1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * BSS client mode implementation 4 * Copyright 2003-2008, Jouni Malinen <j@w1.fi> 5 * Copyright 2004, Instant802 Networks, Inc. 6 * Copyright 2005, Devicescape Software, Inc. 7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net> 9 * Copyright 2013-2014 Intel Mobile Communications GmbH 10 * Copyright (C) 2015 - 2017 Intel Deutschland GmbH 11 * Copyright (C) 2018 - 2024 Intel Corporation 12 */ 13 14 #include <linux/delay.h> 15 #include <linux/fips.h> 16 #include <linux/if_ether.h> 17 #include <linux/skbuff.h> 18 #include <linux/if_arp.h> 19 #include <linux/etherdevice.h> 20 #include <linux/moduleparam.h> 21 #include <linux/rtnetlink.h> 22 #include <linux/crc32.h> 23 #include <linux/slab.h> 24 #include <linux/export.h> 25 #include <net/mac80211.h> 26 #include <asm/unaligned.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "led.h" 32 #include "fils_aead.h" 33 34 #define IEEE80211_AUTH_TIMEOUT (HZ / 5) 35 #define IEEE80211_AUTH_TIMEOUT_LONG (HZ / 2) 36 #define IEEE80211_AUTH_TIMEOUT_SHORT (HZ / 10) 37 #define IEEE80211_AUTH_TIMEOUT_SAE (HZ * 2) 38 #define IEEE80211_AUTH_MAX_TRIES 3 39 #define IEEE80211_AUTH_WAIT_ASSOC (HZ * 5) 40 #define IEEE80211_AUTH_WAIT_SAE_RETRY (HZ * 2) 41 #define IEEE80211_ASSOC_TIMEOUT (HZ / 5) 42 #define IEEE80211_ASSOC_TIMEOUT_LONG (HZ / 2) 43 #define IEEE80211_ASSOC_TIMEOUT_SHORT (HZ / 10) 44 #define IEEE80211_ASSOC_MAX_TRIES 3 45 46 #define IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS msecs_to_jiffies(100) 47 #define IEEE80211_ADV_TTLM_ST_UNDERFLOW 0xff00 48 49 #define IEEE80211_NEG_TTLM_REQ_TIMEOUT (HZ / 5) 50 51 static int max_nullfunc_tries = 2; 52 module_param(max_nullfunc_tries, int, 0644); 53 MODULE_PARM_DESC(max_nullfunc_tries, 54 "Maximum nullfunc tx tries before disconnecting (reason 4)."); 55 56 static int max_probe_tries = 5; 57 module_param(max_probe_tries, int, 0644); 58 MODULE_PARM_DESC(max_probe_tries, 59 "Maximum probe tries before disconnecting (reason 4)."); 60 61 /* 62 * Beacon loss timeout is calculated as N frames times the 63 * advertised beacon interval. This may need to be somewhat 64 * higher than what hardware might detect to account for 65 * delays in the host processing frames. But since we also 66 * probe on beacon miss before declaring the connection lost 67 * default to what we want. 68 */ 69 static int beacon_loss_count = 7; 70 module_param(beacon_loss_count, int, 0644); 71 MODULE_PARM_DESC(beacon_loss_count, 72 "Number of beacon intervals before we decide beacon was lost."); 73 74 /* 75 * Time the connection can be idle before we probe 76 * it to see if we can still talk to the AP. 77 */ 78 #define IEEE80211_CONNECTION_IDLE_TIME (30 * HZ) 79 /* 80 * Time we wait for a probe response after sending 81 * a probe request because of beacon loss or for 82 * checking the connection still works. 83 */ 84 static int probe_wait_ms = 500; 85 module_param(probe_wait_ms, int, 0644); 86 MODULE_PARM_DESC(probe_wait_ms, 87 "Maximum time(ms) to wait for probe response" 88 " before disconnecting (reason 4)."); 89 90 /* 91 * How many Beacon frames need to have been used in average signal strength 92 * before starting to indicate signal change events. 93 */ 94 #define IEEE80211_SIGNAL_AVE_MIN_COUNT 4 95 96 /* 97 * We can have multiple work items (and connection probing) 98 * scheduling this timer, but we need to take care to only 99 * reschedule it when it should fire _earlier_ than it was 100 * asked for before, or if it's not pending right now. This 101 * function ensures that. Note that it then is required to 102 * run this function for all timeouts after the first one 103 * has happened -- the work that runs from this timer will 104 * do that. 105 */ 106 static void run_again(struct ieee80211_sub_if_data *sdata, 107 unsigned long timeout) 108 { 109 lockdep_assert_wiphy(sdata->local->hw.wiphy); 110 111 if (!timer_pending(&sdata->u.mgd.timer) || 112 time_before(timeout, sdata->u.mgd.timer.expires)) 113 mod_timer(&sdata->u.mgd.timer, timeout); 114 } 115 116 void ieee80211_sta_reset_beacon_monitor(struct ieee80211_sub_if_data *sdata) 117 { 118 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 119 return; 120 121 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 122 return; 123 124 mod_timer(&sdata->u.mgd.bcn_mon_timer, 125 round_jiffies_up(jiffies + sdata->u.mgd.beacon_timeout)); 126 } 127 128 void ieee80211_sta_reset_conn_monitor(struct ieee80211_sub_if_data *sdata) 129 { 130 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 131 132 if (unlikely(!ifmgd->associated)) 133 return; 134 135 if (ifmgd->probe_send_count) 136 ifmgd->probe_send_count = 0; 137 138 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 139 return; 140 141 mod_timer(&ifmgd->conn_mon_timer, 142 round_jiffies_up(jiffies + IEEE80211_CONNECTION_IDLE_TIME)); 143 } 144 145 static int ecw2cw(int ecw) 146 { 147 return (1 << ecw) - 1; 148 } 149 150 static enum ieee80211_conn_mode 151 ieee80211_determine_ap_chan(struct ieee80211_sub_if_data *sdata, 152 struct ieee80211_channel *channel, 153 u32 vht_cap_info, 154 const struct ieee802_11_elems *elems, 155 bool ignore_ht_channel_mismatch, 156 const struct ieee80211_conn_settings *conn, 157 struct cfg80211_chan_def *chandef) 158 { 159 const struct ieee80211_ht_operation *ht_oper = elems->ht_operation; 160 const struct ieee80211_vht_operation *vht_oper = elems->vht_operation; 161 const struct ieee80211_he_operation *he_oper = elems->he_operation; 162 const struct ieee80211_eht_operation *eht_oper = elems->eht_operation; 163 struct ieee80211_supported_band *sband = 164 sdata->local->hw.wiphy->bands[channel->band]; 165 struct cfg80211_chan_def vht_chandef; 166 bool no_vht = false; 167 u32 ht_cfreq; 168 169 *chandef = (struct cfg80211_chan_def) { 170 .chan = channel, 171 .width = NL80211_CHAN_WIDTH_20_NOHT, 172 .center_freq1 = channel->center_freq, 173 .freq1_offset = channel->freq_offset, 174 }; 175 176 /* get special S1G case out of the way */ 177 if (sband->band == NL80211_BAND_S1GHZ) { 178 if (!ieee80211_chandef_s1g_oper(elems->s1g_oper, chandef)) { 179 sdata_info(sdata, 180 "Missing S1G Operation Element? Trying operating == primary\n"); 181 chandef->width = ieee80211_s1g_channel_width(channel); 182 } 183 184 return IEEE80211_CONN_MODE_S1G; 185 } 186 187 /* get special 6 GHz case out of the way */ 188 if (sband->band == NL80211_BAND_6GHZ) { 189 enum ieee80211_conn_mode mode = IEEE80211_CONN_MODE_EHT; 190 191 /* this is an error */ 192 if (conn->mode < IEEE80211_CONN_MODE_HE) 193 return IEEE80211_CONN_MODE_LEGACY; 194 195 if (!elems->he_6ghz_capa || !elems->he_cap) { 196 sdata_info(sdata, 197 "HE 6 GHz AP is missing HE/HE 6 GHz band capability\n"); 198 return IEEE80211_CONN_MODE_LEGACY; 199 } 200 201 if (!eht_oper || !elems->eht_cap) { 202 eht_oper = NULL; 203 mode = IEEE80211_CONN_MODE_HE; 204 } 205 206 if (!ieee80211_chandef_he_6ghz_oper(sdata->local, he_oper, 207 eht_oper, chandef)) { 208 sdata_info(sdata, "bad HE/EHT 6 GHz operation\n"); 209 return IEEE80211_CONN_MODE_LEGACY; 210 } 211 212 return mode; 213 } 214 215 /* now we have the progression HT, VHT, ... */ 216 if (conn->mode < IEEE80211_CONN_MODE_HT) 217 return IEEE80211_CONN_MODE_LEGACY; 218 219 if (!ht_oper || !elems->ht_cap_elem) 220 return IEEE80211_CONN_MODE_LEGACY; 221 222 chandef->width = NL80211_CHAN_WIDTH_20; 223 224 ht_cfreq = ieee80211_channel_to_frequency(ht_oper->primary_chan, 225 channel->band); 226 /* check that channel matches the right operating channel */ 227 if (!ignore_ht_channel_mismatch && channel->center_freq != ht_cfreq) { 228 /* 229 * It's possible that some APs are confused here; 230 * Netgear WNDR3700 sometimes reports 4 higher than 231 * the actual channel in association responses, but 232 * since we look at probe response/beacon data here 233 * it should be OK. 234 */ 235 sdata_info(sdata, 236 "Wrong control channel: center-freq: %d ht-cfreq: %d ht->primary_chan: %d band: %d - Disabling HT\n", 237 channel->center_freq, ht_cfreq, 238 ht_oper->primary_chan, channel->band); 239 return IEEE80211_CONN_MODE_LEGACY; 240 } 241 242 ieee80211_chandef_ht_oper(ht_oper, chandef); 243 244 if (conn->mode < IEEE80211_CONN_MODE_VHT) 245 return IEEE80211_CONN_MODE_HT; 246 247 vht_chandef = *chandef; 248 249 /* 250 * having he_cap/he_oper parsed out implies we're at 251 * least operating as HE STA 252 */ 253 if (elems->he_cap && he_oper && 254 he_oper->he_oper_params & cpu_to_le32(IEEE80211_HE_OPERATION_VHT_OPER_INFO)) { 255 struct ieee80211_vht_operation he_oper_vht_cap; 256 257 /* 258 * Set only first 3 bytes (other 2 aren't used in 259 * ieee80211_chandef_vht_oper() anyway) 260 */ 261 memcpy(&he_oper_vht_cap, he_oper->optional, 3); 262 he_oper_vht_cap.basic_mcs_set = cpu_to_le16(0); 263 264 if (!ieee80211_chandef_vht_oper(&sdata->local->hw, vht_cap_info, 265 &he_oper_vht_cap, ht_oper, 266 &vht_chandef)) { 267 sdata_info(sdata, 268 "HE AP VHT information is invalid, disabling HE\n"); 269 /* this will cause us to re-parse as VHT STA */ 270 return IEEE80211_CONN_MODE_VHT; 271 } 272 } else if (!vht_oper || !elems->vht_cap_elem) { 273 if (sband->band == NL80211_BAND_5GHZ) { 274 sdata_info(sdata, 275 "VHT information is missing, disabling VHT\n"); 276 return IEEE80211_CONN_MODE_HT; 277 } 278 no_vht = true; 279 } else if (sband->band == NL80211_BAND_2GHZ) { 280 no_vht = true; 281 } else if (!ieee80211_chandef_vht_oper(&sdata->local->hw, 282 vht_cap_info, 283 vht_oper, ht_oper, 284 &vht_chandef)) { 285 sdata_info(sdata, 286 "AP VHT information is invalid, disabling VHT\n"); 287 return IEEE80211_CONN_MODE_HT; 288 } 289 290 if (!cfg80211_chandef_compatible(chandef, &vht_chandef)) { 291 sdata_info(sdata, 292 "AP VHT information doesn't match HT, disabling VHT\n"); 293 return IEEE80211_CONN_MODE_HT; 294 } 295 296 *chandef = vht_chandef; 297 298 /* stick to current max mode if we or the AP don't have HE */ 299 if (conn->mode < IEEE80211_CONN_MODE_HE || 300 !elems->he_operation || !elems->he_cap) { 301 if (no_vht) 302 return IEEE80211_CONN_MODE_HT; 303 return IEEE80211_CONN_MODE_VHT; 304 } 305 306 /* stick to HE if we or the AP don't have EHT */ 307 if (conn->mode < IEEE80211_CONN_MODE_EHT || 308 !eht_oper || !elems->eht_cap) 309 return IEEE80211_CONN_MODE_HE; 310 311 /* 312 * handle the case that the EHT operation indicates that it holds EHT 313 * operation information (in case that the channel width differs from 314 * the channel width reported in HT/VHT/HE). 315 */ 316 if (eht_oper->params & IEEE80211_EHT_OPER_INFO_PRESENT) { 317 struct cfg80211_chan_def eht_chandef = *chandef; 318 319 ieee80211_chandef_eht_oper((const void *)eht_oper->optional, 320 &eht_chandef); 321 322 eht_chandef.punctured = 323 ieee80211_eht_oper_dis_subchan_bitmap(eht_oper); 324 325 if (!cfg80211_chandef_valid(&eht_chandef)) { 326 sdata_info(sdata, 327 "AP EHT information is invalid, disabling EHT\n"); 328 return IEEE80211_CONN_MODE_HE; 329 } 330 331 if (!cfg80211_chandef_compatible(chandef, &eht_chandef)) { 332 sdata_info(sdata, 333 "AP EHT information doesn't match HT/VHT/HE, disabling EHT\n"); 334 return IEEE80211_CONN_MODE_HE; 335 } 336 337 *chandef = eht_chandef; 338 } 339 340 return IEEE80211_CONN_MODE_EHT; 341 } 342 343 static bool 344 ieee80211_verify_peer_he_mcs_support(struct ieee80211_sub_if_data *sdata, 345 const struct ieee80211_he_cap_elem *he_cap, 346 const struct ieee80211_he_operation *he_op) 347 { 348 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 349 u16 mcs_80_map_tx, mcs_80_map_rx; 350 u16 ap_min_req_set; 351 int nss; 352 353 if (!he_cap) 354 return false; 355 356 /* mcs_nss is right after he_cap info */ 357 he_mcs_nss_supp = (void *)(he_cap + 1); 358 359 mcs_80_map_tx = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 360 mcs_80_map_rx = le16_to_cpu(he_mcs_nss_supp->rx_mcs_80); 361 362 /* P802.11-REVme/D0.3 363 * 27.1.1 Introduction to the HE PHY 364 * ... 365 * An HE STA shall support the following features: 366 * ... 367 * Single spatial stream HE-MCSs 0 to 7 (transmit and receive) in all 368 * supported channel widths for HE SU PPDUs 369 */ 370 if ((mcs_80_map_tx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED || 371 (mcs_80_map_rx & 0x3) == IEEE80211_HE_MCS_NOT_SUPPORTED) { 372 sdata_info(sdata, 373 "Missing mandatory rates for 1 Nss, rx 0x%x, tx 0x%x, disable HE\n", 374 mcs_80_map_tx, mcs_80_map_rx); 375 return false; 376 } 377 378 if (!he_op) 379 return true; 380 381 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 382 383 /* 384 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 385 * zeroes, which is nonsense, and completely inconsistent with itself 386 * (it doesn't have 8 streams). Accept the settings in this case anyway. 387 */ 388 if (!ap_min_req_set) 389 return true; 390 391 /* make sure the AP is consistent with itself 392 * 393 * P802.11-REVme/D0.3 394 * 26.17.1 Basic HE BSS operation 395 * 396 * A STA that is operating in an HE BSS shall be able to receive and 397 * transmit at each of the <HE-MCS, NSS> tuple values indicated by the 398 * Basic HE-MCS And NSS Set field of the HE Operation parameter of the 399 * MLME-START.request primitive and shall be able to receive at each of 400 * the <HE-MCS, NSS> tuple values indicated by the Supported HE-MCS and 401 * NSS Set field in the HE Capabilities parameter of the MLMESTART.request 402 * primitive 403 */ 404 for (nss = 8; nss > 0; nss--) { 405 u8 ap_op_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 406 u8 ap_rx_val; 407 u8 ap_tx_val; 408 409 if (ap_op_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 410 continue; 411 412 ap_rx_val = (mcs_80_map_rx >> (2 * (nss - 1))) & 3; 413 ap_tx_val = (mcs_80_map_tx >> (2 * (nss - 1))) & 3; 414 415 if (ap_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 416 ap_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 417 ap_rx_val < ap_op_val || ap_tx_val < ap_op_val) { 418 sdata_info(sdata, 419 "Invalid rates for %d Nss, rx %d, tx %d oper %d, disable HE\n", 420 nss, ap_rx_val, ap_rx_val, ap_op_val); 421 return false; 422 } 423 } 424 425 return true; 426 } 427 428 static bool 429 ieee80211_verify_sta_he_mcs_support(struct ieee80211_sub_if_data *sdata, 430 struct ieee80211_supported_band *sband, 431 const struct ieee80211_he_operation *he_op) 432 { 433 const struct ieee80211_sta_he_cap *sta_he_cap = 434 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 435 u16 ap_min_req_set; 436 int i; 437 438 if (!sta_he_cap || !he_op) 439 return false; 440 441 ap_min_req_set = le16_to_cpu(he_op->he_mcs_nss_set); 442 443 /* 444 * Apparently iPhone 13 (at least iOS version 15.3.1) sets this to all 445 * zeroes, which is nonsense, and completely inconsistent with itself 446 * (it doesn't have 8 streams). Accept the settings in this case anyway. 447 */ 448 if (!ap_min_req_set) 449 return true; 450 451 /* Need to go over for 80MHz, 160MHz and for 80+80 */ 452 for (i = 0; i < 3; i++) { 453 const struct ieee80211_he_mcs_nss_supp *sta_mcs_nss_supp = 454 &sta_he_cap->he_mcs_nss_supp; 455 u16 sta_mcs_map_rx = 456 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i]); 457 u16 sta_mcs_map_tx = 458 le16_to_cpu(((__le16 *)sta_mcs_nss_supp)[2 * i + 1]); 459 u8 nss; 460 bool verified = true; 461 462 /* 463 * For each band there is a maximum of 8 spatial streams 464 * possible. Each of the sta_mcs_map_* is a 16-bit struct built 465 * of 2 bits per NSS (1-8), with the values defined in enum 466 * ieee80211_he_mcs_support. Need to make sure STA TX and RX 467 * capabilities aren't less than the AP's minimum requirements 468 * for this HE BSS per SS. 469 * It is enough to find one such band that meets the reqs. 470 */ 471 for (nss = 8; nss > 0; nss--) { 472 u8 sta_rx_val = (sta_mcs_map_rx >> (2 * (nss - 1))) & 3; 473 u8 sta_tx_val = (sta_mcs_map_tx >> (2 * (nss - 1))) & 3; 474 u8 ap_val = (ap_min_req_set >> (2 * (nss - 1))) & 3; 475 476 if (ap_val == IEEE80211_HE_MCS_NOT_SUPPORTED) 477 continue; 478 479 /* 480 * Make sure the HE AP doesn't require MCSs that aren't 481 * supported by the client as required by spec 482 * 483 * P802.11-REVme/D0.3 484 * 26.17.1 Basic HE BSS operation 485 * 486 * An HE STA shall not attempt to join * (MLME-JOIN.request primitive) 487 * a BSS, unless it supports (i.e., is able to both transmit and 488 * receive using) all of the <HE-MCS, NSS> tuples in the basic 489 * HE-MCS and NSS set. 490 */ 491 if (sta_rx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 492 sta_tx_val == IEEE80211_HE_MCS_NOT_SUPPORTED || 493 (ap_val > sta_rx_val) || (ap_val > sta_tx_val)) { 494 verified = false; 495 break; 496 } 497 } 498 499 if (verified) 500 return true; 501 } 502 503 /* If here, STA doesn't meet AP's HE min requirements */ 504 return false; 505 } 506 507 static u8 508 ieee80211_get_eht_cap_mcs_nss(const struct ieee80211_sta_he_cap *sta_he_cap, 509 const struct ieee80211_sta_eht_cap *sta_eht_cap, 510 unsigned int idx, int bw) 511 { 512 u8 he_phy_cap0 = sta_he_cap->he_cap_elem.phy_cap_info[0]; 513 u8 eht_phy_cap0 = sta_eht_cap->eht_cap_elem.phy_cap_info[0]; 514 515 /* handle us being a 20 MHz-only EHT STA - with four values 516 * for MCS 0-7, 8-9, 10-11, 12-13. 517 */ 518 if (!(he_phy_cap0 & IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_MASK_ALL)) 519 return sta_eht_cap->eht_mcs_nss_supp.only_20mhz.rx_tx_max_nss[idx]; 520 521 /* the others have MCS 0-9 together, rather than separately from 0-7 */ 522 if (idx > 0) 523 idx--; 524 525 switch (bw) { 526 case 0: 527 return sta_eht_cap->eht_mcs_nss_supp.bw._80.rx_tx_max_nss[idx]; 528 case 1: 529 if (!(he_phy_cap0 & 530 (IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G | 531 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G))) 532 return 0xff; /* pass check */ 533 return sta_eht_cap->eht_mcs_nss_supp.bw._160.rx_tx_max_nss[idx]; 534 case 2: 535 if (!(eht_phy_cap0 & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ)) 536 return 0xff; /* pass check */ 537 return sta_eht_cap->eht_mcs_nss_supp.bw._320.rx_tx_max_nss[idx]; 538 } 539 540 WARN_ON(1); 541 return 0; 542 } 543 544 static bool 545 ieee80211_verify_sta_eht_mcs_support(struct ieee80211_sub_if_data *sdata, 546 struct ieee80211_supported_band *sband, 547 const struct ieee80211_eht_operation *eht_op) 548 { 549 const struct ieee80211_sta_he_cap *sta_he_cap = 550 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 551 const struct ieee80211_sta_eht_cap *sta_eht_cap = 552 ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 553 const struct ieee80211_eht_mcs_nss_supp_20mhz_only *req; 554 unsigned int i; 555 556 if (!sta_he_cap || !sta_eht_cap || !eht_op) 557 return false; 558 559 req = &eht_op->basic_mcs_nss; 560 561 for (i = 0; i < ARRAY_SIZE(req->rx_tx_max_nss); i++) { 562 u8 req_rx_nss, req_tx_nss; 563 unsigned int bw; 564 565 req_rx_nss = u8_get_bits(req->rx_tx_max_nss[i], 566 IEEE80211_EHT_MCS_NSS_RX); 567 req_tx_nss = u8_get_bits(req->rx_tx_max_nss[i], 568 IEEE80211_EHT_MCS_NSS_TX); 569 570 for (bw = 0; bw < 3; bw++) { 571 u8 have, have_rx_nss, have_tx_nss; 572 573 have = ieee80211_get_eht_cap_mcs_nss(sta_he_cap, 574 sta_eht_cap, 575 i, bw); 576 have_rx_nss = u8_get_bits(have, 577 IEEE80211_EHT_MCS_NSS_RX); 578 have_tx_nss = u8_get_bits(have, 579 IEEE80211_EHT_MCS_NSS_TX); 580 581 if (req_rx_nss > have_rx_nss || 582 req_tx_nss > have_tx_nss) 583 return false; 584 } 585 } 586 587 return true; 588 } 589 590 static bool ieee80211_chandef_usable(struct ieee80211_sub_if_data *sdata, 591 const struct cfg80211_chan_def *chandef, 592 u32 prohibited_flags) 593 { 594 if (!cfg80211_chandef_usable(sdata->local->hw.wiphy, 595 chandef, prohibited_flags)) 596 return false; 597 598 if (chandef->punctured && 599 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING)) 600 return false; 601 602 if (chandef->punctured && chandef->chan->band == NL80211_BAND_5GHZ && 603 ieee80211_hw_check(&sdata->local->hw, DISALLOW_PUNCTURING_5GHZ)) 604 return false; 605 606 return true; 607 } 608 609 static struct ieee802_11_elems * 610 ieee80211_determine_chan_mode(struct ieee80211_sub_if_data *sdata, 611 struct ieee80211_conn_settings *conn, 612 struct cfg80211_bss *cbss, int link_id, 613 struct ieee80211_chan_req *chanreq) 614 { 615 const struct cfg80211_bss_ies *ies = rcu_dereference(cbss->ies); 616 struct ieee80211_bss *bss = (void *)cbss->priv; 617 struct ieee80211_channel *channel = cbss->channel; 618 struct ieee80211_elems_parse_params parse_params = { 619 .link_id = -1, 620 .from_ap = true, 621 .start = ies->data, 622 .len = ies->len, 623 }; 624 struct ieee802_11_elems *elems; 625 struct ieee80211_supported_band *sband; 626 struct cfg80211_chan_def ap_chandef; 627 enum ieee80211_conn_mode ap_mode; 628 int ret; 629 630 again: 631 parse_params.mode = conn->mode; 632 elems = ieee802_11_parse_elems_full(&parse_params); 633 if (!elems) 634 return ERR_PTR(-ENOMEM); 635 636 ap_mode = ieee80211_determine_ap_chan(sdata, channel, bss->vht_cap_info, 637 elems, false, conn, &ap_chandef); 638 639 /* this should be impossible since parsing depends on our mode */ 640 if (WARN_ON(ap_mode > conn->mode)) { 641 ret = -EINVAL; 642 goto free; 643 } 644 645 if (conn->mode != ap_mode) { 646 conn->mode = ap_mode; 647 kfree(elems); 648 goto again; 649 } 650 651 mlme_link_id_dbg(sdata, link_id, "determined AP %pM to be %s\n", 652 cbss->bssid, ieee80211_conn_mode_str(ap_mode)); 653 654 sband = sdata->local->hw.wiphy->bands[channel->band]; 655 656 switch (channel->band) { 657 case NL80211_BAND_S1GHZ: 658 if (WARN_ON(ap_mode != IEEE80211_CONN_MODE_S1G)) { 659 ret = -EINVAL; 660 goto free; 661 } 662 return elems; 663 case NL80211_BAND_6GHZ: 664 if (ap_mode < IEEE80211_CONN_MODE_HE) { 665 sdata_info(sdata, 666 "Rejecting non-HE 6/7 GHz connection"); 667 ret = -EINVAL; 668 goto free; 669 } 670 break; 671 default: 672 if (WARN_ON(ap_mode == IEEE80211_CONN_MODE_S1G)) { 673 ret = -EINVAL; 674 goto free; 675 } 676 } 677 678 switch (ap_mode) { 679 case IEEE80211_CONN_MODE_S1G: 680 WARN_ON(1); 681 ret = -EINVAL; 682 goto free; 683 case IEEE80211_CONN_MODE_LEGACY: 684 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 685 break; 686 case IEEE80211_CONN_MODE_HT: 687 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 688 conn->bw_limit, 689 IEEE80211_CONN_BW_LIMIT_40); 690 break; 691 case IEEE80211_CONN_MODE_VHT: 692 case IEEE80211_CONN_MODE_HE: 693 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 694 conn->bw_limit, 695 IEEE80211_CONN_BW_LIMIT_160); 696 break; 697 case IEEE80211_CONN_MODE_EHT: 698 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 699 conn->bw_limit, 700 IEEE80211_CONN_BW_LIMIT_320); 701 break; 702 } 703 704 chanreq->oper = ap_chandef; 705 706 /* wider-bandwidth OFDMA is only done in EHT */ 707 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 708 !(sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW)) 709 chanreq->ap = ap_chandef; 710 else 711 chanreq->ap.chan = NULL; 712 713 while (!ieee80211_chandef_usable(sdata, &chanreq->oper, 714 IEEE80211_CHAN_DISABLED)) { 715 if (WARN_ON(chanreq->oper.width == NL80211_CHAN_WIDTH_20_NOHT)) { 716 ret = -EINVAL; 717 goto free; 718 } 719 720 ieee80211_chanreq_downgrade(chanreq, conn); 721 } 722 723 if (conn->mode >= IEEE80211_CONN_MODE_HE && 724 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 725 IEEE80211_CHAN_NO_HE)) { 726 conn->mode = IEEE80211_CONN_MODE_VHT; 727 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 728 conn->bw_limit, 729 IEEE80211_CONN_BW_LIMIT_160); 730 } 731 732 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 733 !cfg80211_chandef_usable(sdata->wdev.wiphy, &chanreq->oper, 734 IEEE80211_CHAN_NO_EHT)) { 735 conn->mode = IEEE80211_CONN_MODE_HE; 736 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 737 conn->bw_limit, 738 IEEE80211_CONN_BW_LIMIT_160); 739 } 740 741 if (chanreq->oper.width != ap_chandef.width || ap_mode != conn->mode) 742 sdata_info(sdata, 743 "regulatory prevented using AP config, downgraded\n"); 744 745 if (conn->mode >= IEEE80211_CONN_MODE_HE && 746 (!ieee80211_verify_peer_he_mcs_support(sdata, (void *)elems->he_cap, 747 elems->he_operation) || 748 !ieee80211_verify_sta_he_mcs_support(sdata, sband, 749 elems->he_operation))) { 750 conn->mode = IEEE80211_CONN_MODE_VHT; 751 sdata_info(sdata, "required MCSes not supported, disabling HE\n"); 752 } 753 754 if (conn->mode >= IEEE80211_CONN_MODE_EHT && 755 !ieee80211_verify_sta_eht_mcs_support(sdata, sband, 756 elems->eht_operation)) { 757 conn->mode = IEEE80211_CONN_MODE_HE; 758 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 759 conn->bw_limit, 760 IEEE80211_CONN_BW_LIMIT_160); 761 sdata_info(sdata, "required MCSes not supported, disabling EHT\n"); 762 } 763 764 /* the mode can only decrease, so this must terminate */ 765 if (ap_mode != conn->mode) { 766 kfree(elems); 767 goto again; 768 } 769 770 mlme_link_id_dbg(sdata, link_id, 771 "connecting with %s mode, max bandwidth %d MHz\n", 772 ieee80211_conn_mode_str(conn->mode), 773 20 * (1 << conn->bw_limit)); 774 775 if (WARN_ON_ONCE(!cfg80211_chandef_valid(&chanreq->oper))) { 776 ret = -EINVAL; 777 goto free; 778 } 779 780 return elems; 781 free: 782 kfree(elems); 783 return ERR_PTR(ret); 784 } 785 786 static int ieee80211_config_bw(struct ieee80211_link_data *link, 787 struct ieee802_11_elems *elems, 788 bool update, u64 *changed) 789 { 790 struct ieee80211_channel *channel = link->conf->chanreq.oper.chan; 791 struct ieee80211_sub_if_data *sdata = link->sdata; 792 struct ieee80211_chan_req chanreq = {}; 793 enum ieee80211_conn_mode ap_mode; 794 u32 vht_cap_info = 0; 795 u16 ht_opmode; 796 int ret; 797 798 /* don't track any bandwidth changes in legacy/S1G modes */ 799 if (link->u.mgd.conn.mode == IEEE80211_CONN_MODE_LEGACY || 800 link->u.mgd.conn.mode == IEEE80211_CONN_MODE_S1G) 801 return 0; 802 803 if (elems->vht_cap_elem) 804 vht_cap_info = le32_to_cpu(elems->vht_cap_elem->vht_cap_info); 805 806 ap_mode = ieee80211_determine_ap_chan(sdata, channel, vht_cap_info, 807 elems, true, &link->u.mgd.conn, 808 &chanreq.ap); 809 810 if (ap_mode != link->u.mgd.conn.mode) { 811 link_info(link, 812 "AP appears to change mode (expected %s, found %s), disconnect\n", 813 ieee80211_conn_mode_str(link->u.mgd.conn.mode), 814 ieee80211_conn_mode_str(ap_mode)); 815 return -EINVAL; 816 } 817 818 chanreq.oper = chanreq.ap; 819 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT || 820 sdata->vif.driver_flags & IEEE80211_VIF_IGNORE_OFDMA_WIDER_BW) 821 chanreq.ap.chan = NULL; 822 823 /* 824 * if HT operation mode changed store the new one - 825 * this may be applicable even if channel is identical 826 */ 827 if (elems->ht_operation) { 828 ht_opmode = le16_to_cpu(elems->ht_operation->operation_mode); 829 if (link->conf->ht_operation_mode != ht_opmode) { 830 *changed |= BSS_CHANGED_HT; 831 link->conf->ht_operation_mode = ht_opmode; 832 } 833 } 834 835 /* 836 * Downgrade the new channel if we associated with restricted 837 * bandwidth capabilities. For example, if we associated as a 838 * 20 MHz STA to a 40 MHz AP (due to regulatory, capabilities 839 * or config reasons) then switching to a 40 MHz channel now 840 * won't do us any good -- we couldn't use it with the AP. 841 */ 842 while (link->u.mgd.conn.bw_limit < 843 ieee80211_min_bw_limit_from_chandef(&chanreq.oper)) 844 ieee80211_chandef_downgrade(&chanreq.oper, NULL); 845 846 if (ieee80211_chanreq_identical(&chanreq, &link->conf->chanreq)) 847 return 0; 848 849 link_info(link, 850 "AP %pM changed bandwidth, new used config is %d.%03d MHz, width %d (%d.%03d/%d MHz)\n", 851 link->u.mgd.bssid, chanreq.oper.chan->center_freq, 852 chanreq.oper.chan->freq_offset, chanreq.oper.width, 853 chanreq.oper.center_freq1, chanreq.oper.freq1_offset, 854 chanreq.oper.center_freq2); 855 856 if (!cfg80211_chandef_valid(&chanreq.oper)) { 857 sdata_info(sdata, 858 "AP %pM changed caps/bw in a way we can't support - disconnect\n", 859 link->u.mgd.bssid); 860 return -EINVAL; 861 } 862 863 if (!update) { 864 link->conf->chanreq = chanreq; 865 return 0; 866 } 867 868 /* 869 * We're tracking the current AP here, so don't do any further checks 870 * here. This keeps us from playing ping-pong with regulatory, without 871 * it the following can happen (for example): 872 * - connect to an AP with 80 MHz, world regdom allows 80 MHz 873 * - AP advertises regdom US 874 * - CRDA loads regdom US with 80 MHz prohibited (old database) 875 * - we detect an unsupported channel and disconnect 876 * - disconnect causes CRDA to reload world regdomain and the game 877 * starts anew. 878 * (see https://bugzilla.kernel.org/show_bug.cgi?id=70881) 879 * 880 * It seems possible that there are still scenarios with CSA or real 881 * bandwidth changes where a this could happen, but those cases are 882 * less common and wouldn't completely prevent using the AP. 883 */ 884 885 ret = ieee80211_link_change_chanreq(link, &chanreq, changed); 886 if (ret) { 887 sdata_info(sdata, 888 "AP %pM changed bandwidth to incompatible one - disconnect\n", 889 link->u.mgd.bssid); 890 return ret; 891 } 892 893 cfg80211_schedule_channels_check(&sdata->wdev); 894 return 0; 895 } 896 897 /* frame sending functions */ 898 899 static void ieee80211_add_ht_ie(struct ieee80211_sub_if_data *sdata, 900 struct sk_buff *skb, u8 ap_ht_param, 901 struct ieee80211_supported_band *sband, 902 struct ieee80211_channel *channel, 903 enum ieee80211_smps_mode smps, 904 const struct ieee80211_conn_settings *conn) 905 { 906 u8 *pos; 907 u32 flags = channel->flags; 908 u16 cap; 909 struct ieee80211_sta_ht_cap ht_cap; 910 911 BUILD_BUG_ON(sizeof(ht_cap) != sizeof(sband->ht_cap)); 912 913 memcpy(&ht_cap, &sband->ht_cap, sizeof(ht_cap)); 914 ieee80211_apply_htcap_overrides(sdata, &ht_cap); 915 916 /* determine capability flags */ 917 cap = ht_cap.cap; 918 919 switch (ap_ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) { 920 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE: 921 if (flags & IEEE80211_CHAN_NO_HT40PLUS) { 922 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 923 cap &= ~IEEE80211_HT_CAP_SGI_40; 924 } 925 break; 926 case IEEE80211_HT_PARAM_CHA_SEC_BELOW: 927 if (flags & IEEE80211_CHAN_NO_HT40MINUS) { 928 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 929 cap &= ~IEEE80211_HT_CAP_SGI_40; 930 } 931 break; 932 } 933 934 /* 935 * If 40 MHz was disabled associate as though we weren't 936 * capable of 40 MHz -- some broken APs will never fall 937 * back to trying to transmit in 20 MHz. 938 */ 939 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_20) { 940 cap &= ~IEEE80211_HT_CAP_SUP_WIDTH_20_40; 941 cap &= ~IEEE80211_HT_CAP_SGI_40; 942 } 943 944 /* set SM PS mode properly */ 945 cap &= ~IEEE80211_HT_CAP_SM_PS; 946 switch (smps) { 947 case IEEE80211_SMPS_AUTOMATIC: 948 case IEEE80211_SMPS_NUM_MODES: 949 WARN_ON(1); 950 fallthrough; 951 case IEEE80211_SMPS_OFF: 952 cap |= WLAN_HT_CAP_SM_PS_DISABLED << 953 IEEE80211_HT_CAP_SM_PS_SHIFT; 954 break; 955 case IEEE80211_SMPS_STATIC: 956 cap |= WLAN_HT_CAP_SM_PS_STATIC << 957 IEEE80211_HT_CAP_SM_PS_SHIFT; 958 break; 959 case IEEE80211_SMPS_DYNAMIC: 960 cap |= WLAN_HT_CAP_SM_PS_DYNAMIC << 961 IEEE80211_HT_CAP_SM_PS_SHIFT; 962 break; 963 } 964 965 /* reserve and fill IE */ 966 pos = skb_put(skb, sizeof(struct ieee80211_ht_cap) + 2); 967 ieee80211_ie_build_ht_cap(pos, &ht_cap, cap); 968 } 969 970 /* This function determines vht capability flags for the association 971 * and builds the IE. 972 * Note - the function returns true to own the MU-MIMO capability 973 */ 974 static bool ieee80211_add_vht_ie(struct ieee80211_sub_if_data *sdata, 975 struct sk_buff *skb, 976 struct ieee80211_supported_band *sband, 977 struct ieee80211_vht_cap *ap_vht_cap, 978 const struct ieee80211_conn_settings *conn) 979 { 980 struct ieee80211_local *local = sdata->local; 981 u8 *pos; 982 u32 cap; 983 struct ieee80211_sta_vht_cap vht_cap; 984 u32 mask, ap_bf_sts, our_bf_sts; 985 bool mu_mimo_owner = false; 986 987 BUILD_BUG_ON(sizeof(vht_cap) != sizeof(sband->vht_cap)); 988 989 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 990 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 991 992 /* determine capability flags */ 993 cap = vht_cap.cap; 994 995 if (conn->bw_limit <= IEEE80211_CONN_BW_LIMIT_80) { 996 cap &= ~IEEE80211_VHT_CAP_SHORT_GI_160; 997 cap &= ~IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK; 998 } 999 1000 /* 1001 * Some APs apparently get confused if our capabilities are better 1002 * than theirs, so restrict what we advertise in the assoc request. 1003 */ 1004 if (!(ap_vht_cap->vht_cap_info & 1005 cpu_to_le32(IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE))) 1006 cap &= ~(IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 1007 IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE); 1008 else if (!(ap_vht_cap->vht_cap_info & 1009 cpu_to_le32(IEEE80211_VHT_CAP_MU_BEAMFORMER_CAPABLE))) 1010 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1011 1012 /* 1013 * If some other vif is using the MU-MIMO capability we cannot associate 1014 * using MU-MIMO - this will lead to contradictions in the group-id 1015 * mechanism. 1016 * Ownership is defined since association request, in order to avoid 1017 * simultaneous associations with MU-MIMO. 1018 */ 1019 if (cap & IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE) { 1020 bool disable_mu_mimo = false; 1021 struct ieee80211_sub_if_data *other; 1022 1023 list_for_each_entry_rcu(other, &local->interfaces, list) { 1024 if (other->vif.bss_conf.mu_mimo_owner) { 1025 disable_mu_mimo = true; 1026 break; 1027 } 1028 } 1029 if (disable_mu_mimo) 1030 cap &= ~IEEE80211_VHT_CAP_MU_BEAMFORMEE_CAPABLE; 1031 else 1032 mu_mimo_owner = true; 1033 } 1034 1035 mask = IEEE80211_VHT_CAP_BEAMFORMEE_STS_MASK; 1036 1037 ap_bf_sts = le32_to_cpu(ap_vht_cap->vht_cap_info) & mask; 1038 our_bf_sts = cap & mask; 1039 1040 if (ap_bf_sts < our_bf_sts) { 1041 cap &= ~mask; 1042 cap |= ap_bf_sts; 1043 } 1044 1045 /* reserve and fill IE */ 1046 pos = skb_put(skb, sizeof(struct ieee80211_vht_cap) + 2); 1047 ieee80211_ie_build_vht_cap(pos, &vht_cap, cap); 1048 1049 return mu_mimo_owner; 1050 } 1051 1052 static void ieee80211_assoc_add_rates(struct sk_buff *skb, 1053 enum nl80211_chan_width width, 1054 struct ieee80211_supported_band *sband, 1055 struct ieee80211_mgd_assoc_data *assoc_data) 1056 { 1057 u32 rates; 1058 1059 if (assoc_data->supp_rates_len) { 1060 /* 1061 * Get all rates supported by the device and the AP as 1062 * some APs don't like getting a superset of their rates 1063 * in the association request (e.g. D-Link DAP 1353 in 1064 * b-only mode)... 1065 */ 1066 ieee80211_parse_bitrates(width, sband, 1067 assoc_data->supp_rates, 1068 assoc_data->supp_rates_len, 1069 &rates); 1070 } else { 1071 /* 1072 * In case AP not provide any supported rates information 1073 * before association, we send information element(s) with 1074 * all rates that we support. 1075 */ 1076 rates = ~0; 1077 } 1078 1079 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1080 WLAN_EID_SUPP_RATES); 1081 ieee80211_put_srates_elem(skb, sband, 0, 0, ~rates, 1082 WLAN_EID_EXT_SUPP_RATES); 1083 } 1084 1085 static size_t ieee80211_add_before_ht_elems(struct sk_buff *skb, 1086 const u8 *elems, 1087 size_t elems_len, 1088 size_t offset) 1089 { 1090 size_t noffset; 1091 1092 static const u8 before_ht[] = { 1093 WLAN_EID_SSID, 1094 WLAN_EID_SUPP_RATES, 1095 WLAN_EID_EXT_SUPP_RATES, 1096 WLAN_EID_PWR_CAPABILITY, 1097 WLAN_EID_SUPPORTED_CHANNELS, 1098 WLAN_EID_RSN, 1099 WLAN_EID_QOS_CAPA, 1100 WLAN_EID_RRM_ENABLED_CAPABILITIES, 1101 WLAN_EID_MOBILITY_DOMAIN, 1102 WLAN_EID_FAST_BSS_TRANSITION, /* reassoc only */ 1103 WLAN_EID_RIC_DATA, /* reassoc only */ 1104 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1105 }; 1106 static const u8 after_ric[] = { 1107 WLAN_EID_SUPPORTED_REGULATORY_CLASSES, 1108 WLAN_EID_HT_CAPABILITY, 1109 WLAN_EID_BSS_COEX_2040, 1110 /* luckily this is almost always there */ 1111 WLAN_EID_EXT_CAPABILITY, 1112 WLAN_EID_QOS_TRAFFIC_CAPA, 1113 WLAN_EID_TIM_BCAST_REQ, 1114 WLAN_EID_INTERWORKING, 1115 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1116 WLAN_EID_VHT_CAPABILITY, 1117 WLAN_EID_OPMODE_NOTIF, 1118 }; 1119 1120 if (!elems_len) 1121 return offset; 1122 1123 noffset = ieee80211_ie_split_ric(elems, elems_len, 1124 before_ht, 1125 ARRAY_SIZE(before_ht), 1126 after_ric, 1127 ARRAY_SIZE(after_ric), 1128 offset); 1129 skb_put_data(skb, elems + offset, noffset - offset); 1130 1131 return noffset; 1132 } 1133 1134 static size_t ieee80211_add_before_vht_elems(struct sk_buff *skb, 1135 const u8 *elems, 1136 size_t elems_len, 1137 size_t offset) 1138 { 1139 static const u8 before_vht[] = { 1140 /* 1141 * no need to list the ones split off before HT 1142 * or generated here 1143 */ 1144 WLAN_EID_BSS_COEX_2040, 1145 WLAN_EID_EXT_CAPABILITY, 1146 WLAN_EID_QOS_TRAFFIC_CAPA, 1147 WLAN_EID_TIM_BCAST_REQ, 1148 WLAN_EID_INTERWORKING, 1149 /* 60 GHz (Multi-band, DMG, MMS) can't happen */ 1150 }; 1151 size_t noffset; 1152 1153 if (!elems_len) 1154 return offset; 1155 1156 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1157 noffset = ieee80211_ie_split(elems, elems_len, 1158 before_vht, ARRAY_SIZE(before_vht), 1159 offset); 1160 skb_put_data(skb, elems + offset, noffset - offset); 1161 1162 return noffset; 1163 } 1164 1165 static size_t ieee80211_add_before_he_elems(struct sk_buff *skb, 1166 const u8 *elems, 1167 size_t elems_len, 1168 size_t offset) 1169 { 1170 static const u8 before_he[] = { 1171 /* 1172 * no need to list the ones split off before VHT 1173 * or generated here 1174 */ 1175 WLAN_EID_OPMODE_NOTIF, 1176 WLAN_EID_EXTENSION, WLAN_EID_EXT_FUTURE_CHAN_GUIDANCE, 1177 /* 11ai elements */ 1178 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_SESSION, 1179 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_PUBLIC_KEY, 1180 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_KEY_CONFIRM, 1181 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_HLP_CONTAINER, 1182 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_IP_ADDR_ASSIGN, 1183 /* TODO: add 11ah/11aj/11ak elements */ 1184 }; 1185 size_t noffset; 1186 1187 if (!elems_len) 1188 return offset; 1189 1190 /* RIC already taken care of in ieee80211_add_before_ht_elems() */ 1191 noffset = ieee80211_ie_split(elems, elems_len, 1192 before_he, ARRAY_SIZE(before_he), 1193 offset); 1194 skb_put_data(skb, elems + offset, noffset - offset); 1195 1196 return noffset; 1197 } 1198 1199 #define PRESENT_ELEMS_MAX 8 1200 #define PRESENT_ELEM_EXT_OFFS 0x100 1201 1202 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1203 struct sk_buff *skb, u16 capab, 1204 const struct element *ext_capa, 1205 const u16 *present_elems); 1206 1207 static size_t ieee80211_assoc_link_elems(struct ieee80211_sub_if_data *sdata, 1208 struct sk_buff *skb, u16 *capab, 1209 const struct element *ext_capa, 1210 const u8 *extra_elems, 1211 size_t extra_elems_len, 1212 unsigned int link_id, 1213 struct ieee80211_link_data *link, 1214 u16 *present_elems) 1215 { 1216 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1217 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1218 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1219 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1220 struct ieee80211_channel *chan = cbss->channel; 1221 const struct ieee80211_sband_iftype_data *iftd; 1222 struct ieee80211_local *local = sdata->local; 1223 struct ieee80211_supported_band *sband; 1224 enum nl80211_chan_width width = NL80211_CHAN_WIDTH_20; 1225 struct ieee80211_chanctx_conf *chanctx_conf; 1226 enum ieee80211_smps_mode smps_mode; 1227 u16 orig_capab = *capab; 1228 size_t offset = 0; 1229 int present_elems_len = 0; 1230 u8 *pos; 1231 int i; 1232 1233 #define ADD_PRESENT_ELEM(id) do { \ 1234 /* need a last for termination - we use 0 == SSID */ \ 1235 if (!WARN_ON(present_elems_len >= PRESENT_ELEMS_MAX - 1)) \ 1236 present_elems[present_elems_len++] = (id); \ 1237 } while (0) 1238 #define ADD_PRESENT_EXT_ELEM(id) ADD_PRESENT_ELEM(PRESENT_ELEM_EXT_OFFS | (id)) 1239 1240 if (link) 1241 smps_mode = link->smps_mode; 1242 else if (sdata->u.mgd.powersave) 1243 smps_mode = IEEE80211_SMPS_DYNAMIC; 1244 else 1245 smps_mode = IEEE80211_SMPS_OFF; 1246 1247 if (link) { 1248 /* 1249 * 5/10 MHz scenarios are only viable without MLO, in which 1250 * case this pointer should be used ... All of this is a bit 1251 * unclear though, not sure this even works at all. 1252 */ 1253 rcu_read_lock(); 1254 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 1255 if (chanctx_conf) 1256 width = chanctx_conf->def.width; 1257 rcu_read_unlock(); 1258 } 1259 1260 sband = local->hw.wiphy->bands[chan->band]; 1261 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1262 1263 if (sband->band == NL80211_BAND_2GHZ) { 1264 *capab |= WLAN_CAPABILITY_SHORT_SLOT_TIME; 1265 *capab |= WLAN_CAPABILITY_SHORT_PREAMBLE; 1266 } 1267 1268 if ((cbss->capability & WLAN_CAPABILITY_SPECTRUM_MGMT) && 1269 ieee80211_hw_check(&local->hw, SPECTRUM_MGMT)) 1270 *capab |= WLAN_CAPABILITY_SPECTRUM_MGMT; 1271 1272 if (sband->band != NL80211_BAND_S1GHZ) 1273 ieee80211_assoc_add_rates(skb, width, sband, assoc_data); 1274 1275 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT || 1276 *capab & WLAN_CAPABILITY_RADIO_MEASURE) { 1277 struct cfg80211_chan_def chandef = { 1278 .width = width, 1279 .chan = chan, 1280 }; 1281 1282 pos = skb_put(skb, 4); 1283 *pos++ = WLAN_EID_PWR_CAPABILITY; 1284 *pos++ = 2; 1285 *pos++ = 0; /* min tx power */ 1286 /* max tx power */ 1287 *pos++ = ieee80211_chandef_max_power(&chandef); 1288 ADD_PRESENT_ELEM(WLAN_EID_PWR_CAPABILITY); 1289 } 1290 1291 /* 1292 * Per spec, we shouldn't include the list of channels if we advertise 1293 * support for extended channel switching, but we've always done that; 1294 * (for now?) apply this restriction only on the (new) 6 GHz band. 1295 */ 1296 if (*capab & WLAN_CAPABILITY_SPECTRUM_MGMT && 1297 (sband->band != NL80211_BAND_6GHZ || 1298 !ext_capa || ext_capa->datalen < 1 || 1299 !(ext_capa->data[0] & WLAN_EXT_CAPA1_EXT_CHANNEL_SWITCHING))) { 1300 /* TODO: get this in reg domain format */ 1301 pos = skb_put(skb, 2 * sband->n_channels + 2); 1302 *pos++ = WLAN_EID_SUPPORTED_CHANNELS; 1303 *pos++ = 2 * sband->n_channels; 1304 for (i = 0; i < sband->n_channels; i++) { 1305 int cf = sband->channels[i].center_freq; 1306 1307 *pos++ = ieee80211_frequency_to_channel(cf); 1308 *pos++ = 1; /* one channel in the subband*/ 1309 } 1310 ADD_PRESENT_ELEM(WLAN_EID_SUPPORTED_CHANNELS); 1311 } 1312 1313 /* if present, add any custom IEs that go before HT */ 1314 offset = ieee80211_add_before_ht_elems(skb, extra_elems, 1315 extra_elems_len, 1316 offset); 1317 1318 if (sband->band != NL80211_BAND_6GHZ && 1319 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HT) { 1320 ieee80211_add_ht_ie(sdata, skb, 1321 assoc_data->link[link_id].ap_ht_param, 1322 sband, chan, smps_mode, 1323 &assoc_data->link[link_id].conn); 1324 ADD_PRESENT_ELEM(WLAN_EID_HT_CAPABILITY); 1325 } 1326 1327 /* if present, add any custom IEs that go before VHT */ 1328 offset = ieee80211_add_before_vht_elems(skb, extra_elems, 1329 extra_elems_len, 1330 offset); 1331 1332 if (sband->band != NL80211_BAND_6GHZ && 1333 assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_VHT && 1334 sband->vht_cap.vht_supported) { 1335 bool mu_mimo_owner = 1336 ieee80211_add_vht_ie(sdata, skb, sband, 1337 &assoc_data->link[link_id].ap_vht_cap, 1338 &assoc_data->link[link_id].conn); 1339 1340 if (link) 1341 link->conf->mu_mimo_owner = mu_mimo_owner; 1342 ADD_PRESENT_ELEM(WLAN_EID_VHT_CAPABILITY); 1343 } 1344 1345 /* if present, add any custom IEs that go before HE */ 1346 offset = ieee80211_add_before_he_elems(skb, extra_elems, 1347 extra_elems_len, 1348 offset); 1349 1350 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_HE) { 1351 ieee80211_put_he_cap(skb, sdata, sband, 1352 &assoc_data->link[link_id].conn); 1353 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_HE_CAPABILITY); 1354 ieee80211_put_he_6ghz_cap(skb, sdata, smps_mode); 1355 } 1356 1357 /* 1358 * careful - need to know about all the present elems before 1359 * calling ieee80211_assoc_add_ml_elem(), so add this one if 1360 * we're going to put it after the ML element 1361 */ 1362 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1363 ADD_PRESENT_EXT_ELEM(WLAN_EID_EXT_EHT_CAPABILITY); 1364 1365 if (link_id == assoc_data->assoc_link_id) 1366 ieee80211_assoc_add_ml_elem(sdata, skb, orig_capab, ext_capa, 1367 present_elems); 1368 1369 /* crash if somebody gets it wrong */ 1370 present_elems = NULL; 1371 1372 if (assoc_data->link[link_id].conn.mode >= IEEE80211_CONN_MODE_EHT) 1373 ieee80211_put_eht_cap(skb, sdata, sband, 1374 &assoc_data->link[link_id].conn); 1375 1376 if (sband->band == NL80211_BAND_S1GHZ) { 1377 ieee80211_add_aid_request_ie(sdata, skb); 1378 ieee80211_add_s1g_capab_ie(sdata, &sband->s1g_cap, skb); 1379 } 1380 1381 if (iftd && iftd->vendor_elems.data && iftd->vendor_elems.len) 1382 skb_put_data(skb, iftd->vendor_elems.data, iftd->vendor_elems.len); 1383 1384 return offset; 1385 } 1386 1387 static void ieee80211_add_non_inheritance_elem(struct sk_buff *skb, 1388 const u16 *outer, 1389 const u16 *inner) 1390 { 1391 unsigned int skb_len = skb->len; 1392 bool at_extension = false; 1393 bool added = false; 1394 int i, j; 1395 u8 *len, *list_len = NULL; 1396 1397 skb_put_u8(skb, WLAN_EID_EXTENSION); 1398 len = skb_put(skb, 1); 1399 skb_put_u8(skb, WLAN_EID_EXT_NON_INHERITANCE); 1400 1401 for (i = 0; i < PRESENT_ELEMS_MAX && outer[i]; i++) { 1402 u16 elem = outer[i]; 1403 bool have_inner = false; 1404 1405 /* should at least be sorted in the sense of normal -> ext */ 1406 WARN_ON(at_extension && elem < PRESENT_ELEM_EXT_OFFS); 1407 1408 /* switch to extension list */ 1409 if (!at_extension && elem >= PRESENT_ELEM_EXT_OFFS) { 1410 at_extension = true; 1411 if (!list_len) 1412 skb_put_u8(skb, 0); 1413 list_len = NULL; 1414 } 1415 1416 for (j = 0; j < PRESENT_ELEMS_MAX && inner[j]; j++) { 1417 if (elem == inner[j]) { 1418 have_inner = true; 1419 break; 1420 } 1421 } 1422 1423 if (have_inner) 1424 continue; 1425 1426 if (!list_len) { 1427 list_len = skb_put(skb, 1); 1428 *list_len = 0; 1429 } 1430 *list_len += 1; 1431 skb_put_u8(skb, (u8)elem); 1432 added = true; 1433 } 1434 1435 /* if we added a list but no extension list, make a zero-len one */ 1436 if (added && (!at_extension || !list_len)) 1437 skb_put_u8(skb, 0); 1438 1439 /* if nothing added remove extension element completely */ 1440 if (!added) 1441 skb_trim(skb, skb_len); 1442 else 1443 *len = skb->len - skb_len - 2; 1444 } 1445 1446 static void ieee80211_assoc_add_ml_elem(struct ieee80211_sub_if_data *sdata, 1447 struct sk_buff *skb, u16 capab, 1448 const struct element *ext_capa, 1449 const u16 *outer_present_elems) 1450 { 1451 struct ieee80211_local *local = sdata->local; 1452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1453 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1454 struct ieee80211_multi_link_elem *ml_elem; 1455 struct ieee80211_mle_basic_common_info *common; 1456 const struct wiphy_iftype_ext_capab *ift_ext_capa; 1457 __le16 eml_capa = 0, mld_capa_ops = 0; 1458 unsigned int link_id; 1459 u8 *ml_elem_len; 1460 void *capab_pos; 1461 1462 if (!ieee80211_vif_is_mld(&sdata->vif)) 1463 return; 1464 1465 ift_ext_capa = cfg80211_get_iftype_ext_capa(local->hw.wiphy, 1466 ieee80211_vif_type_p2p(&sdata->vif)); 1467 if (ift_ext_capa) { 1468 eml_capa = cpu_to_le16(ift_ext_capa->eml_capabilities); 1469 mld_capa_ops = cpu_to_le16(ift_ext_capa->mld_capa_and_ops); 1470 } 1471 1472 skb_put_u8(skb, WLAN_EID_EXTENSION); 1473 ml_elem_len = skb_put(skb, 1); 1474 skb_put_u8(skb, WLAN_EID_EXT_EHT_MULTI_LINK); 1475 ml_elem = skb_put(skb, sizeof(*ml_elem)); 1476 ml_elem->control = 1477 cpu_to_le16(IEEE80211_ML_CONTROL_TYPE_BASIC | 1478 IEEE80211_MLC_BASIC_PRES_MLD_CAPA_OP); 1479 common = skb_put(skb, sizeof(*common)); 1480 common->len = sizeof(*common) + 1481 2; /* MLD capa/ops */ 1482 memcpy(common->mld_mac_addr, sdata->vif.addr, ETH_ALEN); 1483 1484 /* add EML_CAPA only if needed, see Draft P802.11be_D2.1, 35.3.17 */ 1485 if (eml_capa & 1486 cpu_to_le16((IEEE80211_EML_CAP_EMLSR_SUPP | 1487 IEEE80211_EML_CAP_EMLMR_SUPPORT))) { 1488 common->len += 2; /* EML capabilities */ 1489 ml_elem->control |= 1490 cpu_to_le16(IEEE80211_MLC_BASIC_PRES_EML_CAPA); 1491 skb_put_data(skb, &eml_capa, sizeof(eml_capa)); 1492 } 1493 skb_put_data(skb, &mld_capa_ops, sizeof(mld_capa_ops)); 1494 1495 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1496 u16 link_present_elems[PRESENT_ELEMS_MAX] = {}; 1497 const u8 *extra_elems; 1498 size_t extra_elems_len; 1499 size_t extra_used; 1500 u8 *subelem_len = NULL; 1501 __le16 ctrl; 1502 1503 if (!assoc_data->link[link_id].bss || 1504 link_id == assoc_data->assoc_link_id) 1505 continue; 1506 1507 extra_elems = assoc_data->link[link_id].elems; 1508 extra_elems_len = assoc_data->link[link_id].elems_len; 1509 1510 skb_put_u8(skb, IEEE80211_MLE_SUBELEM_PER_STA_PROFILE); 1511 subelem_len = skb_put(skb, 1); 1512 1513 ctrl = cpu_to_le16(link_id | 1514 IEEE80211_MLE_STA_CONTROL_COMPLETE_PROFILE | 1515 IEEE80211_MLE_STA_CONTROL_STA_MAC_ADDR_PRESENT); 1516 skb_put_data(skb, &ctrl, sizeof(ctrl)); 1517 skb_put_u8(skb, 1 + ETH_ALEN); /* STA Info Length */ 1518 skb_put_data(skb, assoc_data->link[link_id].addr, 1519 ETH_ALEN); 1520 /* 1521 * Now add the contents of the (re)association request, 1522 * but the "listen interval" and "current AP address" 1523 * (if applicable) are skipped. So we only have 1524 * the capability field (remember the position and fill 1525 * later), followed by the elements added below by 1526 * calling ieee80211_assoc_link_elems(). 1527 */ 1528 capab_pos = skb_put(skb, 2); 1529 1530 extra_used = ieee80211_assoc_link_elems(sdata, skb, &capab, 1531 ext_capa, 1532 extra_elems, 1533 extra_elems_len, 1534 link_id, NULL, 1535 link_present_elems); 1536 if (extra_elems) 1537 skb_put_data(skb, extra_elems + extra_used, 1538 extra_elems_len - extra_used); 1539 1540 put_unaligned_le16(capab, capab_pos); 1541 1542 ieee80211_add_non_inheritance_elem(skb, outer_present_elems, 1543 link_present_elems); 1544 1545 ieee80211_fragment_element(skb, subelem_len, 1546 IEEE80211_MLE_SUBELEM_FRAGMENT); 1547 } 1548 1549 ieee80211_fragment_element(skb, ml_elem_len, WLAN_EID_FRAGMENT); 1550 } 1551 1552 static int ieee80211_send_assoc(struct ieee80211_sub_if_data *sdata) 1553 { 1554 struct ieee80211_local *local = sdata->local; 1555 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1556 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 1557 struct ieee80211_link_data *link; 1558 struct sk_buff *skb; 1559 struct ieee80211_mgmt *mgmt; 1560 u8 *pos, qos_info, *ie_start; 1561 size_t offset, noffset; 1562 u16 capab = 0, link_capab; 1563 __le16 listen_int; 1564 struct element *ext_capa = NULL; 1565 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif); 1566 struct ieee80211_prep_tx_info info = {}; 1567 unsigned int link_id, n_links = 0; 1568 u16 present_elems[PRESENT_ELEMS_MAX] = {}; 1569 void *capab_pos; 1570 size_t size; 1571 int ret; 1572 1573 /* we know it's writable, cast away the const */ 1574 if (assoc_data->ie_len) 1575 ext_capa = (void *)cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 1576 assoc_data->ie, 1577 assoc_data->ie_len); 1578 1579 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1580 1581 size = local->hw.extra_tx_headroom + 1582 sizeof(*mgmt) + /* bit too much but doesn't matter */ 1583 2 + assoc_data->ssid_len + /* SSID */ 1584 assoc_data->ie_len + /* extra IEs */ 1585 (assoc_data->fils_kek_len ? 16 /* AES-SIV */ : 0) + 1586 9; /* WMM */ 1587 1588 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 1589 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 1590 const struct ieee80211_sband_iftype_data *iftd; 1591 struct ieee80211_supported_band *sband; 1592 1593 if (!cbss) 1594 continue; 1595 1596 sband = local->hw.wiphy->bands[cbss->channel->band]; 1597 1598 n_links++; 1599 /* add STA profile elements length */ 1600 size += assoc_data->link[link_id].elems_len; 1601 /* and supported rates length */ 1602 size += 4 + sband->n_bitrates; 1603 /* supported channels */ 1604 size += 2 + 2 * sband->n_channels; 1605 1606 iftd = ieee80211_get_sband_iftype_data(sband, iftype); 1607 if (iftd) 1608 size += iftd->vendor_elems.len; 1609 1610 /* power capability */ 1611 size += 4; 1612 1613 /* HT, VHT, HE, EHT */ 1614 size += 2 + sizeof(struct ieee80211_ht_cap); 1615 size += 2 + sizeof(struct ieee80211_vht_cap); 1616 size += 2 + 1 + sizeof(struct ieee80211_he_cap_elem) + 1617 sizeof(struct ieee80211_he_mcs_nss_supp) + 1618 IEEE80211_HE_PPE_THRES_MAX_LEN; 1619 1620 if (sband->band == NL80211_BAND_6GHZ) 1621 size += 2 + 1 + sizeof(struct ieee80211_he_6ghz_capa); 1622 1623 size += 2 + 1 + sizeof(struct ieee80211_eht_cap_elem) + 1624 sizeof(struct ieee80211_eht_mcs_nss_supp) + 1625 IEEE80211_EHT_PPE_THRES_MAX_LEN; 1626 1627 /* non-inheritance element */ 1628 size += 2 + 2 + PRESENT_ELEMS_MAX; 1629 1630 /* should be the same across all BSSes */ 1631 if (cbss->capability & WLAN_CAPABILITY_PRIVACY) 1632 capab |= WLAN_CAPABILITY_PRIVACY; 1633 } 1634 1635 if (ieee80211_vif_is_mld(&sdata->vif)) { 1636 /* consider the multi-link element with STA profile */ 1637 size += sizeof(struct ieee80211_multi_link_elem); 1638 /* max common info field in basic multi-link element */ 1639 size += sizeof(struct ieee80211_mle_basic_common_info) + 1640 2 + /* capa & op */ 1641 2; /* EML capa */ 1642 1643 /* 1644 * The capability elements were already considered above; 1645 * note this over-estimates a bit because there's no 1646 * STA profile for the assoc link. 1647 */ 1648 size += (n_links - 1) * 1649 (1 + 1 + /* subelement ID/length */ 1650 2 + /* STA control */ 1651 1 + ETH_ALEN + 2 /* STA Info field */); 1652 } 1653 1654 link = sdata_dereference(sdata->link[assoc_data->assoc_link_id], sdata); 1655 if (WARN_ON(!link)) 1656 return -EINVAL; 1657 1658 if (WARN_ON(!assoc_data->link[assoc_data->assoc_link_id].bss)) 1659 return -EINVAL; 1660 1661 skb = alloc_skb(size, GFP_KERNEL); 1662 if (!skb) 1663 return -ENOMEM; 1664 1665 skb_reserve(skb, local->hw.extra_tx_headroom); 1666 1667 if (ifmgd->flags & IEEE80211_STA_ENABLE_RRM) 1668 capab |= WLAN_CAPABILITY_RADIO_MEASURE; 1669 1670 /* Set MBSSID support for HE AP if needed */ 1671 if (ieee80211_hw_check(&local->hw, SUPPORTS_ONLY_HE_MULTI_BSSID) && 1672 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 1673 ext_capa && ext_capa->datalen >= 3) 1674 ext_capa->data[2] |= WLAN_EXT_CAPA3_MULTI_BSSID_SUPPORT; 1675 1676 mgmt = skb_put_zero(skb, 24); 1677 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 1678 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 1679 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 1680 1681 listen_int = cpu_to_le16(assoc_data->s1g ? 1682 ieee80211_encode_usf(local->hw.conf.listen_interval) : 1683 local->hw.conf.listen_interval); 1684 if (!is_zero_ether_addr(assoc_data->prev_ap_addr)) { 1685 skb_put(skb, 10); 1686 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1687 IEEE80211_STYPE_REASSOC_REQ); 1688 capab_pos = &mgmt->u.reassoc_req.capab_info; 1689 mgmt->u.reassoc_req.listen_interval = listen_int; 1690 memcpy(mgmt->u.reassoc_req.current_ap, 1691 assoc_data->prev_ap_addr, ETH_ALEN); 1692 info.subtype = IEEE80211_STYPE_REASSOC_REQ; 1693 } else { 1694 skb_put(skb, 4); 1695 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 1696 IEEE80211_STYPE_ASSOC_REQ); 1697 capab_pos = &mgmt->u.assoc_req.capab_info; 1698 mgmt->u.assoc_req.listen_interval = listen_int; 1699 info.subtype = IEEE80211_STYPE_ASSOC_REQ; 1700 } 1701 1702 /* SSID */ 1703 pos = skb_put(skb, 2 + assoc_data->ssid_len); 1704 ie_start = pos; 1705 *pos++ = WLAN_EID_SSID; 1706 *pos++ = assoc_data->ssid_len; 1707 memcpy(pos, assoc_data->ssid, assoc_data->ssid_len); 1708 1709 /* 1710 * This bit is technically reserved, so it shouldn't matter for either 1711 * the AP or us, but it also means we shouldn't set it. However, we've 1712 * always set it in the past, and apparently some EHT APs check that 1713 * we don't set it. To avoid interoperability issues with old APs that 1714 * for some reason check it and want it to be set, set the bit for all 1715 * pre-EHT connections as we used to do. 1716 */ 1717 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_EHT) 1718 capab |= WLAN_CAPABILITY_ESS; 1719 1720 /* add the elements for the assoc (main) link */ 1721 link_capab = capab; 1722 offset = ieee80211_assoc_link_elems(sdata, skb, &link_capab, 1723 ext_capa, 1724 assoc_data->ie, 1725 assoc_data->ie_len, 1726 assoc_data->assoc_link_id, link, 1727 present_elems); 1728 put_unaligned_le16(link_capab, capab_pos); 1729 1730 /* if present, add any custom non-vendor IEs */ 1731 if (assoc_data->ie_len) { 1732 noffset = ieee80211_ie_split_vendor(assoc_data->ie, 1733 assoc_data->ie_len, 1734 offset); 1735 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1736 offset = noffset; 1737 } 1738 1739 if (assoc_data->wmm) { 1740 if (assoc_data->uapsd) { 1741 qos_info = ifmgd->uapsd_queues; 1742 qos_info |= (ifmgd->uapsd_max_sp_len << 1743 IEEE80211_WMM_IE_STA_QOSINFO_SP_SHIFT); 1744 } else { 1745 qos_info = 0; 1746 } 1747 1748 pos = ieee80211_add_wmm_info_ie(skb_put(skb, 9), qos_info); 1749 } 1750 1751 /* add any remaining custom (i.e. vendor specific here) IEs */ 1752 if (assoc_data->ie_len) { 1753 noffset = assoc_data->ie_len; 1754 skb_put_data(skb, assoc_data->ie + offset, noffset - offset); 1755 } 1756 1757 if (assoc_data->fils_kek_len) { 1758 ret = fils_encrypt_assoc_req(skb, assoc_data); 1759 if (ret < 0) { 1760 dev_kfree_skb(skb); 1761 return ret; 1762 } 1763 } 1764 1765 pos = skb_tail_pointer(skb); 1766 kfree(ifmgd->assoc_req_ies); 1767 ifmgd->assoc_req_ies = kmemdup(ie_start, pos - ie_start, GFP_ATOMIC); 1768 if (!ifmgd->assoc_req_ies) { 1769 dev_kfree_skb(skb); 1770 return -ENOMEM; 1771 } 1772 1773 ifmgd->assoc_req_ies_len = pos - ie_start; 1774 1775 info.link_id = assoc_data->assoc_link_id; 1776 drv_mgd_prepare_tx(local, sdata, &info); 1777 1778 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1779 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1780 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS | 1781 IEEE80211_TX_INTFL_MLME_CONN_TX; 1782 ieee80211_tx_skb(sdata, skb); 1783 1784 return 0; 1785 } 1786 1787 void ieee80211_send_pspoll(struct ieee80211_local *local, 1788 struct ieee80211_sub_if_data *sdata) 1789 { 1790 struct ieee80211_pspoll *pspoll; 1791 struct sk_buff *skb; 1792 1793 skb = ieee80211_pspoll_get(&local->hw, &sdata->vif); 1794 if (!skb) 1795 return; 1796 1797 pspoll = (struct ieee80211_pspoll *) skb->data; 1798 pspoll->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1799 1800 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1801 ieee80211_tx_skb(sdata, skb); 1802 } 1803 1804 void ieee80211_send_nullfunc(struct ieee80211_local *local, 1805 struct ieee80211_sub_if_data *sdata, 1806 bool powersave) 1807 { 1808 struct sk_buff *skb; 1809 struct ieee80211_hdr_3addr *nullfunc; 1810 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1811 1812 skb = ieee80211_nullfunc_get(&local->hw, &sdata->vif, -1, 1813 !ieee80211_hw_check(&local->hw, 1814 DOESNT_SUPPORT_QOS_NDP)); 1815 if (!skb) 1816 return; 1817 1818 nullfunc = (struct ieee80211_hdr_3addr *) skb->data; 1819 if (powersave) 1820 nullfunc->frame_control |= cpu_to_le16(IEEE80211_FCTL_PM); 1821 1822 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT | 1823 IEEE80211_TX_INTFL_OFFCHAN_TX_OK; 1824 1825 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 1826 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 1827 1828 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 1829 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1830 1831 ieee80211_tx_skb(sdata, skb); 1832 } 1833 1834 void ieee80211_send_4addr_nullfunc(struct ieee80211_local *local, 1835 struct ieee80211_sub_if_data *sdata) 1836 { 1837 struct sk_buff *skb; 1838 struct ieee80211_hdr *nullfunc; 1839 __le16 fc; 1840 1841 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 1842 return; 1843 1844 skb = dev_alloc_skb(local->hw.extra_tx_headroom + 30); 1845 if (!skb) 1846 return; 1847 1848 skb_reserve(skb, local->hw.extra_tx_headroom); 1849 1850 nullfunc = skb_put_zero(skb, 30); 1851 fc = cpu_to_le16(IEEE80211_FTYPE_DATA | IEEE80211_STYPE_NULLFUNC | 1852 IEEE80211_FCTL_FROMDS | IEEE80211_FCTL_TODS); 1853 nullfunc->frame_control = fc; 1854 memcpy(nullfunc->addr1, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1855 memcpy(nullfunc->addr2, sdata->vif.addr, ETH_ALEN); 1856 memcpy(nullfunc->addr3, sdata->deflink.u.mgd.bssid, ETH_ALEN); 1857 memcpy(nullfunc->addr4, sdata->vif.addr, ETH_ALEN); 1858 1859 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT; 1860 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_CTL_USE_MINRATE; 1861 ieee80211_tx_skb(sdata, skb); 1862 } 1863 1864 /* spectrum management related things */ 1865 static void ieee80211_chswitch_work(struct wiphy *wiphy, 1866 struct wiphy_work *work) 1867 { 1868 struct ieee80211_link_data *link = 1869 container_of(work, struct ieee80211_link_data, 1870 u.mgd.chswitch_work.work); 1871 struct ieee80211_sub_if_data *sdata = link->sdata; 1872 struct ieee80211_local *local = sdata->local; 1873 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1874 int ret; 1875 1876 if (!ieee80211_sdata_running(sdata)) 1877 return; 1878 1879 lockdep_assert_wiphy(local->hw.wiphy); 1880 1881 if (!ifmgd->associated) 1882 return; 1883 1884 if (!link->conf->csa_active) 1885 return; 1886 1887 /* 1888 * using reservation isn't immediate as it may be deferred until later 1889 * with multi-vif. once reservation is complete it will re-schedule the 1890 * work with no reserved_chanctx so verify chandef to check if it 1891 * completed successfully 1892 */ 1893 1894 if (link->reserved_chanctx) { 1895 /* 1896 * with multi-vif csa driver may call ieee80211_csa_finish() 1897 * many times while waiting for other interfaces to use their 1898 * reservations 1899 */ 1900 if (link->reserved_ready) 1901 return; 1902 1903 ret = ieee80211_link_use_reserved_context(link); 1904 if (ret) { 1905 sdata_info(sdata, 1906 "failed to use reserved channel context, disconnecting (err=%d)\n", 1907 ret); 1908 wiphy_work_queue(sdata->local->hw.wiphy, 1909 &ifmgd->csa_connection_drop_work); 1910 } 1911 return; 1912 } 1913 1914 if (!ieee80211_chanreq_identical(&link->conf->chanreq, 1915 &link->csa_chanreq)) { 1916 sdata_info(sdata, 1917 "failed to finalize channel switch, disconnecting\n"); 1918 wiphy_work_queue(sdata->local->hw.wiphy, 1919 &ifmgd->csa_connection_drop_work); 1920 return; 1921 } 1922 1923 link->u.mgd.csa_waiting_bcn = true; 1924 1925 ieee80211_sta_reset_beacon_monitor(sdata); 1926 ieee80211_sta_reset_conn_monitor(sdata); 1927 } 1928 1929 static void ieee80211_chswitch_post_beacon(struct ieee80211_link_data *link) 1930 { 1931 struct ieee80211_sub_if_data *sdata = link->sdata; 1932 struct ieee80211_local *local = sdata->local; 1933 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 1934 int ret; 1935 1936 lockdep_assert_wiphy(sdata->local->hw.wiphy); 1937 1938 WARN_ON(!link->conf->csa_active); 1939 1940 if (sdata->csa_blocked_queues) { 1941 ieee80211_wake_vif_queues(local, sdata, 1942 IEEE80211_QUEUE_STOP_REASON_CSA); 1943 sdata->csa_blocked_queues = false; 1944 } 1945 1946 link->conf->csa_active = false; 1947 link->u.mgd.csa_blocked_tx = false; 1948 link->u.mgd.csa_waiting_bcn = false; 1949 1950 ret = drv_post_channel_switch(link); 1951 if (ret) { 1952 sdata_info(sdata, 1953 "driver post channel switch failed, disconnecting\n"); 1954 wiphy_work_queue(sdata->local->hw.wiphy, 1955 &ifmgd->csa_connection_drop_work); 1956 return; 1957 } 1958 1959 cfg80211_ch_switch_notify(sdata->dev, &link->reserved.oper, 1960 link->link_id); 1961 } 1962 1963 void ieee80211_chswitch_done(struct ieee80211_vif *vif, bool success, 1964 unsigned int link_id) 1965 { 1966 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 1967 1968 trace_api_chswitch_done(sdata, success, link_id); 1969 1970 rcu_read_lock(); 1971 1972 if (!success) { 1973 sdata_info(sdata, 1974 "driver channel switch failed, disconnecting\n"); 1975 wiphy_work_queue(sdata->local->hw.wiphy, 1976 &sdata->u.mgd.csa_connection_drop_work); 1977 } else { 1978 struct ieee80211_link_data *link = 1979 rcu_dereference(sdata->link[link_id]); 1980 1981 if (WARN_ON(!link)) { 1982 rcu_read_unlock(); 1983 return; 1984 } 1985 1986 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 1987 &link->u.mgd.chswitch_work, 0); 1988 } 1989 1990 rcu_read_unlock(); 1991 } 1992 EXPORT_SYMBOL(ieee80211_chswitch_done); 1993 1994 static void 1995 ieee80211_sta_abort_chanswitch(struct ieee80211_link_data *link) 1996 { 1997 struct ieee80211_sub_if_data *sdata = link->sdata; 1998 struct ieee80211_local *local = sdata->local; 1999 2000 lockdep_assert_wiphy(local->hw.wiphy); 2001 2002 if (!local->ops->abort_channel_switch) 2003 return; 2004 2005 ieee80211_link_unreserve_chanctx(link); 2006 2007 if (sdata->csa_blocked_queues) { 2008 ieee80211_wake_vif_queues(local, sdata, 2009 IEEE80211_QUEUE_STOP_REASON_CSA); 2010 sdata->csa_blocked_queues = false; 2011 } 2012 2013 link->conf->csa_active = false; 2014 link->u.mgd.csa_blocked_tx = false; 2015 2016 drv_abort_channel_switch(link); 2017 } 2018 2019 static void 2020 ieee80211_sta_process_chanswitch(struct ieee80211_link_data *link, 2021 u64 timestamp, u32 device_timestamp, 2022 struct ieee802_11_elems *elems, 2023 bool beacon) 2024 { 2025 struct ieee80211_sub_if_data *sdata = link->sdata; 2026 struct ieee80211_local *local = sdata->local; 2027 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2028 struct cfg80211_bss *cbss = link->conf->bss; 2029 struct ieee80211_chanctx_conf *conf; 2030 struct ieee80211_chanctx *chanctx; 2031 enum nl80211_band current_band; 2032 struct ieee80211_csa_ie csa_ie; 2033 struct ieee80211_channel_switch ch_switch = { 2034 .link_id = link->link_id, 2035 }; 2036 struct ieee80211_bss *bss; 2037 unsigned long timeout; 2038 int res; 2039 2040 lockdep_assert_wiphy(local->hw.wiphy); 2041 2042 if (!cbss) 2043 return; 2044 2045 current_band = cbss->channel->band; 2046 bss = (void *)cbss->priv; 2047 res = ieee80211_parse_ch_switch_ie(sdata, elems, current_band, 2048 bss->vht_cap_info, 2049 &link->u.mgd.conn, 2050 link->u.mgd.bssid, &csa_ie); 2051 2052 if (!res) { 2053 ch_switch.timestamp = timestamp; 2054 ch_switch.device_timestamp = device_timestamp; 2055 ch_switch.block_tx = csa_ie.mode; 2056 ch_switch.chandef = csa_ie.chanreq.oper; 2057 ch_switch.count = csa_ie.count; 2058 ch_switch.delay = csa_ie.max_switch_time; 2059 } 2060 2061 if (res < 0) 2062 goto drop_connection; 2063 2064 if (link->conf->csa_active) { 2065 /* already processing - disregard action frames */ 2066 if (!beacon) 2067 return; 2068 2069 if (link->u.mgd.csa_waiting_bcn) { 2070 ieee80211_chswitch_post_beacon(link); 2071 /* 2072 * If the CSA IE is still present in the beacon after 2073 * the switch, we need to consider it as a new CSA 2074 * (possibly to self) - this happens by not returning 2075 * here so we'll get to the check below. 2076 */ 2077 } else if (res) { 2078 ieee80211_sta_abort_chanswitch(link); 2079 return; 2080 } else { 2081 drv_channel_switch_rx_beacon(sdata, &ch_switch); 2082 return; 2083 } 2084 } 2085 2086 /* nothing to do at all - no active CSA nor a new one */ 2087 if (res) 2088 return; 2089 2090 if (link->conf->chanreq.oper.chan->band != 2091 csa_ie.chanreq.oper.chan->band) { 2092 sdata_info(sdata, 2093 "AP %pM switches to different band (%d MHz, width:%d, CF1/2: %d/%d MHz), disconnecting\n", 2094 link->u.mgd.bssid, 2095 csa_ie.chanreq.oper.chan->center_freq, 2096 csa_ie.chanreq.oper.width, 2097 csa_ie.chanreq.oper.center_freq1, 2098 csa_ie.chanreq.oper.center_freq2); 2099 goto drop_connection; 2100 } 2101 2102 if (!cfg80211_chandef_usable(local->hw.wiphy, &csa_ie.chanreq.oper, 2103 IEEE80211_CHAN_DISABLED)) { 2104 sdata_info(sdata, 2105 "AP %pM switches to unsupported channel " 2106 "(%d.%03d MHz, width:%d, CF1/2: %d.%03d/%d MHz), " 2107 "disconnecting\n", 2108 link->u.mgd.bssid, 2109 csa_ie.chanreq.oper.chan->center_freq, 2110 csa_ie.chanreq.oper.chan->freq_offset, 2111 csa_ie.chanreq.oper.width, 2112 csa_ie.chanreq.oper.center_freq1, 2113 csa_ie.chanreq.oper.freq1_offset, 2114 csa_ie.chanreq.oper.center_freq2); 2115 goto drop_connection; 2116 } 2117 2118 if (cfg80211_chandef_identical(&csa_ie.chanreq.oper, 2119 &link->conf->chanreq.oper) && 2120 (!csa_ie.mode || !beacon)) { 2121 if (link->u.mgd.csa_ignored_same_chan) 2122 return; 2123 sdata_info(sdata, 2124 "AP %pM tries to chanswitch to same channel, ignore\n", 2125 link->u.mgd.bssid); 2126 link->u.mgd.csa_ignored_same_chan = true; 2127 return; 2128 } 2129 2130 /* 2131 * Drop all TDLS peers on the affected link - either we disconnect or 2132 * move to a different channel from this point on. There's no telling 2133 * what our peer will do. 2134 * The TDLS WIDER_BW scenario is also problematic, as peers might now 2135 * have an incompatible wider chandef. 2136 */ 2137 ieee80211_teardown_tdls_peers(link); 2138 2139 conf = rcu_dereference_protected(link->conf->chanctx_conf, 2140 lockdep_is_held(&local->hw.wiphy->mtx)); 2141 if (!conf) { 2142 sdata_info(sdata, 2143 "no channel context assigned to vif?, disconnecting\n"); 2144 goto drop_connection; 2145 } 2146 2147 chanctx = container_of(conf, struct ieee80211_chanctx, conf); 2148 2149 if (!ieee80211_hw_check(&local->hw, CHANCTX_STA_CSA)) { 2150 sdata_info(sdata, 2151 "driver doesn't support chan-switch with channel contexts\n"); 2152 goto drop_connection; 2153 } 2154 2155 if (drv_pre_channel_switch(sdata, &ch_switch)) { 2156 sdata_info(sdata, 2157 "preparing for channel switch failed, disconnecting\n"); 2158 goto drop_connection; 2159 } 2160 2161 res = ieee80211_link_reserve_chanctx(link, &csa_ie.chanreq, 2162 chanctx->mode, false); 2163 if (res) { 2164 sdata_info(sdata, 2165 "failed to reserve channel context for channel switch, disconnecting (err=%d)\n", 2166 res); 2167 goto drop_connection; 2168 } 2169 2170 link->conf->csa_active = true; 2171 link->csa_chanreq = csa_ie.chanreq; 2172 link->u.mgd.csa_ignored_same_chan = false; 2173 link->u.mgd.beacon_crc_valid = false; 2174 link->u.mgd.csa_blocked_tx = csa_ie.mode; 2175 2176 if (csa_ie.mode && 2177 !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA)) { 2178 ieee80211_stop_vif_queues(local, sdata, 2179 IEEE80211_QUEUE_STOP_REASON_CSA); 2180 sdata->csa_blocked_queues = true; 2181 } 2182 2183 cfg80211_ch_switch_started_notify(sdata->dev, &csa_ie.chanreq.oper, 2184 link->link_id, csa_ie.count, 2185 csa_ie.mode); 2186 2187 if (local->ops->channel_switch) { 2188 /* use driver's channel switch callback */ 2189 drv_channel_switch(local, sdata, &ch_switch); 2190 return; 2191 } 2192 2193 /* channel switch handled in software */ 2194 timeout = TU_TO_JIFFIES((max_t(int, csa_ie.count, 1) - 1) * 2195 cbss->beacon_interval); 2196 wiphy_delayed_work_queue(local->hw.wiphy, 2197 &link->u.mgd.chswitch_work, 2198 timeout); 2199 return; 2200 drop_connection: 2201 /* 2202 * This is just so that the disconnect flow will know that 2203 * we were trying to switch channel and failed. In case the 2204 * mode is 1 (we are not allowed to Tx), we will know not to 2205 * send a deauthentication frame. Those two fields will be 2206 * reset when the disconnection worker runs. 2207 */ 2208 link->conf->csa_active = true; 2209 link->u.mgd.csa_blocked_tx = csa_ie.mode; 2210 sdata->csa_blocked_queues = 2211 csa_ie.mode && !ieee80211_hw_check(&local->hw, HANDLES_QUIET_CSA); 2212 2213 wiphy_work_queue(sdata->local->hw.wiphy, 2214 &ifmgd->csa_connection_drop_work); 2215 } 2216 2217 static bool 2218 ieee80211_find_80211h_pwr_constr(struct ieee80211_sub_if_data *sdata, 2219 struct ieee80211_channel *channel, 2220 const u8 *country_ie, u8 country_ie_len, 2221 const u8 *pwr_constr_elem, 2222 int *chan_pwr, int *pwr_reduction) 2223 { 2224 struct ieee80211_country_ie_triplet *triplet; 2225 int chan = ieee80211_frequency_to_channel(channel->center_freq); 2226 int i, chan_increment; 2227 bool have_chan_pwr = false; 2228 2229 /* Invalid IE */ 2230 if (country_ie_len % 2 || country_ie_len < IEEE80211_COUNTRY_IE_MIN_LEN) 2231 return false; 2232 2233 triplet = (void *)(country_ie + 3); 2234 country_ie_len -= 3; 2235 2236 switch (channel->band) { 2237 default: 2238 WARN_ON_ONCE(1); 2239 fallthrough; 2240 case NL80211_BAND_2GHZ: 2241 case NL80211_BAND_60GHZ: 2242 case NL80211_BAND_LC: 2243 chan_increment = 1; 2244 break; 2245 case NL80211_BAND_5GHZ: 2246 chan_increment = 4; 2247 break; 2248 case NL80211_BAND_6GHZ: 2249 /* 2250 * In the 6 GHz band, the "maximum transmit power level" 2251 * field in the triplets is reserved, and thus will be 2252 * zero and we shouldn't use it to control TX power. 2253 * The actual TX power will be given in the transmit 2254 * power envelope element instead. 2255 */ 2256 return false; 2257 } 2258 2259 /* find channel */ 2260 while (country_ie_len >= 3) { 2261 u8 first_channel = triplet->chans.first_channel; 2262 2263 if (first_channel >= IEEE80211_COUNTRY_EXTENSION_ID) 2264 goto next; 2265 2266 for (i = 0; i < triplet->chans.num_channels; i++) { 2267 if (first_channel + i * chan_increment == chan) { 2268 have_chan_pwr = true; 2269 *chan_pwr = triplet->chans.max_power; 2270 break; 2271 } 2272 } 2273 if (have_chan_pwr) 2274 break; 2275 2276 next: 2277 triplet++; 2278 country_ie_len -= 3; 2279 } 2280 2281 if (have_chan_pwr && pwr_constr_elem) 2282 *pwr_reduction = *pwr_constr_elem; 2283 else 2284 *pwr_reduction = 0; 2285 2286 return have_chan_pwr; 2287 } 2288 2289 static void ieee80211_find_cisco_dtpc(struct ieee80211_sub_if_data *sdata, 2290 struct ieee80211_channel *channel, 2291 const u8 *cisco_dtpc_ie, 2292 int *pwr_level) 2293 { 2294 /* From practical testing, the first data byte of the DTPC element 2295 * seems to contain the requested dBm level, and the CLI on Cisco 2296 * APs clearly state the range is -127 to 127 dBm, which indicates 2297 * a signed byte, although it seemingly never actually goes negative. 2298 * The other byte seems to always be zero. 2299 */ 2300 *pwr_level = (__s8)cisco_dtpc_ie[4]; 2301 } 2302 2303 static u64 ieee80211_handle_pwr_constr(struct ieee80211_link_data *link, 2304 struct ieee80211_channel *channel, 2305 struct ieee80211_mgmt *mgmt, 2306 const u8 *country_ie, u8 country_ie_len, 2307 const u8 *pwr_constr_ie, 2308 const u8 *cisco_dtpc_ie) 2309 { 2310 struct ieee80211_sub_if_data *sdata = link->sdata; 2311 bool has_80211h_pwr = false, has_cisco_pwr = false; 2312 int chan_pwr = 0, pwr_reduction_80211h = 0; 2313 int pwr_level_cisco, pwr_level_80211h; 2314 int new_ap_level; 2315 __le16 capab = mgmt->u.probe_resp.capab_info; 2316 2317 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) 2318 return 0; /* TODO */ 2319 2320 if (country_ie && 2321 (capab & cpu_to_le16(WLAN_CAPABILITY_SPECTRUM_MGMT) || 2322 capab & cpu_to_le16(WLAN_CAPABILITY_RADIO_MEASURE))) { 2323 has_80211h_pwr = ieee80211_find_80211h_pwr_constr( 2324 sdata, channel, country_ie, country_ie_len, 2325 pwr_constr_ie, &chan_pwr, &pwr_reduction_80211h); 2326 pwr_level_80211h = 2327 max_t(int, 0, chan_pwr - pwr_reduction_80211h); 2328 } 2329 2330 if (cisco_dtpc_ie) { 2331 ieee80211_find_cisco_dtpc( 2332 sdata, channel, cisco_dtpc_ie, &pwr_level_cisco); 2333 has_cisco_pwr = true; 2334 } 2335 2336 if (!has_80211h_pwr && !has_cisco_pwr) 2337 return 0; 2338 2339 /* If we have both 802.11h and Cisco DTPC, apply both limits 2340 * by picking the smallest of the two power levels advertised. 2341 */ 2342 if (has_80211h_pwr && 2343 (!has_cisco_pwr || pwr_level_80211h <= pwr_level_cisco)) { 2344 new_ap_level = pwr_level_80211h; 2345 2346 if (link->ap_power_level == new_ap_level) 2347 return 0; 2348 2349 sdata_dbg(sdata, 2350 "Limiting TX power to %d (%d - %d) dBm as advertised by %pM\n", 2351 pwr_level_80211h, chan_pwr, pwr_reduction_80211h, 2352 link->u.mgd.bssid); 2353 } else { /* has_cisco_pwr is always true here. */ 2354 new_ap_level = pwr_level_cisco; 2355 2356 if (link->ap_power_level == new_ap_level) 2357 return 0; 2358 2359 sdata_dbg(sdata, 2360 "Limiting TX power to %d dBm as advertised by %pM\n", 2361 pwr_level_cisco, link->u.mgd.bssid); 2362 } 2363 2364 link->ap_power_level = new_ap_level; 2365 if (__ieee80211_recalc_txpower(sdata)) 2366 return BSS_CHANGED_TXPOWER; 2367 return 0; 2368 } 2369 2370 /* powersave */ 2371 static void ieee80211_enable_ps(struct ieee80211_local *local, 2372 struct ieee80211_sub_if_data *sdata) 2373 { 2374 struct ieee80211_conf *conf = &local->hw.conf; 2375 2376 /* 2377 * If we are scanning right now then the parameters will 2378 * take effect when scan finishes. 2379 */ 2380 if (local->scanning) 2381 return; 2382 2383 if (conf->dynamic_ps_timeout > 0 && 2384 !ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2385 mod_timer(&local->dynamic_ps_timer, jiffies + 2386 msecs_to_jiffies(conf->dynamic_ps_timeout)); 2387 } else { 2388 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) 2389 ieee80211_send_nullfunc(local, sdata, true); 2390 2391 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2392 ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 2393 return; 2394 2395 conf->flags |= IEEE80211_CONF_PS; 2396 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2397 } 2398 } 2399 2400 static void ieee80211_change_ps(struct ieee80211_local *local) 2401 { 2402 struct ieee80211_conf *conf = &local->hw.conf; 2403 2404 if (local->ps_sdata) { 2405 ieee80211_enable_ps(local, local->ps_sdata); 2406 } else if (conf->flags & IEEE80211_CONF_PS) { 2407 conf->flags &= ~IEEE80211_CONF_PS; 2408 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2409 del_timer_sync(&local->dynamic_ps_timer); 2410 wiphy_work_cancel(local->hw.wiphy, 2411 &local->dynamic_ps_enable_work); 2412 } 2413 } 2414 2415 static bool ieee80211_powersave_allowed(struct ieee80211_sub_if_data *sdata) 2416 { 2417 struct ieee80211_local *local = sdata->local; 2418 struct ieee80211_if_managed *mgd = &sdata->u.mgd; 2419 struct sta_info *sta = NULL; 2420 bool authorized = false; 2421 2422 if (!mgd->powersave) 2423 return false; 2424 2425 if (mgd->broken_ap) 2426 return false; 2427 2428 if (!mgd->associated) 2429 return false; 2430 2431 if (mgd->flags & IEEE80211_STA_CONNECTION_POLL) 2432 return false; 2433 2434 if (!(local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_MLO) && 2435 !sdata->deflink.u.mgd.have_beacon) 2436 return false; 2437 2438 rcu_read_lock(); 2439 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 2440 if (sta) 2441 authorized = test_sta_flag(sta, WLAN_STA_AUTHORIZED); 2442 rcu_read_unlock(); 2443 2444 return authorized; 2445 } 2446 2447 /* need to hold RTNL or interface lock */ 2448 void ieee80211_recalc_ps(struct ieee80211_local *local) 2449 { 2450 struct ieee80211_sub_if_data *sdata, *found = NULL; 2451 int count = 0; 2452 int timeout; 2453 2454 if (!ieee80211_hw_check(&local->hw, SUPPORTS_PS) || 2455 ieee80211_hw_check(&local->hw, SUPPORTS_DYNAMIC_PS)) { 2456 local->ps_sdata = NULL; 2457 return; 2458 } 2459 2460 list_for_each_entry(sdata, &local->interfaces, list) { 2461 if (!ieee80211_sdata_running(sdata)) 2462 continue; 2463 if (sdata->vif.type == NL80211_IFTYPE_AP) { 2464 /* If an AP vif is found, then disable PS 2465 * by setting the count to zero thereby setting 2466 * ps_sdata to NULL. 2467 */ 2468 count = 0; 2469 break; 2470 } 2471 if (sdata->vif.type != NL80211_IFTYPE_STATION) 2472 continue; 2473 found = sdata; 2474 count++; 2475 } 2476 2477 if (count == 1 && ieee80211_powersave_allowed(found)) { 2478 u8 dtimper = found->deflink.u.mgd.dtim_period; 2479 2480 timeout = local->dynamic_ps_forced_timeout; 2481 if (timeout < 0) 2482 timeout = 100; 2483 local->hw.conf.dynamic_ps_timeout = timeout; 2484 2485 /* If the TIM IE is invalid, pretend the value is 1 */ 2486 if (!dtimper) 2487 dtimper = 1; 2488 2489 local->hw.conf.ps_dtim_period = dtimper; 2490 local->ps_sdata = found; 2491 } else { 2492 local->ps_sdata = NULL; 2493 } 2494 2495 ieee80211_change_ps(local); 2496 } 2497 2498 void ieee80211_recalc_ps_vif(struct ieee80211_sub_if_data *sdata) 2499 { 2500 bool ps_allowed = ieee80211_powersave_allowed(sdata); 2501 2502 if (sdata->vif.cfg.ps != ps_allowed) { 2503 sdata->vif.cfg.ps = ps_allowed; 2504 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_PS); 2505 } 2506 } 2507 2508 void ieee80211_dynamic_ps_disable_work(struct wiphy *wiphy, 2509 struct wiphy_work *work) 2510 { 2511 struct ieee80211_local *local = 2512 container_of(work, struct ieee80211_local, 2513 dynamic_ps_disable_work); 2514 2515 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 2516 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 2517 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2518 } 2519 2520 ieee80211_wake_queues_by_reason(&local->hw, 2521 IEEE80211_MAX_QUEUE_MAP, 2522 IEEE80211_QUEUE_STOP_REASON_PS, 2523 false); 2524 } 2525 2526 void ieee80211_dynamic_ps_enable_work(struct wiphy *wiphy, 2527 struct wiphy_work *work) 2528 { 2529 struct ieee80211_local *local = 2530 container_of(work, struct ieee80211_local, 2531 dynamic_ps_enable_work); 2532 struct ieee80211_sub_if_data *sdata = local->ps_sdata; 2533 struct ieee80211_if_managed *ifmgd; 2534 unsigned long flags; 2535 int q; 2536 2537 /* can only happen when PS was just disabled anyway */ 2538 if (!sdata) 2539 return; 2540 2541 ifmgd = &sdata->u.mgd; 2542 2543 if (local->hw.conf.flags & IEEE80211_CONF_PS) 2544 return; 2545 2546 if (local->hw.conf.dynamic_ps_timeout > 0) { 2547 /* don't enter PS if TX frames are pending */ 2548 if (drv_tx_frames_pending(local)) { 2549 mod_timer(&local->dynamic_ps_timer, jiffies + 2550 msecs_to_jiffies( 2551 local->hw.conf.dynamic_ps_timeout)); 2552 return; 2553 } 2554 2555 /* 2556 * transmission can be stopped by others which leads to 2557 * dynamic_ps_timer expiry. Postpone the ps timer if it 2558 * is not the actual idle state. 2559 */ 2560 spin_lock_irqsave(&local->queue_stop_reason_lock, flags); 2561 for (q = 0; q < local->hw.queues; q++) { 2562 if (local->queue_stop_reasons[q]) { 2563 spin_unlock_irqrestore(&local->queue_stop_reason_lock, 2564 flags); 2565 mod_timer(&local->dynamic_ps_timer, jiffies + 2566 msecs_to_jiffies( 2567 local->hw.conf.dynamic_ps_timeout)); 2568 return; 2569 } 2570 } 2571 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags); 2572 } 2573 2574 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 2575 !(ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2576 if (drv_tx_frames_pending(local)) { 2577 mod_timer(&local->dynamic_ps_timer, jiffies + 2578 msecs_to_jiffies( 2579 local->hw.conf.dynamic_ps_timeout)); 2580 } else { 2581 ieee80211_send_nullfunc(local, sdata, true); 2582 /* Flush to get the tx status of nullfunc frame */ 2583 ieee80211_flush_queues(local, sdata, false); 2584 } 2585 } 2586 2587 if (!(ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS) && 2588 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK)) || 2589 (ifmgd->flags & IEEE80211_STA_NULLFUNC_ACKED)) { 2590 ifmgd->flags &= ~IEEE80211_STA_NULLFUNC_ACKED; 2591 local->hw.conf.flags |= IEEE80211_CONF_PS; 2592 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 2593 } 2594 } 2595 2596 void ieee80211_dynamic_ps_timer(struct timer_list *t) 2597 { 2598 struct ieee80211_local *local = from_timer(local, t, dynamic_ps_timer); 2599 2600 wiphy_work_queue(local->hw.wiphy, &local->dynamic_ps_enable_work); 2601 } 2602 2603 void ieee80211_dfs_cac_timer_work(struct wiphy *wiphy, struct wiphy_work *work) 2604 { 2605 struct ieee80211_link_data *link = 2606 container_of(work, struct ieee80211_link_data, 2607 dfs_cac_timer_work.work); 2608 struct cfg80211_chan_def chandef = link->conf->chanreq.oper; 2609 struct ieee80211_sub_if_data *sdata = link->sdata; 2610 2611 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2612 2613 if (sdata->wdev.cac_started) { 2614 ieee80211_link_release_channel(link); 2615 cfg80211_cac_event(sdata->dev, &chandef, 2616 NL80211_RADAR_CAC_FINISHED, 2617 GFP_KERNEL); 2618 } 2619 } 2620 2621 static bool 2622 __ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2623 { 2624 struct ieee80211_local *local = sdata->local; 2625 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2626 bool ret = false; 2627 int ac; 2628 2629 if (local->hw.queues < IEEE80211_NUM_ACS) 2630 return false; 2631 2632 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2633 struct ieee80211_sta_tx_tspec *tx_tspec = &ifmgd->tx_tspec[ac]; 2634 int non_acm_ac; 2635 unsigned long now = jiffies; 2636 2637 if (tx_tspec->action == TX_TSPEC_ACTION_NONE && 2638 tx_tspec->admitted_time && 2639 time_after(now, tx_tspec->time_slice_start + HZ)) { 2640 tx_tspec->consumed_tx_time = 0; 2641 tx_tspec->time_slice_start = now; 2642 2643 if (tx_tspec->downgraded) 2644 tx_tspec->action = 2645 TX_TSPEC_ACTION_STOP_DOWNGRADE; 2646 } 2647 2648 switch (tx_tspec->action) { 2649 case TX_TSPEC_ACTION_STOP_DOWNGRADE: 2650 /* take the original parameters */ 2651 if (drv_conf_tx(local, &sdata->deflink, ac, 2652 &sdata->deflink.tx_conf[ac])) 2653 link_err(&sdata->deflink, 2654 "failed to set TX queue parameters for queue %d\n", 2655 ac); 2656 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2657 tx_tspec->downgraded = false; 2658 ret = true; 2659 break; 2660 case TX_TSPEC_ACTION_DOWNGRADE: 2661 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 2662 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2663 ret = true; 2664 break; 2665 } 2666 /* downgrade next lower non-ACM AC */ 2667 for (non_acm_ac = ac + 1; 2668 non_acm_ac < IEEE80211_NUM_ACS; 2669 non_acm_ac++) 2670 if (!(sdata->wmm_acm & BIT(7 - 2 * non_acm_ac))) 2671 break; 2672 /* Usually the loop will result in using BK even if it 2673 * requires admission control, but such a configuration 2674 * makes no sense and we have to transmit somehow - the 2675 * AC selection does the same thing. 2676 * If we started out trying to downgrade from BK, then 2677 * the extra condition here might be needed. 2678 */ 2679 if (non_acm_ac >= IEEE80211_NUM_ACS) 2680 non_acm_ac = IEEE80211_AC_BK; 2681 if (drv_conf_tx(local, &sdata->deflink, ac, 2682 &sdata->deflink.tx_conf[non_acm_ac])) 2683 link_err(&sdata->deflink, 2684 "failed to set TX queue parameters for queue %d\n", 2685 ac); 2686 tx_tspec->action = TX_TSPEC_ACTION_NONE; 2687 ret = true; 2688 wiphy_delayed_work_queue(local->hw.wiphy, 2689 &ifmgd->tx_tspec_wk, 2690 tx_tspec->time_slice_start + 2691 HZ - now + 1); 2692 break; 2693 case TX_TSPEC_ACTION_NONE: 2694 /* nothing now */ 2695 break; 2696 } 2697 } 2698 2699 return ret; 2700 } 2701 2702 void ieee80211_sta_handle_tspec_ac_params(struct ieee80211_sub_if_data *sdata) 2703 { 2704 if (__ieee80211_sta_handle_tspec_ac_params(sdata)) 2705 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 2706 BSS_CHANGED_QOS); 2707 } 2708 2709 static void ieee80211_sta_handle_tspec_ac_params_wk(struct wiphy *wiphy, 2710 struct wiphy_work *work) 2711 { 2712 struct ieee80211_sub_if_data *sdata; 2713 2714 sdata = container_of(work, struct ieee80211_sub_if_data, 2715 u.mgd.tx_tspec_wk.work); 2716 ieee80211_sta_handle_tspec_ac_params(sdata); 2717 } 2718 2719 void ieee80211_mgd_set_link_qos_params(struct ieee80211_link_data *link) 2720 { 2721 struct ieee80211_sub_if_data *sdata = link->sdata; 2722 struct ieee80211_local *local = sdata->local; 2723 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2724 struct ieee80211_tx_queue_params *params = link->tx_conf; 2725 u8 ac; 2726 2727 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2728 mlme_dbg(sdata, 2729 "WMM AC=%d acm=%d aifs=%d cWmin=%d cWmax=%d txop=%d uapsd=%d, downgraded=%d\n", 2730 ac, params[ac].acm, 2731 params[ac].aifs, params[ac].cw_min, params[ac].cw_max, 2732 params[ac].txop, params[ac].uapsd, 2733 ifmgd->tx_tspec[ac].downgraded); 2734 if (!ifmgd->tx_tspec[ac].downgraded && 2735 drv_conf_tx(local, link, ac, ¶ms[ac])) 2736 link_err(link, 2737 "failed to set TX queue parameters for AC %d\n", 2738 ac); 2739 } 2740 } 2741 2742 /* MLME */ 2743 static bool 2744 ieee80211_sta_wmm_params(struct ieee80211_local *local, 2745 struct ieee80211_link_data *link, 2746 const u8 *wmm_param, size_t wmm_param_len, 2747 const struct ieee80211_mu_edca_param_set *mu_edca) 2748 { 2749 struct ieee80211_sub_if_data *sdata = link->sdata; 2750 struct ieee80211_tx_queue_params params[IEEE80211_NUM_ACS]; 2751 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 2752 size_t left; 2753 int count, mu_edca_count, ac; 2754 const u8 *pos; 2755 u8 uapsd_queues = 0; 2756 2757 if (!local->ops->conf_tx) 2758 return false; 2759 2760 if (local->hw.queues < IEEE80211_NUM_ACS) 2761 return false; 2762 2763 if (!wmm_param) 2764 return false; 2765 2766 if (wmm_param_len < 8 || wmm_param[5] /* version */ != 1) 2767 return false; 2768 2769 if (ifmgd->flags & IEEE80211_STA_UAPSD_ENABLED) 2770 uapsd_queues = ifmgd->uapsd_queues; 2771 2772 count = wmm_param[6] & 0x0f; 2773 /* -1 is the initial value of ifmgd->mu_edca_last_param_set. 2774 * if mu_edca was preset before and now it disappeared tell 2775 * the driver about it. 2776 */ 2777 mu_edca_count = mu_edca ? mu_edca->mu_qos_info & 0x0f : -1; 2778 if (count == link->u.mgd.wmm_last_param_set && 2779 mu_edca_count == link->u.mgd.mu_edca_last_param_set) 2780 return false; 2781 link->u.mgd.wmm_last_param_set = count; 2782 link->u.mgd.mu_edca_last_param_set = mu_edca_count; 2783 2784 pos = wmm_param + 8; 2785 left = wmm_param_len - 8; 2786 2787 memset(¶ms, 0, sizeof(params)); 2788 2789 sdata->wmm_acm = 0; 2790 for (; left >= 4; left -= 4, pos += 4) { 2791 int aci = (pos[0] >> 5) & 0x03; 2792 int acm = (pos[0] >> 4) & 0x01; 2793 bool uapsd = false; 2794 2795 switch (aci) { 2796 case 1: /* AC_BK */ 2797 ac = IEEE80211_AC_BK; 2798 if (acm) 2799 sdata->wmm_acm |= BIT(1) | BIT(2); /* BK/- */ 2800 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BK) 2801 uapsd = true; 2802 params[ac].mu_edca = !!mu_edca; 2803 if (mu_edca) 2804 params[ac].mu_edca_param_rec = mu_edca->ac_bk; 2805 break; 2806 case 2: /* AC_VI */ 2807 ac = IEEE80211_AC_VI; 2808 if (acm) 2809 sdata->wmm_acm |= BIT(4) | BIT(5); /* CL/VI */ 2810 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VI) 2811 uapsd = true; 2812 params[ac].mu_edca = !!mu_edca; 2813 if (mu_edca) 2814 params[ac].mu_edca_param_rec = mu_edca->ac_vi; 2815 break; 2816 case 3: /* AC_VO */ 2817 ac = IEEE80211_AC_VO; 2818 if (acm) 2819 sdata->wmm_acm |= BIT(6) | BIT(7); /* VO/NC */ 2820 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_VO) 2821 uapsd = true; 2822 params[ac].mu_edca = !!mu_edca; 2823 if (mu_edca) 2824 params[ac].mu_edca_param_rec = mu_edca->ac_vo; 2825 break; 2826 case 0: /* AC_BE */ 2827 default: 2828 ac = IEEE80211_AC_BE; 2829 if (acm) 2830 sdata->wmm_acm |= BIT(0) | BIT(3); /* BE/EE */ 2831 if (uapsd_queues & IEEE80211_WMM_IE_STA_QOSINFO_AC_BE) 2832 uapsd = true; 2833 params[ac].mu_edca = !!mu_edca; 2834 if (mu_edca) 2835 params[ac].mu_edca_param_rec = mu_edca->ac_be; 2836 break; 2837 } 2838 2839 params[ac].aifs = pos[0] & 0x0f; 2840 2841 if (params[ac].aifs < 2) { 2842 link_info(link, 2843 "AP has invalid WMM params (AIFSN=%d for ACI %d), will use 2\n", 2844 params[ac].aifs, aci); 2845 params[ac].aifs = 2; 2846 } 2847 params[ac].cw_max = ecw2cw((pos[1] & 0xf0) >> 4); 2848 params[ac].cw_min = ecw2cw(pos[1] & 0x0f); 2849 params[ac].txop = get_unaligned_le16(pos + 2); 2850 params[ac].acm = acm; 2851 params[ac].uapsd = uapsd; 2852 2853 if (params[ac].cw_min == 0 || 2854 params[ac].cw_min > params[ac].cw_max) { 2855 link_info(link, 2856 "AP has invalid WMM params (CWmin/max=%d/%d for ACI %d), using defaults\n", 2857 params[ac].cw_min, params[ac].cw_max, aci); 2858 return false; 2859 } 2860 ieee80211_regulatory_limit_wmm_params(sdata, ¶ms[ac], ac); 2861 } 2862 2863 /* WMM specification requires all 4 ACIs. */ 2864 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) { 2865 if (params[ac].cw_min == 0) { 2866 link_info(link, 2867 "AP has invalid WMM params (missing AC %d), using defaults\n", 2868 ac); 2869 return false; 2870 } 2871 } 2872 2873 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 2874 link->tx_conf[ac] = params[ac]; 2875 2876 ieee80211_mgd_set_link_qos_params(link); 2877 2878 /* enable WMM or activate new settings */ 2879 link->conf->qos = true; 2880 return true; 2881 } 2882 2883 static void __ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2884 { 2885 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2886 2887 sdata->u.mgd.flags &= ~IEEE80211_STA_CONNECTION_POLL; 2888 ieee80211_run_deferred_scan(sdata->local); 2889 } 2890 2891 static void ieee80211_stop_poll(struct ieee80211_sub_if_data *sdata) 2892 { 2893 lockdep_assert_wiphy(sdata->local->hw.wiphy); 2894 2895 __ieee80211_stop_poll(sdata); 2896 } 2897 2898 static u64 ieee80211_handle_bss_capability(struct ieee80211_link_data *link, 2899 u16 capab, bool erp_valid, u8 erp) 2900 { 2901 struct ieee80211_bss_conf *bss_conf = link->conf; 2902 struct ieee80211_supported_band *sband; 2903 u64 changed = 0; 2904 bool use_protection; 2905 bool use_short_preamble; 2906 bool use_short_slot; 2907 2908 sband = ieee80211_get_link_sband(link); 2909 if (!sband) 2910 return changed; 2911 2912 if (erp_valid) { 2913 use_protection = (erp & WLAN_ERP_USE_PROTECTION) != 0; 2914 use_short_preamble = (erp & WLAN_ERP_BARKER_PREAMBLE) == 0; 2915 } else { 2916 use_protection = false; 2917 use_short_preamble = !!(capab & WLAN_CAPABILITY_SHORT_PREAMBLE); 2918 } 2919 2920 use_short_slot = !!(capab & WLAN_CAPABILITY_SHORT_SLOT_TIME); 2921 if (sband->band == NL80211_BAND_5GHZ || 2922 sband->band == NL80211_BAND_6GHZ) 2923 use_short_slot = true; 2924 2925 if (use_protection != bss_conf->use_cts_prot) { 2926 bss_conf->use_cts_prot = use_protection; 2927 changed |= BSS_CHANGED_ERP_CTS_PROT; 2928 } 2929 2930 if (use_short_preamble != bss_conf->use_short_preamble) { 2931 bss_conf->use_short_preamble = use_short_preamble; 2932 changed |= BSS_CHANGED_ERP_PREAMBLE; 2933 } 2934 2935 if (use_short_slot != bss_conf->use_short_slot) { 2936 bss_conf->use_short_slot = use_short_slot; 2937 changed |= BSS_CHANGED_ERP_SLOT; 2938 } 2939 2940 return changed; 2941 } 2942 2943 static u64 ieee80211_link_set_associated(struct ieee80211_link_data *link, 2944 struct cfg80211_bss *cbss) 2945 { 2946 struct ieee80211_sub_if_data *sdata = link->sdata; 2947 struct ieee80211_bss_conf *bss_conf = link->conf; 2948 struct ieee80211_bss *bss = (void *)cbss->priv; 2949 u64 changed = BSS_CHANGED_QOS; 2950 2951 /* not really used in MLO */ 2952 sdata->u.mgd.beacon_timeout = 2953 usecs_to_jiffies(ieee80211_tu_to_usec(beacon_loss_count * 2954 bss_conf->beacon_int)); 2955 2956 changed |= ieee80211_handle_bss_capability(link, 2957 bss_conf->assoc_capability, 2958 bss->has_erp_value, 2959 bss->erp_value); 2960 2961 ieee80211_check_rate_mask(link); 2962 2963 link->conf->bss = cbss; 2964 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 2965 2966 if (sdata->vif.p2p || 2967 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 2968 const struct cfg80211_bss_ies *ies; 2969 2970 rcu_read_lock(); 2971 ies = rcu_dereference(cbss->ies); 2972 if (ies) { 2973 int ret; 2974 2975 ret = cfg80211_get_p2p_attr( 2976 ies->data, ies->len, 2977 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 2978 (u8 *) &bss_conf->p2p_noa_attr, 2979 sizeof(bss_conf->p2p_noa_attr)); 2980 if (ret >= 2) { 2981 link->u.mgd.p2p_noa_index = 2982 bss_conf->p2p_noa_attr.index; 2983 changed |= BSS_CHANGED_P2P_PS; 2984 } 2985 } 2986 rcu_read_unlock(); 2987 } 2988 2989 if (link->u.mgd.have_beacon) { 2990 bss_conf->beacon_rate = bss->beacon_rate; 2991 changed |= BSS_CHANGED_BEACON_INFO; 2992 } else { 2993 bss_conf->beacon_rate = NULL; 2994 } 2995 2996 /* Tell the driver to monitor connection quality (if supported) */ 2997 if (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI && 2998 bss_conf->cqm_rssi_thold) 2999 changed |= BSS_CHANGED_CQM; 3000 3001 return changed; 3002 } 3003 3004 static void ieee80211_set_associated(struct ieee80211_sub_if_data *sdata, 3005 struct ieee80211_mgd_assoc_data *assoc_data, 3006 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS]) 3007 { 3008 struct ieee80211_local *local = sdata->local; 3009 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 3010 u64 vif_changed = BSS_CHANGED_ASSOC; 3011 unsigned int link_id; 3012 3013 lockdep_assert_wiphy(local->hw.wiphy); 3014 3015 sdata->u.mgd.associated = true; 3016 3017 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 3018 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3019 struct ieee80211_link_data *link; 3020 3021 if (!cbss || 3022 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3023 continue; 3024 3025 if (ieee80211_vif_is_mld(&sdata->vif) && 3026 !(ieee80211_vif_usable_links(&sdata->vif) & BIT(link_id))) 3027 continue; 3028 3029 link = sdata_dereference(sdata->link[link_id], sdata); 3030 if (WARN_ON(!link)) 3031 return; 3032 3033 changed[link_id] |= ieee80211_link_set_associated(link, cbss); 3034 } 3035 3036 /* just to be sure */ 3037 ieee80211_stop_poll(sdata); 3038 3039 ieee80211_led_assoc(local, 1); 3040 3041 vif_cfg->assoc = 1; 3042 3043 /* Enable ARP filtering */ 3044 if (vif_cfg->arp_addr_cnt) 3045 vif_changed |= BSS_CHANGED_ARP_FILTER; 3046 3047 if (ieee80211_vif_is_mld(&sdata->vif)) { 3048 for (link_id = 0; 3049 link_id < IEEE80211_MLD_MAX_NUM_LINKS; 3050 link_id++) { 3051 struct ieee80211_link_data *link; 3052 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 3053 3054 if (!cbss || 3055 !(BIT(link_id) & 3056 ieee80211_vif_usable_links(&sdata->vif)) || 3057 assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) 3058 continue; 3059 3060 link = sdata_dereference(sdata->link[link_id], sdata); 3061 if (WARN_ON(!link)) 3062 return; 3063 3064 ieee80211_link_info_change_notify(sdata, link, 3065 changed[link_id]); 3066 3067 ieee80211_recalc_smps(sdata, link); 3068 } 3069 3070 ieee80211_vif_cfg_change_notify(sdata, vif_changed); 3071 } else { 3072 ieee80211_bss_info_change_notify(sdata, 3073 vif_changed | changed[0]); 3074 } 3075 3076 ieee80211_recalc_ps(local); 3077 3078 /* leave this here to not change ordering in non-MLO cases */ 3079 if (!ieee80211_vif_is_mld(&sdata->vif)) 3080 ieee80211_recalc_smps(sdata, &sdata->deflink); 3081 ieee80211_recalc_ps_vif(sdata); 3082 3083 netif_carrier_on(sdata->dev); 3084 } 3085 3086 static void ieee80211_set_disassoc(struct ieee80211_sub_if_data *sdata, 3087 u16 stype, u16 reason, bool tx, 3088 u8 *frame_buf) 3089 { 3090 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3091 struct ieee80211_local *local = sdata->local; 3092 unsigned int link_id; 3093 u64 changed = 0; 3094 struct ieee80211_prep_tx_info info = { 3095 .subtype = stype, 3096 }; 3097 3098 lockdep_assert_wiphy(local->hw.wiphy); 3099 3100 if (WARN_ON_ONCE(tx && !frame_buf)) 3101 return; 3102 3103 if (WARN_ON(!ifmgd->associated)) 3104 return; 3105 3106 ieee80211_stop_poll(sdata); 3107 3108 ifmgd->associated = false; 3109 3110 /* other links will be destroyed */ 3111 sdata->deflink.conf->bss = NULL; 3112 sdata->deflink.smps_mode = IEEE80211_SMPS_OFF; 3113 3114 netif_carrier_off(sdata->dev); 3115 3116 /* 3117 * if we want to get out of ps before disassoc (why?) we have 3118 * to do it before sending disassoc, as otherwise the null-packet 3119 * won't be valid. 3120 */ 3121 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 3122 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 3123 ieee80211_hw_config(local, IEEE80211_CONF_CHANGE_PS); 3124 } 3125 local->ps_sdata = NULL; 3126 3127 /* disable per-vif ps */ 3128 ieee80211_recalc_ps_vif(sdata); 3129 3130 /* make sure ongoing transmission finishes */ 3131 synchronize_net(); 3132 3133 /* 3134 * drop any frame before deauth/disassoc, this can be data or 3135 * management frame. Since we are disconnecting, we should not 3136 * insist sending these frames which can take time and delay 3137 * the disconnection and possible the roaming. 3138 */ 3139 if (tx) 3140 ieee80211_flush_queues(local, sdata, true); 3141 3142 /* deauthenticate/disassociate now */ 3143 if (tx || frame_buf) { 3144 /* 3145 * In multi channel scenarios guarantee that the virtual 3146 * interface is granted immediate airtime to transmit the 3147 * deauthentication frame by calling mgd_prepare_tx, if the 3148 * driver requested so. 3149 */ 3150 if (ieee80211_hw_check(&local->hw, DEAUTH_NEED_MGD_TX_PREP)) { 3151 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); 3152 link_id++) { 3153 struct ieee80211_link_data *link; 3154 3155 link = sdata_dereference(sdata->link[link_id], 3156 sdata); 3157 if (!link) 3158 continue; 3159 if (link->u.mgd.have_beacon) 3160 break; 3161 } 3162 if (link_id == IEEE80211_MLD_MAX_NUM_LINKS) { 3163 info.link_id = ffs(sdata->vif.active_links) - 1; 3164 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3165 } 3166 } 3167 3168 ieee80211_send_deauth_disassoc(sdata, sdata->vif.cfg.ap_addr, 3169 sdata->vif.cfg.ap_addr, stype, 3170 reason, tx, frame_buf); 3171 } 3172 3173 /* flush out frame - make sure the deauth was actually sent */ 3174 if (tx) 3175 ieee80211_flush_queues(local, sdata, false); 3176 3177 drv_mgd_complete_tx(sdata->local, sdata, &info); 3178 3179 /* clear AP addr only after building the needed mgmt frames */ 3180 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3181 eth_zero_addr(sdata->vif.cfg.ap_addr); 3182 3183 sdata->vif.cfg.ssid_len = 0; 3184 3185 /* remove AP and TDLS peers */ 3186 sta_info_flush(sdata, -1); 3187 3188 /* finally reset all BSS / config parameters */ 3189 if (!ieee80211_vif_is_mld(&sdata->vif)) 3190 changed |= ieee80211_reset_erp_info(sdata); 3191 3192 ieee80211_led_assoc(local, 0); 3193 changed |= BSS_CHANGED_ASSOC; 3194 sdata->vif.cfg.assoc = false; 3195 3196 sdata->deflink.u.mgd.p2p_noa_index = -1; 3197 memset(&sdata->vif.bss_conf.p2p_noa_attr, 0, 3198 sizeof(sdata->vif.bss_conf.p2p_noa_attr)); 3199 3200 /* on the next assoc, re-program HT/VHT parameters */ 3201 memset(&ifmgd->ht_capa, 0, sizeof(ifmgd->ht_capa)); 3202 memset(&ifmgd->ht_capa_mask, 0, sizeof(ifmgd->ht_capa_mask)); 3203 memset(&ifmgd->vht_capa, 0, sizeof(ifmgd->vht_capa)); 3204 memset(&ifmgd->vht_capa_mask, 0, sizeof(ifmgd->vht_capa_mask)); 3205 3206 /* 3207 * reset MU-MIMO ownership and group data in default link, 3208 * if used, other links are destroyed 3209 */ 3210 memset(sdata->vif.bss_conf.mu_group.membership, 0, 3211 sizeof(sdata->vif.bss_conf.mu_group.membership)); 3212 memset(sdata->vif.bss_conf.mu_group.position, 0, 3213 sizeof(sdata->vif.bss_conf.mu_group.position)); 3214 if (!ieee80211_vif_is_mld(&sdata->vif)) 3215 changed |= BSS_CHANGED_MU_GROUPS; 3216 sdata->vif.bss_conf.mu_mimo_owner = false; 3217 3218 sdata->deflink.ap_power_level = IEEE80211_UNSET_POWER_LEVEL; 3219 3220 del_timer_sync(&local->dynamic_ps_timer); 3221 wiphy_work_cancel(local->hw.wiphy, &local->dynamic_ps_enable_work); 3222 3223 /* Disable ARP filtering */ 3224 if (sdata->vif.cfg.arp_addr_cnt) 3225 changed |= BSS_CHANGED_ARP_FILTER; 3226 3227 sdata->vif.bss_conf.qos = false; 3228 if (!ieee80211_vif_is_mld(&sdata->vif)) { 3229 changed |= BSS_CHANGED_QOS; 3230 /* The BSSID (not really interesting) and HT changed */ 3231 changed |= BSS_CHANGED_BSSID | BSS_CHANGED_HT; 3232 ieee80211_bss_info_change_notify(sdata, changed); 3233 } else { 3234 ieee80211_vif_cfg_change_notify(sdata, changed); 3235 } 3236 3237 /* disassociated - set to defaults now */ 3238 ieee80211_set_wmm_default(&sdata->deflink, false, false); 3239 3240 del_timer_sync(&sdata->u.mgd.conn_mon_timer); 3241 del_timer_sync(&sdata->u.mgd.bcn_mon_timer); 3242 del_timer_sync(&sdata->u.mgd.timer); 3243 3244 sdata->vif.bss_conf.dtim_period = 0; 3245 sdata->vif.bss_conf.beacon_rate = NULL; 3246 3247 sdata->deflink.u.mgd.have_beacon = false; 3248 sdata->deflink.u.mgd.tracking_signal_avg = false; 3249 sdata->deflink.u.mgd.disable_wmm_tracking = false; 3250 3251 ifmgd->flags = 0; 3252 3253 for (link_id = 0; link_id < ARRAY_SIZE(sdata->link); link_id++) { 3254 struct ieee80211_link_data *link; 3255 3256 link = sdata_dereference(sdata->link[link_id], sdata); 3257 if (!link) 3258 continue; 3259 ieee80211_link_release_channel(link); 3260 } 3261 3262 sdata->vif.bss_conf.csa_active = false; 3263 sdata->deflink.u.mgd.csa_blocked_tx = false; 3264 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3265 sdata->deflink.u.mgd.csa_ignored_same_chan = false; 3266 if (sdata->csa_blocked_queues) { 3267 ieee80211_wake_vif_queues(local, sdata, 3268 IEEE80211_QUEUE_STOP_REASON_CSA); 3269 sdata->csa_blocked_queues = false; 3270 } 3271 3272 /* existing TX TSPEC sessions no longer exist */ 3273 memset(ifmgd->tx_tspec, 0, sizeof(ifmgd->tx_tspec)); 3274 wiphy_delayed_work_cancel(local->hw.wiphy, &ifmgd->tx_tspec_wk); 3275 3276 sdata->vif.bss_conf.power_type = IEEE80211_REG_UNSET_AP; 3277 sdata->vif.bss_conf.pwr_reduction = 0; 3278 sdata->vif.bss_conf.tx_pwr_env_num = 0; 3279 memset(sdata->vif.bss_conf.tx_pwr_env, 0, 3280 sizeof(sdata->vif.bss_conf.tx_pwr_env)); 3281 3282 sdata->vif.cfg.eml_cap = 0; 3283 sdata->vif.cfg.eml_med_sync_delay = 0; 3284 sdata->vif.cfg.mld_capa_op = 0; 3285 3286 memset(&sdata->u.mgd.ttlm_info, 0, 3287 sizeof(sdata->u.mgd.ttlm_info)); 3288 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 3289 3290 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 3291 &ifmgd->neg_ttlm_timeout_work); 3292 ieee80211_vif_set_links(sdata, 0, 0); 3293 3294 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 3295 } 3296 3297 static void ieee80211_reset_ap_probe(struct ieee80211_sub_if_data *sdata) 3298 { 3299 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3300 struct ieee80211_local *local = sdata->local; 3301 3302 lockdep_assert_wiphy(local->hw.wiphy); 3303 3304 if (!(ifmgd->flags & IEEE80211_STA_CONNECTION_POLL)) 3305 return; 3306 3307 __ieee80211_stop_poll(sdata); 3308 3309 ieee80211_recalc_ps(local); 3310 3311 if (ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 3312 return; 3313 3314 /* 3315 * We've received a probe response, but are not sure whether 3316 * we have or will be receiving any beacons or data, so let's 3317 * schedule the timers again, just in case. 3318 */ 3319 ieee80211_sta_reset_beacon_monitor(sdata); 3320 3321 mod_timer(&ifmgd->conn_mon_timer, 3322 round_jiffies_up(jiffies + 3323 IEEE80211_CONNECTION_IDLE_TIME)); 3324 } 3325 3326 static void ieee80211_sta_tx_wmm_ac_notify(struct ieee80211_sub_if_data *sdata, 3327 struct ieee80211_hdr *hdr, 3328 u16 tx_time) 3329 { 3330 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3331 u16 tid; 3332 int ac; 3333 struct ieee80211_sta_tx_tspec *tx_tspec; 3334 unsigned long now = jiffies; 3335 3336 if (!ieee80211_is_data_qos(hdr->frame_control)) 3337 return; 3338 3339 tid = ieee80211_get_tid(hdr); 3340 ac = ieee80211_ac_from_tid(tid); 3341 tx_tspec = &ifmgd->tx_tspec[ac]; 3342 3343 if (likely(!tx_tspec->admitted_time)) 3344 return; 3345 3346 if (time_after(now, tx_tspec->time_slice_start + HZ)) { 3347 tx_tspec->consumed_tx_time = 0; 3348 tx_tspec->time_slice_start = now; 3349 3350 if (tx_tspec->downgraded) { 3351 tx_tspec->action = TX_TSPEC_ACTION_STOP_DOWNGRADE; 3352 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3353 &ifmgd->tx_tspec_wk, 0); 3354 } 3355 } 3356 3357 if (tx_tspec->downgraded) 3358 return; 3359 3360 tx_tspec->consumed_tx_time += tx_time; 3361 3362 if (tx_tspec->consumed_tx_time >= tx_tspec->admitted_time) { 3363 tx_tspec->downgraded = true; 3364 tx_tspec->action = TX_TSPEC_ACTION_DOWNGRADE; 3365 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 3366 &ifmgd->tx_tspec_wk, 0); 3367 } 3368 } 3369 3370 void ieee80211_sta_tx_notify(struct ieee80211_sub_if_data *sdata, 3371 struct ieee80211_hdr *hdr, bool ack, u16 tx_time) 3372 { 3373 ieee80211_sta_tx_wmm_ac_notify(sdata, hdr, tx_time); 3374 3375 if (!ieee80211_is_any_nullfunc(hdr->frame_control) || 3376 !sdata->u.mgd.probe_send_count) 3377 return; 3378 3379 if (ack) 3380 sdata->u.mgd.probe_send_count = 0; 3381 else 3382 sdata->u.mgd.nullfunc_failed = true; 3383 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 3384 } 3385 3386 static void ieee80211_mlme_send_probe_req(struct ieee80211_sub_if_data *sdata, 3387 const u8 *src, const u8 *dst, 3388 const u8 *ssid, size_t ssid_len, 3389 struct ieee80211_channel *channel) 3390 { 3391 struct sk_buff *skb; 3392 3393 skb = ieee80211_build_probe_req(sdata, src, dst, (u32)-1, channel, 3394 ssid, ssid_len, NULL, 0, 3395 IEEE80211_PROBE_FLAG_DIRECTED); 3396 if (skb) 3397 ieee80211_tx_skb(sdata, skb); 3398 } 3399 3400 static void ieee80211_mgd_probe_ap_send(struct ieee80211_sub_if_data *sdata) 3401 { 3402 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3403 u8 *dst = sdata->vif.cfg.ap_addr; 3404 u8 unicast_limit = max(1, max_probe_tries - 3); 3405 struct sta_info *sta; 3406 3407 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3408 3409 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 3410 return; 3411 3412 /* 3413 * Try sending broadcast probe requests for the last three 3414 * probe requests after the first ones failed since some 3415 * buggy APs only support broadcast probe requests. 3416 */ 3417 if (ifmgd->probe_send_count >= unicast_limit) 3418 dst = NULL; 3419 3420 /* 3421 * When the hardware reports an accurate Tx ACK status, it's 3422 * better to send a nullfunc frame instead of a probe request, 3423 * as it will kick us off the AP quickly if we aren't associated 3424 * anymore. The timeout will be reset if the frame is ACKed by 3425 * the AP. 3426 */ 3427 ifmgd->probe_send_count++; 3428 3429 if (dst) { 3430 sta = sta_info_get(sdata, dst); 3431 if (!WARN_ON(!sta)) 3432 ieee80211_check_fast_rx(sta); 3433 } 3434 3435 if (ieee80211_hw_check(&sdata->local->hw, REPORTS_TX_ACK_STATUS)) { 3436 ifmgd->nullfunc_failed = false; 3437 ieee80211_send_nullfunc(sdata->local, sdata, false); 3438 } else { 3439 ieee80211_mlme_send_probe_req(sdata, sdata->vif.addr, dst, 3440 sdata->vif.cfg.ssid, 3441 sdata->vif.cfg.ssid_len, 3442 sdata->deflink.conf->bss->channel); 3443 } 3444 3445 ifmgd->probe_timeout = jiffies + msecs_to_jiffies(probe_wait_ms); 3446 run_again(sdata, ifmgd->probe_timeout); 3447 } 3448 3449 static void ieee80211_mgd_probe_ap(struct ieee80211_sub_if_data *sdata, 3450 bool beacon) 3451 { 3452 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3453 bool already = false; 3454 3455 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3456 3457 if (WARN_ON_ONCE(ieee80211_vif_is_mld(&sdata->vif))) 3458 return; 3459 3460 if (!ieee80211_sdata_running(sdata)) 3461 return; 3462 3463 if (!ifmgd->associated) 3464 return; 3465 3466 if (sdata->local->tmp_channel || sdata->local->scanning) 3467 return; 3468 3469 if (sdata->local->suspending) { 3470 /* reschedule after resume */ 3471 ieee80211_reset_ap_probe(sdata); 3472 return; 3473 } 3474 3475 if (beacon) { 3476 mlme_dbg_ratelimited(sdata, 3477 "detected beacon loss from AP (missed %d beacons) - probing\n", 3478 beacon_loss_count); 3479 3480 ieee80211_cqm_beacon_loss_notify(&sdata->vif, GFP_KERNEL); 3481 } 3482 3483 /* 3484 * The driver/our work has already reported this event or the 3485 * connection monitoring has kicked in and we have already sent 3486 * a probe request. Or maybe the AP died and the driver keeps 3487 * reporting until we disassociate... 3488 * 3489 * In either case we have to ignore the current call to this 3490 * function (except for setting the correct probe reason bit) 3491 * because otherwise we would reset the timer every time and 3492 * never check whether we received a probe response! 3493 */ 3494 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) 3495 already = true; 3496 3497 ifmgd->flags |= IEEE80211_STA_CONNECTION_POLL; 3498 3499 if (already) 3500 return; 3501 3502 ieee80211_recalc_ps(sdata->local); 3503 3504 ifmgd->probe_send_count = 0; 3505 ieee80211_mgd_probe_ap_send(sdata); 3506 } 3507 3508 struct sk_buff *ieee80211_ap_probereq_get(struct ieee80211_hw *hw, 3509 struct ieee80211_vif *vif) 3510 { 3511 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3512 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3513 struct cfg80211_bss *cbss; 3514 struct sk_buff *skb; 3515 const struct element *ssid; 3516 int ssid_len; 3517 3518 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3519 3520 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION || 3521 ieee80211_vif_is_mld(&sdata->vif))) 3522 return NULL; 3523 3524 if (ifmgd->associated) 3525 cbss = sdata->deflink.conf->bss; 3526 else if (ifmgd->auth_data) 3527 cbss = ifmgd->auth_data->bss; 3528 else if (ifmgd->assoc_data && ifmgd->assoc_data->link[0].bss) 3529 cbss = ifmgd->assoc_data->link[0].bss; 3530 else 3531 return NULL; 3532 3533 rcu_read_lock(); 3534 ssid = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 3535 if (WARN_ONCE(!ssid || ssid->datalen > IEEE80211_MAX_SSID_LEN, 3536 "invalid SSID element (len=%d)", 3537 ssid ? ssid->datalen : -1)) 3538 ssid_len = 0; 3539 else 3540 ssid_len = ssid->datalen; 3541 3542 skb = ieee80211_build_probe_req(sdata, sdata->vif.addr, cbss->bssid, 3543 (u32) -1, cbss->channel, 3544 ssid->data, ssid_len, 3545 NULL, 0, IEEE80211_PROBE_FLAG_DIRECTED); 3546 rcu_read_unlock(); 3547 3548 return skb; 3549 } 3550 EXPORT_SYMBOL(ieee80211_ap_probereq_get); 3551 3552 static void ieee80211_report_disconnect(struct ieee80211_sub_if_data *sdata, 3553 const u8 *buf, size_t len, bool tx, 3554 u16 reason, bool reconnect) 3555 { 3556 struct ieee80211_event event = { 3557 .type = MLME_EVENT, 3558 .u.mlme.data = tx ? DEAUTH_TX_EVENT : DEAUTH_RX_EVENT, 3559 .u.mlme.reason = reason, 3560 }; 3561 3562 if (tx) 3563 cfg80211_tx_mlme_mgmt(sdata->dev, buf, len, reconnect); 3564 else 3565 cfg80211_rx_mlme_mgmt(sdata->dev, buf, len); 3566 3567 drv_event_callback(sdata->local, sdata, &event); 3568 } 3569 3570 static void __ieee80211_disconnect(struct ieee80211_sub_if_data *sdata) 3571 { 3572 struct ieee80211_local *local = sdata->local; 3573 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3574 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 3575 bool tx = false; 3576 3577 lockdep_assert_wiphy(local->hw.wiphy); 3578 3579 if (!ifmgd->associated) 3580 return; 3581 3582 /* only transmit if we have a link that makes that worthwhile */ 3583 for (unsigned int link_id = 0; 3584 link_id < ARRAY_SIZE(sdata->link); 3585 link_id++) { 3586 struct ieee80211_link_data *link; 3587 3588 if (!ieee80211_vif_link_active(&sdata->vif, link_id)) 3589 continue; 3590 3591 link = sdata_dereference(sdata->link[link_id], sdata); 3592 if (WARN_ON_ONCE(!link)) 3593 continue; 3594 3595 if (link->u.mgd.csa_blocked_tx) 3596 continue; 3597 3598 tx = true; 3599 break; 3600 } 3601 3602 if (!ifmgd->driver_disconnect) { 3603 unsigned int link_id; 3604 3605 /* 3606 * AP is probably out of range (or not reachable for another 3607 * reason) so remove the bss structs for that AP. In the case 3608 * of multi-link, it's not clear that all of them really are 3609 * out of range, but if they weren't the driver likely would 3610 * have switched to just have a single link active? 3611 */ 3612 for (link_id = 0; 3613 link_id < ARRAY_SIZE(sdata->link); 3614 link_id++) { 3615 struct ieee80211_link_data *link; 3616 3617 link = sdata_dereference(sdata->link[link_id], sdata); 3618 if (!link) 3619 continue; 3620 cfg80211_unlink_bss(local->hw.wiphy, link->conf->bss); 3621 link->conf->bss = NULL; 3622 } 3623 } 3624 3625 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 3626 ifmgd->driver_disconnect ? 3627 WLAN_REASON_DEAUTH_LEAVING : 3628 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3629 tx, frame_buf); 3630 /* the other links will be destroyed */ 3631 sdata->vif.bss_conf.csa_active = false; 3632 sdata->deflink.u.mgd.csa_waiting_bcn = false; 3633 sdata->deflink.u.mgd.csa_blocked_tx = false; 3634 if (sdata->csa_blocked_queues) { 3635 ieee80211_wake_vif_queues(local, sdata, 3636 IEEE80211_QUEUE_STOP_REASON_CSA); 3637 sdata->csa_blocked_queues = false; 3638 } 3639 3640 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), tx, 3641 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 3642 ifmgd->reconnect); 3643 ifmgd->reconnect = false; 3644 } 3645 3646 static void ieee80211_beacon_connection_loss_work(struct wiphy *wiphy, 3647 struct wiphy_work *work) 3648 { 3649 struct ieee80211_sub_if_data *sdata = 3650 container_of(work, struct ieee80211_sub_if_data, 3651 u.mgd.beacon_connection_loss_work); 3652 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3653 3654 if (ifmgd->connection_loss) { 3655 sdata_info(sdata, "Connection to AP %pM lost\n", 3656 sdata->vif.cfg.ap_addr); 3657 __ieee80211_disconnect(sdata); 3658 ifmgd->connection_loss = false; 3659 } else if (ifmgd->driver_disconnect) { 3660 sdata_info(sdata, 3661 "Driver requested disconnection from AP %pM\n", 3662 sdata->vif.cfg.ap_addr); 3663 __ieee80211_disconnect(sdata); 3664 ifmgd->driver_disconnect = false; 3665 } else { 3666 if (ifmgd->associated) 3667 sdata->deflink.u.mgd.beacon_loss_count++; 3668 ieee80211_mgd_probe_ap(sdata, true); 3669 } 3670 } 3671 3672 static void ieee80211_csa_connection_drop_work(struct wiphy *wiphy, 3673 struct wiphy_work *work) 3674 { 3675 struct ieee80211_sub_if_data *sdata = 3676 container_of(work, struct ieee80211_sub_if_data, 3677 u.mgd.csa_connection_drop_work); 3678 3679 __ieee80211_disconnect(sdata); 3680 } 3681 3682 void ieee80211_beacon_loss(struct ieee80211_vif *vif) 3683 { 3684 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3685 struct ieee80211_hw *hw = &sdata->local->hw; 3686 3687 trace_api_beacon_loss(sdata); 3688 3689 sdata->u.mgd.connection_loss = false; 3690 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3691 } 3692 EXPORT_SYMBOL(ieee80211_beacon_loss); 3693 3694 void ieee80211_connection_loss(struct ieee80211_vif *vif) 3695 { 3696 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3697 struct ieee80211_hw *hw = &sdata->local->hw; 3698 3699 trace_api_connection_loss(sdata); 3700 3701 sdata->u.mgd.connection_loss = true; 3702 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3703 } 3704 EXPORT_SYMBOL(ieee80211_connection_loss); 3705 3706 void ieee80211_disconnect(struct ieee80211_vif *vif, bool reconnect) 3707 { 3708 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 3709 struct ieee80211_hw *hw = &sdata->local->hw; 3710 3711 trace_api_disconnect(sdata, reconnect); 3712 3713 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 3714 return; 3715 3716 sdata->u.mgd.driver_disconnect = true; 3717 sdata->u.mgd.reconnect = reconnect; 3718 wiphy_work_queue(hw->wiphy, &sdata->u.mgd.beacon_connection_loss_work); 3719 } 3720 EXPORT_SYMBOL(ieee80211_disconnect); 3721 3722 static void ieee80211_destroy_auth_data(struct ieee80211_sub_if_data *sdata, 3723 bool assoc) 3724 { 3725 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3726 3727 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3728 3729 if (!assoc) { 3730 /* 3731 * we are not authenticated yet, the only timer that could be 3732 * running is the timeout for the authentication response which 3733 * which is not relevant anymore. 3734 */ 3735 del_timer_sync(&sdata->u.mgd.timer); 3736 sta_info_destroy_addr(sdata, auth_data->ap_addr); 3737 3738 /* other links are destroyed */ 3739 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3740 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3741 BSS_CHANGED_BSSID); 3742 sdata->u.mgd.flags = 0; 3743 3744 ieee80211_link_release_channel(&sdata->deflink); 3745 ieee80211_vif_set_links(sdata, 0, 0); 3746 } 3747 3748 cfg80211_put_bss(sdata->local->hw.wiphy, auth_data->bss); 3749 kfree(auth_data); 3750 sdata->u.mgd.auth_data = NULL; 3751 } 3752 3753 enum assoc_status { 3754 ASSOC_SUCCESS, 3755 ASSOC_REJECTED, 3756 ASSOC_TIMEOUT, 3757 ASSOC_ABANDON, 3758 }; 3759 3760 static void ieee80211_destroy_assoc_data(struct ieee80211_sub_if_data *sdata, 3761 enum assoc_status status) 3762 { 3763 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 3764 3765 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3766 3767 if (status != ASSOC_SUCCESS) { 3768 /* 3769 * we are not associated yet, the only timer that could be 3770 * running is the timeout for the association response which 3771 * which is not relevant anymore. 3772 */ 3773 del_timer_sync(&sdata->u.mgd.timer); 3774 sta_info_destroy_addr(sdata, assoc_data->ap_addr); 3775 3776 eth_zero_addr(sdata->deflink.u.mgd.bssid); 3777 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 3778 BSS_CHANGED_BSSID); 3779 sdata->u.mgd.flags = 0; 3780 sdata->vif.bss_conf.mu_mimo_owner = false; 3781 3782 if (status != ASSOC_REJECTED) { 3783 struct cfg80211_assoc_failure data = { 3784 .timeout = status == ASSOC_TIMEOUT, 3785 }; 3786 int i; 3787 3788 BUILD_BUG_ON(ARRAY_SIZE(data.bss) != 3789 ARRAY_SIZE(assoc_data->link)); 3790 3791 for (i = 0; i < ARRAY_SIZE(data.bss); i++) 3792 data.bss[i] = assoc_data->link[i].bss; 3793 3794 if (ieee80211_vif_is_mld(&sdata->vif)) 3795 data.ap_mld_addr = assoc_data->ap_addr; 3796 3797 cfg80211_assoc_failure(sdata->dev, &data); 3798 } 3799 3800 ieee80211_link_release_channel(&sdata->deflink); 3801 ieee80211_vif_set_links(sdata, 0, 0); 3802 } 3803 3804 kfree(assoc_data); 3805 sdata->u.mgd.assoc_data = NULL; 3806 } 3807 3808 static void ieee80211_auth_challenge(struct ieee80211_sub_if_data *sdata, 3809 struct ieee80211_mgmt *mgmt, size_t len) 3810 { 3811 struct ieee80211_local *local = sdata->local; 3812 struct ieee80211_mgd_auth_data *auth_data = sdata->u.mgd.auth_data; 3813 const struct element *challenge; 3814 u8 *pos; 3815 u32 tx_flags = 0; 3816 struct ieee80211_prep_tx_info info = { 3817 .subtype = IEEE80211_STYPE_AUTH, 3818 .link_id = auth_data->link_id, 3819 }; 3820 3821 pos = mgmt->u.auth.variable; 3822 challenge = cfg80211_find_elem(WLAN_EID_CHALLENGE, pos, 3823 len - (pos - (u8 *)mgmt)); 3824 if (!challenge) 3825 return; 3826 auth_data->expected_transaction = 4; 3827 drv_mgd_prepare_tx(sdata->local, sdata, &info); 3828 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 3829 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 3830 IEEE80211_TX_INTFL_MLME_CONN_TX; 3831 ieee80211_send_auth(sdata, 3, auth_data->algorithm, 0, 3832 (void *)challenge, 3833 challenge->datalen + sizeof(*challenge), 3834 auth_data->ap_addr, auth_data->ap_addr, 3835 auth_data->key, auth_data->key_len, 3836 auth_data->key_idx, tx_flags); 3837 } 3838 3839 static bool ieee80211_mark_sta_auth(struct ieee80211_sub_if_data *sdata) 3840 { 3841 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3842 const u8 *ap_addr = ifmgd->auth_data->ap_addr; 3843 struct sta_info *sta; 3844 3845 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3846 3847 sdata_info(sdata, "authenticated\n"); 3848 ifmgd->auth_data->done = true; 3849 ifmgd->auth_data->timeout = jiffies + IEEE80211_AUTH_WAIT_ASSOC; 3850 ifmgd->auth_data->timeout_started = true; 3851 run_again(sdata, ifmgd->auth_data->timeout); 3852 3853 /* move station state to auth */ 3854 sta = sta_info_get(sdata, ap_addr); 3855 if (!sta) { 3856 WARN_ONCE(1, "%s: STA %pM not found", sdata->name, ap_addr); 3857 return false; 3858 } 3859 if (sta_info_move_state(sta, IEEE80211_STA_AUTH)) { 3860 sdata_info(sdata, "failed moving %pM to auth\n", ap_addr); 3861 return false; 3862 } 3863 3864 return true; 3865 } 3866 3867 static void ieee80211_rx_mgmt_auth(struct ieee80211_sub_if_data *sdata, 3868 struct ieee80211_mgmt *mgmt, size_t len) 3869 { 3870 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 3871 u16 auth_alg, auth_transaction, status_code; 3872 struct ieee80211_event event = { 3873 .type = MLME_EVENT, 3874 .u.mlme.data = AUTH_EVENT, 3875 }; 3876 struct ieee80211_prep_tx_info info = { 3877 .subtype = IEEE80211_STYPE_AUTH, 3878 }; 3879 3880 lockdep_assert_wiphy(sdata->local->hw.wiphy); 3881 3882 if (len < 24 + 6) 3883 return; 3884 3885 if (!ifmgd->auth_data || ifmgd->auth_data->done) 3886 return; 3887 3888 if (!ether_addr_equal(ifmgd->auth_data->ap_addr, mgmt->bssid)) 3889 return; 3890 3891 auth_alg = le16_to_cpu(mgmt->u.auth.auth_alg); 3892 auth_transaction = le16_to_cpu(mgmt->u.auth.auth_transaction); 3893 status_code = le16_to_cpu(mgmt->u.auth.status_code); 3894 3895 if (auth_alg != ifmgd->auth_data->algorithm || 3896 (auth_alg != WLAN_AUTH_SAE && 3897 auth_transaction != ifmgd->auth_data->expected_transaction) || 3898 (auth_alg == WLAN_AUTH_SAE && 3899 (auth_transaction < ifmgd->auth_data->expected_transaction || 3900 auth_transaction > 2))) { 3901 sdata_info(sdata, "%pM unexpected authentication state: alg %d (expected %d) transact %d (expected %d)\n", 3902 mgmt->sa, auth_alg, ifmgd->auth_data->algorithm, 3903 auth_transaction, 3904 ifmgd->auth_data->expected_transaction); 3905 goto notify_driver; 3906 } 3907 3908 if (status_code != WLAN_STATUS_SUCCESS) { 3909 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3910 3911 if (auth_alg == WLAN_AUTH_SAE && 3912 (status_code == WLAN_STATUS_ANTI_CLOG_REQUIRED || 3913 (auth_transaction == 1 && 3914 (status_code == WLAN_STATUS_SAE_HASH_TO_ELEMENT || 3915 status_code == WLAN_STATUS_SAE_PK)))) { 3916 /* waiting for userspace now */ 3917 ifmgd->auth_data->waiting = true; 3918 ifmgd->auth_data->timeout = 3919 jiffies + IEEE80211_AUTH_WAIT_SAE_RETRY; 3920 ifmgd->auth_data->timeout_started = true; 3921 run_again(sdata, ifmgd->auth_data->timeout); 3922 goto notify_driver; 3923 } 3924 3925 sdata_info(sdata, "%pM denied authentication (status %d)\n", 3926 mgmt->sa, status_code); 3927 ieee80211_destroy_auth_data(sdata, false); 3928 event.u.mlme.status = MLME_DENIED; 3929 event.u.mlme.reason = status_code; 3930 drv_event_callback(sdata->local, sdata, &event); 3931 goto notify_driver; 3932 } 3933 3934 switch (ifmgd->auth_data->algorithm) { 3935 case WLAN_AUTH_OPEN: 3936 case WLAN_AUTH_LEAP: 3937 case WLAN_AUTH_FT: 3938 case WLAN_AUTH_SAE: 3939 case WLAN_AUTH_FILS_SK: 3940 case WLAN_AUTH_FILS_SK_PFS: 3941 case WLAN_AUTH_FILS_PK: 3942 break; 3943 case WLAN_AUTH_SHARED_KEY: 3944 if (ifmgd->auth_data->expected_transaction != 4) { 3945 ieee80211_auth_challenge(sdata, mgmt, len); 3946 /* need another frame */ 3947 return; 3948 } 3949 break; 3950 default: 3951 WARN_ONCE(1, "invalid auth alg %d", 3952 ifmgd->auth_data->algorithm); 3953 goto notify_driver; 3954 } 3955 3956 event.u.mlme.status = MLME_SUCCESS; 3957 info.success = 1; 3958 drv_event_callback(sdata->local, sdata, &event); 3959 if (ifmgd->auth_data->algorithm != WLAN_AUTH_SAE || 3960 (auth_transaction == 2 && 3961 ifmgd->auth_data->expected_transaction == 2)) { 3962 if (!ieee80211_mark_sta_auth(sdata)) 3963 return; /* ignore frame -- wait for timeout */ 3964 } else if (ifmgd->auth_data->algorithm == WLAN_AUTH_SAE && 3965 auth_transaction == 2) { 3966 sdata_info(sdata, "SAE peer confirmed\n"); 3967 ifmgd->auth_data->peer_confirmed = true; 3968 } 3969 3970 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 3971 notify_driver: 3972 drv_mgd_complete_tx(sdata->local, sdata, &info); 3973 } 3974 3975 #define case_WLAN(type) \ 3976 case WLAN_REASON_##type: return #type 3977 3978 const char *ieee80211_get_reason_code_string(u16 reason_code) 3979 { 3980 switch (reason_code) { 3981 case_WLAN(UNSPECIFIED); 3982 case_WLAN(PREV_AUTH_NOT_VALID); 3983 case_WLAN(DEAUTH_LEAVING); 3984 case_WLAN(DISASSOC_DUE_TO_INACTIVITY); 3985 case_WLAN(DISASSOC_AP_BUSY); 3986 case_WLAN(CLASS2_FRAME_FROM_NONAUTH_STA); 3987 case_WLAN(CLASS3_FRAME_FROM_NONASSOC_STA); 3988 case_WLAN(DISASSOC_STA_HAS_LEFT); 3989 case_WLAN(STA_REQ_ASSOC_WITHOUT_AUTH); 3990 case_WLAN(DISASSOC_BAD_POWER); 3991 case_WLAN(DISASSOC_BAD_SUPP_CHAN); 3992 case_WLAN(INVALID_IE); 3993 case_WLAN(MIC_FAILURE); 3994 case_WLAN(4WAY_HANDSHAKE_TIMEOUT); 3995 case_WLAN(GROUP_KEY_HANDSHAKE_TIMEOUT); 3996 case_WLAN(IE_DIFFERENT); 3997 case_WLAN(INVALID_GROUP_CIPHER); 3998 case_WLAN(INVALID_PAIRWISE_CIPHER); 3999 case_WLAN(INVALID_AKMP); 4000 case_WLAN(UNSUPP_RSN_VERSION); 4001 case_WLAN(INVALID_RSN_IE_CAP); 4002 case_WLAN(IEEE8021X_FAILED); 4003 case_WLAN(CIPHER_SUITE_REJECTED); 4004 case_WLAN(DISASSOC_UNSPECIFIED_QOS); 4005 case_WLAN(DISASSOC_QAP_NO_BANDWIDTH); 4006 case_WLAN(DISASSOC_LOW_ACK); 4007 case_WLAN(DISASSOC_QAP_EXCEED_TXOP); 4008 case_WLAN(QSTA_LEAVE_QBSS); 4009 case_WLAN(QSTA_NOT_USE); 4010 case_WLAN(QSTA_REQUIRE_SETUP); 4011 case_WLAN(QSTA_TIMEOUT); 4012 case_WLAN(QSTA_CIPHER_NOT_SUPP); 4013 case_WLAN(MESH_PEER_CANCELED); 4014 case_WLAN(MESH_MAX_PEERS); 4015 case_WLAN(MESH_CONFIG); 4016 case_WLAN(MESH_CLOSE); 4017 case_WLAN(MESH_MAX_RETRIES); 4018 case_WLAN(MESH_CONFIRM_TIMEOUT); 4019 case_WLAN(MESH_INVALID_GTK); 4020 case_WLAN(MESH_INCONSISTENT_PARAM); 4021 case_WLAN(MESH_INVALID_SECURITY); 4022 case_WLAN(MESH_PATH_ERROR); 4023 case_WLAN(MESH_PATH_NOFORWARD); 4024 case_WLAN(MESH_PATH_DEST_UNREACHABLE); 4025 case_WLAN(MAC_EXISTS_IN_MBSS); 4026 case_WLAN(MESH_CHAN_REGULATORY); 4027 case_WLAN(MESH_CHAN); 4028 default: return "<unknown>"; 4029 } 4030 } 4031 4032 static void ieee80211_rx_mgmt_deauth(struct ieee80211_sub_if_data *sdata, 4033 struct ieee80211_mgmt *mgmt, size_t len) 4034 { 4035 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4036 u16 reason_code = le16_to_cpu(mgmt->u.deauth.reason_code); 4037 4038 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4039 4040 if (len < 24 + 2) 4041 return; 4042 4043 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4044 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4045 return; 4046 } 4047 4048 if (ifmgd->associated && 4049 ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) { 4050 sdata_info(sdata, "deauthenticated from %pM (Reason: %u=%s)\n", 4051 sdata->vif.cfg.ap_addr, reason_code, 4052 ieee80211_get_reason_code_string(reason_code)); 4053 4054 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4055 4056 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, 4057 reason_code, false); 4058 return; 4059 } 4060 4061 if (ifmgd->assoc_data && 4062 ether_addr_equal(mgmt->bssid, ifmgd->assoc_data->ap_addr)) { 4063 sdata_info(sdata, 4064 "deauthenticated from %pM while associating (Reason: %u=%s)\n", 4065 ifmgd->assoc_data->ap_addr, reason_code, 4066 ieee80211_get_reason_code_string(reason_code)); 4067 4068 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 4069 4070 cfg80211_rx_mlme_mgmt(sdata->dev, (u8 *)mgmt, len); 4071 return; 4072 } 4073 } 4074 4075 4076 static void ieee80211_rx_mgmt_disassoc(struct ieee80211_sub_if_data *sdata, 4077 struct ieee80211_mgmt *mgmt, size_t len) 4078 { 4079 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 4080 u16 reason_code; 4081 4082 lockdep_assert_wiphy(sdata->local->hw.wiphy); 4083 4084 if (len < 24 + 2) 4085 return; 4086 4087 if (!ifmgd->associated || 4088 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 4089 return; 4090 4091 reason_code = le16_to_cpu(mgmt->u.disassoc.reason_code); 4092 4093 if (!ether_addr_equal(mgmt->bssid, mgmt->sa)) { 4094 ieee80211_tdls_handle_disconnect(sdata, mgmt->sa, reason_code); 4095 return; 4096 } 4097 4098 sdata_info(sdata, "disassociated from %pM (Reason: %u=%s)\n", 4099 sdata->vif.cfg.ap_addr, reason_code, 4100 ieee80211_get_reason_code_string(reason_code)); 4101 4102 ieee80211_set_disassoc(sdata, 0, 0, false, NULL); 4103 4104 ieee80211_report_disconnect(sdata, (u8 *)mgmt, len, false, reason_code, 4105 false); 4106 } 4107 4108 static void ieee80211_get_rates(struct ieee80211_supported_band *sband, 4109 u8 *supp_rates, unsigned int supp_rates_len, 4110 u32 *rates, u32 *basic_rates, 4111 bool *have_higher_than_11mbit, 4112 int *min_rate, int *min_rate_index) 4113 { 4114 int i, j; 4115 4116 for (i = 0; i < supp_rates_len; i++) { 4117 int rate = supp_rates[i] & 0x7f; 4118 bool is_basic = !!(supp_rates[i] & 0x80); 4119 4120 if ((rate * 5) > 110) 4121 *have_higher_than_11mbit = true; 4122 4123 /* 4124 * Skip HT, VHT, HE, EHT and SAE H2E only BSS membership 4125 * selectors since they're not rates. 4126 * 4127 * Note: Even though the membership selector and the basic 4128 * rate flag share the same bit, they are not exactly 4129 * the same. 4130 */ 4131 if (supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HT_PHY) || 4132 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_VHT_PHY) || 4133 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_HE_PHY) || 4134 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_EHT_PHY) || 4135 supp_rates[i] == (0x80 | BSS_MEMBERSHIP_SELECTOR_SAE_H2E)) 4136 continue; 4137 4138 for (j = 0; j < sband->n_bitrates; j++) { 4139 struct ieee80211_rate *br; 4140 int brate; 4141 4142 br = &sband->bitrates[j]; 4143 4144 brate = DIV_ROUND_UP(br->bitrate, 5); 4145 if (brate == rate) { 4146 *rates |= BIT(j); 4147 if (is_basic) 4148 *basic_rates |= BIT(j); 4149 if ((rate * 5) < *min_rate) { 4150 *min_rate = rate * 5; 4151 *min_rate_index = j; 4152 } 4153 break; 4154 } 4155 } 4156 } 4157 } 4158 4159 static bool ieee80211_twt_req_supported(struct ieee80211_sub_if_data *sdata, 4160 struct ieee80211_supported_band *sband, 4161 const struct link_sta_info *link_sta, 4162 const struct ieee802_11_elems *elems) 4163 { 4164 const struct ieee80211_sta_he_cap *own_he_cap = 4165 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4166 4167 if (elems->ext_capab_len < 10) 4168 return false; 4169 4170 if (!(elems->ext_capab[9] & WLAN_EXT_CAPA10_TWT_RESPONDER_SUPPORT)) 4171 return false; 4172 4173 return link_sta->pub->he_cap.he_cap_elem.mac_cap_info[0] & 4174 IEEE80211_HE_MAC_CAP0_TWT_RES && 4175 own_he_cap && 4176 (own_he_cap->he_cap_elem.mac_cap_info[0] & 4177 IEEE80211_HE_MAC_CAP0_TWT_REQ); 4178 } 4179 4180 static u64 ieee80211_recalc_twt_req(struct ieee80211_sub_if_data *sdata, 4181 struct ieee80211_supported_band *sband, 4182 struct ieee80211_link_data *link, 4183 struct link_sta_info *link_sta, 4184 struct ieee802_11_elems *elems) 4185 { 4186 bool twt = ieee80211_twt_req_supported(sdata, sband, link_sta, elems); 4187 4188 if (link->conf->twt_requester != twt) { 4189 link->conf->twt_requester = twt; 4190 return BSS_CHANGED_TWT; 4191 } 4192 return 0; 4193 } 4194 4195 static bool ieee80211_twt_bcast_support(struct ieee80211_sub_if_data *sdata, 4196 struct ieee80211_bss_conf *bss_conf, 4197 struct ieee80211_supported_band *sband, 4198 struct link_sta_info *link_sta) 4199 { 4200 const struct ieee80211_sta_he_cap *own_he_cap = 4201 ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4202 4203 return bss_conf->he_support && 4204 (link_sta->pub->he_cap.he_cap_elem.mac_cap_info[2] & 4205 IEEE80211_HE_MAC_CAP2_BCAST_TWT) && 4206 own_he_cap && 4207 (own_he_cap->he_cap_elem.mac_cap_info[2] & 4208 IEEE80211_HE_MAC_CAP2_BCAST_TWT); 4209 } 4210 4211 static bool ieee80211_assoc_config_link(struct ieee80211_link_data *link, 4212 struct link_sta_info *link_sta, 4213 struct cfg80211_bss *cbss, 4214 struct ieee80211_mgmt *mgmt, 4215 const u8 *elem_start, 4216 unsigned int elem_len, 4217 u64 *changed) 4218 { 4219 struct ieee80211_sub_if_data *sdata = link->sdata; 4220 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 4221 struct ieee80211_bss_conf *bss_conf = link->conf; 4222 struct ieee80211_local *local = sdata->local; 4223 unsigned int link_id = link->link_id; 4224 struct ieee80211_elems_parse_params parse_params = { 4225 .mode = link->u.mgd.conn.mode, 4226 .start = elem_start, 4227 .len = elem_len, 4228 .link_id = link_id == assoc_data->assoc_link_id ? -1 : link_id, 4229 .from_ap = true, 4230 }; 4231 bool is_5ghz = cbss->channel->band == NL80211_BAND_5GHZ; 4232 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 4233 bool is_s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 4234 const struct cfg80211_bss_ies *bss_ies = NULL; 4235 struct ieee80211_supported_band *sband; 4236 struct ieee802_11_elems *elems; 4237 const __le16 prof_bss_param_ch_present = 4238 cpu_to_le16(IEEE80211_MLE_STA_CONTROL_BSS_PARAM_CHANGE_CNT_PRESENT); 4239 u16 capab_info; 4240 bool ret; 4241 4242 elems = ieee802_11_parse_elems_full(&parse_params); 4243 if (!elems) 4244 return false; 4245 4246 if (link_id == assoc_data->assoc_link_id) { 4247 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 4248 4249 /* 4250 * we should not get to this flow unless the association was 4251 * successful, so set the status directly to success 4252 */ 4253 assoc_data->link[link_id].status = WLAN_STATUS_SUCCESS; 4254 if (elems->ml_basic) { 4255 int bss_param_ch_cnt = 4256 ieee80211_mle_get_bss_param_ch_cnt((const void *)elems->ml_basic); 4257 4258 if (bss_param_ch_cnt < 0) { 4259 ret = false; 4260 goto out; 4261 } 4262 link->u.mgd.bss_param_ch_cnt = bss_param_ch_cnt; 4263 } 4264 } else if (elems->parse_error & IEEE80211_PARSE_ERR_DUP_NEST_ML_BASIC || 4265 !elems->prof || 4266 !(elems->prof->control & prof_bss_param_ch_present)) { 4267 ret = false; 4268 goto out; 4269 } else { 4270 const u8 *ptr = elems->prof->variable + 4271 elems->prof->sta_info_len - 1; 4272 4273 /* 4274 * During parsing, we validated that these fields exist, 4275 * otherwise elems->prof would have been set to NULL. 4276 */ 4277 capab_info = get_unaligned_le16(ptr); 4278 assoc_data->link[link_id].status = get_unaligned_le16(ptr + 2); 4279 link->u.mgd.bss_param_ch_cnt = 4280 ieee80211_mle_basic_sta_prof_bss_param_ch_cnt(elems->prof); 4281 4282 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 4283 link_info(link, "association response status code=%u\n", 4284 assoc_data->link[link_id].status); 4285 ret = true; 4286 goto out; 4287 } 4288 } 4289 4290 if (!is_s1g && !elems->supp_rates) { 4291 sdata_info(sdata, "no SuppRates element in AssocResp\n"); 4292 ret = false; 4293 goto out; 4294 } 4295 4296 link->u.mgd.tdls_chan_switch_prohibited = 4297 elems->ext_capab && elems->ext_capab_len >= 5 && 4298 (elems->ext_capab[4] & WLAN_EXT_CAPA5_TDLS_CH_SW_PROHIBITED); 4299 4300 /* 4301 * Some APs are erroneously not including some information in their 4302 * (re)association response frames. Try to recover by using the data 4303 * from the beacon or probe response. This seems to afflict mobile 4304 * 2G/3G/4G wifi routers, reported models include the "Onda PN51T", 4305 * "Vodafone PocketWiFi 2", "ZTE MF60" and a similar T-Mobile device. 4306 */ 4307 if (!is_6ghz && 4308 ((assoc_data->wmm && !elems->wmm_param) || 4309 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4310 (!elems->ht_cap_elem || !elems->ht_operation)) || 4311 (link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4312 (!elems->vht_cap_elem || !elems->vht_operation)))) { 4313 const struct cfg80211_bss_ies *ies; 4314 struct ieee802_11_elems *bss_elems; 4315 4316 rcu_read_lock(); 4317 ies = rcu_dereference(cbss->ies); 4318 if (ies) 4319 bss_ies = kmemdup(ies, sizeof(*ies) + ies->len, 4320 GFP_ATOMIC); 4321 rcu_read_unlock(); 4322 if (!bss_ies) { 4323 ret = false; 4324 goto out; 4325 } 4326 4327 parse_params.start = bss_ies->data; 4328 parse_params.len = bss_ies->len; 4329 parse_params.bss = cbss; 4330 bss_elems = ieee802_11_parse_elems_full(&parse_params); 4331 if (!bss_elems) { 4332 ret = false; 4333 goto out; 4334 } 4335 4336 if (assoc_data->wmm && 4337 !elems->wmm_param && bss_elems->wmm_param) { 4338 elems->wmm_param = bss_elems->wmm_param; 4339 sdata_info(sdata, 4340 "AP bug: WMM param missing from AssocResp\n"); 4341 } 4342 4343 /* 4344 * Also check if we requested HT/VHT, otherwise the AP doesn't 4345 * have to include the IEs in the (re)association response. 4346 */ 4347 if (!elems->ht_cap_elem && bss_elems->ht_cap_elem && 4348 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4349 elems->ht_cap_elem = bss_elems->ht_cap_elem; 4350 sdata_info(sdata, 4351 "AP bug: HT capability missing from AssocResp\n"); 4352 } 4353 if (!elems->ht_operation && bss_elems->ht_operation && 4354 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) { 4355 elems->ht_operation = bss_elems->ht_operation; 4356 sdata_info(sdata, 4357 "AP bug: HT operation missing from AssocResp\n"); 4358 } 4359 if (!elems->vht_cap_elem && bss_elems->vht_cap_elem && 4360 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4361 elems->vht_cap_elem = bss_elems->vht_cap_elem; 4362 sdata_info(sdata, 4363 "AP bug: VHT capa missing from AssocResp\n"); 4364 } 4365 if (!elems->vht_operation && bss_elems->vht_operation && 4366 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4367 elems->vht_operation = bss_elems->vht_operation; 4368 sdata_info(sdata, 4369 "AP bug: VHT operation missing from AssocResp\n"); 4370 } 4371 4372 kfree(bss_elems); 4373 } 4374 4375 /* 4376 * We previously checked these in the beacon/probe response, so 4377 * they should be present here. This is just a safety net. 4378 * Note that the ieee80211_config_bw() below would also check 4379 * for this (and more), but this has better error reporting. 4380 */ 4381 if (!is_6ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT && 4382 (!elems->wmm_param || !elems->ht_cap_elem || !elems->ht_operation)) { 4383 sdata_info(sdata, 4384 "HT AP is missing WMM params or HT capability/operation\n"); 4385 ret = false; 4386 goto out; 4387 } 4388 4389 if (is_5ghz && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT && 4390 (!elems->vht_cap_elem || !elems->vht_operation)) { 4391 sdata_info(sdata, 4392 "VHT AP is missing VHT capability/operation\n"); 4393 ret = false; 4394 goto out; 4395 } 4396 4397 /* check/update if AP changed anything in assoc response vs. scan */ 4398 if (ieee80211_config_bw(link, elems, 4399 link_id == assoc_data->assoc_link_id, 4400 changed)) { 4401 ret = false; 4402 goto out; 4403 } 4404 4405 if (WARN_ON(!link->conf->chanreq.oper.chan)) { 4406 ret = false; 4407 goto out; 4408 } 4409 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 4410 4411 /* Set up internal HT/VHT capabilities */ 4412 if (elems->ht_cap_elem && link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HT) 4413 ieee80211_ht_cap_ie_to_sta_ht_cap(sdata, sband, 4414 elems->ht_cap_elem, 4415 link_sta); 4416 4417 if (elems->vht_cap_elem && 4418 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_VHT) { 4419 const struct ieee80211_vht_cap *bss_vht_cap = NULL; 4420 const struct cfg80211_bss_ies *ies; 4421 4422 /* 4423 * Cisco AP module 9115 with FW 17.3 has a bug and sends a 4424 * too large maximum MPDU length in the association response 4425 * (indicating 12k) that it cannot actually process ... 4426 * Work around that. 4427 */ 4428 rcu_read_lock(); 4429 ies = rcu_dereference(cbss->ies); 4430 if (ies) { 4431 const struct element *elem; 4432 4433 elem = cfg80211_find_elem(WLAN_EID_VHT_CAPABILITY, 4434 ies->data, ies->len); 4435 if (elem && elem->datalen >= sizeof(*bss_vht_cap)) 4436 bss_vht_cap = (const void *)elem->data; 4437 } 4438 4439 ieee80211_vht_cap_ie_to_sta_vht_cap(sdata, sband, 4440 elems->vht_cap_elem, 4441 bss_vht_cap, link_sta); 4442 rcu_read_unlock(); 4443 } 4444 4445 if (elems->he_operation && 4446 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_HE && 4447 elems->he_cap) { 4448 const struct ieee80211_he_6ghz_oper *he_6ghz_oper; 4449 4450 ieee80211_he_cap_ie_to_sta_he_cap(sdata, sband, 4451 elems->he_cap, 4452 elems->he_cap_len, 4453 elems->he_6ghz_capa, 4454 link_sta); 4455 4456 he_6ghz_oper = ieee80211_he_6ghz_oper(elems->he_operation); 4457 4458 if (is_6ghz && he_6ghz_oper) { 4459 switch (u8_get_bits(he_6ghz_oper->control, 4460 IEEE80211_HE_6GHZ_OPER_CTRL_REG_INFO)) { 4461 case IEEE80211_6GHZ_CTRL_REG_LPI_AP: 4462 case IEEE80211_6GHZ_CTRL_REG_INDOOR_LPI_AP: 4463 bss_conf->power_type = IEEE80211_REG_LPI_AP; 4464 break; 4465 case IEEE80211_6GHZ_CTRL_REG_SP_AP: 4466 case IEEE80211_6GHZ_CTRL_REG_INDOOR_SP_AP: 4467 bss_conf->power_type = IEEE80211_REG_SP_AP; 4468 break; 4469 case IEEE80211_6GHZ_CTRL_REG_VLP_AP: 4470 bss_conf->power_type = IEEE80211_REG_VLP_AP; 4471 break; 4472 default: 4473 bss_conf->power_type = IEEE80211_REG_UNSET_AP; 4474 break; 4475 } 4476 } else if (is_6ghz) { 4477 link_info(link, 4478 "HE 6 GHz operation missing (on %d MHz), expect issues\n", 4479 bss_conf->chanreq.oper.chan->center_freq); 4480 } 4481 4482 bss_conf->he_support = link_sta->pub->he_cap.has_he; 4483 if (elems->rsnx && elems->rsnx_len && 4484 (elems->rsnx[0] & WLAN_RSNX_CAPA_PROTECTED_TWT) && 4485 wiphy_ext_feature_isset(local->hw.wiphy, 4486 NL80211_EXT_FEATURE_PROTECTED_TWT)) 4487 bss_conf->twt_protected = true; 4488 else 4489 bss_conf->twt_protected = false; 4490 4491 *changed |= ieee80211_recalc_twt_req(sdata, sband, link, 4492 link_sta, elems); 4493 4494 if (elems->eht_operation && elems->eht_cap && 4495 link->u.mgd.conn.mode >= IEEE80211_CONN_MODE_EHT) { 4496 ieee80211_eht_cap_ie_to_sta_eht_cap(sdata, sband, 4497 elems->he_cap, 4498 elems->he_cap_len, 4499 elems->eht_cap, 4500 elems->eht_cap_len, 4501 link_sta); 4502 4503 bss_conf->eht_support = link_sta->pub->eht_cap.has_eht; 4504 } else { 4505 bss_conf->eht_support = false; 4506 } 4507 } else { 4508 bss_conf->he_support = false; 4509 bss_conf->twt_requester = false; 4510 bss_conf->twt_protected = false; 4511 bss_conf->eht_support = false; 4512 } 4513 4514 bss_conf->twt_broadcast = 4515 ieee80211_twt_bcast_support(sdata, bss_conf, sband, link_sta); 4516 4517 if (bss_conf->he_support) { 4518 bss_conf->he_bss_color.color = 4519 le32_get_bits(elems->he_operation->he_oper_params, 4520 IEEE80211_HE_OPERATION_BSS_COLOR_MASK); 4521 bss_conf->he_bss_color.partial = 4522 le32_get_bits(elems->he_operation->he_oper_params, 4523 IEEE80211_HE_OPERATION_PARTIAL_BSS_COLOR); 4524 bss_conf->he_bss_color.enabled = 4525 !le32_get_bits(elems->he_operation->he_oper_params, 4526 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED); 4527 4528 if (bss_conf->he_bss_color.enabled) 4529 *changed |= BSS_CHANGED_HE_BSS_COLOR; 4530 4531 bss_conf->htc_trig_based_pkt_ext = 4532 le32_get_bits(elems->he_operation->he_oper_params, 4533 IEEE80211_HE_OPERATION_DFLT_PE_DURATION_MASK); 4534 bss_conf->frame_time_rts_th = 4535 le32_get_bits(elems->he_operation->he_oper_params, 4536 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK); 4537 4538 bss_conf->uora_exists = !!elems->uora_element; 4539 if (elems->uora_element) 4540 bss_conf->uora_ocw_range = elems->uora_element[0]; 4541 4542 ieee80211_he_op_ie_to_bss_conf(&sdata->vif, elems->he_operation); 4543 ieee80211_he_spr_ie_to_bss_conf(&sdata->vif, elems->he_spr); 4544 /* TODO: OPEN: what happens if BSS color disable is set? */ 4545 } 4546 4547 if (cbss->transmitted_bss) { 4548 bss_conf->nontransmitted = true; 4549 ether_addr_copy(bss_conf->transmitter_bssid, 4550 cbss->transmitted_bss->bssid); 4551 bss_conf->bssid_indicator = cbss->max_bssid_indicator; 4552 bss_conf->bssid_index = cbss->bssid_index; 4553 } 4554 4555 /* 4556 * Some APs, e.g. Netgear WNDR3700, report invalid HT operation data 4557 * in their association response, so ignore that data for our own 4558 * configuration. If it changed since the last beacon, we'll get the 4559 * next beacon and update then. 4560 */ 4561 4562 /* 4563 * If an operating mode notification IE is present, override the 4564 * NSS calculation (that would be done in rate_control_rate_init()) 4565 * and use the # of streams from that element. 4566 */ 4567 if (elems->opmode_notif && 4568 !(*elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_TYPE_BF)) { 4569 u8 nss; 4570 4571 nss = *elems->opmode_notif & IEEE80211_OPMODE_NOTIF_RX_NSS_MASK; 4572 nss >>= IEEE80211_OPMODE_NOTIF_RX_NSS_SHIFT; 4573 nss += 1; 4574 link_sta->pub->rx_nss = nss; 4575 } 4576 4577 /* 4578 * Always handle WMM once after association regardless 4579 * of the first value the AP uses. Setting -1 here has 4580 * that effect because the AP values is an unsigned 4581 * 4-bit value. 4582 */ 4583 link->u.mgd.wmm_last_param_set = -1; 4584 link->u.mgd.mu_edca_last_param_set = -1; 4585 4586 if (link->u.mgd.disable_wmm_tracking) { 4587 ieee80211_set_wmm_default(link, false, false); 4588 } else if (!ieee80211_sta_wmm_params(local, link, elems->wmm_param, 4589 elems->wmm_param_len, 4590 elems->mu_edca_param_set)) { 4591 /* still enable QoS since we might have HT/VHT */ 4592 ieee80211_set_wmm_default(link, false, true); 4593 /* disable WMM tracking in this case to disable 4594 * tracking WMM parameter changes in the beacon if 4595 * the parameters weren't actually valid. Doing so 4596 * avoids changing parameters very strangely when 4597 * the AP is going back and forth between valid and 4598 * invalid parameters. 4599 */ 4600 link->u.mgd.disable_wmm_tracking = true; 4601 } 4602 4603 if (elems->max_idle_period_ie) { 4604 bss_conf->max_idle_period = 4605 le16_to_cpu(elems->max_idle_period_ie->max_idle_period); 4606 bss_conf->protected_keep_alive = 4607 !!(elems->max_idle_period_ie->idle_options & 4608 WLAN_IDLE_OPTIONS_PROTECTED_KEEP_ALIVE); 4609 *changed |= BSS_CHANGED_KEEP_ALIVE; 4610 } else { 4611 bss_conf->max_idle_period = 0; 4612 bss_conf->protected_keep_alive = false; 4613 } 4614 4615 /* set assoc capability (AID was already set earlier), 4616 * ieee80211_set_associated() will tell the driver */ 4617 bss_conf->assoc_capability = capab_info; 4618 4619 ret = true; 4620 out: 4621 kfree(elems); 4622 kfree(bss_ies); 4623 return ret; 4624 } 4625 4626 static int ieee80211_mgd_setup_link_sta(struct ieee80211_link_data *link, 4627 struct sta_info *sta, 4628 struct link_sta_info *link_sta, 4629 struct cfg80211_bss *cbss) 4630 { 4631 struct ieee80211_sub_if_data *sdata = link->sdata; 4632 struct ieee80211_local *local = sdata->local; 4633 struct ieee80211_bss *bss = (void *)cbss->priv; 4634 u32 rates = 0, basic_rates = 0; 4635 bool have_higher_than_11mbit = false; 4636 int min_rate = INT_MAX, min_rate_index = -1; 4637 struct ieee80211_supported_band *sband; 4638 4639 memcpy(link_sta->addr, cbss->bssid, ETH_ALEN); 4640 memcpy(link_sta->pub->addr, cbss->bssid, ETH_ALEN); 4641 4642 /* TODO: S1G Basic Rate Set is expressed elsewhere */ 4643 if (cbss->channel->band == NL80211_BAND_S1GHZ) { 4644 ieee80211_s1g_sta_rate_init(sta); 4645 return 0; 4646 } 4647 4648 sband = local->hw.wiphy->bands[cbss->channel->band]; 4649 4650 ieee80211_get_rates(sband, bss->supp_rates, bss->supp_rates_len, 4651 &rates, &basic_rates, &have_higher_than_11mbit, 4652 &min_rate, &min_rate_index); 4653 4654 /* 4655 * This used to be a workaround for basic rates missing 4656 * in the association response frame. Now that we no 4657 * longer use the basic rates from there, it probably 4658 * doesn't happen any more, but keep the workaround so 4659 * in case some *other* APs are buggy in different ways 4660 * we can connect -- with a warning. 4661 * Allow this workaround only in case the AP provided at least 4662 * one rate. 4663 */ 4664 if (min_rate_index < 0) { 4665 link_info(link, "No legacy rates in association response\n"); 4666 return -EINVAL; 4667 } else if (!basic_rates) { 4668 link_info(link, "No basic rates, using min rate instead\n"); 4669 basic_rates = BIT(min_rate_index); 4670 } 4671 4672 if (rates) 4673 link_sta->pub->supp_rates[cbss->channel->band] = rates; 4674 else 4675 link_info(link, "No rates found, keeping mandatory only\n"); 4676 4677 link->conf->basic_rates = basic_rates; 4678 4679 /* cf. IEEE 802.11 9.2.12 */ 4680 link->operating_11g_mode = sband->band == NL80211_BAND_2GHZ && 4681 have_higher_than_11mbit; 4682 4683 return 0; 4684 } 4685 4686 static u8 ieee80211_max_rx_chains(struct ieee80211_link_data *link, 4687 struct cfg80211_bss *cbss) 4688 { 4689 struct ieee80211_he_mcs_nss_supp *he_mcs_nss_supp; 4690 const struct element *ht_cap_elem, *vht_cap_elem; 4691 const struct cfg80211_bss_ies *ies; 4692 const struct ieee80211_ht_cap *ht_cap; 4693 const struct ieee80211_vht_cap *vht_cap; 4694 const struct ieee80211_he_cap_elem *he_cap; 4695 const struct element *he_cap_elem; 4696 u16 mcs_80_map, mcs_160_map; 4697 int i, mcs_nss_size; 4698 bool support_160; 4699 u8 chains = 1; 4700 4701 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HT) 4702 return chains; 4703 4704 ht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_CAPABILITY); 4705 if (ht_cap_elem && ht_cap_elem->datalen >= sizeof(*ht_cap)) { 4706 ht_cap = (void *)ht_cap_elem->data; 4707 chains = ieee80211_mcs_to_chains(&ht_cap->mcs); 4708 /* 4709 * TODO: use "Tx Maximum Number Spatial Streams Supported" and 4710 * "Tx Unequal Modulation Supported" fields. 4711 */ 4712 } 4713 4714 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_VHT) 4715 return chains; 4716 4717 vht_cap_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 4718 if (vht_cap_elem && vht_cap_elem->datalen >= sizeof(*vht_cap)) { 4719 u8 nss; 4720 u16 tx_mcs_map; 4721 4722 vht_cap = (void *)vht_cap_elem->data; 4723 tx_mcs_map = le16_to_cpu(vht_cap->supp_mcs.tx_mcs_map); 4724 for (nss = 8; nss > 0; nss--) { 4725 if (((tx_mcs_map >> (2 * (nss - 1))) & 3) != 4726 IEEE80211_VHT_MCS_NOT_SUPPORTED) 4727 break; 4728 } 4729 /* TODO: use "Tx Highest Supported Long GI Data Rate" field? */ 4730 chains = max(chains, nss); 4731 } 4732 4733 if (link->u.mgd.conn.mode < IEEE80211_CONN_MODE_HE) 4734 return chains; 4735 4736 ies = rcu_dereference(cbss->ies); 4737 he_cap_elem = cfg80211_find_ext_elem(WLAN_EID_EXT_HE_CAPABILITY, 4738 ies->data, ies->len); 4739 4740 if (!he_cap_elem || he_cap_elem->datalen < sizeof(*he_cap)) 4741 return chains; 4742 4743 /* skip one byte ext_tag_id */ 4744 he_cap = (void *)(he_cap_elem->data + 1); 4745 mcs_nss_size = ieee80211_he_mcs_nss_size(he_cap); 4746 4747 /* invalid HE IE */ 4748 if (he_cap_elem->datalen < 1 + mcs_nss_size + sizeof(*he_cap)) 4749 return chains; 4750 4751 /* mcs_nss is right after he_cap info */ 4752 he_mcs_nss_supp = (void *)(he_cap + 1); 4753 4754 mcs_80_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_80); 4755 4756 for (i = 7; i >= 0; i--) { 4757 u8 mcs_80 = mcs_80_map >> (2 * i) & 3; 4758 4759 if (mcs_80 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4760 chains = max_t(u8, chains, i + 1); 4761 break; 4762 } 4763 } 4764 4765 support_160 = he_cap->phy_cap_info[0] & 4766 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G; 4767 4768 if (!support_160) 4769 return chains; 4770 4771 mcs_160_map = le16_to_cpu(he_mcs_nss_supp->tx_mcs_160); 4772 for (i = 7; i >= 0; i--) { 4773 u8 mcs_160 = mcs_160_map >> (2 * i) & 3; 4774 4775 if (mcs_160 != IEEE80211_VHT_MCS_NOT_SUPPORTED) { 4776 chains = max_t(u8, chains, i + 1); 4777 break; 4778 } 4779 } 4780 4781 return chains; 4782 } 4783 4784 static void 4785 ieee80211_determine_our_sta_mode(struct ieee80211_sub_if_data *sdata, 4786 struct ieee80211_supported_band *sband, 4787 struct cfg80211_assoc_request *req, 4788 bool wmm_used, int link_id, 4789 struct ieee80211_conn_settings *conn) 4790 { 4791 struct ieee80211_sta_ht_cap sta_ht_cap = sband->ht_cap; 4792 bool is_5ghz = sband->band == NL80211_BAND_5GHZ; 4793 bool is_6ghz = sband->band == NL80211_BAND_6GHZ; 4794 const struct ieee80211_sta_he_cap *he_cap; 4795 const struct ieee80211_sta_eht_cap *eht_cap; 4796 struct ieee80211_sta_vht_cap vht_cap; 4797 4798 if (sband->band == NL80211_BAND_S1GHZ) { 4799 conn->mode = IEEE80211_CONN_MODE_S1G; 4800 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4801 mlme_dbg(sdata, "operating as S1G STA\n"); 4802 return; 4803 } 4804 4805 conn->mode = IEEE80211_CONN_MODE_LEGACY; 4806 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4807 4808 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 4809 4810 if (req && req->flags & ASSOC_REQ_DISABLE_HT) { 4811 mlme_link_id_dbg(sdata, link_id, 4812 "HT disabled by flag, limiting to legacy\n"); 4813 goto out; 4814 } 4815 4816 if (!wmm_used) { 4817 mlme_link_id_dbg(sdata, link_id, 4818 "WMM/QoS not supported, limiting to legacy\n"); 4819 goto out; 4820 } 4821 4822 if (req) { 4823 unsigned int i; 4824 4825 for (i = 0; i < req->crypto.n_ciphers_pairwise; i++) { 4826 if (req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP40 || 4827 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_TKIP || 4828 req->crypto.ciphers_pairwise[i] == WLAN_CIPHER_SUITE_WEP104) { 4829 netdev_info(sdata->dev, 4830 "WEP/TKIP use, limiting to legacy\n"); 4831 goto out; 4832 } 4833 } 4834 } 4835 4836 if (!sta_ht_cap.ht_supported && !is_6ghz) { 4837 mlme_link_id_dbg(sdata, link_id, 4838 "HT not supported (and not on 6 GHz), limiting to legacy\n"); 4839 goto out; 4840 } 4841 4842 /* HT is fine */ 4843 conn->mode = IEEE80211_CONN_MODE_HT; 4844 conn->bw_limit = sta_ht_cap.cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 ? 4845 IEEE80211_CONN_BW_LIMIT_40 : 4846 IEEE80211_CONN_BW_LIMIT_20; 4847 4848 memcpy(&vht_cap, &sband->vht_cap, sizeof(vht_cap)); 4849 ieee80211_apply_vhtcap_overrides(sdata, &vht_cap); 4850 4851 if (req && req->flags & ASSOC_REQ_DISABLE_VHT) { 4852 mlme_link_id_dbg(sdata, link_id, 4853 "VHT disabled by flag, limiting to HT\n"); 4854 goto out; 4855 } 4856 4857 if (vht_cap.vht_supported && is_5ghz) { 4858 bool have_80mhz = false; 4859 unsigned int i; 4860 4861 if (conn->bw_limit == IEEE80211_CONN_BW_LIMIT_20) { 4862 mlme_link_id_dbg(sdata, link_id, 4863 "no 40 MHz support on 5 GHz, limiting to HT\n"); 4864 goto out; 4865 } 4866 4867 /* Allow VHT if at least one channel on the sband supports 80 MHz */ 4868 for (i = 0; i < sband->n_channels; i++) { 4869 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED | 4870 IEEE80211_CHAN_NO_80MHZ)) 4871 continue; 4872 4873 have_80mhz = true; 4874 break; 4875 } 4876 4877 if (!have_80mhz) { 4878 mlme_link_id_dbg(sdata, link_id, 4879 "no 80 MHz channel support on 5 GHz, limiting to HT\n"); 4880 goto out; 4881 } 4882 } else if (is_5ghz) { /* !vht_supported but on 5 GHz */ 4883 mlme_link_id_dbg(sdata, link_id, 4884 "no VHT support on 5 GHz, limiting to HT\n"); 4885 goto out; 4886 } 4887 4888 /* VHT - if we have - is fine, including 80 MHz, check 160 below again */ 4889 if (sband->band != NL80211_BAND_2GHZ) { 4890 conn->mode = IEEE80211_CONN_MODE_VHT; 4891 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_160; 4892 } 4893 4894 if (is_5ghz && 4895 !(vht_cap.cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ | 4896 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ))) { 4897 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_80; 4898 mlme_link_id_dbg(sdata, link_id, 4899 "no VHT 160 MHz capability on 5 GHz, limiting to 80 MHz"); 4900 } 4901 4902 if (req && req->flags & ASSOC_REQ_DISABLE_HE) { 4903 mlme_link_id_dbg(sdata, link_id, 4904 "HE disabled by flag, limiting to HT/VHT\n"); 4905 goto out; 4906 } 4907 4908 he_cap = ieee80211_get_he_iftype_cap_vif(sband, &sdata->vif); 4909 if (!he_cap) { 4910 WARN_ON(is_6ghz); 4911 mlme_link_id_dbg(sdata, link_id, 4912 "no HE support, limiting to HT/VHT\n"); 4913 goto out; 4914 } 4915 4916 /* so we have HE */ 4917 conn->mode = IEEE80211_CONN_MODE_HE; 4918 4919 /* check bandwidth */ 4920 switch (sband->band) { 4921 default: 4922 case NL80211_BAND_2GHZ: 4923 if (he_cap->he_cap_elem.phy_cap_info[0] & 4924 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_IN_2G) 4925 break; 4926 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4927 mlme_link_id_dbg(sdata, link_id, 4928 "no 40 MHz HE cap in 2.4 GHz, limiting to 20 MHz\n"); 4929 break; 4930 case NL80211_BAND_5GHZ: 4931 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 4932 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_40MHZ_80MHZ_IN_5G)) { 4933 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_20; 4934 mlme_link_id_dbg(sdata, link_id, 4935 "no 40/80 MHz HE cap in 5 GHz, limiting to 20 MHz\n"); 4936 break; 4937 } 4938 if (!(he_cap->he_cap_elem.phy_cap_info[0] & 4939 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G)) { 4940 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 4941 conn->bw_limit, 4942 IEEE80211_CONN_BW_LIMIT_80); 4943 mlme_link_id_dbg(sdata, link_id, 4944 "no 160 MHz HE cap in 5 GHz, limiting to 80 MHz\n"); 4945 } 4946 break; 4947 case NL80211_BAND_6GHZ: 4948 if (he_cap->he_cap_elem.phy_cap_info[0] & 4949 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G) 4950 break; 4951 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 4952 conn->bw_limit, 4953 IEEE80211_CONN_BW_LIMIT_80); 4954 mlme_link_id_dbg(sdata, link_id, 4955 "no 160 MHz HE cap in 6 GHz, limiting to 80 MHz\n"); 4956 break; 4957 } 4958 4959 if (req && req->flags & ASSOC_REQ_DISABLE_EHT) { 4960 mlme_link_id_dbg(sdata, link_id, 4961 "EHT disabled by flag, limiting to HE\n"); 4962 goto out; 4963 } 4964 4965 eht_cap = ieee80211_get_eht_iftype_cap_vif(sband, &sdata->vif); 4966 if (!eht_cap) { 4967 mlme_link_id_dbg(sdata, link_id, 4968 "no EHT support, limiting to HE\n"); 4969 goto out; 4970 } 4971 4972 /* we have EHT */ 4973 4974 conn->mode = IEEE80211_CONN_MODE_EHT; 4975 4976 /* check bandwidth */ 4977 if (is_6ghz && 4978 eht_cap->eht_cap_elem.phy_cap_info[0] & IEEE80211_EHT_PHY_CAP0_320MHZ_IN_6GHZ) 4979 conn->bw_limit = IEEE80211_CONN_BW_LIMIT_320; 4980 else if (is_6ghz) 4981 mlme_link_id_dbg(sdata, link_id, 4982 "no EHT 320 MHz cap in 6 GHz, limiting to 160 MHz\n"); 4983 4984 out: 4985 mlme_link_id_dbg(sdata, link_id, 4986 "determined local STA to be %s, BW limited to %d MHz\n", 4987 ieee80211_conn_mode_str(conn->mode), 4988 20 * (1 << conn->bw_limit)); 4989 } 4990 4991 static void 4992 ieee80211_determine_our_sta_mode_auth(struct ieee80211_sub_if_data *sdata, 4993 struct ieee80211_supported_band *sband, 4994 struct cfg80211_auth_request *req, 4995 bool wmm_used, 4996 struct ieee80211_conn_settings *conn) 4997 { 4998 ieee80211_determine_our_sta_mode(sdata, sband, NULL, wmm_used, 4999 req->link_id > 0 ? req->link_id : 0, 5000 conn); 5001 } 5002 5003 static void 5004 ieee80211_determine_our_sta_mode_assoc(struct ieee80211_sub_if_data *sdata, 5005 struct ieee80211_supported_band *sband, 5006 struct cfg80211_assoc_request *req, 5007 bool wmm_used, int link_id, 5008 struct ieee80211_conn_settings *conn) 5009 { 5010 struct ieee80211_conn_settings tmp; 5011 5012 WARN_ON(!req); 5013 5014 ieee80211_determine_our_sta_mode(sdata, sband, req, wmm_used, link_id, 5015 &tmp); 5016 5017 conn->mode = min_t(enum ieee80211_conn_mode, 5018 conn->mode, tmp.mode); 5019 conn->bw_limit = min_t(enum ieee80211_conn_bw_limit, 5020 conn->bw_limit, tmp.bw_limit); 5021 } 5022 5023 static int ieee80211_prep_channel(struct ieee80211_sub_if_data *sdata, 5024 struct ieee80211_link_data *link, 5025 int link_id, 5026 struct cfg80211_bss *cbss, bool mlo, 5027 struct ieee80211_conn_settings *conn) 5028 { 5029 struct ieee80211_local *local = sdata->local; 5030 bool is_6ghz = cbss->channel->band == NL80211_BAND_6GHZ; 5031 struct ieee80211_chan_req chanreq = {}; 5032 struct ieee802_11_elems *elems; 5033 int ret; 5034 u32 i; 5035 5036 lockdep_assert_wiphy(local->hw.wiphy); 5037 5038 rcu_read_lock(); 5039 elems = ieee80211_determine_chan_mode(sdata, conn, cbss, link_id, 5040 &chanreq); 5041 5042 if (IS_ERR(elems)) { 5043 rcu_read_unlock(); 5044 return PTR_ERR(elems); 5045 } 5046 5047 if (mlo && !elems->ml_basic) { 5048 sdata_info(sdata, "Rejecting MLO as it is not supported by AP\n"); 5049 rcu_read_unlock(); 5050 kfree(elems); 5051 return -EINVAL; 5052 } 5053 5054 if (link && is_6ghz && conn->mode >= IEEE80211_CONN_MODE_HE) { 5055 struct ieee80211_bss_conf *bss_conf; 5056 u8 j = 0; 5057 5058 bss_conf = link->conf; 5059 5060 if (elems->pwr_constr_elem) 5061 bss_conf->pwr_reduction = *elems->pwr_constr_elem; 5062 5063 BUILD_BUG_ON(ARRAY_SIZE(bss_conf->tx_pwr_env) != 5064 ARRAY_SIZE(elems->tx_pwr_env)); 5065 5066 for (i = 0; i < elems->tx_pwr_env_num; i++) { 5067 if (elems->tx_pwr_env_len[i] > sizeof(bss_conf->tx_pwr_env[j])) 5068 continue; 5069 5070 bss_conf->tx_pwr_env_num++; 5071 memcpy(&bss_conf->tx_pwr_env[j], elems->tx_pwr_env[i], 5072 elems->tx_pwr_env_len[i]); 5073 j++; 5074 } 5075 } 5076 rcu_read_unlock(); 5077 /* the element data was RCU protected so no longer valid anyway */ 5078 kfree(elems); 5079 elems = NULL; 5080 5081 if (!link) 5082 return 0; 5083 5084 rcu_read_lock(); 5085 link->needed_rx_chains = min(ieee80211_max_rx_chains(link, cbss), 5086 local->rx_chains); 5087 rcu_read_unlock(); 5088 5089 /* 5090 * If this fails (possibly due to channel context sharing 5091 * on incompatible channels, e.g. 80+80 and 160 sharing the 5092 * same control channel) try to use a smaller bandwidth. 5093 */ 5094 ret = ieee80211_link_use_channel(link, &chanreq, 5095 IEEE80211_CHANCTX_SHARED); 5096 5097 /* don't downgrade for 5 and 10 MHz channels, though. */ 5098 if (chanreq.oper.width == NL80211_CHAN_WIDTH_5 || 5099 chanreq.oper.width == NL80211_CHAN_WIDTH_10) 5100 return ret; 5101 5102 while (ret && chanreq.oper.width != NL80211_CHAN_WIDTH_20_NOHT) { 5103 ieee80211_chanreq_downgrade(&chanreq, conn); 5104 5105 ret = ieee80211_link_use_channel(link, &chanreq, 5106 IEEE80211_CHANCTX_SHARED); 5107 } 5108 5109 return ret; 5110 } 5111 5112 static bool ieee80211_get_dtim(const struct cfg80211_bss_ies *ies, 5113 u8 *dtim_count, u8 *dtim_period) 5114 { 5115 const u8 *tim_ie = cfg80211_find_ie(WLAN_EID_TIM, ies->data, ies->len); 5116 const u8 *idx_ie = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX, ies->data, 5117 ies->len); 5118 const struct ieee80211_tim_ie *tim = NULL; 5119 const struct ieee80211_bssid_index *idx; 5120 bool valid = tim_ie && tim_ie[1] >= 2; 5121 5122 if (valid) 5123 tim = (void *)(tim_ie + 2); 5124 5125 if (dtim_count) 5126 *dtim_count = valid ? tim->dtim_count : 0; 5127 5128 if (dtim_period) 5129 *dtim_period = valid ? tim->dtim_period : 0; 5130 5131 /* Check if value is overridden by non-transmitted profile */ 5132 if (!idx_ie || idx_ie[1] < 3) 5133 return valid; 5134 5135 idx = (void *)(idx_ie + 2); 5136 5137 if (dtim_count) 5138 *dtim_count = idx->dtim_count; 5139 5140 if (dtim_period) 5141 *dtim_period = idx->dtim_period; 5142 5143 return true; 5144 } 5145 5146 static bool ieee80211_assoc_success(struct ieee80211_sub_if_data *sdata, 5147 struct ieee80211_mgmt *mgmt, 5148 struct ieee802_11_elems *elems, 5149 const u8 *elem_start, unsigned int elem_len) 5150 { 5151 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5152 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5153 struct ieee80211_local *local = sdata->local; 5154 unsigned int link_id; 5155 struct sta_info *sta; 5156 u64 changed[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5157 u16 valid_links = 0, dormant_links = 0; 5158 int err; 5159 5160 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5161 /* 5162 * station info was already allocated and inserted before 5163 * the association and should be available to us 5164 */ 5165 sta = sta_info_get(sdata, assoc_data->ap_addr); 5166 if (WARN_ON(!sta)) 5167 goto out_err; 5168 5169 sta->sta.spp_amsdu = assoc_data->spp_amsdu; 5170 5171 if (ieee80211_vif_is_mld(&sdata->vif)) { 5172 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5173 if (!assoc_data->link[link_id].bss) 5174 continue; 5175 5176 valid_links |= BIT(link_id); 5177 if (assoc_data->link[link_id].disabled) 5178 dormant_links |= BIT(link_id); 5179 5180 if (link_id != assoc_data->assoc_link_id) { 5181 err = ieee80211_sta_allocate_link(sta, link_id); 5182 if (err) 5183 goto out_err; 5184 } 5185 } 5186 5187 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5188 } 5189 5190 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5191 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 5192 struct ieee80211_link_data *link; 5193 struct link_sta_info *link_sta; 5194 5195 if (!cbss) 5196 continue; 5197 5198 link = sdata_dereference(sdata->link[link_id], sdata); 5199 if (WARN_ON(!link)) 5200 goto out_err; 5201 5202 if (ieee80211_vif_is_mld(&sdata->vif)) 5203 link_info(link, 5204 "local address %pM, AP link address %pM%s\n", 5205 link->conf->addr, 5206 assoc_data->link[link_id].bss->bssid, 5207 link_id == assoc_data->assoc_link_id ? 5208 " (assoc)" : ""); 5209 5210 link_sta = rcu_dereference_protected(sta->link[link_id], 5211 lockdep_is_held(&local->hw.wiphy->mtx)); 5212 if (WARN_ON(!link_sta)) 5213 goto out_err; 5214 5215 if (!link->u.mgd.have_beacon) { 5216 const struct cfg80211_bss_ies *ies; 5217 5218 rcu_read_lock(); 5219 ies = rcu_dereference(cbss->beacon_ies); 5220 if (ies) 5221 link->u.mgd.have_beacon = true; 5222 else 5223 ies = rcu_dereference(cbss->ies); 5224 ieee80211_get_dtim(ies, 5225 &link->conf->sync_dtim_count, 5226 &link->u.mgd.dtim_period); 5227 link->conf->beacon_int = cbss->beacon_interval; 5228 rcu_read_unlock(); 5229 } 5230 5231 link->conf->dtim_period = link->u.mgd.dtim_period ?: 1; 5232 5233 if (link_id != assoc_data->assoc_link_id) { 5234 link->u.mgd.conn = assoc_data->link[link_id].conn; 5235 5236 err = ieee80211_prep_channel(sdata, link, link_id, cbss, 5237 true, &link->u.mgd.conn); 5238 if (err) { 5239 link_info(link, "prep_channel failed\n"); 5240 goto out_err; 5241 } 5242 } 5243 5244 err = ieee80211_mgd_setup_link_sta(link, sta, link_sta, 5245 assoc_data->link[link_id].bss); 5246 if (err) 5247 goto out_err; 5248 5249 if (!ieee80211_assoc_config_link(link, link_sta, 5250 assoc_data->link[link_id].bss, 5251 mgmt, elem_start, elem_len, 5252 &changed[link_id])) 5253 goto out_err; 5254 5255 if (assoc_data->link[link_id].status != WLAN_STATUS_SUCCESS) { 5256 valid_links &= ~BIT(link_id); 5257 ieee80211_sta_remove_link(sta, link_id); 5258 continue; 5259 } 5260 5261 if (link_id != assoc_data->assoc_link_id) { 5262 err = ieee80211_sta_activate_link(sta, link_id); 5263 if (err) 5264 goto out_err; 5265 } 5266 } 5267 5268 /* links might have changed due to rejected ones, set them again */ 5269 ieee80211_vif_set_links(sdata, valid_links, dormant_links); 5270 5271 rate_control_rate_init(sta); 5272 5273 if (ifmgd->flags & IEEE80211_STA_MFP_ENABLED) { 5274 set_sta_flag(sta, WLAN_STA_MFP); 5275 sta->sta.mfp = true; 5276 } else { 5277 sta->sta.mfp = false; 5278 } 5279 5280 ieee80211_sta_set_max_amsdu_subframes(sta, elems->ext_capab, 5281 elems->ext_capab_len); 5282 5283 sta->sta.wme = (elems->wmm_param || elems->s1g_capab) && 5284 local->hw.queues >= IEEE80211_NUM_ACS; 5285 5286 err = sta_info_move_state(sta, IEEE80211_STA_ASSOC); 5287 if (!err && !(ifmgd->flags & IEEE80211_STA_CONTROL_PORT)) 5288 err = sta_info_move_state(sta, IEEE80211_STA_AUTHORIZED); 5289 if (err) { 5290 sdata_info(sdata, 5291 "failed to move station %pM to desired state\n", 5292 sta->sta.addr); 5293 WARN_ON(__sta_info_destroy(sta)); 5294 goto out_err; 5295 } 5296 5297 if (sdata->wdev.use_4addr) 5298 drv_sta_set_4addr(local, sdata, &sta->sta, true); 5299 5300 ieee80211_set_associated(sdata, assoc_data, changed); 5301 5302 /* 5303 * If we're using 4-addr mode, let the AP know that we're 5304 * doing so, so that it can create the STA VLAN on its side 5305 */ 5306 if (ifmgd->use_4addr) 5307 ieee80211_send_4addr_nullfunc(local, sdata); 5308 5309 /* 5310 * Start timer to probe the connection to the AP now. 5311 * Also start the timer that will detect beacon loss. 5312 */ 5313 ieee80211_sta_reset_beacon_monitor(sdata); 5314 ieee80211_sta_reset_conn_monitor(sdata); 5315 5316 return true; 5317 out_err: 5318 eth_zero_addr(sdata->vif.cfg.ap_addr); 5319 return false; 5320 } 5321 5322 static void ieee80211_rx_mgmt_assoc_resp(struct ieee80211_sub_if_data *sdata, 5323 struct ieee80211_mgmt *mgmt, 5324 size_t len) 5325 { 5326 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 5327 struct ieee80211_mgd_assoc_data *assoc_data = ifmgd->assoc_data; 5328 u16 capab_info, status_code, aid; 5329 struct ieee80211_elems_parse_params parse_params = { 5330 .bss = NULL, 5331 .link_id = -1, 5332 .from_ap = true, 5333 }; 5334 struct ieee802_11_elems *elems; 5335 int ac; 5336 const u8 *elem_start; 5337 unsigned int elem_len; 5338 bool reassoc; 5339 struct ieee80211_event event = { 5340 .type = MLME_EVENT, 5341 .u.mlme.data = ASSOC_EVENT, 5342 }; 5343 struct ieee80211_prep_tx_info info = {}; 5344 struct cfg80211_rx_assoc_resp_data resp = { 5345 .uapsd_queues = -1, 5346 }; 5347 u8 ap_mld_addr[ETH_ALEN] __aligned(2); 5348 unsigned int link_id; 5349 5350 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5351 5352 if (!assoc_data) 5353 return; 5354 5355 parse_params.mode = 5356 assoc_data->link[assoc_data->assoc_link_id].conn.mode; 5357 5358 if (!ether_addr_equal(assoc_data->ap_addr, mgmt->bssid) || 5359 !ether_addr_equal(assoc_data->ap_addr, mgmt->sa)) 5360 return; 5361 5362 /* 5363 * AssocResp and ReassocResp have identical structure, so process both 5364 * of them in this function. 5365 */ 5366 5367 if (len < 24 + 6) 5368 return; 5369 5370 reassoc = ieee80211_is_reassoc_resp(mgmt->frame_control); 5371 capab_info = le16_to_cpu(mgmt->u.assoc_resp.capab_info); 5372 status_code = le16_to_cpu(mgmt->u.assoc_resp.status_code); 5373 if (assoc_data->s1g) 5374 elem_start = mgmt->u.s1g_assoc_resp.variable; 5375 else 5376 elem_start = mgmt->u.assoc_resp.variable; 5377 5378 /* 5379 * Note: this may not be perfect, AP might misbehave - if 5380 * anyone needs to rely on perfect complete notification 5381 * with the exact right subtype, then we need to track what 5382 * we actually transmitted. 5383 */ 5384 info.subtype = reassoc ? IEEE80211_STYPE_REASSOC_REQ : 5385 IEEE80211_STYPE_ASSOC_REQ; 5386 5387 if (assoc_data->fils_kek_len && 5388 fils_decrypt_assoc_resp(sdata, (u8 *)mgmt, &len, assoc_data) < 0) 5389 return; 5390 5391 elem_len = len - (elem_start - (u8 *)mgmt); 5392 parse_params.start = elem_start; 5393 parse_params.len = elem_len; 5394 elems = ieee802_11_parse_elems_full(&parse_params); 5395 if (!elems) 5396 goto notify_driver; 5397 5398 if (elems->aid_resp) 5399 aid = le16_to_cpu(elems->aid_resp->aid); 5400 else if (assoc_data->s1g) 5401 aid = 0; /* TODO */ 5402 else 5403 aid = le16_to_cpu(mgmt->u.assoc_resp.aid); 5404 5405 /* 5406 * The 5 MSB of the AID field are reserved 5407 * (802.11-2016 9.4.1.8 AID field) 5408 */ 5409 aid &= 0x7ff; 5410 5411 sdata_info(sdata, 5412 "RX %sssocResp from %pM (capab=0x%x status=%d aid=%d)\n", 5413 reassoc ? "Rea" : "A", assoc_data->ap_addr, 5414 capab_info, status_code, (u16)(aid & ~(BIT(15) | BIT(14)))); 5415 5416 ifmgd->broken_ap = false; 5417 5418 if (status_code == WLAN_STATUS_ASSOC_REJECTED_TEMPORARILY && 5419 elems->timeout_int && 5420 elems->timeout_int->type == WLAN_TIMEOUT_ASSOC_COMEBACK) { 5421 u32 tu, ms; 5422 5423 cfg80211_assoc_comeback(sdata->dev, assoc_data->ap_addr, 5424 le32_to_cpu(elems->timeout_int->value)); 5425 5426 tu = le32_to_cpu(elems->timeout_int->value); 5427 ms = tu * 1024 / 1000; 5428 sdata_info(sdata, 5429 "%pM rejected association temporarily; comeback duration %u TU (%u ms)\n", 5430 assoc_data->ap_addr, tu, ms); 5431 assoc_data->timeout = jiffies + msecs_to_jiffies(ms); 5432 assoc_data->timeout_started = true; 5433 assoc_data->comeback = true; 5434 if (ms > IEEE80211_ASSOC_TIMEOUT) 5435 run_again(sdata, assoc_data->timeout); 5436 goto notify_driver; 5437 } 5438 5439 if (status_code != WLAN_STATUS_SUCCESS) { 5440 sdata_info(sdata, "%pM denied association (code=%d)\n", 5441 assoc_data->ap_addr, status_code); 5442 event.u.mlme.status = MLME_DENIED; 5443 event.u.mlme.reason = status_code; 5444 drv_event_callback(sdata->local, sdata, &event); 5445 } else { 5446 if (aid == 0 || aid > IEEE80211_MAX_AID) { 5447 sdata_info(sdata, 5448 "invalid AID value %d (out of range), turn off PS\n", 5449 aid); 5450 aid = 0; 5451 ifmgd->broken_ap = true; 5452 } 5453 5454 if (ieee80211_vif_is_mld(&sdata->vif)) { 5455 struct ieee80211_mle_basic_common_info *common; 5456 5457 if (!elems->ml_basic) { 5458 sdata_info(sdata, 5459 "MLO association with %pM but no (basic) multi-link element in response!\n", 5460 assoc_data->ap_addr); 5461 goto abandon_assoc; 5462 } 5463 5464 common = (void *)elems->ml_basic->variable; 5465 5466 if (memcmp(assoc_data->ap_addr, 5467 common->mld_mac_addr, ETH_ALEN)) { 5468 sdata_info(sdata, 5469 "AP MLD MAC address mismatch: got %pM expected %pM\n", 5470 common->mld_mac_addr, 5471 assoc_data->ap_addr); 5472 goto abandon_assoc; 5473 } 5474 5475 sdata->vif.cfg.eml_cap = 5476 ieee80211_mle_get_eml_cap((const void *)elems->ml_basic); 5477 sdata->vif.cfg.eml_med_sync_delay = 5478 ieee80211_mle_get_eml_med_sync_delay((const void *)elems->ml_basic); 5479 sdata->vif.cfg.mld_capa_op = 5480 ieee80211_mle_get_mld_capa_op((const void *)elems->ml_basic); 5481 } 5482 5483 sdata->vif.cfg.aid = aid; 5484 5485 if (!ieee80211_assoc_success(sdata, mgmt, elems, 5486 elem_start, elem_len)) { 5487 /* oops -- internal error -- send timeout for now */ 5488 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 5489 goto notify_driver; 5490 } 5491 event.u.mlme.status = MLME_SUCCESS; 5492 drv_event_callback(sdata->local, sdata, &event); 5493 sdata_info(sdata, "associated\n"); 5494 5495 info.success = 1; 5496 } 5497 5498 for (link_id = 0; link_id < IEEE80211_MLD_MAX_NUM_LINKS; link_id++) { 5499 struct ieee80211_link_data *link; 5500 5501 if (!assoc_data->link[link_id].bss) 5502 continue; 5503 5504 resp.links[link_id].bss = assoc_data->link[link_id].bss; 5505 ether_addr_copy(resp.links[link_id].addr, 5506 assoc_data->link[link_id].addr); 5507 resp.links[link_id].status = assoc_data->link[link_id].status; 5508 5509 link = sdata_dereference(sdata->link[link_id], sdata); 5510 if (!link) 5511 continue; 5512 5513 /* get uapsd queues configuration - same for all links */ 5514 resp.uapsd_queues = 0; 5515 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) 5516 if (link->tx_conf[ac].uapsd) 5517 resp.uapsd_queues |= ieee80211_ac_to_qos_mask[ac]; 5518 } 5519 5520 if (ieee80211_vif_is_mld(&sdata->vif)) { 5521 ether_addr_copy(ap_mld_addr, sdata->vif.cfg.ap_addr); 5522 resp.ap_mld_addr = ap_mld_addr; 5523 } 5524 5525 ieee80211_destroy_assoc_data(sdata, 5526 status_code == WLAN_STATUS_SUCCESS ? 5527 ASSOC_SUCCESS : 5528 ASSOC_REJECTED); 5529 5530 resp.buf = (u8 *)mgmt; 5531 resp.len = len; 5532 resp.req_ies = ifmgd->assoc_req_ies; 5533 resp.req_ies_len = ifmgd->assoc_req_ies_len; 5534 cfg80211_rx_assoc_resp(sdata->dev, &resp); 5535 notify_driver: 5536 drv_mgd_complete_tx(sdata->local, sdata, &info); 5537 kfree(elems); 5538 return; 5539 abandon_assoc: 5540 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 5541 goto notify_driver; 5542 } 5543 5544 static void ieee80211_rx_bss_info(struct ieee80211_link_data *link, 5545 struct ieee80211_mgmt *mgmt, size_t len, 5546 struct ieee80211_rx_status *rx_status) 5547 { 5548 struct ieee80211_sub_if_data *sdata = link->sdata; 5549 struct ieee80211_local *local = sdata->local; 5550 struct ieee80211_bss *bss; 5551 struct ieee80211_channel *channel; 5552 5553 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5554 5555 channel = ieee80211_get_channel_khz(local->hw.wiphy, 5556 ieee80211_rx_status_to_khz(rx_status)); 5557 if (!channel) 5558 return; 5559 5560 bss = ieee80211_bss_info_update(local, rx_status, mgmt, len, channel); 5561 if (bss) { 5562 link->conf->beacon_rate = bss->beacon_rate; 5563 ieee80211_rx_bss_put(local, bss); 5564 } 5565 } 5566 5567 5568 static void ieee80211_rx_mgmt_probe_resp(struct ieee80211_link_data *link, 5569 struct sk_buff *skb) 5570 { 5571 struct ieee80211_sub_if_data *sdata = link->sdata; 5572 struct ieee80211_mgmt *mgmt = (void *)skb->data; 5573 struct ieee80211_if_managed *ifmgd; 5574 struct ieee80211_rx_status *rx_status = (void *) skb->cb; 5575 struct ieee80211_channel *channel; 5576 size_t baselen, len = skb->len; 5577 5578 ifmgd = &sdata->u.mgd; 5579 5580 lockdep_assert_wiphy(sdata->local->hw.wiphy); 5581 5582 /* 5583 * According to Draft P802.11ax D6.0 clause 26.17.2.3.2: 5584 * "If a 6 GHz AP receives a Probe Request frame and responds with 5585 * a Probe Response frame [..], the Address 1 field of the Probe 5586 * Response frame shall be set to the broadcast address [..]" 5587 * So, on 6GHz band we should also accept broadcast responses. 5588 */ 5589 channel = ieee80211_get_channel(sdata->local->hw.wiphy, 5590 rx_status->freq); 5591 if (!channel) 5592 return; 5593 5594 if (!ether_addr_equal(mgmt->da, sdata->vif.addr) && 5595 (channel->band != NL80211_BAND_6GHZ || 5596 !is_broadcast_ether_addr(mgmt->da))) 5597 return; /* ignore ProbeResp to foreign address */ 5598 5599 baselen = (u8 *) mgmt->u.probe_resp.variable - (u8 *) mgmt; 5600 if (baselen > len) 5601 return; 5602 5603 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 5604 5605 if (ifmgd->associated && 5606 ether_addr_equal(mgmt->bssid, link->u.mgd.bssid)) 5607 ieee80211_reset_ap_probe(sdata); 5608 } 5609 5610 /* 5611 * This is the canonical list of information elements we care about, 5612 * the filter code also gives us all changes to the Microsoft OUI 5613 * (00:50:F2) vendor IE which is used for WMM which we need to track, 5614 * as well as the DTPC IE (part of the Cisco OUI) used for signaling 5615 * changes to requested client power. 5616 * 5617 * We implement beacon filtering in software since that means we can 5618 * avoid processing the frame here and in cfg80211, and userspace 5619 * will not be able to tell whether the hardware supports it or not. 5620 * 5621 * XXX: This list needs to be dynamic -- userspace needs to be able to 5622 * add items it requires. It also needs to be able to tell us to 5623 * look out for other vendor IEs. 5624 */ 5625 static const u64 care_about_ies = 5626 (1ULL << WLAN_EID_COUNTRY) | 5627 (1ULL << WLAN_EID_ERP_INFO) | 5628 (1ULL << WLAN_EID_CHANNEL_SWITCH) | 5629 (1ULL << WLAN_EID_PWR_CONSTRAINT) | 5630 (1ULL << WLAN_EID_HT_CAPABILITY) | 5631 (1ULL << WLAN_EID_HT_OPERATION) | 5632 (1ULL << WLAN_EID_EXT_CHANSWITCH_ANN); 5633 5634 static void ieee80211_handle_beacon_sig(struct ieee80211_link_data *link, 5635 struct ieee80211_if_managed *ifmgd, 5636 struct ieee80211_bss_conf *bss_conf, 5637 struct ieee80211_local *local, 5638 struct ieee80211_rx_status *rx_status) 5639 { 5640 struct ieee80211_sub_if_data *sdata = link->sdata; 5641 5642 /* Track average RSSI from the Beacon frames of the current AP */ 5643 5644 if (!link->u.mgd.tracking_signal_avg) { 5645 link->u.mgd.tracking_signal_avg = true; 5646 ewma_beacon_signal_init(&link->u.mgd.ave_beacon_signal); 5647 link->u.mgd.last_cqm_event_signal = 0; 5648 link->u.mgd.count_beacon_signal = 1; 5649 link->u.mgd.last_ave_beacon_signal = 0; 5650 } else { 5651 link->u.mgd.count_beacon_signal++; 5652 } 5653 5654 ewma_beacon_signal_add(&link->u.mgd.ave_beacon_signal, 5655 -rx_status->signal); 5656 5657 if (ifmgd->rssi_min_thold != ifmgd->rssi_max_thold && 5658 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5659 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5660 int last_sig = link->u.mgd.last_ave_beacon_signal; 5661 struct ieee80211_event event = { 5662 .type = RSSI_EVENT, 5663 }; 5664 5665 /* 5666 * if signal crosses either of the boundaries, invoke callback 5667 * with appropriate parameters 5668 */ 5669 if (sig > ifmgd->rssi_max_thold && 5670 (last_sig <= ifmgd->rssi_min_thold || last_sig == 0)) { 5671 link->u.mgd.last_ave_beacon_signal = sig; 5672 event.u.rssi.data = RSSI_EVENT_HIGH; 5673 drv_event_callback(local, sdata, &event); 5674 } else if (sig < ifmgd->rssi_min_thold && 5675 (last_sig >= ifmgd->rssi_max_thold || 5676 last_sig == 0)) { 5677 link->u.mgd.last_ave_beacon_signal = sig; 5678 event.u.rssi.data = RSSI_EVENT_LOW; 5679 drv_event_callback(local, sdata, &event); 5680 } 5681 } 5682 5683 if (bss_conf->cqm_rssi_thold && 5684 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT && 5685 !(sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_CQM_RSSI)) { 5686 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5687 int last_event = link->u.mgd.last_cqm_event_signal; 5688 int thold = bss_conf->cqm_rssi_thold; 5689 int hyst = bss_conf->cqm_rssi_hyst; 5690 5691 if (sig < thold && 5692 (last_event == 0 || sig < last_event - hyst)) { 5693 link->u.mgd.last_cqm_event_signal = sig; 5694 ieee80211_cqm_rssi_notify( 5695 &sdata->vif, 5696 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5697 sig, GFP_KERNEL); 5698 } else if (sig > thold && 5699 (last_event == 0 || sig > last_event + hyst)) { 5700 link->u.mgd.last_cqm_event_signal = sig; 5701 ieee80211_cqm_rssi_notify( 5702 &sdata->vif, 5703 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5704 sig, GFP_KERNEL); 5705 } 5706 } 5707 5708 if (bss_conf->cqm_rssi_low && 5709 link->u.mgd.count_beacon_signal >= IEEE80211_SIGNAL_AVE_MIN_COUNT) { 5710 int sig = -ewma_beacon_signal_read(&link->u.mgd.ave_beacon_signal); 5711 int last_event = link->u.mgd.last_cqm_event_signal; 5712 int low = bss_conf->cqm_rssi_low; 5713 int high = bss_conf->cqm_rssi_high; 5714 5715 if (sig < low && 5716 (last_event == 0 || last_event >= low)) { 5717 link->u.mgd.last_cqm_event_signal = sig; 5718 ieee80211_cqm_rssi_notify( 5719 &sdata->vif, 5720 NL80211_CQM_RSSI_THRESHOLD_EVENT_LOW, 5721 sig, GFP_KERNEL); 5722 } else if (sig > high && 5723 (last_event == 0 || last_event <= high)) { 5724 link->u.mgd.last_cqm_event_signal = sig; 5725 ieee80211_cqm_rssi_notify( 5726 &sdata->vif, 5727 NL80211_CQM_RSSI_THRESHOLD_EVENT_HIGH, 5728 sig, GFP_KERNEL); 5729 } 5730 } 5731 } 5732 5733 static bool ieee80211_rx_our_beacon(const u8 *tx_bssid, 5734 struct cfg80211_bss *bss) 5735 { 5736 if (ether_addr_equal(tx_bssid, bss->bssid)) 5737 return true; 5738 if (!bss->transmitted_bss) 5739 return false; 5740 return ether_addr_equal(tx_bssid, bss->transmitted_bss->bssid); 5741 } 5742 5743 static void ieee80211_ml_reconf_work(struct wiphy *wiphy, 5744 struct wiphy_work *work) 5745 { 5746 struct ieee80211_sub_if_data *sdata = 5747 container_of(work, struct ieee80211_sub_if_data, 5748 u.mgd.ml_reconf_work.work); 5749 u16 new_valid_links, new_active_links, new_dormant_links; 5750 int ret; 5751 5752 if (!sdata->u.mgd.removed_links) 5753 return; 5754 5755 sdata_info(sdata, 5756 "MLO Reconfiguration: work: valid=0x%x, removed=0x%x\n", 5757 sdata->vif.valid_links, sdata->u.mgd.removed_links); 5758 5759 new_valid_links = sdata->vif.valid_links & ~sdata->u.mgd.removed_links; 5760 if (new_valid_links == sdata->vif.valid_links) 5761 return; 5762 5763 if (!new_valid_links || 5764 !(new_valid_links & ~sdata->vif.dormant_links)) { 5765 sdata_info(sdata, "No valid links after reconfiguration\n"); 5766 ret = -EINVAL; 5767 goto out; 5768 } 5769 5770 new_active_links = sdata->vif.active_links & ~sdata->u.mgd.removed_links; 5771 if (new_active_links != sdata->vif.active_links) { 5772 if (!new_active_links) 5773 new_active_links = 5774 BIT(ffs(new_valid_links & 5775 ~sdata->vif.dormant_links) - 1); 5776 5777 ret = ieee80211_set_active_links(&sdata->vif, new_active_links); 5778 if (ret) { 5779 sdata_info(sdata, 5780 "Failed setting active links\n"); 5781 goto out; 5782 } 5783 } 5784 5785 new_dormant_links = sdata->vif.dormant_links & ~sdata->u.mgd.removed_links; 5786 5787 ret = ieee80211_vif_set_links(sdata, new_valid_links, 5788 new_dormant_links); 5789 if (ret) 5790 sdata_info(sdata, "Failed setting valid links\n"); 5791 5792 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_VALID_LINKS); 5793 5794 out: 5795 if (!ret) 5796 cfg80211_links_removed(sdata->dev, sdata->u.mgd.removed_links); 5797 else 5798 __ieee80211_disconnect(sdata); 5799 5800 sdata->u.mgd.removed_links = 0; 5801 } 5802 5803 static void ieee80211_ml_reconfiguration(struct ieee80211_sub_if_data *sdata, 5804 struct ieee802_11_elems *elems) 5805 { 5806 const struct element *sub; 5807 unsigned long removed_links = 0; 5808 u16 link_removal_timeout[IEEE80211_MLD_MAX_NUM_LINKS] = {}; 5809 u8 link_id; 5810 u32 delay; 5811 5812 if (!ieee80211_vif_is_mld(&sdata->vif) || !elems->ml_reconf) 5813 return; 5814 5815 /* Directly parse the sub elements as the common information doesn't 5816 * hold any useful information. 5817 */ 5818 for_each_mle_subelement(sub, (const u8 *)elems->ml_reconf, 5819 elems->ml_reconf_len) { 5820 struct ieee80211_mle_per_sta_profile *prof = (void *)sub->data; 5821 u8 *pos = prof->variable; 5822 u16 control; 5823 5824 if (sub->id != IEEE80211_MLE_SUBELEM_PER_STA_PROFILE) 5825 continue; 5826 5827 if (!ieee80211_mle_reconf_sta_prof_size_ok(sub->data, 5828 sub->datalen)) 5829 return; 5830 5831 control = le16_to_cpu(prof->control); 5832 link_id = control & IEEE80211_MLE_STA_RECONF_CONTROL_LINK_ID; 5833 5834 removed_links |= BIT(link_id); 5835 5836 /* the MAC address should not be included, but handle it */ 5837 if (control & 5838 IEEE80211_MLE_STA_RECONF_CONTROL_STA_MAC_ADDR_PRESENT) 5839 pos += 6; 5840 5841 /* According to Draft P802.11be_D3.0, the control should 5842 * include the AP Removal Timer present. If the AP Removal Timer 5843 * is not present assume immediate removal. 5844 */ 5845 if (control & 5846 IEEE80211_MLE_STA_RECONF_CONTROL_AP_REM_TIMER_PRESENT) 5847 link_removal_timeout[link_id] = get_unaligned_le16(pos); 5848 } 5849 5850 removed_links &= sdata->vif.valid_links; 5851 if (!removed_links) { 5852 /* In case the removal was cancelled, abort it */ 5853 if (sdata->u.mgd.removed_links) { 5854 sdata->u.mgd.removed_links = 0; 5855 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 5856 &sdata->u.mgd.ml_reconf_work); 5857 } 5858 return; 5859 } 5860 5861 delay = 0; 5862 for_each_set_bit(link_id, &removed_links, IEEE80211_MLD_MAX_NUM_LINKS) { 5863 struct ieee80211_bss_conf *link_conf = 5864 sdata_dereference(sdata->vif.link_conf[link_id], sdata); 5865 u32 link_delay; 5866 5867 if (!link_conf) { 5868 removed_links &= ~BIT(link_id); 5869 continue; 5870 } 5871 5872 if (link_removal_timeout[link_id] < 1) 5873 link_delay = 0; 5874 else 5875 link_delay = link_conf->beacon_int * 5876 (link_removal_timeout[link_id] - 1); 5877 5878 if (!delay) 5879 delay = link_delay; 5880 else 5881 delay = min(delay, link_delay); 5882 } 5883 5884 sdata->u.mgd.removed_links = removed_links; 5885 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 5886 &sdata->u.mgd.ml_reconf_work, 5887 TU_TO_JIFFIES(delay)); 5888 } 5889 5890 static int ieee80211_ttlm_set_links(struct ieee80211_sub_if_data *sdata, 5891 u16 active_links, u16 dormant_links, 5892 u16 suspended_links) 5893 { 5894 u64 changed = 0; 5895 int ret; 5896 5897 if (!active_links) { 5898 ret = -EINVAL; 5899 goto out; 5900 } 5901 5902 /* If there is an active negotiated TTLM, it should be discarded by 5903 * the new negotiated/advertised TTLM. 5904 */ 5905 if (sdata->vif.neg_ttlm.valid) { 5906 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 5907 sdata->vif.suspended_links = 0; 5908 changed = BSS_CHANGED_MLD_TTLM; 5909 } 5910 5911 if (sdata->vif.active_links != active_links) { 5912 /* usable links are affected when active_links are changed, 5913 * so notify the driver about the status change 5914 */ 5915 changed |= BSS_CHANGED_MLD_VALID_LINKS; 5916 active_links &= sdata->vif.active_links; 5917 if (!active_links) 5918 active_links = 5919 BIT(__ffs(sdata->vif.valid_links & 5920 ~dormant_links)); 5921 ret = ieee80211_set_active_links(&sdata->vif, active_links); 5922 if (ret) { 5923 sdata_info(sdata, "Failed to set TTLM active links\n"); 5924 goto out; 5925 } 5926 } 5927 5928 ret = ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 5929 dormant_links); 5930 if (ret) { 5931 sdata_info(sdata, "Failed to set TTLM dormant links\n"); 5932 goto out; 5933 } 5934 5935 sdata->vif.suspended_links = suspended_links; 5936 if (sdata->vif.suspended_links) 5937 changed |= BSS_CHANGED_MLD_TTLM; 5938 5939 ieee80211_vif_cfg_change_notify(sdata, changed); 5940 5941 out: 5942 if (ret) 5943 ieee80211_disconnect(&sdata->vif, false); 5944 5945 return ret; 5946 } 5947 5948 static void ieee80211_tid_to_link_map_work(struct wiphy *wiphy, 5949 struct wiphy_work *work) 5950 { 5951 u16 new_active_links, new_dormant_links; 5952 struct ieee80211_sub_if_data *sdata = 5953 container_of(work, struct ieee80211_sub_if_data, 5954 u.mgd.ttlm_work.work); 5955 5956 new_active_links = sdata->u.mgd.ttlm_info.map & 5957 sdata->vif.valid_links; 5958 new_dormant_links = ~sdata->u.mgd.ttlm_info.map & 5959 sdata->vif.valid_links; 5960 5961 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 0); 5962 if (ieee80211_ttlm_set_links(sdata, new_active_links, new_dormant_links, 5963 0)) 5964 return; 5965 5966 sdata->u.mgd.ttlm_info.active = true; 5967 sdata->u.mgd.ttlm_info.switch_time = 0; 5968 } 5969 5970 static u16 ieee80211_get_ttlm(u8 bm_size, u8 *data) 5971 { 5972 if (bm_size == 1) 5973 return *data; 5974 else 5975 return get_unaligned_le16(data); 5976 } 5977 5978 static int 5979 ieee80211_parse_adv_t2l(struct ieee80211_sub_if_data *sdata, 5980 const struct ieee80211_ttlm_elem *ttlm, 5981 struct ieee80211_adv_ttlm_info *ttlm_info) 5982 { 5983 /* The element size was already validated in 5984 * ieee80211_tid_to_link_map_size_ok() 5985 */ 5986 u8 control, link_map_presence, map_size, tid; 5987 u8 *pos; 5988 5989 memset(ttlm_info, 0, sizeof(*ttlm_info)); 5990 pos = (void *)ttlm->optional; 5991 control = ttlm->control; 5992 5993 if ((control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) || 5994 !(control & IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT)) 5995 return 0; 5996 5997 if ((control & IEEE80211_TTLM_CONTROL_DIRECTION) != 5998 IEEE80211_TTLM_DIRECTION_BOTH) { 5999 sdata_info(sdata, "Invalid advertised T2L map direction\n"); 6000 return -EINVAL; 6001 } 6002 6003 link_map_presence = *pos; 6004 pos++; 6005 6006 ttlm_info->switch_time = get_unaligned_le16(pos); 6007 6008 /* Since ttlm_info->switch_time == 0 means no switch time, bump it 6009 * by 1. 6010 */ 6011 if (!ttlm_info->switch_time) 6012 ttlm_info->switch_time = 1; 6013 6014 pos += 2; 6015 6016 if (control & IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT) { 6017 ttlm_info->duration = pos[0] | pos[1] << 8 | pos[2] << 16; 6018 pos += 3; 6019 } 6020 6021 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6022 map_size = 1; 6023 else 6024 map_size = 2; 6025 6026 /* According to Draft P802.11be_D3.0 clause 35.3.7.1.7, an AP MLD shall 6027 * not advertise a TID-to-link mapping that does not map all TIDs to the 6028 * same link set, reject frame if not all links have mapping 6029 */ 6030 if (link_map_presence != 0xff) { 6031 sdata_info(sdata, 6032 "Invalid advertised T2L mapping presence indicator\n"); 6033 return -EINVAL; 6034 } 6035 6036 ttlm_info->map = ieee80211_get_ttlm(map_size, pos); 6037 if (!ttlm_info->map) { 6038 sdata_info(sdata, 6039 "Invalid advertised T2L map for TID 0\n"); 6040 return -EINVAL; 6041 } 6042 6043 pos += map_size; 6044 6045 for (tid = 1; tid < 8; tid++) { 6046 u16 map = ieee80211_get_ttlm(map_size, pos); 6047 6048 if (map != ttlm_info->map) { 6049 sdata_info(sdata, "Invalid advertised T2L map for tid %d\n", 6050 tid); 6051 return -EINVAL; 6052 } 6053 6054 pos += map_size; 6055 } 6056 return 0; 6057 } 6058 6059 static void ieee80211_process_adv_ttlm(struct ieee80211_sub_if_data *sdata, 6060 struct ieee802_11_elems *elems, 6061 u64 beacon_ts) 6062 { 6063 u8 i; 6064 int ret; 6065 6066 if (!ieee80211_vif_is_mld(&sdata->vif)) 6067 return; 6068 6069 if (!elems->ttlm_num) { 6070 if (sdata->u.mgd.ttlm_info.switch_time) { 6071 /* if a planned TID-to-link mapping was cancelled - 6072 * abort it 6073 */ 6074 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6075 &sdata->u.mgd.ttlm_work); 6076 } else if (sdata->u.mgd.ttlm_info.active) { 6077 /* if no TID-to-link element, set to default mapping in 6078 * which all TIDs are mapped to all setup links 6079 */ 6080 ret = ieee80211_vif_set_links(sdata, 6081 sdata->vif.valid_links, 6082 0); 6083 if (ret) { 6084 sdata_info(sdata, "Failed setting valid/dormant links\n"); 6085 return; 6086 } 6087 ieee80211_vif_cfg_change_notify(sdata, 6088 BSS_CHANGED_MLD_VALID_LINKS); 6089 } 6090 memset(&sdata->u.mgd.ttlm_info, 0, 6091 sizeof(sdata->u.mgd.ttlm_info)); 6092 return; 6093 } 6094 6095 for (i = 0; i < elems->ttlm_num; i++) { 6096 struct ieee80211_adv_ttlm_info ttlm_info; 6097 u32 res; 6098 6099 res = ieee80211_parse_adv_t2l(sdata, elems->ttlm[i], 6100 &ttlm_info); 6101 6102 if (res) { 6103 __ieee80211_disconnect(sdata); 6104 return; 6105 } 6106 6107 if (ttlm_info.switch_time) { 6108 u16 beacon_ts_tu, st_tu, delay; 6109 u32 delay_jiffies; 6110 u64 mask; 6111 6112 /* The t2l map switch time is indicated with a partial 6113 * TSF value (bits 10 to 25), get the partial beacon TS 6114 * as well, and calc the delay to the start time. 6115 */ 6116 mask = GENMASK_ULL(25, 10); 6117 beacon_ts_tu = (beacon_ts & mask) >> 10; 6118 st_tu = ttlm_info.switch_time; 6119 delay = st_tu - beacon_ts_tu; 6120 6121 /* 6122 * If the switch time is far in the future, then it 6123 * could also be the previous switch still being 6124 * announced. 6125 * We can simply ignore it for now, if it is a future 6126 * switch the AP will continue to announce it anyway. 6127 */ 6128 if (delay > IEEE80211_ADV_TTLM_ST_UNDERFLOW) 6129 return; 6130 6131 delay_jiffies = TU_TO_JIFFIES(delay); 6132 6133 /* Link switching can take time, so schedule it 6134 * 100ms before to be ready on time 6135 */ 6136 if (delay_jiffies > IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS) 6137 delay_jiffies -= 6138 IEEE80211_ADV_TTLM_SAFETY_BUFFER_MS; 6139 else 6140 delay_jiffies = 0; 6141 6142 sdata->u.mgd.ttlm_info = ttlm_info; 6143 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6144 &sdata->u.mgd.ttlm_work); 6145 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6146 &sdata->u.mgd.ttlm_work, 6147 delay_jiffies); 6148 return; 6149 } 6150 } 6151 } 6152 6153 static void ieee80211_rx_mgmt_beacon(struct ieee80211_link_data *link, 6154 struct ieee80211_hdr *hdr, size_t len, 6155 struct ieee80211_rx_status *rx_status) 6156 { 6157 struct ieee80211_sub_if_data *sdata = link->sdata; 6158 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 6159 struct ieee80211_bss_conf *bss_conf = &sdata->vif.bss_conf; 6160 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 6161 struct ieee80211_mgmt *mgmt = (void *) hdr; 6162 size_t baselen; 6163 struct ieee802_11_elems *elems; 6164 struct ieee80211_local *local = sdata->local; 6165 struct ieee80211_chanctx_conf *chanctx_conf; 6166 struct ieee80211_supported_band *sband; 6167 struct ieee80211_channel *chan; 6168 struct link_sta_info *link_sta; 6169 struct sta_info *sta; 6170 u64 changed = 0; 6171 bool erp_valid; 6172 u8 erp_value = 0; 6173 u32 ncrc = 0; 6174 u8 *bssid, *variable = mgmt->u.beacon.variable; 6175 u8 deauth_buf[IEEE80211_DEAUTH_FRAME_LEN]; 6176 struct ieee80211_elems_parse_params parse_params = { 6177 .mode = link->u.mgd.conn.mode, 6178 .link_id = -1, 6179 .from_ap = true, 6180 }; 6181 6182 lockdep_assert_wiphy(local->hw.wiphy); 6183 6184 /* Process beacon from the current BSS */ 6185 bssid = ieee80211_get_bssid(hdr, len, sdata->vif.type); 6186 if (ieee80211_is_s1g_beacon(mgmt->frame_control)) { 6187 struct ieee80211_ext *ext = (void *) mgmt; 6188 6189 if (ieee80211_is_s1g_short_beacon(ext->frame_control)) 6190 variable = ext->u.s1g_short_beacon.variable; 6191 else 6192 variable = ext->u.s1g_beacon.variable; 6193 } 6194 6195 baselen = (u8 *) variable - (u8 *) mgmt; 6196 if (baselen > len) 6197 return; 6198 6199 parse_params.start = variable; 6200 parse_params.len = len - baselen; 6201 6202 rcu_read_lock(); 6203 chanctx_conf = rcu_dereference(link->conf->chanctx_conf); 6204 if (!chanctx_conf) { 6205 rcu_read_unlock(); 6206 return; 6207 } 6208 6209 if (ieee80211_rx_status_to_khz(rx_status) != 6210 ieee80211_channel_to_khz(chanctx_conf->def.chan)) { 6211 rcu_read_unlock(); 6212 return; 6213 } 6214 chan = chanctx_conf->def.chan; 6215 rcu_read_unlock(); 6216 6217 if (ifmgd->assoc_data && ifmgd->assoc_data->need_beacon && 6218 !WARN_ON(ieee80211_vif_is_mld(&sdata->vif)) && 6219 ieee80211_rx_our_beacon(bssid, ifmgd->assoc_data->link[0].bss)) { 6220 parse_params.bss = ifmgd->assoc_data->link[0].bss; 6221 elems = ieee802_11_parse_elems_full(&parse_params); 6222 if (!elems) 6223 return; 6224 6225 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6226 6227 if (elems->dtim_period) 6228 link->u.mgd.dtim_period = elems->dtim_period; 6229 link->u.mgd.have_beacon = true; 6230 ifmgd->assoc_data->need_beacon = false; 6231 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6232 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6233 link->conf->sync_tsf = 6234 le64_to_cpu(mgmt->u.beacon.timestamp); 6235 link->conf->sync_device_ts = 6236 rx_status->device_timestamp; 6237 link->conf->sync_dtim_count = elems->dtim_count; 6238 } 6239 6240 if (elems->mbssid_config_ie) 6241 bss_conf->profile_periodicity = 6242 elems->mbssid_config_ie->profile_periodicity; 6243 else 6244 bss_conf->profile_periodicity = 0; 6245 6246 if (elems->ext_capab_len >= 11 && 6247 (elems->ext_capab[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 6248 bss_conf->ema_ap = true; 6249 else 6250 bss_conf->ema_ap = false; 6251 6252 /* continue assoc process */ 6253 ifmgd->assoc_data->timeout = jiffies; 6254 ifmgd->assoc_data->timeout_started = true; 6255 run_again(sdata, ifmgd->assoc_data->timeout); 6256 kfree(elems); 6257 return; 6258 } 6259 6260 if (!ifmgd->associated || 6261 !ieee80211_rx_our_beacon(bssid, link->conf->bss)) 6262 return; 6263 bssid = link->u.mgd.bssid; 6264 6265 if (!(rx_status->flag & RX_FLAG_NO_SIGNAL_VAL)) 6266 ieee80211_handle_beacon_sig(link, ifmgd, bss_conf, 6267 local, rx_status); 6268 6269 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL) { 6270 mlme_dbg_ratelimited(sdata, 6271 "cancelling AP probe due to a received beacon\n"); 6272 ieee80211_reset_ap_probe(sdata); 6273 } 6274 6275 /* 6276 * Push the beacon loss detection into the future since 6277 * we are processing a beacon from the AP just now. 6278 */ 6279 ieee80211_sta_reset_beacon_monitor(sdata); 6280 6281 /* TODO: CRC urrently not calculated on S1G Beacon Compatibility 6282 * element (which carries the beacon interval). Don't forget to add a 6283 * bit to care_about_ies[] above if mac80211 is interested in a 6284 * changing S1G element. 6285 */ 6286 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6287 ncrc = crc32_be(0, (void *)&mgmt->u.beacon.beacon_int, 4); 6288 parse_params.bss = link->conf->bss; 6289 parse_params.filter = care_about_ies; 6290 parse_params.crc = ncrc; 6291 elems = ieee802_11_parse_elems_full(&parse_params); 6292 if (!elems) 6293 return; 6294 ncrc = elems->crc; 6295 6296 if (ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK) && 6297 ieee80211_check_tim(elems->tim, elems->tim_len, vif_cfg->aid)) { 6298 if (local->hw.conf.dynamic_ps_timeout > 0) { 6299 if (local->hw.conf.flags & IEEE80211_CONF_PS) { 6300 local->hw.conf.flags &= ~IEEE80211_CONF_PS; 6301 ieee80211_hw_config(local, 6302 IEEE80211_CONF_CHANGE_PS); 6303 } 6304 ieee80211_send_nullfunc(local, sdata, false); 6305 } else if (!local->pspolling && sdata->u.mgd.powersave) { 6306 local->pspolling = true; 6307 6308 /* 6309 * Here is assumed that the driver will be 6310 * able to send ps-poll frame and receive a 6311 * response even though power save mode is 6312 * enabled, but some drivers might require 6313 * to disable power save here. This needs 6314 * to be investigated. 6315 */ 6316 ieee80211_send_pspoll(local, sdata); 6317 } 6318 } 6319 6320 if (sdata->vif.p2p || 6321 sdata->vif.driver_flags & IEEE80211_VIF_GET_NOA_UPDATE) { 6322 struct ieee80211_p2p_noa_attr noa = {}; 6323 int ret; 6324 6325 ret = cfg80211_get_p2p_attr(variable, 6326 len - baselen, 6327 IEEE80211_P2P_ATTR_ABSENCE_NOTICE, 6328 (u8 *) &noa, sizeof(noa)); 6329 if (ret >= 2) { 6330 if (link->u.mgd.p2p_noa_index != noa.index) { 6331 /* valid noa_attr and index changed */ 6332 link->u.mgd.p2p_noa_index = noa.index; 6333 memcpy(&bss_conf->p2p_noa_attr, &noa, sizeof(noa)); 6334 changed |= BSS_CHANGED_P2P_PS; 6335 /* 6336 * make sure we update all information, the CRC 6337 * mechanism doesn't look at P2P attributes. 6338 */ 6339 link->u.mgd.beacon_crc_valid = false; 6340 } 6341 } else if (link->u.mgd.p2p_noa_index != -1) { 6342 /* noa_attr not found and we had valid noa_attr before */ 6343 link->u.mgd.p2p_noa_index = -1; 6344 memset(&bss_conf->p2p_noa_attr, 0, sizeof(bss_conf->p2p_noa_attr)); 6345 changed |= BSS_CHANGED_P2P_PS; 6346 link->u.mgd.beacon_crc_valid = false; 6347 } 6348 } 6349 6350 /* 6351 * Update beacon timing and dtim count on every beacon appearance. This 6352 * will allow the driver to use the most updated values. Do it before 6353 * comparing this one with last received beacon. 6354 * IMPORTANT: These parameters would possibly be out of sync by the time 6355 * the driver will use them. The synchronized view is currently 6356 * guaranteed only in certain callbacks. 6357 */ 6358 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY) && 6359 !ieee80211_is_s1g_beacon(hdr->frame_control)) { 6360 link->conf->sync_tsf = 6361 le64_to_cpu(mgmt->u.beacon.timestamp); 6362 link->conf->sync_device_ts = 6363 rx_status->device_timestamp; 6364 link->conf->sync_dtim_count = elems->dtim_count; 6365 } 6366 6367 if ((ncrc == link->u.mgd.beacon_crc && link->u.mgd.beacon_crc_valid) || 6368 ieee80211_is_s1g_short_beacon(mgmt->frame_control)) 6369 goto free; 6370 link->u.mgd.beacon_crc = ncrc; 6371 link->u.mgd.beacon_crc_valid = true; 6372 6373 ieee80211_rx_bss_info(link, mgmt, len, rx_status); 6374 6375 ieee80211_sta_process_chanswitch(link, rx_status->mactime, 6376 rx_status->device_timestamp, 6377 elems, true); 6378 6379 if (!link->u.mgd.disable_wmm_tracking && 6380 ieee80211_sta_wmm_params(local, link, elems->wmm_param, 6381 elems->wmm_param_len, 6382 elems->mu_edca_param_set)) 6383 changed |= BSS_CHANGED_QOS; 6384 6385 /* 6386 * If we haven't had a beacon before, tell the driver about the 6387 * DTIM period (and beacon timing if desired) now. 6388 */ 6389 if (!link->u.mgd.have_beacon) { 6390 /* a few bogus AP send dtim_period = 0 or no TIM IE */ 6391 bss_conf->dtim_period = elems->dtim_period ?: 1; 6392 6393 changed |= BSS_CHANGED_BEACON_INFO; 6394 link->u.mgd.have_beacon = true; 6395 6396 ieee80211_recalc_ps(local); 6397 6398 ieee80211_recalc_ps_vif(sdata); 6399 } 6400 6401 if (elems->erp_info) { 6402 erp_valid = true; 6403 erp_value = elems->erp_info[0]; 6404 } else { 6405 erp_valid = false; 6406 } 6407 6408 if (!ieee80211_is_s1g_beacon(hdr->frame_control)) 6409 changed |= ieee80211_handle_bss_capability(link, 6410 le16_to_cpu(mgmt->u.beacon.capab_info), 6411 erp_valid, erp_value); 6412 6413 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 6414 if (WARN_ON(!sta)) { 6415 goto free; 6416 } 6417 link_sta = rcu_dereference_protected(sta->link[link->link_id], 6418 lockdep_is_held(&local->hw.wiphy->mtx)); 6419 if (WARN_ON(!link_sta)) { 6420 goto free; 6421 } 6422 6423 if (WARN_ON(!link->conf->chanreq.oper.chan)) 6424 goto free; 6425 6426 sband = local->hw.wiphy->bands[link->conf->chanreq.oper.chan->band]; 6427 6428 changed |= ieee80211_recalc_twt_req(sdata, sband, link, link_sta, elems); 6429 6430 if (ieee80211_config_bw(link, elems, true, &changed)) { 6431 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 6432 WLAN_REASON_DEAUTH_LEAVING, 6433 true, deauth_buf); 6434 ieee80211_report_disconnect(sdata, deauth_buf, 6435 sizeof(deauth_buf), true, 6436 WLAN_REASON_DEAUTH_LEAVING, 6437 false); 6438 goto free; 6439 } 6440 6441 if (elems->opmode_notif) 6442 ieee80211_vht_handle_opmode(sdata, link_sta, 6443 *elems->opmode_notif, 6444 rx_status->band); 6445 6446 changed |= ieee80211_handle_pwr_constr(link, chan, mgmt, 6447 elems->country_elem, 6448 elems->country_elem_len, 6449 elems->pwr_constr_elem, 6450 elems->cisco_dtpc_elem); 6451 6452 ieee80211_ml_reconfiguration(sdata, elems); 6453 ieee80211_process_adv_ttlm(sdata, elems, 6454 le64_to_cpu(mgmt->u.beacon.timestamp)); 6455 6456 ieee80211_link_info_change_notify(sdata, link, changed); 6457 free: 6458 kfree(elems); 6459 } 6460 6461 static void ieee80211_apply_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6462 struct ieee80211_neg_ttlm neg_ttlm) 6463 { 6464 u16 new_active_links, new_dormant_links, new_suspended_links, map = 0; 6465 u8 i; 6466 6467 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) 6468 map |= neg_ttlm.downlink[i] | neg_ttlm.uplink[i]; 6469 6470 /* If there is an active TTLM, unset previously suspended links */ 6471 if (sdata->vif.neg_ttlm.valid) 6472 sdata->vif.dormant_links &= ~sdata->vif.suspended_links; 6473 6474 /* exclude links that are already disabled by advertised TTLM */ 6475 new_active_links = 6476 map & sdata->vif.valid_links & ~sdata->vif.dormant_links; 6477 new_suspended_links = 6478 (~map & sdata->vif.valid_links) & ~sdata->vif.dormant_links; 6479 new_dormant_links = sdata->vif.dormant_links | new_suspended_links; 6480 if (ieee80211_ttlm_set_links(sdata, new_active_links, 6481 new_dormant_links, new_suspended_links)) 6482 return; 6483 6484 sdata->vif.neg_ttlm = neg_ttlm; 6485 sdata->vif.neg_ttlm.valid = true; 6486 } 6487 6488 static void ieee80211_neg_ttlm_timeout_work(struct wiphy *wiphy, 6489 struct wiphy_work *work) 6490 { 6491 struct ieee80211_sub_if_data *sdata = 6492 container_of(work, struct ieee80211_sub_if_data, 6493 u.mgd.neg_ttlm_timeout_work.work); 6494 6495 sdata_info(sdata, 6496 "No negotiated TTLM response from AP, disconnecting.\n"); 6497 6498 __ieee80211_disconnect(sdata); 6499 } 6500 6501 static void 6502 ieee80211_neg_ttlm_add_suggested_map(struct sk_buff *skb, 6503 struct ieee80211_neg_ttlm *neg_ttlm) 6504 { 6505 u8 i, direction[IEEE80211_TTLM_MAX_CNT]; 6506 6507 if (memcmp(neg_ttlm->downlink, neg_ttlm->uplink, 6508 sizeof(neg_ttlm->downlink))) { 6509 direction[0] = IEEE80211_TTLM_DIRECTION_DOWN; 6510 direction[1] = IEEE80211_TTLM_DIRECTION_UP; 6511 } else { 6512 direction[0] = IEEE80211_TTLM_DIRECTION_BOTH; 6513 } 6514 6515 for (i = 0; i < ARRAY_SIZE(direction); i++) { 6516 u8 tid, len, map_ind = 0, *len_pos, *map_ind_pos, *pos; 6517 __le16 map; 6518 6519 len = sizeof(struct ieee80211_ttlm_elem) + 1 + 1; 6520 6521 pos = skb_put(skb, len + 2); 6522 *pos++ = WLAN_EID_EXTENSION; 6523 len_pos = pos++; 6524 *pos++ = WLAN_EID_EXT_TID_TO_LINK_MAPPING; 6525 *pos++ = direction[i]; 6526 map_ind_pos = pos++; 6527 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6528 map = direction[i] == IEEE80211_TTLM_DIRECTION_UP ? 6529 cpu_to_le16(neg_ttlm->uplink[tid]) : 6530 cpu_to_le16(neg_ttlm->downlink[tid]); 6531 if (!map) 6532 continue; 6533 6534 len += 2; 6535 map_ind |= BIT(tid); 6536 skb_put_data(skb, &map, sizeof(map)); 6537 } 6538 6539 *map_ind_pos = map_ind; 6540 *len_pos = len; 6541 6542 if (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH) 6543 break; 6544 } 6545 } 6546 6547 static void 6548 ieee80211_send_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6549 struct ieee80211_neg_ttlm *neg_ttlm, 6550 u8 dialog_token) 6551 { 6552 struct ieee80211_local *local = sdata->local; 6553 struct ieee80211_mgmt *mgmt; 6554 struct sk_buff *skb; 6555 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_req); 6556 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6557 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6558 6559 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6560 if (!skb) 6561 return; 6562 6563 skb_reserve(skb, local->tx_headroom); 6564 mgmt = skb_put_zero(skb, hdr_len); 6565 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6566 IEEE80211_STYPE_ACTION); 6567 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6568 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6569 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6570 6571 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6572 mgmt->u.action.u.ttlm_req.action_code = 6573 WLAN_PROTECTED_EHT_ACTION_TTLM_REQ; 6574 mgmt->u.action.u.ttlm_req.dialog_token = dialog_token; 6575 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6576 ieee80211_tx_skb(sdata, skb); 6577 } 6578 6579 int ieee80211_req_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6580 struct cfg80211_ttlm_params *params) 6581 { 6582 struct ieee80211_neg_ttlm neg_ttlm = {}; 6583 u8 i; 6584 6585 if (!ieee80211_vif_is_mld(&sdata->vif) || 6586 !(sdata->vif.cfg.mld_capa_op & 6587 IEEE80211_MLD_CAP_OP_TID_TO_LINK_MAP_NEG_SUPP)) 6588 return -EINVAL; 6589 6590 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6591 if ((params->dlink[i] & ~sdata->vif.valid_links) || 6592 (params->ulink[i] & ~sdata->vif.valid_links)) 6593 return -EINVAL; 6594 6595 neg_ttlm.downlink[i] = params->dlink[i]; 6596 neg_ttlm.uplink[i] = params->ulink[i]; 6597 } 6598 6599 if (drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm) != 6600 NEG_TTLM_RES_ACCEPT) 6601 return -EINVAL; 6602 6603 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6604 sdata->u.mgd.dialog_token_alloc++; 6605 ieee80211_send_neg_ttlm_req(sdata, &sdata->vif.neg_ttlm, 6606 sdata->u.mgd.dialog_token_alloc); 6607 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6608 &sdata->u.mgd.neg_ttlm_timeout_work); 6609 wiphy_delayed_work_queue(sdata->local->hw.wiphy, 6610 &sdata->u.mgd.neg_ttlm_timeout_work, 6611 IEEE80211_NEG_TTLM_REQ_TIMEOUT); 6612 return 0; 6613 } 6614 6615 static void 6616 ieee80211_send_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6617 enum ieee80211_neg_ttlm_res ttlm_res, 6618 u8 dialog_token, 6619 struct ieee80211_neg_ttlm *neg_ttlm) 6620 { 6621 struct ieee80211_local *local = sdata->local; 6622 struct ieee80211_mgmt *mgmt; 6623 struct sk_buff *skb; 6624 int hdr_len = offsetofend(struct ieee80211_mgmt, u.action.u.ttlm_res); 6625 int ttlm_max_len = 2 + 1 + sizeof(struct ieee80211_ttlm_elem) + 1 + 6626 2 * 2 * IEEE80211_TTLM_NUM_TIDS; 6627 6628 skb = dev_alloc_skb(local->tx_headroom + hdr_len + ttlm_max_len); 6629 if (!skb) 6630 return; 6631 6632 skb_reserve(skb, local->tx_headroom); 6633 mgmt = skb_put_zero(skb, hdr_len); 6634 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6635 IEEE80211_STYPE_ACTION); 6636 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6637 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6638 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6639 6640 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6641 mgmt->u.action.u.ttlm_res.action_code = 6642 WLAN_PROTECTED_EHT_ACTION_TTLM_RES; 6643 mgmt->u.action.u.ttlm_res.dialog_token = dialog_token; 6644 switch (ttlm_res) { 6645 default: 6646 WARN_ON(1); 6647 fallthrough; 6648 case NEG_TTLM_RES_REJECT: 6649 mgmt->u.action.u.ttlm_res.status_code = 6650 WLAN_STATUS_DENIED_TID_TO_LINK_MAPPING; 6651 break; 6652 case NEG_TTLM_RES_ACCEPT: 6653 mgmt->u.action.u.ttlm_res.status_code = WLAN_STATUS_SUCCESS; 6654 break; 6655 case NEG_TTLM_RES_SUGGEST_PREFERRED: 6656 mgmt->u.action.u.ttlm_res.status_code = 6657 WLAN_STATUS_PREF_TID_TO_LINK_MAPPING_SUGGESTED; 6658 ieee80211_neg_ttlm_add_suggested_map(skb, neg_ttlm); 6659 break; 6660 } 6661 6662 ieee80211_tx_skb(sdata, skb); 6663 } 6664 6665 static int 6666 ieee80211_parse_neg_ttlm(struct ieee80211_sub_if_data *sdata, 6667 const struct ieee80211_ttlm_elem *ttlm, 6668 struct ieee80211_neg_ttlm *neg_ttlm, 6669 u8 *direction) 6670 { 6671 u8 control, link_map_presence, map_size, tid; 6672 u8 *pos; 6673 6674 /* The element size was already validated in 6675 * ieee80211_tid_to_link_map_size_ok() 6676 */ 6677 pos = (void *)ttlm->optional; 6678 6679 control = ttlm->control; 6680 6681 /* mapping switch time and expected duration fields are not expected 6682 * in case of negotiated TTLM 6683 */ 6684 if (control & (IEEE80211_TTLM_CONTROL_SWITCH_TIME_PRESENT | 6685 IEEE80211_TTLM_CONTROL_EXPECTED_DUR_PRESENT)) { 6686 mlme_dbg(sdata, 6687 "Invalid TTLM element in negotiated TTLM request\n"); 6688 return -EINVAL; 6689 } 6690 6691 if (control & IEEE80211_TTLM_CONTROL_DEF_LINK_MAP) { 6692 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6693 neg_ttlm->downlink[tid] = sdata->vif.valid_links; 6694 neg_ttlm->uplink[tid] = sdata->vif.valid_links; 6695 } 6696 *direction = IEEE80211_TTLM_DIRECTION_BOTH; 6697 return 0; 6698 } 6699 6700 *direction = u8_get_bits(control, IEEE80211_TTLM_CONTROL_DIRECTION); 6701 if (*direction != IEEE80211_TTLM_DIRECTION_DOWN && 6702 *direction != IEEE80211_TTLM_DIRECTION_UP && 6703 *direction != IEEE80211_TTLM_DIRECTION_BOTH) 6704 return -EINVAL; 6705 6706 link_map_presence = *pos; 6707 pos++; 6708 6709 if (control & IEEE80211_TTLM_CONTROL_LINK_MAP_SIZE) 6710 map_size = 1; 6711 else 6712 map_size = 2; 6713 6714 for (tid = 0; tid < IEEE80211_TTLM_NUM_TIDS; tid++) { 6715 u16 map; 6716 6717 if (link_map_presence & BIT(tid)) { 6718 map = ieee80211_get_ttlm(map_size, pos); 6719 if (!map) { 6720 mlme_dbg(sdata, 6721 "No active links for TID %d", tid); 6722 return -EINVAL; 6723 } 6724 } else { 6725 map = 0; 6726 } 6727 6728 switch (*direction) { 6729 case IEEE80211_TTLM_DIRECTION_BOTH: 6730 neg_ttlm->downlink[tid] = map; 6731 neg_ttlm->uplink[tid] = map; 6732 break; 6733 case IEEE80211_TTLM_DIRECTION_DOWN: 6734 neg_ttlm->downlink[tid] = map; 6735 break; 6736 case IEEE80211_TTLM_DIRECTION_UP: 6737 neg_ttlm->uplink[tid] = map; 6738 break; 6739 default: 6740 return -EINVAL; 6741 } 6742 pos += map_size; 6743 } 6744 return 0; 6745 } 6746 6747 void ieee80211_process_neg_ttlm_req(struct ieee80211_sub_if_data *sdata, 6748 struct ieee80211_mgmt *mgmt, size_t len) 6749 { 6750 u8 dialog_token, direction[IEEE80211_TTLM_MAX_CNT] = {}, i; 6751 size_t ies_len; 6752 enum ieee80211_neg_ttlm_res ttlm_res = NEG_TTLM_RES_ACCEPT; 6753 struct ieee802_11_elems *elems = NULL; 6754 struct ieee80211_neg_ttlm neg_ttlm = {}; 6755 6756 BUILD_BUG_ON(ARRAY_SIZE(direction) != ARRAY_SIZE(elems->ttlm)); 6757 6758 if (!ieee80211_vif_is_mld(&sdata->vif)) 6759 return; 6760 6761 dialog_token = mgmt->u.action.u.ttlm_req.dialog_token; 6762 ies_len = len - offsetof(struct ieee80211_mgmt, 6763 u.action.u.ttlm_req.variable); 6764 elems = ieee802_11_parse_elems(mgmt->u.action.u.ttlm_req.variable, 6765 ies_len, true, NULL); 6766 if (!elems) { 6767 ttlm_res = NEG_TTLM_RES_REJECT; 6768 goto out; 6769 } 6770 6771 for (i = 0; i < elems->ttlm_num; i++) { 6772 if (ieee80211_parse_neg_ttlm(sdata, elems->ttlm[i], 6773 &neg_ttlm, &direction[i]) || 6774 (direction[i] == IEEE80211_TTLM_DIRECTION_BOTH && 6775 elems->ttlm_num != 1)) { 6776 ttlm_res = NEG_TTLM_RES_REJECT; 6777 goto out; 6778 } 6779 } 6780 6781 if (!elems->ttlm_num || 6782 (elems->ttlm_num == 2 && direction[0] == direction[1])) { 6783 ttlm_res = NEG_TTLM_RES_REJECT; 6784 goto out; 6785 } 6786 6787 for (i = 0; i < IEEE80211_TTLM_NUM_TIDS; i++) { 6788 if ((neg_ttlm.downlink[i] && 6789 (neg_ttlm.downlink[i] & ~sdata->vif.valid_links)) || 6790 (neg_ttlm.uplink[i] && 6791 (neg_ttlm.uplink[i] & ~sdata->vif.valid_links))) { 6792 ttlm_res = NEG_TTLM_RES_REJECT; 6793 goto out; 6794 } 6795 } 6796 6797 ttlm_res = drv_can_neg_ttlm(sdata->local, sdata, &neg_ttlm); 6798 6799 if (ttlm_res != NEG_TTLM_RES_ACCEPT) 6800 goto out; 6801 6802 ieee80211_apply_neg_ttlm(sdata, neg_ttlm); 6803 out: 6804 kfree(elems); 6805 ieee80211_send_neg_ttlm_res(sdata, ttlm_res, dialog_token, &neg_ttlm); 6806 } 6807 6808 void ieee80211_process_neg_ttlm_res(struct ieee80211_sub_if_data *sdata, 6809 struct ieee80211_mgmt *mgmt, size_t len) 6810 { 6811 if (!ieee80211_vif_is_mld(&sdata->vif) || 6812 mgmt->u.action.u.ttlm_req.dialog_token != 6813 sdata->u.mgd.dialog_token_alloc) 6814 return; 6815 6816 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 6817 &sdata->u.mgd.neg_ttlm_timeout_work); 6818 6819 /* MLD station sends a TID to link mapping request, mainly to handle 6820 * BTM (BSS transition management) request, in which case it needs to 6821 * restrict the active links set. 6822 * In this case it's not expected that the MLD AP will reject the 6823 * negotiated TTLM request. 6824 * This can be better implemented in the future, to handle request 6825 * rejections. 6826 */ 6827 if (mgmt->u.action.u.ttlm_res.status_code != WLAN_STATUS_SUCCESS) 6828 __ieee80211_disconnect(sdata); 6829 } 6830 6831 static void ieee80211_teardown_ttlm_work(struct wiphy *wiphy, 6832 struct wiphy_work *work) 6833 { 6834 u16 new_dormant_links; 6835 struct ieee80211_sub_if_data *sdata = 6836 container_of(work, struct ieee80211_sub_if_data, 6837 u.mgd.neg_ttlm_timeout_work.work); 6838 6839 if (!sdata->vif.neg_ttlm.valid) 6840 return; 6841 6842 memset(&sdata->vif.neg_ttlm, 0, sizeof(sdata->vif.neg_ttlm)); 6843 new_dormant_links = 6844 sdata->vif.dormant_links & ~sdata->vif.suspended_links; 6845 sdata->vif.suspended_links = 0; 6846 ieee80211_vif_set_links(sdata, sdata->vif.valid_links, 6847 new_dormant_links); 6848 ieee80211_vif_cfg_change_notify(sdata, BSS_CHANGED_MLD_TTLM | 6849 BSS_CHANGED_MLD_VALID_LINKS); 6850 } 6851 6852 void ieee80211_send_teardown_neg_ttlm(struct ieee80211_vif *vif) 6853 { 6854 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 6855 struct ieee80211_local *local = sdata->local; 6856 struct ieee80211_mgmt *mgmt; 6857 struct sk_buff *skb; 6858 int frame_len = offsetofend(struct ieee80211_mgmt, 6859 u.action.u.ttlm_tear_down); 6860 struct ieee80211_tx_info *info; 6861 6862 skb = dev_alloc_skb(local->hw.extra_tx_headroom + frame_len); 6863 if (!skb) 6864 return; 6865 6866 skb_reserve(skb, local->hw.extra_tx_headroom); 6867 mgmt = skb_put_zero(skb, frame_len); 6868 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | 6869 IEEE80211_STYPE_ACTION); 6870 memcpy(mgmt->da, sdata->vif.cfg.ap_addr, ETH_ALEN); 6871 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN); 6872 memcpy(mgmt->bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 6873 6874 mgmt->u.action.category = WLAN_CATEGORY_PROTECTED_EHT; 6875 mgmt->u.action.u.ttlm_tear_down.action_code = 6876 WLAN_PROTECTED_EHT_ACTION_TTLM_TEARDOWN; 6877 6878 info = IEEE80211_SKB_CB(skb); 6879 info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS; 6880 info->status_data = IEEE80211_STATUS_TYPE_NEG_TTLM; 6881 ieee80211_tx_skb(sdata, skb); 6882 } 6883 EXPORT_SYMBOL(ieee80211_send_teardown_neg_ttlm); 6884 6885 void ieee80211_sta_rx_queued_ext(struct ieee80211_sub_if_data *sdata, 6886 struct sk_buff *skb) 6887 { 6888 struct ieee80211_link_data *link = &sdata->deflink; 6889 struct ieee80211_rx_status *rx_status; 6890 struct ieee80211_hdr *hdr; 6891 u16 fc; 6892 6893 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6894 6895 rx_status = (struct ieee80211_rx_status *) skb->cb; 6896 hdr = (struct ieee80211_hdr *) skb->data; 6897 fc = le16_to_cpu(hdr->frame_control); 6898 6899 switch (fc & IEEE80211_FCTL_STYPE) { 6900 case IEEE80211_STYPE_S1G_BEACON: 6901 ieee80211_rx_mgmt_beacon(link, hdr, skb->len, rx_status); 6902 break; 6903 } 6904 } 6905 6906 void ieee80211_sta_rx_queued_mgmt(struct ieee80211_sub_if_data *sdata, 6907 struct sk_buff *skb) 6908 { 6909 struct ieee80211_link_data *link = &sdata->deflink; 6910 struct ieee80211_rx_status *rx_status; 6911 struct ieee80211_mgmt *mgmt; 6912 u16 fc; 6913 int ies_len; 6914 6915 lockdep_assert_wiphy(sdata->local->hw.wiphy); 6916 6917 rx_status = (struct ieee80211_rx_status *) skb->cb; 6918 mgmt = (struct ieee80211_mgmt *) skb->data; 6919 fc = le16_to_cpu(mgmt->frame_control); 6920 6921 if (rx_status->link_valid) { 6922 link = sdata_dereference(sdata->link[rx_status->link_id], 6923 sdata); 6924 if (!link) 6925 return; 6926 } 6927 6928 switch (fc & IEEE80211_FCTL_STYPE) { 6929 case IEEE80211_STYPE_BEACON: 6930 ieee80211_rx_mgmt_beacon(link, (void *)mgmt, 6931 skb->len, rx_status); 6932 break; 6933 case IEEE80211_STYPE_PROBE_RESP: 6934 ieee80211_rx_mgmt_probe_resp(link, skb); 6935 break; 6936 case IEEE80211_STYPE_AUTH: 6937 ieee80211_rx_mgmt_auth(sdata, mgmt, skb->len); 6938 break; 6939 case IEEE80211_STYPE_DEAUTH: 6940 ieee80211_rx_mgmt_deauth(sdata, mgmt, skb->len); 6941 break; 6942 case IEEE80211_STYPE_DISASSOC: 6943 ieee80211_rx_mgmt_disassoc(sdata, mgmt, skb->len); 6944 break; 6945 case IEEE80211_STYPE_ASSOC_RESP: 6946 case IEEE80211_STYPE_REASSOC_RESP: 6947 ieee80211_rx_mgmt_assoc_resp(sdata, mgmt, skb->len); 6948 break; 6949 case IEEE80211_STYPE_ACTION: 6950 if (!sdata->u.mgd.associated || 6951 !ether_addr_equal(mgmt->bssid, sdata->vif.cfg.ap_addr)) 6952 break; 6953 6954 if (mgmt->u.action.category == WLAN_CATEGORY_SPECTRUM_MGMT) { 6955 struct ieee802_11_elems *elems; 6956 6957 ies_len = skb->len - 6958 offsetof(struct ieee80211_mgmt, 6959 u.action.u.chan_switch.variable); 6960 6961 if (ies_len < 0) 6962 break; 6963 6964 /* CSA IE cannot be overridden, no need for BSSID */ 6965 elems = ieee802_11_parse_elems( 6966 mgmt->u.action.u.chan_switch.variable, 6967 ies_len, true, NULL); 6968 6969 if (elems && !elems->parse_error) 6970 ieee80211_sta_process_chanswitch(link, 6971 rx_status->mactime, 6972 rx_status->device_timestamp, 6973 elems, false); 6974 kfree(elems); 6975 } else if (mgmt->u.action.category == WLAN_CATEGORY_PUBLIC) { 6976 struct ieee802_11_elems *elems; 6977 6978 ies_len = skb->len - 6979 offsetof(struct ieee80211_mgmt, 6980 u.action.u.ext_chan_switch.variable); 6981 6982 if (ies_len < 0) 6983 break; 6984 6985 /* 6986 * extended CSA IE can't be overridden, no need for 6987 * BSSID 6988 */ 6989 elems = ieee802_11_parse_elems( 6990 mgmt->u.action.u.ext_chan_switch.variable, 6991 ies_len, true, NULL); 6992 6993 if (elems && !elems->parse_error) { 6994 /* for the handling code pretend it was an IE */ 6995 elems->ext_chansw_ie = 6996 &mgmt->u.action.u.ext_chan_switch.data; 6997 6998 ieee80211_sta_process_chanswitch(link, 6999 rx_status->mactime, 7000 rx_status->device_timestamp, 7001 elems, false); 7002 } 7003 7004 kfree(elems); 7005 } 7006 break; 7007 } 7008 } 7009 7010 static void ieee80211_sta_timer(struct timer_list *t) 7011 { 7012 struct ieee80211_sub_if_data *sdata = 7013 from_timer(sdata, t, u.mgd.timer); 7014 7015 wiphy_work_queue(sdata->local->hw.wiphy, &sdata->work); 7016 } 7017 7018 void ieee80211_sta_connection_lost(struct ieee80211_sub_if_data *sdata, 7019 u8 reason, bool tx) 7020 { 7021 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7022 7023 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, reason, 7024 tx, frame_buf); 7025 7026 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 7027 reason, false); 7028 } 7029 7030 static int ieee80211_auth(struct ieee80211_sub_if_data *sdata) 7031 { 7032 struct ieee80211_local *local = sdata->local; 7033 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7034 struct ieee80211_mgd_auth_data *auth_data = ifmgd->auth_data; 7035 u32 tx_flags = 0; 7036 u16 trans = 1; 7037 u16 status = 0; 7038 struct ieee80211_prep_tx_info info = { 7039 .subtype = IEEE80211_STYPE_AUTH, 7040 }; 7041 7042 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7043 7044 if (WARN_ON_ONCE(!auth_data)) 7045 return -EINVAL; 7046 7047 auth_data->tries++; 7048 7049 if (auth_data->tries > IEEE80211_AUTH_MAX_TRIES) { 7050 sdata_info(sdata, "authentication with %pM timed out\n", 7051 auth_data->ap_addr); 7052 7053 /* 7054 * Most likely AP is not in the range so remove the 7055 * bss struct for that AP. 7056 */ 7057 cfg80211_unlink_bss(local->hw.wiphy, auth_data->bss); 7058 7059 return -ETIMEDOUT; 7060 } 7061 7062 if (auth_data->algorithm == WLAN_AUTH_SAE) 7063 info.duration = jiffies_to_msecs(IEEE80211_AUTH_TIMEOUT_SAE); 7064 7065 info.link_id = auth_data->link_id; 7066 drv_mgd_prepare_tx(local, sdata, &info); 7067 7068 sdata_info(sdata, "send auth to %pM (try %d/%d)\n", 7069 auth_data->ap_addr, auth_data->tries, 7070 IEEE80211_AUTH_MAX_TRIES); 7071 7072 auth_data->expected_transaction = 2; 7073 7074 if (auth_data->algorithm == WLAN_AUTH_SAE) { 7075 trans = auth_data->sae_trans; 7076 status = auth_data->sae_status; 7077 auth_data->expected_transaction = trans; 7078 } 7079 7080 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7081 tx_flags = IEEE80211_TX_CTL_REQ_TX_STATUS | 7082 IEEE80211_TX_INTFL_MLME_CONN_TX; 7083 7084 ieee80211_send_auth(sdata, trans, auth_data->algorithm, status, 7085 auth_data->data, auth_data->data_len, 7086 auth_data->ap_addr, auth_data->ap_addr, 7087 NULL, 0, 0, tx_flags); 7088 7089 if (tx_flags == 0) { 7090 if (auth_data->algorithm == WLAN_AUTH_SAE) 7091 auth_data->timeout = jiffies + 7092 IEEE80211_AUTH_TIMEOUT_SAE; 7093 else 7094 auth_data->timeout = jiffies + IEEE80211_AUTH_TIMEOUT; 7095 } else { 7096 auth_data->timeout = 7097 round_jiffies_up(jiffies + IEEE80211_AUTH_TIMEOUT_LONG); 7098 } 7099 7100 auth_data->timeout_started = true; 7101 run_again(sdata, auth_data->timeout); 7102 7103 return 0; 7104 } 7105 7106 static int ieee80211_do_assoc(struct ieee80211_sub_if_data *sdata) 7107 { 7108 struct ieee80211_mgd_assoc_data *assoc_data = sdata->u.mgd.assoc_data; 7109 struct ieee80211_local *local = sdata->local; 7110 int ret; 7111 7112 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7113 7114 assoc_data->tries++; 7115 if (assoc_data->tries > IEEE80211_ASSOC_MAX_TRIES) { 7116 sdata_info(sdata, "association with %pM timed out\n", 7117 assoc_data->ap_addr); 7118 7119 /* 7120 * Most likely AP is not in the range so remove the 7121 * bss struct for that AP. 7122 */ 7123 cfg80211_unlink_bss(local->hw.wiphy, 7124 assoc_data->link[assoc_data->assoc_link_id].bss); 7125 7126 return -ETIMEDOUT; 7127 } 7128 7129 sdata_info(sdata, "associate with %pM (try %d/%d)\n", 7130 assoc_data->ap_addr, assoc_data->tries, 7131 IEEE80211_ASSOC_MAX_TRIES); 7132 ret = ieee80211_send_assoc(sdata); 7133 if (ret) 7134 return ret; 7135 7136 if (!ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7137 assoc_data->timeout = jiffies + IEEE80211_ASSOC_TIMEOUT; 7138 assoc_data->timeout_started = true; 7139 run_again(sdata, assoc_data->timeout); 7140 } else { 7141 assoc_data->timeout = 7142 round_jiffies_up(jiffies + 7143 IEEE80211_ASSOC_TIMEOUT_LONG); 7144 assoc_data->timeout_started = true; 7145 run_again(sdata, assoc_data->timeout); 7146 } 7147 7148 return 0; 7149 } 7150 7151 void ieee80211_mgd_conn_tx_status(struct ieee80211_sub_if_data *sdata, 7152 __le16 fc, bool acked) 7153 { 7154 struct ieee80211_local *local = sdata->local; 7155 7156 sdata->u.mgd.status_fc = fc; 7157 sdata->u.mgd.status_acked = acked; 7158 sdata->u.mgd.status_received = true; 7159 7160 wiphy_work_queue(local->hw.wiphy, &sdata->work); 7161 } 7162 7163 void ieee80211_sta_work(struct ieee80211_sub_if_data *sdata) 7164 { 7165 struct ieee80211_local *local = sdata->local; 7166 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7167 7168 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7169 7170 if (ifmgd->status_received) { 7171 __le16 fc = ifmgd->status_fc; 7172 bool status_acked = ifmgd->status_acked; 7173 7174 ifmgd->status_received = false; 7175 if (ifmgd->auth_data && ieee80211_is_auth(fc)) { 7176 if (status_acked) { 7177 if (ifmgd->auth_data->algorithm == 7178 WLAN_AUTH_SAE) 7179 ifmgd->auth_data->timeout = 7180 jiffies + 7181 IEEE80211_AUTH_TIMEOUT_SAE; 7182 else 7183 ifmgd->auth_data->timeout = 7184 jiffies + 7185 IEEE80211_AUTH_TIMEOUT_SHORT; 7186 run_again(sdata, ifmgd->auth_data->timeout); 7187 } else { 7188 ifmgd->auth_data->timeout = jiffies - 1; 7189 } 7190 ifmgd->auth_data->timeout_started = true; 7191 } else if (ifmgd->assoc_data && 7192 !ifmgd->assoc_data->comeback && 7193 (ieee80211_is_assoc_req(fc) || 7194 ieee80211_is_reassoc_req(fc))) { 7195 /* 7196 * Update association timeout based on the TX status 7197 * for the (Re)Association Request frame. Skip this if 7198 * we have already processed a (Re)Association Response 7199 * frame that indicated need for association comeback 7200 * at a specific time in the future. This could happen 7201 * if the TX status information is delayed enough for 7202 * the response to be received and processed first. 7203 */ 7204 if (status_acked) { 7205 ifmgd->assoc_data->timeout = 7206 jiffies + IEEE80211_ASSOC_TIMEOUT_SHORT; 7207 run_again(sdata, ifmgd->assoc_data->timeout); 7208 } else { 7209 ifmgd->assoc_data->timeout = jiffies - 1; 7210 } 7211 ifmgd->assoc_data->timeout_started = true; 7212 } 7213 } 7214 7215 if (ifmgd->auth_data && ifmgd->auth_data->timeout_started && 7216 time_after(jiffies, ifmgd->auth_data->timeout)) { 7217 if (ifmgd->auth_data->done || ifmgd->auth_data->waiting) { 7218 /* 7219 * ok ... we waited for assoc or continuation but 7220 * userspace didn't do it, so kill the auth data 7221 */ 7222 ieee80211_destroy_auth_data(sdata, false); 7223 } else if (ieee80211_auth(sdata)) { 7224 u8 ap_addr[ETH_ALEN]; 7225 struct ieee80211_event event = { 7226 .type = MLME_EVENT, 7227 .u.mlme.data = AUTH_EVENT, 7228 .u.mlme.status = MLME_TIMEOUT, 7229 }; 7230 7231 memcpy(ap_addr, ifmgd->auth_data->ap_addr, ETH_ALEN); 7232 7233 ieee80211_destroy_auth_data(sdata, false); 7234 7235 cfg80211_auth_timeout(sdata->dev, ap_addr); 7236 drv_event_callback(sdata->local, sdata, &event); 7237 } 7238 } else if (ifmgd->auth_data && ifmgd->auth_data->timeout_started) 7239 run_again(sdata, ifmgd->auth_data->timeout); 7240 7241 if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started && 7242 time_after(jiffies, ifmgd->assoc_data->timeout)) { 7243 if ((ifmgd->assoc_data->need_beacon && 7244 !sdata->deflink.u.mgd.have_beacon) || 7245 ieee80211_do_assoc(sdata)) { 7246 struct ieee80211_event event = { 7247 .type = MLME_EVENT, 7248 .u.mlme.data = ASSOC_EVENT, 7249 .u.mlme.status = MLME_TIMEOUT, 7250 }; 7251 7252 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 7253 drv_event_callback(sdata->local, sdata, &event); 7254 } 7255 } else if (ifmgd->assoc_data && ifmgd->assoc_data->timeout_started) 7256 run_again(sdata, ifmgd->assoc_data->timeout); 7257 7258 if (ifmgd->flags & IEEE80211_STA_CONNECTION_POLL && 7259 ifmgd->associated) { 7260 u8 *bssid = sdata->deflink.u.mgd.bssid; 7261 int max_tries; 7262 7263 if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) 7264 max_tries = max_nullfunc_tries; 7265 else 7266 max_tries = max_probe_tries; 7267 7268 /* ACK received for nullfunc probing frame */ 7269 if (!ifmgd->probe_send_count) 7270 ieee80211_reset_ap_probe(sdata); 7271 else if (ifmgd->nullfunc_failed) { 7272 if (ifmgd->probe_send_count < max_tries) { 7273 mlme_dbg(sdata, 7274 "No ack for nullfunc frame to AP %pM, try %d/%i\n", 7275 bssid, ifmgd->probe_send_count, 7276 max_tries); 7277 ieee80211_mgd_probe_ap_send(sdata); 7278 } else { 7279 mlme_dbg(sdata, 7280 "No ack for nullfunc frame to AP %pM, disconnecting.\n", 7281 bssid); 7282 ieee80211_sta_connection_lost(sdata, 7283 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, 7284 false); 7285 } 7286 } else if (time_is_after_jiffies(ifmgd->probe_timeout)) 7287 run_again(sdata, ifmgd->probe_timeout); 7288 else if (ieee80211_hw_check(&local->hw, REPORTS_TX_ACK_STATUS)) { 7289 mlme_dbg(sdata, 7290 "Failed to send nullfunc to AP %pM after %dms, disconnecting\n", 7291 bssid, probe_wait_ms); 7292 ieee80211_sta_connection_lost(sdata, 7293 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7294 } else if (ifmgd->probe_send_count < max_tries) { 7295 mlme_dbg(sdata, 7296 "No probe response from AP %pM after %dms, try %d/%i\n", 7297 bssid, probe_wait_ms, 7298 ifmgd->probe_send_count, max_tries); 7299 ieee80211_mgd_probe_ap_send(sdata); 7300 } else { 7301 /* 7302 * We actually lost the connection ... or did we? 7303 * Let's make sure! 7304 */ 7305 mlme_dbg(sdata, 7306 "No probe response from AP %pM after %dms, disconnecting.\n", 7307 bssid, probe_wait_ms); 7308 7309 ieee80211_sta_connection_lost(sdata, 7310 WLAN_REASON_DISASSOC_DUE_TO_INACTIVITY, false); 7311 } 7312 } 7313 } 7314 7315 static void ieee80211_sta_bcn_mon_timer(struct timer_list *t) 7316 { 7317 struct ieee80211_sub_if_data *sdata = 7318 from_timer(sdata, t, u.mgd.bcn_mon_timer); 7319 7320 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7321 return; 7322 7323 if (sdata->vif.bss_conf.csa_active && 7324 !sdata->deflink.u.mgd.csa_waiting_bcn) 7325 return; 7326 7327 if (sdata->vif.driver_flags & IEEE80211_VIF_BEACON_FILTER) 7328 return; 7329 7330 sdata->u.mgd.connection_loss = false; 7331 wiphy_work_queue(sdata->local->hw.wiphy, 7332 &sdata->u.mgd.beacon_connection_loss_work); 7333 } 7334 7335 static void ieee80211_sta_conn_mon_timer(struct timer_list *t) 7336 { 7337 struct ieee80211_sub_if_data *sdata = 7338 from_timer(sdata, t, u.mgd.conn_mon_timer); 7339 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7340 struct ieee80211_local *local = sdata->local; 7341 struct sta_info *sta; 7342 unsigned long timeout; 7343 7344 if (WARN_ON(ieee80211_vif_is_mld(&sdata->vif))) 7345 return; 7346 7347 if (sdata->vif.bss_conf.csa_active && 7348 !sdata->deflink.u.mgd.csa_waiting_bcn) 7349 return; 7350 7351 sta = sta_info_get(sdata, sdata->vif.cfg.ap_addr); 7352 if (!sta) 7353 return; 7354 7355 timeout = sta->deflink.status_stats.last_ack; 7356 if (time_before(sta->deflink.status_stats.last_ack, sta->deflink.rx_stats.last_rx)) 7357 timeout = sta->deflink.rx_stats.last_rx; 7358 timeout += IEEE80211_CONNECTION_IDLE_TIME; 7359 7360 /* If timeout is after now, then update timer to fire at 7361 * the later date, but do not actually probe at this time. 7362 */ 7363 if (time_is_after_jiffies(timeout)) { 7364 mod_timer(&ifmgd->conn_mon_timer, round_jiffies_up(timeout)); 7365 return; 7366 } 7367 7368 wiphy_work_queue(local->hw.wiphy, &sdata->u.mgd.monitor_work); 7369 } 7370 7371 static void ieee80211_sta_monitor_work(struct wiphy *wiphy, 7372 struct wiphy_work *work) 7373 { 7374 struct ieee80211_sub_if_data *sdata = 7375 container_of(work, struct ieee80211_sub_if_data, 7376 u.mgd.monitor_work); 7377 7378 ieee80211_mgd_probe_ap(sdata, false); 7379 } 7380 7381 static void ieee80211_restart_sta_timer(struct ieee80211_sub_if_data *sdata) 7382 { 7383 if (sdata->vif.type == NL80211_IFTYPE_STATION) { 7384 __ieee80211_stop_poll(sdata); 7385 7386 /* let's probe the connection once */ 7387 if (!ieee80211_hw_check(&sdata->local->hw, CONNECTION_MONITOR)) 7388 wiphy_work_queue(sdata->local->hw.wiphy, 7389 &sdata->u.mgd.monitor_work); 7390 } 7391 } 7392 7393 #ifdef CONFIG_PM 7394 void ieee80211_mgd_quiesce(struct ieee80211_sub_if_data *sdata) 7395 { 7396 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7397 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7398 7399 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7400 7401 if (ifmgd->auth_data || ifmgd->assoc_data) { 7402 const u8 *ap_addr = ifmgd->auth_data ? 7403 ifmgd->auth_data->ap_addr : 7404 ifmgd->assoc_data->ap_addr; 7405 7406 /* 7407 * If we are trying to authenticate / associate while suspending, 7408 * cfg80211 won't know and won't actually abort those attempts, 7409 * thus we need to do that ourselves. 7410 */ 7411 ieee80211_send_deauth_disassoc(sdata, ap_addr, ap_addr, 7412 IEEE80211_STYPE_DEAUTH, 7413 WLAN_REASON_DEAUTH_LEAVING, 7414 false, frame_buf); 7415 if (ifmgd->assoc_data) 7416 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 7417 if (ifmgd->auth_data) 7418 ieee80211_destroy_auth_data(sdata, false); 7419 cfg80211_tx_mlme_mgmt(sdata->dev, frame_buf, 7420 IEEE80211_DEAUTH_FRAME_LEN, 7421 false); 7422 } 7423 7424 /* This is a bit of a hack - we should find a better and more generic 7425 * solution to this. Normally when suspending, cfg80211 will in fact 7426 * deauthenticate. However, it doesn't (and cannot) stop an ongoing 7427 * auth (not so important) or assoc (this is the problem) process. 7428 * 7429 * As a consequence, it can happen that we are in the process of both 7430 * associating and suspending, and receive an association response 7431 * after cfg80211 has checked if it needs to disconnect, but before 7432 * we actually set the flag to drop incoming frames. This will then 7433 * cause the workqueue flush to process the association response in 7434 * the suspend, resulting in a successful association just before it 7435 * tries to remove the interface from the driver, which now though 7436 * has a channel context assigned ... this results in issues. 7437 * 7438 * To work around this (for now) simply deauth here again if we're 7439 * now connected. 7440 */ 7441 if (ifmgd->associated && !sdata->local->wowlan) { 7442 u8 bssid[ETH_ALEN]; 7443 struct cfg80211_deauth_request req = { 7444 .reason_code = WLAN_REASON_DEAUTH_LEAVING, 7445 .bssid = bssid, 7446 }; 7447 7448 memcpy(bssid, sdata->vif.cfg.ap_addr, ETH_ALEN); 7449 ieee80211_mgd_deauth(sdata, &req); 7450 } 7451 } 7452 #endif 7453 7454 void ieee80211_sta_restart(struct ieee80211_sub_if_data *sdata) 7455 { 7456 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7457 7458 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7459 7460 if (!ifmgd->associated) 7461 return; 7462 7463 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_RESUME) { 7464 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_RESUME; 7465 mlme_dbg(sdata, "driver requested disconnect after resume\n"); 7466 ieee80211_sta_connection_lost(sdata, 7467 WLAN_REASON_UNSPECIFIED, 7468 true); 7469 return; 7470 } 7471 7472 if (sdata->flags & IEEE80211_SDATA_DISCONNECT_HW_RESTART) { 7473 sdata->flags &= ~IEEE80211_SDATA_DISCONNECT_HW_RESTART; 7474 mlme_dbg(sdata, "driver requested disconnect after hardware restart\n"); 7475 ieee80211_sta_connection_lost(sdata, 7476 WLAN_REASON_UNSPECIFIED, 7477 true); 7478 return; 7479 } 7480 } 7481 7482 static void ieee80211_request_smps_mgd_work(struct wiphy *wiphy, 7483 struct wiphy_work *work) 7484 { 7485 struct ieee80211_link_data *link = 7486 container_of(work, struct ieee80211_link_data, 7487 u.mgd.request_smps_work); 7488 7489 __ieee80211_request_smps_mgd(link->sdata, link, 7490 link->u.mgd.driver_smps_mode); 7491 } 7492 7493 /* interface setup */ 7494 void ieee80211_sta_setup_sdata(struct ieee80211_sub_if_data *sdata) 7495 { 7496 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7497 7498 wiphy_work_init(&ifmgd->monitor_work, ieee80211_sta_monitor_work); 7499 wiphy_work_init(&ifmgd->beacon_connection_loss_work, 7500 ieee80211_beacon_connection_loss_work); 7501 wiphy_work_init(&ifmgd->csa_connection_drop_work, 7502 ieee80211_csa_connection_drop_work); 7503 wiphy_delayed_work_init(&ifmgd->tdls_peer_del_work, 7504 ieee80211_tdls_peer_del_work); 7505 wiphy_delayed_work_init(&ifmgd->ml_reconf_work, 7506 ieee80211_ml_reconf_work); 7507 timer_setup(&ifmgd->timer, ieee80211_sta_timer, 0); 7508 timer_setup(&ifmgd->bcn_mon_timer, ieee80211_sta_bcn_mon_timer, 0); 7509 timer_setup(&ifmgd->conn_mon_timer, ieee80211_sta_conn_mon_timer, 0); 7510 wiphy_delayed_work_init(&ifmgd->tx_tspec_wk, 7511 ieee80211_sta_handle_tspec_ac_params_wk); 7512 wiphy_delayed_work_init(&ifmgd->ttlm_work, 7513 ieee80211_tid_to_link_map_work); 7514 wiphy_delayed_work_init(&ifmgd->neg_ttlm_timeout_work, 7515 ieee80211_neg_ttlm_timeout_work); 7516 wiphy_work_init(&ifmgd->teardown_ttlm_work, 7517 ieee80211_teardown_ttlm_work); 7518 7519 ifmgd->flags = 0; 7520 ifmgd->powersave = sdata->wdev.ps; 7521 ifmgd->uapsd_queues = sdata->local->hw.uapsd_queues; 7522 ifmgd->uapsd_max_sp_len = sdata->local->hw.uapsd_max_sp_len; 7523 /* Setup TDLS data */ 7524 spin_lock_init(&ifmgd->teardown_lock); 7525 ifmgd->teardown_skb = NULL; 7526 ifmgd->orig_teardown_skb = NULL; 7527 ifmgd->mcast_seq_last = IEEE80211_SN_MODULO; 7528 } 7529 7530 static void ieee80211_recalc_smps_work(struct wiphy *wiphy, 7531 struct wiphy_work *work) 7532 { 7533 struct ieee80211_link_data *link = 7534 container_of(work, struct ieee80211_link_data, 7535 u.mgd.recalc_smps); 7536 7537 ieee80211_recalc_smps(link->sdata, link); 7538 } 7539 7540 void ieee80211_mgd_setup_link(struct ieee80211_link_data *link) 7541 { 7542 struct ieee80211_sub_if_data *sdata = link->sdata; 7543 struct ieee80211_local *local = sdata->local; 7544 unsigned int link_id = link->link_id; 7545 7546 link->u.mgd.p2p_noa_index = -1; 7547 link->conf->bssid = link->u.mgd.bssid; 7548 link->smps_mode = IEEE80211_SMPS_OFF; 7549 7550 wiphy_work_init(&link->u.mgd.request_smps_work, 7551 ieee80211_request_smps_mgd_work); 7552 wiphy_work_init(&link->u.mgd.recalc_smps, 7553 ieee80211_recalc_smps_work); 7554 if (local->hw.wiphy->features & NL80211_FEATURE_DYNAMIC_SMPS) 7555 link->u.mgd.req_smps = IEEE80211_SMPS_AUTOMATIC; 7556 else 7557 link->u.mgd.req_smps = IEEE80211_SMPS_OFF; 7558 7559 wiphy_delayed_work_init(&link->u.mgd.chswitch_work, 7560 ieee80211_chswitch_work); 7561 7562 if (sdata->u.mgd.assoc_data) 7563 ether_addr_copy(link->conf->addr, 7564 sdata->u.mgd.assoc_data->link[link_id].addr); 7565 else if (!is_valid_ether_addr(link->conf->addr)) 7566 eth_random_addr(link->conf->addr); 7567 } 7568 7569 /* scan finished notification */ 7570 void ieee80211_mlme_notify_scan_completed(struct ieee80211_local *local) 7571 { 7572 struct ieee80211_sub_if_data *sdata; 7573 7574 /* Restart STA timers */ 7575 rcu_read_lock(); 7576 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 7577 if (ieee80211_sdata_running(sdata)) 7578 ieee80211_restart_sta_timer(sdata); 7579 } 7580 rcu_read_unlock(); 7581 } 7582 7583 static int ieee80211_prep_connection(struct ieee80211_sub_if_data *sdata, 7584 struct cfg80211_bss *cbss, s8 link_id, 7585 const u8 *ap_mld_addr, bool assoc, 7586 struct ieee80211_conn_settings *conn, 7587 bool override) 7588 { 7589 struct ieee80211_local *local = sdata->local; 7590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7591 struct ieee80211_bss *bss = (void *)cbss->priv; 7592 struct sta_info *new_sta = NULL; 7593 struct ieee80211_link_data *link; 7594 bool have_sta = false; 7595 bool mlo; 7596 int err; 7597 7598 if (link_id >= 0) { 7599 mlo = true; 7600 if (WARN_ON(!ap_mld_addr)) 7601 return -EINVAL; 7602 err = ieee80211_vif_set_links(sdata, BIT(link_id), 0); 7603 } else { 7604 if (WARN_ON(ap_mld_addr)) 7605 return -EINVAL; 7606 ap_mld_addr = cbss->bssid; 7607 err = ieee80211_vif_set_links(sdata, 0, 0); 7608 link_id = 0; 7609 mlo = false; 7610 } 7611 7612 if (err) 7613 return err; 7614 7615 link = sdata_dereference(sdata->link[link_id], sdata); 7616 if (WARN_ON(!link)) { 7617 err = -ENOLINK; 7618 goto out_err; 7619 } 7620 7621 if (WARN_ON(!ifmgd->auth_data && !ifmgd->assoc_data)) { 7622 err = -EINVAL; 7623 goto out_err; 7624 } 7625 7626 /* If a reconfig is happening, bail out */ 7627 if (local->in_reconfig) { 7628 err = -EBUSY; 7629 goto out_err; 7630 } 7631 7632 if (assoc) { 7633 rcu_read_lock(); 7634 have_sta = sta_info_get(sdata, ap_mld_addr); 7635 rcu_read_unlock(); 7636 } 7637 7638 if (!have_sta) { 7639 if (mlo) 7640 new_sta = sta_info_alloc_with_link(sdata, ap_mld_addr, 7641 link_id, cbss->bssid, 7642 GFP_KERNEL); 7643 else 7644 new_sta = sta_info_alloc(sdata, ap_mld_addr, GFP_KERNEL); 7645 7646 if (!new_sta) { 7647 err = -ENOMEM; 7648 goto out_err; 7649 } 7650 7651 new_sta->sta.mlo = mlo; 7652 } 7653 7654 /* 7655 * Set up the information for the new channel before setting the 7656 * new channel. We can't - completely race-free - change the basic 7657 * rates bitmap and the channel (sband) that it refers to, but if 7658 * we set it up before we at least avoid calling into the driver's 7659 * bss_info_changed() method with invalid information (since we do 7660 * call that from changing the channel - only for IDLE and perhaps 7661 * some others, but ...). 7662 * 7663 * So to avoid that, just set up all the new information before the 7664 * channel, but tell the driver to apply it only afterwards, since 7665 * it might need the new channel for that. 7666 */ 7667 if (new_sta) { 7668 const struct cfg80211_bss_ies *ies; 7669 struct link_sta_info *link_sta; 7670 7671 rcu_read_lock(); 7672 link_sta = rcu_dereference(new_sta->link[link_id]); 7673 if (WARN_ON(!link_sta)) { 7674 rcu_read_unlock(); 7675 sta_info_free(local, new_sta); 7676 err = -EINVAL; 7677 goto out_err; 7678 } 7679 7680 err = ieee80211_mgd_setup_link_sta(link, new_sta, 7681 link_sta, cbss); 7682 if (err) { 7683 rcu_read_unlock(); 7684 sta_info_free(local, new_sta); 7685 goto out_err; 7686 } 7687 7688 memcpy(link->u.mgd.bssid, cbss->bssid, ETH_ALEN); 7689 7690 /* set timing information */ 7691 link->conf->beacon_int = cbss->beacon_interval; 7692 ies = rcu_dereference(cbss->beacon_ies); 7693 if (ies) { 7694 link->conf->sync_tsf = ies->tsf; 7695 link->conf->sync_device_ts = 7696 bss->device_ts_beacon; 7697 7698 ieee80211_get_dtim(ies, 7699 &link->conf->sync_dtim_count, 7700 NULL); 7701 } else if (!ieee80211_hw_check(&sdata->local->hw, 7702 TIMING_BEACON_ONLY)) { 7703 ies = rcu_dereference(cbss->proberesp_ies); 7704 /* must be non-NULL since beacon IEs were NULL */ 7705 link->conf->sync_tsf = ies->tsf; 7706 link->conf->sync_device_ts = 7707 bss->device_ts_presp; 7708 link->conf->sync_dtim_count = 0; 7709 } else { 7710 link->conf->sync_tsf = 0; 7711 link->conf->sync_device_ts = 0; 7712 link->conf->sync_dtim_count = 0; 7713 } 7714 rcu_read_unlock(); 7715 } 7716 7717 if (new_sta || override) { 7718 /* 7719 * Only set this if we're also going to calculate the AP 7720 * settings etc., otherwise this was set before in a 7721 * previous call. Note override is set to %true in assoc 7722 * if the settings were changed. 7723 */ 7724 link->u.mgd.conn = *conn; 7725 err = ieee80211_prep_channel(sdata, link, link->link_id, cbss, 7726 mlo, &link->u.mgd.conn); 7727 if (err) { 7728 if (new_sta) 7729 sta_info_free(local, new_sta); 7730 goto out_err; 7731 } 7732 /* pass out for use in assoc */ 7733 *conn = link->u.mgd.conn; 7734 } 7735 7736 if (new_sta) { 7737 /* 7738 * tell driver about BSSID, basic rates and timing 7739 * this was set up above, before setting the channel 7740 */ 7741 ieee80211_link_info_change_notify(sdata, link, 7742 BSS_CHANGED_BSSID | 7743 BSS_CHANGED_BASIC_RATES | 7744 BSS_CHANGED_BEACON_INT); 7745 7746 if (assoc) 7747 sta_info_pre_move_state(new_sta, IEEE80211_STA_AUTH); 7748 7749 err = sta_info_insert(new_sta); 7750 new_sta = NULL; 7751 if (err) { 7752 sdata_info(sdata, 7753 "failed to insert STA entry for the AP (error %d)\n", 7754 err); 7755 goto out_release_chan; 7756 } 7757 } else 7758 WARN_ON_ONCE(!ether_addr_equal(link->u.mgd.bssid, cbss->bssid)); 7759 7760 /* Cancel scan to ensure that nothing interferes with connection */ 7761 if (local->scanning) 7762 ieee80211_scan_cancel(local); 7763 7764 return 0; 7765 7766 out_release_chan: 7767 ieee80211_link_release_channel(link); 7768 out_err: 7769 ieee80211_vif_set_links(sdata, 0, 0); 7770 return err; 7771 } 7772 7773 static bool ieee80211_mgd_csa_present(struct ieee80211_sub_if_data *sdata, 7774 const struct cfg80211_bss_ies *ies, 7775 u8 cur_channel, bool ignore_ecsa) 7776 { 7777 const struct element *csa_elem, *ecsa_elem; 7778 struct ieee80211_channel_sw_ie *csa = NULL; 7779 struct ieee80211_ext_chansw_ie *ecsa = NULL; 7780 7781 if (!ies) 7782 return false; 7783 7784 csa_elem = cfg80211_find_elem(WLAN_EID_CHANNEL_SWITCH, 7785 ies->data, ies->len); 7786 if (csa_elem && csa_elem->datalen == sizeof(*csa)) 7787 csa = (void *)csa_elem->data; 7788 7789 ecsa_elem = cfg80211_find_elem(WLAN_EID_EXT_CHANSWITCH_ANN, 7790 ies->data, ies->len); 7791 if (ecsa_elem && ecsa_elem->datalen == sizeof(*ecsa)) 7792 ecsa = (void *)ecsa_elem->data; 7793 7794 if (csa && csa->count == 0) 7795 csa = NULL; 7796 if (csa && !csa->mode && csa->new_ch_num == cur_channel) 7797 csa = NULL; 7798 7799 if (ecsa && ecsa->count == 0) 7800 ecsa = NULL; 7801 if (ecsa && !ecsa->mode && ecsa->new_ch_num == cur_channel) 7802 ecsa = NULL; 7803 7804 if (ignore_ecsa && ecsa) { 7805 sdata_info(sdata, 7806 "Ignoring ECSA in probe response - was considered stuck!\n"); 7807 return csa; 7808 } 7809 7810 return csa || ecsa; 7811 } 7812 7813 static bool ieee80211_mgd_csa_in_process(struct ieee80211_sub_if_data *sdata, 7814 struct cfg80211_bss *bss) 7815 { 7816 u8 cur_channel; 7817 bool ret; 7818 7819 cur_channel = ieee80211_frequency_to_channel(bss->channel->center_freq); 7820 7821 rcu_read_lock(); 7822 if (ieee80211_mgd_csa_present(sdata, 7823 rcu_dereference(bss->beacon_ies), 7824 cur_channel, false)) { 7825 ret = true; 7826 goto out; 7827 } 7828 7829 if (ieee80211_mgd_csa_present(sdata, 7830 rcu_dereference(bss->proberesp_ies), 7831 cur_channel, bss->proberesp_ecsa_stuck)) { 7832 ret = true; 7833 goto out; 7834 } 7835 7836 ret = false; 7837 out: 7838 rcu_read_unlock(); 7839 return ret; 7840 } 7841 7842 /* config hooks */ 7843 int ieee80211_mgd_auth(struct ieee80211_sub_if_data *sdata, 7844 struct cfg80211_auth_request *req) 7845 { 7846 struct ieee80211_local *local = sdata->local; 7847 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 7848 struct ieee80211_mgd_auth_data *auth_data; 7849 struct ieee80211_conn_settings conn; 7850 struct ieee80211_link_data *link; 7851 struct ieee80211_supported_band *sband; 7852 struct ieee80211_bss *bss; 7853 u16 auth_alg; 7854 int err; 7855 bool cont_auth, wmm_used; 7856 7857 lockdep_assert_wiphy(sdata->local->hw.wiphy); 7858 7859 /* prepare auth data structure */ 7860 7861 switch (req->auth_type) { 7862 case NL80211_AUTHTYPE_OPEN_SYSTEM: 7863 auth_alg = WLAN_AUTH_OPEN; 7864 break; 7865 case NL80211_AUTHTYPE_SHARED_KEY: 7866 if (fips_enabled) 7867 return -EOPNOTSUPP; 7868 auth_alg = WLAN_AUTH_SHARED_KEY; 7869 break; 7870 case NL80211_AUTHTYPE_FT: 7871 auth_alg = WLAN_AUTH_FT; 7872 break; 7873 case NL80211_AUTHTYPE_NETWORK_EAP: 7874 auth_alg = WLAN_AUTH_LEAP; 7875 break; 7876 case NL80211_AUTHTYPE_SAE: 7877 auth_alg = WLAN_AUTH_SAE; 7878 break; 7879 case NL80211_AUTHTYPE_FILS_SK: 7880 auth_alg = WLAN_AUTH_FILS_SK; 7881 break; 7882 case NL80211_AUTHTYPE_FILS_SK_PFS: 7883 auth_alg = WLAN_AUTH_FILS_SK_PFS; 7884 break; 7885 case NL80211_AUTHTYPE_FILS_PK: 7886 auth_alg = WLAN_AUTH_FILS_PK; 7887 break; 7888 default: 7889 return -EOPNOTSUPP; 7890 } 7891 7892 if (ifmgd->assoc_data) 7893 return -EBUSY; 7894 7895 if (ieee80211_mgd_csa_in_process(sdata, req->bss)) { 7896 sdata_info(sdata, "AP is in CSA process, reject auth\n"); 7897 return -EINVAL; 7898 } 7899 7900 auth_data = kzalloc(sizeof(*auth_data) + req->auth_data_len + 7901 req->ie_len, GFP_KERNEL); 7902 if (!auth_data) 7903 return -ENOMEM; 7904 7905 memcpy(auth_data->ap_addr, 7906 req->ap_mld_addr ?: req->bss->bssid, 7907 ETH_ALEN); 7908 auth_data->bss = req->bss; 7909 auth_data->link_id = req->link_id; 7910 7911 if (req->auth_data_len >= 4) { 7912 if (req->auth_type == NL80211_AUTHTYPE_SAE) { 7913 __le16 *pos = (__le16 *) req->auth_data; 7914 7915 auth_data->sae_trans = le16_to_cpu(pos[0]); 7916 auth_data->sae_status = le16_to_cpu(pos[1]); 7917 } 7918 memcpy(auth_data->data, req->auth_data + 4, 7919 req->auth_data_len - 4); 7920 auth_data->data_len += req->auth_data_len - 4; 7921 } 7922 7923 /* Check if continuing authentication or trying to authenticate with the 7924 * same BSS that we were in the process of authenticating with and avoid 7925 * removal and re-addition of the STA entry in 7926 * ieee80211_prep_connection(). 7927 */ 7928 cont_auth = ifmgd->auth_data && req->bss == ifmgd->auth_data->bss && 7929 ifmgd->auth_data->link_id == req->link_id; 7930 7931 if (req->ie && req->ie_len) { 7932 memcpy(&auth_data->data[auth_data->data_len], 7933 req->ie, req->ie_len); 7934 auth_data->data_len += req->ie_len; 7935 } 7936 7937 if (req->key && req->key_len) { 7938 auth_data->key_len = req->key_len; 7939 auth_data->key_idx = req->key_idx; 7940 memcpy(auth_data->key, req->key, req->key_len); 7941 } 7942 7943 auth_data->algorithm = auth_alg; 7944 7945 /* try to authenticate/probe */ 7946 7947 if (ifmgd->auth_data) { 7948 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE) { 7949 auth_data->peer_confirmed = 7950 ifmgd->auth_data->peer_confirmed; 7951 } 7952 ieee80211_destroy_auth_data(sdata, cont_auth); 7953 } 7954 7955 /* prep auth_data so we don't go into idle on disassoc */ 7956 ifmgd->auth_data = auth_data; 7957 7958 /* If this is continuation of an ongoing SAE authentication exchange 7959 * (i.e., request to send SAE Confirm) and the peer has already 7960 * confirmed, mark authentication completed since we are about to send 7961 * out SAE Confirm. 7962 */ 7963 if (cont_auth && req->auth_type == NL80211_AUTHTYPE_SAE && 7964 auth_data->peer_confirmed && auth_data->sae_trans == 2) 7965 ieee80211_mark_sta_auth(sdata); 7966 7967 if (ifmgd->associated) { 7968 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 7969 7970 sdata_info(sdata, 7971 "disconnect from AP %pM for new auth to %pM\n", 7972 sdata->vif.cfg.ap_addr, auth_data->ap_addr); 7973 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 7974 WLAN_REASON_UNSPECIFIED, 7975 false, frame_buf); 7976 7977 ieee80211_report_disconnect(sdata, frame_buf, 7978 sizeof(frame_buf), true, 7979 WLAN_REASON_UNSPECIFIED, 7980 false); 7981 } 7982 7983 /* needed for transmitting the auth frame(s) properly */ 7984 memcpy(sdata->vif.cfg.ap_addr, auth_data->ap_addr, ETH_ALEN); 7985 7986 bss = (void *)req->bss->priv; 7987 wmm_used = bss->wmm_used && (local->hw.queues >= IEEE80211_NUM_ACS); 7988 7989 sband = local->hw.wiphy->bands[req->bss->channel->band]; 7990 7991 ieee80211_determine_our_sta_mode_auth(sdata, sband, req, wmm_used, 7992 &conn); 7993 7994 err = ieee80211_prep_connection(sdata, req->bss, req->link_id, 7995 req->ap_mld_addr, cont_auth, 7996 &conn, false); 7997 if (err) 7998 goto err_clear; 7999 8000 if (req->link_id >= 0) 8001 link = sdata_dereference(sdata->link[req->link_id], sdata); 8002 else 8003 link = &sdata->deflink; 8004 8005 if (WARN_ON(!link)) { 8006 err = -ENOLINK; 8007 goto err_clear; 8008 } 8009 8010 sdata_info(sdata, "authenticate with %pM (local address=%pM)\n", 8011 auth_data->ap_addr, link->conf->addr); 8012 8013 err = ieee80211_auth(sdata); 8014 if (err) { 8015 sta_info_destroy_addr(sdata, auth_data->ap_addr); 8016 goto err_clear; 8017 } 8018 8019 /* hold our own reference */ 8020 cfg80211_ref_bss(local->hw.wiphy, auth_data->bss); 8021 return 0; 8022 8023 err_clear: 8024 if (!ieee80211_vif_is_mld(&sdata->vif)) { 8025 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8026 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8027 BSS_CHANGED_BSSID); 8028 ieee80211_link_release_channel(&sdata->deflink); 8029 } 8030 ifmgd->auth_data = NULL; 8031 kfree(auth_data); 8032 return err; 8033 } 8034 8035 static void 8036 ieee80211_setup_assoc_link(struct ieee80211_sub_if_data *sdata, 8037 struct ieee80211_mgd_assoc_data *assoc_data, 8038 struct cfg80211_assoc_request *req, 8039 struct ieee80211_conn_settings *conn, 8040 unsigned int link_id) 8041 { 8042 struct ieee80211_local *local = sdata->local; 8043 const struct cfg80211_bss_ies *bss_ies; 8044 struct ieee80211_supported_band *sband; 8045 struct ieee80211_link_data *link; 8046 struct cfg80211_bss *cbss; 8047 struct ieee80211_bss *bss; 8048 8049 cbss = assoc_data->link[link_id].bss; 8050 if (WARN_ON(!cbss)) 8051 return; 8052 8053 bss = (void *)cbss->priv; 8054 8055 sband = local->hw.wiphy->bands[cbss->channel->band]; 8056 if (WARN_ON(!sband)) 8057 return; 8058 8059 link = sdata_dereference(sdata->link[link_id], sdata); 8060 if (WARN_ON(!link)) 8061 return; 8062 8063 /* for MLO connections assume advertising all rates is OK */ 8064 if (!req->ap_mld_addr) { 8065 assoc_data->supp_rates = bss->supp_rates; 8066 assoc_data->supp_rates_len = bss->supp_rates_len; 8067 } 8068 8069 /* copy and link elems for the STA profile */ 8070 if (req->links[link_id].elems_len) { 8071 memcpy(assoc_data->ie_pos, req->links[link_id].elems, 8072 req->links[link_id].elems_len); 8073 assoc_data->link[link_id].elems = assoc_data->ie_pos; 8074 assoc_data->link[link_id].elems_len = req->links[link_id].elems_len; 8075 assoc_data->ie_pos += req->links[link_id].elems_len; 8076 } 8077 8078 link->u.mgd.beacon_crc_valid = false; 8079 link->u.mgd.dtim_period = 0; 8080 link->u.mgd.have_beacon = false; 8081 8082 /* override HT configuration only if the AP and we support it */ 8083 if (conn->mode >= IEEE80211_CONN_MODE_HT) { 8084 struct ieee80211_sta_ht_cap sta_ht_cap; 8085 8086 memcpy(&sta_ht_cap, &sband->ht_cap, sizeof(sta_ht_cap)); 8087 ieee80211_apply_htcap_overrides(sdata, &sta_ht_cap); 8088 } 8089 8090 rcu_read_lock(); 8091 bss_ies = rcu_dereference(cbss->beacon_ies); 8092 if (bss_ies) { 8093 u8 dtim_count = 0; 8094 8095 ieee80211_get_dtim(bss_ies, &dtim_count, 8096 &link->u.mgd.dtim_period); 8097 8098 sdata->deflink.u.mgd.have_beacon = true; 8099 8100 if (ieee80211_hw_check(&local->hw, TIMING_BEACON_ONLY)) { 8101 link->conf->sync_tsf = bss_ies->tsf; 8102 link->conf->sync_device_ts = bss->device_ts_beacon; 8103 link->conf->sync_dtim_count = dtim_count; 8104 } 8105 } else { 8106 bss_ies = rcu_dereference(cbss->ies); 8107 } 8108 8109 if (bss_ies) { 8110 const struct element *elem; 8111 8112 elem = cfg80211_find_ext_elem(WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION, 8113 bss_ies->data, bss_ies->len); 8114 if (elem && elem->datalen >= 3) 8115 link->conf->profile_periodicity = elem->data[2]; 8116 else 8117 link->conf->profile_periodicity = 0; 8118 8119 elem = cfg80211_find_elem(WLAN_EID_EXT_CAPABILITY, 8120 bss_ies->data, bss_ies->len); 8121 if (elem && elem->datalen >= 11 && 8122 (elem->data[10] & WLAN_EXT_CAPA11_EMA_SUPPORT)) 8123 link->conf->ema_ap = true; 8124 else 8125 link->conf->ema_ap = false; 8126 } 8127 rcu_read_unlock(); 8128 8129 if (bss->corrupt_data) { 8130 char *corrupt_type = "data"; 8131 8132 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_BEACON) { 8133 if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) 8134 corrupt_type = "beacon and probe response"; 8135 else 8136 corrupt_type = "beacon"; 8137 } else if (bss->corrupt_data & IEEE80211_BSS_CORRUPT_PROBE_RESP) { 8138 corrupt_type = "probe response"; 8139 } 8140 sdata_info(sdata, "associating to AP %pM with corrupt %s\n", 8141 cbss->bssid, corrupt_type); 8142 } 8143 8144 if (link->u.mgd.req_smps == IEEE80211_SMPS_AUTOMATIC) { 8145 if (sdata->u.mgd.powersave) 8146 link->smps_mode = IEEE80211_SMPS_DYNAMIC; 8147 else 8148 link->smps_mode = IEEE80211_SMPS_OFF; 8149 } else { 8150 link->smps_mode = link->u.mgd.req_smps; 8151 } 8152 } 8153 8154 static int 8155 ieee80211_mgd_get_ap_ht_vht_capa(struct ieee80211_sub_if_data *sdata, 8156 struct ieee80211_mgd_assoc_data *assoc_data, 8157 int link_id) 8158 { 8159 struct cfg80211_bss *cbss = assoc_data->link[link_id].bss; 8160 enum nl80211_band band = cbss->channel->band; 8161 struct ieee80211_supported_band *sband; 8162 const struct element *elem; 8163 int err; 8164 8165 /* neither HT nor VHT elements used on 6 GHz */ 8166 if (band == NL80211_BAND_6GHZ) 8167 return 0; 8168 8169 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_HT) 8170 return 0; 8171 8172 rcu_read_lock(); 8173 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_HT_OPERATION); 8174 if (!elem || elem->datalen < sizeof(struct ieee80211_ht_operation)) { 8175 mlme_link_id_dbg(sdata, link_id, "no HT operation on BSS %pM\n", 8176 cbss->bssid); 8177 err = -EINVAL; 8178 goto out_rcu; 8179 } 8180 assoc_data->link[link_id].ap_ht_param = 8181 ((struct ieee80211_ht_operation *)(elem->data))->ht_param; 8182 rcu_read_unlock(); 8183 8184 if (assoc_data->link[link_id].conn.mode < IEEE80211_CONN_MODE_VHT) 8185 return 0; 8186 8187 /* some drivers want to support VHT on 2.4 GHz even */ 8188 sband = sdata->local->hw.wiphy->bands[band]; 8189 if (!sband->vht_cap.vht_supported) 8190 return 0; 8191 8192 rcu_read_lock(); 8193 elem = ieee80211_bss_get_elem(cbss, WLAN_EID_VHT_CAPABILITY); 8194 /* but even then accept it not being present on the AP */ 8195 if (!elem && band == NL80211_BAND_2GHZ) { 8196 err = 0; 8197 goto out_rcu; 8198 } 8199 if (!elem || elem->datalen < sizeof(struct ieee80211_vht_cap)) { 8200 mlme_link_id_dbg(sdata, link_id, "no VHT capa on BSS %pM\n", 8201 cbss->bssid); 8202 err = -EINVAL; 8203 goto out_rcu; 8204 } 8205 memcpy(&assoc_data->link[link_id].ap_vht_cap, elem->data, 8206 sizeof(struct ieee80211_vht_cap)); 8207 rcu_read_unlock(); 8208 8209 return 0; 8210 out_rcu: 8211 rcu_read_unlock(); 8212 return err; 8213 } 8214 8215 int ieee80211_mgd_assoc(struct ieee80211_sub_if_data *sdata, 8216 struct cfg80211_assoc_request *req) 8217 { 8218 unsigned int assoc_link_id = req->link_id < 0 ? 0 : req->link_id; 8219 struct ieee80211_local *local = sdata->local; 8220 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8221 struct ieee80211_mgd_assoc_data *assoc_data; 8222 const struct element *ssid_elem; 8223 struct ieee80211_vif_cfg *vif_cfg = &sdata->vif.cfg; 8224 struct ieee80211_link_data *link; 8225 struct cfg80211_bss *cbss; 8226 bool override, uapsd_supported; 8227 bool match_auth; 8228 int i, err; 8229 size_t size = sizeof(*assoc_data) + req->ie_len; 8230 8231 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) 8232 size += req->links[i].elems_len; 8233 8234 /* FIXME: no support for 4-addr MLO yet */ 8235 if (sdata->u.mgd.use_4addr && req->link_id >= 0) 8236 return -EOPNOTSUPP; 8237 8238 assoc_data = kzalloc(size, GFP_KERNEL); 8239 if (!assoc_data) 8240 return -ENOMEM; 8241 8242 cbss = req->link_id < 0 ? req->bss : req->links[req->link_id].bss; 8243 8244 if (ieee80211_mgd_csa_in_process(sdata, cbss)) { 8245 sdata_info(sdata, "AP is in CSA process, reject assoc\n"); 8246 err = -EINVAL; 8247 goto err_free; 8248 } 8249 8250 rcu_read_lock(); 8251 ssid_elem = ieee80211_bss_get_elem(cbss, WLAN_EID_SSID); 8252 if (!ssid_elem || ssid_elem->datalen > sizeof(assoc_data->ssid)) { 8253 rcu_read_unlock(); 8254 err = -EINVAL; 8255 goto err_free; 8256 } 8257 8258 memcpy(assoc_data->ssid, ssid_elem->data, ssid_elem->datalen); 8259 assoc_data->ssid_len = ssid_elem->datalen; 8260 rcu_read_unlock(); 8261 8262 if (req->ap_mld_addr) 8263 memcpy(assoc_data->ap_addr, req->ap_mld_addr, ETH_ALEN); 8264 else 8265 memcpy(assoc_data->ap_addr, cbss->bssid, ETH_ALEN); 8266 8267 if (ifmgd->associated) { 8268 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8269 8270 sdata_info(sdata, 8271 "disconnect from AP %pM for new assoc to %pM\n", 8272 sdata->vif.cfg.ap_addr, assoc_data->ap_addr); 8273 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8274 WLAN_REASON_UNSPECIFIED, 8275 false, frame_buf); 8276 8277 ieee80211_report_disconnect(sdata, frame_buf, 8278 sizeof(frame_buf), true, 8279 WLAN_REASON_UNSPECIFIED, 8280 false); 8281 } 8282 8283 memcpy(&ifmgd->ht_capa, &req->ht_capa, sizeof(ifmgd->ht_capa)); 8284 memcpy(&ifmgd->ht_capa_mask, &req->ht_capa_mask, 8285 sizeof(ifmgd->ht_capa_mask)); 8286 8287 memcpy(&ifmgd->vht_capa, &req->vht_capa, sizeof(ifmgd->vht_capa)); 8288 memcpy(&ifmgd->vht_capa_mask, &req->vht_capa_mask, 8289 sizeof(ifmgd->vht_capa_mask)); 8290 8291 memcpy(&ifmgd->s1g_capa, &req->s1g_capa, sizeof(ifmgd->s1g_capa)); 8292 memcpy(&ifmgd->s1g_capa_mask, &req->s1g_capa_mask, 8293 sizeof(ifmgd->s1g_capa_mask)); 8294 8295 /* keep some setup (AP STA, channel, ...) if matching */ 8296 match_auth = ifmgd->auth_data && 8297 ether_addr_equal(ifmgd->auth_data->ap_addr, 8298 assoc_data->ap_addr) && 8299 ifmgd->auth_data->link_id == req->link_id; 8300 8301 if (req->ap_mld_addr) { 8302 uapsd_supported = true; 8303 8304 if (req->flags & (ASSOC_REQ_DISABLE_HT | 8305 ASSOC_REQ_DISABLE_VHT | 8306 ASSOC_REQ_DISABLE_HE | 8307 ASSOC_REQ_DISABLE_EHT)) { 8308 err = -EINVAL; 8309 goto err_free; 8310 } 8311 8312 for (i = 0; i < IEEE80211_MLD_MAX_NUM_LINKS; i++) { 8313 struct ieee80211_supported_band *sband; 8314 struct cfg80211_bss *link_cbss = req->links[i].bss; 8315 struct ieee80211_bss *bss; 8316 8317 if (!link_cbss) 8318 continue; 8319 8320 bss = (void *)link_cbss->priv; 8321 8322 if (!bss->wmm_used) { 8323 err = -EINVAL; 8324 req->links[i].error = err; 8325 goto err_free; 8326 } 8327 8328 if (link_cbss->channel->band == NL80211_BAND_S1GHZ) { 8329 err = -EINVAL; 8330 req->links[i].error = err; 8331 goto err_free; 8332 } 8333 8334 link = sdata_dereference(sdata->link[i], sdata); 8335 if (link) 8336 ether_addr_copy(assoc_data->link[i].addr, 8337 link->conf->addr); 8338 else 8339 eth_random_addr(assoc_data->link[i].addr); 8340 sband = local->hw.wiphy->bands[link_cbss->channel->band]; 8341 8342 if (match_auth && i == assoc_link_id && link) 8343 assoc_data->link[i].conn = link->u.mgd.conn; 8344 else 8345 assoc_data->link[i].conn = 8346 ieee80211_conn_settings_unlimited; 8347 ieee80211_determine_our_sta_mode_assoc(sdata, sband, 8348 req, true, i, 8349 &assoc_data->link[i].conn); 8350 assoc_data->link[i].bss = link_cbss; 8351 assoc_data->link[i].disabled = req->links[i].disabled; 8352 8353 if (!bss->uapsd_supported) 8354 uapsd_supported = false; 8355 8356 if (assoc_data->link[i].conn.mode < IEEE80211_CONN_MODE_EHT) { 8357 err = -EINVAL; 8358 req->links[i].error = err; 8359 goto err_free; 8360 } 8361 8362 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, 8363 assoc_data, i); 8364 if (err) { 8365 err = -EINVAL; 8366 req->links[i].error = err; 8367 goto err_free; 8368 } 8369 } 8370 8371 assoc_data->wmm = true; 8372 } else { 8373 struct ieee80211_supported_band *sband; 8374 struct ieee80211_bss *bss = (void *)cbss->priv; 8375 8376 memcpy(assoc_data->link[0].addr, sdata->vif.addr, ETH_ALEN); 8377 assoc_data->s1g = cbss->channel->band == NL80211_BAND_S1GHZ; 8378 8379 assoc_data->wmm = bss->wmm_used && 8380 (local->hw.queues >= IEEE80211_NUM_ACS); 8381 8382 if (cbss->channel->band == NL80211_BAND_6GHZ && 8383 req->flags & (ASSOC_REQ_DISABLE_HT | 8384 ASSOC_REQ_DISABLE_VHT | 8385 ASSOC_REQ_DISABLE_HE)) { 8386 err = -EINVAL; 8387 goto err_free; 8388 } 8389 8390 sband = local->hw.wiphy->bands[cbss->channel->band]; 8391 8392 assoc_data->link[0].bss = cbss; 8393 8394 if (match_auth) 8395 assoc_data->link[0].conn = sdata->deflink.u.mgd.conn; 8396 else 8397 assoc_data->link[0].conn = 8398 ieee80211_conn_settings_unlimited; 8399 ieee80211_determine_our_sta_mode_assoc(sdata, sband, req, 8400 assoc_data->wmm, 0, 8401 &assoc_data->link[0].conn); 8402 8403 uapsd_supported = bss->uapsd_supported; 8404 8405 err = ieee80211_mgd_get_ap_ht_vht_capa(sdata, assoc_data, 0); 8406 if (err) 8407 goto err_free; 8408 } 8409 8410 assoc_data->spp_amsdu = req->flags & ASSOC_REQ_SPP_AMSDU; 8411 8412 if (ifmgd->auth_data && !ifmgd->auth_data->done) { 8413 err = -EBUSY; 8414 goto err_free; 8415 } 8416 8417 if (ifmgd->assoc_data) { 8418 err = -EBUSY; 8419 goto err_free; 8420 } 8421 8422 /* Cleanup is delayed if auth_data matches */ 8423 if (ifmgd->auth_data && !match_auth) 8424 ieee80211_destroy_auth_data(sdata, false); 8425 8426 if (req->ie && req->ie_len) { 8427 memcpy(assoc_data->ie, req->ie, req->ie_len); 8428 assoc_data->ie_len = req->ie_len; 8429 assoc_data->ie_pos = assoc_data->ie + assoc_data->ie_len; 8430 } else { 8431 assoc_data->ie_pos = assoc_data->ie; 8432 } 8433 8434 if (req->fils_kek) { 8435 /* should already be checked in cfg80211 - so warn */ 8436 if (WARN_ON(req->fils_kek_len > FILS_MAX_KEK_LEN)) { 8437 err = -EINVAL; 8438 goto err_free; 8439 } 8440 memcpy(assoc_data->fils_kek, req->fils_kek, 8441 req->fils_kek_len); 8442 assoc_data->fils_kek_len = req->fils_kek_len; 8443 } 8444 8445 if (req->fils_nonces) 8446 memcpy(assoc_data->fils_nonces, req->fils_nonces, 8447 2 * FILS_NONCE_LEN); 8448 8449 /* default timeout */ 8450 assoc_data->timeout = jiffies; 8451 assoc_data->timeout_started = true; 8452 8453 assoc_data->assoc_link_id = assoc_link_id; 8454 8455 if (req->ap_mld_addr) { 8456 /* if there was no authentication, set up the link */ 8457 err = ieee80211_vif_set_links(sdata, BIT(assoc_link_id), 0); 8458 if (err) 8459 goto err_clear; 8460 } 8461 8462 link = sdata_dereference(sdata->link[assoc_link_id], sdata); 8463 if (WARN_ON(!link)) { 8464 err = -EINVAL; 8465 goto err_clear; 8466 } 8467 8468 override = link->u.mgd.conn.mode != 8469 assoc_data->link[assoc_link_id].conn.mode || 8470 link->u.mgd.conn.bw_limit != 8471 assoc_data->link[assoc_link_id].conn.bw_limit; 8472 link->u.mgd.conn = assoc_data->link[assoc_link_id].conn; 8473 8474 ieee80211_setup_assoc_link(sdata, assoc_data, req, &link->u.mgd.conn, 8475 assoc_link_id); 8476 8477 if (WARN((sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD) && 8478 ieee80211_hw_check(&local->hw, PS_NULLFUNC_STACK), 8479 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n")) 8480 sdata->vif.driver_flags &= ~IEEE80211_VIF_SUPPORTS_UAPSD; 8481 8482 if (assoc_data->wmm && uapsd_supported && 8483 (sdata->vif.driver_flags & IEEE80211_VIF_SUPPORTS_UAPSD)) { 8484 assoc_data->uapsd = true; 8485 ifmgd->flags |= IEEE80211_STA_UAPSD_ENABLED; 8486 } else { 8487 assoc_data->uapsd = false; 8488 ifmgd->flags &= ~IEEE80211_STA_UAPSD_ENABLED; 8489 } 8490 8491 if (req->prev_bssid) 8492 memcpy(assoc_data->prev_ap_addr, req->prev_bssid, ETH_ALEN); 8493 8494 if (req->use_mfp) { 8495 ifmgd->mfp = IEEE80211_MFP_REQUIRED; 8496 ifmgd->flags |= IEEE80211_STA_MFP_ENABLED; 8497 } else { 8498 ifmgd->mfp = IEEE80211_MFP_DISABLED; 8499 ifmgd->flags &= ~IEEE80211_STA_MFP_ENABLED; 8500 } 8501 8502 if (req->flags & ASSOC_REQ_USE_RRM) 8503 ifmgd->flags |= IEEE80211_STA_ENABLE_RRM; 8504 else 8505 ifmgd->flags &= ~IEEE80211_STA_ENABLE_RRM; 8506 8507 if (req->crypto.control_port) 8508 ifmgd->flags |= IEEE80211_STA_CONTROL_PORT; 8509 else 8510 ifmgd->flags &= ~IEEE80211_STA_CONTROL_PORT; 8511 8512 sdata->control_port_protocol = req->crypto.control_port_ethertype; 8513 sdata->control_port_no_encrypt = req->crypto.control_port_no_encrypt; 8514 sdata->control_port_over_nl80211 = 8515 req->crypto.control_port_over_nl80211; 8516 sdata->control_port_no_preauth = req->crypto.control_port_no_preauth; 8517 8518 /* kick off associate process */ 8519 ifmgd->assoc_data = assoc_data; 8520 8521 for (i = 0; i < ARRAY_SIZE(assoc_data->link); i++) { 8522 if (!assoc_data->link[i].bss) 8523 continue; 8524 if (i == assoc_data->assoc_link_id) 8525 continue; 8526 /* only calculate the mode, hence link == NULL */ 8527 err = ieee80211_prep_channel(sdata, NULL, i, 8528 assoc_data->link[i].bss, true, 8529 &assoc_data->link[i].conn); 8530 if (err) { 8531 req->links[i].error = err; 8532 goto err_clear; 8533 } 8534 } 8535 8536 memcpy(vif_cfg->ssid, assoc_data->ssid, assoc_data->ssid_len); 8537 vif_cfg->ssid_len = assoc_data->ssid_len; 8538 8539 /* needed for transmitting the assoc frames properly */ 8540 memcpy(sdata->vif.cfg.ap_addr, assoc_data->ap_addr, ETH_ALEN); 8541 8542 err = ieee80211_prep_connection(sdata, cbss, req->link_id, 8543 req->ap_mld_addr, true, 8544 &assoc_data->link[assoc_link_id].conn, 8545 override); 8546 if (err) 8547 goto err_clear; 8548 8549 if (ieee80211_hw_check(&sdata->local->hw, NEED_DTIM_BEFORE_ASSOC)) { 8550 const struct cfg80211_bss_ies *beacon_ies; 8551 8552 rcu_read_lock(); 8553 beacon_ies = rcu_dereference(req->bss->beacon_ies); 8554 if (!beacon_ies) { 8555 /* 8556 * Wait up to one beacon interval ... 8557 * should this be more if we miss one? 8558 */ 8559 sdata_info(sdata, "waiting for beacon from %pM\n", 8560 link->u.mgd.bssid); 8561 assoc_data->timeout = TU_TO_EXP_TIME(req->bss->beacon_interval); 8562 assoc_data->timeout_started = true; 8563 assoc_data->need_beacon = true; 8564 } 8565 rcu_read_unlock(); 8566 } 8567 8568 run_again(sdata, assoc_data->timeout); 8569 8570 /* We are associating, clean up auth_data */ 8571 if (ifmgd->auth_data) 8572 ieee80211_destroy_auth_data(sdata, true); 8573 8574 return 0; 8575 err_clear: 8576 if (!ifmgd->auth_data) { 8577 eth_zero_addr(sdata->deflink.u.mgd.bssid); 8578 ieee80211_link_info_change_notify(sdata, &sdata->deflink, 8579 BSS_CHANGED_BSSID); 8580 } 8581 ifmgd->assoc_data = NULL; 8582 err_free: 8583 kfree(assoc_data); 8584 return err; 8585 } 8586 8587 int ieee80211_mgd_deauth(struct ieee80211_sub_if_data *sdata, 8588 struct cfg80211_deauth_request *req) 8589 { 8590 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8591 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8592 bool tx = !req->local_state_change; 8593 struct ieee80211_prep_tx_info info = { 8594 .subtype = IEEE80211_STYPE_DEAUTH, 8595 }; 8596 8597 if (ifmgd->auth_data && 8598 ether_addr_equal(ifmgd->auth_data->ap_addr, req->bssid)) { 8599 sdata_info(sdata, 8600 "aborting authentication with %pM by local choice (Reason: %u=%s)\n", 8601 req->bssid, req->reason_code, 8602 ieee80211_get_reason_code_string(req->reason_code)); 8603 8604 info.link_id = ifmgd->auth_data->link_id; 8605 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8606 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8607 IEEE80211_STYPE_DEAUTH, 8608 req->reason_code, tx, 8609 frame_buf); 8610 ieee80211_destroy_auth_data(sdata, false); 8611 ieee80211_report_disconnect(sdata, frame_buf, 8612 sizeof(frame_buf), true, 8613 req->reason_code, false); 8614 drv_mgd_complete_tx(sdata->local, sdata, &info); 8615 return 0; 8616 } 8617 8618 if (ifmgd->assoc_data && 8619 ether_addr_equal(ifmgd->assoc_data->ap_addr, req->bssid)) { 8620 sdata_info(sdata, 8621 "aborting association with %pM by local choice (Reason: %u=%s)\n", 8622 req->bssid, req->reason_code, 8623 ieee80211_get_reason_code_string(req->reason_code)); 8624 8625 info.link_id = ifmgd->assoc_data->assoc_link_id; 8626 drv_mgd_prepare_tx(sdata->local, sdata, &info); 8627 ieee80211_send_deauth_disassoc(sdata, req->bssid, req->bssid, 8628 IEEE80211_STYPE_DEAUTH, 8629 req->reason_code, tx, 8630 frame_buf); 8631 ieee80211_destroy_assoc_data(sdata, ASSOC_ABANDON); 8632 ieee80211_report_disconnect(sdata, frame_buf, 8633 sizeof(frame_buf), true, 8634 req->reason_code, false); 8635 drv_mgd_complete_tx(sdata->local, sdata, &info); 8636 return 0; 8637 } 8638 8639 if (ifmgd->associated && 8640 ether_addr_equal(sdata->vif.cfg.ap_addr, req->bssid)) { 8641 sdata_info(sdata, 8642 "deauthenticating from %pM by local choice (Reason: %u=%s)\n", 8643 req->bssid, req->reason_code, 8644 ieee80211_get_reason_code_string(req->reason_code)); 8645 8646 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DEAUTH, 8647 req->reason_code, tx, frame_buf); 8648 ieee80211_report_disconnect(sdata, frame_buf, 8649 sizeof(frame_buf), true, 8650 req->reason_code, false); 8651 drv_mgd_complete_tx(sdata->local, sdata, &info); 8652 return 0; 8653 } 8654 8655 return -ENOTCONN; 8656 } 8657 8658 int ieee80211_mgd_disassoc(struct ieee80211_sub_if_data *sdata, 8659 struct cfg80211_disassoc_request *req) 8660 { 8661 u8 frame_buf[IEEE80211_DEAUTH_FRAME_LEN]; 8662 8663 if (!sdata->u.mgd.associated || 8664 memcmp(sdata->vif.cfg.ap_addr, req->ap_addr, ETH_ALEN)) 8665 return -ENOTCONN; 8666 8667 sdata_info(sdata, 8668 "disassociating from %pM by local choice (Reason: %u=%s)\n", 8669 req->ap_addr, req->reason_code, 8670 ieee80211_get_reason_code_string(req->reason_code)); 8671 8672 ieee80211_set_disassoc(sdata, IEEE80211_STYPE_DISASSOC, 8673 req->reason_code, !req->local_state_change, 8674 frame_buf); 8675 8676 ieee80211_report_disconnect(sdata, frame_buf, sizeof(frame_buf), true, 8677 req->reason_code, false); 8678 8679 return 0; 8680 } 8681 8682 void ieee80211_mgd_stop_link(struct ieee80211_link_data *link) 8683 { 8684 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8685 &link->u.mgd.request_smps_work); 8686 wiphy_work_cancel(link->sdata->local->hw.wiphy, 8687 &link->u.mgd.recalc_smps); 8688 wiphy_delayed_work_cancel(link->sdata->local->hw.wiphy, 8689 &link->u.mgd.chswitch_work); 8690 } 8691 8692 void ieee80211_mgd_stop(struct ieee80211_sub_if_data *sdata) 8693 { 8694 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd; 8695 8696 /* 8697 * Make sure some work items will not run after this, 8698 * they will not do anything but might not have been 8699 * cancelled when disconnecting. 8700 */ 8701 wiphy_work_cancel(sdata->local->hw.wiphy, 8702 &ifmgd->monitor_work); 8703 wiphy_work_cancel(sdata->local->hw.wiphy, 8704 &ifmgd->beacon_connection_loss_work); 8705 wiphy_work_cancel(sdata->local->hw.wiphy, 8706 &ifmgd->csa_connection_drop_work); 8707 wiphy_work_cancel(sdata->local->hw.wiphy, 8708 &ifmgd->teardown_ttlm_work); 8709 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8710 &ifmgd->tdls_peer_del_work); 8711 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8712 &ifmgd->ml_reconf_work); 8713 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, &ifmgd->ttlm_work); 8714 wiphy_delayed_work_cancel(sdata->local->hw.wiphy, 8715 &ifmgd->neg_ttlm_timeout_work); 8716 8717 if (ifmgd->assoc_data) 8718 ieee80211_destroy_assoc_data(sdata, ASSOC_TIMEOUT); 8719 if (ifmgd->auth_data) 8720 ieee80211_destroy_auth_data(sdata, false); 8721 spin_lock_bh(&ifmgd->teardown_lock); 8722 if (ifmgd->teardown_skb) { 8723 kfree_skb(ifmgd->teardown_skb); 8724 ifmgd->teardown_skb = NULL; 8725 ifmgd->orig_teardown_skb = NULL; 8726 } 8727 kfree(ifmgd->assoc_req_ies); 8728 ifmgd->assoc_req_ies = NULL; 8729 ifmgd->assoc_req_ies_len = 0; 8730 spin_unlock_bh(&ifmgd->teardown_lock); 8731 del_timer_sync(&ifmgd->timer); 8732 } 8733 8734 void ieee80211_cqm_rssi_notify(struct ieee80211_vif *vif, 8735 enum nl80211_cqm_rssi_threshold_event rssi_event, 8736 s32 rssi_level, 8737 gfp_t gfp) 8738 { 8739 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8740 8741 trace_api_cqm_rssi_notify(sdata, rssi_event, rssi_level); 8742 8743 cfg80211_cqm_rssi_notify(sdata->dev, rssi_event, rssi_level, gfp); 8744 } 8745 EXPORT_SYMBOL(ieee80211_cqm_rssi_notify); 8746 8747 void ieee80211_cqm_beacon_loss_notify(struct ieee80211_vif *vif, gfp_t gfp) 8748 { 8749 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8750 8751 trace_api_cqm_beacon_loss_notify(sdata->local, sdata); 8752 8753 cfg80211_cqm_beacon_loss_notify(sdata->dev, gfp); 8754 } 8755 EXPORT_SYMBOL(ieee80211_cqm_beacon_loss_notify); 8756 8757 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata, 8758 int rssi_min_thold, 8759 int rssi_max_thold) 8760 { 8761 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold); 8762 8763 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION)) 8764 return; 8765 8766 /* 8767 * Scale up threshold values before storing it, as the RSSI averaging 8768 * algorithm uses a scaled up value as well. Change this scaling 8769 * factor if the RSSI averaging algorithm changes. 8770 */ 8771 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16; 8772 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16; 8773 } 8774 8775 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif, 8776 int rssi_min_thold, 8777 int rssi_max_thold) 8778 { 8779 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8780 8781 WARN_ON(rssi_min_thold == rssi_max_thold || 8782 rssi_min_thold > rssi_max_thold); 8783 8784 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold, 8785 rssi_max_thold); 8786 } 8787 EXPORT_SYMBOL(ieee80211_enable_rssi_reports); 8788 8789 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif) 8790 { 8791 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif); 8792 8793 _ieee80211_enable_rssi_reports(sdata, 0, 0); 8794 } 8795 EXPORT_SYMBOL(ieee80211_disable_rssi_reports); 8796