sdata->deflink); 8583 } 8584 ifmgd->auth_data = NULL; 8585 kfree(auth_data); 8586 return err; 8587 } 8588 8589 static void 8590 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8591 struct ieee80211_mgd_assoc_data *assoc_data, 8592 struct cfg80211_assoc_request *req, 8593 struct ieee80211_conn_settings *conn, 8594 unsigned int link_id) 8595 { 8596 struct ieee80211_local *local = sdata->local; 8597 const struct cfg80211_bss_ies *bss_ies; 8598 struct ieee80211_supported_band *sband; 8599 struct ieee80211_link_data *link; 8600 struct cfg80211_bss *cbss; 8601 struct ieee80211_bss *bss; 8602 8603 cbss = assoc_data->link[link_id].bss; 8604 if (WARN_ON(!cbss)) 8605 return; 8606 8607 bss = (void *)cbss->priv; 8608 8609 sband = local->hw.wiphy->bands[cbss->channel->band]; 8610 if (WARN_ON(!sband)) 8611 return; 8612 8613 link = sdata_dereference(sdata->link[link_id], sdata); 8614 if (WARN_ON(!link)) 8615 return; 8616 8617 /* for MLO connections assume advertising all rates is OK */ 8618 if (!req->ap_mld_addr) { 8619 assoc_data->supp_rates = bss->supp_rates; 8620 assoc_data->supp_rates_len = bss->supp_rates_len; 8621 } 8622 8623 /* copy and link elems for the STA profile */ 8624 if (req->links[link_id].elems_len) { 8625 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8626 req->links[link_id].elems_len); 8627 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8628 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8629 assoc_data->ie_pos += req->links[link_id].elems_len; 8630 } 8631 8632 link->u.mgd.beacon_crc_valid = false; 8633 link->u.mgd.dtim_period = 0; 8634 link->u.mgd.have_beacon = false; 8635 8636 /* override HT configuration only if the AP and we support it */ 8637 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8638 struct ieee80211_sta_ht_cap sta_ht_cap; 8639 8640 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8641 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8642 } 8643 8644 rcu_read_lock(); 8645 bss_ies = rcu_dereference(cbss->beacon_ies); 8646 if (bss_ies) { 8647 u8 dtim_count = 0; 8648 8649 ieee80211_get_dtim(bss_ies, &dtim_count, 8650 &link->u.mgd.dtim_period); 8651 8652 sdata->deflink.u.mgd.have_beacon = true; 8653 8654 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8655 link->conf->sync_tsf = bss_ies->tsf; 8656 link->conf->sync_device_ts = bss->device_ts_beacon; 8657 link->conf->sync_dtim_count = dtim_count; 8658 } 8659 } else { 8660 bss_ies = rcu_dereference(cbss->ies); 8661 } 8662 8663 if (bss_ies) { 8664 const struct element *elem; 8665 8666 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8667 bss_ies->data, bss_ies->len); 8668 if (elem && elem->datalen >= 3) 8669 link->conf->profile_periodicity = elem->data[2]; 8670 else 8671 link->conf->profile_periodicity = 0; 8672 8673 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8674 bss_ies->data, bss_ies->len); 8675 if (elem && elem->datalen >= 11 && 8676 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8677 link->conf->ema_ap = true; 8678 else 8679 link->conf->ema_ap = false; 8680 } 8681 rcu_read_unlock(); 8682 8683 if (bss->corrupt_data) { 8684 char *corrupt_type = "data"; 8685 8686 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8687 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8688 corrupt_type = "beacon and probe response"; 8689 else 8690 corrupt_type = "beacon"; 8691 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8692 corrupt_type = "probe response"; 8693 } 8694 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8695 cbss->bssid, corrupt_type); 8696 } 8697 8698 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8699 if (sdata->u.mgd.powersave) 8700 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8701 else 8702 link->smps_mode = IEEE80211_SMPS_OFF; 8703 } else { 8704 link->smps_mode = link->u.mgd.req_smps; 8705 } 8706 } 8707 8708 static int 8709 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8710 struct ieee80211_mgd_assoc_data *assoc_data, 8711 int link_id) 8712 { 8713 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8714 enum nl80211_band band = cbss->channel->band; 8715 struct ieee80211_supported_band *sband; 8716 const struct element *elem; 8717 int err; 8718 8719 /* neither HT nor VHT elements used on 6 GHz */ 8720 if (band == NL80211_BAND_6GHZ) 8721 return 0; 8722 8723 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8724 return 0; 8725 8726 rcu_read_lock(); 8727 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8728 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8729 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8730 cbss->bssid); 8731 err = -EINVAL; 8732 goto out_rcu; 8733 } 8734 assoc_data->link[link_id].ap_ht_param = 8735 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8736 rcu_read_unlock(); 8737 8738 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8739 return 0; 8740 8741 /* some drivers want to support VHT on 2.4 GHz even */ 8742 sband = sdata->local->hw.wiphy->bands[band]; 8743 if (!sband->vht_cap.vht_supported) 8744 return 0; 8745 8746 rcu_read_lock(); 8747 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8748 /* but even then accept it not being present on the AP */ 8749 if (!elem && band == NL80211_BAND_2GHZ) { 8750 err = 0; 8751 goto out_rcu; 8752 } 8753 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8754 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8755 cbss->bssid); 8756 err = -EINVAL; 8757 goto out_rcu; 8758 } 8759 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8760 sizeof(struct ieee80211_vht_cap)); 8761 rcu_read_unlock(); 8762 8763 return 0; 8764 out_rcu: 8765 rcu_read_unlock(); 8766 return err; 8767 } 8768 8769 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8770 struct cfg80211_assoc_request *req) 8771 { 8772 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8773 struct ieee80211_local *local = sdata->local; 8774 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8775 struct ieee80211_mgd_assoc_data *assoc_data; 8776 const struct element *ssid_elem; 8777 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8778 struct ieee80211_link_data *link; 8779 struct cfg80211_bss *cbss; 8780 bool override, uapsd_supported; 8781 bool match_auth; 8782 int i, err; 8783 size_t size = sizeof(*assoc_data) + req->ie_len; 8784 8785 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8786 size += req->links[i].elems_len; 8787 8788 /* FIXME: no support for 4-addr MLO yet */ 8789 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8790 return -EOPNOTSUPP; 8791 8792 assoc_data = kzalloc(size, GFP_KERNEL); 8793 if (!assoc_data) 8794 return -ENOMEM; 8795 8796 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8797 8798 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8799 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8800 err = -EINVAL; 8801 goto err_free; 8802 } 8803 8804 rcu_read_lock(); 8805 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8806 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8807 rcu_read_unlock(); 8808 err = -EINVAL; 8809 goto err_free; 8810 } 8811 8812 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8813 assoc_data->ssid_len = ssid_elem->datalen; 8814 rcu_read_unlock(); 8815 8816 if (req->ap_mld_addr) 8817 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8818 else 8819 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8820 8821 if (ifmgd->associated) { 8822 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8823 8824 sdata_info(sdata, 8825 "disconnect from AP %pM for new assoc to %pM\n", 8826 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8827 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8828 WLAN_REASON_UNSPECIFIED, 8829 false, frame_buf); 8830 8831 ieee80211_report_disconnect(sdata, frame_buf, 8832 sizeof(frame_buf), true, 8833 WLAN_REASON_UNSPECIFIED, 8834 false); 8835 } 8836 8837 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8838 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8839 sizeof(ifmgd->ht_capa_mask)); 8840 8841 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8842 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8843 sizeof(ifmgd->vht_capa_mask)); 8844 8845 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8846 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8847 sizeof(ifmgd->s1g_capa_mask)); 8848 8849 /* keep some setup (AP STA, channel, ...) if matching */ 8850 match_auth = ifmgd->auth_data && 8851 ether_addr_equal(ifmgd->auth_data->ap_addr, 8852 assoc_data->ap_addr) && 8853 ifmgd->auth_data->link_id == req->link_id; 8854 8855 if (req->ap_mld_addr) { 8856 uapsd_supported = true; 8857 8858 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8859 ASSOC_REQ_DISABLE_VHT | 8860 ASSOC_REQ_DISABLE_HE | 8861 ASSOC_REQ_DISABLE_EHT)) { 8862 err = -EINVAL; 8863 goto err_free; 8864 } 8865 8866 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8867 struct ieee80211_supported_band *sband; 8868 struct cfg80211_bss *link_cbss = req->links[i].bss; 8869 struct ieee80211_bss *bss; 8870 8871 if (!link_cbss) 8872 continue; 8873 8874 bss = (void *)link_cbss->priv; 8875 8876 if (!bss->wmm_used) { 8877 err = -EINVAL; 8878 req->links[i].error = err; 8879 goto err_free; 8880 } 8881 8882 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8883 err = -EINVAL; 8884 req->links[i].error = err; 8885 goto err_free; 8886 } 8887 8888 link = sdata_dereference(sdata->link[i], sdata); 8889 if (link) 8890 ether_addr_copy(assoc_data->link[i].addr, 8891 link->conf->addr); 8892 else 8893 eth_random_addr(assoc_data->link[i].addr); 8894 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8895 8896 if (match_auth && i == assoc_link_id && link) 8897 assoc_data->link[i].conn = link->u.mgd.conn; 8898 else 8899 assoc_data->link[i].conn = 8900 ieee80211_conn_settings_unlimited; 8901 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8902 req, true, i, 8903 &assoc_data->link[i].conn); 8904 assoc_data->link[i].bss = link_cbss; 8905 assoc_data->link[i].disabled = req->links[i].disabled; 8906 8907 if (!bss->uapsd_supported) 8908 uapsd_supported = false; 8909 8910 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 8911 err = -EINVAL; 8912 req->links[i].error = err; 8913 goto err_free; 8914 } 8915 8916 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 8917 assoc_data, i); 8918 if (err) { 8919 err = -EINVAL; 8920 req->links[i].error = err; 8921 goto err_free; 8922 } 8923 } 8924 8925 assoc_data->wmm = true; 8926 } else { 8927 struct ieee80211_supported_band *sband; 8928 struct ieee80211_bss *bss = (void *)cbss->priv; 8929 8930 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8931 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8932 8933 assoc_data->wmm = bss->wmm_used && 8934 (local->hw.queues >= IEEE80211_NUM_ACS); 8935 8936 if (cbss->channel->band == NL80211_BAND_6GHZ && 8937 req->flags & (ASSOC_REQ_DISABLE_HT | 8938 ASSOC_REQ_DISABLE_VHT | 8939 ASSOC_REQ_DISABLE_HE)) { 8940 err = -EINVAL; 8941 goto err_free; 8942 } 8943 8944 sband = local->hw.wiphy->bands[cbss->channel->band]; 8945 8946 assoc_data->link[0].bss = cbss; 8947 8948 if (match_auth) 8949 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 8950 else 8951 assoc_data->link[0].conn = 8952 ieee80211_conn_settings_unlimited; 8953 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 8954 assoc_data->wmm, 0, 8955 &assoc_data->link[0].conn); 8956 8957 uapsd_supported = bss->uapsd_supported; 8958 8959 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 8960 if (err) 8961 goto err_free; 8962 } 8963 8964 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8965 8966 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8967 err = -EBUSY; 8968 goto err_free; 8969 } 8970 8971 if (ifmgd->assoc_data) { 8972 err = -EBUSY; 8973 goto err_free; 8974 } 8975 8976 /* Cleanup is delayed if auth_data matches */ 8977 if (ifmgd->auth_data && !match_auth) 8978 ieee80211_destroy_auth_data(sdata, false); 8979 8980 if (req->ie && req->ie_len) { 8981 memcpy(assoc_data->ie, req->ie, req->ie_len); 8982 assoc_data->ie_len = req->ie_len; 8983 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 8984 } else { 8985 assoc_data->ie_pos = assoc_data->ie; 8986 } 8987 8988 if (req->fils_kek) { 8989 /* should already be checked in cfg80211 - so warn */ 8990 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 8991 err = -EINVAL; 8992 goto err_free; 8993 } 8994 memcpy(assoc_data->fils_kek, req->fils_kek, 8995 req->fils_kek_len); 8996 assoc_data->fils_kek_len = req->fils_kek_len; 8997 } 8998 8999 if (req->fils_nonces) 9000 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9001 2 * FILS_NONCE_LEN); 9002 9003 /* default timeout */ 9004 assoc_data->timeout = jiffies; 9005 assoc_data->timeout_started = true; 9006 9007 assoc_data->assoc_link_id = assoc_link_id; 9008 9009 if (req->ap_mld_addr) { 9010 /* if there was no authentication, set up the link */ 9011 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9012 if (err) 9013 goto err_clear; 9014 } 9015 9016 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9017 if (WARN_ON(!link)) { 9018 err = -EINVAL; 9019 goto err_clear; 9020 } 9021 9022 override = link->u.mgd.conn.mode != 9023 assoc_data->link[assoc_link_id].conn.mode || 9024 link->u.mgd.conn.bw_limit != 9025 assoc_data->link[assoc_link_id].conn.bw_limit; 9026 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9027 9028 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9029 assoc_link_id); 9030 9031 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9032 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9033 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9034 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9035 9036 if (assoc_data->wmm && uapsd_supported && 9037 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9038 assoc_data->uapsd = true; 9039 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9040 } else { 9041 assoc_data->uapsd = false; 9042 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9043 } 9044 9045 if (req->prev_bssid) 9046 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9047 9048 if (req->use_mfp) { 9049 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9050 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9051 } else { 9052 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9053 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9054 } 9055 9056 if (req->flags & ASSOC_REQ_USE_RRM) 9057 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9058 else 9059 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9060 9061 if (req->crypto.control_port) 9062 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9063 else 9064 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9065 9066 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9067 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9068 sdata->control_port_over_nl80211 = 9069 req->crypto.control_port_over_nl80211; 9070 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9071 9072 /* kick off associate process */ 9073 ifmgd->assoc_data = assoc_data; 9074 9075 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9076 if (!assoc_data->link[i].bss) 9077 continue; 9078 if (i == assoc_data->assoc_link_id) 9079 continue; 9080 /* only calculate the mode, hence link == NULL */ 9081 err = ieee80211_prep_channel(sdata, NULL, i, 9082 assoc_data->link[i].bss, true, 9083 &assoc_data->link[i].conn); 9084 if (err) { 9085 req->links[i].error = err; 9086 goto err_clear; 9087 } 9088 } 9089 9090 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9091 vif_cfg->ssid_len = assoc_data->ssid_len; 9092 9093 /* needed for transmitting the assoc frames properly */ 9094 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9095 9096 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9097 req->ap_mld_addr, true, 9098 &assoc_data->link[assoc_link_id].conn, 9099 override); 9100 if (err) 9101 goto err_clear; 9102 9103 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9104 const struct cfg80211_bss_ies *beacon_ies; 9105 9106 rcu_read_lock(); 9107 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9108 if (!beacon_ies) { 9109 /* 9110 * Wait up to one beacon interval ... 9111 * should this be more if we miss one? 9112 */ 9113 sdata_info(sdata, "waiting for beacon from %pM\n", 9114 link->u.mgd.bssid); 9115 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9116 assoc_data->timeout_started = true; 9117 assoc_data->need_beacon = true; 9118 } 9119 rcu_read_unlock(); 9120 } 9121 9122 run_again(sdata, assoc_data->timeout); 9123 9124 /* We are associating, clean up auth_data */ 9125 if (ifmgd->auth_data) 9126 ieee80211_destroy_auth_data(sdata, true); 9127 9128 return 0; 9129 err_clear: 9130 if (!ifmgd->auth_data) { 9131 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9132 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9133 BSS_CHANGED_BSSID); 9134 } 9135 ifmgd->assoc_data = NULL; 9136 err_free: 9137 kfree(assoc_data); 9138 return err; 9139 } 9140 9141 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9142 struct cfg80211_deauth_request *req) 9143 { 9144 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9145 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9146 bool tx = !req->local_state_change; 9147 struct ieee80211_prep_tx_info info = { 9148 .subtype = IEEE80211_STYPE_DEAUTH, 9149 }; 9150 9151 if (ifmgd->auth_data && 9152 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9153 sdata_info(sdata, 9154 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9155 req->bssid, req->reason_code, 9156 ieee80211_get_reason_code_string(req->reason_code)); 9157 9158 info.link_id = ifmgd->auth_data->link_id; 9159 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9160 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9161 IEEE80211_STYPE_DEAUTH, 9162 req->reason_code, tx, 9163 frame_buf); 9164 ieee80211_destroy_auth_data(sdata, false); 9165 ieee80211_report_disconnect(sdata, frame_buf, 9166 sizeof(frame_buf), true, 9167 req->reason_code, false); 9168 drv_mgd_complete_tx(sdata->local, sdata, &info); 9169 return 0; 9170 } 9171 9172 if (ifmgd->assoc_data && 9173 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9174 sdata_info(sdata, 9175 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9176 req->bssid, req->reason_code, 9177 ieee80211_get_reason_code_string(req->reason_code)); 9178 9179 info.link_id = ifmgd->assoc_data->assoc_link_id; 9180 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9181 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9182 IEEE80211_STYPE_DEAUTH, 9183 req->reason_code, tx, 9184 frame_buf); 9185 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9186 ieee80211_report_disconnect(sdata, frame_buf, 9187 sizeof(frame_buf), true, 9188 req->reason_code, false); 9189 drv_mgd_complete_tx(sdata->local, sdata, &info); 9190 return 0; 9191 } 9192 9193 if (ifmgd->associated && 9194 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9195 sdata_info(sdata, 9196 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9197 req->bssid, req->reason_code, 9198 ieee80211_get_reason_code_string(req->reason_code)); 9199 9200 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9201 req->reason_code, tx, frame_buf); 9202 ieee80211_report_disconnect(sdata, frame_buf, 9203 sizeof(frame_buf), true, 9204 req->reason_code, false); 9205 drv_mgd_complete_tx(sdata->local, sdata, &info); 9206 return 0; 9207 } 9208 9209 return -ENOTCONN; 9210 } 9211 9212 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9213 struct cfg80211_disassoc_request *req) 9214 { 9215 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9216 9217 if (!sdata->u.mgd.associated || 9218 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9219 return -ENOTCONN; 9220 9221 sdata_info(sdata, 9222 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9223 req->ap_addr, req->reason_code, 9224 ieee80211_get_reason_code_string(req->reason_code)); 9225 9226 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9227 req->reason_code, !req->local_state_change, 9228 frame_buf); 9229 9230 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9231 req->reason_code, false); 9232 9233 return 0; 9234 } 9235 9236 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9237 { 9238 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9239 &link->u.mgd.request_smps_work); 9240 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9241 &link->u.mgd.recalc_smps); 9242 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9243 &link->u.mgd.csa.switch_work); 9244 } 9245 9246 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9247 { 9248 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9249 9250 /* 9251 * Make sure some work items will not run after this, 9252 * they will not do anything but might not have been 9253 * cancelled when disconnecting. 9254 */ 9255 wiphy_work_cancel(sdata->local->hw.wiphy, 9256 &ifmgd->monitor_work); 9257 wiphy_work_cancel(sdata->local->hw.wiphy, 9258 &ifmgd->beacon_connection_loss_work); 9259 wiphy_work_cancel(sdata->local->hw.wiphy, 9260 &ifmgd->csa_connection_drop_work); 9261 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9262 &ifmgd->tdls_peer_del_work); 9263 9264 if (ifmgd->assoc_data) 9265 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9266 if (ifmgd->auth_data) 9267 ieee80211_destroy_auth_data(sdata, false); 9268 spin_lock_bh(&ifmgd->teardown_lock); 9269 if (ifmgd->teardown_skb) { 9270 kfree_skb(ifmgd->teardown_skb); 9271 ifmgd->teardown_skb = NULL; 9272 ifmgd->orig_teardown_skb = NULL; 9273 } 9274 kfree(ifmgd->assoc_req_ies); 9275 ifmgd->assoc_req_ies = NULL; 9276 ifmgd->assoc_req_ies_len = 0; 9277 spin_unlock_bh(&ifmgd->teardown_lock); 9278 del_timer_sync(&ifmgd->timer); 9279 } 9280 9281 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9282 enum nl80211_cqm_rssi_threshold_event rssi_event, 9283 s32 rssi_level, 9284 gfp_t gfp) 9285 { 9286 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9287 9288 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9289 9290 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9291 } 9292 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9293 9294 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9295 { 9296 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9297 9298 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9299 9300 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9301 } 9302 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9303 9304 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9305 int rssi_min_thold, 9306 int rssi_max_thold) 9307 { 9308 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9309 9310 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9311 return; 9312 9313 /* 9314 * Scale up threshold values before storing it, as the RSSI averaging 9315 * algorithm uses a scaled up value as well. Change this scaling 9316 * factor if the RSSI averaging algorithm changes. 9317 */ 9318 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9319 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9320 } 9321 9322 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9323 int rssi_min_thold, 9324 int rssi_max_thold) 9325 { 9326 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9327 9328 WARN_ON(rssi_min_thold == rssi_max_thold || 9329 rssi_min_thold > rssi_max_thold); 9330 9331 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9332 rssi_max_thold); 9333 } 9334 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9335 9336 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9337 { 9338 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9339 9340 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9341 } 9342 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9343