1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2024 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <linux/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #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_link_data *link = 3035 container_of(work, struct ieee80211_link_data, 3036 dfs_cac_timer_work.work); 3037 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 3038 struct ieee80211_sub_if_data *sdata = link->sdata; 3039 3040 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3041 3042 if (sdata->wdev.links[link->link_id].cac_started) { 3043 ieee80211_link_release_channel(link); 3044 cfg80211_cac_event(sdata->dev, &chandef, 3045 NL80211_RADAR_CAC_FINISHED, 3046 GFP_KERNEL, link->link_id); 3047 } 3048 } 3049 3050 static bool 3051 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3052 { 3053 struct ieee80211_local *local = sdata->local; 3054 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3055 bool ret = false; 3056 int ac; 3057 3058 if (local->hw.queues < IEEE80211_NUM_ACS) 3059 return false; 3060 3061 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3062 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 3063 int non_acm_ac; 3064 unsigned long now = jiffies; 3065 3066 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 3067 tx_tspec->admitted_time && 3068 time_after(now, tx_tspec->time_slice_start + HZ)) { 3069 tx_tspec->consumed_tx_time = 0; 3070 tx_tspec->time_slice_start = now; 3071 3072 if (tx_tspec->downgraded) 3073 tx_tspec->action = 3074 TX_TSPEC_ACTION_STOP_DOWNGRADE; 3075 } 3076 3077 switch (tx_tspec->action) { 3078 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 3079 /* take the original parameters */ 3080 if (drv_conf_tx(local, &sdata->deflink, ac, 3081 &sdata->deflink.tx_conf[ac])) 3082 link_err(&sdata->deflink, 3083 "failed to set TX queue parameters for queue %d\n", 3084 ac); 3085 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3086 tx_tspec->downgraded = false; 3087 ret = true; 3088 break; 3089 case TX_TSPEC_ACTION_DOWNGRADE: 3090 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3091 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3092 ret = true; 3093 break; 3094 } 3095 /* downgrade next lower non-ACM AC */ 3096 for (non_acm_ac = ac + 1; 3097 non_acm_ac < IEEE80211_NUM_ACS; 3098 non_acm_ac++) 3099 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 3100 break; 3101 /* Usually the loop will result in using BK even if it 3102 * requires admission control, but such a configuration 3103 * makes no sense and we have to transmit somehow - the 3104 * AC selection does the same thing. 3105 * If we started out trying to downgrade from BK, then 3106 * the extra condition here might be needed. 3107 */ 3108 if (non_acm_ac >= IEEE80211_NUM_ACS) 3109 non_acm_ac = IEEE80211_AC_BK; 3110 if (drv_conf_tx(local, &sdata->deflink, ac, 3111 &sdata->deflink.tx_conf[non_acm_ac])) 3112 link_err(&sdata->deflink, 3113 "failed to set TX queue parameters for queue %d\n", 3114 ac); 3115 tx_tspec->action = TX_TSPEC_ACTION_NONE; 3116 ret = true; 3117 wiphy_delayed_work_queue(local->hw.wiphy, 3118 &ifmgd->tx_tspec_wk, 3119 tx_tspec->time_slice_start + 3120 HZ - now + 1); 3121 break; 3122 case TX_TSPEC_ACTION_NONE: 3123 /* nothing now */ 3124 break; 3125 } 3126 } 3127 3128 return ret; 3129 } 3130 3131 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 3132 { 3133 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 3134 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3135 BSS_CHANGED_QOS); 3136 } 3137 3138 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 3139 struct wiphy_work *work) 3140 { 3141 struct ieee80211_sub_if_data *sdata; 3142 3143 sdata = container_of(work, struct ieee80211_sub_if_data, 3144 u.mgd.tx_tspec_wk.work); 3145 ieee80211_sta_handle_tspec_ac_params(sdata); 3146 } 3147 3148 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 3149 { 3150 struct ieee80211_sub_if_data *sdata = link->sdata; 3151 struct ieee80211_local *local = sdata->local; 3152 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3153 struct ieee80211_tx_queue_params *params = link->tx_conf; 3154 u8 ac; 3155 3156 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3157 mlme_dbg(sdata, 3158 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 3159 ac, params[ac].acm, 3160 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 3161 params[ac].txop, params[ac].uapsd, 3162 ifmgd->tx_tspec[ac].downgraded); 3163 if (!ifmgd->tx_tspec[ac].downgraded && 3164 drv_conf_tx(local, link, ac, ¶ms[ac])) 3165 link_err(link, 3166 "failed to set TX queue parameters for AC %d\n", 3167 ac); 3168 } 3169 } 3170 3171 /* MLME */ 3172 static bool 3173 ieee80211_sta_wmm_params(struct ieee80211_local *local, 3174 struct ieee80211_link_data *link, 3175 const u8 *wmm_param, size_t wmm_param_len, 3176 const struct ieee80211_mu_edca_param_set *mu_edca) 3177 { 3178 struct ieee80211_sub_if_data *sdata = link->sdata; 3179 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 3180 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3181 size_t left; 3182 int count, mu_edca_count, ac; 3183 const u8 *pos; 3184 u8 uapsd_queues = 0; 3185 3186 if (!local->ops->conf_tx) 3187 return false; 3188 3189 if (local->hw.queues < IEEE80211_NUM_ACS) 3190 return false; 3191 3192 if (!wmm_param) 3193 return false; 3194 3195 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 3196 return false; 3197 3198 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 3199 uapsd_queues = ifmgd->uapsd_queues; 3200 3201 count = wmm_param[6] & 0x0f; 3202 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 3203 * if mu_edca was preset before and now it disappeared tell 3204 * the driver about it. 3205 */ 3206 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 3207 if (count == link->u.mgd.wmm_last_param_set && 3208 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 3209 return false; 3210 link->u.mgd.wmm_last_param_set = count; 3211 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 3212 3213 pos = wmm_param + 8; 3214 left = wmm_param_len - 8; 3215 3216 memset(¶ms, 0, sizeof(params)); 3217 3218 sdata->wmm_acm = 0; 3219 for (; left >= 4; left -= 4, pos += 4) { 3220 int aci = (pos[0] >> 5) & 0x03; 3221 int acm = (pos[0] >> 4) & 0x01; 3222 bool uapsd = false; 3223 3224 switch (aci) { 3225 case 1: /* AC_BK */ 3226 ac = IEEE80211_AC_BK; 3227 if (acm) 3228 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 3229 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 3230 uapsd = true; 3231 params[ac].mu_edca = !!mu_edca; 3232 if (mu_edca) 3233 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 3234 break; 3235 case 2: /* AC_VI */ 3236 ac = IEEE80211_AC_VI; 3237 if (acm) 3238 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 3239 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 3240 uapsd = true; 3241 params[ac].mu_edca = !!mu_edca; 3242 if (mu_edca) 3243 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 3244 break; 3245 case 3: /* AC_VO */ 3246 ac = IEEE80211_AC_VO; 3247 if (acm) 3248 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 3249 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 3250 uapsd = true; 3251 params[ac].mu_edca = !!mu_edca; 3252 if (mu_edca) 3253 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 3254 break; 3255 case 0: /* AC_BE */ 3256 default: 3257 ac = IEEE80211_AC_BE; 3258 if (acm) 3259 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 3260 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 3261 uapsd = true; 3262 params[ac].mu_edca = !!mu_edca; 3263 if (mu_edca) 3264 params[ac].mu_edca_param_rec = mu_edca->ac_be; 3265 break; 3266 } 3267 3268 params[ac].aifs = pos[0] & 0x0f; 3269 3270 if (params[ac].aifs < 2) { 3271 link_info(link, 3272 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 3273 params[ac].aifs, aci); 3274 params[ac].aifs = 2; 3275 } 3276 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 3277 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 3278 params[ac].txop = get_unaligned_le16(pos + 2); 3279 params[ac].acm = acm; 3280 params[ac].uapsd = uapsd; 3281 3282 if (params[ac].cw_min == 0 || 3283 params[ac].cw_min > params[ac].cw_max) { 3284 link_info(link, 3285 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 3286 params[ac].cw_min, params[ac].cw_max, aci); 3287 return false; 3288 } 3289 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 3290 } 3291 3292 /* WMM specification requires all 4 ACIs. */ 3293 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 3294 if (params[ac].cw_min == 0) { 3295 link_info(link, 3296 "AP has invalid WMM params (missing AC %d), using defaults\n", 3297 ac); 3298 return false; 3299 } 3300 } 3301 3302 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 3303 link->tx_conf[ac] = params[ac]; 3304 3305 ieee80211_mgd_set_link_qos_params(link); 3306 3307 /* enable WMM or activate new settings */ 3308 link->conf->qos = true; 3309 return true; 3310 } 3311 3312 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3313 { 3314 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3315 3316 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 3317 ieee80211_run_deferred_scan(sdata->local); 3318 } 3319 3320 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 3321 { 3322 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3323 3324 __ieee80211_stop_poll(sdata); 3325 } 3326 3327 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 3328 u16 capab, bool erp_valid, u8 erp) 3329 { 3330 struct ieee80211_bss_conf *bss_conf = link->conf; 3331 struct ieee80211_supported_band *sband; 3332 u64 changed = 0; 3333 bool use_protection; 3334 bool use_short_preamble; 3335 bool use_short_slot; 3336 3337 sband = ieee80211_get_link_sband(link); 3338 if (!sband) 3339 return changed; 3340 3341 if (erp_valid) { 3342 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 3343 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 3344 } else { 3345 use_protection = false; 3346 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 3347 } 3348 3349 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 3350 if (sband->band == NL80211_BAND_5GHZ || 3351 sband->band == NL80211_BAND_6GHZ) 3352 use_short_slot = true; 3353 3354 if (use_protection != bss_conf->use_cts_prot) { 3355 bss_conf->use_cts_prot = use_protection; 3356 changed |= BSS_CHANGED_ERP_CTS_PROT; 3357 } 3358 3359 if (use_short_preamble != bss_conf->use_short_preamble) { 3360 bss_conf->use_short_preamble = use_short_preamble; 3361 changed |= BSS_CHANGED_ERP_PREAMBLE; 3362 } 3363 3364 if (use_short_slot != bss_conf->use_short_slot) { 3365 bss_conf->use_short_slot = use_short_slot; 3366 changed |= BSS_CHANGED_ERP_SLOT; 3367 } 3368 3369 return changed; 3370 } 3371 3372 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 3373 struct cfg80211_bss *cbss) 3374 { 3375 struct ieee80211_sub_if_data *sdata = link->sdata; 3376 struct ieee80211_bss_conf *bss_conf = link->conf; 3377 struct ieee80211_bss *bss = (void *)cbss->priv; 3378 u64 changed = BSS_CHANGED_QOS; 3379 3380 /* not really used in MLO */ 3381 sdata->u.mgd.beacon_timeout = 3382 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 3383 bss_conf->beacon_int)); 3384 3385 changed |= ieee80211_handle_bss_capability(link, 3386 bss_conf->assoc_capability, 3387 bss->has_erp_value, 3388 bss->erp_value); 3389 3390 ieee80211_check_rate_mask(link); 3391 3392 link->conf->bss = cbss; 3393 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 3394 3395 if (sdata->vif.p2p || 3396 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 3397 const struct cfg80211_bss_ies *ies; 3398 3399 rcu_read_lock(); 3400 ies = rcu_dereference(cbss->ies); 3401 if (ies) { 3402 int ret; 3403 3404 ret = cfg80211_get_p2p_attr( 3405 ies->data, ies->len, 3406 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 3407 (u8 *) &bss_conf->p2p_noa_attr, 3408 sizeof(bss_conf->p2p_noa_attr)); 3409 if (ret >= 2) { 3410 link->u.mgd.p2p_noa_index = 3411 bss_conf->p2p_noa_attr.index; 3412 changed |= BSS_CHANGED_P2P_PS; 3413 } 3414 } 3415 rcu_read_unlock(); 3416 } 3417 3418 if (link->u.mgd.have_beacon) { 3419 bss_conf->beacon_rate = bss->beacon_rate; 3420 changed |= BSS_CHANGED_BEACON_INFO; 3421 } else { 3422 bss_conf->beacon_rate = NULL; 3423 } 3424 3425 /* Tell the driver to monitor connection quality (if supported) */ 3426 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 3427 bss_conf->cqm_rssi_thold) 3428 changed |= BSS_CHANGED_CQM; 3429 3430 return changed; 3431 } 3432 3433 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3434 struct ieee80211_mgd_assoc_data *assoc_data, 3435 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3436 { 3437 struct ieee80211_local *local = sdata->local; 3438 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3439 u64 vif_changed = BSS_CHANGED_ASSOC; 3440 unsigned int link_id; 3441 3442 lockdep_assert_wiphy(local->hw.wiphy); 3443 3444 sdata->u.mgd.associated = true; 3445 3446 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3447 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3448 struct ieee80211_link_data *link; 3449 3450 if (!cbss || 3451 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3452 continue; 3453 3454 if (ieee80211_vif_is_mld(&sdata->vif) && 3455 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3456 continue; 3457 3458 link = sdata_dereference(sdata->link[link_id], sdata); 3459 if (WARN_ON(!link)) 3460 return; 3461 3462 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3463 } 3464 3465 /* just to be sure */ 3466 ieee80211_stop_poll(sdata); 3467 3468 ieee80211_led_assoc(local, 1); 3469 3470 vif_cfg->assoc = 1; 3471 3472 /* Enable ARP filtering */ 3473 if (vif_cfg->arp_addr_cnt) 3474 vif_changed |= BSS_CHANGED_ARP_FILTER; 3475 3476 if (ieee80211_vif_is_mld(&sdata->vif)) { 3477 for (link_id = 0; 3478 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3479 link_id++) { 3480 struct ieee80211_link_data *link; 3481 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3482 3483 if (!cbss || 3484 !(BIT(link_id) & 3485 ieee80211_vif_usable_links(&sdata->vif)) || 3486 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3487 continue; 3488 3489 link = sdata_dereference(sdata->link[link_id], sdata); 3490 if (WARN_ON(!link)) 3491 return; 3492 3493 ieee80211_link_info_change_notify(sdata, link, 3494 changed[link_id]); 3495 3496 ieee80211_recalc_smps(sdata, link); 3497 } 3498 3499 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3500 } else { 3501 ieee80211_bss_info_change_notify(sdata, 3502 vif_changed | changed[0]); 3503 } 3504 3505 ieee80211_recalc_ps(local); 3506 3507 /* leave this here to not change ordering in non-MLO cases */ 3508 if (!ieee80211_vif_is_mld(&sdata->vif)) 3509 ieee80211_recalc_smps(sdata, &sdata->deflink); 3510 ieee80211_recalc_ps_vif(sdata); 3511 3512 netif_carrier_on(sdata->dev); 3513 } 3514 3515 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3516 u16 stype, u16 reason, bool tx, 3517 u8 *frame_buf) 3518 { 3519 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3520 struct ieee80211_local *local = sdata->local; 3521 unsigned int link_id; 3522 u64 changed = 0; 3523 struct ieee80211_prep_tx_info info = { 3524 .subtype = stype, 3525 .was_assoc = true, 3526 .link_id = ffs(sdata->vif.active_links) - 1, 3527 }; 3528 3529 lockdep_assert_wiphy(local->hw.wiphy); 3530 3531 if (WARN_ON_ONCE(tx && !frame_buf)) 3532 return; 3533 3534 if (WARN_ON(!ifmgd->associated)) 3535 return; 3536 3537 ieee80211_stop_poll(sdata); 3538 3539 ifmgd->associated = false; 3540 3541 /* other links will be destroyed */ 3542 sdata->deflink.conf->bss = NULL; 3543 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3544 3545 netif_carrier_off(sdata->dev); 3546 3547 /* 3548 * if we want to get out of ps before disassoc (why?) we have 3549 * to do it before sending disassoc, as otherwise the null-packet 3550 * won't be valid. 3551 */ 3552 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3553 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3554 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3555 } 3556 local->ps_sdata = NULL; 3557 3558 /* disable per-vif ps */ 3559 ieee80211_recalc_ps_vif(sdata); 3560 3561 /* make sure ongoing transmission finishes */ 3562 synchronize_net(); 3563 3564 /* 3565 * drop any frame before deauth/disassoc, this can be data or 3566 * management frame. Since we are disconnecting, we should not 3567 * insist sending these frames which can take time and delay 3568 * the disconnection and possible the roaming. 3569 */ 3570 if (tx) 3571 ieee80211_flush_queues(local, sdata, true); 3572 3573 /* deauthenticate/disassociate now */ 3574 if (tx || frame_buf) { 3575 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3576 3577 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3578 sdata->vif.cfg.ap_addr, stype, 3579 reason, tx, frame_buf); 3580 } 3581 3582 /* flush out frame - make sure the deauth was actually sent */ 3583 if (tx) 3584 ieee80211_flush_queues(local, sdata, false); 3585 3586 drv_mgd_complete_tx(sdata->local, sdata, &info); 3587 3588 /* clear AP addr only after building the needed mgmt frames */ 3589 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3590 eth_zero_addr(sdata->vif.cfg.ap_addr); 3591 3592 sdata->vif.cfg.ssid_len = 0; 3593 3594 /* remove AP and TDLS peers */ 3595 sta_info_flush(sdata, -1); 3596 3597 /* finally reset all BSS / config parameters */ 3598 if (!ieee80211_vif_is_mld(&sdata->vif)) 3599 changed |= ieee80211_reset_erp_info(sdata); 3600 3601 ieee80211_led_assoc(local, 0); 3602 changed |= BSS_CHANGED_ASSOC; 3603 sdata->vif.cfg.assoc = false; 3604 3605 sdata->deflink.u.mgd.p2p_noa_index = -1; 3606 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3607 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3608 3609 /* on the next assoc, re-program HT/VHT parameters */ 3610 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3611 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3612 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3613 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3614 3615 /* 3616 * reset MU-MIMO ownership and group data in default link, 3617 * if used, other links are destroyed 3618 */ 3619 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3620 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3621 memset(sdata->vif.bss_conf.mu_group.position, 0, 3622 sizeof(sdata->vif.bss_conf.mu_group.position)); 3623 if (!ieee80211_vif_is_mld(&sdata->vif)) 3624 changed |= BSS_CHANGED_MU_GROUPS; 3625 sdata->vif.bss_conf.mu_mimo_owner = false; 3626 3627 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3628 3629 del_timer_sync(&local->dynamic_ps_timer); 3630 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3631 3632 /* Disable ARP filtering */ 3633 if (sdata->vif.cfg.arp_addr_cnt) 3634 changed |= BSS_CHANGED_ARP_FILTER; 3635 3636 sdata->vif.bss_conf.qos = false; 3637 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3638 changed |= BSS_CHANGED_QOS; 3639 /* The BSSID (not really interesting) and HT changed */ 3640 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3641 ieee80211_bss_info_change_notify(sdata, changed); 3642 } else { 3643 ieee80211_vif_cfg_change_notify(sdata, changed); 3644 } 3645 3646 /* disassociated - set to defaults now */ 3647 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3648 3649 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3650 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3651 del_timer_sync(&sdata->u.mgd.timer); 3652 3653 sdata->vif.bss_conf.dtim_period = 0; 3654 sdata->vif.bss_conf.beacon_rate = NULL; 3655 3656 sdata->deflink.u.mgd.have_beacon = false; 3657 sdata->deflink.u.mgd.tracking_signal_avg = false; 3658 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3659 3660 ifmgd->flags = 0; 3661 3662 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3663 struct ieee80211_link_data *link; 3664 3665 link = sdata_dereference(sdata->link[link_id], sdata); 3666 if (!link) 3667 continue; 3668 ieee80211_link_release_channel(link); 3669 } 3670 3671 sdata->vif.bss_conf.csa_active = false; 3672 sdata->deflink.u.mgd.csa.blocked_tx = false; 3673 sdata->deflink.u.mgd.csa.waiting_bcn = false; 3674 sdata->deflink.u.mgd.csa.ignored_same_chan = false; 3675 ieee80211_vif_unblock_queues_csa(sdata); 3676 3677 /* existing TX TSPEC sessions no longer exist */ 3678 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3679 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3680 3681 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3682 sdata->vif.bss_conf.pwr_reduction = 0; 3683 ieee80211_clear_tpe(&sdata->vif.bss_conf.tpe); 3684 3685 sdata->vif.cfg.eml_cap = 0; 3686 sdata->vif.cfg.eml_med_sync_delay = 0; 3687 sdata->vif.cfg.mld_capa_op = 0; 3688 3689 memset(&sdata->u.mgd.ttlm_info, 0, 3690 sizeof(sdata->u.mgd.ttlm_info)); 3691 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3692 3693 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 3694 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3695 &ifmgd->neg_ttlm_timeout_work); 3696 3697 sdata->u.mgd.removed_links = 0; 3698 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3699 &sdata->u.mgd.ml_reconf_work); 3700 3701 wiphy_work_cancel(sdata->local->hw.wiphy, 3702 &ifmgd->teardown_ttlm_work); 3703 3704 ieee80211_vif_set_links(sdata, 0, 0); 3705 3706 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3707 } 3708 3709 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3710 { 3711 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3712 struct ieee80211_local *local = sdata->local; 3713 3714 lockdep_assert_wiphy(local->hw.wiphy); 3715 3716 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3717 return; 3718 3719 __ieee80211_stop_poll(sdata); 3720 3721 ieee80211_recalc_ps(local); 3722 3723 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3724 return; 3725 3726 /* 3727 * We've received a probe response, but are not sure whether 3728 * we have or will be receiving any beacons or data, so let's 3729 * schedule the timers again, just in case. 3730 */ 3731 ieee80211_sta_reset_beacon_monitor(sdata); 3732 3733 mod_timer(&ifmgd->conn_mon_timer, 3734 round_jiffies_up(jiffies + 3735 IEEE80211_CONNECTION_IDLE_TIME)); 3736 } 3737 3738 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3739 struct ieee80211_hdr *hdr, 3740 u16 tx_time) 3741 { 3742 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3743 u16 tid; 3744 int ac; 3745 struct ieee80211_sta_tx_tspec *tx_tspec; 3746 unsigned long now = jiffies; 3747 3748 if (!ieee80211_is_data_qos(hdr->frame_control)) 3749 return; 3750 3751 tid = ieee80211_get_tid(hdr); 3752 ac = ieee80211_ac_from_tid(tid); 3753 tx_tspec = &ifmgd->tx_tspec[ac]; 3754 3755 if (likely(!tx_tspec->admitted_time)) 3756 return; 3757 3758 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3759 tx_tspec->consumed_tx_time = 0; 3760 tx_tspec->time_slice_start = now; 3761 3762 if (tx_tspec->downgraded) { 3763 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3764 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3765 &ifmgd->tx_tspec_wk, 0); 3766 } 3767 } 3768 3769 if (tx_tspec->downgraded) 3770 return; 3771 3772 tx_tspec->consumed_tx_time += tx_time; 3773 3774 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3775 tx_tspec->downgraded = true; 3776 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3777 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3778 &ifmgd->tx_tspec_wk, 0); 3779 } 3780 } 3781 3782 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3783 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3784 { 3785 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3786 3787 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3788 !sdata->u.mgd.probe_send_count) 3789 return; 3790 3791 if (ack) 3792 sdata->u.mgd.probe_send_count = 0; 3793 else 3794 sdata->u.mgd.nullfunc_failed = true; 3795 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3796 } 3797 3798 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3799 const u8 *src, const u8 *dst, 3800 const u8 *ssid, size_t ssid_len, 3801 struct ieee80211_channel *channel) 3802 { 3803 struct sk_buff *skb; 3804 3805 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3806 ssid, ssid_len, NULL, 0, 3807 IEEE80211_PROBE_FLAG_DIRECTED); 3808 if (skb) 3809 ieee80211_tx_skb(sdata, skb); 3810 } 3811 3812 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3813 { 3814 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3815 u8 *dst = sdata->vif.cfg.ap_addr; 3816 u8 unicast_limit = max(1, max_probe_tries - 3); 3817 struct sta_info *sta; 3818 3819 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3820 3821 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3822 return; 3823 3824 /* 3825 * Try sending broadcast probe requests for the last three 3826 * probe requests after the first ones failed since some 3827 * buggy APs only support broadcast probe requests. 3828 */ 3829 if (ifmgd->probe_send_count >= unicast_limit) 3830 dst = NULL; 3831 3832 /* 3833 * When the hardware reports an accurate Tx ACK status, it's 3834 * better to send a nullfunc frame instead of a probe request, 3835 * as it will kick us off the AP quickly if we aren't associated 3836 * anymore. The timeout will be reset if the frame is ACKed by 3837 * the AP. 3838 */ 3839 ifmgd->probe_send_count++; 3840 3841 if (dst) { 3842 sta = sta_info_get(sdata, dst); 3843 if (!WARN_ON(!sta)) 3844 ieee80211_check_fast_rx(sta); 3845 } 3846 3847 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3848 ifmgd->nullfunc_failed = false; 3849 ieee80211_send_nullfunc(sdata->local, sdata, false); 3850 } else { 3851 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3852 sdata->vif.cfg.ssid, 3853 sdata->vif.cfg.ssid_len, 3854 sdata->deflink.conf->bss->channel); 3855 } 3856 3857 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3858 run_again(sdata, ifmgd->probe_timeout); 3859 } 3860 3861 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3862 bool beacon) 3863 { 3864 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3865 bool already = false; 3866 3867 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3868 3869 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3870 return; 3871 3872 if (!ieee80211_sdata_running(sdata)) 3873 return; 3874 3875 if (!ifmgd->associated) 3876 return; 3877 3878 if (sdata->local->tmp_channel || sdata->local->scanning) 3879 return; 3880 3881 if (sdata->local->suspending) { 3882 /* reschedule after resume */ 3883 ieee80211_reset_ap_probe(sdata); 3884 return; 3885 } 3886 3887 if (beacon) { 3888 mlme_dbg_ratelimited(sdata, 3889 "detected beacon loss from AP (missed %d beacons) - probing\n", 3890 beacon_loss_count); 3891 3892 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3893 } 3894 3895 /* 3896 * The driver/our work has already reported this event or the 3897 * connection monitoring has kicked in and we have already sent 3898 * a probe request. Or maybe the AP died and the driver keeps 3899 * reporting until we disassociate... 3900 * 3901 * In either case we have to ignore the current call to this 3902 * function (except for setting the correct probe reason bit) 3903 * because otherwise we would reset the timer every time and 3904 * never check whether we received a probe response! 3905 */ 3906 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3907 already = true; 3908 3909 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3910 3911 if (already) 3912 return; 3913 3914 ieee80211_recalc_ps(sdata->local); 3915 3916 ifmgd->probe_send_count = 0; 3917 ieee80211_mgd_probe_ap_send(sdata); 3918 } 3919 3920 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3921 struct ieee80211_vif *vif) 3922 { 3923 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3924 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3925 struct cfg80211_bss *cbss; 3926 struct sk_buff *skb; 3927 const struct element *ssid; 3928 int ssid_len; 3929 3930 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3931 3932 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3933 ieee80211_vif_is_mld(&sdata->vif))) 3934 return NULL; 3935 3936 if (ifmgd->associated) 3937 cbss = sdata->deflink.conf->bss; 3938 else if (ifmgd->auth_data) 3939 cbss = ifmgd->auth_data->bss; 3940 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3941 cbss = ifmgd->assoc_data->link[0].bss; 3942 else 3943 return NULL; 3944 3945 rcu_read_lock(); 3946 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3947 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3948 "invalid SSID element (len=%d)", 3949 ssid ? ssid->datalen : -1)) 3950 ssid_len = 0; 3951 else 3952 ssid_len = ssid->datalen; 3953 3954 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3955 (u32) -1, cbss->channel, 3956 ssid->data, ssid_len, 3957 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3958 rcu_read_unlock(); 3959 3960 return skb; 3961 } 3962 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3963 3964 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3965 const u8 *buf, size_t len, bool tx, 3966 u16 reason, bool reconnect) 3967 { 3968 struct ieee80211_event event = { 3969 .type = MLME_EVENT, 3970 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3971 .u.mlme.reason = reason, 3972 }; 3973 3974 if (tx) 3975 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3976 else 3977 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3978 3979 drv_event_callback(sdata->local, sdata, &event); 3980 } 3981 3982 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3983 { 3984 struct ieee80211_local *local = sdata->local; 3985 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3986 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3987 bool tx = false; 3988 3989 lockdep_assert_wiphy(local->hw.wiphy); 3990 3991 if (!ifmgd->associated) 3992 return; 3993 3994 /* only transmit if we have a link that makes that worthwhile */ 3995 for (unsigned int link_id = 0; 3996 link_id < ARRAY_SIZE(sdata->link); 3997 link_id++) { 3998 struct ieee80211_link_data *link; 3999 4000 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 4001 continue; 4002 4003 link = sdata_dereference(sdata->link[link_id], sdata); 4004 if (WARN_ON_ONCE(!link)) 4005 continue; 4006 4007 if (link->u.mgd.csa.blocked_tx) 4008 continue; 4009 4010 tx = true; 4011 break; 4012 } 4013 4014 if (!ifmgd->driver_disconnect) { 4015 unsigned int link_id; 4016 4017 /* 4018 * AP is probably out of range (or not reachable for another 4019 * reason) so remove the bss structs for that AP. In the case 4020 * of multi-link, it's not clear that all of them really are 4021 * out of range, but if they weren't the driver likely would 4022 * have switched to just have a single link active? 4023 */ 4024 for (link_id = 0; 4025 link_id < ARRAY_SIZE(sdata->link); 4026 link_id++) { 4027 struct ieee80211_link_data *link; 4028 4029 link = sdata_dereference(sdata->link[link_id], sdata); 4030 if (!link) 4031 continue; 4032 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 4033 link->conf->bss = NULL; 4034 } 4035 } 4036 4037 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 4038 ifmgd->driver_disconnect ? 4039 WLAN_REASON_DEAUTH_LEAVING : 4040 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4041 tx, frame_buf); 4042 /* the other links will be destroyed */ 4043 sdata->vif.bss_conf.csa_active = false; 4044 sdata->deflink.u.mgd.csa.waiting_bcn = false; 4045 sdata->deflink.u.mgd.csa.blocked_tx = false; 4046 ieee80211_vif_unblock_queues_csa(sdata); 4047 4048 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 4049 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 4050 ifmgd->reconnect); 4051 ifmgd->reconnect = false; 4052 } 4053 4054 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 4055 struct wiphy_work *work) 4056 { 4057 struct ieee80211_sub_if_data *sdata = 4058 container_of(work, struct ieee80211_sub_if_data, 4059 u.mgd.beacon_connection_loss_work); 4060 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4061 4062 if (ifmgd->connection_loss) { 4063 sdata_info(sdata, "Connection to AP %pM lost\n", 4064 sdata->vif.cfg.ap_addr); 4065 __ieee80211_disconnect(sdata); 4066 ifmgd->connection_loss = false; 4067 } else if (ifmgd->driver_disconnect) { 4068 sdata_info(sdata, 4069 "Driver requested disconnection from AP %pM\n", 4070 sdata->vif.cfg.ap_addr); 4071 __ieee80211_disconnect(sdata); 4072 ifmgd->driver_disconnect = false; 4073 } else { 4074 if (ifmgd->associated) 4075 sdata->deflink.u.mgd.beacon_loss_count++; 4076 ieee80211_mgd_probe_ap(sdata, true); 4077 } 4078 } 4079 4080 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 4081 struct wiphy_work *work) 4082 { 4083 struct ieee80211_sub_if_data *sdata = 4084 container_of(work, struct ieee80211_sub_if_data, 4085 u.mgd.csa_connection_drop_work); 4086 4087 __ieee80211_disconnect(sdata); 4088 } 4089 4090 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 4091 { 4092 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4093 struct ieee80211_hw *hw = &sdata->local->hw; 4094 4095 trace_api_beacon_loss(sdata); 4096 4097 sdata->u.mgd.connection_loss = false; 4098 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4099 } 4100 EXPORT_SYMBOL(ieee80211_beacon_loss); 4101 4102 void ieee80211_connection_loss(struct ieee80211_vif *vif) 4103 { 4104 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4105 struct ieee80211_hw *hw = &sdata->local->hw; 4106 4107 trace_api_connection_loss(sdata); 4108 4109 sdata->u.mgd.connection_loss = true; 4110 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4111 } 4112 EXPORT_SYMBOL(ieee80211_connection_loss); 4113 4114 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 4115 { 4116 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 4117 struct ieee80211_hw *hw = &sdata->local->hw; 4118 4119 trace_api_disconnect(sdata, reconnect); 4120 4121 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 4122 return; 4123 4124 sdata->u.mgd.driver_disconnect = true; 4125 sdata->u.mgd.reconnect = reconnect; 4126 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 4127 } 4128 EXPORT_SYMBOL(ieee80211_disconnect); 4129 4130 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 4131 bool assoc) 4132 { 4133 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4134 4135 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4136 4137 if (!assoc) { 4138 /* 4139 * we are not authenticated yet, the only timer that could be 4140 * running is the timeout for the authentication response which 4141 * which is not relevant anymore. 4142 */ 4143 del_timer_sync(&sdata->u.mgd.timer); 4144 sta_info_destroy_addr(sdata, auth_data->ap_addr); 4145 4146 /* other links are destroyed */ 4147 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4148 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4149 BSS_CHANGED_BSSID); 4150 sdata->u.mgd.flags = 0; 4151 4152 ieee80211_link_release_channel(&sdata->deflink); 4153 ieee80211_vif_set_links(sdata, 0, 0); 4154 } 4155 4156 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 4157 kfree(auth_data); 4158 sdata->u.mgd.auth_data = NULL; 4159 } 4160 4161 enum assoc_status { 4162 ASSOC_SUCCESS, 4163 ASSOC_REJECTED, 4164 ASSOC_TIMEOUT, 4165 ASSOC_ABANDON, 4166 }; 4167 4168 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 4169 enum assoc_status status) 4170 { 4171 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4172 4173 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4174 4175 if (status != ASSOC_SUCCESS) { 4176 /* 4177 * we are not associated yet, the only timer that could be 4178 * running is the timeout for the association response which 4179 * which is not relevant anymore. 4180 */ 4181 del_timer_sync(&sdata->u.mgd.timer); 4182 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 4183 4184 eth_zero_addr(sdata->deflink.u.mgd.bssid); 4185 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 4186 BSS_CHANGED_BSSID); 4187 sdata->u.mgd.flags = 0; 4188 sdata->vif.bss_conf.mu_mimo_owner = false; 4189 4190 if (status != ASSOC_REJECTED) { 4191 struct cfg80211_assoc_failure data = { 4192 .timeout = status == ASSOC_TIMEOUT, 4193 }; 4194 int i; 4195 4196 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 4197 ARRAY_SIZE(assoc_data->link)); 4198 4199 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 4200 data.bss[i] = assoc_data->link[i].bss; 4201 4202 if (ieee80211_vif_is_mld(&sdata->vif)) 4203 data.ap_mld_addr = assoc_data->ap_addr; 4204 4205 cfg80211_assoc_failure(sdata->dev, &data); 4206 } 4207 4208 ieee80211_link_release_channel(&sdata->deflink); 4209 ieee80211_vif_set_links(sdata, 0, 0); 4210 } 4211 4212 kfree(assoc_data); 4213 sdata->u.mgd.assoc_data = NULL; 4214 } 4215 4216 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 4217 struct ieee80211_mgmt *mgmt, size_t len) 4218 { 4219 struct ieee80211_local *local = sdata->local; 4220 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 4221 const struct element *challenge; 4222 u8 *pos; 4223 u32 tx_flags = 0; 4224 struct ieee80211_prep_tx_info info = { 4225 .subtype = IEEE80211_STYPE_AUTH, 4226 .link_id = auth_data->link_id, 4227 }; 4228 4229 pos = mgmt->u.auth.variable; 4230 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 4231 len - (pos - (u8 *)mgmt)); 4232 if (!challenge) 4233 return; 4234 auth_data->expected_transaction = 4; 4235 drv_mgd_prepare_tx(sdata->local, sdata, &info); 4236 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 4237 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 4238 IEEE80211_TX_INTFL_MLME_CONN_TX; 4239 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 4240 (void *)challenge, 4241 challenge->datalen + sizeof(*challenge), 4242 auth_data->ap_addr, auth_data->ap_addr, 4243 auth_data->key, auth_data->key_len, 4244 auth_data->key_idx, tx_flags); 4245 } 4246 4247 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 4248 { 4249 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4250 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 4251 struct sta_info *sta; 4252 4253 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4254 4255 sdata_info(sdata, "authenticated\n"); 4256 ifmgd->auth_data->done = true; 4257 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 4258 ifmgd->auth_data->timeout_started = true; 4259 run_again(sdata, ifmgd->auth_data->timeout); 4260 4261 /* move station state to auth */ 4262 sta = sta_info_get(sdata, ap_addr); 4263 if (!sta) { 4264 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 4265 return false; 4266 } 4267 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 4268 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 4269 return false; 4270 } 4271 4272 return true; 4273 } 4274 4275 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 4276 struct ieee80211_mgmt *mgmt, size_t len) 4277 { 4278 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4279 u16 auth_alg, auth_transaction, status_code; 4280 struct ieee80211_event event = { 4281 .type = MLME_EVENT, 4282 .u.mlme.data = AUTH_EVENT, 4283 }; 4284 struct ieee80211_prep_tx_info info = { 4285 .subtype = IEEE80211_STYPE_AUTH, 4286 }; 4287 4288 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4289 4290 if (len < 24 + 6) 4291 return; 4292 4293 if (!ifmgd->auth_data || ifmgd->auth_data->done) 4294 return; 4295 4296 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 4297 return; 4298 4299 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 4300 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 4301 status_code = le16_to_cpu(mgmt->u.auth.status_code); 4302 4303 if (auth_alg != ifmgd->auth_data->algorithm || 4304 (auth_alg != WLAN_AUTH_SAE && 4305 auth_transaction != ifmgd->auth_data->expected_transaction) || 4306 (auth_alg == WLAN_AUTH_SAE && 4307 (auth_transaction < ifmgd->auth_data->expected_transaction || 4308 auth_transaction > 2))) { 4309 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 4310 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 4311 auth_transaction, 4312 ifmgd->auth_data->expected_transaction); 4313 goto notify_driver; 4314 } 4315 4316 if (status_code != WLAN_STATUS_SUCCESS) { 4317 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4318 4319 if (auth_alg == WLAN_AUTH_SAE && 4320 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 4321 (auth_transaction == 1 && 4322 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 4323 status_code == WLAN_STATUS_SAE_PK)))) { 4324 /* waiting for userspace now */ 4325 ifmgd->auth_data->waiting = true; 4326 ifmgd->auth_data->timeout = 4327 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 4328 ifmgd->auth_data->timeout_started = true; 4329 run_again(sdata, ifmgd->auth_data->timeout); 4330 goto notify_driver; 4331 } 4332 4333 sdata_info(sdata, "%pM denied authentication (status %d)\n", 4334 mgmt->sa, status_code); 4335 ieee80211_destroy_auth_data(sdata, false); 4336 event.u.mlme.status = MLME_DENIED; 4337 event.u.mlme.reason = status_code; 4338 drv_event_callback(sdata->local, sdata, &event); 4339 goto notify_driver; 4340 } 4341 4342 switch (ifmgd->auth_data->algorithm) { 4343 case WLAN_AUTH_OPEN: 4344 case WLAN_AUTH_LEAP: 4345 case WLAN_AUTH_FT: 4346 case WLAN_AUTH_SAE: 4347 case WLAN_AUTH_FILS_SK: 4348 case WLAN_AUTH_FILS_SK_PFS: 4349 case WLAN_AUTH_FILS_PK: 4350 break; 4351 case WLAN_AUTH_SHARED_KEY: 4352 if (ifmgd->auth_data->expected_transaction != 4) { 4353 ieee80211_auth_challenge(sdata, mgmt, len); 4354 /* need another frame */ 4355 return; 4356 } 4357 break; 4358 default: 4359 WARN_ONCE(1, "invalid auth alg %d", 4360 ifmgd->auth_data->algorithm); 4361 goto notify_driver; 4362 } 4363 4364 event.u.mlme.status = MLME_SUCCESS; 4365 info.success = 1; 4366 drv_event_callback(sdata->local, sdata, &event); 4367 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 4368 (auth_transaction == 2 && 4369 ifmgd->auth_data->expected_transaction == 2)) { 4370 if (!ieee80211_mark_sta_auth(sdata)) 4371 return; /* ignore frame -- wait for timeout */ 4372 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 4373 auth_transaction == 2) { 4374 sdata_info(sdata, "SAE peer confirmed\n"); 4375 ifmgd->auth_data->peer_confirmed = true; 4376 } 4377 4378 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4379 notify_driver: 4380 drv_mgd_complete_tx(sdata->local, sdata, &info); 4381 } 4382 4383 #define case_WLAN(type) \ 4384 case WLAN_REASON_##type: return #type 4385 4386 const char *ieee80211_get_reason_code_string(u16 reason_code) 4387 { 4388 switch (reason_code) { 4389 case_WLAN(UNSPECIFIED); 4390 case_WLAN(PREV_AUTH_NOT_VALID); 4391 case_WLAN(DEAUTH_LEAVING); 4392 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 4393 case_WLAN(DISASSOC_AP_BUSY); 4394 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 4395 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 4396 case_WLAN(DISASSOC_STA_HAS_LEFT); 4397 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 4398 case_WLAN(DISASSOC_BAD_POWER); 4399 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 4400 case_WLAN(INVALID_IE); 4401 case_WLAN(MIC_FAILURE); 4402 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 4403 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 4404 case_WLAN(IE_DIFFERENT); 4405 case_WLAN(INVALID_GROUP_CIPHER); 4406 case_WLAN(INVALID_PAIRWISE_CIPHER); 4407 case_WLAN(INVALID_AKMP); 4408 case_WLAN(UNSUPP_RSN_VERSION); 4409 case_WLAN(INVALID_RSN_IE_CAP); 4410 case_WLAN(IEEE8021X_FAILED); 4411 case_WLAN(CIPHER_SUITE_REJECTED); 4412 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4413 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4414 case_WLAN(DISASSOC_LOW_ACK); 4415 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4416 case_WLAN(QSTA_LEAVE_QBSS); 4417 case_WLAN(QSTA_NOT_USE); 4418 case_WLAN(QSTA_REQUIRE_SETUP); 4419 case_WLAN(QSTA_TIMEOUT); 4420 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4421 case_WLAN(MESH_PEER_CANCELED); 4422 case_WLAN(MESH_MAX_PEERS); 4423 case_WLAN(MESH_CONFIG); 4424 case_WLAN(MESH_CLOSE); 4425 case_WLAN(MESH_MAX_RETRIES); 4426 case_WLAN(MESH_CONFIRM_TIMEOUT); 4427 case_WLAN(MESH_INVALID_GTK); 4428 case_WLAN(MESH_INCONSISTENT_PARAM); 4429 case_WLAN(MESH_INVALID_SECURITY); 4430 case_WLAN(MESH_PATH_ERROR); 4431 case_WLAN(MESH_PATH_NOFORWARD); 4432 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4433 case_WLAN(MAC_EXISTS_IN_MBSS); 4434 case_WLAN(MESH_CHAN_REGULATORY); 4435 case_WLAN(MESH_CHAN); 4436 default: return "<unknown>"; 4437 } 4438 } 4439 4440 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4441 struct ieee80211_mgmt *mgmt, size_t len) 4442 { 4443 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4444 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4445 4446 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4447 4448 if (len < 24 + 2) 4449 return; 4450 4451 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4452 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4453 return; 4454 } 4455 4456 if (ifmgd->associated && 4457 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4458 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4459 sdata->vif.cfg.ap_addr, reason_code, 4460 ieee80211_get_reason_code_string(reason_code)); 4461 4462 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4463 4464 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4465 reason_code, false); 4466 return; 4467 } 4468 4469 if (ifmgd->assoc_data && 4470 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4471 sdata_info(sdata, 4472 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4473 ifmgd->assoc_data->ap_addr, reason_code, 4474 ieee80211_get_reason_code_string(reason_code)); 4475 4476 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4477 4478 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4479 return; 4480 } 4481 } 4482 4483 4484 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4485 struct ieee80211_mgmt *mgmt, size_t len) 4486 { 4487 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4488 u16 reason_code; 4489 4490 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4491 4492 if (len < 24 + 2) 4493 return; 4494 4495 if (!ifmgd->associated || 4496 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4497 return; 4498 4499 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4500 4501 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4502 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4503 return; 4504 } 4505 4506 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4507 sdata->vif.cfg.ap_addr, reason_code, 4508 ieee80211_get_reason_code_string(reason_code)); 4509 4510 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4511 4512 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4513 false); 4514 } 4515 4516 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4517 u8 *supp_rates, unsigned int supp_rates_len, 4518 u32 *rates, u32 *basic_rates, 4519 bool *have_higher_than_11mbit, 4520 int *min_rate, int *min_rate_index) 4521 { 4522 int i, j; 4523 4524 for (i = 0; i < supp_rates_len; i++) { 4525 int rate = supp_rates[i] & 0x7f; 4526 bool is_basic = !!(supp_rates[i] & 0x80); 4527 4528 if ((rate * 5) > 110) 4529 *have_higher_than_11mbit = true; 4530 4531 /* 4532 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4533 * selectors since they're not rates. 4534 * 4535 * Note: Even though the membership selector and the basic 4536 * rate flag share the same bit, they are not exactly 4537 * the same. 4538 */ 4539 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4540 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4541 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4542 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4543 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4544 continue; 4545 4546 for (j = 0; j < sband->n_bitrates; j++) { 4547 struct ieee80211_rate *br; 4548 int brate; 4549 4550 br = &sband->bitrates[j]; 4551 4552 brate = DIV_ROUND_UP(br->bitrate, 5); 4553 if (brate == rate) { 4554 *rates |= BIT(j); 4555 if (is_basic) 4556 *basic_rates |= BIT(j); 4557 if ((rate * 5) < *min_rate) { 4558 *min_rate = rate * 5; 4559 *min_rate_index = j; 4560 } 4561 break; 4562 } 4563 } 4564 } 4565 } 4566 4567 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4568 struct ieee80211_supported_band *sband, 4569 const struct link_sta_info *link_sta, 4570 const struct ieee802_11_elems *elems) 4571 { 4572 const struct ieee80211_sta_he_cap *own_he_cap = 4573 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4574 4575 if (elems->ext_capab_len < 10) 4576 return false; 4577 4578 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4579 return false; 4580 4581 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4582 IEEE80211_HE_MAC_CAP0_TWT_RES && 4583 own_he_cap && 4584 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4585 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4586 } 4587 4588 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4589 struct ieee80211_supported_band *sband, 4590 struct ieee80211_link_data *link, 4591 struct link_sta_info *link_sta, 4592 struct ieee802_11_elems *elems) 4593 { 4594 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4595 4596 if (link->conf->twt_requester != twt) { 4597 link->conf->twt_requester = twt; 4598 return BSS_CHANGED_TWT; 4599 } 4600 return 0; 4601 } 4602 4603 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4604 struct ieee80211_bss_conf *bss_conf, 4605 struct ieee80211_supported_band *sband, 4606 struct link_sta_info *link_sta) 4607 { 4608 const struct ieee80211_sta_he_cap *own_he_cap = 4609 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4610 4611 return bss_conf->he_support && 4612 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4613 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4614 own_he_cap && 4615 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4616 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4617 } 4618 4619 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4620 struct link_sta_info *link_sta, 4621 struct cfg80211_bss *cbss, 4622 struct ieee80211_mgmt *mgmt, 4623 const u8 *elem_start, 4624 unsigned int elem_len, 4625 u64 *changed) 4626 { 4627 struct ieee80211_sub_if_data *sdata = link->sdata; 4628 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4629 struct ieee80211_bss_conf *bss_conf = link->conf; 4630 struct ieee80211_local *local = sdata->local; 4631 unsigned int link_id = link->link_id; 4632 struct ieee80211_elems_parse_params parse_params = { 4633 .mode = link->u.mgd.conn.mode, 4634 .start = elem_start, 4635 .len = elem_len, 4636 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4637 .from_ap = true, 4638 }; 4639 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4640 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4641 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4642 const struct cfg80211_bss_ies *bss_ies = NULL; 4643 struct ieee80211_supported_band *sband; 4644 struct ieee802_11_elems *elems; 4645 const __le16 prof_bss_param_ch_present = 4646 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4647 u16 capab_info; 4648 bool ret; 4649 4650 elems = ieee802_11_parse_elems_full(&parse_params); 4651 if (!elems) 4652 return false; 4653 4654 if (link_id == assoc_data->assoc_link_id) { 4655 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4656 4657 /* 4658 * we should not get to this flow unless the association was 4659 * successful, so set the status directly to success 4660 */ 4661 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4662 if (elems->ml_basic) { 4663 int bss_param_ch_cnt = 4664 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4665 4666 if (bss_param_ch_cnt < 0) { 4667 ret = false; 4668 goto out; 4669 } 4670 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; 4671 } 4672 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4673 !elems->prof || 4674 !(elems->prof->control & prof_bss_param_ch_present)) { 4675 ret = false; 4676 goto out; 4677 } else { 4678 const u8 *ptr = elems->prof->variable + 4679 elems->prof->sta_info_len - 1; 4680 4681 /* 4682 * During parsing, we validated that these fields exist, 4683 * otherwise elems->prof would have been set to NULL. 4684 */ 4685 capab_info = get_unaligned_le16(ptr); 4686 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4687 link->u.mgd.bss_param_ch_cnt = 4688 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4689 4690 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4691 link_info(link, "association response status code=%u\n", 4692 assoc_data->link[link_id].status); 4693 ret = true; 4694 goto out; 4695 } 4696 } 4697 4698 if (!is_s1g && !elems->supp_rates) { 4699 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4700 ret = false; 4701 goto out; 4702 } 4703 4704 link->u.mgd.tdls_chan_switch_prohibited = 4705 elems->ext_capab && elems->ext_capab_len >= 5 && 4706 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4707 4708 /* 4709 * Some APs are erroneously not including some information in their 4710 * (re)association response frames. Try to recover by using the data 4711 * from the beacon or probe response. This seems to afflict mobile 4712 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4713 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4714 */ 4715 if (!is_6ghz && 4716 ((assoc_data->wmm && !elems->wmm_param) || 4717 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4718 (!elems->ht_cap_elem || !elems->ht_operation)) || 4719 (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4720 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4721 const struct cfg80211_bss_ies *ies; 4722 struct ieee802_11_elems *bss_elems; 4723 4724 rcu_read_lock(); 4725 ies = rcu_dereference(cbss->ies); 4726 if (ies) 4727 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4728 GFP_ATOMIC); 4729 rcu_read_unlock(); 4730 if (!bss_ies) { 4731 ret = false; 4732 goto out; 4733 } 4734 4735 parse_params.start = bss_ies->data; 4736 parse_params.len = bss_ies->len; 4737 parse_params.bss = cbss; 4738 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4739 if (!bss_elems) { 4740 ret = false; 4741 goto out; 4742 } 4743 4744 if (assoc_data->wmm && 4745 !elems->wmm_param && bss_elems->wmm_param) { 4746 elems->wmm_param = bss_elems->wmm_param; 4747 sdata_info(sdata, 4748 "AP bug: WMM param missing from AssocResp\n"); 4749 } 4750 4751 /* 4752 * Also check if we requested HT/VHT, otherwise the AP doesn't 4753 * have to include the IEs in the (re)association response. 4754 */ 4755 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4756 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4757 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4758 sdata_info(sdata, 4759 "AP bug: HT capability missing from AssocResp\n"); 4760 } 4761 if (!elems->ht_operation && bss_elems->ht_operation && 4762 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4763 elems->ht_operation = bss_elems->ht_operation; 4764 sdata_info(sdata, 4765 "AP bug: HT operation missing from AssocResp\n"); 4766 } 4767 4768 if (is_5ghz) { 4769 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4770 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4771 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4772 sdata_info(sdata, 4773 "AP bug: VHT capa missing from AssocResp\n"); 4774 } 4775 4776 if (!elems->vht_operation && bss_elems->vht_operation && 4777 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4778 elems->vht_operation = bss_elems->vht_operation; 4779 sdata_info(sdata, 4780 "AP bug: VHT operation missing from AssocResp\n"); 4781 } 4782 } 4783 kfree(bss_elems); 4784 } 4785 4786 /* 4787 * We previously checked these in the beacon/probe response, so 4788 * they should be present here. This is just a safety net. 4789 * Note that the ieee80211_config_bw() below would also check 4790 * for this (and more), but this has better error reporting. 4791 */ 4792 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4793 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4794 sdata_info(sdata, 4795 "HT AP is missing WMM params or HT capability/operation\n"); 4796 ret = false; 4797 goto out; 4798 } 4799 4800 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4801 (!elems->vht_cap_elem || !elems->vht_operation)) { 4802 sdata_info(sdata, 4803 "VHT AP is missing VHT capability/operation\n"); 4804 ret = false; 4805 goto out; 4806 } 4807 4808 /* check/update if AP changed anything in assoc response vs. scan */ 4809 if (ieee80211_config_bw(link, elems, 4810 link_id == assoc_data->assoc_link_id, 4811 changed)) { 4812 ret = false; 4813 goto out; 4814 } 4815 4816 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4817 ret = false; 4818 goto out; 4819 } 4820 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4821 4822 /* Set up internal HT/VHT capabilities */ 4823 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4824 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4825 elems->ht_cap_elem, 4826 link_sta); 4827 4828 if (elems->vht_cap_elem && 4829 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4830 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4831 const struct cfg80211_bss_ies *ies; 4832 4833 /* 4834 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4835 * too large maximum MPDU length in the association response 4836 * (indicating 12k) that it cannot actually process ... 4837 * Work around that. 4838 */ 4839 rcu_read_lock(); 4840 ies = rcu_dereference(cbss->ies); 4841 if (ies) { 4842 const struct element *elem; 4843 4844 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4845 ies->data, ies->len); 4846 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4847 bss_vht_cap = (const void *)elem->data; 4848 } 4849 4850 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4851 elems->vht_cap_elem, 4852 bss_vht_cap, link_sta); 4853 rcu_read_unlock(); 4854 } 4855 4856 if (elems->he_operation && 4857 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4858 elems->he_cap) { 4859 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4860 elems->he_cap, 4861 elems->he_cap_len, 4862 elems->he_6ghz_capa, 4863 link_sta); 4864 4865 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4866 if (elems->rsnx && elems->rsnx_len && 4867 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4868 wiphy_ext_feature_isset(local->hw.wiphy, 4869 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4870 bss_conf->twt_protected = true; 4871 else 4872 bss_conf->twt_protected = false; 4873 4874 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4875 link_sta, elems); 4876 4877 if (elems->eht_operation && elems->eht_cap && 4878 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4879 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4880 elems->he_cap, 4881 elems->he_cap_len, 4882 elems->eht_cap, 4883 elems->eht_cap_len, 4884 link_sta); 4885 4886 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4887 } else { 4888 bss_conf->eht_support = false; 4889 } 4890 } else { 4891 bss_conf->he_support = false; 4892 bss_conf->twt_requester = false; 4893 bss_conf->twt_protected = false; 4894 bss_conf->eht_support = false; 4895 } 4896 4897 bss_conf->twt_broadcast = 4898 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4899 4900 if (bss_conf->he_support) { 4901 bss_conf->he_bss_color.color = 4902 le32_get_bits(elems->he_operation->he_oper_params, 4903 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4904 bss_conf->he_bss_color.partial = 4905 le32_get_bits(elems->he_operation->he_oper_params, 4906 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4907 bss_conf->he_bss_color.enabled = 4908 !le32_get_bits(elems->he_operation->he_oper_params, 4909 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4910 4911 if (bss_conf->he_bss_color.enabled) 4912 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4913 4914 bss_conf->htc_trig_based_pkt_ext = 4915 le32_get_bits(elems->he_operation->he_oper_params, 4916 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4917 bss_conf->frame_time_rts_th = 4918 le32_get_bits(elems->he_operation->he_oper_params, 4919 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4920 4921 bss_conf->uora_exists = !!elems->uora_element; 4922 if (elems->uora_element) 4923 bss_conf->uora_ocw_range = elems->uora_element[0]; 4924 4925 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4926 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4927 /* TODO: OPEN: what happens if BSS color disable is set? */ 4928 } 4929 4930 if (cbss->transmitted_bss) { 4931 bss_conf->nontransmitted = true; 4932 ether_addr_copy(bss_conf->transmitter_bssid, 4933 cbss->transmitted_bss->bssid); 4934 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4935 bss_conf->bssid_index = cbss->bssid_index; 4936 } 4937 4938 /* 4939 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4940 * in their association response, so ignore that data for our own 4941 * configuration. If it changed since the last beacon, we'll get the 4942 * next beacon and update then. 4943 */ 4944 4945 /* 4946 * If an operating mode notification IE is present, override the 4947 * NSS calculation (that would be done in rate_control_rate_init()) 4948 * and use the # of streams from that element. 4949 */ 4950 if (elems->opmode_notif && 4951 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4952 u8 nss; 4953 4954 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4955 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4956 nss += 1; 4957 link_sta->pub->rx_nss = nss; 4958 } 4959 4960 /* 4961 * Always handle WMM once after association regardless 4962 * of the first value the AP uses. Setting -1 here has 4963 * that effect because the AP values is an unsigned 4964 * 4-bit value. 4965 */ 4966 link->u.mgd.wmm_last_param_set = -1; 4967 link->u.mgd.mu_edca_last_param_set = -1; 4968 4969 if (link->u.mgd.disable_wmm_tracking) { 4970 ieee80211_set_wmm_default(link, false, false); 4971 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4972 elems->wmm_param_len, 4973 elems->mu_edca_param_set)) { 4974 /* still enable QoS since we might have HT/VHT */ 4975 ieee80211_set_wmm_default(link, false, true); 4976 /* disable WMM tracking in this case to disable 4977 * tracking WMM parameter changes in the beacon if 4978 * the parameters weren't actually valid. Doing so 4979 * avoids changing parameters very strangely when 4980 * the AP is going back and forth between valid and 4981 * invalid parameters. 4982 */ 4983 link->u.mgd.disable_wmm_tracking = true; 4984 } 4985 4986 if (elems->max_idle_period_ie) { 4987 bss_conf->max_idle_period = 4988 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4989 bss_conf->protected_keep_alive = 4990 !!(elems->max_idle_period_ie->idle_options & 4991 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4992 *changed |= BSS_CHANGED_KEEP_ALIVE; 4993 } else { 4994 bss_conf->max_idle_period = 0; 4995 bss_conf->protected_keep_alive = false; 4996 } 4997 4998 /* set assoc capability (AID was already set earlier), 4999 * ieee80211_set_associated() will tell the driver */ 5000 bss_conf->assoc_capability = capab_info; 5001 5002 ret = true; 5003 out: 5004 kfree(elems); 5005 kfree(bss_ies); 5006 return ret; 5007 } 5008 5009 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 5010 struct sta_info *sta, 5011 struct link_sta_info *link_sta, 5012 struct cfg80211_bss *cbss) 5013 { 5014 struct ieee80211_sub_if_data *sdata = link->sdata; 5015 struct ieee80211_local *local = sdata->local; 5016 struct ieee80211_bss *bss = (void *)cbss->priv; 5017 u32 rates = 0, basic_rates = 0; 5018 bool have_higher_than_11mbit = false; 5019 int min_rate = INT_MAX, min_rate_index = -1; 5020 struct ieee80211_supported_band *sband; 5021 5022 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 5023 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 5024 5025 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 5026 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 5027 ieee80211_s1g_sta_rate_init(sta); 5028 return 0; 5029 } 5030 5031 sband = local->hw.wiphy->bands[cbss->channel->band]; 5032 5033 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 5034 &rates, &basic_rates, &have_higher_than_11mbit, 5035 &min_rate, &min_rate_index); 5036 5037 /* 5038 * This used to be a workaround for basic rates missing 5039 * in the association response frame. Now that we no 5040 * longer use the basic rates from there, it probably 5041 * doesn't happen any more, but keep the workaround so 5042 * in case some *other* APs are buggy in different ways 5043 * we can connect -- with a warning. 5044 * Allow this workaround only in case the AP provided at least 5045 * one rate. 5046 */ 5047 if (min_rate_index < 0) { 5048 link_info(link, "No legacy rates in association response\n"); 5049 return -EINVAL; 5050 } else if (!basic_rates) { 5051 link_info(link, "No basic rates, using min rate instead\n"); 5052 basic_rates = BIT(min_rate_index); 5053 } 5054 5055 if (rates) 5056 link_sta->pub->supp_rates[cbss->channel->band] = rates; 5057 else 5058 link_info(link, "No rates found, keeping mandatory only\n"); 5059 5060 link->conf->basic_rates = basic_rates; 5061 5062 /* cf. IEEE 802.11 9.2.12 */ 5063 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 5064 have_higher_than_11mbit; 5065 5066 return 0; 5067 } 5068 5069 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 5070 struct cfg80211_bss *cbss) 5071 { 5072 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 5073 const struct element *ht_cap_elem, *vht_cap_elem; 5074 const struct cfg80211_bss_ies *ies; 5075 const struct ieee80211_ht_cap *ht_cap; 5076 const struct ieee80211_vht_cap *vht_cap; 5077 const struct ieee80211_he_cap_elem *he_cap; 5078 const struct element *he_cap_elem; 5079 u16 mcs_80_map, mcs_160_map; 5080 int i, mcs_nss_size; 5081 bool support_160; 5082 u8 chains = 1; 5083 5084 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 5085 return chains; 5086 5087 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 5088 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 5089 ht_cap = (void *)ht_cap_elem->data; 5090 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 5091 /* 5092 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 5093 * "Tx Unequal Modulation Supported" fields. 5094 */ 5095 } 5096 5097 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 5098 return chains; 5099 5100 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 5101 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 5102 u8 nss; 5103 u16 tx_mcs_map; 5104 5105 vht_cap = (void *)vht_cap_elem->data; 5106 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 5107 for (nss = 8; nss > 0; nss--) { 5108 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 5109 IEEE80211_VHT_MCS_NOT_SUPPORTED) 5110 break; 5111 } 5112 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 5113 chains = max(chains, nss); 5114 } 5115 5116 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 5117 return chains; 5118 5119 ies = rcu_dereference(cbss->ies); 5120 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 5121 ies->data, ies->len); 5122 5123 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 5124 return chains; 5125 5126 /* skip one byte ext_tag_id */ 5127 he_cap = (void *)(he_cap_elem->data + 1); 5128 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 5129 5130 /* invalid HE IE */ 5131 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 5132 return chains; 5133 5134 /* mcs_nss is right after he_cap info */ 5135 he_mcs_nss_supp = (void *)(he_cap + 1); 5136 5137 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 5138 5139 for (i = 7; i >= 0; i--) { 5140 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 5141 5142 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5143 chains = max_t(u8, chains, i + 1); 5144 break; 5145 } 5146 } 5147 5148 support_160 = he_cap->phy_cap_info[0] & 5149 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 5150 5151 if (!support_160) 5152 return chains; 5153 5154 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 5155 for (i = 7; i >= 0; i--) { 5156 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 5157 5158 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 5159 chains = max_t(u8, chains, i + 1); 5160 break; 5161 } 5162 } 5163 5164 return chains; 5165 } 5166 5167 static void 5168 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 5169 struct ieee80211_supported_band *sband, 5170 struct cfg80211_assoc_request *req, 5171 bool wmm_used, int link_id, 5172 struct ieee80211_conn_settings *conn) 5173 { 5174 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 5175 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 5176 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 5177 const struct ieee80211_sta_he_cap *he_cap; 5178 const struct ieee80211_sta_eht_cap *eht_cap; 5179 struct ieee80211_sta_vht_cap vht_cap; 5180 5181 if (sband->band == NL80211_BAND_S1GHZ) { 5182 conn->mode = IEEE80211_CONN_MODE_S1G; 5183 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5184 mlme_dbg(sdata, "operating as S1G STA\n"); 5185 return; 5186 } 5187 5188 conn->mode = IEEE80211_CONN_MODE_LEGACY; 5189 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5190 5191 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 5192 5193 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 5194 mlme_link_id_dbg(sdata, link_id, 5195 "HT disabled by flag, limiting to legacy\n"); 5196 goto out; 5197 } 5198 5199 if (!wmm_used) { 5200 mlme_link_id_dbg(sdata, link_id, 5201 "WMM/QoS not supported, limiting to legacy\n"); 5202 goto out; 5203 } 5204 5205 if (req) { 5206 unsigned int i; 5207 5208 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 5209 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 5210 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 5211 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 5212 netdev_info(sdata->dev, 5213 "WEP/TKIP use, limiting to legacy\n"); 5214 goto out; 5215 } 5216 } 5217 } 5218 5219 if (!sta_ht_cap.ht_supported && !is_6ghz) { 5220 mlme_link_id_dbg(sdata, link_id, 5221 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 5222 goto out; 5223 } 5224 5225 /* HT is fine */ 5226 conn->mode = IEEE80211_CONN_MODE_HT; 5227 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 5228 IEEE80211_CONN_BW_LIMIT_40 : 5229 IEEE80211_CONN_BW_LIMIT_20; 5230 5231 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 5232 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 5233 5234 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 5235 mlme_link_id_dbg(sdata, link_id, 5236 "VHT disabled by flag, limiting to HT\n"); 5237 goto out; 5238 } 5239 5240 if (vht_cap.vht_supported && is_5ghz) { 5241 bool have_80mhz = false; 5242 unsigned int i; 5243 5244 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 5245 mlme_link_id_dbg(sdata, link_id, 5246 "no 40 MHz support on 5 GHz, limiting to HT\n"); 5247 goto out; 5248 } 5249 5250 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 5251 for (i = 0; i < sband->n_channels; i++) { 5252 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 5253 IEEE80211_CHAN_NO_80MHZ)) 5254 continue; 5255 5256 have_80mhz = true; 5257 break; 5258 } 5259 5260 if (!have_80mhz) { 5261 mlme_link_id_dbg(sdata, link_id, 5262 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 5263 goto out; 5264 } 5265 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 5266 mlme_link_id_dbg(sdata, link_id, 5267 "no VHT support on 5 GHz, limiting to HT\n"); 5268 goto out; 5269 } 5270 5271 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 5272 if (sband->band != NL80211_BAND_2GHZ) { 5273 conn->mode = IEEE80211_CONN_MODE_VHT; 5274 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 5275 } 5276 5277 if (is_5ghz && 5278 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 5279 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 5280 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 5281 mlme_link_id_dbg(sdata, link_id, 5282 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 5283 } 5284 5285 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 5286 mlme_link_id_dbg(sdata, link_id, 5287 "HE disabled by flag, limiting to HT/VHT\n"); 5288 goto out; 5289 } 5290 5291 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 5292 if (!he_cap) { 5293 WARN_ON(is_6ghz); 5294 mlme_link_id_dbg(sdata, link_id, 5295 "no HE support, limiting to HT/VHT\n"); 5296 goto out; 5297 } 5298 5299 /* so we have HE */ 5300 conn->mode = IEEE80211_CONN_MODE_HE; 5301 5302 /* check bandwidth */ 5303 switch (sband->band) { 5304 default: 5305 case NL80211_BAND_2GHZ: 5306 if (he_cap->he_cap_elem.phy_cap_info[0] & 5307 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 5308 break; 5309 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5310 mlme_link_id_dbg(sdata, link_id, 5311 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 5312 break; 5313 case NL80211_BAND_5GHZ: 5314 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5315 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 5316 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 5317 mlme_link_id_dbg(sdata, link_id, 5318 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 5319 break; 5320 } 5321 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 5322 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 5323 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5324 conn->bw_limit, 5325 IEEE80211_CONN_BW_LIMIT_80); 5326 mlme_link_id_dbg(sdata, link_id, 5327 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 5328 } 5329 break; 5330 case NL80211_BAND_6GHZ: 5331 if (he_cap->he_cap_elem.phy_cap_info[0] & 5332 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 5333 break; 5334 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5335 conn->bw_limit, 5336 IEEE80211_CONN_BW_LIMIT_80); 5337 mlme_link_id_dbg(sdata, link_id, 5338 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 5339 break; 5340 } 5341 5342 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 5343 mlme_link_id_dbg(sdata, link_id, 5344 "EHT disabled by flag, limiting to HE\n"); 5345 goto out; 5346 } 5347 5348 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 5349 if (!eht_cap) { 5350 mlme_link_id_dbg(sdata, link_id, 5351 "no EHT support, limiting to HE\n"); 5352 goto out; 5353 } 5354 5355 /* we have EHT */ 5356 5357 conn->mode = IEEE80211_CONN_MODE_EHT; 5358 5359 /* check bandwidth */ 5360 if (is_6ghz && 5361 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 5362 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 5363 else if (is_6ghz) 5364 mlme_link_id_dbg(sdata, link_id, 5365 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 5366 5367 out: 5368 mlme_link_id_dbg(sdata, link_id, 5369 "determined local STA to be %s, BW limited to %d MHz\n", 5370 ieee80211_conn_mode_str(conn->mode), 5371 20 * (1 << conn->bw_limit)); 5372 } 5373 5374 static void 5375 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 5376 struct ieee80211_supported_band *sband, 5377 struct cfg80211_auth_request *req, 5378 bool wmm_used, 5379 struct ieee80211_conn_settings *conn) 5380 { 5381 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 5382 req->link_id > 0 ? req->link_id : 0, 5383 conn); 5384 } 5385 5386 static void 5387 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5388 struct ieee80211_supported_band *sband, 5389 struct cfg80211_assoc_request *req, 5390 bool wmm_used, int link_id, 5391 struct ieee80211_conn_settings *conn) 5392 { 5393 struct ieee80211_conn_settings tmp; 5394 5395 WARN_ON(!req); 5396 5397 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5398 &tmp); 5399 5400 conn->mode = min_t(enum ieee80211_conn_mode, 5401 conn->mode, tmp.mode); 5402 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5403 conn->bw_limit, tmp.bw_limit); 5404 } 5405 5406 static enum ieee80211_ap_reg_power 5407 ieee80211_ap_power_type(u8 control) 5408 { 5409 switch (u8_get_bits(control, IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 5410 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 5411 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 5412 return IEEE80211_REG_LPI_AP; 5413 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 5414 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 5415 return IEEE80211_REG_SP_AP; 5416 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 5417 return IEEE80211_REG_VLP_AP; 5418 default: 5419 return IEEE80211_REG_UNSET_AP; 5420 } 5421 } 5422 5423 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5424 struct ieee80211_link_data *link, 5425 int link_id, 5426 struct cfg80211_bss *cbss, bool mlo, 5427 struct ieee80211_conn_settings *conn) 5428 { 5429 struct ieee80211_local *local = sdata->local; 5430 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5431 struct ieee80211_chan_req chanreq = {}; 5432 struct cfg80211_chan_def ap_chandef; 5433 struct ieee802_11_elems *elems; 5434 int ret; 5435 5436 lockdep_assert_wiphy(local->hw.wiphy); 5437 5438 rcu_read_lock(); 5439 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5440 &chanreq, &ap_chandef); 5441 5442 if (IS_ERR(elems)) { 5443 rcu_read_unlock(); 5444 return PTR_ERR(elems); 5445 } 5446 5447 if (mlo && !elems->ml_basic) { 5448 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5449 rcu_read_unlock(); 5450 kfree(elems); 5451 return -EINVAL; 5452 } 5453 5454 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5455 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 5456 5457 if (elems->pwr_constr_elem) 5458 link->conf->pwr_reduction = *elems->pwr_constr_elem; 5459 5460 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 5461 if (he_6ghz_oper) 5462 link->conf->power_type = 5463 ieee80211_ap_power_type(he_6ghz_oper->control); 5464 else 5465 link_info(link, 5466 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 5467 cbss->channel->center_freq); 5468 5469 link->conf->tpe = elems->tpe; 5470 ieee80211_rearrange_tpe(&link->conf->tpe, &ap_chandef, 5471 &chanreq.oper); 5472 } 5473 rcu_read_unlock(); 5474 /* the element data was RCU protected so no longer valid anyway */ 5475 kfree(elems); 5476 elems = NULL; 5477 5478 if (!link) 5479 return 0; 5480 5481 rcu_read_lock(); 5482 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5483 local->rx_chains); 5484 rcu_read_unlock(); 5485 5486 /* 5487 * If this fails (possibly due to channel context sharing 5488 * on incompatible channels, e.g. 80+80 and 160 sharing the 5489 * same control channel) try to use a smaller bandwidth. 5490 */ 5491 ret = ieee80211_link_use_channel(link, &chanreq, 5492 IEEE80211_CHANCTX_SHARED); 5493 5494 /* don't downgrade for 5 and 10 MHz channels, though. */ 5495 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5496 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5497 return ret; 5498 5499 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5500 ieee80211_chanreq_downgrade(&chanreq, conn); 5501 5502 ret = ieee80211_link_use_channel(link, &chanreq, 5503 IEEE80211_CHANCTX_SHARED); 5504 } 5505 5506 return ret; 5507 } 5508 5509 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5510 u8 *dtim_count, u8 *dtim_period) 5511 { 5512 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5513 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5514 ies->len); 5515 const struct ieee80211_tim_ie *tim = NULL; 5516 const struct ieee80211_bssid_index *idx; 5517 bool valid = tim_ie && tim_ie[1] >= 2; 5518 5519 if (valid) 5520 tim = (void *)(tim_ie + 2); 5521 5522 if (dtim_count) 5523 *dtim_count = valid ? tim->dtim_count : 0; 5524 5525 if (dtim_period) 5526 *dtim_period = valid ? tim->dtim_period : 0; 5527 5528 /* Check if value is overridden by non-transmitted profile */ 5529 if (!idx_ie || idx_ie[1] < 3) 5530 return valid; 5531 5532 idx = (void *)(idx_ie + 2); 5533 5534 if (dtim_count) 5535 *dtim_count = idx->dtim_count; 5536 5537 if (dtim_period) 5538 *dtim_period = idx->dtim_period; 5539 5540 return true; 5541 } 5542 5543 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5544 struct ieee80211_mgmt *mgmt, 5545 struct ieee802_11_elems *elems, 5546 const u8 *elem_start, unsigned int elem_len) 5547 { 5548 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5549 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5550 struct ieee80211_local *local = sdata->local; 5551 unsigned int link_id; 5552 struct sta_info *sta; 5553 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5554 u16 valid_links = 0, dormant_links = 0; 5555 int err; 5556 5557 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5558 /* 5559 * station info was already allocated and inserted before 5560 * the association and should be available to us 5561 */ 5562 sta = sta_info_get(sdata, assoc_data->ap_addr); 5563 if (WARN_ON(!sta)) 5564 goto out_err; 5565 5566 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5567 5568 if (ieee80211_vif_is_mld(&sdata->vif)) { 5569 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5570 if (!assoc_data->link[link_id].bss) 5571 continue; 5572 5573 valid_links |= BIT(link_id); 5574 if (assoc_data->link[link_id].disabled) 5575 dormant_links |= BIT(link_id); 5576 5577 if (link_id != assoc_data->assoc_link_id) { 5578 err = ieee80211_sta_allocate_link(sta, link_id); 5579 if (err) 5580 goto out_err; 5581 } 5582 } 5583 5584 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5585 } 5586 5587 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5588 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5589 struct ieee80211_link_data *link; 5590 struct link_sta_info *link_sta; 5591 5592 if (!cbss) 5593 continue; 5594 5595 link = sdata_dereference(sdata->link[link_id], sdata); 5596 if (WARN_ON(!link)) 5597 goto out_err; 5598 5599 if (ieee80211_vif_is_mld(&sdata->vif)) 5600 link_info(link, 5601 "local address %pM, AP link address %pM%s\n", 5602 link->conf->addr, 5603 assoc_data->link[link_id].bss->bssid, 5604 link_id == assoc_data->assoc_link_id ? 5605 " (assoc)" : ""); 5606 5607 link_sta = rcu_dereference_protected(sta->link[link_id], 5608 lockdep_is_held(&local->hw.wiphy->mtx)); 5609 if (WARN_ON(!link_sta)) 5610 goto out_err; 5611 5612 if (!link->u.mgd.have_beacon) { 5613 const struct cfg80211_bss_ies *ies; 5614 5615 rcu_read_lock(); 5616 ies = rcu_dereference(cbss->beacon_ies); 5617 if (ies) 5618 link->u.mgd.have_beacon = true; 5619 else 5620 ies = rcu_dereference(cbss->ies); 5621 ieee80211_get_dtim(ies, 5622 &link->conf->sync_dtim_count, 5623 &link->u.mgd.dtim_period); 5624 link->conf->beacon_int = cbss->beacon_interval; 5625 rcu_read_unlock(); 5626 } 5627 5628 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5629 5630 if (link_id != assoc_data->assoc_link_id) { 5631 link->u.mgd.conn = assoc_data->link[link_id].conn; 5632 5633 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5634 true, &link->u.mgd.conn); 5635 if (err) { 5636 link_info(link, "prep_channel failed\n"); 5637 goto out_err; 5638 } 5639 } 5640 5641 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5642 assoc_data->link[link_id].bss); 5643 if (err) 5644 goto out_err; 5645 5646 if (!ieee80211_assoc_config_link(link, link_sta, 5647 assoc_data->link[link_id].bss, 5648 mgmt, elem_start, elem_len, 5649 &changed[link_id])) 5650 goto out_err; 5651 5652 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5653 valid_links &= ~BIT(link_id); 5654 ieee80211_sta_remove_link(sta, link_id); 5655 continue; 5656 } 5657 5658 if (link_id != assoc_data->assoc_link_id) { 5659 err = ieee80211_sta_activate_link(sta, link_id); 5660 if (err) 5661 goto out_err; 5662 } 5663 } 5664 5665 /* links might have changed due to rejected ones, set them again */ 5666 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5667 5668 rate_control_rate_init(sta); 5669 5670 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5671 set_sta_flag(sta, WLAN_STA_MFP); 5672 sta->sta.mfp = true; 5673 } else { 5674 sta->sta.mfp = false; 5675 } 5676 5677 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5678 elems->ext_capab_len); 5679 5680 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5681 local->hw.queues >= IEEE80211_NUM_ACS; 5682 5683 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5684 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5685 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5686 if (err) { 5687 sdata_info(sdata, 5688 "failed to move station %pM to desired state\n", 5689 sta->sta.addr); 5690 WARN_ON(__sta_info_destroy(sta)); 5691 goto out_err; 5692 } 5693 5694 if (sdata->wdev.use_4addr) 5695 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5696 5697 ieee80211_set_associated(sdata, assoc_data, changed); 5698 5699 /* 5700 * If we're using 4-addr mode, let the AP know that we're 5701 * doing so, so that it can create the STA VLAN on its side 5702 */ 5703 if (ifmgd->use_4addr) 5704 ieee80211_send_4addr_nullfunc(local, sdata); 5705 5706 /* 5707 * Start timer to probe the connection to the AP now. 5708 * Also start the timer that will detect beacon loss. 5709 */ 5710 ieee80211_sta_reset_beacon_monitor(sdata); 5711 ieee80211_sta_reset_conn_monitor(sdata); 5712 5713 return true; 5714 out_err: 5715 eth_zero_addr(sdata->vif.cfg.ap_addr); 5716 return false; 5717 } 5718 5719 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5720 struct ieee80211_mgmt *mgmt, 5721 size_t len) 5722 { 5723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5724 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5725 u16 capab_info, status_code, aid; 5726 struct ieee80211_elems_parse_params parse_params = { 5727 .bss = NULL, 5728 .link_id = -1, 5729 .from_ap = true, 5730 }; 5731 struct ieee802_11_elems *elems; 5732 int ac; 5733 const u8 *elem_start; 5734 unsigned int elem_len; 5735 bool reassoc; 5736 struct ieee80211_event event = { 5737 .type = MLME_EVENT, 5738 .u.mlme.data = ASSOC_EVENT, 5739 }; 5740 struct ieee80211_prep_tx_info info = {}; 5741 struct cfg80211_rx_assoc_resp_data resp = { 5742 .uapsd_queues = -1, 5743 }; 5744 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5745 unsigned int link_id; 5746 5747 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5748 5749 if (!assoc_data) 5750 return; 5751 5752 parse_params.mode = 5753 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5754 5755 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5756 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5757 return; 5758 5759 /* 5760 * AssocResp and ReassocResp have identical structure, so process both 5761 * of them in this function. 5762 */ 5763 5764 if (len < 24 + 6) 5765 return; 5766 5767 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5768 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5769 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5770 if (assoc_data->s1g) 5771 elem_start = mgmt->u.s1g_assoc_resp.variable; 5772 else 5773 elem_start = mgmt->u.assoc_resp.variable; 5774 5775 /* 5776 * Note: this may not be perfect, AP might misbehave - if 5777 * anyone needs to rely on perfect complete notification 5778 * with the exact right subtype, then we need to track what 5779 * we actually transmitted. 5780 */ 5781 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5782 IEEE80211_STYPE_ASSOC_REQ; 5783 5784 if (assoc_data->fils_kek_len && 5785 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5786 return; 5787 5788 elem_len = len - (elem_start - (u8 *)mgmt); 5789 parse_params.start = elem_start; 5790 parse_params.len = elem_len; 5791 elems = ieee802_11_parse_elems_full(&parse_params); 5792 if (!elems) 5793 goto notify_driver; 5794 5795 if (elems->aid_resp) 5796 aid = le16_to_cpu(elems->aid_resp->aid); 5797 else if (assoc_data->s1g) 5798 aid = 0; /* TODO */ 5799 else 5800 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5801 5802 /* 5803 * The 5 MSB of the AID field are reserved 5804 * (802.11-2016 9.4.1.8 AID field) 5805 */ 5806 aid &= 0x7ff; 5807 5808 sdata_info(sdata, 5809 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5810 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5811 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5812 5813 ifmgd->broken_ap = false; 5814 5815 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5816 elems->timeout_int && 5817 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5818 u32 tu, ms; 5819 5820 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5821 le32_to_cpu(elems->timeout_int->value)); 5822 5823 tu = le32_to_cpu(elems->timeout_int->value); 5824 ms = tu * 1024 / 1000; 5825 sdata_info(sdata, 5826 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5827 assoc_data->ap_addr, tu, ms); 5828 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5829 assoc_data->timeout_started = true; 5830 assoc_data->comeback = true; 5831 if (ms > IEEE80211_ASSOC_TIMEOUT) 5832 run_again(sdata, assoc_data->timeout); 5833 goto notify_driver; 5834 } 5835 5836 if (status_code != WLAN_STATUS_SUCCESS) { 5837 sdata_info(sdata, "%pM denied association (code=%d)\n", 5838 assoc_data->ap_addr, status_code); 5839 event.u.mlme.status = MLME_DENIED; 5840 event.u.mlme.reason = status_code; 5841 drv_event_callback(sdata->local, sdata, &event); 5842 } else { 5843 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5844 sdata_info(sdata, 5845 "invalid AID value %d (out of range), turn off PS\n", 5846 aid); 5847 aid = 0; 5848 ifmgd->broken_ap = true; 5849 } 5850 5851 if (ieee80211_vif_is_mld(&sdata->vif)) { 5852 struct ieee80211_mle_basic_common_info *common; 5853 5854 if (!elems->ml_basic) { 5855 sdata_info(sdata, 5856 "MLO association with %pM but no (basic) multi-link element in response!\n", 5857 assoc_data->ap_addr); 5858 goto abandon_assoc; 5859 } 5860 5861 common = (void *)elems->ml_basic->variable; 5862 5863 if (memcmp(assoc_data->ap_addr, 5864 common->mld_mac_addr, ETH_ALEN)) { 5865 sdata_info(sdata, 5866 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5867 common->mld_mac_addr, 5868 assoc_data->ap_addr); 5869 goto abandon_assoc; 5870 } 5871 5872 sdata->vif.cfg.eml_cap = 5873 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5874 sdata->vif.cfg.eml_med_sync_delay = 5875 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5876 sdata->vif.cfg.mld_capa_op = 5877 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5878 } 5879 5880 sdata->vif.cfg.aid = aid; 5881 5882 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5883 elem_start, elem_len)) { 5884 /* oops -- internal error -- send timeout for now */ 5885 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5886 goto notify_driver; 5887 } 5888 event.u.mlme.status = MLME_SUCCESS; 5889 drv_event_callback(sdata->local, sdata, &event); 5890 sdata_info(sdata, "associated\n"); 5891 5892 info.success = 1; 5893 } 5894 5895 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5896 struct ieee80211_link_data *link; 5897 5898 if (!assoc_data->link[link_id].bss) 5899 continue; 5900 5901 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5902 ether_addr_copy(resp.links[link_id].addr, 5903 assoc_data->link[link_id].addr); 5904 resp.links[link_id].status = assoc_data->link[link_id].status; 5905 5906 link = sdata_dereference(sdata->link[link_id], sdata); 5907 if (!link) 5908 continue; 5909 5910 /* get uapsd queues configuration - same for all links */ 5911 resp.uapsd_queues = 0; 5912 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5913 if (link->tx_conf[ac].uapsd) 5914 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5915 } 5916 5917 if (ieee80211_vif_is_mld(&sdata->vif)) { 5918 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5919 resp.ap_mld_addr = ap_mld_addr; 5920 } 5921 5922 ieee80211_destroy_assoc_data(sdata, 5923 status_code == WLAN_STATUS_SUCCESS ? 5924 ASSOC_SUCCESS : 5925 ASSOC_REJECTED); 5926 5927 resp.buf = (u8 *)mgmt; 5928 resp.len = len; 5929 resp.req_ies = ifmgd->assoc_req_ies; 5930 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5931 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5932 notify_driver: 5933 drv_mgd_complete_tx(sdata->local, sdata, &info); 5934 kfree(elems); 5935 return; 5936 abandon_assoc: 5937 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5938 goto notify_driver; 5939 } 5940 5941 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5942 struct ieee80211_mgmt *mgmt, size_t len, 5943 struct ieee80211_rx_status *rx_status) 5944 { 5945 struct ieee80211_sub_if_data *sdata = link->sdata; 5946 struct ieee80211_local *local = sdata->local; 5947 struct ieee80211_bss *bss; 5948 struct ieee80211_channel *channel; 5949 5950 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5951 5952 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5953 ieee80211_rx_status_to_khz(rx_status)); 5954 if (!channel) 5955 return; 5956 5957 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5958 if (bss) { 5959 link->conf->beacon_rate = bss->beacon_rate; 5960 ieee80211_rx_bss_put(local, bss); 5961 } 5962 } 5963 5964 5965 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5966 struct sk_buff *skb) 5967 { 5968 struct ieee80211_sub_if_data *sdata = link->sdata; 5969 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5970 struct ieee80211_if_managed *ifmgd; 5971 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5972 struct ieee80211_channel *channel; 5973 size_t baselen, len = skb->len; 5974 5975 ifmgd = &sdata->u.mgd; 5976 5977 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5978 5979 /* 5980 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5981 * "If a 6 GHz AP receives a Probe Request frame and responds with 5982 * a Probe Response frame [..], the Address 1 field of the Probe 5983 * Response frame shall be set to the broadcast address [..]" 5984 * So, on 6GHz band we should also accept broadcast responses. 5985 */ 5986 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5987 rx_status->freq); 5988 if (!channel) 5989 return; 5990 5991 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5992 (channel->band != NL80211_BAND_6GHZ || 5993 !is_broadcast_ether_addr(mgmt->da))) 5994 return; /* ignore ProbeResp to foreign address */ 5995 5996 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5997 if (baselen > len) 5998 return; 5999 6000 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6001 6002 if (ifmgd->associated && 6003 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 6004 ieee80211_reset_ap_probe(sdata); 6005 } 6006 6007 /* 6008 * This is the canonical list of information elements we care about, 6009 * the filter code also gives us all changes to the Microsoft OUI 6010 * (00:50:F2) vendor IE which is used for WMM which we need to track, 6011 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 6012 * changes to requested client power. 6013 * 6014 * We implement beacon filtering in software since that means we can 6015 * avoid processing the frame here and in cfg80211, and userspace 6016 * will not be able to tell whether the hardware supports it or not. 6017 * 6018 * XXX: This list needs to be dynamic -- userspace needs to be able to 6019 * add items it requires. It also needs to be able to tell us to 6020 * look out for other vendor IEs. 6021 */ 6022 static const u64 care_about_ies = 6023 (1ULL << WLAN_EID_COUNTRY) | 6024 (1ULL << WLAN_EID_ERP_INFO) | 6025 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 6026 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 6027 (1ULL << WLAN_EID_HT_CAPABILITY) | 6028 (1ULL << WLAN_EID_HT_OPERATION) | 6029 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 6030 6031 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 6032 struct ieee80211_if_managed *ifmgd, 6033 struct ieee80211_bss_conf *bss_conf, 6034 struct ieee80211_local *local, 6035 struct ieee80211_rx_status *rx_status) 6036 { 6037 struct ieee80211_sub_if_data *sdata = link->sdata; 6038 6039 /* Track average RSSI from the Beacon frames of the current AP */ 6040 6041 if (!link->u.mgd.tracking_signal_avg) { 6042 link->u.mgd.tracking_signal_avg = true; 6043 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 6044 link->u.mgd.last_cqm_event_signal = 0; 6045 link->u.mgd.count_beacon_signal = 1; 6046 link->u.mgd.last_ave_beacon_signal = 0; 6047 } else { 6048 link->u.mgd.count_beacon_signal++; 6049 } 6050 6051 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 6052 -rx_status->signal); 6053 6054 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 6055 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6056 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6057 int last_sig = link->u.mgd.last_ave_beacon_signal; 6058 struct ieee80211_event event = { 6059 .type = RSSI_EVENT, 6060 }; 6061 6062 /* 6063 * if signal crosses either of the boundaries, invoke callback 6064 * with appropriate parameters 6065 */ 6066 if (sig > ifmgd->rssi_max_thold && 6067 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 6068 link->u.mgd.last_ave_beacon_signal = sig; 6069 event.u.rssi.data = RSSI_EVENT_HIGH; 6070 drv_event_callback(local, sdata, &event); 6071 } else if (sig < ifmgd->rssi_min_thold && 6072 (last_sig >= ifmgd->rssi_max_thold || 6073 last_sig == 0)) { 6074 link->u.mgd.last_ave_beacon_signal = sig; 6075 event.u.rssi.data = RSSI_EVENT_LOW; 6076 drv_event_callback(local, sdata, &event); 6077 } 6078 } 6079 6080 if (bss_conf->cqm_rssi_thold && 6081 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 6082 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 6083 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6084 int last_event = link->u.mgd.last_cqm_event_signal; 6085 int thold = bss_conf->cqm_rssi_thold; 6086 int hyst = bss_conf->cqm_rssi_hyst; 6087 6088 if (sig < thold && 6089 (last_event == 0 || sig < last_event - hyst)) { 6090 link->u.mgd.last_cqm_event_signal = sig; 6091 ieee80211_cqm_rssi_notify( 6092 &sdata->vif, 6093 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6094 sig, GFP_KERNEL); 6095 } else if (sig > thold && 6096 (last_event == 0 || sig > last_event + hyst)) { 6097 link->u.mgd.last_cqm_event_signal = sig; 6098 ieee80211_cqm_rssi_notify( 6099 &sdata->vif, 6100 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6101 sig, GFP_KERNEL); 6102 } 6103 } 6104 6105 if (bss_conf->cqm_rssi_low && 6106 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 6107 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 6108 int last_event = link->u.mgd.last_cqm_event_signal; 6109 int low = bss_conf->cqm_rssi_low; 6110 int high = bss_conf->cqm_rssi_high; 6111 6112 if (sig < low && 6113 (last_event == 0 || last_event >= low)) { 6114 link->u.mgd.last_cqm_event_signal = sig; 6115 ieee80211_cqm_rssi_notify( 6116 &sdata->vif, 6117 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 6118 sig, GFP_KERNEL); 6119 } else if (sig > high && 6120 (last_event == 0 || last_event <= high)) { 6121 link->u.mgd.last_cqm_event_signal = sig; 6122 ieee80211_cqm_rssi_notify( 6123 &sdata->vif, 6124 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 6125 sig, GFP_KERNEL); 6126 } 6127 } 6128 } 6129 6130 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 6131 struct cfg80211_bss *bss) 6132 { 6133 if (ether_addr_equal(tx_bssid, bss->bssid)) 6134 return true; 6135 if (!bss->transmitted_bss) 6136 return false; 6137 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 6138 } 6139 6140 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 6141 struct wiphy_work *work) 6142 { 6143 struct ieee80211_sub_if_data *sdata = 6144 container_of(work, struct ieee80211_sub_if_data, 6145 u.mgd.ml_reconf_work.work); 6146 u16 new_valid_links, new_active_links, new_dormant_links; 6147 int ret; 6148 6149 if (!sdata->u.mgd.removed_links) 6150 return; 6151 6152 sdata_info(sdata, 6153 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 6154 sdata->vif.valid_links, sdata->u.mgd.removed_links); 6155 6156 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 6157 if (new_valid_links == sdata->vif.valid_links) 6158 return; 6159 6160 if (!new_valid_links || 6161 !(new_valid_links & ~sdata->vif.dormant_links)) { 6162 sdata_info(sdata, "No valid links after reconfiguration\n"); 6163 ret = -EINVAL; 6164 goto out; 6165 } 6166 6167 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 6168 if (new_active_links != sdata->vif.active_links) { 6169 if (!new_active_links) 6170 new_active_links = 6171 BIT(ffs(new_valid_links & 6172 ~sdata->vif.dormant_links) - 1); 6173 6174 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 6175 if (ret) { 6176 sdata_info(sdata, 6177 "Failed setting active links\n"); 6178 goto out; 6179 } 6180 } 6181 6182 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 6183 6184 ret = ieee80211_vif_set_links(sdata, new_valid_links, 6185 new_dormant_links); 6186 if (ret) 6187 sdata_info(sdata, "Failed setting valid links\n"); 6188 6189 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 6190 6191 out: 6192 if (!ret) 6193 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 6194 else 6195 __ieee80211_disconnect(sdata); 6196 6197 sdata->u.mgd.removed_links = 0; 6198 } 6199 6200 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 6201 struct ieee802_11_elems *elems) 6202 { 6203 const struct element *sub; 6204 unsigned long removed_links = 0; 6205 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6206 u8 link_id; 6207 u32 delay; 6208 6209 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 6210 return; 6211 6212 /* Directly parse the sub elements as the common information doesn't 6213 * hold any useful information. 6214 */ 6215 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 6216 elems->ml_reconf_len) { 6217 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6218 u8 *pos = prof->variable; 6219 u16 control; 6220 6221 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 6222 continue; 6223 6224 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 6225 sub->datalen)) 6226 return; 6227 6228 control = le16_to_cpu(prof->control); 6229 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 6230 6231 removed_links |= BIT(link_id); 6232 6233 /* the MAC address should not be included, but handle it */ 6234 if (control & 6235 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 6236 pos += 6; 6237 6238 /* According to Draft P802.11be_D3.0, the control should 6239 * include the AP Removal Timer present. If the AP Removal Timer 6240 * is not present assume immediate removal. 6241 */ 6242 if (control & 6243 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 6244 link_removal_timeout[link_id] = get_unaligned_le16(pos); 6245 } 6246 6247 removed_links &= sdata->vif.valid_links; 6248 if (!removed_links) { 6249 /* In case the removal was cancelled, abort it */ 6250 if (sdata->u.mgd.removed_links) { 6251 sdata->u.mgd.removed_links = 0; 6252 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6253 &sdata->u.mgd.ml_reconf_work); 6254 } 6255 return; 6256 } 6257 6258 delay = 0; 6259 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 6260 struct ieee80211_bss_conf *link_conf = 6261 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 6262 u32 link_delay; 6263 6264 if (!link_conf) { 6265 removed_links &= ~BIT(link_id); 6266 continue; 6267 } 6268 6269 if (link_removal_timeout[link_id] < 1) 6270 link_delay = 0; 6271 else 6272 link_delay = link_conf->beacon_int * 6273 (link_removal_timeout[link_id] - 1); 6274 6275 if (!delay) 6276 delay = link_delay; 6277 else 6278 delay = min(delay, link_delay); 6279 } 6280 6281 sdata->u.mgd.removed_links = removed_links; 6282 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6283 &sdata->u.mgd.ml_reconf_work, 6284 TU_TO_JIFFIES(delay)); 6285 } 6286 6287 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 6288 u16 active_links, u16 dormant_links, 6289 u16 suspended_links) 6290 { 6291 u64 changed = 0; 6292 int ret; 6293 6294 if (!active_links) { 6295 ret = -EINVAL; 6296 goto out; 6297 } 6298 6299 /* If there is an active negotiated TTLM, it should be discarded by 6300 * the new negotiated/advertised TTLM. 6301 */ 6302 if (sdata->vif.neg_ttlm.valid) { 6303 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6304 sdata->vif.suspended_links = 0; 6305 changed = BSS_CHANGED_MLD_TTLM; 6306 } 6307 6308 if (sdata->vif.active_links != active_links) { 6309 /* usable links are affected when active_links are changed, 6310 * so notify the driver about the status change 6311 */ 6312 changed |= BSS_CHANGED_MLD_VALID_LINKS; 6313 active_links &= sdata->vif.active_links; 6314 if (!active_links) 6315 active_links = 6316 BIT(__ffs(sdata->vif.valid_links & 6317 ~dormant_links)); 6318 ret = ieee80211_set_active_links(&sdata->vif, active_links); 6319 if (ret) { 6320 sdata_info(sdata, "Failed to set TTLM active links\n"); 6321 goto out; 6322 } 6323 } 6324 6325 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6326 dormant_links); 6327 if (ret) { 6328 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 6329 goto out; 6330 } 6331 6332 sdata->vif.suspended_links = suspended_links; 6333 if (sdata->vif.suspended_links) 6334 changed |= BSS_CHANGED_MLD_TTLM; 6335 6336 ieee80211_vif_cfg_change_notify(sdata, changed); 6337 6338 out: 6339 if (ret) 6340 ieee80211_disconnect(&sdata->vif, false); 6341 6342 return ret; 6343 } 6344 6345 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 6346 struct wiphy_work *work) 6347 { 6348 u16 new_active_links, new_dormant_links; 6349 struct ieee80211_sub_if_data *sdata = 6350 container_of(work, struct ieee80211_sub_if_data, 6351 u.mgd.ttlm_work.work); 6352 6353 new_active_links = sdata->u.mgd.ttlm_info.map & 6354 sdata->vif.valid_links; 6355 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 6356 sdata->vif.valid_links; 6357 6358 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 6359 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 6360 0)) 6361 return; 6362 6363 sdata->u.mgd.ttlm_info.active = true; 6364 sdata->u.mgd.ttlm_info.switch_time = 0; 6365 } 6366 6367 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 6368 { 6369 if (bm_size == 1) 6370 return *data; 6371 else 6372 return get_unaligned_le16(data); 6373 } 6374 6375 static int 6376 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 6377 const struct ieee80211_ttlm_elem *ttlm, 6378 struct ieee80211_adv_ttlm_info *ttlm_info) 6379 { 6380 /* The element size was already validated in 6381 * ieee80211_tid_to_link_map_size_ok() 6382 */ 6383 u8 control, link_map_presence, map_size, tid; 6384 u8 *pos; 6385 6386 memset(ttlm_info, 0, sizeof(*ttlm_info)); 6387 pos = (void *)ttlm->optional; 6388 control = ttlm->control; 6389 6390 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 6391 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 6392 return 0; 6393 6394 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 6395 IEEE80211_TTLM_DIRECTION_BOTH) { 6396 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6397 return -EINVAL; 6398 } 6399 6400 link_map_presence = *pos; 6401 pos++; 6402 6403 ttlm_info->switch_time = get_unaligned_le16(pos); 6404 6405 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6406 * by 1. 6407 */ 6408 if (!ttlm_info->switch_time) 6409 ttlm_info->switch_time = 1; 6410 6411 pos += 2; 6412 6413 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6414 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6415 pos += 3; 6416 } 6417 6418 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6419 map_size = 1; 6420 else 6421 map_size = 2; 6422 6423 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6424 * not advertise a TID-to-link mapping that does not map all TIDs to the 6425 * same link set, reject frame if not all links have mapping 6426 */ 6427 if (link_map_presence != 0xff) { 6428 sdata_info(sdata, 6429 "Invalid advertised T2L mapping presence indicator\n"); 6430 return -EINVAL; 6431 } 6432 6433 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6434 if (!ttlm_info->map) { 6435 sdata_info(sdata, 6436 "Invalid advertised T2L map for TID 0\n"); 6437 return -EINVAL; 6438 } 6439 6440 pos += map_size; 6441 6442 for (tid = 1; tid < 8; tid++) { 6443 u16 map = ieee80211_get_ttlm(map_size, pos); 6444 6445 if (map != ttlm_info->map) { 6446 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6447 tid); 6448 return -EINVAL; 6449 } 6450 6451 pos += map_size; 6452 } 6453 return 0; 6454 } 6455 6456 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6457 struct ieee802_11_elems *elems, 6458 u64 beacon_ts) 6459 { 6460 u8 i; 6461 int ret; 6462 6463 if (!ieee80211_vif_is_mld(&sdata->vif)) 6464 return; 6465 6466 if (!elems->ttlm_num) { 6467 if (sdata->u.mgd.ttlm_info.switch_time) { 6468 /* if a planned TID-to-link mapping was cancelled - 6469 * abort it 6470 */ 6471 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6472 &sdata->u.mgd.ttlm_work); 6473 } else if (sdata->u.mgd.ttlm_info.active) { 6474 /* if no TID-to-link element, set to default mapping in 6475 * which all TIDs are mapped to all setup links 6476 */ 6477 ret = ieee80211_vif_set_links(sdata, 6478 sdata->vif.valid_links, 6479 0); 6480 if (ret) { 6481 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6482 return; 6483 } 6484 ieee80211_vif_cfg_change_notify(sdata, 6485 BSS_CHANGED_MLD_VALID_LINKS); 6486 } 6487 memset(&sdata->u.mgd.ttlm_info, 0, 6488 sizeof(sdata->u.mgd.ttlm_info)); 6489 return; 6490 } 6491 6492 for (i = 0; i < elems->ttlm_num; i++) { 6493 struct ieee80211_adv_ttlm_info ttlm_info; 6494 u32 res; 6495 6496 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6497 &ttlm_info); 6498 6499 if (res) { 6500 __ieee80211_disconnect(sdata); 6501 return; 6502 } 6503 6504 if (ttlm_info.switch_time) { 6505 u16 beacon_ts_tu, st_tu, delay; 6506 u32 delay_jiffies; 6507 u64 mask; 6508 6509 /* The t2l map switch time is indicated with a partial 6510 * TSF value (bits 10 to 25), get the partial beacon TS 6511 * as well, and calc the delay to the start time. 6512 */ 6513 mask = GENMASK_ULL(25, 10); 6514 beacon_ts_tu = (beacon_ts & mask) >> 10; 6515 st_tu = ttlm_info.switch_time; 6516 delay = st_tu - beacon_ts_tu; 6517 6518 /* 6519 * If the switch time is far in the future, then it 6520 * could also be the previous switch still being 6521 * announced. 6522 * We can simply ignore it for now, if it is a future 6523 * switch the AP will continue to announce it anyway. 6524 */ 6525 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6526 return; 6527 6528 delay_jiffies = TU_TO_JIFFIES(delay); 6529 6530 /* Link switching can take time, so schedule it 6531 * 100ms before to be ready on time 6532 */ 6533 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6534 delay_jiffies -= 6535 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6536 else 6537 delay_jiffies = 0; 6538 6539 sdata->u.mgd.ttlm_info = ttlm_info; 6540 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6541 &sdata->u.mgd.ttlm_work); 6542 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6543 &sdata->u.mgd.ttlm_work, 6544 delay_jiffies); 6545 return; 6546 } 6547 } 6548 } 6549 6550 static void 6551 ieee80211_mgd_check_cross_link_csa(struct ieee80211_sub_if_data *sdata, 6552 int reporting_link_id, 6553 struct ieee802_11_elems *elems) 6554 { 6555 const struct element *sta_profiles[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6556 ssize_t sta_profiles_len[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 6557 const struct element *sub; 6558 const u8 *subelems; 6559 size_t subelems_len; 6560 u8 common_size; 6561 int link_id; 6562 6563 if (!ieee80211_mle_size_ok((u8 *)elems->ml_basic, elems->ml_basic_len)) 6564 return; 6565 6566 common_size = ieee80211_mle_common_size((u8 *)elems->ml_basic); 6567 subelems = (u8 *)elems->ml_basic + common_size; 6568 subelems_len = elems->ml_basic_len - common_size; 6569 6570 for_each_element_id(sub, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE, 6571 subelems, subelems_len) { 6572 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 6573 struct ieee80211_link_data *link; 6574 ssize_t len; 6575 6576 if (!ieee80211_mle_basic_sta_prof_size_ok(sub->data, 6577 sub->datalen)) 6578 continue; 6579 6580 link_id = le16_get_bits(prof->control, 6581 IEEE80211_MLE_STA_CONTROL_LINK_ID); 6582 /* need a valid link ID, but also not our own, both AP bugs */ 6583 if (link_id == reporting_link_id || 6584 link_id >= IEEE80211_MLD_MAX_NUM_LINKS) 6585 continue; 6586 6587 link = sdata_dereference(sdata->link[link_id], sdata); 6588 if (!link) 6589 continue; 6590 6591 len = cfg80211_defragment_element(sub, subelems, subelems_len, 6592 NULL, 0, 6593 IEEE80211_MLE_SUBELEM_FRAGMENT); 6594 if (WARN_ON(len < 0)) 6595 continue; 6596 6597 sta_profiles[link_id] = sub; 6598 sta_profiles_len[link_id] = len; 6599 } 6600 6601 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 6602 struct ieee80211_mle_per_sta_profile *prof; 6603 struct ieee802_11_elems *prof_elems; 6604 struct ieee80211_link_data *link; 6605 ssize_t len; 6606 6607 if (link_id == reporting_link_id) 6608 continue; 6609 6610 link = sdata_dereference(sdata->link[link_id], sdata); 6611 if (!link) 6612 continue; 6613 6614 if (!sta_profiles[link_id]) { 6615 prof_elems = NULL; 6616 goto handle; 6617 } 6618 6619 /* we can defragment in-place, won't use the buffer again */ 6620 len = cfg80211_defragment_element(sta_profiles[link_id], 6621 subelems, subelems_len, 6622 (void *)sta_profiles[link_id], 6623 sta_profiles_len[link_id], 6624 IEEE80211_MLE_SUBELEM_FRAGMENT); 6625 if (WARN_ON(len != sta_profiles_len[link_id])) 6626 continue; 6627 6628 prof = (void *)sta_profiles[link_id]; 6629 prof_elems = ieee802_11_parse_elems(prof->variable + 6630 (prof->sta_info_len - 1), 6631 len - 6632 (prof->sta_info_len - 1), 6633 false, NULL); 6634 6635 /* memory allocation failed - let's hope that's transient */ 6636 if (!prof_elems) 6637 continue; 6638 6639 handle: 6640 /* 6641 * FIXME: the timings here are obviously incorrect, 6642 * but only older Intel drivers seem to care, and 6643 * those don't have MLO. If you really need this, 6644 * the problem is having to calculate it with the 6645 * TSF offset etc. The device_timestamp is still 6646 * correct, of course. 6647 */ 6648 ieee80211_sta_process_chanswitch(link, 0, 0, elems, prof_elems, 6649 IEEE80211_CSA_SOURCE_OTHER_LINK); 6650 kfree(prof_elems); 6651 } 6652 } 6653 6654 static bool ieee80211_mgd_ssid_mismatch(struct ieee80211_sub_if_data *sdata, 6655 const struct ieee802_11_elems *elems) 6656 { 6657 struct ieee80211_vif_cfg *cfg = &sdata->vif.cfg; 6658 static u8 zero_ssid[IEEE80211_MAX_SSID_LEN]; 6659 6660 if (!elems->ssid) 6661 return false; 6662 6663 /* hidden SSID: zero length */ 6664 if (elems->ssid_len == 0) 6665 return false; 6666 6667 if (elems->ssid_len != cfg->ssid_len) 6668 return true; 6669 6670 /* hidden SSID: zeroed out */ 6671 if (!memcmp(elems->ssid, zero_ssid, elems->ssid_len)) 6672 return false; 6673 6674 return memcmp(elems->ssid, cfg->ssid, cfg->ssid_len); 6675 } 6676 6677 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6678 struct ieee80211_hdr *hdr, size_t len, 6679 struct ieee80211_rx_status *rx_status) 6680 { 6681 struct ieee80211_sub_if_data *sdata = link->sdata; 6682 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6683 struct ieee80211_bss_conf *bss_conf = link->conf; 6684 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6685 struct ieee80211_mgmt *mgmt = (void *) hdr; 6686 size_t baselen; 6687 struct ieee802_11_elems *elems; 6688 struct ieee80211_local *local = sdata->local; 6689 struct ieee80211_chanctx_conf *chanctx_conf; 6690 struct ieee80211_supported_band *sband; 6691 struct ieee80211_channel *chan; 6692 struct link_sta_info *link_sta; 6693 struct sta_info *sta; 6694 u64 changed = 0; 6695 bool erp_valid; 6696 u8 erp_value = 0; 6697 u32 ncrc = 0; 6698 u8 *bssid, *variable = mgmt->u.beacon.variable; 6699 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6700 struct ieee80211_elems_parse_params parse_params = { 6701 .mode = link->u.mgd.conn.mode, 6702 .link_id = -1, 6703 .from_ap = true, 6704 }; 6705 6706 lockdep_assert_wiphy(local->hw.wiphy); 6707 6708 /* Process beacon from the current BSS */ 6709 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6710 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6711 struct ieee80211_ext *ext = (void *) mgmt; 6712 6713 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6714 variable = ext->u.s1g_short_beacon.variable; 6715 else 6716 variable = ext->u.s1g_beacon.variable; 6717 } 6718 6719 baselen = (u8 *) variable - (u8 *) mgmt; 6720 if (baselen > len) 6721 return; 6722 6723 parse_params.start = variable; 6724 parse_params.len = len - baselen; 6725 6726 rcu_read_lock(); 6727 chanctx_conf = rcu_dereference(bss_conf->chanctx_conf); 6728 if (!chanctx_conf) { 6729 rcu_read_unlock(); 6730 return; 6731 } 6732 6733 if (ieee80211_rx_status_to_khz(rx_status) != 6734 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6735 rcu_read_unlock(); 6736 return; 6737 } 6738 chan = chanctx_conf->def.chan; 6739 rcu_read_unlock(); 6740 6741 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6742 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6743 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6744 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6745 elems = ieee802_11_parse_elems_full(&parse_params); 6746 if (!elems) 6747 return; 6748 6749 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6750 6751 if (elems->dtim_period) 6752 link->u.mgd.dtim_period = elems->dtim_period; 6753 link->u.mgd.have_beacon = true; 6754 ifmgd->assoc_data->need_beacon = false; 6755 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6756 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6757 bss_conf->sync_tsf = 6758 le64_to_cpu(mgmt->u.beacon.timestamp); 6759 bss_conf->sync_device_ts = 6760 rx_status->device_timestamp; 6761 bss_conf->sync_dtim_count = elems->dtim_count; 6762 } 6763 6764 if (elems->mbssid_config_ie) 6765 bss_conf->profile_periodicity = 6766 elems->mbssid_config_ie->profile_periodicity; 6767 else 6768 bss_conf->profile_periodicity = 0; 6769 6770 if (elems->ext_capab_len >= 11 && 6771 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6772 bss_conf->ema_ap = true; 6773 else 6774 bss_conf->ema_ap = false; 6775 6776 /* continue assoc process */ 6777 ifmgd->assoc_data->timeout = jiffies; 6778 ifmgd->assoc_data->timeout_started = true; 6779 run_again(sdata, ifmgd->assoc_data->timeout); 6780 kfree(elems); 6781 return; 6782 } 6783 6784 if (!ifmgd->associated || 6785 !ieee80211_rx_our_beacon(bssid, bss_conf->bss)) 6786 return; 6787 bssid = link->u.mgd.bssid; 6788 6789 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6790 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6791 local, rx_status); 6792 6793 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6794 mlme_dbg_ratelimited(sdata, 6795 "cancelling AP probe due to a received beacon\n"); 6796 ieee80211_reset_ap_probe(sdata); 6797 } 6798 6799 /* 6800 * Push the beacon loss detection into the future since 6801 * we are processing a beacon from the AP just now. 6802 */ 6803 ieee80211_sta_reset_beacon_monitor(sdata); 6804 6805 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6806 * element (which carries the beacon interval). Don't forget to add a 6807 * bit to care_about_ies[] above if mac80211 is interested in a 6808 * changing S1G element. 6809 */ 6810 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6811 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6812 parse_params.bss = bss_conf->bss; 6813 parse_params.filter = care_about_ies; 6814 parse_params.crc = ncrc; 6815 elems = ieee802_11_parse_elems_full(&parse_params); 6816 if (!elems) 6817 return; 6818 6819 if (rx_status->flag & RX_FLAG_DECRYPTED && 6820 ieee80211_mgd_ssid_mismatch(sdata, elems)) { 6821 sdata_info(sdata, "SSID mismatch for AP %pM, disconnect\n", 6822 sdata->vif.cfg.ap_addr); 6823 __ieee80211_disconnect(sdata); 6824 return; 6825 } 6826 6827 ncrc = elems->crc; 6828 6829 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6830 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6831 if (local->hw.conf.dynamic_ps_timeout > 0) { 6832 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6833 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6834 ieee80211_hw_config(local, 6835 IEEE80211_CONF_CHANGE_PS); 6836 } 6837 ieee80211_send_nullfunc(local, sdata, false); 6838 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6839 local->pspolling = true; 6840 6841 /* 6842 * Here is assumed that the driver will be 6843 * able to send ps-poll frame and receive a 6844 * response even though power save mode is 6845 * enabled, but some drivers might require 6846 * to disable power save here. This needs 6847 * to be investigated. 6848 */ 6849 ieee80211_send_pspoll(local, sdata); 6850 } 6851 } 6852 6853 if (sdata->vif.p2p || 6854 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6855 struct ieee80211_p2p_noa_attr noa = {}; 6856 int ret; 6857 6858 ret = cfg80211_get_p2p_attr(variable, 6859 len - baselen, 6860 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6861 (u8 *) &noa, sizeof(noa)); 6862 if (ret >= 2) { 6863 if (link->u.mgd.p2p_noa_index != noa.index) { 6864 /* valid noa_attr and index changed */ 6865 link->u.mgd.p2p_noa_index = noa.index; 6866 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6867 changed |= BSS_CHANGED_P2P_PS; 6868 /* 6869 * make sure we update all information, the CRC 6870 * mechanism doesn't look at P2P attributes. 6871 */ 6872 link->u.mgd.beacon_crc_valid = false; 6873 } 6874 } else if (link->u.mgd.p2p_noa_index != -1) { 6875 /* noa_attr not found and we had valid noa_attr before */ 6876 link->u.mgd.p2p_noa_index = -1; 6877 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6878 changed |= BSS_CHANGED_P2P_PS; 6879 link->u.mgd.beacon_crc_valid = false; 6880 } 6881 } 6882 6883 /* 6884 * Update beacon timing and dtim count on every beacon appearance. This 6885 * will allow the driver to use the most updated values. Do it before 6886 * comparing this one with last received beacon. 6887 * IMPORTANT: These parameters would possibly be out of sync by the time 6888 * the driver will use them. The synchronized view is currently 6889 * guaranteed only in certain callbacks. 6890 */ 6891 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6892 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6893 bss_conf->sync_tsf = 6894 le64_to_cpu(mgmt->u.beacon.timestamp); 6895 bss_conf->sync_device_ts = 6896 rx_status->device_timestamp; 6897 bss_conf->sync_dtim_count = elems->dtim_count; 6898 } 6899 6900 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6901 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6902 goto free; 6903 link->u.mgd.beacon_crc = ncrc; 6904 link->u.mgd.beacon_crc_valid = true; 6905 6906 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6907 6908 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6909 rx_status->device_timestamp, 6910 elems, elems, 6911 IEEE80211_CSA_SOURCE_BEACON); 6912 6913 /* note that after this elems->ml_basic can no longer be used fully */ 6914 ieee80211_mgd_check_cross_link_csa(sdata, rx_status->link_id, elems); 6915 6916 if (!link->u.mgd.disable_wmm_tracking && 6917 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6918 elems->wmm_param_len, 6919 elems->mu_edca_param_set)) 6920 changed |= BSS_CHANGED_QOS; 6921 6922 /* 6923 * If we haven't had a beacon before, tell the driver about the 6924 * DTIM period (and beacon timing if desired) now. 6925 */ 6926 if (!link->u.mgd.have_beacon) { 6927 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6928 bss_conf->dtim_period = elems->dtim_period ?: 1; 6929 6930 changed |= BSS_CHANGED_BEACON_INFO; 6931 link->u.mgd.have_beacon = true; 6932 6933 ieee80211_recalc_ps(local); 6934 6935 ieee80211_recalc_ps_vif(sdata); 6936 } 6937 6938 if (elems->erp_info) { 6939 erp_valid = true; 6940 erp_value = elems->erp_info[0]; 6941 } else { 6942 erp_valid = false; 6943 } 6944 6945 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6946 changed |= ieee80211_handle_bss_capability(link, 6947 le16_to_cpu(mgmt->u.beacon.capab_info), 6948 erp_valid, erp_value); 6949 6950 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6951 if (WARN_ON(!sta)) { 6952 goto free; 6953 } 6954 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6955 lockdep_is_held(&local->hw.wiphy->mtx)); 6956 if (WARN_ON(!link_sta)) { 6957 goto free; 6958 } 6959 6960 if (WARN_ON(!bss_conf->chanreq.oper.chan)) 6961 goto free; 6962 6963 sband = local->hw.wiphy->bands[bss_conf->chanreq.oper.chan->band]; 6964 6965 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6966 6967 if (ieee80211_config_bw(link, elems, true, &changed)) { 6968 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6969 WLAN_REASON_DEAUTH_LEAVING, 6970 true, deauth_buf); 6971 ieee80211_report_disconnect(sdata, deauth_buf, 6972 sizeof(deauth_buf), true, 6973 WLAN_REASON_DEAUTH_LEAVING, 6974 false); 6975 goto free; 6976 } 6977 6978 if (elems->opmode_notif) 6979 ieee80211_vht_handle_opmode(sdata, link_sta, 6980 *elems->opmode_notif, 6981 rx_status->band); 6982 6983 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6984 elems->country_elem, 6985 elems->country_elem_len, 6986 elems->pwr_constr_elem, 6987 elems->cisco_dtpc_elem); 6988 6989 ieee80211_ml_reconfiguration(sdata, elems); 6990 ieee80211_process_adv_ttlm(sdata, elems, 6991 le64_to_cpu(mgmt->u.beacon.timestamp)); 6992 6993 ieee80211_link_info_change_notify(sdata, link, changed); 6994 free: 6995 kfree(elems); 6996 } 6997 6998 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6999 struct ieee80211_neg_ttlm neg_ttlm) 7000 { 7001 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 7002 u8 i; 7003 7004 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 7005 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 7006 7007 /* If there is an active TTLM, unset previously suspended links */ 7008 if (sdata->vif.neg_ttlm.valid) 7009 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 7010 7011 /* exclude links that are already disabled by advertised TTLM */ 7012 new_active_links = 7013 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 7014 new_suspended_links = 7015 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 7016 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 7017 if (ieee80211_ttlm_set_links(sdata, new_active_links, 7018 new_dormant_links, new_suspended_links)) 7019 return; 7020 7021 sdata->vif.neg_ttlm = neg_ttlm; 7022 sdata->vif.neg_ttlm.valid = true; 7023 } 7024 7025 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 7026 struct wiphy_work *work) 7027 { 7028 struct ieee80211_sub_if_data *sdata = 7029 container_of(work, struct ieee80211_sub_if_data, 7030 u.mgd.neg_ttlm_timeout_work.work); 7031 7032 sdata_info(sdata, 7033 "No negotiated TTLM response from AP, disconnecting.\n"); 7034 7035 __ieee80211_disconnect(sdata); 7036 } 7037 7038 static void 7039 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 7040 struct ieee80211_neg_ttlm *neg_ttlm) 7041 { 7042 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 7043 7044 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 7045 sizeof(neg_ttlm->downlink))) { 7046 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 7047 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 7048 } else { 7049 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 7050 } 7051 7052 for (i = 0; i < ARRAY_SIZE(direction); i++) { 7053 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 7054 __le16 map; 7055 7056 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 7057 7058 pos = skb_put(skb, len + 2); 7059 *pos++ = WLAN_EID_EXTENSION; 7060 len_pos = pos++; 7061 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 7062 *pos++ = direction[i]; 7063 map_ind_pos = pos++; 7064 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7065 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 7066 cpu_to_le16(neg_ttlm->uplink[tid]) : 7067 cpu_to_le16(neg_ttlm->downlink[tid]); 7068 if (!map) 7069 continue; 7070 7071 len += 2; 7072 map_ind |= BIT(tid); 7073 skb_put_data(skb, &map, sizeof(map)); 7074 } 7075 7076 *map_ind_pos = map_ind; 7077 *len_pos = len; 7078 7079 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 7080 break; 7081 } 7082 } 7083 7084 static void 7085 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7086 struct ieee80211_neg_ttlm *neg_ttlm, 7087 u8 dialog_token) 7088 { 7089 struct ieee80211_local *local = sdata->local; 7090 struct ieee80211_mgmt *mgmt; 7091 struct sk_buff *skb; 7092 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 7093 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7094 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7095 7096 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7097 if (!skb) 7098 return; 7099 7100 skb_reserve(skb, local->tx_headroom); 7101 mgmt = skb_put_zero(skb, hdr_len); 7102 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7103 IEEE80211_STYPE_ACTION); 7104 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7105 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7106 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7107 7108 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7109 mgmt->u.action.u.ttlm_req.action_code = 7110 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 7111 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 7112 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7113 ieee80211_tx_skb(sdata, skb); 7114 } 7115 7116 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7117 struct cfg80211_ttlm_params *params) 7118 { 7119 struct ieee80211_neg_ttlm neg_ttlm = {}; 7120 u8 i; 7121 7122 if (!ieee80211_vif_is_mld(&sdata->vif) || 7123 !(sdata->vif.cfg.mld_capa_op & 7124 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 7125 return -EINVAL; 7126 7127 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7128 if ((params->dlink[i] & ~sdata->vif.valid_links) || 7129 (params->ulink[i] & ~sdata->vif.valid_links)) 7130 return -EINVAL; 7131 7132 neg_ttlm.downlink[i] = params->dlink[i]; 7133 neg_ttlm.uplink[i] = params->ulink[i]; 7134 } 7135 7136 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 7137 NEG_TTLM_RES_ACCEPT) 7138 return -EINVAL; 7139 7140 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7141 sdata->u.mgd.dialog_token_alloc++; 7142 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 7143 sdata->u.mgd.dialog_token_alloc); 7144 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7145 &sdata->u.mgd.neg_ttlm_timeout_work); 7146 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 7147 &sdata->u.mgd.neg_ttlm_timeout_work, 7148 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 7149 return 0; 7150 } 7151 7152 static void 7153 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7154 enum ieee80211_neg_ttlm_res ttlm_res, 7155 u8 dialog_token, 7156 struct ieee80211_neg_ttlm *neg_ttlm) 7157 { 7158 struct ieee80211_local *local = sdata->local; 7159 struct ieee80211_mgmt *mgmt; 7160 struct sk_buff *skb; 7161 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 7162 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 7163 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 7164 7165 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 7166 if (!skb) 7167 return; 7168 7169 skb_reserve(skb, local->tx_headroom); 7170 mgmt = skb_put_zero(skb, hdr_len); 7171 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7172 IEEE80211_STYPE_ACTION); 7173 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7174 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7175 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7176 7177 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7178 mgmt->u.action.u.ttlm_res.action_code = 7179 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 7180 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 7181 switch (ttlm_res) { 7182 default: 7183 WARN_ON(1); 7184 fallthrough; 7185 case NEG_TTLM_RES_REJECT: 7186 mgmt->u.action.u.ttlm_res.status_code = 7187 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 7188 break; 7189 case NEG_TTLM_RES_ACCEPT: 7190 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 7191 break; 7192 case NEG_TTLM_RES_SUGGEST_PREFERRED: 7193 mgmt->u.action.u.ttlm_res.status_code = 7194 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 7195 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 7196 break; 7197 } 7198 7199 ieee80211_tx_skb(sdata, skb); 7200 } 7201 7202 static int 7203 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 7204 const struct ieee80211_ttlm_elem *ttlm, 7205 struct ieee80211_neg_ttlm *neg_ttlm, 7206 u8 *direction) 7207 { 7208 u8 control, link_map_presence, map_size, tid; 7209 u8 *pos; 7210 7211 /* The element size was already validated in 7212 * ieee80211_tid_to_link_map_size_ok() 7213 */ 7214 pos = (void *)ttlm->optional; 7215 7216 control = ttlm->control; 7217 7218 /* mapping switch time and expected duration fields are not expected 7219 * in case of negotiated TTLM 7220 */ 7221 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 7222 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 7223 mlme_dbg(sdata, 7224 "Invalid TTLM element in negotiated TTLM request\n"); 7225 return -EINVAL; 7226 } 7227 7228 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 7229 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7230 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 7231 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 7232 } 7233 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 7234 return 0; 7235 } 7236 7237 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 7238 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 7239 *direction != IEEE80211_TTLM_DIRECTION_UP && 7240 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 7241 return -EINVAL; 7242 7243 link_map_presence = *pos; 7244 pos++; 7245 7246 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 7247 map_size = 1; 7248 else 7249 map_size = 2; 7250 7251 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 7252 u16 map; 7253 7254 if (link_map_presence & BIT(tid)) { 7255 map = ieee80211_get_ttlm(map_size, pos); 7256 if (!map) { 7257 mlme_dbg(sdata, 7258 "No active links for TID %d", tid); 7259 return -EINVAL; 7260 } 7261 } else { 7262 map = 0; 7263 } 7264 7265 switch (*direction) { 7266 case IEEE80211_TTLM_DIRECTION_BOTH: 7267 neg_ttlm->downlink[tid] = map; 7268 neg_ttlm->uplink[tid] = map; 7269 break; 7270 case IEEE80211_TTLM_DIRECTION_DOWN: 7271 neg_ttlm->downlink[tid] = map; 7272 break; 7273 case IEEE80211_TTLM_DIRECTION_UP: 7274 neg_ttlm->uplink[tid] = map; 7275 break; 7276 default: 7277 return -EINVAL; 7278 } 7279 pos += map_size; 7280 } 7281 return 0; 7282 } 7283 7284 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 7285 struct ieee80211_mgmt *mgmt, size_t len) 7286 { 7287 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 7288 size_t ies_len; 7289 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 7290 struct ieee802_11_elems *elems = NULL; 7291 struct ieee80211_neg_ttlm neg_ttlm = {}; 7292 7293 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 7294 7295 if (!ieee80211_vif_is_mld(&sdata->vif)) 7296 return; 7297 7298 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 7299 ies_len = len - offsetof(struct ieee80211_mgmt, 7300 u.action.u.ttlm_req.variable); 7301 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 7302 ies_len, true, NULL); 7303 if (!elems) { 7304 ttlm_res = NEG_TTLM_RES_REJECT; 7305 goto out; 7306 } 7307 7308 for (i = 0; i < elems->ttlm_num; i++) { 7309 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 7310 &neg_ttlm, &direction[i]) || 7311 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 7312 elems->ttlm_num != 1)) { 7313 ttlm_res = NEG_TTLM_RES_REJECT; 7314 goto out; 7315 } 7316 } 7317 7318 if (!elems->ttlm_num || 7319 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 7320 ttlm_res = NEG_TTLM_RES_REJECT; 7321 goto out; 7322 } 7323 7324 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 7325 if ((neg_ttlm.downlink[i] && 7326 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 7327 (neg_ttlm.uplink[i] && 7328 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 7329 ttlm_res = NEG_TTLM_RES_REJECT; 7330 goto out; 7331 } 7332 } 7333 7334 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 7335 7336 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 7337 goto out; 7338 7339 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 7340 out: 7341 kfree(elems); 7342 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 7343 } 7344 7345 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 7346 struct ieee80211_mgmt *mgmt, size_t len) 7347 { 7348 if (!ieee80211_vif_is_mld(&sdata->vif) || 7349 mgmt->u.action.u.ttlm_req.dialog_token != 7350 sdata->u.mgd.dialog_token_alloc) 7351 return; 7352 7353 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 7354 &sdata->u.mgd.neg_ttlm_timeout_work); 7355 7356 /* MLD station sends a TID to link mapping request, mainly to handle 7357 * BTM (BSS transition management) request, in which case it needs to 7358 * restrict the active links set. 7359 * In this case it's not expected that the MLD AP will reject the 7360 * negotiated TTLM request. 7361 * This can be better implemented in the future, to handle request 7362 * rejections. 7363 */ 7364 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 7365 __ieee80211_disconnect(sdata); 7366 } 7367 7368 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 7369 struct wiphy_work *work) 7370 { 7371 u16 new_dormant_links; 7372 struct ieee80211_sub_if_data *sdata = 7373 container_of(work, struct ieee80211_sub_if_data, 7374 u.mgd.teardown_ttlm_work); 7375 7376 if (!sdata->vif.neg_ttlm.valid) 7377 return; 7378 7379 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 7380 new_dormant_links = 7381 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 7382 sdata->vif.suspended_links = 0; 7383 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 7384 new_dormant_links); 7385 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 7386 BSS_CHANGED_MLD_VALID_LINKS); 7387 } 7388 7389 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 7390 { 7391 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 7392 struct ieee80211_local *local = sdata->local; 7393 struct ieee80211_mgmt *mgmt; 7394 struct sk_buff *skb; 7395 int frame_len = offsetofend(struct ieee80211_mgmt, 7396 u.action.u.ttlm_tear_down); 7397 struct ieee80211_tx_info *info; 7398 7399 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 7400 if (!skb) 7401 return; 7402 7403 skb_reserve(skb, local->hw.extra_tx_headroom); 7404 mgmt = skb_put_zero(skb, frame_len); 7405 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 7406 IEEE80211_STYPE_ACTION); 7407 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 7408 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 7409 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7410 7411 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 7412 mgmt->u.action.u.ttlm_tear_down.action_code = 7413 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 7414 7415 info = IEEE80211_SKB_CB(skb); 7416 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 7417 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 7418 ieee80211_tx_skb(sdata, skb); 7419 } 7420 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 7421 7422 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 7423 struct sk_buff *skb) 7424 { 7425 struct ieee80211_link_data *link = &sdata->deflink; 7426 struct ieee80211_rx_status *rx_status; 7427 struct ieee80211_hdr *hdr; 7428 u16 fc; 7429 7430 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7431 7432 rx_status = (struct ieee80211_rx_status *) skb->cb; 7433 hdr = (struct ieee80211_hdr *) skb->data; 7434 fc = le16_to_cpu(hdr->frame_control); 7435 7436 switch (fc & IEEE80211_FCTL_STYPE) { 7437 case IEEE80211_STYPE_S1G_BEACON: 7438 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 7439 break; 7440 } 7441 } 7442 7443 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 7444 struct sk_buff *skb) 7445 { 7446 struct ieee80211_link_data *link = &sdata->deflink; 7447 struct ieee80211_rx_status *rx_status; 7448 struct ieee802_11_elems *elems; 7449 struct ieee80211_mgmt *mgmt; 7450 u16 fc; 7451 int ies_len; 7452 7453 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7454 7455 rx_status = (struct ieee80211_rx_status *) skb->cb; 7456 mgmt = (struct ieee80211_mgmt *) skb->data; 7457 fc = le16_to_cpu(mgmt->frame_control); 7458 7459 if (rx_status->link_valid) { 7460 link = sdata_dereference(sdata->link[rx_status->link_id], 7461 sdata); 7462 if (!link) 7463 return; 7464 } 7465 7466 switch (fc & IEEE80211_FCTL_STYPE) { 7467 case IEEE80211_STYPE_BEACON: 7468 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 7469 skb->len, rx_status); 7470 break; 7471 case IEEE80211_STYPE_PROBE_RESP: 7472 ieee80211_rx_mgmt_probe_resp(link, skb); 7473 break; 7474 case IEEE80211_STYPE_AUTH: 7475 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 7476 break; 7477 case IEEE80211_STYPE_DEAUTH: 7478 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 7479 break; 7480 case IEEE80211_STYPE_DISASSOC: 7481 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 7482 break; 7483 case IEEE80211_STYPE_ASSOC_RESP: 7484 case IEEE80211_STYPE_REASSOC_RESP: 7485 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 7486 break; 7487 case IEEE80211_STYPE_ACTION: 7488 if (!sdata->u.mgd.associated || 7489 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 7490 break; 7491 7492 switch (mgmt->u.action.category) { 7493 case WLAN_CATEGORY_SPECTRUM_MGMT: 7494 ies_len = skb->len - 7495 offsetof(struct ieee80211_mgmt, 7496 u.action.u.chan_switch.variable); 7497 7498 if (ies_len < 0) 7499 break; 7500 7501 /* CSA IE cannot be overridden, no need for BSSID */ 7502 elems = ieee802_11_parse_elems( 7503 mgmt->u.action.u.chan_switch.variable, 7504 ies_len, true, NULL); 7505 7506 if (elems && !elems->parse_error) { 7507 enum ieee80211_csa_source src = 7508 IEEE80211_CSA_SOURCE_PROT_ACTION; 7509 7510 ieee80211_sta_process_chanswitch(link, 7511 rx_status->mactime, 7512 rx_status->device_timestamp, 7513 elems, elems, 7514 src); 7515 } 7516 kfree(elems); 7517 break; 7518 case WLAN_CATEGORY_PUBLIC: 7519 case WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION: 7520 ies_len = skb->len - 7521 offsetof(struct ieee80211_mgmt, 7522 u.action.u.ext_chan_switch.variable); 7523 7524 if (ies_len < 0) 7525 break; 7526 7527 /* 7528 * extended CSA IE can't be overridden, no need for 7529 * BSSID 7530 */ 7531 elems = ieee802_11_parse_elems( 7532 mgmt->u.action.u.ext_chan_switch.variable, 7533 ies_len, true, NULL); 7534 7535 if (elems && !elems->parse_error) { 7536 enum ieee80211_csa_source src; 7537 7538 if (mgmt->u.action.category == 7539 WLAN_CATEGORY_PROTECTED_DUAL_OF_ACTION) 7540 src = IEEE80211_CSA_SOURCE_PROT_ACTION; 7541 else 7542 src = IEEE80211_CSA_SOURCE_UNPROT_ACTION; 7543 7544 /* for the handling code pretend it was an IE */ 7545 elems->ext_chansw_ie = 7546 &mgmt->u.action.u.ext_chan_switch.data; 7547 7548 ieee80211_sta_process_chanswitch(link, 7549 rx_status->mactime, 7550 rx_status->device_timestamp, 7551 elems, elems, 7552 src); 7553 } 7554 7555 kfree(elems); 7556 break; 7557 } 7558 break; 7559 } 7560 } 7561 7562 static void ieee80211_sta_timer(struct timer_list *t) 7563 { 7564 struct ieee80211_sub_if_data *sdata = 7565 from_timer(sdata, t, u.mgd.timer); 7566 7567 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7568 } 7569 7570 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7571 u8 reason, bool tx) 7572 { 7573 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7574 7575 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7576 tx, frame_buf); 7577 7578 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7579 reason, false); 7580 } 7581 7582 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7583 { 7584 struct ieee80211_local *local = sdata->local; 7585 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7586 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7587 u32 tx_flags = 0; 7588 u16 trans = 1; 7589 u16 status = 0; 7590 struct ieee80211_prep_tx_info info = { 7591 .subtype = IEEE80211_STYPE_AUTH, 7592 }; 7593 7594 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7595 7596 if (WARN_ON_ONCE(!auth_data)) 7597 return -EINVAL; 7598 7599 auth_data->tries++; 7600 7601 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7602 sdata_info(sdata, "authentication with %pM timed out\n", 7603 auth_data->ap_addr); 7604 7605 /* 7606 * Most likely AP is not in the range so remove the 7607 * bss struct for that AP. 7608 */ 7609 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7610 7611 return -ETIMEDOUT; 7612 } 7613 7614 if (auth_data->algorithm == WLAN_AUTH_SAE) 7615 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7616 7617 info.link_id = auth_data->link_id; 7618 drv_mgd_prepare_tx(local, sdata, &info); 7619 7620 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7621 auth_data->ap_addr, auth_data->tries, 7622 IEEE80211_AUTH_MAX_TRIES); 7623 7624 auth_data->expected_transaction = 2; 7625 7626 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7627 trans = auth_data->sae_trans; 7628 status = auth_data->sae_status; 7629 auth_data->expected_transaction = trans; 7630 } 7631 7632 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7633 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7634 IEEE80211_TX_INTFL_MLME_CONN_TX; 7635 7636 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7637 auth_data->data, auth_data->data_len, 7638 auth_data->ap_addr, auth_data->ap_addr, 7639 NULL, 0, 0, tx_flags); 7640 7641 if (tx_flags == 0) { 7642 if (auth_data->algorithm == WLAN_AUTH_SAE) 7643 auth_data->timeout = jiffies + 7644 IEEE80211_AUTH_TIMEOUT_SAE; 7645 else 7646 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7647 } else { 7648 auth_data->timeout = 7649 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7650 } 7651 7652 auth_data->timeout_started = true; 7653 run_again(sdata, auth_data->timeout); 7654 7655 return 0; 7656 } 7657 7658 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7659 { 7660 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7661 struct ieee80211_local *local = sdata->local; 7662 int ret; 7663 7664 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7665 7666 assoc_data->tries++; 7667 assoc_data->comeback = false; 7668 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7669 sdata_info(sdata, "association with %pM timed out\n", 7670 assoc_data->ap_addr); 7671 7672 /* 7673 * Most likely AP is not in the range so remove the 7674 * bss struct for that AP. 7675 */ 7676 cfg80211_unlink_bss(local->hw.wiphy, 7677 assoc_data->link[assoc_data->assoc_link_id].bss); 7678 7679 return -ETIMEDOUT; 7680 } 7681 7682 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7683 assoc_data->ap_addr, assoc_data->tries, 7684 IEEE80211_ASSOC_MAX_TRIES); 7685 ret = ieee80211_send_assoc(sdata); 7686 if (ret) 7687 return ret; 7688 7689 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7690 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7691 assoc_data->timeout_started = true; 7692 run_again(sdata, assoc_data->timeout); 7693 } else { 7694 assoc_data->timeout = 7695 round_jiffies_up(jiffies + 7696 IEEE80211_ASSOC_TIMEOUT_LONG); 7697 assoc_data->timeout_started = true; 7698 run_again(sdata, assoc_data->timeout); 7699 } 7700 7701 return 0; 7702 } 7703 7704 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7705 __le16 fc, bool acked) 7706 { 7707 struct ieee80211_local *local = sdata->local; 7708 7709 sdata->u.mgd.status_fc = fc; 7710 sdata->u.mgd.status_acked = acked; 7711 sdata->u.mgd.status_received = true; 7712 7713 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7714 } 7715 7716 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7717 { 7718 struct ieee80211_local *local = sdata->local; 7719 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7720 7721 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7722 7723 if (ifmgd->status_received) { 7724 __le16 fc = ifmgd->status_fc; 7725 bool status_acked = ifmgd->status_acked; 7726 7727 ifmgd->status_received = false; 7728 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7729 if (status_acked) { 7730 if (ifmgd->auth_data->algorithm == 7731 WLAN_AUTH_SAE) 7732 ifmgd->auth_data->timeout = 7733 jiffies + 7734 IEEE80211_AUTH_TIMEOUT_SAE; 7735 else 7736 ifmgd->auth_data->timeout = 7737 jiffies + 7738 IEEE80211_AUTH_TIMEOUT_SHORT; 7739 run_again(sdata, ifmgd->auth_data->timeout); 7740 } else { 7741 ifmgd->auth_data->timeout = jiffies - 1; 7742 } 7743 ifmgd->auth_data->timeout_started = true; 7744 } else if (ifmgd->assoc_data && 7745 !ifmgd->assoc_data->comeback && 7746 (ieee80211_is_assoc_req(fc) || 7747 ieee80211_is_reassoc_req(fc))) { 7748 /* 7749 * Update association timeout based on the TX status 7750 * for the (Re)Association Request frame. Skip this if 7751 * we have already processed a (Re)Association Response 7752 * frame that indicated need for association comeback 7753 * at a specific time in the future. This could happen 7754 * if the TX status information is delayed enough for 7755 * the response to be received and processed first. 7756 */ 7757 if (status_acked) { 7758 ifmgd->assoc_data->timeout = 7759 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7760 run_again(sdata, ifmgd->assoc_data->timeout); 7761 } else { 7762 ifmgd->assoc_data->timeout = jiffies - 1; 7763 } 7764 ifmgd->assoc_data->timeout_started = true; 7765 } 7766 } 7767 7768 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7769 time_after(jiffies, ifmgd->auth_data->timeout)) { 7770 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7771 /* 7772 * ok ... we waited for assoc or continuation but 7773 * userspace didn't do it, so kill the auth data 7774 */ 7775 ieee80211_destroy_auth_data(sdata, false); 7776 } else if (ieee80211_auth(sdata)) { 7777 u8 ap_addr[ETH_ALEN]; 7778 struct ieee80211_event event = { 7779 .type = MLME_EVENT, 7780 .u.mlme.data = AUTH_EVENT, 7781 .u.mlme.status = MLME_TIMEOUT, 7782 }; 7783 7784 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7785 7786 ieee80211_destroy_auth_data(sdata, false); 7787 7788 cfg80211_auth_timeout(sdata->dev, ap_addr); 7789 drv_event_callback(sdata->local, sdata, &event); 7790 } 7791 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7792 run_again(sdata, ifmgd->auth_data->timeout); 7793 7794 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7795 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7796 if ((ifmgd->assoc_data->need_beacon && 7797 !sdata->deflink.u.mgd.have_beacon) || 7798 ieee80211_do_assoc(sdata)) { 7799 struct ieee80211_event event = { 7800 .type = MLME_EVENT, 7801 .u.mlme.data = ASSOC_EVENT, 7802 .u.mlme.status = MLME_TIMEOUT, 7803 }; 7804 7805 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7806 drv_event_callback(sdata->local, sdata, &event); 7807 } 7808 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7809 run_again(sdata, ifmgd->assoc_data->timeout); 7810 7811 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7812 ifmgd->associated) { 7813 u8 *bssid = sdata->deflink.u.mgd.bssid; 7814 int max_tries; 7815 7816 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7817 max_tries = max_nullfunc_tries; 7818 else 7819 max_tries = max_probe_tries; 7820 7821 /* ACK received for nullfunc probing frame */ 7822 if (!ifmgd->probe_send_count) 7823 ieee80211_reset_ap_probe(sdata); 7824 else if (ifmgd->nullfunc_failed) { 7825 if (ifmgd->probe_send_count < max_tries) { 7826 mlme_dbg(sdata, 7827 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7828 bssid, ifmgd->probe_send_count, 7829 max_tries); 7830 ieee80211_mgd_probe_ap_send(sdata); 7831 } else { 7832 mlme_dbg(sdata, 7833 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7834 bssid); 7835 ieee80211_sta_connection_lost(sdata, 7836 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7837 false); 7838 } 7839 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7840 run_again(sdata, ifmgd->probe_timeout); 7841 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7842 mlme_dbg(sdata, 7843 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7844 bssid, probe_wait_ms); 7845 ieee80211_sta_connection_lost(sdata, 7846 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7847 } else if (ifmgd->probe_send_count < max_tries) { 7848 mlme_dbg(sdata, 7849 "No probe response from AP %pM after %dms, try %d/%i\n", 7850 bssid, probe_wait_ms, 7851 ifmgd->probe_send_count, max_tries); 7852 ieee80211_mgd_probe_ap_send(sdata); 7853 } else { 7854 /* 7855 * We actually lost the connection ... or did we? 7856 * Let's make sure! 7857 */ 7858 mlme_dbg(sdata, 7859 "No probe response from AP %pM after %dms, disconnecting.\n", 7860 bssid, probe_wait_ms); 7861 7862 ieee80211_sta_connection_lost(sdata, 7863 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7864 } 7865 } 7866 } 7867 7868 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7869 { 7870 struct ieee80211_sub_if_data *sdata = 7871 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7872 7873 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7874 return; 7875 7876 if (sdata->vif.bss_conf.csa_active && 7877 !sdata->deflink.u.mgd.csa.waiting_bcn) 7878 return; 7879 7880 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7881 return; 7882 7883 sdata->u.mgd.connection_loss = false; 7884 wiphy_work_queue(sdata->local->hw.wiphy, 7885 &sdata->u.mgd.beacon_connection_loss_work); 7886 } 7887 7888 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7889 { 7890 struct ieee80211_sub_if_data *sdata = 7891 from_timer(sdata, t, u.mgd.conn_mon_timer); 7892 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7893 struct ieee80211_local *local = sdata->local; 7894 struct sta_info *sta; 7895 unsigned long timeout; 7896 7897 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7898 return; 7899 7900 if (sdata->vif.bss_conf.csa_active && 7901 !sdata->deflink.u.mgd.csa.waiting_bcn) 7902 return; 7903 7904 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7905 if (!sta) 7906 return; 7907 7908 timeout = sta->deflink.status_stats.last_ack; 7909 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7910 timeout = sta->deflink.rx_stats.last_rx; 7911 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7912 7913 /* If timeout is after now, then update timer to fire at 7914 * the later date, but do not actually probe at this time. 7915 */ 7916 if (time_is_after_jiffies(timeout)) { 7917 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7918 return; 7919 } 7920 7921 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7922 } 7923 7924 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7925 struct wiphy_work *work) 7926 { 7927 struct ieee80211_sub_if_data *sdata = 7928 container_of(work, struct ieee80211_sub_if_data, 7929 u.mgd.monitor_work); 7930 7931 ieee80211_mgd_probe_ap(sdata, false); 7932 } 7933 7934 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7935 { 7936 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7937 __ieee80211_stop_poll(sdata); 7938 7939 /* let's probe the connection once */ 7940 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7941 wiphy_work_queue(sdata->local->hw.wiphy, 7942 &sdata->u.mgd.monitor_work); 7943 } 7944 } 7945 7946 #ifdef CONFIG_PM 7947 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7948 { 7949 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7950 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7951 7952 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7953 7954 if (ifmgd->auth_data || ifmgd->assoc_data) { 7955 const u8 *ap_addr = ifmgd->auth_data ? 7956 ifmgd->auth_data->ap_addr : 7957 ifmgd->assoc_data->ap_addr; 7958 7959 /* 7960 * If we are trying to authenticate / associate while suspending, 7961 * cfg80211 won't know and won't actually abort those attempts, 7962 * thus we need to do that ourselves. 7963 */ 7964 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7965 IEEE80211_STYPE_DEAUTH, 7966 WLAN_REASON_DEAUTH_LEAVING, 7967 false, frame_buf); 7968 if (ifmgd->assoc_data) 7969 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7970 if (ifmgd->auth_data) 7971 ieee80211_destroy_auth_data(sdata, false); 7972 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7973 IEEE80211_DEAUTH_FRAME_LEN, 7974 false); 7975 } 7976 7977 /* This is a bit of a hack - we should find a better and more generic 7978 * solution to this. Normally when suspending, cfg80211 will in fact 7979 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7980 * auth (not so important) or assoc (this is the problem) process. 7981 * 7982 * As a consequence, it can happen that we are in the process of both 7983 * associating and suspending, and receive an association response 7984 * after cfg80211 has checked if it needs to disconnect, but before 7985 * we actually set the flag to drop incoming frames. This will then 7986 * cause the workqueue flush to process the association response in 7987 * the suspend, resulting in a successful association just before it 7988 * tries to remove the interface from the driver, which now though 7989 * has a channel context assigned ... this results in issues. 7990 * 7991 * To work around this (for now) simply deauth here again if we're 7992 * now connected. 7993 */ 7994 if (ifmgd->associated && !sdata->local->wowlan) { 7995 u8 bssid[ETH_ALEN]; 7996 struct cfg80211_deauth_request req = { 7997 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 7998 .bssid = bssid, 7999 }; 8000 8001 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 8002 ieee80211_mgd_deauth(sdata, &req); 8003 } 8004 } 8005 #endif 8006 8007 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 8008 { 8009 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8010 8011 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8012 8013 if (!ifmgd->associated) 8014 return; 8015 8016 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 8017 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 8018 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 8019 ieee80211_sta_connection_lost(sdata, 8020 WLAN_REASON_UNSPECIFIED, 8021 true); 8022 return; 8023 } 8024 8025 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 8026 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 8027 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 8028 ieee80211_sta_connection_lost(sdata, 8029 WLAN_REASON_UNSPECIFIED, 8030 true); 8031 return; 8032 } 8033 } 8034 8035 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 8036 struct wiphy_work *work) 8037 { 8038 struct ieee80211_link_data *link = 8039 container_of(work, struct ieee80211_link_data, 8040 u.mgd.request_smps_work); 8041 8042 __ieee80211_request_smps_mgd(link->sdata, link, 8043 link->u.mgd.driver_smps_mode); 8044 } 8045 8046 /* interface setup */ 8047 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 8048 { 8049 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8050 8051 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 8052 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 8053 ieee80211_beacon_connection_loss_work); 8054 wiphy_work_init(&ifmgd->csa_connection_drop_work, 8055 ieee80211_csa_connection_drop_work); 8056 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 8057 ieee80211_tdls_peer_del_work); 8058 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 8059 ieee80211_ml_reconf_work); 8060 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 8061 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 8062 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 8063 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 8064 ieee80211_sta_handle_tspec_ac_params_wk); 8065 wiphy_delayed_work_init(&ifmgd->ttlm_work, 8066 ieee80211_tid_to_link_map_work); 8067 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 8068 ieee80211_neg_ttlm_timeout_work); 8069 wiphy_work_init(&ifmgd->teardown_ttlm_work, 8070 ieee80211_teardown_ttlm_work); 8071 8072 ifmgd->flags = 0; 8073 ifmgd->powersave = sdata->wdev.ps; 8074 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 8075 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 8076 /* Setup TDLS data */ 8077 spin_lock_init(&ifmgd->teardown_lock); 8078 ifmgd->teardown_skb = NULL; 8079 ifmgd->orig_teardown_skb = NULL; 8080 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 8081 } 8082 8083 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 8084 struct wiphy_work *work) 8085 { 8086 struct ieee80211_link_data *link = 8087 container_of(work, struct ieee80211_link_data, 8088 u.mgd.recalc_smps); 8089 8090 ieee80211_recalc_smps(link->sdata, link); 8091 } 8092 8093 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 8094 { 8095 struct ieee80211_sub_if_data *sdata = link->sdata; 8096 struct ieee80211_local *local = sdata->local; 8097 unsigned int link_id = link->link_id; 8098 8099 link->u.mgd.p2p_noa_index = -1; 8100 link->conf->bssid = link->u.mgd.bssid; 8101 link->smps_mode = IEEE80211_SMPS_OFF; 8102 8103 wiphy_work_init(&link->u.mgd.request_smps_work, 8104 ieee80211_request_smps_mgd_work); 8105 wiphy_work_init(&link->u.mgd.recalc_smps, 8106 ieee80211_recalc_smps_work); 8107 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 8108 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 8109 else 8110 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 8111 8112 wiphy_delayed_work_init(&link->u.mgd.csa.switch_work, 8113 ieee80211_csa_switch_work); 8114 8115 ieee80211_clear_tpe(&link->conf->tpe); 8116 8117 if (sdata->u.mgd.assoc_data) 8118 ether_addr_copy(link->conf->addr, 8119 sdata->u.mgd.assoc_data->link[link_id].addr); 8120 else if (!is_valid_ether_addr(link->conf->addr)) 8121 eth_random_addr(link->conf->addr); 8122 } 8123 8124 /* scan finished notification */ 8125 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 8126 { 8127 struct ieee80211_sub_if_data *sdata; 8128 8129 /* Restart STA timers */ 8130 rcu_read_lock(); 8131 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 8132 if (ieee80211_sdata_running(sdata)) 8133 ieee80211_restart_sta_timer(sdata); 8134 } 8135 rcu_read_unlock(); 8136 } 8137 8138 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 8139 struct cfg80211_bss *cbss, s8 link_id, 8140 const u8 *ap_mld_addr, bool assoc, 8141 struct ieee80211_conn_settings *conn, 8142 bool override) 8143 { 8144 struct ieee80211_local *local = sdata->local; 8145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8146 struct ieee80211_bss *bss = (void *)cbss->priv; 8147 struct sta_info *new_sta = NULL; 8148 struct ieee80211_link_data *link; 8149 bool have_sta = false; 8150 bool mlo; 8151 int err; 8152 8153 if (link_id >= 0) { 8154 mlo = true; 8155 if (WARN_ON(!ap_mld_addr)) 8156 return -EINVAL; 8157 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 8158 } else { 8159 if (WARN_ON(ap_mld_addr)) 8160 return -EINVAL; 8161 ap_mld_addr = cbss->bssid; 8162 err = ieee80211_vif_set_links(sdata, 0, 0); 8163 link_id = 0; 8164 mlo = false; 8165 } 8166 8167 if (err) 8168 return err; 8169 8170 link = sdata_dereference(sdata->link[link_id], sdata); 8171 if (WARN_ON(!link)) { 8172 err = -ENOLINK; 8173 goto out_err; 8174 } 8175 8176 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 8177 err = -EINVAL; 8178 goto out_err; 8179 } 8180 8181 /* If a reconfig is happening, bail out */ 8182 if (local->in_reconfig) { 8183 err = -EBUSY; 8184 goto out_err; 8185 } 8186 8187 if (assoc) { 8188 rcu_read_lock(); 8189 have_sta = sta_info_get(sdata, ap_mld_addr); 8190 rcu_read_unlock(); 8191 } 8192 8193 if (!have_sta) { 8194 if (mlo) 8195 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 8196 link_id, cbss->bssid, 8197 GFP_KERNEL); 8198 else 8199 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 8200 8201 if (!new_sta) { 8202 err = -ENOMEM; 8203 goto out_err; 8204 } 8205 8206 new_sta->sta.mlo = mlo; 8207 } 8208 8209 /* 8210 * Set up the information for the new channel before setting the 8211 * new channel. We can't - completely race-free - change the basic 8212 * rates bitmap and the channel (sband) that it refers to, but if 8213 * we set it up before we at least avoid calling into the driver's 8214 * bss_info_changed() method with invalid information (since we do 8215 * call that from changing the channel - only for IDLE and perhaps 8216 * some others, but ...). 8217 * 8218 * So to avoid that, just set up all the new information before the 8219 * channel, but tell the driver to apply it only afterwards, since 8220 * it might need the new channel for that. 8221 */ 8222 if (new_sta) { 8223 const struct cfg80211_bss_ies *ies; 8224 struct link_sta_info *link_sta; 8225 8226 rcu_read_lock(); 8227 link_sta = rcu_dereference(new_sta->link[link_id]); 8228 if (WARN_ON(!link_sta)) { 8229 rcu_read_unlock(); 8230 sta_info_free(local, new_sta); 8231 err = -EINVAL; 8232 goto out_err; 8233 } 8234 8235 err = ieee80211_mgd_setup_link_sta(link, new_sta, 8236 link_sta, cbss); 8237 if (err) { 8238 rcu_read_unlock(); 8239 sta_info_free(local, new_sta); 8240 goto out_err; 8241 } 8242 8243 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 8244 8245 /* set timing information */ 8246 link->conf->beacon_int = cbss->beacon_interval; 8247 ies = rcu_dereference(cbss->beacon_ies); 8248 if (ies) { 8249 link->conf->sync_tsf = ies->tsf; 8250 link->conf->sync_device_ts = 8251 bss->device_ts_beacon; 8252 8253 ieee80211_get_dtim(ies, 8254 &link->conf->sync_dtim_count, 8255 NULL); 8256 } else if (!ieee80211_hw_check(&sdata->local->hw, 8257 TIMING_BEACON_ONLY)) { 8258 ies = rcu_dereference(cbss->proberesp_ies); 8259 /* must be non-NULL since beacon IEs were NULL */ 8260 link->conf->sync_tsf = ies->tsf; 8261 link->conf->sync_device_ts = 8262 bss->device_ts_presp; 8263 link->conf->sync_dtim_count = 0; 8264 } else { 8265 link->conf->sync_tsf = 0; 8266 link->conf->sync_device_ts = 0; 8267 link->conf->sync_dtim_count = 0; 8268 } 8269 rcu_read_unlock(); 8270 } 8271 8272 if (new_sta || override) { 8273 /* 8274 * Only set this if we're also going to calculate the AP 8275 * settings etc., otherwise this was set before in a 8276 * previous call. Note override is set to %true in assoc 8277 * if the settings were changed. 8278 */ 8279 link->u.mgd.conn = *conn; 8280 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 8281 mlo, &link->u.mgd.conn); 8282 if (err) { 8283 if (new_sta) 8284 sta_info_free(local, new_sta); 8285 goto out_err; 8286 } 8287 /* pass out for use in assoc */ 8288 *conn = link->u.mgd.conn; 8289 } 8290 8291 if (new_sta) { 8292 /* 8293 * tell driver about BSSID, basic rates and timing 8294 * this was set up above, before setting the channel 8295 */ 8296 ieee80211_link_info_change_notify(sdata, link, 8297 BSS_CHANGED_BSSID | 8298 BSS_CHANGED_BASIC_RATES | 8299 BSS_CHANGED_BEACON_INT); 8300 8301 if (assoc) 8302 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 8303 8304 err = sta_info_insert(new_sta); 8305 new_sta = NULL; 8306 if (err) { 8307 sdata_info(sdata, 8308 "failed to insert STA entry for the AP (error %d)\n", 8309 err); 8310 goto out_release_chan; 8311 } 8312 } else 8313 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 8314 8315 /* Cancel scan to ensure that nothing interferes with connection */ 8316 if (local->scanning) 8317 ieee80211_scan_cancel(local); 8318 8319 return 0; 8320 8321 out_release_chan: 8322 ieee80211_link_release_channel(link); 8323 out_err: 8324 ieee80211_vif_set_links(sdata, 0, 0); 8325 return err; 8326 } 8327 8328 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 8329 const struct cfg80211_bss_ies *ies, 8330 u8 cur_channel, bool ignore_ecsa) 8331 { 8332 const struct element *csa_elem, *ecsa_elem; 8333 struct ieee80211_channel_sw_ie *csa = NULL; 8334 struct ieee80211_ext_chansw_ie *ecsa = NULL; 8335 8336 if (!ies) 8337 return false; 8338 8339 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 8340 ies->data, ies->len); 8341 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 8342 csa = (void *)csa_elem->data; 8343 8344 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 8345 ies->data, ies->len); 8346 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 8347 ecsa = (void *)ecsa_elem->data; 8348 8349 if (csa && csa->count == 0) 8350 csa = NULL; 8351 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 8352 csa = NULL; 8353 8354 if (ecsa && ecsa->count == 0) 8355 ecsa = NULL; 8356 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 8357 ecsa = NULL; 8358 8359 if (ignore_ecsa && ecsa) { 8360 sdata_info(sdata, 8361 "Ignoring ECSA in probe response - was considered stuck!\n"); 8362 return csa; 8363 } 8364 8365 return csa || ecsa; 8366 } 8367 8368 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 8369 struct cfg80211_bss *bss) 8370 { 8371 u8 cur_channel; 8372 bool ret; 8373 8374 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 8375 8376 rcu_read_lock(); 8377 if (ieee80211_mgd_csa_present(sdata, 8378 rcu_dereference(bss->beacon_ies), 8379 cur_channel, false)) { 8380 ret = true; 8381 goto out; 8382 } 8383 8384 if (ieee80211_mgd_csa_present(sdata, 8385 rcu_dereference(bss->proberesp_ies), 8386 cur_channel, bss->proberesp_ecsa_stuck)) { 8387 ret = true; 8388 goto out; 8389 } 8390 8391 ret = false; 8392 out: 8393 rcu_read_unlock(); 8394 return ret; 8395 } 8396 8397 /* config hooks */ 8398 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 8399 struct cfg80211_auth_request *req) 8400 { 8401 struct ieee80211_local *local = sdata->local; 8402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8403 struct ieee80211_mgd_auth_data *auth_data; 8404 struct ieee80211_conn_settings conn; 8405 struct ieee80211_link_data *link; 8406 struct ieee80211_supported_band *sband; 8407 struct ieee80211_bss *bss; 8408 u16 auth_alg; 8409 int err; 8410 bool cont_auth, wmm_used; 8411 8412 lockdep_assert_wiphy(sdata->local->hw.wiphy); 8413 8414 /* prepare auth data structure */ 8415 8416 switch (req->auth_type) { 8417 case NL80211_AUTHTYPE_OPEN_SYSTEM: 8418 auth_alg = WLAN_AUTH_OPEN; 8419 break; 8420 case NL80211_AUTHTYPE_SHARED_KEY: 8421 if (fips_enabled) 8422 return -EOPNOTSUPP; 8423 auth_alg = WLAN_AUTH_SHARED_KEY; 8424 break; 8425 case NL80211_AUTHTYPE_FT: 8426 auth_alg = WLAN_AUTH_FT; 8427 break; 8428 case NL80211_AUTHTYPE_NETWORK_EAP: 8429 auth_alg = WLAN_AUTH_LEAP; 8430 break; 8431 case NL80211_AUTHTYPE_SAE: 8432 auth_alg = WLAN_AUTH_SAE; 8433 break; 8434 case NL80211_AUTHTYPE_FILS_SK: 8435 auth_alg = WLAN_AUTH_FILS_SK; 8436 break; 8437 case NL80211_AUTHTYPE_FILS_SK_PFS: 8438 auth_alg = WLAN_AUTH_FILS_SK_PFS; 8439 break; 8440 case NL80211_AUTHTYPE_FILS_PK: 8441 auth_alg = WLAN_AUTH_FILS_PK; 8442 break; 8443 default: 8444 return -EOPNOTSUPP; 8445 } 8446 8447 if (ifmgd->assoc_data) 8448 return -EBUSY; 8449 8450 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 8451 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 8452 return -EINVAL; 8453 } 8454 8455 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 8456 req->ie_len, GFP_KERNEL); 8457 if (!auth_data) 8458 return -ENOMEM; 8459 8460 memcpy(auth_data->ap_addr, 8461 req->ap_mld_addr ?: req->bss->bssid, 8462 ETH_ALEN); 8463 auth_data->bss = req->bss; 8464 auth_data->link_id = req->link_id; 8465 8466 if (req->auth_data_len >= 4) { 8467 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 8468 __le16 *pos = (__le16 *) req->auth_data; 8469 8470 auth_data->sae_trans = le16_to_cpu(pos[0]); 8471 auth_data->sae_status = le16_to_cpu(pos[1]); 8472 } 8473 memcpy(auth_data->data, req->auth_data + 4, 8474 req->auth_data_len - 4); 8475 auth_data->data_len += req->auth_data_len - 4; 8476 } 8477 8478 /* Check if continuing authentication or trying to authenticate with the 8479 * same BSS that we were in the process of authenticating with and avoid 8480 * removal and re-addition of the STA entry in 8481 * ieee80211_prep_connection(). 8482 */ 8483 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 8484 ifmgd->auth_data->link_id == req->link_id; 8485 8486 if (req->ie && req->ie_len) { 8487 memcpy(&auth_data->data[auth_data->data_len], 8488 req->ie, req->ie_len); 8489 auth_data->data_len += req->ie_len; 8490 } 8491 8492 if (req->key && req->key_len) { 8493 auth_data->key_len = req->key_len; 8494 auth_data->key_idx = req->key_idx; 8495 memcpy(auth_data->key, req->key, req->key_len); 8496 } 8497 8498 auth_data->algorithm = auth_alg; 8499 8500 /* try to authenticate/probe */ 8501 8502 if (ifmgd->auth_data) { 8503 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 8504 auth_data->peer_confirmed = 8505 ifmgd->auth_data->peer_confirmed; 8506 } 8507 ieee80211_destroy_auth_data(sdata, cont_auth); 8508 } 8509 8510 /* prep auth_data so we don't go into idle on disassoc */ 8511 ifmgd->auth_data = auth_data; 8512 8513 /* If this is continuation of an ongoing SAE authentication exchange 8514 * (i.e., request to send SAE Confirm) and the peer has already 8515 * confirmed, mark authentication completed since we are about to send 8516 * out SAE Confirm. 8517 */ 8518 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 8519 auth_data->peer_confirmed && auth_data->sae_trans == 2) 8520 ieee80211_mark_sta_auth(sdata); 8521 8522 if (ifmgd->associated) { 8523 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8524 8525 sdata_info(sdata, 8526 "disconnect from AP %pM for new auth to %pM\n", 8527 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 8528 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8529 WLAN_REASON_UNSPECIFIED, 8530 false, frame_buf); 8531 8532 ieee80211_report_disconnect(sdata, frame_buf, 8533 sizeof(frame_buf), true, 8534 WLAN_REASON_UNSPECIFIED, 8535 false); 8536 } 8537 8538 /* needed for transmitting the auth frame(s) properly */ 8539 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 8540 8541 bss = (void *)req->bss->priv; 8542 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 8543 8544 sband = local->hw.wiphy->bands[req->bss->channel->band]; 8545 8546 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 8547 &conn); 8548 8549 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 8550 req->ap_mld_addr, cont_auth, 8551 &conn, false); 8552 if (err) 8553 goto err_clear; 8554 8555 if (req->link_id >= 0) 8556 link = sdata_dereference(sdata->link[req->link_id], sdata); 8557 else 8558 link = &sdata->deflink; 8559 8560 if (WARN_ON(!link)) { 8561 err = -ENOLINK; 8562 goto err_clear; 8563 } 8564 8565 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8566 auth_data->ap_addr, link->conf->addr); 8567 8568 err = ieee80211_auth(sdata); 8569 if (err) { 8570 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8571 goto err_clear; 8572 } 8573 8574 /* hold our own reference */ 8575 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8576 return 0; 8577 8578 err_clear: 8579 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8580 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8581 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8582 BSS_CHANGED_BSSID); 8583 ieee80211_link_release_channel(&sdata->deflink); 8584 } 8585 ifmgd->auth_data = NULL; 8586 kfree(auth_data); 8587 return err; 8588 } 8589 8590 static void 8591 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8592 struct ieee80211_mgd_assoc_data *assoc_data, 8593 struct cfg80211_assoc_request *req, 8594 struct ieee80211_conn_settings *conn, 8595 unsigned int link_id) 8596 { 8597 struct ieee80211_local *local = sdata->local; 8598 const struct cfg80211_bss_ies *bss_ies; 8599 struct ieee80211_supported_band *sband; 8600 struct ieee80211_link_data *link; 8601 struct cfg80211_bss *cbss; 8602 struct ieee80211_bss *bss; 8603 8604 cbss = assoc_data->link[link_id].bss; 8605 if (WARN_ON(!cbss)) 8606 return; 8607 8608 bss = (void *)cbss->priv; 8609 8610 sband = local->hw.wiphy->bands[cbss->channel->band]; 8611 if (WARN_ON(!sband)) 8612 return; 8613 8614 link = sdata_dereference(sdata->link[link_id], sdata); 8615 if (WARN_ON(!link)) 8616 return; 8617 8618 /* for MLO connections assume advertising all rates is OK */ 8619 if (!req->ap_mld_addr) { 8620 assoc_data->supp_rates = bss->supp_rates; 8621 assoc_data->supp_rates_len = bss->supp_rates_len; 8622 } 8623 8624 /* copy and link elems for the STA profile */ 8625 if (req->links[link_id].elems_len) { 8626 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8627 req->links[link_id].elems_len); 8628 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8629 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8630 assoc_data->ie_pos += req->links[link_id].elems_len; 8631 } 8632 8633 link->u.mgd.beacon_crc_valid = false; 8634 link->u.mgd.dtim_period = 0; 8635 link->u.mgd.have_beacon = false; 8636 8637 /* override HT configuration only if the AP and we support it */ 8638 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8639 struct ieee80211_sta_ht_cap sta_ht_cap; 8640 8641 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8642 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8643 } 8644 8645 rcu_read_lock(); 8646 bss_ies = rcu_dereference(cbss->beacon_ies); 8647 if (bss_ies) { 8648 u8 dtim_count = 0; 8649 8650 ieee80211_get_dtim(bss_ies, &dtim_count, 8651 &link->u.mgd.dtim_period); 8652 8653 sdata->deflink.u.mgd.have_beacon = true; 8654 8655 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8656 link->conf->sync_tsf = bss_ies->tsf; 8657 link->conf->sync_device_ts = bss->device_ts_beacon; 8658 link->conf->sync_dtim_count = dtim_count; 8659 } 8660 } else { 8661 bss_ies = rcu_dereference(cbss->ies); 8662 } 8663 8664 if (bss_ies) { 8665 const struct element *elem; 8666 8667 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8668 bss_ies->data, bss_ies->len); 8669 if (elem && elem->datalen >= 3) 8670 link->conf->profile_periodicity = elem->data[2]; 8671 else 8672 link->conf->profile_periodicity = 0; 8673 8674 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8675 bss_ies->data, bss_ies->len); 8676 if (elem && elem->datalen >= 11 && 8677 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8678 link->conf->ema_ap = true; 8679 else 8680 link->conf->ema_ap = false; 8681 } 8682 rcu_read_unlock(); 8683 8684 if (bss->corrupt_data) { 8685 char *corrupt_type = "data"; 8686 8687 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8688 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8689 corrupt_type = "beacon and probe response"; 8690 else 8691 corrupt_type = "beacon"; 8692 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8693 corrupt_type = "probe response"; 8694 } 8695 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8696 cbss->bssid, corrupt_type); 8697 } 8698 8699 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8700 if (sdata->u.mgd.powersave) 8701 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8702 else 8703 link->smps_mode = IEEE80211_SMPS_OFF; 8704 } else { 8705 link->smps_mode = link->u.mgd.req_smps; 8706 } 8707 } 8708 8709 static int 8710 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8711 struct ieee80211_mgd_assoc_data *assoc_data, 8712 int link_id) 8713 { 8714 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8715 enum nl80211_band band = cbss->channel->band; 8716 struct ieee80211_supported_band *sband; 8717 const struct element *elem; 8718 int err; 8719 8720 /* neither HT nor VHT elements used on 6 GHz */ 8721 if (band == NL80211_BAND_6GHZ) 8722 return 0; 8723 8724 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8725 return 0; 8726 8727 rcu_read_lock(); 8728 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8729 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8730 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8731 cbss->bssid); 8732 err = -EINVAL; 8733 goto out_rcu; 8734 } 8735 assoc_data->link[link_id].ap_ht_param = 8736 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8737 rcu_read_unlock(); 8738 8739 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8740 return 0; 8741 8742 /* some drivers want to support VHT on 2.4 GHz even */ 8743 sband = sdata->local->hw.wiphy->bands[band]; 8744 if (!sband->vht_cap.vht_supported) 8745 return 0; 8746 8747 rcu_read_lock(); 8748 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8749 /* but even then accept it not being present on the AP */ 8750 if (!elem && band == NL80211_BAND_2GHZ) { 8751 err = 0; 8752 goto out_rcu; 8753 } 8754 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8755 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8756 cbss->bssid); 8757 err = -EINVAL; 8758 goto out_rcu; 8759 } 8760 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8761 sizeof(struct ieee80211_vht_cap)); 8762 rcu_read_unlock(); 8763 8764 return 0; 8765 out_rcu: 8766 rcu_read_unlock(); 8767 return err; 8768 } 8769 8770 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8771 struct cfg80211_assoc_request *req) 8772 { 8773 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8774 struct ieee80211_local *local = sdata->local; 8775 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8776 struct ieee80211_mgd_assoc_data *assoc_data; 8777 const struct element *ssid_elem; 8778 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8779 struct ieee80211_link_data *link; 8780 struct cfg80211_bss *cbss; 8781 bool override, uapsd_supported; 8782 bool match_auth; 8783 int i, err; 8784 size_t size = sizeof(*assoc_data) + req->ie_len; 8785 8786 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8787 size += req->links[i].elems_len; 8788 8789 /* FIXME: no support for 4-addr MLO yet */ 8790 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8791 return -EOPNOTSUPP; 8792 8793 assoc_data = kzalloc(size, GFP_KERNEL); 8794 if (!assoc_data) 8795 return -ENOMEM; 8796 8797 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8798 8799 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8800 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8801 err = -EINVAL; 8802 goto err_free; 8803 } 8804 8805 rcu_read_lock(); 8806 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8807 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8808 rcu_read_unlock(); 8809 err = -EINVAL; 8810 goto err_free; 8811 } 8812 8813 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8814 assoc_data->ssid_len = ssid_elem->datalen; 8815 rcu_read_unlock(); 8816 8817 if (req->ap_mld_addr) 8818 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8819 else 8820 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8821 8822 if (ifmgd->associated) { 8823 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8824 8825 sdata_info(sdata, 8826 "disconnect from AP %pM for new assoc to %pM\n", 8827 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8828 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8829 WLAN_REASON_UNSPECIFIED, 8830 false, frame_buf); 8831 8832 ieee80211_report_disconnect(sdata, frame_buf, 8833 sizeof(frame_buf), true, 8834 WLAN_REASON_UNSPECIFIED, 8835 false); 8836 } 8837 8838 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8839 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8840 sizeof(ifmgd->ht_capa_mask)); 8841 8842 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8843 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8844 sizeof(ifmgd->vht_capa_mask)); 8845 8846 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8847 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8848 sizeof(ifmgd->s1g_capa_mask)); 8849 8850 /* keep some setup (AP STA, channel, ...) if matching */ 8851 match_auth = ifmgd->auth_data && 8852 ether_addr_equal(ifmgd->auth_data->ap_addr, 8853 assoc_data->ap_addr) && 8854 ifmgd->auth_data->link_id == req->link_id; 8855 8856 if (req->ap_mld_addr) { 8857 uapsd_supported = true; 8858 8859 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8860 ASSOC_REQ_DISABLE_VHT | 8861 ASSOC_REQ_DISABLE_HE | 8862 ASSOC_REQ_DISABLE_EHT)) { 8863 err = -EINVAL; 8864 goto err_free; 8865 } 8866 8867 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8868 struct ieee80211_supported_band *sband; 8869 struct cfg80211_bss *link_cbss = req->links[i].bss; 8870 struct ieee80211_bss *bss; 8871 8872 if (!link_cbss) 8873 continue; 8874 8875 bss = (void *)link_cbss->priv; 8876 8877 if (!bss->wmm_used) { 8878 err = -EINVAL; 8879 req->links[i].error = err; 8880 goto err_free; 8881 } 8882 8883 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8884 err = -EINVAL; 8885 req->links[i].error = err; 8886 goto err_free; 8887 } 8888 8889 link = sdata_dereference(sdata->link[i], sdata); 8890 if (link) 8891 ether_addr_copy(assoc_data->link[i].addr, 8892 link->conf->addr); 8893 else 8894 eth_random_addr(assoc_data->link[i].addr); 8895 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8896 8897 if (match_auth && i == assoc_link_id && link) 8898 assoc_data->link[i].conn = link->u.mgd.conn; 8899 else 8900 assoc_data->link[i].conn = 8901 ieee80211_conn_settings_unlimited; 8902 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8903 req, true, i, 8904 &assoc_data->link[i].conn); 8905 assoc_data->link[i].bss = link_cbss; 8906 assoc_data->link[i].disabled = req->links[i].disabled; 8907 8908 if (!bss->uapsd_supported) 8909 uapsd_supported = false; 8910 8911 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 8912 err = -EINVAL; 8913 req->links[i].error = err; 8914 goto err_free; 8915 } 8916 8917 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 8918 assoc_data, i); 8919 if (err) { 8920 err = -EINVAL; 8921 req->links[i].error = err; 8922 goto err_free; 8923 } 8924 } 8925 8926 assoc_data->wmm = true; 8927 } else { 8928 struct ieee80211_supported_band *sband; 8929 struct ieee80211_bss *bss = (void *)cbss->priv; 8930 8931 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8932 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8933 8934 assoc_data->wmm = bss->wmm_used && 8935 (local->hw.queues >= IEEE80211_NUM_ACS); 8936 8937 if (cbss->channel->band == NL80211_BAND_6GHZ && 8938 req->flags & (ASSOC_REQ_DISABLE_HT | 8939 ASSOC_REQ_DISABLE_VHT | 8940 ASSOC_REQ_DISABLE_HE)) { 8941 err = -EINVAL; 8942 goto err_free; 8943 } 8944 8945 sband = local->hw.wiphy->bands[cbss->channel->band]; 8946 8947 assoc_data->link[0].bss = cbss; 8948 8949 if (match_auth) 8950 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 8951 else 8952 assoc_data->link[0].conn = 8953 ieee80211_conn_settings_unlimited; 8954 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 8955 assoc_data->wmm, 0, 8956 &assoc_data->link[0].conn); 8957 8958 uapsd_supported = bss->uapsd_supported; 8959 8960 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 8961 if (err) 8962 goto err_free; 8963 } 8964 8965 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8966 8967 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8968 err = -EBUSY; 8969 goto err_free; 8970 } 8971 8972 if (ifmgd->assoc_data) { 8973 err = -EBUSY; 8974 goto err_free; 8975 } 8976 8977 /* Cleanup is delayed if auth_data matches */ 8978 if (ifmgd->auth_data && !match_auth) 8979 ieee80211_destroy_auth_data(sdata, false); 8980 8981 if (req->ie && req->ie_len) { 8982 memcpy(assoc_data->ie, req->ie, req->ie_len); 8983 assoc_data->ie_len = req->ie_len; 8984 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 8985 } else { 8986 assoc_data->ie_pos = assoc_data->ie; 8987 } 8988 8989 if (req->fils_kek) { 8990 /* should already be checked in cfg80211 - so warn */ 8991 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 8992 err = -EINVAL; 8993 goto err_free; 8994 } 8995 memcpy(assoc_data->fils_kek, req->fils_kek, 8996 req->fils_kek_len); 8997 assoc_data->fils_kek_len = req->fils_kek_len; 8998 } 8999 9000 if (req->fils_nonces) 9001 memcpy(assoc_data->fils_nonces, req->fils_nonces, 9002 2 * FILS_NONCE_LEN); 9003 9004 /* default timeout */ 9005 assoc_data->timeout = jiffies; 9006 assoc_data->timeout_started = true; 9007 9008 assoc_data->assoc_link_id = assoc_link_id; 9009 9010 if (req->ap_mld_addr) { 9011 /* if there was no authentication, set up the link */ 9012 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 9013 if (err) 9014 goto err_clear; 9015 } 9016 9017 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 9018 if (WARN_ON(!link)) { 9019 err = -EINVAL; 9020 goto err_clear; 9021 } 9022 9023 override = link->u.mgd.conn.mode != 9024 assoc_data->link[assoc_link_id].conn.mode || 9025 link->u.mgd.conn.bw_limit != 9026 assoc_data->link[assoc_link_id].conn.bw_limit; 9027 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 9028 9029 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 9030 assoc_link_id); 9031 9032 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 9033 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 9034 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 9035 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 9036 9037 if (assoc_data->wmm && uapsd_supported && 9038 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 9039 assoc_data->uapsd = true; 9040 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 9041 } else { 9042 assoc_data->uapsd = false; 9043 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 9044 } 9045 9046 if (req->prev_bssid) 9047 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 9048 9049 if (req->use_mfp) { 9050 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 9051 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 9052 } else { 9053 ifmgd->mfp = IEEE80211_MFP_DISABLED; 9054 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 9055 } 9056 9057 if (req->flags & ASSOC_REQ_USE_RRM) 9058 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 9059 else 9060 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 9061 9062 if (req->crypto.control_port) 9063 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 9064 else 9065 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 9066 9067 sdata->control_port_protocol = req->crypto.control_port_ethertype; 9068 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 9069 sdata->control_port_over_nl80211 = 9070 req->crypto.control_port_over_nl80211; 9071 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 9072 9073 /* kick off associate process */ 9074 ifmgd->assoc_data = assoc_data; 9075 9076 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 9077 if (!assoc_data->link[i].bss) 9078 continue; 9079 if (i == assoc_data->assoc_link_id) 9080 continue; 9081 /* only calculate the mode, hence link == NULL */ 9082 err = ieee80211_prep_channel(sdata, NULL, i, 9083 assoc_data->link[i].bss, true, 9084 &assoc_data->link[i].conn); 9085 if (err) { 9086 req->links[i].error = err; 9087 goto err_clear; 9088 } 9089 } 9090 9091 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 9092 vif_cfg->ssid_len = assoc_data->ssid_len; 9093 9094 /* needed for transmitting the assoc frames properly */ 9095 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 9096 9097 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 9098 req->ap_mld_addr, true, 9099 &assoc_data->link[assoc_link_id].conn, 9100 override); 9101 if (err) 9102 goto err_clear; 9103 9104 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 9105 const struct cfg80211_bss_ies *beacon_ies; 9106 9107 rcu_read_lock(); 9108 beacon_ies = rcu_dereference(req->bss->beacon_ies); 9109 if (!beacon_ies) { 9110 /* 9111 * Wait up to one beacon interval ... 9112 * should this be more if we miss one? 9113 */ 9114 sdata_info(sdata, "waiting for beacon from %pM\n", 9115 link->u.mgd.bssid); 9116 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 9117 assoc_data->timeout_started = true; 9118 assoc_data->need_beacon = true; 9119 } 9120 rcu_read_unlock(); 9121 } 9122 9123 run_again(sdata, assoc_data->timeout); 9124 9125 /* We are associating, clean up auth_data */ 9126 if (ifmgd->auth_data) 9127 ieee80211_destroy_auth_data(sdata, true); 9128 9129 return 0; 9130 err_clear: 9131 if (!ifmgd->auth_data) { 9132 eth_zero_addr(sdata->deflink.u.mgd.bssid); 9133 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 9134 BSS_CHANGED_BSSID); 9135 } 9136 ifmgd->assoc_data = NULL; 9137 err_free: 9138 kfree(assoc_data); 9139 return err; 9140 } 9141 9142 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 9143 struct cfg80211_deauth_request *req) 9144 { 9145 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9146 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9147 bool tx = !req->local_state_change; 9148 struct ieee80211_prep_tx_info info = { 9149 .subtype = IEEE80211_STYPE_DEAUTH, 9150 }; 9151 9152 if (ifmgd->auth_data && 9153 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 9154 sdata_info(sdata, 9155 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 9156 req->bssid, req->reason_code, 9157 ieee80211_get_reason_code_string(req->reason_code)); 9158 9159 info.link_id = ifmgd->auth_data->link_id; 9160 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9161 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9162 IEEE80211_STYPE_DEAUTH, 9163 req->reason_code, tx, 9164 frame_buf); 9165 ieee80211_destroy_auth_data(sdata, false); 9166 ieee80211_report_disconnect(sdata, frame_buf, 9167 sizeof(frame_buf), true, 9168 req->reason_code, false); 9169 drv_mgd_complete_tx(sdata->local, sdata, &info); 9170 return 0; 9171 } 9172 9173 if (ifmgd->assoc_data && 9174 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 9175 sdata_info(sdata, 9176 "aborting association with %pM by local choice (Reason: %u=%s)\n", 9177 req->bssid, req->reason_code, 9178 ieee80211_get_reason_code_string(req->reason_code)); 9179 9180 info.link_id = ifmgd->assoc_data->assoc_link_id; 9181 drv_mgd_prepare_tx(sdata->local, sdata, &info); 9182 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 9183 IEEE80211_STYPE_DEAUTH, 9184 req->reason_code, tx, 9185 frame_buf); 9186 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 9187 ieee80211_report_disconnect(sdata, frame_buf, 9188 sizeof(frame_buf), true, 9189 req->reason_code, false); 9190 drv_mgd_complete_tx(sdata->local, sdata, &info); 9191 return 0; 9192 } 9193 9194 if (ifmgd->associated && 9195 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 9196 sdata_info(sdata, 9197 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 9198 req->bssid, req->reason_code, 9199 ieee80211_get_reason_code_string(req->reason_code)); 9200 9201 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 9202 req->reason_code, tx, frame_buf); 9203 ieee80211_report_disconnect(sdata, frame_buf, 9204 sizeof(frame_buf), true, 9205 req->reason_code, false); 9206 drv_mgd_complete_tx(sdata->local, sdata, &info); 9207 return 0; 9208 } 9209 9210 return -ENOTCONN; 9211 } 9212 9213 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 9214 struct cfg80211_disassoc_request *req) 9215 { 9216 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 9217 9218 if (!sdata->u.mgd.associated || 9219 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 9220 return -ENOTCONN; 9221 9222 sdata_info(sdata, 9223 "disassociating from %pM by local choice (Reason: %u=%s)\n", 9224 req->ap_addr, req->reason_code, 9225 ieee80211_get_reason_code_string(req->reason_code)); 9226 9227 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 9228 req->reason_code, !req->local_state_change, 9229 frame_buf); 9230 9231 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 9232 req->reason_code, false); 9233 9234 return 0; 9235 } 9236 9237 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 9238 { 9239 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9240 &link->u.mgd.request_smps_work); 9241 wiphy_work_cancel(link->sdata->local->hw.wiphy, 9242 &link->u.mgd.recalc_smps); 9243 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 9244 &link->u.mgd.csa.switch_work); 9245 } 9246 9247 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 9248 { 9249 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 9250 9251 /* 9252 * Make sure some work items will not run after this, 9253 * they will not do anything but might not have been 9254 * cancelled when disconnecting. 9255 */ 9256 wiphy_work_cancel(sdata->local->hw.wiphy, 9257 &ifmgd->monitor_work); 9258 wiphy_work_cancel(sdata->local->hw.wiphy, 9259 &ifmgd->beacon_connection_loss_work); 9260 wiphy_work_cancel(sdata->local->hw.wiphy, 9261 &ifmgd->csa_connection_drop_work); 9262 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 9263 &ifmgd->tdls_peer_del_work); 9264 9265 if (ifmgd->assoc_data) 9266 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 9267 if (ifmgd->auth_data) 9268 ieee80211_destroy_auth_data(sdata, false); 9269 spin_lock_bh(&ifmgd->teardown_lock); 9270 if (ifmgd->teardown_skb) { 9271 kfree_skb(ifmgd->teardown_skb); 9272 ifmgd->teardown_skb = NULL; 9273 ifmgd->orig_teardown_skb = NULL; 9274 } 9275 kfree(ifmgd->assoc_req_ies); 9276 ifmgd->assoc_req_ies = NULL; 9277 ifmgd->assoc_req_ies_len = 0; 9278 spin_unlock_bh(&ifmgd->teardown_lock); 9279 del_timer_sync(&ifmgd->timer); 9280 } 9281 9282 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 9283 enum nl80211_cqm_rssi_threshold_event rssi_event, 9284 s32 rssi_level, 9285 gfp_t gfp) 9286 { 9287 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9288 9289 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 9290 9291 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 9292 } 9293 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 9294 9295 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 9296 { 9297 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9298 9299 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 9300 9301 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 9302 } 9303 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 9304 9305 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 9306 int rssi_min_thold, 9307 int rssi_max_thold) 9308 { 9309 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 9310 9311 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 9312 return; 9313 9314 /* 9315 * Scale up threshold values before storing it, as the RSSI averaging 9316 * algorithm uses a scaled up value as well. Change this scaling 9317 * factor if the RSSI averaging algorithm changes. 9318 */ 9319 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 9320 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 9321 } 9322 9323 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 9324 int rssi_min_thold, 9325 int rssi_max_thold) 9326 { 9327 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9328 9329 WARN_ON(rssi_min_thold == rssi_max_thold || 9330 rssi_min_thold > rssi_max_thold); 9331 9332 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 9333 rssi_max_thold); 9334 } 9335 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 9336 9337 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 9338 { 9339 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 9340 9341 _ieee80211_enable_rssi_reports(sdata, 0, 0); 9342 } 9343 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 9344